Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 12272 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
new file mode 100644
index 000000000..6b5ce9869
--- /dev/null
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -0,0 +1,12272 @@
+/*******************************************************************
+ * This file is part of the Emulex Linux Device Driver for         *
+ * Fibre Channel Host Bus Adapters.                                *
+ * Copyright (C) 2017-2022 Broadcom. All Rights Reserved. The term *
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
+ * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
+ * EMULEX and SLI are trademarks of Emulex.                        *
+ * www.broadcom.com                                                *
+ * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
+ *                                                                 *
+ * This program is free software; you can redistribute it and/or   *
+ * modify it under the terms of version 2 of the GNU General       *
+ * Public License as published by the Free Software Foundation.    *
+ * This program is distributed in the hope that it will be useful. *
+ * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
+ * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
+ * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
+ * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
+ * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
+ * more details, a copy of which can be found in the file COPYING  *
+ * included with this package.                                     *
+ *******************************************************************/
+/* See Fibre Channel protocol T11 FC-LS for details */
+#include <linux/blkdev.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_transport_fc.h>
+#include <uapi/scsi/fc/fc_fs.h>
+#include <uapi/scsi/fc/fc_els.h>
+
+#include "lpfc_hw4.h"
+#include "lpfc_hw.h"
+#include "lpfc_sli.h"
+#include "lpfc_sli4.h"
+#include "lpfc_nl.h"
+#include "lpfc_disc.h"
+#include "lpfc_scsi.h"
+#include "lpfc.h"
+#include "lpfc_logmsg.h"
+#include "lpfc_crtn.h"
+#include "lpfc_vport.h"
+#include "lpfc_debugfs.h"
+
+static int lpfc_els_retry(struct lpfc_hba *, struct lpfc_iocbq *,
+			  struct lpfc_iocbq *);
+static void lpfc_cmpl_fabric_iocb(struct lpfc_hba *, struct lpfc_iocbq *,
+			struct lpfc_iocbq *);
+static void lpfc_fabric_abort_vport(struct lpfc_vport *vport);
+static int lpfc_issue_els_fdisc(struct lpfc_vport *vport,
+				struct lpfc_nodelist *ndlp, uint8_t retry);
+static int lpfc_issue_fabric_iocb(struct lpfc_hba *phba,
+				  struct lpfc_iocbq *iocb);
+static void lpfc_cmpl_els_edc(struct lpfc_hba *phba,
+			      struct lpfc_iocbq *cmdiocb,
+			      struct lpfc_iocbq *rspiocb);
+static void lpfc_cmpl_els_uvem(struct lpfc_hba *, struct lpfc_iocbq *,
+			       struct lpfc_iocbq *);
+
+static int lpfc_max_els_tries = 3;
+
+static void lpfc_init_cs_ctl_bitmap(struct lpfc_vport *vport);
+static void lpfc_vmid_set_cs_ctl_range(struct lpfc_vport *vport, u32 min, u32 max);
+static void lpfc_vmid_put_cs_ctl(struct lpfc_vport *vport, u32 ctcl_vmid);
+
+/**
+ * lpfc_els_chk_latt - Check host link attention event for a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine checks whether there is an outstanding host link
+ * attention event during the discovery process with the @vport. It is done
+ * by reading the HBA's Host Attention (HA) register. If there is any host
+ * link attention events during this @vport's discovery process, the @vport
+ * shall be marked as FC_ABORT_DISCOVERY, a host link attention clear shall
+ * be issued if the link state is not already in host link cleared state,
+ * and a return code shall indicate whether the host link attention event
+ * had happened.
+ *
+ * Note that, if either the host link is in state LPFC_LINK_DOWN or @vport
+ * state in LPFC_VPORT_READY, the request for checking host link attention
+ * event will be ignored and a return code shall indicate no host link
+ * attention event had happened.
+ *
+ * Return codes
+ *   0 - no host link attention event happened
+ *   1 - host link attention event happened
+ **/
+int
+lpfc_els_chk_latt(struct lpfc_vport *vport)
+{
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_hba  *phba = vport->phba;
+	uint32_t ha_copy;
+
+	if (vport->port_state >= LPFC_VPORT_READY ||
+	    phba->link_state == LPFC_LINK_DOWN ||
+	    phba->sli_rev > LPFC_SLI_REV3)
+		return 0;
+
+	/* Read the HBA Host Attention Register */
+	if (lpfc_readl(phba->HAregaddr, &ha_copy))
+		return 1;
+
+	if (!(ha_copy & HA_LATT))
+		return 0;
+
+	/* Pending Link Event during Discovery */
+	lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+			 "0237 Pending Link Event during "
+			 "Discovery: State x%x\n",
+			 phba->pport->port_state);
+
+	/* CLEAR_LA should re-enable link attention events and
+	 * we should then immediately take a LATT event. The
+	 * LATT processing should call lpfc_linkdown() which
+	 * will cleanup any left over in-progress discovery
+	 * events.
+	 */
+	spin_lock_irq(shost->host_lock);
+	vport->fc_flag |= FC_ABORT_DISCOVERY;
+	spin_unlock_irq(shost->host_lock);
+
+	if (phba->link_state != LPFC_CLEAR_LA)
+		lpfc_issue_clear_la(phba, vport);
+
+	return 1;
+}
+
+/**
+ * lpfc_prep_els_iocb - Allocate and prepare a lpfc iocb data structure
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @expect_rsp: flag indicating whether response is expected.
+ * @cmd_size: size of the ELS command.
+ * @retry: number of retries to the command when it fails.
+ * @ndlp: pointer to a node-list data structure.
+ * @did: destination identifier.
+ * @elscmd: the ELS command code.
+ *
+ * This routine is used for allocating a lpfc-IOCB data structure from
+ * the driver lpfc-IOCB free-list and prepare the IOCB with the parameters
+ * passed into the routine for discovery state machine to issue an Extended
+ * Link Service (ELS) commands. It is a generic lpfc-IOCB allocation
+ * and preparation routine that is used by all the discovery state machine
+ * routines and the ELS command-specific fields will be later set up by
+ * the individual discovery machine routines after calling this routine
+ * allocating and preparing a generic IOCB data structure. It fills in the
+ * Buffer Descriptor Entries (BDEs), allocates buffers for both command
+ * payload and response payload (if expected). The reference count on the
+ * ndlp is incremented by 1 and the reference to the ndlp is put into
+ * ndlp of the IOCB data structure for this IOCB to hold the ndlp
+ * reference for the command's callback function to access later.
+ *
+ * Return code
+ *   Pointer to the newly allocated/prepared els iocb data structure
+ *   NULL - when els iocb data structure allocation/preparation failed
+ **/
+struct lpfc_iocbq *
+lpfc_prep_els_iocb(struct lpfc_vport *vport, u8 expect_rsp,
+		   u16 cmd_size, u8 retry,
+		   struct lpfc_nodelist *ndlp, u32 did,
+		   u32 elscmd)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	struct lpfc_iocbq *elsiocb;
+	struct lpfc_dmabuf *pcmd, *prsp, *pbuflist, *bmp;
+	struct ulp_bde64_le *bpl;
+	u32 timeout = 0;
+
+	if (!lpfc_is_link_up(phba))
+		return NULL;
+
+	/* Allocate buffer for  command iocb */
+	elsiocb = lpfc_sli_get_iocbq(phba);
+	if (!elsiocb)
+		return NULL;
+
+	/*
+	 * If this command is for fabric controller and HBA running
+	 * in FIP mode send FLOGI, FDISC and LOGO as FIP frames.
+	 */
+	if ((did == Fabric_DID) &&
+	    (phba->hba_flag & HBA_FIP_SUPPORT) &&
+	    ((elscmd == ELS_CMD_FLOGI) ||
+	     (elscmd == ELS_CMD_FDISC) ||
+	     (elscmd == ELS_CMD_LOGO)))
+		switch (elscmd) {
+		case ELS_CMD_FLOGI:
+			elsiocb->cmd_flag |=
+				((LPFC_ELS_ID_FLOGI << LPFC_FIP_ELS_ID_SHIFT)
+				 & LPFC_FIP_ELS_ID_MASK);
+			break;
+		case ELS_CMD_FDISC:
+			elsiocb->cmd_flag |=
+				((LPFC_ELS_ID_FDISC << LPFC_FIP_ELS_ID_SHIFT)
+				 & LPFC_FIP_ELS_ID_MASK);
+			break;
+		case ELS_CMD_LOGO:
+			elsiocb->cmd_flag |=
+				((LPFC_ELS_ID_LOGO << LPFC_FIP_ELS_ID_SHIFT)
+				 & LPFC_FIP_ELS_ID_MASK);
+			break;
+		}
+	else
+		elsiocb->cmd_flag &= ~LPFC_FIP_ELS_ID_MASK;
+
+	/* fill in BDEs for command */
+	/* Allocate buffer for command payload */
+	pcmd = kmalloc(sizeof(*pcmd), GFP_KERNEL);
+	if (pcmd)
+		pcmd->virt = lpfc_mbuf_alloc(phba, MEM_PRI, &pcmd->phys);
+	if (!pcmd || !pcmd->virt)
+		goto els_iocb_free_pcmb_exit;
+
+	INIT_LIST_HEAD(&pcmd->list);
+
+	/* Allocate buffer for response payload */
+	if (expect_rsp) {
+		prsp = kmalloc(sizeof(*prsp), GFP_KERNEL);
+		if (prsp)
+			prsp->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
+						     &prsp->phys);
+		if (!prsp || !prsp->virt)
+			goto els_iocb_free_prsp_exit;
+		INIT_LIST_HEAD(&prsp->list);
+	} else {
+		prsp = NULL;
+	}
+
+	/* Allocate buffer for Buffer ptr list */
+	pbuflist = kmalloc(sizeof(*pbuflist), GFP_KERNEL);
+	if (pbuflist)
+		pbuflist->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
+						 &pbuflist->phys);
+	if (!pbuflist || !pbuflist->virt)
+		goto els_iocb_free_pbuf_exit;
+
+	INIT_LIST_HEAD(&pbuflist->list);
+
+	if (expect_rsp) {
+		switch (elscmd) {
+		case ELS_CMD_FLOGI:
+			timeout = FF_DEF_RATOV * 2;
+			break;
+		case ELS_CMD_LOGO:
+			timeout = phba->fc_ratov;
+			break;
+		default:
+			timeout = phba->fc_ratov * 2;
+		}
+
+		/* Fill SGE for the num bde count */
+		elsiocb->num_bdes = 2;
+	}
+
+	if (phba->sli_rev == LPFC_SLI_REV4)
+		bmp = pcmd;
+	else
+		bmp = pbuflist;
+
+	lpfc_sli_prep_els_req_rsp(phba, elsiocb, vport, bmp, cmd_size, did,
+				  elscmd, timeout, expect_rsp);
+
+	bpl = (struct ulp_bde64_le *)pbuflist->virt;
+	bpl->addr_low = cpu_to_le32(putPaddrLow(pcmd->phys));
+	bpl->addr_high = cpu_to_le32(putPaddrHigh(pcmd->phys));
+	bpl->type_size = cpu_to_le32(cmd_size);
+	bpl->type_size |= cpu_to_le32(ULP_BDE64_TYPE_BDE_64);
+
+	if (expect_rsp) {
+		bpl++;
+		bpl->addr_low = cpu_to_le32(putPaddrLow(prsp->phys));
+		bpl->addr_high = cpu_to_le32(putPaddrHigh(prsp->phys));
+		bpl->type_size = cpu_to_le32(FCELSSIZE);
+		bpl->type_size |= cpu_to_le32(ULP_BDE64_TYPE_BDE_64);
+	}
+
+	elsiocb->cmd_dmabuf = pcmd;
+	elsiocb->bpl_dmabuf = pbuflist;
+	elsiocb->retry = retry;
+	elsiocb->vport = vport;
+	elsiocb->drvrTimeout = (phba->fc_ratov << 1) + LPFC_DRVR_TIMEOUT;
+
+	if (prsp)
+		list_add(&prsp->list, &pcmd->list);
+	if (expect_rsp) {
+		/* Xmit ELS command <elsCmd> to remote NPORT <did> */
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+				 "0116 Xmit ELS command x%x to remote "
+				 "NPORT x%x I/O tag: x%x, port state:x%x "
+				 "rpi x%x fc_flag:x%x\n",
+				 elscmd, did, elsiocb->iotag,
+				 vport->port_state, ndlp->nlp_rpi,
+				 vport->fc_flag);
+	} else {
+		/* Xmit ELS response <elsCmd> to remote NPORT <did> */
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+				 "0117 Xmit ELS response x%x to remote "
+				 "NPORT x%x I/O tag: x%x, size: x%x "
+				 "port_state x%x  rpi x%x fc_flag x%x\n",
+				 elscmd, ndlp->nlp_DID, elsiocb->iotag,
+				 cmd_size, vport->port_state,
+				 ndlp->nlp_rpi, vport->fc_flag);
+	}
+
+	return elsiocb;
+
+els_iocb_free_pbuf_exit:
+	if (expect_rsp)
+		lpfc_mbuf_free(phba, prsp->virt, prsp->phys);
+	kfree(pbuflist);
+
+els_iocb_free_prsp_exit:
+	lpfc_mbuf_free(phba, pcmd->virt, pcmd->phys);
+	kfree(prsp);
+
+els_iocb_free_pcmb_exit:
+	kfree(pcmd);
+	lpfc_sli_release_iocbq(phba, elsiocb);
+	return NULL;
+}
+
+/**
+ * lpfc_issue_fabric_reglogin - Issue fabric registration login for a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine issues a fabric registration login for a @vport. An
+ * active ndlp node with Fabric_DID must already exist for this @vport.
+ * The routine invokes two mailbox commands to carry out fabric registration
+ * login through the HBA firmware: the first mailbox command requests the
+ * HBA to perform link configuration for the @vport; and the second mailbox
+ * command requests the HBA to perform the actual fabric registration login
+ * with the @vport.
+ *
+ * Return code
+ *   0 - successfully issued fabric registration login for @vport
+ *   -ENXIO -- failed to issue fabric registration login for @vport
+ **/
+int
+lpfc_issue_fabric_reglogin(struct lpfc_vport *vport)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	LPFC_MBOXQ_t *mbox;
+	struct lpfc_nodelist *ndlp;
+	struct serv_parm *sp;
+	int rc;
+	int err = 0;
+
+	sp = &phba->fc_fabparam;
+	ndlp = lpfc_findnode_did(vport, Fabric_DID);
+	if (!ndlp) {
+		err = 1;
+		goto fail;
+	}
+
+	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+	if (!mbox) {
+		err = 2;
+		goto fail;
+	}
+
+	vport->port_state = LPFC_FABRIC_CFG_LINK;
+	lpfc_config_link(phba, mbox);
+	mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
+	mbox->vport = vport;
+
+	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
+	if (rc == MBX_NOT_FINISHED) {
+		err = 3;
+		goto fail_free_mbox;
+	}
+
+	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+	if (!mbox) {
+		err = 4;
+		goto fail;
+	}
+	rc = lpfc_reg_rpi(phba, vport->vpi, Fabric_DID, (uint8_t *)sp, mbox,
+			  ndlp->nlp_rpi);
+	if (rc) {
+		err = 5;
+		goto fail_free_mbox;
+	}
+
+	mbox->mbox_cmpl = lpfc_mbx_cmpl_fabric_reg_login;
+	mbox->vport = vport;
+	/* increment the reference count on ndlp to hold reference
+	 * for the callback routine.
+	 */
+	mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
+	if (!mbox->ctx_ndlp) {
+		err = 6;
+		goto fail_free_mbox;
+	}
+
+	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
+	if (rc == MBX_NOT_FINISHED) {
+		err = 7;
+		goto fail_issue_reg_login;
+	}
+
+	return 0;
+
+fail_issue_reg_login:
+	/* decrement the reference count on ndlp just incremented
+	 * for the failed mbox command.
+	 */
+	lpfc_nlp_put(ndlp);
+fail_free_mbox:
+	lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
+fail:
+	lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+	lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+			 "0249 Cannot issue Register Fabric login: Err %d\n",
+			 err);
+	return -ENXIO;
+}
+
+/**
+ * lpfc_issue_reg_vfi - Register VFI for this vport's fabric login
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine issues a REG_VFI mailbox for the vfi, vpi, fcfi triplet for
+ * the @vport. This mailbox command is necessary for SLI4 port only.
+ *
+ * Return code
+ *   0 - successfully issued REG_VFI for @vport
+ *   A failure code otherwise.
+ **/
+int
+lpfc_issue_reg_vfi(struct lpfc_vport *vport)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	LPFC_MBOXQ_t *mboxq = NULL;
+	struct lpfc_nodelist *ndlp;
+	struct lpfc_dmabuf *dmabuf = NULL;
+	int rc = 0;
+
+	/* move forward in case of SLI4 FC port loopback test and pt2pt mode */
+	if ((phba->sli_rev == LPFC_SLI_REV4) &&
+	    !(phba->link_flag & LS_LOOPBACK_MODE) &&
+	    !(vport->fc_flag & FC_PT2PT)) {
+		ndlp = lpfc_findnode_did(vport, Fabric_DID);
+		if (!ndlp) {
+			rc = -ENODEV;
+			goto fail;
+		}
+	}
+
+	mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+	if (!mboxq) {
+		rc = -ENOMEM;
+		goto fail;
+	}
+
+	/* Supply CSP's only if we are fabric connect or pt-to-pt connect */
+	if ((vport->fc_flag & FC_FABRIC) || (vport->fc_flag & FC_PT2PT)) {
+		rc = lpfc_mbox_rsrc_prep(phba, mboxq);
+		if (rc) {
+			rc = -ENOMEM;
+			goto fail_mbox;
+		}
+		dmabuf = mboxq->ctx_buf;
+		memcpy(dmabuf->virt, &phba->fc_fabparam,
+		       sizeof(struct serv_parm));
+	}
+
+	vport->port_state = LPFC_FABRIC_CFG_LINK;
+	if (dmabuf) {
+		lpfc_reg_vfi(mboxq, vport, dmabuf->phys);
+		/* lpfc_reg_vfi memsets the mailbox.  Restore the ctx_buf. */
+		mboxq->ctx_buf = dmabuf;
+	} else {
+		lpfc_reg_vfi(mboxq, vport, 0);
+	}
+
+	mboxq->mbox_cmpl = lpfc_mbx_cmpl_reg_vfi;
+	mboxq->vport = vport;
+	rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
+	if (rc == MBX_NOT_FINISHED) {
+		rc = -ENXIO;
+		goto fail_mbox;
+	}
+	return 0;
+
+fail_mbox:
+	lpfc_mbox_rsrc_cleanup(phba, mboxq, MBOX_THD_UNLOCKED);
+fail:
+	lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+	lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+			 "0289 Issue Register VFI failed: Err %d\n", rc);
+	return rc;
+}
+
+/**
+ * lpfc_issue_unreg_vfi - Unregister VFI for this vport's fabric login
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine issues a UNREG_VFI mailbox with the vfi, vpi, fcfi triplet for
+ * the @vport. This mailbox command is necessary for SLI4 port only.
+ *
+ * Return code
+ *   0 - successfully issued REG_VFI for @vport
+ *   A failure code otherwise.
+ **/
+int
+lpfc_issue_unreg_vfi(struct lpfc_vport *vport)
+{
+	struct lpfc_hba *phba = vport->phba;
+	struct Scsi_Host *shost;
+	LPFC_MBOXQ_t *mboxq;
+	int rc;
+
+	mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+	if (!mboxq) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
+				"2556 UNREG_VFI mbox allocation failed"
+				"HBA state x%x\n", phba->pport->port_state);
+		return -ENOMEM;
+	}
+
+	lpfc_unreg_vfi(mboxq, vport);
+	mboxq->vport = vport;
+	mboxq->mbox_cmpl = lpfc_unregister_vfi_cmpl;
+
+	rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
+	if (rc == MBX_NOT_FINISHED) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
+				"2557 UNREG_VFI issue mbox failed rc x%x "
+				"HBA state x%x\n",
+				rc, phba->pport->port_state);
+		mempool_free(mboxq, phba->mbox_mem_pool);
+		return -EIO;
+	}
+
+	shost = lpfc_shost_from_vport(vport);
+	spin_lock_irq(shost->host_lock);
+	vport->fc_flag &= ~FC_VFI_REGISTERED;
+	spin_unlock_irq(shost->host_lock);
+	return 0;
+}
+
+/**
+ * lpfc_check_clean_addr_bit - Check whether assigned FCID is clean.
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @sp: pointer to service parameter data structure.
+ *
+ * This routine is called from FLOGI/FDISC completion handler functions.
+ * lpfc_check_clean_addr_bit return 1 when FCID/Fabric portname/ Fabric
+ * node nodename is changed in the completion service parameter else return
+ * 0. This function also set flag in the vport data structure to delay
+ * NP_Port discovery after the FLOGI/FDISC completion if Clean address bit
+ * in FLOGI/FDISC response is cleared and FCID/Fabric portname/ Fabric
+ * node nodename is changed in the completion service parameter.
+ *
+ * Return code
+ *   0 - FCID and Fabric Nodename and Fabric portname is not changed.
+ *   1 - FCID or Fabric Nodename or Fabric portname is changed.
+ *
+ **/
+static uint8_t
+lpfc_check_clean_addr_bit(struct lpfc_vport *vport,
+		struct serv_parm *sp)
+{
+	struct lpfc_hba *phba = vport->phba;
+	uint8_t fabric_param_changed = 0;
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+
+	if ((vport->fc_prevDID != vport->fc_myDID) ||
+		memcmp(&vport->fabric_portname, &sp->portName,
+			sizeof(struct lpfc_name)) ||
+		memcmp(&vport->fabric_nodename, &sp->nodeName,
+			sizeof(struct lpfc_name)) ||
+		(vport->vport_flag & FAWWPN_PARAM_CHG)) {
+		fabric_param_changed = 1;
+		vport->vport_flag &= ~FAWWPN_PARAM_CHG;
+	}
+	/*
+	 * Word 1 Bit 31 in common service parameter is overloaded.
+	 * Word 1 Bit 31 in FLOGI request is multiple NPort request
+	 * Word 1 Bit 31 in FLOGI response is clean address bit
+	 *
+	 * If fabric parameter is changed and clean address bit is
+	 * cleared delay nport discovery if
+	 * - vport->fc_prevDID != 0 (not initial discovery) OR
+	 * - lpfc_delay_discovery module parameter is set.
+	 */
+	if (fabric_param_changed && !sp->cmn.clean_address_bit &&
+	    (vport->fc_prevDID || phba->cfg_delay_discovery)) {
+		spin_lock_irq(shost->host_lock);
+		vport->fc_flag |= FC_DISC_DELAYED;
+		spin_unlock_irq(shost->host_lock);
+	}
+
+	return fabric_param_changed;
+}
+
+
+/**
+ * lpfc_cmpl_els_flogi_fabric - Completion function for flogi to a fabric port
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @ndlp: pointer to a node-list data structure.
+ * @sp: pointer to service parameter data structure.
+ * @ulp_word4: command response value
+ *
+ * This routine is invoked by the lpfc_cmpl_els_flogi() completion callback
+ * function to handle the completion of a Fabric Login (FLOGI) into a fabric
+ * port in a fabric topology. It properly sets up the parameters to the @ndlp
+ * from the IOCB response. It also check the newly assigned N_Port ID to the
+ * @vport against the previously assigned N_Port ID. If it is different from
+ * the previously assigned Destination ID (DID), the lpfc_unreg_rpi() routine
+ * is invoked on all the remaining nodes with the @vport to unregister the
+ * Remote Port Indicators (RPIs). Finally, the lpfc_issue_fabric_reglogin()
+ * is invoked to register login to the fabric.
+ *
+ * Return code
+ *   0 - Success (currently, always return 0)
+ **/
+static int
+lpfc_cmpl_els_flogi_fabric(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
+			   struct serv_parm *sp, uint32_t ulp_word4)
+{
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_hba  *phba = vport->phba;
+	struct lpfc_nodelist *np;
+	struct lpfc_nodelist *next_np;
+	uint8_t fabric_param_changed;
+
+	spin_lock_irq(shost->host_lock);
+	vport->fc_flag |= FC_FABRIC;
+	spin_unlock_irq(shost->host_lock);
+
+	phba->fc_edtov = be32_to_cpu(sp->cmn.e_d_tov);
+	if (sp->cmn.edtovResolution)	/* E_D_TOV ticks are in nanoseconds */
+		phba->fc_edtov = (phba->fc_edtov + 999999) / 1000000;
+
+	phba->fc_edtovResol = sp->cmn.edtovResolution;
+	phba->fc_ratov = (be32_to_cpu(sp->cmn.w2.r_a_tov) + 999) / 1000;
+
+	if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
+		spin_lock_irq(shost->host_lock);
+		vport->fc_flag |= FC_PUBLIC_LOOP;
+		spin_unlock_irq(shost->host_lock);
+	}
+
+	vport->fc_myDID = ulp_word4 & Mask_DID;
+	memcpy(&ndlp->nlp_portname, &sp->portName, sizeof(struct lpfc_name));
+	memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof(struct lpfc_name));
+	ndlp->nlp_class_sup = 0;
+	if (sp->cls1.classValid)
+		ndlp->nlp_class_sup |= FC_COS_CLASS1;
+	if (sp->cls2.classValid)
+		ndlp->nlp_class_sup |= FC_COS_CLASS2;
+	if (sp->cls3.classValid)
+		ndlp->nlp_class_sup |= FC_COS_CLASS3;
+	if (sp->cls4.classValid)
+		ndlp->nlp_class_sup |= FC_COS_CLASS4;
+	ndlp->nlp_maxframe = ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) |
+				sp->cmn.bbRcvSizeLsb;
+
+	fabric_param_changed = lpfc_check_clean_addr_bit(vport, sp);
+	if (fabric_param_changed) {
+		/* Reset FDMI attribute masks based on config parameter */
+		if (phba->cfg_enable_SmartSAN ||
+		    (phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) {
+			/* Setup appropriate attribute masks */
+			vport->fdmi_hba_mask = LPFC_FDMI2_HBA_ATTR;
+			if (phba->cfg_enable_SmartSAN)
+				vport->fdmi_port_mask = LPFC_FDMI2_SMART_ATTR;
+			else
+				vport->fdmi_port_mask = LPFC_FDMI2_PORT_ATTR;
+		} else {
+			vport->fdmi_hba_mask = 0;
+			vport->fdmi_port_mask = 0;
+		}
+
+	}
+	memcpy(&vport->fabric_portname, &sp->portName,
+			sizeof(struct lpfc_name));
+	memcpy(&vport->fabric_nodename, &sp->nodeName,
+			sizeof(struct lpfc_name));
+	memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
+
+	if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
+		if (sp->cmn.response_multiple_NPort) {
+			lpfc_printf_vlog(vport, KERN_WARNING,
+					 LOG_ELS | LOG_VPORT,
+					 "1816 FLOGI NPIV supported, "
+					 "response data 0x%x\n",
+					 sp->cmn.response_multiple_NPort);
+			spin_lock_irq(&phba->hbalock);
+			phba->link_flag |= LS_NPIV_FAB_SUPPORTED;
+			spin_unlock_irq(&phba->hbalock);
+		} else {
+			/* Because we asked f/w for NPIV it still expects us
+			to call reg_vnpid at least for the physical host */
+			lpfc_printf_vlog(vport, KERN_WARNING,
+					 LOG_ELS | LOG_VPORT,
+					 "1817 Fabric does not support NPIV "
+					 "- configuring single port mode.\n");
+			spin_lock_irq(&phba->hbalock);
+			phba->link_flag &= ~LS_NPIV_FAB_SUPPORTED;
+			spin_unlock_irq(&phba->hbalock);
+		}
+	}
+
+	/*
+	 * For FC we need to do some special processing because of the SLI
+	 * Port's default settings of the Common Service Parameters.
+	 */
+	if ((phba->sli_rev == LPFC_SLI_REV4) &&
+	    (phba->sli4_hba.lnk_info.lnk_tp == LPFC_LNK_TYPE_FC)) {
+		/* If physical FC port changed, unreg VFI and ALL VPIs / RPIs */
+		if (fabric_param_changed)
+			lpfc_unregister_fcf_prep(phba);
+
+		/* This should just update the VFI CSPs*/
+		if (vport->fc_flag & FC_VFI_REGISTERED)
+			lpfc_issue_reg_vfi(vport);
+	}
+
+	if (fabric_param_changed &&
+		!(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
+
+		/* If our NportID changed, we need to ensure all
+		 * remaining NPORTs get unreg_login'ed.
+		 */
+		list_for_each_entry_safe(np, next_np,
+					&vport->fc_nodes, nlp_listp) {
+			if ((np->nlp_state != NLP_STE_NPR_NODE) ||
+				   !(np->nlp_flag & NLP_NPR_ADISC))
+				continue;
+			spin_lock_irq(&np->lock);
+			np->nlp_flag &= ~NLP_NPR_ADISC;
+			spin_unlock_irq(&np->lock);
+			lpfc_unreg_rpi(vport, np);
+		}
+		lpfc_cleanup_pending_mbox(vport);
+
+		if (phba->sli_rev == LPFC_SLI_REV4) {
+			lpfc_sli4_unreg_all_rpis(vport);
+			lpfc_mbx_unreg_vpi(vport);
+			spin_lock_irq(shost->host_lock);
+			vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
+			spin_unlock_irq(shost->host_lock);
+		}
+
+		/*
+		 * For SLI3 and SLI4, the VPI needs to be reregistered in
+		 * response to this fabric parameter change event.
+		 */
+		spin_lock_irq(shost->host_lock);
+		vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
+		spin_unlock_irq(shost->host_lock);
+	} else if ((phba->sli_rev == LPFC_SLI_REV4) &&
+		!(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
+			/*
+			 * Driver needs to re-reg VPI in order for f/w
+			 * to update the MAC address.
+			 */
+			lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
+			lpfc_register_new_vport(phba, vport, ndlp);
+			return 0;
+	}
+
+	if (phba->sli_rev < LPFC_SLI_REV4) {
+		lpfc_nlp_set_state(vport, ndlp, NLP_STE_REG_LOGIN_ISSUE);
+		if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED &&
+		    vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)
+			lpfc_register_new_vport(phba, vport, ndlp);
+		else
+			lpfc_issue_fabric_reglogin(vport);
+	} else {
+		ndlp->nlp_type |= NLP_FABRIC;
+		lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
+		if ((!(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) &&
+			(vport->vpi_state & LPFC_VPI_REGISTERED)) {
+			lpfc_start_fdiscs(phba);
+			lpfc_do_scr_ns_plogi(phba, vport);
+		} else if (vport->fc_flag & FC_VFI_REGISTERED)
+			lpfc_issue_init_vpi(vport);
+		else {
+			lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+					"3135 Need register VFI: (x%x/%x)\n",
+					vport->fc_prevDID, vport->fc_myDID);
+			lpfc_issue_reg_vfi(vport);
+		}
+	}
+	return 0;
+}
+
+/**
+ * lpfc_cmpl_els_flogi_nport - Completion function for flogi to an N_Port
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @ndlp: pointer to a node-list data structure.
+ * @sp: pointer to service parameter data structure.
+ *
+ * This routine is invoked by the lpfc_cmpl_els_flogi() completion callback
+ * function to handle the completion of a Fabric Login (FLOGI) into an N_Port
+ * in a point-to-point topology. First, the @vport's N_Port Name is compared
+ * with the received N_Port Name: if the @vport's N_Port Name is greater than
+ * the received N_Port Name lexicographically, this node shall assign local
+ * N_Port ID (PT2PT_LocalID: 1) and remote N_Port ID (PT2PT_RemoteID: 2) and
+ * will send out Port Login (PLOGI) with the N_Port IDs assigned. Otherwise,
+ * this node shall just wait for the remote node to issue PLOGI and assign
+ * N_Port IDs.
+ *
+ * Return code
+ *   0 - Success
+ *   -ENXIO - Fail
+ **/
+static int
+lpfc_cmpl_els_flogi_nport(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
+			  struct serv_parm *sp)
+{
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_hba  *phba = vport->phba;
+	LPFC_MBOXQ_t *mbox;
+	int rc;
+
+	spin_lock_irq(shost->host_lock);
+	vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
+	vport->fc_flag |= FC_PT2PT;
+	spin_unlock_irq(shost->host_lock);
+
+	/* If we are pt2pt with another NPort, force NPIV off! */
+	phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;
+
+	/* If physical FC port changed, unreg VFI and ALL VPIs / RPIs */
+	if ((phba->sli_rev == LPFC_SLI_REV4) && phba->fc_topology_changed) {
+		lpfc_unregister_fcf_prep(phba);
+
+		spin_lock_irq(shost->host_lock);
+		vport->fc_flag &= ~FC_VFI_REGISTERED;
+		spin_unlock_irq(shost->host_lock);
+		phba->fc_topology_changed = 0;
+	}
+
+	rc = memcmp(&vport->fc_portname, &sp->portName,
+		    sizeof(vport->fc_portname));
+
+	if (rc >= 0) {
+		/* This side will initiate the PLOGI */
+		spin_lock_irq(shost->host_lock);
+		vport->fc_flag |= FC_PT2PT_PLOGI;
+		spin_unlock_irq(shost->host_lock);
+
+		/*
+		 * N_Port ID cannot be 0, set our Id to LocalID
+		 * the other side will be RemoteID.
+		 */
+
+		/* not equal */
+		if (rc)
+			vport->fc_myDID = PT2PT_LocalID;
+
+		/* If not registered with a transport, decrement ndlp reference
+		 * count indicating that ndlp can be safely released when other
+		 * references are removed.
+		 */
+		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)))
+			lpfc_nlp_put(ndlp);
+
+		ndlp = lpfc_findnode_did(vport, PT2PT_RemoteID);
+		if (!ndlp) {
+			/*
+			 * Cannot find existing Fabric ndlp, so allocate a
+			 * new one
+			 */
+			ndlp = lpfc_nlp_init(vport, PT2PT_RemoteID);
+			if (!ndlp)
+				goto fail;
+		}
+
+		memcpy(&ndlp->nlp_portname, &sp->portName,
+		       sizeof(struct lpfc_name));
+		memcpy(&ndlp->nlp_nodename, &sp->nodeName,
+		       sizeof(struct lpfc_name));
+		/* Set state will put ndlp onto node list if not already done */
+		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
+		spin_lock_irq(&ndlp->lock);
+		ndlp->nlp_flag |= NLP_NPR_2B_DISC;
+		spin_unlock_irq(&ndlp->lock);
+
+		mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+		if (!mbox)
+			goto fail;
+
+		lpfc_config_link(phba, mbox);
+
+		mbox->mbox_cmpl = lpfc_mbx_cmpl_local_config_link;
+		mbox->vport = vport;
+		rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
+		if (rc == MBX_NOT_FINISHED) {
+			mempool_free(mbox, phba->mbox_mem_pool);
+			goto fail;
+		}
+	} else {
+		/* This side will wait for the PLOGI. If not registered with
+		 * a transport, decrement node reference count indicating that
+		 * ndlp can be released when other references are removed.
+		 */
+		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)))
+			lpfc_nlp_put(ndlp);
+
+		/* Start discovery - this should just do CLEAR_LA */
+		lpfc_disc_start(vport);
+	}
+
+	return 0;
+fail:
+	return -ENXIO;
+}
+
+/**
+ * lpfc_cmpl_els_flogi - Completion callback function for flogi
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the top-level completion callback function for issuing
+ * a Fabric Login (FLOGI) command. If the response IOCB reported error,
+ * the lpfc_els_retry() routine shall be invoked to retry the FLOGI. If
+ * retry has been made (either immediately or delayed with lpfc_els_retry()
+ * returning 1), the command IOCB will be released and function returned.
+ * If the retry attempt has been given up (possibly reach the maximum
+ * number of retries), one additional decrement of ndlp reference shall be
+ * invoked before going out after releasing the command IOCB. This will
+ * actually release the remote node (Note, lpfc_els_free_iocb() will also
+ * invoke one decrement of ndlp reference count). If no error reported in
+ * the IOCB status, the command Port ID field is used to determine whether
+ * this is a point-to-point topology or a fabric topology: if the Port ID
+ * field is assigned, it is a fabric topology; otherwise, it is a
+ * point-to-point topology. The routine lpfc_cmpl_els_flogi_fabric() or
+ * lpfc_cmpl_els_flogi_nport() shall be invoked accordingly to handle the
+ * specific topology completion conditions.
+ **/
+static void
+lpfc_cmpl_els_flogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		    struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = cmdiocb->vport;
+	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
+	IOCB_t *irsp;
+	struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf, *prsp;
+	struct serv_parm *sp;
+	uint16_t fcf_index;
+	int rc;
+	u32 ulp_status, ulp_word4, tmo;
+
+	/* Check to see if link went down during discovery */
+	if (lpfc_els_chk_latt(vport)) {
+		/* One additional decrement on node reference count to
+		 * trigger the release of the node
+		 */
+		if (!(ndlp->fc4_xpt_flags & SCSI_XPT_REGD))
+			lpfc_nlp_put(ndlp);
+		goto out;
+	}
+
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+	ulp_word4 = get_job_word4(phba, rspiocb);
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		tmo = get_wqe_tmo(cmdiocb);
+	} else {
+		irsp = &rspiocb->iocb;
+		tmo = irsp->ulpTimeout;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"FLOGI cmpl:      status:x%x/x%x state:x%x",
+		ulp_status, ulp_word4,
+		vport->port_state);
+
+	if (ulp_status) {
+		/*
+		 * In case of FIP mode, perform roundrobin FCF failover
+		 * due to new FCF discovery
+		 */
+		if ((phba->hba_flag & HBA_FIP_SUPPORT) &&
+		    (phba->fcf.fcf_flag & FCF_DISCOVERY)) {
+			if (phba->link_state < LPFC_LINK_UP)
+				goto stop_rr_fcf_flogi;
+			if ((phba->fcoe_cvl_eventtag_attn ==
+			     phba->fcoe_cvl_eventtag) &&
+			    (ulp_status == IOSTAT_LOCAL_REJECT) &&
+			    ((ulp_word4 & IOERR_PARAM_MASK) ==
+			    IOERR_SLI_ABORTED))
+				goto stop_rr_fcf_flogi;
+			else
+				phba->fcoe_cvl_eventtag_attn =
+					phba->fcoe_cvl_eventtag;
+			lpfc_printf_log(phba, KERN_WARNING, LOG_FIP | LOG_ELS,
+					"2611 FLOGI failed on FCF (x%x), "
+					"status:x%x/x%x, tmo:x%x, perform "
+					"roundrobin FCF failover\n",
+					phba->fcf.current_rec.fcf_indx,
+					ulp_status, ulp_word4, tmo);
+			lpfc_sli4_set_fcf_flogi_fail(phba,
+					phba->fcf.current_rec.fcf_indx);
+			fcf_index = lpfc_sli4_fcf_rr_next_index_get(phba);
+			rc = lpfc_sli4_fcf_rr_next_proc(vport, fcf_index);
+			if (rc)
+				goto out;
+		}
+
+stop_rr_fcf_flogi:
+		/* FLOGI failure */
+		if (!(ulp_status == IOSTAT_LOCAL_REJECT &&
+		      ((ulp_word4 & IOERR_PARAM_MASK) ==
+					IOERR_LOOP_OPEN_FAILURE)))
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+					 "2858 FLOGI failure Status:x%x/x%x TMO"
+					 ":x%x Data x%x x%x\n",
+					 ulp_status, ulp_word4, tmo,
+					 phba->hba_flag, phba->fcf.fcf_flag);
+
+		/* Check for retry */
+		if (lpfc_els_retry(phba, cmdiocb, rspiocb))
+			goto out;
+
+		lpfc_printf_vlog(vport, KERN_WARNING, LOG_TRACE_EVENT,
+				 "0150 FLOGI failure Status:x%x/x%x "
+				 "xri x%x TMO:x%x refcnt %d\n",
+				 ulp_status, ulp_word4, cmdiocb->sli4_xritag,
+				 tmo, kref_read(&ndlp->kref));
+
+		/* If this is not a loop open failure, bail out */
+		if (!(ulp_status == IOSTAT_LOCAL_REJECT &&
+		      ((ulp_word4 & IOERR_PARAM_MASK) ==
+					IOERR_LOOP_OPEN_FAILURE))) {
+			/* FLOGI failure */
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+					 "0100 FLOGI failure Status:x%x/x%x "
+					 "TMO:x%x\n",
+					 ulp_status, ulp_word4, tmo);
+			goto flogifail;
+		}
+
+		/* FLOGI failed, so there is no fabric */
+		spin_lock_irq(shost->host_lock);
+		vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP |
+				    FC_PT2PT_NO_NVME);
+		spin_unlock_irq(shost->host_lock);
+
+		/* If private loop, then allow max outstanding els to be
+		 * LPFC_MAX_DISC_THREADS (32). Scanning in the case of no
+		 * alpa map would take too long otherwise.
+		 */
+		if (phba->alpa_map[0] == 0)
+			vport->cfg_discovery_threads = LPFC_MAX_DISC_THREADS;
+		if ((phba->sli_rev == LPFC_SLI_REV4) &&
+		    (!(vport->fc_flag & FC_VFI_REGISTERED) ||
+		     (vport->fc_prevDID != vport->fc_myDID) ||
+			phba->fc_topology_changed)) {
+			if (vport->fc_flag & FC_VFI_REGISTERED) {
+				if (phba->fc_topology_changed) {
+					lpfc_unregister_fcf_prep(phba);
+					spin_lock_irq(shost->host_lock);
+					vport->fc_flag &= ~FC_VFI_REGISTERED;
+					spin_unlock_irq(shost->host_lock);
+					phba->fc_topology_changed = 0;
+				} else {
+					lpfc_sli4_unreg_all_rpis(vport);
+				}
+			}
+
+			/* Do not register VFI if the driver aborted FLOGI */
+			if (!lpfc_error_lost_link(ulp_status, ulp_word4))
+				lpfc_issue_reg_vfi(vport);
+
+			lpfc_nlp_put(ndlp);
+			goto out;
+		}
+		goto flogifail;
+	}
+	spin_lock_irq(shost->host_lock);
+	vport->fc_flag &= ~FC_VPORT_CVL_RCVD;
+	vport->fc_flag &= ~FC_VPORT_LOGO_RCVD;
+	spin_unlock_irq(shost->host_lock);
+
+	/*
+	 * The FLogI succeeded.  Sync the data for the CPU before
+	 * accessing it.
+	 */
+	prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
+	if (!prsp)
+		goto out;
+	sp = prsp->virt + sizeof(uint32_t);
+
+	/* FLOGI completes successfully */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0101 FLOGI completes successfully, I/O tag:x%x "
+			 "xri x%x Data: x%x x%x x%x x%x x%x x%x x%x %d\n",
+			 cmdiocb->iotag, cmdiocb->sli4_xritag,
+			 ulp_word4, sp->cmn.e_d_tov,
+			 sp->cmn.w2.r_a_tov, sp->cmn.edtovResolution,
+			 vport->port_state, vport->fc_flag,
+			 sp->cmn.priority_tagging, kref_read(&ndlp->kref));
+
+	if (sp->cmn.priority_tagging)
+		vport->phba->pport->vmid_flag |= (LPFC_VMID_ISSUE_QFPA |
+						  LPFC_VMID_TYPE_PRIO);
+
+	if (vport->port_state == LPFC_FLOGI) {
+		/*
+		 * If Common Service Parameters indicate Nport
+		 * we are point to point, if Fport we are Fabric.
+		 */
+		if (sp->cmn.fPort)
+			rc = lpfc_cmpl_els_flogi_fabric(vport, ndlp, sp,
+							ulp_word4);
+		else if (!(phba->hba_flag & HBA_FCOE_MODE))
+			rc = lpfc_cmpl_els_flogi_nport(vport, ndlp, sp);
+		else {
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				"2831 FLOGI response with cleared Fabric "
+				"bit fcf_index 0x%x "
+				"Switch Name %02x%02x%02x%02x%02x%02x%02x%02x "
+				"Fabric Name "
+				"%02x%02x%02x%02x%02x%02x%02x%02x\n",
+				phba->fcf.current_rec.fcf_indx,
+				phba->fcf.current_rec.switch_name[0],
+				phba->fcf.current_rec.switch_name[1],
+				phba->fcf.current_rec.switch_name[2],
+				phba->fcf.current_rec.switch_name[3],
+				phba->fcf.current_rec.switch_name[4],
+				phba->fcf.current_rec.switch_name[5],
+				phba->fcf.current_rec.switch_name[6],
+				phba->fcf.current_rec.switch_name[7],
+				phba->fcf.current_rec.fabric_name[0],
+				phba->fcf.current_rec.fabric_name[1],
+				phba->fcf.current_rec.fabric_name[2],
+				phba->fcf.current_rec.fabric_name[3],
+				phba->fcf.current_rec.fabric_name[4],
+				phba->fcf.current_rec.fabric_name[5],
+				phba->fcf.current_rec.fabric_name[6],
+				phba->fcf.current_rec.fabric_name[7]);
+
+			lpfc_nlp_put(ndlp);
+			spin_lock_irq(&phba->hbalock);
+			phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
+			phba->hba_flag &= ~(FCF_RR_INPROG | HBA_DEVLOSS_TMO);
+			spin_unlock_irq(&phba->hbalock);
+			phba->fcf.fcf_redisc_attempted = 0; /* reset */
+			goto out;
+		}
+		if (!rc) {
+			/* Mark the FCF discovery process done */
+			if (phba->hba_flag & HBA_FIP_SUPPORT)
+				lpfc_printf_vlog(vport, KERN_INFO, LOG_FIP |
+						LOG_ELS,
+						"2769 FLOGI to FCF (x%x) "
+						"completed successfully\n",
+						phba->fcf.current_rec.fcf_indx);
+			spin_lock_irq(&phba->hbalock);
+			phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
+			phba->hba_flag &= ~(FCF_RR_INPROG | HBA_DEVLOSS_TMO);
+			spin_unlock_irq(&phba->hbalock);
+			phba->fcf.fcf_redisc_attempted = 0; /* reset */
+			goto out;
+		}
+	} else if (vport->port_state > LPFC_FLOGI &&
+		   vport->fc_flag & FC_PT2PT) {
+		/*
+		 * In a p2p topology, it is possible that discovery has
+		 * already progressed, and this completion can be ignored.
+		 * Recheck the indicated topology.
+		 */
+		if (!sp->cmn.fPort)
+			goto out;
+	}
+
+flogifail:
+	spin_lock_irq(&phba->hbalock);
+	phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
+	spin_unlock_irq(&phba->hbalock);
+
+	if (!lpfc_error_lost_link(ulp_status, ulp_word4)) {
+		/* FLOGI failed, so just use loop map to make discovery list */
+		lpfc_disc_list_loopmap(vport);
+
+		/* Start discovery */
+		lpfc_disc_start(vport);
+	} else if (((ulp_status != IOSTAT_LOCAL_REJECT) ||
+			(((ulp_word4 & IOERR_PARAM_MASK) !=
+			 IOERR_SLI_ABORTED) &&
+			((ulp_word4 & IOERR_PARAM_MASK) !=
+			 IOERR_SLI_DOWN))) &&
+			(phba->link_state != LPFC_CLEAR_LA)) {
+		/* If FLOGI failed enable link interrupt. */
+		lpfc_issue_clear_la(phba, vport);
+	}
+out:
+	phba->hba_flag &= ~HBA_FLOGI_OUTSTANDING;
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(ndlp);
+}
+
+/**
+ * lpfc_cmpl_els_link_down - Completion callback function for ELS command
+ *                           aborted during a link down
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ */
+static void
+lpfc_cmpl_els_link_down(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+			struct lpfc_iocbq *rspiocb)
+{
+	uint32_t *pcmd;
+	uint32_t cmd;
+	u32 ulp_status, ulp_word4;
+
+	pcmd = (uint32_t *)cmdiocb->cmd_dmabuf->virt;
+	cmd = *pcmd;
+
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+	ulp_word4 = get_job_word4(phba, rspiocb);
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
+			"6445 ELS completes after LINK_DOWN: "
+			" Status %x/%x cmd x%x flg x%x\n",
+			ulp_status, ulp_word4, cmd,
+			cmdiocb->cmd_flag);
+
+	if (cmdiocb->cmd_flag & LPFC_IO_FABRIC) {
+		cmdiocb->cmd_flag &= ~LPFC_IO_FABRIC;
+		atomic_dec(&phba->fabric_iocb_count);
+	}
+	lpfc_els_free_iocb(phba, cmdiocb);
+}
+
+/**
+ * lpfc_issue_els_flogi - Issue an flogi iocb command for a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @ndlp: pointer to a node-list data structure.
+ * @retry: number of retries to the command IOCB.
+ *
+ * This routine issues a Fabric Login (FLOGI) Request ELS command
+ * for a @vport. The initiator service parameters are put into the payload
+ * of the FLOGI Request IOCB and the top-level callback function pointer
+ * to lpfc_cmpl_els_flogi() routine is put to the IOCB completion callback
+ * function field. The lpfc_issue_fabric_iocb routine is invoked to send
+ * out FLOGI ELS command with one outstanding fabric IOCB at a time.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the FLOGI ELS command.
+ *
+ * Return code
+ *   0 - successfully issued flogi iocb for @vport
+ *   1 - failed to issue flogi iocb for @vport
+ **/
+static int
+lpfc_issue_els_flogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
+		     uint8_t retry)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	struct serv_parm *sp;
+	union lpfc_wqe128 *wqe = NULL;
+	IOCB_t *icmd = NULL;
+	struct lpfc_iocbq *elsiocb;
+	struct lpfc_iocbq defer_flogi_acc;
+	u8 *pcmd, ct;
+	uint16_t cmdsize;
+	uint32_t tmo, did;
+	int rc;
+
+	cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
+	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_FLOGI);
+
+	if (!elsiocb)
+		return 1;
+
+	wqe = &elsiocb->wqe;
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+	icmd = &elsiocb->iocb;
+
+	/* For FLOGI request, remainder of payload is service parameters */
+	*((uint32_t *) (pcmd)) = ELS_CMD_FLOGI;
+	pcmd += sizeof(uint32_t);
+	memcpy(pcmd, &vport->fc_sparam, sizeof(struct serv_parm));
+	sp = (struct serv_parm *) pcmd;
+
+	/* Setup CSPs accordingly for Fabric */
+	sp->cmn.e_d_tov = 0;
+	sp->cmn.w2.r_a_tov = 0;
+	sp->cmn.virtual_fabric_support = 0;
+	sp->cls1.classValid = 0;
+	if (sp->cmn.fcphLow < FC_PH3)
+		sp->cmn.fcphLow = FC_PH3;
+	if (sp->cmn.fcphHigh < FC_PH3)
+		sp->cmn.fcphHigh = FC_PH3;
+
+	/* Determine if switch supports priority tagging */
+	if (phba->cfg_vmid_priority_tagging) {
+		sp->cmn.priority_tagging = 1;
+		/* lpfc_vmid_host_uuid is combination of wwpn and wwnn */
+		if (uuid_is_null((uuid_t *)vport->lpfc_vmid_host_uuid)) {
+			memcpy(vport->lpfc_vmid_host_uuid, phba->wwpn,
+			       sizeof(phba->wwpn));
+			memcpy(&vport->lpfc_vmid_host_uuid[8], phba->wwnn,
+			       sizeof(phba->wwnn));
+		}
+	}
+
+	if  (phba->sli_rev == LPFC_SLI_REV4) {
+		if (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) ==
+		    LPFC_SLI_INTF_IF_TYPE_0) {
+			/* FLOGI needs to be 3 for WQE FCFI */
+			ct = SLI4_CT_FCFI;
+			bf_set(wqe_ct, &wqe->els_req.wqe_com, ct);
+
+			/* Set the fcfi to the fcfi we registered with */
+			bf_set(wqe_ctxt_tag, &wqe->els_req.wqe_com,
+			       phba->fcf.fcfi);
+		}
+
+		/* Can't do SLI4 class2 without support sequence coalescing */
+		sp->cls2.classValid = 0;
+		sp->cls2.seqDelivery = 0;
+	} else {
+		/* Historical, setting sequential-delivery bit for SLI3 */
+		sp->cls2.seqDelivery = (sp->cls2.classValid) ? 1 : 0;
+		sp->cls3.seqDelivery = (sp->cls3.classValid) ? 1 : 0;
+		if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
+			sp->cmn.request_multiple_Nport = 1;
+			/* For FLOGI, Let FLOGI rsp set the NPortID for VPI 0 */
+			icmd->ulpCt_h = 1;
+			icmd->ulpCt_l = 0;
+		} else {
+			sp->cmn.request_multiple_Nport = 0;
+		}
+
+		if (phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
+			icmd->un.elsreq64.myID = 0;
+			icmd->un.elsreq64.fl = 1;
+		}
+	}
+
+	tmo = phba->fc_ratov;
+	phba->fc_ratov = LPFC_DISC_FLOGI_TMO;
+	lpfc_set_disctmo(vport);
+	phba->fc_ratov = tmo;
+
+	phba->fc_stat.elsXmitFLOGI++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_flogi;
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"Issue FLOGI:     opt:x%x",
+		phba->sli3_options, 0, 0);
+
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	rc = lpfc_issue_fabric_iocb(phba, elsiocb);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+
+	phba->hba_flag |= (HBA_FLOGI_ISSUED | HBA_FLOGI_OUTSTANDING);
+
+	/* Clear external loopback plug detected flag */
+	phba->link_flag &= ~LS_EXTERNAL_LOOPBACK;
+
+	/* Check for a deferred FLOGI ACC condition */
+	if (phba->defer_flogi_acc_flag) {
+		/* lookup ndlp for received FLOGI */
+		ndlp = lpfc_findnode_did(vport, 0);
+		if (!ndlp)
+			return 0;
+
+		did = vport->fc_myDID;
+		vport->fc_myDID = Fabric_DID;
+
+		memset(&defer_flogi_acc, 0, sizeof(struct lpfc_iocbq));
+
+		if (phba->sli_rev == LPFC_SLI_REV4) {
+			bf_set(wqe_ctxt_tag,
+			       &defer_flogi_acc.wqe.xmit_els_rsp.wqe_com,
+			       phba->defer_flogi_acc_rx_id);
+			bf_set(wqe_rcvoxid,
+			       &defer_flogi_acc.wqe.xmit_els_rsp.wqe_com,
+			       phba->defer_flogi_acc_ox_id);
+		} else {
+			icmd = &defer_flogi_acc.iocb;
+			icmd->ulpContext = phba->defer_flogi_acc_rx_id;
+			icmd->unsli3.rcvsli3.ox_id =
+				phba->defer_flogi_acc_ox_id;
+		}
+
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+				 "3354 Xmit deferred FLOGI ACC: rx_id: x%x,"
+				 " ox_id: x%x, hba_flag x%x\n",
+				 phba->defer_flogi_acc_rx_id,
+				 phba->defer_flogi_acc_ox_id, phba->hba_flag);
+
+		/* Send deferred FLOGI ACC */
+		lpfc_els_rsp_acc(vport, ELS_CMD_FLOGI, &defer_flogi_acc,
+				 ndlp, NULL);
+
+		phba->defer_flogi_acc_flag = false;
+		vport->fc_myDID = did;
+
+		/* Decrement ndlp reference count to indicate the node can be
+		 * released when other references are removed.
+		 */
+		lpfc_nlp_put(ndlp);
+	}
+
+	return 0;
+}
+
+/**
+ * lpfc_els_abort_flogi - Abort all outstanding flogi iocbs
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine aborts all the outstanding Fabric Login (FLOGI) IOCBs
+ * with a @phba. This routine walks all the outstanding IOCBs on the txcmplq
+ * list and issues an abort IOCB commond on each outstanding IOCB that
+ * contains a active Fabric_DID ndlp. Note that this function is to issue
+ * the abort IOCB command on all the outstanding IOCBs, thus when this
+ * function returns, it does not guarantee all the IOCBs are actually aborted.
+ *
+ * Return code
+ *   0 - Successfully issued abort iocb on all outstanding flogis (Always 0)
+ **/
+int
+lpfc_els_abort_flogi(struct lpfc_hba *phba)
+{
+	struct lpfc_sli_ring *pring;
+	struct lpfc_iocbq *iocb, *next_iocb;
+	struct lpfc_nodelist *ndlp;
+	u32 ulp_command;
+
+	/* Abort outstanding I/O on NPort <nlp_DID> */
+	lpfc_printf_log(phba, KERN_INFO, LOG_DISCOVERY,
+			"0201 Abort outstanding I/O on NPort x%x\n",
+			Fabric_DID);
+
+	pring = lpfc_phba_elsring(phba);
+	if (unlikely(!pring))
+		return -EIO;
+
+	/*
+	 * Check the txcmplq for an iocb that matches the nport the driver is
+	 * searching for.
+	 */
+	spin_lock_irq(&phba->hbalock);
+	list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
+		ulp_command = get_job_cmnd(phba, iocb);
+		if (ulp_command == CMD_ELS_REQUEST64_CR) {
+			ndlp = iocb->ndlp;
+			if (ndlp && ndlp->nlp_DID == Fabric_DID) {
+				if ((phba->pport->fc_flag & FC_PT2PT) &&
+				    !(phba->pport->fc_flag & FC_PT2PT_PLOGI))
+					iocb->fabric_cmd_cmpl =
+						lpfc_ignore_els_cmpl;
+				lpfc_sli_issue_abort_iotag(phba, pring, iocb,
+							   NULL);
+			}
+		}
+	}
+	/* Make sure HBA is alive */
+	lpfc_issue_hb_tmo(phba);
+
+	spin_unlock_irq(&phba->hbalock);
+
+	return 0;
+}
+
+/**
+ * lpfc_initial_flogi - Issue an initial fabric login for a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine issues an initial Fabric Login (FLOGI) for the @vport
+ * specified. It first searches the ndlp with the Fabric_DID (0xfffffe) from
+ * the @vport's ndlp list. If no such ndlp found, it will create an ndlp and
+ * put it into the @vport's ndlp list. If an inactive ndlp found on the list,
+ * it will just be enabled and made active. The lpfc_issue_els_flogi() routine
+ * is then invoked with the @vport and the ndlp to perform the FLOGI for the
+ * @vport.
+ *
+ * Return code
+ *   0 - failed to issue initial flogi for @vport
+ *   1 - successfully issued initial flogi for @vport
+ **/
+int
+lpfc_initial_flogi(struct lpfc_vport *vport)
+{
+	struct lpfc_nodelist *ndlp;
+
+	vport->port_state = LPFC_FLOGI;
+	lpfc_set_disctmo(vport);
+
+	/* First look for the Fabric ndlp */
+	ndlp = lpfc_findnode_did(vport, Fabric_DID);
+	if (!ndlp) {
+		/* Cannot find existing Fabric ndlp, so allocate a new one */
+		ndlp = lpfc_nlp_init(vport, Fabric_DID);
+		if (!ndlp)
+			return 0;
+		/* Set the node type */
+		ndlp->nlp_type |= NLP_FABRIC;
+
+		/* Put ndlp onto node list */
+		lpfc_enqueue_node(vport, ndlp);
+	}
+
+	/* Reset the Fabric flag, topology change may have happened */
+	vport->fc_flag &= ~FC_FABRIC;
+	if (lpfc_issue_els_flogi(vport, ndlp, 0)) {
+		/* A node reference should be retained while registered with a
+		 * transport or dev-loss-evt work is pending.
+		 * Otherwise, decrement node reference to trigger release.
+		 */
+		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)) &&
+		    !(ndlp->nlp_flag & NLP_IN_DEV_LOSS))
+			lpfc_nlp_put(ndlp);
+		return 0;
+	}
+	return 1;
+}
+
+/**
+ * lpfc_initial_fdisc - Issue an initial fabric discovery for a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine issues an initial Fabric Discover (FDISC) for the @vport
+ * specified. It first searches the ndlp with the Fabric_DID (0xfffffe) from
+ * the @vport's ndlp list. If no such ndlp found, it will create an ndlp and
+ * put it into the @vport's ndlp list. If an inactive ndlp found on the list,
+ * it will just be enabled and made active. The lpfc_issue_els_fdisc() routine
+ * is then invoked with the @vport and the ndlp to perform the FDISC for the
+ * @vport.
+ *
+ * Return code
+ *   0 - failed to issue initial fdisc for @vport
+ *   1 - successfully issued initial fdisc for @vport
+ **/
+int
+lpfc_initial_fdisc(struct lpfc_vport *vport)
+{
+	struct lpfc_nodelist *ndlp;
+
+	/* First look for the Fabric ndlp */
+	ndlp = lpfc_findnode_did(vport, Fabric_DID);
+	if (!ndlp) {
+		/* Cannot find existing Fabric ndlp, so allocate a new one */
+		ndlp = lpfc_nlp_init(vport, Fabric_DID);
+		if (!ndlp)
+			return 0;
+
+		/* NPIV is only supported in Fabrics. */
+		ndlp->nlp_type |= NLP_FABRIC;
+
+		/* Put ndlp onto node list */
+		lpfc_enqueue_node(vport, ndlp);
+	}
+
+	if (lpfc_issue_els_fdisc(vport, ndlp, 0)) {
+		/* A node reference should be retained while registered with a
+		 * transport or dev-loss-evt work is pending.
+		 * Otherwise, decrement node reference to trigger release.
+		 */
+		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)) &&
+		    !(ndlp->nlp_flag & NLP_IN_DEV_LOSS))
+			lpfc_nlp_put(ndlp);
+		return 0;
+	}
+	return 1;
+}
+
+/**
+ * lpfc_more_plogi - Check and issue remaining plogis for a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine checks whether there are more remaining Port Logins
+ * (PLOGI) to be issued for the @vport. If so, it will invoke the routine
+ * lpfc_els_disc_plogi() to go through the Node Port Recovery (NPR) nodes
+ * to issue ELS PLOGIs up to the configured discover threads with the
+ * @vport (@vport->cfg_discovery_threads). The function also decrement
+ * the @vport's num_disc_node by 1 if it is not already 0.
+ **/
+void
+lpfc_more_plogi(struct lpfc_vport *vport)
+{
+	if (vport->num_disc_nodes)
+		vport->num_disc_nodes--;
+
+	/* Continue discovery with <num_disc_nodes> PLOGIs to go */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+			 "0232 Continue discovery with %d PLOGIs to go "
+			 "Data: x%x x%x x%x\n",
+			 vport->num_disc_nodes, vport->fc_plogi_cnt,
+			 vport->fc_flag, vport->port_state);
+	/* Check to see if there are more PLOGIs to be sent */
+	if (vport->fc_flag & FC_NLP_MORE)
+		/* go thru NPR nodes and issue any remaining ELS PLOGIs */
+		lpfc_els_disc_plogi(vport);
+
+	return;
+}
+
+/**
+ * lpfc_plogi_confirm_nport - Confirm plogi wwpn matches stored ndlp
+ * @phba: pointer to lpfc hba data structure.
+ * @prsp: pointer to response IOCB payload.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine checks and indicates whether the WWPN of an N_Port, retrieved
+ * from a PLOGI, matches the WWPN that is stored in the @ndlp for that N_POrt.
+ * The following cases are considered N_Port confirmed:
+ * 1) The N_Port is a Fabric ndlp; 2) The @ndlp is on vport list and matches
+ * the WWPN of the N_Port logged into; 3) The @ndlp is not on vport list but
+ * it does not have WWPN assigned either. If the WWPN is confirmed, the
+ * pointer to the @ndlp will be returned. If the WWPN is not confirmed:
+ * 1) if there is a node on vport list other than the @ndlp with the same
+ * WWPN of the N_Port PLOGI logged into, the lpfc_unreg_rpi() will be invoked
+ * on that node to release the RPI associated with the node; 2) if there is
+ * no node found on vport list with the same WWPN of the N_Port PLOGI logged
+ * into, a new node shall be allocated (or activated). In either case, the
+ * parameters of the @ndlp shall be copied to the new_ndlp, the @ndlp shall
+ * be released and the new_ndlp shall be put on to the vport node list and
+ * its pointer returned as the confirmed node.
+ *
+ * Note that before the @ndlp got "released", the keepDID from not-matching
+ * or inactive "new_ndlp" on the vport node list is assigned to the nlp_DID
+ * of the @ndlp. This is because the release of @ndlp is actually to put it
+ * into an inactive state on the vport node list and the vport node list
+ * management algorithm does not allow two node with a same DID.
+ *
+ * Return code
+ *   pointer to the PLOGI N_Port @ndlp
+ **/
+static struct lpfc_nodelist *
+lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
+			 struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_vport *vport = ndlp->vport;
+	struct lpfc_nodelist *new_ndlp;
+	struct serv_parm *sp;
+	uint8_t  name[sizeof(struct lpfc_name)];
+	uint32_t keepDID = 0, keep_nlp_flag = 0;
+	uint32_t keep_new_nlp_flag = 0;
+	uint16_t keep_nlp_state;
+	u32 keep_nlp_fc4_type = 0;
+	struct lpfc_nvme_rport *keep_nrport = NULL;
+	unsigned long *active_rrqs_xri_bitmap = NULL;
+
+	/* Fabric nodes can have the same WWPN so we don't bother searching
+	 * by WWPN.  Just return the ndlp that was given to us.
+	 */
+	if (ndlp->nlp_type & NLP_FABRIC)
+		return ndlp;
+
+	sp = (struct serv_parm *) ((uint8_t *) prsp + sizeof(uint32_t));
+	memset(name, 0, sizeof(struct lpfc_name));
+
+	/* Now we find out if the NPort we are logging into, matches the WWPN
+	 * we have for that ndlp. If not, we have some work to do.
+	 */
+	new_ndlp = lpfc_findnode_wwpn(vport, &sp->portName);
+
+	/* return immediately if the WWPN matches ndlp */
+	if (!new_ndlp || (new_ndlp == ndlp))
+		return ndlp;
+
+	/*
+	 * Unregister from backend if not done yet. Could have been skipped
+	 * due to ADISC
+	 */
+	lpfc_nlp_unreg_node(vport, new_ndlp);
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		active_rrqs_xri_bitmap = mempool_alloc(phba->active_rrq_pool,
+						       GFP_KERNEL);
+		if (active_rrqs_xri_bitmap)
+			memset(active_rrqs_xri_bitmap, 0,
+			       phba->cfg_rrq_xri_bitmap_sz);
+	}
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_NODE,
+			 "3178 PLOGI confirm: ndlp x%x x%x x%x: "
+			 "new_ndlp x%x x%x x%x\n",
+			 ndlp->nlp_DID, ndlp->nlp_flag,  ndlp->nlp_fc4_type,
+			 (new_ndlp ? new_ndlp->nlp_DID : 0),
+			 (new_ndlp ? new_ndlp->nlp_flag : 0),
+			 (new_ndlp ? new_ndlp->nlp_fc4_type : 0));
+
+	keepDID = new_ndlp->nlp_DID;
+
+	if (phba->sli_rev == LPFC_SLI_REV4 && active_rrqs_xri_bitmap)
+		memcpy(active_rrqs_xri_bitmap, new_ndlp->active_rrqs_xri_bitmap,
+		       phba->cfg_rrq_xri_bitmap_sz);
+
+	/* At this point in this routine, we know new_ndlp will be
+	 * returned. however, any previous GID_FTs that were done
+	 * would have updated nlp_fc4_type in ndlp, so we must ensure
+	 * new_ndlp has the right value.
+	 */
+	if (vport->fc_flag & FC_FABRIC) {
+		keep_nlp_fc4_type = new_ndlp->nlp_fc4_type;
+		new_ndlp->nlp_fc4_type = ndlp->nlp_fc4_type;
+	}
+
+	lpfc_unreg_rpi(vport, new_ndlp);
+	new_ndlp->nlp_DID = ndlp->nlp_DID;
+	new_ndlp->nlp_prev_state = ndlp->nlp_prev_state;
+	if (phba->sli_rev == LPFC_SLI_REV4)
+		memcpy(new_ndlp->active_rrqs_xri_bitmap,
+		       ndlp->active_rrqs_xri_bitmap,
+		       phba->cfg_rrq_xri_bitmap_sz);
+
+	/* Lock both ndlps */
+	spin_lock_irq(&ndlp->lock);
+	spin_lock_irq(&new_ndlp->lock);
+	keep_new_nlp_flag = new_ndlp->nlp_flag;
+	keep_nlp_flag = ndlp->nlp_flag;
+	new_ndlp->nlp_flag = ndlp->nlp_flag;
+
+	/* if new_ndlp had NLP_UNREG_INP set, keep it */
+	if (keep_new_nlp_flag & NLP_UNREG_INP)
+		new_ndlp->nlp_flag |= NLP_UNREG_INP;
+	else
+		new_ndlp->nlp_flag &= ~NLP_UNREG_INP;
+
+	/* if new_ndlp had NLP_RPI_REGISTERED set, keep it */
+	if (keep_new_nlp_flag & NLP_RPI_REGISTERED)
+		new_ndlp->nlp_flag |= NLP_RPI_REGISTERED;
+	else
+		new_ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;
+
+	/*
+	 * Retain the DROPPED flag. This will take care of the init
+	 * refcount when affecting the state change
+	 */
+	if (keep_new_nlp_flag & NLP_DROPPED)
+		new_ndlp->nlp_flag |= NLP_DROPPED;
+	else
+		new_ndlp->nlp_flag &= ~NLP_DROPPED;
+
+	ndlp->nlp_flag = keep_new_nlp_flag;
+
+	/* if ndlp had NLP_UNREG_INP set, keep it */
+	if (keep_nlp_flag & NLP_UNREG_INP)
+		ndlp->nlp_flag |= NLP_UNREG_INP;
+	else
+		ndlp->nlp_flag &= ~NLP_UNREG_INP;
+
+	/* if ndlp had NLP_RPI_REGISTERED set, keep it */
+	if (keep_nlp_flag & NLP_RPI_REGISTERED)
+		ndlp->nlp_flag |= NLP_RPI_REGISTERED;
+	else
+		ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;
+
+	/*
+	 * Retain the DROPPED flag. This will take care of the init
+	 * refcount when affecting the state change
+	 */
+	if (keep_nlp_flag & NLP_DROPPED)
+		ndlp->nlp_flag |= NLP_DROPPED;
+	else
+		ndlp->nlp_flag &= ~NLP_DROPPED;
+
+	spin_unlock_irq(&new_ndlp->lock);
+	spin_unlock_irq(&ndlp->lock);
+
+	/* Set nlp_states accordingly */
+	keep_nlp_state = new_ndlp->nlp_state;
+	lpfc_nlp_set_state(vport, new_ndlp, ndlp->nlp_state);
+
+	/* interchange the nvme remoteport structs */
+	keep_nrport = new_ndlp->nrport;
+	new_ndlp->nrport = ndlp->nrport;
+
+	/* Move this back to NPR state */
+	if (memcmp(&ndlp->nlp_portname, name, sizeof(struct lpfc_name)) == 0) {
+		/* The ndlp doesn't have a portname yet, but does have an
+		 * NPort ID.  The new_ndlp portname matches the Rport's
+		 * portname.  Reinstantiate the new_ndlp and reset the ndlp.
+		 */
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "3179 PLOGI confirm NEW: %x %x\n",
+			 new_ndlp->nlp_DID, keepDID);
+
+		/* Two ndlps cannot have the same did on the nodelist.
+		 * The KeepDID and keep_nlp_fc4_type need to be swapped
+		 * because ndlp is inflight with no WWPN.
+		 */
+		ndlp->nlp_DID = keepDID;
+		ndlp->nlp_fc4_type = keep_nlp_fc4_type;
+		lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);
+		if (phba->sli_rev == LPFC_SLI_REV4 &&
+		    active_rrqs_xri_bitmap)
+			memcpy(ndlp->active_rrqs_xri_bitmap,
+			       active_rrqs_xri_bitmap,
+			       phba->cfg_rrq_xri_bitmap_sz);
+
+	} else {
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "3180 PLOGI confirm SWAP: %x %x\n",
+			 new_ndlp->nlp_DID, keepDID);
+
+		lpfc_unreg_rpi(vport, ndlp);
+
+		/* The ndlp and new_ndlp both have WWPNs but are swapping
+		 * NPort Ids and attributes.
+		 */
+		ndlp->nlp_DID = keepDID;
+		ndlp->nlp_fc4_type = keep_nlp_fc4_type;
+
+		if (phba->sli_rev == LPFC_SLI_REV4 &&
+		    active_rrqs_xri_bitmap)
+			memcpy(ndlp->active_rrqs_xri_bitmap,
+			       active_rrqs_xri_bitmap,
+			       phba->cfg_rrq_xri_bitmap_sz);
+
+		/* Since we are switching over to the new_ndlp,
+		 * reset the old ndlp state
+		 */
+		if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
+		    (ndlp->nlp_state == NLP_STE_MAPPED_NODE))
+			keep_nlp_state = NLP_STE_NPR_NODE;
+		lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);
+		ndlp->nrport = keep_nrport;
+	}
+
+	/*
+	 * If ndlp is not associated with any rport we can drop it here else
+	 * let dev_loss_tmo_callbk trigger DEVICE_RM event
+	 */
+	if (!ndlp->rport && (ndlp->nlp_state == NLP_STE_NPR_NODE))
+		lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
+
+	if (phba->sli_rev == LPFC_SLI_REV4 &&
+	    active_rrqs_xri_bitmap)
+		mempool_free(active_rrqs_xri_bitmap,
+			     phba->active_rrq_pool);
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_NODE,
+			 "3173 PLOGI confirm exit: new_ndlp x%x x%x x%x\n",
+			 new_ndlp->nlp_DID, new_ndlp->nlp_flag,
+			 new_ndlp->nlp_fc4_type);
+
+	return new_ndlp;
+}
+
+/**
+ * lpfc_end_rscn - Check and handle more rscn for a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine checks whether more Registration State Change
+ * Notifications (RSCNs) came in while the discovery state machine was in
+ * the FC_RSCN_MODE. If so, the lpfc_els_handle_rscn() routine will be
+ * invoked to handle the additional RSCNs for the @vport. Otherwise, the
+ * FC_RSCN_MODE bit will be cleared with the @vport to mark as the end of
+ * handling the RSCNs.
+ **/
+void
+lpfc_end_rscn(struct lpfc_vport *vport)
+{
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+
+	if (vport->fc_flag & FC_RSCN_MODE) {
+		/*
+		 * Check to see if more RSCNs came in while we were
+		 * processing this one.
+		 */
+		if (vport->fc_rscn_id_cnt ||
+		    (vport->fc_flag & FC_RSCN_DISCOVERY) != 0)
+			lpfc_els_handle_rscn(vport);
+		else {
+			spin_lock_irq(shost->host_lock);
+			vport->fc_flag &= ~FC_RSCN_MODE;
+			spin_unlock_irq(shost->host_lock);
+		}
+	}
+}
+
+/**
+ * lpfc_cmpl_els_rrq - Completion handled for els RRQs.
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine will call the clear rrq function to free the rrq and
+ * clear the xri's bit in the ndlp's xri_bitmap. If the ndlp does not
+ * exist then the clear_rrq is still called because the rrq needs to
+ * be freed.
+ **/
+
+static void
+lpfc_cmpl_els_rrq(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		  struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = cmdiocb->vport;
+	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
+	struct lpfc_node_rrq *rrq;
+	u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
+	u32 ulp_word4 = get_job_word4(phba, rspiocb);
+
+	/* we pass cmdiocb to state machine which needs rspiocb as well */
+	rrq = cmdiocb->context_un.rrq;
+	cmdiocb->rsp_iocb = rspiocb;
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"RRQ cmpl:      status:x%x/x%x did:x%x",
+		ulp_status, ulp_word4,
+		get_job_els_rsp64_did(phba, cmdiocb));
+
+
+	/* rrq completes to NPort <nlp_DID> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "2880 RRQ completes to DID x%x "
+			 "Data: x%x x%x x%x x%x x%x\n",
+			 ndlp->nlp_DID, ulp_status, ulp_word4,
+			 get_wqe_tmo(cmdiocb), rrq->xritag, rrq->rxid);
+
+	if (ulp_status) {
+		/* Check for retry */
+		/* RRQ failed Don't print the vport to vport rjts */
+		if (ulp_status != IOSTAT_LS_RJT ||
+		    (((ulp_word4) >> 16 != LSRJT_INVALID_CMD) &&
+		     ((ulp_word4) >> 16 != LSRJT_UNABLE_TPC)) ||
+		    (phba)->pport->cfg_log_verbose & LOG_ELS)
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+					 "2881 RRQ failure DID:%06X Status:"
+					 "x%x/x%x\n",
+					 ndlp->nlp_DID, ulp_status,
+					 ulp_word4);
+	}
+
+	lpfc_clr_rrq_active(phba, rrq->xritag, rrq);
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(ndlp);
+	return;
+}
+/**
+ * lpfc_cmpl_els_plogi - Completion callback function for plogi
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the completion callback function for issuing the Port
+ * Login (PLOGI) command. For PLOGI completion, there must be an active
+ * ndlp on the vport node list that matches the remote node ID from the
+ * PLOGI response IOCB. If such ndlp does not exist, the PLOGI is simply
+ * ignored and command IOCB released. The PLOGI response IOCB status is
+ * checked for error conditions. If there is error status reported, PLOGI
+ * retry shall be attempted by invoking the lpfc_els_retry() routine.
+ * Otherwise, the lpfc_plogi_confirm_nport() routine shall be invoked on
+ * the ndlp and the NLP_EVT_CMPL_PLOGI state to the Discover State Machine
+ * (DSM) is set for this PLOGI completion. Finally, it checks whether
+ * there are additional N_Port nodes with the vport that need to perform
+ * PLOGI. If so, the lpfc_more_plogi() routine is invoked to issue addition
+ * PLOGIs.
+ **/
+static void
+lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		    struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = cmdiocb->vport;
+	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
+	IOCB_t *irsp;
+	struct lpfc_nodelist *ndlp, *free_ndlp;
+	struct lpfc_dmabuf *prsp;
+	int disc;
+	struct serv_parm *sp = NULL;
+	u32 ulp_status, ulp_word4, did, iotag;
+	bool release_node = false;
+
+	/* we pass cmdiocb to state machine which needs rspiocb as well */
+	cmdiocb->rsp_iocb = rspiocb;
+
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+	ulp_word4 = get_job_word4(phba, rspiocb);
+	did = get_job_els_rsp64_did(phba, cmdiocb);
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		iotag = get_wqe_reqtag(cmdiocb);
+	} else {
+		irsp = &rspiocb->iocb;
+		iotag = irsp->ulpIoTag;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"PLOGI cmpl:      status:x%x/x%x did:x%x",
+		ulp_status, ulp_word4, did);
+
+	ndlp = lpfc_findnode_did(vport, did);
+	if (!ndlp) {
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				 "0136 PLOGI completes to NPort x%x "
+				 "with no ndlp. Data: x%x x%x x%x\n",
+				 did, ulp_status, ulp_word4, iotag);
+		goto out_freeiocb;
+	}
+
+	/* Since ndlp can be freed in the disc state machine, note if this node
+	 * is being used during discovery.
+	 */
+	spin_lock_irq(&ndlp->lock);
+	disc = (ndlp->nlp_flag & NLP_NPR_2B_DISC);
+	ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
+	spin_unlock_irq(&ndlp->lock);
+
+	/* PLOGI completes to NPort <nlp_DID> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0102 PLOGI completes to NPort x%06x "
+			 "Data: x%x x%x x%x x%x x%x\n",
+			 ndlp->nlp_DID, ndlp->nlp_fc4_type,
+			 ulp_status, ulp_word4,
+			 disc, vport->num_disc_nodes);
+
+	/* Check to see if link went down during discovery */
+	if (lpfc_els_chk_latt(vport)) {
+		spin_lock_irq(&ndlp->lock);
+		ndlp->nlp_flag |= NLP_NPR_2B_DISC;
+		spin_unlock_irq(&ndlp->lock);
+		goto out;
+	}
+
+	if (ulp_status) {
+		/* Check for retry */
+		if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
+			/* ELS command is being retried */
+			if (disc) {
+				spin_lock_irq(&ndlp->lock);
+				ndlp->nlp_flag |= NLP_NPR_2B_DISC;
+				spin_unlock_irq(&ndlp->lock);
+			}
+			goto out;
+		}
+		/* PLOGI failed Don't print the vport to vport rjts */
+		if (ulp_status != IOSTAT_LS_RJT ||
+		    (((ulp_word4) >> 16 != LSRJT_INVALID_CMD) &&
+		     ((ulp_word4) >> 16 != LSRJT_UNABLE_TPC)) ||
+		    (phba)->pport->cfg_log_verbose & LOG_ELS)
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+					 "2753 PLOGI failure DID:%06X "
+					 "Status:x%x/x%x\n",
+					 ndlp->nlp_DID, ulp_status,
+					 ulp_word4);
+
+		/* Do not call DSM for lpfc_els_abort'ed ELS cmds */
+		if (!lpfc_error_lost_link(ulp_status, ulp_word4))
+			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
+						NLP_EVT_CMPL_PLOGI);
+
+		/* If a PLOGI collision occurred, the node needs to continue
+		 * with the reglogin process.
+		 */
+		spin_lock_irq(&ndlp->lock);
+		if ((ndlp->nlp_flag & (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI)) &&
+		    ndlp->nlp_state == NLP_STE_REG_LOGIN_ISSUE) {
+			spin_unlock_irq(&ndlp->lock);
+			goto out;
+		}
+
+		/* No PLOGI collision and the node is not registered with the
+		 * scsi or nvme transport. It is no longer an active node. Just
+		 * start the device remove process.
+		 */
+		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
+			ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
+			if (!(ndlp->nlp_flag & NLP_IN_DEV_LOSS))
+				release_node = true;
+		}
+		spin_unlock_irq(&ndlp->lock);
+
+		if (release_node)
+			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
+						NLP_EVT_DEVICE_RM);
+	} else {
+		/* Good status, call state machine */
+		prsp = list_entry(cmdiocb->cmd_dmabuf->list.next,
+				  struct lpfc_dmabuf, list);
+		ndlp = lpfc_plogi_confirm_nport(phba, prsp->virt, ndlp);
+
+		sp = (struct serv_parm *)((u8 *)prsp->virt +
+					  sizeof(u32));
+
+		ndlp->vmid_support = 0;
+		if ((phba->cfg_vmid_app_header && sp->cmn.app_hdr_support) ||
+		    (phba->cfg_vmid_priority_tagging &&
+		     sp->cmn.priority_tagging)) {
+			lpfc_printf_log(phba, KERN_DEBUG, LOG_ELS,
+					"4018 app_hdr_support %d tagging %d DID x%x\n",
+					sp->cmn.app_hdr_support,
+					sp->cmn.priority_tagging,
+					ndlp->nlp_DID);
+			/* if the dest port supports VMID, mark it in ndlp */
+			ndlp->vmid_support = 1;
+		}
+
+		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
+					NLP_EVT_CMPL_PLOGI);
+	}
+
+	if (disc && vport->num_disc_nodes) {
+		/* Check to see if there are more PLOGIs to be sent */
+		lpfc_more_plogi(vport);
+
+		if (vport->num_disc_nodes == 0) {
+			spin_lock_irq(shost->host_lock);
+			vport->fc_flag &= ~FC_NDISC_ACTIVE;
+			spin_unlock_irq(shost->host_lock);
+
+			lpfc_can_disctmo(vport);
+			lpfc_end_rscn(vport);
+		}
+	}
+
+out:
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
+			      "PLOGI Cmpl PUT:     did:x%x refcnt %d",
+			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
+
+out_freeiocb:
+	/* Release the reference on the original I/O request. */
+	free_ndlp = cmdiocb->ndlp;
+
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(free_ndlp);
+	return;
+}
+
+/**
+ * lpfc_issue_els_plogi - Issue an plogi iocb command for a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @did: destination port identifier.
+ * @retry: number of retries to the command IOCB.
+ *
+ * This routine issues a Port Login (PLOGI) command to a remote N_Port
+ * (with the @did) for a @vport. Before issuing a PLOGI to a remote N_Port,
+ * the ndlp with the remote N_Port DID must exist on the @vport's ndlp list.
+ * This routine constructs the proper fields of the PLOGI IOCB and invokes
+ * the lpfc_sli_issue_iocb() routine to send out PLOGI ELS command.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding
+ * the ndlp and the reference to ndlp will be stored into the ndlp field
+ * of the IOCB for the completion callback function to the PLOGI ELS command.
+ *
+ * Return code
+ *   0 - Successfully issued a plogi for @vport
+ *   1 - failed to issue a plogi for @vport
+ **/
+int
+lpfc_issue_els_plogi(struct lpfc_vport *vport, uint32_t did, uint8_t retry)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	struct serv_parm *sp;
+	struct lpfc_nodelist *ndlp;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	uint16_t cmdsize;
+	int ret;
+
+	ndlp = lpfc_findnode_did(vport, did);
+	if (!ndlp)
+		return 1;
+
+	/* Defer the processing of the issue PLOGI until after the
+	 * outstanding UNREG_RPI mbox command completes, unless we
+	 * are going offline. This logic does not apply for Fabric DIDs
+	 */
+	if ((ndlp->nlp_flag & NLP_UNREG_INP) &&
+	    ((ndlp->nlp_DID & Fabric_DID_MASK) != Fabric_DID_MASK) &&
+	    !(vport->fc_flag & FC_OFFLINE_MODE)) {
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+				 "4110 Issue PLOGI x%x deferred "
+				 "on NPort x%x rpi x%x Data: x%px\n",
+				 ndlp->nlp_defer_did, ndlp->nlp_DID,
+				 ndlp->nlp_rpi, ndlp);
+
+		/* We can only defer 1st PLOGI */
+		if (ndlp->nlp_defer_did == NLP_EVT_NOTHING_PENDING)
+			ndlp->nlp_defer_did = did;
+		return 0;
+	}
+
+	cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
+	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
+				     ELS_CMD_PLOGI);
+	if (!elsiocb)
+		return 1;
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+
+	/* For PLOGI request, remainder of payload is service parameters */
+	*((uint32_t *) (pcmd)) = ELS_CMD_PLOGI;
+	pcmd += sizeof(uint32_t);
+	memcpy(pcmd, &vport->fc_sparam, sizeof(struct serv_parm));
+	sp = (struct serv_parm *) pcmd;
+
+	/*
+	 * If we are a N-port connected to a Fabric, fix-up paramm's so logins
+	 * to device on remote loops work.
+	 */
+	if ((vport->fc_flag & FC_FABRIC) && !(vport->fc_flag & FC_PUBLIC_LOOP))
+		sp->cmn.altBbCredit = 1;
+
+	if (sp->cmn.fcphLow < FC_PH_4_3)
+		sp->cmn.fcphLow = FC_PH_4_3;
+
+	if (sp->cmn.fcphHigh < FC_PH3)
+		sp->cmn.fcphHigh = FC_PH3;
+
+	sp->cmn.valid_vendor_ver_level = 0;
+	memset(sp->un.vendorVersion, 0, sizeof(sp->un.vendorVersion));
+	sp->cmn.bbRcvSizeMsb &= 0xF;
+
+	/* Check if the destination port supports VMID */
+	ndlp->vmid_support = 0;
+	if (vport->vmid_priority_tagging)
+		sp->cmn.priority_tagging = 1;
+	else if (phba->cfg_vmid_app_header &&
+		 bf_get(lpfc_ftr_ashdr, &phba->sli4_hba.sli4_flags))
+		sp->cmn.app_hdr_support = 1;
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"Issue PLOGI:     did:x%x",
+		did, 0, 0);
+
+	/* If our firmware supports this feature, convey that
+	 * information to the target using the vendor specific field.
+	 */
+	if (phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) {
+		sp->cmn.valid_vendor_ver_level = 1;
+		sp->un.vv.vid = cpu_to_be32(LPFC_VV_EMLX_ID);
+		sp->un.vv.flags = cpu_to_be32(LPFC_VV_SUPPRESS_RSP);
+	}
+
+	phba->fc_stat.elsXmitPLOGI++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_plogi;
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+			      "Issue PLOGI:     did:x%x refcnt %d",
+			      did, kref_read(&ndlp->kref), 0);
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (ret) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+
+	return 0;
+}
+
+/**
+ * lpfc_cmpl_els_prli - Completion callback function for prli
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the completion callback function for a Process Login
+ * (PRLI) ELS command. The PRLI response IOCB status is checked for error
+ * status. If there is error status reported, PRLI retry shall be attempted
+ * by invoking the lpfc_els_retry() routine. Otherwise, the state
+ * NLP_EVT_CMPL_PRLI is sent to the Discover State Machine (DSM) for this
+ * ndlp to mark the PRLI completion.
+ **/
+static void
+lpfc_cmpl_els_prli(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		   struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = cmdiocb->vport;
+	struct lpfc_nodelist *ndlp;
+	char *mode;
+	u32 loglevel;
+	u32 ulp_status;
+	u32 ulp_word4;
+	bool release_node = false;
+
+	/* we pass cmdiocb to state machine which needs rspiocb as well */
+	cmdiocb->rsp_iocb = rspiocb;
+
+	ndlp = cmdiocb->ndlp;
+
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+	ulp_word4 = get_job_word4(phba, rspiocb);
+
+	spin_lock_irq(&ndlp->lock);
+	ndlp->nlp_flag &= ~NLP_PRLI_SND;
+
+	/* Driver supports multiple FC4 types.  Counters matter. */
+	vport->fc_prli_sent--;
+	ndlp->fc4_prli_sent--;
+	spin_unlock_irq(&ndlp->lock);
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"PRLI cmpl:       status:x%x/x%x did:x%x",
+		ulp_status, ulp_word4,
+		ndlp->nlp_DID);
+
+	/* PRLI completes to NPort <nlp_DID> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0103 PRLI completes to NPort x%06x "
+			 "Data: x%x x%x x%x x%x\n",
+			 ndlp->nlp_DID, ulp_status, ulp_word4,
+			 vport->num_disc_nodes, ndlp->fc4_prli_sent);
+
+	/* Check to see if link went down during discovery */
+	if (lpfc_els_chk_latt(vport))
+		goto out;
+
+	if (ulp_status) {
+		/* Check for retry */
+		if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
+			/* ELS command is being retried */
+			goto out;
+		}
+
+		/* If we don't send GFT_ID to Fabric, a PRLI error
+		 * could be expected.
+		 */
+		if ((vport->fc_flag & FC_FABRIC) ||
+		    (vport->cfg_enable_fc4_type != LPFC_ENABLE_BOTH)) {
+			mode = KERN_ERR;
+			loglevel =  LOG_TRACE_EVENT;
+		} else {
+			mode = KERN_INFO;
+			loglevel =  LOG_ELS;
+		}
+
+		/* PRLI failed */
+		lpfc_printf_vlog(vport, mode, loglevel,
+				 "2754 PRLI failure DID:%06X Status:x%x/x%x, "
+				 "data: x%x\n",
+				 ndlp->nlp_DID, ulp_status,
+				 ulp_word4, ndlp->fc4_prli_sent);
+
+		/* Do not call DSM for lpfc_els_abort'ed ELS cmds */
+		if (!lpfc_error_lost_link(ulp_status, ulp_word4))
+			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
+						NLP_EVT_CMPL_PRLI);
+
+		/*
+		 * For P2P topology, retain the node so that PLOGI can be
+		 * attempted on it again.
+		 */
+		if (vport->fc_flag & FC_PT2PT)
+			goto out;
+
+		/* As long as this node is not registered with the SCSI
+		 * or NVMe transport and no other PRLIs are outstanding,
+		 * it is no longer an active node.  Otherwise devloss
+		 * handles the final cleanup.
+		 */
+		spin_lock_irq(&ndlp->lock);
+		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)) &&
+		    !ndlp->fc4_prli_sent) {
+			ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
+			if (!(ndlp->nlp_flag & NLP_IN_DEV_LOSS))
+				release_node = true;
+		}
+		spin_unlock_irq(&ndlp->lock);
+
+		if (release_node)
+			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
+						NLP_EVT_DEVICE_RM);
+	} else {
+		/* Good status, call state machine.  However, if another
+		 * PRLI is outstanding, don't call the state machine
+		 * because final disposition to Mapped or Unmapped is
+		 * completed there.
+		 */
+		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
+					NLP_EVT_CMPL_PRLI);
+	}
+
+out:
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(ndlp);
+	return;
+}
+
+/**
+ * lpfc_issue_els_prli - Issue a prli iocb command for a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @ndlp: pointer to a node-list data structure.
+ * @retry: number of retries to the command IOCB.
+ *
+ * This routine issues a Process Login (PRLI) ELS command for the
+ * @vport. The PRLI service parameters are set up in the payload of the
+ * PRLI Request command and the pointer to lpfc_cmpl_els_prli() routine
+ * is put to the IOCB completion callback func field before invoking the
+ * routine lpfc_sli_issue_iocb() to send out PRLI command.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the PRLI ELS command.
+ *
+ * Return code
+ *   0 - successfully issued prli iocb command for @vport
+ *   1 - failed to issue prli iocb command for @vport
+ **/
+int
+lpfc_issue_els_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
+		    uint8_t retry)
+{
+	int rc = 0;
+	struct lpfc_hba *phba = vport->phba;
+	PRLI *npr;
+	struct lpfc_nvme_prli *npr_nvme;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	uint16_t cmdsize;
+	u32 local_nlp_type, elscmd;
+
+	/*
+	 * If we are in RSCN mode, the FC4 types supported from a
+	 * previous GFT_ID command may not be accurate. So, if we
+	 * are a NVME Initiator, always look for the possibility of
+	 * the remote NPort beng a NVME Target.
+	 */
+	if (phba->sli_rev == LPFC_SLI_REV4 &&
+	    vport->fc_flag & FC_RSCN_MODE &&
+	    vport->nvmei_support)
+		ndlp->nlp_fc4_type |= NLP_FC4_NVME;
+	local_nlp_type = ndlp->nlp_fc4_type;
+
+	/* This routine will issue 1 or 2 PRLIs, so zero all the ndlp
+	 * fields here before any of them can complete.
+	 */
+	ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
+	ndlp->nlp_type &= ~(NLP_NVME_TARGET | NLP_NVME_INITIATOR);
+	ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
+	ndlp->nlp_flag &= ~(NLP_FIRSTBURST | NLP_NPR_2B_DISC);
+	ndlp->nvme_fb_size = 0;
+
+ send_next_prli:
+	if (local_nlp_type & NLP_FC4_FCP) {
+		/* Payload is 4 + 16 = 20 x14 bytes. */
+		cmdsize = (sizeof(uint32_t) + sizeof(PRLI));
+		elscmd = ELS_CMD_PRLI;
+	} else if (local_nlp_type & NLP_FC4_NVME) {
+		/* Payload is 4 + 20 = 24 x18 bytes. */
+		cmdsize = (sizeof(uint32_t) + sizeof(struct lpfc_nvme_prli));
+		elscmd = ELS_CMD_NVMEPRLI;
+	} else {
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+				 "3083 Unknown FC_TYPE x%x ndlp x%06x\n",
+				 ndlp->nlp_fc4_type, ndlp->nlp_DID);
+		return 1;
+	}
+
+	/* SLI3 ports don't support NVME.  If this rport is a strict NVME
+	 * FC4 type, implicitly LOGO.
+	 */
+	if (phba->sli_rev == LPFC_SLI_REV3 &&
+	    ndlp->nlp_fc4_type == NLP_FC4_NVME) {
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+				 "3088 Rport fc4 type 0x%x not supported by SLI3 adapter\n",
+				 ndlp->nlp_type);
+		lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
+		return 1;
+	}
+
+	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
+				     ndlp->nlp_DID, elscmd);
+	if (!elsiocb)
+		return 1;
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+
+	/* For PRLI request, remainder of payload is service parameters */
+	memset(pcmd, 0, cmdsize);
+
+	if (local_nlp_type & NLP_FC4_FCP) {
+		/* Remainder of payload is FCP PRLI parameter page.
+		 * Note: this data structure is defined as
+		 * BE/LE in the structure definition so no
+		 * byte swap call is made.
+		 */
+		*((uint32_t *)(pcmd)) = ELS_CMD_PRLI;
+		pcmd += sizeof(uint32_t);
+		npr = (PRLI *)pcmd;
+
+		/*
+		 * If our firmware version is 3.20 or later,
+		 * set the following bits for FC-TAPE support.
+		 */
+		if (phba->vpd.rev.feaLevelHigh >= 0x02) {
+			npr->ConfmComplAllowed = 1;
+			npr->Retry = 1;
+			npr->TaskRetryIdReq = 1;
+		}
+		npr->estabImagePair = 1;
+		npr->readXferRdyDis = 1;
+		if (vport->cfg_first_burst_size)
+			npr->writeXferRdyDis = 1;
+
+		/* For FCP support */
+		npr->prliType = PRLI_FCP_TYPE;
+		npr->initiatorFunc = 1;
+		elsiocb->cmd_flag |= LPFC_PRLI_FCP_REQ;
+
+		/* Remove FCP type - processed. */
+		local_nlp_type &= ~NLP_FC4_FCP;
+	} else if (local_nlp_type & NLP_FC4_NVME) {
+		/* Remainder of payload is NVME PRLI parameter page.
+		 * This data structure is the newer definition that
+		 * uses bf macros so a byte swap is required.
+		 */
+		*((uint32_t *)(pcmd)) = ELS_CMD_NVMEPRLI;
+		pcmd += sizeof(uint32_t);
+		npr_nvme = (struct lpfc_nvme_prli *)pcmd;
+		bf_set(prli_type_code, npr_nvme, PRLI_NVME_TYPE);
+		bf_set(prli_estabImagePair, npr_nvme, 0);  /* Should be 0 */
+		if (phba->nsler) {
+			bf_set(prli_nsler, npr_nvme, 1);
+			bf_set(prli_conf, npr_nvme, 1);
+		}
+
+		/* Only initiators request first burst. */
+		if ((phba->cfg_nvme_enable_fb) &&
+		    !phba->nvmet_support)
+			bf_set(prli_fba, npr_nvme, 1);
+
+		if (phba->nvmet_support) {
+			bf_set(prli_tgt, npr_nvme, 1);
+			bf_set(prli_disc, npr_nvme, 1);
+		} else {
+			bf_set(prli_init, npr_nvme, 1);
+			bf_set(prli_conf, npr_nvme, 1);
+		}
+
+		npr_nvme->word1 = cpu_to_be32(npr_nvme->word1);
+		npr_nvme->word4 = cpu_to_be32(npr_nvme->word4);
+		elsiocb->cmd_flag |= LPFC_PRLI_NVME_REQ;
+
+		/* Remove NVME type - processed. */
+		local_nlp_type &= ~NLP_FC4_NVME;
+	}
+
+	phba->fc_stat.elsXmitPRLI++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_prli;
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+			      "Issue PRLI:  did:x%x refcnt %d",
+			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+
+	/* The vport counters are used for lpfc_scan_finished, but
+	 * the ndlp is used to track outstanding PRLIs for different
+	 * FC4 types.
+	 */
+	spin_lock_irq(&ndlp->lock);
+	ndlp->nlp_flag |= NLP_PRLI_SND;
+	vport->fc_prli_sent++;
+	ndlp->fc4_prli_sent++;
+	spin_unlock_irq(&ndlp->lock);
+
+	/* The driver supports 2 FC4 types.  Make sure
+	 * a PRLI is issued for all types before exiting.
+	 */
+	if (phba->sli_rev == LPFC_SLI_REV4 &&
+	    local_nlp_type & (NLP_FC4_FCP | NLP_FC4_NVME))
+		goto send_next_prli;
+	else
+		return 0;
+}
+
+/**
+ * lpfc_rscn_disc - Perform rscn discovery for a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine performs Registration State Change Notification (RSCN)
+ * discovery for a @vport. If the @vport's node port recovery count is not
+ * zero, it will invoke the lpfc_els_disc_plogi() to perform PLOGI for all
+ * the nodes that need recovery. If none of the PLOGI were needed through
+ * the lpfc_els_disc_plogi() routine, the lpfc_end_rscn() routine shall be
+ * invoked to check and handle possible more RSCN came in during the period
+ * of processing the current ones.
+ **/
+static void
+lpfc_rscn_disc(struct lpfc_vport *vport)
+{
+	lpfc_can_disctmo(vport);
+
+	/* RSCN discovery */
+	/* go thru NPR nodes and issue ELS PLOGIs */
+	if (vport->fc_npr_cnt)
+		if (lpfc_els_disc_plogi(vport))
+			return;
+
+	lpfc_end_rscn(vport);
+}
+
+/**
+ * lpfc_adisc_done - Complete the adisc phase of discovery
+ * @vport: pointer to lpfc_vport hba data structure that finished all ADISCs.
+ *
+ * This function is called when the final ADISC is completed during discovery.
+ * This function handles clearing link attention or issuing reg_vpi depending
+ * on whether npiv is enabled. This function also kicks off the PLOGI phase of
+ * discovery.
+ * This function is called with no locks held.
+ **/
+static void
+lpfc_adisc_done(struct lpfc_vport *vport)
+{
+	struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_hba   *phba = vport->phba;
+
+	/*
+	 * For NPIV, cmpl_reg_vpi will set port_state to READY,
+	 * and continue discovery.
+	 */
+	if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
+	    !(vport->fc_flag & FC_RSCN_MODE) &&
+	    (phba->sli_rev < LPFC_SLI_REV4)) {
+
+		/*
+		 * If link is down, clear_la and reg_vpi will be done after
+		 * flogi following a link up event
+		 */
+		if (!lpfc_is_link_up(phba))
+			return;
+
+		/* The ADISCs are complete.  Doesn't matter if they
+		 * succeeded or failed because the ADISC completion
+		 * routine guarantees to call the state machine and
+		 * the RPI is either unregistered (failed ADISC response)
+		 * or the RPI is still valid and the node is marked
+		 * mapped for a target.  The exchanges should be in the
+		 * correct state. This code is specific to SLI3.
+		 */
+		lpfc_issue_clear_la(phba, vport);
+		lpfc_issue_reg_vpi(phba, vport);
+		return;
+	}
+	/*
+	* For SLI2, we need to set port_state to READY
+	* and continue discovery.
+	*/
+	if (vport->port_state < LPFC_VPORT_READY) {
+		/* If we get here, there is nothing to ADISC */
+		lpfc_issue_clear_la(phba, vport);
+		if (!(vport->fc_flag & FC_ABORT_DISCOVERY)) {
+			vport->num_disc_nodes = 0;
+			/* go thru NPR list, issue ELS PLOGIs */
+			if (vport->fc_npr_cnt)
+				lpfc_els_disc_plogi(vport);
+			if (!vport->num_disc_nodes) {
+				spin_lock_irq(shost->host_lock);
+				vport->fc_flag &= ~FC_NDISC_ACTIVE;
+				spin_unlock_irq(shost->host_lock);
+				lpfc_can_disctmo(vport);
+				lpfc_end_rscn(vport);
+			}
+		}
+		vport->port_state = LPFC_VPORT_READY;
+	} else
+		lpfc_rscn_disc(vport);
+}
+
+/**
+ * lpfc_more_adisc - Issue more adisc as needed
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine determines whether there are more ndlps on a @vport
+ * node list need to have Address Discover (ADISC) issued. If so, it will
+ * invoke the lpfc_els_disc_adisc() routine to issue ADISC on the @vport's
+ * remaining nodes which need to have ADISC sent.
+ **/
+void
+lpfc_more_adisc(struct lpfc_vport *vport)
+{
+	if (vport->num_disc_nodes)
+		vport->num_disc_nodes--;
+	/* Continue discovery with <num_disc_nodes> ADISCs to go */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+			 "0210 Continue discovery with %d ADISCs to go "
+			 "Data: x%x x%x x%x\n",
+			 vport->num_disc_nodes, vport->fc_adisc_cnt,
+			 vport->fc_flag, vport->port_state);
+	/* Check to see if there are more ADISCs to be sent */
+	if (vport->fc_flag & FC_NLP_MORE) {
+		lpfc_set_disctmo(vport);
+		/* go thru NPR nodes and issue any remaining ELS ADISCs */
+		lpfc_els_disc_adisc(vport);
+	}
+	if (!vport->num_disc_nodes)
+		lpfc_adisc_done(vport);
+	return;
+}
+
+/**
+ * lpfc_cmpl_els_adisc - Completion callback function for adisc
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the completion function for issuing the Address Discover
+ * (ADISC) command. It first checks to see whether link went down during
+ * the discovery process. If so, the node will be marked as node port
+ * recovery for issuing discover IOCB by the link attention handler and
+ * exit. Otherwise, the response status is checked. If error was reported
+ * in the response status, the ADISC command shall be retried by invoking
+ * the lpfc_els_retry() routine. Otherwise, if no error was reported in
+ * the response status, the state machine is invoked to set transition
+ * with respect to NLP_EVT_CMPL_ADISC event.
+ **/
+static void
+lpfc_cmpl_els_adisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		    struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = cmdiocb->vport;
+	IOCB_t *irsp;
+	struct lpfc_nodelist *ndlp;
+	int  disc;
+	u32 ulp_status, ulp_word4, tmo;
+	bool release_node = false;
+
+	/* we pass cmdiocb to state machine which needs rspiocb as well */
+	cmdiocb->rsp_iocb = rspiocb;
+
+	ndlp = cmdiocb->ndlp;
+
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+	ulp_word4 = get_job_word4(phba, rspiocb);
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		tmo = get_wqe_tmo(cmdiocb);
+	} else {
+		irsp = &rspiocb->iocb;
+		tmo = irsp->ulpTimeout;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"ADISC cmpl:      status:x%x/x%x did:x%x",
+		ulp_status, ulp_word4,
+		ndlp->nlp_DID);
+
+	/* Since ndlp can be freed in the disc state machine, note if this node
+	 * is being used during discovery.
+	 */
+	spin_lock_irq(&ndlp->lock);
+	disc = (ndlp->nlp_flag & NLP_NPR_2B_DISC);
+	ndlp->nlp_flag &= ~(NLP_ADISC_SND | NLP_NPR_2B_DISC);
+	spin_unlock_irq(&ndlp->lock);
+	/* ADISC completes to NPort <nlp_DID> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0104 ADISC completes to NPort x%x "
+			 "Data: x%x x%x x%x x%x x%x\n",
+			 ndlp->nlp_DID, ulp_status, ulp_word4,
+			 tmo, disc, vport->num_disc_nodes);
+	/* Check to see if link went down during discovery */
+	if (lpfc_els_chk_latt(vport)) {
+		spin_lock_irq(&ndlp->lock);
+		ndlp->nlp_flag |= NLP_NPR_2B_DISC;
+		spin_unlock_irq(&ndlp->lock);
+		goto out;
+	}
+
+	if (ulp_status) {
+		/* Check for retry */
+		if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
+			/* ELS command is being retried */
+			if (disc) {
+				spin_lock_irq(&ndlp->lock);
+				ndlp->nlp_flag |= NLP_NPR_2B_DISC;
+				spin_unlock_irq(&ndlp->lock);
+				lpfc_set_disctmo(vport);
+			}
+			goto out;
+		}
+		/* ADISC failed */
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				 "2755 ADISC failure DID:%06X Status:x%x/x%x\n",
+				 ndlp->nlp_DID, ulp_status,
+				 ulp_word4);
+		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
+					NLP_EVT_CMPL_ADISC);
+
+		/* As long as this node is not registered with the SCSI or NVMe
+		 * transport, it is no longer an active node. Otherwise
+		 * devloss handles the final cleanup.
+		 */
+		spin_lock_irq(&ndlp->lock);
+		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
+			ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
+			if (!(ndlp->nlp_flag & NLP_IN_DEV_LOSS))
+				release_node = true;
+		}
+		spin_unlock_irq(&ndlp->lock);
+
+		if (release_node)
+			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
+						NLP_EVT_DEVICE_RM);
+	} else
+		/* Good status, call state machine */
+		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
+					NLP_EVT_CMPL_ADISC);
+
+	/* Check to see if there are more ADISCs to be sent */
+	if (disc && vport->num_disc_nodes)
+		lpfc_more_adisc(vport);
+out:
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(ndlp);
+	return;
+}
+
+/**
+ * lpfc_issue_els_adisc - Issue an address discover iocb to an node on a vport
+ * @vport: pointer to a virtual N_Port data structure.
+ * @ndlp: pointer to a node-list data structure.
+ * @retry: number of retries to the command IOCB.
+ *
+ * This routine issues an Address Discover (ADISC) for an @ndlp on a
+ * @vport. It prepares the payload of the ADISC ELS command, updates the
+ * and states of the ndlp, and invokes the lpfc_sli_issue_iocb() routine
+ * to issue the ADISC ELS command.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the ADISC ELS command.
+ *
+ * Return code
+ *   0 - successfully issued adisc
+ *   1 - failed to issue adisc
+ **/
+int
+lpfc_issue_els_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
+		     uint8_t retry)
+{
+	int rc = 0;
+	struct lpfc_hba  *phba = vport->phba;
+	ADISC *ap;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	uint16_t cmdsize;
+
+	cmdsize = (sizeof(uint32_t) + sizeof(ADISC));
+	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_ADISC);
+	if (!elsiocb)
+		return 1;
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+
+	/* For ADISC request, remainder of payload is service parameters */
+	*((uint32_t *) (pcmd)) = ELS_CMD_ADISC;
+	pcmd += sizeof(uint32_t);
+
+	/* Fill in ADISC payload */
+	ap = (ADISC *) pcmd;
+	ap->hardAL_PA = phba->fc_pref_ALPA;
+	memcpy(&ap->portName, &vport->fc_portname, sizeof(struct lpfc_name));
+	memcpy(&ap->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
+	ap->DID = be32_to_cpu(vport->fc_myDID);
+
+	phba->fc_stat.elsXmitADISC++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_adisc;
+	spin_lock_irq(&ndlp->lock);
+	ndlp->nlp_flag |= NLP_ADISC_SND;
+	spin_unlock_irq(&ndlp->lock);
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		goto err;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+			      "Issue ADISC:   did:x%x refcnt %d",
+			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		goto err;
+	}
+
+	return 0;
+
+err:
+	spin_lock_irq(&ndlp->lock);
+	ndlp->nlp_flag &= ~NLP_ADISC_SND;
+	spin_unlock_irq(&ndlp->lock);
+	return 1;
+}
+
+/**
+ * lpfc_cmpl_els_logo - Completion callback function for logo
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the completion function for issuing the ELS Logout (LOGO)
+ * command. If no error status was reported from the LOGO response, the
+ * state machine of the associated ndlp shall be invoked for transition with
+ * respect to NLP_EVT_CMPL_LOGO event.
+ **/
+static void
+lpfc_cmpl_els_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		   struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
+	struct lpfc_vport *vport = ndlp->vport;
+	IOCB_t *irsp;
+	unsigned long flags;
+	uint32_t skip_recovery = 0;
+	int wake_up_waiter = 0;
+	u32 ulp_status;
+	u32 ulp_word4;
+	u32 tmo;
+
+	/* we pass cmdiocb to state machine which needs rspiocb as well */
+	cmdiocb->rsp_iocb = rspiocb;
+
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+	ulp_word4 = get_job_word4(phba, rspiocb);
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		tmo = get_wqe_tmo(cmdiocb);
+	} else {
+		irsp = &rspiocb->iocb;
+		tmo = irsp->ulpTimeout;
+	}
+
+	spin_lock_irq(&ndlp->lock);
+	ndlp->nlp_flag &= ~NLP_LOGO_SND;
+	if (ndlp->save_flags & NLP_WAIT_FOR_LOGO) {
+		wake_up_waiter = 1;
+		ndlp->save_flags &= ~NLP_WAIT_FOR_LOGO;
+	}
+	spin_unlock_irq(&ndlp->lock);
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"LOGO cmpl:       status:x%x/x%x did:x%x",
+		ulp_status, ulp_word4,
+		ndlp->nlp_DID);
+
+	/* LOGO completes to NPort <nlp_DID> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0105 LOGO completes to NPort x%x "
+			 "refcnt %d nflags x%x Data: x%x x%x x%x x%x\n",
+			 ndlp->nlp_DID, kref_read(&ndlp->kref), ndlp->nlp_flag,
+			 ulp_status, ulp_word4,
+			 tmo, vport->num_disc_nodes);
+
+	if (lpfc_els_chk_latt(vport)) {
+		skip_recovery = 1;
+		goto out;
+	}
+
+	/* The LOGO will not be retried on failure.  A LOGO was
+	 * issued to the remote rport and a ACC or RJT or no Answer are
+	 * all acceptable.  Note the failure and move forward with
+	 * discovery.  The PLOGI will retry.
+	 */
+	if (ulp_status) {
+		/* LOGO failed */
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				 "2756 LOGO failure, No Retry DID:%06X "
+				 "Status:x%x/x%x\n",
+				 ndlp->nlp_DID, ulp_status,
+				 ulp_word4);
+
+		if (lpfc_error_lost_link(ulp_status, ulp_word4)) {
+			skip_recovery = 1;
+			goto out;
+		}
+	}
+
+	/* Call state machine. This will unregister the rpi if needed. */
+	lpfc_disc_state_machine(vport, ndlp, cmdiocb, NLP_EVT_CMPL_LOGO);
+
+	/* The driver sets this flag for an NPIV instance that doesn't want to
+	 * log into the remote port.
+	 */
+	if (ndlp->nlp_flag & NLP_TARGET_REMOVE) {
+		spin_lock_irq(&ndlp->lock);
+		if (phba->sli_rev == LPFC_SLI_REV4)
+			ndlp->nlp_flag |= NLP_RELEASE_RPI;
+		ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
+		spin_unlock_irq(&ndlp->lock);
+		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
+					NLP_EVT_DEVICE_RM);
+		goto out_rsrc_free;
+	}
+
+out:
+	/* At this point, the LOGO processing is complete. NOTE: For a
+	 * pt2pt topology, we are assuming the NPortID will only change
+	 * on link up processing. For a LOGO / PLOGI initiated by the
+	 * Initiator, we are assuming the NPortID is not going to change.
+	 */
+
+	if (wake_up_waiter && ndlp->logo_waitq)
+		wake_up(ndlp->logo_waitq);
+	/*
+	 * If the node is a target, the handling attempts to recover the port.
+	 * For any other port type, the rpi is unregistered as an implicit
+	 * LOGO.
+	 */
+	if (ndlp->nlp_type & (NLP_FCP_TARGET | NLP_NVME_TARGET) &&
+	    skip_recovery == 0) {
+		lpfc_cancel_retry_delay_tmo(vport, ndlp);
+		spin_lock_irqsave(&ndlp->lock, flags);
+		ndlp->nlp_flag |= NLP_NPR_2B_DISC;
+		spin_unlock_irqrestore(&ndlp->lock, flags);
+
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+				 "3187 LOGO completes to NPort x%x: Start "
+				 "Recovery Data: x%x x%x x%x x%x\n",
+				 ndlp->nlp_DID, ulp_status,
+				 ulp_word4, tmo,
+				 vport->num_disc_nodes);
+
+		lpfc_els_free_iocb(phba, cmdiocb);
+		lpfc_nlp_put(ndlp);
+
+		lpfc_disc_start(vport);
+		return;
+	}
+
+	/* Cleanup path for failed REG_RPI handling. If REG_RPI fails, the
+	 * driver sends a LOGO to the rport to cleanup.  For fabric and
+	 * initiator ports cleanup the node as long as it the node is not
+	 * register with the transport.
+	 */
+	if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
+		spin_lock_irq(&ndlp->lock);
+		ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
+		spin_unlock_irq(&ndlp->lock);
+		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
+					NLP_EVT_DEVICE_RM);
+	}
+out_rsrc_free:
+	/* Driver is done with the I/O. */
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(ndlp);
+}
+
+/**
+ * lpfc_issue_els_logo - Issue a logo to an node on a vport
+ * @vport: pointer to a virtual N_Port data structure.
+ * @ndlp: pointer to a node-list data structure.
+ * @retry: number of retries to the command IOCB.
+ *
+ * This routine constructs and issues an ELS Logout (LOGO) iocb command
+ * to a remote node, referred by an @ndlp on a @vport. It constructs the
+ * payload of the IOCB, properly sets up the @ndlp state, and invokes the
+ * lpfc_sli_issue_iocb() routine to send out the LOGO ELS command.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the LOGO ELS command.
+ *
+ * Callers of this routine are expected to unregister the RPI first
+ *
+ * Return code
+ *   0 - successfully issued logo
+ *   1 - failed to issue logo
+ **/
+int
+lpfc_issue_els_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
+		    uint8_t retry)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	uint16_t cmdsize;
+	int rc;
+
+	spin_lock_irq(&ndlp->lock);
+	if (ndlp->nlp_flag & NLP_LOGO_SND) {
+		spin_unlock_irq(&ndlp->lock);
+		return 0;
+	}
+	spin_unlock_irq(&ndlp->lock);
+
+	cmdsize = (2 * sizeof(uint32_t)) + sizeof(struct lpfc_name);
+	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_LOGO);
+	if (!elsiocb)
+		return 1;
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+	*((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
+	pcmd += sizeof(uint32_t);
+
+	/* Fill in LOGO payload */
+	*((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
+	pcmd += sizeof(uint32_t);
+	memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));
+
+	phba->fc_stat.elsXmitLOGO++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_logo;
+	spin_lock_irq(&ndlp->lock);
+	ndlp->nlp_flag |= NLP_LOGO_SND;
+	ndlp->nlp_flag &= ~NLP_ISSUE_LOGO;
+	spin_unlock_irq(&ndlp->lock);
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		goto err;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+			      "Issue LOGO:      did:x%x refcnt %d",
+			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		goto err;
+	}
+
+	spin_lock_irq(&ndlp->lock);
+	ndlp->nlp_prev_state = ndlp->nlp_state;
+	spin_unlock_irq(&ndlp->lock);
+	lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
+	return 0;
+
+err:
+	spin_lock_irq(&ndlp->lock);
+	ndlp->nlp_flag &= ~NLP_LOGO_SND;
+	spin_unlock_irq(&ndlp->lock);
+	return 1;
+}
+
+/**
+ * lpfc_cmpl_els_cmd - Completion callback function for generic els command
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is a generic completion callback function for ELS commands.
+ * Specifically, it is the callback function which does not need to perform
+ * any command specific operations. It is currently used by the ELS command
+ * issuing routines for RSCN, lpfc_issue_els_rscn, and the ELS Fibre Channel
+ * Address Resolution Protocol Response (FARPR) routine, lpfc_issue_els_farpr().
+ * Other than certain debug loggings, this callback function simply invokes the
+ * lpfc_els_chk_latt() routine to check whether link went down during the
+ * discovery process.
+ **/
+static void
+lpfc_cmpl_els_cmd(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		  struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = cmdiocb->vport;
+	struct lpfc_nodelist *free_ndlp;
+	IOCB_t *irsp;
+	u32 ulp_status, ulp_word4, tmo, did, iotag;
+
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+	ulp_word4 = get_job_word4(phba, rspiocb);
+	did = get_job_els_rsp64_did(phba, cmdiocb);
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		tmo = get_wqe_tmo(cmdiocb);
+		iotag = get_wqe_reqtag(cmdiocb);
+	} else {
+		irsp = &rspiocb->iocb;
+		tmo = irsp->ulpTimeout;
+		iotag = irsp->ulpIoTag;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+			      "ELS cmd cmpl:    status:x%x/x%x did:x%x",
+			      ulp_status, ulp_word4, did);
+
+	/* ELS cmd tag <ulpIoTag> completes */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0106 ELS cmd tag x%x completes Data: x%x x%x x%x\n",
+			 iotag, ulp_status, ulp_word4, tmo);
+
+	/* Check to see if link went down during discovery */
+	lpfc_els_chk_latt(vport);
+
+	free_ndlp = cmdiocb->ndlp;
+
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(free_ndlp);
+}
+
+/**
+ * lpfc_reg_fab_ctrl_node - RPI register the fabric controller node.
+ * @vport: pointer to lpfc_vport data structure.
+ * @fc_ndlp: pointer to the fabric controller (0xfffffd) node.
+ *
+ * This routine registers the rpi assigned to the fabric controller
+ * NPort_ID (0xfffffd) with the port and moves the node to UNMAPPED
+ * state triggering a registration with the SCSI transport.
+ *
+ * This routine is single out because the fabric controller node
+ * does not receive a PLOGI.  This routine is consumed by the
+ * SCR and RDF ELS commands.  Callers are expected to qualify
+ * with SLI4 first.
+ **/
+static int
+lpfc_reg_fab_ctrl_node(struct lpfc_vport *vport, struct lpfc_nodelist *fc_ndlp)
+{
+	int rc = 0;
+	struct lpfc_hba *phba = vport->phba;
+	struct lpfc_nodelist *ns_ndlp;
+	LPFC_MBOXQ_t *mbox;
+
+	if (fc_ndlp->nlp_flag & NLP_RPI_REGISTERED)
+		return rc;
+
+	ns_ndlp = lpfc_findnode_did(vport, NameServer_DID);
+	if (!ns_ndlp)
+		return -ENODEV;
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
+			 "0935 %s: Reg FC RPI x%x on FC DID x%x NSSte: x%x\n",
+			 __func__, fc_ndlp->nlp_rpi, fc_ndlp->nlp_DID,
+			 ns_ndlp->nlp_state);
+	if (ns_ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
+		return -ENODEV;
+
+	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+	if (!mbox) {
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
+				 "0936 %s: no memory for reg_login "
+				 "Data: x%x x%x x%x x%x\n", __func__,
+				 fc_ndlp->nlp_DID, fc_ndlp->nlp_state,
+				 fc_ndlp->nlp_flag, fc_ndlp->nlp_rpi);
+		return -ENOMEM;
+	}
+	rc = lpfc_reg_rpi(phba, vport->vpi, fc_ndlp->nlp_DID,
+			  (u8 *)&vport->fc_sparam, mbox, fc_ndlp->nlp_rpi);
+	if (rc) {
+		rc = -EACCES;
+		goto out;
+	}
+
+	fc_ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
+	mbox->mbox_cmpl = lpfc_mbx_cmpl_fc_reg_login;
+	mbox->ctx_ndlp = lpfc_nlp_get(fc_ndlp);
+	if (!mbox->ctx_ndlp) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	mbox->vport = vport;
+	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
+	if (rc == MBX_NOT_FINISHED) {
+		rc = -ENODEV;
+		lpfc_nlp_put(fc_ndlp);
+		goto out;
+	}
+	/* Success path. Exit. */
+	lpfc_nlp_set_state(vport, fc_ndlp,
+			   NLP_STE_REG_LOGIN_ISSUE);
+	return 0;
+
+ out:
+	lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
+	lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
+			 "0938 %s: failed to format reg_login "
+			 "Data: x%x x%x x%x x%x\n", __func__,
+			 fc_ndlp->nlp_DID, fc_ndlp->nlp_state,
+			 fc_ndlp->nlp_flag, fc_ndlp->nlp_rpi);
+	return rc;
+}
+
+/**
+ * lpfc_cmpl_els_disc_cmd - Completion callback function for Discovery ELS cmd
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is a generic completion callback function for Discovery ELS cmd.
+ * Currently used by the ELS command issuing routines for the ELS State Change
+ * Request (SCR), lpfc_issue_els_scr() and the ELS RDF, lpfc_issue_els_rdf().
+ * These commands will be retried once only for ELS timeout errors.
+ **/
+static void
+lpfc_cmpl_els_disc_cmd(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		       struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = cmdiocb->vport;
+	IOCB_t *irsp;
+	struct lpfc_els_rdf_rsp *prdf;
+	struct lpfc_dmabuf *pcmd, *prsp;
+	u32 *pdata;
+	u32 cmd;
+	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
+	u32 ulp_status, ulp_word4, tmo, did, iotag;
+
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+	ulp_word4 = get_job_word4(phba, rspiocb);
+	did = get_job_els_rsp64_did(phba, cmdiocb);
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		tmo = get_wqe_tmo(cmdiocb);
+		iotag = get_wqe_reqtag(cmdiocb);
+	} else {
+		irsp = &rspiocb->iocb;
+		tmo = irsp->ulpTimeout;
+		iotag = irsp->ulpIoTag;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"ELS cmd cmpl:    status:x%x/x%x did:x%x",
+		ulp_status, ulp_word4, did);
+
+	/* ELS cmd tag <ulpIoTag> completes */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
+			 "0217 ELS cmd tag x%x completes Data: x%x x%x x%x x%x\n",
+			 iotag, ulp_status, ulp_word4, tmo, cmdiocb->retry);
+
+	pcmd = cmdiocb->cmd_dmabuf;
+	if (!pcmd)
+		goto out;
+
+	pdata = (u32 *)pcmd->virt;
+	if (!pdata)
+		goto out;
+	cmd = *pdata;
+
+	/* Only 1 retry for ELS Timeout only */
+	if (ulp_status == IOSTAT_LOCAL_REJECT &&
+	    ((ulp_word4 & IOERR_PARAM_MASK) ==
+	    IOERR_SEQUENCE_TIMEOUT)) {
+		cmdiocb->retry++;
+		if (cmdiocb->retry <= 1) {
+			switch (cmd) {
+			case ELS_CMD_SCR:
+				lpfc_issue_els_scr(vport, cmdiocb->retry);
+				break;
+			case ELS_CMD_EDC:
+				lpfc_issue_els_edc(vport, cmdiocb->retry);
+				break;
+			case ELS_CMD_RDF:
+				lpfc_issue_els_rdf(vport, cmdiocb->retry);
+				break;
+			}
+			goto out;
+		}
+		phba->fc_stat.elsRetryExceeded++;
+	}
+	if (cmd == ELS_CMD_EDC) {
+		/* must be called before checking uplStatus and returning */
+		lpfc_cmpl_els_edc(phba, cmdiocb, rspiocb);
+		return;
+	}
+	if (ulp_status) {
+		/* ELS discovery cmd completes with error */
+		lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS | LOG_CGN_MGMT,
+				 "4203 ELS cmd x%x error: x%x x%X\n", cmd,
+				 ulp_status, ulp_word4);
+		goto out;
+	}
+
+	/* The RDF response doesn't have any impact on the running driver
+	 * but the notification descriptors are dumped here for support.
+	 */
+	if (cmd == ELS_CMD_RDF) {
+		int i;
+
+		prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
+		if (!prsp)
+			goto out;
+
+		prdf = (struct lpfc_els_rdf_rsp *)prsp->virt;
+		if (!prdf)
+			goto out;
+
+		for (i = 0; i < ELS_RDF_REG_TAG_CNT &&
+			    i < be32_to_cpu(prdf->reg_d1.reg_desc.count); i++)
+			lpfc_printf_vlog(vport, KERN_INFO,
+					 LOG_ELS | LOG_CGN_MGMT,
+					 "4677 Fabric RDF Notification Grant "
+					 "Data: 0x%08x Reg: %x %x\n",
+					 be32_to_cpu(
+						 prdf->reg_d1.desc_tags[i]),
+					 phba->cgn_reg_signal,
+					 phba->cgn_reg_fpin);
+	}
+
+out:
+	/* Check to see if link went down during discovery */
+	lpfc_els_chk_latt(vport);
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(ndlp);
+	return;
+}
+
+/**
+ * lpfc_issue_els_scr - Issue a scr to an node on a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @retry: retry counter for the command IOCB.
+ *
+ * This routine issues a State Change Request (SCR) to a fabric node
+ * on a @vport. The remote node is Fabric Controller (0xfffffd). It
+ * first search the @vport node list to find the matching ndlp. If no such
+ * ndlp is found, a new ndlp shall be created for this (SCR) purpose. An
+ * IOCB is allocated, payload prepared, and the lpfc_sli_issue_iocb()
+ * routine is invoked to send the SCR IOCB.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the SCR ELS command.
+ *
+ * Return code
+ *   0 - Successfully issued scr command
+ *   1 - Failed to issue scr command
+ **/
+int
+lpfc_issue_els_scr(struct lpfc_vport *vport, uint8_t retry)
+{
+	int rc = 0;
+	struct lpfc_hba  *phba = vport->phba;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	uint16_t cmdsize;
+	struct lpfc_nodelist *ndlp;
+
+	cmdsize = (sizeof(uint32_t) + sizeof(SCR));
+
+	ndlp = lpfc_findnode_did(vport, Fabric_Cntl_DID);
+	if (!ndlp) {
+		ndlp = lpfc_nlp_init(vport, Fabric_Cntl_DID);
+		if (!ndlp)
+			return 1;
+		lpfc_enqueue_node(vport, ndlp);
+	}
+
+	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_SCR);
+	if (!elsiocb)
+		return 1;
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		rc = lpfc_reg_fab_ctrl_node(vport, ndlp);
+		if (rc) {
+			lpfc_els_free_iocb(phba, elsiocb);
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
+					 "0937 %s: Failed to reg fc node, rc %d\n",
+					 __func__, rc);
+			return 1;
+		}
+	}
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+
+	*((uint32_t *) (pcmd)) = ELS_CMD_SCR;
+	pcmd += sizeof(uint32_t);
+
+	/* For SCR, remainder of payload is SCR parameter page */
+	memset(pcmd, 0, sizeof(SCR));
+	((SCR *) pcmd)->Function = SCR_FUNC_FULL;
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"Issue SCR:       did:x%x",
+		ndlp->nlp_DID, 0, 0);
+
+	phba->fc_stat.elsXmitSCR++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_disc_cmd;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+			      "Issue SCR:     did:x%x refcnt %d",
+			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+
+	return 0;
+}
+
+/**
+ * lpfc_issue_els_rscn - Issue an RSCN to the Fabric Controller (Fabric)
+ *   or the other nport (pt2pt).
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @retry: number of retries to the command IOCB.
+ *
+ * This routine issues a RSCN to the Fabric Controller (DID 0xFFFFFD)
+ *  when connected to a fabric, or to the remote port when connected
+ *  in point-to-point mode. When sent to the Fabric Controller, it will
+ *  replay the RSCN to registered recipients.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the RSCN ELS command.
+ *
+ * Return code
+ *   0 - Successfully issued RSCN command
+ *   1 - Failed to issue RSCN command
+ **/
+int
+lpfc_issue_els_rscn(struct lpfc_vport *vport, uint8_t retry)
+{
+	int rc = 0;
+	struct lpfc_hba *phba = vport->phba;
+	struct lpfc_iocbq *elsiocb;
+	struct lpfc_nodelist *ndlp;
+	struct {
+		struct fc_els_rscn rscn;
+		struct fc_els_rscn_page portid;
+	} *event;
+	uint32_t nportid;
+	uint16_t cmdsize = sizeof(*event);
+
+	/* Not supported for private loop */
+	if (phba->fc_topology == LPFC_TOPOLOGY_LOOP &&
+	    !(vport->fc_flag & FC_PUBLIC_LOOP))
+		return 1;
+
+	if (vport->fc_flag & FC_PT2PT) {
+		/* find any mapped nport - that would be the other nport */
+		ndlp = lpfc_findnode_mapped(vport);
+		if (!ndlp)
+			return 1;
+	} else {
+		nportid = FC_FID_FCTRL;
+		/* find the fabric controller node */
+		ndlp = lpfc_findnode_did(vport, nportid);
+		if (!ndlp) {
+			/* if one didn't exist, make one */
+			ndlp = lpfc_nlp_init(vport, nportid);
+			if (!ndlp)
+				return 1;
+			lpfc_enqueue_node(vport, ndlp);
+		}
+	}
+
+	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_RSCN_XMT);
+
+	if (!elsiocb)
+		return 1;
+
+	event = elsiocb->cmd_dmabuf->virt;
+
+	event->rscn.rscn_cmd = ELS_RSCN;
+	event->rscn.rscn_page_len = sizeof(struct fc_els_rscn_page);
+	event->rscn.rscn_plen = cpu_to_be16(cmdsize);
+
+	nportid = vport->fc_myDID;
+	/* appears that page flags must be 0 for fabric to broadcast RSCN */
+	event->portid.rscn_page_flags = 0;
+	event->portid.rscn_fid[0] = (nportid & 0x00FF0000) >> 16;
+	event->portid.rscn_fid[1] = (nportid & 0x0000FF00) >> 8;
+	event->portid.rscn_fid[2] = nportid & 0x000000FF;
+
+	phba->fc_stat.elsXmitRSCN++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_cmd;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+			      "Issue RSCN:       did:x%x",
+			      ndlp->nlp_DID, 0, 0);
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+
+	return 0;
+}
+
+/**
+ * lpfc_issue_els_farpr - Issue a farp to an node on a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @nportid: N_Port identifier to the remote node.
+ * @retry: number of retries to the command IOCB.
+ *
+ * This routine issues a Fibre Channel Address Resolution Response
+ * (FARPR) to a node on a vport. The remote node N_Port identifier (@nportid)
+ * is passed into the function. It first search the @vport node list to find
+ * the matching ndlp. If no such ndlp is found, a new ndlp shall be created
+ * for this (FARPR) purpose. An IOCB is allocated, payload prepared, and the
+ * lpfc_sli_issue_iocb() routine is invoked to send the FARPR ELS command.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the FARPR ELS command.
+ *
+ * Return code
+ *   0 - Successfully issued farpr command
+ *   1 - Failed to issue farpr command
+ **/
+static int
+lpfc_issue_els_farpr(struct lpfc_vport *vport, uint32_t nportid, uint8_t retry)
+{
+	int rc = 0;
+	struct lpfc_hba  *phba = vport->phba;
+	struct lpfc_iocbq *elsiocb;
+	FARP *fp;
+	uint8_t *pcmd;
+	uint32_t *lp;
+	uint16_t cmdsize;
+	struct lpfc_nodelist *ondlp;
+	struct lpfc_nodelist *ndlp;
+
+	cmdsize = (sizeof(uint32_t) + sizeof(FARP));
+
+	ndlp = lpfc_findnode_did(vport, nportid);
+	if (!ndlp) {
+		ndlp = lpfc_nlp_init(vport, nportid);
+		if (!ndlp)
+			return 1;
+		lpfc_enqueue_node(vport, ndlp);
+	}
+
+	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_FARPR);
+	if (!elsiocb)
+		return 1;
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+
+	*((uint32_t *) (pcmd)) = ELS_CMD_FARPR;
+	pcmd += sizeof(uint32_t);
+
+	/* Fill in FARPR payload */
+	fp = (FARP *) (pcmd);
+	memset(fp, 0, sizeof(FARP));
+	lp = (uint32_t *) pcmd;
+	*lp++ = be32_to_cpu(nportid);
+	*lp++ = be32_to_cpu(vport->fc_myDID);
+	fp->Rflags = 0;
+	fp->Mflags = (FARP_MATCH_PORT | FARP_MATCH_NODE);
+
+	memcpy(&fp->RportName, &vport->fc_portname, sizeof(struct lpfc_name));
+	memcpy(&fp->RnodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
+	ondlp = lpfc_findnode_did(vport, nportid);
+	if (ondlp) {
+		memcpy(&fp->OportName, &ondlp->nlp_portname,
+		       sizeof(struct lpfc_name));
+		memcpy(&fp->OnodeName, &ondlp->nlp_nodename,
+		       sizeof(struct lpfc_name));
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"Issue FARPR:     did:x%x",
+		ndlp->nlp_DID, 0, 0);
+
+	phba->fc_stat.elsXmitFARPR++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_cmd;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		/* The additional lpfc_nlp_put will cause the following
+		 * lpfc_els_free_iocb routine to trigger the release of
+		 * the node.
+		 */
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+	/* This will cause the callback-function lpfc_cmpl_els_cmd to
+	 * trigger the release of the node.
+	 */
+	/* Don't release reference count as RDF is likely outstanding */
+	return 0;
+}
+
+/**
+ * lpfc_issue_els_rdf - Register for diagnostic functions from the fabric.
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @retry: retry counter for the command IOCB.
+ *
+ * This routine issues an ELS RDF to the Fabric Controller to register
+ * for diagnostic functions.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the RDF ELS command.
+ *
+ * Return code
+ *   0 - Successfully issued rdf command
+ *   1 - Failed to issue rdf command
+ **/
+int
+lpfc_issue_els_rdf(struct lpfc_vport *vport, uint8_t retry)
+{
+	struct lpfc_hba *phba = vport->phba;
+	struct lpfc_iocbq *elsiocb;
+	struct lpfc_els_rdf_req *prdf;
+	struct lpfc_nodelist *ndlp;
+	uint16_t cmdsize;
+	int rc;
+
+	cmdsize = sizeof(*prdf);
+
+	ndlp = lpfc_findnode_did(vport, Fabric_Cntl_DID);
+	if (!ndlp) {
+		ndlp = lpfc_nlp_init(vport, Fabric_Cntl_DID);
+		if (!ndlp)
+			return -ENODEV;
+		lpfc_enqueue_node(vport, ndlp);
+	}
+
+	/* RDF ELS is not required on an NPIV VN_Port. */
+	if (vport->port_type == LPFC_NPIV_PORT)
+		return -EACCES;
+
+	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_RDF);
+	if (!elsiocb)
+		return -ENOMEM;
+
+	/* Configure the payload for the supported FPIN events. */
+	prdf = (struct lpfc_els_rdf_req *)elsiocb->cmd_dmabuf->virt;
+	memset(prdf, 0, cmdsize);
+	prdf->rdf.fpin_cmd = ELS_RDF;
+	prdf->rdf.desc_len = cpu_to_be32(sizeof(struct lpfc_els_rdf_req) -
+					 sizeof(struct fc_els_rdf));
+	prdf->reg_d1.reg_desc.desc_tag = cpu_to_be32(ELS_DTAG_FPIN_REGISTER);
+	prdf->reg_d1.reg_desc.desc_len = cpu_to_be32(
+				FC_TLV_DESC_LENGTH_FROM_SZ(prdf->reg_d1));
+	prdf->reg_d1.reg_desc.count = cpu_to_be32(ELS_RDF_REG_TAG_CNT);
+	prdf->reg_d1.desc_tags[0] = cpu_to_be32(ELS_DTAG_LNK_INTEGRITY);
+	prdf->reg_d1.desc_tags[1] = cpu_to_be32(ELS_DTAG_DELIVERY);
+	prdf->reg_d1.desc_tags[2] = cpu_to_be32(ELS_DTAG_PEER_CONGEST);
+	prdf->reg_d1.desc_tags[3] = cpu_to_be32(ELS_DTAG_CONGESTION);
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
+			 "6444 Xmit RDF to remote NPORT x%x Reg: %x %x\n",
+			 ndlp->nlp_DID, phba->cgn_reg_signal,
+			 phba->cgn_reg_fpin);
+
+	phba->cgn_fpin_frequency = LPFC_FPIN_INIT_FREQ;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_disc_cmd;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return -EIO;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+			      "Issue RDF:     did:x%x refcnt %d",
+			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return -EIO;
+	}
+	return 0;
+}
+
+ /**
+  * lpfc_els_rcv_rdf - Receive RDF ELS request from the fabric.
+  * @vport: pointer to a host virtual N_Port data structure.
+  * @cmdiocb: pointer to lpfc command iocb data structure.
+  * @ndlp: pointer to a node-list data structure.
+  *
+  * A received RDF implies a possible change to fabric supported diagnostic
+  * functions.  This routine sends LS_ACC and then has the Nx_Port issue a new
+  * RDF request to reregister for supported diagnostic functions.
+  *
+  * Return code
+  *   0 - Success
+  *   -EIO - Failed to process received RDF
+  **/
+static int
+lpfc_els_rcv_rdf(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		 struct lpfc_nodelist *ndlp)
+{
+	/* Send LS_ACC */
+	if (lpfc_els_rsp_acc(vport, ELS_CMD_RDF, cmdiocb, ndlp, NULL)) {
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
+				 "1623 Failed to RDF_ACC from x%x for x%x\n",
+				 ndlp->nlp_DID, vport->fc_myDID);
+		return -EIO;
+	}
+
+	/* Issue new RDF for reregistering */
+	if (lpfc_issue_els_rdf(vport, 0)) {
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
+				 "2623 Failed to re register RDF for x%x\n",
+				 vport->fc_myDID);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+/**
+ * lpfc_least_capable_settings - helper function for EDC rsp processing
+ * @phba: pointer to lpfc hba data structure.
+ * @pcgd: pointer to congestion detection descriptor in EDC rsp.
+ *
+ * This helper routine determines the least capable setting for
+ * congestion signals, signal freq, including scale, from the
+ * congestion detection descriptor in the EDC rsp.  The routine
+ * sets @phba values in preparation for a set_featues mailbox.
+ **/
+static void
+lpfc_least_capable_settings(struct lpfc_hba *phba,
+			    struct fc_diag_cg_sig_desc *pcgd)
+{
+	u32 rsp_sig_cap = 0, drv_sig_cap = 0;
+	u32 rsp_sig_freq_cyc = 0, rsp_sig_freq_scale = 0;
+
+	/* Get rsp signal and frequency capabilities.  */
+	rsp_sig_cap = be32_to_cpu(pcgd->xmt_signal_capability);
+	rsp_sig_freq_cyc = be16_to_cpu(pcgd->xmt_signal_frequency.count);
+	rsp_sig_freq_scale = be16_to_cpu(pcgd->xmt_signal_frequency.units);
+
+	/* If the Fport does not support signals. Set FPIN only */
+	if (rsp_sig_cap == EDC_CG_SIG_NOTSUPPORTED)
+		goto out_no_support;
+
+	/* Apply the xmt scale to the xmt cycle to get the correct frequency.
+	 * Adapter default is 100 millisSeconds.  Convert all xmt cycle values
+	 * to milliSeconds.
+	 */
+	switch (rsp_sig_freq_scale) {
+	case EDC_CG_SIGFREQ_SEC:
+		rsp_sig_freq_cyc *= MSEC_PER_SEC;
+		break;
+	case EDC_CG_SIGFREQ_MSEC:
+		rsp_sig_freq_cyc = 1;
+		break;
+	default:
+		goto out_no_support;
+	}
+
+	/* Convenient shorthand. */
+	drv_sig_cap = phba->cgn_reg_signal;
+
+	/* Choose the least capable frequency. */
+	if (rsp_sig_freq_cyc > phba->cgn_sig_freq)
+		phba->cgn_sig_freq = rsp_sig_freq_cyc;
+
+	/* Should be some common signals support. Settle on least capable
+	 * signal and adjust FPIN values. Initialize defaults to ease the
+	 * decision.
+	 */
+	phba->cgn_reg_fpin = LPFC_CGN_FPIN_WARN | LPFC_CGN_FPIN_ALARM;
+	phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
+	if (rsp_sig_cap == EDC_CG_SIG_WARN_ONLY &&
+	    (drv_sig_cap == EDC_CG_SIG_WARN_ONLY ||
+	     drv_sig_cap == EDC_CG_SIG_WARN_ALARM)) {
+		phba->cgn_reg_signal = EDC_CG_SIG_WARN_ONLY;
+		phba->cgn_reg_fpin &= ~LPFC_CGN_FPIN_WARN;
+	}
+	if (rsp_sig_cap == EDC_CG_SIG_WARN_ALARM) {
+		if (drv_sig_cap == EDC_CG_SIG_WARN_ALARM) {
+			phba->cgn_reg_signal = EDC_CG_SIG_WARN_ALARM;
+			phba->cgn_reg_fpin = LPFC_CGN_FPIN_NONE;
+		}
+		if (drv_sig_cap == EDC_CG_SIG_WARN_ONLY) {
+			phba->cgn_reg_signal = EDC_CG_SIG_WARN_ONLY;
+			phba->cgn_reg_fpin &= ~LPFC_CGN_FPIN_WARN;
+		}
+	}
+
+	/* We are NOT recording signal frequency in congestion info buffer */
+	return;
+
+out_no_support:
+	phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
+	phba->cgn_sig_freq = 0;
+	phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
+}
+
+DECLARE_ENUM2STR_LOOKUP(lpfc_get_tlv_dtag_nm, fc_ls_tlv_dtag,
+			FC_LS_TLV_DTAG_INIT);
+
+/**
+ * lpfc_cmpl_els_edc - Completion callback function for EDC
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the completion callback function for issuing the Exchange
+ * Diagnostic Capabilities (EDC) command. The driver issues an EDC to
+ * notify the FPort of its Congestion and Link Fault capabilities.  This
+ * routine parses the FPort's response and decides on the least common
+ * values applicable to both FPort and NPort for Warnings and Alarms that
+ * are communicated via hardware signals.
+ **/
+static void
+lpfc_cmpl_els_edc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		  struct lpfc_iocbq *rspiocb)
+{
+	IOCB_t *irsp_iocb;
+	struct fc_els_edc_resp *edc_rsp;
+	struct fc_tlv_desc *tlv;
+	struct fc_diag_cg_sig_desc *pcgd;
+	struct fc_diag_lnkflt_desc *plnkflt;
+	struct lpfc_dmabuf *pcmd, *prsp;
+	const char *dtag_nm;
+	u32 *pdata, dtag;
+	int desc_cnt = 0, bytes_remain;
+	bool rcv_cap_desc = false;
+	struct lpfc_nodelist *ndlp;
+	u32 ulp_status, ulp_word4, tmo, did, iotag;
+
+	ndlp = cmdiocb->ndlp;
+
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+	ulp_word4 = get_job_word4(phba, rspiocb);
+	did = get_job_els_rsp64_did(phba, rspiocb);
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		tmo = get_wqe_tmo(rspiocb);
+		iotag = get_wqe_reqtag(rspiocb);
+	} else {
+		irsp_iocb = &rspiocb->iocb;
+		tmo = irsp_iocb->ulpTimeout;
+		iotag = irsp_iocb->ulpIoTag;
+	}
+
+	lpfc_debugfs_disc_trc(phba->pport, LPFC_DISC_TRC_ELS_CMD,
+			      "EDC cmpl:    status:x%x/x%x did:x%x",
+			      ulp_status, ulp_word4, did);
+
+	/* ELS cmd tag <ulpIoTag> completes */
+	lpfc_printf_log(phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
+			"4201 EDC cmd tag x%x completes Data: x%x x%x x%x\n",
+			iotag, ulp_status, ulp_word4, tmo);
+
+	pcmd = cmdiocb->cmd_dmabuf;
+	if (!pcmd)
+		goto out;
+
+	pdata = (u32 *)pcmd->virt;
+	if (!pdata)
+		goto out;
+
+	/* Need to clear signal values, send features MB and RDF with FPIN. */
+	if (ulp_status)
+		goto out;
+
+	prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
+	if (!prsp)
+		goto out;
+
+	edc_rsp = prsp->virt;
+	if (!edc_rsp)
+		goto out;
+
+	/* ELS cmd tag <ulpIoTag> completes */
+	lpfc_printf_log(phba, KERN_INFO,
+			LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
+			"4676 Fabric EDC Rsp: "
+			"0x%02x, 0x%08x\n",
+			edc_rsp->acc_hdr.la_cmd,
+			be32_to_cpu(edc_rsp->desc_list_len));
+
+	/*
+	 * Payload length in bytes is the response descriptor list
+	 * length minus the 12 bytes of Link Service Request
+	 * Information descriptor in the reply.
+	 */
+	bytes_remain = be32_to_cpu(edc_rsp->desc_list_len) -
+				   sizeof(struct fc_els_lsri_desc);
+	if (bytes_remain <= 0)
+		goto out;
+
+	tlv = edc_rsp->desc;
+
+	/*
+	 * cycle through EDC diagnostic descriptors to find the
+	 * congestion signaling capability descriptor
+	 */
+	while (bytes_remain) {
+		if (bytes_remain < FC_TLV_DESC_HDR_SZ) {
+			lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
+					"6461 Truncated TLV hdr on "
+					"Diagnostic descriptor[%d]\n",
+					desc_cnt);
+			goto out;
+		}
+
+		dtag = be32_to_cpu(tlv->desc_tag);
+		switch (dtag) {
+		case ELS_DTAG_LNK_FAULT_CAP:
+			if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
+			    FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
+					sizeof(struct fc_diag_lnkflt_desc)) {
+				lpfc_printf_log(phba, KERN_WARNING,
+					LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
+					"6462 Truncated Link Fault Diagnostic "
+					"descriptor[%d]: %d vs 0x%zx 0x%zx\n",
+					desc_cnt, bytes_remain,
+					FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
+					sizeof(struct fc_diag_lnkflt_desc));
+				goto out;
+			}
+			plnkflt = (struct fc_diag_lnkflt_desc *)tlv;
+			lpfc_printf_log(phba, KERN_INFO,
+				LOG_ELS | LOG_LDS_EVENT,
+				"4617 Link Fault Desc Data: 0x%08x 0x%08x "
+				"0x%08x 0x%08x 0x%08x\n",
+				be32_to_cpu(plnkflt->desc_tag),
+				be32_to_cpu(plnkflt->desc_len),
+				be32_to_cpu(
+					plnkflt->degrade_activate_threshold),
+				be32_to_cpu(
+					plnkflt->degrade_deactivate_threshold),
+				be32_to_cpu(plnkflt->fec_degrade_interval));
+			break;
+		case ELS_DTAG_CG_SIGNAL_CAP:
+			if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
+			    FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
+					sizeof(struct fc_diag_cg_sig_desc)) {
+				lpfc_printf_log(
+					phba, KERN_WARNING, LOG_CGN_MGMT,
+					"6463 Truncated Cgn Signal Diagnostic "
+					"descriptor[%d]: %d vs 0x%zx 0x%zx\n",
+					desc_cnt, bytes_remain,
+					FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
+					sizeof(struct fc_diag_cg_sig_desc));
+				goto out;
+			}
+
+			pcgd = (struct fc_diag_cg_sig_desc *)tlv;
+			lpfc_printf_log(
+				phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
+				"4616 CGN Desc Data: 0x%08x 0x%08x "
+				"0x%08x 0x%04x 0x%04x 0x%08x 0x%04x 0x%04x\n",
+				be32_to_cpu(pcgd->desc_tag),
+				be32_to_cpu(pcgd->desc_len),
+				be32_to_cpu(pcgd->xmt_signal_capability),
+				be16_to_cpu(pcgd->xmt_signal_frequency.count),
+				be16_to_cpu(pcgd->xmt_signal_frequency.units),
+				be32_to_cpu(pcgd->rcv_signal_capability),
+				be16_to_cpu(pcgd->rcv_signal_frequency.count),
+				be16_to_cpu(pcgd->rcv_signal_frequency.units));
+
+			/* Compare driver and Fport capabilities and choose
+			 * least common.
+			 */
+			lpfc_least_capable_settings(phba, pcgd);
+			rcv_cap_desc = true;
+			break;
+		default:
+			dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
+			lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
+					"4919 unknown Diagnostic "
+					"Descriptor[%d]: tag x%x (%s)\n",
+					desc_cnt, dtag, dtag_nm);
+		}
+
+		bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
+		tlv = fc_tlv_next_desc(tlv);
+		desc_cnt++;
+	}
+
+out:
+	if (!rcv_cap_desc) {
+		phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
+		phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
+		phba->cgn_sig_freq = 0;
+		lpfc_printf_log(phba, KERN_WARNING, LOG_ELS | LOG_CGN_MGMT,
+				"4202 EDC rsp error - sending RDF "
+				"for FPIN only.\n");
+	}
+
+	lpfc_config_cgn_signal(phba);
+
+	/* Check to see if link went down during discovery */
+	lpfc_els_chk_latt(phba->pport);
+	lpfc_debugfs_disc_trc(phba->pport, LPFC_DISC_TRC_ELS_CMD,
+			      "EDC Cmpl:     did:x%x refcnt %d",
+			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(ndlp);
+}
+
+static void
+lpfc_format_edc_lft_desc(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
+{
+	struct fc_diag_lnkflt_desc *lft = (struct fc_diag_lnkflt_desc *)tlv;
+
+	lft->desc_tag = cpu_to_be32(ELS_DTAG_LNK_FAULT_CAP);
+	lft->desc_len = cpu_to_be32(
+		FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_diag_lnkflt_desc));
+
+	lft->degrade_activate_threshold =
+		cpu_to_be32(phba->degrade_activate_threshold);
+	lft->degrade_deactivate_threshold =
+		cpu_to_be32(phba->degrade_deactivate_threshold);
+	lft->fec_degrade_interval = cpu_to_be32(phba->fec_degrade_interval);
+}
+
+static void
+lpfc_format_edc_cgn_desc(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
+{
+	struct fc_diag_cg_sig_desc *cgd = (struct fc_diag_cg_sig_desc *)tlv;
+
+	/* We are assuming cgd was zero'ed before calling this routine */
+
+	/* Configure the congestion detection capability */
+	cgd->desc_tag = cpu_to_be32(ELS_DTAG_CG_SIGNAL_CAP);
+
+	/* Descriptor len doesn't include the tag or len fields. */
+	cgd->desc_len = cpu_to_be32(
+		FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_diag_cg_sig_desc));
+
+	/* xmt_signal_capability already set to EDC_CG_SIG_NOTSUPPORTED.
+	 * xmt_signal_frequency.count already set to 0.
+	 * xmt_signal_frequency.units already set to 0.
+	 */
+
+	if (phba->cmf_active_mode == LPFC_CFG_OFF) {
+		/* rcv_signal_capability already set to EDC_CG_SIG_NOTSUPPORTED.
+		 * rcv_signal_frequency.count already set to 0.
+		 * rcv_signal_frequency.units already set to 0.
+		 */
+		phba->cgn_sig_freq = 0;
+		return;
+	}
+	switch (phba->cgn_reg_signal) {
+	case EDC_CG_SIG_WARN_ONLY:
+		cgd->rcv_signal_capability = cpu_to_be32(EDC_CG_SIG_WARN_ONLY);
+		break;
+	case EDC_CG_SIG_WARN_ALARM:
+		cgd->rcv_signal_capability = cpu_to_be32(EDC_CG_SIG_WARN_ALARM);
+		break;
+	default:
+		/* rcv_signal_capability left 0 thus no support */
+		break;
+	}
+
+	/* We start negotiation with lpfc_fabric_cgn_frequency, after
+	 * the completion we settle on the higher frequency.
+	 */
+	cgd->rcv_signal_frequency.count =
+		cpu_to_be16(lpfc_fabric_cgn_frequency);
+	cgd->rcv_signal_frequency.units =
+		cpu_to_be16(EDC_CG_SIGFREQ_MSEC);
+}
+
+static bool
+lpfc_link_is_lds_capable(struct lpfc_hba *phba)
+{
+	if (!(phba->lmt & LMT_64Gb))
+		return false;
+	if (phba->sli_rev != LPFC_SLI_REV4)
+		return false;
+
+	if (phba->sli4_hba.conf_trunk) {
+		if (phba->trunk_link.phy_lnk_speed == LPFC_USER_LINK_SPEED_64G)
+			return true;
+	} else if (phba->fc_linkspeed == LPFC_LINK_SPEED_64GHZ) {
+		return true;
+	}
+	return false;
+}
+
+ /**
+  * lpfc_issue_els_edc - Exchange Diagnostic Capabilities with the fabric.
+  * @vport: pointer to a host virtual N_Port data structure.
+  * @retry: retry counter for the command iocb.
+  *
+  * This routine issues an ELS EDC to the F-Port Controller to communicate
+  * this N_Port's support of hardware signals in its Congestion
+  * Capabilities Descriptor.
+  *
+  * Note: This routine does not check if one or more signals are
+  * set in the cgn_reg_signal parameter.  The caller makes the
+  * decision to enforce cgn_reg_signal as nonzero or zero depending
+  * on the conditions.  During Fabric requests, the driver
+  * requires cgn_reg_signals to be nonzero.  But a dynamic request
+  * to set the congestion mode to OFF from Monitor or Manage
+  * would correctly issue an EDC with no signals enabled to
+  * turn off switch functionality and then update the FW.
+  *
+  * Return code
+  *   0 - Successfully issued edc command
+  *   1 - Failed to issue edc command
+  **/
+int
+lpfc_issue_els_edc(struct lpfc_vport *vport, uint8_t retry)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	struct lpfc_iocbq *elsiocb;
+	struct fc_els_edc *edc_req;
+	struct fc_tlv_desc *tlv;
+	u16 cmdsize;
+	struct lpfc_nodelist *ndlp;
+	u8 *pcmd = NULL;
+	u32 cgn_desc_size, lft_desc_size;
+	int rc;
+
+	if (vport->port_type == LPFC_NPIV_PORT)
+		return -EACCES;
+
+	ndlp = lpfc_findnode_did(vport, Fabric_DID);
+	if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
+		return -ENODEV;
+
+	cgn_desc_size = (phba->cgn_init_reg_signal) ?
+				sizeof(struct fc_diag_cg_sig_desc) : 0;
+	lft_desc_size = (lpfc_link_is_lds_capable(phba)) ?
+				sizeof(struct fc_diag_lnkflt_desc) : 0;
+	cmdsize = cgn_desc_size + lft_desc_size;
+
+	/* Skip EDC if no applicable descriptors */
+	if (!cmdsize)
+		goto try_rdf;
+
+	cmdsize += sizeof(struct fc_els_edc);
+	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_EDC);
+	if (!elsiocb)
+		goto try_rdf;
+
+	/* Configure the payload for the supported Diagnostics capabilities. */
+	pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
+	memset(pcmd, 0, cmdsize);
+	edc_req = (struct fc_els_edc *)pcmd;
+	edc_req->desc_len = cpu_to_be32(cgn_desc_size + lft_desc_size);
+	edc_req->edc_cmd = ELS_EDC;
+	tlv = edc_req->desc;
+
+	if (cgn_desc_size) {
+		lpfc_format_edc_cgn_desc(phba, tlv);
+		phba->cgn_sig_freq = lpfc_fabric_cgn_frequency;
+		tlv = fc_tlv_next_desc(tlv);
+	}
+
+	if (lft_desc_size)
+		lpfc_format_edc_lft_desc(phba, tlv);
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
+			 "4623 Xmit EDC to remote "
+			 "NPORT x%x reg_sig x%x reg_fpin:x%x\n",
+			 ndlp->nlp_DID, phba->cgn_reg_signal,
+			 phba->cgn_reg_fpin);
+
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_disc_cmd;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return -EIO;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+			      "Issue EDC:     did:x%x refcnt %d",
+			      ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		/* The additional lpfc_nlp_put will cause the following
+		 * lpfc_els_free_iocb routine to trigger the rlease of
+		 * the node.
+		 */
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		goto try_rdf;
+	}
+	return 0;
+try_rdf:
+	phba->cgn_reg_fpin = LPFC_CGN_FPIN_WARN | LPFC_CGN_FPIN_ALARM;
+	phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
+	rc = lpfc_issue_els_rdf(vport, 0);
+	return rc;
+}
+
+/**
+ * lpfc_cancel_retry_delay_tmo - Cancel the timer with delayed iocb-cmd retry
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @nlp: pointer to a node-list data structure.
+ *
+ * This routine cancels the timer with a delayed IOCB-command retry for
+ * a @vport's @ndlp. It stops the timer for the delayed function retrial and
+ * removes the ELS retry event if it presents. In addition, if the
+ * NLP_NPR_2B_DISC bit is set in the @nlp's nlp_flag bitmap, ADISC IOCB
+ * commands are sent for the @vport's nodes that require issuing discovery
+ * ADISC.
+ **/
+void
+lpfc_cancel_retry_delay_tmo(struct lpfc_vport *vport, struct lpfc_nodelist *nlp)
+{
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_work_evt *evtp;
+
+	if (!(nlp->nlp_flag & NLP_DELAY_TMO))
+		return;
+	spin_lock_irq(&nlp->lock);
+	nlp->nlp_flag &= ~NLP_DELAY_TMO;
+	spin_unlock_irq(&nlp->lock);
+	del_timer_sync(&nlp->nlp_delayfunc);
+	nlp->nlp_last_elscmd = 0;
+	if (!list_empty(&nlp->els_retry_evt.evt_listp)) {
+		list_del_init(&nlp->els_retry_evt.evt_listp);
+		/* Decrement nlp reference count held for the delayed retry */
+		evtp = &nlp->els_retry_evt;
+		lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1);
+	}
+	if (nlp->nlp_flag & NLP_NPR_2B_DISC) {
+		spin_lock_irq(&nlp->lock);
+		nlp->nlp_flag &= ~NLP_NPR_2B_DISC;
+		spin_unlock_irq(&nlp->lock);
+		if (vport->num_disc_nodes) {
+			if (vport->port_state < LPFC_VPORT_READY) {
+				/* Check if there are more ADISCs to be sent */
+				lpfc_more_adisc(vport);
+			} else {
+				/* Check if there are more PLOGIs to be sent */
+				lpfc_more_plogi(vport);
+				if (vport->num_disc_nodes == 0) {
+					spin_lock_irq(shost->host_lock);
+					vport->fc_flag &= ~FC_NDISC_ACTIVE;
+					spin_unlock_irq(shost->host_lock);
+					lpfc_can_disctmo(vport);
+					lpfc_end_rscn(vport);
+				}
+			}
+		}
+	}
+	return;
+}
+
+/**
+ * lpfc_els_retry_delay - Timer function with a ndlp delayed function timer
+ * @t: pointer to the timer function associated data (ndlp).
+ *
+ * This routine is invoked by the ndlp delayed-function timer to check
+ * whether there is any pending ELS retry event(s) with the node. If not, it
+ * simply returns. Otherwise, if there is at least one ELS delayed event, it
+ * adds the delayed events to the HBA work list and invokes the
+ * lpfc_worker_wake_up() routine to wake up worker thread to process the
+ * event. Note that lpfc_nlp_get() is called before posting the event to
+ * the work list to hold reference count of ndlp so that it guarantees the
+ * reference to ndlp will still be available when the worker thread gets
+ * to the event associated with the ndlp.
+ **/
+void
+lpfc_els_retry_delay(struct timer_list *t)
+{
+	struct lpfc_nodelist *ndlp = from_timer(ndlp, t, nlp_delayfunc);
+	struct lpfc_vport *vport = ndlp->vport;
+	struct lpfc_hba   *phba = vport->phba;
+	unsigned long flags;
+	struct lpfc_work_evt  *evtp = &ndlp->els_retry_evt;
+
+	spin_lock_irqsave(&phba->hbalock, flags);
+	if (!list_empty(&evtp->evt_listp)) {
+		spin_unlock_irqrestore(&phba->hbalock, flags);
+		return;
+	}
+
+	/* We need to hold the node by incrementing the reference
+	 * count until the queued work is done
+	 */
+	evtp->evt_arg1  = lpfc_nlp_get(ndlp);
+	if (evtp->evt_arg1) {
+		evtp->evt = LPFC_EVT_ELS_RETRY;
+		list_add_tail(&evtp->evt_listp, &phba->work_list);
+		lpfc_worker_wake_up(phba);
+	}
+	spin_unlock_irqrestore(&phba->hbalock, flags);
+	return;
+}
+
+/**
+ * lpfc_els_retry_delay_handler - Work thread handler for ndlp delayed function
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine is the worker-thread handler for processing the @ndlp delayed
+ * event(s), posted by the lpfc_els_retry_delay() routine. It simply retrieves
+ * the last ELS command from the associated ndlp and invokes the proper ELS
+ * function according to the delayed ELS command to retry the command.
+ **/
+void
+lpfc_els_retry_delay_handler(struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_vport *vport = ndlp->vport;
+	uint32_t cmd, retry;
+
+	spin_lock_irq(&ndlp->lock);
+	cmd = ndlp->nlp_last_elscmd;
+	ndlp->nlp_last_elscmd = 0;
+
+	if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
+		spin_unlock_irq(&ndlp->lock);
+		return;
+	}
+
+	ndlp->nlp_flag &= ~NLP_DELAY_TMO;
+	spin_unlock_irq(&ndlp->lock);
+	/*
+	 * If a discovery event readded nlp_delayfunc after timer
+	 * firing and before processing the timer, cancel the
+	 * nlp_delayfunc.
+	 */
+	del_timer_sync(&ndlp->nlp_delayfunc);
+	retry = ndlp->nlp_retry;
+	ndlp->nlp_retry = 0;
+
+	switch (cmd) {
+	case ELS_CMD_FLOGI:
+		lpfc_issue_els_flogi(vport, ndlp, retry);
+		break;
+	case ELS_CMD_PLOGI:
+		if (!lpfc_issue_els_plogi(vport, ndlp->nlp_DID, retry)) {
+			ndlp->nlp_prev_state = ndlp->nlp_state;
+			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
+		}
+		break;
+	case ELS_CMD_ADISC:
+		if (!lpfc_issue_els_adisc(vport, ndlp, retry)) {
+			ndlp->nlp_prev_state = ndlp->nlp_state;
+			lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
+		}
+		break;
+	case ELS_CMD_PRLI:
+	case ELS_CMD_NVMEPRLI:
+		if (!lpfc_issue_els_prli(vport, ndlp, retry)) {
+			ndlp->nlp_prev_state = ndlp->nlp_state;
+			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
+		}
+		break;
+	case ELS_CMD_LOGO:
+		if (!lpfc_issue_els_logo(vport, ndlp, retry)) {
+			ndlp->nlp_prev_state = ndlp->nlp_state;
+			lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
+		}
+		break;
+	case ELS_CMD_FDISC:
+		if (!(vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI))
+			lpfc_issue_els_fdisc(vport, ndlp, retry);
+		break;
+	}
+	return;
+}
+
+/**
+ * lpfc_link_reset - Issue link reset
+ * @vport: pointer to a virtual N_Port data structure.
+ *
+ * This routine performs link reset by sending INIT_LINK mailbox command.
+ * For SLI-3 adapter, link attention interrupt is enabled before issuing
+ * INIT_LINK mailbox command.
+ *
+ * Return code
+ *   0 - Link reset initiated successfully
+ *   1 - Failed to initiate link reset
+ **/
+int
+lpfc_link_reset(struct lpfc_vport *vport)
+{
+	struct lpfc_hba *phba = vport->phba;
+	LPFC_MBOXQ_t *mbox;
+	uint32_t control;
+	int rc;
+
+	lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
+			 "2851 Attempt link reset\n");
+	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+	if (!mbox) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
+				"2852 Failed to allocate mbox memory");
+		return 1;
+	}
+
+	/* Enable Link attention interrupts */
+	if (phba->sli_rev <= LPFC_SLI_REV3) {
+		spin_lock_irq(&phba->hbalock);
+		phba->sli.sli_flag |= LPFC_PROCESS_LA;
+		control = readl(phba->HCregaddr);
+		control |= HC_LAINT_ENA;
+		writel(control, phba->HCregaddr);
+		readl(phba->HCregaddr); /* flush */
+		spin_unlock_irq(&phba->hbalock);
+	}
+
+	lpfc_init_link(phba, mbox, phba->cfg_topology,
+		       phba->cfg_link_speed);
+	mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
+	mbox->vport = vport;
+	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
+	if ((rc != MBX_BUSY) && (rc != MBX_SUCCESS)) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
+				"2853 Failed to issue INIT_LINK "
+				"mbox command, rc:x%x\n", rc);
+		mempool_free(mbox, phba->mbox_mem_pool);
+		return 1;
+	}
+
+	return 0;
+}
+
+/**
+ * lpfc_els_retry - Make retry decision on an els command iocb
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine makes a retry decision on an ELS command IOCB, which has
+ * failed. The following ELS IOCBs use this function for retrying the command
+ * when previously issued command responsed with error status: FLOGI, PLOGI,
+ * PRLI, ADISC and FDISC. Based on the ELS command type and the
+ * returned error status, it makes the decision whether a retry shall be
+ * issued for the command, and whether a retry shall be made immediately or
+ * delayed. In the former case, the corresponding ELS command issuing-function
+ * is called to retry the command. In the later case, the ELS command shall
+ * be posted to the ndlp delayed event and delayed function timer set to the
+ * ndlp for the delayed command issusing.
+ *
+ * Return code
+ *   0 - No retry of els command is made
+ *   1 - Immediate or delayed retry of els command is made
+ **/
+static int
+lpfc_els_retry(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+	       struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = cmdiocb->vport;
+	union lpfc_wqe128 *irsp = &rspiocb->wqe;
+	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
+	struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf;
+	uint32_t *elscmd;
+	struct ls_rjt stat;
+	int retry = 0, maxretry = lpfc_max_els_tries, delay = 0;
+	int logerr = 0;
+	uint32_t cmd = 0;
+	uint32_t did;
+	int link_reset = 0, rc;
+	u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
+	u32 ulp_word4 = get_job_word4(phba, rspiocb);
+
+
+	/* Note: cmd_dmabuf may be 0 for internal driver abort
+	 * of delays ELS command.
+	 */
+
+	if (pcmd && pcmd->virt) {
+		elscmd = (uint32_t *) (pcmd->virt);
+		cmd = *elscmd++;
+	}
+
+	if (ndlp)
+		did = ndlp->nlp_DID;
+	else {
+		/* We should only hit this case for retrying PLOGI */
+		did = get_job_els_rsp64_did(phba, rspiocb);
+		ndlp = lpfc_findnode_did(vport, did);
+		if (!ndlp && (cmd != ELS_CMD_PLOGI))
+			return 0;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"Retry ELS:       wd7:x%x wd4:x%x did:x%x",
+		*(((uint32_t *)irsp) + 7), ulp_word4, did);
+
+	switch (ulp_status) {
+	case IOSTAT_FCP_RSP_ERROR:
+		break;
+	case IOSTAT_REMOTE_STOP:
+		if (phba->sli_rev == LPFC_SLI_REV4) {
+			/* This IO was aborted by the target, we don't
+			 * know the rxid and because we did not send the
+			 * ABTS we cannot generate and RRQ.
+			 */
+			lpfc_set_rrq_active(phba, ndlp,
+					 cmdiocb->sli4_lxritag, 0, 0);
+		}
+		break;
+	case IOSTAT_LOCAL_REJECT:
+		switch ((ulp_word4 & IOERR_PARAM_MASK)) {
+		case IOERR_LOOP_OPEN_FAILURE:
+			if (cmd == ELS_CMD_PLOGI && cmdiocb->retry == 0)
+				delay = 1000;
+			retry = 1;
+			break;
+
+		case IOERR_ILLEGAL_COMMAND:
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+					 "0124 Retry illegal cmd x%x "
+					 "retry:x%x delay:x%x\n",
+					 cmd, cmdiocb->retry, delay);
+			retry = 1;
+			/* All command's retry policy */
+			maxretry = 8;
+			if (cmdiocb->retry > 2)
+				delay = 1000;
+			break;
+
+		case IOERR_NO_RESOURCES:
+			logerr = 1; /* HBA out of resources */
+			retry = 1;
+			if (cmdiocb->retry > 100)
+				delay = 100;
+			maxretry = 250;
+			break;
+
+		case IOERR_ILLEGAL_FRAME:
+			delay = 100;
+			retry = 1;
+			break;
+
+		case IOERR_INVALID_RPI:
+			if (cmd == ELS_CMD_PLOGI &&
+			    did == NameServer_DID) {
+				/* Continue forever if plogi to */
+				/* the nameserver fails */
+				maxretry = 0;
+				delay = 100;
+			}
+			retry = 1;
+			break;
+
+		case IOERR_SEQUENCE_TIMEOUT:
+			if (cmd == ELS_CMD_PLOGI &&
+			    did == NameServer_DID &&
+			    (cmdiocb->retry + 1) == maxretry) {
+				/* Reset the Link */
+				link_reset = 1;
+				break;
+			}
+			retry = 1;
+			delay = 100;
+			break;
+		case IOERR_SLI_ABORTED:
+			/* Retry ELS PLOGI command?
+			 * Possibly the rport just wasn't ready.
+			 */
+			if (cmd == ELS_CMD_PLOGI) {
+				/* No retry if state change */
+				if (ndlp &&
+				    ndlp->nlp_state != NLP_STE_PLOGI_ISSUE)
+					goto out_retry;
+				retry = 1;
+				maxretry = 2;
+			}
+			break;
+		}
+		break;
+
+	case IOSTAT_NPORT_RJT:
+	case IOSTAT_FABRIC_RJT:
+		if (ulp_word4 & RJT_UNAVAIL_TEMP) {
+			retry = 1;
+			break;
+		}
+		break;
+
+	case IOSTAT_NPORT_BSY:
+	case IOSTAT_FABRIC_BSY:
+		logerr = 1; /* Fabric / Remote NPort out of resources */
+		retry = 1;
+		break;
+
+	case IOSTAT_LS_RJT:
+		stat.un.ls_rjt_error_be = cpu_to_be32(ulp_word4);
+		/* Added for Vendor specifc support
+		 * Just keep retrying for these Rsn / Exp codes
+		 */
+		if ((vport->fc_flag & FC_PT2PT) &&
+		    cmd == ELS_CMD_NVMEPRLI) {
+			switch (stat.un.b.lsRjtRsnCode) {
+			case LSRJT_UNABLE_TPC:
+			case LSRJT_INVALID_CMD:
+			case LSRJT_LOGICAL_ERR:
+			case LSRJT_CMD_UNSUPPORTED:
+				lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
+						 "0168 NVME PRLI LS_RJT "
+						 "reason %x port doesn't "
+						 "support NVME, disabling NVME\n",
+						 stat.un.b.lsRjtRsnCode);
+				retry = 0;
+				vport->fc_flag |= FC_PT2PT_NO_NVME;
+				goto out_retry;
+			}
+		}
+		switch (stat.un.b.lsRjtRsnCode) {
+		case LSRJT_UNABLE_TPC:
+			/* Special case for PRLI LS_RJTs. Recall that lpfc
+			 * uses a single routine to issue both PRLI FC4 types.
+			 * If the PRLI is rejected because that FC4 type
+			 * isn't really supported, don't retry and cause
+			 * multiple transport registrations.  Otherwise, parse
+			 * the reason code/reason code explanation and take the
+			 * appropriate action.
+			 */
+			lpfc_printf_vlog(vport, KERN_INFO,
+					 LOG_DISCOVERY | LOG_ELS | LOG_NODE,
+					 "0153 ELS cmd x%x LS_RJT by x%x. "
+					 "RsnCode x%x RsnCodeExp x%x\n",
+					 cmd, did, stat.un.b.lsRjtRsnCode,
+					 stat.un.b.lsRjtRsnCodeExp);
+
+			switch (stat.un.b.lsRjtRsnCodeExp) {
+			case LSEXP_CANT_GIVE_DATA:
+			case LSEXP_CMD_IN_PROGRESS:
+				if (cmd == ELS_CMD_PLOGI) {
+					delay = 1000;
+					maxretry = 48;
+				}
+				retry = 1;
+				break;
+			case LSEXP_REQ_UNSUPPORTED:
+			case LSEXP_NO_RSRC_ASSIGN:
+				/* These explanation codes get no retry. */
+				if (cmd == ELS_CMD_PRLI ||
+				    cmd == ELS_CMD_NVMEPRLI)
+					break;
+				fallthrough;
+			default:
+				/* Limit the delay and retry action to a limited
+				 * cmd set.  There are other ELS commands where
+				 * a retry is not expected.
+				 */
+				if (cmd == ELS_CMD_PLOGI ||
+				    cmd == ELS_CMD_PRLI ||
+				    cmd == ELS_CMD_NVMEPRLI) {
+					delay = 1000;
+					maxretry = lpfc_max_els_tries + 1;
+					retry = 1;
+				}
+				break;
+			}
+
+			if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
+			  (cmd == ELS_CMD_FDISC) &&
+			  (stat.un.b.lsRjtRsnCodeExp == LSEXP_OUT_OF_RESOURCE)){
+				lpfc_printf_vlog(vport, KERN_ERR,
+						 LOG_TRACE_EVENT,
+						 "0125 FDISC Failed (x%x). "
+						 "Fabric out of resources\n",
+						 stat.un.lsRjtError);
+				lpfc_vport_set_state(vport,
+						     FC_VPORT_NO_FABRIC_RSCS);
+			}
+			break;
+
+		case LSRJT_LOGICAL_BSY:
+			if ((cmd == ELS_CMD_PLOGI) ||
+			    (cmd == ELS_CMD_PRLI) ||
+			    (cmd == ELS_CMD_NVMEPRLI)) {
+				delay = 1000;
+				maxretry = 48;
+			} else if (cmd == ELS_CMD_FDISC) {
+				/* FDISC retry policy */
+				maxretry = 48;
+				if (cmdiocb->retry >= 32)
+					delay = 1000;
+			}
+			retry = 1;
+			break;
+
+		case LSRJT_LOGICAL_ERR:
+			/* There are some cases where switches return this
+			 * error when they are not ready and should be returning
+			 * Logical Busy. We should delay every time.
+			 */
+			if (cmd == ELS_CMD_FDISC &&
+			    stat.un.b.lsRjtRsnCodeExp == LSEXP_PORT_LOGIN_REQ) {
+				maxretry = 3;
+				delay = 1000;
+				retry = 1;
+			} else if (cmd == ELS_CMD_FLOGI &&
+				   stat.un.b.lsRjtRsnCodeExp ==
+						LSEXP_NOTHING_MORE) {
+				vport->fc_sparam.cmn.bbRcvSizeMsb &= 0xf;
+				retry = 1;
+				lpfc_printf_vlog(vport, KERN_ERR,
+						 LOG_TRACE_EVENT,
+						 "0820 FLOGI Failed (x%x). "
+						 "BBCredit Not Supported\n",
+						 stat.un.lsRjtError);
+			}
+			break;
+
+		case LSRJT_PROTOCOL_ERR:
+			if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
+			  (cmd == ELS_CMD_FDISC) &&
+			  ((stat.un.b.lsRjtRsnCodeExp == LSEXP_INVALID_PNAME) ||
+			  (stat.un.b.lsRjtRsnCodeExp == LSEXP_INVALID_NPORT_ID))
+			  ) {
+				lpfc_printf_vlog(vport, KERN_ERR,
+						 LOG_TRACE_EVENT,
+						 "0122 FDISC Failed (x%x). "
+						 "Fabric Detected Bad WWN\n",
+						 stat.un.lsRjtError);
+				lpfc_vport_set_state(vport,
+						     FC_VPORT_FABRIC_REJ_WWN);
+			}
+			break;
+		case LSRJT_VENDOR_UNIQUE:
+			if ((stat.un.b.vendorUnique == 0x45) &&
+			    (cmd == ELS_CMD_FLOGI)) {
+				goto out_retry;
+			}
+			break;
+		case LSRJT_CMD_UNSUPPORTED:
+			/* lpfc nvmet returns this type of LS_RJT when it
+			 * receives an FCP PRLI because lpfc nvmet only
+			 * support NVME.  ELS request is terminated for FCP4
+			 * on this rport.
+			 */
+			if (stat.un.b.lsRjtRsnCodeExp ==
+			    LSEXP_REQ_UNSUPPORTED) {
+				if (cmd == ELS_CMD_PRLI)
+					goto out_retry;
+			}
+			break;
+		}
+		break;
+
+	case IOSTAT_INTERMED_RSP:
+	case IOSTAT_BA_RJT:
+		break;
+
+	default:
+		break;
+	}
+
+	if (link_reset) {
+		rc = lpfc_link_reset(vport);
+		if (rc) {
+			/* Do not give up. Retry PLOGI one more time and attempt
+			 * link reset if PLOGI fails again.
+			 */
+			retry = 1;
+			delay = 100;
+			goto out_retry;
+		}
+		return 1;
+	}
+
+	if (did == FDMI_DID)
+		retry = 1;
+
+	if ((cmd == ELS_CMD_FLOGI) &&
+	    (phba->fc_topology != LPFC_TOPOLOGY_LOOP) &&
+	    !lpfc_error_lost_link(ulp_status, ulp_word4)) {
+		/* FLOGI retry policy */
+		retry = 1;
+		/* retry FLOGI forever */
+		if (phba->link_flag != LS_LOOPBACK_MODE)
+			maxretry = 0;
+		else
+			maxretry = 2;
+
+		if (cmdiocb->retry >= 100)
+			delay = 5000;
+		else if (cmdiocb->retry >= 32)
+			delay = 1000;
+	} else if ((cmd == ELS_CMD_FDISC) &&
+	    !lpfc_error_lost_link(ulp_status, ulp_word4)) {
+		/* retry FDISCs every second up to devloss */
+		retry = 1;
+		maxretry = vport->cfg_devloss_tmo;
+		delay = 1000;
+	}
+
+	cmdiocb->retry++;
+	if (maxretry && (cmdiocb->retry >= maxretry)) {
+		phba->fc_stat.elsRetryExceeded++;
+		retry = 0;
+	}
+
+	if ((vport->load_flag & FC_UNLOADING) != 0)
+		retry = 0;
+
+out_retry:
+	if (retry) {
+		if ((cmd == ELS_CMD_PLOGI) || (cmd == ELS_CMD_FDISC)) {
+			/* Stop retrying PLOGI and FDISC if in FCF discovery */
+			if (phba->fcf.fcf_flag & FCF_DISCOVERY) {
+				lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+						 "2849 Stop retry ELS command "
+						 "x%x to remote NPORT x%x, "
+						 "Data: x%x x%x\n", cmd, did,
+						 cmdiocb->retry, delay);
+				return 0;
+			}
+		}
+
+		/* Retry ELS command <elsCmd> to remote NPORT <did> */
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+				 "0107 Retry ELS command x%x to remote "
+				 "NPORT x%x Data: x%x x%x\n",
+				 cmd, did, cmdiocb->retry, delay);
+
+		if (((cmd == ELS_CMD_PLOGI) || (cmd == ELS_CMD_ADISC)) &&
+			((ulp_status != IOSTAT_LOCAL_REJECT) ||
+			((ulp_word4 & IOERR_PARAM_MASK) !=
+			IOERR_NO_RESOURCES))) {
+			/* Don't reset timer for no resources */
+
+			/* If discovery / RSCN timer is running, reset it */
+			if (timer_pending(&vport->fc_disctmo) ||
+			    (vport->fc_flag & FC_RSCN_MODE))
+				lpfc_set_disctmo(vport);
+		}
+
+		phba->fc_stat.elsXmitRetry++;
+		if (ndlp && delay) {
+			phba->fc_stat.elsDelayRetry++;
+			ndlp->nlp_retry = cmdiocb->retry;
+
+			/* delay is specified in milliseconds */
+			mod_timer(&ndlp->nlp_delayfunc,
+				jiffies + msecs_to_jiffies(delay));
+			spin_lock_irq(&ndlp->lock);
+			ndlp->nlp_flag |= NLP_DELAY_TMO;
+			spin_unlock_irq(&ndlp->lock);
+
+			ndlp->nlp_prev_state = ndlp->nlp_state;
+			if ((cmd == ELS_CMD_PRLI) ||
+			    (cmd == ELS_CMD_NVMEPRLI))
+				lpfc_nlp_set_state(vport, ndlp,
+					NLP_STE_PRLI_ISSUE);
+			else if (cmd != ELS_CMD_ADISC)
+				lpfc_nlp_set_state(vport, ndlp,
+					NLP_STE_NPR_NODE);
+			ndlp->nlp_last_elscmd = cmd;
+
+			return 1;
+		}
+		switch (cmd) {
+		case ELS_CMD_FLOGI:
+			lpfc_issue_els_flogi(vport, ndlp, cmdiocb->retry);
+			return 1;
+		case ELS_CMD_FDISC:
+			lpfc_issue_els_fdisc(vport, ndlp, cmdiocb->retry);
+			return 1;
+		case ELS_CMD_PLOGI:
+			if (ndlp) {
+				ndlp->nlp_prev_state = ndlp->nlp_state;
+				lpfc_nlp_set_state(vport, ndlp,
+						   NLP_STE_PLOGI_ISSUE);
+			}
+			lpfc_issue_els_plogi(vport, did, cmdiocb->retry);
+			return 1;
+		case ELS_CMD_ADISC:
+			ndlp->nlp_prev_state = ndlp->nlp_state;
+			lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
+			lpfc_issue_els_adisc(vport, ndlp, cmdiocb->retry);
+			return 1;
+		case ELS_CMD_PRLI:
+		case ELS_CMD_NVMEPRLI:
+			ndlp->nlp_prev_state = ndlp->nlp_state;
+			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
+			lpfc_issue_els_prli(vport, ndlp, cmdiocb->retry);
+			return 1;
+		case ELS_CMD_LOGO:
+			ndlp->nlp_prev_state = ndlp->nlp_state;
+			lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
+			lpfc_issue_els_logo(vport, ndlp, cmdiocb->retry);
+			return 1;
+		}
+	}
+	/* No retry ELS command <elsCmd> to remote NPORT <did> */
+	if (logerr) {
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+			 "0137 No retry ELS command x%x to remote "
+			 "NPORT x%x: Out of Resources: Error:x%x/%x\n",
+			 cmd, did, ulp_status,
+			 ulp_word4);
+	}
+	else {
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0108 No retry ELS command x%x to remote "
+			 "NPORT x%x Retried:%d Error:x%x/%x\n",
+			 cmd, did, cmdiocb->retry, ulp_status,
+			 ulp_word4);
+	}
+	return 0;
+}
+
+/**
+ * lpfc_els_free_data - Free lpfc dma buffer and data structure with an iocb
+ * @phba: pointer to lpfc hba data structure.
+ * @buf_ptr1: pointer to the lpfc DMA buffer data structure.
+ *
+ * This routine releases the lpfc DMA (Direct Memory Access) buffer(s)
+ * associated with a command IOCB back to the lpfc DMA buffer pool. It first
+ * checks to see whether there is a lpfc DMA buffer associated with the
+ * response of the command IOCB. If so, it will be released before releasing
+ * the lpfc DMA buffer associated with the IOCB itself.
+ *
+ * Return code
+ *   0 - Successfully released lpfc DMA buffer (currently, always return 0)
+ **/
+static int
+lpfc_els_free_data(struct lpfc_hba *phba, struct lpfc_dmabuf *buf_ptr1)
+{
+	struct lpfc_dmabuf *buf_ptr;
+
+	/* Free the response before processing the command. */
+	if (!list_empty(&buf_ptr1->list)) {
+		list_remove_head(&buf_ptr1->list, buf_ptr,
+				 struct lpfc_dmabuf,
+				 list);
+		lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
+		kfree(buf_ptr);
+	}
+	lpfc_mbuf_free(phba, buf_ptr1->virt, buf_ptr1->phys);
+	kfree(buf_ptr1);
+	return 0;
+}
+
+/**
+ * lpfc_els_free_bpl - Free lpfc dma buffer and data structure with bpl
+ * @phba: pointer to lpfc hba data structure.
+ * @buf_ptr: pointer to the lpfc dma buffer data structure.
+ *
+ * This routine releases the lpfc Direct Memory Access (DMA) buffer
+ * associated with a Buffer Pointer List (BPL) back to the lpfc DMA buffer
+ * pool.
+ *
+ * Return code
+ *   0 - Successfully released lpfc DMA buffer (currently, always return 0)
+ **/
+static int
+lpfc_els_free_bpl(struct lpfc_hba *phba, struct lpfc_dmabuf *buf_ptr)
+{
+	lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
+	kfree(buf_ptr);
+	return 0;
+}
+
+/**
+ * lpfc_els_free_iocb - Free a command iocb and its associated resources
+ * @phba: pointer to lpfc hba data structure.
+ * @elsiocb: pointer to lpfc els command iocb data structure.
+ *
+ * This routine frees a command IOCB and its associated resources. The
+ * command IOCB data structure contains the reference to various associated
+ * resources, these fields must be set to NULL if the associated reference
+ * not present:
+ *   cmd_dmabuf - reference to cmd.
+ *   cmd_dmabuf->next - reference to rsp
+ *   rsp_dmabuf - unused
+ *   bpl_dmabuf - reference to bpl
+ *
+ * It first properly decrements the reference count held on ndlp for the
+ * IOCB completion callback function. If LPFC_DELAY_MEM_FREE flag is not
+ * set, it invokes the lpfc_els_free_data() routine to release the Direct
+ * Memory Access (DMA) buffers associated with the IOCB. Otherwise, it
+ * adds the DMA buffer the @phba data structure for the delayed release.
+ * If reference to the Buffer Pointer List (BPL) is present, the
+ * lpfc_els_free_bpl() routine is invoked to release the DMA memory
+ * associated with BPL. Finally, the lpfc_sli_release_iocbq() routine is
+ * invoked to release the IOCB data structure back to @phba IOCBQ list.
+ *
+ * Return code
+ *   0 - Success (currently, always return 0)
+ **/
+int
+lpfc_els_free_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *elsiocb)
+{
+	struct lpfc_dmabuf *buf_ptr, *buf_ptr1;
+
+	/* The I/O iocb is complete.  Clear the node and first dmbuf */
+	elsiocb->ndlp = NULL;
+
+	/* cmd_dmabuf = cmd,  cmd_dmabuf->next = rsp, bpl_dmabuf = bpl */
+	if (elsiocb->cmd_dmabuf) {
+		if (elsiocb->cmd_flag & LPFC_DELAY_MEM_FREE) {
+			/* Firmware could still be in progress of DMAing
+			 * payload, so don't free data buffer till after
+			 * a hbeat.
+			 */
+			elsiocb->cmd_flag &= ~LPFC_DELAY_MEM_FREE;
+			buf_ptr = elsiocb->cmd_dmabuf;
+			elsiocb->cmd_dmabuf = NULL;
+			if (buf_ptr) {
+				buf_ptr1 = NULL;
+				spin_lock_irq(&phba->hbalock);
+				if (!list_empty(&buf_ptr->list)) {
+					list_remove_head(&buf_ptr->list,
+						buf_ptr1, struct lpfc_dmabuf,
+						list);
+					INIT_LIST_HEAD(&buf_ptr1->list);
+					list_add_tail(&buf_ptr1->list,
+						&phba->elsbuf);
+					phba->elsbuf_cnt++;
+				}
+				INIT_LIST_HEAD(&buf_ptr->list);
+				list_add_tail(&buf_ptr->list, &phba->elsbuf);
+				phba->elsbuf_cnt++;
+				spin_unlock_irq(&phba->hbalock);
+			}
+		} else {
+			buf_ptr1 = elsiocb->cmd_dmabuf;
+			lpfc_els_free_data(phba, buf_ptr1);
+			elsiocb->cmd_dmabuf = NULL;
+		}
+	}
+
+	if (elsiocb->bpl_dmabuf) {
+		buf_ptr = elsiocb->bpl_dmabuf;
+		lpfc_els_free_bpl(phba, buf_ptr);
+		elsiocb->bpl_dmabuf = NULL;
+	}
+	lpfc_sli_release_iocbq(phba, elsiocb);
+	return 0;
+}
+
+/**
+ * lpfc_cmpl_els_logo_acc - Completion callback function to logo acc response
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the completion callback function to the Logout (LOGO)
+ * Accept (ACC) Response ELS command. This routine is invoked to indicate
+ * the completion of the LOGO process. If the node has transitioned to NPR,
+ * this routine unregisters the RPI if it is still registered. The
+ * lpfc_els_free_iocb() is invoked to release the IOCB data structure.
+ **/
+static void
+lpfc_cmpl_els_logo_acc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		       struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
+	struct lpfc_vport *vport = cmdiocb->vport;
+	u32 ulp_status, ulp_word4;
+
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+	ulp_word4 = get_job_word4(phba, rspiocb);
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
+		"ACC LOGO cmpl:   status:x%x/x%x did:x%x",
+		ulp_status, ulp_word4, ndlp->nlp_DID);
+	/* ACC to LOGO completes to NPort <nlp_DID> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0109 ACC to LOGO completes to NPort x%x refcnt %d "
+			 "Data: x%x x%x x%x\n",
+			 ndlp->nlp_DID, kref_read(&ndlp->kref), ndlp->nlp_flag,
+			 ndlp->nlp_state, ndlp->nlp_rpi);
+
+	/* This clause allows the LOGO ACC to complete and free resources
+	 * for the Fabric Domain Controller.  It does deliberately skip
+	 * the unreg_rpi and release rpi because some fabrics send RDP
+	 * requests after logging out from the initiator.
+	 */
+	if (ndlp->nlp_type & NLP_FABRIC &&
+	    ((ndlp->nlp_DID & WELL_KNOWN_DID_MASK) != WELL_KNOWN_DID_MASK))
+		goto out;
+
+	if (ndlp->nlp_state == NLP_STE_NPR_NODE) {
+		/* If PLOGI is being retried, PLOGI completion will cleanup the
+		 * node. The NLP_NPR_2B_DISC flag needs to be retained to make
+		 * progress on nodes discovered from last RSCN.
+		 */
+		if ((ndlp->nlp_flag & NLP_DELAY_TMO) &&
+		    (ndlp->nlp_last_elscmd == ELS_CMD_PLOGI))
+			goto out;
+
+		if (ndlp->nlp_flag & NLP_RPI_REGISTERED)
+			lpfc_unreg_rpi(vport, ndlp);
+
+	}
+ out:
+	/*
+	 * The driver received a LOGO from the rport and has ACK'd it.
+	 * At this point, the driver is done so release the IOCB
+	 */
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(ndlp);
+}
+
+/**
+ * lpfc_mbx_cmpl_dflt_rpi - Completion callbk func for unreg dflt rpi mbox cmd
+ * @phba: pointer to lpfc hba data structure.
+ * @pmb: pointer to the driver internal queue element for mailbox command.
+ *
+ * This routine is the completion callback function for unregister default
+ * RPI (Remote Port Index) mailbox command to the @phba. It simply releases
+ * the associated lpfc Direct Memory Access (DMA) buffer back to the pool and
+ * decrements the ndlp reference count held for this completion callback
+ * function. After that, it invokes the lpfc_drop_node to check
+ * whether it is appropriate to release the node.
+ **/
+void
+lpfc_mbx_cmpl_dflt_rpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
+{
+	struct lpfc_nodelist *ndlp = pmb->ctx_ndlp;
+	u32 mbx_flag = pmb->mbox_flag;
+	u32 mbx_cmd = pmb->u.mb.mbxCommand;
+
+	if (ndlp) {
+		lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
+				 "0006 rpi x%x DID:%x flg:%x %d x%px "
+				 "mbx_cmd x%x mbx_flag x%x x%px\n",
+				 ndlp->nlp_rpi, ndlp->nlp_DID, ndlp->nlp_flag,
+				 kref_read(&ndlp->kref), ndlp, mbx_cmd,
+				 mbx_flag, pmb);
+
+		/* This ends the default/temporary RPI cleanup logic for this
+		 * ndlp and the node and rpi needs to be released. Free the rpi
+		 * first on an UNREG_LOGIN and then release the final
+		 * references.
+		 */
+		spin_lock_irq(&ndlp->lock);
+		ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
+		if (mbx_cmd == MBX_UNREG_LOGIN)
+			ndlp->nlp_flag &= ~NLP_UNREG_INP;
+		spin_unlock_irq(&ndlp->lock);
+		lpfc_nlp_put(ndlp);
+		lpfc_drop_node(ndlp->vport, ndlp);
+	}
+
+	lpfc_mbox_rsrc_cleanup(phba, pmb, MBOX_THD_UNLOCKED);
+}
+
+/**
+ * lpfc_cmpl_els_rsp - Completion callback function for els response iocb cmd
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the completion callback function for ELS Response IOCB
+ * command. In normal case, this callback function just properly sets the
+ * nlp_flag bitmap in the ndlp data structure, if the mbox command reference
+ * field in the command IOCB is not NULL, the referred mailbox command will
+ * be send out, and then invokes the lpfc_els_free_iocb() routine to release
+ * the IOCB.
+ **/
+static void
+lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		  struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
+	struct lpfc_vport *vport = ndlp ? ndlp->vport : NULL;
+	struct Scsi_Host  *shost = vport ? lpfc_shost_from_vport(vport) : NULL;
+	IOCB_t  *irsp;
+	LPFC_MBOXQ_t *mbox = NULL;
+	u32 ulp_status, ulp_word4, tmo, did, iotag;
+
+	if (!vport) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
+				"3177 ELS response failed\n");
+		goto out;
+	}
+	if (cmdiocb->context_un.mbox)
+		mbox = cmdiocb->context_un.mbox;
+
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+	ulp_word4 = get_job_word4(phba, rspiocb);
+	did = get_job_els_rsp64_did(phba, cmdiocb);
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		tmo = get_wqe_tmo(cmdiocb);
+		iotag = get_wqe_reqtag(cmdiocb);
+	} else {
+		irsp = &rspiocb->iocb;
+		tmo = irsp->ulpTimeout;
+		iotag = irsp->ulpIoTag;
+	}
+
+	/* Check to see if link went down during discovery */
+	if (!ndlp || lpfc_els_chk_latt(vport)) {
+		if (mbox)
+			lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
+		goto out;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
+		"ELS rsp cmpl:    status:x%x/x%x did:x%x",
+		ulp_status, ulp_word4, did);
+	/* ELS response tag <ulpIoTag> completes */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0110 ELS response tag x%x completes "
+			 "Data: x%x x%x x%x x%x x%x x%x x%x x%x %p %p\n",
+			 iotag, ulp_status, ulp_word4, tmo,
+			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
+			 ndlp->nlp_rpi, kref_read(&ndlp->kref), mbox, ndlp);
+	if (mbox) {
+		if (ulp_status == 0
+		    && (ndlp->nlp_flag & NLP_ACC_REGLOGIN)) {
+			if (!lpfc_unreg_rpi(vport, ndlp) &&
+			    (!(vport->fc_flag & FC_PT2PT))) {
+				if (ndlp->nlp_state ==  NLP_STE_PLOGI_ISSUE ||
+				    ndlp->nlp_state ==
+				     NLP_STE_REG_LOGIN_ISSUE) {
+					lpfc_printf_vlog(vport, KERN_INFO,
+							 LOG_DISCOVERY,
+							 "0314 PLOGI recov "
+							 "DID x%x "
+							 "Data: x%x x%x x%x\n",
+							 ndlp->nlp_DID,
+							 ndlp->nlp_state,
+							 ndlp->nlp_rpi,
+							 ndlp->nlp_flag);
+					goto out_free_mbox;
+				}
+			}
+
+			/* Increment reference count to ndlp to hold the
+			 * reference to ndlp for the callback function.
+			 */
+			mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
+			if (!mbox->ctx_ndlp)
+				goto out_free_mbox;
+
+			mbox->vport = vport;
+			if (ndlp->nlp_flag & NLP_RM_DFLT_RPI) {
+				mbox->mbox_flag |= LPFC_MBX_IMED_UNREG;
+				mbox->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi;
+			}
+			else {
+				mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
+				ndlp->nlp_prev_state = ndlp->nlp_state;
+				lpfc_nlp_set_state(vport, ndlp,
+					   NLP_STE_REG_LOGIN_ISSUE);
+			}
+
+			ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
+			if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
+			    != MBX_NOT_FINISHED)
+				goto out;
+
+			/* Decrement the ndlp reference count we
+			 * set for this failed mailbox command.
+			 */
+			lpfc_nlp_put(ndlp);
+			ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
+
+			/* ELS rsp: Cannot issue reg_login for <NPortid> */
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				"0138 ELS rsp: Cannot issue reg_login for x%x "
+				"Data: x%x x%x x%x\n",
+				ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
+				ndlp->nlp_rpi);
+		}
+out_free_mbox:
+		lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
+	}
+out:
+	if (ndlp && shost) {
+		spin_lock_irq(&ndlp->lock);
+		if (mbox)
+			ndlp->nlp_flag &= ~NLP_ACC_REGLOGIN;
+		ndlp->nlp_flag &= ~NLP_RM_DFLT_RPI;
+		spin_unlock_irq(&ndlp->lock);
+	}
+
+	/* An SLI4 NPIV instance wants to drop the node at this point under
+	 * these conditions and release the RPI.
+	 */
+	if (phba->sli_rev == LPFC_SLI_REV4 &&
+	    vport && vport->port_type == LPFC_NPIV_PORT &&
+	    !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD)) {
+		if (ndlp->nlp_flag & NLP_RELEASE_RPI) {
+			if (ndlp->nlp_state != NLP_STE_PLOGI_ISSUE &&
+			    ndlp->nlp_state != NLP_STE_REG_LOGIN_ISSUE) {
+				lpfc_sli4_free_rpi(phba, ndlp->nlp_rpi);
+				spin_lock_irq(&ndlp->lock);
+				ndlp->nlp_rpi = LPFC_RPI_ALLOC_ERROR;
+				ndlp->nlp_flag &= ~NLP_RELEASE_RPI;
+				spin_unlock_irq(&ndlp->lock);
+			}
+			lpfc_drop_node(vport, ndlp);
+		} else if (ndlp->nlp_state != NLP_STE_PLOGI_ISSUE &&
+			   ndlp->nlp_state != NLP_STE_REG_LOGIN_ISSUE &&
+			   ndlp->nlp_state != NLP_STE_PRLI_ISSUE) {
+			/* Drop ndlp if there is no planned or outstanding
+			 * issued PRLI.
+			 *
+			 * In cases when the ndlp is acting as both an initiator
+			 * and target function, let our issued PRLI determine
+			 * the final ndlp kref drop.
+			 */
+			lpfc_drop_node(vport, ndlp);
+		}
+	}
+
+	/* Release the originating I/O reference. */
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(ndlp);
+	return;
+}
+
+/**
+ * lpfc_els_rsp_acc - Prepare and issue an acc response iocb command
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @flag: the els command code to be accepted.
+ * @oldiocb: pointer to the original lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ * @mbox: pointer to the driver internal queue element for mailbox command.
+ *
+ * This routine prepares and issues an Accept (ACC) response IOCB
+ * command. It uses the @flag to properly set up the IOCB field for the
+ * specific ACC response command to be issued and invokes the
+ * lpfc_sli_issue_iocb() routine to send out ACC response IOCB. If a
+ * @mbox pointer is passed in, it will be put into the context_un.mbox
+ * field of the IOCB for the completion callback function to issue the
+ * mailbox command to the HBA later when callback is invoked.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the corresponding
+ * response ELS IOCB command.
+ *
+ * Return code
+ *   0 - Successfully issued acc response
+ *   1 - Failed to issue acc response
+ **/
+int
+lpfc_els_rsp_acc(struct lpfc_vport *vport, uint32_t flag,
+		 struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
+		 LPFC_MBOXQ_t *mbox)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	IOCB_t *icmd;
+	IOCB_t *oldcmd;
+	union lpfc_wqe128 *wqe;
+	union lpfc_wqe128 *oldwqe = &oldiocb->wqe;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	struct serv_parm *sp;
+	uint16_t cmdsize;
+	int rc;
+	ELS_PKT *els_pkt_ptr;
+	struct fc_els_rdf_resp *rdf_resp;
+
+	switch (flag) {
+	case ELS_CMD_ACC:
+		cmdsize = sizeof(uint32_t);
+		elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
+					     ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
+		if (!elsiocb) {
+			spin_lock_irq(&ndlp->lock);
+			ndlp->nlp_flag &= ~NLP_LOGO_ACC;
+			spin_unlock_irq(&ndlp->lock);
+			return 1;
+		}
+
+		if (phba->sli_rev == LPFC_SLI_REV4) {
+			wqe = &elsiocb->wqe;
+			/* XRI / rx_id */
+			bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
+			       bf_get(wqe_ctxt_tag,
+				      &oldwqe->xmit_els_rsp.wqe_com));
+
+			/* oxid */
+			bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+			       bf_get(wqe_rcvoxid,
+				      &oldwqe->xmit_els_rsp.wqe_com));
+		} else {
+			icmd = &elsiocb->iocb;
+			oldcmd = &oldiocb->iocb;
+			icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
+			icmd->unsli3.rcvsli3.ox_id =
+				oldcmd->unsli3.rcvsli3.ox_id;
+		}
+
+		pcmd = elsiocb->cmd_dmabuf->virt;
+		*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
+		pcmd += sizeof(uint32_t);
+
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
+			"Issue ACC:       did:x%x flg:x%x",
+			ndlp->nlp_DID, ndlp->nlp_flag, 0);
+		break;
+	case ELS_CMD_FLOGI:
+	case ELS_CMD_PLOGI:
+		cmdsize = (sizeof(struct serv_parm) + sizeof(uint32_t));
+		elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
+					     ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
+		if (!elsiocb)
+			return 1;
+
+		if (phba->sli_rev == LPFC_SLI_REV4) {
+			wqe = &elsiocb->wqe;
+			/* XRI / rx_id */
+			bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
+			       bf_get(wqe_ctxt_tag,
+				      &oldwqe->xmit_els_rsp.wqe_com));
+
+			/* oxid */
+			bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+			       bf_get(wqe_rcvoxid,
+				      &oldwqe->xmit_els_rsp.wqe_com));
+		} else {
+			icmd = &elsiocb->iocb;
+			oldcmd = &oldiocb->iocb;
+			icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
+			icmd->unsli3.rcvsli3.ox_id =
+				oldcmd->unsli3.rcvsli3.ox_id;
+		}
+
+		pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
+
+		if (mbox)
+			elsiocb->context_un.mbox = mbox;
+
+		*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
+		pcmd += sizeof(uint32_t);
+		sp = (struct serv_parm *)pcmd;
+
+		if (flag == ELS_CMD_FLOGI) {
+			/* Copy the received service parameters back */
+			memcpy(sp, &phba->fc_fabparam,
+			       sizeof(struct serv_parm));
+
+			/* Clear the F_Port bit */
+			sp->cmn.fPort = 0;
+
+			/* Mark all class service parameters as invalid */
+			sp->cls1.classValid = 0;
+			sp->cls2.classValid = 0;
+			sp->cls3.classValid = 0;
+			sp->cls4.classValid = 0;
+
+			/* Copy our worldwide names */
+			memcpy(&sp->portName, &vport->fc_sparam.portName,
+			       sizeof(struct lpfc_name));
+			memcpy(&sp->nodeName, &vport->fc_sparam.nodeName,
+			       sizeof(struct lpfc_name));
+		} else {
+			memcpy(pcmd, &vport->fc_sparam,
+			       sizeof(struct serv_parm));
+
+			sp->cmn.valid_vendor_ver_level = 0;
+			memset(sp->un.vendorVersion, 0,
+			       sizeof(sp->un.vendorVersion));
+			sp->cmn.bbRcvSizeMsb &= 0xF;
+
+			/* If our firmware supports this feature, convey that
+			 * info to the target using the vendor specific field.
+			 */
+			if (phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) {
+				sp->cmn.valid_vendor_ver_level = 1;
+				sp->un.vv.vid = cpu_to_be32(LPFC_VV_EMLX_ID);
+				sp->un.vv.flags =
+					cpu_to_be32(LPFC_VV_SUPPRESS_RSP);
+			}
+		}
+
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
+			"Issue ACC FLOGI/PLOGI: did:x%x flg:x%x",
+			ndlp->nlp_DID, ndlp->nlp_flag, 0);
+		break;
+	case ELS_CMD_PRLO:
+		cmdsize = sizeof(uint32_t) + sizeof(PRLO);
+		elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
+					     ndlp, ndlp->nlp_DID, ELS_CMD_PRLO);
+		if (!elsiocb)
+			return 1;
+
+		if (phba->sli_rev == LPFC_SLI_REV4) {
+			wqe = &elsiocb->wqe;
+			/* XRI / rx_id */
+			bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
+			       bf_get(wqe_ctxt_tag,
+				      &oldwqe->xmit_els_rsp.wqe_com));
+
+			/* oxid */
+			bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+			       bf_get(wqe_rcvoxid,
+				      &oldwqe->xmit_els_rsp.wqe_com));
+		} else {
+			icmd = &elsiocb->iocb;
+			oldcmd = &oldiocb->iocb;
+			icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
+			icmd->unsli3.rcvsli3.ox_id =
+				oldcmd->unsli3.rcvsli3.ox_id;
+		}
+
+		pcmd = (u8 *) elsiocb->cmd_dmabuf->virt;
+
+		memcpy(pcmd, oldiocb->cmd_dmabuf->virt,
+		       sizeof(uint32_t) + sizeof(PRLO));
+		*((uint32_t *) (pcmd)) = ELS_CMD_PRLO_ACC;
+		els_pkt_ptr = (ELS_PKT *) pcmd;
+		els_pkt_ptr->un.prlo.acceptRspCode = PRLO_REQ_EXECUTED;
+
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
+			"Issue ACC PRLO:  did:x%x flg:x%x",
+			ndlp->nlp_DID, ndlp->nlp_flag, 0);
+		break;
+	case ELS_CMD_RDF:
+		cmdsize = sizeof(*rdf_resp);
+		elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
+					     ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
+		if (!elsiocb)
+			return 1;
+
+		if (phba->sli_rev == LPFC_SLI_REV4) {
+			wqe = &elsiocb->wqe;
+			/* XRI / rx_id */
+			bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
+			       bf_get(wqe_ctxt_tag,
+				      &oldwqe->xmit_els_rsp.wqe_com));
+
+			/* oxid */
+			bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+			       bf_get(wqe_rcvoxid,
+				      &oldwqe->xmit_els_rsp.wqe_com));
+		} else {
+			icmd = &elsiocb->iocb;
+			oldcmd = &oldiocb->iocb;
+			icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
+			icmd->unsli3.rcvsli3.ox_id =
+				oldcmd->unsli3.rcvsli3.ox_id;
+		}
+
+		pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
+		rdf_resp = (struct fc_els_rdf_resp *)pcmd;
+		memset(rdf_resp, 0, sizeof(*rdf_resp));
+		rdf_resp->acc_hdr.la_cmd = ELS_LS_ACC;
+
+		/* FC-LS-5 specifies desc_list_len shall be set to 12 */
+		rdf_resp->desc_list_len = cpu_to_be32(12);
+
+		/* FC-LS-5 specifies LS REQ Information descriptor */
+		rdf_resp->lsri.desc_tag = cpu_to_be32(1);
+		rdf_resp->lsri.desc_len = cpu_to_be32(sizeof(u32));
+		rdf_resp->lsri.rqst_w0.cmd = ELS_RDF;
+		break;
+	default:
+		return 1;
+	}
+	if (ndlp->nlp_flag & NLP_LOGO_ACC) {
+		spin_lock_irq(&ndlp->lock);
+		if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED ||
+			ndlp->nlp_flag & NLP_REG_LOGIN_SEND))
+			ndlp->nlp_flag &= ~NLP_LOGO_ACC;
+		spin_unlock_irq(&ndlp->lock);
+		elsiocb->cmd_cmpl = lpfc_cmpl_els_logo_acc;
+	} else {
+		elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+	}
+
+	phba->fc_stat.elsXmitACC++;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+
+	/* Xmit ELS ACC response tag <ulpIoTag> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0128 Xmit ELS ACC response Status: x%x, IoTag: x%x, "
+			 "XRI: x%x, DID: x%x, nlp_flag: x%x nlp_state: x%x "
+			 "RPI: x%x, fc_flag x%x refcnt %d\n",
+			 rc, elsiocb->iotag, elsiocb->sli4_xritag,
+			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
+			 ndlp->nlp_rpi, vport->fc_flag, kref_read(&ndlp->kref));
+	return 0;
+}
+
+/**
+ * lpfc_els_rsp_reject - Prepare and issue a rjt response iocb command
+ * @vport: pointer to a virtual N_Port data structure.
+ * @rejectError: reject response to issue
+ * @oldiocb: pointer to the original lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ * @mbox: pointer to the driver internal queue element for mailbox command.
+ *
+ * This routine prepares and issue an Reject (RJT) response IOCB
+ * command. If a @mbox pointer is passed in, it will be put into the
+ * context_un.mbox field of the IOCB for the completion callback function
+ * to issue to the HBA later.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the reject response
+ * ELS IOCB command.
+ *
+ * Return code
+ *   0 - Successfully issued reject response
+ *   1 - Failed to issue reject response
+ **/
+int
+lpfc_els_rsp_reject(struct lpfc_vport *vport, uint32_t rejectError,
+		    struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
+		    LPFC_MBOXQ_t *mbox)
+{
+	int rc;
+	struct lpfc_hba  *phba = vport->phba;
+	IOCB_t *icmd;
+	IOCB_t *oldcmd;
+	union lpfc_wqe128 *wqe;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	uint16_t cmdsize;
+
+	cmdsize = 2 * sizeof(uint32_t);
+	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_LS_RJT);
+	if (!elsiocb)
+		return 1;
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
+		       get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
+		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+		       get_job_rcvoxid(phba, oldiocb));
+	} else {
+		icmd = &elsiocb->iocb;
+		oldcmd = &oldiocb->iocb;
+		icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
+		icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
+	}
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+
+	*((uint32_t *) (pcmd)) = ELS_CMD_LS_RJT;
+	pcmd += sizeof(uint32_t);
+	*((uint32_t *) (pcmd)) = rejectError;
+
+	if (mbox)
+		elsiocb->context_un.mbox = mbox;
+
+	/* Xmit ELS RJT <err> response tag <ulpIoTag> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0129 Xmit ELS RJT x%x response tag x%x "
+			 "xri x%x, did x%x, nlp_flag x%x, nlp_state x%x, "
+			 "rpi x%x\n",
+			 rejectError, elsiocb->iotag,
+			 get_job_ulpcontext(phba, elsiocb), ndlp->nlp_DID,
+			 ndlp->nlp_flag, ndlp->nlp_state, ndlp->nlp_rpi);
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
+		"Issue LS_RJT:    did:x%x flg:x%x err:x%x",
+		ndlp->nlp_DID, ndlp->nlp_flag, rejectError);
+
+	phba->fc_stat.elsXmitLSRJT++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	/* The NPIV instance is rejecting this unsolicited ELS. Make sure the
+	 * node's assigned RPI gets released provided this node is not already
+	 * registered with the transport.
+	 */
+	if (phba->sli_rev == LPFC_SLI_REV4 &&
+	    vport->port_type == LPFC_NPIV_PORT &&
+	    !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD)) {
+		spin_lock_irq(&ndlp->lock);
+		ndlp->nlp_flag |= NLP_RELEASE_RPI;
+		spin_unlock_irq(&ndlp->lock);
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+
+	return 0;
+}
+
+ /**
+  * lpfc_issue_els_edc_rsp - Exchange Diagnostic Capabilities with the fabric.
+  * @vport: pointer to a host virtual N_Port data structure.
+  * @cmdiocb: pointer to the original lpfc command iocb data structure.
+  * @ndlp: NPort to where rsp is directed
+  *
+  * This routine issues an EDC ACC RSP to the F-Port Controller to communicate
+  * this N_Port's support of hardware signals in its Congestion
+  * Capabilities Descriptor.
+  *
+  * Return code
+  *   0 - Successfully issued edc rsp command
+  *   1 - Failed to issue edc rsp command
+  **/
+static int
+lpfc_issue_els_edc_rsp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		       struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	struct fc_els_edc_resp *edc_rsp;
+	struct fc_tlv_desc *tlv;
+	struct lpfc_iocbq *elsiocb;
+	IOCB_t *icmd, *cmd;
+	union lpfc_wqe128 *wqe;
+	u32 cgn_desc_size, lft_desc_size;
+	u16 cmdsize;
+	uint8_t *pcmd;
+	int rc;
+
+	cmdsize = sizeof(struct fc_els_edc_resp);
+	cgn_desc_size = sizeof(struct fc_diag_cg_sig_desc);
+	lft_desc_size = (lpfc_link_is_lds_capable(phba)) ?
+				sizeof(struct fc_diag_lnkflt_desc) : 0;
+	cmdsize += cgn_desc_size + lft_desc_size;
+	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, cmdiocb->retry,
+				     ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
+	if (!elsiocb)
+		return 1;
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
+		       get_job_ulpcontext(phba, cmdiocb)); /* Xri / rx_id */
+		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+		       get_job_rcvoxid(phba, cmdiocb));
+	} else {
+		icmd = &elsiocb->iocb;
+		cmd = &cmdiocb->iocb;
+		icmd->ulpContext = cmd->ulpContext; /* Xri / rx_id */
+		icmd->unsli3.rcvsli3.ox_id = cmd->unsli3.rcvsli3.ox_id;
+	}
+
+	pcmd = elsiocb->cmd_dmabuf->virt;
+	memset(pcmd, 0, cmdsize);
+
+	edc_rsp = (struct fc_els_edc_resp *)pcmd;
+	edc_rsp->acc_hdr.la_cmd = ELS_LS_ACC;
+	edc_rsp->desc_list_len = cpu_to_be32(sizeof(struct fc_els_lsri_desc) +
+						cgn_desc_size + lft_desc_size);
+	edc_rsp->lsri.desc_tag = cpu_to_be32(ELS_DTAG_LS_REQ_INFO);
+	edc_rsp->lsri.desc_len = cpu_to_be32(
+		FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_els_lsri_desc));
+	edc_rsp->lsri.rqst_w0.cmd = ELS_EDC;
+	tlv = edc_rsp->desc;
+	lpfc_format_edc_cgn_desc(phba, tlv);
+	tlv = fc_tlv_next_desc(tlv);
+	if (lft_desc_size)
+		lpfc_format_edc_lft_desc(phba, tlv);
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
+			      "Issue EDC ACC:      did:x%x flg:x%x refcnt %d",
+			      ndlp->nlp_DID, ndlp->nlp_flag,
+			      kref_read(&ndlp->kref));
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+
+	phba->fc_stat.elsXmitACC++;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+
+	/* Xmit ELS ACC response tag <ulpIoTag> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0152 Xmit EDC ACC response Status: x%x, IoTag: x%x, "
+			 "XRI: x%x, DID: x%x, nlp_flag: x%x nlp_state: x%x "
+			 "RPI: x%x, fc_flag x%x\n",
+			 rc, elsiocb->iotag, elsiocb->sli4_xritag,
+			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
+			 ndlp->nlp_rpi, vport->fc_flag);
+
+	return 0;
+}
+
+/**
+ * lpfc_els_rsp_adisc_acc - Prepare and issue acc response to adisc iocb cmd
+ * @vport: pointer to a virtual N_Port data structure.
+ * @oldiocb: pointer to the original lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine prepares and issues an Accept (ACC) response to Address
+ * Discover (ADISC) ELS command. It simply prepares the payload of the IOCB
+ * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the ADISC Accept response
+ * ELS IOCB command.
+ *
+ * Return code
+ *   0 - Successfully issued acc adisc response
+ *   1 - Failed to issue adisc acc response
+ **/
+int
+lpfc_els_rsp_adisc_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
+		       struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	ADISC *ap;
+	IOCB_t *icmd, *oldcmd;
+	union lpfc_wqe128 *wqe;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	uint16_t cmdsize;
+	int rc;
+	u32 ulp_context;
+
+	cmdsize = sizeof(uint32_t) + sizeof(ADISC);
+	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_ACC);
+	if (!elsiocb)
+		return 1;
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		/* XRI / rx_id */
+		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
+		       get_job_ulpcontext(phba, oldiocb));
+		ulp_context = get_job_ulpcontext(phba, elsiocb);
+		/* oxid */
+		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+		       get_job_rcvoxid(phba, oldiocb));
+	} else {
+		icmd = &elsiocb->iocb;
+		oldcmd = &oldiocb->iocb;
+		icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
+		ulp_context = elsiocb->iocb.ulpContext;
+		icmd->unsli3.rcvsli3.ox_id =
+			oldcmd->unsli3.rcvsli3.ox_id;
+	}
+
+	/* Xmit ADISC ACC response tag <ulpIoTag> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0130 Xmit ADISC ACC response iotag x%x xri: "
+			 "x%x, did x%x, nlp_flag x%x, nlp_state x%x rpi x%x\n",
+			 elsiocb->iotag, ulp_context,
+			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
+			 ndlp->nlp_rpi);
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+
+	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
+	pcmd += sizeof(uint32_t);
+
+	ap = (ADISC *) (pcmd);
+	ap->hardAL_PA = phba->fc_pref_ALPA;
+	memcpy(&ap->portName, &vport->fc_portname, sizeof(struct lpfc_name));
+	memcpy(&ap->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
+	ap->DID = be32_to_cpu(vport->fc_myDID);
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
+		      "Issue ACC ADISC: did:x%x flg:x%x refcnt %d",
+		      ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
+
+	phba->fc_stat.elsXmitACC++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+
+	return 0;
+}
+
+/**
+ * lpfc_els_rsp_prli_acc - Prepare and issue acc response to prli iocb cmd
+ * @vport: pointer to a virtual N_Port data structure.
+ * @oldiocb: pointer to the original lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine prepares and issues an Accept (ACC) response to Process
+ * Login (PRLI) ELS command. It simply prepares the payload of the IOCB
+ * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the PRLI Accept response
+ * ELS IOCB command.
+ *
+ * Return code
+ *   0 - Successfully issued acc prli response
+ *   1 - Failed to issue acc prli response
+ **/
+int
+lpfc_els_rsp_prli_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
+		      struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	PRLI *npr;
+	struct lpfc_nvme_prli *npr_nvme;
+	lpfc_vpd_t *vpd;
+	IOCB_t *icmd;
+	IOCB_t *oldcmd;
+	union lpfc_wqe128 *wqe;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	uint16_t cmdsize;
+	uint32_t prli_fc4_req, *req_payload;
+	struct lpfc_dmabuf *req_buf;
+	int rc;
+	u32 elsrspcmd, ulp_context;
+
+	/* Need the incoming PRLI payload to determine if the ACC is for an
+	 * FC4 or NVME PRLI type.  The PRLI type is at word 1.
+	 */
+	req_buf = oldiocb->cmd_dmabuf;
+	req_payload = (((uint32_t *)req_buf->virt) + 1);
+
+	/* PRLI type payload is at byte 3 for FCP or NVME. */
+	prli_fc4_req = be32_to_cpu(*req_payload);
+	prli_fc4_req = (prli_fc4_req >> 24) & 0xff;
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "6127 PRLI_ACC:  Req Type x%x, Word1 x%08x\n",
+			 prli_fc4_req, *((uint32_t *)req_payload));
+
+	if (prli_fc4_req == PRLI_FCP_TYPE) {
+		cmdsize = sizeof(uint32_t) + sizeof(PRLI);
+		elsrspcmd = (ELS_CMD_ACC | (ELS_CMD_PRLI & ~ELS_RSP_MASK));
+	} else if (prli_fc4_req == PRLI_NVME_TYPE) {
+		cmdsize = sizeof(uint32_t) + sizeof(struct lpfc_nvme_prli);
+		elsrspcmd = (ELS_CMD_ACC | (ELS_CMD_NVMEPRLI & ~ELS_RSP_MASK));
+	} else {
+		return 1;
+	}
+
+	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
+				     ndlp->nlp_DID, elsrspcmd);
+	if (!elsiocb)
+		return 1;
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
+		       get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
+		ulp_context = get_job_ulpcontext(phba, elsiocb);
+		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+		       get_job_rcvoxid(phba, oldiocb));
+	} else {
+		icmd = &elsiocb->iocb;
+		oldcmd = &oldiocb->iocb;
+		icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
+		ulp_context = elsiocb->iocb.ulpContext;
+		icmd->unsli3.rcvsli3.ox_id =
+			oldcmd->unsli3.rcvsli3.ox_id;
+	}
+
+	/* Xmit PRLI ACC response tag <ulpIoTag> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0131 Xmit PRLI ACC response tag x%x xri x%x, "
+			 "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x\n",
+			 elsiocb->iotag, ulp_context,
+			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
+			 ndlp->nlp_rpi);
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+	memset(pcmd, 0, cmdsize);
+
+	*((uint32_t *)(pcmd)) = elsrspcmd;
+	pcmd += sizeof(uint32_t);
+
+	/* For PRLI, remainder of payload is PRLI parameter page */
+	vpd = &phba->vpd;
+
+	if (prli_fc4_req == PRLI_FCP_TYPE) {
+		/*
+		 * If the remote port is a target and our firmware version
+		 * is 3.20 or later, set the following bits for FC-TAPE
+		 * support.
+		 */
+		npr = (PRLI *) pcmd;
+		if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
+		    (vpd->rev.feaLevelHigh >= 0x02)) {
+			npr->ConfmComplAllowed = 1;
+			npr->Retry = 1;
+			npr->TaskRetryIdReq = 1;
+		}
+		npr->acceptRspCode = PRLI_REQ_EXECUTED;
+		npr->estabImagePair = 1;
+		npr->readXferRdyDis = 1;
+		npr->ConfmComplAllowed = 1;
+		npr->prliType = PRLI_FCP_TYPE;
+		npr->initiatorFunc = 1;
+	} else if (prli_fc4_req == PRLI_NVME_TYPE) {
+		/* Respond with an NVME PRLI Type */
+		npr_nvme = (struct lpfc_nvme_prli *) pcmd;
+		bf_set(prli_type_code, npr_nvme, PRLI_NVME_TYPE);
+		bf_set(prli_estabImagePair, npr_nvme, 0);  /* Should be 0 */
+		bf_set(prli_acc_rsp_code, npr_nvme, PRLI_REQ_EXECUTED);
+		if (phba->nvmet_support) {
+			bf_set(prli_tgt, npr_nvme, 1);
+			bf_set(prli_disc, npr_nvme, 1);
+			if (phba->cfg_nvme_enable_fb) {
+				bf_set(prli_fba, npr_nvme, 1);
+
+				/* TBD.  Target mode needs to post buffers
+				 * that support the configured first burst
+				 * byte size.
+				 */
+				bf_set(prli_fb_sz, npr_nvme,
+				       phba->cfg_nvmet_fb_size);
+			}
+		} else {
+			bf_set(prli_init, npr_nvme, 1);
+		}
+
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
+				 "6015 NVME issue PRLI ACC word1 x%08x "
+				 "word4 x%08x word5 x%08x flag x%x, "
+				 "fcp_info x%x nlp_type x%x\n",
+				 npr_nvme->word1, npr_nvme->word4,
+				 npr_nvme->word5, ndlp->nlp_flag,
+				 ndlp->nlp_fcp_info, ndlp->nlp_type);
+		npr_nvme->word1 = cpu_to_be32(npr_nvme->word1);
+		npr_nvme->word4 = cpu_to_be32(npr_nvme->word4);
+		npr_nvme->word5 = cpu_to_be32(npr_nvme->word5);
+	} else
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+				 "6128 Unknown FC_TYPE x%x x%x ndlp x%06x\n",
+				 prli_fc4_req, ndlp->nlp_fc4_type,
+				 ndlp->nlp_DID);
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
+		      "Issue ACC PRLI:  did:x%x flg:x%x",
+		      ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
+
+	phba->fc_stat.elsXmitACC++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+	elsiocb->ndlp =  lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+
+	return 0;
+}
+
+/**
+ * lpfc_els_rsp_rnid_acc - Issue rnid acc response iocb command
+ * @vport: pointer to a virtual N_Port data structure.
+ * @format: rnid command format.
+ * @oldiocb: pointer to the original lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine issues a Request Node Identification Data (RNID) Accept
+ * (ACC) response. It constructs the RNID ACC response command according to
+ * the proper @format and then calls the lpfc_sli_issue_iocb() routine to
+ * issue the response.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function.
+ *
+ * Return code
+ *   0 - Successfully issued acc rnid response
+ *   1 - Failed to issue acc rnid response
+ **/
+static int
+lpfc_els_rsp_rnid_acc(struct lpfc_vport *vport, uint8_t format,
+		      struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	RNID *rn;
+	IOCB_t *icmd, *oldcmd;
+	union lpfc_wqe128 *wqe;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	uint16_t cmdsize;
+	int rc;
+	u32 ulp_context;
+
+	cmdsize = sizeof(uint32_t) + sizeof(uint32_t)
+					+ (2 * sizeof(struct lpfc_name));
+	if (format)
+		cmdsize += sizeof(RNID_TOP_DISC);
+
+	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_ACC);
+	if (!elsiocb)
+		return 1;
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
+		       get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
+		ulp_context = get_job_ulpcontext(phba, elsiocb);
+		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+		       get_job_rcvoxid(phba, oldiocb));
+	} else {
+		icmd = &elsiocb->iocb;
+		oldcmd = &oldiocb->iocb;
+		icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
+		ulp_context = elsiocb->iocb.ulpContext;
+		icmd->unsli3.rcvsli3.ox_id =
+			oldcmd->unsli3.rcvsli3.ox_id;
+	}
+
+	/* Xmit RNID ACC response tag <ulpIoTag> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0132 Xmit RNID ACC response tag x%x xri x%x\n",
+			 elsiocb->iotag, ulp_context);
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
+	pcmd += sizeof(uint32_t);
+
+	memset(pcmd, 0, sizeof(RNID));
+	rn = (RNID *) (pcmd);
+	rn->Format = format;
+	rn->CommonLen = (2 * sizeof(struct lpfc_name));
+	memcpy(&rn->portName, &vport->fc_portname, sizeof(struct lpfc_name));
+	memcpy(&rn->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
+	switch (format) {
+	case 0:
+		rn->SpecificLen = 0;
+		break;
+	case RNID_TOPOLOGY_DISC:
+		rn->SpecificLen = sizeof(RNID_TOP_DISC);
+		memcpy(&rn->un.topologyDisc.portName,
+		       &vport->fc_portname, sizeof(struct lpfc_name));
+		rn->un.topologyDisc.unitType = RNID_HBA;
+		rn->un.topologyDisc.physPort = 0;
+		rn->un.topologyDisc.attachedNodes = 0;
+		break;
+	default:
+		rn->CommonLen = 0;
+		rn->SpecificLen = 0;
+		break;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
+		      "Issue ACC RNID:  did:x%x flg:x%x refcnt %d",
+		      ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
+
+	phba->fc_stat.elsXmitACC++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+
+	return 0;
+}
+
+/**
+ * lpfc_els_clear_rrq - Clear the rq that this rrq describes.
+ * @vport: pointer to a virtual N_Port data structure.
+ * @iocb: pointer to the lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * Return
+ **/
+static void
+lpfc_els_clear_rrq(struct lpfc_vport *vport,
+		   struct lpfc_iocbq *iocb, struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	uint8_t *pcmd;
+	struct RRQ *rrq;
+	uint16_t rxid;
+	uint16_t xri;
+	struct lpfc_node_rrq *prrq;
+
+
+	pcmd = (uint8_t *)iocb->cmd_dmabuf->virt;
+	pcmd += sizeof(uint32_t);
+	rrq = (struct RRQ *)pcmd;
+	rrq->rrq_exchg = be32_to_cpu(rrq->rrq_exchg);
+	rxid = bf_get(rrq_rxid, rrq);
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			"2883 Clear RRQ for SID:x%x OXID:x%x RXID:x%x"
+			" x%x x%x\n",
+			be32_to_cpu(bf_get(rrq_did, rrq)),
+			bf_get(rrq_oxid, rrq),
+			rxid,
+			get_wqe_reqtag(iocb),
+			get_job_ulpcontext(phba, iocb));
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
+		"Clear RRQ:  did:x%x flg:x%x exchg:x%.08x",
+		ndlp->nlp_DID, ndlp->nlp_flag, rrq->rrq_exchg);
+	if (vport->fc_myDID == be32_to_cpu(bf_get(rrq_did, rrq)))
+		xri = bf_get(rrq_oxid, rrq);
+	else
+		xri = rxid;
+	prrq = lpfc_get_active_rrq(vport, xri, ndlp->nlp_DID);
+	if (prrq)
+		lpfc_clr_rrq_active(phba, xri, prrq);
+	return;
+}
+
+/**
+ * lpfc_els_rsp_echo_acc - Issue echo acc response
+ * @vport: pointer to a virtual N_Port data structure.
+ * @data: pointer to echo data to return in the accept.
+ * @oldiocb: pointer to the original lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * Return code
+ *   0 - Successfully issued acc echo response
+ *   1 - Failed to issue acc echo response
+ **/
+static int
+lpfc_els_rsp_echo_acc(struct lpfc_vport *vport, uint8_t *data,
+		      struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	IOCB_t *icmd, *oldcmd;
+	union lpfc_wqe128 *wqe;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	uint16_t cmdsize;
+	int rc;
+	u32 ulp_context;
+
+	if (phba->sli_rev == LPFC_SLI_REV4)
+		cmdsize = oldiocb->wcqe_cmpl.total_data_placed;
+	else
+		cmdsize = oldiocb->iocb.unsli3.rcvsli3.acc_len;
+
+	/* The accumulated length can exceed the BPL_SIZE.  For
+	 * now, use this as the limit
+	 */
+	if (cmdsize > LPFC_BPL_SIZE)
+		cmdsize = LPFC_BPL_SIZE;
+	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_ACC);
+	if (!elsiocb)
+		return 1;
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
+		       get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
+		ulp_context = get_job_ulpcontext(phba, elsiocb);
+		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+		       get_job_rcvoxid(phba, oldiocb));
+	} else {
+		icmd = &elsiocb->iocb;
+		oldcmd = &oldiocb->iocb;
+		icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
+		ulp_context = elsiocb->iocb.ulpContext;
+		icmd->unsli3.rcvsli3.ox_id =
+			oldcmd->unsli3.rcvsli3.ox_id;
+	}
+
+	/* Xmit ECHO ACC response tag <ulpIoTag> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "2876 Xmit ECHO ACC response tag x%x xri x%x\n",
+			 elsiocb->iotag, ulp_context);
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
+	pcmd += sizeof(uint32_t);
+	memcpy(pcmd, data, cmdsize - sizeof(uint32_t));
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
+		      "Issue ACC ECHO:  did:x%x flg:x%x refcnt %d",
+		      ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
+
+	phba->fc_stat.elsXmitACC++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+	elsiocb->ndlp =  lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+
+	return 0;
+}
+
+/**
+ * lpfc_els_disc_adisc - Issue remaining adisc iocbs to npr nodes of a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine issues Address Discover (ADISC) ELS commands to those
+ * N_Ports which are in node port recovery state and ADISC has not been issued
+ * for the @vport. Each time an ELS ADISC IOCB is issued by invoking the
+ * lpfc_issue_els_adisc() routine, the per @vport number of discover count
+ * (num_disc_nodes) shall be incremented. If the num_disc_nodes reaches a
+ * pre-configured threshold (cfg_discovery_threads), the @vport fc_flag will
+ * be marked with FC_NLP_MORE bit and the process of issuing remaining ADISC
+ * IOCBs quit for later pick up. On the other hand, after walking through
+ * all the ndlps with the @vport and there is none ADISC IOCB issued, the
+ * @vport fc_flag shall be cleared with FC_NLP_MORE bit indicating there is
+ * no more ADISC need to be sent.
+ *
+ * Return code
+ *    The number of N_Ports with adisc issued.
+ **/
+int
+lpfc_els_disc_adisc(struct lpfc_vport *vport)
+{
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_nodelist *ndlp, *next_ndlp;
+	int sentadisc = 0;
+
+	/* go thru NPR nodes and issue any remaining ELS ADISCs */
+	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
+
+		if (ndlp->nlp_state != NLP_STE_NPR_NODE ||
+		    !(ndlp->nlp_flag & NLP_NPR_ADISC))
+			continue;
+
+		spin_lock_irq(&ndlp->lock);
+		ndlp->nlp_flag &= ~NLP_NPR_ADISC;
+		spin_unlock_irq(&ndlp->lock);
+
+		if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
+			/* This node was marked for ADISC but was not picked
+			 * for discovery. This is possible if the node was
+			 * missing in gidft response.
+			 *
+			 * At time of marking node for ADISC, we skipped unreg
+			 * from backend
+			 */
+			lpfc_nlp_unreg_node(vport, ndlp);
+			lpfc_unreg_rpi(vport, ndlp);
+			continue;
+		}
+
+		ndlp->nlp_prev_state = ndlp->nlp_state;
+		lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
+		lpfc_issue_els_adisc(vport, ndlp, 0);
+		sentadisc++;
+		vport->num_disc_nodes++;
+		if (vport->num_disc_nodes >=
+				vport->cfg_discovery_threads) {
+			spin_lock_irq(shost->host_lock);
+			vport->fc_flag |= FC_NLP_MORE;
+			spin_unlock_irq(shost->host_lock);
+			break;
+		}
+
+	}
+	if (sentadisc == 0) {
+		spin_lock_irq(shost->host_lock);
+		vport->fc_flag &= ~FC_NLP_MORE;
+		spin_unlock_irq(shost->host_lock);
+	}
+	return sentadisc;
+}
+
+/**
+ * lpfc_els_disc_plogi - Issue plogi for all npr nodes of a vport before adisc
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine issues Port Login (PLOGI) ELS commands to all the N_Ports
+ * which are in node port recovery state, with a @vport. Each time an ELS
+ * ADISC PLOGI IOCB is issued by invoking the lpfc_issue_els_plogi() routine,
+ * the per @vport number of discover count (num_disc_nodes) shall be
+ * incremented. If the num_disc_nodes reaches a pre-configured threshold
+ * (cfg_discovery_threads), the @vport fc_flag will be marked with FC_NLP_MORE
+ * bit set and quit the process of issuing remaining ADISC PLOGIN IOCBs for
+ * later pick up. On the other hand, after walking through all the ndlps with
+ * the @vport and there is none ADISC PLOGI IOCB issued, the @vport fc_flag
+ * shall be cleared with the FC_NLP_MORE bit indicating there is no more ADISC
+ * PLOGI need to be sent.
+ *
+ * Return code
+ *   The number of N_Ports with plogi issued.
+ **/
+int
+lpfc_els_disc_plogi(struct lpfc_vport *vport)
+{
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_nodelist *ndlp, *next_ndlp;
+	int sentplogi = 0;
+
+	/* go thru NPR nodes and issue any remaining ELS PLOGIs */
+	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
+		if (ndlp->nlp_state == NLP_STE_NPR_NODE &&
+				(ndlp->nlp_flag & NLP_NPR_2B_DISC) != 0 &&
+				(ndlp->nlp_flag & NLP_DELAY_TMO) == 0 &&
+				(ndlp->nlp_flag & NLP_NPR_ADISC) == 0) {
+			ndlp->nlp_prev_state = ndlp->nlp_state;
+			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
+			lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
+			sentplogi++;
+			vport->num_disc_nodes++;
+			if (vport->num_disc_nodes >=
+					vport->cfg_discovery_threads) {
+				spin_lock_irq(shost->host_lock);
+				vport->fc_flag |= FC_NLP_MORE;
+				spin_unlock_irq(shost->host_lock);
+				break;
+			}
+		}
+	}
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+			 "6452 Discover PLOGI %d flag x%x\n",
+			 sentplogi, vport->fc_flag);
+
+	if (sentplogi) {
+		lpfc_set_disctmo(vport);
+	}
+	else {
+		spin_lock_irq(shost->host_lock);
+		vport->fc_flag &= ~FC_NLP_MORE;
+		spin_unlock_irq(shost->host_lock);
+	}
+	return sentplogi;
+}
+
+static uint32_t
+lpfc_rdp_res_link_service(struct fc_rdp_link_service_desc *desc,
+		uint32_t word0)
+{
+
+	desc->tag = cpu_to_be32(RDP_LINK_SERVICE_DESC_TAG);
+	desc->payload.els_req = word0;
+	desc->length = cpu_to_be32(sizeof(desc->payload));
+
+	return sizeof(struct fc_rdp_link_service_desc);
+}
+
+static uint32_t
+lpfc_rdp_res_sfp_desc(struct fc_rdp_sfp_desc *desc,
+		uint8_t *page_a0, uint8_t *page_a2)
+{
+	uint16_t wavelength;
+	uint16_t temperature;
+	uint16_t rx_power;
+	uint16_t tx_bias;
+	uint16_t tx_power;
+	uint16_t vcc;
+	uint16_t flag = 0;
+	struct sff_trasnceiver_codes_byte4 *trasn_code_byte4;
+	struct sff_trasnceiver_codes_byte5 *trasn_code_byte5;
+
+	desc->tag = cpu_to_be32(RDP_SFP_DESC_TAG);
+
+	trasn_code_byte4 = (struct sff_trasnceiver_codes_byte4 *)
+			&page_a0[SSF_TRANSCEIVER_CODE_B4];
+	trasn_code_byte5 = (struct sff_trasnceiver_codes_byte5 *)
+			&page_a0[SSF_TRANSCEIVER_CODE_B5];
+
+	if ((trasn_code_byte4->fc_sw_laser) ||
+	    (trasn_code_byte5->fc_sw_laser_sl) ||
+	    (trasn_code_byte5->fc_sw_laser_sn)) {  /* check if its short WL */
+		flag |= (SFP_FLAG_PT_SWLASER << SFP_FLAG_PT_SHIFT);
+	} else if (trasn_code_byte4->fc_lw_laser) {
+		wavelength = (page_a0[SSF_WAVELENGTH_B1] << 8) |
+			page_a0[SSF_WAVELENGTH_B0];
+		if (wavelength == SFP_WAVELENGTH_LC1310)
+			flag |= SFP_FLAG_PT_LWLASER_LC1310 << SFP_FLAG_PT_SHIFT;
+		if (wavelength == SFP_WAVELENGTH_LL1550)
+			flag |= SFP_FLAG_PT_LWLASER_LL1550 << SFP_FLAG_PT_SHIFT;
+	}
+	/* check if its SFP+ */
+	flag |= ((page_a0[SSF_IDENTIFIER] == SFF_PG0_IDENT_SFP) ?
+			SFP_FLAG_CT_SFP_PLUS : SFP_FLAG_CT_UNKNOWN)
+					<< SFP_FLAG_CT_SHIFT;
+
+	/* check if its OPTICAL */
+	flag |= ((page_a0[SSF_CONNECTOR] == SFF_PG0_CONNECTOR_LC) ?
+			SFP_FLAG_IS_OPTICAL_PORT : 0)
+					<< SFP_FLAG_IS_OPTICAL_SHIFT;
+
+	temperature = (page_a2[SFF_TEMPERATURE_B1] << 8 |
+		page_a2[SFF_TEMPERATURE_B0]);
+	vcc = (page_a2[SFF_VCC_B1] << 8 |
+		page_a2[SFF_VCC_B0]);
+	tx_power = (page_a2[SFF_TXPOWER_B1] << 8 |
+		page_a2[SFF_TXPOWER_B0]);
+	tx_bias = (page_a2[SFF_TX_BIAS_CURRENT_B1] << 8 |
+		page_a2[SFF_TX_BIAS_CURRENT_B0]);
+	rx_power = (page_a2[SFF_RXPOWER_B1] << 8 |
+		page_a2[SFF_RXPOWER_B0]);
+	desc->sfp_info.temperature = cpu_to_be16(temperature);
+	desc->sfp_info.rx_power = cpu_to_be16(rx_power);
+	desc->sfp_info.tx_bias = cpu_to_be16(tx_bias);
+	desc->sfp_info.tx_power = cpu_to_be16(tx_power);
+	desc->sfp_info.vcc = cpu_to_be16(vcc);
+
+	desc->sfp_info.flags = cpu_to_be16(flag);
+	desc->length = cpu_to_be32(sizeof(desc->sfp_info));
+
+	return sizeof(struct fc_rdp_sfp_desc);
+}
+
+static uint32_t
+lpfc_rdp_res_link_error(struct fc_rdp_link_error_status_desc *desc,
+		READ_LNK_VAR *stat)
+{
+	uint32_t type;
+
+	desc->tag = cpu_to_be32(RDP_LINK_ERROR_STATUS_DESC_TAG);
+
+	type = VN_PT_PHY_PF_PORT << VN_PT_PHY_SHIFT;
+
+	desc->info.port_type = cpu_to_be32(type);
+
+	desc->info.link_status.link_failure_cnt =
+		cpu_to_be32(stat->linkFailureCnt);
+	desc->info.link_status.loss_of_synch_cnt =
+		cpu_to_be32(stat->lossSyncCnt);
+	desc->info.link_status.loss_of_signal_cnt =
+		cpu_to_be32(stat->lossSignalCnt);
+	desc->info.link_status.primitive_seq_proto_err =
+		cpu_to_be32(stat->primSeqErrCnt);
+	desc->info.link_status.invalid_trans_word =
+		cpu_to_be32(stat->invalidXmitWord);
+	desc->info.link_status.invalid_crc_cnt = cpu_to_be32(stat->crcCnt);
+
+	desc->length = cpu_to_be32(sizeof(desc->info));
+
+	return sizeof(struct fc_rdp_link_error_status_desc);
+}
+
+static uint32_t
+lpfc_rdp_res_bbc_desc(struct fc_rdp_bbc_desc *desc, READ_LNK_VAR *stat,
+		      struct lpfc_vport *vport)
+{
+	uint32_t bbCredit;
+
+	desc->tag = cpu_to_be32(RDP_BBC_DESC_TAG);
+
+	bbCredit = vport->fc_sparam.cmn.bbCreditLsb |
+			(vport->fc_sparam.cmn.bbCreditMsb << 8);
+	desc->bbc_info.port_bbc = cpu_to_be32(bbCredit);
+	if (vport->phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
+		bbCredit = vport->phba->fc_fabparam.cmn.bbCreditLsb |
+			(vport->phba->fc_fabparam.cmn.bbCreditMsb << 8);
+		desc->bbc_info.attached_port_bbc = cpu_to_be32(bbCredit);
+	} else {
+		desc->bbc_info.attached_port_bbc = 0;
+	}
+
+	desc->bbc_info.rtt = 0;
+	desc->length = cpu_to_be32(sizeof(desc->bbc_info));
+
+	return sizeof(struct fc_rdp_bbc_desc);
+}
+
+static uint32_t
+lpfc_rdp_res_oed_temp_desc(struct lpfc_hba *phba,
+			   struct fc_rdp_oed_sfp_desc *desc, uint8_t *page_a2)
+{
+	uint32_t flags = 0;
+
+	desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
+
+	desc->oed_info.hi_alarm = page_a2[SSF_TEMP_HIGH_ALARM];
+	desc->oed_info.lo_alarm = page_a2[SSF_TEMP_LOW_ALARM];
+	desc->oed_info.hi_warning = page_a2[SSF_TEMP_HIGH_WARNING];
+	desc->oed_info.lo_warning = page_a2[SSF_TEMP_LOW_WARNING];
+
+	if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TEMPERATURE)
+		flags |= RDP_OET_HIGH_ALARM;
+	if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TEMPERATURE)
+		flags |= RDP_OET_LOW_ALARM;
+	if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TEMPERATURE)
+		flags |= RDP_OET_HIGH_WARNING;
+	if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TEMPERATURE)
+		flags |= RDP_OET_LOW_WARNING;
+
+	flags |= ((0xf & RDP_OED_TEMPERATURE) << RDP_OED_TYPE_SHIFT);
+	desc->oed_info.function_flags = cpu_to_be32(flags);
+	desc->length = cpu_to_be32(sizeof(desc->oed_info));
+	return sizeof(struct fc_rdp_oed_sfp_desc);
+}
+
+static uint32_t
+lpfc_rdp_res_oed_voltage_desc(struct lpfc_hba *phba,
+			      struct fc_rdp_oed_sfp_desc *desc,
+			      uint8_t *page_a2)
+{
+	uint32_t flags = 0;
+
+	desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
+
+	desc->oed_info.hi_alarm = page_a2[SSF_VOLTAGE_HIGH_ALARM];
+	desc->oed_info.lo_alarm = page_a2[SSF_VOLTAGE_LOW_ALARM];
+	desc->oed_info.hi_warning = page_a2[SSF_VOLTAGE_HIGH_WARNING];
+	desc->oed_info.lo_warning = page_a2[SSF_VOLTAGE_LOW_WARNING];
+
+	if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_VOLTAGE)
+		flags |= RDP_OET_HIGH_ALARM;
+	if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_VOLTAGE)
+		flags |= RDP_OET_LOW_ALARM;
+	if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_VOLTAGE)
+		flags |= RDP_OET_HIGH_WARNING;
+	if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_VOLTAGE)
+		flags |= RDP_OET_LOW_WARNING;
+
+	flags |= ((0xf & RDP_OED_VOLTAGE) << RDP_OED_TYPE_SHIFT);
+	desc->oed_info.function_flags = cpu_to_be32(flags);
+	desc->length = cpu_to_be32(sizeof(desc->oed_info));
+	return sizeof(struct fc_rdp_oed_sfp_desc);
+}
+
+static uint32_t
+lpfc_rdp_res_oed_txbias_desc(struct lpfc_hba *phba,
+			     struct fc_rdp_oed_sfp_desc *desc,
+			     uint8_t *page_a2)
+{
+	uint32_t flags = 0;
+
+	desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
+
+	desc->oed_info.hi_alarm = page_a2[SSF_BIAS_HIGH_ALARM];
+	desc->oed_info.lo_alarm = page_a2[SSF_BIAS_LOW_ALARM];
+	desc->oed_info.hi_warning = page_a2[SSF_BIAS_HIGH_WARNING];
+	desc->oed_info.lo_warning = page_a2[SSF_BIAS_LOW_WARNING];
+
+	if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TXBIAS)
+		flags |= RDP_OET_HIGH_ALARM;
+	if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TXBIAS)
+		flags |= RDP_OET_LOW_ALARM;
+	if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TXBIAS)
+		flags |= RDP_OET_HIGH_WARNING;
+	if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TXBIAS)
+		flags |= RDP_OET_LOW_WARNING;
+
+	flags |= ((0xf & RDP_OED_TXBIAS) << RDP_OED_TYPE_SHIFT);
+	desc->oed_info.function_flags = cpu_to_be32(flags);
+	desc->length = cpu_to_be32(sizeof(desc->oed_info));
+	return sizeof(struct fc_rdp_oed_sfp_desc);
+}
+
+static uint32_t
+lpfc_rdp_res_oed_txpower_desc(struct lpfc_hba *phba,
+			      struct fc_rdp_oed_sfp_desc *desc,
+			      uint8_t *page_a2)
+{
+	uint32_t flags = 0;
+
+	desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
+
+	desc->oed_info.hi_alarm = page_a2[SSF_TXPOWER_HIGH_ALARM];
+	desc->oed_info.lo_alarm = page_a2[SSF_TXPOWER_LOW_ALARM];
+	desc->oed_info.hi_warning = page_a2[SSF_TXPOWER_HIGH_WARNING];
+	desc->oed_info.lo_warning = page_a2[SSF_TXPOWER_LOW_WARNING];
+
+	if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TXPOWER)
+		flags |= RDP_OET_HIGH_ALARM;
+	if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TXPOWER)
+		flags |= RDP_OET_LOW_ALARM;
+	if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TXPOWER)
+		flags |= RDP_OET_HIGH_WARNING;
+	if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TXPOWER)
+		flags |= RDP_OET_LOW_WARNING;
+
+	flags |= ((0xf & RDP_OED_TXPOWER) << RDP_OED_TYPE_SHIFT);
+	desc->oed_info.function_flags = cpu_to_be32(flags);
+	desc->length = cpu_to_be32(sizeof(desc->oed_info));
+	return sizeof(struct fc_rdp_oed_sfp_desc);
+}
+
+
+static uint32_t
+lpfc_rdp_res_oed_rxpower_desc(struct lpfc_hba *phba,
+			      struct fc_rdp_oed_sfp_desc *desc,
+			      uint8_t *page_a2)
+{
+	uint32_t flags = 0;
+
+	desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
+
+	desc->oed_info.hi_alarm = page_a2[SSF_RXPOWER_HIGH_ALARM];
+	desc->oed_info.lo_alarm = page_a2[SSF_RXPOWER_LOW_ALARM];
+	desc->oed_info.hi_warning = page_a2[SSF_RXPOWER_HIGH_WARNING];
+	desc->oed_info.lo_warning = page_a2[SSF_RXPOWER_LOW_WARNING];
+
+	if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_RXPOWER)
+		flags |= RDP_OET_HIGH_ALARM;
+	if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_RXPOWER)
+		flags |= RDP_OET_LOW_ALARM;
+	if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_RXPOWER)
+		flags |= RDP_OET_HIGH_WARNING;
+	if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_RXPOWER)
+		flags |= RDP_OET_LOW_WARNING;
+
+	flags |= ((0xf & RDP_OED_RXPOWER) << RDP_OED_TYPE_SHIFT);
+	desc->oed_info.function_flags = cpu_to_be32(flags);
+	desc->length = cpu_to_be32(sizeof(desc->oed_info));
+	return sizeof(struct fc_rdp_oed_sfp_desc);
+}
+
+static uint32_t
+lpfc_rdp_res_opd_desc(struct fc_rdp_opd_sfp_desc *desc,
+		      uint8_t *page_a0, struct lpfc_vport *vport)
+{
+	desc->tag = cpu_to_be32(RDP_OPD_DESC_TAG);
+	memcpy(desc->opd_info.vendor_name, &page_a0[SSF_VENDOR_NAME], 16);
+	memcpy(desc->opd_info.model_number, &page_a0[SSF_VENDOR_PN], 16);
+	memcpy(desc->opd_info.serial_number, &page_a0[SSF_VENDOR_SN], 16);
+	memcpy(desc->opd_info.revision, &page_a0[SSF_VENDOR_REV], 4);
+	memcpy(desc->opd_info.date, &page_a0[SSF_DATE_CODE], 8);
+	desc->length = cpu_to_be32(sizeof(desc->opd_info));
+	return sizeof(struct fc_rdp_opd_sfp_desc);
+}
+
+static uint32_t
+lpfc_rdp_res_fec_desc(struct fc_fec_rdp_desc *desc, READ_LNK_VAR *stat)
+{
+	if (bf_get(lpfc_read_link_stat_gec2, stat) == 0)
+		return 0;
+	desc->tag = cpu_to_be32(RDP_FEC_DESC_TAG);
+
+	desc->info.CorrectedBlocks =
+		cpu_to_be32(stat->fecCorrBlkCount);
+	desc->info.UncorrectableBlocks =
+		cpu_to_be32(stat->fecUncorrBlkCount);
+
+	desc->length = cpu_to_be32(sizeof(desc->info));
+
+	return sizeof(struct fc_fec_rdp_desc);
+}
+
+static uint32_t
+lpfc_rdp_res_speed(struct fc_rdp_port_speed_desc *desc, struct lpfc_hba *phba)
+{
+	uint16_t rdp_cap = 0;
+	uint16_t rdp_speed;
+
+	desc->tag = cpu_to_be32(RDP_PORT_SPEED_DESC_TAG);
+
+	switch (phba->fc_linkspeed) {
+	case LPFC_LINK_SPEED_1GHZ:
+		rdp_speed = RDP_PS_1GB;
+		break;
+	case LPFC_LINK_SPEED_2GHZ:
+		rdp_speed = RDP_PS_2GB;
+		break;
+	case LPFC_LINK_SPEED_4GHZ:
+		rdp_speed = RDP_PS_4GB;
+		break;
+	case LPFC_LINK_SPEED_8GHZ:
+		rdp_speed = RDP_PS_8GB;
+		break;
+	case LPFC_LINK_SPEED_10GHZ:
+		rdp_speed = RDP_PS_10GB;
+		break;
+	case LPFC_LINK_SPEED_16GHZ:
+		rdp_speed = RDP_PS_16GB;
+		break;
+	case LPFC_LINK_SPEED_32GHZ:
+		rdp_speed = RDP_PS_32GB;
+		break;
+	case LPFC_LINK_SPEED_64GHZ:
+		rdp_speed = RDP_PS_64GB;
+		break;
+	case LPFC_LINK_SPEED_128GHZ:
+		rdp_speed = RDP_PS_128GB;
+		break;
+	case LPFC_LINK_SPEED_256GHZ:
+		rdp_speed = RDP_PS_256GB;
+		break;
+	default:
+		rdp_speed = RDP_PS_UNKNOWN;
+		break;
+	}
+
+	desc->info.port_speed.speed = cpu_to_be16(rdp_speed);
+
+	if (phba->lmt & LMT_256Gb)
+		rdp_cap |= RDP_PS_256GB;
+	if (phba->lmt & LMT_128Gb)
+		rdp_cap |= RDP_PS_128GB;
+	if (phba->lmt & LMT_64Gb)
+		rdp_cap |= RDP_PS_64GB;
+	if (phba->lmt & LMT_32Gb)
+		rdp_cap |= RDP_PS_32GB;
+	if (phba->lmt & LMT_16Gb)
+		rdp_cap |= RDP_PS_16GB;
+	if (phba->lmt & LMT_10Gb)
+		rdp_cap |= RDP_PS_10GB;
+	if (phba->lmt & LMT_8Gb)
+		rdp_cap |= RDP_PS_8GB;
+	if (phba->lmt & LMT_4Gb)
+		rdp_cap |= RDP_PS_4GB;
+	if (phba->lmt & LMT_2Gb)
+		rdp_cap |= RDP_PS_2GB;
+	if (phba->lmt & LMT_1Gb)
+		rdp_cap |= RDP_PS_1GB;
+
+	if (rdp_cap == 0)
+		rdp_cap = RDP_CAP_UNKNOWN;
+	if (phba->cfg_link_speed != LPFC_USER_LINK_SPEED_AUTO)
+		rdp_cap |= RDP_CAP_USER_CONFIGURED;
+
+	desc->info.port_speed.capabilities = cpu_to_be16(rdp_cap);
+	desc->length = cpu_to_be32(sizeof(desc->info));
+	return sizeof(struct fc_rdp_port_speed_desc);
+}
+
+static uint32_t
+lpfc_rdp_res_diag_port_names(struct fc_rdp_port_name_desc *desc,
+		struct lpfc_vport *vport)
+{
+
+	desc->tag = cpu_to_be32(RDP_PORT_NAMES_DESC_TAG);
+
+	memcpy(desc->port_names.wwnn, &vport->fc_nodename,
+			sizeof(desc->port_names.wwnn));
+
+	memcpy(desc->port_names.wwpn, &vport->fc_portname,
+			sizeof(desc->port_names.wwpn));
+
+	desc->length = cpu_to_be32(sizeof(desc->port_names));
+	return sizeof(struct fc_rdp_port_name_desc);
+}
+
+static uint32_t
+lpfc_rdp_res_attach_port_names(struct fc_rdp_port_name_desc *desc,
+		struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
+{
+
+	desc->tag = cpu_to_be32(RDP_PORT_NAMES_DESC_TAG);
+	if (vport->fc_flag & FC_FABRIC) {
+		memcpy(desc->port_names.wwnn, &vport->fabric_nodename,
+		       sizeof(desc->port_names.wwnn));
+
+		memcpy(desc->port_names.wwpn, &vport->fabric_portname,
+		       sizeof(desc->port_names.wwpn));
+	} else {  /* Point to Point */
+		memcpy(desc->port_names.wwnn, &ndlp->nlp_nodename,
+		       sizeof(desc->port_names.wwnn));
+
+		memcpy(desc->port_names.wwpn, &ndlp->nlp_portname,
+		       sizeof(desc->port_names.wwpn));
+	}
+
+	desc->length = cpu_to_be32(sizeof(desc->port_names));
+	return sizeof(struct fc_rdp_port_name_desc);
+}
+
+static void
+lpfc_els_rdp_cmpl(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context,
+		int status)
+{
+	struct lpfc_nodelist *ndlp = rdp_context->ndlp;
+	struct lpfc_vport *vport = ndlp->vport;
+	struct lpfc_iocbq *elsiocb;
+	struct ulp_bde64 *bpl;
+	IOCB_t *icmd;
+	union lpfc_wqe128 *wqe;
+	uint8_t *pcmd;
+	struct ls_rjt *stat;
+	struct fc_rdp_res_frame *rdp_res;
+	uint32_t cmdsize, len;
+	uint16_t *flag_ptr;
+	int rc;
+	u32 ulp_context;
+
+	if (status != SUCCESS)
+		goto error;
+
+	/* This will change once we know the true size of the RDP payload */
+	cmdsize = sizeof(struct fc_rdp_res_frame);
+
+	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize,
+				lpfc_max_els_tries, rdp_context->ndlp,
+				rdp_context->ndlp->nlp_DID, ELS_CMD_ACC);
+	if (!elsiocb)
+		goto free_rdp_context;
+
+	ulp_context = get_job_ulpcontext(phba, elsiocb);
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		/* ox-id of the frame */
+		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+		       rdp_context->ox_id);
+		bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
+		       rdp_context->rx_id);
+	} else {
+		icmd = &elsiocb->iocb;
+		icmd->ulpContext = rdp_context->rx_id;
+		icmd->unsli3.rcvsli3.ox_id = rdp_context->ox_id;
+	}
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			"2171 Xmit RDP response tag x%x xri x%x, "
+			"did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x",
+			elsiocb->iotag, ulp_context,
+			ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
+			ndlp->nlp_rpi);
+	rdp_res = (struct fc_rdp_res_frame *)elsiocb->cmd_dmabuf->virt;
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+	memset(pcmd, 0, sizeof(struct fc_rdp_res_frame));
+	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
+
+	/* Update Alarm and Warning */
+	flag_ptr = (uint16_t *)(rdp_context->page_a2 + SSF_ALARM_FLAGS);
+	phba->sfp_alarm |= *flag_ptr;
+	flag_ptr = (uint16_t *)(rdp_context->page_a2 + SSF_WARNING_FLAGS);
+	phba->sfp_warning |= *flag_ptr;
+
+	/* For RDP payload */
+	len = 8;
+	len += lpfc_rdp_res_link_service((struct fc_rdp_link_service_desc *)
+					 (len + pcmd), ELS_CMD_RDP);
+
+	len += lpfc_rdp_res_sfp_desc((struct fc_rdp_sfp_desc *)(len + pcmd),
+			rdp_context->page_a0, rdp_context->page_a2);
+	len += lpfc_rdp_res_speed((struct fc_rdp_port_speed_desc *)(len + pcmd),
+				  phba);
+	len += lpfc_rdp_res_link_error((struct fc_rdp_link_error_status_desc *)
+				       (len + pcmd), &rdp_context->link_stat);
+	len += lpfc_rdp_res_diag_port_names((struct fc_rdp_port_name_desc *)
+					     (len + pcmd), vport);
+	len += lpfc_rdp_res_attach_port_names((struct fc_rdp_port_name_desc *)
+					(len + pcmd), vport, ndlp);
+	len += lpfc_rdp_res_fec_desc((struct fc_fec_rdp_desc *)(len + pcmd),
+			&rdp_context->link_stat);
+	len += lpfc_rdp_res_bbc_desc((struct fc_rdp_bbc_desc *)(len + pcmd),
+				     &rdp_context->link_stat, vport);
+	len += lpfc_rdp_res_oed_temp_desc(phba,
+				(struct fc_rdp_oed_sfp_desc *)(len + pcmd),
+				rdp_context->page_a2);
+	len += lpfc_rdp_res_oed_voltage_desc(phba,
+				(struct fc_rdp_oed_sfp_desc *)(len + pcmd),
+				rdp_context->page_a2);
+	len += lpfc_rdp_res_oed_txbias_desc(phba,
+				(struct fc_rdp_oed_sfp_desc *)(len + pcmd),
+				rdp_context->page_a2);
+	len += lpfc_rdp_res_oed_txpower_desc(phba,
+				(struct fc_rdp_oed_sfp_desc *)(len + pcmd),
+				rdp_context->page_a2);
+	len += lpfc_rdp_res_oed_rxpower_desc(phba,
+				(struct fc_rdp_oed_sfp_desc *)(len + pcmd),
+				rdp_context->page_a2);
+	len += lpfc_rdp_res_opd_desc((struct fc_rdp_opd_sfp_desc *)(len + pcmd),
+				     rdp_context->page_a0, vport);
+
+	rdp_res->length = cpu_to_be32(len - 8);
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+
+	/* Now that we know the true size of the payload, update the BPL */
+	bpl = (struct ulp_bde64 *)elsiocb->bpl_dmabuf->virt;
+	bpl->tus.f.bdeSize = len;
+	bpl->tus.f.bdeFlags = 0;
+	bpl->tus.w = le32_to_cpu(bpl->tus.w);
+
+	phba->fc_stat.elsXmitACC++;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		goto free_rdp_context;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+	}
+
+	goto free_rdp_context;
+
+error:
+	cmdsize = 2 * sizeof(uint32_t);
+	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, lpfc_max_els_tries,
+			ndlp, ndlp->nlp_DID, ELS_CMD_LS_RJT);
+	if (!elsiocb)
+		goto free_rdp_context;
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		/* ox-id of the frame */
+		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+		       rdp_context->ox_id);
+		bf_set(wqe_ctxt_tag,
+		       &wqe->xmit_els_rsp.wqe_com,
+		       rdp_context->rx_id);
+	} else {
+		icmd = &elsiocb->iocb;
+		icmd->ulpContext = rdp_context->rx_id;
+		icmd->unsli3.rcvsli3.ox_id = rdp_context->ox_id;
+	}
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+
+	*((uint32_t *) (pcmd)) = ELS_CMD_LS_RJT;
+	stat = (struct ls_rjt *)(pcmd + sizeof(uint32_t));
+	stat->un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
+
+	phba->fc_stat.elsXmitLSRJT++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		goto free_rdp_context;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+	}
+
+free_rdp_context:
+	/* This reference put is for the original unsolicited RDP. If the
+	 * prep failed, there is no reference to remove.
+	 */
+	lpfc_nlp_put(ndlp);
+	kfree(rdp_context);
+}
+
+static int
+lpfc_get_rdp_info(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context)
+{
+	LPFC_MBOXQ_t *mbox = NULL;
+	int rc;
+
+	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+	if (!mbox) {
+		lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_ELS,
+				"7105 failed to allocate mailbox memory");
+		return 1;
+	}
+
+	if (lpfc_sli4_dump_page_a0(phba, mbox))
+		goto rdp_fail;
+	mbox->vport = rdp_context->ndlp->vport;
+	mbox->mbox_cmpl = lpfc_mbx_cmpl_rdp_page_a0;
+	mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context;
+	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
+	if (rc == MBX_NOT_FINISHED) {
+		lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
+		return 1;
+	}
+
+	return 0;
+
+rdp_fail:
+	mempool_free(mbox, phba->mbox_mem_pool);
+	return 1;
+}
+
+/*
+ * lpfc_els_rcv_rdp - Process an unsolicited RDP ELS.
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes an unsolicited RDP(Read Diagnostic Parameters)
+ * IOCB. First, the payload of the unsolicited RDP is checked.
+ * Then it will (1) send MBX_DUMP_MEMORY, Embedded DMP_LMSD sub command TYPE-3
+ * for Page A0, (2) send MBX_DUMP_MEMORY, DMP_LMSD for Page A2,
+ * (3) send MBX_READ_LNK_STAT to get link stat, (4) Call lpfc_els_rdp_cmpl
+ * gather all data and send RDP response.
+ *
+ * Return code
+ *   0 - Sent the acc response
+ *   1 - Sent the reject response.
+ */
+static int
+lpfc_els_rcv_rdp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_hba *phba = vport->phba;
+	struct lpfc_dmabuf *pcmd;
+	uint8_t rjt_err, rjt_expl = LSEXP_NOTHING_MORE;
+	struct fc_rdp_req_frame *rdp_req;
+	struct lpfc_rdp_context *rdp_context;
+	union lpfc_wqe128 *cmd = NULL;
+	struct ls_rjt stat;
+
+	if (phba->sli_rev < LPFC_SLI_REV4 ||
+	    bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) <
+						LPFC_SLI_INTF_IF_TYPE_2) {
+		rjt_err = LSRJT_UNABLE_TPC;
+		rjt_expl = LSEXP_REQ_UNSUPPORTED;
+		goto error;
+	}
+
+	if (phba->sli_rev < LPFC_SLI_REV4 || (phba->hba_flag & HBA_FCOE_MODE)) {
+		rjt_err = LSRJT_UNABLE_TPC;
+		rjt_expl = LSEXP_REQ_UNSUPPORTED;
+		goto error;
+	}
+
+	pcmd = cmdiocb->cmd_dmabuf;
+	rdp_req = (struct fc_rdp_req_frame *) pcmd->virt;
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "2422 ELS RDP Request "
+			 "dec len %d tag x%x port_id %d len %d\n",
+			 be32_to_cpu(rdp_req->rdp_des_length),
+			 be32_to_cpu(rdp_req->nport_id_desc.tag),
+			 be32_to_cpu(rdp_req->nport_id_desc.nport_id),
+			 be32_to_cpu(rdp_req->nport_id_desc.length));
+
+	if (sizeof(struct fc_rdp_nport_desc) !=
+			be32_to_cpu(rdp_req->rdp_des_length))
+		goto rjt_logerr;
+	if (RDP_N_PORT_DESC_TAG != be32_to_cpu(rdp_req->nport_id_desc.tag))
+		goto rjt_logerr;
+	if (RDP_NPORT_ID_SIZE !=
+			be32_to_cpu(rdp_req->nport_id_desc.length))
+		goto rjt_logerr;
+	rdp_context = kzalloc(sizeof(struct lpfc_rdp_context), GFP_KERNEL);
+	if (!rdp_context) {
+		rjt_err = LSRJT_UNABLE_TPC;
+		goto error;
+	}
+
+	cmd = &cmdiocb->wqe;
+	rdp_context->ndlp = lpfc_nlp_get(ndlp);
+	if (!rdp_context->ndlp) {
+		kfree(rdp_context);
+		rjt_err = LSRJT_UNABLE_TPC;
+		goto error;
+	}
+	rdp_context->ox_id = bf_get(wqe_rcvoxid,
+				    &cmd->xmit_els_rsp.wqe_com);
+	rdp_context->rx_id = bf_get(wqe_ctxt_tag,
+				    &cmd->xmit_els_rsp.wqe_com);
+	rdp_context->cmpl = lpfc_els_rdp_cmpl;
+	if (lpfc_get_rdp_info(phba, rdp_context)) {
+		lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_ELS,
+				 "2423 Unable to send mailbox");
+		kfree(rdp_context);
+		rjt_err = LSRJT_UNABLE_TPC;
+		lpfc_nlp_put(ndlp);
+		goto error;
+	}
+
+	return 0;
+
+rjt_logerr:
+	rjt_err = LSRJT_LOGICAL_ERR;
+
+error:
+	memset(&stat, 0, sizeof(stat));
+	stat.un.b.lsRjtRsnCode = rjt_err;
+	stat.un.b.lsRjtRsnCodeExp = rjt_expl;
+	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
+	return 1;
+}
+
+
+static void
+lpfc_els_lcb_rsp(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
+{
+	MAILBOX_t *mb;
+	IOCB_t *icmd;
+	union lpfc_wqe128 *wqe;
+	uint8_t *pcmd;
+	struct lpfc_iocbq *elsiocb;
+	struct lpfc_nodelist *ndlp;
+	struct ls_rjt *stat;
+	union lpfc_sli4_cfg_shdr *shdr;
+	struct lpfc_lcb_context *lcb_context;
+	struct fc_lcb_res_frame *lcb_res;
+	uint32_t cmdsize, shdr_status, shdr_add_status;
+	int rc;
+
+	mb = &pmb->u.mb;
+	lcb_context = (struct lpfc_lcb_context *)pmb->ctx_ndlp;
+	ndlp = lcb_context->ndlp;
+	pmb->ctx_ndlp = NULL;
+	pmb->ctx_buf = NULL;
+
+	shdr = (union lpfc_sli4_cfg_shdr *)
+			&pmb->u.mqe.un.beacon_config.header.cfg_shdr;
+	shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
+	shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_MBOX,
+				"0194 SET_BEACON_CONFIG mailbox "
+				"completed with status x%x add_status x%x,"
+				" mbx status x%x\n",
+				shdr_status, shdr_add_status, mb->mbxStatus);
+
+	if ((mb->mbxStatus != MBX_SUCCESS) || shdr_status ||
+	    (shdr_add_status == ADD_STATUS_OPERATION_ALREADY_ACTIVE) ||
+	    (shdr_add_status == ADD_STATUS_INVALID_REQUEST)) {
+		mempool_free(pmb, phba->mbox_mem_pool);
+		goto error;
+	}
+
+	mempool_free(pmb, phba->mbox_mem_pool);
+	cmdsize = sizeof(struct fc_lcb_res_frame);
+	elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
+			lpfc_max_els_tries, ndlp,
+			ndlp->nlp_DID, ELS_CMD_ACC);
+
+	/* Decrement the ndlp reference count from previous mbox command */
+	lpfc_nlp_put(ndlp);
+
+	if (!elsiocb)
+		goto free_lcb_context;
+
+	lcb_res = (struct fc_lcb_res_frame *)elsiocb->cmd_dmabuf->virt;
+
+	memset(lcb_res, 0, sizeof(struct fc_lcb_res_frame));
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, lcb_context->rx_id);
+		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+		       lcb_context->ox_id);
+	} else {
+		icmd = &elsiocb->iocb;
+		icmd->ulpContext = lcb_context->rx_id;
+		icmd->unsli3.rcvsli3.ox_id = lcb_context->ox_id;
+	}
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+	*((uint32_t *)(pcmd)) = ELS_CMD_ACC;
+	lcb_res->lcb_sub_command = lcb_context->sub_command;
+	lcb_res->lcb_type = lcb_context->type;
+	lcb_res->capability = lcb_context->capability;
+	lcb_res->lcb_frequency = lcb_context->frequency;
+	lcb_res->lcb_duration = lcb_context->duration;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+	phba->fc_stat.elsXmitACC++;
+
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		goto out;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+	}
+ out:
+	kfree(lcb_context);
+	return;
+
+error:
+	cmdsize = sizeof(struct fc_lcb_res_frame);
+	elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
+				     lpfc_max_els_tries, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_LS_RJT);
+	lpfc_nlp_put(ndlp);
+	if (!elsiocb)
+		goto free_lcb_context;
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, lcb_context->rx_id);
+		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+		       lcb_context->ox_id);
+	} else {
+		icmd = &elsiocb->iocb;
+		icmd->ulpContext = lcb_context->rx_id;
+		icmd->unsli3.rcvsli3.ox_id = lcb_context->ox_id;
+	}
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+
+	*((uint32_t *)(pcmd)) = ELS_CMD_LS_RJT;
+	stat = (struct ls_rjt *)(pcmd + sizeof(uint32_t));
+	stat->un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
+
+	if (shdr_add_status == ADD_STATUS_OPERATION_ALREADY_ACTIVE)
+		stat->un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
+
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+	phba->fc_stat.elsXmitLSRJT++;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		goto free_lcb_context;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+	}
+free_lcb_context:
+	kfree(lcb_context);
+}
+
+static int
+lpfc_sli4_set_beacon(struct lpfc_vport *vport,
+		     struct lpfc_lcb_context *lcb_context,
+		     uint32_t beacon_state)
+{
+	struct lpfc_hba *phba = vport->phba;
+	union lpfc_sli4_cfg_shdr *cfg_shdr;
+	LPFC_MBOXQ_t *mbox = NULL;
+	uint32_t len;
+	int rc;
+
+	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+	if (!mbox)
+		return 1;
+
+	cfg_shdr = &mbox->u.mqe.un.sli4_config.header.cfg_shdr;
+	len = sizeof(struct lpfc_mbx_set_beacon_config) -
+		sizeof(struct lpfc_sli4_cfg_mhdr);
+	lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_COMMON,
+			 LPFC_MBOX_OPCODE_SET_BEACON_CONFIG, len,
+			 LPFC_SLI4_MBX_EMBED);
+	mbox->ctx_ndlp = (void *)lcb_context;
+	mbox->vport = phba->pport;
+	mbox->mbox_cmpl = lpfc_els_lcb_rsp;
+	bf_set(lpfc_mbx_set_beacon_port_num, &mbox->u.mqe.un.beacon_config,
+	       phba->sli4_hba.physical_port);
+	bf_set(lpfc_mbx_set_beacon_state, &mbox->u.mqe.un.beacon_config,
+	       beacon_state);
+	mbox->u.mqe.un.beacon_config.word5 = 0;		/* Reserved */
+
+	/*
+	 *	Check bv1s bit before issuing the mailbox
+	 *	if bv1s == 1, LCB V1 supported
+	 *	else, LCB V0 supported
+	 */
+
+	if (phba->sli4_hba.pc_sli4_params.bv1s) {
+		/* COMMON_SET_BEACON_CONFIG_V1 */
+		cfg_shdr->request.word9 = BEACON_VERSION_V1;
+		lcb_context->capability |= LCB_CAPABILITY_DURATION;
+		bf_set(lpfc_mbx_set_beacon_port_type,
+		       &mbox->u.mqe.un.beacon_config, 0);
+		bf_set(lpfc_mbx_set_beacon_duration_v1,
+		       &mbox->u.mqe.un.beacon_config,
+		       be16_to_cpu(lcb_context->duration));
+	} else {
+		/* COMMON_SET_BEACON_CONFIG_V0 */
+		if (be16_to_cpu(lcb_context->duration) != 0) {
+			mempool_free(mbox, phba->mbox_mem_pool);
+			return 1;
+		}
+		cfg_shdr->request.word9 = BEACON_VERSION_V0;
+		lcb_context->capability &=  ~(LCB_CAPABILITY_DURATION);
+		bf_set(lpfc_mbx_set_beacon_state,
+		       &mbox->u.mqe.un.beacon_config, beacon_state);
+		bf_set(lpfc_mbx_set_beacon_port_type,
+		       &mbox->u.mqe.un.beacon_config, 1);
+		bf_set(lpfc_mbx_set_beacon_duration,
+		       &mbox->u.mqe.un.beacon_config,
+		       be16_to_cpu(lcb_context->duration));
+	}
+
+	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
+	if (rc == MBX_NOT_FINISHED) {
+		mempool_free(mbox, phba->mbox_mem_pool);
+		return 1;
+	}
+
+	return 0;
+}
+
+
+/**
+ * lpfc_els_rcv_lcb - Process an unsolicited LCB
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes an unsolicited LCB(LINK CABLE BEACON) IOCB.
+ * First, the payload of the unsolicited LCB is checked.
+ * Then based on Subcommand beacon will either turn on or off.
+ *
+ * Return code
+ * 0 - Sent the acc response
+ * 1 - Sent the reject response.
+ **/
+static int
+lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		 struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_hba *phba = vport->phba;
+	struct lpfc_dmabuf *pcmd;
+	uint8_t *lp;
+	struct fc_lcb_request_frame *beacon;
+	struct lpfc_lcb_context *lcb_context;
+	u8 state, rjt_err = 0;
+	struct ls_rjt stat;
+
+	pcmd = cmdiocb->cmd_dmabuf;
+	lp = (uint8_t *)pcmd->virt;
+	beacon = (struct fc_lcb_request_frame *)pcmd->virt;
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			"0192 ELS LCB Data x%x x%x x%x x%x sub x%x "
+			"type x%x frequency %x duration x%x\n",
+			lp[0], lp[1], lp[2],
+			beacon->lcb_command,
+			beacon->lcb_sub_command,
+			beacon->lcb_type,
+			beacon->lcb_frequency,
+			be16_to_cpu(beacon->lcb_duration));
+
+	if (beacon->lcb_sub_command != LPFC_LCB_ON &&
+	    beacon->lcb_sub_command != LPFC_LCB_OFF) {
+		rjt_err = LSRJT_CMD_UNSUPPORTED;
+		goto rjt;
+	}
+
+	if (phba->sli_rev < LPFC_SLI_REV4  ||
+	    phba->hba_flag & HBA_FCOE_MODE ||
+	    (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) <
+	    LPFC_SLI_INTF_IF_TYPE_2)) {
+		rjt_err = LSRJT_CMD_UNSUPPORTED;
+		goto rjt;
+	}
+
+	lcb_context = kmalloc(sizeof(*lcb_context), GFP_KERNEL);
+	if (!lcb_context) {
+		rjt_err = LSRJT_UNABLE_TPC;
+		goto rjt;
+	}
+
+	state = (beacon->lcb_sub_command == LPFC_LCB_ON) ? 1 : 0;
+	lcb_context->sub_command = beacon->lcb_sub_command;
+	lcb_context->capability	= 0;
+	lcb_context->type = beacon->lcb_type;
+	lcb_context->frequency = beacon->lcb_frequency;
+	lcb_context->duration = beacon->lcb_duration;
+	lcb_context->ox_id = get_job_rcvoxid(phba, cmdiocb);
+	lcb_context->rx_id = get_job_ulpcontext(phba, cmdiocb);
+	lcb_context->ndlp = lpfc_nlp_get(ndlp);
+	if (!lcb_context->ndlp) {
+		rjt_err = LSRJT_UNABLE_TPC;
+		goto rjt_free;
+	}
+
+	if (lpfc_sli4_set_beacon(vport, lcb_context, state)) {
+		lpfc_printf_vlog(ndlp->vport, KERN_ERR, LOG_TRACE_EVENT,
+				 "0193 failed to send mail box");
+		lpfc_nlp_put(ndlp);
+		rjt_err = LSRJT_UNABLE_TPC;
+		goto rjt_free;
+	}
+	return 0;
+
+rjt_free:
+	kfree(lcb_context);
+rjt:
+	memset(&stat, 0, sizeof(stat));
+	stat.un.b.lsRjtRsnCode = rjt_err;
+	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
+	return 1;
+}
+
+
+/**
+ * lpfc_els_flush_rscn - Clean up any rscn activities with a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine cleans up any Registration State Change Notification
+ * (RSCN) activity with a @vport. Note that the fc_rscn_flush flag of the
+ * @vport together with the host_lock is used to prevent multiple thread
+ * trying to access the RSCN array on a same @vport at the same time.
+ **/
+void
+lpfc_els_flush_rscn(struct lpfc_vport *vport)
+{
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_hba  *phba = vport->phba;
+	int i;
+
+	spin_lock_irq(shost->host_lock);
+	if (vport->fc_rscn_flush) {
+		/* Another thread is walking fc_rscn_id_list on this vport */
+		spin_unlock_irq(shost->host_lock);
+		return;
+	}
+	/* Indicate we are walking lpfc_els_flush_rscn on this vport */
+	vport->fc_rscn_flush = 1;
+	spin_unlock_irq(shost->host_lock);
+
+	for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
+		lpfc_in_buf_free(phba, vport->fc_rscn_id_list[i]);
+		vport->fc_rscn_id_list[i] = NULL;
+	}
+	spin_lock_irq(shost->host_lock);
+	vport->fc_rscn_id_cnt = 0;
+	vport->fc_flag &= ~(FC_RSCN_MODE | FC_RSCN_DISCOVERY);
+	spin_unlock_irq(shost->host_lock);
+	lpfc_can_disctmo(vport);
+	/* Indicate we are done walking this fc_rscn_id_list */
+	vport->fc_rscn_flush = 0;
+}
+
+/**
+ * lpfc_rscn_payload_check - Check whether there is a pending rscn to a did
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @did: remote destination port identifier.
+ *
+ * This routine checks whether there is any pending Registration State
+ * Configuration Notification (RSCN) to a @did on @vport.
+ *
+ * Return code
+ *   None zero - The @did matched with a pending rscn
+ *   0 - not able to match @did with a pending rscn
+ **/
+int
+lpfc_rscn_payload_check(struct lpfc_vport *vport, uint32_t did)
+{
+	D_ID ns_did;
+	D_ID rscn_did;
+	uint32_t *lp;
+	uint32_t payload_len, i;
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+
+	ns_did.un.word = did;
+
+	/* Never match fabric nodes for RSCNs */
+	if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
+		return 0;
+
+	/* If we are doing a FULL RSCN rediscovery, match everything */
+	if (vport->fc_flag & FC_RSCN_DISCOVERY)
+		return did;
+
+	spin_lock_irq(shost->host_lock);
+	if (vport->fc_rscn_flush) {
+		/* Another thread is walking fc_rscn_id_list on this vport */
+		spin_unlock_irq(shost->host_lock);
+		return 0;
+	}
+	/* Indicate we are walking fc_rscn_id_list on this vport */
+	vport->fc_rscn_flush = 1;
+	spin_unlock_irq(shost->host_lock);
+	for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
+		lp = vport->fc_rscn_id_list[i]->virt;
+		payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
+		payload_len -= sizeof(uint32_t);	/* take off word 0 */
+		while (payload_len) {
+			rscn_did.un.word = be32_to_cpu(*lp++);
+			payload_len -= sizeof(uint32_t);
+			switch (rscn_did.un.b.resv & RSCN_ADDRESS_FORMAT_MASK) {
+			case RSCN_ADDRESS_FORMAT_PORT:
+				if ((ns_did.un.b.domain == rscn_did.un.b.domain)
+				    && (ns_did.un.b.area == rscn_did.un.b.area)
+				    && (ns_did.un.b.id == rscn_did.un.b.id))
+					goto return_did_out;
+				break;
+			case RSCN_ADDRESS_FORMAT_AREA:
+				if ((ns_did.un.b.domain == rscn_did.un.b.domain)
+				    && (ns_did.un.b.area == rscn_did.un.b.area))
+					goto return_did_out;
+				break;
+			case RSCN_ADDRESS_FORMAT_DOMAIN:
+				if (ns_did.un.b.domain == rscn_did.un.b.domain)
+					goto return_did_out;
+				break;
+			case RSCN_ADDRESS_FORMAT_FABRIC:
+				goto return_did_out;
+			}
+		}
+	}
+	/* Indicate we are done with walking fc_rscn_id_list on this vport */
+	vport->fc_rscn_flush = 0;
+	return 0;
+return_did_out:
+	/* Indicate we are done with walking fc_rscn_id_list on this vport */
+	vport->fc_rscn_flush = 0;
+	return did;
+}
+
+/**
+ * lpfc_rscn_recovery_check - Send recovery event to vport nodes matching rscn
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine sends recovery (NLP_EVT_DEVICE_RECOVERY) event to the
+ * state machine for a @vport's nodes that are with pending RSCN (Registration
+ * State Change Notification).
+ *
+ * Return code
+ *   0 - Successful (currently alway return 0)
+ **/
+static int
+lpfc_rscn_recovery_check(struct lpfc_vport *vport)
+{
+	struct lpfc_nodelist *ndlp = NULL, *n;
+
+	/* Move all affected nodes by pending RSCNs to NPR state. */
+	list_for_each_entry_safe(ndlp, n, &vport->fc_nodes, nlp_listp) {
+		if ((ndlp->nlp_state == NLP_STE_UNUSED_NODE) ||
+		    !lpfc_rscn_payload_check(vport, ndlp->nlp_DID))
+			continue;
+
+		/* NVME Target mode does not do RSCN Recovery. */
+		if (vport->phba->nvmet_support)
+			continue;
+
+		/* If we are in the process of doing discovery on this
+		 * NPort, let it continue on its own.
+		 */
+		switch (ndlp->nlp_state) {
+		case  NLP_STE_PLOGI_ISSUE:
+		case  NLP_STE_ADISC_ISSUE:
+		case  NLP_STE_REG_LOGIN_ISSUE:
+		case  NLP_STE_PRLI_ISSUE:
+		case  NLP_STE_LOGO_ISSUE:
+			continue;
+		}
+
+		lpfc_disc_state_machine(vport, ndlp, NULL,
+					NLP_EVT_DEVICE_RECOVERY);
+		lpfc_cancel_retry_delay_tmo(vport, ndlp);
+	}
+	return 0;
+}
+
+/**
+ * lpfc_send_rscn_event - Send an RSCN event to management application
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ *
+ * lpfc_send_rscn_event sends an RSCN netlink event to management
+ * applications.
+ */
+static void
+lpfc_send_rscn_event(struct lpfc_vport *vport,
+		struct lpfc_iocbq *cmdiocb)
+{
+	struct lpfc_dmabuf *pcmd;
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+	uint32_t *payload_ptr;
+	uint32_t payload_len;
+	struct lpfc_rscn_event_header *rscn_event_data;
+
+	pcmd = cmdiocb->cmd_dmabuf;
+	payload_ptr = (uint32_t *) pcmd->virt;
+	payload_len = be32_to_cpu(*payload_ptr & ~ELS_CMD_MASK);
+
+	rscn_event_data = kmalloc(sizeof(struct lpfc_rscn_event_header) +
+		payload_len, GFP_KERNEL);
+	if (!rscn_event_data) {
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+			"0147 Failed to allocate memory for RSCN event\n");
+		return;
+	}
+	rscn_event_data->event_type = FC_REG_RSCN_EVENT;
+	rscn_event_data->payload_length = payload_len;
+	memcpy(rscn_event_data->rscn_payload, payload_ptr,
+		payload_len);
+
+	fc_host_post_vendor_event(shost,
+		fc_get_event_number(),
+		sizeof(struct lpfc_rscn_event_header) + payload_len,
+		(char *)rscn_event_data,
+		LPFC_NL_VENDOR_ID);
+
+	kfree(rscn_event_data);
+}
+
+/**
+ * lpfc_els_rcv_rscn - Process an unsolicited rscn iocb
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes an unsolicited RSCN (Registration State Change
+ * Notification) IOCB. First, the payload of the unsolicited RSCN is walked
+ * to invoke fc_host_post_event() routine to the FC transport layer. If the
+ * discover state machine is about to begin discovery, it just accepts the
+ * RSCN and the discovery process will satisfy the RSCN. If this RSCN only
+ * contains N_Port IDs for other vports on this HBA, it just accepts the
+ * RSCN and ignore processing it. If the state machine is in the recovery
+ * state, the fc_rscn_id_list of this @vport is walked and the
+ * lpfc_rscn_recovery_check() routine is invoked to send recovery event for
+ * all nodes that match RSCN payload. Otherwise, the lpfc_els_handle_rscn()
+ * routine is invoked to handle the RSCN event.
+ *
+ * Return code
+ *   0 - Just sent the acc response
+ *   1 - Sent the acc response and waited for name server completion
+ **/
+static int
+lpfc_els_rcv_rscn(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		  struct lpfc_nodelist *ndlp)
+{
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_hba  *phba = vport->phba;
+	struct lpfc_dmabuf *pcmd;
+	uint32_t *lp, *datap;
+	uint32_t payload_len, length, nportid, *cmd;
+	int rscn_cnt;
+	int rscn_id = 0, hba_id = 0;
+	int i, tmo;
+
+	pcmd = cmdiocb->cmd_dmabuf;
+	lp = (uint32_t *) pcmd->virt;
+
+	payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
+	payload_len -= sizeof(uint32_t);	/* take off word 0 */
+	/* RSCN received */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+			 "0214 RSCN received Data: x%x x%x x%x x%x\n",
+			 vport->fc_flag, payload_len, *lp,
+			 vport->fc_rscn_id_cnt);
+
+	/* Send an RSCN event to the management application */
+	lpfc_send_rscn_event(vport, cmdiocb);
+
+	for (i = 0; i < payload_len/sizeof(uint32_t); i++)
+		fc_host_post_event(shost, fc_get_event_number(),
+			FCH_EVT_RSCN, lp[i]);
+
+	/* Check if RSCN is coming from a direct-connected remote NPort */
+	if (vport->fc_flag & FC_PT2PT) {
+		/* If so, just ACC it, no other action needed for now */
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+				 "2024 pt2pt RSCN %08x Data: x%x x%x\n",
+				 *lp, vport->fc_flag, payload_len);
+		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
+
+		/* Check to see if we need to NVME rescan this target
+		 * remoteport.
+		 */
+		if (ndlp->nlp_fc4_type & NLP_FC4_NVME &&
+		    ndlp->nlp_type & (NLP_NVME_TARGET | NLP_NVME_DISCOVERY))
+			lpfc_nvme_rescan_port(vport, ndlp);
+		return 0;
+	}
+
+	/* If we are about to begin discovery, just ACC the RSCN.
+	 * Discovery processing will satisfy it.
+	 */
+	if (vport->port_state <= LPFC_NS_QRY) {
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV RSCN ignore: did:x%x/ste:x%x flg:x%x",
+			ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
+
+		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
+		return 0;
+	}
+
+	/* If this RSCN just contains NPortIDs for other vports on this HBA,
+	 * just ACC and ignore it.
+	 */
+	if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
+		!(vport->cfg_peer_port_login)) {
+		i = payload_len;
+		datap = lp;
+		while (i > 0) {
+			nportid = *datap++;
+			nportid = ((be32_to_cpu(nportid)) & Mask_DID);
+			i -= sizeof(uint32_t);
+			rscn_id++;
+			if (lpfc_find_vport_by_did(phba, nportid))
+				hba_id++;
+		}
+		if (rscn_id == hba_id) {
+			/* ALL NPortIDs in RSCN are on HBA */
+			lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+					 "0219 Ignore RSCN "
+					 "Data: x%x x%x x%x x%x\n",
+					 vport->fc_flag, payload_len,
+					 *lp, vport->fc_rscn_id_cnt);
+			lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+				"RCV RSCN vport:  did:x%x/ste:x%x flg:x%x",
+				ndlp->nlp_DID, vport->port_state,
+				ndlp->nlp_flag);
+
+			lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb,
+				ndlp, NULL);
+			/* Restart disctmo if its already running */
+			if (vport->fc_flag & FC_DISC_TMO) {
+				tmo = ((phba->fc_ratov * 3) + 3);
+				mod_timer(&vport->fc_disctmo,
+					  jiffies +
+					  msecs_to_jiffies(1000 * tmo));
+			}
+			return 0;
+		}
+	}
+
+	spin_lock_irq(shost->host_lock);
+	if (vport->fc_rscn_flush) {
+		/* Another thread is walking fc_rscn_id_list on this vport */
+		vport->fc_flag |= FC_RSCN_DISCOVERY;
+		spin_unlock_irq(shost->host_lock);
+		/* Send back ACC */
+		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
+		return 0;
+	}
+	/* Indicate we are walking fc_rscn_id_list on this vport */
+	vport->fc_rscn_flush = 1;
+	spin_unlock_irq(shost->host_lock);
+	/* Get the array count after successfully have the token */
+	rscn_cnt = vport->fc_rscn_id_cnt;
+	/* If we are already processing an RSCN, save the received
+	 * RSCN payload buffer, cmdiocb->cmd_dmabuf to process later.
+	 */
+	if (vport->fc_flag & (FC_RSCN_MODE | FC_NDISC_ACTIVE)) {
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV RSCN defer:  did:x%x/ste:x%x flg:x%x",
+			ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
+
+		spin_lock_irq(shost->host_lock);
+		vport->fc_flag |= FC_RSCN_DEFERRED;
+
+		/* Restart disctmo if its already running */
+		if (vport->fc_flag & FC_DISC_TMO) {
+			tmo = ((phba->fc_ratov * 3) + 3);
+			mod_timer(&vport->fc_disctmo,
+				  jiffies + msecs_to_jiffies(1000 * tmo));
+		}
+		if ((rscn_cnt < FC_MAX_HOLD_RSCN) &&
+		    !(vport->fc_flag & FC_RSCN_DISCOVERY)) {
+			vport->fc_flag |= FC_RSCN_MODE;
+			spin_unlock_irq(shost->host_lock);
+			if (rscn_cnt) {
+				cmd = vport->fc_rscn_id_list[rscn_cnt-1]->virt;
+				length = be32_to_cpu(*cmd & ~ELS_CMD_MASK);
+			}
+			if ((rscn_cnt) &&
+			    (payload_len + length <= LPFC_BPL_SIZE)) {
+				*cmd &= ELS_CMD_MASK;
+				*cmd |= cpu_to_be32(payload_len + length);
+				memcpy(((uint8_t *)cmd) + length, lp,
+				       payload_len);
+			} else {
+				vport->fc_rscn_id_list[rscn_cnt] = pcmd;
+				vport->fc_rscn_id_cnt++;
+				/* If we zero, cmdiocb->cmd_dmabuf, the calling
+				 * routine will not try to free it.
+				 */
+				cmdiocb->cmd_dmabuf = NULL;
+			}
+			/* Deferred RSCN */
+			lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+					 "0235 Deferred RSCN "
+					 "Data: x%x x%x x%x\n",
+					 vport->fc_rscn_id_cnt, vport->fc_flag,
+					 vport->port_state);
+		} else {
+			vport->fc_flag |= FC_RSCN_DISCOVERY;
+			spin_unlock_irq(shost->host_lock);
+			/* ReDiscovery RSCN */
+			lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+					 "0234 ReDiscovery RSCN "
+					 "Data: x%x x%x x%x\n",
+					 vport->fc_rscn_id_cnt, vport->fc_flag,
+					 vport->port_state);
+		}
+		/* Indicate we are done walking fc_rscn_id_list on this vport */
+		vport->fc_rscn_flush = 0;
+		/* Send back ACC */
+		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
+		/* send RECOVERY event for ALL nodes that match RSCN payload */
+		lpfc_rscn_recovery_check(vport);
+		return 0;
+	}
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+		"RCV RSCN:        did:x%x/ste:x%x flg:x%x",
+		ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
+
+	spin_lock_irq(shost->host_lock);
+	vport->fc_flag |= FC_RSCN_MODE;
+	spin_unlock_irq(shost->host_lock);
+	vport->fc_rscn_id_list[vport->fc_rscn_id_cnt++] = pcmd;
+	/* Indicate we are done walking fc_rscn_id_list on this vport */
+	vport->fc_rscn_flush = 0;
+	/*
+	 * If we zero, cmdiocb->cmd_dmabuf, the calling routine will
+	 * not try to free it.
+	 */
+	cmdiocb->cmd_dmabuf = NULL;
+	lpfc_set_disctmo(vport);
+	/* Send back ACC */
+	lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
+	/* send RECOVERY event for ALL nodes that match RSCN payload */
+	lpfc_rscn_recovery_check(vport);
+	return lpfc_els_handle_rscn(vport);
+}
+
+/**
+ * lpfc_els_handle_rscn - Handle rscn for a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine handles the Registration State Configuration Notification
+ * (RSCN) for a @vport. If login to NameServer does not exist, a new ndlp shall
+ * be created and a Port Login (PLOGI) to the NameServer is issued. Otherwise,
+ * if the ndlp to NameServer exists, a Common Transport (CT) command to the
+ * NameServer shall be issued. If CT command to the NameServer fails to be
+ * issued, the lpfc_els_flush_rscn() routine shall be invoked to clean up any
+ * RSCN activities with the @vport.
+ *
+ * Return code
+ *   0 - Cleaned up rscn on the @vport
+ *   1 - Wait for plogi to name server before proceed
+ **/
+int
+lpfc_els_handle_rscn(struct lpfc_vport *vport)
+{
+	struct lpfc_nodelist *ndlp;
+	struct lpfc_hba  *phba = vport->phba;
+
+	/* Ignore RSCN if the port is being torn down. */
+	if (vport->load_flag & FC_UNLOADING) {
+		lpfc_els_flush_rscn(vport);
+		return 0;
+	}
+
+	/* Start timer for RSCN processing */
+	lpfc_set_disctmo(vport);
+
+	/* RSCN processed */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+			 "0215 RSCN processed Data: x%x x%x x%x x%x x%x x%x\n",
+			 vport->fc_flag, 0, vport->fc_rscn_id_cnt,
+			 vport->port_state, vport->num_disc_nodes,
+			 vport->gidft_inp);
+
+	/* To process RSCN, first compare RSCN data with NameServer */
+	vport->fc_ns_retry = 0;
+	vport->num_disc_nodes = 0;
+
+	ndlp = lpfc_findnode_did(vport, NameServer_DID);
+	if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
+		/* Good ndlp, issue CT Request to NameServer.  Need to
+		 * know how many gidfts were issued.  If none, then just
+		 * flush the RSCN.  Otherwise, the outstanding requests
+		 * need to complete.
+		 */
+		if (phba->cfg_ns_query == LPFC_NS_QUERY_GID_FT) {
+			if (lpfc_issue_gidft(vport) > 0)
+				return 1;
+		} else if (phba->cfg_ns_query == LPFC_NS_QUERY_GID_PT) {
+			if (lpfc_issue_gidpt(vport) > 0)
+				return 1;
+		} else {
+			return 1;
+		}
+	} else {
+		/* Nameserver login in question.  Revalidate. */
+		if (ndlp) {
+			ndlp->nlp_prev_state = NLP_STE_UNUSED_NODE;
+			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
+		} else {
+			ndlp = lpfc_nlp_init(vport, NameServer_DID);
+			if (!ndlp) {
+				lpfc_els_flush_rscn(vport);
+				return 0;
+			}
+			ndlp->nlp_prev_state = ndlp->nlp_state;
+			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
+		}
+		ndlp->nlp_type |= NLP_FABRIC;
+		lpfc_issue_els_plogi(vport, NameServer_DID, 0);
+		/* Wait for NameServer login cmpl before we can
+		 * continue
+		 */
+		return 1;
+	}
+
+	lpfc_els_flush_rscn(vport);
+	return 0;
+}
+
+/**
+ * lpfc_els_rcv_flogi - Process an unsolicited flogi iocb
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes Fabric Login (FLOGI) IOCB received as an ELS
+ * unsolicited event. An unsolicited FLOGI can be received in a point-to-
+ * point topology. As an unsolicited FLOGI should not be received in a loop
+ * mode, any unsolicited FLOGI received in loop mode shall be ignored. The
+ * lpfc_check_sparm() routine is invoked to check the parameters in the
+ * unsolicited FLOGI. If parameters validation failed, the routine
+ * lpfc_els_rsp_reject() shall be called with reject reason code set to
+ * LSEXP_SPARM_OPTIONS to reject the FLOGI. Otherwise, the Port WWN in the
+ * FLOGI shall be compared with the Port WWN of the @vport to determine who
+ * will initiate PLOGI. The higher lexicographical value party shall has
+ * higher priority (as the winning port) and will initiate PLOGI and
+ * communicate Port_IDs (Addresses) for both nodes in PLOGI. The result
+ * of this will be marked in the @vport fc_flag field with FC_PT2PT_PLOGI
+ * and then the lpfc_els_rsp_acc() routine is invoked to accept the FLOGI.
+ *
+ * Return code
+ *   0 - Successfully processed the unsolicited flogi
+ *   1 - Failed to process the unsolicited flogi
+ **/
+static int
+lpfc_els_rcv_flogi(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		   struct lpfc_nodelist *ndlp)
+{
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_hba  *phba = vport->phba;
+	struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf;
+	uint32_t *lp = (uint32_t *) pcmd->virt;
+	union lpfc_wqe128 *wqe = &cmdiocb->wqe;
+	struct serv_parm *sp;
+	LPFC_MBOXQ_t *mbox;
+	uint32_t cmd, did;
+	int rc;
+	uint32_t fc_flag = 0;
+	uint32_t port_state = 0;
+
+	/* Clear external loopback plug detected flag */
+	phba->link_flag &= ~LS_EXTERNAL_LOOPBACK;
+
+	cmd = *lp++;
+	sp = (struct serv_parm *) lp;
+
+	/* FLOGI received */
+
+	lpfc_set_disctmo(vport);
+
+	if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
+		/* We should never receive a FLOGI in loop mode, ignore it */
+		did =  bf_get(wqe_els_did, &wqe->xmit_els_rsp.wqe_dest);
+
+		/* An FLOGI ELS command <elsCmd> was received from DID <did> in
+		   Loop Mode */
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				 "0113 An FLOGI ELS command x%x was "
+				 "received from DID x%x in Loop Mode\n",
+				 cmd, did);
+		return 1;
+	}
+
+	(void) lpfc_check_sparm(vport, ndlp, sp, CLASS3, 1);
+
+	/*
+	 * If our portname is greater than the remote portname,
+	 * then we initiate Nport login.
+	 */
+
+	rc = memcmp(&vport->fc_portname, &sp->portName,
+		    sizeof(struct lpfc_name));
+
+	if (!rc) {
+		if (phba->sli_rev < LPFC_SLI_REV4) {
+			mbox = mempool_alloc(phba->mbox_mem_pool,
+					     GFP_KERNEL);
+			if (!mbox)
+				return 1;
+			lpfc_linkdown(phba);
+			lpfc_init_link(phba, mbox,
+				       phba->cfg_topology,
+				       phba->cfg_link_speed);
+			mbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
+			mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
+			mbox->vport = vport;
+			rc = lpfc_sli_issue_mbox(phba, mbox,
+						 MBX_NOWAIT);
+			lpfc_set_loopback_flag(phba);
+			if (rc == MBX_NOT_FINISHED)
+				mempool_free(mbox, phba->mbox_mem_pool);
+			return 1;
+		}
+
+		/* External loopback plug insertion detected */
+		phba->link_flag |= LS_EXTERNAL_LOOPBACK;
+
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_LIBDFC,
+				 "1119 External Loopback plug detected\n");
+
+		/* abort the flogi coming back to ourselves
+		 * due to external loopback on the port.
+		 */
+		lpfc_els_abort_flogi(phba);
+		return 0;
+
+	} else if (rc > 0) {	/* greater than */
+		spin_lock_irq(shost->host_lock);
+		vport->fc_flag |= FC_PT2PT_PLOGI;
+		spin_unlock_irq(shost->host_lock);
+
+		/* If we have the high WWPN we can assign our own
+		 * myDID; otherwise, we have to WAIT for a PLOGI
+		 * from the remote NPort to find out what it
+		 * will be.
+		 */
+		vport->fc_myDID = PT2PT_LocalID;
+	} else {
+		vport->fc_myDID = PT2PT_RemoteID;
+	}
+
+	/*
+	 * The vport state should go to LPFC_FLOGI only
+	 * AFTER we issue a FLOGI, not receive one.
+	 */
+	spin_lock_irq(shost->host_lock);
+	fc_flag = vport->fc_flag;
+	port_state = vport->port_state;
+	vport->fc_flag |= FC_PT2PT;
+	vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
+
+	/* Acking an unsol FLOGI.  Count 1 for link bounce
+	 * work-around.
+	 */
+	vport->rcv_flogi_cnt++;
+	spin_unlock_irq(shost->host_lock);
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "3311 Rcv Flogi PS x%x new PS x%x "
+			 "fc_flag x%x new fc_flag x%x\n",
+			 port_state, vport->port_state,
+			 fc_flag, vport->fc_flag);
+
+	/*
+	 * We temporarily set fc_myDID to make it look like we are
+	 * a Fabric. This is done just so we end up with the right
+	 * did / sid on the FLOGI ACC rsp.
+	 */
+	did = vport->fc_myDID;
+	vport->fc_myDID = Fabric_DID;
+
+	memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
+
+	/* Defer ACC response until AFTER we issue a FLOGI */
+	if (!(phba->hba_flag & HBA_FLOGI_ISSUED)) {
+		phba->defer_flogi_acc_rx_id = bf_get(wqe_ctxt_tag,
+						     &wqe->xmit_els_rsp.wqe_com);
+		phba->defer_flogi_acc_ox_id = bf_get(wqe_rcvoxid,
+						     &wqe->xmit_els_rsp.wqe_com);
+
+		vport->fc_myDID = did;
+
+		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+				 "3344 Deferring FLOGI ACC: rx_id: x%x,"
+				 " ox_id: x%x, hba_flag x%x\n",
+				 phba->defer_flogi_acc_rx_id,
+				 phba->defer_flogi_acc_ox_id, phba->hba_flag);
+
+		phba->defer_flogi_acc_flag = true;
+
+		return 0;
+	}
+
+	/* Send back ACC */
+	lpfc_els_rsp_acc(vport, ELS_CMD_FLOGI, cmdiocb, ndlp, NULL);
+
+	/* Now lets put fc_myDID back to what its supposed to be */
+	vport->fc_myDID = did;
+
+	return 0;
+}
+
+/**
+ * lpfc_els_rcv_rnid - Process an unsolicited rnid iocb
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes Request Node Identification Data (RNID) IOCB
+ * received as an ELS unsolicited event. Only when the RNID specified format
+ * 0x0 or 0xDF (Topology Discovery Specific Node Identification Data)
+ * present, this routine will invoke the lpfc_els_rsp_rnid_acc() routine to
+ * Accept (ACC) the RNID ELS command. All the other RNID formats are
+ * rejected by invoking the lpfc_els_rsp_reject() routine.
+ *
+ * Return code
+ *   0 - Successfully processed rnid iocb (currently always return 0)
+ **/
+static int
+lpfc_els_rcv_rnid(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		  struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_dmabuf *pcmd;
+	uint32_t *lp;
+	RNID *rn;
+	struct ls_rjt stat;
+
+	pcmd = cmdiocb->cmd_dmabuf;
+	lp = (uint32_t *) pcmd->virt;
+
+	lp++;
+	rn = (RNID *) lp;
+
+	/* RNID received */
+
+	switch (rn->Format) {
+	case 0:
+	case RNID_TOPOLOGY_DISC:
+		/* Send back ACC */
+		lpfc_els_rsp_rnid_acc(vport, rn->Format, cmdiocb, ndlp);
+		break;
+	default:
+		/* Reject this request because format not supported */
+		stat.un.b.lsRjtRsvd0 = 0;
+		stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
+		stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
+		stat.un.b.vendorUnique = 0;
+		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
+			NULL);
+	}
+	return 0;
+}
+
+/**
+ * lpfc_els_rcv_echo - Process an unsolicited echo iocb
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * Return code
+ *   0 - Successfully processed echo iocb (currently always return 0)
+ **/
+static int
+lpfc_els_rcv_echo(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		  struct lpfc_nodelist *ndlp)
+{
+	uint8_t *pcmd;
+
+	pcmd = (uint8_t *)cmdiocb->cmd_dmabuf->virt;
+
+	/* skip over first word of echo command to find echo data */
+	pcmd += sizeof(uint32_t);
+
+	lpfc_els_rsp_echo_acc(vport, pcmd, cmdiocb, ndlp);
+	return 0;
+}
+
+/**
+ * lpfc_els_rcv_lirr - Process an unsolicited lirr iocb
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes a Link Incident Report Registration(LIRR) IOCB
+ * received as an ELS unsolicited event. Currently, this function just invokes
+ * the lpfc_els_rsp_reject() routine to reject the LIRR IOCB unconditionally.
+ *
+ * Return code
+ *   0 - Successfully processed lirr iocb (currently always return 0)
+ **/
+static int
+lpfc_els_rcv_lirr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		  struct lpfc_nodelist *ndlp)
+{
+	struct ls_rjt stat;
+
+	/* For now, unconditionally reject this command */
+	stat.un.b.lsRjtRsvd0 = 0;
+	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
+	stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
+	stat.un.b.vendorUnique = 0;
+	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
+	return 0;
+}
+
+/**
+ * lpfc_els_rcv_rrq - Process an unsolicited rrq iocb
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes a Reinstate Recovery Qualifier (RRQ) IOCB
+ * received as an ELS unsolicited event. A request to RRQ shall only
+ * be accepted if the Originator Nx_Port N_Port_ID or the Responder
+ * Nx_Port N_Port_ID of the target Exchange is the same as the
+ * N_Port_ID of the Nx_Port that makes the request. If the RRQ is
+ * not accepted, an LS_RJT with reason code "Unable to perform
+ * command request" and reason code explanation "Invalid Originator
+ * S_ID" shall be returned. For now, we just unconditionally accept
+ * RRQ from the target.
+ **/
+static void
+lpfc_els_rcv_rrq(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		 struct lpfc_nodelist *ndlp)
+{
+	lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
+	if (vport->phba->sli_rev == LPFC_SLI_REV4)
+		lpfc_els_clear_rrq(vport, cmdiocb, ndlp);
+}
+
+/**
+ * lpfc_els_rsp_rls_acc - Completion callbk func for MBX_READ_LNK_STAT mbox cmd
+ * @phba: pointer to lpfc hba data structure.
+ * @pmb: pointer to the driver internal queue element for mailbox command.
+ *
+ * This routine is the completion callback function for the MBX_READ_LNK_STAT
+ * mailbox command. This callback function is to actually send the Accept
+ * (ACC) response to a Read Link Status (RLS) unsolicited IOCB event. It
+ * collects the link statistics from the completion of the MBX_READ_LNK_STAT
+ * mailbox command, constructs the RLS response with the link statistics
+ * collected, and then invokes the lpfc_sli_issue_iocb() routine to send ACC
+ * response to the RLS.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the RLS Accept Response
+ * ELS IOCB command.
+ *
+ **/
+static void
+lpfc_els_rsp_rls_acc(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
+{
+	int rc = 0;
+	MAILBOX_t *mb;
+	IOCB_t *icmd;
+	union lpfc_wqe128 *wqe;
+	struct RLS_RSP *rls_rsp;
+	uint8_t *pcmd;
+	struct lpfc_iocbq *elsiocb;
+	struct lpfc_nodelist *ndlp;
+	uint16_t oxid;
+	uint16_t rxid;
+	uint32_t cmdsize;
+	u32 ulp_context;
+
+	mb = &pmb->u.mb;
+
+	ndlp = pmb->ctx_ndlp;
+	rxid = (uint16_t)((unsigned long)(pmb->ctx_buf) & 0xffff);
+	oxid = (uint16_t)(((unsigned long)(pmb->ctx_buf) >> 16) & 0xffff);
+	pmb->ctx_buf = NULL;
+	pmb->ctx_ndlp = NULL;
+
+	if (mb->mbxStatus) {
+		mempool_free(pmb, phba->mbox_mem_pool);
+		return;
+	}
+
+	cmdsize = sizeof(struct RLS_RSP) + sizeof(uint32_t);
+	elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
+				     lpfc_max_els_tries, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_ACC);
+
+	/* Decrement the ndlp reference count from previous mbox command */
+	lpfc_nlp_put(ndlp);
+
+	if (!elsiocb) {
+		mempool_free(pmb, phba->mbox_mem_pool);
+		return;
+	}
+
+	ulp_context = get_job_ulpcontext(phba, elsiocb);
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		/* Xri / rx_id */
+		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, rxid);
+		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com, oxid);
+	} else {
+		icmd = &elsiocb->iocb;
+		icmd->ulpContext = rxid;
+		icmd->unsli3.rcvsli3.ox_id = oxid;
+	}
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
+	pcmd += sizeof(uint32_t); /* Skip past command */
+	rls_rsp = (struct RLS_RSP *)pcmd;
+
+	rls_rsp->linkFailureCnt = cpu_to_be32(mb->un.varRdLnk.linkFailureCnt);
+	rls_rsp->lossSyncCnt = cpu_to_be32(mb->un.varRdLnk.lossSyncCnt);
+	rls_rsp->lossSignalCnt = cpu_to_be32(mb->un.varRdLnk.lossSignalCnt);
+	rls_rsp->primSeqErrCnt = cpu_to_be32(mb->un.varRdLnk.primSeqErrCnt);
+	rls_rsp->invalidXmitWord = cpu_to_be32(mb->un.varRdLnk.invalidXmitWord);
+	rls_rsp->crcCnt = cpu_to_be32(mb->un.varRdLnk.crcCnt);
+	mempool_free(pmb, phba->mbox_mem_pool);
+	/* Xmit ELS RLS ACC response tag <ulpIoTag> */
+	lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
+			 "2874 Xmit ELS RLS ACC response tag x%x xri x%x, "
+			 "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x\n",
+			 elsiocb->iotag, ulp_context,
+			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
+			 ndlp->nlp_rpi);
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+	phba->fc_stat.elsXmitACC++;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+	}
+	return;
+}
+
+/**
+ * lpfc_els_rcv_rls - Process an unsolicited rls iocb
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes Read Link Status (RLS) IOCB received as an
+ * ELS unsolicited event. It first checks the remote port state. If the
+ * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
+ * state, it invokes the lpfc_els_rsl_reject() routine to send the reject
+ * response. Otherwise, it issue the MBX_READ_LNK_STAT mailbox command
+ * for reading the HBA link statistics. It is for the callback function,
+ * lpfc_els_rsp_rls_acc(), set to the MBX_READ_LNK_STAT mailbox command
+ * to actually sending out RPL Accept (ACC) response.
+ *
+ * Return codes
+ *   0 - Successfully processed rls iocb (currently always return 0)
+ **/
+static int
+lpfc_els_rcv_rls(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		 struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_hba *phba = vport->phba;
+	LPFC_MBOXQ_t *mbox;
+	struct ls_rjt stat;
+	u32 ctx = get_job_ulpcontext(phba, cmdiocb);
+	u32 ox_id = get_job_rcvoxid(phba, cmdiocb);
+
+	if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
+	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
+		/* reject the unsolicited RLS request and done with it */
+		goto reject_out;
+
+	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_ATOMIC);
+	if (mbox) {
+		lpfc_read_lnk_stat(phba, mbox);
+		mbox->ctx_buf = (void *)((unsigned long)
+					 (ox_id << 16 | ctx));
+		mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
+		if (!mbox->ctx_ndlp)
+			goto node_err;
+		mbox->vport = vport;
+		mbox->mbox_cmpl = lpfc_els_rsp_rls_acc;
+		if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
+			!= MBX_NOT_FINISHED)
+			/* Mbox completion will send ELS Response */
+			return 0;
+		/* Decrement reference count used for the failed mbox
+		 * command.
+		 */
+		lpfc_nlp_put(ndlp);
+node_err:
+		mempool_free(mbox, phba->mbox_mem_pool);
+	}
+reject_out:
+	/* issue rejection response */
+	stat.un.b.lsRjtRsvd0 = 0;
+	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
+	stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
+	stat.un.b.vendorUnique = 0;
+	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
+	return 0;
+}
+
+/**
+ * lpfc_els_rcv_rtv - Process an unsolicited rtv iocb
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes Read Timout Value (RTV) IOCB received as an
+ * ELS unsolicited event. It first checks the remote port state. If the
+ * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
+ * state, it invokes the lpfc_els_rsl_reject() routine to send the reject
+ * response. Otherwise, it sends the Accept(ACC) response to a Read Timeout
+ * Value (RTV) unsolicited IOCB event.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the RTV Accept Response
+ * ELS IOCB command.
+ *
+ * Return codes
+ *   0 - Successfully processed rtv iocb (currently always return 0)
+ **/
+static int
+lpfc_els_rcv_rtv(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		 struct lpfc_nodelist *ndlp)
+{
+	int rc = 0;
+	IOCB_t *icmd;
+	union lpfc_wqe128 *wqe;
+	struct lpfc_hba *phba = vport->phba;
+	struct ls_rjt stat;
+	struct RTV_RSP *rtv_rsp;
+	uint8_t *pcmd;
+	struct lpfc_iocbq *elsiocb;
+	uint32_t cmdsize;
+	u32 ulp_context;
+
+	if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
+	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
+		/* reject the unsolicited RTV request and done with it */
+		goto reject_out;
+
+	cmdsize = sizeof(struct RTV_RSP) + sizeof(uint32_t);
+	elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
+				     lpfc_max_els_tries, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_ACC);
+
+	if (!elsiocb)
+		return 1;
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
+	pcmd += sizeof(uint32_t); /* Skip past command */
+
+	ulp_context = get_job_ulpcontext(phba, elsiocb);
+	/* use the command's xri in the response */
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
+		       get_job_ulpcontext(phba, cmdiocb));
+		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+		       get_job_rcvoxid(phba, cmdiocb));
+	} else {
+		icmd = &elsiocb->iocb;
+		icmd->ulpContext = get_job_ulpcontext(phba, cmdiocb);
+		icmd->unsli3.rcvsli3.ox_id = get_job_rcvoxid(phba, cmdiocb);
+	}
+
+	rtv_rsp = (struct RTV_RSP *)pcmd;
+
+	/* populate RTV payload */
+	rtv_rsp->ratov = cpu_to_be32(phba->fc_ratov * 1000); /* report msecs */
+	rtv_rsp->edtov = cpu_to_be32(phba->fc_edtov);
+	bf_set(qtov_edtovres, rtv_rsp, phba->fc_edtovResol ? 1 : 0);
+	bf_set(qtov_rttov, rtv_rsp, 0); /* Field is for FC ONLY */
+	rtv_rsp->qtov = cpu_to_be32(rtv_rsp->qtov);
+
+	/* Xmit ELS RLS ACC response tag <ulpIoTag> */
+	lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
+			 "2875 Xmit ELS RTV ACC response tag x%x xri x%x, "
+			 "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x, "
+			 "Data: x%x x%x x%x\n",
+			 elsiocb->iotag, ulp_context,
+			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
+			 ndlp->nlp_rpi,
+			rtv_rsp->ratov, rtv_rsp->edtov, rtv_rsp->qtov);
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+	phba->fc_stat.elsXmitACC++;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 0;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+	}
+	return 0;
+
+reject_out:
+	/* issue rejection response */
+	stat.un.b.lsRjtRsvd0 = 0;
+	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
+	stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
+	stat.un.b.vendorUnique = 0;
+	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
+	return 0;
+}
+
+/* lpfc_issue_els_rrq - Process an unsolicited rrq iocb
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @ndlp: pointer to a node-list data structure.
+ * @did: DID of the target.
+ * @rrq: Pointer to the rrq struct.
+ *
+ * Build a ELS RRQ command and send it to the target. If the issue_iocb is
+ * Successful the the completion handler will clear the RRQ.
+ *
+ * Return codes
+ *   0 - Successfully sent rrq els iocb.
+ *   1 - Failed to send rrq els iocb.
+ **/
+static int
+lpfc_issue_els_rrq(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
+			uint32_t did, struct lpfc_node_rrq *rrq)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	struct RRQ *els_rrq;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	uint16_t cmdsize;
+	int ret;
+
+	if (!ndlp)
+		return 1;
+
+	/* If ndlp is not NULL, we will bump the reference count on it */
+	cmdsize = (sizeof(uint32_t) + sizeof(struct RRQ));
+	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, did,
+				     ELS_CMD_RRQ);
+	if (!elsiocb)
+		return 1;
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+
+	/* For RRQ request, remainder of payload is Exchange IDs */
+	*((uint32_t *) (pcmd)) = ELS_CMD_RRQ;
+	pcmd += sizeof(uint32_t);
+	els_rrq = (struct RRQ *) pcmd;
+
+	bf_set(rrq_oxid, els_rrq, phba->sli4_hba.xri_ids[rrq->xritag]);
+	bf_set(rrq_rxid, els_rrq, rrq->rxid);
+	bf_set(rrq_did, els_rrq, vport->fc_myDID);
+	els_rrq->rrq = cpu_to_be32(els_rrq->rrq);
+	els_rrq->rrq_exchg = cpu_to_be32(els_rrq->rrq_exchg);
+
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"Issue RRQ:     did:x%x",
+		did, rrq->xritag, rrq->rxid);
+	elsiocb->context_un.rrq = rrq;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rrq;
+
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp)
+		goto io_err;
+
+	ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (ret == IOCB_ERROR) {
+		lpfc_nlp_put(ndlp);
+		goto io_err;
+	}
+	return 0;
+
+ io_err:
+	lpfc_els_free_iocb(phba, elsiocb);
+	return 1;
+}
+
+/**
+ * lpfc_send_rrq - Sends ELS RRQ if needed.
+ * @phba: pointer to lpfc hba data structure.
+ * @rrq: pointer to the active rrq.
+ *
+ * This routine will call the lpfc_issue_els_rrq if the rrq is
+ * still active for the xri. If this function returns a failure then
+ * the caller needs to clean up the RRQ by calling lpfc_clr_active_rrq.
+ *
+ * Returns 0 Success.
+ *         1 Failure.
+ **/
+int
+lpfc_send_rrq(struct lpfc_hba *phba, struct lpfc_node_rrq *rrq)
+{
+	struct lpfc_nodelist *ndlp = lpfc_findnode_did(rrq->vport,
+						       rrq->nlp_DID);
+	if (!ndlp)
+		return 1;
+
+	if (lpfc_test_rrq_active(phba, ndlp, rrq->xritag))
+		return lpfc_issue_els_rrq(rrq->vport, ndlp,
+					 rrq->nlp_DID, rrq);
+	else
+		return 1;
+}
+
+/**
+ * lpfc_els_rsp_rpl_acc - Issue an accept rpl els command
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdsize: size of the ELS command.
+ * @oldiocb: pointer to the original lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine issuees an Accept (ACC) Read Port List (RPL) ELS command.
+ * It is to be called by the lpfc_els_rcv_rpl() routine to accept the RPL.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the RPL Accept Response
+ * ELS command.
+ *
+ * Return code
+ *   0 - Successfully issued ACC RPL ELS command
+ *   1 - Failed to issue ACC RPL ELS command
+ **/
+static int
+lpfc_els_rsp_rpl_acc(struct lpfc_vport *vport, uint16_t cmdsize,
+		     struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
+{
+	int rc = 0;
+	struct lpfc_hba *phba = vport->phba;
+	IOCB_t *icmd;
+	union lpfc_wqe128 *wqe;
+	RPL_RSP rpl_rsp;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	u32 ulp_context;
+
+	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_ACC);
+
+	if (!elsiocb)
+		return 1;
+
+	ulp_context = get_job_ulpcontext(phba, elsiocb);
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		/* Xri / rx_id */
+		bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
+		       get_job_ulpcontext(phba, oldiocb));
+		bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
+		       get_job_rcvoxid(phba, oldiocb));
+	} else {
+		icmd = &elsiocb->iocb;
+		icmd->ulpContext = get_job_ulpcontext(phba, oldiocb);
+		icmd->unsli3.rcvsli3.ox_id = get_job_rcvoxid(phba, oldiocb);
+	}
+
+	pcmd = elsiocb->cmd_dmabuf->virt;
+	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
+	pcmd += sizeof(uint16_t);
+	*((uint16_t *)(pcmd)) = be16_to_cpu(cmdsize);
+	pcmd += sizeof(uint16_t);
+
+	/* Setup the RPL ACC payload */
+	rpl_rsp.listLen = be32_to_cpu(1);
+	rpl_rsp.index = 0;
+	rpl_rsp.port_num_blk.portNum = 0;
+	rpl_rsp.port_num_blk.portID = be32_to_cpu(vport->fc_myDID);
+	memcpy(&rpl_rsp.port_num_blk.portName, &vport->fc_portname,
+	    sizeof(struct lpfc_name));
+	memcpy(pcmd, &rpl_rsp, cmdsize - sizeof(uint32_t));
+	/* Xmit ELS RPL ACC response tag <ulpIoTag> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0120 Xmit ELS RPL ACC response tag x%x "
+			 "xri x%x, did x%x, nlp_flag x%x, nlp_state x%x, "
+			 "rpi x%x\n",
+			 elsiocb->iotag, ulp_context,
+			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
+			 ndlp->nlp_rpi);
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
+	phba->fc_stat.elsXmitACC++;
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		return 1;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return 1;
+	}
+
+	return 0;
+}
+
+/**
+ * lpfc_els_rcv_rpl - Process an unsolicited rpl iocb
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes Read Port List (RPL) IOCB received as an ELS
+ * unsolicited event. It first checks the remote port state. If the remote
+ * port is not in NLP_STE_UNMAPPED_NODE and NLP_STE_MAPPED_NODE states, it
+ * invokes the lpfc_els_rsp_reject() routine to send reject response.
+ * Otherwise, this routine then invokes the lpfc_els_rsp_rpl_acc() routine
+ * to accept the RPL.
+ *
+ * Return code
+ *   0 - Successfully processed rpl iocb (currently always return 0)
+ **/
+static int
+lpfc_els_rcv_rpl(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		 struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_dmabuf *pcmd;
+	uint32_t *lp;
+	uint32_t maxsize;
+	uint16_t cmdsize;
+	RPL *rpl;
+	struct ls_rjt stat;
+
+	if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
+	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
+		/* issue rejection response */
+		stat.un.b.lsRjtRsvd0 = 0;
+		stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
+		stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
+		stat.un.b.vendorUnique = 0;
+		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
+			NULL);
+		/* rejected the unsolicited RPL request and done with it */
+		return 0;
+	}
+
+	pcmd = cmdiocb->cmd_dmabuf;
+	lp = (uint32_t *) pcmd->virt;
+	rpl = (RPL *) (lp + 1);
+	maxsize = be32_to_cpu(rpl->maxsize);
+
+	/* We support only one port */
+	if ((rpl->index == 0) &&
+	    ((maxsize == 0) ||
+	     ((maxsize * sizeof(uint32_t)) >= sizeof(RPL_RSP)))) {
+		cmdsize = sizeof(uint32_t) + sizeof(RPL_RSP);
+	} else {
+		cmdsize = sizeof(uint32_t) + maxsize * sizeof(uint32_t);
+	}
+	lpfc_els_rsp_rpl_acc(vport, cmdsize, cmdiocb, ndlp);
+
+	return 0;
+}
+
+/**
+ * lpfc_els_rcv_farp - Process an unsolicited farp request els command
+ * @vport: pointer to a virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes Fibre Channel Address Resolution Protocol
+ * (FARP) Request IOCB received as an ELS unsolicited event. Currently,
+ * the lpfc driver only supports matching on WWPN or WWNN for FARP. As such,
+ * FARP_MATCH_PORT flag and FARP_MATCH_NODE flag are checked against the
+ * Match Flag in the FARP request IOCB: if FARP_MATCH_PORT flag is set, the
+ * remote PortName is compared against the FC PortName stored in the @vport
+ * data structure; if FARP_MATCH_NODE flag is set, the remote NodeName is
+ * compared against the FC NodeName stored in the @vport data structure.
+ * If any of these matches and the FARP_REQUEST_FARPR flag is set in the
+ * FARP request IOCB Response Flag, the lpfc_issue_els_farpr() routine is
+ * invoked to send out FARP Response to the remote node. Before sending the
+ * FARP Response, however, the FARP_REQUEST_PLOGI flag is check in the FARP
+ * request IOCB Response Flag and, if it is set, the lpfc_issue_els_plogi()
+ * routine is invoked to log into the remote port first.
+ *
+ * Return code
+ *   0 - Either the FARP Match Mode not supported or successfully processed
+ **/
+static int
+lpfc_els_rcv_farp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		  struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_dmabuf *pcmd;
+	uint32_t *lp;
+	FARP *fp;
+	uint32_t cnt, did;
+
+	did = get_job_els_rsp64_did(vport->phba, cmdiocb);
+	pcmd = cmdiocb->cmd_dmabuf;
+	lp = (uint32_t *) pcmd->virt;
+
+	lp++;
+	fp = (FARP *) lp;
+	/* FARP-REQ received from DID <did> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0601 FARP-REQ received from DID x%x\n", did);
+	/* We will only support match on WWPN or WWNN */
+	if (fp->Mflags & ~(FARP_MATCH_NODE | FARP_MATCH_PORT)) {
+		return 0;
+	}
+
+	cnt = 0;
+	/* If this FARP command is searching for my portname */
+	if (fp->Mflags & FARP_MATCH_PORT) {
+		if (memcmp(&fp->RportName, &vport->fc_portname,
+			   sizeof(struct lpfc_name)) == 0)
+			cnt = 1;
+	}
+
+	/* If this FARP command is searching for my nodename */
+	if (fp->Mflags & FARP_MATCH_NODE) {
+		if (memcmp(&fp->RnodeName, &vport->fc_nodename,
+			   sizeof(struct lpfc_name)) == 0)
+			cnt = 1;
+	}
+
+	if (cnt) {
+		if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
+		   (ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
+			/* Log back into the node before sending the FARP. */
+			if (fp->Rflags & FARP_REQUEST_PLOGI) {
+				ndlp->nlp_prev_state = ndlp->nlp_state;
+				lpfc_nlp_set_state(vport, ndlp,
+						   NLP_STE_PLOGI_ISSUE);
+				lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
+			}
+
+			/* Send a FARP response to that node */
+			if (fp->Rflags & FARP_REQUEST_FARPR)
+				lpfc_issue_els_farpr(vport, did, 0);
+		}
+	}
+	return 0;
+}
+
+/**
+ * lpfc_els_rcv_farpr - Process an unsolicited farp response iocb
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes Fibre Channel Address Resolution Protocol
+ * Response (FARPR) IOCB received as an ELS unsolicited event. It simply
+ * invokes the lpfc_els_rsp_acc() routine to the remote node to accept
+ * the FARP response request.
+ *
+ * Return code
+ *   0 - Successfully processed FARPR IOCB (currently always return 0)
+ **/
+static int
+lpfc_els_rcv_farpr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		   struct lpfc_nodelist  *ndlp)
+{
+	struct lpfc_dmabuf *pcmd;
+	uint32_t *lp;
+	uint32_t did;
+
+	did = get_job_els_rsp64_did(vport->phba, cmdiocb);
+	pcmd = cmdiocb->cmd_dmabuf;
+	lp = (uint32_t *)pcmd->virt;
+
+	lp++;
+	/* FARP-RSP received from DID <did> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0600 FARP-RSP received from DID x%x\n", did);
+	/* ACCEPT the Farp resp request */
+	lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
+
+	return 0;
+}
+
+/**
+ * lpfc_els_rcv_fan - Process an unsolicited fan iocb command
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @fan_ndlp: pointer to a node-list data structure.
+ *
+ * This routine processes a Fabric Address Notification (FAN) IOCB
+ * command received as an ELS unsolicited event. The FAN ELS command will
+ * only be processed on a physical port (i.e., the @vport represents the
+ * physical port). The fabric NodeName and PortName from the FAN IOCB are
+ * compared against those in the phba data structure. If any of those is
+ * different, the lpfc_initial_flogi() routine is invoked to initialize
+ * Fabric Login (FLOGI) to the fabric to start the discover over. Otherwise,
+ * if both of those are identical, the lpfc_issue_fabric_reglogin() routine
+ * is invoked to register login to the fabric.
+ *
+ * Return code
+ *   0 - Successfully processed fan iocb (currently always return 0).
+ **/
+static int
+lpfc_els_rcv_fan(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		 struct lpfc_nodelist *fan_ndlp)
+{
+	struct lpfc_hba *phba = vport->phba;
+	uint32_t *lp;
+	FAN *fp;
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS, "0265 FAN received\n");
+	lp = (uint32_t *)cmdiocb->cmd_dmabuf->virt;
+	fp = (FAN *) ++lp;
+	/* FAN received; Fan does not have a reply sequence */
+	if ((vport == phba->pport) &&
+	    (vport->port_state == LPFC_LOCAL_CFG_LINK)) {
+		if ((memcmp(&phba->fc_fabparam.nodeName, &fp->FnodeName,
+			    sizeof(struct lpfc_name))) ||
+		    (memcmp(&phba->fc_fabparam.portName, &fp->FportName,
+			    sizeof(struct lpfc_name)))) {
+			/* This port has switched fabrics. FLOGI is required */
+			lpfc_issue_init_vfi(vport);
+		} else {
+			/* FAN verified - skip FLOGI */
+			vport->fc_myDID = vport->fc_prevDID;
+			if (phba->sli_rev < LPFC_SLI_REV4)
+				lpfc_issue_fabric_reglogin(vport);
+			else {
+				lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+					"3138 Need register VFI: (x%x/%x)\n",
+					vport->fc_prevDID, vport->fc_myDID);
+				lpfc_issue_reg_vfi(vport);
+			}
+		}
+	}
+	return 0;
+}
+
+/**
+ * lpfc_els_rcv_edc - Process an unsolicited EDC iocb
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * Return code
+ *   0 - Successfully processed echo iocb (currently always return 0)
+ **/
+static int
+lpfc_els_rcv_edc(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
+		 struct lpfc_nodelist *ndlp)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	struct fc_els_edc *edc_req;
+	struct fc_tlv_desc *tlv;
+	uint8_t *payload;
+	uint32_t *ptr, dtag;
+	const char *dtag_nm;
+	int desc_cnt = 0, bytes_remain;
+	struct fc_diag_lnkflt_desc *plnkflt;
+
+	payload = cmdiocb->cmd_dmabuf->virt;
+
+	edc_req = (struct fc_els_edc *)payload;
+	bytes_remain = be32_to_cpu(edc_req->desc_len);
+
+	ptr = (uint32_t *)payload;
+	lpfc_printf_vlog(vport, KERN_INFO,
+			 LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
+			 "3319 Rcv EDC payload len %d: x%x x%x x%x\n",
+			 bytes_remain, be32_to_cpu(*ptr),
+			 be32_to_cpu(*(ptr + 1)), be32_to_cpu(*(ptr + 2)));
+
+	/* No signal support unless there is a congestion descriptor */
+	phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
+	phba->cgn_sig_freq = 0;
+	phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
+
+	if (bytes_remain <= 0)
+		goto out;
+
+	tlv = edc_req->desc;
+
+	/*
+	 * cycle through EDC diagnostic descriptors to find the
+	 * congestion signaling capability descriptor
+	 */
+	while (bytes_remain) {
+		if (bytes_remain < FC_TLV_DESC_HDR_SZ) {
+			lpfc_printf_log(phba, KERN_WARNING,
+					LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
+					"6464 Truncated TLV hdr on "
+					"Diagnostic descriptor[%d]\n",
+					desc_cnt);
+			goto out;
+		}
+
+		dtag = be32_to_cpu(tlv->desc_tag);
+		switch (dtag) {
+		case ELS_DTAG_LNK_FAULT_CAP:
+			if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
+			    FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
+				sizeof(struct fc_diag_lnkflt_desc)) {
+				lpfc_printf_log(phba, KERN_WARNING,
+					LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
+					"6465 Truncated Link Fault Diagnostic "
+					"descriptor[%d]: %d vs 0x%zx 0x%zx\n",
+					desc_cnt, bytes_remain,
+					FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
+					sizeof(struct fc_diag_lnkflt_desc));
+				goto out;
+			}
+			plnkflt = (struct fc_diag_lnkflt_desc *)tlv;
+			lpfc_printf_log(phba, KERN_INFO,
+				LOG_ELS | LOG_LDS_EVENT,
+				"4626 Link Fault Desc Data: x%08x len x%x "
+				"da x%x dd x%x interval x%x\n",
+				be32_to_cpu(plnkflt->desc_tag),
+				be32_to_cpu(plnkflt->desc_len),
+				be32_to_cpu(
+					plnkflt->degrade_activate_threshold),
+				be32_to_cpu(
+					plnkflt->degrade_deactivate_threshold),
+				be32_to_cpu(plnkflt->fec_degrade_interval));
+			break;
+		case ELS_DTAG_CG_SIGNAL_CAP:
+			if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
+			    FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
+				sizeof(struct fc_diag_cg_sig_desc)) {
+				lpfc_printf_log(
+					phba, KERN_WARNING, LOG_CGN_MGMT,
+					"6466 Truncated cgn signal Diagnostic "
+					"descriptor[%d]: %d vs 0x%zx 0x%zx\n",
+					desc_cnt, bytes_remain,
+					FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
+					sizeof(struct fc_diag_cg_sig_desc));
+				goto out;
+			}
+
+			phba->cgn_reg_fpin = phba->cgn_init_reg_fpin;
+			phba->cgn_reg_signal = phba->cgn_init_reg_signal;
+
+			/* We start negotiation with lpfc_fabric_cgn_frequency.
+			 * When we process the EDC, we will settle on the
+			 * higher frequency.
+			 */
+			phba->cgn_sig_freq = lpfc_fabric_cgn_frequency;
+
+			lpfc_least_capable_settings(
+				phba, (struct fc_diag_cg_sig_desc *)tlv);
+			break;
+		default:
+			dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
+			lpfc_printf_log(phba, KERN_WARNING,
+					LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
+					"6467 unknown Diagnostic "
+					"Descriptor[%d]: tag x%x (%s)\n",
+					desc_cnt, dtag, dtag_nm);
+		}
+		bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
+		tlv = fc_tlv_next_desc(tlv);
+		desc_cnt++;
+	}
+out:
+	/* Need to send back an ACC */
+	lpfc_issue_els_edc_rsp(vport, cmdiocb, ndlp);
+
+	lpfc_config_cgn_signal(phba);
+	return 0;
+}
+
+/**
+ * lpfc_els_timeout - Handler funciton to the els timer
+ * @t: timer context used to obtain the vport.
+ *
+ * This routine is invoked by the ELS timer after timeout. It posts the ELS
+ * timer timeout event by setting the WORKER_ELS_TMO bit to the work port
+ * event bitmap and then invokes the lpfc_worker_wake_up() routine to wake
+ * up the worker thread. It is for the worker thread to invoke the routine
+ * lpfc_els_timeout_handler() to work on the posted event WORKER_ELS_TMO.
+ **/
+void
+lpfc_els_timeout(struct timer_list *t)
+{
+	struct lpfc_vport *vport = from_timer(vport, t, els_tmofunc);
+	struct lpfc_hba   *phba = vport->phba;
+	uint32_t tmo_posted;
+	unsigned long iflag;
+
+	spin_lock_irqsave(&vport->work_port_lock, iflag);
+	tmo_posted = vport->work_port_events & WORKER_ELS_TMO;
+	if ((!tmo_posted) && (!(vport->load_flag & FC_UNLOADING)))
+		vport->work_port_events |= WORKER_ELS_TMO;
+	spin_unlock_irqrestore(&vport->work_port_lock, iflag);
+
+	if ((!tmo_posted) && (!(vport->load_flag & FC_UNLOADING)))
+		lpfc_worker_wake_up(phba);
+	return;
+}
+
+
+/**
+ * lpfc_els_timeout_handler - Process an els timeout event
+ * @vport: pointer to a virtual N_Port data structure.
+ *
+ * This routine is the actual handler function that processes an ELS timeout
+ * event. It walks the ELS ring to get and abort all the IOCBs (except the
+ * ABORT/CLOSE/FARP/FARPR/FDISC), which are associated with the @vport by
+ * invoking the lpfc_sli_issue_abort_iotag() routine.
+ **/
+void
+lpfc_els_timeout_handler(struct lpfc_vport *vport)
+{
+	struct lpfc_hba  *phba = vport->phba;
+	struct lpfc_sli_ring *pring;
+	struct lpfc_iocbq *tmp_iocb, *piocb;
+	IOCB_t *cmd = NULL;
+	struct lpfc_dmabuf *pcmd;
+	uint32_t els_command = 0;
+	uint32_t timeout;
+	uint32_t remote_ID = 0xffffffff;
+	LIST_HEAD(abort_list);
+	u32 ulp_command = 0, ulp_context = 0, did = 0, iotag = 0;
+
+
+	timeout = (uint32_t)(phba->fc_ratov << 1);
+
+	pring = lpfc_phba_elsring(phba);
+	if (unlikely(!pring))
+		return;
+
+	if (phba->pport->load_flag & FC_UNLOADING)
+		return;
+
+	spin_lock_irq(&phba->hbalock);
+	if (phba->sli_rev == LPFC_SLI_REV4)
+		spin_lock(&pring->ring_lock);
+
+	list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
+		ulp_command = get_job_cmnd(phba, piocb);
+		ulp_context = get_job_ulpcontext(phba, piocb);
+		did = get_job_els_rsp64_did(phba, piocb);
+
+		if (phba->sli_rev == LPFC_SLI_REV4) {
+			iotag = get_wqe_reqtag(piocb);
+		} else {
+			cmd = &piocb->iocb;
+			iotag = cmd->ulpIoTag;
+		}
+
+		if ((piocb->cmd_flag & LPFC_IO_LIBDFC) != 0 ||
+		    ulp_command == CMD_ABORT_XRI_CX ||
+		    ulp_command == CMD_ABORT_XRI_CN ||
+		    ulp_command == CMD_CLOSE_XRI_CN)
+			continue;
+
+		if (piocb->vport != vport)
+			continue;
+
+		pcmd = piocb->cmd_dmabuf;
+		if (pcmd)
+			els_command = *(uint32_t *) (pcmd->virt);
+
+		if (els_command == ELS_CMD_FARP ||
+		    els_command == ELS_CMD_FARPR ||
+		    els_command == ELS_CMD_FDISC)
+			continue;
+
+		if (piocb->drvrTimeout > 0) {
+			if (piocb->drvrTimeout >= timeout)
+				piocb->drvrTimeout -= timeout;
+			else
+				piocb->drvrTimeout = 0;
+			continue;
+		}
+
+		remote_ID = 0xffffffff;
+		if (ulp_command != CMD_GEN_REQUEST64_CR) {
+			remote_ID = did;
+		} else {
+			struct lpfc_nodelist *ndlp;
+			ndlp = __lpfc_findnode_rpi(vport, ulp_context);
+			if (ndlp)
+				remote_ID = ndlp->nlp_DID;
+		}
+		list_add_tail(&piocb->dlist, &abort_list);
+	}
+	if (phba->sli_rev == LPFC_SLI_REV4)
+		spin_unlock(&pring->ring_lock);
+	spin_unlock_irq(&phba->hbalock);
+
+	list_for_each_entry_safe(piocb, tmp_iocb, &abort_list, dlist) {
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+			 "0127 ELS timeout Data: x%x x%x x%x "
+			 "x%x\n", els_command,
+			 remote_ID, ulp_command, iotag);
+
+		spin_lock_irq(&phba->hbalock);
+		list_del_init(&piocb->dlist);
+		lpfc_sli_issue_abort_iotag(phba, pring, piocb, NULL);
+		spin_unlock_irq(&phba->hbalock);
+	}
+
+	/* Make sure HBA is alive */
+	lpfc_issue_hb_tmo(phba);
+
+	if (!list_empty(&pring->txcmplq))
+		if (!(phba->pport->load_flag & FC_UNLOADING))
+			mod_timer(&vport->els_tmofunc,
+				  jiffies + msecs_to_jiffies(1000 * timeout));
+}
+
+/**
+ * lpfc_els_flush_cmd - Clean up the outstanding els commands to a vport
+ * @vport: pointer to a host virtual N_Port data structure.
+ *
+ * This routine is used to clean up all the outstanding ELS commands on a
+ * @vport. It first aborts the @vport by invoking lpfc_fabric_abort_vport()
+ * routine. After that, it walks the ELS transmit queue to remove all the
+ * IOCBs with the @vport other than the QUE_RING and ABORT/CLOSE IOCBs. For
+ * the IOCBs with a non-NULL completion callback function, the callback
+ * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
+ * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs with a NULL completion
+ * callback function, the IOCB will simply be released. Finally, it walks
+ * the ELS transmit completion queue to issue an abort IOCB to any transmit
+ * completion queue IOCB that is associated with the @vport and is not
+ * an IOCB from libdfc (i.e., the management plane IOCBs that are not
+ * part of the discovery state machine) out to HBA by invoking the
+ * lpfc_sli_issue_abort_iotag() routine. Note that this function issues the
+ * abort IOCB to any transmit completion queueed IOCB, it does not guarantee
+ * the IOCBs are aborted when this function returns.
+ **/
+void
+lpfc_els_flush_cmd(struct lpfc_vport *vport)
+{
+	LIST_HEAD(abort_list);
+	LIST_HEAD(cancel_list);
+	struct lpfc_hba  *phba = vport->phba;
+	struct lpfc_sli_ring *pring;
+	struct lpfc_iocbq *tmp_iocb, *piocb;
+	u32 ulp_command;
+	unsigned long iflags = 0;
+	bool mbx_tmo_err;
+
+	lpfc_fabric_abort_vport(vport);
+
+	/*
+	 * For SLI3, only the hbalock is required.  But SLI4 needs to coordinate
+	 * with the ring insert operation.  Because lpfc_sli_issue_abort_iotag
+	 * ultimately grabs the ring_lock, the driver must splice the list into
+	 * a working list and release the locks before calling the abort.
+	 */
+	spin_lock_irqsave(&phba->hbalock, iflags);
+	pring = lpfc_phba_elsring(phba);
+
+	/* Bail out if we've no ELS wq, like in PCI error recovery case. */
+	if (unlikely(!pring)) {
+		spin_unlock_irqrestore(&phba->hbalock, iflags);
+		return;
+	}
+
+	if (phba->sli_rev == LPFC_SLI_REV4)
+		spin_lock(&pring->ring_lock);
+
+	mbx_tmo_err = test_bit(MBX_TMO_ERR, &phba->bit_flags);
+	/* First we need to issue aborts to outstanding cmds on txcmpl */
+	list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
+		if (piocb->cmd_flag & LPFC_IO_LIBDFC && !mbx_tmo_err)
+			continue;
+
+		if (piocb->vport != vport)
+			continue;
+
+		if (piocb->cmd_flag & LPFC_DRIVER_ABORTED && !mbx_tmo_err)
+			continue;
+
+		/* On the ELS ring we can have ELS_REQUESTs or
+		 * GEN_REQUESTs waiting for a response.
+		 */
+		ulp_command = get_job_cmnd(phba, piocb);
+		if (ulp_command == CMD_ELS_REQUEST64_CR) {
+			list_add_tail(&piocb->dlist, &abort_list);
+
+			/* If the link is down when flushing ELS commands
+			 * the firmware will not complete them till after
+			 * the link comes back up. This may confuse
+			 * discovery for the new link up, so we need to
+			 * change the compl routine to just clean up the iocb
+			 * and avoid any retry logic.
+			 */
+			if (phba->link_state == LPFC_LINK_DOWN)
+				piocb->cmd_cmpl = lpfc_cmpl_els_link_down;
+		} else if (ulp_command == CMD_GEN_REQUEST64_CR ||
+			   mbx_tmo_err)
+			list_add_tail(&piocb->dlist, &abort_list);
+	}
+
+	if (phba->sli_rev == LPFC_SLI_REV4)
+		spin_unlock(&pring->ring_lock);
+	spin_unlock_irqrestore(&phba->hbalock, iflags);
+
+	/* Abort each txcmpl iocb on aborted list and remove the dlist links. */
+	list_for_each_entry_safe(piocb, tmp_iocb, &abort_list, dlist) {
+		spin_lock_irqsave(&phba->hbalock, iflags);
+		list_del_init(&piocb->dlist);
+		if (mbx_tmo_err)
+			list_move_tail(&piocb->list, &cancel_list);
+		else
+			lpfc_sli_issue_abort_iotag(phba, pring, piocb, NULL);
+
+		spin_unlock_irqrestore(&phba->hbalock, iflags);
+	}
+	if (!list_empty(&cancel_list))
+		lpfc_sli_cancel_iocbs(phba, &cancel_list, IOSTAT_LOCAL_REJECT,
+				      IOERR_SLI_ABORTED);
+	else
+		/* Make sure HBA is alive */
+		lpfc_issue_hb_tmo(phba);
+
+	if (!list_empty(&abort_list))
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				 "3387 abort list for txq not empty\n");
+	INIT_LIST_HEAD(&abort_list);
+
+	spin_lock_irqsave(&phba->hbalock, iflags);
+	if (phba->sli_rev == LPFC_SLI_REV4)
+		spin_lock(&pring->ring_lock);
+
+	/* No need to abort the txq list,
+	 * just queue them up for lpfc_sli_cancel_iocbs
+	 */
+	list_for_each_entry_safe(piocb, tmp_iocb, &pring->txq, list) {
+		ulp_command = get_job_cmnd(phba, piocb);
+
+		if (piocb->cmd_flag & LPFC_IO_LIBDFC)
+			continue;
+
+		/* Do not flush out the QUE_RING and ABORT/CLOSE iocbs */
+		if (ulp_command == CMD_QUE_RING_BUF_CN ||
+		    ulp_command == CMD_QUE_RING_BUF64_CN ||
+		    ulp_command == CMD_CLOSE_XRI_CN ||
+		    ulp_command == CMD_ABORT_XRI_CN ||
+		    ulp_command == CMD_ABORT_XRI_CX)
+			continue;
+
+		if (piocb->vport != vport)
+			continue;
+
+		list_del_init(&piocb->list);
+		list_add_tail(&piocb->list, &abort_list);
+	}
+
+	/* The same holds true for any FLOGI/FDISC on the fabric_iocb_list */
+	if (vport == phba->pport) {
+		list_for_each_entry_safe(piocb, tmp_iocb,
+					 &phba->fabric_iocb_list, list) {
+			list_del_init(&piocb->list);
+			list_add_tail(&piocb->list, &abort_list);
+		}
+	}
+
+	if (phba->sli_rev == LPFC_SLI_REV4)
+		spin_unlock(&pring->ring_lock);
+	spin_unlock_irqrestore(&phba->hbalock, iflags);
+
+	/* Cancel all the IOCBs from the completions list */
+	lpfc_sli_cancel_iocbs(phba, &abort_list,
+			      IOSTAT_LOCAL_REJECT, IOERR_SLI_ABORTED);
+
+	return;
+}
+
+/**
+ * lpfc_els_flush_all_cmd - Clean up all the outstanding els commands to a HBA
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine is used to clean up all the outstanding ELS commands on a
+ * @phba. It first aborts the @phba by invoking the lpfc_fabric_abort_hba()
+ * routine. After that, it walks the ELS transmit queue to remove all the
+ * IOCBs to the @phba other than the QUE_RING and ABORT/CLOSE IOCBs. For
+ * the IOCBs with the completion callback function associated, the callback
+ * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
+ * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs without the completion
+ * callback function associated, the IOCB will simply be released. Finally,
+ * it walks the ELS transmit completion queue to issue an abort IOCB to any
+ * transmit completion queue IOCB that is not an IOCB from libdfc (i.e., the
+ * management plane IOCBs that are not part of the discovery state machine)
+ * out to HBA by invoking the lpfc_sli_issue_abort_iotag() routine.
+ **/
+void
+lpfc_els_flush_all_cmd(struct lpfc_hba  *phba)
+{
+	struct lpfc_vport *vport;
+
+	spin_lock_irq(&phba->port_list_lock);
+	list_for_each_entry(vport, &phba->port_list, listentry)
+		lpfc_els_flush_cmd(vport);
+	spin_unlock_irq(&phba->port_list_lock);
+
+	return;
+}
+
+/**
+ * lpfc_send_els_failure_event - Posts an ELS command failure event
+ * @phba: Pointer to hba context object.
+ * @cmdiocbp: Pointer to command iocb which reported error.
+ * @rspiocbp: Pointer to response iocb which reported error.
+ *
+ * This function sends an event when there is an ELS command
+ * failure.
+ **/
+void
+lpfc_send_els_failure_event(struct lpfc_hba *phba,
+			struct lpfc_iocbq *cmdiocbp,
+			struct lpfc_iocbq *rspiocbp)
+{
+	struct lpfc_vport *vport = cmdiocbp->vport;
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_lsrjt_event lsrjt_event;
+	struct lpfc_fabric_event_header fabric_event;
+	struct ls_rjt stat;
+	struct lpfc_nodelist *ndlp;
+	uint32_t *pcmd;
+	u32 ulp_status, ulp_word4;
+
+	ndlp = cmdiocbp->ndlp;
+	if (!ndlp)
+		return;
+
+	ulp_status = get_job_ulpstatus(phba, rspiocbp);
+	ulp_word4 = get_job_word4(phba, rspiocbp);
+
+	if (ulp_status == IOSTAT_LS_RJT) {
+		lsrjt_event.header.event_type = FC_REG_ELS_EVENT;
+		lsrjt_event.header.subcategory = LPFC_EVENT_LSRJT_RCV;
+		memcpy(lsrjt_event.header.wwpn, &ndlp->nlp_portname,
+			sizeof(struct lpfc_name));
+		memcpy(lsrjt_event.header.wwnn, &ndlp->nlp_nodename,
+			sizeof(struct lpfc_name));
+		pcmd = (uint32_t *)cmdiocbp->cmd_dmabuf->virt;
+		lsrjt_event.command = (pcmd != NULL) ? *pcmd : 0;
+		stat.un.ls_rjt_error_be = cpu_to_be32(ulp_word4);
+		lsrjt_event.reason_code = stat.un.b.lsRjtRsnCode;
+		lsrjt_event.explanation = stat.un.b.lsRjtRsnCodeExp;
+		fc_host_post_vendor_event(shost,
+			fc_get_event_number(),
+			sizeof(lsrjt_event),
+			(char *)&lsrjt_event,
+			LPFC_NL_VENDOR_ID);
+		return;
+	}
+	if (ulp_status == IOSTAT_NPORT_BSY ||
+	    ulp_status == IOSTAT_FABRIC_BSY) {
+		fabric_event.event_type = FC_REG_FABRIC_EVENT;
+		if (ulp_status == IOSTAT_NPORT_BSY)
+			fabric_event.subcategory = LPFC_EVENT_PORT_BUSY;
+		else
+			fabric_event.subcategory = LPFC_EVENT_FABRIC_BUSY;
+		memcpy(fabric_event.wwpn, &ndlp->nlp_portname,
+			sizeof(struct lpfc_name));
+		memcpy(fabric_event.wwnn, &ndlp->nlp_nodename,
+			sizeof(struct lpfc_name));
+		fc_host_post_vendor_event(shost,
+			fc_get_event_number(),
+			sizeof(fabric_event),
+			(char *)&fabric_event,
+			LPFC_NL_VENDOR_ID);
+		return;
+	}
+
+}
+
+/**
+ * lpfc_send_els_event - Posts unsolicited els event
+ * @vport: Pointer to vport object.
+ * @ndlp: Pointer FC node object.
+ * @payload: ELS command code type.
+ *
+ * This function posts an event when there is an incoming
+ * unsolicited ELS command.
+ **/
+static void
+lpfc_send_els_event(struct lpfc_vport *vport,
+		    struct lpfc_nodelist *ndlp,
+		    uint32_t *payload)
+{
+	struct lpfc_els_event_header *els_data = NULL;
+	struct lpfc_logo_event *logo_data = NULL;
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+
+	if (*payload == ELS_CMD_LOGO) {
+		logo_data = kmalloc(sizeof(struct lpfc_logo_event), GFP_KERNEL);
+		if (!logo_data) {
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				"0148 Failed to allocate memory "
+				"for LOGO event\n");
+			return;
+		}
+		els_data = &logo_data->header;
+	} else {
+		els_data = kmalloc(sizeof(struct lpfc_els_event_header),
+			GFP_KERNEL);
+		if (!els_data) {
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				"0149 Failed to allocate memory "
+				"for ELS event\n");
+			return;
+		}
+	}
+	els_data->event_type = FC_REG_ELS_EVENT;
+	switch (*payload) {
+	case ELS_CMD_PLOGI:
+		els_data->subcategory = LPFC_EVENT_PLOGI_RCV;
+		break;
+	case ELS_CMD_PRLO:
+		els_data->subcategory = LPFC_EVENT_PRLO_RCV;
+		break;
+	case ELS_CMD_ADISC:
+		els_data->subcategory = LPFC_EVENT_ADISC_RCV;
+		break;
+	case ELS_CMD_LOGO:
+		els_data->subcategory = LPFC_EVENT_LOGO_RCV;
+		/* Copy the WWPN in the LOGO payload */
+		memcpy(logo_data->logo_wwpn, &payload[2],
+			sizeof(struct lpfc_name));
+		break;
+	default:
+		kfree(els_data);
+		return;
+	}
+	memcpy(els_data->wwpn, &ndlp->nlp_portname, sizeof(struct lpfc_name));
+	memcpy(els_data->wwnn, &ndlp->nlp_nodename, sizeof(struct lpfc_name));
+	if (*payload == ELS_CMD_LOGO) {
+		fc_host_post_vendor_event(shost,
+			fc_get_event_number(),
+			sizeof(struct lpfc_logo_event),
+			(char *)logo_data,
+			LPFC_NL_VENDOR_ID);
+		kfree(logo_data);
+	} else {
+		fc_host_post_vendor_event(shost,
+			fc_get_event_number(),
+			sizeof(struct lpfc_els_event_header),
+			(char *)els_data,
+			LPFC_NL_VENDOR_ID);
+		kfree(els_data);
+	}
+
+	return;
+}
+
+
+DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_li_event_nm, fc_fpin_li_event_types,
+			FC_FPIN_LI_EVT_TYPES_INIT);
+
+DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_deli_event_nm, fc_fpin_deli_event_types,
+			FC_FPIN_DELI_EVT_TYPES_INIT);
+
+DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_congn_event_nm, fc_fpin_congn_event_types,
+			FC_FPIN_CONGN_EVT_TYPES_INIT);
+
+DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_congn_severity_nm,
+			fc_fpin_congn_severity_types,
+			FC_FPIN_CONGN_SEVERITY_INIT);
+
+
+/**
+ * lpfc_display_fpin_wwpn - Display WWPNs accessible by the attached port
+ * @phba: Pointer to phba object.
+ * @wwnlist: Pointer to list of WWPNs in FPIN payload
+ * @cnt: count of WWPNs in FPIN payload
+ *
+ * This routine is called by LI and PC descriptors.
+ * Limit the number of WWPNs displayed to 6 log messages, 6 per log message
+ */
+static void
+lpfc_display_fpin_wwpn(struct lpfc_hba *phba, __be64 *wwnlist, u32 cnt)
+{
+	char buf[LPFC_FPIN_WWPN_LINE_SZ];
+	__be64 wwn;
+	u64 wwpn;
+	int i, len;
+	int line = 0;
+	int wcnt = 0;
+	bool endit = false;
+
+	len = scnprintf(buf, LPFC_FPIN_WWPN_LINE_SZ, "Accessible WWPNs:");
+	for (i = 0; i < cnt; i++) {
+		/* Are we on the last WWPN */
+		if (i == (cnt - 1))
+			endit = true;
+
+		/* Extract the next WWPN from the payload */
+		wwn = *wwnlist++;
+		wwpn = be64_to_cpu(wwn);
+		len += scnprintf(buf + len, LPFC_FPIN_WWPN_LINE_SZ - len,
+				 " %016llx", wwpn);
+
+		/* Log a message if we are on the last WWPN
+		 * or if we hit the max allowed per message.
+		 */
+		wcnt++;
+		if (wcnt == LPFC_FPIN_WWPN_LINE_CNT || endit) {
+			buf[len] = 0;
+			lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
+					"4686 %s\n", buf);
+
+			/* Check if we reached the last WWPN */
+			if (endit)
+				return;
+
+			/* Limit the number of log message displayed per FPIN */
+			line++;
+			if (line == LPFC_FPIN_WWPN_NUM_LINE) {
+				lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
+						"4687 %d WWPNs Truncated\n",
+						cnt - i - 1);
+				return;
+			}
+
+			/* Start over with next log message */
+			wcnt = 0;
+			len = scnprintf(buf, LPFC_FPIN_WWPN_LINE_SZ,
+					"Additional WWPNs:");
+		}
+	}
+}
+
+/**
+ * lpfc_els_rcv_fpin_li - Process an FPIN Link Integrity Event.
+ * @phba: Pointer to phba object.
+ * @tlv:  Pointer to the Link Integrity Notification Descriptor.
+ *
+ * This function processes a Link Integrity FPIN event by logging a message.
+ **/
+static void
+lpfc_els_rcv_fpin_li(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
+{
+	struct fc_fn_li_desc *li = (struct fc_fn_li_desc *)tlv;
+	const char *li_evt_str;
+	u32 li_evt, cnt;
+
+	li_evt = be16_to_cpu(li->event_type);
+	li_evt_str = lpfc_get_fpin_li_event_nm(li_evt);
+	cnt = be32_to_cpu(li->pname_count);
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
+			"4680 FPIN Link Integrity %s (x%x) "
+			"Detecting PN x%016llx Attached PN x%016llx "
+			"Duration %d mSecs Count %d Port Cnt %d\n",
+			li_evt_str, li_evt,
+			be64_to_cpu(li->detecting_wwpn),
+			be64_to_cpu(li->attached_wwpn),
+			be32_to_cpu(li->event_threshold),
+			be32_to_cpu(li->event_count), cnt);
+
+	lpfc_display_fpin_wwpn(phba, (__be64 *)&li->pname_list, cnt);
+}
+
+/**
+ * lpfc_els_rcv_fpin_del - Process an FPIN Delivery Event.
+ * @phba: Pointer to hba object.
+ * @tlv:  Pointer to the Delivery Notification Descriptor TLV
+ *
+ * This function processes a Delivery FPIN event by logging a message.
+ **/
+static void
+lpfc_els_rcv_fpin_del(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
+{
+	struct fc_fn_deli_desc *del = (struct fc_fn_deli_desc *)tlv;
+	const char *del_rsn_str;
+	u32 del_rsn;
+	__be32 *frame;
+
+	del_rsn = be16_to_cpu(del->deli_reason_code);
+	del_rsn_str = lpfc_get_fpin_deli_event_nm(del_rsn);
+
+	/* Skip over desc_tag/desc_len header to payload */
+	frame = (__be32 *)(del + 1);
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
+			"4681 FPIN Delivery %s (x%x) "
+			"Detecting PN x%016llx Attached PN x%016llx "
+			"DiscHdr0  x%08x "
+			"DiscHdr1 x%08x DiscHdr2 x%08x DiscHdr3 x%08x "
+			"DiscHdr4 x%08x DiscHdr5 x%08x\n",
+			del_rsn_str, del_rsn,
+			be64_to_cpu(del->detecting_wwpn),
+			be64_to_cpu(del->attached_wwpn),
+			be32_to_cpu(frame[0]),
+			be32_to_cpu(frame[1]),
+			be32_to_cpu(frame[2]),
+			be32_to_cpu(frame[3]),
+			be32_to_cpu(frame[4]),
+			be32_to_cpu(frame[5]));
+}
+
+/**
+ * lpfc_els_rcv_fpin_peer_cgn - Process a FPIN Peer Congestion Event.
+ * @phba: Pointer to hba object.
+ * @tlv:  Pointer to the Peer Congestion Notification Descriptor TLV
+ *
+ * This function processes a Peer Congestion FPIN event by logging a message.
+ **/
+static void
+lpfc_els_rcv_fpin_peer_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
+{
+	struct fc_fn_peer_congn_desc *pc = (struct fc_fn_peer_congn_desc *)tlv;
+	const char *pc_evt_str;
+	u32 pc_evt, cnt;
+
+	pc_evt = be16_to_cpu(pc->event_type);
+	pc_evt_str = lpfc_get_fpin_congn_event_nm(pc_evt);
+	cnt = be32_to_cpu(pc->pname_count);
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT | LOG_ELS,
+			"4684 FPIN Peer Congestion %s (x%x) "
+			"Duration %d mSecs "
+			"Detecting PN x%016llx Attached PN x%016llx "
+			"Impacted Port Cnt %d\n",
+			pc_evt_str, pc_evt,
+			be32_to_cpu(pc->event_period),
+			be64_to_cpu(pc->detecting_wwpn),
+			be64_to_cpu(pc->attached_wwpn),
+			cnt);
+
+	lpfc_display_fpin_wwpn(phba, (__be64 *)&pc->pname_list, cnt);
+}
+
+/**
+ * lpfc_els_rcv_fpin_cgn - Process an FPIN Congestion notification
+ * @phba: Pointer to hba object.
+ * @tlv:  Pointer to the Congestion Notification Descriptor TLV
+ *
+ * This function processes an FPIN Congestion Notifiction.  The notification
+ * could be an Alarm or Warning.  This routine feeds that data into driver's
+ * running congestion algorithm. It also processes the FPIN by
+ * logging a message. It returns 1 to indicate deliver this message
+ * to the upper layer or 0 to indicate don't deliver it.
+ **/
+static int
+lpfc_els_rcv_fpin_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
+{
+	struct lpfc_cgn_info *cp;
+	struct fc_fn_congn_desc *cgn = (struct fc_fn_congn_desc *)tlv;
+	const char *cgn_evt_str;
+	u32 cgn_evt;
+	const char *cgn_sev_str;
+	u32 cgn_sev;
+	uint16_t value;
+	u32 crc;
+	bool nm_log = false;
+	int rc = 1;
+
+	cgn_evt = be16_to_cpu(cgn->event_type);
+	cgn_evt_str = lpfc_get_fpin_congn_event_nm(cgn_evt);
+	cgn_sev = cgn->severity;
+	cgn_sev_str = lpfc_get_fpin_congn_severity_nm(cgn_sev);
+
+	/* The driver only takes action on a Credit Stall or Oversubscription
+	 * event type to engage the IO algorithm.  The driver prints an
+	 * unmaskable message only for Lost Credit and Credit Stall.
+	 * TODO: Still need to have definition of host action on clear,
+	 *       lost credit and device specific event types.
+	 */
+	switch (cgn_evt) {
+	case FPIN_CONGN_LOST_CREDIT:
+		nm_log = true;
+		break;
+	case FPIN_CONGN_CREDIT_STALL:
+		nm_log = true;
+		fallthrough;
+	case FPIN_CONGN_OVERSUBSCRIPTION:
+		if (cgn_evt == FPIN_CONGN_OVERSUBSCRIPTION)
+			nm_log = false;
+		switch (cgn_sev) {
+		case FPIN_CONGN_SEVERITY_ERROR:
+			/* Take action here for an Alarm event */
+			if (phba->cmf_active_mode != LPFC_CFG_OFF) {
+				if (phba->cgn_reg_fpin & LPFC_CGN_FPIN_ALARM) {
+					/* Track of alarm cnt for SYNC_WQE */
+					atomic_inc(&phba->cgn_sync_alarm_cnt);
+				}
+				/* Track alarm cnt for cgn_info regardless
+				 * of whether CMF is configured for Signals
+				 * or FPINs.
+				 */
+				atomic_inc(&phba->cgn_fabric_alarm_cnt);
+				goto cleanup;
+			}
+			break;
+		case FPIN_CONGN_SEVERITY_WARNING:
+			/* Take action here for a Warning event */
+			if (phba->cmf_active_mode != LPFC_CFG_OFF) {
+				if (phba->cgn_reg_fpin & LPFC_CGN_FPIN_WARN) {
+					/* Track of warning cnt for SYNC_WQE */
+					atomic_inc(&phba->cgn_sync_warn_cnt);
+				}
+				/* Track warning cnt and freq for cgn_info
+				 * regardless of whether CMF is configured for
+				 * Signals or FPINs.
+				 */
+				atomic_inc(&phba->cgn_fabric_warn_cnt);
+cleanup:
+				/* Save frequency in ms */
+				phba->cgn_fpin_frequency =
+					be32_to_cpu(cgn->event_period);
+				value = phba->cgn_fpin_frequency;
+				if (phba->cgn_i) {
+					cp = (struct lpfc_cgn_info *)
+						phba->cgn_i->virt;
+					cp->cgn_alarm_freq =
+						cpu_to_le16(value);
+					cp->cgn_warn_freq =
+						cpu_to_le16(value);
+					crc = lpfc_cgn_calc_crc32
+						(cp,
+						LPFC_CGN_INFO_SZ,
+						LPFC_CGN_CRC32_SEED);
+					cp->cgn_info_crc = cpu_to_le32(crc);
+				}
+
+				/* Don't deliver to upper layer since
+				 * driver took action on this tlv.
+				 */
+				rc = 0;
+			}
+			break;
+		}
+		break;
+	}
+
+	/* Change the log level to unmaskable for the following event types. */
+	lpfc_printf_log(phba, (nm_log ? KERN_WARNING : KERN_INFO),
+			LOG_CGN_MGMT | LOG_ELS,
+			"4683 FPIN CONGESTION %s type %s (x%x) Event "
+			"Duration %d mSecs\n",
+			cgn_sev_str, cgn_evt_str, cgn_evt,
+			be32_to_cpu(cgn->event_period));
+	return rc;
+}
+
+void
+lpfc_els_rcv_fpin(struct lpfc_vport *vport, void *p, u32 fpin_length)
+{
+	struct lpfc_hba *phba = vport->phba;
+	struct fc_els_fpin *fpin = (struct fc_els_fpin *)p;
+	struct fc_tlv_desc *tlv, *first_tlv, *current_tlv;
+	const char *dtag_nm;
+	int desc_cnt = 0, bytes_remain, cnt;
+	u32 dtag, deliver = 0;
+	int len;
+
+	/* FPINs handled only if we are in the right discovery state */
+	if (vport->port_state < LPFC_DISC_AUTH)
+		return;
+
+	/* make sure there is the full fpin header */
+	if (fpin_length < sizeof(struct fc_els_fpin))
+		return;
+
+	/* Sanity check descriptor length. The desc_len value does not
+	 * include space for the ELS command and the desc_len fields.
+	 */
+	len = be32_to_cpu(fpin->desc_len);
+	if (fpin_length < len + sizeof(struct fc_els_fpin)) {
+		lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
+				"4671 Bad ELS FPIN length %d: %d\n",
+				len, fpin_length);
+		return;
+	}
+
+	tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0];
+	first_tlv = tlv;
+	bytes_remain = fpin_length - offsetof(struct fc_els_fpin, fpin_desc);
+	bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len));
+
+	/* process each descriptor separately */
+	while (bytes_remain >= FC_TLV_DESC_HDR_SZ &&
+	       bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) {
+		dtag = be32_to_cpu(tlv->desc_tag);
+		switch (dtag) {
+		case ELS_DTAG_LNK_INTEGRITY:
+			lpfc_els_rcv_fpin_li(phba, tlv);
+			deliver = 1;
+			break;
+		case ELS_DTAG_DELIVERY:
+			lpfc_els_rcv_fpin_del(phba, tlv);
+			deliver = 1;
+			break;
+		case ELS_DTAG_PEER_CONGEST:
+			lpfc_els_rcv_fpin_peer_cgn(phba, tlv);
+			deliver = 1;
+			break;
+		case ELS_DTAG_CONGESTION:
+			deliver = lpfc_els_rcv_fpin_cgn(phba, tlv);
+			break;
+		default:
+			dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
+			lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
+					"4678 unknown FPIN descriptor[%d]: "
+					"tag x%x (%s)\n",
+					desc_cnt, dtag, dtag_nm);
+
+			/* If descriptor is bad, drop the rest of the data */
+			return;
+		}
+		lpfc_cgn_update_stat(phba, dtag);
+		cnt = be32_to_cpu(tlv->desc_len);
+
+		/* Sanity check descriptor length. The desc_len value does not
+		 * include space for the desc_tag and the desc_len fields.
+		 */
+		len -= (cnt + sizeof(struct fc_tlv_desc));
+		if (len < 0) {
+			dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
+			lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
+					"4672 Bad FPIN descriptor TLV length "
+					"%d: %d %d %s\n",
+					cnt, len, fpin_length, dtag_nm);
+			return;
+		}
+
+		current_tlv = tlv;
+		bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
+		tlv = fc_tlv_next_desc(tlv);
+
+		/* Format payload such that the FPIN delivered to the
+		 * upper layer is a single descriptor FPIN.
+		 */
+		if (desc_cnt)
+			memcpy(first_tlv, current_tlv,
+			       (cnt + sizeof(struct fc_els_fpin)));
+
+		/* Adjust the length so that it only reflects a
+		 * single descriptor FPIN.
+		 */
+		fpin_length = cnt + sizeof(struct fc_els_fpin);
+		fpin->desc_len = cpu_to_be32(fpin_length);
+		fpin_length += sizeof(struct fc_els_fpin); /* the entire FPIN */
+
+		/* Send every descriptor individually to the upper layer */
+		if (deliver)
+			fc_host_fpin_rcv(lpfc_shost_from_vport(vport),
+					 fpin_length, (char *)fpin);
+		desc_cnt++;
+	}
+}
+
+/**
+ * lpfc_els_unsol_buffer - Process an unsolicited event data buffer
+ * @phba: pointer to lpfc hba data structure.
+ * @pring: pointer to a SLI ring.
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @elsiocb: pointer to lpfc els command iocb data structure.
+ *
+ * This routine is used for processing the IOCB associated with a unsolicited
+ * event. It first determines whether there is an existing ndlp that matches
+ * the DID from the unsolicited IOCB. If not, it will create a new one with
+ * the DID from the unsolicited IOCB. The ELS command from the unsolicited
+ * IOCB is then used to invoke the proper routine and to set up proper state
+ * of the discovery state machine.
+ **/
+static void
+lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
+		      struct lpfc_vport *vport, struct lpfc_iocbq *elsiocb)
+{
+	struct lpfc_nodelist *ndlp;
+	struct ls_rjt stat;
+	u32 *payload, payload_len;
+	u32 cmd = 0, did = 0, newnode, status = 0;
+	uint8_t rjt_exp, rjt_err = 0, init_link = 0;
+	struct lpfc_wcqe_complete *wcqe_cmpl = NULL;
+	LPFC_MBOXQ_t *mbox;
+
+	if (!vport || !elsiocb->cmd_dmabuf)
+		goto dropit;
+
+	newnode = 0;
+	wcqe_cmpl = &elsiocb->wcqe_cmpl;
+	payload = elsiocb->cmd_dmabuf->virt;
+	if (phba->sli_rev == LPFC_SLI_REV4)
+		payload_len = wcqe_cmpl->total_data_placed;
+	else
+		payload_len = elsiocb->iocb.unsli3.rcvsli3.acc_len;
+	status = get_job_ulpstatus(phba, elsiocb);
+	cmd = *payload;
+	if ((phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) == 0)
+		lpfc_sli3_post_buffer(phba, pring, 1);
+
+	did = get_job_els_rsp64_did(phba, elsiocb);
+	if (status) {
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV Unsol ELS:  status:x%x/x%x did:x%x",
+			status, get_job_word4(phba, elsiocb), did);
+		goto dropit;
+	}
+
+	/* Check to see if link went down during discovery */
+	if (lpfc_els_chk_latt(vport))
+		goto dropit;
+
+	/* Ignore traffic received during vport shutdown. */
+	if (vport->load_flag & FC_UNLOADING)
+		goto dropit;
+
+	/* If NPort discovery is delayed drop incoming ELS */
+	if ((vport->fc_flag & FC_DISC_DELAYED) &&
+			(cmd != ELS_CMD_PLOGI))
+		goto dropit;
+
+	ndlp = lpfc_findnode_did(vport, did);
+	if (!ndlp) {
+		/* Cannot find existing Fabric ndlp, so allocate a new one */
+		ndlp = lpfc_nlp_init(vport, did);
+		if (!ndlp)
+			goto dropit;
+		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
+		newnode = 1;
+		if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
+			ndlp->nlp_type |= NLP_FABRIC;
+	} else if (ndlp->nlp_state == NLP_STE_UNUSED_NODE) {
+		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
+		newnode = 1;
+	}
+
+	phba->fc_stat.elsRcvFrame++;
+
+	/*
+	 * Do not process any unsolicited ELS commands
+	 * if the ndlp is in DEV_LOSS
+	 */
+	spin_lock_irq(&ndlp->lock);
+	if (ndlp->nlp_flag & NLP_IN_DEV_LOSS) {
+		spin_unlock_irq(&ndlp->lock);
+		if (newnode)
+			lpfc_nlp_put(ndlp);
+		goto dropit;
+	}
+	spin_unlock_irq(&ndlp->lock);
+
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp)
+		goto dropit;
+	elsiocb->vport = vport;
+
+	if ((cmd & ELS_CMD_MASK) == ELS_CMD_RSCN) {
+		cmd &= ELS_CMD_MASK;
+	}
+	/* ELS command <elsCmd> received from NPORT <did> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0112 ELS command x%x received from NPORT x%x "
+			 "refcnt %d Data: x%x x%x x%x x%x\n",
+			 cmd, did, kref_read(&ndlp->kref), vport->port_state,
+			 vport->fc_flag, vport->fc_myDID, vport->fc_prevDID);
+
+	/* reject till our FLOGI completes or PLOGI assigned DID via PT2PT */
+	if ((vport->port_state < LPFC_FABRIC_CFG_LINK) &&
+	    (cmd != ELS_CMD_FLOGI) &&
+	    !((cmd == ELS_CMD_PLOGI) && (vport->fc_flag & FC_PT2PT))) {
+		rjt_err = LSRJT_LOGICAL_BSY;
+		rjt_exp = LSEXP_NOTHING_MORE;
+		goto lsrjt;
+	}
+
+	switch (cmd) {
+	case ELS_CMD_PLOGI:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV PLOGI:       did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvPLOGI++;
+		ndlp = lpfc_plogi_confirm_nport(phba, payload, ndlp);
+		if (phba->sli_rev == LPFC_SLI_REV4 &&
+		    (phba->pport->fc_flag & FC_PT2PT)) {
+			vport->fc_prevDID = vport->fc_myDID;
+			/* Our DID needs to be updated before registering
+			 * the vfi. This is done in lpfc_rcv_plogi but
+			 * that is called after the reg_vfi.
+			 */
+			vport->fc_myDID =
+				bf_get(els_rsp64_sid,
+				       &elsiocb->wqe.xmit_els_rsp);
+			lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+					 "3312 Remote port assigned DID x%x "
+					 "%x\n", vport->fc_myDID,
+					 vport->fc_prevDID);
+		}
+
+		lpfc_send_els_event(vport, ndlp, payload);
+
+		/* If Nport discovery is delayed, reject PLOGIs */
+		if (vport->fc_flag & FC_DISC_DELAYED) {
+			rjt_err = LSRJT_UNABLE_TPC;
+			rjt_exp = LSEXP_NOTHING_MORE;
+			break;
+		}
+
+		if (vport->port_state < LPFC_DISC_AUTH) {
+			if (!(phba->pport->fc_flag & FC_PT2PT) ||
+				(phba->pport->fc_flag & FC_PT2PT_PLOGI)) {
+				rjt_err = LSRJT_UNABLE_TPC;
+				rjt_exp = LSEXP_NOTHING_MORE;
+				break;
+			}
+		}
+
+		spin_lock_irq(&ndlp->lock);
+		ndlp->nlp_flag &= ~NLP_TARGET_REMOVE;
+		spin_unlock_irq(&ndlp->lock);
+
+		lpfc_disc_state_machine(vport, ndlp, elsiocb,
+					NLP_EVT_RCV_PLOGI);
+
+		break;
+	case ELS_CMD_FLOGI:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV FLOGI:       did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvFLOGI++;
+
+		/* If the driver believes fabric discovery is done and is ready,
+		 * bounce the link.  There is some descrepancy.
+		 */
+		if (vport->port_state >= LPFC_LOCAL_CFG_LINK &&
+		    vport->fc_flag & FC_PT2PT &&
+		    vport->rcv_flogi_cnt >= 1) {
+			rjt_err = LSRJT_LOGICAL_BSY;
+			rjt_exp = LSEXP_NOTHING_MORE;
+			init_link++;
+			goto lsrjt;
+		}
+
+		lpfc_els_rcv_flogi(vport, elsiocb, ndlp);
+		/* retain node if our response is deferred */
+		if (phba->defer_flogi_acc_flag)
+			break;
+		if (newnode)
+			lpfc_disc_state_machine(vport, ndlp, NULL,
+					NLP_EVT_DEVICE_RM);
+		break;
+	case ELS_CMD_LOGO:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV LOGO:        did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvLOGO++;
+		lpfc_send_els_event(vport, ndlp, payload);
+		if (vport->port_state < LPFC_DISC_AUTH) {
+			rjt_err = LSRJT_UNABLE_TPC;
+			rjt_exp = LSEXP_NOTHING_MORE;
+			break;
+		}
+		lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_LOGO);
+		if (newnode)
+			lpfc_disc_state_machine(vport, ndlp, NULL,
+					NLP_EVT_DEVICE_RM);
+		break;
+	case ELS_CMD_PRLO:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV PRLO:        did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvPRLO++;
+		lpfc_send_els_event(vport, ndlp, payload);
+		if (vport->port_state < LPFC_DISC_AUTH) {
+			rjt_err = LSRJT_UNABLE_TPC;
+			rjt_exp = LSEXP_NOTHING_MORE;
+			break;
+		}
+		lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLO);
+		break;
+	case ELS_CMD_LCB:
+		phba->fc_stat.elsRcvLCB++;
+		lpfc_els_rcv_lcb(vport, elsiocb, ndlp);
+		break;
+	case ELS_CMD_RDP:
+		phba->fc_stat.elsRcvRDP++;
+		lpfc_els_rcv_rdp(vport, elsiocb, ndlp);
+		break;
+	case ELS_CMD_RSCN:
+		phba->fc_stat.elsRcvRSCN++;
+		lpfc_els_rcv_rscn(vport, elsiocb, ndlp);
+		if (newnode)
+			lpfc_disc_state_machine(vport, ndlp, NULL,
+					NLP_EVT_DEVICE_RM);
+		break;
+	case ELS_CMD_ADISC:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV ADISC:       did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		lpfc_send_els_event(vport, ndlp, payload);
+		phba->fc_stat.elsRcvADISC++;
+		if (vport->port_state < LPFC_DISC_AUTH) {
+			rjt_err = LSRJT_UNABLE_TPC;
+			rjt_exp = LSEXP_NOTHING_MORE;
+			break;
+		}
+		lpfc_disc_state_machine(vport, ndlp, elsiocb,
+					NLP_EVT_RCV_ADISC);
+		break;
+	case ELS_CMD_PDISC:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV PDISC:       did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvPDISC++;
+		if (vport->port_state < LPFC_DISC_AUTH) {
+			rjt_err = LSRJT_UNABLE_TPC;
+			rjt_exp = LSEXP_NOTHING_MORE;
+			break;
+		}
+		lpfc_disc_state_machine(vport, ndlp, elsiocb,
+					NLP_EVT_RCV_PDISC);
+		break;
+	case ELS_CMD_FARPR:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV FARPR:       did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvFARPR++;
+		lpfc_els_rcv_farpr(vport, elsiocb, ndlp);
+		break;
+	case ELS_CMD_FARP:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV FARP:        did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvFARP++;
+		lpfc_els_rcv_farp(vport, elsiocb, ndlp);
+		break;
+	case ELS_CMD_FAN:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV FAN:         did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvFAN++;
+		lpfc_els_rcv_fan(vport, elsiocb, ndlp);
+		break;
+	case ELS_CMD_PRLI:
+	case ELS_CMD_NVMEPRLI:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV PRLI:        did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvPRLI++;
+		if ((vport->port_state < LPFC_DISC_AUTH) &&
+		    (vport->fc_flag & FC_FABRIC)) {
+			rjt_err = LSRJT_UNABLE_TPC;
+			rjt_exp = LSEXP_NOTHING_MORE;
+			break;
+		}
+		lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLI);
+		break;
+	case ELS_CMD_LIRR:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV LIRR:        did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvLIRR++;
+		lpfc_els_rcv_lirr(vport, elsiocb, ndlp);
+		if (newnode)
+			lpfc_disc_state_machine(vport, ndlp, NULL,
+					NLP_EVT_DEVICE_RM);
+		break;
+	case ELS_CMD_RLS:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV RLS:         did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvRLS++;
+		lpfc_els_rcv_rls(vport, elsiocb, ndlp);
+		if (newnode)
+			lpfc_disc_state_machine(vport, ndlp, NULL,
+					NLP_EVT_DEVICE_RM);
+		break;
+	case ELS_CMD_RPL:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV RPL:         did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvRPL++;
+		lpfc_els_rcv_rpl(vport, elsiocb, ndlp);
+		if (newnode)
+			lpfc_disc_state_machine(vport, ndlp, NULL,
+					NLP_EVT_DEVICE_RM);
+		break;
+	case ELS_CMD_RNID:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV RNID:        did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvRNID++;
+		lpfc_els_rcv_rnid(vport, elsiocb, ndlp);
+		if (newnode)
+			lpfc_disc_state_machine(vport, ndlp, NULL,
+					NLP_EVT_DEVICE_RM);
+		break;
+	case ELS_CMD_RTV:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV RTV:        did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+		phba->fc_stat.elsRcvRTV++;
+		lpfc_els_rcv_rtv(vport, elsiocb, ndlp);
+		if (newnode)
+			lpfc_disc_state_machine(vport, ndlp, NULL,
+					NLP_EVT_DEVICE_RM);
+		break;
+	case ELS_CMD_RRQ:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV RRQ:         did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvRRQ++;
+		lpfc_els_rcv_rrq(vport, elsiocb, ndlp);
+		if (newnode)
+			lpfc_disc_state_machine(vport, ndlp, NULL,
+					NLP_EVT_DEVICE_RM);
+		break;
+	case ELS_CMD_ECHO:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV ECHO:        did:x%x/ste:x%x flg:x%x",
+			did, vport->port_state, ndlp->nlp_flag);
+
+		phba->fc_stat.elsRcvECHO++;
+		lpfc_els_rcv_echo(vport, elsiocb, ndlp);
+		if (newnode)
+			lpfc_disc_state_machine(vport, ndlp, NULL,
+					NLP_EVT_DEVICE_RM);
+		break;
+	case ELS_CMD_REC:
+		/* receive this due to exchange closed */
+		rjt_err = LSRJT_UNABLE_TPC;
+		rjt_exp = LSEXP_INVALID_OX_RX;
+		break;
+	case ELS_CMD_FPIN:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+				      "RCV FPIN:       did:x%x/ste:x%x flg:x%x",
+				      did, vport->port_state, ndlp->nlp_flag);
+
+		lpfc_els_rcv_fpin(vport, (struct fc_els_fpin *)payload,
+				  payload_len);
+
+		/* There are no replies, so no rjt codes */
+		break;
+	case ELS_CMD_EDC:
+		lpfc_els_rcv_edc(vport, elsiocb, ndlp);
+		break;
+	case ELS_CMD_RDF:
+		phba->fc_stat.elsRcvRDF++;
+		/* Accept RDF only from fabric controller */
+		if (did != Fabric_Cntl_DID) {
+			lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
+					 "1115 Received RDF from invalid DID "
+					 "x%x\n", did);
+			rjt_err = LSRJT_PROTOCOL_ERR;
+			rjt_exp = LSEXP_NOTHING_MORE;
+			goto lsrjt;
+		}
+
+		lpfc_els_rcv_rdf(vport, elsiocb, ndlp);
+		break;
+	default:
+		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
+			"RCV ELS cmd:     cmd:x%x did:x%x/ste:x%x",
+			cmd, did, vport->port_state);
+
+		/* Unsupported ELS command, reject */
+		rjt_err = LSRJT_CMD_UNSUPPORTED;
+		rjt_exp = LSEXP_NOTHING_MORE;
+
+		/* Unknown ELS command <elsCmd> received from NPORT <did> */
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				 "0115 Unknown ELS command x%x "
+				 "received from NPORT x%x\n", cmd, did);
+		if (newnode)
+			lpfc_disc_state_machine(vport, ndlp, NULL,
+					NLP_EVT_DEVICE_RM);
+		break;
+	}
+
+lsrjt:
+	/* check if need to LS_RJT received ELS cmd */
+	if (rjt_err) {
+		memset(&stat, 0, sizeof(stat));
+		stat.un.b.lsRjtRsnCode = rjt_err;
+		stat.un.b.lsRjtRsnCodeExp = rjt_exp;
+		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, elsiocb, ndlp,
+				    NULL);
+		/* Remove the reference from above for new nodes. */
+		if (newnode)
+			lpfc_disc_state_machine(vport, ndlp, NULL,
+					NLP_EVT_DEVICE_RM);
+	}
+
+	/* Release the reference on this elsiocb, not the ndlp. */
+	lpfc_nlp_put(elsiocb->ndlp);
+	elsiocb->ndlp = NULL;
+
+	/* Special case.  Driver received an unsolicited command that
+	 * unsupportable given the driver's current state.  Reset the
+	 * link and start over.
+	 */
+	if (init_link) {
+		mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+		if (!mbox)
+			return;
+		lpfc_linkdown(phba);
+		lpfc_init_link(phba, mbox,
+			       phba->cfg_topology,
+			       phba->cfg_link_speed);
+		mbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
+		mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
+		mbox->vport = vport;
+		if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT) ==
+		    MBX_NOT_FINISHED)
+			mempool_free(mbox, phba->mbox_mem_pool);
+	}
+
+	return;
+
+dropit:
+	if (vport && !(vport->load_flag & FC_UNLOADING))
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+			"0111 Dropping received ELS cmd "
+			"Data: x%x x%x x%x x%x\n",
+			cmd, status, get_job_word4(phba, elsiocb), did);
+
+	phba->fc_stat.elsRcvDrop++;
+}
+
+/**
+ * lpfc_els_unsol_event - Process an unsolicited event from an els sli ring
+ * @phba: pointer to lpfc hba data structure.
+ * @pring: pointer to a SLI ring.
+ * @elsiocb: pointer to lpfc els iocb data structure.
+ *
+ * This routine is used to process an unsolicited event received from a SLI
+ * (Service Level Interface) ring. The actual processing of the data buffer
+ * associated with the unsolicited event is done by invoking the routine
+ * lpfc_els_unsol_buffer() after properly set up the iocb buffer from the
+ * SLI ring on which the unsolicited event was received.
+ **/
+void
+lpfc_els_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
+		     struct lpfc_iocbq *elsiocb)
+{
+	struct lpfc_vport *vport = elsiocb->vport;
+	u32 ulp_command, status, parameter, bde_count = 0;
+	IOCB_t *icmd;
+	struct lpfc_wcqe_complete *wcqe_cmpl = NULL;
+	struct lpfc_dmabuf *bdeBuf1 = elsiocb->cmd_dmabuf;
+	struct lpfc_dmabuf *bdeBuf2 = elsiocb->bpl_dmabuf;
+	dma_addr_t paddr;
+
+	elsiocb->cmd_dmabuf = NULL;
+	elsiocb->rsp_dmabuf = NULL;
+	elsiocb->bpl_dmabuf = NULL;
+
+	wcqe_cmpl = &elsiocb->wcqe_cmpl;
+	ulp_command = get_job_cmnd(phba, elsiocb);
+	status = get_job_ulpstatus(phba, elsiocb);
+	parameter = get_job_word4(phba, elsiocb);
+	if (phba->sli_rev == LPFC_SLI_REV4)
+		bde_count = wcqe_cmpl->word3;
+	else
+		bde_count = elsiocb->iocb.ulpBdeCount;
+
+	if (status == IOSTAT_NEED_BUFFER) {
+		lpfc_sli_hbqbuf_add_hbqs(phba, LPFC_ELS_HBQ);
+	} else if (status == IOSTAT_LOCAL_REJECT &&
+		   (parameter & IOERR_PARAM_MASK) ==
+		   IOERR_RCV_BUFFER_WAITING) {
+		phba->fc_stat.NoRcvBuf++;
+		/* Not enough posted buffers; Try posting more buffers */
+		if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED))
+			lpfc_sli3_post_buffer(phba, pring, 0);
+		return;
+	}
+
+	if (phba->sli_rev == LPFC_SLI_REV3) {
+		icmd = &elsiocb->iocb;
+		if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
+		    (ulp_command == CMD_IOCB_RCV_ELS64_CX ||
+		     ulp_command == CMD_IOCB_RCV_SEQ64_CX)) {
+			if (icmd->unsli3.rcvsli3.vpi == 0xffff)
+				vport = phba->pport;
+			else
+				vport = lpfc_find_vport_by_vpid(phba,
+						icmd->unsli3.rcvsli3.vpi);
+		}
+	}
+
+	/* If there are no BDEs associated
+	 * with this IOCB, there is nothing to do.
+	 */
+	if (bde_count == 0)
+		return;
+
+	/* Account for SLI2 or SLI3 and later unsolicited buffering */
+	if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
+		elsiocb->cmd_dmabuf = bdeBuf1;
+		if (bde_count == 2)
+			elsiocb->bpl_dmabuf = bdeBuf2;
+	} else {
+		icmd = &elsiocb->iocb;
+		paddr = getPaddr(icmd->un.cont64[0].addrHigh,
+				 icmd->un.cont64[0].addrLow);
+		elsiocb->cmd_dmabuf = lpfc_sli_ringpostbuf_get(phba, pring,
+							       paddr);
+		if (bde_count == 2) {
+			paddr = getPaddr(icmd->un.cont64[1].addrHigh,
+					 icmd->un.cont64[1].addrLow);
+			elsiocb->bpl_dmabuf = lpfc_sli_ringpostbuf_get(phba,
+									pring,
+									paddr);
+		}
+	}
+
+	lpfc_els_unsol_buffer(phba, pring, vport, elsiocb);
+	/*
+	 * The different unsolicited event handlers would tell us
+	 * if they are done with "mp" by setting cmd_dmabuf to NULL.
+	 */
+	if (elsiocb->cmd_dmabuf) {
+		lpfc_in_buf_free(phba, elsiocb->cmd_dmabuf);
+		elsiocb->cmd_dmabuf = NULL;
+	}
+
+	if (elsiocb->bpl_dmabuf) {
+		lpfc_in_buf_free(phba, elsiocb->bpl_dmabuf);
+		elsiocb->bpl_dmabuf = NULL;
+	}
+
+}
+
+static void
+lpfc_start_fdmi(struct lpfc_vport *vport)
+{
+	struct lpfc_nodelist *ndlp;
+
+	/* If this is the first time, allocate an ndlp and initialize
+	 * it. Otherwise, make sure the node is enabled and then do the
+	 * login.
+	 */
+	ndlp = lpfc_findnode_did(vport, FDMI_DID);
+	if (!ndlp) {
+		ndlp = lpfc_nlp_init(vport, FDMI_DID);
+		if (ndlp) {
+			ndlp->nlp_type |= NLP_FABRIC;
+		} else {
+			return;
+		}
+	}
+
+	lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
+	lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
+}
+
+/**
+ * lpfc_do_scr_ns_plogi - Issue a plogi to the name server for scr
+ * @phba: pointer to lpfc hba data structure.
+ * @vport: pointer to a virtual N_Port data structure.
+ *
+ * This routine issues a Port Login (PLOGI) to the Name Server with
+ * State Change Request (SCR) for a @vport. This routine will create an
+ * ndlp for the Name Server associated to the @vport if such node does
+ * not already exist. The PLOGI to Name Server is issued by invoking the
+ * lpfc_issue_els_plogi() routine. If Fabric-Device Management Interface
+ * (FDMI) is configured to the @vport, a FDMI node will be created and
+ * the PLOGI to FDMI is issued by invoking lpfc_issue_els_plogi() routine.
+ **/
+void
+lpfc_do_scr_ns_plogi(struct lpfc_hba *phba, struct lpfc_vport *vport)
+{
+	struct lpfc_nodelist *ndlp;
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+
+	/*
+	 * If lpfc_delay_discovery parameter is set and the clean address
+	 * bit is cleared and fc fabric parameters chenged, delay FC NPort
+	 * discovery.
+	 */
+	spin_lock_irq(shost->host_lock);
+	if (vport->fc_flag & FC_DISC_DELAYED) {
+		spin_unlock_irq(shost->host_lock);
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				 "3334 Delay fc port discovery for %d secs\n",
+				 phba->fc_ratov);
+		mod_timer(&vport->delayed_disc_tmo,
+			jiffies + msecs_to_jiffies(1000 * phba->fc_ratov));
+		return;
+	}
+	spin_unlock_irq(shost->host_lock);
+
+	ndlp = lpfc_findnode_did(vport, NameServer_DID);
+	if (!ndlp) {
+		ndlp = lpfc_nlp_init(vport, NameServer_DID);
+		if (!ndlp) {
+			if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
+				lpfc_disc_start(vport);
+				return;
+			}
+			lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+					 "0251 NameServer login: no memory\n");
+			return;
+		}
+	}
+
+	ndlp->nlp_type |= NLP_FABRIC;
+
+	lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
+
+	if (lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0)) {
+		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				 "0252 Cannot issue NameServer login\n");
+		return;
+	}
+
+	if ((phba->cfg_enable_SmartSAN ||
+	     (phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) &&
+	     (vport->load_flag & FC_ALLOW_FDMI))
+		lpfc_start_fdmi(vport);
+}
+
+/**
+ * lpfc_cmpl_reg_new_vport - Completion callback function to register new vport
+ * @phba: pointer to lpfc hba data structure.
+ * @pmb: pointer to the driver internal queue element for mailbox command.
+ *
+ * This routine is the completion callback function to register new vport
+ * mailbox command. If the new vport mailbox command completes successfully,
+ * the fabric registration login shall be performed on physical port (the
+ * new vport created is actually a physical port, with VPI 0) or the port
+ * login to Name Server for State Change Request (SCR) will be performed
+ * on virtual port (real virtual port, with VPI greater than 0).
+ **/
+static void
+lpfc_cmpl_reg_new_vport(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
+{
+	struct lpfc_vport *vport = pmb->vport;
+	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_nodelist *ndlp = pmb->ctx_ndlp;
+	MAILBOX_t *mb = &pmb->u.mb;
+	int rc;
+
+	spin_lock_irq(shost->host_lock);
+	vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
+	spin_unlock_irq(shost->host_lock);
+
+	if (mb->mbxStatus) {
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				"0915 Register VPI failed : Status: x%x"
+				" upd bit: x%x \n", mb->mbxStatus,
+				 mb->un.varRegVpi.upd);
+		if (phba->sli_rev == LPFC_SLI_REV4 &&
+			mb->un.varRegVpi.upd)
+			goto mbox_err_exit ;
+
+		switch (mb->mbxStatus) {
+		case 0x11:	/* unsupported feature */
+		case 0x9603:	/* max_vpi exceeded */
+		case 0x9602:	/* Link event since CLEAR_LA */
+			/* giving up on vport registration */
+			lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+			spin_lock_irq(shost->host_lock);
+			vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
+			spin_unlock_irq(shost->host_lock);
+			lpfc_can_disctmo(vport);
+			break;
+		/* If reg_vpi fail with invalid VPI status, re-init VPI */
+		case 0x20:
+			spin_lock_irq(shost->host_lock);
+			vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
+			spin_unlock_irq(shost->host_lock);
+			lpfc_init_vpi(phba, pmb, vport->vpi);
+			pmb->vport = vport;
+			pmb->mbox_cmpl = lpfc_init_vpi_cmpl;
+			rc = lpfc_sli_issue_mbox(phba, pmb,
+				MBX_NOWAIT);
+			if (rc == MBX_NOT_FINISHED) {
+				lpfc_printf_vlog(vport, KERN_ERR,
+						 LOG_TRACE_EVENT,
+					"2732 Failed to issue INIT_VPI"
+					" mailbox command\n");
+			} else {
+				lpfc_nlp_put(ndlp);
+				return;
+			}
+			fallthrough;
+		default:
+			/* Try to recover from this error */
+			if (phba->sli_rev == LPFC_SLI_REV4)
+				lpfc_sli4_unreg_all_rpis(vport);
+			lpfc_mbx_unreg_vpi(vport);
+			spin_lock_irq(shost->host_lock);
+			vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
+			spin_unlock_irq(shost->host_lock);
+			if (mb->mbxStatus == MBX_NOT_FINISHED)
+				break;
+			if ((vport->port_type == LPFC_PHYSICAL_PORT) &&
+			    !(vport->fc_flag & FC_LOGO_RCVD_DID_CHNG)) {
+				if (phba->sli_rev == LPFC_SLI_REV4)
+					lpfc_issue_init_vfi(vport);
+				else
+					lpfc_initial_flogi(vport);
+			} else {
+				lpfc_initial_fdisc(vport);
+			}
+			break;
+		}
+	} else {
+		spin_lock_irq(shost->host_lock);
+		vport->vpi_state |= LPFC_VPI_REGISTERED;
+		spin_unlock_irq(shost->host_lock);
+		if (vport == phba->pport) {
+			if (phba->sli_rev < LPFC_SLI_REV4)
+				lpfc_issue_fabric_reglogin(vport);
+			else {
+				/*
+				 * If the physical port is instantiated using
+				 * FDISC, do not start vport discovery.
+				 */
+				if (vport->port_state != LPFC_FDISC)
+					lpfc_start_fdiscs(phba);
+				lpfc_do_scr_ns_plogi(phba, vport);
+			}
+		} else {
+			lpfc_do_scr_ns_plogi(phba, vport);
+		}
+	}
+mbox_err_exit:
+	/* Now, we decrement the ndlp reference count held for this
+	 * callback function
+	 */
+	lpfc_nlp_put(ndlp);
+
+	mempool_free(pmb, phba->mbox_mem_pool);
+	return;
+}
+
+/**
+ * lpfc_register_new_vport - Register a new vport with a HBA
+ * @phba: pointer to lpfc hba data structure.
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine registers the @vport as a new virtual port with a HBA.
+ * It is done through a registering vpi mailbox command.
+ **/
+void
+lpfc_register_new_vport(struct lpfc_hba *phba, struct lpfc_vport *vport,
+			struct lpfc_nodelist *ndlp)
+{
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+	LPFC_MBOXQ_t *mbox;
+
+	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+	if (mbox) {
+		lpfc_reg_vpi(vport, mbox);
+		mbox->vport = vport;
+		mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
+		if (!mbox->ctx_ndlp) {
+			mempool_free(mbox, phba->mbox_mem_pool);
+			goto mbox_err_exit;
+		}
+
+		mbox->mbox_cmpl = lpfc_cmpl_reg_new_vport;
+		if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
+		    == MBX_NOT_FINISHED) {
+			/* mailbox command not success, decrement ndlp
+			 * reference count for this command
+			 */
+			lpfc_nlp_put(ndlp);
+			mempool_free(mbox, phba->mbox_mem_pool);
+
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				"0253 Register VPI: Can't send mbox\n");
+			goto mbox_err_exit;
+		}
+	} else {
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				 "0254 Register VPI: no memory\n");
+		goto mbox_err_exit;
+	}
+	return;
+
+mbox_err_exit:
+	lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+	spin_lock_irq(shost->host_lock);
+	vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
+	spin_unlock_irq(shost->host_lock);
+	return;
+}
+
+/**
+ * lpfc_cancel_all_vport_retry_delay_timer - Cancel all vport retry delay timer
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine cancels the retry delay timers to all the vports.
+ **/
+void
+lpfc_cancel_all_vport_retry_delay_timer(struct lpfc_hba *phba)
+{
+	struct lpfc_vport **vports;
+	struct lpfc_nodelist *ndlp;
+	uint32_t link_state;
+	int i;
+
+	/* Treat this failure as linkdown for all vports */
+	link_state = phba->link_state;
+	lpfc_linkdown(phba);
+	phba->link_state = link_state;
+
+	vports = lpfc_create_vport_work_array(phba);
+
+	if (vports) {
+		for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
+			ndlp = lpfc_findnode_did(vports[i], Fabric_DID);
+			if (ndlp)
+				lpfc_cancel_retry_delay_tmo(vports[i], ndlp);
+			lpfc_els_flush_cmd(vports[i]);
+		}
+		lpfc_destroy_vport_work_array(phba, vports);
+	}
+}
+
+/**
+ * lpfc_retry_pport_discovery - Start timer to retry FLOGI.
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine abort all pending discovery commands and
+ * start a timer to retry FLOGI for the physical port
+ * discovery.
+ **/
+void
+lpfc_retry_pport_discovery(struct lpfc_hba *phba)
+{
+	struct lpfc_nodelist *ndlp;
+
+	/* Cancel the all vports retry delay retry timers */
+	lpfc_cancel_all_vport_retry_delay_timer(phba);
+
+	/* If fabric require FLOGI, then re-instantiate physical login */
+	ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
+	if (!ndlp)
+		return;
+
+	mod_timer(&ndlp->nlp_delayfunc, jiffies + msecs_to_jiffies(1000));
+	spin_lock_irq(&ndlp->lock);
+	ndlp->nlp_flag |= NLP_DELAY_TMO;
+	spin_unlock_irq(&ndlp->lock);
+	ndlp->nlp_last_elscmd = ELS_CMD_FLOGI;
+	phba->pport->port_state = LPFC_FLOGI;
+	return;
+}
+
+/**
+ * lpfc_fabric_login_reqd - Check if FLOGI required.
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to FDISC command iocb.
+ * @rspiocb: pointer to FDISC response iocb.
+ *
+ * This routine checks if a FLOGI is reguired for FDISC
+ * to succeed.
+ **/
+static int
+lpfc_fabric_login_reqd(struct lpfc_hba *phba,
+		struct lpfc_iocbq *cmdiocb,
+		struct lpfc_iocbq *rspiocb)
+{
+	u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
+	u32 ulp_word4 = get_job_word4(phba, rspiocb);
+
+	if (ulp_status != IOSTAT_FABRIC_RJT ||
+	    ulp_word4 != RJT_LOGIN_REQUIRED)
+		return 0;
+	else
+		return 1;
+}
+
+/**
+ * lpfc_cmpl_els_fdisc - Completion function for fdisc iocb command
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the completion callback function to a Fabric Discover
+ * (FDISC) ELS command. Since all the FDISC ELS commands are issued
+ * single threaded, each FDISC completion callback function will reset
+ * the discovery timer for all vports such that the timers will not get
+ * unnecessary timeout. The function checks the FDISC IOCB status. If error
+ * detected, the vport will be set to FC_VPORT_FAILED state. Otherwise,the
+ * vport will set to FC_VPORT_ACTIVE state. It then checks whether the DID
+ * assigned to the vport has been changed with the completion of the FDISC
+ * command. If so, both RPI (Remote Port Index) and VPI (Virtual Port Index)
+ * are unregistered from the HBA, and then the lpfc_register_new_vport()
+ * routine is invoked to register new vport with the HBA. Otherwise, the
+ * lpfc_do_scr_ns_plogi() routine is invoked to issue a PLOGI to the Name
+ * Server for State Change Request (SCR).
+ **/
+static void
+lpfc_cmpl_els_fdisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		    struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = cmdiocb->vport;
+	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
+	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
+	struct lpfc_nodelist *np;
+	struct lpfc_nodelist *next_np;
+	struct lpfc_iocbq *piocb;
+	struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf, *prsp;
+	struct serv_parm *sp;
+	uint8_t fabric_param_changed;
+	u32 ulp_status, ulp_word4;
+
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+	ulp_word4 = get_job_word4(phba, rspiocb);
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "0123 FDISC completes. x%x/x%x prevDID: x%x\n",
+			 ulp_status, ulp_word4,
+			 vport->fc_prevDID);
+	/* Since all FDISCs are being single threaded, we
+	 * must reset the discovery timer for ALL vports
+	 * waiting to send FDISC when one completes.
+	 */
+	list_for_each_entry(piocb, &phba->fabric_iocb_list, list) {
+		lpfc_set_disctmo(piocb->vport);
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"FDISC cmpl:      status:x%x/x%x prevdid:x%x",
+		ulp_status, ulp_word4, vport->fc_prevDID);
+
+	if (ulp_status) {
+
+		if (lpfc_fabric_login_reqd(phba, cmdiocb, rspiocb)) {
+			lpfc_retry_pport_discovery(phba);
+			goto out;
+		}
+
+		/* Check for retry */
+		if (lpfc_els_retry(phba, cmdiocb, rspiocb))
+			goto out;
+		/* FDISC failed */
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				 "0126 FDISC failed. (x%x/x%x)\n",
+				 ulp_status, ulp_word4);
+		goto fdisc_failed;
+	}
+
+	lpfc_check_nlp_post_devloss(vport, ndlp);
+
+	spin_lock_irq(shost->host_lock);
+	vport->fc_flag &= ~FC_VPORT_CVL_RCVD;
+	vport->fc_flag &= ~FC_VPORT_LOGO_RCVD;
+	vport->fc_flag |= FC_FABRIC;
+	if (vport->phba->fc_topology == LPFC_TOPOLOGY_LOOP)
+		vport->fc_flag |=  FC_PUBLIC_LOOP;
+	spin_unlock_irq(shost->host_lock);
+
+	vport->fc_myDID = ulp_word4 & Mask_DID;
+	lpfc_vport_set_state(vport, FC_VPORT_ACTIVE);
+	prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
+	if (!prsp)
+		goto out;
+	sp = prsp->virt + sizeof(uint32_t);
+	fabric_param_changed = lpfc_check_clean_addr_bit(vport, sp);
+	memcpy(&vport->fabric_portname, &sp->portName,
+		sizeof(struct lpfc_name));
+	memcpy(&vport->fabric_nodename, &sp->nodeName,
+		sizeof(struct lpfc_name));
+	if (fabric_param_changed &&
+		!(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
+		/* If our NportID changed, we need to ensure all
+		 * remaining NPORTs get unreg_login'ed so we can
+		 * issue unreg_vpi.
+		 */
+		list_for_each_entry_safe(np, next_np,
+			&vport->fc_nodes, nlp_listp) {
+			if ((np->nlp_state != NLP_STE_NPR_NODE) ||
+			    !(np->nlp_flag & NLP_NPR_ADISC))
+				continue;
+			spin_lock_irq(&ndlp->lock);
+			np->nlp_flag &= ~NLP_NPR_ADISC;
+			spin_unlock_irq(&ndlp->lock);
+			lpfc_unreg_rpi(vport, np);
+		}
+		lpfc_cleanup_pending_mbox(vport);
+
+		if (phba->sli_rev == LPFC_SLI_REV4)
+			lpfc_sli4_unreg_all_rpis(vport);
+
+		lpfc_mbx_unreg_vpi(vport);
+		spin_lock_irq(shost->host_lock);
+		vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
+		if (phba->sli_rev == LPFC_SLI_REV4)
+			vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
+		else
+			vport->fc_flag |= FC_LOGO_RCVD_DID_CHNG;
+		spin_unlock_irq(shost->host_lock);
+	} else if ((phba->sli_rev == LPFC_SLI_REV4) &&
+		!(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
+		/*
+		 * Driver needs to re-reg VPI in order for f/w
+		 * to update the MAC address.
+		 */
+		lpfc_register_new_vport(phba, vport, ndlp);
+		lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
+		goto out;
+	}
+
+	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);
+
+	/* The FDISC completed successfully. Move the fabric ndlp to
+	 * UNMAPPED state and register with the transport.
+	 */
+	lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
+	goto out;
+
+fdisc_failed:
+	if (vport->fc_vport &&
+	    (vport->fc_vport->vport_state != FC_VPORT_NO_FABRIC_RSCS))
+		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+	/* Cancel discovery timer */
+	lpfc_can_disctmo(vport);
+out:
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(ndlp);
+}
+
+/**
+ * lpfc_issue_els_fdisc - Issue a fdisc iocb command
+ * @vport: pointer to a virtual N_Port data structure.
+ * @ndlp: pointer to a node-list data structure.
+ * @retry: number of retries to the command IOCB.
+ *
+ * This routine prepares and issues a Fabric Discover (FDISC) IOCB to
+ * a remote node (@ndlp) off a @vport. It uses the lpfc_issue_fabric_iocb()
+ * routine to issue the IOCB, which makes sure only one outstanding fabric
+ * IOCB will be sent off HBA at any given time.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the FDISC ELS command.
+ *
+ * Return code
+ *   0 - Successfully issued fdisc iocb command
+ *   1 - Failed to issue fdisc iocb command
+ **/
+static int
+lpfc_issue_els_fdisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
+		     uint8_t retry)
+{
+	struct lpfc_hba *phba = vport->phba;
+	IOCB_t *icmd;
+	union lpfc_wqe128 *wqe = NULL;
+	struct lpfc_iocbq *elsiocb;
+	struct serv_parm *sp;
+	uint8_t *pcmd;
+	uint16_t cmdsize;
+	int did = ndlp->nlp_DID;
+	int rc;
+
+	vport->port_state = LPFC_FDISC;
+	vport->fc_myDID = 0;
+	cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
+	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
+				     ELS_CMD_FDISC);
+	if (!elsiocb) {
+		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+				 "0255 Issue FDISC: no IOCB\n");
+		return 1;
+	}
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		wqe = &elsiocb->wqe;
+		bf_set(els_req64_sid, &wqe->els_req, 0);
+		bf_set(els_req64_sp, &wqe->els_req, 1);
+	} else {
+		icmd = &elsiocb->iocb;
+		icmd->un.elsreq64.myID = 0;
+		icmd->un.elsreq64.fl = 1;
+		icmd->ulpCt_h = 1;
+		icmd->ulpCt_l = 0;
+	}
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+	*((uint32_t *) (pcmd)) = ELS_CMD_FDISC;
+	pcmd += sizeof(uint32_t); /* CSP Word 1 */
+	memcpy(pcmd, &vport->phba->pport->fc_sparam, sizeof(struct serv_parm));
+	sp = (struct serv_parm *) pcmd;
+	/* Setup CSPs accordingly for Fabric */
+	sp->cmn.e_d_tov = 0;
+	sp->cmn.w2.r_a_tov = 0;
+	sp->cmn.virtual_fabric_support = 0;
+	sp->cls1.classValid = 0;
+	sp->cls2.seqDelivery = 1;
+	sp->cls3.seqDelivery = 1;
+
+	pcmd += sizeof(uint32_t); /* CSP Word 2 */
+	pcmd += sizeof(uint32_t); /* CSP Word 3 */
+	pcmd += sizeof(uint32_t); /* CSP Word 4 */
+	pcmd += sizeof(uint32_t); /* Port Name */
+	memcpy(pcmd, &vport->fc_portname, 8);
+	pcmd += sizeof(uint32_t); /* Node Name */
+	pcmd += sizeof(uint32_t); /* Node Name */
+	memcpy(pcmd, &vport->fc_nodename, 8);
+	sp->cmn.valid_vendor_ver_level = 0;
+	memset(sp->un.vendorVersion, 0, sizeof(sp->un.vendorVersion));
+	lpfc_set_disctmo(vport);
+
+	phba->fc_stat.elsXmitFDISC++;
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_fdisc;
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"Issue FDISC:     did:x%x",
+		did, 0, 0);
+
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp)
+		goto err_out;
+
+	rc = lpfc_issue_fabric_iocb(phba, elsiocb);
+	if (rc == IOCB_ERROR) {
+		lpfc_nlp_put(ndlp);
+		goto err_out;
+	}
+
+	lpfc_vport_set_state(vport, FC_VPORT_INITIALIZING);
+	return 0;
+
+ err_out:
+	lpfc_els_free_iocb(phba, elsiocb);
+	lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+	lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
+			 "0256 Issue FDISC: Cannot send IOCB\n");
+	return 1;
+}
+
+/**
+ * lpfc_cmpl_els_npiv_logo - Completion function with vport logo
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the completion callback function to the issuing of a LOGO
+ * ELS command off a vport. It frees the command IOCB and then decrement the
+ * reference count held on ndlp for this completion function, indicating that
+ * the reference to the ndlp is no long needed. Note that the
+ * lpfc_els_free_iocb() routine decrements the ndlp reference held for this
+ * callback function and an additional explicit ndlp reference decrementation
+ * will trigger the actual release of the ndlp.
+ **/
+static void
+lpfc_cmpl_els_npiv_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+			struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = cmdiocb->vport;
+	IOCB_t *irsp;
+	struct lpfc_nodelist *ndlp;
+	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+	u32 ulp_status, ulp_word4, did, tmo;
+
+	ndlp = cmdiocb->ndlp;
+
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+	ulp_word4 = get_job_word4(phba, rspiocb);
+
+	if (phba->sli_rev == LPFC_SLI_REV4) {
+		did = get_job_els_rsp64_did(phba, cmdiocb);
+		tmo = get_wqe_tmo(cmdiocb);
+	} else {
+		irsp = &rspiocb->iocb;
+		did = get_job_els_rsp64_did(phba, rspiocb);
+		tmo = irsp->ulpTimeout;
+	}
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"LOGO npiv cmpl:  status:x%x/x%x did:x%x",
+		ulp_status, ulp_word4, did);
+
+	/* NPIV LOGO completes to NPort <nlp_DID> */
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
+			 "2928 NPIV LOGO completes to NPort x%x "
+			 "Data: x%x x%x x%x x%x x%x x%x x%x\n",
+			 ndlp->nlp_DID, ulp_status, ulp_word4,
+			 tmo, vport->num_disc_nodes,
+			 kref_read(&ndlp->kref), ndlp->nlp_flag,
+			 ndlp->fc4_xpt_flags);
+
+	if (ulp_status == IOSTAT_SUCCESS) {
+		spin_lock_irq(shost->host_lock);
+		vport->fc_flag &= ~FC_NDISC_ACTIVE;
+		vport->fc_flag &= ~FC_FABRIC;
+		spin_unlock_irq(shost->host_lock);
+		lpfc_can_disctmo(vport);
+	}
+
+	if (ndlp->save_flags & NLP_WAIT_FOR_LOGO) {
+		/* Wake up lpfc_vport_delete if waiting...*/
+		if (ndlp->logo_waitq)
+			wake_up(ndlp->logo_waitq);
+		spin_lock_irq(&ndlp->lock);
+		ndlp->nlp_flag &= ~(NLP_ISSUE_LOGO | NLP_LOGO_SND);
+		ndlp->save_flags &= ~NLP_WAIT_FOR_LOGO;
+		spin_unlock_irq(&ndlp->lock);
+	}
+
+	/* Safe to release resources now. */
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(ndlp);
+}
+
+/**
+ * lpfc_issue_els_npiv_logo - Issue a logo off a vport
+ * @vport: pointer to a virtual N_Port data structure.
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine issues a LOGO ELS command to an @ndlp off a @vport.
+ *
+ * Note that the ndlp reference count will be incremented by 1 for holding the
+ * ndlp and the reference to ndlp will be stored into the ndlp field of
+ * the IOCB for the completion callback function to the LOGO ELS command.
+ *
+ * Return codes
+ *   0 - Successfully issued logo off the @vport
+ *   1 - Failed to issue logo off the @vport
+ **/
+int
+lpfc_issue_els_npiv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
+{
+	int rc = 0;
+	struct lpfc_hba  *phba = vport->phba;
+	struct lpfc_iocbq *elsiocb;
+	uint8_t *pcmd;
+	uint16_t cmdsize;
+
+	cmdsize = 2 * sizeof(uint32_t) + sizeof(struct lpfc_name);
+	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, ndlp->nlp_DID,
+				     ELS_CMD_LOGO);
+	if (!elsiocb)
+		return 1;
+
+	pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
+	*((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
+	pcmd += sizeof(uint32_t);
+
+	/* Fill in LOGO payload */
+	*((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
+	pcmd += sizeof(uint32_t);
+	memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));
+
+	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
+		"Issue LOGO npiv  did:x%x flg:x%x",
+		ndlp->nlp_DID, ndlp->nlp_flag, 0);
+
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_npiv_logo;
+	spin_lock_irq(&ndlp->lock);
+	ndlp->nlp_flag |= NLP_LOGO_SND;
+	spin_unlock_irq(&ndlp->lock);
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		goto err;
+	}
+
+	rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
+	if (rc == IOCB_ERROR) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		goto err;
+	}
+	return 0;
+
+err:
+	spin_lock_irq(&ndlp->lock);
+	ndlp->nlp_flag &= ~NLP_LOGO_SND;
+	spin_unlock_irq(&ndlp->lock);
+	return 1;
+}
+
+/**
+ * lpfc_fabric_block_timeout - Handler function to the fabric block timer
+ * @t: timer context used to obtain the lpfc hba.
+ *
+ * This routine is invoked by the fabric iocb block timer after
+ * timeout. It posts the fabric iocb block timeout event by setting the
+ * WORKER_FABRIC_BLOCK_TMO bit to work port event bitmap and then invokes
+ * lpfc_worker_wake_up() routine to wake up the worker thread. It is for
+ * the worker thread to invoke the lpfc_unblock_fabric_iocbs() on the
+ * posted event WORKER_FABRIC_BLOCK_TMO.
+ **/
+void
+lpfc_fabric_block_timeout(struct timer_list *t)
+{
+	struct lpfc_hba  *phba = from_timer(phba, t, fabric_block_timer);
+	unsigned long iflags;
+	uint32_t tmo_posted;
+
+	spin_lock_irqsave(&phba->pport->work_port_lock, iflags);
+	tmo_posted = phba->pport->work_port_events & WORKER_FABRIC_BLOCK_TMO;
+	if (!tmo_posted)
+		phba->pport->work_port_events |= WORKER_FABRIC_BLOCK_TMO;
+	spin_unlock_irqrestore(&phba->pport->work_port_lock, iflags);
+
+	if (!tmo_posted)
+		lpfc_worker_wake_up(phba);
+	return;
+}
+
+/**
+ * lpfc_resume_fabric_iocbs - Issue a fabric iocb from driver internal list
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine issues one fabric iocb from the driver internal list to
+ * the HBA. It first checks whether it's ready to issue one fabric iocb to
+ * the HBA (whether there is no outstanding fabric iocb). If so, it shall
+ * remove one pending fabric iocb from the driver internal list and invokes
+ * lpfc_sli_issue_iocb() routine to send the fabric iocb to the HBA.
+ **/
+static void
+lpfc_resume_fabric_iocbs(struct lpfc_hba *phba)
+{
+	struct lpfc_iocbq *iocb;
+	unsigned long iflags;
+	int ret;
+
+repeat:
+	iocb = NULL;
+	spin_lock_irqsave(&phba->hbalock, iflags);
+	/* Post any pending iocb to the SLI layer */
+	if (atomic_read(&phba->fabric_iocb_count) == 0) {
+		list_remove_head(&phba->fabric_iocb_list, iocb, typeof(*iocb),
+				 list);
+		if (iocb)
+			/* Increment fabric iocb count to hold the position */
+			atomic_inc(&phba->fabric_iocb_count);
+	}
+	spin_unlock_irqrestore(&phba->hbalock, iflags);
+	if (iocb) {
+		iocb->fabric_cmd_cmpl = iocb->cmd_cmpl;
+		iocb->cmd_cmpl = lpfc_cmpl_fabric_iocb;
+		iocb->cmd_flag |= LPFC_IO_FABRIC;
+
+		lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
+				      "Fabric sched1:   ste:x%x",
+				      iocb->vport->port_state, 0, 0);
+
+		ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
+
+		if (ret == IOCB_ERROR) {
+			iocb->cmd_cmpl = iocb->fabric_cmd_cmpl;
+			iocb->fabric_cmd_cmpl = NULL;
+			iocb->cmd_flag &= ~LPFC_IO_FABRIC;
+			set_job_ulpstatus(iocb, IOSTAT_LOCAL_REJECT);
+			iocb->wcqe_cmpl.parameter = IOERR_SLI_ABORTED;
+			iocb->cmd_cmpl(phba, iocb, iocb);
+
+			atomic_dec(&phba->fabric_iocb_count);
+			goto repeat;
+		}
+	}
+}
+
+/**
+ * lpfc_unblock_fabric_iocbs - Unblock issuing fabric iocb command
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine unblocks the  issuing fabric iocb command. The function
+ * will clear the fabric iocb block bit and then invoke the routine
+ * lpfc_resume_fabric_iocbs() to issue one of the pending fabric iocb
+ * from the driver internal fabric iocb list.
+ **/
+void
+lpfc_unblock_fabric_iocbs(struct lpfc_hba *phba)
+{
+	clear_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
+
+	lpfc_resume_fabric_iocbs(phba);
+	return;
+}
+
+/**
+ * lpfc_block_fabric_iocbs - Block issuing fabric iocb command
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine blocks the issuing fabric iocb for a specified amount of
+ * time (currently 100 ms). This is done by set the fabric iocb block bit
+ * and set up a timeout timer for 100ms. When the block bit is set, no more
+ * fabric iocb will be issued out of the HBA.
+ **/
+static void
+lpfc_block_fabric_iocbs(struct lpfc_hba *phba)
+{
+	int blocked;
+
+	blocked = test_and_set_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
+	/* Start a timer to unblock fabric iocbs after 100ms */
+	if (!blocked)
+		mod_timer(&phba->fabric_block_timer,
+			  jiffies + msecs_to_jiffies(100));
+
+	return;
+}
+
+/**
+ * lpfc_cmpl_fabric_iocb - Completion callback function for fabric iocb
+ * @phba: pointer to lpfc hba data structure.
+ * @cmdiocb: pointer to lpfc command iocb data structure.
+ * @rspiocb: pointer to lpfc response iocb data structure.
+ *
+ * This routine is the callback function that is put to the fabric iocb's
+ * callback function pointer (iocb->cmd_cmpl). The original iocb's callback
+ * function pointer has been stored in iocb->fabric_cmd_cmpl. This callback
+ * function first restores and invokes the original iocb's callback function
+ * and then invokes the lpfc_resume_fabric_iocbs() routine to issue the next
+ * fabric bound iocb from the driver internal fabric iocb list onto the wire.
+ **/
+static void
+lpfc_cmpl_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		      struct lpfc_iocbq *rspiocb)
+{
+	struct ls_rjt stat;
+	u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
+	u32 ulp_word4 = get_job_word4(phba, rspiocb);
+
+	WARN_ON((cmdiocb->cmd_flag & LPFC_IO_FABRIC) != LPFC_IO_FABRIC);
+
+	switch (ulp_status) {
+		case IOSTAT_NPORT_RJT:
+		case IOSTAT_FABRIC_RJT:
+			if (ulp_word4 & RJT_UNAVAIL_TEMP)
+				lpfc_block_fabric_iocbs(phba);
+			break;
+
+		case IOSTAT_NPORT_BSY:
+		case IOSTAT_FABRIC_BSY:
+			lpfc_block_fabric_iocbs(phba);
+			break;
+
+		case IOSTAT_LS_RJT:
+			stat.un.ls_rjt_error_be =
+				cpu_to_be32(ulp_word4);
+			if ((stat.un.b.lsRjtRsnCode == LSRJT_UNABLE_TPC) ||
+				(stat.un.b.lsRjtRsnCode == LSRJT_LOGICAL_BSY))
+				lpfc_block_fabric_iocbs(phba);
+			break;
+	}
+
+	BUG_ON(atomic_read(&phba->fabric_iocb_count) == 0);
+
+	cmdiocb->cmd_cmpl = cmdiocb->fabric_cmd_cmpl;
+	cmdiocb->fabric_cmd_cmpl = NULL;
+	cmdiocb->cmd_flag &= ~LPFC_IO_FABRIC;
+	cmdiocb->cmd_cmpl(phba, cmdiocb, rspiocb);
+
+	atomic_dec(&phba->fabric_iocb_count);
+	if (!test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags)) {
+		/* Post any pending iocbs to HBA */
+		lpfc_resume_fabric_iocbs(phba);
+	}
+}
+
+/**
+ * lpfc_issue_fabric_iocb - Issue a fabric iocb command
+ * @phba: pointer to lpfc hba data structure.
+ * @iocb: pointer to lpfc command iocb data structure.
+ *
+ * This routine is used as the top-level API for issuing a fabric iocb command
+ * such as FLOGI and FDISC. To accommodate certain switch fabric, this driver
+ * function makes sure that only one fabric bound iocb will be outstanding at
+ * any given time. As such, this function will first check to see whether there
+ * is already an outstanding fabric iocb on the wire. If so, it will put the
+ * newly issued iocb onto the driver internal fabric iocb list, waiting to be
+ * issued later. Otherwise, it will issue the iocb on the wire and update the
+ * fabric iocb count it indicate that there is one fabric iocb on the wire.
+ *
+ * Note, this implementation has a potential sending out fabric IOCBs out of
+ * order. The problem is caused by the construction of the "ready" boolen does
+ * not include the condition that the internal fabric IOCB list is empty. As
+ * such, it is possible a fabric IOCB issued by this routine might be "jump"
+ * ahead of the fabric IOCBs in the internal list.
+ *
+ * Return code
+ *   IOCB_SUCCESS - either fabric iocb put on the list or issued successfully
+ *   IOCB_ERROR - failed to issue fabric iocb
+ **/
+static int
+lpfc_issue_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *iocb)
+{
+	unsigned long iflags;
+	int ready;
+	int ret;
+
+	BUG_ON(atomic_read(&phba->fabric_iocb_count) > 1);
+
+	spin_lock_irqsave(&phba->hbalock, iflags);
+	ready = atomic_read(&phba->fabric_iocb_count) == 0 &&
+		!test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
+
+	if (ready)
+		/* Increment fabric iocb count to hold the position */
+		atomic_inc(&phba->fabric_iocb_count);
+	spin_unlock_irqrestore(&phba->hbalock, iflags);
+	if (ready) {
+		iocb->fabric_cmd_cmpl = iocb->cmd_cmpl;
+		iocb->cmd_cmpl = lpfc_cmpl_fabric_iocb;
+		iocb->cmd_flag |= LPFC_IO_FABRIC;
+
+		lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
+				      "Fabric sched2:   ste:x%x",
+				      iocb->vport->port_state, 0, 0);
+
+		ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
+
+		if (ret == IOCB_ERROR) {
+			iocb->cmd_cmpl = iocb->fabric_cmd_cmpl;
+			iocb->fabric_cmd_cmpl = NULL;
+			iocb->cmd_flag &= ~LPFC_IO_FABRIC;
+			atomic_dec(&phba->fabric_iocb_count);
+		}
+	} else {
+		spin_lock_irqsave(&phba->hbalock, iflags);
+		list_add_tail(&iocb->list, &phba->fabric_iocb_list);
+		spin_unlock_irqrestore(&phba->hbalock, iflags);
+		ret = IOCB_SUCCESS;
+	}
+	return ret;
+}
+
+/**
+ * lpfc_fabric_abort_vport - Abort a vport's iocbs from driver fabric iocb list
+ * @vport: pointer to a virtual N_Port data structure.
+ *
+ * This routine aborts all the IOCBs associated with a @vport from the
+ * driver internal fabric IOCB list. The list contains fabric IOCBs to be
+ * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
+ * list, removes each IOCB associated with the @vport off the list, set the
+ * status field to IOSTAT_LOCAL_REJECT, and invokes the callback function
+ * associated with the IOCB.
+ **/
+static void lpfc_fabric_abort_vport(struct lpfc_vport *vport)
+{
+	LIST_HEAD(completions);
+	struct lpfc_hba  *phba = vport->phba;
+	struct lpfc_iocbq *tmp_iocb, *piocb;
+
+	spin_lock_irq(&phba->hbalock);
+	list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
+				 list) {
+
+		if (piocb->vport != vport)
+			continue;
+
+		list_move_tail(&piocb->list, &completions);
+	}
+	spin_unlock_irq(&phba->hbalock);
+
+	/* Cancel all the IOCBs from the completions list */
+	lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
+			      IOERR_SLI_ABORTED);
+}
+
+/**
+ * lpfc_fabric_abort_nport - Abort a ndlp's iocbs from driver fabric iocb list
+ * @ndlp: pointer to a node-list data structure.
+ *
+ * This routine aborts all the IOCBs associated with an @ndlp from the
+ * driver internal fabric IOCB list. The list contains fabric IOCBs to be
+ * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
+ * list, removes each IOCB associated with the @ndlp off the list, set the
+ * status field to IOSTAT_LOCAL_REJECT, and invokes the callback function
+ * associated with the IOCB.
+ **/
+void lpfc_fabric_abort_nport(struct lpfc_nodelist *ndlp)
+{
+	LIST_HEAD(completions);
+	struct lpfc_hba  *phba = ndlp->phba;
+	struct lpfc_iocbq *tmp_iocb, *piocb;
+	struct lpfc_sli_ring *pring;
+
+	pring = lpfc_phba_elsring(phba);
+
+	if (unlikely(!pring))
+		return;
+
+	spin_lock_irq(&phba->hbalock);
+	list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
+				 list) {
+		if ((lpfc_check_sli_ndlp(phba, pring, piocb, ndlp))) {
+
+			list_move_tail(&piocb->list, &completions);
+		}
+	}
+	spin_unlock_irq(&phba->hbalock);
+
+	/* Cancel all the IOCBs from the completions list */
+	lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
+			      IOERR_SLI_ABORTED);
+}
+
+/**
+ * lpfc_fabric_abort_hba - Abort all iocbs on driver fabric iocb list
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine aborts all the IOCBs currently on the driver internal
+ * fabric IOCB list. The list contains fabric IOCBs to be issued to the ELS
+ * IOCB ring. This function takes the entire IOCB list off the fabric IOCB
+ * list, removes IOCBs off the list, set the status field to
+ * IOSTAT_LOCAL_REJECT, and invokes the callback function associated with
+ * the IOCB.
+ **/
+void lpfc_fabric_abort_hba(struct lpfc_hba *phba)
+{
+	LIST_HEAD(completions);
+
+	spin_lock_irq(&phba->hbalock);
+	list_splice_init(&phba->fabric_iocb_list, &completions);
+	spin_unlock_irq(&phba->hbalock);
+
+	/* Cancel all the IOCBs from the completions list */
+	lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
+			      IOERR_SLI_ABORTED);
+}
+
+/**
+ * lpfc_sli4_vport_delete_els_xri_aborted -Remove all ndlp references for vport
+ * @vport: pointer to lpfc vport data structure.
+ *
+ * This routine is invoked by the vport cleanup for deletions and the cleanup
+ * for an ndlp on removal.
+ **/
+void
+lpfc_sli4_vport_delete_els_xri_aborted(struct lpfc_vport *vport)
+{
+	struct lpfc_hba *phba = vport->phba;
+	struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
+	struct lpfc_nodelist *ndlp = NULL;
+	unsigned long iflag = 0;
+
+	spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, iflag);
+	list_for_each_entry_safe(sglq_entry, sglq_next,
+			&phba->sli4_hba.lpfc_abts_els_sgl_list, list) {
+		if (sglq_entry->ndlp && sglq_entry->ndlp->vport == vport) {
+			lpfc_nlp_put(sglq_entry->ndlp);
+			ndlp = sglq_entry->ndlp;
+			sglq_entry->ndlp = NULL;
+
+			/* If the xri on the abts_els_sgl list is for the Fport
+			 * node and the vport is unloading, the xri aborted wcqe
+			 * likely isn't coming back.  Just release the sgl.
+			 */
+			if ((vport->load_flag & FC_UNLOADING) &&
+			    ndlp->nlp_DID == Fabric_DID) {
+				list_del(&sglq_entry->list);
+				sglq_entry->state = SGL_FREED;
+				list_add_tail(&sglq_entry->list,
+					&phba->sli4_hba.lpfc_els_sgl_list);
+			}
+		}
+	}
+	spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock, iflag);
+	return;
+}
+
+/**
+ * lpfc_sli4_els_xri_aborted - Slow-path process of els xri abort
+ * @phba: pointer to lpfc hba data structure.
+ * @axri: pointer to the els xri abort wcqe structure.
+ *
+ * This routine is invoked by the worker thread to process a SLI4 slow-path
+ * ELS aborted xri.
+ **/
+void
+lpfc_sli4_els_xri_aborted(struct lpfc_hba *phba,
+			  struct sli4_wcqe_xri_aborted *axri)
+{
+	uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
+	uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
+	uint16_t lxri = 0;
+
+	struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
+	unsigned long iflag = 0;
+	struct lpfc_nodelist *ndlp;
+	struct lpfc_sli_ring *pring;
+
+	pring = lpfc_phba_elsring(phba);
+
+	spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, iflag);
+	list_for_each_entry_safe(sglq_entry, sglq_next,
+			&phba->sli4_hba.lpfc_abts_els_sgl_list, list) {
+		if (sglq_entry->sli4_xritag == xri) {
+			list_del(&sglq_entry->list);
+			ndlp = sglq_entry->ndlp;
+			sglq_entry->ndlp = NULL;
+			list_add_tail(&sglq_entry->list,
+				&phba->sli4_hba.lpfc_els_sgl_list);
+			sglq_entry->state = SGL_FREED;
+			spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock,
+					       iflag);
+
+			if (ndlp) {
+				lpfc_set_rrq_active(phba, ndlp,
+					sglq_entry->sli4_lxritag,
+					rxid, 1);
+				lpfc_nlp_put(ndlp);
+			}
+
+			/* Check if TXQ queue needs to be serviced */
+			if (pring && !list_empty(&pring->txq))
+				lpfc_worker_wake_up(phba);
+			return;
+		}
+	}
+	spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock, iflag);
+	lxri = lpfc_sli4_xri_inrange(phba, xri);
+	if (lxri == NO_XRI)
+		return;
+
+	spin_lock_irqsave(&phba->hbalock, iflag);
+	sglq_entry = __lpfc_get_active_sglq(phba, lxri);
+	if (!sglq_entry || (sglq_entry->sli4_xritag != xri)) {
+		spin_unlock_irqrestore(&phba->hbalock, iflag);
+		return;
+	}
+	sglq_entry->state = SGL_XRI_ABORTED;
+	spin_unlock_irqrestore(&phba->hbalock, iflag);
+	return;
+}
+
+/* lpfc_sli_abts_recover_port - Recover a port that failed a BLS_ABORT req.
+ * @vport: pointer to virtual port object.
+ * @ndlp: nodelist pointer for the impacted node.
+ *
+ * The driver calls this routine in response to an SLI4 XRI ABORT CQE
+ * or an SLI3 ASYNC_STATUS_CN event from the port.  For either event,
+ * the driver is required to send a LOGO to the remote node before it
+ * attempts to recover its login to the remote node.
+ */
+void
+lpfc_sli_abts_recover_port(struct lpfc_vport *vport,
+			   struct lpfc_nodelist *ndlp)
+{
+	struct Scsi_Host *shost;
+	struct lpfc_hba *phba;
+	unsigned long flags = 0;
+
+	shost = lpfc_shost_from_vport(vport);
+	phba = vport->phba;
+	if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
+		lpfc_printf_log(phba, KERN_INFO,
+				LOG_SLI, "3093 No rport recovery needed. "
+				"rport in state 0x%x\n", ndlp->nlp_state);
+		return;
+	}
+	lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
+			"3094 Start rport recovery on shost id 0x%x "
+			"fc_id 0x%06x vpi 0x%x rpi 0x%x state 0x%x "
+			"flags 0x%x\n",
+			shost->host_no, ndlp->nlp_DID,
+			vport->vpi, ndlp->nlp_rpi, ndlp->nlp_state,
+			ndlp->nlp_flag);
+	/*
+	 * The rport is not responding.  Remove the FCP-2 flag to prevent
+	 * an ADISC in the follow-up recovery code.
+	 */
+	spin_lock_irqsave(&ndlp->lock, flags);
+	ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
+	ndlp->nlp_flag |= NLP_ISSUE_LOGO;
+	spin_unlock_irqrestore(&ndlp->lock, flags);
+	lpfc_unreg_rpi(vport, ndlp);
+}
+
+static void lpfc_init_cs_ctl_bitmap(struct lpfc_vport *vport)
+{
+	bitmap_zero(vport->vmid_priority_range, LPFC_VMID_MAX_PRIORITY_RANGE);
+}
+
+static void
+lpfc_vmid_set_cs_ctl_range(struct lpfc_vport *vport, u32 min, u32 max)
+{
+	u32 i;
+
+	if ((min > max) || (max > LPFC_VMID_MAX_PRIORITY_RANGE))
+		return;
+
+	for (i = min; i <= max; i++)
+		set_bit(i, vport->vmid_priority_range);
+}
+
+static void lpfc_vmid_put_cs_ctl(struct lpfc_vport *vport, u32 ctcl_vmid)
+{
+	set_bit(ctcl_vmid, vport->vmid_priority_range);
+}
+
+u32 lpfc_vmid_get_cs_ctl(struct lpfc_vport *vport)
+{
+	u32 i;
+
+	i = find_first_bit(vport->vmid_priority_range,
+			   LPFC_VMID_MAX_PRIORITY_RANGE);
+
+	if (i == LPFC_VMID_MAX_PRIORITY_RANGE)
+		return 0;
+
+	clear_bit(i, vport->vmid_priority_range);
+	return i;
+}
+
+#define MAX_PRIORITY_DESC	255
+
+static void
+lpfc_cmpl_els_qfpa(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		   struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = cmdiocb->vport;
+	struct priority_range_desc *desc;
+	struct lpfc_dmabuf *prsp = NULL;
+	struct lpfc_vmid_priority_range *vmid_range = NULL;
+	u32 *data;
+	struct lpfc_dmabuf *dmabuf = cmdiocb->cmd_dmabuf;
+	u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
+	u32 ulp_word4 = get_job_word4(phba, rspiocb);
+	u8 *pcmd, max_desc;
+	u32 len, i;
+	struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
+
+	prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
+	if (!prsp)
+		goto out;
+
+	pcmd = prsp->virt;
+	data = (u32 *)pcmd;
+	if (data[0] == ELS_CMD_LS_RJT) {
+		lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
+				 "3277 QFPA LS_RJT x%x  x%x\n",
+				 data[0], data[1]);
+		goto out;
+	}
+	if (ulp_status) {
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_SLI,
+				 "6529 QFPA failed with status x%x  x%x\n",
+				 ulp_status, ulp_word4);
+		goto out;
+	}
+
+	if (!vport->qfpa_res) {
+		max_desc = FCELSSIZE / sizeof(*vport->qfpa_res);
+		vport->qfpa_res = kcalloc(max_desc, sizeof(*vport->qfpa_res),
+					  GFP_KERNEL);
+		if (!vport->qfpa_res)
+			goto out;
+	}
+
+	len = *((u32 *)(pcmd + 4));
+	len = be32_to_cpu(len);
+	memcpy(vport->qfpa_res, pcmd, len + 8);
+	len = len / LPFC_PRIORITY_RANGE_DESC_SIZE;
+
+	desc = (struct priority_range_desc *)(pcmd + 8);
+	vmid_range = vport->vmid_priority.vmid_range;
+	if (!vmid_range) {
+		vmid_range = kcalloc(MAX_PRIORITY_DESC, sizeof(*vmid_range),
+				     GFP_KERNEL);
+		if (!vmid_range) {
+			kfree(vport->qfpa_res);
+			goto out;
+		}
+		vport->vmid_priority.vmid_range = vmid_range;
+	}
+	vport->vmid_priority.num_descriptors = len;
+
+	for (i = 0; i < len; i++, vmid_range++, desc++) {
+		lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
+				 "6539 vmid values low=%d, high=%d, qos=%d, "
+				 "local ve id=%d\n", desc->lo_range,
+				 desc->hi_range, desc->qos_priority,
+				 desc->local_ve_id);
+
+		vmid_range->low = desc->lo_range << 1;
+		if (desc->local_ve_id == QFPA_ODD_ONLY)
+			vmid_range->low++;
+		if (desc->qos_priority)
+			vport->vmid_flag |= LPFC_VMID_QOS_ENABLED;
+		vmid_range->qos = desc->qos_priority;
+
+		vmid_range->high = desc->hi_range << 1;
+		if ((desc->local_ve_id == QFPA_ODD_ONLY) ||
+		    (desc->local_ve_id == QFPA_EVEN_ODD))
+			vmid_range->high++;
+	}
+	lpfc_init_cs_ctl_bitmap(vport);
+	for (i = 0; i < vport->vmid_priority.num_descriptors; i++) {
+		lpfc_vmid_set_cs_ctl_range(vport,
+				vport->vmid_priority.vmid_range[i].low,
+				vport->vmid_priority.vmid_range[i].high);
+	}
+
+	vport->vmid_flag |= LPFC_VMID_QFPA_CMPL;
+ out:
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(ndlp);
+}
+
+int lpfc_issue_els_qfpa(struct lpfc_vport *vport)
+{
+	struct lpfc_hba *phba = vport->phba;
+	struct lpfc_nodelist *ndlp;
+	struct lpfc_iocbq *elsiocb;
+	u8 *pcmd;
+	int ret;
+
+	ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
+	if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
+		return -ENXIO;
+
+	elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_QFPA_SIZE, 2, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_QFPA);
+	if (!elsiocb)
+		return -ENOMEM;
+
+	pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
+
+	*((u32 *)(pcmd)) = ELS_CMD_QFPA;
+	pcmd += 4;
+
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_qfpa;
+
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(vport->phba, elsiocb);
+		return -ENXIO;
+	}
+
+	ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 2);
+	if (ret != IOCB_SUCCESS) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return -EIO;
+	}
+	vport->vmid_flag &= ~LPFC_VMID_QOS_ENABLED;
+	return 0;
+}
+
+int
+lpfc_vmid_uvem(struct lpfc_vport *vport,
+	       struct lpfc_vmid *vmid, bool instantiated)
+{
+	struct lpfc_vem_id_desc *vem_id_desc;
+	struct lpfc_nodelist *ndlp;
+	struct lpfc_iocbq *elsiocb;
+	struct instantiated_ve_desc *inst_desc;
+	struct lpfc_vmid_context *vmid_context;
+	u8 *pcmd;
+	u32 *len;
+	int ret = 0;
+
+	ndlp = lpfc_findnode_did(vport, Fabric_DID);
+	if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
+		return -ENXIO;
+
+	vmid_context = kmalloc(sizeof(*vmid_context), GFP_KERNEL);
+	if (!vmid_context)
+		return -ENOMEM;
+	elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_UVEM_SIZE, 2,
+				     ndlp, Fabric_DID, ELS_CMD_UVEM);
+	if (!elsiocb)
+		goto out;
+
+	lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
+			 "3427 Host vmid %s %d\n",
+			 vmid->host_vmid, instantiated);
+	vmid_context->vmp = vmid;
+	vmid_context->nlp = ndlp;
+	vmid_context->instantiated = instantiated;
+	elsiocb->vmid_tag.vmid_context = vmid_context;
+	pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
+
+	if (uuid_is_null((uuid_t *)vport->lpfc_vmid_host_uuid))
+		memcpy(vport->lpfc_vmid_host_uuid, vmid->host_vmid,
+		       LPFC_COMPRESS_VMID_SIZE);
+
+	*((u32 *)(pcmd)) = ELS_CMD_UVEM;
+	len = (u32 *)(pcmd + 4);
+	*len = cpu_to_be32(LPFC_UVEM_SIZE - 8);
+
+	vem_id_desc = (struct lpfc_vem_id_desc *)(pcmd + 8);
+	vem_id_desc->tag = be32_to_cpu(VEM_ID_DESC_TAG);
+	vem_id_desc->length = be32_to_cpu(LPFC_UVEM_VEM_ID_DESC_SIZE);
+	memcpy(vem_id_desc->vem_id, vport->lpfc_vmid_host_uuid,
+	       LPFC_COMPRESS_VMID_SIZE);
+
+	inst_desc = (struct instantiated_ve_desc *)(pcmd + 32);
+	inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
+	inst_desc->length = be32_to_cpu(LPFC_UVEM_VE_MAP_DESC_SIZE);
+	memcpy(inst_desc->global_vem_id, vmid->host_vmid,
+	       LPFC_COMPRESS_VMID_SIZE);
+
+	bf_set(lpfc_instantiated_nport_id, inst_desc, vport->fc_myDID);
+	bf_set(lpfc_instantiated_local_id, inst_desc,
+	       vmid->un.cs_ctl_vmid);
+	if (instantiated) {
+		inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
+	} else {
+		inst_desc->tag = be32_to_cpu(DEINSTANTIATED_VE_DESC_TAG);
+		lpfc_vmid_put_cs_ctl(vport, vmid->un.cs_ctl_vmid);
+	}
+	inst_desc->word6 = cpu_to_be32(inst_desc->word6);
+
+	elsiocb->cmd_cmpl = lpfc_cmpl_els_uvem;
+
+	elsiocb->ndlp = lpfc_nlp_get(ndlp);
+	if (!elsiocb->ndlp) {
+		lpfc_els_free_iocb(vport->phba, elsiocb);
+		goto out;
+	}
+
+	ret = lpfc_sli_issue_iocb(vport->phba, LPFC_ELS_RING, elsiocb, 0);
+	if (ret != IOCB_SUCCESS) {
+		lpfc_els_free_iocb(vport->phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		goto out;
+	}
+
+	return 0;
+ out:
+	kfree(vmid_context);
+	return -EIO;
+}
+
+static void
+lpfc_cmpl_els_uvem(struct lpfc_hba *phba, struct lpfc_iocbq *icmdiocb,
+		   struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = icmdiocb->vport;
+	struct lpfc_dmabuf *prsp = NULL;
+	struct lpfc_vmid_context *vmid_context =
+	    icmdiocb->vmid_tag.vmid_context;
+	struct lpfc_nodelist *ndlp = icmdiocb->ndlp;
+	u8 *pcmd;
+	u32 *data;
+	u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
+	u32 ulp_word4 = get_job_word4(phba, rspiocb);
+	struct lpfc_dmabuf *dmabuf = icmdiocb->cmd_dmabuf;
+	struct lpfc_vmid *vmid;
+
+	vmid = vmid_context->vmp;
+	if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
+		ndlp = NULL;
+
+	prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
+	if (!prsp)
+		goto out;
+	pcmd = prsp->virt;
+	data = (u32 *)pcmd;
+	if (data[0] == ELS_CMD_LS_RJT) {
+		lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
+				 "4532 UVEM LS_RJT %x %x\n", data[0], data[1]);
+		goto out;
+	}
+	if (ulp_status) {
+		lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
+				 "4533 UVEM error status %x: %x\n",
+				 ulp_status, ulp_word4);
+		goto out;
+	}
+	spin_lock(&phba->hbalock);
+	/* Set IN USE flag */
+	vport->vmid_flag |= LPFC_VMID_IN_USE;
+	phba->pport->vmid_flag |= LPFC_VMID_IN_USE;
+	spin_unlock(&phba->hbalock);
+
+	if (vmid_context->instantiated) {
+		write_lock(&vport->vmid_lock);
+		vmid->flag |= LPFC_VMID_REGISTERED;
+		vmid->flag &= ~LPFC_VMID_REQ_REGISTER;
+		write_unlock(&vport->vmid_lock);
+	}
+
+ out:
+	kfree(vmid_context);
+	lpfc_els_free_iocb(phba, icmdiocb);
+	lpfc_nlp_put(ndlp);
+}