]> pilppa.org Git - linux-2.6-omap-h63xx.git/blobdiff - drivers/scsi/lpfc/lpfc_scsi.c
[SCSI] lpfc: bug fixes
[linux-2.6-omap-h63xx.git] / drivers / scsi / lpfc / lpfc_scsi.c
index 9a12d05e99e4d938460948186e8d0df9f7f9df5d..2de4c4e1cd808b17097781b505dc6e7d373bef99 100644 (file)
 #include "lpfc.h"
 #include "lpfc_logmsg.h"
 #include "lpfc_crtn.h"
+#include "lpfc_vport.h"
 
 #define LPFC_RESET_WAIT  2
 #define LPFC_ABORT_WAIT  2
 
+/*
+ * This function is called with no lock held when there is a resource
+ * error in driver or in firmware.
+ */
+void
+lpfc_adjust_queue_depth(struct lpfc_hba *phba)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(&phba->hbalock, flags);
+       atomic_inc(&phba->num_rsrc_err);
+       phba->last_rsrc_error_time = jiffies;
+
+       if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
+               spin_unlock_irqrestore(&phba->hbalock, flags);
+               return;
+       }
+
+       phba->last_ramp_down_time = jiffies;
+
+       spin_unlock_irqrestore(&phba->hbalock, flags);
+
+       spin_lock_irqsave(&phba->pport->work_port_lock, flags);
+       if ((phba->pport->work_port_events &
+               WORKER_RAMP_DOWN_QUEUE) == 0) {
+               phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
+       }
+       spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
+
+       spin_lock_irqsave(&phba->hbalock, flags);
+       if (phba->work_wait)
+               wake_up(phba->work_wait);
+       spin_unlock_irqrestore(&phba->hbalock, flags);
+
+       return;
+}
+
+/*
+ * This function is called with no lock held when there is a successful
+ * SCSI command completion.
+ */
+static inline void
+lpfc_rampup_queue_depth(struct lpfc_hba *phba,
+                       struct scsi_device *sdev)
+{
+       unsigned long flags;
+       atomic_inc(&phba->num_cmd_success);
+
+       if (phba->cfg_lun_queue_depth <= sdev->queue_depth)
+               return;
+
+       spin_lock_irqsave(&phba->hbalock, flags);
+       if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) ||
+        ((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) {
+               spin_unlock_irqrestore(&phba->hbalock, flags);
+               return;
+       }
+
+       phba->last_ramp_up_time = jiffies;
+       spin_unlock_irqrestore(&phba->hbalock, flags);
+
+       spin_lock_irqsave(&phba->pport->work_port_lock, flags);
+       if ((phba->pport->work_port_events &
+               WORKER_RAMP_UP_QUEUE) == 0) {
+               phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
+       }
+       spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
+
+       spin_lock_irqsave(&phba->hbalock, flags);
+       if (phba->work_wait)
+               wake_up(phba->work_wait);
+       spin_unlock_irqrestore(&phba->hbalock, flags);
+}
+
+void
+lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
+{
+       struct lpfc_vport *vport;
+       struct Scsi_Host  *host;
+       struct scsi_device *sdev;
+       unsigned long new_queue_depth;
+       unsigned long num_rsrc_err, num_cmd_success;
+
+       num_rsrc_err = atomic_read(&phba->num_rsrc_err);
+       num_cmd_success = atomic_read(&phba->num_cmd_success);
+
+       spin_lock_irq(&phba->hbalock);
+       list_for_each_entry(vport, &phba->port_list, listentry) {
+               host = lpfc_shost_from_vport(vport);
+               if (!scsi_host_get(host))
+                       continue;
+
+               spin_unlock_irq(&phba->hbalock);
+
+               shost_for_each_device(sdev, host) {
+                       new_queue_depth = sdev->queue_depth * num_rsrc_err /
+                       (num_rsrc_err + num_cmd_success);
+                       if (!new_queue_depth)
+                               new_queue_depth = sdev->queue_depth - 1;
+                       else
+                               new_queue_depth =
+                                       sdev->queue_depth - new_queue_depth;
+
+                       if (sdev->ordered_tags)
+                               scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
+                                       new_queue_depth);
+                       else
+                               scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
+                                       new_queue_depth);
+               }
+               spin_lock_irq(&phba->hbalock);
+               scsi_host_put(host);
+       }
+       spin_unlock_irq(&phba->hbalock);
+       atomic_set(&phba->num_rsrc_err, 0);
+       atomic_set(&phba->num_cmd_success, 0);
+}
+
+void
+lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
+{
+       struct lpfc_vport *vport;
+       struct Scsi_Host  *host;
+       struct scsi_device *sdev;
+
+       spin_lock_irq(&phba->hbalock);
+       list_for_each_entry(vport, &phba->port_list, listentry) {
+               host = lpfc_shost_from_vport(vport);
+               if (!scsi_host_get(host))
+                       continue;
+
+               spin_unlock_irq(&phba->hbalock);
+               shost_for_each_device(sdev, host) {
+                       if (sdev->ordered_tags)
+                               scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
+                                       sdev->queue_depth+1);
+                       else
+                               scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
+                                       sdev->queue_depth+1);
+               }
+               spin_lock_irq(&phba->hbalock);
+               scsi_host_put(host);
+       }
+       spin_unlock_irq(&phba->hbalock);
+       atomic_set(&phba->num_rsrc_err, 0);
+       atomic_set(&phba->num_cmd_success, 0);
+}
 
 /*
  * This routine allocates a scsi buffer, which contains all the necessary
  * and the BPL BDE is setup in the IOCB.
  */
 static struct lpfc_scsi_buf *
-lpfc_new_scsi_buf(struct lpfc_hba * phba)
+lpfc_new_scsi_buf(struct lpfc_vport *vport)
 {
+       struct lpfc_hba *phba = vport->phba;
        struct lpfc_scsi_buf *psb;
        struct ulp_bde64 *bpl;
        IOCB_t *iocb;
@@ -63,7 +212,6 @@ lpfc_new_scsi_buf(struct lpfc_hba * phba)
        if (!psb)
                return NULL;
        memset(psb, 0, sizeof (struct lpfc_scsi_buf));
-       psb->scsi_hba = phba;
 
        /*
         * Get memory from the pci pool to map the virt space to pci bus space
@@ -155,7 +303,7 @@ lpfc_get_scsi_buf(struct lpfc_hba * phba)
 }
 
 static void
-lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
+lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
 {
        unsigned long iflag = 0;
 
@@ -166,13 +314,16 @@ lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
 }
 
 static int
-lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
+lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
 {
        struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
        struct scatterlist *sgel = NULL;
        struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
        struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
        IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
+       uint32_t vpi = (lpfc_cmd->cur_iocbq.vport
+                       ? lpfc_cmd->cur_iocbq.vport->vpi
+                       : 0);
        dma_addr_t physaddr;
        uint32_t i, num_bde = 0;
        int datadir = scsi_cmnd->sc_data_direction;
@@ -236,9 +387,9 @@ lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
                dma_error = dma_mapping_error(physaddr);
                if (dma_error) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
-                               "%d:0718 Unable to dma_map_single "
-                               "request_buffer: x%x\n",
-                               phba->brd_no, dma_error);
+                                       "%d (%d):0718 Unable to dma_map_single "
+                                       "request_buffer: x%x\n",
+                                       phba->brd_no, vpi, dma_error);
                        return 1;
                }
 
@@ -292,13 +443,15 @@ lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
 }
 
 static void
-lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb)
+lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
+                   struct lpfc_iocbq *rsp_iocb)
 {
        struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
        struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
        struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
-       struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
+       struct lpfc_hba *phba = vport->phba;
        uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
+       uint32_t vpi = vport->vpi;
        uint32_t resp_info = fcprsp->rspStatus2;
        uint32_t scsi_status = fcprsp->rspStatus3;
        uint32_t *lp;
@@ -331,9 +484,9 @@ lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb)
                logit = LOG_FCP;
 
        lpfc_printf_log(phba, KERN_WARNING, logit,
-                       "%d:0730 FCP command x%x failed: x%x SNS x%x x%x "
+                       "%d (%d):0730 FCP command x%x failed: x%x SNS x%x x%x "
                        "Data: x%x x%x x%x x%x x%x\n",
-                       phba->brd_no, cmnd->cmnd[0], scsi_status,
+                       phba->brd_no, vpi, cmnd->cmnd[0], scsi_status,
                        be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
                        be32_to_cpu(fcprsp->rspResId),
                        be32_to_cpu(fcprsp->rspSnsLen),
@@ -354,10 +507,11 @@ lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb)
                cmnd->resid = be32_to_cpu(fcprsp->rspResId);
 
                lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
-                               "%d:0716 FCP Read Underrun, expected %d, "
-                               "residual %d Data: x%x x%x x%x\n", phba->brd_no,
-                               be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
-                               fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
+                               "%d (%d):0716 FCP Read Underrun, expected %d, "
+                               "residual %d Data: x%x x%x x%x\n",
+                               phba->brd_no, vpi, be32_to_cpu(fcpcmd->fcpDl),
+                               cmnd->resid, fcpi_parm, cmnd->cmnd[0],
+                               cmnd->underflow);
 
                /*
                 * If there is an under run check if under run reported by
@@ -368,12 +522,12 @@ lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb)
                        fcpi_parm &&
                        (cmnd->resid != fcpi_parm)) {
                        lpfc_printf_log(phba, KERN_WARNING,
-                               LOG_FCP | LOG_FCP_ERROR,
-                               "%d:0735 FCP Read Check Error and Underrun "
-                               "Data: x%x x%x x%x x%x\n", phba->brd_no,
-                               be32_to_cpu(fcpcmd->fcpDl),
-                               cmnd->resid,
-                               fcpi_parm, cmnd->cmnd[0]);
+                                       LOG_FCP | LOG_FCP_ERROR,
+                                       "%d (%d):0735 FCP Read Check Error "
+                                       "and Underrun Data: x%x x%x x%x x%x\n",
+                                       phba->brd_no, vpi,
+                                       be32_to_cpu(fcpcmd->fcpDl),
+                                       cmnd->resid, fcpi_parm, cmnd->cmnd[0]);
                        cmnd->resid = cmnd->request_bufflen;
                        host_status = DID_ERROR;
                }
@@ -387,19 +541,20 @@ lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb)
                    (scsi_status == SAM_STAT_GOOD) &&
                    (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
                        lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
-                                       "%d:0717 FCP command x%x residual "
+                                       "%d (%d):0717 FCP command x%x residual "
                                        "underrun converted to error "
-                                       "Data: x%x x%x x%x\n", phba->brd_no,
-                                       cmnd->cmnd[0], cmnd->request_bufflen,
-                                       cmnd->resid, cmnd->underflow);
+                                       "Data: x%x x%x x%x\n",
+                                       phba->brd_no, vpi, cmnd->cmnd[0],
+                                       cmnd->request_bufflen, cmnd->resid,
+                                       cmnd->underflow);
 
                        host_status = DID_ERROR;
                }
        } else if (resp_info & RESID_OVER) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
-                               "%d:0720 FCP command x%x residual "
+                               "%d (%d):0720 FCP command x%x residual "
                                "overrun error. Data: x%x x%x \n",
-                               phba->brd_no, cmnd->cmnd[0],
+                               phba->brd_no, vpi, cmnd->cmnd[0],
                                cmnd->request_bufflen, cmnd->resid);
                host_status = DID_ERROR;
 
@@ -410,11 +565,12 @@ lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb)
        } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
                        (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
-                       "%d:0734 FCP Read Check Error Data: "
-                       "x%x x%x x%x x%x\n", phba->brd_no,
-                       be32_to_cpu(fcpcmd->fcpDl),
-                       be32_to_cpu(fcprsp->rspResId),
-                       fcpi_parm, cmnd->cmnd[0]);
+                               "%d (%d):0734 FCP Read Check Error Data: "
+                               "x%x x%x x%x x%x\n",
+                               phba->brd_no, vpi,
+                               be32_to_cpu(fcpcmd->fcpDl),
+                               be32_to_cpu(fcprsp->rspResId),
+                               fcpi_parm, cmnd->cmnd[0]);
                host_status = DID_ERROR;
                cmnd->resid = cmnd->request_bufflen;
        }
@@ -429,9 +585,13 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 {
        struct lpfc_scsi_buf *lpfc_cmd =
                (struct lpfc_scsi_buf *) pIocbIn->context1;
+       struct lpfc_vport      *vport = pIocbIn->vport;
        struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
        struct lpfc_nodelist *pnode = rdata->pnode;
        struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
+       uint32_t vpi = (lpfc_cmd->cur_iocbq.vport
+                       ? lpfc_cmd->cur_iocbq.vport->vpi
+                       : 0);
        int result;
        struct scsi_device *sdev, *tmp_sdev;
        int depth = 0;
@@ -447,22 +607,31 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
                        lpfc_cmd->status = IOSTAT_DEFAULT;
 
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
-                               "%d:0729 FCP cmd x%x failed <%d/%d> status: "
-                               "x%x result: x%x Data: x%x x%x\n",
-                               phba->brd_no, cmd->cmnd[0], cmd->device->id,
-                               cmd->device->lun, lpfc_cmd->status,
-                               lpfc_cmd->result, pIocbOut->iocb.ulpContext,
+                               "%d (%d):0729 FCP cmd x%x failed <%d/%d> "
+                               "status: x%x result: x%x Data: x%x x%x\n",
+                               phba->brd_no, vpi, cmd->cmnd[0],
+                               cmd->device ? cmd->device->id : 0xffff,
+                               cmd->device ? cmd->device->lun : 0xffff,
+                               lpfc_cmd->status, lpfc_cmd->result,
+                               pIocbOut->iocb.ulpContext,
                                lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 
                switch (lpfc_cmd->status) {
                case IOSTAT_FCP_RSP_ERROR:
                        /* Call FCP RSP handler to determine result */
-                       lpfc_handle_fcp_err(lpfc_cmd,pIocbOut);
+                       lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
                        break;
                case IOSTAT_NPORT_BSY:
                case IOSTAT_FABRIC_BSY:
                        cmd->result = ScsiResult(DID_BUS_BUSY, 0);
                        break;
+               case IOSTAT_LOCAL_REJECT:
+                       if (lpfc_cmd->result == RJT_UNAVAIL_PERM ||
+                           lpfc_cmd->result == IOERR_NO_RESOURCES ||
+                           lpfc_cmd->result == RJT_LOGIN_REQUIRED) {
+                               cmd->result = ScsiResult(DID_REQUEUE, 0);
+                       break;
+               } /* else: fall through */
                default:
                        cmd->result = ScsiResult(DID_ERROR, 0);
                        break;
@@ -479,9 +648,9 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
                uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 
                lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
-                               "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
-                               "SNS x%x x%x Data: x%x x%x\n",
-                               phba->brd_no, cmd->device->id,
+                               "%d (%d):0710 Iodone <%d/%d> cmd %p, error "
+                               "x%x SNS x%x x%x Data: x%x x%x\n",
+                               phba->brd_no, vpi, cmd->device->id,
                                cmd->device->lun, cmd, cmd->result,
                                *lp, *(lp + 3), cmd->retries, cmd->resid);
        }
@@ -496,6 +665,10 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
                return;
        }
 
+
+       if (!result)
+               lpfc_rampup_queue_depth(phba, sdev);
+
        if (!result && pnode != NULL &&
           ((jiffies - pnode->last_ramp_up_time) >
                LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
@@ -534,7 +707,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
                                        tmp_sdev->queue_depth - 1);
                }
                /*
-                * The queue depth cannot be lowered any more.
+                * 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.
@@ -544,8 +717,9 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 
                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);
+                                       "%d (%d):0711 detected queue full - "
+                                       "lun queue depth  adjusted to %d.\n",
+                                       phba->brd_no, vpi, depth);
                }
        }
 
@@ -553,9 +727,10 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 }
 
 static void
-lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
-                       struct lpfc_nodelist *pnode)
+lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
+                   struct lpfc_nodelist *pnode)
 {
+       struct lpfc_hba *phba = vport->phba;
        struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
        struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
        IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
@@ -642,15 +817,15 @@ lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
        piocbq->context1  = lpfc_cmd;
        piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
        piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
+       piocbq->vport = vport;
 }
 
 static int
-lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
+lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
                             struct lpfc_scsi_buf *lpfc_cmd,
                             unsigned int lun,
                             uint8_t task_mgmt_cmd)
 {
-       struct lpfc_sli *psli;
        struct lpfc_iocbq *piocbq;
        IOCB_t *piocb;
        struct fcp_cmnd *fcp_cmnd;
@@ -661,8 +836,9 @@ lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
                return 0;
        }
 
-       psli = &phba->sli;
        piocbq = &(lpfc_cmd->cur_iocbq);
+       piocbq->vport = vport;
+
        piocb = &piocbq->iocb;
 
        fcp_cmnd = lpfc_cmd->fcp_cmnd;
@@ -688,7 +864,7 @@ lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
                piocb->ulpTimeout = lpfc_cmd->timeout;
        }
 
-       return (1);
+       return 1;
 }
 
 static void
@@ -704,10 +880,11 @@ lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
 }
 
 static int
-lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba,
+lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
                    unsigned  tgt_id, unsigned int lun,
                    struct lpfc_rport_data *rdata)
 {
+       struct lpfc_hba   *phba = vport->phba;
        struct lpfc_iocbq *iocbq;
        struct lpfc_iocbq *iocbqrsp;
        int ret;
@@ -716,12 +893,11 @@ lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba,
                return FAILED;
 
        lpfc_cmd->rdata = rdata;
-       ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, lun,
+       ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
                                           FCP_TARGET_RESET);
        if (!ret)
                return FAILED;
 
-       lpfc_cmd->scsi_hba = phba;
        iocbq = &lpfc_cmd->cur_iocbq;
        iocbqrsp = lpfc_sli_get_iocbq(phba);
 
@@ -730,10 +906,10 @@ lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba,
 
        /* Issue Target Reset to TGT <num> */
        lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
-                       "%d:0702 Issue Target Reset to TGT %d "
+                       "%d (%d):0702 Issue Target Reset to TGT %d "
                        "Data: x%x x%x\n",
-                       phba->brd_no, tgt_id, rdata->pnode->nlp_rpi,
-                       rdata->pnode->nlp_flag);
+                       phba->brd_no, vport->vpi, tgt_id,
+                       rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
 
        ret = lpfc_sli_issue_iocb_wait(phba,
                                       &phba->sli.ring[phba->sli.fcp_ring],
@@ -758,7 +934,8 @@ lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba,
 const char *
 lpfc_info(struct Scsi_Host *host)
 {
-       struct lpfc_hba    *phba = (struct lpfc_hba *) host->hostdata;
+       struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
+       struct lpfc_hba   *phba = vport->phba;
        int len;
        static char  lpfcinfobuf[384];
 
@@ -800,26 +977,22 @@ void lpfc_poll_start_timer(struct lpfc_hba * 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);
+       struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
 
        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 *))
 {
-       struct lpfc_hba *phba =
-               (struct lpfc_hba *) cmnd->device->host->hostdata;
-       struct lpfc_sli *psli = &phba->sli;
+       struct Scsi_Host  *shost = cmnd->device->host;
+       struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
+       struct lpfc_hba   *phba = vport->phba;
+       struct lpfc_sli   *psli = &phba->sli;
        struct lpfc_rport_data *rdata = cmnd->device->hostdata;
        struct lpfc_nodelist *ndlp = rdata->pnode;
        struct lpfc_scsi_buf *lpfc_cmd;
@@ -840,11 +1013,14 @@ 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_get_scsi_buf (phba);
+       lpfc_cmd = lpfc_get_scsi_buf(phba);
        if (lpfc_cmd == NULL) {
+               lpfc_adjust_queue_depth(phba);
+
                lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
-                               "%d:0707 driver's buffer pool is empty, "
-                               "IO busied\n", phba->brd_no);
+                               "%d (%d):0707 driver's buffer pool is empty, "
+                               "IO busied\n",
+                               phba->brd_no, vport->vpi);
                goto out_host_busy;
        }
 
@@ -862,10 +1038,10 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
        if (err)
                goto out_host_busy_free_buf;
 
-       lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
+       lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
 
        err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
-                               &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
+                                 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
        if (err)
                goto out_host_busy_free_buf;
 
@@ -907,8 +1083,9 @@ lpfc_block_error_handler(struct scsi_cmnd *cmnd)
 static int
 lpfc_abort_handler(struct scsi_cmnd *cmnd)
 {
-       struct Scsi_Host *shost = cmnd->device->host;
-       struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
+       struct Scsi_Host  *shost = cmnd->device->host;
+       struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
+       struct lpfc_hba   *phba = vport->phba;
        struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
        struct lpfc_iocbq *iocb;
        struct lpfc_iocbq *abtsiocb;
@@ -918,8 +1095,6 @@ lpfc_abort_handler(struct scsi_cmnd *cmnd)
        int ret = SUCCESS;
 
        lpfc_block_error_handler(cmnd);
-       spin_lock_irq(shost->host_lock);
-
        lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
        BUG_ON(!lpfc_cmd);
 
@@ -956,12 +1131,13 @@ lpfc_abort_handler(struct scsi_cmnd *cmnd)
 
        icmd->ulpLe = 1;
        icmd->ulpClass = cmd->ulpClass;
-       if (phba->hba_state >= LPFC_LINK_UP)
+       if (lpfc_is_link_up(phba))
                icmd->ulpCommand = CMD_ABORT_XRI_CN;
        else
                icmd->ulpCommand = CMD_CLOSE_XRI_CN;
 
        abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
+       abtsiocb->vport = vport;
        if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
                lpfc_sli_release_iocbq(phba, abtsiocb);
                ret = FAILED;
@@ -977,9 +1153,7 @@ lpfc_abort_handler(struct scsi_cmnd *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);
+               schedule_timeout_uninterruptible(LPFC_ABORT_WAIT * HZ);
                if (++loop_count
                    > (2 * phba->cfg_devloss_tmo)/LPFC_ABORT_WAIT)
                        break;
@@ -988,30 +1162,30 @@ lpfc_abort_handler(struct scsi_cmnd *cmnd)
        if (lpfc_cmd->pCmd == cmnd) {
                ret = FAILED;
                lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
-                               "%d:0748 abort handler timed out waiting for "
-                               "abort to complete: ret %#x, ID %d, LUN %d, "
-                               "snum %#lx\n",
-                               phba->brd_no,  ret, cmnd->device->id,
-                               cmnd->device->lun, cmnd->serial_number);
+                               "%d (%d):0748 abort handler timed out waiting "
+                               "for abort to complete: ret %#x, ID %d, "
+                               "LUN %d, snum %#lx\n",
+                               phba->brd_no, vport->vpi, ret,
+                               cmnd->device->id, cmnd->device->lun,
+                               cmnd->serial_number);
        }
 
  out:
        lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
-                       "%d:0749 SCSI Layer I/O Abort Request "
+                       "%d (%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,
+                       phba->brd_no, vport->vpi, ret, cmnd->device->id,
                        cmnd->device->lun, cmnd->serial_number);
 
-       spin_unlock_irq(shost->host_lock);
-
        return ret;
 }
 
 static int
 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
 {
-       struct Scsi_Host *shost = cmnd->device->host;
-       struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
+       struct Scsi_Host  *shost = cmnd->device->host;
+       struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
+       struct lpfc_hba   *phba = vport->phba;
        struct lpfc_scsi_buf *lpfc_cmd;
        struct lpfc_iocbq *iocbq, *iocbqrsp;
        struct lpfc_rport_data *rdata = cmnd->device->hostdata;
@@ -1022,28 +1196,26 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
        int cnt, loopcnt;
 
        lpfc_block_error_handler(cmnd);
-       spin_lock_irq(shost->host_lock);
        loopcnt = 0;
        /*
         * If target is not in a MAPPED state, delay the reset until
         * target is rediscovered or devloss timeout expires.
         */
-       while ( 1 ) {
+       while (1) {
                if (!pnode)
                        goto out;
 
                if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
-                       spin_unlock_irq(phba->host->host_lock);
                        schedule_timeout_uninterruptible(msecs_to_jiffies(500));
-                       spin_lock_irq(phba->host->host_lock);
                        loopcnt++;
                        rdata = cmnd->device->hostdata;
                        if (!rdata ||
                                (loopcnt > ((phba->cfg_devloss_tmo * 2) + 1))) {
                                lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
-                                       "%d:0721 LUN Reset rport failure:"
-                                       " cnt x%x rdata x%p\n",
-                                       phba->brd_no, loopcnt, rdata);
+                                               "%d (%d):0721 LUN Reset rport "
+                                               "failure: cnt x%x rdata x%p\n",
+                                               phba->brd_no, vport->vpi,
+                                               loopcnt, rdata);
                                goto out;
                        }
                        pnode = rdata->pnode;
@@ -1054,15 +1226,14 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
                        break;
        }
 
-       lpfc_cmd = lpfc_get_scsi_buf (phba);
+       lpfc_cmd = lpfc_get_scsi_buf(phba);
        if (lpfc_cmd == NULL)
                goto out;
 
        lpfc_cmd->timeout = 60;
-       lpfc_cmd->scsi_hba = phba;
        lpfc_cmd->rdata = rdata;
 
-       ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, cmnd->device->lun,
+       ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun,
                                           FCP_TARGET_RESET);
        if (!ret)
                goto out_free_scsi_buf;
@@ -1075,8 +1246,9 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
                goto out_free_scsi_buf;
 
        lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
-                       "%d:0703 Issue target reset to TGT %d LUN %d rpi x%x "
-                       "nlp_flag x%x\n", phba->brd_no, cmnd->device->id,
+                       "%d (%d):0703 Issue target reset to TGT %d LUN %d "
+                       "rpi x%x nlp_flag x%x\n",
+                       phba->brd_no, vport->vpi, cmnd->device->id,
                        cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
 
        iocb_status = lpfc_sli_issue_iocb_wait(phba,
@@ -1111,9 +1283,7 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
                                    0, LPFC_CTX_LUN);
        loopcnt = 0;
        while(cnt) {
-               spin_unlock_irq(phba->host->host_lock);
                schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
-               spin_lock_irq(phba->host->host_lock);
 
                if (++loopcnt
                    > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
@@ -1127,8 +1297,9 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
 
        if (cnt) {
                lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
-                       "%d:0719 device reset I/O flush failure: cnt x%x\n",
-                       phba->brd_no, cnt);
+                               "%d (%d):0719 device reset I/O flush failure: "
+                               "cnt x%x\n",
+                               phba->brd_no, vport->vpi, cnt);
                ret = FAILED;
        }
 
@@ -1137,21 +1308,21 @@ out_free_scsi_buf:
                lpfc_release_scsi_buf(phba, lpfc_cmd);
        }
        lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
-                       "%d:0713 SCSI layer issued device reset (%d, %d) "
+                       "%d (%d):0713 SCSI layer issued device reset (%d, %d) "
                        "return x%x status x%x result x%x\n",
-                       phba->brd_no, cmnd->device->id, cmnd->device->lun,
-                       ret, cmd_status, cmd_result);
+                       phba->brd_no, vport->vpi, cmnd->device->id,
+                       cmnd->device->lun, ret, cmd_status, cmd_result);
 
 out:
-       spin_unlock_irq(shost->host_lock);
        return ret;
 }
 
 static int
 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
 {
-       struct Scsi_Host *shost = cmnd->device->host;
-       struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
+       struct Scsi_Host  *shost = cmnd->device->host;
+       struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
+       struct lpfc_hba   *phba = vport->phba;
        struct lpfc_nodelist *ndlp = NULL;
        int match;
        int ret = FAILED, i, err_count = 0;
@@ -1159,7 +1330,6 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
        struct lpfc_scsi_buf * lpfc_cmd;
 
        lpfc_block_error_handler(cmnd);
-       spin_lock_irq(shost->host_lock);
 
        lpfc_cmd = lpfc_get_scsi_buf(phba);
        if (lpfc_cmd == NULL)
@@ -1167,7 +1337,6 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
 
        /* The lpfc_cmd storage is reused.  Set all loop invariants. */
        lpfc_cmd->timeout = 60;
-       lpfc_cmd->scsi_hba = phba;
 
        /*
         * Since the driver manages a single bus device, reset all
@@ -1177,7 +1346,8 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
        for (i = 0; i < LPFC_MAX_TARGET; i++) {
                /* Search for mapped node by target ID */
                match = 0;
-               list_for_each_entry(ndlp, &phba->fc_nodes, nlp_listp) {
+               spin_lock_irq(shost->host_lock);
+               list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
                        if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
                            i == ndlp->nlp_sid &&
                            ndlp->rport) {
@@ -1185,15 +1355,18 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
                                break;
                        }
                }
+               spin_unlock_irq(shost->host_lock);
                if (!match)
                        continue;
 
-               ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba, i, cmnd->device->lun,
+               ret = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
+                                         cmnd->device->lun,
                                          ndlp->rport->dd_data);
                if (ret != SUCCESS) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
-                               "%d:0700 Bus Reset on target %d failed\n",
-                               phba->brd_no, i);
+                                       "%d (%d):0700 Bus Reset on target %d "
+                                       "failed\n",
+                                       phba->brd_no, vport->vpi, i);
                        err_count++;
                        break;
                }
@@ -1219,9 +1392,7 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
                                    0, 0, 0, LPFC_CTX_HOST);
        loopcnt = 0;
        while(cnt) {
-               spin_unlock_irq(phba->host->host_lock);
                schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
-               spin_lock_irq(phba->host->host_lock);
 
                if (++loopcnt
                    > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
@@ -1234,25 +1405,24 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
 
        if (cnt) {
                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);
+                               "%d (%d):0715 Bus Reset I/O flush failure: "
+                               "cnt x%x left x%x\n",
+                               phba->brd_no, vport->vpi, cnt, i);
                ret = FAILED;
        }
 
-       lpfc_printf_log(phba,
-                       KERN_ERR,
-                       LOG_FCP,
-                       "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
-                       phba->brd_no, ret);
+       lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
+                       "%d (%d):0714 SCSI layer issued Bus Reset Data: x%x\n",
+                       phba->brd_no, vport->vpi, ret);
 out:
-       spin_unlock_irq(shost->host_lock);
        return ret;
 }
 
 static int
 lpfc_slave_alloc(struct scsi_device *sdev)
 {
-       struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata;
+       struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
+       struct lpfc_hba   *phba = vport->phba;
        struct lpfc_scsi_buf *scsi_buf = NULL;
        struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
        uint32_t total = 0, i;
@@ -1273,27 +1443,35 @@ lpfc_slave_alloc(struct scsi_device *sdev)
         */
        total = phba->total_scsi_bufs;
        num_to_alloc = phba->cfg_lun_queue_depth + 2;
-       if (total >= phba->cfg_hba_queue_depth) {
+
+       /* Allow some exchanges to be available always to complete discovery */
+       if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
-                               "%d:0704 At limitation of %d preallocated "
-                               "command buffers\n", phba->brd_no, total);
+                               "%d (%d):0704 At limitation of %d "
+                               "preallocated command buffers\n",
+                               phba->brd_no, vport->vpi, total);
                return 0;
-       } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
+
+       /* Allow some exchanges to be available always to complete discovery */
+       } else if (total + num_to_alloc >
+               phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
-                               "%d:0705 Allocation request of %d command "
-                               "buffers will exceed max of %d.  Reducing "
-                               "allocation request to %d.\n", phba->brd_no,
-                               num_to_alloc, phba->cfg_hba_queue_depth,
+                               "%d (%d):0705 Allocation request of %d "
+                               "command buffers will exceed max of %d.  "
+                               "Reducing allocation request to %d.\n",
+                               phba->brd_no, vport->vpi, num_to_alloc,
+                               phba->cfg_hba_queue_depth,
                                (phba->cfg_hba_queue_depth - total));
                num_to_alloc = phba->cfg_hba_queue_depth - total;
        }
 
        for (i = 0; i < num_to_alloc; i++) {
-               scsi_buf = lpfc_new_scsi_buf(phba);
+               scsi_buf = lpfc_new_scsi_buf(vport);
                if (!scsi_buf) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
-                                       "%d:0706 Failed to allocate command "
-                                       "buffer\n", phba->brd_no);
+                                       "%d (%d):0706 Failed to allocate "
+                                       "command buffer\n",
+                                       phba->brd_no, vport->vpi);
                        break;
                }
 
@@ -1308,8 +1486,9 @@ lpfc_slave_alloc(struct scsi_device *sdev)
 static int
 lpfc_slave_configure(struct scsi_device *sdev)
 {
-       struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata;
-       struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
+       struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
+       struct lpfc_hba   *phba = vport->phba;
+       struct fc_rport   *rport = starget_to_rport(sdev->sdev_target);
 
        if (sdev->tagged_supported)
                scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
@@ -1340,6 +1519,7 @@ lpfc_slave_destroy(struct scsi_device *sdev)
        return;
 }
 
+
 struct scsi_host_template lpfc_template = {
        .module                 = THIS_MODULE,
        .name                   = LPFC_DRIVER_NAME,
@@ -1352,11 +1532,10 @@ struct scsi_host_template lpfc_template = {
        .slave_configure        = lpfc_slave_configure,
        .slave_destroy          = lpfc_slave_destroy,
        .scan_finished          = lpfc_scan_finished,
-       .scan_start             = lpfc_scan_start,
        .this_id                = -1,
        .sg_tablesize           = LPFC_SG_SEG_CNT,
        .cmd_per_lun            = LPFC_CMD_PER_LUN,
        .use_clustering         = ENABLE_CLUSTERING,
-       .shost_attrs            = lpfc_host_attrs,
+       .shost_attrs            = lpfc_hba_attrs,
        .max_sectors            = 0xFFFF,
 };