From: Kevin Barnett <kevin.barnett@xxxxxxxxxxxxx> [ Upstream commit 0530736e40a0695b1ee2762e2684d00549699da4 ] Link: https://lore.kernel.org/r/157048748297.11757.3872221216800537383.stgit@brunhilda Reviewed-by: Scott Benesh <scott.benesh@xxxxxxxxxxxxx> Reviewed-by: Scott Teel <scott.teel@xxxxxxxxxxxxx> Signed-off-by: Kevin Barnett <kevin.barnett@xxxxxxxxxxxxx> Signed-off-by: Don Brace <don.brace@xxxxxxxxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/scsi/smartpqi/smartpqi.h | 9 +- drivers/scsi/smartpqi/smartpqi_init.c | 126 ++++++++++++++++++++++---- 2 files changed, 115 insertions(+), 20 deletions(-) diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h index 79d2af36f6552..2aa81b22f2695 100644 --- a/drivers/scsi/smartpqi/smartpqi.h +++ b/drivers/scsi/smartpqi/smartpqi.h @@ -1130,8 +1130,9 @@ struct pqi_ctrl_info { struct mutex ofa_mutex; /* serialize ofa */ bool controller_online; bool block_requests; - bool in_shutdown; + bool block_device_reset; bool in_ofa; + bool in_shutdown; u8 inbound_spanning_supported : 1; u8 outbound_spanning_supported : 1; u8 pqi_mode_enabled : 1; @@ -1173,6 +1174,7 @@ struct pqi_ctrl_info { struct pqi_ofa_memory *pqi_ofa_mem_virt_addr; dma_addr_t pqi_ofa_mem_dma_handle; void **pqi_ofa_chunk_virt_addr; + atomic_t sync_cmds_outstanding; }; enum pqi_ctrl_mode { @@ -1423,6 +1425,11 @@ static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info) return ctrl_info->block_requests; } +static inline bool pqi_device_reset_blocked(struct pqi_ctrl_info *ctrl_info) +{ + return ctrl_info->block_device_reset; +} + void pqi_sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost, struct sas_rphy *rphy); diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c index ea5409bebf578..793793343950e 100644 --- a/drivers/scsi/smartpqi/smartpqi_init.c +++ b/drivers/scsi/smartpqi/smartpqi_init.c @@ -249,6 +249,11 @@ static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info) scsi_unblock_requests(ctrl_info->scsi_host); } +static inline void pqi_ctrl_block_device_reset(struct pqi_ctrl_info *ctrl_info) +{ + ctrl_info->block_device_reset = true; +} + static unsigned long pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info, unsigned long timeout_msecs) { @@ -331,6 +336,16 @@ static inline bool pqi_device_in_remove(struct pqi_ctrl_info *ctrl_info, return device->in_remove && !ctrl_info->in_shutdown; } +static inline void pqi_ctrl_shutdown_start(struct pqi_ctrl_info *ctrl_info) +{ + ctrl_info->in_shutdown = true; +} + +static inline bool pqi_ctrl_in_shutdown(struct pqi_ctrl_info *ctrl_info) +{ + return ctrl_info->in_shutdown; +} + static inline void pqi_schedule_rescan_worker_with_delay( struct pqi_ctrl_info *ctrl_info, unsigned long delay) { @@ -360,6 +375,11 @@ static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info) cancel_delayed_work_sync(&ctrl_info->rescan_work); } +static inline void pqi_cancel_event_worker(struct pqi_ctrl_info *ctrl_info) +{ + cancel_work_sync(&ctrl_info->event_work); +} + static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info) { if (!ctrl_info->heartbeat_counter) @@ -4122,6 +4142,8 @@ static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info, goto out; } + atomic_inc(&ctrl_info->sync_cmds_outstanding); + io_request = pqi_alloc_io_request(ctrl_info); put_unaligned_le16(io_request->index, @@ -4168,6 +4190,7 @@ static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info, pqi_free_io_request(io_request); + atomic_dec(&ctrl_info->sync_cmds_outstanding); out: up(&ctrl_info->sync_request_sem); @@ -5402,7 +5425,7 @@ static int pqi_scsi_queue_command(struct Scsi_Host *shost, pqi_ctrl_busy(ctrl_info); if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device) || - pqi_ctrl_in_ofa(ctrl_info)) { + pqi_ctrl_in_ofa(ctrl_info) || pqi_ctrl_in_shutdown(ctrl_info)) { rc = SCSI_MLQUEUE_HOST_BUSY; goto out; } @@ -5650,6 +5673,18 @@ 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) { @@ -5787,17 +5822,17 @@ static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd) shost->host_no, device->bus, device->target, device->lun); pqi_check_ctrl_health(ctrl_info); - if (pqi_ctrl_offline(ctrl_info)) { - dev_err(&ctrl_info->pci_dev->dev, - "controller %u offlined - cannot send device reset\n", - ctrl_info->ctrl_id); + if (pqi_ctrl_offline(ctrl_info) || + pqi_device_reset_blocked(ctrl_info)) { rc = FAILED; goto out; } pqi_wait_until_ofa_finished(ctrl_info); + atomic_inc(&ctrl_info->sync_cmds_outstanding); rc = pqi_device_reset(ctrl_info, device); + atomic_dec(&ctrl_info->sync_cmds_outstanding); out: dev_err(&ctrl_info->pci_dev->dev, @@ -6119,7 +6154,8 @@ static int pqi_ioctl(struct scsi_device *sdev, unsigned int cmd, ctrl_info = shost_to_hba(sdev->host); - if (pqi_ctrl_in_ofa(ctrl_info)) + if (pqi_ctrl_in_ofa(ctrl_info) || + pqi_ctrl_in_shutdown(ctrl_info)) return -EBUSY; switch (cmd) { @@ -7074,13 +7110,20 @@ static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info) return pqi_revert_to_sis_mode(ctrl_info); } +#define PQI_POST_RESET_DELAY_B4_MSGU_READY 5000 + static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info) { int rc; - rc = pqi_force_sis_mode(ctrl_info); - if (rc) - return rc; + if (reset_devices) { + sis_soft_reset(ctrl_info); + msleep(PQI_POST_RESET_DELAY_B4_MSGU_READY); + } else { + rc = pqi_force_sis_mode(ctrl_info); + if (rc) + return rc; + } /* * Wait until the controller is ready to start accepting SIS @@ -7514,6 +7557,7 @@ 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); @@ -7787,8 +7831,6 @@ static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info) 0, NULL, NO_TIMEOUT); } -#define PQI_POST_RESET_DELAY_B4_MSGU_READY 5000 - static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info) { msleep(PQI_POST_RESET_DELAY_B4_MSGU_READY); @@ -7956,28 +7998,74 @@ static void pqi_pci_remove(struct pci_dev *pci_dev) pqi_remove_ctrl(ctrl_info); } +static void pqi_crash_if_pending_command(struct pqi_ctrl_info *ctrl_info) +{ + unsigned int i; + struct pqi_io_request *io_request; + struct scsi_cmnd *scmd; + + 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; + scmd = io_request->scmd; + WARN_ON(scmd != NULL); /* IO command from SML */ + WARN_ON(scmd == NULL); /* Non-IO cmd or driver initiated*/ + } +} + static void pqi_shutdown(struct pci_dev *pci_dev) { int rc; struct pqi_ctrl_info *ctrl_info; ctrl_info = pci_get_drvdata(pci_dev); - if (!ctrl_info) - goto error; + if (!ctrl_info) { + dev_err(&pci_dev->dev, + "cache could not be flushed\n"); + 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_ctrl_block_device_reset(ctrl_info); + pqi_wait_until_lun_reset_finished(ctrl_info); /* * Write all data in the controller's battery-backed cache to * storage. */ rc = pqi_flush_cache(ctrl_info, SHUTDOWN); - pqi_free_interrupts(ctrl_info); - pqi_reset(ctrl_info); - if (rc == 0) + if (rc) + 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); -error: - dev_warn(&pci_dev->dev, - "unable to flush controller cache\n"); } static void pqi_process_lockup_action_param(void) -- 2.20.1
