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pci-v5.9-changes

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Merge tag 'pci-v5.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "Enumeration:
   - Fix pci_cfg_wait queue locking problem (Bjorn Helgaas)
   - Convert PCIe capability PCIBIOS errors to errno (Bolarinwa Olayemi
     Saheed)
   - Align PCIe capability and PCI accessor return values (Bolarinwa
     Olayemi Saheed)
   - Fix pci_create_slot() reference count leak (Qiushi Wu)
   - Announce device after early fixups (Tiezhu Yang)

  PCI device hotplug:
   - Make rpadlpar functions static (Wei Yongjun)

  Driver binding:
   - Add device even if driver attach failed (Rajat Jain)

  Virtualization:
   - xen: Remove redundant initialization of irq (Colin Ian King)

  IOMMU:
   - Add pci_pri_supported() to check device or associated PF (Ashok Raj)
   - Release IVRS table in AMD ACS quirk (Hanjun Guo)
   - Mark AMD Navi10 GPU rev 0x00 ATS as broken (Kai-Heng Feng)
   - Treat "external-facing" devices themselves as internal (Rajat Jain)

  MSI:
   - Forward MSI-X error code in pci_alloc_irq_vectors_affinity() (Piotr
     Stankiewicz)

  Error handling:
   - Clear PCIe Device Status errors only if OS owns AER (Jonathan
     Cameron)
   - Log correctable errors as warning, not error (Matt Jolly)
   - Use 'pci_channel_state_t' instead of 'enum pci_channel_state' (Luc
     Van Oostenryck)

  Peer-to-peer DMA:
   - Allow P2PDMA on AMD Zen and newer CPUs (Logan Gunthorpe)

  ASPM:
   - Add missing newline in sysfs 'policy' (Xiongfeng Wang)

  Native PCIe controllers:
   - Convert to devm_platform_ioremap_resource_byname() (Dejin Zheng)
   - Convert to devm_platform_ioremap_resource() (Dejin Zheng)
   - Remove duplicate error message from devm_pci_remap_cfg_resource()
     callers (Dejin Zheng)
   - Fix runtime PM imbalance on error (Dinghao Liu)
   - Remove dev_err() when handing an error from platform_get_irq()
     (Krzysztof Wilczyński)
   - Use pci_host_bridge.windows list directly instead of splicing in a
     temporary list for cadence, mvebu, host-common (Rob Herring)
   - Use pci_host_probe() instead of open-coding all the pieces for
     altera, brcmstb, iproc, mobiveil, rcar, rockchip, tegra, v3,
     versatile, xgene, xilinx, xilinx-nwl (Rob Herring)
   - Default host bridge parent device to the platform device (Rob
     Herring)
   - Use pci_is_root_bus() instead of tracking root bus number
     separately in aardvark, designware (imx6, keystone,
     designware-host), mobiveil, xilinx-nwl, xilinx, rockchip, rcar (Rob
     Herring)
   - Set host bridge bus number in pci_scan_root_bus_bridge() instead of
     each driver for aardvark, designware-host, host-common, mediatek,
     rcar, tegra, v3-semi (Rob Herring)
   - Move DT resource setup into devm_pci_alloc_host_bridge() (Rob
     Herring)
   - Set bridge map_irq and swizzle_irq to default functions; drivers
     that don't support legacy IRQs (iproc) need to undo this (Rob
     Herring)

  ARM Versatile PCIe controller driver:
   - Drop flag PCI_ENABLE_PROC_DOMAINS (Rob Herring)

  Cadence PCIe controller driver:
   - Use "dma-ranges" instead of "cdns,no-bar-match-nbits" property
     (Kishon Vijay Abraham I)
   - Remove "mem" from reg binding (Kishon Vijay Abraham I)
   - Fix cdns_pcie_{host|ep}_setup() error path (Kishon Vijay Abraham I)
   - Convert all r/w accessors to perform only 32-bit accesses (Kishon
     Vijay Abraham I)
   - Add support to start link and verify link status (Kishon Vijay
     Abraham I)
   - Allow pci_host_bridge to have custom pci_ops (Kishon Vijay Abraham I)
   - Add new *ops* for CPU addr fixup (Kishon Vijay Abraham I)
   - Fix updating Vendor ID and Subsystem Vendor ID register (Kishon
     Vijay Abraham I)
   - Use bridge resources for outbound window setup (Rob Herring)
   - Remove private bus number and range storage (Rob Herring)

  Cadence PCIe endpoint driver:
   - Add MSI-X support (Alan Douglas)

  HiSilicon PCIe controller driver:
   - Remove non-ECAM HiSilicon hip05/hip06 driver (Rob Herring)

  Intel VMD host bridge driver:
   - Use Shadow MEMBAR registers for QEMU/KVM guests (Jon Derrick)

  Loongson PCIe controller driver:
   - Use DECLARE_PCI_FIXUP_EARLY for bridge_class_quirk() (Tiezhu Yang)

  Marvell Aardvark PCIe controller driver:
   - Indicate error in 'val' when config read fails (Pali Rohár)
   - Don't touch PCIe registers if no card connected (Pali Rohár)

  Marvell MVEBU PCIe controller driver:
   - Setup BAR0 in order to fix MSI (Shmuel Hazan)

  Microsoft Hyper-V host bridge driver:
   - Fix a timing issue which causes kdump to fail occasionally (Wei Hu)
   - Make some functions static (Wei Yongjun)

  NVIDIA Tegra PCIe controller driver:
   - Revert tegra124 raw_violation_fixup (Nicolas Chauvet)
   - Remove PLL power supplies (Thierry Reding)

  Qualcomm PCIe controller driver:
   - Change duplicate PCI reset to phy reset (Abhishek Sahu)
   - Add missing ipq806x clocks in PCIe driver (Ansuel Smith)
   - Add missing reset for ipq806x (Ansuel Smith)
   - Add ext reset (Ansuel Smith)
   - Use bulk clk API and assert on error (Ansuel Smith)
   - Add support for tx term offset for rev 2.1.0 (Ansuel Smith)
   - Define some PARF params needed for ipq8064 SoC (Ansuel Smith)
   - Add ipq8064 rev2 variant (Ansuel Smith)
   - Support PCI speed set for ipq806x (Sham Muthayyan)

  Renesas R-Car PCIe controller driver:
   - Use devm_pci_alloc_host_bridge() (Rob Herring)
   - Use struct pci_host_bridge.windows list directly (Rob Herring)
   - Convert rcar-gen2 to use modern host bridge probe functions (Rob
     Herring)

  TI J721E PCIe driver:
   - Add TI J721E PCIe host and endpoint driver (Kishon Vijay Abraham I)

  Xilinx Versal CPM PCIe controller driver:
   - Add Versal CPM Root Port driver and YAML schema (Bharat Kumar
     Gogada)

  MicroSemi Switchtec management driver:
   - Add missing __iomem and __user tags to fix sparse warnings (Logan
     Gunthorpe)

  Miscellaneous:
   - Replace http:// links with https:// (Alexander A. Klimov)
   - Replace lkml.org, spinics, gmane with lore.kernel.org (Bjorn
     Helgaas)
   - Remove unused pci_lost_interrupt() (Heiner Kallweit)
   - Move PCI_VENDOR_ID_REDHAT definition to pci_ids.h (Huacai Chen)
   - Fix kerneldoc warnings (Krzysztof Kozlowski)"

* tag 'pci-v5.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (113 commits)
  PCI: Fix kerneldoc warnings
  PCI: xilinx-cpm: Add Versal CPM Root Port driver
  PCI: xilinx-cpm: Add YAML schemas for Versal CPM Root Port
  PCI: Set bridge map_irq and swizzle_irq to default functions
  PCI: Move DT resource setup into devm_pci_alloc_host_bridge()
  PCI: rcar-gen2: Convert to use modern host bridge probe functions
  PCI: Remove dev_err() when handing an error from platform_get_irq()
  MAINTAINERS: Add Kishon Vijay Abraham I for TI J721E SoC PCIe
  misc: pci_endpoint_test: Add J721E in pci_device_id table
  PCI: j721e: Add TI J721E PCIe driver
  PCI: switchtec: Add missing __iomem tag to fix sparse warnings
  PCI: switchtec: Add missing __iomem and __user tags to fix sparse warnings
  PCI: rpadlpar: Make functions static
  PCI/P2PDMA: Allow P2PDMA on AMD Zen and newer CPUs
  PCI: Release IVRS table in AMD ACS quirk
  PCI: Announce device after early fixups
  PCI: Mark AMD Navi10 GPU rev 0x00 ATS as broken
  PCI: Remove unused pci_lost_interrupt()
  dt-bindings: PCI: Add EP mode dt-bindings for TI's J721E SoC
  dt-bindings: PCI: Add host mode dt-bindings for TI's J721E SoC
  ...
This commit is contained in:
Linus Torvalds 2020-08-07 18:48:15 -07:00
commit 049eb096da
131 changed files with 2917 additions and 1757 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Documentation/PCI/pci-error-recovery.rst
View File

@ -79,7 +79,7 @@ This structure has the form::
struct pci_error_handlers
{
int (*error_detected)(struct pci_dev *dev, enum pci_channel_state);
int (*error_detected)(struct pci_dev *dev, pci_channel_state_t);
int (*mmio_enabled)(struct pci_dev *dev);
int (*slot_reset)(struct pci_dev *dev);
void (*resume)(struct pci_dev *dev);
@ -87,11 +87,11 @@ This structure has the form::
The possible channel states are::
enum pci_channel_state {
typedef enum {
pci_channel_io_normal, /* I/O channel is in normal state */
pci_channel_io_frozen, /* I/O to channel is blocked */
pci_channel_io_perm_failure, /* PCI card is dead */
};
} pci_channel_state_t;
Possible return values are::
@ -348,7 +348,7 @@ STEP 6: Permanent Failure
-------------------------
A "permanent failure" has occurred, and the platform cannot recover
the device. The platform will call error_detected() with a
pci_channel_state value of pci_channel_io_perm_failure.
pci_channel_state_t value of pci_channel_io_perm_failure.
The device driver should, at this point, assume the worst. It should
cancel all pending I/O, refuse all new I/O, returning -EIO to

9
Documentation/PCI/pci.rst
View File

@ -17,7 +17,7 @@ PCI device drivers.
A more complete resource is the third edition of "Linux Device Drivers"
by Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman.
LDD3 is available for free (under Creative Commons License) from:
http://lwn.net/Kernel/LDD3/.
https://lwn.net/Kernel/LDD3/.
However, keep in mind that all documents are subject to "bit rot".
Refer to the source code if things are not working as described here.
@ -214,7 +214,7 @@ the PCI device by calling pci_enable_device(). This will:
problem and unlikely to get fixed soon.
This has been discussed before but not changed as of 2.6.19:
http://lkml.org/lkml/2006/3/2/194
https://lore.kernel.org/r/20060302180025.GC28895@flint.arm.linux.org.uk/
pci_set_master() will enable DMA by setting the bus master bit
@ -514,9 +514,8 @@ your driver if they're helpful, or just use plain hex constants.
The device IDs are arbitrary hex numbers (vendor controlled) and normally used
only in a single location, the pci_device_id table.
Please DO submit new vendor/device IDs to http://pci-ids.ucw.cz/.
There are mirrors of the pci.ids file at http://pciids.sourceforge.net/
and https://github.com/pciutils/pciids.
Please DO submit new vendor/device IDs to https://pci-ids.ucw.cz/.
There's a mirror of the pci.ids file at https://github.com/pciutils/pciids.
Obsolete functions

8
Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.yaml
View File

@ -18,13 +18,12 @@ properties:
const: cdns,cdns-pcie-host
reg:
maxItems: 3
maxItems: 2
reg-names:
items:
- const: reg
- const: cfg
- const: mem
msi-parent: true
@ -49,9 +48,8 @@ examples:
device-id = <0x0200>;
reg = <0x0 0xfb000000 0x0 0x01000000>,
<0x0 0x41000000 0x0 0x00001000>,
<0x0 0x40000000 0x0 0x04000000>;
reg-names = "reg", "cfg", "mem";
<0x0 0x41000000 0x0 0x00001000>;
reg-names = "reg", "cfg";
ranges = <0x02000000 0x0 0x42000000 0x0 0x42000000 0x0 0x1000000>,
<0x01000000 0x0 0x43000000 0x0 0x43000000 0x0 0x0010000>;

12
Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
View File

@ -112,28 +112,16 @@ Power supplies for Tegra124:
- Required:
- avddio-pex-supply: Power supply for analog PCIe logic. Must supply 1.05 V.
- dvddio-pex-supply: Power supply for digital PCIe I/O. Must supply 1.05 V.
- avdd-pex-pll-supply: Power supply for dedicated (internal) PCIe PLL. Must
supply 1.05 V.
- hvdd-pex-supply: High-voltage supply for PCIe I/O and PCIe output clocks.
Must supply 3.3 V.
- hvdd-pex-pll-e-supply: High-voltage supply for PLLE (shared with USB3).
Must supply 3.3 V.
- vddio-pex-ctl-supply: Power supply for PCIe control I/O partition. Must
supply 2.8-3.3 V.
- avdd-pll-erefe-supply: Power supply for PLLE (shared with USB3). Must
supply 1.05 V.
Power supplies for Tegra210:
- Required:
- avdd-pll-uerefe-supply: Power supply for PLLE (shared with USB3). Must
supply 1.05 V.
- hvddio-pex-supply: High-voltage supply for PCIe I/O and PCIe output
clocks. Must supply 1.8 V.
- dvddio-pex-supply: Power supply for digital PCIe I/O. Must supply 1.05 V.
- dvdd-pex-pll-supply: Power supply for dedicated (internal) PCIe PLL. Must
supply 1.05 V.
- hvdd-pex-pll-e-supply: High-voltage supply for PLLE (shared with USB3).
Must supply 3.3 V.
- vddio-pex-ctl-supply: Power supply for PCIe control I/O partition. Must
supply 1.8 V.

4
Documentation/devicetree/bindings/pci/pci.txt
View File

@ -1,12 +1,12 @@
PCI bus bridges have standardized Device Tree bindings:
PCI Bus Binding to: IEEE Std 1275-1994
http://www.devicetree.org/open-firmware/bindings/pci/pci2_1.pdf
https://www.devicetree.org/open-firmware/bindings/pci/pci2_1.pdf
And for the interrupt mapping part:
Open Firmware Recommended Practice: Interrupt Mapping
http://www.devicetree.org/open-firmware/practice/imap/imap0_9d.pdf
https://www.devicetree.org/open-firmware/practice/imap/imap0_9d.pdf
Additionally to the properties specified in the above standards a host bridge
driver implementation may support the following properties:

15
Documentation/devicetree/bindings/pci/qcom,pcie.txt
View File

@ -5,6 +5,7 @@
Value type: <stringlist>
Definition: Value should contain
- "qcom,pcie-ipq8064" for ipq8064
- "qcom,pcie-ipq8064-v2" for ipq8064 rev 2 or ipq8065
- "qcom,pcie-apq8064" for apq8064
- "qcom,pcie-apq8084" for apq8084
- "qcom,pcie-msm8996" for msm8996 or apq8096
@ -90,6 +91,8 @@
Definition: Should contain the following entries
- "core" Clocks the pcie hw block
- "phy" Clocks the pcie PHY block
- "aux" Clocks the pcie AUX block
- "ref" Clocks the pcie ref block
- clock-names:
Usage: required for apq8084/ipq4019
Value type: <stringlist>
@ -177,6 +180,7 @@
- "pwr" PWR reset
- "ahb" AHB reset
- "phy_ahb" PHY AHB reset
- "ext" EXT reset
- reset-names:
Usage: required for ipq8074
@ -277,14 +281,17 @@
<0 0 0 4 &intc 0 39 IRQ_TYPE_LEVEL_HIGH>; /* int_d */
clocks = <&gcc PCIE_A_CLK>,
<&gcc PCIE_H_CLK>,
<&gcc PCIE_PHY_CLK>;
clock-names = "core", "iface", "phy";
<&gcc PCIE_PHY_CLK>,
<&gcc PCIE_AUX_CLK>,
<&gcc PCIE_ALT_REF_CLK>;
clock-names = "core", "iface", "phy", "aux", "ref";
resets = <&gcc PCIE_ACLK_RESET>,
<&gcc PCIE_HCLK_RESET>,
<&gcc PCIE_POR_RESET>,
<&gcc PCIE_PCI_RESET>,
<&gcc PCIE_PHY_RESET>;
reset-names = "axi", "ahb", "por", "pci", "phy";
<&gcc PCIE_PHY_RESET>,
<&gcc PCIE_EXT_RESET>;
reset-names = "axi", "ahb", "por", "pci", "phy", "ext";
pinctrl-0 = <&pcie_pins_default>;
pinctrl-names = "default";
};

94
Documentation/devicetree/bindings/pci/ti,j721e-pci-ep.yaml Normal file
View File

@ -0,0 +1,94 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
%YAML 1.2
---
$id: "http://devicetree.org/schemas/pci/ti,j721e-pci-ep.yaml#"
$schema: "http://devicetree.org/meta-schemas/core.yaml#"
title: TI J721E PCI EP (PCIe Wrapper)
maintainers:
- Kishon Vijay Abraham I <kishon@ti.com>
allOf:
- $ref: "cdns-pcie-ep.yaml#"
properties:
compatible:
enum:
- ti,j721e-pcie-ep
reg:
maxItems: 4
reg-names:
items:
- const: intd_cfg
- const: user_cfg
- const: reg
- const: mem
ti,syscon-pcie-ctrl:
description: Phandle to the SYSCON entry required for configuring PCIe mode
and link speed.
allOf:
- $ref: /schemas/types.yaml#/definitions/phandle
power-domains:
maxItems: 1
clocks:
maxItems: 1
description: clock-specifier to represent input to the PCIe
clock-names:
items:
- const: fck
dma-coherent:
description: Indicates that the PCIe IP block can ensure the coherency
required:
- compatible
- reg
- reg-names
- ti,syscon-pcie-ctrl
- max-link-speed
- num-lanes
- power-domains
- clocks
- clock-names
- cdns,max-outbound-regions
- dma-coherent
- max-functions
- phys
- phy-names
examples:
- |
#include <dt-bindings/soc/ti,sci_pm_domain.h>
bus {
#address-cells = <2>;
#size-cells = <2>;
pcie0_ep: pcie-ep@d000000 {
compatible = "ti,j721e-pcie-ep";
reg = <0x00 0x02900000 0x00 0x1000>,
<0x00 0x02907000 0x00 0x400>,
<0x00 0x0d000000 0x00 0x00800000>,
<0x00 0x10000000 0x00 0x08000000>;
reg-names = "intd_cfg", "user_cfg", "reg", "mem";
ti,syscon-pcie-ctrl = <&pcie0_ctrl>;
max-link-speed = <3>;
num-lanes = <2>;
power-domains = <&k3_pds 239 TI_SCI_PD_EXCLUSIVE>;
clocks = <&k3_clks 239 1>;
clock-names = "fck";
cdns,max-outbound-regions = <16>;
max-functions = /bits/ 8 <6>;
dma-coherent;
phys = <&serdes0_pcie_link>;
phy-names = "pcie-phy";
};
};

113
Documentation/devicetree/bindings/pci/ti,j721e-pci-host.yaml Normal file
View File

@ -0,0 +1,113 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
%YAML 1.2
---
$id: "http://devicetree.org/schemas/pci/ti,j721e-pci-host.yaml#"
$schema: "http://devicetree.org/meta-schemas/core.yaml#"
title: TI J721E PCI Host (PCIe Wrapper)
maintainers:
- Kishon Vijay Abraham I <kishon@ti.com>
allOf:
- $ref: "cdns-pcie-host.yaml#"
properties:
compatible:
enum:
- ti,j721e-pcie-host
reg:
maxItems: 4
reg-names:
items:
- const: intd_cfg
- const: user_cfg
- const: reg
- const: cfg
ti,syscon-pcie-ctrl:
description: Phandle to the SYSCON entry required for configuring PCIe mode
and link speed.
allOf:
- $ref: /schemas/types.yaml#/definitions/phandle
power-domains:
maxItems: 1
clocks:
maxItems: 1
description: clock-specifier to represent input to the PCIe
clock-names:
items:
- const: fck
vendor-id:
const: 0x104c
device-id:
const: 0xb00d
msi-map: true
required:
- compatible
- reg
- reg-names
- ti,syscon-pcie-ctrl
- max-link-speed
- num-lanes
- power-domains
- clocks
- clock-names
- vendor-id
- device-id
- msi-map
- dma-coherent
- dma-ranges
- ranges
- reset-gpios
- phys
- phy-names
examples:
- |
#include <dt-bindings/soc/ti,sci_pm_domain.h>
#include <dt-bindings/gpio/gpio.h>
bus {
#address-cells = <2>;
#size-cells = <2>;
pcie0_rc: pcie@2900000 {
compatible = "ti,j721e-pcie-host";
reg = <0x00 0x02900000 0x00 0x1000>,
<0x00 0x02907000 0x00 0x400>,
<0x00 0x0d000000 0x00 0x00800000>,
<0x00 0x10000000 0x00 0x00001000>;
reg-names = "intd_cfg", "user_cfg", "reg", "cfg";
ti,syscon-pcie-ctrl = <&pcie0_ctrl>;
max-link-speed = <3>;
num-lanes = <2>;
power-domains = <&k3_pds 239 TI_SCI_PD_EXCLUSIVE>;
clocks = <&k3_clks 239 1>;
clock-names = "fck";
device_type = "pci";
#address-cells = <3>;
#size-cells = <2>;
bus-range = <0x0 0xf>;
vendor-id = <0x104c>;
device-id = <0xb00d>;
msi-map = <0x0 &gic_its 0x0 0x10000>;
dma-coherent;
reset-gpios = <&exp1 6 GPIO_ACTIVE_HIGH>;
phys = <&serdes0_pcie_link>;
phy-names = "pcie-phy";
ranges = <0x01000000 0x0 0x10001000 0x00 0x10001000 0x0 0x0010000>,
<0x02000000 0x0 0x10011000 0x00 0x10011000 0x0 0x7fef000>;
dma-ranges = <0x02000000 0x0 0x0 0x0 0x0 0x10000 0x0>;
};
};

99
Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml Normal file
View File

@ -0,0 +1,99 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pci/xilinx-versal-cpm.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: CPM Host Controller device tree for Xilinx Versal SoCs
maintainers:
- Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
allOf:
- $ref: /schemas/pci/pci-bus.yaml#
properties:
compatible:
const: xlnx,versal-cpm-host-1.00
reg:
items:
- description: Configuration space region and bridge registers.
- description: CPM system level control and status registers.
reg-names:
items:
- const: cfg
- const: cpm_slcr
interrupts:
maxItems: 1
msi-map:
description:
Maps a Requester ID to an MSI controller and associated MSI sideband data.
ranges:
maxItems: 2
"#interrupt-cells":
const: 1
interrupt-controller:
description: Interrupt controller node for handling legacy PCI interrupts.
type: object
properties:
"#address-cells":
const: 0
"#interrupt-cells":
const: 1
"interrupt-controller": true
additionalProperties: false
required:
- reg
- reg-names
- "#interrupt-cells"
- interrupts
- interrupt-parent
- interrupt-map
- interrupt-map-mask
- bus-range
- msi-map
- interrupt-controller
unevaluatedProperties: false
examples:
- |
versal {
#address-cells = <2>;
#size-cells = <2>;
cpm_pcie: pcie@fca10000 {
compatible = "xlnx,versal-cpm-host-1.00";
device_type = "pci";
#address-cells = <3>;
#interrupt-cells = <1>;
#size-cells = <2>;
interrupts = <0 72 4>;
interrupt-parent = <&gic>;
interrupt-map-mask = <0 0 0 7>;
interrupt-map = <0 0 0 1 &pcie_intc_0 0>,
<0 0 0 2 &pcie_intc_0 1>,
<0 0 0 3 &pcie_intc_0 2>,
<0 0 0 4 &pcie_intc_0 3>;
bus-range = <0x00 0xff>;
ranges = <0x02000000 0x0 0xe0000000 0x0 0xe0000000 0x0 0x10000000>,
<0x43000000 0x80 0x00000000 0x80 0x00000000 0x0 0x80000000>;
msi-map = <0x0 &its_gic 0x0 0x10000>;
reg = <0x6 0x00000000 0x0 0x10000000>,
<0x0 0xfca10000 0x0 0x1000>;
reg-names = "cfg", "cpm_slcr";
pcie_intc_0: interrupt-controller {
#address-cells = <0>;
#interrupt-cells = <1>;
interrupt-controller;
};
};
};

4
MAINTAINERS
View File

@ -13295,12 +13295,14 @@ S: Maintained
F: Documentation/devicetree/bindings/pci/designware-pcie.txt
F: drivers/pci/controller/dwc/*designware*
PCI DRIVER FOR TI DRA7XX
PCI DRIVER FOR TI DRA7XX/J721E
M: Kishon Vijay Abraham I <kishon@ti.com>
L: linux-omap@vger.kernel.org
L: linux-pci@vger.kernel.org
L: linux-arm-kernel@lists.infradead.org
S: Supported
F: Documentation/devicetree/bindings/pci/ti-pci.txt
F: drivers/pci/controller/cadence/pci-j721e.c
F: drivers/pci/controller/dwc/pci-dra7xx.c
PCI DRIVER FOR TI KEYSTONE

2
arch/powerpc/kernel/eeh_driver.c
View File

@ -214,7 +214,7 @@ static void eeh_dev_save_state(struct eeh_dev *edev, void *userdata)
pci_save_state(pdev);
}
static void eeh_set_channel_state(struct eeh_pe *root, enum pci_channel_state s)
static void eeh_set_channel_state(struct eeh_pe *root, pci_channel_state_t s)
{
struct eeh_pe *pe;
struct eeh_dev *edev, *tmp;

4
arch/x86/pci/fixup.c
View File

@ -557,12 +557,12 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27B9, twinhead_reserve_killing_z
* Device [8086:2fc0]
* Erratum HSE43
* CONFIG_TDP_NOMINAL CSR Implemented at Incorrect Offset
* http://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v3-spec-update.html
* https://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v3-spec-update.html
*
* Devices [8086:6f60,6fa0,6fc0]
* Erratum BDF2
* PCI BARs in the Home Agent Will Return Non-Zero Values During Enumeration
* http://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v4-spec-update.html
* https://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v4-spec-update.html
*/
static void pci_invalid_bar(struct pci_dev *dev)
{

2
arch/x86/pci/xen.c
View File

@ -62,7 +62,7 @@ static int xen_pcifront_enable_irq(struct pci_dev *dev)
#ifdef CONFIG_ACPI
static int xen_register_pirq(u32 gsi, int triggering, bool set_pirq)
{
int rc, pirq = -1, irq = -1;
int rc, pirq = -1, irq;
struct physdev_map_pirq map_irq;
int shareable = 0;
char *name;

2
drivers/block/rsxx/core.c
View File

@ -627,7 +627,7 @@ static int rsxx_eeh_fifo_flush_poll(struct rsxx_cardinfo *card)
}
static pci_ers_result_t rsxx_error_detected(struct pci_dev *dev,
enum pci_channel_state error)
pci_channel_state_t error)
{
int st;

6
drivers/dma/ioat/init.c
View File

@ -1195,13 +1195,13 @@ static int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca)
/* disable relaxed ordering */
err = pcie_capability_read_word(pdev, IOAT_DEVCTRL_OFFSET, &val16);
if (err)
return err;
return pcibios_err_to_errno(err);
/* clear relaxed ordering enable */
val16 &= ~IOAT_DEVCTRL_ROE;
err = pcie_capability_write_word(pdev, IOAT_DEVCTRL_OFFSET, val16);
if (err)
return err;
return pcibios_err_to_errno(err);
if (ioat_dma->cap & IOAT_CAP_DPS)
writeb(ioat_pending_level + 1,
@ -1267,7 +1267,7 @@ static void ioat_resume(struct ioatdma_device *ioat_dma)
#define DRV_NAME "ioatdma"
static pci_ers_result_t ioat_pcie_error_detected(struct pci_dev *pdev,
enum pci_channel_state error)
pci_channel_state_t error)
{
dev_dbg(&pdev->dev, "%s: PCIe AER error %d\n", DRV_NAME, error);

2
drivers/gpu/drm/qxl/qxl_dev.h
View File

@ -131,8 +131,6 @@ enum SpiceCursorType {
#pragma pack(push, 1)
#define REDHAT_PCI_VENDOR_ID 0x1b36
/* 0x100-0x11f reserved for spice, 0x1ff used for unstable work */
#define QXL_DEVICE_ID_STABLE 0x0100

8
drivers/iommu/intel/iommu.c
View File

@ -2560,7 +2560,7 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
}
if (info->ats_supported && ecap_prs(iommu->ecap) &&
pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI))
pci_pri_supported(pdev))
info->pri_supported = 1;
}
}
@ -4738,12 +4738,12 @@ const struct attribute_group *intel_iommu_groups[] = {
NULL,
};
static inline bool has_untrusted_dev(void)
static inline bool has_external_pci(void)
{
struct pci_dev *pdev = NULL;
for_each_pci_dev(pdev)
if (pdev->untrusted)
if (pdev->external_facing)
return true;
return false;
@ -4751,7 +4751,7 @@ static inline bool has_untrusted_dev(void)
static int __init platform_optin_force_iommu(void)
{
if (!dmar_platform_optin() || no_platform_optin || !has_untrusted_dev())
if (!dmar_platform_optin() || no_platform_optin || !has_external_pci())
return 0;
if (no_iommu || dmar_disabled)

2
drivers/media/pci/ngene/ngene-cards.c
View File

@ -1186,7 +1186,7 @@ MODULE_DEVICE_TABLE(pci, ngene_id_tbl);
/****************************************************************************/
static pci_ers_result_t ngene_error_detected(struct pci_dev *dev,
enum pci_channel_state state)
pci_channel_state_t state)
{
dev_err(&dev->dev, "PCI error\n");
if (state == pci_channel_io_perm_failure)

2
drivers/misc/genwqe/card_base.c
View File

@ -1256,7 +1256,7 @@ static void genwqe_remove(struct pci_dev *pci_dev)
* error is detected.
*/
static pci_ers_result_t genwqe_err_error_detected(struct pci_dev *pci_dev,
enum pci_channel_state state)
pci_channel_state_t state)
{
struct genwqe_dev *cd;

9
drivers/misc/pci_endpoint_test.c
View File

@ -68,6 +68,7 @@
#define PCI_ENDPOINT_TEST_FLAGS 0x2c
#define FLAG_USE_DMA BIT(0)
#define PCI_DEVICE_ID_TI_J721E 0xb00d
#define PCI_DEVICE_ID_TI_AM654 0xb00c
#define is_am654_pci_dev(pdev) \
@ -932,6 +933,11 @@ static const struct pci_endpoint_test_data am654_data = {
.irq_type = IRQ_TYPE_MSI,
};
static const struct pci_endpoint_test_data j721e_data = {
.alignment = 256,
.irq_type = IRQ_TYPE_MSI,
};
static const struct pci_device_id pci_endpoint_test_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA74x),
.driver_data = (kernel_ulong_t)&default_data,
@ -946,6 +952,9 @@ static const struct pci_device_id pci_endpoint_test_tbl[] = {
},
{ PCI_DEVICE(PCI_VENDOR_ID_RENESAS, PCI_DEVICE_ID_RENESAS_R8A774C0),
},
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_J721E),
.driver_data = (kernel_ulong_t)&j721e_data,
},
{ }
};
MODULE_DEVICE_TABLE(pci, pci_endpoint_test_tbl);

2
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -15585,7 +15585,7 @@ unmap:
* remediation.
**/
static pci_ers_result_t i40e_pci_error_detected(struct pci_dev *pdev,
enum pci_channel_state error)
pci_channel_state_t error)
{
struct i40e_pf *pf = pci_get_drvdata(pdev);

2
drivers/net/ethernet/intel/ice/ice_main.c
View File

@ -4593,7 +4593,7 @@ static int __maybe_unused ice_resume(struct device *dev)
* is in progress. Allows the driver to gracefully prepare/handle PCI errors.
*/
static pci_ers_result_t
ice_pci_err_detected(struct pci_dev *pdev, enum pci_channel_state err)
ice_pci_err_detected(struct pci_dev *pdev, pci_channel_state_t err)
{
struct ice_pf *pf = pci_get_drvdata(pdev);

4
drivers/net/ethernet/intel/ixgb/ixgb_main.c
View File

@ -79,7 +79,7 @@ static int ixgb_vlan_rx_kill_vid(struct net_device *netdev,
static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
enum pci_channel_state state);
pci_channel_state_t state);
static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
static void ixgb_io_resume (struct pci_dev *pdev);
@ -2190,7 +2190,7 @@ ixgb_restore_vlan(struct ixgb_adapter *adapter)
* a PCI bus error is detected.
*/
static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
enum pci_channel_state state)
pci_channel_state_t state)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct ixgb_adapter *adapter = netdev_priv(netdev);

1
drivers/net/ethernet/rocker/rocker_hw.h
View File

@ -25,7 +25,6 @@ enum {
#define ROCKER_FP_PORTS_MAX 62
#define PCI_VENDOR_ID_REDHAT 0x1b36
#define PCI_DEVICE_ID_REDHAT_ROCKER 0x0006
#define ROCKER_PCI_BAR0_SIZE 0x2000

2
drivers/net/ethernet/sfc/efx_common.c
View File

@ -1229,7 +1229,7 @@ void efx_fini_mcdi_logging(struct efx_nic *efx)
* Stop the software path and request a slot reset.
*/
static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev,
enum pci_channel_state state)
pci_channel_state_t state)
{
pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
struct efx_nic *efx = pci_get_drvdata(pdev);

2
drivers/net/ethernet/sfc/falcon/efx.c
View File

@ -3118,7 +3118,7 @@ static const struct dev_pm_ops ef4_pm_ops = {
* Stop the software path and request a slot reset.
*/
static pci_ers_result_t ef4_io_error_detected(struct pci_dev *pdev,
enum pci_channel_state state)
pci_channel_state_t state)
{
pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
struct ef4_nic *efx = pci_get_drvdata(pdev);

16
drivers/pci/access.c
View File

@ -204,17 +204,13 @@ EXPORT_SYMBOL(pci_bus_set_ops);
static DECLARE_WAIT_QUEUE_HEAD(pci_cfg_wait);
static noinline void pci_wait_cfg(struct pci_dev *dev)
__must_hold(&pci_lock)
{
DECLARE_WAITQUEUE(wait, current);
__add_wait_queue(&pci_cfg_wait, &wait);
do {
set_current_state(TASK_UNINTERRUPTIBLE);
raw_spin_unlock_irq(&pci_lock);
schedule();
wait_event(pci_cfg_wait, !dev->block_cfg_access);
raw_spin_lock_irq(&pci_lock);
} while (dev->block_cfg_access);
__remove_wait_queue(&pci_cfg_wait, &wait);
}
/* Returns 0 on success, negative values indicate error. */
@ -409,7 +405,7 @@ int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val)
*val = 0;
if (pos & 1)
return -EINVAL;
return PCIBIOS_BAD_REGISTER_NUMBER;
if (pcie_capability_reg_implemented(dev, pos)) {
ret = pci_read_config_word(dev, pci_pcie_cap(dev) + pos, val);
@ -444,7 +440,7 @@ int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val)
*val = 0;
if (pos & 3)
return -EINVAL;
return PCIBIOS_BAD_REGISTER_NUMBER;
if (pcie_capability_reg_implemented(dev, pos)) {
ret = pci_read_config_dword(dev, pci_pcie_cap(dev) + pos, val);
@ -469,7 +465,7 @@ EXPORT_SYMBOL(pcie_capability_read_dword);
int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val)
{
if (pos & 1)
return -EINVAL;
return PCIBIOS_BAD_REGISTER_NUMBER;
if (!pcie_capability_reg_implemented(dev, pos))
return 0;
@ -481,7 +477,7 @@ EXPORT_SYMBOL(pcie_capability_write_word);
int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val)
{
if (pos & 3)
return -EINVAL;
return PCIBIOS_BAD_REGISTER_NUMBER;
if (!pcie_capability_reg_implemented(dev, pos))
return 0;

18
drivers/pci/ats.c
View File

@ -188,7 +188,8 @@ void pci_pri_init(struct pci_dev *pdev)
/**
* pci_enable_pri - Enable PRI capability
* @ pdev: PCI device structure
* @pdev: PCI device structure
* @reqs: outstanding requests
*
* Returns 0 on success, negative value on error
*/
@ -325,6 +326,21 @@ int pci_prg_resp_pasid_required(struct pci_dev *pdev)
return pdev->pasid_required;
}
/**
* pci_pri_supported - Check if PRI is supported.
* @pdev: PCI device structure
*
* Returns true if PRI capability is present, false otherwise.
*/
bool pci_pri_supported(struct pci_dev *pdev)
{
/* VFs share the PF PRI */
if (pci_physfn(pdev)->pri_cap)
return true;
return false;
}
EXPORT_SYMBOL_GPL(pci_pri_supported);
#endif /* CONFIG_PCI_PRI */
#ifdef CONFIG_PCI_PASID

6
drivers/pci/bus.c
View File

@ -322,12 +322,8 @@ void pci_bus_add_device(struct pci_dev *dev)
dev->match_driver = true;
retval = device_attach(&dev->dev);
if (retval < 0 && retval != -EPROBE_DEFER) {
if (retval < 0 && retval != -EPROBE_DEFER)
pci_warn(dev, "device attach failed (%d)\n", retval);
pci_proc_detach_device(dev);
pci_remove_sysfs_dev_files(dev);
return;
}
pci_dev_assign_added(dev, true);
}

8
drivers/pci/controller/Kconfig
View File

@ -99,6 +99,14 @@ config PCIE_XILINX
Say 'Y' here if you want kernel to support the Xilinx AXI PCIe
Host Bridge driver.
config PCIE_XILINX_CPM
bool "Xilinx Versal CPM host bridge support"
depends on ARCH_ZYNQMP || COMPILE_TEST
select PCI_HOST_COMMON
help
Say 'Y' here if you want kernel support for the
Xilinx Versal CPM host bridge.
config PCI_XGENE
bool "X-Gene PCIe controller"
depends on ARM64 || COMPILE_TEST

1
drivers/pci/controller/Makefile
View File

@ -13,6 +13,7 @@ obj-$(CONFIG_PCI_HOST_COMMON) += pci-host-common.o
obj-$(CONFIG_PCI_HOST_GENERIC) += pci-host-generic.o
obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx.o
obj-$(CONFIG_PCIE_XILINX_NWL) += pcie-xilinx-nwl.o
obj-$(CONFIG_PCIE_XILINX_CPM) += pcie-xilinx-cpm.o
obj-$(CONFIG_PCI_V3_SEMI) += pci-v3-semi.o
obj-$(CONFIG_PCI_XGENE_MSI) += pci-xgene-msi.o
obj-$(CONFIG_PCI_VERSATILE) += pci-versatile.o

23
drivers/pci/controller/cadence/Kconfig
View File

@ -42,4 +42,27 @@ config PCIE_CADENCE_PLAT_EP
endpoint mode. This PCIe controller may be embedded into many
different vendors SoCs.
config PCI_J721E
bool
config PCI_J721E_HOST
bool "TI J721E PCIe platform host controller"
depends on OF
select PCIE_CADENCE_HOST
select PCI_J721E
help
Say Y here if you want to support the TI J721E PCIe platform
controller in host mode. TI J721E PCIe controller uses Cadence PCIe
core.
config PCI_J721E_EP
bool "TI J721E PCIe platform endpoint controller"
depends on OF
depends on PCI_ENDPOINT
select PCIE_CADENCE_EP
select PCI_J721E
help
Say Y here if you want to support the TI J721E PCIe platform
controller in endpoint mode. TI J721E PCIe controller uses Cadence PCIe
core.
endmenu

1
drivers/pci/controller/cadence/Makefile
View File

@ -3,3 +3,4 @@ obj-$(CONFIG_PCIE_CADENCE) += pcie-cadence.o
obj-$(CONFIG_PCIE_CADENCE_HOST) += pcie-cadence-host.o
obj-$(CONFIG_PCIE_CADENCE_EP) += pcie-cadence-ep.o
obj-$(CONFIG_PCIE_CADENCE_PLAT) += pcie-cadence-plat.o
obj-$(CONFIG_PCI_J721E) += pci-j721e.o

485
drivers/pci/controller/cadence/pci-j721e.c Normal file
View File

@ -0,0 +1,485 @@
// SPDX-License-Identifier: GPL-2.0
/**
* pci-j721e - PCIe controller driver for TI's J721E SoCs
*
* Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com
* Author: Kishon Vijay Abraham I <kishon@ti.com>
*/
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/io.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/mfd/syscon.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/pci.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include "../../pci.h"
#include "pcie-cadence.h"
#define ENABLE_REG_SYS_2 0x108
#define STATUS_REG_SYS_2 0x508
#define STATUS_CLR_REG_SYS_2 0x708
#define LINK_DOWN BIT(1)
#define J721E_PCIE_USER_CMD_STATUS 0x4
#define LINK_TRAINING_ENABLE BIT(0)
#define J721E_PCIE_USER_LINKSTATUS 0x14
#define LINK_STATUS GENMASK(1, 0)
enum link_status {
NO_RECEIVERS_DETECTED,
LINK_TRAINING_IN_PROGRESS,
LINK_UP_DL_IN_PROGRESS,
LINK_UP_DL_COMPLETED,
};
#define J721E_MODE_RC BIT(7)
#define LANE_COUNT_MASK BIT(8)
#define LANE_COUNT(n) ((n) << 8)
#define GENERATION_SEL_MASK GENMASK(1, 0)
#define MAX_LANES 2
struct j721e_pcie {
struct device *dev;
u32 mode;
u32 num_lanes;
struct cdns_pcie *cdns_pcie;
void __iomem *user_cfg_base;
void __iomem *intd_cfg_base;
};
enum j721e_pcie_mode {
PCI_MODE_RC,
PCI_MODE_EP,
};
struct j721e_pcie_data {
enum j721e_pcie_mode mode;
};
static inline u32 j721e_pcie_user_readl(struct j721e_pcie *pcie, u32 offset)
{
return readl(pcie->user_cfg_base + offset);
}
static inline void j721e_pcie_user_writel(struct j721e_pcie *pcie, u32 offset,
u32 value)
{
writel(value, pcie->user_cfg_base + offset);
}
static inline u32 j721e_pcie_intd_readl(struct j721e_pcie *pcie, u32 offset)
{
return readl(pcie->intd_cfg_base + offset);
}
static inline void j721e_pcie_intd_writel(struct j721e_pcie *pcie, u32 offset,
u32 value)
{
writel(value, pcie->intd_cfg_base + offset);
}
static irqreturn_t j721e_pcie_link_irq_handler(int irq, void *priv)
{
struct j721e_pcie *pcie = priv;
struct device *dev = pcie->dev;
u32 reg;
reg = j721e_pcie_intd_readl(pcie, STATUS_REG_SYS_2);
if (!(reg & LINK_DOWN))
return IRQ_NONE;
dev_err(dev, "LINK DOWN!\n");
j721e_pcie_intd_writel(pcie, STATUS_CLR_REG_SYS_2, LINK_DOWN);
return IRQ_HANDLED;
}
static void j721e_pcie_config_link_irq(struct j721e_pcie *pcie)
{
u32 reg;
reg = j721e_pcie_intd_readl(pcie, ENABLE_REG_SYS_2);
reg |= LINK_DOWN;
j721e_pcie_intd_writel(pcie, ENABLE_REG_SYS_2, reg);
}
static int j721e_pcie_start_link(struct cdns_pcie *cdns_pcie)
{
struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev);
u32 reg;
reg = j721e_pcie_user_readl(pcie, J721E_PCIE_USER_CMD_STATUS);
reg |= LINK_TRAINING_ENABLE;
j721e_pcie_user_writel(pcie, J721E_PCIE_USER_CMD_STATUS, reg);
return 0;
}
static void j721e_pcie_stop_link(struct cdns_pcie *cdns_pcie)
{
struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev);
u32 reg;
reg = j721e_pcie_user_readl(pcie, J721E_PCIE_USER_CMD_STATUS);
reg &= ~LINK_TRAINING_ENABLE;
j721e_pcie_user_writel(pcie, J721E_PCIE_USER_CMD_STATUS, reg);
}
static bool j721e_pcie_link_up(struct cdns_pcie *cdns_pcie)
{
struct j721e_pcie *pcie = dev_get_drvdata(cdns_pcie->dev);
u32 reg;
reg = j721e_pcie_user_readl(pcie, J721E_PCIE_USER_LINKSTATUS);
reg &= LINK_STATUS;
if (reg == LINK_UP_DL_COMPLETED)
return true;
return false;
}
static const struct cdns_pcie_ops j721e_pcie_ops = {
.start_link = j721e_pcie_start_link,
.stop_link = j721e_pcie_stop_link,
.link_up = j721e_pcie_link_up,
};
static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon)
{
struct device *dev = pcie->dev;
u32 mask = J721E_MODE_RC;
u32 mode = pcie->mode;
u32 val = 0;
int ret = 0;
if (mode == PCI_MODE_RC)
val = J721E_MODE_RC;
ret = regmap_update_bits(syscon, 0, mask, val);
if (ret)
dev_err(dev, "failed to set pcie mode\n");
return ret;
}
static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie,
struct regmap *syscon)
{
struct device *dev = pcie->dev;
struct device_node *np = dev->of_node;
int link_speed;
u32 val = 0;
int ret;
link_speed = of_pci_get_max_link_speed(np);
if (link_speed < 2)
link_speed = 2;
val = link_speed - 1;
ret = regmap_update_bits(syscon, 0, GENERATION_SEL_MASK, val);
if (ret)
dev_err(dev, "failed to set link speed\n");
return ret;
}
static int j721e_pcie_set_lane_count(struct j721e_pcie *pcie,
struct regmap *syscon)
{
struct device *dev = pcie->dev;
u32 lanes = pcie->num_lanes;
u32 val = 0;
int ret;
val = LANE_COUNT(lanes - 1);
ret = regmap_update_bits(syscon, 0, LANE_COUNT_MASK, val);
if (ret)
dev_err(dev, "failed to set link count\n");
return ret;
}
static int j721e_pcie_ctrl_init(struct j721e_pcie *pcie)
{
struct device *dev = pcie->dev;
struct device_node *node = dev->of_node;
struct regmap *syscon;
int ret;
syscon = syscon_regmap_lookup_by_phandle(node, "ti,syscon-pcie-ctrl");
if (IS_ERR(syscon)) {
dev_err(dev, "Unable to get ti,syscon-pcie-ctrl regmap\n");
return PTR_ERR(syscon);
}
ret = j721e_pcie_set_mode(pcie, syscon);
if (ret < 0) {
dev_err(dev, "Failed to set pci mode\n");
return ret;
}
ret = j721e_pcie_set_link_speed(pcie, syscon);
if (ret < 0) {
dev_err(dev, "Failed to set link speed\n");
return ret;
}
ret = j721e_pcie_set_lane_count(pcie, syscon);
if (ret < 0) {
dev_err(dev, "Failed to set num-lanes\n");
return ret;
}
return 0;
}
static int cdns_ti_pcie_config_read(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *value)
{
if (pci_is_root_bus(bus))
return pci_generic_config_read32(bus, devfn, where, size,
value);
return pci_generic_config_read(bus, devfn, where, size, value);
}
static int cdns_ti_pcie_config_write(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 value)
{
if (pci_is_root_bus(bus))
return pci_generic_config_write32(bus, devfn, where, size,
value);
return pci_generic_config_write(bus, devfn, where, size, value);
}
static struct pci_ops cdns_ti_pcie_host_ops = {
.map_bus = cdns_pci_map_bus,
.read = cdns_ti_pcie_config_read,
.write = cdns_ti_pcie_config_write,
};
static const struct j721e_pcie_data j721e_pcie_rc_data = {
.mode = PCI_MODE_RC,
};
static const struct j721e_pcie_data j721e_pcie_ep_data = {
.mode = PCI_MODE_EP,
};
static const struct of_device_id of_j721e_pcie_match[] = {
{
.compatible = "ti,j721e-pcie-host",
.data = &j721e_pcie_rc_data,
},
{
.compatible = "ti,j721e-pcie-ep",
.data = &j721e_pcie_ep_data,
},
{},
};
static int j721e_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct pci_host_bridge *bridge;
struct j721e_pcie_data *data;
struct cdns_pcie *cdns_pcie;
struct j721e_pcie *pcie;
struct cdns_pcie_rc *rc;
struct cdns_pcie_ep *ep;
struct gpio_desc *gpiod;
void __iomem *base;
u32 num_lanes;
u32 mode;
int ret;
int irq;
data = (struct j721e_pcie_data *)of_device_get_match_data(dev);
if (!data)
return -EINVAL;
mode = (u32)data->mode;
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
return -ENOMEM;
pcie->dev = dev;
pcie->mode = mode;
base = devm_platform_ioremap_resource_byname(pdev, "intd_cfg");
if (IS_ERR(base))
return PTR_ERR(base);
pcie->intd_cfg_base = base;
base = devm_platform_ioremap_resource_byname(pdev, "user_cfg");
if (IS_ERR(base))
return PTR_ERR(base);
pcie->user_cfg_base = base;
ret = of_property_read_u32(node, "num-lanes", &num_lanes);
if (ret || num_lanes > MAX_LANES)
num_lanes = 1;
pcie->num_lanes = num_lanes;
if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48)))
return -EINVAL;
irq = platform_get_irq_byname(pdev, "link_state");
if (irq < 0)
return irq;
dev_set_drvdata(dev, pcie);
pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
dev_err(dev, "pm_runtime_get_sync failed\n");
goto err_get_sync;
}
ret = j721e_pcie_ctrl_init(pcie);
if (ret < 0) {
dev_err(dev, "pm_runtime_get_sync failed\n");
goto err_get_sync;
}
ret = devm_request_irq(dev, irq, j721e_pcie_link_irq_handler, 0,
"j721e-pcie-link-down-irq", pcie);
if (ret < 0) {
dev_err(dev, "failed to request link state IRQ %d\n", irq);
goto err_get_sync;
}
j721e_pcie_config_link_irq(pcie);
switch (mode) {
case PCI_MODE_RC:
if (!IS_ENABLED(CONFIG_PCIE_CADENCE_HOST)) {
ret = -ENODEV;
goto err_get_sync;
}
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*rc));
if (!bridge) {
ret = -ENOMEM;
goto err_get_sync;
}
bridge->ops = &cdns_ti_pcie_host_ops;
rc = pci_host_bridge_priv(bridge);
cdns_pcie = &rc->pcie;
cdns_pcie->dev = dev;
cdns_pcie->ops = &j721e_pcie_ops;
pcie->cdns_pcie = cdns_pcie;
gpiod = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(gpiod)) {
ret = PTR_ERR(gpiod);
if (ret != -EPROBE_DEFER)
dev_err(dev, "Failed to get reset GPIO\n");
goto err_get_sync;
}
ret = cdns_pcie_init_phy(dev, cdns_pcie);
if (ret) {
dev_err(dev, "Failed to init phy\n");
goto err_get_sync;
}
/*
* "Power Sequencing and Reset Signal Timings" table in
* PCI EXPRESS CARD ELECTROMECHANICAL SPECIFICATION, REV. 3.0
* indicates PERST# should be deasserted after minimum of 100us
* once REFCLK is stable. The REFCLK to the connector in RC
* mode is selected while enabling the PHY. So deassert PERST#
* after 100 us.
*/
if (gpiod) {
usleep_range(100, 200);
gpiod_set_value_cansleep(gpiod, 1);
}
ret = cdns_pcie_host_setup(rc);
if (ret < 0)
goto err_pcie_setup;
break;
case PCI_MODE_EP:
if (!IS_ENABLED(CONFIG_PCIE_CADENCE_EP)) {
ret = -ENODEV;
goto err_get_sync;
}
ep = devm_kzalloc(dev, sizeof(*ep), GFP_KERNEL);
if (!ep) {
ret = -ENOMEM;
goto err_get_sync;
}
cdns_pcie = &ep->pcie;
cdns_pcie->dev = dev;
cdns_pcie->ops = &j721e_pcie_ops;
pcie->cdns_pcie = cdns_pcie;
ret = cdns_pcie_init_phy(dev, cdns_pcie);
if (ret) {
dev_err(dev, "Failed to init phy\n");
goto err_get_sync;
}
ret = cdns_pcie_ep_setup(ep);
if (ret < 0)
goto err_pcie_setup;
break;
default:
dev_err(dev, "INVALID device type %d\n", mode);
}
return 0;
err_pcie_setup:
cdns_pcie_disable_phy(cdns_pcie);
err_get_sync:
pm_runtime_put(dev);
pm_runtime_disable(dev);
return ret;
}
static int j721e_pcie_remove(struct platform_device *pdev)
{
struct j721e_pcie *pcie = platform_get_drvdata(pdev);
struct cdns_pcie *cdns_pcie = pcie->cdns_pcie;
struct device *dev = &pdev->dev;
cdns_pcie_disable_phy(cdns_pcie);
pm_runtime_put(dev);
pm_runtime_disable(dev);
return 0;
}
static struct platform_driver j721e_pcie_driver = {
.probe = j721e_pcie_probe,
.remove = j721e_pcie_remove,
.driver = {
.name = "j721e-pcie",
.of_match_table = of_j721e_pcie_match,
.suppress_bind_attrs = true,
},
};
builtin_platform_driver(j721e_pcie_driver);

137
drivers/pci/controller/cadence/pcie-cadence-ep.c
View File

@ -8,7 +8,6 @@
#include <linux/of.h>
#include <linux/pci-epc.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/sizes.h>
#include "pcie-cadence.h"
@ -52,6 +51,7 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
struct pci_epf_bar *epf_bar)
{
struct cdns_pcie_ep *ep = epc_get_drvdata(epc);
struct cdns_pcie_epf *epf = &ep->epf[fn];
struct cdns_pcie *pcie = &ep->pcie;
dma_addr_t bar_phys = epf_bar->phys_addr;
enum pci_barno bar = epf_bar->barno;
@ -112,6 +112,8 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_CTRL(b, ctrl));
cdns_pcie_writel(pcie, reg, cfg);
epf->epf_bar[bar] = epf_bar;
return 0;
}
@ -119,6 +121,7 @@ static void cdns_pcie_ep_clear_bar(struct pci_epc *epc, u8 fn,
struct pci_epf_bar *epf_bar)
{
struct cdns_pcie_ep *ep = epc_get_drvdata(epc);
struct cdns_pcie_epf *epf = &ep->epf[fn];
struct cdns_pcie *pcie = &ep->pcie;
enum pci_barno bar = epf_bar->barno;
u32 reg, cfg, b, ctrl;
@ -140,6 +143,8 @@ static void cdns_pcie_ep_clear_bar(struct pci_epc *epc, u8 fn,
cdns_pcie_writel(pcie, CDNS_PCIE_AT_IB_EP_FUNC_BAR_ADDR0(fn, bar), 0);
cdns_pcie_writel(pcie, CDNS_PCIE_AT_IB_EP_FUNC_BAR_ADDR1(fn, bar), 0);
epf->epf_bar[bar] = NULL;
}
static int cdns_pcie_ep_map_addr(struct pci_epc *epc, u8 fn, phys_addr_t addr,
@ -156,7 +161,7 @@ static int cdns_pcie_ep_map_addr(struct pci_epc *epc, u8 fn, phys_addr_t addr,
return -EINVAL;
}
cdns_pcie_set_outbound_region(pcie, fn, r, false, addr, pci_addr, size);
cdns_pcie_set_outbound_region(pcie, 0, fn, r, false, addr, pci_addr, size);
set_bit(r, &ep->ob_region_map);
ep->ob_addr[r] = addr;
@ -225,10 +230,55 @@ static int cdns_pcie_ep_get_msi(struct pci_epc *epc, u8 fn)
return mme;
}
static int cdns_pcie_ep_get_msix(struct pci_epc *epc, u8 func_no)
{
struct cdns_pcie_ep *ep = epc_get_drvdata(epc);
struct cdns_pcie *pcie = &ep->pcie;
u32 cap = CDNS_PCIE_EP_FUNC_MSIX_CAP_OFFSET;
u32 val, reg;
reg = cap + PCI_MSIX_FLAGS;
val = cdns_pcie_ep_fn_readw(pcie, func_no, reg);
if (!(val & PCI_MSIX_FLAGS_ENABLE))
return -EINVAL;
val &= PCI_MSIX_FLAGS_QSIZE;
return val;
}
static int cdns_pcie_ep_set_msix(struct pci_epc *epc, u8 fn, u16 interrupts,
enum pci_barno bir, u32 offset)
{
struct cdns_pcie_ep *ep = epc_get_drvdata(epc);
struct cdns_pcie *pcie = &ep->pcie;
u32 cap = CDNS_PCIE_EP_FUNC_MSIX_CAP_OFFSET;
u32 val, reg;
reg = cap + PCI_MSIX_FLAGS;
val = cdns_pcie_ep_fn_readw(pcie, fn, reg);
val &= ~PCI_MSIX_FLAGS_QSIZE;
val |= interrupts;
cdns_pcie_ep_fn_writew(pcie, fn, reg, val);
/* Set MSIX BAR and offset */
reg = cap + PCI_MSIX_TABLE;
val = offset | bir;
cdns_pcie_ep_fn_writel(pcie, fn, reg, val);
/* Set PBA BAR and offset. BAR must match MSIX BAR */
reg = cap + PCI_MSIX_PBA;
val = (offset + (interrupts * PCI_MSIX_ENTRY_SIZE)) | bir;
cdns_pcie_ep_fn_writel(pcie, fn, reg, val);
return 0;
}
static void cdns_pcie_ep_assert_intx(struct cdns_pcie_ep *ep, u8 fn,
u8 intx, bool is_asserted)
{
struct cdns_pcie *pcie = &ep->pcie;
unsigned long flags;
u32 offset;
u16 status;
u8 msg_code;
@ -239,7 +289,7 @@ static void cdns_pcie_ep_assert_intx(struct cdns_pcie_ep *ep, u8 fn,
if (unlikely(ep->irq_pci_addr != CDNS_PCIE_EP_IRQ_PCI_ADDR_LEGACY ||
ep->irq_pci_fn != fn)) {
/* First region was reserved for IRQ writes. */
cdns_pcie_set_outbound_region_for_normal_msg(pcie, fn, 0,
cdns_pcie_set_outbound_region_for_normal_msg(pcie, 0, fn, 0,
ep->irq_phys_addr);
ep->irq_pci_addr = CDNS_PCIE_EP_IRQ_PCI_ADDR_LEGACY;
ep->irq_pci_fn = fn;
@ -253,11 +303,13 @@ static void cdns_pcie_ep_assert_intx(struct cdns_pcie_ep *ep, u8 fn,
msg_code = MSG_CODE_DEASSERT_INTA + intx;
}
spin_lock_irqsave(&ep->lock, flags);
status = cdns_pcie_ep_fn_readw(pcie, fn, PCI_STATUS);
if (((status & PCI_STATUS_INTERRUPT) != 0) ^ (ep->irq_pending != 0)) {
status ^= PCI_STATUS_INTERRUPT;
cdns_pcie_ep_fn_writew(pcie, fn, PCI_STATUS, status);
}
spin_unlock_irqrestore(&ep->lock, flags);
offset = CDNS_PCIE_NORMAL_MSG_ROUTING(MSG_ROUTING_LOCAL) |
CDNS_PCIE_NORMAL_MSG_CODE(msg_code) |
@ -318,7 +370,7 @@ static int cdns_pcie_ep_send_msi_irq(struct cdns_pcie_ep *ep, u8 fn,
if (unlikely(ep->irq_pci_addr != (pci_addr & ~pci_addr_mask) ||
ep->irq_pci_fn != fn)) {
/* First region was reserved for IRQ writes. */
cdns_pcie_set_outbound_region(pcie, fn, 0,
cdns_pcie_set_outbound_region(pcie, 0, fn, 0,
false,
ep->irq_phys_addr,
pci_addr & ~pci_addr_mask,
@ -331,6 +383,51 @@ static int cdns_pcie_ep_send_msi_irq(struct cdns_pcie_ep *ep, u8 fn,
return 0;
}
static int cdns_pcie_ep_send_msix_irq(struct cdns_pcie_ep *ep, u8 fn,
u16 interrupt_num)
{
u32 cap = CDNS_PCIE_EP_FUNC_MSIX_CAP_OFFSET;
u32 tbl_offset, msg_data, reg;
struct cdns_pcie *pcie = &ep->pcie;
struct pci_epf_msix_tbl *msix_tbl;
struct cdns_pcie_epf *epf;
u64 pci_addr_mask = 0xff;
u64 msg_addr;
u16 flags;
u8 bir;
/* Check whether the MSI-X feature has been enabled by the PCI host. */
flags = cdns_pcie_ep_fn_readw(pcie, fn, cap + PCI_MSIX_FLAGS);
if (!(flags & PCI_MSIX_FLAGS_ENABLE))
return -EINVAL;
reg = cap + PCI_MSIX_TABLE;
tbl_offset = cdns_pcie_ep_fn_readl(pcie, fn, reg);
bir = tbl_offset & PCI_MSIX_TABLE_BIR;
tbl_offset &= PCI_MSIX_TABLE_OFFSET;
epf = &ep->epf[fn];
msix_tbl = epf->epf_bar[bir]->addr + tbl_offset;
msg_addr = msix_tbl[(interrupt_num - 1)].msg_addr;
msg_data = msix_tbl[(interrupt_num - 1)].msg_data;
/* Set the outbound region if needed. */
if (ep->irq_pci_addr != (msg_addr & ~pci_addr_mask) ||
ep->irq_pci_fn != fn) {
/* First region was reserved for IRQ writes. */
cdns_pcie_set_outbound_region(pcie, 0, fn, 0,
false,
ep->irq_phys_addr,
msg_addr & ~pci_addr_mask,
pci_addr_mask + 1);
ep->irq_pci_addr = (msg_addr & ~pci_addr_mask);
ep->irq_pci_fn = fn;
}
writel(msg_data, ep->irq_cpu_addr + (msg_addr & pci_addr_mask));
return 0;
}
static int cdns_pcie_ep_raise_irq(struct pci_epc *epc, u8 fn,
enum pci_epc_irq_type type,
u16 interrupt_num)
@ -344,6 +441,9 @@ static int cdns_pcie_ep_raise_irq(struct pci_epc *epc, u8 fn,
case PCI_EPC_IRQ_MSI:
return cdns_pcie_ep_send_msi_irq(ep, fn, interrupt_num);
case PCI_EPC_IRQ_MSIX:
return cdns_pcie_ep_send_msix_irq(ep, fn, interrupt_num);
default:
break;
}
@ -355,8 +455,10 @@ static int cdns_pcie_ep_start(struct pci_epc *epc)
{
struct cdns_pcie_ep *ep = epc_get_drvdata(epc);
struct cdns_pcie *pcie = &ep->pcie;
struct device *dev = pcie->dev;
struct pci_epf *epf;
u32 cfg;
int ret;
/*
* BIT(0) is hardwired to 1, hence function 0 is always enabled
@ -367,13 +469,19 @@ static int cdns_pcie_ep_start(struct pci_epc *epc)
cfg |= BIT(epf->func_no);
cdns_pcie_writel(pcie, CDNS_PCIE_LM_EP_FUNC_CFG, cfg);
ret = cdns_pcie_start_link(pcie);
if (ret) {
dev_err(dev, "Failed to start link\n");
return ret;
}
return 0;
}
static const struct pci_epc_features cdns_pcie_epc_features = {
.linkup_notifier = false,
.msi_capable = true,
.msix_capable = false,
.msix_capable = true,
};
static const struct pci_epc_features*
@ -390,6 +498,8 @@ static const struct pci_epc_ops cdns_pcie_epc_ops = {
.unmap_addr = cdns_pcie_ep_unmap_addr,
.set_msi = cdns_pcie_ep_set_msi,
.get_msi = cdns_pcie_ep_get_msi,
.set_msix = cdns_pcie_ep_set_msix,
.get_msix = cdns_pcie_ep_get_msix,
.raise_irq = cdns_pcie_ep_raise_irq,
.start = cdns_pcie_ep_start,
.get_features = cdns_pcie_ep_get_features,
@ -408,8 +518,7 @@ int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep)
pcie->is_rc = false;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "reg");
pcie->reg_base = devm_ioremap_resource(dev, res);
pcie->reg_base = devm_platform_ioremap_resource_byname(pdev, "reg");
if (IS_ERR(pcie->reg_base)) {
dev_err(dev, "missing \"reg\"\n");
return PTR_ERR(pcie->reg_base);
@ -440,8 +549,7 @@ int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep)
epc = devm_pci_epc_create(dev, &cdns_pcie_epc_ops);
if (IS_ERR(epc)) {
dev_err(dev, "failed to create epc device\n");
ret = PTR_ERR(epc);
goto err_init;
return PTR_ERR(epc);
}
epc_set_drvdata(epc, ep);
@ -449,11 +557,16 @@ int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep)
if (of_property_read_u8(np, "max-functions", &epc->max_functions) < 0)
epc->max_functions = 1;
ep->epf = devm_kcalloc(dev, epc->max_functions, sizeof(*ep->epf),
GFP_KERNEL);
if (!ep->epf)
return -ENOMEM;
ret = pci_epc_mem_init(epc, pcie->mem_res->start,
resource_size(pcie->mem_res), PAGE_SIZE);
if (ret < 0) {
dev_err(dev, "failed to initialize the memory space\n");
goto err_init;
return ret;
}
ep->irq_cpu_addr = pci_epc_mem_alloc_addr(epc, &ep->irq_phys_addr,
@ -466,14 +579,12 @@ int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep)
ep->irq_pci_addr = CDNS_PCIE_EP_IRQ_PCI_ADDR_NONE;
/* Reserve region 0 for IRQs */
set_bit(0, &ep->ob_region_map);
spin_lock_init(&ep->lock);
return 0;
free_epc_mem:
pci_epc_mem_exit(epc);
err_init:
pm_runtime_put_sync(dev);
return ret;
}

387
drivers/pci/controller/cadence/pcie-cadence-host.c
View File

@ -3,16 +3,28 @@
// Cadence PCIe host controller driver.
// Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/list_sort.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include "pcie-cadence.h"
static void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
int where)
static u64 bar_max_size[] = {
[RP_BAR0] = _ULL(128 * SZ_2G),
[RP_BAR1] = SZ_2G,
[RP_NO_BAR] = _BITULL(63),
};
static u8 bar_aperture_mask[] = {
[RP_BAR0] = 0x1F,
[RP_BAR1] = 0xF,
};
void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
int where)
{
struct pci_host_bridge *bridge = pci_find_host_bridge(bus);
struct cdns_pcie_rc *rc = pci_host_bridge_priv(bridge);
@ -20,7 +32,7 @@ static void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
unsigned int busn = bus->number;
u32 addr0, desc0;
if (busn == rc->bus_range->start) {
if (pci_is_root_bus(bus)) {
/*
* Only the root port (devfn == 0) is connected to this bus.
* All other PCI devices are behind some bridge hence on another
@ -50,7 +62,7 @@ static void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
* The bus number was already set once for all in desc1 by
* cdns_pcie_host_init_address_translation().
*/
if (busn == rc->bus_range->start + 1)
if (busn == bridge->busnr + 1)
desc0 |= CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_CONF_TYPE0;
else
desc0 |= CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_CONF_TYPE1;
@ -70,6 +82,7 @@ static int cdns_pcie_host_init_root_port(struct cdns_pcie_rc *rc)
{
struct cdns_pcie *pcie = &rc->pcie;
u32 value, ctrl;
u32 id;
/*
* Set the root complex BAR configuration register:
@ -89,8 +102,12 @@ static int cdns_pcie_host_init_root_port(struct cdns_pcie_rc *rc)
cdns_pcie_writel(pcie, CDNS_PCIE_LM_RC_BAR_CFG, value);
/* Set root port configuration space */
if (rc->vendor_id != 0xffff)
cdns_pcie_rp_writew(pcie, PCI_VENDOR_ID, rc->vendor_id);
if (rc->vendor_id != 0xffff) {
id = CDNS_PCIE_LM_ID_VENDOR(rc->vendor_id) |
CDNS_PCIE_LM_ID_SUBSYS(rc->vendor_id);
cdns_pcie_writel(pcie, CDNS_PCIE_LM_ID, id);
}
if (rc->device_id != 0xffff)
cdns_pcie_rp_writew(pcie, PCI_DEVICE_ID, rc->device_id);
@ -101,19 +118,230 @@ static int cdns_pcie_host_init_root_port(struct cdns_pcie_rc *rc)
return 0;
}
static int cdns_pcie_host_bar_ib_config(struct cdns_pcie_rc *rc,
enum cdns_pcie_rp_bar bar,
u64 cpu_addr, u64 size,
unsigned long flags)
{
struct cdns_pcie *pcie = &rc->pcie;
u32 addr0, addr1, aperture, value;
if (!rc->avail_ib_bar[bar])
return -EBUSY;
rc->avail_ib_bar[bar] = false;
aperture = ilog2(size);
addr0 = CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS(aperture) |
(lower_32_bits(cpu_addr) & GENMASK(31, 8));
addr1 = upper_32_bits(cpu_addr);
cdns_pcie_writel(pcie, CDNS_PCIE_AT_IB_RP_BAR_ADDR0(bar), addr0);
cdns_pcie_writel(pcie, CDNS_PCIE_AT_IB_RP_BAR_ADDR1(bar), addr1);
if (bar == RP_NO_BAR)
return 0;
value = cdns_pcie_readl(pcie, CDNS_PCIE_LM_RC_BAR_CFG);
value &= ~(LM_RC_BAR_CFG_CTRL_MEM_64BITS(bar) |
LM_RC_BAR_CFG_CTRL_PREF_MEM_64BITS(bar) |
LM_RC_BAR_CFG_CTRL_MEM_32BITS(bar) |
LM_RC_BAR_CFG_CTRL_PREF_MEM_32BITS(bar) |
LM_RC_BAR_CFG_APERTURE(bar, bar_aperture_mask[bar] + 2));
if (size + cpu_addr >= SZ_4G) {
if (!(flags & IORESOURCE_PREFETCH))
value |= LM_RC_BAR_CFG_CTRL_MEM_64BITS(bar);
value |= LM_RC_BAR_CFG_CTRL_PREF_MEM_64BITS(bar);
} else {
if (!(flags & IORESOURCE_PREFETCH))
value |= LM_RC_BAR_CFG_CTRL_MEM_32BITS(bar);
value |= LM_RC_BAR_CFG_CTRL_PREF_MEM_32BITS(bar);
}
value |= LM_RC_BAR_CFG_APERTURE(bar, aperture);
cdns_pcie_writel(pcie, CDNS_PCIE_LM_RC_BAR_CFG, value);
return 0;
}
static enum cdns_pcie_rp_bar
cdns_pcie_host_find_min_bar(struct cdns_pcie_rc *rc, u64 size)
{
enum cdns_pcie_rp_bar bar, sel_bar;
sel_bar = RP_BAR_UNDEFINED;
for (bar = RP_BAR0; bar <= RP_NO_BAR; bar++) {
if (!rc->avail_ib_bar[bar])
continue;
if (size <= bar_max_size[bar]) {
if (sel_bar == RP_BAR_UNDEFINED) {
sel_bar = bar;
continue;
}
if (bar_max_size[bar] < bar_max_size[sel_bar])
sel_bar = bar;
}
}
return sel_bar;
}
static enum cdns_pcie_rp_bar
cdns_pcie_host_find_max_bar(struct cdns_pcie_rc *rc, u64 size)
{
enum cdns_pcie_rp_bar bar, sel_bar;
sel_bar = RP_BAR_UNDEFINED;
for (bar = RP_BAR0; bar <= RP_NO_BAR; bar++) {
if (!rc->avail_ib_bar[bar])
continue;
if (size >= bar_max_size[bar]) {
if (sel_bar == RP_BAR_UNDEFINED) {
sel_bar = bar;
continue;
}
if (bar_max_size[bar] > bar_max_size[sel_bar])
sel_bar = bar;
}
}
return sel_bar;
}
static int cdns_pcie_host_bar_config(struct cdns_pcie_rc *rc,
struct resource_entry *entry)
{
u64 cpu_addr, pci_addr, size, winsize;
struct cdns_pcie *pcie = &rc->pcie;
struct device *dev = pcie->dev;
enum cdns_pcie_rp_bar bar;
unsigned long flags;
int ret;
cpu_addr = entry->res->start;
pci_addr = entry->res->start - entry->offset;
flags = entry->res->flags;
size = resource_size(entry->res);
if (entry->offset) {
dev_err(dev, "PCI addr: %llx must be equal to CPU addr: %llx\n",
pci_addr, cpu_addr);
return -EINVAL;
}
while (size > 0) {
/*
* Try to find a minimum BAR whose size is greater than
* or equal to the remaining resource_entry size. This will
* fail if the size of each of the available BARs is less than
* the remaining resource_entry size.
* If a minimum BAR is found, IB ATU will be configured and
* exited.
*/
bar = cdns_pcie_host_find_min_bar(rc, size);
if (bar != RP_BAR_UNDEFINED) {
ret = cdns_pcie_host_bar_ib_config(rc, bar, cpu_addr,
size, flags);
if (ret)
dev_err(dev, "IB BAR: %d config failed\n", bar);
return ret;
}
/*
* If the control reaches here, it would mean the remaining
* resource_entry size cannot be fitted in a single BAR. So we
* find a maximum BAR whose size is less than or equal to the
* remaining resource_entry size and split the resource entry
* so that part of resource entry is fitted inside the maximum
* BAR. The remaining size would be fitted during the next
* iteration of the loop.
* If a maximum BAR is not found, there is no way we can fit
* this resource_entry, so we error out.
*/
bar = cdns_pcie_host_find_max_bar(rc, size);
if (bar == RP_BAR_UNDEFINED) {
dev_err(dev, "No free BAR to map cpu_addr %llx\n",
cpu_addr);
return -EINVAL;
}
winsize = bar_max_size[bar];
ret = cdns_pcie_host_bar_ib_config(rc, bar, cpu_addr, winsize,
flags);
if (ret) {
dev_err(dev, "IB BAR: %d config failed\n", bar);
return ret;
}
size -= winsize;
cpu_addr += winsize;
}
return 0;
}
static int cdns_pcie_host_dma_ranges_cmp(void *priv, struct list_head *a, struct list_head *b)
{
struct resource_entry *entry1, *entry2;
entry1 = container_of(a, struct resource_entry, node);
entry2 = container_of(b, struct resource_entry, node);
return resource_size(entry2->res) - resource_size(entry1->res);
}
static int cdns_pcie_host_map_dma_ranges(struct cdns_pcie_rc *rc)
{
struct cdns_pcie *pcie = &rc->pcie;
struct device *dev = pcie->dev;
struct device_node *np = dev->of_node;
struct pci_host_bridge *bridge;
struct resource_entry *entry;
u32 no_bar_nbits = 32;
int err;
bridge = pci_host_bridge_from_priv(rc);
if (!bridge)
return -ENOMEM;
if (list_empty(&bridge->dma_ranges)) {
of_property_read_u32(np, "cdns,no-bar-match-nbits",
&no_bar_nbits);
err = cdns_pcie_host_bar_ib_config(rc, RP_NO_BAR, 0x0,
(u64)1 << no_bar_nbits, 0);
if (err)
dev_err(dev, "IB BAR: %d config failed\n", RP_NO_BAR);
return err;
}
list_sort(NULL, &bridge->dma_ranges, cdns_pcie_host_dma_ranges_cmp);
resource_list_for_each_entry(entry, &bridge->dma_ranges) {
err = cdns_pcie_host_bar_config(rc, entry);
if (err)
dev_err(dev, "Fail to configure IB using dma-ranges\n");
return err;
}
return 0;
}
static int cdns_pcie_host_init_address_translation(struct cdns_pcie_rc *rc)
{
struct cdns_pcie *pcie = &rc->pcie;
struct resource *mem_res = pcie->mem_res;
struct resource *bus_range = rc->bus_range;
struct pci_host_bridge *bridge = pci_host_bridge_from_priv(rc);
struct resource *cfg_res = rc->cfg_res;
struct device *dev = pcie->dev;
struct device_node *np = dev->of_node;
struct of_pci_range_parser parser;
struct of_pci_range range;
struct resource_entry *entry;
u64 cpu_addr = cfg_res->start;
u32 addr0, addr1, desc1;
u64 cpu_addr;
int r, err;
int r, err, busnr = 0;
entry = resource_list_first_type(&bridge->windows, IORESOURCE_BUS);
if (entry)
busnr = entry->res->start;
/*
* Reserve region 0 for PCI configure space accesses:
@ -121,81 +349,74 @@ static int cdns_pcie_host_init_address_translation(struct cdns_pcie_rc *rc)
* cdns_pci_map_bus(), other region registers are set here once for all.
*/
addr1 = 0; /* Should be programmed to zero. */
desc1 = CDNS_PCIE_AT_OB_REGION_DESC1_BUS(bus_range->start);
desc1 = CDNS_PCIE_AT_OB_REGION_DESC1_BUS(busnr);
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_PCI_ADDR1(0), addr1);
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_DESC1(0), desc1);
cpu_addr = cfg_res->start - mem_res->start;
if (pcie->ops->cpu_addr_fixup)
cpu_addr = pcie->ops->cpu_addr_fixup(pcie, cpu_addr);
addr0 = CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS(12) |
(lower_32_bits(cpu_addr) & GENMASK(31, 8));
addr1 = upper_32_bits(cpu_addr);
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR0(0), addr0);
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(0), addr1);
err = of_pci_range_parser_init(&parser, np);
if (err)
return err;
r = 1;
for_each_of_pci_range(&parser, &range) {
bool is_io;
resource_list_for_each_entry(entry, &bridge->windows) {
struct resource *res = entry->res;
u64 pci_addr = res->start - entry->offset;
if ((range.flags & IORESOURCE_TYPE_BITS) == IORESOURCE_MEM)
is_io = false;
else if ((range.flags & IORESOURCE_TYPE_BITS) == IORESOURCE_IO)
is_io = true;
if (resource_type(res) == IORESOURCE_IO)
cdns_pcie_set_outbound_region(pcie, busnr, 0, r,
true,
pci_pio_to_address(res->start),
pci_addr,
resource_size(res));
else
continue;
cdns_pcie_set_outbound_region(pcie, busnr, 0, r,
false,
res->start,
pci_addr,
resource_size(res));
cdns_pcie_set_outbound_region(pcie, 0, r, is_io,
range.cpu_addr,
range.pci_addr,
range.size);
r++;
}
/*
* Set Root Port no BAR match Inbound Translation registers:
* needed for MSI and DMA.
* Root Port BAR0 and BAR1 are disabled, hence no need to set their
* inbound translation registers.
*/
addr0 = CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS(rc->no_bar_nbits);
addr1 = 0;
cdns_pcie_writel(pcie, CDNS_PCIE_AT_IB_RP_BAR_ADDR0(RP_NO_BAR), addr0);
cdns_pcie_writel(pcie, CDNS_PCIE_AT_IB_RP_BAR_ADDR1(RP_NO_BAR), addr1);
err = cdns_pcie_host_map_dma_ranges(rc);
if (err)
return err;
return 0;
}
static int cdns_pcie_host_init(struct device *dev,
struct list_head *resources,
struct cdns_pcie_rc *rc)
{
struct resource *bus_range = NULL;
int err;
/* Parse our PCI ranges and request their resources */
err = pci_parse_request_of_pci_ranges(dev, resources, NULL, &bus_range);
if (err)
return err;
rc->bus_range = bus_range;
rc->pcie.bus = bus_range->start;
err = cdns_pcie_host_init_root_port(rc);
if (err)
goto err_out;
return err;
err = cdns_pcie_host_init_address_translation(rc);
if (err)
goto err_out;
return cdns_pcie_host_init_address_translation(rc);
}
return 0;
static int cdns_pcie_host_wait_for_link(struct cdns_pcie *pcie)
{
struct device *dev = pcie->dev;
int retries;
err_out:
pci_free_resource_list(resources);
return err;
/* Check if the link is up or not */
for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
if (cdns_pcie_link_up(pcie)) {
dev_info(dev, "Link up\n");
return 0;
}
usleep_range(LINK_WAIT_USLEEP_MIN, LINK_WAIT_USLEEP_MAX);
}
return -ETIMEDOUT;
}
int cdns_pcie_host_setup(struct cdns_pcie_rc *rc)
@ -204,7 +425,7 @@ int cdns_pcie_host_setup(struct cdns_pcie_rc *rc)
struct platform_device *pdev = to_platform_device(dev);
struct device_node *np = dev->of_node;
struct pci_host_bridge *bridge;
struct list_head resources;
enum cdns_pcie_rp_bar bar;
struct cdns_pcie *pcie;
struct resource *res;
int ret;
@ -216,17 +437,13 @@ int cdns_pcie_host_setup(struct cdns_pcie_rc *rc)
pcie = &rc->pcie;
pcie->is_rc = true;
rc->no_bar_nbits = 32;
of_property_read_u32(np, "cdns,no-bar-match-nbits", &rc->no_bar_nbits);
rc->vendor_id = 0xffff;
of_property_read_u32(np, "vendor-id", &rc->vendor_id);
rc->device_id = 0xffff;
of_property_read_u32(np, "device-id", &rc->device_id);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "reg");
pcie->reg_base = devm_ioremap_resource(dev, res);
pcie->reg_base = devm_platform_ioremap_resource_byname(pdev, "reg");
if (IS_ERR(pcie->reg_base)) {
dev_err(dev, "missing \"reg\"\n");
return PTR_ERR(pcie->reg_base);
@ -234,40 +451,36 @@ int cdns_pcie_host_setup(struct cdns_pcie_rc *rc)
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
rc->cfg_base = devm_pci_remap_cfg_resource(dev, res);
if (IS_ERR(rc->cfg_base)) {
dev_err(dev, "missing \"cfg\"\n");
if (IS_ERR(rc->cfg_base))
return PTR_ERR(rc->cfg_base);
}
rc->cfg_res = res;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mem");
if (!res) {
dev_err(dev, "missing \"mem\"\n");
return -EINVAL;
ret = cdns_pcie_start_link(pcie);
if (ret) {
dev_err(dev, "Failed to start link\n");
return ret;
}
pcie->mem_res = res;
ret = cdns_pcie_host_init(dev, &resources, rc);
ret = cdns_pcie_host_wait_for_link(pcie);
if (ret)
goto err_init;
dev_dbg(dev, "PCIe link never came up\n");
list_splice_init(&resources, &bridge->windows);
bridge->dev.parent = dev;
bridge->busnr = pcie->bus;
bridge->ops = &cdns_pcie_host_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
for (bar = RP_BAR0; bar <= RP_NO_BAR; bar++)
rc->avail_ib_bar[bar] = true;
ret = cdns_pcie_host_init(dev, rc);
if (ret)
return ret;
if (!bridge->ops)
bridge->ops = &cdns_pcie_host_ops;
ret = pci_host_probe(bridge);
if (ret < 0)
goto err_host_probe;
goto err_init;
return 0;
err_host_probe:
pci_free_resource_list(&resources);
err_init:
pm_runtime_put_sync(dev);

16
drivers/pci/controller/cadence/pcie-cadence-plat.c
View File

@ -13,6 +13,8 @@
#include <linux/of_device.h>
#include "pcie-cadence.h"
#define CDNS_PLAT_CPU_TO_BUS_ADDR 0x0FFFFFFF
/**
* struct cdns_plat_pcie - private data for this PCIe platform driver
* @pcie: Cadence PCIe controller
@ -30,6 +32,15 @@ struct cdns_plat_pcie_of_data {
static const struct of_device_id cdns_plat_pcie_of_match[];
static u64 cdns_plat_cpu_addr_fixup(struct cdns_pcie *pcie, u64 cpu_addr)
{
return cpu_addr & CDNS_PLAT_CPU_TO_BUS_ADDR;
}
static const struct cdns_pcie_ops cdns_plat_ops = {
.cpu_addr_fixup = cdns_plat_cpu_addr_fixup,
};
static int cdns_plat_pcie_probe(struct platform_device *pdev)
{
const struct cdns_plat_pcie_of_data *data;
@ -66,6 +77,7 @@ static int cdns_plat_pcie_probe(struct platform_device *pdev)
rc = pci_host_bridge_priv(bridge);
rc->pcie.dev = dev;
rc->pcie.ops = &cdns_plat_ops;
cdns_plat_pcie->pcie = &rc->pcie;
cdns_plat_pcie->is_rc = is_rc;
@ -93,6 +105,7 @@ static int cdns_plat_pcie_probe(struct platform_device *pdev)
return -ENOMEM;
ep->pcie.dev = dev;
ep->pcie.ops = &cdns_plat_ops;
cdns_plat_pcie->pcie = &ep->pcie;
cdns_plat_pcie->is_rc = is_rc;
@ -115,9 +128,8 @@ static int cdns_plat_pcie_probe(struct platform_device *pdev)
}
err_init:
pm_runtime_put_sync(dev);
err_get_sync:
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);
cdns_pcie_disable_phy(cdns_plat_pcie->pcie);
phy_count = cdns_plat_pcie->pcie->phy_count;

17
drivers/pci/controller/cadence/pcie-cadence.c
View File

@ -7,7 +7,7 @@
#include "pcie-cadence.h"
void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 fn,
void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 busnr, u8 fn,
u32 r, bool is_io,
u64 cpu_addr, u64 pci_addr, size_t size)
{
@ -60,7 +60,7 @@ void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 fn,
/* The device and function numbers are always 0. */
desc0 |= CDNS_PCIE_AT_OB_REGION_DESC0_HARDCODED_RID |
CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN(0);
desc1 |= CDNS_PCIE_AT_OB_REGION_DESC1_BUS(pcie->bus);
desc1 |= CDNS_PCIE_AT_OB_REGION_DESC1_BUS(busnr);
} else {
/*
* Use captured values for bus and device numbers but still
@ -73,7 +73,9 @@ void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 fn,
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_DESC1(r), desc1);
/* Set the CPU address */
cpu_addr -= pcie->mem_res->start;
if (pcie->ops->cpu_addr_fixup)
cpu_addr = pcie->ops->cpu_addr_fixup(pcie, cpu_addr);
addr0 = CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS(nbits) |
(lower_32_bits(cpu_addr) & GENMASK(31, 8));
addr1 = upper_32_bits(cpu_addr);
@ -82,7 +84,8 @@ void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 fn,
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(r), addr1);
}
void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie, u8 fn,
void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie,
u8 busnr, u8 fn,
u32 r, u64 cpu_addr)
{
u32 addr0, addr1, desc0, desc1;
@ -94,13 +97,15 @@ void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie, u8 fn,
if (pcie->is_rc) {
desc0 |= CDNS_PCIE_AT_OB_REGION_DESC0_HARDCODED_RID |
CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN(0);
desc1 |= CDNS_PCIE_AT_OB_REGION_DESC1_BUS(pcie->bus);
desc1 |= CDNS_PCIE_AT_OB_REGION_DESC1_BUS(busnr);
} else {
desc0 |= CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN(fn);
}
/* Set the CPU address */
cpu_addr -= pcie->mem_res->start;
if (pcie->ops->cpu_addr_fixup)
cpu_addr = pcie->ops->cpu_addr_fixup(pcie, cpu_addr);
addr0 = CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS(17) |
(lower_32_bits(cpu_addr) & GENMASK(31, 8));
addr1 = upper_32_bits(cpu_addr);

173
drivers/pci/controller/cadence/pcie-cadence.h
View File

@ -10,6 +10,11 @@
#include <linux/pci.h>
#include <linux/phy/phy.h>
/* Parameters for the waiting for link up routine */
#define LINK_WAIT_MAX_RETRIES 10
#define LINK_WAIT_USLEEP_MIN 90000
#define LINK_WAIT_USLEEP_MAX 100000
/*
* Local Management Registers
*/
@ -87,6 +92,20 @@
#define CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_64BITS 0x6
#define CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_64BITS 0x7
#define LM_RC_BAR_CFG_CTRL_DISABLED(bar) \
(CDNS_PCIE_LM_BAR_CFG_CTRL_DISABLED << (((bar) * 8) + 6))
#define LM_RC_BAR_CFG_CTRL_IO_32BITS(bar) \
(CDNS_PCIE_LM_BAR_CFG_CTRL_IO_32BITS << (((bar) * 8) + 6))
#define LM_RC_BAR_CFG_CTRL_MEM_32BITS(bar) \
(CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_32BITS << (((bar) * 8) + 6))
#define LM_RC_BAR_CFG_CTRL_PREF_MEM_32BITS(bar) \
(CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_32BITS << (((bar) * 8) + 6))
#define LM_RC_BAR_CFG_CTRL_MEM_64BITS(bar) \
(CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_64BITS << (((bar) * 8) + 6))
#define LM_RC_BAR_CFG_CTRL_PREF_MEM_64BITS(bar) \
(CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_64BITS << (((bar) * 8) + 6))
#define LM_RC_BAR_CFG_APERTURE(bar, aperture) \
(((aperture) - 2) << ((bar) * 8))
/*
* Endpoint Function Registers (PCI configuration space for endpoint functions)
@ -94,6 +113,7 @@
#define CDNS_PCIE_EP_FUNC_BASE(fn) (((fn) << 12) & GENMASK(19, 12))
#define CDNS_PCIE_EP_FUNC_MSI_CAP_OFFSET 0x90
#define CDNS_PCIE_EP_FUNC_MSIX_CAP_OFFSET 0xb0
/*
* Root Port Registers (PCI configuration space for the root port function)
@ -170,11 +190,19 @@
#define CDNS_PCIE_AT_LINKDOWN (CDNS_PCIE_AT_BASE + 0x0824)
enum cdns_pcie_rp_bar {
RP_BAR_UNDEFINED = -1,
RP_BAR0,
RP_BAR1,
RP_NO_BAR
};
#define CDNS_PCIE_RP_MAX_IB 0x3
struct cdns_pcie_rp_ib_bar {
u64 size;
bool free;
};
/* Endpoint Function BAR Inbound PCIe to AXI Address Translation Register */
#define CDNS_PCIE_AT_IB_EP_FUNC_BAR_ADDR0(fn, bar) \
(CDNS_PCIE_AT_BASE + 0x0840 + (fn) * 0x0040 + (bar) * 0x0008)
@ -223,23 +251,31 @@ enum cdns_pcie_msg_routing {
MSG_ROUTING_GATHER,
};
struct cdns_pcie_ops {
int (*start_link)(struct cdns_pcie *pcie);
void (*stop_link)(struct cdns_pcie *pcie);
bool (*link_up)(struct cdns_pcie *pcie);
u64 (*cpu_addr_fixup)(struct cdns_pcie *pcie, u64 cpu_addr);
};
/**
* struct cdns_pcie - private data for Cadence PCIe controller drivers
* @reg_base: IO mapped register base
* @mem_res: start/end offsets in the physical system memory to map PCI accesses
* @is_rc: tell whether the PCIe controller mode is Root Complex or Endpoint.
* @bus: In Root Complex mode, the bus number
* @ops: Platform specific ops to control various inputs from Cadence PCIe
* wrapper
*/
struct cdns_pcie {
void __iomem *reg_base;
struct resource *mem_res;
struct device *dev;
bool is_rc;
u8 bus;
int phy_count;
struct phy **phy;
struct device_link **link;
const struct cdns_pcie_common_ops *ops;
const struct cdns_pcie_ops *ops;
};
/**
@ -248,22 +284,28 @@ struct cdns_pcie {
* @dev: pointer to PCIe device
* @cfg_res: start/end offsets in the physical system memory to map PCI
* configuration space accesses
* @bus_range: first/last buses behind the PCIe host controller
* @cfg_base: IO mapped window to access the PCI configuration space of a
* single function at a time
* @no_bar_nbits: Number of bits to keep for inbound (PCIe -> CPU) address
* translation (nbits sets into the "no BAR match" register)
* @vendor_id: PCI vendor ID
* @device_id: PCI device ID
* @avail_ib_bar: Satus of RP_BAR0, RP_BAR1 and RP_NO_BAR if it's free or
* available
*/
struct cdns_pcie_rc {
struct cdns_pcie pcie;
struct resource *cfg_res;
struct resource *bus_range;
void __iomem *cfg_base;
u32 no_bar_nbits;
u32 vendor_id;
u32 device_id;
bool avail_ib_bar[CDNS_PCIE_RP_MAX_IB];
};
/**
* struct cdns_pcie_epf - Structure to hold info about endpoint function
* @epf_bar: reference to the pci_epf_bar for the six Base Address Registers
*/
struct cdns_pcie_epf {
struct pci_epf_bar *epf_bar[PCI_STD_NUM_BARS];
};
/**
@ -282,6 +324,10 @@ struct cdns_pcie_rc {
* @irq_pci_fn: the latest PCI function that has updated the mapping of
* the MSI/legacy IRQ dedicated outbound region.
* @irq_pending: bitmask of asserted legacy IRQs.
* @lock: spin lock to disable interrupts while modifying PCIe controller
* registers fields (RMW) accessible by both remote RC and EP to
* minimize time between read and write
* @epf: Structure to hold info about endpoint function
*/
struct cdns_pcie_ep {
struct cdns_pcie pcie;
@ -293,20 +339,13 @@ struct cdns_pcie_ep {
u64 irq_pci_addr;
u8 irq_pci_fn;
u8 irq_pending;
/* protect writing to PCI_STATUS while raising legacy interrupts */
spinlock_t lock;
struct cdns_pcie_epf *epf;
};
/* Register access */
static inline void cdns_pcie_writeb(struct cdns_pcie *pcie, u32 reg, u8 value)
{
writeb(value, pcie->reg_base + reg);
}
static inline void cdns_pcie_writew(struct cdns_pcie *pcie, u32 reg, u16 value)
{
writew(value, pcie->reg_base + reg);
}
static inline void cdns_pcie_writel(struct cdns_pcie *pcie, u32 reg, u32 value)
{
writel(value, pcie->reg_base + reg);
@ -317,30 +356,78 @@ static inline u32 cdns_pcie_readl(struct cdns_pcie *pcie, u32 reg)
return readl(pcie->reg_base + reg);
}
static inline u32 cdns_pcie_read_sz(void __iomem *addr, int size)
{
void __iomem *aligned_addr = PTR_ALIGN_DOWN(addr, 0x4);
unsigned int offset = (unsigned long)addr & 0x3;
u32 val = readl(aligned_addr);
if (!IS_ALIGNED((uintptr_t)addr, size)) {
pr_warn("Address %p and size %d are not aligned\n", addr, size);
return 0;
}
if (size > 2)
return val;
return (val >> (8 * offset)) & ((1 << (size * 8)) - 1);
}
static inline void cdns_pcie_write_sz(void __iomem *addr, int size, u32 value)
{
void __iomem *aligned_addr = PTR_ALIGN_DOWN(addr, 0x4);
unsigned int offset = (unsigned long)addr & 0x3;
u32 mask;
u32 val;
if (!IS_ALIGNED((uintptr_t)addr, size)) {
pr_warn("Address %p and size %d are not aligned\n", addr, size);
return;
}
if (size > 2) {
writel(value, addr);
return;
}
mask = ~(((1 << (size * 8)) - 1) << (offset * 8));
val = readl(aligned_addr) & mask;
val |= value << (offset * 8);
writel(val, aligned_addr);
}
/* Root Port register access */
static inline void cdns_pcie_rp_writeb(struct cdns_pcie *pcie,
u32 reg, u8 value)
{
writeb(value, pcie->reg_base + CDNS_PCIE_RP_BASE + reg);
void __iomem *addr = pcie->reg_base + CDNS_PCIE_RP_BASE + reg;
cdns_pcie_write_sz(addr, 0x1, value);
}
static inline void cdns_pcie_rp_writew(struct cdns_pcie *pcie,
u32 reg, u16 value)
{
writew(value, pcie->reg_base + CDNS_PCIE_RP_BASE + reg);
void __iomem *addr = pcie->reg_base + CDNS_PCIE_RP_BASE + reg;
cdns_pcie_write_sz(addr, 0x2, value);
}
/* Endpoint Function register access */
static inline void cdns_pcie_ep_fn_writeb(struct cdns_pcie *pcie, u8 fn,
u32 reg, u8 value)
{
writeb(value, pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
void __iomem *addr = pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg;
cdns_pcie_write_sz(addr, 0x1, value);
}
static inline void cdns_pcie_ep_fn_writew(struct cdns_pcie *pcie, u8 fn,
u32 reg, u16 value)
{
writew(value, pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
void __iomem *addr = pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg;
cdns_pcie_write_sz(addr, 0x2, value);
}
static inline void cdns_pcie_ep_fn_writel(struct cdns_pcie *pcie, u8 fn,
@ -349,14 +436,11 @@ static inline void cdns_pcie_ep_fn_writel(struct cdns_pcie *pcie, u8 fn,
writel(value, pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
}
static inline u8 cdns_pcie_ep_fn_readb(struct cdns_pcie *pcie, u8 fn, u32 reg)
{
return readb(pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
}
static inline u16 cdns_pcie_ep_fn_readw(struct cdns_pcie *pcie, u8 fn, u32 reg)
{
return readw(pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
void __iomem *addr = pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg;
return cdns_pcie_read_sz(addr, 0x2);
}
static inline u32 cdns_pcie_ep_fn_readl(struct cdns_pcie *pcie, u8 fn, u32 reg)
@ -364,13 +448,43 @@ static inline u32 cdns_pcie_ep_fn_readl(struct cdns_pcie *pcie, u8 fn, u32 reg)
return readl(pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
}
static inline int cdns_pcie_start_link(struct cdns_pcie *pcie)
{
if (pcie->ops->start_link)
return pcie->ops->start_link(pcie);
return 0;
}
static inline void cdns_pcie_stop_link(struct cdns_pcie *pcie)
{
if (pcie->ops->stop_link)
pcie->ops->stop_link(pcie);
}
static inline bool cdns_pcie_link_up(struct cdns_pcie *pcie)
{
if (pcie->ops->link_up)
return pcie->ops->link_up(pcie);
return true;
}
#ifdef CONFIG_PCIE_CADENCE_HOST
int cdns_pcie_host_setup(struct cdns_pcie_rc *rc);
void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
int where);
#else
static inline int cdns_pcie_host_setup(struct cdns_pcie_rc *rc)
{
return 0;
}
static inline void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
int where)
{
return NULL;
}
#endif
#ifdef CONFIG_PCIE_CADENCE_EP
@ -381,11 +495,12 @@ static inline int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep)
return 0;
}
#endif
void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 fn,
void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 busnr, u8 fn,
u32 r, bool is_io,
u64 cpu_addr, u64 pci_addr, size_t size);
void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie, u8 fn,
void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie,
u8 busnr, u8 fn,
u32 r, u64 cpu_addr);
void cdns_pcie_reset_outbound_region(struct cdns_pcie *pcie, u32 r);

24
drivers/pci/controller/dwc/pci-dra7xx.c
View File

@ -2,7 +2,7 @@
/*
* pcie-dra7xx - PCIe controller driver for TI DRA7xx SoCs
*
* Copyright (C) 2013-2014 Texas Instruments Incorporated - http://www.ti.com
* Copyright (C) 2013-2014 Texas Instruments Incorporated - https://www.ti.com
*
* Authors: Kishon Vijay Abraham I <kishon@ti.com>
*/
@ -593,13 +593,12 @@ static int __init dra7xx_add_pcie_ep(struct dra7xx_pcie *dra7xx,
ep = &pci->ep;
ep->ops = &pcie_ep_ops;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ep_dbics");
pci->dbi_base = devm_ioremap_resource(dev, res);
pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "ep_dbics");
if (IS_ERR(pci->dbi_base))
return PTR_ERR(pci->dbi_base);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ep_dbics2");
pci->dbi_base2 = devm_ioremap_resource(dev, res);
pci->dbi_base2 =
devm_platform_ioremap_resource_byname(pdev, "ep_dbics2");
if (IS_ERR(pci->dbi_base2))
return PTR_ERR(pci->dbi_base2);
@ -626,20 +625,16 @@ static int __init dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx,
struct dw_pcie *pci = dra7xx->pci;
struct pcie_port *pp = &pci->pp;
struct device *dev = pci->dev;
struct resource *res;
pp->irq = platform_get_irq(pdev, 1);
if (pp->irq < 0) {
dev_err(dev, "missing IRQ resource\n");
if (pp->irq < 0)
return pp->irq;
}
ret = dra7xx_pcie_init_irq_domain(pp);
if (ret < 0)
return ret;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rc_dbics");
pci->dbi_base = devm_ioremap_resource(dev, res);
pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "rc_dbics");
if (IS_ERR(pci->dbi_base))
return PTR_ERR(pci->dbi_base);
@ -871,10 +866,8 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
pci->ops = &dw_pcie_ops;
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(dev, "missing IRQ resource: %d\n", irq);
if (irq < 0)
return irq;
}
base = devm_platform_ioremap_resource_byname(pdev, "ti_conf");
if (IS_ERR(base))
@ -998,9 +991,8 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
return 0;
err_gpio:
pm_runtime_put(dev);
err_get_sync:
pm_runtime_put(dev);
pm_runtime_disable(dev);
dra7xx_pcie_disable_phy(dra7xx);

15
drivers/pci/controller/dwc/pci-exynos.c
View File

@ -3,7 +3,7 @@
* PCIe host controller driver for Samsung Exynos SoCs
*
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
* http://www.samsung.com
* https://www.samsung.com
*
* Author: Jingoo Han <jg1.han@samsung.com>
*/
@ -84,14 +84,12 @@ static int exynos5440_pcie_get_mem_resources(struct platform_device *pdev,
{
struct dw_pcie *pci = ep->pci;
struct device *dev = pci->dev;
struct resource *res;
ep->mem_res = devm_kzalloc(dev, sizeof(*ep->mem_res), GFP_KERNEL);
if (!ep->mem_res)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ep->mem_res->elbi_base = devm_ioremap_resource(dev, res);
ep->mem_res->elbi_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(ep->mem_res->elbi_base))
return PTR_ERR(ep->mem_res->elbi_base);
@ -402,10 +400,9 @@ static int __init exynos_add_pcie_port(struct exynos_pcie *ep,
int ret;
pp->irq = platform_get_irq(pdev, 1);
if (pp->irq < 0) {
dev_err(dev, "failed to get irq\n");
if (pp->irq < 0)
return pp->irq;
}
ret = devm_request_irq(dev, pp->irq, exynos_pcie_irq_handler,
IRQF_SHARED, "exynos-pcie", ep);
if (ret) {
@ -415,10 +412,8 @@ static int __init exynos_add_pcie_port(struct exynos_pcie *ep,
if (IS_ENABLED(CONFIG_PCI_MSI)) {
pp->msi_irq = platform_get_irq(pdev, 0);
if (pp->msi_irq < 0) {
dev_err(dev, "failed to get msi irq\n");
if (pp->msi_irq < 0)
return pp->msi_irq;
}
}
pp->ops = &exynos_pcie_host_ops;

8
drivers/pci/controller/dwc/pci-imx6.c
View File

@ -3,7 +3,7 @@
* PCIe host controller driver for Freescale i.MX6 SoCs
*
* Copyright (C) 2013 Kosagi
* http://www.kosagi.com
* https://www.kosagi.com
*
* Author: Sean Cross <xobs@kosagi.com>
*/
@ -868,10 +868,8 @@ static int imx6_add_pcie_port(struct imx6_pcie *imx6_pcie,
if (IS_ENABLED(CONFIG_PCI_MSI)) {
pp->msi_irq = platform_get_irq_byname(pdev, "msi");
if (pp->msi_irq < 0) {
dev_err(dev, "failed to get MSI irq\n");
if (pp->msi_irq < 0)
return pp->msi_irq;
}
}
pp->ops = &imx6_pcie_host_ops;
@ -1269,7 +1267,7 @@ static void imx6_pcie_quirk(struct pci_dev *dev)
if (bus->dev.parent->parent->driver != &imx6_pcie_driver.driver)
return;
if (bus->number == pp->root_bus_nr) {
if (pci_is_root_bus(bus)) {
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct imx6_pcie *imx6_pcie = to_imx6_pcie(pci);

13
drivers/pci/controller/dwc/pci-keystone.c
View File

@ -3,7 +3,7 @@
* PCIe host controller driver for Texas Instruments Keystone SoCs
*
* Copyright (C) 2013-2014 Texas Instruments., Ltd.
* http://www.ti.com
* https://www.ti.com
*
* Author: Murali Karicheri <m-karicheri2@ti.com>
* Implementation based on pci-exynos.c and pcie-designware.c
@ -440,7 +440,7 @@ static int ks_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
reg = CFG_BUS(bus->number) | CFG_DEVICE(PCI_SLOT(devfn)) |
CFG_FUNC(PCI_FUNC(devfn));
if (bus->parent->number != pp->root_bus_nr)
if (!pci_is_root_bus(bus->parent))
reg |= CFG_TYPE1;
ks_pcie_app_writel(ks_pcie, CFG_SETUP, reg);
@ -457,7 +457,7 @@ static int ks_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
reg = CFG_BUS(bus->number) | CFG_DEVICE(PCI_SLOT(devfn)) |
CFG_FUNC(PCI_FUNC(devfn));
if (bus->parent->number != pp->root_bus_nr)
if (!pci_is_root_bus(bus->parent))
reg |= CFG_TYPE1;
ks_pcie_app_writel(ks_pcie, CFG_SETUP, reg);
@ -1250,10 +1250,8 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
pci->version = version;
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(dev, "missing IRQ resource: %d\n", irq);
if (irq < 0)
return irq;
}
ret = request_irq(irq, ks_pcie_err_irq_handler, IRQF_SHARED,
"ks-pcie-error-irq", ks_pcie);
@ -1323,8 +1321,7 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
}
if (pci->version >= 0x480A) {
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "atu");
atu_base = devm_ioremap_resource(dev, res);
atu_base = devm_platform_ioremap_resource_byname(pdev, "atu");
if (IS_ERR(atu_base)) {
ret = PTR_ERR(atu_base);
goto err_get_sync;

4
drivers/pci/controller/dwc/pci-meson.c
View File

@ -488,10 +488,8 @@ static int meson_add_pcie_port(struct meson_pcie *mp,
if (IS_ENABLED(CONFIG_PCI_MSI)) {
pp->msi_irq = platform_get_irq(pdev, 0);
if (pp->msi_irq < 0) {
dev_err(dev, "failed to get MSI IRQ\n");
if (pp->msi_irq < 0)
return pp->msi_irq;
}
}
pp->ops = &meson_pcie_host_ops;

13
drivers/pci/controller/dwc/pcie-al.c
View File

@ -67,13 +67,8 @@ static int al_pcie_init(struct pci_config_window *cfg)
dev_dbg(dev, "Root port dbi res: %pR\n", res);
al_pcie->dbi_base = devm_pci_remap_cfg_resource(dev, res);
if (IS_ERR(al_pcie->dbi_base)) {
long err = PTR_ERR(al_pcie->dbi_base);
dev_err(dev, "couldn't remap dbi base %pR (err:%ld)\n",
res, err);
return err;
}
if (IS_ERR(al_pcie->dbi_base))
return PTR_ERR(al_pcie->dbi_base);
cfg->priv = al_pcie;
@ -408,10 +403,8 @@ static int al_pcie_probe(struct platform_device *pdev)
dbi_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
pci->dbi_base = devm_pci_remap_cfg_resource(dev, dbi_res);
if (IS_ERR(pci->dbi_base)) {
dev_err(dev, "couldn't remap dbi base %pR\n", dbi_res);
if (IS_ERR(pci->dbi_base))
return PTR_ERR(pci->dbi_base);
}
ecam_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
if (!ecam_res) {

5
drivers/pci/controller/dwc/pcie-armada8k.c
View File

@ -248,10 +248,8 @@ static int armada8k_add_pcie_port(struct armada8k_pcie *pcie,
pp->ops = &armada8k_pcie_host_ops;
pp->irq = platform_get_irq(pdev, 0);
if (pp->irq < 0) {
dev_err(dev, "failed to get irq for port\n");
if (pp->irq < 0)
return pp->irq;
}
ret = devm_request_irq(dev, pp->irq, armada8k_pcie_irq_handler,
IRQF_SHARED, "armada8k-pcie", pcie);
@ -317,7 +315,6 @@ static int armada8k_pcie_probe(struct platform_device *pdev)
base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ctrl");
pci->dbi_base = devm_pci_remap_cfg_resource(dev, base);
if (IS_ERR(pci->dbi_base)) {
dev_err(dev, "couldn't remap regs base %p\n", base);
ret = PTR_ERR(pci->dbi_base);
goto fail_clkreg;
}

16
drivers/pci/controller/dwc/pcie-artpec6.c
View File

@ -387,10 +387,8 @@ static int artpec6_add_pcie_port(struct artpec6_pcie *artpec6_pcie,
if (IS_ENABLED(CONFIG_PCI_MSI)) {
pp->msi_irq = platform_get_irq_byname(pdev, "msi");
if (pp->msi_irq < 0) {
dev_err(dev, "failed to get MSI irq\n");
if (pp->msi_irq < 0)
return pp->msi_irq;
}
}
pp->ops = &artpec6_pcie_host_ops;
@ -455,8 +453,7 @@ static int artpec6_add_pcie_ep(struct artpec6_pcie *artpec6_pcie,
ep = &pci->ep;
ep->ops = &pcie_ep_ops;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi2");
pci->dbi_base2 = devm_ioremap_resource(dev, res);
pci->dbi_base2 = devm_platform_ioremap_resource_byname(pdev, "dbi2");
if (IS_ERR(pci->dbi_base2))
return PTR_ERR(pci->dbi_base2);
@ -481,8 +478,6 @@ static int artpec6_pcie_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct dw_pcie *pci;
struct artpec6_pcie *artpec6_pcie;
struct resource *dbi_base;
struct resource *phy_base;
int ret;
const struct of_device_id *match;
const struct artpec_pcie_of_data *data;
@ -512,13 +507,12 @@ static int artpec6_pcie_probe(struct platform_device *pdev)
artpec6_pcie->variant = variant;
artpec6_pcie->mode = mode;
dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
pci->dbi_base = devm_ioremap_resource(dev, dbi_base);
pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
if (IS_ERR(pci->dbi_base))
return PTR_ERR(pci->dbi_base);
phy_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
artpec6_pcie->phy_base = devm_ioremap_resource(dev, phy_base);
artpec6_pcie->phy_base =
devm_platform_ioremap_resource_byname(pdev, "phy");
if (IS_ERR(artpec6_pcie->phy_base))
return PTR_ERR(artpec6_pcie->phy_base);

2
drivers/pci/controller/dwc/pcie-designware-ep.c
View File

@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
/**
/*
* Synopsys DesignWare PCIe Endpoint controller driver
*
* Copyright (C) 2017 Texas Instruments

27
drivers/pci/controller/dwc/pcie-designware-host.c
View File

@ -3,7 +3,7 @@
* Synopsys DesignWare PCIe host controller driver
*
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
* http://www.samsung.com
* https://www.samsung.com
*
* Author: Jingoo Han <jg1.han@samsung.com>
*/
@ -346,11 +346,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
if (!bridge)
return -ENOMEM;
ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
&bridge->dma_ranges, NULL);
if (ret)
return ret;
/* Get the I/O and memory ranges from DT */
resource_list_for_each_entry(win, &bridge->windows) {
switch (resource_type(win->res)) {
@ -473,14 +468,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
goto err_free_msi;
}
pp->root_bus_nr = pp->busn->start;
bridge->dev.parent = dev;
bridge->sysdata = pp;
bridge->busnr = pp->root_bus_nr;
bridge->ops = &dw_pcie_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
ret = pci_scan_root_bus_bridge(bridge);
if (ret)
@ -529,7 +518,7 @@ static int dw_pcie_access_other_conf(struct pcie_port *pp, struct pci_bus *bus,
busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
PCIE_ATU_FUNC(PCI_FUNC(devfn));
if (bus->parent->number == pp->root_bus_nr) {
if (pci_is_root_bus(bus->parent)) {
type = PCIE_ATU_TYPE_CFG0;
cpu_addr = pp->cfg0_base;
cfg_size = pp->cfg0_size;
@ -585,13 +574,11 @@ static int dw_pcie_valid_device(struct pcie_port *pp, struct pci_bus *bus,
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
/* If there is no link, then there is no device */
if (bus->number != pp->root_bus_nr) {
if (!pci_is_root_bus(bus)) {
if (!dw_pcie_link_up(pci))
return 0;
}
/* Access only one slot on each root port */
if (bus->number == pp->root_bus_nr && dev > 0)
} else if (dev > 0)
/* Access only one slot on each root port */
return 0;
return 1;
@ -607,7 +594,7 @@ static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
return PCIBIOS_DEVICE_NOT_FOUND;
}
if (bus->number == pp->root_bus_nr)
if (pci_is_root_bus(bus))
return dw_pcie_rd_own_conf(pp, where, size, val);
return dw_pcie_rd_other_conf(pp, bus, devfn, where, size, val);
@ -621,7 +608,7 @@ static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
if (!dw_pcie_valid_device(pp, bus, PCI_SLOT(devfn)))
return PCIBIOS_DEVICE_NOT_FOUND;
if (bus->number == pp->root_bus_nr)
if (pci_is_root_bus(bus))
return dw_pcie_wr_own_conf(pp, where, size, val);
return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val);

3
drivers/pci/controller/dwc/pcie-designware-plat.c
View File

@ -153,8 +153,7 @@ static int dw_plat_add_pcie_ep(struct dw_plat_pcie *dw_plat_pcie,
ep = &pci->ep;
ep->ops = &pcie_ep_ops;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi2");
pci->dbi_base2 = devm_ioremap_resource(dev, res);
pci->dbi_base2 = devm_platform_ioremap_resource_byname(pdev, "dbi2");
if (IS_ERR(pci->dbi_base2))
return PTR_ERR(pci->dbi_base2);

2
drivers/pci/controller/dwc/pcie-designware.c
View File

@ -3,7 +3,7 @@
* Synopsys DesignWare PCIe host controller driver
*
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
* http://www.samsung.com
* https://www.samsung.com
*
* Author: Jingoo Han <jg1.han@samsung.com>
*/

3
drivers/pci/controller/dwc/pcie-designware.h
View File

@ -3,7 +3,7 @@
* Synopsys DesignWare PCIe host controller driver
*
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
* http://www.samsung.com
* https://www.samsung.com
*
* Author: Jingoo Han <jg1.han@samsung.com>
*/
@ -173,7 +173,6 @@ struct dw_pcie_host_ops {
};
struct pcie_port {
u8 root_bus_nr;
u64 cfg0_base;
void __iomem *va_cfg0_base;
u32 cfg0_size;

219
drivers/pci/controller/dwc/pcie-hisi.c
View File

@ -10,15 +10,10 @@
*/
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/mfd/syscon.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
#include <linux/platform_device.h>
#include <linux/of_device.h>
#include <linux/pci.h>
#include <linux/pci-acpi.h>
#include <linux/pci-ecam.h>
#include <linux/regmap.h>
#include "../../pci.h"
#if defined(CONFIG_PCI_HISI) || (defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS))
@ -118,220 +113,6 @@ const struct pci_ecam_ops hisi_pcie_ops = {
#ifdef CONFIG_PCI_HISI
#include "pcie-designware.h"
#define PCIE_SUBCTRL_SYS_STATE4_REG 0x6818
#define PCIE_HIP06_CTRL_OFF 0x1000
#define PCIE_SYS_STATE4 (PCIE_HIP06_CTRL_OFF + 0x31c)
#define PCIE_LTSSM_LINKUP_STATE 0x11
#define PCIE_LTSSM_STATE_MASK 0x3F
#define to_hisi_pcie(x) dev_get_drvdata((x)->dev)
struct hisi_pcie;
struct pcie_soc_ops {
int (*hisi_pcie_link_up)(struct hisi_pcie *hisi_pcie);
};
struct hisi_pcie {
struct dw_pcie *pci;
struct regmap *subctrl;
u32 port_id;
const struct pcie_soc_ops *soc_ops;
};
/* HipXX PCIe host only supports 32-bit config access */
static int hisi_pcie_cfg_read(struct pcie_port *pp, int where, int size,
u32 *val)
{
u32 reg;
u32 reg_val;
void *walker = &reg_val;
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
walker += (where & 0x3);
reg = where & ~0x3;
reg_val = dw_pcie_readl_dbi(pci, reg);
if (size == 1)
*val = *(u8 __force *) walker;
else if (size == 2)
*val = *(u16 __force *) walker;
else if (size == 4)
*val = reg_val;
else
return PCIBIOS_BAD_REGISTER_NUMBER;
return PCIBIOS_SUCCESSFUL;
}
/* HipXX PCIe host only supports 32-bit config access */
static int hisi_pcie_cfg_write(struct pcie_port *pp, int where, int size,
u32 val)
{
u32 reg_val;
u32 reg;
void *walker = &reg_val;
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
walker += (where & 0x3);
reg = where & ~0x3;
if (size == 4)
dw_pcie_writel_dbi(pci, reg, val);
else if (size == 2) {
reg_val = dw_pcie_readl_dbi(pci, reg);
*(u16 __force *) walker = val;
dw_pcie_writel_dbi(pci, reg, reg_val);
} else if (size == 1) {
reg_val = dw_pcie_readl_dbi(pci, reg);
*(u8 __force *) walker = val;
dw_pcie_writel_dbi(pci, reg, reg_val);
} else
return PCIBIOS_BAD_REGISTER_NUMBER;
return PCIBIOS_SUCCESSFUL;
}
static int hisi_pcie_link_up_hip05(struct hisi_pcie *hisi_pcie)
{
u32 val;
regmap_read(hisi_pcie->subctrl, PCIE_SUBCTRL_SYS_STATE4_REG +
0x100 * hisi_pcie->port_id, &val);
return ((val & PCIE_LTSSM_STATE_MASK) == PCIE_LTSSM_LINKUP_STATE);
}
static int hisi_pcie_link_up_hip06(struct hisi_pcie *hisi_pcie)
{
struct dw_pcie *pci = hisi_pcie->pci;
u32 val;
val = dw_pcie_readl_dbi(pci, PCIE_SYS_STATE4);
return ((val & PCIE_LTSSM_STATE_MASK) == PCIE_LTSSM_LINKUP_STATE);
}
static int hisi_pcie_link_up(struct dw_pcie *pci)
{
struct hisi_pcie *hisi_pcie = to_hisi_pcie(pci);
return hisi_pcie->soc_ops->hisi_pcie_link_up(hisi_pcie);
}
static const struct dw_pcie_host_ops hisi_pcie_host_ops = {
.rd_own_conf = hisi_pcie_cfg_read,
.wr_own_conf = hisi_pcie_cfg_write,
};
static int hisi_add_pcie_port(struct hisi_pcie *hisi_pcie,
struct platform_device *pdev)
{
struct dw_pcie *pci = hisi_pcie->pci;
struct pcie_port *pp = &pci->pp;
struct device *dev = &pdev->dev;
int ret;
u32 port_id;
if (of_property_read_u32(dev->of_node, "port-id", &port_id)) {
dev_err(dev, "failed to read port-id\n");
return -EINVAL;
}
if (port_id > 3) {
dev_err(dev, "Invalid port-id: %d\n", port_id);
return -EINVAL;
}
hisi_pcie->port_id = port_id;
pp->ops = &hisi_pcie_host_ops;
ret = dw_pcie_host_init(pp);
if (ret) {
dev_err(dev, "failed to initialize host\n");
return ret;
}
return 0;
}
static const struct dw_pcie_ops dw_pcie_ops = {
.link_up = hisi_pcie_link_up,
};
static int hisi_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct dw_pcie *pci;
struct hisi_pcie *hisi_pcie;
struct resource *reg;
int ret;
hisi_pcie = devm_kzalloc(dev, sizeof(*hisi_pcie), GFP_KERNEL);
if (!hisi_pcie)
return -ENOMEM;
pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
if (!pci)
return -ENOMEM;
pci->dev = dev;
pci->ops = &dw_pcie_ops;
hisi_pcie->pci = pci;
hisi_pcie->soc_ops = of_device_get_match_data(dev);
hisi_pcie->subctrl =
syscon_regmap_lookup_by_compatible("hisilicon,pcie-sas-subctrl");
if (IS_ERR(hisi_pcie->subctrl)) {
dev_err(dev, "cannot get subctrl base\n");
return PTR_ERR(hisi_pcie->subctrl);
}
reg = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rc_dbi");
pci->dbi_base = devm_pci_remap_cfg_resource(dev, reg);
if (IS_ERR(pci->dbi_base))
return PTR_ERR(pci->dbi_base);
platform_set_drvdata(pdev, hisi_pcie);
ret = hisi_add_pcie_port(hisi_pcie, pdev);
if (ret)
return ret;
return 0;
}
static struct pcie_soc_ops hip05_ops = {
&hisi_pcie_link_up_hip05
};
static struct pcie_soc_ops hip06_ops = {
&hisi_pcie_link_up_hip06
};
static const struct of_device_id hisi_pcie_of_match[] = {
{
.compatible = "hisilicon,hip05-pcie",
.data = (void *) &hip05_ops,
},
{
.compatible = "hisilicon,hip06-pcie",
.data = (void *) &hip06_ops,
},
{},
};
static struct platform_driver hisi_pcie_driver = {
.probe = hisi_pcie_probe,
.driver = {
.name = "hisi-pcie",
.of_match_table = hisi_pcie_of_match,
.suppress_bind_attrs = true,
},
};
builtin_platform_driver(hisi_pcie_driver);
static int hisi_pcie_platform_init(struct pci_config_window *cfg)
{
struct device *dev = cfg->parent;

11
drivers/pci/controller/dwc/pcie-histb.c
View File

@ -304,7 +304,6 @@ static int histb_pcie_probe(struct platform_device *pdev)
struct histb_pcie *hipcie;
struct dw_pcie *pci;
struct pcie_port *pp;
struct resource *res;
struct device_node *np = pdev->dev.of_node;
struct device *dev = &pdev->dev;
enum of_gpio_flags of_flags;
@ -324,15 +323,13 @@ static int histb_pcie_probe(struct platform_device *pdev)
pci->dev = dev;
pci->ops = &dw_pcie_ops;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "control");
hipcie->ctrl = devm_ioremap_resource(dev, res);
hipcie->ctrl = devm_platform_ioremap_resource_byname(pdev, "control");
if (IS_ERR(hipcie->ctrl)) {
dev_err(dev, "cannot get control reg base\n");
return PTR_ERR(hipcie->ctrl);
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rc-dbi");
pci->dbi_base = devm_ioremap_resource(dev, res);
pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "rc-dbi");
if (IS_ERR(pci->dbi_base)) {
dev_err(dev, "cannot get rc-dbi base\n");
return PTR_ERR(pci->dbi_base);
@ -402,10 +399,8 @@ static int histb_pcie_probe(struct platform_device *pdev)
if (IS_ENABLED(CONFIG_PCI_MSI)) {
pp->msi_irq = platform_get_irq_byname(pdev, "msi");
if (pp->msi_irq < 0) {
dev_err(dev, "Failed to get MSI IRQ\n");
if (pp->msi_irq < 0)
return pp->msi_irq;
}
}
hipcie->phy = devm_phy_get(dev, "phy");

7
drivers/pci/controller/dwc/pcie-intel-gw.c
View File

@ -253,11 +253,9 @@ static int intel_pcie_get_resources(struct platform_device *pdev)
struct intel_pcie_port *lpp = platform_get_drvdata(pdev);
struct dw_pcie *pci = &lpp->pci;
struct device *dev = pci->dev;
struct resource *res;
int ret;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
pci->dbi_base = devm_ioremap_resource(dev, res);
pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
if (IS_ERR(pci->dbi_base))
return PTR_ERR(pci->dbi_base);
@ -291,8 +289,7 @@ static int intel_pcie_get_resources(struct platform_device *pdev)
ret = of_pci_get_max_link_speed(dev->of_node);
lpp->link_gen = ret < 0 ? 0 : ret;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "app");
lpp->app_base = devm_ioremap_resource(dev, res);
lpp->app_base = devm_platform_ioremap_resource_byname(pdev, "app");
if (IS_ERR(lpp->app_base))
return PTR_ERR(lpp->app_base);

24
drivers/pci/controller/dwc/pcie-kirin.c
View File

@ -3,7 +3,7 @@
* PCIe host controller driver for Kirin Phone SoCs
*
* Copyright (C) 2017 HiSilicon Electronics Co., Ltd.
* http://www.huawei.com
* https://www.huawei.com
*
* Author: Xiaowei Song <songxiaowei@huawei.com>
*/
@ -147,23 +147,18 @@ static long kirin_pcie_get_clk(struct kirin_pcie *kirin_pcie,
static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *apb;
struct resource *phy;
struct resource *dbi;
apb = platform_get_resource_byname(pdev, IORESOURCE_MEM, "apb");
kirin_pcie->apb_base = devm_ioremap_resource(dev, apb);
kirin_pcie->apb_base =
devm_platform_ioremap_resource_byname(pdev, "apb");
if (IS_ERR(kirin_pcie->apb_base))
return PTR_ERR(kirin_pcie->apb_base);
phy = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
kirin_pcie->phy_base = devm_ioremap_resource(dev, phy);
kirin_pcie->phy_base =
devm_platform_ioremap_resource_byname(pdev, "phy");
if (IS_ERR(kirin_pcie->phy_base))
return PTR_ERR(kirin_pcie->phy_base);
dbi = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
kirin_pcie->pci->dbi_base = devm_ioremap_resource(dev, dbi);
kirin_pcie->pci->dbi_base =
devm_platform_ioremap_resource_byname(pdev, "dbi");
if (IS_ERR(kirin_pcie->pci->dbi_base))
return PTR_ERR(kirin_pcie->pci->dbi_base);
@ -455,11 +450,8 @@ static int kirin_pcie_add_msi(struct dw_pcie *pci,
if (IS_ENABLED(CONFIG_PCI_MSI)) {
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev,
"failed to get MSI IRQ (%d)\n", irq);
if (irq < 0)
return irq;
}
pci->pp.msi_irq = irq;
}

198
drivers/pci/controller/dwc/pcie-qcom.c
View File

@ -27,6 +27,7 @@
#include <linux/slab.h>
#include <linux/types.h>
#include "../../pci.h"
#include "pcie-designware.h"
#define PCIE20_PARF_SYS_CTRL 0x00
@ -39,13 +40,14 @@
#define L23_CLK_RMV_DIS BIT(2)
#define L1_CLK_RMV_DIS BIT(1)
#define PCIE20_COMMAND_STATUS 0x04
#define CMD_BME_VAL 0x4
#define PCIE20_DEVICE_CONTROL2_STATUS2 0x98
#define PCIE_CAP_CPL_TIMEOUT_DISABLE 0x10
#define PCIE20_PARF_PHY_CTRL 0x40
#define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK GENMASK(20, 16)
#define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) ((x) << 16)
#define PCIE20_PARF_PHY_REFCLK 0x4C
#define PHY_REFCLK_SSP_EN BIT(16)
#define PHY_REFCLK_USE_PAD BIT(12)
#define PCIE20_PARF_DBI_BASE_ADDR 0x168
#define PCIE20_PARF_SLV_ADDR_SPACE_SIZE 0x16C
#define PCIE20_PARF_MHI_CLOCK_RESET_CTRL 0x174
@ -66,8 +68,8 @@
#define CFG_BRIDGE_SB_INIT BIT(0)
#define PCIE20_CAP 0x70
#define PCIE20_CAP_LINK_CAPABILITIES (PCIE20_CAP + 0xC)
#define PCIE20_CAP_ACTIVE_STATE_LINK_PM_SUPPORT (BIT(10) | BIT(11))
#define PCIE20_DEVICE_CONTROL2_STATUS2 (PCIE20_CAP + PCI_EXP_DEVCTL2)
#define PCIE20_CAP_LINK_CAPABILITIES (PCIE20_CAP + PCI_EXP_LNKCAP)
#define PCIE20_CAP_LINK_1 (PCIE20_CAP + 0x14)
#define PCIE_CAP_LINK1_VAL 0x2FD7F
@ -77,22 +79,36 @@
#define DBI_RO_WR_EN 1
#define PERST_DELAY_US 1000
/* PARF registers */
#define PCIE20_PARF_PCS_DEEMPH 0x34
#define PCS_DEEMPH_TX_DEEMPH_GEN1(x) ((x) << 16)
#define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) ((x) << 8)
#define PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(x) ((x) << 0)
#define PCIE20_PARF_PCS_SWING 0x38
#define PCS_SWING_TX_SWING_FULL(x) ((x) << 8)
#define PCS_SWING_TX_SWING_LOW(x) ((x) << 0)
#define PCIE20_PARF_CONFIG_BITS 0x50
#define PHY_RX0_EQ(x) ((x) << 24)
#define PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE 0x358
#define SLV_ADDR_SPACE_SZ 0x10000000
#define PCIE20_LNK_CONTROL2_LINK_STATUS2 0xa0
#define DEVICE_TYPE_RC 0x4
#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
#define QCOM_PCIE_2_1_0_MAX_CLOCKS 5
struct qcom_pcie_resources_2_1_0 {
struct clk *iface_clk;
struct clk *core_clk;
struct clk *phy_clk;
struct clk_bulk_data clks[QCOM_PCIE_2_1_0_MAX_CLOCKS];
struct reset_control *pci_reset;
struct reset_control *axi_reset;
struct reset_control *ahb_reset;
struct reset_control *por_reset;
struct reset_control *phy_reset;
struct reset_control *ext_reset;
struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
};
@ -177,6 +193,7 @@ struct qcom_pcie {
struct phy *phy;
struct gpio_desc *reset;
const struct qcom_pcie_ops *ops;
int gen;
};
#define to_qcom_pcie(x) dev_get_drvdata((x)->dev)
@ -234,17 +251,21 @@ static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie)
if (ret)
return ret;
res->iface_clk = devm_clk_get(dev, "iface");
if (IS_ERR(res->iface_clk))
return PTR_ERR(res->iface_clk);
res->clks[0].id = "iface";
res->clks[1].id = "core";
res->clks[2].id = "phy";
res->clks[3].id = "aux";
res->clks[4].id = "ref";
res->core_clk = devm_clk_get(dev, "core");
if (IS_ERR(res->core_clk))
return PTR_ERR(res->core_clk);
/* iface, core, phy are required */
ret = devm_clk_bulk_get(dev, 3, res->clks);
if (ret < 0)
return ret;
res->phy_clk = devm_clk_get(dev, "phy");
if (IS_ERR(res->phy_clk))
return PTR_ERR(res->phy_clk);
/* aux, ref are optional */
ret = devm_clk_bulk_get_optional(dev, 2, res->clks + 3);
if (ret < 0)
return ret;
res->pci_reset = devm_reset_control_get_exclusive(dev, "pci");
if (IS_ERR(res->pci_reset))
@ -262,6 +283,10 @@ static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie)
if (IS_ERR(res->por_reset))
return PTR_ERR(res->por_reset);
res->ext_reset = devm_reset_control_get_optional_exclusive(dev, "ext");
if (IS_ERR(res->ext_reset))
return PTR_ERR(res->ext_reset);
res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
return PTR_ERR_OR_ZERO(res->phy_reset);
}
@ -270,14 +295,13 @@ static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
reset_control_assert(res->pci_reset);
reset_control_assert(res->axi_reset);
reset_control_assert(res->ahb_reset);
reset_control_assert(res->por_reset);
reset_control_assert(res->pci_reset);
clk_disable_unprepare(res->iface_clk);
clk_disable_unprepare(res->core_clk);
clk_disable_unprepare(res->phy_clk);
reset_control_assert(res->ext_reset);
reset_control_assert(res->phy_reset);
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
}
@ -286,6 +310,7 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
struct dw_pcie *pci = pcie->pci;
struct device *dev = pci->dev;
struct device_node *node = dev->of_node;
u32 val;
int ret;
@ -295,73 +320,85 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
return ret;
}
ret = reset_control_assert(res->ahb_reset);
if (ret) {
dev_err(dev, "cannot assert ahb reset\n");
goto err_assert_ahb;
}
ret = clk_prepare_enable(res->iface_clk);
if (ret) {
dev_err(dev, "cannot prepare/enable iface clock\n");
goto err_assert_ahb;
}
ret = clk_prepare_enable(res->phy_clk);
if (ret) {
dev_err(dev, "cannot prepare/enable phy clock\n");
goto err_clk_phy;
}
ret = clk_prepare_enable(res->core_clk);
if (ret) {
dev_err(dev, "cannot prepare/enable core clock\n");
goto err_clk_core;
}
ret = reset_control_deassert(res->ahb_reset);
if (ret) {
dev_err(dev, "cannot deassert ahb reset\n");
goto err_deassert_ahb;
}
/* enable PCIe clocks and resets */
val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
val &= ~BIT(0);
writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
/* enable external reference clock */
val = readl(pcie->parf + PCIE20_PARF_PHY_REFCLK);
val |= BIT(16);
writel(val, pcie->parf + PCIE20_PARF_PHY_REFCLK);
ret = reset_control_deassert(res->ext_reset);
if (ret) {
dev_err(dev, "cannot deassert ext reset\n");
goto err_deassert_ext;
}
ret = reset_control_deassert(res->phy_reset);
if (ret) {
dev_err(dev, "cannot deassert phy reset\n");
return ret;
goto err_deassert_phy;
}
ret = reset_control_deassert(res->pci_reset);
if (ret) {
dev_err(dev, "cannot deassert pci reset\n");
return ret;
goto err_deassert_pci;
}
ret = reset_control_deassert(res->por_reset);
if (ret) {
dev_err(dev, "cannot deassert por reset\n");
return ret;
goto err_deassert_por;
}
ret = reset_control_deassert(res->axi_reset);
if (ret) {
dev_err(dev, "cannot deassert axi reset\n");
return ret;
goto err_deassert_axi;
}
ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
if (ret)
goto err_clks;
/* enable PCIe clocks and resets */
val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
val &= ~BIT(0);
writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
if (of_device_is_compatible(node, "qcom,pcie-ipq8064") ||
of_device_is_compatible(node, "qcom,pcie-ipq8064-v2")) {
writel(PCS_DEEMPH_TX_DEEMPH_GEN1(24) |
PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(24) |
PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(34),
pcie->parf + PCIE20_PARF_PCS_DEEMPH);
writel(PCS_SWING_TX_SWING_FULL(120) |
PCS_SWING_TX_SWING_LOW(120),
pcie->parf + PCIE20_PARF_PCS_SWING);
writel(PHY_RX0_EQ(4), pcie->parf + PCIE20_PARF_CONFIG_BITS);
}
if (of_device_is_compatible(node, "qcom,pcie-ipq8064")) {
/* set TX termination offset */
val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
val &= ~PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK;
val |= PHY_CTRL_PHY_TX0_TERM_OFFSET(7);
writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
}
/* enable external reference clock */
val = readl(pcie->parf + PCIE20_PARF_PHY_REFCLK);
val &= ~PHY_REFCLK_USE_PAD;
val |= PHY_REFCLK_SSP_EN;
writel(val, pcie->parf + PCIE20_PARF_PHY_REFCLK);
/* wait for clock acquisition */
usleep_range(1000, 1500);
if (pcie->gen == 1) {
val = readl(pci->dbi_base + PCIE20_LNK_CONTROL2_LINK_STATUS2);
val |= PCI_EXP_LNKSTA_CLS_2_5GB;
writel(val, pci->dbi_base + PCIE20_LNK_CONTROL2_LINK_STATUS2);
}
/* Set the Max TLP size to 2K, instead of using default of 4K */
writel(CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K,
@ -371,13 +408,19 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
return 0;
err_clks:
reset_control_assert(res->axi_reset);
err_deassert_axi:
reset_control_assert(res->por_reset);
err_deassert_por:
reset_control_assert(res->pci_reset);
err_deassert_pci:
reset_control_assert(res->phy_reset);
err_deassert_phy:
reset_control_assert(res->ext_reset);
err_deassert_ext:
reset_control_assert(res->ahb_reset);
err_deassert_ahb:
clk_disable_unprepare(res->core_clk);
err_clk_core:
clk_disable_unprepare(res->phy_clk);
err_clk_phy:
clk_disable_unprepare(res->iface_clk);
err_assert_ahb:
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
return ret;
@ -1047,15 +1090,15 @@ static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
pcie->parf + PCIE20_PARF_SYS_CTRL);
writel(0, pcie->parf + PCIE20_PARF_Q2A_FLUSH);
writel(CMD_BME_VAL, pci->dbi_base + PCIE20_COMMAND_STATUS);
writel(PCI_COMMAND_MASTER, pci->dbi_base + PCI_COMMAND);
writel(DBI_RO_WR_EN, pci->dbi_base + PCIE20_MISC_CONTROL_1_REG);
writel(PCIE_CAP_LINK1_VAL, pci->dbi_base + PCIE20_CAP_LINK_1);
val = readl(pci->dbi_base + PCIE20_CAP_LINK_CAPABILITIES);
val &= ~PCIE20_CAP_ACTIVE_STATE_LINK_PM_SUPPORT;
val &= ~PCI_EXP_LNKCAP_ASPMS;
writel(val, pci->dbi_base + PCIE20_CAP_LINK_CAPABILITIES);
writel(PCIE_CAP_CPL_TIMEOUT_DISABLE, pci->dbi_base +
writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base +
PCIE20_DEVICE_CONTROL2_STATUS2);
return 0;
@ -1339,10 +1382,8 @@ static int qcom_pcie_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
pm_runtime_disable(dev);
return ret;
}
if (ret < 0)
goto err_pm_runtime_put;
pci->dev = dev;
pci->ops = &dw_pcie_ops;
@ -1358,8 +1399,11 @@ static int qcom_pcie_probe(struct platform_device *pdev)
goto err_pm_runtime_put;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "parf");
pcie->parf = devm_ioremap_resource(dev, res);
pcie->gen = of_pci_get_max_link_speed(pdev->dev.of_node);
if (pcie->gen < 0)
pcie->gen = 2;
pcie->parf = devm_platform_ioremap_resource_byname(pdev, "parf");
if (IS_ERR(pcie->parf)) {
ret = PTR_ERR(pcie->parf);
goto err_pm_runtime_put;
@ -1372,8 +1416,7 @@ static int qcom_pcie_probe(struct platform_device *pdev)
goto err_pm_runtime_put;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "elbi");
pcie->elbi = devm_ioremap_resource(dev, res);
pcie->elbi = devm_platform_ioremap_resource_byname(pdev, "elbi");
if (IS_ERR(pcie->elbi)) {
ret = PTR_ERR(pcie->elbi);
goto err_pm_runtime_put;
@ -1426,6 +1469,7 @@ err_pm_runtime_put:
static const struct of_device_id qcom_pcie_match[] = {
{ .compatible = "qcom,pcie-apq8084", .data = &ops_1_0_0 },
{ .compatible = "qcom,pcie-ipq8064", .data = &ops_2_1_0 },
{ .compatible = "qcom,pcie-ipq8064-v2", .data = &ops_2_1_0 },
{ .compatible = "qcom,pcie-apq8064", .data = &ops_2_1_0 },
{ .compatible = "qcom,pcie-msm8996", .data = &ops_2_3_2 },
{ .compatible = "qcom,pcie-ipq8074", .data = &ops_2_3_3 },

6
drivers/pci/controller/dwc/pcie-spear13xx.c
View File

@ -198,10 +198,9 @@ static int spear13xx_add_pcie_port(struct spear13xx_pcie *spear13xx_pcie,
int ret;
pp->irq = platform_get_irq(pdev, 0);
if (pp->irq < 0) {
dev_err(dev, "failed to get irq\n");
if (pp->irq < 0)
return pp->irq;
}
ret = devm_request_irq(dev, pp->irq, spear13xx_pcie_irq_handler,
IRQF_SHARED | IRQF_NO_THREAD,
"spear1340-pcie", spear13xx_pcie);
@ -273,7 +272,6 @@ static int spear13xx_pcie_probe(struct platform_device *pdev)
dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
pci->dbi_base = devm_pci_remap_cfg_resource(dev, dbi_base);
if (IS_ERR(pci->dbi_base)) {
dev_err(dev, "couldn't remap dbi base %p\n", dbi_base);
ret = PTR_ERR(pci->dbi_base);
goto fail_clk;
}

4
drivers/pci/controller/dwc/pcie-tegra194.c
View File

@ -2189,10 +2189,8 @@ static int tegra_pcie_dw_probe(struct platform_device *pdev)
}
pp->irq = platform_get_irq_byname(pdev, "intr");
if (pp->irq < 0) {
dev_err(dev, "Failed to get \"intr\" interrupt\n");
if (pp->irq < 0)
return pp->irq;
}
pcie->bpmp = tegra_bpmp_get(dev);
if (IS_ERR(pcie->bpmp))

3
drivers/pci/controller/dwc/pcie-uniphier.c
View File

@ -416,8 +416,7 @@ static int uniphier_pcie_probe(struct platform_device *pdev)
if (IS_ERR(priv->pci.dbi_base))
return PTR_ERR(priv->pci.dbi_base);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "link");
priv->base = devm_ioremap_resource(dev, res);
priv->base = devm_platform_ioremap_resource_byname(pdev, "link");
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);

5
drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c
View File

@ -170,10 +170,9 @@ static int ls_pcie_g4_interrupt_init(struct mobiveil_pcie *mv_pci)
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);
if (pcie->irq < 0)
return pcie->irq;
}
ret = devm_request_irq(dev, pcie->irq, ls_pcie_g4_isr,
IRQF_SHARED, pdev->name, pcie);
if (ret) {

41
drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
View File

@ -29,18 +29,15 @@
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 == rp->root_bus_nr) && (devfn > 0))
if (pci_is_root_bus(bus) && (devfn > 0))
return false;
/*
* Do not read more than one device on the bus directly
* attached to RC
*/
if ((bus->primary == rp->root_bus_nr) && (PCI_SLOT(devfn) > 0))
if ((bus->primary == to_pci_host_bridge(bus->bridge)->busnr) && (PCI_SLOT(devfn) > 0))
return false;
return true;
@ -61,7 +58,7 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus,
return NULL;
/* RC config access */
if (bus->number == rp->root_bus_nr)
if (pci_is_root_bus(bus))
return pcie->csr_axi_slave_base + where;
/*
@ -522,10 +519,8 @@ static int mobiveil_pcie_integrated_interrupt_init(struct mobiveil_pcie *pcie)
mobiveil_pcie_enable_msi(pcie);
rp->irq = platform_get_irq(pdev, 0);
if (rp->irq < 0) {
dev_err(dev, "failed to map IRQ: %d\n", rp->irq);
if (rp->irq < 0)
return rp->irq;
}
/* initialize the IRQ domains */
ret = mobiveil_pcie_init_irq_domain(pcie);
@ -569,8 +564,6 @@ 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);
@ -582,14 +575,6 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie)
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);
if (ret) {
dev_err(dev, "Getting bridge resources failed\n");
return ret;
}
/*
* configure all inbound and outbound windows and prepare the RC for
* config access
@ -607,12 +592,8 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie)
}
/* Initialize bridge */
bridge->dev.parent = dev;
bridge->sysdata = pcie;
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;
ret = mobiveil_bringup_link(pcie);
if (ret) {
@ -620,17 +601,5 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie)
return ret;
}
/* setup the kernel resources for the newly added PCIe root bus */
ret = pci_scan_root_bus_bridge(bridge);
if (ret)
return ret;
bus = bridge->bus;
pci_assign_unassigned_bus_resources(bus);
list_for_each_entry(child, &bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(bus);
return 0;
return pci_host_probe(bridge);
}

1
drivers/pci/controller/mobiveil/pcie-mobiveil.h
View File

@ -149,7 +149,6 @@ struct mobiveil_rp_ops {
};
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;

38
drivers/pci/controller/pci-aardvark.c
View File

@ -195,7 +195,6 @@ struct advk_pcie {
DECLARE_BITMAP(msi_used, MSI_IRQ_NUM);
struct mutex msi_used_lock;
u16 msi_msg;
int root_bus_nr;
int link_gen;
struct pci_bridge_emul bridge;
struct gpio_desc *reset_gpio;
@ -641,7 +640,14 @@ static void advk_sw_pci_bridge_init(struct advk_pcie *pcie)
static bool advk_pcie_valid_device(struct advk_pcie *pcie, struct pci_bus *bus,
int devfn)
{
if ((bus->number == pcie->root_bus_nr) && PCI_SLOT(devfn) != 0)
if (pci_is_root_bus(bus) && PCI_SLOT(devfn) != 0)
return false;
/*
* If the link goes down after we check for link-up, nothing bad
* happens but the config access times out.
*/
if (!pci_is_root_bus(bus) && !advk_pcie_link_up(pcie))
return false;
return true;
@ -659,7 +665,7 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn,
return PCIBIOS_DEVICE_NOT_FOUND;
}
if (bus->number == pcie->root_bus_nr)
if (pci_is_root_bus(bus))
return pci_bridge_emul_conf_read(&pcie->bridge, where,
size, val);
@ -670,7 +676,7 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn,
/* Program the control register */
reg = advk_readl(pcie, PIO_CTRL);
reg &= ~PIO_CTRL_TYPE_MASK;
if (bus->primary == pcie->root_bus_nr)
if (pci_is_root_bus(bus->parent))
reg |= PCIE_CONFIG_RD_TYPE0;
else
reg |= PCIE_CONFIG_RD_TYPE1;
@ -688,8 +694,10 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn,
advk_writel(pcie, 1, PIO_START);
ret = advk_pcie_wait_pio(pcie);
if (ret < 0)
if (ret < 0) {
*val = 0xffffffff;
return PCIBIOS_SET_FAILED;
}
advk_pcie_check_pio_status(pcie);
@ -715,7 +723,7 @@ static int advk_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
if (!advk_pcie_valid_device(pcie, bus, devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
if (bus->number == pcie->root_bus_nr)
if (pci_is_root_bus(bus))
return pci_bridge_emul_conf_write(&pcie->bridge, where,
size, val);
@ -729,7 +737,7 @@ static int advk_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
/* Program the control register */
reg = advk_readl(pcie, PIO_CTRL);
reg &= ~PIO_CTRL_TYPE_MASK;
if (bus->primary == pcie->root_bus_nr)
if (pci_is_root_bus(bus->parent))
reg |= PCIE_CONFIG_WR_TYPE0;
else
reg |= PCIE_CONFIG_WR_TYPE1;
@ -1105,7 +1113,6 @@ static int advk_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct advk_pcie *pcie;
struct resource *res, *bus;
struct pci_host_bridge *bridge;
int ret, irq;
@ -1116,8 +1123,7 @@ static int advk_pcie_probe(struct platform_device *pdev)
pcie = pci_host_bridge_priv(bridge);
pcie->pdev = pdev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pcie->base = devm_ioremap_resource(dev, res);
pcie->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(pcie->base))
return PTR_ERR(pcie->base);
@ -1133,14 +1139,6 @@ static int advk_pcie_probe(struct platform_device *pdev)
return ret;
}
ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
&bridge->dma_ranges, &bus);
if (ret) {
dev_err(dev, "Failed to parse resources\n");
return ret;
}
pcie->root_bus_nr = bus->start;
pcie->reset_gpio = devm_gpiod_get_from_of_node(dev, dev->of_node,
"reset-gpios", 0,
GPIOD_OUT_LOW,
@ -1184,12 +1182,8 @@ static int advk_pcie_probe(struct platform_device *pdev)
return ret;
}
bridge->dev.parent = dev;
bridge->sysdata = pcie;
bridge->busnr = 0;
bridge->ops = &advk_pcie_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
ret = pci_host_probe(bridge);
if (ret < 0) {

14
drivers/pci/controller/pci-ftpci100.c
View File

@ -422,7 +422,6 @@ static int faraday_pci_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
const struct faraday_pci_variant *variant =
of_device_get_match_data(dev);
struct resource *regs;
struct resource_entry *win;
struct faraday_pci *p;
struct resource *io;
@ -437,12 +436,7 @@ static int faraday_pci_probe(struct platform_device *pdev)
if (!host)
return -ENOMEM;
host->dev.parent = dev;
host->ops = &faraday_pci_ops;
host->busnr = 0;
host->msi = NULL;
host->map_irq = of_irq_parse_and_map_pci;
host->swizzle_irq = pci_common_swizzle;
p = pci_host_bridge_priv(host);
host->sysdata = p;
p->dev = dev;
@ -465,16 +459,10 @@ static int faraday_pci_probe(struct platform_device *pdev)
return ret;
}
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
p->base = devm_ioremap_resource(dev, regs);
p->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(p->base))
return PTR_ERR(p->base);
ret = pci_parse_request_of_pci_ranges(dev, &host->windows,
&host->dma_ranges, NULL);
if (ret)
return ret;
win = resource_list_first_type(&host->windows, IORESOURCE_IO);
if (win) {
io = win->res;

57
drivers/pci/controller/pci-host-common.c
View File

@ -21,39 +21,32 @@ static void gen_pci_unmap_cfg(void *ptr)
}
static struct pci_config_window *gen_pci_init(struct device *dev,
struct list_head *resources, const struct pci_ecam_ops *ops)
struct pci_host_bridge *bridge, const struct pci_ecam_ops *ops)
{
int err;
struct resource cfgres;
struct resource *bus_range = NULL;
struct resource_entry *bus;
struct pci_config_window *cfg;
/* Parse our PCI ranges and request their resources */
err = pci_parse_request_of_pci_ranges(dev, resources, NULL, &bus_range);
if (err)
return ERR_PTR(err);
err = of_address_to_resource(dev->of_node, 0, &cfgres);
if (err) {
dev_err(dev, "missing \"reg\" property\n");
goto err_out;
return ERR_PTR(err);
}
cfg = pci_ecam_create(dev, &cfgres, bus_range, ops);
if (IS_ERR(cfg)) {
err = PTR_ERR(cfg);
goto err_out;
}
bus = resource_list_first_type(&bridge->windows, IORESOURCE_BUS);
if (!bus)
return ERR_PTR(-ENODEV);
cfg = pci_ecam_create(dev, &cfgres, bus->res, ops);
if (IS_ERR(cfg))
return cfg;
err = devm_add_action_or_reset(dev, gen_pci_unmap_cfg, cfg);
if (err) {
goto err_out;
}
return cfg;
if (err)
return ERR_PTR(err);
err_out:
pci_free_resource_list(resources);
return ERR_PTR(err);
return cfg;
}
int pci_host_common_probe(struct platform_device *pdev)
@ -61,9 +54,7 @@ int pci_host_common_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct pci_host_bridge *bridge;
struct pci_config_window *cfg;
struct list_head resources;
const struct pci_ecam_ops *ops;
int ret;
ops = of_device_get_match_data(&pdev->dev);
if (!ops)
@ -76,7 +67,7 @@ int pci_host_common_probe(struct platform_device *pdev)
of_pci_check_probe_only();
/* Parse and map our Configuration Space windows */
cfg = gen_pci_init(dev, &resources, ops);
cfg = gen_pci_init(dev, bridge, ops);
if (IS_ERR(cfg))
return PTR_ERR(cfg);
@ -84,32 +75,22 @@ int pci_host_common_probe(struct platform_device *pdev)
if (!pci_has_flag(PCI_PROBE_ONLY))
pci_add_flags(PCI_REASSIGN_ALL_BUS);
list_splice_init(&resources, &bridge->windows);
bridge->dev.parent = dev;
bridge->sysdata = cfg;
bridge->busnr = cfg->busr.start;
bridge->ops = (struct pci_ops *)&ops->pci_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
ret = pci_host_probe(bridge);
if (ret < 0) {
pci_free_resource_list(&resources);
return ret;
}
platform_set_drvdata(pdev, bridge);
platform_set_drvdata(pdev, bridge->bus);
return 0;
return pci_host_probe(bridge);
}
EXPORT_SYMBOL_GPL(pci_host_common_probe);
int pci_host_common_remove(struct platform_device *pdev)
{
struct pci_bus *bus = platform_get_drvdata(pdev);
struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
pci_lock_rescan_remove();
pci_stop_root_bus(bus);
pci_remove_root_bus(bus);
pci_stop_root_bus(bridge->bus);
pci_remove_root_bus(bridge->bus);
pci_unlock_rescan_remove();
return 0;

86
drivers/pci/controller/pci-hyperv.c
View File

@ -938,8 +938,9 @@ out:
*
* Return: 0 on success, -errno on failure
*/
int hv_read_config_block(struct pci_dev *pdev, void *buf, unsigned int len,
unsigned int block_id, unsigned int *bytes_returned)
static int hv_read_config_block(struct pci_dev *pdev, void *buf,
unsigned int len, unsigned int block_id,
unsigned int *bytes_returned)
{
struct hv_pcibus_device *hbus =
container_of(pdev->bus->sysdata, struct hv_pcibus_device,
@ -1018,8 +1019,8 @@ static void hv_pci_write_config_compl(void *context, struct pci_response *resp,
*
* Return: 0 on success, -errno on failure
*/
int hv_write_config_block(struct pci_dev *pdev, void *buf, unsigned int len,
unsigned int block_id)
static int hv_write_config_block(struct pci_dev *pdev, void *buf,
unsigned int len, unsigned int block_id)
{
struct hv_pcibus_device *hbus =
container_of(pdev->bus->sysdata, struct hv_pcibus_device,
@ -1087,9 +1088,9 @@ int hv_write_config_block(struct pci_dev *pdev, void *buf, unsigned int len,
*
* Return: 0 on success, -errno on failure
*/
int hv_register_block_invalidate(struct pci_dev *pdev, void *context,
void (*block_invalidate)(void *context,
u64 block_mask))
static int hv_register_block_invalidate(struct pci_dev *pdev, void *context,
void (*block_invalidate)(void *context,
u64 block_mask))
{
struct hv_pcibus_device *hbus =
container_of(pdev->bus->sysdata, struct hv_pcibus_device,
@ -2759,10 +2760,8 @@ static int hv_pci_enter_d0(struct hv_device *hdev)
struct pci_bus_d0_entry *d0_entry;
struct hv_pci_compl comp_pkt;
struct pci_packet *pkt;
bool retry = true;
int ret;
enter_d0_retry:
/*
* Tell the host that the bus is ready to use, and moved into the
* powered-on state. This includes telling the host which region
@ -2789,38 +2788,6 @@ enter_d0_retry:
if (ret)
goto exit;
/*
* In certain case (Kdump) the pci device of interest was
* not cleanly shut down and resource is still held on host
* side, the host could return invalid device status.
* We need to explicitly request host to release the resource
* and try to enter D0 again.
*/
if (comp_pkt.completion_status < 0 && retry) {
retry = false;
dev_err(&hdev->device, "Retrying D0 Entry\n");
/*
* Hv_pci_bus_exit() calls hv_send_resource_released()
* to free up resources of its child devices.
* In the kdump kernel we need to set the
* wslot_res_allocated to 255 so it scans all child
* devices to release resources allocated in the
* normal kernel before panic happened.
*/
hbus->wslot_res_allocated = 255;
ret = hv_pci_bus_exit(hdev, true);
if (ret == 0) {
kfree(pkt);
goto enter_d0_retry;
}
dev_err(&hdev->device,
"Retrying D0 failed with ret %d\n", ret);
}
if (comp_pkt.completion_status < 0) {
dev_err(&hdev->device,
"PCI Pass-through VSP failed D0 Entry with status %x\n",
@ -3058,6 +3025,7 @@ static int hv_pci_probe(struct hv_device *hdev,
struct hv_pcibus_device *hbus;
u16 dom_req, dom;
char *name;
bool enter_d0_retry = true;
int ret;
/*
@ -3178,11 +3146,47 @@ static int hv_pci_probe(struct hv_device *hdev,
if (ret)
goto free_fwnode;
retry:
ret = hv_pci_query_relations(hdev);
if (ret)
goto free_irq_domain;
ret = hv_pci_enter_d0(hdev);
/*
* In certain case (Kdump) the pci device of interest was
* not cleanly shut down and resource is still held on host
* side, the host could return invalid device status.
* We need to explicitly request host to release the resource
* and try to enter D0 again.
* Since the hv_pci_bus_exit() call releases structures
* of all its child devices, we need to start the retry from
* hv_pci_query_relations() call, requesting host to send
* the synchronous child device relations message before this
* information is needed in hv_send_resources_allocated()
* call later.
*/
if (ret == -EPROTO && enter_d0_retry) {
enter_d0_retry = false;
dev_err(&hdev->device, "Retrying D0 Entry\n");
/*
* Hv_pci_bus_exit() calls hv_send_resources_released()
* to free up resources of its child devices.
* In the kdump kernel we need to set the
* wslot_res_allocated to 255 so it scans all child
* devices to release resources allocated in the
* normal kernel before panic happened.
*/
hbus->wslot_res_allocated = 255;
ret = hv_pci_bus_exit(hdev, true);
if (ret == 0)
goto retry;
dev_err(&hdev->device,
"Retrying D0 failed with ret %d\n", ret);
}
if (ret)
goto free_irq_domain;

14
drivers/pci/controller/pci-loongson.c
View File

@ -37,11 +37,11 @@ static void bridge_class_quirk(struct pci_dev *dev)
{
dev->class = PCI_CLASS_BRIDGE_PCI << 8;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_LOONGSON,
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
DEV_PCIE_PORT_0, bridge_class_quirk);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_LOONGSON,
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
DEV_PCIE_PORT_1, bridge_class_quirk);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_LOONGSON,
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
DEV_PCIE_PORT_2, bridge_class_quirk);
static void system_bus_quirk(struct pci_dev *pdev)
@ -218,14 +218,6 @@ static int loongson_pci_probe(struct platform_device *pdev)
}
}
err = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
&bridge->dma_ranges, NULL);
if (err) {
dev_err(dev, "failed to get bridge resources\n");
return err;
}
bridge->dev.parent = dev;
bridge->sysdata = priv;
bridge->ops = &loongson_pci_ops;
bridge->map_irq = loongson_map_irq;

33
drivers/pci/controller/pci-mvebu.c
View File

@ -71,7 +71,6 @@ struct mvebu_pcie {
struct platform_device *pdev;
struct mvebu_pcie_port *ports;
struct msi_controller *msi;
struct list_head resources;
struct resource io;
struct resource realio;
struct resource mem;
@ -105,6 +104,7 @@ struct mvebu_pcie_port {
struct mvebu_pcie_window memwin;
struct mvebu_pcie_window iowin;
u32 saved_pcie_stat;
struct resource regs;
};
static inline void mvebu_writel(struct mvebu_pcie_port *port, u32 val, u32 reg)
@ -149,7 +149,9 @@ static void mvebu_pcie_set_local_dev_nr(struct mvebu_pcie_port *port, int nr)
/*
* Setup PCIE BARs and Address Decode Wins:
* BAR[0,2] -> disabled, BAR[1] -> covers all DRAM banks
* BAR[0] -> internal registers (needed for MSI)
* BAR[1] -> covers all DRAM banks
* BAR[2] -> Disabled
* WIN[0-3] -> DRAM bank[0-3]
*/
static void mvebu_pcie_setup_wins(struct mvebu_pcie_port *port)
@ -203,6 +205,12 @@ static void mvebu_pcie_setup_wins(struct mvebu_pcie_port *port)
mvebu_writel(port, 0, PCIE_BAR_HI_OFF(1));
mvebu_writel(port, ((size - 1) & 0xffff0000) | 1,
PCIE_BAR_CTRL_OFF(1));
/*
* Point BAR[0] to the device's internal registers.
*/
mvebu_writel(port, round_down(port->regs.start, SZ_1M), PCIE_BAR_LO_OFF(0));
mvebu_writel(port, 0, PCIE_BAR_HI_OFF(0));
}
static void mvebu_pcie_setup_hw(struct mvebu_pcie_port *port)
@ -708,14 +716,13 @@ static void __iomem *mvebu_pcie_map_registers(struct platform_device *pdev,
struct device_node *np,
struct mvebu_pcie_port *port)
{
struct resource regs;
int ret = 0;
ret = of_address_to_resource(np, 0, &regs);
ret = of_address_to_resource(np, 0, &port->regs);
if (ret)
return (void __iomem *)ERR_PTR(ret);
return devm_ioremap_resource(&pdev->dev, &regs);
return devm_ioremap_resource(&pdev->dev, &port->regs);
}
#define DT_FLAGS_TO_TYPE(flags) (((flags) >> 24) & 0x03)
@ -961,17 +968,16 @@ static int mvebu_pcie_parse_request_resources(struct mvebu_pcie *pcie)
{
struct device *dev = &pcie->pdev->dev;
struct device_node *np = dev->of_node;
struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
int ret;
INIT_LIST_HEAD(&pcie->resources);
/* Get the bus range */
ret = of_pci_parse_bus_range(np, &pcie->busn);
if (ret) {
dev_err(dev, "failed to parse bus-range property: %d\n", ret);
return ret;
}
pci_add_resource(&pcie->resources, &pcie->busn);
pci_add_resource(&bridge->windows, &pcie->busn);
/* Get the PCIe memory aperture */
mvebu_mbus_get_pcie_mem_aperture(&pcie->mem);
@ -981,7 +987,7 @@ static int mvebu_pcie_parse_request_resources(struct mvebu_pcie *pcie)
}
pcie->mem.name = "PCI MEM";
pci_add_resource(&pcie->resources, &pcie->mem);
pci_add_resource(&bridge->windows, &pcie->mem);
/* Get the PCIe IO aperture */
mvebu_mbus_get_pcie_io_aperture(&pcie->io);
@ -994,10 +1000,10 @@ static int mvebu_pcie_parse_request_resources(struct mvebu_pcie *pcie)
resource_size(&pcie->io) - 1);
pcie->realio.name = "PCI I/O";
pci_add_resource(&pcie->resources, &pcie->realio);
pci_add_resource(&bridge->windows, &pcie->realio);
}
return devm_request_pci_bus_resources(dev, &pcie->resources);
return devm_request_pci_bus_resources(dev, &bridge->windows);
}
/*
@ -1118,13 +1124,8 @@ static int mvebu_pcie_probe(struct platform_device *pdev)
pcie->nports = i;
list_splice_init(&pcie->resources, &bridge->windows);
bridge->dev.parent = dev;
bridge->sysdata = pcie;
bridge->busnr = 0;
bridge->ops = &mvebu_pcie_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
bridge->align_resource = mvebu_pcie_align_resource;
bridge->msi = pcie->msi;

162
drivers/pci/controller/pci-rcar-gen2.c
View File

@ -98,22 +98,17 @@ struct rcar_pci_priv {
void __iomem *reg;
struct resource mem_res;
struct resource *cfg_res;
unsigned busnr;
int irq;
unsigned long window_size;
unsigned long window_addr;
unsigned long window_pci;
};
/* PCI configuration space operations */
static void __iomem *rcar_pci_cfg_base(struct pci_bus *bus, unsigned int devfn,
int where)
{
struct pci_sys_data *sys = bus->sysdata;
struct rcar_pci_priv *priv = sys->private_data;
struct rcar_pci_priv *priv = bus->sysdata;
int slot, val;
if (sys->busnr != bus->number || PCI_FUNC(devfn))
if (!pci_is_root_bus(bus) || PCI_FUNC(devfn))
return NULL;
/* Only one EHCI/OHCI device built-in */
@ -132,20 +127,6 @@ static void __iomem *rcar_pci_cfg_base(struct pci_bus *bus, unsigned int devfn,
return priv->reg + (slot >> 1) * 0x100 + where;
}
/* PCI interrupt mapping */
static int rcar_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct pci_sys_data *sys = dev->bus->sysdata;
struct rcar_pci_priv *priv = sys->private_data;
int irq;
irq = of_irq_parse_and_map_pci(dev, slot, pin);
if (!irq)
irq = priv->irq;
return irq;
}
#ifdef CONFIG_PCI_DEBUG
/* if debug enabled, then attach an error handler irq to the bridge */
@ -189,19 +170,33 @@ static inline void rcar_pci_setup_errirq(struct rcar_pci_priv *priv) { }
#endif
/* PCI host controller setup */
static int rcar_pci_setup(int nr, struct pci_sys_data *sys)
static void rcar_pci_setup(struct rcar_pci_priv *priv)
{
struct rcar_pci_priv *priv = sys->private_data;
struct pci_host_bridge *bridge = pci_host_bridge_from_priv(priv);
struct device *dev = priv->dev;
void __iomem *reg = priv->reg;
struct resource_entry *entry;
unsigned long window_size;
unsigned long window_addr;
unsigned long window_pci;
u32 val;
int ret;
entry = resource_list_first_type(&bridge->dma_ranges, IORESOURCE_MEM);
if (!entry) {
window_addr = 0x40000000;
window_pci = 0x40000000;
window_size = SZ_1G;
} else {
window_addr = entry->res->start;
window_pci = entry->res->start - entry->offset;
window_size = resource_size(entry->res);
}
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
val = ioread32(reg + RCAR_PCI_UNIT_REV_REG);
dev_info(dev, "PCI: bus%u revision %x\n", sys->busnr, val);
dev_info(dev, "PCI: revision %x\n", val);
/* Disable Direct Power Down State and assert reset */
val = ioread32(reg + RCAR_USBCTR_REG) & ~RCAR_USBCTR_DIRPD;
@ -214,7 +209,7 @@ static int rcar_pci_setup(int nr, struct pci_sys_data *sys)
RCAR_USBCTR_USBH_RST | RCAR_USBCTR_PLL_RST);
/* Setup PCIAHB window1 size */
switch (priv->window_size) {
switch (window_size) {
case SZ_2G:
val |= RCAR_USBCTR_PCIAHB_WIN1_2G;
break;
@ -226,8 +221,8 @@ static int rcar_pci_setup(int nr, struct pci_sys_data *sys)
break;
default:
pr_warn("unknown window size %ld - defaulting to 256M\n",
priv->window_size);
priv->window_size = SZ_256M;
window_size);
window_size = SZ_256M;
/* fall-through */
case SZ_256M:
val |= RCAR_USBCTR_PCIAHB_WIN1_256M;
@ -245,7 +240,7 @@ static int rcar_pci_setup(int nr, struct pci_sys_data *sys)
iowrite32(val, reg + RCAR_PCI_ARBITER_CTR_REG);
/* PCI-AHB mapping */
iowrite32(priv->window_addr | RCAR_PCIAHB_PREFETCH16,
iowrite32(window_addr | RCAR_PCIAHB_PREFETCH16,
reg + RCAR_PCIAHB_WIN1_CTR_REG);
/* AHB-PCI mapping: OHCI/EHCI registers */
@ -256,7 +251,7 @@ static int rcar_pci_setup(int nr, struct pci_sys_data *sys)
iowrite32(RCAR_AHBPCI_WIN1_HOST | RCAR_AHBPCI_WIN_CTR_CFG,
reg + RCAR_AHBPCI_WIN1_CTR_REG);
/* Set PCI-AHB Window1 address */
iowrite32(priv->window_pci | PCI_BASE_ADDRESS_MEM_PREFETCH,
iowrite32(window_pci | PCI_BASE_ADDRESS_MEM_PREFETCH,
reg + PCI_BASE_ADDRESS_1);
/* Set AHB-PCI bridge PCI communication area address */
val = priv->cfg_res->start + RCAR_AHBPCI_PCICOM_OFFSET;
@ -271,18 +266,7 @@ static int rcar_pci_setup(int nr, struct pci_sys_data *sys)
iowrite32(RCAR_PCI_INT_A | RCAR_PCI_INT_B | RCAR_PCI_INT_PME,
reg + RCAR_PCI_INT_ENABLE_REG);
if (priv->irq > 0)
rcar_pci_setup_errirq(priv);
/* Add PCI resources */
pci_add_resource(&sys->resources, &priv->mem_res);
ret = devm_request_pci_bus_resources(dev, &sys->resources);
if (ret < 0)
return ret;
/* Setup bus number based on platform device id / of bus-range */
sys->busnr = priv->busnr;
return 1;
rcar_pci_setup_errirq(priv);
}
static struct pci_ops rcar_pci_ops = {
@ -291,55 +275,20 @@ static struct pci_ops rcar_pci_ops = {
.write = pci_generic_config_write,
};
static int rcar_pci_parse_map_dma_ranges(struct rcar_pci_priv *pci,
struct device_node *np)
{
struct device *dev = pci->dev;
struct of_pci_range range;
struct of_pci_range_parser parser;
int index = 0;
/* Failure to parse is ok as we fall back to defaults */
if (of_pci_dma_range_parser_init(&parser, np))
return 0;
/* Get the dma-ranges from DT */
for_each_of_pci_range(&parser, &range) {
/* Hardware only allows one inbound 32-bit range */
if (index)
return -EINVAL;
pci->window_addr = (unsigned long)range.cpu_addr;
pci->window_pci = (unsigned long)range.pci_addr;
pci->window_size = (unsigned long)range.size;
/* Catch HW limitations */
if (!(range.flags & IORESOURCE_PREFETCH)) {
dev_err(dev, "window must be prefetchable\n");
return -EINVAL;
}
if (pci->window_addr) {
u32 lowaddr = 1 << (ffs(pci->window_addr) - 1);
if (lowaddr < pci->window_size) {
dev_err(dev, "invalid window size/addr\n");
return -EINVAL;
}
}
index++;
}
return 0;
}
static int rcar_pci_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *cfg_res, *mem_res;
struct rcar_pci_priv *priv;
struct pci_host_bridge *bridge;
void __iomem *reg;
struct hw_pci hw;
void *hw_private[1];
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*priv));
if (!bridge)
return -ENOMEM;
priv = pci_host_bridge_priv(bridge);
bridge->sysdata = priv;
cfg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
reg = devm_ioremap_resource(dev, cfg_res);
@ -353,10 +302,6 @@ static int rcar_pci_probe(struct platform_device *pdev)
if (mem_res->start & 0xFFFF)
return -EINVAL;
priv = devm_kzalloc(dev, sizeof(struct rcar_pci_priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->mem_res = *mem_res;
priv->cfg_res = cfg_res;
@ -369,44 +314,13 @@ static int rcar_pci_probe(struct platform_device *pdev)
return priv->irq;
}
/* default window addr and size if not specified in DT */
priv->window_addr = 0x40000000;
priv->window_pci = 0x40000000;
priv->window_size = SZ_1G;
bridge->ops = &rcar_pci_ops;
if (dev->of_node) {
struct resource busnr;
int ret;
pci_add_flags(PCI_REASSIGN_ALL_BUS);
ret = of_pci_parse_bus_range(dev->of_node, &busnr);
if (ret < 0) {
dev_err(dev, "failed to parse bus-range\n");
return ret;
}
rcar_pci_setup(priv);
priv->busnr = busnr.start;
if (busnr.end != busnr.start)
dev_warn(dev, "only one bus number supported\n");
ret = rcar_pci_parse_map_dma_ranges(priv, dev->of_node);
if (ret < 0) {
dev_err(dev, "failed to parse dma-range\n");
return ret;
}
} else {
priv->busnr = pdev->id;
}
hw_private[0] = priv;
memset(&hw, 0, sizeof(hw));
hw.nr_controllers = ARRAY_SIZE(hw_private);
hw.io_optional = 1;
hw.private_data = hw_private;
hw.map_irq = rcar_pci_map_irq;
hw.ops = &rcar_pci_ops;
hw.setup = rcar_pci_setup;
pci_common_init_dev(dev, &hw);
return 0;
return pci_host_probe(bridge);
}
static const struct of_device_id rcar_pci_of_match[] = {

79
drivers/pci/controller/pci-tegra.c
View File

@ -181,13 +181,6 @@
#define AFI_PEXBIAS_CTRL_0 0x168
#define RP_PRIV_XP_DL 0x00000494
#define RP_PRIV_XP_DL_GEN2_UPD_FC_TSHOLD (0x1ff << 1)
#define RP_RX_HDR_LIMIT 0x00000e00
#define RP_RX_HDR_LIMIT_PW_MASK (0xff << 8)
#define RP_RX_HDR_LIMIT_PW (0x0e << 8)
#define RP_ECTL_2_R1 0x00000e84
#define RP_ECTL_2_R1_RX_CTLE_1C_MASK 0xffff
@ -323,7 +316,6 @@ struct tegra_pcie_soc {
bool program_uphy;
bool update_clamp_threshold;
bool program_deskew_time;
bool raw_violation_fixup;
bool update_fc_timer;
bool has_cache_bars;
struct {
@ -659,23 +651,6 @@ static void tegra_pcie_apply_sw_fixup(struct tegra_pcie_port *port)
writel(value, port->base + RP_VEND_CTL0);
}
/* Fixup for read after write violation. */
if (soc->raw_violation_fixup) {
value = readl(port->base + RP_RX_HDR_LIMIT);
value &= ~RP_RX_HDR_LIMIT_PW_MASK;
value |= RP_RX_HDR_LIMIT_PW;
writel(value, port->base + RP_RX_HDR_LIMIT);
value = readl(port->base + RP_PRIV_XP_DL);
value |= RP_PRIV_XP_DL_GEN2_UPD_FC_TSHOLD;
writel(value, port->base + RP_PRIV_XP_DL);
value = readl(port->base + RP_VEND_XP);
value &= ~RP_VEND_XP_UPDATE_FC_THRESHOLD_MASK;
value |= soc->update_fc_threshold;
writel(value, port->base + RP_VEND_XP);
}
if (soc->update_fc_timer) {
value = readl(port->base + RP_VEND_XP);
value &= ~RP_VEND_XP_UPDATE_FC_THRESHOLD_MASK;
@ -1462,7 +1437,7 @@ static int tegra_pcie_get_resources(struct tegra_pcie *pcie)
{
struct device *dev = pcie->dev;
struct platform_device *pdev = to_platform_device(dev);
struct resource *pads, *afi, *res;
struct resource *res;
const struct tegra_pcie_soc *soc = pcie->soc;
int err;
@ -1486,15 +1461,13 @@ static int tegra_pcie_get_resources(struct tegra_pcie *pcie)
}
}
pads = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pads");
pcie->pads = devm_ioremap_resource(dev, pads);
pcie->pads = devm_platform_ioremap_resource_byname(pdev, "pads");
if (IS_ERR(pcie->pads)) {
err = PTR_ERR(pcie->pads);
goto phys_put;
}
afi = platform_get_resource_byname(pdev, IORESOURCE_MEM, "afi");
pcie->afi = devm_ioremap_resource(dev, afi);
pcie->afi = devm_platform_ioremap_resource_byname(pdev, "afi");
if (IS_ERR(pcie->afi)) {
err = PTR_ERR(pcie->afi);
goto phys_put;
@ -1520,10 +1493,8 @@ static int tegra_pcie_get_resources(struct tegra_pcie *pcie)
/* request interrupt */
err = platform_get_irq_byname(pdev, "intr");
if (err < 0) {
dev_err(dev, "failed to get IRQ: %d\n", err);
if (err < 0)
goto phys_put;
}
pcie->irq = err;
@ -1738,10 +1709,8 @@ static int tegra_pcie_msi_setup(struct tegra_pcie *pcie)
}
err = platform_get_irq_byname(pdev, "msi");
if (err < 0) {
dev_err(dev, "failed to get IRQ: %d\n", err);
if (err < 0)
goto free_irq_domain;
}
msi->irq = err;
@ -2025,7 +1994,7 @@ static int tegra_pcie_get_regulators(struct tegra_pcie *pcie, u32 lane_mask)
pcie->supplies[i++].supply = "hvdd-pex";
pcie->supplies[i++].supply = "vddio-pexctl-aud";
} else if (of_device_is_compatible(np, "nvidia,tegra210-pcie")) {
pcie->num_supplies = 6;
pcie->num_supplies = 3;
pcie->supplies = devm_kcalloc(pcie->dev, pcie->num_supplies,
sizeof(*pcie->supplies),
@ -2033,14 +2002,11 @@ static int tegra_pcie_get_regulators(struct tegra_pcie *pcie, u32 lane_mask)
if (!pcie->supplies)
return -ENOMEM;
pcie->supplies[i++].supply = "avdd-pll-uerefe";
pcie->supplies[i++].supply = "hvddio-pex";
pcie->supplies[i++].supply = "dvddio-pex";
pcie->supplies[i++].supply = "dvdd-pex-pll";
pcie->supplies[i++].supply = "hvdd-pex-pll-e";
pcie->supplies[i++].supply = "vddio-pex-ctl";
} else if (of_device_is_compatible(np, "nvidia,tegra124-pcie")) {
pcie->num_supplies = 7;
pcie->num_supplies = 4;
pcie->supplies = devm_kcalloc(dev, pcie->num_supplies,
sizeof(*pcie->supplies),
@ -2050,11 +2016,8 @@ static int tegra_pcie_get_regulators(struct tegra_pcie *pcie, u32 lane_mask)
pcie->supplies[i++].supply = "avddio-pex";
pcie->supplies[i++].supply = "dvddio-pex";
pcie->supplies[i++].supply = "avdd-pex-pll";
pcie->supplies[i++].supply = "hvdd-pex";
pcie->supplies[i++].supply = "hvdd-pex-pll-e";
pcie->supplies[i++].supply = "vddio-pex-ctl";
pcie->supplies[i++].supply = "avdd-pll-erefe";
} else if (of_device_is_compatible(np, "nvidia,tegra30-pcie")) {
bool need_pexa = false, need_pexb = false;
@ -2416,7 +2379,6 @@ static const struct tegra_pcie_soc tegra20_pcie = {
.program_uphy = true,
.update_clamp_threshold = false,
.program_deskew_time = false,
.raw_violation_fixup = false,
.update_fc_timer = false,
.has_cache_bars = true,
.ectl.enable = false,
@ -2446,7 +2408,6 @@ static const struct tegra_pcie_soc tegra30_pcie = {
.program_uphy = true,
.update_clamp_threshold = false,
.program_deskew_time = false,
.raw_violation_fixup = false,
.update_fc_timer = false,
.has_cache_bars = false,
.ectl.enable = false,
@ -2459,8 +2420,6 @@ static const struct tegra_pcie_soc tegra124_pcie = {
.pads_pll_ctl = PADS_PLL_CTL_TEGRA30,
.tx_ref_sel = PADS_PLL_CTL_TXCLKREF_BUF_EN,
.pads_refclk_cfg0 = 0x44ac44ac,
/* FC threshold is bit[25:18] */
.update_fc_threshold = 0x03fc0000,
.has_pex_clkreq_en = true,
.has_pex_bias_ctrl = true,
.has_intr_prsnt_sense = true,
@ -2470,7 +2429,6 @@ static const struct tegra_pcie_soc tegra124_pcie = {
.program_uphy = true,
.update_clamp_threshold = true,
.program_deskew_time = false,
.raw_violation_fixup = true,
.update_fc_timer = false,
.has_cache_bars = false,
.ectl.enable = false,
@ -2494,7 +2452,6 @@ static const struct tegra_pcie_soc tegra210_pcie = {
.program_uphy = true,
.update_clamp_threshold = true,
.program_deskew_time = true,
.raw_violation_fixup = false,
.update_fc_timer = true,
.has_cache_bars = false,
.ectl = {
@ -2536,7 +2493,6 @@ static const struct tegra_pcie_soc tegra186_pcie = {
.program_uphy = false,
.update_clamp_threshold = false,
.program_deskew_time = false,
.raw_violation_fixup = false,
.update_fc_timer = false,
.has_cache_bars = false,
.ectl.enable = false,
@ -2670,8 +2626,6 @@ static int tegra_pcie_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
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));
@ -2686,12 +2640,6 @@ 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;
@ -2715,26 +2663,15 @@ static int tegra_pcie_probe(struct platform_device *pdev)
goto pm_runtime_put;
}
host->busnr = bus->start;
host->dev.parent = &pdev->dev;
host->ops = &tegra_pcie_ops;
host->map_irq = tegra_pcie_map_irq;
host->swizzle_irq = pci_common_swizzle;
err = pci_scan_root_bus_bridge(host);
err = pci_host_probe(host);
if (err < 0) {
dev_err(dev, "failed to register host: %d\n", err);
goto pm_runtime_put;
}
pci_bus_size_bridges(host->bus);
pci_bus_assign_resources(host->bus);
list_for_each_entry(child, &host->bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(host->bus);
if (IS_ENABLED(CONFIG_DEBUG_FS)) {
err = tegra_pcie_debugfs_init(pcie);
if (err < 0)

30
drivers/pci/controller/pci-v3-semi.c
View File

@ -239,7 +239,6 @@ struct v3_pci {
struct device *dev;
void __iomem *base;
void __iomem *config_base;
struct pci_bus *bus;
u32 config_mem;
u32 non_pre_mem;
u32 pre_mem;
@ -585,8 +584,6 @@ static int v3_pci_setup_resource(struct v3_pci *v3,
}
break;
case IORESOURCE_BUS:
dev_dbg(dev, "BUS %pR\n", win->res);
host->busnr = win->res->start;
break;
default:
dev_info(dev, "Unknown resource type %lu\n",
@ -724,12 +721,7 @@ static int v3_pci_probe(struct platform_device *pdev)
if (!host)
return -ENOMEM;
host->dev.parent = dev;
host->ops = &v3_pci_ops;
host->busnr = 0;
host->msi = NULL;
host->map_irq = of_irq_parse_and_map_pci;
host->swizzle_irq = pci_common_swizzle;
v3 = pci_host_bridge_priv(host);
host->sysdata = v3;
v3->dev = dev;
@ -770,17 +762,11 @@ static int v3_pci_probe(struct platform_device *pdev)
if (IS_ERR(v3->config_base))
return PTR_ERR(v3->config_base);
ret = pci_parse_request_of_pci_ranges(dev, &host->windows,
&host->dma_ranges, NULL);
if (ret)
return ret;
/* Get and request error IRQ resource */
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(dev, "unable to obtain PCIv3 error IRQ\n");
if (irq < 0)
return irq;
}
ret = devm_request_irq(dev, irq, v3_irq, 0,
"PCIv3 error", v3);
if (ret < 0) {
@ -904,17 +890,7 @@ static int v3_pci_probe(struct platform_device *pdev)
val |= V3_SYSTEM_M_LOCK;
writew(val, v3->base + V3_SYSTEM);
ret = pci_scan_root_bus_bridge(host);
if (ret) {
dev_err(dev, "failed to register host: %d\n", ret);
return ret;
}
v3->bus = host->bus;
pci_bus_assign_resources(v3->bus);
pci_bus_add_devices(v3->bus);
return 0;
return pci_host_probe(host);
}
static const struct of_device_id v3_pci_of_match[] = {

33
drivers/pci/controller/pci-versatile.c
View File

@ -67,23 +67,20 @@ static int versatile_pci_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct resource *res;
struct resource_entry *entry;
int ret, i, myslot = -1, mem = 1;
int i, myslot = -1, mem = 1;
u32 val;
void __iomem *local_pci_cfg_base;
struct pci_bus *bus, *child;
struct pci_host_bridge *bridge;
bridge = devm_pci_alloc_host_bridge(dev, 0);
if (!bridge)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
versatile_pci_base = devm_ioremap_resource(dev, res);
versatile_pci_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(versatile_pci_base))
return PTR_ERR(versatile_pci_base);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
versatile_cfg_base[0] = devm_ioremap_resource(dev, res);
versatile_cfg_base[0] = devm_platform_ioremap_resource(pdev, 1);
if (IS_ERR(versatile_cfg_base[0]))
return PTR_ERR(versatile_cfg_base[0]);
@ -92,11 +89,6 @@ static int versatile_pci_probe(struct platform_device *pdev)
if (IS_ERR(versatile_cfg_base[1]))
return PTR_ERR(versatile_cfg_base[1]);
ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
NULL, NULL);
if (ret)
return ret;
resource_list_for_each_entry(entry, &bridge->windows) {
if (resource_type(entry->res) == IORESOURCE_MEM) {
writel(entry->res->start >> 28, PCI_IMAP(mem));
@ -154,28 +146,11 @@ static int versatile_pci_probe(struct platform_device *pdev)
*/
writel(0, versatile_cfg_base[0] + PCI_INTERRUPT_LINE);
pci_add_flags(PCI_ENABLE_PROC_DOMAINS);
pci_add_flags(PCI_REASSIGN_ALL_BUS);
bridge->dev.parent = dev;
bridge->sysdata = NULL;
bridge->busnr = 0;
bridge->ops = &pci_versatile_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
ret = pci_scan_root_bus_bridge(bridge);
if (ret < 0)
return ret;
bus = bridge->bus;
pci_assign_unassigned_bus_resources(bus);
list_for_each_entry(child, &bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(bus);
return 0;
return pci_host_probe(bridge);
}
static const struct of_device_id versatile_pci_of_match[] = {

2
drivers/pci/controller/pci-xgene-msi.c
View File

@ -478,8 +478,6 @@ static int xgene_msi_probe(struct platform_device *pdev)
for (irq_index = 0; irq_index < NR_HW_IRQS; irq_index++) {
virt_msir = platform_get_irq(pdev, irq_index);
if (virt_msir < 0) {
dev_err(&pdev->dev, "Cannot translate IRQ index %d\n",
irq_index);
rc = virt_msir;
goto error;
}

25
drivers/pci/controller/pci-xgene.c
View File

@ -355,8 +355,7 @@ static int xgene_pcie_map_reg(struct xgene_pcie_port *port,
if (IS_ERR(port->csr_base))
return PTR_ERR(port->csr_base);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
port->cfg_base = devm_ioremap_resource(dev, res);
port->cfg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
if (IS_ERR(port->cfg_base))
return PTR_ERR(port->cfg_base);
port->cfg_addr = res->start;
@ -591,7 +590,6 @@ static int xgene_pcie_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct device_node *dn = dev->of_node;
struct xgene_pcie_port *port;
struct pci_bus *bus, *child;
struct pci_host_bridge *bridge;
int ret;
@ -616,33 +614,14 @@ static int xgene_pcie_probe(struct platform_device *pdev)
if (ret)
return ret;
ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
&bridge->dma_ranges, NULL);
if (ret)
return ret;
ret = xgene_pcie_setup(port);
if (ret)
return ret;
bridge->dev.parent = dev;
bridge->sysdata = port;
bridge->busnr = 0;
bridge->ops = &xgene_pcie_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
ret = pci_scan_root_bus_bridge(bridge);
if (ret < 0)
return ret;
bus = bridge->bus;
pci_assign_unassigned_bus_resources(bus);
list_for_each_entry(child, &bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(bus);
return 0;
return pci_host_probe(bridge);
}
static const struct of_device_id xgene_pcie_match_table[] = {

4
drivers/pci/controller/pcie-altera-msi.c
View File

@ -228,8 +228,7 @@ static int altera_msi_probe(struct platform_device *pdev)
mutex_init(&msi->lock);
msi->pdev = pdev;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "csr");
msi->csr_base = devm_ioremap_resource(&pdev->dev, res);
msi->csr_base = devm_platform_ioremap_resource_byname(pdev, "csr");
if (IS_ERR(msi->csr_base)) {
dev_err(&pdev->dev, "failed to map csr memory\n");
return PTR_ERR(msi->csr_base);
@ -256,7 +255,6 @@ static int altera_msi_probe(struct platform_device *pdev)
msi->irq = platform_get_irq(pdev, 0);
if (msi->irq < 0) {
dev_err(&pdev->dev, "failed to map IRQ: %d\n", msi->irq);
ret = msi->irq;
goto err;
}

41
drivers/pci/controller/pcie-altera.c
View File

@ -694,29 +694,23 @@ static void altera_pcie_irq_teardown(struct altera_pcie *pcie)
static int altera_pcie_parse_dt(struct altera_pcie *pcie)
{
struct device *dev = &pcie->pdev->dev;
struct platform_device *pdev = pcie->pdev;
struct resource *cra;
struct resource *hip;
cra = platform_get_resource_byname(pdev, IORESOURCE_MEM, "Cra");
pcie->cra_base = devm_ioremap_resource(dev, cra);
pcie->cra_base = devm_platform_ioremap_resource_byname(pdev, "Cra");
if (IS_ERR(pcie->cra_base))
return PTR_ERR(pcie->cra_base);
if (pcie->pcie_data->version == ALTERA_PCIE_V2) {
hip = platform_get_resource_byname(pdev, IORESOURCE_MEM, "Hip");
pcie->hip_base = devm_ioremap_resource(&pdev->dev, hip);
pcie->hip_base =
devm_platform_ioremap_resource_byname(pdev, "Hip");
if (IS_ERR(pcie->hip_base))
return PTR_ERR(pcie->hip_base);
}
/* setup IRQ */
pcie->irq = platform_get_irq(pdev, 0);
if (pcie->irq < 0) {
dev_err(dev, "failed to get IRQ: %d\n", pcie->irq);
if (pcie->irq < 0)
return pcie->irq;
}
irq_set_chained_handler_and_data(pcie->irq, altera_pcie_isr, pcie);
return 0;
@ -773,8 +767,6 @@ static int altera_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct altera_pcie *pcie;
struct pci_bus *bus;
struct pci_bus *child;
struct pci_host_bridge *bridge;
int ret;
const struct of_device_id *match;
@ -799,13 +791,6 @@ static int altera_pcie_probe(struct platform_device *pdev)
return ret;
}
ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
&bridge->dma_ranges, NULL);
if (ret) {
dev_err(dev, "Failed add resources\n");
return ret;
}
ret = altera_pcie_init_irq_domain(pcie);
if (ret) {
dev_err(dev, "Failed creating IRQ Domain\n");
@ -818,27 +803,11 @@ static int altera_pcie_probe(struct platform_device *pdev)
cra_writel(pcie, P2A_INT_ENA_ALL, P2A_INT_ENABLE);
altera_pcie_host_init(pcie);
bridge->dev.parent = dev;
bridge->sysdata = pcie;
bridge->busnr = pcie->root_bus_nr;
bridge->ops = &altera_pcie_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
ret = pci_scan_root_bus_bridge(bridge);
if (ret < 0)
return ret;
bus = bridge->bus;
pci_assign_unassigned_bus_resources(bus);
/* Configure PCI Express setting. */
list_for_each_entry(child, &bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(bus);
return ret;
return pci_host_probe(bridge);
}
static int altera_pcie_remove(struct platform_device *pdev)

33
drivers/pci/controller/pcie-brcmstb.c
View File

@ -172,7 +172,6 @@ struct brcm_pcie {
struct device *dev;
void __iomem *base;
struct clk *clk;
struct pci_bus *root_bus;
struct device_node *np;
bool ssc;
int gen;
@ -919,9 +918,10 @@ static void __brcm_pcie_remove(struct brcm_pcie *pcie)
static int brcm_pcie_remove(struct platform_device *pdev)
{
struct brcm_pcie *pcie = platform_get_drvdata(pdev);
struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
pci_stop_root_bus(pcie->root_bus);
pci_remove_root_bus(pcie->root_bus);
pci_stop_root_bus(bridge->bus);
pci_remove_root_bus(bridge->bus);
__brcm_pcie_remove(pcie);
return 0;
@ -933,8 +933,6 @@ static int brcm_pcie_probe(struct platform_device *pdev)
struct pci_host_bridge *bridge;
struct device_node *fw_np;
struct brcm_pcie *pcie;
struct pci_bus *child;
struct resource *res;
int ret;
/*
@ -959,8 +957,7 @@ static int brcm_pcie_probe(struct platform_device *pdev)
pcie->dev = &pdev->dev;
pcie->np = np;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pcie->base = devm_ioremap_resource(&pdev->dev, res);
pcie->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(pcie->base))
return PTR_ERR(pcie->base);
@ -973,11 +970,6 @@ static int brcm_pcie_probe(struct platform_device *pdev)
pcie->ssc = of_property_read_bool(np, "brcm,enable-ssc");
ret = pci_parse_request_of_pci_ranges(pcie->dev, &bridge->windows,
&bridge->dma_ranges, NULL);
if (ret)
return ret;
ret = clk_prepare_enable(pcie->clk);
if (ret) {
dev_err(&pdev->dev, "could not enable clock\n");
@ -997,27 +989,12 @@ static int brcm_pcie_probe(struct platform_device *pdev)
}
}
bridge->dev.parent = &pdev->dev;
bridge->busnr = 0;
bridge->ops = &brcm_pcie_ops;
bridge->sysdata = pcie;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
ret = pci_scan_root_bus_bridge(bridge);
if (ret < 0) {
dev_err(pcie->dev, "Scanning root bridge failed\n");
goto fail;
}
pci_assign_unassigned_bus_resources(bridge->bus);
list_for_each_entry(child, &bridge->bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(bridge->bus);
platform_set_drvdata(pdev, pcie);
pcie->root_bus = bridge->bus;
return 0;
return pci_host_probe(bridge);
fail:
__brcm_pcie_remove(pcie);
return ret;

10
drivers/pci/controller/pcie-iproc-platform.c
View File

@ -95,20 +95,14 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
if (IS_ERR(pcie->phy))
return PTR_ERR(pcie->phy);
ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
&bridge->dma_ranges, NULL);
if (ret) {
dev_err(dev, "unable to get PCI host bridge resources\n");
return ret;
}
/* PAXC doesn't support legacy IRQs, skip mapping */
switch (pcie->type) {
case IPROC_PCIE_PAXC:
case IPROC_PCIE_PAXC_V2:
pcie->map_irq = 0;
break;
default:
pcie->map_irq = of_irq_parse_and_map_pci;
break;
}
ret = iproc_pcie_setup(pcie, &bridge->windows);

21
drivers/pci/controller/pcie-iproc.c
View File

@ -1470,7 +1470,6 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
{
struct device *dev;
int ret;
struct pci_bus *child;
struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
dev = pcie->dev;
@ -1524,28 +1523,16 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
if (iproc_pcie_msi_enable(pcie))
dev_info(dev, "not using iProc MSI\n");
host->busnr = 0;
host->dev.parent = dev;
host->ops = &iproc_pcie_ops;
host->sysdata = pcie;
host->map_irq = pcie->map_irq;
host->swizzle_irq = pci_common_swizzle;
ret = pci_scan_root_bus_bridge(host);
ret = pci_host_probe(host);
if (ret < 0) {
dev_err(dev, "failed to scan host: %d\n", ret);
goto err_power_off_phy;
}
pci_assign_unassigned_bus_resources(host->bus);
pcie->root_bus = host->bus;
list_for_each_entry(child, &host->bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(host->bus);
return 0;
err_power_off_phy:
@ -1558,8 +1545,10 @@ EXPORT_SYMBOL(iproc_pcie_setup);
int iproc_pcie_remove(struct iproc_pcie *pcie)
{
pci_stop_root_bus(pcie->root_bus);
pci_remove_root_bus(pcie->root_bus);
struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
pci_stop_root_bus(host->bus);
pci_remove_root_bus(host->bus);
iproc_pcie_msi_disable(pcie);

2
drivers/pci/controller/pcie-iproc.h
View File

@ -54,7 +54,6 @@ struct iproc_msi;
* @reg_offsets: register offsets
* @base: PCIe host controller I/O register base
* @base_addr: PCIe host controller register base physical address
* @root_bus: pointer to root bus
* @phy: optional PHY device that controls the Serdes
* @map_irq: function callback to map interrupts
* @ep_is_internal: indicates an internal emulated endpoint device is connected
@ -85,7 +84,6 @@ struct iproc_pcie {
void __iomem *base;
phys_addr_t base_addr;
struct resource mem;
struct pci_bus *root_bus;
struct phy *phy;
int (*map_irq)(const struct pci_dev *, u8, u8);
bool ep_is_internal;

20
drivers/pci/controller/pcie-mediatek.c
View File

@ -209,7 +209,6 @@ struct mtk_pcie_port {
* @mem: non-prefetchable memory resource
* @ports: pointer to PCIe port information
* @soc: pointer to SoC-dependent operations
* @busnr: root bus number
*/
struct mtk_pcie {
struct device *dev;
@ -218,7 +217,6 @@ struct mtk_pcie {
struct list_head ports;
const struct mtk_pcie_soc *soc;
unsigned int busnr;
};
static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie)
@ -905,7 +903,6 @@ static int mtk_pcie_parse_port(struct mtk_pcie *pcie,
int slot)
{
struct mtk_pcie_port *port;
struct resource *regs;
struct device *dev = pcie->dev;
struct platform_device *pdev = to_platform_device(dev);
char name[10];
@ -916,8 +913,7 @@ static int mtk_pcie_parse_port(struct mtk_pcie *pcie,
return -ENOMEM;
snprintf(name, sizeof(name), "port%d", slot);
regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
port->base = devm_ioremap_resource(dev, regs);
port->base = devm_platform_ioremap_resource_byname(pdev, name);
if (IS_ERR(port->base)) {
dev_err(dev, "failed to map port%d base\n", slot);
return PTR_ERR(port->base);
@ -1031,18 +1027,8 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
struct device *dev = pcie->dev;
struct device_node *node = dev->of_node, *child;
struct mtk_pcie_port *port, *tmp;
struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
struct list_head *windows = &host->windows;
struct resource *bus;
int err;
err = pci_parse_request_of_pci_ranges(dev, windows,
&host->dma_ranges, &bus);
if (err)
return err;
pcie->busnr = bus->start;
for_each_available_child_of_node(node, child) {
int slot;
@ -1096,11 +1082,7 @@ static int mtk_pcie_probe(struct platform_device *pdev)
if (err)
return err;
host->busnr = pcie->busnr;
host->dev.parent = pcie->dev;
host->ops = pcie->soc->ops;
host->map_irq = of_irq_parse_and_map_pci;
host->swizzle_irq = pci_common_swizzle;
host->sysdata = pcie;
err = pci_host_probe(host);

95
drivers/pci/controller/pcie-rcar-host.c
View File

@ -53,8 +53,6 @@ struct rcar_pcie_host {
struct device *dev;
struct phy *phy;
void __iomem *base;
struct list_head resources;
int root_bus_nr;
struct clk *bus_clk;
struct rcar_msi msi;
int (*phy_init_fn)(struct rcar_pcie_host *host);
@ -100,22 +98,14 @@ static int rcar_pcie_config_access(struct rcar_pcie_host *host,
if (dev != 0)
return PCIBIOS_DEVICE_NOT_FOUND;
if (access_type == RCAR_PCI_ACCESS_READ) {
if (access_type == RCAR_PCI_ACCESS_READ)
*data = rcar_pci_read_reg(pcie, PCICONF(index));
} else {
/* Keep an eye out for changes to the root bus number */
if (pci_is_root_bus(bus) && (reg == PCI_PRIMARY_BUS))
host->root_bus_nr = *data & 0xff;
else
rcar_pci_write_reg(pcie, *data, PCICONF(index));
}
return PCIBIOS_SUCCESSFUL;
}
if (host->root_bus_nr < 0)
return PCIBIOS_DEVICE_NOT_FOUND;
/* Clear errors */
rcar_pci_write_reg(pcie, rcar_pci_read_reg(pcie, PCIEERRFR), PCIEERRFR);
@ -124,7 +114,7 @@ static int rcar_pcie_config_access(struct rcar_pcie_host *host,
PCIE_CONF_DEV(dev) | PCIE_CONF_FUNC(func) | reg, PCIECAR);
/* Enable the configuration access */
if (bus->parent->number == host->root_bus_nr)
if (pci_is_root_bus(bus->parent))
rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE0, PCIECCTLR);
else
rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE1, PCIECCTLR);
@ -212,38 +202,6 @@ static struct pci_ops rcar_pcie_ops = {
.write = rcar_pcie_write_conf,
};
static int rcar_pcie_setup(struct list_head *resource,
struct rcar_pcie_host *host)
{
struct resource_entry *win;
int i = 0;
/* Setup PCI resources */
resource_list_for_each_entry(win, &host->resources) {
struct resource *res = win->res;
if (!res->flags)
continue;
switch (resource_type(res)) {
case IORESOURCE_IO:
case IORESOURCE_MEM:
rcar_pcie_set_outbound(&host->pcie, i, win);
i++;
break;
case IORESOURCE_BUS:
host->root_bus_nr = res->start;
break;
default:
continue;
}
pci_add_resource(resource, res);
}
return 1;
}
static void rcar_pcie_force_speedup(struct rcar_pcie *pcie)
{
struct device *dev = pcie->dev;
@ -301,6 +259,7 @@ done:
static void rcar_pcie_hw_enable(struct rcar_pcie_host *host)
{
struct rcar_pcie *pcie = &host->pcie;
struct pci_host_bridge *bridge = pci_host_bridge_from_priv(host);
struct resource_entry *win;
LIST_HEAD(res);
int i = 0;
@ -309,7 +268,7 @@ static void rcar_pcie_hw_enable(struct rcar_pcie_host *host)
rcar_pcie_force_speedup(pcie);
/* Setup PCI resources */
resource_list_for_each_entry(win, &host->resources) {
resource_list_for_each_entry(win, &bridge->windows) {
struct resource *res = win->res;
if (!res->flags)
@ -328,42 +287,17 @@ static void rcar_pcie_hw_enable(struct rcar_pcie_host *host)
static int rcar_pcie_enable(struct rcar_pcie_host *host)
{
struct pci_host_bridge *bridge = pci_host_bridge_from_priv(host);
struct rcar_pcie *pcie = &host->pcie;
struct device *dev = pcie->dev;
struct pci_bus *bus, *child;
int ret;
/* Try setting 5 GT/s link speed */
rcar_pcie_force_speedup(pcie);
rcar_pcie_setup(&bridge->windows, host);
rcar_pcie_hw_enable(host);
pci_add_flags(PCI_REASSIGN_ALL_BUS);
bridge->dev.parent = dev;
bridge->sysdata = host;
bridge->busnr = host->root_bus_nr;
bridge->ops = &rcar_pcie_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
if (IS_ENABLED(CONFIG_PCI_MSI))
bridge->msi = &host->msi.chip;
ret = pci_scan_root_bus_bridge(bridge);
if (ret < 0)
return ret;
bus = bridge->bus;
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
list_for_each_entry(child, &bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(bus);
return 0;
return pci_host_probe(bridge);
}
static int phy_wait_for_ack(struct rcar_pcie *pcie)
@ -968,7 +902,7 @@ static int rcar_pcie_probe(struct platform_device *pdev)
int err;
struct pci_host_bridge *bridge;
bridge = pci_alloc_host_bridge(sizeof(*host));
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*host));
if (!bridge)
return -ENOMEM;
@ -977,16 +911,11 @@ static int rcar_pcie_probe(struct platform_device *pdev)
pcie->dev = dev;
platform_set_drvdata(pdev, host);
err = pci_parse_request_of_pci_ranges(dev, &host->resources,
&bridge->dma_ranges, NULL);
if (err)
goto err_free_bridge;
pm_runtime_enable(pcie->dev);
err = pm_runtime_get_sync(pcie->dev);
if (err < 0) {
dev_err(pcie->dev, "pm_runtime_get_sync failed\n");
goto err_pm_disable;
goto err_pm_put;
}
err = rcar_pcie_get_resources(host);
@ -1057,13 +986,7 @@ err_unmap_msi_irqs:
err_pm_put:
pm_runtime_put(dev);
err_pm_disable:
pm_runtime_disable(dev);
pci_free_resource_list(&host->resources);
err_free_bridge:
pci_free_host_bridge(bridge);
return err;
}

1
drivers/pci/controller/pcie-rockchip-ep.c
View File

@ -22,6 +22,7 @@
/**
* struct rockchip_pcie_ep - private data for PCIe endpoint controller driver
* @rockchip: Rockchip PCIe controller
* @epc: PCI EPC device
* @max_regions: maximum number of regions supported by hardware
* @ob_region_map: bitmask of mapped outbound regions
* @ob_addr: base addresses in the AXI bus where the outbound regions start

54
drivers/pci/controller/pcie-rockchip-host.c
View File

@ -72,14 +72,14 @@ static int rockchip_pcie_valid_device(struct rockchip_pcie *rockchip,
struct pci_bus *bus, int dev)
{
/* access only one slot on each root port */
if (bus->number == rockchip->root_bus_nr && dev > 0)
if (pci_is_root_bus(bus) && dev > 0)
return 0;
/*
* do not read more than one device on the bus directly attached
* to RC's downstream side.
*/
if (bus->primary == rockchip->root_bus_nr && dev > 0)
if (pci_is_root_bus(bus->parent) && dev > 0)
return 0;
return 1;
@ -170,7 +170,7 @@ static int rockchip_pcie_rd_other_conf(struct rockchip_pcie *rockchip,
return PCIBIOS_BAD_REGISTER_NUMBER;
}
if (bus->parent->number == rockchip->root_bus_nr)
if (pci_is_root_bus(bus->parent))
rockchip_pcie_cfg_configuration_accesses(rockchip,
AXI_WRAPPER_TYPE0_CFG);
else
@ -201,7 +201,7 @@ static int rockchip_pcie_wr_other_conf(struct rockchip_pcie *rockchip,
if (!IS_ALIGNED(busdev, size))
return PCIBIOS_BAD_REGISTER_NUMBER;
if (bus->parent->number == rockchip->root_bus_nr)
if (pci_is_root_bus(bus->parent))
rockchip_pcie_cfg_configuration_accesses(rockchip,
AXI_WRAPPER_TYPE0_CFG);
else
@ -230,7 +230,7 @@ static int rockchip_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
return PCIBIOS_DEVICE_NOT_FOUND;
}
if (bus->number == rockchip->root_bus_nr)
if (pci_is_root_bus(bus))
return rockchip_pcie_rd_own_conf(rockchip, where, size, val);
return rockchip_pcie_rd_other_conf(rockchip, bus, devfn, where, size,
@ -245,7 +245,7 @@ static int rockchip_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn)))
return PCIBIOS_DEVICE_NOT_FOUND;
if (bus->number == rockchip->root_bus_nr)
if (pci_is_root_bus(bus))
return rockchip_pcie_wr_own_conf(rockchip, where, size, val);
return rockchip_pcie_wr_other_conf(rockchip, bus, devfn, where, size,
@ -549,10 +549,8 @@ static int rockchip_pcie_setup_irq(struct rockchip_pcie *rockchip)
struct platform_device *pdev = to_platform_device(dev);
irq = platform_get_irq_byname(pdev, "sys");
if (irq < 0) {
dev_err(dev, "missing sys IRQ resource\n");
if (irq < 0)
return irq;
}
err = devm_request_irq(dev, irq, rockchip_pcie_subsys_irq_handler,
IRQF_SHARED, "pcie-sys", rockchip);
@ -562,20 +560,16 @@ static int rockchip_pcie_setup_irq(struct rockchip_pcie *rockchip)
}
irq = platform_get_irq_byname(pdev, "legacy");
if (irq < 0) {
dev_err(dev, "missing legacy IRQ resource\n");
if (irq < 0)
return irq;
}
irq_set_chained_handler_and_data(irq,
rockchip_pcie_legacy_int_handler,
rockchip);
irq = platform_get_irq_byname(pdev, "client");
if (irq < 0) {
dev_err(dev, "missing client IRQ resource\n");
if (irq < 0)
return irq;
}
err = devm_request_irq(dev, irq, rockchip_pcie_client_irq_handler,
IRQF_SHARED, "pcie-client", rockchip);
@ -949,9 +943,7 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
{
struct rockchip_pcie *rockchip;
struct device *dev = &pdev->dev;
struct pci_bus *bus, *child;
struct pci_host_bridge *bridge;
struct resource *bus_res;
int err;
if (!dev->of_node)
@ -991,13 +983,6 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
if (err < 0)
goto err_deinit_port;
err = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
&bridge->dma_ranges, &bus_res);
if (err)
goto err_remove_irq_domain;
rockchip->root_bus_nr = bus_res->start;
err = rockchip_pcie_cfg_atu(rockchip);
if (err)
goto err_remove_irq_domain;
@ -1008,27 +993,13 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
goto err_remove_irq_domain;
}
bridge->dev.parent = dev;
bridge->sysdata = rockchip;
bridge->busnr = 0;
bridge->ops = &rockchip_pcie_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
err = pci_scan_root_bus_bridge(bridge);
err = pci_host_probe(bridge);
if (err < 0)
goto err_remove_irq_domain;
bus = bridge->bus;
rockchip->root_bus = bus;
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
list_for_each_entry(child, &bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(bus);
return 0;
err_remove_irq_domain:
@ -1051,9 +1022,10 @@ static int rockchip_pcie_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
struct pci_host_bridge *bridge = pci_host_bridge_from_priv(rockchip);
pci_stop_root_bus(rockchip->root_bus);
pci_remove_root_bus(rockchip->root_bus);
pci_stop_root_bus(bridge->bus);
pci_remove_root_bus(bridge->bus);
irq_domain_remove(rockchip->irq_domain);
rockchip_pcie_deinit_phys(rockchip);

5
drivers/pci/controller/pcie-rockchip.c
View File

@ -45,9 +45,8 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
return -EINVAL;
}
regs = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"apb-base");
rockchip->apb_base = devm_ioremap_resource(dev, regs);
rockchip->apb_base =
devm_platform_ioremap_resource_byname(pdev, "apb-base");
if (IS_ERR(rockchip->apb_base))
return PTR_ERR(rockchip->apb_base);

2
drivers/pci/controller/pcie-rockchip.h
View File

@ -298,12 +298,10 @@ struct rockchip_pcie {
struct gpio_desc *ep_gpio;
u32 lanes;
u8 lanes_map;
u8 root_bus_nr;
int link_gen;
struct device *dev;
struct irq_domain *irq_domain;
int offset;
struct pci_bus *root_bus;
void __iomem *msg_region;
phys_addr_t msg_bus_addr;
bool is_rc;

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

@ -273,10 +273,8 @@ static int tango_pcie_probe(struct platform_device *pdev)
writel_relaxed(0, pcie->base + SMP8759_ENABLE + offset);
virq = platform_get_irq(pdev, 1);
if (virq < 0) {
dev_err(dev, "Failed to map IRQ\n");
if (virq < 0)
return virq;
}
irq_dom = irq_domain_create_linear(fwnode, MSI_MAX, &dom_ops, pcie);
if (!irq_dom) {

611
drivers/pci/controller/pcie-xilinx-cpm.c Normal file
View File

@ -0,0 +1,611 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* PCIe host controller driver for Xilinx Versal CPM DMA Bridge
*
* (C) Copyright 2019 - 2020, Xilinx, Inc.
*/
#include <linux/bitfield.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqchip.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
#include <linux/of_platform.h>
#include <linux/of_irq.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/pci-ecam.h>
#include "../pci.h"
/* Register definitions */
#define XILINX_CPM_PCIE_REG_IDR 0x00000E10
#define XILINX_CPM_PCIE_REG_IMR 0x00000E14
#define XILINX_CPM_PCIE_REG_PSCR 0x00000E1C
#define XILINX_CPM_PCIE_REG_RPSC 0x00000E20
#define XILINX_CPM_PCIE_REG_RPEFR 0x00000E2C
#define XILINX_CPM_PCIE_REG_IDRN 0x00000E38
#define XILINX_CPM_PCIE_REG_IDRN_MASK 0x00000E3C
#define XILINX_CPM_PCIE_MISC_IR_STATUS 0x00000340
#define XILINX_CPM_PCIE_MISC_IR_ENABLE 0x00000348
#define XILINX_CPM_PCIE_MISC_IR_LOCAL BIT(1)
/* Interrupt registers definitions */
#define XILINX_CPM_PCIE_INTR_LINK_DOWN 0
#define XILINX_CPM_PCIE_INTR_HOT_RESET 3
#define XILINX_CPM_PCIE_INTR_CFG_PCIE_TIMEOUT 4
#define XILINX_CPM_PCIE_INTR_CFG_TIMEOUT 8
#define XILINX_CPM_PCIE_INTR_CORRECTABLE 9
#define XILINX_CPM_PCIE_INTR_NONFATAL 10
#define XILINX_CPM_PCIE_INTR_FATAL 11
#define XILINX_CPM_PCIE_INTR_CFG_ERR_POISON 12
#define XILINX_CPM_PCIE_INTR_PME_TO_ACK_RCVD 15
#define XILINX_CPM_PCIE_INTR_INTX 16
#define XILINX_CPM_PCIE_INTR_PM_PME_RCVD 17
#define XILINX_CPM_PCIE_INTR_SLV_UNSUPP 20
#define XILINX_CPM_PCIE_INTR_SLV_UNEXP 21
#define XILINX_CPM_PCIE_INTR_SLV_COMPL 22
#define XILINX_CPM_PCIE_INTR_SLV_ERRP 23
#define XILINX_CPM_PCIE_INTR_SLV_CMPABT 24
#define XILINX_CPM_PCIE_INTR_SLV_ILLBUR 25
#define XILINX_CPM_PCIE_INTR_MST_DECERR 26
#define XILINX_CPM_PCIE_INTR_MST_SLVERR 27
#define XILINX_CPM_PCIE_INTR_SLV_PCIE_TIMEOUT 28
#define IMR(x) BIT(XILINX_CPM_PCIE_INTR_ ##x)
#define XILINX_CPM_PCIE_IMR_ALL_MASK \
( \
IMR(LINK_DOWN) | \
IMR(HOT_RESET) | \
IMR(CFG_PCIE_TIMEOUT) | \
IMR(CFG_TIMEOUT) | \
IMR(CORRECTABLE) | \
IMR(NONFATAL) | \
IMR(FATAL) | \
IMR(CFG_ERR_POISON) | \
IMR(PME_TO_ACK_RCVD) | \
IMR(INTX) | \
IMR(PM_PME_RCVD) | \
IMR(SLV_UNSUPP) | \
IMR(SLV_UNEXP) | \
IMR(SLV_COMPL) | \
IMR(SLV_ERRP) | \
IMR(SLV_CMPABT) | \
IMR(SLV_ILLBUR) | \
IMR(MST_DECERR) | \
IMR(MST_SLVERR) | \
IMR(SLV_PCIE_TIMEOUT) \
)
#define XILINX_CPM_PCIE_IDR_ALL_MASK 0xFFFFFFFF
#define XILINX_CPM_PCIE_IDRN_MASK GENMASK(19, 16)
#define XILINX_CPM_PCIE_IDRN_SHIFT 16
/* Root Port Error FIFO Read Register definitions */
#define XILINX_CPM_PCIE_RPEFR_ERR_VALID BIT(18)
#define XILINX_CPM_PCIE_RPEFR_REQ_ID GENMASK(15, 0)
#define XILINX_CPM_PCIE_RPEFR_ALL_MASK 0xFFFFFFFF
/* Root Port Status/control Register definitions */
#define XILINX_CPM_PCIE_REG_RPSC_BEN BIT(0)
/* Phy Status/Control Register definitions */
#define XILINX_CPM_PCIE_REG_PSCR_LNKUP BIT(11)
/**
* struct xilinx_cpm_pcie_port - PCIe port information
* @reg_base: Bridge Register Base
* @cpm_base: CPM System Level Control and Status Register(SLCR) Base
* @dev: Device pointer
* @intx_domain: Legacy IRQ domain pointer
* @cpm_domain: CPM IRQ domain pointer
* @cfg: Holds mappings of config space window
* @intx_irq: legacy interrupt number
* @irq: Error interrupt number
* @lock: lock protecting shared register access
*/
struct xilinx_cpm_pcie_port {
void __iomem *reg_base;
void __iomem *cpm_base;
struct device *dev;
struct irq_domain *intx_domain;
struct irq_domain *cpm_domain;
struct pci_config_window *cfg;
int intx_irq;
int irq;
raw_spinlock_t lock;
};
static u32 pcie_read(struct xilinx_cpm_pcie_port *port, u32 reg)
{
return readl_relaxed(port->reg_base + reg);
}
static void pcie_write(struct xilinx_cpm_pcie_port *port,
u32 val, u32 reg)
{
writel_relaxed(val, port->reg_base + reg);
}
static bool cpm_pcie_link_up(struct xilinx_cpm_pcie_port *port)
{
return (pcie_read(port, XILINX_CPM_PCIE_REG_PSCR) &
XILINX_CPM_PCIE_REG_PSCR_LNKUP);
}
static void cpm_pcie_clear_err_interrupts(struct xilinx_cpm_pcie_port *port)
{
unsigned long val = pcie_read(port, XILINX_CPM_PCIE_REG_RPEFR);
if (val & XILINX_CPM_PCIE_RPEFR_ERR_VALID) {
dev_dbg(port->dev, "Requester ID %lu\n",
val & XILINX_CPM_PCIE_RPEFR_REQ_ID);
pcie_write(port, XILINX_CPM_PCIE_RPEFR_ALL_MASK,
XILINX_CPM_PCIE_REG_RPEFR);
}
}
static void xilinx_cpm_mask_leg_irq(struct irq_data *data)
{
struct xilinx_cpm_pcie_port *port = irq_data_get_irq_chip_data(data);
unsigned long flags;
u32 mask;
u32 val;
mask = BIT(data->hwirq + XILINX_CPM_PCIE_IDRN_SHIFT);
raw_spin_lock_irqsave(&port->lock, flags);
val = pcie_read(port, XILINX_CPM_PCIE_REG_IDRN_MASK);
pcie_write(port, (val & (~mask)), XILINX_CPM_PCIE_REG_IDRN_MASK);
raw_spin_unlock_irqrestore(&port->lock, flags);
}
static void xilinx_cpm_unmask_leg_irq(struct irq_data *data)
{
struct xilinx_cpm_pcie_port *port = irq_data_get_irq_chip_data(data);
unsigned long flags;
u32 mask;
u32 val;
mask = BIT(data->hwirq + XILINX_CPM_PCIE_IDRN_SHIFT);
raw_spin_lock_irqsave(&port->lock, flags);
val = pcie_read(port, XILINX_CPM_PCIE_REG_IDRN_MASK);
pcie_write(port, (val | mask), XILINX_CPM_PCIE_REG_IDRN_MASK);
raw_spin_unlock_irqrestore(&port->lock, flags);
}
static struct irq_chip xilinx_cpm_leg_irq_chip = {
.name = "INTx",
.irq_mask = xilinx_cpm_mask_leg_irq,
.irq_unmask = xilinx_cpm_unmask_leg_irq,
};
/**
* xilinx_cpm_pcie_intx_map - Set the handler for the INTx and mark IRQ as valid
* @domain: IRQ domain
* @irq: Virtual IRQ number
* @hwirq: HW interrupt number
*
* Return: Always returns 0.
*/
static int xilinx_cpm_pcie_intx_map(struct irq_domain *domain,
unsigned int irq, irq_hw_number_t hwirq)
{
irq_set_chip_and_handler(irq, &xilinx_cpm_leg_irq_chip,
handle_level_irq);
irq_set_chip_data(irq, domain->host_data);
irq_set_status_flags(irq, IRQ_LEVEL);
return 0;
}
/* INTx IRQ Domain operations */
static const struct irq_domain_ops intx_domain_ops = {
.map = xilinx_cpm_pcie_intx_map,
};
static void xilinx_cpm_pcie_intx_flow(struct irq_desc *desc)
{
struct xilinx_cpm_pcie_port *port = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
unsigned long val;
int i;
chained_irq_enter(chip, desc);
val = FIELD_GET(XILINX_CPM_PCIE_IDRN_MASK,
pcie_read(port, XILINX_CPM_PCIE_REG_IDRN));
for_each_set_bit(i, &val, PCI_NUM_INTX)
generic_handle_irq(irq_find_mapping(port->intx_domain, i));
chained_irq_exit(chip, desc);
}
static void xilinx_cpm_mask_event_irq(struct irq_data *d)
{
struct xilinx_cpm_pcie_port *port = irq_data_get_irq_chip_data(d);
u32 val;
raw_spin_lock(&port->lock);
val = pcie_read(port, XILINX_CPM_PCIE_REG_IMR);
val &= ~BIT(d->hwirq);
pcie_write(port, val, XILINX_CPM_PCIE_REG_IMR);
raw_spin_unlock(&port->lock);
}
static void xilinx_cpm_unmask_event_irq(struct irq_data *d)
{
struct xilinx_cpm_pcie_port *port = irq_data_get_irq_chip_data(d);
u32 val;
raw_spin_lock(&port->lock);
val = pcie_read(port, XILINX_CPM_PCIE_REG_IMR);
val |= BIT(d->hwirq);
pcie_write(port, val, XILINX_CPM_PCIE_REG_IMR);
raw_spin_unlock(&port->lock);
}
static struct irq_chip xilinx_cpm_event_irq_chip = {
.name = "RC-Event",
.irq_mask = xilinx_cpm_mask_event_irq,
.irq_unmask = xilinx_cpm_unmask_event_irq,
};
static int xilinx_cpm_pcie_event_map(struct irq_domain *domain,
unsigned int irq, irq_hw_number_t hwirq)
{
irq_set_chip_and_handler(irq, &xilinx_cpm_event_irq_chip,
handle_level_irq);
irq_set_chip_data(irq, domain->host_data);
irq_set_status_flags(irq, IRQ_LEVEL);
return 0;
}
static const struct irq_domain_ops event_domain_ops = {
.map = xilinx_cpm_pcie_event_map,
};
static void xilinx_cpm_pcie_event_flow(struct irq_desc *desc)
{
struct xilinx_cpm_pcie_port *port = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
unsigned long val;
int i;
chained_irq_enter(chip, desc);
val = pcie_read(port, XILINX_CPM_PCIE_REG_IDR);
val &= pcie_read(port, XILINX_CPM_PCIE_REG_IMR);
for_each_set_bit(i, &val, 32)
generic_handle_irq(irq_find_mapping(port->cpm_domain, i));
pcie_write(port, val, XILINX_CPM_PCIE_REG_IDR);
/*
* XILINX_CPM_PCIE_MISC_IR_STATUS register is mapped to
* CPM SLCR block.
*/
val = readl_relaxed(port->cpm_base + XILINX_CPM_PCIE_MISC_IR_STATUS);
if (val)
writel_relaxed(val,
port->cpm_base + XILINX_CPM_PCIE_MISC_IR_STATUS);
chained_irq_exit(chip, desc);
}
#define _IC(x, s) \
[XILINX_CPM_PCIE_INTR_ ## x] = { __stringify(x), s }
static const struct {
const char *sym;
const char *str;
} intr_cause[32] = {
_IC(LINK_DOWN, "Link Down"),
_IC(HOT_RESET, "Hot reset"),
_IC(CFG_TIMEOUT, "ECAM access timeout"),
_IC(CORRECTABLE, "Correctable error message"),
_IC(NONFATAL, "Non fatal error message"),
_IC(FATAL, "Fatal error message"),
_IC(SLV_UNSUPP, "Slave unsupported request"),
_IC(SLV_UNEXP, "Slave unexpected completion"),
_IC(SLV_COMPL, "Slave completion timeout"),
_IC(SLV_ERRP, "Slave Error Poison"),
_IC(SLV_CMPABT, "Slave Completer Abort"),
_IC(SLV_ILLBUR, "Slave Illegal Burst"),
_IC(MST_DECERR, "Master decode error"),
_IC(MST_SLVERR, "Master slave error"),
_IC(CFG_PCIE_TIMEOUT, "PCIe ECAM access timeout"),
_IC(CFG_ERR_POISON, "ECAM poisoned completion received"),
_IC(PME_TO_ACK_RCVD, "PME_TO_ACK message received"),
_IC(PM_PME_RCVD, "PM_PME message received"),
_IC(SLV_PCIE_TIMEOUT, "PCIe completion timeout received"),
};
static irqreturn_t xilinx_cpm_pcie_intr_handler(int irq, void *dev_id)
{
struct xilinx_cpm_pcie_port *port = dev_id;
struct device *dev = port->dev;
struct irq_data *d;
d = irq_domain_get_irq_data(port->cpm_domain, irq);
switch (d->hwirq) {
case XILINX_CPM_PCIE_INTR_CORRECTABLE:
case XILINX_CPM_PCIE_INTR_NONFATAL:
case XILINX_CPM_PCIE_INTR_FATAL:
cpm_pcie_clear_err_interrupts(port);
fallthrough;
default:
if (intr_cause[d->hwirq].str)
dev_warn(dev, "%s\n", intr_cause[d->hwirq].str);
else
dev_warn(dev, "Unknown IRQ %ld\n", d->hwirq);
}
return IRQ_HANDLED;
}
static void xilinx_cpm_free_irq_domains(struct xilinx_cpm_pcie_port *port)
{
if (port->intx_domain) {
irq_domain_remove(port->intx_domain);
port->intx_domain = NULL;
}
if (port->cpm_domain) {
irq_domain_remove(port->cpm_domain);
port->cpm_domain = NULL;
}
}
/**
* xilinx_cpm_pcie_init_irq_domain - Initialize IRQ domain
* @port: PCIe port information
*
* Return: '0' on success and error value on failure
*/
static int xilinx_cpm_pcie_init_irq_domain(struct xilinx_cpm_pcie_port *port)
{
struct device *dev = port->dev;
struct device_node *node = dev->of_node;
struct device_node *pcie_intc_node;
/* Setup INTx */
pcie_intc_node = of_get_next_child(node, NULL);
if (!pcie_intc_node) {
dev_err(dev, "No PCIe Intc node found\n");
return -EINVAL;
}
port->cpm_domain = irq_domain_add_linear(pcie_intc_node, 32,
&event_domain_ops,
port);
if (!port->cpm_domain)
goto out;
irq_domain_update_bus_token(port->cpm_domain, DOMAIN_BUS_NEXUS);
port->intx_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,
&intx_domain_ops,
port);
if (!port->intx_domain)
goto out;
irq_domain_update_bus_token(port->intx_domain, DOMAIN_BUS_WIRED);
of_node_put(pcie_intc_node);
raw_spin_lock_init(&port->lock);
return 0;
out:
xilinx_cpm_free_irq_domains(port);
dev_err(dev, "Failed to allocate IRQ domains\n");
return -ENOMEM;
}
static int xilinx_cpm_setup_irq(struct xilinx_cpm_pcie_port *port)
{
struct device *dev = port->dev;
struct platform_device *pdev = to_platform_device(dev);
int i, irq;
port->irq = platform_get_irq(pdev, 0);
if (port->irq < 0)
return port->irq;
for (i = 0; i < ARRAY_SIZE(intr_cause); i++) {
int err;
if (!intr_cause[i].str)
continue;
irq = irq_create_mapping(port->cpm_domain, i);
if (!irq) {
dev_err(dev, "Failed to map interrupt\n");
return -ENXIO;
}
err = devm_request_irq(dev, irq, xilinx_cpm_pcie_intr_handler,
0, intr_cause[i].sym, port);
if (err) {
dev_err(dev, "Failed to request IRQ %d\n", irq);
return err;
}
}
port->intx_irq = irq_create_mapping(port->cpm_domain,
XILINX_CPM_PCIE_INTR_INTX);
if (!port->intx_irq) {
dev_err(dev, "Failed to map INTx interrupt\n");
return -ENXIO;
}
/* Plug the INTx chained handler */
irq_set_chained_handler_and_data(port->intx_irq,
xilinx_cpm_pcie_intx_flow, port);
/* Plug the main event chained handler */
irq_set_chained_handler_and_data(port->irq,
xilinx_cpm_pcie_event_flow, port);
return 0;
}
/**
* xilinx_cpm_pcie_init_port - Initialize hardware
* @port: PCIe port information
*/
static void xilinx_cpm_pcie_init_port(struct xilinx_cpm_pcie_port *port)
{
if (cpm_pcie_link_up(port))
dev_info(port->dev, "PCIe Link is UP\n");
else
dev_info(port->dev, "PCIe Link is DOWN\n");
/* Disable all interrupts */
pcie_write(port, ~XILINX_CPM_PCIE_IDR_ALL_MASK,
XILINX_CPM_PCIE_REG_IMR);
/* Clear pending interrupts */
pcie_write(port, pcie_read(port, XILINX_CPM_PCIE_REG_IDR) &
XILINX_CPM_PCIE_IMR_ALL_MASK,
XILINX_CPM_PCIE_REG_IDR);
/*
* XILINX_CPM_PCIE_MISC_IR_ENABLE register is mapped to
* CPM SLCR block.
*/
writel(XILINX_CPM_PCIE_MISC_IR_LOCAL,
port->cpm_base + XILINX_CPM_PCIE_MISC_IR_ENABLE);
/* Enable the Bridge enable bit */
pcie_write(port, pcie_read(port, XILINX_CPM_PCIE_REG_RPSC) |
XILINX_CPM_PCIE_REG_RPSC_BEN,
XILINX_CPM_PCIE_REG_RPSC);
}
/**
* xilinx_cpm_pcie_parse_dt - Parse Device tree
* @port: PCIe port information
* @bus_range: Bus resource
*
* Return: '0' on success and error value on failure
*/
static int xilinx_cpm_pcie_parse_dt(struct xilinx_cpm_pcie_port *port,
struct resource *bus_range)
{
struct device *dev = port->dev;
struct platform_device *pdev = to_platform_device(dev);
struct resource *res;
port->cpm_base = devm_platform_ioremap_resource_byname(pdev,
"cpm_slcr");
if (IS_ERR(port->cpm_base))
return PTR_ERR(port->cpm_base);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
if (!res)
return -ENXIO;
port->cfg = pci_ecam_create(dev, res, bus_range,
&pci_generic_ecam_ops);
if (IS_ERR(port->cfg))
return PTR_ERR(port->cfg);
port->reg_base = port->cfg->win;
return 0;
}
static void xilinx_cpm_free_interrupts(struct xilinx_cpm_pcie_port *port)
{
irq_set_chained_handler_and_data(port->intx_irq, NULL, NULL);
irq_set_chained_handler_and_data(port->irq, NULL, NULL);
}
/**
* xilinx_cpm_pcie_probe - Probe function
* @pdev: Platform device pointer
*
* Return: '0' on success and error value on failure
*/
static int xilinx_cpm_pcie_probe(struct platform_device *pdev)
{
struct xilinx_cpm_pcie_port *port;
struct device *dev = &pdev->dev;
struct pci_host_bridge *bridge;
struct resource_entry *bus;
int err;
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*port));
if (!bridge)
return -ENODEV;
port = pci_host_bridge_priv(bridge);
port->dev = dev;
err = xilinx_cpm_pcie_init_irq_domain(port);
if (err)
return err;
bus = resource_list_first_type(&bridge->windows, IORESOURCE_BUS);
if (!bus)
return -ENODEV;
err = xilinx_cpm_pcie_parse_dt(port, bus->res);
if (err) {
dev_err(dev, "Parsing DT failed\n");
goto err_parse_dt;
}
xilinx_cpm_pcie_init_port(port);
err = xilinx_cpm_setup_irq(port);
if (err) {
dev_err(dev, "Failed to set up interrupts\n");
goto err_setup_irq;
}
bridge->dev.parent = dev;
bridge->sysdata = port->cfg;
bridge->busnr = port->cfg->busr.start;
bridge->ops = (struct pci_ops *)&pci_generic_ecam_ops.pci_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
err = pci_host_probe(bridge);
if (err < 0)
goto err_host_bridge;
return 0;
err_host_bridge:
xilinx_cpm_free_interrupts(port);
err_setup_irq:
pci_ecam_free(port->cfg);
err_parse_dt:
xilinx_cpm_free_irq_domains(port);
return err;
}
static const struct of_device_id xilinx_cpm_pcie_of_match[] = {
{ .compatible = "xlnx,versal-cpm-host-1.00", },
{}
};
static struct platform_driver xilinx_cpm_pcie_driver = {
.driver = {
.name = "xilinx-cpm-pcie",
.of_match_table = xilinx_cpm_pcie_of_match,
.suppress_bind_attrs = true,
},
.probe = xilinx_cpm_pcie_probe,
};
builtin_platform_driver(xilinx_cpm_pcie_driver);

45
drivers/pci/controller/pcie-xilinx-nwl.c
View File

@ -166,7 +166,6 @@ struct nwl_pcie {
int irq_misc;
u32 ecam_value;
u8 last_busno;
u8 root_busno;
struct nwl_msi msi;
struct irq_domain *legacy_irq_domain;
raw_spinlock_t leg_mask_lock;
@ -217,13 +216,11 @@ static bool nwl_pcie_valid_device(struct pci_bus *bus, unsigned int devfn)
struct nwl_pcie *pcie = bus->sysdata;
/* Check link before accessing downstream ports */
if (bus->number != pcie->root_busno) {
if (!pci_is_root_bus(bus)) {
if (!nwl_pcie_link_up(pcie))
return false;
}
/* Only one device down on each root port */
if (bus->number == pcie->root_busno && devfn > 0)
} else if (devfn > 0)
/* Only one device down on each root port */
return false;
return true;
@ -586,7 +583,6 @@ static int nwl_pcie_enable_msi(struct nwl_pcie *pcie)
/* Get msi_1 IRQ number */
msi->irq_msi1 = platform_get_irq_byname(pdev, "msi1");
if (msi->irq_msi1 < 0) {
dev_err(dev, "failed to get IRQ#%d\n", msi->irq_msi1);
ret = -EINVAL;
goto err;
}
@ -597,7 +593,6 @@ static int nwl_pcie_enable_msi(struct nwl_pcie *pcie)
/* Get msi_0 IRQ number */
msi->irq_msi0 = platform_get_irq_byname(pdev, "msi0");
if (msi->irq_msi0 < 0) {
dev_err(dev, "failed to get IRQ#%d\n", msi->irq_msi0);
ret = -EINVAL;
goto err;
}
@ -728,11 +723,8 @@ static int nwl_pcie_bridge_init(struct nwl_pcie *pcie)
/* Get misc IRQ number */
pcie->irq_misc = platform_get_irq_byname(pdev, "misc");
if (pcie->irq_misc < 0) {
dev_err(dev, "failed to get misc IRQ %d\n",
pcie->irq_misc);
if (pcie->irq_misc < 0)
return -EINVAL;
}
err = devm_request_irq(dev, pcie->irq_misc,
nwl_pcie_misc_handler, IRQF_SHARED,
@ -797,10 +789,8 @@ static int nwl_pcie_parse_dt(struct nwl_pcie *pcie,
/* Get intx IRQ number */
pcie->irq_intx = platform_get_irq_byname(pdev, "intx");
if (pcie->irq_intx < 0) {
dev_err(dev, "failed to get intx IRQ %d\n", pcie->irq_intx);
if (pcie->irq_intx < 0)
return pcie->irq_intx;
}
irq_set_chained_handler_and_data(pcie->irq_intx,
nwl_pcie_leg_handler, pcie);
@ -817,8 +807,6 @@ static int nwl_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct nwl_pcie *pcie;
struct pci_bus *bus;
struct pci_bus *child;
struct pci_host_bridge *bridge;
int err;
@ -843,25 +831,14 @@ static int nwl_pcie_probe(struct platform_device *pdev)
return err;
}
err = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
&bridge->dma_ranges, NULL);
if (err) {
dev_err(dev, "Getting bridge resources failed\n");
return err;
}
err = nwl_pcie_init_irq_domain(pcie);
if (err) {
dev_err(dev, "Failed creating IRQ Domain\n");
return err;
}
bridge->dev.parent = dev;
bridge->sysdata = pcie;
bridge->busnr = pcie->root_busno;
bridge->ops = &nwl_pcie_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
if (IS_ENABLED(CONFIG_PCI_MSI)) {
err = nwl_pcie_enable_msi(pcie);
@ -871,17 +848,7 @@ static int nwl_pcie_probe(struct platform_device *pdev)
}
}
err = pci_scan_root_bus_bridge(bridge);
if (err)
return err;
bus = bridge->bus;
pci_assign_unassigned_bus_resources(bus);
list_for_each_entry(child, &bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(bus);
return 0;
return pci_host_probe(bridge);
}
static struct platform_driver nwl_pcie_driver = {

35
drivers/pci/controller/pcie-xilinx.c
View File

@ -98,7 +98,6 @@
* @reg_base: IO Mapped Register Base
* @irq: Interrupt number
* @msi_pages: MSI pages
* @root_busno: Root Bus number
* @dev: Device pointer
* @msi_domain: MSI IRQ domain pointer
* @leg_domain: Legacy IRQ domain pointer
@ -108,7 +107,6 @@ struct xilinx_pcie_port {
void __iomem *reg_base;
u32 irq;
unsigned long msi_pages;
u8 root_busno;
struct device *dev;
struct irq_domain *msi_domain;
struct irq_domain *leg_domain;
@ -162,14 +160,13 @@ static bool xilinx_pcie_valid_device(struct pci_bus *bus, unsigned int devfn)
struct xilinx_pcie_port *port = bus->sysdata;
/* Check if link is up when trying to access downstream ports */
if (bus->number != port->root_busno)
if (!pci_is_root_bus(bus)) {
if (!xilinx_pcie_link_up(port))
return false;
/* Only one device down on each root port */
if (bus->number == port->root_busno && devfn > 0)
} else if (devfn > 0) {
/* Only one device down on each root port */
return false;
}
return true;
}
@ -616,7 +613,6 @@ static int xilinx_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct xilinx_pcie_port *port;
struct pci_bus *bus, *child;
struct pci_host_bridge *bridge;
int err;
@ -645,35 +641,14 @@ static int xilinx_pcie_probe(struct platform_device *pdev)
return err;
}
err = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
&bridge->dma_ranges, NULL);
if (err) {
dev_err(dev, "Getting bridge resources failed\n");
return err;
}
bridge->dev.parent = dev;
bridge->sysdata = port;
bridge->busnr = 0;
bridge->ops = &xilinx_pcie_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
#ifdef CONFIG_PCI_MSI
xilinx_pcie_msi_chip.dev = dev;
bridge->msi = &xilinx_pcie_msi_chip;
#endif
err = pci_scan_root_bus_bridge(bridge);
if (err < 0)
return err;
bus = bridge->bus;
pci_assign_unassigned_bus_resources(bus);
list_for_each_entry(child, &bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(bus);
return 0;
return pci_host_probe(bridge);
}
static const struct of_device_id xilinx_pcie_of_match[] = {

44
drivers/pci/controller/vmd.c
View File

@ -40,13 +40,19 @@ enum vmd_features {
* membars, in order to allow proper address translation during
* resource assignment to enable guest virtualization
*/
VMD_FEAT_HAS_MEMBAR_SHADOW = (1 << 0),
VMD_FEAT_HAS_MEMBAR_SHADOW = (1 << 0),
/*
* Device may provide root port configuration information which limits
* bus numbering
*/
VMD_FEAT_HAS_BUS_RESTRICTIONS = (1 << 1),
VMD_FEAT_HAS_BUS_RESTRICTIONS = (1 << 1),
/*
* Device contains physical location shadow registers in
* vendor-specific capability space
*/
VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP = (1 << 2),
};
/*
@ -454,6 +460,28 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
}
}
if (features & VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP) {
int pos = pci_find_capability(vmd->dev, PCI_CAP_ID_VNDR);
u32 reg, regu;
pci_read_config_dword(vmd->dev, pos + 4, &reg);
/* "SHDW" */
if (pos && reg == 0x53484457) {
pci_read_config_dword(vmd->dev, pos + 8, &reg);
pci_read_config_dword(vmd->dev, pos + 12, &regu);
offset[0] = vmd->dev->resource[VMD_MEMBAR1].start -
(((u64) regu << 32 | reg) &
PCI_BASE_ADDRESS_MEM_MASK);
pci_read_config_dword(vmd->dev, pos + 16, &reg);
pci_read_config_dword(vmd->dev, pos + 20, &regu);
offset[1] = vmd->dev->resource[VMD_MEMBAR2].start -
(((u64) regu << 32 | reg) &
PCI_BASE_ADDRESS_MEM_MASK);
}
}
/*
* Certain VMD devices may have a root port configuration option which
* limits the bus range to between 0-127, 128-255, or 224-255
@ -720,16 +748,20 @@ static int vmd_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(vmd_dev_pm_ops, vmd_suspend, vmd_resume);
static const struct pci_device_id vmd_ids[] = {
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_201D),},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_201D),
.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP,},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_28C0),
.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW |
VMD_FEAT_HAS_BUS_RESTRICTIONS,},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x467f),
.driver_data = VMD_FEAT_HAS_BUS_RESTRICTIONS,},
.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
VMD_FEAT_HAS_BUS_RESTRICTIONS,},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4c3d),
.driver_data = VMD_FEAT_HAS_BUS_RESTRICTIONS,},
.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
VMD_FEAT_HAS_BUS_RESTRICTIONS,},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VMD_9A0B),
.driver_data = VMD_FEAT_HAS_BUS_RESTRICTIONS,},
.driver_data = VMD_FEAT_HAS_MEMBAR_SHADOW_VSCAP |
VMD_FEAT_HAS_BUS_RESTRICTIONS,},
{0,}
};
MODULE_DEVICE_TABLE(pci, vmd_ids);

2
drivers/pci/endpoint/functions/pci-epf-test.c
View File

@ -181,7 +181,7 @@ static int pci_epf_test_init_dma_chan(struct pci_epf_test *epf_test)
/**
* pci_epf_test_clean_dma_chan() - Function to cleanup EPF test DMA channel
* @epf: the EPF test device that performs data transfer operation
* @epf_test: the EPF test device that performs data transfer operation
*
* Helper to cleanup EPF test DMA channel.
*/

2
drivers/pci/endpoint/pci-ep-cfs.c
View File

@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
/**
/*
* configfs to configure the PCI endpoint
*
* Copyright (C) 2017 Texas Instruments

2
drivers/pci/endpoint/pci-epc-core.c
View File

@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
/**
/*
* PCI Endpoint *Controller* (EPC) library
*
* Copyright (C) 2017 Texas Instruments

2
drivers/pci/endpoint/pci-epc-mem.c
View File

@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
/**
/*
* PCI Endpoint *Controller* Address Space Management
*
* Copyright (C) 2017 Texas Instruments

4
drivers/pci/endpoint/pci-epf-core.c
View File

@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
/**
/*
* PCI Endpoint *Function* (EPF) library
*
* Copyright (C) 2017 Texas Instruments
@ -71,6 +71,7 @@ EXPORT_SYMBOL_GPL(pci_epf_bind);
/**
* pci_epf_free_space() - free the allocated PCI EPF register space
* @epf: the EPF device from whom to free the memory
* @addr: the virtual address of the PCI EPF register space
* @bar: the BAR number corresponding to the register space
*
@ -96,6 +97,7 @@ EXPORT_SYMBOL_GPL(pci_epf_free_space);
/**
* pci_epf_alloc_space() - allocate memory for the PCI EPF register space
* @epf: the EPF device to whom allocate the memory
* @size: the size of the memory that has to be allocated
* @bar: the BAR number corresponding to the allocated register space
* @align: alignment size for the allocation region

4
drivers/pci/hotplug/acpi_pcihp.c
View File

@ -61,7 +61,7 @@ static acpi_status acpi_run_oshp(acpi_handle handle)
/**
* acpi_get_hp_hw_control_from_firmware
* @dev: the pci_dev of the bridge that has a hotplug controller
* @pdev: the pci_dev of the bridge that has a hotplug controller
*
* Attempt to take hotplug control from firmware.
*/
@ -191,7 +191,7 @@ check_hotplug(acpi_handle handle, u32 lvl, void *context, void **rv)
/**
* acpi_pci_detect_ejectable - check if the PCI bus has ejectable slots
* @handle - handle of the PCI bus to scan
* @handle: handle of the PCI bus to scan
*
* Returns 1 if the PCI bus has ACPI based ejectable slots, 0 otherwise.
*/

1
drivers/pci/hotplug/pciehp_core.c
View File

@ -153,6 +153,7 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
/**
* pciehp_check_presence() - synthesize event if presence has changed
* @ctrl: controller to check
*
* On probe and resume, an explicit presence check is necessary to bring up an
* occupied slot or bring down an unoccupied slot. This can't be triggered by

6
drivers/pci/hotplug/rpadlpar_core.c
View File

@ -352,7 +352,7 @@ static int dlpar_remove_vio_slot(char *drc_name, struct device_node *dn)
* -ENODEV Not a valid drc_name
* -EIO Internal PCI Error
*/
int dlpar_remove_pci_slot(char *drc_name, struct device_node *dn)
static int dlpar_remove_pci_slot(char *drc_name, struct device_node *dn)
{
struct pci_bus *bus;
struct slot *slot;
@ -458,7 +458,7 @@ static inline int is_dlpar_capable(void)
return (int) (rc != RTAS_UNKNOWN_SERVICE);
}
int __init rpadlpar_io_init(void)
static int __init rpadlpar_io_init(void)
{
if (!is_dlpar_capable()) {
@ -470,7 +470,7 @@ int __init rpadlpar_io_init(void)
return dlpar_sysfs_init();
}
void rpadlpar_io_exit(void)
static void __exit rpadlpar_io_exit(void)
{
dlpar_sysfs_exit();
}

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