[SCSI] lpfc: NPIV: add NPIV support on top of SLI-3
NPIV support is added to the driver. It utilizes the interfaces of
the fc transport for the creation and deletion of vports. Within the
driver, a new Scsi_Host is created for each NPIV instance, and is
paired with a new instance of a FC port. This allows N FC Port
elements to share a single Adapter.
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 90c8873..af8f896 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -37,11 +37,160 @@
#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
* information needed to initiate a SCSI I/O. The non-DMAable buffer region
* contains information to build the IOCB. The DMAable region contains
@@ -154,7 +303,7 @@
}
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;
@@ -165,13 +314,16 @@
}
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;
@@ -235,9 +387,9 @@
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;
}
@@ -299,6 +451,7 @@
struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
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 @@
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 @@
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 @@
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 @@
(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 @@
} 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;
}
@@ -433,6 +589,9 @@
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;
@@ -448,11 +607,13 @@
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) {
@@ -464,6 +625,13 @@
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;
@@ -480,9 +648,9 @@
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);
}
@@ -497,6 +665,10 @@
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) &&
@@ -545,8 +717,9 @@
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);
}
}
@@ -733,10 +906,10 @@
/* 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],
@@ -842,9 +1015,12 @@
}
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;
}
@@ -865,7 +1041,7 @@
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;
@@ -986,18 +1162,19 @@
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);
return ret;
@@ -1024,7 +1201,7 @@
* 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;
@@ -1035,9 +1212,10 @@
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;
@@ -1068,8 +1246,9 @@
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,
@@ -1103,7 +1282,7 @@
cmnd->device->id, cmnd->device->lun,
0, LPFC_CTX_LUN);
loopcnt = 0;
- while (cnt) {
+ while(cnt) {
schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
if (++loopcnt
@@ -1118,8 +1297,9 @@
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;
}
@@ -1128,10 +1308,10 @@
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:
return ret;
@@ -1184,8 +1364,9 @@
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;
}
@@ -1210,7 +1391,7 @@
lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
0, 0, 0, LPFC_CTX_HOST);
loopcnt = 0;
- while (cnt) {
+ while(cnt) {
schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
if (++loopcnt
@@ -1224,16 +1405,15 @@
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:
return ret;
}
@@ -1263,17 +1443,24 @@
*/
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;
}
@@ -1282,8 +1469,9 @@
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;
}
@@ -1331,6 +1519,7 @@
return;
}
+
struct scsi_host_template lpfc_template = {
.module = THIS_MODULE,
.name = LPFC_DRIVER_NAME,