diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/eeh.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/ppc-pci.h | 4 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/eeh.c | 102 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/eeh_pe.c | 79 |
4 files changed, 84 insertions, 104 deletions
diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h index 250ae2718bb8..f86a85f5f049 100644 --- a/arch/powerpc/include/asm/eeh.h +++ b/arch/powerpc/include/asm/eeh.h @@ -67,6 +67,9 @@ struct eeh_pe { struct list_head child; /* Child PEs */ }; +#define eeh_pe_for_each_dev(pe, edev) \ + list_for_each_entry(edev, &pe->edevs, list) + /* * The struct is used to trace EEH state for the associated * PCI device node or PCI device. In future, it might diff --git a/arch/powerpc/include/asm/ppc-pci.h b/arch/powerpc/include/asm/ppc-pci.h index 80fa704d410f..c7e5bd60bca1 100644 --- a/arch/powerpc/include/asm/ppc-pci.h +++ b/arch/powerpc/include/asm/ppc-pci.h @@ -57,8 +57,8 @@ int eeh_reset_pe(struct eeh_dev *); void eeh_restore_bars(struct eeh_dev *); int rtas_write_config(struct pci_dn *, int where, int size, u32 val); int rtas_read_config(struct pci_dn *, int where, int size, u32 *val); -void eeh_mark_slot(struct device_node *dn, int mode_flag); -void eeh_clear_slot(struct device_node *dn, int mode_flag); +void eeh_pe_state_mark(struct eeh_pe *pe, int state); +void eeh_pe_state_clear(struct eeh_pe *pe, int state); struct device_node *eeh_find_device_pe(struct device_node *dn); void eeh_sysfs_add_device(struct pci_dev *pdev); diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index b60863b184c3..9c623c23057f 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -279,108 +279,6 @@ struct device_node *eeh_find_device_pe(struct device_node *dn) } /** - * __eeh_mark_slot - Mark all child devices as failed - * @parent: parent device - * @mode_flag: failure flag - * - * Mark all devices that are children of this device as failed. - * Mark the device driver too, so that it can see the failure - * immediately; this is critical, since some drivers poll - * status registers in interrupts ... If a driver is polling, - * and the slot is frozen, then the driver can deadlock in - * an interrupt context, which is bad. - */ -static void __eeh_mark_slot(struct device_node *parent, int mode_flag) -{ - struct device_node *dn; - - for_each_child_of_node(parent, dn) { - if (of_node_to_eeh_dev(dn)) { - /* Mark the pci device driver too */ - struct pci_dev *dev = of_node_to_eeh_dev(dn)->pdev; - - of_node_to_eeh_dev(dn)->mode |= mode_flag; - - if (dev && dev->driver) - dev->error_state = pci_channel_io_frozen; - - __eeh_mark_slot(dn, mode_flag); - } - } -} - -/** - * eeh_mark_slot - Mark the indicated device and its children as failed - * @dn: parent device - * @mode_flag: failure flag - * - * Mark the indicated device and its child devices as failed. - * The device drivers are marked as failed as well. - */ -void eeh_mark_slot(struct device_node *dn, int mode_flag) -{ - struct pci_dev *dev; - dn = eeh_find_device_pe(dn); - - /* Back up one, since config addrs might be shared */ - if (!pcibios_find_pci_bus(dn) && of_node_to_eeh_dev(dn->parent)) - dn = dn->parent; - - of_node_to_eeh_dev(dn)->mode |= mode_flag; - - /* Mark the pci device too */ - dev = of_node_to_eeh_dev(dn)->pdev; - if (dev) - dev->error_state = pci_channel_io_frozen; - - __eeh_mark_slot(dn, mode_flag); -} - -/** - * __eeh_clear_slot - Clear failure flag for the child devices - * @parent: parent device - * @mode_flag: flag to be cleared - * - * Clear failure flag for the child devices. - */ -static void __eeh_clear_slot(struct device_node *parent, int mode_flag) -{ - struct device_node *dn; - - for_each_child_of_node(parent, dn) { - if (of_node_to_eeh_dev(dn)) { - of_node_to_eeh_dev(dn)->mode &= ~mode_flag; - of_node_to_eeh_dev(dn)->check_count = 0; - __eeh_clear_slot(dn, mode_flag); - } - } -} - -/** - * eeh_clear_slot - Clear failure flag for the indicated device and its children - * @dn: parent device - * @mode_flag: flag to be cleared - * - * Clear failure flag for the indicated device and its children. - */ -void eeh_clear_slot(struct device_node *dn, int mode_flag) -{ - unsigned long flags; - raw_spin_lock_irqsave(&confirm_error_lock, flags); - - dn = eeh_find_device_pe(dn); - - /* Back up one, since config addrs might be shared */ - if (!pcibios_find_pci_bus(dn) && of_node_to_eeh_dev(dn->parent)) - dn = dn->parent; - - of_node_to_eeh_dev(dn)->mode &= ~mode_flag; - of_node_to_eeh_dev(dn)->check_count = 0; - __eeh_clear_slot(dn, mode_flag); - raw_spin_unlock_irqrestore(&confirm_error_lock, flags); -} - -/** * eeh_dn_check_failure - Check if all 1's data is due to EEH slot freeze * @dn: device node * @dev: pci device, if known diff --git a/arch/powerpc/platforms/pseries/eeh_pe.c b/arch/powerpc/platforms/pseries/eeh_pe.c index e941e6315fa6..0dac1b69582d 100644 --- a/arch/powerpc/platforms/pseries/eeh_pe.c +++ b/arch/powerpc/platforms/pseries/eeh_pe.c @@ -388,3 +388,82 @@ int eeh_rmv_from_parent_pe(struct eeh_dev *edev) return 0; } + +/** + * __eeh_pe_state_mark - Mark the state for the PE + * @data: EEH PE + * @flag: state + * + * The function is used to mark the indicated state for the given + * PE. Also, the associated PCI devices will be put into IO frozen + * state as well. + */ +static void *__eeh_pe_state_mark(void *data, void *flag) +{ + struct eeh_pe *pe = (struct eeh_pe *)data; + int state = *((int *)flag); + struct eeh_dev *tmp; + struct pci_dev *pdev; + + /* + * Mark the PE with the indicated state. Also, + * the associated PCI device will be put into + * I/O frozen state to avoid I/O accesses from + * the PCI device driver. + */ + pe->state |= state; + eeh_pe_for_each_dev(pe, tmp) { + pdev = eeh_dev_to_pci_dev(tmp); + if (pdev) + pdev->error_state = pci_channel_io_frozen; + } + + return NULL; +} + +/** + * eeh_pe_state_mark - Mark specified state for PE and its associated device + * @pe: EEH PE + * + * EEH error affects the current PE and its child PEs. The function + * is used to mark appropriate state for the affected PEs and the + * associated devices. + */ +void eeh_pe_state_mark(struct eeh_pe *pe, int state) +{ + eeh_pe_traverse(pe, __eeh_pe_state_mark, &state); +} + +/** + * __eeh_pe_state_clear - Clear state for the PE + * @data: EEH PE + * @flag: state + * + * The function is used to clear the indicated state from the + * given PE. Besides, we also clear the check count of the PE + * as well. + */ +static void *__eeh_pe_state_clear(void *data, void *flag) +{ + struct eeh_pe *pe = (struct eeh_pe *)data; + int state = *((int *)flag); + + pe->state &= ~state; + pe->check_count = 0; + + return NULL; +} + +/** + * eeh_pe_state_clear - Clear state for the PE and its children + * @pe: PE + * @state: state to be cleared + * + * When the PE and its children has been recovered from error, + * we need clear the error state for that. The function is used + * for the purpose. + */ +void eeh_pe_state_clear(struct eeh_pe *pe, int state) +{ + eeh_pe_traverse(pe, __eeh_pe_state_clear, &state); +} |