[SCSI] lpfc 8.3.18: Add logic to detect last devloss timeout

Added driver logic to detect the last devloss timeout of remote nodes which
was still in use of FCF. At that point, the driver should set the last
in-use remote node devloss timeout flag if it was not already set and should
perform proper action on the in-use FCF and recover of FCF from firmware,
depending on the state the driver's FIP engine is in.

Find eligible FCF through FCF table rescan or the next new FCF event when
FCF table rescan turned out empty eligible FCF, and the successful flogi
into an FCF shall clear the HBA_DEVLOSS_TMO flag, indicating the successful
recovery from devloss timeout.

[jejb: add delay.h include to lpfc_hbadisc.c to fix ppc compile]
Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 24 insertions, 48 deletions

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 0d1e187b005d..9d2e1347cb1d 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -5921,7 +5921,7 @@ lpfc_sli4_bpl2sgl(struct lpfc_hba *phba, struct lpfc_iocbq *piocbq,
  * lpfc_sli4_scmd_to_wqidx_distr - scsi command to SLI4 WQ index distribution
  * @phba: Pointer to HBA context object.
  *
- * This routine performs a round robin SCSI command to SLI4 FCP WQ index
+ * This routine performs a roundrobin SCSI command to SLI4 FCP WQ index
  * distribution.  This is called by __lpfc_sli_issue_iocb_s4() with the hbalock
  * held.
  *
@@ -12242,13 +12242,15 @@ lpfc_sli4_fcf_scan_read_fcf_rec(struct lpfc_hba *phba, uint16_t fcf_index)
         /* Issue the mailbox command asynchronously */
         mboxq->vport = phba->pport;
         mboxq->mbox_cmpl = lpfc_mbx_cmpl_fcf_scan_read_fcf_rec;
+
+        spin_lock_irq(&phba->hbalock);
+        phba->hba_flag |= FCF_TS_INPROG;
+        spin_unlock_irq(&phba->hbalock);
+
         rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
         if (rc == MBX_NOT_FINISHED)
                 error = -EIO;
         else {
-                spin_lock_irq(&phba->hbalock);
-                phba->hba_flag |= FCF_DISC_INPROGRESS;
-                spin_unlock_irq(&phba->hbalock);
                 /* Reset eligible FCF count for new scan */
                 if (fcf_index == LPFC_FCOE_FCF_GET_FIRST)
                         phba->fcf.eligible_fcf_cnt = 0;
@@ -12258,21 +12260,21 @@ fail_fcf_scan:
         if (error) {
                 if (mboxq)
                         lpfc_sli4_mbox_cmd_free(phba, mboxq);
-                /* FCF scan failed, clear FCF_DISC_INPROGRESS flag */
+                /* FCF scan failed, clear FCF_TS_INPROG flag */
                 spin_lock_irq(&phba->hbalock);
-                phba->hba_flag &= ~FCF_DISC_INPROGRESS;
+                phba->hba_flag &= ~FCF_TS_INPROG;
                 spin_unlock_irq(&phba->hbalock);
         }
         return error;
 }
 
 /**
- * lpfc_sli4_fcf_rr_read_fcf_rec - Read hba fcf record for round robin fcf.
+ * lpfc_sli4_fcf_rr_read_fcf_rec - Read hba fcf record for roundrobin fcf.
  * @phba: pointer to lpfc hba data structure.
  * @fcf_index: FCF table entry offset.
  *
  * This routine is invoked to read an FCF record indicated by @fcf_index
- * and to use it for FLOGI round robin FCF failover.
+ * and to use it for FLOGI roundrobin FCF failover.
  *
  * Return 0 if the mailbox command is submitted sucessfully, none 0
  * otherwise.
@@ -12318,7 +12320,7 @@ fail_fcf_read:
  * @fcf_index: FCF table entry offset.
  *
  * This routine is invoked to read an FCF record indicated by @fcf_index to
- * determine whether it's eligible for FLOGI round robin failover list.
+ * determine whether it's eligible for FLOGI roundrobin failover list.
  *
  * Return 0 if the mailbox command is submitted sucessfully, none 0
  * otherwise.
@@ -12364,7 +12366,7 @@ fail_fcf_read:
  *
  * This routine is to get the next eligible FCF record index in a round
  * robin fashion. If the next eligible FCF record index equals to the
- * initial round robin FCF record index, LPFC_FCOE_FCF_NEXT_NONE (0xFFFF)
+ * initial roundrobin FCF record index, LPFC_FCOE_FCF_NEXT_NONE (0xFFFF)
  * shall be returned, otherwise, the next eligible FCF record's index
  * shall be returned.
  **/
@@ -12392,28 +12394,10 @@ lpfc_sli4_fcf_rr_next_index_get(struct lpfc_hba *phba)
                 return LPFC_FCOE_FCF_NEXT_NONE;
         }
 
-        /* Check roundrobin failover index bmask stop condition */
-        if (next_fcf_index == phba->fcf.fcf_rr_init_indx) {
-                if (!(phba->fcf.fcf_flag & FCF_REDISC_RRU)) {
-                        lpfc_printf_log(phba, KERN_WARNING, LOG_FIP,
-                                        "2847 Round robin failover FCF index "
-                                        "search hit stop condition:x%x\n",
-                                        next_fcf_index);
-                        return LPFC_FCOE_FCF_NEXT_NONE;
-                }
-                /* The roundrobin failover index bmask updated, start over */
-                lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
-                                "2848 Round robin failover FCF index bmask "
-                                "updated, start over\n");
-                spin_lock_irq(&phba->hbalock);
-                phba->fcf.fcf_flag &= ~FCF_REDISC_RRU;
-                spin_unlock_irq(&phba->hbalock);
-                return phba->fcf.fcf_rr_init_indx;
-        }
-
         lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
-                        "2845 Get next round robin failover "
-                        "FCF index x%x\n", next_fcf_index);
+                        "2845 Get next roundrobin failover FCF (x%x)\n",
+                        next_fcf_index);
+
         return next_fcf_index;
 }
 
@@ -12422,7 +12406,7 @@ lpfc_sli4_fcf_rr_next_index_get(struct lpfc_hba *phba)
  * @phba: pointer to lpfc hba data structure.
  *
  * This routine sets the FCF record index in to the eligible bmask for
- * round robin failover search. It checks to make sure that the index
+ * roundrobin failover search. It checks to make sure that the index
  * does not go beyond the range of the driver allocated bmask dimension
  * before setting the bit.
  *
@@ -12434,22 +12418,16 @@ lpfc_sli4_fcf_rr_index_set(struct lpfc_hba *phba, uint16_t fcf_index)
 {
         if (fcf_index >= LPFC_SLI4_FCF_TBL_INDX_MAX) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_FIP,
-                                "2610 HBA FCF index reached driver's "
-                                "book keeping dimension: fcf_index:%d, "
-                                "driver_bmask_max:%d\n",
+                                "2610 FCF (x%x) reached driver's book "
+                                "keeping dimension:x%x\n",
                                 fcf_index, LPFC_SLI4_FCF_TBL_INDX_MAX);
                 return -EINVAL;
         }
         /* Set the eligible FCF record index bmask */
         set_bit(fcf_index, phba->fcf.fcf_rr_bmask);
 
-        /* Set the roundrobin index bmask updated */
-        spin_lock_irq(&phba->hbalock);
-        phba->fcf.fcf_flag |= FCF_REDISC_RRU;
-        spin_unlock_irq(&phba->hbalock);
-
         lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
-                        "2790 Set FCF index x%x to round robin failover "
+                        "2790 Set FCF (x%x) to roundrobin FCF failover "
                         "bmask\n", fcf_index);
 
         return 0;
@@ -12460,7 +12438,7 @@ lpfc_sli4_fcf_rr_index_set(struct lpfc_hba *phba, uint16_t fcf_index)
  * @phba: pointer to lpfc hba data structure.
  *
  * This routine clears the FCF record index from the eligible bmask for
- * round robin failover search. It checks to make sure that the index
+ * roundrobin failover search. It checks to make sure that the index
  * does not go beyond the range of the driver allocated bmask dimension
  * before clearing the bit.
  **/
@@ -12469,9 +12447,8 @@ lpfc_sli4_fcf_rr_index_clear(struct lpfc_hba *phba, uint16_t fcf_index)
 {
         if (fcf_index >= LPFC_SLI4_FCF_TBL_INDX_MAX) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_FIP,
-                                "2762 HBA FCF index goes beyond driver's "
-                                "book keeping dimension: fcf_index:%d, "
-                                "driver_bmask_max:%d\n",
+                                "2762 FCF (x%x) reached driver's book "
+                                "keeping dimension:x%x\n",
                                 fcf_index, LPFC_SLI4_FCF_TBL_INDX_MAX);
                 return;
         }
@@ -12479,7 +12456,7 @@ lpfc_sli4_fcf_rr_index_clear(struct lpfc_hba *phba, uint16_t fcf_index)
         clear_bit(fcf_index, phba->fcf.fcf_rr_bmask);
 
         lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
-                        "2791 Clear FCF index x%x from round robin failover "
+                        "2791 Clear FCF (x%x) from roundrobin failover "
                         "bmask\n", fcf_index);
 }
 
@@ -12530,8 +12507,7 @@ lpfc_mbx_cmpl_redisc_fcf_table(struct lpfc_hba *phba, LPFC_MBOXQ_t *mbox)
                 }
         } else {
                 lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
-                                "2775 Start FCF rediscovery quiescent period "
-                                "wait timer before scaning FCF table\n");
+                                "2775 Start FCF rediscover quiescent timer\n");
                 /*
                  * Start FCF rediscovery wait timer for pending FCF
                  * before rescan FCF record table.