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-rw-r--r--drivers/pci/Kconfig4
-rw-r--r--drivers/pci/bus.c10
-rw-r--r--drivers/pci/host/Kconfig20
-rw-r--r--drivers/pci/host/Makefile2
-rw-r--r--drivers/pci/host/pci-dra7xx.c19
-rw-r--r--drivers/pci/host/pci-exynos.c34
-rw-r--r--drivers/pci/host/pci-imx6.c88
-rw-r--r--drivers/pci/host/pci-keystone.c16
-rw-r--r--drivers/pci/host/pci-layerscape.c25
-rw-r--r--drivers/pci/host/pci-mvebu.c18
-rw-r--r--drivers/pci/host/pci-tegra.c16
-rw-r--r--drivers/pci/host/pci-xgene-msi.c596
-rw-r--r--drivers/pci/host/pci-xgene.c66
-rw-r--r--drivers/pci/host/pcie-designware.c154
-rw-r--r--drivers/pci/host/pcie-iproc-bcma.c110
-rw-r--r--drivers/pci/host/pcie-iproc-platform.c12
-rw-r--r--drivers/pci/host/pcie-iproc.c6
-rw-r--r--drivers/pci/host/pcie-iproc.h4
-rw-r--r--drivers/pci/host/pcie-spear13xx.c17
-rw-r--r--drivers/pci/hotplug/Makefile3
-rw-r--r--drivers/pci/hotplug/acpiphp_glue.c5
-rw-r--r--drivers/pci/hotplug/pciehp.h23
-rw-r--r--drivers/pci/hotplug/pciehp_acpi.c137
-rw-r--r--drivers/pci/hotplug/pciehp_core.c54
-rw-r--r--drivers/pci/hotplug/pciehp_ctrl.c154
-rw-r--r--drivers/pci/hotplug/pciehp_hpc.c145
-rw-r--r--drivers/pci/msi.c53
-rw-r--r--drivers/pci/pci.c44
-rw-r--r--drivers/pci/pci.h32
-rw-r--r--drivers/pci/pcie/aer/aerdrv_core.c3
-rw-r--r--drivers/pci/pcie/aspm.c57
-rw-r--r--drivers/pci/probe.c69
-rw-r--r--drivers/pci/quirks.c6
-rw-r--r--drivers/pci/vc.c3
-rw-r--r--drivers/pci/xen-pcifront.c16
35 files changed, 1210 insertions, 811 deletions
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 7a8f1c5e65af..73de4efcbe6e 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -1,6 +1,10 @@
#
# PCI configuration
#
+config PCI_BUS_ADDR_T_64BIT
+ def_bool y if (ARCH_DMA_ADDR_T_64BIT || 64BIT)
+ depends on PCI
+
config PCI_MSI
bool "Message Signaled Interrupts (MSI and MSI-X)"
depends on PCI
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 90fa3a78fb7c..6fbd3f2b5992 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -92,11 +92,11 @@ void pci_bus_remove_resources(struct pci_bus *bus)
}
static struct pci_bus_region pci_32_bit = {0, 0xffffffffULL};
-#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+#ifdef CONFIG_PCI_BUS_ADDR_T_64BIT
static struct pci_bus_region pci_64_bit = {0,
- (dma_addr_t) 0xffffffffffffffffULL};
-static struct pci_bus_region pci_high = {(dma_addr_t) 0x100000000ULL,
- (dma_addr_t) 0xffffffffffffffffULL};
+ (pci_bus_addr_t) 0xffffffffffffffffULL};
+static struct pci_bus_region pci_high = {(pci_bus_addr_t) 0x100000000ULL,
+ (pci_bus_addr_t) 0xffffffffffffffffULL};
#endif
/*
@@ -200,7 +200,7 @@ int pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
resource_size_t),
void *alignf_data)
{
-#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+#ifdef CONFIG_PCI_BUS_ADDR_T_64BIT
int rc;
if (res->flags & IORESOURCE_MEM_64) {
diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
index 1dfb567b3522..c132bddc03f3 100644
--- a/drivers/pci/host/Kconfig
+++ b/drivers/pci/host/Kconfig
@@ -89,11 +89,20 @@ config PCI_XGENE
depends on ARCH_XGENE
depends on OF
select PCIEPORTBUS
+ select PCI_MSI_IRQ_DOMAIN if PCI_MSI
help
Say Y here if you want internal PCI support on APM X-Gene SoC.
There are 5 internal PCIe ports available. Each port is GEN3 capable
and have varied lanes from x1 to x8.
+config PCI_XGENE_MSI
+ bool "X-Gene v1 PCIe MSI feature"
+ depends on PCI_XGENE && PCI_MSI
+ default y
+ help
+ Say Y here if you want PCIe MSI support for the APM X-Gene v1 SoC.
+ This MSI driver supports 5 PCIe ports on the APM X-Gene v1 SoC.
+
config PCI_LAYERSCAPE
bool "Freescale Layerscape PCIe controller"
depends on OF && ARM
@@ -125,4 +134,15 @@ config PCIE_IPROC_PLATFORM
Say Y here if you want to use the Broadcom iProc PCIe controller
through the generic platform bus interface
+config PCIE_IPROC_BCMA
+ bool "Broadcom iProc PCIe BCMA bus driver"
+ depends on ARCH_BCM_IPROC || (ARM && COMPILE_TEST)
+ select PCIE_IPROC
+ select BCMA
+ select PCI_DOMAINS
+ default ARCH_BCM_5301X
+ help
+ Say Y here if you want to use the Broadcom iProc PCIe controller
+ through the BCMA bus interface
+
endmenu
diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile
index f733b4e27642..140d66f796e4 100644
--- a/drivers/pci/host/Makefile
+++ b/drivers/pci/host/Makefile
@@ -11,7 +11,9 @@ 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-$(CONFIG_PCI_XGENE_MSI) += pci-xgene-msi.o
obj-$(CONFIG_PCI_LAYERSCAPE) += pci-layerscape.o
obj-$(CONFIG_PCI_VERSATILE) += pci-versatile.o
obj-$(CONFIG_PCIE_IPROC) += pcie-iproc.o
obj-$(CONFIG_PCIE_IPROC_PLATFORM) += pcie-iproc-platform.o
+obj-$(CONFIG_PCIE_IPROC_BCMA) += pcie-iproc-bcma.o
diff --git a/drivers/pci/host/pci-dra7xx.c b/drivers/pci/host/pci-dra7xx.c
index 2d57e19a2cd4..80db09e47800 100644
--- a/drivers/pci/host/pci-dra7xx.c
+++ b/drivers/pci/host/pci-dra7xx.c
@@ -93,9 +93,9 @@ static int dra7xx_pcie_link_up(struct pcie_port *pp)
static int dra7xx_pcie_establish_link(struct pcie_port *pp)
{
- u32 reg;
- unsigned int retries = 1000;
struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pp);
+ u32 reg;
+ unsigned int retries;
if (dw_pcie_link_up(pp)) {
dev_err(pp->dev, "link is already up\n");
@@ -106,19 +106,14 @@ static int dra7xx_pcie_establish_link(struct pcie_port *pp)
reg |= LTSSM_EN;
dra7xx_pcie_writel(dra7xx, PCIECTRL_DRA7XX_CONF_DEVICE_CMD, reg);
- while (retries--) {
- reg = dra7xx_pcie_readl(dra7xx, PCIECTRL_DRA7XX_CONF_PHY_CS);
- if (reg & LINK_UP)
- break;
+ for (retries = 0; retries < 1000; retries++) {
+ if (dw_pcie_link_up(pp))
+ return 0;
usleep_range(10, 20);
}
- if (retries == 0) {
- dev_err(pp->dev, "link is not up\n");
- return -ETIMEDOUT;
- }
-
- return 0;
+ dev_err(pp->dev, "link is not up\n");
+ return -EINVAL;
}
static void dra7xx_pcie_enable_interrupts(struct pcie_port *pp)
diff --git a/drivers/pci/host/pci-exynos.c b/drivers/pci/host/pci-exynos.c
index c139237e0e52..f9f468d9a819 100644
--- a/drivers/pci/host/pci-exynos.c
+++ b/drivers/pci/host/pci-exynos.c
@@ -316,9 +316,9 @@ static void exynos_pcie_assert_reset(struct pcie_port *pp)
static int exynos_pcie_establish_link(struct pcie_port *pp)
{
- u32 val;
- int count = 0;
struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ u32 val;
+ unsigned int retries;
if (dw_pcie_link_up(pp)) {
dev_err(pp->dev, "Link already up\n");
@@ -357,27 +357,23 @@ static int exynos_pcie_establish_link(struct pcie_port *pp)
PCIE_APP_LTSSM_ENABLE);
/* check if the link is up or not */
- while (!dw_pcie_link_up(pp)) {
- mdelay(100);
- count++;
- if (count == 10) {
- while (exynos_phy_readl(exynos_pcie,
- PCIE_PHY_PLL_LOCKED) == 0) {
- val = exynos_blk_readl(exynos_pcie,
- PCIE_PHY_PLL_LOCKED);
- dev_info(pp->dev, "PLL Locked: 0x%x\n", val);
- }
- /* power off phy */
- exynos_pcie_power_off_phy(pp);
-
- dev_err(pp->dev, "PCIe Link Fail\n");
- return -EINVAL;
+ for (retries = 0; retries < 10; retries++) {
+ if (dw_pcie_link_up(pp)) {
+ dev_info(pp->dev, "Link up\n");
+ return 0;
}
+ mdelay(100);
}
- dev_info(pp->dev, "Link up\n");
+ while (exynos_phy_readl(exynos_pcie, PCIE_PHY_PLL_LOCKED) == 0) {
+ val = exynos_blk_readl(exynos_pcie, PCIE_PHY_PLL_LOCKED);
+ dev_info(pp->dev, "PLL Locked: 0x%x\n", val);
+ }
+ /* power off phy */
+ exynos_pcie_power_off_phy(pp);
- return 0;
+ dev_err(pp->dev, "PCIe Link Fail\n");
+ return -EINVAL;
}
static void exynos_pcie_clear_irq_pulse(struct pcie_port *pp)
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
index fdb95367721e..233a196c6e66 100644
--- a/drivers/pci/host/pci-imx6.c
+++ b/drivers/pci/host/pci-imx6.c
@@ -47,6 +47,8 @@ struct imx6_pcie {
#define PCIE_RC_LCR_MAX_LINK_SPEEDS_GEN2 0x2
#define PCIE_RC_LCR_MAX_LINK_SPEEDS_MASK 0xf
+#define PCIE_RC_LCSR 0x80
+
/* PCIe Port Logic registers (memory-mapped) */
#define PL_OFFSET 0x700
#define PCIE_PL_PFLR (PL_OFFSET + 0x08)
@@ -335,21 +337,36 @@ static void imx6_pcie_init_phy(struct pcie_port *pp)
static int imx6_pcie_wait_for_link(struct pcie_port *pp)
{
- int count = 200;
+ unsigned int retries;
- while (!dw_pcie_link_up(pp)) {
+ for (retries = 0; retries < 200; retries++) {
+ if (dw_pcie_link_up(pp))
+ return 0;
usleep_range(100, 1000);
- if (--count)
- continue;
-
- dev_err(pp->dev, "phy link never came up\n");
- dev_dbg(pp->dev, "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n",
- readl(pp->dbi_base + PCIE_PHY_DEBUG_R0),
- readl(pp->dbi_base + PCIE_PHY_DEBUG_R1));
- return -EINVAL;
}
- return 0;
+ dev_err(pp->dev, "phy link never came up\n");
+ dev_dbg(pp->dev, "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n",
+ readl(pp->dbi_base + PCIE_PHY_DEBUG_R0),
+ readl(pp->dbi_base + PCIE_PHY_DEBUG_R1));
+ return -EINVAL;
+}
+
+static int imx6_pcie_wait_for_speed_change(struct pcie_port *pp)
+{
+ u32 tmp;
+ unsigned int retries;
+
+ for (retries = 0; retries < 200; retries++) {
+ tmp = readl(pp->dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL);
+ /* Test if the speed change finished. */
+ if (!(tmp & PORT_LOGIC_SPEED_CHANGE))
+ return 0;
+ usleep_range(100, 1000);
+ }
+
+ dev_err(pp->dev, "Speed change timeout\n");
+ return -EINVAL;
}
static irqreturn_t imx6_pcie_msi_handler(int irq, void *arg)
@@ -359,11 +376,11 @@ static irqreturn_t imx6_pcie_msi_handler(int irq, void *arg)
return dw_handle_msi_irq(pp);
}
-static int imx6_pcie_start_link(struct pcie_port *pp)
+static int imx6_pcie_establish_link(struct pcie_port *pp)
{
struct imx6_pcie *imx6_pcie = to_imx6_pcie(pp);
- uint32_t tmp;
- int ret, count;
+ u32 tmp;
+ int ret;
/*
* Force Gen1 operation when starting the link. In case the link is
@@ -397,29 +414,22 @@ static int imx6_pcie_start_link(struct pcie_port *pp)
tmp |= PORT_LOGIC_SPEED_CHANGE;
writel(tmp, pp->dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL);
- count = 200;
- while (count--) {
- tmp = readl(pp->dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL);
- /* Test if the speed change finished. */
- if (!(tmp & PORT_LOGIC_SPEED_CHANGE))
- break;
- usleep_range(100, 1000);
+ ret = imx6_pcie_wait_for_speed_change(pp);
+ if (ret) {
+ dev_err(pp->dev, "Failed to bring link up!\n");
+ return ret;
}
/* Make sure link training is finished as well! */
- if (count)
- ret = imx6_pcie_wait_for_link(pp);
- else
- ret = -EINVAL;
-
+ ret = imx6_pcie_wait_for_link(pp);
if (ret) {
dev_err(pp->dev, "Failed to bring link up!\n");
- } else {
- tmp = readl(pp->dbi_base + 0x80);
- dev_dbg(pp->dev, "Link up, Gen=%i\n", (tmp >> 16) & 0xf);
+ return ret;
}
- return ret;
+ tmp = readl(pp->dbi_base + PCIE_RC_LCSR);
+ dev_dbg(pp->dev, "Link up, Gen=%i\n", (tmp >> 16) & 0xf);
+ return 0;
}
static void imx6_pcie_host_init(struct pcie_port *pp)
@@ -432,7 +442,7 @@ static void imx6_pcie_host_init(struct pcie_port *pp)
dw_pcie_setup_rc(pp);
- imx6_pcie_start_link(pp);
+ imx6_pcie_establish_link(pp);
if (IS_ENABLED(CONFIG_PCI_MSI))
dw_pcie_msi_init(pp);
@@ -440,19 +450,19 @@ static void imx6_pcie_host_init(struct pcie_port *pp)
static void imx6_pcie_reset_phy(struct pcie_port *pp)
{
- uint32_t temp;
+ u32 tmp;
- pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &temp);
- temp |= (PHY_RX_OVRD_IN_LO_RX_DATA_EN |
- PHY_RX_OVRD_IN_LO_RX_PLL_EN);
- pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, temp);
+ pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &tmp);
+ tmp |= (PHY_RX_OVRD_IN_LO_RX_DATA_EN |
+ PHY_RX_OVRD_IN_LO_RX_PLL_EN);
+ pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, tmp);
usleep_range(2000, 3000);
- pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &temp);
- temp &= ~(PHY_RX_OVRD_IN_LO_RX_DATA_EN |
+ pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &tmp);
+ tmp &= ~(PHY_RX_OVRD_IN_LO_RX_DATA_EN |
PHY_RX_OVRD_IN_LO_RX_PLL_EN);
- pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, temp);
+ pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, tmp);
}
static int imx6_pcie_link_up(struct pcie_port *pp)
diff --git a/drivers/pci/host/pci-keystone.c b/drivers/pci/host/pci-keystone.c
index 75333b0c4f0a..b75d684aefcd 100644
--- a/drivers/pci/host/pci-keystone.c
+++ b/drivers/pci/host/pci-keystone.c
@@ -88,7 +88,7 @@ DECLARE_PCI_FIXUP_ENABLE(PCI_ANY_ID, PCI_ANY_ID, quirk_limit_mrrs);
static int ks_pcie_establish_link(struct keystone_pcie *ks_pcie)
{
struct pcie_port *pp = &ks_pcie->pp;
- int count = 200;
+ unsigned int retries;
dw_pcie_setup_rc(pp);
@@ -99,17 +99,15 @@ static int ks_pcie_establish_link(struct keystone_pcie *ks_pcie)
ks_dw_pcie_initiate_link_train(ks_pcie);
/* check if the link is up or not */
- while (!dw_pcie_link_up(pp)) {
+ for (retries = 0; retries < 200; retries++) {
+ if (dw_pcie_link_up(pp))
+ return 0;
usleep_range(100, 1000);
- if (--count) {
- ks_dw_pcie_initiate_link_train(ks_pcie);
- continue;
- }
- dev_err(pp->dev, "phy link never came up\n");
- return -EINVAL;
+ ks_dw_pcie_initiate_link_train(ks_pcie);
}
- return 0;
+ dev_err(pp->dev, "phy link never came up\n");
+ return -EINVAL;
}
static void ks_pcie_msi_irq_handler(unsigned int irq, struct irq_desc *desc)
diff --git a/drivers/pci/host/pci-layerscape.c b/drivers/pci/host/pci-layerscape.c
index 4a6e62f67579..b2328ea13dcf 100644
--- a/drivers/pci/host/pci-layerscape.c
+++ b/drivers/pci/host/pci-layerscape.c
@@ -62,22 +62,27 @@ static int ls_pcie_link_up(struct pcie_port *pp)
return 1;
}
+static int ls_pcie_establish_link(struct pcie_port *pp)
+{
+ unsigned int retries;
+
+ for (retries = 0; retries < 200; retries++) {
+ if (dw_pcie_link_up(pp))
+ return 0;
+ usleep_range(100, 1000);
+ }
+
+ dev_err(pp->dev, "phy link never came up\n");
+ return -EINVAL;
+}
+
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;
- }
- }
+ ls_pcie_establish_link(pp);
/*
* LS1021A Workaround for internal TKT228622
diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index 1ab863551920..70aa09556ec5 100644
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -751,21 +751,6 @@ static int mvebu_pcie_setup(int nr, struct pci_sys_data *sys)
return 1;
}
-static struct pci_bus *mvebu_pcie_scan_bus(int nr, struct pci_sys_data *sys)
-{
- struct mvebu_pcie *pcie = sys_to_pcie(sys);
- struct pci_bus *bus;
-
- bus = pci_create_root_bus(&pcie->pdev->dev, sys->busnr,
- &mvebu_pcie_ops, sys, &sys->resources);
- if (!bus)
- return NULL;
-
- pci_scan_child_bus(bus);
-
- return bus;
-}
-
static resource_size_t mvebu_pcie_align_resource(struct pci_dev *dev,
const struct resource *res,
resource_size_t start,
@@ -809,12 +794,11 @@ static void mvebu_pcie_enable(struct mvebu_pcie *pcie)
hw.nr_controllers = 1;
hw.private_data = (void **)&pcie;
hw.setup = mvebu_pcie_setup;
- hw.scan = mvebu_pcie_scan_bus;
hw.map_irq = of_irq_parse_and_map_pci;
hw.ops = &mvebu_pcie_ops;
hw.align_resource = mvebu_pcie_align_resource;
- pci_common_init(&hw);
+ pci_common_init_dev(&pcie->pdev->dev, &hw);
}
/*
diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index 00e92720d7f7..10c05718dbfd 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -630,21 +630,6 @@ static int tegra_pcie_map_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
return irq;
}
-static struct pci_bus *tegra_pcie_scan_bus(int nr, struct pci_sys_data *sys)
-{
- struct tegra_pcie *pcie = sys_to_pcie(sys);
- struct pci_bus *bus;
-
- bus = pci_create_root_bus(pcie->dev, sys->busnr, &tegra_pcie_ops, sys,
- &sys->resources);
- if (!bus)
- return NULL;
-
- pci_scan_child_bus(bus);
-
- return bus;
-}
-
static irqreturn_t tegra_pcie_isr(int irq, void *arg)
{
const char *err_msg[] = {
@@ -1831,7 +1816,6 @@ static int tegra_pcie_enable(struct tegra_pcie *pcie)
hw.private_data = (void **)&pcie;
hw.setup = tegra_pcie_setup;
hw.map_irq = tegra_pcie_map_irq;
- hw.scan = tegra_pcie_scan_bus;
hw.ops = &tegra_pcie_ops;
pci_common_init_dev(pcie->dev, &hw);
diff --git a/drivers/pci/host/pci-xgene-msi.c b/drivers/pci/host/pci-xgene-msi.c
new file mode 100644
index 000000000000..2d31d4d6fd08
--- /dev/null
+++ b/drivers/pci/host/pci-xgene-msi.c
@@ -0,0 +1,596 @@
+/*
+ * APM X-Gene MSI Driver
+ *
+ * Copyright (c) 2014, Applied Micro Circuits Corporation
+ * Author: Tanmay Inamdar <tinamdar@apm.com>
+ * Duc Dang <dhdang@apm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/cpu.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/msi.h>
+#include <linux/of_irq.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/of_pci.h>
+
+#define MSI_IR0 0x000000
+#define MSI_INT0 0x800000
+#define IDX_PER_GROUP 8
+#define IRQS_PER_IDX 16
+#define NR_HW_IRQS 16
+#define NR_MSI_VEC (IDX_PER_GROUP * IRQS_PER_IDX * NR_HW_IRQS)
+
+struct xgene_msi_group {
+ struct xgene_msi *msi;
+ int gic_irq;
+ u32 msi_grp;
+};
+
+struct xgene_msi {
+ struct device_node *node;
+ struct msi_controller mchip;
+ struct irq_domain *domain;
+ u64 msi_addr;
+ void __iomem *msi_regs;
+ unsigned long *bitmap;
+ struct mutex bitmap_lock;
+ struct xgene_msi_group *msi_groups;
+ int num_cpus;
+};
+
+/* Global data */
+static struct xgene_msi xgene_msi_ctrl;
+
+static struct irq_chip xgene_msi_top_irq_chip = {
+ .name = "X-Gene1 MSI",
+ .irq_enable = pci_msi_unmask_irq,
+ .irq_disable = pci_msi_mask_irq,
+ .irq_mask = pci_msi_mask_irq,
+ .irq_unmask = pci_msi_unmask_irq,
+};
+
+static struct msi_domain_info xgene_msi_domain_info = {
+ .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
+ MSI_FLAG_PCI_MSIX),
+ .chip = &xgene_msi_top_irq_chip,
+};
+
+/*
+ * X-Gene v1 has 16 groups of MSI termination registers MSInIRx, where
+ * n is group number (0..F), x is index of registers in each group (0..7)
+ * The register layout is as follows:
+ * MSI0IR0 base_addr
+ * MSI0IR1 base_addr + 0x10000
+ * ... ...
+ * MSI0IR6 base_addr + 0x60000
+ * MSI0IR7 base_addr + 0x70000
+ * MSI1IR0 base_addr + 0x80000
+ * MSI1IR1 base_addr + 0x90000
+ * ... ...
+ * MSI1IR7 base_addr + 0xF0000
+ * MSI2IR0 base_addr + 0x100000
+ * ... ...
+ * MSIFIR0 base_addr + 0x780000
+ * MSIFIR1 base_addr + 0x790000
+ * ... ...
+ * MSIFIR7 base_addr + 0x7F0000
+ * MSIINT0 base_addr + 0x800000
+ * MSIINT1 base_addr + 0x810000
+ * ... ...
+ * MSIINTF base_addr + 0x8F0000
+ *
+ * Each index register supports 16 MSI vectors (0..15) to generate interrupt.
+ * There are total 16 GIC IRQs assigned for these 16 groups of MSI termination
+ * registers.
+ *
+ * Each MSI termination group has 1 MSIINTn register (n is 0..15) to indicate
+ * the MSI pending status caused by 1 of its 8 index registers.
+ */
+
+/* MSInIRx read helper */
+static u32 xgene_msi_ir_read(struct xgene_msi *msi,
+ u32 msi_grp, u32 msir_idx)
+{
+ return readl_relaxed(msi->msi_regs + MSI_IR0 +
+ (msi_grp << 19) + (msir_idx << 16));
+}
+
+/* MSIINTn read helper */
+static u32 xgene_msi_int_read(struct xgene_msi *msi, u32 msi_grp)
+{
+ return readl_relaxed(msi->msi_regs + MSI_INT0 + (msi_grp << 16));
+}
+
+/*
+ * With 2048 MSI vectors supported, the MSI message can be constructed using
+ * following scheme:
+ * - Divide into 8 256-vector groups
+ * Group 0: 0-255
+ * Group 1: 256-511
+ * Group 2: 512-767
+ * ...
+ * Group 7: 1792-2047
+ * - Each 256-vector group is divided into 16 16-vector groups
+ * As an example: 16 16-vector groups for 256-vector group 0-255 is
+ * Group 0: 0-15
+ * Group 1: 16-32
+ * ...
+ * Group 15: 240-255
+ * - The termination address of MSI vector in 256-vector group n and 16-vector
+ * group x is the address of MSIxIRn
+ * - The data for MSI vector in 16-vector group x is x
+ */
+static u32 hwirq_to_reg_set(unsigned long hwirq)
+{
+ return (hwirq / (NR_HW_IRQS * IRQS_PER_IDX));
+}
+
+static u32 hwirq_to_group(unsigned long hwirq)
+{
+ return (hwirq % NR_HW_IRQS);
+}
+
+static u32 hwirq_to_msi_data(unsigned long hwirq)
+{
+ return ((hwirq / NR_HW_IRQS) % IRQS_PER_IDX);
+}
+
+static void xgene_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
+{
+ struct xgene_msi *msi = irq_data_get_irq_chip_data(data);
+ u32 reg_set = hwirq_to_reg_set(data->hwirq);
+ u32 group = hwirq_to_group(data->hwirq);
+ u64 target_addr = msi->msi_addr + (((8 * group) + reg_set) << 16);
+
+ msg->address_hi = upper_32_bits(target_addr);
+ msg->address_lo = lower_32_bits(target_addr);
+ msg->data = hwirq_to_msi_data(data->hwirq);
+}
+
+/*
+ * X-Gene v1 only has 16 MSI GIC IRQs for 2048 MSI vectors. To maintain
+ * the expected behaviour of .set_affinity for each MSI interrupt, the 16
+ * MSI GIC IRQs are statically allocated to 8 X-Gene v1 cores (2 GIC IRQs
+ * for each core). The MSI vector is moved fom 1 MSI GIC IRQ to another
+ * MSI GIC IRQ to steer its MSI interrupt to correct X-Gene v1 core. As a
+ * consequence, the total MSI vectors that X-Gene v1 supports will be
+ * reduced to 256 (2048/8) vectors.
+ */
+static int hwirq_to_cpu(unsigned long hwirq)
+{
+ return (hwirq % xgene_msi_ctrl.num_cpus);
+}
+
+static unsigned long hwirq_to_canonical_hwirq(unsigned long hwirq)
+{
+ return (hwirq - hwirq_to_cpu(hwirq));
+}
+
+static int xgene_msi_set_affinity(struct irq_data *irqdata,
+ const struct cpumask *mask, bool force)
+{
+ int target_cpu = cpumask_first(mask);
+ int curr_cpu;
+
+ curr_cpu = hwirq_to_cpu(irqdata->hwirq);
+ if (curr_cpu == target_cpu)
+ return IRQ_SET_MASK_OK_DONE;
+
+ /* Update MSI number to target the new CPU */
+ irqdata->hwirq = hwirq_to_canonical_hwirq(irqdata->hwirq) + target_cpu;
+
+ return IRQ_SET_MASK_OK;
+}
+
+static struct irq_chip xgene_msi_bottom_irq_chip = {
+ .name = "MSI",
+ .irq_set_affinity = xgene_msi_set_affinity,
+ .irq_compose_msi_msg = xgene_compose_msi_msg,
+};
+
+static int xgene_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs, void *args)
+{
+ struct xgene_msi *msi = domain->host_data;
+ int msi_irq;
+
+ mutex_lock(&msi->bitmap_lock);
+
+ msi_irq = bitmap_find_next_zero_area(msi->bitmap, NR_MSI_VEC, 0,
+ msi->num_cpus, 0);
+ if (msi_irq < NR_MSI_VEC)
+ bitmap_set(msi->bitmap, msi_irq, msi->num_cpus);
+ else
+ msi_irq = -ENOSPC;
+
+ mutex_unlock(&msi->bitmap_lock);
+
+ if (msi_irq < 0)
+ return msi_irq;
+
+ irq_domain_set_info(domain, virq, msi_irq,
+ &xgene_msi_bottom_irq_chip, domain->host_data,
+ handle_simple_irq, NULL, NULL);
+ set_irq_flags(virq, IRQF_VALID);
+
+ return 0;
+}
+
+static void xgene_irq_domain_free(struct irq_domain *domain,
+ unsigned int virq, unsigned int nr_irqs)
+{
+ struct irq_data *d = irq_domain_get_irq_data(domain, virq);
+ struct xgene_msi *msi = irq_data_get_irq_chip_data(d);
+ u32 hwirq;
+
+ mutex_lock(&msi->bitmap_lock);
+
+ hwirq = hwirq_to_canonical_hwirq(d->hwirq);
+ bitmap_clear(msi->bitmap, hwirq, msi->num_cpus);
+
+ mutex_unlock(&msi->bitmap_lock);
+
+ irq_domain_free_irqs_parent(domain, virq, nr_irqs);
+}
+
+static const struct irq_domain_ops msi_domain_ops = {
+ .alloc = xgene_irq_domain_alloc,
+ .free = xgene_irq_domain_free,
+};
+
+static int xgene_allocate_domains(struct xgene_msi *msi)
+{
+ msi->domain = irq_domain_add_linear(NULL, NR_MSI_VEC,
+ &msi_domain_ops, msi);
+ if (!msi->domain)
+ return -ENOMEM;
+
+ msi->mchip.domain = pci_msi_create_irq_domain(msi->mchip.of_node,
+ &xgene_msi_domain_info,
+ msi->domain);
+
+ if (!msi->mchip.domain) {
+ irq_domain_remove(msi->domain);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void xgene_free_domains(struct xgene_msi *msi)
+{
+ if (msi->mchip.domain)
+ irq_domain_remove(msi->mchip.domain);
+ if (msi->domain)
+ irq_domain_remove(msi->domain);
+}
+
+static int xgene_msi_init_allocator(struct xgene_msi *xgene_msi)
+{
+ int size = BITS_TO_LONGS(NR_MSI_VEC) * sizeof(long);
+
+ xgene_msi->bitmap = kzalloc(size, GFP_KERNEL);
+ if (!xgene_msi->bitmap)
+ return -ENOMEM;
+
+ mutex_init(&xgene_msi->bitmap_lock);
+
+ xgene_msi->msi_groups = kcalloc(NR_HW_IRQS,
+ sizeof(struct xgene_msi_group),
+ GFP_KERNEL);
+ if (!xgene_msi->msi_groups)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void xgene_msi_isr(unsigned int irq, struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct xgene_msi_group *msi_groups;
+ struct xgene_msi *xgene_msi;
+ unsigned int virq;
+ int msir_index, msir_val, hw_irq;
+ u32 intr_index, grp_select, msi_grp;
+
+ chained_irq_enter(chip, desc);
+
+ msi_groups = irq_desc_get_handler_data(desc);
+ xgene_msi = msi_groups->msi;
+ msi_grp = msi_groups->msi_grp;
+
+ /*
+ * MSIINTn (n is 0..F) indicates if there is a pending MSI interrupt
+ * If bit x of this register is set (x is 0..7), one or more interupts
+ * corresponding to MSInIRx is set.
+ */
+ grp_select = xgene_msi_int_read(xgene_msi, msi_grp);
+ while (grp_select) {
+ msir_index = ffs(grp_select) - 1;
+ /*
+ * Calculate MSInIRx address to read to check for interrupts
+ * (refer to termination address and data assignment
+ * described in xgene_compose_msi_msg() )
+ */
+ msir_val = xgene_msi_ir_read(xgene_msi, msi_grp, msir_index);
+ while (msir_val) {
+ intr_index = ffs(msir_val) - 1;
+ /*
+ * Calculate MSI vector number (refer to the termination
+ * address and data assignment described in
+ * xgene_compose_msi_msg function)
+ */
+ hw_irq = (((msir_index * IRQS_PER_IDX) + intr_index) *
+ NR_HW_IRQS) + msi_grp;
+ /*
+ * As we have multiple hw_irq that maps to single MSI,
+ * always look up the virq using the hw_irq as seen from
+ * CPU0
+ */
+ hw_irq = hwirq_to_canonical_hwirq(hw_irq);
+ virq = irq_find_mapping(xgene_msi->domain, hw_irq);
+ WARN_ON(!virq);
+ if (virq != 0)
+ generic_handle_irq(virq);
+ msir_val &= ~(1 << intr_index);
+ }
+ grp_select &= ~(1 << msir_index);
+
+ if (!grp_select) {
+ /*
+ * We handled all interrupts happened in this group,
+ * resample this group MSI_INTx register in case
+ * something else has been made pending in the meantime
+ */
+ grp_select = xgene_msi_int_read(xgene_msi, msi_grp);
+ }
+ }
+
+ chained_irq_exit(chip, desc);
+}
+
+static int xgene_msi_remove(struct platform_device *pdev)
+{
+ int virq, i;
+ struct xgene_msi *msi = platform_get_drvdata(pdev);
+
+ for (i = 0; i < NR_HW_IRQS; i++) {
+ virq = msi->msi_groups[i].gic_irq;
+ if (virq != 0) {
+ irq_set_chained_handler(virq, NULL);
+ irq_set_handler_data(virq, NULL);
+ }
+ }
+ kfree(msi->msi_groups);
+
+ kfree(msi->bitmap);
+ msi->bitmap = NULL;
+
+ xgene_free_domains(msi);
+
+ return 0;
+}
+
+static int xgene_msi_hwirq_alloc(unsigned int cpu)
+{
+ struct xgene_msi *msi = &xgene_msi_ctrl;
+ struct xgene_msi_group *msi_group;
+ cpumask_var_t mask;
+ int i;
+ int err;
+
+ for (i = cpu; i < NR_HW_IRQS; i += msi->num_cpus) {
+ msi_group = &msi->msi_groups[i];
+ if (!msi_group->gic_irq)
+ continue;
+
+ irq_set_chained_handler(msi_group->gic_irq,
+ xgene_msi_isr);
+ err = irq_set_handler_data(msi_group->gic_irq, msi_group);
+ if (err) {
+ pr_err("failed to register GIC IRQ handler\n");
+ return -EINVAL;
+ }
+ /*
+ * Statically allocate MSI GIC IRQs to each CPU core.
+ * With 8-core X-Gene v1, 2 MSI GIC IRQs are allocated
+ * to each core.
+ */
+ if (alloc_cpumask_var(&mask, GFP_KERNEL)) {
+ cpumask_clear(mask);
+ cpumask_set_cpu(cpu, mask);
+ err = irq_set_affinity(msi_group->gic_irq, mask);
+ if (err)
+ pr_err("failed to set affinity for GIC IRQ");
+ free_cpumask_var(mask);
+ } else {
+ pr_err("failed to alloc CPU mask for affinity\n");
+ err = -EINVAL;
+ }
+
+ if (err) {
+ irq_set_chained_handler(msi_group->gic_irq, NULL);
+ irq_set_handler_data(msi_group->gic_irq, NULL);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static void xgene_msi_hwirq_free(unsigned int cpu)
+{
+ struct xgene_msi *msi = &xgene_msi_ctrl;
+ struct xgene_msi_group *msi_group;
+ int i;
+
+ for (i = cpu; i < NR_HW_IRQS; i += msi->num_cpus) {
+ msi_group = &msi->msi_groups[i];
+ if (!msi_group->gic_irq)
+ continue;
+
+ irq_set_chained_handler(msi_group->gic_irq, NULL);
+ irq_set_handler_data(msi_group->gic_irq, NULL);
+ }
+}
+
+static int xgene_msi_cpu_callback(struct notifier_block *nfb,
+ unsigned long action, void *hcpu)
+{
+ unsigned cpu = (unsigned long)hcpu;
+
+ switch (action) {
+ case CPU_ONLINE:
+ case CPU_ONLINE_FROZEN:
+ xgene_msi_hwirq_alloc(cpu);
+ break;
+ case CPU_DEAD:
+ case CPU_DEAD_FROZEN:
+ xgene_msi_hwirq_free(cpu);
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block xgene_msi_cpu_notifier = {
+ .notifier_call = xgene_msi_cpu_callback,
+};
+
+static const struct of_device_id xgene_msi_match_table[] = {
+ {.compatible = "apm,xgene1-msi"},
+ {},
+};
+
+static int xgene_msi_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ int rc, irq_index;
+ struct xgene_msi *xgene_msi;
+ unsigned int cpu;
+ int virt_msir;
+ u32 msi_val, msi_idx;
+
+ xgene_msi = &xgene_msi_ctrl;
+
+ platform_set_drvdata(pdev, xgene_msi);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ xgene_msi->msi_regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(xgene_msi->msi_regs)) {
+ dev_err(&pdev->dev, "no reg space\n");
+ rc = -EINVAL;
+ goto error;
+ }
+ xgene_msi->msi_addr = res->start;
+
+ xgene_msi->num_cpus = num_possible_cpus();
+
+ rc = xgene_msi_init_allocator(xgene_msi);
+ if (rc) {
+ dev_err(&pdev->dev, "Error allocating MSI bitmap\n");
+ goto error;
+ }
+
+ rc = xgene_allocate_domains(xgene_msi);
+ if (rc) {
+ dev_err(&pdev->dev, "Failed to allocate MSI domain\n");
+ goto error;
+ }
+
+ for (irq_index = 0; irq_index < NR_HW_IRQS; irq_index++) {
+ virt_msir = platform_get_irq(pdev, irq_index);
+ if (virt_msir < 0) {
+ dev_err(&pdev->dev, "Cannot translate IRQ index %d\n",
+ irq_index);
+ rc = -EINVAL;
+ goto error;
+ }
+ xgene_msi->msi_groups[irq_index].gic_irq = virt_msir;
+ xgene_msi->msi_groups[irq_index].msi_grp = irq_index;
+ xgene_msi->msi_groups[irq_index].msi = xgene_msi;
+ }
+
+ /*
+ * MSInIRx registers are read-to-clear; before registering
+ * interrupt handlers, read all of them to clear spurious
+ * interrupts that may occur before the driver is probed.
+ */
+ for (irq_index = 0; irq_index < NR_HW_IRQS; irq_index++) {
+ for (msi_idx = 0; msi_idx < IDX_PER_GROUP; msi_idx++)
+ msi_val = xgene_msi_ir_read(xgene_msi, irq_index,
+ msi_idx);
+ /* Read MSIINTn to confirm */
+ msi_val = xgene_msi_int_read(xgene_msi, irq_index);
+ if (msi_val) {
+ dev_err(&pdev->dev, "Failed to clear spurious IRQ\n");
+ rc = -EINVAL;
+ goto error;
+ }
+ }
+
+ cpu_notifier_register_begin();
+
+ for_each_online_cpu(cpu)
+ if (xgene_msi_hwirq_alloc(cpu)) {
+ dev_err(&pdev->dev, "failed to register MSI handlers\n");
+ cpu_notifier_register_done();
+ goto error;
+ }
+
+ rc = __register_hotcpu_notifier(&xgene_msi_cpu_notifier);
+ if (rc) {
+ dev_err(&pdev->dev, "failed to add CPU MSI notifier\n");
+ cpu_notifier_register_done();
+ goto error;
+ }
+
+ cpu_notifier_register_done();
+
+ xgene_msi->mchip.of_node = pdev->dev.of_node;
+ rc = of_pci_msi_chip_add(&xgene_msi->mchip);
+ if (rc) {
+ dev_err(&pdev->dev, "failed to add MSI controller chip\n");
+ goto error_notifier;
+ }
+
+ dev_info(&pdev->dev, "APM X-Gene PCIe MSI driver loaded\n");
+
+ return 0;
+
+error_notifier:
+ unregister_hotcpu_notifier(&xgene_msi_cpu_notifier);
+error:
+ xgene_msi_remove(pdev);
+ return rc;
+}
+
+static struct platform_driver xgene_msi_driver = {
+ .driver = {
+ .name = "xgene-msi",
+ .owner = THIS_MODULE,
+ .of_match_table = xgene_msi_match_table,
+ },
+ .probe = xgene_msi_probe,
+ .remove = xgene_msi_remove,
+};
+
+static int __init xgene_pcie_msi_init(void)
+{
+ return platform_driver_register(&xgene_msi_driver);
+}
+subsys_initcall(xgene_pcie_msi_init);
diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c
index ee082c0366ec..a9dfb70d623a 100644
--- a/drivers/pci/host/pci-xgene.c
+++ b/drivers/pci/host/pci-xgene.c
@@ -59,6 +59,12 @@
#define SZ_1T (SZ_1G*1024ULL)
#define PIPE_PHY_RATE_RD(src) ((0xc000 & (u32)(src)) >> 0xe)
+#define ROOT_CAP_AND_CTRL 0x5C
+
+/* PCIe IP version */
+#define XGENE_PCIE_IP_VER_UNKN 0
+#define XGENE_PCIE_IP_VER_1 1
+
struct xgene_pcie_port {
struct device_node *node;
struct device *dev;
@@ -67,6 +73,7 @@ struct xgene_pcie_port {
void __iomem *cfg_base;
unsigned long cfg_addr;
bool link_up;
+ u32 version;
};
static inline u32 pcie_bar_low_val(u32 addr, u32 flags)
@@ -130,9 +137,7 @@ static bool xgene_pcie_hide_rc_bars(struct pci_bus *bus, int offset)
static void __iomem *xgene_pcie_map_bus(struct pci_bus *bus, unsigned int devfn,
int offset)
{
- struct xgene_pcie_port *port = bus->sysdata;
-
- if ((pci_is_root_bus(bus) && devfn != 0) || !port->link_up ||
+ if ((pci_is_root_bus(bus) && devfn != 0) ||
xgene_pcie_hide_rc_bars(bus, offset))
return NULL;
@@ -140,9 +145,37 @@ static void __iomem *xgene_pcie_map_bus(struct pci_bus *bus, unsigned int devfn,
return xgene_pcie_get_cfg_base(bus) + offset;
}
+static int xgene_pcie_config_read32(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 *val)
+{
+ struct xgene_pcie_port *port = bus->sysdata;
+
+ if (pci_generic_config_read32(bus, devfn, where & ~0x3, 4, val) !=
+ PCIBIOS_SUCCESSFUL)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ /*
+ * The v1 controller has a bug in its Configuration Request
+ * Retry Status (CRS) logic: when CRS is enabled and we read the
+ * Vendor and Device ID of a non-existent device, the controller
+ * fabricates return data of 0xFFFF0001 ("device exists but is not
+ * ready") instead of 0xFFFFFFFF ("device does not exist"). This
+ * causes the PCI core to retry the read until it times out.
+ * Avoid this by not claiming to support CRS.
+ */
+ if (pci_is_root_bus(bus) && (port->version == XGENE_PCIE_IP_VER_1) &&
+ ((where & ~0x3) == ROOT_CAP_AND_CTRL))
+ *val &= ~(PCI_EXP_RTCAP_CRSVIS << 16);
+
+ if (size <= 2)
+ *val = (*val >> (8 * (where & 3))) & ((1 << (size * 8)) - 1);
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
static struct pci_ops xgene_pcie_ops = {
.map_bus = xgene_pcie_map_bus,
- .read = pci_generic_config_read32,
+ .read = xgene_pcie_config_read32,
.write = pci_generic_config_write32,
};
@@ -468,6 +501,23 @@ static int xgene_pcie_setup(struct xgene_pcie_port *port,
return 0;
}
+static int xgene_pcie_msi_enable(struct pci_bus *bus)
+{
+ struct device_node *msi_node;
+
+ msi_node = of_parse_phandle(bus->dev.of_node,
+ "msi-parent", 0);
+ if (!msi_node)
+ return -ENODEV;
+
+ bus->msi = of_pci_find_msi_chip_by_node(msi_node);
+ if (!bus->msi)
+ return -ENODEV;
+
+ bus->msi->dev = &bus->dev;
+ return 0;
+}
+
static int xgene_pcie_probe_bridge(struct platform_device *pdev)
{
struct device_node *dn = pdev->dev.of_node;
@@ -483,6 +533,10 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev)
port->node = of_node_get(pdev->dev.of_node);
port->dev = &pdev->dev;
+ port->version = XGENE_PCIE_IP_VER_UNKN;
+ if (of_device_is_compatible(port->node, "apm,xgene-pcie"))
+ port->version = XGENE_PCIE_IP_VER_1;
+
ret = xgene_pcie_map_reg(port, pdev);
if (ret)
return ret;
@@ -504,6 +558,10 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev)
if (!bus)
return -ENOMEM;
+ if (IS_ENABLED(CONFIG_PCI_MSI))
+ if (xgene_pcie_msi_enable(bus))
+ dev_info(port->dev, "failed to enable MSI\n");
+
pci_scan_child_bus(bus);
pci_assign_unassigned_bus_resources(bus);
pci_bus_add_devices(bus);
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 2e9f84fdd9ce..69486be7181e 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -31,6 +31,7 @@
#define PORT_LINK_MODE_1_LANES (0x1 << 16)
#define PORT_LINK_MODE_2_LANES (0x3 << 16)
#define PORT_LINK_MODE_4_LANES (0x7 << 16)
+#define PORT_LINK_MODE_8_LANES (0xf << 16)
#define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C
#define PORT_LOGIC_SPEED_CHANGE (0x1 << 17)
@@ -38,6 +39,7 @@
#define PORT_LOGIC_LINK_WIDTH_1_LANES (0x1 << 8)
#define PORT_LOGIC_LINK_WIDTH_2_LANES (0x2 << 8)
#define PORT_LOGIC_LINK_WIDTH_4_LANES (0x4 << 8)
+#define PORT_LOGIC_LINK_WIDTH_8_LANES (0x8 << 8)
#define PCIE_MSI_ADDR_LO 0x820
#define PCIE_MSI_ADDR_HI 0x824
@@ -150,6 +152,21 @@ static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
return ret;
}
+static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index,
+ int type, u64 cpu_addr, u64 pci_addr, u32 size)
+{
+ dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | index,
+ PCIE_ATU_VIEWPORT);
+ dw_pcie_writel_rc(pp, lower_32_bits(cpu_addr), PCIE_ATU_LOWER_BASE);
+ dw_pcie_writel_rc(pp, upper_32_bits(cpu_addr), PCIE_ATU_UPPER_BASE);
+ dw_pcie_writel_rc(pp, lower_32_bits(cpu_addr + size - 1),
+ PCIE_ATU_LIMIT);
+ dw_pcie_writel_rc(pp, lower_32_bits(pci_addr), PCIE_ATU_LOWER_TARGET);
+ dw_pcie_writel_rc(pp, upper_32_bits(pci_addr), PCIE_ATU_UPPER_TARGET);
+ dw_pcie_writel_rc(pp, type, PCIE_ATU_CR1);
+ dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
+}
+
static struct irq_chip dw_msi_irq_chip = {
.name = "PCI-MSI",
.irq_enable = pci_msi_unmask_irq,
@@ -493,6 +510,11 @@ int dw_pcie_host_init(struct pcie_port *pp)
if (pp->ops->host_init)
pp->ops->host_init(pp);
+ if (!pp->ops->rd_other_conf)
+ dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
+ PCIE_ATU_TYPE_MEM, pp->mem_mod_base,
+ pp->mem_bus_addr, pp->mem_size);
+
dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
/* program correct class for RC */
@@ -515,115 +537,73 @@ int dw_pcie_host_init(struct pcie_port *pp)
return 0;
}
-static void dw_pcie_prog_viewport_cfg0(struct pcie_port *pp, u32 busdev)
-{
- /* Program viewport 0 : OUTBOUND : CFG0 */
- dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0,
- PCIE_ATU_VIEWPORT);
- dw_pcie_writel_rc(pp, pp->cfg0_mod_base, PCIE_ATU_LOWER_BASE);
- dw_pcie_writel_rc(pp, (pp->cfg0_mod_base >> 32), PCIE_ATU_UPPER_BASE);
- dw_pcie_writel_rc(pp, pp->cfg0_mod_base + pp->cfg0_size - 1,
- PCIE_ATU_LIMIT);
- dw_pcie_writel_rc(pp, busdev, PCIE_ATU_LOWER_TARGET);
- dw_pcie_writel_rc(pp, 0, PCIE_ATU_UPPER_TARGET);
- dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_CFG0, PCIE_ATU_CR1);
- dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
-}
-
-static void dw_pcie_prog_viewport_cfg1(struct pcie_port *pp, u32 busdev)
-{
- /* Program viewport 1 : OUTBOUND : CFG1 */
- dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1,
- PCIE_ATU_VIEWPORT);
- dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_CFG1, PCIE_ATU_CR1);
- dw_pcie_writel_rc(pp, pp->cfg1_mod_base, PCIE_ATU_LOWER_BASE);
- dw_pcie_writel_rc(pp, (pp->cfg1_mod_base >> 32), PCIE_ATU_UPPER_BASE);
- dw_pcie_writel_rc(pp, pp->cfg1_mod_base + pp->cfg1_size - 1,
- PCIE_ATU_LIMIT);
- dw_pcie_writel_rc(pp, busdev, PCIE_ATU_LOWER_TARGET);
- dw_pcie_writel_rc(pp, 0, PCIE_ATU_UPPER_TARGET);
- dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
-}
-
-static void dw_pcie_prog_viewport_mem_outbound(struct pcie_port *pp)
-{
- /* Program viewport 0 : OUTBOUND : MEM */
- dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0,
- PCIE_ATU_VIEWPORT);
- dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_MEM, PCIE_ATU_CR1);
- dw_pcie_writel_rc(pp, pp->mem_mod_base, PCIE_ATU_LOWER_BASE);
- dw_pcie_writel_rc(pp, (pp->mem_mod_base >> 32), PCIE_ATU_UPPER_BASE);
- dw_pcie_writel_rc(pp, pp->mem_mod_base + pp->mem_size - 1,
- PCIE_ATU_LIMIT);
- dw_pcie_writel_rc(pp, pp->mem_bus_addr, PCIE_ATU_LOWER_TARGET);
- dw_pcie_writel_rc(pp, upper_32_bits(pp->mem_bus_addr),
- PCIE_ATU_UPPER_TARGET);
- dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
-}
-
-static void dw_pcie_prog_viewport_io_outbound(struct pcie_port *pp)
-{
- /* Program viewport 1 : OUTBOUND : IO */
- dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1,
- PCIE_ATU_VIEWPORT);
- dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_IO, PCIE_ATU_CR1);
- dw_pcie_writel_rc(pp, pp->io_mod_base, PCIE_ATU_LOWER_BASE);
- dw_pcie_writel_rc(pp, (pp->io_mod_base >> 32), PCIE_ATU_UPPER_BASE);
- dw_pcie_writel_rc(pp, pp->io_mod_base + pp->io_size - 1,
- PCIE_ATU_LIMIT);
- dw_pcie_writel_rc(pp, pp->io_bus_addr, PCIE_ATU_LOWER_TARGET);
- dw_pcie_writel_rc(pp, upper_32_bits(pp->io_bus_addr),
- PCIE_ATU_UPPER_TARGET);
- dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
-}
-
static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u32 devfn, int where, int size, u32 *val)
{
- int ret = PCIBIOS_SUCCESSFUL;
- u32 address, busdev;
+ int ret, type;
+ u32 address, busdev, cfg_size;
+ u64 cpu_addr;
+ void __iomem *va_cfg_base;
busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
PCIE_ATU_FUNC(PCI_FUNC(devfn));
address = where & ~0x3;
if (bus->parent->number == pp->root_bus_nr) {
- dw_pcie_prog_viewport_cfg0(pp, busdev);
- ret = dw_pcie_cfg_read(pp->va_cfg0_base + address, where, size,
- val);
- dw_pcie_prog_viewport_mem_outbound(pp);
+ type = PCIE_ATU_TYPE_CFG0;
+ cpu_addr = pp->cfg0_mod_base;
+ cfg_size = pp->cfg0_size;
+ va_cfg_base = pp->va_cfg0_base;
} else {
- dw_pcie_prog_viewport_cfg1(pp, busdev);
- ret = dw_pcie_cfg_read(pp->va_cfg1_base + address, where, size,
- val);
- dw_pcie_prog_viewport_io_outbound(pp);
+ type = PCIE_ATU_TYPE_CFG1;
+ cpu_addr = pp->cfg1_mod_base;
+ cfg_size = pp->cfg1_size;
+ va_cfg_base = pp->va_cfg1_base;
}
+ dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
+ type, cpu_addr,
+ busdev, cfg_size);
+ ret = dw_pcie_cfg_read(va_cfg_base + address, where, size, val);
+ dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
+ PCIE_ATU_TYPE_IO, pp->io_mod_base,
+ pp->io_bus_addr, pp->io_size);
+
return ret;
}
static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u32 devfn, int where, int size, u32 val)
{
- int ret = PCIBIOS_SUCCESSFUL;
- u32 address, busdev;
+ int ret, type;
+ u32 address, busdev, cfg_size;
+ u64 cpu_addr;
+ void __iomem *va_cfg_base;
busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
PCIE_ATU_FUNC(PCI_FUNC(devfn));
address = where & ~0x3;
if (bus->parent->number == pp->root_bus_nr) {
- dw_pcie_prog_viewport_cfg0(pp, busdev);
- ret = dw_pcie_cfg_write(pp->va_cfg0_base + address, where, size,
- val);
- dw_pcie_prog_viewport_mem_outbound(pp);
+ type = PCIE_ATU_TYPE_CFG0;
+ cpu_addr = pp->cfg0_mod_base;
+ cfg_size = pp->cfg0_size;
+ va_cfg_base = pp->va_cfg0_base;
} else {
- dw_pcie_prog_viewport_cfg1(pp, busdev);
- ret = dw_pcie_cfg_write(pp->va_cfg1_base + address, where, size,
- val);
- dw_pcie_prog_viewport_io_outbound(pp);
+ type = PCIE_ATU_TYPE_CFG1;
+ cpu_addr = pp->cfg1_mod_base;
+ cfg_size = pp->cfg1_size;
+ va_cfg_base = pp->va_cfg1_base;
}
+ dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
+ type, cpu_addr,
+ busdev, cfg_size);
+ ret = dw_pcie_cfg_write(va_cfg_base + address, where, size, val);
+ dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
+ PCIE_ATU_TYPE_IO, pp->io_mod_base,
+ pp->io_bus_addr, pp->io_size);
+
return ret;
}
@@ -728,13 +708,11 @@ static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys)
struct pcie_port *pp = sys_to_pcie(sys);
pp->root_bus_nr = sys->busnr;
- bus = pci_create_root_bus(pp->dev, sys->busnr,
+ bus = pci_scan_root_bus(pp->dev, sys->busnr,
&dw_pcie_ops, sys, &sys->resources);
if (!bus)
return NULL;
- pci_scan_child_bus(bus);
-
if (bus && pp->ops->scan_bus)
pp->ops->scan_bus(pp);
@@ -778,6 +756,9 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
case 4:
val |= PORT_LINK_MODE_4_LANES;
break;
+ case 8:
+ val |= PORT_LINK_MODE_8_LANES;
+ break;
}
dw_pcie_writel_rc(pp, val, PCIE_PORT_LINK_CONTROL);
@@ -794,6 +775,9 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
case 4:
val |= PORT_LOGIC_LINK_WIDTH_4_LANES;
break;
+ case 8:
+ val |= PORT_LOGIC_LINK_WIDTH_8_LANES;
+ break;
}
dw_pcie_writel_rc(pp, val, PCIE_LINK_WIDTH_SPEED_CONTROL);
diff --git a/drivers/pci/host/pcie-iproc-bcma.c b/drivers/pci/host/pcie-iproc-bcma.c
new file mode 100644
index 000000000000..96a7d999fd5e
--- /dev/null
+++ b/drivers/pci/host/pcie-iproc-bcma.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2015 Broadcom Corporation
+ * Copyright (C) 2015 Hauke Mehrtens <hauke@hauke-m.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/phy/phy.h>
+#include <linux/bcma/bcma.h>
+#include <linux/ioport.h>
+
+#include "pcie-iproc.h"
+
+
+/* NS: CLASS field is R/O, and set to wrong 0x200 value */
+static void bcma_pcie2_fixup_class(struct pci_dev *dev)
+{
+ dev->class = PCI_CLASS_BRIDGE_PCI << 8;
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x8011, bcma_pcie2_fixup_class);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x8012, bcma_pcie2_fixup_class);
+
+static int iproc_pcie_bcma_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+ struct pci_sys_data *sys = dev->sysdata;
+ struct iproc_pcie *pcie = sys->private_data;
+ struct bcma_device *bdev = container_of(pcie->dev, struct bcma_device, dev);
+
+ return bcma_core_irq(bdev, 5);
+}
+
+static int iproc_pcie_bcma_probe(struct bcma_device *bdev)
+{
+ struct iproc_pcie *pcie;
+ LIST_HEAD(res);
+ struct resource res_mem;
+ int ret;
+
+ pcie = devm_kzalloc(&bdev->dev, sizeof(*pcie), GFP_KERNEL);
+ if (!pcie)
+ return -ENOMEM;
+
+ pcie->dev = &bdev->dev;
+ bcma_set_drvdata(bdev, pcie);
+
+ pcie->base = bdev->io_addr;
+
+ res_mem.start = bdev->addr_s[0];
+ res_mem.end = bdev->addr_s[0] + SZ_128M - 1;
+ res_mem.name = "PCIe MEM space";
+ res_mem.flags = IORESOURCE_MEM;
+ pci_add_resource(&res, &res_mem);
+
+ pcie->map_irq = iproc_pcie_bcma_map_irq;
+
+ ret = iproc_pcie_setup(pcie, &res);
+ if (ret)
+ dev_err(pcie->dev, "PCIe controller setup failed\n");
+
+ pci_free_resource_list(&res);
+
+ return ret;
+}
+
+static void iproc_pcie_bcma_remove(struct bcma_device *bdev)
+{
+ struct iproc_pcie *pcie = bcma_get_drvdata(bdev);
+
+ iproc_pcie_remove(pcie);
+}
+
+static const struct bcma_device_id iproc_pcie_bcma_table[] = {
+ BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_NS_PCIEG2, BCMA_ANY_REV, BCMA_ANY_CLASS),
+ {},
+};
+MODULE_DEVICE_TABLE(bcma, iproc_pcie_bcma_table);
+
+static struct bcma_driver iproc_pcie_bcma_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = iproc_pcie_bcma_table,
+ .probe = iproc_pcie_bcma_probe,
+ .remove = iproc_pcie_bcma_remove,
+};
+
+static int __init iproc_pcie_bcma_init(void)
+{
+ return bcma_driver_register(&iproc_pcie_bcma_driver);
+}
+module_init(iproc_pcie_bcma_init);
+
+static void __exit iproc_pcie_bcma_exit(void)
+{
+ bcma_driver_unregister(&iproc_pcie_bcma_driver);
+}
+module_exit(iproc_pcie_bcma_exit);
+
+MODULE_AUTHOR("Hauke Mehrtens");
+MODULE_DESCRIPTION("Broadcom iProc PCIe BCMA driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pci/host/pcie-iproc-platform.c b/drivers/pci/host/pcie-iproc-platform.c
index afad6c21fcfa..9aedc8eb2c6e 100644
--- a/drivers/pci/host/pcie-iproc-platform.c
+++ b/drivers/pci/host/pcie-iproc-platform.c
@@ -69,15 +69,15 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
return ret;
}
- pcie->resources = &res;
+ pcie->map_irq = of_irq_parse_and_map_pci;
- ret = iproc_pcie_setup(pcie);
- if (ret) {
+ ret = iproc_pcie_setup(pcie, &res);
+ if (ret)
dev_err(pcie->dev, "PCIe controller setup failed\n");
- return ret;
- }
- return 0;
+ pci_free_resource_list(&res);
+
+ return ret;
}
static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c
index 329e1b54528b..d77481ea553e 100644
--- a/drivers/pci/host/pcie-iproc.c
+++ b/drivers/pci/host/pcie-iproc.c
@@ -183,7 +183,7 @@ static void iproc_pcie_enable(struct iproc_pcie *pcie)
writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN);
}
-int iproc_pcie_setup(struct iproc_pcie *pcie)
+int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
{
int ret;
struct pci_bus *bus;
@@ -211,7 +211,7 @@ int iproc_pcie_setup(struct iproc_pcie *pcie)
pcie->sysdata.private_data = pcie;
bus = pci_create_root_bus(pcie->dev, 0, &iproc_pcie_ops,
- &pcie->sysdata, pcie->resources);
+ &pcie->sysdata, res);
if (!bus) {
dev_err(pcie->dev, "unable to create PCI root bus\n");
ret = -ENOMEM;
@@ -229,7 +229,7 @@ int iproc_pcie_setup(struct iproc_pcie *pcie)
pci_scan_child_bus(bus);
pci_assign_unassigned_bus_resources(bus);
- pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
+ pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
pci_bus_add_devices(bus);
return 0;
diff --git a/drivers/pci/host/pcie-iproc.h b/drivers/pci/host/pcie-iproc.h
index e28075ed1856..ba0a108309cc 100644
--- a/drivers/pci/host/pcie-iproc.h
+++ b/drivers/pci/host/pcie-iproc.h
@@ -29,14 +29,14 @@
struct iproc_pcie {
struct device *dev;
void __iomem *base;
- struct list_head *resources;
struct pci_sys_data sysdata;
struct pci_bus *root_bus;
struct phy *phy;
int irqs[IPROC_PCIE_MAX_NUM_IRQS];
+ int (*map_irq)(const struct pci_dev *, u8, u8);
};
-int iproc_pcie_setup(struct iproc_pcie *pcie);
+int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res);
int iproc_pcie_remove(struct iproc_pcie *pcie);
#endif /* _PCIE_IPROC_H */
diff --git a/drivers/pci/host/pcie-spear13xx.c b/drivers/pci/host/pcie-spear13xx.c
index 020d78890719..dfec4281bd50 100644
--- a/drivers/pci/host/pcie-spear13xx.c
+++ b/drivers/pci/host/pcie-spear13xx.c
@@ -146,10 +146,10 @@ struct pcie_app_reg {
static int spear13xx_pcie_establish_link(struct pcie_port *pp)
{
u32 val;
- int count = 0;
struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pp);
struct pcie_app_reg *app_reg = spear13xx_pcie->app_base;
u32 exp_cap_off = EXP_CAP_ID_OFFSET;
+ unsigned int retries;
if (dw_pcie_link_up(pp)) {
dev_err(pp->dev, "link already up\n");
@@ -201,17 +201,16 @@ static int spear13xx_pcie_establish_link(struct pcie_port *pp)
&app_reg->app_ctrl_0);
/* check if the link is up or not */
- while (!dw_pcie_link_up(pp)) {
- mdelay(100);
- count++;
- if (count == 10) {
- dev_err(pp->dev, "link Fail\n");
- return -EINVAL;
+ for (retries = 0; retries < 10; retries++) {
+ if (dw_pcie_link_up(pp)) {
+ dev_info(pp->dev, "link up\n");
+ return 0;
}
+ mdelay(100);
}
- dev_info(pp->dev, "link up\n");
- return 0;
+ dev_err(pp->dev, "link Fail\n");
+ return -EINVAL;
}
static irqreturn_t spear13xx_pcie_irq_handler(int irq, void *arg)
diff --git a/drivers/pci/hotplug/Makefile b/drivers/pci/hotplug/Makefile
index 4a9aa08b08f1..b616e7588ff4 100644
--- a/drivers/pci/hotplug/Makefile
+++ b/drivers/pci/hotplug/Makefile
@@ -61,9 +61,6 @@ pciehp-objs := pciehp_core.o \
pciehp_ctrl.o \
pciehp_pci.o \
pciehp_hpc.o
-ifdef CONFIG_ACPI
-pciehp-objs += pciehp_acpi.o
-endif
shpchp-objs := shpchp_core.o \
shpchp_ctrl.o \
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index bcb90e4888dd..ff538568a617 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -632,15 +632,14 @@ static void trim_stale_devices(struct pci_dev *dev)
{
struct acpi_device *adev = ACPI_COMPANION(&dev->dev);
struct pci_bus *bus = dev->subordinate;
- bool alive = false;
+ bool alive = dev->ignore_hotplug;
if (adev) {
acpi_status status;
unsigned long long sta;
status = acpi_evaluate_integer(adev->handle, "_STA", NULL, &sta);
- alive = (ACPI_SUCCESS(status) && device_status_valid(sta))
- || dev->ignore_hotplug;
+ alive = alive || (ACPI_SUCCESS(status) && device_status_valid(sta));
}
if (!alive)
alive = pci_device_is_present(dev);
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index b11521953485..57cd1327346f 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -132,11 +132,7 @@ struct controller {
int pciehp_sysfs_enable_slot(struct slot *slot);
int pciehp_sysfs_disable_slot(struct slot *slot);
-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);
+void pciehp_queue_interrupt_event(struct slot *slot, u32 event_type);
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);
@@ -167,21 +163,4 @@ static inline const char *slot_name(struct slot *slot)
return hotplug_slot_name(slot->hotplug_slot);
}
-#ifdef CONFIG_ACPI
-#include <linux/pci-acpi.h>
-
-void __init pciehp_acpi_slot_detection_init(void);
-int pciehp_acpi_slot_detection_check(struct pci_dev *dev);
-
-static inline void pciehp_firmware_init(void)
-{
- pciehp_acpi_slot_detection_init();
-}
-#else
-#define pciehp_firmware_init() do {} while (0)
-static inline int pciehp_acpi_slot_detection_check(struct pci_dev *dev)
-{
- return 0;
-}
-#endif /* CONFIG_ACPI */
#endif /* _PCIEHP_H */
diff --git a/drivers/pci/hotplug/pciehp_acpi.c b/drivers/pci/hotplug/pciehp_acpi.c
deleted file mode 100644
index 93cc9266e8cb..000000000000
--- a/drivers/pci/hotplug/pciehp_acpi.c
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * ACPI related functions for PCI Express Hot Plug driver.
- *
- * Copyright (C) 2008 Kenji Kaneshige
- * Copyright (C) 2008 Fujitsu Limited.
- *
- * All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#include <linux/acpi.h>
-#include <linux/pci.h>
-#include <linux/pci_hotplug.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include "pciehp.h"
-
-#define PCIEHP_DETECT_PCIE (0)
-#define PCIEHP_DETECT_ACPI (1)
-#define PCIEHP_DETECT_AUTO (2)
-#define PCIEHP_DETECT_DEFAULT PCIEHP_DETECT_AUTO
-
-struct dummy_slot {
- u32 number;
- struct list_head list;
-};
-
-static int slot_detection_mode;
-static char *pciehp_detect_mode;
-module_param(pciehp_detect_mode, charp, 0444);
-MODULE_PARM_DESC(pciehp_detect_mode,
- "Slot detection mode: pcie, acpi, auto\n"
- " pcie - Use PCIe based slot detection\n"
- " acpi - Use ACPI for slot detection\n"
- " auto(default) - Auto select mode. Use acpi option if duplicate\n"
- " slot ids are found. Otherwise, use pcie option\n");
-
-int pciehp_acpi_slot_detection_check(struct pci_dev *dev)
-{
- if (slot_detection_mode != PCIEHP_DETECT_ACPI)
- return 0;
- if (acpi_pci_detect_ejectable(ACPI_HANDLE(&dev->dev)))
- return 0;
- return -ENODEV;
-}
-
-static int __init parse_detect_mode(void)
-{
- if (!pciehp_detect_mode)
- return PCIEHP_DETECT_DEFAULT;
- if (!strcmp(pciehp_detect_mode, "pcie"))
- return PCIEHP_DETECT_PCIE;
- if (!strcmp(pciehp_detect_mode, "acpi"))
- return PCIEHP_DETECT_ACPI;
- if (!strcmp(pciehp_detect_mode, "auto"))
- return PCIEHP_DETECT_AUTO;
- warn("bad specifier '%s' for pciehp_detect_mode. Use default\n",
- pciehp_detect_mode);
- return PCIEHP_DETECT_DEFAULT;
-}
-
-static int __initdata dup_slot_id;
-static int __initdata acpi_slot_detected;
-static struct list_head __initdata dummy_slots = LIST_HEAD_INIT(dummy_slots);
-
-/* Dummy driver for duplicate name detection */
-static int __init dummy_probe(struct pcie_device *dev)
-{
- u32 slot_cap;
- acpi_handle handle;
- struct dummy_slot *slot, *tmp;
- struct pci_dev *pdev = dev->port;
-
- pcie_capability_read_dword(pdev, PCI_EXP_SLTCAP, &slot_cap);
- slot = kzalloc(sizeof(*slot), GFP_KERNEL);
- if (!slot)
- return -ENOMEM;
- slot->number = (slot_cap & PCI_EXP_SLTCAP_PSN) >> 19;
- list_for_each_entry(tmp, &dummy_slots, list) {
- if (tmp->number == slot->number)
- dup_slot_id++;
- }
- list_add_tail(&slot->list, &dummy_slots);
- handle = ACPI_HANDLE(&pdev->dev);
- if (!acpi_slot_detected && acpi_pci_detect_ejectable(handle))
- acpi_slot_detected = 1;
- return -ENODEV; /* dummy driver always returns error */
-}
-
-static struct pcie_port_service_driver __initdata dummy_driver = {
- .name = "pciehp_dummy",
- .port_type = PCIE_ANY_PORT,
- .service = PCIE_PORT_SERVICE_HP,
- .probe = dummy_probe,
-};
-
-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);
- list_for_each_entry_safe(slot, tmp, &dummy_slots, list) {
- list_del(&slot->list);
- kfree(slot);
- }
- if (acpi_slot_detected && dup_slot_id)
- return PCIEHP_DETECT_ACPI;
- return PCIEHP_DETECT_PCIE;
-}
-
-void __init pciehp_acpi_slot_detection_init(void)
-{
- slot_detection_mode = parse_detect_mode();
- if (slot_detection_mode != PCIEHP_DETECT_AUTO)
- goto out;
- slot_detection_mode = select_detection_mode();
-out:
- if (slot_detection_mode == PCIEHP_DETECT_ACPI)
- info("Using ACPI for slot detection.\n");
-}
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index 07aa722bb12c..612b21a14df5 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -77,11 +77,6 @@ static int reset_slot (struct hotplug_slot *slot, int probe);
*/
static void release_slot(struct hotplug_slot *hotplug_slot)
{
- struct slot *slot = hotplug_slot->private;
-
- ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
- __func__, hotplug_slot_name(hotplug_slot));
-
kfree(hotplug_slot->ops);
kfree(hotplug_slot->info);
kfree(hotplug_slot);
@@ -129,14 +124,10 @@ static int init_slot(struct controller *ctrl)
slot->hotplug_slot = hotplug;
snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
- ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:00 sun=%x\n",
- pci_domain_nr(ctrl->pcie->port->subordinate),
- ctrl->pcie->port->subordinate->number, PSN(ctrl));
retval = pci_hp_register(hotplug,
ctrl->pcie->port->subordinate, 0, name);
if (retval)
- ctrl_err(ctrl,
- "pci_hp_register failed with error %d\n", retval);
+ ctrl_err(ctrl, "pci_hp_register failed: error %d\n", retval);
out:
if (retval) {
kfree(ops);
@@ -158,9 +149,6 @@ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
{
struct slot *slot = hotplug_slot->private;
- ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
- __func__, slot_name(slot));
-
pciehp_set_attention_status(slot, status);
return 0;
}
@@ -170,9 +158,6 @@ static int enable_slot(struct hotplug_slot *hotplug_slot)
{
struct slot *slot = hotplug_slot->private;
- ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
- __func__, slot_name(slot));
-
return pciehp_sysfs_enable_slot(slot);
}
@@ -181,9 +166,6 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
{
struct slot *slot = hotplug_slot->private;
- ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
- __func__, slot_name(slot));
-
return pciehp_sysfs_disable_slot(slot);
}
@@ -191,9 +173,6 @@ static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
- ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
- __func__, slot_name(slot));
-
pciehp_get_power_status(slot, value);
return 0;
}
@@ -202,9 +181,6 @@ static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
- ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
- __func__, slot_name(slot));
-
pciehp_get_attention_status(slot, value);
return 0;
}
@@ -213,9 +189,6 @@ static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
- ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
- __func__, slot_name(slot));
-
pciehp_get_latch_status(slot, value);
return 0;
}
@@ -224,9 +197,6 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
- ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
- __func__, slot_name(slot));
-
pciehp_get_adapter_status(slot, value);
return 0;
}
@@ -235,9 +205,6 @@ static int reset_slot(struct hotplug_slot *hotplug_slot, int probe)
{
struct slot *slot = hotplug_slot->private;
- ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
- __func__, slot_name(slot));
-
return pciehp_reset_slot(slot, probe);
}
@@ -248,24 +215,21 @@ static int pciehp_probe(struct pcie_device *dev)
struct slot *slot;
u8 occupied, poweron;
- if (pciehp_force)
- dev_info(&dev->device,
- "Bypassing BIOS check for pciehp use on %s\n",
- pci_name(dev->port));
- else if (pciehp_acpi_slot_detection_check(dev->port))
- goto err_out_none;
+ /* If this is not a "hotplug" service, we have no business here. */
+ if (dev->service != PCIE_PORT_SERVICE_HP)
+ return -ENODEV;
if (!dev->port->subordinate) {
/* Can happen if we run out of bus numbers during probe */
dev_err(&dev->device,
"Hotplug bridge without secondary bus, ignoring\n");
- goto err_out_none;
+ return -ENODEV;
}
ctrl = pcie_init(dev);
if (!ctrl) {
dev_err(&dev->device, "Controller initialization failed\n");
- goto err_out_none;
+ return -ENODEV;
}
set_service_data(dev, ctrl);
@@ -275,14 +239,14 @@ static int pciehp_probe(struct pcie_device *dev)
if (rc == -EBUSY)
ctrl_warn(ctrl, "Slot already registered by another hotplug driver\n");
else
- ctrl_err(ctrl, "Slot initialization failed\n");
+ ctrl_err(ctrl, "Slot initialization failed (%d)\n", rc);
goto err_out_release_ctlr;
}
/* Enable events after we have setup the data structures */
rc = pcie_init_notification(ctrl);
if (rc) {
- ctrl_err(ctrl, "Notification initialization failed\n");
+ ctrl_err(ctrl, "Notification initialization failed (%d)\n", rc);
goto err_out_free_ctrl_slot;
}
@@ -305,7 +269,6 @@ err_out_free_ctrl_slot:
cleanup_slot(ctrl);
err_out_release_ctlr:
pciehp_release_ctrl(ctrl);
-err_out_none:
return -ENODEV;
}
@@ -366,7 +329,6 @@ static int __init pcied_init(void)
{
int retval = 0;
- pciehp_firmware_init();
retval = pcie_port_service_register(&hpdriver_portdrv);
dbg("pcie_port_service_register = %d\n", retval);
info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index f052e951b23e..f3796124ad7c 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -37,138 +37,20 @@
static void interrupt_event_handler(struct work_struct *work);
-static int queue_interrupt_event(struct slot *p_slot, u32 event_type)
+void pciehp_queue_interrupt_event(struct slot *p_slot, u32 event_type)
{
struct event_info *info;
info = kmalloc(sizeof(*info), GFP_ATOMIC);
- if (!info)
- return -ENOMEM;
+ if (!info) {
+ ctrl_err(p_slot->ctrl, "dropped event %d (ENOMEM)\n", event_type);
+ return;
+ }
+ INIT_WORK(&info->work, interrupt_event_handler);
info->event_type = event_type;
info->p_slot = p_slot;
- INIT_WORK(&info->work, interrupt_event_handler);
-
queue_work(p_slot->wq, &info->work);
-
- return 0;
-}
-
-u8 pciehp_handle_attention_button(struct slot *p_slot)
-{
- u32 event_type;
- struct controller *ctrl = p_slot->ctrl;
-
- /* Attention Button Change */
- ctrl_dbg(ctrl, "Attention button interrupt received\n");
-
- /*
- * Button pressed - See if need to TAKE ACTION!!!
- */
- ctrl_info(ctrl, "Button pressed on Slot(%s)\n", slot_name(p_slot));
- event_type = INT_BUTTON_PRESS;
-
- queue_interrupt_event(p_slot, event_type);
-
- return 0;
-}
-
-u8 pciehp_handle_switch_change(struct slot *p_slot)
-{
- u8 getstatus;
- u32 event_type;
- struct controller *ctrl = p_slot->ctrl;
-
- /* Switch Change */
- ctrl_dbg(ctrl, "Switch interrupt received\n");
-
- pciehp_get_latch_status(p_slot, &getstatus);
- if (getstatus) {
- /*
- * Switch opened
- */
- ctrl_info(ctrl, "Latch open on Slot(%s)\n", slot_name(p_slot));
- event_type = INT_SWITCH_OPEN;
- } else {
- /*
- * Switch closed
- */
- ctrl_info(ctrl, "Latch close on Slot(%s)\n", slot_name(p_slot));
- event_type = INT_SWITCH_CLOSE;
- }
-
- queue_interrupt_event(p_slot, event_type);
-
- return 1;
-}
-
-u8 pciehp_handle_presence_change(struct slot *p_slot)
-{
- u32 event_type;
- u8 presence_save;
- struct controller *ctrl = p_slot->ctrl;
-
- /* Presence Change */
- ctrl_dbg(ctrl, "Presence/Notify input change\n");
-
- /* Switch is open, assume a presence change
- * Save the presence state
- */
- pciehp_get_adapter_status(p_slot, &presence_save);
- if (presence_save) {
- /*
- * Card Present
- */
- ctrl_info(ctrl, "Card present on Slot(%s)\n", slot_name(p_slot));
- event_type = INT_PRESENCE_ON;
- } else {
- /*
- * Not Present
- */
- ctrl_info(ctrl, "Card not present on Slot(%s)\n",
- slot_name(p_slot));
- event_type = INT_PRESENCE_OFF;
- }
-
- queue_interrupt_event(p_slot, event_type);
-
- return 1;
-}
-
-u8 pciehp_handle_power_fault(struct slot *p_slot)
-{
- u32 event_type;
- struct controller *ctrl = p_slot->ctrl;
-
- /* power fault */
- ctrl_dbg(ctrl, "Power fault interrupt received\n");
- ctrl_err(ctrl, "Power fault on slot %s\n", slot_name(p_slot));
- event_type = INT_POWER_FAULT;
- ctrl_info(ctrl, "Power fault bit %x set\n", 0);
- queue_interrupt_event(p_slot, event_type);
-
- 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
@@ -298,10 +180,6 @@ static void pciehp_power_thread(struct work_struct *work)
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);
@@ -310,10 +188,6 @@ static void pciehp_power_thread(struct work_struct *work)
mutex_unlock(&p_slot->lock);
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);
@@ -416,7 +290,7 @@ static void handle_button_press_event(struct slot *p_slot)
ctrl_info(ctrl, "Button ignore on Slot(%s)\n", slot_name(p_slot));
break;
default:
- ctrl_warn(ctrl, "Not a valid state\n");
+ ctrl_warn(ctrl, "ignoring invalid state %#x\n", p_slot->state);
break;
}
}
@@ -507,8 +381,8 @@ static void handle_link_event(struct slot *p_slot, u32 event)
}
break;
default:
- ctrl_err(ctrl, "Not a valid state on slot(%s)\n",
- slot_name(p_slot));
+ ctrl_err(ctrl, "ignoring invalid state %#x on slot(%s)\n",
+ p_slot->state, slot_name(p_slot));
kfree(info);
break;
}
@@ -532,7 +406,6 @@ static void interrupt_event_handler(struct work_struct *work)
pciehp_green_led_off(p_slot);
break;
case INT_PRESENCE_ON:
- ctrl_dbg(ctrl, "Surprise Insertion\n");
handle_surprise_event(p_slot);
break;
case INT_PRESENCE_OFF:
@@ -540,7 +413,6 @@ static void interrupt_event_handler(struct work_struct *work)
* 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:
@@ -647,8 +519,8 @@ int pciehp_sysfs_enable_slot(struct slot *p_slot)
slot_name(p_slot));
break;
default:
- ctrl_err(ctrl, "Not a valid state on slot %s\n",
- slot_name(p_slot));
+ ctrl_err(ctrl, "invalid state %#x on slot %s\n",
+ p_slot->state, slot_name(p_slot));
break;
}
mutex_unlock(&p_slot->lock);
@@ -682,8 +554,8 @@ int pciehp_sysfs_disable_slot(struct slot *p_slot)
slot_name(p_slot));
break;
default:
- ctrl_err(ctrl, "Not a valid state on slot %s\n",
- slot_name(p_slot));
+ ctrl_err(ctrl, "invalid state %#x on slot %s\n",
+ p_slot->state, slot_name(p_slot));
break;
}
mutex_unlock(&p_slot->lock);
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 0ebf754fc177..2913f7e68a10 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -176,20 +176,17 @@ static void pcie_wait_cmd(struct controller *ctrl)
jiffies_to_msecs(jiffies - ctrl->cmd_started));
}
-/**
- * pcie_write_cmd - Issue controller command
- * @ctrl: controller to which the command is issued
- * @cmd: command value written to slot control register
- * @mask: bitmask of slot control register to be modified
- */
-static void pcie_write_cmd(struct controller *ctrl, u16 cmd, u16 mask)
+static void pcie_do_write_cmd(struct controller *ctrl, u16 cmd,
+ u16 mask, bool wait)
{
struct pci_dev *pdev = ctrl_dev(ctrl);
u16 slot_ctrl;
mutex_lock(&ctrl->ctrl_lock);
- /* Wait for any previous command that might still be in progress */
+ /*
+ * Always wait for any previous command that might still be in progress
+ */
pcie_wait_cmd(ctrl);
pcie_capability_read_word(pdev, PCI_EXP_SLTCTL, &slot_ctrl);
@@ -201,9 +198,33 @@ static void pcie_write_cmd(struct controller *ctrl, u16 cmd, u16 mask)
ctrl->cmd_started = jiffies;
ctrl->slot_ctrl = slot_ctrl;
+ /*
+ * Optionally wait for the hardware to be ready for a new command,
+ * indicating completion of the above issued command.
+ */
+ if (wait)
+ pcie_wait_cmd(ctrl);
+
mutex_unlock(&ctrl->ctrl_lock);
}
+/**
+ * pcie_write_cmd - Issue controller command
+ * @ctrl: controller to which the command is issued
+ * @cmd: command value written to slot control register
+ * @mask: bitmask of slot control register to be modified
+ */
+static void pcie_write_cmd(struct controller *ctrl, u16 cmd, u16 mask)
+{
+ pcie_do_write_cmd(ctrl, cmd, mask, true);
+}
+
+/* Same as above without waiting for the hardware to latch */
+static void pcie_write_cmd_nowait(struct controller *ctrl, u16 cmd, u16 mask)
+{
+ pcie_do_write_cmd(ctrl, cmd, mask, false);
+}
+
bool pciehp_check_link_active(struct controller *ctrl)
{
struct pci_dev *pdev = ctrl_dev(ctrl);
@@ -291,7 +312,8 @@ int pciehp_check_link_status(struct controller *ctrl)
ctrl_dbg(ctrl, "%s: lnk_status = %x\n", __func__, lnk_status);
if ((lnk_status & PCI_EXP_LNKSTA_LT) ||
!(lnk_status & PCI_EXP_LNKSTA_NLW)) {
- ctrl_err(ctrl, "Link Training Error occurs\n");
+ ctrl_err(ctrl, "link training error: status %#06x\n",
+ lnk_status);
return -1;
}
@@ -422,7 +444,7 @@ void pciehp_set_attention_status(struct slot *slot, u8 value)
default:
return;
}
- pcie_write_cmd(ctrl, slot_cmd, PCI_EXP_SLTCTL_AIC);
+ pcie_write_cmd_nowait(ctrl, slot_cmd, PCI_EXP_SLTCTL_AIC);
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd);
}
@@ -434,7 +456,8 @@ void pciehp_green_led_on(struct slot *slot)
if (!PWR_LED(ctrl))
return;
- pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_IND_ON, PCI_EXP_SLTCTL_PIC);
+ pcie_write_cmd_nowait(ctrl, PCI_EXP_SLTCTL_PWR_IND_ON,
+ PCI_EXP_SLTCTL_PIC);
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL,
PCI_EXP_SLTCTL_PWR_IND_ON);
@@ -447,7 +470,8 @@ void pciehp_green_led_off(struct slot *slot)
if (!PWR_LED(ctrl))
return;
- pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF, PCI_EXP_SLTCTL_PIC);
+ pcie_write_cmd_nowait(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
+ PCI_EXP_SLTCTL_PIC);
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL,
PCI_EXP_SLTCTL_PWR_IND_OFF);
@@ -460,7 +484,8 @@ void pciehp_green_led_blink(struct slot *slot)
if (!PWR_LED(ctrl))
return;
- pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_IND_BLINK, PCI_EXP_SLTCTL_PIC);
+ pcie_write_cmd_nowait(ctrl, PCI_EXP_SLTCTL_PWR_IND_BLINK,
+ PCI_EXP_SLTCTL_PIC);
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL,
PCI_EXP_SLTCTL_PWR_IND_BLINK);
@@ -510,6 +535,8 @@ static irqreturn_t pcie_isr(int irq, void *dev_id)
struct pci_dev *dev;
struct slot *slot = ctrl->slot;
u16 detected, intr_loc;
+ u8 open, present;
+ bool link;
/*
* In order to guarantee that all interrupt events are
@@ -532,7 +559,7 @@ static irqreturn_t pcie_isr(int irq, void *dev_id)
intr_loc);
} while (detected);
- ctrl_dbg(ctrl, "%s: intr_loc %x\n", __func__, intr_loc);
+ ctrl_dbg(ctrl, "pending interrupts %#06x from Slot Status\n", intr_loc);
/* Check Command Complete Interrupt Pending */
if (intr_loc & PCI_EXP_SLTSTA_CC) {
@@ -555,25 +582,44 @@ static irqreturn_t pcie_isr(int irq, void *dev_id)
return IRQ_HANDLED;
/* Check MRL Sensor Changed */
- if (intr_loc & PCI_EXP_SLTSTA_MRLSC)
- pciehp_handle_switch_change(slot);
+ if (intr_loc & PCI_EXP_SLTSTA_MRLSC) {
+ pciehp_get_latch_status(slot, &open);
+ ctrl_info(ctrl, "Latch %s on Slot(%s)\n",
+ open ? "open" : "close", slot_name(slot));
+ pciehp_queue_interrupt_event(slot, open ? INT_SWITCH_OPEN :
+ INT_SWITCH_CLOSE);
+ }
/* Check Attention Button Pressed */
- if (intr_loc & PCI_EXP_SLTSTA_ABP)
- pciehp_handle_attention_button(slot);
+ if (intr_loc & PCI_EXP_SLTSTA_ABP) {
+ ctrl_info(ctrl, "Button pressed on Slot(%s)\n",
+ slot_name(slot));
+ pciehp_queue_interrupt_event(slot, INT_BUTTON_PRESS);
+ }
/* Check Presence Detect Changed */
- if (intr_loc & PCI_EXP_SLTSTA_PDC)
- pciehp_handle_presence_change(slot);
+ if (intr_loc & PCI_EXP_SLTSTA_PDC) {
+ pciehp_get_adapter_status(slot, &present);
+ ctrl_info(ctrl, "Card %spresent on Slot(%s)\n",
+ present ? "" : "not ", slot_name(slot));
+ pciehp_queue_interrupt_event(slot, present ? INT_PRESENCE_ON :
+ INT_PRESENCE_OFF);
+ }
/* Check Power Fault Detected */
if ((intr_loc & PCI_EXP_SLTSTA_PFD) && !ctrl->power_fault_detected) {
ctrl->power_fault_detected = 1;
- pciehp_handle_power_fault(slot);
+ ctrl_err(ctrl, "Power fault on slot %s\n", slot_name(slot));
+ pciehp_queue_interrupt_event(slot, INT_POWER_FAULT);
}
- if (intr_loc & PCI_EXP_SLTSTA_DLLSC)
- pciehp_handle_linkstate_change(slot);
+ if (intr_loc & PCI_EXP_SLTSTA_DLLSC) {
+ link = pciehp_check_link_active(ctrl);
+ ctrl_info(ctrl, "slot(%s): Link %s event\n",
+ slot_name(slot), link ? "Up" : "Down");
+ pciehp_queue_interrupt_event(slot, link ? INT_LINK_UP :
+ INT_LINK_DOWN);
+ }
return IRQ_HANDLED;
}
@@ -613,7 +659,7 @@ void pcie_enable_notification(struct controller *ctrl)
PCI_EXP_SLTCTL_HPIE | PCI_EXP_SLTCTL_CCIE |
PCI_EXP_SLTCTL_DLLSCE);
- pcie_write_cmd(ctrl, cmd, mask);
+ pcie_write_cmd_nowait(ctrl, cmd, mask);
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, cmd);
}
@@ -664,7 +710,7 @@ int pciehp_reset_slot(struct slot *slot, int probe)
pci_reset_bridge_secondary_bus(ctrl->pcie->port);
pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, stat_mask);
- pcie_write_cmd(ctrl, ctrl_mask, ctrl_mask);
+ pcie_write_cmd_nowait(ctrl, ctrl_mask, ctrl_mask);
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, ctrl_mask);
if (pciehp_poll_mode)
@@ -724,48 +770,13 @@ static void pcie_cleanup_slot(struct controller *ctrl)
static inline void dbg_ctrl(struct controller *ctrl)
{
- int i;
- u16 reg16;
struct pci_dev *pdev = ctrl->pcie->port;
+ u16 reg16;
if (!pciehp_debug)
return;
- ctrl_info(ctrl, "Hotplug Controller:\n");
- ctrl_info(ctrl, " Seg/Bus/Dev/Func/IRQ : %s IRQ %d\n",
- pci_name(pdev), pdev->irq);
- ctrl_info(ctrl, " Vendor ID : 0x%04x\n", pdev->vendor);
- ctrl_info(ctrl, " Device ID : 0x%04x\n", pdev->device);
- ctrl_info(ctrl, " Subsystem ID : 0x%04x\n",
- pdev->subsystem_device);
- ctrl_info(ctrl, " Subsystem Vendor ID : 0x%04x\n",
- pdev->subsystem_vendor);
- ctrl_info(ctrl, " PCIe Cap offset : 0x%02x\n",
- pci_pcie_cap(pdev));
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- if (!pci_resource_len(pdev, i))
- continue;
- ctrl_info(ctrl, " PCI resource [%d] : %pR\n",
- i, &pdev->resource[i]);
- }
ctrl_info(ctrl, "Slot Capabilities : 0x%08x\n", ctrl->slot_cap);
- ctrl_info(ctrl, " Physical Slot Number : %d\n", PSN(ctrl));
- ctrl_info(ctrl, " Attention Button : %3s\n",
- ATTN_BUTTN(ctrl) ? "yes" : "no");
- ctrl_info(ctrl, " Power Controller : %3s\n",
- POWER_CTRL(ctrl) ? "yes" : "no");
- ctrl_info(ctrl, " MRL Sensor : %3s\n",
- MRL_SENS(ctrl) ? "yes" : "no");
- ctrl_info(ctrl, " Attention Indicator : %3s\n",
- ATTN_LED(ctrl) ? "yes" : "no");
- ctrl_info(ctrl, " Power Indicator : %3s\n",
- PWR_LED(ctrl) ? "yes" : "no");
- ctrl_info(ctrl, " Hot-Plug Surprise : %3s\n",
- HP_SUPR_RM(ctrl) ? "yes" : "no");
- ctrl_info(ctrl, " EMI Present : %3s\n",
- EMI(ctrl) ? "yes" : "no");
- ctrl_info(ctrl, " Command Completed : %3s\n",
- NO_CMD_CMPL(ctrl) ? "no" : "yes");
pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &reg16);
ctrl_info(ctrl, "Slot Status : 0x%04x\n", reg16);
pcie_capability_read_word(pdev, PCI_EXP_SLTCTL, &reg16);
@@ -794,10 +805,8 @@ struct controller *pcie_init(struct pcie_device *dev)
/* Check if Data Link Layer Link Active Reporting is implemented */
pcie_capability_read_dword(pdev, PCI_EXP_LNKCAP, &link_cap);
- if (link_cap & PCI_EXP_LNKCAP_DLLLARC) {
- ctrl_dbg(ctrl, "Link Active Reporting supported\n");
+ if (link_cap & PCI_EXP_LNKCAP_DLLLARC)
ctrl->link_active_reporting = 1;
- }
/* Clear all remaining event bits in Slot Status register */
pcie_capability_write_word(pdev, PCI_EXP_SLTSTA,
@@ -805,13 +814,15 @@ struct controller *pcie_init(struct pcie_device *dev)
PCI_EXP_SLTSTA_MRLSC | PCI_EXP_SLTSTA_PDC |
PCI_EXP_SLTSTA_CC | PCI_EXP_SLTSTA_DLLSC);
- ctrl_info(ctrl, "Slot #%d AttnBtn%c AttnInd%c PwrInd%c PwrCtrl%c MRL%c Interlock%c NoCompl%c LLActRep%c\n",
+ ctrl_info(ctrl, "Slot #%d AttnBtn%c PwrCtrl%c MRL%c AttnInd%c PwrInd%c HotPlug%c Surprise%c Interlock%c NoCompl%c LLActRep%c\n",
(slot_cap & PCI_EXP_SLTCAP_PSN) >> 19,
FLAG(slot_cap, PCI_EXP_SLTCAP_ABP),
- FLAG(slot_cap, PCI_EXP_SLTCAP_AIP),
- FLAG(slot_cap, PCI_EXP_SLTCAP_PIP),
FLAG(slot_cap, PCI_EXP_SLTCAP_PCP),
FLAG(slot_cap, PCI_EXP_SLTCAP_MRLSP),
+ FLAG(slot_cap, PCI_EXP_SLTCAP_AIP),
+ FLAG(slot_cap, PCI_EXP_SLTCAP_PIP),
+ FLAG(slot_cap, PCI_EXP_SLTCAP_HPC),
+ FLAG(slot_cap, PCI_EXP_SLTCAP_HPS),
FLAG(slot_cap, PCI_EXP_SLTCAP_EIP),
FLAG(slot_cap, PCI_EXP_SLTCAP_NCCS),
FLAG(link_cap, PCI_EXP_LNKCAP_DLLLARC));
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index c3e7dfcf9ff5..f66be868ad21 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -185,27 +185,6 @@ void __weak arch_restore_msi_irqs(struct pci_dev *dev)
return default_restore_msi_irqs(dev);
}
-static void msi_set_enable(struct pci_dev *dev, int enable)
-{
- u16 control;
-
- pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
- control &= ~PCI_MSI_FLAGS_ENABLE;
- if (enable)
- control |= PCI_MSI_FLAGS_ENABLE;
- pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control);
-}
-
-static void msix_clear_and_set_ctrl(struct pci_dev *dev, u16 clear, u16 set)
-{
- u16 ctrl;
-
- pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &ctrl);
- ctrl &= ~clear;
- ctrl |= set;
- pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, ctrl);
-}
-
static inline __attribute_const__ u32 msi_mask(unsigned x)
{
/* Don't shift by >= width of type */
@@ -452,7 +431,7 @@ static void __pci_restore_msi_state(struct pci_dev *dev)
entry = irq_get_msi_desc(dev->irq);
pci_intx_for_msi(dev, 0);
- msi_set_enable(dev, 0);
+ pci_msi_set_enable(dev, 0);
arch_restore_msi_irqs(dev);
pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
@@ -473,14 +452,14 @@ static void __pci_restore_msix_state(struct pci_dev *dev)
/* route the table */
pci_intx_for_msi(dev, 0);
- msix_clear_and_set_ctrl(dev, 0,
+ pci_msix_clear_and_set_ctrl(dev, 0,
PCI_MSIX_FLAGS_ENABLE | PCI_MSIX_FLAGS_MASKALL);
arch_restore_msi_irqs(dev);
list_for_each_entry(entry, &dev->msi_list, list)
msix_mask_irq(entry, entry->masked);
- msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_MASKALL, 0);
+ pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_MASKALL, 0);
}
void pci_restore_msi_state(struct pci_dev *dev)
@@ -647,7 +626,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec)
int ret;
unsigned mask;
- msi_set_enable(dev, 0); /* Disable MSI during set up */
+ pci_msi_set_enable(dev, 0); /* Disable MSI during set up */
entry = msi_setup_entry(dev, nvec);
if (!entry)
@@ -683,7 +662,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec)
/* Set MSI enabled bits */
pci_intx_for_msi(dev, 0);
- msi_set_enable(dev, 1);
+ pci_msi_set_enable(dev, 1);
dev->msi_enabled = 1;
dev->irq = entry->irq;
@@ -775,7 +754,7 @@ static int msix_capability_init(struct pci_dev *dev,
void __iomem *base;
/* Ensure MSI-X is disabled while it is set up */
- msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0);
+ pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0);
pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &control);
/* Request & Map MSI-X table region */
@@ -801,7 +780,7 @@ static int msix_capability_init(struct pci_dev *dev,
* MSI-X registers. We need to mask all the vectors to prevent
* interrupts coming in before they're fully set up.
*/
- msix_clear_and_set_ctrl(dev, 0,
+ pci_msix_clear_and_set_ctrl(dev, 0,
PCI_MSIX_FLAGS_MASKALL | PCI_MSIX_FLAGS_ENABLE);
msix_program_entries(dev, entries);
@@ -814,7 +793,7 @@ static int msix_capability_init(struct pci_dev *dev,
pci_intx_for_msi(dev, 0);
dev->msix_enabled = 1;
- msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_MASKALL, 0);
+ pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_MASKALL, 0);
return 0;
@@ -919,7 +898,7 @@ void pci_msi_shutdown(struct pci_dev *dev)
BUG_ON(list_empty(&dev->msi_list));
desc = list_first_entry(&dev->msi_list, struct msi_desc, list);
- msi_set_enable(dev, 0);
+ pci_msi_set_enable(dev, 0);
pci_intx_for_msi(dev, 1);
dev->msi_enabled = 0;
@@ -1027,7 +1006,7 @@ void pci_msix_shutdown(struct pci_dev *dev)
__pci_msix_desc_mask_irq(entry, 1);
}
- msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0);
+ pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0);
pci_intx_for_msi(dev, 1);
dev->msix_enabled = 0;
}
@@ -1062,18 +1041,6 @@ EXPORT_SYMBOL(pci_msi_enabled);
void pci_msi_init_pci_dev(struct pci_dev *dev)
{
INIT_LIST_HEAD(&dev->msi_list);
-
- /* Disable the msi hardware to avoid screaming interrupts
- * during boot. This is the power on reset default so
- * usually this should be a noop.
- */
- dev->msi_cap = pci_find_capability(dev, PCI_CAP_ID_MSI);
- if (dev->msi_cap)
- msi_set_enable(dev, 0);
-
- dev->msix_cap = pci_find_capability(dev, PCI_CAP_ID_MSIX);
- if (dev->msix_cap)
- msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0);
}
/**
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index acc4b6ef78c4..0008c950452c 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3101,39 +3101,6 @@ bool pci_check_and_unmask_intx(struct pci_dev *dev)
}
EXPORT_SYMBOL_GPL(pci_check_and_unmask_intx);
-/**
- * pci_msi_off - disables any MSI or MSI-X capabilities
- * @dev: the PCI device to operate on
- *
- * If you want to use MSI, see pci_enable_msi() and friends.
- * This is a lower-level primitive that allows us to disable
- * MSI operation at the device level.
- */
-void pci_msi_off(struct pci_dev *dev)
-{
- int pos;
- u16 control;
-
- /*
- * This looks like it could go in msi.c, but we need it even when
- * CONFIG_PCI_MSI=n. For the same reason, we can't use
- * dev->msi_cap or dev->msix_cap here.
- */
- pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
- if (pos) {
- pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
- control &= ~PCI_MSI_FLAGS_ENABLE;
- pci_write_config_word(dev, pos + PCI_MSI_FLAGS, control);
- }
- pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
- if (pos) {
- pci_read_config_word(dev, pos + PCI_MSIX_FLAGS, &control);
- control &= ~PCI_MSIX_FLAGS_ENABLE;
- pci_write_config_word(dev, pos + PCI_MSIX_FLAGS, control);
- }
-}
-EXPORT_SYMBOL_GPL(pci_msi_off);
-
int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size)
{
return dma_set_max_seg_size(&dev->dev, size);
@@ -4324,6 +4291,17 @@ bool pci_device_is_present(struct pci_dev *pdev)
}
EXPORT_SYMBOL_GPL(pci_device_is_present);
+void pci_ignore_hotplug(struct pci_dev *dev)
+{
+ struct pci_dev *bridge = dev->bus->self;
+
+ dev->ignore_hotplug = 1;
+ /* Propagate the "ignore hotplug" setting to the parent bridge. */
+ if (bridge)
+ bridge->ignore_hotplug = 1;
+}
+EXPORT_SYMBOL_GPL(pci_ignore_hotplug);
+
#define RESOURCE_ALIGNMENT_PARAM_SIZE COMMAND_LINE_SIZE
static char resource_alignment_param[RESOURCE_ALIGNMENT_PARAM_SIZE] = {0};
static DEFINE_SPINLOCK(resource_alignment_lock);
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 9bd762c237ab..4ff0ff1c4088 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -146,6 +146,27 @@ static inline void pci_no_msi(void) { }
static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
#endif
+static inline void pci_msi_set_enable(struct pci_dev *dev, int enable)
+{
+ u16 control;
+
+ pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
+ control &= ~PCI_MSI_FLAGS_ENABLE;
+ if (enable)
+ control |= PCI_MSI_FLAGS_ENABLE;
+ pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control);
+}
+
+static inline void pci_msix_clear_and_set_ctrl(struct pci_dev *dev, u16 clear, u16 set)
+{
+ u16 ctrl;
+
+ pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &ctrl);
+ ctrl &= ~clear;
+ ctrl |= set;
+ pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, ctrl);
+}
+
void pci_realloc_get_opt(char *);
static inline int pci_no_d1d2(struct pci_dev *dev)
@@ -216,17 +237,6 @@ void __pci_bus_assign_resources(const struct pci_bus *bus,
struct list_head *fail_head);
bool pci_bus_clip_resource(struct pci_dev *dev, int idx);
-/**
- * pci_ari_enabled - query ARI forwarding status
- * @bus: the PCI bus
- *
- * Returns 1 if ARI forwarding is enabled, or 0 if not enabled;
- */
-static inline int pci_ari_enabled(struct pci_bus *bus)
-{
- return bus->self && bus->self->ari_enabled;
-}
-
void pci_reassigndev_resource_alignment(struct pci_dev *dev);
void pci_disable_bridge_window(struct pci_dev *dev);
diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c
index 5653ea94547f..9803e3d039fe 100644
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -425,8 +425,7 @@ static pci_ers_result_t reset_link(struct pci_dev *dev)
if (driver && driver->reset_link) {
status = driver->reset_link(udev);
- } else if (pci_pcie_type(udev) == PCI_EXP_TYPE_DOWNSTREAM ||
- pci_pcie_type(udev) == PCI_EXP_TYPE_ROOT_PORT) {
+ } else if (udev->has_secondary_link) {
status = default_reset_link(udev);
} else {
dev_printk(KERN_DEBUG, &dev->dev,
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index 7d4fcdc512aa..317e3558a35e 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -127,15 +127,12 @@ static void pcie_set_clkpm_nocheck(struct pcie_link_state *link, int enable)
{
struct pci_dev *child;
struct pci_bus *linkbus = link->pdev->subordinate;
+ u32 val = enable ? PCI_EXP_LNKCTL_CLKREQ_EN : 0;
- list_for_each_entry(child, &linkbus->devices, bus_list) {
- if (enable)
- pcie_capability_set_word(child, PCI_EXP_LNKCTL,
- PCI_EXP_LNKCTL_CLKREQ_EN);
- else
- pcie_capability_clear_word(child, PCI_EXP_LNKCTL,
- PCI_EXP_LNKCTL_CLKREQ_EN);
- }
+ list_for_each_entry(child, &linkbus->devices, bus_list)
+ pcie_capability_clear_and_set_word(child, PCI_EXP_LNKCTL,
+ PCI_EXP_LNKCTL_CLKREQ_EN,
+ val);
link->clkpm_enabled = !!enable;
}
@@ -525,7 +522,7 @@ static struct pcie_link_state *alloc_pcie_link_state(struct pci_dev *pdev)
INIT_LIST_HEAD(&link->children);
INIT_LIST_HEAD(&link->link);
link->pdev = pdev;
- if (pci_pcie_type(pdev) == PCI_EXP_TYPE_DOWNSTREAM) {
+ if (pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT) {
struct pcie_link_state *parent;
parent = pdev->bus->parent->self->link_state;
if (!parent) {
@@ -559,10 +556,15 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev)
if (!aspm_support_enabled)
return;
- if (!pci_is_pcie(pdev) || pdev->link_state)
+ if (pdev->link_state)
return;
- if (pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT &&
- pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM)
+
+ /*
+ * We allocate pcie_link_state for the component on the upstream
+ * end of a Link, so there's nothing to do unless this device has a
+ * Link on its secondary side.
+ */
+ if (!pdev->has_secondary_link)
return;
/* VIA has a strange chipset, root port is under a bridge */
@@ -675,10 +677,7 @@ void pcie_aspm_pm_state_change(struct pci_dev *pdev)
{
struct pcie_link_state *link = pdev->link_state;
- if (aspm_disabled || !pci_is_pcie(pdev) || !link)
- return;
- if ((pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT) &&
- (pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM))
+ if (aspm_disabled || !link)
return;
/*
* Devices changed PM state, we should recheck if latency
@@ -696,16 +695,12 @@ void pcie_aspm_powersave_config_link(struct pci_dev *pdev)
{
struct pcie_link_state *link = pdev->link_state;
- if (aspm_disabled || !pci_is_pcie(pdev) || !link)
+ if (aspm_disabled || !link)
return;
if (aspm_policy != POLICY_POWERSAVE)
return;
- if ((pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT) &&
- (pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM))
- return;
-
down_read(&pci_bus_sem);
mutex_lock(&aspm_lock);
pcie_config_aspm_path(link);
@@ -714,8 +709,7 @@ void pcie_aspm_powersave_config_link(struct pci_dev *pdev)
up_read(&pci_bus_sem);
}
-static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem,
- bool force)
+static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem)
{
struct pci_dev *parent = pdev->bus->self;
struct pcie_link_state *link;
@@ -723,8 +717,7 @@ static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem,
if (!pci_is_pcie(pdev))
return;
- if (pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT ||
- pci_pcie_type(pdev) == PCI_EXP_TYPE_DOWNSTREAM)
+ if (pdev->has_secondary_link)
parent = pdev;
if (!parent || !parent->link_state)
return;
@@ -737,7 +730,7 @@ static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem,
* a similar mechanism using "PciASPMOptOut", which is also
* ignored in this situation.
*/
- if (aspm_disabled && !force) {
+ if (aspm_disabled) {
dev_warn(&pdev->dev, "can't disable ASPM; OS doesn't have ASPM control\n");
return;
}
@@ -763,7 +756,7 @@ static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem,
void pci_disable_link_state_locked(struct pci_dev *pdev, int state)
{
- __pci_disable_link_state(pdev, state, false, false);
+ __pci_disable_link_state(pdev, state, false);
}
EXPORT_SYMBOL(pci_disable_link_state_locked);
@@ -778,7 +771,7 @@ EXPORT_SYMBOL(pci_disable_link_state_locked);
*/
void pci_disable_link_state(struct pci_dev *pdev, int state)
{
- __pci_disable_link_state(pdev, state, true, false);
+ __pci_disable_link_state(pdev, state, true);
}
EXPORT_SYMBOL(pci_disable_link_state);
@@ -907,9 +900,7 @@ void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev)
{
struct pcie_link_state *link_state = pdev->link_state;
- if (!pci_is_pcie(pdev) ||
- (pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT &&
- pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM) || !link_state)
+ if (!link_state)
return;
if (link_state->aspm_support)
@@ -924,9 +915,7 @@ void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev)
{
struct pcie_link_state *link_state = pdev->link_state;
- if (!pci_is_pcie(pdev) ||
- (pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT &&
- pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM) || !link_state)
+ if (!link_state)
return;
if (link_state->aspm_support)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 6675a7a1b9fc..cefd636681b6 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -254,8 +254,8 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
}
if (res->flags & IORESOURCE_MEM_64) {
- if ((sizeof(dma_addr_t) < 8 || sizeof(resource_size_t) < 8) &&
- sz64 > 0x100000000ULL) {
+ if ((sizeof(pci_bus_addr_t) < 8 || sizeof(resource_size_t) < 8)
+ && sz64 > 0x100000000ULL) {
res->flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED;
res->start = 0;
res->end = 0;
@@ -264,7 +264,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
goto out;
}
- if ((sizeof(dma_addr_t) < 8) && l) {
+ if ((sizeof(pci_bus_addr_t) < 8) && l) {
/* Above 32-bit boundary; try to reallocate */
res->flags |= IORESOURCE_UNSET;
res->start = 0;
@@ -399,7 +399,7 @@ static void pci_read_bridge_mmio_pref(struct pci_bus *child)
struct pci_dev *dev = child->self;
u16 mem_base_lo, mem_limit_lo;
u64 base64, limit64;
- dma_addr_t base, limit;
+ pci_bus_addr_t base, limit;
struct pci_bus_region region;
struct resource *res;
@@ -426,8 +426,8 @@ static void pci_read_bridge_mmio_pref(struct pci_bus *child)
}
}
- base = (dma_addr_t) base64;
- limit = (dma_addr_t) limit64;
+ base = (pci_bus_addr_t) base64;
+ limit = (pci_bus_addr_t) limit64;
if (base != base64) {
dev_err(&dev->dev, "can't handle bridge window above 4GB (bus address %#010llx)\n",
@@ -973,6 +973,8 @@ void set_pcie_port_type(struct pci_dev *pdev)
{
int pos;
u16 reg16;
+ int type;
+ struct pci_dev *parent;
pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
if (!pos)
@@ -982,6 +984,22 @@ void set_pcie_port_type(struct pci_dev *pdev)
pdev->pcie_flags_reg = reg16;
pci_read_config_word(pdev, pos + PCI_EXP_DEVCAP, &reg16);
pdev->pcie_mpss = reg16 & PCI_EXP_DEVCAP_PAYLOAD;
+
+ /*
+ * A Root Port is always the upstream end of a Link. No PCIe
+ * component has two Links. Two Links are connected by a Switch
+ * that has a Port on each Link and internal logic to connect the
+ * two Ports.
+ */
+ type = pci_pcie_type(pdev);
+ if (type == PCI_EXP_TYPE_ROOT_PORT)
+ pdev->has_secondary_link = 1;
+ else if (type == PCI_EXP_TYPE_UPSTREAM ||
+ type == PCI_EXP_TYPE_DOWNSTREAM) {
+ parent = pci_upstream_bridge(pdev);
+ if (!parent->has_secondary_link)
+ pdev->has_secondary_link = 1;
+ }
}
void set_pcie_hotplug_bridge(struct pci_dev *pdev)
@@ -1085,6 +1103,22 @@ int pci_cfg_space_size(struct pci_dev *dev)
#define LEGACY_IO_RESOURCE (IORESOURCE_IO | IORESOURCE_PCI_FIXED)
+static void pci_msi_setup_pci_dev(struct pci_dev *dev)
+{
+ /*
+ * Disable the MSI hardware to avoid screaming interrupts
+ * during boot. This is the power on reset default so
+ * usually this should be a noop.
+ */
+ dev->msi_cap = pci_find_capability(dev, PCI_CAP_ID_MSI);
+ if (dev->msi_cap)
+ pci_msi_set_enable(dev, 0);
+
+ dev->msix_cap = pci_find_capability(dev, PCI_CAP_ID_MSIX);
+ if (dev->msix_cap)
+ pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0);
+}
+
/**
* pci_setup_device - fill in class and map information of a device
* @dev: the device structure to fill
@@ -1140,6 +1174,8 @@ int pci_setup_device(struct pci_dev *dev)
/* "Unknown power state" */
dev->current_state = PCI_UNKNOWN;
+ pci_msi_setup_pci_dev(dev);
+
/* Early fixups, before probing the BARs */
pci_fixup_device(pci_fixup_early, dev);
/* device class may be changed after fixup */
@@ -1611,7 +1647,7 @@ static int only_one_child(struct pci_bus *bus)
return 0;
if (pci_pcie_type(parent) == PCI_EXP_TYPE_ROOT_PORT)
return 1;
- if (pci_pcie_type(parent) == PCI_EXP_TYPE_DOWNSTREAM &&
+ if (parent->has_secondary_link &&
!pci_has_flag(PCI_SCAN_ALL_PCIE_DEVS))
return 1;
return 0;
@@ -2094,25 +2130,6 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
}
EXPORT_SYMBOL(pci_scan_root_bus);
-/* Deprecated; use pci_scan_root_bus() instead */
-struct pci_bus *pci_scan_bus_parented(struct device *parent,
- int bus, struct pci_ops *ops, void *sysdata)
-{
- LIST_HEAD(resources);
- struct pci_bus *b;
-
- pci_add_resource(&resources, &ioport_resource);
- pci_add_resource(&resources, &iomem_resource);
- pci_add_resource(&resources, &busn_resource);
- b = pci_create_root_bus(parent, bus, ops, sysdata, &resources);
- if (b)
- pci_scan_child_bus(b);
- else
- pci_free_resource_list(&resources);
- return b;
-}
-EXPORT_SYMBOL(pci_scan_bus_parented);
-
struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,
void *sysdata)
{
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 2890ad7cf7c6..e9fd0e90fa3b 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1593,7 +1593,6 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EESSC, quirk_a
static void quirk_pcie_mch(struct pci_dev *pdev)
{
- pci_msi_off(pdev);
pdev->no_msi = 1;
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, quirk_pcie_mch);
@@ -1607,7 +1606,6 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quir
*/
static void quirk_pcie_pxh(struct pci_dev *dev)
{
- pci_msi_off(dev);
dev->no_msi = 1;
dev_warn(&dev->dev, "PXH quirk detected; SHPC device MSI disabled\n");
}
@@ -3565,6 +3563,8 @@ static void quirk_dma_func1_alias(struct pci_dev *dev)
* SKUs this function is not present, making this a ghost requester.
* https://bugzilla.kernel.org/show_bug.cgi?id=42679
*/
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9120,
+ quirk_dma_func1_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9123,
quirk_dma_func1_alias);
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c14 */
@@ -3733,6 +3733,8 @@ static const u16 pci_quirk_intel_pch_acs_ids[] = {
/* Wellsburg (X99) PCH */
0x8d10, 0x8d11, 0x8d12, 0x8d13, 0x8d14, 0x8d15, 0x8d16, 0x8d17,
0x8d18, 0x8d19, 0x8d1a, 0x8d1b, 0x8d1c, 0x8d1d, 0x8d1e,
+ /* Lynx Point (9 series) PCH */
+ 0x8c90, 0x8c92, 0x8c94, 0x8c96, 0x8c98, 0x8c9a, 0x8c9c, 0x8c9e,
};
static bool pci_quirk_intel_pch_acs_match(struct pci_dev *dev)
diff --git a/drivers/pci/vc.c b/drivers/pci/vc.c
index 7e1304d2e389..dfbab61a1b47 100644
--- a/drivers/pci/vc.c
+++ b/drivers/pci/vc.c
@@ -108,8 +108,7 @@ static void pci_vc_enable(struct pci_dev *dev, int pos, int res)
struct pci_dev *link = NULL;
/* Enable VCs from the downstream device */
- if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT ||
- pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM)
+ if (!dev->has_secondary_link)
return;
ctrl_pos = pos + PCI_VC_RES_CTRL + (res * PCI_CAP_VC_PER_VC_SIZEOF);
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index 7cfd2db02deb..240f38872085 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -446,9 +446,15 @@ static int pcifront_scan_root(struct pcifront_device *pdev,
unsigned int domain, unsigned int bus)
{
struct pci_bus *b;
+ LIST_HEAD(resources);
struct pcifront_sd *sd = NULL;
struct pci_bus_entry *bus_entry = NULL;
int err = 0;
+ static struct resource busn_res = {
+ .start = 0,
+ .end = 255,
+ .flags = IORESOURCE_BUS,
+ };
#ifndef CONFIG_PCI_DOMAINS
if (domain != 0) {
@@ -470,17 +476,21 @@ static int pcifront_scan_root(struct pcifront_device *pdev,
err = -ENOMEM;
goto err_out;
}
+ pci_add_resource(&resources, &ioport_resource);
+ pci_add_resource(&resources, &iomem_resource);
+ pci_add_resource(&resources, &busn_res);
pcifront_init_sd(sd, domain, bus, pdev);
pci_lock_rescan_remove();
- b = pci_scan_bus_parented(&pdev->xdev->dev, bus,
- &pcifront_bus_ops, sd);
+ b = pci_scan_root_bus(&pdev->xdev->dev, bus,
+ &pcifront_bus_ops, sd, &resources);
if (!b) {
dev_err(&pdev->xdev->dev,
"Error creating PCI Frontend Bus!\n");
err = -ENOMEM;
pci_unlock_rescan_remove();
+ pci_free_resource_list(&resources);
goto err_out;
}
@@ -488,7 +498,7 @@ static int pcifront_scan_root(struct pcifront_device *pdev,
list_add(&bus_entry->list, &pdev->root_buses);
- /* pci_scan_bus_parented skips devices which do not have a have
+ /* pci_scan_root_bus skips devices which do not have a
* devfn==0. The pcifront_scan_bus enumerates all devfn. */
err = pcifront_scan_bus(pdev, domain, bus, b);