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linux/drivers/usb/host/xhci.c

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USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
/*
* xHCI host controller driver
*
* Copyright (C) 2008 Intel Corp.
*
* Author: Sarah Sharp
* Some code borrowed from the Linux EHCI driver.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
#include <linux/pci.h>
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
#include <linux/irq.h>
USB: xhci: Add memory allocation for USB3 bulk streams. Add support for allocating streams for USB 3.0 bulk endpoints. See Documentation/usb/bulk-streams.txt for more information about how and why you would use streams. When an endpoint has streams enabled, instead of having one ring where all transfers are enqueued to the hardware, it has several rings. The ring dequeue pointer in the endpoint context is changed to point to a "Stream Context Array". This is basically an array of pointers to transfer rings, one for each stream ID that the driver wants to use. The Stream Context Array size must be a power of two, and host controllers can place a limit on the size of the array (4 to 2^16 entries). These two facts make calculating the size of the Stream Context Array and the number of entries actually used by the driver a bit tricky. Besides the Stream Context Array and rings for all the stream IDs, we need one more data structure. The xHCI hardware will not tell us which stream ID a transfer event was for, but it will give us the slot ID, endpoint index, and physical address for the TRB that caused the event. For every endpoint on a device, add a radix tree to map physical TRB addresses to virtual segments within a stream ring. Keep track of whether an endpoint is transitioning to using streams, and don't enqueue any URBs while that's taking place. Refuse to transition an endpoint to streams if there are already URBs enqueued for that endpoint. We need to make sure that freeing streams does not fail, since a driver's disconnect() function may attempt to do this, and it cannot fail. Pre-allocate the command structure used to issue the Configure Endpoint command, and reserve space on the command ring for each stream endpoint. This may be a bit overkill, but it is permissible for the driver to allocate all streams in one call and free them in multiple calls. (It is not advised, however, since it is a waste of resources and time.) Even with the memory and ring room pre-allocated, freeing streams can still fail because the xHC rejects the configure endpoint command. It is valid (by the xHCI 0.96 spec) to return a "Bandwidth Error" or a "Resource Error" for a configure endpoint command. We should never see a Bandwidth Error, since bulk endpoints do not effect the reserved bandwidth. The host controller can still return a Resource Error, but it's improbable since the xHC would be going from a more resource-intensive configuration (streams) to a less resource-intensive configuration (no streams). If the xHC returns a Resource Error, the endpoint will be stuck with streams and will be unusable for drivers. It's an unavoidable consequence of broken host controller hardware. Includes bug fixes from the original patch, contributed by John Youn <John.Youn@synopsys.com> and Andy Green <AGreen@PLXTech.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-02 22:34:16 +00:00
#include <linux/log2.h>
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
#include <linux/module.h>
USB: xhci: Work around for chain bit in link TRBs. Different sections of the xHCI 0.95 specification had opposing requirements for the chain bit in a link transaction request buffer (TRB). The chain bit is used to designate that adjacent TRBs are all part of the same scatter gather list that should be sent to the device. Link TRBs can be in the middle, or at the beginning or end of these chained TRBs. Sections 4.11.5.1 and 6.4.4.1 both stated the link TRB "shall have the chain bit set to 1", meaning it is always chained to the next TRB. However, section 4.6.9 on the stop endpoint command has specific cases for what the hardware must do for a link TRB with the chain bit set to 0. The 0.96 specification errata later cleared up this issue by fixing the 4.11.5.1 and 6.4.4.1 sections to state that a link TRB can have the chain bit set to 1 or 0. The problem is that the xHCI cancellation code depends on the chain bit of the link TRB being cleared when it's at the end of a TD, and some 0.95 xHCI hardware simply stops processing the ring when it encounters a link TRB with the chain bit cleared. Allow users who are testing 0.95 xHCI prototypes to set a module parameter (link_quirk) to turn on this link TRB work around. Cancellation may not work if the ring is stopped exactly on a link TRB with chain bit set, but cancellation should be a relatively uncommon case. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:36 +00:00
#include <linux/moduleparam.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
#include <linux/slab.h>
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
#include "xhci.h"
#define DRIVER_AUTHOR "Sarah Sharp"
#define DRIVER_DESC "'eXtensible' Host Controller (xHC) Driver"
USB: xhci: Work around for chain bit in link TRBs. Different sections of the xHCI 0.95 specification had opposing requirements for the chain bit in a link transaction request buffer (TRB). The chain bit is used to designate that adjacent TRBs are all part of the same scatter gather list that should be sent to the device. Link TRBs can be in the middle, or at the beginning or end of these chained TRBs. Sections 4.11.5.1 and 6.4.4.1 both stated the link TRB "shall have the chain bit set to 1", meaning it is always chained to the next TRB. However, section 4.6.9 on the stop endpoint command has specific cases for what the hardware must do for a link TRB with the chain bit set to 0. The 0.96 specification errata later cleared up this issue by fixing the 4.11.5.1 and 6.4.4.1 sections to state that a link TRB can have the chain bit set to 1 or 0. The problem is that the xHCI cancellation code depends on the chain bit of the link TRB being cleared when it's at the end of a TD, and some 0.95 xHCI hardware simply stops processing the ring when it encounters a link TRB with the chain bit cleared. Allow users who are testing 0.95 xHCI prototypes to set a module parameter (link_quirk) to turn on this link TRB work around. Cancellation may not work if the ring is stopped exactly on a link TRB with chain bit set, but cancellation should be a relatively uncommon case. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:36 +00:00
/* Some 0.95 hardware can't handle the chain bit on a Link TRB being cleared */
static int link_quirk;
module_param(link_quirk, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(link_quirk, "Don't clear the chain bit on a link TRB");
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
/* TODO: copied from ehci-hcd.c - can this be refactored? */
/*
* handshake - spin reading hc until handshake completes or fails
* @ptr: address of hc register to be read
* @mask: bits to look at in result of read
* @done: value of those bits when handshake succeeds
* @usec: timeout in microseconds
*
* Returns negative errno, or zero on success
*
* Success happens when the "mask" bits have the specified value (hardware
* handshake done). There are two failure modes: "usec" have passed (major
* hardware flakeout), or the register reads as all-ones (hardware removed).
*/
static int handshake(struct xhci_hcd *xhci, void __iomem *ptr,
u32 mask, u32 done, int usec)
{
u32 result;
do {
result = xhci_readl(xhci, ptr);
if (result == ~(u32)0) /* card removed */
return -ENODEV;
result &= mask;
if (result == done)
return 0;
udelay(1);
usec--;
} while (usec > 0);
return -ETIMEDOUT;
}
/*
USB: xhci: Re-purpose xhci_quiesce(). xhci_quiesce() is basically a no-op right now. It's only called if HC_IS_RUNNING() is true, and the body of the function consists of a BUG_ON if HC_IS_RUNNING() is false. For the new xHCI watchdog timer, we need a new function that clears the xHCI running bit in the command register, but doesn't wait for the halt status to show up in the status register. Re-purpose xhci_quiesce() to do that. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:56:33 +00:00
* Disable interrupts and begin the xHCI halting process.
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
*/
USB: xhci: Re-purpose xhci_quiesce(). xhci_quiesce() is basically a no-op right now. It's only called if HC_IS_RUNNING() is true, and the body of the function consists of a BUG_ON if HC_IS_RUNNING() is false. For the new xHCI watchdog timer, we need a new function that clears the xHCI running bit in the command register, but doesn't wait for the halt status to show up in the status register. Re-purpose xhci_quiesce() to do that. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:56:33 +00:00
void xhci_quiesce(struct xhci_hcd *xhci)
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
{
u32 halted;
u32 cmd;
u32 mask;
mask = ~(XHCI_IRQS);
halted = xhci_readl(xhci, &xhci->op_regs->status) & STS_HALT;
if (!halted)
mask &= ~CMD_RUN;
cmd = xhci_readl(xhci, &xhci->op_regs->command);
cmd &= mask;
xhci_writel(xhci, cmd, &xhci->op_regs->command);
USB: xhci: Re-purpose xhci_quiesce(). xhci_quiesce() is basically a no-op right now. It's only called if HC_IS_RUNNING() is true, and the body of the function consists of a BUG_ON if HC_IS_RUNNING() is false. For the new xHCI watchdog timer, we need a new function that clears the xHCI running bit in the command register, but doesn't wait for the halt status to show up in the status register. Re-purpose xhci_quiesce() to do that. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:56:33 +00:00
}
/*
* Force HC into halt state.
*
* Disable any IRQs and clear the run/stop bit.
* HC will complete any current and actively pipelined transactions, and
* should halt within 16 microframes of the run/stop bit being cleared.
* Read HC Halted bit in the status register to see when the HC is finished.
* XXX: shouldn't we set HC_STATE_HALT here somewhere?
*/
int xhci_halt(struct xhci_hcd *xhci)
{
xhci_dbg(xhci, "// Halt the HC\n");
xhci_quiesce(xhci);
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
return handshake(xhci, &xhci->op_regs->status,
STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC);
}
USB: xhci: Wait for host to start running. When the run bit is set in the xHCI command register, it may take a few microseconds for the host to start running. We cannot ring any doorbells until the host is actually running, so wait until the status register says the host is running. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Reported-by: Shinya Saito <shinya.saito.sx@renesas.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-24 20:25:21 +00:00
/*
* Set the run bit and wait for the host to be running.
*/
int xhci_start(struct xhci_hcd *xhci)
{
u32 temp;
int ret;
temp = xhci_readl(xhci, &xhci->op_regs->command);
temp |= (CMD_RUN);
xhci_dbg(xhci, "// Turn on HC, cmd = 0x%x.\n",
temp);
xhci_writel(xhci, temp, &xhci->op_regs->command);
/*
* Wait for the HCHalted Status bit to be 0 to indicate the host is
* running.
*/
ret = handshake(xhci, &xhci->op_regs->status,
STS_HALT, 0, XHCI_MAX_HALT_USEC);
if (ret == -ETIMEDOUT)
xhci_err(xhci, "Host took too long to start, "
"waited %u microseconds.\n",
XHCI_MAX_HALT_USEC);
return ret;
}
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
/*
* Reset a halted HC, and set the internal HC state to HC_STATE_HALT.
*
* This resets pipelines, timers, counters, state machines, etc.
* Transactions will be terminated immediately, and operational registers
* will be set to their defaults.
*/
int xhci_reset(struct xhci_hcd *xhci)
{
u32 command;
u32 state;
USB: xhci: Wait for controller to be ready after reset. After software resets an xHCI host controller, it must wait for the "Controller Not Ready" (CNR) bit in the status register to be cleared. Software is not supposed to ring any doorbells or write to any registers except the status register until this bit is cleared. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-24 20:25:15 +00:00
int ret;
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
state = xhci_readl(xhci, &xhci->op_regs->status);
USB: xhci: Don't oops if the host doesn't halt. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:50 +00:00
if ((state & STS_HALT) == 0) {
xhci_warn(xhci, "Host controller not halted, aborting reset.\n");
return 0;
}
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
xhci_dbg(xhci, "// Reset the HC\n");
command = xhci_readl(xhci, &xhci->op_regs->command);
command |= CMD_RESET;
xhci_writel(xhci, command, &xhci->op_regs->command);
/* XXX: Why does EHCI set this here? Shouldn't other code do this? */
xhci_to_hcd(xhci)->state = HC_STATE_HALT;
USB: xhci: Wait for controller to be ready after reset. After software resets an xHCI host controller, it must wait for the "Controller Not Ready" (CNR) bit in the status register to be cleared. Software is not supposed to ring any doorbells or write to any registers except the status register until this bit is cleared. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-24 20:25:15 +00:00
ret = handshake(xhci, &xhci->op_regs->command,
CMD_RESET, 0, 250 * 1000);
if (ret)
return ret;
xhci_dbg(xhci, "Wait for controller to be ready for doorbell rings\n");
/*
* xHCI cannot write to any doorbells or operational registers other
* than status until the "Controller Not Ready" flag is cleared.
*/
return handshake(xhci, &xhci->op_regs->status, STS_CNR, 0, 250 * 1000);
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
}
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
/*
* Free IRQs
* free all IRQs request
*/
static void xhci_free_irq(struct xhci_hcd *xhci)
{
int i;
struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
/* return if using legacy interrupt */
if (xhci_to_hcd(xhci)->irq >= 0)
return;
if (xhci->msix_entries) {
for (i = 0; i < xhci->msix_count; i++)
if (xhci->msix_entries[i].vector)
free_irq(xhci->msix_entries[i].vector,
xhci_to_hcd(xhci));
} else if (pdev->irq >= 0)
free_irq(pdev->irq, xhci_to_hcd(xhci));
return;
}
/*
* Set up MSI
*/
static int xhci_setup_msi(struct xhci_hcd *xhci)
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
{
int ret;
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
ret = pci_enable_msi(pdev);
if (ret) {
xhci_err(xhci, "failed to allocate MSI entry\n");
return ret;
}
ret = request_irq(pdev->irq, (irq_handler_t)xhci_msi_irq,
0, "xhci_hcd", xhci_to_hcd(xhci));
if (ret) {
xhci_err(xhci, "disable MSI interrupt\n");
pci_disable_msi(pdev);
}
return ret;
}
/*
* Set up MSI-X
*/
static int xhci_setup_msix(struct xhci_hcd *xhci)
{
int i, ret = 0;
xHCI: synchronize irq in xhci_suspend() Synchronize the interrupts instead of free them in xhci_suspend(). This will prevent a double free when the host is suspended and then the card removed. Set the flag hcd->msix_enabled when using MSI-X, and check the flag in suspend_common(). MSI-X synchronization will be handled by xhci_suspend(), and MSI/INTx will be synchronized in suspend_common(). This patch should be queued for the 2.6.37 stable tree. Reported-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org
2010-12-27 09:39:02 +00:00
struct usb_hcd *hcd = xhci_to_hcd(xhci);
struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
/*
* calculate number of msi-x vectors supported.
* - HCS_MAX_INTRS: the max number of interrupts the host can handle,
* with max number of interrupters based on the xhci HCSPARAMS1.
* - num_online_cpus: maximum msi-x vectors per CPUs core.
* Add additional 1 vector to ensure always available interrupt.
*/
xhci->msix_count = min(num_online_cpus() + 1,
HCS_MAX_INTRS(xhci->hcs_params1));
xhci->msix_entries =
kmalloc((sizeof(struct msix_entry))*xhci->msix_count,
Revert "USB: xhci: Use GFP_ATOMIC under spin_lock" This reverts commit ef821ae70fc35a76bdce7e07c70a1a7c2c33cdb9. The correct thing to do is to drop the spinlock, not change the GFP flag here. Thanks to Sarah for pointing out I shouldn't have taken this patch in the first place. Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-11 17:41:02 +00:00
GFP_KERNEL);
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
if (!xhci->msix_entries) {
xhci_err(xhci, "Failed to allocate MSI-X entries\n");
return -ENOMEM;
}
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
for (i = 0; i < xhci->msix_count; i++) {
xhci->msix_entries[i].entry = i;
xhci->msix_entries[i].vector = 0;
}
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
ret = pci_enable_msix(pdev, xhci->msix_entries, xhci->msix_count);
if (ret) {
xhci_err(xhci, "Failed to enable MSI-X\n");
goto free_entries;
}
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
for (i = 0; i < xhci->msix_count; i++) {
ret = request_irq(xhci->msix_entries[i].vector,
(irq_handler_t)xhci_msi_irq,
0, "xhci_hcd", xhci_to_hcd(xhci));
if (ret)
goto disable_msix;
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
}
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
xHCI: synchronize irq in xhci_suspend() Synchronize the interrupts instead of free them in xhci_suspend(). This will prevent a double free when the host is suspended and then the card removed. Set the flag hcd->msix_enabled when using MSI-X, and check the flag in suspend_common(). MSI-X synchronization will be handled by xhci_suspend(), and MSI/INTx will be synchronized in suspend_common(). This patch should be queued for the 2.6.37 stable tree. Reported-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org
2010-12-27 09:39:02 +00:00
hcd->msix_enabled = 1;
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
return ret;
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
disable_msix:
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
xhci_err(xhci, "disable MSI-X interrupt\n");
xhci_free_irq(xhci);
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
pci_disable_msix(pdev);
free_entries:
kfree(xhci->msix_entries);
xhci->msix_entries = NULL;
return ret;
}
/* Free any IRQs and disable MSI-X */
static void xhci_cleanup_msix(struct xhci_hcd *xhci)
{
xHCI: synchronize irq in xhci_suspend() Synchronize the interrupts instead of free them in xhci_suspend(). This will prevent a double free when the host is suspended and then the card removed. Set the flag hcd->msix_enabled when using MSI-X, and check the flag in suspend_common(). MSI-X synchronization will be handled by xhci_suspend(), and MSI/INTx will be synchronized in suspend_common(). This patch should be queued for the 2.6.37 stable tree. Reported-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org
2010-12-27 09:39:02 +00:00
struct usb_hcd *hcd = xhci_to_hcd(xhci);
struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
xhci_free_irq(xhci);
if (xhci->msix_entries) {
pci_disable_msix(pdev);
kfree(xhci->msix_entries);
xhci->msix_entries = NULL;
} else {
pci_disable_msi(pdev);
}
xHCI: synchronize irq in xhci_suspend() Synchronize the interrupts instead of free them in xhci_suspend(). This will prevent a double free when the host is suspended and then the card removed. Set the flag hcd->msix_enabled when using MSI-X, and check the flag in suspend_common(). MSI-X synchronization will be handled by xhci_suspend(), and MSI/INTx will be synchronized in suspend_common(). This patch should be queued for the 2.6.37 stable tree. Reported-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org
2010-12-27 09:39:02 +00:00
hcd->msix_enabled = 0;
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
return;
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
}
/*
* Initialize memory for HCD and xHC (one-time init).
*
* Program the PAGESIZE register, initialize the device context array, create
* device contexts (?), set up a command ring segment (or two?), create event
* ring (one for now).
*/
int xhci_init(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
int retval = 0;
xhci_dbg(xhci, "xhci_init\n");
spin_lock_init(&xhci->lock);
USB: xhci: Work around for chain bit in link TRBs. Different sections of the xHCI 0.95 specification had opposing requirements for the chain bit in a link transaction request buffer (TRB). The chain bit is used to designate that adjacent TRBs are all part of the same scatter gather list that should be sent to the device. Link TRBs can be in the middle, or at the beginning or end of these chained TRBs. Sections 4.11.5.1 and 6.4.4.1 both stated the link TRB "shall have the chain bit set to 1", meaning it is always chained to the next TRB. However, section 4.6.9 on the stop endpoint command has specific cases for what the hardware must do for a link TRB with the chain bit set to 0. The 0.96 specification errata later cleared up this issue by fixing the 4.11.5.1 and 6.4.4.1 sections to state that a link TRB can have the chain bit set to 1 or 0. The problem is that the xHCI cancellation code depends on the chain bit of the link TRB being cleared when it's at the end of a TD, and some 0.95 xHCI hardware simply stops processing the ring when it encounters a link TRB with the chain bit cleared. Allow users who are testing 0.95 xHCI prototypes to set a module parameter (link_quirk) to turn on this link TRB work around. Cancellation may not work if the ring is stopped exactly on a link TRB with chain bit set, but cancellation should be a relatively uncommon case. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:36 +00:00
if (link_quirk) {
xhci_dbg(xhci, "QUIRK: Not clearing Link TRB chain bits.\n");
xhci->quirks |= XHCI_LINK_TRB_QUIRK;
} else {
USB: xhci: Add quirk for Fresco Logic xHCI hardware. This Fresco Logic xHCI host controller chip revision puts bad data into the output endpoint context after a Reset Endpoint command. It needs a Configure Endpoint command (instead of a Set TR Dequeue Pointer command) after the reset endpoint command. Set up the input context before issuing the Reset Endpoint command so we don't copy bad data from the output endpoint context. The HW also can't handle two commands queued at once, so submit the TRB for the Configure Endpoint command in the event handler for the Reset Endpoint command. Devices that stall on control endpoints before a configuration is selected will not work under this Fresco Logic xHCI host controller revision. This patch is for prototype hardware that will be given to other companies for evaluation purposes only, and should not reach consumer hands. Fresco Logic's next chip rev should have this bug fixed. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:55 +00:00
xhci_dbg(xhci, "xHCI doesn't need link TRB QUIRK\n");
USB: xhci: Work around for chain bit in link TRBs. Different sections of the xHCI 0.95 specification had opposing requirements for the chain bit in a link transaction request buffer (TRB). The chain bit is used to designate that adjacent TRBs are all part of the same scatter gather list that should be sent to the device. Link TRBs can be in the middle, or at the beginning or end of these chained TRBs. Sections 4.11.5.1 and 6.4.4.1 both stated the link TRB "shall have the chain bit set to 1", meaning it is always chained to the next TRB. However, section 4.6.9 on the stop endpoint command has specific cases for what the hardware must do for a link TRB with the chain bit set to 0. The 0.96 specification errata later cleared up this issue by fixing the 4.11.5.1 and 6.4.4.1 sections to state that a link TRB can have the chain bit set to 1 or 0. The problem is that the xHCI cancellation code depends on the chain bit of the link TRB being cleared when it's at the end of a TD, and some 0.95 xHCI hardware simply stops processing the ring when it encounters a link TRB with the chain bit cleared. Allow users who are testing 0.95 xHCI prototypes to set a module parameter (link_quirk) to turn on this link TRB work around. Cancellation may not work if the ring is stopped exactly on a link TRB with chain bit set, but cancellation should be a relatively uncommon case. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:36 +00:00
}
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
retval = xhci_mem_init(xhci, GFP_KERNEL);
xhci_dbg(xhci, "Finished xhci_init\n");
return retval;
}
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
/*-------------------------------------------------------------------------*/
#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
USB: xhci: Avoid global namespace pollution. Make all globally visible functions start with xhci_ and mark functions as static if they're only called within the same C file. Fix some long lines while we're at it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:05:20 +00:00
void xhci_event_ring_work(unsigned long arg)
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
{
unsigned long flags;
int temp;
USB: xhci: Represent 64-bit addresses with one u64. There are several xHCI data structures that use two 32-bit fields to represent a 64-bit address. Since some architectures don't support 64-bit PCI writes, the fields need to be written in two 32-bit writes. The xHCI specification says that if a platform is incapable of generating 64-bit writes, software must write the low 32-bits first, then the high 32-bits. Hardware that supports 64-bit addressing will wait for the high 32-bit write before reading the revised value, and hardware that only supports 32-bit writes will ignore the high 32-bit write. Previous xHCI code represented 64-bit addresses with two u32 values. This lead to buggy code that would write the 32-bits in the wrong order, or forget to write the upper 32-bits. Change the two u32s to one u64 and create a function call to write all 64-bit addresses in the proper order. This new function could be modified in the future if all platforms support 64-bit writes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:31 +00:00
u64 temp_64;
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
struct xhci_hcd *xhci = (struct xhci_hcd *) arg;
int i, j;
xhci_dbg(xhci, "Poll event ring: %lu\n", jiffies);
spin_lock_irqsave(&xhci->lock, flags);
temp = xhci_readl(xhci, &xhci->op_regs->status);
xhci_dbg(xhci, "op reg status = 0x%x\n", temp);
USB: xhci: Add watchdog timer for URB cancellation. In order to giveback a canceled URB, we must ensure that the xHCI hardware will not access the buffer in an URB. We can't modify the buffer pointers on endpoint rings without issuing and waiting for a stop endpoint command. Since URBs can be canceled in interrupt context, we can't wait on that command. The old code trusted that the host controller would respond to the command, and would giveback the URBs in the event handler. If the hardware never responds to the stop endpoint command, the URBs will never be completed, and we might hang the USB subsystem. Implement a watchdog timer that is spawned whenever a stop endpoint command is queued. If a stop endpoint command event is found on the event ring during an interrupt, we need to stop the watchdog timer with del_timer(). Since del_timer() can fail if the timer is running and waiting on the xHCI lock, we need a way to signal to the timer that everything is fine and it should exit. If we simply clear EP_HALT_PENDING, a new stop endpoint command could sneak in and set it before the watchdog timer can grab the lock. Instead we use a combination of the EP_HALT_PENDING flag and a counter for the number of pending stop endpoint commands (xhci_virt_ep->stop_cmds_pending). If we need to cancel the watchdog timer and del_timer() succeeds, we decrement the number of pending stop endpoint commands. If del_timer() fails, we leave the number of pending stop endpoint commands alone. In either case, we clear the EP_HALT_PENDING flag. The timer will decrement the number of pending stop endpoint commands once it obtains the lock. If the timer is the tail end of the last stop endpoint command (xhci_virt_ep->stop_cmds_pending == 0), and the endpoint's command is still pending (EP_HALT_PENDING is set), we assume the host is dying. The watchdog timer will set XHCI_STATE_DYING, try to halt the xHCI host, and give back all pending URBs. Various other places in the driver need to check whether the xHCI host is dying. If the interrupt handler ever notices, it should immediately stop processing events. The URB enqueue function should also return -ESHUTDOWN. The URB dequeue function should simply return the value of usb_hcd_check_unlink_urb() and the watchdog timer will take care of giving the URB back. When a device is disconnected, the xHCI hardware structures should be freed without issuing a disable slot command (since the hardware probably won't respond to it anyway). The debugging polling loop should stop polling if the host is dying. When a device is disconnected, any pending watchdog timers are killed with del_timer_sync(). It must be synchronous so that the watchdog timer doesn't attempt to access the freed endpoint structures. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:57:01 +00:00
if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING)) {
USB: xhci: Stop debugging polling loop when HC dies. If the host controller card is removed from the system, stop the timer function to debug the xHCI rings. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-16 23:42:30 +00:00
xhci_dbg(xhci, "HW died, polling stopped.\n");
spin_unlock_irqrestore(&xhci->lock, flags);
return;
}
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
xhci_dbg(xhci, "ir_set 0 pending = 0x%x\n", temp);
xhci_dbg(xhci, "No-op commands handled = %d\n", xhci->noops_handled);
xhci_dbg(xhci, "HC error bitmask = 0x%x\n", xhci->error_bitmask);
xhci->error_bitmask = 0;
xhci_dbg(xhci, "Event ring:\n");
xhci_debug_segment(xhci, xhci->event_ring->deq_seg);
xhci_dbg_ring_ptrs(xhci, xhci->event_ring);
USB: xhci: Represent 64-bit addresses with one u64. There are several xHCI data structures that use two 32-bit fields to represent a 64-bit address. Since some architectures don't support 64-bit PCI writes, the fields need to be written in two 32-bit writes. The xHCI specification says that if a platform is incapable of generating 64-bit writes, software must write the low 32-bits first, then the high 32-bits. Hardware that supports 64-bit addressing will wait for the high 32-bit write before reading the revised value, and hardware that only supports 32-bit writes will ignore the high 32-bit write. Previous xHCI code represented 64-bit addresses with two u32 values. This lead to buggy code that would write the 32-bits in the wrong order, or forget to write the upper 32-bits. Change the two u32s to one u64 and create a function call to write all 64-bit addresses in the proper order. This new function could be modified in the future if all platforms support 64-bit writes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:31 +00:00
temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue);
temp_64 &= ~ERST_PTR_MASK;
xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64);
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
xhci_dbg(xhci, "Command ring:\n");
xhci_debug_segment(xhci, xhci->cmd_ring->deq_seg);
xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring);
xhci_dbg_cmd_ptrs(xhci);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
for (i = 0; i < MAX_HC_SLOTS; ++i) {
USB: xhci: Endpoint representation refactoring. The xhci_ring structure contained information that is really related to an endpoint, not a ring. This will cause problems later when endpoint streams are supported and there are multiple rings per endpoint. Move the endpoint state and cancellation information into a new virtual endpoint structure, xhci_virt_ep. The list of TRBs to be cancelled should be per endpoint, not per ring, for easy access. There can be only one TRB that the endpoint stopped on after a stop endpoint command (even with streams enabled); move the stopped TRB information into the new virtual endpoint structure. Also move the 31 endpoint rings and temporary ring storage from the virtual device structure (xhci_virt_device) into the virtual endpoint structure (xhci_virt_ep). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:09 +00:00
if (!xhci->devs[i])
continue;
for (j = 0; j < 31; ++j) {
USB: xhci: Correct assumptions about number of rings per endpoint. Much of the xHCI driver code assumes that endpoints only have one ring. Now an endpoint can have one ring per enabled stream ID, so correct that assumption. Use functions that translate the stream_id field in the URB or the DMA address of a TRB into the correct stream ring. Correct the polling loop to print out all enabled stream rings. Make the URB cancellation routine find the correct stream ring if the URB has stream_id set. Make sure the URB enqueueing routine does the same. Also correct the code that handles stalled/halted endpoints. Check that commands and registers that can take stream IDs handle them properly. That includes ringing an endpoint doorbell, resetting a stalled/halted endpoint, and setting a transfer ring dequeue pointer (since that command can set the dequeue pointer in a stream context or an endpoint context). Correct the transfer event handler to translate a TRB DMA address into the stream ring it was enqueued to. Make the code to allocate and prepare TD structures adds the TD to the right td_list for the stream ring. Make sure the code to give the first TRB in a TD to the hardware manipulates the correct stream ring. When an endpoint stalls, store the stream ID of the stream ring that stalled in the xhci_virt_ep structure. Use that instead of the stream ID in the URB, since an URB may be re-used after it is given back after a non-control endpoint stall. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-02 22:34:43 +00:00
xhci_dbg_ep_rings(xhci, i, j, &xhci->devs[i]->eps[j]);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
}
}
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
if (xhci->noops_submitted != NUM_TEST_NOOPS)
USB: xhci: Avoid global namespace pollution. Make all globally visible functions start with xhci_ and mark functions as static if they're only called within the same C file. Fix some long lines while we're at it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:05:20 +00:00
if (xhci_setup_one_noop(xhci))
xhci_ring_cmd_db(xhci);
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
spin_unlock_irqrestore(&xhci->lock, flags);
if (!xhci->zombie)
mod_timer(&xhci->event_ring_timer, jiffies + POLL_TIMEOUT * HZ);
else
xhci_dbg(xhci, "Quit polling the event ring.\n");
}
#endif
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
/*
* Start the HC after it was halted.
*
* This function is called by the USB core when the HC driver is added.
* Its opposite is xhci_stop().
*
* xhci_init() must be called once before this function can be called.
* Reset the HC, enable device slot contexts, program DCBAAP, and
* set command ring pointer and event ring pointer.
*
* Setup MSI-X vectors and enable interrupts.
*/
int xhci_run(struct usb_hcd *hcd)
{
u32 temp;
USB: xhci: Represent 64-bit addresses with one u64. There are several xHCI data structures that use two 32-bit fields to represent a 64-bit address. Since some architectures don't support 64-bit PCI writes, the fields need to be written in two 32-bit writes. The xHCI specification says that if a platform is incapable of generating 64-bit writes, software must write the low 32-bits first, then the high 32-bits. Hardware that supports 64-bit addressing will wait for the high 32-bit write before reading the revised value, and hardware that only supports 32-bit writes will ignore the high 32-bit write. Previous xHCI code represented 64-bit addresses with two u32 values. This lead to buggy code that would write the 32-bits in the wrong order, or forget to write the upper 32-bits. Change the two u32s to one u64 and create a function call to write all 64-bit addresses in the proper order. This new function could be modified in the future if all platforms support 64-bit writes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:31 +00:00
u64 temp_64;
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
u32 ret;
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
void (*doorbell)(struct xhci_hcd *) = NULL;
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
USB: xhci: Root hub support. Add functionality for getting port status and hub descriptor for xHCI root hubs. This is WIP because the USB 3.0 hub descriptor is different from the USB 2.0 hub descriptor. For now, we lie about the root hub descriptor because the changes won't effect how the core talks to the root hub. Later we will need to add the USB 3.0 hub descriptor for real hubs, and this code might change. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:12 +00:00
hcd->uses_new_polling = 1;
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
xhci_dbg(xhci, "xhci_run\n");
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
/* unregister the legacy interrupt */
if (hcd->irq)
free_irq(hcd->irq, hcd);
hcd->irq = -1;
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
ret = xhci_setup_msix(xhci);
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
if (ret)
/* fall back to msi*/
ret = xhci_setup_msi(xhci);
if (ret) {
/* fall back to legacy interrupt*/
ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED,
hcd->irq_descr, hcd);
if (ret) {
xhci_err(xhci, "request interrupt %d failed\n",
pdev->irq);
return ret;
}
hcd->irq = pdev->irq;
}
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
init_timer(&xhci->event_ring_timer);
xhci->event_ring_timer.data = (unsigned long) xhci;
USB: xhci: Avoid global namespace pollution. Make all globally visible functions start with xhci_ and mark functions as static if they're only called within the same C file. Fix some long lines while we're at it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:05:20 +00:00
xhci->event_ring_timer.function = xhci_event_ring_work;
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
/* Poll the event ring */
xhci->event_ring_timer.expires = jiffies + POLL_TIMEOUT * HZ;
xhci->zombie = 0;
xhci_dbg(xhci, "Setting event ring polling timer\n");
add_timer(&xhci->event_ring_timer);
#endif
USB: xhci: Make debugging more verbose. Add more debugging to the irq handler, slot context initialization, ring operations, URB cancellation, and MMIO writes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:46 +00:00
xhci_dbg(xhci, "Command ring memory map follows:\n");
xhci_debug_ring(xhci, xhci->cmd_ring);
xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring);
xhci_dbg_cmd_ptrs(xhci);
xhci_dbg(xhci, "ERST memory map follows:\n");
xhci_dbg_erst(xhci, &xhci->erst);
xhci_dbg(xhci, "Event ring:\n");
xhci_debug_ring(xhci, xhci->event_ring);
xhci_dbg_ring_ptrs(xhci, xhci->event_ring);
temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue);
temp_64 &= ~ERST_PTR_MASK;
xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64);
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
xhci_dbg(xhci, "// Set the interrupt modulation register\n");
temp = xhci_readl(xhci, &xhci->ir_set->irq_control);
USB: xHCI: Fix interrupt moderation. Mask off the lower 16 bits of the interrupt control register, instead of masking off the upper 16 bits. The interrupt moderation interval field is the lower 16 bytes, and is set to 0x4000 (1ms) by default. The previous code was adding 40 us to the default value, instead of setting it to 40 us. This makes performance really bad. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-05-14 18:44:26 +00:00
temp &= ~ER_IRQ_INTERVAL_MASK;
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
temp |= (u32) 160;
xhci_writel(xhci, temp, &xhci->ir_set->irq_control);
/* Set the HCD state before we enable the irqs */
hcd->state = HC_STATE_RUNNING;
temp = xhci_readl(xhci, &xhci->op_regs->command);
temp |= (CMD_EIE);
xhci_dbg(xhci, "// Enable interrupts, cmd = 0x%x.\n",
temp);
xhci_writel(xhci, temp, &xhci->op_regs->command);
temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
USB: xhci: fix lots of compiler warnings. Turns out someone never built this code on a 64bit platform. Someone owes me a beer... Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:14:08 +00:00
xhci_dbg(xhci, "// Enabling event ring interrupter %p by writing 0x%x to irq_pending\n",
xhci->ir_set, (unsigned int) ER_IRQ_ENABLE(temp));
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
xhci_writel(xhci, ER_IRQ_ENABLE(temp),
&xhci->ir_set->irq_pending);
xhci_print_ir_set(xhci, xhci->ir_set, 0);
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
if (NUM_TEST_NOOPS > 0)
USB: xhci: Avoid global namespace pollution. Make all globally visible functions start with xhci_ and mark functions as static if they're only called within the same C file. Fix some long lines while we're at it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:05:20 +00:00
doorbell = xhci_setup_one_noop(xhci);
USB: xhci: Print NEC firmware version. The NEC xHCI host controller firmware version can be found by putting a vendor-specific command on the command ring and extracting the BCD encoded-version out of the vendor-specific event TRB. The firmware version debug line in dmesg will look like: xhci_hcd 0000:05:00.0: NEC firmware version 30.21 (NEC merged with Renesas Technologies and became Renesas Electronics on April 1, 2010. I have their OK to merge this vendor-specific code.) Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: Satoshi Otani <satoshi.otani.xm@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-24 20:25:28 +00:00
if (xhci->quirks & XHCI_NEC_HOST)
xhci_queue_vendor_command(xhci, 0, 0, 0,
TRB_TYPE(TRB_NEC_GET_FW));
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
USB: xhci: Wait for host to start running. When the run bit is set in the xHCI command register, it may take a few microseconds for the host to start running. We cannot ring any doorbells until the host is actually running, so wait until the status register says the host is running. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Reported-by: Shinya Saito <shinya.saito.sx@renesas.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-24 20:25:21 +00:00
if (xhci_start(xhci)) {
xhci_halt(xhci);
return -ENODEV;
}
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
if (doorbell)
(*doorbell)(xhci);
USB: xhci: Print NEC firmware version. The NEC xHCI host controller firmware version can be found by putting a vendor-specific command on the command ring and extracting the BCD encoded-version out of the vendor-specific event TRB. The firmware version debug line in dmesg will look like: xhci_hcd 0000:05:00.0: NEC firmware version 30.21 (NEC merged with Renesas Technologies and became Renesas Electronics on April 1, 2010. I have their OK to merge this vendor-specific code.) Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: Satoshi Otani <satoshi.otani.xm@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-24 20:25:28 +00:00
if (xhci->quirks & XHCI_NEC_HOST)
xhci_ring_cmd_db(xhci);
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
xhci_dbg(xhci, "Finished xhci_run\n");
return 0;
}
/*
* Stop xHCI driver.
*
* This function is called by the USB core when the HC driver is removed.
* Its opposite is xhci_run().
*
* Disable device contexts, disable IRQs, and quiesce the HC.
* Reset the HC, finish any completed transactions, and cleanup memory.
*/
void xhci_stop(struct usb_hcd *hcd)
{
u32 temp;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
spin_lock_irq(&xhci->lock);
xhci_halt(xhci);
xhci_reset(xhci);
spin_unlock_irq(&xhci->lock);
xhci: Do not run xhci_cleanup_msix with irq disabled when unloading xhci_hcd, I got: [ 134.856813] xhci_hcd 0000:02:00.0: remove, state 4 [ 134.858140] usb usb3: USB disconnect, address 1 [ 134.874956] xhci_hcd 0000:02:00.0: Host controller not halted, aborting reset. [ 134.876351] BUG: sleeping function called from invalid context at kernel/mutex.c:85 [ 134.877657] in_atomic(): 0, irqs_disabled(): 1, pid: 1451, name: modprobe [ 134.878975] Pid: 1451, comm: modprobe Not tainted 2.6.37-rc5+ #162 [ 134.880298] Call Trace: [ 134.881602] [<ffffffff8104156a>] __might_sleep+0xeb/0xf0 [ 134.882921] [<ffffffff814763dc>] mutex_lock+0x24/0x50 [ 134.884229] [<ffffffff810a745c>] free_desc+0x2e/0x5f [ 134.885538] [<ffffffff810a74c8>] irq_free_descs+0x3b/0x71 [ 134.886853] [<ffffffff8102584d>] free_irq_at+0x31/0x36 [ 134.888167] [<ffffffff8102723f>] destroy_irq+0x69/0x71 [ 134.889486] [<ffffffff8102747a>] native_teardown_msi_irq+0xe/0x10 [ 134.890820] [<ffffffff8124c382>] default_teardown_msi_irqs+0x57/0x80 [ 134.892158] [<ffffffff8124be46>] free_msi_irqs+0x8b/0xe9 [ 134.893504] [<ffffffff8124cd46>] pci_disable_msix+0x35/0x39 [ 134.894844] [<ffffffffa01b444a>] xhci_cleanup_msix+0x31/0x51 [xhci_hcd] [ 134.896186] [<ffffffffa01b4b3a>] xhci_stop+0x3a/0x80 [xhci_hcd] [ 134.897521] [<ffffffff81341dd4>] usb_remove_hcd+0xfd/0x14a [ 134.898859] [<ffffffff813500ae>] usb_hcd_pci_remove+0x5c/0xc6 [ 134.900193] [<ffffffff8123c606>] pci_device_remove+0x3f/0x91 [ 134.901535] [<ffffffff812e7ea4>] __device_release_driver+0x83/0xd9 [ 134.902899] [<ffffffff812e8571>] driver_detach+0x86/0xad [ 134.904222] [<ffffffff812e7d56>] bus_remove_driver+0xb2/0xd8 [ 134.905540] [<ffffffff812e8633>] driver_unregister+0x6c/0x74 [ 134.906839] [<ffffffff8123c8e4>] pci_unregister_driver+0x44/0x89 [ 134.908121] [<ffffffffa01b940e>] xhci_unregister_pci+0x15/0x17 [xhci_hcd] [ 134.909396] [<ffffffffa01bd7d2>] xhci_hcd_cleanup+0xe/0x10 [xhci_hcd] [ 134.910652] [<ffffffff8107fcd1>] sys_delete_module+0x1ca/0x23b [ 134.911882] [<ffffffff81123932>] ? path_put+0x22/0x26 [ 134.913104] [<ffffffff8109a800>] ? audit_syscall_entry+0x2c/0x148 [ 134.914333] [<ffffffff8100ac82>] system_call_fastpath+0x16/0x1b [ 134.915658] xhci_hcd 0000:02:00.0: USB bus 3 deregistered [ 134.916465] xhci_hcd 0000:02:00.0: PCI INT A disabled and the same issue when xhci_suspend is invoked. (Note from Sarah: That's fixed by Andiry's patch before this, by synchronizing the irqs rather than freeing them on suspend.) Do not run xhci_cleanup_msix with irq disabled. This patch should be queued for the 2.6.37 stable tree. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org
2010-12-17 21:17:04 +00:00
xhci_cleanup_msix(xhci);
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
/* Tell the event ring poll function not to reschedule */
xhci->zombie = 1;
del_timer_sync(&xhci->event_ring_timer);
#endif
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
xhci_dbg(xhci, "// Disabling event ring interrupts\n");
temp = xhci_readl(xhci, &xhci->op_regs->status);
xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status);
temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
xhci_writel(xhci, ER_IRQ_DISABLE(temp),
&xhci->ir_set->irq_pending);
xhci_print_ir_set(xhci, xhci->ir_set, 0);
xhci_dbg(xhci, "cleaning up memory\n");
xhci_mem_cleanup(xhci);
xhci_dbg(xhci, "xhci_stop completed - status = %x\n",
xhci_readl(xhci, &xhci->op_regs->status));
}
/*
* Shutdown HC (not bus-specific)
*
* This is called when the machine is rebooting or halting. We assume that the
* machine will be powered off, and the HC's internal state will be reset.
* Don't bother to free memory.
*/
void xhci_shutdown(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
spin_lock_irq(&xhci->lock);
xhci_halt(xhci);
USB: xHCI: Supporting MSI/MSI-X Enable MSI/MSI-X supporting in xhci driver. Provide the mechanism to fall back using MSI and Legacy IRQs if MSI-X IRQs register failed. Signed-off-by: Dong Nguyen <Dong.Nguyen@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>, Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-21 23:56:08 +00:00
spin_unlock_irq(&xhci->lock);
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
xhci: Do not run xhci_cleanup_msix with irq disabled when unloading xhci_hcd, I got: [ 134.856813] xhci_hcd 0000:02:00.0: remove, state 4 [ 134.858140] usb usb3: USB disconnect, address 1 [ 134.874956] xhci_hcd 0000:02:00.0: Host controller not halted, aborting reset. [ 134.876351] BUG: sleeping function called from invalid context at kernel/mutex.c:85 [ 134.877657] in_atomic(): 0, irqs_disabled(): 1, pid: 1451, name: modprobe [ 134.878975] Pid: 1451, comm: modprobe Not tainted 2.6.37-rc5+ #162 [ 134.880298] Call Trace: [ 134.881602] [<ffffffff8104156a>] __might_sleep+0xeb/0xf0 [ 134.882921] [<ffffffff814763dc>] mutex_lock+0x24/0x50 [ 134.884229] [<ffffffff810a745c>] free_desc+0x2e/0x5f [ 134.885538] [<ffffffff810a74c8>] irq_free_descs+0x3b/0x71 [ 134.886853] [<ffffffff8102584d>] free_irq_at+0x31/0x36 [ 134.888167] [<ffffffff8102723f>] destroy_irq+0x69/0x71 [ 134.889486] [<ffffffff8102747a>] native_teardown_msi_irq+0xe/0x10 [ 134.890820] [<ffffffff8124c382>] default_teardown_msi_irqs+0x57/0x80 [ 134.892158] [<ffffffff8124be46>] free_msi_irqs+0x8b/0xe9 [ 134.893504] [<ffffffff8124cd46>] pci_disable_msix+0x35/0x39 [ 134.894844] [<ffffffffa01b444a>] xhci_cleanup_msix+0x31/0x51 [xhci_hcd] [ 134.896186] [<ffffffffa01b4b3a>] xhci_stop+0x3a/0x80 [xhci_hcd] [ 134.897521] [<ffffffff81341dd4>] usb_remove_hcd+0xfd/0x14a [ 134.898859] [<ffffffff813500ae>] usb_hcd_pci_remove+0x5c/0xc6 [ 134.900193] [<ffffffff8123c606>] pci_device_remove+0x3f/0x91 [ 134.901535] [<ffffffff812e7ea4>] __device_release_driver+0x83/0xd9 [ 134.902899] [<ffffffff812e8571>] driver_detach+0x86/0xad [ 134.904222] [<ffffffff812e7d56>] bus_remove_driver+0xb2/0xd8 [ 134.905540] [<ffffffff812e8633>] driver_unregister+0x6c/0x74 [ 134.906839] [<ffffffff8123c8e4>] pci_unregister_driver+0x44/0x89 [ 134.908121] [<ffffffffa01b940e>] xhci_unregister_pci+0x15/0x17 [xhci_hcd] [ 134.909396] [<ffffffffa01bd7d2>] xhci_hcd_cleanup+0xe/0x10 [xhci_hcd] [ 134.910652] [<ffffffff8107fcd1>] sys_delete_module+0x1ca/0x23b [ 134.911882] [<ffffffff81123932>] ? path_put+0x22/0x26 [ 134.913104] [<ffffffff8109a800>] ? audit_syscall_entry+0x2c/0x148 [ 134.914333] [<ffffffff8100ac82>] system_call_fastpath+0x16/0x1b [ 134.915658] xhci_hcd 0000:02:00.0: USB bus 3 deregistered [ 134.916465] xhci_hcd 0000:02:00.0: PCI INT A disabled and the same issue when xhci_suspend is invoked. (Note from Sarah: That's fixed by Andiry's patch before this, by synchronizing the irqs rather than freeing them on suspend.) Do not run xhci_cleanup_msix with irq disabled. This patch should be queued for the 2.6.37 stable tree. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org
2010-12-17 21:17:04 +00:00
xhci_cleanup_msix(xhci);
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
xhci_dbg(xhci, "xhci_shutdown completed - status = %x\n",
xhci_readl(xhci, &xhci->op_regs->status));
}
USB: xhci: Fix compile error when CONFIG_PM=n Fix this error when CONFIG_PM is not enabled: drivers/usb/host/xhci.c:675: error: implicit declaration of function 'usb_root_hub_lost_power' Wrap xhci_suspend() and xhci_resume() into an ifdef CONFIG_PM, along with the functions that only they call -- xhci_save_registers() and xhci_restore_registers(). Reported-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-15 18:24:14 +00:00
#ifdef CONFIG_PM
USB: xHCI: PCI power management implementation This patch implements the PCI suspend/resume. Please refer to xHCI spec for doing the suspend/resume operation. For S3, CSS/SRS in USBCMD is used to save/restore the internal state. However, an error maybe occurs while restoring the internal state. In this case, it means that HC internal state is wrong and HC will be re-initialized. Signed-off-by: Libin Yang <libin.yang@amd.com> Signed-off-by: Dong Nguyen <dong.nguyen@amd.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:23:06 +00:00
static void xhci_save_registers(struct xhci_hcd *xhci)
{
xhci->s3.command = xhci_readl(xhci, &xhci->op_regs->command);
xhci->s3.dev_nt = xhci_readl(xhci, &xhci->op_regs->dev_notification);
xhci->s3.dcbaa_ptr = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr);
xhci->s3.config_reg = xhci_readl(xhci, &xhci->op_regs->config_reg);
xhci->s3.irq_pending = xhci_readl(xhci, &xhci->ir_set->irq_pending);
xhci->s3.irq_control = xhci_readl(xhci, &xhci->ir_set->irq_control);
xhci->s3.erst_size = xhci_readl(xhci, &xhci->ir_set->erst_size);
xhci->s3.erst_base = xhci_read_64(xhci, &xhci->ir_set->erst_base);
xhci->s3.erst_dequeue = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue);
}
static void xhci_restore_registers(struct xhci_hcd *xhci)
{
xhci_writel(xhci, xhci->s3.command, &xhci->op_regs->command);
xhci_writel(xhci, xhci->s3.dev_nt, &xhci->op_regs->dev_notification);
xhci_write_64(xhci, xhci->s3.dcbaa_ptr, &xhci->op_regs->dcbaa_ptr);
xhci_writel(xhci, xhci->s3.config_reg, &xhci->op_regs->config_reg);
xhci_writel(xhci, xhci->s3.irq_pending, &xhci->ir_set->irq_pending);
xhci_writel(xhci, xhci->s3.irq_control, &xhci->ir_set->irq_control);
xhci_writel(xhci, xhci->s3.erst_size, &xhci->ir_set->erst_size);
xhci_write_64(xhci, xhci->s3.erst_base, &xhci->ir_set->erst_base);
}
xhci: Fix command ring replay after resume. Andiry's xHCI bus suspend patch introduced the possibly of a host controller replaying old commands on the command ring, if the host successfully restores the registers after a resume. After a resume from suspend, the xHCI driver must restore the registers, including the command ring pointer. I had suggested that Andiry set the command ring pointer to the current command ring dequeue pointer, so that the driver wouldn't have to zero the command ring. Unfortunately, setting the command ring pointer to the current dequeue pointer won't work because the register assumes the pointer is 64-byte aligned, and TRBs on the command ring are 16-byte aligned. The lower seven bits will always be masked off, leading to the written pointer being up to 3 TRBs behind the intended pointer. Here's a log excerpt. On init, the xHCI driver places a vendor-specific command on the command ring: [ 215.750958] xhci_hcd 0000:01:00.0: Vendor specific event TRB type = 48 [ 215.750960] xhci_hcd 0000:01:00.0: NEC firmware version 30.25 [ 215.750962] xhci_hcd 0000:01:00.0: Command ring deq = 0x3781e010 (DMA) When we resume, the command ring dequeue pointer to be written should have been 0x3781e010. Instead, it's 0x3781e000: [ 235.557846] xhci_hcd 0000:01:00.0: // Setting command ring address to 0x3781e001 [ 235.557848] xhci_hcd 0000:01:00.0: `MEM_WRITE_DWORD(3'b000, 64'hffffc900100bc038, 64'h3781e001, 4'hf); [ 235.557850] xhci_hcd 0000:01:00.0: `MEM_WRITE_DWORD(3'b000, 32'hffffc900100bc020, 32'h204, 4'hf); [ 235.557866] usb usb9: root hub lost power or was reset (I can't see the results of this bug because the xHCI restore always fails on this box, and the xHCI driver re-allocates everything.) The fix is to zero the command ring and put the software and hardware enqueue and dequeue pointer back to the beginning of the ring. We do this before the system suspends, to be paranoid and prevent the BIOS from starting the host without clearing the command ring pointer, which might cause the host to muck with stale memory. (The pointer isn't required to be in the suspend power well, but it could be.) The command ring pointer is set again after the host resumes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Tested-by: Andiry Xu <andiry.xu@amd.com>
2010-11-12 19:59:31 +00:00
static void xhci_set_cmd_ring_deq(struct xhci_hcd *xhci)
{
u64 val_64;
/* step 2: initialize command ring buffer */
val_64 = xhci_read_64(xhci, &xhci->op_regs->cmd_ring);
val_64 = (val_64 & (u64) CMD_RING_RSVD_BITS) |
(xhci_trb_virt_to_dma(xhci->cmd_ring->deq_seg,
xhci->cmd_ring->dequeue) &
(u64) ~CMD_RING_RSVD_BITS) |
xhci->cmd_ring->cycle_state;
xhci_dbg(xhci, "// Setting command ring address to 0x%llx\n",
(long unsigned long) val_64);
xhci_write_64(xhci, val_64, &xhci->op_regs->cmd_ring);
}
/*
* The whole command ring must be cleared to zero when we suspend the host.
*
* The host doesn't save the command ring pointer in the suspend well, so we
* need to re-program it on resume. Unfortunately, the pointer must be 64-byte
* aligned, because of the reserved bits in the command ring dequeue pointer
* register. Therefore, we can't just set the dequeue pointer back in the
* middle of the ring (TRBs are 16-byte aligned).
*/
static void xhci_clear_command_ring(struct xhci_hcd *xhci)
{
struct xhci_ring *ring;
struct xhci_segment *seg;
ring = xhci->cmd_ring;
seg = ring->deq_seg;
do {
memset(seg->trbs, 0, SEGMENT_SIZE);
seg = seg->next;
} while (seg != ring->deq_seg);
/* Reset the software enqueue and dequeue pointers */
ring->deq_seg = ring->first_seg;
ring->dequeue = ring->first_seg->trbs;
ring->enq_seg = ring->deq_seg;
ring->enqueue = ring->dequeue;
/*
* Ring is now zeroed, so the HW should look for change of ownership
* when the cycle bit is set to 1.
*/
ring->cycle_state = 1;
/*
* Reset the hardware dequeue pointer.
* Yes, this will need to be re-written after resume, but we're paranoid
* and want to make sure the hardware doesn't access bogus memory
* because, say, the BIOS or an SMI started the host without changing
* the command ring pointers.
*/
xhci_set_cmd_ring_deq(xhci);
}
USB: xHCI: PCI power management implementation This patch implements the PCI suspend/resume. Please refer to xHCI spec for doing the suspend/resume operation. For S3, CSS/SRS in USBCMD is used to save/restore the internal state. However, an error maybe occurs while restoring the internal state. In this case, it means that HC internal state is wrong and HC will be re-initialized. Signed-off-by: Libin Yang <libin.yang@amd.com> Signed-off-by: Dong Nguyen <dong.nguyen@amd.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:23:06 +00:00
/*
* Stop HC (not bus-specific)
*
* This is called when the machine transition into S3/S4 mode.
*
*/
int xhci_suspend(struct xhci_hcd *xhci)
{
int rc = 0;
struct usb_hcd *hcd = xhci_to_hcd(xhci);
u32 command;
xHCI: synchronize irq in xhci_suspend() Synchronize the interrupts instead of free them in xhci_suspend(). This will prevent a double free when the host is suspended and then the card removed. Set the flag hcd->msix_enabled when using MSI-X, and check the flag in suspend_common(). MSI-X synchronization will be handled by xhci_suspend(), and MSI/INTx will be synchronized in suspend_common(). This patch should be queued for the 2.6.37 stable tree. Reported-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org
2010-12-27 09:39:02 +00:00
int i;
USB: xHCI: PCI power management implementation This patch implements the PCI suspend/resume. Please refer to xHCI spec for doing the suspend/resume operation. For S3, CSS/SRS in USBCMD is used to save/restore the internal state. However, an error maybe occurs while restoring the internal state. In this case, it means that HC internal state is wrong and HC will be re-initialized. Signed-off-by: Libin Yang <libin.yang@amd.com> Signed-off-by: Dong Nguyen <dong.nguyen@amd.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:23:06 +00:00
spin_lock_irq(&xhci->lock);
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
/* step 1: stop endpoint */
/* skipped assuming that port suspend has done */
/* step 2: clear Run/Stop bit */
command = xhci_readl(xhci, &xhci->op_regs->command);
command &= ~CMD_RUN;
xhci_writel(xhci, command, &xhci->op_regs->command);
if (handshake(xhci, &xhci->op_regs->status,
STS_HALT, STS_HALT, 100*100)) {
xhci_warn(xhci, "WARN: xHC CMD_RUN timeout\n");
spin_unlock_irq(&xhci->lock);
return -ETIMEDOUT;
}
xhci: Fix command ring replay after resume. Andiry's xHCI bus suspend patch introduced the possibly of a host controller replaying old commands on the command ring, if the host successfully restores the registers after a resume. After a resume from suspend, the xHCI driver must restore the registers, including the command ring pointer. I had suggested that Andiry set the command ring pointer to the current command ring dequeue pointer, so that the driver wouldn't have to zero the command ring. Unfortunately, setting the command ring pointer to the current dequeue pointer won't work because the register assumes the pointer is 64-byte aligned, and TRBs on the command ring are 16-byte aligned. The lower seven bits will always be masked off, leading to the written pointer being up to 3 TRBs behind the intended pointer. Here's a log excerpt. On init, the xHCI driver places a vendor-specific command on the command ring: [ 215.750958] xhci_hcd 0000:01:00.0: Vendor specific event TRB type = 48 [ 215.750960] xhci_hcd 0000:01:00.0: NEC firmware version 30.25 [ 215.750962] xhci_hcd 0000:01:00.0: Command ring deq = 0x3781e010 (DMA) When we resume, the command ring dequeue pointer to be written should have been 0x3781e010. Instead, it's 0x3781e000: [ 235.557846] xhci_hcd 0000:01:00.0: // Setting command ring address to 0x3781e001 [ 235.557848] xhci_hcd 0000:01:00.0: `MEM_WRITE_DWORD(3'b000, 64'hffffc900100bc038, 64'h3781e001, 4'hf); [ 235.557850] xhci_hcd 0000:01:00.0: `MEM_WRITE_DWORD(3'b000, 32'hffffc900100bc020, 32'h204, 4'hf); [ 235.557866] usb usb9: root hub lost power or was reset (I can't see the results of this bug because the xHCI restore always fails on this box, and the xHCI driver re-allocates everything.) The fix is to zero the command ring and put the software and hardware enqueue and dequeue pointer back to the beginning of the ring. We do this before the system suspends, to be paranoid and prevent the BIOS from starting the host without clearing the command ring pointer, which might cause the host to muck with stale memory. (The pointer isn't required to be in the suspend power well, but it could be.) The command ring pointer is set again after the host resumes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Tested-by: Andiry Xu <andiry.xu@amd.com>
2010-11-12 19:59:31 +00:00
xhci_clear_command_ring(xhci);
USB: xHCI: PCI power management implementation This patch implements the PCI suspend/resume. Please refer to xHCI spec for doing the suspend/resume operation. For S3, CSS/SRS in USBCMD is used to save/restore the internal state. However, an error maybe occurs while restoring the internal state. In this case, it means that HC internal state is wrong and HC will be re-initialized. Signed-off-by: Libin Yang <libin.yang@amd.com> Signed-off-by: Dong Nguyen <dong.nguyen@amd.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:23:06 +00:00
/* step 3: save registers */
xhci_save_registers(xhci);
/* step 4: set CSS flag */
command = xhci_readl(xhci, &xhci->op_regs->command);
command |= CMD_CSS;
xhci_writel(xhci, command, &xhci->op_regs->command);
if (handshake(xhci, &xhci->op_regs->status, STS_SAVE, 0, 10*100)) {
xhci_warn(xhci, "WARN: xHC CMD_CSS timeout\n");
spin_unlock_irq(&xhci->lock);
return -ETIMEDOUT;
}
spin_unlock_irq(&xhci->lock);
xHCI: synchronize irq in xhci_suspend() Synchronize the interrupts instead of free them in xhci_suspend(). This will prevent a double free when the host is suspended and then the card removed. Set the flag hcd->msix_enabled when using MSI-X, and check the flag in suspend_common(). MSI-X synchronization will be handled by xhci_suspend(), and MSI/INTx will be synchronized in suspend_common(). This patch should be queued for the 2.6.37 stable tree. Reported-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org
2010-12-27 09:39:02 +00:00
/* step 5: remove core well power */
/* synchronize irq when using MSI-X */
if (xhci->msix_entries) {
for (i = 0; i < xhci->msix_count; i++)
synchronize_irq(xhci->msix_entries[i].vector);
}
USB: xHCI: PCI power management implementation This patch implements the PCI suspend/resume. Please refer to xHCI spec for doing the suspend/resume operation. For S3, CSS/SRS in USBCMD is used to save/restore the internal state. However, an error maybe occurs while restoring the internal state. In this case, it means that HC internal state is wrong and HC will be re-initialized. Signed-off-by: Libin Yang <libin.yang@amd.com> Signed-off-by: Dong Nguyen <dong.nguyen@amd.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:23:06 +00:00
return rc;
}
/*
* start xHC (not bus-specific)
*
* This is called when the machine transition from S3/S4 mode.
*
*/
int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
{
u32 command, temp = 0;
struct usb_hcd *hcd = xhci_to_hcd(xhci);
int old_state, retval;
old_state = hcd->state;
if (time_before(jiffies, xhci->next_statechange))
msleep(100);
spin_lock_irq(&xhci->lock);
if (!hibernated) {
/* step 1: restore register */
xhci_restore_registers(xhci);
/* step 2: initialize command ring buffer */
xhci: Fix command ring replay after resume. Andiry's xHCI bus suspend patch introduced the possibly of a host controller replaying old commands on the command ring, if the host successfully restores the registers after a resume. After a resume from suspend, the xHCI driver must restore the registers, including the command ring pointer. I had suggested that Andiry set the command ring pointer to the current command ring dequeue pointer, so that the driver wouldn't have to zero the command ring. Unfortunately, setting the command ring pointer to the current dequeue pointer won't work because the register assumes the pointer is 64-byte aligned, and TRBs on the command ring are 16-byte aligned. The lower seven bits will always be masked off, leading to the written pointer being up to 3 TRBs behind the intended pointer. Here's a log excerpt. On init, the xHCI driver places a vendor-specific command on the command ring: [ 215.750958] xhci_hcd 0000:01:00.0: Vendor specific event TRB type = 48 [ 215.750960] xhci_hcd 0000:01:00.0: NEC firmware version 30.25 [ 215.750962] xhci_hcd 0000:01:00.0: Command ring deq = 0x3781e010 (DMA) When we resume, the command ring dequeue pointer to be written should have been 0x3781e010. Instead, it's 0x3781e000: [ 235.557846] xhci_hcd 0000:01:00.0: // Setting command ring address to 0x3781e001 [ 235.557848] xhci_hcd 0000:01:00.0: `MEM_WRITE_DWORD(3'b000, 64'hffffc900100bc038, 64'h3781e001, 4'hf); [ 235.557850] xhci_hcd 0000:01:00.0: `MEM_WRITE_DWORD(3'b000, 32'hffffc900100bc020, 32'h204, 4'hf); [ 235.557866] usb usb9: root hub lost power or was reset (I can't see the results of this bug because the xHCI restore always fails on this box, and the xHCI driver re-allocates everything.) The fix is to zero the command ring and put the software and hardware enqueue and dequeue pointer back to the beginning of the ring. We do this before the system suspends, to be paranoid and prevent the BIOS from starting the host without clearing the command ring pointer, which might cause the host to muck with stale memory. (The pointer isn't required to be in the suspend power well, but it could be.) The command ring pointer is set again after the host resumes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Tested-by: Andiry Xu <andiry.xu@amd.com>
2010-11-12 19:59:31 +00:00
xhci_set_cmd_ring_deq(xhci);
USB: xHCI: PCI power management implementation This patch implements the PCI suspend/resume. Please refer to xHCI spec for doing the suspend/resume operation. For S3, CSS/SRS in USBCMD is used to save/restore the internal state. However, an error maybe occurs while restoring the internal state. In this case, it means that HC internal state is wrong and HC will be re-initialized. Signed-off-by: Libin Yang <libin.yang@amd.com> Signed-off-by: Dong Nguyen <dong.nguyen@amd.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:23:06 +00:00
/* step 3: restore state and start state*/
/* step 3: set CRS flag */
command = xhci_readl(xhci, &xhci->op_regs->command);
command |= CMD_CRS;
xhci_writel(xhci, command, &xhci->op_regs->command);
if (handshake(xhci, &xhci->op_regs->status,
STS_RESTORE, 0, 10*100)) {
xhci_dbg(xhci, "WARN: xHC CMD_CSS timeout\n");
spin_unlock_irq(&xhci->lock);
return -ETIMEDOUT;
}
temp = xhci_readl(xhci, &xhci->op_regs->status);
}
/* If restore operation fails, re-initialize the HC during resume */
if ((temp & STS_SRE) || hibernated) {
usb_root_hub_lost_power(hcd->self.root_hub);
xhci_dbg(xhci, "Stop HCD\n");
xhci_halt(xhci);
xhci_reset(xhci);
spin_unlock_irq(&xhci->lock);
xHCI: synchronize irq in xhci_suspend() Synchronize the interrupts instead of free them in xhci_suspend(). This will prevent a double free when the host is suspended and then the card removed. Set the flag hcd->msix_enabled when using MSI-X, and check the flag in suspend_common(). MSI-X synchronization will be handled by xhci_suspend(), and MSI/INTx will be synchronized in suspend_common(). This patch should be queued for the 2.6.37 stable tree. Reported-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org
2010-12-27 09:39:02 +00:00
xhci_cleanup_msix(xhci);
USB: xHCI: PCI power management implementation This patch implements the PCI suspend/resume. Please refer to xHCI spec for doing the suspend/resume operation. For S3, CSS/SRS in USBCMD is used to save/restore the internal state. However, an error maybe occurs while restoring the internal state. In this case, it means that HC internal state is wrong and HC will be re-initialized. Signed-off-by: Libin Yang <libin.yang@amd.com> Signed-off-by: Dong Nguyen <dong.nguyen@amd.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:23:06 +00:00
#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
/* Tell the event ring poll function not to reschedule */
xhci->zombie = 1;
del_timer_sync(&xhci->event_ring_timer);
#endif
xhci_dbg(xhci, "// Disabling event ring interrupts\n");
temp = xhci_readl(xhci, &xhci->op_regs->status);
xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status);
temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
xhci_writel(xhci, ER_IRQ_DISABLE(temp),
&xhci->ir_set->irq_pending);
xhci_print_ir_set(xhci, xhci->ir_set, 0);
xhci_dbg(xhci, "cleaning up memory\n");
xhci_mem_cleanup(xhci);
xhci_dbg(xhci, "xhci_stop completed - status = %x\n",
xhci_readl(xhci, &xhci->op_regs->status));
xhci_dbg(xhci, "Initialize the HCD\n");
retval = xhci_init(hcd);
if (retval)
return retval;
xhci_dbg(xhci, "Start the HCD\n");
retval = xhci_run(hcd);
if (!retval)
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
hcd->state = HC_STATE_SUSPENDED;
return retval;
}
/* step 4: set Run/Stop bit */
command = xhci_readl(xhci, &xhci->op_regs->command);
command |= CMD_RUN;
xhci_writel(xhci, command, &xhci->op_regs->command);
handshake(xhci, &xhci->op_regs->status, STS_HALT,
0, 250 * 1000);
/* step 5: walk topology and initialize portsc,
* portpmsc and portli
*/
/* this is done in bus_resume */
/* step 6: restart each of the previously
* Running endpoints by ringing their doorbells
*/
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
if (!hibernated)
hcd->state = old_state;
else
hcd->state = HC_STATE_SUSPENDED;
spin_unlock_irq(&xhci->lock);
return 0;
}
USB: xhci: Fix compile error when CONFIG_PM=n Fix this error when CONFIG_PM is not enabled: drivers/usb/host/xhci.c:675: error: implicit declaration of function 'usb_root_hub_lost_power' Wrap xhci_suspend() and xhci_resume() into an ifdef CONFIG_PM, along with the functions that only they call -- xhci_save_registers() and xhci_restore_registers(). Reported-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-15 18:24:14 +00:00
#endif /* CONFIG_PM */
USB: xhci: No-op command queueing and irq handler. xHCI host controllers can optionally implement a no-op test. This simple test ensures the OS has correctly setup all basic data structures and can correctly respond to interrupts from the host controller hardware. There are two rings exercised by the no-op test: the command ring, and the event ring. The host controller driver writes a no-op command TRB to the command ring, and rings the doorbell for the command ring (the first entry in the doorbell array). The hardware receives this event, places a command completion event on the event ring, and fires an interrupt. The host controller driver sees the interrupt, and checks the event ring for TRBs it can process, and sees the command completion event. (See the rules in xhci-ring.c for who "owns" a TRB. This is a simplified set of rules, and may not contain all the details that are in the xHCI 0.95 spec.) A timer fires every 60 seconds to debug the state of the hardware and command and event rings. This timer only runs if CONFIG_USB_XHCI_HCD_DEBUGGING is 'y'. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:53:56 +00:00
/*-------------------------------------------------------------------------*/
USB: xhci: Control transfer support. Allow device drivers to enqueue URBs to control endpoints on devices under an xHCI host controller. Each control transfer is represented by a series of Transfer Descriptors (TDs) written to an endpoint ring. There is one TD for the Setup phase, (optionally) one TD for the Data phase, and one TD for the Status phase. Enqueue these TDs onto the endpoint ring that represents the control endpoint. The host controller hardware will return an event on the event ring that points to the (DMA) address of one of the TDs on the endpoint ring. If the transfer was successful, the transfer event TRB will have a completion code of success, and it will point to the Status phase TD. Anything else is considered an error. This should work for control endpoints besides the default endpoint, but that hasn't been tested. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:01 +00:00
/**
* xhci_get_endpoint_index - Used for passing endpoint bitmasks between the core and
* HCDs. Find the index for an endpoint given its descriptor. Use the return
* value to right shift 1 for the bitmask.
*
* Index = (epnum * 2) + direction - 1,
* where direction = 0 for OUT, 1 for IN.
* For control endpoints, the IN index is used (OUT index is unused), so
* index = (epnum * 2) + direction - 1 = (epnum * 2) + 1 - 1 = (epnum * 2)
*/
unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc)
{
unsigned int index;
if (usb_endpoint_xfer_control(desc))
index = (unsigned int) (usb_endpoint_num(desc)*2);
else
index = (unsigned int) (usb_endpoint_num(desc)*2) +
(usb_endpoint_dir_in(desc) ? 1 : 0) - 1;
return index;
}
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
/* Find the flag for this endpoint (for use in the control context). Use the
* endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is
* bit 1, etc.
*/
unsigned int xhci_get_endpoint_flag(struct usb_endpoint_descriptor *desc)
{
return 1 << (xhci_get_endpoint_index(desc) + 1);
}
USB: xhci: Add quirk for Fresco Logic xHCI hardware. This Fresco Logic xHCI host controller chip revision puts bad data into the output endpoint context after a Reset Endpoint command. It needs a Configure Endpoint command (instead of a Set TR Dequeue Pointer command) after the reset endpoint command. Set up the input context before issuing the Reset Endpoint command so we don't copy bad data from the output endpoint context. The HW also can't handle two commands queued at once, so submit the TRB for the Configure Endpoint command in the event handler for the Reset Endpoint command. Devices that stall on control endpoints before a configuration is selected will not work under this Fresco Logic xHCI host controller revision. This patch is for prototype hardware that will be given to other companies for evaluation purposes only, and should not reach consumer hands. Fresco Logic's next chip rev should have this bug fixed. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:55 +00:00
/* Find the flag for this endpoint (for use in the control context). Use the
* endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is
* bit 1, etc.
*/
unsigned int xhci_get_endpoint_flag_from_index(unsigned int ep_index)
{
return 1 << (ep_index + 1);
}
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
/* Compute the last valid endpoint context index. Basically, this is the
* endpoint index plus one. For slot contexts with more than valid endpoint,
* we find the most significant bit set in the added contexts flags.
* e.g. ep 1 IN (with epnum 0x81) => added_ctxs = 0b1000
* fls(0b1000) = 4, but the endpoint context index is 3, so subtract one.
*/
USB: xhci: Add quirk for Fresco Logic xHCI hardware. This Fresco Logic xHCI host controller chip revision puts bad data into the output endpoint context after a Reset Endpoint command. It needs a Configure Endpoint command (instead of a Set TR Dequeue Pointer command) after the reset endpoint command. Set up the input context before issuing the Reset Endpoint command so we don't copy bad data from the output endpoint context. The HW also can't handle two commands queued at once, so submit the TRB for the Configure Endpoint command in the event handler for the Reset Endpoint command. Devices that stall on control endpoints before a configuration is selected will not work under this Fresco Logic xHCI host controller revision. This patch is for prototype hardware that will be given to other companies for evaluation purposes only, and should not reach consumer hands. Fresco Logic's next chip rev should have this bug fixed. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:55 +00:00
unsigned int xhci_last_valid_endpoint(u32 added_ctxs)
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
{
return fls(added_ctxs) - 1;
}
USB: xhci: Control transfer support. Allow device drivers to enqueue URBs to control endpoints on devices under an xHCI host controller. Each control transfer is represented by a series of Transfer Descriptors (TDs) written to an endpoint ring. There is one TD for the Setup phase, (optionally) one TD for the Data phase, and one TD for the Status phase. Enqueue these TDs onto the endpoint ring that represents the control endpoint. The host controller hardware will return an event on the event ring that points to the (DMA) address of one of the TDs on the endpoint ring. If the transfer was successful, the transfer event TRB will have a completion code of success, and it will point to the Status phase TD. Anything else is considered an error. This should work for control endpoints besides the default endpoint, but that hasn't been tested. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:01 +00:00
/* Returns 1 if the arguments are OK;
* returns 0 this is a root hub; returns -EINVAL for NULL pointers.
*/
int xhci_check_args(struct usb_hcd *hcd, struct usb_device *udev,
USB: xHCI: Add pointer to udev in struct xhci_virt_device Add a pointer to udev in struct xhci_virt_device. When allocate a new virt_device, make the pointer point to the corresponding udev. Modify xhci_check_args(), check if virt_dev->udev matches the target udev, to make sure command is issued to the right device. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:45 +00:00
struct usb_host_endpoint *ep, int check_ep, bool check_virt_dev,
const char *func) {
struct xhci_hcd *xhci;
struct xhci_virt_device *virt_dev;
USB: xhci: Control transfer support. Allow device drivers to enqueue URBs to control endpoints on devices under an xHCI host controller. Each control transfer is represented by a series of Transfer Descriptors (TDs) written to an endpoint ring. There is one TD for the Setup phase, (optionally) one TD for the Data phase, and one TD for the Status phase. Enqueue these TDs onto the endpoint ring that represents the control endpoint. The host controller hardware will return an event on the event ring that points to the (DMA) address of one of the TDs on the endpoint ring. If the transfer was successful, the transfer event TRB will have a completion code of success, and it will point to the Status phase TD. Anything else is considered an error. This should work for control endpoints besides the default endpoint, but that hasn't been tested. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:01 +00:00
if (!hcd || (check_ep && !ep) || !udev) {
printk(KERN_DEBUG "xHCI %s called with invalid args\n",
func);
return -EINVAL;
}
if (!udev->parent) {
printk(KERN_DEBUG "xHCI %s called for root hub\n",
func);
return 0;
}
USB: xHCI: Add pointer to udev in struct xhci_virt_device Add a pointer to udev in struct xhci_virt_device. When allocate a new virt_device, make the pointer point to the corresponding udev. Modify xhci_check_args(), check if virt_dev->udev matches the target udev, to make sure command is issued to the right device. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:45 +00:00
if (check_virt_dev) {
xhci = hcd_to_xhci(hcd);
if (!udev->slot_id || !xhci->devs
|| !xhci->devs[udev->slot_id]) {
printk(KERN_DEBUG "xHCI %s called with unaddressed "
"device\n", func);
return -EINVAL;
}
virt_dev = xhci->devs[udev->slot_id];
if (virt_dev->udev != udev) {
printk(KERN_DEBUG "xHCI %s called with udev and "
"virt_dev does not match\n", func);
return -EINVAL;
}
USB: xhci: Control transfer support. Allow device drivers to enqueue URBs to control endpoints on devices under an xHCI host controller. Each control transfer is represented by a series of Transfer Descriptors (TDs) written to an endpoint ring. There is one TD for the Setup phase, (optionally) one TD for the Data phase, and one TD for the Status phase. Enqueue these TDs onto the endpoint ring that represents the control endpoint. The host controller hardware will return an event on the event ring that points to the (DMA) address of one of the TDs on the endpoint ring. If the transfer was successful, the transfer event TRB will have a completion code of success, and it will point to the Status phase TD. Anything else is considered an error. This should work for control endpoints besides the default endpoint, but that hasn't been tested. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:01 +00:00
}
USB: xHCI: Add pointer to udev in struct xhci_virt_device Add a pointer to udev in struct xhci_virt_device. When allocate a new virt_device, make the pointer point to the corresponding udev. Modify xhci_check_args(), check if virt_dev->udev matches the target udev, to make sure command is issued to the right device. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:45 +00:00
USB: xhci: Control transfer support. Allow device drivers to enqueue URBs to control endpoints on devices under an xHCI host controller. Each control transfer is represented by a series of Transfer Descriptors (TDs) written to an endpoint ring. There is one TD for the Setup phase, (optionally) one TD for the Data phase, and one TD for the Status phase. Enqueue these TDs onto the endpoint ring that represents the control endpoint. The host controller hardware will return an event on the event ring that points to the (DMA) address of one of the TDs on the endpoint ring. If the transfer was successful, the transfer event TRB will have a completion code of success, and it will point to the Status phase TD. Anything else is considered an error. This should work for control endpoints besides the default endpoint, but that hasn't been tested. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:01 +00:00
return 1;
}
USB: xhci: Support full speed devices. Full speed devices have varying max packet sizes (8, 16, 32, or 64) for endpoint 0. The xHCI hardware needs to know the real max packet size that the USB core discovers after it fetches the first 8 bytes of the device descriptor. In order to fix this without adding a new hook to host controller drivers, the xHCI driver looks for an updated max packet size for control endpoints. If it finds an updated size, it issues an evaluate context command and waits for that command to finish. This should only happen in the initialization and device descriptor fetching steps in the khubd thread, so blocking should be fine. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:49 +00:00
static int xhci_configure_endpoint(struct xhci_hcd *xhci,
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
struct usb_device *udev, struct xhci_command *command,
bool ctx_change, bool must_succeed);
USB: xhci: Support full speed devices. Full speed devices have varying max packet sizes (8, 16, 32, or 64) for endpoint 0. The xHCI hardware needs to know the real max packet size that the USB core discovers after it fetches the first 8 bytes of the device descriptor. In order to fix this without adding a new hook to host controller drivers, the xHCI driver looks for an updated max packet size for control endpoints. If it finds an updated size, it issues an evaluate context command and waits for that command to finish. This should only happen in the initialization and device descriptor fetching steps in the khubd thread, so blocking should be fine. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:49 +00:00
/*
* Full speed devices may have a max packet size greater than 8 bytes, but the
* USB core doesn't know that until it reads the first 8 bytes of the
* descriptor. If the usb_device's max packet size changes after that point,
* we need to issue an evaluate context command and wait on it.
*/
static int xhci_check_maxpacket(struct xhci_hcd *xhci, unsigned int slot_id,
unsigned int ep_index, struct urb *urb)
{
struct xhci_container_ctx *in_ctx;
struct xhci_container_ctx *out_ctx;
struct xhci_input_control_ctx *ctrl_ctx;
struct xhci_ep_ctx *ep_ctx;
int max_packet_size;
int hw_max_packet_size;
int ret = 0;
out_ctx = xhci->devs[slot_id]->out_ctx;
ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index);
hw_max_packet_size = MAX_PACKET_DECODED(ep_ctx->ep_info2);
max_packet_size = urb->dev->ep0.desc.wMaxPacketSize;
if (hw_max_packet_size != max_packet_size) {
xhci_dbg(xhci, "Max Packet Size for ep 0 changed.\n");
xhci_dbg(xhci, "Max packet size in usb_device = %d\n",
max_packet_size);
xhci_dbg(xhci, "Max packet size in xHCI HW = %d\n",
hw_max_packet_size);
xhci_dbg(xhci, "Issuing evaluate context command.\n");
/* Set up the modified control endpoint 0 */
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx,
xhci->devs[slot_id]->out_ctx, ep_index);
USB: xhci: Support full speed devices. Full speed devices have varying max packet sizes (8, 16, 32, or 64) for endpoint 0. The xHCI hardware needs to know the real max packet size that the USB core discovers after it fetches the first 8 bytes of the device descriptor. In order to fix this without adding a new hook to host controller drivers, the xHCI driver looks for an updated max packet size for control endpoints. If it finds an updated size, it issues an evaluate context command and waits for that command to finish. This should only happen in the initialization and device descriptor fetching steps in the khubd thread, so blocking should be fine. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:49 +00:00
in_ctx = xhci->devs[slot_id]->in_ctx;
ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index);
ep_ctx->ep_info2 &= ~MAX_PACKET_MASK;
ep_ctx->ep_info2 |= MAX_PACKET(max_packet_size);
/* Set up the input context flags for the command */
/* FIXME: This won't work if a non-default control endpoint
* changes max packet sizes.
*/
ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx);
ctrl_ctx->add_flags = EP0_FLAG;
ctrl_ctx->drop_flags = 0;
xhci_dbg(xhci, "Slot %d input context\n", slot_id);
xhci_dbg_ctx(xhci, in_ctx, ep_index);
xhci_dbg(xhci, "Slot %d output context\n", slot_id);
xhci_dbg_ctx(xhci, out_ctx, ep_index);
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
ret = xhci_configure_endpoint(xhci, urb->dev, NULL,
true, false);
USB: xhci: Support full speed devices. Full speed devices have varying max packet sizes (8, 16, 32, or 64) for endpoint 0. The xHCI hardware needs to know the real max packet size that the USB core discovers after it fetches the first 8 bytes of the device descriptor. In order to fix this without adding a new hook to host controller drivers, the xHCI driver looks for an updated max packet size for control endpoints. If it finds an updated size, it issues an evaluate context command and waits for that command to finish. This should only happen in the initialization and device descriptor fetching steps in the khubd thread, so blocking should be fine. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:49 +00:00
/* Clean up the input context for later use by bandwidth
* functions.
*/
ctrl_ctx->add_flags = SLOT_FLAG;
}
return ret;
}
USB: xhci: Control transfer support. Allow device drivers to enqueue URBs to control endpoints on devices under an xHCI host controller. Each control transfer is represented by a series of Transfer Descriptors (TDs) written to an endpoint ring. There is one TD for the Setup phase, (optionally) one TD for the Data phase, and one TD for the Status phase. Enqueue these TDs onto the endpoint ring that represents the control endpoint. The host controller hardware will return an event on the event ring that points to the (DMA) address of one of the TDs on the endpoint ring. If the transfer was successful, the transfer event TRB will have a completion code of success, and it will point to the Status phase TD. Anything else is considered an error. This should work for control endpoints besides the default endpoint, but that hasn't been tested. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:01 +00:00
/*
* non-error returns are a promise to giveback() the urb later
* we drop ownership so next owner (or urb unlink) can get it
*/
int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
unsigned long flags;
int ret = 0;
unsigned int slot_id, ep_index;
USB: xHCI: Introduce urb_priv structure Add urb_priv data structure to xHCI driver. This structure allows multiple xhci TDs to be linked to one urb, which is essential for isochronous transfer. For non-isochronous urb, only one TD is needed for one urb; for isochronous urb, the TD number for the urb is equal to urb->number_of_packets. The length field of urb_priv indicates the number of TDs in the urb. The td_cnt field indicates the number of TDs already processed by xHC. When td_cnt matches length, the urb can be given back to usbcore. When an urb is dequeued or cancelled, add all the unprocessed TDs to the endpoint's cancelled_td_list. When process a cancelled TD, increase td_cnt field. When td_cnt equals urb_priv->length, giveback the cancelled urb. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-22 22:23:31 +00:00
struct urb_priv *urb_priv;
int size, i;
USB: xhci: Support full speed devices. Full speed devices have varying max packet sizes (8, 16, 32, or 64) for endpoint 0. The xHCI hardware needs to know the real max packet size that the USB core discovers after it fetches the first 8 bytes of the device descriptor. In order to fix this without adding a new hook to host controller drivers, the xHCI driver looks for an updated max packet size for control endpoints. If it finds an updated size, it issues an evaluate context command and waits for that command to finish. This should only happen in the initialization and device descriptor fetching steps in the khubd thread, so blocking should be fine. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:49 +00:00
USB: xHCI: Add pointer to udev in struct xhci_virt_device Add a pointer to udev in struct xhci_virt_device. When allocate a new virt_device, make the pointer point to the corresponding udev. Modify xhci_check_args(), check if virt_dev->udev matches the target udev, to make sure command is issued to the right device. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:45 +00:00
if (!urb || xhci_check_args(hcd, urb->dev, urb->ep,
true, true, __func__) <= 0)
USB: xhci: Control transfer support. Allow device drivers to enqueue URBs to control endpoints on devices under an xHCI host controller. Each control transfer is represented by a series of Transfer Descriptors (TDs) written to an endpoint ring. There is one TD for the Setup phase, (optionally) one TD for the Data phase, and one TD for the Status phase. Enqueue these TDs onto the endpoint ring that represents the control endpoint. The host controller hardware will return an event on the event ring that points to the (DMA) address of one of the TDs on the endpoint ring. If the transfer was successful, the transfer event TRB will have a completion code of success, and it will point to the Status phase TD. Anything else is considered an error. This should work for control endpoints besides the default endpoint, but that hasn't been tested. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:01 +00:00
return -EINVAL;
slot_id = urb->dev->slot_id;
ep_index = xhci_get_endpoint_index(&urb->ep->desc);
USB: convert usb_hcd bitfields into atomic flags This patch (as1393) converts several of the single-bit fields in struct usb_hcd to atomic flags. This is for safety's sake; not all CPUs can update bitfield values atomically, and these flags are used in multiple contexts. The flag fields that are set only during registration or removal can remain as they are, since non-atomic accesses at those times will not cause any problems. (Strictly speaking, the authorized_default flag should become atomic as well. I didn't bother with it because it gets changed only via sysfs. It can be done later, if anyone wants.) Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-06-22 20:39:10 +00:00
if (!HCD_HW_ACCESSIBLE(hcd)) {
USB: xhci: Control transfer support. Allow device drivers to enqueue URBs to control endpoints on devices under an xHCI host controller. Each control transfer is represented by a series of Transfer Descriptors (TDs) written to an endpoint ring. There is one TD for the Setup phase, (optionally) one TD for the Data phase, and one TD for the Status phase. Enqueue these TDs onto the endpoint ring that represents the control endpoint. The host controller hardware will return an event on the event ring that points to the (DMA) address of one of the TDs on the endpoint ring. If the transfer was successful, the transfer event TRB will have a completion code of success, and it will point to the Status phase TD. Anything else is considered an error. This should work for control endpoints besides the default endpoint, but that hasn't been tested. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:01 +00:00
if (!in_interrupt())
xhci_dbg(xhci, "urb submitted during PCI suspend\n");
ret = -ESHUTDOWN;
goto exit;
}
USB: xHCI: Introduce urb_priv structure Add urb_priv data structure to xHCI driver. This structure allows multiple xhci TDs to be linked to one urb, which is essential for isochronous transfer. For non-isochronous urb, only one TD is needed for one urb; for isochronous urb, the TD number for the urb is equal to urb->number_of_packets. The length field of urb_priv indicates the number of TDs in the urb. The td_cnt field indicates the number of TDs already processed by xHC. When td_cnt matches length, the urb can be given back to usbcore. When an urb is dequeued or cancelled, add all the unprocessed TDs to the endpoint's cancelled_td_list. When process a cancelled TD, increase td_cnt field. When td_cnt equals urb_priv->length, giveback the cancelled urb. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-22 22:23:31 +00:00
if (usb_endpoint_xfer_isoc(&urb->ep->desc))
size = urb->number_of_packets;
else
size = 1;
urb_priv = kzalloc(sizeof(struct urb_priv) +
size * sizeof(struct xhci_td *), mem_flags);
if (!urb_priv)
return -ENOMEM;
for (i = 0; i < size; i++) {
urb_priv->td[i] = kzalloc(sizeof(struct xhci_td), mem_flags);
if (!urb_priv->td[i]) {
urb_priv->length = i;
xhci_urb_free_priv(xhci, urb_priv);
return -ENOMEM;
}
}
urb_priv->length = size;
urb_priv->td_cnt = 0;
urb->hcpriv = urb_priv;
USB: xhci: Support full speed devices. Full speed devices have varying max packet sizes (8, 16, 32, or 64) for endpoint 0. The xHCI hardware needs to know the real max packet size that the USB core discovers after it fetches the first 8 bytes of the device descriptor. In order to fix this without adding a new hook to host controller drivers, the xHCI driver looks for an updated max packet size for control endpoints. If it finds an updated size, it issues an evaluate context command and waits for that command to finish. This should only happen in the initialization and device descriptor fetching steps in the khubd thread, so blocking should be fine. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:49 +00:00
if (usb_endpoint_xfer_control(&urb->ep->desc)) {
/* Check to see if the max packet size for the default control
* endpoint changed during FS device enumeration
*/
if (urb->dev->speed == USB_SPEED_FULL) {
ret = xhci_check_maxpacket(xhci, slot_id,
ep_index, urb);
if (ret < 0)
return ret;
}
USB: xhci: Use GFP_ATOMIC while holding spinlocks. The xHCI functions to queue an URB onto the hardware rings must be called with the xhci spinlock held. Those functions will allocate memory, and take a gfp_t memory flags argument. We must pass them the GFP_ATOMIC flag, since we don't want the memory allocation to attempt to sleep while waiting for more memory to become available. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:23 +00:00
/* We have a spinlock and interrupts disabled, so we must pass
* atomic context to this function, which may allocate memory.
*/
USB: xhci: Support full speed devices. Full speed devices have varying max packet sizes (8, 16, 32, or 64) for endpoint 0. The xHCI hardware needs to know the real max packet size that the USB core discovers after it fetches the first 8 bytes of the device descriptor. In order to fix this without adding a new hook to host controller drivers, the xHCI driver looks for an updated max packet size for control endpoints. If it finds an updated size, it issues an evaluate context command and waits for that command to finish. This should only happen in the initialization and device descriptor fetching steps in the khubd thread, so blocking should be fine. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:49 +00:00
spin_lock_irqsave(&xhci->lock, flags);
USB: xhci: Add watchdog timer for URB cancellation. In order to giveback a canceled URB, we must ensure that the xHCI hardware will not access the buffer in an URB. We can't modify the buffer pointers on endpoint rings without issuing and waiting for a stop endpoint command. Since URBs can be canceled in interrupt context, we can't wait on that command. The old code trusted that the host controller would respond to the command, and would giveback the URBs in the event handler. If the hardware never responds to the stop endpoint command, the URBs will never be completed, and we might hang the USB subsystem. Implement a watchdog timer that is spawned whenever a stop endpoint command is queued. If a stop endpoint command event is found on the event ring during an interrupt, we need to stop the watchdog timer with del_timer(). Since del_timer() can fail if the timer is running and waiting on the xHCI lock, we need a way to signal to the timer that everything is fine and it should exit. If we simply clear EP_HALT_PENDING, a new stop endpoint command could sneak in and set it before the watchdog timer can grab the lock. Instead we use a combination of the EP_HALT_PENDING flag and a counter for the number of pending stop endpoint commands (xhci_virt_ep->stop_cmds_pending). If we need to cancel the watchdog timer and del_timer() succeeds, we decrement the number of pending stop endpoint commands. If del_timer() fails, we leave the number of pending stop endpoint commands alone. In either case, we clear the EP_HALT_PENDING flag. The timer will decrement the number of pending stop endpoint commands once it obtains the lock. If the timer is the tail end of the last stop endpoint command (xhci_virt_ep->stop_cmds_pending == 0), and the endpoint's command is still pending (EP_HALT_PENDING is set), we assume the host is dying. The watchdog timer will set XHCI_STATE_DYING, try to halt the xHCI host, and give back all pending URBs. Various other places in the driver need to check whether the xHCI host is dying. If the interrupt handler ever notices, it should immediately stop processing events. The URB enqueue function should also return -ESHUTDOWN. The URB dequeue function should simply return the value of usb_hcd_check_unlink_urb() and the watchdog timer will take care of giving the URB back. When a device is disconnected, the xHCI hardware structures should be freed without issuing a disable slot command (since the hardware probably won't respond to it anyway). The debugging polling loop should stop polling if the host is dying. When a device is disconnected, any pending watchdog timers are killed with del_timer_sync(). It must be synchronous so that the watchdog timer doesn't attempt to access the freed endpoint structures. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:57:01 +00:00
if (xhci->xhc_state & XHCI_STATE_DYING)
goto dying;
USB: xhci: Use GFP_ATOMIC while holding spinlocks. The xHCI functions to queue an URB onto the hardware rings must be called with the xhci spinlock held. Those functions will allocate memory, and take a gfp_t memory flags argument. We must pass them the GFP_ATOMIC flag, since we don't want the memory allocation to attempt to sleep while waiting for more memory to become available. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:23 +00:00
ret = xhci_queue_ctrl_tx(xhci, GFP_ATOMIC, urb,
USB: xhci: Avoid global namespace pollution. Make all globally visible functions start with xhci_ and mark functions as static if they're only called within the same C file. Fix some long lines while we're at it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:05:20 +00:00
slot_id, ep_index);
USB: xhci: Support full speed devices. Full speed devices have varying max packet sizes (8, 16, 32, or 64) for endpoint 0. The xHCI hardware needs to know the real max packet size that the USB core discovers after it fetches the first 8 bytes of the device descriptor. In order to fix this without adding a new hook to host controller drivers, the xHCI driver looks for an updated max packet size for control endpoints. If it finds an updated size, it issues an evaluate context command and waits for that command to finish. This should only happen in the initialization and device descriptor fetching steps in the khubd thread, so blocking should be fine. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:49 +00:00
spin_unlock_irqrestore(&xhci->lock, flags);
} else if (usb_endpoint_xfer_bulk(&urb->ep->desc)) {
spin_lock_irqsave(&xhci->lock, flags);
USB: xhci: Add watchdog timer for URB cancellation. In order to giveback a canceled URB, we must ensure that the xHCI hardware will not access the buffer in an URB. We can't modify the buffer pointers on endpoint rings without issuing and waiting for a stop endpoint command. Since URBs can be canceled in interrupt context, we can't wait on that command. The old code trusted that the host controller would respond to the command, and would giveback the URBs in the event handler. If the hardware never responds to the stop endpoint command, the URBs will never be completed, and we might hang the USB subsystem. Implement a watchdog timer that is spawned whenever a stop endpoint command is queued. If a stop endpoint command event is found on the event ring during an interrupt, we need to stop the watchdog timer with del_timer(). Since del_timer() can fail if the timer is running and waiting on the xHCI lock, we need a way to signal to the timer that everything is fine and it should exit. If we simply clear EP_HALT_PENDING, a new stop endpoint command could sneak in and set it before the watchdog timer can grab the lock. Instead we use a combination of the EP_HALT_PENDING flag and a counter for the number of pending stop endpoint commands (xhci_virt_ep->stop_cmds_pending). If we need to cancel the watchdog timer and del_timer() succeeds, we decrement the number of pending stop endpoint commands. If del_timer() fails, we leave the number of pending stop endpoint commands alone. In either case, we clear the EP_HALT_PENDING flag. The timer will decrement the number of pending stop endpoint commands once it obtains the lock. If the timer is the tail end of the last stop endpoint command (xhci_virt_ep->stop_cmds_pending == 0), and the endpoint's command is still pending (EP_HALT_PENDING is set), we assume the host is dying. The watchdog timer will set XHCI_STATE_DYING, try to halt the xHCI host, and give back all pending URBs. Various other places in the driver need to check whether the xHCI host is dying. If the interrupt handler ever notices, it should immediately stop processing events. The URB enqueue function should also return -ESHUTDOWN. The URB dequeue function should simply return the value of usb_hcd_check_unlink_urb() and the watchdog timer will take care of giving the URB back. When a device is disconnected, the xHCI hardware structures should be freed without issuing a disable slot command (since the hardware probably won't respond to it anyway). The debugging polling loop should stop polling if the host is dying. When a device is disconnected, any pending watchdog timers are killed with del_timer_sync(). It must be synchronous so that the watchdog timer doesn't attempt to access the freed endpoint structures. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:57:01 +00:00
if (xhci->xhc_state & XHCI_STATE_DYING)
goto dying;
USB: xhci: Add memory allocation for USB3 bulk streams. Add support for allocating streams for USB 3.0 bulk endpoints. See Documentation/usb/bulk-streams.txt for more information about how and why you would use streams. When an endpoint has streams enabled, instead of having one ring where all transfers are enqueued to the hardware, it has several rings. The ring dequeue pointer in the endpoint context is changed to point to a "Stream Context Array". This is basically an array of pointers to transfer rings, one for each stream ID that the driver wants to use. The Stream Context Array size must be a power of two, and host controllers can place a limit on the size of the array (4 to 2^16 entries). These two facts make calculating the size of the Stream Context Array and the number of entries actually used by the driver a bit tricky. Besides the Stream Context Array and rings for all the stream IDs, we need one more data structure. The xHCI hardware will not tell us which stream ID a transfer event was for, but it will give us the slot ID, endpoint index, and physical address for the TRB that caused the event. For every endpoint on a device, add a radix tree to map physical TRB addresses to virtual segments within a stream ring. Keep track of whether an endpoint is transitioning to using streams, and don't enqueue any URBs while that's taking place. Refuse to transition an endpoint to streams if there are already URBs enqueued for that endpoint. We need to make sure that freeing streams does not fail, since a driver's disconnect() function may attempt to do this, and it cannot fail. Pre-allocate the command structure used to issue the Configure Endpoint command, and reserve space on the command ring for each stream endpoint. This may be a bit overkill, but it is permissible for the driver to allocate all streams in one call and free them in multiple calls. (It is not advised, however, since it is a waste of resources and time.) Even with the memory and ring room pre-allocated, freeing streams can still fail because the xHC rejects the configure endpoint command. It is valid (by the xHCI 0.96 spec) to return a "Bandwidth Error" or a "Resource Error" for a configure endpoint command. We should never see a Bandwidth Error, since bulk endpoints do not effect the reserved bandwidth. The host controller can still return a Resource Error, but it's improbable since the xHC would be going from a more resource-intensive configuration (streams) to a less resource-intensive configuration (no streams). If the xHC returns a Resource Error, the endpoint will be stuck with streams and will be unusable for drivers. It's an unavoidable consequence of broken host controller hardware. Includes bug fixes from the original patch, contributed by John Youn <John.Youn@synopsys.com> and Andy Green <AGreen@PLXTech.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-02 22:34:16 +00:00
if (xhci->devs[slot_id]->eps[ep_index].ep_state &
EP_GETTING_STREAMS) {
xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep "
"is transitioning to using streams.\n");
ret = -EINVAL;
} else if (xhci->devs[slot_id]->eps[ep_index].ep_state &
EP_GETTING_NO_STREAMS) {
xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep "
"is transitioning to "
"not having streams.\n");
ret = -EINVAL;
} else {
ret = xhci_queue_bulk_tx(xhci, GFP_ATOMIC, urb,
slot_id, ep_index);
}
USB: xhci: Support full speed devices. Full speed devices have varying max packet sizes (8, 16, 32, or 64) for endpoint 0. The xHCI hardware needs to know the real max packet size that the USB core discovers after it fetches the first 8 bytes of the device descriptor. In order to fix this without adding a new hook to host controller drivers, the xHCI driver looks for an updated max packet size for control endpoints. If it finds an updated size, it issues an evaluate context command and waits for that command to finish. This should only happen in the initialization and device descriptor fetching steps in the khubd thread, so blocking should be fine. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:49 +00:00
spin_unlock_irqrestore(&xhci->lock, flags);
USB: xhci: Support interrupt transfers. Interrupt transfers are submitted to the xHCI hardware using the same TRB type as bulk transfers. Re-use the bulk transfer enqueueing code to enqueue interrupt transfers. Interrupt transfers are a bit different than bulk transfers. When the interrupt endpoint is to be serviced, the xHC will consume (at most) one TD. A TD (comprised of sg list entries) can take several service intervals to transmit. The important thing for device drivers to note is that if they use the scatter gather interface to submit interrupt requests, they will not get data sent from two different scatter gather lists in the same service interval. For now, the xHCI driver will use the service interval from the endpoint's descriptor (bInterval). Drivers will need a hook to poll at a more frequent interval. Set urb->interval to the interval that the xHCI hardware will use. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-02 19:14:28 +00:00
} else if (usb_endpoint_xfer_int(&urb->ep->desc)) {
spin_lock_irqsave(&xhci->lock, flags);
USB: xhci: Add watchdog timer for URB cancellation. In order to giveback a canceled URB, we must ensure that the xHCI hardware will not access the buffer in an URB. We can't modify the buffer pointers on endpoint rings without issuing and waiting for a stop endpoint command. Since URBs can be canceled in interrupt context, we can't wait on that command. The old code trusted that the host controller would respond to the command, and would giveback the URBs in the event handler. If the hardware never responds to the stop endpoint command, the URBs will never be completed, and we might hang the USB subsystem. Implement a watchdog timer that is spawned whenever a stop endpoint command is queued. If a stop endpoint command event is found on the event ring during an interrupt, we need to stop the watchdog timer with del_timer(). Since del_timer() can fail if the timer is running and waiting on the xHCI lock, we need a way to signal to the timer that everything is fine and it should exit. If we simply clear EP_HALT_PENDING, a new stop endpoint command could sneak in and set it before the watchdog timer can grab the lock. Instead we use a combination of the EP_HALT_PENDING flag and a counter for the number of pending stop endpoint commands (xhci_virt_ep->stop_cmds_pending). If we need to cancel the watchdog timer and del_timer() succeeds, we decrement the number of pending stop endpoint commands. If del_timer() fails, we leave the number of pending stop endpoint commands alone. In either case, we clear the EP_HALT_PENDING flag. The timer will decrement the number of pending stop endpoint commands once it obtains the lock. If the timer is the tail end of the last stop endpoint command (xhci_virt_ep->stop_cmds_pending == 0), and the endpoint's command is still pending (EP_HALT_PENDING is set), we assume the host is dying. The watchdog timer will set XHCI_STATE_DYING, try to halt the xHCI host, and give back all pending URBs. Various other places in the driver need to check whether the xHCI host is dying. If the interrupt handler ever notices, it should immediately stop processing events. The URB enqueue function should also return -ESHUTDOWN. The URB dequeue function should simply return the value of usb_hcd_check_unlink_urb() and the watchdog timer will take care of giving the URB back. When a device is disconnected, the xHCI hardware structures should be freed without issuing a disable slot command (since the hardware probably won't respond to it anyway). The debugging polling loop should stop polling if the host is dying. When a device is disconnected, any pending watchdog timers are killed with del_timer_sync(). It must be synchronous so that the watchdog timer doesn't attempt to access the freed endpoint structures. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:57:01 +00:00
if (xhci->xhc_state & XHCI_STATE_DYING)
goto dying;
USB: xhci: Support interrupt transfers. Interrupt transfers are submitted to the xHCI hardware using the same TRB type as bulk transfers. Re-use the bulk transfer enqueueing code to enqueue interrupt transfers. Interrupt transfers are a bit different than bulk transfers. When the interrupt endpoint is to be serviced, the xHC will consume (at most) one TD. A TD (comprised of sg list entries) can take several service intervals to transmit. The important thing for device drivers to note is that if they use the scatter gather interface to submit interrupt requests, they will not get data sent from two different scatter gather lists in the same service interval. For now, the xHCI driver will use the service interval from the endpoint's descriptor (bInterval). Drivers will need a hook to poll at a more frequent interval. Set urb->interval to the interval that the xHCI hardware will use. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-02 19:14:28 +00:00
ret = xhci_queue_intr_tx(xhci, GFP_ATOMIC, urb,
slot_id, ep_index);
spin_unlock_irqrestore(&xhci->lock, flags);
USB: xhci: Support full speed devices. Full speed devices have varying max packet sizes (8, 16, 32, or 64) for endpoint 0. The xHCI hardware needs to know the real max packet size that the USB core discovers after it fetches the first 8 bytes of the device descriptor. In order to fix this without adding a new hook to host controller drivers, the xHCI driver looks for an updated max packet size for control endpoints. If it finds an updated size, it issues an evaluate context command and waits for that command to finish. This should only happen in the initialization and device descriptor fetching steps in the khubd thread, so blocking should be fine. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:49 +00:00
} else {
USB: xHCI: Isoc urb enqueue Enable isochronous urb enqueue. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-22 22:23:52 +00:00
spin_lock_irqsave(&xhci->lock, flags);
if (xhci->xhc_state & XHCI_STATE_DYING)
goto dying;
ret = xhci_queue_isoc_tx_prepare(xhci, GFP_ATOMIC, urb,
slot_id, ep_index);
spin_unlock_irqrestore(&xhci->lock, flags);
USB: xhci: Support full speed devices. Full speed devices have varying max packet sizes (8, 16, 32, or 64) for endpoint 0. The xHCI hardware needs to know the real max packet size that the USB core discovers after it fetches the first 8 bytes of the device descriptor. In order to fix this without adding a new hook to host controller drivers, the xHCI driver looks for an updated max packet size for control endpoints. If it finds an updated size, it issues an evaluate context command and waits for that command to finish. This should only happen in the initialization and device descriptor fetching steps in the khubd thread, so blocking should be fine. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:49 +00:00
}
USB: xhci: Control transfer support. Allow device drivers to enqueue URBs to control endpoints on devices under an xHCI host controller. Each control transfer is represented by a series of Transfer Descriptors (TDs) written to an endpoint ring. There is one TD for the Setup phase, (optionally) one TD for the Data phase, and one TD for the Status phase. Enqueue these TDs onto the endpoint ring that represents the control endpoint. The host controller hardware will return an event on the event ring that points to the (DMA) address of one of the TDs on the endpoint ring. If the transfer was successful, the transfer event TRB will have a completion code of success, and it will point to the Status phase TD. Anything else is considered an error. This should work for control endpoints besides the default endpoint, but that hasn't been tested. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:01 +00:00
exit:
return ret;
USB: xhci: Add watchdog timer for URB cancellation. In order to giveback a canceled URB, we must ensure that the xHCI hardware will not access the buffer in an URB. We can't modify the buffer pointers on endpoint rings without issuing and waiting for a stop endpoint command. Since URBs can be canceled in interrupt context, we can't wait on that command. The old code trusted that the host controller would respond to the command, and would giveback the URBs in the event handler. If the hardware never responds to the stop endpoint command, the URBs will never be completed, and we might hang the USB subsystem. Implement a watchdog timer that is spawned whenever a stop endpoint command is queued. If a stop endpoint command event is found on the event ring during an interrupt, we need to stop the watchdog timer with del_timer(). Since del_timer() can fail if the timer is running and waiting on the xHCI lock, we need a way to signal to the timer that everything is fine and it should exit. If we simply clear EP_HALT_PENDING, a new stop endpoint command could sneak in and set it before the watchdog timer can grab the lock. Instead we use a combination of the EP_HALT_PENDING flag and a counter for the number of pending stop endpoint commands (xhci_virt_ep->stop_cmds_pending). If we need to cancel the watchdog timer and del_timer() succeeds, we decrement the number of pending stop endpoint commands. If del_timer() fails, we leave the number of pending stop endpoint commands alone. In either case, we clear the EP_HALT_PENDING flag. The timer will decrement the number of pending stop endpoint commands once it obtains the lock. If the timer is the tail end of the last stop endpoint command (xhci_virt_ep->stop_cmds_pending == 0), and the endpoint's command is still pending (EP_HALT_PENDING is set), we assume the host is dying. The watchdog timer will set XHCI_STATE_DYING, try to halt the xHCI host, and give back all pending URBs. Various other places in the driver need to check whether the xHCI host is dying. If the interrupt handler ever notices, it should immediately stop processing events. The URB enqueue function should also return -ESHUTDOWN. The URB dequeue function should simply return the value of usb_hcd_check_unlink_urb() and the watchdog timer will take care of giving the URB back. When a device is disconnected, the xHCI hardware structures should be freed without issuing a disable slot command (since the hardware probably won't respond to it anyway). The debugging polling loop should stop polling if the host is dying. When a device is disconnected, any pending watchdog timers are killed with del_timer_sync(). It must be synchronous so that the watchdog timer doesn't attempt to access the freed endpoint structures. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:57:01 +00:00
dying:
USB: xHCI: Introduce urb_priv structure Add urb_priv data structure to xHCI driver. This structure allows multiple xhci TDs to be linked to one urb, which is essential for isochronous transfer. For non-isochronous urb, only one TD is needed for one urb; for isochronous urb, the TD number for the urb is equal to urb->number_of_packets. The length field of urb_priv indicates the number of TDs in the urb. The td_cnt field indicates the number of TDs already processed by xHC. When td_cnt matches length, the urb can be given back to usbcore. When an urb is dequeued or cancelled, add all the unprocessed TDs to the endpoint's cancelled_td_list. When process a cancelled TD, increase td_cnt field. When td_cnt equals urb_priv->length, giveback the cancelled urb. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-22 22:23:31 +00:00
xhci_urb_free_priv(xhci, urb_priv);
urb->hcpriv = NULL;
USB: xhci: Add watchdog timer for URB cancellation. In order to giveback a canceled URB, we must ensure that the xHCI hardware will not access the buffer in an URB. We can't modify the buffer pointers on endpoint rings without issuing and waiting for a stop endpoint command. Since URBs can be canceled in interrupt context, we can't wait on that command. The old code trusted that the host controller would respond to the command, and would giveback the URBs in the event handler. If the hardware never responds to the stop endpoint command, the URBs will never be completed, and we might hang the USB subsystem. Implement a watchdog timer that is spawned whenever a stop endpoint command is queued. If a stop endpoint command event is found on the event ring during an interrupt, we need to stop the watchdog timer with del_timer(). Since del_timer() can fail if the timer is running and waiting on the xHCI lock, we need a way to signal to the timer that everything is fine and it should exit. If we simply clear EP_HALT_PENDING, a new stop endpoint command could sneak in and set it before the watchdog timer can grab the lock. Instead we use a combination of the EP_HALT_PENDING flag and a counter for the number of pending stop endpoint commands (xhci_virt_ep->stop_cmds_pending). If we need to cancel the watchdog timer and del_timer() succeeds, we decrement the number of pending stop endpoint commands. If del_timer() fails, we leave the number of pending stop endpoint commands alone. In either case, we clear the EP_HALT_PENDING flag. The timer will decrement the number of pending stop endpoint commands once it obtains the lock. If the timer is the tail end of the last stop endpoint command (xhci_virt_ep->stop_cmds_pending == 0), and the endpoint's command is still pending (EP_HALT_PENDING is set), we assume the host is dying. The watchdog timer will set XHCI_STATE_DYING, try to halt the xHCI host, and give back all pending URBs. Various other places in the driver need to check whether the xHCI host is dying. If the interrupt handler ever notices, it should immediately stop processing events. The URB enqueue function should also return -ESHUTDOWN. The URB dequeue function should simply return the value of usb_hcd_check_unlink_urb() and the watchdog timer will take care of giving the URB back. When a device is disconnected, the xHCI hardware structures should be freed without issuing a disable slot command (since the hardware probably won't respond to it anyway). The debugging polling loop should stop polling if the host is dying. When a device is disconnected, any pending watchdog timers are killed with del_timer_sync(). It must be synchronous so that the watchdog timer doesn't attempt to access the freed endpoint structures. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:57:01 +00:00
xhci_dbg(xhci, "Ep 0x%x: URB %p submitted for "
"non-responsive xHCI host.\n",
urb->ep->desc.bEndpointAddress, urb);
spin_unlock_irqrestore(&xhci->lock, flags);
return -ESHUTDOWN;
USB: xhci: Control transfer support. Allow device drivers to enqueue URBs to control endpoints on devices under an xHCI host controller. Each control transfer is represented by a series of Transfer Descriptors (TDs) written to an endpoint ring. There is one TD for the Setup phase, (optionally) one TD for the Data phase, and one TD for the Status phase. Enqueue these TDs onto the endpoint ring that represents the control endpoint. The host controller hardware will return an event on the event ring that points to the (DMA) address of one of the TDs on the endpoint ring. If the transfer was successful, the transfer event TRB will have a completion code of success, and it will point to the Status phase TD. Anything else is considered an error. This should work for control endpoints besides the default endpoint, but that hasn't been tested. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:01 +00:00
}
USB: xhci: Performance - move functions that find ep ring. I've been using perf to measure the top symbols while transferring 1GB of data on a USB 3.0 drive with dd. This is using the raw disk with /dev/sdb, with a block size of 1K. During performance testing, the top symbol was xhci_triad_to_transfer_ring(), a function that should return immediately if streams are not enabled for an endpoint. It turned out that the functions to find the endpoint ring was defined in xhci-mem.c and used in xhci-ring.c and xhci-hcd.c. I moved a copy of xhci_triad_to_transfer_ring() and xhci_urb_to_transfer_ring() into xhci-ring.c and declared them static. I also made a static version of xhci_urb_to_transfer_ring() in xhci.c. This improved throughput on a 1GB read of the raw disk with dd from 186MB/s to 195MB/s, and perf reported sampling the xhci_triad_to_transfer_ring() 0.06% of the time, rather than 9.26% of the time. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-30 05:12:20 +00:00
/* Get the right ring for the given URB.
* If the endpoint supports streams, boundary check the URB's stream ID.
* If the endpoint doesn't support streams, return the singular endpoint ring.
*/
static struct xhci_ring *xhci_urb_to_transfer_ring(struct xhci_hcd *xhci,
struct urb *urb)
{
unsigned int slot_id;
unsigned int ep_index;
unsigned int stream_id;
struct xhci_virt_ep *ep;
slot_id = urb->dev->slot_id;
ep_index = xhci_get_endpoint_index(&urb->ep->desc);
stream_id = urb->stream_id;
ep = &xhci->devs[slot_id]->eps[ep_index];
/* Common case: no streams */
if (!(ep->ep_state & EP_HAS_STREAMS))
return ep->ring;
if (stream_id == 0) {
xhci_warn(xhci,
"WARN: Slot ID %u, ep index %u has streams, "
"but URB has no stream ID.\n",
slot_id, ep_index);
return NULL;
}
if (stream_id < ep->stream_info->num_streams)
return ep->stream_info->stream_rings[stream_id];
xhci_warn(xhci,
"WARN: Slot ID %u, ep index %u has "
"stream IDs 1 to %u allocated, "
"but stream ID %u is requested.\n",
slot_id, ep_index,
ep->stream_info->num_streams - 1,
stream_id);
return NULL;
}
USB: xhci: URB cancellation support. Add URB cancellation support to the xHCI host controller driver. This currently supports cancellation for endpoints that do not have streams enabled. An URB is represented by a number of Transaction Request Buffers (TRBs), that are chained together to make one (or more) Transaction Descriptors (TDs) on an endpoint ring. The ring is comprised of contiguous segments, linked together with Link TRBs (which may or may not be chained into a TD). To cancel an URB, we must stop the endpoint ring, make the hardware skip over the TDs in the URB (either by turning them into No-op TDs, or by moving the hardware's ring dequeue pointer past the last TRB in the last TD), and then restart the ring. There are times when we must drop the xHCI lock during this process, like when we need to complete cancelled URBs. We must ensure that additional URBs can be marked as cancelled, and that new URBs can be enqueued (since the URB completion handlers can do either). The new endpoint ring variables cancels_pending and state (which can only be modified while holding the xHCI lock) ensure that future cancellation and enqueueing do not interrupt any pending cancellation code. To facilitate cancellation, we must keep track of the starting ring segment, first TRB, and last TRB for each URB. We also need to keep track of the list of TDs that have been marked as cancelled, separate from the list of TDs that are queued for this endpoint. The new variables and cancellation list are stored in the xhci_td structure. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:02:31 +00:00
/*
* Remove the URB's TD from the endpoint ring. This may cause the HC to stop
* USB transfers, potentially stopping in the middle of a TRB buffer. The HC
* should pick up where it left off in the TD, unless a Set Transfer Ring
* Dequeue Pointer is issued.
*
* The TRBs that make up the buffers for the canceled URB will be "removed" from
* the ring. Since the ring is a contiguous structure, they can't be physically
* removed. Instead, there are two options:
*
* 1) If the HC is in the middle of processing the URB to be canceled, we
* simply move the ring's dequeue pointer past those TRBs using the Set
* Transfer Ring Dequeue Pointer command. This will be the common case,
* when drivers timeout on the last submitted URB and attempt to cancel.
*
* 2) If the HC is in the middle of a different TD, we turn the TRBs into a
* series of 1-TRB transfer no-op TDs. (No-ops shouldn't be chained.) The
* HC will need to invalidate the any TRBs it has cached after the stop
* endpoint command, as noted in the xHCI 0.95 errata.
*
* 3) The TD may have completed by the time the Stop Endpoint Command
* completes, so software needs to handle that case too.
*
* This function should protect against the TD enqueueing code ringing the
* doorbell while this code is waiting for a Stop Endpoint command to complete.
* It also needs to account for multiple cancellations on happening at the same
* time for the same endpoint.
*
* Note that this function can be called in any context, or so says
* usb_hcd_unlink_urb()
USB: xhci: Control transfer support. Allow device drivers to enqueue URBs to control endpoints on devices under an xHCI host controller. Each control transfer is represented by a series of Transfer Descriptors (TDs) written to an endpoint ring. There is one TD for the Setup phase, (optionally) one TD for the Data phase, and one TD for the Status phase. Enqueue these TDs onto the endpoint ring that represents the control endpoint. The host controller hardware will return an event on the event ring that points to the (DMA) address of one of the TDs on the endpoint ring. If the transfer was successful, the transfer event TRB will have a completion code of success, and it will point to the Status phase TD. Anything else is considered an error. This should work for control endpoints besides the default endpoint, but that hasn't been tested. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:01 +00:00
*/
int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
{
USB: xhci: URB cancellation support. Add URB cancellation support to the xHCI host controller driver. This currently supports cancellation for endpoints that do not have streams enabled. An URB is represented by a number of Transaction Request Buffers (TRBs), that are chained together to make one (or more) Transaction Descriptors (TDs) on an endpoint ring. The ring is comprised of contiguous segments, linked together with Link TRBs (which may or may not be chained into a TD). To cancel an URB, we must stop the endpoint ring, make the hardware skip over the TDs in the URB (either by turning them into No-op TDs, or by moving the hardware's ring dequeue pointer past the last TRB in the last TD), and then restart the ring. There are times when we must drop the xHCI lock during this process, like when we need to complete cancelled URBs. We must ensure that additional URBs can be marked as cancelled, and that new URBs can be enqueued (since the URB completion handlers can do either). The new endpoint ring variables cancels_pending and state (which can only be modified while holding the xHCI lock) ensure that future cancellation and enqueueing do not interrupt any pending cancellation code. To facilitate cancellation, we must keep track of the starting ring segment, first TRB, and last TRB for each URB. We also need to keep track of the list of TDs that have been marked as cancelled, separate from the list of TDs that are queued for this endpoint. The new variables and cancellation list are stored in the xhci_td structure. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:02:31 +00:00
unsigned long flags;
USB: xHCI: Introduce urb_priv structure Add urb_priv data structure to xHCI driver. This structure allows multiple xhci TDs to be linked to one urb, which is essential for isochronous transfer. For non-isochronous urb, only one TD is needed for one urb; for isochronous urb, the TD number for the urb is equal to urb->number_of_packets. The length field of urb_priv indicates the number of TDs in the urb. The td_cnt field indicates the number of TDs already processed by xHC. When td_cnt matches length, the urb can be given back to usbcore. When an urb is dequeued or cancelled, add all the unprocessed TDs to the endpoint's cancelled_td_list. When process a cancelled TD, increase td_cnt field. When td_cnt equals urb_priv->length, giveback the cancelled urb. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-22 22:23:31 +00:00
int ret, i;
USB: xhci: Handle canceled URBs when HC dies. When the host controller dies (e.g. it is removed from a PCI card slot), the xHCI driver cannot expect commands to complete. The buggy code this patch fixes would mark an URB as canceled and then expect the URB to be completed when the stop endpoint command completed. That would never happen if the host controller was dead, so the USB core would just hang in the disconnect code. If the host controller died, and the driver asks to cancel an URB, free any structures associated with that URB and immediately give it back. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-29 00:21:37 +00:00
u32 temp;
USB: xhci: URB cancellation support. Add URB cancellation support to the xHCI host controller driver. This currently supports cancellation for endpoints that do not have streams enabled. An URB is represented by a number of Transaction Request Buffers (TRBs), that are chained together to make one (or more) Transaction Descriptors (TDs) on an endpoint ring. The ring is comprised of contiguous segments, linked together with Link TRBs (which may or may not be chained into a TD). To cancel an URB, we must stop the endpoint ring, make the hardware skip over the TDs in the URB (either by turning them into No-op TDs, or by moving the hardware's ring dequeue pointer past the last TRB in the last TD), and then restart the ring. There are times when we must drop the xHCI lock during this process, like when we need to complete cancelled URBs. We must ensure that additional URBs can be marked as cancelled, and that new URBs can be enqueued (since the URB completion handlers can do either). The new endpoint ring variables cancels_pending and state (which can only be modified while holding the xHCI lock) ensure that future cancellation and enqueueing do not interrupt any pending cancellation code. To facilitate cancellation, we must keep track of the starting ring segment, first TRB, and last TRB for each URB. We also need to keep track of the list of TDs that have been marked as cancelled, separate from the list of TDs that are queued for this endpoint. The new variables and cancellation list are stored in the xhci_td structure. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:02:31 +00:00
struct xhci_hcd *xhci;
USB: xHCI: Introduce urb_priv structure Add urb_priv data structure to xHCI driver. This structure allows multiple xhci TDs to be linked to one urb, which is essential for isochronous transfer. For non-isochronous urb, only one TD is needed for one urb; for isochronous urb, the TD number for the urb is equal to urb->number_of_packets. The length field of urb_priv indicates the number of TDs in the urb. The td_cnt field indicates the number of TDs already processed by xHC. When td_cnt matches length, the urb can be given back to usbcore. When an urb is dequeued or cancelled, add all the unprocessed TDs to the endpoint's cancelled_td_list. When process a cancelled TD, increase td_cnt field. When td_cnt equals urb_priv->length, giveback the cancelled urb. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-22 22:23:31 +00:00
struct urb_priv *urb_priv;
USB: xhci: URB cancellation support. Add URB cancellation support to the xHCI host controller driver. This currently supports cancellation for endpoints that do not have streams enabled. An URB is represented by a number of Transaction Request Buffers (TRBs), that are chained together to make one (or more) Transaction Descriptors (TDs) on an endpoint ring. The ring is comprised of contiguous segments, linked together with Link TRBs (which may or may not be chained into a TD). To cancel an URB, we must stop the endpoint ring, make the hardware skip over the TDs in the URB (either by turning them into No-op TDs, or by moving the hardware's ring dequeue pointer past the last TRB in the last TD), and then restart the ring. There are times when we must drop the xHCI lock during this process, like when we need to complete cancelled URBs. We must ensure that additional URBs can be marked as cancelled, and that new URBs can be enqueued (since the URB completion handlers can do either). The new endpoint ring variables cancels_pending and state (which can only be modified while holding the xHCI lock) ensure that future cancellation and enqueueing do not interrupt any pending cancellation code. To facilitate cancellation, we must keep track of the starting ring segment, first TRB, and last TRB for each URB. We also need to keep track of the list of TDs that have been marked as cancelled, separate from the list of TDs that are queued for this endpoint. The new variables and cancellation list are stored in the xhci_td structure. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:02:31 +00:00
struct xhci_td *td;
unsigned int ep_index;
struct xhci_ring *ep_ring;
USB: xhci: Endpoint representation refactoring. The xhci_ring structure contained information that is really related to an endpoint, not a ring. This will cause problems later when endpoint streams are supported and there are multiple rings per endpoint. Move the endpoint state and cancellation information into a new virtual endpoint structure, xhci_virt_ep. The list of TRBs to be cancelled should be per endpoint, not per ring, for easy access. There can be only one TRB that the endpoint stopped on after a stop endpoint command (even with streams enabled); move the stopped TRB information into the new virtual endpoint structure. Also move the 31 endpoint rings and temporary ring storage from the virtual device structure (xhci_virt_device) into the virtual endpoint structure (xhci_virt_ep). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:09 +00:00
struct xhci_virt_ep *ep;
USB: xhci: URB cancellation support. Add URB cancellation support to the xHCI host controller driver. This currently supports cancellation for endpoints that do not have streams enabled. An URB is represented by a number of Transaction Request Buffers (TRBs), that are chained together to make one (or more) Transaction Descriptors (TDs) on an endpoint ring. The ring is comprised of contiguous segments, linked together with Link TRBs (which may or may not be chained into a TD). To cancel an URB, we must stop the endpoint ring, make the hardware skip over the TDs in the URB (either by turning them into No-op TDs, or by moving the hardware's ring dequeue pointer past the last TRB in the last TD), and then restart the ring. There are times when we must drop the xHCI lock during this process, like when we need to complete cancelled URBs. We must ensure that additional URBs can be marked as cancelled, and that new URBs can be enqueued (since the URB completion handlers can do either). The new endpoint ring variables cancels_pending and state (which can only be modified while holding the xHCI lock) ensure that future cancellation and enqueueing do not interrupt any pending cancellation code. To facilitate cancellation, we must keep track of the starting ring segment, first TRB, and last TRB for each URB. We also need to keep track of the list of TDs that have been marked as cancelled, separate from the list of TDs that are queued for this endpoint. The new variables and cancellation list are stored in the xhci_td structure. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:02:31 +00:00
xhci = hcd_to_xhci(hcd);
spin_lock_irqsave(&xhci->lock, flags);
/* Make sure the URB hasn't completed or been unlinked already */
ret = usb_hcd_check_unlink_urb(hcd, urb, status);
if (ret || !urb->hcpriv)
goto done;
USB: xhci: Handle canceled URBs when HC dies. When the host controller dies (e.g. it is removed from a PCI card slot), the xHCI driver cannot expect commands to complete. The buggy code this patch fixes would mark an URB as canceled and then expect the URB to be completed when the stop endpoint command completed. That would never happen if the host controller was dead, so the USB core would just hang in the disconnect code. If the host controller died, and the driver asks to cancel an URB, free any structures associated with that URB and immediately give it back. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-29 00:21:37 +00:00
temp = xhci_readl(xhci, &xhci->op_regs->status);
if (temp == 0xffffffff) {
xhci_dbg(xhci, "HW died, freeing TD.\n");
USB: xHCI: Introduce urb_priv structure Add urb_priv data structure to xHCI driver. This structure allows multiple xhci TDs to be linked to one urb, which is essential for isochronous transfer. For non-isochronous urb, only one TD is needed for one urb; for isochronous urb, the TD number for the urb is equal to urb->number_of_packets. The length field of urb_priv indicates the number of TDs in the urb. The td_cnt field indicates the number of TDs already processed by xHC. When td_cnt matches length, the urb can be given back to usbcore. When an urb is dequeued or cancelled, add all the unprocessed TDs to the endpoint's cancelled_td_list. When process a cancelled TD, increase td_cnt field. When td_cnt equals urb_priv->length, giveback the cancelled urb. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-22 22:23:31 +00:00
urb_priv = urb->hcpriv;
USB: xhci: Handle canceled URBs when HC dies. When the host controller dies (e.g. it is removed from a PCI card slot), the xHCI driver cannot expect commands to complete. The buggy code this patch fixes would mark an URB as canceled and then expect the URB to be completed when the stop endpoint command completed. That would never happen if the host controller was dead, so the USB core would just hang in the disconnect code. If the host controller died, and the driver asks to cancel an URB, free any structures associated with that URB and immediately give it back. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-29 00:21:37 +00:00
usb_hcd_unlink_urb_from_ep(hcd, urb);
spin_unlock_irqrestore(&xhci->lock, flags);
usb_hcd_giveback_urb(xhci_to_hcd(xhci), urb, -ESHUTDOWN);
USB: xHCI: Introduce urb_priv structure Add urb_priv data structure to xHCI driver. This structure allows multiple xhci TDs to be linked to one urb, which is essential for isochronous transfer. For non-isochronous urb, only one TD is needed for one urb; for isochronous urb, the TD number for the urb is equal to urb->number_of_packets. The length field of urb_priv indicates the number of TDs in the urb. The td_cnt field indicates the number of TDs already processed by xHC. When td_cnt matches length, the urb can be given back to usbcore. When an urb is dequeued or cancelled, add all the unprocessed TDs to the endpoint's cancelled_td_list. When process a cancelled TD, increase td_cnt field. When td_cnt equals urb_priv->length, giveback the cancelled urb. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-22 22:23:31 +00:00
xhci_urb_free_priv(xhci, urb_priv);
USB: xhci: Handle canceled URBs when HC dies. When the host controller dies (e.g. it is removed from a PCI card slot), the xHCI driver cannot expect commands to complete. The buggy code this patch fixes would mark an URB as canceled and then expect the URB to be completed when the stop endpoint command completed. That would never happen if the host controller was dead, so the USB core would just hang in the disconnect code. If the host controller died, and the driver asks to cancel an URB, free any structures associated with that URB and immediately give it back. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-29 00:21:37 +00:00
return ret;
}
USB: xhci: Add watchdog timer for URB cancellation. In order to giveback a canceled URB, we must ensure that the xHCI hardware will not access the buffer in an URB. We can't modify the buffer pointers on endpoint rings without issuing and waiting for a stop endpoint command. Since URBs can be canceled in interrupt context, we can't wait on that command. The old code trusted that the host controller would respond to the command, and would giveback the URBs in the event handler. If the hardware never responds to the stop endpoint command, the URBs will never be completed, and we might hang the USB subsystem. Implement a watchdog timer that is spawned whenever a stop endpoint command is queued. If a stop endpoint command event is found on the event ring during an interrupt, we need to stop the watchdog timer with del_timer(). Since del_timer() can fail if the timer is running and waiting on the xHCI lock, we need a way to signal to the timer that everything is fine and it should exit. If we simply clear EP_HALT_PENDING, a new stop endpoint command could sneak in and set it before the watchdog timer can grab the lock. Instead we use a combination of the EP_HALT_PENDING flag and a counter for the number of pending stop endpoint commands (xhci_virt_ep->stop_cmds_pending). If we need to cancel the watchdog timer and del_timer() succeeds, we decrement the number of pending stop endpoint commands. If del_timer() fails, we leave the number of pending stop endpoint commands alone. In either case, we clear the EP_HALT_PENDING flag. The timer will decrement the number of pending stop endpoint commands once it obtains the lock. If the timer is the tail end of the last stop endpoint command (xhci_virt_ep->stop_cmds_pending == 0), and the endpoint's command is still pending (EP_HALT_PENDING is set), we assume the host is dying. The watchdog timer will set XHCI_STATE_DYING, try to halt the xHCI host, and give back all pending URBs. Various other places in the driver need to check whether the xHCI host is dying. If the interrupt handler ever notices, it should immediately stop processing events. The URB enqueue function should also return -ESHUTDOWN. The URB dequeue function should simply return the value of usb_hcd_check_unlink_urb() and the watchdog timer will take care of giving the URB back. When a device is disconnected, the xHCI hardware structures should be freed without issuing a disable slot command (since the hardware probably won't respond to it anyway). The debugging polling loop should stop polling if the host is dying. When a device is disconnected, any pending watchdog timers are killed with del_timer_sync(). It must be synchronous so that the watchdog timer doesn't attempt to access the freed endpoint structures. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:57:01 +00:00
if (xhci->xhc_state & XHCI_STATE_DYING) {
xhci_dbg(xhci, "Ep 0x%x: URB %p to be canceled on "
"non-responsive xHCI host.\n",
urb->ep->desc.bEndpointAddress, urb);
/* Let the stop endpoint command watchdog timer (which set this
* state) finish cleaning up the endpoint TD lists. We must
* have caught it in the middle of dropping a lock and giving
* back an URB.
*/
goto done;
}
USB: xhci: URB cancellation support. Add URB cancellation support to the xHCI host controller driver. This currently supports cancellation for endpoints that do not have streams enabled. An URB is represented by a number of Transaction Request Buffers (TRBs), that are chained together to make one (or more) Transaction Descriptors (TDs) on an endpoint ring. The ring is comprised of contiguous segments, linked together with Link TRBs (which may or may not be chained into a TD). To cancel an URB, we must stop the endpoint ring, make the hardware skip over the TDs in the URB (either by turning them into No-op TDs, or by moving the hardware's ring dequeue pointer past the last TRB in the last TD), and then restart the ring. There are times when we must drop the xHCI lock during this process, like when we need to complete cancelled URBs. We must ensure that additional URBs can be marked as cancelled, and that new URBs can be enqueued (since the URB completion handlers can do either). The new endpoint ring variables cancels_pending and state (which can only be modified while holding the xHCI lock) ensure that future cancellation and enqueueing do not interrupt any pending cancellation code. To facilitate cancellation, we must keep track of the starting ring segment, first TRB, and last TRB for each URB. We also need to keep track of the list of TDs that have been marked as cancelled, separate from the list of TDs that are queued for this endpoint. The new variables and cancellation list are stored in the xhci_td structure. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:02:31 +00:00
USB: xhci: fix lots of compiler warnings. Turns out someone never built this code on a 64bit platform. Someone owes me a beer... Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:14:08 +00:00
xhci_dbg(xhci, "Cancel URB %p\n", urb);
USB: xhci: Make debugging more verbose. Add more debugging to the irq handler, slot context initialization, ring operations, URB cancellation, and MMIO writes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:46 +00:00
xhci_dbg(xhci, "Event ring:\n");
xhci_debug_ring(xhci, xhci->event_ring);
USB: xhci: URB cancellation support. Add URB cancellation support to the xHCI host controller driver. This currently supports cancellation for endpoints that do not have streams enabled. An URB is represented by a number of Transaction Request Buffers (TRBs), that are chained together to make one (or more) Transaction Descriptors (TDs) on an endpoint ring. The ring is comprised of contiguous segments, linked together with Link TRBs (which may or may not be chained into a TD). To cancel an URB, we must stop the endpoint ring, make the hardware skip over the TDs in the URB (either by turning them into No-op TDs, or by moving the hardware's ring dequeue pointer past the last TRB in the last TD), and then restart the ring. There are times when we must drop the xHCI lock during this process, like when we need to complete cancelled URBs. We must ensure that additional URBs can be marked as cancelled, and that new URBs can be enqueued (since the URB completion handlers can do either). The new endpoint ring variables cancels_pending and state (which can only be modified while holding the xHCI lock) ensure that future cancellation and enqueueing do not interrupt any pending cancellation code. To facilitate cancellation, we must keep track of the starting ring segment, first TRB, and last TRB for each URB. We also need to keep track of the list of TDs that have been marked as cancelled, separate from the list of TDs that are queued for this endpoint. The new variables and cancellation list are stored in the xhci_td structure. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:02:31 +00:00
ep_index = xhci_get_endpoint_index(&urb->ep->desc);
USB: xhci: Endpoint representation refactoring. The xhci_ring structure contained information that is really related to an endpoint, not a ring. This will cause problems later when endpoint streams are supported and there are multiple rings per endpoint. Move the endpoint state and cancellation information into a new virtual endpoint structure, xhci_virt_ep. The list of TRBs to be cancelled should be per endpoint, not per ring, for easy access. There can be only one TRB that the endpoint stopped on after a stop endpoint command (even with streams enabled); move the stopped TRB information into the new virtual endpoint structure. Also move the 31 endpoint rings and temporary ring storage from the virtual device structure (xhci_virt_device) into the virtual endpoint structure (xhci_virt_ep). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:09 +00:00
ep = &xhci->devs[urb->dev->slot_id]->eps[ep_index];
USB: xhci: Correct assumptions about number of rings per endpoint. Much of the xHCI driver code assumes that endpoints only have one ring. Now an endpoint can have one ring per enabled stream ID, so correct that assumption. Use functions that translate the stream_id field in the URB or the DMA address of a TRB into the correct stream ring. Correct the polling loop to print out all enabled stream rings. Make the URB cancellation routine find the correct stream ring if the URB has stream_id set. Make sure the URB enqueueing routine does the same. Also correct the code that handles stalled/halted endpoints. Check that commands and registers that can take stream IDs handle them properly. That includes ringing an endpoint doorbell, resetting a stalled/halted endpoint, and setting a transfer ring dequeue pointer (since that command can set the dequeue pointer in a stream context or an endpoint context). Correct the transfer event handler to translate a TRB DMA address into the stream ring it was enqueued to. Make the code to allocate and prepare TD structures adds the TD to the right td_list for the stream ring. Make sure the code to give the first TRB in a TD to the hardware manipulates the correct stream ring. When an endpoint stalls, store the stream ID of the stream ring that stalled in the xhci_virt_ep structure. Use that instead of the stream ID in the URB, since an URB may be re-used after it is given back after a non-control endpoint stall. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-02 22:34:43 +00:00
ep_ring = xhci_urb_to_transfer_ring(xhci, urb);
if (!ep_ring) {
ret = -EINVAL;
goto done;
}
USB: xhci: Make debugging more verbose. Add more debugging to the irq handler, slot context initialization, ring operations, URB cancellation, and MMIO writes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:46 +00:00
xhci_dbg(xhci, "Endpoint ring:\n");
xhci_debug_ring(xhci, ep_ring);
USB: xhci: URB cancellation support. Add URB cancellation support to the xHCI host controller driver. This currently supports cancellation for endpoints that do not have streams enabled. An URB is represented by a number of Transaction Request Buffers (TRBs), that are chained together to make one (or more) Transaction Descriptors (TDs) on an endpoint ring. The ring is comprised of contiguous segments, linked together with Link TRBs (which may or may not be chained into a TD). To cancel an URB, we must stop the endpoint ring, make the hardware skip over the TDs in the URB (either by turning them into No-op TDs, or by moving the hardware's ring dequeue pointer past the last TRB in the last TD), and then restart the ring. There are times when we must drop the xHCI lock during this process, like when we need to complete cancelled URBs. We must ensure that additional URBs can be marked as cancelled, and that new URBs can be enqueued (since the URB completion handlers can do either). The new endpoint ring variables cancels_pending and state (which can only be modified while holding the xHCI lock) ensure that future cancellation and enqueueing do not interrupt any pending cancellation code. To facilitate cancellation, we must keep track of the starting ring segment, first TRB, and last TRB for each URB. We also need to keep track of the list of TDs that have been marked as cancelled, separate from the list of TDs that are queued for this endpoint. The new variables and cancellation list are stored in the xhci_td structure. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:02:31 +00:00
USB: xHCI: Introduce urb_priv structure Add urb_priv data structure to xHCI driver. This structure allows multiple xhci TDs to be linked to one urb, which is essential for isochronous transfer. For non-isochronous urb, only one TD is needed for one urb; for isochronous urb, the TD number for the urb is equal to urb->number_of_packets. The length field of urb_priv indicates the number of TDs in the urb. The td_cnt field indicates the number of TDs already processed by xHC. When td_cnt matches length, the urb can be given back to usbcore. When an urb is dequeued or cancelled, add all the unprocessed TDs to the endpoint's cancelled_td_list. When process a cancelled TD, increase td_cnt field. When td_cnt equals urb_priv->length, giveback the cancelled urb. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-22 22:23:31 +00:00
urb_priv = urb->hcpriv;
for (i = urb_priv->td_cnt; i < urb_priv->length; i++) {
td = urb_priv->td[i];
list_add_tail(&td->cancelled_td_list, &ep->cancelled_td_list);
}
USB: xhci: URB cancellation support. Add URB cancellation support to the xHCI host controller driver. This currently supports cancellation for endpoints that do not have streams enabled. An URB is represented by a number of Transaction Request Buffers (TRBs), that are chained together to make one (or more) Transaction Descriptors (TDs) on an endpoint ring. The ring is comprised of contiguous segments, linked together with Link TRBs (which may or may not be chained into a TD). To cancel an URB, we must stop the endpoint ring, make the hardware skip over the TDs in the URB (either by turning them into No-op TDs, or by moving the hardware's ring dequeue pointer past the last TRB in the last TD), and then restart the ring. There are times when we must drop the xHCI lock during this process, like when we need to complete cancelled URBs. We must ensure that additional URBs can be marked as cancelled, and that new URBs can be enqueued (since the URB completion handlers can do either). The new endpoint ring variables cancels_pending and state (which can only be modified while holding the xHCI lock) ensure that future cancellation and enqueueing do not interrupt any pending cancellation code. To facilitate cancellation, we must keep track of the starting ring segment, first TRB, and last TRB for each URB. We also need to keep track of the list of TDs that have been marked as cancelled, separate from the list of TDs that are queued for this endpoint. The new variables and cancellation list are stored in the xhci_td structure. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:02:31 +00:00
/* Queue a stop endpoint command, but only if this is
* the first cancellation to be handled.
*/
USB: xhci: Handle URB cancel, complete and resubmit race. In the old code, there was a race condition between the stop endpoint command and the URB submission process. When the stop endpoint command is handled by the event handler, the endpoint ring is assumed to be stopped. When a stop endpoint command is queued, URB submissions are to not ring the doorbell. The old code would check the number of pending URBs to be canceled, and would not ring the doorbell if it was non-zero. However, the following race condition could occur with the old code: 1. Cancel an URB, add it to the list of URBs to be canceled, queue the stop endpoint command, and increment ep->cancels_pending to 1. 2. The URB finishes on the HW, and an event is enqueued to the event ring (at the same time as 1). 3. The stop endpoint command finishes, and the endpoint is halted. An event is queued to the event ring. 4. The event handler sees the finished URB, notices it was to be canceled, decrements ep->cancels_pending to 0, and removes it from the to be canceled list. 5. The event handler drops the lock and gives back the URB. The completion handler requeues the URB (or a different driver enqueues a new URB). This causes the endpoint's doorbell to be rung, since ep->cancels_pending == 0. The endpoint is now running. 6. A second URB is canceled, and it's added to the canceled list. Since ep->cancels_pending == 0, a new stop endpoint command is queued, and ep->cancels_pending is incremented to 1. 7. The event handler then sees the completed stop endpoint command. The handler assumes the endpoint is stopped, but it isn't. It attempts to move the dequeue pointer or change TDs to cancel the second URB, while the hardware is actively accessing the endpoint ring. To eliminate this race condition, a new endpoint state bit is introduced, EP_HALT_PENDING. When this bit is set, a stop endpoint command has been queued, and the command handler has not begun to process the URB cancellation list yet. The endpoint doorbell should not be rung when this is set. Set this when a stop endpoint command is queued, clear it when the handler for that command runs, and check if it's set before ringing a doorbell. ep->cancels_pending is eliminated, because it is no longer used. Make sure to ring the doorbell for an endpoint when the stop endpoint command handler runs, even if the canceled URB list is empty. All canceled URBs could have completed and new URBs could have been enqueued without the doorbell being rung before the command was handled. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:55:52 +00:00
if (!(ep->ep_state & EP_HALT_PENDING)) {
ep->ep_state |= EP_HALT_PENDING;
USB: xhci: Add watchdog timer for URB cancellation. In order to giveback a canceled URB, we must ensure that the xHCI hardware will not access the buffer in an URB. We can't modify the buffer pointers on endpoint rings without issuing and waiting for a stop endpoint command. Since URBs can be canceled in interrupt context, we can't wait on that command. The old code trusted that the host controller would respond to the command, and would giveback the URBs in the event handler. If the hardware never responds to the stop endpoint command, the URBs will never be completed, and we might hang the USB subsystem. Implement a watchdog timer that is spawned whenever a stop endpoint command is queued. If a stop endpoint command event is found on the event ring during an interrupt, we need to stop the watchdog timer with del_timer(). Since del_timer() can fail if the timer is running and waiting on the xHCI lock, we need a way to signal to the timer that everything is fine and it should exit. If we simply clear EP_HALT_PENDING, a new stop endpoint command could sneak in and set it before the watchdog timer can grab the lock. Instead we use a combination of the EP_HALT_PENDING flag and a counter for the number of pending stop endpoint commands (xhci_virt_ep->stop_cmds_pending). If we need to cancel the watchdog timer and del_timer() succeeds, we decrement the number of pending stop endpoint commands. If del_timer() fails, we leave the number of pending stop endpoint commands alone. In either case, we clear the EP_HALT_PENDING flag. The timer will decrement the number of pending stop endpoint commands once it obtains the lock. If the timer is the tail end of the last stop endpoint command (xhci_virt_ep->stop_cmds_pending == 0), and the endpoint's command is still pending (EP_HALT_PENDING is set), we assume the host is dying. The watchdog timer will set XHCI_STATE_DYING, try to halt the xHCI host, and give back all pending URBs. Various other places in the driver need to check whether the xHCI host is dying. If the interrupt handler ever notices, it should immediately stop processing events. The URB enqueue function should also return -ESHUTDOWN. The URB dequeue function should simply return the value of usb_hcd_check_unlink_urb() and the watchdog timer will take care of giving the URB back. When a device is disconnected, the xHCI hardware structures should be freed without issuing a disable slot command (since the hardware probably won't respond to it anyway). The debugging polling loop should stop polling if the host is dying. When a device is disconnected, any pending watchdog timers are killed with del_timer_sync(). It must be synchronous so that the watchdog timer doesn't attempt to access the freed endpoint structures. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:57:01 +00:00
ep->stop_cmds_pending++;
ep->stop_cmd_timer.expires = jiffies +
XHCI_STOP_EP_CMD_TIMEOUT * HZ;
add_timer(&ep->stop_cmd_timer);
USB: xHCI: port power management implementation Add software trigger USB device suspend resume function hook. Do port suspend & resume in terms of xHCI spec. Port Suspend: Stop all endpoints via Stop Endpoint Command with Suspend (SP) flag set. Place individual ports into suspend mode by writing '3' for Port Link State (PLS) field into PORTSC register. This can only be done when the port is in Enabled state. When writing, the Port Link State Write Strobe (LWS) bit shall be set to '1'. Allocate an xhci_command and stash it in xhci_virt_device to wait completion for the last Stop Endpoint Command. Use the Suspend bit in TRB to indicate the Stop Endpoint Command is for port suspend. Based on Sarah's suggestion. Port Resume: Write '0' in PLS field, device will transition to running state. Ring an endpoints' doorbell to restart it. Ref: USB device remote wake need another patch to implement. For details of how USB subsystem do power management, please see: Documentation/usb/power-management.txt Signed-off-by: Crane Cai <crane.cai@amd.com> Signed-off-by: Libin Yang <libin.yang@amd.com> Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:57 +00:00
xhci_queue_stop_endpoint(xhci, urb->dev->slot_id, ep_index, 0);
USB: xhci: Avoid global namespace pollution. Make all globally visible functions start with xhci_ and mark functions as static if they're only called within the same C file. Fix some long lines while we're at it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:05:20 +00:00
xhci_ring_cmd_db(xhci);
USB: xhci: URB cancellation support. Add URB cancellation support to the xHCI host controller driver. This currently supports cancellation for endpoints that do not have streams enabled. An URB is represented by a number of Transaction Request Buffers (TRBs), that are chained together to make one (or more) Transaction Descriptors (TDs) on an endpoint ring. The ring is comprised of contiguous segments, linked together with Link TRBs (which may or may not be chained into a TD). To cancel an URB, we must stop the endpoint ring, make the hardware skip over the TDs in the URB (either by turning them into No-op TDs, or by moving the hardware's ring dequeue pointer past the last TRB in the last TD), and then restart the ring. There are times when we must drop the xHCI lock during this process, like when we need to complete cancelled URBs. We must ensure that additional URBs can be marked as cancelled, and that new URBs can be enqueued (since the URB completion handlers can do either). The new endpoint ring variables cancels_pending and state (which can only be modified while holding the xHCI lock) ensure that future cancellation and enqueueing do not interrupt any pending cancellation code. To facilitate cancellation, we must keep track of the starting ring segment, first TRB, and last TRB for each URB. We also need to keep track of the list of TDs that have been marked as cancelled, separate from the list of TDs that are queued for this endpoint. The new variables and cancellation list are stored in the xhci_td structure. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:02:31 +00:00
}
done:
spin_unlock_irqrestore(&xhci->lock, flags);
return ret;
USB: xhci: Control transfer support. Allow device drivers to enqueue URBs to control endpoints on devices under an xHCI host controller. Each control transfer is represented by a series of Transfer Descriptors (TDs) written to an endpoint ring. There is one TD for the Setup phase, (optionally) one TD for the Data phase, and one TD for the Status phase. Enqueue these TDs onto the endpoint ring that represents the control endpoint. The host controller hardware will return an event on the event ring that points to the (DMA) address of one of the TDs on the endpoint ring. If the transfer was successful, the transfer event TRB will have a completion code of success, and it will point to the Status phase TD. Anything else is considered an error. This should work for control endpoints besides the default endpoint, but that hasn't been tested. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:01 +00:00
}
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
/* Drop an endpoint from a new bandwidth configuration for this device.
* Only one call to this function is allowed per endpoint before
* check_bandwidth() or reset_bandwidth() must be called.
* A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will
* add the endpoint to the schedule with possibly new parameters denoted by a
* different endpoint descriptor in usb_host_endpoint.
* A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is
* not allowed.
USB: xhci: Respect critical sections. Narrow down time spent holding the xHCI spinlock so that it's only used to protect the xHCI rings, not as mutual exclusion. Stop allocating memory while holding the spinlock and calling xhci_alloc_virt_device() and xhci_endpoint_init(). The USB core should have locking in it to prevent device state to be manipulated by more than one kernel thread. E.g. you can't free a device while you're in the middle of setting a new configuration. So removing the locks from the sections where xhci_alloc_dev() and xhci_reset_bandwidth() touch xHCI's representation of the device should be OK. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-05-14 18:44:22 +00:00
*
* The USB core will not allow URBs to be queued to an endpoint that is being
* disabled, so there's no need for mutual exclusion to protect
* the xhci->devs[slot_id] structure.
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
*/
int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
struct usb_host_endpoint *ep)
{
struct xhci_hcd *xhci;
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
struct xhci_container_ctx *in_ctx, *out_ctx;
struct xhci_input_control_ctx *ctrl_ctx;
struct xhci_slot_ctx *slot_ctx;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
unsigned int last_ctx;
unsigned int ep_index;
struct xhci_ep_ctx *ep_ctx;
u32 drop_flag;
u32 new_add_flags, new_drop_flags, new_slot_info;
int ret;
USB: xHCI: Add pointer to udev in struct xhci_virt_device Add a pointer to udev in struct xhci_virt_device. When allocate a new virt_device, make the pointer point to the corresponding udev. Modify xhci_check_args(), check if virt_dev->udev matches the target udev, to make sure command is issued to the right device. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:45 +00:00
ret = xhci_check_args(hcd, udev, ep, 1, true, __func__);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
if (ret <= 0)
return ret;
xhci = hcd_to_xhci(hcd);
USB: xhci: fix lots of compiler warnings. Turns out someone never built this code on a 64bit platform. Someone owes me a beer... Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:14:08 +00:00
xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
drop_flag = xhci_get_endpoint_flag(&ep->desc);
if (drop_flag == SLOT_FLAG || drop_flag == EP0_FLAG) {
xhci_dbg(xhci, "xHCI %s - can't drop slot or ep 0 %#x\n",
__func__, drop_flag);
return 0;
}
in_ctx = xhci->devs[udev->slot_id]->in_ctx;
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
out_ctx = xhci->devs[udev->slot_id]->out_ctx;
ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
ep_index = xhci_get_endpoint_index(&ep->desc);
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
/* If the HC already knows the endpoint is disabled,
* or the HCD has noted it is disabled, ignore this request
*/
if ((ep_ctx->ep_info & EP_STATE_MASK) == EP_STATE_DISABLED ||
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
ctrl_ctx->drop_flags & xhci_get_endpoint_flag(&ep->desc)) {
USB: xhci: fix lots of compiler warnings. Turns out someone never built this code on a 64bit platform. Someone owes me a beer... Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:14:08 +00:00
xhci_warn(xhci, "xHCI %s called with disabled ep %p\n",
__func__, ep);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
return 0;
}
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
ctrl_ctx->drop_flags |= drop_flag;
new_drop_flags = ctrl_ctx->drop_flags;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
USB: xhci: Fix dropping endpoints from the xHC schedule. When an endpoint is to be dropped from the hardware bandwidth schedule, we want to clear its add flag. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-18 15:55:12 +00:00
ctrl_ctx->add_flags &= ~drop_flag;
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
new_add_flags = ctrl_ctx->add_flags;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
last_ctx = xhci_last_valid_endpoint(ctrl_ctx->add_flags);
slot_ctx = xhci_get_slot_ctx(xhci, in_ctx);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
/* Update the last valid endpoint context, if we deleted the last one */
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
if ((slot_ctx->dev_info & LAST_CTX_MASK) > LAST_CTX(last_ctx)) {
slot_ctx->dev_info &= ~LAST_CTX_MASK;
slot_ctx->dev_info |= LAST_CTX(last_ctx);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
}
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
new_slot_info = slot_ctx->dev_info;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
xhci_endpoint_zero(xhci, xhci->devs[udev->slot_id], ep);
xhci_dbg(xhci, "drop ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n",
(unsigned int) ep->desc.bEndpointAddress,
udev->slot_id,
(unsigned int) new_drop_flags,
(unsigned int) new_add_flags,
(unsigned int) new_slot_info);
return 0;
}
/* Add an endpoint to a new possible bandwidth configuration for this device.
* Only one call to this function is allowed per endpoint before
* check_bandwidth() or reset_bandwidth() must be called.
* A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will
* add the endpoint to the schedule with possibly new parameters denoted by a
* different endpoint descriptor in usb_host_endpoint.
* A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is
* not allowed.
USB: xhci: Respect critical sections. Narrow down time spent holding the xHCI spinlock so that it's only used to protect the xHCI rings, not as mutual exclusion. Stop allocating memory while holding the spinlock and calling xhci_alloc_virt_device() and xhci_endpoint_init(). The USB core should have locking in it to prevent device state to be manipulated by more than one kernel thread. E.g. you can't free a device while you're in the middle of setting a new configuration. So removing the locks from the sections where xhci_alloc_dev() and xhci_reset_bandwidth() touch xHCI's representation of the device should be OK. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-05-14 18:44:22 +00:00
*
* The USB core will not allow URBs to be queued to an endpoint until the
* configuration or alt setting is installed in the device, so there's no need
* for mutual exclusion to protect the xhci->devs[slot_id] structure.
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
*/
int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
struct usb_host_endpoint *ep)
{
struct xhci_hcd *xhci;
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
struct xhci_container_ctx *in_ctx, *out_ctx;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
unsigned int ep_index;
struct xhci_ep_ctx *ep_ctx;
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
struct xhci_slot_ctx *slot_ctx;
struct xhci_input_control_ctx *ctrl_ctx;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
u32 added_ctxs;
unsigned int last_ctx;
u32 new_add_flags, new_drop_flags, new_slot_info;
int ret = 0;
USB: xHCI: Add pointer to udev in struct xhci_virt_device Add a pointer to udev in struct xhci_virt_device. When allocate a new virt_device, make the pointer point to the corresponding udev. Modify xhci_check_args(), check if virt_dev->udev matches the target udev, to make sure command is issued to the right device. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:45 +00:00
ret = xhci_check_args(hcd, udev, ep, 1, true, __func__);
USB: xhci: Deal with stalled endpoints. When an endpoint on a device under an xHCI host controller stalls, the host controller driver must let the hardware know that the USB core has successfully cleared the halt condition. The HCD submits a Reset Endpoint Command, which will clear the toggle bit for USB 2.0 devices, and set the sequence number to zero for USB 3.0 devices. The xHCI urb_enqueue will accept new URBs while the endpoint is halted, and will queue them to the hardware rings. However, the endpoint doorbell will not be rung until the Reset Endpoint Command completes. Don't queue a reset endpoint command for root hubs. khubd clears halt conditions on the roothub during the initialization process, but the roothub isn't a real device, so the xHCI host controller doesn't need to know about the cleared halt. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:15 +00:00
if (ret <= 0) {
/* So we won't queue a reset ep command for a root hub */
ep->hcpriv = NULL;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
return ret;
USB: xhci: Deal with stalled endpoints. When an endpoint on a device under an xHCI host controller stalls, the host controller driver must let the hardware know that the USB core has successfully cleared the halt condition. The HCD submits a Reset Endpoint Command, which will clear the toggle bit for USB 2.0 devices, and set the sequence number to zero for USB 3.0 devices. The xHCI urb_enqueue will accept new URBs while the endpoint is halted, and will queue them to the hardware rings. However, the endpoint doorbell will not be rung until the Reset Endpoint Command completes. Don't queue a reset endpoint command for root hubs. khubd clears halt conditions on the roothub during the initialization process, but the roothub isn't a real device, so the xHCI host controller doesn't need to know about the cleared halt. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:15 +00:00
}
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
xhci = hcd_to_xhci(hcd);
added_ctxs = xhci_get_endpoint_flag(&ep->desc);
last_ctx = xhci_last_valid_endpoint(added_ctxs);
if (added_ctxs == SLOT_FLAG || added_ctxs == EP0_FLAG) {
/* FIXME when we have to issue an evaluate endpoint command to
* deal with ep0 max packet size changing once we get the
* descriptors
*/
xhci_dbg(xhci, "xHCI %s - can't add slot or ep 0 %#x\n",
__func__, added_ctxs);
return 0;
}
in_ctx = xhci->devs[udev->slot_id]->in_ctx;
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
out_ctx = xhci->devs[udev->slot_id]->out_ctx;
ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
ep_index = xhci_get_endpoint_index(&ep->desc);
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
/* If the HCD has already noted the endpoint is enabled,
* ignore this request.
*/
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
if (ctrl_ctx->add_flags & xhci_get_endpoint_flag(&ep->desc)) {
USB: xhci: fix lots of compiler warnings. Turns out someone never built this code on a 64bit platform. Someone owes me a beer... Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:14:08 +00:00
xhci_warn(xhci, "xHCI %s called with enabled ep %p\n",
__func__, ep);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
return 0;
}
USB: xhci: Respect critical sections. Narrow down time spent holding the xHCI spinlock so that it's only used to protect the xHCI rings, not as mutual exclusion. Stop allocating memory while holding the spinlock and calling xhci_alloc_virt_device() and xhci_endpoint_init(). The USB core should have locking in it to prevent device state to be manipulated by more than one kernel thread. E.g. you can't free a device while you're in the middle of setting a new configuration. So removing the locks from the sections where xhci_alloc_dev() and xhci_reset_bandwidth() touch xHCI's representation of the device should be OK. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-05-14 18:44:22 +00:00
/*
* Configuration and alternate setting changes must be done in
* process context, not interrupt context (or so documenation
* for usb_set_interface() and usb_set_configuration() claim).
*/
if (xhci_endpoint_init(xhci, xhci->devs[udev->slot_id],
USB: xhci: No GFP_KERNEL in block error handling xhci_add_endpoint() is used in the reset path. It must use GFP_NOIO to avoid a possible deadlock. Signed-off-by: Oliver Neukum <oliver@neukum.org> Acked-by: Sarah Sharp <sarah.a.sharp@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-16 18:43:59 +00:00
udev, ep, GFP_NOIO) < 0) {
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
dev_dbg(&udev->dev, "%s - could not initialize ep %#x\n",
__func__, ep->desc.bEndpointAddress);
return -ENOMEM;
}
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
ctrl_ctx->add_flags |= added_ctxs;
new_add_flags = ctrl_ctx->add_flags;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
/* If xhci_endpoint_disable() was called for this endpoint, but the
* xHC hasn't been notified yet through the check_bandwidth() call,
* this re-adds a new state for the endpoint from the new endpoint
* descriptors. We must drop and re-add this endpoint, so we leave the
* drop flags alone.
*/
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
new_drop_flags = ctrl_ctx->drop_flags;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
slot_ctx = xhci_get_slot_ctx(xhci, in_ctx);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
/* Update the last valid endpoint context, if we just added one past */
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
if ((slot_ctx->dev_info & LAST_CTX_MASK) < LAST_CTX(last_ctx)) {
slot_ctx->dev_info &= ~LAST_CTX_MASK;
slot_ctx->dev_info |= LAST_CTX(last_ctx);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
}
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
new_slot_info = slot_ctx->dev_info;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
USB: xhci: Deal with stalled endpoints. When an endpoint on a device under an xHCI host controller stalls, the host controller driver must let the hardware know that the USB core has successfully cleared the halt condition. The HCD submits a Reset Endpoint Command, which will clear the toggle bit for USB 2.0 devices, and set the sequence number to zero for USB 3.0 devices. The xHCI urb_enqueue will accept new URBs while the endpoint is halted, and will queue them to the hardware rings. However, the endpoint doorbell will not be rung until the Reset Endpoint Command completes. Don't queue a reset endpoint command for root hubs. khubd clears halt conditions on the roothub during the initialization process, but the roothub isn't a real device, so the xHCI host controller doesn't need to know about the cleared halt. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:15 +00:00
/* Store the usb_device pointer for later use */
ep->hcpriv = udev;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
xhci_dbg(xhci, "add ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n",
(unsigned int) ep->desc.bEndpointAddress,
udev->slot_id,
(unsigned int) new_drop_flags,
(unsigned int) new_add_flags,
(unsigned int) new_slot_info);
return 0;
}
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
static void xhci_zero_in_ctx(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev)
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
{
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
struct xhci_input_control_ctx *ctrl_ctx;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
struct xhci_ep_ctx *ep_ctx;
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
struct xhci_slot_ctx *slot_ctx;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
int i;
/* When a device's add flag and drop flag are zero, any subsequent
* configure endpoint command will leave that endpoint's state
* untouched. Make sure we don't leave any old state in the input
* endpoint contexts.
*/
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx);
ctrl_ctx->drop_flags = 0;
ctrl_ctx->add_flags = 0;
slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
slot_ctx->dev_info &= ~LAST_CTX_MASK;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
/* Endpoint 0 is always valid */
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
slot_ctx->dev_info |= LAST_CTX(1);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
for (i = 1; i < 31; ++i) {
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, i);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
ep_ctx->ep_info = 0;
ep_ctx->ep_info2 = 0;
USB: xhci: Represent 64-bit addresses with one u64. There are several xHCI data structures that use two 32-bit fields to represent a 64-bit address. Since some architectures don't support 64-bit PCI writes, the fields need to be written in two 32-bit writes. The xHCI specification says that if a platform is incapable of generating 64-bit writes, software must write the low 32-bits first, then the high 32-bits. Hardware that supports 64-bit addressing will wait for the high 32-bit write before reading the revised value, and hardware that only supports 32-bit writes will ignore the high 32-bit write. Previous xHCI code represented 64-bit addresses with two u32 values. This lead to buggy code that would write the 32-bits in the wrong order, or forget to write the upper 32-bits. Change the two u32s to one u64 and create a function call to write all 64-bit addresses in the proper order. This new function could be modified in the future if all platforms support 64-bit writes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:31 +00:00
ep_ctx->deq = 0;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
ep_ctx->tx_info = 0;
}
}
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
static int xhci_configure_endpoint_result(struct xhci_hcd *xhci,
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
struct usb_device *udev, int *cmd_status)
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
{
int ret;
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
switch (*cmd_status) {
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
case COMP_ENOMEM:
dev_warn(&udev->dev, "Not enough host controller resources "
"for new device state.\n");
ret = -ENOMEM;
/* FIXME: can we allocate more resources for the HC? */
break;
case COMP_BW_ERR:
dev_warn(&udev->dev, "Not enough bandwidth "
"for new device state.\n");
ret = -ENOSPC;
/* FIXME: can we go back to the old state? */
break;
case COMP_TRB_ERR:
/* the HCD set up something wrong */
dev_warn(&udev->dev, "ERROR: Endpoint drop flag = 0, "
"add flag = 1, "
"and endpoint is not disabled.\n");
ret = -EINVAL;
break;
case COMP_SUCCESS:
dev_dbg(&udev->dev, "Successful Endpoint Configure command\n");
ret = 0;
break;
default:
xhci_err(xhci, "ERROR: unexpected command completion "
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
"code 0x%x.\n", *cmd_status);
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
ret = -EINVAL;
break;
}
return ret;
}
static int xhci_evaluate_context_result(struct xhci_hcd *xhci,
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
struct usb_device *udev, int *cmd_status)
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
{
int ret;
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
struct xhci_virt_device *virt_dev = xhci->devs[udev->slot_id];
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
switch (*cmd_status) {
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
case COMP_EINVAL:
dev_warn(&udev->dev, "WARN: xHCI driver setup invalid evaluate "
"context command.\n");
ret = -EINVAL;
break;
case COMP_EBADSLT:
dev_warn(&udev->dev, "WARN: slot not enabled for"
"evaluate context command.\n");
case COMP_CTX_STATE:
dev_warn(&udev->dev, "WARN: invalid context state for "
"evaluate context command.\n");
xhci_dbg_ctx(xhci, virt_dev->out_ctx, 1);
ret = -EINVAL;
break;
case COMP_SUCCESS:
dev_dbg(&udev->dev, "Successful evaluate context command\n");
ret = 0;
break;
default:
xhci_err(xhci, "ERROR: unexpected command completion "
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
"code 0x%x.\n", *cmd_status);
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
ret = -EINVAL;
break;
}
return ret;
}
/* Issue a configure endpoint command or evaluate context command
* and wait for it to finish.
*/
static int xhci_configure_endpoint(struct xhci_hcd *xhci,
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
struct usb_device *udev,
struct xhci_command *command,
bool ctx_change, bool must_succeed)
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
{
int ret;
int timeleft;
unsigned long flags;
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
struct xhci_container_ctx *in_ctx;
struct completion *cmd_completion;
int *cmd_status;
struct xhci_virt_device *virt_dev;
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
spin_lock_irqsave(&xhci->lock, flags);
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
virt_dev = xhci->devs[udev->slot_id];
if (command) {
in_ctx = command->in_ctx;
cmd_completion = command->completion;
cmd_status = &command->status;
command->command_trb = xhci->cmd_ring->enqueue;
xhci: Fix reset-device and configure-endpoint commands We have been having problems with the USB-IF Gold Tree tests when plugging and unplugging devices from the tree. I have seen that the reset-device and configure-endpoint commands, which are invoked from xhci_discover_or_reset_device() and xhci_configure_endpoint(), will sometimes time out. After much debugging, I determined that the commands themselves do not actually time out, but rather their completion events do not get delivered to the right place. This happens when the command ring has just wrapped around, and it's enqueue pointer is left pointing to the link TRB. xhci_discover_or_reset_device() and xhci_configure_endpoint() use the enqueue pointer directly as their command TRB pointer, without checking whether it's pointing to the link TRB. When the completion event arrives, if the command TRB is pointing to the link TRB, the check against the command ring dequeue pointer in handle_cmd_in_cmd_wait_list() fails, so the completion inside the command does not get signaled. The patch below fixes the timeout problem for me. This should be queued for the 2.6.35 and 2.6.36 stable trees. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org
2010-11-18 00:26:50 +00:00
/* Enqueue pointer can be left pointing to the link TRB,
* we must handle that
*/
if ((command->command_trb->link.control & TRB_TYPE_BITMASK)
== TRB_TYPE(TRB_LINK))
command->command_trb =
xhci->cmd_ring->enq_seg->next->trbs;
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
list_add_tail(&command->cmd_list, &virt_dev->cmd_list);
} else {
in_ctx = virt_dev->in_ctx;
cmd_completion = &virt_dev->cmd_completion;
cmd_status = &virt_dev->cmd_status;
}
USB: xHCI: re-initialize cmd_completion When a signal interrupts a Configure Endpoint command, the cmd_completion used in xhci_configure_endpoint() is not re-initialized and the wait_for_completion_interruptible_timeout() will return failure. Initialize cmd_completion in xhci_configure_endpoint(). Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-12 09:10:04 +00:00
init_completion(cmd_completion);
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
if (!ctx_change)
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
ret = xhci_queue_configure_endpoint(xhci, in_ctx->dma,
udev->slot_id, must_succeed);
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
else
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
ret = xhci_queue_evaluate_context(xhci, in_ctx->dma,
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
udev->slot_id);
if (ret < 0) {
USB: xhci: Fix error path when configuring endpoints. If we fail to queue an evaluate context command or a configure endpoint command to the command ring in xhci_configure_endpoint(), we need to remove the xhci_command structure from the device's command list before returning. If the command is left on the command list, it will sit there indefinitely, blocking commands submitted after this fails. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-09 23:58:58 +00:00
if (command)
list_del(&command->cmd_list);
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_dbg(xhci, "FIXME allocate a new ring segment\n");
return -ENOMEM;
}
xhci_ring_cmd_db(xhci);
spin_unlock_irqrestore(&xhci->lock, flags);
/* Wait for the configure endpoint command to complete */
timeleft = wait_for_completion_interruptible_timeout(
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
cmd_completion,
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
USB_CTRL_SET_TIMEOUT);
if (timeleft <= 0) {
xhci_warn(xhci, "%s while waiting for %s command\n",
timeleft == 0 ? "Timeout" : "Signal",
ctx_change == 0 ?
"configure endpoint" :
"evaluate context");
/* FIXME cancel the configure endpoint command */
return -ETIME;
}
if (!ctx_change)
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
return xhci_configure_endpoint_result(xhci, udev, cmd_status);
return xhci_evaluate_context_result(xhci, udev, cmd_status);
USB: xhci: Configure endpoint code refactoring. Refactor out the code issue, wait for, and parse the event completion code for a configure endpoint command. Modify it to support the evaluate context command, which has a very similar submission process. Add functions to copy parts of the output context into the input context (which will be used in the evaluate context command). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:43 +00:00
}
USB: xhci: Respect critical sections. Narrow down time spent holding the xHCI spinlock so that it's only used to protect the xHCI rings, not as mutual exclusion. Stop allocating memory while holding the spinlock and calling xhci_alloc_virt_device() and xhci_endpoint_init(). The USB core should have locking in it to prevent device state to be manipulated by more than one kernel thread. E.g. you can't free a device while you're in the middle of setting a new configuration. So removing the locks from the sections where xhci_alloc_dev() and xhci_reset_bandwidth() touch xHCI's representation of the device should be OK. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-05-14 18:44:22 +00:00
/* Called after one or more calls to xhci_add_endpoint() or
* xhci_drop_endpoint(). If this call fails, the USB core is expected
* to call xhci_reset_bandwidth().
*
* Since we are in the middle of changing either configuration or
* installing a new alt setting, the USB core won't allow URBs to be
* enqueued for any endpoint on the old config or interface. Nothing
* else should be touching the xhci->devs[slot_id] structure, so we
* don't need to take the xhci->lock for manipulating that.
*/
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
{
int i;
int ret = 0;
struct xhci_hcd *xhci;
struct xhci_virt_device *virt_dev;
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
struct xhci_input_control_ctx *ctrl_ctx;
struct xhci_slot_ctx *slot_ctx;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
USB: xHCI: Add pointer to udev in struct xhci_virt_device Add a pointer to udev in struct xhci_virt_device. When allocate a new virt_device, make the pointer point to the corresponding udev. Modify xhci_check_args(), check if virt_dev->udev matches the target udev, to make sure command is issued to the right device. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:45 +00:00
ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
if (ret <= 0)
return ret;
xhci = hcd_to_xhci(hcd);
USB: xhci: fix lots of compiler warnings. Turns out someone never built this code on a 64bit platform. Someone owes me a beer... Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:14:08 +00:00
xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
virt_dev = xhci->devs[udev->slot_id];
/* See section 4.6.6 - A0 = 1; A1 = D0 = D1 = 0 */
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx);
ctrl_ctx->add_flags |= SLOT_FLAG;
ctrl_ctx->add_flags &= ~EP0_FLAG;
ctrl_ctx->drop_flags &= ~SLOT_FLAG;
ctrl_ctx->drop_flags &= ~EP0_FLAG;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
xhci_dbg(xhci, "New Input Control Context:\n");
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
xhci_dbg_ctx(xhci, virt_dev->in_ctx,
LAST_CTX_TO_EP_NUM(slot_ctx->dev_info));
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
ret = xhci_configure_endpoint(xhci, udev, NULL,
false, false);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
if (ret) {
/* Callee should call reset_bandwidth() */
return ret;
}
xhci_dbg(xhci, "Output context after successful config ep cmd:\n");
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
xhci_dbg_ctx(xhci, virt_dev->out_ctx,
LAST_CTX_TO_EP_NUM(slot_ctx->dev_info));
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
xhci_zero_in_ctx(xhci, virt_dev);
USB: xhci: Make reverting an alt setting "unfailable". When a driver wants to switch to a different alternate setting for an interface, the USB core will (soon) check whether there is enough bandwidth. Once the new alternate setting is installed in the xHCI hardware, the USB core will send a USB_REQ_SET_INTERFACE control message. That can fail in various ways, and the USB core needs to be able to reinstate the old alternate setting. With the old code, reinstating the old alt setting could fail if the there's not enough memory to allocate new endpoint rings. Keep around a cache of (at most 31) endpoint rings for this case. When we successfully switch the xHCI hardware to the new alt setting, the old alt setting's rings will be stored in the cache. Therefore we'll always have enough rings to satisfy a conversion back to a previous device setting. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 17:44:29 +00:00
/* Install new rings and free or cache any old rings */
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
for (i = 1; i < 31; ++i) {
USB: xhci: Make reverting an alt setting "unfailable". When a driver wants to switch to a different alternate setting for an interface, the USB core will (soon) check whether there is enough bandwidth. Once the new alternate setting is installed in the xHCI hardware, the USB core will send a USB_REQ_SET_INTERFACE control message. That can fail in various ways, and the USB core needs to be able to reinstate the old alternate setting. With the old code, reinstating the old alt setting could fail if the there's not enough memory to allocate new endpoint rings. Keep around a cache of (at most 31) endpoint rings for this case. When we successfully switch the xHCI hardware to the new alt setting, the old alt setting's rings will be stored in the cache. Therefore we'll always have enough rings to satisfy a conversion back to a previous device setting. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 17:44:29 +00:00
if (!virt_dev->eps[i].new_ring)
continue;
/* Only cache or free the old ring if it exists.
* It may not if this is the first add of an endpoint.
*/
if (virt_dev->eps[i].ring) {
USB: xhci: Refactor code to free or cache endpoint rings. Refactor out the code to cache or free endpoint rings from recently dropped or disabled endpoints. This code will be used by a new function to reset a device and disable all endpoints except control endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-09 23:59:01 +00:00
xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
}
USB: xhci: Make reverting an alt setting "unfailable". When a driver wants to switch to a different alternate setting for an interface, the USB core will (soon) check whether there is enough bandwidth. Once the new alternate setting is installed in the xHCI hardware, the USB core will send a USB_REQ_SET_INTERFACE control message. That can fail in various ways, and the USB core needs to be able to reinstate the old alternate setting. With the old code, reinstating the old alt setting could fail if the there's not enough memory to allocate new endpoint rings. Keep around a cache of (at most 31) endpoint rings for this case. When we successfully switch the xHCI hardware to the new alt setting, the old alt setting's rings will be stored in the cache. Therefore we'll always have enough rings to satisfy a conversion back to a previous device setting. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 17:44:29 +00:00
virt_dev->eps[i].ring = virt_dev->eps[i].new_ring;
virt_dev->eps[i].new_ring = NULL;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
}
return ret;
}
void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
{
struct xhci_hcd *xhci;
struct xhci_virt_device *virt_dev;
int i, ret;
USB: xHCI: Add pointer to udev in struct xhci_virt_device Add a pointer to udev in struct xhci_virt_device. When allocate a new virt_device, make the pointer point to the corresponding udev. Modify xhci_check_args(), check if virt_dev->udev matches the target udev, to make sure command is issued to the right device. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:45 +00:00
ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
if (ret <= 0)
return;
xhci = hcd_to_xhci(hcd);
USB: xhci: fix lots of compiler warnings. Turns out someone never built this code on a 64bit platform. Someone owes me a beer... Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:14:08 +00:00
xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
virt_dev = xhci->devs[udev->slot_id];
/* Free any rings allocated for added endpoints */
for (i = 0; i < 31; ++i) {
USB: xhci: Endpoint representation refactoring. The xhci_ring structure contained information that is really related to an endpoint, not a ring. This will cause problems later when endpoint streams are supported and there are multiple rings per endpoint. Move the endpoint state and cancellation information into a new virtual endpoint structure, xhci_virt_ep. The list of TRBs to be cancelled should be per endpoint, not per ring, for easy access. There can be only one TRB that the endpoint stopped on after a stop endpoint command (even with streams enabled); move the stopped TRB information into the new virtual endpoint structure. Also move the 31 endpoint rings and temporary ring storage from the virtual device structure (xhci_virt_device) into the virtual endpoint structure (xhci_virt_ep). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:09 +00:00
if (virt_dev->eps[i].new_ring) {
xhci_ring_free(xhci, virt_dev->eps[i].new_ring);
virt_dev->eps[i].new_ring = NULL;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
}
}
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
xhci_zero_in_ctx(xhci, virt_dev);
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
}
USB: xhci: Refactor input device context setup. Refactor common code to set up the add and drop flags for the input device context setup. This setup is used before a configure endpoint command for the reset endpoint quirk, and will be used for the command to alloc or free streams rings. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:11 +00:00
static void xhci_setup_input_ctx_for_config_ep(struct xhci_hcd *xhci,
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
struct xhci_container_ctx *in_ctx,
struct xhci_container_ctx *out_ctx,
u32 add_flags, u32 drop_flags)
USB: xhci: Refactor input device context setup. Refactor common code to set up the add and drop flags for the input device context setup. This setup is used before a configure endpoint command for the reset endpoint quirk, and will be used for the command to alloc or free streams rings. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:11 +00:00
{
struct xhci_input_control_ctx *ctrl_ctx;
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx);
USB: xhci: Refactor input device context setup. Refactor common code to set up the add and drop flags for the input device context setup. This setup is used before a configure endpoint command for the reset endpoint quirk, and will be used for the command to alloc or free streams rings. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:11 +00:00
ctrl_ctx->add_flags = add_flags;
ctrl_ctx->drop_flags = drop_flags;
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
xhci_slot_copy(xhci, in_ctx, out_ctx);
USB: xhci: Refactor input device context setup. Refactor common code to set up the add and drop flags for the input device context setup. This setup is used before a configure endpoint command for the reset endpoint quirk, and will be used for the command to alloc or free streams rings. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:11 +00:00
ctrl_ctx->add_flags |= SLOT_FLAG;
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
xhci_dbg(xhci, "Input Context:\n");
xhci_dbg_ctx(xhci, in_ctx, xhci_last_valid_endpoint(add_flags));
USB: xhci: Refactor input device context setup. Refactor common code to set up the add and drop flags for the input device context setup. This setup is used before a configure endpoint command for the reset endpoint quirk, and will be used for the command to alloc or free streams rings. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:11 +00:00
}
USB: xhci: Add quirk for Fresco Logic xHCI hardware. This Fresco Logic xHCI host controller chip revision puts bad data into the output endpoint context after a Reset Endpoint command. It needs a Configure Endpoint command (instead of a Set TR Dequeue Pointer command) after the reset endpoint command. Set up the input context before issuing the Reset Endpoint command so we don't copy bad data from the output endpoint context. The HW also can't handle two commands queued at once, so submit the TRB for the Configure Endpoint command in the event handler for the Reset Endpoint command. Devices that stall on control endpoints before a configuration is selected will not work under this Fresco Logic xHCI host controller revision. This patch is for prototype hardware that will be given to other companies for evaluation purposes only, and should not reach consumer hands. Fresco Logic's next chip rev should have this bug fixed. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:55 +00:00
void xhci_setup_input_ctx_for_quirk(struct xhci_hcd *xhci,
unsigned int slot_id, unsigned int ep_index,
struct xhci_dequeue_state *deq_state)
{
struct xhci_container_ctx *in_ctx;
struct xhci_ep_ctx *ep_ctx;
u32 added_ctxs;
dma_addr_t addr;
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx,
xhci->devs[slot_id]->out_ctx, ep_index);
USB: xhci: Add quirk for Fresco Logic xHCI hardware. This Fresco Logic xHCI host controller chip revision puts bad data into the output endpoint context after a Reset Endpoint command. It needs a Configure Endpoint command (instead of a Set TR Dequeue Pointer command) after the reset endpoint command. Set up the input context before issuing the Reset Endpoint command so we don't copy bad data from the output endpoint context. The HW also can't handle two commands queued at once, so submit the TRB for the Configure Endpoint command in the event handler for the Reset Endpoint command. Devices that stall on control endpoints before a configuration is selected will not work under this Fresco Logic xHCI host controller revision. This patch is for prototype hardware that will be given to other companies for evaluation purposes only, and should not reach consumer hands. Fresco Logic's next chip rev should have this bug fixed. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:55 +00:00
in_ctx = xhci->devs[slot_id]->in_ctx;
ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index);
addr = xhci_trb_virt_to_dma(deq_state->new_deq_seg,
deq_state->new_deq_ptr);
if (addr == 0) {
xhci_warn(xhci, "WARN Cannot submit config ep after "
"reset ep command\n");
xhci_warn(xhci, "WARN deq seg = %p, deq ptr = %p\n",
deq_state->new_deq_seg,
deq_state->new_deq_ptr);
return;
}
ep_ctx->deq = addr | deq_state->new_cycle_state;
added_ctxs = xhci_get_endpoint_flag_from_index(ep_index);
USB: xhci: Change how xHCI commands are handled. Some commands to the xHCI hardware cannot be allowed to fail due to out of memory issues or the command ring being full. Add a way to reserve a TRB on the command ring, and make all command queueing functions indicate whether they are using a reserved TRB. Add a way to pre-allocate all the memory a command might need. A command needs an input context, a variable to store the status, and (optionally) a completion for the caller to wait on. Change all code that assumes the input device context, status, and completion for a command is stored in the xhci virtual USB device structure (xhci_virt_device). Store pending completions in a FIFO in xhci_virt_device. Make the event handler for a configure endpoint command check to see whether a pending command in the list has completed. We need to use separate input device contexts for some configure endpoint commands, since multiple drivers can submit requests at the same time that require a configure endpoint command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:13 +00:00
xhci_setup_input_ctx_for_config_ep(xhci, xhci->devs[slot_id]->in_ctx,
xhci->devs[slot_id]->out_ctx, added_ctxs, added_ctxs);
USB: xhci: Add quirk for Fresco Logic xHCI hardware. This Fresco Logic xHCI host controller chip revision puts bad data into the output endpoint context after a Reset Endpoint command. It needs a Configure Endpoint command (instead of a Set TR Dequeue Pointer command) after the reset endpoint command. Set up the input context before issuing the Reset Endpoint command so we don't copy bad data from the output endpoint context. The HW also can't handle two commands queued at once, so submit the TRB for the Configure Endpoint command in the event handler for the Reset Endpoint command. Devices that stall on control endpoints before a configuration is selected will not work under this Fresco Logic xHCI host controller revision. This patch is for prototype hardware that will be given to other companies for evaluation purposes only, and should not reach consumer hands. Fresco Logic's next chip rev should have this bug fixed. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:55 +00:00
}
USB: xhci: Handle stalled control endpoints. When a control endpoint stalls, the next control transfer will clear the stall. The USB core doesn't call down to the host controller driver's endpoint_reset() method when control endpoints stall, so the xHCI driver has to do all its stall handling for internal state in its interrupt handler. When the host stalls on a control endpoint, it may stop on the data phase or status phase of the control transfer. Like other stalled endpoints, the xHCI driver needs to queue a Reset Endpoint command and move the hardware's control endpoint ring dequeue pointer past the failed control transfer (with a Set TR Dequeue Pointer or a Configure Endpoint command). Since the USB core doesn't call usb_hcd_reset_endpoint() for control endpoints, we need to do this in interrupt context when we get notified of the stalled transfer. URBs may be queued to the hardware before these two commands complete. The endpoint queue will be restarted once both commands complete. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:52 +00:00
void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci,
USB: xhci: Endpoint representation refactoring. The xhci_ring structure contained information that is really related to an endpoint, not a ring. This will cause problems later when endpoint streams are supported and there are multiple rings per endpoint. Move the endpoint state and cancellation information into a new virtual endpoint structure, xhci_virt_ep. The list of TRBs to be cancelled should be per endpoint, not per ring, for easy access. There can be only one TRB that the endpoint stopped on after a stop endpoint command (even with streams enabled); move the stopped TRB information into the new virtual endpoint structure. Also move the 31 endpoint rings and temporary ring storage from the virtual device structure (xhci_virt_device) into the virtual endpoint structure (xhci_virt_ep). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:09 +00:00
struct usb_device *udev, unsigned int ep_index)
USB: xhci: Handle stalled control endpoints. When a control endpoint stalls, the next control transfer will clear the stall. The USB core doesn't call down to the host controller driver's endpoint_reset() method when control endpoints stall, so the xHCI driver has to do all its stall handling for internal state in its interrupt handler. When the host stalls on a control endpoint, it may stop on the data phase or status phase of the control transfer. Like other stalled endpoints, the xHCI driver needs to queue a Reset Endpoint command and move the hardware's control endpoint ring dequeue pointer past the failed control transfer (with a Set TR Dequeue Pointer or a Configure Endpoint command). Since the USB core doesn't call usb_hcd_reset_endpoint() for control endpoints, we need to do this in interrupt context when we get notified of the stalled transfer. URBs may be queued to the hardware before these two commands complete. The endpoint queue will be restarted once both commands complete. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:52 +00:00
{
struct xhci_dequeue_state deq_state;
USB: xhci: Endpoint representation refactoring. The xhci_ring structure contained information that is really related to an endpoint, not a ring. This will cause problems later when endpoint streams are supported and there are multiple rings per endpoint. Move the endpoint state and cancellation information into a new virtual endpoint structure, xhci_virt_ep. The list of TRBs to be cancelled should be per endpoint, not per ring, for easy access. There can be only one TRB that the endpoint stopped on after a stop endpoint command (even with streams enabled); move the stopped TRB information into the new virtual endpoint structure. Also move the 31 endpoint rings and temporary ring storage from the virtual device structure (xhci_virt_device) into the virtual endpoint structure (xhci_virt_ep). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:09 +00:00
struct xhci_virt_ep *ep;
USB: xhci: Handle stalled control endpoints. When a control endpoint stalls, the next control transfer will clear the stall. The USB core doesn't call down to the host controller driver's endpoint_reset() method when control endpoints stall, so the xHCI driver has to do all its stall handling for internal state in its interrupt handler. When the host stalls on a control endpoint, it may stop on the data phase or status phase of the control transfer. Like other stalled endpoints, the xHCI driver needs to queue a Reset Endpoint command and move the hardware's control endpoint ring dequeue pointer past the failed control transfer (with a Set TR Dequeue Pointer or a Configure Endpoint command). Since the USB core doesn't call usb_hcd_reset_endpoint() for control endpoints, we need to do this in interrupt context when we get notified of the stalled transfer. URBs may be queued to the hardware before these two commands complete. The endpoint queue will be restarted once both commands complete. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:52 +00:00
xhci_dbg(xhci, "Cleaning up stalled endpoint ring\n");
USB: xhci: Endpoint representation refactoring. The xhci_ring structure contained information that is really related to an endpoint, not a ring. This will cause problems later when endpoint streams are supported and there are multiple rings per endpoint. Move the endpoint state and cancellation information into a new virtual endpoint structure, xhci_virt_ep. The list of TRBs to be cancelled should be per endpoint, not per ring, for easy access. There can be only one TRB that the endpoint stopped on after a stop endpoint command (even with streams enabled); move the stopped TRB information into the new virtual endpoint structure. Also move the 31 endpoint rings and temporary ring storage from the virtual device structure (xhci_virt_device) into the virtual endpoint structure (xhci_virt_ep). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:09 +00:00
ep = &xhci->devs[udev->slot_id]->eps[ep_index];
USB: xhci: Handle stalled control endpoints. When a control endpoint stalls, the next control transfer will clear the stall. The USB core doesn't call down to the host controller driver's endpoint_reset() method when control endpoints stall, so the xHCI driver has to do all its stall handling for internal state in its interrupt handler. When the host stalls on a control endpoint, it may stop on the data phase or status phase of the control transfer. Like other stalled endpoints, the xHCI driver needs to queue a Reset Endpoint command and move the hardware's control endpoint ring dequeue pointer past the failed control transfer (with a Set TR Dequeue Pointer or a Configure Endpoint command). Since the USB core doesn't call usb_hcd_reset_endpoint() for control endpoints, we need to do this in interrupt context when we get notified of the stalled transfer. URBs may be queued to the hardware before these two commands complete. The endpoint queue will be restarted once both commands complete. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:52 +00:00
/* We need to move the HW's dequeue pointer past this TD,
* or it will attempt to resend it on the next doorbell ring.
*/
xhci_find_new_dequeue_state(xhci, udev->slot_id,
USB: xhci: Correct assumptions about number of rings per endpoint. Much of the xHCI driver code assumes that endpoints only have one ring. Now an endpoint can have one ring per enabled stream ID, so correct that assumption. Use functions that translate the stream_id field in the URB or the DMA address of a TRB into the correct stream ring. Correct the polling loop to print out all enabled stream rings. Make the URB cancellation routine find the correct stream ring if the URB has stream_id set. Make sure the URB enqueueing routine does the same. Also correct the code that handles stalled/halted endpoints. Check that commands and registers that can take stream IDs handle them properly. That includes ringing an endpoint doorbell, resetting a stalled/halted endpoint, and setting a transfer ring dequeue pointer (since that command can set the dequeue pointer in a stream context or an endpoint context). Correct the transfer event handler to translate a TRB DMA address into the stream ring it was enqueued to. Make the code to allocate and prepare TD structures adds the TD to the right td_list for the stream ring. Make sure the code to give the first TRB in a TD to the hardware manipulates the correct stream ring. When an endpoint stalls, store the stream ID of the stream ring that stalled in the xhci_virt_ep structure. Use that instead of the stream ID in the URB, since an URB may be re-used after it is given back after a non-control endpoint stall. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-02 22:34:43 +00:00
ep_index, ep->stopped_stream, ep->stopped_td,
USB: xhci: Add quirk for Fresco Logic xHCI hardware. This Fresco Logic xHCI host controller chip revision puts bad data into the output endpoint context after a Reset Endpoint command. It needs a Configure Endpoint command (instead of a Set TR Dequeue Pointer command) after the reset endpoint command. Set up the input context before issuing the Reset Endpoint command so we don't copy bad data from the output endpoint context. The HW also can't handle two commands queued at once, so submit the TRB for the Configure Endpoint command in the event handler for the Reset Endpoint command. Devices that stall on control endpoints before a configuration is selected will not work under this Fresco Logic xHCI host controller revision. This patch is for prototype hardware that will be given to other companies for evaluation purposes only, and should not reach consumer hands. Fresco Logic's next chip rev should have this bug fixed. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:55 +00:00
&deq_state);
USB: xhci: Handle stalled control endpoints. When a control endpoint stalls, the next control transfer will clear the stall. The USB core doesn't call down to the host controller driver's endpoint_reset() method when control endpoints stall, so the xHCI driver has to do all its stall handling for internal state in its interrupt handler. When the host stalls on a control endpoint, it may stop on the data phase or status phase of the control transfer. Like other stalled endpoints, the xHCI driver needs to queue a Reset Endpoint command and move the hardware's control endpoint ring dequeue pointer past the failed control transfer (with a Set TR Dequeue Pointer or a Configure Endpoint command). Since the USB core doesn't call usb_hcd_reset_endpoint() for control endpoints, we need to do this in interrupt context when we get notified of the stalled transfer. URBs may be queued to the hardware before these two commands complete. The endpoint queue will be restarted once both commands complete. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:52 +00:00
USB: xhci: Add quirk for Fresco Logic xHCI hardware. This Fresco Logic xHCI host controller chip revision puts bad data into the output endpoint context after a Reset Endpoint command. It needs a Configure Endpoint command (instead of a Set TR Dequeue Pointer command) after the reset endpoint command. Set up the input context before issuing the Reset Endpoint command so we don't copy bad data from the output endpoint context. The HW also can't handle two commands queued at once, so submit the TRB for the Configure Endpoint command in the event handler for the Reset Endpoint command. Devices that stall on control endpoints before a configuration is selected will not work under this Fresco Logic xHCI host controller revision. This patch is for prototype hardware that will be given to other companies for evaluation purposes only, and should not reach consumer hands. Fresco Logic's next chip rev should have this bug fixed. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:55 +00:00
/* HW with the reset endpoint quirk will use the saved dequeue state to
* issue a configure endpoint command later.
*/
if (!(xhci->quirks & XHCI_RESET_EP_QUIRK)) {
xhci_dbg(xhci, "Queueing new dequeue state\n");
USB: xhci: Endpoint representation refactoring. The xhci_ring structure contained information that is really related to an endpoint, not a ring. This will cause problems later when endpoint streams are supported and there are multiple rings per endpoint. Move the endpoint state and cancellation information into a new virtual endpoint structure, xhci_virt_ep. The list of TRBs to be cancelled should be per endpoint, not per ring, for easy access. There can be only one TRB that the endpoint stopped on after a stop endpoint command (even with streams enabled); move the stopped TRB information into the new virtual endpoint structure. Also move the 31 endpoint rings and temporary ring storage from the virtual device structure (xhci_virt_device) into the virtual endpoint structure (xhci_virt_ep). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:09 +00:00
xhci_queue_new_dequeue_state(xhci, udev->slot_id,
USB: xhci: Correct assumptions about number of rings per endpoint. Much of the xHCI driver code assumes that endpoints only have one ring. Now an endpoint can have one ring per enabled stream ID, so correct that assumption. Use functions that translate the stream_id field in the URB or the DMA address of a TRB into the correct stream ring. Correct the polling loop to print out all enabled stream rings. Make the URB cancellation routine find the correct stream ring if the URB has stream_id set. Make sure the URB enqueueing routine does the same. Also correct the code that handles stalled/halted endpoints. Check that commands and registers that can take stream IDs handle them properly. That includes ringing an endpoint doorbell, resetting a stalled/halted endpoint, and setting a transfer ring dequeue pointer (since that command can set the dequeue pointer in a stream context or an endpoint context). Correct the transfer event handler to translate a TRB DMA address into the stream ring it was enqueued to. Make the code to allocate and prepare TD structures adds the TD to the right td_list for the stream ring. Make sure the code to give the first TRB in a TD to the hardware manipulates the correct stream ring. When an endpoint stalls, store the stream ID of the stream ring that stalled in the xhci_virt_ep structure. Use that instead of the stream ID in the URB, since an URB may be re-used after it is given back after a non-control endpoint stall. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-02 22:34:43 +00:00
ep_index, ep->stopped_stream, &deq_state);
USB: xhci: Add quirk for Fresco Logic xHCI hardware. This Fresco Logic xHCI host controller chip revision puts bad data into the output endpoint context after a Reset Endpoint command. It needs a Configure Endpoint command (instead of a Set TR Dequeue Pointer command) after the reset endpoint command. Set up the input context before issuing the Reset Endpoint command so we don't copy bad data from the output endpoint context. The HW also can't handle two commands queued at once, so submit the TRB for the Configure Endpoint command in the event handler for the Reset Endpoint command. Devices that stall on control endpoints before a configuration is selected will not work under this Fresco Logic xHCI host controller revision. This patch is for prototype hardware that will be given to other companies for evaluation purposes only, and should not reach consumer hands. Fresco Logic's next chip rev should have this bug fixed. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:55 +00:00
} else {
/* Better hope no one uses the input context between now and the
* reset endpoint completion!
USB: xhci: Correct assumptions about number of rings per endpoint. Much of the xHCI driver code assumes that endpoints only have one ring. Now an endpoint can have one ring per enabled stream ID, so correct that assumption. Use functions that translate the stream_id field in the URB or the DMA address of a TRB into the correct stream ring. Correct the polling loop to print out all enabled stream rings. Make the URB cancellation routine find the correct stream ring if the URB has stream_id set. Make sure the URB enqueueing routine does the same. Also correct the code that handles stalled/halted endpoints. Check that commands and registers that can take stream IDs handle them properly. That includes ringing an endpoint doorbell, resetting a stalled/halted endpoint, and setting a transfer ring dequeue pointer (since that command can set the dequeue pointer in a stream context or an endpoint context). Correct the transfer event handler to translate a TRB DMA address into the stream ring it was enqueued to. Make the code to allocate and prepare TD structures adds the TD to the right td_list for the stream ring. Make sure the code to give the first TRB in a TD to the hardware manipulates the correct stream ring. When an endpoint stalls, store the stream ID of the stream ring that stalled in the xhci_virt_ep structure. Use that instead of the stream ID in the URB, since an URB may be re-used after it is given back after a non-control endpoint stall. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-02 22:34:43 +00:00
* XXX: No idea how this hardware will react when stream rings
* are enabled.
USB: xhci: Add quirk for Fresco Logic xHCI hardware. This Fresco Logic xHCI host controller chip revision puts bad data into the output endpoint context after a Reset Endpoint command. It needs a Configure Endpoint command (instead of a Set TR Dequeue Pointer command) after the reset endpoint command. Set up the input context before issuing the Reset Endpoint command so we don't copy bad data from the output endpoint context. The HW also can't handle two commands queued at once, so submit the TRB for the Configure Endpoint command in the event handler for the Reset Endpoint command. Devices that stall on control endpoints before a configuration is selected will not work under this Fresco Logic xHCI host controller revision. This patch is for prototype hardware that will be given to other companies for evaluation purposes only, and should not reach consumer hands. Fresco Logic's next chip rev should have this bug fixed. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:55 +00:00
*/
xhci_dbg(xhci, "Setting up input context for "
"configure endpoint command\n");
xhci_setup_input_ctx_for_quirk(xhci, udev->slot_id,
ep_index, &deq_state);
}
USB: xhci: Handle stalled control endpoints. When a control endpoint stalls, the next control transfer will clear the stall. The USB core doesn't call down to the host controller driver's endpoint_reset() method when control endpoints stall, so the xHCI driver has to do all its stall handling for internal state in its interrupt handler. When the host stalls on a control endpoint, it may stop on the data phase or status phase of the control transfer. Like other stalled endpoints, the xHCI driver needs to queue a Reset Endpoint command and move the hardware's control endpoint ring dequeue pointer past the failed control transfer (with a Set TR Dequeue Pointer or a Configure Endpoint command). Since the USB core doesn't call usb_hcd_reset_endpoint() for control endpoints, we need to do this in interrupt context when we get notified of the stalled transfer. URBs may be queued to the hardware before these two commands complete. The endpoint queue will be restarted once both commands complete. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:52 +00:00
}
USB: xhci: Deal with stalled endpoints. When an endpoint on a device under an xHCI host controller stalls, the host controller driver must let the hardware know that the USB core has successfully cleared the halt condition. The HCD submits a Reset Endpoint Command, which will clear the toggle bit for USB 2.0 devices, and set the sequence number to zero for USB 3.0 devices. The xHCI urb_enqueue will accept new URBs while the endpoint is halted, and will queue them to the hardware rings. However, the endpoint doorbell will not be rung until the Reset Endpoint Command completes. Don't queue a reset endpoint command for root hubs. khubd clears halt conditions on the roothub during the initialization process, but the roothub isn't a real device, so the xHCI host controller doesn't need to know about the cleared halt. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:15 +00:00
/* Deal with stalled endpoints. The core should have sent the control message
* to clear the halt condition. However, we need to make the xHCI hardware
* reset its sequence number, since a device will expect a sequence number of
* zero after the halt condition is cleared.
* Context: in_interrupt
*/
void xhci_endpoint_reset(struct usb_hcd *hcd,
struct usb_host_endpoint *ep)
{
struct xhci_hcd *xhci;
struct usb_device *udev;
unsigned int ep_index;
unsigned long flags;
int ret;
USB: xhci: Endpoint representation refactoring. The xhci_ring structure contained information that is really related to an endpoint, not a ring. This will cause problems later when endpoint streams are supported and there are multiple rings per endpoint. Move the endpoint state and cancellation information into a new virtual endpoint structure, xhci_virt_ep. The list of TRBs to be cancelled should be per endpoint, not per ring, for easy access. There can be only one TRB that the endpoint stopped on after a stop endpoint command (even with streams enabled); move the stopped TRB information into the new virtual endpoint structure. Also move the 31 endpoint rings and temporary ring storage from the virtual device structure (xhci_virt_device) into the virtual endpoint structure (xhci_virt_ep). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:09 +00:00
struct xhci_virt_ep *virt_ep;
USB: xhci: Deal with stalled endpoints. When an endpoint on a device under an xHCI host controller stalls, the host controller driver must let the hardware know that the USB core has successfully cleared the halt condition. The HCD submits a Reset Endpoint Command, which will clear the toggle bit for USB 2.0 devices, and set the sequence number to zero for USB 3.0 devices. The xHCI urb_enqueue will accept new URBs while the endpoint is halted, and will queue them to the hardware rings. However, the endpoint doorbell will not be rung until the Reset Endpoint Command completes. Don't queue a reset endpoint command for root hubs. khubd clears halt conditions on the roothub during the initialization process, but the roothub isn't a real device, so the xHCI host controller doesn't need to know about the cleared halt. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:15 +00:00
xhci = hcd_to_xhci(hcd);
udev = (struct usb_device *) ep->hcpriv;
/* Called with a root hub endpoint (or an endpoint that wasn't added
* with xhci_add_endpoint()
*/
if (!ep->hcpriv)
return;
ep_index = xhci_get_endpoint_index(&ep->desc);
USB: xhci: Endpoint representation refactoring. The xhci_ring structure contained information that is really related to an endpoint, not a ring. This will cause problems later when endpoint streams are supported and there are multiple rings per endpoint. Move the endpoint state and cancellation information into a new virtual endpoint structure, xhci_virt_ep. The list of TRBs to be cancelled should be per endpoint, not per ring, for easy access. There can be only one TRB that the endpoint stopped on after a stop endpoint command (even with streams enabled); move the stopped TRB information into the new virtual endpoint structure. Also move the 31 endpoint rings and temporary ring storage from the virtual device structure (xhci_virt_device) into the virtual endpoint structure (xhci_virt_ep). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:09 +00:00
virt_ep = &xhci->devs[udev->slot_id]->eps[ep_index];
if (!virt_ep->stopped_td) {
USB: xhci: Stall handling bug fixes. Correct the xHCI code to handle stalls on USB endpoints. We need to move the endpoint ring's dequeue pointer past the stalled transfer, or the HW will try to restart the transfer the next time the doorbell is rung. Don't attempt to clear a halt on an endpoint if we haven't seen a stalled transfer for it. The USB core will attempt to clear a halt on all endpoints when it selects a new configuration. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:21 +00:00
xhci_dbg(xhci, "Endpoint 0x%x not halted, refusing to reset.\n",
ep->desc.bEndpointAddress);
return;
}
USB: xhci: Handle stalled control endpoints. When a control endpoint stalls, the next control transfer will clear the stall. The USB core doesn't call down to the host controller driver's endpoint_reset() method when control endpoints stall, so the xHCI driver has to do all its stall handling for internal state in its interrupt handler. When the host stalls on a control endpoint, it may stop on the data phase or status phase of the control transfer. Like other stalled endpoints, the xHCI driver needs to queue a Reset Endpoint command and move the hardware's control endpoint ring dequeue pointer past the failed control transfer (with a Set TR Dequeue Pointer or a Configure Endpoint command). Since the USB core doesn't call usb_hcd_reset_endpoint() for control endpoints, we need to do this in interrupt context when we get notified of the stalled transfer. URBs may be queued to the hardware before these two commands complete. The endpoint queue will be restarted once both commands complete. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-08-07 21:04:52 +00:00
if (usb_endpoint_xfer_control(&ep->desc)) {
xhci_dbg(xhci, "Control endpoint stall already handled.\n");
return;
}
USB: xhci: Deal with stalled endpoints. When an endpoint on a device under an xHCI host controller stalls, the host controller driver must let the hardware know that the USB core has successfully cleared the halt condition. The HCD submits a Reset Endpoint Command, which will clear the toggle bit for USB 2.0 devices, and set the sequence number to zero for USB 3.0 devices. The xHCI urb_enqueue will accept new URBs while the endpoint is halted, and will queue them to the hardware rings. However, the endpoint doorbell will not be rung until the Reset Endpoint Command completes. Don't queue a reset endpoint command for root hubs. khubd clears halt conditions on the roothub during the initialization process, but the roothub isn't a real device, so the xHCI host controller doesn't need to know about the cleared halt. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:15 +00:00
xhci_dbg(xhci, "Queueing reset endpoint command\n");
spin_lock_irqsave(&xhci->lock, flags);
ret = xhci_queue_reset_ep(xhci, udev->slot_id, ep_index);
USB: xhci: Stall handling bug fixes. Correct the xHCI code to handle stalls on USB endpoints. We need to move the endpoint ring's dequeue pointer past the stalled transfer, or the HW will try to restart the transfer the next time the doorbell is rung. Don't attempt to clear a halt on an endpoint if we haven't seen a stalled transfer for it. The USB core will attempt to clear a halt on all endpoints when it selects a new configuration. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:21 +00:00
/*
* Can't change the ring dequeue pointer until it's transitioned to the
* stopped state, which is only upon a successful reset endpoint
* command. Better hope that last command worked!
*/
USB: xhci: Deal with stalled endpoints. When an endpoint on a device under an xHCI host controller stalls, the host controller driver must let the hardware know that the USB core has successfully cleared the halt condition. The HCD submits a Reset Endpoint Command, which will clear the toggle bit for USB 2.0 devices, and set the sequence number to zero for USB 3.0 devices. The xHCI urb_enqueue will accept new URBs while the endpoint is halted, and will queue them to the hardware rings. However, the endpoint doorbell will not be rung until the Reset Endpoint Command completes. Don't queue a reset endpoint command for root hubs. khubd clears halt conditions on the roothub during the initialization process, but the roothub isn't a real device, so the xHCI host controller doesn't need to know about the cleared halt. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:15 +00:00
if (!ret) {
USB: xhci: Endpoint representation refactoring. The xhci_ring structure contained information that is really related to an endpoint, not a ring. This will cause problems later when endpoint streams are supported and there are multiple rings per endpoint. Move the endpoint state and cancellation information into a new virtual endpoint structure, xhci_virt_ep. The list of TRBs to be cancelled should be per endpoint, not per ring, for easy access. There can be only one TRB that the endpoint stopped on after a stop endpoint command (even with streams enabled); move the stopped TRB information into the new virtual endpoint structure. Also move the 31 endpoint rings and temporary ring storage from the virtual device structure (xhci_virt_device) into the virtual endpoint structure (xhci_virt_ep). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:09 +00:00
xhci_cleanup_stalled_ring(xhci, udev, ep_index);
kfree(virt_ep->stopped_td);
USB: xhci: Deal with stalled endpoints. When an endpoint on a device under an xHCI host controller stalls, the host controller driver must let the hardware know that the USB core has successfully cleared the halt condition. The HCD submits a Reset Endpoint Command, which will clear the toggle bit for USB 2.0 devices, and set the sequence number to zero for USB 3.0 devices. The xHCI urb_enqueue will accept new URBs while the endpoint is halted, and will queue them to the hardware rings. However, the endpoint doorbell will not be rung until the Reset Endpoint Command completes. Don't queue a reset endpoint command for root hubs. khubd clears halt conditions on the roothub during the initialization process, but the roothub isn't a real device, so the xHCI host controller doesn't need to know about the cleared halt. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:15 +00:00
xhci_ring_cmd_db(xhci);
}
USB: xhci: Fix issue with set interface after stall. When the USB core installs a new interface, it unconditionally clears the halts on all the endpoints on the new interface. Usually the xHCI host needs to know when an endpoint is reset, so it can change its internal endpoint state. In this case, it doesn't care, because the endpoints were never halted in the first place. To avoid issuing a redundant Reset Endpoint command, the xHCI driver looks at xhci_virt_ep->stopped_td to determine if the endpoint was actually halted. However, the functions that handle the stall never set that variable to NULL after it dealt with the stall. So if an endpoint stalled and a Reset Endpoint command completed, and then the class driver tried to install a new alternate setting, the xHCI driver would access the old xhci_virt_ep->stopped_td pointer. A similar problem occurs if the endpoint has been stopped to cancel a transfer. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-06 20:40:08 +00:00
virt_ep->stopped_td = NULL;
virt_ep->stopped_trb = NULL;
USB: xhci: Set stream ID to 0 after cleaning up stalls. After using state stored in xhci_virt_ep to clean up a stalled endpoint, be sure to set the stalled stream ID back to 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-06 20:40:18 +00:00
virt_ep->stopped_stream = 0;
USB: xhci: Deal with stalled endpoints. When an endpoint on a device under an xHCI host controller stalls, the host controller driver must let the hardware know that the USB core has successfully cleared the halt condition. The HCD submits a Reset Endpoint Command, which will clear the toggle bit for USB 2.0 devices, and set the sequence number to zero for USB 3.0 devices. The xHCI urb_enqueue will accept new URBs while the endpoint is halted, and will queue them to the hardware rings. However, the endpoint doorbell will not be rung until the Reset Endpoint Command completes. Don't queue a reset endpoint command for root hubs. khubd clears halt conditions on the roothub during the initialization process, but the roothub isn't a real device, so the xHCI host controller doesn't need to know about the cleared halt. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:15 +00:00
spin_unlock_irqrestore(&xhci->lock, flags);
if (ret)
xhci_warn(xhci, "FIXME allocate a new ring segment\n");
}
USB: xhci: Add memory allocation for USB3 bulk streams. Add support for allocating streams for USB 3.0 bulk endpoints. See Documentation/usb/bulk-streams.txt for more information about how and why you would use streams. When an endpoint has streams enabled, instead of having one ring where all transfers are enqueued to the hardware, it has several rings. The ring dequeue pointer in the endpoint context is changed to point to a "Stream Context Array". This is basically an array of pointers to transfer rings, one for each stream ID that the driver wants to use. The Stream Context Array size must be a power of two, and host controllers can place a limit on the size of the array (4 to 2^16 entries). These two facts make calculating the size of the Stream Context Array and the number of entries actually used by the driver a bit tricky. Besides the Stream Context Array and rings for all the stream IDs, we need one more data structure. The xHCI hardware will not tell us which stream ID a transfer event was for, but it will give us the slot ID, endpoint index, and physical address for the TRB that caused the event. For every endpoint on a device, add a radix tree to map physical TRB addresses to virtual segments within a stream ring. Keep track of whether an endpoint is transitioning to using streams, and don't enqueue any URBs while that's taking place. Refuse to transition an endpoint to streams if there are already URBs enqueued for that endpoint. We need to make sure that freeing streams does not fail, since a driver's disconnect() function may attempt to do this, and it cannot fail. Pre-allocate the command structure used to issue the Configure Endpoint command, and reserve space on the command ring for each stream endpoint. This may be a bit overkill, but it is permissible for the driver to allocate all streams in one call and free them in multiple calls. (It is not advised, however, since it is a waste of resources and time.) Even with the memory and ring room pre-allocated, freeing streams can still fail because the xHC rejects the configure endpoint command. It is valid (by the xHCI 0.96 spec) to return a "Bandwidth Error" or a "Resource Error" for a configure endpoint command. We should never see a Bandwidth Error, since bulk endpoints do not effect the reserved bandwidth. The host controller can still return a Resource Error, but it's improbable since the xHC would be going from a more resource-intensive configuration (streams) to a less resource-intensive configuration (no streams). If the xHC returns a Resource Error, the endpoint will be stuck with streams and will be unusable for drivers. It's an unavoidable consequence of broken host controller hardware. Includes bug fixes from the original patch, contributed by John Youn <John.Youn@synopsys.com> and Andy Green <AGreen@PLXTech.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-02 22:34:16 +00:00
static int xhci_check_streams_endpoint(struct xhci_hcd *xhci,
struct usb_device *udev, struct usb_host_endpoint *ep,
unsigned int slot_id)
{
int ret;
unsigned int ep_index;
unsigned int ep_state;
if (!ep)
return -EINVAL;
USB: xHCI: Add pointer to udev in struct xhci_virt_device Add a pointer to udev in struct xhci_virt_device. When allocate a new virt_device, make the pointer point to the corresponding udev. Modify xhci_check_args(), check if virt_dev->udev matches the target udev, to make sure command is issued to the right device. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:45 +00:00
ret = xhci_check_args(xhci_to_hcd(xhci), udev, ep, 1, true, __func__);
USB: xhci: Add memory allocation for USB3 bulk streams. Add support for allocating streams for USB 3.0 bulk endpoints. See Documentation/usb/bulk-streams.txt for more information about how and why you would use streams. When an endpoint has streams enabled, instead of having one ring where all transfers are enqueued to the hardware, it has several rings. The ring dequeue pointer in the endpoint context is changed to point to a "Stream Context Array". This is basically an array of pointers to transfer rings, one for each stream ID that the driver wants to use. The Stream Context Array size must be a power of two, and host controllers can place a limit on the size of the array (4 to 2^16 entries). These two facts make calculating the size of the Stream Context Array and the number of entries actually used by the driver a bit tricky. Besides the Stream Context Array and rings for all the stream IDs, we need one more data structure. The xHCI hardware will not tell us which stream ID a transfer event was for, but it will give us the slot ID, endpoint index, and physical address for the TRB that caused the event. For every endpoint on a device, add a radix tree to map physical TRB addresses to virtual segments within a stream ring. Keep track of whether an endpoint is transitioning to using streams, and don't enqueue any URBs while that's taking place. Refuse to transition an endpoint to streams if there are already URBs enqueued for that endpoint. We need to make sure that freeing streams does not fail, since a driver's disconnect() function may attempt to do this, and it cannot fail. Pre-allocate the command structure used to issue the Configure Endpoint command, and reserve space on the command ring for each stream endpoint. This may be a bit overkill, but it is permissible for the driver to allocate all streams in one call and free them in multiple calls. (It is not advised, however, since it is a waste of resources and time.) Even with the memory and ring room pre-allocated, freeing streams can still fail because the xHC rejects the configure endpoint command. It is valid (by the xHCI 0.96 spec) to return a "Bandwidth Error" or a "Resource Error" for a configure endpoint command. We should never see a Bandwidth Error, since bulk endpoints do not effect the reserved bandwidth. The host controller can still return a Resource Error, but it's improbable since the xHC would be going from a more resource-intensive configuration (streams) to a less resource-intensive configuration (no streams). If the xHC returns a Resource Error, the endpoint will be stuck with streams and will be unusable for drivers. It's an unavoidable consequence of broken host controller hardware. Includes bug fixes from the original patch, contributed by John Youn <John.Youn@synopsys.com> and Andy Green <AGreen@PLXTech.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-02 22:34:16 +00:00
if (ret <= 0)
return -EINVAL;
USB: remove the usb_host_ss_ep_comp structure This patch (as1375) eliminates the usb_host_ss_ep_comp structure used for storing a dynamically-allocated copy of the SuperSpeed endpoint companion descriptor. The SuperSpeed descriptor is placed directly in the usb_host_endpoint structure, alongside the standard endpoint descriptor. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-30 16:44:46 +00:00
if (ep->ss_ep_comp.bmAttributes == 0) {
USB: xhci: Add memory allocation for USB3 bulk streams. Add support for allocating streams for USB 3.0 bulk endpoints. See Documentation/usb/bulk-streams.txt for more information about how and why you would use streams. When an endpoint has streams enabled, instead of having one ring where all transfers are enqueued to the hardware, it has several rings. The ring dequeue pointer in the endpoint context is changed to point to a "Stream Context Array". This is basically an array of pointers to transfer rings, one for each stream ID that the driver wants to use. The Stream Context Array size must be a power of two, and host controllers can place a limit on the size of the array (4 to 2^16 entries). These two facts make calculating the size of the Stream Context Array and the number of entries actually used by the driver a bit tricky. Besides the Stream Context Array and rings for all the stream IDs, we need one more data structure. The xHCI hardware will not tell us which stream ID a transfer event was for, but it will give us the slot ID, endpoint index, and physical address for the TRB that caused the event. For every endpoint on a device, add a radix tree to map physical TRB addresses to virtual segments within a stream ring. Keep track of whether an endpoint is transitioning to using streams, and don't enqueue any URBs while that's taking place. Refuse to transition an endpoint to streams if there are already URBs enqueued for that endpoint. We need to make sure that freeing streams does not fail, since a driver's disconnect() function may attempt to do this, and it cannot fail. Pre-allocate the command structure used to issue the Configure Endpoint command, and reserve space on the command ring for each stream endpoint. This may be a bit overkill, but it is permissible for the driver to allocate all streams in one call and free them in multiple calls. (It is not advised, however, since it is a waste of resources and time.) Even with the memory and ring room pre-allocated, freeing streams can still fail because the xHC rejects the configure endpoint command. It is valid (by the xHCI 0.96 spec) to return a "Bandwidth Error" or a "Resource Error" for a configure endpoint command. We should never see a Bandwidth Error, since bulk endpoints do not effect the reserved bandwidth. The host controller can still return a Resource Error, but it's improbable since the xHC would be going from a more resource-intensive configuration (streams) to a less resource-intensive configuration (no streams). If the xHC returns a Resource Error, the endpoint will be stuck with streams and will be unusable for drivers. It's an unavoidable consequence of broken host controller hardware. Includes bug fixes from the original patch, contributed by John Youn <John.Youn@synopsys.com> and Andy Green <AGreen@PLXTech.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-02 22:34:16 +00:00
xhci_warn(xhci, "WARN: SuperSpeed Endpoint Companion"
" descriptor for ep 0x%x does not support streams\n",
ep->desc.bEndpointAddress);
return -EINVAL;
}
ep_index = xhci_get_endpoint_index(&ep->desc);
ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state;
if (ep_state & EP_HAS_STREAMS ||
ep_state & EP_GETTING_STREAMS) {
xhci_warn(xhci, "WARN: SuperSpeed bulk endpoint 0x%x "
"already has streams set up.\n",
ep->desc.bEndpointAddress);
xhci_warn(xhci, "Send email to xHCI maintainer and ask for "
"dynamic stream context array reallocation.\n");
return -EINVAL;
}
if (!list_empty(&xhci->devs[slot_id]->eps[ep_index].ring->td_list)) {
xhci_warn(xhci, "Cannot setup streams for SuperSpeed bulk "
"endpoint 0x%x; URBs are pending.\n",
ep->desc.bEndpointAddress);
return -EINVAL;
}
return 0;
}
static void xhci_calculate_streams_entries(struct xhci_hcd *xhci,
unsigned int *num_streams, unsigned int *num_stream_ctxs)
{
unsigned int max_streams;
/* The stream context array size must be a power of two */
*num_stream_ctxs = roundup_pow_of_two(*num_streams);
/*
* Find out how many primary stream array entries the host controller
* supports. Later we may use secondary stream arrays (similar to 2nd
* level page entries), but that's an optional feature for xHCI host
* controllers. xHCs must support at least 4 stream IDs.
*/
max_streams = HCC_MAX_PSA(xhci->hcc_params);
if (*num_stream_ctxs > max_streams) {
xhci_dbg(xhci, "xHCI HW only supports %u stream ctx entries.\n",
max_streams);
*num_stream_ctxs = max_streams;
*num_streams = max_streams;
}
}
/* Returns an error code if one of the endpoint already has streams.
* This does not change any data structures, it only checks and gathers
* information.
*/
static int xhci_calculate_streams_and_bitmask(struct xhci_hcd *xhci,
struct usb_device *udev,
struct usb_host_endpoint **eps, unsigned int num_eps,
unsigned int *num_streams, u32 *changed_ep_bitmask)
{
unsigned int max_streams;
unsigned int endpoint_flag;
int i;
int ret;
for (i = 0; i < num_eps; i++) {
ret = xhci_check_streams_endpoint(xhci, udev,
eps[i], udev->slot_id);
if (ret < 0)
return ret;
USB: remove the usb_host_ss_ep_comp structure This patch (as1375) eliminates the usb_host_ss_ep_comp structure used for storing a dynamically-allocated copy of the SuperSpeed endpoint companion descriptor. The SuperSpeed descriptor is placed directly in the usb_host_endpoint structure, alongside the standard endpoint descriptor. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-30 16:44:46 +00:00
max_streams = USB_SS_MAX_STREAMS(
eps[i]->ss_ep_comp.bmAttributes);
USB: xhci: Add memory allocation for USB3 bulk streams. Add support for allocating streams for USB 3.0 bulk endpoints. See Documentation/usb/bulk-streams.txt for more information about how and why you would use streams. When an endpoint has streams enabled, instead of having one ring where all transfers are enqueued to the hardware, it has several rings. The ring dequeue pointer in the endpoint context is changed to point to a "Stream Context Array". This is basically an array of pointers to transfer rings, one for each stream ID that the driver wants to use. The Stream Context Array size must be a power of two, and host controllers can place a limit on the size of the array (4 to 2^16 entries). These two facts make calculating the size of the Stream Context Array and the number of entries actually used by the driver a bit tricky. Besides the Stream Context Array and rings for all the stream IDs, we need one more data structure. The xHCI hardware will not tell us which stream ID a transfer event was for, but it will give us the slot ID, endpoint index, and physical address for the TRB that caused the event. For every endpoint on a device, add a radix tree to map physical TRB addresses to virtual segments within a stream ring. Keep track of whether an endpoint is transitioning to using streams, and don't enqueue any URBs while that's taking place. Refuse to transition an endpoint to streams if there are already URBs enqueued for that endpoint. We need to make sure that freeing streams does not fail, since a driver's disconnect() function may attempt to do this, and it cannot fail. Pre-allocate the command structure used to issue the Configure Endpoint command, and reserve space on the command ring for each stream endpoint. This may be a bit overkill, but it is permissible for the driver to allocate all streams in one call and free them in multiple calls. (It is not advised, however, since it is a waste of resources and time.) Even with the memory and ring room pre-allocated, freeing streams can still fail because the xHC rejects the configure endpoint command. It is valid (by the xHCI 0.96 spec) to return a "Bandwidth Error" or a "Resource Error" for a configure endpoint command. We should never see a Bandwidth Error, since bulk endpoints do not effect the reserved bandwidth. The host controller can still return a Resource Error, but it's improbable since the xHC would be going from a more resource-intensive configuration (streams) to a less resource-intensive configuration (no streams). If the xHC returns a Resource Error, the endpoint will be stuck with streams and will be unusable for drivers. It's an unavoidable consequence of broken host controller hardware. Includes bug fixes from the original patch, contributed by John Youn <John.Youn@synopsys.com> and Andy Green <AGreen@PLXTech.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-02 22:34:16 +00:00
if (max_streams < (*num_streams - 1)) {
xhci_dbg(xhci, "Ep 0x%x only supports %u stream IDs.\n",
eps[i]->desc.bEndpointAddress,
max_streams);
*num_streams = max_streams+1;
}
endpoint_flag = xhci_get_endpoint_flag(&eps[i]->desc);
if (*changed_ep_bitmask & endpoint_flag)
return -EINVAL;
*changed_ep_bitmask |= endpoint_flag;
}
return 0;
}
static u32 xhci_calculate_no_streams_bitmask(struct xhci_hcd *xhci,
struct usb_device *udev,
struct usb_host_endpoint **eps, unsigned int num_eps)
{
u32 changed_ep_bitmask = 0;
unsigned int slot_id;
unsigned int ep_index;
unsigned int ep_state;
int i;
slot_id = udev->slot_id;
if (!xhci->devs[slot_id])
return 0;
for (i = 0; i < num_eps; i++) {
ep_index = xhci_get_endpoint_index(&eps[i]->desc);
ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state;
/* Are streams already being freed for the endpoint? */
if (ep_state & EP_GETTING_NO_STREAMS) {
xhci_warn(xhci, "WARN Can't disable streams for "
"endpoint 0x%x\n, "
"streams are being disabled already.",
eps[i]->desc.bEndpointAddress);
return 0;
}
/* Are there actually any streams to free? */
if (!(ep_state & EP_HAS_STREAMS) &&
!(ep_state & EP_GETTING_STREAMS)) {
xhci_warn(xhci, "WARN Can't disable streams for "
"endpoint 0x%x\n, "
"streams are already disabled!",
eps[i]->desc.bEndpointAddress);
xhci_warn(xhci, "WARN xhci_free_streams() called "
"with non-streams endpoint\n");
return 0;
}
changed_ep_bitmask |= xhci_get_endpoint_flag(&eps[i]->desc);
}
return changed_ep_bitmask;
}
/*
* The USB device drivers use this function (though the HCD interface in USB
* core) to prepare a set of bulk endpoints to use streams. Streams are used to
* coordinate mass storage command queueing across multiple endpoints (basically
* a stream ID == a task ID).
*
* Setting up streams involves allocating the same size stream context array
* for each endpoint and issuing a configure endpoint command for all endpoints.
*
* Don't allow the call to succeed if one endpoint only supports one stream
* (which means it doesn't support streams at all).
*
* Drivers may get less stream IDs than they asked for, if the host controller
* hardware or endpoints claim they can't support the number of requested
* stream IDs.
*/
int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
struct usb_host_endpoint **eps, unsigned int num_eps,
unsigned int num_streams, gfp_t mem_flags)
{
int i, ret;
struct xhci_hcd *xhci;
struct xhci_virt_device *vdev;
struct xhci_command *config_cmd;
unsigned int ep_index;
unsigned int num_stream_ctxs;
unsigned long flags;
u32 changed_ep_bitmask = 0;
if (!eps)
return -EINVAL;
/* Add one to the number of streams requested to account for
* stream 0 that is reserved for xHCI usage.
*/
num_streams += 1;
xhci = hcd_to_xhci(hcd);
xhci_dbg(xhci, "Driver wants %u stream IDs (including stream 0).\n",
num_streams);
config_cmd = xhci_alloc_command(xhci, true, true, mem_flags);
if (!config_cmd) {
xhci_dbg(xhci, "Could not allocate xHCI command structure.\n");
return -ENOMEM;
}
/* Check to make sure all endpoints are not already configured for
* streams. While we're at it, find the maximum number of streams that
* all the endpoints will support and check for duplicate endpoints.
*/
spin_lock_irqsave(&xhci->lock, flags);
ret = xhci_calculate_streams_and_bitmask(xhci, udev, eps,
num_eps, &num_streams, &changed_ep_bitmask);
if (ret < 0) {
xhci_free_command(xhci, config_cmd);
spin_unlock_irqrestore(&xhci->lock, flags);
return ret;
}
if (num_streams <= 1) {
xhci_warn(xhci, "WARN: endpoints can't handle "
"more than one stream.\n");
xhci_free_command(xhci, config_cmd);
spin_unlock_irqrestore(&xhci->lock, flags);
return -EINVAL;
}
vdev = xhci->devs[udev->slot_id];
/* Mark each endpoint as being in transistion, so
* xhci_urb_enqueue() will reject all URBs.
*/
for (i = 0; i < num_eps; i++) {
ep_index = xhci_get_endpoint_index(&eps[i]->desc);
vdev->eps[ep_index].ep_state |= EP_GETTING_STREAMS;
}
spin_unlock_irqrestore(&xhci->lock, flags);
/* Setup internal data structures and allocate HW data structures for
* streams (but don't install the HW structures in the input context
* until we're sure all memory allocation succeeded).
*/
xhci_calculate_streams_entries(xhci, &num_streams, &num_stream_ctxs);
xhci_dbg(xhci, "Need %u stream ctx entries for %u stream IDs.\n",
num_stream_ctxs, num_streams);
for (i = 0; i < num_eps; i++) {
ep_index = xhci_get_endpoint_index(&eps[i]->desc);
vdev->eps[ep_index].stream_info = xhci_alloc_stream_info(xhci,
num_stream_ctxs,
num_streams, mem_flags);
if (!vdev->eps[ep_index].stream_info)
goto cleanup;
/* Set maxPstreams in endpoint context and update deq ptr to
* point to stream context array. FIXME
*/
}
/* Set up the input context for a configure endpoint command. */
for (i = 0; i < num_eps; i++) {
struct xhci_ep_ctx *ep_ctx;
ep_index = xhci_get_endpoint_index(&eps[i]->desc);
ep_ctx = xhci_get_ep_ctx(xhci, config_cmd->in_ctx, ep_index);
xhci_endpoint_copy(xhci, config_cmd->in_ctx,
vdev->out_ctx, ep_index);
xhci_setup_streams_ep_input_ctx(xhci, ep_ctx,
vdev->eps[ep_index].stream_info);
}
/* Tell the HW to drop its old copy of the endpoint context info
* and add the updated copy from the input context.
*/
xhci_setup_input_ctx_for_config_ep(xhci, config_cmd->in_ctx,
vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask);
/* Issue and wait for the configure endpoint command */
ret = xhci_configure_endpoint(xhci, udev, config_cmd,
false, false);
/* xHC rejected the configure endpoint command for some reason, so we
* leave the old ring intact and free our internal streams data
* structure.
*/
if (ret < 0)
goto cleanup;
spin_lock_irqsave(&xhci->lock, flags);
for (i = 0; i < num_eps; i++) {
ep_index = xhci_get_endpoint_index(&eps[i]->desc);
vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS;
xhci_dbg(xhci, "Slot %u ep ctx %u now has streams.\n",
udev->slot_id, ep_index);
vdev->eps[ep_index].ep_state |= EP_HAS_STREAMS;
}
xhci_free_command(xhci, config_cmd);
spin_unlock_irqrestore(&xhci->lock, flags);
/* Subtract 1 for stream 0, which drivers can't use */
return num_streams - 1;
cleanup:
/* If it didn't work, free the streams! */
for (i = 0; i < num_eps; i++) {
ep_index = xhci_get_endpoint_index(&eps[i]->desc);
xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info);
USB: xhci: Avoid double free after streams are disabled. When a device is disconnected, xhci_free_virt_device() is called. Ramya found that if the device had streams enabled, and then the driver freed the streams with a call to usb_free_streams(), then about a minute after he had called this, his machine crashed with a Bad DMA error. It turns out that xhci_free_virt_device() would attempt to free the endpoint's stream_info data structure if it wasn't NULL, and the free streams function was not setting it to NULL after freeing it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Tested-by: Ramya Desai <ramya.desai@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-30 22:37:56 +00:00
vdev->eps[ep_index].stream_info = NULL;
USB: xhci: Add memory allocation for USB3 bulk streams. Add support for allocating streams for USB 3.0 bulk endpoints. See Documentation/usb/bulk-streams.txt for more information about how and why you would use streams. When an endpoint has streams enabled, instead of having one ring where all transfers are enqueued to the hardware, it has several rings. The ring dequeue pointer in the endpoint context is changed to point to a "Stream Context Array". This is basically an array of pointers to transfer rings, one for each stream ID that the driver wants to use. The Stream Context Array size must be a power of two, and host controllers can place a limit on the size of the array (4 to 2^16 entries). These two facts make calculating the size of the Stream Context Array and the number of entries actually used by the driver a bit tricky. Besides the Stream Context Array and rings for all the stream IDs, we need one more data structure. The xHCI hardware will not tell us which stream ID a transfer event was for, but it will give us the slot ID, endpoint index, and physical address for the TRB that caused the event. For every endpoint on a device, add a radix tree to map physical TRB addresses to virtual segments within a stream ring. Keep track of whether an endpoint is transitioning to using streams, and don't enqueue any URBs while that's taking place. Refuse to transition an endpoint to streams if there are already URBs enqueued for that endpoint. We need to make sure that freeing streams does not fail, since a driver's disconnect() function may attempt to do this, and it cannot fail. Pre-allocate the command structure used to issue the Configure Endpoint command, and reserve space on the command ring for each stream endpoint. This may be a bit overkill, but it is permissible for the driver to allocate all streams in one call and free them in multiple calls. (It is not advised, however, since it is a waste of resources and time.) Even with the memory and ring room pre-allocated, freeing streams can still fail because the xHC rejects the configure endpoint command. It is valid (by the xHCI 0.96 spec) to return a "Bandwidth Error" or a "Resource Error" for a configure endpoint command. We should never see a Bandwidth Error, since bulk endpoints do not effect the reserved bandwidth. The host controller can still return a Resource Error, but it's improbable since the xHC would be going from a more resource-intensive configuration (streams) to a less resource-intensive configuration (no streams). If the xHC returns a Resource Error, the endpoint will be stuck with streams and will be unusable for drivers. It's an unavoidable consequence of broken host controller hardware. Includes bug fixes from the original patch, contributed by John Youn <John.Youn@synopsys.com> and Andy Green <AGreen@PLXTech.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-02 22:34:16 +00:00
/* FIXME Unset maxPstreams in endpoint context and
* update deq ptr to point to normal string ring.
*/
vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS;
vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS;
xhci_endpoint_zero(xhci, vdev, eps[i]);
}
xhci_free_command(xhci, config_cmd);
return -ENOMEM;
}
/* Transition the endpoint from using streams to being a "normal" endpoint
* without streams.
*
* Modify the endpoint context state, submit a configure endpoint command,
* and free all endpoint rings for streams if that completes successfully.
*/
int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
struct usb_host_endpoint **eps, unsigned int num_eps,
gfp_t mem_flags)
{
int i, ret;
struct xhci_hcd *xhci;
struct xhci_virt_device *vdev;
struct xhci_command *command;
unsigned int ep_index;
unsigned long flags;
u32 changed_ep_bitmask;
xhci = hcd_to_xhci(hcd);
vdev = xhci->devs[udev->slot_id];
/* Set up a configure endpoint command to remove the streams rings */
spin_lock_irqsave(&xhci->lock, flags);
changed_ep_bitmask = xhci_calculate_no_streams_bitmask(xhci,
udev, eps, num_eps);
if (changed_ep_bitmask == 0) {
spin_unlock_irqrestore(&xhci->lock, flags);
return -EINVAL;
}
/* Use the xhci_command structure from the first endpoint. We may have
* allocated too many, but the driver may call xhci_free_streams() for
* each endpoint it grouped into one call to xhci_alloc_streams().
*/
ep_index = xhci_get_endpoint_index(&eps[0]->desc);
command = vdev->eps[ep_index].stream_info->free_streams_command;
for (i = 0; i < num_eps; i++) {
struct xhci_ep_ctx *ep_ctx;
ep_index = xhci_get_endpoint_index(&eps[i]->desc);
ep_ctx = xhci_get_ep_ctx(xhci, command->in_ctx, ep_index);
xhci->devs[udev->slot_id]->eps[ep_index].ep_state |=
EP_GETTING_NO_STREAMS;
xhci_endpoint_copy(xhci, command->in_ctx,
vdev->out_ctx, ep_index);
xhci_setup_no_streams_ep_input_ctx(xhci, ep_ctx,
&vdev->eps[ep_index]);
}
xhci_setup_input_ctx_for_config_ep(xhci, command->in_ctx,
vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask);
spin_unlock_irqrestore(&xhci->lock, flags);
/* Issue and wait for the configure endpoint command,
* which must succeed.
*/
ret = xhci_configure_endpoint(xhci, udev, command,
false, true);
/* xHC rejected the configure endpoint command for some reason, so we
* leave the streams rings intact.
*/
if (ret < 0)
return ret;
spin_lock_irqsave(&xhci->lock, flags);
for (i = 0; i < num_eps; i++) {
ep_index = xhci_get_endpoint_index(&eps[i]->desc);
xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info);
USB: xhci: Avoid double free after streams are disabled. When a device is disconnected, xhci_free_virt_device() is called. Ramya found that if the device had streams enabled, and then the driver freed the streams with a call to usb_free_streams(), then about a minute after he had called this, his machine crashed with a Bad DMA error. It turns out that xhci_free_virt_device() would attempt to free the endpoint's stream_info data structure if it wasn't NULL, and the free streams function was not setting it to NULL after freeing it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Tested-by: Ramya Desai <ramya.desai@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-30 22:37:56 +00:00
vdev->eps[ep_index].stream_info = NULL;
USB: xhci: Add memory allocation for USB3 bulk streams. Add support for allocating streams for USB 3.0 bulk endpoints. See Documentation/usb/bulk-streams.txt for more information about how and why you would use streams. When an endpoint has streams enabled, instead of having one ring where all transfers are enqueued to the hardware, it has several rings. The ring dequeue pointer in the endpoint context is changed to point to a "Stream Context Array". This is basically an array of pointers to transfer rings, one for each stream ID that the driver wants to use. The Stream Context Array size must be a power of two, and host controllers can place a limit on the size of the array (4 to 2^16 entries). These two facts make calculating the size of the Stream Context Array and the number of entries actually used by the driver a bit tricky. Besides the Stream Context Array and rings for all the stream IDs, we need one more data structure. The xHCI hardware will not tell us which stream ID a transfer event was for, but it will give us the slot ID, endpoint index, and physical address for the TRB that caused the event. For every endpoint on a device, add a radix tree to map physical TRB addresses to virtual segments within a stream ring. Keep track of whether an endpoint is transitioning to using streams, and don't enqueue any URBs while that's taking place. Refuse to transition an endpoint to streams if there are already URBs enqueued for that endpoint. We need to make sure that freeing streams does not fail, since a driver's disconnect() function may attempt to do this, and it cannot fail. Pre-allocate the command structure used to issue the Configure Endpoint command, and reserve space on the command ring for each stream endpoint. This may be a bit overkill, but it is permissible for the driver to allocate all streams in one call and free them in multiple calls. (It is not advised, however, since it is a waste of resources and time.) Even with the memory and ring room pre-allocated, freeing streams can still fail because the xHC rejects the configure endpoint command. It is valid (by the xHCI 0.96 spec) to return a "Bandwidth Error" or a "Resource Error" for a configure endpoint command. We should never see a Bandwidth Error, since bulk endpoints do not effect the reserved bandwidth. The host controller can still return a Resource Error, but it's improbable since the xHC would be going from a more resource-intensive configuration (streams) to a less resource-intensive configuration (no streams). If the xHC returns a Resource Error, the endpoint will be stuck with streams and will be unusable for drivers. It's an unavoidable consequence of broken host controller hardware. Includes bug fixes from the original patch, contributed by John Youn <John.Youn@synopsys.com> and Andy Green <AGreen@PLXTech.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-04-02 22:34:16 +00:00
/* FIXME Unset maxPstreams in endpoint context and
* update deq ptr to point to normal string ring.
*/
vdev->eps[ep_index].ep_state &= ~EP_GETTING_NO_STREAMS;
vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS;
}
spin_unlock_irqrestore(&xhci->lock, flags);
return 0;
}
USB: xhci: Notify the xHC when a device is reset. When a USB device is reset, the xHCI hardware must know, in order to match the device state and disable all endpoints except control endpoint 0. Issue a Reset Device command after a USB device is successfully reset. Wait on the command to finish, and then cache or free the disabled endpoint rings. There are four different USB device states that the xHCI hardware tracks: - disabled/enabled - device connection has just been detected, - default - the device has been reset and has an address of 0, - addressed - the device has a non-zero address but no configuration has been set, - configured - a set configuration succeeded. The USB core may issue a port reset when a device is in any state, but the Reset Device command will fail for a 0.96 xHC if the device is not in the addressed or configured state. Don't consider this failure as an error, but don't free any endpoint rings if this command fails. A storage driver may request that the USB device be reset during error handling, so use GPF_NOIO instead of GPF_KERNEL while allocating memory for the Reset Device command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-09 23:59:13 +00:00
/*
* This submits a Reset Device Command, which will set the device state to 0,
* set the device address to 0, and disable all the endpoints except the default
* control endpoint. The USB core should come back and call
* xhci_address_device(), and then re-set up the configuration. If this is
* called because of a usb_reset_and_verify_device(), then the old alternate
* settings will be re-installed through the normal bandwidth allocation
* functions.
*
* Wait for the Reset Device command to finish. Remove all structures
* associated with the endpoints that were disabled. Clear the input device
* structure? Cache the rings? Reset the control endpoint 0 max packet size?
USB: xHCI: change xhci_reset_device() to allocate new device Rename xhci_reset_device() to xhci_discover_or_reset_device(). If xhci_discover_or_reset_device() is called to reset a device which does not exist or does not match the udev, it calls xhci_alloc_dev() to re-allocate the device. This would prevent the reset device failure, possibly due to the xHC restore error during S3/S4 resume. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:48 +00:00
*
* If the virt_dev to be reset does not exist or does not match the udev,
* it means the device is lost, possibly due to the xHC restore error and
* re-initialization during S3/S4. In this case, call xhci_alloc_dev() to
* re-allocate the device.
USB: xhci: Notify the xHC when a device is reset. When a USB device is reset, the xHCI hardware must know, in order to match the device state and disable all endpoints except control endpoint 0. Issue a Reset Device command after a USB device is successfully reset. Wait on the command to finish, and then cache or free the disabled endpoint rings. There are four different USB device states that the xHCI hardware tracks: - disabled/enabled - device connection has just been detected, - default - the device has been reset and has an address of 0, - addressed - the device has a non-zero address but no configuration has been set, - configured - a set configuration succeeded. The USB core may issue a port reset when a device is in any state, but the Reset Device command will fail for a 0.96 xHC if the device is not in the addressed or configured state. Don't consider this failure as an error, but don't free any endpoint rings if this command fails. A storage driver may request that the USB device be reset during error handling, so use GPF_NOIO instead of GPF_KERNEL while allocating memory for the Reset Device command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-09 23:59:13 +00:00
*/
USB: xHCI: change xhci_reset_device() to allocate new device Rename xhci_reset_device() to xhci_discover_or_reset_device(). If xhci_discover_or_reset_device() is called to reset a device which does not exist or does not match the udev, it calls xhci_alloc_dev() to re-allocate the device. This would prevent the reset device failure, possibly due to the xHC restore error during S3/S4 resume. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:48 +00:00
int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev)
USB: xhci: Notify the xHC when a device is reset. When a USB device is reset, the xHCI hardware must know, in order to match the device state and disable all endpoints except control endpoint 0. Issue a Reset Device command after a USB device is successfully reset. Wait on the command to finish, and then cache or free the disabled endpoint rings. There are four different USB device states that the xHCI hardware tracks: - disabled/enabled - device connection has just been detected, - default - the device has been reset and has an address of 0, - addressed - the device has a non-zero address but no configuration has been set, - configured - a set configuration succeeded. The USB core may issue a port reset when a device is in any state, but the Reset Device command will fail for a 0.96 xHC if the device is not in the addressed or configured state. Don't consider this failure as an error, but don't free any endpoint rings if this command fails. A storage driver may request that the USB device be reset during error handling, so use GPF_NOIO instead of GPF_KERNEL while allocating memory for the Reset Device command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-09 23:59:13 +00:00
{
int ret, i;
unsigned long flags;
struct xhci_hcd *xhci;
unsigned int slot_id;
struct xhci_virt_device *virt_dev;
struct xhci_command *reset_device_cmd;
int timeleft;
int last_freed_endpoint;
USB: xHCI: change xhci_reset_device() to allocate new device Rename xhci_reset_device() to xhci_discover_or_reset_device(). If xhci_discover_or_reset_device() is called to reset a device which does not exist or does not match the udev, it calls xhci_alloc_dev() to re-allocate the device. This would prevent the reset device failure, possibly due to the xHC restore error during S3/S4 resume. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:48 +00:00
ret = xhci_check_args(hcd, udev, NULL, 0, false, __func__);
USB: xhci: Notify the xHC when a device is reset. When a USB device is reset, the xHCI hardware must know, in order to match the device state and disable all endpoints except control endpoint 0. Issue a Reset Device command after a USB device is successfully reset. Wait on the command to finish, and then cache or free the disabled endpoint rings. There are four different USB device states that the xHCI hardware tracks: - disabled/enabled - device connection has just been detected, - default - the device has been reset and has an address of 0, - addressed - the device has a non-zero address but no configuration has been set, - configured - a set configuration succeeded. The USB core may issue a port reset when a device is in any state, but the Reset Device command will fail for a 0.96 xHC if the device is not in the addressed or configured state. Don't consider this failure as an error, but don't free any endpoint rings if this command fails. A storage driver may request that the USB device be reset during error handling, so use GPF_NOIO instead of GPF_KERNEL while allocating memory for the Reset Device command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-09 23:59:13 +00:00
if (ret <= 0)
return ret;
xhci = hcd_to_xhci(hcd);
slot_id = udev->slot_id;
virt_dev = xhci->devs[slot_id];
USB: xHCI: change xhci_reset_device() to allocate new device Rename xhci_reset_device() to xhci_discover_or_reset_device(). If xhci_discover_or_reset_device() is called to reset a device which does not exist or does not match the udev, it calls xhci_alloc_dev() to re-allocate the device. This would prevent the reset device failure, possibly due to the xHC restore error during S3/S4 resume. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:48 +00:00
if (!virt_dev) {
xhci_dbg(xhci, "The device to be reset with slot ID %u does "
"not exist. Re-allocate the device\n", slot_id);
ret = xhci_alloc_dev(hcd, udev);
if (ret == 1)
return 0;
else
return -EINVAL;
}
if (virt_dev->udev != udev) {
/* If the virt_dev and the udev does not match, this virt_dev
* may belong to another udev.
* Re-allocate the device.
*/
xhci_dbg(xhci, "The device to be reset with slot ID %u does "
"not match the udev. Re-allocate the device\n",
slot_id);
ret = xhci_alloc_dev(hcd, udev);
if (ret == 1)
return 0;
else
return -EINVAL;
}
USB: xhci: Notify the xHC when a device is reset. When a USB device is reset, the xHCI hardware must know, in order to match the device state and disable all endpoints except control endpoint 0. Issue a Reset Device command after a USB device is successfully reset. Wait on the command to finish, and then cache or free the disabled endpoint rings. There are four different USB device states that the xHCI hardware tracks: - disabled/enabled - device connection has just been detected, - default - the device has been reset and has an address of 0, - addressed - the device has a non-zero address but no configuration has been set, - configured - a set configuration succeeded. The USB core may issue a port reset when a device is in any state, but the Reset Device command will fail for a 0.96 xHC if the device is not in the addressed or configured state. Don't consider this failure as an error, but don't free any endpoint rings if this command fails. A storage driver may request that the USB device be reset during error handling, so use GPF_NOIO instead of GPF_KERNEL while allocating memory for the Reset Device command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-09 23:59:13 +00:00
xhci_dbg(xhci, "Resetting device with slot ID %u\n", slot_id);
/* Allocate the command structure that holds the struct completion.
* Assume we're in process context, since the normal device reset
* process has to wait for the device anyway. Storage devices are
* reset as part of error handling, so use GFP_NOIO instead of
* GFP_KERNEL.
*/
reset_device_cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO);
if (!reset_device_cmd) {
xhci_dbg(xhci, "Couldn't allocate command structure.\n");
return -ENOMEM;
}
/* Attempt to submit the Reset Device command to the command ring */
spin_lock_irqsave(&xhci->lock, flags);
reset_device_cmd->command_trb = xhci->cmd_ring->enqueue;
xhci: Fix reset-device and configure-endpoint commands We have been having problems with the USB-IF Gold Tree tests when plugging and unplugging devices from the tree. I have seen that the reset-device and configure-endpoint commands, which are invoked from xhci_discover_or_reset_device() and xhci_configure_endpoint(), will sometimes time out. After much debugging, I determined that the commands themselves do not actually time out, but rather their completion events do not get delivered to the right place. This happens when the command ring has just wrapped around, and it's enqueue pointer is left pointing to the link TRB. xhci_discover_or_reset_device() and xhci_configure_endpoint() use the enqueue pointer directly as their command TRB pointer, without checking whether it's pointing to the link TRB. When the completion event arrives, if the command TRB is pointing to the link TRB, the check against the command ring dequeue pointer in handle_cmd_in_cmd_wait_list() fails, so the completion inside the command does not get signaled. The patch below fixes the timeout problem for me. This should be queued for the 2.6.35 and 2.6.36 stable trees. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org
2010-11-18 00:26:50 +00:00
/* Enqueue pointer can be left pointing to the link TRB,
* we must handle that
*/
if ((reset_device_cmd->command_trb->link.control & TRB_TYPE_BITMASK)
== TRB_TYPE(TRB_LINK))
reset_device_cmd->command_trb =
xhci->cmd_ring->enq_seg->next->trbs;
USB: xhci: Notify the xHC when a device is reset. When a USB device is reset, the xHCI hardware must know, in order to match the device state and disable all endpoints except control endpoint 0. Issue a Reset Device command after a USB device is successfully reset. Wait on the command to finish, and then cache or free the disabled endpoint rings. There are four different USB device states that the xHCI hardware tracks: - disabled/enabled - device connection has just been detected, - default - the device has been reset and has an address of 0, - addressed - the device has a non-zero address but no configuration has been set, - configured - a set configuration succeeded. The USB core may issue a port reset when a device is in any state, but the Reset Device command will fail for a 0.96 xHC if the device is not in the addressed or configured state. Don't consider this failure as an error, but don't free any endpoint rings if this command fails. A storage driver may request that the USB device be reset during error handling, so use GPF_NOIO instead of GPF_KERNEL while allocating memory for the Reset Device command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-09 23:59:13 +00:00
list_add_tail(&reset_device_cmd->cmd_list, &virt_dev->cmd_list);
ret = xhci_queue_reset_device(xhci, slot_id);
if (ret) {
xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");
list_del(&reset_device_cmd->cmd_list);
spin_unlock_irqrestore(&xhci->lock, flags);
goto command_cleanup;
}
xhci_ring_cmd_db(xhci);
spin_unlock_irqrestore(&xhci->lock, flags);
/* Wait for the Reset Device command to finish */
timeleft = wait_for_completion_interruptible_timeout(
reset_device_cmd->completion,
USB_CTRL_SET_TIMEOUT);
if (timeleft <= 0) {
xhci_warn(xhci, "%s while waiting for reset device command\n",
timeleft == 0 ? "Timeout" : "Signal");
spin_lock_irqsave(&xhci->lock, flags);
/* The timeout might have raced with the event ring handler, so
* only delete from the list if the item isn't poisoned.
*/
if (reset_device_cmd->cmd_list.next != LIST_POISON1)
list_del(&reset_device_cmd->cmd_list);
spin_unlock_irqrestore(&xhci->lock, flags);
ret = -ETIME;
goto command_cleanup;
}
/* The Reset Device command can't fail, according to the 0.95/0.96 spec,
* unless we tried to reset a slot ID that wasn't enabled,
* or the device wasn't in the addressed or configured state.
*/
ret = reset_device_cmd->status;
switch (ret) {
case COMP_EBADSLT: /* 0.95 completion code for bad slot ID */
case COMP_CTX_STATE: /* 0.96 completion code for same thing */
xhci_info(xhci, "Can't reset device (slot ID %u) in %s state\n",
slot_id,
xhci_get_slot_state(xhci, virt_dev->out_ctx));
xhci_info(xhci, "Not freeing device rings.\n");
/* Don't treat this as an error. May change my mind later. */
ret = 0;
goto command_cleanup;
case COMP_SUCCESS:
xhci_dbg(xhci, "Successful reset device command.\n");
break;
default:
if (xhci_is_vendor_info_code(xhci, ret))
break;
xhci_warn(xhci, "Unknown completion code %u for "
"reset device command.\n", ret);
ret = -EINVAL;
goto command_cleanup;
}
/* Everything but endpoint 0 is disabled, so free or cache the rings. */
last_freed_endpoint = 1;
for (i = 1; i < 31; ++i) {
if (!virt_dev->eps[i].ring)
continue;
xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i);
last_freed_endpoint = i;
}
xhci_dbg(xhci, "Output context after successful reset device cmd:\n");
xhci_dbg_ctx(xhci, virt_dev->out_ctx, last_freed_endpoint);
ret = 0;
command_cleanup:
xhci_free_command(xhci, reset_device_cmd);
return ret;
}
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
/*
* At this point, the struct usb_device is about to go away, the device has
* disconnected, and all traffic has been stopped and the endpoints have been
* disabled. Free any HC data structures associated with that device.
*/
void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
USB: xhci: Add watchdog timer for URB cancellation. In order to giveback a canceled URB, we must ensure that the xHCI hardware will not access the buffer in an URB. We can't modify the buffer pointers on endpoint rings without issuing and waiting for a stop endpoint command. Since URBs can be canceled in interrupt context, we can't wait on that command. The old code trusted that the host controller would respond to the command, and would giveback the URBs in the event handler. If the hardware never responds to the stop endpoint command, the URBs will never be completed, and we might hang the USB subsystem. Implement a watchdog timer that is spawned whenever a stop endpoint command is queued. If a stop endpoint command event is found on the event ring during an interrupt, we need to stop the watchdog timer with del_timer(). Since del_timer() can fail if the timer is running and waiting on the xHCI lock, we need a way to signal to the timer that everything is fine and it should exit. If we simply clear EP_HALT_PENDING, a new stop endpoint command could sneak in and set it before the watchdog timer can grab the lock. Instead we use a combination of the EP_HALT_PENDING flag and a counter for the number of pending stop endpoint commands (xhci_virt_ep->stop_cmds_pending). If we need to cancel the watchdog timer and del_timer() succeeds, we decrement the number of pending stop endpoint commands. If del_timer() fails, we leave the number of pending stop endpoint commands alone. In either case, we clear the EP_HALT_PENDING flag. The timer will decrement the number of pending stop endpoint commands once it obtains the lock. If the timer is the tail end of the last stop endpoint command (xhci_virt_ep->stop_cmds_pending == 0), and the endpoint's command is still pending (EP_HALT_PENDING is set), we assume the host is dying. The watchdog timer will set XHCI_STATE_DYING, try to halt the xHCI host, and give back all pending URBs. Various other places in the driver need to check whether the xHCI host is dying. If the interrupt handler ever notices, it should immediately stop processing events. The URB enqueue function should also return -ESHUTDOWN. The URB dequeue function should simply return the value of usb_hcd_check_unlink_urb() and the watchdog timer will take care of giving the URB back. When a device is disconnected, the xHCI hardware structures should be freed without issuing a disable slot command (since the hardware probably won't respond to it anyway). The debugging polling loop should stop polling if the host is dying. When a device is disconnected, any pending watchdog timers are killed with del_timer_sync(). It must be synchronous so that the watchdog timer doesn't attempt to access the freed endpoint structures. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:57:01 +00:00
struct xhci_virt_device *virt_dev;
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
unsigned long flags;
USB: xhci: Don't wait for a disable slot cmd when HC dies. When the host controller dies or is removed while a device is plugged in, the USB core will attempt to deallocate the struct usb_device. That will call into xhci_free_dev(). This function used to attempt to submit a disable slot command to the host controller and clean up the device structures when that command returned. Change xhci_free_dev() to skip the command submission and just free the memory if the host controller died. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-16 23:42:39 +00:00
u32 state;
USB: xHCI: Add pointer to udev in struct xhci_virt_device Add a pointer to udev in struct xhci_virt_device. When allocate a new virt_device, make the pointer point to the corresponding udev. Modify xhci_check_args(), check if virt_dev->udev matches the target udev, to make sure command is issued to the right device. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:45 +00:00
int i, ret;
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
USB: xHCI: Add pointer to udev in struct xhci_virt_device Add a pointer to udev in struct xhci_virt_device. When allocate a new virt_device, make the pointer point to the corresponding udev. Modify xhci_check_args(), check if virt_dev->udev matches the target udev, to make sure command is issued to the right device. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:45 +00:00
ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__);
if (ret <= 0)
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
return;
USB: xHCI: Add pointer to udev in struct xhci_virt_device Add a pointer to udev in struct xhci_virt_device. When allocate a new virt_device, make the pointer point to the corresponding udev. Modify xhci_check_args(), check if virt_dev->udev matches the target udev, to make sure command is issued to the right device. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:45 +00:00
USB: xhci: Add watchdog timer for URB cancellation. In order to giveback a canceled URB, we must ensure that the xHCI hardware will not access the buffer in an URB. We can't modify the buffer pointers on endpoint rings without issuing and waiting for a stop endpoint command. Since URBs can be canceled in interrupt context, we can't wait on that command. The old code trusted that the host controller would respond to the command, and would giveback the URBs in the event handler. If the hardware never responds to the stop endpoint command, the URBs will never be completed, and we might hang the USB subsystem. Implement a watchdog timer that is spawned whenever a stop endpoint command is queued. If a stop endpoint command event is found on the event ring during an interrupt, we need to stop the watchdog timer with del_timer(). Since del_timer() can fail if the timer is running and waiting on the xHCI lock, we need a way to signal to the timer that everything is fine and it should exit. If we simply clear EP_HALT_PENDING, a new stop endpoint command could sneak in and set it before the watchdog timer can grab the lock. Instead we use a combination of the EP_HALT_PENDING flag and a counter for the number of pending stop endpoint commands (xhci_virt_ep->stop_cmds_pending). If we need to cancel the watchdog timer and del_timer() succeeds, we decrement the number of pending stop endpoint commands. If del_timer() fails, we leave the number of pending stop endpoint commands alone. In either case, we clear the EP_HALT_PENDING flag. The timer will decrement the number of pending stop endpoint commands once it obtains the lock. If the timer is the tail end of the last stop endpoint command (xhci_virt_ep->stop_cmds_pending == 0), and the endpoint's command is still pending (EP_HALT_PENDING is set), we assume the host is dying. The watchdog timer will set XHCI_STATE_DYING, try to halt the xHCI host, and give back all pending URBs. Various other places in the driver need to check whether the xHCI host is dying. If the interrupt handler ever notices, it should immediately stop processing events. The URB enqueue function should also return -ESHUTDOWN. The URB dequeue function should simply return the value of usb_hcd_check_unlink_urb() and the watchdog timer will take care of giving the URB back. When a device is disconnected, the xHCI hardware structures should be freed without issuing a disable slot command (since the hardware probably won't respond to it anyway). The debugging polling loop should stop polling if the host is dying. When a device is disconnected, any pending watchdog timers are killed with del_timer_sync(). It must be synchronous so that the watchdog timer doesn't attempt to access the freed endpoint structures. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:57:01 +00:00
virt_dev = xhci->devs[udev->slot_id];
/* Stop any wayward timer functions (which may grab the lock) */
for (i = 0; i < 31; ++i) {
virt_dev->eps[i].ep_state &= ~EP_HALT_PENDING;
del_timer_sync(&virt_dev->eps[i].stop_cmd_timer);
}
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
spin_lock_irqsave(&xhci->lock, flags);
USB: xhci: Don't wait for a disable slot cmd when HC dies. When the host controller dies or is removed while a device is plugged in, the USB core will attempt to deallocate the struct usb_device. That will call into xhci_free_dev(). This function used to attempt to submit a disable slot command to the host controller and clean up the device structures when that command returned. Change xhci_free_dev() to skip the command submission and just free the memory if the host controller died. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-16 23:42:39 +00:00
/* Don't disable the slot if the host controller is dead. */
state = xhci_readl(xhci, &xhci->op_regs->status);
USB: xhci: Add watchdog timer for URB cancellation. In order to giveback a canceled URB, we must ensure that the xHCI hardware will not access the buffer in an URB. We can't modify the buffer pointers on endpoint rings without issuing and waiting for a stop endpoint command. Since URBs can be canceled in interrupt context, we can't wait on that command. The old code trusted that the host controller would respond to the command, and would giveback the URBs in the event handler. If the hardware never responds to the stop endpoint command, the URBs will never be completed, and we might hang the USB subsystem. Implement a watchdog timer that is spawned whenever a stop endpoint command is queued. If a stop endpoint command event is found on the event ring during an interrupt, we need to stop the watchdog timer with del_timer(). Since del_timer() can fail if the timer is running and waiting on the xHCI lock, we need a way to signal to the timer that everything is fine and it should exit. If we simply clear EP_HALT_PENDING, a new stop endpoint command could sneak in and set it before the watchdog timer can grab the lock. Instead we use a combination of the EP_HALT_PENDING flag and a counter for the number of pending stop endpoint commands (xhci_virt_ep->stop_cmds_pending). If we need to cancel the watchdog timer and del_timer() succeeds, we decrement the number of pending stop endpoint commands. If del_timer() fails, we leave the number of pending stop endpoint commands alone. In either case, we clear the EP_HALT_PENDING flag. The timer will decrement the number of pending stop endpoint commands once it obtains the lock. If the timer is the tail end of the last stop endpoint command (xhci_virt_ep->stop_cmds_pending == 0), and the endpoint's command is still pending (EP_HALT_PENDING is set), we assume the host is dying. The watchdog timer will set XHCI_STATE_DYING, try to halt the xHCI host, and give back all pending URBs. Various other places in the driver need to check whether the xHCI host is dying. If the interrupt handler ever notices, it should immediately stop processing events. The URB enqueue function should also return -ESHUTDOWN. The URB dequeue function should simply return the value of usb_hcd_check_unlink_urb() and the watchdog timer will take care of giving the URB back. When a device is disconnected, the xHCI hardware structures should be freed without issuing a disable slot command (since the hardware probably won't respond to it anyway). The debugging polling loop should stop polling if the host is dying. When a device is disconnected, any pending watchdog timers are killed with del_timer_sync(). It must be synchronous so that the watchdog timer doesn't attempt to access the freed endpoint structures. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-27 17:57:01 +00:00
if (state == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING)) {
USB: xhci: Don't wait for a disable slot cmd when HC dies. When the host controller dies or is removed while a device is plugged in, the USB core will attempt to deallocate the struct usb_device. That will call into xhci_free_dev(). This function used to attempt to submit a disable slot command to the host controller and clean up the device structures when that command returned. Change xhci_free_dev() to skip the command submission and just free the memory if the host controller died. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-16 23:42:39 +00:00
xhci_free_virt_device(xhci, udev->slot_id);
spin_unlock_irqrestore(&xhci->lock, flags);
return;
}
USB: xhci: Avoid global namespace pollution. Make all globally visible functions start with xhci_ and mark functions as static if they're only called within the same C file. Fix some long lines while we're at it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:05:20 +00:00
if (xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) {
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");
return;
}
USB: xhci: Avoid global namespace pollution. Make all globally visible functions start with xhci_ and mark functions as static if they're only called within the same C file. Fix some long lines while we're at it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:05:20 +00:00
xhci_ring_cmd_db(xhci);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
spin_unlock_irqrestore(&xhci->lock, flags);
/*
* Event command completion handler will free any data structures
USB: xhci: Respect critical sections. Narrow down time spent holding the xHCI spinlock so that it's only used to protect the xHCI rings, not as mutual exclusion. Stop allocating memory while holding the spinlock and calling xhci_alloc_virt_device() and xhci_endpoint_init(). The USB core should have locking in it to prevent device state to be manipulated by more than one kernel thread. E.g. you can't free a device while you're in the middle of setting a new configuration. So removing the locks from the sections where xhci_alloc_dev() and xhci_reset_bandwidth() touch xHCI's representation of the device should be OK. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-05-14 18:44:22 +00:00
* associated with the slot. XXX Can free sleep?
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
*/
}
/*
* Returns 0 if the xHC ran out of device slots, the Enable Slot command
* timed out, or allocating memory failed. Returns 1 on success.
*/
int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
unsigned long flags;
int timeleft;
int ret;
spin_lock_irqsave(&xhci->lock, flags);
USB: xhci: Avoid global namespace pollution. Make all globally visible functions start with xhci_ and mark functions as static if they're only called within the same C file. Fix some long lines while we're at it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:05:20 +00:00
ret = xhci_queue_slot_control(xhci, TRB_ENABLE_SLOT, 0);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
if (ret) {
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");
return 0;
}
USB: xhci: Avoid global namespace pollution. Make all globally visible functions start with xhci_ and mark functions as static if they're only called within the same C file. Fix some long lines while we're at it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:05:20 +00:00
xhci_ring_cmd_db(xhci);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
spin_unlock_irqrestore(&xhci->lock, flags);
/* XXX: how much time for xHC slot assignment? */
timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev,
USB_CTRL_SET_TIMEOUT);
if (timeleft <= 0) {
xhci_warn(xhci, "%s while waiting for a slot\n",
timeleft == 0 ? "Timeout" : "Signal");
/* FIXME cancel the enable slot request */
return 0;
}
if (!xhci->slot_id) {
xhci_err(xhci, "Error while assigning device slot ID\n");
return 0;
}
USB: xhci: Respect critical sections. Narrow down time spent holding the xHCI spinlock so that it's only used to protect the xHCI rings, not as mutual exclusion. Stop allocating memory while holding the spinlock and calling xhci_alloc_virt_device() and xhci_endpoint_init(). The USB core should have locking in it to prevent device state to be manipulated by more than one kernel thread. E.g. you can't free a device while you're in the middle of setting a new configuration. So removing the locks from the sections where xhci_alloc_dev() and xhci_reset_bandwidth() touch xHCI's representation of the device should be OK. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-05-14 18:44:22 +00:00
/* xhci_alloc_virt_device() does not touch rings; no need to lock */
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
if (!xhci_alloc_virt_device(xhci, xhci->slot_id, udev, GFP_KERNEL)) {
/* Disable slot, if we can do it without mem alloc */
xhci_warn(xhci, "Could not allocate xHCI USB device data structures\n");
USB: xhci: Respect critical sections. Narrow down time spent holding the xHCI spinlock so that it's only used to protect the xHCI rings, not as mutual exclusion. Stop allocating memory while holding the spinlock and calling xhci_alloc_virt_device() and xhci_endpoint_init(). The USB core should have locking in it to prevent device state to be manipulated by more than one kernel thread. E.g. you can't free a device while you're in the middle of setting a new configuration. So removing the locks from the sections where xhci_alloc_dev() and xhci_reset_bandwidth() touch xHCI's representation of the device should be OK. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-05-14 18:44:22 +00:00
spin_lock_irqsave(&xhci->lock, flags);
USB: xhci: Avoid global namespace pollution. Make all globally visible functions start with xhci_ and mark functions as static if they're only called within the same C file. Fix some long lines while we're at it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:05:20 +00:00
if (!xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id))
xhci_ring_cmd_db(xhci);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
spin_unlock_irqrestore(&xhci->lock, flags);
return 0;
}
udev->slot_id = xhci->slot_id;
/* Is this a LS or FS device under a HS hub? */
/* Hub or peripherial? */
return 1;
}
/*
* Issue an Address Device command (which will issue a SetAddress request to
* the device).
* We should be protected by the usb_address0_mutex in khubd's hub_port_init, so
* we should only issue and wait on one address command at the same time.
*
* We add one to the device address issued by the hardware because the USB core
* uses address 1 for the root hubs (even though they're not really devices).
*/
int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev)
{
unsigned long flags;
int timeleft;
struct xhci_virt_device *virt_dev;
int ret = 0;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
struct xhci_slot_ctx *slot_ctx;
struct xhci_input_control_ctx *ctrl_ctx;
USB: xhci: Represent 64-bit addresses with one u64. There are several xHCI data structures that use two 32-bit fields to represent a 64-bit address. Since some architectures don't support 64-bit PCI writes, the fields need to be written in two 32-bit writes. The xHCI specification says that if a platform is incapable of generating 64-bit writes, software must write the low 32-bits first, then the high 32-bits. Hardware that supports 64-bit addressing will wait for the high 32-bit write before reading the revised value, and hardware that only supports 32-bit writes will ignore the high 32-bit write. Previous xHCI code represented 64-bit addresses with two u32 values. This lead to buggy code that would write the 32-bits in the wrong order, or forget to write the upper 32-bits. Change the two u32s to one u64 and create a function call to write all 64-bit addresses in the proper order. This new function could be modified in the future if all platforms support 64-bit writes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:31 +00:00
u64 temp_64;
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
if (!udev->slot_id) {
xhci_dbg(xhci, "Bad Slot ID %d\n", udev->slot_id);
return -EINVAL;
}
virt_dev = xhci->devs[udev->slot_id];
USB: xHCI: change xhci_reset_device() to allocate new device Rename xhci_reset_device() to xhci_discover_or_reset_device(). If xhci_discover_or_reset_device() is called to reset a device which does not exist or does not match the udev, it calls xhci_alloc_dev() to re-allocate the device. This would prevent the reset device failure, possibly due to the xHC restore error during S3/S4 resume. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:48 +00:00
slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
/*
* If this is the first Set Address since device plug-in or
* virt_device realloaction after a resume with an xHCI power loss,
* then set up the slot context.
*/
if (!slot_ctx->dev_info)
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
xhci_setup_addressable_virt_dev(xhci, udev);
USB: xHCI: change xhci_reset_device() to allocate new device Rename xhci_reset_device() to xhci_discover_or_reset_device(). If xhci_discover_or_reset_device() is called to reset a device which does not exist or does not match the udev, it calls xhci_alloc_dev() to re-allocate the device. This would prevent the reset device failure, possibly due to the xHC restore error during S3/S4 resume. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-14 14:22:48 +00:00
/* Otherwise, update the control endpoint ring enqueue pointer. */
USB: xhci: Set EP0 dequeue ptr after reset of configured device. When a configured device is reset, the control endpoint's ring is reused. If control transfers to the device were issued before the device is reset, the dequeue pointer will be somewhere in the middle of the ring. If the device is then issued an address with the set address command, the xHCI driver must provide a valid input context for control endpoint zero. The original code would give the hardware the original input context, which had a dequeue pointer set to the top of the ring. This would cause the host to re-execute any control transfers until it reached the ring's enqueue pointer. When issuing a set address command for a device that has just been configured and then reset, use the control endpoint's enqueue pointer as the hardware's dequeue pointer. Assumption: All control transfers will be completed or cancelled before the set address command is issued to the device. If there are any outstanding control transfers, this code will not work. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-09 15:08:54 +00:00
else
xhci_copy_ep0_dequeue_into_input_ctx(xhci, udev);
USB: xhci: Make debugging more verbose. Add more debugging to the irq handler, slot context initialization, ring operations, URB cancellation, and MMIO writes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:46 +00:00
xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id);
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
USB: xhci: Respect critical sections. Narrow down time spent holding the xHCI spinlock so that it's only used to protect the xHCI rings, not as mutual exclusion. Stop allocating memory while holding the spinlock and calling xhci_alloc_virt_device() and xhci_endpoint_init(). The USB core should have locking in it to prevent device state to be manipulated by more than one kernel thread. E.g. you can't free a device while you're in the middle of setting a new configuration. So removing the locks from the sections where xhci_alloc_dev() and xhci_reset_bandwidth() touch xHCI's representation of the device should be OK. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-05-14 18:44:22 +00:00
spin_lock_irqsave(&xhci->lock, flags);
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
ret = xhci_queue_address_device(xhci, virt_dev->in_ctx->dma,
udev->slot_id);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
if (ret) {
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");
return ret;
}
USB: xhci: Avoid global namespace pollution. Make all globally visible functions start with xhci_ and mark functions as static if they're only called within the same C file. Fix some long lines while we're at it. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:05:20 +00:00
xhci_ring_cmd_db(xhci);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
spin_unlock_irqrestore(&xhci->lock, flags);
/* ctrl tx can take up to 5 sec; XXX: need more time for xHC? */
timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev,
USB_CTRL_SET_TIMEOUT);
/* FIXME: From section 4.3.4: "Software shall be responsible for timing
* the SetAddress() "recovery interval" required by USB and aborting the
* command on a timeout.
*/
if (timeleft <= 0) {
xhci_warn(xhci, "%s while waiting for a slot\n",
timeleft == 0 ? "Timeout" : "Signal");
/* FIXME cancel the address device command */
return -ETIME;
}
switch (virt_dev->cmd_status) {
case COMP_CTX_STATE:
case COMP_EBADSLT:
xhci_err(xhci, "Setup ERROR: address device command for slot %d.\n",
udev->slot_id);
ret = -EINVAL;
break;
case COMP_TX_ERR:
dev_warn(&udev->dev, "Device not responding to set address.\n");
ret = -EPROTO;
break;
case COMP_SUCCESS:
xhci_dbg(xhci, "Successful Address Device command\n");
break;
default:
xhci_err(xhci, "ERROR: unexpected command completion "
"code 0x%x.\n", virt_dev->cmd_status);
USB: xhci: Make debugging more verbose. Add more debugging to the irq handler, slot context initialization, ring operations, URB cancellation, and MMIO writes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:46 +00:00
xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id);
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
ret = -EINVAL;
break;
}
if (ret) {
return ret;
}
USB: xhci: Represent 64-bit addresses with one u64. There are several xHCI data structures that use two 32-bit fields to represent a 64-bit address. Since some architectures don't support 64-bit PCI writes, the fields need to be written in two 32-bit writes. The xHCI specification says that if a platform is incapable of generating 64-bit writes, software must write the low 32-bits first, then the high 32-bits. Hardware that supports 64-bit addressing will wait for the high 32-bit write before reading the revised value, and hardware that only supports 32-bit writes will ignore the high 32-bit write. Previous xHCI code represented 64-bit addresses with two u32 values. This lead to buggy code that would write the 32-bits in the wrong order, or forget to write the upper 32-bits. Change the two u32s to one u64 and create a function call to write all 64-bit addresses in the proper order. This new function could be modified in the future if all platforms support 64-bit writes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:31 +00:00
temp_64 = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr);
xhci_dbg(xhci, "Op regs DCBAA ptr = %#016llx\n", temp_64);
xhci_dbg(xhci, "Slot ID %d dcbaa entry @%p = %#016llx\n",
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
udev->slot_id,
USB: xhci: Represent 64-bit addresses with one u64. There are several xHCI data structures that use two 32-bit fields to represent a 64-bit address. Since some architectures don't support 64-bit PCI writes, the fields need to be written in two 32-bit writes. The xHCI specification says that if a platform is incapable of generating 64-bit writes, software must write the low 32-bits first, then the high 32-bits. Hardware that supports 64-bit addressing will wait for the high 32-bit write before reading the revised value, and hardware that only supports 32-bit writes will ignore the high 32-bit write. Previous xHCI code represented 64-bit addresses with two u32 values. This lead to buggy code that would write the 32-bits in the wrong order, or forget to write the upper 32-bits. Change the two u32s to one u64 and create a function call to write all 64-bit addresses in the proper order. This new function could be modified in the future if all platforms support 64-bit writes. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:03:31 +00:00
&xhci->dcbaa->dev_context_ptrs[udev->slot_id],
(unsigned long long)
xhci->dcbaa->dev_context_ptrs[udev->slot_id]);
USB: xhci: fix lots of compiler warnings. Turns out someone never built this code on a 64bit platform. Someone owes me a beer... Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-30 02:14:08 +00:00
xhci_dbg(xhci, "Output Context DMA address = %#08llx\n",
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
(unsigned long long)virt_dev->out_ctx->dma);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id);
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id);
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
/*
* USB core uses address 1 for the roothubs, so we add one to the
* address given back to us by the HC.
*/
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx);
USB: core: use kernel assigned address for devices under xHCI xHCI driver uses hardware assigned device address. This may cause device address conflict in certain cases. Use kernel assigned address for devices under xHCI. Store the xHC assigned address locally in xHCI driver. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
2010-10-14 14:22:51 +00:00
/* Use kernel assigned address for devices; store xHC assigned
* address locally. */
virt_dev->address = (slot_ctx->dev_state & DEV_ADDR_MASK) + 1;
USB: xhci: Bandwidth allocation support Since the xHCI host controller hardware (xHC) has an internal schedule, it needs a better representation of what devices are consuming bandwidth on the bus. Each device is represented by a device context, with data about the device, endpoints, and pointers to each endpoint ring. We need to update the endpoint information for a device context before a new configuration or alternate interface setting is selected. We setup an input device context with modified endpoint information and newly allocated endpoint rings, and then submit a Configure Endpoint Command to the hardware. The host controller can reject the new configuration if it exceeds the bus bandwidth, or the host controller doesn't have enough internal resources for the configuration. If the command fails, we still have the older device context with the previous configuration. If the command succeeds, we free the old endpoint rings. The root hub isn't a real device, so always say yes to any bandwidth changes for it. The USB core will enable, disable, and then enable endpoint 0 several times during the initialization sequence. The device will always have an endpoint ring for endpoint 0 and bandwidth allocated for that, unless the device is disconnected or gets a SetAddress 0 request. So we don't pay attention for when xhci_check_bandwidth() is called for a re-add of endpoint 0. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:58:38 +00:00
/* Zero the input context control for later use */
USB: xhci: Support for 64-byte contexts Adds support for controllers that use 64-byte contexts. The following context data structures are affected by this: Device, Input, Input Control, Endpoint, and Slot. To accommodate the use of either 32 or 64-byte contexts, a Device or Input context can only be accessed through functions which look-up and return pointers to their contained contexts. Signed-off-by: John Youn <johnyoun@synopsys.com> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-07-27 19:05:15 +00:00
ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx);
ctrl_ctx->add_flags = 0;
ctrl_ctx->drop_flags = 0;
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
USB: core: use kernel assigned address for devices under xHCI xHCI driver uses hardware assigned device address. This may cause device address conflict in certain cases. Use kernel assigned address for devices under xHCI. Store the xHC assigned address locally in xHCI driver. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
2010-10-14 14:22:51 +00:00
xhci_dbg(xhci, "Internal device address = %d\n", virt_dev->address);
USB: xhci: Allocate and address USB devices xHCI needs to get a "Slot ID" from the host controller and allocate other data structures for every USB device. Make usb_alloc_dev() and usb_release_dev() allocate and free these device structures. After setting up the xHC device structures, usb_alloc_dev() must wait for the hardware to respond to an Enable Slot command. usb_alloc_dev() fires off a Disable Slot command and does not wait for it to complete. When the USB core wants to choose an address for the device, the xHCI driver must issue a Set Address command and wait for an event for that command. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:57:38 +00:00
return 0;
}
USB: xhci: Support USB hubs. For a USB hub to work under an xHCI host controller, the xHC's internal scheduler must be made aware of the hub's characteristics. Add an xHCI hook that the USB core will call after it fetches the hub descriptor. This hook will add hub information to the slot context for that device, including whether it has multiple TTs or a single TT, the number of ports on the hub, and TT think time. Setting up the slot context for the device is different for 0.95 and 0.96 xHCI host controllers. Some of the slot context reserved fields in the 0.95 specification were changed into hub fields in the 0.96 specification. Don't set the TT think time or number of ports for a hub if we're dealing with a 0.95-compliant xHCI host controller. The 0.95 xHCI specification says that to modify the hub flag, we need to issue an evaluate context command. The 0.96 specification says that flag can be set with a configure endpoint command. Issue the correct command based on the version reported by the hardware. This patch does not add support for multi-TT hubs. Multi-TT hubs expose a single TT on alt setting 0, and multi-TT on alt setting 1. The xHCI driver can't handle setting alternate interfaces yet. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:20 +00:00
/* Once a hub descriptor is fetched for a device, we need to update the xHC's
* internal data structures for the device.
*/
int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev,
struct usb_tt *tt, gfp_t mem_flags)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
struct xhci_virt_device *vdev;
struct xhci_command *config_cmd;
struct xhci_input_control_ctx *ctrl_ctx;
struct xhci_slot_ctx *slot_ctx;
unsigned long flags;
unsigned think_time;
int ret;
/* Ignore root hubs */
if (!hdev->parent)
return 0;
vdev = xhci->devs[hdev->slot_id];
if (!vdev) {
xhci_warn(xhci, "Cannot update hub desc for unknown device.\n");
return -EINVAL;
}
USB: xhci: Allow allocation of commands without input contexts. The xhci_command structure is the basic structure for issuing commands to the xHCI hardware. It contains a struct completion (so that the issuing function can wait on the command), command status, and a input context that is used to pass information to the hardware. Not all commands need the input context, so make it optional to allocate. Allow xhci_free_container_ctx() to be passed a NULL input context, to make freeing the xhci_command structure simple. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-09 23:59:03 +00:00
config_cmd = xhci_alloc_command(xhci, true, true, mem_flags);
USB: xhci: Support USB hubs. For a USB hub to work under an xHCI host controller, the xHC's internal scheduler must be made aware of the hub's characteristics. Add an xHCI hook that the USB core will call after it fetches the hub descriptor. This hook will add hub information to the slot context for that device, including whether it has multiple TTs or a single TT, the number of ports on the hub, and TT think time. Setting up the slot context for the device is different for 0.95 and 0.96 xHCI host controllers. Some of the slot context reserved fields in the 0.95 specification were changed into hub fields in the 0.96 specification. Don't set the TT think time or number of ports for a hub if we're dealing with a 0.95-compliant xHCI host controller. The 0.95 xHCI specification says that to modify the hub flag, we need to issue an evaluate context command. The 0.96 specification says that flag can be set with a configure endpoint command. Issue the correct command based on the version reported by the hardware. This patch does not add support for multi-TT hubs. Multi-TT hubs expose a single TT on alt setting 0, and multi-TT on alt setting 1. The xHCI driver can't handle setting alternate interfaces yet. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-09-04 17:53:20 +00:00
if (!config_cmd) {
xhci_dbg(xhci, "Could not allocate xHCI command structure.\n");
return -ENOMEM;
}
spin_lock_irqsave(&xhci->lock, flags);
xhci_slot_copy(xhci, config_cmd->in_ctx, vdev->out_ctx);
ctrl_ctx = xhci_get_input_control_ctx(xhci, config_cmd->in_ctx);
ctrl_ctx->add_flags |= SLOT_FLAG;
slot_ctx = xhci_get_slot_ctx(xhci, config_cmd->in_ctx);
slot_ctx->dev_info |= DEV_HUB;
if (tt->multi)
slot_ctx->dev_info |= DEV_MTT;
if (xhci->hci_version > 0x95) {
xhci_dbg(xhci, "xHCI version %x needs hub "
"TT think time and number of ports\n",
(unsigned int) xhci->hci_version);
slot_ctx->dev_info2 |= XHCI_MAX_PORTS(hdev->maxchild);
/* Set TT think time - convert from ns to FS bit times.
* 0 = 8 FS bit times, 1 = 16 FS bit times,
* 2 = 24 FS bit times, 3 = 32 FS bit times.
*/
think_time = tt->think_time;
if (think_time != 0)
think_time = (think_time / 666) - 1;
slot_ctx->tt_info |= TT_THINK_TIME(think_time);
} else {
xhci_dbg(xhci, "xHCI version %x doesn't need hub "
"TT think time or number of ports\n",
(unsigned int) xhci->hci_version);
}
slot_ctx->dev_state = 0;
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_dbg(xhci, "Set up %s for hub device.\n",
(xhci->hci_version > 0x95) ?
"configure endpoint" : "evaluate context");
xhci_dbg(xhci, "Slot %u Input Context:\n", hdev->slot_id);
xhci_dbg_ctx(xhci, config_cmd->in_ctx, 0);
/* Issue and wait for the configure endpoint or
* evaluate context command.
*/
if (xhci->hci_version > 0x95)
ret = xhci_configure_endpoint(xhci, hdev, config_cmd,
false, false);
else
ret = xhci_configure_endpoint(xhci, hdev, config_cmd,
true, false);
xhci_dbg(xhci, "Slot %u Output Context:\n", hdev->slot_id);
xhci_dbg_ctx(xhci, vdev->out_ctx, 0);
xhci_free_command(xhci, config_cmd);
return ret;
}
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
int xhci_get_frame(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
/* EHCI mods by the periodic size. Why? */
return xhci_readl(xhci, &xhci->run_regs->microframe_index) >> 3;
}
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_LICENSE("GPL");
static int __init xhci_hcd_init(void)
{
#ifdef CONFIG_PCI
int retval = 0;
retval = xhci_register_pci();
if (retval < 0) {
printk(KERN_DEBUG "Problem registering PCI driver.");
return retval;
}
#endif
USB: xhci: Remove packed attribute from structures. The packed attribute allows gcc to muck with the alignment of data structures, which may lead to byte-wise writes that break atomicity of writes. Packed should only be used when the compile may add undesired padding to the structure. Each element of the structure will be aligned by C based on its size and the size of the elements around it. E.g. a u64 would be aligned on an 8 byte boundary, the next u32 would be aligned on a four byte boundary, etc. Since most of the xHCI structures contain only u32 bit values, removing the packed attribute for them should be harmless. (A future patch will change some of the twin 32-bit address fields to one 64-bit field, but all those places have an even number of 32-bit fields before them, so the alignment should be correct.) Add BUILD_BUG_ON statements to check that the compiler doesn't add padding to the data structures that have a hardware-defined layout. While we're modifying the registers, change the name of intr_reg to xhci_intr_reg to avoid global conflicts. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-05-14 18:44:18 +00:00
/*
* Check the compiler generated sizes of structures that must be laid
* out in specific ways for hardware access.
*/
BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*32/8);
BUILD_BUG_ON(sizeof(struct xhci_slot_ctx) != 8*32/8);
BUILD_BUG_ON(sizeof(struct xhci_ep_ctx) != 8*32/8);
/* xhci_device_control has eight fields, and also
* embeds one xhci_slot_ctx and 31 xhci_ep_ctx
*/
BUILD_BUG_ON(sizeof(struct xhci_stream_ctx) != 4*32/8);
BUILD_BUG_ON(sizeof(union xhci_trb) != 4*32/8);
BUILD_BUG_ON(sizeof(struct xhci_erst_entry) != 4*32/8);
BUILD_BUG_ON(sizeof(struct xhci_cap_regs) != 7*32/8);
BUILD_BUG_ON(sizeof(struct xhci_intr_reg) != 8*32/8);
/* xhci_run_regs has eight fields and embeds 128 xhci_intr_regs */
BUILD_BUG_ON(sizeof(struct xhci_run_regs) != (8+8*128)*32/8);
BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*32/8);
USB: xhci: BIOS handoff and HW initialization. Add PCI initialization code to take control of the xHCI host controller away from the BIOS, halt, and reset the host controller. The xHCI spec says that BIOSes must give up the host controller within 5 seconds. Add some host controller glue functions to handle hardware initialization and memory allocation for the host controller. The current xHCI prototypes use PCI interrupts, but the xHCI spec requires MSI-X interrupts. Add code to support MSI-X interrupts, but use the PCI interrupts for now. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-28 02:52:28 +00:00
return 0;
}
module_init(xhci_hcd_init);
static void __exit xhci_hcd_cleanup(void)
{
#ifdef CONFIG_PCI
xhci_unregister_pci();
#endif
}
module_exit(xhci_hcd_cleanup);
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