From f1c35e6aea579d5bdb6dc02dfa99c67c7c3b3f67 Mon Sep 17 00:00:00 2001 From: "Kashyap, Desai" Date: Tue, 9 Mar 2010 16:31:43 +0530 Subject: [SCSI] mpt2sas: RESCAN Barrier work is added in case of HBA reset. Add the cancel_pending_work flag from the fw_event_work structure, and then to set the flag during host reset, check the flag later from work threads context and if cancel_pending_work_flag is set ingore those events. Now Rescan after host reset is changed. Added special task MPT2SAS_RESCAN_AFTER_HOST_RESET. This task will be queued at the time of HBA reset. this task is treated as barrier. All work after MPT2SAS_RESCAN_AFTER_HOST_RESET will be treated as new work and will be server by callback handle. If host_recovery is going on while running RESCAN task, it will wait for shos_recovery_done completion which will be called from HBA reset DONE context. Signed-off-by: Kashyap Desai Reviewed-by: Eric Moore Signed-off-by: James Bottomley --- drivers/scsi/mpt2sas/mpt2sas_base.c | 5 +- drivers/scsi/mpt2sas/mpt2sas_base.h | 3 +- drivers/scsi/mpt2sas/mpt2sas_scsih.c | 140 +++++++++++++++++++---------------- 3 files changed, 79 insertions(+), 69 deletions(-) (limited to 'drivers/scsi/mpt2sas') diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c index 88e6eebc3159..da4bfbf95a7a 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_base.c +++ b/drivers/scsi/mpt2sas/mpt2sas_base.c @@ -3607,6 +3607,8 @@ mpt2sas_base_attach(struct MPT2SAS_ADAPTER *ioc) ioc->ctl_cmds.status = MPT2_CMD_NOT_USED; mutex_init(&ioc->ctl_cmds.mutex); + init_completion(&ioc->shost_recovery_done); + for (i = 0; i < MPI2_EVENT_NOTIFY_EVENTMASK_WORDS; i++) ioc->event_masks[i] = -1; @@ -3811,9 +3813,8 @@ mpt2sas_base_hard_reset_handler(struct MPT2SAS_ADAPTER *ioc, int sleep_flag, spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags); ioc->shost_recovery = 0; + complete(&ioc->shost_recovery_done); spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags); - if (!r) - _base_reset_handler(ioc, MPT2_IOC_RUNNING); return r; } diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.h b/drivers/scsi/mpt2sas/mpt2sas_base.h index e18b0544c38f..a5ec09f7c90a 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_base.h +++ b/drivers/scsi/mpt2sas/mpt2sas_base.h @@ -119,7 +119,6 @@ #define MPT2_IOC_PRE_RESET 1 /* prior to host reset */ #define MPT2_IOC_AFTER_RESET 2 /* just after host reset */ #define MPT2_IOC_DONE_RESET 3 /* links re-initialized */ -#define MPT2_IOC_RUNNING 4 /* shost running */ /* * logging format @@ -603,7 +602,6 @@ struct MPT2SAS_ADAPTER { /* fw event handler */ char firmware_event_name[20]; struct workqueue_struct *firmware_event_thread; - u8 fw_events_off; spinlock_t fw_event_lock; struct list_head fw_event_list; @@ -611,6 +609,7 @@ struct MPT2SAS_ADAPTER { int aen_event_read_flag; u8 broadcast_aen_busy; u8 shost_recovery; + struct completion shost_recovery_done; spinlock_t ioc_reset_in_progress_lock; u8 ioc_link_reset_in_progress; u8 ignore_loginfos; diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c index aa67b757bf23..6f121a904d05 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c +++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c @@ -109,14 +109,16 @@ struct sense_info { }; +#define MPT2SAS_RESCAN_AFTER_HOST_RESET (0xFFFF) + /** * struct fw_event_work - firmware event struct * @list: link list framework * @work: work object (ioc->fault_reset_work_q) + * @cancel_pending_work: flag set during reset handling * @ioc: per adapter object * @VF_ID: virtual function id * @VP_ID: virtual port id - * @host_reset_handling: handling events during host reset * @ignore: flag meaning this event has been marked to ignore * @event: firmware event MPI2_EVENT_XXX defined in mpt2_ioc.h * @event_data: reply event data payload follows @@ -125,11 +127,11 @@ struct sense_info { */ struct fw_event_work { struct list_head list; - struct work_struct work; + u8 cancel_pending_work; + struct delayed_work delayed_work; struct MPT2SAS_ADAPTER *ioc; u8 VF_ID; u8 VP_ID; - u8 host_reset_handling; u8 ignore; u16 event; void *event_data; @@ -2325,8 +2327,9 @@ _scsih_fw_event_add(struct MPT2SAS_ADAPTER *ioc, struct fw_event_work *fw_event) spin_lock_irqsave(&ioc->fw_event_lock, flags); list_add_tail(&fw_event->list, &ioc->fw_event_list); - INIT_WORK(&fw_event->work, _firmware_event_work); - queue_work(ioc->firmware_event_thread, &fw_event->work); + INIT_DELAYED_WORK(&fw_event->delayed_work, _firmware_event_work); + queue_delayed_work(ioc->firmware_event_thread, + &fw_event->delayed_work, 0); spin_unlock_irqrestore(&ioc->fw_event_lock, flags); } @@ -2353,62 +2356,55 @@ _scsih_fw_event_free(struct MPT2SAS_ADAPTER *ioc, struct fw_event_work spin_unlock_irqrestore(&ioc->fw_event_lock, flags); } + /** - * _scsih_fw_event_add - requeue an event + * _scsih_queue_rescan - queue a topology rescan from user context * @ioc: per adapter object - * @fw_event: object describing the event - * Context: This function will acquire ioc->fw_event_lock. * * Return nothing. */ static void -_scsih_fw_event_requeue(struct MPT2SAS_ADAPTER *ioc, struct fw_event_work - *fw_event, unsigned long delay) +_scsih_queue_rescan(struct MPT2SAS_ADAPTER *ioc) { - unsigned long flags; - if (ioc->firmware_event_thread == NULL) - return; + struct fw_event_work *fw_event; - spin_lock_irqsave(&ioc->fw_event_lock, flags); - queue_work(ioc->firmware_event_thread, &fw_event->work); - spin_unlock_irqrestore(&ioc->fw_event_lock, flags); + if (ioc->wait_for_port_enable_to_complete) + return; + fw_event = kzalloc(sizeof(struct fw_event_work), GFP_ATOMIC); + if (!fw_event) + return; + fw_event->event = MPT2SAS_RESCAN_AFTER_HOST_RESET; + fw_event->ioc = ioc; + _scsih_fw_event_add(ioc, fw_event); } /** - * _scsih_fw_event_off - turn flag off preventing event handling + * _scsih_fw_event_cleanup_queue - cleanup event queue * @ioc: per adapter object * - * Used to prevent handling of firmware events during adapter reset - * driver unload. + * Walk the firmware event queue, either killing timers, or waiting + * for outstanding events to complete * * Return nothing. */ static void -_scsih_fw_event_off(struct MPT2SAS_ADAPTER *ioc) +_scsih_fw_event_cleanup_queue(struct MPT2SAS_ADAPTER *ioc) { - unsigned long flags; + struct fw_event_work *fw_event, *next; - spin_lock_irqsave(&ioc->fw_event_lock, flags); - ioc->fw_events_off = 1; - spin_unlock_irqrestore(&ioc->fw_event_lock, flags); + if (list_empty(&ioc->fw_event_list) || + !ioc->firmware_event_thread || in_interrupt()) + return; + list_for_each_entry_safe(fw_event, next, &ioc->fw_event_list, list) { + if (cancel_delayed_work(&fw_event->delayed_work)) { + _scsih_fw_event_free(ioc, fw_event); + continue; + } + fw_event->cancel_pending_work = 1; + } } -/** - * _scsih_fw_event_on - turn flag on allowing firmware event handling - * @ioc: per adapter object - * - * Returns nothing. - */ -static void -_scsih_fw_event_on(struct MPT2SAS_ADAPTER *ioc) -{ - unsigned long flags; - - spin_lock_irqsave(&ioc->fw_event_lock, flags); - ioc->fw_events_off = 0; - spin_unlock_irqrestore(&ioc->fw_event_lock, flags); -} /** * _scsih_ublock_io_device - set the device state to SDEV_RUNNING @@ -5694,13 +5690,13 @@ _scsih_search_responding_expanders(struct MPT2SAS_ADAPTER *ioc) } /** - * _scsih_remove_unresponding_devices - removing unresponding devices + * _scsih_remove_unresponding_sas_devices - removing unresponding devices * @ioc: per adapter object * * Return nothing. */ static void -_scsih_remove_unresponding_devices(struct MPT2SAS_ADAPTER *ioc) +_scsih_remove_unresponding_sas_devices(struct MPT2SAS_ADAPTER *ioc) { struct _sas_device *sas_device, *sas_device_next; struct _sas_node *sas_expander; @@ -5774,31 +5770,28 @@ mpt2sas_scsih_reset_handler(struct MPT2SAS_ADAPTER *ioc, int reset_phase) case MPT2_IOC_PRE_RESET: dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: " "MPT2_IOC_PRE_RESET\n", ioc->name, __func__)); - _scsih_fw_event_off(ioc); break; case MPT2_IOC_AFTER_RESET: dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: " "MPT2_IOC_AFTER_RESET\n", ioc->name, __func__)); + if (ioc->scsih_cmds.status & MPT2_CMD_PENDING) { + ioc->scsih_cmds.status |= MPT2_CMD_RESET; + mpt2sas_base_free_smid(ioc, ioc->scsih_cmds.smid); + complete(&ioc->scsih_cmds.done); + } if (ioc->tm_cmds.status & MPT2_CMD_PENDING) { ioc->tm_cmds.status |= MPT2_CMD_RESET; mpt2sas_base_free_smid(ioc, ioc->tm_cmds.smid); complete(&ioc->tm_cmds.done); } - _scsih_fw_event_on(ioc); + _scsih_fw_event_cleanup_queue(ioc); _scsih_flush_running_cmds(ioc); + _scsih_queue_rescan(ioc); break; case MPT2_IOC_DONE_RESET: dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: " "MPT2_IOC_DONE_RESET\n", ioc->name, __func__)); _scsih_sas_host_refresh(ioc); - _scsih_search_responding_sas_devices(ioc); - _scsih_search_responding_raid_devices(ioc); - _scsih_search_responding_expanders(ioc); - break; - case MPT2_IOC_RUNNING: - dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: " - "MPT2_IOC_RUNNING\n", ioc->name, __func__)); - _scsih_remove_unresponding_devices(ioc); break; } } @@ -5815,21 +5808,31 @@ static void _firmware_event_work(struct work_struct *work) { struct fw_event_work *fw_event = container_of(work, - struct fw_event_work, work); + struct fw_event_work, delayed_work.work); unsigned long flags; struct MPT2SAS_ADAPTER *ioc = fw_event->ioc; /* the queue is being flushed so ignore this event */ - spin_lock_irqsave(&ioc->fw_event_lock, flags); - if (ioc->fw_events_off || ioc->remove_host) { - spin_unlock_irqrestore(&ioc->fw_event_lock, flags); + if (ioc->remove_host || fw_event->cancel_pending_work) { _scsih_fw_event_free(ioc, fw_event); return; } - spin_unlock_irqrestore(&ioc->fw_event_lock, flags); - if (ioc->shost_recovery) { - _scsih_fw_event_requeue(ioc, fw_event, 1000); + if (fw_event->event == MPT2SAS_RESCAN_AFTER_HOST_RESET) { + _scsih_fw_event_free(ioc, fw_event); + spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags); + if (ioc->shost_recovery) { + init_completion(&ioc->shost_recovery_done); + spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, + flags); + wait_for_completion(&ioc->shost_recovery_done); + } else + spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, + flags); + _scsih_search_responding_sas_devices(ioc); + _scsih_search_responding_raid_devices(ioc); + _scsih_search_responding_expanders(ioc); + _scsih_remove_unresponding_sas_devices(ioc); return; } @@ -5891,16 +5894,11 @@ mpt2sas_scsih_event_callback(struct MPT2SAS_ADAPTER *ioc, u8 msix_index, { struct fw_event_work *fw_event; Mpi2EventNotificationReply_t *mpi_reply; - unsigned long flags; u16 event; /* events turned off due to host reset or driver unloading */ - spin_lock_irqsave(&ioc->fw_event_lock, flags); - if (ioc->fw_events_off || ioc->remove_host) { - spin_unlock_irqrestore(&ioc->fw_event_lock, flags); + if (ioc->remove_host) return 1; - } - spin_unlock_irqrestore(&ioc->fw_event_lock, flags); mpi_reply = mpt2sas_base_get_reply_virt_addr(ioc, reply); event = le16_to_cpu(mpi_reply->Event); @@ -6158,6 +6156,18 @@ _scsih_shutdown(struct pci_dev *pdev) { struct Scsi_Host *shost = pci_get_drvdata(pdev); struct MPT2SAS_ADAPTER *ioc = shost_priv(shost); + struct workqueue_struct *wq; + unsigned long flags; + + ioc->remove_host = 1; + _scsih_fw_event_cleanup_queue(ioc); + + spin_lock_irqsave(&ioc->fw_event_lock, flags); + wq = ioc->firmware_event_thread; + ioc->firmware_event_thread = NULL; + spin_unlock_irqrestore(&ioc->fw_event_lock, flags); + if (wq) + destroy_workqueue(wq); _scsih_ir_shutdown(ioc); mpt2sas_base_detach(ioc); @@ -6184,7 +6194,7 @@ _scsih_remove(struct pci_dev *pdev) unsigned long flags; ioc->remove_host = 1; - _scsih_fw_event_off(ioc); + _scsih_fw_event_cleanup_queue(ioc); spin_lock_irqsave(&ioc->fw_event_lock, flags); wq = ioc->firmware_event_thread; -- cgit v1.2.2