From: Kevin Barnett <kevin.barnett@xxxxxxxxxxxxx>
LUN resets can take longer to complete. Adding in more
driver logging helps show where the driver is in the
reset process.
* Add additional logging to help in debugging issues
with LUN resets.
* Add in a timeout in pqi_device_wait_for_pending_io to
cap how long the driver will wait for outstanding commands.
Reviewed-by: Mahesh Rajashekhara <mahesh.rajashekhara@xxxxxxxxxxxxx>
Reviewed-by: Scott Benesh <scott.benesh@xxxxxxxxxxxxx>
Reviewed-by: Mike McGowen <mike.mcgowen@xxxxxxxxxxxxx>
Reviewed-by: Scott Teel <scott.teel@xxxxxxxxxxxxx>
Signed-off-by: Kevin Barnett <kevin.barnett@xxxxxxxxxxxxx>
Signed-off-by: Don Brace <don.brace@xxxxxxxxxxxxx>
---
drivers/scsi/smartpqi/smartpqi_init.c | 125 +++++++++++++++++++++++----------
1 file changed, 89 insertions(+), 36 deletions(-)
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index 0e433223aea4..91616ddafd17 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -84,7 +84,7 @@ static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info);
static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info);
static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info);
static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
- struct pqi_scsi_dev *device, unsigned long timeout_secs);
+ struct pqi_scsi_dev *device, unsigned long timeout_msecs);
/* for flags argument to pqi_submit_raid_request_synchronous() */
#define PQI_SYNC_FLAGS_INTERRUPTABLE 0x1
@@ -335,11 +335,34 @@ static void pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
atomic_dec(&ctrl_info->num_blocked_threads);
}
+#define PQI_QUIESCE_WARNING_TIMEOUT_SECS 10
+
static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
{
+ unsigned long start_jiffies;
+ unsigned long warning_timeout;
+ bool displayed_warning;
+
+ displayed_warning = false;
+ start_jiffies = jiffies;
+ warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * PQI_HZ) + start_jiffies;
+
while (atomic_read(&ctrl_info->num_busy_threads) >
- atomic_read(&ctrl_info->num_blocked_threads))
+ atomic_read(&ctrl_info->num_blocked_threads)) {
+ if (time_after(jiffies, warning_timeout)) {
+ dev_warn(&ctrl_info->pci_dev->dev,
+ "waiting %u seconds for driver activity to quiesce\n",
+ jiffies_to_msecs(jiffies - start_jiffies) / 1000);
+ displayed_warning = true;
+ warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * PQI_HZ) + jiffies;
+ }
usleep_range(1000, 2000);
+ }
+
+ if (displayed_warning)
+ dev_warn(&ctrl_info->pci_dev->dev,
+ "driver activity quiesced after waiting for %u seconds\n",
+ jiffies_to_msecs(jiffies - start_jiffies) / 1000);
}
static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
@@ -1669,7 +1692,7 @@ static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
return rc;
}
-#define PQI_PENDING_IO_TIMEOUT_SECS 20
+#define PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS (20 * 1000)
static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
{
@@ -1677,7 +1700,8 @@ static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info, struct pqi
pqi_device_remove_start(device);
- rc = pqi_device_wait_for_pending_io(ctrl_info, device, PQI_PENDING_IO_TIMEOUT_SECS);
+ rc = pqi_device_wait_for_pending_io(ctrl_info, device,
+ PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS);
if (rc)
dev_err(&ctrl_info->pci_dev->dev,
"scsi %d:%d:%d:%d removing device with %d outstanding command(s)\n",
@@ -3086,7 +3110,7 @@ static void pqi_process_io_error(unsigned int iu_type,
}
}
-static int pqi_interpret_task_management_response(
+static int pqi_interpret_task_management_response(struct pqi_ctrl_info *ctrl_info,
struct pqi_task_management_response *response)
{
int rc;
@@ -3104,6 +3128,10 @@ static int pqi_interpret_task_management_response(
break;
}
+ if (rc)
+ dev_err(&ctrl_info->pci_dev->dev,
+ "Task Management Function error: %d (response code: %u)\n", rc, response->response_code);
+
return rc;
}
@@ -3172,9 +3200,8 @@ static int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info, struct pqi_queue
&((struct pqi_vendor_general_response *)response)->status);
break;
case PQI_RESPONSE_IU_TASK_MANAGEMENT:
- io_request->status =
- pqi_interpret_task_management_response(
- (void *)response);
+ io_request->status = pqi_interpret_task_management_response(ctrl_info,
+ (void *)response);
break;
case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
pqi_aio_path_disabled(io_request);
@@ -5836,24 +5863,37 @@ static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
}
}
+#define PQI_PENDING_IO_WARNING_TIMEOUT_SECS 10
+
static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
- struct pqi_scsi_dev *device, unsigned long timeout_secs)
+ struct pqi_scsi_dev *device, unsigned long timeout_msecs)
{
- unsigned long timeout;
+ int cmds_outstanding;
+ unsigned long start_jiffies;
+ unsigned long warning_timeout;
+ unsigned long msecs_waiting;
+ start_jiffies = jiffies;
+ warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * PQI_HZ) + start_jiffies;
- timeout = (timeout_secs * PQI_HZ) + jiffies;
-
- while (atomic_read(&device->scsi_cmds_outstanding)) {
+ while ((cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding)) > 0) {
pqi_check_ctrl_health(ctrl_info);
if (pqi_ctrl_offline(ctrl_info))
return -ENXIO;
- if (timeout_secs != NO_TIMEOUT) {
- if (time_after(jiffies, timeout)) {
- dev_err(&ctrl_info->pci_dev->dev,
- "timed out waiting for pending I/O\n");
- return -ETIMEDOUT;
- }
+ msecs_waiting = jiffies_to_msecs(jiffies - start_jiffies);
+ if (msecs_waiting > timeout_msecs) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "scsi %d:%d:%d:%d: timed out after %lu seconds waiting for %d outstanding command(s)\n",
+ ctrl_info->scsi_host->host_no, device->bus, device->target,
+ device->lun, msecs_waiting / 1000, cmds_outstanding);
+ return -ETIMEDOUT;
+ }
+ if (time_after(jiffies, warning_timeout)) {
+ dev_warn(&ctrl_info->pci_dev->dev,
+ "scsi %d:%d:%d:%d: waiting %lu seconds for %d outstanding command(s)\n",
+ ctrl_info->scsi_host->host_no, device->bus, device->target,
+ device->lun, msecs_waiting / 1000, cmds_outstanding);
+ warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * PQI_HZ) + jiffies;
}
usleep_range(1000, 2000);
}
@@ -5869,13 +5909,15 @@ static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
complete(waiting);
}
-#define PQI_LUN_RESET_TIMEOUT_SECS 30
#define PQI_LUN_RESET_POLL_COMPLETION_SECS 10
static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
struct pqi_scsi_dev *device, struct completion *wait)
{
int rc;
+ unsigned int wait_secs;
+
+ wait_secs = 0;
while (1) {
if (wait_for_completion_io_timeout(wait,
@@ -5889,13 +5931,21 @@ static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
rc = -ENXIO;
break;
}
+
+ wait_secs += PQI_LUN_RESET_POLL_COMPLETION_SECS;
+
+ dev_warn(&ctrl_info->pci_dev->dev,
+ "scsi %d:%d:%d:%d: waiting %u seconds for LUN reset to complete\n",
+ ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun,
+ wait_secs);
}
return rc;
}
-static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
- struct pqi_scsi_dev *device)
+#define PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS 30
+
+static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
{
int rc;
struct pqi_io_request *io_request;
@@ -5917,8 +5967,7 @@ static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
sizeof(request->lun_number));
request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
if (ctrl_info->tmf_iu_timeout_supported)
- put_unaligned_le16(PQI_LUN_RESET_TIMEOUT_SECS,
- &request->timeout);
+ put_unaligned_le16(PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS, &request->timeout);
pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
io_request);
@@ -5932,29 +5981,33 @@ static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
return rc;
}
-#define PQI_LUN_RESET_RETRIES 3
-#define PQI_LUN_RESET_RETRY_INTERVAL_MSECS 10000
-#define PQI_LUN_RESET_PENDING_IO_TIMEOUT_SECS 120
+#define PQI_LUN_RESET_RETRIES 3
+#define PQI_LUN_RESET_RETRY_INTERVAL_MSECS (10 * 1000)
+#define PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS (10 * 60 * 1000)
+#define PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS (2 * 60 * 1000)
-static int pqi_lun_reset_with_retries(struct pqi_ctrl_info *ctrl_info,
- struct pqi_scsi_dev *device)
+static int pqi_lun_reset_with_retries(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
{
- int rc;
+ int reset_rc;
+ int wait_rc;
unsigned int retries;
- unsigned long timeout_secs;
+ unsigned long timeout_msecs;
for (retries = 0;;) {
- rc = pqi_lun_reset(ctrl_info, device);
- if (rc == 0 || ++retries > PQI_LUN_RESET_RETRIES)
+ reset_rc = pqi_lun_reset(ctrl_info, device);
+ if (reset_rc == 0 || ++retries > PQI_LUN_RESET_RETRIES)
break;
msleep(PQI_LUN_RESET_RETRY_INTERVAL_MSECS);
}
- timeout_secs = rc ? PQI_LUN_RESET_PENDING_IO_TIMEOUT_SECS : NO_TIMEOUT;
+ timeout_msecs = reset_rc ? PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS :
+ PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS;
- rc |= pqi_device_wait_for_pending_io(ctrl_info, device, timeout_secs);
+ wait_rc = pqi_device_wait_for_pending_io(ctrl_info, device, timeout_msecs);
+ if (wait_rc && reset_rc == 0)
+ reset_rc = wait_rc;
- return rc == 0 ? SUCCESS : FAILED;
+ return reset_rc == 0 ? SUCCESS : FAILED;
}
static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
