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pci-v4.13-changes

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Merge tag 'pci-v4.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:

  - add sysfs max_link_speed/width, current_link_speed/width (Wong Vee
    Khee)

  - make host bridge IRQ mapping much more generic (Matthew Minter,
    Lorenzo Pieralisi)

  - convert most drivers to pci_scan_root_bus_bridge() (Lorenzo
    Pieralisi)

  - mutex sriov_configure() (Jakub Kicinski)

  - mutex pci_error_handlers callbacks (Christoph Hellwig)

  - split ->reset_notify() into ->reset_prepare()/reset_done()
    (Christoph Hellwig)

  - support multiple PCIe portdrv interrupts for MSI as well as MSI-X
    (Gabriele Paoloni)

  - allocate MSI/MSI-X vector for Downstream Port Containment (Gabriele
    Paoloni)

  - fix MSI IRQ affinity pre/post/min_vecs issue (Michael Hernandez)

  - test INTx masking during enumeration, not at run-time (Piotr Gregor)

  - avoid using device_may_wakeup() for runtime PM (Rafael J. Wysocki)

  - restore the status of PCI devices across hibernation (Chen Yu)

  - keep parent resources that start at 0x0 (Ard Biesheuvel)

  - enable ECRC only if device supports it (Bjorn Helgaas)

  - restore PRI and PASID state after Function-Level Reset (CQ Tang)

  - skip DPC event if device is not present (Keith Busch)

  - check domain when matching SMBIOS info (Sujith Pandel)

  - mark Intel XXV710 NIC INTx masking as broken (Alex Williamson)

  - avoid AMD SB7xx EHCI USB wakeup defect (Kai-Heng Feng)

  - work around long-standing Macbook Pro poweroff issue (Bjorn Helgaas)

  - add Switchtec "running" status flag (Logan Gunthorpe)

  - fix dra7xx incorrect RW1C IRQ register usage (Arvind Yadav)

  - modify xilinx-nwl IRQ chip for legacy interrupts (Bharat Kumar
    Gogada)

  - move VMD SRCU cleanup after bus, child device removal (Jon Derrick)

  - add Faraday clock handling (Linus Walleij)

  - configure Rockchip MPS and reorganize (Shawn Lin)

  - limit Qualcomm TLP size to 2K (hardware issue) (Srinivas Kandagatla)

  - support Tegra MSI 64-bit addressing (Thierry Reding)

  - use Rockchip normal (not privileged) register bank (Shawn Lin)

  - add HiSilicon Kirin SoC PCIe controller driver (Xiaowei Song)

  - add Sigma Designs Tango SMP8759 PCIe controller driver (Marc
    Gonzalez)

  - add MediaTek PCIe host controller support (Ryder Lee)

  - add Qualcomm IPQ4019 support (John Crispin)

  - add HyperV vPCI protocol v1.2 support (Jork Loeser)

  - add i.MX6 regulator support (Quentin Schulz)

* tag 'pci-v4.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (113 commits)
  PCI: tango: Add Sigma Designs Tango SMP8759 PCIe host bridge support
  PCI: Add DT binding for Sigma Designs Tango PCIe controller
  PCI: rockchip: Use normal register bank for config accessors
  dt-bindings: PCI: Add documentation for MediaTek PCIe
  PCI: Remove __pci_dev_reset() and pci_dev_reset()
  PCI: Split ->reset_notify() method into ->reset_prepare() and ->reset_done()
  PCI: xilinx: Make of_device_ids const
  PCI: xilinx-nwl: Modify IRQ chip for legacy interrupts
  PCI: vmd: Move SRCU cleanup after bus, child device removal
  PCI: vmd: Correct comment: VMD domains start at 0x10000, not 0x1000
  PCI: versatile: Add local struct device pointers
  PCI: tegra: Do not allocate MSI target memory
  PCI: tegra: Support MSI 64-bit addressing
  PCI: rockchip: Use local struct device pointer consistently
  PCI: rockchip: Check for clk_prepare_enable() errors during resume
  MAINTAINERS: Remove Wenrui Li as Rockchip PCIe driver maintainer
  PCI: rockchip: Configure RC's MPS setting
  PCI: rockchip: Reconfigure configuration space header type
  PCI: rockchip: Split out rockchip_pcie_cfg_configuration_accesses()
  PCI: rockchip: Move configuration accesses into rockchip_pcie_cfg_atu()
  ...
This commit is contained in:
Linus Torvalds 2017-07-08 15:51:57 -07:00
commit f263fbb8d6
90 changed files with 3789 additions and 825 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
Documentation/devicetree/bindings/pci/faraday,ftpci100.txt
View file

@ -30,6 +30,13 @@ Mandatory properties:
128MB, 256MB, 512MB, 1GB or 2GB in size. The memory should be marked as
pre-fetchable.
Optional properties:
- clocks: when present, this should contain the peripheral clock (PCLK) and the
PCI clock (PCICLK). If these are not present, they are assumed to be
hard-wired enabled and always on. The PCI clock will be 33 or 66 MHz.
- clock-names: when present, this should contain "PCLK" for the peripheral
clock and "PCICLK" for the PCI-side clock.
Mandatory subnodes:
- For "faraday,ftpci100" a node representing the interrupt-controller inside the
host bridge is mandatory. It has the following mandatory properties:

4
Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt
View file

@ -33,6 +33,10 @@ Optional properties:
- reset-gpio-active-high: If present then the reset sequence using the GPIO
specified in the "reset-gpio" property is reversed (H=reset state,
L=operation state).
- vpcie-supply: Should specify the regulator in charge of PCIe port power.
The regulator will be enabled when initializing the PCIe host and
disabled either as part of the init process or when shutting down the
host.
Additional required properties for imx6sx-pcie:
- clock names: Must include the following additional entries:

130
Documentation/devicetree/bindings/pci/mediatek,mt7623-pcie.txt Normal file
View file

@ -0,0 +1,130 @@
MediaTek Gen2 PCIe controller which is available on MT7623 series SoCs
PCIe subsys supports single root complex (RC) with 3 Root Ports. Each root
ports supports a Gen2 1-lane Link and has PIPE interface to PHY.
Required properties:
- compatible: Should contain "mediatek,mt7623-pcie".
- device_type: Must be "pci"
- reg: Base addresses and lengths of the PCIe controller.
- #address-cells: Address representation for root ports (must be 3)
- #size-cells: Size representation for root ports (must be 2)
- #interrupt-cells: Size representation for interrupts (must be 1)
- interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties
Please refer to the standard PCI bus binding document for a more detailed
explanation.
- clocks: Must contain an entry for each entry in clock-names.
See ../clocks/clock-bindings.txt for details.
- clock-names: Must include the following entries:
- free_ck :for reference clock of PCIe subsys
- sys_ck0 :for clock of Port0
- sys_ck1 :for clock of Port1
- sys_ck2 :for clock of Port2
- resets: Must contain an entry for each entry in reset-names.
See ../reset/reset.txt for details.
- reset-names: Must include the following entries:
- pcie-rst0 :port0 reset
- pcie-rst1 :port1 reset
- pcie-rst2 :port2 reset
- phys: List of PHY specifiers (used by generic PHY framework).
- phy-names : Must be "pcie-phy0", "pcie-phy1", "pcie-phyN".. based on the
number of PHYs as specified in *phys* property.
- power-domains: A phandle and power domain specifier pair to the power domain
which is responsible for collapsing and restoring power to the peripheral.
- bus-range: Range of bus numbers associated with this controller.
- ranges: Ranges for the PCI memory and I/O regions.
In addition, the device tree node must have sub-nodes describing each
PCIe port interface, having the following mandatory properties:
Required properties:
- device_type: Must be "pci"
- reg: Only the first four bytes are used to refer to the correct bus number
and device number.
- #address-cells: Must be 3
- #size-cells: Must be 2
- #interrupt-cells: Must be 1
- interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties
Please refer to the standard PCI bus binding document for a more detailed
explanation.
- ranges: Sub-ranges distributed from the PCIe controller node. An empty
property is sufficient.
- num-lanes: Number of lanes to use for this port.
Examples:
hifsys: syscon@1a000000 {
compatible = "mediatek,mt7623-hifsys",
"mediatek,mt2701-hifsys",
"syscon";
reg = <0 0x1a000000 0 0x1000>;
#clock-cells = <1>;
#reset-cells = <1>;
};
pcie: pcie-controller@1a140000 {
compatible = "mediatek,mt7623-pcie";
device_type = "pci";
reg = <0 0x1a140000 0 0x1000>, /* PCIe shared registers */
<0 0x1a142000 0 0x1000>, /* Port0 registers */
<0 0x1a143000 0 0x1000>, /* Port1 registers */
<0 0x1a144000 0 0x1000>; /* Port2 registers */
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
interrupt-map-mask = <0xf800 0 0 0>;
interrupt-map = <0x0000 0 0 0 &sysirq GIC_SPI 193 IRQ_TYPE_LEVEL_LOW>,
<0x0800 0 0 0 &sysirq GIC_SPI 194 IRQ_TYPE_LEVEL_LOW>,
<0x1000 0 0 0 &sysirq GIC_SPI 195 IRQ_TYPE_LEVEL_LOW>;
clocks = <&topckgen CLK_TOP_ETHIF_SEL>,
<&hifsys CLK_HIFSYS_PCIE0>,
<&hifsys CLK_HIFSYS_PCIE1>,
<&hifsys CLK_HIFSYS_PCIE2>;
clock-names = "free_ck", "sys_ck0", "sys_ck1", "sys_ck2";
resets = <&hifsys MT2701_HIFSYS_PCIE0_RST>,
<&hifsys MT2701_HIFSYS_PCIE1_RST>,
<&hifsys MT2701_HIFSYS_PCIE2_RST>;
reset-names = "pcie-rst0", "pcie-rst1", "pcie-rst2";
phys = <&pcie0_phy>, <&pcie1_phy>, <&pcie2_phy>;
phy-names = "pcie-phy0", "pcie-phy1", "pcie-phy2";
power-domains = <&scpsys MT2701_POWER_DOMAIN_HIF>;
bus-range = <0x00 0xff>;
ranges = <0x81000000 0 0x1a160000 0 0x1a160000 0 0x00010000 /* I/O space */
0x83000000 0 0x60000000 0 0x60000000 0 0x10000000>; /* memory space */
pcie@0,0 {
device_type = "pci";
reg = <0x0000 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0>;
interrupt-map = <0 0 0 0 &sysirq GIC_SPI 193 IRQ_TYPE_LEVEL_LOW>;
ranges;
num-lanes = <1>;
};
pcie@1,0 {
device_type = "pci";
reg = <0x0800 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0>;
interrupt-map = <0 0 0 0 &sysirq GIC_SPI 194 IRQ_TYPE_LEVEL_LOW>;
ranges;
num-lanes = <1>;
};
pcie@2,0 {
device_type = "pci";
reg = <0x1000 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0>;
interrupt-map = <0 0 0 0 &sysirq GIC_SPI 195 IRQ_TYPE_LEVEL_LOW>;
ranges;
num-lanes = <1>;
};
};

20
Documentation/devicetree/bindings/pci/qcom,pcie.txt
View file

@ -8,6 +8,7 @@
- "qcom,pcie-apq8064" for apq8064
- "qcom,pcie-apq8084" for apq8084
- "qcom,pcie-msm8996" for msm8996 or apq8096
- "qcom,pcie-ipq4019" for ipq4019
- reg:
Usage: required
@ -87,7 +88,7 @@
- "core" Clocks the pcie hw block
- "phy" Clocks the pcie PHY block
- clock-names:
Usage: required for apq8084
Usage: required for apq8084/ipq4019
Value type: <stringlist>
Definition: Should contain the following entries
- "aux" Auxiliary (AUX) clock
@ -126,6 +127,23 @@
Definition: Should contain the following entries
- "core" Core reset
- reset-names:
Usage: required for ipq/apq8064
Value type: <stringlist>
Definition: Should contain the following entries
- "axi_m" AXI master reset
- "axi_s" AXI slave reset
- "pipe" PIPE reset
- "axi_m_vmid" VMID reset
- "axi_s_xpu" XPU reset
- "parf" PARF reset
- "phy" PHY reset
- "axi_m_sticky" AXI sticky reset
- "pipe_sticky" PIPE sticky reset
- "pwr" PWR reset
- "ahb" AHB reset
- "phy_ahb" PHY AHB reset
- power-domains:
Usage: required for apq8084 and msm8996/apq8096
Value type: <prop-encoded-array>

2
Documentation/devicetree/bindings/pci/rcar-pci.txt
View file

@ -1,4 +1,4 @@
* Renesas RCar PCIe interface
* Renesas R-Car PCIe interface
Required properties:
compatible: "renesas,pcie-r8a7779" for the R8A7779 SoC;

29
Documentation/devicetree/bindings/pci/tango-pcie.txt Normal file
View file

@ -0,0 +1,29 @@
Sigma Designs Tango PCIe controller
Required properties:
- compatible: "sigma,smp8759-pcie"
- reg: address/size of PCI configuration space, address/size of register area
- bus-range: defined by size of PCI configuration space
- device_type: "pci"
- #size-cells: <2>
- #address-cells: <3>
- msi-controller
- ranges: translation from system to bus addresses
- interrupts: spec for misc interrupts, spec for MSI
Example:
pcie@2e000 {
compatible = "sigma,smp8759-pcie";
reg = <0x50000000 0x400000>, <0x2e000 0x100>;
bus-range = <0 3>;
device_type = "pci";
#size-cells = <2>;
#address-cells = <3>;
msi-controller;
ranges = <0x02000000 0x0 0x00400000 0x50400000 0x0 0x3c00000>;
interrupts =
<54 IRQ_TYPE_LEVEL_HIGH>, /* misc interrupts */
<55 IRQ_TYPE_LEVEL_HIGH>; /* MSI */
};

1
Documentation/driver-model/devres.txt
View file

@ -348,6 +348,7 @@ PER-CPU MEM
devm_free_percpu()
PCI
devm_pci_alloc_host_bridge() : managed PCI host bridge allocation
devm_pci_remap_cfgspace() : ioremap PCI configuration space
devm_pci_remap_cfg_resource() : ioremap PCI configuration space resource
pcim_enable_device() : after success, all PCI ops become managed

17
MAINTAINERS
View file

@ -10160,9 +10160,16 @@ S: Maintained
F: Documentation/devicetree/bindings/pci/hisilicon-pcie.txt
F: drivers/pci/dwc/pcie-hisi.c
PCIE DRIVER FOR HISILICON KIRIN
M: Xiaowei Song <songxiaowei@hisilicon.com>
M: Binghui Wang <wangbinghui@hisilicon.com>
L: linux-pci@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/pci/pcie-kirin.txt
F: drivers/pci/dwc/pcie-kirin.c
PCIE DRIVER FOR ROCKCHIP
M: Shawn Lin <shawn.lin@rock-chips.com>
M: Wenrui Li <wenrui.li@rock-chips.com>
L: linux-pci@vger.kernel.org
L: linux-rockchip@lists.infradead.org
S: Maintained
@ -10184,6 +10191,14 @@ S: Supported
F: Documentation/devicetree/bindings/pci/pci-thunder-*
F: drivers/pci/host/pci-thunder-*
PCIE DRIVER FOR MEDIATEK
M: Ryder Lee <ryder.lee@mediatek.com>
L: linux-pci@vger.kernel.org
L: linux-mediatek@lists.infradead.org
S: Supported
F: Documentation/devicetree/bindings/pci/mediatek*
F: drivers/pci/host/*mediatek*
PCMCIA SUBSYSTEM
P: Linux PCMCIA Team
L: linux-pcmcia@lists.infradead.org

3
arch/arm/include/asm/mach/pci.h
View file

@ -16,6 +16,7 @@
struct pci_sys_data;
struct pci_ops;
struct pci_bus;
struct pci_host_bridge;
struct device;
struct hw_pci {
@ -25,7 +26,7 @@ struct hw_pci {
unsigned int io_optional:1;
void **private_data;
int (*setup)(int nr, struct pci_sys_data *);
struct pci_bus *(*scan)(int nr, struct pci_sys_data *);
int (*scan)(int nr, struct pci_host_bridge *);
void (*preinit)(void);
void (*postinit)(void);
u8 (*swizzle)(struct pci_dev *dev, u8 *pin);

46
arch/arm/kernel/bios32.c
View file

@ -458,10 +458,14 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
int nr, busnr;
for (nr = busnr = 0; nr < hw->nr_controllers; nr++) {
sys = kzalloc(sizeof(struct pci_sys_data), GFP_KERNEL);
if (WARN(!sys, "PCI: unable to allocate sys data!"))
struct pci_host_bridge *bridge;
bridge = pci_alloc_host_bridge(sizeof(struct pci_sys_data));
if (WARN(!bridge, "PCI: unable to allocate bridge!"))
break;
sys = pci_host_bridge_priv(bridge);
sys->busnr = busnr;
sys->swizzle = hw->swizzle;
sys->map_irq = hw->map_irq;
@ -473,7 +477,6 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
ret = hw->setup(nr, sys);
if (ret > 0) {
struct pci_host_bridge *host_bridge;
ret = pcibios_init_resource(nr, sys, hw->io_optional);
if (ret) {
@ -481,26 +484,37 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
break;
}
if (hw->scan)
sys->bus = hw->scan(nr, sys);
else
sys->bus = pci_scan_root_bus_msi(parent,
sys->busnr, hw->ops, sys,
&sys->resources, hw->msi_ctrl);
bridge->map_irq = pcibios_map_irq;
bridge->swizzle_irq = pcibios_swizzle;
if (WARN(!sys->bus, "PCI: unable to scan bus!")) {
kfree(sys);
if (hw->scan)
ret = hw->scan(nr, bridge);
else {
list_splice_init(&sys->resources,
&bridge->windows);
bridge->dev.parent = parent;
bridge->sysdata = sys;
bridge->busnr = sys->busnr;
bridge->ops = hw->ops;
bridge->msi = hw->msi_ctrl;
bridge->align_resource =
hw->align_resource;
ret = pci_scan_root_bus_bridge(bridge);
}
if (WARN(ret < 0, "PCI: unable to scan bus!")) {
pci_free_host_bridge(bridge);
break;
}
sys->bus = bridge->bus;
busnr = sys->bus->busn_res.end + 1;
list_add(&sys->node, head);
host_bridge = pci_find_host_bridge(sys->bus);
host_bridge->align_resource = hw->align_resource;
} else {
kfree(sys);
pci_free_host_bridge(bridge);
if (ret < 0)
break;
}
@ -519,8 +533,6 @@ void pci_common_init_dev(struct device *parent, struct hw_pci *hw)
if (hw->postinit)
hw->postinit();
pci_fixup_irqs(pcibios_swizzle, pcibios_map_irq);
list_for_each_entry(sys, &head, node) {
struct pci_bus *bus = sys->bus;

17
arch/arm/mach-dove/pcie.c
View file

@ -152,16 +152,23 @@ static void rc_pci_fixup(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL, PCI_ANY_ID, rc_pci_fixup);
static struct pci_bus __init *
dove_pcie_scan_bus(int nr, struct pci_sys_data *sys)
static int __init
dove_pcie_scan_bus(int nr, struct pci_host_bridge *bridge)
{
struct pci_sys_data *sys = pci_host_bridge_priv(bridge);
if (nr >= num_pcie_ports) {
BUG();
return NULL;
return -EINVAL;
}
return pci_scan_root_bus(NULL, sys->busnr, &pcie_ops, sys,
&sys->resources);
list_splice_init(&sys->resources, &bridge->windows);
bridge->dev.parent = NULL;
bridge->sysdata = sys;
bridge->busnr = sys->busnr;
bridge->ops = &pcie_ops;
return pci_scan_root_bus_bridge(bridge);
}
static int __init dove_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)

31
arch/arm/mach-iop13xx/pci.c
View file

@ -504,10 +504,10 @@ iop13xx_pci_abort(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
/* Scan an IOP13XX PCI bus. nr selects which ATU we use.
*/
struct pci_bus *iop13xx_scan_bus(int nr, struct pci_sys_data *sys)
int iop13xx_scan_bus(int nr, struct pci_host_bridge *bridge)
{
int which_atu;
struct pci_bus *bus = NULL;
int which_atu, ret;
struct pci_sys_data *sys = pci_host_bridge_priv(bridge);
switch (init_atu) {
case IOP13XX_INIT_ATU_ATUX:
@ -525,9 +525,14 @@ struct pci_bus *iop13xx_scan_bus(int nr, struct pci_sys_data *sys)
if (!which_atu) {
BUG();
return NULL;
return -ENODEV;
}
list_splice_init(&sys->resources, &bridge->windows);
bridge->dev.parent = NULL;
bridge->sysdata = sys;
bridge->busnr = sys->busnr;
switch (which_atu) {
case IOP13XX_INIT_ATU_ATUX:
if (time_after_eq(jiffies + msecs_to_jiffies(1000),
@ -535,18 +540,22 @@ struct pci_bus *iop13xx_scan_bus(int nr, struct pci_sys_data *sys)
while(time_before(jiffies, atux_trhfa_timeout))
udelay(100);
bus = pci_bus_atux = pci_scan_root_bus(NULL, sys->busnr,
&iop13xx_atux_ops,
sys, &sys->resources);
bridge->ops = &iop13xx_atux_ops;
ret = pci_scan_root_bus_bridge(bridge);
if (!ret)
pci_bus_atux = bridge->bus;
break;
case IOP13XX_INIT_ATU_ATUE:
bus = pci_bus_atue = pci_scan_root_bus(NULL, sys->busnr,
&iop13xx_atue_ops,
sys, &sys->resources);
bridge->ops = &iop13xx_atue_ops;
ret = pci_scan_root_bus_bridge(bridge);
if (!ret)
pci_bus_atue = bridge->bus;
break;
default:
ret = -EINVAL;
}
return bus;
return ret;
}
/* This function is called from iop13xx_pci_init() after assigning valid

3
arch/arm/mach-iop13xx/pci.h
View file

@ -11,9 +11,10 @@ extern size_t iop13xx_atue_mem_size;
extern size_t iop13xx_atux_mem_size;
struct pci_sys_data;
struct pci_host_bridge;
struct hw_pci;
int iop13xx_pci_setup(int nr, struct pci_sys_data *sys);
struct pci_bus *iop13xx_scan_bus(int nr, struct pci_sys_data *);
int iop13xx_scan_bus(int nr, struct pci_host_bridge *bridge);
void iop13xx_atu_select(struct hw_pci *plat_pci);
void iop13xx_pci_init(void);
void iop13xx_map_pci_memory(void);

16
arch/arm/mach-mv78xx0/pcie.c
View file

@ -194,16 +194,22 @@ static void rc_pci_fixup(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL, PCI_ANY_ID, rc_pci_fixup);
static struct pci_bus __init *
mv78xx0_pcie_scan_bus(int nr, struct pci_sys_data *sys)
static int __init mv78xx0_pcie_scan_bus(int nr, struct pci_host_bridge *bridge)
{
struct pci_sys_data *sys = pci_host_bridge_priv(bridge);
if (nr >= num_pcie_ports) {
BUG();
return NULL;
return -EINVAL;
}
return pci_scan_root_bus(NULL, sys->busnr, &pcie_ops, sys,
&sys->resources);
list_splice_init(&sys->resources, &bridge->windows);
bridge->dev.parent = NULL;
bridge->sysdata = sys;
bridge->busnr = sys->busnr;
bridge->ops = &pcie_ops;
return pci_scan_root_bus_bridge(bridge);
}
static int __init mv78xx0_pcie_map_irq(const struct pci_dev *dev, u8 slot,

3
arch/arm/mach-orion5x/common.h
View file

@ -54,6 +54,7 @@ void orion5x_restart(enum reboot_mode, const char *);
* PCIe/PCI functions.
*/
struct pci_bus;
struct pci_host_bridge;
struct pci_sys_data;
struct pci_dev;
@ -61,7 +62,7 @@ void orion5x_pcie_id(u32 *dev, u32 *rev);
void orion5x_pci_disable(void);
void orion5x_pci_set_cardbus_mode(void);
int orion5x_pci_sys_setup(int nr, struct pci_sys_data *sys);
struct pci_bus *orion5x_pci_sys_scan_bus(int nr, struct pci_sys_data *sys);
int orion5x_pci_sys_scan_bus(int nr, struct pci_host_bridge *bridge);
int orion5x_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
struct tag;

25
arch/arm/mach-orion5x/pci.c
View file

@ -555,18 +555,27 @@ int __init orion5x_pci_sys_setup(int nr, struct pci_sys_data *sys)
return 0;
}
struct pci_bus __init *orion5x_pci_sys_scan_bus(int nr, struct pci_sys_data *sys)
int __init orion5x_pci_sys_scan_bus(int nr, struct pci_host_bridge *bridge)
{
if (nr == 0)
return pci_scan_root_bus(NULL, sys->busnr, &pcie_ops, sys,
&sys->resources);
struct pci_sys_data *sys = pci_host_bridge_priv(bridge);
if (nr == 1 && !orion5x_pci_disabled)
return pci_scan_root_bus(NULL, sys->busnr, &pci_ops, sys,
&sys->resources);
list_splice_init(&sys->resources, &bridge->windows);
bridge->dev.parent = NULL;
bridge->sysdata = sys;
bridge->busnr = sys->busnr;
if (nr == 0) {
bridge->ops = &pcie_ops;
return pci_scan_root_bus_bridge(bridge);
}
if (nr == 1 && !orion5x_pci_disabled) {
bridge->ops = &pci_ops;
return pci_scan_root_bus_bridge(bridge);
}
BUG();
return NULL;
return -ENODEV;
}
int __init orion5x_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)

10
arch/arm64/kernel/pci.c
View file

@ -39,20 +39,18 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
return res->start;
}
#ifdef CONFIG_ACPI
/*
* Try to assign the IRQ number when probing a new device
*/
int pcibios_alloc_irq(struct pci_dev *dev)
{
if (acpi_disabled)
dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
#ifdef CONFIG_ACPI
else
return acpi_pci_irq_enable(dev);
#endif
if (!acpi_disabled)
acpi_pci_irq_enable(dev);
return 0;
}
#endif
/*
* raw_pci_read/write - Platform-specific PCI config space access.

1
arch/mips/include/asm/mach-loongson64/cs5536/cs5536_pci.h
View file

@ -80,7 +80,6 @@ extern u32 cs5536_pci_conf_read4(int function, int reg);
#define PCI_BAR3_REG 0x1c
#define PCI_BAR4_REG 0x20
#define PCI_BAR5_REG 0x24
#define PCI_BAR_COUNT 6
#define PCI_BAR_RANGE_MASK 0xFFFFFFFF
/* CARDBUS CIS POINTER */

1
arch/mips/include/asm/pci.h
View file

@ -39,7 +39,6 @@ struct pci_controller {
unsigned long io_offset;
unsigned long io_map_base;
struct resource *busn_resource;
unsigned long busn_offset;
#ifndef CONFIG_PCI_DOMAINS_GENERIC
unsigned int index;

3
arch/mips/pci/pci-legacy.c
View file

@ -86,8 +86,7 @@ static void pcibios_scanbus(struct pci_controller *hose)
hose->mem_resource, hose->mem_offset);
pci_add_resource_offset(&resources,
hose->io_resource, hose->io_offset);
pci_add_resource_offset(&resources,
hose->busn_resource, hose->busn_offset);
pci_add_resource(&resources, hose->busn_resource);
bus = pci_scan_root_bus(NULL, next_busno, hose->pci_ops, hose,
&resources);
hose->bus = bus;

6
arch/x86/include/uapi/asm/hyperv.h
View file

@ -149,6 +149,12 @@
*/
#define HV_X64_DEPRECATING_AEOI_RECOMMENDED (1 << 9)
/*
* HV_VP_SET available
*/
#define HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED (1 << 11)
/*
* Crash notification flag.
*/

27
arch/x86/pci/common.c
View file

@ -24,7 +24,6 @@ unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 |
unsigned int pci_early_dump_regs;
static int pci_bf_sort;
static int smbios_type_b1_flag;
int pci_routeirq;
int noioapicquirk;
#ifdef CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS
@ -197,34 +196,18 @@ static int __init set_bf_sort(const struct dmi_system_id *d)
static void __init read_dmi_type_b1(const struct dmi_header *dm,
void *private_data)
{
u8 *d = (u8 *)dm + 4;
u8 *data = (u8 *)dm + 4;
if (dm->type != 0xB1)
return;
switch (((*(u32 *)d) >> 9) & 0x03) {
case 0x00:
printk(KERN_INFO "dmi type 0xB1 record - unknown flag\n");
break;
case 0x01: /* set pci=bfsort */
smbios_type_b1_flag = 1;
break;
case 0x02: /* do not set pci=bfsort */
smbios_type_b1_flag = 2;
break;
default:
break;
}
if ((((*(u32 *)data) >> 9) & 0x03) == 0x01)
set_bf_sort((const struct dmi_system_id *)private_data);
}
static int __init find_sort_method(const struct dmi_system_id *d)
{
dmi_walk(read_dmi_type_b1, NULL);
if (smbios_type_b1_flag == 1) {
set_bf_sort(d);
return 0;
}
return -1;
dmi_walk(read_dmi_type_b1, (void *)d);
return 0;
}
/*

47
arch/x86/pci/fixup.c
View file

@ -571,3 +571,50 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2fc0, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6f60, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fa0, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fc0, pci_invalid_bar);
/*
* Device [1022:7808]
* 23. USB Wake on Connect/Disconnect with Low Speed Devices
* https://support.amd.com/TechDocs/46837.pdf
* Appendix A2
* https://support.amd.com/TechDocs/42413.pdf
*/
static void pci_fixup_amd_ehci_pme(struct pci_dev *dev)
{
dev_info(&dev->dev, "PME# does not work under D3, disabling it\n");
dev->pme_support &= ~((PCI_PM_CAP_PME_D3 | PCI_PM_CAP_PME_D3cold)
>> PCI_PM_CAP_PME_SHIFT);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x7808, pci_fixup_amd_ehci_pme);
/*
* Apple MacBook Pro: Avoid [mem 0x7fa00000-0x7fbfffff]
*
* Using the [mem 0x7fa00000-0x7fbfffff] region, e.g., by assigning it to
* the 00:1c.0 Root Port, causes a conflict with [io 0x1804], which is used
* for soft poweroff and suspend-to-RAM.
*
* As far as we know, this is related to the address space, not to the Root
* Port itself. Attaching the quirk to the Root Port is a convenience, but
* it could probably also be a standalone DMI quirk.
*
* https://bugzilla.kernel.org/show_bug.cgi?id=103211
*/
static void quirk_apple_mbp_poweroff(struct pci_dev *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
if ((!dmi_match(DMI_PRODUCT_NAME, "MacBookPro11,4") &&
!dmi_match(DMI_PRODUCT_NAME, "MacBookPro11,5")) ||
pdev->bus->number != 0 || pdev->devfn != PCI_DEVFN(0x1c, 0))
return;
res = request_mem_region(0x7fa00000, 0x200000,
"MacBook Pro poweroff workaround");
if (res)
dev_info(dev, "claimed %s %pR\n", res->name, res);
else
dev_info(dev, "can't work around MacBook Pro poweroff issue\n");
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x8c10, quirk_apple_mbp_poweroff);

2
arch/x86/pci/pcbios.c
View file

@ -46,7 +46,7 @@ static inline void set_bios_x(void)
pcibios_enabled = 1;
set_memory_x(PAGE_OFFSET + BIOS_BEGIN, (BIOS_END - BIOS_BEGIN) >> PAGE_SHIFT);
if (__supported_pte_mask & _PAGE_NX)
printk(KERN_INFO "PCI : PCI BIOS area is rw and x. Use pci=nobios if you want it NX.\n");
printk(KERN_INFO "PCI: PCI BIOS area is rw and x. Use pci=nobios if you want it NX.\n");
}
/*

4
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View file

@ -1152,16 +1152,12 @@ static void amdgpu_switcheroo_set_state(struct pci_dev *pdev, enum vga_switchero
return;
if (state == VGA_SWITCHEROO_ON) {
unsigned d3_delay = dev->pdev->d3_delay;
pr_info("amdgpu: switched on\n");
/* don't suspend or resume card normally */
dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
amdgpu_device_resume(dev, true, true);
dev->pdev->d3_delay = d3_delay;
dev->switch_power_state = DRM_SWITCH_POWER_ON;
drm_kms_helper_poll_enable(dev);
} else {

11
drivers/gpu/drm/radeon/radeon_device.c
View file

@ -113,7 +113,6 @@ static inline bool radeon_is_atpx_hybrid(void) { return false; }
#endif
#define RADEON_PX_QUIRK_DISABLE_PX (1 << 0)
#define RADEON_PX_QUIRK_LONG_WAKEUP (1 << 1)
struct radeon_px_quirk {
u32 chip_vendor;
@ -140,8 +139,6 @@ static struct radeon_px_quirk radeon_px_quirk_list[] = {
* https://bugs.freedesktop.org/show_bug.cgi?id=101491
*/
{ PCI_VENDOR_ID_ATI, 0x6741, 0x1043, 0x2122, RADEON_PX_QUIRK_DISABLE_PX },
/* macbook pro 8.2 */
{ PCI_VENDOR_ID_ATI, 0x6741, PCI_VENDOR_ID_APPLE, 0x00e2, RADEON_PX_QUIRK_LONG_WAKEUP },
{ 0, 0, 0, 0, 0 },
};
@ -1245,25 +1242,17 @@ static void radeon_check_arguments(struct radeon_device *rdev)
static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
{
struct drm_device *dev = pci_get_drvdata(pdev);
struct radeon_device *rdev = dev->dev_private;
if (radeon_is_px(dev) && state == VGA_SWITCHEROO_OFF)
return;
if (state == VGA_SWITCHEROO_ON) {
unsigned d3_delay = dev->pdev->d3_delay;
pr_info("radeon: switched on\n");
/* don't suspend or resume card normally */
dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
if (d3_delay < 20 && (rdev->px_quirk_flags & RADEON_PX_QUIRK_LONG_WAKEUP))
dev->pdev->d3_delay = 20;
radeon_resume_kms(dev, true, true);
dev->pdev->d3_delay = d3_delay;
dev->switch_power_state = DRM_SWITCH_POWER_ON;
drm_kms_helper_poll_enable(dev);
} else {

36
drivers/net/ethernet/intel/fm10k/fm10k_pci.c
View file

@ -2348,30 +2348,19 @@ static void fm10k_io_resume(struct pci_dev *pdev)
netif_device_attach(netdev);
}
/**
* fm10k_io_reset_notify - called when PCI function is reset
* @pdev: Pointer to PCI device
*
* This callback is called when the PCI function is reset such as from
* /sys/class/net/<enpX>/device/reset or similar. When prepare is true, it
* means we should prepare for a function reset. If prepare is false, it means
* the function reset just occurred.
*/
static void fm10k_io_reset_notify(struct pci_dev *pdev, bool prepare)
static void fm10k_io_reset_prepare(struct pci_dev *pdev)
{
/* warn incase we have any active VF devices */
if (pci_num_vf(pdev))
dev_warn(&pdev->dev,
"PCIe FLR may cause issues for any active VF devices\n");
fm10k_prepare_suspend(pci_get_drvdata(pdev));
}
static void fm10k_io_reset_done(struct pci_dev *pdev)
{
struct fm10k_intfc *interface = pci_get_drvdata(pdev);
int err = 0;
if (prepare) {
/* warn incase we have any active VF devices */
if (pci_num_vf(pdev))
dev_warn(&pdev->dev,
"PCIe FLR may cause issues for any active VF devices\n");
fm10k_prepare_suspend(interface);
} else {
err = fm10k_handle_resume(interface);
}
int err = fm10k_handle_resume(interface);
if (err) {
dev_warn(&pdev->dev,
@ -2384,7 +2373,8 @@ static const struct pci_error_handlers fm10k_err_handler = {
.error_detected = fm10k_io_error_detected,
.slot_reset = fm10k_io_slot_reset,
.resume = fm10k_io_resume,
.reset_notify = fm10k_io_reset_notify,
.reset_prepare = fm10k_io_reset_prepare,
.reset_done = fm10k_io_reset_done,
};
static struct pci_driver fm10k_driver = {

69
drivers/net/wireless/marvell/mwifiex/pcie.c
View file

@ -346,7 +346,36 @@ static const struct pci_device_id mwifiex_ids[] = {
MODULE_DEVICE_TABLE(pci, mwifiex_ids);
static void mwifiex_pcie_reset_notify(struct pci_dev *pdev, bool prepare)
/*
* Cleanup all software without cleaning anything related to PCIe and HW.
*/
static void mwifiex_pcie_reset_prepare(struct pci_dev *pdev)
{
struct pcie_service_card *card = pci_get_drvdata(pdev);
struct mwifiex_adapter *adapter = card->adapter;
if (!adapter) {
dev_err(&pdev->dev, "%s: adapter structure is not valid\n",
__func__);
return;
}
mwifiex_dbg(adapter, INFO,
"%s: vendor=0x%4.04x device=0x%4.04x rev=%d Pre-FLR\n",
__func__, pdev->vendor, pdev->device, pdev->revision);
mwifiex_shutdown_sw(adapter);
clear_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &card->work_flags);
clear_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &card->work_flags);
mwifiex_dbg(adapter, INFO, "%s, successful\n", __func__);
}
/*
* Kernel stores and restores PCIe function context before and after performing
* FLR respectively. Reconfigure the software and firmware including firmware
* redownload.
*/
static void mwifiex_pcie_reset_done(struct pci_dev *pdev)
{
struct pcie_service_card *card = pci_get_drvdata(pdev);
struct mwifiex_adapter *adapter = card->adapter;
@ -359,35 +388,19 @@ static void mwifiex_pcie_reset_notify(struct pci_dev *pdev, bool prepare)
}
mwifiex_dbg(adapter, INFO,
"%s: vendor=0x%4.04x device=0x%4.04x rev=%d %s\n",
__func__, pdev->vendor, pdev->device,
pdev->revision,
prepare ? "Pre-FLR" : "Post-FLR");
"%s: vendor=0x%4.04x device=0x%4.04x rev=%d Post-FLR\n",
__func__, pdev->vendor, pdev->device, pdev->revision);
if (prepare) {
/* Kernel would be performing FLR after this notification.
* Cleanup all software without cleaning anything related to
* PCIe and HW.
*/
mwifiex_shutdown_sw(adapter);
clear_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &card->work_flags);
clear_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &card->work_flags);
} else {
/* Kernel stores and restores PCIe function context before and
* after performing FLR respectively. Reconfigure the software
* and firmware including firmware redownload
*/
ret = mwifiex_reinit_sw(adapter);
if (ret) {
dev_err(&pdev->dev, "reinit failed: %d\n", ret);
return;
}
}
mwifiex_dbg(adapter, INFO, "%s, successful\n", __func__);
ret = mwifiex_reinit_sw(adapter);
if (ret)
dev_err(&pdev->dev, "reinit failed: %d\n", ret);
else
mwifiex_dbg(adapter, INFO, "%s, successful\n", __func__);
}
static const struct pci_error_handlers mwifiex_pcie_err_handler[] = {
{ .reset_notify = mwifiex_pcie_reset_notify, },
static const struct pci_error_handlers mwifiex_pcie_err_handler = {
.reset_prepare = mwifiex_pcie_reset_prepare,
.reset_done = mwifiex_pcie_reset_done,
};
#ifdef CONFIG_PM_SLEEP
@ -408,7 +421,7 @@ static struct pci_driver __refdata mwifiex_pcie = {
},
#endif
.shutdown = mwifiex_pcie_shutdown,
.err_handler = mwifiex_pcie_err_handler,
.err_handler = &mwifiex_pcie_err_handler,
};
/*

15
drivers/nvme/host/pci.c
View file

@ -2303,14 +2303,16 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
return result;
}
static void nvme_reset_notify(struct pci_dev *pdev, bool prepare)
static void nvme_reset_prepare(struct pci_dev *pdev)
{
struct nvme_dev *dev = pci_get_drvdata(pdev);
nvme_dev_disable(dev, false);
}
if (prepare)
nvme_dev_disable(dev, false);
else
nvme_reset_ctrl(&dev->ctrl);
static void nvme_reset_done(struct pci_dev *pdev)
{
struct nvme_dev *dev = pci_get_drvdata(pdev);
nvme_reset_ctrl(&dev->ctrl);
}
static void nvme_shutdown(struct pci_dev *pdev)
@ -2434,7 +2436,8 @@ static const struct pci_error_handlers nvme_err_handler = {
.error_detected = nvme_error_detected,
.slot_reset = nvme_slot_reset,
.resume = nvme_error_resume,
.reset_notify = nvme_reset_notify,
.reset_prepare = nvme_reset_prepare,
.reset_done = nvme_reset_done,
};
static const struct pci_device_id nvme_id_table[] = {

3
drivers/of/of_pci_irq.c
View file

@ -113,7 +113,8 @@ EXPORT_SYMBOL_GPL(of_irq_parse_pci);
* @pin: PCI irq pin number; passed when used as map_irq callback. Unused
*
* @slot and @pin are unused, but included in the function so that this
* function can be used directly as the map_irq callback to pci_fixup_irqs().
* function can be used directly as the map_irq callback to
* pci_assign_irq() and struct pci_host_bridge.map_irq pointer
*/
int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin)
{

17
drivers/pci/Makefile
View file

@ -4,7 +4,8 @@
obj-y += access.o bus.o probe.o host-bridge.o remove.o pci.o \
pci-driver.o search.o pci-sysfs.o rom.o setup-res.o \
irq.o vpd.o setup-bus.o vc.o mmap.o
irq.o vpd.o setup-bus.o vc.o mmap.o setup-irq.o
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_SYSFS) += slot.o
@ -28,20 +29,6 @@ obj-$(CONFIG_HT_IRQ) += htirq.o
obj-$(CONFIG_PCI_ATS) += ats.o
obj-$(CONFIG_PCI_IOV) += iov.o
#
# Some architectures use the generic PCI setup functions
#
obj-$(CONFIG_ALPHA) += setup-irq.o
obj-$(CONFIG_ARC) += setup-irq.o
obj-$(CONFIG_ARM) += setup-irq.o
obj-$(CONFIG_ARM64) += setup-irq.o
obj-$(CONFIG_UNICORE32) += setup-irq.o
obj-$(CONFIG_SUPERH) += setup-irq.o
obj-$(CONFIG_MIPS) += setup-irq.o
obj-$(CONFIG_TILE) += setup-irq.o
obj-$(CONFIG_SPARC_LEON) += setup-irq.o
obj-$(CONFIG_M68K) += setup-irq.o
#
# ACPI Related PCI FW Functions
# ACPI _DSM provided firmware instance and string name

87
drivers/pci/ats.c
View file

@ -153,23 +153,27 @@ int pci_enable_pri(struct pci_dev *pdev, u32 reqs)
u32 max_requests;
int pos;
if (WARN_ON(pdev->pri_enabled))
return -EBUSY;
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI);
if (!pos)
return -EINVAL;
pci_read_config_word(pdev, pos + PCI_PRI_CTRL, &control);
pci_read_config_word(pdev, pos + PCI_PRI_STATUS, &status);
if ((control & PCI_PRI_CTRL_ENABLE) ||
!(status & PCI_PRI_STATUS_STOPPED))
if (!(status & PCI_PRI_STATUS_STOPPED))
return -EBUSY;
pci_read_config_dword(pdev, pos + PCI_PRI_MAX_REQ, &max_requests);
reqs = min(max_requests, reqs);
pdev->pri_reqs_alloc = reqs;
pci_write_config_dword(pdev, pos + PCI_PRI_ALLOC_REQ, reqs);
control |= PCI_PRI_CTRL_ENABLE;
control = PCI_PRI_CTRL_ENABLE;
pci_write_config_word(pdev, pos + PCI_PRI_CTRL, control);
pdev->pri_enabled = 1;
return 0;
}
EXPORT_SYMBOL_GPL(pci_enable_pri);
@ -185,6 +189,9 @@ void pci_disable_pri(struct pci_dev *pdev)
u16 control;
int pos;
if (WARN_ON(!pdev->pri_enabled))
return;
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI);
if (!pos)
return;
@ -192,9 +199,33 @@ void pci_disable_pri(struct pci_dev *pdev)
pci_read_config_word(pdev, pos + PCI_PRI_CTRL, &control);
control &= ~PCI_PRI_CTRL_ENABLE;
pci_write_config_word(pdev, pos + PCI_PRI_CTRL, control);
pdev->pri_enabled = 0;
}
EXPORT_SYMBOL_GPL(pci_disable_pri);
/**
* pci_restore_pri_state - Restore PRI
* @pdev: PCI device structure
*/
void pci_restore_pri_state(struct pci_dev *pdev)
{
u16 control = PCI_PRI_CTRL_ENABLE;
u32 reqs = pdev->pri_reqs_alloc;
int pos;
if (!pdev->pri_enabled)
return;
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI);
if (!pos)
return;
pci_write_config_dword(pdev, pos + PCI_PRI_ALLOC_REQ, reqs);
pci_write_config_word(pdev, pos + PCI_PRI_CTRL, control);
}
EXPORT_SYMBOL_GPL(pci_restore_pri_state);
/**
* pci_reset_pri - Resets device's PRI state
* @pdev: PCI device structure
@ -207,16 +238,14 @@ int pci_reset_pri(struct pci_dev *pdev)
u16 control;
int pos;
if (WARN_ON(pdev->pri_enabled))
return -EBUSY;
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI);
if (!pos)
return -EINVAL;
pci_read_config_word(pdev, pos + PCI_PRI_CTRL, &control);
if (control & PCI_PRI_CTRL_ENABLE)
return -EBUSY;
control |= PCI_PRI_CTRL_RESET;
control = PCI_PRI_CTRL_RESET;
pci_write_config_word(pdev, pos + PCI_PRI_CTRL, control);
return 0;
@ -239,16 +268,14 @@ int pci_enable_pasid(struct pci_dev *pdev, int features)
u16 control, supported;
int pos;
if (WARN_ON(pdev->pasid_enabled))
return -EBUSY;
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PASID);
if (!pos)
return -EINVAL;
pci_read_config_word(pdev, pos + PCI_PASID_CTRL, &control);
pci_read_config_word(pdev, pos + PCI_PASID_CAP, &supported);
if (control & PCI_PASID_CTRL_ENABLE)
return -EINVAL;
supported &= PCI_PASID_CAP_EXEC | PCI_PASID_CAP_PRIV;
/* User wants to enable anything unsupported? */
@ -256,9 +283,12 @@ int pci_enable_pasid(struct pci_dev *pdev, int features)
return -EINVAL;
control = PCI_PASID_CTRL_ENABLE | features;
pdev->pasid_features = features;
pci_write_config_word(pdev, pos + PCI_PASID_CTRL, control);
pdev->pasid_enabled = 1;
return 0;
}
EXPORT_SYMBOL_GPL(pci_enable_pasid);
@ -266,21 +296,46 @@ EXPORT_SYMBOL_GPL(pci_enable_pasid);
/**
* pci_disable_pasid - Disable the PASID capability
* @pdev: PCI device structure
*
*/
void pci_disable_pasid(struct pci_dev *pdev)
{
u16 control = 0;
int pos;
if (WARN_ON(!pdev->pasid_enabled))
return;
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PASID);
if (!pos)
return;
pci_write_config_word(pdev, pos + PCI_PASID_CTRL, control);
pdev->pasid_enabled = 0;
}
EXPORT_SYMBOL_GPL(pci_disable_pasid);
/**
* pci_restore_pasid_state - Restore PASID capabilities
* @pdev: PCI device structure
*/
void pci_restore_pasid_state(struct pci_dev *pdev)
{
u16 control;
int pos;
if (!pdev->pasid_enabled)
return;
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PASID);
if (!pos)
return;
control = PCI_PASID_CTRL_ENABLE | pdev->pasid_features;
pci_write_config_word(pdev, pos + PCI_PASID_CTRL, control);
}
EXPORT_SYMBOL_GPL(pci_restore_pasid_state);
/**
* pci_pasid_features - Check which PASID features are supported
* @pdev: PCI device structure

11
drivers/pci/dwc/Kconfig
View file

@ -16,6 +16,7 @@ config PCIE_DW_EP
config PCI_DRA7XX
bool "TI DRA7xx PCIe controller"
depends on SOC_DRA7XX || COMPILE_TEST
depends on (PCI && PCI_MSI_IRQ_DOMAIN) || PCI_ENDPOINT
depends on OF && HAS_IOMEM && TI_PIPE3
help
@ -158,4 +159,14 @@ config PCIE_ARTPEC6
Say Y here to enable PCIe controller support on Axis ARTPEC-6
SoCs. This PCIe controller uses the DesignWare core.
config PCIE_KIRIN
depends on OF && ARM64
bool "HiSilicon Kirin series SoCs PCIe controllers"
depends on PCI
select PCIEPORTBUS
select PCIE_DW_HOST
help
Say Y here if you want PCIe controller support
on HiSilicon Kirin series SoCs.
endmenu

1
drivers/pci/dwc/Makefile
View file

@ -13,6 +13,7 @@ obj-$(CONFIG_PCI_LAYERSCAPE) += pci-layerscape.o
obj-$(CONFIG_PCIE_QCOM) += pcie-qcom.o
obj-$(CONFIG_PCIE_ARMADA_8K) += pcie-armada8k.o
obj-$(CONFIG_PCIE_ARTPEC6) += pcie-artpec6.o
obj-$(CONFIG_PCIE_KIRIN) += pcie-kirin.o
# The following drivers are for devices that use the generic ACPI
# pci_root.c driver but don't support standard ECAM config access.

6
drivers/pci/dwc/pci-dra7xx.c
View file

@ -174,7 +174,7 @@ static int dra7xx_pcie_establish_link(struct dw_pcie *pci)
static void dra7xx_pcie_enable_msi_interrupts(struct dra7xx_pcie *dra7xx)
{
dra7xx_pcie_writel(dra7xx, PCIECTRL_DRA7XX_CONF_IRQSTATUS_MSI,
~LEG_EP_INTERRUPTS & ~MSI);
LEG_EP_INTERRUPTS | MSI);
dra7xx_pcie_writel(dra7xx,
PCIECTRL_DRA7XX_CONF_IRQENABLE_SET_MSI,
@ -184,7 +184,7 @@ static void dra7xx_pcie_enable_msi_interrupts(struct dra7xx_pcie *dra7xx)
static void dra7xx_pcie_enable_wrapper_interrupts(struct dra7xx_pcie *dra7xx)
{
dra7xx_pcie_writel(dra7xx, PCIECTRL_DRA7XX_CONF_IRQSTATUS_MAIN,
~INTERRUPTS);
INTERRUPTS);
dra7xx_pcie_writel(dra7xx, PCIECTRL_DRA7XX_CONF_IRQENABLE_SET_MAIN,
INTERRUPTS);
}
@ -208,7 +208,7 @@ static void dra7xx_pcie_host_init(struct pcie_port *pp)
dra7xx_pcie_enable_interrupts(dra7xx);
}
static struct dw_pcie_host_ops dra7xx_pcie_host_ops = {
static const struct dw_pcie_host_ops dra7xx_pcie_host_ops = {
.host_init = dra7xx_pcie_host_init,
};

2
drivers/pci/dwc/pci-exynos.c
View file

@ -590,7 +590,7 @@ static void exynos_pcie_host_init(struct pcie_port *pp)
exynos_pcie_enable_interrupts(ep);
}
static struct dw_pcie_host_ops exynos_pcie_host_ops = {
static const struct dw_pcie_host_ops exynos_pcie_host_ops = {
.rd_own_conf = exynos_pcie_rd_own_conf,
.wr_own_conf = exynos_pcie_wr_own_conf,
.host_init = exynos_pcie_host_init,

39
drivers/pci/dwc/pci-imx6.c
View file

@ -24,6 +24,7 @@
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/resource.h>
#include <linux/signal.h>
#include <linux/types.h>
@ -59,6 +60,7 @@ struct imx6_pcie {
u32 tx_swing_full;
u32 tx_swing_low;
int link_gen;
struct regulator *vpcie;
};
/* Parameters for the waiting for PCIe PHY PLL to lock on i.MX7 */
@ -284,6 +286,8 @@ static int imx6q_pcie_abort_handler(unsigned long addr,
static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
{
struct device *dev = imx6_pcie->pci->dev;
switch (imx6_pcie->variant) {
case IMX7D:
reset_control_assert(imx6_pcie->pciephy_reset);
@ -310,6 +314,14 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
IMX6Q_GPR1_PCIE_REF_CLK_EN, 0 << 16);
break;
}
if (imx6_pcie->vpcie && regulator_is_enabled(imx6_pcie->vpcie) > 0) {
int ret = regulator_disable(imx6_pcie->vpcie);
if (ret)
dev_err(dev, "failed to disable vpcie regulator: %d\n",
ret);
}
}
static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
@ -376,10 +388,19 @@ static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
struct device *dev = pci->dev;
int ret;
if (imx6_pcie->vpcie && !regulator_is_enabled(imx6_pcie->vpcie)) {
ret = regulator_enable(imx6_pcie->vpcie);
if (ret) {
dev_err(dev, "failed to enable vpcie regulator: %d\n",
ret);
return;
}
}
ret = clk_prepare_enable(imx6_pcie->pcie_phy);
if (ret) {
dev_err(dev, "unable to enable pcie_phy clock\n");
return;
goto err_pcie_phy;
}
ret = clk_prepare_enable(imx6_pcie->pcie_bus);
@ -439,6 +460,13 @@ static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
clk_disable_unprepare(imx6_pcie->pcie_bus);
err_pcie_bus:
clk_disable_unprepare(imx6_pcie->pcie_phy);
err_pcie_phy:
if (imx6_pcie->vpcie && regulator_is_enabled(imx6_pcie->vpcie) > 0) {
ret = regulator_disable(imx6_pcie->vpcie);
if (ret)
dev_err(dev, "failed to disable vpcie regulator: %d\n",
ret);
}
}
static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
@ -629,7 +657,7 @@ static int imx6_pcie_link_up(struct dw_pcie *pci)
PCIE_PHY_DEBUG_R1_XMLH_LINK_UP;
}
static struct dw_pcie_host_ops imx6_pcie_host_ops = {
static const struct dw_pcie_host_ops imx6_pcie_host_ops = {
.host_init = imx6_pcie_host_init,
};
@ -802,6 +830,13 @@ static int imx6_pcie_probe(struct platform_device *pdev)
if (ret)
imx6_pcie->link_gen = 1;
imx6_pcie->vpcie = devm_regulator_get_optional(&pdev->dev, "vpcie");
if (IS_ERR(imx6_pcie->vpcie)) {
if (PTR_ERR(imx6_pcie->vpcie) == -EPROBE_DEFER)
return -EPROBE_DEFER;
imx6_pcie->vpcie = NULL;
}
platform_set_drvdata(pdev, imx6_pcie);
ret = imx6_add_pcie_port(imx6_pcie, pdev);

2
drivers/pci/dwc/pci-keystone.c
View file

@ -291,7 +291,7 @@ static void __init ks_pcie_host_init(struct pcie_port *pp)
"Asynchronous external abort");
}
static struct dw_pcie_host_ops keystone_pcie_host_ops = {
static const struct dw_pcie_host_ops keystone_pcie_host_ops = {
.rd_other_conf = ks_dw_pcie_rd_other_conf,
.wr_other_conf = ks_dw_pcie_wr_other_conf,
.host_init = ks_pcie_host_init,

6
drivers/pci/dwc/pci-layerscape.c
View file

@ -39,7 +39,7 @@ struct ls_pcie_drvdata {
u32 lut_offset;
u32 ltssm_shift;
u32 lut_dbg;
struct dw_pcie_host_ops *ops;
const struct dw_pcie_host_ops *ops;
const struct dw_pcie_ops *dw_pcie_ops;
};
@ -185,12 +185,12 @@ static int ls_pcie_msi_host_init(struct pcie_port *pp,
return 0;
}
static struct dw_pcie_host_ops ls1021_pcie_host_ops = {
static const struct dw_pcie_host_ops ls1021_pcie_host_ops = {
.host_init = ls1021_pcie_host_init,
.msi_host_init = ls_pcie_msi_host_init,
};
static struct dw_pcie_host_ops ls_pcie_host_ops = {
static const struct dw_pcie_host_ops ls_pcie_host_ops = {
.host_init = ls_pcie_host_init,
.msi_host_init = ls_pcie_msi_host_init,
};

2
drivers/pci/dwc/pcie-armada8k.c
View file

@ -160,7 +160,7 @@ static irqreturn_t armada8k_pcie_irq_handler(int irq, void *arg)
return IRQ_HANDLED;
}
static struct dw_pcie_host_ops armada8k_pcie_host_ops = {
static const struct dw_pcie_host_ops armada8k_pcie_host_ops = {
.host_init = armada8k_pcie_host_init,
};

2
drivers/pci/dwc/pcie-artpec6.c
View file

@ -184,7 +184,7 @@ static void artpec6_pcie_host_init(struct pcie_port *pp)
artpec6_pcie_enable_interrupts(artpec6_pcie);
}
static struct dw_pcie_host_ops artpec6_pcie_host_ops = {
static const struct dw_pcie_host_ops artpec6_pcie_host_ops = {
.host_init = artpec6_pcie_host_init,
};

43
drivers/pci/dwc/pcie-designware-host.c
View file

@ -280,9 +280,9 @@ int dw_pcie_host_init(struct pcie_port *pp)
struct device_node *np = dev->of_node;
struct platform_device *pdev = to_platform_device(dev);
struct pci_bus *bus, *child;
struct pci_host_bridge *bridge;
struct resource *cfg_res;
int i, ret;
LIST_HEAD(res);
struct resource_entry *win, *tmp;
cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
@ -295,16 +295,21 @@ int dw_pcie_host_init(struct pcie_port *pp)
dev_err(dev, "missing *config* reg space\n");
}
ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &pp->io_base);
bridge = pci_alloc_host_bridge(0);
if (!bridge)
return -ENOMEM;
ret = of_pci_get_host_bridge_resources(np, 0, 0xff,
&bridge->windows, &pp->io_base);
if (ret)
return ret;
ret = devm_request_pci_bus_resources(dev, &res);
ret = devm_request_pci_bus_resources(dev, &bridge->windows);
if (ret)
goto error;
/* Get the I/O and memory ranges from DT */
resource_list_for_each_entry_safe(win, tmp, &res) {
resource_list_for_each_entry_safe(win, tmp, &bridge->windows) {
switch (resource_type(win->res)) {
case IORESOURCE_IO:
ret = pci_remap_iospace(win->res, pp->io_base);
@ -400,27 +405,27 @@ int dw_pcie_host_init(struct pcie_port *pp)
pp->ops->host_init(pp);
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;
if (IS_ENABLED(CONFIG_PCI_MSI)) {
bus = pci_scan_root_bus_msi(dev, pp->root_bus_nr,
&dw_pcie_ops, pp, &res,
&dw_pcie_msi_chip);
bridge->msi = &dw_pcie_msi_chip;
dw_pcie_msi_chip.dev = dev;
} else
bus = pci_scan_root_bus(dev, pp->root_bus_nr, &dw_pcie_ops,
pp, &res);
if (!bus) {
ret = -ENOMEM;
goto error;
}
ret = pci_scan_root_bus_bridge(bridge);
if (ret)
goto error;
bus = bridge->bus;
if (pp->ops->scan_bus)
pp->ops->scan_bus(pp);
#ifdef CONFIG_ARM
/* support old dtbs that incorrectly describe IRQs */
pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
#endif
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
@ -431,7 +436,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
return 0;
error:
pci_free_resource_list(&res);
pci_free_host_bridge(bridge);
return ret;
}

5
drivers/pci/dwc/pcie-designware-plat.c
View file

@ -46,7 +46,7 @@ static void dw_plat_pcie_host_init(struct pcie_port *pp)
dw_pcie_msi_init(pp);
}
static struct dw_pcie_host_ops dw_plat_pcie_host_ops = {
static const struct dw_pcie_host_ops dw_plat_pcie_host_ops = {
.host_init = dw_plat_pcie_host_init,
};
@ -67,7 +67,8 @@ static int dw_plat_add_pcie_port(struct pcie_port *pp,
ret = devm_request_irq(dev, pp->msi_irq,
dw_plat_pcie_msi_irq_handler,
IRQF_SHARED, "dw-plat-pcie-msi", pp);
IRQF_SHARED | IRQF_NO_THREAD,
"dw-plat-pcie-msi", pp);
if (ret) {
dev_err(dev, "failed to request MSI IRQ\n");
return ret;

2
drivers/pci/dwc/pcie-designware.h
View file

@ -162,7 +162,7 @@ struct pcie_port {
struct resource *mem;
struct resource *busn;
int irq;
struct dw_pcie_host_ops *ops;
const struct dw_pcie_host_ops *ops;
int msi_irq;
struct irq_domain *irq_domain;
unsigned long msi_data;

517
drivers/pci/dwc/pcie-kirin.c Normal file
View file

@ -0,0 +1,517 @@
/*
* PCIe host controller driver for Kirin Phone SoCs
*
* Copyright (C) 2017 Hilisicon Electronics Co., Ltd.
* http://www.huawei.com
*
* Author: Xiaowei Song <songxiaowei@huawei.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <asm/compiler.h>
#include <linux/compiler.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/mfd/syscon.h>
#include <linux/of_address.h>
#include <linux/of_gpio.h>
#include <linux/of_pci.h>
#include <linux/pci.h>
#include <linux/pci_regs.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/resource.h>
#include <linux/types.h>
#include "pcie-designware.h"
#define to_kirin_pcie(x) dev_get_drvdata((x)->dev)
#define REF_CLK_FREQ 100000000
/* PCIe ELBI registers */
#define SOC_PCIECTRL_CTRL0_ADDR 0x000
#define SOC_PCIECTRL_CTRL1_ADDR 0x004
#define SOC_PCIEPHY_CTRL2_ADDR 0x008
#define SOC_PCIEPHY_CTRL3_ADDR 0x00c
#define PCIE_ELBI_SLV_DBI_ENABLE (0x1 << 21)
/* info located in APB */
#define PCIE_APP_LTSSM_ENABLE 0x01c
#define PCIE_APB_PHY_CTRL0 0x0
#define PCIE_APB_PHY_CTRL1 0x4
#define PCIE_APB_PHY_STATUS0 0x400
#define PCIE_LINKUP_ENABLE (0x8020)
#define PCIE_LTSSM_ENABLE_BIT (0x1 << 11)
#define PIPE_CLK_STABLE (0x1 << 19)
#define PHY_REF_PAD_BIT (0x1 << 8)
#define PHY_PWR_DOWN_BIT (0x1 << 22)
#define PHY_RST_ACK_BIT (0x1 << 16)
/* info located in sysctrl */
#define SCTRL_PCIE_CMOS_OFFSET 0x60
#define SCTRL_PCIE_CMOS_BIT 0x10
#define SCTRL_PCIE_ISO_OFFSET 0x44
#define SCTRL_PCIE_ISO_BIT 0x30
#define SCTRL_PCIE_HPCLK_OFFSET 0x190
#define SCTRL_PCIE_HPCLK_BIT 0x184000
#define SCTRL_PCIE_OE_OFFSET 0x14a
#define PCIE_DEBOUNCE_PARAM 0xF0F400
#define PCIE_OE_BYPASS (0x3 << 28)
/* peri_crg ctrl */
#define CRGCTRL_PCIE_ASSERT_OFFSET 0x88
#define CRGCTRL_PCIE_ASSERT_BIT 0x8c000000
/* Time for delay */
#define REF_2_PERST_MIN 20000
#define REF_2_PERST_MAX 25000
#define PERST_2_ACCESS_MIN 10000
#define PERST_2_ACCESS_MAX 12000
#define LINK_WAIT_MIN 900
#define LINK_WAIT_MAX 1000
#define PIPE_CLK_WAIT_MIN 550
#define PIPE_CLK_WAIT_MAX 600
#define TIME_CMOS_MIN 100
#define TIME_CMOS_MAX 105
#define TIME_PHY_PD_MIN 10
#define TIME_PHY_PD_MAX 11
struct kirin_pcie {
struct dw_pcie *pci;
void __iomem *apb_base;
void __iomem *phy_base;
struct regmap *crgctrl;
struct regmap *sysctrl;
struct clk *apb_sys_clk;
struct clk *apb_phy_clk;
struct clk *phy_ref_clk;
struct clk *pcie_aclk;
struct clk *pcie_aux_clk;
int gpio_id_reset;
};
/* Registers in PCIeCTRL */
static inline void kirin_apb_ctrl_writel(struct kirin_pcie *kirin_pcie,
u32 val, u32 reg)
{
writel(val, kirin_pcie->apb_base + reg);
}
static inline u32 kirin_apb_ctrl_readl(struct kirin_pcie *kirin_pcie, u32 reg)
{
return readl(kirin_pcie->apb_base + reg);
}
/* Registers in PCIePHY */
static inline void kirin_apb_phy_writel(struct kirin_pcie *kirin_pcie,
u32 val, u32 reg)
{
writel(val, kirin_pcie->phy_base + reg);
}
static inline u32 kirin_apb_phy_readl(struct kirin_pcie *kirin_pcie, u32 reg)
{
return readl(kirin_pcie->phy_base + reg);
}
static long kirin_pcie_get_clk(struct kirin_pcie *kirin_pcie,
struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
kirin_pcie->phy_ref_clk = devm_clk_get(dev, "pcie_phy_ref");
if (IS_ERR(kirin_pcie->phy_ref_clk))
return PTR_ERR(kirin_pcie->phy_ref_clk);
kirin_pcie->pcie_aux_clk = devm_clk_get(dev, "pcie_aux");
if (IS_ERR(kirin_pcie->pcie_aux_clk))
return PTR_ERR(kirin_pcie->pcie_aux_clk);
kirin_pcie->apb_phy_clk = devm_clk_get(dev, "pcie_apb_phy");
if (IS_ERR(kirin_pcie->apb_phy_clk))
return PTR_ERR(kirin_pcie->apb_phy_clk);
kirin_pcie->apb_sys_clk = devm_clk_get(dev, "pcie_apb_sys");
if (IS_ERR(kirin_pcie->apb_sys_clk))
return PTR_ERR(kirin_pcie->apb_sys_clk);
kirin_pcie->pcie_aclk = devm_clk_get(dev, "pcie_aclk");
if (IS_ERR(kirin_pcie->pcie_aclk))
return PTR_ERR(kirin_pcie->pcie_aclk);
return 0;
}
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);
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);
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);
if (IS_ERR(kirin_pcie->pci->dbi_base))
return PTR_ERR(kirin_pcie->pci->dbi_base);
kirin_pcie->crgctrl =
syscon_regmap_lookup_by_compatible("hisilicon,hi3660-crgctrl");
if (IS_ERR(kirin_pcie->crgctrl))
return PTR_ERR(kirin_pcie->crgctrl);
kirin_pcie->sysctrl =
syscon_regmap_lookup_by_compatible("hisilicon,hi3660-sctrl");
if (IS_ERR(kirin_pcie->sysctrl))
return PTR_ERR(kirin_pcie->sysctrl);
return 0;
}
static int kirin_pcie_phy_init(struct kirin_pcie *kirin_pcie)
{
struct device *dev = kirin_pcie->pci->dev;
u32 reg_val;
reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_CTRL1);
reg_val &= ~PHY_REF_PAD_BIT;
kirin_apb_phy_writel(kirin_pcie, reg_val, PCIE_APB_PHY_CTRL1);
reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_CTRL0);
reg_val &= ~PHY_PWR_DOWN_BIT;
kirin_apb_phy_writel(kirin_pcie, reg_val, PCIE_APB_PHY_CTRL0);
usleep_range(TIME_PHY_PD_MIN, TIME_PHY_PD_MAX);
reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_CTRL1);
reg_val &= ~PHY_RST_ACK_BIT;
kirin_apb_phy_writel(kirin_pcie, reg_val, PCIE_APB_PHY_CTRL1);
usleep_range(PIPE_CLK_WAIT_MIN, PIPE_CLK_WAIT_MAX);
reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_STATUS0);
if (reg_val & PIPE_CLK_STABLE) {
dev_err(dev, "PIPE clk is not stable\n");
return -EINVAL;
}
return 0;
}
static void kirin_pcie_oe_enable(struct kirin_pcie *kirin_pcie)
{
u32 val;
regmap_read(kirin_pcie->sysctrl, SCTRL_PCIE_OE_OFFSET, &val);
val |= PCIE_DEBOUNCE_PARAM;
val &= ~PCIE_OE_BYPASS;
regmap_write(kirin_pcie->sysctrl, SCTRL_PCIE_OE_OFFSET, val);
}
static int kirin_pcie_clk_ctrl(struct kirin_pcie *kirin_pcie, bool enable)
{
int ret = 0;
if (!enable)
goto close_clk;
ret = clk_set_rate(kirin_pcie->phy_ref_clk, REF_CLK_FREQ);
if (ret)
return ret;
ret = clk_prepare_enable(kirin_pcie->phy_ref_clk);
if (ret)
return ret;
ret = clk_prepare_enable(kirin_pcie->apb_sys_clk);
if (ret)
goto apb_sys_fail;
ret = clk_prepare_enable(kirin_pcie->apb_phy_clk);
if (ret)
goto apb_phy_fail;
ret = clk_prepare_enable(kirin_pcie->pcie_aclk);
if (ret)
goto aclk_fail;
ret = clk_prepare_enable(kirin_pcie->pcie_aux_clk);
if (ret)
goto aux_clk_fail;
return 0;
close_clk:
clk_disable_unprepare(kirin_pcie->pcie_aux_clk);
aux_clk_fail:
clk_disable_unprepare(kirin_pcie->pcie_aclk);
aclk_fail:
clk_disable_unprepare(kirin_pcie->apb_phy_clk);
apb_phy_fail:
clk_disable_unprepare(kirin_pcie->apb_sys_clk);
apb_sys_fail:
clk_disable_unprepare(kirin_pcie->phy_ref_clk);
return ret;
}
static int kirin_pcie_power_on(struct kirin_pcie *kirin_pcie)
{
int ret;
/* Power supply for Host */
regmap_write(kirin_pcie->sysctrl,
SCTRL_PCIE_CMOS_OFFSET, SCTRL_PCIE_CMOS_BIT);
usleep_range(TIME_CMOS_MIN, TIME_CMOS_MAX);
kirin_pcie_oe_enable(kirin_pcie);
ret = kirin_pcie_clk_ctrl(kirin_pcie, true);
if (ret)
return ret;
/* ISO disable, PCIeCtrl, PHY assert and clk gate clear */
regmap_write(kirin_pcie->sysctrl,
SCTRL_PCIE_ISO_OFFSET, SCTRL_PCIE_ISO_BIT);
regmap_write(kirin_pcie->crgctrl,
CRGCTRL_PCIE_ASSERT_OFFSET, CRGCTRL_PCIE_ASSERT_BIT);
regmap_write(kirin_pcie->sysctrl,
SCTRL_PCIE_HPCLK_OFFSET, SCTRL_PCIE_HPCLK_BIT);
ret = kirin_pcie_phy_init(kirin_pcie);
if (ret)
goto close_clk;
/* perst assert Endpoint */
if (!gpio_request(kirin_pcie->gpio_id_reset, "pcie_perst")) {
usleep_range(REF_2_PERST_MIN, REF_2_PERST_MAX);
ret = gpio_direction_output(kirin_pcie->gpio_id_reset, 1);
if (ret)
goto close_clk;
usleep_range(PERST_2_ACCESS_MIN, PERST_2_ACCESS_MAX);
return 0;
}
close_clk:
kirin_pcie_clk_ctrl(kirin_pcie, false);
return ret;
}
static void kirin_pcie_sideband_dbi_w_mode(struct kirin_pcie *kirin_pcie,
bool on)
{
u32 val;
val = kirin_apb_ctrl_readl(kirin_pcie, SOC_PCIECTRL_CTRL0_ADDR);
if (on)
val = val | PCIE_ELBI_SLV_DBI_ENABLE;
else
val = val & ~PCIE_ELBI_SLV_DBI_ENABLE;
kirin_apb_ctrl_writel(kirin_pcie, val, SOC_PCIECTRL_CTRL0_ADDR);
}
static void kirin_pcie_sideband_dbi_r_mode(struct kirin_pcie *kirin_pcie,
bool on)
{
u32 val;
val = kirin_apb_ctrl_readl(kirin_pcie, SOC_PCIECTRL_CTRL1_ADDR);
if (on)
val = val | PCIE_ELBI_SLV_DBI_ENABLE;
else
val = val & ~PCIE_ELBI_SLV_DBI_ENABLE;
kirin_apb_ctrl_writel(kirin_pcie, val, SOC_PCIECTRL_CTRL1_ADDR);
}
static int kirin_pcie_rd_own_conf(struct pcie_port *pp,
int where, int size, u32 *val)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
int ret;
kirin_pcie_sideband_dbi_r_mode(kirin_pcie, true);
ret = dw_pcie_read(pci->dbi_base + where, size, val);
kirin_pcie_sideband_dbi_r_mode(kirin_pcie, false);
return ret;
}
static int kirin_pcie_wr_own_conf(struct pcie_port *pp,
int where, int size, u32 val)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
int ret;
kirin_pcie_sideband_dbi_w_mode(kirin_pcie, true);
ret = dw_pcie_write(pci->dbi_base + where, size, val);
kirin_pcie_sideband_dbi_w_mode(kirin_pcie, false);
return ret;
}
static u32 kirin_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base,
u32 reg, size_t size)
{
struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
u32 ret;
kirin_pcie_sideband_dbi_r_mode(kirin_pcie, true);
dw_pcie_read(base + reg, size, &ret);
kirin_pcie_sideband_dbi_r_mode(kirin_pcie, false);
return ret;
}
static void kirin_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base,
u32 reg, size_t size, u32 val)
{
struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
kirin_pcie_sideband_dbi_w_mode(kirin_pcie, true);
dw_pcie_write(base + reg, size, val);
kirin_pcie_sideband_dbi_w_mode(kirin_pcie, false);
}
static int kirin_pcie_link_up(struct dw_pcie *pci)
{
struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
u32 val = kirin_apb_ctrl_readl(kirin_pcie, PCIE_APB_PHY_STATUS0);
if ((val & PCIE_LINKUP_ENABLE) == PCIE_LINKUP_ENABLE)
return 1;
return 0;
}
static int kirin_pcie_establish_link(struct pcie_port *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
struct device *dev = kirin_pcie->pci->dev;
int count = 0;
if (kirin_pcie_link_up(pci))
return 0;
dw_pcie_setup_rc(pp);
/* assert LTSSM enable */
kirin_apb_ctrl_writel(kirin_pcie, PCIE_LTSSM_ENABLE_BIT,
PCIE_APP_LTSSM_ENABLE);
/* check if the link is up or not */
while (!kirin_pcie_link_up(pci)) {
usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX);
count++;
if (count == 1000) {
dev_err(dev, "Link Fail\n");
return -EINVAL;
}
}
return 0;
}
static void kirin_pcie_host_init(struct pcie_port *pp)
{
kirin_pcie_establish_link(pp);
}
static struct dw_pcie_ops kirin_dw_pcie_ops = {
.read_dbi = kirin_pcie_read_dbi,
.write_dbi = kirin_pcie_write_dbi,
.link_up = kirin_pcie_link_up,
};
static struct dw_pcie_host_ops kirin_pcie_host_ops = {
.rd_own_conf = kirin_pcie_rd_own_conf,
.wr_own_conf = kirin_pcie_wr_own_conf,
.host_init = kirin_pcie_host_init,
};
static int __init kirin_add_pcie_port(struct dw_pcie *pci,
struct platform_device *pdev)
{
pci->pp.ops = &kirin_pcie_host_ops;
return dw_pcie_host_init(&pci->pp);
}
static int kirin_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct kirin_pcie *kirin_pcie;
struct dw_pcie *pci;
int ret;
if (!dev->of_node) {
dev_err(dev, "NULL node\n");
return -EINVAL;
}
kirin_pcie = devm_kzalloc(dev, sizeof(struct kirin_pcie), GFP_KERNEL);
if (!kirin_pcie)
return -ENOMEM;
pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
if (!pci)
return -ENOMEM;
pci->dev = dev;
pci->ops = &kirin_dw_pcie_ops;
kirin_pcie->pci = pci;
ret = kirin_pcie_get_clk(kirin_pcie, pdev);
if (ret)
return ret;
ret = kirin_pcie_get_resource(kirin_pcie, pdev);
if (ret)
return ret;
kirin_pcie->gpio_id_reset = of_get_named_gpio(dev->of_node,
"reset-gpio", 0);
if (kirin_pcie->gpio_id_reset < 0)
return -ENODEV;
ret = kirin_pcie_power_on(kirin_pcie);
if (ret)
return ret;
platform_set_drvdata(pdev, kirin_pcie);
return kirin_add_pcie_port(pci, pdev);
}
static const struct of_device_id kirin_pcie_match[] = {
{ .compatible = "hisilicon,kirin960-pcie" },
{},
};
struct platform_driver kirin_pcie_driver = {
.probe = kirin_pcie_probe,
.driver = {
.name = "kirin-pcie",
.of_match_table = kirin_pcie_match,
.suppress_bind_attrs = true,
},
};
builtin_platform_driver(kirin_pcie_driver);

446
drivers/pci/dwc/pcie-qcom.c
View file

@ -51,6 +51,12 @@
#define PCIE20_ELBI_SYS_CTRL 0x04
#define PCIE20_ELBI_SYS_CTRL_LT_ENABLE BIT(0)
#define PCIE20_AXI_MSTR_RESP_COMP_CTRL0 0x818
#define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K 0x4
#define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_4K 0x5
#define PCIE20_AXI_MSTR_RESP_COMP_CTRL1 0x81c
#define CFG_BRIDGE_SB_INIT BIT(0)
#define PCIE20_CAP 0x70
#define PERST_DELAY_US 1000
@ -86,10 +92,29 @@ struct qcom_pcie_resources_v2 {
struct clk *pipe_clk;
};
struct qcom_pcie_resources_v3 {
struct clk *aux_clk;
struct clk *master_clk;
struct clk *slave_clk;
struct reset_control *axi_m_reset;
struct reset_control *axi_s_reset;
struct reset_control *pipe_reset;
struct reset_control *axi_m_vmid_reset;
struct reset_control *axi_s_xpu_reset;
struct reset_control *parf_reset;
struct reset_control *phy_reset;
struct reset_control *axi_m_sticky_reset;
struct reset_control *pipe_sticky_reset;
struct reset_control *pwr_reset;
struct reset_control *ahb_reset;
struct reset_control *phy_ahb_reset;
};
union qcom_pcie_resources {
struct qcom_pcie_resources_v0 v0;
struct qcom_pcie_resources_v1 v1;
struct qcom_pcie_resources_v2 v2;
struct qcom_pcie_resources_v3 v3;
};
struct qcom_pcie;
@ -133,26 +158,6 @@ static irqreturn_t qcom_pcie_msi_irq_handler(int irq, void *arg)
return dw_handle_msi_irq(pp);
}
static void qcom_pcie_v0_v1_ltssm_enable(struct qcom_pcie *pcie)
{
u32 val;
/* enable link training */
val = readl(pcie->elbi + PCIE20_ELBI_SYS_CTRL);
val |= PCIE20_ELBI_SYS_CTRL_LT_ENABLE;
writel(val, pcie->elbi + PCIE20_ELBI_SYS_CTRL);
}
static void qcom_pcie_v2_ltssm_enable(struct qcom_pcie *pcie)
{
u32 val;
/* enable link training */
val = readl(pcie->parf + PCIE20_PARF_LTSSM);
val |= BIT(8);
writel(val, pcie->parf + PCIE20_PARF_LTSSM);
}
static int qcom_pcie_establish_link(struct qcom_pcie *pcie)
{
struct dw_pcie *pci = pcie->pci;
@ -167,6 +172,16 @@ static int qcom_pcie_establish_link(struct qcom_pcie *pcie)
return dw_pcie_wait_for_link(pci);
}
static void qcom_pcie_v0_v1_ltssm_enable(struct qcom_pcie *pcie)
{
u32 val;
/* enable link training */
val = readl(pcie->elbi + PCIE20_ELBI_SYS_CTRL);
val |= PCIE20_ELBI_SYS_CTRL_LT_ENABLE;
writel(val, pcie->elbi + PCIE20_ELBI_SYS_CTRL);
}
static int qcom_pcie_get_resources_v0(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v0 *res = &pcie->res.v0;
@ -217,36 +232,6 @@ static int qcom_pcie_get_resources_v0(struct qcom_pcie *pcie)
return PTR_ERR_OR_ZERO(res->phy_reset);
}
static int qcom_pcie_get_resources_v1(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v1 *res = &pcie->res.v1;
struct dw_pcie *pci = pcie->pci;
struct device *dev = pci->dev;
res->vdda = devm_regulator_get(dev, "vdda");
if (IS_ERR(res->vdda))
return PTR_ERR(res->vdda);
res->iface = devm_clk_get(dev, "iface");
if (IS_ERR(res->iface))
return PTR_ERR(res->iface);
res->aux = devm_clk_get(dev, "aux");
if (IS_ERR(res->aux))
return PTR_ERR(res->aux);
res->master_bus = devm_clk_get(dev, "master_bus");
if (IS_ERR(res->master_bus))
return PTR_ERR(res->master_bus);
res->slave_bus = devm_clk_get(dev, "slave_bus");
if (IS_ERR(res->slave_bus))
return PTR_ERR(res->slave_bus);
res->core = devm_reset_control_get(dev, "core");
return PTR_ERR_OR_ZERO(res->core);
}
static void qcom_pcie_deinit_v0(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v0 *res = &pcie->res.v0;
@ -357,6 +342,13 @@ static int qcom_pcie_init_v0(struct qcom_pcie *pcie)
/* wait for clock acquisition */
usleep_range(1000, 1500);
/* Set the Max TLP size to 2K, instead of using default of 4K */
writel(CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K,
pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL0);
writel(CFG_BRIDGE_SB_INIT,
pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL1);
return 0;
err_deassert_ahb:
@ -375,6 +367,36 @@ static int qcom_pcie_init_v0(struct qcom_pcie *pcie)
return ret;
}
static int qcom_pcie_get_resources_v1(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v1 *res = &pcie->res.v1;
struct dw_pcie *pci = pcie->pci;
struct device *dev = pci->dev;
res->vdda = devm_regulator_get(dev, "vdda");
if (IS_ERR(res->vdda))
return PTR_ERR(res->vdda);
res->iface = devm_clk_get(dev, "iface");
if (IS_ERR(res->iface))
return PTR_ERR(res->iface);
res->aux = devm_clk_get(dev, "aux");
if (IS_ERR(res->aux))
return PTR_ERR(res->aux);
res->master_bus = devm_clk_get(dev, "master_bus");
if (IS_ERR(res->master_bus))
return PTR_ERR(res->master_bus);
res->slave_bus = devm_clk_get(dev, "slave_bus");
if (IS_ERR(res->slave_bus))
return PTR_ERR(res->slave_bus);
res->core = devm_reset_control_get(dev, "core");
return PTR_ERR_OR_ZERO(res->core);
}
static void qcom_pcie_deinit_v1(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v1 *res = &pcie->res.v1;
@ -455,6 +477,16 @@ static int qcom_pcie_init_v1(struct qcom_pcie *pcie)
return ret;
}
static void qcom_pcie_v2_ltssm_enable(struct qcom_pcie *pcie)
{
u32 val;
/* enable link training */
val = readl(pcie->parf + PCIE20_PARF_LTSSM);
val |= BIT(8);
writel(val, pcie->parf + PCIE20_PARF_LTSSM);
}
static int qcom_pcie_get_resources_v2(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v2 *res = &pcie->res.v2;
@ -481,6 +513,17 @@ static int qcom_pcie_get_resources_v2(struct qcom_pcie *pcie)
return PTR_ERR_OR_ZERO(res->pipe_clk);
}
static void qcom_pcie_deinit_v2(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v2 *res = &pcie->res.v2;
clk_disable_unprepare(res->pipe_clk);
clk_disable_unprepare(res->slave_clk);
clk_disable_unprepare(res->master_clk);
clk_disable_unprepare(res->cfg_clk);
clk_disable_unprepare(res->aux_clk);
}
static int qcom_pcie_init_v2(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v2 *res = &pcie->res.v2;
@ -562,6 +605,285 @@ static int qcom_pcie_post_init_v2(struct qcom_pcie *pcie)
return 0;
}
static int qcom_pcie_get_resources_v3(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v3 *res = &pcie->res.v3;
struct dw_pcie *pci = pcie->pci;
struct device *dev = pci->dev;
res->aux_clk = devm_clk_get(dev, "aux");
if (IS_ERR(res->aux_clk))
return PTR_ERR(res->aux_clk);
res->master_clk = devm_clk_get(dev, "master_bus");
if (IS_ERR(res->master_clk))
return PTR_ERR(res->master_clk);
res->slave_clk = devm_clk_get(dev, "slave_bus");
if (IS_ERR(res->slave_clk))
return PTR_ERR(res->slave_clk);
res->axi_m_reset = devm_reset_control_get(dev, "axi_m");
if (IS_ERR(res->axi_m_reset))
return PTR_ERR(res->axi_m_reset);
res->axi_s_reset = devm_reset_control_get(dev, "axi_s");
if (IS_ERR(res->axi_s_reset))
return PTR_ERR(res->axi_s_reset);
res->pipe_reset = devm_reset_control_get(dev, "pipe");
if (IS_ERR(res->pipe_reset))
return PTR_ERR(res->pipe_reset);
res->axi_m_vmid_reset = devm_reset_control_get(dev, "axi_m_vmid");
if (IS_ERR(res->axi_m_vmid_reset))
return PTR_ERR(res->axi_m_vmid_reset);
res->axi_s_xpu_reset = devm_reset_control_get(dev, "axi_s_xpu");
if (IS_ERR(res->axi_s_xpu_reset))
return PTR_ERR(res->axi_s_xpu_reset);
res->parf_reset = devm_reset_control_get(dev, "parf");
if (IS_ERR(res->parf_reset))
return PTR_ERR(res->parf_reset);
res->phy_reset = devm_reset_control_get(dev, "phy");
if (IS_ERR(res->phy_reset))
return PTR_ERR(res->phy_reset);
res->axi_m_sticky_reset = devm_reset_control_get(dev, "axi_m_sticky");
if (IS_ERR(res->axi_m_sticky_reset))
return PTR_ERR(res->axi_m_sticky_reset);
res->pipe_sticky_reset = devm_reset_control_get(dev, "pipe_sticky");
if (IS_ERR(res->pipe_sticky_reset))
return PTR_ERR(res->pipe_sticky_reset);
res->pwr_reset = devm_reset_control_get(dev, "pwr");
if (IS_ERR(res->pwr_reset))
return PTR_ERR(res->pwr_reset);
res->ahb_reset = devm_reset_control_get(dev, "ahb");
if (IS_ERR(res->ahb_reset))
return PTR_ERR(res->ahb_reset);
res->phy_ahb_reset = devm_reset_control_get(dev, "phy_ahb");
if (IS_ERR(res->phy_ahb_reset))
return PTR_ERR(res->phy_ahb_reset);
return 0;
}
static void qcom_pcie_deinit_v3(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v3 *res = &pcie->res.v3;
reset_control_assert(res->axi_m_reset);
reset_control_assert(res->axi_s_reset);
reset_control_assert(res->pipe_reset);
reset_control_assert(res->pipe_sticky_reset);
reset_control_assert(res->phy_reset);
reset_control_assert(res->phy_ahb_reset);
reset_control_assert(res->axi_m_sticky_reset);
reset_control_assert(res->pwr_reset);
reset_control_assert(res->ahb_reset);
clk_disable_unprepare(res->aux_clk);
clk_disable_unprepare(res->master_clk);
clk_disable_unprepare(res->slave_clk);
}
static int qcom_pcie_init_v3(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v3 *res = &pcie->res.v3;
struct dw_pcie *pci = pcie->pci;
struct device *dev = pci->dev;
u32 val;
int ret;
ret = reset_control_assert(res->axi_m_reset);
if (ret) {
dev_err(dev, "cannot assert axi master reset\n");
return ret;
}
ret = reset_control_assert(res->axi_s_reset);
if (ret) {
dev_err(dev, "cannot assert axi slave reset\n");
return ret;
}
usleep_range(10000, 12000);
ret = reset_control_assert(res->pipe_reset);
if (ret) {
dev_err(dev, "cannot assert pipe reset\n");
return ret;
}
ret = reset_control_assert(res->pipe_sticky_reset);
if (ret) {
dev_err(dev, "cannot assert pipe sticky reset\n");
return ret;
}
ret = reset_control_assert(res->phy_reset);
if (ret) {
dev_err(dev, "cannot assert phy reset\n");
return ret;
}
ret = reset_control_assert(res->phy_ahb_reset);
if (ret) {
dev_err(dev, "cannot assert phy ahb reset\n");
return ret;
}
usleep_range(10000, 12000);
ret = reset_control_assert(res->axi_m_sticky_reset);
if (ret) {
dev_err(dev, "cannot assert axi master sticky reset\n");
return ret;
}
ret = reset_control_assert(res->pwr_reset);
if (ret) {
dev_err(dev, "cannot assert power reset\n");
return ret;
}
ret = reset_control_assert(res->ahb_reset);
if (ret) {
dev_err(dev, "cannot assert ahb reset\n");
return ret;
}
usleep_range(10000, 12000);
ret = reset_control_deassert(res->phy_ahb_reset);
if (ret) {
dev_err(dev, "cannot deassert phy ahb reset\n");
return ret;
}
ret = reset_control_deassert(res->phy_reset);
if (ret) {
dev_err(dev, "cannot deassert phy reset\n");
goto err_rst_phy;
}
ret = reset_control_deassert(res->pipe_reset);
if (ret) {
dev_err(dev, "cannot deassert pipe reset\n");
goto err_rst_pipe;
}
ret = reset_control_deassert(res->pipe_sticky_reset);
if (ret) {
dev_err(dev, "cannot deassert pipe sticky reset\n");
goto err_rst_pipe_sticky;
}
usleep_range(10000, 12000);
ret = reset_control_deassert(res->axi_m_reset);
if (ret) {
dev_err(dev, "cannot deassert axi master reset\n");
goto err_rst_axi_m;
}
ret = reset_control_deassert(res->axi_m_sticky_reset);
if (ret) {
dev_err(dev, "cannot deassert axi master sticky reset\n");
goto err_rst_axi_m_sticky;
}
ret = reset_control_deassert(res->axi_s_reset);
if (ret) {
dev_err(dev, "cannot deassert axi slave reset\n");
goto err_rst_axi_s;
}
ret = reset_control_deassert(res->pwr_reset);
if (ret) {
dev_err(dev, "cannot deassert power reset\n");
goto err_rst_pwr;
}
ret = reset_control_deassert(res->ahb_reset);
if (ret) {
dev_err(dev, "cannot deassert ahb reset\n");
goto err_rst_ahb;
}
usleep_range(10000, 12000);
ret = clk_prepare_enable(res->aux_clk);
if (ret) {
dev_err(dev, "cannot prepare/enable iface clock\n");
goto err_clk_aux;
}
ret = clk_prepare_enable(res->master_clk);
if (ret) {
dev_err(dev, "cannot prepare/enable core clock\n");
goto err_clk_axi_m;
}
ret = clk_prepare_enable(res->slave_clk);
if (ret) {
dev_err(dev, "cannot prepare/enable phy clock\n");
goto err_clk_axi_s;
}
/* enable PCIe clocks and resets */
val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
val &= !BIT(0);
writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
/* change DBI base address */
writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
/* MAC PHY_POWERDOWN MUX DISABLE */
val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
val &= ~BIT(29);
writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
val |= BIT(4);
writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
val |= BIT(31);
writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
return 0;
err_clk_axi_s:
clk_disable_unprepare(res->master_clk);
err_clk_axi_m:
clk_disable_unprepare(res->aux_clk);
err_clk_aux:
reset_control_assert(res->ahb_reset);
err_rst_ahb:
reset_control_assert(res->pwr_reset);
err_rst_pwr:
reset_control_assert(res->axi_s_reset);
err_rst_axi_s:
reset_control_assert(res->axi_m_sticky_reset);
err_rst_axi_m_sticky:
reset_control_assert(res->axi_m_reset);
err_rst_axi_m:
reset_control_assert(res->pipe_sticky_reset);
err_rst_pipe_sticky:
reset_control_assert(res->pipe_reset);
err_rst_pipe:
reset_control_assert(res->phy_reset);
err_rst_phy:
reset_control_assert(res->phy_ahb_reset);
return ret;
}
static int qcom_pcie_link_up(struct dw_pcie *pci)
{
u16 val = readw(pci->dbi_base + PCIE20_CAP + PCI_EXP_LNKSTA);
@ -569,17 +891,6 @@ static int qcom_pcie_link_up(struct dw_pcie *pci)
return !!(val & PCI_EXP_LNKSTA_DLLLA);
}
static void qcom_pcie_deinit_v2(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_v2 *res = &pcie->res.v2;
clk_disable_unprepare(res->pipe_clk);
clk_disable_unprepare(res->slave_clk);
clk_disable_unprepare(res->master_clk);
clk_disable_unprepare(res->cfg_clk);
clk_disable_unprepare(res->aux_clk);
}
static void qcom_pcie_host_init(struct pcie_port *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
@ -634,7 +945,7 @@ static int qcom_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
return dw_pcie_read(pci->dbi_base + where, size, val);
}
static struct dw_pcie_host_ops qcom_pcie_dw_ops = {
static const struct dw_pcie_host_ops qcom_pcie_dw_ops = {
.host_init = qcom_pcie_host_init,
.rd_own_conf = qcom_pcie_rd_own_conf,
};
@ -665,6 +976,13 @@ static const struct dw_pcie_ops dw_pcie_ops = {
.link_up = qcom_pcie_link_up,
};
static const struct qcom_pcie_ops ops_v3 = {
.get_resources = qcom_pcie_get_resources_v3,
.init = qcom_pcie_init_v3,
.deinit = qcom_pcie_deinit_v3,
.ltssm_enable = qcom_pcie_v2_ltssm_enable,
};
static int qcom_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@ -727,7 +1045,8 @@ static int qcom_pcie_probe(struct platform_device *pdev)
ret = devm_request_irq(dev, pp->msi_irq,
qcom_pcie_msi_irq_handler,
IRQF_SHARED, "qcom-pcie-msi", pp);
IRQF_SHARED | IRQF_NO_THREAD,
"qcom-pcie-msi", pp);
if (ret) {
dev_err(dev, "cannot request msi irq\n");
return ret;
@ -754,6 +1073,7 @@ static const struct of_device_id qcom_pcie_match[] = {
{ .compatible = "qcom,pcie-apq8064", .data = &ops_v0 },
{ .compatible = "qcom,pcie-apq8084", .data = &ops_v1 },
{ .compatible = "qcom,pcie-msm8996", .data = &ops_v2 },
{ .compatible = "qcom,pcie-ipq4019", .data = &ops_v3 },
{ }
};

2
drivers/pci/dwc/pcie-spear13xx.c
View file

@ -186,7 +186,7 @@ static void spear13xx_pcie_host_init(struct pcie_port *pp)
spear13xx_pcie_enable_interrupts(spear13xx_pcie);
}
static struct dw_pcie_host_ops spear13xx_pcie_host_ops = {
static const struct dw_pcie_host_ops spear13xx_pcie_host_ops = {
.host_init = spear13xx_pcie_host_init,
};

25
drivers/pci/host/Kconfig
View file

@ -180,6 +180,31 @@ config PCIE_ROCKCHIP
There is 1 internal PCIe port available to support GEN2 with
4 slots.
config PCIE_MEDIATEK
bool "MediaTek PCIe controller"
depends on ARM && (ARCH_MEDIATEK || COMPILE_TEST)
depends on OF
depends on PCI
select PCIEPORTBUS
help
Say Y here if you want to enable PCIe controller support on
MT7623 series SoCs. There is one single root complex with 3 root
ports available. Each port supports Gen2 lane x1.
config PCIE_TANGO_SMP8759
bool "Tango SMP8759 PCIe controller (DANGEROUS)"
depends on ARCH_TANGO && PCI_MSI && OF
depends on BROKEN
select PCI_HOST_COMMON
help
Say Y here to enable PCIe controller support for Sigma Designs
Tango SMP8759-based systems.
Note: The SMP8759 controller multiplexes PCI config and MMIO
accesses, and Linux doesn't provide a way to serialize them.
This can lead to data corruption if drivers perform concurrent
config and MMIO accesses.
config VMD
depends on PCI_MSI && X86_64 && SRCU
tristate "Intel Volume Management Device Driver"

2
drivers/pci/host/Makefile
View file

@ -18,6 +18,8 @@ obj-$(CONFIG_PCIE_IPROC_BCMA) += pcie-iproc-bcma.o
obj-$(CONFIG_PCIE_ALTERA) += pcie-altera.o
obj-$(CONFIG_PCIE_ALTERA_MSI) += pcie-altera-msi.o
obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o
obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o
obj-$(CONFIG_VMD) += vmd.o
# The following drivers are for devices that use the generic ACPI

21
drivers/pci/host/pci-aardvark.c
View file

@ -886,12 +886,14 @@ static int advk_pcie_probe(struct platform_device *pdev)
struct advk_pcie *pcie;
struct resource *res;
struct pci_bus *bus, *child;
struct pci_host_bridge *bridge;
int ret, irq;
pcie = devm_kzalloc(dev, sizeof(struct advk_pcie), GFP_KERNEL);
if (!pcie)
bridge = devm_pci_alloc_host_bridge(dev, sizeof(struct advk_pcie));
if (!bridge)
return -ENOMEM;
pcie = pci_host_bridge_priv(bridge);
pcie->pdev = pdev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@ -929,14 +931,21 @@ static int advk_pcie_probe(struct platform_device *pdev)
return ret;
}
bus = pci_scan_root_bus(dev, 0, &advk_pcie_ops,
pcie, &pcie->resources);
if (!bus) {
list_splice_init(&pcie->resources, &bridge->windows);
bridge->dev.parent = dev;
bridge->sysdata = pcie;
bridge->busnr = 0;
bridge->ops = &advk_pcie_ops;
ret = pci_scan_root_bus_bridge(bridge);
if (ret < 0) {
advk_pcie_remove_msi_irq_domain(pcie);
advk_pcie_remove_irq_domain(pcie);
return -ENOMEM;
return ret;
}
bus = bridge->bus;
pci_bus_assign_resources(bus);
list_for_each_entry(child, &bus->children, node)

143
drivers/pci/host/pci-ftpci100.c
View file

@ -25,6 +25,7 @@
#include <linux/irqchip/chained_irq.h>
#include <linux/bitops.h>
#include <linux/irq.h>
#include <linux/clk.h>
/*
* Special configuration registers directly in the first few words
@ -37,6 +38,7 @@
#define PCI_CONFIG 0x28 /* PCI configuration command register */
#define PCI_DATA 0x2C
#define FARADAY_PCI_STATUS_CMD 0x04 /* Status and command */
#define FARADAY_PCI_PMC 0x40 /* Power management control */
#define FARADAY_PCI_PMCSR 0x44 /* Power management status */
#define FARADAY_PCI_CTRL1 0x48 /* Control register 1 */
@ -45,6 +47,8 @@
#define FARADAY_PCI_MEM2_BASE_SIZE 0x54 /* Memory base and size #2 */
#define FARADAY_PCI_MEM3_BASE_SIZE 0x58 /* Memory base and size #3 */
#define PCI_STATUS_66MHZ_CAPABLE BIT(21)
/* Bits 31..28 gives INTD..INTA status */
#define PCI_CTRL2_INTSTS_SHIFT 28
#define PCI_CTRL2_INTMASK_CMDERR BIT(27)
@ -117,6 +121,7 @@ struct faraday_pci {
void __iomem *base;
struct irq_domain *irqdomain;
struct pci_bus *bus;
struct clk *bus_clk;
};
static int faraday_res_to_memcfg(resource_size_t mem_base,
@ -178,12 +183,11 @@ static int faraday_res_to_memcfg(resource_size_t mem_base,
return 0;
}
static int faraday_pci_read_config(struct pci_bus *bus, unsigned int fn,
int config, int size, u32 *value)
static int faraday_raw_pci_read_config(struct faraday_pci *p, int bus_number,
unsigned int fn, int config, int size,
u32 *value)
{
struct faraday_pci *p = bus->sysdata;
writel(PCI_CONF_BUS(bus->number) |
writel(PCI_CONF_BUS(bus_number) |
PCI_CONF_DEVICE(PCI_SLOT(fn)) |
PCI_CONF_FUNCTION(PCI_FUNC(fn)) |
PCI_CONF_WHERE(config) |
@ -197,24 +201,28 @@ static int faraday_pci_read_config(struct pci_bus *bus, unsigned int fn,
else if (size == 2)
*value = (*value >> (8 * (config & 3))) & 0xFFFF;
return PCIBIOS_SUCCESSFUL;
}
static int faraday_pci_read_config(struct pci_bus *bus, unsigned int fn,
int config, int size, u32 *value)
{
struct faraday_pci *p = bus->sysdata;
dev_dbg(&bus->dev,
"[read] slt: %.2d, fnc: %d, cnf: 0x%.2X, val (%d bytes): 0x%.8X\n",
PCI_SLOT(fn), PCI_FUNC(fn), config, size, *value);
return PCIBIOS_SUCCESSFUL;
return faraday_raw_pci_read_config(p, bus->number, fn, config, size, value);
}
static int faraday_pci_write_config(struct pci_bus *bus, unsigned int fn,
int config, int size, u32 value)
static int faraday_raw_pci_write_config(struct faraday_pci *p, int bus_number,
unsigned int fn, int config, int size,
u32 value)
{
struct faraday_pci *p = bus->sysdata;
int ret = PCIBIOS_SUCCESSFUL;
dev_dbg(&bus->dev,
"[write] slt: %.2d, fnc: %d, cnf: 0x%.2X, val (%d bytes): 0x%.8X\n",
PCI_SLOT(fn), PCI_FUNC(fn), config, size, value);
writel(PCI_CONF_BUS(bus->number) |
writel(PCI_CONF_BUS(bus_number) |
PCI_CONF_DEVICE(PCI_SLOT(fn)) |
PCI_CONF_FUNCTION(PCI_FUNC(fn)) |
PCI_CONF_WHERE(config) |
@ -238,6 +246,19 @@ static int faraday_pci_write_config(struct pci_bus *bus, unsigned int fn,
return ret;
}
static int faraday_pci_write_config(struct pci_bus *bus, unsigned int fn,
int config, int size, u32 value)
{
struct faraday_pci *p = bus->sysdata;
dev_dbg(&bus->dev,
"[write] slt: %.2d, fnc: %d, cnf: 0x%.2X, val (%d bytes): 0x%.8X\n",
PCI_SLOT(fn), PCI_FUNC(fn), config, size, value);
return faraday_raw_pci_write_config(p, bus->number, fn, config, size,
value);
}
static struct pci_ops faraday_pci_ops = {
.read = faraday_pci_read_config,
.write = faraday_pci_write_config,
@ -248,10 +269,10 @@ static void faraday_pci_ack_irq(struct irq_data *d)
struct faraday_pci *p = irq_data_get_irq_chip_data(d);
unsigned int reg;
faraday_pci_read_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, &reg);
faraday_raw_pci_read_config(p, 0, 0, FARADAY_PCI_CTRL2, 4, &reg);
reg &= ~(0xF << PCI_CTRL2_INTSTS_SHIFT);
reg |= BIT(irqd_to_hwirq(d) + PCI_CTRL2_INTSTS_SHIFT);
faraday_pci_write_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, reg);
faraday_raw_pci_write_config(p, 0, 0, FARADAY_PCI_CTRL2, 4, reg);
}
static void faraday_pci_mask_irq(struct irq_data *d)
@ -259,10 +280,10 @@ static void faraday_pci_mask_irq(struct irq_data *d)
struct faraday_pci *p = irq_data_get_irq_chip_data(d);
unsigned int reg;
faraday_pci_read_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, &reg);
faraday_raw_pci_read_config(p, 0, 0, FARADAY_PCI_CTRL2, 4, &reg);
reg &= ~((0xF << PCI_CTRL2_INTSTS_SHIFT)
| BIT(irqd_to_hwirq(d) + PCI_CTRL2_INTMASK_SHIFT));
faraday_pci_write_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, reg);
faraday_raw_pci_write_config(p, 0, 0, FARADAY_PCI_CTRL2, 4, reg);
}
static void faraday_pci_unmask_irq(struct irq_data *d)
@ -270,10 +291,10 @@ static void faraday_pci_unmask_irq(struct irq_data *d)
struct faraday_pci *p = irq_data_get_irq_chip_data(d);
unsigned int reg;
faraday_pci_read_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, &reg);
faraday_raw_pci_read_config(p, 0, 0, FARADAY_PCI_CTRL2, 4, &reg);
reg &= ~(0xF << PCI_CTRL2_INTSTS_SHIFT);
reg |= BIT(irqd_to_hwirq(d) + PCI_CTRL2_INTMASK_SHIFT);
faraday_pci_write_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, reg);
faraday_raw_pci_write_config(p, 0, 0, FARADAY_PCI_CTRL2, 4, reg);
}
static void faraday_pci_irq_handler(struct irq_desc *desc)
@ -282,7 +303,7 @@ static void faraday_pci_irq_handler(struct irq_desc *desc)
struct irq_chip *irqchip = irq_desc_get_chip(desc);
unsigned int irq_stat, reg, i;
faraday_pci_read_config(p->bus, 0, FARADAY_PCI_CTRL2, 4, &reg);
faraday_raw_pci_read_config(p, 0, 0, FARADAY_PCI_CTRL2, 4, &reg);
irq_stat = reg >> PCI_CTRL2_INTSTS_SHIFT;
chained_irq_enter(irqchip, desc);
@ -403,8 +424,8 @@ static int faraday_pci_parse_map_dma_ranges(struct faraday_pci *p,
dev_info(dev, "DMA MEM%d BASE: 0x%016llx -> 0x%016llx config %08x\n",
i + 1, range.pci_addr, end, val);
if (i <= 2) {
faraday_pci_write_config(p->bus, 0, confreg[i],
4, val);
faraday_raw_pci_write_config(p, 0, 0, confreg[i],
4, val);
} else {
dev_err(dev, "ignore extraneous dma-range %d\n", i);
break;
@ -428,11 +449,14 @@ static int faraday_pci_probe(struct platform_device *pdev)
struct resource *mem;
struct resource *io;
struct pci_host_bridge *host;
struct clk *clk;
unsigned char max_bus_speed = PCI_SPEED_33MHz;
unsigned char cur_bus_speed = PCI_SPEED_33MHz;
int ret;
u32 val;
LIST_HEAD(res);
host = pci_alloc_host_bridge(sizeof(*p));
host = devm_pci_alloc_host_bridge(dev, sizeof(*p));
if (!host)
return -ENOMEM;
@ -440,10 +464,30 @@ static int faraday_pci_probe(struct platform_device *pdev)
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;
/* Retrieve and enable optional clocks */
clk = devm_clk_get(dev, "PCLK");
if (IS_ERR(clk))
return PTR_ERR(clk);
ret = clk_prepare_enable(clk);
if (ret) {
dev_err(dev, "could not prepare PCLK\n");
return ret;
}
p->bus_clk = devm_clk_get(dev, "PCICLK");
if (IS_ERR(p->bus_clk))
return PTR_ERR(clk);
ret = clk_prepare_enable(p->bus_clk);
if (ret) {
dev_err(dev, "could not prepare PCICLK\n");
return ret;
}
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
p->base = devm_ioremap_resource(dev, regs);
if (IS_ERR(p->base))
@ -496,17 +540,8 @@ static int faraday_pci_probe(struct platform_device *pdev)
val |= PCI_COMMAND_MEMORY;
val |= PCI_COMMAND_MASTER;
writel(val, p->base + PCI_CTRL);
list_splice_init(&res, &host->windows);
ret = pci_register_host_bridge(host);
if (ret) {
dev_err(dev, "failed to register host: %d\n", ret);
return ret;
}
p->bus = host->bus;
/* Mask and clear all interrupts */
faraday_pci_write_config(p->bus, 0, FARADAY_PCI_CTRL2 + 2, 2, 0xF000);
faraday_raw_pci_write_config(p, 0, 0, FARADAY_PCI_CTRL2 + 2, 2, 0xF000);
if (variant->cascaded_irq) {
ret = faraday_pci_setup_cascaded_irq(p);
if (ret) {
@ -515,12 +550,48 @@ static int faraday_pci_probe(struct platform_device *pdev)
}
}
/* Check bus clock if we can gear up to 66 MHz */
if (!IS_ERR(p->bus_clk)) {
unsigned long rate;
u32 val;
faraday_raw_pci_read_config(p, 0, 0,
FARADAY_PCI_STATUS_CMD, 4, &val);
rate = clk_get_rate(p->bus_clk);
if ((rate == 33000000) && (val & PCI_STATUS_66MHZ_CAPABLE)) {
dev_info(dev, "33MHz bus is 66MHz capable\n");
max_bus_speed = PCI_SPEED_66MHz;
ret = clk_set_rate(p->bus_clk, 66000000);
if (ret)
dev_err(dev, "failed to set bus clock\n");
} else {
dev_info(dev, "33MHz only bus\n");
max_bus_speed = PCI_SPEED_33MHz;
}
/* Bumping the clock may fail so read back the rate */
rate = clk_get_rate(p->bus_clk);
if (rate == 33000000)
cur_bus_speed = PCI_SPEED_33MHz;
if (rate == 66000000)
cur_bus_speed = PCI_SPEED_66MHz;
}
ret = faraday_pci_parse_map_dma_ranges(p, dev->of_node);
if (ret)
return ret;
pci_scan_child_bus(p->bus);
pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
list_splice_init(&res, &host->windows);
ret = pci_scan_root_bus_bridge(host);
if (ret) {
dev_err(dev, "failed to scan host: %d\n", ret);
return ret;
}
p->bus = host->bus;
p->bus->max_bus_speed = max_bus_speed;
p->bus->cur_bus_speed = cur_bus_speed;
pci_bus_assign_resources(p->bus);
pci_bus_add_devices(p->bus);
pci_free_resource_list(&res);

27
drivers/pci/host/pci-host-common.c
View file

@ -117,8 +117,14 @@ int pci_host_common_probe(struct platform_device *pdev,
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct pci_bus *bus, *child;
struct pci_host_bridge *bridge;
struct pci_config_window *cfg;
struct list_head resources;
int ret;
bridge = devm_pci_alloc_host_bridge(dev, 0);
if (!bridge)
return -ENOMEM;
type = of_get_property(np, "device_type", NULL);
if (!type || strcmp(type, "pci")) {
@ -138,16 +144,21 @@ int pci_host_common_probe(struct platform_device *pdev,
if (!pci_has_flag(PCI_PROBE_ONLY))
pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS);
bus = pci_scan_root_bus(dev, cfg->busr.start, &ops->pci_ops, cfg,
&resources);
if (!bus) {
dev_err(dev, "Scanning rootbus failed");
return -ENODEV;
list_splice_init(&resources, &bridge->windows);
bridge->dev.parent = dev;
bridge->sysdata = cfg;
bridge->busnr = cfg->busr.start;
bridge->ops = &ops->pci_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) {
dev_err(dev, "Scanning root bridge failed");
return ret;
}
#ifdef CONFIG_ARM
pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
#endif
bus = bridge->bus;
/*
* We insert PCI resources into the iomem_resource and

445
drivers/pci/host/pci-hyperv.c
View file

@ -64,22 +64,39 @@
* major version.
*/
#define PCI_MAKE_VERSION(major, minor) ((u32)(((major) << 16) | (major)))
#define PCI_MAKE_VERSION(major, minor) ((u32)(((major) << 16) | (minor)))
#define PCI_MAJOR_VERSION(version) ((u32)(version) >> 16)
#define PCI_MINOR_VERSION(version) ((u32)(version) & 0xff)
enum {
PCI_PROTOCOL_VERSION_1_1 = PCI_MAKE_VERSION(1, 1),
PCI_PROTOCOL_VERSION_CURRENT = PCI_PROTOCOL_VERSION_1_1
enum pci_protocol_version_t {
PCI_PROTOCOL_VERSION_1_1 = PCI_MAKE_VERSION(1, 1), /* Win10 */
PCI_PROTOCOL_VERSION_1_2 = PCI_MAKE_VERSION(1, 2), /* RS1 */
};
#define CPU_AFFINITY_ALL -1ULL
/*
* Supported protocol versions in the order of probing - highest go
* first.
*/
static enum pci_protocol_version_t pci_protocol_versions[] = {
PCI_PROTOCOL_VERSION_1_2,
PCI_PROTOCOL_VERSION_1_1,
};
/*
* Protocol version negotiated by hv_pci_protocol_negotiation().
*/
static enum pci_protocol_version_t pci_protocol_version;
#define PCI_CONFIG_MMIO_LENGTH 0x2000
#define CFG_PAGE_OFFSET 0x1000
#define CFG_PAGE_SIZE (PCI_CONFIG_MMIO_LENGTH - CFG_PAGE_OFFSET)
#define MAX_SUPPORTED_MSI_MESSAGES 0x400
#define STATUS_REVISION_MISMATCH 0xC0000059
/*
* Message Types
*/
@ -109,6 +126,9 @@ enum pci_message_type {
PCI_QUERY_PROTOCOL_VERSION = PCI_MESSAGE_BASE + 0x13,
PCI_CREATE_INTERRUPT_MESSAGE = PCI_MESSAGE_BASE + 0x14,
PCI_DELETE_INTERRUPT_MESSAGE = PCI_MESSAGE_BASE + 0x15,
PCI_RESOURCES_ASSIGNED2 = PCI_MESSAGE_BASE + 0x16,
PCI_CREATE_INTERRUPT_MESSAGE2 = PCI_MESSAGE_BASE + 0x17,
PCI_DELETE_INTERRUPT_MESSAGE2 = PCI_MESSAGE_BASE + 0x18, /* unused */
PCI_MESSAGE_MAXIMUM
};
@ -178,6 +198,30 @@ struct hv_msi_desc {
u64 cpu_mask;
} __packed;
/**
* struct hv_msi_desc2 - 1.2 version of hv_msi_desc
* @vector: IDT entry
* @delivery_mode: As defined in Intel's Programmer's
* Reference Manual, Volume 3, Chapter 8.
* @vector_count: Number of contiguous entries in the
* Interrupt Descriptor Table that are
* occupied by this Message-Signaled
* Interrupt. For "MSI", as first defined
* in PCI 2.2, this can be between 1 and
* 32. For "MSI-X," as first defined in PCI
* 3.0, this must be 1, as each MSI-X table
* entry would have its own descriptor.
* @processor_count: number of bits enabled in array.
* @processor_array: All the target virtual processors.
*/
struct hv_msi_desc2 {
u8 vector;
u8 delivery_mode;
u16 vector_count;
u16 processor_count;
u16 processor_array[32];
} __packed;
/**
* struct tran_int_desc
* @reserved: unused, padding
@ -245,7 +289,7 @@ struct pci_packet {
struct pci_version_request {
struct pci_message message_type;
enum pci_message_type protocol_version;
u32 protocol_version;
} __packed;
/*
@ -294,6 +338,14 @@ struct pci_resources_assigned {
u32 reserved[4];
} __packed;
struct pci_resources_assigned2 {
struct pci_message message_type;
union win_slot_encoding wslot;
u8 memory_range[0x14][6]; /* not used here */
u32 msi_descriptor_count;
u8 reserved[70];
} __packed;
struct pci_create_interrupt {
struct pci_message message_type;
union win_slot_encoding wslot;
@ -306,6 +358,12 @@ struct pci_create_int_response {
struct tran_int_desc int_desc;
} __packed;
struct pci_create_interrupt2 {
struct pci_message message_type;
union win_slot_encoding wslot;
struct hv_msi_desc2 int_desc;
} __packed;
struct pci_delete_interrupt {
struct pci_message message_type;
union win_slot_encoding wslot;
@ -331,17 +389,42 @@ static int pci_ring_size = (4 * PAGE_SIZE);
#define HV_PARTITION_ID_SELF ((u64)-1)
#define HVCALL_RETARGET_INTERRUPT 0x7e
struct retarget_msi_interrupt {
u64 partition_id; /* use "self" */
u64 device_id;
struct hv_interrupt_entry {
u32 source; /* 1 for MSI(-X) */
u32 reserved1;
u32 address;
u32 data;
u64 reserved2;
};
#define HV_VP_SET_BANK_COUNT_MAX 5 /* current implementation limit */
struct hv_vp_set {
u64 format; /* 0 (HvGenericSetSparse4k) */
u64 valid_banks;
u64 masks[HV_VP_SET_BANK_COUNT_MAX];
};
/*
* flags for hv_device_interrupt_target.flags
*/
#define HV_DEVICE_INTERRUPT_TARGET_MULTICAST 1
#define HV_DEVICE_INTERRUPT_TARGET_PROCESSOR_SET 2
struct hv_device_interrupt_target {
u32 vector;
u32 flags;
u64 vp_mask;
union {
u64 vp_mask;
struct hv_vp_set vp_set;
};
};
struct retarget_msi_interrupt {
u64 partition_id; /* use "self" */
u64 device_id;
struct hv_interrupt_entry int_entry;
u64 reserved2;
struct hv_device_interrupt_target int_target;
} __packed;
/*
@ -382,7 +465,10 @@ struct hv_pcibus_device {
struct msi_domain_info msi_info;
struct msi_controller msi_chip;
struct irq_domain *irq_domain;
/* hypercall arg, must not cross page boundary */
struct retarget_msi_interrupt retarget_msi_interrupt_params;
spinlock_t retarget_msi_interrupt_lock;
};
@ -476,6 +562,52 @@ static void put_pcichild(struct hv_pci_dev *hv_pcidev,
static void get_hvpcibus(struct hv_pcibus_device *hv_pcibus);
static void put_hvpcibus(struct hv_pcibus_device *hv_pcibus);
/*
* Temporary CPU to vCPU mapping to address transitioning
* vmbus_cpu_number_to_vp_number() being migrated to
* hv_cpu_number_to_vp_number() in a separate patch. Once that patch
* has been picked up in the main line, remove this code here and use
* the official code.
*/
static struct hv_tmpcpumap
{
bool initialized;
u32 vp_index[NR_CPUS];
} hv_tmpcpumap;
static void hv_tmpcpumap_init_cpu(void *_unused)
{
int cpu = smp_processor_id();
u64 vp_index;
hv_get_vp_index(vp_index);
hv_tmpcpumap.vp_index[cpu] = vp_index;
}
static void hv_tmpcpumap_init(void)
{
if (hv_tmpcpumap.initialized)
return;
memset(hv_tmpcpumap.vp_index, -1, sizeof(hv_tmpcpumap.vp_index));
on_each_cpu(hv_tmpcpumap_init_cpu, NULL, true);
hv_tmpcpumap.initialized = true;
}
/**
* hv_tmp_cpu_nr_to_vp_nr() - Convert Linux CPU nr to Hyper-V vCPU nr
*
* Remove once vmbus_cpu_number_to_vp_number() has been converted to
* hv_cpu_number_to_vp_number() and replace callers appropriately.
*/
static u32 hv_tmp_cpu_nr_to_vp_nr(int cpu)
{
return hv_tmpcpumap.vp_index[cpu];
}
/**
* devfn_to_wslot() - Convert from Linux PCI slot to Windows
* @devfn: The Linux representation of PCI slot
@ -786,8 +918,11 @@ static void hv_irq_unmask(struct irq_data *data)
struct cpumask *dest;
struct pci_bus *pbus;
struct pci_dev *pdev;
int cpu;
unsigned long flags;
u32 var_size = 0;
int cpu_vmbus;
int cpu;
u64 res;
dest = irq_data_get_affinity_mask(data);
pdev = msi_desc_to_pci_dev(msi_desc);
@ -799,23 +934,74 @@ static void hv_irq_unmask(struct irq_data *data)
params = &hbus->retarget_msi_interrupt_params;
memset(params, 0, sizeof(*params));
params->partition_id = HV_PARTITION_ID_SELF;
params->source = 1; /* MSI(-X) */
params->address = msi_desc->msg.address_lo;
params->data = msi_desc->msg.data;
params->int_entry.source = 1; /* MSI(-X) */
params->int_entry.address = msi_desc->msg.address_lo;
params->int_entry.data = msi_desc->msg.data;
params->device_id = (hbus->hdev->dev_instance.b[5] << 24) |
(hbus->hdev->dev_instance.b[4] << 16) |
(hbus->hdev->dev_instance.b[7] << 8) |
(hbus->hdev->dev_instance.b[6] & 0xf8) |
PCI_FUNC(pdev->devfn);
params->vector = cfg->vector;
params->int_target.vector = cfg->vector;
for_each_cpu_and(cpu, dest, cpu_online_mask)
params->vp_mask |= (1ULL << vmbus_cpu_number_to_vp_number(cpu));
/*
* Honoring apic->irq_delivery_mode set to dest_Fixed by
* setting the HV_DEVICE_INTERRUPT_TARGET_MULTICAST flag results in a
* spurious interrupt storm. Not doing so does not seem to have a
* negative effect (yet?).
*/
hv_do_hypercall(HVCALL_RETARGET_INTERRUPT, params, NULL);
if (pci_protocol_version >= PCI_PROTOCOL_VERSION_1_2) {
/*
* PCI_PROTOCOL_VERSION_1_2 supports the VP_SET version of the
* HVCALL_RETARGET_INTERRUPT hypercall, which also coincides
* with >64 VP support.
* ms_hyperv.hints & HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED
* is not sufficient for this hypercall.
*/
params->int_target.flags |=
HV_DEVICE_INTERRUPT_TARGET_PROCESSOR_SET;
params->int_target.vp_set.valid_banks =
(1ull << HV_VP_SET_BANK_COUNT_MAX) - 1;
/*
* var-sized hypercall, var-size starts after vp_mask (thus
* vp_set.format does not count, but vp_set.valid_banks does).
*/
var_size = 1 + HV_VP_SET_BANK_COUNT_MAX;
for_each_cpu_and(cpu, dest, cpu_online_mask) {
cpu_vmbus = hv_tmp_cpu_nr_to_vp_nr(cpu);
if (cpu_vmbus >= HV_VP_SET_BANK_COUNT_MAX * 64) {
dev_err(&hbus->hdev->device,
"too high CPU %d", cpu_vmbus);
res = 1;
goto exit_unlock;
}
params->int_target.vp_set.masks[cpu_vmbus / 64] |=
(1ULL << (cpu_vmbus & 63));
}
} else {
for_each_cpu_and(cpu, dest, cpu_online_mask) {
params->int_target.vp_mask |=
(1ULL << hv_tmp_cpu_nr_to_vp_nr(cpu));
}
}
res = hv_do_hypercall(HVCALL_RETARGET_INTERRUPT | (var_size << 17),
params, NULL);
exit_unlock:
spin_unlock_irqrestore(&hbus->retarget_msi_interrupt_lock, flags);
if (res) {
dev_err(&hbus->hdev->device,
"%s() failed: %#llx", __func__, res);
return;
}
pci_msi_unmask_irq(data);
}
@ -836,6 +1022,53 @@ static void hv_pci_compose_compl(void *context, struct pci_response *resp,
complete(&comp_pkt->comp_pkt.host_event);
}
static u32 hv_compose_msi_req_v1(
struct pci_create_interrupt *int_pkt, struct cpumask *affinity,
u32 slot, u8 vector)
{
int_pkt->message_type.type = PCI_CREATE_INTERRUPT_MESSAGE;
int_pkt->wslot.slot = slot;
int_pkt->int_desc.vector = vector;
int_pkt->int_desc.vector_count = 1;
int_pkt->int_desc.delivery_mode =
(apic->irq_delivery_mode == dest_LowestPrio) ?
dest_LowestPrio : dest_Fixed;
/*
* Create MSI w/ dummy vCPU set, overwritten by subsequent retarget in
* hv_irq_unmask().
*/
int_pkt->int_desc.cpu_mask = CPU_AFFINITY_ALL;
return sizeof(*int_pkt);
}
static u32 hv_compose_msi_req_v2(
struct pci_create_interrupt2 *int_pkt, struct cpumask *affinity,
u32 slot, u8 vector)
{
int cpu;
int_pkt->message_type.type = PCI_CREATE_INTERRUPT_MESSAGE2;
int_pkt->wslot.slot = slot;
int_pkt->int_desc.vector = vector;
int_pkt->int_desc.vector_count = 1;
int_pkt->int_desc.delivery_mode =
(apic->irq_delivery_mode == dest_LowestPrio) ?
dest_LowestPrio : dest_Fixed;
/*
* Create MSI w/ dummy vCPU set targeting just one vCPU, overwritten
* by subsequent retarget in hv_irq_unmask().
*/
cpu = cpumask_first_and(affinity, cpu_online_mask);
int_pkt->int_desc.processor_array[0] =
hv_tmp_cpu_nr_to_vp_nr(cpu);
int_pkt->int_desc.processor_count = 1;
return sizeof(*int_pkt);
}
/**
* hv_compose_msi_msg() - Supplies a valid MSI address/data
* @data: Everything about this MSI
@ -854,15 +1087,17 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
struct hv_pci_dev *hpdev;
struct pci_bus *pbus;
struct pci_dev *pdev;
struct pci_create_interrupt *int_pkt;
struct compose_comp_ctxt comp;
struct tran_int_desc *int_desc;
struct cpumask *affinity;
struct {
struct pci_packet pkt;
u8 buffer[sizeof(struct pci_create_interrupt)];
} ctxt;
int cpu;
struct pci_packet pci_pkt;
union {
struct pci_create_interrupt v1;
struct pci_create_interrupt2 v2;
} int_pkts;
} __packed ctxt;
u32 size;
int ret;
pdev = msi_desc_to_pci_dev(irq_data_get_msi_desc(data));
@ -885,36 +1120,44 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
memset(&ctxt, 0, sizeof(ctxt));
init_completion(&comp.comp_pkt.host_event);
ctxt.pkt.completion_func = hv_pci_compose_compl;
ctxt.pkt.compl_ctxt = &comp;
int_pkt = (struct pci_create_interrupt *)&ctxt.pkt.message;
int_pkt->message_type.type = PCI_CREATE_INTERRUPT_MESSAGE;
int_pkt->wslot.slot = hpdev->desc.win_slot.slot;
int_pkt->int_desc.vector = cfg->vector;
int_pkt->int_desc.vector_count = 1;
int_pkt->int_desc.delivery_mode =
(apic->irq_delivery_mode == dest_LowestPrio) ? 1 : 0;
ctxt.pci_pkt.completion_func = hv_pci_compose_compl;
ctxt.pci_pkt.compl_ctxt = &comp;
/*
* This bit doesn't have to work on machines with more than 64
* processors because Hyper-V only supports 64 in a guest.
*/
affinity = irq_data_get_affinity_mask(data);
if (cpumask_weight(affinity) >= 32) {
int_pkt->int_desc.cpu_mask = CPU_AFFINITY_ALL;
} else {
for_each_cpu_and(cpu, affinity, cpu_online_mask) {
int_pkt->int_desc.cpu_mask |=
(1ULL << vmbus_cpu_number_to_vp_number(cpu));
}
switch (pci_protocol_version) {
case PCI_PROTOCOL_VERSION_1_1:
size = hv_compose_msi_req_v1(&ctxt.int_pkts.v1,
irq_data_get_affinity_mask(data),
hpdev->desc.win_slot.slot,
cfg->vector);
break;
case PCI_PROTOCOL_VERSION_1_2:
size = hv_compose_msi_req_v2(&ctxt.int_pkts.v2,
irq_data_get_affinity_mask(data),
hpdev->desc.win_slot.slot,
cfg->vector);
break;
default:
/* As we only negotiate protocol versions known to this driver,
* this path should never hit. However, this is it not a hot
* path so we print a message to aid future updates.
*/
dev_err(&hbus->hdev->device,
"Unexpected vPCI protocol, update driver.");
goto free_int_desc;
}
ret = vmbus_sendpacket(hpdev->hbus->hdev->channel, int_pkt,
sizeof(*int_pkt), (unsigned long)&ctxt.pkt,
ret = vmbus_sendpacket(hpdev->hbus->hdev->channel, &ctxt.int_pkts,
size, (unsigned long)&ctxt.pci_pkt,
VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
if (ret)
if (ret) {
dev_err(&hbus->hdev->device,
"Sending request for interrupt failed: 0x%x",
comp.comp_pkt.completion_status);
goto free_int_desc;
}
wait_for_completion(&comp.comp_pkt.host_event);
@ -1513,12 +1756,12 @@ static void pci_devices_present_work(struct work_struct *work)
put_pcichild(hpdev, hv_pcidev_ref_initial);
}
switch(hbus->state) {
switch (hbus->state) {
case hv_pcibus_installed:
/*
* Tell the core to rescan bus
* because there may have been changes.
*/
* Tell the core to rescan bus
* because there may have been changes.
*/
pci_lock_rescan_remove();
pci_scan_child_bus(hbus->pci_bus);
pci_unlock_rescan_remove();
@ -1800,6 +2043,7 @@ static int hv_pci_protocol_negotiation(struct hv_device *hdev)
struct hv_pci_compl comp_pkt;
struct pci_packet *pkt;
int ret;
int i;
/*
* Initiate the handshake with the host and negotiate
@ -1816,26 +2060,44 @@ static int hv_pci_protocol_negotiation(struct hv_device *hdev)
pkt->compl_ctxt = &comp_pkt;
version_req = (struct pci_version_request *)&pkt->message;
version_req->message_type.type = PCI_QUERY_PROTOCOL_VERSION;
version_req->protocol_version = PCI_PROTOCOL_VERSION_CURRENT;
ret = vmbus_sendpacket(hdev->channel, version_req,
sizeof(struct pci_version_request),
(unsigned long)pkt, VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
if (ret)
goto exit;
for (i = 0; i < ARRAY_SIZE(pci_protocol_versions); i++) {
version_req->protocol_version = pci_protocol_versions[i];
ret = vmbus_sendpacket(hdev->channel, version_req,
sizeof(struct pci_version_request),
(unsigned long)pkt, VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
if (ret) {
dev_err(&hdev->device,
"PCI Pass-through VSP failed sending version reqquest: %#x",
ret);
goto exit;
}
wait_for_completion(&comp_pkt.host_event);
wait_for_completion(&comp_pkt.host_event);
if (comp_pkt.completion_status < 0) {
dev_err(&hdev->device,
"PCI Pass-through VSP failed version request %x\n",
comp_pkt.completion_status);
ret = -EPROTO;
goto exit;
if (comp_pkt.completion_status >= 0) {
pci_protocol_version = pci_protocol_versions[i];
dev_info(&hdev->device,
"PCI VMBus probing: Using version %#x\n",
pci_protocol_version);
goto exit;
}
if (comp_pkt.completion_status != STATUS_REVISION_MISMATCH) {
dev_err(&hdev->device,
"PCI Pass-through VSP failed version request: %#x",
comp_pkt.completion_status);
ret = -EPROTO;
goto exit;
}
reinit_completion(&comp_pkt.host_event);
}
ret = 0;
dev_err(&hdev->device,
"PCI pass-through VSP failed to find supported version");
ret = -EPROTO;
exit:
kfree(pkt);
@ -2094,13 +2356,18 @@ static int hv_send_resources_allocated(struct hv_device *hdev)
{
struct hv_pcibus_device *hbus = hv_get_drvdata(hdev);
struct pci_resources_assigned *res_assigned;
struct pci_resources_assigned2 *res_assigned2;
struct hv_pci_compl comp_pkt;
struct hv_pci_dev *hpdev;
struct pci_packet *pkt;
size_t size_res;
u32 wslot;
int ret;
pkt = kmalloc(sizeof(*pkt) + sizeof(*res_assigned), GFP_KERNEL);
size_res = (pci_protocol_version < PCI_PROTOCOL_VERSION_1_2)
? sizeof(*res_assigned) : sizeof(*res_assigned2);
pkt = kmalloc(sizeof(*pkt) + size_res, GFP_KERNEL);
if (!pkt)
return -ENOMEM;
@ -2111,22 +2378,30 @@ static int hv_send_resources_allocated(struct hv_device *hdev)
if (!hpdev)
continue;
memset(pkt, 0, sizeof(*pkt) + sizeof(*res_assigned));
memset(pkt, 0, sizeof(*pkt) + size_res);
init_completion(&comp_pkt.host_event);
pkt->completion_func = hv_pci_generic_compl;
pkt->compl_ctxt = &comp_pkt;
res_assigned = (struct pci_resources_assigned *)&pkt->message;
res_assigned->message_type.type = PCI_RESOURCES_ASSIGNED;
res_assigned->wslot.slot = hpdev->desc.win_slot.slot;
if (pci_protocol_version < PCI_PROTOCOL_VERSION_1_2) {
res_assigned =
(struct pci_resources_assigned *)&pkt->message;
res_assigned->message_type.type =
PCI_RESOURCES_ASSIGNED;
res_assigned->wslot.slot = hpdev->desc.win_slot.slot;
} else {
res_assigned2 =
(struct pci_resources_assigned2 *)&pkt->message;
res_assigned2->message_type.type =
PCI_RESOURCES_ASSIGNED2;
res_assigned2->wslot.slot = hpdev->desc.win_slot.slot;
}
put_pcichild(hpdev, hv_pcidev_ref_by_slot);
ret = vmbus_sendpacket(
hdev->channel, &pkt->message,
sizeof(*res_assigned),
(unsigned long)pkt,
VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
ret = vmbus_sendpacket(hdev->channel, &pkt->message,
size_res, (unsigned long)pkt,
VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
if (ret)
break;
@ -2204,11 +2479,19 @@ static int hv_pci_probe(struct hv_device *hdev,
struct hv_pcibus_device *hbus;
int ret;
hbus = kzalloc(sizeof(*hbus), GFP_KERNEL);
/*
* hv_pcibus_device contains the hypercall arguments for retargeting in
* hv_irq_unmask(). Those must not cross a page boundary.
*/
BUILD_BUG_ON(sizeof(*hbus) > PAGE_SIZE);
hbus = (struct hv_pcibus_device *)get_zeroed_page(GFP_KERNEL);
if (!hbus)
return -ENOMEM;
hbus->state = hv_pcibus_init;
hv_tmpcpumap_init();
/*
* The PCI bus "domain" is what is called "segment" in ACPI and
* other specs. Pull it from the instance ID, to get something
@ -2308,7 +2591,7 @@ static int hv_pci_probe(struct hv_device *hdev,
close:
vmbus_close(hdev->channel);
free_bus:
kfree(hbus);
free_page((unsigned long)hbus);
return ret;
}
@ -2386,7 +2669,7 @@ static int hv_pci_remove(struct hv_device *hdev)
irq_domain_free_fwnode(hbus->sysdata.fwnode);
put_hvpcibus(hbus);
wait_for_completion(&hbus->remove_event);
kfree(hbus);
free_page((unsigned long)hbus);
return 0;
}

2
drivers/pci/host/pci-rcar-gen2.c
View file

@ -429,7 +429,7 @@ static int rcar_pci_probe(struct platform_device *pdev)
return 0;
}
static struct of_device_id rcar_pci_of_match[] = {
static const struct of_device_id rcar_pci_of_match[] = {
{ .compatible = "renesas,pci-r8a7790", },
{ .compatible = "renesas,pci-r8a7791", },
{ .compatible = "renesas,pci-r8a7794", },

42
drivers/pci/host/pci-tegra.c
View file

@ -233,8 +233,8 @@ struct tegra_msi {
struct msi_controller chip;
DECLARE_BITMAP(used, INT_PCI_MSI_NR);
struct irq_domain *domain;
unsigned long pages;
struct mutex lock;
u64 phys;
int irq;
};
@ -1448,9 +1448,8 @@ static int tegra_msi_setup_irq(struct msi_controller *chip,
irq_set_msi_desc(irq, desc);
msg.address_lo = virt_to_phys((void *)msi->pages);
/* 32 bit address only */
msg.address_hi = 0;
msg.address_lo = lower_32_bits(msi->phys);
msg.address_hi = upper_32_bits(msi->phys);
msg.data = hwirq;
pci_write_msi_msg(irq, &msg);
@ -1499,7 +1498,6 @@ static int tegra_pcie_enable_msi(struct tegra_pcie *pcie)
const struct tegra_pcie_soc *soc = pcie->soc;
struct tegra_msi *msi = &pcie->msi;
struct device *dev = pcie->dev;
unsigned long base;
int err;
u32 reg;
@ -1531,12 +1529,25 @@ static int tegra_pcie_enable_msi(struct tegra_pcie *pcie)
goto err;
}
/* setup AFI/FPCI range */
msi->pages = __get_free_pages(GFP_KERNEL, 0);
base = virt_to_phys((void *)msi->pages);
/*
* The PCI host bridge on Tegra contains some logic that intercepts
* MSI writes, which means that the MSI target address doesn't have
* to point to actual physical memory. Rather than allocating one 4
* KiB page of system memory that's never used, we can simply pick
* an arbitrary address within an area reserved for system memory
* in the FPCI address map.
*
* However, in order to avoid confusion, we pick an address that
* doesn't map to physical memory. The FPCI address map reserves a
* 1012 GiB region for system memory and memory-mapped I/O. Since
* none of the Tegra SoCs that contain this PCI host bridge can
* address more than 16 GiB of system memory, the last 4 KiB of
* these 1012 GiB is a good candidate.
*/
msi->phys = 0xfcfffff000;
afi_writel(pcie, base >> soc->msi_base_shift, AFI_MSI_FPCI_BAR_ST);
afi_writel(pcie, base, AFI_MSI_AXI_BAR_ST);
afi_writel(pcie, msi->phys >> soc->msi_base_shift, AFI_MSI_FPCI_BAR_ST);
afi_writel(pcie, msi->phys, AFI_MSI_AXI_BAR_ST);
/* this register is in 4K increments */
afi_writel(pcie, 1, AFI_MSI_BAR_SZ);
@ -1585,8 +1596,6 @@ static int tegra_pcie_disable_msi(struct tegra_pcie *pcie)
afi_writel(pcie, 0, AFI_MSI_EN_VEC6);
afi_writel(pcie, 0, AFI_MSI_EN_VEC7);
free_pages(msi->pages, 0);
if (msi->irq > 0)
free_irq(msi->irq, pcie);
@ -2238,7 +2247,7 @@ static int tegra_pcie_probe(struct platform_device *pdev)
struct pci_bus *child;
int err;
host = pci_alloc_host_bridge(sizeof(*pcie));
host = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
if (!host)
return -ENOMEM;
@ -2284,16 +2293,15 @@ static int tegra_pcie_probe(struct platform_device *pdev)
host->busnr = pcie->busn.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_register_host_bridge(host);
err = pci_scan_root_bus_bridge(host);
if (err < 0) {
dev_err(dev, "failed to register host: %d\n", err);
goto disable_msi;
}
pci_scan_child_bus(host->bus);
pci_fixup_irqs(pci_common_swizzle, tegra_pcie_map_irq);
pci_bus_size_bridges(host->bus);
pci_bus_assign_resources(host->bus);

36
drivers/pci/host/pci-versatile.c
View file

@ -120,30 +120,35 @@ static int versatile_pci_parse_request_of_pci_ranges(struct device *dev,
static int versatile_pci_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
int ret, i, myslot = -1;
u32 val;
void __iomem *local_pci_cfg_base;
struct pci_bus *bus, *child;
struct pci_host_bridge *bridge;
LIST_HEAD(pci_res);
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(&pdev->dev, res);
versatile_pci_base = devm_ioremap_resource(dev, res);
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(&pdev->dev, res);
versatile_cfg_base[0] = devm_ioremap_resource(dev, res);
if (IS_ERR(versatile_cfg_base[0]))
return PTR_ERR(versatile_cfg_base[0]);
res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
versatile_cfg_base[1] = devm_pci_remap_cfg_resource(&pdev->dev,
res);
versatile_cfg_base[1] = devm_pci_remap_cfg_resource(dev, res);
if (IS_ERR(versatile_cfg_base[1]))
return PTR_ERR(versatile_cfg_base[1]);
ret = versatile_pci_parse_request_of_pci_ranges(&pdev->dev, &pci_res);
ret = versatile_pci_parse_request_of_pci_ranges(dev, &pci_res);
if (ret)
return ret;
@ -159,7 +164,7 @@ static int versatile_pci_probe(struct platform_device *pdev)
}
}
if (myslot == -1) {
dev_err(&pdev->dev, "Cannot find PCI core!\n");
dev_err(dev, "Cannot find PCI core!\n");
return -EIO;
}
/*
@ -167,7 +172,7 @@ static int versatile_pci_probe(struct platform_device *pdev)
*/
pci_slot_ignore |= (1 << myslot);
dev_info(&pdev->dev, "PCI core found (slot %d)\n", myslot);
dev_info(dev, "PCI core found (slot %d)\n", myslot);
writel(myslot, PCI_SELFID);
local_pci_cfg_base = versatile_cfg_base[1] + (myslot << 11);
@ -199,11 +204,20 @@ static int versatile_pci_probe(struct platform_device *pdev)
pci_add_flags(PCI_ENABLE_PROC_DOMAINS);
pci_add_flags(PCI_REASSIGN_ALL_BUS | PCI_REASSIGN_ALL_RSRC);
bus = pci_scan_root_bus(&pdev->dev, 0, &pci_versatile_ops, NULL, &pci_res);
if (!bus)
return -ENOMEM;
list_splice_init(&pci_res, &bridge->windows);
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_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
pci_assign_unassigned_bus_resources(bus);
list_for_each_entry(child, &bus->children, node)
pcie_bus_configure_settings(child);

23
drivers/pci/host/pci-xgene.c
View file

@ -636,13 +636,16 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev)
struct xgene_pcie_port *port;
resource_size_t iobase = 0;
struct pci_bus *bus, *child;
struct pci_host_bridge *bridge;
int ret;
LIST_HEAD(res);
port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
if (!port)
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*port));
if (!bridge)
return -ENOMEM;
port = pci_host_bridge_priv(bridge);
port->node = of_node_get(dn);
port->dev = dev;
@ -670,11 +673,19 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev)
if (ret)
goto error;
bus = pci_create_root_bus(dev, 0, &xgene_pcie_ops, port, &res);
if (!bus) {
ret = -ENOMEM;
list_splice_init(&res, &bridge->windows);
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)
goto error;
}
bus = bridge->bus;
pci_scan_child_bus(bus);
pci_assign_unassigned_bus_resources(bus);

24
drivers/pci/host/pcie-altera.c
View file

@ -579,12 +579,14 @@ static int altera_pcie_probe(struct platform_device *pdev)
struct altera_pcie *pcie;
struct pci_bus *bus;
struct pci_bus *child;
struct pci_host_bridge *bridge;
int ret;
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
if (!bridge)
return -ENOMEM;
pcie = pci_host_bridge_priv(bridge);
pcie->pdev = pdev;
ret = altera_pcie_parse_dt(pcie);
@ -613,12 +615,20 @@ static int altera_pcie_probe(struct platform_device *pdev)
cra_writel(pcie, P2A_INT_ENA_ALL, P2A_INT_ENABLE);
altera_pcie_host_init(pcie);
bus = pci_scan_root_bus(dev, pcie->root_bus_nr, &altera_pcie_ops,
pcie, &pcie->resources);
if (!bus)
return -ENOMEM;
list_splice_init(&pcie->resources, &bridge->windows);
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_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
pci_assign_unassigned_bus_resources(bus);
/* Configure PCI Express setting. */

7
drivers/pci/host/pcie-iproc-bcma.c
View file

@ -45,12 +45,15 @@ static int iproc_pcie_bcma_probe(struct bcma_device *bdev)
struct device *dev = &bdev->dev;
struct iproc_pcie *pcie;
LIST_HEAD(resources);
struct pci_host_bridge *bridge;
int ret;
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
if (!bridge)
return -ENOMEM;
pcie = pci_host_bridge_priv(bridge);
pcie->dev = dev;
pcie->type = IPROC_PCIE_PAXB_BCMA;

7
drivers/pci/host/pcie-iproc-platform.c
View file

@ -52,12 +52,15 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
struct resource reg;
resource_size_t iobase = 0;
LIST_HEAD(resources);
struct pci_host_bridge *bridge;
int ret;
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
if (!bridge)
return -ENOMEM;
pcie = pci_host_bridge_priv(bridge);
pcie->dev = dev;
pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);

135
drivers/pci/host/pcie-iproc.c
View file

@ -452,14 +452,13 @@ static inline void iproc_pcie_apb_err_disable(struct pci_bus *bus,
* Note access to the configuration registers are protected at the higher layer
* by 'pci_lock' in drivers/pci/access.c
*/
static void __iomem *iproc_pcie_map_cfg_bus(struct pci_bus *bus,
static void __iomem *iproc_pcie_map_cfg_bus(struct iproc_pcie *pcie,
int busno,
unsigned int devfn,
int where)
{
struct iproc_pcie *pcie = iproc_data(bus);
unsigned slot = PCI_SLOT(devfn);
unsigned fn = PCI_FUNC(devfn);
unsigned busno = bus->number;
u32 val;
u16 offset;
@ -499,6 +498,58 @@ static void __iomem *iproc_pcie_map_cfg_bus(struct pci_bus *bus,
return (pcie->base + offset);
}
static void __iomem *iproc_pcie_bus_map_cfg_bus(struct pci_bus *bus,
unsigned int devfn,
int where)
{
return iproc_pcie_map_cfg_bus(iproc_data(bus), bus->number, devfn,
where);
}
static int iproc_pci_raw_config_read32(struct iproc_pcie *pcie,
unsigned int devfn, int where,
int size, u32 *val)
{
void __iomem *addr;
addr = iproc_pcie_map_cfg_bus(pcie, 0, devfn, where & ~0x3);
if (!addr) {
*val = ~0;
return PCIBIOS_DEVICE_NOT_FOUND;
}
*val = readl(addr);
if (size <= 2)
*val = (*val >> (8 * (where & 3))) & ((1 << (size * 8)) - 1);
return PCIBIOS_SUCCESSFUL;
}
static int iproc_pci_raw_config_write32(struct iproc_pcie *pcie,
unsigned int devfn, int where,
int size, u32 val)
{
void __iomem *addr;
u32 mask, tmp;
addr = iproc_pcie_map_cfg_bus(pcie, 0, devfn, where & ~0x3);
if (!addr)
return PCIBIOS_DEVICE_NOT_FOUND;
if (size == 4) {
writel(val, addr);
return PCIBIOS_SUCCESSFUL;
}
mask = ~(((1 << (size * 8)) - 1) << ((where & 0x3) * 8));
tmp = readl(addr) & mask;
tmp |= val << ((where & 0x3) * 8);
writel(tmp, addr);
return PCIBIOS_SUCCESSFUL;
}
static int iproc_pcie_config_read32(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *val)
{
@ -524,7 +575,7 @@ static int iproc_pcie_config_write32(struct pci_bus *bus, unsigned int devfn,
}
static struct pci_ops iproc_pcie_ops = {
.map_bus = iproc_pcie_map_cfg_bus,
.map_bus = iproc_pcie_bus_map_cfg_bus,
.read = iproc_pcie_config_read32,
.write = iproc_pcie_config_write32,
};
@ -556,12 +607,11 @@ static void iproc_pcie_reset(struct iproc_pcie *pcie)
msleep(100);
}
static int iproc_pcie_check_link(struct iproc_pcie *pcie, struct pci_bus *bus)
static int iproc_pcie_check_link(struct iproc_pcie *pcie)
{
struct device *dev = pcie->dev;
u8 hdr_type;
u32 link_ctrl, class, val;
u16 pos = PCI_EXP_CAP, link_status;
u32 hdr_type, link_ctrl, link_status, class, val;
u16 pos = PCI_EXP_CAP;
bool link_is_active = false;
/*
@ -578,7 +628,7 @@ static int iproc_pcie_check_link(struct iproc_pcie *pcie, struct pci_bus *bus)
}
/* make sure we are not in EP mode */
pci_bus_read_config_byte(bus, 0, PCI_HEADER_TYPE, &hdr_type);
iproc_pci_raw_config_read32(pcie, 0, PCI_HEADER_TYPE, 1, &hdr_type);
if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE) {
dev_err(dev, "in EP mode, hdr=%#02x\n", hdr_type);
return -EFAULT;
@ -588,13 +638,16 @@ static int iproc_pcie_check_link(struct iproc_pcie *pcie, struct pci_bus *bus)
#define PCI_BRIDGE_CTRL_REG_OFFSET 0x43c
#define PCI_CLASS_BRIDGE_MASK 0xffff00
#define PCI_CLASS_BRIDGE_SHIFT 8
pci_bus_read_config_dword(bus, 0, PCI_BRIDGE_CTRL_REG_OFFSET, &class);
iproc_pci_raw_config_read32(pcie, 0, PCI_BRIDGE_CTRL_REG_OFFSET,
4, &class);
class &= ~PCI_CLASS_BRIDGE_MASK;
class |= (PCI_CLASS_BRIDGE_PCI << PCI_CLASS_BRIDGE_SHIFT);
pci_bus_write_config_dword(bus, 0, PCI_BRIDGE_CTRL_REG_OFFSET, class);
iproc_pci_raw_config_write32(pcie, 0, PCI_BRIDGE_CTRL_REG_OFFSET,
4, class);
/* check link status to see if link is active */
pci_bus_read_config_word(bus, 0, pos + PCI_EXP_LNKSTA, &link_status);
iproc_pci_raw_config_read32(pcie, 0, pos + PCI_EXP_LNKSTA,
2, &link_status);
if (link_status & PCI_EXP_LNKSTA_NLW)
link_is_active = true;
@ -603,20 +656,21 @@ static int iproc_pcie_check_link(struct iproc_pcie *pcie, struct pci_bus *bus)
#define PCI_TARGET_LINK_SPEED_MASK 0xf
#define PCI_TARGET_LINK_SPEED_GEN2 0x2
#define PCI_TARGET_LINK_SPEED_GEN1 0x1
pci_bus_read_config_dword(bus, 0,
pos + PCI_EXP_LNKCTL2,
iproc_pci_raw_config_read32(pcie, 0,
pos + PCI_EXP_LNKCTL2, 4,
&link_ctrl);
if ((link_ctrl & PCI_TARGET_LINK_SPEED_MASK) ==
PCI_TARGET_LINK_SPEED_GEN2) {
link_ctrl &= ~PCI_TARGET_LINK_SPEED_MASK;
link_ctrl |= PCI_TARGET_LINK_SPEED_GEN1;
pci_bus_write_config_dword(bus, 0,
pos + PCI_EXP_LNKCTL2,
link_ctrl);
iproc_pci_raw_config_write32(pcie, 0,
pos + PCI_EXP_LNKCTL2,
4, link_ctrl);
msleep(100);
pci_bus_read_config_word(bus, 0, pos + PCI_EXP_LNKSTA,
&link_status);
iproc_pci_raw_config_read32(pcie, 0,
pos + PCI_EXP_LNKSTA,
2, &link_status);
if (link_status & PCI_EXP_LNKSTA_NLW)
link_is_active = true;
}
@ -1205,7 +1259,8 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
struct device *dev;
int ret;
void *sysdata;
struct pci_bus *bus, *child;
struct pci_bus *child;
struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
dev = pcie->dev;
@ -1252,18 +1307,10 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
sysdata = pcie;
#endif
bus = pci_create_root_bus(dev, 0, &iproc_pcie_ops, sysdata, res);
if (!bus) {
dev_err(dev, "unable to create PCI root bus\n");
ret = -ENOMEM;
goto err_power_off_phy;
}
pcie->root_bus = bus;
ret = iproc_pcie_check_link(pcie, bus);
ret = iproc_pcie_check_link(pcie);
if (ret) {
dev_err(dev, "no PCIe EP device detected\n");
goto err_rm_root_bus;
goto err_power_off_phy;
}
iproc_pcie_enable(pcie);
@ -1272,23 +1319,31 @@ 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");
pci_scan_child_bus(bus);
pci_assign_unassigned_bus_resources(bus);
list_splice_init(res, &host->windows);
host->busnr = 0;
host->dev.parent = dev;
host->ops = &iproc_pcie_ops;
host->sysdata = sysdata;
host->map_irq = pcie->map_irq;
host->swizzle_irq = pci_common_swizzle;
if (pcie->map_irq)
pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
ret = pci_scan_root_bus_bridge(host);
if (ret < 0) {
dev_err(dev, "failed to scan host: %d\n", ret);
goto err_power_off_phy;
}
list_for_each_entry(child, &bus->children, node)
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(bus);
pci_bus_add_devices(host->bus);
return 0;
err_rm_root_bus:
pci_stop_root_bus(bus);
pci_remove_root_bus(bus);
err_power_off_phy:
phy_power_off(pcie->phy);
err_exit_phy:

554
drivers/pci/host/pcie-mediatek.c Normal file
View file

@ -0,0 +1,554 @@
/*
* MediaTek PCIe host controller driver.
*
* Copyright (c) 2017 MediaTek Inc.
* Author: Ryder Lee <ryder.lee@mediatek.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
#include <linux/of_platform.h>
#include <linux/pci.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
/* PCIe shared registers */
#define PCIE_SYS_CFG 0x00
#define PCIE_INT_ENABLE 0x0c
#define PCIE_CFG_ADDR 0x20
#define PCIE_CFG_DATA 0x24
/* PCIe per port registers */
#define PCIE_BAR0_SETUP 0x10
#define PCIE_CLASS 0x34
#define PCIE_LINK_STATUS 0x50
#define PCIE_PORT_INT_EN(x) BIT(20 + (x))
#define PCIE_PORT_PERST(x) BIT(1 + (x))
#define PCIE_PORT_LINKUP BIT(0)
#define PCIE_BAR_MAP_MAX GENMASK(31, 16)
#define PCIE_BAR_ENABLE BIT(0)
#define PCIE_REVISION_ID BIT(0)
#define PCIE_CLASS_CODE (0x60400 << 8)
#define PCIE_CONF_REG(regn) (((regn) & GENMASK(7, 2)) | \
((((regn) >> 8) & GENMASK(3, 0)) << 24))
#define PCIE_CONF_FUN(fun) (((fun) << 8) & GENMASK(10, 8))
#define PCIE_CONF_DEV(dev) (((dev) << 11) & GENMASK(15, 11))
#define PCIE_CONF_BUS(bus) (((bus) << 16) & GENMASK(23, 16))
#define PCIE_CONF_ADDR(regn, fun, dev, bus) \
(PCIE_CONF_REG(regn) | PCIE_CONF_FUN(fun) | \
PCIE_CONF_DEV(dev) | PCIE_CONF_BUS(bus))
/* MediaTek specific configuration registers */
#define PCIE_FTS_NUM 0x70c
#define PCIE_FTS_NUM_MASK GENMASK(15, 8)
#define PCIE_FTS_NUM_L0(x) ((x) & 0xff << 8)
#define PCIE_FC_CREDIT 0x73c
#define PCIE_FC_CREDIT_MASK (GENMASK(31, 31) | GENMASK(28, 16))
#define PCIE_FC_CREDIT_VAL(x) ((x) << 16)
/**
* struct mtk_pcie_port - PCIe port information
* @base: IO mapped register base
* @list: port list
* @pcie: pointer to PCIe host info
* @reset: pointer to port reset control
* @sys_ck: pointer to bus clock
* @phy: pointer to phy control block
* @lane: lane count
* @index: port index
*/
struct mtk_pcie_port {
void __iomem *base;
struct list_head list;
struct mtk_pcie *pcie;
struct reset_control *reset;
struct clk *sys_ck;
struct phy *phy;
u32 lane;
u32 index;
};
/**
* struct mtk_pcie - PCIe host information
* @dev: pointer to PCIe device
* @base: IO mapped register base
* @free_ck: free-run reference clock
* @io: IO resource
* @pio: PIO resource
* @mem: non-prefetchable memory resource
* @busn: bus range
* @offset: IO / Memory offset
* @ports: pointer to PCIe port information
*/
struct mtk_pcie {
struct device *dev;
void __iomem *base;
struct clk *free_ck;
struct resource io;
struct resource pio;
struct resource mem;
struct resource busn;
struct {
resource_size_t mem;
resource_size_t io;
} offset;
struct list_head ports;
};
static inline bool mtk_pcie_link_up(struct mtk_pcie_port *port)
{
return !!(readl(port->base + PCIE_LINK_STATUS) & PCIE_PORT_LINKUP);
}
static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie)
{
struct device *dev = pcie->dev;
clk_disable_unprepare(pcie->free_ck);
if (dev->pm_domain) {
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);
}
}
static void mtk_pcie_port_free(struct mtk_pcie_port *port)
{
struct mtk_pcie *pcie = port->pcie;
struct device *dev = pcie->dev;
devm_iounmap(dev, port->base);
list_del(&port->list);
devm_kfree(dev, port);
}
static void mtk_pcie_put_resources(struct mtk_pcie *pcie)
{
struct mtk_pcie_port *port, *tmp;
list_for_each_entry_safe(port, tmp, &pcie->ports, list) {
phy_power_off(port->phy);
clk_disable_unprepare(port->sys_ck);
mtk_pcie_port_free(port);
}
mtk_pcie_subsys_powerdown(pcie);
}
static void __iomem *mtk_pcie_map_bus(struct pci_bus *bus,
unsigned int devfn, int where)
{
struct pci_host_bridge *host = pci_find_host_bridge(bus);
struct mtk_pcie *pcie = pci_host_bridge_priv(host);
writel(PCIE_CONF_ADDR(where, PCI_FUNC(devfn), PCI_SLOT(devfn),
bus->number), pcie->base + PCIE_CFG_ADDR);
return pcie->base + PCIE_CFG_DATA + (where & 3);
}
static struct pci_ops mtk_pcie_ops = {
.map_bus = mtk_pcie_map_bus,
.read = pci_generic_config_read,
.write = pci_generic_config_write,
};
static void mtk_pcie_configure_rc(struct mtk_pcie_port *port)
{
struct mtk_pcie *pcie = port->pcie;
u32 func = PCI_FUNC(port->index << 3);
u32 slot = PCI_SLOT(port->index << 3);
u32 val;
/* enable interrupt */
val = readl(pcie->base + PCIE_INT_ENABLE);
val |= PCIE_PORT_INT_EN(port->index);
writel(val, pcie->base + PCIE_INT_ENABLE);
/* map to all DDR region. We need to set it before cfg operation. */
writel(PCIE_BAR_MAP_MAX | PCIE_BAR_ENABLE,
port->base + PCIE_BAR0_SETUP);
/* configure class code and revision ID */
writel(PCIE_CLASS_CODE | PCIE_REVISION_ID, port->base + PCIE_CLASS);
/* configure FC credit */
writel(PCIE_CONF_ADDR(PCIE_FC_CREDIT, func, slot, 0),
pcie->base + PCIE_CFG_ADDR);
val = readl(pcie->base + PCIE_CFG_DATA);
val &= ~PCIE_FC_CREDIT_MASK;
val |= PCIE_FC_CREDIT_VAL(0x806c);
writel(PCIE_CONF_ADDR(PCIE_FC_CREDIT, func, slot, 0),
pcie->base + PCIE_CFG_ADDR);
writel(val, pcie->base + PCIE_CFG_DATA);
/* configure RC FTS number to 250 when it leaves L0s */
writel(PCIE_CONF_ADDR(PCIE_FTS_NUM, func, slot, 0),
pcie->base + PCIE_CFG_ADDR);
val = readl(pcie->base + PCIE_CFG_DATA);
val &= ~PCIE_FTS_NUM_MASK;
val |= PCIE_FTS_NUM_L0(0x50);
writel(PCIE_CONF_ADDR(PCIE_FTS_NUM, func, slot, 0),
pcie->base + PCIE_CFG_ADDR);
writel(val, pcie->base + PCIE_CFG_DATA);
}
static void mtk_pcie_assert_ports(struct mtk_pcie_port *port)
{
struct mtk_pcie *pcie = port->pcie;
u32 val;
/* assert port PERST_N */
val = readl(pcie->base + PCIE_SYS_CFG);
val |= PCIE_PORT_PERST(port->index);
writel(val, pcie->base + PCIE_SYS_CFG);
/* de-assert port PERST_N */
val = readl(pcie->base + PCIE_SYS_CFG);
val &= ~PCIE_PORT_PERST(port->index);
writel(val, pcie->base + PCIE_SYS_CFG);
/* PCIe v2.0 need at least 100ms delay to train from Gen1 to Gen2 */
msleep(100);
}
static void mtk_pcie_enable_ports(struct mtk_pcie_port *port)
{
struct device *dev = port->pcie->dev;
int err;
err = clk_prepare_enable(port->sys_ck);
if (err) {
dev_err(dev, "failed to enable port%d clock\n", port->index);
goto err_sys_clk;
}
reset_control_assert(port->reset);
reset_control_deassert(port->reset);
err = phy_power_on(port->phy);
if (err) {
dev_err(dev, "failed to power on port%d phy\n", port->index);
goto err_phy_on;
}
mtk_pcie_assert_ports(port);
/* if link up, then setup root port configuration space */
if (mtk_pcie_link_up(port)) {
mtk_pcie_configure_rc(port);
return;
}
dev_info(dev, "Port%d link down\n", port->index);
phy_power_off(port->phy);
err_phy_on:
clk_disable_unprepare(port->sys_ck);
err_sys_clk:
mtk_pcie_port_free(port);
}
static int mtk_pcie_parse_ports(struct mtk_pcie *pcie,
struct device_node *node,
int index)
{
struct mtk_pcie_port *port;
struct resource *regs;
struct device *dev = pcie->dev;
struct platform_device *pdev = to_platform_device(dev);
char name[10];
int err;
port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
if (!port)
return -ENOMEM;
err = of_property_read_u32(node, "num-lanes", &port->lane);
if (err) {
dev_err(dev, "missing num-lanes property\n");
return err;
}
regs = platform_get_resource(pdev, IORESOURCE_MEM, index + 1);
port->base = devm_ioremap_resource(dev, regs);
if (IS_ERR(port->base)) {
dev_err(dev, "failed to map port%d base\n", index);
return PTR_ERR(port->base);
}
snprintf(name, sizeof(name), "sys_ck%d", index);
port->sys_ck = devm_clk_get(dev, name);
if (IS_ERR(port->sys_ck)) {
dev_err(dev, "failed to get port%d clock\n", index);
return PTR_ERR(port->sys_ck);
}
snprintf(name, sizeof(name), "pcie-rst%d", index);
port->reset = devm_reset_control_get_optional(dev, name);
if (PTR_ERR(port->reset) == -EPROBE_DEFER)
return PTR_ERR(port->reset);
/* some platforms may use default PHY setting */
snprintf(name, sizeof(name), "pcie-phy%d", index);
port->phy = devm_phy_optional_get(dev, name);
if (IS_ERR(port->phy))
return PTR_ERR(port->phy);
port->index = index;
port->pcie = pcie;
INIT_LIST_HEAD(&port->list);
list_add_tail(&port->list, &pcie->ports);
return 0;
}
static int mtk_pcie_subsys_powerup(struct mtk_pcie *pcie)
{
struct device *dev = pcie->dev;
struct platform_device *pdev = to_platform_device(dev);
struct resource *regs;
int err;
/* get shared registers */
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pcie->base = devm_ioremap_resource(dev, regs);
if (IS_ERR(pcie->base)) {
dev_err(dev, "failed to map shared register\n");
return PTR_ERR(pcie->base);
}
pcie->free_ck = devm_clk_get(dev, "free_ck");
if (IS_ERR(pcie->free_ck)) {
if (PTR_ERR(pcie->free_ck) == -EPROBE_DEFER)
return -EPROBE_DEFER;
pcie->free_ck = NULL;
}
if (dev->pm_domain) {
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
}
/* enable top level clock */
err = clk_prepare_enable(pcie->free_ck);
if (err) {
dev_err(dev, "failed to enable free_ck\n");
goto err_free_ck;
}
return 0;
err_free_ck:
if (dev->pm_domain) {
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);
}
return err;
}
static int mtk_pcie_setup(struct mtk_pcie *pcie)
{
struct device *dev = pcie->dev;
struct device_node *node = dev->of_node, *child;
struct of_pci_range_parser parser;
struct of_pci_range range;
struct resource res;
struct mtk_pcie_port *port, *tmp;
int err;
if (of_pci_range_parser_init(&parser, node)) {
dev_err(dev, "missing \"ranges\" property\n");
return -EINVAL;
}
for_each_of_pci_range(&parser, &range) {
err = of_pci_range_to_resource(&range, node, &res);
if (err < 0)
return err;
switch (res.flags & IORESOURCE_TYPE_BITS) {
case IORESOURCE_IO:
pcie->offset.io = res.start - range.pci_addr;
memcpy(&pcie->pio, &res, sizeof(res));
pcie->pio.name = node->full_name;
pcie->io.start = range.cpu_addr;
pcie->io.end = range.cpu_addr + range.size - 1;
pcie->io.flags = IORESOURCE_MEM;
pcie->io.name = "I/O";
memcpy(&res, &pcie->io, sizeof(res));
break;
case IORESOURCE_MEM:
pcie->offset.mem = res.start - range.pci_addr;
memcpy(&pcie->mem, &res, sizeof(res));
pcie->mem.name = "non-prefetchable";
break;
}
}
err = of_pci_parse_bus_range(node, &pcie->busn);
if (err < 0) {
dev_err(dev, "failed to parse bus ranges property: %d\n", err);
pcie->busn.name = node->name;
pcie->busn.start = 0;
pcie->busn.end = 0xff;
pcie->busn.flags = IORESOURCE_BUS;
}
for_each_available_child_of_node(node, child) {
int index;
err = of_pci_get_devfn(child);
if (err < 0) {
dev_err(dev, "failed to parse devfn: %d\n", err);
return err;
}
index = PCI_SLOT(err);
err = mtk_pcie_parse_ports(pcie, child, index);
if (err)
return err;
}
err = mtk_pcie_subsys_powerup(pcie);
if (err)
return err;
/* enable each port, and then check link status */
list_for_each_entry_safe(port, tmp, &pcie->ports, list)
mtk_pcie_enable_ports(port);
/* power down PCIe subsys if slots are all empty (link down) */
if (list_empty(&pcie->ports))
mtk_pcie_subsys_powerdown(pcie);
return 0;
}
static int mtk_pcie_request_resources(struct mtk_pcie *pcie)
{
struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
struct list_head *windows = &host->windows;
struct device *dev = pcie->dev;
int err;
pci_add_resource_offset(windows, &pcie->pio, pcie->offset.io);
pci_add_resource_offset(windows, &pcie->mem, pcie->offset.mem);
pci_add_resource(windows, &pcie->busn);
err = devm_request_pci_bus_resources(dev, windows);
if (err < 0)
return err;
pci_remap_iospace(&pcie->pio, pcie->io.start);
return 0;
}
static int mtk_pcie_register_host(struct pci_host_bridge *host)
{
struct mtk_pcie *pcie = pci_host_bridge_priv(host);
struct pci_bus *child;
int err;
host->busnr = pcie->busn.start;
host->dev.parent = pcie->dev;
host->ops = &mtk_pcie_ops;
host->map_irq = of_irq_parse_and_map_pci;
host->swizzle_irq = pci_common_swizzle;
err = pci_scan_root_bus_bridge(host);
if (err < 0)
return err;
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);
return 0;
}
static int mtk_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mtk_pcie *pcie;
struct pci_host_bridge *host;
int err;
host = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
if (!host)
return -ENOMEM;
pcie = pci_host_bridge_priv(host);
pcie->dev = dev;
platform_set_drvdata(pdev, pcie);
INIT_LIST_HEAD(&pcie->ports);
err = mtk_pcie_setup(pcie);
if (err)
return err;
err = mtk_pcie_request_resources(pcie);
if (err)
goto put_resources;
err = mtk_pcie_register_host(host);
if (err)
goto put_resources;
return 0;
put_resources:
if (!list_empty(&pcie->ports))
mtk_pcie_put_resources(pcie);
return err;
}
static const struct of_device_id mtk_pcie_ids[] = {
{ .compatible = "mediatek,mt7623-pcie"},
{ .compatible = "mediatek,mt2701-pcie"},
{},
};
static struct platform_driver mtk_pcie_driver = {
.probe = mtk_pcie_probe,
.driver = {
.name = "mtk-pcie",
.of_match_table = mtk_pcie_ids,
.suppress_bind_attrs = true,
},
};
builtin_platform_driver(mtk_pcie_driver);

40
drivers/pci/host/pcie-rcar.c
View file

@ -450,29 +450,33 @@ static void rcar_pcie_force_speedup(struct rcar_pcie *pcie)
static int rcar_pcie_enable(struct rcar_pcie *pcie)
{
struct device *dev = pcie->dev;
struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
struct pci_bus *bus, *child;
LIST_HEAD(res);
int ret;
/* Try setting 5 GT/s link speed */
rcar_pcie_force_speedup(pcie);
rcar_pcie_setup(&res, pcie);
rcar_pcie_setup(&bridge->windows, pcie);
pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS);
bridge->dev.parent = dev;
bridge->sysdata = pcie;
bridge->busnr = pcie->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))
bus = pci_scan_root_bus_msi(dev, pcie->root_bus_nr,
&rcar_pcie_ops, pcie, &res, &pcie->msi.chip);
else
bus = pci_scan_root_bus(dev, pcie->root_bus_nr,
&rcar_pcie_ops, pcie, &res);
bridge->msi = &pcie->msi.chip;
if (!bus) {
dev_err(dev, "Scanning rootbus failed");
return -ENODEV;
ret = pci_scan_root_bus_bridge(bridge);
if (ret < 0) {
kfree(bridge);
return ret;
}
pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
bus = bridge->bus;
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
@ -1127,11 +1131,14 @@ static int rcar_pcie_probe(struct platform_device *pdev)
unsigned int data;
int err;
int (*hw_init_fn)(struct rcar_pcie *);
struct pci_host_bridge *bridge;
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
bridge = pci_alloc_host_bridge(sizeof(*pcie));
if (!bridge)
return -ENOMEM;
pcie = pci_host_bridge_priv(bridge);
pcie->dev = dev;
INIT_LIST_HEAD(&pcie->resources);
@ -1141,12 +1148,12 @@ static int rcar_pcie_probe(struct platform_device *pdev)
err = rcar_pcie_get_resources(pcie);
if (err < 0) {
dev_err(dev, "failed to request resources: %d\n", err);
return err;
goto err_free_bridge;
}
err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node);
if (err)
return err;
goto err_free_bridge;
pm_runtime_enable(dev);
err = pm_runtime_get_sync(dev);
@ -1183,6 +1190,9 @@ static int rcar_pcie_probe(struct platform_device *pdev)
return 0;
err_free_bridge:
pci_free_host_bridge(bridge);
err_pm_put:
pm_runtime_put(dev);

147
drivers/pci/host/pcie-rockchip.c
View file

@ -139,6 +139,7 @@
PCIE_CORE_INT_CT | PCIE_CORE_INT_UTC | \
PCIE_CORE_INT_MMVC)
#define PCIE_RC_CONFIG_NORMAL_BASE 0x800000
#define PCIE_RC_CONFIG_BASE 0xa00000
#define PCIE_RC_CONFIG_RID_CCR (PCIE_RC_CONFIG_BASE + 0x08)
#define PCIE_RC_CONFIG_SCC_SHIFT 16
@ -146,6 +147,9 @@
#define PCIE_RC_CONFIG_DCR_CSPL_SHIFT 18
#define PCIE_RC_CONFIG_DCR_CSPL_LIMIT 0xff
#define PCIE_RC_CONFIG_DCR_CPLS_SHIFT 26
#define PCIE_RC_CONFIG_DCSR (PCIE_RC_CONFIG_BASE + 0xc8)
#define PCIE_RC_CONFIG_DCSR_MPS_MASK GENMASK(7, 5)
#define PCIE_RC_CONFIG_DCSR_MPS_256 (0x1 << 5)
#define PCIE_RC_CONFIG_LINK_CAP (PCIE_RC_CONFIG_BASE + 0xcc)
#define PCIE_RC_CONFIG_LINK_CAP_L0S BIT(10)
#define PCIE_RC_CONFIG_LCS (PCIE_RC_CONFIG_BASE + 0xd0)
@ -175,6 +179,8 @@
#define IB_ROOT_PORT_REG_SIZE_SHIFT 3
#define AXI_WRAPPER_IO_WRITE 0x6
#define AXI_WRAPPER_MEM_WRITE 0x2
#define AXI_WRAPPER_TYPE0_CFG 0xa
#define AXI_WRAPPER_TYPE1_CFG 0xb
#define AXI_WRAPPER_NOR_MSG 0xc
#define MAX_AXI_IB_ROOTPORT_REGION_NUM 3
@ -198,6 +204,7 @@
#define RC_REGION_0_ADDR_TRANS_H 0x00000000
#define RC_REGION_0_ADDR_TRANS_L 0x00000000
#define RC_REGION_0_PASS_BITS (25 - 1)
#define RC_REGION_0_TYPE_MASK GENMASK(3, 0)
#define MAX_AXI_WRAPPER_REGION_NUM 33
struct rockchip_pcie {
@ -295,7 +302,9 @@ static int rockchip_pcie_valid_device(struct rockchip_pcie *rockchip,
static int rockchip_pcie_rd_own_conf(struct rockchip_pcie *rockchip,
int where, int size, u32 *val)
{
void __iomem *addr = rockchip->apb_base + PCIE_RC_CONFIG_BASE + where;
void __iomem *addr;
addr = rockchip->apb_base + PCIE_RC_CONFIG_NORMAL_BASE + where;
if (!IS_ALIGNED((uintptr_t)addr, size)) {
*val = 0;
@ -319,11 +328,13 @@ static int rockchip_pcie_wr_own_conf(struct rockchip_pcie *rockchip,
int where, int size, u32 val)
{
u32 mask, tmp, offset;
void __iomem *addr;
offset = where & ~0x3;
addr = rockchip->apb_base + PCIE_RC_CONFIG_NORMAL_BASE + offset;
if (size == 4) {
writel(val, rockchip->apb_base + PCIE_RC_CONFIG_BASE + offset);
writel(val, addr);
return PCIBIOS_SUCCESSFUL;
}
@ -334,13 +345,33 @@ static int rockchip_pcie_wr_own_conf(struct rockchip_pcie *rockchip,
* corrupt RW1C bits in adjacent registers. But the hardware
* doesn't support smaller writes.
*/
tmp = readl(rockchip->apb_base + PCIE_RC_CONFIG_BASE + offset) & mask;
tmp = readl(addr) & mask;
tmp |= val << ((where & 0x3) * 8);
writel(tmp, rockchip->apb_base + PCIE_RC_CONFIG_BASE + offset);
writel(tmp, addr);
return PCIBIOS_SUCCESSFUL;
}
static void rockchip_pcie_cfg_configuration_accesses(
struct rockchip_pcie *rockchip, u32 type)
{
u32 ob_desc_0;
/* Configuration Accesses for region 0 */
rockchip_pcie_write(rockchip, 0x0, PCIE_RC_BAR_CONF);
rockchip_pcie_write(rockchip,
(RC_REGION_0_ADDR_TRANS_L + RC_REGION_0_PASS_BITS),
PCIE_CORE_OB_REGION_ADDR0);
rockchip_pcie_write(rockchip, RC_REGION_0_ADDR_TRANS_H,
PCIE_CORE_OB_REGION_ADDR1);
ob_desc_0 = rockchip_pcie_read(rockchip, PCIE_CORE_OB_REGION_DESC0);
ob_desc_0 &= ~(RC_REGION_0_TYPE_MASK);
ob_desc_0 |= (type | (0x1 << 23));
rockchip_pcie_write(rockchip, ob_desc_0, PCIE_CORE_OB_REGION_DESC0);
rockchip_pcie_write(rockchip, 0x0, PCIE_CORE_OB_REGION_DESC1);
}
static int rockchip_pcie_rd_other_conf(struct rockchip_pcie *rockchip,
struct pci_bus *bus, u32 devfn,
int where, int size, u32 *val)
@ -355,6 +386,13 @@ static int rockchip_pcie_rd_other_conf(struct rockchip_pcie *rockchip,
return PCIBIOS_BAD_REGISTER_NUMBER;
}
if (bus->parent->number == rockchip->root_bus_nr)
rockchip_pcie_cfg_configuration_accesses(rockchip,
AXI_WRAPPER_TYPE0_CFG);
else
rockchip_pcie_cfg_configuration_accesses(rockchip,
AXI_WRAPPER_TYPE1_CFG);
if (size == 4) {
*val = readl(rockchip->reg_base + busdev);
} else if (size == 2) {
@ -379,6 +417,13 @@ 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)
rockchip_pcie_cfg_configuration_accesses(rockchip,
AXI_WRAPPER_TYPE0_CFG);
else
rockchip_pcie_cfg_configuration_accesses(rockchip,
AXI_WRAPPER_TYPE1_CFG);
if (size == 4)
writel(val, rockchip->reg_base + busdev);
else if (size == 2)
@ -664,15 +709,10 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LINK_CAP);
}
rockchip_pcie_write(rockchip, 0x0, PCIE_RC_BAR_CONF);
rockchip_pcie_write(rockchip,
(RC_REGION_0_ADDR_TRANS_L + RC_REGION_0_PASS_BITS),
PCIE_CORE_OB_REGION_ADDR0);
rockchip_pcie_write(rockchip, RC_REGION_0_ADDR_TRANS_H,
PCIE_CORE_OB_REGION_ADDR1);
rockchip_pcie_write(rockchip, 0x0080000a, PCIE_CORE_OB_REGION_DESC0);
rockchip_pcie_write(rockchip, 0x0, PCIE_CORE_OB_REGION_DESC1);
status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_DCSR);
status &= ~PCIE_RC_CONFIG_DCSR_MPS_MASK;
status |= PCIE_RC_CONFIG_DCSR_MPS_256;
rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCSR);
return 0;
}
@ -1156,13 +1196,16 @@ static int rockchip_pcie_prog_ib_atu(struct rockchip_pcie *rockchip,
return 0;
}
static int rockchip_cfg_atu(struct rockchip_pcie *rockchip)
static int rockchip_pcie_cfg_atu(struct rockchip_pcie *rockchip)
{
struct device *dev = rockchip->dev;
int offset;
int err;
int reg_no;
rockchip_pcie_cfg_configuration_accesses(rockchip,
AXI_WRAPPER_TYPE0_CFG);
for (reg_no = 0; reg_no < (rockchip->mem_size >> 20); reg_no++) {
err = rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1,
AXI_WRAPPER_MEM_WRITE,
@ -1251,6 +1294,9 @@ static int __maybe_unused rockchip_pcie_suspend_noirq(struct device *dev)
clk_disable_unprepare(rockchip->aclk_perf_pcie);
clk_disable_unprepare(rockchip->aclk_pcie);
if (!IS_ERR(rockchip->vpcie0v9))
regulator_disable(rockchip->vpcie0v9);
return ret;
}
@ -1259,24 +1305,54 @@ static int __maybe_unused rockchip_pcie_resume_noirq(struct device *dev)
struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
int err;
clk_prepare_enable(rockchip->clk_pcie_pm);
clk_prepare_enable(rockchip->hclk_pcie);
clk_prepare_enable(rockchip->aclk_perf_pcie);
clk_prepare_enable(rockchip->aclk_pcie);
if (!IS_ERR(rockchip->vpcie0v9)) {
err = regulator_enable(rockchip->vpcie0v9);
if (err) {
dev_err(dev, "fail to enable vpcie0v9 regulator\n");
return err;
}
}
err = clk_prepare_enable(rockchip->clk_pcie_pm);
if (err)
goto err_pcie_pm;
err = clk_prepare_enable(rockchip->hclk_pcie);
if (err)
goto err_hclk_pcie;
err = clk_prepare_enable(rockchip->aclk_perf_pcie);
if (err)
goto err_aclk_perf_pcie;
err = clk_prepare_enable(rockchip->aclk_pcie);
if (err)
goto err_aclk_pcie;
err = rockchip_pcie_init_port(rockchip);
if (err)
return err;
goto err_pcie_resume;
err = rockchip_cfg_atu(rockchip);
err = rockchip_pcie_cfg_atu(rockchip);
if (err)
return err;
goto err_pcie_resume;
/* Need this to enter L1 again */
rockchip_pcie_update_txcredit_mui(rockchip);
rockchip_pcie_enable_interrupts(rockchip);
return 0;
err_pcie_resume:
clk_disable_unprepare(rockchip->aclk_pcie);
err_aclk_pcie:
clk_disable_unprepare(rockchip->aclk_perf_pcie);
err_aclk_perf_pcie:
clk_disable_unprepare(rockchip->hclk_pcie);
err_hclk_pcie:
clk_disable_unprepare(rockchip->clk_pcie_pm);
err_pcie_pm:
return err;
}
static int rockchip_pcie_probe(struct platform_device *pdev)
@ -1284,6 +1360,7 @@ 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_entry *win;
resource_size_t io_base;
struct resource *mem;
@ -1295,10 +1372,12 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
if (!dev->of_node)
return -ENODEV;
rockchip = devm_kzalloc(dev, sizeof(*rockchip), GFP_KERNEL);
if (!rockchip)
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*rockchip));
if (!bridge)
return -ENOMEM;
rockchip = pci_host_bridge_priv(bridge);
platform_set_drvdata(pdev, rockchip);
rockchip->dev = dev;
@ -1385,22 +1464,30 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
}
}
err = rockchip_cfg_atu(rockchip);
err = rockchip_pcie_cfg_atu(rockchip);
if (err)
goto err_free_res;
rockchip->msg_region = devm_ioremap(rockchip->dev,
rockchip->msg_bus_addr, SZ_1M);
rockchip->msg_region = devm_ioremap(dev, rockchip->msg_bus_addr, SZ_1M);
if (!rockchip->msg_region) {
err = -ENOMEM;
goto err_free_res;
}
bus = pci_scan_root_bus(&pdev->dev, 0, &rockchip_pcie_ops, rockchip, &res);
if (!bus) {
err = -ENOMEM;
list_splice_init(&res, &bridge->windows);
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);
if (!err)
goto err_free_res;
}
bus = bridge->bus;
rockchip->root_bus = bus;
pci_bus_size_bridges(bus);

141
drivers/pci/host/pcie-tango.c Normal file
View file

@ -0,0 +1,141 @@
#include <linux/pci-ecam.h>
#include <linux/delay.h>
#include <linux/of.h>
#define SMP8759_MUX 0x48
#define SMP8759_TEST_OUT 0x74
struct tango_pcie {
void __iomem *base;
};
static int smp8759_config_read(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *val)
{
struct pci_config_window *cfg = bus->sysdata;
struct tango_pcie *pcie = dev_get_drvdata(cfg->parent);
int ret;
/* Reads in configuration space outside devfn 0 return garbage */
if (devfn != 0)
return PCIBIOS_FUNC_NOT_SUPPORTED;
/*
* PCI config and MMIO accesses are muxed. Linux doesn't have a
* mutual exclusion mechanism for config vs. MMIO accesses, so
* concurrent accesses may cause corruption.
*/
writel_relaxed(1, pcie->base + SMP8759_MUX);
ret = pci_generic_config_read(bus, devfn, where, size, val);
writel_relaxed(0, pcie->base + SMP8759_MUX);
return ret;
}
static int smp8759_config_write(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 val)
{
struct pci_config_window *cfg = bus->sysdata;
struct tango_pcie *pcie = dev_get_drvdata(cfg->parent);
int ret;
writel_relaxed(1, pcie->base + SMP8759_MUX);
ret = pci_generic_config_write(bus, devfn, where, size, val);
writel_relaxed(0, pcie->base + SMP8759_MUX);
return ret;
}
static struct pci_ecam_ops smp8759_ecam_ops = {
.bus_shift = 20,
.pci_ops = {
.map_bus = pci_ecam_map_bus,
.read = smp8759_config_read,
.write = smp8759_config_write,
}
};
static int tango_pcie_link_up(struct tango_pcie *pcie)
{
void __iomem *test_out = pcie->base + SMP8759_TEST_OUT;
int i;
writel_relaxed(16, test_out);
for (i = 0; i < 10; ++i) {
u32 ltssm_state = readl_relaxed(test_out) >> 8;
if ((ltssm_state & 0x1f) == 0xf) /* L0 */
return 1;
usleep_range(3000, 4000);
}
return 0;
}
static int tango_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct tango_pcie *pcie;
struct resource *res;
int ret;
dev_warn(dev, "simultaneous PCI config and MMIO accesses may cause data corruption\n");
add_taint(TAINT_CRAP, LOCKDEP_STILL_OK);
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
pcie->base = devm_ioremap_resource(dev, res);
if (IS_ERR(pcie->base))
return PTR_ERR(pcie->base);
platform_set_drvdata(pdev, pcie);
if (!tango_pcie_link_up(pcie))
return -ENODEV;
return pci_host_common_probe(pdev, &smp8759_ecam_ops);
}
static const struct of_device_id tango_pcie_ids[] = {
{ .compatible = "sigma,smp8759-pcie" },
{ },
};
static struct platform_driver tango_pcie_driver = {
.probe = tango_pcie_probe,
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = tango_pcie_ids,
.suppress_bind_attrs = true,
},
};
builtin_platform_driver(tango_pcie_driver);
/*
* The root complex advertises the wrong device class.
* Header Type 1 is for PCI-to-PCI bridges.
*/
static void tango_fixup_class(struct pci_dev *dev)
{
dev->class = PCI_CLASS_BRIDGE_PCI << 8;
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SIGMA, 0x0024, tango_fixup_class);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SIGMA, 0x0028, tango_fixup_class);
/*
* The root complex exposes a "fake" BAR, which is used to filter
* bus-to-system accesses. Only accesses within the range defined by this
* BAR are forwarded to the host, others are ignored.
*
* By default, the DMA framework expects an identity mapping, and DRAM0 is
* mapped at 0x80000000.
*/
static void tango_fixup_bar(struct pci_dev *dev)
{
dev->non_compliant_bars = true;
pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, 0x80000000);
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SIGMA, 0x0024, tango_fixup_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SIGMA, 0x0028, tango_fixup_bar);

79
drivers/pci/host/pcie-xilinx-nwl.c
View file

@ -172,6 +172,7 @@ struct nwl_pcie {
u8 root_busno;
struct nwl_msi msi;
struct irq_domain *legacy_irq_domain;
raw_spinlock_t leg_mask_lock;
};
static inline u32 nwl_bridge_readl(struct nwl_pcie *pcie, u32 off)
@ -383,11 +384,52 @@ static void nwl_pcie_msi_handler_low(struct irq_desc *desc)
chained_irq_exit(chip, desc);
}
static void nwl_mask_leg_irq(struct irq_data *data)
{
struct irq_desc *desc = irq_to_desc(data->irq);
struct nwl_pcie *pcie;
unsigned long flags;
u32 mask;
u32 val;
pcie = irq_desc_get_chip_data(desc);
mask = 1 << (data->hwirq - 1);
raw_spin_lock_irqsave(&pcie->leg_mask_lock, flags);
val = nwl_bridge_readl(pcie, MSGF_LEG_MASK);
nwl_bridge_writel(pcie, (val & (~mask)), MSGF_LEG_MASK);
raw_spin_unlock_irqrestore(&pcie->leg_mask_lock, flags);
}
static void nwl_unmask_leg_irq(struct irq_data *data)
{
struct irq_desc *desc = irq_to_desc(data->irq);
struct nwl_pcie *pcie;
unsigned long flags;
u32 mask;
u32 val;
pcie = irq_desc_get_chip_data(desc);
mask = 1 << (data->hwirq - 1);
raw_spin_lock_irqsave(&pcie->leg_mask_lock, flags);
val = nwl_bridge_readl(pcie, MSGF_LEG_MASK);
nwl_bridge_writel(pcie, (val | mask), MSGF_LEG_MASK);
raw_spin_unlock_irqrestore(&pcie->leg_mask_lock, flags);
}
static struct irq_chip nwl_leg_irq_chip = {
.name = "nwl_pcie:legacy",
.irq_enable = nwl_unmask_leg_irq,
.irq_disable = nwl_mask_leg_irq,
.irq_mask = nwl_mask_leg_irq,
.irq_unmask = nwl_unmask_leg_irq,
};
static int nwl_legacy_map(struct irq_domain *domain, unsigned int irq,
irq_hw_number_t hwirq)
{
irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
irq_set_chip_and_handler(irq, &nwl_leg_irq_chip, handle_level_irq);
irq_set_chip_data(irq, domain->host_data);
irq_set_status_flags(irq, IRQ_LEVEL);
return 0;
}
@ -526,11 +568,12 @@ static int nwl_pcie_init_irq_domain(struct nwl_pcie *pcie)
return -ENOMEM;
}
raw_spin_lock_init(&pcie->leg_mask_lock);
nwl_pcie_init_msi_irq_domain(pcie);
return 0;
}
static int nwl_pcie_enable_msi(struct nwl_pcie *pcie, struct pci_bus *bus)
static int nwl_pcie_enable_msi(struct nwl_pcie *pcie)
{
struct device *dev = pcie->dev;
struct platform_device *pdev = to_platform_device(dev);
@ -791,13 +834,16 @@ static int nwl_pcie_probe(struct platform_device *pdev)
struct nwl_pcie *pcie;
struct pci_bus *bus;
struct pci_bus *child;
struct pci_host_bridge *bridge;
int err;
resource_size_t iobase = 0;
LIST_HEAD(res);
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
return -ENOMEM;
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
if (!bridge)
return -ENODEV;
pcie = pci_host_bridge_priv(bridge);
pcie->dev = dev;
pcie->ecam_value = NWL_ECAM_VALUE_DEFAULT;
@ -830,21 +876,28 @@ static int nwl_pcie_probe(struct platform_device *pdev)
goto error;
}
bus = pci_create_root_bus(dev, pcie->root_busno,
&nwl_pcie_ops, pcie, &res);
if (!bus) {
err = -ENOMEM;
goto error;
}
list_splice_init(&res, &bridge->windows);
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, bus);
err = nwl_pcie_enable_msi(pcie);
if (err < 0) {
dev_err(dev, "failed to enable MSI support: %d\n", err);
goto error;
}
}
pci_scan_child_bus(bus);
err = pci_scan_root_bus_bridge(bridge);
if (err)
goto error;
bus = bridge->bus;
pci_assign_unassigned_bus_resources(bus);
list_for_each_entry(child, &bus->children, node)
pcie_bus_configure_settings(child);

36
drivers/pci/host/pcie-xilinx.c
View file

@ -633,6 +633,7 @@ 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;
resource_size_t iobase = 0;
LIST_HEAD(res);
@ -640,9 +641,11 @@ static int xilinx_pcie_probe(struct platform_device *pdev)
if (!dev->of_node)
return -ENODEV;
port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
if (!port)
return -ENOMEM;
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*port));
if (!bridge)
return -ENODEV;
port = pci_host_bridge_priv(bridge);
port->dev = dev;
@ -671,21 +674,26 @@ static int xilinx_pcie_probe(struct platform_device *pdev)
if (err)
goto error;
bus = pci_create_root_bus(dev, 0, &xilinx_pcie_ops, port, &res);
if (!bus) {
err = -ENOMEM;
goto error;
}
list_splice_init(&res, &bridge->windows);
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;
bus->msi = &xilinx_pcie_msi_chip;
bridge->msi = &xilinx_pcie_msi_chip;
#endif
pci_scan_child_bus(bus);
err = pci_scan_root_bus_bridge(bridge);
if (err < 0)
goto error;
bus = bridge->bus;
pci_assign_unassigned_bus_resources(bus);
#ifndef CONFIG_MICROBLAZE
pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
#endif
list_for_each_entry(child, &bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(bus);
@ -696,7 +704,7 @@ static int xilinx_pcie_probe(struct platform_device *pdev)
return err;
}
static struct of_device_id xilinx_pcie_of_match[] = {
static const struct of_device_id xilinx_pcie_of_match[] = {
{ .compatible = "xlnx,axi-pcie-host-1.00.a", },
{}
};

10
drivers/pci/host/vmd.c
View file

@ -539,7 +539,10 @@ static void vmd_detach_resources(struct vmd_dev *vmd)
}
/*
* VMD domains start at 0x1000 to not clash with ACPI _SEG domains.
* VMD domains start at 0x10000 to not clash with ACPI _SEG domains.
* Per ACPI r6.0, sec 6.5.6, _SEG returns an integer, of which the lower
* 16 bits are the PCI Segment Group (domain) number. Other bits are
* currently reserved.
*/
static int vmd_find_free_domain(void)
{
@ -710,7 +713,8 @@ static int vmd_probe(struct pci_dev *dev, const struct pci_device_id *id)
INIT_LIST_HEAD(&vmd->irqs[i].irq_list);
err = devm_request_irq(&dev->dev, pci_irq_vector(dev, i),
vmd_irq, 0, "vmd", &vmd->irqs[i]);
vmd_irq, IRQF_NO_THREAD,
"vmd", &vmd->irqs[i]);
if (err)
return err;
}
@ -739,10 +743,10 @@ static void vmd_remove(struct pci_dev *dev)
struct vmd_dev *vmd = pci_get_drvdata(dev);
vmd_detach_resources(vmd);
vmd_cleanup_srcu(vmd);
sysfs_remove_link(&vmd->dev->dev.kobj, "domain");
pci_stop_root_bus(vmd->bus);
pci_remove_root_bus(vmd->bus);
vmd_cleanup_srcu(vmd);
vmd_teardown_dma_ops(vmd);
irq_domain_remove(vmd->irq_domain);
}

4
drivers/pci/iov.c
View file

@ -461,8 +461,6 @@ static int sriov_init(struct pci_dev *dev, int pos)
else
iov->dev = dev;
mutex_init(&iov->lock);
dev->sriov = iov;
dev->is_physfn = 1;
rc = compute_max_vf_buses(dev);
@ -491,8 +489,6 @@ static void sriov_release(struct pci_dev *dev)
if (dev != dev->sriov->dev)
pci_dev_put(dev->sriov->dev);
mutex_destroy(&dev->sriov->lock);
kfree(dev->sriov);
dev->sriov = NULL;
}

14
drivers/pci/msi.c
View file

@ -1058,7 +1058,7 @@ static int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
for (;;) {
if (affd) {
nvec = irq_calc_affinity_vectors(nvec, affd);
nvec = irq_calc_affinity_vectors(minvec, nvec, affd);
if (nvec < minvec)
return -ENOSPC;
}
@ -1097,7 +1097,7 @@ static int __pci_enable_msix_range(struct pci_dev *dev,
for (;;) {
if (affd) {
nvec = irq_calc_affinity_vectors(nvec, affd);
nvec = irq_calc_affinity_vectors(minvec, nvec, affd);
if (nvec < minvec)
return -ENOSPC;
}
@ -1165,16 +1165,6 @@ int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
if (flags & PCI_IRQ_AFFINITY) {
if (!affd)
affd = &msi_default_affd;
if (affd->pre_vectors + affd->post_vectors > min_vecs)
return -EINVAL;
/*
* If there aren't any vectors left after applying the pre/post
* vectors don't bother with assigning affinity.
*/
if (affd->pre_vectors + affd->post_vectors == min_vecs)
affd = NULL;
} else {
if (WARN_ON(affd))
affd = NULL;

3
drivers/pci/pci-driver.c
View file

@ -415,6 +415,8 @@ static int pci_device_probe(struct device *dev)
struct pci_dev *pci_dev = to_pci_dev(dev);
struct pci_driver *drv = to_pci_driver(dev->driver);
pci_assign_irq(pci_dev);
error = pcibios_alloc_irq(pci_dev);
if (error < 0)
return error;
@ -967,6 +969,7 @@ static int pci_pm_thaw_noirq(struct device *dev)
return pci_legacy_resume_early(dev);
pci_update_current_state(pci_dev, PCI_D0);
pci_restore_state(pci_dev);
if (drv && drv->pm && drv->pm->thaw_noirq)
error = drv->pm->thaw_noirq(dev);

7
drivers/pci/pci-label.c
View file

@ -43,9 +43,11 @@ static size_t find_smbios_instance_string(struct pci_dev *pdev, char *buf,
{
const struct dmi_device *dmi;
struct dmi_dev_onboard *donboard;
int domain_nr;
int bus;
int devfn;
domain_nr = pci_domain_nr(pdev->bus);
bus = pdev->bus->number;
devfn = pdev->devfn;
@ -53,8 +55,9 @@ static size_t find_smbios_instance_string(struct pci_dev *pdev, char *buf,
while ((dmi = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD,
NULL, dmi)) != NULL) {
donboard = dmi->device_data;
if (donboard && donboard->bus == bus &&
donboard->devfn == devfn) {
if (donboard && donboard->segment == domain_nr &&
donboard->bus == bus &&
donboard->devfn == devfn) {
if (buf) {
if (attribute == SMBIOS_ATTR_INSTANCE_SHOW)
return scnprintf(buf, PAGE_SIZE,

204
drivers/pci/pci-sysfs.c
View file

@ -154,6 +154,129 @@ static ssize_t resource_show(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR_RO(resource);
static ssize_t max_link_speed_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
u32 linkcap;
int err;
const char *speed;
err = pcie_capability_read_dword(pci_dev, PCI_EXP_LNKCAP, &linkcap);
if (err)
return -EINVAL;
switch (linkcap & PCI_EXP_LNKCAP_SLS) {
case PCI_EXP_LNKCAP_SLS_8_0GB:
speed = "8 GT/s";
break;
case PCI_EXP_LNKCAP_SLS_5_0GB:
speed = "5 GT/s";
break;
case PCI_EXP_LNKCAP_SLS_2_5GB:
speed = "2.5 GT/s";
break;
default:
speed = "Unknown speed";
}
return sprintf(buf, "%s\n", speed);
}
static DEVICE_ATTR_RO(max_link_speed);
static ssize_t max_link_width_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
u32 linkcap;
int err;
err = pcie_capability_read_dword(pci_dev, PCI_EXP_LNKCAP, &linkcap);
if (err)
return -EINVAL;
return sprintf(buf, "%u\n", (linkcap & PCI_EXP_LNKCAP_MLW) >> 4);
}
static DEVICE_ATTR_RO(max_link_width);
static ssize_t current_link_speed_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
u16 linkstat;
int err;
const char *speed;
err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat);
if (err)
return -EINVAL;
switch (linkstat & PCI_EXP_LNKSTA_CLS) {
case PCI_EXP_LNKSTA_CLS_8_0GB:
speed = "8 GT/s";
break;
case PCI_EXP_LNKSTA_CLS_5_0GB:
speed = "5 GT/s";
break;
case PCI_EXP_LNKSTA_CLS_2_5GB:
speed = "2.5 GT/s";
break;
default:
speed = "Unknown speed";
}
return sprintf(buf, "%s\n", speed);
}
static DEVICE_ATTR_RO(current_link_speed);
static ssize_t current_link_width_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
u16 linkstat;
int err;
err = pcie_capability_read_word(pci_dev, PCI_EXP_LNKSTA, &linkstat);
if (err)
return -EINVAL;
return sprintf(buf, "%u\n",
(linkstat & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT);
}
static DEVICE_ATTR_RO(current_link_width);
static ssize_t secondary_bus_number_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
u8 sec_bus;
int err;
err = pci_read_config_byte(pci_dev, PCI_SECONDARY_BUS, &sec_bus);
if (err)
return -EINVAL;
return sprintf(buf, "%u\n", sec_bus);
}
static DEVICE_ATTR_RO(secondary_bus_number);
static ssize_t subordinate_bus_number_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
u8 sub_bus;
int err;
err = pci_read_config_byte(pci_dev, PCI_SUBORDINATE_BUS, &sub_bus);
if (err)
return -EINVAL;
return sprintf(buf, "%u\n", sub_bus);
}
static DEVICE_ATTR_RO(subordinate_bus_number);
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
@ -472,7 +595,6 @@ static ssize_t sriov_numvfs_store(struct device *dev,
const char *buf, size_t count)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct pci_sriov *iov = pdev->sriov;
int ret;
u16 num_vfs;
@ -483,7 +605,7 @@ static ssize_t sriov_numvfs_store(struct device *dev,
if (num_vfs > pci_sriov_get_totalvfs(pdev))
return -ERANGE;
mutex_lock(&iov->dev->sriov->lock);
device_lock(&pdev->dev);
if (num_vfs == pdev->sriov->num_VFs)
goto exit;
@ -518,7 +640,7 @@ static ssize_t sriov_numvfs_store(struct device *dev,
num_vfs, ret);
exit:
mutex_unlock(&iov->dev->sriov->lock);
device_unlock(&pdev->dev);
if (ret < 0)
return ret;
@ -629,12 +751,17 @@ static struct attribute *pci_dev_attrs[] = {
NULL,
};
static const struct attribute_group pci_dev_group = {
.attrs = pci_dev_attrs,
static struct attribute *pci_bridge_attrs[] = {
&dev_attr_subordinate_bus_number.attr,
&dev_attr_secondary_bus_number.attr,
NULL,
};
const struct attribute_group *pci_dev_groups[] = {
&pci_dev_group,
static struct attribute *pcie_dev_attrs[] = {
&dev_attr_current_link_speed.attr,
&dev_attr_current_link_width.attr,
&dev_attr_max_link_width.attr,
&dev_attr_max_link_speed.attr,
NULL,
};
@ -1557,6 +1684,57 @@ static umode_t pci_dev_hp_attrs_are_visible(struct kobject *kobj,
return a->mode;
}
static umode_t pci_bridge_attrs_are_visible(struct kobject *kobj,
struct attribute *a, int n)
{
struct device *dev = kobj_to_dev(kobj);
struct pci_dev *pdev = to_pci_dev(dev);
if (pci_is_bridge(pdev))
return a->mode;
return 0;
}
static umode_t pcie_dev_attrs_are_visible(struct kobject *kobj,
struct attribute *a, int n)
{
struct device *dev = kobj_to_dev(kobj);
struct pci_dev *pdev = to_pci_dev(dev);
if (pci_is_pcie(pdev))
return a->mode;
return 0;
}
static const struct attribute_group pci_dev_group = {
.attrs = pci_dev_attrs,
};
const struct attribute_group *pci_dev_groups[] = {
&pci_dev_group,
NULL,
};
static const struct attribute_group pci_bridge_group = {
.attrs = pci_bridge_attrs,
};
const struct attribute_group *pci_bridge_groups[] = {
&pci_bridge_group,
NULL,
};
static const struct attribute_group pcie_dev_group = {
.attrs = pcie_dev_attrs,
};
const struct attribute_group *pcie_dev_groups[] = {
&pcie_dev_group,
NULL,
};
static struct attribute_group pci_dev_hp_attr_group = {
.attrs = pci_dev_hp_attrs,
.is_visible = pci_dev_hp_attrs_are_visible,
@ -1592,12 +1770,24 @@ static struct attribute_group pci_dev_attr_group = {
.is_visible = pci_dev_attrs_are_visible,
};
static struct attribute_group pci_bridge_attr_group = {
.attrs = pci_bridge_attrs,
.is_visible = pci_bridge_attrs_are_visible,
};
static struct attribute_group pcie_dev_attr_group = {
.attrs = pcie_dev_attrs,
.is_visible = pcie_dev_attrs_are_visible,
};
static const struct attribute_group *pci_dev_attr_groups[] = {
&pci_dev_attr_group,
&pci_dev_hp_attr_group,
#ifdef CONFIG_PCI_IOV
&sriov_dev_attr_group,
#endif
&pci_bridge_attr_group,
&pcie_dev_attr_group,
NULL,
};

227
drivers/pci/pci.c
View file

@ -28,6 +28,7 @@
#include <linux/pm_runtime.h>
#include <linux/pci_hotplug.h>
#include <linux/vmalloc.h>
#include <linux/pci-ats.h>
#include <asm/setup.h>
#include <asm/dma.h>
#include <linux/aer.h>
@ -455,7 +456,7 @@ struct resource *pci_find_parent_resource(const struct pci_dev *dev,
pci_bus_for_each_resource(bus, r, i) {
if (!r)
continue;
if (res->start && resource_contains(r, res)) {
if (resource_contains(r, res)) {
/*
* If the window is prefetchable but the BAR is
@ -1166,6 +1167,8 @@ void pci_restore_state(struct pci_dev *dev)
/* PCI Express register must be restored first */
pci_restore_pcie_state(dev);
pci_restore_pasid_state(dev);
pci_restore_pri_state(dev);
pci_restore_ats_state(dev);
pci_restore_vc_state(dev);
@ -1966,12 +1969,13 @@ EXPORT_SYMBOL(pci_wake_from_d3);
/**
* pci_target_state - find an appropriate low power state for a given PCI dev
* @dev: PCI device
* @wakeup: Whether or not wakeup functionality will be enabled for the device.
*
* Use underlying platform code to find a supported low power state for @dev.
* If the platform can't manage @dev, return the deepest state from which it
* can generate wake events, based on any available PME info.
*/
static pci_power_t pci_target_state(struct pci_dev *dev)
static pci_power_t pci_target_state(struct pci_dev *dev, bool wakeup)
{
pci_power_t target_state = PCI_D3hot;
@ -2008,7 +2012,7 @@ static pci_power_t pci_target_state(struct pci_dev *dev)
if (dev->current_state == PCI_D3cold)
target_state = PCI_D3cold;
if (device_may_wakeup(&dev->dev)) {
if (wakeup) {
/*
* Find the deepest state from which the device can generate
* wake-up events, make it the target state and enable device
@ -2034,13 +2038,14 @@ static pci_power_t pci_target_state(struct pci_dev *dev)
*/
int pci_prepare_to_sleep(struct pci_dev *dev)
{
pci_power_t target_state = pci_target_state(dev);
bool wakeup = device_may_wakeup(&dev->dev);
pci_power_t target_state = pci_target_state(dev, wakeup);
int error;
if (target_state == PCI_POWER_ERROR)
return -EIO;
pci_enable_wake(dev, target_state, device_may_wakeup(&dev->dev));
pci_enable_wake(dev, target_state, wakeup);
error = pci_set_power_state(dev, target_state);
@ -2073,9 +2078,10 @@ EXPORT_SYMBOL(pci_back_from_sleep);
*/
int pci_finish_runtime_suspend(struct pci_dev *dev)
{
pci_power_t target_state = pci_target_state(dev);
pci_power_t target_state;
int error;
target_state = pci_target_state(dev, device_can_wakeup(&dev->dev));
if (target_state == PCI_POWER_ERROR)
return -EIO;
@ -2111,8 +2117,8 @@ bool pci_dev_run_wake(struct pci_dev *dev)
if (!dev->pme_support)
return false;
/* PME-capable in principle, but not from the intended sleep state */
if (!pci_pme_capable(dev, pci_target_state(dev)))
/* PME-capable in principle, but not from the target power state */
if (!pci_pme_capable(dev, pci_target_state(dev, false)))
return false;
while (bus->parent) {
@ -2147,9 +2153,10 @@ EXPORT_SYMBOL_GPL(pci_dev_run_wake);
bool pci_dev_keep_suspended(struct pci_dev *pci_dev)
{
struct device *dev = &pci_dev->dev;
bool wakeup = device_may_wakeup(dev);
if (!pm_runtime_suspended(dev)
|| pci_target_state(pci_dev) != pci_dev->current_state
|| pci_target_state(pci_dev, wakeup) != pci_dev->current_state
|| platform_pci_need_resume(pci_dev)
|| (pci_dev->dev_flags & PCI_DEV_FLAGS_NEEDS_RESUME))
return false;
@ -2167,7 +2174,7 @@ bool pci_dev_keep_suspended(struct pci_dev *pci_dev)
spin_lock_irq(&dev->power.lock);
if (pm_runtime_suspended(dev) && pci_dev->current_state < PCI_D3cold &&
!device_may_wakeup(dev))
!wakeup)
__pci_pme_active(pci_dev, false);
spin_unlock_irq(&dev->power.lock);
@ -3715,46 +3722,6 @@ void pci_intx(struct pci_dev *pdev, int enable)
}
EXPORT_SYMBOL_GPL(pci_intx);
/**
* pci_intx_mask_supported - probe for INTx masking support
* @dev: the PCI device to operate on
*
* Check if the device dev support INTx masking via the config space
* command word.
*/
bool pci_intx_mask_supported(struct pci_dev *dev)
{
bool mask_supported = false;
u16 orig, new;
if (dev->broken_intx_masking)
return false;
pci_cfg_access_lock(dev);
pci_read_config_word(dev, PCI_COMMAND, &orig);
pci_write_config_word(dev, PCI_COMMAND,
orig ^ PCI_COMMAND_INTX_DISABLE);
pci_read_config_word(dev, PCI_COMMAND, &new);
/*
* There's no way to protect against hardware bugs or detect them
* reliably, but as long as we know what the value should be, let's
* go ahead and check it.
*/
if ((new ^ orig) & ~PCI_COMMAND_INTX_DISABLE) {
dev_err(&dev->dev, "Command register changed from 0x%x to 0x%x: driver or hardware bug?\n",
orig, new);
} else if ((new ^ orig) & PCI_COMMAND_INTX_DISABLE) {
mask_supported = true;
pci_write_config_word(dev, PCI_COMMAND, orig);
}
pci_cfg_access_unlock(dev);
return mask_supported;
}
EXPORT_SYMBOL_GPL(pci_intx_mask_supported);
static bool pci_check_and_set_intx_mask(struct pci_dev *dev, bool mask)
{
struct pci_bus *bus = dev->bus;
@ -3805,7 +3772,7 @@ static bool pci_check_and_set_intx_mask(struct pci_dev *dev, bool mask)
* @dev: the PCI device to operate on
*
* Check if the device dev has its INTx line asserted, mask it and
* return true in that case. False is returned if not interrupt was
* return true in that case. False is returned if no interrupt was
* pending.
*/
bool pci_check_and_mask_intx(struct pci_dev *dev)
@ -4075,40 +4042,6 @@ static int pci_dev_reset_slot_function(struct pci_dev *dev, int probe)
return pci_reset_hotplug_slot(dev->slot->hotplug, probe);
}
static int __pci_dev_reset(struct pci_dev *dev, int probe)
{
int rc;
might_sleep();
rc = pci_dev_specific_reset(dev, probe);
if (rc != -ENOTTY)
goto done;
if (pcie_has_flr(dev)) {
if (!probe)
pcie_flr(dev);
rc = 0;
goto done;
}
rc = pci_af_flr(dev, probe);
if (rc != -ENOTTY)
goto done;
rc = pci_pm_reset(dev, probe);
if (rc != -ENOTTY)
goto done;
rc = pci_dev_reset_slot_function(dev, probe);
if (rc != -ENOTTY)
goto done;
rc = pci_parent_bus_reset(dev, probe);
done:
return rc;
}
static void pci_dev_lock(struct pci_dev *dev)
{
pci_cfg_access_lock(dev);
@ -4134,26 +4067,18 @@ static void pci_dev_unlock(struct pci_dev *dev)
pci_cfg_access_unlock(dev);
}
/**
* pci_reset_notify - notify device driver of reset
* @dev: device to be notified of reset
* @prepare: 'true' if device is about to be reset; 'false' if reset attempt
* completed
*
* Must be called prior to device access being disabled and after device
* access is restored.
*/
static void pci_reset_notify(struct pci_dev *dev, bool prepare)
static void pci_dev_save_and_disable(struct pci_dev *dev)
{
const struct pci_error_handlers *err_handler =
dev->driver ? dev->driver->err_handler : NULL;
if (err_handler && err_handler->reset_notify)
err_handler->reset_notify(dev, prepare);
}
static void pci_dev_save_and_disable(struct pci_dev *dev)
{
pci_reset_notify(dev, true);
/*
* dev->driver->err_handler->reset_prepare() is protected against
* races with ->remove() by the device lock, which must be held by
* the caller.
*/
if (err_handler && err_handler->reset_prepare)
err_handler->reset_prepare(dev);
/*
* Wake-up device prior to save. PM registers default to D0 after
@ -4175,23 +4100,18 @@ static void pci_dev_save_and_disable(struct pci_dev *dev)
static void pci_dev_restore(struct pci_dev *dev)
{
const struct pci_error_handlers *err_handler =
dev->driver ? dev->driver->err_handler : NULL;
pci_restore_state(dev);
pci_reset_notify(dev, false);
}
static int pci_dev_reset(struct pci_dev *dev, int probe)
{
int rc;
if (!probe)
pci_dev_lock(dev);
rc = __pci_dev_reset(dev, probe);
if (!probe)
pci_dev_unlock(dev);
return rc;
/*
* dev->driver->err_handler->reset_done() is protected against
* races with ->remove() by the device lock, which must be held by
* the caller.
*/
if (err_handler && err_handler->reset_done)
err_handler->reset_done(dev);
}
/**
@ -4213,7 +4133,13 @@ static int pci_dev_reset(struct pci_dev *dev, int probe)
*/
int __pci_reset_function(struct pci_dev *dev)
{
return pci_dev_reset(dev, 0);
int ret;
pci_dev_lock(dev);
ret = __pci_reset_function_locked(dev);
pci_dev_unlock(dev);
return ret;
}
EXPORT_SYMBOL_GPL(__pci_reset_function);
@ -4238,7 +4164,27 @@ EXPORT_SYMBOL_GPL(__pci_reset_function);
*/
int __pci_reset_function_locked(struct pci_dev *dev)
{
return __pci_dev_reset(dev, 0);
int rc;
might_sleep();
rc = pci_dev_specific_reset(dev, 0);
if (rc != -ENOTTY)
return rc;
if (pcie_has_flr(dev)) {
pcie_flr(dev);
return 0;
}
rc = pci_af_flr(dev, 0);
if (rc != -ENOTTY)
return rc;
rc = pci_pm_reset(dev, 0);
if (rc != -ENOTTY)
return rc;
rc = pci_dev_reset_slot_function(dev, 0);
if (rc != -ENOTTY)
return rc;
return pci_parent_bus_reset(dev, 0);
}
EXPORT_SYMBOL_GPL(__pci_reset_function_locked);
@ -4255,7 +4201,26 @@ EXPORT_SYMBOL_GPL(__pci_reset_function_locked);
*/
int pci_probe_reset_function(struct pci_dev *dev)
{
return pci_dev_reset(dev, 1);
int rc;
might_sleep();
rc = pci_dev_specific_reset(dev, 1);
if (rc != -ENOTTY)
return rc;
if (pcie_has_flr(dev))
return 0;
rc = pci_af_flr(dev, 1);
if (rc != -ENOTTY)
return rc;
rc = pci_pm_reset(dev, 1);
if (rc != -ENOTTY)
return rc;
rc = pci_dev_reset_slot_function(dev, 1);
if (rc != -ENOTTY)
return rc;
return pci_parent_bus_reset(dev, 1);
}
/**
@ -4278,15 +4243,17 @@ int pci_reset_function(struct pci_dev *dev)
{
int rc;
rc = pci_dev_reset(dev, 1);
rc = pci_probe_reset_function(dev);
if (rc)
return rc;
pci_dev_lock(dev);
pci_dev_save_and_disable(dev);
rc = pci_dev_reset(dev, 0);
rc = __pci_reset_function_locked(dev);
pci_dev_restore(dev);
pci_dev_unlock(dev);
return rc;
}
@ -4302,20 +4269,18 @@ int pci_try_reset_function(struct pci_dev *dev)
{
int rc;
rc = pci_dev_reset(dev, 1);
rc = pci_probe_reset_function(dev);
if (rc)
return rc;
pci_dev_save_and_disable(dev);
if (!pci_dev_trylock(dev))
return -EAGAIN;
if (pci_dev_trylock(dev)) {
rc = __pci_dev_reset(dev, 0);
pci_dev_unlock(dev);
} else
rc = -EAGAIN;
pci_dev_save_and_disable(dev);
rc = __pci_reset_function_locked(dev);
pci_dev_unlock(dev);
pci_dev_restore(dev);
return rc;
}
EXPORT_SYMBOL_GPL(pci_try_reset_function);
@ -4465,7 +4430,9 @@ static void pci_bus_save_and_disable(struct pci_bus *bus)
struct pci_dev *dev;
list_for_each_entry(dev, &bus->devices, bus_list) {
pci_dev_lock(dev);
pci_dev_save_and_disable(dev);
pci_dev_unlock(dev);
if (dev->subordinate)
pci_bus_save_and_disable(dev->subordinate);
}
@ -4480,7 +4447,9 @@ static void pci_bus_restore(struct pci_bus *bus)
struct pci_dev *dev;
list_for_each_entry(dev, &bus->devices, bus_list) {
pci_dev_lock(dev);
pci_dev_restore(dev);
pci_dev_unlock(dev);
if (dev->subordinate)
pci_bus_restore(dev->subordinate);
}

1
drivers/pci/pci.h
View file

@ -267,7 +267,6 @@ struct pci_sriov {
u16 driver_max_VFs; /* max num VFs driver supports */
struct pci_dev *dev; /* lowest numbered PF */
struct pci_dev *self; /* this PF */
struct mutex lock; /* lock for setting sriov_numvfs in sysfs */
resource_size_t barsz[PCI_SRIOV_NUM_BARS]; /* VF BAR size */
bool drivers_autoprobe; /* auto probing of VFs by driver */
};

4
drivers/pci/pcie/pcie-dpc.c
View file

@ -92,7 +92,7 @@ static irqreturn_t dpc_irq(int irq, void *context)
pci_read_config_word(pdev, dpc->cap_pos + PCI_EXP_DPC_STATUS, &status);
pci_read_config_word(pdev, dpc->cap_pos + PCI_EXP_DPC_SOURCE_ID,
&source);
if (!status)
if (!status || status == (u16)(~0))
return IRQ_NONE;
dev_info(&dpc->dev->device, "DPC containment event, status:%#06x source:%#06x\n",
@ -144,7 +144,7 @@ static int dpc_probe(struct pcie_device *dev)
dpc->rp = (cap & PCI_EXP_DPC_CAP_RP_EXT);
ctl |= PCI_EXP_DPC_CTL_EN_NONFATAL | PCI_EXP_DPC_CTL_INT_EN;
ctl = (ctl & 0xfff4) | PCI_EXP_DPC_CTL_EN_NONFATAL | PCI_EXP_DPC_CTL_INT_EN;
pci_write_config_word(pdev, dpc->cap_pos + PCI_EXP_DPC_CTL, ctl);
dev_info(&dev->device, "DPC error containment capabilities: Int Msg #%d, RPExt%c PoisonedTLP%c SwTrigger%c RP PIO Log %d, DL_ActiveErr%c\n",

7
drivers/pci/pcie/portdrv.h
View file

@ -13,10 +13,11 @@
#define PCIE_PORT_DEVICE_MAXSERVICES 5
/*
* According to the PCI Express Base Specification 2.0, the indices of
* the MSI-X table entries used by port services must not exceed 31
* The PCIe Capability Interrupt Message Number (PCIe r3.1, sec 7.8.2) must
* be one of the first 32 MSI-X entries. Per PCI r3.0, sec 6.8.3.1, MSI
* supports a maximum of 32 vectors per function.
*/
#define PCIE_PORT_MAX_MSIX_ENTRIES 32
#define PCIE_PORT_MAX_MSI_ENTRIES 32
#define get_descriptor_id(type, service) (((type - 4) << 8) | service)

104
drivers/pci/pcie/portdrv_core.c
View file

@ -44,14 +44,15 @@ static void release_pcie_device(struct device *dev)
}
/**
* pcie_port_enable_msix - try to set up MSI-X as interrupt mode for given port
* pcie_port_enable_irq_vec - try to set up MSI-X or MSI as interrupt mode
* for given port
* @dev: PCI Express port to handle
* @irqs: Array of interrupt vectors to populate
* @mask: Bitmask of port capabilities returned by get_port_device_capability()
*
* Return value: 0 on success, error code on failure
*/
static int pcie_port_enable_msix(struct pci_dev *dev, int *irqs, int mask)
static int pcie_port_enable_irq_vec(struct pci_dev *dev, int *irqs, int mask)
{
int nr_entries, entry, nvec = 0;
@ -61,8 +62,8 @@ static int pcie_port_enable_msix(struct pci_dev *dev, int *irqs, int mask)
* equal to the number of entries this port actually uses, we'll happily
* go through without any tricks.
*/
nr_entries = pci_alloc_irq_vectors(dev, 1, PCIE_PORT_MAX_MSIX_ENTRIES,
PCI_IRQ_MSIX);
nr_entries = pci_alloc_irq_vectors(dev, 1, PCIE_PORT_MAX_MSI_ENTRIES,
PCI_IRQ_MSIX | PCI_IRQ_MSI);
if (nr_entries < 0)
return nr_entries;
@ -70,14 +71,19 @@ static int pcie_port_enable_msix(struct pci_dev *dev, int *irqs, int mask)
u16 reg16;
/*
* The code below follows the PCI Express Base Specification 2.0
* stating in Section 6.1.6 that "PME and Hot-Plug Event
* interrupts (when both are implemented) always share the same
* MSI or MSI-X vector, as indicated by the Interrupt Message
* Number field in the PCI Express Capabilities register", where
* according to Section 7.8.2 of the specification "For MSI-X,
* the value in this field indicates which MSI-X Table entry is
* used to generate the interrupt message."
* Per PCIe r3.1, sec 6.1.6, "PME and Hot-Plug Event
* interrupts (when both are implemented) always share the
* same MSI or MSI-X vector, as indicated by the Interrupt
* Message Number field in the PCI Express Capabilities
* register".
*
* Per sec 7.8.2, "For MSI, the [Interrupt Message Number]
* indicates the offset between the base Message Data and
* the interrupt message that is generated."
*
* "For MSI-X, the [Interrupt Message Number] indicates
* which MSI-X Table entry is used to generate the
* interrupt message."
*/
pcie_capability_read_word(dev, PCI_EXP_FLAGS, &reg16);
entry = (reg16 & PCI_EXP_FLAGS_IRQ) >> 9;
@ -94,13 +100,17 @@ static int pcie_port_enable_msix(struct pci_dev *dev, int *irqs, int mask)
u32 reg32, pos;
/*
* The code below follows Section 7.10.10 of the PCI Express
* Base Specification 2.0 stating that bits 31-27 of the Root
* Error Status Register contain a value indicating which of the
* MSI/MSI-X vectors assigned to the port is going to be used
* for AER, where "For MSI-X, the value in this register
* indicates which MSI-X Table entry is used to generate the
* interrupt message."
* Per PCIe r3.1, sec 7.10.10, the Advanced Error Interrupt
* Message Number in the Root Error Status register
* indicates which MSI/MSI-X vector is used for AER.
*
* "For MSI, the [Advanced Error Interrupt Message Number]
* indicates the offset between the base Message Data and
* the interrupt message that is generated."
*
* "For MSI-X, the [Advanced Error Interrupt Message
* Number] indicates which MSI-X Table entry is used to
* generate the interrupt message."
*/
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, &reg32);
@ -113,6 +123,33 @@ static int pcie_port_enable_msix(struct pci_dev *dev, int *irqs, int mask)
nvec = max(nvec, entry + 1);
}
if (mask & PCIE_PORT_SERVICE_DPC) {
u16 reg16, pos;
/*
* Per PCIe r4.0 (v0.9), sec 7.9.15.2, the DPC Interrupt
* Message Number in the DPC Capability register indicates
* which MSI/MSI-X vector is used for DPC.
*
* "For MSI, the [DPC Interrupt Message Number] indicates
* the offset between the base Message Data and the
* interrupt message that is generated."
*
* "For MSI-X, the [DPC Interrupt Message Number] indicates
* which MSI-X Table entry is used to generate the
* interrupt message."
*/
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_DPC);
pci_read_config_word(dev, pos + PCI_EXP_DPC_CAP, &reg16);
entry = reg16 & 0x1f;
if (entry >= nr_entries)
goto out_free_irqs;
irqs[PCIE_PORT_SERVICE_DPC_SHIFT] = pci_irq_vector(dev, entry);
nvec = max(nvec, entry + 1);
}
/*
* If nvec is equal to the allocated number of entries, we can just use
* what we have. Otherwise, the port has some extra entries not for the
@ -124,7 +161,7 @@ static int pcie_port_enable_msix(struct pci_dev *dev, int *irqs, int mask)
/* Now allocate the MSI-X vectors for real */
nr_entries = pci_alloc_irq_vectors(dev, nvec, nvec,
PCI_IRQ_MSIX);
PCI_IRQ_MSIX | PCI_IRQ_MSI);
if (nr_entries < 0)
return nr_entries;
}
@ -146,26 +183,29 @@ static int pcie_port_enable_msix(struct pci_dev *dev, int *irqs, int mask)
*/
static int pcie_init_service_irqs(struct pci_dev *dev, int *irqs, int mask)
{
unsigned flags = PCI_IRQ_LEGACY | PCI_IRQ_MSI;
int ret, i;
for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++)
irqs[i] = -1;
/*
* If MSI cannot be used for PCIe PME or hotplug, we have to use
* INTx or other interrupts, e.g. system shared interrupt.
* If we support PME or hotplug, but we can't use MSI/MSI-X for
* them, we have to fall back to INTx or other interrupts, e.g., a
* system shared interrupt.
*/
if (((mask & PCIE_PORT_SERVICE_PME) && pcie_pme_no_msi()) ||
((mask & PCIE_PORT_SERVICE_HP) && pciehp_no_msi())) {
flags &= ~PCI_IRQ_MSI;
} else {
/* Try to use MSI-X if supported */
if (!pcie_port_enable_msix(dev, irqs, mask))
return 0;
}
if ((mask & PCIE_PORT_SERVICE_PME) && pcie_pme_no_msi())
goto legacy_irq;
ret = pci_alloc_irq_vectors(dev, 1, 1, flags);
if ((mask & PCIE_PORT_SERVICE_HP) && pciehp_no_msi())
goto legacy_irq;
/* Try to use MSI-X or MSI if supported */
if (pcie_port_enable_irq_vec(dev, irqs, mask) == 0)
return 0;
legacy_irq:
/* fall back to legacy IRQ */
ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_LEGACY);
if (ret < 0)
return -ENODEV;

140
drivers/pci/probe.c
View file

@ -510,16 +510,18 @@ static struct pci_bus *pci_alloc_bus(struct pci_bus *parent)
return b;
}
static void pci_release_host_bridge_dev(struct device *dev)
static void devm_pci_release_host_bridge_dev(struct device *dev)
{
struct pci_host_bridge *bridge = to_pci_host_bridge(dev);
if (bridge->release_fn)
bridge->release_fn(bridge);
}
pci_free_resource_list(&bridge->windows);
kfree(bridge);
static void pci_release_host_bridge_dev(struct device *dev)
{
devm_pci_release_host_bridge_dev(dev);
pci_free_host_bridge(to_pci_host_bridge(dev));
}
struct pci_host_bridge *pci_alloc_host_bridge(size_t priv)
@ -531,11 +533,36 @@ struct pci_host_bridge *pci_alloc_host_bridge(size_t priv)
return NULL;
INIT_LIST_HEAD(&bridge->windows);
bridge->dev.release = pci_release_host_bridge_dev;
return bridge;
}
EXPORT_SYMBOL(pci_alloc_host_bridge);
struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
size_t priv)
{
struct pci_host_bridge *bridge;
bridge = devm_kzalloc(dev, sizeof(*bridge) + priv, GFP_KERNEL);
if (!bridge)
return NULL;
INIT_LIST_HEAD(&bridge->windows);
bridge->dev.release = devm_pci_release_host_bridge_dev;
return bridge;
}
EXPORT_SYMBOL(devm_pci_alloc_host_bridge);
void pci_free_host_bridge(struct pci_host_bridge *bridge)
{
pci_free_resource_list(&bridge->windows);
kfree(bridge);
}
EXPORT_SYMBOL(pci_free_host_bridge);
static const unsigned char pcix_bus_speed[] = {
PCI_SPEED_UNKNOWN, /* 0 */
PCI_SPEED_66MHz_PCIX, /* 1 */
@ -719,7 +746,7 @@ static void pci_set_bus_msi_domain(struct pci_bus *bus)
dev_set_msi_domain(&bus->dev, d);
}
int pci_register_host_bridge(struct pci_host_bridge *bridge)
static int pci_register_host_bridge(struct pci_host_bridge *bridge)
{
struct device *parent = bridge->dev.parent;
struct resource_entry *window, *n;
@ -834,7 +861,6 @@ int pci_register_host_bridge(struct pci_host_bridge *bridge)
kfree(bus);
return err;
}
EXPORT_SYMBOL(pci_register_host_bridge);
static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
struct pci_dev *bridge, int busnr)
@ -1329,6 +1355,34 @@ static void pci_msi_setup_pci_dev(struct pci_dev *dev)
pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0);
}
/**
* pci_intx_mask_broken - test PCI_COMMAND_INTX_DISABLE writability
* @dev: PCI device
*
* Test whether PCI_COMMAND_INTX_DISABLE is writable for @dev. Check this
* at enumeration-time to avoid modifying PCI_COMMAND at run-time.
*/
static int pci_intx_mask_broken(struct pci_dev *dev)
{
u16 orig, toggle, new;
pci_read_config_word(dev, PCI_COMMAND, &orig);
toggle = orig ^ PCI_COMMAND_INTX_DISABLE;
pci_write_config_word(dev, PCI_COMMAND, toggle);
pci_read_config_word(dev, PCI_COMMAND, &new);
pci_write_config_word(dev, PCI_COMMAND, orig);
/*
* PCI_COMMAND_INTX_DISABLE was reserved and read-only prior to PCI
* r2.3, so strictly speaking, a device is not *broken* if it's not
* writable. But we'll live with the misnomer for now.
*/
if (new != toggle)
return 1;
return 0;
}
/**
* pci_setup_device - fill in class and map information of a device
* @dev: the device structure to fill
@ -1399,6 +1453,8 @@ int pci_setup_device(struct pci_dev *dev)
}
}
dev->broken_intx_masking = pci_intx_mask_broken(dev);
switch (dev->hdr_type) { /* header type */
case PCI_HEADER_TYPE_NORMAL: /* standard header */
if (class == PCI_CLASS_BRIDGE_PCI)
@ -1674,6 +1730,11 @@ static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
/* Initialize Advanced Error Capabilities and Control Register */
pci_read_config_dword(dev, pos + PCI_ERR_CAP, &reg32);
reg32 = (reg32 & hpp->adv_err_cap_and) | hpp->adv_err_cap_or;
/* Don't enable ECRC generation or checking if unsupported */
if (!(reg32 & PCI_ERR_CAP_ECRC_GENC))
reg32 &= ~PCI_ERR_CAP_ECRC_GENE;
if (!(reg32 & PCI_ERR_CAP_ECRC_CHKC))
reg32 &= ~PCI_ERR_CAP_ECRC_CHKE;
pci_write_config_dword(dev, pos + PCI_ERR_CAP, reg32);
/*
@ -2298,9 +2359,8 @@ void __weak pcibios_remove_bus(struct pci_bus *bus)
{
}
static struct pci_bus *pci_create_root_bus_msi(struct device *parent,
int bus, struct pci_ops *ops, void *sysdata,
struct list_head *resources, struct msi_controller *msi)
struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata, struct list_head *resources)
{
int error;
struct pci_host_bridge *bridge;
@ -2310,13 +2370,11 @@ static struct pci_bus *pci_create_root_bus_msi(struct device *parent,
return NULL;
bridge->dev.parent = parent;
bridge->dev.release = pci_release_host_bridge_dev;
list_splice_init(resources, &bridge->windows);
bridge->sysdata = sysdata;
bridge->busnr = bus;
bridge->ops = ops;
bridge->msi = msi;
error = pci_register_host_bridge(bridge);
if (error < 0)
@ -2328,13 +2386,6 @@ static struct pci_bus *pci_create_root_bus_msi(struct device *parent,
kfree(bridge);
return NULL;
}
struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata, struct list_head *resources)
{
return pci_create_root_bus_msi(parent, bus, ops, sysdata, resources,
NULL);
}
EXPORT_SYMBOL_GPL(pci_create_root_bus);
int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int bus_max)
@ -2400,9 +2451,47 @@ void pci_bus_release_busn_res(struct pci_bus *b)
res, ret ? "can not be" : "is");
}
struct pci_bus *pci_scan_root_bus_msi(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata,
struct list_head *resources, struct msi_controller *msi)
int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge)
{
struct resource_entry *window;
bool found = false;
struct pci_bus *b;
int max, bus, ret;
if (!bridge)
return -EINVAL;
resource_list_for_each_entry(window, &bridge->windows)
if (window->res->flags & IORESOURCE_BUS) {
found = true;
break;
}
ret = pci_register_host_bridge(bridge);
if (ret < 0)
return ret;
b = bridge->bus;
bus = bridge->busnr;
if (!found) {
dev_info(&b->dev,
"No busn resource found for root bus, will use [bus %02x-ff]\n",
bus);
pci_bus_insert_busn_res(b, bus, 255);
}
max = pci_scan_child_bus(b);
if (!found)
pci_bus_update_busn_res_end(b, max);
return 0;
}
EXPORT_SYMBOL(pci_scan_root_bus_bridge);
struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata, struct list_head *resources)
{
struct resource_entry *window;
bool found = false;
@ -2415,7 +2504,7 @@ struct pci_bus *pci_scan_root_bus_msi(struct device *parent, int bus,
break;
}
b = pci_create_root_bus_msi(parent, bus, ops, sysdata, resources, msi);
b = pci_create_root_bus(parent, bus, ops, sysdata, resources);
if (!b)
return NULL;
@ -2433,13 +2522,6 @@ struct pci_bus *pci_scan_root_bus_msi(struct device *parent, int bus,
return b;
}
struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata, struct list_head *resources)
{
return pci_scan_root_bus_msi(parent, bus, ops, sysdata, resources,
NULL);
}
EXPORT_SYMBOL(pci_scan_root_bus);
struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,

19
drivers/pci/quirks.c
View file

@ -304,7 +304,7 @@ static void quirk_extend_bar_to_page(struct pci_dev *dev)
{
int i;
for (i = 0; i < PCI_STD_RESOURCE_END; i++) {
for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
struct resource *r = &dev->resource[i];
if (r->flags & IORESOURCE_MEM && resource_size(r) < PAGE_SIZE) {
@ -1684,6 +1684,19 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2609, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x260a, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x260b, quirk_intel_pcie_pm);
static void quirk_radeon_pm(struct pci_dev *dev)
{
if (dev->subsystem_vendor == PCI_VENDOR_ID_APPLE &&
dev->subsystem_device == 0x00e2) {
if (dev->d3_delay < 20) {
dev->d3_delay = 20;
dev_info(&dev->dev, "extending delay after power-on from D3 to %d msec\n",
dev->d3_delay);
}
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6741, quirk_radeon_pm);
#ifdef CONFIG_X86_IO_APIC
static int dmi_disable_ioapicreroute(const struct dmi_system_id *d)
{
@ -3236,6 +3249,10 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1588,
quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1589,
quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x158a,
quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x158b,
quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d0,
quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d1,

45
drivers/pci/setup-irq.c
View file

@ -15,6 +15,7 @@
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/cache.h>
#include "pci.h"
void __weak pcibios_update_irq(struct pci_dev *dev, int irq)
{
@ -22,12 +23,17 @@ void __weak pcibios_update_irq(struct pci_dev *dev, int irq)
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
}
static void pdev_fixup_irq(struct pci_dev *dev,
u8 (*swizzle)(struct pci_dev *, u8 *),
int (*map_irq)(const struct pci_dev *, u8, u8))
void pci_assign_irq(struct pci_dev *dev)
{
u8 pin, slot;
u8 pin;
u8 slot = -1;
int irq = 0;
struct pci_host_bridge *hbrg = pci_find_host_bridge(dev->bus);
if (!(hbrg->map_irq)) {
dev_dbg(&dev->dev, "runtime IRQ mapping not provided by arch\n");
return;
}
/* If this device is not on the primary bus, we need to figure out
which interrupt pin it will come in on. We know which slot it
@ -40,17 +46,22 @@ static void pdev_fixup_irq(struct pci_dev *dev,
if (pin > 4)
pin = 1;
if (pin != 0) {
if (pin) {
/* Follow the chain of bridges, swizzling as we go. */
slot = (*swizzle)(dev, &pin);
if (hbrg->swizzle_irq)
slot = (*(hbrg->swizzle_irq))(dev, &pin);
irq = (*map_irq)(dev, slot, pin);
/*
* If a swizzling function is not used map_irq must
* ignore slot
*/
irq = (*(hbrg->map_irq))(dev, slot, pin);
if (irq == -1)
irq = 0;
}
dev->irq = irq;
dev_dbg(&dev->dev, "fixup irq: got %d\n", dev->irq);
dev_dbg(&dev->dev, "assign IRQ: got %d\n", dev->irq);
/* Always tell the device, so the driver knows what is
the real IRQ to use; the device does not use it. */
@ -60,9 +71,23 @@ static void pdev_fixup_irq(struct pci_dev *dev,
void pci_fixup_irqs(u8 (*swizzle)(struct pci_dev *, u8 *),
int (*map_irq)(const struct pci_dev *, u8, u8))
{
/*
* Implement pci_fixup_irqs() through pci_assign_irq().
* This code should be remove eventually, it is a wrapper
* around pci_assign_irq() interface to keep current
* pci_fixup_irqs() behaviour unchanged on architecture
* code still relying on its interface.
*/
struct pci_dev *dev = NULL;
struct pci_host_bridge *hbrg = NULL;
for_each_pci_dev(dev)
pdev_fixup_irq(dev, swizzle, map_irq);
for_each_pci_dev(dev) {
hbrg = pci_find_host_bridge(dev->bus);
hbrg->swizzle_irq = swizzle;
hbrg->map_irq = map_irq;
pci_assign_irq(dev);
hbrg->swizzle_irq = NULL;
hbrg->map_irq = NULL;
}
}
EXPORT_SYMBOL_GPL(pci_fixup_irqs);

40
drivers/pci/switch/switchtec.c
View file

@ -120,6 +120,13 @@ struct sw_event_regs {
u32 reserved16[4];
} __packed;
enum {
SWITCHTEC_CFG0_RUNNING = 0x04,
SWITCHTEC_CFG1_RUNNING = 0x05,
SWITCHTEC_IMG0_RUNNING = 0x03,
SWITCHTEC_IMG1_RUNNING = 0x07,
};
struct sys_info_regs {
u32 device_id;
u32 device_version;
@ -129,7 +136,9 @@ struct sys_info_regs {
u32 table_format_version;
u32 partition_id;
u32 cfg_file_fmt_version;
u32 reserved2[58];
u16 cfg_running;
u16 img_running;
u32 reserved2[57];
char vendor_id[8];
char product_id[16];
char product_revision[4];
@ -807,6 +816,7 @@ static int ioctl_flash_part_info(struct switchtec_dev *stdev,
{
struct switchtec_ioctl_flash_part_info info = {0};
struct flash_info_regs __iomem *fi = stdev->mmio_flash_info;
struct sys_info_regs __iomem *si = stdev->mmio_sys_info;
u32 active_addr = -1;
if (copy_from_user(&info, uinfo, sizeof(info)))
@ -816,18 +826,26 @@ static int ioctl_flash_part_info(struct switchtec_dev *stdev,
case SWITCHTEC_IOCTL_PART_CFG0:
active_addr = ioread32(&fi->active_cfg);
set_fw_info_part(&info, &fi->cfg0);
if (ioread16(&si->cfg_running) == SWITCHTEC_CFG0_RUNNING)
info.active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_CFG1:
active_addr = ioread32(&fi->active_cfg);
set_fw_info_part(&info, &fi->cfg1);
if (ioread16(&si->cfg_running) == SWITCHTEC_CFG1_RUNNING)
info.active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_IMG0:
active_addr = ioread32(&fi->active_img);
set_fw_info_part(&info, &fi->img0);
if (ioread16(&si->img_running) == SWITCHTEC_IMG0_RUNNING)
info.active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_IMG1:
active_addr = ioread32(&fi->active_img);
set_fw_info_part(&info, &fi->img1);
if (ioread16(&si->img_running) == SWITCHTEC_IMG1_RUNNING)
info.active |= SWITCHTEC_IOCTL_PART_RUNNING;
break;
case SWITCHTEC_IOCTL_PART_NVLOG:
set_fw_info_part(&info, &fi->nvlog);
@ -861,7 +879,7 @@ static int ioctl_flash_part_info(struct switchtec_dev *stdev,
}
if (info.address == active_addr)
info.active = 1;
info.active |= SWITCHTEC_IOCTL_PART_ACTIVE;
if (copy_to_user(uinfo, &info, sizeof(info)))
return -EFAULT;
@ -1540,6 +1558,24 @@ static const struct pci_device_id switchtec_pci_tbl[] = {
SWITCHTEC_PCI_DEVICE(0x8544), //PSX 64xG3
SWITCHTEC_PCI_DEVICE(0x8545), //PSX 80xG3
SWITCHTEC_PCI_DEVICE(0x8546), //PSX 96xG3
SWITCHTEC_PCI_DEVICE(0x8551), //PAX 24XG3
SWITCHTEC_PCI_DEVICE(0x8552), //PAX 32XG3
SWITCHTEC_PCI_DEVICE(0x8553), //PAX 48XG3
SWITCHTEC_PCI_DEVICE(0x8554), //PAX 64XG3
SWITCHTEC_PCI_DEVICE(0x8555), //PAX 80XG3
SWITCHTEC_PCI_DEVICE(0x8556), //PAX 96XG3
SWITCHTEC_PCI_DEVICE(0x8561), //PFXL 24XG3
SWITCHTEC_PCI_DEVICE(0x8562), //PFXL 32XG3
SWITCHTEC_PCI_DEVICE(0x8563), //PFXL 48XG3
SWITCHTEC_PCI_DEVICE(0x8564), //PFXL 64XG3
SWITCHTEC_PCI_DEVICE(0x8565), //PFXL 80XG3
SWITCHTEC_PCI_DEVICE(0x8566), //PFXL 96XG3
SWITCHTEC_PCI_DEVICE(0x8571), //PFXI 24XG3
SWITCHTEC_PCI_DEVICE(0x8572), //PFXI 32XG3
SWITCHTEC_PCI_DEVICE(0x8573), //PFXI 48XG3
SWITCHTEC_PCI_DEVICE(0x8574), //PFXI 64XG3
SWITCHTEC_PCI_DEVICE(0x8575), //PFXI 80XG3
SWITCHTEC_PCI_DEVICE(0x8576), //PFXI 96XG3
{0}
};
MODULE_DEVICE_TABLE(pci, switchtec_pci_tbl);

2
drivers/video/fbdev/efifb.c
View file

@ -408,7 +408,7 @@ static void efifb_fixup_resources(struct pci_dev *dev)
if (!base)
return;
for (i = 0; i < PCI_STD_RESOURCE_END; i++) {
for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
struct resource *res = &dev->resource[i];
if (!(res->flags & IORESOURCE_MEM))

4
include/linux/interrupt.h
View file

@ -291,7 +291,7 @@ extern int
irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify);
struct cpumask *irq_create_affinity_masks(int nvec, const struct irq_affinity *affd);
int irq_calc_affinity_vectors(int maxvec, const struct irq_affinity *affd);
int irq_calc_affinity_vectors(int minvec, int maxvec, const struct irq_affinity *affd);
#else /* CONFIG_SMP */
@ -331,7 +331,7 @@ irq_create_affinity_masks(int nvec, const struct irq_affinity *affd)
}
static inline int
irq_calc_affinity_vectors(int maxvec, const struct irq_affinity *affd)
irq_calc_affinity_vectors(int minvec, int maxvec, const struct irq_affinity *affd)
{
return maxvec;
}

10
include/linux/pci-ats.h
View file

@ -7,6 +7,7 @@
int pci_enable_pri(struct pci_dev *pdev, u32 reqs);
void pci_disable_pri(struct pci_dev *pdev);
void pci_restore_pri_state(struct pci_dev *pdev);
int pci_reset_pri(struct pci_dev *pdev);
#else /* CONFIG_PCI_PRI */
@ -20,6 +21,10 @@ static inline void pci_disable_pri(struct pci_dev *pdev)
{
}
static inline void pci_restore_pri_state(struct pci_dev *pdev)
{
}
static inline int pci_reset_pri(struct pci_dev *pdev)
{
return -ENODEV;
@ -31,6 +36,7 @@ static inline int pci_reset_pri(struct pci_dev *pdev)
int pci_enable_pasid(struct pci_dev *pdev, int features);
void pci_disable_pasid(struct pci_dev *pdev);
void pci_restore_pasid_state(struct pci_dev *pdev);
int pci_pasid_features(struct pci_dev *pdev);
int pci_max_pasids(struct pci_dev *pdev);
@ -45,6 +51,10 @@ static inline void pci_disable_pasid(struct pci_dev *pdev)
{
}
static inline void pci_restore_pasid_state(struct pci_dev *pdev)
{
}
static inline int pci_pasid_features(struct pci_dev *pdev)
{
return -EINVAL;

35
include/linux/pci.h
View file

@ -360,6 +360,8 @@ struct pci_dev {
unsigned int msix_enabled:1;
unsigned int ari_enabled:1; /* ARI forwarding */
unsigned int ats_enabled:1; /* Address Translation Service */
unsigned int pasid_enabled:1; /* Process Address Space ID */
unsigned int pri_enabled:1; /* Page Request Interface */
unsigned int is_managed:1;
unsigned int needs_freset:1; /* Dev requires fundamental reset */
unsigned int state_saved:1;
@ -370,7 +372,7 @@ struct pci_dev {
unsigned int is_thunderbolt:1; /* Thunderbolt controller */
unsigned int __aer_firmware_first_valid:1;
unsigned int __aer_firmware_first:1;
unsigned int broken_intx_masking:1;
unsigned int broken_intx_masking:1; /* INTx masking can't be used */
unsigned int io_window_1k:1; /* Intel P2P bridge 1K I/O windows */
unsigned int irq_managed:1;
unsigned int has_secondary_link:1;
@ -403,6 +405,12 @@ struct pci_dev {
u16 ats_cap; /* ATS Capability offset */
u8 ats_stu; /* ATS Smallest Translation Unit */
atomic_t ats_ref_cnt; /* number of VFs with ATS enabled */
#endif
#ifdef CONFIG_PCI_PRI
u32 pri_reqs_alloc; /* Number of PRI requests allocated */
#endif
#ifdef CONFIG_PCI_PASID
u16 pasid_features;
#endif
phys_addr_t rom; /* Physical address of ROM if it's not from the BAR */
size_t romlen; /* Length of ROM if it's not from the BAR */
@ -437,6 +445,8 @@ struct pci_host_bridge {
void *sysdata;
int busnr;
struct list_head windows; /* resource_entry */
u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* platform IRQ swizzler */
int (*map_irq)(const struct pci_dev *, u8, u8);
void (*release_fn)(struct pci_host_bridge *);
void *release_data;
struct msi_controller *msi;
@ -463,7 +473,9 @@ static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)
}
struct pci_host_bridge *pci_alloc_host_bridge(size_t priv);
int pci_register_host_bridge(struct pci_host_bridge *bridge);
struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
size_t priv);
void pci_free_host_bridge(struct pci_host_bridge *bridge);
struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
@ -695,7 +707,8 @@ struct pci_error_handlers {
pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
/* PCI function reset prepare or completed */
void (*reset_notify)(struct pci_dev *dev, bool prepare);
void (*reset_prepare)(struct pci_dev *dev);
void (*reset_done)(struct pci_dev *dev);
/* Device driver may resume normal operations */
void (*resume)(struct pci_dev *dev);
@ -852,13 +865,10 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
void pci_bus_release_busn_res(struct pci_bus *b);
struct pci_bus *pci_scan_root_bus_msi(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata,
struct list_head *resources,
struct msi_controller *msi);
struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata,
struct list_head *resources);
int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge);
struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
int busnr);
void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
@ -1008,6 +1018,15 @@ int __must_check pci_reenable_device(struct pci_dev *);
int __must_check pcim_enable_device(struct pci_dev *pdev);
void pcim_pin_device(struct pci_dev *pdev);
static inline bool pci_intx_mask_supported(struct pci_dev *pdev)
{
/*
* INTx masking is supported if PCI_COMMAND_INTX_DISABLE is
* writable and no quirk has marked the feature broken.
*/
return !pdev->broken_intx_masking;
}
static inline int pci_is_enabled(struct pci_dev *pdev)
{
return (atomic_read(&pdev->enable_cnt) > 0);
@ -1031,7 +1050,6 @@ int __must_check pci_set_mwi(struct pci_dev *dev);
int pci_try_set_mwi(struct pci_dev *dev);
void pci_clear_mwi(struct pci_dev *dev);
void pci_intx(struct pci_dev *dev, int enable);
bool pci_intx_mask_supported(struct pci_dev *dev);
bool pci_check_and_mask_intx(struct pci_dev *dev);
bool pci_check_and_unmask_intx(struct pci_dev *dev);
int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
@ -1144,6 +1162,7 @@ void pdev_enable_device(struct pci_dev *);
int pci_enable_resources(struct pci_dev *, int mask);
void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
int (*)(const struct pci_dev *, u8, u8));
void pci_assign_irq(struct pci_dev *dev);
struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
#define HAVE_PCI_REQ_REGIONS 2
int __must_check pci_request_regions(struct pci_dev *, const char *);

2
include/linux/pci_ids.h
View file

@ -1373,6 +1373,8 @@
#define PCI_DEVICE_ID_TTI_HPT374 0x0008
#define PCI_DEVICE_ID_TTI_HPT372N 0x0009 /* apparently a 372N variant? */
#define PCI_VENDOR_ID_SIGMA 0x1105
#define PCI_VENDOR_ID_VIA 0x1106
#define PCI_DEVICE_ID_VIA_8763_0 0x0198
#define PCI_DEVICE_ID_VIA_8380_0 0x0204

1
include/uapi/linux/pci_regs.h
View file

@ -517,6 +517,7 @@
#define PCI_EXP_LNKCAP_SLS 0x0000000f /* Supported Link Speeds */
#define PCI_EXP_LNKCAP_SLS_2_5GB 0x00000001 /* LNKCAP2 SLS Vector bit 0 */
#define PCI_EXP_LNKCAP_SLS_5_0GB 0x00000002 /* LNKCAP2 SLS Vector bit 1 */
#define PCI_EXP_LNKCAP_SLS_8_0GB 0x00000003 /* LNKCAP2 SLS Vector bit 2 */
#define PCI_EXP_LNKCAP_MLW 0x000003f0 /* Maximum Link Width */
#define PCI_EXP_LNKCAP_ASPMS 0x00000c00 /* ASPM Support */
#define PCI_EXP_LNKCAP_L0SEL 0x00007000 /* L0s Exit Latency */

3
include/uapi/linux/switchtec_ioctl.h
View file

@ -39,6 +39,9 @@ struct switchtec_ioctl_flash_info {
__u32 padding;
};
#define SWITCHTEC_IOCTL_PART_ACTIVE 1
#define SWITCHTEC_IOCTL_PART_RUNNING 2
struct switchtec_ioctl_flash_part_info {
__u32 flash_partition;
__u32 address;

13
kernel/irq/affinity.c
View file

@ -110,6 +110,13 @@ irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd)
struct cpumask *masks;
cpumask_var_t nmsk, *node_to_present_cpumask;
/*
* If there aren't any vectors left after applying the pre/post
* vectors don't bother with assigning affinity.
*/
if (!affv)
return NULL;
if (!zalloc_cpumask_var(&nmsk, GFP_KERNEL))
return NULL;
@ -192,15 +199,19 @@ irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd)
/**
* irq_calc_affinity_vectors - Calculate the optimal number of vectors
* @minvec: The minimum number of vectors available
* @maxvec: The maximum number of vectors available
* @affd: Description of the affinity requirements
*/
int irq_calc_affinity_vectors(int maxvec, const struct irq_affinity *affd)
int irq_calc_affinity_vectors(int minvec, int maxvec, const struct irq_affinity *affd)
{
int resv = affd->pre_vectors + affd->post_vectors;
int vecs = maxvec - resv;
int ret;
if (resv > minvec)
return 0;
get_online_cpus();
ret = min_t(int, cpumask_weight(cpu_present_mask), vecs) + resv;
put_online_cpus();