Merge commit '3ff195b011d7decf501a4d55aeed312731094796' into for-linus

Conflicts:
	drivers/md/md.c

- Resolved conflict in md_update_sb
- Added extra 'NULL' arg to new instance of sysfs_get_dirent.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 348 insertions, 111 deletions

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index d29ac7c317d9..cd9697edf860 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -29,6 +29,7 @@
 #include <linux/spinlock.h>
 #include <linux/ctype.h>
 #include <linux/aer.h>
+#include <linux/slab.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_device.h>
@@ -350,7 +351,12 @@ lpfc_config_port_post(struct lpfc_hba *phba)
 	mb = &pmb->u.mb;
 
 	/* Get login parameters for NID.  */
-	lpfc_read_sparam(phba, pmb, 0);
+	rc = lpfc_read_sparam(phba, pmb, 0);
+	if (rc) {
+		mempool_free(pmb, phba->mbox_mem_pool);
+		return -ENOMEM;
+	}
+
 	pmb->vport = vport;
 	if (lpfc_sli_issue_mbox(phba, pmb, MBX_POLL) != MBX_SUCCESS) {
 		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
@@ -359,7 +365,7 @@ lpfc_config_port_post(struct lpfc_hba *phba)
 				mb->mbxCommand, mb->mbxStatus);
 		phba->link_state = LPFC_HBA_ERROR;
 		mp = (struct lpfc_dmabuf *) pmb->context1;
-		mempool_free( pmb, phba->mbox_mem_pool);
+		mempool_free(pmb, phba->mbox_mem_pool);
 		lpfc_mbuf_free(phba, mp->virt, mp->phys);
 		kfree(mp);
 		return -EIO;
@@ -544,7 +550,7 @@ lpfc_config_port_post(struct lpfc_hba *phba)
 			mempool_free(pmb, phba->mbox_mem_pool);
 			return -EIO;
 		}
-	} else if (phba->cfg_suppress_link_up == 0) {
+	} else if (phba->cfg_suppress_link_up == LPFC_INITIALIZE_LINK) {
 		lpfc_init_link(phba, pmb, phba->cfg_topology,
 			phba->cfg_link_speed);
 		pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
@@ -571,6 +577,11 @@ lpfc_config_port_post(struct lpfc_hba *phba)
 	}
 	/* MBOX buffer will be freed in mbox compl */
 	pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+	if (!pmb) {
+		phba->link_state = LPFC_HBA_ERROR;
+		return -ENOMEM;
+	}
+
 	lpfc_config_async(phba, pmb, LPFC_ELS_RING);
 	pmb->mbox_cmpl = lpfc_config_async_cmpl;
 	pmb->vport = phba->pport;
@@ -588,6 +599,11 @@ lpfc_config_port_post(struct lpfc_hba *phba)
 
 	/* Get Option rom version */
 	pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+	if (!pmb) {
+		phba->link_state = LPFC_HBA_ERROR;
+		return -ENOMEM;
+	}
+
 	lpfc_dump_wakeup_param(phba, pmb);
 	pmb->mbox_cmpl = lpfc_dump_wakeup_param_cmpl;
 	pmb->vport = phba->pport;
@@ -652,7 +668,7 @@ lpfc_hba_init_link(struct lpfc_hba *phba)
 			mempool_free(pmb, phba->mbox_mem_pool);
 		return -EIO;
 	}
-	phba->cfg_suppress_link_up = 0;
+	phba->cfg_suppress_link_up = LPFC_INITIALIZE_LINK;
 
 	return 0;
 }
@@ -807,6 +823,8 @@ lpfc_hba_down_post_s4(struct lpfc_hba *phba)
 	LIST_HEAD(aborts);
 	int ret;
 	unsigned long iflag = 0;
+	struct lpfc_sglq *sglq_entry = NULL;
+
 	ret = lpfc_hba_down_post_s3(phba);
 	if (ret)
 		return ret;
@@ -822,6 +840,10 @@ lpfc_hba_down_post_s4(struct lpfc_hba *phba)
 	 * list.
 	 */
 	spin_lock(&phba->sli4_hba.abts_sgl_list_lock);
+	list_for_each_entry(sglq_entry,
+		&phba->sli4_hba.lpfc_abts_els_sgl_list, list)
+		sglq_entry->state = SGL_FREED;
+
 	list_splice_init(&phba->sli4_hba.lpfc_abts_els_sgl_list,
 			&phba->sli4_hba.lpfc_sgl_list);
 	spin_unlock(&phba->sli4_hba.abts_sgl_list_lock);
@@ -2178,8 +2200,10 @@ lpfc_stop_vport_timers(struct lpfc_vport *vport)
 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;
+	/* Clear pending FCF rediscovery wait and failover in progress flags */
+	phba->fcf.fcf_flag &= ~(FCF_REDISC_PEND |
+				FCF_DEAD_DISC |
+				FCF_ACVL_DISC);
 	/* Now, try to stop the timer */
 	del_timer(&phba->fcf.redisc_wait);
 }
@@ -2542,7 +2566,7 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
 	shost->max_cmd_len = 16;
 	if (phba->sli_rev == LPFC_SLI_REV4) {
 		shost->dma_boundary =
-			phba->sli4_hba.pc_sli4_params.sge_supp_len;
+			phba->sli4_hba.pc_sli4_params.sge_supp_len-1;
 		shost->sg_tablesize = phba->cfg_sg_seg_cnt;
 	}
 
@@ -2576,7 +2600,6 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
 	init_timer(&vport->els_tmofunc);
 	vport->els_tmofunc.function = lpfc_els_timeout;
 	vport->els_tmofunc.data = (unsigned long)vport;
-
 	error = scsi_add_host_with_dma(shost, dev, &phba->pcidev->dev);
 	if (error)
 		goto out_put_shost;
@@ -2912,6 +2935,9 @@ lpfc_sli4_fcf_redisc_wait_tmo(unsigned long ptr)
 	/* FCF rediscovery event to worker thread */
 	phba->fcf.fcf_flag |= FCF_REDISC_EVT;
 	spin_unlock_irq(&phba->hbalock);
+	lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
+			"2776 FCF rediscover wait timer expired, post "
+			"a worker thread event for FCF table scan\n");
 	/* wake up worker thread */
 	lpfc_worker_wake_up(phba);
 }
@@ -3183,6 +3209,82 @@ out_free_pmb:
 }
 
 /**
+ * lpfc_sli4_perform_vport_cvl - Perform clear virtual link on a vport
+ * @vport: pointer to vport data structure.
+ *
+ * This routine is to perform Clear Virtual Link (CVL) on a vport in
+ * response to a CVL event.
+ *
+ * Return the pointer to the ndlp with the vport if successful, otherwise
+ * return NULL.
+ **/
+static struct lpfc_nodelist *
+lpfc_sli4_perform_vport_cvl(struct lpfc_vport *vport)
+{
+	struct lpfc_nodelist *ndlp;
+	struct Scsi_Host *shost;
+	struct lpfc_hba *phba;
+
+	if (!vport)
+		return NULL;
+	phba = vport->phba;
+	if (!phba)
+		return NULL;
+	ndlp = lpfc_findnode_did(vport, Fabric_DID);
+	if (!ndlp) {
+		/* Cannot find existing Fabric ndlp, so allocate a new one */
+		ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
+		if (!ndlp)
+			return 0;
+		lpfc_nlp_init(vport, ndlp, Fabric_DID);
+		/* Set the node type */
+		ndlp->nlp_type |= NLP_FABRIC;
+		/* Put ndlp onto node list */
+		lpfc_enqueue_node(vport, ndlp);
+	} else if (!NLP_CHK_NODE_ACT(ndlp)) {
+		/* re-setup ndlp without removing from node list */
+		ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_UNUSED_NODE);
+		if (!ndlp)
+			return 0;
+	}
+	if (phba->pport->port_state <= LPFC_FLOGI)
+		return NULL;
+	/* If virtual link is not yet instantiated ignore CVL */
+	if (vport->port_state <= LPFC_FDISC)
+		return NULL;
+	shost = lpfc_shost_from_vport(vport);
+	if (!shost)
+		return NULL;
+	lpfc_linkdown_port(vport);
+	lpfc_cleanup_pending_mbox(vport);
+	spin_lock_irq(shost->host_lock);
+	vport->fc_flag |= FC_VPORT_CVL_RCVD;
+	spin_unlock_irq(shost->host_lock);
+
+	return ndlp;
+}
+
+/**
+ * lpfc_sli4_perform_all_vport_cvl - Perform clear virtual link on all vports
+ * @vport: pointer to lpfc hba data structure.
+ *
+ * This routine is to perform Clear Virtual Link (CVL) on all vports in
+ * response to a FCF dead event.
+ **/
+static void
+lpfc_sli4_perform_all_vport_cvl(struct lpfc_hba *phba)
+{
+	struct lpfc_vport **vports;
+	int i;
+
+	vports = lpfc_create_vport_work_array(phba);
+	if (vports)
+		for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++)
+			lpfc_sli4_perform_vport_cvl(vports[i]);
+	lpfc_destroy_vport_work_array(phba, vports);
+}
+
+/**
  * lpfc_sli4_async_fcoe_evt - Process the asynchronous fcoe event
  * @phba: pointer to lpfc hba data structure.
  * @acqe_link: pointer to the async fcoe completion queue entry.
@@ -3198,7 +3300,6 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
 	struct lpfc_vport *vport;
 	struct lpfc_nodelist *ndlp;
 	struct Scsi_Host  *shost;
-	uint32_t link_state;
 	int active_vlink_present;
 	struct lpfc_vport **vports;
 	int i;
@@ -3208,10 +3309,20 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
 	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 (event_type == LPFC_FCOE_EVENT_TYPE_NEW_FCF)
+			lpfc_printf_log(phba, KERN_ERR, LOG_FIP |
+					LOG_DISCOVERY,
+					"2546 New FCF found event: "
+					"evt_tag:x%x, fcf_index:x%x\n",
+					acqe_fcoe->event_tag,
+					acqe_fcoe->index);
+		else
+			lpfc_printf_log(phba, KERN_WARNING, LOG_FIP |
+					LOG_DISCOVERY,
+					"2788 FCF parameter modified event: "
+					"evt_tag:x%x, fcf_index:x%x\n",
+					acqe_fcoe->event_tag,
+					acqe_fcoe->index);
 		spin_lock_irq(&phba->hbalock);
 		if ((phba->fcf.fcf_flag & FCF_SCAN_DONE) ||
 		    (phba->hba_flag & FCF_DISC_INPROGRESS)) {
@@ -3222,6 +3333,7 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
 			spin_unlock_irq(&phba->hbalock);
 			break;
 		}
+
 		if (phba->fcf.fcf_flag & FCF_REDISC_EVT) {
 			/*
 			 * If fast FCF failover rescan event is pending,
@@ -3232,12 +3344,33 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
 		}
 		spin_unlock_irq(&phba->hbalock);
 
-		/* Read the FCF table and re-discover SAN. */
-		rc = lpfc_sli4_read_fcf_record(phba, LPFC_FCOE_FCF_GET_FIRST);
+		if ((phba->fcf.fcf_flag & FCF_DISCOVERY) &&
+		    !(phba->fcf.fcf_flag & FCF_REDISC_FOV)) {
+			/*
+			 * During period of FCF discovery, read the FCF
+			 * table record indexed by the event to update
+			 * FCF round robin failover eligible FCF bmask.
+			 */
+			lpfc_printf_log(phba, KERN_INFO, LOG_FIP |
+					LOG_DISCOVERY,
+					"2779 Read new FCF record with "
+					"fcf_index:x%x for updating FCF "
+					"round robin failover bmask\n",
+					acqe_fcoe->index);
+			rc = lpfc_sli4_read_fcf_rec(phba, acqe_fcoe->index);
+		}
+
+		/* Otherwise, scan the entire FCF table and re-discover SAN */
+		lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
+				"2770 Start FCF table scan due to new FCF "
+				"event: evt_tag:x%x, fcf_index:x%x\n",
+				acqe_fcoe->event_tag, acqe_fcoe->index);
+		rc = lpfc_sli4_fcf_scan_read_fcf_rec(phba,
+						     LPFC_FCOE_FCF_GET_FIRST);
 		if (rc)
-			lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
-					"2547 Read FCF record failed 0x%x\n",
-					rc);
+			lpfc_printf_log(phba, KERN_ERR, LOG_FIP | LOG_DISCOVERY,
+					"2547 Issue FCF scan read FCF mailbox "
+					"command failed 0x%x\n", rc);
 		break;
 
 	case LPFC_FCOE_EVENT_TYPE_FCF_TABLE_FULL:
@@ -3248,47 +3381,63 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
 		break;
 
 	case LPFC_FCOE_EVENT_TYPE_FCF_DEAD:
-		lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
+		lpfc_printf_log(phba, KERN_ERR, LOG_FIP | LOG_DISCOVERY,
 			"2549 FCF disconnected from network index 0x%x"
 			" 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.current_rec.fcf_indx != acqe_fcoe->index)
 			break;
-		/*
-		 * Currently, driver support only one FCF - so treat this as
-		 * a link down, but save the link state because we don't want
-		 * it to be changed to Link Down unless it is already down.
+		/* We request port to rediscover the entire FCF table for
+		 * a fast recovery from case that the current FCF record
+		 * is no longer valid if we are not in the middle of FCF
+		 * failover process already.
 		 */
-		link_state = phba->link_state;
-		lpfc_linkdown(phba);
-		phba->link_state = link_state;
-		/* Unregister FCF if no devices connected to it */
-		lpfc_unregister_unused_fcf(phba);
+		spin_lock_irq(&phba->hbalock);
+		if (phba->fcf.fcf_flag & FCF_DISCOVERY) {
+			spin_unlock_irq(&phba->hbalock);
+			/* Update FLOGI FCF failover eligible FCF bmask */
+			lpfc_sli4_fcf_rr_index_clear(phba, acqe_fcoe->index);
+			break;
+		}
+		/* Mark the fast failover process in progress */
+		phba->fcf.fcf_flag |= FCF_DEAD_DISC;
+		spin_unlock_irq(&phba->hbalock);
+		lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
+				"2771 Start FCF fast failover process due to "
+				"FCF DEAD event: evt_tag:x%x, fcf_index:x%x "
+				"\n", acqe_fcoe->event_tag, acqe_fcoe->index);
+		rc = lpfc_sli4_redisc_fcf_table(phba);
+		if (rc) {
+			lpfc_printf_log(phba, KERN_ERR, LOG_FIP |
+					LOG_DISCOVERY,
+					"2772 Issue FCF rediscover mabilbox "
+					"command failed, fail through to FCF "
+					"dead event\n");
+			spin_lock_irq(&phba->hbalock);
+			phba->fcf.fcf_flag &= ~FCF_DEAD_DISC;
+			spin_unlock_irq(&phba->hbalock);
+			/*
+			 * Last resort will fail over by treating this
+			 * as a link down to FCF registration.
+			 */
+			lpfc_sli4_fcf_dead_failthrough(phba);
+		} else
+			/* Handling fast FCF failover to a DEAD FCF event
+			 * is considered equalivant to receiving CVL to all
+			 * vports.
+			 */
+			lpfc_sli4_perform_all_vport_cvl(phba);
 		break;
 	case LPFC_FCOE_EVENT_TYPE_CVL:
-		lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
+		lpfc_printf_log(phba, KERN_ERR, LOG_FIP | LOG_DISCOVERY,
 			"2718 Clear Virtual Link Received for VPI 0x%x"
 			" tag 0x%x\n", acqe_fcoe->index, acqe_fcoe->event_tag);
 		vport = lpfc_find_vport_by_vpid(phba,
 				acqe_fcoe->index - phba->vpi_base);
-		if (!vport)
-			break;
-		ndlp = lpfc_findnode_did(vport, Fabric_DID);
+		ndlp = lpfc_sli4_perform_vport_cvl(vport);
 		if (!ndlp)
 			break;
-		shost = lpfc_shost_from_vport(vport);
-		if (phba->pport->port_state <= LPFC_FLOGI)
-			break;
-		/* If virtual link is not yet instantiated ignore CVL */
-		if (vport->port_state <= LPFC_FDISC)
-			break;
-
-		lpfc_linkdown_port(vport);
-		lpfc_cleanup_pending_mbox(vport);
-		spin_lock_irq(shost->host_lock);
-		vport->fc_flag |= FC_VPORT_CVL_RCVD;
-		spin_unlock_irq(shost->host_lock);
 		active_vlink_present = 0;
 
 		vports = lpfc_create_vport_work_array(phba);
@@ -3311,6 +3460,7 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
 			 * re-instantiate the Vlink using FDISC.
 			 */
 			mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
+			shost = lpfc_shost_from_vport(vport);
 			spin_lock_irq(shost->host_lock);
 			ndlp->nlp_flag |= NLP_DELAY_TMO;
 			spin_unlock_irq(shost->host_lock);
@@ -3321,15 +3471,38 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *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.
+			 * is no longer valid if we are not already
+			 * in the FCF failover process.
 			 */
+			spin_lock_irq(&phba->hbalock);
+			if (phba->fcf.fcf_flag & FCF_DISCOVERY) {
+				spin_unlock_irq(&phba->hbalock);
+				break;
+			}
+			/* Mark the fast failover process in progress */
+			phba->fcf.fcf_flag |= FCF_ACVL_DISC;
+			spin_unlock_irq(&phba->hbalock);
+			lpfc_printf_log(phba, KERN_INFO, LOG_FIP |
+					LOG_DISCOVERY,
+					"2773 Start FCF fast failover due "
+					"to CVL event: evt_tag:x%x\n",
+					acqe_fcoe->event_tag);
 			rc = lpfc_sli4_redisc_fcf_table(phba);
-			if (rc)
+			if (rc) {
+				lpfc_printf_log(phba, KERN_ERR, LOG_FIP |
+						LOG_DISCOVERY,
+						"2774 Issue FCF rediscover "
+						"mabilbox command failed, "
+						"through to CVL event\n");
+				spin_lock_irq(&phba->hbalock);
+				phba->fcf.fcf_flag &= ~FCF_ACVL_DISC;
+				spin_unlock_irq(&phba->hbalock);
 				/*
 				 * Last resort will be re-try on the
 				 * the current registered FCF entry.
 				 */
 				lpfc_retry_pport_discovery(phba);
+			}
 		}
 		break;
 	default:
@@ -3358,6 +3531,32 @@ lpfc_sli4_async_dcbx_evt(struct lpfc_hba *phba,
 }
 
 /**
+ * lpfc_sli4_async_grp5_evt - Process the asynchronous group5 event
+ * @phba: pointer to lpfc hba data structure.
+ * @acqe_link: pointer to the async grp5 completion queue entry.
+ *
+ * This routine is to handle the SLI4 asynchronous grp5 event. A grp5 event
+ * is an asynchronous notified of a logical link speed change.  The Port
+ * reports the logical link speed in units of 10Mbps.
+ **/
+static void
+lpfc_sli4_async_grp5_evt(struct lpfc_hba *phba,
+			 struct lpfc_acqe_grp5 *acqe_grp5)
+{
+	uint16_t prev_ll_spd;
+
+	phba->fc_eventTag = acqe_grp5->event_tag;
+	phba->fcoe_eventtag = acqe_grp5->event_tag;
+	prev_ll_spd = phba->sli4_hba.link_state.logical_speed;
+	phba->sli4_hba.link_state.logical_speed =
+		(bf_get(lpfc_acqe_grp5_llink_spd, acqe_grp5));
+	lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
+			"2789 GRP5 Async Event: Updating logical link speed "
+			"from %dMbps to %dMbps\n", (prev_ll_spd * 10),
+			(phba->sli4_hba.link_state.logical_speed*10));
+}
+
+/**
  * lpfc_sli4_async_event_proc - Process all the pending asynchronous event
  * @phba: pointer to lpfc hba data structure.
  *
@@ -3393,6 +3592,10 @@ void lpfc_sli4_async_event_proc(struct lpfc_hba *phba)
 			lpfc_sli4_async_dcbx_evt(phba,
 						 &cq_event->cqe.acqe_dcbx);
 			break;
+		case LPFC_TRAILER_CODE_GRP5:
+			lpfc_sli4_async_grp5_evt(phba,
+						 &cq_event->cqe.acqe_grp5);
+			break;
 		default:
 			lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
 					"1804 Invalid asynchrous event code: "
@@ -3426,11 +3629,14 @@ void lpfc_sli4_fcf_redisc_event_proc(struct lpfc_hba *phba)
 	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);
+	lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
+			"2777 Start FCF table scan after FCF "
+			"rediscovery quiescent period over\n");
+	rc = lpfc_sli4_fcf_scan_read_fcf_rec(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_printf_log(phba, KERN_ERR, LOG_FIP | LOG_DISCOVERY,
+				"2747 Issue FCF scan read FCF mailbox "
+				"command failed 0x%x\n", rc);
 }
 
 /**
@@ -3651,6 +3857,13 @@ lpfc_sli_driver_resource_setup(struct lpfc_hba *phba)
 
 	/* Get all the module params for configuring this host */
 	lpfc_get_cfgparam(phba);
+	if (phba->pcidev->device == PCI_DEVICE_ID_HORNET) {
+		phba->menlo_flag |= HBA_MENLO_SUPPORT;
+		/* check for menlo minimum sg count */
+		if (phba->cfg_sg_seg_cnt < LPFC_DEFAULT_MENLO_SG_SEG_CNT)
+			phba->cfg_sg_seg_cnt = LPFC_DEFAULT_MENLO_SG_SEG_CNT;
+	}
+
 	/*
 	 * Since the sg_tablesize is module parameter, the sg_dma_buf_size
 	 * used to create the sg_dma_buf_pool must be dynamically calculated.
@@ -3722,6 +3935,7 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
 	int rc, i, hbq_count, buf_size, dma_buf_size, max_buf_size;
 	uint8_t pn_page[LPFC_MAX_SUPPORTED_PAGES] = {0};
 	struct lpfc_mqe *mqe;
+	int longs;
 
 	/* Before proceed, wait for POST done and device ready */
 	rc = lpfc_sli4_post_status_check(phba);
@@ -3867,6 +4081,43 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
 	if (unlikely(rc))
 		goto out_free_bsmbx;
 
+	mboxq = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool,
+						       GFP_KERNEL);
+	if (!mboxq) {
+		rc = -ENOMEM;
+		goto out_free_bsmbx;
+	}
+
+	/* Get the Supported Pages. It is always available. */
+	lpfc_supported_pages(mboxq);
+	rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
+	if (unlikely(rc)) {
+		rc = -EIO;
+		mempool_free(mboxq, phba->mbox_mem_pool);
+		goto out_free_bsmbx;
+	}
+
+	mqe = &mboxq->u.mqe;
+	memcpy(&pn_page[0], ((uint8_t *)&mqe->un.supp_pages.word3),
+	       LPFC_MAX_SUPPORTED_PAGES);
+	for (i = 0; i < LPFC_MAX_SUPPORTED_PAGES; i++) {
+		switch (pn_page[i]) {
+		case LPFC_SLI4_PARAMETERS:
+			phba->sli4_hba.pc_sli4_params.supported = 1;
+			break;
+		default:
+			break;
+		}
+	}
+
+	/* Read the port's SLI4 Parameters capabilities if supported. */
+	if (phba->sli4_hba.pc_sli4_params.supported)
+		rc = lpfc_pc_sli4_params_get(phba, mboxq);
+	mempool_free(mboxq, phba->mbox_mem_pool);
+	if (rc) {
+		rc = -EIO;
+		goto out_free_bsmbx;
+	}
 	/* Create all the SLI4 queues */
 	rc = lpfc_sli4_queue_create(phba);
 	if (rc)
@@ -3898,13 +4149,24 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
 		goto out_free_active_sgl;
 	}
 
+	/* Allocate eligible FCF bmask memory for FCF round robin failover */
+	longs = (LPFC_SLI4_FCF_TBL_INDX_MAX + BITS_PER_LONG - 1)/BITS_PER_LONG;
+	phba->fcf.fcf_rr_bmask = kzalloc(longs * sizeof(unsigned long),
+					 GFP_KERNEL);
+	if (!phba->fcf.fcf_rr_bmask) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+				"2759 Failed allocate memory for FCF round "
+				"robin failover bmask\n");
+		goto out_remove_rpi_hdrs;
+	}
+
 	phba->sli4_hba.fcp_eq_hdl = kzalloc((sizeof(struct lpfc_fcp_eq_hdl) *
 				    phba->cfg_fcp_eq_count), GFP_KERNEL);
 	if (!phba->sli4_hba.fcp_eq_hdl) {
 		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
 				"2572 Failed allocate memory for fast-path "
 				"per-EQ handle array\n");
-		goto out_remove_rpi_hdrs;
+		goto out_free_fcf_rr_bmask;
 	}
 
 	phba->sli4_hba.msix_entries = kzalloc((sizeof(struct msix_entry) *
@@ -3916,47 +4178,12 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
 		goto out_free_fcp_eq_hdl;
 	}
 
-	mboxq = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool,
-						       GFP_KERNEL);
-	if (!mboxq) {
-		rc = -ENOMEM;
-		goto out_free_fcp_eq_hdl;
-	}
-
-	/* Get the Supported Pages. It is always available. */
-	lpfc_supported_pages(mboxq);
-	rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
-	if (unlikely(rc)) {
-		rc = -EIO;
-		mempool_free(mboxq, phba->mbox_mem_pool);
-		goto out_free_fcp_eq_hdl;
-	}
-
-	mqe = &mboxq->u.mqe;
-	memcpy(&pn_page[0], ((uint8_t *)&mqe->un.supp_pages.word3),
-	       LPFC_MAX_SUPPORTED_PAGES);
-	for (i = 0; i < LPFC_MAX_SUPPORTED_PAGES; i++) {
-		switch (pn_page[i]) {
-		case LPFC_SLI4_PARAMETERS:
-			phba->sli4_hba.pc_sli4_params.supported = 1;
-			break;
-		default:
-			break;
-		}
-	}
-
-	/* Read the port's SLI4 Parameters capabilities if supported. */
-	if (phba->sli4_hba.pc_sli4_params.supported)
-		rc = lpfc_pc_sli4_params_get(phba, mboxq);
-	mempool_free(mboxq, phba->mbox_mem_pool);
-	if (rc) {
-		rc = -EIO;
-		goto out_free_fcp_eq_hdl;
-	}
 	return rc;
 
 out_free_fcp_eq_hdl:
 	kfree(phba->sli4_hba.fcp_eq_hdl);
+out_free_fcf_rr_bmask:
+	kfree(phba->fcf.fcf_rr_bmask);
 out_remove_rpi_hdrs:
 	lpfc_sli4_remove_rpi_hdrs(phba);
 out_free_active_sgl:
@@ -4002,6 +4229,9 @@ lpfc_sli4_driver_resource_unset(struct lpfc_hba *phba)
 	lpfc_sli4_remove_rpi_hdrs(phba);
 	lpfc_sli4_remove_rpis(phba);
 
+	/* Free eligible FCF index bmask */
+	kfree(phba->fcf.fcf_rr_bmask);
+
 	/* Free the ELS sgl list */
 	lpfc_free_active_sgl(phba);
 	lpfc_free_sgl_list(phba);
@@ -4397,6 +4627,7 @@ lpfc_init_sgl_list(struct lpfc_hba *phba)
 
 		/* The list order is used by later block SGL registraton */
 		spin_lock_irq(&phba->hbalock);
+		sglq_entry->state = SGL_FREED;
 		list_add_tail(&sglq_entry->list, &phba->sli4_hba.lpfc_sgl_list);
 		phba->sli4_hba.lpfc_els_sgl_array[i] = sglq_entry;
 		phba->sli4_hba.total_sglq_bufs++;
@@ -4870,6 +5101,8 @@ lpfc_sli_pci_mem_setup(struct lpfc_hba *phba)
 
 	memset(phba->slim2p.virt, 0, SLI2_SLIM_SIZE);
 	phba->mbox = phba->slim2p.virt + offsetof(struct lpfc_sli2_slim, mbx);
+	phba->mbox_ext = (phba->slim2p.virt +
+		offsetof(struct lpfc_sli2_slim, mbx_ext_words));
 	phba->pcb = (phba->slim2p.virt + offsetof(struct lpfc_sli2_slim, pcb));
 	phba->IOCBs = (phba->slim2p.virt +
 		       offsetof(struct lpfc_sli2_slim, IOCBs));
@@ -7573,21 +7806,23 @@ lpfc_pci_resume_one_s3(struct pci_dev *pdev)
  * @phba: pointer to lpfc hba data structure.
  *
  * This routine is called to prepare the SLI3 device for PCI slot recover. It
- * aborts and stops all the on-going I/Os on the pci device.
+ * aborts all the outstanding SCSI I/Os to the pci device.
  **/
 static void
 lpfc_sli_prep_dev_for_recover(struct lpfc_hba *phba)
 {
+	struct lpfc_sli *psli = &phba->sli;
+	struct lpfc_sli_ring  *pring;
+
 	lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
 			"2723 PCI channel I/O abort preparing for recovery\n");
-	/* Prepare for bringing HBA offline */
-	lpfc_offline_prep(phba);
-	/* Clear sli active flag to prevent sysfs access to HBA */
-	spin_lock_irq(&phba->hbalock);
-	phba->sli.sli_flag &= ~LPFC_SLI_ACTIVE;
-	spin_unlock_irq(&phba->hbalock);
-	/* Stop and flush all I/Os and bring HBA offline */
-	lpfc_offline(phba);
+
+	/*
+	 * There may be errored I/Os through HBA, abort all I/Os on txcmplq
+	 * and let the SCSI mid-layer to retry them to recover.
+	 */
+	pring = &psli->ring[psli->fcp_ring];
+	lpfc_sli_abort_iocb_ring(phba, pring);
 }
 
 /**
@@ -7601,21 +7836,20 @@ lpfc_sli_prep_dev_for_recover(struct lpfc_hba *phba)
 static void
 lpfc_sli_prep_dev_for_reset(struct lpfc_hba *phba)
 {
-	struct lpfc_sli *psli = &phba->sli;
-	struct lpfc_sli_ring  *pring;
-
 	lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
 			"2710 PCI channel disable preparing for reset\n");
+
+	/* Block all SCSI devices' I/Os on the host */
+	lpfc_scsi_dev_block(phba);
+
+	/* stop all timers */
+	lpfc_stop_hba_timers(phba);
+
 	/* Disable interrupt and pci device */
 	lpfc_sli_disable_intr(phba);
 	pci_disable_device(phba->pcidev);
-	/*
-	 * There may be I/Os dropped by the firmware.
-	 * Error iocb (I/O) on txcmplq and let the SCSI layer
-	 * retry it after re-establishing link.
-	 */
-	pring = &psli->ring[psli->fcp_ring];
-	lpfc_sli_abort_iocb_ring(phba, pring);
+	/* Flush all driver's outstanding SCSI I/Os as we are to reset */
+	lpfc_sli_flush_fcp_rings(phba);
 }
 
 /**
@@ -7631,6 +7865,12 @@ lpfc_prep_dev_for_perm_failure(struct lpfc_hba *phba)
 {
 	lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
 			"2711 PCI channel permanent disable for failure\n");
+	/* Block all SCSI devices' I/Os on the host */
+	lpfc_scsi_dev_block(phba);
+
+	/* stop all timers */
+	lpfc_stop_hba_timers(phba);
+
 	/* Clean up all driver's outstanding SCSI I/Os */
 	lpfc_sli_flush_fcp_rings(phba);
 }
@@ -7659,9 +7899,6 @@ lpfc_io_error_detected_s3(struct pci_dev *pdev, pci_channel_state_t state)
 	struct Scsi_Host *shost = pci_get_drvdata(pdev);
 	struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
 
-	/* Block all SCSI devices' I/Os on the host */
-	lpfc_scsi_dev_block(phba);
-
 	switch (state) {
 	case pci_channel_io_normal:
 		/* Non-fatal error, prepare for recovery */
@@ -7768,7 +8005,7 @@ lpfc_io_resume_s3(struct pci_dev *pdev)
 	struct Scsi_Host *shost = pci_get_drvdata(pdev);
 	struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
 
-	/* Bring the device online */
+	/* Bring device online, it will be no-op for non-fatal error resume */
 	lpfc_online(phba);
 
 	/* Clean up Advanced Error Reporting (AER) if needed */