text:  /*******************************************************************
   * This file is part of the Emulex Linux Device Driver for         *
   * Fibre Channel Host Bus Adapters.                                *
   * Copyright (C) 2017 Broadcom. All Rights Reserved. The term      *
   * “Broadcom” refers to Broadcom Limited 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.                                     *
   *******************************************************************/
  
  #include <linux/blkdev.h>
  #include <linux/pci.h>
  #include <linux/slab.h>
  #include <linux/interrupt.h>
  
  #include <scsi/scsi.h>
  #include <scsi/scsi_device.h>
  #include <scsi/scsi_host.h>
  #include <scsi/scsi_transport_fc.h>
  #include <scsi/fc/fc_fs.h>
  
  #include <linux/nvme-fc-driver.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.h"
  #include "lpfc_scsi.h"
  #include "lpfc_nvme.h"
  #include "lpfc_logmsg.h"
  #include "lpfc_crtn.h"
  #include "lpfc_vport.h"
  #include "lpfc_debugfs.h"
  
  
  /* Called to verify a rcv'ed ADISC was intended for us. */
  static int
  lpfc_check_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  		 struct lpfc_name *nn, struct lpfc_name *pn)
  {
  	/* First, we MUST have a RPI registered */
  	if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED))
  		return 0;
  
  	/* Compare the ADISC rsp WWNN / WWPN matches our internal node
  	 * table entry for that node.
  	 */
  	if (memcmp(nn, &ndlp->nlp_nodename, sizeof (struct lpfc_name)))
  		return 0;
  
  	if (memcmp(pn, &ndlp->nlp_portname, sizeof (struct lpfc_name)))
  		return 0;
  
  	/* we match, return success */
  	return 1;
  }
  
  int
  lpfc_check_sparm(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  		 struct serv_parm *sp, uint32_t class, int flogi)
  {
  	volatile struct serv_parm *hsp = &vport->fc_sparam;
  	uint16_t hsp_value, ssp_value = 0;
  
  	/*
  	 * The receive data field size and buffer-to-buffer receive data field
  	 * size entries are 16 bits but are represented as two 8-bit fields in
  	 * the driver data structure to account for rsvd bits and other control
  	 * bits.  Reconstruct and compare the fields as a 16-bit values before
  	 * correcting the byte values.
  	 */
  	if (sp->cls1.classValid) {
  		if (!flogi) {
  			hsp_value = ((hsp->cls1.rcvDataSizeMsb << 8) |
  				     hsp->cls1.rcvDataSizeLsb);
  			ssp_value = ((sp->cls1.rcvDataSizeMsb << 8) |
  				     sp->cls1.rcvDataSizeLsb);
  			if (!ssp_value)
  				goto bad_service_param;
  			if (ssp_value > hsp_value) {
  				sp->cls1.rcvDataSizeLsb =
  					hsp->cls1.rcvDataSizeLsb;
  				sp->cls1.rcvDataSizeMsb =
  					hsp->cls1.rcvDataSizeMsb;
  			}
  		}
  	} else if (class == CLASS1)
  		goto bad_service_param;
  	if (sp->cls2.classValid) {
  		if (!flogi) {
  			hsp_value = ((hsp->cls2.rcvDataSizeMsb << 8) |
  				     hsp->cls2.rcvDataSizeLsb);
  			ssp_value = ((sp->cls2.rcvDataSizeMsb << 8) |
  				     sp->cls2.rcvDataSizeLsb);
  			if (!ssp_value)
  				goto bad_service_param;
  			if (ssp_value > hsp_value) {
  				sp->cls2.rcvDataSizeLsb =
  					hsp->cls2.rcvDataSizeLsb;
  				sp->cls2.rcvDataSizeMsb =
  					hsp->cls2.rcvDataSizeMsb;
  			}
  		}
  	} else if (class == CLASS2)
  		goto bad_service_param;
  	if (sp->cls3.classValid) {
  		if (!flogi) {
  			hsp_value = ((hsp->cls3.rcvDataSizeMsb << 8) |
  				     hsp->cls3.rcvDataSizeLsb);
  			ssp_value = ((sp->cls3.rcvDataSizeMsb << 8) |
  				     sp->cls3.rcvDataSizeLsb);
  			if (!ssp_value)
  				goto bad_service_param;
  			if (ssp_value > hsp_value) {
  				sp->cls3.rcvDataSizeLsb =
  					hsp->cls3.rcvDataSizeLsb;
  				sp->cls3.rcvDataSizeMsb =
  					hsp->cls3.rcvDataSizeMsb;
  			}
  		}
  	} else if (class == CLASS3)
  		goto bad_service_param;
  
  	/*
  	 * Preserve the upper four bits of the MSB from the PLOGI response.
  	 * These bits contain the Buffer-to-Buffer State Change Number
  	 * from the target and need to be passed to the FW.
  	 */
  	hsp_value = (hsp->cmn.bbRcvSizeMsb << 8) | hsp->cmn.bbRcvSizeLsb;
  	ssp_value = (sp->cmn.bbRcvSizeMsb << 8) | sp->cmn.bbRcvSizeLsb;
  	if (ssp_value > hsp_value) {
  		sp->cmn.bbRcvSizeLsb = hsp->cmn.bbRcvSizeLsb;
  		sp->cmn.bbRcvSizeMsb = (sp->cmn.bbRcvSizeMsb & 0xF0) |
  				       (hsp->cmn.bbRcvSizeMsb & 0x0F);
  	}
  
  	memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof (struct lpfc_name));
  	memcpy(&ndlp->nlp_portname, &sp->portName, sizeof (struct lpfc_name));
  	return 1;
  bad_service_param:
  	lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
  			 "0207 Device %x "
  			 "(%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x) sent "
  			 "invalid service parameters.  Ignoring device.\n",
  			 ndlp->nlp_DID,
  			 sp->nodeName.u.wwn[0], sp->nodeName.u.wwn[1],
  			 sp->nodeName.u.wwn[2], sp->nodeName.u.wwn[3],
  			 sp->nodeName.u.wwn[4], sp->nodeName.u.wwn[5],
  			 sp->nodeName.u.wwn[6], sp->nodeName.u.wwn[7]);
  	return 0;
  }
  
  static void *
  lpfc_check_elscmpl_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
  			struct lpfc_iocbq *rspiocb)
  {
  	struct lpfc_dmabuf *pcmd, *prsp;
  	uint32_t *lp;
  	void     *ptr = NULL;
  	IOCB_t   *irsp;
  
  	irsp = &rspiocb->iocb;
  	pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
  
  	/* For lpfc_els_abort, context2 could be zero'ed to delay
  	 * freeing associated memory till after ABTS completes.
  	 */
  	if (pcmd) {
  		prsp =  list_get_first(&pcmd->list, struct lpfc_dmabuf,
  				       list);
  		if (prsp) {
  			lp = (uint32_t *) prsp->virt;
  			ptr = (void *)((uint8_t *)lp + sizeof(uint32_t));
  		}
  	} else {
  		/* Force ulpStatus error since we are returning NULL ptr */
  		if (!(irsp->ulpStatus)) {
  			irsp->ulpStatus = IOSTAT_LOCAL_REJECT;
  			irsp->un.ulpWord[4] = IOERR_SLI_ABORTED;
  		}
  		ptr = NULL;
  	}
  	return ptr;
  }
  
  
  
  /*
   * Free resources / clean up outstanding I/Os
   * associated with a LPFC_NODELIST entry. This
   * routine effectively results in a "software abort".
   */
  int
  lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
  {
  	LIST_HEAD(abort_list);
  	struct lpfc_sli_ring *pring;
  	struct lpfc_iocbq *iocb, *next_iocb;
  
  	pring = lpfc_phba_elsring(phba);
  
  	/* Abort outstanding I/O on NPort <nlp_DID> */
  	lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_DISCOVERY,
  			 "2819 Abort outstanding I/O on NPort x%x "
  			 "Data: x%x x%x x%x\n",
  			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
  			 ndlp->nlp_rpi);
  	/* Clean up all fabric IOs first.*/
  	lpfc_fabric_abort_nport(ndlp);
  
  	/*
  	 * Lock the ELS ring txcmplq for SLI3/SLI4 and build a local list
  	 * of all ELS IOs that need an ABTS.  The IOs need to stay on the
  	 * txcmplq so that the abort operation completes them successfully.
  	 */
  	spin_lock_irq(&phba->hbalock);
  	if (phba->sli_rev == LPFC_SLI_REV4)
  		spin_lock(&pring->ring_lock);
  	list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
  	/* Add to abort_list on on NDLP match. */
  		if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp))
  			list_add_tail(&iocb->dlist, &abort_list);
  	}
  	if (phba->sli_rev == LPFC_SLI_REV4)
  		spin_unlock(&pring->ring_lock);
  	spin_unlock_irq(&phba->hbalock);
  
  	/* Abort the targeted IOs and remove them from the abort list. */
  	list_for_each_entry_safe(iocb, next_iocb, &abort_list, dlist) {
  			spin_lock_irq(&phba->hbalock);
  			list_del_init(&iocb->dlist);
  			lpfc_sli_issue_abort_iotag(phba, pring, iocb);
  			spin_unlock_irq(&phba->hbalock);
  	}
  
  	INIT_LIST_HEAD(&abort_list);
  
  	/* Now process the txq */
  	spin_lock_irq(&phba->hbalock);
  	if (phba->sli_rev == LPFC_SLI_REV4)
  		spin_lock(&pring->ring_lock);
  
  	list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
  		/* Check to see if iocb matches the nport we are looking for */
  		if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
  			list_del_init(&iocb->list);
  			list_add_tail(&iocb->list, &abort_list);
  		}
  	}
  
  	if (phba->sli_rev == LPFC_SLI_REV4)
  		spin_unlock(&pring->ring_lock);
  	spin_unlock_irq(&phba->hbalock);
  
  	/* Cancel all the IOCBs from the completions list */
  	lpfc_sli_cancel_iocbs(phba, &abort_list,
  			      IOSTAT_LOCAL_REJECT, IOERR_SLI_ABORTED);
  
  	lpfc_cancel_retry_delay_tmo(phba->pport, ndlp);
  	return 0;
  }
  
  static int
  lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  	       struct lpfc_iocbq *cmdiocb)
  {
  	struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba    *phba = vport->phba;
  	struct lpfc_dmabuf *pcmd;
  	uint64_t nlp_portwwn = 0;
  	uint32_t *lp;
  	IOCB_t *icmd;
  	struct serv_parm *sp;
  	uint32_t ed_tov;
  	LPFC_MBOXQ_t *mbox;
  	struct ls_rjt stat;
  	uint32_t vid, flag;
  	int rc;
  
  	memset(&stat, 0, sizeof (struct ls_rjt));
  	pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
  	lp = (uint32_t *) pcmd->virt;
  	sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
  	if (wwn_to_u64(sp->portName.u.wwn) == 0) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
  				 "0140 PLOGI Reject: invalid nname\n");
  		stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
  		stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_PNAME;
  		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
  			NULL);
  		return 0;
  	}
  	if (wwn_to_u64(sp->nodeName.u.wwn) == 0) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
  				 "0141 PLOGI Reject: invalid pname\n");
  		stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
  		stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_NNAME;
  		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
  			NULL);
  		return 0;
  	}
  
  	nlp_portwwn = wwn_to_u64(ndlp->nlp_portname.u.wwn);
  	if ((lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0) == 0)) {
  		/* Reject this request because invalid parameters */
  		stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
  		stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
  		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
  			NULL);
  		return 0;
  	}
  	icmd = &cmdiocb->iocb;
  
  	/* PLOGI chkparm OK */
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
  			 "0114 PLOGI chkparm OK Data: x%x x%x x%x "
  			 "x%x x%x x%x\n",
  			 ndlp->nlp_DID, ndlp->nlp_state, ndlp->nlp_flag,
  			 ndlp->nlp_rpi, vport->port_state,
  			 vport->fc_flag);
  
  	if (vport->cfg_fcp_class == 2 && sp->cls2.classValid)
  		ndlp->nlp_fcp_info |= CLASS2;
  	else
  		ndlp->nlp_fcp_info |= CLASS3;
  
  	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;
  
  	/* if already logged in, do implicit logout */
  	switch (ndlp->nlp_state) {
  	case  NLP_STE_NPR_NODE:
  		if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
  			break;
  	case  NLP_STE_REG_LOGIN_ISSUE:
  	case  NLP_STE_PRLI_ISSUE:
  	case  NLP_STE_UNMAPPED_NODE:
  	case  NLP_STE_MAPPED_NODE:
  		/* lpfc_plogi_confirm_nport skips fabric did, handle it here */
  		if (!(ndlp->nlp_type & NLP_FABRIC)) {
  			lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb,
  					 ndlp, NULL);
  			return 1;
  		}
  		if (nlp_portwwn != 0 &&
  		    nlp_portwwn != wwn_to_u64(sp->portName.u.wwn))
  			lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
  					 "0143 PLOGI recv'd from DID: x%x "
  					 "WWPN changed: old %llx new %llx\n",
  					 ndlp->nlp_DID,
  					 (unsigned long long)nlp_portwwn,
  					 (unsigned long long)
  					 wwn_to_u64(sp->portName.u.wwn));
  
  		ndlp->nlp_prev_state = ndlp->nlp_state;
  		/* rport needs to be unregistered first */
  		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  		break;
  	}
  
  	/* Check for Nport to NPort pt2pt protocol */
  	if ((vport->fc_flag & FC_PT2PT) &&
  	    !(vport->fc_flag & FC_PT2PT_PLOGI)) {
  		/* rcv'ed PLOGI decides what our NPortId will be */
  		vport->fc_myDID = icmd->un.rcvels.parmRo;
  
  		ed_tov = be32_to_cpu(sp->cmn.e_d_tov);
  		if (sp->cmn.edtovResolution) {
  			/* E_D_TOV ticks are in nanoseconds */
  			ed_tov = (phba->fc_edtov + 999999) / 1000000;
  		}
  
  		/*
  		 * For pt-to-pt, use the larger EDTOV
  		 * RATOV = 2 * EDTOV
  		 */
  		if (ed_tov > phba->fc_edtov)
  			phba->fc_edtov = ed_tov;
  		phba->fc_ratov = (2 * phba->fc_edtov) / 1000;
  
  		memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
  
  		/* Issue config_link / reg_vfi to account for updated TOV's */
  
  		if (phba->sli_rev == LPFC_SLI_REV4)
  			lpfc_issue_reg_vfi(vport);
  		else {
  			mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  			if (mbox == NULL)
  				goto out;
  			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) {
  				mempool_free(mbox, phba->mbox_mem_pool);
  				goto out;
  			}
  		}
  
  		lpfc_can_disctmo(vport);
  	}
  
  	ndlp->nlp_flag &= ~NLP_SUPPRESS_RSP;
  	if ((phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) &&
  	    sp->cmn.valid_vendor_ver_level) {
  		vid = be32_to_cpu(sp->un.vv.vid);
  		flag = be32_to_cpu(sp->un.vv.flags);
  		if ((vid == LPFC_VV_EMLX_ID) && (flag & LPFC_VV_SUPPRESS_RSP))
  			ndlp->nlp_flag |= NLP_SUPPRESS_RSP;
  	}
  
  	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  	if (!mbox)
  		goto out;
  
  	/* Registering an existing RPI behaves differently for SLI3 vs SLI4 */
  	if (phba->sli_rev == LPFC_SLI_REV4)
  		lpfc_unreg_rpi(vport, ndlp);
  
  	rc = lpfc_reg_rpi(phba, vport->vpi, icmd->un.rcvels.remoteID,
  			    (uint8_t *) sp, mbox, ndlp->nlp_rpi);
  	if (rc) {
  		mempool_free(mbox, phba->mbox_mem_pool);
  		goto out;
  	}
  
  	/* ACC PLOGI rsp command needs to execute first,
  	 * queue this mbox command to be processed later.
  	 */
  	mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
  	/*
  	 * mbox->context2 = lpfc_nlp_get(ndlp) deferred until mailbox
  	 * command issued in lpfc_cmpl_els_acc().
  	 */
  	mbox->vport = vport;
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag |= (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI);
  	spin_unlock_irq(shost->host_lock);
  
  	/*
  	 * If there is an outstanding PLOGI issued, abort it before
  	 * sending ACC rsp for received PLOGI. If pending plogi
  	 * is not canceled here, the plogi will be rejected by
  	 * remote port and will be retried. On a configuration with
  	 * single discovery thread, this will cause a huge delay in
  	 * discovery. Also this will cause multiple state machines
  	 * running in parallel for this node.
  	 */
  	if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) {
  		/* software abort outstanding PLOGI */
  		lpfc_els_abort(phba, ndlp);
  	}
  
  	if ((vport->port_type == LPFC_NPIV_PORT &&
  	     vport->cfg_restrict_login)) {
  
  		/* In order to preserve RPIs, we want to cleanup
  		 * the default RPI the firmware created to rcv
  		 * this ELS request. The only way to do this is
  		 * to register, then unregister the RPI.
  		 */
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag |= NLP_RM_DFLT_RPI;
  		spin_unlock_irq(shost->host_lock);
  		stat.un.b.lsRjtRsnCode = LSRJT_INVALID_CMD;
  		stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
  		rc = lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
  			ndlp, mbox);
  		if (rc)
  			mempool_free(mbox, phba->mbox_mem_pool);
  		return 1;
  	}
  	rc = lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox);
  	if (rc)
  		mempool_free(mbox, phba->mbox_mem_pool);
  	return 1;
  out:
  	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
  	stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE;
  	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
  	return 0;
  }
  
  /**
   * lpfc_mbx_cmpl_resume_rpi - Resume RPI completion routine
   * @phba: pointer to lpfc hba data structure.
   * @mboxq: pointer to mailbox object
   *
   * This routine is invoked to issue a completion to a rcv'ed
   * ADISC or PDISC after the paused RPI has been resumed.
   **/
  static void
  lpfc_mbx_cmpl_resume_rpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
  {
  	struct lpfc_vport *vport;
  	struct lpfc_iocbq *elsiocb;
  	struct lpfc_nodelist *ndlp;
  	uint32_t cmd;
  
  	elsiocb = (struct lpfc_iocbq *)mboxq->context1;
  	ndlp = (struct lpfc_nodelist *) mboxq->context2;
  	vport = mboxq->vport;
  	cmd = elsiocb->drvrTimeout;
  
  	if (cmd == ELS_CMD_ADISC) {
  		lpfc_els_rsp_adisc_acc(vport, elsiocb, ndlp);
  	} else {
  		lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, elsiocb,
  			ndlp, NULL);
  	}
  	kfree(elsiocb);
  	mempool_free(mboxq, phba->mbox_mem_pool);
  }
  
  static int
  lpfc_rcv_padisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  		struct lpfc_iocbq *cmdiocb)
  {
  	struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_iocbq  *elsiocb;
  	struct lpfc_dmabuf *pcmd;
  	struct serv_parm   *sp;
  	struct lpfc_name   *pnn, *ppn;
  	struct ls_rjt stat;
  	ADISC *ap;
  	IOCB_t *icmd;
  	uint32_t *lp;
  	uint32_t cmd;
  
  	pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
  	lp = (uint32_t *) pcmd->virt;
  
  	cmd = *lp++;
  	if (cmd == ELS_CMD_ADISC) {
  		ap = (ADISC *) lp;
  		pnn = (struct lpfc_name *) & ap->nodeName;
  		ppn = (struct lpfc_name *) & ap->portName;
  	} else {
  		sp = (struct serv_parm *) lp;
  		pnn = (struct lpfc_name *) & sp->nodeName;
  		ppn = (struct lpfc_name *) & sp->portName;
  	}
  
  	icmd = &cmdiocb->iocb;
  	if (icmd->ulpStatus == 0 && lpfc_check_adisc(vport, ndlp, pnn, ppn)) {
  
  		/*
  		 * As soon as  we send ACC, the remote NPort can
  		 * start sending us data. Thus, for SLI4 we must
  		 * resume the RPI before the ACC goes out.
  		 */
  		if (vport->phba->sli_rev == LPFC_SLI_REV4) {
  			elsiocb = kmalloc(sizeof(struct lpfc_iocbq),
  				GFP_KERNEL);
  			if (elsiocb) {
  
  				/* Save info from cmd IOCB used in rsp */
  				memcpy((uint8_t *)elsiocb, (uint8_t *)cmdiocb,
  					sizeof(struct lpfc_iocbq));
  
  				/* Save the ELS cmd */
  				elsiocb->drvrTimeout = cmd;
  
  				lpfc_sli4_resume_rpi(ndlp,
  					lpfc_mbx_cmpl_resume_rpi, elsiocb);
  				goto out;
  			}
  		}
  
  		if (cmd == ELS_CMD_ADISC) {
  			lpfc_els_rsp_adisc_acc(vport, cmdiocb, ndlp);
  		} else {
  			lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb,
  				ndlp, NULL);
  		}
  out:
  		/* If we are authenticated, move to the proper state */
  		if (ndlp->nlp_type & NLP_FCP_TARGET)
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
  		else
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
  
  		return 1;
  	}
  	/* Reject this request because invalid parameters */
  	stat.un.b.lsRjtRsvd0 = 0;
  	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
  	stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
  	stat.un.b.vendorUnique = 0;
  	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
  
  	/* 1 sec timeout */
  	mod_timer(&ndlp->nlp_delayfunc, jiffies + msecs_to_jiffies(1000));
  
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag |= NLP_DELAY_TMO;
  	spin_unlock_irq(shost->host_lock);
  	ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
  	ndlp->nlp_prev_state = ndlp->nlp_state;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  	return 0;
  }
  
  static int
  lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  	      struct lpfc_iocbq *cmdiocb, uint32_t els_cmd)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba    *phba = vport->phba;
  	struct lpfc_vport **vports;
  	int i, active_vlink_present = 0 ;
  
  	/* Put ndlp in NPR state with 1 sec timeout for plogi, ACC logo */
  	/* Only call LOGO ACC for first LOGO, this avoids sending unnecessary
  	 * PLOGIs during LOGO storms from a device.
  	 */
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag |= NLP_LOGO_ACC;
  	spin_unlock_irq(shost->host_lock);
  	if (els_cmd == ELS_CMD_PRLO)
  		lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
  	else
  		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
  	if (ndlp->nlp_DID == Fabric_DID) {
  		if (vport->port_state <= LPFC_FDISC)
  			goto out;
  		lpfc_linkdown_port(vport);
  		spin_lock_irq(shost->host_lock);
  		vport->fc_flag |= FC_VPORT_LOGO_RCVD;
  		spin_unlock_irq(shost->host_lock);
  		vports = lpfc_create_vport_work_array(phba);
  		if (vports) {
  			for (i = 0; i <= phba->max_vports && vports[i] != NULL;
  					i++) {
  				if ((!(vports[i]->fc_flag &
  					FC_VPORT_LOGO_RCVD)) &&
  					(vports[i]->port_state > LPFC_FDISC)) {
  					active_vlink_present = 1;
  					break;
  				}
  			}
  			lpfc_destroy_vport_work_array(phba, vports);
  		}
  
  		/*
  		 * Don't re-instantiate if vport is marked for deletion.
  		 * If we are here first then vport_delete is going to wait
  		 * for discovery to complete.
  		 */
  		if (!(vport->load_flag & FC_UNLOADING) &&
  					active_vlink_present) {
  			/*
  			 * If there are other active VLinks present,
  			 * re-instantiate the Vlink using FDISC.
  			 */
  			mod_timer(&ndlp->nlp_delayfunc,
  				  jiffies + msecs_to_jiffies(1000));
  			spin_lock_irq(shost->host_lock);
  			ndlp->nlp_flag |= NLP_DELAY_TMO;
  			spin_unlock_irq(shost->host_lock);
  			ndlp->nlp_last_elscmd = ELS_CMD_FDISC;
  			vport->port_state = LPFC_FDISC;
  		} else {
  			spin_lock_irq(shost->host_lock);
  			phba->pport->fc_flag &= ~FC_LOGO_RCVD_DID_CHNG;
  			spin_unlock_irq(shost->host_lock);
  			lpfc_retry_pport_discovery(phba);
  		}
  	} else if ((!(ndlp->nlp_type & NLP_FABRIC) &&
  		((ndlp->nlp_type & NLP_FCP_TARGET) ||
  		!(ndlp->nlp_type & NLP_FCP_INITIATOR))) ||
  		(ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) {
  		/* Only try to re-login if this is NOT a Fabric Node */
  		mod_timer(&ndlp->nlp_delayfunc,
  			  jiffies + msecs_to_jiffies(1000 * 1));
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag |= NLP_DELAY_TMO;
  		spin_unlock_irq(shost->host_lock);
  
  		ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
  	}
  out:
  	ndlp->nlp_prev_state = ndlp->nlp_state;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag &= ~NLP_NPR_ADISC;
  	spin_unlock_irq(shost->host_lock);
  	/* The driver has to wait until the ACC completes before it continues
  	 * processing the LOGO.  The action will resume in
  	 * lpfc_cmpl_els_logo_acc routine. Since part of processing includes an
  	 * unreg_login, the driver waits so the ACC does not get aborted.
  	 */
  	return 0;
  }
  
  static void
  lpfc_rcv_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  	      struct lpfc_iocbq *cmdiocb)
  {
  	struct lpfc_hba  *phba = vport->phba;
  	struct lpfc_dmabuf *pcmd;
  	uint32_t *lp;
  	PRLI *npr;
  	struct fc_rport *rport = ndlp->rport;
  	u32 roles;
  
  	pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
  	lp = (uint32_t *) pcmd->virt;
  	npr = (PRLI *) ((uint8_t *) lp + sizeof (uint32_t));
  
  	ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
  	ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
  	ndlp->nlp_flag &= ~NLP_FIRSTBURST;
  	if ((npr->prliType == PRLI_FCP_TYPE) ||
  	    (npr->prliType == PRLI_NVME_TYPE)) {
  		if (npr->initiatorFunc) {
  			if (npr->prliType == PRLI_FCP_TYPE)
  				ndlp->nlp_type |= NLP_FCP_INITIATOR;
  			if (npr->prliType == PRLI_NVME_TYPE)
  				ndlp->nlp_type |= NLP_NVME_INITIATOR;
  		}
  		if (npr->targetFunc) {
  			if (npr->prliType == PRLI_FCP_TYPE)
  				ndlp->nlp_type |= NLP_FCP_TARGET;
  			if (npr->prliType == PRLI_NVME_TYPE)
  				ndlp->nlp_type |= NLP_NVME_TARGET;
  			if (npr->writeXferRdyDis)
  				ndlp->nlp_flag |= NLP_FIRSTBURST;
  		}
  		if (npr->Retry)
  			ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
  
  		/* If this driver is in nvme target mode, set the ndlp's fc4
  		 * type to NVME provided the PRLI response claims NVME FC4
  		 * type.  Target mode does not issue gft_id so doesn't get
  		 * the fc4 type set until now.
  		 */
  		if ((phba->nvmet_support) && (npr->prliType == PRLI_NVME_TYPE))
  			ndlp->nlp_fc4_type |= NLP_FC4_NVME;
  	}
  	if (rport) {
  		/* We need to update the rport role values */
  		roles = FC_RPORT_ROLE_UNKNOWN;
  		if (ndlp->nlp_type & NLP_FCP_INITIATOR)
  			roles |= FC_RPORT_ROLE_FCP_INITIATOR;
  		if (ndlp->nlp_type & NLP_FCP_TARGET)
  			roles |= FC_RPORT_ROLE_FCP_TARGET;
  
  		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
  			"rport rolechg:   role:x%x did:x%x flg:x%x",
  			roles, ndlp->nlp_DID, ndlp->nlp_flag);
  
  		if (phba->cfg_enable_fc4_type != LPFC_ENABLE_NVME)
  			fc_remote_port_rolechg(rport, roles);
  	}
  }
  
  static uint32_t
  lpfc_disc_set_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED)) {
  		ndlp->nlp_flag &= ~NLP_NPR_ADISC;
  		return 0;
  	}
  
  	if (!(vport->fc_flag & FC_PT2PT)) {
  		/* Check config parameter use-adisc or FCP-2 */
  		if ((vport->cfg_use_adisc && (vport->fc_flag & FC_RSCN_MODE)) ||
  		    ((ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) &&
  		     (ndlp->nlp_type & NLP_FCP_TARGET))) {
  			spin_lock_irq(shost->host_lock);
  			ndlp->nlp_flag |= NLP_NPR_ADISC;
  			spin_unlock_irq(shost->host_lock);
  			return 1;
  		}
  	}
  	ndlp->nlp_flag &= ~NLP_NPR_ADISC;
  	lpfc_unreg_rpi(vport, ndlp);
  	return 0;
  }
  
  /**
   * lpfc_release_rpi - Release a RPI by issuing unreg_login mailbox cmd.
   * @phba : Pointer to lpfc_hba structure.
   * @vport: Pointer to lpfc_vport structure.
   * @rpi  : rpi to be release.
   *
   * This function will send a unreg_login mailbox command to the firmware
   * to release a rpi.
   **/
  void
  lpfc_release_rpi(struct lpfc_hba *phba,
  		struct lpfc_vport *vport,
  		uint16_t rpi)
  {
  	LPFC_MBOXQ_t *pmb;
  	int rc;
  
  	pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool,
  			GFP_KERNEL);
  	if (!pmb)
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
  			"2796 mailbox memory allocation failed \n");
  	else {
  		lpfc_unreg_login(phba, vport->vpi, rpi, pmb);
  		pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
  		rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
  		if (rc == MBX_NOT_FINISHED)
  			mempool_free(pmb, phba->mbox_mem_pool);
  	}
  }
  
  static uint32_t
  lpfc_disc_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  		  void *arg, uint32_t evt)
  {
  	struct lpfc_hba *phba;
  	LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
  	uint16_t rpi;
  
  	phba = vport->phba;
  	/* Release the RPI if reglogin completing */
  	if (!(phba->pport->load_flag & FC_UNLOADING) &&
  		(evt == NLP_EVT_CMPL_REG_LOGIN) &&
  		(!pmb->u.mb.mbxStatus)) {
  		rpi = pmb->u.mb.un.varWords[0];
  		lpfc_release_rpi(phba, vport, rpi);
  	}
  	lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
  			 "0271 Illegal State Transition: node x%x "
  			 "event x%x, state x%x Data: x%x x%x\n",
  			 ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
  			 ndlp->nlp_flag);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_cmpl_plogi_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  		  void *arg, uint32_t evt)
  {
  	/* This transition is only legal if we previously
  	 * rcv'ed a PLOGI. Since we don't want 2 discovery threads
  	 * working on the same NPortID, do nothing for this thread
  	 * to stop it.
  	 */
  	if (!(ndlp->nlp_flag & NLP_RCV_PLOGI)) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
  			 "0272 Illegal State Transition: node x%x "
  			 "event x%x, state x%x Data: x%x x%x\n",
  			 ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
  			 ndlp->nlp_flag);
  	}
  	return ndlp->nlp_state;
  }
  
  /* Start of Discovery State Machine routines */
  
  static uint32_t
  lpfc_rcv_plogi_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb;
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  
  	if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
  		return ndlp->nlp_state;
  	}
  	return NLP_STE_FREED_NODE;
  }
  
  static uint32_t
  lpfc_rcv_els_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	lpfc_issue_els_logo(vport, ndlp, 0);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag |= NLP_LOGO_ACC;
  	spin_unlock_irq(shost->host_lock);
  	lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
  
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_cmpl_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	return NLP_STE_FREED_NODE;
  }
  
  static uint32_t
  lpfc_device_rm_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	return NLP_STE_FREED_NODE;
  }
  
  static uint32_t
  lpfc_device_recov_unused_node(struct lpfc_vport *vport,
  			struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba   *phba = vport->phba;
  	struct lpfc_iocbq *cmdiocb = arg;
  	struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
  	uint32_t *lp = (uint32_t *) pcmd->virt;
  	struct serv_parm *sp = (struct serv_parm *) (lp + 1);
  	struct ls_rjt stat;
  	int port_cmp;
  
  	memset(&stat, 0, sizeof (struct ls_rjt));
  
  	/* For a PLOGI, we only accept if our portname is less
  	 * than the remote portname.
  	 */
  	phba->fc_stat.elsLogiCol++;
  	port_cmp = memcmp(&vport->fc_portname, &sp->portName,
  			  sizeof(struct lpfc_name));
  
  	if (port_cmp >= 0) {
  		/* Reject this request because the remote node will accept
  		   ours */
  		stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
  		stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
  		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
  			NULL);
  	} else {
  		if (lpfc_rcv_plogi(vport, ndlp, cmdiocb) &&
  		    (ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
  		    (vport->num_disc_nodes)) {
  			spin_lock_irq(shost->host_lock);
  			ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
  			spin_unlock_irq(shost->host_lock);
  			/* 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);
  			}
  		}
  	} /* If our portname was less */
  
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prli_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  	struct ls_rjt     stat;
  
  	memset(&stat, 0, sizeof (struct ls_rjt));
  	stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
  	stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
  	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  				/* software abort outstanding PLOGI */
  	lpfc_els_abort(vport->phba, ndlp);
  
  	lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_els_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba   *phba = vport->phba;
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	/* software abort outstanding PLOGI */
  	lpfc_els_abort(phba, ndlp);
  
  	if (evt == NLP_EVT_RCV_LOGO) {
  		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
  	} else {
  		lpfc_issue_els_logo(vport, ndlp, 0);
  	}
  
  	/* Put ndlp in npr state set plogi timer for 1 sec */
  	mod_timer(&ndlp->nlp_delayfunc, jiffies + msecs_to_jiffies(1000 * 1));
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag |= NLP_DELAY_TMO;
  	spin_unlock_irq(shost->host_lock);
  	ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
  	ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_cmpl_plogi_plogi_issue(struct lpfc_vport *vport,
  			    struct lpfc_nodelist *ndlp,
  			    void *arg,
  			    uint32_t evt)
  {
  	struct lpfc_hba    *phba = vport->phba;
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_iocbq  *cmdiocb, *rspiocb;
  	struct lpfc_dmabuf *pcmd, *prsp, *mp;
  	uint32_t *lp;
  	uint32_t vid, flag;
  	IOCB_t *irsp;
  	struct serv_parm *sp;
  	uint32_t ed_tov;
  	LPFC_MBOXQ_t *mbox;
  	int rc;
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  	rspiocb = cmdiocb->context_un.rsp_iocb;
  
  	if (ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
  		/* Recovery from PLOGI collision logic */
  		return ndlp->nlp_state;
  	}
  
  	irsp = &rspiocb->iocb;
  
  	if (irsp->ulpStatus)
  		goto out;
  
  	pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
  
  	prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
  	if (!prsp)
  		goto out;
  
  	lp = (uint32_t *) prsp->virt;
  	sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
  
  	/* Some switches have FDMI servers returning 0 for WWN */
  	if ((ndlp->nlp_DID != FDMI_DID) &&
  		(wwn_to_u64(sp->portName.u.wwn) == 0 ||
  		wwn_to_u64(sp->nodeName.u.wwn) == 0)) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
  				 "0142 PLOGI RSP: Invalid WWN.\n");
  		goto out;
  	}
  	if (!lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0))
  		goto out;
  	/* PLOGI chkparm OK */
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
  			 "0121 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
  			 ndlp->nlp_DID, ndlp->nlp_state,
  			 ndlp->nlp_flag, ndlp->nlp_rpi);
  	if (vport->cfg_fcp_class == 2 && (sp->cls2.classValid))
  		ndlp->nlp_fcp_info |= CLASS2;
  	else
  		ndlp->nlp_fcp_info |= CLASS3;
  
  	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;
  
  	if ((vport->fc_flag & FC_PT2PT) &&
  	    (vport->fc_flag & FC_PT2PT_PLOGI)) {
  		ed_tov = be32_to_cpu(sp->cmn.e_d_tov);
  		if (sp->cmn.edtovResolution) {
  			/* E_D_TOV ticks are in nanoseconds */
  			ed_tov = (phba->fc_edtov + 999999) / 1000000;
  		}
  
  		ndlp->nlp_flag &= ~NLP_SUPPRESS_RSP;
  		if ((phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) &&
  		    sp->cmn.valid_vendor_ver_level) {
  			vid = be32_to_cpu(sp->un.vv.vid);
  			flag = be32_to_cpu(sp->un.vv.flags);
  			if ((vid == LPFC_VV_EMLX_ID) &&
  			    (flag & LPFC_VV_SUPPRESS_RSP))
  				ndlp->nlp_flag |= NLP_SUPPRESS_RSP;
  		}
  
  		/*
  		 * Use the larger EDTOV
  		 * RATOV = 2 * EDTOV for pt-to-pt
  		 */
  		if (ed_tov > phba->fc_edtov)
  			phba->fc_edtov = ed_tov;
  		phba->fc_ratov = (2 * phba->fc_edtov) / 1000;
  
  		memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
  
  		/* Issue config_link / reg_vfi to account for updated TOV's */
  		if (phba->sli_rev == LPFC_SLI_REV4) {
  			lpfc_issue_reg_vfi(vport);
  		} else {
  			mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  			if (!mbox) {
  				lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
  						 "0133 PLOGI: no memory "
  						 "for config_link "
  						 "Data: x%x x%x x%x x%x\n",
  						 ndlp->nlp_DID, ndlp->nlp_state,
  						 ndlp->nlp_flag, ndlp->nlp_rpi);
  				goto out;
  			}
  
  			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) {
  				mempool_free(mbox, phba->mbox_mem_pool);
  				goto out;
  			}
  		}
  	}
  
  	lpfc_unreg_rpi(vport, ndlp);
  
  	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  	if (!mbox) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
  				 "0018 PLOGI: no memory for reg_login "
  				 "Data: x%x x%x x%x x%x\n",
  				 ndlp->nlp_DID, ndlp->nlp_state,
  				 ndlp->nlp_flag, ndlp->nlp_rpi);
  		goto out;
  	}
  
  	if (lpfc_reg_rpi(phba, vport->vpi, irsp->un.elsreq64.remoteID,
  			 (uint8_t *) sp, mbox, ndlp->nlp_rpi) == 0) {
  		switch (ndlp->nlp_DID) {
  		case NameServer_DID:
  			mbox->mbox_cmpl = lpfc_mbx_cmpl_ns_reg_login;
  			break;
  		case FDMI_DID:
  			mbox->mbox_cmpl = lpfc_mbx_cmpl_fdmi_reg_login;
  			break;
  		default:
  			ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
  			mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
  		}
  		mbox->context2 = lpfc_nlp_get(ndlp);
  		mbox->vport = vport;
  		if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
  		    != MBX_NOT_FINISHED) {
  			lpfc_nlp_set_state(vport, ndlp,
  					   NLP_STE_REG_LOGIN_ISSUE);
  			return ndlp->nlp_state;
  		}
  		if (ndlp->nlp_flag & NLP_REG_LOGIN_SEND)
  			ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
  		/* decrement node reference count to the failed mbox
  		 * command
  		 */
  		lpfc_nlp_put(ndlp);
  		mp = (struct lpfc_dmabuf *) mbox->context1;
  		lpfc_mbuf_free(phba, mp->virt, mp->phys);
  		kfree(mp);
  		mempool_free(mbox, phba->mbox_mem_pool);
  
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
  				 "0134 PLOGI: cannot issue reg_login "
  				 "Data: x%x x%x x%x x%x\n",
  				 ndlp->nlp_DID, ndlp->nlp_state,
  				 ndlp->nlp_flag, ndlp->nlp_rpi);
  	} else {
  		mempool_free(mbox, phba->mbox_mem_pool);
  
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
  				 "0135 PLOGI: cannot format reg_login "
  				 "Data: x%x x%x x%x x%x\n",
  				 ndlp->nlp_DID, ndlp->nlp_state,
  				 ndlp->nlp_flag, ndlp->nlp_rpi);
  	}
  
  
  out:
  	if (ndlp->nlp_DID == NameServer_DID) {
  		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
  				 "0261 Cannot Register NameServer login\n");
  	}
  
  	/*
  	** In case the node reference counter does not go to zero, ensure that
  	** the stale state for the node is not processed.
  	*/
  
  	ndlp->nlp_prev_state = ndlp->nlp_state;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag |= NLP_DEFER_RM;
  	spin_unlock_irq(shost->host_lock);
  	return NLP_STE_FREED_NODE;
  }
  
  static uint32_t
  lpfc_cmpl_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_cmpl_reglogin_plogi_issue(struct lpfc_vport *vport,
  	struct lpfc_nodelist *ndlp, void *arg, uint32_t evt)
  {
  	struct lpfc_hba *phba;
  	LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
  	MAILBOX_t *mb = &pmb->u.mb;
  	uint16_t rpi;
  
  	phba = vport->phba;
  	/* Release the RPI */
  	if (!(phba->pport->load_flag & FC_UNLOADING) &&
  		!mb->mbxStatus) {
  		rpi = pmb->u.mb.un.varWords[0];
  		lpfc_release_rpi(phba, vport, rpi);
  	}
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_device_rm_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag |= NLP_NODEV_REMOVE;
  		spin_unlock_irq(shost->host_lock);
  		return ndlp->nlp_state;
  	} else {
  		/* software abort outstanding PLOGI */
  		lpfc_els_abort(vport->phba, ndlp);
  
  		lpfc_drop_node(vport, ndlp);
  		return NLP_STE_FREED_NODE;
  	}
  }
  
  static uint32_t
  lpfc_device_recov_plogi_issue(struct lpfc_vport *vport,
  			      struct lpfc_nodelist *ndlp,
  			      void *arg,
  			      uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba  *phba = vport->phba;
  
  	/* Don't do anything that will mess up processing of the
  	 * previous RSCN.
  	 */
  	if (vport->fc_flag & FC_RSCN_DEFERRED)
  		return ndlp->nlp_state;
  
  	/* software abort outstanding PLOGI */
  	lpfc_els_abort(phba, ndlp);
  
  	ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
  	spin_unlock_irq(shost->host_lock);
  
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba   *phba = vport->phba;
  	struct lpfc_iocbq *cmdiocb;
  
  	/* software abort outstanding ADISC */
  	lpfc_els_abort(phba, ndlp);
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  
  	if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
  		if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
  			spin_lock_irq(shost->host_lock);
  			ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
  			spin_unlock_irq(shost->host_lock);
  			if (vport->num_disc_nodes)
  				lpfc_more_adisc(vport);
  		}
  		return ndlp->nlp_state;
  	}
  	ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
  	lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
  
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prli_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_logo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct lpfc_hba *phba = vport->phba;
  	struct lpfc_iocbq *cmdiocb;
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  
  	/* software abort outstanding ADISC */
  	lpfc_els_abort(phba, ndlp);
  
  	lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_padisc_adisc_issue(struct lpfc_vport *vport,
  			    struct lpfc_nodelist *ndlp,
  			    void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb;
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_padisc(vport, ndlp, cmdiocb);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prlo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb;
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  
  	/* Treat like rcv logo */
  	lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_cmpl_adisc_adisc_issue(struct lpfc_vport *vport,
  			    struct lpfc_nodelist *ndlp,
  			    void *arg, uint32_t evt)
  {
  	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba   *phba = vport->phba;
  	struct lpfc_iocbq *cmdiocb, *rspiocb;
  	IOCB_t *irsp;
  	ADISC *ap;
  	int rc;
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  	rspiocb = cmdiocb->context_un.rsp_iocb;
  
  	ap = (ADISC *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
  	irsp = &rspiocb->iocb;
  
  	if ((irsp->ulpStatus) ||
  	    (!lpfc_check_adisc(vport, ndlp, &ap->nodeName, &ap->portName))) {
  		/* 1 sec timeout */
  		mod_timer(&ndlp->nlp_delayfunc,
  			  jiffies + msecs_to_jiffies(1000));
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag |= NLP_DELAY_TMO;
  		spin_unlock_irq(shost->host_lock);
  		ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
  
  		memset(&ndlp->nlp_nodename, 0, sizeof(struct lpfc_name));
  		memset(&ndlp->nlp_portname, 0, sizeof(struct lpfc_name));
  
  		ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
  		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  		lpfc_unreg_rpi(vport, ndlp);
  		return ndlp->nlp_state;
  	}
  
  	if (phba->sli_rev == LPFC_SLI_REV4) {
  		rc = lpfc_sli4_resume_rpi(ndlp, NULL, NULL);
  		if (rc) {
  			/* Stay in state and retry. */
  			ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
  			return ndlp->nlp_state;
  		}
  	}
  
  	if (ndlp->nlp_type & NLP_FCP_TARGET) {
  		ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
  		lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
  	} else {
  		ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
  		lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
  	}
  
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_device_rm_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag |= NLP_NODEV_REMOVE;
  		spin_unlock_irq(shost->host_lock);
  		return ndlp->nlp_state;
  	} else {
  		/* software abort outstanding ADISC */
  		lpfc_els_abort(vport->phba, ndlp);
  
  		lpfc_drop_node(vport, ndlp);
  		return NLP_STE_FREED_NODE;
  	}
  }
  
  static uint32_t
  lpfc_device_recov_adisc_issue(struct lpfc_vport *vport,
  			      struct lpfc_nodelist *ndlp,
  			      void *arg,
  			      uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba  *phba = vport->phba;
  
  	/* Don't do anything that will mess up processing of the
  	 * previous RSCN.
  	 */
  	if (vport->fc_flag & FC_RSCN_DEFERRED)
  		return ndlp->nlp_state;
  
  	/* software abort outstanding ADISC */
  	lpfc_els_abort(phba, ndlp);
  
  	ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
  	spin_unlock_irq(shost->host_lock);
  	lpfc_disc_set_adisc(vport, ndlp);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_plogi_reglogin_issue(struct lpfc_vport *vport,
  			      struct lpfc_nodelist *ndlp,
  			      void *arg,
  			      uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_plogi(vport, ndlp, cmdiocb);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prli_reglogin_issue(struct lpfc_vport *vport,
  			     struct lpfc_nodelist *ndlp,
  			     void *arg,
  			     uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  	struct ls_rjt     stat;
  
  	if (vport->phba->nvmet_support) {
  		/* NVME Target mode.  Handle and respond to the PRLI and
  		 * transition to UNMAPPED provided the RPI has completed
  		 * registration.
  		 */
  		if (ndlp->nlp_flag & NLP_RPI_REGISTERED) {
  			lpfc_rcv_prli(vport, ndlp, cmdiocb);
  			lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
  		} else {
  			/* RPI registration has not completed. Reject the PRLI
  			 * to prevent an illegal state transition when the
  			 * rpi registration does complete.
  			 */
  			lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME_DISC,
  					 "6115 NVMET ndlp rpi %d state "
  					 "unknown, state x%x flags x%08x\n",
  					 ndlp->nlp_rpi, ndlp->nlp_state,
  					 ndlp->nlp_flag);
  			memset(&stat, 0, sizeof(struct ls_rjt));
  			stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
  			stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
  			lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
  					    ndlp, NULL);
  		}
  	} else {
  		/* Initiator mode. */
  		lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
  	}
  
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_logo_reglogin_issue(struct lpfc_vport *vport,
  			     struct lpfc_nodelist *ndlp,
  			     void *arg,
  			     uint32_t evt)
  {
  	struct lpfc_hba   *phba = vport->phba;
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  	LPFC_MBOXQ_t	  *mb;
  	LPFC_MBOXQ_t	  *nextmb;
  	struct lpfc_dmabuf *mp;
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  
  	/* cleanup any ndlp on mbox q waiting for reglogin cmpl */
  	if ((mb = phba->sli.mbox_active)) {
  		if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
  		   (ndlp == (struct lpfc_nodelist *) mb->context2)) {
  			ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
  			lpfc_nlp_put(ndlp);
  			mb->context2 = NULL;
  			mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
  		}
  	}
  
  	spin_lock_irq(&phba->hbalock);
  	list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
  		if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
  		   (ndlp == (struct lpfc_nodelist *) mb->context2)) {
  			mp = (struct lpfc_dmabuf *) (mb->context1);
  			if (mp) {
  				__lpfc_mbuf_free(phba, mp->virt, mp->phys);
  				kfree(mp);
  			}
  			ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
  			lpfc_nlp_put(ndlp);
  			list_del(&mb->list);
  			phba->sli.mboxq_cnt--;
  			mempool_free(mb, phba->mbox_mem_pool);
  		}
  	}
  	spin_unlock_irq(&phba->hbalock);
  
  	lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_padisc_reglogin_issue(struct lpfc_vport *vport,
  			       struct lpfc_nodelist *ndlp,
  			       void *arg,
  			       uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_padisc(vport, ndlp, cmdiocb);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prlo_reglogin_issue(struct lpfc_vport *vport,
  			     struct lpfc_nodelist *ndlp,
  			     void *arg,
  			     uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb;
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  	lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_vport *vport,
  				  struct lpfc_nodelist *ndlp,
  				  void *arg,
  				  uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba *phba = vport->phba;
  	LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
  	MAILBOX_t *mb = &pmb->u.mb;
  	uint32_t did  = mb->un.varWords[1];
  	int rc = 0;
  
  	if (mb->mbxStatus) {
  		/* RegLogin failed */
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
  				"0246 RegLogin failed Data: x%x x%x x%x x%x "
  				 "x%x\n",
  				 did, mb->mbxStatus, vport->port_state,
  				 mb->un.varRegLogin.vpi,
  				 mb->un.varRegLogin.rpi);
  		/*
  		 * If RegLogin failed due to lack of HBA resources do not
  		 * retry discovery.
  		 */
  		if (mb->mbxStatus == MBXERR_RPI_FULL) {
  			ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  			return ndlp->nlp_state;
  		}
  
  		/* Put ndlp in npr state set plogi timer for 1 sec */
  		mod_timer(&ndlp->nlp_delayfunc,
  			  jiffies + msecs_to_jiffies(1000 * 1));
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag |= NLP_DELAY_TMO;
  		spin_unlock_irq(shost->host_lock);
  		ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
  
  		lpfc_issue_els_logo(vport, ndlp, 0);
  		ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
  		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  		return ndlp->nlp_state;
  	}
  
  	/* SLI4 ports have preallocated logical rpis. */
  	if (phba->sli_rev < LPFC_SLI_REV4)
  		ndlp->nlp_rpi = mb->un.varWords[0];
  
  	ndlp->nlp_flag |= NLP_RPI_REGISTERED;
  
  	/* Only if we are not a fabric nport do we issue PRLI */
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  			 "3066 RegLogin Complete on x%x x%x x%x\n",
  			 did, ndlp->nlp_type, ndlp->nlp_fc4_type);
  	if (!(ndlp->nlp_type & NLP_FABRIC) &&
  	    (phba->nvmet_support == 0)) {
  		/* The driver supports FCP and NVME concurrently.  If the
  		 * ndlp's nlp_fc4_type is still zero, the driver doesn't
  		 * know what PRLI to send yet.  Figure that out now and
  		 * call PRLI depending on the outcome.
  		 */
  		if (vport->fc_flag & FC_PT2PT) {
  			/* If we are pt2pt, there is no Fabric to determine
  			 * the FC4 type of the remote nport. So if NVME
  			 * is configured try it.
  			 */
  			ndlp->nlp_fc4_type |= NLP_FC4_FCP;
  			if ((phba->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
  			     (phba->cfg_enable_fc4_type == LPFC_ENABLE_NVME)) {
  				ndlp->nlp_fc4_type |= NLP_FC4_NVME;
  				/* We need to update the localport also */
  				lpfc_nvme_update_localport(vport);
  			}
  
  		} else if (ndlp->nlp_fc4_type == 0) {
  			rc = lpfc_ns_cmd(vport, SLI_CTNS_GFT_ID,
  					 0, ndlp->nlp_DID);
  			return ndlp->nlp_state;
  		}
  
  		ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
  		lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
  		lpfc_issue_els_prli(vport, ndlp, 0);
  	} else {
  		if ((vport->fc_flag & FC_PT2PT) && phba->nvmet_support)
  			phba->targetport->port_id = vport->fc_myDID;
  
  		/* Only Fabric ports should transition. NVME target
  		 * must complete PRLI.
  		 */
  		if (ndlp->nlp_type & NLP_FABRIC) {
  			ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
  		}
  	}
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_device_rm_reglogin_issue(struct lpfc_vport *vport,
  			      struct lpfc_nodelist *ndlp,
  			      void *arg,
  			      uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag |= NLP_NODEV_REMOVE;
  		spin_unlock_irq(shost->host_lock);
  		return ndlp->nlp_state;
  	} else {
  		lpfc_drop_node(vport, ndlp);
  		return NLP_STE_FREED_NODE;
  	}
  }
  
  static uint32_t
  lpfc_device_recov_reglogin_issue(struct lpfc_vport *vport,
  				 struct lpfc_nodelist *ndlp,
  				 void *arg,
  				 uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	/* Don't do anything that will mess up processing of the
  	 * previous RSCN.
  	 */
  	if (vport->fc_flag & FC_RSCN_DEFERRED)
  		return ndlp->nlp_state;
  
  	ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  	spin_lock_irq(shost->host_lock);
  
  	/* If we are a target we won't immediately transition into PRLI,
  	 * so if REG_LOGIN already completed we don't need to ignore it.
  	 */
  	if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED) ||
  	    !vport->phba->nvmet_support)
  		ndlp->nlp_flag |= NLP_IGNR_REG_CMPL;
  
  	ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
  	spin_unlock_irq(shost->host_lock);
  	lpfc_disc_set_adisc(vport, ndlp);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_plogi_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb;
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_plogi(vport, ndlp, cmdiocb);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_logo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	/* Software abort outstanding PRLI before sending acc */
  	lpfc_els_abort(vport->phba, ndlp);
  
  	lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_padisc_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_padisc(vport, ndlp, cmdiocb);
  	return ndlp->nlp_state;
  }
  
  /* This routine is envoked when we rcv a PRLO request from a nport
   * we are logged into.  We should send back a PRLO rsp setting the
   * appropriate bits.
   * NEXT STATE = PRLI_ISSUE
   */
  static uint32_t
  lpfc_rcv_prlo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_cmpl_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_iocbq *cmdiocb, *rspiocb;
  	struct lpfc_hba   *phba = vport->phba;
  	IOCB_t *irsp;
  	PRLI *npr;
  	struct lpfc_nvme_prli *nvpr;
  	void *temp_ptr;
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  	rspiocb = cmdiocb->context_un.rsp_iocb;
  
  	/* A solicited PRLI is either FCP or NVME.  The PRLI cmd/rsp
  	 * format is different so NULL the two PRLI types so that the
  	 * driver correctly gets the correct context.
  	 */
  	npr = NULL;
  	nvpr = NULL;
  	temp_ptr = lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
  	if (cmdiocb->iocb_flag & LPFC_PRLI_FCP_REQ)
  		npr = (PRLI *) temp_ptr;
  	else if (cmdiocb->iocb_flag & LPFC_PRLI_NVME_REQ)
  		nvpr = (struct lpfc_nvme_prli *) temp_ptr;
  
  	irsp = &rspiocb->iocb;
  	if (irsp->ulpStatus) {
  		if ((vport->port_type == LPFC_NPIV_PORT) &&
  		    vport->cfg_restrict_login) {
  			goto out;
  		}
  
  		/* The LS Req had some error.  Don't let this be a
  		 * target.
  		 */
  		if ((ndlp->fc4_prli_sent == 1) &&
  		    (ndlp->nlp_state == NLP_STE_PRLI_ISSUE) &&
  		    (ndlp->nlp_type & (NLP_FCP_TARGET | NLP_FCP_INITIATOR)))
  			/* The FCP PRLI completed successfully but
  			 * the NVME PRLI failed.  Since they are sent in
  			 * succession, allow the FCP to complete.
  			 */
  			goto out_err;
  
  		ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
  		ndlp->nlp_type |= NLP_FCP_INITIATOR;
  		lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
  		return ndlp->nlp_state;
  	}
  
  	/* Check out PRLI rsp */
  	ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
  	ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
  
  	/* NVME or FCP first burst must be negotiated for each PRLI. */
  	ndlp->nlp_flag &= ~NLP_FIRSTBURST;
  	ndlp->nvme_fb_size = 0;
  	if (npr && (npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
  	    (npr->prliType == PRLI_FCP_TYPE)) {
  		lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
  				 "6028 FCP NPR PRLI Cmpl Init %d Target %d\n",
  				 npr->initiatorFunc,
  				 npr->targetFunc);
  		if (npr->initiatorFunc)
  			ndlp->nlp_type |= NLP_FCP_INITIATOR;
  		if (npr->targetFunc) {
  			ndlp->nlp_type |= NLP_FCP_TARGET;
  			if (npr->writeXferRdyDis)
  				ndlp->nlp_flag |= NLP_FIRSTBURST;
  		}
  		if (npr->Retry)
  			ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
  
  		/* PRLI completed.  Decrement count. */
  		ndlp->fc4_prli_sent--;
  	} else if (nvpr &&
  		   (bf_get_be32(prli_acc_rsp_code, nvpr) ==
  		    PRLI_REQ_EXECUTED) &&
  		   (bf_get_be32(prli_type_code, nvpr) ==
  		    PRLI_NVME_TYPE)) {
  
  		/* Complete setting up the remote ndlp personality. */
  		if (bf_get_be32(prli_init, nvpr))
  			ndlp->nlp_type |= NLP_NVME_INITIATOR;
  
  		/* Target driver cannot solicit NVME FB. */
  		if (bf_get_be32(prli_tgt, nvpr)) {
  			ndlp->nlp_type |= NLP_NVME_TARGET;
  			if ((bf_get_be32(prli_fba, nvpr) == 1) &&
  			    (bf_get_be32(prli_fb_sz, nvpr) > 0) &&
  			    (phba->cfg_nvme_enable_fb) &&
  			    (!phba->nvmet_support)) {
  				/* Both sides support FB. The target's first
  				 * burst size is a 512 byte encoded value.
  				 */
  				ndlp->nlp_flag |= NLP_FIRSTBURST;
  				ndlp->nvme_fb_size = bf_get_be32(prli_fb_sz,
  								 nvpr);
  			}
  		}
  
  		if (bf_get_be32(prli_recov, nvpr))
  			ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
  
  		lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
  				 "6029 NVME PRLI Cmpl w1 x%08x "
  				 "w4 x%08x w5 x%08x flag x%x, "
  				 "fcp_info x%x nlp_type x%x\n",
  				 be32_to_cpu(nvpr->word1),
  				 be32_to_cpu(nvpr->word4),
  				 be32_to_cpu(nvpr->word5),
  				 ndlp->nlp_flag, ndlp->nlp_fcp_info,
  				 ndlp->nlp_type);
  		/* PRLI completed.  Decrement count. */
  		ndlp->fc4_prli_sent--;
  	}
  	if (!(ndlp->nlp_type & NLP_FCP_TARGET) &&
  	    (vport->port_type == LPFC_NPIV_PORT) &&
  	     vport->cfg_restrict_login) {
  out:
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag |= NLP_TARGET_REMOVE;
  		spin_unlock_irq(shost->host_lock);
  		lpfc_issue_els_logo(vport, ndlp, 0);
  
  		ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
  		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  		return ndlp->nlp_state;
  	}
  
  out_err:
  	/* The ndlp state cannot move to MAPPED or UNMAPPED before all PRLIs
  	 * are complete.
  	 */
  	if (ndlp->fc4_prli_sent == 0) {
  		ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
  		if (ndlp->nlp_type & (NLP_FCP_TARGET | NLP_NVME_TARGET))
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
  		else
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
  	} else
  		lpfc_printf_vlog(vport,
  				 KERN_INFO, LOG_ELS,
  				 "3067 PRLI's still outstanding "
  				 "on x%06x - count %d, Pend Node Mode "
  				 "transition...\n",
  				 ndlp->nlp_DID, ndlp->fc4_prli_sent);
  
  	return ndlp->nlp_state;
  }
  
  /*! lpfc_device_rm_prli_issue
   *
   * \pre
   * \post
   * \param   phba
   * \param   ndlp
   * \param   arg
   * \param   evt
   * \return  uint32_t
   *
   * \b Description:
   *    This routine is envoked when we a request to remove a nport we are in the
   *    process of PRLIing. We should software abort outstanding prli, unreg
   *    login, send a logout. We will change node state to UNUSED_NODE, put it
   *    on plogi list so it can be freed when LOGO completes.
   *
   */
  
  static uint32_t
  lpfc_device_rm_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag |= NLP_NODEV_REMOVE;
  		spin_unlock_irq(shost->host_lock);
  		return ndlp->nlp_state;
  	} else {
  		/* software abort outstanding PLOGI */
  		lpfc_els_abort(vport->phba, ndlp);
  
  		lpfc_drop_node(vport, ndlp);
  		return NLP_STE_FREED_NODE;
  	}
  }
  
  
  /*! lpfc_device_recov_prli_issue
   *
   * \pre
   * \post
   * \param   phba
   * \param   ndlp
   * \param   arg
   * \param   evt
   * \return  uint32_t
   *
   * \b Description:
   *    The routine is envoked when the state of a device is unknown, like
   *    during a link down. We should remove the nodelist entry from the
   *    unmapped list, issue a UNREG_LOGIN, do a software abort of the
   *    outstanding PRLI command, then free the node entry.
   */
  static uint32_t
  lpfc_device_recov_prli_issue(struct lpfc_vport *vport,
  			     struct lpfc_nodelist *ndlp,
  			     void *arg,
  			     uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba  *phba = vport->phba;
  
  	/* Don't do anything that will mess up processing of the
  	 * previous RSCN.
  	 */
  	if (vport->fc_flag & FC_RSCN_DEFERRED)
  		return ndlp->nlp_state;
  
  	/* software abort outstanding PRLI */
  	lpfc_els_abort(phba, ndlp);
  
  	ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
  	spin_unlock_irq(shost->host_lock);
  	lpfc_disc_set_adisc(vport, ndlp);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_plogi_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *)arg;
  	struct ls_rjt     stat;
  
  	memset(&stat, 0, sizeof(struct ls_rjt));
  	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
  	stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
  	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prli_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *)arg;
  	struct ls_rjt     stat;
  
  	memset(&stat, 0, sizeof(struct ls_rjt));
  	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
  	stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
  	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_logo_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *)arg;
  
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag |= NLP_LOGO_ACC;
  	spin_unlock_irq(shost->host_lock);
  	lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_padisc_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *)arg;
  	struct ls_rjt     stat;
  
  	memset(&stat, 0, sizeof(struct ls_rjt));
  	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
  	stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
  	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prlo_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *)arg;
  	struct ls_rjt     stat;
  
  	memset(&stat, 0, sizeof(struct ls_rjt));
  	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
  	stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
  	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_cmpl_logo_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	ndlp->nlp_prev_state = NLP_STE_LOGO_ISSUE;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
  	spin_unlock_irq(shost->host_lock);
  	lpfc_disc_set_adisc(vport, ndlp);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_device_rm_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	/*
  	 * Take no action.  If a LOGO is outstanding, then possibly DevLoss has
  	 * timed out and is calling for Device Remove.  In this case, the LOGO
  	 * must be allowed to complete in state LOGO_ISSUE so that the rpi
  	 * and other NLP flags are correctly cleaned up.
  	 */
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_device_recov_logo_issue(struct lpfc_vport *vport,
  			     struct lpfc_nodelist *ndlp,
  			     void *arg, uint32_t evt)
  {
  	/*
  	 * Device Recovery events have no meaning for a node with a LOGO
  	 * outstanding.  The LOGO has to complete first and handle the
  	 * node from that point.
  	 */
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_plogi_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_plogi(vport, ndlp, cmdiocb);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prli_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_prli(vport, ndlp, cmdiocb);
  	lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_logo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_padisc_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_padisc(vport, ndlp, cmdiocb);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prlo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_device_recov_unmap_node(struct lpfc_vport *vport,
  			     struct lpfc_nodelist *ndlp,
  			     void *arg,
  			     uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	ndlp->nlp_prev_state = NLP_STE_UNMAPPED_NODE;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
  	spin_unlock_irq(shost->host_lock);
  	lpfc_disc_set_adisc(vport, ndlp);
  
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_plogi_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_plogi(vport, ndlp, cmdiocb);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prli_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_logo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_padisc_mapped_node(struct lpfc_vport *vport,
  			    struct lpfc_nodelist *ndlp,
  			    void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_padisc(vport, ndlp, cmdiocb);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prlo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			  void *arg, uint32_t evt)
  {
  	struct lpfc_hba  *phba = vport->phba;
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	/* flush the target */
  	lpfc_sli_abort_iocb(vport, &phba->sli.sli3_ring[LPFC_FCP_RING],
  			    ndlp->nlp_sid, 0, LPFC_CTX_TGT);
  
  	/* Treat like rcv logo */
  	lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_device_recov_mapped_node(struct lpfc_vport *vport,
  			      struct lpfc_nodelist *ndlp,
  			      void *arg,
  			      uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	ndlp->nlp_prev_state = NLP_STE_MAPPED_NODE;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
  	spin_unlock_irq(shost->host_lock);
  	lpfc_disc_set_adisc(vport, ndlp);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			void *arg, uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_iocbq *cmdiocb  = (struct lpfc_iocbq *) arg;
  
  	/* Ignore PLOGI if we have an outstanding LOGO */
  	if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC))
  		return ndlp->nlp_state;
  	if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
  		lpfc_cancel_retry_delay_tmo(vport, ndlp);
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC);
  		spin_unlock_irq(shost->host_lock);
  	} else if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
  		/* send PLOGI immediately, move to PLOGI issue state */
  		if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
  			ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
  			lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
  		}
  	}
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  		       void *arg, uint32_t evt)
  {
  	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  	struct ls_rjt     stat;
  
  	memset(&stat, 0, sizeof (struct ls_rjt));
  	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
  	stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
  	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
  
  	if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
  		if (ndlp->nlp_flag & NLP_NPR_ADISC) {
  			spin_lock_irq(shost->host_lock);
  			ndlp->nlp_flag &= ~NLP_NPR_ADISC;
  			ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
  			spin_unlock_irq(shost->host_lock);
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
  			lpfc_issue_els_adisc(vport, ndlp, 0);
  		} else {
  			ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
  			lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
  		}
  	}
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_logo_npr_node(struct lpfc_vport *vport,  struct lpfc_nodelist *ndlp,
  		       void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	lpfc_rcv_padisc(vport, ndlp, cmdiocb);
  	/*
  	 * Do not start discovery if discovery is about to start
  	 * or discovery in progress for this node. Starting discovery
  	 * here will affect the counting of discovery threads.
  	 */
  	if (!(ndlp->nlp_flag & NLP_DELAY_TMO) &&
  	    !(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
  		if (ndlp->nlp_flag & NLP_NPR_ADISC) {
  			ndlp->nlp_flag &= ~NLP_NPR_ADISC;
  			ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
  			lpfc_issue_els_adisc(vport, ndlp, 0);
  		} else {
  			ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
  			lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
  		}
  	}
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_rcv_prlo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  		       void *arg, uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
  
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag |= NLP_LOGO_ACC;
  	spin_unlock_irq(shost->host_lock);
  
  	lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
  
  	if ((ndlp->nlp_flag & NLP_DELAY_TMO) == 0) {
  		mod_timer(&ndlp->nlp_delayfunc,
  			  jiffies + msecs_to_jiffies(1000 * 1));
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag |= NLP_DELAY_TMO;
  		ndlp->nlp_flag &= ~NLP_NPR_ADISC;
  		spin_unlock_irq(shost->host_lock);
  		ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
  	} else {
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag &= ~NLP_NPR_ADISC;
  		spin_unlock_irq(shost->host_lock);
  	}
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_cmpl_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb, *rspiocb;
  	IOCB_t *irsp;
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  	rspiocb = cmdiocb->context_un.rsp_iocb;
  
  	irsp = &rspiocb->iocb;
  	if (irsp->ulpStatus) {
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag |= NLP_DEFER_RM;
  		spin_unlock_irq(shost->host_lock);
  		return NLP_STE_FREED_NODE;
  	}
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_cmpl_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb, *rspiocb;
  	IOCB_t *irsp;
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  	rspiocb = cmdiocb->context_un.rsp_iocb;
  
  	irsp = &rspiocb->iocb;
  	if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
  		lpfc_drop_node(vport, ndlp);
  		return NLP_STE_FREED_NODE;
  	}
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_cmpl_logo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			void *arg, uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	/* For the fabric port just clear the fc flags. */
  	if (ndlp->nlp_DID == Fabric_DID) {
  		spin_lock_irq(shost->host_lock);
  		vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
  		spin_unlock_irq(shost->host_lock);
  	}
  	lpfc_unreg_rpi(vport, ndlp);
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_cmpl_adisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			 void *arg, uint32_t evt)
  {
  	struct lpfc_iocbq *cmdiocb, *rspiocb;
  	IOCB_t *irsp;
  
  	cmdiocb = (struct lpfc_iocbq *) arg;
  	rspiocb = cmdiocb->context_un.rsp_iocb;
  
  	irsp = &rspiocb->iocb;
  	if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
  		lpfc_drop_node(vport, ndlp);
  		return NLP_STE_FREED_NODE;
  	}
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_cmpl_reglogin_npr_node(struct lpfc_vport *vport,
  			    struct lpfc_nodelist *ndlp,
  			    void *arg, uint32_t evt)
  {
  	LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
  	MAILBOX_t    *mb = &pmb->u.mb;
  
  	if (!mb->mbxStatus) {
  		/* SLI4 ports have preallocated logical rpis. */
  		if (vport->phba->sli_rev < LPFC_SLI_REV4)
  			ndlp->nlp_rpi = mb->un.varWords[0];
  		ndlp->nlp_flag |= NLP_RPI_REGISTERED;
  		if (ndlp->nlp_flag & NLP_LOGO_ACC) {
  			lpfc_unreg_rpi(vport, ndlp);
  		}
  	} else {
  		if (ndlp->nlp_flag & NLP_NODEV_REMOVE) {
  			lpfc_drop_node(vport, ndlp);
  			return NLP_STE_FREED_NODE;
  		}
  	}
  	return ndlp->nlp_state;
  }
  
  static uint32_t
  lpfc_device_rm_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			void *arg, uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
  		spin_lock_irq(shost->host_lock);
  		ndlp->nlp_flag |= NLP_NODEV_REMOVE;
  		spin_unlock_irq(shost->host_lock);
  		return ndlp->nlp_state;
  	}
  	lpfc_drop_node(vport, ndlp);
  	return NLP_STE_FREED_NODE;
  }
  
  static uint32_t
  lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			   void *arg, uint32_t evt)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	/* Don't do anything that will mess up processing of the
  	 * previous RSCN.
  	 */
  	if (vport->fc_flag & FC_RSCN_DEFERRED)
  		return ndlp->nlp_state;
  
  	lpfc_cancel_retry_delay_tmo(vport, ndlp);
  	spin_lock_irq(shost->host_lock);
  	ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
  	spin_unlock_irq(shost->host_lock);
  	return ndlp->nlp_state;
  }
  
  
  /* This next section defines the NPort Discovery State Machine */
  
  /* There are 4 different double linked lists nodelist entries can reside on.
   * The plogi list and adisc list are used when Link Up discovery or RSCN
   * processing is needed. Each list holds the nodes that we will send PLOGI
   * or ADISC on. These lists will keep track of what nodes will be effected
   * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up).
   * The unmapped_list will contain all nodes that we have successfully logged
   * into at the Fibre Channel level. The mapped_list will contain all nodes
   * that are mapped FCP targets.
   */
  /*
   * The bind list is a list of undiscovered (potentially non-existent) nodes
   * that we have saved binding information on. This information is used when
   * nodes transition from the unmapped to the mapped list.
   */
  /* For UNUSED_NODE state, the node has just been allocated .
   * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
   * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
   * and put on the unmapped list. For ADISC processing, the node is taken off
   * the ADISC list and placed on either the mapped or unmapped list (depending
   * on its previous state). Once on the unmapped list, a PRLI is issued and the
   * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
   * changed to UNMAPPED_NODE. If the completion indicates a mapped
   * node, the node is taken off the unmapped list. The binding list is checked
   * for a valid binding, or a binding is automatically assigned. If binding
   * assignment is unsuccessful, the node is left on the unmapped list. If
   * binding assignment is successful, the associated binding list entry (if
   * any) is removed, and the node is placed on the mapped list.
   */
  /*
   * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
   * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
   * expire, all effected nodes will receive a DEVICE_RM event.
   */
  /*
   * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
   * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
   * check, additional nodes may be added or removed (via DEVICE_RM) to / from
   * the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
   * we will first process the ADISC list.  32 entries are processed initially and
   * ADISC is initited for each one.  Completions / Events for each node are
   * funnelled thru the state machine.  As each node finishes ADISC processing, it
   * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
   * waiting, and the ADISC list count is identically 0, then we are done. For
   * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
   * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
   * list.  32 entries are processed initially and PLOGI is initited for each one.
   * Completions / Events for each node are funnelled thru the state machine.  As
   * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
   * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
   * indentically 0, then we are done. We have now completed discovery / RSCN
   * handling. Upon completion, ALL nodes should be on either the mapped or
   * unmapped lists.
   */
  
  static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT])
       (struct lpfc_vport *, struct lpfc_nodelist *, void *, uint32_t) = {
  	/* Action routine                  Event       Current State  */
  	lpfc_rcv_plogi_unused_node,	/* RCV_PLOGI   UNUSED_NODE    */
  	lpfc_rcv_els_unused_node,	/* RCV_PRLI        */
  	lpfc_rcv_logo_unused_node,	/* RCV_LOGO        */
  	lpfc_rcv_els_unused_node,	/* RCV_ADISC       */
  	lpfc_rcv_els_unused_node,	/* RCV_PDISC       */
  	lpfc_rcv_els_unused_node,	/* RCV_PRLO        */
  	lpfc_disc_illegal,		/* CMPL_PLOGI      */
  	lpfc_disc_illegal,		/* CMPL_PRLI       */
  	lpfc_cmpl_logo_unused_node,	/* CMPL_LOGO       */
  	lpfc_disc_illegal,		/* CMPL_ADISC      */
  	lpfc_disc_illegal,		/* CMPL_REG_LOGIN  */
  	lpfc_device_rm_unused_node,	/* DEVICE_RM       */
  	lpfc_device_recov_unused_node,	/* DEVICE_RECOVERY */
  
  	lpfc_rcv_plogi_plogi_issue,	/* RCV_PLOGI   PLOGI_ISSUE    */
  	lpfc_rcv_prli_plogi_issue,	/* RCV_PRLI        */
  	lpfc_rcv_logo_plogi_issue,	/* RCV_LOGO        */
  	lpfc_rcv_els_plogi_issue,	/* RCV_ADISC       */
  	lpfc_rcv_els_plogi_issue,	/* RCV_PDISC       */
  	lpfc_rcv_els_plogi_issue,	/* RCV_PRLO        */
  	lpfc_cmpl_plogi_plogi_issue,	/* CMPL_PLOGI      */
  	lpfc_disc_illegal,		/* CMPL_PRLI       */
  	lpfc_cmpl_logo_plogi_issue,	/* CMPL_LOGO       */
  	lpfc_disc_illegal,		/* CMPL_ADISC      */
  	lpfc_cmpl_reglogin_plogi_issue,/* CMPL_REG_LOGIN  */
  	lpfc_device_rm_plogi_issue,	/* DEVICE_RM       */
  	lpfc_device_recov_plogi_issue,	/* DEVICE_RECOVERY */
  
  	lpfc_rcv_plogi_adisc_issue,	/* RCV_PLOGI   ADISC_ISSUE    */
  	lpfc_rcv_prli_adisc_issue,	/* RCV_PRLI        */
  	lpfc_rcv_logo_adisc_issue,	/* RCV_LOGO        */
  	lpfc_rcv_padisc_adisc_issue,	/* RCV_ADISC       */
  	lpfc_rcv_padisc_adisc_issue,	/* RCV_PDISC       */
  	lpfc_rcv_prlo_adisc_issue,	/* RCV_PRLO        */
  	lpfc_disc_illegal,		/* CMPL_PLOGI      */
  	lpfc_disc_illegal,		/* CMPL_PRLI       */
  	lpfc_disc_illegal,		/* CMPL_LOGO       */
  	lpfc_cmpl_adisc_adisc_issue,	/* CMPL_ADISC      */
  	lpfc_disc_illegal,		/* CMPL_REG_LOGIN  */
  	lpfc_device_rm_adisc_issue,	/* DEVICE_RM       */
  	lpfc_device_recov_adisc_issue,	/* DEVICE_RECOVERY */
  
  	lpfc_rcv_plogi_reglogin_issue,	/* RCV_PLOGI  REG_LOGIN_ISSUE */
  	lpfc_rcv_prli_reglogin_issue,	/* RCV_PLOGI       */
  	lpfc_rcv_logo_reglogin_issue,	/* RCV_LOGO        */
  	lpfc_rcv_padisc_reglogin_issue,	/* RCV_ADISC       */
  	lpfc_rcv_padisc_reglogin_issue,	/* RCV_PDISC       */
  	lpfc_rcv_prlo_reglogin_issue,	/* RCV_PRLO        */
  	lpfc_cmpl_plogi_illegal,	/* CMPL_PLOGI      */
  	lpfc_disc_illegal,		/* CMPL_PRLI       */
  	lpfc_disc_illegal,		/* CMPL_LOGO       */
  	lpfc_disc_illegal,		/* CMPL_ADISC      */
  	lpfc_cmpl_reglogin_reglogin_issue,/* CMPL_REG_LOGIN  */
  	lpfc_device_rm_reglogin_issue,	/* DEVICE_RM       */
  	lpfc_device_recov_reglogin_issue,/* DEVICE_RECOVERY */
  
  	lpfc_rcv_plogi_prli_issue,	/* RCV_PLOGI   PRLI_ISSUE     */
  	lpfc_rcv_prli_prli_issue,	/* RCV_PRLI        */
  	lpfc_rcv_logo_prli_issue,	/* RCV_LOGO        */
  	lpfc_rcv_padisc_prli_issue,	/* RCV_ADISC       */
  	lpfc_rcv_padisc_prli_issue,	/* RCV_PDISC       */
  	lpfc_rcv_prlo_prli_issue,	/* RCV_PRLO        */
  	lpfc_cmpl_plogi_illegal,	/* CMPL_PLOGI      */
  	lpfc_cmpl_prli_prli_issue,	/* CMPL_PRLI       */
  	lpfc_disc_illegal,		/* CMPL_LOGO       */
  	lpfc_disc_illegal,		/* CMPL_ADISC      */
  	lpfc_disc_illegal,		/* CMPL_REG_LOGIN  */
  	lpfc_device_rm_prli_issue,	/* DEVICE_RM       */
  	lpfc_device_recov_prli_issue,	/* DEVICE_RECOVERY */
  
  	lpfc_rcv_plogi_logo_issue,	/* RCV_PLOGI   LOGO_ISSUE     */
  	lpfc_rcv_prli_logo_issue,	/* RCV_PRLI        */
  	lpfc_rcv_logo_logo_issue,	/* RCV_LOGO        */
  	lpfc_rcv_padisc_logo_issue,	/* RCV_ADISC       */
  	lpfc_rcv_padisc_logo_issue,	/* RCV_PDISC       */
  	lpfc_rcv_prlo_logo_issue,	/* RCV_PRLO        */
  	lpfc_cmpl_plogi_illegal,	/* CMPL_PLOGI      */
  	lpfc_disc_illegal,		/* CMPL_PRLI       */
  	lpfc_cmpl_logo_logo_issue,	/* CMPL_LOGO       */
  	lpfc_disc_illegal,		/* CMPL_ADISC      */
  	lpfc_disc_illegal,		/* CMPL_REG_LOGIN  */
  	lpfc_device_rm_logo_issue,	/* DEVICE_RM       */
  	lpfc_device_recov_logo_issue,	/* DEVICE_RECOVERY */
  
  	lpfc_rcv_plogi_unmap_node,	/* RCV_PLOGI   UNMAPPED_NODE  */
  	lpfc_rcv_prli_unmap_node,	/* RCV_PRLI        */
  	lpfc_rcv_logo_unmap_node,	/* RCV_LOGO        */
  	lpfc_rcv_padisc_unmap_node,	/* RCV_ADISC       */
  	lpfc_rcv_padisc_unmap_node,	/* RCV_PDISC       */
  	lpfc_rcv_prlo_unmap_node,	/* RCV_PRLO        */
  	lpfc_disc_illegal,		/* CMPL_PLOGI      */
  	lpfc_disc_illegal,		/* CMPL_PRLI       */
  	lpfc_disc_illegal,		/* CMPL_LOGO       */
  	lpfc_disc_illegal,		/* CMPL_ADISC      */
  	lpfc_disc_illegal,		/* CMPL_REG_LOGIN  */
  	lpfc_disc_illegal,		/* DEVICE_RM       */
  	lpfc_device_recov_unmap_node,	/* DEVICE_RECOVERY */
  
  	lpfc_rcv_plogi_mapped_node,	/* RCV_PLOGI   MAPPED_NODE    */
  	lpfc_rcv_prli_mapped_node,	/* RCV_PRLI        */
  	lpfc_rcv_logo_mapped_node,	/* RCV_LOGO        */
  	lpfc_rcv_padisc_mapped_node,	/* RCV_ADISC       */
  	lpfc_rcv_padisc_mapped_node,	/* RCV_PDISC       */
  	lpfc_rcv_prlo_mapped_node,	/* RCV_PRLO        */
  	lpfc_disc_illegal,		/* CMPL_PLOGI      */
  	lpfc_disc_illegal,		/* CMPL_PRLI       */
  	lpfc_disc_illegal,		/* CMPL_LOGO       */
  	lpfc_disc_illegal,		/* CMPL_ADISC      */
  	lpfc_disc_illegal,		/* CMPL_REG_LOGIN  */
  	lpfc_disc_illegal,		/* DEVICE_RM       */
  	lpfc_device_recov_mapped_node,	/* DEVICE_RECOVERY */
  
  	lpfc_rcv_plogi_npr_node,        /* RCV_PLOGI   NPR_NODE    */
  	lpfc_rcv_prli_npr_node,         /* RCV_PRLI        */
  	lpfc_rcv_logo_npr_node,         /* RCV_LOGO        */
  	lpfc_rcv_padisc_npr_node,       /* RCV_ADISC       */
  	lpfc_rcv_padisc_npr_node,       /* RCV_PDISC       */
  	lpfc_rcv_prlo_npr_node,         /* RCV_PRLO        */
  	lpfc_cmpl_plogi_npr_node,	/* CMPL_PLOGI      */
  	lpfc_cmpl_prli_npr_node,	/* CMPL_PRLI       */
  	lpfc_cmpl_logo_npr_node,        /* CMPL_LOGO       */
  	lpfc_cmpl_adisc_npr_node,       /* CMPL_ADISC      */
  	lpfc_cmpl_reglogin_npr_node,    /* CMPL_REG_LOGIN  */
  	lpfc_device_rm_npr_node,        /* DEVICE_RM       */
  	lpfc_device_recov_npr_node,     /* DEVICE_RECOVERY */
  };
  
  int
  lpfc_disc_state_machine(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  			void *arg, uint32_t evt)
  {
  	uint32_t cur_state, rc;
  	uint32_t(*func) (struct lpfc_vport *, struct lpfc_nodelist *, void *,
  			 uint32_t);
  	uint32_t got_ndlp = 0;
  
  	if (lpfc_nlp_get(ndlp))
  		got_ndlp = 1;
  
  	cur_state = ndlp->nlp_state;
  
  	/* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  			 "0211 DSM in event x%x on NPort x%x in "
  			 "state %d Data: x%x\n",
  			 evt, ndlp->nlp_DID, cur_state, ndlp->nlp_flag);
  
  	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
  		 "DSM in:          evt:%d ste:%d did:x%x",
  		evt, cur_state, ndlp->nlp_DID);
  
  	func = lpfc_disc_action[(cur_state * NLP_EVT_MAX_EVENT) + evt];
  	rc = (func) (vport, ndlp, arg, evt);
  
  	/* DSM out state <rc> on NPort <nlp_DID> */
  	if (got_ndlp) {
  		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  			 "0212 DSM out state %d on NPort x%x Data: x%x\n",
  			 rc, ndlp->nlp_DID, ndlp->nlp_flag);
  
  		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
  			"DSM out:         ste:%d did:x%x flg:x%x",
  			rc, ndlp->nlp_DID, ndlp->nlp_flag);
  		/* Decrement the ndlp reference count held for this function */
  		lpfc_nlp_put(ndlp);
  	} else {
  		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  			"0213 DSM out state %d on NPort free\n", rc);
  
  		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
  			"DSM out:         ste:%d did:x%x flg:x%x",
  			rc, 0, 0);
  	}
  
  	return rc;
  }
  