/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
- * Copyright (C) 2004-2005 Emulex. All rights reserved. *
+ * Copyright (C) 2004-2006 Emulex. All rights reserved. *
* EMULEX and SLI are trademarks of Emulex. *
* www.emulex.com *
* Portions Copyright (C) 2004-2005 Christoph Hellwig *
#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
return psb;
}
-struct lpfc_scsi_buf*
-lpfc_sli_get_scsi_buf(struct lpfc_hba * phba)
+static struct lpfc_scsi_buf*
+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
}
}
+ 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
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;
*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 && pnode != NULL &&
+ ((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 != NULL) {
+ 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
const char *
lpfc_info(struct Scsi_Host *host)
{
- struct lpfc_hba *phba = (struct lpfc_hba *) host->hostdata[0];
+ struct lpfc_hba *phba = (struct lpfc_hba *) host->hostdata;
int len;
static char lpfcinfobuf[384];
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 *))
{
struct lpfc_hba *phba =
- (struct lpfc_hba *) cmnd->device->host->hostdata[0];
+ (struct lpfc_hba *) cmnd->device->host->hostdata;
struct lpfc_sli *psli = &phba->sli;
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *ndlp = rdata->pnode;
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;
}
&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;
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;
struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
struct lpfc_iocbq *iocb;
struct lpfc_iocbq *abtsiocb;
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);
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);
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];
+ struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
struct lpfc_scsi_buf *lpfc_cmd;
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.
break;
}
- lpfc_cmd = lpfc_sli_get_scsi_buf (phba);
+ lpfc_cmd = lpfc_get_scsi_buf (phba);
if (lpfc_cmd == NULL)
goto out;
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);
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) {
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];
+ struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
struct lpfc_nodelist *ndlp = NULL;
int match;
int ret = FAILED, i, err_count = 0;
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;
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);
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];
+ struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata;
struct lpfc_scsi_buf *scsi_buf = NULL;
struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
uint32_t total = 0, i;
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;
}
static int
lpfc_slave_configure(struct scsi_device *sdev)
{
- struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0];
+ struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata;
struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
if (sdev->tagged_supported)
*/
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;
}
projects / linux-2.6-omap-h63xx.git / blobdiff