diff options
| -rw-r--r-- | Documentation/scsi/libsas.txt | 82 | ||||
| -rw-r--r-- | drivers/scsi/aic94xx/aic94xx.h | 2 | ||||
| -rw-r--r-- | drivers/scsi/aic94xx/aic94xx_hwi.c | 3 | ||||
| -rw-r--r-- | drivers/scsi/aic94xx/aic94xx_init.c | 11 | ||||
| -rw-r--r-- | drivers/scsi/aic94xx/aic94xx_task.c | 13 | ||||
| -rw-r--r-- | drivers/scsi/isci/init.c | 2 | ||||
| -rw-r--r-- | drivers/scsi/isci/task.c | 147 | ||||
| -rw-r--r-- | drivers/scsi/isci/task.h | 1 | ||||
| -rw-r--r-- | drivers/scsi/libsas/sas_ata.c | 9 | ||||
| -rw-r--r-- | drivers/scsi/libsas/sas_expander.c | 2 | ||||
| -rw-r--r-- | drivers/scsi/libsas/sas_init.c | 21 | ||||
| -rw-r--r-- | drivers/scsi/libsas/sas_internal.h | 2 | ||||
| -rw-r--r-- | drivers/scsi/libsas/sas_scsi_host.c | 176 | ||||
| -rw-r--r-- | drivers/scsi/mvsas/mv_init.c | 22 | ||||
| -rw-r--r-- | drivers/scsi/mvsas/mv_sas.c | 109 | ||||
| -rw-r--r-- | drivers/scsi/mvsas/mv_sas.h | 10 | ||||
| -rw-r--r-- | drivers/scsi/pm8001/pm8001_init.c | 2 | ||||
| -rw-r--r-- | drivers/scsi/pm8001/pm8001_sas.c | 22 | ||||
| -rw-r--r-- | drivers/scsi/pm8001/pm8001_sas.h | 3 | ||||
| -rw-r--r-- | include/scsi/libsas.h | 14 |
20 files changed, 97 insertions, 556 deletions
diff --git a/Documentation/scsi/libsas.txt b/Documentation/scsi/libsas.txt index 3cc9c7843e15..8cac6492aade 100644 --- a/Documentation/scsi/libsas.txt +++ b/Documentation/scsi/libsas.txt @@ -226,9 +226,6 @@ static int register_sas_ha(struct my_sas_ha *my_ha) my_ha->sas_ha.lldd_dev_found = my_dev_found; my_ha->sas_ha.lldd_dev_gone = my_dev_gone; - my_ha->sas_ha.lldd_max_execute_num = lldd_max_execute_num; (1) - - my_ha->sas_ha.lldd_queue_size = ha_can_queue; my_ha->sas_ha.lldd_execute_task = my_execute_task; my_ha->sas_ha.lldd_abort_task = my_abort_task; @@ -247,28 +244,6 @@ static int register_sas_ha(struct my_sas_ha *my_ha) return sas_register_ha(&my_ha->sas_ha); } -(1) This is normally a LLDD parameter, something of the -lines of a task collector. What it tells the SAS Layer is -whether the SAS layer should run in Direct Mode (default: -value 0 or 1) or Task Collector Mode (value greater than 1). - -In Direct Mode, the SAS Layer calls Execute Task as soon as -it has a command to send to the SDS, _and_ this is a single -command, i.e. not linked. - -Some hardware (e.g. aic94xx) has the capability to DMA more -than one task at a time (interrupt) from host memory. Task -Collector Mode is an optional feature for HAs which support -this in their hardware. (Again, it is completely optional -even if your hardware supports it.) - -In Task Collector Mode, the SAS Layer would do _natural_ -coalescing of tasks and at the appropriate moment it would -call your driver to DMA more than one task in a single HA -interrupt. DMBS may want to use this by insmod/modprobe -setting the lldd_max_execute_num to something greater than -1. - (2) SAS 1.1 does not define I_T Nexus Reset TMF. Events @@ -325,71 +300,22 @@ PHYE_SPINUP_HOLD -- SATA is present, COMWAKE not sent. The Execute Command SCSI RPC: - int (*lldd_execute_task)(struct sas_task *, int num, - unsigned long gfp_flags); + int (*lldd_execute_task)(struct sas_task *, gfp_t gfp_flags); -Used to queue a task to the SAS LLDD. @task is the tasks to -be executed. @num should be the number of tasks being -queued at this function call (they are linked listed via -task::list), @gfp_mask should be the gfp_mask defining the -context of the caller. +Used to queue a task to the SAS LLDD. @task is the task to be executed. +@gfp_mask is the gfp_mask defining the context of the caller. This function should implement the Execute Command SCSI RPC, -or if you're sending a SCSI Task as linked commands, you -should also use this function. -That is, when lldd_execute_task() is called, the command(s) +That is, when lldd_execute_task() is called, the command go out on the transport *immediately*. There is *no* queuing of any sort and at any level in a SAS LLDD. -The use of task::list is two-fold, one for linked commands, -the other discussed below. - -It is possible to queue up more than one task at a time, by -initializing the list element of struct sas_task, and -passing the number of tasks enlisted in this manner in num. - Returns: -SAS_QUEUE_FULL, -ENOMEM, nothing was queued; 0, the task(s) were queued. -If you want to pass num > 1, then either -A) you're the only caller of this function and keep track - of what you've queued to the LLDD, or -B) you know what you're doing and have a strategy of - retrying. - -As opposed to queuing one task at a time (function call), -batch queuing of tasks, by having num > 1, greatly -simplifies LLDD code, sequencer code, and _hardware design_, -and has some performance advantages in certain situations -(DBMS). - -The LLDD advertises if it can take more than one command at -a time at lldd_execute_task(), by setting the -lldd_max_execute_num parameter (controlled by "collector" -module parameter in aic94xx SAS LLDD). - -You should leave this to the default 1, unless you know what -you're doing. - -This is a function of the LLDD, to which the SAS layer can -cater to. - -int lldd_queue_size - The host adapter's queue size. This is the maximum -number of commands the lldd can have pending to domain -devices on behalf of all upper layers submitting through -lldd_execute_task(). - -You really want to set this to something (much) larger than -1. - -This _really_ has absolutely nothing to do with queuing. -There is no queuing in SAS LLDDs. - struct sas_task { dev -- the device this task is destined to - list -- must be initialized (INIT_LIST_HEAD) task_proto -- _one_ of enum sas_proto scatter -- pointer to scatter gather list array num_scatter -- number of elements in scatter diff --git a/drivers/scsi/aic94xx/aic94xx.h b/drivers/scsi/aic94xx/aic94xx.h index 66cda669b417..26d4ad9ede2e 100644 --- a/drivers/scsi/aic94xx/aic94xx.h +++ b/drivers/scsi/aic94xx/aic94xx.h @@ -78,7 +78,7 @@ void asd_dev_gone(struct domain_device *dev); void asd_invalidate_edb(struct asd_ascb *ascb, int edb_id); -int asd_execute_task(struct sas_task *, int num, gfp_t gfp_flags); +int asd_execute_task(struct sas_task *task, gfp_t gfp_flags); void asd_set_dmamode(struct domain_device *dev); diff --git a/drivers/scsi/aic94xx/aic94xx_hwi.c b/drivers/scsi/aic94xx/aic94xx_hwi.c index 4df867e07b20..9f636a34d595 100644 --- a/drivers/scsi/aic94xx/aic94xx_hwi.c +++ b/drivers/scsi/aic94xx/aic94xx_hwi.c @@ -1200,8 +1200,7 @@ static void asd_start_scb_timers(struct list_head *list) * Case A: we can send the whole batch at once. Increment "pending" * in the beginning of this function, when it is checked, in order to * eliminate races when this function is called by multiple processes. - * Case B: should never happen if the managing layer considers - * lldd_queue_size. + * Case B: should never happen. */ int asd_post_ascb_list(struct asd_ha_struct *asd_ha, struct asd_ascb *ascb, int num) diff --git a/drivers/scsi/aic94xx/aic94xx_init.c b/drivers/scsi/aic94xx/aic94xx_init.c index a64cf932d03d..14fc018436c2 100644 --- a/drivers/scsi/aic94xx/aic94xx_init.c +++ b/drivers/scsi/aic94xx/aic94xx_init.c @@ -49,14 +49,6 @@ MODULE_PARM_DESC(use_msi, "\n" "\tEnable(1) or disable(0) using PCI MSI.\n" "\tDefault: 0"); -static int lldd_max_execute_num = 0; -module_param_named(collector, lldd_max_execute_num, int, S_IRUGO); -MODULE_PARM_DESC(collector, "\n" - "\tIf greater than one, tells the SAS Layer to run in Task Collector\n" - "\tMode. If 1 or 0, tells the SAS Layer to run in Direct Mode.\n" - "\tThe aic94xx SAS LLDD supports both modes.\n" - "\tDefault: 0 (Direct Mode).\n"); - static struct scsi_transport_template *aic94xx_transport_template; static int asd_scan_finished(struct Scsi_Host *, unsigned long); static void asd_scan_start(struct Scsi_Host *); @@ -711,9 +703,6 @@ static int asd_register_sas_ha(struct asd_ha_struct *asd_ha) asd_ha->sas_ha.sas_port= sas_ports; asd_ha->sas_ha.num_phys= ASD_MAX_PHYS; - asd_ha->sas_ha.lldd_queue_size = asd_ha->seq.can_queue; - asd_ha->sas_ha.lldd_max_execute_num = lldd_max_execute_num; - return sas_register_ha(&asd_ha->sas_ha); } diff --git a/drivers/scsi/aic94xx/aic94xx_task.c b/drivers/scsi/aic94xx/aic94xx_task.c index 59b86e260ce9..5ff1ce7ba1f4 100644 --- a/drivers/scsi/aic94xx/aic94xx_task.c +++ b/drivers/scsi/aic94xx/aic94xx_task.c @@ -543,8 +543,7 @@ static int asd_can_queue(struct asd_ha_struct *asd_ha, int num) return res; } -int asd_execute_task(struct sas_task *task, const int num, - gfp_t gfp_flags) +int asd_execute_task(struct sas_task *task, gfp_t gfp_flags) { int res = 0; LIST_HEAD(alist); @@ -553,11 +552,11 @@ int asd_execute_task(struct sas_task *task, const int num, struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; unsigned long flags; - res = asd_can_queue(asd_ha, num); + res = asd_can_queue(asd_ha, 1); if (res) return res; - res = num; + res = 1; ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags); if (res) { res = -ENOMEM; @@ -568,7 +567,7 @@ int asd_execute_task(struct sas_task *task, const int num, list_for_each_entry(a, &alist, list) { a->uldd_task = t; t->lldd_task = a; - t = list_entry(t->list.next, struct sas_task, list); + break; } list_for_each_entry(a, &alist, list) { t = a->uldd_task; @@ -601,7 +600,7 @@ int asd_execute_task(struct sas_task *task, const int num, } list_del_init(&alist); - res = asd_post_ascb_list(asd_ha, ascb, num); + res = asd_post_ascb_list(asd_ha, ascb, 1); if (unlikely(res)) { a = NULL; __list_add(&alist, ascb->list.prev, &ascb->list); @@ -639,6 +638,6 @@ out_err_unmap: out_err: if (ascb) asd_ascb_free_list(ascb); - asd_can_dequeue(asd_ha, num); + asd_can_dequeue(asd_ha, 1); return res; } diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c index a81e546595dd..724c6265b667 100644 --- a/drivers/scsi/isci/init.c +++ b/drivers/scsi/isci/init.c @@ -260,8 +260,6 @@ static int isci_register_sas_ha(struct isci_host *isci_host) sas_ha->sas_port = sas_ports; sas_ha->num_phys = SCI_MAX_PHYS; - sas_ha->lldd_queue_size = ISCI_CAN_QUEUE_VAL; - sas_ha->lldd_max_execute_num = 1; sas_ha->strict_wide_ports = 1; sas_register_ha(sas_ha); diff --git a/drivers/scsi/isci/task.c b/drivers/scsi/isci/task.c index 5d6fda72d659..3f63c6318b0d 100644 --- a/drivers/scsi/isci/task.c +++ b/drivers/scsi/isci/task.c @@ -117,104 +117,97 @@ static inline int isci_device_io_ready(struct isci_remote_device *idev, * functions. This function is called by libsas to send a task down to * hardware. * @task: This parameter specifies the SAS task to send. - * @num: This parameter specifies the number of tasks to queue. * @gfp_flags: This parameter specifies the context of this call. * * status, zero indicates success. */ -int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags) +int isci_task_execute_task(struct sas_task *task, gfp_t gfp_flags) { struct isci_host *ihost = dev_to_ihost(task->dev); struct isci_remote_device *idev; unsigned long flags; + enum sci_status status = SCI_FAILURE; bool io_ready; u16 tag; - dev_dbg(&ihost->pdev->dev, "%s: num=%d\n", __func__, num); + spin_lock_irqsave(&ihost->scic_lock, flags); + idev = isci_lookup_device(task->dev); + io_ready = isci_device_io_ready(idev, task); + tag = isci_alloc_tag(ihost); + spin_unlock_irqrestore(&ihost->scic_lock, flags); - for_each_sas_task(num, task) { - enum sci_status status = SCI_FAILURE; + dev_dbg(&ihost->pdev->dev, + "task: %p, dev: %p idev: %p:%#lx cmd = %p\n", + task, task->dev, idev, idev ? idev->flags : 0, + task->uldd_task); - spin_lock_irqsave(&ihost->scic_lock, flags); - idev = isci_lookup_device(task->dev); - io_ready = isci_device_io_ready(idev, task); - tag = isci_alloc_tag(ihost); - spin_unlock_irqrestore(&ihost->scic_lock, flags); + if (!idev) { + isci_task_refuse(ihost, task, SAS_TASK_UNDELIVERED, + SAS_DEVICE_UNKNOWN); + } else if (!io_ready || tag == SCI_CONTROLLER_INVALID_IO_TAG) { + /* Indicate QUEUE_FULL so that the scsi midlayer + * retries. + */ + isci_task_refuse(ihost, task, SAS_TASK_COMPLETE, + SAS_QUEUE_FULL); + } else { + /* There is a device and it's ready for I/O. */ + spin_lock_irqsave(&task->task_state_lock, flags); - dev_dbg(&ihost->pdev->dev, - "task: %p, num: %d dev: %p idev: %p:%#lx cmd = %p\n", - task, num, task->dev, idev, idev ? idev->flags : 0, - task->uldd_task); - - if (!idev) { - isci_task_refuse(ihost, task, SAS_TASK_UNDELIVERED, - SAS_DEVICE_UNKNOWN); - } else if (!io_ready || tag == SCI_CONTROLLER_INVALID_IO_TAG) { - /* Indicate QUEUE_FULL so that the scsi midlayer - * retries. - */ - isci_task_refuse(ihost, task, SAS_TASK_COMPLETE, - SAS_QUEUE_FULL); + if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { + /* The I/O was aborted. */ + spin_unlock_irqrestore(&task->task_state_lock, flags); + + isci_task_refuse(ihost, task, + SAS_TASK_UNDELIVERED, + SAM_STAT_TASK_ABORTED); } else { - /* There is a device and it's ready for I/O. */ - spin_lock_irqsave(&task->task_state_lock, flags); - - if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { - /* The I/O was aborted. */ - spin_unlock_irqrestore(&task->task_state_lock, - flags); - - isci_task_refuse(ihost, task, - SAS_TASK_UNDELIVERED, - SAM_STAT_TASK_ABORTED); - } else { - task->task_state_flags |= SAS_TASK_AT_INITIATOR; + task->task_state_flags |= SAS_TASK_AT_INITIATOR; + spin_unlock_irqrestore(&task->task_state_lock, flags); + + /* build and send the request. */ + status = isci_request_execute(ihost, idev, task, tag); + + if (status != SCI_SUCCESS) { + spin_lock_irqsave(&task->task_state_lock, flags); + /* Did not really start this command. */ + task->task_state_flags &= ~SAS_TASK_AT_INITIATOR; spin_unlock_irqrestore(&task->task_state_lock, flags); - /* build and send the request. */ - status = isci_request_execute(ihost, idev, task, tag); - - if (status != SCI_SUCCESS) { - - spin_lock_irqsave(&task->task_state_lock, flags); - /* Did not really start this command. */ - task->task_state_flags &= ~SAS_TASK_AT_INITIATOR; - spin_unlock_irqrestore(&task->task_state_lock, flags); - - if (test_bit(IDEV_GONE, &idev->flags)) { - - /* Indicate that the device - * is gone. - */ - isci_task_refuse(ihost, task, - SAS_TASK_UNDELIVERED, - SAS_DEVICE_UNKNOWN); - } else { - /* Indicate QUEUE_FULL so that - * the scsi midlayer retries. - * If the request failed for - * remote device reasons, it - * gets returned as - * SAS_TASK_UNDELIVERED next - * time through. - */ - isci_task_refuse(ihost, task, - SAS_TASK_COMPLETE, - SAS_QUEUE_FULL); - } + if (test_bit(IDEV_GONE, &idev->flags)) { + /* Indicate that the device + * is gone. + */ + isci_task_refuse(ihost, task, + SAS_TASK_UNDELIVERED, + SAS_DEVICE_UNKNOWN); + } else { + /* Indicate QUEUE_FULL so that + * the scsi midlayer retries. + * If the request failed for + * remote device reasons, it + * gets returned as + * SAS_TASK_UNDELIVERED next + * time through. + */ + isci_task_refuse(ihost, task, + SAS_TASK_COMPLETE, + SAS_QUEUE_FULL); } } } - if (status != SCI_SUCCESS && tag != SCI_CONTROLLER_INVALID_IO_TAG) { - spin_lock_irqsave(&ihost->scic_lock, flags); - /* command never hit the device, so just free - * the tci and skip the sequence increment - */ - isci_tci_free(ihost, ISCI_TAG_TCI(tag)); - spin_unlock_irqrestore(&ihost->scic_lock, flags); - } - isci_put_device(idev); } + + if (status != SCI_SUCCESS && tag != SCI_CONTROLLER_INVALID_IO_TAG) { + spin_lock_irqsave(&ihost->scic_lock, flags); + /* command never hit the device, so just free + * the tci and skip the sequence increment + */ + isci_tci_free(ihost, ISCI_TAG_TCI(tag)); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + } + + isci_put_device(idev); return 0; } diff --git a/drivers/scsi/isci/task.h b/drivers/scsi/isci/task.h index 9c06cbad1d26..8f4531f22ac2 100644 --- a/drivers/scsi/isci/task.h +++ b/drivers/scsi/isci/task.h @@ -131,7 +131,6 @@ static inline void isci_print_tmf(struct isci_host *ihost, struct isci_tmf *tmf) int isci_task_execute_task( struct sas_task *task, - int num, gfp_t gfp_flags); int isci_task_abort_task( diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index 766098af4eb7..577770fdee86 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -171,7 +171,6 @@ static void sas_ata_task_done(struct sas_task *task) spin_unlock_irqrestore(ap->lock, flags); qc_already_gone: - list_del_init(&task->list); sas_free_task(task); } @@ -244,12 +243,7 @@ static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) if (qc->scsicmd) ASSIGN_SAS_TASK(qc->scsicmd, task); - if (sas_ha->lldd_max_execute_num < 2) - ret = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); - else - ret = sas_queue_up(task); - - /* Examine */ + ret = i->dft->lldd_execute_task(task, GFP_ATOMIC); if (ret) { SAS_DPRINTK("lldd_execute_task returned: %d\n", ret); @@ -485,7 +479,6 @@ static void sas_ata_internal_abort(struct sas_task *task) return; out: - list_del_init(&task->list); sas_free_task(task); } diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index 0cac7d8fd0f7..022bb6e10d98 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -96,7 +96,7 @@ static int smp_execute_task(struct domain_device *dev, void *req, int req_size, task->slow_task->timer.expires = jiffies + SMP_TIMEOUT*HZ; add_timer(&task->slow_task->timer); - res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); + res = i->dft->lldd_execute_task(task, GFP_KERNEL); if (res) { del_timer(&task->slow_task->timer); diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index dbc8a793fd86..362da44f2948 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -45,7 +45,6 @@ struct sas_task *sas_alloc_task(gfp_t flags) struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags); if (task) { - INIT_LIST_HEAD(&task->list); spin_lock_init(&task->task_state_lock); task->task_state_flags = SAS_TASK_STATE_PENDING; } @@ -77,7 +76,6 @@ EXPORT_SYMBOL_GPL(sas_alloc_slow_task); void sas_free_task(struct sas_task *task) { if (task) { - BUG_ON(!list_empty(&task->list)); kfree(task->slow_task); kmem_cache_free(sas_task_cache, task); } @@ -127,11 +125,6 @@ int sas_register_ha(struct sas_ha_struct *sas_ha) spin_lock_init(&sas_ha->phy_port_lock); sas_hash_addr(sas_ha->hashed_sas_addr, sas_ha->sas_addr); - if (sas_ha->lldd_queue_size == 0) - sas_ha->lldd_queue_size = 1; - else if (sas_ha->lldd_queue_size == -1) - sas_ha->lldd_queue_size = 128; /* Sanity */ - set_bit(SAS_HA_REGISTERED, &sas_ha->state); spin_lock_init(&sas_ha->lock); mutex_init(&sas_ha->drain_mutex); @@ -157,15 +150,6 @@ int sas_register_ha(struct sas_ha_struct *sas_ha) goto Undo_ports; } - if (sas_ha->lldd_max_execute_num > 1) { - error = sas_init_queue(sas_ha); - if (error) { - printk(KERN_NOTICE "couldn't start queue thread:%d, " - "running in direct mode\n", error); - sas_ha->lldd_max_execute_num = 1; - } - } - INIT_LIST_HEAD(&sas_ha->eh_done_q); INIT_LIST_HEAD(&sas_ha->eh_ata_q); @@ -201,11 +185,6 @@ int sas_unregister_ha(struct sas_ha_struct *sas_ha) __sas_drain_work(sas_ha); mutex_unlock(&sas_ha->drain_mutex); - if (sas_ha->lldd_max_execute_num > 1) { - sas_shutdown_queue(sas_ha); - sas_ha->lldd_max_execute_num = 1; - } - return 0; } diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 7e7ba83f0a21..9cf0bc260b0e 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -66,9 +66,7 @@ void sas_unregister_ports(struct sas_ha_struct *sas_ha); enum blk_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *); -int sas_init_queue(struct sas_ha_struct *sas_ha); int sas_init_events(struct sas_ha_struct *sas_ha); -void sas_shutdown_queue(struct sas_ha_struct *sas_ha); void sas_disable_revalidation(struct sas_ha_struct *ha); void sas_enable_revalidation(struct sas_ha_struct *ha); void __sas_drain_work(struct sas_ha_struct *ha); diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index b492293d51f2..72918d227ead 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -112,7 +112,6 @@ static void sas_end_task(struct scsi_cmnd *sc, struct sas_task *task) sc->result = (hs << 16) | stat; ASSIGN_SAS_TASK(sc, NULL); - list_del_init(&task->list); sas_free_task(task); } @@ -138,7 +137,6 @@ static void sas_scsi_task_done(struct sas_task *task) if (unlikely(!sc)) { SAS_DPRINTK("task_done called with non existing SCSI cmnd!\n"); - list_del_init(&task->list); sas_free_task(task); return; } @@ -179,31 +177,10 @@ static struct sas_task *sas_create_task(struct scsi_cmnd *cmd, return task; } -int sas_queue_up(struct sas_task *task) -{ - struct sas_ha_struct *sas_ha = task->dev->port->ha; - struct scsi_core *core = &sas_ha->core; - unsigned long flags; - LIST_HEAD(list); - - spin_lock_irqsave(&core->task_queue_lock, flags); - if (sas_ha->lldd_queue_size < core->task_queue_size + 1) { - spin_unlock_irqrestore(&core->task_queue_lock, flags); - return -SAS_QUEUE_FULL; - } - list_add_tail(&task->list, &core->task_queue); - core->task_queue_size += 1; - spin_unlock_irqrestore(&core->task_queue_lock, flags); - wake_up_process(core->queue_thread); - - return 0; -} - int sas_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) { struct sas_internal *i = to_sas_internal(host->transportt); struct domain_device *dev = cmd_to_domain_dev(cmd); - struct sas_ha_struct *sas_ha = dev->port->ha; struct sas_task *task; int res = 0; @@ -224,12 +201,7 @@ int sas_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) if (!task) return SCSI_MLQUEUE_HOST_BUSY; - /* Queue up, Direct Mode or Task Collector Mode. */ - if (sas_ha->lldd_max_execute_num < 2) - res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); - else - res = sas_queue_up(task); - + res = i->dft->lldd_execute_task(task, GFP_ATOMIC); if (res) goto out_free_task; return 0; @@ -323,37 +295,17 @@ enum task_disposition { TASK_IS_DONE, TASK_IS_ABORTED, TASK_IS_AT_LU, - TASK_IS_NOT_AT_HA, TASK_IS_NOT_AT_LU, TASK_ABORT_FAILED, }; static enum task_disposition sas_scsi_find_task(struct sas_task *task) { - struct sas_ha_struct *ha = task->dev->port->ha; unsigned long flags; int i, res; struct sas_internal *si = to_sas_internal(task->dev->port->ha->core.shost->transportt); - if (ha->lldd_max_execute_num > 1) { - struct scsi_core *core = &ha->core; - struct sas_task *t, *n; - - mutex_lock(&core->task_queue_flush); - spin_lock_irqsave(&core->task_queue_lock, flags); - list_for_each_entry_safe(t, n, &core->task_queue, list) - if (task == t) { - list_del_init(&t->list); - break; - } - spin_unlock_irqrestore(&core->task_queue_lock, flags); - mutex_unlock(&core->task_queue_flush); - - if (task == t) - return TASK_IS_NOT_AT_HA; - } - for (i = 0; i < 5; i++) { SAS_DPRINTK("%s: aborting task 0x%p\n", __func__, task); res = si->dft->lldd_abort_task(task); @@ -667,14 +619,6 @@ static void sas_eh_handle_sas_errors(struct Scsi_Host *shost, struct list_head * cmd->eh_eflags = 0; switch (res) { - case TASK_IS_NOT_AT_HA: - SAS_DPRINTK("%s: task 0x%p is not at ha: %s\n", - __func__, task, - cmd->retries ? "retry" : "aborted"); - if (cmd->retries) - cmd->retries--; - sas_eh_finish_cmd(cmd); - continue; case TASK_IS_DONE: SAS_DPRINTK("%s: task 0x%p is done\n", __func__, task); @@ -836,9 +780,6 @@ retry: scsi_eh_ready_devs(shost, &eh_work_q, &ha->eh_done_q); out: - if (ha->lldd_max_execute_num > 1) - wake_up_process(ha->core.queue_thread); - sas_eh_handle_resets(shost); /* now link into libata eh --- if we have any ata devices */ @@ -984,121 +925,6 @@ int sas_bios_param(struct scsi_device *scsi_dev, return 0; } -/* ---------- Task Collector Thread implementation ---------- */ - -static void sas_queue(struct sas_ha_struct *sas_ha) -{ - struct scsi_core *core = &sas_ha->core; - unsigned long flags; - LIST_HEAD(q); - int can_queue; - int res; - struct sas_internal *i = to_sas_internal(core->shost->transportt); - - mutex_lock(&core->task_queue_flush); - spin_lock_irqsave(&core->task_queue_lock, flags); - while (!kthread_should_stop() && - !list_empty(&core->task_queue) && - !test_bit(SAS_HA_FROZEN, &sas_ha->state)) { - - can_queue = sas_ha->lldd_queue_size - core->task_queue_size; - if (can_queue >= 0) { - can_queue = core->task_queue_size; - list_splice_init(&core->task_queue, &q); - } else { - struct list_head *a, *n; - - can_queue = sas_ha->lldd_queue_size; - list_for_each_safe(a, n, &core->task_queue) { - list_move_tail(a, &q); - if (--can_queue == 0) - break; - } - can_queue = sas_ha->lldd_queue_size; - } - core->task_queue_size -= can_queue; - spin_unlock_irqrestore(&core->task_queue_lock, flags); - { - struct sas_task *task = list_entry(q.next, - struct sas_task, - list); - list_del_init(&q); - res = i->dft->lldd_execute_task(task, can_queue, - GFP_KERNEL); - if (unlikely(res)) - __list_add(&q, task->list.prev, &task->list); - } - spin_lock_irqsave(&core->task_queue_lock, flags); - if (res) { - list_splice_init(&q, &core->task_queue); /*at head*/ - core->task_queue_size += can_queue; - } - } - spin_unlock_irqrestore(&core->task_queue_lock, flags); - mutex_unlock(&core->task_queue_flush); -} - -/** - * sas_queue_thread -- The Task Collector thread - * @_sas_ha: pointer to struct sas_ha - */ -static int sas_queue_thread(void *_sas_ha) -{ - struct sas_ha_struct *sas_ha = _sas_ha; - - while (1) { - set_current_state(TASK_INTERRUPTIBLE); - schedule(); - sas_queue(sas_ha); - if (kthread_should_stop()) - break; - } - - return 0; -} - -int sas_init_queue(struct sas_ha_struct *sas_ha) -{ - struct scsi_core *core = &sas_ha->core; - - spin_lock_init(&core->task_queue_lock); - mutex_init(&core->task_queue_flush); - core->task_queue_size = 0; - INIT_LIST_HEAD(&core->task_queue); - - core->queue_thread = kthread_run(sas_queue_thread, sas_ha, - "sas_queue_%d", core->shost->host_no); - if (IS_ERR(core->queue_thread)) - return PTR_ERR(core->queue_thread); - return 0; -} - -void sas_shutdown_queue(struct sas_ha_struct *sas_ha) -{ - unsigned long flags; - struct scsi_core *core = &sas_ha->core; - struct sas_task *task, *n; - - kthread_stop(core->queue_thread); - - if (!list_empty(&core->task_queue)) - SAS_DPRINTK("HA: %llx: scsi core task queue is NOT empty!?\n", - SAS_ADDR(sas_ha->sas_addr)); - - spin_lock_irqsave(&core->task_queue_lock, flags); - list_for_each_entry_safe(task, n, &core->task_queue, list) { - struct scsi_cmnd *cmd = task->uldd_task; - - list_del_init(&task->list); - - ASSIGN_SAS_TASK(cmd, NULL); - sas_free_task(task); - cmd->result = DID_ABORT << 16; - cmd->scsi_done(cmd); - } - spin_unlock_irqrestore(&core->task_queue_lock, flags); -} - /* * Tell an upper layer that it needs to initiate an abort for a given task. * This should only ever be called by an LLDD. diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c index ac7c03078409..f15df3de6790 100644 --- a/drivers/scsi/mvsas/mv_init.c +++ b/drivers/scsi/mvsas/mv_init.c @@ -26,18 +26,9 @@ #include "mv_sas.h" -static int lldd_max_execute_num = 1; -module_param_named(collector, lldd_max_execute_num, int, S_IRUGO); -MODULE_PARM_DESC(collector, "\n" - "\tIf greater than one, tells the SAS Layer to run in Task Collector\n" - "\tMode. If 1 or 0, tells the SAS Layer to run in Direct Mode.\n" - "\tThe mvsas SAS LLDD supports both modes.\n" - "\tDefault: 1 (Direct Mode).\n"); - int interrupt_coalescing = 0x80; static struct scsi_transport_template *mvs_stt; -struct kmem_cache *mvs_task_list_cache; static const struct mvs_chip_info mvs_chips[] = { [chip_6320] = { 1, 2, 0x400, 17, 16, 6, 9, &mvs_64xx_dispatch, }, [chip_6440] = { 1, 4, 0x400, 17, 16, 6, 9, &mvs_64xx_dispatch, }, @@ -513,14 +504,11 @@ static void mvs_post_sas_ha_init(struct Scsi_Host *shost, sha->num_phys = nr_core * chip_info->n_phy; - sha->lldd_max_execute_num = lldd_max_execute_num; - if (mvi->flags & MVF_FLAG_SOC) can_queue = MVS_SOC_CAN_QUEUE; else can_queue = MVS_CHIP_SLOT_SZ; - sha->lldd_queue_size = can_queue; shost->sg_tablesize = min_t(u16, SG_ALL, MVS_MAX_SG); shost->can_queue = can_queue; mvi->shost->cmd_per_lun = MVS_QUEUE_SIZE; @@ -833,16 +821,7 @@ static int __init mvs_init(void) if (!mvs_stt) return -ENOMEM; - mvs_task_list_cache = kmem_cache_create("mvs_task_list", sizeof(struct mvs_task_list), - 0, SLAB_HWCACHE_ALIGN, NULL); - if (!mvs_task_list_cache) { - rc = -ENOMEM; - mv_printk("%s: mvs_task_list_cache alloc failed! \n", __func__); - goto err_out; - } - rc = pci_register_driver(&mvs_pci_driver); - if (rc) goto err_out; @@ -857,7 +836,6 @@ static void __exit mvs_exit(void) { pci_unregister_driver(&mvs_pci_driver); sas_release_transport(mvs_stt); - kmem_cache_destroy(mvs_task_list_cache); } struct device_attribute *mvst_host_attrs[] = { diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c index ac52f7c99513..85d86a5cdb60 100644 --- a/drivers/scsi/mvsas/mv_sas.c +++ b/drivers/scsi/mvsas/mv_sas.c @@ -852,43 +852,7 @@ prep_out: return rc; } -static struct mvs_task_list *mvs_task_alloc_list(int *num, gfp_t gfp_flags) -{ - struct mvs_task_list *first = NULL; - - for (; *num > 0; --*num) { - struct mvs_task_list *mvs_list = kmem_cache_zalloc(mvs_task_list_cache, gfp_flags); - - if (!mvs_list) - break; - - INIT_LIST_HEAD(&mvs_list->list); - if (!first) - first = mvs_list; - else - list_add_tail(&mvs_list->list, &first->list); - - } - - return first; -} - -static inline void mvs_task_free_list(struct mvs_task_list *mvs_list) -{ - LIST_HEAD(list); - struct list_head *pos, *a; - struct mvs_task_list *mlist = NULL; - - __list_add(&list, mvs_list->list.prev, &mvs_list->list); - - list_for_each_safe(pos, a, &list) { - list_del_init(pos); - mlist = list_entry(pos, struct mvs_task_list, list); - kmem_cache_free(mvs_task_list_cache, mlist); - } -} - -static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags, +static int mvs_task_exec(struct sas_task *task, gfp_t gfp_flags, struct completion *completion, int is_tmf, struct mvs_tmf_task *tmf) { @@ -912,74 +876,9 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags, return rc; } -static int mvs_collector_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags, - struct completion *completion, int is_tmf, - struct mvs_tmf_task *tmf) +int mvs_queue_command(struct sas_task *task, gfp_t gfp_flags) { - struct domain_device *dev = task->dev; - struct mvs_prv_info *mpi = dev->port->ha->lldd_ha; - struct mvs_info *mvi = NULL; - struct sas_task *t = task; - struct mvs_task_list *mvs_list = NULL, *a; - LIST_HEAD(q); - int pass[2] = {0}; - u32 rc = 0; - u32 n = num; - unsigned long flags = 0; - - mvs_list = mvs_task_alloc_list(&n, gfp_flags); - if (n) { - printk(KERN_ERR "%s: mvs alloc list failed.\n", __func__); - rc = -ENOMEM; - goto free_list; - } - - __list_add(&q, mvs_list->list.prev, &mvs_list->list); - - list_for_each_entry(a, &q, list) { - a->task = t; - t = list_entry(t->list.next, struct sas_task, list); - } - - list_for_each_entry(a, &q , list) { - - t = a->task; - mvi = ((struct mvs_device *)t->dev->lldd_dev)->mvi_info; - - spin_lock_irqsave(&mvi->lock, flags); - rc = mvs_task_prep(t, mvi, is_tmf, tmf, &pass[mvi->id]); - if (rc) - dev_printk(KERN_ERR, mvi->dev, "mvsas exec failed[%d]!\n", rc); - spin_unlock_irqrestore(&mvi->lock, flags); - } - - if (likely(pass[0])) - MVS_CHIP_DISP->start_delivery(mpi->mvi[0], - (mpi->mvi[0]->tx_prod - 1) & (MVS_CHIP_SLOT_SZ - 1)); - - if (likely(pass[1])) - MVS_CHIP_DISP->start_delivery(mpi->mvi[1], - (mpi->mvi[1]->tx_prod - 1) & (MVS_CHIP_SLOT_SZ - 1)); - - list_del_init(&q); - -free_list: - if (mvs_list) - mvs_task_free_list(mvs_list); - - return rc; -} - -int mvs_queue_command(struct sas_task *task, const int num, - gfp_t gfp_flags) -{ - struct mvs_device *mvi_dev = task->dev->lldd_dev; - struct sas_ha_struct *sas = mvi_dev->mvi_info->sas; - - if (sas->lldd_max_execute_num < 2) - return mvs_task_exec(task, num, gfp_flags, NULL, 0, NULL); - else - return mvs_collector_task_exec(task, num, gfp_flags, NULL, 0, NULL); + return mvs_task_exec(task, gfp_flags, NULL, 0, NULL); } static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc) @@ -1411,7 +1310,7 @@ static int mvs_exec_internal_tmf_task(struct domain_device *dev, task->slow_task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ; add_timer(&task->slow_task->timer); - res = mvs_task_exec(task, 1, GFP_KERNEL, NULL, 1, tmf); + res = mvs_task_exec(task, GFP_KERNEL, NULL, 1, tmf); if (res) { del_timer(&task->slow_task->timer); diff --git a/drivers/scsi/mvsas/mv_sas.h b/drivers/scsi/mvsas/mv_sas.h index d6b19dc80bee..dc409c04747a 100644 --- a/drivers/scsi/mvsas/mv_sas.h +++ b/drivers/scsi/mvsas/mv_sas.h @@ -65,7 +65,6 @@ extern struct mvs_tgt_initiator mvs_tgt; extern struct mvs_info *tgt_mvi; extern const struct mvs_dispatch mvs_64xx_dispatch; extern const struct mvs_dispatch mvs_94xx_dispatch; -extern struct kmem_cache *mvs_task_list_cache; #define DEV_IS_EXPANDER(type) \ ((type == SAS_EDGE_EXPANDER_DEVICE) || (type == SAS_FANOUT_EXPANDER_DEVICE)) @@ -440,12 +439,6 @@ struct mvs_task_exec_info { int n_elem; }; -struct mvs_task_list { - struct sas_task *task; - struct list_head list; -}; - - /******************** function prototype *********************/ void mvs_get_sas_addr(void *buf, u32 buflen); void mvs_tag_clear(struct mvs_info *mvi, u32 tag); @@ -462,8 +455,7 @@ void mvs_set_sas_addr(struct mvs_info *mvi, int port_id, u32 off_lo, u32 off_hi, u64 sas_addr); void mvs_scan_start(struct Scsi_Host *shost); int mvs_scan_finished(struct Scsi_Host *shost, unsigned long time); -int mvs_queue_command(struct sas_task *task, const int num, - gfp_t gfp_flags); +int mvs_queue_command(struct sas_task *task, gfp_t gfp_flags); int mvs_abort_task(struct sas_task *task); int mvs_abort_task_set(struct domain_device *dev, u8 *lun); int mvs_clear_aca(struct domain_device *dev, u8 *lun); diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c index 19ae6cab5e44..329aba0083ab 100644 --- a/drivers/scsi/pm8001/pm8001_init.c +++ b/drivers/scsi/pm8001/pm8001_init.c @@ -601,8 +601,6 @@ static void pm8001_post_sas_ha_init(struct Scsi_Host *shost, sha->lldd_module = THIS_MODULE; sha->sas_addr = &pm8001_ha->sas_addr[0]; sha->num_phys = chip_info->n_phy; - sha->lldd_max_execute_num = 1; - sha->lldd_queue_size = PM8001_CAN_QUEUE; sha->core.shost = shost; } diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c index 76570e6a547d..b93f289b42b3 100644 --- a/drivers/scsi/pm8001/pm8001_sas.c +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -350,7 +350,7 @@ static int sas_find_local_port_id(struct domain_device *dev) */ #define DEV_IS_GONE(pm8001_dev) \ ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))) -static int pm8001_task_exec(struct sas_task *task, const int num, +static int pm8001_task_exec(struct sas_task *task, gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf) { struct domain_device *dev = task->dev; @@ -360,7 +360,6 @@ static int pm8001_task_exec(struct sas_task *task, const int num, struct sas_task *t = task; struct pm8001_ccb_info *ccb; u32 tag = 0xdeadbeef, rc, n_elem = 0; - u32 n = num; unsigned long flags = 0; if (!dev->port) { @@ -387,18 +386,12 @@ static int pm8001_task_exec(struct sas_task *task, const int num, spin_unlock_irqrestore(&pm8001_ha->lock, flags); t->task_done(t); spin_lock_irqsave(&pm8001_ha->lock, flags); - if (n > 1) - t = list_entry(t->list.next, - struct sas_task, list); continue; } else { struct task_status_struct *ts = &t->task_status; ts->resp = SAS_TASK_UNDELIVERED; ts->stat = SAS_PHY_DOWN; t->task_done(t); - if (n > 1) - t = list_entry(t->list.next, - struct sas_task, list); continue; } } @@ -460,9 +453,7 @@ static int pm8001_task_exec(struct sas_task *task, const int num, t->task_state_flags |= SAS_TASK_AT_INITIATOR; spin_unlock(&t->task_state_lock); pm8001_dev->running_req++; - if (n > 1) - t = list_entry(t->list.next, struct sas_task, list); - } while (--n); + } while (0); rc = 0; goto out_done; @@ -483,14 +474,11 @@ out_done: * pm8001_queue_command - register for upper layer used, all IO commands sent * to HBA are from this interface. * @task: the task to be execute. - * @num: if can_queue great than 1, the task can be queued up. for SMP task, - * we always execute one one time * @gfp_flags: gfp_flags */ -int pm8001_queue_command(struct sas_task *task, const int num, - gfp_t gfp_flags) +int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags) { - return pm8001_task_exec(task, num, gfp_flags, 0, NULL); + return pm8001_task_exec(task, gfp_flags, 0, NULL); } /** @@ -708,7 +696,7 @@ static int pm8001_exec_internal_tmf_task(struct domain_device *dev, task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ; add_timer(&task->slow_task->timer); - res = pm8001_task_exec(task, 1, GFP_KERNEL, 1, tmf); + res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf); if (res) { del_timer(&task->slow_task->timer); diff --git a/drivers/scsi/pm8001/pm8001_sas.h b/drivers/scsi/pm8001/pm8001_sas.h index f6b2ac59dae4..8dd8b7840f04 100644 --- a/drivers/scsi/pm8001/pm8001_sas.h +++ b/drivers/scsi/pm8001/pm8001_sas.h @@ -623,8 +623,7 @@ int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func, void *funcdata); void pm8001_scan_start(struct Scsi_Host *shost); int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time); -int pm8001_queue_command(struct sas_task *task, const int num, - gfp_t gfp_flags); +int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags); int pm8001_abort_task(struct sas_task *task); int pm8001_abort_task_set(struct domain_device *dev, u8 *lun); int pm8001_clear_aca(struct domain_device *dev, u8 *lun); diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 1f8b33ec612f..832dcc9f86ec 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -365,12 +365,6 @@ struct asd_sas_phy { struct scsi_core { struct Scsi_Host *shost; - struct mutex task_queue_flush; - spinlock_t task_queue_lock; - struct list_head task_queue; - int task_queue_size; - - struct task_struct *queue_thread; }; struct sas_ha_event { @@ -422,9 +416,6 @@ struct sas_ha_struct { struct asd_sas_port **sas_port; /* array of valid pointers, must be set */ int num_phys; /* must be set, gt 0, static */ - /* The class calls this to send a task for execution. */ - int lldd_max_execute_num; - int lldd_queue_size; int strict_wide_ports; /* both sas_addr and attached_sas_addr must match * their siblings when forming wide ports */ @@ -612,7 +603,6 @@ struct sas_ssp_task { struct sas_task { struct domain_device *dev; - struct list_head list; spinlock_t task_state_lock; unsigned task_state_flags; @@ -665,8 +655,7 @@ struct sas_domain_function_template { int (*lldd_dev_found)(struct domain_device *); void (*lldd_dev_gone)(struct domain_device *); - int (*lldd_execute_task)(struct sas_task *, int num, - gfp_t gfp_flags); + int (*lldd_execute_task)(struct sas_task *, gfp_t gfp_flags); /* Task Management Functions. Must be called from process context. */ int (*lldd_abort_task)(struct sas_task *); @@ -700,7 +689,6 @@ extern void sas_suspend_ha(struct sas_ha_struct *sas_ha); int sas_set_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates); int sas_phy_reset(struct sas_phy *phy, int hard_reset); -int sas_queue_up(struct sas_task *task); extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *); extern int sas_target_alloc(struct scsi_target *); extern int sas_slave_configure(struct scsi_device *); |