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-rw-r--r--drivers/pci/Makefile22
-rw-r--r--drivers/pci/host/Kconfig2
-rw-r--r--drivers/pci/host/pci-imx6.c47
-rw-r--r--drivers/pci/host/pci-mvebu.c37
-rw-r--r--drivers/pci/host/pci-rcar-gen2.c180
-rw-r--r--drivers/pci/hotplug/acpiphp_glue.c6
-rw-r--r--drivers/pci/hotplug/cpqphp_core.c4
-rw-r--r--drivers/pci/hotplug/pciehp.h5
-rw-r--r--drivers/pci/hotplug/pciehp_acpi.c1
-rw-r--r--drivers/pci/hotplug/pciehp_core.c8
-rw-r--r--drivers/pci/hotplug/pciehp_ctrl.c173
-rw-r--r--drivers/pci/hotplug/pciehp_hpc.c75
-rw-r--r--drivers/pci/hotplug/pciehp_pci.c2
-rw-r--r--drivers/pci/iov.c119
-rw-r--r--drivers/pci/msi.c10
-rw-r--r--drivers/pci/pci.c82
-rw-r--r--drivers/pci/pci.h4
-rw-r--r--drivers/pci/probe.c76
-rw-r--r--drivers/pci/quirks.c185
-rw-r--r--drivers/pci/search.c10
20 files changed, 659 insertions, 389 deletions
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index 17d2b07ee67..e2501ac6fe8 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -33,21 +33,15 @@ obj-$(CONFIG_PCI_IOV) += iov.o
#
# Some architectures use the generic PCI setup functions
#
-obj-$(CONFIG_X86) += setup-bus.o
-obj-$(CONFIG_ALPHA) += setup-bus.o setup-irq.o
-obj-$(CONFIG_ARM) += setup-bus.o setup-irq.o
-obj-$(CONFIG_UNICORE32) += setup-bus.o setup-irq.o
-obj-$(CONFIG_PARISC) += setup-bus.o
-obj-$(CONFIG_SUPERH) += setup-bus.o setup-irq.o
-obj-$(CONFIG_PPC) += setup-bus.o
-obj-$(CONFIG_FRV) += setup-bus.o
-obj-$(CONFIG_MIPS) += setup-bus.o setup-irq.o
+obj-$(CONFIG_ALPHA) += setup-irq.o
+obj-$(CONFIG_ARM) += setup-irq.o
+obj-$(CONFIG_UNICORE32) += setup-irq.o
+obj-$(CONFIG_SUPERH) += setup-irq.o
+obj-$(CONFIG_MIPS) += setup-irq.o
obj-$(CONFIG_X86_VISWS) += setup-irq.o
-obj-$(CONFIG_MN10300) += setup-bus.o
-obj-$(CONFIG_MICROBLAZE) += setup-bus.o
-obj-$(CONFIG_TILE) += setup-bus.o setup-irq.o
-obj-$(CONFIG_SPARC_LEON) += setup-bus.o setup-irq.o
-obj-$(CONFIG_M68K) += setup-bus.o setup-irq.o
+obj-$(CONFIG_TILE) += setup-irq.o
+obj-$(CONFIG_SPARC_LEON) += setup-irq.o
+obj-$(CONFIG_M68K) += setup-irq.o
#
# ACPI Related PCI FW Functions
diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
index 47d46c6d846..a6f67ec8882 100644
--- a/drivers/pci/host/Kconfig
+++ b/drivers/pci/host/Kconfig
@@ -27,7 +27,7 @@ config PCI_TEGRA
config PCI_RCAR_GEN2
bool "Renesas R-Car Gen2 Internal PCI controller"
- depends on ARM && (ARCH_R8A7790 || ARCH_R8A7791 || COMPILE_TEST)
+ depends on ARCH_SHMOBILE || (ARM && COMPILE_TEST)
help
Say Y here if you want internal PCI support on R-Car Gen2 SoC.
There are 3 internal PCI controllers available with a single
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
index e8663a8c340..ee082509b0b 100644
--- a/drivers/pci/host/pci-imx6.c
+++ b/drivers/pci/host/pci-imx6.c
@@ -424,20 +424,40 @@ static void imx6_pcie_reset_phy(struct pcie_port *pp)
static int imx6_pcie_link_up(struct pcie_port *pp)
{
- u32 rc, ltssm, rx_valid;
+ u32 rc, debug_r0, rx_valid;
+ int count = 5;
/*
- * Test if the PHY reports that the link is up and also that
- * the link training finished. It might happen that the PHY
- * reports the link is already up, but the link training bit
- * is still set, so make sure to check the training is done
- * as well here.
+ * Test if the PHY reports that the link is up and also that the LTSSM
+ * training finished. There are three possible states of the link when
+ * this code is called:
+ * 1) The link is DOWN (unlikely)
+ * The link didn't come up yet for some reason. This usually means
+ * we have a real problem somewhere. Reset the PHY and exit. This
+ * state calls for inspection of the DEBUG registers.
+ * 2) The link is UP, but still in LTSSM training
+ * Wait for the training to finish, which should take a very short
+ * time. If the training does not finish, we have a problem and we
+ * need to inspect the DEBUG registers. If the training does finish,
+ * the link is up and operating correctly.
+ * 3) The link is UP and no longer in LTSSM training
+ * The link is up and operating correctly.
*/
- rc = readl(pp->dbi_base + PCIE_PHY_DEBUG_R1);
- if ((rc & PCIE_PHY_DEBUG_R1_XMLH_LINK_UP) &&
- !(rc & PCIE_PHY_DEBUG_R1_XMLH_LINK_IN_TRAINING))
- return 1;
-
+ while (1) {
+ rc = readl(pp->dbi_base + PCIE_PHY_DEBUG_R1);
+ if (!(rc & PCIE_PHY_DEBUG_R1_XMLH_LINK_UP))
+ break;
+ if (!(rc & PCIE_PHY_DEBUG_R1_XMLH_LINK_IN_TRAINING))
+ return 1;
+ if (!count--)
+ break;
+ dev_dbg(pp->dev, "Link is up, but still in training\n");
+ /*
+ * Wait a little bit, then re-check if the link finished
+ * the training.
+ */
+ usleep_range(1000, 2000);
+ }
/*
* From L0, initiate MAC entry to gen2 if EP/RC supports gen2.
* Wait 2ms (LTSSM timeout is 24ms, PHY lock is ~5us in gen2).
@@ -446,15 +466,16 @@ static int imx6_pcie_link_up(struct pcie_port *pp)
* to gen2 is stuck
*/
pcie_phy_read(pp->dbi_base, PCIE_PHY_RX_ASIC_OUT, &rx_valid);
- ltssm = readl(pp->dbi_base + PCIE_PHY_DEBUG_R0) & 0x3F;
+ debug_r0 = readl(pp->dbi_base + PCIE_PHY_DEBUG_R0);
if (rx_valid & 0x01)
return 0;
- if (ltssm != 0x0d)
+ if ((debug_r0 & 0x3f) != 0x0d)
return 0;
dev_err(pp->dev, "transition to gen2 is stuck, reset PHY!\n");
+ dev_dbg(pp->dev, "debug_r0=%08x debug_r1=%08x\n", debug_r0, rc);
imx6_pcie_reset_phy(pp);
diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index 13478ecd411..d3d1cfd51e0 100644
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -60,14 +60,6 @@
#define PCIE_DEBUG_CTRL 0x1a60
#define PCIE_DEBUG_SOFT_RESET BIT(20)
-/*
- * This product ID is registered by Marvell, and used when the Marvell
- * SoC is not the root complex, but an endpoint on the PCIe bus. It is
- * therefore safe to re-use this PCI ID for our emulated PCI-to-PCI
- * bridge.
- */
-#define MARVELL_EMULATED_PCI_PCI_BRIDGE_ID 0x7846
-
/* PCI configuration space of a PCI-to-PCI bridge */
struct mvebu_sw_pci_bridge {
u16 vendor;
@@ -109,7 +101,9 @@ struct mvebu_pcie {
struct mvebu_pcie_port *ports;
struct msi_chip *msi;
struct resource io;
+ char io_name[30];
struct resource realio;
+ char mem_name[30];
struct resource mem;
struct resource busn;
int nports;
@@ -388,7 +382,8 @@ static void mvebu_sw_pci_bridge_init(struct mvebu_pcie_port *port)
bridge->class = PCI_CLASS_BRIDGE_PCI;
bridge->vendor = PCI_VENDOR_ID_MARVELL;
- bridge->device = MARVELL_EMULATED_PCI_PCI_BRIDGE_ID;
+ bridge->device = mvebu_readl(port, PCIE_DEV_ID_OFF) >> 16;
+ bridge->revision = mvebu_readl(port, PCIE_DEV_REV_OFF) & 0xff;
bridge->header_type = PCI_HEADER_TYPE_BRIDGE;
bridge->cache_line_size = 0x10;
@@ -679,10 +674,30 @@ static int mvebu_pcie_setup(int nr, struct pci_sys_data *sys)
{
struct mvebu_pcie *pcie = sys_to_pcie(sys);
int i;
+ int domain = 0;
+
+#ifdef CONFIG_PCI_DOMAINS
+ domain = sys->domain;
+#endif
+
+ snprintf(pcie->mem_name, sizeof(pcie->mem_name), "PCI MEM %04x",
+ domain);
+ pcie->mem.name = pcie->mem_name;
- if (resource_size(&pcie->realio) != 0)
+ snprintf(pcie->io_name, sizeof(pcie->io_name), "PCI I/O %04x", domain);
+ pcie->realio.name = pcie->io_name;
+
+ if (request_resource(&iomem_resource, &pcie->mem))
+ return 0;
+
+ if (resource_size(&pcie->realio) != 0) {
+ if (request_resource(&ioport_resource, &pcie->realio)) {
+ release_resource(&pcie->mem);
+ return 0;
+ }
pci_add_resource_offset(&sys->resources, &pcie->realio,
sys->io_offset);
+ }
pci_add_resource_offset(&sys->resources, &pcie->mem, sys->mem_offset);
pci_add_resource(&sys->resources, &pcie->busn);
@@ -804,7 +819,7 @@ static int mvebu_get_tgt_attr(struct device_node *np, int devfn,
for (i = 0; i < nranges; i++) {
u32 flags = of_read_number(range, 1);
- u32 slot = of_read_number(range, 2);
+ u32 slot = of_read_number(range + 1, 1);
u64 cpuaddr = of_read_number(range + na, pna);
unsigned long rtype;
diff --git a/drivers/pci/host/pci-rcar-gen2.c b/drivers/pci/host/pci-rcar-gen2.c
index ceec147baec..fd3e3ab5650 100644
--- a/drivers/pci/host/pci-rcar-gen2.c
+++ b/drivers/pci/host/pci-rcar-gen2.c
@@ -18,6 +18,7 @@
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
+#include <linux/sizes.h>
#include <linux/slab.h>
/* AHB-PCI Bridge PCI communication registers */
@@ -39,9 +40,26 @@
#define RCAR_PCI_INT_ENABLE_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x20)
#define RCAR_PCI_INT_STATUS_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x24)
+#define RCAR_PCI_INT_SIGTABORT (1 << 0)
+#define RCAR_PCI_INT_SIGRETABORT (1 << 1)
+#define RCAR_PCI_INT_REMABORT (1 << 2)
+#define RCAR_PCI_INT_PERR (1 << 3)
+#define RCAR_PCI_INT_SIGSERR (1 << 4)
+#define RCAR_PCI_INT_RESERR (1 << 5)
+#define RCAR_PCI_INT_WIN1ERR (1 << 12)
+#define RCAR_PCI_INT_WIN2ERR (1 << 13)
#define RCAR_PCI_INT_A (1 << 16)
#define RCAR_PCI_INT_B (1 << 17)
#define RCAR_PCI_INT_PME (1 << 19)
+#define RCAR_PCI_INT_ALLERRORS (RCAR_PCI_INT_SIGTABORT | \
+ RCAR_PCI_INT_SIGRETABORT | \
+ RCAR_PCI_INT_SIGRETABORT | \
+ RCAR_PCI_INT_REMABORT | \
+ RCAR_PCI_INT_PERR | \
+ RCAR_PCI_INT_SIGSERR | \
+ RCAR_PCI_INT_RESERR | \
+ RCAR_PCI_INT_WIN1ERR | \
+ RCAR_PCI_INT_WIN2ERR)
#define RCAR_AHB_BUS_CTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x30)
#define RCAR_AHB_BUS_MMODE_HTRANS (1 << 0)
@@ -74,9 +92,6 @@
#define RCAR_PCI_UNIT_REV_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x48)
-/* Number of internal PCI controllers */
-#define RCAR_PCI_NR_CONTROLLERS 3
-
struct rcar_pci_priv {
struct device *dev;
void __iomem *reg;
@@ -84,6 +99,7 @@ struct rcar_pci_priv {
struct resource mem_res;
struct resource *cfg_res;
int irq;
+ unsigned long window_size;
};
/* PCI configuration space operations */
@@ -102,6 +118,10 @@ static void __iomem *rcar_pci_cfg_base(struct pci_bus *bus, unsigned int devfn,
if (slot > 2)
return NULL;
+ /* bridge logic only has registers to 0x40 */
+ if (slot == 0x0 && where >= 0x40)
+ return NULL;
+
val = slot ? RCAR_AHBPCI_WIN1_DEVICE | RCAR_AHBPCI_WIN_CTR_CFG :
RCAR_AHBPCI_WIN1_HOST | RCAR_AHBPCI_WIN_CTR_CFG;
@@ -156,7 +176,7 @@ static int rcar_pci_write_config(struct pci_bus *bus, unsigned int devfn,
}
/* PCI interrupt mapping */
-static int __init rcar_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+static int rcar_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct pci_sys_data *sys = dev->bus->sysdata;
struct rcar_pci_priv *priv = sys->private_data;
@@ -164,8 +184,48 @@ static int __init rcar_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
return priv->irq;
}
+#ifdef CONFIG_PCI_DEBUG
+/* if debug enabled, then attach an error handler irq to the bridge */
+
+static irqreturn_t rcar_pci_err_irq(int irq, void *pw)
+{
+ struct rcar_pci_priv *priv = pw;
+ u32 status = ioread32(priv->reg + RCAR_PCI_INT_STATUS_REG);
+
+ if (status & RCAR_PCI_INT_ALLERRORS) {
+ dev_err(priv->dev, "error irq: status %08x\n", status);
+
+ /* clear the error(s) */
+ iowrite32(status & RCAR_PCI_INT_ALLERRORS,
+ priv->reg + RCAR_PCI_INT_STATUS_REG);
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+static void rcar_pci_setup_errirq(struct rcar_pci_priv *priv)
+{
+ int ret;
+ u32 val;
+
+ ret = devm_request_irq(priv->dev, priv->irq, rcar_pci_err_irq,
+ IRQF_SHARED, "error irq", priv);
+ if (ret) {
+ dev_err(priv->dev, "cannot claim IRQ for error handling\n");
+ return;
+ }
+
+ val = ioread32(priv->reg + RCAR_PCI_INT_ENABLE_REG);
+ val |= RCAR_PCI_INT_ALLERRORS;
+ iowrite32(val, priv->reg + RCAR_PCI_INT_ENABLE_REG);
+}
+#else
+static inline void rcar_pci_setup_errirq(struct rcar_pci_priv *priv) { }
+#endif
+
/* PCI host controller setup */
-static int __init rcar_pci_setup(int nr, struct pci_sys_data *sys)
+static int rcar_pci_setup(int nr, struct pci_sys_data *sys)
{
struct rcar_pci_priv *priv = sys->private_data;
void __iomem *reg = priv->reg;
@@ -183,10 +243,31 @@ static int __init rcar_pci_setup(int nr, struct pci_sys_data *sys)
iowrite32(val, reg + RCAR_USBCTR_REG);
udelay(4);
- /* De-assert reset and set PCIAHB window1 size to 1GB */
+ /* De-assert reset and reset PCIAHB window1 size */
val &= ~(RCAR_USBCTR_PCIAHB_WIN1_MASK | RCAR_USBCTR_PCICLK_MASK |
RCAR_USBCTR_USBH_RST | RCAR_USBCTR_PLL_RST);
- iowrite32(val | RCAR_USBCTR_PCIAHB_WIN1_1G, reg + RCAR_USBCTR_REG);
+
+ /* Setup PCIAHB window1 size */
+ switch (priv->window_size) {
+ case SZ_2G:
+ val |= RCAR_USBCTR_PCIAHB_WIN1_2G;
+ break;
+ case SZ_1G:
+ val |= RCAR_USBCTR_PCIAHB_WIN1_1G;
+ break;
+ case SZ_512M:
+ val |= RCAR_USBCTR_PCIAHB_WIN1_512M;
+ break;
+ default:
+ pr_warn("unknown window size %ld - defaulting to 256M\n",
+ priv->window_size);
+ priv->window_size = SZ_256M;
+ /* fall-through */
+ case SZ_256M:
+ val |= RCAR_USBCTR_PCIAHB_WIN1_256M;
+ break;
+ }
+ iowrite32(val, reg + RCAR_USBCTR_REG);
/* Configure AHB master and slave modes */
iowrite32(RCAR_AHB_BUS_MODE, reg + RCAR_AHB_BUS_CTR_REG);
@@ -197,7 +278,7 @@ static int __init rcar_pci_setup(int nr, struct pci_sys_data *sys)
RCAR_PCI_ARBITER_PCIBP_MODE;
iowrite32(val, reg + RCAR_PCI_ARBITER_CTR_REG);
- /* PCI-AHB mapping: 0x40000000-0x80000000 */
+ /* PCI-AHB mapping: 0x40000000 base */
iowrite32(0x40000000 | RCAR_PCIAHB_PREFETCH16,
reg + RCAR_PCIAHB_WIN1_CTR_REG);
@@ -224,10 +305,15 @@ static int __init rcar_pci_setup(int nr, struct pci_sys_data *sys)
iowrite32(RCAR_PCI_INT_A | RCAR_PCI_INT_B | RCAR_PCI_INT_PME,
reg + RCAR_PCI_INT_ENABLE_REG);
+ if (priv->irq > 0)
+ rcar_pci_setup_errirq(priv);
+
/* Add PCI resources */
pci_add_resource(&sys->resources, &priv->io_res);
pci_add_resource(&sys->resources, &priv->mem_res);
+ /* Setup bus number based on platform device id */
+ sys->busnr = to_platform_device(priv->dev)->id;
return 1;
}
@@ -236,48 +322,13 @@ static struct pci_ops rcar_pci_ops = {
.write = rcar_pci_write_config,
};
-static struct hw_pci rcar_hw_pci __initdata = {
- .map_irq = rcar_pci_map_irq,
- .ops = &rcar_pci_ops,
- .setup = rcar_pci_setup,
-};
-
-static int rcar_pci_count __initdata;
-
-static int __init rcar_pci_add_controller(struct rcar_pci_priv *priv)
-{
- void **private_data;
- int count;
-
- if (rcar_hw_pci.nr_controllers < rcar_pci_count)
- goto add_priv;
-
- /* (Re)allocate private data pointer array if needed */
- count = rcar_pci_count + RCAR_PCI_NR_CONTROLLERS;
- private_data = kzalloc(count * sizeof(void *), GFP_KERNEL);
- if (!private_data)
- return -ENOMEM;
-
- rcar_pci_count = count;
- if (rcar_hw_pci.private_data) {
- memcpy(private_data, rcar_hw_pci.private_data,
- rcar_hw_pci.nr_controllers * sizeof(void *));
- kfree(rcar_hw_pci.private_data);
- }
-
- rcar_hw_pci.private_data = private_data;
-
-add_priv:
- /* Add private data pointer to the array */
- rcar_hw_pci.private_data[rcar_hw_pci.nr_controllers++] = priv;
- return 0;
-}
-
-static int __init rcar_pci_probe(struct platform_device *pdev)
+static int rcar_pci_probe(struct platform_device *pdev)
{
struct resource *cfg_res, *mem_res;
struct rcar_pci_priv *priv;
void __iomem *reg;
+ struct hw_pci hw;
+ void *hw_private[1];
cfg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
reg = devm_ioremap_resource(&pdev->dev, cfg_res);
@@ -308,31 +359,34 @@ static int __init rcar_pci_probe(struct platform_device *pdev)
priv->reg = reg;
priv->dev = &pdev->dev;
- return rcar_pci_add_controller(priv);
+ if (priv->irq < 0) {
+ dev_err(&pdev->dev, "no valid irq found\n");
+ return priv->irq;
+ }
+
+ priv->window_size = SZ_1G;
+
+ hw_private[0] = priv;
+ memset(&hw, 0, sizeof(hw));
+ hw.nr_controllers = ARRAY_SIZE(hw_private);
+ hw.private_data = hw_private;
+ hw.map_irq = rcar_pci_map_irq;
+ hw.ops = &rcar_pci_ops;
+ hw.setup = rcar_pci_setup;
+ pci_common_init_dev(&pdev->dev, &hw);
+ return 0;
}
static struct platform_driver rcar_pci_driver = {
.driver = {
.name = "pci-rcar-gen2",
+ .owner = THIS_MODULE,
+ .suppress_bind_attrs = true,
},
+ .probe = rcar_pci_probe,
};
-static int __init rcar_pci_init(void)
-{
- int retval;
-
- retval = platform_driver_probe(&rcar_pci_driver, rcar_pci_probe);
- if (!retval)
- pci_common_init(&rcar_hw_pci);
-
- /* Private data pointer array is not needed any more */
- kfree(rcar_hw_pci.private_data);
- rcar_hw_pci.private_data = NULL;
-
- return retval;
-}
-
-subsys_initcall(rcar_pci_init);
+module_platform_driver(rcar_pci_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Renesas R-Car Gen2 internal PCI");
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index cd929aed361..aee6a0acbbe 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -450,7 +450,7 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
*/
static unsigned char acpiphp_max_busnr(struct pci_bus *bus)
{
- struct list_head *tmp;
+ struct pci_bus *tmp;
unsigned char max, n;
/*
@@ -463,8 +463,8 @@ static unsigned char acpiphp_max_busnr(struct pci_bus *bus)
*/
max = bus->busn_res.start;
- list_for_each(tmp, &bus->children) {
- n = pci_bus_max_busnr(pci_bus_b(tmp));
+ list_for_each_entry(tmp, &bus->children, node) {
+ n = pci_bus_max_busnr(tmp);
if (n > max)
max = n;
}
diff --git a/drivers/pci/hotplug/cpqphp_core.c b/drivers/pci/hotplug/cpqphp_core.c
index 31273e155e6..037e2612c5b 100644
--- a/drivers/pci/hotplug/cpqphp_core.c
+++ b/drivers/pci/hotplug/cpqphp_core.c
@@ -920,12 +920,12 @@ static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
bus->max_bus_speed = PCI_SPEED_100MHz_PCIX;
break;
}
- if (bus_cap & 20) {
+ if (bus_cap & 0x20) {
dbg("bus max supports 66MHz PCI-X\n");
bus->max_bus_speed = PCI_SPEED_66MHz_PCIX;
break;
}
- if (bus_cap & 10) {
+ if (bus_cap & 0x10) {
dbg("bus max supports 66MHz PCI\n");
bus->max_bus_speed = PCI_SPEED_66MHz;
break;
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index 88b37cad4b3..8a66866b8cf 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -76,6 +76,7 @@ struct slot {
struct hotplug_slot *hotplug_slot;
struct delayed_work work; /* work for button event */
struct mutex lock;
+ struct mutex hotplug_lock;
struct workqueue_struct *wq;
};
@@ -109,6 +110,8 @@ struct controller {
#define INT_BUTTON_PRESS 7
#define INT_BUTTON_RELEASE 8
#define INT_BUTTON_CANCEL 9
+#define INT_LINK_UP 10
+#define INT_LINK_DOWN 11
#define STATIC_STATE 0
#define BLINKINGON_STATE 1
@@ -132,6 +135,7 @@ u8 pciehp_handle_attention_button(struct slot *p_slot);
u8 pciehp_handle_switch_change(struct slot *p_slot);
u8 pciehp_handle_presence_change(struct slot *p_slot);
u8 pciehp_handle_power_fault(struct slot *p_slot);
+void pciehp_handle_linkstate_change(struct slot *p_slot);
int pciehp_configure_device(struct slot *p_slot);
int pciehp_unconfigure_device(struct slot *p_slot);
void pciehp_queue_pushbutton_work(struct work_struct *work);
@@ -153,6 +157,7 @@ void pciehp_green_led_on(struct slot *slot);
void pciehp_green_led_off(struct slot *slot);
void pciehp_green_led_blink(struct slot *slot);
int pciehp_check_link_status(struct controller *ctrl);
+bool pciehp_check_link_active(struct controller *ctrl);
void pciehp_release_ctrl(struct controller *ctrl);
int pciehp_reset_slot(struct slot *slot, int probe);
diff --git a/drivers/pci/hotplug/pciehp_acpi.c b/drivers/pci/hotplug/pciehp_acpi.c
index eddddd447d0..20fea57d214 100644
--- a/drivers/pci/hotplug/pciehp_acpi.c
+++ b/drivers/pci/hotplug/pciehp_acpi.c
@@ -112,6 +112,7 @@ static struct pcie_port_service_driver __initdata dummy_driver = {
static int __init select_detection_mode(void)
{
struct dummy_slot *slot, *tmp;
+
if (pcie_port_service_register(&dummy_driver))
return PCIEHP_DETECT_ACPI;
pcie_port_service_unregister(&dummy_driver);
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index 53b58debc28..0e0a2fff20a 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -108,6 +108,7 @@ static int init_slot(struct controller *ctrl)
ops = kzalloc(sizeof(*ops), GFP_KERNEL);
if (!ops)
goto out;
+
ops->enable_slot = enable_slot;
ops->disable_slot = disable_slot;
ops->get_power_status = get_power_status;
@@ -283,8 +284,11 @@ static int pciehp_probe(struct pcie_device *dev)
slot = ctrl->slot;
pciehp_get_adapter_status(slot, &occupied);
pciehp_get_power_status(slot, &poweron);
- if (occupied && pciehp_force)
+ if (occupied && pciehp_force) {
+ mutex_lock(&slot->hotplug_lock);
pciehp_enable_slot(slot);
+ mutex_unlock(&slot->hotplug_lock);
+ }
/* If empty slot's power status is on, turn power off */
if (!occupied && poweron && POWER_CTRL(ctrl))
pciehp_power_off_slot(slot);
@@ -328,10 +332,12 @@ static int pciehp_resume (struct pcie_device *dev)
/* Check if slot is occupied */
pciehp_get_adapter_status(slot, &status);
+ mutex_lock(&slot->hotplug_lock);
if (status)
pciehp_enable_slot(slot);
else
pciehp_disable_slot(slot);
+ mutex_unlock(&slot->hotplug_lock);
return 0;
}
#endif /* PM */
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index 50628487597..c75e6a678dc 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -150,6 +150,27 @@ u8 pciehp_handle_power_fault(struct slot *p_slot)
return 1;
}
+void pciehp_handle_linkstate_change(struct slot *p_slot)
+{
+ u32 event_type;
+ struct controller *ctrl = p_slot->ctrl;
+
+ /* Link Status Change */
+ ctrl_dbg(ctrl, "Data Link Layer State change\n");
+
+ if (pciehp_check_link_active(ctrl)) {
+ ctrl_info(ctrl, "slot(%s): Link Up event\n",
+ slot_name(p_slot));
+ event_type = INT_LINK_UP;
+ } else {
+ ctrl_info(ctrl, "slot(%s): Link Down event\n",
+ slot_name(p_slot));
+ event_type = INT_LINK_DOWN;
+ }
+
+ queue_interrupt_event(p_slot, event_type);
+}
+
/* The following routines constitute the bulk of the
hotplug controller logic
*/
@@ -212,7 +233,8 @@ static int board_added(struct slot *p_slot)
if (retval) {
ctrl_err(ctrl, "Cannot add device at %04x:%02x:00\n",
pci_domain_nr(parent), parent->number);
- goto err_exit;
+ if (retval != -EEXIST)
+ goto err_exit;
}
pciehp_green_led_on(p_slot);
@@ -255,6 +277,9 @@ static int remove_board(struct slot *p_slot)
struct power_work_info {
struct slot *p_slot;
struct work_struct work;
+ unsigned int req;
+#define DISABLE_REQ 0
+#define ENABLE_REQ 1
};
/**
@@ -269,30 +294,38 @@ static void pciehp_power_thread(struct work_struct *work)
struct power_work_info *info =
container_of(work, struct power_work_info, work);
struct slot *p_slot = info->p_slot;
+ int ret;
- mutex_lock(&p_slot->lock);
- switch (p_slot->state) {
- case POWEROFF_STATE:
- mutex_unlock(&p_slot->lock);
+ switch (info->req) {
+ case DISABLE_REQ:
ctrl_dbg(p_slot->ctrl,
"Disabling domain:bus:device=%04x:%02x:00\n",
pci_domain_nr(p_slot->ctrl->pcie->port->subordinate),
p_slot->ctrl->pcie->port->subordinate->number);
+ mutex_lock(&p_slot->hotplug_lock);
pciehp_disable_slot(p_slot);
+ mutex_unlock(&p_slot->hotplug_lock);
mutex_lock(&p_slot->lock);
p_slot->state = STATIC_STATE;
- break;
- case POWERON_STATE:
mutex_unlock(&p_slot->lock);
- if (pciehp_enable_slot(p_slot))
+ break;
+ case ENABLE_REQ:
+ ctrl_dbg(p_slot->ctrl,
+ "Enabling domain:bus:device=%04x:%02x:00\n",
+ pci_domain_nr(p_slot->ctrl->pcie->port->subordinate),
+ p_slot->ctrl->pcie->port->subordinate->number);
+ mutex_lock(&p_slot->hotplug_lock);
+ ret = pciehp_enable_slot(p_slot);
+ mutex_unlock(&p_slot->hotplug_lock);
+ if (ret)
pciehp_green_led_off(p_slot);
mutex_lock(&p_slot->lock);
p_slot->state = STATIC_STATE;
+ mutex_unlock(&p_slot->lock);
break;
default:
break;
}
- mutex_unlock(&p_slot->lock);
kfree(info);
}
@@ -315,9 +348,11 @@ void pciehp_queue_pushbutton_work(struct work_struct *work)
switch (p_slot->state) {
case BLINKINGOFF_STATE:
p_slot->state = POWEROFF_STATE;
+ info->req = DISABLE_REQ;
break;
case BLINKINGON_STATE:
p_slot->state = POWERON_STATE;
+ info->req = ENABLE_REQ;
break;
default:
kfree(info);
@@ -364,11 +399,10 @@ static void handle_button_press_event(struct slot *p_slot)
*/
ctrl_info(ctrl, "Button cancel on Slot(%s)\n", slot_name(p_slot));
cancel_delayed_work(&p_slot->work);
- if (p_slot->state == BLINKINGOFF_STATE) {
+ if (p_slot->state == BLINKINGOFF_STATE)
pciehp_green_led_on(p_slot);
- } else {
+ else
pciehp_green_led_off(p_slot);
- }
pciehp_set_attention_status(p_slot, 0);
ctrl_info(ctrl, "PCI slot #%s - action canceled "
"due to button press\n", slot_name(p_slot));
@@ -407,14 +441,81 @@ static void handle_surprise_event(struct slot *p_slot)
INIT_WORK(&info->work, pciehp_power_thread);
pciehp_get_adapter_status(p_slot, &getstatus);
- if (!getstatus)
+ if (!getstatus) {
p_slot->state = POWEROFF_STATE;
- else
+ info->req = DISABLE_REQ;
+ } else {
p_slot->state = POWERON_STATE;
+ info->req = ENABLE_REQ;
+ }
queue_work(p_slot->wq, &info->work);
}
+/*
+ * Note: This function must be called with slot->lock held
+ */
+static void handle_link_event(struct slot *p_slot, u32 event)
+{
+ struct controller *ctrl = p_slot->ctrl;
+ struct power_work_info *info;
+
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info) {
+ ctrl_err(p_slot->ctrl, "%s: Cannot allocate memory\n",
+ __func__);
+ return;
+ }
+ info->p_slot = p_slot;
+ info->req = event == INT_LINK_UP ? ENABLE_REQ : DISABLE_REQ;
+ INIT_WORK(&info->work, pciehp_power_thread);
+
+ switch (p_slot->state) {
+ case BLINKINGON_STATE:
+ case BLINKINGOFF_STATE:
+ cancel_delayed_work(&p_slot->work);
+ /* Fall through */
+ case STATIC_STATE:
+ p_slot->state = event == INT_LINK_UP ?
+ POWERON_STATE : POWEROFF_STATE;
+ queue_work(p_slot->wq, &info->work);
+ break;
+ case POWERON_STATE:
+ if (event == INT_LINK_UP) {
+ ctrl_info(ctrl,
+ "Link Up event ignored on slot(%s): already powering on\n",
+ slot_name(p_slot));
+ kfree(info);
+ } else {
+ ctrl_info(ctrl,
+ "Link Down event queued on slot(%s): currently getting powered on\n",
+ slot_name(p_slot));
+ p_slot->state = POWEROFF_STATE;
+ queue_work(p_slot->wq, &info->work);
+ }
+ break;
+ case POWEROFF_STATE:
+ if (event == INT_LINK_UP) {
+ ctrl_info(ctrl,
+ "Link Up event queued on slot(%s): currently getting powered off\n",
+ slot_name(p_slot));
+ p_slot->state = POWERON_STATE;
+ queue_work(p_slot->wq, &info->work);
+ } else {
+ ctrl_info(ctrl,
+ "Link Down event ignored on slot(%s): already powering off\n",
+ slot_name(p_slot));
+ kfree(info);
+ }
+ break;
+ default:
+ ctrl_err(ctrl, "Not a valid state on slot(%s)\n",
+ slot_name(p_slot));
+ kfree(info);
+ break;
+ }
+}
+
static void interrupt_event_handler(struct work_struct *work)
{
struct event_info *info = container_of(work, struct event_info, work);
@@ -433,12 +534,23 @@ static void interrupt_event_handler(struct work_struct *work)
pciehp_green_led_off(p_slot);
break;
case INT_PRESENCE_ON:
- case INT_PRESENCE_OFF:
if (!HP_SUPR_RM(ctrl))
break;
+ ctrl_dbg(ctrl, "Surprise Insertion\n");
+ handle_surprise_event(p_slot);
+ break;
+ case INT_PRESENCE_OFF:
+ /*
+ * Regardless of surprise capability, we need to
+ * definitely remove a card that has been pulled out!
+ */
ctrl_dbg(ctrl, "Surprise Removal\n");
handle_surprise_event(p_slot);
break;
+ case INT_LINK_UP:
+ case INT_LINK_DOWN:
+ handle_link_event(p_slot, info->event_type);
+ break;
default:
break;
}
@@ -447,6 +559,9 @@ static void interrupt_event_handler(struct work_struct *work)
kfree(info);
}
+/*
+ * Note: This function must be called with slot->hotplug_lock held
+ */
int pciehp_enable_slot(struct slot *p_slot)
{
u8 getstatus = 0;
@@ -479,13 +594,15 @@ int pciehp_enable_slot(struct slot *p_slot)
pciehp_get_latch_status(p_slot, &getstatus);
rc = board_added(p_slot);
- if (rc) {
+ if (rc)
pciehp_get_latch_status(p_slot, &getstatus);
- }
+
return rc;
}
-
+/*
+ * Note: This function must be called with slot->hotplug_lock held
+ */
int pciehp_disable_slot(struct slot *p_slot)
{
u8 getstatus = 0;
@@ -494,24 +611,6 @@ int pciehp_disable_slot(struct slot *p_slot)
if (!p_slot->ctrl)
return 1;
- if (!HP_SUPR_RM(p_slot->ctrl)) {
- pciehp_get_adapter_status(p_slot, &getstatus);
- if (!getstatus) {
- ctrl_info(ctrl, "No adapter on slot(%s)\n",
- slot_name(p_slot));
- return -ENODEV;
- }
- }
-
- if (MRL_SENS(p_slot->ctrl)) {
- pciehp_get_latch_status(p_slot, &getstatus);
- if (getstatus) {
- ctrl_info(ctrl, "Latch open on slot(%s)\n",
- slot_name(p_slot));
- return -ENODEV;
- }
- }
-
if (POWER_CTRL(p_slot->ctrl)) {
pciehp_get_power_status(p_slot, &getstatus);
if (!getstatus) {
@@ -536,7 +635,9 @@ int pciehp_sysfs_enable_slot(struct slot *p_slot)
case STATIC_STATE:
p_slot->state = POWERON_STATE;
mutex_unlock(&p_slot->lock);
+ mutex_lock(&p_slot->hotplug_lock);
retval = pciehp_enable_slot(p_slot);
+ mutex_unlock(&p_slot->hotplug_lock);
mutex_lock(&p_slot->lock);
p_slot->state = STATIC_STATE;
break;
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 14acfccb767..d7d058fa19a 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -206,7 +206,7 @@ static void pcie_write_cmd(struct controller *ctrl, u16 cmd, u16 mask)
mutex_unlock(&ctrl->ctrl_lock);
}
-static bool check_link_active(struct controller *ctrl)
+bool pciehp_check_link_active(struct controller *ctrl)
{
struct pci_dev *pdev = ctrl_dev(ctrl);
u16 lnk_status;
@@ -225,12 +225,12 @@ static void __pcie_wait_link_active(struct controller *ctrl, bool active)
{
int timeout = 1000;
- if (check_link_active(ctrl) == active)
+ if (pciehp_check_link_active(ctrl) == active)
return;
while (timeout > 0) {
msleep(10);
timeout -= 10;
- if (check_link_active(ctrl) == active)
+ if (pciehp_check_link_active(ctrl) == active)
return;
}
ctrl_dbg(ctrl, "Data Link Layer Link Active not %s in 1000 msec\n",
@@ -242,11 +242,6 @@ static void pcie_wait_link_active(struct controller *ctrl)
__pcie_wait_link_active(ctrl, true);
}
-static void pcie_wait_link_not_active(struct controller *ctrl)
-{
- __pcie_wait_link_active(ctrl, false);
-}
-
static bool pci_bus_check_dev(struct pci_bus *bus, int devfn)
{
u32 l;
@@ -332,11 +327,6 @@ static int pciehp_link_enable(struct controller *ctrl)
return __pciehp_link_set(ctrl, true);
}
-static int pciehp_link_disable(struct controller *ctrl)
-{
- return __pciehp_link_set(ctrl, false);
-}
-
void pciehp_get_attention_status(struct slot *slot, u8 *status)
{
struct controller *ctrl = slot->ctrl;
@@ -508,14 +498,6 @@ void pciehp_power_off_slot(struct slot * slot)
{
struct controller *ctrl = slot->ctrl;
- /* Disable the link at first */
- pciehp_link_disable(ctrl);
- /* wait the link is down */
- if (ctrl->link_active_reporting)
- pcie_wait_link_not_active(ctrl);
- else
- msleep(1000);
-
pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_OFF, PCI_EXP_SLTCTL_PCC);
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL,
@@ -540,7 +522,7 @@ static irqreturn_t pcie_isr(int irq, void *dev_id)
detected &= (PCI_EXP_SLTSTA_ABP | PCI_EXP_SLTSTA_PFD |
PCI_EXP_SLTSTA_MRLSC | PCI_EXP_SLTSTA_PDC |
- PCI_EXP_SLTSTA_CC);
+ PCI_EXP_SLTSTA_CC | PCI_EXP_SLTSTA_DLLSC);
detected &= ~intr_loc;
intr_loc |= detected;
if (!intr_loc)
@@ -579,6 +561,10 @@ static irqreturn_t pcie_isr(int irq, void *dev_id)
ctrl->power_fault_detected = 1;
pciehp_handle_power_fault(slot);
}
+
+ if (intr_loc & PCI_EXP_SLTSTA_DLLSC)
+ pciehp_handle_linkstate_change(slot);
+
return IRQ_HANDLED;
}
@@ -596,9 +582,17 @@ void pcie_enable_notification(struct controller *ctrl)
* when it is cleared in the interrupt service routine, and
* next power fault detected interrupt was notified again.
*/
- cmd = PCI_EXP_SLTCTL_PDCE;
+
+ /*
+ * Always enable link events: thus link-up and link-down shall
+ * always be treated as hotplug and unplug respectively. Enable
+ * presence detect only if Attention Button is not present.
+ */
+ cmd = PCI_EXP_SLTCTL_DLLSCE;
if (ATTN_BUTTN(ctrl))
cmd |= PCI_EXP_SLTCTL_ABPE;
+ else
+ cmd |= PCI_EXP_SLTCTL_PDCE;
if (MRL_SENS(ctrl))
cmd |= PCI_EXP_SLTCTL_MRLSCE;
if (!pciehp_poll_mode)
@@ -606,7 +600,8 @@ void pcie_enable_notification(struct controller *ctrl)
mask = (PCI_EXP_SLTCTL_PDCE | PCI_EXP_SLTCTL_ABPE |
PCI_EXP_SLTCTL_MRLSCE | PCI_EXP_SLTCTL_PFDE |
- PCI_EXP_SLTCTL_HPIE | PCI_EXP_SLTCTL_CCIE);
+ PCI_EXP_SLTCTL_HPIE | PCI_EXP_SLTCTL_CCIE |
+ PCI_EXP_SLTCTL_DLLSCE);
pcie_write_cmd(ctrl, cmd, mask);
}
@@ -624,33 +619,38 @@ static void pcie_disable_notification(struct controller *ctrl)
/*
* pciehp has a 1:1 bus:slot relationship so we ultimately want a secondary
- * bus reset of the bridge, but if the slot supports surprise removal we need
- * to disable presence detection around the bus reset and clear any spurious
+ * bus reset of the bridge, but at the same time we want to ensure that it is
+ * not seen as a hot-unplug, followed by the hot-plug of the device. Thus,
+ * disable link state notification and presence detection change notification
+ * momentarily, if we see that they could interfere. Also, clear any spurious
* events after.
*/
int pciehp_reset_slot(struct slot *slot, int probe)
{
struct controller *ctrl = slot->ctrl;
struct pci_dev *pdev = ctrl_dev(ctrl);
+ u16 stat_mask = 0, ctrl_mask = 0;
if (probe)
return 0;
- if (HP_SUPR_RM(ctrl)) {
- pcie_write_cmd(ctrl, 0, PCI_EXP_SLTCTL_PDCE);
- if (pciehp_poll_mode)
- del_timer_sync(&ctrl->poll_timer);
+ if (!ATTN_BUTTN(ctrl)) {
+ ctrl_mask |= PCI_EXP_SLTCTL_PDCE;
+ stat_mask |= PCI_EXP_SLTSTA_PDC;
}
+ ctrl_mask |= PCI_EXP_SLTCTL_DLLSCE;
+ stat_mask |= PCI_EXP_SLTSTA_DLLSC;
+
+ pcie_write_cmd(ctrl, 0, ctrl_mask);
+ if (pciehp_poll_mode)
+ del_timer_sync(&ctrl->poll_timer);
pci_reset_bridge_secondary_bus(ctrl->pcie->port);
- if (HP_SUPR_RM(ctrl)) {
- pcie_capability_write_word(pdev, PCI_EXP_SLTSTA,
- PCI_EXP_SLTSTA_PDC);
- pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PDCE, PCI_EXP_SLTCTL_PDCE);
- if (pciehp_poll_mode)
- int_poll_timeout(ctrl->poll_timer.data);
- }
+ pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, stat_mask);
+ pcie_write_cmd(ctrl, ctrl_mask, ctrl_mask);
+ if (pciehp_poll_mode)
+ int_poll_timeout(ctrl->poll_timer.data);
return 0;
}
@@ -687,6 +687,7 @@ static int pcie_init_slot(struct controller *ctrl)
slot->ctrl = ctrl;
mutex_init(&slot->lock);
+ mutex_init(&slot->hotplug_lock);
INIT_DELAYED_WORK(&slot->work, pciehp_queue_pushbutton_work);
ctrl->slot = slot;
return 0;
diff --git a/drivers/pci/hotplug/pciehp_pci.c b/drivers/pci/hotplug/pciehp_pci.c
index b07d7cc2d69..1b533060ce6 100644
--- a/drivers/pci/hotplug/pciehp_pci.c
+++ b/drivers/pci/hotplug/pciehp_pci.c
@@ -50,7 +50,7 @@ int pciehp_configure_device(struct slot *p_slot)
"at %04x:%02x:00, cannot hot-add\n", pci_name(dev),
pci_domain_nr(parent), parent->number);
pci_dev_put(dev);
- ret = -EINVAL;
+ ret = -EEXIST;
goto out;
}
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 9dce7c5e2a7..de7a74782f9 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -170,97 +170,6 @@ static void virtfn_remove(struct pci_dev *dev, int id, int reset)
pci_dev_put(dev);
}
-static int sriov_migration(struct pci_dev *dev)
-{
- u16 status;
- struct pci_sriov *iov = dev->sriov;
-
- if (!iov->num_VFs)
- return 0;
-
- if (!(iov->cap & PCI_SRIOV_CAP_VFM))
- return 0;
-
- pci_read_config_word(dev, iov->pos + PCI_SRIOV_STATUS, &status);
- if (!(status & PCI_SRIOV_STATUS_VFM))
- return 0;
-
- schedule_work(&iov->mtask);
-
- return 1;
-}
-
-static void sriov_migration_task(struct work_struct *work)
-{
- int i;
- u8 state;
- u16 status;
- struct pci_sriov *iov = container_of(work, struct pci_sriov, mtask);
-
- for (i = iov->initial_VFs; i < iov->num_VFs; i++) {
- state = readb(iov->mstate + i);
- if (state == PCI_SRIOV_VFM_MI) {
- writeb(PCI_SRIOV_VFM_AV, iov->mstate + i);
- state = readb(iov->mstate + i);
- if (state == PCI_SRIOV_VFM_AV)
- virtfn_add(iov->self, i, 1);
- } else if (state == PCI_SRIOV_VFM_MO) {
- virtfn_remove(iov->self, i, 1);
- writeb(PCI_SRIOV_VFM_UA, iov->mstate + i);
- state = readb(iov->mstate + i);
- if (state == PCI_SRIOV_VFM_AV)
- virtfn_add(iov->self, i, 0);
- }
- }
-
- pci_read_config_word(iov->self, iov->pos + PCI_SRIOV_STATUS, &status);
- status &= ~PCI_SRIOV_STATUS_VFM;
- pci_write_config_word(iov->self, iov->pos + PCI_SRIOV_STATUS, status);
-}
-
-static int sriov_enable_migration(struct pci_dev *dev, int nr_virtfn)
-{
- int bir;
- u32 table;
- resource_size_t pa;
- struct pci_sriov *iov = dev->sriov;
-
- if (nr_virtfn <= iov->initial_VFs)
- return 0;
-
- pci_read_config_dword(dev, iov->pos + PCI_SRIOV_VFM, &table);
- bir = PCI_SRIOV_VFM_BIR(table);
- if (bir > PCI_STD_RESOURCE_END)
- return -EIO;
-
- table = PCI_SRIOV_VFM_OFFSET(table);
- if (table + nr_virtfn > pci_resource_len(dev, bir))
- return -EIO;
-
- pa = pci_resource_start(dev, bir) + table;
- iov->mstate = ioremap(pa, nr_virtfn);
- if (!iov->mstate)
- return -ENOMEM;
-
- INIT_WORK(&iov->mtask, sriov_migration_task);
-
- iov->ctrl |= PCI_SRIOV_CTRL_VFM | PCI_SRIOV_CTRL_INTR;
- pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
-
- return 0;
-}
-
-static void sriov_disable_migration(struct pci_dev *dev)
-{
- struct pci_sriov *iov = dev->sriov;
-
- iov->ctrl &= ~(PCI_SRIOV_CTRL_VFM | PCI_SRIOV_CTRL_INTR);
- pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
-
- cancel_work_sync(&iov->mtask);
- iounmap(iov->mstate);
-}
-
static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
{
int rc;
@@ -351,12 +260,6 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
goto failed;
}
- if (iov->cap & PCI_SRIOV_CAP_VFM) {
- rc = sriov_enable_migration(dev, nr_virtfn);
- if (rc)
- goto failed;
- }
-
kobject_uevent(&dev->dev.kobj, KOBJ_CHANGE);
iov->num_VFs = nr_virtfn;
@@ -387,9 +290,6 @@ static void sriov_disable(struct pci_dev *dev)
if (!iov->num_VFs)
return;
- if (iov->cap & PCI_SRIOV_CAP_VFM)
- sriov_disable_migration(dev);
-
for (i = 0; i < iov->num_VFs; i++)
virtfn_remove(dev, i, 0);
@@ -688,25 +588,6 @@ void pci_disable_sriov(struct pci_dev *dev)
EXPORT_SYMBOL_GPL(pci_disable_sriov);
/**
- * pci_sriov_migration - notify SR-IOV core of Virtual Function Migration
- * @dev: the PCI device
- *
- * Returns IRQ_HANDLED if the IRQ is handled, or IRQ_NONE if not.
- *
- * Physical Function driver is responsible to register IRQ handler using
- * VF Migration Interrupt Message Number, and call this function when the
- * interrupt is generated by the hardware.
- */
-irqreturn_t pci_sriov_migration(struct pci_dev *dev)
-{
- if (!dev->is_physfn)
- return IRQ_NONE;
-
- return sriov_migration(dev) ? IRQ_HANDLED : IRQ_NONE;
-}
-EXPORT_SYMBOL_GPL(pci_sriov_migration);
-
-/**
* pci_num_vf - return number of VFs associated with a PF device_release_driver
* @dev: the PCI device
*
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 7a0fec6ce57..955ab7990c5 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -545,9 +545,15 @@ static int populate_msi_sysfs(struct pci_dev *pdev)
return -ENOMEM;
list_for_each_entry(entry, &pdev->msi_list, list) {
char *name = kmalloc(20, GFP_KERNEL);
+ if (!name)
+ goto error_attrs;
+
msi_dev_attr = kzalloc(sizeof(*msi_dev_attr), GFP_KERNEL);
- if (!msi_dev_attr)
+ if (!msi_dev_attr) {
+ kfree(name);
goto error_attrs;
+ }
+
sprintf(name, "%d", entry->irq);
sysfs_attr_init(&msi_dev_attr->attr);
msi_dev_attr->attr.name = name;
@@ -589,6 +595,7 @@ error_attrs:
++count;
msi_attr = msi_attrs[count];
}
+ kfree(msi_attrs);
return ret;
}
@@ -959,7 +966,6 @@ EXPORT_SYMBOL(pci_disable_msi);
/**
* pci_msix_vec_count - return the number of device's MSI-X table entries
* @dev: pointer to the pci_dev data structure of MSI-X device function
-
* This function returns the number of device's MSI-X table entries and
* therefore the number of MSI-X vectors device is capable of sending.
* It returns a negative errno if the device is not capable of sending MSI-X
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 1febe90831b..b6ddde1d04c 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -108,12 +108,12 @@ static bool pcie_ari_disabled;
*/
unsigned char pci_bus_max_busnr(struct pci_bus* bus)
{
- struct list_head *tmp;
+ struct pci_bus *tmp;
unsigned char max, n;
max = bus->busn_res.end;
- list_for_each(tmp, &bus->children) {
- n = pci_bus_max_busnr(pci_bus_b(tmp));
+ list_for_each_entry(tmp, &bus->children, node) {
+ n = pci_bus_max_busnr(tmp);
if(n > max)
max = n;
}
@@ -1181,6 +1181,8 @@ EXPORT_SYMBOL_GPL(pci_load_and_free_saved_state);
static int do_pci_enable_device(struct pci_dev *dev, int bars)
{
int err;
+ u16 cmd;
+ u8 pin;
err = pci_set_power_state(dev, PCI_D0);
if (err < 0 && err != -EIO)
@@ -1190,6 +1192,14 @@ static int do_pci_enable_device(struct pci_dev *dev, int bars)
return err;
pci_fixup_device(pci_fixup_enable, dev);
+ pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+ if (pin) {
+ pci_read_config_word(dev, PCI_COMMAND, &cmd);
+ if (cmd & PCI_COMMAND_INTX_DISABLE)
+ pci_write_config_word(dev, PCI_COMMAND,
+ cmd & ~PCI_COMMAND_INTX_DISABLE);
+ }
+
return 0;
}
@@ -1611,29 +1621,27 @@ static void pci_pme_list_scan(struct work_struct *work)
struct pci_pme_device *pme_dev, *n;
mutex_lock(&pci_pme_list_mutex);
- if (!list_empty(&pci_pme_list)) {
- list_for_each_entry_safe(pme_dev, n, &pci_pme_list, list) {
- if (pme_dev->dev->pme_poll) {
- struct pci_dev *bridge;
-
- bridge = pme_dev->dev->bus->self;
- /*
- * If bridge is in low power state, the
- * configuration space of subordinate devices
- * may be not accessible
- */
- if (bridge && bridge->current_state != PCI_D0)
- continue;
- pci_pme_wakeup(pme_dev->dev, NULL);
- } else {
- list_del(&pme_dev->list);
- kfree(pme_dev);
- }
+ list_for_each_entry_safe(pme_dev, n, &pci_pme_list, list) {
+ if (pme_dev->dev->pme_poll) {
+ struct pci_dev *bridge;
+
+ bridge = pme_dev->dev->bus->self;
+ /*
+ * If bridge is in low power state, the
+ * configuration space of subordinate devices
+ * may be not accessible
+ */
+ if (bridge && bridge->current_state != PCI_D0)
+ continue;
+ pci_pme_wakeup(pme_dev->dev, NULL);
+ } else {
+ list_del(&pme_dev->list);
+ kfree(pme_dev);
}
- if (!list_empty(&pci_pme_list))
- schedule_delayed_work(&pci_pme_work,
- msecs_to_jiffies(PME_TIMEOUT));
}
+ if (!list_empty(&pci_pme_list))
+ schedule_delayed_work(&pci_pme_work,
+ msecs_to_jiffies(PME_TIMEOUT));
mutex_unlock(&pci_pme_list_mutex);
}
@@ -2180,21 +2188,18 @@ void pci_request_acs(void)
}
/**
- * pci_enable_acs - enable ACS if hardware support it
+ * pci_std_enable_acs - enable ACS on devices using standard ACS capabilites
* @dev: the PCI device
*/
-void pci_enable_acs(struct pci_dev *dev)
+static int pci_std_enable_acs(struct pci_dev *dev)
{
int pos;
u16 cap;
u16 ctrl;
- if (!pci_acs_enable)
- return;
-
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS);
if (!pos)
- return;
+ return -ENODEV;
pci_read_config_word(dev, pos + PCI_ACS_CAP, &cap);
pci_read_config_word(dev, pos + PCI_ACS_CTRL, &ctrl);
@@ -2212,6 +2217,23 @@ void pci_enable_acs(struct pci_dev *dev)
ctrl |= (cap & PCI_ACS_UF);
pci_write_config_word(dev, pos + PCI_ACS_CTRL, ctrl);
+
+ return 0;
+}
+
+/**
+ * pci_enable_acs - enable ACS if hardware support it
+ * @dev: the PCI device
+ */
+void pci_enable_acs(struct pci_dev *dev)
+{
+ if (!pci_acs_enable)
+ return;
+
+ if (!pci_std_enable_acs(dev))
+ return;
+
+ pci_dev_specific_enable_acs(dev);
}
static bool pci_acs_flags_enabled(struct pci_dev *pdev, u16 acs_flags)
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 4df38df224f..6bd082299e3 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -1,8 +1,6 @@
#ifndef DRIVERS_PCI_H
#define DRIVERS_PCI_H
-#include <linux/workqueue.h>
-
#define PCI_CFG_SPACE_SIZE 256
#define PCI_CFG_SPACE_EXP_SIZE 4096
@@ -240,8 +238,6 @@ struct pci_sriov {
struct pci_dev *dev; /* lowest numbered PF */
struct pci_dev *self; /* this PF */
struct mutex lock; /* lock for VF bus */
- struct work_struct mtask; /* VF Migration task */
- u8 __iomem *mstate; /* VF Migration State Array */
};
#ifdef CONFIG_PCI_ATS
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 6e34498ec9f..509494381a7 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -731,22 +731,6 @@ struct pci_bus *__ref pci_add_new_bus(struct pci_bus *parent, struct pci_dev *de
return child;
}
-static void pci_fixup_parent_subordinate_busnr(struct pci_bus *child, int max)
-{
- struct pci_bus *parent = child->parent;
-
- /* Attempts to fix that up are really dangerous unless
- we're going to re-assign all bus numbers. */
- if (!pcibios_assign_all_busses())
- return;
-
- while (parent->parent && parent->busn_res.end < max) {
- parent->busn_res.end = max;
- pci_write_config_byte(parent->self, PCI_SUBORDINATE_BUS, max);
- parent = parent->parent;
- }
-}
-
/*
* If it's a bridge, configure it and scan the bus behind it.
* For CardBus bridges, we don't scan behind as the devices will
@@ -782,7 +766,7 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass)
/* Check if setup is sensible at all */
if (!pass &&
(primary != bus->number || secondary <= bus->number ||
- secondary > subordinate)) {
+ secondary > subordinate || subordinate > bus->busn_res.end)) {
dev_info(&dev->dev, "bridge configuration invalid ([bus %02x-%02x]), reconfiguring\n",
secondary, subordinate);
broken = 1;
@@ -805,11 +789,10 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass)
goto out;
/*
- * If we already got to this bus through a different bridge,
- * don't re-add it. This can happen with the i450NX chipset.
- *
- * However, we continue to descend down the hierarchy and
- * scan remaining child buses.
+ * The bus might already exist for two reasons: Either we are
+ * rescanning the bus or the bus is reachable through more than
+ * one bridge. The second case can happen with the i450NX
+ * chipset.
*/
child = pci_find_bus(pci_domain_nr(bus), secondary);
if (!child) {
@@ -822,17 +805,19 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass)
}
cmax = pci_scan_child_bus(child);
- if (cmax > max)
- max = cmax;
- if (child->busn_res.end > max)
- max = child->busn_res.end;
+ if (cmax > subordinate)
+ dev_warn(&dev->dev, "bridge has subordinate %02x but max busn %02x\n",
+ subordinate, cmax);
+ /* subordinate should equal child->busn_res.end */
+ if (subordinate > max)
+ max = subordinate;
} else {
/*
* We need to assign a number to this bus which we always
* do in the second pass.
*/
if (!pass) {
- if (pcibios_assign_all_busses() || broken)
+ if (pcibios_assign_all_busses() || broken || is_cardbus)
/* Temporarily disable forwarding of the
configuration cycles on all bridges in
this bus segment to avoid possible
@@ -844,19 +829,25 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass)
goto out;
}
+ if (max >= bus->busn_res.end) {
+ dev_warn(&dev->dev, "can't allocate child bus %02x from %pR\n",
+ max, &bus->busn_res);
+ goto out;
+ }
+
/* Clear errors */
pci_write_config_word(dev, PCI_STATUS, 0xffff);
- /* Prevent assigning a bus number that already exists.
- * This can happen when a bridge is hot-plugged, so in
- * this case we only re-scan this bus. */
+ /* The bus will already exist if we are rescanning */
child = pci_find_bus(pci_domain_nr(bus), max+1);
if (!child) {
- child = pci_add_new_bus(bus, dev, ++max);
+ child = pci_add_new_bus(bus, dev, max+1);
if (!child)
goto out;
- pci_bus_insert_busn_res(child, max, 0xff);
+ pci_bus_insert_busn_res(child, max+1,
+ bus->busn_res.end);
}
+ max++;
buses = (buses & 0xff000000)
| ((unsigned int)(child->primary) << 0)
| ((unsigned int)(child->busn_res.start) << 8)
@@ -878,20 +869,7 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass)
if (!is_cardbus) {
child->bridge_ctl = bctl;
- /*
- * Adjust subordinate busnr in parent buses.
- * We do this before scanning for children because
- * some devices may not be detected if the bios
- * was lazy.
- */
- pci_fixup_parent_subordinate_busnr(child, max);
- /* Now we can scan all subordinate buses... */
max = pci_scan_child_bus(child);
- /*
- * now fix it up again since we have found
- * the real value of max.
- */
- pci_fixup_parent_subordinate_busnr(child, max);
} else {
/*
* For CardBus bridges, we leave 4 bus numbers
@@ -922,11 +900,15 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass)
}
}
max += i;
- pci_fixup_parent_subordinate_busnr(child, max);
}
/*
* Set the subordinate bus number to its real value.
*/
+ if (max > bus->busn_res.end) {
+ dev_warn(&dev->dev, "max busn %02x is outside %pR\n",
+ max, &bus->busn_res);
+ max = bus->busn_res.end;
+ }
pci_bus_update_busn_res_end(child, max);
pci_write_config_byte(dev, PCI_SUBORDINATE_BUS, max);
}
@@ -1835,7 +1817,7 @@ int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int bus_max)
res->flags |= IORESOURCE_PCI_FIXED;
}
- conflict = insert_resource_conflict(parent_res, res);
+ conflict = request_resource_conflict(parent_res, res);
if (conflict)
dev_printk(KERN_DEBUG, &b->dev,
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 5cb726c193d..ed2ed867c34 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3423,6 +3423,61 @@ static int pci_quirk_amd_sb_acs(struct pci_dev *dev, u16 acs_flags)
#endif
}
+/*
+ * Many Intel PCH root ports do provide ACS-like features to disable peer
+ * transactions and validate bus numbers in requests, but do not provide an
+ * actual PCIe ACS capability. This is the list of device IDs known to fall
+ * into that category as provided by Intel in Red Hat bugzilla 1037684.
+ */
+static const u16 pci_quirk_intel_pch_acs_ids[] = {
+ /* Ibexpeak PCH */
+ 0x3b42, 0x3b43, 0x3b44, 0x3b45, 0x3b46, 0x3b47, 0x3b48, 0x3b49,
+ 0x3b4a, 0x3b4b, 0x3b4c, 0x3b4d, 0x3b4e, 0x3b4f, 0x3b50, 0x3b51,
+ /* Cougarpoint PCH */
+ 0x1c10, 0x1c11, 0x1c12, 0x1c13, 0x1c14, 0x1c15, 0x1c16, 0x1c17,
+ 0x1c18, 0x1c19, 0x1c1a, 0x1c1b, 0x1c1c, 0x1c1d, 0x1c1e, 0x1c1f,
+ /* Pantherpoint PCH */
+ 0x1e10, 0x1e11, 0x1e12, 0x1e13, 0x1e14, 0x1e15, 0x1e16, 0x1e17,
+ 0x1e18, 0x1e19, 0x1e1a, 0x1e1b, 0x1e1c, 0x1e1d, 0x1e1e, 0x1e1f,
+ /* Lynxpoint-H PCH */
+ 0x8c10, 0x8c11, 0x8c12, 0x8c13, 0x8c14, 0x8c15, 0x8c16, 0x8c17,
+ 0x8c18, 0x8c19, 0x8c1a, 0x8c1b, 0x8c1c, 0x8c1d, 0x8c1e, 0x8c1f,
+ /* Lynxpoint-LP PCH */
+ 0x9c10, 0x9c11, 0x9c12, 0x9c13, 0x9c14, 0x9c15, 0x9c16, 0x9c17,
+ 0x9c18, 0x9c19, 0x9c1a, 0x9c1b,
+ /* Wildcat PCH */
+ 0x9c90, 0x9c91, 0x9c92, 0x9c93, 0x9c94, 0x9c95, 0x9c96, 0x9c97,
+ 0x9c98, 0x9c99, 0x9c9a, 0x9c9b,
+};
+
+static bool pci_quirk_intel_pch_acs_match(struct pci_dev *dev)
+{
+ int i;
+
+ /* Filter out a few obvious non-matches first */
+ if (!pci_is_pcie(dev) || pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT)
+ return false;
+
+ for (i = 0; i < ARRAY_SIZE(pci_quirk_intel_pch_acs_ids); i++)
+ if (pci_quirk_intel_pch_acs_ids[i] == dev->device)
+ return true;
+
+ return false;
+}
+
+#define INTEL_PCH_ACS_FLAGS (PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF | PCI_ACS_SV)
+
+static int pci_quirk_intel_pch_acs(struct pci_dev *dev, u16 acs_flags)
+{
+ u16 flags = dev->dev_flags & PCI_DEV_FLAGS_ACS_ENABLED_QUIRK ?
+ INTEL_PCH_ACS_FLAGS : 0;
+
+ if (!pci_quirk_intel_pch_acs_match(dev))
+ return -ENOTTY;
+
+ return acs_flags & ~flags ? 0 : 1;
+}
+
static const struct pci_dev_acs_enabled {
u16 vendor;
u16 device;
@@ -3434,6 +3489,7 @@ static const struct pci_dev_acs_enabled {
{ PCI_VENDOR_ID_ATI, 0x439d, pci_quirk_amd_sb_acs },
{ PCI_VENDOR_ID_ATI, 0x4384, pci_quirk_amd_sb_acs },
{ PCI_VENDOR_ID_ATI, 0x4399, pci_quirk_amd_sb_acs },
+ { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_intel_pch_acs },
{ 0 }
};
@@ -3461,3 +3517,132 @@ int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags)
return -ENOTTY;
}
+
+/* Config space offset of Root Complex Base Address register */
+#define INTEL_LPC_RCBA_REG 0xf0
+/* 31:14 RCBA address */
+#define INTEL_LPC_RCBA_MASK 0xffffc000
+/* RCBA Enable */
+#define INTEL_LPC_RCBA_ENABLE (1 << 0)
+
+/* Backbone Scratch Pad Register */
+#define INTEL_BSPR_REG 0x1104
+/* Backbone Peer Non-Posted Disable */
+#define INTEL_BSPR_REG_BPNPD (1 << 8)
+/* Backbone Peer Posted Disable */
+#define INTEL_BSPR_REG_BPPD (1 << 9)
+
+/* Upstream Peer Decode Configuration Register */
+#define INTEL_UPDCR_REG 0x1114
+/* 5:0 Peer Decode Enable bits */
+#define INTEL_UPDCR_REG_MASK 0x3f
+
+static int pci_quirk_enable_intel_lpc_acs(struct pci_dev *dev)
+{
+ u32 rcba, bspr, updcr;
+ void __iomem *rcba_mem;
+
+ /*
+ * Read the RCBA register from the LPC (D31:F0). PCH root ports
+ * are D28:F* and therefore get probed before LPC, thus we can't
+ * use pci_get_slot/pci_read_config_dword here.
+ */
+ pci_bus_read_config_dword(dev->bus, PCI_DEVFN(31, 0),
+ INTEL_LPC_RCBA_REG, &rcba);
+ if (!(rcba & INTEL_LPC_RCBA_ENABLE))
+ return -EINVAL;
+
+ rcba_mem = ioremap_nocache(rcba & INTEL_LPC_RCBA_MASK,
+ PAGE_ALIGN(INTEL_UPDCR_REG));
+ if (!rcba_mem)
+ return -ENOMEM;
+
+ /*
+ * The BSPR can disallow peer cycles, but it's set by soft strap and
+ * therefore read-only. If both posted and non-posted peer cycles are
+ * disallowed, we're ok. If either are allowed, then we need to use
+ * the UPDCR to disable peer decodes for each port. This provides the
+ * PCIe ACS equivalent of PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF
+ */
+ bspr = readl(rcba_mem + INTEL_BSPR_REG);
+ bspr &= INTEL_BSPR_REG_BPNPD | INTEL_BSPR_REG_BPPD;
+ if (bspr != (INTEL_BSPR_REG_BPNPD | INTEL_BSPR_REG_BPPD)) {
+ updcr = readl(rcba_mem + INTEL_UPDCR_REG);
+ if (updcr & INTEL_UPDCR_REG_MASK) {
+ dev_info(&dev->dev, "Disabling UPDCR peer decodes\n");
+ updcr &= ~INTEL_UPDCR_REG_MASK;
+ writel(updcr, rcba_mem + INTEL_UPDCR_REG);
+ }
+ }
+
+ iounmap(rcba_mem);
+ return 0;
+}
+
+/* Miscellaneous Port Configuration register */
+#define INTEL_MPC_REG 0xd8
+/* MPC: Invalid Receive Bus Number Check Enable */
+#define INTEL_MPC_REG_IRBNCE (1 << 26)
+
+static void pci_quirk_enable_intel_rp_mpc_acs(struct pci_dev *dev)
+{
+ u32 mpc;
+
+ /*
+ * When enabled, the IRBNCE bit of the MPC register enables the
+ * equivalent of PCI ACS Source Validation (PCI_ACS_SV), which
+ * ensures that requester IDs fall within the bus number range
+ * of the bridge. Enable if not already.
+ */
+ pci_read_config_dword(dev, INTEL_MPC_REG, &mpc);
+ if (!(mpc & INTEL_MPC_REG_IRBNCE)) {
+ dev_info(&dev->dev, "Enabling MPC IRBNCE\n");
+ mpc |= INTEL_MPC_REG_IRBNCE;
+ pci_write_config_word(dev, INTEL_MPC_REG, mpc);
+ }
+}
+
+static int pci_quirk_enable_intel_pch_acs(struct pci_dev *dev)
+{
+ if (!pci_quirk_intel_pch_acs_match(dev))
+ return -ENOTTY;
+
+ if (pci_quirk_enable_intel_lpc_acs(dev)) {
+ dev_warn(&dev->dev, "Failed to enable Intel PCH ACS quirk\n");
+ return 0;
+ }
+
+ pci_quirk_enable_intel_rp_mpc_acs(dev);
+
+ dev->dev_flags |= PCI_DEV_FLAGS_ACS_ENABLED_QUIRK;
+
+ dev_info(&dev->dev, "Intel PCH root port ACS workaround enabled\n");
+
+ return 0;
+}
+
+static const struct pci_dev_enable_acs {
+ u16 vendor;
+ u16 device;
+ int (*enable_acs)(struct pci_dev *dev);
+} pci_dev_enable_acs[] = {
+ { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_enable_intel_pch_acs },
+ { 0 }
+};
+
+void pci_dev_specific_enable_acs(struct pci_dev *dev)
+{
+ const struct pci_dev_enable_acs *i;
+ int ret;
+
+ for (i = pci_dev_enable_acs; i->enable_acs; i++) {
+ if ((i->vendor == dev->vendor ||
+ i->vendor == (u16)PCI_ANY_ID) &&
+ (i->device == dev->device ||
+ i->device == (u16)PCI_ANY_ID)) {
+ ret = i->enable_acs(dev);
+ if (ret >= 0)
+ return;
+ }
+ }
+}
diff --git a/drivers/pci/search.c b/drivers/pci/search.c
index 3ff2ac7c14e..4a1b972efe7 100644
--- a/drivers/pci/search.c
+++ b/drivers/pci/search.c
@@ -54,14 +54,14 @@ pci_find_upstream_pcie_bridge(struct pci_dev *pdev)
static struct pci_bus *pci_do_find_bus(struct pci_bus *bus, unsigned char busnr)
{
- struct pci_bus* child;
- struct list_head *tmp;
+ struct pci_bus *child;
+ struct pci_bus *tmp;
if(bus->number == busnr)
return bus;
- list_for_each(tmp, &bus->children) {
- child = pci_do_find_bus(pci_bus_b(tmp), busnr);
+ list_for_each_entry(tmp, &bus->children, node) {
+ child = pci_do_find_bus(tmp, busnr);
if(child)
return child;
}
@@ -111,7 +111,7 @@ pci_find_next_bus(const struct pci_bus *from)
down_read(&pci_bus_sem);
n = from ? from->node.next : pci_root_buses.next;
if (n != &pci_root_buses)
- b = pci_bus_b(n);
+ b = list_entry(n, struct pci_bus, node);
up_read(&pci_bus_sem);
return b;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-21 23:38:39 +0000