diff options
author | Kevin Barnett <kevin.barnett@microchip.com> | 2021-03-11 23:17:31 +0300 |
---|---|---|
committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-04-06 06:02:32 +0300 |
commit | 18ff5f0877be9bf45079691939d2ff7af6e437ae (patch) | |
tree | e65900caf045d97fd085558e646935a0d368c2ad /drivers/scsi/smartpqi | |
parent | 55732a46d6c5289fb555bbdbff9c7222efd983c1 (diff) | |
download | linux-18ff5f0877be9bf45079691939d2ff7af6e437ae.tar.xz |
scsi: smartpqi: Add additional logging for LUN resets
LUN resets can take longer to complete. Adding in more driver logging helps
show where the driver is in the reset process.
Add a timeout in pqi_device_wait_for_pending_io() to cap how long the
driver will wait for outstanding commands.
Link: https://lore.kernel.org/r/161549385119.25025.10366493975709358647.stgit@brunhilda
Reviewed-by: Mahesh Rajashekhara <mahesh.rajashekhara@microchip.com>
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Signed-off-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/smartpqi')
-rw-r--r-- | drivers/scsi/smartpqi/smartpqi_init.c | 125 |
1 files 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, |