diff options
Diffstat (limited to 'drivers/scsi')
-rw-r--r-- | drivers/scsi/isci/port.c | 45 | ||||
-rw-r--r-- | drivers/scsi/isci/port.h | 5 | ||||
-rw-r--r-- | drivers/scsi/isci/task.c | 235 |
3 files changed, 4 insertions, 281 deletions
diff --git a/drivers/scsi/isci/port.c b/drivers/scsi/isci/port.c index bfeb87905aaf..ac7f27749f97 100644 --- a/drivers/scsi/isci/port.c +++ b/drivers/scsi/isci/port.c @@ -145,48 +145,15 @@ static void sci_port_bcn_enable(struct isci_port *iport) } } -/* called under sci_lock to stabilize phy:port associations */ -void isci_port_bcn_enable(struct isci_host *ihost, struct isci_port *iport) -{ - int i; - - clear_bit(IPORT_BCN_BLOCKED, &iport->flags); - wake_up(&ihost->eventq); - - if (!test_and_clear_bit(IPORT_BCN_PENDING, &iport->flags)) - return; - - for (i = 0; i < ARRAY_SIZE(iport->phy_table); i++) { - struct isci_phy *iphy = iport->phy_table[i]; - - if (!iphy) - continue; - - ihost->sas_ha.notify_port_event(&iphy->sas_phy, - PORTE_BROADCAST_RCVD); - break; - } -} - static void isci_port_bc_change_received(struct isci_host *ihost, struct isci_port *iport, struct isci_phy *iphy) { - if (iport && test_bit(IPORT_BCN_BLOCKED, &iport->flags)) { - dev_dbg(&ihost->pdev->dev, - "%s: disabled BCN; isci_phy = %p, sas_phy = %p\n", - __func__, iphy, &iphy->sas_phy); - set_bit(IPORT_BCN_PENDING, &iport->flags); - atomic_inc(&iport->event); - wake_up(&ihost->eventq); - } else { - dev_dbg(&ihost->pdev->dev, - "%s: isci_phy = %p, sas_phy = %p\n", - __func__, iphy, &iphy->sas_phy); + dev_dbg(&ihost->pdev->dev, + "%s: isci_phy = %p, sas_phy = %p\n", + __func__, iphy, &iphy->sas_phy); - ihost->sas_ha.notify_port_event(&iphy->sas_phy, - PORTE_BROADCAST_RCVD); - } + ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD); sci_port_bcn_enable(iport); } @@ -278,9 +245,6 @@ static void isci_port_link_down(struct isci_host *isci_host, /* check to see if this is the last phy on this port. */ if (isci_phy->sas_phy.port && isci_phy->sas_phy.port->num_phys == 1) { - atomic_inc(&isci_port->event); - isci_port_bcn_enable(isci_host, isci_port); - /* change the state for all devices on this port. The * next task sent to this device will be returned as * SAS_TASK_UNDELIVERED, and the scsi mid layer will @@ -1672,7 +1636,6 @@ void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index) init_completion(&iport->start_complete); iport->isci_host = ihost; isci_port_change_state(iport, isci_freed); - atomic_set(&iport->event, 0); } /** diff --git a/drivers/scsi/isci/port.h b/drivers/scsi/isci/port.h index e84d22a309e3..cb5ffbc38603 100644 --- a/drivers/scsi/isci/port.h +++ b/drivers/scsi/isci/port.h @@ -77,7 +77,6 @@ enum isci_status { /** * struct isci_port - isci direct attached sas port object - * @event: counts bcns and port stop events (for bcn filtering) * @ready_exit: several states constitute 'ready'. When exiting ready we * need to take extra port-teardown actions that are * skipped when exiting to another 'ready' state. @@ -92,10 +91,6 @@ enum isci_status { */ struct isci_port { enum isci_status status; - #define IPORT_BCN_BLOCKED 0 - #define IPORT_BCN_PENDING 1 - unsigned long flags; - atomic_t event; struct isci_host *isci_host; struct asd_sas_port sas_port; struct list_head remote_dev_list; diff --git a/drivers/scsi/isci/task.c b/drivers/scsi/isci/task.c index 6d8ff15a03d1..66ad3dc89498 100644 --- a/drivers/scsi/isci/task.c +++ b/drivers/scsi/isci/task.c @@ -1331,226 +1331,10 @@ isci_task_request_complete(struct isci_host *ihost, complete(tmf_complete); } -static void isci_smp_task_timedout(unsigned long _task) -{ - struct sas_task *task = (void *) _task; - unsigned long flags; - - spin_lock_irqsave(&task->task_state_lock, flags); - if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) - task->task_state_flags |= SAS_TASK_STATE_ABORTED; - spin_unlock_irqrestore(&task->task_state_lock, flags); - - complete(&task->completion); -} - -static void isci_smp_task_done(struct sas_task *task) -{ - if (!del_timer(&task->timer)) - return; - complete(&task->completion); -} - -static int isci_smp_execute_task(struct isci_host *ihost, - struct domain_device *dev, void *req, - int req_size, void *resp, int resp_size) -{ - int res, retry; - struct sas_task *task = NULL; - - for (retry = 0; retry < 3; retry++) { - task = sas_alloc_task(GFP_KERNEL); - if (!task) - return -ENOMEM; - - task->dev = dev; - task->task_proto = dev->tproto; - sg_init_one(&task->smp_task.smp_req, req, req_size); - sg_init_one(&task->smp_task.smp_resp, resp, resp_size); - - task->task_done = isci_smp_task_done; - - task->timer.data = (unsigned long) task; - task->timer.function = isci_smp_task_timedout; - task->timer.expires = jiffies + 10*HZ; - add_timer(&task->timer); - - res = isci_task_execute_task(task, 1, GFP_KERNEL); - - if (res) { - del_timer(&task->timer); - dev_dbg(&ihost->pdev->dev, - "%s: executing SMP task failed:%d\n", - __func__, res); - goto ex_err; - } - - wait_for_completion(&task->completion); - res = -ECOMM; - if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { - dev_dbg(&ihost->pdev->dev, - "%s: smp task timed out or aborted\n", - __func__); - isci_task_abort_task(task); - if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { - dev_dbg(&ihost->pdev->dev, - "%s: SMP task aborted and not done\n", - __func__); - goto ex_err; - } - } - if (task->task_status.resp == SAS_TASK_COMPLETE && - task->task_status.stat == SAM_STAT_GOOD) { - res = 0; - break; - } - if (task->task_status.resp == SAS_TASK_COMPLETE && - task->task_status.stat == SAS_DATA_UNDERRUN) { - /* no error, but return the number of bytes of - * underrun */ - res = task->task_status.residual; - break; - } - if (task->task_status.resp == SAS_TASK_COMPLETE && - task->task_status.stat == SAS_DATA_OVERRUN) { - res = -EMSGSIZE; - break; - } else { - dev_dbg(&ihost->pdev->dev, - "%s: task to dev %016llx response: 0x%x " - "status 0x%x\n", __func__, - SAS_ADDR(dev->sas_addr), - task->task_status.resp, - task->task_status.stat); - sas_free_task(task); - task = NULL; - } - } -ex_err: - BUG_ON(retry == 3 && task != NULL); - sas_free_task(task); - return res; -} - -#define DISCOVER_REQ_SIZE 16 -#define DISCOVER_RESP_SIZE 56 - -int isci_smp_get_phy_attached_dev_type(struct isci_host *ihost, - struct domain_device *dev, - int phy_id, int *adt) -{ - struct smp_resp *disc_resp; - u8 *disc_req; - int res; - - disc_resp = kzalloc(DISCOVER_RESP_SIZE, GFP_KERNEL); - if (!disc_resp) - return -ENOMEM; - - disc_req = kzalloc(DISCOVER_REQ_SIZE, GFP_KERNEL); - if (disc_req) { - disc_req[0] = SMP_REQUEST; - disc_req[1] = SMP_DISCOVER; - disc_req[9] = phy_id; - } else { - kfree(disc_resp); - return -ENOMEM; - } - res = isci_smp_execute_task(ihost, dev, disc_req, DISCOVER_REQ_SIZE, - disc_resp, DISCOVER_RESP_SIZE); - if (!res) { - if (disc_resp->result != SMP_RESP_FUNC_ACC) - res = disc_resp->result; - else - *adt = disc_resp->disc.attached_dev_type; - } - kfree(disc_req); - kfree(disc_resp); - - return res; -} - -static void isci_wait_for_smp_phy_reset(struct isci_remote_device *idev, int phy_num) -{ - struct domain_device *dev = idev->domain_dev; - struct isci_port *iport = idev->isci_port; - struct isci_host *ihost = iport->isci_host; - int res, iteration = 0, attached_device_type; - #define STP_WAIT_MSECS 25000 - unsigned long tmo = msecs_to_jiffies(STP_WAIT_MSECS); - unsigned long deadline = jiffies + tmo; - enum { - SMP_PHYWAIT_PHYDOWN, - SMP_PHYWAIT_PHYUP, - SMP_PHYWAIT_DONE - } phy_state = SMP_PHYWAIT_PHYDOWN; - - /* While there is time, wait for the phy to go away and come back */ - while (time_is_after_jiffies(deadline) && phy_state != SMP_PHYWAIT_DONE) { - int event = atomic_read(&iport->event); - - ++iteration; - - tmo = wait_event_timeout(ihost->eventq, - event != atomic_read(&iport->event) || - !test_bit(IPORT_BCN_BLOCKED, &iport->flags), - tmo); - /* link down, stop polling */ - if (!test_bit(IPORT_BCN_BLOCKED, &iport->flags)) - break; - - dev_dbg(&ihost->pdev->dev, - "%s: iport %p, iteration %d," - " phase %d: time_remaining %lu, bcns = %d\n", - __func__, iport, iteration, phy_state, - tmo, test_bit(IPORT_BCN_PENDING, &iport->flags)); - - res = isci_smp_get_phy_attached_dev_type(ihost, dev, phy_num, - &attached_device_type); - tmo = deadline - jiffies; - - if (res) { - dev_dbg(&ihost->pdev->dev, - "%s: iteration %d, phase %d:" - " SMP error=%d, time_remaining=%lu\n", - __func__, iteration, phy_state, res, tmo); - break; - } - dev_dbg(&ihost->pdev->dev, - "%s: iport %p, iteration %d," - " phase %d: time_remaining %lu, bcns = %d, " - "attdevtype = %x\n", - __func__, iport, iteration, phy_state, - tmo, test_bit(IPORT_BCN_PENDING, &iport->flags), - attached_device_type); - - switch (phy_state) { - case SMP_PHYWAIT_PHYDOWN: - /* Has the device gone away? */ - if (!attached_device_type) - phy_state = SMP_PHYWAIT_PHYUP; - - break; - - case SMP_PHYWAIT_PHYUP: - /* Has the device come back? */ - if (attached_device_type) - phy_state = SMP_PHYWAIT_DONE; - break; - - case SMP_PHYWAIT_DONE: - break; - } - - } - dev_dbg(&ihost->pdev->dev, "%s: done\n", __func__); -} - static int isci_reset_device(struct isci_host *ihost, struct isci_remote_device *idev) { struct sas_phy *phy = sas_find_local_phy(idev->domain_dev); - struct isci_port *iport = idev->isci_port; enum sci_status status; unsigned long flags; int rc; @@ -1570,10 +1354,6 @@ static int isci_reset_device(struct isci_host *ihost, } spin_unlock_irqrestore(&ihost->scic_lock, flags); - /* If this is a device on an expander, disable BCN processing. */ - if (!scsi_is_sas_phy_local(phy)) - set_bit(IPORT_BCN_BLOCKED, &iport->flags); - rc = sas_phy_reset(phy, true); /* Terminate in-progress I/O now. */ @@ -1584,21 +1364,6 @@ static int isci_reset_device(struct isci_host *ihost, status = sci_remote_device_reset_complete(idev); spin_unlock_irqrestore(&ihost->scic_lock, flags); - /* If this is a device on an expander, bring the phy back up. */ - if (!scsi_is_sas_phy_local(phy)) { - /* A phy reset will cause the device to go away then reappear. - * Since libsas will take action on incoming BCNs (eg. remove - * a device going through an SMP phy-control driven reset), - * we need to wait until the phy comes back up before letting - * discovery proceed in libsas. - */ - isci_wait_for_smp_phy_reset(idev, phy->number); - - spin_lock_irqsave(&ihost->scic_lock, flags); - isci_port_bcn_enable(ihost, idev->isci_port); - spin_unlock_irqrestore(&ihost->scic_lock, flags); - } - if (status != SCI_SUCCESS) { dev_dbg(&ihost->pdev->dev, "%s: sci_remote_device_reset_complete(%p) " |