From: Kevin Barnett <kevin.barnett@microchip.com>
Date: Thu, 11 Mar 2021 14:16:44 -0600
Subject: scsi: smartpqi: Update suspend/resume and shutdown
Git-commit: 9fa8202336096d124a8433d67c6d1deb59b1a0d5
Patch-mainline: v5.13-rc1
References: bsc#1186472
For suspend/resume and shutdown prevent: Controller events, any new I/O
requests, controller requests, REGNEWD, and reset operations.
Wait for any pending completions from the controller to complete to avoid
controller NMI events.
Link: https://lore.kernel.org/r/161549380398.25025.12266769502766103580.stgit@brunhilda
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Scott Benesh <scott.benesh@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>
Acked-by: Lee Duncan <lduncan@suse.com>
---
drivers/scsi/smartpqi/smartpqi.h | 11 +---
drivers/scsi/smartpqi/smartpqi_init.c | 113 +++++++++++++++++++---------------
2 files changed, 64 insertions(+), 60 deletions(-)
diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h
index ba7d26364b84..fa1ebeea777d 100644
--- a/drivers/scsi/smartpqi/smartpqi.h
+++ b/drivers/scsi/smartpqi/smartpqi.h
@@ -1295,6 +1295,7 @@ struct pqi_ctrl_info {
struct mutex ofa_mutex; /* serialize ofa */
bool controller_online;
bool block_requests;
+ bool scan_blocked;
bool in_ofa;
bool in_shutdown;
u8 inbound_spanning_supported : 1;
@@ -1624,16 +1625,6 @@ struct bmic_diag_options {
#pragma pack()
-static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
-{
- atomic_inc(&ctrl_info->num_busy_threads);
-}
-
-static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
-{
- atomic_dec(&ctrl_info->num_busy_threads);
-}
-
static inline struct pqi_ctrl_info *shost_to_hba(struct Scsi_Host *shost)
{
void *hostdata = shost_priv(shost);
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index cc2b29a67ba0..4f7a38b96356 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -54,7 +54,6 @@ MODULE_LICENSE("GPL");
static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
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);
static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
@@ -245,6 +244,23 @@ static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
sis_write_driver_scratch(ctrl_info, mode);
}
+static inline void pqi_ctrl_block_scan(struct pqi_ctrl_info *ctrl_info)
+{
+ ctrl_info->scan_blocked = true;
+ mutex_lock(&ctrl_info->scan_mutex);
+}
+
+static inline void pqi_ctrl_unblock_scan(struct pqi_ctrl_info *ctrl_info)
+{
+ ctrl_info->scan_blocked = false;
+ mutex_unlock(&ctrl_info->scan_mutex);
+}
+
+static inline bool pqi_ctrl_scan_blocked(struct pqi_ctrl_info *ctrl_info)
+{
+ return ctrl_info->scan_blocked;
+}
+
static inline void pqi_ctrl_block_device_reset(struct pqi_ctrl_info *ctrl_info)
{
mutex_lock(&ctrl_info->lun_reset_mutex);
@@ -255,6 +271,41 @@ static inline void pqi_ctrl_unblock_device_reset(struct pqi_ctrl_info *ctrl_info
mutex_unlock(&ctrl_info->lun_reset_mutex);
}
+static inline void pqi_scsi_block_requests(struct pqi_ctrl_info *ctrl_info)
+{
+ struct Scsi_Host *shost;
+ unsigned int num_loops;
+ int msecs_sleep;
+
+ shost = ctrl_info->scsi_host;
+
+ scsi_block_requests(shost);
+
+ num_loops = 0;
+ msecs_sleep = 20;
+ while (scsi_host_busy(shost)) {
+ num_loops++;
+ if (num_loops == 10)
+ msecs_sleep = 500;
+ msleep(msecs_sleep);
+ }
+}
+
+static inline void pqi_scsi_unblock_requests(struct pqi_ctrl_info *ctrl_info)
+{
+ scsi_unblock_requests(ctrl_info->scsi_host);
+}
+
+static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
+{
+ atomic_inc(&ctrl_info->num_busy_threads);
+}
+
+static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
+{
+ atomic_dec(&ctrl_info->num_busy_threads);
+}
+
static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
{
return ctrl_info->block_requests;
@@ -263,15 +314,12 @@ static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
{
ctrl_info->block_requests = true;
- scsi_block_requests(ctrl_info->scsi_host);
}
static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
{
ctrl_info->block_requests = false;
wake_up_all(&ctrl_info->block_requests_wait);
- pqi_retry_raid_bypass_requests(ctrl_info);
- scsi_unblock_requests(ctrl_info->scsi_host);
}
static void pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
@@ -5999,18 +6047,6 @@ static int pqi_ctrl_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
return 0;
}
-static int pqi_ctrl_wait_for_pending_sync_cmds(struct pqi_ctrl_info *ctrl_info)
-{
- while (atomic_read(&ctrl_info->sync_cmds_outstanding)) {
- pqi_check_ctrl_health(ctrl_info);
- if (pqi_ctrl_offline(ctrl_info))
- return -ENXIO;
- usleep_range(1000, 2000);
- }
-
- return 0;
-}
-
static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
void *context)
{
@@ -8208,7 +8244,6 @@ static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
atomic_set(&ctrl_info->num_interrupts, 0);
- atomic_set(&ctrl_info->sync_cmds_outstanding, 0);
INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
@@ -8683,24 +8718,12 @@ static void pqi_shutdown(struct pci_dev *pci_dev)
return;
}
- pqi_disable_events(ctrl_info);
pqi_wait_until_ofa_finished(ctrl_info);
- pqi_cancel_update_time_worker(ctrl_info);
- pqi_cancel_rescan_worker(ctrl_info);
- pqi_cancel_event_worker(ctrl_info);
-
- pqi_ctrl_shutdown_start(ctrl_info);
- pqi_ctrl_wait_until_quiesced(ctrl_info);
-
- rc = pqi_ctrl_wait_for_pending_io(ctrl_info, NO_TIMEOUT);
- if (rc) {
- dev_err(&pci_dev->dev,
- "wait for pending I/O failed\n");
- return;
- }
+ pqi_scsi_block_requests(ctrl_info);
pqi_ctrl_block_device_reset(ctrl_info);
- pqi_wait_until_lun_reset_finished(ctrl_info);
+ pqi_ctrl_block_requests(ctrl_info);
+ pqi_ctrl_wait_until_quiesced(ctrl_info);
/*
* Write all data in the controller's battery-backed cache to
@@ -8711,15 +8734,6 @@ static void pqi_shutdown(struct pci_dev *pci_dev)
dev_err(&pci_dev->dev,
"unable to flush controller cache\n");
- pqi_ctrl_block_requests(ctrl_info);
-
- rc = pqi_ctrl_wait_for_pending_sync_cmds(ctrl_info);
- if (rc) {
- dev_err(&pci_dev->dev,
- "wait for pending sync cmds failed\n");
- return;
- }
-
pqi_crash_if_pending_command(ctrl_info);
pqi_reset(ctrl_info);
}
@@ -8754,19 +8768,18 @@ static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t stat
ctrl_info = pci_get_drvdata(pci_dev);
- pqi_disable_events(ctrl_info);
- pqi_cancel_update_time_worker(ctrl_info);
- pqi_cancel_rescan_worker(ctrl_info);
- pqi_wait_until_scan_finished(ctrl_info);
- pqi_wait_until_lun_reset_finished(ctrl_info);
pqi_wait_until_ofa_finished(ctrl_info);
- pqi_flush_cache(ctrl_info, SUSPEND);
+
+ pqi_ctrl_block_scan(ctrl_info);
+ pqi_scsi_block_requests(ctrl_info);
+ pqi_ctrl_block_device_reset(ctrl_info);
pqi_ctrl_block_requests(ctrl_info);
pqi_ctrl_wait_until_quiesced(ctrl_info);
- pqi_wait_until_inbound_queues_empty(ctrl_info);
- pqi_ctrl_wait_for_pending_io(ctrl_info, NO_TIMEOUT);
+ pqi_flush_cache(ctrl_info, SUSPEND);
pqi_stop_heartbeat_timer(ctrl_info);
+ pqi_crash_if_pending_command(ctrl_info);
+
if (state.event == PM_EVENT_FREEZE)
return 0;
@@ -8799,8 +8812,8 @@ static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
pci_dev->irq, rc);
return rc;
}
- pqi_start_heartbeat_timer(ctrl_info);
pqi_ctrl_unblock_requests(ctrl_info);
+ pqi_scsi_unblock_requests(ctrl_info);
return 0;
}