[SCSI] lpfc 8.3.9: Discovery changes to the lpfc driver.

- Add init_vpi mailbox command before re-registering VPI.
- Add Fast FCF failover support.

Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

8 files changed, 821 insertions, 289 deletions

diff --git a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h
index 107899dc3f3e..a717f0be7120 100644
--- a/drivers/scsi/lpfc/lpfc_crtn.h
+++ b/drivers/scsi/lpfc/lpfc_crtn.h
@@ -78,6 +78,7 @@ void lpfc_set_disctmo(struct lpfc_vport *);
 int  lpfc_can_disctmo(struct lpfc_vport *);
 int  lpfc_unreg_rpi(struct lpfc_vport *, struct lpfc_nodelist *);
 void lpfc_unreg_all_rpis(struct lpfc_vport *);
+void lpfc_unreg_hba_rpis(struct lpfc_hba *);
 void lpfc_unreg_default_rpis(struct lpfc_vport *);
 void lpfc_issue_reg_vpi(struct lpfc_hba *, struct lpfc_vport *);
 
@@ -202,6 +203,7 @@ void lpfc_reg_fcfi(struct lpfc_hba *, struct lpfcMboxq *);
 void lpfc_unreg_fcfi(struct lpfcMboxq *, uint16_t);
 void lpfc_resume_rpi(struct lpfcMboxq *, struct lpfc_nodelist *);
 int lpfc_check_pending_fcoe_event(struct lpfc_hba *, uint8_t);
+void lpfc_issue_init_vpi(struct lpfc_vport *);
 
 void lpfc_config_hbq(struct lpfc_hba *, uint32_t, struct lpfc_hbq_init *,
         uint32_t , LPFC_MBOXQ_t *);
@@ -211,7 +213,11 @@ struct hbq_dmabuf *lpfc_sli4_rb_alloc(struct lpfc_hba *);
 void lpfc_sli4_rb_free(struct lpfc_hba *, struct hbq_dmabuf *);
 void lpfc_sli4_build_dflt_fcf_record(struct lpfc_hba *, struct fcf_record *,
                         uint16_t);
+void lpfc_unregister_fcf(struct lpfc_hba *);
+void lpfc_unregister_fcf_rescan(struct lpfc_hba *);
 void lpfc_unregister_unused_fcf(struct lpfc_hba *);
+int lpfc_sli4_redisc_fcf_table(struct lpfc_hba *);
+void lpfc_fcf_redisc_wait_start_timer(struct lpfc_hba *);
 
 int lpfc_mem_alloc(struct lpfc_hba *, int align);
 void lpfc_mem_free(struct lpfc_hba *);
@@ -370,6 +376,8 @@ void lpfc_free_fast_evt(struct lpfc_hba *, struct lpfc_fast_path_event *);
 void lpfc_create_static_vport(struct lpfc_hba *);
 void lpfc_stop_hba_timers(struct lpfc_hba *);
 void lpfc_stop_port(struct lpfc_hba *);
+void __lpfc_sli4_stop_fcf_redisc_wait_timer(struct lpfc_hba *);
+void lpfc_sli4_stop_fcf_redisc_wait_timer(struct lpfc_hba *);
 void lpfc_parse_fcoe_conf(struct lpfc_hba *, uint8_t *, uint32_t);
 int lpfc_parse_vpd(struct lpfc_hba *, uint8_t *, int);
 void lpfc_start_fdiscs(struct lpfc_hba *phba);
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 2c62349a1041..08b6634cb994 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -589,6 +589,15 @@ lpfc_cmpl_els_flogi_fabric(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
                         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
                         spin_unlock_irq(shost->host_lock);
                 }
+                /*
+                 * If VPI is unreged, driver need to do INIT_VPI
+                 * before re-registering
+                 */
+                if (phba->sli_rev == LPFC_SLI_REV4) {
+                        spin_lock_irq(shost->host_lock);
+                        vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
+                        spin_unlock_irq(shost->host_lock);
+                }
         }
 
         if (phba->sli_rev < LPFC_SLI_REV4) {
@@ -606,7 +615,7 @@ lpfc_cmpl_els_flogi_fabric(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
                         lpfc_start_fdiscs(phba);
                         lpfc_do_scr_ns_plogi(phba, vport);
                 } else if (vport->fc_flag & FC_VFI_REGISTERED)
-                        lpfc_register_new_vport(phba, vport, ndlp);
+                        lpfc_issue_init_vpi(vport);
                 else
                         lpfc_issue_reg_vfi(vport);
         }
@@ -6210,10 +6219,13 @@ lpfc_cmpl_els_fdisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
                 lpfc_mbx_unreg_vpi(vport);
                 spin_lock_irq(shost->host_lock);
                 vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
+                vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
                 spin_unlock_irq(shost->host_lock);
         }
 
-        if (vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)
+        if (vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI)
+                lpfc_issue_init_vpi(vport);
+        else if (vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)
                 lpfc_register_new_vport(phba, vport, ndlp);
         else
                 lpfc_do_scr_ns_plogi(phba, vport);
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index 7143d71c501f..b890e2dc15db 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -525,6 +525,8 @@ lpfc_work_done(struct lpfc_hba *phba)
                         spin_unlock_irq(&phba->hbalock);
                         lpfc_sli_hbqbuf_add_hbqs(phba, LPFC_ELS_HBQ);
                 }
+                if (phba->fcf.fcf_flag & FCF_REDISC_EVT)
+                        lpfc_sli4_fcf_redisc_event_proc(phba);
         }
 
         vports = lpfc_create_vport_work_array(phba);
@@ -754,7 +756,7 @@ lpfc_linkdown(struct lpfc_hba *phba)
         lpfc_scsi_dev_block(phba);
 
         spin_lock_irq(&phba->hbalock);
-        phba->fcf.fcf_flag &= ~(FCF_AVAILABLE | FCF_DISCOVERED);
+        phba->fcf.fcf_flag &= ~(FCF_AVAILABLE | FCF_SCAN_DONE);
         if (phba->link_state > LPFC_LINK_DOWN) {
                 phba->link_state = LPFC_LINK_DOWN;
                 phba->pport->fc_flag &= ~FC_LBIT;
@@ -1025,7 +1027,7 @@ lpfc_mbx_cmpl_reg_fcfi(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
                 return;
         }
         spin_lock_irqsave(&phba->hbalock, flags);
-        phba->fcf.fcf_flag |= (FCF_DISCOVERED | FCF_IN_USE);
+        phba->fcf.fcf_flag |= (FCF_SCAN_DONE | FCF_IN_USE);
         phba->hba_flag &= ~FCF_DISC_INPROGRESS;
         spin_unlock_irqrestore(&phba->hbalock, flags);
         if (vport->port_state != LPFC_FLOGI)
@@ -1047,25 +1049,23 @@ lpfc_mbx_cmpl_reg_fcfi(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
 static uint32_t
 lpfc_fab_name_match(uint8_t *fab_name, struct fcf_record *new_fcf_record)
 {
-        if ((fab_name[0] ==
-                bf_get(lpfc_fcf_record_fab_name_0, new_fcf_record)) &&
-            (fab_name[1] ==
-                bf_get(lpfc_fcf_record_fab_name_1, new_fcf_record)) &&
-            (fab_name[2] ==
-                bf_get(lpfc_fcf_record_fab_name_2, new_fcf_record)) &&
-            (fab_name[3] ==
-                bf_get(lpfc_fcf_record_fab_name_3, new_fcf_record)) &&
-            (fab_name[4] ==
-                bf_get(lpfc_fcf_record_fab_name_4, new_fcf_record)) &&
-            (fab_name[5] ==
-                bf_get(lpfc_fcf_record_fab_name_5, new_fcf_record)) &&
-            (fab_name[6] ==
-                bf_get(lpfc_fcf_record_fab_name_6, new_fcf_record)) &&
-            (fab_name[7] ==
-                bf_get(lpfc_fcf_record_fab_name_7, new_fcf_record)))
-                return 1;
-        else
+        if (fab_name[0] != bf_get(lpfc_fcf_record_fab_name_0, new_fcf_record))
+                return 0;
+        if (fab_name[1] != bf_get(lpfc_fcf_record_fab_name_1, new_fcf_record))
+                return 0;
+        if (fab_name[2] != bf_get(lpfc_fcf_record_fab_name_2, new_fcf_record))
+                return 0;
+        if (fab_name[3] != bf_get(lpfc_fcf_record_fab_name_3, new_fcf_record))
+                return 0;
+        if (fab_name[4] != bf_get(lpfc_fcf_record_fab_name_4, new_fcf_record))
+                return 0;
+        if (fab_name[5] != bf_get(lpfc_fcf_record_fab_name_5, new_fcf_record))
                 return 0;
+        if (fab_name[6] != bf_get(lpfc_fcf_record_fab_name_6, new_fcf_record))
+                return 0;
+        if (fab_name[7] != bf_get(lpfc_fcf_record_fab_name_7, new_fcf_record))
+                return 0;
+        return 1;
 }
 
 /**
@@ -1080,30 +1080,28 @@ lpfc_fab_name_match(uint8_t *fab_name, struct fcf_record *new_fcf_record)
 static uint32_t
 lpfc_sw_name_match(uint8_t *sw_name, struct fcf_record *new_fcf_record)
 {
-        if ((sw_name[0] ==
-                bf_get(lpfc_fcf_record_switch_name_0, new_fcf_record)) &&
-            (sw_name[1] ==
-                bf_get(lpfc_fcf_record_switch_name_1, new_fcf_record)) &&
-            (sw_name[2] ==
-                bf_get(lpfc_fcf_record_switch_name_2, new_fcf_record)) &&
-            (sw_name[3] ==
-                bf_get(lpfc_fcf_record_switch_name_3, new_fcf_record)) &&
-            (sw_name[4] ==
-                bf_get(lpfc_fcf_record_switch_name_4, new_fcf_record)) &&
-            (sw_name[5] ==
-                bf_get(lpfc_fcf_record_switch_name_5, new_fcf_record)) &&
-            (sw_name[6] ==
-                bf_get(lpfc_fcf_record_switch_name_6, new_fcf_record)) &&
-            (sw_name[7] ==
-                bf_get(lpfc_fcf_record_switch_name_7, new_fcf_record)))
-                return 1;
-        else
+        if (sw_name[0] != bf_get(lpfc_fcf_record_switch_name_0, new_fcf_record))
+                return 0;
+        if (sw_name[1] != bf_get(lpfc_fcf_record_switch_name_1, new_fcf_record))
+                return 0;
+        if (sw_name[2] != bf_get(lpfc_fcf_record_switch_name_2, new_fcf_record))
                 return 0;
+        if (sw_name[3] != bf_get(lpfc_fcf_record_switch_name_3, new_fcf_record))
+                return 0;
+        if (sw_name[4] != bf_get(lpfc_fcf_record_switch_name_4, new_fcf_record))
+                return 0;
+        if (sw_name[5] != bf_get(lpfc_fcf_record_switch_name_5, new_fcf_record))
+                return 0;
+        if (sw_name[6] != bf_get(lpfc_fcf_record_switch_name_6, new_fcf_record))
+                return 0;
+        if (sw_name[7] != bf_get(lpfc_fcf_record_switch_name_7, new_fcf_record))
+                return 0;
+        return 1;
 }
 
 /**
  * lpfc_mac_addr_match - Check if the fcf mac address match.
- * @phba: pointer to lpfc hba data structure.
+ * @mac_addr: pointer to mac address.
  * @new_fcf_record: pointer to fcf record.
  *
  * This routine compare the fcf record's mac address with HBA's
@@ -1111,85 +1109,115 @@ lpfc_sw_name_match(uint8_t *sw_name, struct fcf_record *new_fcf_record)
  * returns 1 else return 0.
  **/
 static uint32_t
-lpfc_mac_addr_match(struct lpfc_hba *phba, struct fcf_record *new_fcf_record)
+lpfc_mac_addr_match(uint8_t *mac_addr, struct fcf_record *new_fcf_record)
 {
-        if ((phba->fcf.mac_addr[0] ==
-                bf_get(lpfc_fcf_record_mac_0, new_fcf_record)) &&
-            (phba->fcf.mac_addr[1] ==
-                bf_get(lpfc_fcf_record_mac_1, new_fcf_record)) &&
-            (phba->fcf.mac_addr[2] ==
-                bf_get(lpfc_fcf_record_mac_2, new_fcf_record)) &&
-            (phba->fcf.mac_addr[3] ==
-                bf_get(lpfc_fcf_record_mac_3, new_fcf_record)) &&
-            (phba->fcf.mac_addr[4] ==
-                bf_get(lpfc_fcf_record_mac_4, new_fcf_record)) &&
-            (phba->fcf.mac_addr[5] ==
-                bf_get(lpfc_fcf_record_mac_5, new_fcf_record)))
-                return 1;
-        else
+        if (mac_addr[0] != bf_get(lpfc_fcf_record_mac_0, new_fcf_record))
+                return 0;
+        if (mac_addr[1] != bf_get(lpfc_fcf_record_mac_1, new_fcf_record))
+                return 0;
+        if (mac_addr[2] != bf_get(lpfc_fcf_record_mac_2, new_fcf_record))
+                return 0;
+        if (mac_addr[3] != bf_get(lpfc_fcf_record_mac_3, new_fcf_record))
+                return 0;
+        if (mac_addr[4] != bf_get(lpfc_fcf_record_mac_4, new_fcf_record))
+                return 0;
+        if (mac_addr[5] != bf_get(lpfc_fcf_record_mac_5, new_fcf_record))
                 return 0;
+        return 1;
+}
+
+static bool
+lpfc_vlan_id_match(uint16_t curr_vlan_id, uint16_t new_vlan_id)
+{
+        return (curr_vlan_id == new_vlan_id);
 }
 
 /**
  * lpfc_copy_fcf_record - Copy fcf information to lpfc_hba.
- * @phba: pointer to lpfc hba data structure.
+ * @fcf: pointer to driver fcf record.
  * @new_fcf_record: pointer to fcf record.
  *
  * This routine copies the FCF information from the FCF
  * record to lpfc_hba data structure.
  **/
 static void
-lpfc_copy_fcf_record(struct lpfc_hba *phba, struct fcf_record *new_fcf_record)
+lpfc_copy_fcf_record(struct lpfc_fcf_rec *fcf_rec,
+                     struct fcf_record *new_fcf_record)
 {
-        phba->fcf.fabric_name[0] =
+        /* Fabric name */
+        fcf_rec->fabric_name[0] =
                 bf_get(lpfc_fcf_record_fab_name_0, new_fcf_record);
-        phba->fcf.fabric_name[1] =
+        fcf_rec->fabric_name[1] =
                 bf_get(lpfc_fcf_record_fab_name_1, new_fcf_record);
-        phba->fcf.fabric_name[2] =
+        fcf_rec->fabric_name[2] =
                 bf_get(lpfc_fcf_record_fab_name_2, new_fcf_record);
-        phba->fcf.fabric_name[3] =
+        fcf_rec->fabric_name[3] =
                 bf_get(lpfc_fcf_record_fab_name_3, new_fcf_record);
-        phba->fcf.fabric_name[4] =
+        fcf_rec->fabric_name[4] =
                 bf_get(lpfc_fcf_record_fab_name_4, new_fcf_record);
-        phba->fcf.fabric_name[5] =
+        fcf_rec->fabric_name[5] =
                 bf_get(lpfc_fcf_record_fab_name_5, new_fcf_record);
-        phba->fcf.fabric_name[6] =
+        fcf_rec->fabric_name[6] =
                 bf_get(lpfc_fcf_record_fab_name_6, new_fcf_record);
-        phba->fcf.fabric_name[7] =
+        fcf_rec->fabric_name[7] =
                 bf_get(lpfc_fcf_record_fab_name_7, new_fcf_record);
-        phba->fcf.mac_addr[0] =
-                bf_get(lpfc_fcf_record_mac_0, new_fcf_record);
-        phba->fcf.mac_addr[1] =
-                bf_get(lpfc_fcf_record_mac_1, new_fcf_record);
-        phba->fcf.mac_addr[2] =
-                bf_get(lpfc_fcf_record_mac_2, new_fcf_record);
-        phba->fcf.mac_addr[3] =
-                bf_get(lpfc_fcf_record_mac_3, new_fcf_record);
-        phba->fcf.mac_addr[4] =
-                bf_get(lpfc_fcf_record_mac_4, new_fcf_record);
-        phba->fcf.mac_addr[5] =
-                bf_get(lpfc_fcf_record_mac_5, new_fcf_record);
-        phba->fcf.fcf_indx = bf_get(lpfc_fcf_record_fcf_index, new_fcf_record);
-        phba->fcf.priority = new_fcf_record->fip_priority;
-        phba->fcf.switch_name[0] =
+        /* Mac address */
+        fcf_rec->mac_addr[0] = bf_get(lpfc_fcf_record_mac_0, new_fcf_record);
+        fcf_rec->mac_addr[1] = bf_get(lpfc_fcf_record_mac_1, new_fcf_record);
+        fcf_rec->mac_addr[2] = bf_get(lpfc_fcf_record_mac_2, new_fcf_record);
+        fcf_rec->mac_addr[3] = bf_get(lpfc_fcf_record_mac_3, new_fcf_record);
+        fcf_rec->mac_addr[4] = bf_get(lpfc_fcf_record_mac_4, new_fcf_record);
+        fcf_rec->mac_addr[5] = bf_get(lpfc_fcf_record_mac_5, new_fcf_record);
+        /* FCF record index */
+        fcf_rec->fcf_indx = bf_get(lpfc_fcf_record_fcf_index, new_fcf_record);
+        /* FCF record priority */
+        fcf_rec->priority = new_fcf_record->fip_priority;
+        /* Switch name */
+        fcf_rec->switch_name[0] =
                 bf_get(lpfc_fcf_record_switch_name_0, new_fcf_record);
-        phba->fcf.switch_name[1] =
+        fcf_rec->switch_name[1] =
                 bf_get(lpfc_fcf_record_switch_name_1, new_fcf_record);
-        phba->fcf.switch_name[2] =
+        fcf_rec->switch_name[2] =
                 bf_get(lpfc_fcf_record_switch_name_2, new_fcf_record);
-        phba->fcf.switch_name[3] =
+        fcf_rec->switch_name[3] =
                 bf_get(lpfc_fcf_record_switch_name_3, new_fcf_record);
-        phba->fcf.switch_name[4] =
+        fcf_rec->switch_name[4] =
                 bf_get(lpfc_fcf_record_switch_name_4, new_fcf_record);
-        phba->fcf.switch_name[5] =
+        fcf_rec->switch_name[5] =
                 bf_get(lpfc_fcf_record_switch_name_5, new_fcf_record);
-        phba->fcf.switch_name[6] =
+        fcf_rec->switch_name[6] =
                 bf_get(lpfc_fcf_record_switch_name_6, new_fcf_record);
-        phba->fcf.switch_name[7] =
+        fcf_rec->switch_name[7] =
                 bf_get(lpfc_fcf_record_switch_name_7, new_fcf_record);
 }
 
 /**
+ * lpfc_update_fcf_record - Update driver fcf record
+ * @phba: pointer to lpfc hba data structure.
+ * @fcf_rec: pointer to driver fcf record.
+ * @new_fcf_record: pointer to hba fcf record.
+ * @addr_mode: address mode to be set to the driver fcf record.
+ * @vlan_id: vlan tag to be set to the driver fcf record.
+ * @flag: flag bits to be set to the driver fcf record.
+ *
+ * This routine updates the driver FCF record from the new HBA FCF record
+ * together with the address mode, vlan_id, and other informations. This
+ * routine is called with the host lock held.
+ **/
+static void
+__lpfc_update_fcf_record(struct lpfc_hba *phba, struct lpfc_fcf_rec *fcf_rec,
+                       struct fcf_record *new_fcf_record, uint32_t addr_mode,
+                       uint16_t vlan_id, uint32_t flag)
+{
+        /* Copy the fields from the HBA's FCF record */
+        lpfc_copy_fcf_record(fcf_rec, new_fcf_record);
+        /* Update other fields of driver FCF record */
+        fcf_rec->addr_mode = addr_mode;
+        fcf_rec->vlan_id = vlan_id;
+        fcf_rec->flag |= (flag | RECORD_VALID);
+}
+
+/**
  * lpfc_register_fcf - Register the FCF with hba.
  * @phba: pointer to lpfc hba data structure.
  *
@@ -1214,7 +1242,7 @@ lpfc_register_fcf(struct lpfc_hba *phba)
 
         /* The FCF is already registered, start discovery */
         if (phba->fcf.fcf_flag & FCF_REGISTERED) {
-                phba->fcf.fcf_flag |= (FCF_DISCOVERED | FCF_IN_USE);
+                phba->fcf.fcf_flag |= (FCF_SCAN_DONE | FCF_IN_USE);
                 phba->hba_flag &= ~FCF_DISC_INPROGRESS;
                 spin_unlock_irqrestore(&phba->hbalock, flags);
                 if (phba->pport->port_state != LPFC_FLOGI)
@@ -1252,6 +1280,7 @@ lpfc_register_fcf(struct lpfc_hba *phba)
  * @new_fcf_record: pointer to fcf record.
  * @boot_flag: Indicates if this record used by boot bios.
  * @addr_mode: The address mode to be used by this FCF
+ * @vlan_id: The vlan id to be used as vlan tagging by this FCF.
  *
  * This routine compare the fcf record with connect list obtained from the
  * config region to decide if this FCF can be used for SAN discovery. It returns
@@ -1325,7 +1354,8 @@ lpfc_match_fcf_conn_list(struct lpfc_hba *phba,
                 return 1;
         }
 
-        list_for_each_entry(conn_entry, &phba->fcf_conn_rec_list, list) {
+        list_for_each_entry(conn_entry,
+                            &phba->fcf_conn_rec_list, list) {
                 if (!(conn_entry->conn_rec.flags & FCFCNCT_VALID))
                         continue;
 
@@ -1472,6 +1502,7 @@ lpfc_check_pending_fcoe_event(struct lpfc_hba *phba, uint8_t unreg_fcf)
                  */
                 spin_lock_irq(&phba->hbalock);
                 phba->hba_flag &= ~FCF_DISC_INPROGRESS;
+                phba->fcf.fcf_flag &= ~FCF_REDISC_FOV;
                 spin_unlock_irq(&phba->hbalock);
         }
 
@@ -1526,11 +1557,12 @@ lpfc_mbx_cmpl_read_fcf_record(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
         uint32_t shdr_status, shdr_add_status;
         union lpfc_sli4_cfg_shdr *shdr;
         struct fcf_record *new_fcf_record;
-        int rc;
         uint32_t boot_flag, addr_mode;
         uint32_t next_fcf_index;
-        unsigned long flags;
+        struct lpfc_fcf_rec *fcf_rec = NULL;
+        unsigned long iflags;
         uint16_t vlan_id;
+        int rc;
 
         /* If there is pending FCoE event restart FCF table scan */
         if (lpfc_check_pending_fcoe_event(phba, 0)) {
@@ -1585,9 +1617,8 @@ lpfc_mbx_cmpl_read_fcf_record(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
                               sizeof(struct fcf_record));
         bytep = virt_addr + sizeof(union lpfc_sli4_cfg_shdr);
 
-        rc = lpfc_match_fcf_conn_list(phba, new_fcf_record,
-                                      &boot_flag, &addr_mode,
-                                        &vlan_id);
+        rc = lpfc_match_fcf_conn_list(phba, new_fcf_record, &boot_flag,
+                                      &addr_mode, &vlan_id);
         /*
          * If the fcf record does not match with connect list entries
          * read the next entry.
@@ -1596,90 +1627,159 @@ lpfc_mbx_cmpl_read_fcf_record(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
                 goto read_next_fcf;
         /*
          * If this is not the first FCF discovery of the HBA, use last
-         * FCF record for the discovery.
+         * FCF record for the discovery. The condition that a rescan
+         * matches the in-use FCF record: fabric name, switch name, mac
+         * address, and vlan_id.
          */
-        spin_lock_irqsave(&phba->hbalock, flags);
+        spin_lock_irqsave(&phba->hbalock, iflags);
         if (phba->fcf.fcf_flag & FCF_IN_USE) {
-                if (lpfc_fab_name_match(phba->fcf.fabric_name,
+                if (lpfc_fab_name_match(phba->fcf.current_rec.fabric_name,
                                         new_fcf_record) &&
-                    lpfc_sw_name_match(phba->fcf.switch_name,
+                    lpfc_sw_name_match(phba->fcf.current_rec.switch_name,
                                         new_fcf_record) &&
-                    lpfc_mac_addr_match(phba, new_fcf_record)) {
+                    lpfc_mac_addr_match(phba->fcf.current_rec.mac_addr,
+                                        new_fcf_record) &&
+                    lpfc_vlan_id_match(phba->fcf.current_rec.vlan_id,
+                                        vlan_id)) {
                         phba->fcf.fcf_flag |= FCF_AVAILABLE;
-                        spin_unlock_irqrestore(&phba->hbalock, flags);
+                        if (phba->fcf.fcf_flag & FCF_REDISC_PEND)
+                                /* Stop FCF redisc wait timer if pending */
+                                __lpfc_sli4_stop_fcf_redisc_wait_timer(phba);
+                        else if (phba->fcf.fcf_flag & FCF_REDISC_FOV)
+                                /* If in fast failover, mark it's completed */
+                                phba->fcf.fcf_flag &= ~FCF_REDISC_FOV;
+                        spin_unlock_irqrestore(&phba->hbalock, iflags);
                         goto out;
                 }
-                spin_unlock_irqrestore(&phba->hbalock, flags);
-                goto read_next_fcf;
+                /*
+                 * Read next FCF record from HBA searching for the matching
+                 * with in-use record only if not during the fast failover
+                 * period. In case of fast failover period, it shall try to
+                 * determine whether the FCF record just read should be the
+                 * next candidate.
+                 */
+                if (!(phba->fcf.fcf_flag & FCF_REDISC_FOV)) {
+                        spin_unlock_irqrestore(&phba->hbalock, iflags);
+                        goto read_next_fcf;
+                }
         }
+        /*
+         * Update on failover FCF record only if it's in FCF fast-failover
+         * period; otherwise, update on current FCF record.
+         */
+        if (phba->fcf.fcf_flag & FCF_REDISC_FOV) {
+                /* Fast FCF failover only to the same fabric name */
+                if (lpfc_fab_name_match(phba->fcf.current_rec.fabric_name,
+                                        new_fcf_record))
+                        fcf_rec = &phba->fcf.failover_rec;
+                else
+                        goto read_next_fcf;
+        } else
+                fcf_rec = &phba->fcf.current_rec;
+
         if (phba->fcf.fcf_flag & FCF_AVAILABLE) {
                 /*
-                 * If the current FCF record does not have boot flag
-                 * set and new fcf record has boot flag set, use the
-                 * new fcf record.
+                 * If the driver FCF record does not have boot flag
+                 * set and new hba fcf record has boot flag set, use
+                 * the new hba fcf record.
                  */
-                if (boot_flag && !(phba->fcf.fcf_flag & FCF_BOOT_ENABLE)) {
-                        /* Use this FCF record */
-                        lpfc_copy_fcf_record(phba, new_fcf_record);
-                        phba->fcf.addr_mode = addr_mode;
-                        phba->fcf.fcf_flag |= FCF_BOOT_ENABLE;
-                        if (vlan_id != 0xFFFF) {
-                                phba->fcf.fcf_flag |= FCF_VALID_VLAN;
-                                phba->fcf.vlan_id = vlan_id;
-                        }
-                        spin_unlock_irqrestore(&phba->hbalock, flags);
+                if (boot_flag && !(fcf_rec->flag & BOOT_ENABLE)) {
+                        /* Choose this FCF record */
+                        __lpfc_update_fcf_record(phba, fcf_rec, new_fcf_record,
+                                        addr_mode, vlan_id, BOOT_ENABLE);
+                        spin_unlock_irqrestore(&phba->hbalock, iflags);
                         goto read_next_fcf;
                 }
                 /*
-                 * If the current FCF record has boot flag set and the
-                 * new FCF record does not have boot flag, read the next
-                 * FCF record.
+                 * If the driver FCF record has boot flag set and the
+                 * new hba FCF record does not have boot flag, read
+                 * the next FCF record.
                  */
-                if (!boot_flag && (phba->fcf.fcf_flag & FCF_BOOT_ENABLE)) {
-                        spin_unlock_irqrestore(&phba->hbalock, flags);
+                if (!boot_flag && (fcf_rec->flag & BOOT_ENABLE)) {
+                        spin_unlock_irqrestore(&phba->hbalock, iflags);
                         goto read_next_fcf;
                 }
                 /*
-                 * If there is a record with lower priority value for
-                 * the current FCF, use that record.
+                 * If the new hba FCF record has lower priority value
+                 * than the driver FCF record, use the new record.
                  */
-                if (lpfc_fab_name_match(phba->fcf.fabric_name,
-                                        new_fcf_record) &&
-                    (new_fcf_record->fip_priority < phba->fcf.priority)) {
-                        /* Use this FCF record */
-                        lpfc_copy_fcf_record(phba, new_fcf_record);
-                        phba->fcf.addr_mode = addr_mode;
-                        if (vlan_id != 0xFFFF) {
-                                phba->fcf.fcf_flag |= FCF_VALID_VLAN;
-                                phba->fcf.vlan_id = vlan_id;
-                        }
-                        spin_unlock_irqrestore(&phba->hbalock, flags);
-                        goto read_next_fcf;
+                if (lpfc_fab_name_match(fcf_rec->fabric_name, new_fcf_record) &&
+                    (new_fcf_record->fip_priority < fcf_rec->priority)) {
+                        /* Choose this FCF record */
+                        __lpfc_update_fcf_record(phba, fcf_rec, new_fcf_record,
+                                        addr_mode, vlan_id, 0);
                 }
-                spin_unlock_irqrestore(&phba->hbalock, flags);
+                spin_unlock_irqrestore(&phba->hbalock, iflags);
                 goto read_next_fcf;
         }
         /*
-         * This is the first available FCF record, use this
-         * record.
+         * This is the first suitable FCF record, choose this record for
+         * initial best-fit FCF.
          */
-        lpfc_copy_fcf_record(phba, new_fcf_record);
-        phba->fcf.addr_mode = addr_mode;
-        if (boot_flag)
-                phba->fcf.fcf_flag |= FCF_BOOT_ENABLE;
-        phba->fcf.fcf_flag |= FCF_AVAILABLE;
-        if (vlan_id != 0xFFFF) {
-                phba->fcf.fcf_flag |= FCF_VALID_VLAN;
-                phba->fcf.vlan_id = vlan_id;
+        if (fcf_rec) {
+                __lpfc_update_fcf_record(phba, fcf_rec, new_fcf_record,
+                                         addr_mode, vlan_id, (boot_flag ?
+                                         BOOT_ENABLE : 0));
+                phba->fcf.fcf_flag |= FCF_AVAILABLE;
         }
-        spin_unlock_irqrestore(&phba->hbalock, flags);
+        spin_unlock_irqrestore(&phba->hbalock, iflags);
         goto read_next_fcf;
 
 read_next_fcf:
         lpfc_sli4_mbox_cmd_free(phba, mboxq);
-        if (next_fcf_index == LPFC_FCOE_FCF_NEXT_NONE || next_fcf_index == 0)
-                lpfc_register_fcf(phba);
-        else
+        if (next_fcf_index == LPFC_FCOE_FCF_NEXT_NONE || next_fcf_index == 0) {
+                if (phba->fcf.fcf_flag & FCF_REDISC_FOV) {
+                        /*
+                         * Case of FCF fast failover scan
+                         */
+
+                        /*
+                         * It has not found any suitable FCF record, cancel
+                         * FCF scan inprogress, and do nothing
+                         */
+                        if (!(phba->fcf.failover_rec.flag & RECORD_VALID)) {
+                                spin_lock_irqsave(&phba->hbalock, iflags);
+                                phba->hba_flag &= ~FCF_DISC_INPROGRESS;
+                                spin_unlock_irqrestore(&phba->hbalock, iflags);
+                                return;
+                        }
+                        /*
+                         * It has found a suitable FCF record that is not
+                         * the same as in-use FCF record, unregister the
+                         * in-use FCF record, replace the in-use FCF record
+                         * with the new FCF record, mark FCF fast failover
+                         * completed, and then start register the new FCF
+                         * record.
+                         */
+
+                        /* unregister the current in-use FCF record */
+                        lpfc_unregister_fcf(phba);
+                        /* replace in-use record with the new record */
+                        memcpy(&phba->fcf.current_rec,
+                               &phba->fcf.failover_rec,
+                               sizeof(struct lpfc_fcf_rec));
+                        /* mark the FCF fast failover completed */
+                        spin_lock_irqsave(&phba->hbalock, iflags);
+                        phba->fcf.fcf_flag &= ~FCF_REDISC_FOV;
+                        spin_unlock_irqrestore(&phba->hbalock, iflags);
+                        /* Register to the new FCF record */
+                        lpfc_register_fcf(phba);
+                } else {
+                        /*
+                         * In case of transaction period to fast FCF failover,
+                         * do nothing when search to the end of the FCF table.
+                         */
+                        if ((phba->fcf.fcf_flag & FCF_REDISC_EVT) ||
+                            (phba->fcf.fcf_flag & FCF_REDISC_PEND))
+                                return;
+                        /*
+                         * Otherwise, initial scan or post linkdown rescan,
+                         * register with the best fit FCF record found so
+                         * far through the scanning process.
+                         */
+                        lpfc_register_fcf(phba);
+                }
+        } else
                 lpfc_sli4_read_fcf_record(phba, next_fcf_index);
         return;
 
@@ -1741,6 +1841,37 @@ lpfc_init_vpi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
 }
 
 /**
+ * lpfc_issue_init_vpi - Issue init_vpi mailbox command.
+ * @vport: pointer to lpfc_vport data structure.
+ *
+ * This function issue a init_vpi mailbox command to initialize
+ * VPI for the vport.
+ */
+void
+lpfc_issue_init_vpi(struct lpfc_vport *vport)
+{
+        LPFC_MBOXQ_t *mboxq;
+        int rc;
+
+        mboxq = mempool_alloc(vport->phba->mbox_mem_pool, GFP_KERNEL);
+        if (!mboxq) {
+                lpfc_printf_vlog(vport, KERN_ERR,
+                        LOG_MBOX, "2607 Failed to allocate "
+                        "init_vpi mailbox\n");
+                return;
+        }
+        lpfc_init_vpi(vport->phba, mboxq, vport->vpi);
+        mboxq->vport = vport;
+        mboxq->mbox_cmpl = lpfc_init_vpi_cmpl;
+        rc = lpfc_sli_issue_mbox(vport->phba, mboxq, MBX_NOWAIT);
+        if (rc == MBX_NOT_FINISHED) {
+                lpfc_printf_vlog(vport, KERN_ERR,
+                        LOG_MBOX, "2608 Failed to issue init_vpi mailbox\n");
+                mempool_free(mboxq, vport->phba->mbox_mem_pool);
+        }
+}
+
+/**
  * lpfc_start_fdiscs - send fdiscs for each vports on this port.
  * @phba: pointer to lpfc hba data structure.
  *
@@ -1752,8 +1883,6 @@ lpfc_start_fdiscs(struct lpfc_hba *phba)
 {
         struct lpfc_vport **vports;
         int i;
-        LPFC_MBOXQ_t *mboxq;
-        int rc;
 
         vports = lpfc_create_vport_work_array(phba);
         if (vports != NULL) {
@@ -1772,26 +1901,7 @@ lpfc_start_fdiscs(struct lpfc_hba *phba)
                                 continue;
                         }
                         if (vports[i]->fc_flag & FC_VPORT_NEEDS_INIT_VPI) {
-                                mboxq = mempool_alloc(phba->mbox_mem_pool,
-                                        GFP_KERNEL);
-                                if (!mboxq) {
-                                        lpfc_printf_vlog(vports[i], KERN_ERR,
-                                        LOG_MBOX, "2607 Failed to allocate "
-                                        "init_vpi mailbox\n");
-                                        continue;
-                                }
-                                lpfc_init_vpi(phba, mboxq, vports[i]->vpi);
-                                mboxq->vport = vports[i];
-                                mboxq->mbox_cmpl = lpfc_init_vpi_cmpl;
-                                rc = lpfc_sli_issue_mbox(phba, mboxq,
-                                        MBX_NOWAIT);
-                                if (rc == MBX_NOT_FINISHED) {
-                                        lpfc_printf_vlog(vports[i], KERN_ERR,
-                                        LOG_MBOX, "2608 Failed to issue "
-                                        "init_vpi mailbox\n");
-                                        mempool_free(mboxq,
-                                                phba->mbox_mem_pool);
-                                }
+                                lpfc_issue_init_vpi(vports[i]);
                                 continue;
                         }
                         if (phba->link_flag & LS_NPIV_FAB_SUPPORTED)
@@ -2071,8 +2181,7 @@ lpfc_mbx_process_link_up(struct lpfc_hba *phba, READ_LA_VAR *la)
                         return;
                 }
                 spin_unlock_irq(&phba->hbalock);
-                rc = lpfc_sli4_read_fcf_record(phba,
-                                        LPFC_FCOE_FCF_GET_FIRST);
+                rc = lpfc_sli4_read_fcf_record(phba, LPFC_FCOE_FCF_GET_FIRST);
                 if (rc)
                         goto out;
         }
@@ -3240,6 +3349,34 @@ lpfc_unreg_rpi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
         return 0;
 }
 
+/**
+ * lpfc_unreg_hba_rpis - Unregister rpis registered to the hba.
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine is invoked to unregister all the currently registered RPIs
+ * to the HBA.
+ **/
+void
+lpfc_unreg_hba_rpis(struct lpfc_hba *phba)
+{
+        struct lpfc_vport **vports;
+        struct lpfc_nodelist *ndlp;
+        struct Scsi_Host *shost;
+        int i;
+
+        vports = lpfc_create_vport_work_array(phba);
+        for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
+                shost = lpfc_shost_from_vport(vports[i]);
+                spin_lock_irq(shost->host_lock);
+                list_for_each_entry(ndlp, &vports[i]->fc_nodes, nlp_listp) {
+                        if (ndlp->nlp_flag & NLP_RPI_VALID)
+                                lpfc_unreg_rpi(vports[i], ndlp);
+                }
+                spin_unlock_irq(shost->host_lock);
+        }
+        lpfc_destroy_vport_work_array(phba, vports);
+}
+
 void
 lpfc_unreg_all_rpis(struct lpfc_vport *vport)
 {
@@ -4470,47 +4607,31 @@ lpfc_unregister_fcfi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
 }
 
 /**
- * lpfc_unregister_unused_fcf - Unregister FCF if all devices are disconnected.
+ * lpfc_unregister_fcf_prep - Unregister fcf record preparation
  * @phba: Pointer to hba context object.
  *
- * This function check if there are any connected remote port for the FCF and
- * if all the devices are disconnected, this function unregister FCFI.
- * This function also tries to use another FCF for discovery.
+ * This function prepare the HBA for unregistering the currently registered
+ * FCF from the HBA. It performs unregistering, in order, RPIs, VPIs, and
+ * VFIs.
  */
-void
-lpfc_unregister_unused_fcf(struct lpfc_hba *phba)
+int
+lpfc_unregister_fcf_prep(struct lpfc_hba *phba)
 {
         LPFC_MBOXQ_t *mbox;
-        int rc;
         struct lpfc_vport **vports;
-        int i;
         struct lpfc_nodelist *ndlp;
+        int i, rc;
 
-        spin_lock_irq(&phba->hbalock);
-        /*
-         * If HBA is not running in FIP mode or
-         * If HBA does not support FCoE or
-         * If FCF is not registered.
-         * do nothing.
-         */
-        if (!(phba->hba_flag & HBA_FCOE_SUPPORT) ||
-                !(phba->fcf.fcf_flag & FCF_REGISTERED) ||
-                (!(phba->hba_flag & HBA_FIP_SUPPORT))) {
-                spin_unlock_irq(&phba->hbalock);
-                return;
-        }
-        spin_unlock_irq(&phba->hbalock);
-
+        /* Unregister RPIs */
         if (lpfc_fcf_inuse(phba))
-                return;
+                lpfc_unreg_hba_rpis(phba);
 
         /* At this point, all discovery is aborted */
         phba->pport->port_state = LPFC_VPORT_UNKNOWN;
 
         /* Unregister VPIs */
         vports = lpfc_create_vport_work_array(phba);
-        if (vports &&
-                (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED))
+        if (vports && (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED))
                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
                         /* Stop FLOGI/FDISC retries */
                         ndlp = lpfc_findnode_did(vports[i], Fabric_DID);
@@ -4531,10 +4652,9 @@ lpfc_unregister_unused_fcf(struct lpfc_hba *phba)
         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
         if (!mbox) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY|LOG_MBOX,
-                        "2556 UNREG_VFI mbox allocation failed"
-                        "HBA state x%x\n",
-                        phba->pport->port_state);
-                return;
+                                "2556 UNREG_VFI mbox allocation failed"
+                                "HBA state x%x\n", phba->pport->port_state);
+                return -ENOMEM;
         }
 
         lpfc_unreg_vfi(mbox, phba->pport);
@@ -4544,62 +4664,162 @@ lpfc_unregister_unused_fcf(struct lpfc_hba *phba)
         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
         if (rc == MBX_NOT_FINISHED) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY|LOG_MBOX,
-                        "2557 UNREG_VFI issue mbox failed rc x%x "
-                        "HBA state x%x\n",
-                        rc, phba->pport->port_state);
+                                "2557 UNREG_VFI issue mbox failed rc x%x "
+                                "HBA state x%x\n",
+                                rc, phba->pport->port_state);
                 mempool_free(mbox, phba->mbox_mem_pool);
-                return;
+                return -EIO;
         }
 
         spin_lock_irq(&phba->hbalock);
         phba->pport->fc_flag &= ~FC_VFI_REGISTERED;
         spin_unlock_irq(&phba->hbalock);
 
-        /* Unregister FCF */
+        return 0;
+}
+
+/**
+ * lpfc_sli4_unregister_fcf - Unregister currently registered FCF record
+ * @phba: Pointer to hba context object.
+ *
+ * This function issues synchronous unregister FCF mailbox command to HBA to
+ * unregister the currently registered FCF record. The driver does not reset
+ * the driver FCF usage state flags.
+ *
+ * Return 0 if successfully issued, none-zero otherwise.
+ */
+int
+lpfc_sli4_unregister_fcf(struct lpfc_hba *phba)
+{
+        LPFC_MBOXQ_t *mbox;
+        int rc;
+
         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
         if (!mbox) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY|LOG_MBOX,
-                        "2551 UNREG_FCFI mbox allocation failed"
-                        "HBA state x%x\n",
-                        phba->pport->port_state);
-                return;
+                                "2551 UNREG_FCFI mbox allocation failed"
+                                "HBA state x%x\n", phba->pport->port_state);
+                return -ENOMEM;
         }
-
         lpfc_unreg_fcfi(mbox, phba->fcf.fcfi);
         mbox->vport = phba->pport;
         mbox->mbox_cmpl = lpfc_unregister_fcfi_cmpl;
         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 
         if (rc == MBX_NOT_FINISHED) {
-                lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY|LOG_MBOX,
-                        "2552 UNREG_FCFI issue mbox failed rc x%x "
-                        "HBA state x%x\n",
-                        rc, phba->pport->port_state);
-                mempool_free(mbox, phba->mbox_mem_pool);
+                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
+                                "2552 Unregister FCFI command failed rc x%x "
+                                "HBA state x%x\n",
+                                rc, phba->pport->port_state);
+                return -EINVAL;
+        }
+        return 0;
+}
+
+/**
+ * lpfc_unregister_fcf_rescan - Unregister currently registered fcf and rescan
+ * @phba: Pointer to hba context object.
+ *
+ * This function unregisters the currently reigstered FCF. This function
+ * also tries to find another FCF for discovery by rescan the HBA FCF table.
+ */
+void
+lpfc_unregister_fcf_rescan(struct lpfc_hba *phba)
+{
+        int rc;
+
+        /* Preparation for unregistering fcf */
+        rc = lpfc_unregister_fcf_prep(phba);
+        if (rc) {
+                lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
+                                "2748 Failed to prepare for unregistering "
+                                "HBA's FCF record: rc=%d\n", rc);
                 return;
         }
 
-        spin_lock_irq(&phba->hbalock);
-        phba->fcf.fcf_flag &= ~(FCF_AVAILABLE | FCF_REGISTERED |
-                FCF_DISCOVERED | FCF_BOOT_ENABLE | FCF_IN_USE |
-                FCF_VALID_VLAN);
-        spin_unlock_irq(&phba->hbalock);
+        /* Now, unregister FCF record and reset HBA FCF state */
+        rc = lpfc_sli4_unregister_fcf(phba);
+        if (rc)
+                return;
+        /* Reset HBA FCF states after successful unregister FCF */
+        phba->fcf.fcf_flag = 0;
 
         /*
          * If driver is not unloading, check if there is any other
          * FCF record that can be used for discovery.
          */
         if ((phba->pport->load_flag & FC_UNLOADING) ||
-                (phba->link_state < LPFC_LINK_UP))
+            (phba->link_state < LPFC_LINK_UP))
                 return;
 
         rc = lpfc_sli4_read_fcf_record(phba, LPFC_FCOE_FCF_GET_FIRST);
 
         if (rc)
                 lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY|LOG_MBOX,
-                        "2553 lpfc_unregister_unused_fcf failed to read FCF"
-                        " record HBA state x%x\n",
-                        phba->pport->port_state);
+                                "2553 lpfc_unregister_unused_fcf failed "
+                                "to read FCF record HBA state x%x\n",
+                                phba->pport->port_state);
+}
+
+/**
+ * lpfc_unregister_fcf - Unregister the currently registered fcf record
+ * @phba: Pointer to hba context object.
+ *
+ * This function just unregisters the currently reigstered FCF. It does not
+ * try to find another FCF for discovery.
+ */
+void
+lpfc_unregister_fcf(struct lpfc_hba *phba)
+{
+        int rc;
+
+        /* Preparation for unregistering fcf */
+        rc = lpfc_unregister_fcf_prep(phba);
+        if (rc) {
+                lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
+                                "2749 Failed to prepare for unregistering "
+                                "HBA's FCF record: rc=%d\n", rc);
+                return;
+        }
+
+        /* Now, unregister FCF record and reset HBA FCF state */
+        rc = lpfc_sli4_unregister_fcf(phba);
+        if (rc)
+                return;
+        /* Set proper HBA FCF states after successful unregister FCF */
+        spin_lock_irq(&phba->hbalock);
+        phba->fcf.fcf_flag &= ~FCF_REGISTERED;
+        spin_unlock_irq(&phba->hbalock);
+}
+
+/**
+ * lpfc_unregister_unused_fcf - Unregister FCF if all devices are disconnected.
+ * @phba: Pointer to hba context object.
+ *
+ * This function check if there are any connected remote port for the FCF and
+ * if all the devices are disconnected, this function unregister FCFI.
+ * This function also tries to use another FCF for discovery.
+ */
+void
+lpfc_unregister_unused_fcf(struct lpfc_hba *phba)
+{
+        /*
+         * If HBA is not running in FIP mode or if HBA does not support
+         * FCoE or if FCF is not registered, do nothing.
+         */
+        spin_lock_irq(&phba->hbalock);
+        if (!(phba->hba_flag & HBA_FCOE_SUPPORT) ||
+            !(phba->fcf.fcf_flag & FCF_REGISTERED) ||
+            !(phba->hba_flag & HBA_FIP_SUPPORT)) {
+                spin_unlock_irq(&phba->hbalock);
+                return;
+        }
+        spin_unlock_irq(&phba->hbalock);
+
+        if (lpfc_fcf_inuse(phba))
+                return;
+
+        lpfc_unregister_fcf_rescan(phba);
 }
 
 /**
diff --git a/drivers/scsi/lpfc/lpfc_hw4.h b/drivers/scsi/lpfc/lpfc_hw4.h
index ae0c53dba845..999e49f6071e 100644
--- a/drivers/scsi/lpfc/lpfc_hw4.h
+++ b/drivers/scsi/lpfc/lpfc_hw4.h
@@ -797,6 +797,7 @@ struct mbox_header {
 #define LPFC_MBOX_OPCODE_FCOE_ADD_FCF                   0x09
 #define LPFC_MBOX_OPCODE_FCOE_DELETE_FCF                0x0A
 #define LPFC_MBOX_OPCODE_FCOE_POST_HDR_TEMPLATE         0x0B
+#define LPFC_MBOX_OPCODE_FCOE_REDISCOVER_FCF            0x10
 
 /* Mailbox command structures */
 struct eq_context {
@@ -1297,6 +1298,19 @@ struct lpfc_mbx_del_fcf_tbl_entry {
 #define lpfc_mbx_del_fcf_tbl_index_WORD         word10
 };
 
+struct lpfc_mbx_redisc_fcf_tbl {
+        struct mbox_header header;
+        uint32_t word10;
+#define lpfc_mbx_redisc_fcf_count_SHIFT         0
+#define lpfc_mbx_redisc_fcf_count_MASK          0x0000FFFF
+#define lpfc_mbx_redisc_fcf_count_WORD          word10
+        uint32_t resvd;
+        uint32_t word12;
+#define lpfc_mbx_redisc_fcf_index_SHIFT         0
+#define lpfc_mbx_redisc_fcf_index_MASK          0x0000FFFF
+#define lpfc_mbx_redisc_fcf_index_WORD          word12
+};
+
 struct lpfc_mbx_query_fw_cfg {
         struct mbox_header header;
         uint32_t config_number;
@@ -1859,6 +1873,7 @@ struct lpfc_mqe {
                 struct lpfc_mbx_read_fcf_tbl read_fcf_tbl;
                 struct lpfc_mbx_add_fcf_tbl_entry add_fcf_entry;
                 struct lpfc_mbx_del_fcf_tbl_entry del_fcf_entry;
+                struct lpfc_mbx_redisc_fcf_tbl redisc_fcf_tbl;
                 struct lpfc_mbx_reg_fcfi reg_fcfi;
                 struct lpfc_mbx_unreg_fcfi unreg_fcfi;
                 struct lpfc_mbx_mq_create mq_create;
@@ -1975,6 +1990,7 @@ struct lpfc_acqe_fcoe {
 #define LPFC_FCOE_EVENT_TYPE_FCF_TABLE_FULL     0x2
 #define LPFC_FCOE_EVENT_TYPE_FCF_DEAD           0x3
 #define LPFC_FCOE_EVENT_TYPE_CVL                0x4
+#define LPFC_FCOE_EVENT_TYPE_FCF_PARAM_MOD      0x5
         uint32_t event_tag;
         uint32_t trailer;
 };
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 25a97dfd4ea7..6e04679167e3 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -2073,6 +2073,44 @@ lpfc_stop_vport_timers(struct lpfc_vport *vport)
 }
 
 /**
+ * __lpfc_sli4_stop_fcf_redisc_wait_timer - Stop FCF rediscovery wait timer
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine stops the SLI4 FCF rediscover wait timer if it's on. The
+ * caller of this routine should already hold the host lock.
+ **/
+void
+__lpfc_sli4_stop_fcf_redisc_wait_timer(struct lpfc_hba *phba)
+{
+        /* Clear pending FCF rediscovery wait timer */
+        phba->fcf.fcf_flag &= ~FCF_REDISC_PEND;
+        /* Now, try to stop the timer */
+        del_timer(&phba->fcf.redisc_wait);
+}
+
+/**
+ * lpfc_sli4_stop_fcf_redisc_wait_timer - Stop FCF rediscovery wait timer
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine stops the SLI4 FCF rediscover wait timer if it's on. It
+ * checks whether the FCF rediscovery wait timer is pending with the host
+ * lock held before proceeding with disabling the timer and clearing the
+ * wait timer pendig flag.
+ **/
+void
+lpfc_sli4_stop_fcf_redisc_wait_timer(struct lpfc_hba *phba)
+{
+        spin_lock_irq(&phba->hbalock);
+        if (!(phba->fcf.fcf_flag & FCF_REDISC_PEND)) {
+                /* FCF rediscovery timer already fired or stopped */
+                spin_unlock_irq(&phba->hbalock);
+                return;
+        }
+        __lpfc_sli4_stop_fcf_redisc_wait_timer(phba);
+        spin_unlock_irq(&phba->hbalock);
+}
+
+/**
  * lpfc_stop_hba_timers - Stop all the timers associated with an HBA
  * @phba: pointer to lpfc hba data structure.
  *
@@ -2096,6 +2134,7 @@ lpfc_stop_hba_timers(struct lpfc_hba *phba)
                 break;
         case LPFC_PCI_DEV_OC:
                 /* Stop any OneConnect device sepcific driver timers */
+                lpfc_sli4_stop_fcf_redisc_wait_timer(phba);
                 break;
         default:
                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
@@ -2706,7 +2745,7 @@ lpfc_sli_remove_dflt_fcf(struct lpfc_hba *phba)
         del_fcf_record = &mboxq->u.mqe.un.del_fcf_entry;
         bf_set(lpfc_mbx_del_fcf_tbl_count, del_fcf_record, 1);
         bf_set(lpfc_mbx_del_fcf_tbl_index, del_fcf_record,
-               phba->fcf.fcf_indx);
+               phba->fcf.current_rec.fcf_indx);
 
         if (!phba->sli4_hba.intr_enable)
                 rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
@@ -2730,6 +2769,57 @@ lpfc_sli_remove_dflt_fcf(struct lpfc_hba *phba)
 }
 
 /**
+ * lpfc_fcf_redisc_wait_start_timer - Start fcf rediscover wait timer
+ * @phba: Pointer to hba for which this call is being executed.
+ *
+ * This routine starts the timer waiting for the FCF rediscovery to complete.
+ **/
+void
+lpfc_fcf_redisc_wait_start_timer(struct lpfc_hba *phba)
+{
+        unsigned long fcf_redisc_wait_tmo =
+                (jiffies + msecs_to_jiffies(LPFC_FCF_REDISCOVER_WAIT_TMO));
+        /* Start fcf rediscovery wait period timer */
+        mod_timer(&phba->fcf.redisc_wait, fcf_redisc_wait_tmo);
+        spin_lock_irq(&phba->hbalock);
+        /* Allow action to new fcf asynchronous event */
+        phba->fcf.fcf_flag &= ~(FCF_AVAILABLE | FCF_SCAN_DONE);
+        /* Mark the FCF rediscovery pending state */
+        phba->fcf.fcf_flag |= FCF_REDISC_PEND;
+        spin_unlock_irq(&phba->hbalock);
+}
+
+/**
+ * lpfc_sli4_fcf_redisc_wait_tmo - FCF table rediscover wait timeout
+ * @ptr: Map to lpfc_hba data structure pointer.
+ *
+ * This routine is invoked when waiting for FCF table rediscover has been
+ * timed out. If new FCF record(s) has (have) been discovered during the
+ * wait period, a new FCF event shall be added to the FCOE async event
+ * list, and then worker thread shall be waked up for processing from the
+ * worker thread context.
+ **/
+void
+lpfc_sli4_fcf_redisc_wait_tmo(unsigned long ptr)
+{
+        struct lpfc_hba *phba = (struct lpfc_hba *)ptr;
+
+        /* Don't send FCF rediscovery event if timer cancelled */
+        spin_lock_irq(&phba->hbalock);
+        if (!(phba->fcf.fcf_flag & FCF_REDISC_PEND)) {
+                spin_unlock_irq(&phba->hbalock);
+                return;
+        }
+        /* Clear FCF rediscovery timer pending flag */
+        phba->fcf.fcf_flag &= ~FCF_REDISC_PEND;
+        /* FCF rediscovery event to worker thread */
+        phba->fcf.fcf_flag |= FCF_REDISC_EVT;
+        spin_unlock_irq(&phba->hbalock);
+        /* wake up worker thread */
+        lpfc_worker_wake_up(phba);
+}
+
+/**
  * lpfc_sli4_fw_cfg_check - Read the firmware config and verify FCoE support
  * @phba: pointer to lpfc hba data structure.
  *
@@ -3020,17 +3110,26 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
         phba->fcoe_eventtag = acqe_fcoe->event_tag;
         switch (event_type) {
         case LPFC_FCOE_EVENT_TYPE_NEW_FCF:
+        case LPFC_FCOE_EVENT_TYPE_FCF_PARAM_MOD:
                 lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
                         "2546 New FCF found index 0x%x tag 0x%x\n",
                         acqe_fcoe->index,
                         acqe_fcoe->event_tag);
-                /*
-                 * If the current FCF is in discovered state, or
-                 * FCF discovery is in progress do nothing.
-                 */
                 spin_lock_irq(&phba->hbalock);
-                if ((phba->fcf.fcf_flag & FCF_DISCOVERED) ||
-                   (phba->hba_flag & FCF_DISC_INPROGRESS)) {
+                if ((phba->fcf.fcf_flag & FCF_SCAN_DONE) ||
+                    (phba->hba_flag & FCF_DISC_INPROGRESS)) {
+                        /*
+                         * If the current FCF is in discovered state or
+                         * FCF discovery is in progress, do nothing.
+                         */
+                        spin_unlock_irq(&phba->hbalock);
+                        break;
+                }
+                if (phba->fcf.fcf_flag & FCF_REDISC_EVT) {
+                        /*
+                         * If fast FCF failover rescan event is pending,
+                         * do nothing.
+                         */
                         spin_unlock_irq(&phba->hbalock);
                         break;
                 }
@@ -3057,7 +3156,7 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
                         " tag 0x%x\n", acqe_fcoe->index,
                         acqe_fcoe->event_tag);
                 /* If the event is not for currently used fcf do nothing */
-                if (phba->fcf.fcf_indx != acqe_fcoe->index)
+                if (phba->fcf.current_rec.fcf_indx != acqe_fcoe->index)
                         break;
                 /*
                  * Currently, driver support only one FCF - so treat this as
@@ -3121,7 +3220,19 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
                         ndlp->nlp_last_elscmd = ELS_CMD_FDISC;
                         vport->port_state = LPFC_FDISC;
                 } else {
-                        lpfc_retry_pport_discovery(phba);
+                        /*
+                         * Otherwise, we request port to rediscover
+                         * the entire FCF table for a fast recovery
+                         * from possible case that the current FCF
+                         * is no longer valid.
+                         */
+                        rc = lpfc_sli4_redisc_fcf_table(phba);
+                        if (rc)
+                                /*
+                                 * Last resort will be re-try on the
+                                 * the current registered FCF entry.
+                                 */
+                                lpfc_retry_pport_discovery(phba);
                 }
                 break;
         default:
@@ -3198,6 +3309,34 @@ void lpfc_sli4_async_event_proc(struct lpfc_hba *phba)
 }
 
 /**
+ * lpfc_sli4_fcf_redisc_event_proc - Process fcf table rediscovery event
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine is invoked by the worker thread to process FCF table
+ * rediscovery pending completion event.
+ **/
+void lpfc_sli4_fcf_redisc_event_proc(struct lpfc_hba *phba)
+{
+        int rc;
+
+        spin_lock_irq(&phba->hbalock);
+        /* Clear FCF rediscovery timeout event */
+        phba->fcf.fcf_flag &= ~FCF_REDISC_EVT;
+        /* Clear driver fast failover FCF record flag */
+        phba->fcf.failover_rec.flag = 0;
+        /* Set state for FCF fast failover */
+        phba->fcf.fcf_flag |= FCF_REDISC_FOV;
+        spin_unlock_irq(&phba->hbalock);
+
+        /* Scan FCF table from the first entry to re-discover SAN */
+        rc = lpfc_sli4_read_fcf_record(phba, LPFC_FCOE_FCF_GET_FIRST);
+        if (rc)
+                lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
+                                "2747 Post FCF rediscovery read FCF record "
+                                "failed 0x%x\n", rc);
+}
+
+/**
  * lpfc_api_table_setup - Set up per hba pci-device group func api jump table
  * @phba: pointer to lpfc hba data structure.
  * @dev_grp: The HBA PCI-Device group number.
@@ -3512,6 +3651,11 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
         init_timer(&phba->eratt_poll);
         phba->eratt_poll.function = lpfc_poll_eratt;
         phba->eratt_poll.data = (unsigned long) phba;
+        /* FCF rediscover timer */
+        init_timer(&phba->fcf.redisc_wait);
+        phba->fcf.redisc_wait.function = lpfc_sli4_fcf_redisc_wait_tmo;
+        phba->fcf.redisc_wait.data = (unsigned long)phba;
+
         /*
          * We need to do a READ_CONFIG mailbox command here before
          * calling lpfc_get_cfgparam. For VFs this will report the
@@ -6039,7 +6183,7 @@ lpfc_sli4_fcfi_unreg(struct lpfc_hba *phba, uint16_t fcfi)
                 spin_lock_irqsave(&phba->hbalock, flags);
                 /* Mark the FCFI is no longer registered */
                 phba->fcf.fcf_flag &=
-                        ~(FCF_AVAILABLE | FCF_REGISTERED | FCF_DISCOVERED);
+                        ~(FCF_AVAILABLE | FCF_REGISTERED | FCF_SCAN_DONE);
                 spin_unlock_irqrestore(&phba->hbalock, flags);
         }
 }
diff --git a/drivers/scsi/lpfc/lpfc_mbox.c b/drivers/scsi/lpfc/lpfc_mbox.c
index a9afd8b94b6a..c2cc29f70a4b 100644
--- a/drivers/scsi/lpfc/lpfc_mbox.c
+++ b/drivers/scsi/lpfc/lpfc_mbox.c
@@ -1747,6 +1747,65 @@ lpfc_sli4_mbox_opcode_get(struct lpfc_hba *phba, struct lpfcMboxq *mbox)
 }
 
 /**
+ * lpfc_sli4_mbx_read_fcf_record - Allocate and construct read fcf mbox cmd
+ * @phba: pointer to lpfc hba data structure.
+ * @fcf_index: index to fcf table.
+ *
+ * This routine routine allocates and constructs non-embedded mailbox command
+ * for reading a FCF table entry refered by @fcf_index.
+ *
+ * Return: pointer to the mailbox command constructed if successful, otherwise
+ * NULL.
+ **/
+int
+lpfc_sli4_mbx_read_fcf_record(struct lpfc_hba *phba,
+                              struct lpfcMboxq *mboxq,
+                              uint16_t fcf_index)
+{
+        void *virt_addr;
+        dma_addr_t phys_addr;
+        uint8_t *bytep;
+        struct lpfc_mbx_sge sge;
+        uint32_t alloc_len, req_len;
+        struct lpfc_mbx_read_fcf_tbl *read_fcf;
+
+        if (!mboxq)
+                return -ENOMEM;
+
+        req_len = sizeof(struct fcf_record) +
+                  sizeof(union lpfc_sli4_cfg_shdr) + 2 * sizeof(uint32_t);
+
+        /* Set up READ_FCF SLI4_CONFIG mailbox-ioctl command */
+        alloc_len = lpfc_sli4_config(phba, mboxq, LPFC_MBOX_SUBSYSTEM_FCOE,
+                        LPFC_MBOX_OPCODE_FCOE_READ_FCF_TABLE, req_len,
+                        LPFC_SLI4_MBX_NEMBED);
+
+        if (alloc_len < req_len) {
+                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX,
+                                "0291 Allocated DMA memory size (x%x) is "
+                                "less than the requested DMA memory "
+                                "size (x%x)\n", alloc_len, req_len);
+                return -ENOMEM;
+        }
+
+        /* Get the first SGE entry from the non-embedded DMA memory. This
+         * routine only uses a single SGE.
+         */
+        lpfc_sli4_mbx_sge_get(mboxq, 0, &sge);
+        phys_addr = getPaddr(sge.pa_hi, sge.pa_lo);
+        virt_addr = mboxq->sge_array->addr[0];
+        read_fcf = (struct lpfc_mbx_read_fcf_tbl *)virt_addr;
+
+        /* Set up command fields */
+        bf_set(lpfc_mbx_read_fcf_tbl_indx, &read_fcf->u.request, fcf_index);
+        /* Perform necessary endian conversion */
+        bytep = virt_addr + sizeof(union lpfc_sli4_cfg_shdr);
+        lpfc_sli_pcimem_bcopy(bytep, bytep, sizeof(uint32_t));
+
+        return 0;
+}
+
+/**
  * lpfc_request_features: Configure SLI4 REQUEST_FEATURES mailbox
  * @mboxq: pointer to lpfc mbox command.
  *
@@ -1946,13 +2005,14 @@ lpfc_reg_fcfi(struct lpfc_hba *phba, struct lpfcMboxq *mbox)
         bf_set(lpfc_reg_fcfi_rq_id1, reg_fcfi, REG_FCF_INVALID_QID);
         bf_set(lpfc_reg_fcfi_rq_id2, reg_fcfi, REG_FCF_INVALID_QID);
         bf_set(lpfc_reg_fcfi_rq_id3, reg_fcfi, REG_FCF_INVALID_QID);
-        bf_set(lpfc_reg_fcfi_info_index, reg_fcfi, phba->fcf.fcf_indx);
+        bf_set(lpfc_reg_fcfi_info_index, reg_fcfi,
+               phba->fcf.current_rec.fcf_indx);
         /* reg_fcf addr mode is bit wise inverted value of fcf addr_mode */
-        bf_set(lpfc_reg_fcfi_mam, reg_fcfi,
-                (~phba->fcf.addr_mode) & 0x3);
-        if (phba->fcf.fcf_flag & FCF_VALID_VLAN) {
+        bf_set(lpfc_reg_fcfi_mam, reg_fcfi, (~phba->fcf.addr_mode) & 0x3);
+        if (phba->fcf.current_rec.vlan_id != 0xFFFF) {
                 bf_set(lpfc_reg_fcfi_vv, reg_fcfi, 1);
-                bf_set(lpfc_reg_fcfi_vlan_tag, reg_fcfi, phba->fcf.vlan_id);
+                bf_set(lpfc_reg_fcfi_vlan_tag, reg_fcfi,
+                       phba->fcf.current_rec.vlan_id);
         }
 }
 
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 8d666d9fabb4..d2ddf7d9e1bb 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -11956,12 +11956,6 @@ lpfc_sli4_read_fcf_record(struct lpfc_hba *phba, uint16_t fcf_index)
 {
         int rc = 0, error;
         LPFC_MBOXQ_t *mboxq;
-        void *virt_addr;
-        dma_addr_t phys_addr;
-        uint8_t *bytep;
-        struct lpfc_mbx_sge sge;
-        uint32_t alloc_len, req_len;
-        struct lpfc_mbx_read_fcf_tbl *read_fcf;
 
         phba->fcoe_eventtag_at_fcf_scan = phba->fcoe_eventtag;
         mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
@@ -11972,43 +11966,19 @@ lpfc_sli4_read_fcf_record(struct lpfc_hba *phba, uint16_t fcf_index)
                 error = -ENOMEM;
                 goto fail_fcfscan;
         }
-
-        req_len = sizeof(struct fcf_record) +
-                  sizeof(union lpfc_sli4_cfg_shdr) + 2 * sizeof(uint32_t);
-
-        /* Set up READ_FCF SLI4_CONFIG mailbox-ioctl command */
-        alloc_len = lpfc_sli4_config(phba, mboxq, LPFC_MBOX_SUBSYSTEM_FCOE,
-                         LPFC_MBOX_OPCODE_FCOE_READ_FCF_TABLE, req_len,
-                         LPFC_SLI4_MBX_NEMBED);
-
-        if (alloc_len < req_len) {
-                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
-                                "0291 Allocated DMA memory size (x%x) is "
-                                "less than the requested DMA memory "
-                                "size (x%x)\n", alloc_len, req_len);
-                error = -ENOMEM;
+        /* Construct the read FCF record mailbox command */
+        rc = lpfc_sli4_mbx_read_fcf_record(phba, mboxq, fcf_index);
+        if (rc) {
+                error = -EINVAL;
                 goto fail_fcfscan;
         }
-
-        /* Get the first SGE entry from the non-embedded DMA memory. This
-         * routine only uses a single SGE.
-         */
-        lpfc_sli4_mbx_sge_get(mboxq, 0, &sge);
-        phys_addr = getPaddr(sge.pa_hi, sge.pa_lo);
-        virt_addr = mboxq->sge_array->addr[0];
-        read_fcf = (struct lpfc_mbx_read_fcf_tbl *)virt_addr;
-
-        /* Set up command fields */
-        bf_set(lpfc_mbx_read_fcf_tbl_indx, &read_fcf->u.request, fcf_index);
-        /* Perform necessary endian conversion */
-        bytep = virt_addr + sizeof(union lpfc_sli4_cfg_shdr);
-        lpfc_sli_pcimem_bcopy(bytep, bytep, sizeof(uint32_t));
+        /* Issue the mailbox command asynchronously */
         mboxq->vport = phba->pport;
         mboxq->mbox_cmpl = lpfc_mbx_cmpl_read_fcf_record;
         rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
-        if (rc == MBX_NOT_FINISHED) {
+        if (rc == MBX_NOT_FINISHED)
                 error = -EIO;
-        } else {
+        else {
                 spin_lock_irq(&phba->hbalock);
                 phba->hba_flag |= FCF_DISC_INPROGRESS;
                 spin_unlock_irq(&phba->hbalock);
@@ -12027,6 +11997,90 @@ fail_fcfscan:
 }
 
 /**
+ * lpfc_mbx_cmpl_redisc_fcf_table - completion routine for rediscover FCF table
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine is the completion routine for the rediscover FCF table mailbox
+ * command. If the mailbox command returned failure, it will try to stop the
+ * FCF rediscover wait timer.
+ **/
+void
+lpfc_mbx_cmpl_redisc_fcf_table(struct lpfc_hba *phba, LPFC_MBOXQ_t *mbox)
+{
+        struct lpfc_mbx_redisc_fcf_tbl *redisc_fcf;
+        uint32_t shdr_status, shdr_add_status;
+
+        redisc_fcf = &mbox->u.mqe.un.redisc_fcf_tbl;
+
+        shdr_status = bf_get(lpfc_mbox_hdr_status,
+                             &redisc_fcf->header.cfg_shdr.response);
+        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status,
+                             &redisc_fcf->header.cfg_shdr.response);
+        if (shdr_status || shdr_add_status) {
+                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
+                                "2746 Requesting for FCF rediscovery failed "
+                                "status x%x add_status x%x\n",
+                                shdr_status, shdr_add_status);
+                /*
+                 * Request failed, last resort to re-try current
+                 * registered FCF entry
+                 */
+                lpfc_retry_pport_discovery(phba);
+        } else
+                /*
+                 * Start FCF rediscovery wait timer for pending FCF
+                 * before rescan FCF record table.
+                 */
+                lpfc_fcf_redisc_wait_start_timer(phba);
+
+        mempool_free(mbox, phba->mbox_mem_pool);
+}
+
+/**
+ * lpfc_sli4_redisc_all_fcf - Request to rediscover entire FCF table by port.
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine is invoked to request for rediscovery of the entire FCF table
+ * by the port.
+ **/
+int
+lpfc_sli4_redisc_fcf_table(struct lpfc_hba *phba)
+{
+        LPFC_MBOXQ_t *mbox;
+        struct lpfc_mbx_redisc_fcf_tbl *redisc_fcf;
+        int rc, length;
+
+        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+        if (!mbox) {
+                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
+                                "2745 Failed to allocate mbox for "
+                                "requesting FCF rediscover.\n");
+                return -ENOMEM;
+        }
+
+        length = (sizeof(struct lpfc_mbx_redisc_fcf_tbl) -
+                  sizeof(struct lpfc_sli4_cfg_mhdr));
+        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
+                         LPFC_MBOX_OPCODE_FCOE_REDISCOVER_FCF,
+                         length, LPFC_SLI4_MBX_EMBED);
+
+        redisc_fcf = &mbox->u.mqe.un.redisc_fcf_tbl;
+        /* Set count to 0 for invalidating the entire FCF database */
+        bf_set(lpfc_mbx_redisc_fcf_count, redisc_fcf, 0);
+
+        /* Issue the mailbox command asynchronously */
+        mbox->vport = phba->pport;
+        mbox->mbox_cmpl = lpfc_mbx_cmpl_redisc_fcf_table;
+        rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
+
+        if (rc == MBX_NOT_FINISHED) {
+                mempool_free(mbox, phba->mbox_mem_pool);
+                return -EIO;
+        }
+        return 0;
+}
+
+/**
  * lpfc_sli_read_link_ste - Read region 23 to decide if link is disabled.
  * @phba: pointer to lpfc hba data structure.
  *
diff --git a/drivers/scsi/lpfc/lpfc_sli4.h b/drivers/scsi/lpfc/lpfc_sli4.h
index 2e5e40576864..0a4f59ea21d0 100644
--- a/drivers/scsi/lpfc/lpfc_sli4.h
+++ b/drivers/scsi/lpfc/lpfc_sli4.h
@@ -22,6 +22,10 @@
 #define LPFC_RELEASE_NOTIFICATION_INTERVAL      32
 #define LPFC_GET_QE_REL_INT                     32
 #define LPFC_RPI_LOW_WATER_MARK                 10
+
+/* Amount of time in seconds for waiting FCF rediscovery to complete */
+#define LPFC_FCF_REDISCOVER_WAIT_TMO            2000 /* msec */
+
 /* Number of SGL entries can be posted in a 4KB nonembedded mbox command */
 #define LPFC_NEMBED_MBOX_SGL_CNT                254
 
@@ -129,22 +133,33 @@ struct lpfc_sli4_link {
         uint16_t logical_speed;
 };
 
-struct lpfc_fcf {
-        uint8_t  fabric_name[8];
-        uint8_t  switch_name[8];
+struct lpfc_fcf_rec {
+        uint8_t  fabric_name[8];
+        uint8_t  switch_name[8];
         uint8_t  mac_addr[6];
         uint16_t fcf_indx;
+        uint32_t priority;
+        uint16_t vlan_id;
+        uint32_t addr_mode;
+        uint32_t flag;
+#define BOOT_ENABLE     0x01
+#define RECORD_VALID    0x02
+};
+
+struct lpfc_fcf {
         uint16_t fcfi;
         uint32_t fcf_flag;
 #define FCF_AVAILABLE   0x01 /* FCF available for discovery */
 #define FCF_REGISTERED  0x02 /* FCF registered with FW */
-#define FCF_DISCOVERED  0x04 /* FCF discovery started  */
-#define FCF_BOOT_ENABLE 0x08 /* Boot bios use this FCF */
-#define FCF_IN_USE      0x10 /* Atleast one discovery completed */
-#define FCF_VALID_VLAN  0x20 /* Use the vlan id specified */
-        uint32_t priority;
+#define FCF_SCAN_DONE   0x04 /* FCF table scan done */
+#define FCF_IN_USE      0x08 /* Atleast one discovery completed */
+#define FCF_REDISC_PEND 0x10 /* FCF rediscovery pending */
+#define FCF_REDISC_EVT  0x20 /* FCF rediscovery event to worker thread */
+#define FCF_REDISC_FOV  0x40 /* Post FCF rediscovery fast failover */
         uint32_t addr_mode;
-        uint16_t vlan_id;
+        struct lpfc_fcf_rec current_rec;
+        struct lpfc_fcf_rec failover_rec;
+        struct timer_list redisc_wait;
 };
 
 #define LPFC_REGION23_SIGNATURE "RG23"
@@ -407,6 +422,8 @@ void lpfc_sli4_mbox_cmd_free(struct lpfc_hba *, struct lpfcMboxq *);
 void lpfc_sli4_mbx_sge_set(struct lpfcMboxq *, uint32_t, dma_addr_t, uint32_t);
 void lpfc_sli4_mbx_sge_get(struct lpfcMboxq *, uint32_t,
                            struct lpfc_mbx_sge *);
+int lpfc_sli4_mbx_read_fcf_record(struct lpfc_hba *, struct lpfcMboxq *,
+                                  uint16_t);
 
 void lpfc_sli4_hba_reset(struct lpfc_hba *);
 struct lpfc_queue *lpfc_sli4_queue_alloc(struct lpfc_hba *, uint32_t,
@@ -449,6 +466,7 @@ int lpfc_sli4_alloc_rpi(struct lpfc_hba *);
 void lpfc_sli4_free_rpi(struct lpfc_hba *, int);
 void lpfc_sli4_remove_rpis(struct lpfc_hba *);
 void lpfc_sli4_async_event_proc(struct lpfc_hba *);
+void lpfc_sli4_fcf_redisc_event_proc(struct lpfc_hba *);
 int lpfc_sli4_resume_rpi(struct lpfc_nodelist *);
 void lpfc_sli4_fcp_xri_abort_event_proc(struct lpfc_hba *);
 void lpfc_sli4_els_xri_abort_event_proc(struct lpfc_hba *);