2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* drivers/pci/setup-res.c
|
|
|
|
*
|
|
|
|
* Extruded from code written by
|
|
|
|
* Dave Rusling (david.rusling@reo.mts.dec.com)
|
|
|
|
* David Mosberger (davidm@cs.arizona.edu)
|
|
|
|
* David Miller (davem@redhat.com)
|
|
|
|
*
|
|
|
|
* Support routines for initializing a PCI subsystem.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* fixed for multiple pci buses, 1999 Andrea Arcangeli <andrea@suse.de> */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Nov 2000, Ivan Kokshaysky <ink@jurassic.park.msu.ru>
|
|
|
|
* Resource sorting
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/kernel.h>
|
2011-05-27 13:37:25 +00:00
|
|
|
#include <linux/export.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
#include <linux/pci.h>
|
|
|
|
#include <linux/errno.h>
|
|
|
|
#include <linux/ioport.h>
|
|
|
|
#include <linux/cache.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include "pci.h"
|
|
|
|
|
|
|
|
|
2008-11-21 18:38:52 +00:00
|
|
|
void pci_update_resource(struct pci_dev *dev, int resno)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct pci_bus_region region;
|
2012-07-10 01:49:37 +00:00
|
|
|
bool disable;
|
|
|
|
u16 cmd;
|
2005-04-16 22:20:36 +00:00
|
|
|
u32 new, check, mask;
|
|
|
|
int reg;
|
2008-11-21 18:41:27 +00:00
|
|
|
enum pci_bar_type type;
|
2008-11-21 18:38:52 +00:00
|
|
|
struct resource *res = dev->resource + resno;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-12-19 21:12:08 +00:00
|
|
|
/*
|
|
|
|
* Ignore resources for unimplemented BARs and unused resource slots
|
|
|
|
* for 64 bit BARs.
|
|
|
|
*/
|
2005-08-07 09:49:59 +00:00
|
|
|
if (!res->flags)
|
|
|
|
return;
|
|
|
|
|
2014-02-26 18:25:59 +00:00
|
|
|
if (res->flags & IORESOURCE_UNSET)
|
|
|
|
return;
|
|
|
|
|
2006-12-19 21:12:08 +00:00
|
|
|
/*
|
|
|
|
* Ignore non-moveable resources. This might be legacy resources for
|
|
|
|
* which no functional BAR register exists or another important
|
2008-06-13 16:52:11 +00:00
|
|
|
* system resource we shouldn't move around.
|
2006-12-19 21:12:08 +00:00
|
|
|
*/
|
|
|
|
if (res->flags & IORESOURCE_PCI_FIXED)
|
|
|
|
return;
|
|
|
|
|
PCI: Convert pcibios_resource_to_bus() to take a pci_bus, not a pci_dev
These interfaces:
pcibios_resource_to_bus(struct pci_dev *dev, *bus_region, *resource)
pcibios_bus_to_resource(struct pci_dev *dev, *resource, *bus_region)
took a pci_dev, but they really depend only on the pci_bus. And we want to
use them in resource allocation paths where we have the bus but not a
device, so this patch converts them to take the pci_bus instead of the
pci_dev:
pcibios_resource_to_bus(struct pci_bus *bus, *bus_region, *resource)
pcibios_bus_to_resource(struct pci_bus *bus, *resource, *bus_region)
In fact, with standard PCI-PCI bridges, they only depend on the host
bridge, because that's the only place address translation occurs, but
we aren't going that far yet.
[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2013-12-10 06:54:40 +00:00
|
|
|
pcibios_resource_to_bus(dev->bus, ®ion, res);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
new = region.start | (res->flags & PCI_REGION_FLAG_MASK);
|
|
|
|
if (res->flags & IORESOURCE_IO)
|
|
|
|
mask = (u32)PCI_BASE_ADDRESS_IO_MASK;
|
|
|
|
else
|
|
|
|
mask = (u32)PCI_BASE_ADDRESS_MEM_MASK;
|
|
|
|
|
2008-11-21 18:41:27 +00:00
|
|
|
reg = pci_resource_bar(dev, resno, &type);
|
|
|
|
if (!reg)
|
|
|
|
return;
|
|
|
|
if (type != pci_bar_unknown) {
|
2005-08-26 17:49:22 +00:00
|
|
|
if (!(res->flags & IORESOURCE_ROM_ENABLE))
|
|
|
|
return;
|
|
|
|
new |= PCI_ROM_ADDRESS_ENABLE;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2012-07-10 01:49:37 +00:00
|
|
|
/*
|
|
|
|
* We can't update a 64-bit BAR atomically, so when possible,
|
|
|
|
* disable decoding so that a half-updated BAR won't conflict
|
|
|
|
* with another device.
|
|
|
|
*/
|
|
|
|
disable = (res->flags & IORESOURCE_MEM_64) && !dev->mmio_always_on;
|
|
|
|
if (disable) {
|
|
|
|
pci_read_config_word(dev, PCI_COMMAND, &cmd);
|
|
|
|
pci_write_config_word(dev, PCI_COMMAND,
|
|
|
|
cmd & ~PCI_COMMAND_MEMORY);
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
pci_write_config_dword(dev, reg, new);
|
|
|
|
pci_read_config_dword(dev, reg, &check);
|
|
|
|
|
|
|
|
if ((new ^ check) & mask) {
|
2008-06-13 16:52:11 +00:00
|
|
|
dev_err(&dev->dev, "BAR %d: error updating (%#08x != %#08x)\n",
|
|
|
|
resno, new, check);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2011-06-14 19:04:35 +00:00
|
|
|
if (res->flags & IORESOURCE_MEM_64) {
|
2005-08-07 09:49:59 +00:00
|
|
|
new = region.start >> 16 >> 16;
|
2005-04-16 22:20:36 +00:00
|
|
|
pci_write_config_dword(dev, reg + 4, new);
|
|
|
|
pci_read_config_dword(dev, reg + 4, &check);
|
|
|
|
if (check != new) {
|
2008-06-13 16:52:11 +00:00
|
|
|
dev_err(&dev->dev, "BAR %d: error updating "
|
|
|
|
"(high %#08x != %#08x)\n", resno, new, check);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
}
|
2012-07-10 01:49:37 +00:00
|
|
|
|
|
|
|
if (disable)
|
|
|
|
pci_write_config_word(dev, PCI_COMMAND, cmd);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2007-03-27 05:53:30 +00:00
|
|
|
int pci_claim_resource(struct pci_dev *dev, int resource)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct resource *res = &dev->resource[resource];
|
2010-03-12 00:01:19 +00:00
|
|
|
struct resource *root, *conflict;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2014-02-26 18:25:59 +00:00
|
|
|
if (res->flags & IORESOURCE_UNSET) {
|
|
|
|
dev_info(&dev->dev, "can't claim BAR %d %pR: no address assigned\n",
|
|
|
|
resource, res);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2009-06-17 20:33:33 +00:00
|
|
|
root = pci_find_parent_resource(dev, res);
|
2009-11-04 17:32:57 +00:00
|
|
|
if (!root) {
|
2014-02-26 18:25:59 +00:00
|
|
|
dev_info(&dev->dev, "can't claim BAR %d %pR: no compatible bridge window\n",
|
|
|
|
resource, res);
|
2009-11-04 17:32:57 +00:00
|
|
|
return -EINVAL;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2010-03-12 00:01:19 +00:00
|
|
|
conflict = request_resource_conflict(root, res);
|
|
|
|
if (conflict) {
|
2014-02-26 18:25:59 +00:00
|
|
|
dev_info(&dev->dev, "can't claim BAR %d %pR: address conflict with %s %pR\n",
|
|
|
|
resource, res, conflict->name, conflict);
|
2010-03-12 00:01:19 +00:00
|
|
|
return -EBUSY;
|
|
|
|
}
|
2009-11-04 17:32:57 +00:00
|
|
|
|
2010-03-12 00:01:19 +00:00
|
|
|
return 0;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2009-07-01 04:45:44 +00:00
|
|
|
EXPORT_SYMBOL(pci_claim_resource);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-03-16 08:13:39 +00:00
|
|
|
void pci_disable_bridge_window(struct pci_dev *dev)
|
|
|
|
{
|
2009-11-04 17:32:57 +00:00
|
|
|
dev_info(&dev->dev, "disabling bridge mem windows\n");
|
2009-03-16 08:13:39 +00:00
|
|
|
|
|
|
|
/* MMIO Base/Limit */
|
|
|
|
pci_write_config_dword(dev, PCI_MEMORY_BASE, 0x0000fff0);
|
|
|
|
|
|
|
|
/* Prefetchable MMIO Base/Limit */
|
|
|
|
pci_write_config_dword(dev, PCI_PREF_LIMIT_UPPER32, 0);
|
|
|
|
pci_write_config_dword(dev, PCI_PREF_MEMORY_BASE, 0x0000fff0);
|
|
|
|
pci_write_config_dword(dev, PCI_PREF_BASE_UPPER32, 0xffffffff);
|
|
|
|
}
|
2011-07-25 20:08:39 +00:00
|
|
|
|
2011-11-21 18:54:19 +00:00
|
|
|
/*
|
|
|
|
* Generic function that returns a value indicating that the device's
|
|
|
|
* original BIOS BAR address was not saved and so is not available for
|
|
|
|
* reinstatement.
|
|
|
|
*
|
|
|
|
* Can be over-ridden by architecture specific code that implements
|
|
|
|
* reinstatement functionality rather than leaving it disabled when
|
|
|
|
* normal allocation attempts fail.
|
|
|
|
*/
|
|
|
|
resource_size_t __weak pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-11-14 18:28:18 +00:00
|
|
|
static int pci_revert_fw_address(struct resource *res, struct pci_dev *dev,
|
2011-07-25 20:08:39 +00:00
|
|
|
int resno, resource_size_t size)
|
|
|
|
{
|
|
|
|
struct resource *root, *conflict;
|
2011-11-21 18:54:19 +00:00
|
|
|
resource_size_t fw_addr, start, end;
|
2011-07-25 20:08:39 +00:00
|
|
|
int ret = 0;
|
PCI: fall back to original BIOS BAR addresses
If we fail to assign resources to a PCI BAR, this patch makes us try the
original address from BIOS rather than leaving it disabled.
Linux tries to make sure all PCI device BARs are inside the upstream
PCI host bridge or P2P bridge apertures, reassigning BARs if necessary.
Windows does similar reassignment.
Before this patch, if we could not move a BAR into an aperture, we left
the resource unassigned, i.e., at address zero. Windows leaves such BARs
at the original BIOS addresses, and this patch makes Linux do the same.
This is a bit ugly because we disable the resource long before we try to
reassign it, so we have to keep track of the BIOS BAR address somewhere.
For lack of a better place, I put it in the struct pci_dev.
I think it would be cleaner to attempt the assignment immediately when the
claim fails, so we could easily remember the original address. But we
currently claim motherboard resources in the middle, after attempting to
claim PCI resources and before assigning new PCI resources, and changing
that is a fairly big job.
Addresses https://bugzilla.kernel.org/show_bug.cgi?id=16263
Reported-by: Andrew <nitr0@seti.kr.ua>
Tested-by: Andrew <nitr0@seti.kr.ua>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-07-15 15:41:42 +00:00
|
|
|
|
2011-11-21 18:54:19 +00:00
|
|
|
fw_addr = pcibios_retrieve_fw_addr(dev, resno);
|
|
|
|
if (!fw_addr)
|
|
|
|
return 1;
|
|
|
|
|
2011-07-25 20:08:39 +00:00
|
|
|
start = res->start;
|
|
|
|
end = res->end;
|
2011-11-21 18:54:19 +00:00
|
|
|
res->start = fw_addr;
|
2011-07-25 20:08:39 +00:00
|
|
|
res->end = res->start + size - 1;
|
2011-11-21 18:54:07 +00:00
|
|
|
|
|
|
|
root = pci_find_parent_resource(dev, res);
|
|
|
|
if (!root) {
|
|
|
|
if (res->flags & IORESOURCE_IO)
|
|
|
|
root = &ioport_resource;
|
|
|
|
else
|
|
|
|
root = &iomem_resource;
|
|
|
|
}
|
|
|
|
|
2011-07-25 20:08:39 +00:00
|
|
|
dev_info(&dev->dev, "BAR %d: trying firmware assignment %pR\n",
|
|
|
|
resno, res);
|
|
|
|
conflict = request_resource_conflict(root, res);
|
|
|
|
if (conflict) {
|
|
|
|
dev_info(&dev->dev,
|
|
|
|
"BAR %d: %pR conflicts with %s %pR\n", resno,
|
|
|
|
res, conflict->name, conflict);
|
|
|
|
res->start = start;
|
|
|
|
res->end = end;
|
|
|
|
ret = 1;
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-07-11 23:05:43 +00:00
|
|
|
static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev,
|
|
|
|
int resno, resource_size_t size, resource_size_t align)
|
|
|
|
{
|
|
|
|
struct resource *res = dev->resource + resno;
|
|
|
|
resource_size_t min;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
min = (res->flags & IORESOURCE_IO) ? PCIBIOS_MIN_IO : PCIBIOS_MIN_MEM;
|
|
|
|
|
|
|
|
/* First, try exact prefetching match.. */
|
|
|
|
ret = pci_bus_alloc_resource(bus, res, size, align, min,
|
|
|
|
IORESOURCE_PREFETCH,
|
|
|
|
pcibios_align_resource, dev);
|
|
|
|
|
|
|
|
if (ret < 0 && (res->flags & IORESOURCE_PREFETCH)) {
|
|
|
|
/*
|
|
|
|
* That failed.
|
|
|
|
*
|
|
|
|
* But a prefetching area can handle a non-prefetching
|
|
|
|
* window (it will just not perform as well).
|
|
|
|
*/
|
|
|
|
ret = pci_bus_alloc_resource(bus, res, size, align, min, 0,
|
|
|
|
pcibios_align_resource, dev);
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-06-20 19:56:00 +00:00
|
|
|
static int _pci_assign_resource(struct pci_dev *dev, int resno,
|
|
|
|
resource_size_t size, resource_size_t min_align)
|
2011-07-25 20:08:39 +00:00
|
|
|
{
|
|
|
|
struct resource *res = dev->resource + resno;
|
|
|
|
struct pci_bus *bus;
|
|
|
|
int ret;
|
|
|
|
char *type;
|
PCI: fall back to original BIOS BAR addresses
If we fail to assign resources to a PCI BAR, this patch makes us try the
original address from BIOS rather than leaving it disabled.
Linux tries to make sure all PCI device BARs are inside the upstream
PCI host bridge or P2P bridge apertures, reassigning BARs if necessary.
Windows does similar reassignment.
Before this patch, if we could not move a BAR into an aperture, we left
the resource unassigned, i.e., at address zero. Windows leaves such BARs
at the original BIOS addresses, and this patch makes Linux do the same.
This is a bit ugly because we disable the resource long before we try to
reassign it, so we have to keep track of the BIOS BAR address somewhere.
For lack of a better place, I put it in the struct pci_dev.
I think it would be cleaner to attempt the assignment immediately when the
claim fails, so we could easily remember the original address. But we
currently claim motherboard resources in the middle, after attempting to
claim PCI resources and before assigning new PCI resources, and changing
that is a fairly big job.
Addresses https://bugzilla.kernel.org/show_bug.cgi?id=16263
Reported-by: Andrew <nitr0@seti.kr.ua>
Tested-by: Andrew <nitr0@seti.kr.ua>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-07-15 15:41:42 +00:00
|
|
|
|
2011-07-25 20:08:39 +00:00
|
|
|
bus = dev->bus;
|
|
|
|
while ((ret = __pci_assign_resource(bus, dev, resno, size, min_align))) {
|
|
|
|
if (!bus->parent || !bus->self->transparent)
|
|
|
|
break;
|
|
|
|
bus = bus->parent;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ret) {
|
|
|
|
if (res->flags & IORESOURCE_MEM)
|
|
|
|
if (res->flags & IORESOURCE_PREFETCH)
|
|
|
|
type = "mem pref";
|
|
|
|
else
|
|
|
|
type = "mem";
|
|
|
|
else if (res->flags & IORESOURCE_IO)
|
|
|
|
type = "io";
|
PCI: fall back to original BIOS BAR addresses
If we fail to assign resources to a PCI BAR, this patch makes us try the
original address from BIOS rather than leaving it disabled.
Linux tries to make sure all PCI device BARs are inside the upstream
PCI host bridge or P2P bridge apertures, reassigning BARs if necessary.
Windows does similar reassignment.
Before this patch, if we could not move a BAR into an aperture, we left
the resource unassigned, i.e., at address zero. Windows leaves such BARs
at the original BIOS addresses, and this patch makes Linux do the same.
This is a bit ugly because we disable the resource long before we try to
reassign it, so we have to keep track of the BIOS BAR address somewhere.
For lack of a better place, I put it in the struct pci_dev.
I think it would be cleaner to attempt the assignment immediately when the
claim fails, so we could easily remember the original address. But we
currently claim motherboard resources in the middle, after attempting to
claim PCI resources and before assigning new PCI resources, and changing
that is a fairly big job.
Addresses https://bugzilla.kernel.org/show_bug.cgi?id=16263
Reported-by: Andrew <nitr0@seti.kr.ua>
Tested-by: Andrew <nitr0@seti.kr.ua>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-07-15 15:41:42 +00:00
|
|
|
else
|
2011-07-25 20:08:39 +00:00
|
|
|
type = "unknown";
|
|
|
|
dev_info(&dev->dev,
|
|
|
|
"BAR %d: can't assign %s (size %#llx)\n",
|
|
|
|
resno, type, (unsigned long long) resource_size(res));
|
PCI: fall back to original BIOS BAR addresses
If we fail to assign resources to a PCI BAR, this patch makes us try the
original address from BIOS rather than leaving it disabled.
Linux tries to make sure all PCI device BARs are inside the upstream
PCI host bridge or P2P bridge apertures, reassigning BARs if necessary.
Windows does similar reassignment.
Before this patch, if we could not move a BAR into an aperture, we left
the resource unassigned, i.e., at address zero. Windows leaves such BARs
at the original BIOS addresses, and this patch makes Linux do the same.
This is a bit ugly because we disable the resource long before we try to
reassign it, so we have to keep track of the BIOS BAR address somewhere.
For lack of a better place, I put it in the struct pci_dev.
I think it would be cleaner to attempt the assignment immediately when the
claim fails, so we could easily remember the original address. But we
currently claim motherboard resources in the middle, after attempting to
claim PCI resources and before assigning new PCI resources, and changing
that is a fairly big job.
Addresses https://bugzilla.kernel.org/show_bug.cgi?id=16263
Reported-by: Andrew <nitr0@seti.kr.ua>
Tested-by: Andrew <nitr0@seti.kr.ua>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-07-15 15:41:42 +00:00
|
|
|
}
|
|
|
|
|
2011-07-25 20:08:39 +00:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2009-04-24 03:49:25 +00:00
|
|
|
int pci_assign_resource(struct pci_dev *dev, int resno)
|
|
|
|
{
|
|
|
|
struct resource *res = dev->resource + resno;
|
2011-07-25 20:08:39 +00:00
|
|
|
resource_size_t align, size;
|
2009-04-24 03:49:25 +00:00
|
|
|
int ret;
|
|
|
|
|
2014-02-26 18:25:58 +00:00
|
|
|
res->flags |= IORESOURCE_UNSET;
|
2009-08-28 20:00:06 +00:00
|
|
|
align = pci_resource_alignment(dev, res);
|
2009-04-24 03:49:25 +00:00
|
|
|
if (!align) {
|
2009-11-04 17:32:57 +00:00
|
|
|
dev_info(&dev->dev, "BAR %d: can't assign %pR "
|
2009-10-06 21:33:44 +00:00
|
|
|
"(bogus alignment)\n", resno, res);
|
2009-04-24 03:49:25 +00:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2011-07-25 20:08:39 +00:00
|
|
|
size = resource_size(res);
|
|
|
|
ret = _pci_assign_resource(dev, resno, size, align);
|
2009-04-24 03:49:25 +00:00
|
|
|
|
2011-07-25 20:08:39 +00:00
|
|
|
/*
|
|
|
|
* If we failed to assign anything, let's try the address
|
|
|
|
* where firmware left it. That at least has a chance of
|
|
|
|
* working, which is better than just leaving it disabled.
|
|
|
|
*/
|
2011-11-21 18:54:19 +00:00
|
|
|
if (ret < 0)
|
2011-07-25 20:08:39 +00:00
|
|
|
ret = pci_revert_fw_address(res, dev, resno, size);
|
2009-04-24 03:49:25 +00:00
|
|
|
|
2011-07-25 20:08:39 +00:00
|
|
|
if (!ret) {
|
2014-02-26 18:25:58 +00:00
|
|
|
res->flags &= ~IORESOURCE_UNSET;
|
2011-07-25 20:08:39 +00:00
|
|
|
res->flags &= ~IORESOURCE_STARTALIGN;
|
|
|
|
dev_info(&dev->dev, "BAR %d: assigned %pR\n", resno, res);
|
|
|
|
if (resno < PCI_BRIDGE_RESOURCES)
|
|
|
|
pci_update_resource(dev, resno);
|
|
|
|
}
|
2009-04-24 03:49:25 +00:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-07-11 23:05:43 +00:00
|
|
|
int pci_reassign_resource(struct pci_dev *dev, int resno, resource_size_t addsize,
|
|
|
|
resource_size_t min_align)
|
|
|
|
{
|
|
|
|
struct resource *res = dev->resource + resno;
|
|
|
|
resource_size_t new_size;
|
|
|
|
int ret;
|
|
|
|
|
2014-02-26 18:25:58 +00:00
|
|
|
res->flags |= IORESOURCE_UNSET;
|
2012-07-11 23:05:43 +00:00
|
|
|
if (!res->parent) {
|
|
|
|
dev_info(&dev->dev, "BAR %d: can't reassign an unassigned resource %pR "
|
|
|
|
"\n", resno, res);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* already aligned with min_align */
|
|
|
|
new_size = resource_size(res) + addsize;
|
|
|
|
ret = _pci_assign_resource(dev, resno, new_size, min_align);
|
|
|
|
if (!ret) {
|
2014-02-26 18:25:58 +00:00
|
|
|
res->flags &= ~IORESOURCE_UNSET;
|
2012-07-11 23:05:43 +00:00
|
|
|
res->flags &= ~IORESOURCE_STARTALIGN;
|
|
|
|
dev_info(&dev->dev, "BAR %d: reassigned %pR\n", resno, res);
|
|
|
|
if (resno < PCI_BRIDGE_RESOURCES)
|
|
|
|
pci_update_resource(dev, resno);
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2008-03-04 18:56:47 +00:00
|
|
|
int pci_enable_resources(struct pci_dev *dev, int mask)
|
|
|
|
{
|
|
|
|
u16 cmd, old_cmd;
|
|
|
|
int i;
|
|
|
|
struct resource *r;
|
|
|
|
|
|
|
|
pci_read_config_word(dev, PCI_COMMAND, &cmd);
|
|
|
|
old_cmd = cmd;
|
|
|
|
|
|
|
|
for (i = 0; i < PCI_NUM_RESOURCES; i++) {
|
|
|
|
if (!(mask & (1 << i)))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
r = &dev->resource[i];
|
|
|
|
|
|
|
|
if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
|
|
|
|
continue;
|
|
|
|
if ((i == PCI_ROM_RESOURCE) &&
|
|
|
|
(!(r->flags & IORESOURCE_ROM_ENABLE)))
|
|
|
|
continue;
|
|
|
|
|
2014-02-26 18:26:00 +00:00
|
|
|
if (r->flags & IORESOURCE_UNSET) {
|
|
|
|
dev_err(&dev->dev, "can't enable device: BAR %d %pR not assigned\n",
|
|
|
|
i, r);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2008-03-04 18:56:47 +00:00
|
|
|
if (!r->parent) {
|
2014-02-26 18:26:00 +00:00
|
|
|
dev_err(&dev->dev, "can't enable device: BAR %d %pR not claimed\n",
|
|
|
|
i, r);
|
2008-03-04 18:56:47 +00:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (r->flags & IORESOURCE_IO)
|
|
|
|
cmd |= PCI_COMMAND_IO;
|
|
|
|
if (r->flags & IORESOURCE_MEM)
|
|
|
|
cmd |= PCI_COMMAND_MEMORY;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (cmd != old_cmd) {
|
|
|
|
dev_info(&dev->dev, "enabling device (%04x -> %04x)\n",
|
|
|
|
old_cmd, cmd);
|
|
|
|
pci_write_config_word(dev, PCI_COMMAND, cmd);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|