From 78b76a0768ef8a25ab92a28da4ac9a74db762c47 Mon Sep 17 00:00:00 2001 From: Sreekanth Reddy Date: Mon, 20 Dec 2021 19:41:53 +0530 Subject: [PATCH] scsi: mpi3mr: Support Prepare for Reset event The IOC sends a Prepare for Reset Event to the host to prepare for a Soft Reset. This event data has two reason codes: 1. Start - The host is expected to gracefully quiesce all I/O within approximately 1 second. 2. Abort - The IOC is requesting to abort a previous Prepare for Reset Event request. Normal I/O may be resumed. Link: https://lore.kernel.org/r/20211220141159.16117-20-sreekanth.reddy@broadcom.com Signed-off-by: Sreekanth Reddy Signed-off-by: Martin K. Petersen --- drivers/scsi/mpi3mr/mpi3mr.h | 6 +++ drivers/scsi/mpi3mr/mpi3mr_fw.c | 83 +++++++++++++++++++++++++---------------- drivers/scsi/mpi3mr/mpi3mr_os.c | 40 ++++++++++++++++++++ 3 files changed, 96 insertions(+), 33 deletions(-) diff --git a/drivers/scsi/mpi3mr/mpi3mr.h b/drivers/scsi/mpi3mr/mpi3mr.h index 2602957..8dd669f 100644 --- a/drivers/scsi/mpi3mr/mpi3mr.h +++ b/drivers/scsi/mpi3mr/mpi3mr.h @@ -114,6 +114,7 @@ extern int prot_mask; #define MPI3MR_TSUPDATE_INTERVAL 900 #define MPI3MR_DEFAULT_SHUTDOWN_TIME 120 #define MPI3MR_RAID_ERRREC_RESET_TIMEOUT 180 +#define MPI3MR_PREPARE_FOR_RESET_TIMEOUT 180 #define MPI3MR_RESET_ACK_TIMEOUT 30 #define MPI3MR_WATCHDOG_INTERVAL 1000 /* in milli seconds */ @@ -693,6 +694,8 @@ struct scmd_priv { * @prev_reset_result: Result of previous reset * @reset_mutex: Controller reset mutex * @reset_waitq: Controller reset wait queue + * @prepare_for_reset: Prepare for reset event received + * @prepare_for_reset_timeout_counter: Prepare for reset timeout * @diagsave_timeout: Diagnostic information save timeout * @logging_level: Controller debug logging level * @flush_io_count: I/O count to flush after reset @@ -825,6 +828,9 @@ struct mpi3mr_ioc { struct mutex reset_mutex; wait_queue_head_t reset_waitq; + u8 prepare_for_reset; + u16 prepare_for_reset_timeout_counter; + u16 diagsave_timeout; int logging_level; u16 flush_io_count; diff --git a/drivers/scsi/mpi3mr/mpi3mr_fw.c b/drivers/scsi/mpi3mr/mpi3mr_fw.c index b25f8e5..a9491f7 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_fw.c +++ b/drivers/scsi/mpi3mr/mpi3mr_fw.c @@ -2262,7 +2262,8 @@ static void mpi3mr_watchdog_work(struct work_struct *work) container_of(work, struct mpi3mr_ioc, watchdog_work.work); unsigned long flags; enum mpi3mr_iocstate ioc_state; - u32 fault, host_diagnostic; + u32 fault, host_diagnostic, ioc_status; + u32 reset_reason = MPI3MR_RESET_FROM_FAULT_WATCH; if (mrioc->reset_in_progress || mrioc->unrecoverable) return; @@ -2272,43 +2273,55 @@ static void mpi3mr_watchdog_work(struct work_struct *work) mpi3mr_sync_timestamp(mrioc); } + if ((mrioc->prepare_for_reset) && + ((mrioc->prepare_for_reset_timeout_counter++) >= + MPI3MR_PREPARE_FOR_RESET_TIMEOUT)) { + mpi3mr_soft_reset_handler(mrioc, + MPI3MR_RESET_FROM_CIACTVRST_TIMER, 1); + return; + } + + ioc_status = readl(&mrioc->sysif_regs->ioc_status); + if (ioc_status & MPI3_SYSIF_IOC_STATUS_RESET_HISTORY) { + mpi3mr_soft_reset_handler(mrioc, MPI3MR_RESET_FROM_FIRMWARE, 0); + return; + } + /*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 (ioc_state != MRIOC_STATE_FAULT) + goto schedule_work; - if (fault == MPI3_SYSIF_FAULT_CODE_POWER_CYCLE_REQUIRED) { - ioc_info(mrioc, - "Factory Reset fault occurred marking controller as unrecoverable" - ); - mrioc->unrecoverable = 1; - goto out; + 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; + } - 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); + mpi3mr_print_fault_info(mrioc); + mrioc->diagsave_timeout = 0; + + switch (fault) { + case MPI3_SYSIF_FAULT_CODE_POWER_CYCLE_REQUIRED: + ioc_info(mrioc, + "controller requires system power cycle, marking controller as unrecoverable\n"); + mrioc->unrecoverable = 1; + return; + case MPI3_SYSIF_FAULT_CODE_SOFT_RESET_IN_PROGRESS: + return; + case MPI3_SYSIF_FAULT_CODE_CI_ACTIVATION_RESET: + reset_reason = MPI3MR_RESET_FROM_CIACTIV_FAULT; + break; + default: + break; } + mpi3mr_soft_reset_handler(mrioc, reset_reason, 0); + return; schedule_work: spin_lock_irqsave(&mrioc->watchdog_lock, flags); @@ -2317,7 +2330,6 @@ schedule_work: &mrioc->watchdog_work, msecs_to_jiffies(MPI3MR_WATCHDOG_INTERVAL)); spin_unlock_irqrestore(&mrioc->watchdog_lock, flags); -out: return; } @@ -3488,6 +3500,7 @@ static int mpi3mr_enable_events(struct mpi3mr_ioc *mrioc) mpi3mr_unmask_events(mrioc, MPI3_EVENT_SAS_BROADCAST_PRIMITIVE); mpi3mr_unmask_events(mrioc, MPI3_EVENT_PCIE_TOPOLOGY_CHANGE_LIST); mpi3mr_unmask_events(mrioc, MPI3_EVENT_PCIE_ENUMERATION); + mpi3mr_unmask_events(mrioc, MPI3_EVENT_PREPARE_FOR_RESET); mpi3mr_unmask_events(mrioc, MPI3_EVENT_CABLE_MGMT); mpi3mr_unmask_events(mrioc, MPI3_EVENT_ENERGY_PACK_CHANGE); @@ -4223,6 +4236,10 @@ int mpi3mr_soft_reset_handler(struct mpi3mr_ioc *mrioc, mpi3mr_cleanup_fwevt_list(mrioc); mpi3mr_flush_host_io(mrioc); mpi3mr_invalidate_devhandles(mrioc); + if (mrioc->prepare_for_reset) { + mrioc->prepare_for_reset = 0; + mrioc->prepare_for_reset_timeout_counter = 0; + } mpi3mr_memset_buffers(mrioc); retval = mpi3mr_reinit_ioc(mrioc, 0); if (retval) { diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c index 728d6ce..192986f 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_os.c +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c @@ -1989,6 +1989,40 @@ out: } /** + * mpi3mr_preparereset_evt_th - Prepare for reset event tophalf + * @mrioc: Adapter instance reference + * @event_reply: event data + * + * Blocks and unblocks host level I/O based on the reason code + * + * Return: Nothing + */ +static void mpi3mr_preparereset_evt_th(struct mpi3mr_ioc *mrioc, + struct mpi3_event_notification_reply *event_reply) +{ + struct mpi3_event_data_prepare_for_reset *evtdata = + (struct mpi3_event_data_prepare_for_reset *)event_reply->event_data; + + if (evtdata->reason_code == MPI3_EVENT_PREPARE_RESET_RC_START) { + dprint_event_th(mrioc, + "prepare for reset event top half with rc=start\n"); + if (mrioc->prepare_for_reset) + return; + mrioc->prepare_for_reset = 1; + mrioc->prepare_for_reset_timeout_counter = 0; + } else if (evtdata->reason_code == MPI3_EVENT_PREPARE_RESET_RC_ABORT) { + dprint_event_th(mrioc, + "prepare for reset top half with rc=abort\n"); + mrioc->prepare_for_reset = 0; + mrioc->prepare_for_reset_timeout_counter = 0; + } + if ((event_reply->msg_flags & MPI3_EVENT_NOTIFY_MSGFLAGS_ACK_MASK) + == MPI3_EVENT_NOTIFY_MSGFLAGS_ACK_REQUIRED) + mpi3mr_send_event_ack(mrioc, event_reply->event, NULL, + le32_to_cpu(event_reply->event_context)); +} + +/** * mpi3mr_energypackchg_evt_th - Energy pack change evt tophalf * @mrioc: Adapter instance reference * @event_reply: event data @@ -2075,6 +2109,12 @@ void mpi3mr_os_handle_events(struct mpi3mr_ioc *mrioc, mpi3mr_pcietopochg_evt_th(mrioc, event_reply); break; } + case MPI3_EVENT_PREPARE_FOR_RESET: + { + mpi3mr_preparereset_evt_th(mrioc, event_reply); + ack_req = 0; + break; + } case MPI3_EVENT_DEVICE_INFO_CHANGED: { process_evt_bh = 1; -- 2.7.4