Watchdog thread is driver's internal thread which does few things like detecting FW fault and reset the controller, Timestamp sync etc. Signed-off-by: Kashyap Desai Cc: sathya.prakash@broadcom.com --- drivers/scsi/mpi3mr/mpi3mr.h | 11 +++ drivers/scsi/mpi3mr/mpi3mr_fw.c | 125 ++++++++++++++++++++++++++++++++ drivers/scsi/mpi3mr/mpi3mr_os.c | 3 + 3 files changed, 139 insertions(+) diff --git a/drivers/scsi/mpi3mr/mpi3mr.h b/drivers/scsi/mpi3mr/mpi3mr.h index f23751e25d0f..0fa38036dcf3 100644 --- a/drivers/scsi/mpi3mr/mpi3mr.h +++ b/drivers/scsi/mpi3mr/mpi3mr.h @@ -480,6 +480,10 @@ struct scmd_priv { * @sense_buf_q_dma: Sense buffer queue DMA address * @sbq_lock: Sense buffer queue lock * @sbq_host_index: Sense buffer queuehost index + * @watchdog_work_q_name: Fault watchdog worker thread name + * @watchdog_work_q: Fault watchdog worker thread + * @watchdog_work: Fault watchdog work + * @watchdog_lock: Fault watchdog lock * @is_driver_loading: Is driver still loading * @scan_started: Async scan started * @scan_failed: Asycn scan failed @@ -493,6 +497,7 @@ struct scmd_priv { * @chain_buf_lock: Chain buffer list lock * @reset_in_progress: Reset in progress flag * @unrecoverable: Controller unrecoverable flag + * @diagsave_timeout: Diagnostic information save timeout * @logging_level: Controller debug logging level * @current_event: Firmware event currently in process * @driver_info: Driver, Kernel, OS information to firmware @@ -574,6 +579,11 @@ struct mpi3mr_ioc { spinlock_t sbq_lock; u32 sbq_host_index; + char watchdog_work_q_name[20]; + struct workqueue_struct *watchdog_work_q; + struct delayed_work watchdog_work; + spinlock_t watchdog_lock; + u8 is_driver_loading; u8 scan_started; u16 scan_failed; @@ -591,6 +601,7 @@ struct mpi3mr_ioc { u8 reset_in_progress; u8 unrecoverable; + u16 diagsave_timeout; int logging_level; struct mpi3mr_fwevt *current_event; diff --git a/drivers/scsi/mpi3mr/mpi3mr_fw.c b/drivers/scsi/mpi3mr/mpi3mr_fw.c index abdf8c653e6b..4f1524dcad4d 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_fw.c +++ b/drivers/scsi/mpi3mr/mpi3mr_fw.c @@ -1480,6 +1480,129 @@ int mpi3mr_op_request_post(struct mpi3mr_ioc *mrioc, return retval; } +/** + * mpi3mr_watchdog_work - watchdog thread to monitor faults + * @work: work struct + * + * Watch dog work periodically executed (1 second interval) to + * monitor firmware fault and to issue periodic timer sync to + * the firmware. + * + * Return: Nothing. + */ +static void mpi3mr_watchdog_work(struct work_struct *work) +{ + struct mpi3mr_ioc *mrioc = + container_of(work, struct mpi3mr_ioc, watchdog_work.work); + unsigned long flags; + enum mpi3mr_iocstate ioc_state; + u32 fault, host_diagnostic; + + /*Check for fault state every one second and issue Soft reset*/ + ioc_state = mpi3mr_get_iocstate(mrioc); + if (ioc_state == MRIOC_STATE_FAULT) { + fault = readl(&mrioc->sysif_regs->Fault) & + MPI3_SYSIF_FAULT_CODE_MASK; + host_diagnostic = readl(&mrioc->sysif_regs->HostDiagnostic); + if (host_diagnostic & MPI3_SYSIF_HOST_DIAG_SAVE_IN_PROGRESS) { + if (!mrioc->diagsave_timeout) { + mpi3mr_print_fault_info(mrioc); + ioc_warn(mrioc, "Diag save in progress\n"); + } + if ((mrioc->diagsave_timeout++) <= + MPI3_SYSIF_DIAG_SAVE_TIMEOUT) + goto schedule_work; + } else + mpi3mr_print_fault_info(mrioc); + mrioc->diagsave_timeout = 0; + + if (fault == MPI3_SYSIF_FAULT_CODE_FACTORY_RESET) { + ioc_info(mrioc, + "Factory Reset Fault occurred marking controller as unrecoverable" + ); + mrioc->unrecoverable = 1; + goto out; + } + + if ((fault == MPI3_SYSIF_FAULT_CODE_DIAG_FAULT_RESET) + || (fault == MPI3_SYSIF_FAULT_CODE_SOFT_RESET_IN_PROGRESS) + || (mrioc->reset_in_progress)) + goto out; + if (fault == MPI3_SYSIF_FAULT_CODE_CI_ACTIVATION_RESET) + mpi3mr_soft_reset_handler(mrioc, + MPI3MR_RESET_FROM_CIACTIV_FAULT, 0); + else + mpi3mr_soft_reset_handler(mrioc, + MPI3MR_RESET_FROM_FAULT_WATCH, 0); + } + +schedule_work: + spin_lock_irqsave(&mrioc->watchdog_lock, flags); + if (mrioc->watchdog_work_q) + queue_delayed_work(mrioc->watchdog_work_q, + &mrioc->watchdog_work, + msecs_to_jiffies(MPI3MR_WATCHDOG_INTERVAL)); + spin_unlock_irqrestore(&mrioc->watchdog_lock, flags); +out: + return; +} + +/** + * mpi3mr_start_watchdog - Start watchdog + * @mrioc: Adapter instance reference + * + * Create and start the watchdog thread to monitor controller + * faults. + * + * Return: Nothing. + */ +void mpi3mr_start_watchdog(struct mpi3mr_ioc *mrioc) +{ + if (mrioc->watchdog_work_q) + return; + + INIT_DELAYED_WORK(&mrioc->watchdog_work, mpi3mr_watchdog_work); + snprintf(mrioc->watchdog_work_q_name, + sizeof(mrioc->watchdog_work_q_name), "watchdog_%s%d", mrioc->name, + mrioc->id); + mrioc->watchdog_work_q = + create_singlethread_workqueue(mrioc->watchdog_work_q_name); + if (!mrioc->watchdog_work_q) { + ioc_err(mrioc, "%s: failed (line=%d)\n", __func__, __LINE__); + return; + } + + if (mrioc->watchdog_work_q) + queue_delayed_work(mrioc->watchdog_work_q, + &mrioc->watchdog_work, + msecs_to_jiffies(MPI3MR_WATCHDOG_INTERVAL)); +} + +/** + * mpi3mr_stop_watchdog - Stop watchdog + * @mrioc: Adapter instance reference + * + * Stop the watchdog thread created to monitor controller + * faults. + * + * Return: Nothing. + */ +void mpi3mr_stop_watchdog(struct mpi3mr_ioc *mrioc) +{ + unsigned long flags; + struct workqueue_struct *wq; + + spin_lock_irqsave(&mrioc->watchdog_lock, flags); + wq = mrioc->watchdog_work_q; + mrioc->watchdog_work_q = NULL; + spin_unlock_irqrestore(&mrioc->watchdog_lock, flags); + if (wq) { + if (!cancel_delayed_work_sync(&mrioc->watchdog_work)) + flush_workqueue(wq); + destroy_workqueue(wq); + } +} + /** * mpi3mr_setup_admin_qpair - Setup admin queue pair @@ -2634,6 +2757,8 @@ void mpi3mr_cleanup_ioc(struct mpi3mr_ioc *mrioc) { enum mpi3mr_iocstate ioc_state; + mpi3mr_stop_watchdog(mrioc); + mpi3mr_ioc_disable_intr(mrioc); ioc_state = mpi3mr_get_iocstate(mrioc); diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c index 01be5f337826..7b0d52481929 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_os.c +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c @@ -570,6 +570,7 @@ static int mpi3mr_scan_finished(struct Scsi_Host *shost, if (mrioc->scan_started) return 0; ioc_info(mrioc, "%s :port enable: SUCCESS\n", __func__); + mpi3mr_start_watchdog(mrioc); mrioc->is_driver_loading = 0; return 1; @@ -856,9 +857,11 @@ mpi3mr_probe(struct pci_dev *pdev, const struct pci_device_id *id) spin_lock_init(&mrioc->admin_req_lock); spin_lock_init(&mrioc->reply_free_queue_lock); spin_lock_init(&mrioc->sbq_lock); + spin_lock_init(&mrioc->watchdog_lock); spin_lock_init(&mrioc->chain_buf_lock); mpi3mr_init_drv_cmd(&mrioc->init_cmds, MPI3MR_HOSTTAG_INITCMDS); + if (pdev->revision) mrioc->enable_segqueue = true; -- 2.18.1 -- This electronic communication and the information and any files transmitted with it, or attached to it, are confidential and are intended solely for the use of the individual or entity to whom it is addressed and may contain information that is confidential, legally privileged, protected by privacy laws, or otherwise restricted from disclosure to anyone else. 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