diff options
author | Len Brown <len.brown@intel.com> | 2006-01-07 03:50:18 -0500 |
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committer | Len Brown <len.brown@intel.com> | 2006-01-07 03:50:18 -0500 |
commit | ed03f430cdc8c802652467e9097606fedc2c7abc (patch) | |
tree | 30941ec1e6f93e99358fefe18175e5dd800a4379 /drivers/scsi/lpfc/lpfc_scsi.c | |
parent | ed349a8a0a780ed27e2a765f16cee54d9b63bfee (diff) | |
parent | 6f957eaf79356a32e838f5f262ee9a60544b1d5b (diff) | |
download | op-kernel-dev-ed03f430cdc8c802652467e9097606fedc2c7abc.zip op-kernel-dev-ed03f430cdc8c802652467e9097606fedc2c7abc.tar.gz |
Pull pnpacpi into acpica branch
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_scsi.c')
-rw-r--r-- | drivers/scsi/lpfc/lpfc_scsi.c | 295 |
1 files changed, 207 insertions, 88 deletions
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index c63275e..9ee8218 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -41,6 +41,20 @@ #define LPFC_ABORT_WAIT 2 +static inline void +lpfc_block_requests(struct lpfc_hba * phba) +{ + down(&phba->hba_can_block); + scsi_block_requests(phba->host); +} + +static inline void +lpfc_unblock_requests(struct lpfc_hba * phba) +{ + scsi_unblock_requests(phba->host); + up(&phba->hba_can_block); +} + /* * This routine allocates a scsi buffer, which contains all the necessary * information needed to initiate a SCSI I/O. The non-DMAable buffer region @@ -137,18 +151,22 @@ lpfc_new_scsi_buf(struct lpfc_hba * phba) } struct lpfc_scsi_buf* -lpfc_sli_get_scsi_buf(struct lpfc_hba * phba) +lpfc_get_scsi_buf(struct lpfc_hba * phba) { struct lpfc_scsi_buf * lpfc_cmd = NULL; struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; + unsigned long iflag = 0; + spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); + spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); return lpfc_cmd; } static void lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb) { + unsigned long iflag = 0; /* * There are only two special cases to consider. (1) the scsi command * requested scatter-gather usage or (2) the scsi command allocated @@ -166,8 +184,10 @@ lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb) } } + spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); psb->pCmd = NULL; list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); + spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); } static int @@ -389,7 +409,9 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, struct lpfc_rport_data *rdata = lpfc_cmd->rdata; struct lpfc_nodelist *pnode = rdata->pnode; struct scsi_cmnd *cmd = lpfc_cmd->pCmd; - unsigned long iflag; + int result; + struct scsi_device *sdev, *tmp_sdev; + int depth = 0; lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4]; lpfc_cmd->status = pIocbOut->iocb.ulpStatus; @@ -441,11 +463,64 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, *lp, *(lp + 3), cmd->retries, cmd->resid); } + result = cmd->result; + sdev = cmd->device; cmd->scsi_done(cmd); - spin_lock_irqsave(phba->host->host_lock, iflag); + if (!result && + ((jiffies - pnode->last_ramp_up_time) > + LPFC_Q_RAMP_UP_INTERVAL * HZ) && + ((jiffies - pnode->last_q_full_time) > + LPFC_Q_RAMP_UP_INTERVAL * HZ) && + (phba->cfg_lun_queue_depth > sdev->queue_depth)) { + shost_for_each_device(tmp_sdev, sdev->host) { + if (phba->cfg_lun_queue_depth > tmp_sdev->queue_depth) { + if (tmp_sdev->id != sdev->id) + continue; + if (tmp_sdev->ordered_tags) + scsi_adjust_queue_depth(tmp_sdev, + MSG_ORDERED_TAG, + tmp_sdev->queue_depth+1); + else + scsi_adjust_queue_depth(tmp_sdev, + MSG_SIMPLE_TAG, + tmp_sdev->queue_depth+1); + + pnode->last_ramp_up_time = jiffies; + } + } + } + + /* + * Check for queue full. If the lun is reporting queue full, then + * back off the lun queue depth to prevent target overloads. + */ + if (result == SAM_STAT_TASK_SET_FULL) { + pnode->last_q_full_time = jiffies; + + shost_for_each_device(tmp_sdev, sdev->host) { + if (tmp_sdev->id != sdev->id) + continue; + depth = scsi_track_queue_full(tmp_sdev, + tmp_sdev->queue_depth - 1); + } + /* + * The queue depth cannot be lowered any more. + * Modify the returned error code to store + * the final depth value set by + * scsi_track_queue_full. + */ + if (depth == -1) + depth = sdev->host->cmd_per_lun; + + if (depth) { + lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, + "%d:0711 detected queue full - lun queue depth " + " adjusted to %d.\n", phba->brd_no, depth); + } + } + lpfc_release_scsi_buf(phba, lpfc_cmd); - spin_unlock_irqrestore(phba->host->host_lock, iflag); } static void @@ -693,6 +768,37 @@ lpfc_info(struct Scsi_Host *host) return lpfcinfobuf; } +static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) +{ + unsigned long poll_tmo_expires = + (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo)); + + if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt) + mod_timer(&phba->fcp_poll_timer, + poll_tmo_expires); +} + +void lpfc_poll_start_timer(struct lpfc_hba * phba) +{ + lpfc_poll_rearm_timer(phba); +} + +void lpfc_poll_timeout(unsigned long ptr) +{ + struct lpfc_hba *phba = (struct lpfc_hba *)ptr; + unsigned long iflag; + + spin_lock_irqsave(phba->host->host_lock, iflag); + + if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { + lpfc_sli_poll_fcp_ring (phba); + if (phba->cfg_poll & DISABLE_FCP_RING_INT) + lpfc_poll_rearm_timer(phba); + } + + spin_unlock_irqrestore(phba->host->host_lock, iflag); +} + static int lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) { @@ -719,10 +825,11 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) cmnd->result = ScsiResult(DID_BUS_BUSY, 0); goto out_fail_command; } - lpfc_cmd = lpfc_sli_get_scsi_buf (phba); + lpfc_cmd = lpfc_get_scsi_buf (phba); if (lpfc_cmd == NULL) { - printk(KERN_WARNING "%s: No buffer available - list empty, " - "total count %d\n", __FUNCTION__, phba->total_scsi_bufs); + lpfc_printf_log(phba, KERN_INFO, LOG_FCP, + "%d:0707 driver's buffer pool is empty, " + "IO busied\n", phba->brd_no); goto out_host_busy; } @@ -746,11 +853,17 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); if (err) goto out_host_busy_free_buf; + + if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { + lpfc_sli_poll_fcp_ring(phba); + if (phba->cfg_poll & DISABLE_FCP_RING_INT) + lpfc_poll_rearm_timer(phba); + } + return 0; out_host_busy_free_buf: lpfc_release_scsi_buf(phba, lpfc_cmd); - cmnd->host_scribble = NULL; out_host_busy: return SCSI_MLQUEUE_HOST_BUSY; @@ -759,11 +872,12 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) return 0; } + static int -__lpfc_abort_handler(struct scsi_cmnd *cmnd) +lpfc_abort_handler(struct scsi_cmnd *cmnd) { - struct lpfc_hba *phba = - (struct lpfc_hba *)cmnd->device->host->hostdata[0]; + struct Scsi_Host *shost = cmnd->device->host; + struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0]; struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring]; struct lpfc_iocbq *iocb; struct lpfc_iocbq *abtsiocb; @@ -772,6 +886,8 @@ __lpfc_abort_handler(struct scsi_cmnd *cmnd) unsigned int loop_count = 0; int ret = SUCCESS; + lpfc_block_requests(phba); + spin_lock_irq(shost->host_lock); lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; BUG_ON(!lpfc_cmd); @@ -821,9 +937,15 @@ __lpfc_abort_handler(struct scsi_cmnd *cmnd) goto out; } + if (phba->cfg_poll & DISABLE_FCP_RING_INT) + lpfc_sli_poll_fcp_ring (phba); + /* Wait for abort to complete */ while (lpfc_cmd->pCmd == cmnd) { + if (phba->cfg_poll & DISABLE_FCP_RING_INT) + lpfc_sli_poll_fcp_ring (phba); + spin_unlock_irq(phba->host->host_lock); schedule_timeout_uninterruptible(LPFC_ABORT_WAIT*HZ); spin_lock_irq(phba->host->host_lock); @@ -844,26 +966,19 @@ __lpfc_abort_handler(struct scsi_cmnd *cmnd) out: lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, - "%d:0749 SCSI layer issued abort device: ret %#x, " - "ID %d, LUN %d, snum %#lx\n", + "%d:0749 SCSI Layer I/O Abort Request " + "Status x%x ID %d LUN %d snum %#lx\n", phba->brd_no, ret, cmnd->device->id, cmnd->device->lun, cmnd->serial_number); - return ret; -} + spin_unlock_irq(shost->host_lock); + lpfc_unblock_requests(phba); -static int -lpfc_abort_handler(struct scsi_cmnd *cmnd) -{ - int rc; - spin_lock_irq(cmnd->device->host->host_lock); - rc = __lpfc_abort_handler(cmnd); - spin_unlock_irq(cmnd->device->host->host_lock); - return rc; + return ret; } static int -__lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) +lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) { struct Scsi_Host *shost = cmnd->device->host; struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0]; @@ -871,9 +986,12 @@ __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) struct lpfc_iocbq *iocbq, *iocbqrsp; struct lpfc_rport_data *rdata = cmnd->device->hostdata; struct lpfc_nodelist *pnode = rdata->pnode; + uint32_t cmd_result = 0, cmd_status = 0; int ret = FAILED; int cnt, loopcnt; + lpfc_block_requests(phba); + spin_lock_irq(shost->host_lock); /* * If target is not in a MAPPED state, delay the reset until * target is rediscovered or nodev timeout expires. @@ -891,7 +1009,7 @@ __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) break; } - lpfc_cmd = lpfc_sli_get_scsi_buf (phba); + lpfc_cmd = lpfc_get_scsi_buf (phba); if (lpfc_cmd == NULL) goto out; @@ -916,26 +1034,28 @@ __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) if (ret == IOCB_SUCCESS) ret = SUCCESS; - lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4]; - lpfc_cmd->status = iocbqrsp->iocb.ulpStatus; - if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT) - if (lpfc_cmd->result & IOERR_DRVR_MASK) - lpfc_cmd->status = IOSTAT_DRIVER_REJECT; + + cmd_result = iocbqrsp->iocb.un.ulpWord[4]; + cmd_status = iocbqrsp->iocb.ulpStatus; + + lpfc_sli_release_iocbq(phba, iocbqrsp); + lpfc_release_scsi_buf(phba, lpfc_cmd); /* - * All outstanding txcmplq I/Os should have been aborted by the target. + * All outstanding txcmplq I/Os should have been aborted by the device. * Unfortunately, some targets do not abide by this forcing the driver * to double check. */ - lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], - cmnd->device->id, cmnd->device->lun, 0, - LPFC_CTX_LUN); - + cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], + cmnd->device->id, cmnd->device->lun, + LPFC_CTX_LUN); + if (cnt) + lpfc_sli_abort_iocb(phba, + &phba->sli.ring[phba->sli.fcp_ring], + cmnd->device->id, cmnd->device->lun, + 0, LPFC_CTX_LUN); loopcnt = 0; - while((cnt = lpfc_sli_sum_iocb(phba, - &phba->sli.ring[phba->sli.fcp_ring], - cmnd->device->id, cmnd->device->lun, - LPFC_CTX_LUN))) { + while(cnt) { spin_unlock_irq(phba->host->host_lock); schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ); spin_lock_irq(phba->host->host_lock); @@ -943,6 +1063,11 @@ __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) if (++loopcnt > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT) break; + + cnt = lpfc_sli_sum_iocb(phba, + &phba->sli.ring[phba->sli.fcp_ring], + cmnd->device->id, cmnd->device->lun, + LPFC_CTX_LUN); } if (cnt) { @@ -952,35 +1077,21 @@ __lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) ret = FAILED; } - lpfc_sli_release_iocbq(phba, iocbqrsp); - out_free_scsi_buf: lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "%d:0713 SCSI layer issued LUN reset (%d, %d) " "Data: x%x x%x x%x\n", - phba->brd_no, lpfc_cmd->pCmd->device->id, - lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status, - lpfc_cmd->result); - lpfc_release_scsi_buf(phba, lpfc_cmd); + phba->brd_no, cmnd->device->id,cmnd->device->lun, + ret, cmd_status, cmd_result); + out: + spin_unlock_irq(shost->host_lock); + lpfc_unblock_requests(phba); return ret; } static int -lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) -{ - int rc; - spin_lock_irq(cmnd->device->host->host_lock); - rc = __lpfc_reset_lun_handler(cmnd); - spin_unlock_irq(cmnd->device->host->host_lock); - return rc; -} - -/* - * Note: midlayer calls this function with the host_lock held - */ -static int -__lpfc_reset_bus_handler(struct scsi_cmnd *cmnd) +lpfc_reset_bus_handler(struct scsi_cmnd *cmnd) { struct Scsi_Host *shost = cmnd->device->host; struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0]; @@ -991,7 +1102,10 @@ __lpfc_reset_bus_handler(struct scsi_cmnd *cmnd) unsigned int midlayer_id = 0; struct lpfc_scsi_buf * lpfc_cmd; - lpfc_cmd = lpfc_sli_get_scsi_buf (phba); + lpfc_block_requests(phba); + spin_lock_irq(shost->host_lock); + + lpfc_cmd = lpfc_get_scsi_buf(phba); if (lpfc_cmd == NULL) goto out; @@ -1022,18 +1136,31 @@ __lpfc_reset_bus_handler(struct scsi_cmnd *cmnd) lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data; ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba); if (ret != SUCCESS) { - lpfc_printf_log(phba, KERN_INFO, LOG_FCP, + lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "%d:0713 Bus Reset on target %d failed\n", phba->brd_no, i); err_count++; } } + if (err_count == 0) + ret = SUCCESS; + + lpfc_release_scsi_buf(phba, lpfc_cmd); + + /* + * All outstanding txcmplq I/Os should have been aborted by + * the targets. Unfortunately, some targets do not abide by + * this forcing the driver to double check. + */ cmnd->device->id = midlayer_id; + cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], + 0, 0, LPFC_CTX_HOST); + if (cnt) + lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], + 0, 0, 0, LPFC_CTX_HOST); loopcnt = 0; - while((cnt = lpfc_sli_sum_iocb(phba, - &phba->sli.ring[phba->sli.fcp_ring], - 0, 0, LPFC_CTX_HOST))) { + while(cnt) { spin_unlock_irq(phba->host->host_lock); schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ); spin_lock_irq(phba->host->host_lock); @@ -1041,45 +1168,31 @@ __lpfc_reset_bus_handler(struct scsi_cmnd *cmnd) if (++loopcnt > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT) break; + + cnt = lpfc_sli_sum_iocb(phba, + &phba->sli.ring[phba->sli.fcp_ring], + 0, 0, LPFC_CTX_HOST); } if (cnt) { - /* flush all outstanding commands on the host */ - i = lpfc_sli_abort_iocb(phba, - &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0, - LPFC_CTX_HOST); - - lpfc_printf_log(phba, KERN_INFO, LOG_FCP, + lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n", phba->brd_no, cnt, i); - } - - if (cnt == 0) - ret = SUCCESS; - else ret = FAILED; + } - lpfc_release_scsi_buf(phba, lpfc_cmd); lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "%d:0714 SCSI layer issued Bus Reset Data: x%x\n", phba->brd_no, ret); out: + spin_unlock_irq(shost->host_lock); + lpfc_unblock_requests(phba); return ret; } static int -lpfc_reset_bus_handler(struct scsi_cmnd *cmnd) -{ - int rc; - spin_lock_irq(cmnd->device->host->host_lock); - rc = __lpfc_reset_bus_handler(cmnd); - spin_unlock_irq(cmnd->device->host->host_lock); - return rc; -} - -static int lpfc_slave_alloc(struct scsi_device *sdev) { struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0]; @@ -1127,10 +1240,10 @@ lpfc_slave_alloc(struct scsi_device *sdev) break; } - spin_lock_irqsave(phba->host->host_lock, flags); + spin_lock_irqsave(&phba->scsi_buf_list_lock, flags); phba->total_scsi_bufs++; list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list); - spin_unlock_irqrestore(phba->host->host_lock, flags); + spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags); } return 0; } @@ -1154,6 +1267,12 @@ lpfc_slave_configure(struct scsi_device *sdev) */ rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5; + if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { + lpfc_sli_poll_fcp_ring(phba); + if (phba->cfg_poll & DISABLE_FCP_RING_INT) + lpfc_poll_rearm_timer(phba); + } + return 0; } |