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([192.19.234.250]) by smtp.gmail.com with ESMTPSA id b3sm6317581pfv.61.2021.05.11.12.51.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 May 2021 12:51:24 -0700 (PDT) From: Kashyap Desai To: linux-scsi@vger.kernel.org Cc: jejb@linux.ibm.com, martin.petersen@oracle.com, steve.hagan@broadcom.com, peter.rivera@broadcom.com, mpi3mr-linuxdrv.pdl@broadcom.com, Kashyap Desai , sathya.prakash@broadcom.com Subject: [PATCH v4 05/24] mpi3mr: add support of internal watchdog thread Date: Wed, 12 May 2021 01:24:04 +0530 Message-Id: <20210511195423.2134562-6-kashyap.desai@broadcom.com> X-Mailer: git-send-email 2.18.1 In-Reply-To: <20210511195423.2134562-1-kashyap.desai@broadcom.com> References: <20210511195423.2134562-1-kashyap.desai@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000021638805c21338d8" Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org --00000000000021638805c21338d8 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 Reviewed-by: Hannes Reinecke Reviewed-by: Tomas Henzl Reviewed-by: Himanshu Madhani Cc: sathya.prakash@broadcom.com --- drivers/scsi/mpi3mr/mpi3mr.h | 11 +++ drivers/scsi/mpi3mr/mpi3mr_fw.c | 125 ++++++++++++++++++++++++++++++++ drivers/scsi/mpi3mr/mpi3mr_os.c | 5 +- 3 files changed, 140 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/mpi3mr/mpi3mr.h b/drivers/scsi/mpi3mr/mpi3mr.h index 8804dd027086..0ff2b3b1947b 100644 --- a/drivers/scsi/mpi3mr/mpi3mr.h +++ b/drivers/scsi/mpi3mr/mpi3mr.h @@ -478,6 +478,10 @@ 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 @@ -491,6 +495,7 @@ 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 @@ -572,6 +577,11 @@ 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; @@ -589,6 +599,7 @@ 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 7779e2b965e6..9a750f630d5e 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_fw.c +++ b/drivers/scsi/mpi3mr/mpi3mr_fw.c @@ -1463,6 +1463,129 @@ 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->host_diagnostic); + 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 * @mrioc: Adapter instance reference @@ -2609,6 +2732,8 @@ 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 7b3072e72c79..1587c8b029ad 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_os.c +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c @@ -281,7 +281,7 @@ void mpi3mr_process_op_reply_desc(struct mpi3mr_ioc *mrioc, case MPI3_IOCSTATUS_SUCCESS: scmd->result = (DID_OK << 16) | scsi_status; if ((scsi_state & (MPI3_SCSI_STATE_NO_SCSI_STATUS)) || - (sense_state == MPI3_SCSI_STATE_SENSE_FAILED) || + (sense_state == MPI3_SCSI_STATE_SENSE_FAILED) || (sense_state == MPI3_SCSI_STATE_SENSE_BUFF_Q_EMPTY)) scmd->result = DID_SOFT_ERROR << 16; else if (scsi_state & MPI3_SCSI_STATE_TERMINATED) @@ -568,6 +568,7 @@ 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; @@ -852,9 +853,11 @@ 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 --00000000000021638805c21338d8 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQcAYJKoZIhvcNAQcCoIIQYTCCEF0CAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3HMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT 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