From: Kevin Barnett Date: Wed, 3 May 2017 23:54:37 +0000 (-0500) Subject: scsi: smartpqi: add lockup action X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3c50976f33f30cf00baea9d518bd3e7ddd01ecc4;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git scsi: smartpqi: add lockup action add support for actions to take when controller goes offline. Reviewed-by: Scott Benesh Signed-off-by: Kevin Barnett Signed-off-by: Don Brace Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c index 23ebe22940fd..15bb8c1602b4 100644 --- a/drivers/scsi/smartpqi/smartpqi_init.c +++ b/drivers/scsi/smartpqi/smartpqi_init.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -60,6 +61,7 @@ MODULE_LICENSE("GPL"); static char *hpe_branded_controller = "HPE Smart Array Controller"; static char *microsemi_branded_controller = "Microsemi Smart Family Controller"; +static void pqi_perform_lockup_action(void); static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info); static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info); static void pqi_scan_start(struct Scsi_Host *shost); @@ -81,6 +83,32 @@ static struct scsi_transport_template *pqi_sas_transport_template; static atomic_t pqi_controller_count = ATOMIC_INIT(0); +enum pqi_lockup_action { + NONE, + REBOOT, + PANIC +}; + +static enum pqi_lockup_action pqi_lockup_action = NONE; + +static struct { + enum pqi_lockup_action action; + char *name; +} pqi_lockup_actions[] = { + { + .action = NONE, + .name = "none", + }, + { + .action = REBOOT, + .name = "reboot", + }, + { + .action = PANIC, + .name = "panic", + }, +}; + static unsigned int pqi_supported_event_types[] = { PQI_EVENT_TYPE_HOTPLUG, PQI_EVENT_TYPE_HARDWARE, @@ -96,6 +124,13 @@ module_param_named(disable_device_id_wildcards, MODULE_PARM_DESC(disable_device_id_wildcards, "Disable device ID wildcards."); +static char *pqi_lockup_action_param; +module_param_named(lockup_action, + pqi_lockup_action_param, charp, 0644); +MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n" + "\t\tSupported: none, reboot, panic\n" + "\t\tDefault: none"); + static char *raid_levels[] = { "RAID-0", "RAID-4", @@ -2729,6 +2764,8 @@ static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info) ctrl_info->controller_online = false; dev_err(&ctrl_info->pci_dev->dev, "controller offline\n"); sis_shutdown_ctrl(ctrl_info); + pci_disable_device(ctrl_info->pci_dev); + pqi_perform_lockup_action(); for (i = 0; i < ctrl_info->num_queue_groups; i++) { queue_group = &ctrl_info->queue_groups[i]; @@ -5381,12 +5418,55 @@ static ssize_t pqi_host_rescan_store(struct device *dev, return count; } +static ssize_t pqi_lockup_action_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + int count = 0; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) { + if (pqi_lockup_actions[i].action == pqi_lockup_action) + count += snprintf(buffer + count, PAGE_SIZE - count, + "[%s] ", pqi_lockup_actions[i].name); + else + count += snprintf(buffer + count, PAGE_SIZE - count, + "%s ", pqi_lockup_actions[i].name); + } + + count += snprintf(buffer + count, PAGE_SIZE - count, "\n"); + + return count; +} + +static ssize_t pqi_lockup_action_store(struct device *dev, + struct device_attribute *attr, const char *buffer, size_t count) +{ + unsigned int i; + char *action_name; + char action_name_buffer[32]; + + strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer)); + action_name = strstrip(action_name_buffer); + + for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) { + if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) { + pqi_lockup_action = pqi_lockup_actions[i].action; + return count; + } + } + + return -EINVAL; +} + static DEVICE_ATTR(version, 0444, pqi_version_show, NULL); static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store); +static DEVICE_ATTR(lockup_action, 0644, + pqi_lockup_action_show, pqi_lockup_action_store); static struct device_attribute *pqi_shost_attrs[] = { &dev_attr_version, &dev_attr_rescan, + &dev_attr_lockup_action, NULL }; @@ -6133,6 +6213,21 @@ static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info) pqi_free_ctrl_resources(ctrl_info); } +static void pqi_perform_lockup_action(void) +{ + switch (pqi_lockup_action) { + case PANIC: + panic("FATAL: Smart Family Controller lockup detected"); + break; + case REBOOT: + emergency_restart(); + break; + case NONE: + default: + break; + } +} + static void pqi_print_ctrl_info(struct pci_dev *pci_dev, const struct pci_device_id *id) { @@ -6238,6 +6333,30 @@ error: "unable to flush controller cache\n"); } +static void pqi_process_lockup_action_param(void) +{ + unsigned int i; + + if (!pqi_lockup_action_param) + return; + + for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) { + if (strcmp(pqi_lockup_action_param, + pqi_lockup_actions[i].name) == 0) { + pqi_lockup_action = pqi_lockup_actions[i].action; + return; + } + } + + pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n", + DRIVER_NAME_SHORT, pqi_lockup_action_param); +} + +static void pqi_process_module_params(void) +{ + pqi_process_lockup_action_param(); +} + #if defined(CONFIG_PM) static int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state) @@ -6545,6 +6664,8 @@ static int __init pqi_init(void) if (!pqi_sas_transport_template) return -ENODEV; + pqi_process_module_params(); + rc = pci_register_driver(&pqi_pci_driver); if (rc) sas_release_transport(pqi_sas_transport_template);