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PCI changes for the v3.19 merge window: 

NUMA
     - Allow numa_node override via sysfs (Prarit Bhargava)
 
   Resource management
     - Restore detection of read-only BARs (Myron Stowe)
     - Shrink decoding-disabled window while sizing BARs (Myron Stowe)
     - Add informational printk for invalid BARs (Myron Stowe)
     - Remove fixed parameter in pci_iov_resource_bar() (Myron Stowe)
 
   MSI
     - Add pci_msi_ignore_mask to prevent writes to MSI/MSI-X Mask Bits (Yijing Wang)
     - Revert "PCI: Add x86_msi.msi_mask_irq() and msix_mask_irq()" (Yijing Wang)
     - s390/MSI: Use __msi_mask_irq() instead of default_msi_mask_irq() (Yijing Wang)
 
   Virtualization
     - xen: Process failure for pcifront_(re)scan_root() (Chen Gang)
     - Make FLR and AF FLR reset warning messages different (Gavin Shan)
 
   Generic host bridge driver
     - Allocate config space windows after limiting bus number range (Lorenzo Pieralisi)
     - Convert to DT resource parsing API (Lorenzo Pieralisi)
 
   Freescale Layerscape
     - Add Freescale Layerscape PCIe driver (Minghuan Lian)
 
   NVIDIA Tegra
     - Do not build on 64-bit ARM (Thierry Reding)
     - Add Kconfig help text (Thierry Reding)
 
   Renesas R-Car
     - Make rcar_pci static (Jingoo Han)
 
   Samsung Exynos
     - Add exynos prefix to add_pcie_port(), pcie_init() (Jingoo Han)
 
   ST Microelectronics SPEAr13xx
     - Add spear prefix to add_pcie_port(), pcie_init() (Jingoo Han)
     - Make spear13xx_add_pcie_port() __init (Jingoo Han)
     - Remove unnecessary OOM message (Jingoo Han)
 
   TI DRA7xx
     - Add dra7xx prefix to add_pcie_port() (Jingoo Han)
     - Make dra7xx_add_pcie_port() __init (Jingoo Han)
 
   TI Keystone
     - Make ks_dw_pcie_msi_domain_ops static (Jingoo Han)
     - Remove unnecessary OOM message (Jingoo Han)
 
   Miscellaneous
     - Delete unnecessary NULL pointer checks (Markus Elfring)
     - Remove unused to_hotplug_slot() (Gavin Shan)
     - Whitespace cleanup (Jingoo Han)
     - Simplify if-return sequences (Quentin Lambert)
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Merge tag 'pci-v3.19-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI changes from Bjorn Helgaas:
 "Here are the PCI changes intended for v3.19.  I don't think there's
  anything very exciting here, but there was a lot of MSI-related stuff
  coming via Thomas.

  Details:

  NUMA
    - Allow numa_node override via sysfs (Prarit Bhargava)

  Resource management
    - Restore detection of read-only BARs (Myron Stowe)
    - Shrink decoding-disabled window while sizing BARs (Myron Stowe)
    - Add informational printk for invalid BARs (Myron Stowe)
    - Remove fixed parameter in pci_iov_resource_bar() (Myron Stowe)

  MSI
    - Add pci_msi_ignore_mask to prevent writes to MSI/MSI-X Mask Bits (Yijing Wang)
    - Revert "PCI: Add x86_msi.msi_mask_irq() and msix_mask_irq()" (Yijing Wang)
    - s390/MSI: Use __msi_mask_irq() instead of default_msi_mask_irq() (Yijing Wang)

  Virtualization
    - xen: Process failure for pcifront_(re)scan_root() (Chen Gang)
    - Make FLR and AF FLR reset warning messages different (Gavin Shan)

  Generic host bridge driver
    - Allocate config space windows after limiting bus number range (Lorenzo Pieralisi)
    - Convert to DT resource parsing API (Lorenzo Pieralisi)

  Freescale Layerscape
    - Add Freescale Layerscape PCIe driver (Minghuan Lian)

  NVIDIA Tegra
    - Do not build on 64-bit ARM (Thierry Reding)
    - Add Kconfig help text (Thierry Reding)

  Renesas R-Car
    - Make rcar_pci static (Jingoo Han)

  Samsung Exynos
    - Add exynos prefix to add_pcie_port(), pcie_init() (Jingoo Han)

  ST Microelectronics SPEAr13xx
    - Add spear prefix to add_pcie_port(), pcie_init() (Jingoo Han)
    - Make spear13xx_add_pcie_port() __init (Jingoo Han)
    - Remove unnecessary OOM message (Jingoo Han)

  TI DRA7xx
    - Add dra7xx prefix to add_pcie_port() (Jingoo Han)
    - Make dra7xx_add_pcie_port() __init (Jingoo Han)

  TI Keystone
    - Make ks_dw_pcie_msi_domain_ops static (Jingoo Han)
    - Remove unnecessary OOM message (Jingoo Han)

  Miscellaneous
    - Delete unnecessary NULL pointer checks (Markus Elfring)
    - Remove unused to_hotplug_slot() (Gavin Shan)
    - Whitespace cleanup (Jingoo Han)
    - Simplify if-return sequences (Quentin Lambert)"

* tag 'pci-v3.19-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (28 commits)
  PCI: Remove fixed parameter in pci_iov_resource_bar()
  PCI: Add informational printk for invalid BARs
  PCI: tegra: Add Kconfig help text
  PCI: tegra: Do not build on 64-bit ARM
  PCI: spear: Remove unnecessary OOM message
  PCI: mvebu: Add a blank line after declarations
  PCI: designware: Add a blank line after declarations
  PCI: exynos: Remove unnecessary return statement
  PCI: imx6: Use tabs for indentation
  PCI: keystone: Remove unnecessary OOM message
  PCI: Remove unused and broken to_hotplug_slot()
  PCI: Make FLR and AF FLR reset warning messages different
  PCI: dra7xx: Add __init annotation to dra7xx_add_pcie_port()
  PCI: spear: Add __init annotation to spear13xx_add_pcie_port()
  PCI: spear: Rename add_pcie_port(), pcie_init() to spear13xx_add_pcie_port(), etc.
  PCI: dra7xx: Rename add_pcie_port() to dra7xx_add_pcie_port()
  PCI: layerscape: Add Freescale Layerscape PCIe driver
  PCI: Simplify if-return sequences
  PCI: Delete unnecessary NULL pointer checks
  PCI: Shrink decoding-disabled window while sizing BARs
  ...
This commit is contained in:
Linus Torvalds 2014-12-10 20:58:52 -08:00
parent f74ea36848 149792795d
commit c75059c462
26 changed files with 396 additions and 211 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
Documentation/ABI/testing/sysfs-bus-pci
View File

@ -281,3 +281,16 @@ Description:
opt-out of driver binding using a driver_override name such as
"none". Only a single driver may be specified in the override,
there is no support for parsing delimiters.
What: /sys/bus/pci/devices/.../numa_node
Date: Oct 2014
Contact: Prarit Bhargava <prarit@redhat.com>
Description:
This file contains the NUMA node to which the PCI device is
attached, or -1 if the node is unknown. The initial value
comes from an ACPI _PXM method or a similar firmware
source. If that is missing or incorrect, this file can be
written to override the node. In that case, please report
a firmware bug to the system vendor. Writing to this file
taints the kernel with TAINT_FIRMWARE_WORKAROUND, which
reduces the supportability of your system.

42
Documentation/devicetree/bindings/pci/layerscape-pci.txt Normal file
View File

@ -0,0 +1,42 @@
Freescale Layerscape PCIe controller
This PCIe host controller is based on the Synopsis Designware PCIe IP
and thus inherits all the common properties defined in designware-pcie.txt.
Required properties:
- compatible: should contain the platform identifier such as "fsl,ls1021a-pcie"
- reg: base addresses and lengths of the PCIe controller
- interrupts: A list of interrupt outputs of the controller. Must contain an
entry for each entry in the interrupt-names property.
- interrupt-names: Must include the following entries:
"intr": The interrupt that is asserted for controller interrupts
- fsl,pcie-scfg: Must include two entries.
The first entry must be a link to the SCFG device node
The second entry must be '0' or '1' based on physical PCIe controller index.
This is used to get SCFG PEXN registers
Example:
pcie@3400000 {
compatible = "fsl,ls1021a-pcie", "snps,dw-pcie";
reg = <0x00 0x03400000 0x0 0x00010000 /* controller registers */
0x40 0x00000000 0x0 0x00002000>; /* configuration space */
reg-names = "regs", "config";
interrupts = <GIC_SPI 177 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
interrupt-names = "intr";
fsl,pcie-scfg = <&scfg 0>;
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
num-lanes = <4>;
bus-range = <0x0 0xff>;
ranges = <0x81000000 0x0 0x00000000 0x40 0x00010000 0x0 0x00010000 /* downstream I/O */
0xc2000000 0x0 0x20000000 0x40 0x20000000 0x0 0x20000000 /* prefetchable memory */
0x82000000 0x0 0x40000000 0x40 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 7>;
interrupt-map = <0000 0 0 1 &gic GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>,
<0000 0 0 2 &gic GIC_SPI 188 IRQ_TYPE_LEVEL_HIGH>,
<0000 0 0 3 &gic GIC_SPI 190 IRQ_TYPE_LEVEL_HIGH>,
<0000 0 0 4 &gic GIC_SPI 192 IRQ_TYPE_LEVEL_HIGH>;
};

10
MAINTAINERS
View File

@ -7086,6 +7086,16 @@ S: Maintained
F: Documentation/devicetree/bindings/pci/xgene-pci.txt
F: drivers/pci/host/pci-xgene.c
PCI DRIVER FOR FREESCALE LAYERSCAPE
M: Minghuan Lian <minghuan.Lian@freescale.com>
M: Mingkai Hu <mingkai.hu@freescale.com>
M: Roy Zang <tie-fei.zang@freescale.com>
L: linuxppc-dev@lists.ozlabs.org
L: linux-pci@vger.kernel.org
L: linux-arm-kernel@lists.infradead.org
S: Maintained
F: drivers/pci/host/*layerscape*
PCI DRIVER FOR IMX6
M: Richard Zhu <r65037@freescale.com>
M: Lucas Stach <l.stach@pengutronix.de>

13
drivers/pci/host/Kconfig
View File

@ -32,7 +32,10 @@ config PCI_IMX6
config PCI_TEGRA
bool "NVIDIA Tegra PCIe controller"
depends on ARCH_TEGRA
depends on ARCH_TEGRA && !ARM64
help
Say Y here if you want support for the PCIe host controller found
on NVIDIA Tegra SoCs.
config PCI_RCAR_GEN2
bool "Renesas R-Car Gen2 Internal PCI controller"
@ -91,4 +94,12 @@ config PCI_XGENE
There are 5 internal PCIe ports available. Each port is GEN3 capable
and have varied lanes from x1 to x8.
config PCI_LAYERSCAPE
bool "Freescale Layerscape PCIe controller"
depends on OF && ARM
select PCIE_DW
select MFD_SYSCON
help
Say Y here if you want PCIe controller support on Layerscape SoCs.
endmenu

1
drivers/pci/host/Makefile
View File

@ -11,3 +11,4 @@ obj-$(CONFIG_PCIE_SPEAR13XX) += pcie-spear13xx.o
obj-$(CONFIG_PCI_KEYSTONE) += pci-keystone-dw.o pci-keystone.o
obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx.o
obj-$(CONFIG_PCI_XGENE) += pci-xgene.o
obj-$(CONFIG_PCI_LAYERSCAPE) += pci-layerscape.o

6
drivers/pci/host/pci-dra7xx.c
View File

@ -270,8 +270,8 @@ static irqreturn_t dra7xx_pcie_irq_handler(int irq, void *arg)
return IRQ_HANDLED;
}
static int add_pcie_port(struct dra7xx_pcie *dra7xx,
struct platform_device *pdev)
static int __init dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx,
struct platform_device *pdev)
{
int ret;
struct pcie_port *pp;
@ -398,7 +398,7 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, dra7xx);
ret = add_pcie_port(dra7xx, pdev);
ret = dra7xx_add_pcie_port(dra7xx, pdev);
if (ret < 0)
goto err_add_port;

18
drivers/pci/host/pci-exynos.c
View File

@ -312,7 +312,6 @@ static void exynos_pcie_assert_reset(struct pcie_port *pp)
if (exynos_pcie->reset_gpio >= 0)
devm_gpio_request_one(pp->dev, exynos_pcie->reset_gpio,
GPIOF_OUT_INIT_HIGH, "RESET");
return;
}
static int exynos_pcie_establish_link(struct pcie_port *pp)
@ -388,7 +387,6 @@ static void exynos_pcie_clear_irq_pulse(struct pcie_port *pp)
val = exynos_elb_readl(exynos_pcie, PCIE_IRQ_PULSE);
exynos_elb_writel(exynos_pcie, val, PCIE_IRQ_PULSE);
return;
}
static void exynos_pcie_enable_irq_pulse(struct pcie_port *pp)
@ -400,7 +398,6 @@ static void exynos_pcie_enable_irq_pulse(struct pcie_port *pp)
val = IRQ_INTA_ASSERT | IRQ_INTB_ASSERT |
IRQ_INTC_ASSERT | IRQ_INTD_ASSERT,
exynos_elb_writel(exynos_pcie, val, PCIE_IRQ_EN_PULSE);
return;
}
static irqreturn_t exynos_pcie_irq_handler(int irq, void *arg)
@ -429,7 +426,6 @@ static void exynos_pcie_msi_init(struct pcie_port *pp)
val = exynos_elb_readl(exynos_pcie, PCIE_IRQ_EN_LEVEL);
val |= IRQ_MSI_ENABLE;
exynos_elb_writel(exynos_pcie, val, PCIE_IRQ_EN_LEVEL);
return;
}
static void exynos_pcie_enable_interrupts(struct pcie_port *pp)
@ -438,8 +434,6 @@ static void exynos_pcie_enable_interrupts(struct pcie_port *pp)
if (IS_ENABLED(CONFIG_PCI_MSI))
exynos_pcie_msi_init(pp);
return;
}
static inline void exynos_pcie_readl_rc(struct pcie_port *pp,
@ -448,7 +442,6 @@ static inline void exynos_pcie_readl_rc(struct pcie_port *pp,
exynos_pcie_sideband_dbi_r_mode(pp, true);
*val = readl(dbi_base);
exynos_pcie_sideband_dbi_r_mode(pp, false);
return;
}
static inline void exynos_pcie_writel_rc(struct pcie_port *pp,
@ -457,7 +450,6 @@ static inline void exynos_pcie_writel_rc(struct pcie_port *pp,
exynos_pcie_sideband_dbi_w_mode(pp, true);
writel(val, dbi_base);
exynos_pcie_sideband_dbi_w_mode(pp, false);
return;
}
static int exynos_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
@ -509,8 +501,8 @@ static struct pcie_host_ops exynos_pcie_host_ops = {
.host_init = exynos_pcie_host_init,
};
static int __init add_pcie_port(struct pcie_port *pp,
struct platform_device *pdev)
static int __init exynos_add_pcie_port(struct pcie_port *pp,
struct platform_device *pdev)
{
int ret;
@ -615,7 +607,7 @@ static int __init exynos_pcie_probe(struct platform_device *pdev)
goto fail_bus_clk;
}
ret = add_pcie_port(pp, pdev);
ret = exynos_add_pcie_port(pp, pdev);
if (ret < 0)
goto fail_bus_clk;
@ -656,11 +648,11 @@ static struct platform_driver exynos_pcie_driver = {
/* Exynos PCIe driver does not allow module unload */
static int __init pcie_init(void)
static int __init exynos_pcie_init(void)
{
return platform_driver_probe(&exynos_pcie_driver, exynos_pcie_probe);
}
subsys_initcall(pcie_init);
subsys_initcall(exynos_pcie_init);
MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
MODULE_DESCRIPTION("Samsung PCIe host controller driver");

126
drivers/pci/host/pci-host-generic.c
View File

@ -32,7 +32,7 @@ struct gen_pci_cfg_bus_ops {
struct gen_pci_cfg_windows {
struct resource res;
struct resource bus_range;
struct resource *bus_range;
void __iomem **win;
const struct gen_pci_cfg_bus_ops *ops;
@ -50,7 +50,7 @@ static void __iomem *gen_pci_map_cfg_bus_cam(struct pci_bus *bus,
{
struct pci_sys_data *sys = bus->sysdata;
struct gen_pci *pci = sys->private_data;
resource_size_t idx = bus->number - pci->cfg.bus_range.start;
resource_size_t idx = bus->number - pci->cfg.bus_range->start;
return pci->cfg.win[idx] + ((devfn << 8) | where);
}
@ -66,7 +66,7 @@ static void __iomem *gen_pci_map_cfg_bus_ecam(struct pci_bus *bus,
{
struct pci_sys_data *sys = bus->sysdata;
struct gen_pci *pci = sys->private_data;
resource_size_t idx = bus->number - pci->cfg.bus_range.start;
resource_size_t idx = bus->number - pci->cfg.bus_range->start;
return pci->cfg.win[idx] + ((devfn << 12) | where);
}
@ -138,106 +138,50 @@ static const struct of_device_id gen_pci_of_match[] = {
};
MODULE_DEVICE_TABLE(of, gen_pci_of_match);
static int gen_pci_calc_io_offset(struct device *dev,
struct of_pci_range *range,
struct resource *res,
resource_size_t *offset)
{
static atomic_t wins = ATOMIC_INIT(0);
int err, idx, max_win;
unsigned int window;
if (!PAGE_ALIGNED(range->cpu_addr))
return -EINVAL;
max_win = (IO_SPACE_LIMIT + 1) / SZ_64K;
idx = atomic_inc_return(&wins);
if (idx > max_win)
return -ENOSPC;
window = (idx - 1) * SZ_64K;
err = pci_ioremap_io(window, range->cpu_addr);
if (err)
return err;
of_pci_range_to_resource(range, dev->of_node, res);
res->start = window;
res->end = res->start + range->size - 1;
*offset = window - range->pci_addr;
return 0;
}
static int gen_pci_calc_mem_offset(struct device *dev,
struct of_pci_range *range,
struct resource *res,
resource_size_t *offset)
{
of_pci_range_to_resource(range, dev->of_node, res);
*offset = range->cpu_addr - range->pci_addr;
return 0;
}
static void gen_pci_release_of_pci_ranges(struct gen_pci *pci)
{
struct pci_host_bridge_window *win;
list_for_each_entry(win, &pci->resources, list)
release_resource(win->res);
pci_free_resource_list(&pci->resources);
}
static int gen_pci_parse_request_of_pci_ranges(struct gen_pci *pci)
{
struct of_pci_range range;
struct of_pci_range_parser parser;
int err, res_valid = 0;
struct device *dev = pci->host.dev.parent;
struct device_node *np = dev->of_node;
resource_size_t iobase;
struct pci_host_bridge_window *win;
if (of_pci_range_parser_init(&parser, np)) {
dev_err(dev, "missing \"ranges\" property\n");
return -EINVAL;
}
err = of_pci_get_host_bridge_resources(np, 0, 0xff, &pci->resources,
&iobase);
if (err)
return err;
for_each_of_pci_range(&parser, &range) {
struct resource *parent, *res;
resource_size_t offset;
u32 restype = range.flags & IORESOURCE_TYPE_BITS;
list_for_each_entry(win, &pci->resources, list) {
struct resource *parent, *res = win->res;
res = devm_kmalloc(dev, sizeof(*res), GFP_KERNEL);
if (!res) {
err = -ENOMEM;
goto out_release_res;
}
switch (restype) {
switch (resource_type(res)) {
case IORESOURCE_IO:
parent = &ioport_resource;
err = gen_pci_calc_io_offset(dev, &range, res, &offset);
err = pci_remap_iospace(res, iobase);
if (err) {
dev_warn(dev, "error %d: failed to map resource %pR\n",
err, res);
continue;
}
break;
case IORESOURCE_MEM:
parent = &iomem_resource;
err = gen_pci_calc_mem_offset(dev, &range, res, &offset);
res_valid |= !(res->flags & IORESOURCE_PREFETCH || err);
res_valid |= !(res->flags & IORESOURCE_PREFETCH);
break;
case IORESOURCE_BUS:
pci->cfg.bus_range = res;
default:
err = -EINVAL;
continue;
}
if (err) {
dev_warn(dev,
"error %d: failed to add resource [type 0x%x, %lld bytes]\n",
err, restype, range.size);
continue;
}
err = request_resource(parent, res);
err = devm_request_resource(dev, parent, res);
if (err)
goto out_release_res;
pci_add_resource_offset(&pci->resources, res, offset);
}
if (!res_valid) {
@ -262,38 +206,30 @@ static int gen_pci_parse_map_cfg_windows(struct gen_pci *pci)
struct device *dev = pci->host.dev.parent;
struct device_node *np = dev->of_node;
if (of_pci_parse_bus_range(np, &pci->cfg.bus_range))
pci->cfg.bus_range = (struct resource) {
.name = np->name,
.start = 0,
.end = 0xff,
.flags = IORESOURCE_BUS,
};
err = of_address_to_resource(np, 0, &pci->cfg.res);
if (err) {
dev_err(dev, "missing \"reg\" property\n");
return err;
}
pci->cfg.win = devm_kcalloc(dev, resource_size(&pci->cfg.bus_range),
/* Limit the bus-range to fit within reg */
bus_max = pci->cfg.bus_range->start +
(resource_size(&pci->cfg.res) >> pci->cfg.ops->bus_shift) - 1;
pci->cfg.bus_range->end = min_t(resource_size_t,
pci->cfg.bus_range->end, bus_max);
pci->cfg.win = devm_kcalloc(dev, resource_size(pci->cfg.bus_range),
sizeof(*pci->cfg.win), GFP_KERNEL);
if (!pci->cfg.win)
return -ENOMEM;
/* Limit the bus-range to fit within reg */
bus_max = pci->cfg.bus_range.start +
(resource_size(&pci->cfg.res) >> pci->cfg.ops->bus_shift) - 1;
pci->cfg.bus_range.end = min_t(resource_size_t, pci->cfg.bus_range.end,
bus_max);
/* Map our Configuration Space windows */
if (!devm_request_mem_region(dev, pci->cfg.res.start,
resource_size(&pci->cfg.res),
"Configuration Space"))
return -ENOMEM;
bus_range = &pci->cfg.bus_range;
bus_range = pci->cfg.bus_range;
for (busn = bus_range->start; busn <= bus_range->end; ++busn) {
u32 idx = busn - bus_range->start;
u32 sz = 1 << pci->cfg.ops->bus_shift;
@ -305,8 +241,6 @@ static int gen_pci_parse_map_cfg_windows(struct gen_pci *pci)
return -ENOMEM;
}
/* Register bus resource */
pci_add_resource(&pci->resources, bus_range);
return 0;
}

4
drivers/pci/host/pci-imx6.c
View File

@ -533,8 +533,8 @@ static int __init imx6_add_pcie_port(struct pcie_port *pp,
}
ret = devm_request_irq(&pdev->dev, pp->msi_irq,
imx6_pcie_msi_handler,
IRQF_SHARED, "mx6-pcie-msi", pp);
imx6_pcie_msi_handler,
IRQF_SHARED, "mx6-pcie-msi", pp);
if (ret) {
dev_err(&pdev->dev, "failed to request MSI irq\n");
return -ENODEV;

2
drivers/pci/host/pci-keystone-dw.c
View File

@ -201,7 +201,7 @@ static int ks_dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
return 0;
}
const struct irq_domain_ops ks_dw_pcie_msi_domain_ops = {
static const struct irq_domain_ops ks_dw_pcie_msi_domain_ops = {
.map = ks_dw_pcie_msi_map,
};

5
drivers/pci/host/pci-keystone.c
View File

@ -353,10 +353,9 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
ks_pcie = devm_kzalloc(&pdev->dev, sizeof(*ks_pcie),
GFP_KERNEL);
if (!ks_pcie) {
dev_err(dev, "no memory for keystone pcie\n");
if (!ks_pcie)
return -ENOMEM;
}
pp = &ks_pcie->pp;
/* initialize SerDes Phy if present */

179
drivers/pci/host/pci-layerscape.c Normal file
View File

@ -0,0 +1,179 @@
/*
* PCIe host controller driver for Freescale Layerscape SoCs
*
* Copyright (C) 2014 Freescale Semiconductor.
*
* Author: Minghuan Lian <Minghuan.Lian@freescale.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 <linux/kernel.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of_pci.h>
#include <linux/of_platform.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/resource.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include "pcie-designware.h"
/* PEX1/2 Misc Ports Status Register */
#define SCFG_PEXMSCPORTSR(pex_idx) (0x94 + (pex_idx) * 4)
#define LTSSM_STATE_SHIFT 20
#define LTSSM_STATE_MASK 0x3f
#define LTSSM_PCIE_L0 0x11 /* L0 state */
/* Symbol Timer Register and Filter Mask Register 1 */
#define PCIE_STRFMR1 0x71c
struct ls_pcie {
struct list_head node;
struct device *dev;
struct pci_bus *bus;
void __iomem *dbi;
struct regmap *scfg;
struct pcie_port pp;
int index;
int msi_irq;
};
#define to_ls_pcie(x) container_of(x, struct ls_pcie, pp)
static int ls_pcie_link_up(struct pcie_port *pp)
{
u32 state;
struct ls_pcie *pcie = to_ls_pcie(pp);
regmap_read(pcie->scfg, SCFG_PEXMSCPORTSR(pcie->index), &state);
state = (state >> LTSSM_STATE_SHIFT) & LTSSM_STATE_MASK;
if (state < LTSSM_PCIE_L0)
return 0;
return 1;
}
static void ls_pcie_host_init(struct pcie_port *pp)
{
struct ls_pcie *pcie = to_ls_pcie(pp);
int count = 0;
u32 val;
dw_pcie_setup_rc(pp);
while (!ls_pcie_link_up(pp)) {
usleep_range(100, 1000);
count++;
if (count >= 200) {
dev_err(pp->dev, "phy link never came up\n");
return;
}
}
/*
* LS1021A Workaround for internal TKT228622
* to fix the INTx hang issue
*/
val = ioread32(pcie->dbi + PCIE_STRFMR1);
val &= 0xffff;
iowrite32(val, pcie->dbi + PCIE_STRFMR1);
}
static struct pcie_host_ops ls_pcie_host_ops = {
.link_up = ls_pcie_link_up,
.host_init = ls_pcie_host_init,
};
static int ls_add_pcie_port(struct ls_pcie *pcie)
{
struct pcie_port *pp;
int ret;
pp = &pcie->pp;
pp->dev = pcie->dev;
pp->dbi_base = pcie->dbi;
pp->root_bus_nr = -1;
pp->ops = &ls_pcie_host_ops;
ret = dw_pcie_host_init(pp);
if (ret) {
dev_err(pp->dev, "failed to initialize host\n");
return ret;
}
return 0;
}
static int __init ls_pcie_probe(struct platform_device *pdev)
{
struct ls_pcie *pcie;
struct resource *dbi_base;
u32 index[2];
int ret;
pcie = devm_kzalloc(&pdev->dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
return -ENOMEM;
pcie->dev = &pdev->dev;
dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
if (!dbi_base) {
dev_err(&pdev->dev, "missing *regs* space\n");
return -ENODEV;
}
pcie->dbi = devm_ioremap_resource(&pdev->dev, dbi_base);
if (IS_ERR(pcie->dbi))
return PTR_ERR(pcie->dbi);
pcie->scfg = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
"fsl,pcie-scfg");
if (IS_ERR(pcie->scfg)) {
dev_err(&pdev->dev, "No syscfg phandle specified\n");
return PTR_ERR(pcie->scfg);
}
ret = of_property_read_u32_array(pdev->dev.of_node,
"fsl,pcie-scfg", index, 2);
if (ret)
return ret;
pcie->index = index[1];
ret = ls_add_pcie_port(pcie);
if (ret < 0)
return ret;
platform_set_drvdata(pdev, pcie);
return 0;
}
static const struct of_device_id ls_pcie_of_match[] = {
{ .compatible = "fsl,ls1021a-pcie" },
{ },
};
MODULE_DEVICE_TABLE(of, ls_pcie_of_match);
static struct platform_driver ls_pcie_driver = {
.driver = {
.name = "layerscape-pcie",
.owner = THIS_MODULE,
.of_match_table = ls_pcie_of_match,
},
};
module_platform_driver_probe(ls_pcie_driver, ls_pcie_probe);
MODULE_AUTHOR("Minghuan Lian <Minghuan.Lian@freescale.com>");
MODULE_DESCRIPTION("Freescale Layerscape PCIe host controller driver");
MODULE_LICENSE("GPL v2");

2
drivers/pci/host/pci-mvebu.c
View File

@ -622,6 +622,7 @@ static struct mvebu_pcie_port *mvebu_pcie_find_port(struct mvebu_pcie *pcie,
for (i = 0; i < pcie->nports; i++) {
struct mvebu_pcie_port *port = &pcie->ports[i];
if (bus->number == 0 && port->devfn == devfn)
return port;
if (bus->number != 0 &&
@ -751,6 +752,7 @@ static int mvebu_pcie_setup(int nr, struct pci_sys_data *sys)
for (i = 0; i < pcie->nports; i++) {
struct mvebu_pcie_port *port = &pcie->ports[i];
if (!port->base)
continue;
mvebu_pcie_setup_hw(port);

1
drivers/pci/host/pcie-designware.c
View File

@ -380,6 +380,7 @@ int __init dw_pcie_host_init(struct pcie_port *pp)
/* Get the I/O and memory ranges from DT */
for_each_of_pci_range(&parser, &range) {
unsigned long restype = range.flags & IORESOURCE_TYPE_BITS;
if (restype == IORESOURCE_IO) {
of_pci_range_to_resource(&range, np, &pp->io);
pp->io.name = "I/O";

2
drivers/pci/host/pcie-rcar.c
View File

@ -380,7 +380,7 @@ static int rcar_pcie_setup(int nr, struct pci_sys_data *sys)
return 1;
}
struct hw_pci rcar_pci = {
static struct hw_pci rcar_pci = {
.setup = rcar_pcie_setup,
.map_irq = of_irq_parse_and_map_pci,
.ops = &rcar_pcie_ops,

13
drivers/pci/host/pcie-spear13xx.c
View File

@ -269,7 +269,8 @@ static struct pcie_host_ops spear13xx_pcie_host_ops = {
.host_init = spear13xx_pcie_host_init,
};
static int add_pcie_port(struct pcie_port *pp, struct platform_device *pdev)
static int __init spear13xx_add_pcie_port(struct pcie_port *pp,
struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
int ret;
@ -308,10 +309,8 @@ static int __init spear13xx_pcie_probe(struct platform_device *pdev)
int ret;
spear13xx_pcie = devm_kzalloc(dev, sizeof(*spear13xx_pcie), GFP_KERNEL);
if (!spear13xx_pcie) {
dev_err(dev, "no memory for SPEAr13xx pcie\n");
if (!spear13xx_pcie)
return -ENOMEM;
}
spear13xx_pcie->phy = devm_phy_get(dev, "pcie-phy");
if (IS_ERR(spear13xx_pcie->phy)) {
@ -352,7 +351,7 @@ static int __init spear13xx_pcie_probe(struct platform_device *pdev)
if (of_property_read_bool(np, "st,pcie-is-gen1"))
spear13xx_pcie->is_gen1 = true;
ret = add_pcie_port(pp, pdev);
ret = spear13xx_add_pcie_port(pp, pdev);
if (ret < 0)
goto fail_clk;
@ -382,11 +381,11 @@ static struct platform_driver spear13xx_pcie_driver __initdata = {
/* SPEAr13xx PCIe driver does not allow module unload */
static int __init pcie_init(void)
static int __init spear13xx_pcie_init(void)
{
return platform_driver_register(&spear13xx_pcie_driver);
}
module_init(pcie_init);
module_init(spear13xx_pcie_init);
MODULE_DESCRIPTION("ST Microelectronics SPEAr13xx PCIe host controller driver");
MODULE_AUTHOR("Pratyush Anand <pratyush.anand@st.com>");

5
drivers/pci/hotplug/ibmphp_res.c
View File

@ -376,10 +376,7 @@ int __init ibmphp_rsrc_init (void)
if (rc)
return rc;
}
rc = once_over (); /* This is to align ranges (so no -1) */
if (rc)
return rc;
return 0;
return once_over (); /* This is to align ranges (so no -1) */
}
/********************************************************************************

11
drivers/pci/iov.c
View File

@ -479,20 +479,16 @@ void pci_iov_release(struct pci_dev *dev)
* pci_iov_resource_bar - get position of the SR-IOV BAR
* @dev: the PCI device
* @resno: the resource number
* @type: the BAR type to be filled in
*
* Returns position of the BAR encapsulated in the SR-IOV capability.
*/
int pci_iov_resource_bar(struct pci_dev *dev, int resno,
enum pci_bar_type *type)
int pci_iov_resource_bar(struct pci_dev *dev, int resno)
{
if (resno < PCI_IOV_RESOURCES || resno > PCI_IOV_RESOURCE_END)
return 0;
BUG_ON(!dev->is_physfn);
*type = pci_bar_unknown;
return dev->sriov->pos + PCI_SRIOV_BAR +
4 * (resno - PCI_IOV_RESOURCES);
}
@ -510,13 +506,12 @@ int pci_iov_resource_bar(struct pci_dev *dev, int resno,
resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno)
{
struct resource tmp;
enum pci_bar_type type;
int reg = pci_iov_resource_bar(dev, resno, &type);
int reg = pci_iov_resource_bar(dev, resno);
if (!reg)
return 0;
__pci_read_base(dev, type, &tmp, reg);
__pci_read_base(dev, pci_bar_unknown, &tmp, reg);
return resource_alignment(&tmp);
}

3
drivers/pci/pci-acpi.c
View File

@ -322,8 +322,7 @@ static void pci_acpi_wake_dev(struct work_struct *work)
pci_wakeup_event(pci_dev);
pm_runtime_resume(&pci_dev->dev);
if (pci_dev->subordinate)
pci_pme_wakeup_bus(pci_dev->subordinate);
pci_pme_wakeup_bus(pci_dev->subordinate);
}
/**

27
drivers/pci/pci-sysfs.c
View File

@ -221,12 +221,37 @@ static ssize_t enable_show(struct device *dev, struct device_attribute *attr,
static DEVICE_ATTR_RW(enable);
#ifdef CONFIG_NUMA
static ssize_t numa_node_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct pci_dev *pdev = to_pci_dev(dev);
int node, ret;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
ret = kstrtoint(buf, 0, &node);
if (ret)
return ret;
if (!node_online(node))
return -EINVAL;
add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
dev_alert(&pdev->dev, FW_BUG "Overriding NUMA node to %d. Contact your vendor for updates.",
node);
dev->numa_node = node;
return count;
}
static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%d\n", dev->numa_node);
}
static DEVICE_ATTR_RO(numa_node);
static DEVICE_ATTR_RW(numa_node);
#endif
static ssize_t dma_mask_bits_show(struct device *dev,

21
drivers/pci/pci.c
View File

@ -1012,11 +1012,7 @@ int pci_save_state(struct pci_dev *dev)
if (i != 0)
return i;
i = pci_save_vc_state(dev);
if (i != 0)
return i;
return 0;
return pci_save_vc_state(dev);
}
EXPORT_SYMBOL(pci_save_state);
@ -3144,12 +3140,10 @@ static int pcie_flr(struct pci_dev *dev, int probe)
return 0;
if (!pci_wait_for_pending_transaction(dev))
dev_err(&dev->dev, "transaction is not cleared; proceeding with reset anyway\n");
dev_err(&dev->dev, "timed out waiting for pending transaction; performing function level reset anyway\n");
pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
msleep(100);
return 0;
}
@ -3174,16 +3168,12 @@ static int pci_af_flr(struct pci_dev *dev, int probe)
* is used, so we use the conrol offset rather than status and shift
* the test bit to match.
*/
if (pci_wait_for_pending(dev, pos + PCI_AF_CTRL,
if (!pci_wait_for_pending(dev, pos + PCI_AF_CTRL,
PCI_AF_STATUS_TP << 8))
goto clear;
dev_err(&dev->dev, "timed out waiting for pending transaction; performing AF function level reset anyway\n");
dev_err(&dev->dev, "transaction is not cleared; proceeding with reset anyway\n");
clear:
pci_write_config_byte(dev, pos + PCI_AF_CTRL, PCI_AF_CTRL_FLR);
msleep(100);
return 0;
}
@ -4180,7 +4170,8 @@ int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type)
return dev->rom_base_reg;
} else if (resno < PCI_BRIDGE_RESOURCES) {
/* device specific resource */
reg = pci_iov_resource_bar(dev, resno, type);
*type = pci_bar_unknown;
reg = pci_iov_resource_bar(dev, resno);
if (reg)
return reg;
}

6
drivers/pci/pci.h
View File

@ -253,8 +253,7 @@ static inline void pci_restore_ats_state(struct pci_dev *dev)
#ifdef CONFIG_PCI_IOV
int pci_iov_init(struct pci_dev *dev);
void pci_iov_release(struct pci_dev *dev);
int pci_iov_resource_bar(struct pci_dev *dev, int resno,
enum pci_bar_type *type);
int pci_iov_resource_bar(struct pci_dev *dev, int resno);
resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
void pci_restore_iov_state(struct pci_dev *dev);
int pci_iov_bus_range(struct pci_bus *bus);
@ -268,8 +267,7 @@ static inline void pci_iov_release(struct pci_dev *dev)
{
}
static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno,
enum pci_bar_type *type)
static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno)
{
return 0;
}

80
drivers/pci/probe.c
View File

@ -87,8 +87,7 @@ static void release_pcibus_dev(struct device *dev)
{
struct pci_bus *pci_bus = to_pci_bus(dev);
if (pci_bus->bridge)
put_device(pci_bus->bridge);
put_device(pci_bus->bridge);
pci_bus_remove_resources(pci_bus);
pci_release_bus_of_node(pci_bus);
kfree(pci_bus);
@ -175,7 +174,6 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
u64 l64, sz64, mask64;
u16 orig_cmd;
struct pci_bus_region region, inverted_region;
bool bar_too_big = false, bar_too_high = false, bar_invalid = false;
mask = type ? PCI_ROM_ADDRESS_MASK : ~0;
@ -201,8 +199,8 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
* memory BAR or a ROM, bit 0 must be clear; if it's an io BAR, bit
* 1 must be clear.
*/
if (!sz || sz == 0xffffffff)
goto fail;
if (sz == 0xffffffff)
sz = 0;
/*
* I don't know how l can have all bits set. Copied from old code.
@ -215,23 +213,22 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
res->flags = decode_bar(dev, l);
res->flags |= IORESOURCE_SIZEALIGN;
if (res->flags & IORESOURCE_IO) {
l &= PCI_BASE_ADDRESS_IO_MASK;
mask = PCI_BASE_ADDRESS_IO_MASK & (u32) IO_SPACE_LIMIT;
l64 = l & PCI_BASE_ADDRESS_IO_MASK;
sz64 = sz & PCI_BASE_ADDRESS_IO_MASK;
mask64 = PCI_BASE_ADDRESS_IO_MASK & (u32)IO_SPACE_LIMIT;
} else {
l &= PCI_BASE_ADDRESS_MEM_MASK;
mask = (u32)PCI_BASE_ADDRESS_MEM_MASK;
l64 = l & PCI_BASE_ADDRESS_MEM_MASK;
sz64 = sz & PCI_BASE_ADDRESS_MEM_MASK;
mask64 = (u32)PCI_BASE_ADDRESS_MEM_MASK;
}
} else {
res->flags |= (l & IORESOURCE_ROM_ENABLE);
l &= PCI_ROM_ADDRESS_MASK;
mask = (u32)PCI_ROM_ADDRESS_MASK;
l64 = l & PCI_ROM_ADDRESS_MASK;
sz64 = sz & PCI_ROM_ADDRESS_MASK;
mask64 = (u32)PCI_ROM_ADDRESS_MASK;
}
if (res->flags & IORESOURCE_MEM_64) {
l64 = l;
sz64 = sz;
mask64 = mask | (u64)~0 << 32;
pci_read_config_dword(dev, pos + 4, &l);
pci_write_config_dword(dev, pos + 4, ~0);
pci_read_config_dword(dev, pos + 4, &sz);
@ -239,18 +236,30 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
l64 |= ((u64)l << 32);
sz64 |= ((u64)sz << 32);
mask64 |= ((u64)~0 << 32);
}
sz64 = pci_size(l64, sz64, mask64);
if (!dev->mmio_always_on && (orig_cmd & PCI_COMMAND_DECODE_ENABLE))
pci_write_config_word(dev, PCI_COMMAND, orig_cmd);
if (!sz64)
goto fail;
if (!sz64)
goto fail;
sz64 = pci_size(l64, sz64, mask64);
if (!sz64) {
dev_info(&dev->dev, FW_BUG "reg 0x%x: invalid BAR (can't size)\n",
pos);
goto fail;
}
if (res->flags & IORESOURCE_MEM_64) {
if ((sizeof(dma_addr_t) < 8 || sizeof(resource_size_t) < 8) &&
sz64 > 0x100000000ULL) {
res->flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED;
res->start = 0;
res->end = 0;
bar_too_big = true;
dev_err(&dev->dev, "reg 0x%x: can't handle BAR larger than 4GB (size %#010llx)\n",
pos, (unsigned long long)sz64);
goto out;
}
@ -259,22 +268,15 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
res->flags |= IORESOURCE_UNSET;
res->start = 0;
res->end = sz64;
bar_too_high = true;
dev_info(&dev->dev, "reg 0x%x: can't handle BAR above 4GB (bus address %#010llx)\n",
pos, (unsigned long long)l64);
goto out;
} else {
region.start = l64;
region.end = l64 + sz64;
}
} else {
sz = pci_size(l, sz, mask);
if (!sz)
goto fail;
region.start = l;
region.end = l + sz;
}
region.start = l64;
region.end = l64 + sz64;
pcibios_bus_to_resource(dev->bus, res, &region);
pcibios_resource_to_bus(dev->bus, &inverted_region, res);
@ -293,7 +295,8 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
res->flags |= IORESOURCE_UNSET;
res->start = 0;
res->end = region.end - region.start;
bar_invalid = true;
dev_info(&dev->dev, "reg 0x%x: initial BAR value %#010llx invalid\n",
pos, (unsigned long long)region.start);
}
goto out;
@ -302,19 +305,6 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
fail:
res->flags = 0;
out:
if (!dev->mmio_always_on &&
(orig_cmd & PCI_COMMAND_DECODE_ENABLE))
pci_write_config_word(dev, PCI_COMMAND, orig_cmd);
if (bar_too_big)
dev_err(&dev->dev, "reg 0x%x: can't handle BAR larger than 4GB (size %#010llx)\n",
pos, (unsigned long long) sz64);
if (bar_too_high)
dev_info(&dev->dev, "reg 0x%x: can't handle BAR above 4G (bus address %#010llx)\n",
pos, (unsigned long long) l64);
if (bar_invalid)
dev_info(&dev->dev, "reg 0x%x: initial BAR value %#010llx invalid\n",
pos, (unsigned long long) region.start);
if (res->flags)
dev_printk(KERN_DEBUG, &dev->dev, "reg 0x%x: %pR\n", pos, res);

3
drivers/pci/search.c
View File

@ -271,8 +271,7 @@ static struct pci_dev *pci_get_dev_by_id(const struct pci_device_id *id,
match_pci_dev_by_id);
if (dev)
pdev = to_pci_dev(dev);
if (from)
pci_dev_put(from);
pci_dev_put(from);
return pdev;
}

13
drivers/pci/xen-pcifront.c
View File

@ -596,8 +596,7 @@ static pci_ers_result_t pcifront_common_process(int cmd,
pcidev = pci_get_bus_and_slot(bus, devfn);
if (!pcidev || !pcidev->driver) {
dev_err(&pdev->xdev->dev, "device or AER driver is NULL\n");
if (pcidev)
pci_dev_put(pcidev);
pci_dev_put(pcidev);
return result;
}
pdrv = pcidev->driver;
@ -866,6 +865,11 @@ static int pcifront_try_connect(struct pcifront_device *pdev)
xenbus_dev_error(pdev->xdev, err,
"No PCI Roots found, trying 0000:00");
err = pcifront_scan_root(pdev, 0, 0);
if (err) {
xenbus_dev_fatal(pdev->xdev, err,
"Error scanning PCI root 0000:00");
goto out;
}
num_roots = 0;
} else if (err != 1) {
if (err == 0)
@ -947,6 +951,11 @@ static int pcifront_attach_devices(struct pcifront_device *pdev)
xenbus_dev_error(pdev->xdev, err,
"No PCI Roots found, trying 0000:00");
err = pcifront_rescan_root(pdev, 0, 0);
if (err) {
xenbus_dev_fatal(pdev->xdev, err,
"Error scanning PCI root 0000:00");
goto out;
}
num_roots = 0;
} else if (err != 1) {
if (err == 0)

1
include/linux/pci_hotplug.h
View File

@ -109,7 +109,6 @@ struct hotplug_slot {
struct list_head slot_list;
struct pci_slot *pci_slot;
};
#define to_hotplug_slot(n) container_of(n, struct hotplug_slot, kobj)
static inline const char *hotplug_slot_name(const struct hotplug_slot *slot)
{