From: Kevin Barnett <kevin.barn...@microsemi.com>
improve support for taking controller offline.
Reviewed-by: Scott Benesh <scott.ben...@microsemi.com>
Signed-off-by: Kevin Barnett <kevin.barn...@microsemi.com>
Signed-off-by: Don Brace <don.br...@microsemi.com>
---
drivers/scsi/smartpqi/smartpqi.h | 2
drivers/scsi/smartpqi/smartpqi_init.c | 141 ++++++++++++++++++---------------
2 files changed, 77 insertions(+), 66 deletions(-)
diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h
index 94b92ae..2ed15cf 100644
--- a/drivers/scsi/smartpqi/smartpqi.h
+++ b/drivers/scsi/smartpqi/smartpqi.h
@@ -994,7 +994,6 @@ struct pqi_ctrl_info {
u8 inbound_spanning_supported : 1;
u8 outbound_spanning_supported : 1;
u8 pqi_mode_enabled : 1;
- u8 update_time_worker_scheduled : 1;
struct list_head scsi_device_list;
spinlock_t scsi_device_list_lock;
@@ -1016,6 +1015,7 @@ struct pqi_ctrl_info {
u32 previous_heartbeat_count;
__le32 __iomem *heartbeat_counter;
struct timer_list heartbeat_timer;
+ struct work_struct ctrl_offline_work;
struct semaphore sync_request_sem;
atomic_t num_busy_threads;
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c
b/drivers/scsi/smartpqi/smartpqi_init.c
index f36aace..338ba03 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -61,10 +61,8 @@ 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 void pqi_complete_all_queued_raid_bypass_retries(
- struct pqi_ctrl_info *ctrl_info, int result);
+static void pqi_ctrl_offline_worker(struct work_struct *work);
static void pqi_retry_raid_bypass_requests(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);
@@ -219,7 +217,6 @@ static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info
*ctrl_info,
sis_write_driver_scratch(ctrl_info, mode);
}
-#define PQI_RESCAN_WORK_INTERVAL (10 * HZ)
static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
{
ctrl_info->block_requests = true;
@@ -305,10 +302,26 @@ static inline bool pqi_device_in_reset(struct
pqi_scsi_dev *device)
return device->in_reset;
}
+static inline void pqi_schedule_rescan_worker_with_delay(
+ struct pqi_ctrl_info *ctrl_info, unsigned long delay)
+{
+ if (pqi_ctrl_offline(ctrl_info))
+ return;
+
+ schedule_delayed_work(&ctrl_info->rescan_work, delay);
+}
+
static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
{
- schedule_delayed_work(&ctrl_info->rescan_work,
- PQI_RESCAN_WORK_INTERVAL);
+ pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
+}
+
+#define PQI_RESCAN_WORK_DELAY (10 * HZ)
+
+static inline void pqi_schedule_rescan_worker_delayed(
+ struct pqi_ctrl_info *ctrl_info)
+{
+ pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
}
static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
@@ -741,6 +754,9 @@ static void pqi_update_time_worker(struct work_struct *work)
ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
update_time_work);
+ if (pqi_ctrl_offline(ctrl_info))
+ return;
+
rc = pqi_write_current_time_to_host_wellness(ctrl_info);
if (rc)
dev_warn(&ctrl_info->pci_dev->dev,
@@ -753,21 +769,13 @@ static void pqi_update_time_worker(struct work_struct
*work)
static inline void pqi_schedule_update_time_worker(
struct pqi_ctrl_info *ctrl_info)
{
- if (ctrl_info->update_time_worker_scheduled)
- return;
-
schedule_delayed_work(&ctrl_info->update_time_work, 0);
- ctrl_info->update_time_worker_scheduled = true;
}
static inline void pqi_cancel_update_time_worker(
struct pqi_ctrl_info *ctrl_info)
{
- if (!ctrl_info->update_time_worker_scheduled)
- return;
-
cancel_delayed_work_sync(&ctrl_info->update_time_work);
- ctrl_info->update_time_worker_scheduled = false;
}
static int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
@@ -1933,7 +1941,7 @@ static int pqi_scan_scsi_devices(struct pqi_ctrl_info
*ctrl_info)
rc = pqi_update_scsi_devices(ctrl_info);
if (rc)
- pqi_schedule_rescan_worker(ctrl_info);
+ pqi_schedule_rescan_worker_delayed(ctrl_info);
mutex_unlock(&ctrl_info->scan_mutex);
@@ -2756,6 +2764,10 @@ static void pqi_event_worker(struct work_struct *work)
pqi_ctrl_busy(ctrl_info);
pqi_wait_if_ctrl_blocked(ctrl_info, NO_TIMEOUT);
+ if (pqi_ctrl_offline(ctrl_info))
+ goto out;
+
+ pqi_schedule_rescan_worker_delayed(ctrl_info);
event = ctrl_info->events;
for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
@@ -2766,9 +2778,8 @@ static void pqi_event_worker(struct work_struct *work)
event++;
}
+out:
pqi_ctrl_unbusy(ctrl_info);
-
- pqi_schedule_rescan_worker(ctrl_info);
}
#define PQI_HEARTBEAT_TIMER_INTERVAL (10 * HZ)
@@ -4744,25 +4755,13 @@ static void pqi_raid_bypass_retry_worker(struct
work_struct *work)
pqi_retry_raid_bypass_requests(ctrl_info);
}
-static void pqi_complete_all_queued_raid_bypass_retries(
- struct pqi_ctrl_info *ctrl_info, int result)
+static void pqi_clear_all_queued_raid_bypass_retries(
+ struct pqi_ctrl_info *ctrl_info)
{
unsigned long flags;
- struct pqi_io_request *io_request;
- struct pqi_io_request *next;
- struct scsi_cmnd *scmd;
spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
-
- list_for_each_entry_safe(io_request, next,
- &ctrl_info->raid_bypass_retry_list, request_list_entry) {
- list_del(&io_request->request_list_entry);
- scmd = io_request->scmd;
- pqi_free_io_request(io_request);
- scmd->result = result;
- pqi_scsi_done(scmd);
- }
-
+ INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
}
@@ -6318,6 +6317,7 @@ static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int
numa_node)
INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
init_timer(&ctrl_info->heartbeat_timer);
+ INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
sema_init(&ctrl_info->sync_request_sem,
PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
@@ -6397,58 +6397,69 @@ static void pqi_perform_lockup_action(void)
}
}
-static void pqi_complete_all_queued_requests(struct pqi_ctrl_info *ctrl_info,
- int result)
+static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
+ .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
+ .status = SAM_STAT_CHECK_CONDITION,
+};
+
+static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
{
unsigned int i;
- unsigned int path;
- struct pqi_queue_group *queue_group;
- unsigned long flags;
struct pqi_io_request *io_request;
- struct pqi_io_request *next;
struct scsi_cmnd *scmd;
- for (i = 0; i < ctrl_info->num_queue_groups; i++) {
- queue_group = &ctrl_info->queue_groups[i];
-
- for (path = 0; path < 2; path++) {
- spin_lock_irqsave(
- &queue_group->submit_lock[path], flags);
-
- list_for_each_entry_safe(io_request, next,
- &queue_group->request_list[path],
- request_list_entry) {
-
- scmd = io_request->scmd;
- if (scmd) {
- scmd->result = result;
- pqi_scsi_done(scmd);
- }
-
- list_del(&io_request->request_list_entry);
- }
+ for (i = 0; i < ctrl_info->max_io_slots; i++) {
+ io_request = &ctrl_info->io_request_pool[i];
+ if (atomic_read(&io_request->refcount) == 0)
+ continue;
- spin_unlock_irqrestore(
- &queue_group->submit_lock[path], flags);
+ scmd = io_request->scmd;
+ if (scmd) {
+ set_host_byte(scmd, DID_NO_CONNECT);
+ } else {
+ io_request->status = -ENXIO;
+ io_request->error_info =
+ &pqi_ctrl_offline_raid_error_info;
}
+
+ io_request->io_complete_callback(io_request,
+ io_request->context);
}
}
-static void pqi_fail_all_queued_requests(struct pqi_ctrl_info *ctrl_info)
+static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
{
- pqi_complete_all_queued_requests(ctrl_info, DID_NO_CONNECT << 16);
- pqi_complete_all_queued_raid_bypass_retries(ctrl_info,
- DID_NO_CONNECT << 16);
+ pqi_perform_lockup_action();
+ pqi_stop_heartbeat_timer(ctrl_info);
+ pqi_free_interrupts(ctrl_info);
+ pqi_cancel_rescan_worker(ctrl_info);
+ pqi_cancel_update_time_worker(ctrl_info);
+ pqi_ctrl_wait_until_quiesced(ctrl_info);
+ pqi_fail_all_outstanding_requests(ctrl_info);
+ pqi_clear_all_queued_raid_bypass_retries(ctrl_info);
+ pqi_ctrl_unblock_requests(ctrl_info);
+}
+
+static void pqi_ctrl_offline_worker(struct work_struct *work)
+{
+ struct pqi_ctrl_info *ctrl_info;
+
+ ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
+ pqi_take_ctrl_offline_deferred(ctrl_info);
}
static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
{
+ if (!ctrl_info->controller_online)
+ return;
+
ctrl_info->controller_online = false;
+ ctrl_info->pqi_mode_enabled = false;
+ pqi_ctrl_block_requests(ctrl_info);
sis_shutdown_ctrl(ctrl_info);
pci_disable_device(ctrl_info->pci_dev);
dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
- pqi_perform_lockup_action();
- pqi_fail_all_queued_requests(ctrl_info);
+ schedule_work(&ctrl_info->ctrl_offline_work);
}
static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
