diff options
| -rw-r--r-- | arch/powerpc/platforms/pseries/eeh_driver.c | 81 |
1 files changed, 64 insertions, 17 deletions
diff --git a/arch/powerpc/platforms/pseries/eeh_driver.c b/arch/powerpc/platforms/pseries/eeh_driver.c index 045cd7a3733..c2bc9904f1c 100644 --- a/arch/powerpc/platforms/pseries/eeh_driver.c +++ b/arch/powerpc/platforms/pseries/eeh_driver.c @@ -100,14 +100,38 @@ static void eeh_report_error(struct pci_dev *dev, void *userdata) PCI_DN(dn)->eeh_mode |= EEH_MODE_IRQ_DISABLED; disable_irq_nosync(dev->irq); } - if (!driver->err_handler) - return; - if (!driver->err_handler->error_detected) + if (!driver->err_handler || + !driver->err_handler->error_detected) return; rc = driver->err_handler->error_detected (dev, pci_channel_io_frozen); if (*res == PCI_ERS_RESULT_NONE) *res = rc; - if (*res == PCI_ERS_RESULT_NEED_RESET) return; + if (*res == PCI_ERS_RESULT_DISCONNECT && + rc == PCI_ERS_RESULT_NEED_RESET) *res = rc; +} + +/** + * eeh_report_mmio_enabled - tell drivers that MMIO has been enabled + * + * Report an EEH error to each device driver, collect up and + * merge the device driver responses. Cumulative response + * passed back in "userdata". + */ + +static void eeh_report_mmio_enabled(struct pci_dev *dev, void *userdata) +{ + enum pci_ers_result rc, *res = userdata; + struct pci_driver *driver = dev->driver; + + // dev->error_state = pci_channel_mmio_enabled; + + if (!driver || + !driver->err_handler || + !driver->err_handler->mmio_enabled) + return; + + rc = driver->err_handler->mmio_enabled (dev); + if (*res == PCI_ERS_RESULT_NONE) *res = rc; if (*res == PCI_ERS_RESULT_DISCONNECT && rc == PCI_ERS_RESULT_NEED_RESET) *res = rc; } @@ -118,6 +142,7 @@ static void eeh_report_error(struct pci_dev *dev, void *userdata) static void eeh_report_reset(struct pci_dev *dev, void *userdata) { + enum pci_ers_result rc, *res = userdata; struct pci_driver *driver = dev->driver; struct device_node *dn = pci_device_to_OF_node(dev); @@ -128,12 +153,14 @@ static void eeh_report_reset(struct pci_dev *dev, void *userdata) PCI_DN(dn)->eeh_mode &= ~EEH_MODE_IRQ_DISABLED; enable_irq(dev->irq); } - if (!driver->err_handler) - return; - if (!driver->err_handler->slot_reset) + if (!driver->err_handler || + !driver->err_handler->slot_reset) return; - driver->err_handler->slot_reset(dev); + rc = driver->err_handler->slot_reset(dev); + if (*res == PCI_ERS_RESULT_NONE) *res = rc; + if (*res == PCI_ERS_RESULT_DISCONNECT && + rc == PCI_ERS_RESULT_NEED_RESET) *res = rc; } /** @@ -362,23 +389,43 @@ struct pci_dn * handle_eeh_events (struct eeh_event *event) goto hard_fail; } - /* If any device called out for a reset, then reset the slot */ - if (result == PCI_ERS_RESULT_NEED_RESET) { - rc = eeh_reset_device(frozen_pdn, NULL); - if (rc) - goto hard_fail; - pci_walk_bus(frozen_bus, eeh_report_reset, NULL); + /* If all devices reported they can proceed, then re-enable MMIO */ + if (result == PCI_ERS_RESULT_CAN_RECOVER) { + rc = rtas_pci_enable(frozen_pdn, EEH_THAW_MMIO); + + if (rc) { + result = PCI_ERS_RESULT_NEED_RESET; + } else { + result = PCI_ERS_RESULT_NONE; + pci_walk_bus(frozen_bus, eeh_report_mmio_enabled, &result); + } } - /* If all devices reported they can proceed, the re-enable PIO */ + /* If all devices reported they can proceed, then re-enable DMA */ if (result == PCI_ERS_RESULT_CAN_RECOVER) { - /* XXX Not supported; we brute-force reset the device */ + rc = rtas_pci_enable(frozen_pdn, EEH_THAW_DMA); + + if (rc) + result = PCI_ERS_RESULT_NEED_RESET; + } + + /* If any device has a hard failure, then shut off everything. */ + if (result == PCI_ERS_RESULT_DISCONNECT) + goto hard_fail; + + /* If any device called out for a reset, then reset the slot */ + if (result == PCI_ERS_RESULT_NEED_RESET) { rc = eeh_reset_device(frozen_pdn, NULL); if (rc) goto hard_fail; - pci_walk_bus(frozen_bus, eeh_report_reset, NULL); + result = PCI_ERS_RESULT_NONE; + pci_walk_bus(frozen_bus, eeh_report_reset, &result); } + /* All devices should claim they have recovered by now. */ + if (result != PCI_ERS_RESULT_RECOVERED) + goto hard_fail; + /* Tell all device drivers that they can resume operations */ pci_walk_bus(frozen_bus, eeh_report_resume, NULL); |