diff options
| -rw-r--r-- | drivers/pci/hotplug/pciehp.h | 2 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pciehp_core.c | 2 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pciehp_hpc.c | 26 | ||||
| -rw-r--r-- | drivers/pci/pci-driver.c | 2 | ||||
| -rw-r--r-- | drivers/pci/pci.c | 2 | ||||
| -rw-r--r-- | drivers/pci/pcie/Makefile | 4 | ||||
| -rw-r--r-- | drivers/pci/pcie/portdrv.h | 6 | ||||
| -rw-r--r-- | drivers/pci/pcie/portdrv_core.c | 20 | ||||
| -rw-r--r-- | drivers/pci/pcie/portdrv_pci.c | 27 |
9 files changed, 50 insertions, 41 deletions
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h index 69fd401691be..918dccbc74b6 100644 --- a/drivers/pci/hotplug/pciehp.h +++ b/drivers/pci/hotplug/pciehp.h @@ -189,6 +189,8 @@ int pciehp_get_attention_status(struct hotplug_slot *hotplug_slot, u8 *status); int pciehp_set_raw_indicator_status(struct hotplug_slot *h_slot, u8 status); int pciehp_get_raw_indicator_status(struct hotplug_slot *h_slot, u8 *status); +int pciehp_slot_reset(struct pcie_device *dev); + static inline const char *slot_name(struct controller *ctrl) { return hotplug_slot_name(&ctrl->hotplug_slot); diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c index ad3393930ecb..f34114d45259 100644 --- a/drivers/pci/hotplug/pciehp_core.c +++ b/drivers/pci/hotplug/pciehp_core.c @@ -351,6 +351,8 @@ static struct pcie_port_service_driver hpdriver_portdrv = { .runtime_suspend = pciehp_runtime_suspend, .runtime_resume = pciehp_runtime_resume, #endif /* PM */ + + .slot_reset = pciehp_slot_reset, }; int __init pcie_hp_init(void) diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index 3024d7e85e6a..83a0fa119cae 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -862,6 +862,32 @@ void pcie_disable_interrupt(struct controller *ctrl) pcie_write_cmd(ctrl, 0, mask); } +/** + * pciehp_slot_reset() - ignore link event caused by error-induced hot reset + * @dev: PCI Express port service device + * + * Called from pcie_portdrv_slot_reset() after AER or DPC initiated a reset + * further up in the hierarchy to recover from an error. The reset was + * propagated down to this hotplug port. Ignore the resulting link flap. + * If the link failed to retrain successfully, synthesize the ignored event. + * Surprise removal during reset is detected through Presence Detect Changed. + */ +int pciehp_slot_reset(struct pcie_device *dev) +{ + struct controller *ctrl = get_service_data(dev); + + if (ctrl->state != ON_STATE) + return 0; + + pcie_capability_write_word(dev->port, PCI_EXP_SLTSTA, + PCI_EXP_SLTSTA_DLLSC); + + if (!pciehp_check_link_active(ctrl)) + pciehp_request(ctrl, PCI_EXP_SLTSTA_DLLSC); + + return 0; +} + /* * pciehp has a 1:1 bus:slot relationship so we ultimately want a secondary * bus reset of the bridge, but at the same time we want to ensure that it is diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 3da121cb8cbf..7fddd1eb480c 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -1537,7 +1537,7 @@ static int pci_uevent(struct device *dev, struct kobj_uevent_env *env) return 0; } -#if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH) +#if defined(CONFIG_PCIEAER) || defined(CONFIG_EEH) /** * pci_uevent_ers - emit a uevent during recovery path of PCI device * @pdev: PCI device undergoing error recovery diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index f9ac23fe6082..96fb803831c4 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2243,6 +2243,7 @@ int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state) } EXPORT_SYMBOL_GPL(pci_set_pcie_reset_state); +#ifdef CONFIG_PCIEAER void pcie_clear_device_status(struct pci_dev *dev) { u16 sta; @@ -2250,6 +2251,7 @@ void pcie_clear_device_status(struct pci_dev *dev) pcie_capability_read_word(dev, PCI_EXP_DEVSTA, &sta); pcie_capability_write_word(dev, PCI_EXP_DEVSTA, sta); } +#endif /** * pcie_clear_root_pme_status - Clear root port PME interrupt status. diff --git a/drivers/pci/pcie/Makefile b/drivers/pci/pcie/Makefile index b2980db88cc0..5783a2f79e6a 100644 --- a/drivers/pci/pcie/Makefile +++ b/drivers/pci/pcie/Makefile @@ -2,12 +2,12 @@ # # Makefile for PCI Express features and port driver -pcieportdrv-y := portdrv_core.o portdrv_pci.o err.o rcec.o +pcieportdrv-y := portdrv_core.o portdrv_pci.o rcec.o obj-$(CONFIG_PCIEPORTBUS) += pcieportdrv.o obj-$(CONFIG_PCIEASPM) += aspm.o -obj-$(CONFIG_PCIEAER) += aer.o +obj-$(CONFIG_PCIEAER) += aer.o err.o obj-$(CONFIG_PCIEAER_INJECT) += aer_inject.o obj-$(CONFIG_PCIE_PME) += pme.o obj-$(CONFIG_PCIE_DPC) += dpc.o diff --git a/drivers/pci/pcie/portdrv.h b/drivers/pci/pcie/portdrv.h index 2ff5724b8f13..0ef4bf5f811d 100644 --- a/drivers/pci/pcie/portdrv.h +++ b/drivers/pci/pcie/portdrv.h @@ -85,8 +85,7 @@ struct pcie_port_service_driver { int (*runtime_suspend)(struct pcie_device *dev); int (*runtime_resume)(struct pcie_device *dev); - /* Device driver may resume normal operations */ - void (*error_resume)(struct pci_dev *dev); + int (*slot_reset)(struct pcie_device *dev); int port_type; /* Type of the port this driver can handle */ u32 service; /* Port service this device represents */ @@ -110,6 +109,7 @@ void pcie_port_service_unregister(struct pcie_port_service_driver *new); extern struct bus_type pcie_port_bus_type; int pcie_port_device_register(struct pci_dev *dev); +int pcie_port_device_iter(struct device *dev, void *data); #ifdef CONFIG_PM int pcie_port_device_suspend(struct device *dev); int pcie_port_device_resume_noirq(struct device *dev); @@ -118,8 +118,6 @@ int pcie_port_device_runtime_suspend(struct device *dev); int pcie_port_device_runtime_resume(struct device *dev); #endif void pcie_port_device_remove(struct pci_dev *dev); -int __must_check pcie_port_bus_register(void); -void pcie_port_bus_unregister(void); struct pci_dev; diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 3ee63968deaa..604feeb84ee4 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -367,24 +367,24 @@ error_disable: return status; } -#ifdef CONFIG_PM -typedef int (*pcie_pm_callback_t)(struct pcie_device *); +typedef int (*pcie_callback_t)(struct pcie_device *); -static int pm_iter(struct device *dev, void *data) +int pcie_port_device_iter(struct device *dev, void *data) { struct pcie_port_service_driver *service_driver; size_t offset = *(size_t *)data; - pcie_pm_callback_t cb; + pcie_callback_t cb; if ((dev->bus == &pcie_port_bus_type) && dev->driver) { service_driver = to_service_driver(dev->driver); - cb = *(pcie_pm_callback_t *)((void *)service_driver + offset); + cb = *(pcie_callback_t *)((void *)service_driver + offset); if (cb) return cb(to_pcie_device(dev)); } return 0; } +#ifdef CONFIG_PM /** * pcie_port_device_suspend - suspend port services associated with a PCIe port * @dev: PCI Express port to handle @@ -392,13 +392,13 @@ static int pm_iter(struct device *dev, void *data) int pcie_port_device_suspend(struct device *dev) { size_t off = offsetof(struct pcie_port_service_driver, suspend); - return device_for_each_child(dev, &off, pm_iter); + return device_for_each_child(dev, &off, pcie_port_device_iter); } int pcie_port_device_resume_noirq(struct device *dev) { size_t off = offsetof(struct pcie_port_service_driver, resume_noirq); - return device_for_each_child(dev, &off, pm_iter); + return device_for_each_child(dev, &off, pcie_port_device_iter); } /** @@ -408,7 +408,7 @@ int pcie_port_device_resume_noirq(struct device *dev) int pcie_port_device_resume(struct device *dev) { size_t off = offsetof(struct pcie_port_service_driver, resume); - return device_for_each_child(dev, &off, pm_iter); + return device_for_each_child(dev, &off, pcie_port_device_iter); } /** @@ -418,7 +418,7 @@ int pcie_port_device_resume(struct device *dev) int pcie_port_device_runtime_suspend(struct device *dev) { size_t off = offsetof(struct pcie_port_service_driver, runtime_suspend); - return device_for_each_child(dev, &off, pm_iter); + return device_for_each_child(dev, &off, pcie_port_device_iter); } /** @@ -428,7 +428,7 @@ int pcie_port_device_runtime_suspend(struct device *dev) int pcie_port_device_runtime_resume(struct device *dev) { size_t off = offsetof(struct pcie_port_service_driver, runtime_resume); - return device_for_each_child(dev, &off, pm_iter); + return device_for_each_child(dev, &off, pcie_port_device_iter); } #endif /* PM */ diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c index c7ff1eea225a..35eca6277a96 100644 --- a/drivers/pci/pcie/portdrv_pci.c +++ b/drivers/pci/pcie/portdrv_pci.c @@ -160,6 +160,9 @@ static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev, static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev) { + size_t off = offsetof(struct pcie_port_service_driver, slot_reset); + device_for_each_child(&dev->dev, &off, pcie_port_device_iter); + pci_restore_state(dev); pci_save_state(dev); return PCI_ERS_RESULT_RECOVERED; @@ -170,29 +173,6 @@ static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev) return PCI_ERS_RESULT_RECOVERED; } -static int resume_iter(struct device *device, void *data) -{ - struct pcie_device *pcie_device; - struct pcie_port_service_driver *driver; - - if (device->bus == &pcie_port_bus_type && device->driver) { - driver = to_service_driver(device->driver); - if (driver && driver->error_resume) { - pcie_device = to_pcie_device(device); - - /* Forward error message to service drivers */ - driver->error_resume(pcie_device->port); - } - } - - return 0; -} - -static void pcie_portdrv_err_resume(struct pci_dev *dev) -{ - device_for_each_child(&dev->dev, NULL, resume_iter); -} - /* * LINUX Device Driver Model */ @@ -210,7 +190,6 @@ static const struct pci_error_handlers pcie_portdrv_err_handler = { .error_detected = pcie_portdrv_error_detected, .slot_reset = pcie_portdrv_slot_reset, .mmio_enabled = pcie_portdrv_mmio_enabled, - .resume = pcie_portdrv_err_resume, }; static struct pci_driver pcie_portdriver = { |