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Merge tag 'pci-v5.7-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull pci updates from Bjorn Helgaas:
 "Enumeration:

   - Revert sysfs "rescan" renames that broke apps (Kelsey Skunberg)

   - Add more 32 GT/s link speed decoding and improve the implementation
     (Yicong Yang)

  Resource management:

   - Add support for sizing programmable host bridge apertures and fix a
     related alpha Nautilus regression (Ivan Kokshaysky)

  Interrupts:

   - Add boot interrupt quirk mechanism for Xeon chipsets and document
     boot interrupts (Sean V Kelley)

  PCIe native device hotplug:

   - When possible, disable in-band presence detect and use PDS
     (Alexandru Gagniuc)

   - Add DMI table for devices that don't use in-band presence detection
     but don't advertise that correctly (Stuart Hayes)

   - Fix hang when powering slots up/down via sysfs (Lukas Wunner)

   - Fix an MSI interrupt race (Stuart Hayes)

  Virtualization:

   - Add ACS quirks for Zhaoxin devices (Raymond Pang)

  Error handling:

   - Add Error Disconnect Recover (EDR) support so firmware can report
     devices disconnected via DPC and we can try to recover (Kuppuswamy
     Sathyanarayanan)

  Peer-to-peer DMA:

   - Add Intel Sky Lake-E Root Ports B, C, D to the whitelist (Andrew
     Maier)

  ASPM:

   - Reduce severity of common clock config message (Chris Packham)

   - Clear the correct bits when enabling L1 substates, so we don't go
     to the wrong state (Yicong Yang)

  Endpoint framework:

   - Replace EPF linkup ops with notifier call chain and improve locking
     (Kishon Vijay Abraham I)

   - Fix concurrent memory allocation in OB address region (Kishon Vijay
     Abraham I)

   - Move PF function number assignment to EPC core to support multiple
     function creation methods (Kishon Vijay Abraham I)

   - Fix issue with clearing configfs "start" entry (Kunihiko Hayashi)

   - Fix issue with endpoint MSI-X ignoring BAR Indicator and Table
     Offset (Kishon Vijay Abraham I)

   - Add support for testing DMA transfers (Kishon Vijay Abraham I)

   - Add support for testing > 10 endpoint devices (Kishon Vijay Abraham I)

   - Add support for tests to clear IRQ (Kishon Vijay Abraham I)

   - Add common DT schema for endpoint controllers (Kishon Vijay Abraham I)

  Amlogic Meson PCIe controller driver:

   - Add DT bindings for AXG PCIe PHY, shared MIPI/PCIe analog PHY (Remi
     Pommarel)

   - Add Amlogic AXG PCIe PHY, AXG MIPI/PCIe analog PHY drivers (Remi
     Pommarel)

  Cadence PCIe controller driver:

   - Add Root Complex/Endpoint DT schema for Cadence PCIe (Kishon Vijay
     Abraham I)

  Intel VMD host bridge driver:

   - Add two VMD Device IDs that require bus restriction mode (Sushma
     Kalakota)

  Mobiveil PCIe controller driver:

   - Refactor and modularize mobiveil driver (Hou Zhiqiang)

   - Add support for Mobiveil GPEX Gen4 host (Hou Zhiqiang)

  Microsoft Hyper-V host bridge driver:

   - Add support for Hyper-V PCI protocol version 1.3 and
     PCI_BUS_RELATIONS2 (Long Li)

   - Refactor to prepare for virtual PCI on non-x86 architectures (Boqun
     Feng)

   - Fix memory leak in hv_pci_probe()'s error path (Dexuan Cui)

  NVIDIA Tegra PCIe controller driver:

   - Use pci_parse_request_of_pci_ranges() (Rob Herring)

   - Add support for endpoint mode and related DT updates (Vidya Sagar)

   - Reduce -EPROBE_DEFER error message log level (Thierry Reding)

  Qualcomm PCIe controller driver:

   - Restrict class fixup to specific Qualcomm devices (Bjorn Andersson)

  Synopsys DesignWare PCIe controller driver:

   - Refactor core initialization code for endpoint mode (Vidya Sagar)

   - Fix endpoint MSI-X to use correct table address (Kishon Vijay
     Abraham I)

  TI DRA7xx PCIe controller driver:

   - Fix MSI IRQ handling (Vignesh Raghavendra)

  TI Keystone PCIe controller driver:

   - Allow AM654 endpoint to raise MSI-X interrupt (Kishon Vijay Abraham I)

  Miscellaneous:

   - Quirk ASMedia XHCI USB to avoid "PME# from D0" defect (Kai-Heng
     Feng)

   - Use ioremap(), not phys_to_virt(), for platform ROM to fix video
     ROM mapping with CONFIG_HIGHMEM (Mikel Rychliski)"

* tag 'pci-v5.7-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (96 commits)
  misc: pci_endpoint_test: remove duplicate macro PCI_ENDPOINT_TEST_STATUS
  PCI: tegra: Print -EPROBE_DEFER error message at debug level
  misc: pci_endpoint_test: Use full pci-endpoint-test name in request_irq()
  misc: pci_endpoint_test: Fix to support > 10 pci-endpoint-test devices
  tools: PCI: Add 'e' to clear IRQ
  misc: pci_endpoint_test: Add ioctl to clear IRQ
  misc: pci_endpoint_test: Avoid using module parameter to determine irqtype
  PCI: keystone: Allow AM654 PCIe Endpoint to raise MSI-X interrupt
  PCI: dwc: Fix dw_pcie_ep_raise_msix_irq() to get correct MSI-X table address
  PCI: endpoint: Fix ->set_msix() to take BIR and offset as arguments
  misc: pci_endpoint_test: Add support to get DMA option from userspace
  tools: PCI: Add 'd' command line option to support DMA
  misc: pci_endpoint_test: Use streaming DMA APIs for buffer allocation
  PCI: endpoint: functions/pci-epf-test: Print throughput information
  PCI: endpoint: functions/pci-epf-test: Add DMA support to transfer data
  PCI: pciehp: Fix MSI interrupt race
  PCI: pciehp: Fix indefinite wait on sysfs requests
  PCI: endpoint: Fix clearing start entry in configfs
  PCI: tegra: Add support for PCIe endpoint mode in Tegra194
  PCI: sysfs: Revert "rescan" file renames
  ...
This commit is contained in:
Linus Torvalds 2020-04-03 14:25:02 -07:00
commit 86f26a77cb
88 changed files with 4836 additions and 1635 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

155
Documentation/PCI/boot-interrupts.rst Normal file
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@ -0,0 +1,155 @@
.. SPDX-License-Identifier: GPL-2.0
===============
Boot Interrupts
===============
:Author: - Sean V Kelley <sean.v.kelley@linux.intel.com>
Overview
========
On PCI Express, interrupts are represented with either MSI or inbound
interrupt messages (Assert_INTx/Deassert_INTx). The integrated IO-APIC in a
given Core IO converts the legacy interrupt messages from PCI Express to
MSI interrupts. If the IO-APIC is disabled (via the mask bits in the
IO-APIC table entries), the messages are routed to the legacy PCH. This
in-band interrupt mechanism was traditionally necessary for systems that
did not support the IO-APIC and for boot. Intel in the past has used the
term "boot interrupts" to describe this mechanism. Further, the PCI Express
protocol describes this in-band legacy wire-interrupt INTx mechanism for
I/O devices to signal PCI-style level interrupts. The subsequent paragraphs
describe problems with the Core IO handling of INTx message routing to the
PCH and mitigation within BIOS and the OS.
Issue
=====
When in-band legacy INTx messages are forwarded to the PCH, they in turn
trigger a new interrupt for which the OS likely lacks a handler. When an
interrupt goes unhandled over time, they are tracked by the Linux kernel as
Spurious Interrupts. The IRQ will be disabled by the Linux kernel after it
reaches a specific count with the error "nobody cared". This disabled IRQ
now prevents valid usage by an existing interrupt which may happen to share
the IRQ line.
irq 19: nobody cared (try booting with the "irqpoll" option)
CPU: 0 PID: 2988 Comm: irq/34-nipalk Tainted: 4.14.87-rt49-02410-g4a640ec-dirty #1
Hardware name: National Instruments NI PXIe-8880/NI PXIe-8880, BIOS 2.1.5f1 01/09/2020
Call Trace:
<IRQ>
? dump_stack+0x46/0x5e
? __report_bad_irq+0x2e/0xb0
? note_interrupt+0x242/0x290
? nNIKAL100_memoryRead16+0x8/0x10 [nikal]
? handle_irq_event_percpu+0x55/0x70
? handle_irq_event+0x4f/0x80
? handle_fasteoi_irq+0x81/0x180
? handle_irq+0x1c/0x30
? do_IRQ+0x41/0xd0
? common_interrupt+0x84/0x84
</IRQ>
handlers:
irq_default_primary_handler threaded usb_hcd_irq
Disabling IRQ #19
Conditions
==========
The use of threaded interrupts is the most likely condition to trigger
this problem today. Threaded interrupts may not be reenabled after the IRQ
handler wakes. These "one shot" conditions mean that the threaded interrupt
needs to keep the interrupt line masked until the threaded handler has run.
Especially when dealing with high data rate interrupts, the thread needs to
run to completion; otherwise some handlers will end up in stack overflows
since the interrupt of the issuing device is still active.
Affected Chipsets
=================
The legacy interrupt forwarding mechanism exists today in a number of
devices including but not limited to chipsets from AMD/ATI, Broadcom, and
Intel. Changes made through the mitigations below have been applied to
drivers/pci/quirks.c
Starting with ICX there are no longer any IO-APICs in the Core IO's
devices. IO-APIC is only in the PCH. Devices connected to the Core IO's
PCIe Root Ports will use native MSI/MSI-X mechanisms.
Mitigations
===========
The mitigations take the form of PCI quirks. The preference has been to
first identify and make use of a means to disable the routing to the PCH.
In such a case a quirk to disable boot interrupt generation can be
added.[1]
Intel® 6300ESB I/O Controller Hub
Alternate Base Address Register:
BIE: Boot Interrupt Enable
0 = Boot interrupt is enabled.
1 = Boot interrupt is disabled.
Intel® Sandy Bridge through Sky Lake based Xeon servers:
Coherent Interface Protocol Interrupt Control
dis_intx_route2pch/dis_intx_route2ich/dis_intx_route2dmi2:
When this bit is set. Local INTx messages received from the
Intel® Quick Data DMA/PCI Express ports are not routed to legacy
PCH - they are either converted into MSI via the integrated IO-APIC
(if the IO-APIC mask bit is clear in the appropriate entries)
or cause no further action (when mask bit is set)
In the absence of a way to directly disable the routing, another approach
has been to make use of PCI Interrupt pin to INTx routing tables for
purposes of redirecting the interrupt handler to the rerouted interrupt
line by default. Therefore, on chipsets where this INTx routing cannot be
disabled, the Linux kernel will reroute the valid interrupt to its legacy
interrupt. This redirection of the handler will prevent the occurrence of
the spurious interrupt detection which would ordinarily disable the IRQ
line due to excessive unhandled counts.[2]
The config option X86_REROUTE_FOR_BROKEN_BOOT_IRQS exists to enable (or
disable) the redirection of the interrupt handler to the PCH interrupt
line. The option can be overridden by either pci=ioapicreroute or
pci=noioapicreroute.[3]
More Documentation
==================
There is an overview of the legacy interrupt handling in several datasheets
(6300ESB and 6700PXH below). While largely the same, it provides insight
into the evolution of its handling with chipsets.
Example of disabling of the boot interrupt
------------------------------------------
Intel® 6300ESB I/O Controller Hub (Document # 300641-004US)
5.7.3 Boot Interrupt
https://www.intel.com/content/dam/doc/datasheet/6300esb-io-controller-hub-datasheet.pdf
Intel® Xeon® Processor E5-1600/2400/2600/4600 v3 Product Families
Datasheet - Volume 2: Registers (Document # 330784-003)
6.6.41 cipintrc Coherent Interface Protocol Interrupt Control
https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/xeon-e5-v3-datasheet-vol-2.pdf
Example of handler rerouting
----------------------------
Intel® 6700PXH 64-bit PCI Hub (Document # 302628)
2.15.2 PCI Express Legacy INTx Support and Boot Interrupt
https://www.intel.com/content/dam/doc/datasheet/6700pxh-64-bit-pci-hub-datasheet.pdf
If you have any legacy PCI interrupt questions that aren't answered, email me.
Cheers,
Sean V Kelley
sean.v.kelley@linux.intel.com
[1] https://lore.kernel.org/r/12131949181903-git-send-email-sassmann@suse.de/
[2] https://lore.kernel.org/r/12131949182094-git-send-email-sassmann@suse.de/
[3] https://lore.kernel.org/r/487C8EA7.6020205@suse.de/

1
Documentation/PCI/index.rst
View File

@ -16,3 +16,4 @@ Linux PCI Bus Subsystem
pci-error-recovery
pcieaer-howto
endpoint/index
boot-interrupts

23
Documentation/PCI/pcieaer-howto.rst
View File

@ -156,12 +156,6 @@ default reset_link function, but different upstream ports might
have different specifications to reset pci express link, so all
upstream ports should provide their own reset_link functions.
In struct pcie_port_service_driver, a new pointer, reset_link, is
added.
::
pci_ers_result_t (*reset_link) (struct pci_dev *dev);
Section 3.2.2.2 provides more detailed info on when to call
reset_link.
@ -212,15 +206,10 @@ error_detected(dev, pci_channel_io_frozen) to all drivers within
a hierarchy in question. Then, performing link reset at upstream is
necessary. As different kinds of devices might use different approaches
to reset link, AER port service driver is required to provide the
function to reset link. Firstly, kernel looks for if the upstream
component has an aer driver. If it has, kernel uses the reset_link
callback of the aer driver. If the upstream component has no aer driver
and the port is downstream port, we will perform a hot reset as the
default by setting the Secondary Bus Reset bit of the Bridge Control
register associated with the downstream port. As for upstream ports,
they should provide their own aer service drivers with reset_link
function. If error_detected returns PCI_ERS_RESULT_CAN_RECOVER and
reset_link returns PCI_ERS_RESULT_RECOVERED, the error handling goes
function to reset link via callback parameter of pcie_do_recovery()
function. If reset_link is not NULL, recovery function will use it
to reset the link. If error_detected returns PCI_ERS_RESULT_CAN_RECOVER
and reset_link returns PCI_ERS_RESULT_RECOVERED, the error handling goes
to mmio_enabled.
helper functions
@ -243,9 +232,9 @@ messages to root port when an error is detected.
::
int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev);`
int pci_aer_clear_nonfatal_status(struct pci_dev *dev);`
pci_cleanup_aer_uncorrect_error_status cleanups the uncorrectable
pci_aer_clear_nonfatal_status clears non-fatal errors in the uncorrectable
error status register.
Frequent Asked Questions

22
Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt
View File

@ -18,7 +18,6 @@ Required properties:
- reg-names: Must be
- "elbi" External local bus interface registers
- "cfg" Meson specific registers
- "phy" Meson PCIE PHY registers for AXG SoC Family
- "config" PCIe configuration space
- reset-gpios: The GPIO to generate PCIe PERST# assert and deassert signal.
- clocks: Must contain an entry for each entry in clock-names.
@ -26,13 +25,13 @@ Required properties:
- "pclk" PCIe GEN 100M PLL clock
- "port" PCIe_x(A or B) RC clock gate
- "general" PCIe Phy clock
- "mipi" PCIe_x(A or B) 100M ref clock gate for AXG SoC Family
- resets: phandle to the reset lines.
- reset-names: must contain "phy" "port" and "apb"
- "phy" Share PHY reset for AXG SoC Family
- reset-names: must contain "port" and "apb"
- "port" Port A or B reset
- "apb" Share APB reset
- phys: should contain a phandle to the shared phy for G12A SoC Family
- phys: should contain a phandle to the PCIE phy
- phy-names: must contain "pcie"
- device_type:
should be "pci". As specified in designware-pcie.txt
@ -43,9 +42,8 @@ Example configuration:
compatible = "amlogic,axg-pcie", "snps,dw-pcie";
reg = <0x0 0xf9800000 0x0 0x400000
0x0 0xff646000 0x0 0x2000
0x0 0xff644000 0x0 0x2000
0x0 0xf9f00000 0x0 0x100000>;
reg-names = "elbi", "cfg", "phy", "config";
reg-names = "elbi", "cfg", "config";
reset-gpios = <&gpio GPIOX_19 GPIO_ACTIVE_HIGH>;
interrupts = <GIC_SPI 177 IRQ_TYPE_EDGE_RISING>;
#interrupt-cells = <1>;
@ -58,17 +56,15 @@ Example configuration:
ranges = <0x82000000 0 0 0x0 0xf9c00000 0 0x00300000>;
clocks = <&clkc CLKID_USB
&clkc CLKID_MIPI_ENABLE
&clkc CLKID_PCIE_A
&clkc CLKID_PCIE_CML_EN0>;
clock-names = "general",
"mipi",
"pclk",
"port";
resets = <&reset RESET_PCIE_PHY>,
<&reset RESET_PCIE_A>,
resets = <&reset RESET_PCIE_A>,
<&reset RESET_PCIE_APB>;
reset-names = "phy",
"port",
reset-names = "port",
"apb";
phys = <&pcie_phy>;
phy-names = "pcie";
};

27
Documentation/devicetree/bindings/pci/cdns,cdns-pcie-ep.txt
View File

@ -1,27 +0,0 @@
* Cadence PCIe endpoint controller
Required properties:
- compatible: Should contain "cdns,cdns-pcie-ep" to identify the IP used.
- reg: Should contain the controller register base address and AXI interface
region base address respectively.
- reg-names: Must be "reg" and "mem" respectively.
- cdns,max-outbound-regions: Set to maximum number of outbound regions
Optional properties:
- max-functions: Maximum number of functions that can be configured (default 1).
- phys: From PHY bindings: List of Generic PHY phandles. One per lane if more
than one in the list. If only one PHY listed it must manage all lanes.
- phy-names: List of names to identify the PHY.
Example:
pcie@fc000000 {
compatible = "cdns,cdns-pcie-ep";
reg = <0x0 0xfc000000 0x0 0x01000000>,
<0x0 0x80000000 0x0 0x40000000>;
reg-names = "reg", "mem";
cdns,max-outbound-regions = <16>;
max-functions = /bits/ 8 <8>;
phys = <&ep_phy0 &ep_phy1>;
phy-names = "pcie-lane0","pcie-lane1";
};

49
Documentation/devicetree/bindings/pci/cdns,cdns-pcie-ep.yaml Normal file
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@ -0,0 +1,49 @@
# SPDX-License-Identifier: GPL-2.0-only
%YAML 1.2
---
$id: http://devicetree.org/schemas/pci/cdns,cdns-pcie-ep.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Cadence PCIe EP Controller
maintainers:
- Tom Joseph <tjoseph@cadence.com>
allOf:
- $ref: "cdns-pcie.yaml#"
- $ref: "pci-ep.yaml#"
properties:
compatible:
const: cdns,cdns-pcie-ep
reg:
maxItems: 2
reg-names:
items:
- const: reg
- const: mem
required:
- reg
- reg-names
examples:
- |
bus {
#address-cells = <2>;
#size-cells = <2>;
pcie-ep@fc000000 {
compatible = "cdns,cdns-pcie-ep";
reg = <0x0 0xfc000000 0x0 0x01000000>,
<0x0 0x80000000 0x0 0x40000000>;
reg-names = "reg", "mem";
cdns,max-outbound-regions = <16>;
max-functions = /bits/ 8 <8>;
phys = <&pcie_phy0>;
phy-names = "pcie-phy";
};
};
...

66
Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.txt
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@ -1,66 +0,0 @@
* Cadence PCIe host controller
This PCIe controller inherits the base properties defined in
host-generic-pci.txt.
Required properties:
- compatible: Should contain "cdns,cdns-pcie-host" to identify the IP used.
- reg: Should contain the controller register base address, PCIe configuration
window base address, and AXI interface region base address respectively.
- reg-names: Must be "reg", "cfg" and "mem" respectively.
- #address-cells: Set to <3>
- #size-cells: Set to <2>
- device_type: Set to "pci"
- ranges: Ranges for the PCI memory and I/O regions
- #interrupt-cells: Set to <1>
- interrupt-map-mask and interrupt-map: Standard PCI properties to define the
mapping of the PCIe interface to interrupt numbers.
Optional properties:
- cdns,max-outbound-regions: Set to maximum number of outbound regions
(default 32)
- cdns,no-bar-match-nbits: Set into the no BAR match register to configure the
number of least significant bits kept during inbound (PCIe -> AXI) address
translations (default 32)
- vendor-id: The PCI vendor ID (16 bits, default is design dependent)
- device-id: The PCI device ID (16 bits, default is design dependent)
- phys: From PHY bindings: List of Generic PHY phandles. One per lane if more
than one in the list. If only one PHY listed it must manage all lanes.
- phy-names: List of names to identify the PHY.
Example:
pcie@fb000000 {
compatible = "cdns,cdns-pcie-host";
device_type = "pci";
#address-cells = <3>;
#size-cells = <2>;
bus-range = <0x0 0xff>;
linux,pci-domain = <0>;
cdns,max-outbound-regions = <16>;
cdns,no-bar-match-nbits = <32>;
vendor-id = /bits/ 16 <0x17cd>;
device-id = /bits/ 16 <0x0200>;
reg = <0x0 0xfb000000 0x0 0x01000000>,
<0x0 0x41000000 0x0 0x00001000>,
<0x0 0x40000000 0x0 0x04000000>;
reg-names = "reg", "cfg", "mem";
ranges = <0x02000000 0x0 0x42000000 0x0 0x42000000 0x0 0x1000000>,
<0x01000000 0x0 0x43000000 0x0 0x43000000 0x0 0x0010000>;
#interrupt-cells = <0x1>;
interrupt-map = <0x0 0x0 0x0 0x1 &gic 0x0 0x0 0x0 14 0x1
0x0 0x0 0x0 0x2 &gic 0x0 0x0 0x0 15 0x1
0x0 0x0 0x0 0x3 &gic 0x0 0x0 0x0 16 0x1
0x0 0x0 0x0 0x4 &gic 0x0 0x0 0x0 17 0x1>;
interrupt-map-mask = <0x0 0x0 0x0 0x7>;
msi-parent = <&its_pci>;
phys = <&pcie_phy0>;
phy-names = "pcie-phy";
};

76
Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.yaml Normal file
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@ -0,0 +1,76 @@
# SPDX-License-Identifier: GPL-2.0-only
%YAML 1.2
---
$id: http://devicetree.org/schemas/pci/cdns,cdns-pcie-host.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Cadence PCIe host controller
maintainers:
- Tom Joseph <tjoseph@cadence.com>
allOf:
- $ref: /schemas/pci/pci-bus.yaml#
- $ref: "cdns-pcie-host.yaml#"
properties:
compatible:
const: cdns,cdns-pcie-host
reg:
maxItems: 3
reg-names:
items:
- const: reg
- const: cfg
- const: mem
msi-parent: true
required:
- reg
- reg-names
examples:
- |
bus {
#address-cells = <2>;
#size-cells = <2>;
pcie@fb000000 {
compatible = "cdns,cdns-pcie-host";
device_type = "pci";
#address-cells = <3>;
#size-cells = <2>;
bus-range = <0x0 0xff>;
linux,pci-domain = <0>;
cdns,max-outbound-regions = <16>;
cdns,no-bar-match-nbits = <32>;
vendor-id = <0x17cd>;
device-id = <0x0200>;
reg = <0x0 0xfb000000 0x0 0x01000000>,
<0x0 0x41000000 0x0 0x00001000>,
<0x0 0x40000000 0x0 0x04000000>;
reg-names = "reg", "cfg", "mem";
ranges = <0x02000000 0x0 0x42000000 0x0 0x42000000 0x0 0x1000000>,
<0x01000000 0x0 0x43000000 0x0 0x43000000 0x0 0x0010000>;
#interrupt-cells = <0x1>;
interrupt-map = <0x0 0x0 0x0 0x1 &gic 0x0 0x0 0x0 14 0x1>,
<0x0 0x0 0x0 0x2 &gic 0x0 0x0 0x0 15 0x1>,
<0x0 0x0 0x0 0x3 &gic 0x0 0x0 0x0 16 0x1>,
<0x0 0x0 0x0 0x4 &gic 0x0 0x0 0x0 17 0x1>;
interrupt-map-mask = <0x0 0x0 0x0 0x7>;
msi-parent = <&its_pci>;
phys = <&pcie_phy0>;
phy-names = "pcie-phy";
};
};
...

27
Documentation/devicetree/bindings/pci/cdns-pcie-host.yaml Normal file
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@ -0,0 +1,27 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: "http://devicetree.org/schemas/pci/cdns-pcie-host.yaml#"
$schema: "http://devicetree.org/meta-schemas/core.yaml#"
title: Cadence PCIe Host
maintainers:
- Tom Joseph <tjoseph@cadence.com>
allOf:
- $ref: "/schemas/pci/pci-bus.yaml#"
- $ref: "cdns-pcie.yaml#"
properties:
cdns,no-bar-match-nbits:
description:
Set into the no BAR match register to configure the number of least
significant bits kept during inbound (PCIe -> AXI) address translations
allOf:
- $ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 64
default: 32
msi-parent: true

31
Documentation/devicetree/bindings/pci/cdns-pcie.yaml Normal file
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@ -0,0 +1,31 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: "http://devicetree.org/schemas/pci/cdns-pcie.yaml#"
$schema: "http://devicetree.org/meta-schemas/core.yaml#"
title: Cadence PCIe Core
maintainers:
- Tom Joseph <tjoseph@cadence.com>
properties:
cdns,max-outbound-regions:
description: maximum number of outbound regions
allOf:
- $ref: /schemas/types.yaml#/definitions/uint32
minimum: 1
maximum: 32
default: 32
phys:
description:
One per lane if more than one in the list. If only one PHY listed it must
manage all lanes.
minItems: 1
maxItems: 16
phy-names:
items:
- const: pcie-phy
# FIXME: names when more than 1

52
Documentation/devicetree/bindings/pci/layerscape-pcie-gen4.txt Normal file
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@ -0,0 +1,52 @@
NXP Layerscape PCIe Gen4 controller
This PCIe controller is based on the Mobiveil PCIe IP and thus inherits all
the common properties defined in mobiveil-pcie.txt.
Required properties:
- compatible: should contain the platform identifier such as:
"fsl,lx2160a-pcie"
- reg: base addresses and lengths of the PCIe controller register blocks.
"csr_axi_slave": Bridge config registers
"config_axi_slave": PCIe controller registers
- interrupts: A list of interrupt outputs of the controller. Must contain an
entry for each entry in the interrupt-names property.
- interrupt-names: It could include the following entries:
"intr": The interrupt that is asserted for controller interrupts
"aer": Asserted for aer interrupt when chip support the aer interrupt with
none MSI/MSI-X/INTx mode,but there is interrupt line for aer.
"pme": Asserted for pme interrupt when chip support the pme interrupt with
none MSI/MSI-X/INTx mode,but there is interrupt line for pme.
- dma-coherent: Indicates that the hardware IP block can ensure the coherency
of the data transferred from/to the IP block. This can avoid the software
cache flush/invalid actions, and improve the performance significantly.
- msi-parent : See the generic MSI binding described in
Documentation/devicetree/bindings/interrupt-controller/msi.txt.
Example:
pcie@3400000 {
compatible = "fsl,lx2160a-pcie";
reg = <0x00 0x03400000 0x0 0x00100000 /* controller registers */
0x80 0x00000000 0x0 0x00001000>; /* configuration space */
reg-names = "csr_axi_slave", "config_axi_slave";
interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* AER interrupt */
<GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>, /* PME interrupt */
<GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
interrupt-names = "aer", "pme", "intr";
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
apio-wins = <8>;
ppio-wins = <8>;
dma-coherent;
bus-range = <0x0 0xff>;
msi-parent = <&its>;
ranges = <0x82000000 0x0 0x40000000 0x80 0x40000000 0x0 0x40000000>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 7>;
interrupt-map = <0000 0 0 1 &gic 0 0 GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>,
<0000 0 0 2 &gic 0 0 GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>,
<0000 0 0 3 &gic 0 0 GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>,
<0000 0 0 4 &gic 0 0 GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH>;
};

125
Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt
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@ -1,11 +1,11 @@
NVIDIA Tegra PCIe controller (Synopsys DesignWare Core based)
This PCIe host controller is based on the Synopsis Designware PCIe IP
This PCIe controller is based on the Synopsis Designware PCIe IP
and thus inherits all the common properties defined in designware-pcie.txt.
Some of the controller instances are dual mode where in they can work either
in root port mode or endpoint mode but one at a time.
Required properties:
- compatible: For Tegra19x, must contain "nvidia,tegra194-pcie".
- device_type: Must be "pci"
- power-domains: A phandle to the node that controls power to the respective
PCIe controller and a specifier name for the PCIe controller. Following are
the specifiers for the different PCIe controllers
@ -32,6 +32,32 @@ Required properties:
entry for each entry in the interrupt-names property.
- interrupt-names: Must include the following entries:
"intr": The Tegra interrupt that is asserted for controller interrupts
- clocks: Must contain an entry for each entry in clock-names.
See ../clocks/clock-bindings.txt for details.
- clock-names: Must include the following entries:
- core
- resets: Must contain an entry for each entry in reset-names.
See ../reset/reset.txt for details.
- reset-names: Must include the following entries:
- apb
- core
- phys: Must contain a phandle to P2U PHY for each entry in phy-names.
- phy-names: Must include an entry for each active lane.
"p2u-N": where N ranges from 0 to one less than the total number of lanes
- nvidia,bpmp: Must contain a pair of phandle to BPMP controller node followed
by controller-id. Following are the controller ids for each controller.
0: C0
1: C1
2: C2
3: C3
4: C4
5: C5
- vddio-pex-ctl-supply: Regulator supply for PCIe side band signals
RC mode:
- compatible: Tegra19x must contain "nvidia,tegra194-pcie"
- device_type: Must be "pci" for RC mode
- interrupt-names: Must include the following entries:
"msi": The Tegra interrupt that is asserted when an MSI is received
- bus-range: Range of bus numbers associated with this controller
- #address-cells: Address representation for root ports (must be 3)
@ -60,27 +86,15 @@ Required properties:
- interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties
Please refer to the standard PCI bus binding document for a more detailed
explanation.
- clocks: Must contain an entry for each entry in clock-names.
See ../clocks/clock-bindings.txt for details.
- clock-names: Must include the following entries:
- core
- resets: Must contain an entry for each entry in reset-names.
See ../reset/reset.txt for details.
- reset-names: Must include the following entries:
- apb
- core
- phys: Must contain a phandle to P2U PHY for each entry in phy-names.
- phy-names: Must include an entry for each active lane.
"p2u-N": where N ranges from 0 to one less than the total number of lanes
- nvidia,bpmp: Must contain a pair of phandle to BPMP controller node followed
by controller-id. Following are the controller ids for each controller.
0: C0
1: C1
2: C2
3: C3
4: C4
5: C5
- vddio-pex-ctl-supply: Regulator supply for PCIe side band signals
EP mode:
In Tegra194, Only controllers C0, C4 & C5 support EP mode.
- compatible: Tegra19x must contain "nvidia,tegra194-pcie-ep"
- reg-names: Must include the following entries:
"addr_space": Used to map remote RC address space
- reset-gpios: Must contain a phandle to a GPIO controller followed by
GPIO that is being used as PERST input signal. Please refer to pci.txt
document.
Optional properties:
- pinctrl-names: A list of pinctrl state names.
@ -104,6 +118,8 @@ Optional properties:
specified in microseconds
- nvidia,aspm-l0s-entrance-latency-us: ASPM L0s entrance latency to be
specified in microseconds
RC mode:
- vpcie3v3-supply: A phandle to the regulator node that supplies 3.3V to the slot
if the platform has one such slot. (Ex:- x16 slot owned by C5 controller
in p2972-0000 platform).
@ -111,11 +127,18 @@ Optional properties:
if the platform has one such slot. (Ex:- x16 slot owned by C5 controller
in p2972-0000 platform).
EP mode:
- nvidia,refclk-select-gpios: Must contain a phandle to a GPIO controller
followed by GPIO that is being used to enable REFCLK to controller from host
NOTE:- On Tegra194's P2972-0000 platform, only C5 controller can be enabled to
operate in the endpoint mode because of the way the platform is designed.
Examples:
=========
Tegra194:
--------
Tegra194 RC mode:
-----------------
pcie@14180000 {
compatible = "nvidia,tegra194-pcie", "snps,dw-pcie";
@ -169,3 +192,53 @@ Tegra194:
<&p2u_hsio_5>;
phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3";
};
Tegra194 EP mode:
-----------------
pcie_ep@141a0000 {
compatible = "nvidia,tegra194-pcie-ep", "snps,dw-pcie-ep";
power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX8A>;
reg = <0x00 0x141a0000 0x0 0x00020000 /* appl registers (128K) */
0x00 0x3a040000 0x0 0x00040000 /* iATU_DMA reg space (256K) */
0x00 0x3a080000 0x0 0x00040000 /* DBI reg space (256K) */
0x1c 0x00000000 0x4 0x00000000>; /* Address Space (16G) */
reg-names = "appl", "atu_dma", "dbi", "addr_space";
num-lanes = <8>;
num-ib-windows = <2>;
num-ob-windows = <8>;
pinctrl-names = "default";
pinctrl-0 = <&clkreq_c5_bi_dir_state>;
clocks = <&bpmp TEGRA194_CLK_PEX1_CORE_5>;
clock-names = "core";
resets = <&bpmp TEGRA194_RESET_PEX1_CORE_5_APB>,
<&bpmp TEGRA194_RESET_PEX1_CORE_5>;
reset-names = "apb", "core";
interrupts = <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
interrupt-names = "intr";
nvidia,bpmp = <&bpmp 5>;
nvidia,aspm-cmrt-us = <60>;
nvidia,aspm-pwr-on-t-us = <20>;
nvidia,aspm-l0s-entrance-latency-us = <3>;
vddio-pex-ctl-supply = <&vdd_1v8ao>;
reset-gpios = <&gpio TEGRA194_MAIN_GPIO(GG, 1) GPIO_ACTIVE_LOW>;
nvidia,refclk-select-gpios = <&gpio_aon TEGRA194_AON_GPIO(AA, 5)
GPIO_ACTIVE_HIGH>;
phys = <&p2u_nvhs_0>, <&p2u_nvhs_1>, <&p2u_nvhs_2>,
<&p2u_nvhs_3>, <&p2u_nvhs_4>, <&p2u_nvhs_5>,
<&p2u_nvhs_6>, <&p2u_nvhs_7>;
phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3", "p2u-4",
"p2u-5", "p2u-6", "p2u-7";
};

41
Documentation/devicetree/bindings/pci/pci-ep.yaml Normal file
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@ -0,0 +1,41 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pci/pci-ep.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: PCI Endpoint Controller Schema
description: |
Common properties for PCI Endpoint Controller Nodes.
maintainers:
- Kishon Vijay Abraham I <kishon@ti.com>
properties:
$nodename:
pattern: "^pcie-ep@"
max-functions:
description: Maximum number of functions that can be configured
allOf:
- $ref: /schemas/types.yaml#/definitions/uint8
minimum: 1
default: 1
maximum: 255
max-link-speed:
allOf:
- $ref: /schemas/types.yaml#/definitions/uint32
enum: [ 1, 2, 3, 4 ]
num-lanes:
description: maximum number of lanes
allOf:
- $ref: /schemas/types.yaml#/definitions/uint32
minimum: 1
default: 1
maximum: 16
required:
- compatible

35
Documentation/devicetree/bindings/phy/amlogic,meson-axg-mipi-pcie-analog.yaml Normal file
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@ -0,0 +1,35 @@
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: "http://devicetree.org/schemas/phy/amlogic,meson-axg-mipi-pcie-analog.yaml#"
$schema: "http://devicetree.org/meta-schemas/core.yaml#"
title: Amlogic AXG shared MIPI/PCIE analog PHY
maintainers:
- Remi Pommarel <repk@triplefau.lt>
properties:
compatible:
const: amlogic,axg-mipi-pcie-analog-phy
reg:
maxItems: 1
"#phy-cells":
const: 1
required:
- compatible
- reg
- "#phy-cells"
additionalProperties: false
examples:
- |
mpphy: phy@0 {
compatible = "amlogic,axg-mipi-pcie-analog-phy";
reg = <0x0 0x0 0x0 0xc>;
#phy-cells = <1>;
};

52
Documentation/devicetree/bindings/phy/amlogic,meson-axg-pcie.yaml Normal file
View File

@ -0,0 +1,52 @@
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: "http://devicetree.org/schemas/phy/amlogic,meson-axg-pcie.yaml#"
$schema: "http://devicetree.org/meta-schemas/core.yaml#"
title: Amlogic AXG PCIE PHY
maintainers:
- Remi Pommarel <repk@triplefau.lt>
properties:
compatible:
const: amlogic,axg-pcie-phy
reg:
maxItems: 1
resets:
maxItems: 1
phys:
maxItems: 1
phy-names:
const: analog
"#phy-cells":
const: 0
required:
- compatible
- reg
- phys
- phy-names
- resets
- "#phy-cells"
additionalProperties: false
examples:
- |
#include <dt-bindings/reset/amlogic,meson-axg-reset.h>
#include <dt-bindings/phy/phy.h>
pcie_phy: pcie-phy@ff644000 {
compatible = "amlogic,axg-pcie-phy";
reg = <0x0 0xff644000 0x0 0x1c>;
resets = <&reset RESET_PCIE_PHY>;
phys = <&mipi_analog_phy PHY_TYPE_PCIE>;
phy-names = "analog";
#phy-cells = <0>;
};

12
MAINTAINERS
View File

@ -12857,7 +12857,7 @@ PCI DRIVER FOR CADENCE PCIE IP
M: Tom Joseph <tjoseph@cadence.com>
L: linux-pci@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/pci/cdns,*.txt
F: Documentation/devicetree/bindings/pci/cdns,*
F: drivers/pci/controller/cadence/
PCI DRIVER FOR FREESCALE LAYERSCAPE
@ -12870,6 +12870,14 @@ L: linux-arm-kernel@lists.infradead.org
S: Maintained
F: drivers/pci/controller/dwc/*layerscape*
PCI DRIVER FOR NXP LAYERSCAPE GEN4 CONTROLLER
M: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
L: linux-pci@vger.kernel.org
L: linux-arm-kernel@lists.infradead.org
S: Maintained
F: Documentation/devicetree/bindings/pci/layerscape-pcie-gen4.txt
F: drivers/pci/controller/mobibeil/pcie-layerscape-gen4.c
PCI DRIVER FOR GENERIC OF HOSTS
M: Will Deacon <will@kernel.org>
L: linux-pci@vger.kernel.org
@ -12912,7 +12920,7 @@ M: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
L: linux-pci@vger.kernel.org
S: Supported
F: Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
F: drivers/pci/controller/pcie-mobiveil.c
F: drivers/pci/controller/mobiveil/pcie-mobiveil*
PCI DRIVER FOR MVEBU (Marvell Armada 370 and Armada XP SOC support)
M: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

52
arch/alpha/kernel/sys_nautilus.c
View File

@ -187,10 +187,6 @@ nautilus_machine_check(unsigned long vector, unsigned long la_ptr)
extern void pcibios_claim_one_bus(struct pci_bus *);
static struct resource irongate_io = {
.name = "Irongate PCI IO",
.flags = IORESOURCE_IO,
};
static struct resource irongate_mem = {
.name = "Irongate PCI MEM",
.flags = IORESOURCE_MEM,
@ -208,17 +204,19 @@ nautilus_init_pci(void)
struct pci_controller *hose = hose_head;
struct pci_host_bridge *bridge;
struct pci_bus *bus;
struct pci_dev *irongate;
unsigned long bus_align, bus_size, pci_mem;
unsigned long memtop = max_low_pfn << PAGE_SHIFT;
int ret;
bridge = pci_alloc_host_bridge(0);
if (!bridge)
return;
/* Use default IO. */
pci_add_resource(&bridge->windows, &ioport_resource);
pci_add_resource(&bridge->windows, &iomem_resource);
/* Irongate PCI memory aperture, calculate requred size before
setting it up. */
pci_add_resource(&bridge->windows, &irongate_mem);
pci_add_resource(&bridge->windows, &busn_resource);
bridge->dev.parent = NULL;
bridge->sysdata = hose;
@ -226,59 +224,49 @@ nautilus_init_pci(void)
bridge->ops = alpha_mv.pci_ops;
bridge->swizzle_irq = alpha_mv.pci_swizzle;
bridge->map_irq = alpha_mv.pci_map_irq;
bridge->size_windows = 1;
/* Scan our single hose. */
ret = pci_scan_root_bus_bridge(bridge);
if (ret) {
if (pci_scan_root_bus_bridge(bridge)) {
pci_free_host_bridge(bridge);
return;
}
bus = hose->bus = bridge->bus;
pcibios_claim_one_bus(bus);
irongate = pci_get_domain_bus_and_slot(pci_domain_nr(bus), 0, 0);
bus->self = irongate;
bus->resource[0] = &irongate_io;
bus->resource[1] = &irongate_mem;
pci_bus_size_bridges(bus);
/* IO port range. */
bus->resource[0]->start = 0;
bus->resource[0]->end = 0xffff;
/* Set up PCI memory range - limit is hardwired to 0xffffffff,
base must be at aligned to 16Mb. */
bus_align = bus->resource[1]->start;
bus_size = bus->resource[1]->end + 1 - bus_align;
/* Now we've got the size and alignment of PCI memory resources
stored in irongate_mem. Set up the PCI memory range: limit is
hardwired to 0xffffffff, base must be aligned to 16Mb. */
bus_align = irongate_mem.start;
bus_size = irongate_mem.end + 1 - bus_align;
if (bus_align < 0x1000000UL)
bus_align = 0x1000000UL;
pci_mem = (0x100000000UL - bus_size) & -bus_align;
irongate_mem.start = pci_mem;
irongate_mem.end = 0xffffffffUL;
bus->resource[1]->start = pci_mem;
bus->resource[1]->end = 0xffffffffUL;
if (request_resource(&iomem_resource, bus->resource[1]) < 0)
/* Register our newly calculated PCI memory window in the resource
tree. */
if (request_resource(&iomem_resource, &irongate_mem) < 0)
printk(KERN_ERR "Failed to request MEM on hose 0\n");
printk(KERN_INFO "Irongate pci_mem %pR\n", &irongate_mem);
if (pci_mem < memtop)
memtop = pci_mem;
if (memtop > alpha_mv.min_mem_address) {
free_reserved_area(__va(alpha_mv.min_mem_address),
__va(memtop), -1, NULL);
printk("nautilus_init_pci: %ldk freed\n",
printk(KERN_INFO "nautilus_init_pci: %ldk freed\n",
(memtop - alpha_mv.min_mem_address) >> 10);
}
if ((IRONGATE0->dev_vendor >> 16) > 0x7006) /* Albacore? */
IRONGATE0->pci_mem = pci_mem;
pci_bus_assign_resources(bus);
/* pci_common_swizzle() relies on bus->self being NULL
for the root bus, so just clear it. */
bus->self = NULL;
pci_bus_add_devices(bus);
}

41
arch/x86/include/asm/hyperv-tlfs.h
View File

@ -376,6 +376,7 @@ struct hv_tsc_emulation_status {
#define HVCALL_SEND_IPI_EX 0x0015
#define HVCALL_POST_MESSAGE 0x005c
#define HVCALL_SIGNAL_EVENT 0x005d
#define HVCALL_RETARGET_INTERRUPT 0x007e
#define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE 0x00af
#define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_LIST 0x00b0
@ -405,6 +406,8 @@ enum HV_GENERIC_SET_FORMAT {
HV_GENERIC_SET_ALL,
};
#define HV_PARTITION_ID_SELF ((u64)-1)
#define HV_HYPERCALL_RESULT_MASK GENMASK_ULL(15, 0)
#define HV_HYPERCALL_FAST_BIT BIT(16)
#define HV_HYPERCALL_VARHEAD_OFFSET 17
@ -909,4 +912,42 @@ struct hv_tlb_flush_ex {
struct hv_partition_assist_pg {
u32 tlb_lock_count;
};
union hv_msi_entry {
u64 as_uint64;
struct {
u32 address;
u32 data;
} __packed;
};
struct hv_interrupt_entry {
u32 source; /* 1 for MSI(-X) */
u32 reserved1;
union hv_msi_entry msi_entry;
} __packed;
/*
* flags for hv_device_interrupt_target.flags
*/
#define HV_DEVICE_INTERRUPT_TARGET_MULTICAST 1
#define HV_DEVICE_INTERRUPT_TARGET_PROCESSOR_SET 2
struct hv_device_interrupt_target {
u32 vector;
u32 flags;
union {
u64 vp_mask;
struct hv_vpset vp_set;
};
} __packed;
/* HvRetargetDeviceInterrupt hypercall */
struct hv_retarget_device_interrupt {
u64 partition_id; /* use "self" */
u64 device_id;
struct hv_interrupt_entry int_entry;
u64 reserved2;
struct hv_device_interrupt_target int_target;
} __packed __aligned(8);
#endif

8
arch/x86/include/asm/mshyperv.h
View File

@ -4,6 +4,7 @@
#include <linux/types.h>
#include <linux/nmi.h>
#include <linux/msi.h>
#include <asm/io.h>
#include <asm/hyperv-tlfs.h>
#include <asm/nospec-branch.h>
@ -242,6 +243,13 @@ bool hv_vcpu_is_preempted(int vcpu);
static inline void hv_apic_init(void) {}
#endif
static inline void hv_set_msi_entry_from_desc(union hv_msi_entry *msi_entry,
struct msi_desc *msi_desc)
{
msi_entry->address = msi_desc->msg.address_lo;
msi_entry->data = msi_desc->msg.data;
}
#else /* CONFIG_HYPERV */
static inline void hyperv_init(void) {}
static inline void hyperv_setup_mmu_ops(void) {}

15
drivers/acpi/pci_root.c
View File

@ -131,6 +131,7 @@ static struct pci_osc_bit_struct pci_osc_support_bit[] = {
{ OSC_PCI_CLOCK_PM_SUPPORT, "ClockPM" },
{ OSC_PCI_SEGMENT_GROUPS_SUPPORT, "Segments" },
{ OSC_PCI_MSI_SUPPORT, "MSI" },
{ OSC_PCI_EDR_SUPPORT, "EDR" },
{ OSC_PCI_HPX_TYPE_3_SUPPORT, "HPX-Type3" },
};
@ -141,6 +142,7 @@ static struct pci_osc_bit_struct pci_osc_control_bit[] = {
{ OSC_PCI_EXPRESS_AER_CONTROL, "AER" },
{ OSC_PCI_EXPRESS_CAPABILITY_CONTROL, "PCIeCapability" },
{ OSC_PCI_EXPRESS_LTR_CONTROL, "LTR" },
{ OSC_PCI_EXPRESS_DPC_CONTROL, "DPC" },
};
static void decode_osc_bits(struct acpi_pci_root *root, char *msg, u32 word,
@ -440,6 +442,8 @@ static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm,
support |= OSC_PCI_ASPM_SUPPORT | OSC_PCI_CLOCK_PM_SUPPORT;
if (pci_msi_enabled())
support |= OSC_PCI_MSI_SUPPORT;
if (IS_ENABLED(CONFIG_PCIE_EDR))
support |= OSC_PCI_EDR_SUPPORT;
decode_osc_support(root, "OS supports", support);
status = acpi_pci_osc_support(root, support);
@ -487,6 +491,15 @@ static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm,
control |= OSC_PCI_EXPRESS_AER_CONTROL;
}
/*
* Per the Downstream Port Containment Related Enhancements ECN to
* the PCI Firmware Spec, r3.2, sec 4.5.1, table 4-5,
* OSC_PCI_EXPRESS_DPC_CONTROL indicates the OS supports both DPC
* and EDR.
*/
if (IS_ENABLED(CONFIG_PCIE_DPC) && IS_ENABLED(CONFIG_PCIE_EDR))
control |= OSC_PCI_EXPRESS_DPC_CONTROL;
requested = control;
status = acpi_pci_osc_control_set(handle, &control,
OSC_PCI_EXPRESS_CAPABILITY_CONTROL);
@ -916,6 +929,8 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
host_bridge->native_pme = 0;
if (!(root->osc_control_set & OSC_PCI_EXPRESS_LTR_CONTROL))
host_bridge->native_ltr = 0;
if (!(root->osc_control_set & OSC_PCI_EXPRESS_DPC_CONTROL))
host_bridge->native_dpc = 0;
/*
* Evaluate the "PCI Boot Configuration" _DSM Function. If it

35
drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
View File

@ -192,30 +192,35 @@ static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
{
uint8_t __iomem *bios;
size_t size;
phys_addr_t rom = adev->pdev->rom;
size_t romlen = adev->pdev->romlen;
void __iomem *bios;
adev->bios = NULL;
bios = pci_platform_rom(adev->pdev, &size);
if (!bios) {
return false;
}
adev->bios = kzalloc(size, GFP_KERNEL);
if (adev->bios == NULL)
if (!rom || romlen == 0)
return false;
memcpy_fromio(adev->bios, bios, size);
if (!check_atom_bios(adev->bios, size)) {
kfree(adev->bios);
adev->bios = kzalloc(romlen, GFP_KERNEL);
if (!adev->bios)
return false;
}
adev->bios_size = size;
bios = ioremap(rom, romlen);
if (!bios)
goto free_bios;
memcpy_fromio(adev->bios, bios, romlen);
iounmap(bios);
if (!check_atom_bios(adev->bios, romlen))
goto free_bios;
adev->bios_size = romlen;
return true;
free_bios:
kfree(adev->bios);
return false;
}
#ifdef CONFIG_ACPI

17
drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowpci.c
View File

@ -101,9 +101,13 @@ platform_init(struct nvkm_bios *bios, const char *name)
else
return ERR_PTR(-ENODEV);
if (!pdev->rom || pdev->romlen == 0)
return ERR_PTR(-ENODEV);
if ((priv = kmalloc(sizeof(*priv), GFP_KERNEL))) {
priv->size = pdev->romlen;
if (ret = -ENODEV,
(priv->rom = pci_platform_rom(pdev, &priv->size)))
(priv->rom = ioremap(pdev->rom, pdev->romlen)))
return priv;
kfree(priv);
}
@ -111,11 +115,20 @@ platform_init(struct nvkm_bios *bios, const char *name)
return ERR_PTR(ret);
}
static void
platform_fini(void *data)
{
struct priv *priv = data;
iounmap(priv->rom);
kfree(priv);
}
const struct nvbios_source
nvbios_platform = {
.name = "PLATFORM",
.init = platform_init,
.fini = (void(*)(void *))kfree,
.fini = platform_fini,
.read = pcirom_read,
.rw = true,
};

30
drivers/gpu/drm/radeon/radeon_bios.c
View File

@ -108,25 +108,33 @@ static bool radeon_read_bios(struct radeon_device *rdev)
static bool radeon_read_platform_bios(struct radeon_device *rdev)
{
uint8_t __iomem *bios;
size_t size;
phys_addr_t rom = rdev->pdev->rom;
size_t romlen = rdev->pdev->romlen;
void __iomem *bios;
rdev->bios = NULL;
bios = pci_platform_rom(rdev->pdev, &size);
if (!bios) {
if (!rom || romlen == 0)
return false;
}
if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) {
rdev->bios = kzalloc(romlen, GFP_KERNEL);
if (!rdev->bios)
return false;
}
rdev->bios = kmemdup(bios, size, GFP_KERNEL);
if (rdev->bios == NULL) {
return false;
}
bios = ioremap(rom, romlen);
if (!bios)
goto free_bios;
memcpy_fromio(rdev->bios, bios, romlen);
iounmap(bios);
if (rdev->bios[0] != 0x55 || rdev->bios[1] != 0xaa)
goto free_bios;
return true;
free_bios:
kfree(rdev->bios);
return false;
}
#ifdef CONFIG_ACPI

213
drivers/misc/pci_endpoint_test.c
View File

@ -17,6 +17,7 @@
#include <linux/mutex.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
@ -64,6 +65,9 @@
#define PCI_ENDPOINT_TEST_IRQ_TYPE 0x24
#define PCI_ENDPOINT_TEST_IRQ_NUMBER 0x28
#define PCI_ENDPOINT_TEST_FLAGS 0x2c
#define FLAG_USE_DMA BIT(0)
#define PCI_DEVICE_ID_TI_AM654 0xb00c
#define is_am654_pci_dev(pdev) \
@ -98,11 +102,13 @@ struct pci_endpoint_test {
struct completion irq_raised;
int last_irq;
int num_irqs;
int irq_type;
/* mutex to protect the ioctls */
struct mutex mutex;
struct miscdevice miscdev;
enum pci_barno test_reg_bar;
size_t alignment;
const char *name;
};
struct pci_endpoint_test_data {
@ -157,6 +163,7 @@ static void pci_endpoint_test_free_irq_vectors(struct pci_endpoint_test *test)
struct pci_dev *pdev = test->pdev;
pci_free_irq_vectors(pdev);
test->irq_type = IRQ_TYPE_UNDEFINED;
}
static bool pci_endpoint_test_alloc_irq_vectors(struct pci_endpoint_test *test,
@ -191,6 +198,8 @@ static bool pci_endpoint_test_alloc_irq_vectors(struct pci_endpoint_test *test,
irq = 0;
res = false;
}
test->irq_type = type;
test->num_irqs = irq;
return res;
@ -218,7 +227,7 @@ static bool pci_endpoint_test_request_irq(struct pci_endpoint_test *test)
for (i = 0; i < test->num_irqs; i++) {
err = devm_request_irq(dev, pci_irq_vector(pdev, i),
pci_endpoint_test_irqhandler,
IRQF_SHARED, DRV_MODULE_NAME, test);
IRQF_SHARED, test->name, test);
if (err)
goto fail;
}
@ -315,11 +324,16 @@ static bool pci_endpoint_test_msi_irq(struct pci_endpoint_test *test,
return false;
}
static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
static bool pci_endpoint_test_copy(struct pci_endpoint_test *test,
unsigned long arg)
{
struct pci_endpoint_test_xfer_param param;
bool ret = false;
void *src_addr;
void *dst_addr;
u32 flags = 0;
bool use_dma;
size_t size;
dma_addr_t src_phys_addr;
dma_addr_t dst_phys_addr;
struct pci_dev *pdev = test->pdev;
@ -330,25 +344,46 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
dma_addr_t orig_dst_phys_addr;
size_t offset;
size_t alignment = test->alignment;
int irq_type = test->irq_type;
u32 src_crc32;
u32 dst_crc32;
int err;
err = copy_from_user(&param, (void __user *)arg, sizeof(param));
if (err) {
dev_err(dev, "Failed to get transfer param\n");
return false;
}
size = param.size;
if (size > SIZE_MAX - alignment)
goto err;
use_dma = !!(param.flags & PCITEST_FLAGS_USE_DMA);
if (use_dma)
flags |= FLAG_USE_DMA;
if (irq_type < IRQ_TYPE_LEGACY || irq_type > IRQ_TYPE_MSIX) {
dev_err(dev, "Invalid IRQ type option\n");
goto err;
}
orig_src_addr = dma_alloc_coherent(dev, size + alignment,
&orig_src_phys_addr, GFP_KERNEL);
orig_src_addr = kzalloc(size + alignment, GFP_KERNEL);
if (!orig_src_addr) {
dev_err(dev, "Failed to allocate source buffer\n");
ret = false;
goto err;
}
get_random_bytes(orig_src_addr, size + alignment);
orig_src_phys_addr = dma_map_single(dev, orig_src_addr,
size + alignment, DMA_TO_DEVICE);
if (dma_mapping_error(dev, orig_src_phys_addr)) {
dev_err(dev, "failed to map source buffer address\n");
ret = false;
goto err_src_phys_addr;
}
if (alignment && !IS_ALIGNED(orig_src_phys_addr, alignment)) {
src_phys_addr = PTR_ALIGN(orig_src_phys_addr, alignment);
offset = src_phys_addr - orig_src_phys_addr;
@ -364,15 +399,21 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_UPPER_SRC_ADDR,
upper_32_bits(src_phys_addr));
get_random_bytes(src_addr, size);
src_crc32 = crc32_le(~0, src_addr, size);
orig_dst_addr = dma_alloc_coherent(dev, size + alignment,
&orig_dst_phys_addr, GFP_KERNEL);
orig_dst_addr = kzalloc(size + alignment, GFP_KERNEL);
if (!orig_dst_addr) {
dev_err(dev, "Failed to allocate destination address\n");
ret = false;
goto err_orig_src_addr;
goto err_dst_addr;
}
orig_dst_phys_addr = dma_map_single(dev, orig_dst_addr,
size + alignment, DMA_FROM_DEVICE);
if (dma_mapping_error(dev, orig_dst_phys_addr)) {
dev_err(dev, "failed to map destination buffer address\n");
ret = false;
goto err_dst_phys_addr;
}
if (alignment && !IS_ALIGNED(orig_dst_phys_addr, alignment)) {
@ -392,6 +433,7 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_SIZE,
size);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_FLAGS, flags);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_TYPE, irq_type);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_NUMBER, 1);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_COMMAND,
@ -399,24 +441,34 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
wait_for_completion(&test->irq_raised);
dma_unmap_single(dev, orig_dst_phys_addr, size + alignment,
DMA_FROM_DEVICE);
dst_crc32 = crc32_le(~0, dst_addr, size);
if (dst_crc32 == src_crc32)
ret = true;
dma_free_coherent(dev, size + alignment, orig_dst_addr,
orig_dst_phys_addr);
err_dst_phys_addr:
kfree(orig_dst_addr);
err_orig_src_addr:
dma_free_coherent(dev, size + alignment, orig_src_addr,
orig_src_phys_addr);
err_dst_addr:
dma_unmap_single(dev, orig_src_phys_addr, size + alignment,
DMA_TO_DEVICE);
err_src_phys_addr:
kfree(orig_src_addr);
err:
return ret;
}
static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size)
static bool pci_endpoint_test_write(struct pci_endpoint_test *test,
unsigned long arg)
{
struct pci_endpoint_test_xfer_param param;
bool ret = false;
u32 flags = 0;
bool use_dma;
u32 reg;
void *addr;
dma_addr_t phys_addr;
@ -426,24 +478,47 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size)
dma_addr_t orig_phys_addr;
size_t offset;
size_t alignment = test->alignment;
int irq_type = test->irq_type;
size_t size;
u32 crc32;
int err;
err = copy_from_user(&param, (void __user *)arg, sizeof(param));
if (err != 0) {
dev_err(dev, "Failed to get transfer param\n");
return false;
}
size = param.size;
if (size > SIZE_MAX - alignment)
goto err;
use_dma = !!(param.flags & PCITEST_FLAGS_USE_DMA);
if (use_dma)
flags |= FLAG_USE_DMA;
if (irq_type < IRQ_TYPE_LEGACY || irq_type > IRQ_TYPE_MSIX) {
dev_err(dev, "Invalid IRQ type option\n");
goto err;
}
orig_addr = dma_alloc_coherent(dev, size + alignment, &orig_phys_addr,
GFP_KERNEL);
orig_addr = kzalloc(size + alignment, GFP_KERNEL);
if (!orig_addr) {
dev_err(dev, "Failed to allocate address\n");
ret = false;
goto err;
}
get_random_bytes(orig_addr, size + alignment);
orig_phys_addr = dma_map_single(dev, orig_addr, size + alignment,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, orig_phys_addr)) {
dev_err(dev, "failed to map source buffer address\n");
ret = false;
goto err_phys_addr;
}
if (alignment && !IS_ALIGNED(orig_phys_addr, alignment)) {
phys_addr = PTR_ALIGN(orig_phys_addr, alignment);
offset = phys_addr - orig_phys_addr;
@ -453,8 +528,6 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size)
addr = orig_addr;
}
get_random_bytes(addr, size);
crc32 = crc32_le(~0, addr, size);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_CHECKSUM,
crc32);
@ -466,6 +539,7 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size)
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_SIZE, size);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_FLAGS, flags);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_TYPE, irq_type);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_NUMBER, 1);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_COMMAND,
@ -477,15 +551,24 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size)
if (reg & STATUS_READ_SUCCESS)
ret = true;
dma_free_coherent(dev, size + alignment, orig_addr, orig_phys_addr);
dma_unmap_single(dev, orig_phys_addr, size + alignment,
DMA_TO_DEVICE);
err_phys_addr:
kfree(orig_addr);
err:
return ret;
}
static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size)
static bool pci_endpoint_test_read(struct pci_endpoint_test *test,
unsigned long arg)
{
struct pci_endpoint_test_xfer_param param;
bool ret = false;
u32 flags = 0;
bool use_dma;
size_t size;
void *addr;
dma_addr_t phys_addr;
struct pci_dev *pdev = test->pdev;
@ -494,24 +577,44 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size)
dma_addr_t orig_phys_addr;
size_t offset;
size_t alignment = test->alignment;
int irq_type = test->irq_type;
u32 crc32;
int err;
err = copy_from_user(&param, (void __user *)arg, sizeof(param));
if (err) {
dev_err(dev, "Failed to get transfer param\n");
return false;
}
size = param.size;
if (size > SIZE_MAX - alignment)
goto err;
use_dma = !!(param.flags & PCITEST_FLAGS_USE_DMA);
if (use_dma)
flags |= FLAG_USE_DMA;
if (irq_type < IRQ_TYPE_LEGACY || irq_type > IRQ_TYPE_MSIX) {
dev_err(dev, "Invalid IRQ type option\n");
goto err;
}
orig_addr = dma_alloc_coherent(dev, size + alignment, &orig_phys_addr,
GFP_KERNEL);
orig_addr = kzalloc(size + alignment, GFP_KERNEL);
if (!orig_addr) {
dev_err(dev, "Failed to allocate destination address\n");
ret = false;
goto err;
}
orig_phys_addr = dma_map_single(dev, orig_addr, size + alignment,
DMA_FROM_DEVICE);
if (dma_mapping_error(dev, orig_phys_addr)) {
dev_err(dev, "failed to map source buffer address\n");
ret = false;
goto err_phys_addr;
}
if (alignment && !IS_ALIGNED(orig_phys_addr, alignment)) {
phys_addr = PTR_ALIGN(orig_phys_addr, alignment);
offset = phys_addr - orig_phys_addr;
@ -528,6 +631,7 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size)
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_SIZE, size);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_FLAGS, flags);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_TYPE, irq_type);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_NUMBER, 1);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_COMMAND,
@ -535,15 +639,26 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size)
wait_for_completion(&test->irq_raised);
dma_unmap_single(dev, orig_phys_addr, size + alignment,
DMA_FROM_DEVICE);
crc32 = crc32_le(~0, addr, size);
if (crc32 == pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_CHECKSUM))
ret = true;
dma_free_coherent(dev, size + alignment, orig_addr, orig_phys_addr);
err_phys_addr:
kfree(orig_addr);
err:
return ret;
}
static bool pci_endpoint_test_clear_irq(struct pci_endpoint_test *test)
{
pci_endpoint_test_release_irq(test);
pci_endpoint_test_free_irq_vectors(test);
return true;
}
static bool pci_endpoint_test_set_irq(struct pci_endpoint_test *test,
int req_irq_type)
{
@ -555,7 +670,7 @@ static bool pci_endpoint_test_set_irq(struct pci_endpoint_test *test,
return false;
}
if (irq_type == req_irq_type)
if (test->irq_type == req_irq_type)
return true;
pci_endpoint_test_release_irq(test);
@ -567,12 +682,10 @@ static bool pci_endpoint_test_set_irq(struct pci_endpoint_test *test,
if (!pci_endpoint_test_request_irq(test))
goto err;
irq_type = req_irq_type;
return true;
err:
pci_endpoint_test_free_irq_vectors(test);
irq_type = IRQ_TYPE_UNDEFINED;
return false;
}
@ -616,6 +729,9 @@ static long pci_endpoint_test_ioctl(struct file *file, unsigned int cmd,
case PCITEST_GET_IRQTYPE:
ret = irq_type;
break;
case PCITEST_CLEAR_IRQ:
ret = pci_endpoint_test_clear_irq(test);
break;
}
ret:
@ -633,7 +749,7 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
{
int err;
int id;
char name[20];
char name[24];
enum pci_barno bar;
void __iomem *base;
struct device *dev = &pdev->dev;
@ -652,6 +768,7 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
test->test_reg_bar = 0;
test->alignment = 0;
test->pdev = pdev;
test->irq_type = IRQ_TYPE_UNDEFINED;
if (no_msi)
irq_type = IRQ_TYPE_LEGACY;
@ -667,6 +784,12 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
init_completion(&test->irq_raised);
mutex_init(&test->mutex);
if ((dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48)) != 0) &&
dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)) != 0) {
dev_err(dev, "Cannot set DMA mask\n");
return -EINVAL;
}
err = pci_enable_device(pdev);
if (err) {
dev_err(dev, "Cannot enable PCI device\n");
@ -684,9 +807,6 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
if (!pci_endpoint_test_alloc_irq_vectors(test, irq_type))
goto err_disable_irq;
if (!pci_endpoint_test_request_irq(test))
goto err_disable_irq;
for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) {
base = pci_ioremap_bar(pdev, bar);
@ -716,12 +836,21 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
}
snprintf(name, sizeof(name), DRV_MODULE_NAME ".%d", id);
test->name = kstrdup(name, GFP_KERNEL);
if (!test->name) {
err = -ENOMEM;
goto err_ida_remove;
}
if (!pci_endpoint_test_request_irq(test))
goto err_kfree_test_name;
misc_device = &test->miscdev;
misc_device->minor = MISC_DYNAMIC_MINOR;
misc_device->name = kstrdup(name, GFP_KERNEL);
if (!misc_device->name) {
err = -ENOMEM;
goto err_ida_remove;
goto err_release_irq;
}
misc_device->fops = &pci_endpoint_test_fops,
@ -736,6 +865,12 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
err_kfree_name:
kfree(misc_device->name);
err_release_irq:
pci_endpoint_test_release_irq(test);
err_kfree_test_name:
kfree(test->name);
err_ida_remove:
ida_simple_remove(&pci_endpoint_test_ida, id);
@ -744,7 +879,6 @@ err_iounmap:
if (test->bar[bar])
pci_iounmap(pdev, test->bar[bar]);
}
pci_endpoint_test_release_irq(test);
err_disable_irq:
pci_endpoint_test_free_irq_vectors(test);
@ -770,6 +904,7 @@ static void pci_endpoint_test_remove(struct pci_dev *pdev)
misc_deregister(&test->miscdev);
kfree(misc_device->name);
kfree(test->name);
ida_simple_remove(&pci_endpoint_test_ida, id);
for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
if (test->bar[bar])
@ -783,6 +918,12 @@ static void pci_endpoint_test_remove(struct pci_dev *pdev)
pci_disable_device(pdev);
}
static const struct pci_endpoint_test_data default_data = {
.test_reg_bar = BAR_0,
.alignment = SZ_4K,
.irq_type = IRQ_TYPE_MSI,
};
static const struct pci_endpoint_test_data am654_data = {
.test_reg_bar = BAR_2,
.alignment = SZ_64K,
@ -790,8 +931,12 @@ static const struct pci_endpoint_test_data am654_data = {
};
static const struct pci_device_id pci_endpoint_test_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA74x) },
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA72x) },
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA74x),
.driver_data = (kernel_ulong_t)&default_data,
},
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA72x),
.driver_data = (kernel_ulong_t)&default_data,
},
{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, 0x81c0) },
{ PCI_DEVICE_DATA(SYNOPSYS, EDDA, NULL) },
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_AM654),

4
drivers/net/ethernet/intel/ice/ice_main.c
View File

@ -3508,9 +3508,9 @@ static pci_ers_result_t ice_pci_err_slot_reset(struct pci_dev *pdev)
result = PCI_ERS_RESULT_DISCONNECT;
}
err = pci_cleanup_aer_uncorrect_error_status(pdev);
err = pci_aer_clear_nonfatal_status(pdev);
if (err)
dev_dbg(&pdev->dev, "pci_cleanup_aer_uncorrect_error_status failed, error %d\n",
dev_dbg(&pdev->dev, "pci_aer_clear_nonfatal_status() failed, error %d\n",
err);
/* non-fatal, continue */

4
drivers/ntb/hw/idt/ntb_hw_idt.c
View File

@ -2674,8 +2674,8 @@ static int idt_init_pci(struct idt_ntb_dev *ndev)
ret = pci_enable_pcie_error_reporting(pdev);
if (ret != 0)
dev_warn(&pdev->dev, "PCIe AER capability disabled\n");
else /* Cleanup uncorrectable error status before getting to init */
pci_cleanup_aer_uncorrect_error_status(pdev);
else /* Cleanup nonfatal error status before getting to init */
pci_aer_clear_nonfatal_status(pdev);
/* First enable the PCI device */
ret = pcim_enable_device(pdev);

11
drivers/pci/controller/Kconfig
View File

@ -213,16 +213,6 @@ config PCIE_MEDIATEK
Say Y here if you want to enable PCIe controller support on
MediaTek SoCs.
config PCIE_MOBIVEIL
bool "Mobiveil AXI PCIe controller"
depends on ARCH_ZYNQMP || COMPILE_TEST
depends on OF
depends on PCI_MSI_IRQ_DOMAIN
help
Say Y here if you want to enable support for the Mobiveil AXI PCIe
Soft IP. It has up to 8 outbound and inbound windows
for address translation and it is a PCIe Gen4 IP.
config PCIE_TANGO_SMP8759
bool "Tango SMP8759 PCIe controller (DANGEROUS)"
depends on ARCH_TANGO && PCI_MSI && OF
@ -269,5 +259,6 @@ config PCI_HYPERV_INTERFACE
have a common interface with the Hyper-V PCI frontend driver.
source "drivers/pci/controller/dwc/Kconfig"
source "drivers/pci/controller/mobiveil/Kconfig"
source "drivers/pci/controller/cadence/Kconfig"
endmenu

2
drivers/pci/controller/Makefile
View File

@ -25,12 +25,12 @@ obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o
obj-$(CONFIG_PCIE_ROCKCHIP_EP) += pcie-rockchip-ep.o
obj-$(CONFIG_PCIE_ROCKCHIP_HOST) += pcie-rockchip-host.o
obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o
obj-$(CONFIG_VMD) += vmd.o
obj-$(CONFIG_PCIE_BRCMSTB) += pcie-brcmstb.o
# pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
obj-y += dwc/
obj-y += mobiveil/
# The following drivers are for devices that use the generic ACPI

29
drivers/pci/controller/dwc/Kconfig
View File

@ -248,14 +248,37 @@ config PCI_MESON
implement the driver.
config PCIE_TEGRA194
tristate "NVIDIA Tegra194 (and later) PCIe controller"
tristate
config PCIE_TEGRA194_HOST
tristate "NVIDIA Tegra194 (and later) PCIe controller - Host Mode"
depends on ARCH_TEGRA_194_SOC || COMPILE_TEST
depends on PCI_MSI_IRQ_DOMAIN
select PCIE_DW_HOST
select PHY_TEGRA194_P2U
select PCIE_TEGRA194
help
Say Y here if you want support for DesignWare core based PCIe host
controller found in NVIDIA Tegra194 SoC.
Enables support for the PCIe controller in the NVIDIA Tegra194 SoC to
work in host mode. There are two instances of PCIe controllers in
Tegra194. This controller can work either as EP or RC. In order to
enable host-specific features PCIE_TEGRA194_HOST must be selected and
in order to enable device-specific features PCIE_TEGRA194_EP must be
selected. This uses the DesignWare core.
config PCIE_TEGRA194_EP
tristate "NVIDIA Tegra194 (and later) PCIe controller - Endpoint Mode"
depends on ARCH_TEGRA_194_SOC || COMPILE_TEST
depends on PCI_ENDPOINT
select PCIE_DW_EP
select PHY_TEGRA194_P2U
select PCIE_TEGRA194
help
Enables support for the PCIe controller in the NVIDIA Tegra194 SoC to
work in host mode. There are two instances of PCIe controllers in
Tegra194. This controller can work either as EP or RC. In order to
enable host-specific features PCIE_TEGRA194_HOST must be selected and
in order to enable device-specific features PCIE_TEGRA194_EP must be
selected. This uses the DesignWare core.
config PCIE_UNIPHIER
bool "Socionext UniPhier PCIe controllers"

233
drivers/pci/controller/dwc/pci-dra7xx.c
View File

@ -215,10 +215,6 @@ static int dra7xx_pcie_host_init(struct pcie_port *pp)
return 0;
}
static const struct dw_pcie_host_ops dra7xx_pcie_host_ops = {
.host_init = dra7xx_pcie_host_init,
};
static int dra7xx_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
irq_hw_number_t hwirq)
{
@ -233,43 +229,77 @@ static const struct irq_domain_ops intx_domain_ops = {
.xlate = pci_irqd_intx_xlate,
};
static int dra7xx_pcie_init_irq_domain(struct pcie_port *pp)
static int dra7xx_pcie_handle_msi(struct pcie_port *pp, int index)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct device *dev = pci->dev;
struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pci);
struct device_node *node = dev->of_node;
struct device_node *pcie_intc_node = of_get_next_child(node, NULL);
unsigned long val;
int pos, irq;
if (!pcie_intc_node) {
dev_err(dev, "No PCIe Intc node found\n");
return -ENODEV;
val = dw_pcie_readl_dbi(pci, PCIE_MSI_INTR0_STATUS +
(index * MSI_REG_CTRL_BLOCK_SIZE));
if (!val)
return 0;
pos = find_next_bit(&val, MAX_MSI_IRQS_PER_CTRL, 0);
while (pos != MAX_MSI_IRQS_PER_CTRL) {
irq = irq_find_mapping(pp->irq_domain,
(index * MAX_MSI_IRQS_PER_CTRL) + pos);
generic_handle_irq(irq);
pos++;
pos = find_next_bit(&val, MAX_MSI_IRQS_PER_CTRL, pos);
}
dra7xx->irq_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,
&intx_domain_ops, pp);
of_node_put(pcie_intc_node);
if (!dra7xx->irq_domain) {
dev_err(dev, "Failed to get a INTx IRQ domain\n");
return -ENODEV;
}
return 0;
return 1;
}
static irqreturn_t dra7xx_pcie_msi_irq_handler(int irq, void *arg)
static void dra7xx_pcie_handle_msi_irq(struct pcie_port *pp)
{
struct dra7xx_pcie *dra7xx = arg;
struct dw_pcie *pci = dra7xx->pci;
struct pcie_port *pp = &pci->pp;
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
int ret, i, count, num_ctrls;
num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
/**
* Need to make sure all MSI status bits read 0 before exiting.
* Else, new MSI IRQs are not registered by the wrapper. Have an
* upperbound for the loop and exit the IRQ in case of IRQ flood
* to avoid locking up system in interrupt context.
*/
count = 0;
do {
ret = 0;
for (i = 0; i < num_ctrls; i++)
ret |= dra7xx_pcie_handle_msi(pp, i);
count++;
} while (ret && count <= 1000);
if (count > 1000)
dev_warn_ratelimited(pci->dev,
"Too many MSI IRQs to handle\n");
}
static void dra7xx_pcie_msi_irq_handler(struct irq_desc *desc)
{
struct irq_chip *chip = irq_desc_get_chip(desc);
struct dra7xx_pcie *dra7xx;
struct dw_pcie *pci;
struct pcie_port *pp;
unsigned long reg;
u32 virq, bit;
chained_irq_enter(chip, desc);
pp = irq_desc_get_handler_data(desc);
pci = to_dw_pcie_from_pp(pp);
dra7xx = to_dra7xx_pcie(pci);
reg = dra7xx_pcie_readl(dra7xx, PCIECTRL_DRA7XX_CONF_IRQSTATUS_MSI);
dra7xx_pcie_writel(dra7xx, PCIECTRL_DRA7XX_CONF_IRQSTATUS_MSI, reg);
switch (reg) {
case MSI:
dw_handle_msi_irq(pp);
dra7xx_pcie_handle_msi_irq(pp);
break;
case INTA:
case INTB:
@ -283,9 +313,7 @@ static irqreturn_t dra7xx_pcie_msi_irq_handler(int irq, void *arg)
break;
}
dra7xx_pcie_writel(dra7xx, PCIECTRL_DRA7XX_CONF_IRQSTATUS_MSI, reg);
return IRQ_HANDLED;
chained_irq_exit(chip, desc);
}
static irqreturn_t dra7xx_pcie_irq_handler(int irq, void *arg)
@ -347,6 +375,145 @@ static irqreturn_t dra7xx_pcie_irq_handler(int irq, void *arg)
return IRQ_HANDLED;
}
static int dra7xx_pcie_init_irq_domain(struct pcie_port *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct device *dev = pci->dev;
struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pci);
struct device_node *node = dev->of_node;
struct device_node *pcie_intc_node = of_get_next_child(node, NULL);
if (!pcie_intc_node) {
dev_err(dev, "No PCIe Intc node found\n");
return -ENODEV;
}
irq_set_chained_handler_and_data(pp->irq, dra7xx_pcie_msi_irq_handler,
pp);
dra7xx->irq_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,
&intx_domain_ops, pp);
of_node_put(pcie_intc_node);
if (!dra7xx->irq_domain) {
dev_err(dev, "Failed to get a INTx IRQ domain\n");
return -ENODEV;
}
return 0;
}
static void dra7xx_pcie_setup_msi_msg(struct irq_data *d, struct msi_msg *msg)
{
struct pcie_port *pp = irq_data_get_irq_chip_data(d);
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
u64 msi_target;
msi_target = (u64)pp->msi_data;
msg->address_lo = lower_32_bits(msi_target);
msg->address_hi = upper_32_bits(msi_target);
msg->data = d->hwirq;
dev_dbg(pci->dev, "msi#%d address_hi %#x address_lo %#x\n",
(int)d->hwirq, msg->address_hi, msg->address_lo);
}
static int dra7xx_pcie_msi_set_affinity(struct irq_data *d,
const struct cpumask *mask,
bool force)
{
return -EINVAL;
}
static void dra7xx_pcie_bottom_mask(struct irq_data *d)
{
struct pcie_port *pp = irq_data_get_irq_chip_data(d);
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
unsigned int res, bit, ctrl;
unsigned long flags;
raw_spin_lock_irqsave(&pp->lock, flags);
ctrl = d->hwirq / MAX_MSI_IRQS_PER_CTRL;
res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
pp->irq_mask[ctrl] |= BIT(bit);
dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK + res,
pp->irq_mask[ctrl]);
raw_spin_unlock_irqrestore(&pp->lock, flags);
}
static void dra7xx_pcie_bottom_unmask(struct irq_data *d)
{
struct pcie_port *pp = irq_data_get_irq_chip_data(d);
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
unsigned int res, bit, ctrl;
unsigned long flags;
raw_spin_lock_irqsave(&pp->lock, flags);
ctrl = d->hwirq / MAX_MSI_IRQS_PER_CTRL;
res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
pp->irq_mask[ctrl] &= ~BIT(bit);
dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK + res,
pp->irq_mask[ctrl]);
raw_spin_unlock_irqrestore(&pp->lock, flags);
}
static void dra7xx_pcie_bottom_ack(struct irq_data *d)
{
struct pcie_port *pp = irq_data_get_irq_chip_data(d);
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
unsigned int res, bit, ctrl;
ctrl = d->hwirq / MAX_MSI_IRQS_PER_CTRL;
res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_STATUS + res, BIT(bit));
}
static struct irq_chip dra7xx_pci_msi_bottom_irq_chip = {
.name = "DRA7XX-PCI-MSI",
.irq_ack = dra7xx_pcie_bottom_ack,
.irq_compose_msi_msg = dra7xx_pcie_setup_msi_msg,
.irq_set_affinity = dra7xx_pcie_msi_set_affinity,
.irq_mask = dra7xx_pcie_bottom_mask,
.irq_unmask = dra7xx_pcie_bottom_unmask,
};
static int dra7xx_pcie_msi_host_init(struct pcie_port *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
u32 ctrl, num_ctrls;
pp->msi_irq_chip = &dra7xx_pci_msi_bottom_irq_chip;
num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
/* Initialize IRQ Status array */
for (ctrl = 0; ctrl < num_ctrls; ctrl++) {
pp->irq_mask[ctrl] = ~0;
dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK +
(ctrl * MSI_REG_CTRL_BLOCK_SIZE),
pp->irq_mask[ctrl]);
dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_ENABLE +
(ctrl * MSI_REG_CTRL_BLOCK_SIZE),
~0);
}
return dw_pcie_allocate_domains(pp);
}
static const struct dw_pcie_host_ops dra7xx_pcie_host_ops = {
.host_init = dra7xx_pcie_host_init,
.msi_host_init = dra7xx_pcie_msi_host_init,
};
static void dra7xx_pcie_ep_init(struct dw_pcie_ep *ep)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
@ -467,14 +634,6 @@ static int __init dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx,
return pp->irq;
}
ret = devm_request_irq(dev, pp->irq, dra7xx_pcie_msi_irq_handler,
IRQF_SHARED | IRQF_NO_THREAD,
"dra7-pcie-msi", dra7xx);
if (ret) {
dev_err(dev, "failed to request irq\n");
return ret;
}
ret = dra7xx_pcie_init_irq_domain(pp);
if (ret < 0)
return ret;

5
drivers/pci/controller/dwc/pci-keystone.c
View File

@ -959,6 +959,9 @@ static int ks_pcie_am654_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
case PCI_EPC_IRQ_MSI:
dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num);
break;
case PCI_EPC_IRQ_MSIX:
dw_pcie_ep_raise_msix_irq(ep, func_no, interrupt_num);
break;
default:
dev_err(pci->dev, "UNKNOWN IRQ type\n");
return -EINVAL;
@ -970,7 +973,7 @@ static int ks_pcie_am654_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
static const struct pci_epc_features ks_pcie_am654_epc_features = {
.linkup_notifier = false,
.msi_capable = true,
.msix_capable = false,
.msix_capable = true,
.reserved_bar = 1 << BAR_0 | 1 << BAR_1,
.bar_fixed_64bit = 1 << BAR_0,
.bar_fixed_size[2] = SZ_1M,

116
drivers/pci/controller/dwc/pci-meson.c
View File

@ -66,7 +66,6 @@
#define PORT_CLK_RATE 100000000UL
#define MAX_PAYLOAD_SIZE 256
#define MAX_READ_REQ_SIZE 256
#define MESON_PCIE_PHY_POWERUP 0x1c
#define PCIE_RESET_DELAY 500
#define PCIE_SHARED_RESET 1
#define PCIE_NORMAL_RESET 0
@ -81,26 +80,19 @@ enum pcie_data_rate {
struct meson_pcie_mem_res {
void __iomem *elbi_base;
void __iomem *cfg_base;
void __iomem *phy_base;
};
struct meson_pcie_clk_res {
struct clk *clk;
struct clk *mipi_gate;
struct clk *port_clk;
struct clk *general_clk;
};
struct meson_pcie_rc_reset {
struct reset_control *phy;
struct reset_control *port;
struct reset_control *apb;
};
struct meson_pcie_param {
bool has_shared_phy;
};
struct meson_pcie {
struct dw_pcie pci;
struct meson_pcie_mem_res mem_res;
@ -108,7 +100,6 @@ struct meson_pcie {
struct meson_pcie_rc_reset mrst;
struct gpio_desc *reset_gpio;
struct phy *phy;
const struct meson_pcie_param *param;
};
static struct reset_control *meson_pcie_get_reset(struct meson_pcie *mp,
@ -130,13 +121,6 @@ static int meson_pcie_get_resets(struct meson_pcie *mp)
{
struct meson_pcie_rc_reset *mrst = &mp->mrst;
if (!mp->param->has_shared_phy) {
mrst->phy = meson_pcie_get_reset(mp, "phy", PCIE_SHARED_RESET);
if (IS_ERR(mrst->phy))
return PTR_ERR(mrst->phy);
reset_control_deassert(mrst->phy);
}
mrst->port = meson_pcie_get_reset(mp, "port", PCIE_NORMAL_RESET);
if (IS_ERR(mrst->port))
return PTR_ERR(mrst->port);
@ -162,22 +146,6 @@ static void __iomem *meson_pcie_get_mem(struct platform_device *pdev,
return devm_ioremap_resource(dev, res);
}
static void __iomem *meson_pcie_get_mem_shared(struct platform_device *pdev,
struct meson_pcie *mp,
const char *id)
{
struct device *dev = mp->pci.dev;
struct resource *res;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, id);
if (!res) {
dev_err(dev, "No REG resource %s\n", id);
return ERR_PTR(-ENXIO);
}
return devm_ioremap(dev, res->start, resource_size(res));
}
static int meson_pcie_get_mems(struct platform_device *pdev,
struct meson_pcie *mp)
{
@ -189,14 +157,6 @@ static int meson_pcie_get_mems(struct platform_device *pdev,
if (IS_ERR(mp->mem_res.cfg_base))
return PTR_ERR(mp->mem_res.cfg_base);
/* Meson AXG SoC has two PCI controllers use same phy register */
if (!mp->param->has_shared_phy) {
mp->mem_res.phy_base =
meson_pcie_get_mem_shared(pdev, mp, "phy");
if (IS_ERR(mp->mem_res.phy_base))
return PTR_ERR(mp->mem_res.phy_base);
}
return 0;
}
@ -204,37 +164,33 @@ static int meson_pcie_power_on(struct meson_pcie *mp)
{
int ret = 0;
if (mp->param->has_shared_phy) {
ret = phy_init(mp->phy);
if (ret)
return ret;
ret = phy_init(mp->phy);
if (ret)
return ret;
ret = phy_power_on(mp->phy);
if (ret) {
phy_exit(mp->phy);
return ret;
}
} else
writel(MESON_PCIE_PHY_POWERUP, mp->mem_res.phy_base);
ret = phy_power_on(mp->phy);
if (ret) {
phy_exit(mp->phy);
return ret;
}
return 0;
}
static void meson_pcie_power_off(struct meson_pcie *mp)
{
phy_power_off(mp->phy);
phy_exit(mp->phy);
}
static int meson_pcie_reset(struct meson_pcie *mp)
{
struct meson_pcie_rc_reset *mrst = &mp->mrst;
int ret = 0;
if (mp->param->has_shared_phy) {
ret = phy_reset(mp->phy);
if (ret)
return ret;
} else {
reset_control_assert(mrst->phy);
udelay(PCIE_RESET_DELAY);
reset_control_deassert(mrst->phy);
udelay(PCIE_RESET_DELAY);
}
ret = phy_reset(mp->phy);
if (ret)
return ret;
reset_control_assert(mrst->port);
reset_control_assert(mrst->apb);
@ -286,12 +242,6 @@ static int meson_pcie_probe_clocks(struct meson_pcie *mp)
if (IS_ERR(res->port_clk))
return PTR_ERR(res->port_clk);
if (!mp->param->has_shared_phy) {
res->mipi_gate = meson_pcie_probe_clock(dev, "mipi", 0);
if (IS_ERR(res->mipi_gate))
return PTR_ERR(res->mipi_gate);
}
res->general_clk = meson_pcie_probe_clock(dev, "general", 0);
if (IS_ERR(res->general_clk))
return PTR_ERR(res->general_clk);
@ -562,7 +512,6 @@ static const struct dw_pcie_ops dw_pcie_ops = {
static int meson_pcie_probe(struct platform_device *pdev)
{
const struct meson_pcie_param *match_data;
struct device *dev = &pdev->dev;
struct dw_pcie *pci;
struct meson_pcie *mp;
@ -576,17 +525,10 @@ static int meson_pcie_probe(struct platform_device *pdev)
pci->dev = dev;
pci->ops = &dw_pcie_ops;
match_data = of_device_get_match_data(dev);
if (!match_data) {
dev_err(dev, "failed to get match data\n");
return -ENODEV;
}
mp->param = match_data;
if (mp->param->has_shared_phy) {
mp->phy = devm_phy_get(dev, "pcie");
if (IS_ERR(mp->phy))
return PTR_ERR(mp->phy);
mp->phy = devm_phy_get(dev, "pcie");
if (IS_ERR(mp->phy)) {
dev_err(dev, "get phy failed, %ld\n", PTR_ERR(mp->phy));
return PTR_ERR(mp->phy);
}
mp->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
@ -636,30 +578,16 @@ static int meson_pcie_probe(struct platform_device *pdev)
return 0;
err_phy:
if (mp->param->has_shared_phy) {
phy_power_off(mp->phy);
phy_exit(mp->phy);
}
meson_pcie_power_off(mp);
return ret;
}
static struct meson_pcie_param meson_pcie_axg_param = {
.has_shared_phy = false,
};
static struct meson_pcie_param meson_pcie_g12a_param = {
.has_shared_phy = true,
};
static const struct of_device_id meson_pcie_of_match[] = {
{
.compatible = "amlogic,axg-pcie",
.data = &meson_pcie_axg_param,
},
{
.compatible = "amlogic,g12a-pcie",
.data = &meson_pcie_g12a_param,
},
{},
};

144
drivers/pci/controller/dwc/pcie-designware-ep.c
View File

@ -18,6 +18,15 @@ void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
pci_epc_linkup(epc);
}
EXPORT_SYMBOL_GPL(dw_pcie_ep_linkup);
void dw_pcie_ep_init_notify(struct dw_pcie_ep *ep)
{
struct pci_epc *epc = ep->epc;
pci_epc_init_notify(epc);
}
EXPORT_SYMBOL_GPL(dw_pcie_ep_init_notify);
static void __dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar,
int flags)
@ -125,6 +134,7 @@ static void dw_pcie_ep_clear_bar(struct pci_epc *epc, u8 func_no,
dw_pcie_disable_atu(pci, atu_index, DW_PCIE_REGION_INBOUND);
clear_bit(atu_index, ep->ib_window_map);
ep->epf_bar[bar] = NULL;
}
static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no,
@ -158,6 +168,7 @@ static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no,
dw_pcie_writel_dbi(pci, reg + 4, 0);
}
ep->epf_bar[bar] = epf_bar;
dw_pcie_dbi_ro_wr_dis(pci);
return 0;
@ -269,7 +280,8 @@ static int dw_pcie_ep_get_msix(struct pci_epc *epc, u8 func_no)
return val;
}
static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts)
static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts,
enum pci_barno bir, u32 offset)
{
struct dw_pcie_ep *ep = epc_get_drvdata(epc);
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
@ -278,12 +290,22 @@ static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts)
if (!ep->msix_cap)
return -EINVAL;
dw_pcie_dbi_ro_wr_en(pci);
reg = ep->msix_cap + PCI_MSIX_FLAGS;
val = dw_pcie_readw_dbi(pci, reg);
val &= ~PCI_MSIX_FLAGS_QSIZE;
val |= interrupts;
dw_pcie_dbi_ro_wr_en(pci);
dw_pcie_writew_dbi(pci, reg, val);
reg = ep->msix_cap + PCI_MSIX_TABLE;
val = offset | bir;
dw_pcie_writel_dbi(pci, reg, val);
reg = ep->msix_cap + PCI_MSIX_PBA;
val = (offset + (interrupts * PCI_MSIX_ENTRY_SIZE)) | bir;
dw_pcie_writel_dbi(pci, reg, val);
dw_pcie_dbi_ro_wr_dis(pci);
return 0;
@ -409,55 +431,41 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
u16 interrupt_num)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
struct pci_epf_msix_tbl *msix_tbl;
struct pci_epc *epc = ep->epc;
u16 tbl_offset, bir;
u32 bar_addr_upper, bar_addr_lower;
u32 msg_addr_upper, msg_addr_lower;
struct pci_epf_bar *epf_bar;
u32 reg, msg_data, vec_ctrl;
u64 tbl_addr, msg_addr, reg_u64;
void __iomem *msix_tbl;
unsigned int aligned_offset;
u32 tbl_offset;
u64 msg_addr;
int ret;
u8 bir;
reg = ep->msix_cap + PCI_MSIX_TABLE;
tbl_offset = dw_pcie_readl_dbi(pci, reg);
bir = (tbl_offset & PCI_MSIX_TABLE_BIR);
tbl_offset &= PCI_MSIX_TABLE_OFFSET;
reg = PCI_BASE_ADDRESS_0 + (4 * bir);
bar_addr_upper = 0;
bar_addr_lower = dw_pcie_readl_dbi(pci, reg);
reg_u64 = (bar_addr_lower & PCI_BASE_ADDRESS_MEM_TYPE_MASK);
if (reg_u64 == PCI_BASE_ADDRESS_MEM_TYPE_64)
bar_addr_upper = dw_pcie_readl_dbi(pci, reg + 4);
epf_bar = ep->epf_bar[bir];
msix_tbl = epf_bar->addr;
msix_tbl = (struct pci_epf_msix_tbl *)((char *)msix_tbl + tbl_offset);
tbl_addr = ((u64) bar_addr_upper) << 32 | bar_addr_lower;
tbl_addr += (tbl_offset + ((interrupt_num - 1) * PCI_MSIX_ENTRY_SIZE));
tbl_addr &= PCI_BASE_ADDRESS_MEM_MASK;
msix_tbl = ioremap(ep->phys_base + tbl_addr,
PCI_MSIX_ENTRY_SIZE);
if (!msix_tbl)
return -EINVAL;
msg_addr_lower = readl(msix_tbl + PCI_MSIX_ENTRY_LOWER_ADDR);
msg_addr_upper = readl(msix_tbl + PCI_MSIX_ENTRY_UPPER_ADDR);
msg_addr = ((u64) msg_addr_upper) << 32 | msg_addr_lower;
msg_data = readl(msix_tbl + PCI_MSIX_ENTRY_DATA);
vec_ctrl = readl(msix_tbl + PCI_MSIX_ENTRY_VECTOR_CTRL);
iounmap(msix_tbl);
msg_addr = msix_tbl[(interrupt_num - 1)].msg_addr;
msg_data = msix_tbl[(interrupt_num - 1)].msg_data;
vec_ctrl = msix_tbl[(interrupt_num - 1)].vector_ctrl;
if (vec_ctrl & PCI_MSIX_ENTRY_CTRL_MASKBIT) {
dev_dbg(pci->dev, "MSI-X entry ctrl set\n");
return -EPERM;
}
ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys, msg_addr,
aligned_offset = msg_addr & (epc->mem->page_size - 1);
ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys, msg_addr,
epc->mem->page_size);
if (ret)
return ret;
writel(msg_data, ep->msi_mem);
writel(msg_data, ep->msi_mem + aligned_offset);
dw_pcie_ep_unmap_addr(epc, func_no, ep->msi_mem_phys);
@ -492,19 +500,54 @@ static unsigned int dw_pcie_ep_find_ext_capability(struct dw_pcie *pci, int cap)
return 0;
}
int dw_pcie_ep_init_complete(struct dw_pcie_ep *ep)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
unsigned int offset;
unsigned int nbars;
u8 hdr_type;
u32 reg;
int i;
hdr_type = dw_pcie_readb_dbi(pci, PCI_HEADER_TYPE);
if (hdr_type != PCI_HEADER_TYPE_NORMAL) {
dev_err(pci->dev,
"PCIe controller is not set to EP mode (hdr_type:0x%x)!\n",
hdr_type);
return -EIO;
}
ep->msi_cap = dw_pcie_find_capability(pci, PCI_CAP_ID_MSI);
ep->msix_cap = dw_pcie_find_capability(pci, PCI_CAP_ID_MSIX);
offset = dw_pcie_ep_find_ext_capability(pci, PCI_EXT_CAP_ID_REBAR);
if (offset) {
reg = dw_pcie_readl_dbi(pci, offset + PCI_REBAR_CTRL);
nbars = (reg & PCI_REBAR_CTRL_NBAR_MASK) >>
PCI_REBAR_CTRL_NBAR_SHIFT;
dw_pcie_dbi_ro_wr_en(pci);
for (i = 0; i < nbars; i++, offset += PCI_REBAR_CTRL)
dw_pcie_writel_dbi(pci, offset + PCI_REBAR_CAP, 0x0);
dw_pcie_dbi_ro_wr_dis(pci);
}
dw_pcie_setup(pci);
return 0;
}
EXPORT_SYMBOL_GPL(dw_pcie_ep_init_complete);
int dw_pcie_ep_init(struct dw_pcie_ep *ep)
{
int i;
int ret;
u32 reg;
void *addr;
u8 hdr_type;
unsigned int nbars;
unsigned int offset;
struct pci_epc *epc;
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
struct device *dev = pci->dev;
struct device_node *np = dev->of_node;
const struct pci_epc_features *epc_features;
if (!pci->dbi_base || !pci->dbi_base2) {
dev_err(dev, "dbi_base/dbi_base2 is not populated\n");
@ -563,13 +606,6 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
if (ep->ops->ep_init)
ep->ops->ep_init(ep);
hdr_type = dw_pcie_readb_dbi(pci, PCI_HEADER_TYPE);
if (hdr_type != PCI_HEADER_TYPE_NORMAL) {
dev_err(pci->dev, "PCIe controller is not set to EP mode (hdr_type:0x%x)!\n",
hdr_type);
return -EIO;
}
ret = of_property_read_u8(np, "max-functions", &epc->max_functions);
if (ret < 0)
epc->max_functions = 1;
@ -587,23 +623,13 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
dev_err(dev, "Failed to reserve memory for MSI/MSI-X\n");
return -ENOMEM;
}
ep->msi_cap = dw_pcie_find_capability(pci, PCI_CAP_ID_MSI);
ep->msix_cap = dw_pcie_find_capability(pci, PCI_CAP_ID_MSIX);
offset = dw_pcie_ep_find_ext_capability(pci, PCI_EXT_CAP_ID_REBAR);
if (offset) {
reg = dw_pcie_readl_dbi(pci, offset + PCI_REBAR_CTRL);
nbars = (reg & PCI_REBAR_CTRL_NBAR_MASK) >>
PCI_REBAR_CTRL_NBAR_SHIFT;
dw_pcie_dbi_ro_wr_en(pci);
for (i = 0; i < nbars; i++, offset += PCI_REBAR_CTRL)
dw_pcie_writel_dbi(pci, offset + PCI_REBAR_CAP, 0x0);
dw_pcie_dbi_ro_wr_dis(pci);
if (ep->ops->get_features) {
epc_features = ep->ops->get_features(ep);
if (epc_features->core_init_notifier)
return 0;
}
dw_pcie_setup(pci);
return 0;
return dw_pcie_ep_init_complete(ep);
}
EXPORT_SYMBOL_GPL(dw_pcie_ep_init);

12
drivers/pci/controller/dwc/pcie-designware.h
View File

@ -233,6 +233,7 @@ struct dw_pcie_ep {
phys_addr_t msi_mem_phys;
u8 msi_cap; /* MSI capability offset */
u8 msix_cap; /* MSI-X capability offset */
struct pci_epf_bar *epf_bar[PCI_STD_NUM_BARS];
};
struct dw_pcie_ops {
@ -411,6 +412,8 @@ static inline int dw_pcie_allocate_domains(struct pcie_port *pp)
#ifdef CONFIG_PCIE_DW_EP
void dw_pcie_ep_linkup(struct dw_pcie_ep *ep);
int dw_pcie_ep_init(struct dw_pcie_ep *ep);
int dw_pcie_ep_init_complete(struct dw_pcie_ep *ep);
void dw_pcie_ep_init_notify(struct dw_pcie_ep *ep);
void dw_pcie_ep_exit(struct dw_pcie_ep *ep);
int dw_pcie_ep_raise_legacy_irq(struct dw_pcie_ep *ep, u8 func_no);
int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
@ -428,6 +431,15 @@ static inline int dw_pcie_ep_init(struct dw_pcie_ep *ep)
return 0;
}
static inline int dw_pcie_ep_init_complete(struct dw_pcie_ep *ep)
{
return 0;
}
static inline void dw_pcie_ep_init_notify(struct dw_pcie_ep *ep)
{
}
static inline void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
{
}

8
drivers/pci/controller/dwc/pcie-qcom.c
View File

@ -1439,7 +1439,13 @@ static void qcom_fixup_class(struct pci_dev *dev)
{
dev->class = PCI_CLASS_BRIDGE_PCI << 8;
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, PCI_ANY_ID, qcom_fixup_class);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0101, qcom_fixup_class);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0104, qcom_fixup_class);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0106, qcom_fixup_class);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0107, qcom_fixup_class);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0302, qcom_fixup_class);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1000, qcom_fixup_class);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1001, qcom_fixup_class);
static struct platform_driver qcom_pcie_driver = {
.probe = qcom_pcie_probe,

712
drivers/pci/controller/dwc/pcie-tegra194.c
View File

@ -11,6 +11,7 @@
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
@ -53,6 +54,7 @@
#define APPL_INTR_EN_L0_0_LINK_STATE_INT_EN BIT(0)
#define APPL_INTR_EN_L0_0_MSI_RCV_INT_EN BIT(4)
#define APPL_INTR_EN_L0_0_INT_INT_EN BIT(8)
#define APPL_INTR_EN_L0_0_PCI_CMD_EN_INT_EN BIT(15)
#define APPL_INTR_EN_L0_0_CDM_REG_CHK_INT_EN BIT(19)
#define APPL_INTR_EN_L0_0_SYS_INTR_EN BIT(30)
#define APPL_INTR_EN_L0_0_SYS_MSI_INTR_EN BIT(31)
@ -60,19 +62,26 @@
#define APPL_INTR_STATUS_L0 0xC
#define APPL_INTR_STATUS_L0_LINK_STATE_INT BIT(0)
#define APPL_INTR_STATUS_L0_INT_INT BIT(8)
#define APPL_INTR_STATUS_L0_PCI_CMD_EN_INT BIT(15)
#define APPL_INTR_STATUS_L0_PEX_RST_INT BIT(16)
#define APPL_INTR_STATUS_L0_CDM_REG_CHK_INT BIT(18)
#define APPL_INTR_EN_L1_0_0 0x1C
#define APPL_INTR_EN_L1_0_0_LINK_REQ_RST_NOT_INT_EN BIT(1)
#define APPL_INTR_EN_L1_0_0_RDLH_LINK_UP_INT_EN BIT(3)
#define APPL_INTR_EN_L1_0_0_HOT_RESET_DONE_INT_EN BIT(30)
#define APPL_INTR_STATUS_L1_0_0 0x20
#define APPL_INTR_STATUS_L1_0_0_LINK_REQ_RST_NOT_CHGED BIT(1)
#define APPL_INTR_STATUS_L1_0_0_RDLH_LINK_UP_CHGED BIT(3)
#define APPL_INTR_STATUS_L1_0_0_HOT_RESET_DONE BIT(30)
#define APPL_INTR_STATUS_L1_1 0x2C
#define APPL_INTR_STATUS_L1_2 0x30
#define APPL_INTR_STATUS_L1_3 0x34
#define APPL_INTR_STATUS_L1_6 0x3C
#define APPL_INTR_STATUS_L1_7 0x40
#define APPL_INTR_STATUS_L1_15_CFG_BME_CHGED BIT(1)
#define APPL_INTR_EN_L1_8_0 0x44
#define APPL_INTR_EN_L1_8_BW_MGT_INT_EN BIT(2)
@ -103,8 +112,12 @@
#define APPL_INTR_STATUS_L1_18_CDM_REG_CHK_CMP_ERR BIT(1)
#define APPL_INTR_STATUS_L1_18_CDM_REG_CHK_LOGIC_ERR BIT(0)
#define APPL_MSI_CTRL_1 0xAC
#define APPL_MSI_CTRL_2 0xB0
#define APPL_LEGACY_INTX 0xB8
#define APPL_LTR_MSG_1 0xC4
#define LTR_MSG_REQ BIT(15)
#define LTR_MST_NO_SNOOP_SHIFT 16
@ -205,6 +218,13 @@
#define AMBA_ERROR_RESPONSE_CRS_OKAY_FFFFFFFF 1
#define AMBA_ERROR_RESPONSE_CRS_OKAY_FFFF0001 2
#define MSIX_ADDR_MATCH_LOW_OFF 0x940
#define MSIX_ADDR_MATCH_LOW_OFF_EN BIT(0)
#define MSIX_ADDR_MATCH_LOW_OFF_MASK GENMASK(31, 2)
#define MSIX_ADDR_MATCH_HIGH_OFF 0x944
#define MSIX_ADDR_MATCH_HIGH_OFF_MASK GENMASK(31, 0)
#define PORT_LOGIC_MSIX_DOORBELL 0x948
#define CAP_SPCIE_CAP_OFF 0x154
@ -223,6 +243,13 @@
#define GEN3_CORE_CLK_FREQ 250000000
#define GEN4_CORE_CLK_FREQ 500000000
#define LTR_MSG_TIMEOUT (100 * 1000)
#define PERST_DEBOUNCE_TIME (5 * 1000)
#define EP_STATE_DISABLED 0
#define EP_STATE_ENABLED 1
static const unsigned int pcie_gen_freq[] = {
GEN1_CORE_CLK_FREQ,
GEN2_CORE_CLK_FREQ,
@ -260,6 +287,8 @@ struct tegra_pcie_dw {
struct dw_pcie pci;
struct tegra_bpmp *bpmp;
enum dw_pcie_device_mode mode;
bool supports_clkreq;
bool enable_cdm_check;
bool link_state;
@ -283,6 +312,16 @@ struct tegra_pcie_dw {
struct phy **phys;
struct dentry *debugfs;
/* Endpoint mode specific */
struct gpio_desc *pex_rst_gpiod;
struct gpio_desc *pex_refclk_sel_gpiod;
unsigned int pex_rst_irq;
int ep_state;
};
struct tegra_pcie_dw_of_data {
enum dw_pcie_device_mode mode;
};
static inline struct tegra_pcie_dw *to_tegra_pcie(struct dw_pcie *pci)
@ -339,8 +378,9 @@ static void apply_bad_link_workaround(struct pcie_port *pp)
}
}
static irqreturn_t tegra_pcie_rp_irq_handler(struct tegra_pcie_dw *pcie)
static irqreturn_t tegra_pcie_rp_irq_handler(int irq, void *arg)
{
struct tegra_pcie_dw *pcie = arg;
struct dw_pcie *pci = &pcie->pci;
struct pcie_port *pp = &pci->pp;
u32 val, tmp;
@ -411,11 +451,121 @@ static irqreturn_t tegra_pcie_rp_irq_handler(struct tegra_pcie_dw *pcie)
return IRQ_HANDLED;
}
static irqreturn_t tegra_pcie_irq_handler(int irq, void *arg)
static void pex_ep_event_hot_rst_done(struct tegra_pcie_dw *pcie)
{
u32 val;
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L0);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_0_0);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_1);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_2);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_3);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_6);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_7);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_8_0);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_9);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_10);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_11);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_13);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_14);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_15);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_17);
appl_writel(pcie, 0xFFFFFFFF, APPL_MSI_CTRL_2);
val = appl_readl(pcie, APPL_CTRL);
val |= APPL_CTRL_LTSSM_EN;
appl_writel(pcie, val, APPL_CTRL);
}
static irqreturn_t tegra_pcie_ep_irq_thread(int irq, void *arg)
{
struct tegra_pcie_dw *pcie = arg;
struct dw_pcie *pci = &pcie->pci;
u32 val, speed;
return tegra_pcie_rp_irq_handler(pcie);
speed = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKSTA) &
PCI_EXP_LNKSTA_CLS;
clk_set_rate(pcie->core_clk, pcie_gen_freq[speed - 1]);
/* If EP doesn't advertise L1SS, just return */
val = dw_pcie_readl_dbi(pci, pcie->cfg_link_cap_l1sub);
if (!(val & (PCI_L1SS_CAP_ASPM_L1_1 | PCI_L1SS_CAP_ASPM_L1_2)))
return IRQ_HANDLED;
/* Check if BME is set to '1' */
val = dw_pcie_readl_dbi(pci, PCI_COMMAND);
if (val & PCI_COMMAND_MASTER) {
ktime_t timeout;
/* 110us for both snoop and no-snoop */
val = 110 | (2 << PCI_LTR_SCALE_SHIFT) | LTR_MSG_REQ;
val |= (val << LTR_MST_NO_SNOOP_SHIFT);
appl_writel(pcie, val, APPL_LTR_MSG_1);
/* Send LTR upstream */
val = appl_readl(pcie, APPL_LTR_MSG_2);
val |= APPL_LTR_MSG_2_LTR_MSG_REQ_STATE;
appl_writel(pcie, val, APPL_LTR_MSG_2);
timeout = ktime_add_us(ktime_get(), LTR_MSG_TIMEOUT);
for (;;) {
val = appl_readl(pcie, APPL_LTR_MSG_2);
if (!(val & APPL_LTR_MSG_2_LTR_MSG_REQ_STATE))
break;
if (ktime_after(ktime_get(), timeout))
break;
usleep_range(1000, 1100);
}
if (val & APPL_LTR_MSG_2_LTR_MSG_REQ_STATE)
dev_err(pcie->dev, "Failed to send LTR message\n");
}
return IRQ_HANDLED;
}
static irqreturn_t tegra_pcie_ep_hard_irq(int irq, void *arg)
{
struct tegra_pcie_dw *pcie = arg;
struct dw_pcie_ep *ep = &pcie->pci.ep;
int spurious = 1;
u32 val, tmp;
val = appl_readl(pcie, APPL_INTR_STATUS_L0);
if (val & APPL_INTR_STATUS_L0_LINK_STATE_INT) {
val = appl_readl(pcie, APPL_INTR_STATUS_L1_0_0);
appl_writel(pcie, val, APPL_INTR_STATUS_L1_0_0);
if (val & APPL_INTR_STATUS_L1_0_0_HOT_RESET_DONE)
pex_ep_event_hot_rst_done(pcie);
if (val & APPL_INTR_STATUS_L1_0_0_RDLH_LINK_UP_CHGED) {
tmp = appl_readl(pcie, APPL_LINK_STATUS);
if (tmp & APPL_LINK_STATUS_RDLH_LINK_UP) {
dev_dbg(pcie->dev, "Link is up with Host\n");
dw_pcie_ep_linkup(ep);
}
}
spurious = 0;
}
if (val & APPL_INTR_STATUS_L0_PCI_CMD_EN_INT) {
val = appl_readl(pcie, APPL_INTR_STATUS_L1_15);
appl_writel(pcie, val, APPL_INTR_STATUS_L1_15);
if (val & APPL_INTR_STATUS_L1_15_CFG_BME_CHGED)
return IRQ_WAKE_THREAD;
spurious = 0;
}
if (spurious) {
dev_warn(pcie->dev, "Random interrupt (STATUS = 0x%08X)\n",
val);
appl_writel(pcie, val, APPL_INTR_STATUS_L0);
}
return IRQ_HANDLED;
}
static int tegra_pcie_dw_rd_own_conf(struct pcie_port *pp, int where, int size,
@ -884,8 +1034,26 @@ static void tegra_pcie_set_msi_vec_num(struct pcie_port *pp)
pp->num_vectors = MAX_MSI_IRQS;
}
static int tegra_pcie_dw_start_link(struct dw_pcie *pci)
{
struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
enable_irq(pcie->pex_rst_irq);
return 0;
}
static void tegra_pcie_dw_stop_link(struct dw_pcie *pci)
{
struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
disable_irq(pcie->pex_rst_irq);
}
static const struct dw_pcie_ops tegra_dw_pcie_ops = {
.link_up = tegra_pcie_dw_link_up,
.start_link = tegra_pcie_dw_start_link,
.stop_link = tegra_pcie_dw_stop_link,
};
static struct dw_pcie_host_ops tegra_pcie_dw_host_ops = {
@ -986,6 +1154,40 @@ static int tegra_pcie_dw_parse_dt(struct tegra_pcie_dw *pcie)
pcie->enable_cdm_check =
of_property_read_bool(np, "snps,enable-cdm-check");
if (pcie->mode == DW_PCIE_RC_TYPE)
return 0;
/* Endpoint mode specific DT entries */
pcie->pex_rst_gpiod = devm_gpiod_get(pcie->dev, "reset", GPIOD_IN);
if (IS_ERR(pcie->pex_rst_gpiod)) {
int err = PTR_ERR(pcie->pex_rst_gpiod);
const char *level = KERN_ERR;
if (err == -EPROBE_DEFER)
level = KERN_DEBUG;
dev_printk(level, pcie->dev,
dev_fmt("Failed to get PERST GPIO: %d\n"),
err);
return err;
}
pcie->pex_refclk_sel_gpiod = devm_gpiod_get(pcie->dev,
"nvidia,refclk-select",
GPIOD_OUT_HIGH);
if (IS_ERR(pcie->pex_refclk_sel_gpiod)) {
int err = PTR_ERR(pcie->pex_refclk_sel_gpiod);
const char *level = KERN_ERR;
if (err == -EPROBE_DEFER)
level = KERN_DEBUG;
dev_printk(level, pcie->dev,
dev_fmt("Failed to get REFCLK select GPIOs: %d\n"),
err);
pcie->pex_refclk_sel_gpiod = NULL;
}
return 0;
}
@ -1017,6 +1219,34 @@ static int tegra_pcie_bpmp_set_ctrl_state(struct tegra_pcie_dw *pcie,
return tegra_bpmp_transfer(pcie->bpmp, &msg);
}
static int tegra_pcie_bpmp_set_pll_state(struct tegra_pcie_dw *pcie,
bool enable)
{
struct mrq_uphy_response resp;
struct tegra_bpmp_message msg;
struct mrq_uphy_request req;
memset(&req, 0, sizeof(req));
memset(&resp, 0, sizeof(resp));
if (enable) {
req.cmd = CMD_UPHY_PCIE_EP_CONTROLLER_PLL_INIT;
req.ep_ctrlr_pll_init.ep_controller = pcie->cid;
} else {
req.cmd = CMD_UPHY_PCIE_EP_CONTROLLER_PLL_OFF;
req.ep_ctrlr_pll_off.ep_controller = pcie->cid;
}
memset(&msg, 0, sizeof(msg));
msg.mrq = MRQ_UPHY;
msg.tx.data = &req;
msg.tx.size = sizeof(req);
msg.rx.data = &resp;
msg.rx.size = sizeof(resp);
return tegra_bpmp_transfer(pcie->bpmp, &msg);
}
static void tegra_pcie_downstream_dev_to_D0(struct tegra_pcie_dw *pcie)
{
struct pcie_port *pp = &pcie->pci.pp;
@ -1427,8 +1657,396 @@ fail_pm_get_sync:
return ret;
}
static void pex_ep_event_pex_rst_assert(struct tegra_pcie_dw *pcie)
{
u32 val;
int ret;
if (pcie->ep_state == EP_STATE_DISABLED)
return;
/* Disable LTSSM */
val = appl_readl(pcie, APPL_CTRL);
val &= ~APPL_CTRL_LTSSM_EN;
appl_writel(pcie, val, APPL_CTRL);
ret = readl_poll_timeout(pcie->appl_base + APPL_DEBUG, val,
((val & APPL_DEBUG_LTSSM_STATE_MASK) >>
APPL_DEBUG_LTSSM_STATE_SHIFT) ==
LTSSM_STATE_PRE_DETECT,
1, LTSSM_TIMEOUT);
if (ret)
dev_err(pcie->dev, "Failed to go Detect state: %d\n", ret);
reset_control_assert(pcie->core_rst);
tegra_pcie_disable_phy(pcie);
reset_control_assert(pcie->core_apb_rst);
clk_disable_unprepare(pcie->core_clk);
pm_runtime_put_sync(pcie->dev);
ret = tegra_pcie_bpmp_set_pll_state(pcie, false);
if (ret)
dev_err(pcie->dev, "Failed to turn off UPHY: %d\n", ret);
pcie->ep_state = EP_STATE_DISABLED;
dev_dbg(pcie->dev, "Uninitialization of endpoint is completed\n");
}
static void pex_ep_event_pex_rst_deassert(struct tegra_pcie_dw *pcie)
{
struct dw_pcie *pci = &pcie->pci;
struct dw_pcie_ep *ep = &pci->ep;
struct device *dev = pcie->dev;
u32 val;
int ret;
if (pcie->ep_state == EP_STATE_ENABLED)
return;
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
dev_err(dev, "Failed to get runtime sync for PCIe dev: %d\n",
ret);
return;
}
ret = tegra_pcie_bpmp_set_pll_state(pcie, true);
if (ret) {
dev_err(dev, "Failed to init UPHY for PCIe EP: %d\n", ret);
goto fail_pll_init;
}
ret = clk_prepare_enable(pcie->core_clk);
if (ret) {
dev_err(dev, "Failed to enable core clock: %d\n", ret);
goto fail_core_clk_enable;
}
ret = reset_control_deassert(pcie->core_apb_rst);
if (ret) {
dev_err(dev, "Failed to deassert core APB reset: %d\n", ret);
goto fail_core_apb_rst;
}
ret = tegra_pcie_enable_phy(pcie);
if (ret) {
dev_err(dev, "Failed to enable PHY: %d\n", ret);
goto fail_phy;
}
/* Clear any stale interrupt statuses */
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L0);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_0_0);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_1);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_2);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_3);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_6);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_7);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_8_0);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_9);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_10);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_11);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_13);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_14);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_15);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L1_17);
/* configure this core for EP mode operation */
val = appl_readl(pcie, APPL_DM_TYPE);
val &= ~APPL_DM_TYPE_MASK;
val |= APPL_DM_TYPE_EP;
appl_writel(pcie, val, APPL_DM_TYPE);
appl_writel(pcie, 0x0, APPL_CFG_SLCG_OVERRIDE);
val = appl_readl(pcie, APPL_CTRL);
val |= APPL_CTRL_SYS_PRE_DET_STATE;
val |= APPL_CTRL_HW_HOT_RST_EN;
appl_writel(pcie, val, APPL_CTRL);
val = appl_readl(pcie, APPL_CFG_MISC);
val |= APPL_CFG_MISC_SLV_EP_MODE;
val |= (APPL_CFG_MISC_ARCACHE_VAL << APPL_CFG_MISC_ARCACHE_SHIFT);
appl_writel(pcie, val, APPL_CFG_MISC);
val = appl_readl(pcie, APPL_PINMUX);
val |= APPL_PINMUX_CLK_OUTPUT_IN_OVERRIDE_EN;
val |= APPL_PINMUX_CLK_OUTPUT_IN_OVERRIDE;
appl_writel(pcie, val, APPL_PINMUX);
appl_writel(pcie, pcie->dbi_res->start & APPL_CFG_BASE_ADDR_MASK,
APPL_CFG_BASE_ADDR);
appl_writel(pcie, pcie->atu_dma_res->start &
APPL_CFG_IATU_DMA_BASE_ADDR_MASK,
APPL_CFG_IATU_DMA_BASE_ADDR);
val = appl_readl(pcie, APPL_INTR_EN_L0_0);
val |= APPL_INTR_EN_L0_0_SYS_INTR_EN;
val |= APPL_INTR_EN_L0_0_LINK_STATE_INT_EN;
val |= APPL_INTR_EN_L0_0_PCI_CMD_EN_INT_EN;
appl_writel(pcie, val, APPL_INTR_EN_L0_0);
val = appl_readl(pcie, APPL_INTR_EN_L1_0_0);
val |= APPL_INTR_EN_L1_0_0_HOT_RESET_DONE_INT_EN;
val |= APPL_INTR_EN_L1_0_0_RDLH_LINK_UP_INT_EN;
appl_writel(pcie, val, APPL_INTR_EN_L1_0_0);
reset_control_deassert(pcie->core_rst);
if (pcie->update_fc_fixup) {
val = dw_pcie_readl_dbi(pci, CFG_TIMER_CTRL_MAX_FUNC_NUM_OFF);
val |= 0x1 << CFG_TIMER_CTRL_ACK_NAK_SHIFT;
dw_pcie_writel_dbi(pci, CFG_TIMER_CTRL_MAX_FUNC_NUM_OFF, val);
}
config_gen3_gen4_eq_presets(pcie);
init_host_aspm(pcie);
/* Disable ASPM-L1SS advertisement if there is no CLKREQ routing */
if (!pcie->supports_clkreq) {
disable_aspm_l11(pcie);
disable_aspm_l12(pcie);
}
val = dw_pcie_readl_dbi(pci, GEN3_RELATED_OFF);
val &= ~GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL;
dw_pcie_writel_dbi(pci, GEN3_RELATED_OFF, val);
/* Configure N_FTS & FTS */
val = dw_pcie_readl_dbi(pci, PORT_LOGIC_ACK_F_ASPM_CTRL);
val &= ~(N_FTS_MASK << N_FTS_SHIFT);
val |= N_FTS_VAL << N_FTS_SHIFT;
dw_pcie_writel_dbi(pci, PORT_LOGIC_ACK_F_ASPM_CTRL, val);
val = dw_pcie_readl_dbi(pci, PORT_LOGIC_GEN2_CTRL);
val &= ~FTS_MASK;
val |= FTS_VAL;
dw_pcie_writel_dbi(pci, PORT_LOGIC_GEN2_CTRL, val);
/* Configure Max Speed from DT */
if (pcie->max_speed && pcie->max_speed != -EINVAL) {
val = dw_pcie_readl_dbi(pci, pcie->pcie_cap_base +
PCI_EXP_LNKCAP);
val &= ~PCI_EXP_LNKCAP_SLS;
val |= pcie->max_speed;
dw_pcie_writel_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKCAP,
val);
}
pcie->pcie_cap_base = dw_pcie_find_capability(&pcie->pci,
PCI_CAP_ID_EXP);
clk_set_rate(pcie->core_clk, GEN4_CORE_CLK_FREQ);
val = (ep->msi_mem_phys & MSIX_ADDR_MATCH_LOW_OFF_MASK);
val |= MSIX_ADDR_MATCH_LOW_OFF_EN;
dw_pcie_writel_dbi(pci, MSIX_ADDR_MATCH_LOW_OFF, val);
val = (lower_32_bits(ep->msi_mem_phys) & MSIX_ADDR_MATCH_HIGH_OFF_MASK);
dw_pcie_writel_dbi(pci, MSIX_ADDR_MATCH_HIGH_OFF, val);
ret = dw_pcie_ep_init_complete(ep);
if (ret) {
dev_err(dev, "Failed to complete initialization: %d\n", ret);
goto fail_init_complete;
}
dw_pcie_ep_init_notify(ep);
/* Enable LTSSM */
val = appl_readl(pcie, APPL_CTRL);
val |= APPL_CTRL_LTSSM_EN;
appl_writel(pcie, val, APPL_CTRL);
pcie->ep_state = EP_STATE_ENABLED;
dev_dbg(dev, "Initialization of endpoint is completed\n");
return;
fail_init_complete:
reset_control_assert(pcie->core_rst);
tegra_pcie_disable_phy(pcie);
fail_phy:
reset_control_assert(pcie->core_apb_rst);
fail_core_apb_rst:
clk_disable_unprepare(pcie->core_clk);
fail_core_clk_enable:
tegra_pcie_bpmp_set_pll_state(pcie, false);
fail_pll_init:
pm_runtime_put_sync(dev);
}
static irqreturn_t tegra_pcie_ep_pex_rst_irq(int irq, void *arg)
{
struct tegra_pcie_dw *pcie = arg;
if (gpiod_get_value(pcie->pex_rst_gpiod))
pex_ep_event_pex_rst_assert(pcie);
else
pex_ep_event_pex_rst_deassert(pcie);
return IRQ_HANDLED;
}
static int tegra_pcie_ep_raise_legacy_irq(struct tegra_pcie_dw *pcie, u16 irq)
{
/* Tegra194 supports only INTA */
if (irq > 1)
return -EINVAL;
appl_writel(pcie, 1, APPL_LEGACY_INTX);
usleep_range(1000, 2000);
appl_writel(pcie, 0, APPL_LEGACY_INTX);
return 0;
}
static int tegra_pcie_ep_raise_msi_irq(struct tegra_pcie_dw *pcie, u16 irq)
{
if (unlikely(irq > 31))
return -EINVAL;
appl_writel(pcie, (1 << irq), APPL_MSI_CTRL_1);
return 0;
}
static int tegra_pcie_ep_raise_msix_irq(struct tegra_pcie_dw *pcie, u16 irq)
{
struct dw_pcie_ep *ep = &pcie->pci.ep;
writel(irq, ep->msi_mem);
return 0;
}
static int tegra_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
enum pci_epc_irq_type type,
u16 interrupt_num)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
switch (type) {
case PCI_EPC_IRQ_LEGACY:
return tegra_pcie_ep_raise_legacy_irq(pcie, interrupt_num);
case PCI_EPC_IRQ_MSI:
return tegra_pcie_ep_raise_msi_irq(pcie, interrupt_num);
case PCI_EPC_IRQ_MSIX:
return tegra_pcie_ep_raise_msix_irq(pcie, interrupt_num);
default:
dev_err(pci->dev, "Unknown IRQ type\n");
return -EPERM;
}
return 0;
}
static const struct pci_epc_features tegra_pcie_epc_features = {
.linkup_notifier = true,
.core_init_notifier = true,
.msi_capable = false,
.msix_capable = false,
.reserved_bar = 1 << BAR_2 | 1 << BAR_3 | 1 << BAR_4 | 1 << BAR_5,
.bar_fixed_64bit = 1 << BAR_0,
.bar_fixed_size[0] = SZ_1M,
};
static const struct pci_epc_features*
tegra_pcie_ep_get_features(struct dw_pcie_ep *ep)
{
return &tegra_pcie_epc_features;
}
static struct dw_pcie_ep_ops pcie_ep_ops = {
.raise_irq = tegra_pcie_ep_raise_irq,
.get_features = tegra_pcie_ep_get_features,
};
static int tegra_pcie_config_ep(struct tegra_pcie_dw *pcie,
struct platform_device *pdev)
{
struct dw_pcie *pci = &pcie->pci;
struct device *dev = pcie->dev;
struct dw_pcie_ep *ep;
struct resource *res;
char *name;
int ret;
ep = &pci->ep;
ep->ops = &pcie_ep_ops;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
if (!res)
return -EINVAL;
ep->phys_base = res->start;
ep->addr_size = resource_size(res);
ep->page_size = SZ_64K;
ret = gpiod_set_debounce(pcie->pex_rst_gpiod, PERST_DEBOUNCE_TIME);
if (ret < 0) {
dev_err(dev, "Failed to set PERST GPIO debounce time: %d\n",
ret);
return ret;
}
ret = gpiod_to_irq(pcie->pex_rst_gpiod);
if (ret < 0) {
dev_err(dev, "Failed to get IRQ for PERST GPIO: %d\n", ret);
return ret;
}
pcie->pex_rst_irq = (unsigned int)ret;
name = devm_kasprintf(dev, GFP_KERNEL, "tegra_pcie_%u_pex_rst_irq",
pcie->cid);
if (!name) {
dev_err(dev, "Failed to create PERST IRQ string\n");
return -ENOMEM;
}
irq_set_status_flags(pcie->pex_rst_irq, IRQ_NOAUTOEN);
pcie->ep_state = EP_STATE_DISABLED;
ret = devm_request_threaded_irq(dev, pcie->pex_rst_irq, NULL,
tegra_pcie_ep_pex_rst_irq,
IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
name, (void *)pcie);
if (ret < 0) {
dev_err(dev, "Failed to request IRQ for PERST: %d\n", ret);
return ret;
}
name = devm_kasprintf(dev, GFP_KERNEL, "tegra_pcie_%u_ep_work",
pcie->cid);
if (!name) {
dev_err(dev, "Failed to create PCIe EP work thread string\n");
return -ENOMEM;
}
pm_runtime_enable(dev);
ret = dw_pcie_ep_init(ep);
if (ret) {
dev_err(dev, "Failed to initialize DWC Endpoint subsystem: %d\n",
ret);
return ret;
}
return 0;
}
static int tegra_pcie_dw_probe(struct platform_device *pdev)
{
const struct tegra_pcie_dw_of_data *data;
struct device *dev = &pdev->dev;
struct resource *atu_dma_res;
struct tegra_pcie_dw *pcie;
@ -1440,6 +2058,8 @@ static int tegra_pcie_dw_probe(struct platform_device *pdev)
int ret;
u32 i;
data = of_device_get_match_data(dev);
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
return -ENOMEM;
@ -1449,19 +2069,37 @@ static int tegra_pcie_dw_probe(struct platform_device *pdev)
pci->ops = &tegra_dw_pcie_ops;
pp = &pci->pp;
pcie->dev = &pdev->dev;
pcie->mode = (enum dw_pcie_device_mode)data->mode;
ret = tegra_pcie_dw_parse_dt(pcie);
if (ret < 0) {
dev_err(dev, "Failed to parse device tree: %d\n", ret);
const char *level = KERN_ERR;
if (ret == -EPROBE_DEFER)
level = KERN_DEBUG;
dev_printk(level, dev,
dev_fmt("Failed to parse device tree: %d\n"),
ret);
return ret;
}
ret = tegra_pcie_get_slot_regulators(pcie);
if (ret < 0) {
dev_err(dev, "Failed to get slot regulators: %d\n", ret);
const char *level = KERN_ERR;
if (ret == -EPROBE_DEFER)
level = KERN_DEBUG;
dev_printk(level, dev,
dev_fmt("Failed to get slot regulators: %d\n"),
ret);
return ret;
}
if (pcie->pex_refclk_sel_gpiod)
gpiod_set_value(pcie->pex_refclk_sel_gpiod, 1);
pcie->pex_ctl_supply = devm_regulator_get(dev, "vddio-pex-ctl");
if (IS_ERR(pcie->pex_ctl_supply)) {
ret = PTR_ERR(pcie->pex_ctl_supply);
@ -1557,24 +2195,49 @@ static int tegra_pcie_dw_probe(struct platform_device *pdev)
return -ENODEV;
}
ret = devm_request_irq(dev, pp->irq, tegra_pcie_irq_handler,
IRQF_SHARED, "tegra-pcie-intr", pcie);
if (ret) {
dev_err(dev, "Failed to request IRQ %d: %d\n", pp->irq, ret);
return ret;
}
pcie->bpmp = tegra_bpmp_get(dev);
if (IS_ERR(pcie->bpmp))
return PTR_ERR(pcie->bpmp);
platform_set_drvdata(pdev, pcie);
ret = tegra_pcie_config_rp(pcie);
if (ret && ret != -ENOMEDIUM)
goto fail;
else
return 0;
switch (pcie->mode) {
case DW_PCIE_RC_TYPE:
ret = devm_request_irq(dev, pp->irq, tegra_pcie_rp_irq_handler,
IRQF_SHARED, "tegra-pcie-intr", pcie);
if (ret) {
dev_err(dev, "Failed to request IRQ %d: %d\n", pp->irq,
ret);
goto fail;
}
ret = tegra_pcie_config_rp(pcie);
if (ret && ret != -ENOMEDIUM)
goto fail;
else
return 0;
break;
case DW_PCIE_EP_TYPE:
ret = devm_request_threaded_irq(dev, pp->irq,
tegra_pcie_ep_hard_irq,
tegra_pcie_ep_irq_thread,
IRQF_SHARED | IRQF_ONESHOT,
"tegra-pcie-ep-intr", pcie);
if (ret) {
dev_err(dev, "Failed to request IRQ %d: %d\n", pp->irq,
ret);
goto fail;
}
ret = tegra_pcie_config_ep(pcie, pdev);
if (ret < 0)
goto fail;
break;
default:
dev_err(dev, "Invalid PCIe device type %d\n", pcie->mode);
}
fail:
tegra_bpmp_put(pcie->bpmp);
@ -1593,6 +2256,8 @@ static int tegra_pcie_dw_remove(struct platform_device *pdev)
pm_runtime_put_sync(pcie->dev);
pm_runtime_disable(pcie->dev);
tegra_bpmp_put(pcie->bpmp);
if (pcie->pex_refclk_sel_gpiod)
gpiod_set_value(pcie->pex_refclk_sel_gpiod, 0);
return 0;
}
@ -1697,9 +2362,22 @@ static void tegra_pcie_dw_shutdown(struct platform_device *pdev)
__deinit_controller(pcie);
}
static const struct tegra_pcie_dw_of_data tegra_pcie_dw_rc_of_data = {
.mode = DW_PCIE_RC_TYPE,
};
static const struct tegra_pcie_dw_of_data tegra_pcie_dw_ep_of_data = {
.mode = DW_PCIE_EP_TYPE,
};
static const struct of_device_id tegra_pcie_dw_of_match[] = {
{
.compatible = "nvidia,tegra194-pcie",
.data = &tegra_pcie_dw_rc_of_data,
},
{
.compatible = "nvidia,tegra194-pcie-ep",
.data = &tegra_pcie_dw_ep_of_data,
},
{},
};

34
drivers/pci/controller/mobiveil/Kconfig Normal file
View File

@ -0,0 +1,34 @@
# SPDX-License-Identifier: GPL-2.0
menu "Mobiveil PCIe Core Support"
depends on PCI
config PCIE_MOBIVEIL
bool
config PCIE_MOBIVEIL_HOST
bool
depends on PCI_MSI_IRQ_DOMAIN
select PCIE_MOBIVEIL
config PCIE_MOBIVEIL_PLAT
bool "Mobiveil AXI PCIe controller"
depends on ARCH_ZYNQMP || COMPILE_TEST
depends on OF
depends on PCI_MSI_IRQ_DOMAIN
select PCIE_MOBIVEIL_HOST
help
Say Y here if you want to enable support for the Mobiveil AXI PCIe
Soft IP. It has up to 8 outbound and inbound windows
for address translation and it is a PCIe Gen4 IP.
config PCIE_LAYERSCAPE_GEN4
bool "Freescale Layerscape PCIe Gen4 controller"
depends on PCI
depends on OF && (ARM64 || ARCH_LAYERSCAPE)
depends on PCI_MSI_IRQ_DOMAIN
select PCIE_MOBIVEIL_HOST
help
Say Y here if you want PCIe Gen4 controller support on
Layerscape SoCs.
endmenu

5
drivers/pci/controller/mobiveil/Makefile Normal file
View File

@ -0,0 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
obj-$(CONFIG_PCIE_MOBIVEIL_HOST) += pcie-mobiveil-host.o
obj-$(CONFIG_PCIE_MOBIVEIL_PLAT) += pcie-mobiveil-plat.o
obj-$(CONFIG_PCIE_LAYERSCAPE_GEN4) += pcie-layerscape-gen4.o

267
drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c Normal file
View File

@ -0,0 +1,267 @@
// SPDX-License-Identifier: GPL-2.0
/*
* PCIe Gen4 host controller driver for NXP Layerscape SoCs
*
* Copyright 2019-2020 NXP
*
* Author: Zhiqiang Hou <Zhiqiang.Hou@nxp.com>
*/
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/of_pci.h>
#include <linux/of_platform.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/resource.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include "pcie-mobiveil.h"
/* LUT and PF control registers */
#define PCIE_LUT_OFF 0x80000
#define PCIE_PF_OFF 0xc0000
#define PCIE_PF_INT_STAT 0x18
#define PF_INT_STAT_PABRST BIT(31)
#define PCIE_PF_DBG 0x7fc
#define PF_DBG_LTSSM_MASK 0x3f
#define PF_DBG_LTSSM_L0 0x2d /* L0 state */
#define PF_DBG_WE BIT(31)
#define PF_DBG_PABR BIT(27)
#define to_ls_pcie_g4(x) platform_get_drvdata((x)->pdev)
struct ls_pcie_g4 {
struct mobiveil_pcie pci;
struct delayed_work dwork;
int irq;
};
static inline u32 ls_pcie_g4_lut_readl(struct ls_pcie_g4 *pcie, u32 off)
{
return ioread32(pcie->pci.csr_axi_slave_base + PCIE_LUT_OFF + off);
}
static inline void ls_pcie_g4_lut_writel(struct ls_pcie_g4 *pcie,
u32 off, u32 val)
{
iowrite32(val, pcie->pci.csr_axi_slave_base + PCIE_LUT_OFF + off);
}
static inline u32 ls_pcie_g4_pf_readl(struct ls_pcie_g4 *pcie, u32 off)
{
return ioread32(pcie->pci.csr_axi_slave_base + PCIE_PF_OFF + off);
}
static inline void ls_pcie_g4_pf_writel(struct ls_pcie_g4 *pcie,
u32 off, u32 val)
{
iowrite32(val, pcie->pci.csr_axi_slave_base + PCIE_PF_OFF + off);
}
static int ls_pcie_g4_link_up(struct mobiveil_pcie *pci)
{
struct ls_pcie_g4 *pcie = to_ls_pcie_g4(pci);
u32 state;
state = ls_pcie_g4_pf_readl(pcie, PCIE_PF_DBG);
state = state & PF_DBG_LTSSM_MASK;
if (state == PF_DBG_LTSSM_L0)
return 1;
return 0;
}
static void ls_pcie_g4_disable_interrupt(struct ls_pcie_g4 *pcie)
{
struct mobiveil_pcie *mv_pci = &pcie->pci;
mobiveil_csr_writel(mv_pci, 0, PAB_INTP_AMBA_MISC_ENB);
}
static void ls_pcie_g4_enable_interrupt(struct ls_pcie_g4 *pcie)
{
struct mobiveil_pcie *mv_pci = &pcie->pci;
u32 val;
/* Clear the interrupt status */
mobiveil_csr_writel(mv_pci, 0xffffffff, PAB_INTP_AMBA_MISC_STAT);
val = PAB_INTP_INTX_MASK | PAB_INTP_MSI | PAB_INTP_RESET |
PAB_INTP_PCIE_UE | PAB_INTP_IE_PMREDI | PAB_INTP_IE_EC;
mobiveil_csr_writel(mv_pci, val, PAB_INTP_AMBA_MISC_ENB);
}
static int ls_pcie_g4_reinit_hw(struct ls_pcie_g4 *pcie)
{
struct mobiveil_pcie *mv_pci = &pcie->pci;
struct device *dev = &mv_pci->pdev->dev;
u32 val, act_stat;
int to = 100;
/* Poll for pab_csb_reset to set and PAB activity to clear */
do {
usleep_range(10, 15);
val = ls_pcie_g4_pf_readl(pcie, PCIE_PF_INT_STAT);
act_stat = mobiveil_csr_readl(mv_pci, PAB_ACTIVITY_STAT);
} while (((val & PF_INT_STAT_PABRST) == 0 || act_stat) && to--);
if (to < 0) {
dev_err(dev, "Poll PABRST&PABACT timeout\n");
return -EIO;
}
/* clear PEX_RESET bit in PEX_PF0_DBG register */
val = ls_pcie_g4_pf_readl(pcie, PCIE_PF_DBG);
val |= PF_DBG_WE;
ls_pcie_g4_pf_writel(pcie, PCIE_PF_DBG, val);
val = ls_pcie_g4_pf_readl(pcie, PCIE_PF_DBG);
val |= PF_DBG_PABR;
ls_pcie_g4_pf_writel(pcie, PCIE_PF_DBG, val);
val = ls_pcie_g4_pf_readl(pcie, PCIE_PF_DBG);
val &= ~PF_DBG_WE;
ls_pcie_g4_pf_writel(pcie, PCIE_PF_DBG, val);
mobiveil_host_init(mv_pci, true);
to = 100;
while (!ls_pcie_g4_link_up(mv_pci) && to--)
usleep_range(200, 250);
if (to < 0) {
dev_err(dev, "PCIe link training timeout\n");
return -EIO;
}
return 0;
}
static irqreturn_t ls_pcie_g4_isr(int irq, void *dev_id)
{
struct ls_pcie_g4 *pcie = (struct ls_pcie_g4 *)dev_id;
struct mobiveil_pcie *mv_pci = &pcie->pci;
u32 val;
val = mobiveil_csr_readl(mv_pci, PAB_INTP_AMBA_MISC_STAT);
if (!val)
return IRQ_NONE;
if (val & PAB_INTP_RESET) {
ls_pcie_g4_disable_interrupt(pcie);
schedule_delayed_work(&pcie->dwork, msecs_to_jiffies(1));
}
mobiveil_csr_writel(mv_pci, val, PAB_INTP_AMBA_MISC_STAT);
return IRQ_HANDLED;
}
static int ls_pcie_g4_interrupt_init(struct mobiveil_pcie *mv_pci)
{
struct ls_pcie_g4 *pcie = to_ls_pcie_g4(mv_pci);
struct platform_device *pdev = mv_pci->pdev;
struct device *dev = &pdev->dev;
int ret;
pcie->irq = platform_get_irq_byname(pdev, "intr");
if (pcie->irq < 0) {
dev_err(dev, "Can't get 'intr' IRQ, errno = %d\n", pcie->irq);
return pcie->irq;
}
ret = devm_request_irq(dev, pcie->irq, ls_pcie_g4_isr,
IRQF_SHARED, pdev->name, pcie);
if (ret) {
dev_err(dev, "Can't register PCIe IRQ, errno = %d\n", ret);
return ret;
}
return 0;
}
static void ls_pcie_g4_reset(struct work_struct *work)
{
struct delayed_work *dwork = container_of(work, struct delayed_work,
work);
struct ls_pcie_g4 *pcie = container_of(dwork, struct ls_pcie_g4, dwork);
struct mobiveil_pcie *mv_pci = &pcie->pci;
u16 ctrl;
ctrl = mobiveil_csr_readw(mv_pci, PCI_BRIDGE_CONTROL);
ctrl &= ~PCI_BRIDGE_CTL_BUS_RESET;
mobiveil_csr_writew(mv_pci, ctrl, PCI_BRIDGE_CONTROL);
if (!ls_pcie_g4_reinit_hw(pcie))
return;
ls_pcie_g4_enable_interrupt(pcie);
}
static struct mobiveil_rp_ops ls_pcie_g4_rp_ops = {
.interrupt_init = ls_pcie_g4_interrupt_init,
};
static const struct mobiveil_pab_ops ls_pcie_g4_pab_ops = {
.link_up = ls_pcie_g4_link_up,
};
static int __init ls_pcie_g4_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct pci_host_bridge *bridge;
struct mobiveil_pcie *mv_pci;
struct ls_pcie_g4 *pcie;
struct device_node *np = dev->of_node;
int ret;
if (!of_parse_phandle(np, "msi-parent", 0)) {
dev_err(dev, "Failed to find msi-parent\n");
return -EINVAL;
}
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
if (!bridge)
return -ENOMEM;
pcie = pci_host_bridge_priv(bridge);
mv_pci = &pcie->pci;
mv_pci->pdev = pdev;
mv_pci->ops = &ls_pcie_g4_pab_ops;
mv_pci->rp.ops = &ls_pcie_g4_rp_ops;
mv_pci->rp.bridge = bridge;
platform_set_drvdata(pdev, pcie);
INIT_DELAYED_WORK(&pcie->dwork, ls_pcie_g4_reset);
ret = mobiveil_pcie_host_probe(mv_pci);
if (ret) {
dev_err(dev, "Fail to probe\n");
return ret;
}
ls_pcie_g4_enable_interrupt(pcie);
return 0;
}
static const struct of_device_id ls_pcie_g4_of_match[] = {
{ .compatible = "fsl,lx2160a-pcie", },
{ },
};
static struct platform_driver ls_pcie_g4_driver = {
.driver = {
.name = "layerscape-pcie-gen4",
.of_match_table = ls_pcie_g4_of_match,
.suppress_bind_attrs = true,
},
};
builtin_platform_driver_probe(ls_pcie_g4_driver, ls_pcie_g4_probe);

564
drivers/pci/controller/pcie-mobiveil.c → drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
View File

@ -3,10 +3,12 @@
* PCIe host controller driver for Mobiveil PCIe Host controller
*
* Copyright (c) 2018 Mobiveil Inc.
* Copyright 2019-2020 NXP
*
* Author: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
* Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
*/
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
@ -23,274 +25,22 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include "../pci.h"
/* register offsets and bit positions */
/*
* translation tables are grouped into windows, each window registers are
* grouped into blocks of 4 or 16 registers each
*/
#define PAB_REG_BLOCK_SIZE 16
#define PAB_EXT_REG_BLOCK_SIZE 4
#define PAB_REG_ADDR(offset, win) \
(offset + (win * PAB_REG_BLOCK_SIZE))
#define PAB_EXT_REG_ADDR(offset, win) \
(offset + (win * PAB_EXT_REG_BLOCK_SIZE))
#define LTSSM_STATUS 0x0404
#define LTSSM_STATUS_L0_MASK 0x3f
#define LTSSM_STATUS_L0 0x2d
#define PAB_CTRL 0x0808
#define AMBA_PIO_ENABLE_SHIFT 0
#define PEX_PIO_ENABLE_SHIFT 1
#define PAGE_SEL_SHIFT 13
#define PAGE_SEL_MASK 0x3f
#define PAGE_LO_MASK 0x3ff
#define PAGE_SEL_OFFSET_SHIFT 10
#define PAB_AXI_PIO_CTRL 0x0840
#define APIO_EN_MASK 0xf
#define PAB_PEX_PIO_CTRL 0x08c0
#define PIO_ENABLE_SHIFT 0
#define PAB_INTP_AMBA_MISC_ENB 0x0b0c
#define PAB_INTP_AMBA_MISC_STAT 0x0b1c
#define PAB_INTP_INTX_MASK 0x01e0
#define PAB_INTP_MSI_MASK 0x8
#define PAB_AXI_AMAP_CTRL(win) PAB_REG_ADDR(0x0ba0, win)
#define WIN_ENABLE_SHIFT 0
#define WIN_TYPE_SHIFT 1
#define WIN_TYPE_MASK 0x3
#define WIN_SIZE_MASK 0xfffffc00
#define PAB_EXT_AXI_AMAP_SIZE(win) PAB_EXT_REG_ADDR(0xbaf0, win)
#define PAB_EXT_AXI_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0x80a0, win)
#define PAB_AXI_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x0ba4, win)
#define AXI_WINDOW_ALIGN_MASK 3
#define PAB_AXI_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x0ba8, win)
#define PAB_BUS_SHIFT 24
#define PAB_DEVICE_SHIFT 19
#define PAB_FUNCTION_SHIFT 16
#define PAB_AXI_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x0bac, win)
#define PAB_INTP_AXI_PIO_CLASS 0x474
#define PAB_PEX_AMAP_CTRL(win) PAB_REG_ADDR(0x4ba0, win)
#define AMAP_CTRL_EN_SHIFT 0
#define AMAP_CTRL_TYPE_SHIFT 1
#define AMAP_CTRL_TYPE_MASK 3
#define PAB_EXT_PEX_AMAP_SIZEN(win) PAB_EXT_REG_ADDR(0xbef0, win)
#define PAB_EXT_PEX_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0xb4a0, win)
#define PAB_PEX_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x4ba4, win)
#define PAB_PEX_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x4ba8, win)
#define PAB_PEX_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x4bac, win)
/* starting offset of INTX bits in status register */
#define PAB_INTX_START 5
/* supported number of MSI interrupts */
#define PCI_NUM_MSI 16
/* MSI registers */
#define MSI_BASE_LO_OFFSET 0x04
#define MSI_BASE_HI_OFFSET 0x08
#define MSI_SIZE_OFFSET 0x0c
#define MSI_ENABLE_OFFSET 0x14
#define MSI_STATUS_OFFSET 0x18
#define MSI_DATA_OFFSET 0x20
#define MSI_ADDR_L_OFFSET 0x24
#define MSI_ADDR_H_OFFSET 0x28
/* outbound and inbound window definitions */
#define WIN_NUM_0 0
#define WIN_NUM_1 1
#define CFG_WINDOW_TYPE 0
#define IO_WINDOW_TYPE 1
#define MEM_WINDOW_TYPE 2
#define IB_WIN_SIZE ((u64)256 * 1024 * 1024 * 1024)
#define MAX_PIO_WINDOWS 8
/* Parameters for the waiting for link up routine */
#define LINK_WAIT_MAX_RETRIES 10
#define LINK_WAIT_MIN 90000
#define LINK_WAIT_MAX 100000
#define PAGED_ADDR_BNDRY 0xc00
#define OFFSET_TO_PAGE_ADDR(off) \
((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY)
#define OFFSET_TO_PAGE_IDX(off) \
((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK)
struct mobiveil_msi { /* MSI information */
struct mutex lock; /* protect bitmap variable */
struct irq_domain *msi_domain;
struct irq_domain *dev_domain;
phys_addr_t msi_pages_phys;
int num_of_vectors;
DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI);
};
struct mobiveil_pcie {
struct platform_device *pdev;
void __iomem *config_axi_slave_base; /* endpoint config base */
void __iomem *csr_axi_slave_base; /* root port config base */
void __iomem *apb_csr_base; /* MSI register base */
phys_addr_t pcie_reg_base; /* Physical PCIe Controller Base */
struct irq_domain *intx_domain;
raw_spinlock_t intx_mask_lock;
int irq;
int apio_wins;
int ppio_wins;
int ob_wins_configured; /* configured outbound windows */
int ib_wins_configured; /* configured inbound windows */
struct resource *ob_io_res;
char root_bus_nr;
struct mobiveil_msi msi;
};
/*
* mobiveil_pcie_sel_page - routine to access paged register
*
* Registers whose address greater than PAGED_ADDR_BNDRY (0xc00) are paged,
* for this scheme to work extracted higher 6 bits of the offset will be
* written to pg_sel field of PAB_CTRL register and rest of the lower 10
* bits enabled with PAGED_ADDR_BNDRY are used as offset of the register.
*/
static void mobiveil_pcie_sel_page(struct mobiveil_pcie *pcie, u8 pg_idx)
{
u32 val;
val = readl(pcie->csr_axi_slave_base + PAB_CTRL);
val &= ~(PAGE_SEL_MASK << PAGE_SEL_SHIFT);
val |= (pg_idx & PAGE_SEL_MASK) << PAGE_SEL_SHIFT;
writel(val, pcie->csr_axi_slave_base + PAB_CTRL);
}
static void *mobiveil_pcie_comp_addr(struct mobiveil_pcie *pcie, u32 off)
{
if (off < PAGED_ADDR_BNDRY) {
/* For directly accessed registers, clear the pg_sel field */
mobiveil_pcie_sel_page(pcie, 0);
return pcie->csr_axi_slave_base + off;
}
mobiveil_pcie_sel_page(pcie, OFFSET_TO_PAGE_IDX(off));
return pcie->csr_axi_slave_base + OFFSET_TO_PAGE_ADDR(off);
}
static int mobiveil_pcie_read(void __iomem *addr, int size, u32 *val)
{
if ((uintptr_t)addr & (size - 1)) {
*val = 0;
return PCIBIOS_BAD_REGISTER_NUMBER;
}
switch (size) {
case 4:
*val = readl(addr);
break;
case 2:
*val = readw(addr);
break;
case 1:
*val = readb(addr);
break;
default:
*val = 0;
return PCIBIOS_BAD_REGISTER_NUMBER;
}
return PCIBIOS_SUCCESSFUL;
}
static int mobiveil_pcie_write(void __iomem *addr, int size, u32 val)
{
if ((uintptr_t)addr & (size - 1))
return PCIBIOS_BAD_REGISTER_NUMBER;
switch (size) {
case 4:
writel(val, addr);
break;
case 2:
writew(val, addr);
break;
case 1:
writeb(val, addr);
break;
default:
return PCIBIOS_BAD_REGISTER_NUMBER;
}
return PCIBIOS_SUCCESSFUL;
}
static u32 mobiveil_csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size)
{
void *addr;
u32 val;
int ret;
addr = mobiveil_pcie_comp_addr(pcie, off);
ret = mobiveil_pcie_read(addr, size, &val);
if (ret)
dev_err(&pcie->pdev->dev, "read CSR address failed\n");
return val;
}
static void mobiveil_csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off,
size_t size)
{
void *addr;
int ret;
addr = mobiveil_pcie_comp_addr(pcie, off);
ret = mobiveil_pcie_write(addr, size, val);
if (ret)
dev_err(&pcie->pdev->dev, "write CSR address failed\n");
}
static u32 mobiveil_csr_readl(struct mobiveil_pcie *pcie, u32 off)
{
return mobiveil_csr_read(pcie, off, 0x4);
}
static void mobiveil_csr_writel(struct mobiveil_pcie *pcie, u32 val, u32 off)
{
mobiveil_csr_write(pcie, val, off, 0x4);
}
static bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie)
{
return (mobiveil_csr_readl(pcie, LTSSM_STATUS) &
LTSSM_STATUS_L0_MASK) == LTSSM_STATUS_L0;
}
#include "pcie-mobiveil.h"
static bool mobiveil_pcie_valid_device(struct pci_bus *bus, unsigned int devfn)
{
struct mobiveil_pcie *pcie = bus->sysdata;
struct mobiveil_root_port *rp = &pcie->rp;
/* Only one device down on each root port */
if ((bus->number == pcie->root_bus_nr) && (devfn > 0))
if ((bus->number == rp->root_bus_nr) && (devfn > 0))
return false;
/*
* Do not read more than one device on the bus directly
* attached to RC
*/
if ((bus->primary == pcie->root_bus_nr) && (PCI_SLOT(devfn) > 0))
if ((bus->primary == rp->root_bus_nr) && (PCI_SLOT(devfn) > 0))
return false;
return true;
@ -304,13 +54,14 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus,
unsigned int devfn, int where)
{
struct mobiveil_pcie *pcie = bus->sysdata;
struct mobiveil_root_port *rp = &pcie->rp;
u32 value;
if (!mobiveil_pcie_valid_device(bus, devfn))
return NULL;
/* RC config access */
if (bus->number == pcie->root_bus_nr)
if (bus->number == rp->root_bus_nr)
return pcie->csr_axi_slave_base + where;
/*
@ -325,7 +76,7 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus,
mobiveil_csr_writel(pcie, value, PAB_AXI_AMAP_PEX_WIN_L(WIN_NUM_0));
return pcie->config_axi_slave_base + where;
return rp->config_axi_slave_base + where;
}
static struct pci_ops mobiveil_pcie_ops = {
@ -339,7 +90,8 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
struct irq_chip *chip = irq_desc_get_chip(desc);
struct mobiveil_pcie *pcie = irq_desc_get_handler_data(desc);
struct device *dev = &pcie->pdev->dev;
struct mobiveil_msi *msi = &pcie->msi;
struct mobiveil_root_port *rp = &pcie->rp;
struct mobiveil_msi *msi = &rp->msi;
u32 msi_data, msi_addr_lo, msi_addr_hi;
u32 intr_status, msi_status;
unsigned long shifted_status;
@ -365,7 +117,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
shifted_status >>= PAB_INTX_START;
do {
for_each_set_bit(bit, &shifted_status, PCI_NUM_INTX) {
virq = irq_find_mapping(pcie->intx_domain,
virq = irq_find_mapping(rp->intx_domain,
bit + 1);
if (virq)
generic_handle_irq(virq);
@ -424,15 +176,16 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
struct device *dev = &pcie->pdev->dev;
struct platform_device *pdev = pcie->pdev;
struct device_node *node = dev->of_node;
struct mobiveil_root_port *rp = &pcie->rp;
struct resource *res;
/* map config resource */
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"config_axi_slave");
pcie->config_axi_slave_base = devm_pci_remap_cfg_resource(dev, res);
if (IS_ERR(pcie->config_axi_slave_base))
return PTR_ERR(pcie->config_axi_slave_base);
pcie->ob_io_res = res;
rp->config_axi_slave_base = devm_pci_remap_cfg_resource(dev, res);
if (IS_ERR(rp->config_axi_slave_base))
return PTR_ERR(rp->config_axi_slave_base);
rp->ob_io_res = res;
/* map csr resource */
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
@ -442,12 +195,6 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
return PTR_ERR(pcie->csr_axi_slave_base);
pcie->pcie_reg_base = res->start;
/* map MSI config resource */
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "apb_csr");
pcie->apb_csr_base = devm_pci_remap_cfg_resource(dev, res);
if (IS_ERR(pcie->apb_csr_base))
return PTR_ERR(pcie->apb_csr_base);
/* read the number of windows requested */
if (of_property_read_u32(node, "apio-wins", &pcie->apio_wins))
pcie->apio_wins = MAX_PIO_WINDOWS;
@ -455,118 +202,15 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
if (of_property_read_u32(node, "ppio-wins", &pcie->ppio_wins))
pcie->ppio_wins = MAX_PIO_WINDOWS;
pcie->irq = platform_get_irq(pdev, 0);
if (pcie->irq <= 0) {
dev_err(dev, "failed to map IRQ: %d\n", pcie->irq);
return -ENODEV;
}
return 0;
}
static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
u64 cpu_addr, u64 pci_addr, u32 type, u64 size)
{
u32 value;
u64 size64 = ~(size - 1);
if (win_num >= pcie->ppio_wins) {
dev_err(&pcie->pdev->dev,
"ERROR: max inbound windows reached !\n");
return;
}
value = mobiveil_csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
value &= ~(AMAP_CTRL_TYPE_MASK << AMAP_CTRL_TYPE_SHIFT | WIN_SIZE_MASK);
value |= type << AMAP_CTRL_TYPE_SHIFT | 1 << AMAP_CTRL_EN_SHIFT |
(lower_32_bits(size64) & WIN_SIZE_MASK);
mobiveil_csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num));
mobiveil_csr_writel(pcie, upper_32_bits(size64),
PAB_EXT_PEX_AMAP_SIZEN(win_num));
mobiveil_csr_writel(pcie, lower_32_bits(cpu_addr),
PAB_PEX_AMAP_AXI_WIN(win_num));
mobiveil_csr_writel(pcie, upper_32_bits(cpu_addr),
PAB_EXT_PEX_AMAP_AXI_WIN(win_num));
mobiveil_csr_writel(pcie, lower_32_bits(pci_addr),
PAB_PEX_AMAP_PEX_WIN_L(win_num));
mobiveil_csr_writel(pcie, upper_32_bits(pci_addr),
PAB_PEX_AMAP_PEX_WIN_H(win_num));
pcie->ib_wins_configured++;
}
/*
* routine to program the outbound windows
*/
static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
u64 cpu_addr, u64 pci_addr, u32 type, u64 size)
{
u32 value;
u64 size64 = ~(size - 1);
if (win_num >= pcie->apio_wins) {
dev_err(&pcie->pdev->dev,
"ERROR: max outbound windows reached !\n");
return;
}
/*
* program Enable Bit to 1, Type Bit to (00) base 2, AXI Window Size Bit
* to 4 KB in PAB_AXI_AMAP_CTRL register
*/
value = mobiveil_csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
value &= ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT | WIN_SIZE_MASK);
value |= 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
(lower_32_bits(size64) & WIN_SIZE_MASK);
mobiveil_csr_writel(pcie, value, PAB_AXI_AMAP_CTRL(win_num));
mobiveil_csr_writel(pcie, upper_32_bits(size64),
PAB_EXT_AXI_AMAP_SIZE(win_num));
/*
* program AXI window base with appropriate value in
* PAB_AXI_AMAP_AXI_WIN0 register
*/
mobiveil_csr_writel(pcie,
lower_32_bits(cpu_addr) & (~AXI_WINDOW_ALIGN_MASK),
PAB_AXI_AMAP_AXI_WIN(win_num));
mobiveil_csr_writel(pcie, upper_32_bits(cpu_addr),
PAB_EXT_AXI_AMAP_AXI_WIN(win_num));
mobiveil_csr_writel(pcie, lower_32_bits(pci_addr),
PAB_AXI_AMAP_PEX_WIN_L(win_num));
mobiveil_csr_writel(pcie, upper_32_bits(pci_addr),
PAB_AXI_AMAP_PEX_WIN_H(win_num));
pcie->ob_wins_configured++;
}
static int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
{
int retries;
/* check if the link is up or not */
for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
if (mobiveil_pcie_link_up(pcie))
return 0;
usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX);
}
dev_err(&pcie->pdev->dev, "link never came up\n");
return -ETIMEDOUT;
}
static void mobiveil_pcie_enable_msi(struct mobiveil_pcie *pcie)
{
phys_addr_t msg_addr = pcie->pcie_reg_base;
struct mobiveil_msi *msi = &pcie->msi;
struct mobiveil_msi *msi = &pcie->rp.msi;
pcie->msi.num_of_vectors = PCI_NUM_MSI;
msi->num_of_vectors = PCI_NUM_MSI;
msi->msi_pages_phys = (phys_addr_t)msg_addr;
writel_relaxed(lower_32_bits(msg_addr),
@ -577,17 +221,23 @@ static void mobiveil_pcie_enable_msi(struct mobiveil_pcie *pcie)
writel_relaxed(1, pcie->apb_csr_base + MSI_ENABLE_OFFSET);
}
static int mobiveil_host_init(struct mobiveil_pcie *pcie)
int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit)
{
struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
struct mobiveil_root_port *rp = &pcie->rp;
struct pci_host_bridge *bridge = rp->bridge;
u32 value, pab_ctrl, type;
struct resource_entry *win;
/* setup bus numbers */
value = mobiveil_csr_readl(pcie, PCI_PRIMARY_BUS);
value &= 0xff000000;
value |= 0x00ff0100;
mobiveil_csr_writel(pcie, value, PCI_PRIMARY_BUS);
pcie->ib_wins_configured = 0;
pcie->ob_wins_configured = 0;
if (!reinit) {
/* setup bus numbers */
value = mobiveil_csr_readl(pcie, PCI_PRIMARY_BUS);
value &= 0xff000000;
value |= 0x00ff0100;
mobiveil_csr_writel(pcie, value, PCI_PRIMARY_BUS);
}
/*
* program Bus Master Enable Bit in Command Register in PAB Config
@ -605,9 +255,6 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
pab_ctrl |= (1 << AMBA_PIO_ENABLE_SHIFT) | (1 << PEX_PIO_ENABLE_SHIFT);
mobiveil_csr_writel(pcie, pab_ctrl, PAB_CTRL);
mobiveil_csr_writel(pcie, (PAB_INTP_INTX_MASK | PAB_INTP_MSI_MASK),
PAB_INTP_AMBA_MISC_ENB);
/*
* program PIO Enable Bit to 1 and Config Window Enable Bit to 1 in
* PAB_AXI_PIO_CTRL Register
@ -629,8 +276,8 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
*/
/* config outbound translation window */
program_ob_windows(pcie, WIN_NUM_0, pcie->ob_io_res->start, 0,
CFG_WINDOW_TYPE, resource_size(pcie->ob_io_res));
program_ob_windows(pcie, WIN_NUM_0, rp->ob_io_res->start, 0,
CFG_WINDOW_TYPE, resource_size(rp->ob_io_res));
/* memory inbound translation window */
program_ib_windows(pcie, WIN_NUM_0, 0, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
@ -657,9 +304,6 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
value |= (PCI_CLASS_BRIDGE_PCI << 16);
mobiveil_csr_writel(pcie, value, PAB_INTP_AXI_PIO_CLASS);
/* setup MSI hardware registers */
mobiveil_pcie_enable_msi(pcie);
return 0;
}
@ -667,32 +311,36 @@ static void mobiveil_mask_intx_irq(struct irq_data *data)
{
struct irq_desc *desc = irq_to_desc(data->irq);
struct mobiveil_pcie *pcie;
struct mobiveil_root_port *rp;
unsigned long flags;
u32 mask, shifted_val;
pcie = irq_desc_get_chip_data(desc);
rp = &pcie->rp;
mask = 1 << ((data->hwirq + PAB_INTX_START) - 1);
raw_spin_lock_irqsave(&pcie->intx_mask_lock, flags);
raw_spin_lock_irqsave(&rp->intx_mask_lock, flags);
shifted_val = mobiveil_csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
shifted_val &= ~mask;
mobiveil_csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB);
raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags);
raw_spin_unlock_irqrestore(&rp->intx_mask_lock, flags);
}
static void mobiveil_unmask_intx_irq(struct irq_data *data)
{
struct irq_desc *desc = irq_to_desc(data->irq);
struct mobiveil_pcie *pcie;
struct mobiveil_root_port *rp;
unsigned long flags;
u32 shifted_val, mask;
pcie = irq_desc_get_chip_data(desc);
rp = &pcie->rp;
mask = 1 << ((data->hwirq + PAB_INTX_START) - 1);
raw_spin_lock_irqsave(&pcie->intx_mask_lock, flags);
raw_spin_lock_irqsave(&rp->intx_mask_lock, flags);
shifted_val = mobiveil_csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
shifted_val |= mask;
mobiveil_csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB);
raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags);
raw_spin_unlock_irqrestore(&rp->intx_mask_lock, flags);
}
static struct irq_chip intx_irq_chip = {
@ -760,7 +408,7 @@ static int mobiveil_irq_msi_domain_alloc(struct irq_domain *domain,
unsigned int nr_irqs, void *args)
{
struct mobiveil_pcie *pcie = domain->host_data;
struct mobiveil_msi *msi = &pcie->msi;
struct mobiveil_msi *msi = &pcie->rp.msi;
unsigned long bit;
WARN_ON(nr_irqs != 1);
@ -787,7 +435,7 @@ static void mobiveil_irq_msi_domain_free(struct irq_domain *domain,
{
struct irq_data *d = irq_domain_get_irq_data(domain, virq);
struct mobiveil_pcie *pcie = irq_data_get_irq_chip_data(d);
struct mobiveil_msi *msi = &pcie->msi;
struct mobiveil_msi *msi = &pcie->rp.msi;
mutex_lock(&msi->lock);
@ -808,9 +456,9 @@ static int mobiveil_allocate_msi_domains(struct mobiveil_pcie *pcie)
{
struct device *dev = &pcie->pdev->dev;
struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
struct mobiveil_msi *msi = &pcie->msi;
struct mobiveil_msi *msi = &pcie->rp.msi;
mutex_init(&pcie->msi.lock);
mutex_init(&msi->lock);
msi->dev_domain = irq_domain_add_linear(NULL, msi->num_of_vectors,
&msi_domain_ops, pcie);
if (!msi->dev_domain) {
@ -834,18 +482,19 @@ static int mobiveil_pcie_init_irq_domain(struct mobiveil_pcie *pcie)
{
struct device *dev = &pcie->pdev->dev;
struct device_node *node = dev->of_node;
struct mobiveil_root_port *rp = &pcie->rp;
int ret;
/* setup INTx */
pcie->intx_domain = irq_domain_add_linear(node, PCI_NUM_INTX,
&intx_domain_ops, pcie);
rp->intx_domain = irq_domain_add_linear(node, PCI_NUM_INTX,
&intx_domain_ops, pcie);
if (!pcie->intx_domain) {
if (!rp->intx_domain) {
dev_err(dev, "Failed to get a INTx IRQ domain\n");
return -ENOMEM;
}
raw_spin_lock_init(&pcie->intx_mask_lock);
raw_spin_lock_init(&rp->intx_mask_lock);
/* setup MSI */
ret = mobiveil_allocate_msi_domains(pcie);
@ -855,23 +504,74 @@ static int mobiveil_pcie_init_irq_domain(struct mobiveil_pcie *pcie)
return 0;
}
static int mobiveil_pcie_probe(struct platform_device *pdev)
static int mobiveil_pcie_integrated_interrupt_init(struct mobiveil_pcie *pcie)
{
struct mobiveil_pcie *pcie;
struct pci_bus *bus;
struct pci_bus *child;
struct pci_host_bridge *bridge;
struct platform_device *pdev = pcie->pdev;
struct device *dev = &pdev->dev;
struct mobiveil_root_port *rp = &pcie->rp;
struct resource *res;
int ret;
/* allocate the PCIe port */
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
if (!bridge)
return -ENOMEM;
/* map MSI config resource */
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "apb_csr");
pcie->apb_csr_base = devm_pci_remap_cfg_resource(dev, res);
if (IS_ERR(pcie->apb_csr_base))
return PTR_ERR(pcie->apb_csr_base);
pcie = pci_host_bridge_priv(bridge);
/* setup MSI hardware registers */
mobiveil_pcie_enable_msi(pcie);
pcie->pdev = pdev;
rp->irq = platform_get_irq(pdev, 0);
if (rp->irq <= 0) {
dev_err(dev, "failed to map IRQ: %d\n", rp->irq);
return -ENODEV;
}
/* initialize the IRQ domains */
ret = mobiveil_pcie_init_irq_domain(pcie);
if (ret) {
dev_err(dev, "Failed creating IRQ Domain\n");
return ret;
}
irq_set_chained_handler_and_data(rp->irq, mobiveil_pcie_isr, pcie);
/* Enable interrupts */
mobiveil_csr_writel(pcie, (PAB_INTP_INTX_MASK | PAB_INTP_MSI_MASK),
PAB_INTP_AMBA_MISC_ENB);
return 0;
}
static int mobiveil_pcie_interrupt_init(struct mobiveil_pcie *pcie)
{
struct mobiveil_root_port *rp = &pcie->rp;
if (rp->ops->interrupt_init)
return rp->ops->interrupt_init(pcie);
return mobiveil_pcie_integrated_interrupt_init(pcie);
}
static bool mobiveil_pcie_is_bridge(struct mobiveil_pcie *pcie)
{
u32 header_type;
header_type = mobiveil_csr_readb(pcie, PCI_HEADER_TYPE);
header_type &= 0x7f;
return header_type == PCI_HEADER_TYPE_BRIDGE;
}
int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie)
{
struct mobiveil_root_port *rp = &pcie->rp;
struct pci_host_bridge *bridge = rp->bridge;
struct device *dev = &pcie->pdev->dev;
struct pci_bus *bus;
struct pci_bus *child;
int ret;
ret = mobiveil_pcie_parse_dt(pcie);
if (ret) {
@ -879,6 +579,9 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
return ret;
}
if (!mobiveil_pcie_is_bridge(pcie))
return -ENODEV;
/* parse the host bridge base addresses from the device tree file */
ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
&bridge->dma_ranges, NULL);
@ -891,25 +594,22 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
* configure all inbound and outbound windows and prepare the RC for
* config access
*/
ret = mobiveil_host_init(pcie);
ret = mobiveil_host_init(pcie, false);
if (ret) {
dev_err(dev, "Failed to initialize host\n");
return ret;
}
/* initialize the IRQ domains */
ret = mobiveil_pcie_init_irq_domain(pcie);
ret = mobiveil_pcie_interrupt_init(pcie);
if (ret) {
dev_err(dev, "Failed creating IRQ Domain\n");
dev_err(dev, "Interrupt init failed\n");
return ret;
}
irq_set_chained_handler_and_data(pcie->irq, mobiveil_pcie_isr, pcie);
/* Initialize bridge */
bridge->dev.parent = dev;
bridge->sysdata = pcie;
bridge->busnr = pcie->root_bus_nr;
bridge->busnr = rp->root_bus_nr;
bridge->ops = &mobiveil_pcie_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
@ -934,25 +634,3 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
return 0;
}
static const struct of_device_id mobiveil_pcie_of_match[] = {
{.compatible = "mbvl,gpex40-pcie",},
{},
};
MODULE_DEVICE_TABLE(of, mobiveil_pcie_of_match);
static struct platform_driver mobiveil_pcie_driver = {
.probe = mobiveil_pcie_probe,
.driver = {
.name = "mobiveil-pcie",
.of_match_table = mobiveil_pcie_of_match,
.suppress_bind_attrs = true,
},
};
builtin_platform_driver(mobiveil_pcie_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Mobiveil PCIe host controller driver");
MODULE_AUTHOR("Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>");

61
drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c Normal file
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@ -0,0 +1,61 @@
// SPDX-License-Identifier: GPL-2.0
/*
* PCIe host controller driver for Mobiveil PCIe Host controller
*
* Copyright (c) 2018 Mobiveil Inc.
* Copyright 2019 NXP
*
* Author: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
* Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_pci.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include "pcie-mobiveil.h"
static int mobiveil_pcie_probe(struct platform_device *pdev)
{
struct mobiveil_pcie *pcie;
struct pci_host_bridge *bridge;
struct device *dev = &pdev->dev;
/* allocate the PCIe port */
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
if (!bridge)
return -ENOMEM;
pcie = pci_host_bridge_priv(bridge);
pcie->rp.bridge = bridge;
pcie->pdev = pdev;
return mobiveil_pcie_host_probe(pcie);
}
static const struct of_device_id mobiveil_pcie_of_match[] = {
{.compatible = "mbvl,gpex40-pcie",},
{},
};
MODULE_DEVICE_TABLE(of, mobiveil_pcie_of_match);
static struct platform_driver mobiveil_pcie_driver = {
.probe = mobiveil_pcie_probe,
.driver = {
.name = "mobiveil-pcie",
.of_match_table = mobiveil_pcie_of_match,
.suppress_bind_attrs = true,
},
};
builtin_platform_driver(mobiveil_pcie_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Mobiveil PCIe host controller driver");
MODULE_AUTHOR("Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>");

231
drivers/pci/controller/mobiveil/pcie-mobiveil.c Normal file
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@ -0,0 +1,231 @@
// SPDX-License-Identifier: GPL-2.0
/*
* PCIe host controller driver for Mobiveil PCIe Host controller
*
* Copyright (c) 2018 Mobiveil Inc.
* Copyright 2019 NXP
*
* Author: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
* Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
*/
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include "pcie-mobiveil.h"
/*
* mobiveil_pcie_sel_page - routine to access paged register
*
* Registers whose address greater than PAGED_ADDR_BNDRY (0xc00) are paged,
* for this scheme to work extracted higher 6 bits of the offset will be
* written to pg_sel field of PAB_CTRL register and rest of the lower 10
* bits enabled with PAGED_ADDR_BNDRY are used as offset of the register.
*/
static void mobiveil_pcie_sel_page(struct mobiveil_pcie *pcie, u8 pg_idx)
{
u32 val;
val = readl(pcie->csr_axi_slave_base + PAB_CTRL);
val &= ~(PAGE_SEL_MASK << PAGE_SEL_SHIFT);
val |= (pg_idx & PAGE_SEL_MASK) << PAGE_SEL_SHIFT;
writel(val, pcie->csr_axi_slave_base + PAB_CTRL);
}
static void __iomem *mobiveil_pcie_comp_addr(struct mobiveil_pcie *pcie,
u32 off)
{
if (off < PAGED_ADDR_BNDRY) {
/* For directly accessed registers, clear the pg_sel field */
mobiveil_pcie_sel_page(pcie, 0);
return pcie->csr_axi_slave_base + off;
}
mobiveil_pcie_sel_page(pcie, OFFSET_TO_PAGE_IDX(off));
return pcie->csr_axi_slave_base + OFFSET_TO_PAGE_ADDR(off);
}
static int mobiveil_pcie_read(void __iomem *addr, int size, u32 *val)
{
if ((uintptr_t)addr & (size - 1)) {
*val = 0;
return PCIBIOS_BAD_REGISTER_NUMBER;
}
switch (size) {
case 4:
*val = readl(addr);
break;
case 2:
*val = readw(addr);
break;
case 1:
*val = readb(addr);
break;
default:
*val = 0;
return PCIBIOS_BAD_REGISTER_NUMBER;
}
return PCIBIOS_SUCCESSFUL;
}
static int mobiveil_pcie_write(void __iomem *addr, int size, u32 val)
{
if ((uintptr_t)addr & (size - 1))
return PCIBIOS_BAD_REGISTER_NUMBER;
switch (size) {
case 4:
writel(val, addr);
break;
case 2:
writew(val, addr);
break;
case 1:
writeb(val, addr);
break;
default:
return PCIBIOS_BAD_REGISTER_NUMBER;
}
return PCIBIOS_SUCCESSFUL;
}
u32 mobiveil_csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size)
{
void __iomem *addr;
u32 val;
int ret;
addr = mobiveil_pcie_comp_addr(pcie, off);
ret = mobiveil_pcie_read(addr, size, &val);
if (ret)
dev_err(&pcie->pdev->dev, "read CSR address failed\n");
return val;
}
void mobiveil_csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off,
size_t size)
{
void __iomem *addr;
int ret;
addr = mobiveil_pcie_comp_addr(pcie, off);
ret = mobiveil_pcie_write(addr, size, val);
if (ret)
dev_err(&pcie->pdev->dev, "write CSR address failed\n");
}
bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie)
{
if (pcie->ops->link_up)
return pcie->ops->link_up(pcie);
return (mobiveil_csr_readl(pcie, LTSSM_STATUS) &
LTSSM_STATUS_L0_MASK) == LTSSM_STATUS_L0;
}
void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
u64 cpu_addr, u64 pci_addr, u32 type, u64 size)
{
u32 value;
u64 size64 = ~(size - 1);
if (win_num >= pcie->ppio_wins) {
dev_err(&pcie->pdev->dev,
"ERROR: max inbound windows reached !\n");
return;
}
value = mobiveil_csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
value &= ~(AMAP_CTRL_TYPE_MASK << AMAP_CTRL_TYPE_SHIFT | WIN_SIZE_MASK);
value |= type << AMAP_CTRL_TYPE_SHIFT | 1 << AMAP_CTRL_EN_SHIFT |
(lower_32_bits(size64) & WIN_SIZE_MASK);
mobiveil_csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num));
mobiveil_csr_writel(pcie, upper_32_bits(size64),
PAB_EXT_PEX_AMAP_SIZEN(win_num));
mobiveil_csr_writel(pcie, lower_32_bits(cpu_addr),
PAB_PEX_AMAP_AXI_WIN(win_num));
mobiveil_csr_writel(pcie, upper_32_bits(cpu_addr),
PAB_EXT_PEX_AMAP_AXI_WIN(win_num));
mobiveil_csr_writel(pcie, lower_32_bits(pci_addr),
PAB_PEX_AMAP_PEX_WIN_L(win_num));
mobiveil_csr_writel(pcie, upper_32_bits(pci_addr),
PAB_PEX_AMAP_PEX_WIN_H(win_num));
pcie->ib_wins_configured++;
}
/*
* routine to program the outbound windows
*/
void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
u64 cpu_addr, u64 pci_addr, u32 type, u64 size)
{
u32 value;
u64 size64 = ~(size - 1);
if (win_num >= pcie->apio_wins) {
dev_err(&pcie->pdev->dev,
"ERROR: max outbound windows reached !\n");
return;
}
/*
* program Enable Bit to 1, Type Bit to (00) base 2, AXI Window Size Bit
* to 4 KB in PAB_AXI_AMAP_CTRL register
*/
value = mobiveil_csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
value &= ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT | WIN_SIZE_MASK);
value |= 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
(lower_32_bits(size64) & WIN_SIZE_MASK);
mobiveil_csr_writel(pcie, value, PAB_AXI_AMAP_CTRL(win_num));
mobiveil_csr_writel(pcie, upper_32_bits(size64),
PAB_EXT_AXI_AMAP_SIZE(win_num));
/*
* program AXI window base with appropriate value in
* PAB_AXI_AMAP_AXI_WIN0 register
*/
mobiveil_csr_writel(pcie,
lower_32_bits(cpu_addr) & (~AXI_WINDOW_ALIGN_MASK),
PAB_AXI_AMAP_AXI_WIN(win_num));
mobiveil_csr_writel(pcie, upper_32_bits(cpu_addr),
PAB_EXT_AXI_AMAP_AXI_WIN(win_num));
mobiveil_csr_writel(pcie, lower_32_bits(pci_addr),
PAB_AXI_AMAP_PEX_WIN_L(win_num));
mobiveil_csr_writel(pcie, upper_32_bits(pci_addr),
PAB_AXI_AMAP_PEX_WIN_H(win_num));
pcie->ob_wins_configured++;
}
int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
{
int retries;
/* check if the link is up or not */
for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
if (mobiveil_pcie_link_up(pcie))
return 0;
usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX);
}
dev_err(&pcie->pdev->dev, "link never came up\n");
return -ETIMEDOUT;
}

226
drivers/pci/controller/mobiveil/pcie-mobiveil.h Normal file
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@ -0,0 +1,226 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* PCIe host controller driver for Mobiveil PCIe Host controller
*
* Copyright (c) 2018 Mobiveil Inc.
* Copyright 2019 NXP
*
* Author: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
* Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
*/
#ifndef _PCIE_MOBIVEIL_H
#define _PCIE_MOBIVEIL_H
#include <linux/pci.h>
#include <linux/irq.h>
#include <linux/msi.h>
#include "../../pci.h"
/* register offsets and bit positions */
/*
* translation tables are grouped into windows, each window registers are
* grouped into blocks of 4 or 16 registers each
*/
#define PAB_REG_BLOCK_SIZE 16
#define PAB_EXT_REG_BLOCK_SIZE 4
#define PAB_REG_ADDR(offset, win) \
(offset + (win * PAB_REG_BLOCK_SIZE))
#define PAB_EXT_REG_ADDR(offset, win) \
(offset + (win * PAB_EXT_REG_BLOCK_SIZE))
#define LTSSM_STATUS 0x0404
#define LTSSM_STATUS_L0_MASK 0x3f
#define LTSSM_STATUS_L0 0x2d
#define PAB_CTRL 0x0808
#define AMBA_PIO_ENABLE_SHIFT 0
#define PEX_PIO_ENABLE_SHIFT 1
#define PAGE_SEL_SHIFT 13
#define PAGE_SEL_MASK 0x3f
#define PAGE_LO_MASK 0x3ff
#define PAGE_SEL_OFFSET_SHIFT 10
#define PAB_ACTIVITY_STAT 0x81c
#define PAB_AXI_PIO_CTRL 0x0840
#define APIO_EN_MASK 0xf
#define PAB_PEX_PIO_CTRL 0x08c0
#define PIO_ENABLE_SHIFT 0
#define PAB_INTP_AMBA_MISC_ENB 0x0b0c
#define PAB_INTP_AMBA_MISC_STAT 0x0b1c
#define PAB_INTP_RESET BIT(1)
#define PAB_INTP_MSI BIT(3)
#define PAB_INTP_INTA BIT(5)
#define PAB_INTP_INTB BIT(6)
#define PAB_INTP_INTC BIT(7)
#define PAB_INTP_INTD BIT(8)
#define PAB_INTP_PCIE_UE BIT(9)
#define PAB_INTP_IE_PMREDI BIT(29)
#define PAB_INTP_IE_EC BIT(30)
#define PAB_INTP_MSI_MASK PAB_INTP_MSI
#define PAB_INTP_INTX_MASK (PAB_INTP_INTA | PAB_INTP_INTB |\
PAB_INTP_INTC | PAB_INTP_INTD)
#define PAB_AXI_AMAP_CTRL(win) PAB_REG_ADDR(0x0ba0, win)
#define WIN_ENABLE_SHIFT 0
#define WIN_TYPE_SHIFT 1
#define WIN_TYPE_MASK 0x3
#define WIN_SIZE_MASK 0xfffffc00
#define PAB_EXT_AXI_AMAP_SIZE(win) PAB_EXT_REG_ADDR(0xbaf0, win)
#define PAB_EXT_AXI_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0x80a0, win)
#define PAB_AXI_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x0ba4, win)
#define AXI_WINDOW_ALIGN_MASK 3
#define PAB_AXI_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x0ba8, win)
#define PAB_BUS_SHIFT 24
#define PAB_DEVICE_SHIFT 19
#define PAB_FUNCTION_SHIFT 16
#define PAB_AXI_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x0bac, win)
#define PAB_INTP_AXI_PIO_CLASS 0x474
#define PAB_PEX_AMAP_CTRL(win) PAB_REG_ADDR(0x4ba0, win)
#define AMAP_CTRL_EN_SHIFT 0
#define AMAP_CTRL_TYPE_SHIFT 1
#define AMAP_CTRL_TYPE_MASK 3
#define PAB_EXT_PEX_AMAP_SIZEN(win) PAB_EXT_REG_ADDR(0xbef0, win)
#define PAB_EXT_PEX_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0xb4a0, win)
#define PAB_PEX_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x4ba4, win)
#define PAB_PEX_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x4ba8, win)
#define PAB_PEX_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x4bac, win)
/* starting offset of INTX bits in status register */
#define PAB_INTX_START 5
/* supported number of MSI interrupts */
#define PCI_NUM_MSI 16
/* MSI registers */
#define MSI_BASE_LO_OFFSET 0x04
#define MSI_BASE_HI_OFFSET 0x08
#define MSI_SIZE_OFFSET 0x0c
#define MSI_ENABLE_OFFSET 0x14
#define MSI_STATUS_OFFSET 0x18
#define MSI_DATA_OFFSET 0x20
#define MSI_ADDR_L_OFFSET 0x24
#define MSI_ADDR_H_OFFSET 0x28
/* outbound and inbound window definitions */
#define WIN_NUM_0 0
#define WIN_NUM_1 1
#define CFG_WINDOW_TYPE 0
#define IO_WINDOW_TYPE 1
#define MEM_WINDOW_TYPE 2
#define IB_WIN_SIZE ((u64)256 * 1024 * 1024 * 1024)
#define MAX_PIO_WINDOWS 8
/* Parameters for the waiting for link up routine */
#define LINK_WAIT_MAX_RETRIES 10
#define LINK_WAIT_MIN 90000
#define LINK_WAIT_MAX 100000
#define PAGED_ADDR_BNDRY 0xc00
#define OFFSET_TO_PAGE_ADDR(off) \
((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY)
#define OFFSET_TO_PAGE_IDX(off) \
((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK)
struct mobiveil_msi { /* MSI information */
struct mutex lock; /* protect bitmap variable */
struct irq_domain *msi_domain;
struct irq_domain *dev_domain;
phys_addr_t msi_pages_phys;
int num_of_vectors;
DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI);
};
struct mobiveil_pcie;
struct mobiveil_rp_ops {
int (*interrupt_init)(struct mobiveil_pcie *pcie);
};
struct mobiveil_root_port {
char root_bus_nr;
void __iomem *config_axi_slave_base; /* endpoint config base */
struct resource *ob_io_res;
struct mobiveil_rp_ops *ops;
int irq;
raw_spinlock_t intx_mask_lock;
struct irq_domain *intx_domain;
struct mobiveil_msi msi;
struct pci_host_bridge *bridge;
};
struct mobiveil_pab_ops {
int (*link_up)(struct mobiveil_pcie *pcie);
};
struct mobiveil_pcie {
struct platform_device *pdev;
void __iomem *csr_axi_slave_base; /* root port config base */
void __iomem *apb_csr_base; /* MSI register base */
phys_addr_t pcie_reg_base; /* Physical PCIe Controller Base */
int apio_wins;
int ppio_wins;
int ob_wins_configured; /* configured outbound windows */
int ib_wins_configured; /* configured inbound windows */
const struct mobiveil_pab_ops *ops;
struct mobiveil_root_port rp;
};
int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie);
int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit);
bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie);
int mobiveil_bringup_link(struct mobiveil_pcie *pcie);
void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
u64 pci_addr, u32 type, u64 size);
void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
u64 pci_addr, u32 type, u64 size);
u32 mobiveil_csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size);
void mobiveil_csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off,
size_t size);
static inline u32 mobiveil_csr_readl(struct mobiveil_pcie *pcie, u32 off)
{
return mobiveil_csr_read(pcie, off, 0x4);
}
static inline u16 mobiveil_csr_readw(struct mobiveil_pcie *pcie, u32 off)
{
return mobiveil_csr_read(pcie, off, 0x2);
}
static inline u8 mobiveil_csr_readb(struct mobiveil_pcie *pcie, u32 off)
{
return mobiveil_csr_read(pcie, off, 0x1);
}
static inline void mobiveil_csr_writel(struct mobiveil_pcie *pcie, u32 val,
u32 off)
{
mobiveil_csr_write(pcie, val, off, 0x4);
}
static inline void mobiveil_csr_writew(struct mobiveil_pcie *pcie, u16 val,
u32 off)
{
mobiveil_csr_write(pcie, val, off, 0x2);
}
static inline void mobiveil_csr_writeb(struct mobiveil_pcie *pcie, u8 val,
u32 off)
{
mobiveil_csr_write(pcie, val, off, 0x1);
}
#endif /* _PCIE_MOBIVEIL_H */

260
drivers/pci/controller/pci-hyperv.c
View File

@ -63,6 +63,7 @@
enum pci_protocol_version_t {
PCI_PROTOCOL_VERSION_1_1 = PCI_MAKE_VERSION(1, 1), /* Win10 */
PCI_PROTOCOL_VERSION_1_2 = PCI_MAKE_VERSION(1, 2), /* RS1 */
PCI_PROTOCOL_VERSION_1_3 = PCI_MAKE_VERSION(1, 3), /* Vibranium */
};
#define CPU_AFFINITY_ALL -1ULL
@ -72,6 +73,7 @@ enum pci_protocol_version_t {
* first.
*/
static enum pci_protocol_version_t pci_protocol_versions[] = {
PCI_PROTOCOL_VERSION_1_3,
PCI_PROTOCOL_VERSION_1_2,
PCI_PROTOCOL_VERSION_1_1,
};
@ -119,6 +121,7 @@ enum pci_message_type {
PCI_RESOURCES_ASSIGNED2 = PCI_MESSAGE_BASE + 0x16,
PCI_CREATE_INTERRUPT_MESSAGE2 = PCI_MESSAGE_BASE + 0x17,
PCI_DELETE_INTERRUPT_MESSAGE2 = PCI_MESSAGE_BASE + 0x18, /* unused */
PCI_BUS_RELATIONS2 = PCI_MESSAGE_BASE + 0x19,
PCI_MESSAGE_MAXIMUM
};
@ -164,6 +167,26 @@ struct pci_function_description {
u32 ser; /* serial number */
} __packed;
enum pci_device_description_flags {
HV_PCI_DEVICE_FLAG_NONE = 0x0,
HV_PCI_DEVICE_FLAG_NUMA_AFFINITY = 0x1,
};
struct pci_function_description2 {
u16 v_id; /* vendor ID */
u16 d_id; /* device ID */
u8 rev;
u8 prog_intf;
u8 subclass;
u8 base_class;
u32 subsystem_id;
union win_slot_encoding win_slot;
u32 ser; /* serial number */
u32 flags;
u16 virtual_numa_node;
u16 reserved;
} __packed;
/**
* struct hv_msi_desc
* @vector: IDT entry
@ -260,7 +283,7 @@ struct pci_packet {
int resp_packet_size);
void *compl_ctxt;
struct pci_message message[0];
struct pci_message message[];
};
/*
@ -296,7 +319,13 @@ struct pci_bus_d0_entry {
struct pci_bus_relations {
struct pci_incoming_message incoming;
u32 device_count;
struct pci_function_description func[0];
struct pci_function_description func[];
} __packed;
struct pci_bus_relations2 {
struct pci_incoming_message incoming;
u32 device_count;
struct pci_function_description2 func[];
} __packed;
struct pci_q_res_req_response {
@ -406,42 +435,6 @@ struct pci_eject_response {
static int pci_ring_size = (4 * PAGE_SIZE);
/*
* Definitions or interrupt steering hypercall.
*/
#define HV_PARTITION_ID_SELF ((u64)-1)
#define HVCALL_RETARGET_INTERRUPT 0x7e
struct hv_interrupt_entry {
u32 source; /* 1 for MSI(-X) */
u32 reserved1;
u32 address;
u32 data;
};
/*
* flags for hv_device_interrupt_target.flags
*/
#define HV_DEVICE_INTERRUPT_TARGET_MULTICAST 1
#define HV_DEVICE_INTERRUPT_TARGET_PROCESSOR_SET 2
struct hv_device_interrupt_target {
u32 vector;
u32 flags;
union {
u64 vp_mask;
struct hv_vpset vp_set;
};
};
struct retarget_msi_interrupt {
u64 partition_id; /* use "self" */
u64 device_id;
struct hv_interrupt_entry int_entry;
u64 reserved2;
struct hv_device_interrupt_target int_target;
} __packed __aligned(8);
/*
* Driver specific state.
*/
@ -488,7 +481,7 @@ struct hv_pcibus_device {
struct workqueue_struct *wq;
/* hypercall arg, must not cross page boundary */
struct retarget_msi_interrupt retarget_msi_interrupt_params;
struct hv_retarget_device_interrupt retarget_msi_interrupt_params;
/*
* Don't put anything here: retarget_msi_interrupt_params must be last
@ -505,10 +498,24 @@ struct hv_dr_work {
struct hv_pcibus_device *bus;
};
struct hv_pcidev_description {
u16 v_id; /* vendor ID */
u16 d_id; /* device ID */
u8 rev;
u8 prog_intf;
u8 subclass;
u8 base_class;
u32 subsystem_id;
union win_slot_encoding win_slot;
u32 ser; /* serial number */
u32 flags;
u16 virtual_numa_node;
};
struct hv_dr_state {
struct list_head list_entry;
u32 device_count;
struct pci_function_description func[0];
struct hv_pcidev_description func[];
};
enum hv_pcichild_state {
@ -525,7 +532,7 @@ struct hv_pci_dev {
refcount_t refs;
enum hv_pcichild_state state;
struct pci_slot *pci_slot;
struct pci_function_description desc;
struct hv_pcidev_description desc;
bool reported_missing;
struct hv_pcibus_device *hbus;
struct work_struct wrk;
@ -1184,7 +1191,7 @@ static void hv_irq_unmask(struct irq_data *data)
{
struct msi_desc *msi_desc = irq_data_get_msi_desc(data);
struct irq_cfg *cfg = irqd_cfg(data);
struct retarget_msi_interrupt *params;
struct hv_retarget_device_interrupt *params;
struct hv_pcibus_device *hbus;
struct cpumask *dest;
cpumask_var_t tmp;
@ -1206,8 +1213,7 @@ static void hv_irq_unmask(struct irq_data *data)
memset(params, 0, sizeof(*params));
params->partition_id = HV_PARTITION_ID_SELF;
params->int_entry.source = 1; /* MSI(-X) */
params->int_entry.address = msi_desc->msg.address_lo;
params->int_entry.data = msi_desc->msg.data;
hv_set_msi_entry_from_desc(&params->int_entry.msi_entry, msi_desc);
params->device_id = (hbus->hdev->dev_instance.b[5] << 24) |
(hbus->hdev->dev_instance.b[4] << 16) |
(hbus->hdev->dev_instance.b[7] << 8) |
@ -1401,6 +1407,7 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
break;
case PCI_PROTOCOL_VERSION_1_2:
case PCI_PROTOCOL_VERSION_1_3:
size = hv_compose_msi_req_v2(&ctxt.int_pkts.v2,
dest,
hpdev->desc.win_slot.slot,
@ -1799,6 +1806,27 @@ static void hv_pci_remove_slots(struct hv_pcibus_device *hbus)
}
}
/*
* Set NUMA node for the devices on the bus
*/
static void hv_pci_assign_numa_node(struct hv_pcibus_device *hbus)
{
struct pci_dev *dev;
struct pci_bus *bus = hbus->pci_bus;
struct hv_pci_dev *hv_dev;
list_for_each_entry(dev, &bus->devices, bus_list) {
hv_dev = get_pcichild_wslot(hbus, devfn_to_wslot(dev->devfn));
if (!hv_dev)
continue;
if (hv_dev->desc.flags & HV_PCI_DEVICE_FLAG_NUMA_AFFINITY)
set_dev_node(&dev->dev, hv_dev->desc.virtual_numa_node);
put_pcichild(hv_dev);
}
}
/**
* create_root_hv_pci_bus() - Expose a new root PCI bus
* @hbus: Root PCI bus, as understood by this driver
@ -1821,6 +1849,7 @@ static int create_root_hv_pci_bus(struct hv_pcibus_device *hbus)
pci_lock_rescan_remove();
pci_scan_child_bus(hbus->pci_bus);
hv_pci_assign_numa_node(hbus);
pci_bus_assign_resources(hbus->pci_bus);
hv_pci_assign_slots(hbus);
pci_bus_add_devices(hbus->pci_bus);
@ -1877,7 +1906,7 @@ static void q_resource_requirements(void *context, struct pci_response *resp,
* Return: Pointer to the new tracking struct
*/
static struct hv_pci_dev *new_pcichild_device(struct hv_pcibus_device *hbus,
struct pci_function_description *desc)
struct hv_pcidev_description *desc)
{
struct hv_pci_dev *hpdev;
struct pci_child_message *res_req;
@ -1988,7 +2017,7 @@ static void pci_devices_present_work(struct work_struct *work)
{
u32 child_no;
bool found;
struct pci_function_description *new_desc;
struct hv_pcidev_description *new_desc;
struct hv_pci_dev *hpdev;
struct hv_pcibus_device *hbus;
struct list_head removed;
@ -2089,6 +2118,7 @@ static void pci_devices_present_work(struct work_struct *work)
*/
pci_lock_rescan_remove();
pci_scan_child_bus(hbus->pci_bus);
hv_pci_assign_numa_node(hbus);
hv_pci_assign_slots(hbus);
pci_unlock_rescan_remove();
break;
@ -2107,17 +2137,15 @@ static void pci_devices_present_work(struct work_struct *work)
}
/**
* hv_pci_devices_present() - Handles list of new children
* hv_pci_start_relations_work() - Queue work to start device discovery
* @hbus: Root PCI bus, as understood by this driver
* @relations: Packet from host listing children
* @dr: The list of children returned from host
*
* This function is invoked whenever a new list of devices for
* this bus appears.
* Return: 0 on success, -errno on failure
*/
static void hv_pci_devices_present(struct hv_pcibus_device *hbus,
struct pci_bus_relations *relations)
static int hv_pci_start_relations_work(struct hv_pcibus_device *hbus,
struct hv_dr_state *dr)
{
struct hv_dr_state *dr;
struct hv_dr_work *dr_wrk;
unsigned long flags;
bool pending_dr;
@ -2125,29 +2153,15 @@ static void hv_pci_devices_present(struct hv_pcibus_device *hbus,
if (hbus->state == hv_pcibus_removing) {
dev_info(&hbus->hdev->device,
"PCI VMBus BUS_RELATIONS: ignored\n");
return;
return -ENOENT;
}
dr_wrk = kzalloc(sizeof(*dr_wrk), GFP_NOWAIT);
if (!dr_wrk)
return;
dr = kzalloc(offsetof(struct hv_dr_state, func) +
(sizeof(struct pci_function_description) *
(relations->device_count)), GFP_NOWAIT);
if (!dr) {
kfree(dr_wrk);
return;
}
return -ENOMEM;
INIT_WORK(&dr_wrk->wrk, pci_devices_present_work);
dr_wrk->bus = hbus;
dr->device_count = relations->device_count;
if (dr->device_count != 0) {
memcpy(dr->func, relations->func,
sizeof(struct pci_function_description) *
dr->device_count);
}
spin_lock_irqsave(&hbus->device_list_lock, flags);
/*
@ -2165,6 +2179,87 @@ static void hv_pci_devices_present(struct hv_pcibus_device *hbus,
get_hvpcibus(hbus);
queue_work(hbus->wq, &dr_wrk->wrk);
}
return 0;
}
/**
* hv_pci_devices_present() - Handle list of new children
* @hbus: Root PCI bus, as understood by this driver
* @relations: Packet from host listing children
*
* Process a new list of devices on the bus. The list of devices is
* discovered by VSP and sent to us via VSP message PCI_BUS_RELATIONS,
* whenever a new list of devices for this bus appears.
*/
static void hv_pci_devices_present(struct hv_pcibus_device *hbus,
struct pci_bus_relations *relations)
{
struct hv_dr_state *dr;
int i;
dr = kzalloc(offsetof(struct hv_dr_state, func) +
(sizeof(struct hv_pcidev_description) *
(relations->device_count)), GFP_NOWAIT);
if (!dr)
return;
dr->device_count = relations->device_count;
for (i = 0; i < dr->device_count; i++) {
dr->func[i].v_id = relations->func[i].v_id;
dr->func[i].d_id = relations->func[i].d_id;
dr->func[i].rev = relations->func[i].rev;
dr->func[i].prog_intf = relations->func[i].prog_intf;
dr->func[i].subclass = relations->func[i].subclass;
dr->func[i].base_class = relations->func[i].base_class;
dr->func[i].subsystem_id = relations->func[i].subsystem_id;
dr->func[i].win_slot = relations->func[i].win_slot;
dr->func[i].ser = relations->func[i].ser;
}
if (hv_pci_start_relations_work(hbus, dr))
kfree(dr);
}
/**
* hv_pci_devices_present2() - Handle list of new children
* @hbus: Root PCI bus, as understood by this driver
* @relations: Packet from host listing children
*
* This function is the v2 version of hv_pci_devices_present()
*/
static void hv_pci_devices_present2(struct hv_pcibus_device *hbus,
struct pci_bus_relations2 *relations)
{
struct hv_dr_state *dr;
int i;
dr = kzalloc(offsetof(struct hv_dr_state, func) +
(sizeof(struct hv_pcidev_description) *
(relations->device_count)), GFP_NOWAIT);
if (!dr)
return;
dr->device_count = relations->device_count;
for (i = 0; i < dr->device_count; i++) {
dr->func[i].v_id = relations->func[i].v_id;
dr->func[i].d_id = relations->func[i].d_id;
dr->func[i].rev = relations->func[i].rev;
dr->func[i].prog_intf = relations->func[i].prog_intf;
dr->func[i].subclass = relations->func[i].subclass;
dr->func[i].base_class = relations->func[i].base_class;
dr->func[i].subsystem_id = relations->func[i].subsystem_id;
dr->func[i].win_slot = relations->func[i].win_slot;
dr->func[i].ser = relations->func[i].ser;
dr->func[i].flags = relations->func[i].flags;
dr->func[i].virtual_numa_node =
relations->func[i].virtual_numa_node;
}
if (hv_pci_start_relations_work(hbus, dr))
kfree(dr);
}
/**
@ -2280,6 +2375,7 @@ static void hv_pci_onchannelcallback(void *context)
struct pci_response *response;
struct pci_incoming_message *new_message;
struct pci_bus_relations *bus_rel;
struct pci_bus_relations2 *bus_rel2;
struct pci_dev_inval_block *inval;
struct pci_dev_incoming *dev_message;
struct hv_pci_dev *hpdev;
@ -2347,6 +2443,21 @@ static void hv_pci_onchannelcallback(void *context)
hv_pci_devices_present(hbus, bus_rel);
break;
case PCI_BUS_RELATIONS2:
bus_rel2 = (struct pci_bus_relations2 *)buffer;
if (bytes_recvd <
offsetof(struct pci_bus_relations2, func) +
(sizeof(struct pci_function_description2) *
(bus_rel2->device_count))) {
dev_err(&hbus->hdev->device,
"bus relations v2 too small\n");
break;
}
hv_pci_devices_present2(hbus, bus_rel2);
break;
case PCI_EJECT:
dev_message = (struct pci_dev_incoming *)buffer;
@ -2922,7 +3033,7 @@ static int hv_pci_probe(struct hv_device *hdev,
* positive by using kmemleak_alloc() and kmemleak_free() to ask
* kmemleak to track and scan the hbus buffer.
*/
hbus = (struct hv_pcibus_device *)kzalloc(HV_HYP_PAGE_SIZE, GFP_KERNEL);
hbus = kzalloc(HV_HYP_PAGE_SIZE, GFP_KERNEL);
if (!hbus)
return -ENOMEM;
hbus->state = hv_pcibus_init;
@ -3058,7 +3169,7 @@ destroy_wq:
free_dom:
hv_put_dom_num(hbus->sysdata.domain);
free_bus:
free_page((unsigned long)hbus);
kfree(hbus);
return ret;
}
@ -3069,7 +3180,7 @@ static int hv_pci_bus_exit(struct hv_device *hdev, bool hibernating)
struct pci_packet teardown_packet;
u8 buffer[sizeof(struct pci_message)];
} pkt;
struct pci_bus_relations relations;
struct hv_dr_state *dr;
struct hv_pci_compl comp_pkt;
int ret;
@ -3082,8 +3193,9 @@ static int hv_pci_bus_exit(struct hv_device *hdev, bool hibernating)
if (!hibernating) {
/* Delete any children which might still exist. */
memset(&relations, 0, sizeof(relations));
hv_pci_devices_present(hbus, &relations);
dr = kzalloc(sizeof(*dr), GFP_KERNEL);
if (dr && hv_pci_start_relations_work(hbus, dr))
kfree(dr);
}
ret = hv_send_resources_released(hdev);

183
drivers/pci/controller/pci-tegra.c
View File

@ -355,16 +355,6 @@ struct tegra_pcie {
int irq;
struct resource cs;
struct resource io;
struct resource pio;
struct resource mem;
struct resource prefetch;
struct resource busn;
struct {
resource_size_t mem;
resource_size_t io;
} offset;
struct clk *pex_clk;
struct clk *afi_clk;
@ -797,38 +787,6 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, 0x0bf1, tegra_pcie_relax_enable);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, 0x0e1c, tegra_pcie_relax_enable);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, 0x0e1d, tegra_pcie_relax_enable);
static int tegra_pcie_request_resources(struct tegra_pcie *pcie)
{
struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
struct list_head *windows = &host->windows;
struct device *dev = pcie->dev;
int err;
pci_add_resource_offset(windows, &pcie->pio, pcie->offset.io);
pci_add_resource_offset(windows, &pcie->mem, pcie->offset.mem);
pci_add_resource_offset(windows, &pcie->prefetch, pcie->offset.mem);
pci_add_resource(windows, &pcie->busn);
err = devm_request_pci_bus_resources(dev, windows);
if (err < 0) {
pci_free_resource_list(windows);
return err;
}
pci_remap_iospace(&pcie->pio, pcie->io.start);
return 0;
}
static void tegra_pcie_free_resources(struct tegra_pcie *pcie)
{
struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
struct list_head *windows = &host->windows;
pci_unmap_iospace(&pcie->pio);
pci_free_resource_list(windows);
}
static int tegra_pcie_map_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
{
struct tegra_pcie *pcie = pdev->bus->sysdata;
@ -909,36 +867,49 @@ static irqreturn_t tegra_pcie_isr(int irq, void *arg)
*/
static void tegra_pcie_setup_translations(struct tegra_pcie *pcie)
{
u32 fpci_bar, size, axi_address;
u32 size;
struct resource_entry *entry;
struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
/* Bar 0: type 1 extended configuration space */
size = resource_size(&pcie->cs);
afi_writel(pcie, pcie->cs.start, AFI_AXI_BAR0_START);
afi_writel(pcie, size >> 12, AFI_AXI_BAR0_SZ);
/* Bar 1: downstream IO bar */
fpci_bar = 0xfdfc0000;
size = resource_size(&pcie->io);
axi_address = pcie->io.start;
afi_writel(pcie, axi_address, AFI_AXI_BAR1_START);
afi_writel(pcie, size >> 12, AFI_AXI_BAR1_SZ);
afi_writel(pcie, fpci_bar, AFI_FPCI_BAR1);
resource_list_for_each_entry(entry, &bridge->windows) {
u32 fpci_bar, axi_address;
struct resource *res = entry->res;
/* Bar 2: prefetchable memory BAR */
fpci_bar = (((pcie->prefetch.start >> 12) & 0x0fffffff) << 4) | 0x1;
size = resource_size(&pcie->prefetch);
axi_address = pcie->prefetch.start;
afi_writel(pcie, axi_address, AFI_AXI_BAR2_START);
afi_writel(pcie, size >> 12, AFI_AXI_BAR2_SZ);
afi_writel(pcie, fpci_bar, AFI_FPCI_BAR2);
size = resource_size(res);
/* Bar 3: non prefetchable memory BAR */
fpci_bar = (((pcie->mem.start >> 12) & 0x0fffffff) << 4) | 0x1;
size = resource_size(&pcie->mem);
axi_address = pcie->mem.start;
afi_writel(pcie, axi_address, AFI_AXI_BAR3_START);
afi_writel(pcie, size >> 12, AFI_AXI_BAR3_SZ);
afi_writel(pcie, fpci_bar, AFI_FPCI_BAR3);
switch (resource_type(res)) {
case IORESOURCE_IO:
/* Bar 1: downstream IO bar */
fpci_bar = 0xfdfc0000;
axi_address = pci_pio_to_address(res->start);
afi_writel(pcie, axi_address, AFI_AXI_BAR1_START);
afi_writel(pcie, size >> 12, AFI_AXI_BAR1_SZ);
afi_writel(pcie, fpci_bar, AFI_FPCI_BAR1);
break;
case IORESOURCE_MEM:
fpci_bar = (((res->start >> 12) & 0x0fffffff) << 4) | 0x1;
axi_address = res->start;
if (res->flags & IORESOURCE_PREFETCH) {
/* Bar 2: prefetchable memory BAR */
afi_writel(pcie, axi_address, AFI_AXI_BAR2_START);
afi_writel(pcie, size >> 12, AFI_AXI_BAR2_SZ);
afi_writel(pcie, fpci_bar, AFI_FPCI_BAR2);
} else {
/* Bar 3: non prefetchable memory BAR */
afi_writel(pcie, axi_address, AFI_AXI_BAR3_START);
afi_writel(pcie, size >> 12, AFI_AXI_BAR3_SZ);
afi_writel(pcie, fpci_bar, AFI_FPCI_BAR3);
}
break;
}
}
/* NULL out the remaining BARs as they are not used */
afi_writel(pcie, 0, AFI_AXI_BAR4_START);
@ -2157,76 +2128,10 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie)
struct device *dev = pcie->dev;
struct device_node *np = dev->of_node, *port;
const struct tegra_pcie_soc *soc = pcie->soc;
struct of_pci_range_parser parser;
struct of_pci_range range;
u32 lanes = 0, mask = 0;
unsigned int lane = 0;
struct resource res;
int err;
if (of_pci_range_parser_init(&parser, np)) {
dev_err(dev, "missing \"ranges\" property\n");
return -EINVAL;
}
for_each_of_pci_range(&parser, &range) {
err = of_pci_range_to_resource(&range, np, &res);
if (err < 0)
return err;
switch (res.flags & IORESOURCE_TYPE_BITS) {
case IORESOURCE_IO:
/* Track the bus -> CPU I/O mapping offset. */
pcie->offset.io = res.start - range.pci_addr;
memcpy(&pcie->pio, &res, sizeof(res));
pcie->pio.name = np->full_name;
/*
* The Tegra PCIe host bridge uses this to program the
* mapping of the I/O space to the physical address,
* so we override the .start and .end fields here that
* of_pci_range_to_resource() converted to I/O space.
* We also set the IORESOURCE_MEM type to clarify that
* the resource is in the physical memory space.
*/
pcie->io.start = range.cpu_addr;
pcie->io.end = range.cpu_addr + range.size - 1;
pcie->io.flags = IORESOURCE_MEM;
pcie->io.name = "I/O";
memcpy(&res, &pcie->io, sizeof(res));
break;
case IORESOURCE_MEM:
/*
* Track the bus -> CPU memory mapping offset. This
* assumes that the prefetchable and non-prefetchable
* regions will be the last of type IORESOURCE_MEM in
* the ranges property.
* */
pcie->offset.mem = res.start - range.pci_addr;
if (res.flags & IORESOURCE_PREFETCH) {
memcpy(&pcie->prefetch, &res, sizeof(res));
pcie->prefetch.name = "prefetchable";
} else {
memcpy(&pcie->mem, &res, sizeof(res));
pcie->mem.name = "non-prefetchable";
}
break;
}
}
err = of_pci_parse_bus_range(np, &pcie->busn);
if (err < 0) {
dev_err(dev, "failed to parse ranges property: %d\n", err);
pcie->busn.name = np->name;
pcie->busn.start = 0;
pcie->busn.end = 0xff;
pcie->busn.flags = IORESOURCE_BUS;
}
/* parse root ports */
for_each_child_of_node(np, port) {
struct tegra_pcie_port *rp;
@ -2766,6 +2671,7 @@ static int tegra_pcie_probe(struct platform_device *pdev)
struct pci_host_bridge *host;
struct tegra_pcie *pcie;
struct pci_bus *child;
struct resource *bus;
int err;
host = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
@ -2780,6 +2686,12 @@ static int tegra_pcie_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&pcie->ports);
pcie->dev = dev;
err = pci_parse_request_of_pci_ranges(dev, &host->windows, NULL, &bus);
if (err) {
dev_err(dev, "Getting bridge resources failed\n");
return err;
}
err = tegra_pcie_parse_dt(pcie);
if (err < 0)
return err;
@ -2803,11 +2715,7 @@ static int tegra_pcie_probe(struct platform_device *pdev)
goto teardown_msi;
}
err = tegra_pcie_request_resources(pcie);
if (err)
goto pm_runtime_put;
host->busnr = pcie->busn.start;
host->busnr = bus->start;
host->dev.parent = &pdev->dev;
host->ops = &tegra_pcie_ops;
host->map_irq = tegra_pcie_map_irq;
@ -2816,7 +2724,7 @@ static int tegra_pcie_probe(struct platform_device *pdev)
err = pci_scan_root_bus_bridge(host);
if (err < 0) {
dev_err(dev, "failed to register host: %d\n", err);
goto free_resources;
goto pm_runtime_put;
}
pci_bus_size_bridges(host->bus);
@ -2835,8 +2743,6 @@ static int tegra_pcie_probe(struct platform_device *pdev)
return 0;
free_resources:
tegra_pcie_free_resources(pcie);
pm_runtime_put:
pm_runtime_put_sync(pcie->dev);
pm_runtime_disable(pcie->dev);
@ -2858,7 +2764,6 @@ static int tegra_pcie_remove(struct platform_device *pdev)
pci_stop_root_bus(host->bus);
pci_remove_root_bus(host->bus);
tegra_pcie_free_resources(pcie);
pm_runtime_put_sync(pcie->dev);
pm_runtime_disable(pcie->dev);

4
drivers/pci/controller/pcie-brcmstb.c
View File

@ -824,8 +824,8 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie)
cls = FIELD_GET(PCI_EXP_LNKSTA_CLS, lnksta);
nlw = FIELD_GET(PCI_EXP_LNKSTA_NLW, lnksta);
dev_info(dev, "link up, %s x%u %s\n",
PCIE_SPEED2STR(cls + PCI_SPEED_133MHz_PCIX_533),
nlw, ssc_good ? "(SSC)" : "(!SSC)");
pci_speed_string(pcie_link_speed[cls]), nlw,
ssc_good ? "(SSC)" : "(!SSC)");
/* PCIe->SCB endian mode for BAR */
tmp = readl(base + PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1);

408
drivers/pci/endpoint/functions/pci-epf-test.c
View File

@ -8,6 +8,7 @@
#include <linux/crc32.h>
#include <linux/delay.h>
#include <linux/dmaengine.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/slab.h>
@ -39,6 +40,8 @@
#define STATUS_SRC_ADDR_INVALID BIT(7)
#define STATUS_DST_ADDR_INVALID BIT(8)
#define FLAG_USE_DMA BIT(0)
#define TIMER_RESOLUTION 1
static struct workqueue_struct *kpcitest_workqueue;
@ -47,7 +50,11 @@ struct pci_epf_test {
void *reg[PCI_STD_NUM_BARS];
struct pci_epf *epf;
enum pci_barno test_reg_bar;
size_t msix_table_offset;
struct delayed_work cmd_handler;
struct dma_chan *dma_chan;
struct completion transfer_complete;
bool dma_supported;
const struct pci_epc_features *epc_features;
};
@ -61,6 +68,7 @@ struct pci_epf_test_reg {
u32 checksum;
u32 irq_type;
u32 irq_number;
u32 flags;
} __packed;
static struct pci_epf_header test_header = {
@ -72,13 +80,156 @@ static struct pci_epf_header test_header = {
static size_t bar_size[] = { 512, 512, 1024, 16384, 131072, 1048576 };
static void pci_epf_test_dma_callback(void *param)
{
struct pci_epf_test *epf_test = param;
complete(&epf_test->transfer_complete);
}
/**
* pci_epf_test_data_transfer() - Function that uses dmaengine API to transfer
* data between PCIe EP and remote PCIe RC
* @epf_test: the EPF test device that performs the data transfer operation
* @dma_dst: The destination address of the data transfer. It can be a physical
* address given by pci_epc_mem_alloc_addr or DMA mapping APIs.
* @dma_src: The source address of the data transfer. It can be a physical
* address given by pci_epc_mem_alloc_addr or DMA mapping APIs.
* @len: The size of the data transfer
*
* Function that uses dmaengine API to transfer data between PCIe EP and remote
* PCIe RC. The source and destination address can be a physical address given
* by pci_epc_mem_alloc_addr or the one obtained using DMA mapping APIs.
*
* The function returns '0' on success and negative value on failure.
*/
static int pci_epf_test_data_transfer(struct pci_epf_test *epf_test,
dma_addr_t dma_dst, dma_addr_t dma_src,
size_t len)
{
enum dma_ctrl_flags flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
struct dma_chan *chan = epf_test->dma_chan;
struct pci_epf *epf = epf_test->epf;
struct dma_async_tx_descriptor *tx;
struct device *dev = &epf->dev;
dma_cookie_t cookie;
int ret;
if (IS_ERR_OR_NULL(chan)) {
dev_err(dev, "Invalid DMA memcpy channel\n");
return -EINVAL;
}
tx = dmaengine_prep_dma_memcpy(chan, dma_dst, dma_src, len, flags);
if (!tx) {
dev_err(dev, "Failed to prepare DMA memcpy\n");
return -EIO;
}
tx->callback = pci_epf_test_dma_callback;
tx->callback_param = epf_test;
cookie = tx->tx_submit(tx);
reinit_completion(&epf_test->transfer_complete);
ret = dma_submit_error(cookie);
if (ret) {
dev_err(dev, "Failed to do DMA tx_submit %d\n", cookie);
return -EIO;
}
dma_async_issue_pending(chan);
ret = wait_for_completion_interruptible(&epf_test->transfer_complete);
if (ret < 0) {
dmaengine_terminate_sync(chan);
dev_err(dev, "DMA wait_for_completion_timeout\n");
return -ETIMEDOUT;
}
return 0;
}
/**
* pci_epf_test_init_dma_chan() - Function to initialize EPF test DMA channel
* @epf_test: the EPF test device that performs data transfer operation
*
* Function to initialize EPF test DMA channel.
*/
static int pci_epf_test_init_dma_chan(struct pci_epf_test *epf_test)
{
struct pci_epf *epf = epf_test->epf;
struct device *dev = &epf->dev;
struct dma_chan *dma_chan;
dma_cap_mask_t mask;
int ret;
dma_cap_zero(mask);
dma_cap_set(DMA_MEMCPY, mask);
dma_chan = dma_request_chan_by_mask(&mask);
if (IS_ERR(dma_chan)) {
ret = PTR_ERR(dma_chan);
if (ret != -EPROBE_DEFER)
dev_err(dev, "Failed to get DMA channel\n");
return ret;
}
init_completion(&epf_test->transfer_complete);
epf_test->dma_chan = dma_chan;
return 0;
}
/**
* pci_epf_test_clean_dma_chan() - Function to cleanup EPF test DMA channel
* @epf: the EPF test device that performs data transfer operation
*
* Helper to cleanup EPF test DMA channel.
*/
static void pci_epf_test_clean_dma_chan(struct pci_epf_test *epf_test)
{
dma_release_channel(epf_test->dma_chan);
epf_test->dma_chan = NULL;
}
static void pci_epf_test_print_rate(const char *ops, u64 size,
struct timespec64 *start,
struct timespec64 *end, bool dma)
{
struct timespec64 ts;
u64 rate, ns;
ts = timespec64_sub(*end, *start);
/* convert both size (stored in 'rate') and time in terms of 'ns' */
ns = timespec64_to_ns(&ts);
rate = size * NSEC_PER_SEC;
/* Divide both size (stored in 'rate') and ns by a common factor */
while (ns > UINT_MAX) {
rate >>= 1;
ns >>= 1;
}
if (!ns)
return;
/* calculate the rate */
do_div(rate, (uint32_t)ns);
pr_info("\n%s => Size: %llu bytes\t DMA: %s\t Time: %llu.%09u seconds\t"
"Rate: %llu KB/s\n", ops, size, dma ? "YES" : "NO",
(u64)ts.tv_sec, (u32)ts.tv_nsec, rate / 1024);
}
static int pci_epf_test_copy(struct pci_epf_test *epf_test)
{
int ret;
bool use_dma;
void __iomem *src_addr;
void __iomem *dst_addr;
phys_addr_t src_phys_addr;
phys_addr_t dst_phys_addr;
struct timespec64 start, end;
struct pci_epf *epf = epf_test->epf;
struct device *dev = &epf->dev;
struct pci_epc *epc = epf->epc;
@ -117,8 +268,26 @@ static int pci_epf_test_copy(struct pci_epf_test *epf_test)
goto err_dst_addr;
}
memcpy(dst_addr, src_addr, reg->size);
ktime_get_ts64(&start);
use_dma = !!(reg->flags & FLAG_USE_DMA);
if (use_dma) {
if (!epf_test->dma_supported) {
dev_err(dev, "Cannot transfer data using DMA\n");
ret = -EINVAL;
goto err_map_addr;
}
ret = pci_epf_test_data_transfer(epf_test, dst_phys_addr,
src_phys_addr, reg->size);
if (ret)
dev_err(dev, "Data transfer failed\n");
} else {
memcpy(dst_addr, src_addr, reg->size);
}
ktime_get_ts64(&end);
pci_epf_test_print_rate("COPY", reg->size, &start, &end, use_dma);
err_map_addr:
pci_epc_unmap_addr(epc, epf->func_no, dst_phys_addr);
err_dst_addr:
@ -140,10 +309,14 @@ static int pci_epf_test_read(struct pci_epf_test *epf_test)
void __iomem *src_addr;
void *buf;
u32 crc32;
bool use_dma;
phys_addr_t phys_addr;
phys_addr_t dst_phys_addr;
struct timespec64 start, end;
struct pci_epf *epf = epf_test->epf;
struct device *dev = &epf->dev;
struct pci_epc *epc = epf->epc;
struct device *dma_dev = epf->epc->dev.parent;
enum pci_barno test_reg_bar = epf_test->test_reg_bar;
struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar];
@ -169,12 +342,44 @@ static int pci_epf_test_read(struct pci_epf_test *epf_test)
goto err_map_addr;
}
memcpy_fromio(buf, src_addr, reg->size);
use_dma = !!(reg->flags & FLAG_USE_DMA);
if (use_dma) {
if (!epf_test->dma_supported) {
dev_err(dev, "Cannot transfer data using DMA\n");
ret = -EINVAL;
goto err_dma_map;
}
dst_phys_addr = dma_map_single(dma_dev, buf, reg->size,
DMA_FROM_DEVICE);
if (dma_mapping_error(dma_dev, dst_phys_addr)) {
dev_err(dev, "Failed to map destination buffer addr\n");
ret = -ENOMEM;
goto err_dma_map;
}
ktime_get_ts64(&start);
ret = pci_epf_test_data_transfer(epf_test, dst_phys_addr,
phys_addr, reg->size);
if (ret)
dev_err(dev, "Data transfer failed\n");
ktime_get_ts64(&end);
dma_unmap_single(dma_dev, dst_phys_addr, reg->size,
DMA_FROM_DEVICE);
} else {
ktime_get_ts64(&start);
memcpy_fromio(buf, src_addr, reg->size);
ktime_get_ts64(&end);
}
pci_epf_test_print_rate("READ", reg->size, &start, &end, use_dma);
crc32 = crc32_le(~0, buf, reg->size);
if (crc32 != reg->checksum)
ret = -EIO;
err_dma_map:
kfree(buf);
err_map_addr:
@ -192,10 +397,14 @@ static int pci_epf_test_write(struct pci_epf_test *epf_test)
int ret;
void __iomem *dst_addr;
void *buf;
bool use_dma;
phys_addr_t phys_addr;
phys_addr_t src_phys_addr;
struct timespec64 start, end;
struct pci_epf *epf = epf_test->epf;
struct device *dev = &epf->dev;
struct pci_epc *epc = epf->epc;
struct device *dma_dev = epf->epc->dev.parent;
enum pci_barno test_reg_bar = epf_test->test_reg_bar;
struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar];
@ -224,7 +433,38 @@ static int pci_epf_test_write(struct pci_epf_test *epf_test)
get_random_bytes(buf, reg->size);
reg->checksum = crc32_le(~0, buf, reg->size);
memcpy_toio(dst_addr, buf, reg->size);
use_dma = !!(reg->flags & FLAG_USE_DMA);
if (use_dma) {
if (!epf_test->dma_supported) {
dev_err(dev, "Cannot transfer data using DMA\n");
ret = -EINVAL;
goto err_map_addr;
}
src_phys_addr = dma_map_single(dma_dev, buf, reg->size,
DMA_TO_DEVICE);
if (dma_mapping_error(dma_dev, src_phys_addr)) {
dev_err(dev, "Failed to map source buffer addr\n");
ret = -ENOMEM;
goto err_dma_map;
}
ktime_get_ts64(&start);
ret = pci_epf_test_data_transfer(epf_test, phys_addr,
src_phys_addr, reg->size);
if (ret)
dev_err(dev, "Data transfer failed\n");
ktime_get_ts64(&end);
dma_unmap_single(dma_dev, src_phys_addr, reg->size,
DMA_TO_DEVICE);
} else {
ktime_get_ts64(&start);
memcpy_toio(dst_addr, buf, reg->size);
ktime_get_ts64(&end);
}
pci_epf_test_print_rate("WRITE", reg->size, &start, &end, use_dma);
/*
* wait 1ms inorder for the write to complete. Without this delay L3
@ -232,6 +472,7 @@ static int pci_epf_test_write(struct pci_epf_test *epf_test)
*/
usleep_range(1000, 2000);
err_dma_map:
kfree(buf);
err_map_addr:
@ -360,14 +601,6 @@ reset_handler:
msecs_to_jiffies(1));
}
static void pci_epf_test_linkup(struct pci_epf *epf)
{
struct pci_epf_test *epf_test = epf_get_drvdata(epf);
queue_delayed_work(kpcitest_workqueue, &epf_test->cmd_handler,
msecs_to_jiffies(1));
}
static void pci_epf_test_unbind(struct pci_epf *epf)
{
struct pci_epf_test *epf_test = epf_get_drvdata(epf);
@ -376,6 +609,7 @@ static void pci_epf_test_unbind(struct pci_epf *epf)
int bar;
cancel_delayed_work(&epf_test->cmd_handler);
pci_epf_test_clean_dma_chan(epf_test);
pci_epc_stop(epc);
for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
epf_bar = &epf->bar[bar];
@ -424,11 +658,90 @@ static int pci_epf_test_set_bar(struct pci_epf *epf)
return 0;
}
static int pci_epf_test_core_init(struct pci_epf *epf)
{
struct pci_epf_test *epf_test = epf_get_drvdata(epf);
struct pci_epf_header *header = epf->header;
const struct pci_epc_features *epc_features;
struct pci_epc *epc = epf->epc;
struct device *dev = &epf->dev;
bool msix_capable = false;
bool msi_capable = true;
int ret;
epc_features = pci_epc_get_features(epc, epf->func_no);
if (epc_features) {
msix_capable = epc_features->msix_capable;
msi_capable = epc_features->msi_capable;
}
ret = pci_epc_write_header(epc, epf->func_no, header);
if (ret) {
dev_err(dev, "Configuration header write failed\n");
return ret;
}
ret = pci_epf_test_set_bar(epf);
if (ret)
return ret;
if (msi_capable) {
ret = pci_epc_set_msi(epc, epf->func_no, epf->msi_interrupts);
if (ret) {
dev_err(dev, "MSI configuration failed\n");
return ret;
}
}
if (msix_capable) {
ret = pci_epc_set_msix(epc, epf->func_no, epf->msix_interrupts,
epf_test->test_reg_bar,
epf_test->msix_table_offset);
if (ret) {
dev_err(dev, "MSI-X configuration failed\n");
return ret;
}
}
return 0;
}
static int pci_epf_test_notifier(struct notifier_block *nb, unsigned long val,
void *data)
{
struct pci_epf *epf = container_of(nb, struct pci_epf, nb);
struct pci_epf_test *epf_test = epf_get_drvdata(epf);
int ret;
switch (val) {
case CORE_INIT:
ret = pci_epf_test_core_init(epf);
if (ret)
return NOTIFY_BAD;
break;
case LINK_UP:
queue_delayed_work(kpcitest_workqueue, &epf_test->cmd_handler,
msecs_to_jiffies(1));
break;
default:
dev_err(&epf->dev, "Invalid EPF test notifier event\n");
return NOTIFY_BAD;
}
return NOTIFY_OK;
}
static int pci_epf_test_alloc_space(struct pci_epf *epf)
{
struct pci_epf_test *epf_test = epf_get_drvdata(epf);
struct device *dev = &epf->dev;
struct pci_epf_bar *epf_bar;
size_t msix_table_size = 0;
size_t test_reg_bar_size;
size_t pba_size = 0;
bool msix_capable;
void *base;
int bar, add;
enum pci_barno test_reg_bar = epf_test->test_reg_bar;
@ -437,13 +750,25 @@ static int pci_epf_test_alloc_space(struct pci_epf *epf)
epc_features = epf_test->epc_features;
if (epc_features->bar_fixed_size[test_reg_bar])
test_reg_size = bar_size[test_reg_bar];
else
test_reg_size = sizeof(struct pci_epf_test_reg);
test_reg_bar_size = ALIGN(sizeof(struct pci_epf_test_reg), 128);
base = pci_epf_alloc_space(epf, test_reg_size,
test_reg_bar, epc_features->align);
msix_capable = epc_features->msix_capable;
if (msix_capable) {
msix_table_size = PCI_MSIX_ENTRY_SIZE * epf->msix_interrupts;
epf_test->msix_table_offset = test_reg_bar_size;
/* Align to QWORD or 8 Bytes */
pba_size = ALIGN(DIV_ROUND_UP(epf->msix_interrupts, 8), 8);
}
test_reg_size = test_reg_bar_size + msix_table_size + pba_size;
if (epc_features->bar_fixed_size[test_reg_bar]) {
if (test_reg_size > bar_size[test_reg_bar])
return -ENOMEM;
test_reg_size = bar_size[test_reg_bar];
}
base = pci_epf_alloc_space(epf, test_reg_size, test_reg_bar,
epc_features->align);
if (!base) {
dev_err(dev, "Failed to allocated register space\n");
return -ENOMEM;
@ -492,14 +817,11 @@ static int pci_epf_test_bind(struct pci_epf *epf)
{
int ret;
struct pci_epf_test *epf_test = epf_get_drvdata(epf);
struct pci_epf_header *header = epf->header;
const struct pci_epc_features *epc_features;
enum pci_barno test_reg_bar = BAR_0;
struct pci_epc *epc = epf->epc;
struct device *dev = &epf->dev;
bool linkup_notifier = false;
bool msix_capable = false;
bool msi_capable = true;
bool core_init_notifier = false;
if (WARN_ON_ONCE(!epc))
return -EINVAL;
@ -507,8 +829,7 @@ static int pci_epf_test_bind(struct pci_epf *epf)
epc_features = pci_epc_get_features(epc, epf->func_no);
if (epc_features) {
linkup_notifier = epc_features->linkup_notifier;
msix_capable = epc_features->msix_capable;
msi_capable = epc_features->msi_capable;
core_init_notifier = epc_features->core_init_notifier;
test_reg_bar = pci_epc_get_first_free_bar(epc_features);
pci_epf_configure_bar(epf, epc_features);
}
@ -516,38 +837,28 @@ static int pci_epf_test_bind(struct pci_epf *epf)
epf_test->test_reg_bar = test_reg_bar;
epf_test->epc_features = epc_features;
ret = pci_epc_write_header(epc, epf->func_no, header);
if (ret) {
dev_err(dev, "Configuration header write failed\n");
return ret;
}
ret = pci_epf_test_alloc_space(epf);
if (ret)
return ret;
ret = pci_epf_test_set_bar(epf);
if (!core_init_notifier) {
ret = pci_epf_test_core_init(epf);
if (ret)
return ret;
}
epf_test->dma_supported = true;
ret = pci_epf_test_init_dma_chan(epf_test);
if (ret)
return ret;
epf_test->dma_supported = false;
if (msi_capable) {
ret = pci_epc_set_msi(epc, epf->func_no, epf->msi_interrupts);
if (ret) {
dev_err(dev, "MSI configuration failed\n");
return ret;
}
}
if (msix_capable) {
ret = pci_epc_set_msix(epc, epf->func_no, epf->msix_interrupts);
if (ret) {
dev_err(dev, "MSI-X configuration failed\n");
return ret;
}
}
if (!linkup_notifier)
if (linkup_notifier) {
epf->nb.notifier_call = pci_epf_test_notifier;
pci_epc_register_notifier(epc, &epf->nb);
} else {
queue_work(kpcitest_workqueue, &epf_test->cmd_handler.work);
}
return 0;
}
@ -580,7 +891,6 @@ static int pci_epf_test_probe(struct pci_epf *epf)
static struct pci_epf_ops ops = {
.unbind = pci_epf_test_unbind,
.bind = pci_epf_test_bind,
.linkup = pci_epf_test_linkup,
};
static struct pci_epf_driver test_driver = {

28
drivers/pci/endpoint/pci-ep-cfs.c
View File

@ -29,7 +29,6 @@ struct pci_epc_group {
struct config_group group;
struct pci_epc *epc;
bool start;
unsigned long function_num_map;
};
static inline struct pci_epf_group *to_pci_epf_group(struct config_item *item)
@ -58,6 +57,7 @@ static ssize_t pci_epc_start_store(struct config_item *item, const char *page,
if (!start) {
pci_epc_stop(epc);
epc_group->start = 0;
return len;
}
@ -89,37 +89,22 @@ static int pci_epc_epf_link(struct config_item *epc_item,
struct config_item *epf_item)
{
int ret;
u32 func_no = 0;
struct pci_epf_group *epf_group = to_pci_epf_group(epf_item);
struct pci_epc_group *epc_group = to_pci_epc_group(epc_item);
struct pci_epc *epc = epc_group->epc;
struct pci_epf *epf = epf_group->epf;
func_no = find_first_zero_bit(&epc_group->function_num_map,
BITS_PER_LONG);
if (func_no >= BITS_PER_LONG)
return -EINVAL;
set_bit(func_no, &epc_group->function_num_map);
epf->func_no = func_no;
ret = pci_epc_add_epf(epc, epf);
if (ret)
goto err_add_epf;
return ret;
ret = pci_epf_bind(epf);
if (ret)
goto err_epf_bind;
if (ret) {
pci_epc_remove_epf(epc, epf);
return ret;
}
return 0;
err_epf_bind:
pci_epc_remove_epf(epc, epf);
err_add_epf:
clear_bit(func_no, &epc_group->function_num_map);
return ret;
}
static void pci_epc_epf_unlink(struct config_item *epc_item,
@ -134,7 +119,6 @@ static void pci_epc_epf_unlink(struct config_item *epc_item,
epc = epc_group->epc;
epf = epf_group->epf;
clear_bit(epf->func_no, &epc_group->function_num_map);
pci_epf_unbind(epf);
pci_epc_remove_epf(epc, epf);
}

137
drivers/pci/endpoint/pci-epc-core.c
View File

@ -120,7 +120,6 @@ const struct pci_epc_features *pci_epc_get_features(struct pci_epc *epc,
u8 func_no)
{
const struct pci_epc_features *epc_features;
unsigned long flags;
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return NULL;
@ -128,9 +127,9 @@ const struct pci_epc_features *pci_epc_get_features(struct pci_epc *epc,
if (!epc->ops->get_features)
return NULL;
spin_lock_irqsave(&epc->lock, flags);
mutex_lock(&epc->lock);
epc_features = epc->ops->get_features(epc, func_no);
spin_unlock_irqrestore(&epc->lock, flags);
mutex_unlock(&epc->lock);
return epc_features;
}
@ -144,14 +143,12 @@ EXPORT_SYMBOL_GPL(pci_epc_get_features);
*/
void pci_epc_stop(struct pci_epc *epc)
{
unsigned long flags;
if (IS_ERR(epc) || !epc->ops->stop)
return;
spin_lock_irqsave(&epc->lock, flags);
mutex_lock(&epc->lock);
epc->ops->stop(epc);
spin_unlock_irqrestore(&epc->lock, flags);
mutex_unlock(&epc->lock);
}
EXPORT_SYMBOL_GPL(pci_epc_stop);
@ -164,7 +161,6 @@ EXPORT_SYMBOL_GPL(pci_epc_stop);
int pci_epc_start(struct pci_epc *epc)
{
int ret;
unsigned long flags;
if (IS_ERR(epc))
return -EINVAL;
@ -172,9 +168,9 @@ int pci_epc_start(struct pci_epc *epc)
if (!epc->ops->start)
return 0;
spin_lock_irqsave(&epc->lock, flags);
mutex_lock(&epc->lock);
ret = epc->ops->start(epc);
spin_unlock_irqrestore(&epc->lock, flags);
mutex_unlock(&epc->lock);
return ret;
}
@ -193,7 +189,6 @@ int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no,
enum pci_epc_irq_type type, u16 interrupt_num)
{
int ret;
unsigned long flags;
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return -EINVAL;
@ -201,9 +196,9 @@ int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no,
if (!epc->ops->raise_irq)
return 0;
spin_lock_irqsave(&epc->lock, flags);
mutex_lock(&epc->lock);
ret = epc->ops->raise_irq(epc, func_no, type, interrupt_num);
spin_unlock_irqrestore(&epc->lock, flags);
mutex_unlock(&epc->lock);
return ret;
}
@ -219,7 +214,6 @@ EXPORT_SYMBOL_GPL(pci_epc_raise_irq);
int pci_epc_get_msi(struct pci_epc *epc, u8 func_no)
{
int interrupt;
unsigned long flags;
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return 0;
@ -227,9 +221,9 @@ int pci_epc_get_msi(struct pci_epc *epc, u8 func_no)
if (!epc->ops->get_msi)
return 0;
spin_lock_irqsave(&epc->lock, flags);
mutex_lock(&epc->lock);
interrupt = epc->ops->get_msi(epc, func_no);
spin_unlock_irqrestore(&epc->lock, flags);
mutex_unlock(&epc->lock);
if (interrupt < 0)
return 0;
@ -252,7 +246,6 @@ int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts)
{
int ret;
u8 encode_int;
unsigned long flags;
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
interrupts > 32)
@ -263,9 +256,9 @@ int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts)
encode_int = order_base_2(interrupts);
spin_lock_irqsave(&epc->lock, flags);
mutex_lock(&epc->lock);
ret = epc->ops->set_msi(epc, func_no, encode_int);
spin_unlock_irqrestore(&epc->lock, flags);
mutex_unlock(&epc->lock);
return ret;
}
@ -281,7 +274,6 @@ EXPORT_SYMBOL_GPL(pci_epc_set_msi);
int pci_epc_get_msix(struct pci_epc *epc, u8 func_no)
{
int interrupt;
unsigned long flags;
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return 0;
@ -289,9 +281,9 @@ int pci_epc_get_msix(struct pci_epc *epc, u8 func_no)
if (!epc->ops->get_msix)
return 0;
spin_lock_irqsave(&epc->lock, flags);
mutex_lock(&epc->lock);
interrupt = epc->ops->get_msix(epc, func_no);
spin_unlock_irqrestore(&epc->lock, flags);
mutex_unlock(&epc->lock);
if (interrupt < 0)
return 0;
@ -305,13 +297,15 @@ EXPORT_SYMBOL_GPL(pci_epc_get_msix);
* @epc: the EPC device on which MSI-X has to be configured
* @func_no: the endpoint function number in the EPC device
* @interrupts: number of MSI-X interrupts required by the EPF
* @bir: BAR where the MSI-X table resides
* @offset: Offset pointing to the start of MSI-X table
*
* Invoke to set the required number of MSI-X interrupts.
*/
int pci_epc_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts)
int pci_epc_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts,
enum pci_barno bir, u32 offset)
{
int ret;
unsigned long flags;
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
interrupts < 1 || interrupts > 2048)
@ -320,9 +314,9 @@ int pci_epc_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts)
if (!epc->ops->set_msix)
return 0;
spin_lock_irqsave(&epc->lock, flags);
ret = epc->ops->set_msix(epc, func_no, interrupts - 1);
spin_unlock_irqrestore(&epc->lock, flags);
mutex_lock(&epc->lock);
ret = epc->ops->set_msix(epc, func_no, interrupts - 1, bir, offset);
mutex_unlock(&epc->lock);
return ret;
}
@ -339,17 +333,15 @@ EXPORT_SYMBOL_GPL(pci_epc_set_msix);
void pci_epc_unmap_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t phys_addr)
{
unsigned long flags;
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return;
if (!epc->ops->unmap_addr)
return;
spin_lock_irqsave(&epc->lock, flags);
mutex_lock(&epc->lock);
epc->ops->unmap_addr(epc, func_no, phys_addr);
spin_unlock_irqrestore(&epc->lock, flags);
mutex_unlock(&epc->lock);
}
EXPORT_SYMBOL_GPL(pci_epc_unmap_addr);
@ -367,7 +359,6 @@ int pci_epc_map_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t phys_addr, u64 pci_addr, size_t size)
{
int ret;
unsigned long flags;
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return -EINVAL;
@ -375,9 +366,9 @@ int pci_epc_map_addr(struct pci_epc *epc, u8 func_no,
if (!epc->ops->map_addr)
return 0;
spin_lock_irqsave(&epc->lock, flags);
mutex_lock(&epc->lock);
ret = epc->ops->map_addr(epc, func_no, phys_addr, pci_addr, size);
spin_unlock_irqrestore(&epc->lock, flags);
mutex_unlock(&epc->lock);
return ret;
}
@ -394,8 +385,6 @@ EXPORT_SYMBOL_GPL(pci_epc_map_addr);
void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no,
struct pci_epf_bar *epf_bar)
{
unsigned long flags;
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
(epf_bar->barno == BAR_5 &&
epf_bar->flags & PCI_BASE_ADDRESS_MEM_TYPE_64))
@ -404,9 +393,9 @@ void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no,
if (!epc->ops->clear_bar)
return;
spin_lock_irqsave(&epc->lock, flags);
mutex_lock(&epc->lock);
epc->ops->clear_bar(epc, func_no, epf_bar);
spin_unlock_irqrestore(&epc->lock, flags);
mutex_unlock(&epc->lock);
}
EXPORT_SYMBOL_GPL(pci_epc_clear_bar);
@ -422,7 +411,6 @@ int pci_epc_set_bar(struct pci_epc *epc, u8 func_no,
struct pci_epf_bar *epf_bar)
{
int ret;
unsigned long irq_flags;
int flags = epf_bar->flags;
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
@ -437,9 +425,9 @@ int pci_epc_set_bar(struct pci_epc *epc, u8 func_no,
if (!epc->ops->set_bar)
return 0;
spin_lock_irqsave(&epc->lock, irq_flags);
mutex_lock(&epc->lock);
ret = epc->ops->set_bar(epc, func_no, epf_bar);
spin_unlock_irqrestore(&epc->lock, irq_flags);
mutex_unlock(&epc->lock);
return ret;
}
@ -460,7 +448,6 @@ int pci_epc_write_header(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *header)
{
int ret;
unsigned long flags;
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return -EINVAL;
@ -468,9 +455,9 @@ int pci_epc_write_header(struct pci_epc *epc, u8 func_no,
if (!epc->ops->write_header)
return 0;
spin_lock_irqsave(&epc->lock, flags);
mutex_lock(&epc->lock);
ret = epc->ops->write_header(epc, func_no, header);
spin_unlock_irqrestore(&epc->lock, flags);
mutex_unlock(&epc->lock);
return ret;
}
@ -487,7 +474,8 @@ EXPORT_SYMBOL_GPL(pci_epc_write_header);
*/
int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf)
{
unsigned long flags;
u32 func_no;
int ret = 0;
if (epf->epc)
return -EBUSY;
@ -495,16 +483,30 @@ int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf)
if (IS_ERR(epc))
return -EINVAL;
if (epf->func_no > epc->max_functions - 1)
return -EINVAL;
mutex_lock(&epc->lock);
func_no = find_first_zero_bit(&epc->function_num_map,
BITS_PER_LONG);
if (func_no >= BITS_PER_LONG) {
ret = -EINVAL;
goto ret;
}
if (func_no > epc->max_functions - 1) {
dev_err(&epc->dev, "Exceeding max supported Function Number\n");
ret = -EINVAL;
goto ret;
}
set_bit(func_no, &epc->function_num_map);
epf->func_no = func_no;
epf->epc = epc;
spin_lock_irqsave(&epc->lock, flags);
list_add_tail(&epf->list, &epc->pci_epf);
spin_unlock_irqrestore(&epc->lock, flags);
return 0;
ret:
mutex_unlock(&epc->lock);
return ret;
}
EXPORT_SYMBOL_GPL(pci_epc_add_epf);
@ -517,15 +519,14 @@ EXPORT_SYMBOL_GPL(pci_epc_add_epf);
*/
void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf)
{
unsigned long flags;
if (!epc || IS_ERR(epc) || !epf)
return;
spin_lock_irqsave(&epc->lock, flags);
mutex_lock(&epc->lock);
clear_bit(epf->func_no, &epc->function_num_map);
list_del(&epf->list);
epf->epc = NULL;
spin_unlock_irqrestore(&epc->lock, flags);
mutex_unlock(&epc->lock);
}
EXPORT_SYMBOL_GPL(pci_epc_remove_epf);
@ -539,19 +540,30 @@ EXPORT_SYMBOL_GPL(pci_epc_remove_epf);
*/
void pci_epc_linkup(struct pci_epc *epc)
{
unsigned long flags;
struct pci_epf *epf;
if (!epc || IS_ERR(epc))
return;
spin_lock_irqsave(&epc->lock, flags);
list_for_each_entry(epf, &epc->pci_epf, list)
pci_epf_linkup(epf);
spin_unlock_irqrestore(&epc->lock, flags);
atomic_notifier_call_chain(&epc->notifier, LINK_UP, NULL);
}
EXPORT_SYMBOL_GPL(pci_epc_linkup);
/**
* pci_epc_init_notify() - Notify the EPF device that EPC device's core
* initialization is completed.
* @epc: the EPC device whose core initialization is completeds
*
* Invoke to Notify the EPF device that the EPC device's initialization
* is completed.
*/
void pci_epc_init_notify(struct pci_epc *epc)
{
if (!epc || IS_ERR(epc))
return;
atomic_notifier_call_chain(&epc->notifier, CORE_INIT, NULL);
}
EXPORT_SYMBOL_GPL(pci_epc_init_notify);
/**
* pci_epc_destroy() - destroy the EPC device
* @epc: the EPC device that has to be destroyed
@ -610,8 +622,9 @@ __pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
goto err_ret;
}
spin_lock_init(&epc->lock);
mutex_init(&epc->lock);
INIT_LIST_HEAD(&epc->pci_epf);
ATOMIC_INIT_NOTIFIER_HEAD(&epc->notifier);
device_initialize(&epc->dev);
epc->dev.class = pci_epc_class;

10
drivers/pci/endpoint/pci-epc-mem.c
View File

@ -79,6 +79,7 @@ int __pci_epc_mem_init(struct pci_epc *epc, phys_addr_t phys_base, size_t size,
mem->page_size = page_size;
mem->pages = pages;
mem->size = size;
mutex_init(&mem->lock);
epc->mem = mem;
@ -122,7 +123,7 @@ void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc,
phys_addr_t *phys_addr, size_t size)
{
int pageno;
void __iomem *virt_addr;
void __iomem *virt_addr = NULL;
struct pci_epc_mem *mem = epc->mem;
unsigned int page_shift = ilog2(mem->page_size);
int order;
@ -130,15 +131,18 @@ void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc,
size = ALIGN(size, mem->page_size);
order = pci_epc_mem_get_order(mem, size);
mutex_lock(&mem->lock);
pageno = bitmap_find_free_region(mem->bitmap, mem->pages, order);
if (pageno < 0)
return NULL;
goto ret;
*phys_addr = mem->phys_base + ((phys_addr_t)pageno << page_shift);
virt_addr = ioremap(*phys_addr, size);
if (!virt_addr)
bitmap_release_region(mem->bitmap, pageno, order);
ret:
mutex_unlock(&mem->lock);
return virt_addr;
}
EXPORT_SYMBOL_GPL(pci_epc_mem_alloc_addr);
@ -164,7 +168,9 @@ void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr,
pageno = (phys_addr - mem->phys_base) >> page_shift;
size = ALIGN(size, mem->page_size);
order = pci_epc_mem_get_order(mem, size);
mutex_lock(&mem->lock);
bitmap_release_region(mem->bitmap, pageno, order);
mutex_unlock(&mem->lock);
}
EXPORT_SYMBOL_GPL(pci_epc_mem_free_addr);

35
drivers/pci/endpoint/pci-epf-core.c
View File

@ -20,26 +20,6 @@ static DEFINE_MUTEX(pci_epf_mutex);
static struct bus_type pci_epf_bus_type;
static const struct device_type pci_epf_type;
/**
* pci_epf_linkup() - Notify the function driver that EPC device has
* established a connection with the Root Complex.
* @epf: the EPF device bound to the EPC device which has established
* the connection with the host
*
* Invoke to notify the function driver that EPC device has established
* a connection with the Root Complex.
*/
void pci_epf_linkup(struct pci_epf *epf)
{
if (!epf->driver) {
dev_WARN(&epf->dev, "epf device not bound to driver\n");
return;
}
epf->driver->ops->linkup(epf);
}
EXPORT_SYMBOL_GPL(pci_epf_linkup);
/**
* pci_epf_unbind() - Notify the function driver that the binding between the
* EPF device and EPC device has been lost
@ -55,7 +35,9 @@ void pci_epf_unbind(struct pci_epf *epf)
return;
}
mutex_lock(&epf->lock);
epf->driver->ops->unbind(epf);
mutex_unlock(&epf->lock);
module_put(epf->driver->owner);
}
EXPORT_SYMBOL_GPL(pci_epf_unbind);
@ -69,6 +51,8 @@ EXPORT_SYMBOL_GPL(pci_epf_unbind);
*/
int pci_epf_bind(struct pci_epf *epf)
{
int ret;
if (!epf->driver) {
dev_WARN(&epf->dev, "epf device not bound to driver\n");
return -EINVAL;
@ -77,7 +61,11 @@ int pci_epf_bind(struct pci_epf *epf)
if (!try_module_get(epf->driver->owner))
return -EAGAIN;
return epf->driver->ops->bind(epf);
mutex_lock(&epf->lock);
ret = epf->driver->ops->bind(epf);
mutex_unlock(&epf->lock);
return ret;
}
EXPORT_SYMBOL_GPL(pci_epf_bind);
@ -99,6 +87,7 @@ void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar)
epf->bar[bar].phys_addr);
epf->bar[bar].phys_addr = 0;
epf->bar[bar].addr = NULL;
epf->bar[bar].size = 0;
epf->bar[bar].barno = 0;
epf->bar[bar].flags = 0;
@ -135,6 +124,7 @@ void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar,
}
epf->bar[bar].phys_addr = phys_addr;
epf->bar[bar].addr = space;
epf->bar[bar].size = size;
epf->bar[bar].barno = bar;
epf->bar[bar].flags |= upper_32_bits(size) ?
@ -214,7 +204,7 @@ int __pci_epf_register_driver(struct pci_epf_driver *driver,
if (!driver->ops)
return -EINVAL;
if (!driver->ops->bind || !driver->ops->unbind || !driver->ops->linkup)
if (!driver->ops->bind || !driver->ops->unbind)
return -EINVAL;
driver->driver.bus = &pci_epf_bus_type;
@ -272,6 +262,7 @@ struct pci_epf *pci_epf_create(const char *name)
device_initialize(dev);
dev->bus = &pci_epf_bus_type;
dev->type = &pci_epf_type;
mutex_init(&epf->lock);
ret = dev_set_name(dev, "%s", name);
if (ret) {

1
drivers/pci/hotplug/pciehp.h
View File

@ -84,6 +84,7 @@ struct controller {
struct pcie_device *pcie;
u32 slot_cap; /* capabilities and quirks */
unsigned int inband_presence_disabled:1;
u16 slot_ctrl; /* control register access */
struct mutex ctrl_lock;

93
drivers/pci/hotplug/pciehp_hpc.c
View File

@ -14,6 +14,7 @@
#define dev_fmt(fmt) "pciehp: " fmt
#include <linux/dmi.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/jiffies.h>
@ -26,6 +27,24 @@
#include "../pci.h"
#include "pciehp.h"
static const struct dmi_system_id inband_presence_disabled_dmi_table[] = {
/*
* Match all Dell systems, as some Dell systems have inband
* presence disabled on NVMe slots (but don't support the bit to
* report it). Setting inband presence disabled should have no
* negative effect, except on broken hotplug slots that never
* assert presence detect--and those will still work, they will
* just have a bit of extra delay before being probed.
*/
{
.ident = "Dell System",
.matches = {
DMI_MATCH(DMI_OEM_STRING, "Dell System"),
},
},
{}
};
static inline struct pci_dev *ctrl_dev(struct controller *ctrl)
{
return ctrl->pcie->port;
@ -252,6 +271,22 @@ static bool pci_bus_check_dev(struct pci_bus *bus, int devfn)
return found;
}
static void pcie_wait_for_presence(struct pci_dev *pdev)
{
int timeout = 1250;
u16 slot_status;
do {
pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &slot_status);
if (slot_status & PCI_EXP_SLTSTA_PDS)
return;
msleep(10);
timeout -= 10;
} while (timeout > 0);
pci_info(pdev, "Timeout waiting for Presence Detect\n");
}
int pciehp_check_link_status(struct controller *ctrl)
{
struct pci_dev *pdev = ctrl_dev(ctrl);
@ -261,6 +296,9 @@ int pciehp_check_link_status(struct controller *ctrl)
if (!pcie_wait_for_link(pdev, true))
return -1;
if (ctrl->inband_presence_disabled)
pcie_wait_for_presence(pdev);
found = pci_bus_check_dev(ctrl->pcie->port->subordinate,
PCI_DEVFN(0, 0));
@ -527,7 +565,7 @@ static irqreturn_t pciehp_isr(int irq, void *dev_id)
struct controller *ctrl = (struct controller *)dev_id;
struct pci_dev *pdev = ctrl_dev(ctrl);
struct device *parent = pdev->dev.parent;
u16 status, events;
u16 status, events = 0;
/*
* Interrupts only occur in D3hot or shallower and only if enabled
@ -552,6 +590,7 @@ static irqreturn_t pciehp_isr(int irq, void *dev_id)
}
}
read_status:
pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &status);
if (status == (u16) ~0) {
ctrl_info(ctrl, "%s: no response from device\n", __func__);
@ -564,24 +603,37 @@ static irqreturn_t pciehp_isr(int irq, void *dev_id)
* Slot Status contains plain status bits as well as event
* notification bits; right now we only want the event bits.
*/
events = status & (PCI_EXP_SLTSTA_ABP | PCI_EXP_SLTSTA_PFD |
PCI_EXP_SLTSTA_PDC | PCI_EXP_SLTSTA_CC |
PCI_EXP_SLTSTA_DLLSC);
status &= PCI_EXP_SLTSTA_ABP | PCI_EXP_SLTSTA_PFD |
PCI_EXP_SLTSTA_PDC | PCI_EXP_SLTSTA_CC |
PCI_EXP_SLTSTA_DLLSC;
/*
* If we've already reported a power fault, don't report it again
* until we've done something to handle it.
*/
if (ctrl->power_fault_detected)
events &= ~PCI_EXP_SLTSTA_PFD;
status &= ~PCI_EXP_SLTSTA_PFD;
events |= status;
if (!events) {
if (parent)
pm_runtime_put(parent);
return IRQ_NONE;
}
pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, events);
if (status) {
pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, events);
/*
* In MSI mode, all event bits must be zero before the port
* will send a new interrupt (PCIe Base Spec r5.0 sec 6.7.3.4).
* So re-read the Slot Status register in case a bit was set
* between read and write.
*/
if (pci_dev_msi_enabled(pdev) && !pciehp_poll_mode)
goto read_status;
}
ctrl_dbg(ctrl, "pending interrupts %#06x from Slot Status\n", events);
if (parent)
pm_runtime_put(parent);
@ -625,17 +677,15 @@ static irqreturn_t pciehp_ist(int irq, void *dev_id)
if (atomic_fetch_and(~RERUN_ISR, &ctrl->pending_events) & RERUN_ISR) {
ret = pciehp_isr(irq, dev_id);
enable_irq(irq);
if (ret != IRQ_WAKE_THREAD) {
pci_config_pm_runtime_put(pdev);
return ret;
}
if (ret != IRQ_WAKE_THREAD)
goto out;
}
synchronize_hardirq(irq);
events = atomic_xchg(&ctrl->pending_events, 0);
if (!events) {
pci_config_pm_runtime_put(pdev);
return IRQ_NONE;
ret = IRQ_NONE;
goto out;
}
/* Check Attention Button Pressed */
@ -664,10 +714,12 @@ static irqreturn_t pciehp_ist(int irq, void *dev_id)
pciehp_handle_presence_or_link_change(ctrl, events);
up_read(&ctrl->reset_lock);
ret = IRQ_HANDLED;
out:
pci_config_pm_runtime_put(pdev);
ctrl->ist_running = false;
wake_up(&ctrl->requester);
return IRQ_HANDLED;
return ret;
}
static int pciehp_poll(void *data)
@ -848,7 +900,7 @@ static inline void dbg_ctrl(struct controller *ctrl)
struct controller *pcie_init(struct pcie_device *dev)
{
struct controller *ctrl;
u32 slot_cap, link_cap;
u32 slot_cap, slot_cap2, link_cap;
u8 poweron;
struct pci_dev *pdev = dev->port;
struct pci_bus *subordinate = pdev->subordinate;
@ -883,6 +935,16 @@ struct controller *pcie_init(struct pcie_device *dev)
ctrl->state = list_empty(&subordinate->devices) ? OFF_STATE : ON_STATE;
up_read(&pci_bus_sem);
pcie_capability_read_dword(pdev, PCI_EXP_SLTCAP2, &slot_cap2);
if (slot_cap2 & PCI_EXP_SLTCAP2_IBPD) {
pcie_write_cmd_nowait(ctrl, PCI_EXP_SLTCTL_IBPD_DISABLE,
PCI_EXP_SLTCTL_IBPD_DISABLE);
ctrl->inband_presence_disabled = 1;
}
if (dmi_first_match(inband_presence_disabled_dmi_table))
ctrl->inband_presence_disabled = 1;
/* Check if Data Link Layer Link Active Reporting is implemented */
pcie_capability_read_dword(pdev, PCI_EXP_LNKCAP, &link_cap);
@ -892,7 +954,7 @@ struct controller *pcie_init(struct pcie_device *dev)
PCI_EXP_SLTSTA_MRLSC | PCI_EXP_SLTSTA_CC |
PCI_EXP_SLTSTA_DLLSC | PCI_EXP_SLTSTA_PDC);
ctrl_info(ctrl, "Slot #%d AttnBtn%c PwrCtrl%c MRL%c AttnInd%c PwrInd%c HotPlug%c Surprise%c Interlock%c NoCompl%c LLActRep%c%s\n",
ctrl_info(ctrl, "Slot #%d AttnBtn%c PwrCtrl%c MRL%c AttnInd%c PwrInd%c HotPlug%c Surprise%c Interlock%c NoCompl%c IbPresDis%c LLActRep%c%s\n",
(slot_cap & PCI_EXP_SLTCAP_PSN) >> 19,
FLAG(slot_cap, PCI_EXP_SLTCAP_ABP),
FLAG(slot_cap, PCI_EXP_SLTCAP_PCP),
@ -903,6 +965,7 @@ struct controller *pcie_init(struct pcie_device *dev)
FLAG(slot_cap, PCI_EXP_SLTCAP_HPS),
FLAG(slot_cap, PCI_EXP_SLTCAP_EIP),
FLAG(slot_cap, PCI_EXP_SLTCAP_NCCS),
FLAG(slot_cap2, PCI_EXP_SLTCAP2_IBPD),
FLAG(link_cap, PCI_EXP_LNKCAP_DLLLARC),
pdev->broken_cmd_compl ? " (with Cmd Compl erratum)" : "");

3
drivers/pci/p2pdma.c
View File

@ -291,6 +291,9 @@ static const struct pci_p2pdma_whitelist_entry {
{PCI_VENDOR_ID_INTEL, 0x2f01, REQ_SAME_HOST_BRIDGE},
/* Intel SkyLake-E */
{PCI_VENDOR_ID_INTEL, 0x2030, 0},
{PCI_VENDOR_ID_INTEL, 0x2031, 0},
{PCI_VENDOR_ID_INTEL, 0x2032, 0},
{PCI_VENDOR_ID_INTEL, 0x2033, 0},
{PCI_VENDOR_ID_INTEL, 0x2020, 0},
{}
};

4
drivers/pci/pci-acpi.c
View File

@ -439,7 +439,7 @@ enum hpx_type3_dev_type {
static u16 hpx3_device_type(struct pci_dev *dev)
{
u16 pcie_type = pci_pcie_type(dev);
const int pcie_to_hpx3_type[] = {
static const int pcie_to_hpx3_type[] = {
[PCI_EXP_TYPE_ENDPOINT] = HPX_TYPE_ENDPOINT,
[PCI_EXP_TYPE_LEG_END] = HPX_TYPE_LEG_END,
[PCI_EXP_TYPE_RC_END] = HPX_TYPE_RC_END,
@ -1241,6 +1241,7 @@ static void pci_acpi_setup(struct device *dev)
pci_acpi_optimize_delay(pci_dev, adev->handle);
pci_acpi_set_untrusted(pci_dev);
pci_acpi_add_edr_notifier(pci_dev);
pci_acpi_add_pm_notifier(adev, pci_dev);
if (!adev->wakeup.flags.valid)
@ -1268,6 +1269,7 @@ static void pci_acpi_cleanup(struct device *dev)
if (!adev)
return;
pci_acpi_remove_edr_notifier(pci_dev);
pci_acpi_remove_pm_notifier(adev);
if (adev->wakeup.flags.valid) {
acpi_device_power_remove_dependent(adev, dev);

33
drivers/pci/pci-sysfs.c
View File

@ -156,7 +156,8 @@ static ssize_t max_link_speed_show(struct device *dev,
{
struct pci_dev *pdev = to_pci_dev(dev);
return sprintf(buf, "%s\n", PCIE_SPEED2STR(pcie_get_speed_cap(pdev)));
return sprintf(buf, "%s\n",
pci_speed_string(pcie_get_speed_cap(pdev)));
}
static DEVICE_ATTR_RO(max_link_speed);
@ -175,33 +176,15 @@ static ssize_t current_link_speed_show(struct device *dev,
struct pci_dev *pci_dev = to_pci_dev(dev);
u16 linkstat;
int err;
const char *speed;
enum pci_bus_speed speed;
err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat);
if (err)
return -EINVAL;
switch (linkstat & PCI_EXP_LNKSTA_CLS) {
case PCI_EXP_LNKSTA_CLS_32_0GB:
speed = "32 GT/s";
break;
case PCI_EXP_LNKSTA_CLS_16_0GB:
speed = "16 GT/s";
break;
case PCI_EXP_LNKSTA_CLS_8_0GB:
speed = "8 GT/s";
break;
case PCI_EXP_LNKSTA_CLS_5_0GB:
speed = "5 GT/s";
break;
case PCI_EXP_LNKSTA_CLS_2_5GB:
speed = "2.5 GT/s";
break;
default:
speed = "Unknown speed";
}
speed = pcie_link_speed[linkstat & PCI_EXP_LNKSTA_CLS];
return sprintf(buf, "%s\n", speed);
return sprintf(buf, "%s\n", pci_speed_string(speed));
}
static DEVICE_ATTR_RO(current_link_speed);
@ -464,7 +447,8 @@ static ssize_t dev_rescan_store(struct device *dev,
}
return count;
}
static DEVICE_ATTR_WO(dev_rescan);
static struct device_attribute dev_attr_dev_rescan = __ATTR(rescan, 0200, NULL,
dev_rescan_store);
static ssize_t remove_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
@ -501,7 +485,8 @@ static ssize_t bus_rescan_store(struct device *dev,
}
return count;
}
static DEVICE_ATTR_WO(bus_rescan);
static struct device_attribute dev_attr_bus_rescan = __ATTR(rescan, 0200, NULL,
bus_rescan_store);
#if defined(CONFIG_PM) && defined(CONFIG_ACPI)
static ssize_t d3cold_allowed_store(struct device *dev,

25
drivers/pci/pci.c
View File

@ -1560,7 +1560,7 @@ void pci_restore_state(struct pci_dev *dev)
pci_restore_rebar_state(dev);
pci_restore_dpc_state(dev);
pci_cleanup_aer_error_status_regs(dev);
pci_aer_clear_status(dev);
pci_restore_aer_state(dev);
pci_restore_config_space(dev);
@ -5841,19 +5841,10 @@ enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev)
* where only 2.5 GT/s and 5.0 GT/s speeds were defined.
*/
pcie_capability_read_dword(dev, PCI_EXP_LNKCAP2, &lnkcap2);
if (lnkcap2) { /* PCIe r3.0-compliant */
if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_32_0GB)
return PCIE_SPEED_32_0GT;
else if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_16_0GB)
return PCIE_SPEED_16_0GT;
else if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB)
return PCIE_SPEED_8_0GT;
else if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB)
return PCIE_SPEED_5_0GT;
else if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB)
return PCIE_SPEED_2_5GT;
return PCI_SPEED_UNKNOWN;
}
/* PCIe r3.0-compliant */
if (lnkcap2)
return PCIE_LNKCAP2_SLS2SPEED(lnkcap2);
pcie_capability_read_dword(dev, PCI_EXP_LNKCAP, &lnkcap);
if ((lnkcap & PCI_EXP_LNKCAP_SLS) == PCI_EXP_LNKCAP_SLS_5_0GB)
@ -5929,14 +5920,14 @@ void __pcie_print_link_status(struct pci_dev *dev, bool verbose)
if (bw_avail >= bw_cap && verbose)
pci_info(dev, "%u.%03u Gb/s available PCIe bandwidth (%s x%d link)\n",
bw_cap / 1000, bw_cap % 1000,
PCIE_SPEED2STR(speed_cap), width_cap);
pci_speed_string(speed_cap), width_cap);
else if (bw_avail < bw_cap)
pci_info(dev, "%u.%03u Gb/s available PCIe bandwidth, limited by %s x%d link at %s (capable of %u.%03u Gb/s with %s x%d link)\n",
bw_avail / 1000, bw_avail % 1000,
PCIE_SPEED2STR(speed), width,
pci_speed_string(speed), width,
limiting_dev ? pci_name(limiting_dev) : "<unknown>",
bw_cap / 1000, bw_cap % 1000,
PCIE_SPEED2STR(speed_cap), width_cap);
pci_speed_string(speed_cap), width_cap);
}
/**

32
drivers/pci/pci.h
View File

@ -292,22 +292,25 @@ void pci_disable_bridge_window(struct pci_dev *dev);
struct pci_bus *pci_bus_get(struct pci_bus *bus);
void pci_bus_put(struct pci_bus *bus);
/* PCIe link information */
#define PCIE_SPEED2STR(speed) \
((speed) == PCIE_SPEED_16_0GT ? "16 GT/s" : \
(speed) == PCIE_SPEED_8_0GT ? "8 GT/s" : \
(speed) == PCIE_SPEED_5_0GT ? "5 GT/s" : \
(speed) == PCIE_SPEED_2_5GT ? "2.5 GT/s" : \
"Unknown speed")
/* PCIe link information from Link Capabilities 2 */
#define PCIE_LNKCAP2_SLS2SPEED(lnkcap2) \
((lnkcap2) & PCI_EXP_LNKCAP2_SLS_32_0GB ? PCIE_SPEED_32_0GT : \
(lnkcap2) & PCI_EXP_LNKCAP2_SLS_16_0GB ? PCIE_SPEED_16_0GT : \
(lnkcap2) & PCI_EXP_LNKCAP2_SLS_8_0GB ? PCIE_SPEED_8_0GT : \
(lnkcap2) & PCI_EXP_LNKCAP2_SLS_5_0GB ? PCIE_SPEED_5_0GT : \
(lnkcap2) & PCI_EXP_LNKCAP2_SLS_2_5GB ? PCIE_SPEED_2_5GT : \
PCI_SPEED_UNKNOWN)
/* PCIe speed to Mb/s reduced by encoding overhead */
#define PCIE_SPEED2MBS_ENC(speed) \
((speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \
((speed) == PCIE_SPEED_32_0GT ? 32000*128/130 : \
(speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \
(speed) == PCIE_SPEED_8_0GT ? 8000*128/130 : \
(speed) == PCIE_SPEED_5_0GT ? 5000*8/10 : \
(speed) == PCIE_SPEED_2_5GT ? 2500*8/10 : \
0)
const char *pci_speed_string(enum pci_bus_speed speed);
enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
u32 pcie_bandwidth_capable(struct pci_dev *dev, enum pci_bus_speed *speed,
@ -448,9 +451,13 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
#ifdef CONFIG_PCIE_DPC
void pci_save_dpc_state(struct pci_dev *dev);
void pci_restore_dpc_state(struct pci_dev *dev);
void pci_dpc_init(struct pci_dev *pdev);
void dpc_process_error(struct pci_dev *pdev);
pci_ers_result_t dpc_reset_link(struct pci_dev *pdev);
#else
static inline void pci_save_dpc_state(struct pci_dev *dev) {}
static inline void pci_restore_dpc_state(struct pci_dev *dev) {}
static inline void pci_dpc_init(struct pci_dev *pdev) {}
#endif
#ifdef CONFIG_PCI_ATS
@ -547,8 +554,9 @@ static inline int pci_dev_specific_disable_acs_redir(struct pci_dev *dev)
#endif
/* PCI error reporting and recovery */
void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state,
u32 service);
pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
enum pci_channel_state state,
pci_ers_result_t (*reset_link)(struct pci_dev *pdev));
bool pcie_wait_for_link(struct pci_dev *pdev, bool active);
#ifdef CONFIG_PCIEASPM
@ -651,12 +659,16 @@ void pci_aer_exit(struct pci_dev *dev);
extern const struct attribute_group aer_stats_attr_group;
void pci_aer_clear_fatal_status(struct pci_dev *dev);
void pci_aer_clear_device_status(struct pci_dev *dev);
int pci_aer_clear_status(struct pci_dev *dev);
int pci_aer_raw_clear_status(struct pci_dev *dev);
#else
static inline void pci_no_aer(void) { }
static inline void pci_aer_init(struct pci_dev *d) { }
static inline void pci_aer_exit(struct pci_dev *d) { }
static inline void pci_aer_clear_fatal_status(struct pci_dev *dev) { }
static inline void pci_aer_clear_device_status(struct pci_dev *dev) { }
static inline int pci_aer_clear_status(struct pci_dev *dev) { return -EINVAL; }
static inline int pci_aer_raw_clear_status(struct pci_dev *dev) { return -EINVAL; }
#endif
#ifdef CONFIG_ACPI

10
drivers/pci/pcie/Kconfig
View File

@ -141,3 +141,13 @@ config PCIE_BW
This enables PCI Express Bandwidth Change Notification. If
you know link width or rate changes occur only to correct
unreliable links, you may answer Y.
config PCIE_EDR
bool "PCI Express Error Disconnect Recover support"
depends on PCIE_DPC && ACPI
help
This option adds Error Disconnect Recover support as specified
in the Downstream Port Containment Related Enhancements ECN to
the PCI Firmware Specification r3.2. Enable this if you want to
support hybrid DPC model which uses both firmware and OS to
implement DPC.

1
drivers/pci/pcie/Makefile
View File

@ -13,3 +13,4 @@ obj-$(CONFIG_PCIE_PME) += pme.o
obj-$(CONFIG_PCIE_DPC) += dpc.o
obj-$(CONFIG_PCIE_PTM) += ptm.o
obj-$(CONFIG_PCIE_BW) += bw_notification.o
obj-$(CONFIG_PCIE_EDR) += edr.o

40
drivers/pci/pcie/aer.c
View File

@ -102,6 +102,7 @@ struct aer_stats {
#define ERR_UNCOR_ID(d) (d >> 16)
static int pcie_aer_disable;
static pci_ers_result_t aer_root_reset(struct pci_dev *dev);
void pci_no_aer(void)
{
@ -376,7 +377,7 @@ void pci_aer_clear_device_status(struct pci_dev *dev)
pcie_capability_write_word(dev, PCI_EXP_DEVSTA, sta);
}
int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
int pci_aer_clear_nonfatal_status(struct pci_dev *dev)
{
int pos;
u32 status, sev;
@ -397,7 +398,7 @@ int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
return 0;
}
EXPORT_SYMBOL_GPL(pci_cleanup_aer_uncorrect_error_status);
EXPORT_SYMBOL_GPL(pci_aer_clear_nonfatal_status);
void pci_aer_clear_fatal_status(struct pci_dev *dev)
{
@ -419,7 +420,16 @@ void pci_aer_clear_fatal_status(struct pci_dev *dev)
pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
}
int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
/**
* pci_aer_raw_clear_status - Clear AER error registers.
* @dev: the PCI device
*
* Clearing AER error status registers unconditionally, regardless of
* whether they're owned by firmware or the OS.
*
* Returns 0 on success, or negative on failure.
*/
int pci_aer_raw_clear_status(struct pci_dev *dev)
{
int pos;
u32 status;
@ -432,9 +442,6 @@ int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
if (!pos)
return -EIO;
if (pcie_aer_get_firmware_first(dev))
return -EIO;
port_type = pci_pcie_type(dev);
if (port_type == PCI_EXP_TYPE_ROOT_PORT) {
pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, &status);
@ -450,6 +457,14 @@ int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
return 0;
}
int pci_aer_clear_status(struct pci_dev *dev)
{
if (pcie_aer_get_firmware_first(dev))
return -EIO;
return pci_aer_raw_clear_status(dev);
}
void pci_save_aer_state(struct pci_dev *dev)
{
struct pci_cap_saved_state *save_state;
@ -515,7 +530,7 @@ void pci_aer_init(struct pci_dev *dev)
n = pcie_cap_has_rtctl(dev) ? 5 : 4;
pci_add_ext_cap_save_buffer(dev, PCI_EXT_CAP_ID_ERR, sizeof(u32) * n);
pci_cleanup_aer_error_status_regs(dev);
pci_aer_clear_status(dev);
}
void pci_aer_exit(struct pci_dev *dev)
@ -1053,11 +1068,9 @@ static void handle_error_source(struct pci_dev *dev, struct aer_err_info *info)
info->status);
pci_aer_clear_device_status(dev);
} else if (info->severity == AER_NONFATAL)
pcie_do_recovery(dev, pci_channel_io_normal,
PCIE_PORT_SERVICE_AER);
pcie_do_recovery(dev, pci_channel_io_normal, aer_root_reset);
else if (info->severity == AER_FATAL)
pcie_do_recovery(dev, pci_channel_io_frozen,
PCIE_PORT_SERVICE_AER);
pcie_do_recovery(dev, pci_channel_io_frozen, aer_root_reset);
pci_dev_put(dev);
}
@ -1094,10 +1107,10 @@ static void aer_recover_work_func(struct work_struct *work)
cper_print_aer(pdev, entry.severity, entry.regs);
if (entry.severity == AER_NONFATAL)
pcie_do_recovery(pdev, pci_channel_io_normal,
PCIE_PORT_SERVICE_AER);
aer_root_reset);
else if (entry.severity == AER_FATAL)
pcie_do_recovery(pdev, pci_channel_io_frozen,
PCIE_PORT_SERVICE_AER);
aer_root_reset);
pci_dev_put(pdev);
}
}
@ -1501,7 +1514,6 @@ static struct pcie_port_service_driver aerdriver = {
.probe = aer_probe,
.remove = aer_remove,
.reset_link = aer_root_reset,
};
/**

6
drivers/pci/pcie/aspm.c
View File

@ -273,7 +273,7 @@ static void pcie_aspm_configure_common_clock(struct pcie_link_state *link)
}
if (consistent)
return;
pci_warn(parent, "ASPM: current common clock configuration is broken, reconfiguring\n");
pci_info(parent, "ASPM: current common clock configuration is inconsistent, reconfiguring\n");
}
/* Configure downstream component, all functions */
@ -747,9 +747,9 @@ static void pcie_config_aspm_l1ss(struct pcie_link_state *link, u32 state)
/* Enable what we need to enable */
pci_clear_and_set_dword(parent, up_cap_ptr + PCI_L1SS_CTL1,
PCI_L1SS_CAP_L1_PM_SS, val);
PCI_L1SS_CTL1_L1SS_MASK, val);
pci_clear_and_set_dword(child, dw_cap_ptr + PCI_L1SS_CTL1,
PCI_L1SS_CAP_L1_PM_SS, val);
PCI_L1SS_CTL1_L1SS_MASK, val);
}
static void pcie_config_aspm_dev(struct pci_dev *pdev, u32 val)

137
drivers/pci/pcie/dpc.c
View File

@ -17,13 +17,6 @@
#include "portdrv.h"
#include "../pci.h"
struct dpc_dev {
struct pcie_device *dev;
u16 cap_pos;
bool rp_extensions;
u8 rp_log_size;
};
static const char * const rp_pio_error_string[] = {
"Configuration Request received UR Completion", /* Bit Position 0 */
"Configuration Request received CA Completion", /* Bit Position 1 */
@ -46,63 +39,42 @@ static const char * const rp_pio_error_string[] = {
"Memory Request Completion Timeout", /* Bit Position 18 */
};
static struct dpc_dev *to_dpc_dev(struct pci_dev *dev)
{
struct device *device;
device = pcie_port_find_device(dev, PCIE_PORT_SERVICE_DPC);
if (!device)
return NULL;
return get_service_data(to_pcie_device(device));
}
void pci_save_dpc_state(struct pci_dev *dev)
{
struct dpc_dev *dpc;
struct pci_cap_saved_state *save_state;
u16 *cap;
if (!pci_is_pcie(dev))
return;
dpc = to_dpc_dev(dev);
if (!dpc)
return;
save_state = pci_find_saved_ext_cap(dev, PCI_EXT_CAP_ID_DPC);
if (!save_state)
return;
cap = (u16 *)&save_state->cap.data[0];
pci_read_config_word(dev, dpc->cap_pos + PCI_EXP_DPC_CTL, cap);
pci_read_config_word(dev, dev->dpc_cap + PCI_EXP_DPC_CTL, cap);
}
void pci_restore_dpc_state(struct pci_dev *dev)
{
struct dpc_dev *dpc;
struct pci_cap_saved_state *save_state;
u16 *cap;
if (!pci_is_pcie(dev))
return;
dpc = to_dpc_dev(dev);
if (!dpc)
return;
save_state = pci_find_saved_ext_cap(dev, PCI_EXT_CAP_ID_DPC);
if (!save_state)
return;
cap = (u16 *)&save_state->cap.data[0];
pci_write_config_word(dev, dpc->cap_pos + PCI_EXP_DPC_CTL, *cap);
pci_write_config_word(dev, dev->dpc_cap + PCI_EXP_DPC_CTL, *cap);
}
static int dpc_wait_rp_inactive(struct dpc_dev *dpc)
static int dpc_wait_rp_inactive(struct pci_dev *pdev)
{
unsigned long timeout = jiffies + HZ;
struct pci_dev *pdev = dpc->dev->port;
u16 cap = dpc->cap_pos, status;
u16 cap = pdev->dpc_cap, status;
pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status);
while (status & PCI_EXP_DPC_RP_BUSY &&
@ -117,17 +89,15 @@ static int dpc_wait_rp_inactive(struct dpc_dev *dpc)
return 0;
}
static pci_ers_result_t dpc_reset_link(struct pci_dev *pdev)
pci_ers_result_t dpc_reset_link(struct pci_dev *pdev)
{
struct dpc_dev *dpc;
u16 cap;
/*
* DPC disables the Link automatically in hardware, so it has
* already been reset by the time we get here.
*/
dpc = to_dpc_dev(pdev);
cap = dpc->cap_pos;
cap = pdev->dpc_cap;
/*
* Wait until the Link is inactive, then clear DPC Trigger Status
@ -135,7 +105,7 @@ static pci_ers_result_t dpc_reset_link(struct pci_dev *pdev)
*/
pcie_wait_for_link(pdev, false);
if (dpc->rp_extensions && dpc_wait_rp_inactive(dpc))
if (pdev->dpc_rp_extensions && dpc_wait_rp_inactive(pdev))
return PCI_ERS_RESULT_DISCONNECT;
pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS,
@ -147,10 +117,9 @@ static pci_ers_result_t dpc_reset_link(struct pci_dev *pdev)
return PCI_ERS_RESULT_RECOVERED;
}
static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
static void dpc_process_rp_pio_error(struct pci_dev *pdev)
{
struct pci_dev *pdev = dpc->dev->port;
u16 cap = dpc->cap_pos, dpc_status, first_error;
u16 cap = pdev->dpc_cap, dpc_status, first_error;
u32 status, mask, sev, syserr, exc, dw0, dw1, dw2, dw3, log, prefix;
int i;
@ -175,7 +144,7 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
first_error == i ? " (First)" : "");
}
if (dpc->rp_log_size < 4)
if (pdev->dpc_rp_log_size < 4)
goto clear_status;
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG,
&dw0);
@ -188,12 +157,12 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
pci_err(pdev, "TLP Header: %#010x %#010x %#010x %#010x\n",
dw0, dw1, dw2, dw3);
if (dpc->rp_log_size < 5)
if (pdev->dpc_rp_log_size < 5)
goto clear_status;
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_IMPSPEC_LOG, &log);
pci_err(pdev, "RP PIO ImpSpec Log %#010x\n", log);
for (i = 0; i < dpc->rp_log_size - 5; i++) {
for (i = 0; i < pdev->dpc_rp_log_size - 5; i++) {
pci_read_config_dword(pdev,
cap + PCI_EXP_DPC_RP_PIO_TLPPREFIX_LOG, &prefix);
pci_err(pdev, "TLP Prefix Header: dw%d, %#010x\n", i, prefix);
@ -224,12 +193,10 @@ static int dpc_get_aer_uncorrect_severity(struct pci_dev *dev,
return 1;
}
static irqreturn_t dpc_handler(int irq, void *context)
void dpc_process_error(struct pci_dev *pdev)
{
u16 cap = pdev->dpc_cap, status, source, reason, ext_reason;
struct aer_err_info info;
struct dpc_dev *dpc = context;
struct pci_dev *pdev = dpc->dev->port;
u16 cap = dpc->cap_pos, status, source, reason, ext_reason;
pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status);
pci_read_config_word(pdev, cap + PCI_EXP_DPC_SOURCE_ID, &source);
@ -248,27 +215,33 @@ static irqreturn_t dpc_handler(int irq, void *context)
"reserved error");
/* show RP PIO error detail information */
if (dpc->rp_extensions && reason == 3 && ext_reason == 0)
dpc_process_rp_pio_error(dpc);
if (pdev->dpc_rp_extensions && reason == 3 && ext_reason == 0)
dpc_process_rp_pio_error(pdev);
else if (reason == 0 &&
dpc_get_aer_uncorrect_severity(pdev, &info) &&
aer_get_device_error_info(pdev, &info)) {
aer_print_error(pdev, &info);
pci_cleanup_aer_uncorrect_error_status(pdev);
pci_aer_clear_nonfatal_status(pdev);
pci_aer_clear_fatal_status(pdev);
}
}
static irqreturn_t dpc_handler(int irq, void *context)
{
struct pci_dev *pdev = context;
dpc_process_error(pdev);
/* We configure DPC so it only triggers on ERR_FATAL */
pcie_do_recovery(pdev, pci_channel_io_frozen, PCIE_PORT_SERVICE_DPC);
pcie_do_recovery(pdev, pci_channel_io_frozen, dpc_reset_link);
return IRQ_HANDLED;
}
static irqreturn_t dpc_irq(int irq, void *context)
{
struct dpc_dev *dpc = (struct dpc_dev *)context;
struct pci_dev *pdev = dpc->dev->port;
u16 cap = dpc->cap_pos, status;
struct pci_dev *pdev = context;
u16 cap = pdev->dpc_cap, status;
pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status);
@ -282,10 +255,30 @@ static irqreturn_t dpc_irq(int irq, void *context)
return IRQ_HANDLED;
}
void pci_dpc_init(struct pci_dev *pdev)
{
u16 cap;
pdev->dpc_cap = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DPC);
if (!pdev->dpc_cap)
return;
pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CAP, &cap);
if (!(cap & PCI_EXP_DPC_CAP_RP_EXT))
return;
pdev->dpc_rp_extensions = true;
pdev->dpc_rp_log_size = (cap & PCI_EXP_DPC_RP_PIO_LOG_SIZE) >> 8;
if (pdev->dpc_rp_log_size < 4 || pdev->dpc_rp_log_size > 9) {
pci_err(pdev, "RP PIO log size %u is invalid\n",
pdev->dpc_rp_log_size);
pdev->dpc_rp_log_size = 0;
}
}
#define FLAG(x, y) (((x) & (y)) ? '+' : '-')
static int dpc_probe(struct pcie_device *dev)
{
struct dpc_dev *dpc;
struct pci_dev *pdev = dev->port;
struct device *device = &dev->device;
int status;
@ -294,43 +287,25 @@ static int dpc_probe(struct pcie_device *dev)
if (pcie_aer_get_firmware_first(pdev) && !pcie_ports_dpc_native)
return -ENOTSUPP;
dpc = devm_kzalloc(device, sizeof(*dpc), GFP_KERNEL);
if (!dpc)
return -ENOMEM;
dpc->cap_pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DPC);
dpc->dev = dev;
set_service_data(dev, dpc);
status = devm_request_threaded_irq(device, dev->irq, dpc_irq,
dpc_handler, IRQF_SHARED,
"pcie-dpc", dpc);
"pcie-dpc", pdev);
if (status) {
pci_warn(pdev, "request IRQ%d failed: %d\n", dev->irq,
status);
return status;
}
pci_read_config_word(pdev, dpc->cap_pos + PCI_EXP_DPC_CAP, &cap);
pci_read_config_word(pdev, dpc->cap_pos + PCI_EXP_DPC_CTL, &ctl);
dpc->rp_extensions = (cap & PCI_EXP_DPC_CAP_RP_EXT);
if (dpc->rp_extensions) {
dpc->rp_log_size = (cap & PCI_EXP_DPC_RP_PIO_LOG_SIZE) >> 8;
if (dpc->rp_log_size < 4 || dpc->rp_log_size > 9) {
pci_err(pdev, "RP PIO log size %u is invalid\n",
dpc->rp_log_size);
dpc->rp_log_size = 0;
}
}
pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CAP, &cap);
pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl);
ctl = (ctl & 0xfff4) | PCI_EXP_DPC_CTL_EN_FATAL | PCI_EXP_DPC_CTL_INT_EN;
pci_write_config_word(pdev, dpc->cap_pos + PCI_EXP_DPC_CTL, ctl);
pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl);
pci_info(pdev, "error containment capabilities: Int Msg #%d, RPExt%c PoisonedTLP%c SwTrigger%c RP PIO Log %d, DL_ActiveErr%c\n",
cap & PCI_EXP_DPC_IRQ, FLAG(cap, PCI_EXP_DPC_CAP_RP_EXT),
FLAG(cap, PCI_EXP_DPC_CAP_POISONED_TLP),
FLAG(cap, PCI_EXP_DPC_CAP_SW_TRIGGER), dpc->rp_log_size,
FLAG(cap, PCI_EXP_DPC_CAP_SW_TRIGGER), pdev->dpc_rp_log_size,
FLAG(cap, PCI_EXP_DPC_CAP_DL_ACTIVE));
pci_add_ext_cap_save_buffer(pdev, PCI_EXT_CAP_ID_DPC, sizeof(u16));
@ -339,13 +314,12 @@ static int dpc_probe(struct pcie_device *dev)
static void dpc_remove(struct pcie_device *dev)
{
struct dpc_dev *dpc = get_service_data(dev);
struct pci_dev *pdev = dev->port;
u16 ctl;
pci_read_config_word(pdev, dpc->cap_pos + PCI_EXP_DPC_CTL, &ctl);
pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl);
ctl &= ~(PCI_EXP_DPC_CTL_EN_FATAL | PCI_EXP_DPC_CTL_INT_EN);
pci_write_config_word(pdev, dpc->cap_pos + PCI_EXP_DPC_CTL, ctl);
pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl);
}
static struct pcie_port_service_driver dpcdriver = {
@ -354,7 +328,6 @@ static struct pcie_port_service_driver dpcdriver = {
.service = PCIE_PORT_SERVICE_DPC,
.probe = dpc_probe,
.remove = dpc_remove,
.reset_link = dpc_reset_link,
};
int __init pcie_dpc_init(void)

239
drivers/pci/pcie/edr.c Normal file
View File

@ -0,0 +1,239 @@
// SPDX-License-Identifier: GPL-2.0
/*
* PCI Error Disconnect Recover support
* Author: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
*
* Copyright (C) 2020 Intel Corp.
*/
#define dev_fmt(fmt) "EDR: " fmt
#include <linux/pci.h>
#include <linux/pci-acpi.h>
#include "portdrv.h"
#include "../pci.h"
#define EDR_PORT_DPC_ENABLE_DSM 0x0C
#define EDR_PORT_LOCATE_DSM 0x0D
#define EDR_OST_SUCCESS 0x80
#define EDR_OST_FAILED 0x81
/*
* _DSM wrapper function to enable/disable DPC
* @pdev : PCI device structure
*
* returns 0 on success or errno on failure.
*/
static int acpi_enable_dpc(struct pci_dev *pdev)
{
struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
union acpi_object *obj, argv4, req;
int status = 0;
/*
* Behavior when calling unsupported _DSM functions is undefined,
* so check whether EDR_PORT_DPC_ENABLE_DSM is supported.
*/
if (!acpi_check_dsm(adev->handle, &pci_acpi_dsm_guid, 5,
1ULL << EDR_PORT_DPC_ENABLE_DSM))
return 0;
req.type = ACPI_TYPE_INTEGER;
req.integer.value = 1;
argv4.type = ACPI_TYPE_PACKAGE;
argv4.package.count = 1;
argv4.package.elements = &req;
/*
* Per Downstream Port Containment Related Enhancements ECN to PCI
* Firmware Specification r3.2, sec 4.6.12, EDR_PORT_DPC_ENABLE_DSM is
* optional. Return success if it's not implemented.
*/
obj = acpi_evaluate_dsm(adev->handle, &pci_acpi_dsm_guid, 5,
EDR_PORT_DPC_ENABLE_DSM, &argv4);
if (!obj)
return 0;
if (obj->type != ACPI_TYPE_INTEGER) {
pci_err(pdev, FW_BUG "Enable DPC _DSM returned non integer\n");
status = -EIO;
}
if (obj->integer.value != 1) {
pci_err(pdev, "Enable DPC _DSM failed to enable DPC\n");
status = -EIO;
}
ACPI_FREE(obj);
return status;
}
/*
* _DSM wrapper function to locate DPC port
* @pdev : Device which received EDR event
*
* Returns pci_dev or NULL. Caller is responsible for dropping a reference
* on the returned pci_dev with pci_dev_put().
*/
static struct pci_dev *acpi_dpc_port_get(struct pci_dev *pdev)
{
struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
union acpi_object *obj;
u16 port;
/*
* Behavior when calling unsupported _DSM functions is undefined,
* so check whether EDR_PORT_DPC_ENABLE_DSM is supported.
*/
if (!acpi_check_dsm(adev->handle, &pci_acpi_dsm_guid, 5,
1ULL << EDR_PORT_LOCATE_DSM))
return pci_dev_get(pdev);
obj = acpi_evaluate_dsm(adev->handle, &pci_acpi_dsm_guid, 5,
EDR_PORT_LOCATE_DSM, NULL);
if (!obj)
return pci_dev_get(pdev);
if (obj->type != ACPI_TYPE_INTEGER) {
ACPI_FREE(obj);
pci_err(pdev, FW_BUG "Locate Port _DSM returned non integer\n");
return NULL;
}
/*
* Firmware returns DPC port BDF details in following format:
* 15:8 = bus
* 7:3 = device
* 2:0 = function
*/
port = obj->integer.value;
ACPI_FREE(obj);
return pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus),
PCI_BUS_NUM(port), port & 0xff);
}
/*
* _OST wrapper function to let firmware know the status of EDR event
* @pdev : Device used to send _OST
* @edev : Device which experienced EDR event
* @status : Status of EDR event
*/
static int acpi_send_edr_status(struct pci_dev *pdev, struct pci_dev *edev,
u16 status)
{
struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
u32 ost_status;
pci_dbg(pdev, "Status for %s: %#x\n", pci_name(edev), status);
ost_status = PCI_DEVID(edev->bus->number, edev->devfn) << 16;
ost_status |= status;
status = acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_DISCONNECT_RECOVER,
ost_status, NULL);
if (ACPI_FAILURE(status))
return -EINVAL;
return 0;
}
static void edr_handle_event(acpi_handle handle, u32 event, void *data)
{
struct pci_dev *pdev = data, *edev;
pci_ers_result_t estate = PCI_ERS_RESULT_DISCONNECT;
u16 status;
pci_info(pdev, "ACPI event %#x received\n", event);
if (event != ACPI_NOTIFY_DISCONNECT_RECOVER)
return;
/* Locate the port which issued EDR event */
edev = acpi_dpc_port_get(pdev);
if (!edev) {
pci_err(pdev, "Firmware failed to locate DPC port\n");
return;
}
pci_dbg(pdev, "Reported EDR dev: %s\n", pci_name(edev));
/* If port does not support DPC, just send the OST */
if (!edev->dpc_cap) {
pci_err(edev, FW_BUG "This device doesn't support DPC\n");
goto send_ost;
}
/* Check if there is a valid DPC trigger */
pci_read_config_word(edev, edev->dpc_cap + PCI_EXP_DPC_STATUS, &status);
if (!(status & PCI_EXP_DPC_STATUS_TRIGGER)) {
pci_err(edev, "Invalid DPC trigger %#010x\n", status);
goto send_ost;
}
dpc_process_error(edev);
pci_aer_raw_clear_status(edev);
/*
* Irrespective of whether the DPC event is triggered by ERR_FATAL
* or ERR_NONFATAL, since the link is already down, use the FATAL
* error recovery path for both cases.
*/
estate = pcie_do_recovery(edev, pci_channel_io_frozen, dpc_reset_link);
send_ost:
/*
* If recovery is successful, send _OST(0xF, BDF << 16 | 0x80)
* to firmware. If not successful, send _OST(0xF, BDF << 16 | 0x81).
*/
if (estate == PCI_ERS_RESULT_RECOVERED) {
pci_dbg(edev, "DPC port successfully recovered\n");
acpi_send_edr_status(pdev, edev, EDR_OST_SUCCESS);
} else {
pci_dbg(edev, "DPC port recovery failed\n");
acpi_send_edr_status(pdev, edev, EDR_OST_FAILED);
}
pci_dev_put(edev);
}
void pci_acpi_add_edr_notifier(struct pci_dev *pdev)
{
struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
acpi_status status;
if (!adev) {
pci_dbg(pdev, "No valid ACPI node, skipping EDR init\n");
return;
}
status = acpi_install_notify_handler(adev->handle, ACPI_SYSTEM_NOTIFY,
edr_handle_event, pdev);
if (ACPI_FAILURE(status)) {
pci_err(pdev, "Failed to install notify handler\n");
return;
}
if (acpi_enable_dpc(pdev))
acpi_remove_notify_handler(adev->handle, ACPI_SYSTEM_NOTIFY,
edr_handle_event);
else
pci_dbg(pdev, "Notify handler installed\n");
}
void pci_acpi_remove_edr_notifier(struct pci_dev *pdev)
{
struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
if (!adev)
return;
acpi_remove_notify_handler(adev->handle, ACPI_SYSTEM_NOTIFY,
edr_handle_event);
pci_dbg(pdev, "Notify handler removed\n");
}

66
drivers/pci/pcie/err.c
View File

@ -146,49 +146,9 @@ out:
return 0;
}
/**
* default_reset_link - default reset function
* @dev: pointer to pci_dev data structure
*
* Invoked when performing link reset on a Downstream Port or a
* Root Port with no aer driver.
*/
static pci_ers_result_t default_reset_link(struct pci_dev *dev)
{
int rc;
rc = pci_bus_error_reset(dev);
pci_printk(KERN_DEBUG, dev, "downstream link has been reset\n");
return rc ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED;
}
static pci_ers_result_t reset_link(struct pci_dev *dev, u32 service)
{
pci_ers_result_t status;
struct pcie_port_service_driver *driver = NULL;
driver = pcie_port_find_service(dev, service);
if (driver && driver->reset_link) {
status = driver->reset_link(dev);
} else if (pcie_downstream_port(dev)) {
status = default_reset_link(dev);
} else {
pci_printk(KERN_DEBUG, dev, "no link-reset support at upstream device %s\n",
pci_name(dev));
return PCI_ERS_RESULT_DISCONNECT;
}
if (status != PCI_ERS_RESULT_RECOVERED) {
pci_printk(KERN_DEBUG, dev, "link reset at upstream device %s failed\n",
pci_name(dev));
return PCI_ERS_RESULT_DISCONNECT;
}
return status;
}
void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state,
u32 service)
pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
enum pci_channel_state state,
pci_ers_result_t (*reset_link)(struct pci_dev *pdev))
{
pci_ers_result_t status = PCI_ERS_RESULT_CAN_RECOVER;
struct pci_bus *bus;
@ -203,14 +163,16 @@ void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state,
bus = dev->subordinate;
pci_dbg(dev, "broadcast error_detected message\n");
if (state == pci_channel_io_frozen)
if (state == pci_channel_io_frozen) {
pci_walk_bus(bus, report_frozen_detected, &status);
else
status = reset_link(dev);
if (status != PCI_ERS_RESULT_RECOVERED) {
pci_warn(dev, "link reset failed\n");
goto failed;
}
} else {
pci_walk_bus(bus, report_normal_detected, &status);
if (state == pci_channel_io_frozen &&
reset_link(dev, service) != PCI_ERS_RESULT_RECOVERED)
goto failed;
}
if (status == PCI_ERS_RESULT_CAN_RECOVER) {
status = PCI_ERS_RESULT_RECOVERED;
@ -236,13 +198,15 @@ void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state,
pci_walk_bus(bus, report_resume, &status);
pci_aer_clear_device_status(dev);
pci_cleanup_aer_uncorrect_error_status(dev);
pci_aer_clear_nonfatal_status(dev);
pci_info(dev, "device recovery successful\n");
return;
return status;
failed:
pci_uevent_ers(dev, PCI_ERS_RESULT_DISCONNECT);
/* TODO: Should kernel panic here? */
pci_info(dev, "device recovery failed\n");
return status;
}

5
drivers/pci/pcie/portdrv.h
View File

@ -92,9 +92,6 @@ struct pcie_port_service_driver {
/* Device driver may resume normal operations */
void (*error_resume)(struct pci_dev *dev);
/* Link Reset Capability - AER service driver specific */
pci_ers_result_t (*reset_link)(struct pci_dev *dev);
int port_type; /* Type of the port this driver can handle */
u32 service; /* Port service this device represents */
@ -161,7 +158,5 @@ static inline int pcie_aer_get_firmware_first(struct pci_dev *pci_dev)
}
#endif
struct pcie_port_service_driver *pcie_port_find_service(struct pci_dev *dev,
u32 service);
struct device *pcie_port_find_device(struct pci_dev *dev, u32 service);
#endif /* _PORTDRV_H_ */

21
drivers/pci/pcie/portdrv_core.c
View File

@ -458,27 +458,6 @@ static int find_service_iter(struct device *device, void *data)
return 0;
}
/**
* pcie_port_find_service - find the service driver
* @dev: PCI Express port the service is associated with
* @service: Service to find
*
* Find PCI Express port service driver associated with given service
*/
struct pcie_port_service_driver *pcie_port_find_service(struct pci_dev *dev,
u32 service)
{
struct pcie_port_service_driver *drv;
struct portdrv_service_data pdrvs;
pdrvs.drv = NULL;
pdrvs.service = service;
device_for_each_child(&dev->dev, &pdrvs, find_service_iter);
drv = pdrvs.drv;
return drv;
}
/**
* pcie_port_find_device - find the struct device
* @dev: PCI Express port the service is associated with

42
drivers/pci/probe.c
View File

@ -598,6 +598,7 @@ static void pci_init_host_bridge(struct pci_host_bridge *bridge)
bridge->native_shpc_hotplug = 1;
bridge->native_pme = 1;
bridge->native_ltr = 1;
bridge->native_dpc = 1;
}
struct pci_host_bridge *pci_alloc_host_bridge(size_t priv)
@ -640,6 +641,7 @@ void pci_free_host_bridge(struct pci_host_bridge *bridge)
}
EXPORT_SYMBOL(pci_free_host_bridge);
/* Indexed by PCI_X_SSTATUS_FREQ (secondary bus mode and frequency) */
static const unsigned char pcix_bus_speed[] = {
PCI_SPEED_UNKNOWN, /* 0 */
PCI_SPEED_66MHz_PCIX, /* 1 */
@ -659,6 +661,7 @@ static const unsigned char pcix_bus_speed[] = {
PCI_SPEED_133MHz_PCIX_533 /* F */
};
/* Indexed by PCI_EXP_LNKCAP_SLS, PCI_EXP_LNKSTA_CLS */
const unsigned char pcie_link_speed[] = {
PCI_SPEED_UNKNOWN, /* 0 */
PCIE_SPEED_2_5GT, /* 1 */
@ -677,6 +680,44 @@ const unsigned char pcie_link_speed[] = {
PCI_SPEED_UNKNOWN, /* E */
PCI_SPEED_UNKNOWN /* F */
};
EXPORT_SYMBOL_GPL(pcie_link_speed);
const char *pci_speed_string(enum pci_bus_speed speed)
{
/* Indexed by the pci_bus_speed enum */
static const char *speed_strings[] = {
"33 MHz PCI", /* 0x00 */
"66 MHz PCI", /* 0x01 */
"66 MHz PCI-X", /* 0x02 */
"100 MHz PCI-X", /* 0x03 */
"133 MHz PCI-X", /* 0x04 */
NULL, /* 0x05 */
NULL, /* 0x06 */
NULL, /* 0x07 */
NULL, /* 0x08 */
"66 MHz PCI-X 266", /* 0x09 */
"100 MHz PCI-X 266", /* 0x0a */
"133 MHz PCI-X 266", /* 0x0b */
"Unknown AGP", /* 0x0c */
"1x AGP", /* 0x0d */
"2x AGP", /* 0x0e */
"4x AGP", /* 0x0f */
"8x AGP", /* 0x10 */
"66 MHz PCI-X 533", /* 0x11 */
"100 MHz PCI-X 533", /* 0x12 */
"133 MHz PCI-X 533", /* 0x13 */
"2.5 GT/s PCIe", /* 0x14 */
"5.0 GT/s PCIe", /* 0x15 */
"8.0 GT/s PCIe", /* 0x16 */
"16.0 GT/s PCIe", /* 0x17 */
"32.0 GT/s PCIe", /* 0x18 */
};
if (speed < ARRAY_SIZE(speed_strings))
return speed_strings[speed];
return "Unknown";
}
EXPORT_SYMBOL_GPL(pci_speed_string);
void pcie_update_link_speed(struct pci_bus *bus, u16 linksta)
{
@ -2329,6 +2370,7 @@ static void pci_init_capabilities(struct pci_dev *dev)
pci_enable_acs(dev); /* Enable ACS P2P upstream forwarding */
pci_ptm_init(dev); /* Precision Time Measurement */
pci_aer_init(dev); /* Advanced Error Reporting */
pci_dpc_init(dev); /* Downstream Port Containment */
pcie_report_downtraining(dev);

120
drivers/pci/quirks.c
View File

@ -1970,26 +1970,92 @@ DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80332_1, quirk
/*
* IO-APIC1 on 6300ESB generates boot interrupts, see Intel order no
* 300641-004US, section 5.7.3.
*
* Core IO on Xeon E5 1600/2600/4600, see Intel order no 326509-003.
* Core IO on Xeon E5 v2, see Intel order no 329188-003.
* Core IO on Xeon E7 v2, see Intel order no 329595-002.
* Core IO on Xeon E5 v3, see Intel order no 330784-003.
* Core IO on Xeon E7 v3, see Intel order no 332315-001US.
* Core IO on Xeon E5 v4, see Intel order no 333810-002US.
* Core IO on Xeon E7 v4, see Intel order no 332315-001US.
* Core IO on Xeon D-1500, see Intel order no 332051-001.
* Core IO on Xeon Scalable, see Intel order no 610950.
*/
#define INTEL_6300_IOAPIC_ABAR 0x40
#define INTEL_6300_IOAPIC_ABAR 0x40 /* Bus 0, Dev 29, Func 5 */
#define INTEL_6300_DISABLE_BOOT_IRQ (1<<14)
#define INTEL_CIPINTRC_CFG_OFFSET 0x14C /* Bus 0, Dev 5, Func 0 */
#define INTEL_CIPINTRC_DIS_INTX_ICH (1<<25)
static void quirk_disable_intel_boot_interrupt(struct pci_dev *dev)
{
u16 pci_config_word;
u32 pci_config_dword;
if (noioapicquirk)
return;
pci_read_config_word(dev, INTEL_6300_IOAPIC_ABAR, &pci_config_word);
pci_config_word |= INTEL_6300_DISABLE_BOOT_IRQ;
pci_write_config_word(dev, INTEL_6300_IOAPIC_ABAR, pci_config_word);
switch (dev->device) {
case PCI_DEVICE_ID_INTEL_ESB_10:
pci_read_config_word(dev, INTEL_6300_IOAPIC_ABAR,
&pci_config_word);
pci_config_word |= INTEL_6300_DISABLE_BOOT_IRQ;
pci_write_config_word(dev, INTEL_6300_IOAPIC_ABAR,
pci_config_word);
break;
case 0x3c28: /* Xeon E5 1600/2600/4600 */
case 0x0e28: /* Xeon E5/E7 V2 */
case 0x2f28: /* Xeon E5/E7 V3,V4 */
case 0x6f28: /* Xeon D-1500 */
case 0x2034: /* Xeon Scalable Family */
pci_read_config_dword(dev, INTEL_CIPINTRC_CFG_OFFSET,
&pci_config_dword);
pci_config_dword |= INTEL_CIPINTRC_DIS_INTX_ICH;
pci_write_config_dword(dev, INTEL_CIPINTRC_CFG_OFFSET,
pci_config_dword);
break;
default:
return;
}
pci_info(dev, "disabled boot interrupts on device [%04x:%04x]\n",
dev->vendor, dev->device);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_10, quirk_disable_intel_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_10, quirk_disable_intel_boot_interrupt);
/*
* Device 29 Func 5 Device IDs of IO-APIC
* containing ABAR—APIC1 Alternate Base Address Register
*/
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_10,
quirk_disable_intel_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_10,
quirk_disable_intel_boot_interrupt);
/*
* Device 5 Func 0 Device IDs of Core IO modules/hubs
* containing Coherent Interface Protocol Interrupt Control
*
* Device IDs obtained from volume 2 datasheets of commented
* families above.
*/
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x3c28,
quirk_disable_intel_boot_interrupt);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0e28,
quirk_disable_intel_boot_interrupt);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2f28,
quirk_disable_intel_boot_interrupt);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x6f28,
quirk_disable_intel_boot_interrupt);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2034,
quirk_disable_intel_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x3c28,
quirk_disable_intel_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x0e28,
quirk_disable_intel_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x2f28,
quirk_disable_intel_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x6f28,
quirk_disable_intel_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x2034,
quirk_disable_intel_boot_interrupt);
/* Disable boot interrupts on HT-1000 */
#define BC_HT1000_FEATURE_REG 0x64
@ -4399,6 +4465,29 @@ static int pci_quirk_xgene_acs(struct pci_dev *dev, u16 acs_flags)
PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
}
/*
* Many Zhaoxin Root Ports and Switch Downstream Ports have no ACS capability.
* But the implementation could block peer-to-peer transactions between them
* and provide ACS-like functionality.
*/
static int pci_quirk_zhaoxin_pcie_ports_acs(struct pci_dev *dev, u16 acs_flags)
{
if (!pci_is_pcie(dev) ||
((pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT) &&
(pci_pcie_type(dev) != PCI_EXP_TYPE_DOWNSTREAM)))
return -ENOTTY;
switch (dev->device) {
case 0x0710 ... 0x071e:
case 0x0721:
case 0x0723 ... 0x0732:
return pci_acs_ctrl_enabled(acs_flags,
PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
}
return false;
}
/*
* Many Intel PCH Root Ports do provide ACS-like features to disable peer
* transactions and validate bus numbers in requests, but do not provide an
@ -4701,6 +4790,12 @@ static const struct pci_dev_acs_enabled {
{ PCI_VENDOR_ID_BROADCOM, 0xD714, pci_quirk_brcm_acs },
/* Amazon Annapurna Labs */
{ PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031, pci_quirk_al_acs },
/* Zhaoxin multi-function devices */
{ PCI_VENDOR_ID_ZHAOXIN, 0x3038, pci_quirk_mf_endpoint_acs },
{ PCI_VENDOR_ID_ZHAOXIN, 0x3104, pci_quirk_mf_endpoint_acs },
{ PCI_VENDOR_ID_ZHAOXIN, 0x9083, pci_quirk_mf_endpoint_acs },
/* Zhaoxin Root/Downstream Ports */
{ PCI_VENDOR_ID_ZHAOXIN, PCI_ANY_ID, pci_quirk_zhaoxin_pcie_ports_acs },
{ 0 }
};
@ -5461,3 +5556,14 @@ out_disable:
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, 0x13b1,
PCI_CLASS_DISPLAY_VGA, 8,
quirk_reset_lenovo_thinkpad_p50_nvgpu);
/*
* Device [1b21:2142]
* When in D0, PME# doesn't get asserted when plugging USB 3.0 device.
*/
static void pci_fixup_no_d0_pme(struct pci_dev *dev)
{
pci_info(dev, "PME# does not work under D0, disabling it\n");
dev->pme_support &= ~(PCI_PM_CAP_PME_D0 >> PCI_PM_CAP_PME_SHIFT);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ASMEDIA, 0x2142, pci_fixup_no_d0_pme);

17
drivers/pci/rom.c
View File

@ -195,20 +195,3 @@ void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom)
pci_disable_rom(pdev);
}
EXPORT_SYMBOL(pci_unmap_rom);
/**
* pci_platform_rom - provides a pointer to any ROM image provided by the
* platform
* @pdev: pointer to pci device struct
* @size: pointer to receive size of pci window over ROM
*/
void __iomem *pci_platform_rom(struct pci_dev *pdev, size_t *size)
{
if (pdev->rom && pdev->romlen) {
*size = pdev->romlen;
return phys_to_virt((phys_addr_t)pdev->rom);
}
return NULL;
}
EXPORT_SYMBOL(pci_platform_rom);

34
drivers/pci/setup-bus.c
View File

@ -846,7 +846,7 @@ static resource_size_t window_alignment(struct pci_bus *bus, unsigned long type)
* Per spec, I/O windows are 4K-aligned, but some bridges have
* an extension to support 1K alignment.
*/
if (bus->self->io_window_1k)
if (bus->self && bus->self->io_window_1k)
align = PCI_P2P_DEFAULT_IO_ALIGN_1K;
else
align = PCI_P2P_DEFAULT_IO_ALIGN;
@ -920,7 +920,7 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
calculate_iosize(size, min_size, size1, add_size, children_add_size,
resource_size(b_res), min_align);
if (!size0 && !size1) {
if (b_res->start || b_res->end)
if (bus->self && (b_res->start || b_res->end))
pci_info(bus->self, "disabling bridge window %pR to %pR (unused)\n",
b_res, &bus->busn_res);
b_res->flags = 0;
@ -930,7 +930,7 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
b_res->start = min_align;
b_res->end = b_res->start + size0 - 1;
b_res->flags |= IORESOURCE_STARTALIGN;
if (size1 > size0 && realloc_head) {
if (bus->self && size1 > size0 && realloc_head) {
add_to_list(realloc_head, bus->self, b_res, size1-size0,
min_align);
pci_info(bus->self, "bridge window %pR to %pR add_size %llx\n",
@ -1073,7 +1073,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
calculate_memsize(size, min_size, add_size, children_add_size,
resource_size(b_res), add_align);
if (!size0 && !size1) {
if (b_res->start || b_res->end)
if (bus->self && (b_res->start || b_res->end))
pci_info(bus->self, "disabling bridge window %pR to %pR (unused)\n",
b_res, &bus->busn_res);
b_res->flags = 0;
@ -1082,7 +1082,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
b_res->start = min_align;
b_res->end = size0 + min_align - 1;
b_res->flags |= IORESOURCE_STARTALIGN;
if (size1 > size0 && realloc_head) {
if (bus->self && size1 > size0 && realloc_head) {
add_to_list(realloc_head, bus->self, b_res, size1-size0, add_align);
pci_info(bus->self, "bridge window %pR to %pR add_size %llx add_align %llx\n",
b_res, &bus->busn_res,
@ -1196,8 +1196,9 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
unsigned long mask, prefmask, type2 = 0, type3 = 0;
resource_size_t additional_io_size = 0, additional_mmio_size = 0,
additional_mmio_pref_size = 0;
struct resource *b_res;
int ret;
struct resource *pref;
struct pci_host_bridge *host;
int hdr_type, i, ret;
list_for_each_entry(dev, &bus->devices, bus_list) {
struct pci_bus *b = dev->subordinate;
@ -1217,10 +1218,20 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
}
/* The root bus? */
if (pci_is_root_bus(bus))
return;
if (pci_is_root_bus(bus)) {
host = to_pci_host_bridge(bus->bridge);
if (!host->size_windows)
return;
pci_bus_for_each_resource(bus, pref, i)
if (pref && (pref->flags & IORESOURCE_PREFETCH))
break;
hdr_type = -1; /* Intentionally invalid - not a PCI device. */
} else {
pref = &bus->self->resource[PCI_BRIDGE_RESOURCES + 2];
hdr_type = bus->self->hdr_type;
}
switch (bus->self->hdr_type) {
switch (hdr_type) {
case PCI_HEADER_TYPE_CARDBUS:
/* Don't size CardBuses yet */
break;
@ -1242,10 +1253,9 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
* the size required to put all 64-bit prefetchable
* resources in it.
*/
b_res = &bus->self->resource[PCI_BRIDGE_RESOURCES];
mask = IORESOURCE_MEM;
prefmask = IORESOURCE_MEM | IORESOURCE_PREFETCH;
if (b_res[2].flags & IORESOURCE_MEM_64) {
if (pref && (pref->flags & IORESOURCE_MEM_64)) {
prefmask |= IORESOURCE_MEM_64;
ret = pbus_size_mem(bus, prefmask, prefmask,
prefmask, prefmask,

38
drivers/pci/slot.c
View File

@ -49,45 +49,9 @@ static ssize_t address_read_file(struct pci_slot *slot, char *buf)
slot->number);
}
/* these strings match up with the values in pci_bus_speed */
static const char *pci_bus_speed_strings[] = {
"33 MHz PCI", /* 0x00 */
"66 MHz PCI", /* 0x01 */
"66 MHz PCI-X", /* 0x02 */
"100 MHz PCI-X", /* 0x03 */
"133 MHz PCI-X", /* 0x04 */
NULL, /* 0x05 */
NULL, /* 0x06 */
NULL, /* 0x07 */
NULL, /* 0x08 */
"66 MHz PCI-X 266", /* 0x09 */
"100 MHz PCI-X 266", /* 0x0a */
"133 MHz PCI-X 266", /* 0x0b */
"Unknown AGP", /* 0x0c */
"1x AGP", /* 0x0d */
"2x AGP", /* 0x0e */
"4x AGP", /* 0x0f */
"8x AGP", /* 0x10 */
"66 MHz PCI-X 533", /* 0x11 */
"100 MHz PCI-X 533", /* 0x12 */
"133 MHz PCI-X 533", /* 0x13 */
"2.5 GT/s PCIe", /* 0x14 */
"5.0 GT/s PCIe", /* 0x15 */
"8.0 GT/s PCIe", /* 0x16 */
"16.0 GT/s PCIe", /* 0x17 */
"32.0 GT/s PCIe", /* 0x18 */
};
static ssize_t bus_speed_read(enum pci_bus_speed speed, char *buf)
{
const char *speed_string;
if (speed < ARRAY_SIZE(pci_bus_speed_strings))
speed_string = pci_bus_speed_strings[speed];
else
speed_string = "Unknown";
return sprintf(buf, "%s\n", speed_string);
return sprintf(buf, "%s\n", pci_speed_string(speed));
}
static ssize_t max_speed_read_file(struct pci_slot *slot, char *buf)

22
drivers/phy/amlogic/Kconfig
View File

@ -59,3 +59,25 @@ config PHY_MESON_G12A_USB3_PCIE
Enable this to support the Meson USB3 + PCIE Combo PHY found
in Meson G12A SoCs.
If unsure, say N.
config PHY_MESON_AXG_PCIE
tristate "Meson AXG PCIE PHY driver"
default ARCH_MESON
depends on OF && (ARCH_MESON || COMPILE_TEST)
select GENERIC_PHY
select REGMAP_MMIO
help
Enable this to support the Meson MIPI + PCIE PHY found
in Meson AXG SoCs.
If unsure, say N.
config PHY_MESON_AXG_MIPI_PCIE_ANALOG
tristate "Meson AXG MIPI + PCIE analog PHY driver"
default ARCH_MESON
depends on OF && (ARCH_MESON || COMPILE_TEST)
select GENERIC_PHY
select REGMAP_MMIO
help
Enable this to support the Meson MIPI + PCIE analog PHY
found in Meson AXG SoCs.
If unsure, say N.

12
drivers/phy/amlogic/Makefile
View File

@ -1,6 +1,8 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_PHY_MESON8B_USB2) += phy-meson8b-usb2.o
obj-$(CONFIG_PHY_MESON_GXL_USB2) += phy-meson-gxl-usb2.o
obj-$(CONFIG_PHY_MESON_G12A_USB2) += phy-meson-g12a-usb2.o
obj-$(CONFIG_PHY_MESON_GXL_USB3) += phy-meson-gxl-usb3.o
obj-$(CONFIG_PHY_MESON_G12A_USB3_PCIE) += phy-meson-g12a-usb3-pcie.o
obj-$(CONFIG_PHY_MESON8B_USB2) += phy-meson8b-usb2.o
obj-$(CONFIG_PHY_MESON_GXL_USB2) += phy-meson-gxl-usb2.o
obj-$(CONFIG_PHY_MESON_G12A_USB2) += phy-meson-g12a-usb2.o
obj-$(CONFIG_PHY_MESON_GXL_USB3) += phy-meson-gxl-usb3.o
obj-$(CONFIG_PHY_MESON_G12A_USB3_PCIE) += phy-meson-g12a-usb3-pcie.o
obj-$(CONFIG_PHY_MESON_AXG_PCIE) += phy-meson-axg-pcie.o
obj-$(CONFIG_PHY_MESON_AXG_MIPI_PCIE_ANALOG) += phy-meson-axg-mipi-pcie-analog.o

188
drivers/phy/amlogic/phy-meson-axg-mipi-pcie-analog.c Normal file
View File

@ -0,0 +1,188 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Amlogic AXG MIPI + PCIE analog PHY driver
*
* Copyright (C) 2019 Remi Pommarel <repk@triplefau.lt>
*/
#include <linux/module.h>
#include <linux/phy/phy.h>
#include <linux/regmap.h>
#include <linux/platform_device.h>
#include <dt-bindings/phy/phy.h>
#define HHI_MIPI_CNTL0 0x00
#define HHI_MIPI_CNTL0_COMMON_BLOCK GENMASK(31, 28)
#define HHI_MIPI_CNTL0_ENABLE BIT(29)
#define HHI_MIPI_CNTL0_BANDGAP BIT(26)
#define HHI_MIPI_CNTL0_DECODE_TO_RTERM GENMASK(15, 12)
#define HHI_MIPI_CNTL0_OUTPUT_EN BIT(3)
#define HHI_MIPI_CNTL1 0x01
#define HHI_MIPI_CNTL1_CH0_CML_PDR_EN BIT(12)
#define HHI_MIPI_CNTL1_LP_ABILITY GENMASK(5, 4)
#define HHI_MIPI_CNTL1_LP_RESISTER BIT(3)
#define HHI_MIPI_CNTL1_INPUT_SETTING BIT(2)
#define HHI_MIPI_CNTL1_INPUT_SEL BIT(1)
#define HHI_MIPI_CNTL1_PRBS7_EN BIT(0)
#define HHI_MIPI_CNTL2 0x02
#define HHI_MIPI_CNTL2_CH_PU GENMASK(31, 25)
#define HHI_MIPI_CNTL2_CH_CTL GENMASK(24, 19)
#define HHI_MIPI_CNTL2_CH0_DIGDR_EN BIT(18)
#define HHI_MIPI_CNTL2_CH_DIGDR_EN BIT(17)
#define HHI_MIPI_CNTL2_LPULPS_EN BIT(16)
#define HHI_MIPI_CNTL2_CH_EN(n) BIT(15 - (n))
#define HHI_MIPI_CNTL2_CH0_LP_CTL GENMASK(10, 1)
struct phy_axg_mipi_pcie_analog_priv {
struct phy *phy;
unsigned int mode;
struct regmap *regmap;
};
static const struct regmap_config phy_axg_mipi_pcie_analog_regmap_conf = {
.reg_bits = 8,
.val_bits = 32,
.reg_stride = 4,
.max_register = HHI_MIPI_CNTL2,
};
static int phy_axg_mipi_pcie_analog_power_on(struct phy *phy)
{
struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);
/* MIPI not supported yet */
if (priv->mode != PHY_TYPE_PCIE)
return -EINVAL;
regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
HHI_MIPI_CNTL0_BANDGAP, HHI_MIPI_CNTL0_BANDGAP);
regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
HHI_MIPI_CNTL0_ENABLE, HHI_MIPI_CNTL0_ENABLE);
return 0;
}
static int phy_axg_mipi_pcie_analog_power_off(struct phy *phy)
{
struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);
/* MIPI not supported yet */
if (priv->mode != PHY_TYPE_PCIE)
return -EINVAL;
regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
HHI_MIPI_CNTL0_BANDGAP, 0);
regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
HHI_MIPI_CNTL0_ENABLE, 0);
return 0;
}
static int phy_axg_mipi_pcie_analog_init(struct phy *phy)
{
return 0;
}
static int phy_axg_mipi_pcie_analog_exit(struct phy *phy)
{
return 0;
}
static const struct phy_ops phy_axg_mipi_pcie_analog_ops = {
.init = phy_axg_mipi_pcie_analog_init,
.exit = phy_axg_mipi_pcie_analog_exit,
.power_on = phy_axg_mipi_pcie_analog_power_on,
.power_off = phy_axg_mipi_pcie_analog_power_off,
.owner = THIS_MODULE,
};
static struct phy *phy_axg_mipi_pcie_analog_xlate(struct device *dev,
struct of_phandle_args *args)
{
struct phy_axg_mipi_pcie_analog_priv *priv = dev_get_drvdata(dev);
unsigned int mode;
if (args->args_count != 1) {
dev_err(dev, "invalid number of arguments\n");
return ERR_PTR(-EINVAL);
}
mode = args->args[0];
/* MIPI mode is not supported yet */
if (mode != PHY_TYPE_PCIE) {
dev_err(dev, "invalid phy mode select argument\n");
return ERR_PTR(-EINVAL);
}
priv->mode = mode;
return priv->phy;
}
static int phy_axg_mipi_pcie_analog_probe(struct platform_device *pdev)
{
struct phy_provider *phy;
struct device *dev = &pdev->dev;
struct phy_axg_mipi_pcie_analog_priv *priv;
struct device_node *np = dev->of_node;
struct regmap *map;
struct resource *res;
void __iomem *base;
int ret;
priv = devm_kmalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(dev, res);
if (IS_ERR(base)) {
dev_err(dev, "failed to get regmap base\n");
return PTR_ERR(base);
}
map = devm_regmap_init_mmio(dev, base,
&phy_axg_mipi_pcie_analog_regmap_conf);
if (IS_ERR(map)) {
dev_err(dev, "failed to get HHI regmap\n");
return PTR_ERR(map);
}
priv->regmap = map;
priv->phy = devm_phy_create(dev, np, &phy_axg_mipi_pcie_analog_ops);
if (IS_ERR(priv->phy)) {
ret = PTR_ERR(priv->phy);
if (ret != -EPROBE_DEFER)
dev_err(dev, "failed to create PHY\n");
return ret;
}
phy_set_drvdata(priv->phy, priv);
dev_set_drvdata(dev, priv);
phy = devm_of_phy_provider_register(dev,
phy_axg_mipi_pcie_analog_xlate);
return PTR_ERR_OR_ZERO(phy);
}
static const struct of_device_id phy_axg_mipi_pcie_analog_of_match[] = {
{
.compatible = "amlogic,axg-mipi-pcie-analog-phy",
},
{ },
};
MODULE_DEVICE_TABLE(of, phy_axg_mipi_pcie_analog_of_match);
static struct platform_driver phy_axg_mipi_pcie_analog_driver = {
.probe = phy_axg_mipi_pcie_analog_probe,
.driver = {
.name = "phy-axg-mipi-pcie-analog",
.of_match_table = phy_axg_mipi_pcie_analog_of_match,
},
};
module_platform_driver(phy_axg_mipi_pcie_analog_driver);
MODULE_AUTHOR("Remi Pommarel <repk@triplefau.lt>");
MODULE_DESCRIPTION("Amlogic AXG MIPI + PCIE analog PHY driver");
MODULE_LICENSE("GPL v2");

192
drivers/phy/amlogic/phy-meson-axg-pcie.c Normal file
View File

@ -0,0 +1,192 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Amlogic AXG PCIE PHY driver
*
* Copyright (C) 2020 Remi Pommarel <repk@triplefau.lt>
*/
#include <linux/module.h>
#include <linux/phy/phy.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/platform_device.h>
#include <linux/bitfield.h>
#include <dt-bindings/phy/phy.h>
#define MESON_PCIE_REG0 0x00
#define MESON_PCIE_COMMON_CLK BIT(4)
#define MESON_PCIE_PORT_SEL GENMASK(3, 2)
#define MESON_PCIE_CLK BIT(1)
#define MESON_PCIE_POWERDOWN BIT(0)
#define MESON_PCIE_TWO_X1 FIELD_PREP(MESON_PCIE_PORT_SEL, 0x3)
#define MESON_PCIE_COMMON_REF_CLK FIELD_PREP(MESON_PCIE_COMMON_CLK, 0x1)
#define MESON_PCIE_PHY_INIT (MESON_PCIE_TWO_X1 | \
MESON_PCIE_COMMON_REF_CLK)
#define MESON_PCIE_RESET_DELAY 500
struct phy_axg_pcie_priv {
struct phy *phy;
struct phy *analog;
struct regmap *regmap;
struct reset_control *reset;
};
static const struct regmap_config phy_axg_pcie_regmap_conf = {
.reg_bits = 8,
.val_bits = 32,
.reg_stride = 4,
.max_register = MESON_PCIE_REG0,
};
static int phy_axg_pcie_power_on(struct phy *phy)
{
struct phy_axg_pcie_priv *priv = phy_get_drvdata(phy);
int ret;
ret = phy_power_on(priv->analog);
if (ret != 0)
return ret;
regmap_update_bits(priv->regmap, MESON_PCIE_REG0,
MESON_PCIE_POWERDOWN, 0);
return 0;
}
static int phy_axg_pcie_power_off(struct phy *phy)
{
struct phy_axg_pcie_priv *priv = phy_get_drvdata(phy);
int ret;
ret = phy_power_off(priv->analog);
if (ret != 0)
return ret;
regmap_update_bits(priv->regmap, MESON_PCIE_REG0,
MESON_PCIE_POWERDOWN, 1);
return 0;
}
static int phy_axg_pcie_init(struct phy *phy)
{
struct phy_axg_pcie_priv *priv = phy_get_drvdata(phy);
int ret;
ret = phy_init(priv->analog);
if (ret != 0)
return ret;
regmap_write(priv->regmap, MESON_PCIE_REG0, MESON_PCIE_PHY_INIT);
return reset_control_reset(priv->reset);
}
static int phy_axg_pcie_exit(struct phy *phy)
{
struct phy_axg_pcie_priv *priv = phy_get_drvdata(phy);
int ret;
ret = phy_exit(priv->analog);
if (ret != 0)
return ret;
return reset_control_reset(priv->reset);
}
static int phy_axg_pcie_reset(struct phy *phy)
{
struct phy_axg_pcie_priv *priv = phy_get_drvdata(phy);
int ret = 0;
ret = phy_reset(priv->analog);
if (ret != 0)
goto out;
ret = reset_control_assert(priv->reset);
if (ret != 0)
goto out;
udelay(MESON_PCIE_RESET_DELAY);
ret = reset_control_deassert(priv->reset);
if (ret != 0)
goto out;
udelay(MESON_PCIE_RESET_DELAY);
out:
return ret;
}
static const struct phy_ops phy_axg_pcie_ops = {
.init = phy_axg_pcie_init,
.exit = phy_axg_pcie_exit,
.power_on = phy_axg_pcie_power_on,
.power_off = phy_axg_pcie_power_off,
.reset = phy_axg_pcie_reset,
.owner = THIS_MODULE,
};
static int phy_axg_pcie_probe(struct platform_device *pdev)
{
struct phy_provider *pphy;
struct device *dev = &pdev->dev;
struct phy_axg_pcie_priv *priv;
struct device_node *np = dev->of_node;
struct resource *res;
void __iomem *base;
int ret;
priv = devm_kmalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->phy = devm_phy_create(dev, np, &phy_axg_pcie_ops);
if (IS_ERR(priv->phy)) {
ret = PTR_ERR(priv->phy);
if (ret != -EPROBE_DEFER)
dev_err(dev, "failed to create PHY\n");
return ret;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
priv->regmap = devm_regmap_init_mmio(dev, base,
&phy_axg_pcie_regmap_conf);
if (IS_ERR(priv->regmap))
return PTR_ERR(priv->regmap);
priv->reset = devm_reset_control_array_get(dev, false, false);
if (IS_ERR(priv->reset))
return PTR_ERR(priv->reset);
priv->analog = devm_phy_get(dev, "analog");
if (IS_ERR(priv->analog))
return PTR_ERR(priv->analog);
phy_set_drvdata(priv->phy, priv);
dev_set_drvdata(dev, priv);
pphy = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
return PTR_ERR_OR_ZERO(pphy);
}
static const struct of_device_id phy_axg_pcie_of_match[] = {
{
.compatible = "amlogic,axg-pcie-phy",
},
{ },
};
MODULE_DEVICE_TABLE(of, phy_axg_pcie_of_match);
static struct platform_driver phy_axg_pcie_driver = {
.probe = phy_axg_pcie_probe,
.driver = {
.name = "phy-axg-pcie",
.of_match_table = phy_axg_pcie_of_match,
},
};
module_platform_driver(phy_axg_pcie_driver);
MODULE_AUTHOR("Remi Pommarel <repk@triplefau.lt>");
MODULE_DESCRIPTION("Amlogic AXG PCIE PHY driver");
MODULE_LICENSE("GPL v2");

4
drivers/scsi/lpfc/lpfc_attr.c
View File

@ -4780,7 +4780,7 @@ static DEVICE_ATTR_RW(lpfc_aer_support);
* Description:
* If the @buf contains 1 and the device currently has the AER support
* enabled, then invokes the kernel AER helper routine
* pci_cleanup_aer_uncorrect_error_status to clean up the uncorrectable
* pci_aer_clear_nonfatal_status() to clean up the uncorrectable
* error status register.
*
* Notes:
@ -4806,7 +4806,7 @@ lpfc_aer_cleanup_state(struct device *dev, struct device_attribute *attr,
return -EINVAL;
if (phba->hba_flag & HBA_AER_ENABLED)
rc = pci_cleanup_aer_uncorrect_error_status(phba->pcidev);
rc = pci_aer_clear_nonfatal_status(phba->pcidev);
if (rc == 0)
return strlen(buf);

6
include/linux/acpi.h
View File

@ -530,8 +530,9 @@ extern bool osc_pc_lpi_support_confirmed;
#define OSC_PCI_CLOCK_PM_SUPPORT 0x00000004
#define OSC_PCI_SEGMENT_GROUPS_SUPPORT 0x00000008
#define OSC_PCI_MSI_SUPPORT 0x00000010
#define OSC_PCI_EDR_SUPPORT 0x00000080
#define OSC_PCI_HPX_TYPE_3_SUPPORT 0x00000100
#define OSC_PCI_SUPPORT_MASKS 0x0000011f
#define OSC_PCI_SUPPORT_MASKS 0x0000019f
/* PCI Host Bridge _OSC: Capabilities DWORD 3: Control Field */
#define OSC_PCI_EXPRESS_NATIVE_HP_CONTROL 0x00000001
@ -540,7 +541,8 @@ extern bool osc_pc_lpi_support_confirmed;
#define OSC_PCI_EXPRESS_AER_CONTROL 0x00000008
#define OSC_PCI_EXPRESS_CAPABILITY_CONTROL 0x00000010
#define OSC_PCI_EXPRESS_LTR_CONTROL 0x00000020
#define OSC_PCI_CONTROL_MASKS 0x0000003f
#define OSC_PCI_EXPRESS_DPC_CONTROL 0x00000080
#define OSC_PCI_CONTROL_MASKS 0x000000bf
#define ACPI_GSB_ACCESS_ATTRIB_QUICK 0x00000002
#define ACPI_GSB_ACCESS_ATTRIB_SEND_RCV 0x00000004

9
include/linux/aer.h
View File

@ -44,8 +44,7 @@ struct aer_capability_regs {
/* PCIe port driver needs this function to enable AER */
int pci_enable_pcie_error_reporting(struct pci_dev *dev);
int pci_disable_pcie_error_reporting(struct pci_dev *dev);
int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev);
int pci_cleanup_aer_error_status_regs(struct pci_dev *dev);
int pci_aer_clear_nonfatal_status(struct pci_dev *dev);
void pci_save_aer_state(struct pci_dev *dev);
void pci_restore_aer_state(struct pci_dev *dev);
#else
@ -57,11 +56,7 @@ static inline int pci_disable_pcie_error_reporting(struct pci_dev *dev)
{
return -EINVAL;
}
static inline int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
{
return -EINVAL;
}
static inline int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
static inline int pci_aer_clear_nonfatal_status(struct pci_dev *dev)
{
return -EINVAL;
}

8
include/linux/pci-acpi.h
View File

@ -112,6 +112,14 @@ extern const guid_t pci_acpi_dsm_guid;
#define RESET_DELAY_DSM 0x08
#define FUNCTION_DELAY_DSM 0x09
#ifdef CONFIG_PCIE_EDR
void pci_acpi_add_edr_notifier(struct pci_dev *pdev);
void pci_acpi_remove_edr_notifier(struct pci_dev *pdev);
#else
static inline void pci_acpi_add_edr_notifier(struct pci_dev *pdev) { }
static inline void pci_acpi_remove_edr_notifier(struct pci_dev *pdev) { }
#endif /* CONFIG_PCIE_EDR */
#else /* CONFIG_ACPI */
static inline void acpi_pci_add_bus(struct pci_bus *bus) { }
static inline void acpi_pci_remove_bus(struct pci_bus *bus) { }

27
include/linux/pci-epc.h
View File

@ -53,7 +53,8 @@ struct pci_epc_ops {
phys_addr_t addr);
int (*set_msi)(struct pci_epc *epc, u8 func_no, u8 interrupts);
int (*get_msi)(struct pci_epc *epc, u8 func_no);
int (*set_msix)(struct pci_epc *epc, u8 func_no, u16 interrupts);
int (*set_msix)(struct pci_epc *epc, u8 func_no, u16 interrupts,
enum pci_barno, u32 offset);
int (*get_msix)(struct pci_epc *epc, u8 func_no);
int (*raise_irq)(struct pci_epc *epc, u8 func_no,
enum pci_epc_irq_type type, u16 interrupt_num);
@ -71,6 +72,7 @@ struct pci_epc_ops {
* @bitmap: bitmap to manage the PCI address space
* @pages: number of bits representing the address region
* @page_size: size of each page
* @lock: mutex to protect bitmap
*/
struct pci_epc_mem {
phys_addr_t phys_base;
@ -78,6 +80,8 @@ struct pci_epc_mem {
unsigned long *bitmap;
size_t page_size;
int pages;
/* mutex to protect against concurrent access for memory allocation*/
struct mutex lock;
};
/**
@ -88,7 +92,9 @@ struct pci_epc_mem {
* @mem: address space of the endpoint controller
* @max_functions: max number of functions that can be configured in this EPC
* @group: configfs group representing the PCI EPC device
* @lock: spinlock to protect pci_epc ops
* @lock: mutex to protect pci_epc ops
* @function_num_map: bitmap to manage physical function number
* @notifier: used to notify EPF of any EPC events (like linkup)
*/
struct pci_epc {
struct device dev;
@ -97,8 +103,10 @@ struct pci_epc {
struct pci_epc_mem *mem;
u8 max_functions;
struct config_group *group;
/* spinlock to protect against concurrent access of EP controller */
spinlock_t lock;
/* mutex to protect against concurrent access of EP controller */
struct mutex lock;
unsigned long function_num_map;
struct atomic_notifier_head notifier;
};
/**
@ -113,6 +121,7 @@ struct pci_epc {
*/
struct pci_epc_features {
unsigned int linkup_notifier : 1;
unsigned int core_init_notifier : 1;
unsigned int msi_capable : 1;
unsigned int msix_capable : 1;
u8 reserved_bar;
@ -141,6 +150,12 @@ static inline void *epc_get_drvdata(struct pci_epc *epc)
return dev_get_drvdata(&epc->dev);
}
static inline int
pci_epc_register_notifier(struct pci_epc *epc, struct notifier_block *nb)
{
return atomic_notifier_chain_register(&epc->notifier, nb);
}
struct pci_epc *
__devm_pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
struct module *owner);
@ -151,6 +166,7 @@ void devm_pci_epc_destroy(struct device *dev, struct pci_epc *epc);
void pci_epc_destroy(struct pci_epc *epc);
int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf);
void pci_epc_linkup(struct pci_epc *epc);
void pci_epc_init_notify(struct pci_epc *epc);
void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf);
int pci_epc_write_header(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *hdr);
@ -165,7 +181,8 @@ void pci_epc_unmap_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t phys_addr);
int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts);
int pci_epc_get_msi(struct pci_epc *epc, u8 func_no);
int pci_epc_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts);
int pci_epc_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts,
enum pci_barno, u32 offset);
int pci_epc_get_msix(struct pci_epc *epc, u8 func_no);
int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no,
enum pci_epc_irq_type type, u16 interrupt_num);

29
include/linux/pci-epf.h
View File

@ -15,6 +15,11 @@
struct pci_epf;
enum pci_notify_event {
CORE_INIT,
LINK_UP,
};
enum pci_barno {
BAR_0,
BAR_1,
@ -55,13 +60,10 @@ struct pci_epf_header {
* @bind: ops to perform when a EPC device has been bound to EPF device
* @unbind: ops to perform when a binding has been lost between a EPC device
* and EPF device
* @linkup: ops to perform when the EPC device has established a connection with
* a host system
*/
struct pci_epf_ops {
int (*bind)(struct pci_epf *epf);
void (*unbind)(struct pci_epf *epf);
void (*linkup)(struct pci_epf *epf);
};
/**
@ -92,10 +94,12 @@ struct pci_epf_driver {
/**
* struct pci_epf_bar - represents the BAR of EPF device
* @phys_addr: physical address that should be mapped to the BAR
* @addr: virtual address corresponding to the @phys_addr
* @size: the size of the address space present in BAR
*/
struct pci_epf_bar {
dma_addr_t phys_addr;
void *addr;
size_t size;
enum pci_barno barno;
int flags;
@ -112,6 +116,8 @@ struct pci_epf_bar {
* @epc: the EPC device to which this EPF device is bound
* @driver: the EPF driver to which this EPF device is bound
* @list: to add pci_epf as a list of PCI endpoint functions to pci_epc
* @nb: notifier block to notify EPF of any EPC events (like linkup)
* @lock: mutex to protect pci_epf_ops
*/
struct pci_epf {
struct device dev;
@ -125,6 +131,22 @@ struct pci_epf {
struct pci_epc *epc;
struct pci_epf_driver *driver;
struct list_head list;
struct notifier_block nb;
/* mutex to protect against concurrent access of pci_epf_ops */
struct mutex lock;
};
/**
* struct pci_epf_msix_tbl - represents the MSIX table entry structure
* @msg_addr: Writes to this address will trigger MSIX interrupt in host
* @msg_data: Data that should be written to @msg_addr to trigger MSIX interrupt
* @vector_ctrl: Identifies if the function is prohibited from sending a message
* using this MSIX table entry
*/
struct pci_epf_msix_tbl {
u64 msg_addr;
u32 msg_data;
u32 vector_ctrl;
};
#define to_pci_epf(epf_dev) container_of((epf_dev), struct pci_epf, dev)
@ -154,5 +176,4 @@ void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar,
void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar);
int pci_epf_bind(struct pci_epf *epf);
void pci_epf_unbind(struct pci_epf *epf);
void pci_epf_linkup(struct pci_epf *epf);
#endif /* __LINUX_PCI_EPF_H */

10
include/linux/pci.h
View File

@ -243,7 +243,7 @@ enum pcie_link_width {
PCIE_LNK_WIDTH_UNKNOWN = 0xff,
};
/* Based on the PCI Hotplug Spec, but some values are made up by us */
/* See matching string table in pci_speed_string() */
enum pci_bus_speed {
PCI_SPEED_33MHz = 0x00,
PCI_SPEED_66MHz = 0x01,
@ -451,6 +451,11 @@ struct pci_dev {
const struct attribute_group **msi_irq_groups;
#endif
struct pci_vpd *vpd;
#ifdef CONFIG_PCIE_DPC
u16 dpc_cap;
unsigned int dpc_rp_extensions:1;
u8 dpc_rp_log_size;
#endif
#ifdef CONFIG_PCI_ATS
union {
struct pci_sriov *sriov; /* PF: SR-IOV info */
@ -517,7 +522,9 @@ struct pci_host_bridge {
unsigned int native_shpc_hotplug:1; /* OS may use SHPC hotplug */
unsigned int native_pme:1; /* OS may use PCIe PME */
unsigned int native_ltr:1; /* OS may use PCIe LTR */
unsigned int native_dpc:1; /* OS may use PCIe DPC */
unsigned int preserve_config:1; /* Preserve FW resource setup */
unsigned int size_windows:1; /* Enable root bus sizing */
/* Resource alignment requirements */
resource_size_t (*align_resource)(struct pci_dev *dev,
@ -1224,7 +1231,6 @@ int pci_enable_rom(struct pci_dev *pdev);
void pci_disable_rom(struct pci_dev *pdev);
void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
void __iomem __must_check *pci_platform_rom(struct pci_dev *pdev, size_t *size);
/* Power management related routines */
int pci_save_state(struct pci_dev *dev);

2
include/linux/pci_ids.h
View File

@ -2585,6 +2585,8 @@
#define PCI_VENDOR_ID_AMAZON 0x1d0f
#define PCI_VENDOR_ID_ZHAOXIN 0x1d17
#define PCI_VENDOR_ID_HYGON 0x1d94
#define PCI_VENDOR_ID_HXT 0x1dbf

10
include/soc/tegra/bpmp-abi.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2014-2018, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2014-2020, NVIDIA CORPORATION. All rights reserved.
*/
#ifndef _ABI_BPMP_ABI_H_
@ -2119,6 +2119,7 @@ enum {
CMD_UPHY_PCIE_LANE_MARGIN_STATUS = 2,
CMD_UPHY_PCIE_EP_CONTROLLER_PLL_INIT = 3,
CMD_UPHY_PCIE_CONTROLLER_STATE = 4,
CMD_UPHY_PCIE_EP_CONTROLLER_PLL_OFF = 5,
CMD_UPHY_MAX,
};
@ -2151,6 +2152,11 @@ struct cmd_uphy_pcie_controller_state_request {
uint8_t enable;
} __ABI_PACKED;
struct cmd_uphy_ep_controller_pll_off_request {
/** @brief EP controller number, valid: 0, 4, 5 */
uint8_t ep_controller;
} __ABI_PACKED;
/**
* @ingroup UPHY
* @brief Request with #MRQ_UPHY
@ -2165,6 +2171,7 @@ struct cmd_uphy_pcie_controller_state_request {
* |CMD_UPHY_PCIE_LANE_MARGIN_STATUS | |
* |CMD_UPHY_PCIE_EP_CONTROLLER_PLL_INIT |cmd_uphy_ep_controller_pll_init_request |
* |CMD_UPHY_PCIE_CONTROLLER_STATE |cmd_uphy_pcie_controller_state_request |
* |CMD_UPHY_PCIE_EP_CONTROLLER_PLL_OFF |cmd_uphy_ep_controller_pll_off_request |
*
*/
@ -2178,6 +2185,7 @@ struct mrq_uphy_request {
struct cmd_uphy_margin_control_request uphy_set_margin_control;
struct cmd_uphy_ep_controller_pll_init_request ep_ctrlr_pll_init;
struct cmd_uphy_pcie_controller_state_request controller_state;
struct cmd_uphy_ep_controller_pll_off_request ep_ctrlr_pll_off;
} __UNION_ANON;
} __ABI_PACKED;

2
include/uapi/linux/pci_regs.h
View File

@ -605,6 +605,7 @@
#define PCI_EXP_SLTCTL_PWR_OFF 0x0400 /* Power Off */
#define PCI_EXP_SLTCTL_EIC 0x0800 /* Electromechanical Interlock Control */
#define PCI_EXP_SLTCTL_DLLSCE 0x1000 /* Data Link Layer State Changed Enable */
#define PCI_EXP_SLTCTL_IBPD_DISABLE 0x4000 /* In-band PD disable */
#define PCI_EXP_SLTSTA 26 /* Slot Status */
#define PCI_EXP_SLTSTA_ABP 0x0001 /* Attention Button Pressed */
#define PCI_EXP_SLTSTA_PFD 0x0002 /* Power Fault Detected */
@ -680,6 +681,7 @@
#define PCI_EXP_LNKSTA2 50 /* Link Status 2 */
#define PCI_CAP_EXP_ENDPOINT_SIZEOF_V2 52 /* v2 endpoints with link end here */
#define PCI_EXP_SLTCAP2 52 /* Slot Capabilities 2 */
#define PCI_EXP_SLTCAP2_IBPD 0x00000001 /* In-band PD Disable Supported */
#define PCI_EXP_SLTCTL2 56 /* Slot Control 2 */
#define PCI_EXP_SLTSTA2 58 /* Slot Status 2 */

8
include/uapi/linux/pcitest.h
View File

@ -19,5 +19,13 @@
#define PCITEST_MSIX _IOW('P', 0x7, int)
#define PCITEST_SET_IRQTYPE _IOW('P', 0x8, int)
#define PCITEST_GET_IRQTYPE _IO('P', 0x9)
#define PCITEST_CLEAR_IRQ _IO('P', 0x10)
#define PCITEST_FLAGS_USE_DMA 0x00000001
struct pci_endpoint_test_xfer_param {
unsigned long size;
unsigned char flags;
};
#endif /* __UAPI_LINUX_PCITEST_H */

37
tools/pci/pcitest.c
View File

@ -30,14 +30,17 @@ struct pci_test {
int irqtype;
bool set_irqtype;
bool get_irqtype;
bool clear_irq;
bool read;
bool write;
bool copy;
unsigned long size;
bool use_dma;
};
static int run_test(struct pci_test *test)
{
struct pci_endpoint_test_xfer_param param;
int ret = -EINVAL;
int fd;
@ -74,6 +77,15 @@ static int run_test(struct pci_test *test)
fprintf(stdout, "%s\n", irq[ret]);
}
if (test->clear_irq) {
ret = ioctl(fd, PCITEST_CLEAR_IRQ);
fprintf(stdout, "CLEAR IRQ:\t\t");
if (ret < 0)
fprintf(stdout, "FAILED\n");
else
fprintf(stdout, "%s\n", result[ret]);
}
if (test->legacyirq) {
ret = ioctl(fd, PCITEST_LEGACY_IRQ, 0);
fprintf(stdout, "LEGACY IRQ:\t");
@ -102,7 +114,10 @@ static int run_test(struct pci_test *test)
}
if (test->write) {
ret = ioctl(fd, PCITEST_WRITE, test->size);
param.size = test->size;
if (test->use_dma)
param.flags = PCITEST_FLAGS_USE_DMA;
ret = ioctl(fd, PCITEST_WRITE, &param);
fprintf(stdout, "WRITE (%7ld bytes):\t\t", test->size);
if (ret < 0)
fprintf(stdout, "TEST FAILED\n");
@ -111,7 +126,10 @@ static int run_test(struct pci_test *test)
}
if (test->read) {
ret = ioctl(fd, PCITEST_READ, test->size);
param.size = test->size;
if (test->use_dma)
param.flags = PCITEST_FLAGS_USE_DMA;
ret = ioctl(fd, PCITEST_READ, &param);
fprintf(stdout, "READ (%7ld bytes):\t\t", test->size);
if (ret < 0)
fprintf(stdout, "TEST FAILED\n");
@ -120,7 +138,10 @@ static int run_test(struct pci_test *test)
}
if (test->copy) {
ret = ioctl(fd, PCITEST_COPY, test->size);
param.size = test->size;
if (test->use_dma)
param.flags = PCITEST_FLAGS_USE_DMA;
ret = ioctl(fd, PCITEST_COPY, &param);
fprintf(stdout, "COPY (%7ld bytes):\t\t", test->size);
if (ret < 0)
fprintf(stdout, "TEST FAILED\n");
@ -153,7 +174,7 @@ int main(int argc, char **argv)
/* set default endpoint device */
test->device = "/dev/pci-endpoint-test.0";
while ((c = getopt(argc, argv, "D:b:m:x:i:Ilhrwcs:")) != EOF)
while ((c = getopt(argc, argv, "D:b:m:x:i:deIlhrwcs:")) != EOF)
switch (c) {
case 'D':
test->device = optarg;
@ -194,9 +215,15 @@ int main(int argc, char **argv)
case 'c':
test->copy = true;
continue;
case 'e':
test->clear_irq = true;
continue;
case 's':
test->size = strtoul(optarg, NULL, 0);
continue;
case 'd':
test->use_dma = true;
continue;
case 'h':
default:
usage:
@ -208,7 +235,9 @@ usage:
"\t-m <msi num> MSI test (msi number between 1..32)\n"
"\t-x <msix num> \tMSI-X test (msix number between 1..2048)\n"
"\t-i <irq type> \tSet IRQ type (0 - Legacy, 1 - MSI, 2 - MSI-X)\n"
"\t-e Clear IRQ\n"
"\t-I Get current IRQ type configured\n"
"\t-d Use DMA\n"
"\t-l Legacy IRQ test\n"
"\t-r Read buffer test\n"
"\t-w Write buffer test\n"