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-rw-r--r--arch/x86/pci/fixup.c15
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_device.c4
-rw-r--r--drivers/gpu/drm/radeon/radeon_device.c11
-rw-r--r--drivers/pci/dwc/pci-imx6.c33
-rw-r--r--drivers/pci/endpoint/Kconfig1
-rw-r--r--drivers/pci/pci-driver.c1
-rw-r--r--drivers/pci/pci.c25
-rw-r--r--drivers/pci/quirks.c13
-rw-r--r--drivers/pci/switch/switchtec.c16
-rw-r--r--include/linux/pci.h5
10 files changed, 86 insertions, 38 deletions
diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c
index 6d52b94..2259acd 100644
--- a/arch/x86/pci/fixup.c
+++ b/arch/x86/pci/fixup.c
@@ -571,3 +571,18 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2fc0, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6f60, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fa0, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fc0, pci_invalid_bar);
+
+/*
+ * Device [1022:7808]
+ * 23. USB Wake on Connect/Disconnect with Low Speed Devices
+ * https://support.amd.com/TechDocs/46837.pdf
+ * Appendix A2
+ * https://support.amd.com/TechDocs/42413.pdf
+ */
+static void pci_fixup_amd_ehci_pme(struct pci_dev *dev)
+{
+ dev_info(&dev->dev, "PME# does not work under D3, disabling it\n");
+ dev->pme_support &= ~((PCI_PM_CAP_PME_D3 | PCI_PM_CAP_PME_D3cold)
+ >> PCI_PM_CAP_PME_SHIFT);
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x7808, pci_fixup_amd_ehci_pme);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 43ca16b..bbac5d5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1152,16 +1152,12 @@ static void amdgpu_switcheroo_set_state(struct pci_dev *pdev, enum vga_switchero
return;
if (state == VGA_SWITCHEROO_ON) {
- unsigned d3_delay = dev->pdev->d3_delay;
-
pr_info("amdgpu: switched on\n");
/* don't suspend or resume card normally */
dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
amdgpu_device_resume(dev, true, true);
- dev->pdev->d3_delay = d3_delay;
-
dev->switch_power_state = DRM_SWITCH_POWER_ON;
drm_kms_helper_poll_enable(dev);
} else {
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 6ecf427..aecaafb 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -113,7 +113,6 @@ static inline bool radeon_is_atpx_hybrid(void) { return false; }
#endif
#define RADEON_PX_QUIRK_DISABLE_PX (1 << 0)
-#define RADEON_PX_QUIRK_LONG_WAKEUP (1 << 1)
struct radeon_px_quirk {
u32 chip_vendor;
@@ -136,8 +135,6 @@ static struct radeon_px_quirk radeon_px_quirk_list[] = {
* https://bugzilla.kernel.org/show_bug.cgi?id=51381
*/
{ PCI_VENDOR_ID_ATI, 0x6840, 0x1043, 0x2122, RADEON_PX_QUIRK_DISABLE_PX },
- /* macbook pro 8.2 */
- { PCI_VENDOR_ID_ATI, 0x6741, PCI_VENDOR_ID_APPLE, 0x00e2, RADEON_PX_QUIRK_LONG_WAKEUP },
{ 0, 0, 0, 0, 0 },
};
@@ -1241,25 +1238,17 @@ static void radeon_check_arguments(struct radeon_device *rdev)
static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
{
struct drm_device *dev = pci_get_drvdata(pdev);
- struct radeon_device *rdev = dev->dev_private;
if (radeon_is_px(dev) && state == VGA_SWITCHEROO_OFF)
return;
if (state == VGA_SWITCHEROO_ON) {
- unsigned d3_delay = dev->pdev->d3_delay;
-
pr_info("radeon: switched on\n");
/* don't suspend or resume card normally */
dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
- if (d3_delay < 20 && (rdev->px_quirk_flags & RADEON_PX_QUIRK_LONG_WAKEUP))
- dev->pdev->d3_delay = 20;
-
radeon_resume_kms(dev, true, true);
- dev->pdev->d3_delay = d3_delay;
-
dev->switch_power_state = DRM_SWITCH_POWER_ON;
drm_kms_helper_poll_enable(dev);
} else {
diff --git a/drivers/pci/dwc/pci-imx6.c b/drivers/pci/dwc/pci-imx6.c
index a98cba5..19a289b 100644
--- a/drivers/pci/dwc/pci-imx6.c
+++ b/drivers/pci/dwc/pci-imx6.c
@@ -252,7 +252,34 @@ static void imx6_pcie_reset_phy(struct imx6_pcie *imx6_pcie)
static int imx6q_pcie_abort_handler(unsigned long addr,
unsigned int fsr, struct pt_regs *regs)
{
- return 0;
+ unsigned long pc = instruction_pointer(regs);
+ unsigned long instr = *(unsigned long *)pc;
+ int reg = (instr >> 12) & 15;
+
+ /*
+ * If the instruction being executed was a read,
+ * make it look like it read all-ones.
+ */
+ if ((instr & 0x0c100000) == 0x04100000) {
+ unsigned long val;
+
+ if (instr & 0x00400000)
+ val = 255;
+ else
+ val = -1;
+
+ regs->uregs[reg] = val;
+ regs->ARM_pc += 4;
+ return 0;
+ }
+
+ if ((instr & 0x0e100090) == 0x00100090) {
+ regs->uregs[reg] = -1;
+ regs->ARM_pc += 4;
+ return 0;
+ }
+
+ return 1;
}
static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
@@ -819,8 +846,8 @@ static int __init imx6_pcie_init(void)
* we can install the handler here without risking it
* accessing some uninitialized driver state.
*/
- hook_fault_code(16 + 6, imx6q_pcie_abort_handler, SIGBUS, 0,
- "imprecise external abort");
+ hook_fault_code(8, imx6q_pcie_abort_handler, SIGBUS, 0,
+ "external abort on non-linefetch");
return platform_driver_register(&imx6_pcie_driver);
}
diff --git a/drivers/pci/endpoint/Kconfig b/drivers/pci/endpoint/Kconfig
index c23f146..c09623c 100644
--- a/drivers/pci/endpoint/Kconfig
+++ b/drivers/pci/endpoint/Kconfig
@@ -6,6 +6,7 @@ menu "PCI Endpoint"
config PCI_ENDPOINT
bool "PCI Endpoint Support"
+ depends on HAS_DMA
help
Enable this configuration option to support configurable PCI
endpoint. This should be enabled if the platform has a PCI
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 192e7b6..b399fa3 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -964,6 +964,7 @@ static int pci_pm_thaw_noirq(struct device *dev)
return pci_legacy_resume_early(dev);
pci_update_current_state(pci_dev, PCI_D0);
+ pci_restore_state(pci_dev);
if (drv && drv->pm && drv->pm->thaw_noirq)
error = drv->pm->thaw_noirq(dev);
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 7c4e1aa..59f29e3 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1960,12 +1960,13 @@ EXPORT_SYMBOL(pci_wake_from_d3);
/**
* pci_target_state - find an appropriate low power state for a given PCI dev
* @dev: PCI device
+ * @wakeup: Whether or not wakeup functionality will be enabled for the device.
*
* Use underlying platform code to find a supported low power state for @dev.
* If the platform can't manage @dev, return the deepest state from which it
* can generate wake events, based on any available PME info.
*/
-static pci_power_t pci_target_state(struct pci_dev *dev)
+static pci_power_t pci_target_state(struct pci_dev *dev, bool wakeup)
{
pci_power_t target_state = PCI_D3hot;
@@ -2002,7 +2003,7 @@ static pci_power_t pci_target_state(struct pci_dev *dev)
if (dev->current_state == PCI_D3cold)
target_state = PCI_D3cold;
- if (device_may_wakeup(&dev->dev)) {
+ if (wakeup) {
/*
* Find the deepest state from which the device can generate
* wake-up events, make it the target state and enable device
@@ -2028,13 +2029,14 @@ static pci_power_t pci_target_state(struct pci_dev *dev)
*/
int pci_prepare_to_sleep(struct pci_dev *dev)
{
- pci_power_t target_state = pci_target_state(dev);
+ bool wakeup = device_may_wakeup(&dev->dev);
+ pci_power_t target_state = pci_target_state(dev, wakeup);
int error;
if (target_state == PCI_POWER_ERROR)
return -EIO;
- pci_enable_wake(dev, target_state, device_may_wakeup(&dev->dev));
+ pci_enable_wake(dev, target_state, wakeup);
error = pci_set_power_state(dev, target_state);
@@ -2067,9 +2069,10 @@ EXPORT_SYMBOL(pci_back_from_sleep);
*/
int pci_finish_runtime_suspend(struct pci_dev *dev)
{
- pci_power_t target_state = pci_target_state(dev);
+ pci_power_t target_state;
int error;
+ target_state = pci_target_state(dev, device_can_wakeup(&dev->dev));
if (target_state == PCI_POWER_ERROR)
return -EIO;
@@ -2105,8 +2108,8 @@ bool pci_dev_run_wake(struct pci_dev *dev)
if (!dev->pme_support)
return false;
- /* PME-capable in principle, but not from the intended sleep state */
- if (!pci_pme_capable(dev, pci_target_state(dev)))
+ /* PME-capable in principle, but not from the target power state */
+ if (!pci_pme_capable(dev, pci_target_state(dev, false)))
return false;
while (bus->parent) {
@@ -2141,10 +2144,12 @@ EXPORT_SYMBOL_GPL(pci_dev_run_wake);
bool pci_dev_keep_suspended(struct pci_dev *pci_dev)
{
struct device *dev = &pci_dev->dev;
+ bool wakeup = device_may_wakeup(dev);
if (!pm_runtime_suspended(dev)
- || pci_target_state(pci_dev) != pci_dev->current_state
- || platform_pci_need_resume(pci_dev))
+ || pci_target_state(pci_dev, wakeup) != pci_dev->current_state
+ || platform_pci_need_resume(pci_dev)
+ || (pci_dev->dev_flags & PCI_DEV_FLAGS_NEEDS_RESUME))
return false;
/*
@@ -2160,7 +2165,7 @@ bool pci_dev_keep_suspended(struct pci_dev *pci_dev)
spin_lock_irq(&dev->power.lock);
if (pm_runtime_suspended(dev) && pci_dev->current_state < PCI_D3cold &&
- !device_may_wakeup(dev))
+ !wakeup)
__pci_pme_active(pci_dev, false);
spin_unlock_irq(&dev->power.lock);
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 16e6cd8..e1deb79 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1684,6 +1684,19 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2609, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x260a, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x260b, quirk_intel_pcie_pm);
+static void quirk_radeon_pm(struct pci_dev *dev)
+{
+ if (dev->subsystem_vendor == PCI_VENDOR_ID_APPLE &&
+ dev->subsystem_device == 0x00e2) {
+ if (dev->d3_delay < 20) {
+ dev->d3_delay = 20;
+ dev_info(&dev->dev, "extending delay after power-on from D3 to %d msec\n",
+ dev->d3_delay);
+ }
+ }
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6741, quirk_radeon_pm);
+
#ifdef CONFIG_X86_IO_APIC
static int dmi_disable_ioapicreroute(const struct dmi_system_id *d)
{
diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index cc6e085..f6a6340 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -1291,7 +1291,6 @@ static struct switchtec_dev *stdev_create(struct pci_dev *pdev)
cdev = &stdev->cdev;
cdev_init(cdev, &switchtec_fops);
cdev->owner = THIS_MODULE;
- cdev->kobj.parent = &dev->kobj;
return stdev;
@@ -1442,12 +1441,15 @@ static int switchtec_init_pci(struct switchtec_dev *stdev,
stdev->mmio_sys_info = stdev->mmio + SWITCHTEC_GAS_SYS_INFO_OFFSET;
stdev->mmio_flash_info = stdev->mmio + SWITCHTEC_GAS_FLASH_INFO_OFFSET;
stdev->mmio_ntb = stdev->mmio + SWITCHTEC_GAS_NTB_OFFSET;
- stdev->partition = ioread8(&stdev->mmio_ntb->partition_id);
+ stdev->partition = ioread8(&stdev->mmio_sys_info->partition_id);
stdev->partition_count = ioread8(&stdev->mmio_ntb->partition_count);
stdev->mmio_part_cfg_all = stdev->mmio + SWITCHTEC_GAS_PART_CFG_OFFSET;
stdev->mmio_part_cfg = &stdev->mmio_part_cfg_all[stdev->partition];
stdev->mmio_pff_csr = stdev->mmio + SWITCHTEC_GAS_PFF_CSR_OFFSET;
+ if (stdev->partition_count < 1)
+ stdev->partition_count = 1;
+
init_pff(stdev);
pci_set_drvdata(pdev, stdev);
@@ -1479,11 +1481,7 @@ static int switchtec_pci_probe(struct pci_dev *pdev,
SWITCHTEC_EVENT_EN_IRQ,
&stdev->mmio_part_cfg->mrpc_comp_hdr);
- rc = cdev_add(&stdev->cdev, stdev->dev.devt, 1);
- if (rc)
- goto err_put;
-
- rc = device_add(&stdev->dev);
+ rc = cdev_device_add(&stdev->cdev, &stdev->dev);
if (rc)
goto err_devadd;
@@ -1492,7 +1490,6 @@ static int switchtec_pci_probe(struct pci_dev *pdev,
return 0;
err_devadd:
- cdev_del(&stdev->cdev);
stdev_kill(stdev);
err_put:
ida_simple_remove(&switchtec_minor_ida, MINOR(stdev->dev.devt));
@@ -1506,8 +1503,7 @@ static void switchtec_pci_remove(struct pci_dev *pdev)
pci_set_drvdata(pdev, NULL);
- device_del(&stdev->dev);
- cdev_del(&stdev->cdev);
+ cdev_device_del(&stdev->cdev, &stdev->dev);
ida_simple_remove(&switchtec_minor_ida, MINOR(stdev->dev.devt));
dev_info(&stdev->dev, "unregistered.\n");
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 4f0613d..a8acc5e 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -183,6 +183,11 @@ enum pci_dev_flags {
PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9),
/* Do not use FLR even if device advertises PCI_AF_CAP */
PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
+ /*
+ * Resume before calling the driver's system suspend hooks, disabling
+ * the direct_complete optimization.
+ */
+ PCI_DEV_FLAGS_NEEDS_RESUME = (__force pci_dev_flags_t) (1 << 11),
};
enum pci_irq_reroute_variant {
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