diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/eeh.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/eeh_event.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/eeh_driver.c | 229 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/eeh_event.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/eeh_pe.c | 28 |
5 files changed, 125 insertions, 137 deletions
diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h index 629fb27..d25a693 100644 --- a/arch/powerpc/include/asm/eeh.h +++ b/arch/powerpc/include/asm/eeh.h @@ -174,6 +174,7 @@ int eeh_rmv_from_parent_pe(struct eeh_dev *edev); void *eeh_pe_dev_traverse(struct eeh_pe *root, eeh_traverse_func fn, void *flag); void eeh_pe_restore_bars(struct eeh_pe *pe); +struct pci_bus *eeh_pe_bus_get(struct eeh_pe *pe); void * __devinit eeh_dev_init(struct device_node *dn, void *data); void __devinit eeh_dev_phb_init_dynamic(struct pci_controller *phb); diff --git a/arch/powerpc/include/asm/eeh_event.h b/arch/powerpc/include/asm/eeh_event.h index dc722b5..de67d83 100644 --- a/arch/powerpc/include/asm/eeh_event.h +++ b/arch/powerpc/include/asm/eeh_event.h @@ -32,7 +32,7 @@ struct eeh_event { }; int eeh_send_failure_event(struct eeh_pe *pe); -struct eeh_dev *handle_eeh_events(struct eeh_event *); +void eeh_handle_event(struct eeh_pe *pe); #endif /* __KERNEL__ */ #endif /* ASM_POWERPC_EEH_EVENT_H */ diff --git a/arch/powerpc/platforms/pseries/eeh_driver.c b/arch/powerpc/platforms/pseries/eeh_driver.c index baf92cd..343c807 100644 --- a/arch/powerpc/platforms/pseries/eeh_driver.c +++ b/arch/powerpc/platforms/pseries/eeh_driver.c @@ -116,28 +116,35 @@ static void eeh_enable_irq(struct pci_dev *dev) /** * eeh_report_error - Report pci error to each device driver - * @dev: PCI device + * @data: eeh device * @userdata: return value * * Report an EEH error to each device driver, collect up and * merge the device driver responses. Cumulative response * passed back in "userdata". */ -static int eeh_report_error(struct pci_dev *dev, void *userdata) +static void *eeh_report_error(void *data, void *userdata) { + struct eeh_dev *edev = (struct eeh_dev *)data; + struct pci_dev *dev = eeh_dev_to_pci_dev(edev); enum pci_ers_result rc, *res = userdata; struct pci_driver *driver = dev->driver; + /* We might not have the associated PCI device, + * then we should continue for next one. + */ + if (!dev) return NULL; + dev->error_state = pci_channel_io_frozen; if (!driver) - return 0; + return NULL; eeh_disable_irq(dev); if (!driver->err_handler || !driver->err_handler->error_detected) - return 0; + return NULL; rc = driver->err_handler->error_detected(dev, pci_channel_io_frozen); @@ -145,27 +152,31 @@ static int eeh_report_error(struct pci_dev *dev, void *userdata) if (rc == PCI_ERS_RESULT_NEED_RESET) *res = rc; if (*res == PCI_ERS_RESULT_NONE) *res = rc; - return 0; + return NULL; } /** * eeh_report_mmio_enabled - Tell drivers that MMIO has been enabled - * @dev: PCI device + * @data: eeh device * @userdata: return value * * Tells each device driver that IO ports, MMIO and config space I/O * are now enabled. Collects up and merges the device driver responses. * Cumulative response passed back in "userdata". */ -static int eeh_report_mmio_enabled(struct pci_dev *dev, void *userdata) +static void *eeh_report_mmio_enabled(void *data, void *userdata) { + struct eeh_dev *edev = (struct eeh_dev *)data; + struct pci_dev *dev = eeh_dev_to_pci_dev(edev); enum pci_ers_result rc, *res = userdata; - struct pci_driver *driver = dev->driver; + struct pci_driver *driver; - if (!driver || + if (!dev) return NULL; + + if (!(driver = dev->driver) || !driver->err_handler || !driver->err_handler->mmio_enabled) - return 0; + return NULL; rc = driver->err_handler->mmio_enabled(dev); @@ -173,12 +184,12 @@ static int eeh_report_mmio_enabled(struct pci_dev *dev, void *userdata) if (rc == PCI_ERS_RESULT_NEED_RESET) *res = rc; if (*res == PCI_ERS_RESULT_NONE) *res = rc; - return 0; + return NULL; } /** * eeh_report_reset - Tell device that slot has been reset - * @dev: PCI device + * @data: eeh device * @userdata: return value * * This routine must be called while EEH tries to reset particular @@ -186,13 +197,15 @@ static int eeh_report_mmio_enabled(struct pci_dev *dev, void *userdata) * some actions, usually to save data the driver needs so that the * driver can work again while the device is recovered. */ -static int eeh_report_reset(struct pci_dev *dev, void *userdata) +static void *eeh_report_reset(void *data, void *userdata) { + struct eeh_dev *edev = (struct eeh_dev *)data; + struct pci_dev *dev = eeh_dev_to_pci_dev(edev); enum pci_ers_result rc, *res = userdata; - struct pci_driver *driver = dev->driver; + struct pci_driver *driver; - if (!driver) - return 0; + if (!dev || !(driver = dev->driver)) + return NULL; dev->error_state = pci_channel_io_normal; @@ -200,7 +213,7 @@ static int eeh_report_reset(struct pci_dev *dev, void *userdata) if (!driver->err_handler || !driver->err_handler->slot_reset) - return 0; + return NULL; rc = driver->err_handler->slot_reset(dev); if ((*res == PCI_ERS_RESULT_NONE) || @@ -208,82 +221,89 @@ static int eeh_report_reset(struct pci_dev *dev, void *userdata) if (*res == PCI_ERS_RESULT_DISCONNECT && rc == PCI_ERS_RESULT_NEED_RESET) *res = rc; - return 0; + return NULL; } /** * eeh_report_resume - Tell device to resume normal operations - * @dev: PCI device + * @data: eeh device * @userdata: return value * * This routine must be called to notify the device driver that it * could resume so that the device driver can do some initialization * to make the recovered device work again. */ -static int eeh_report_resume(struct pci_dev *dev, void *userdata) +static void *eeh_report_resume(void *data, void *userdata) { - struct pci_driver *driver = dev->driver; + struct eeh_dev *edev = (struct eeh_dev *)data; + struct pci_dev *dev = eeh_dev_to_pci_dev(edev); + struct pci_driver *driver; + + if (!dev) return NULL; dev->error_state = pci_channel_io_normal; - if (!driver) - return 0; + if (!(driver = dev->driver)) + return NULL; eeh_enable_irq(dev); if (!driver->err_handler || !driver->err_handler->resume) - return 0; + return NULL; driver->err_handler->resume(dev); - return 0; + return NULL; } /** * eeh_report_failure - Tell device driver that device is dead. - * @dev: PCI device + * @data: eeh device * @userdata: return value * * This informs the device driver that the device is permanently * dead, and that no further recovery attempts will be made on it. */ -static int eeh_report_failure(struct pci_dev *dev, void *userdata) +static void *eeh_report_failure(void *data, void *userdata) { - struct pci_driver *driver = dev->driver; + struct eeh_dev *edev = (struct eeh_dev *)data; + struct pci_dev *dev = eeh_dev_to_pci_dev(edev); + struct pci_driver *driver; + + if (!dev) return NULL; dev->error_state = pci_channel_io_perm_failure; - if (!driver) - return 0; + if (!(driver = dev->driver)) + return NULL; eeh_disable_irq(dev); if (!driver->err_handler || !driver->err_handler->error_detected) - return 0; + return NULL; driver->err_handler->error_detected(dev, pci_channel_io_perm_failure); - return 0; + return NULL; } /** * eeh_reset_device - Perform actual reset of a pci slot - * @edev: PE associated EEH device + * @pe: EEH PE * @bus: PCI bus corresponding to the isolcated slot * * This routine must be called to do reset on the indicated PE. * During the reset, udev might be invoked because those affected * PCI devices will be removed and then added. */ -static int eeh_reset_device(struct eeh_dev *edev, struct pci_bus *bus) +static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus) { - struct device_node *dn; int cnt, rc; /* pcibios will clear the counter; save the value */ - cnt = edev->freeze_count; + cnt = pe->freeze_count; if (bus) pcibios_remove_pci_devices(bus); @@ -292,25 +312,13 @@ static int eeh_reset_device(struct eeh_dev *edev, struct pci_bus *bus) * Reconfigure bridges and devices. Don't try to bring the system * up if the reset failed for some reason. */ - rc = eeh_reset_pe(edev); + rc = eeh_reset_pe(pe); if (rc) return rc; - /* Walk over all functions on this device. */ - dn = eeh_dev_to_of_node(edev); - if (!pcibios_find_pci_bus(dn) && of_node_to_eeh_dev(dn->parent)) - dn = dn->parent->child; - - while (dn) { - struct eeh_dev *pedev = of_node_to_eeh_dev(dn); - - /* On Power4, always true because eeh_pe_config_addr=0 */ - if (edev->pe_config_addr == pedev->pe_config_addr) { - eeh_ops->configure_bridge(dn); - eeh_restore_bars(pedev); - } - dn = dn->sibling; - } + /* Restore PE */ + eeh_ops->configure_bridge(pe); + eeh_pe_restore_bars(pe); /* Give the system 5 seconds to finish running the user-space * hotplug shutdown scripts, e.g. ifdown for ethernet. Yes, @@ -322,7 +330,7 @@ static int eeh_reset_device(struct eeh_dev *edev, struct pci_bus *bus) ssleep(5); pcibios_add_pci_devices(bus); } - edev->freeze_count = cnt; + pe->freeze_count = cnt; return 0; } @@ -334,7 +342,7 @@ static int eeh_reset_device(struct eeh_dev *edev, struct pci_bus *bus) /** * eeh_handle_event - Reset a PCI device after hard lockup. - * @event: EEH event + * @pe: EEH PE * * While PHB detects address or data parity errors on particular PCI * slot, the associated PE will be frozen. Besides, DMA's occurring @@ -349,69 +357,24 @@ static int eeh_reset_device(struct eeh_dev *edev, struct pci_bus *bus) * drivers (which cause a second set of hotplug events to go out to * userspace). */ -struct eeh_dev *handle_eeh_events(struct eeh_event *event) +void eeh_handle_event(struct eeh_pe *pe) { - struct device_node *frozen_dn; - struct eeh_dev *frozen_edev; struct pci_bus *frozen_bus; int rc = 0; enum pci_ers_result result = PCI_ERS_RESULT_NONE; - const char *location, *pci_str, *drv_str, *bus_pci_str, *bus_drv_str; - - frozen_dn = eeh_find_device_pe(eeh_dev_to_of_node(event->edev)); - if (!frozen_dn) { - location = of_get_property(eeh_dev_to_of_node(event->edev), "ibm,loc-code", NULL); - location = location ? location : "unknown"; - printk(KERN_ERR "EEH: Error: Cannot find partition endpoint " - "for location=%s pci addr=%s\n", - location, eeh_pci_name(eeh_dev_to_pci_dev(event->edev))); - return NULL; - } - - frozen_bus = pcibios_find_pci_bus(frozen_dn); - location = of_get_property(frozen_dn, "ibm,loc-code", NULL); - location = location ? location : "unknown"; - - /* There are two different styles for coming up with the PE. - * In the old style, it was the highest EEH-capable device - * which was always an EADS pci bridge. In the new style, - * there might not be any EADS bridges, and even when there are, - * the firmware marks them as "EEH incapable". So another - * two-step is needed to find the pci bus.. - */ - if (!frozen_bus) - frozen_bus = pcibios_find_pci_bus(frozen_dn->parent); + frozen_bus = eeh_pe_bus_get(pe); if (!frozen_bus) { - printk(KERN_ERR "EEH: Cannot find PCI bus " - "for location=%s dn=%s\n", - location, frozen_dn->full_name); - return NULL; + pr_err("%s: Cannot find PCI bus for PHB#%d-PE#%x\n", + __func__, pe->phb->global_number, pe->addr); + return; } - frozen_edev = of_node_to_eeh_dev(frozen_dn); - frozen_edev->freeze_count++; - pci_str = eeh_pci_name(eeh_dev_to_pci_dev(event->edev)); - drv_str = eeh_pcid_name(eeh_dev_to_pci_dev(event->edev)); - - if (frozen_edev->freeze_count > EEH_MAX_ALLOWED_FREEZES) + pe->freeze_count++; + if (pe->freeze_count > EEH_MAX_ALLOWED_FREEZES) goto excess_failures; - - printk(KERN_WARNING - "EEH: This PCI device has failed %d times in the last hour:\n", - frozen_edev->freeze_count); - - if (frozen_edev->pdev) { - bus_pci_str = pci_name(frozen_edev->pdev); - bus_drv_str = eeh_pcid_name(frozen_edev->pdev); - printk(KERN_WARNING - "EEH: Bus location=%s driver=%s pci addr=%s\n", - location, bus_drv_str, bus_pci_str); - } - - printk(KERN_WARNING - "EEH: Device location=%s driver=%s pci addr=%s\n", - location, drv_str, pci_str); + pr_warning("EEH: This PCI device has failed %d times in the last hour\n", + pe->freeze_count); /* Walk the various device drivers attached to this slot through * a reset sequence, giving each an opportunity to do what it needs @@ -419,12 +382,12 @@ struct eeh_dev *handle_eeh_events(struct eeh_event *event) * status ... if any child can't handle the reset, then the entire * slot is dlpar removed and added. */ - pci_walk_bus(frozen_bus, eeh_report_error, &result); + eeh_pe_dev_traverse(pe, eeh_report_error, &result); /* Get the current PCI slot state. This can take a long time, * sometimes over 3 seconds for certain systems. */ - rc = eeh_ops->wait_state(eeh_dev_to_of_node(frozen_edev), MAX_WAIT_FOR_RECOVERY*1000); + rc = eeh_ops->wait_state(pe, MAX_WAIT_FOR_RECOVERY*1000); if (rc < 0 || rc == EEH_STATE_NOT_SUPPORT) { printk(KERN_WARNING "EEH: Permanent failure\n"); goto hard_fail; @@ -434,14 +397,14 @@ struct eeh_dev *handle_eeh_events(struct eeh_event *event) * don't post the error log until after all dev drivers * have been informed. */ - eeh_slot_error_detail(frozen_edev, EEH_LOG_TEMP); + eeh_slot_error_detail(pe, EEH_LOG_TEMP); /* If all device drivers were EEH-unaware, then shut * down all of the device drivers, and hope they * go down willingly, without panicing the system. */ if (result == PCI_ERS_RESULT_NONE) { - rc = eeh_reset_device(frozen_edev, frozen_bus); + rc = eeh_reset_device(pe, frozen_bus); if (rc) { printk(KERN_WARNING "EEH: Unable to reset, rc=%d\n", rc); goto hard_fail; @@ -450,7 +413,7 @@ struct eeh_dev *handle_eeh_events(struct eeh_event *event) /* If all devices reported they can proceed, then re-enable MMIO */ if (result == PCI_ERS_RESULT_CAN_RECOVER) { - rc = eeh_pci_enable(frozen_edev, EEH_OPT_THAW_MMIO); + rc = eeh_pci_enable(pe, EEH_OPT_THAW_MMIO); if (rc < 0) goto hard_fail; @@ -458,13 +421,13 @@ struct eeh_dev *handle_eeh_events(struct eeh_event *event) result = PCI_ERS_RESULT_NEED_RESET; } else { result = PCI_ERS_RESULT_NONE; - pci_walk_bus(frozen_bus, eeh_report_mmio_enabled, &result); + eeh_pe_dev_traverse(pe, eeh_report_mmio_enabled, &result); } } /* If all devices reported they can proceed, then re-enable DMA */ if (result == PCI_ERS_RESULT_CAN_RECOVER) { - rc = eeh_pci_enable(frozen_edev, EEH_OPT_THAW_DMA); + rc = eeh_pci_enable(pe, EEH_OPT_THAW_DMA); if (rc < 0) goto hard_fail; @@ -482,13 +445,13 @@ struct eeh_dev *handle_eeh_events(struct eeh_event *event) /* If any device called out for a reset, then reset the slot */ if (result == PCI_ERS_RESULT_NEED_RESET) { - rc = eeh_reset_device(frozen_edev, NULL); + rc = eeh_reset_device(pe, NULL); if (rc) { printk(KERN_WARNING "EEH: Cannot reset, rc=%d\n", rc); goto hard_fail; } result = PCI_ERS_RESULT_NONE; - pci_walk_bus(frozen_bus, eeh_report_reset, &result); + eeh_pe_dev_traverse(pe, eeh_report_reset, &result); } /* All devices should claim they have recovered by now. */ @@ -499,9 +462,9 @@ struct eeh_dev *handle_eeh_events(struct eeh_event *event) } /* Tell all device drivers that they can resume operations */ - pci_walk_bus(frozen_bus, eeh_report_resume, NULL); + eeh_pe_dev_traverse(pe, eeh_report_resume, NULL); - return frozen_edev; + return; excess_failures: /* @@ -509,30 +472,26 @@ excess_failures: * are due to poorly seated PCI cards. Only 10% or so are * due to actual, failed cards. */ - printk(KERN_ERR - "EEH: PCI device at location=%s driver=%s pci addr=%s\n" - "has failed %d times in the last hour " - "and has been permanently disabled.\n" - "Please try reseating this device or replacing it.\n", - location, drv_str, pci_str, frozen_edev->freeze_count); + pr_err("EEH: PHB#%d-PE#%x has failed %d times in the\n" + "last hour and has been permanently disabled.\n" + "Please try reseating or replacing it.\n", + pe->phb->global_number, pe->addr, + pe->freeze_count); goto perm_error; hard_fail: - printk(KERN_ERR - "EEH: Unable to recover from failure of PCI device " - "at location=%s driver=%s pci addr=%s\n" - "Please try reseating this device or replacing it.\n", - location, drv_str, pci_str); + pr_err("EEH: Unable to recover from failure from PHB#%d-PE#%x.\n" + "Please try reseating or replacing it\n", + pe->phb->global_number, pe->addr); perm_error: - eeh_slot_error_detail(frozen_edev, EEH_LOG_PERM); + eeh_slot_error_detail(pe, EEH_LOG_PERM); /* Notify all devices that they're about to go down. */ - pci_walk_bus(frozen_bus, eeh_report_failure, NULL); + eeh_pe_dev_traverse(pe, eeh_report_failure, NULL); /* Shut down the device drivers for good. */ - pcibios_remove_pci_devices(frozen_bus); - - return NULL; + if (frozen_bus) + pcibios_remove_pci_devices(frozen_bus); } diff --git a/arch/powerpc/platforms/pseries/eeh_event.c b/arch/powerpc/platforms/pseries/eeh_event.c index ba7005a..51faaac 100644 --- a/arch/powerpc/platforms/pseries/eeh_event.c +++ b/arch/powerpc/platforms/pseries/eeh_event.c @@ -82,7 +82,7 @@ static int eeh_event_handler(void * dummy) pe->phb->global_number, pe->addr); set_current_state(TASK_INTERRUPTIBLE); /* Don't add to load average */ - handle_eeh_events(event); + eeh_handle_event(pe); eeh_pe_state_clear(pe, EEH_PE_RECOVERING); kfree(event); diff --git a/arch/powerpc/platforms/pseries/eeh_pe.c b/arch/powerpc/platforms/pseries/eeh_pe.c index 2b7e85b..904123c 100644 --- a/arch/powerpc/platforms/pseries/eeh_pe.c +++ b/arch/powerpc/platforms/pseries/eeh_pe.c @@ -561,3 +561,31 @@ void eeh_pe_restore_bars(struct eeh_pe *pe) { eeh_pe_dev_traverse(pe, eeh_restore_one_device_bars, NULL); } + +/** + * eeh_pe_bus_get - Retrieve PCI bus according to the given PE + * @pe: EEH PE + * + * Retrieve the PCI bus according to the given PE. Basically, + * there're 3 types of PEs: PHB/Bus/Device. For PHB PE, the + * primary PCI bus will be retrieved. The parent bus will be + * returned for BUS PE. However, we don't have associated PCI + * bus for DEVICE PE. + */ +struct pci_bus *eeh_pe_bus_get(struct eeh_pe *pe) +{ + struct pci_bus *bus = NULL; + struct eeh_dev *edev; + struct pci_dev *pdev; + + if (pe->type == EEH_PE_PHB) { + bus = pe->phb->bus; + } else if (pe->type == EEH_PE_BUS) { + edev = list_first_entry(&pe->edevs, struct eeh_dev, list); + pdev = eeh_dev_to_pci_dev(edev); + if (pdev) + bus = pdev->bus; + } + + return bus; +} |
