text: /*******************************************************************
   * This file is part of the Emulex Linux Device Driver for         *
   * Fibre Channel Host Bus Adapters.                                *
   * Copyright (C) 2017-2020 Broadcom. All Rights Reserved. The term *
   * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
   * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   * EMULEX and SLI are trademarks of Emulex.                        *
   * www.broadcom.com                                                *
   * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   *                                                                 *
   * This program is free software; you can redistribute it and/or   *
   * modify it under the terms of version 2 of the GNU General       *
   * Public License as published by the Free Software Foundation.    *
   * This program is distributed in the hope that it will be useful. *
   * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
   * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
   * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
   * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
   * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
   * more details, a copy of which can be found in the file COPYING  *
   * included with this package.                                     *
   *******************************************************************/
  
  #include <linux/blkdev.h>
  #include <linux/delay.h>
  #include <linux/slab.h>
  #include <linux/pci.h>
  #include <linux/kthread.h>
  #include <linux/interrupt.h>
  #include <linux/lockdep.h>
  #include <linux/utsname.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 "lpfc_hw4.h"
  #include "lpfc_hw.h"
  #include "lpfc_nl.h"
  #include "lpfc_disc.h"
  #include "lpfc_sli.h"
  #include "lpfc_sli4.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"
  
  /* AlpaArray for assignment of scsid for scan-down and bind_method */
  static uint8_t lpfcAlpaArray[] = {
  	0xEF, 0xE8, 0xE4, 0xE2, 0xE1, 0xE0, 0xDC, 0xDA, 0xD9, 0xD6,
  	0xD5, 0xD4, 0xD3, 0xD2, 0xD1, 0xCE, 0xCD, 0xCC, 0xCB, 0xCA,
  	0xC9, 0xC7, 0xC6, 0xC5, 0xC3, 0xBC, 0xBA, 0xB9, 0xB6, 0xB5,
  	0xB4, 0xB3, 0xB2, 0xB1, 0xAE, 0xAD, 0xAC, 0xAB, 0xAA, 0xA9,
  	0xA7, 0xA6, 0xA5, 0xA3, 0x9F, 0x9E, 0x9D, 0x9B, 0x98, 0x97,
  	0x90, 0x8F, 0x88, 0x84, 0x82, 0x81, 0x80, 0x7C, 0x7A, 0x79,
  	0x76, 0x75, 0x74, 0x73, 0x72, 0x71, 0x6E, 0x6D, 0x6C, 0x6B,
  	0x6A, 0x69, 0x67, 0x66, 0x65, 0x63, 0x5C, 0x5A, 0x59, 0x56,
  	0x55, 0x54, 0x53, 0x52, 0x51, 0x4E, 0x4D, 0x4C, 0x4B, 0x4A,
  	0x49, 0x47, 0x46, 0x45, 0x43, 0x3C, 0x3A, 0x39, 0x36, 0x35,
  	0x34, 0x33, 0x32, 0x31, 0x2E, 0x2D, 0x2C, 0x2B, 0x2A, 0x29,
  	0x27, 0x26, 0x25, 0x23, 0x1F, 0x1E, 0x1D, 0x1B, 0x18, 0x17,
  	0x10, 0x0F, 0x08, 0x04, 0x02, 0x01
  };
  
  static void lpfc_disc_timeout_handler(struct lpfc_vport *);
  static void lpfc_disc_flush_list(struct lpfc_vport *vport);
  static void lpfc_unregister_fcfi_cmpl(struct lpfc_hba *, LPFC_MBOXQ_t *);
  static int lpfc_fcf_inuse(struct lpfc_hba *);
  static void lpfc_mbx_cmpl_read_sparam(struct lpfc_hba *, LPFC_MBOXQ_t *);
  
  static int
  lpfc_valid_xpt_node(struct lpfc_nodelist *ndlp)
  {
  	if (ndlp->nlp_fc4_type ||
  	    ndlp->nlp_DID == Fabric_DID ||
  	    ndlp->nlp_DID == NameServer_DID ||
  	    ndlp->nlp_DID == FDMI_DID)
  		return 1;
  	return 0;
  }
  /* The source of a terminate rport I/O is either a dev_loss_tmo
   * event or a call to fc_remove_host.  While the rport should be
   * valid during these downcalls, the transport can call twice
   * in a single event.  This routine provides somoe protection
   * as the NDLP isn't really free, just released to the pool.
   */
  static int
  lpfc_rport_invalid(struct fc_rport *rport)
  {
  	struct lpfc_rport_data *rdata;
  	struct lpfc_nodelist *ndlp;
  
  	if (!rport) {
  		pr_err("**** %s: NULL rport, exit.\n", __func__);
  		return -EINVAL;
  	}
  
  	rdata = rport->dd_data;
  	if (!rdata) {
  		pr_err("**** %s: NULL dd_data on rport %p SID x%x\n",
  		       __func__, rport, rport->scsi_target_id);
  		return -EINVAL;
  	}
  
  	ndlp = rdata->pnode;
  	if (!rdata->pnode) {
  		pr_err("**** %s: NULL ndlp on rport %p SID x%x\n",
  		       __func__, rport, rport->scsi_target_id);
  		return -EINVAL;
  	}
  
  	if (!ndlp->vport) {
  		pr_err("**** %s: Null vport on ndlp %p, DID x%x rport %p "
  		       "SID x%x\n", __func__, ndlp, ndlp->nlp_DID, rport,
  		       rport->scsi_target_id);
  		return -EINVAL;
  	}
  	return 0;
  }
  
  void
  lpfc_terminate_rport_io(struct fc_rport *rport)
  {
  	struct lpfc_rport_data *rdata;
  	struct lpfc_nodelist *ndlp;
  	struct lpfc_vport *vport;
  
  	if (lpfc_rport_invalid(rport))
  		return;
  
  	rdata = rport->dd_data;
  	ndlp = rdata->pnode;
  	vport = ndlp->vport;
  	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
  			      "rport terminate: sid:x%x did:x%x flg:x%x",
  			      ndlp->nlp_sid, ndlp->nlp_DID, ndlp->nlp_flag);
  
  	if (ndlp->nlp_sid != NLP_NO_SID)
  		lpfc_sli_abort_iocb(vport, ndlp->nlp_sid, 0, LPFC_CTX_TGT);
  }
  
  /*
   * This function will be called when dev_loss_tmo fire.
   */
  void
  lpfc_dev_loss_tmo_callbk(struct fc_rport *rport)
  {
  	struct lpfc_nodelist *ndlp;
  	struct lpfc_vport *vport;
  	struct lpfc_hba   *phba;
  	struct lpfc_work_evt *evtp;
  	unsigned long iflags;
  
  	ndlp = ((struct lpfc_rport_data *)rport->dd_data)->pnode;
  	if (!ndlp)
  		return;
  
  	vport = ndlp->vport;
  	phba  = vport->phba;
  
  	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
  		"rport devlosscb: sid:x%x did:x%x flg:x%x",
  		ndlp->nlp_sid, ndlp->nlp_DID, ndlp->nlp_flag);
  
  	lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
  			 "3181 dev_loss_callbk x%06x, rport %p flg x%x "
  			 "load_flag x%x refcnt %d\n",
  			 ndlp->nlp_DID, ndlp->rport, ndlp->nlp_flag,
  			 vport->load_flag, kref_read(&ndlp->kref));
  
  	/* Don't schedule a worker thread event if the vport is going down.
  	 * The teardown process cleans up the node via lpfc_drop_node.
  	 */
  	if (vport->load_flag & FC_UNLOADING) {
  		((struct lpfc_rport_data *)rport->dd_data)->pnode = NULL;
  		ndlp->rport = NULL;
  
  		ndlp->fc4_xpt_flags &= ~SCSI_XPT_REGD;
  
  		/* Remove the node reference from remote_port_add now.
  		 * The driver will not call remote_port_delete.
  		 */
  		lpfc_nlp_put(ndlp);
  		return;
  	}
  
  	if (ndlp->nlp_state == NLP_STE_MAPPED_NODE)
  		return;
  
  	if (rport->port_name != wwn_to_u64(ndlp->nlp_portname.u.wwn))
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "6789 rport name %llx != node port name %llx",
  				 rport->port_name,
  				 wwn_to_u64(ndlp->nlp_portname.u.wwn));
  
  	evtp = &ndlp->dev_loss_evt;
  
  	if (!list_empty(&evtp->evt_listp)) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "6790 rport name %llx dev_loss_evt pending\n",
  				 rport->port_name);
  		return;
  	}
  
  	spin_lock_irqsave(&ndlp->lock, iflags);
  	ndlp->nlp_flag |= NLP_IN_DEV_LOSS;
  	ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
  
  	/*
  	 * The backend does not expect any more calls associated with this
  	 * rport. Remove the association between rport and ndlp.
  	 */
  	ndlp->fc4_xpt_flags &= ~SCSI_XPT_REGD;
  	((struct lpfc_rport_data *)rport->dd_data)->pnode = NULL;
  	ndlp->rport = NULL;
  	spin_unlock_irqrestore(&ndlp->lock, iflags);
  
  	/* We need to hold the node by incrementing the reference
  	 * count until this queued work is done
  	 */
  	evtp->evt_arg1 = lpfc_nlp_get(ndlp);
  
  	spin_lock_irqsave(&phba->hbalock, iflags);
  	if (evtp->evt_arg1) {
  		evtp->evt = LPFC_EVT_DEV_LOSS;
  		list_add_tail(&evtp->evt_listp, &phba->work_list);
  		lpfc_worker_wake_up(phba);
  	}
  	spin_unlock_irqrestore(&phba->hbalock, iflags);
  
  	return;
  }
  
  /**
   * lpfc_dev_loss_tmo_handler - Remote node devloss timeout handler
   * @ndlp: Pointer to remote node object.
   *
   * This function is called from the worker thread when devloss timeout timer
   * expires. For SLI4 host, this routine shall return 1 when at lease one
   * remote node, including this @ndlp, is still in use of FCF; otherwise, this
   * routine shall return 0 when there is no remote node is still in use of FCF
   * when devloss timeout happened to this @ndlp.
   **/
  static int
  lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp)
  {
  	struct lpfc_vport *vport;
  	struct lpfc_hba   *phba;
  	uint8_t *name;
  	int warn_on = 0;
  	int fcf_inuse = 0;
  	unsigned long iflags;
  
  	vport = ndlp->vport;
  	name = (uint8_t *)&ndlp->nlp_portname;
  	phba = vport->phba;
  
  	spin_lock_irqsave(&ndlp->lock, iflags);
  	ndlp->nlp_flag &= ~NLP_IN_DEV_LOSS;
  	spin_unlock_irqrestore(&ndlp->lock, iflags);
  
  	if (phba->sli_rev == LPFC_SLI_REV4)
  		fcf_inuse = lpfc_fcf_inuse(phba);
  
  	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
  			      "rport devlosstmo:did:x%x type:x%x id:x%x",
  			      ndlp->nlp_DID, ndlp->nlp_type, ndlp->nlp_sid);
  
  	lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
  			 "3182 %s x%06x, nflag x%x xflags x%x refcnt %d\n",
  			 __func__, ndlp->nlp_DID, ndlp->nlp_flag,
  			 ndlp->fc4_xpt_flags, kref_read(&ndlp->kref));
  
  	/* If the driver is recovering the rport, ignore devloss. */
  	if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
  		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  				 "0284 Devloss timeout Ignored on "
  				 "WWPN %x:%x:%x:%x:%x:%x:%x:%x "
  				 "NPort x%x\n",
  				 *name, *(name+1), *(name+2), *(name+3),
  				 *(name+4), *(name+5), *(name+6), *(name+7),
  				 ndlp->nlp_DID);
  		return fcf_inuse;
  	}
  
  	/* Fabric nodes are done. */
  	if (ndlp->nlp_type & NLP_FABRIC) {
  		lpfc_nlp_put(ndlp);
  		return fcf_inuse;
  	}
  
  	if (ndlp->nlp_sid != NLP_NO_SID) {
  		warn_on = 1;
  		lpfc_sli_abort_iocb(vport, ndlp->nlp_sid, 0, LPFC_CTX_TGT);
  	}
  
  	if (warn_on) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "0203 Devloss timeout on "
  				 "WWPN %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x "
  				 "NPort x%06x Data: x%x x%x x%x\n",
  				 *name, *(name+1), *(name+2), *(name+3),
  				 *(name+4), *(name+5), *(name+6), *(name+7),
  				 ndlp->nlp_DID, ndlp->nlp_flag,
  				 ndlp->nlp_state, ndlp->nlp_rpi);
  	} else {
  		lpfc_printf_vlog(vport, KERN_INFO, LOG_TRACE_EVENT,
  				 "0204 Devloss timeout on "
  				 "WWPN %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x "
  				 "NPort x%06x Data: x%x x%x x%x\n",
  				 *name, *(name+1), *(name+2), *(name+3),
  				 *(name+4), *(name+5), *(name+6), *(name+7),
  				 ndlp->nlp_DID, ndlp->nlp_flag,
  				 ndlp->nlp_state, ndlp->nlp_rpi);
  	}
  
  	if (!(ndlp->fc4_xpt_flags & NVME_XPT_REGD))
  		lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
  
  	return fcf_inuse;
  }
  
  /**
   * lpfc_sli4_post_dev_loss_tmo_handler - SLI4 post devloss timeout handler
   * @phba: Pointer to hba context object.
   * @fcf_inuse: SLI4 FCF in-use state reported from devloss timeout handler.
   * @nlp_did: remote node identifer with devloss timeout.
   *
   * This function is called from the worker thread after invoking devloss
   * timeout handler and releasing the reference count for the ndlp with
   * which the devloss timeout was handled for SLI4 host. For the devloss
   * timeout of the last remote node which had been in use of FCF, when this
   * routine is invoked, it shall be guaranteed that none of the remote are
   * in-use of FCF. When devloss timeout to the last remote using the FCF,
   * if the FIP engine is neither in FCF table scan process nor roundrobin
   * failover process, the in-use FCF shall be unregistered. If the FIP
   * engine is in FCF discovery process, the devloss timeout state shall
   * be set for either the FCF table scan process or roundrobin failover
   * process to unregister the in-use FCF.
   **/
  static void
  lpfc_sli4_post_dev_loss_tmo_handler(struct lpfc_hba *phba, int fcf_inuse,
  				    uint32_t nlp_did)
  {
  	/* If devloss timeout happened to a remote node when FCF had no
  	 * longer been in-use, do nothing.
  	 */
  	if (!fcf_inuse)
  		return;
  
  	if ((phba->hba_flag & HBA_FIP_SUPPORT) && !lpfc_fcf_inuse(phba)) {
  		spin_lock_irq(&phba->hbalock);
  		if (phba->fcf.fcf_flag & FCF_DISCOVERY) {
  			if (phba->hba_flag & HBA_DEVLOSS_TMO) {
  				spin_unlock_irq(&phba->hbalock);
  				return;
  			}
  			phba->hba_flag |= HBA_DEVLOSS_TMO;
  			lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  					"2847 Last remote node (x%x) using "
  					"FCF devloss tmo\n", nlp_did);
  		}
  		if (phba->fcf.fcf_flag & FCF_REDISC_PROG) {
  			spin_unlock_irq(&phba->hbalock);
  			lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  					"2868 Devloss tmo to FCF rediscovery "
  					"in progress\n");
  			return;
  		}
  		if (!(phba->hba_flag & (FCF_TS_INPROG | FCF_RR_INPROG))) {
  			spin_unlock_irq(&phba->hbalock);
  			lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  					"2869 Devloss tmo to idle FIP engine, "
  					"unreg in-use FCF and rescan.\n");
  			/* Unregister in-use FCF and rescan */
  			lpfc_unregister_fcf_rescan(phba);
  			return;
  		}
  		spin_unlock_irq(&phba->hbalock);
  		if (phba->hba_flag & FCF_TS_INPROG)
  			lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  					"2870 FCF table scan in progress\n");
  		if (phba->hba_flag & FCF_RR_INPROG)
  			lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  					"2871 FLOGI roundrobin FCF failover "
  					"in progress\n");
  	}
  	lpfc_unregister_unused_fcf(phba);
  }
  
  /**
   * lpfc_alloc_fast_evt - Allocates data structure for posting event
   * @phba: Pointer to hba context object.
   *
   * This function is called from the functions which need to post
   * events from interrupt context. This function allocates data
   * structure required for posting event. It also keeps track of
   * number of events pending and prevent event storm when there are
   * too many events.
   **/
  struct lpfc_fast_path_event *
  lpfc_alloc_fast_evt(struct lpfc_hba *phba) {
  	struct lpfc_fast_path_event *ret;
  
  	/* If there are lot of fast event do not exhaust memory due to this */
  	if (atomic_read(&phba->fast_event_count) > LPFC_MAX_EVT_COUNT)
  		return NULL;
  
  	ret = kzalloc(sizeof(struct lpfc_fast_path_event),
  			GFP_ATOMIC);
  	if (ret) {
  		atomic_inc(&phba->fast_event_count);
  		INIT_LIST_HEAD(&ret->work_evt.evt_listp);
  		ret->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
  	}
  	return ret;
  }
  
  /**
   * lpfc_free_fast_evt - Frees event data structure
   * @phba: Pointer to hba context object.
   * @evt:  Event object which need to be freed.
   *
   * This function frees the data structure required for posting
   * events.
   **/
  void
  lpfc_free_fast_evt(struct lpfc_hba *phba,
  		struct lpfc_fast_path_event *evt) {
  
  	atomic_dec(&phba->fast_event_count);
  	kfree(evt);
  }
  
  /**
   * lpfc_send_fastpath_evt - Posts events generated from fast path
   * @phba: Pointer to hba context object.
   * @evtp: Event data structure.
   *
   * This function is called from worker thread, when the interrupt
   * context need to post an event. This function posts the event
   * to fc transport netlink interface.
   **/
  static void
  lpfc_send_fastpath_evt(struct lpfc_hba *phba,
  		struct lpfc_work_evt *evtp)
  {
  	unsigned long evt_category, evt_sub_category;
  	struct lpfc_fast_path_event *fast_evt_data;
  	char *evt_data;
  	uint32_t evt_data_size;
  	struct Scsi_Host *shost;
  
  	fast_evt_data = container_of(evtp, struct lpfc_fast_path_event,
  		work_evt);
  
  	evt_category = (unsigned long) fast_evt_data->un.fabric_evt.event_type;
  	evt_sub_category = (unsigned long) fast_evt_data->un.
  			fabric_evt.subcategory;
  	shost = lpfc_shost_from_vport(fast_evt_data->vport);
  	if (evt_category == FC_REG_FABRIC_EVENT) {
  		if (evt_sub_category == LPFC_EVENT_FCPRDCHKERR) {
  			evt_data = (char *) &fast_evt_data->un.read_check_error;
  			evt_data_size = sizeof(fast_evt_data->un.
  				read_check_error);
  		} else if ((evt_sub_category == LPFC_EVENT_FABRIC_BUSY) ||
  			(evt_sub_category == LPFC_EVENT_PORT_BUSY)) {
  			evt_data = (char *) &fast_evt_data->un.fabric_evt;
  			evt_data_size = sizeof(fast_evt_data->un.fabric_evt);
  		} else {
  			lpfc_free_fast_evt(phba, fast_evt_data);
  			return;
  		}
  	} else if (evt_category == FC_REG_SCSI_EVENT) {
  		switch (evt_sub_category) {
  		case LPFC_EVENT_QFULL:
  		case LPFC_EVENT_DEVBSY:
  			evt_data = (char *) &fast_evt_data->un.scsi_evt;
  			evt_data_size = sizeof(fast_evt_data->un.scsi_evt);
  			break;
  		case LPFC_EVENT_CHECK_COND:
  			evt_data = (char *) &fast_evt_data->un.check_cond_evt;
  			evt_data_size =  sizeof(fast_evt_data->un.
  				check_cond_evt);
  			break;
  		case LPFC_EVENT_VARQUEDEPTH:
  			evt_data = (char *) &fast_evt_data->un.queue_depth_evt;
  			evt_data_size = sizeof(fast_evt_data->un.
  				queue_depth_evt);
  			break;
  		default:
  			lpfc_free_fast_evt(phba, fast_evt_data);
  			return;
  		}
  	} else {
  		lpfc_free_fast_evt(phba, fast_evt_data);
  		return;
  	}
  
  	if (phba->cfg_enable_fc4_type != LPFC_ENABLE_NVME)
  		fc_host_post_vendor_event(shost,
  			fc_get_event_number(),
  			evt_data_size,
  			evt_data,
  			LPFC_NL_VENDOR_ID);
  
  	lpfc_free_fast_evt(phba, fast_evt_data);
  	return;
  }
  
  static void
  lpfc_work_list_done(struct lpfc_hba *phba)
  {
  	struct lpfc_work_evt  *evtp = NULL;
  	struct lpfc_nodelist  *ndlp;
  	int free_evt;
  	int fcf_inuse;
  	uint32_t nlp_did;
  
  	spin_lock_irq(&phba->hbalock);
  	while (!list_empty(&phba->work_list)) {
  		list_remove_head((&phba->work_list), evtp, typeof(*evtp),
  				 evt_listp);
  		spin_unlock_irq(&phba->hbalock);
  		free_evt = 1;
  		switch (evtp->evt) {
  		case LPFC_EVT_ELS_RETRY:
  			ndlp = (struct lpfc_nodelist *) (evtp->evt_arg1);
  			lpfc_els_retry_delay_handler(ndlp);
  			free_evt = 0; /* evt is part of ndlp */
  			/* decrement the node reference count held
  			 * for this queued work
  			 */
  			lpfc_nlp_put(ndlp);
  			break;
  		case LPFC_EVT_DEV_LOSS:
  			ndlp = (struct lpfc_nodelist *)(evtp->evt_arg1);
  			fcf_inuse = lpfc_dev_loss_tmo_handler(ndlp);
  			free_evt = 0;
  			/* decrement the node reference count held for
  			 * this queued work
  			 */
  			nlp_did = ndlp->nlp_DID;
  			lpfc_nlp_put(ndlp);
  			if (phba->sli_rev == LPFC_SLI_REV4)
  				lpfc_sli4_post_dev_loss_tmo_handler(phba,
  								    fcf_inuse,
  								    nlp_did);
  			break;
  		case LPFC_EVT_RECOVER_PORT:
  			ndlp = (struct lpfc_nodelist *)(evtp->evt_arg1);
  			lpfc_sli_abts_recover_port(ndlp->vport, ndlp);
  			free_evt = 0;
  			/* decrement the node reference count held for
  			 * this queued work
  			 */
  			lpfc_nlp_put(ndlp);
  			break;
  		case LPFC_EVT_ONLINE:
  			if (phba->link_state < LPFC_LINK_DOWN)
  				*(int *) (evtp->evt_arg1) = lpfc_online(phba);
  			else
  				*(int *) (evtp->evt_arg1) = 0;
  			complete((struct completion *)(evtp->evt_arg2));
  			break;
  		case LPFC_EVT_OFFLINE_PREP:
  			if (phba->link_state >= LPFC_LINK_DOWN)
  				lpfc_offline_prep(phba, LPFC_MBX_WAIT);
  			*(int *)(evtp->evt_arg1) = 0;
  			complete((struct completion *)(evtp->evt_arg2));
  			break;
  		case LPFC_EVT_OFFLINE:
  			lpfc_offline(phba);
  			lpfc_sli_brdrestart(phba);
  			*(int *)(evtp->evt_arg1) =
  				lpfc_sli_brdready(phba, HS_FFRDY | HS_MBRDY);
  			lpfc_unblock_mgmt_io(phba);
  			complete((struct completion *)(evtp->evt_arg2));
  			break;
  		case LPFC_EVT_WARM_START:
  			lpfc_offline(phba);
  			lpfc_reset_barrier(phba);
  			lpfc_sli_brdreset(phba);
  			lpfc_hba_down_post(phba);
  			*(int *)(evtp->evt_arg1) =
  				lpfc_sli_brdready(phba, HS_MBRDY);
  			lpfc_unblock_mgmt_io(phba);
  			complete((struct completion *)(evtp->evt_arg2));
  			break;
  		case LPFC_EVT_KILL:
  			lpfc_offline(phba);
  			*(int *)(evtp->evt_arg1)
  				= (phba->pport->stopped)
  				        ? 0 : lpfc_sli_brdkill(phba);
  			lpfc_unblock_mgmt_io(phba);
  			complete((struct completion *)(evtp->evt_arg2));
  			break;
  		case LPFC_EVT_FASTPATH_MGMT_EVT:
  			lpfc_send_fastpath_evt(phba, evtp);
  			free_evt = 0;
  			break;
  		case LPFC_EVT_RESET_HBA:
  			if (!(phba->pport->load_flag & FC_UNLOADING))
  				lpfc_reset_hba(phba);
  			break;
  		}
  		if (free_evt)
  			kfree(evtp);
  		spin_lock_irq(&phba->hbalock);
  	}
  	spin_unlock_irq(&phba->hbalock);
  
  }
  
  static void
  lpfc_work_done(struct lpfc_hba *phba)
  {
  	struct lpfc_sli_ring *pring;
  	uint32_t ha_copy, status, control, work_port_events;
  	struct lpfc_vport **vports;
  	struct lpfc_vport *vport;
  	int i;
  
  	spin_lock_irq(&phba->hbalock);
  	ha_copy = phba->work_ha;
  	phba->work_ha = 0;
  	spin_unlock_irq(&phba->hbalock);
  
  	/* First, try to post the next mailbox command to SLI4 device */
  	if (phba->pci_dev_grp == LPFC_PCI_DEV_OC)
  		lpfc_sli4_post_async_mbox(phba);
  
  	if (ha_copy & HA_ERATT)
  		/* Handle the error attention event */
  		lpfc_handle_eratt(phba);
  
  	if (ha_copy & HA_MBATT)
  		lpfc_sli_handle_mb_event(phba);
  
  	if (ha_copy & HA_LATT)
  		lpfc_handle_latt(phba);
  
  	/* Process SLI4 events */
  	if (phba->pci_dev_grp == LPFC_PCI_DEV_OC) {
  		if (phba->hba_flag & HBA_RRQ_ACTIVE)
  			lpfc_handle_rrq_active(phba);
  		if (phba->hba_flag & ELS_XRI_ABORT_EVENT)
  			lpfc_sli4_els_xri_abort_event_proc(phba);
  		if (phba->hba_flag & ASYNC_EVENT)
  			lpfc_sli4_async_event_proc(phba);
  		if (phba->hba_flag & HBA_POST_RECEIVE_BUFFER) {
  			spin_lock_irq(&phba->hbalock);
  			phba->hba_flag &= ~HBA_POST_RECEIVE_BUFFER;
  			spin_unlock_irq(&phba->hbalock);
  			lpfc_sli_hbqbuf_add_hbqs(phba, LPFC_ELS_HBQ);
  		}
  		if (phba->fcf.fcf_flag & FCF_REDISC_EVT)
  			lpfc_sli4_fcf_redisc_event_proc(phba);
  	}
  
  	vports = lpfc_create_vport_work_array(phba);
  	if (vports != NULL)
  		for (i = 0; i <= phba->max_vports; i++) {
  			/*
  			 * We could have no vports in array if unloading, so if
  			 * this happens then just use the pport
  			 */
  			if (vports[i] == NULL && i == 0)
  				vport = phba->pport;
  			else
  				vport = vports[i];
  			if (vport == NULL)
  				break;
  			spin_lock_irq(&vport->work_port_lock);
  			work_port_events = vport->work_port_events;
  			vport->work_port_events &= ~work_port_events;
  			spin_unlock_irq(&vport->work_port_lock);
  			if (work_port_events & WORKER_DISC_TMO)
  				lpfc_disc_timeout_handler(vport);
  			if (work_port_events & WORKER_ELS_TMO)
  				lpfc_els_timeout_handler(vport);
  			if (work_port_events & WORKER_HB_TMO)
  				lpfc_hb_timeout_handler(phba);
  			if (work_port_events & WORKER_MBOX_TMO)
  				lpfc_mbox_timeout_handler(phba);
  			if (work_port_events & WORKER_FABRIC_BLOCK_TMO)
  				lpfc_unblock_fabric_iocbs(phba);
  			if (work_port_events & WORKER_RAMP_DOWN_QUEUE)
  				lpfc_ramp_down_queue_handler(phba);
  			if (work_port_events & WORKER_DELAYED_DISC_TMO)
  				lpfc_delayed_disc_timeout_handler(vport);
  		}
  	lpfc_destroy_vport_work_array(phba, vports);
  
  	pring = lpfc_phba_elsring(phba);
  	status = (ha_copy & (HA_RXMASK  << (4*LPFC_ELS_RING)));
  	status >>= (4*LPFC_ELS_RING);
  	if (pring && (status & HA_RXMASK ||
  		      pring->flag & LPFC_DEFERRED_RING_EVENT ||
  		      phba->hba_flag & HBA_SP_QUEUE_EVT)) {
  		if (pring->flag & LPFC_STOP_IOCB_EVENT) {
  			pring->flag |= LPFC_DEFERRED_RING_EVENT;
  			/* Preserve legacy behavior. */
  			if (!(phba->hba_flag & HBA_SP_QUEUE_EVT))
  				set_bit(LPFC_DATA_READY, &phba->data_flags);
  		} else {
  			/* Driver could have abort request completed in queue
  			 * when link goes down.  Allow for this transition.
  			 */
  			if (phba->link_state >= LPFC_LINK_DOWN ||
  			    phba->link_flag & LS_MDS_LOOPBACK) {
  				pring->flag &= ~LPFC_DEFERRED_RING_EVENT;
  				lpfc_sli_handle_slow_ring_event(phba, pring,
  								(status &
  								HA_RXMASK));
  			}
  		}
  		if (phba->sli_rev == LPFC_SLI_REV4)
  			lpfc_drain_txq(phba);
  		/*
  		 * Turn on Ring interrupts
  		 */
  		if (phba->sli_rev <= LPFC_SLI_REV3) {
  			spin_lock_irq(&phba->hbalock);
  			control = readl(phba->HCregaddr);
  			if (!(control & (HC_R0INT_ENA << LPFC_ELS_RING))) {
  				lpfc_debugfs_slow_ring_trc(phba,
  					"WRK Enable ring: cntl:x%x hacopy:x%x",
  					control, ha_copy, 0);
  
  				control |= (HC_R0INT_ENA << LPFC_ELS_RING);
  				writel(control, phba->HCregaddr);
  				readl(phba->HCregaddr); /* flush */
  			} else {
  				lpfc_debugfs_slow_ring_trc(phba,
  					"WRK Ring ok:     cntl:x%x hacopy:x%x",
  					control, ha_copy, 0);
  			}
  			spin_unlock_irq(&phba->hbalock);
  		}
  	}
  	lpfc_work_list_done(phba);
  }
  
  int
  lpfc_do_work(void *p)
  {
  	struct lpfc_hba *phba = p;
  	int rc;
  
  	set_user_nice(current, MIN_NICE);
  	current->flags |= PF_NOFREEZE;
  	phba->data_flags = 0;
  
  	while (!kthread_should_stop()) {
  		/* wait and check worker queue activities */
  		rc = wait_event_interruptible(phba->work_waitq,
  					(test_and_clear_bit(LPFC_DATA_READY,
  							    &phba->data_flags)
  					 || kthread_should_stop()));
  		/* Signal wakeup shall terminate the worker thread */
  		if (rc) {
  			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  					"0433 Wakeup on signal: rc=x%x\n", rc);
  			break;
  		}
  
  		/* Attend pending lpfc data processing */
  		lpfc_work_done(phba);
  	}
  	phba->worker_thread = NULL;
  	lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
  			"0432 Worker thread stopped.\n");
  	return 0;
  }
  
  /*
   * This is only called to handle FC worker events. Since this a rare
   * occurrence, we allocate a struct lpfc_work_evt structure here instead of
   * embedding it in the IOCB.
   */
  int
  lpfc_workq_post_event(struct lpfc_hba *phba, void *arg1, void *arg2,
  		      uint32_t evt)
  {
  	struct lpfc_work_evt  *evtp;
  	unsigned long flags;
  
  	/*
  	 * All Mailbox completions and LPFC_ELS_RING rcv ring IOCB events will
  	 * be queued to worker thread for processing
  	 */
  	evtp = kmalloc(sizeof(struct lpfc_work_evt), GFP_ATOMIC);
  	if (!evtp)
  		return 0;
  
  	evtp->evt_arg1  = arg1;
  	evtp->evt_arg2  = arg2;
  	evtp->evt       = evt;
  
  	spin_lock_irqsave(&phba->hbalock, flags);
  	list_add_tail(&evtp->evt_listp, &phba->work_list);
  	spin_unlock_irqrestore(&phba->hbalock, flags);
  
  	lpfc_worker_wake_up(phba);
  
  	return 1;
  }
  
  void
  lpfc_cleanup_rpis(struct lpfc_vport *vport, int remove)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba  *phba = vport->phba;
  	struct lpfc_nodelist *ndlp, *next_ndlp;
  
  	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
  		if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
  			continue;
  
  		if ((phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) ||
  		    ((vport->port_type == LPFC_NPIV_PORT) &&
  		     ((ndlp->nlp_DID == NameServer_DID) ||
  		      (ndlp->nlp_DID == FDMI_DID))))
  			lpfc_unreg_rpi(vport, ndlp);
  
  		/* Leave Fabric nodes alone on link down */
  		if ((phba->sli_rev < LPFC_SLI_REV4) &&
  		    (!remove && ndlp->nlp_type & NLP_FABRIC))
  			continue;
  
  		/* Notify transport of connectivity loss to trigger cleanup. */
  		if (phba->nvmet_support &&
  		    ndlp->nlp_state == NLP_STE_UNMAPPED_NODE)
  			lpfc_nvmet_invalidate_host(phba, ndlp);
  
  		lpfc_disc_state_machine(vport, ndlp, NULL,
  					remove
  					? NLP_EVT_DEVICE_RM
  					: NLP_EVT_DEVICE_RECOVERY);
  	}
  	if (phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) {
  		if (phba->sli_rev == LPFC_SLI_REV4)
  			lpfc_sli4_unreg_all_rpis(vport);
  		lpfc_mbx_unreg_vpi(vport);
  		spin_lock_irq(shost->host_lock);
  		vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
  		spin_unlock_irq(shost->host_lock);
  	}
  }
  
  void
  lpfc_port_link_failure(struct lpfc_vport *vport)
  {
  	lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
  
  	/* Cleanup any outstanding received buffers */
  	lpfc_cleanup_rcv_buffers(vport);
  
  	/* Cleanup any outstanding RSCN activity */
  	lpfc_els_flush_rscn(vport);
  
  	/* Cleanup any outstanding ELS commands */
  	lpfc_els_flush_cmd(vport);
  
  	lpfc_cleanup_rpis(vport, 0);
  
  	/* Turn off discovery timer if its running */
  	lpfc_can_disctmo(vport);
  }
  
  void
  lpfc_linkdown_port(struct lpfc_vport *vport)
  {
  	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
  
  	if (vport->cfg_enable_fc4_type != LPFC_ENABLE_NVME)
  		fc_host_post_event(shost, fc_get_event_number(),
  				   FCH_EVT_LINKDOWN, 0);
  
  	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
  		"Link Down:       state:x%x rtry:x%x flg:x%x",
  		vport->port_state, vport->fc_ns_retry, vport->fc_flag);
  
  	lpfc_port_link_failure(vport);
  
  	/* Stop delayed Nport discovery */
  	spin_lock_irq(shost->host_lock);
  	vport->fc_flag &= ~FC_DISC_DELAYED;
  	spin_unlock_irq(shost->host_lock);
  	del_timer_sync(&vport->delayed_disc_tmo);
  }
  
  int
  lpfc_linkdown(struct lpfc_hba *phba)
  {
  	struct lpfc_vport *vport = phba->pport;
  	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_vport **vports;
  	LPFC_MBOXQ_t          *mb;
  	int i;
  
  	if (phba->link_state == LPFC_LINK_DOWN)
  		return 0;
  
  	/* Block all SCSI stack I/Os */
  	lpfc_scsi_dev_block(phba);
  
  	phba->defer_flogi_acc_flag = false;
  
  	spin_lock_irq(&phba->hbalock);
  	phba->fcf.fcf_flag &= ~(FCF_AVAILABLE | FCF_SCAN_DONE);
  	spin_unlock_irq(&phba->hbalock);
  	if (phba->link_state > LPFC_LINK_DOWN) {
  		phba->link_state = LPFC_LINK_DOWN;
  		if (phba->sli4_hba.conf_trunk) {
  			phba->trunk_link.link0.state = 0;
  			phba->trunk_link.link1.state = 0;
  			phba->trunk_link.link2.state = 0;
  			phba->trunk_link.link3.state = 0;
  			phba->sli4_hba.link_state.logical_speed =
  						LPFC_LINK_SPEED_UNKNOWN;
  		}
  		spin_lock_irq(shost->host_lock);
  		phba->pport->fc_flag &= ~FC_LBIT;
  		spin_unlock_irq(shost->host_lock);
  	}
  	vports = lpfc_create_vport_work_array(phba);
  	if (vports != NULL) {
  		for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
  			/* Issue a LINK DOWN event to all nodes */
  			lpfc_linkdown_port(vports[i]);
  
  			vports[i]->fc_myDID = 0;
  
  			if ((vport->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
  			    (vport->cfg_enable_fc4_type == LPFC_ENABLE_NVME)) {
  				if (phba->nvmet_support)
  					lpfc_nvmet_update_targetport(phba);
  				else
  					lpfc_nvme_update_localport(vports[i]);
  			}
  		}
  	}
  	lpfc_destroy_vport_work_array(phba, vports);
  
  	/* Clean up any SLI3 firmware default rpi's */
  	if (phba->sli_rev > LPFC_SLI_REV3)
  		goto skip_unreg_did;
  
  	mb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  	if (mb) {
  		lpfc_unreg_did(phba, 0xffff, LPFC_UNREG_ALL_DFLT_RPIS, mb);
  		mb->vport = vport;
  		mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
  		if (lpfc_sli_issue_mbox(phba, mb, MBX_NOWAIT)
  		    == MBX_NOT_FINISHED) {
  			mempool_free(mb, phba->mbox_mem_pool);
  		}
  	}
  
   skip_unreg_did:
  	/* Setup myDID for link up if we are in pt2pt mode */
  	if (phba->pport->fc_flag & FC_PT2PT) {
  		mb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  		if (mb) {
  			lpfc_config_link(phba, mb);
  			mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
  			mb->vport = vport;
  			if (lpfc_sli_issue_mbox(phba, mb, MBX_NOWAIT)
  			    == MBX_NOT_FINISHED) {
  				mempool_free(mb, phba->mbox_mem_pool);
  			}
  		}
  		spin_lock_irq(shost->host_lock);
  		phba->pport->fc_flag &= ~(FC_PT2PT | FC_PT2PT_PLOGI);
  		phba->pport->rcv_flogi_cnt = 0;
  		spin_unlock_irq(shost->host_lock);
  	}
  	return 0;
  }
  
  static void
  lpfc_linkup_cleanup_nodes(struct lpfc_vport *vport)
  {
  	struct lpfc_nodelist *ndlp;
  
  	list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
  		ndlp->nlp_fc4_type &= ~(NLP_FC4_FCP | NLP_FC4_NVME);
  
  		if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
  			continue;
  		if (ndlp->nlp_type & NLP_FABRIC) {
  			/* On Linkup its safe to clean up the ndlp
  			 * from Fabric connections.
  			 */
  			if (ndlp->nlp_DID != Fabric_DID)
  				lpfc_unreg_rpi(vport, ndlp);
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  		} else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) {
  			/* Fail outstanding IO now since device is
  			 * marked for PLOGI.
  			 */
  			lpfc_unreg_rpi(vport, ndlp);
  		}
  	}
  }
  
  static void
  lpfc_linkup_port(struct lpfc_vport *vport)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba  *phba = vport->phba;
  
  	if ((vport->load_flag & FC_UNLOADING) != 0)
  		return;
  
  	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
  		"Link Up:         top:x%x speed:x%x flg:x%x",
  		phba->fc_topology, phba->fc_linkspeed, phba->link_flag);
  
  	/* If NPIV is not enabled, only bring the physical port up */
  	if (!(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
  		(vport != phba->pport))
  		return;
  
  	if (vport->cfg_enable_fc4_type != LPFC_ENABLE_NVME)
  		fc_host_post_event(shost, fc_get_event_number(),
  				   FCH_EVT_LINKUP, 0);
  
  	spin_lock_irq(shost->host_lock);
  	vport->fc_flag &= ~(FC_PT2PT | FC_PT2PT_PLOGI | FC_ABORT_DISCOVERY |
  			    FC_RSCN_MODE | FC_NLP_MORE | FC_RSCN_DISCOVERY);
  	vport->fc_flag |= FC_NDISC_ACTIVE;
  	vport->fc_ns_retry = 0;
  	spin_unlock_irq(shost->host_lock);
  
  	lpfc_linkup_cleanup_nodes(vport);
  }
  
  static int
  lpfc_linkup(struct lpfc_hba *phba)
  {
  	struct lpfc_vport **vports;
  	int i;
  	struct Scsi_Host  *shost = lpfc_shost_from_vport(phba->pport);
  
  	phba->link_state = LPFC_LINK_UP;
  
  	/* Unblock fabric iocbs if they are blocked */
  	clear_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
  	del_timer_sync(&phba->fabric_block_timer);
  
  	vports = lpfc_create_vport_work_array(phba);
  	if (vports != NULL)
  		for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++)
  			lpfc_linkup_port(vports[i]);
  	lpfc_destroy_vport_work_array(phba, vports);
  
  	/* Clear the pport flogi counter in case the link down was
  	 * absorbed without an ACQE. No lock here - in worker thread
  	 * and discovery is synchronized.
  	 */
  	spin_lock_irq(shost->host_lock);
  	phba->pport->rcv_flogi_cnt = 0;
  	spin_unlock_irq(shost->host_lock);
  
  	/* reinitialize initial FLOGI flag */
  	phba->hba_flag &= ~(HBA_FLOGI_ISSUED);
  	phba->defer_flogi_acc_flag = false;
  
  	return 0;
  }
  
  /*
   * This routine handles processing a CLEAR_LA mailbox
   * command upon completion. It is setup in the LPFC_MBOXQ
   * as the completion routine when the command is
   * handed off to the SLI layer. SLI3 only.
   */
  static void
  lpfc_mbx_cmpl_clear_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
  {
  	struct lpfc_vport *vport = pmb->vport;
  	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_sli   *psli = &phba->sli;
  	MAILBOX_t *mb = &pmb->u.mb;
  	uint32_t control;
  
  	/* Since we don't do discovery right now, turn these off here */
  	psli->sli3_ring[LPFC_EXTRA_RING].flag &= ~LPFC_STOP_IOCB_EVENT;
  	psli->sli3_ring[LPFC_FCP_RING].flag &= ~LPFC_STOP_IOCB_EVENT;
  
  	/* Check for error */
  	if ((mb->mbxStatus) && (mb->mbxStatus != 0x1601)) {
  		/* CLEAR_LA mbox error <mbxStatus> state <hba_state> */
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "0320 CLEAR_LA mbxStatus error x%x hba "
  				 "state x%x\n",
  				 mb->mbxStatus, vport->port_state);
  		phba->link_state = LPFC_HBA_ERROR;
  		goto out;
  	}
  
  	if (vport->port_type == LPFC_PHYSICAL_PORT)
  		phba->link_state = LPFC_HBA_READY;
  
  	spin_lock_irq(&phba->hbalock);
  	psli->sli_flag |= LPFC_PROCESS_LA;
  	control = readl(phba->HCregaddr);
  	control |= HC_LAINT_ENA;
  	writel(control, phba->HCregaddr);
  	readl(phba->HCregaddr); /* flush */
  	spin_unlock_irq(&phba->hbalock);
  	mempool_free(pmb, phba->mbox_mem_pool);
  	return;
  
  out:
  	/* Device Discovery completes */
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  			 "0225 Device Discovery completes\n");
  	mempool_free(pmb, phba->mbox_mem_pool);
  
  	spin_lock_irq(shost->host_lock);
  	vport->fc_flag &= ~FC_ABORT_DISCOVERY;
  	spin_unlock_irq(shost->host_lock);
  
  	lpfc_can_disctmo(vport);
  
  	/* turn on Link Attention interrupts */
  
  	spin_lock_irq(&phba->hbalock);
  	psli->sli_flag |= LPFC_PROCESS_LA;
  	control = readl(phba->HCregaddr);
  	control |= HC_LAINT_ENA;
  	writel(control, phba->HCregaddr);
  	readl(phba->HCregaddr); /* flush */
  	spin_unlock_irq(&phba->hbalock);
  
  	return;
  }
  
  void
  lpfc_mbx_cmpl_local_config_link(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
  {
  	struct lpfc_vport *vport = pmb->vport;
  	LPFC_MBOXQ_t *sparam_mb;
  	struct lpfc_dmabuf *sparam_mp;
  	u16 status = pmb->u.mb.mbxStatus;
  	int rc;
  
  	mempool_free(pmb, phba->mbox_mem_pool);
  
  	if (status)
  		goto out;
  
  	/* don't perform discovery for SLI4 loopback diagnostic test */
  	if ((phba->sli_rev == LPFC_SLI_REV4) &&
  	    !(phba->hba_flag & HBA_FCOE_MODE) &&
  	    (phba->link_flag & LS_LOOPBACK_MODE))
  		return;
  
  	if (phba->fc_topology == LPFC_TOPOLOGY_LOOP &&
  	    vport->fc_flag & FC_PUBLIC_LOOP &&
  	    !(vport->fc_flag & FC_LBIT)) {
  			/* Need to wait for FAN - use discovery timer
  			 * for timeout.  port_state is identically
  			 * LPFC_LOCAL_CFG_LINK while waiting for FAN
  			 */
  			lpfc_set_disctmo(vport);
  			return;
  	}
  
  	/* Start discovery by sending a FLOGI. port_state is identically
  	 * LPFC_FLOGI while waiting for FLOGI cmpl.
  	 */
  	if (vport->port_state != LPFC_FLOGI) {
  		/* Issue MBX_READ_SPARAM to update CSPs before FLOGI if
  		 * bb-credit recovery is in place.
  		 */
  		if (phba->bbcredit_support && phba->cfg_enable_bbcr &&
  		    !(phba->link_flag & LS_LOOPBACK_MODE)) {
  			sparam_mb = mempool_alloc(phba->mbox_mem_pool,
  						  GFP_KERNEL);
  			if (!sparam_mb)
  				goto sparam_out;
  
  			rc = lpfc_read_sparam(phba, sparam_mb, 0);
  			if (rc) {
  				mempool_free(sparam_mb, phba->mbox_mem_pool);
  				goto sparam_out;
  			}
  			sparam_mb->vport = vport;
  			sparam_mb->mbox_cmpl = lpfc_mbx_cmpl_read_sparam;
  			rc = lpfc_sli_issue_mbox(phba, sparam_mb, MBX_NOWAIT);
  			if (rc == MBX_NOT_FINISHED) {
  				sparam_mp = (struct lpfc_dmabuf *)
  						sparam_mb->ctx_buf;
  				lpfc_mbuf_free(phba, sparam_mp->virt,
  					       sparam_mp->phys);
  				kfree(sparam_mp);
  				sparam_mb->ctx_buf = NULL;
  				mempool_free(sparam_mb, phba->mbox_mem_pool);
  				goto sparam_out;
  			}
  
  			phba->hba_flag |= HBA_DEFER_FLOGI;
  		}  else {
  			lpfc_initial_flogi(vport);
  		}
  	} else {
  		if (vport->fc_flag & FC_PT2PT)
  			lpfc_disc_start(vport);
  	}
  	return;
  
  out:
  	lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  			 "0306 CONFIG_LINK mbxStatus error x%x HBA state x%x\n",
  			 status, vport->port_state);
  
  sparam_out:
  	lpfc_linkdown(phba);
  
  	lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  			 "0200 CONFIG_LINK bad hba state x%x\n",
  			 vport->port_state);
  
  	lpfc_issue_clear_la(phba, vport);
  	return;
  }
  
  /**
   * lpfc_sli4_clear_fcf_rr_bmask
   * @phba: pointer to the struct lpfc_hba for this port.
   * This fucnction resets the round robin bit mask and clears the
   * fcf priority list. The list deletions are done while holding the
   * hbalock. The ON_LIST flag and the FLOGI_FAILED flags are cleared
   * from the lpfc_fcf_pri record.
   **/
  void
  lpfc_sli4_clear_fcf_rr_bmask(struct lpfc_hba *phba)
  {
  	struct lpfc_fcf_pri *fcf_pri;
  	struct lpfc_fcf_pri *next_fcf_pri;
  	memset(phba->fcf.fcf_rr_bmask, 0, sizeof(*phba->fcf.fcf_rr_bmask));
  	spin_lock_irq(&phba->hbalock);
  	list_for_each_entry_safe(fcf_pri, next_fcf_pri,
  				&phba->fcf.fcf_pri_list, list) {
  		list_del_init(&fcf_pri->list);
  		fcf_pri->fcf_rec.flag = 0;
  	}
  	spin_unlock_irq(&phba->hbalock);
  }
  static void
  lpfc_mbx_cmpl_reg_fcfi(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
  {
  	struct lpfc_vport *vport = mboxq->vport;
  
  	if (mboxq->u.mb.mbxStatus) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "2017 REG_FCFI mbxStatus error x%x "
  				 "HBA state x%x\n", mboxq->u.mb.mbxStatus,
  				 vport->port_state);
  		goto fail_out;
  	}
  
  	/* Start FCoE discovery by sending a FLOGI. */
  	phba->fcf.fcfi = bf_get(lpfc_reg_fcfi_fcfi, &mboxq->u.mqe.un.reg_fcfi);
  	/* Set the FCFI registered flag */
  	spin_lock_irq(&phba->hbalock);
  	phba->fcf.fcf_flag |= FCF_REGISTERED;
  	spin_unlock_irq(&phba->hbalock);
  
  	/* If there is a pending FCoE event, restart FCF table scan. */
  	if ((!(phba->hba_flag & FCF_RR_INPROG)) &&
  		lpfc_check_pending_fcoe_event(phba, LPFC_UNREG_FCF))
  		goto fail_out;
  
  	/* Mark successful completion of FCF table scan */
  	spin_lock_irq(&phba->hbalock);
  	phba->fcf.fcf_flag |= (FCF_SCAN_DONE | FCF_IN_USE);
  	phba->hba_flag &= ~FCF_TS_INPROG;
  	if (vport->port_state != LPFC_FLOGI) {
  		phba->hba_flag |= FCF_RR_INPROG;
  		spin_unlock_irq(&phba->hbalock);
  		lpfc_issue_init_vfi(vport);
  		goto out;
  	}
  	spin_unlock_irq(&phba->hbalock);
  	goto out;
  
  fail_out:
  	spin_lock_irq(&phba->hbalock);
  	phba->hba_flag &= ~FCF_RR_INPROG;
  	spin_unlock_irq(&phba->hbalock);
  out:
  	mempool_free(mboxq, phba->mbox_mem_pool);
  }
  
  /**
   * lpfc_fab_name_match - Check if the fcf fabric name match.
   * @fab_name: pointer to fabric name.
   * @new_fcf_record: pointer to fcf record.
   *
   * This routine compare the fcf record's fabric name with provided
   * fabric name. If the fabric name are identical this function
   * returns 1 else return 0.
   **/
  static uint32_t
  lpfc_fab_name_match(uint8_t *fab_name, struct fcf_record *new_fcf_record)
  {
  	if (fab_name[0] != bf_get(lpfc_fcf_record_fab_name_0, new_fcf_record))
  		return 0;
  	if (fab_name[1] != bf_get(lpfc_fcf_record_fab_name_1, new_fcf_record))
  		return 0;
  	if (fab_name[2] != bf_get(lpfc_fcf_record_fab_name_2, new_fcf_record))
  		return 0;
  	if (fab_name[3] != bf_get(lpfc_fcf_record_fab_name_3, new_fcf_record))
  		return 0;
  	if (fab_name[4] != bf_get(lpfc_fcf_record_fab_name_4, new_fcf_record))
  		return 0;
  	if (fab_name[5] != bf_get(lpfc_fcf_record_fab_name_5, new_fcf_record))
  		return 0;
  	if (fab_name[6] != bf_get(lpfc_fcf_record_fab_name_6, new_fcf_record))
  		return 0;
  	if (fab_name[7] != bf_get(lpfc_fcf_record_fab_name_7, new_fcf_record))
  		return 0;
  	return 1;
  }
  
  /**
   * lpfc_sw_name_match - Check if the fcf switch name match.
   * @sw_name: pointer to switch name.
   * @new_fcf_record: pointer to fcf record.
   *
   * This routine compare the fcf record's switch name with provided
   * switch name. If the switch name are identical this function
   * returns 1 else return 0.
   **/
  static uint32_t
  lpfc_sw_name_match(uint8_t *sw_name, struct fcf_record *new_fcf_record)
  {
  	if (sw_name[0] != bf_get(lpfc_fcf_record_switch_name_0, new_fcf_record))
  		return 0;
  	if (sw_name[1] != bf_get(lpfc_fcf_record_switch_name_1, new_fcf_record))
  		return 0;
  	if (sw_name[2] != bf_get(lpfc_fcf_record_switch_name_2, new_fcf_record))
  		return 0;
  	if (sw_name[3] != bf_get(lpfc_fcf_record_switch_name_3, new_fcf_record))
  		return 0;
  	if (sw_name[4] != bf_get(lpfc_fcf_record_switch_name_4, new_fcf_record))
  		return 0;
  	if (sw_name[5] != bf_get(lpfc_fcf_record_switch_name_5, new_fcf_record))
  		return 0;
  	if (sw_name[6] != bf_get(lpfc_fcf_record_switch_name_6, new_fcf_record))
  		return 0;
  	if (sw_name[7] != bf_get(lpfc_fcf_record_switch_name_7, new_fcf_record))
  		return 0;
  	return 1;
  }
  
  /**
   * lpfc_mac_addr_match - Check if the fcf mac address match.
   * @mac_addr: pointer to mac address.
   * @new_fcf_record: pointer to fcf record.
   *
   * This routine compare the fcf record's mac address with HBA's
   * FCF mac address. If the mac addresses are identical this function
   * returns 1 else return 0.
   **/
  static uint32_t
  lpfc_mac_addr_match(uint8_t *mac_addr, struct fcf_record *new_fcf_record)
  {
  	if (mac_addr[0] != bf_get(lpfc_fcf_record_mac_0, new_fcf_record))
  		return 0;
  	if (mac_addr[1] != bf_get(lpfc_fcf_record_mac_1, new_fcf_record))
  		return 0;
  	if (mac_addr[2] != bf_get(lpfc_fcf_record_mac_2, new_fcf_record))
  		return 0;
  	if (mac_addr[3] != bf_get(lpfc_fcf_record_mac_3, new_fcf_record))
  		return 0;
  	if (mac_addr[4] != bf_get(lpfc_fcf_record_mac_4, new_fcf_record))
  		return 0;
  	if (mac_addr[5] != bf_get(lpfc_fcf_record_mac_5, new_fcf_record))
  		return 0;
  	return 1;
  }
  
  static bool
  lpfc_vlan_id_match(uint16_t curr_vlan_id, uint16_t new_vlan_id)
  {
  	return (curr_vlan_id == new_vlan_id);
  }
  
  /**
   * __lpfc_update_fcf_record_pri - update the lpfc_fcf_pri record.
   * @phba: pointer to lpfc hba data structure.
   * @fcf_index: Index for the lpfc_fcf_record.
   * @new_fcf_record: pointer to hba fcf record.
   *
   * This routine updates the driver FCF priority record from the new HBA FCF
   * record. The hbalock is asserted held in the code path calling this
   * routine.
   **/
  static void
  __lpfc_update_fcf_record_pri(struct lpfc_hba *phba, uint16_t fcf_index,
  				 struct fcf_record *new_fcf_record
  				 )
  {
  	struct lpfc_fcf_pri *fcf_pri;
  
  	fcf_pri = &phba->fcf.fcf_pri[fcf_index];
  	fcf_pri->fcf_rec.fcf_index = fcf_index;
  	/* FCF record priority */
  	fcf_pri->fcf_rec.priority = new_fcf_record->fip_priority;
  
  }
  
  /**
   * lpfc_copy_fcf_record - Copy fcf information to lpfc_hba.
   * @fcf_rec: pointer to driver fcf record.
   * @new_fcf_record: pointer to fcf record.
   *
   * This routine copies the FCF information from the FCF
   * record to lpfc_hba data structure.
   **/
  static void
  lpfc_copy_fcf_record(struct lpfc_fcf_rec *fcf_rec,
  		     struct fcf_record *new_fcf_record)
  {
  	/* Fabric name */
  	fcf_rec->fabric_name[0] =
  		bf_get(lpfc_fcf_record_fab_name_0, new_fcf_record);
  	fcf_rec->fabric_name[1] =
  		bf_get(lpfc_fcf_record_fab_name_1, new_fcf_record);
  	fcf_rec->fabric_name[2] =
  		bf_get(lpfc_fcf_record_fab_name_2, new_fcf_record);
  	fcf_rec->fabric_name[3] =
  		bf_get(lpfc_fcf_record_fab_name_3, new_fcf_record);
  	fcf_rec->fabric_name[4] =
  		bf_get(lpfc_fcf_record_fab_name_4, new_fcf_record);
  	fcf_rec->fabric_name[5] =
  		bf_get(lpfc_fcf_record_fab_name_5, new_fcf_record);
  	fcf_rec->fabric_name[6] =
  		bf_get(lpfc_fcf_record_fab_name_6, new_fcf_record);
  	fcf_rec->fabric_name[7] =
  		bf_get(lpfc_fcf_record_fab_name_7, new_fcf_record);
  	/* Mac address */
  	fcf_rec->mac_addr[0] = bf_get(lpfc_fcf_record_mac_0, new_fcf_record);
  	fcf_rec->mac_addr[1] = bf_get(lpfc_fcf_record_mac_1, new_fcf_record);
  	fcf_rec->mac_addr[2] = bf_get(lpfc_fcf_record_mac_2, new_fcf_record);
  	fcf_rec->mac_addr[3] = bf_get(lpfc_fcf_record_mac_3, new_fcf_record);
  	fcf_rec->mac_addr[4] = bf_get(lpfc_fcf_record_mac_4, new_fcf_record);
  	fcf_rec->mac_addr[5] = bf_get(lpfc_fcf_record_mac_5, new_fcf_record);
  	/* FCF record index */
  	fcf_rec->fcf_indx = bf_get(lpfc_fcf_record_fcf_index, new_fcf_record);
  	/* FCF record priority */
  	fcf_rec->priority = new_fcf_record->fip_priority;
  	/* Switch name */
  	fcf_rec->switch_name[0] =
  		bf_get(lpfc_fcf_record_switch_name_0, new_fcf_record);
  	fcf_rec->switch_name[1] =
  		bf_get(lpfc_fcf_record_switch_name_1, new_fcf_record);
  	fcf_rec->switch_name[2] =
  		bf_get(lpfc_fcf_record_switch_name_2, new_fcf_record);
  	fcf_rec->switch_name[3] =
  		bf_get(lpfc_fcf_record_switch_name_3, new_fcf_record);
  	fcf_rec->switch_name[4] =
  		bf_get(lpfc_fcf_record_switch_name_4, new_fcf_record);
  	fcf_rec->switch_name[5] =
  		bf_get(lpfc_fcf_record_switch_name_5, new_fcf_record);
  	fcf_rec->switch_name[6] =
  		bf_get(lpfc_fcf_record_switch_name_6, new_fcf_record);
  	fcf_rec->switch_name[7] =
  		bf_get(lpfc_fcf_record_switch_name_7, new_fcf_record);
  }
  
  /**
   * lpfc_update_fcf_record - Update driver fcf record
   * @phba: pointer to lpfc hba data structure.
   * @fcf_rec: pointer to driver fcf record.
   * @new_fcf_record: pointer to hba fcf record.
   * @addr_mode: address mode to be set to the driver fcf record.
   * @vlan_id: vlan tag to be set to the driver fcf record.
   * @flag: flag bits to be set to the driver fcf record.
   *
   * This routine updates the driver FCF record from the new HBA FCF record
   * together with the address mode, vlan_id, and other informations. This
   * routine is called with the hbalock held.
   **/
  static void
  __lpfc_update_fcf_record(struct lpfc_hba *phba, struct lpfc_fcf_rec *fcf_rec,
  		       struct fcf_record *new_fcf_record, uint32_t addr_mode,
  		       uint16_t vlan_id, uint32_t flag)
  {
  	lockdep_assert_held(&phba->hbalock);
  
  	/* Copy the fields from the HBA's FCF record */
  	lpfc_copy_fcf_record(fcf_rec, new_fcf_record);
  	/* Update other fields of driver FCF record */
  	fcf_rec->addr_mode = addr_mode;
  	fcf_rec->vlan_id = vlan_id;
  	fcf_rec->flag |= (flag | RECORD_VALID);
  	__lpfc_update_fcf_record_pri(phba,
  		bf_get(lpfc_fcf_record_fcf_index, new_fcf_record),
  				 new_fcf_record);
  }
  
  /**
   * lpfc_register_fcf - Register the FCF with hba.
   * @phba: pointer to lpfc hba data structure.
   *
   * This routine issues a register fcfi mailbox command to register
   * the fcf with HBA.
   **/
  static void
  lpfc_register_fcf(struct lpfc_hba *phba)
  {
  	LPFC_MBOXQ_t *fcf_mbxq;
  	int rc;
  
  	spin_lock_irq(&phba->hbalock);
  	/* If the FCF is not available do nothing. */
  	if (!(phba->fcf.fcf_flag & FCF_AVAILABLE)) {
  		phba->hba_flag &= ~(FCF_TS_INPROG | FCF_RR_INPROG);
  		spin_unlock_irq(&phba->hbalock);
  		return;
  	}
  
  	/* The FCF is already registered, start discovery */
  	if (phba->fcf.fcf_flag & FCF_REGISTERED) {
  		phba->fcf.fcf_flag |= (FCF_SCAN_DONE | FCF_IN_USE);
  		phba->hba_flag &= ~FCF_TS_INPROG;
  		if (phba->pport->port_state != LPFC_FLOGI &&
  		    phba->pport->fc_flag & FC_FABRIC) {
  			phba->hba_flag |= FCF_RR_INPROG;
  			spin_unlock_irq(&phba->hbalock);
  			lpfc_initial_flogi(phba->pport);
  			return;
  		}
  		spin_unlock_irq(&phba->hbalock);
  		return;
  	}
  	spin_unlock_irq(&phba->hbalock);
  
  	fcf_mbxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  	if (!fcf_mbxq) {
  		spin_lock_irq(&phba->hbalock);
  		phba->hba_flag &= ~(FCF_TS_INPROG | FCF_RR_INPROG);
  		spin_unlock_irq(&phba->hbalock);
  		return;
  	}
  
  	lpfc_reg_fcfi(phba, fcf_mbxq);
  	fcf_mbxq->vport = phba->pport;
  	fcf_mbxq->mbox_cmpl = lpfc_mbx_cmpl_reg_fcfi;
  	rc = lpfc_sli_issue_mbox(phba, fcf_mbxq, MBX_NOWAIT);
  	if (rc == MBX_NOT_FINISHED) {
  		spin_lock_irq(&phba->hbalock);
  		phba->hba_flag &= ~(FCF_TS_INPROG | FCF_RR_INPROG);
  		spin_unlock_irq(&phba->hbalock);
  		mempool_free(fcf_mbxq, phba->mbox_mem_pool);
  	}
  
  	return;
  }
  
  /**
   * lpfc_match_fcf_conn_list - Check if the FCF record can be used for discovery.
   * @phba: pointer to lpfc hba data structure.
   * @new_fcf_record: pointer to fcf record.
   * @boot_flag: Indicates if this record used by boot bios.
   * @addr_mode: The address mode to be used by this FCF
   * @vlan_id: The vlan id to be used as vlan tagging by this FCF.
   *
   * This routine compare the fcf record with connect list obtained from the
   * config region to decide if this FCF can be used for SAN discovery. It returns
   * 1 if this record can be used for SAN discovery else return zero. If this FCF
   * record can be used for SAN discovery, the boot_flag will indicate if this FCF
   * is used by boot bios and addr_mode will indicate the addressing mode to be
   * used for this FCF when the function returns.
   * If the FCF record need to be used with a particular vlan id, the vlan is
   * set in the vlan_id on return of the function. If not VLAN tagging need to
   * be used with the FCF vlan_id will be set to LPFC_FCOE_NULL_VID;
   **/
  static int
  lpfc_match_fcf_conn_list(struct lpfc_hba *phba,
  			struct fcf_record *new_fcf_record,
  			uint32_t *boot_flag, uint32_t *addr_mode,
  			uint16_t *vlan_id)
  {
  	struct lpfc_fcf_conn_entry *conn_entry;
  	int i, j, fcf_vlan_id = 0;
  
  	/* Find the lowest VLAN id in the FCF record */
  	for (i = 0; i < 512; i++) {
  		if (new_fcf_record->vlan_bitmap[i]) {
  			fcf_vlan_id = i * 8;
  			j = 0;
  			while (!((new_fcf_record->vlan_bitmap[i] >> j) & 1)) {
  				j++;
  				fcf_vlan_id++;
  			}
  			break;
  		}
  	}
  
  	/* FCF not valid/available or solicitation in progress */
  	if (!bf_get(lpfc_fcf_record_fcf_avail, new_fcf_record) ||
  	    !bf_get(lpfc_fcf_record_fcf_valid, new_fcf_record) ||
  	    bf_get(lpfc_fcf_record_fcf_sol, new_fcf_record))
  		return 0;
  
  	if (!(phba->hba_flag & HBA_FIP_SUPPORT)) {
  		*boot_flag = 0;
  		*addr_mode = bf_get(lpfc_fcf_record_mac_addr_prov,
  				new_fcf_record);
  		if (phba->valid_vlan)
  			*vlan_id = phba->vlan_id;
  		else
  			*vlan_id = LPFC_FCOE_NULL_VID;
  		return 1;
  	}
  
  	/*
  	 * If there are no FCF connection table entry, driver connect to all
  	 * FCFs.
  	 */
  	if (list_empty(&phba->fcf_conn_rec_list)) {
  		*boot_flag = 0;
  		*addr_mode = bf_get(lpfc_fcf_record_mac_addr_prov,
  			new_fcf_record);
  
  		/*
  		 * When there are no FCF connect entries, use driver's default
  		 * addressing mode - FPMA.
  		 */
  		if (*addr_mode & LPFC_FCF_FPMA)
  			*addr_mode = LPFC_FCF_FPMA;
  
  		/* If FCF record report a vlan id use that vlan id */
  		if (fcf_vlan_id)
  			*vlan_id = fcf_vlan_id;
  		else
  			*vlan_id = LPFC_FCOE_NULL_VID;
  		return 1;
  	}
  
  	list_for_each_entry(conn_entry,
  			    &phba->fcf_conn_rec_list, list) {
  		if (!(conn_entry->conn_rec.flags & FCFCNCT_VALID))
  			continue;
  
  		if ((conn_entry->conn_rec.flags & FCFCNCT_FBNM_VALID) &&
  			!lpfc_fab_name_match(conn_entry->conn_rec.fabric_name,
  					     new_fcf_record))
  			continue;
  		if ((conn_entry->conn_rec.flags & FCFCNCT_SWNM_VALID) &&
  			!lpfc_sw_name_match(conn_entry->conn_rec.switch_name,
  					    new_fcf_record))
  			continue;
  		if (conn_entry->conn_rec.flags & FCFCNCT_VLAN_VALID) {
  			/*
  			 * If the vlan bit map does not have the bit set for the
  			 * vlan id to be used, then it is not a match.
  			 */
  			if (!(new_fcf_record->vlan_bitmap
  				[conn_entry->conn_rec.vlan_tag / 8] &
  				(1 << (conn_entry->conn_rec.vlan_tag % 8))))
  				continue;
  		}
  
  		/*
  		 * If connection record does not support any addressing mode,
  		 * skip the FCF record.
  		 */
  		if (!(bf_get(lpfc_fcf_record_mac_addr_prov, new_fcf_record)
  			& (LPFC_FCF_FPMA | LPFC_FCF_SPMA)))
  			continue;
  
  		/*
  		 * Check if the connection record specifies a required
  		 * addressing mode.
  		 */
  		if ((conn_entry->conn_rec.flags & FCFCNCT_AM_VALID) &&
  			!(conn_entry->conn_rec.flags & FCFCNCT_AM_PREFERRED)) {
  
  			/*
  			 * If SPMA required but FCF not support this continue.
  			 */
  			if ((conn_entry->conn_rec.flags & FCFCNCT_AM_SPMA) &&
  				!(bf_get(lpfc_fcf_record_mac_addr_prov,
  					new_fcf_record) & LPFC_FCF_SPMA))
  				continue;
  
  			/*
  			 * If FPMA required but FCF not support this continue.
  			 */
  			if (!(conn_entry->conn_rec.flags & FCFCNCT_AM_SPMA) &&
  				!(bf_get(lpfc_fcf_record_mac_addr_prov,
  				new_fcf_record) & LPFC_FCF_FPMA))
  				continue;
  		}
  
  		/*
  		 * This fcf record matches filtering criteria.
  		 */
  		if (conn_entry->conn_rec.flags & FCFCNCT_BOOT)
  			*boot_flag = 1;
  		else
  			*boot_flag = 0;
  
  		/*
  		 * If user did not specify any addressing mode, or if the
  		 * preferred addressing mode specified by user is not supported
  		 * by FCF, allow fabric to pick the addressing mode.
  		 */
  		*addr_mode = bf_get(lpfc_fcf_record_mac_addr_prov,
  				new_fcf_record);
  		/*
  		 * If the user specified a required address mode, assign that
  		 * address mode
  		 */
  		if ((conn_entry->conn_rec.flags & FCFCNCT_AM_VALID) &&
  			(!(conn_entry->conn_rec.flags & FCFCNCT_AM_PREFERRED)))
  			*addr_mode = (conn_entry->conn_rec.flags &
  				FCFCNCT_AM_SPMA) ?
  				LPFC_FCF_SPMA : LPFC_FCF_FPMA;
  		/*
  		 * If the user specified a preferred address mode, use the
  		 * addr mode only if FCF support the addr_mode.
  		 */
  		else if ((conn_entry->conn_rec.flags & FCFCNCT_AM_VALID) &&
  			(conn_entry->conn_rec.flags & FCFCNCT_AM_PREFERRED) &&
  			(conn_entry->conn_rec.flags & FCFCNCT_AM_SPMA) &&
  			(*addr_mode & LPFC_FCF_SPMA))
  				*addr_mode = LPFC_FCF_SPMA;
  		else if ((conn_entry->conn_rec.flags & FCFCNCT_AM_VALID) &&
  			(conn_entry->conn_rec.flags & FCFCNCT_AM_PREFERRED) &&
  			!(conn_entry->conn_rec.flags & FCFCNCT_AM_SPMA) &&
  			(*addr_mode & LPFC_FCF_FPMA))
  				*addr_mode = LPFC_FCF_FPMA;
  
  		/* If matching connect list has a vlan id, use it */
  		if (conn_entry->conn_rec.flags & FCFCNCT_VLAN_VALID)
  			*vlan_id = conn_entry->conn_rec.vlan_tag;
  		/*
  		 * If no vlan id is specified in connect list, use the vlan id
  		 * in the FCF record
  		 */
  		else if (fcf_vlan_id)
  			*vlan_id = fcf_vlan_id;
  		else
  			*vlan_id = LPFC_FCOE_NULL_VID;
  
  		return 1;
  	}
  
  	return 0;
  }
  
  /**
   * lpfc_check_pending_fcoe_event - Check if there is pending fcoe event.
   * @phba: pointer to lpfc hba data structure.
   * @unreg_fcf: Unregister FCF if FCF table need to be re-scaned.
   *
   * This function check if there is any fcoe event pending while driver
   * scan FCF entries. If there is any pending event, it will restart the
   * FCF saning and return 1 else return 0.
   */
  int
  lpfc_check_pending_fcoe_event(struct lpfc_hba *phba, uint8_t unreg_fcf)
  {
  	/*
  	 * If the Link is up and no FCoE events while in the
  	 * FCF discovery, no need to restart FCF discovery.
  	 */
  	if ((phba->link_state  >= LPFC_LINK_UP) &&
  	    (phba->fcoe_eventtag == phba->fcoe_eventtag_at_fcf_scan))
  		return 0;
  
  	lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  			"2768 Pending link or FCF event during current "
  			"handling of the previous event: link_state:x%x, "
  			"evt_tag_at_scan:x%x, evt_tag_current:x%x\n",
  			phba->link_state, phba->fcoe_eventtag_at_fcf_scan,
  			phba->fcoe_eventtag);
  
  	spin_lock_irq(&phba->hbalock);
  	phba->fcf.fcf_flag &= ~FCF_AVAILABLE;
  	spin_unlock_irq(&phba->hbalock);
  
  	if (phba->link_state >= LPFC_LINK_UP) {
  		lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
  				"2780 Restart FCF table scan due to "
  				"pending FCF event:evt_tag_at_scan:x%x, "
  				"evt_tag_current:x%x\n",
  				phba->fcoe_eventtag_at_fcf_scan,
  				phba->fcoe_eventtag);
  		lpfc_sli4_fcf_scan_read_fcf_rec(phba, LPFC_FCOE_FCF_GET_FIRST);
  	} else {
  		/*
  		 * Do not continue FCF discovery and clear FCF_TS_INPROG
  		 * flag
  		 */
  		lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
  				"2833 Stop FCF discovery process due to link "
  				"state change (x%x)\n", phba->link_state);
  		spin_lock_irq(&phba->hbalock);
  		phba->hba_flag &= ~(FCF_TS_INPROG | FCF_RR_INPROG);
  		phba->fcf.fcf_flag &= ~(FCF_REDISC_FOV | FCF_DISCOVERY);
  		spin_unlock_irq(&phba->hbalock);
  	}
  
  	/* Unregister the currently registered FCF if required */
  	if (unreg_fcf) {
  		spin_lock_irq(&phba->hbalock);
  		phba->fcf.fcf_flag &= ~FCF_REGISTERED;
  		spin_unlock_irq(&phba->hbalock);
  		lpfc_sli4_unregister_fcf(phba);
  	}
  	return 1;
  }
  
  /**
   * lpfc_sli4_new_fcf_random_select - Randomly select an eligible new fcf record
   * @phba: pointer to lpfc hba data structure.
   * @fcf_cnt: number of eligible fcf record seen so far.
   *
   * This function makes an running random selection decision on FCF record to
   * use through a sequence of @fcf_cnt eligible FCF records with equal
   * probability. To perform integer manunipulation of random numbers with
   * size unit32_t, the lower 16 bits of the 32-bit random number returned
   * from prandom_u32() are taken as the random random number generated.
   *
   * Returns true when outcome is for the newly read FCF record should be
   * chosen; otherwise, return false when outcome is for keeping the previously
   * chosen FCF record.
   **/
  static bool
  lpfc_sli4_new_fcf_random_select(struct lpfc_hba *phba, uint32_t fcf_cnt)
  {
  	uint32_t rand_num;
  
  	/* Get 16-bit uniform random number */
  	rand_num = 0xFFFF & prandom_u32();
  
  	/* Decision with probability 1/fcf_cnt */
  	if ((fcf_cnt * rand_num) < 0xFFFF)
  		return true;
  	else
  		return false;
  }
  
  /**
   * lpfc_sli4_fcf_rec_mbox_parse - Parse read_fcf mbox command.
   * @phba: pointer to lpfc hba data structure.
   * @mboxq: pointer to mailbox object.
   * @next_fcf_index: pointer to holder of next fcf index.
   *
   * This routine parses the non-embedded fcf mailbox command by performing the
   * necessarily error checking, non-embedded read FCF record mailbox command
   * SGE parsing, and endianness swapping.
   *
   * Returns the pointer to the new FCF record in the non-embedded mailbox
   * command DMA memory if successfully, other NULL.
   */
  static struct fcf_record *
  lpfc_sli4_fcf_rec_mbox_parse(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq,
  			     uint16_t *next_fcf_index)
  {
  	void *virt_addr;
  	struct lpfc_mbx_sge sge;
  	struct lpfc_mbx_read_fcf_tbl *read_fcf;
  	uint32_t shdr_status, shdr_add_status, if_type;
  	union lpfc_sli4_cfg_shdr *shdr;
  	struct fcf_record *new_fcf_record;
  
  	/* Get the first SGE entry from the non-embedded DMA memory. This
  	 * routine only uses a single SGE.
  	 */
  	lpfc_sli4_mbx_sge_get(mboxq, 0, &sge);
  	if (unlikely(!mboxq->sge_array)) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"2524 Failed to get the non-embedded SGE "
  				"virtual address\n");
  		return NULL;
  	}
  	virt_addr = mboxq->sge_array->addr[0];
  
  	shdr = (union lpfc_sli4_cfg_shdr *)virt_addr;
  	lpfc_sli_pcimem_bcopy(shdr, shdr,
  			      sizeof(union lpfc_sli4_cfg_shdr));
  	shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
  	if_type = bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf);
  	shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
  	if (shdr_status || shdr_add_status) {
  		if (shdr_status == STATUS_FCF_TABLE_EMPTY ||
  					if_type == LPFC_SLI_INTF_IF_TYPE_2)
  			lpfc_printf_log(phba, KERN_ERR,
  					LOG_TRACE_EVENT,
  					"2726 READ_FCF_RECORD Indicates empty "
  					"FCF table.\n");
  		else
  			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  					"2521 READ_FCF_RECORD mailbox failed "
  					"with status x%x add_status x%x, "
  					"mbx\n", shdr_status, shdr_add_status);
  		return NULL;
  	}
  
  	/* Interpreting the returned information of the FCF record */
  	read_fcf = (struct lpfc_mbx_read_fcf_tbl *)virt_addr;
  	lpfc_sli_pcimem_bcopy(read_fcf, read_fcf,
  			      sizeof(struct lpfc_mbx_read_fcf_tbl));
  	*next_fcf_index = bf_get(lpfc_mbx_read_fcf_tbl_nxt_vindx, read_fcf);
  	new_fcf_record = (struct fcf_record *)(virt_addr +
  			  sizeof(struct lpfc_mbx_read_fcf_tbl));
  	lpfc_sli_pcimem_bcopy(new_fcf_record, new_fcf_record,
  				offsetof(struct fcf_record, vlan_bitmap));
  	new_fcf_record->word137 = le32_to_cpu(new_fcf_record->word137);
  	new_fcf_record->word138 = le32_to_cpu(new_fcf_record->word138);
  
  	return new_fcf_record;
  }
  
  /**
   * lpfc_sli4_log_fcf_record_info - Log the information of a fcf record
   * @phba: pointer to lpfc hba data structure.
   * @fcf_record: pointer to the fcf record.
   * @vlan_id: the lowest vlan identifier associated to this fcf record.
   * @next_fcf_index: the index to the next fcf record in hba's fcf table.
   *
   * This routine logs the detailed FCF record if the LOG_FIP loggin is
   * enabled.
   **/
  static void
  lpfc_sli4_log_fcf_record_info(struct lpfc_hba *phba,
  			      struct fcf_record *fcf_record,
  			      uint16_t vlan_id,
  			      uint16_t next_fcf_index)
  {
  	lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  			"2764 READ_FCF_RECORD:\n"
  			"\tFCF_Index     : x%x\n"
  			"\tFCF_Avail     : x%x\n"
  			"\tFCF_Valid     : x%x\n"
  			"\tFCF_SOL       : x%x\n"
  			"\tFIP_Priority  : x%x\n"
  			"\tMAC_Provider  : x%x\n"
  			"\tLowest VLANID : x%x\n"
  			"\tFCF_MAC Addr  : x%x:%x:%x:%x:%x:%x\n"
  			"\tFabric_Name   : x%x:%x:%x:%x:%x:%x:%x:%x\n"
  			"\tSwitch_Name   : x%x:%x:%x:%x:%x:%x:%x:%x\n"
  			"\tNext_FCF_Index: x%x\n",
  			bf_get(lpfc_fcf_record_fcf_index, fcf_record),
  			bf_get(lpfc_fcf_record_fcf_avail, fcf_record),
  			bf_get(lpfc_fcf_record_fcf_valid, fcf_record),
  			bf_get(lpfc_fcf_record_fcf_sol, fcf_record),
  			fcf_record->fip_priority,
  			bf_get(lpfc_fcf_record_mac_addr_prov, fcf_record),
  			vlan_id,
  			bf_get(lpfc_fcf_record_mac_0, fcf_record),
  			bf_get(lpfc_fcf_record_mac_1, fcf_record),
  			bf_get(lpfc_fcf_record_mac_2, fcf_record),
  			bf_get(lpfc_fcf_record_mac_3, fcf_record),
  			bf_get(lpfc_fcf_record_mac_4, fcf_record),
  			bf_get(lpfc_fcf_record_mac_5, fcf_record),
  			bf_get(lpfc_fcf_record_fab_name_0, fcf_record),
  			bf_get(lpfc_fcf_record_fab_name_1, fcf_record),
  			bf_get(lpfc_fcf_record_fab_name_2, fcf_record),
  			bf_get(lpfc_fcf_record_fab_name_3, fcf_record),
  			bf_get(lpfc_fcf_record_fab_name_4, fcf_record),
  			bf_get(lpfc_fcf_record_fab_name_5, fcf_record),
  			bf_get(lpfc_fcf_record_fab_name_6, fcf_record),
  			bf_get(lpfc_fcf_record_fab_name_7, fcf_record),
  			bf_get(lpfc_fcf_record_switch_name_0, fcf_record),
  			bf_get(lpfc_fcf_record_switch_name_1, fcf_record),
  			bf_get(lpfc_fcf_record_switch_name_2, fcf_record),
  			bf_get(lpfc_fcf_record_switch_name_3, fcf_record),
  			bf_get(lpfc_fcf_record_switch_name_4, fcf_record),
  			bf_get(lpfc_fcf_record_switch_name_5, fcf_record),
  			bf_get(lpfc_fcf_record_switch_name_6, fcf_record),
  			bf_get(lpfc_fcf_record_switch_name_7, fcf_record),
  			next_fcf_index);
  }
  
  /**
   * lpfc_sli4_fcf_record_match - testing new FCF record for matching existing FCF
   * @phba: pointer to lpfc hba data structure.
   * @fcf_rec: pointer to an existing FCF record.
   * @new_fcf_record: pointer to a new FCF record.
   * @new_vlan_id: vlan id from the new FCF record.
   *
   * This function performs matching test of a new FCF record against an existing
   * FCF record. If the new_vlan_id passed in is LPFC_FCOE_IGNORE_VID, vlan id
   * will not be used as part of the FCF record matching criteria.
   *
   * Returns true if all the fields matching, otherwise returns false.
   */
  static bool
  lpfc_sli4_fcf_record_match(struct lpfc_hba *phba,
  			   struct lpfc_fcf_rec *fcf_rec,
  			   struct fcf_record *new_fcf_record,
  			   uint16_t new_vlan_id)
  {
  	if (new_vlan_id != LPFC_FCOE_IGNORE_VID)
  		if (!lpfc_vlan_id_match(fcf_rec->vlan_id, new_vlan_id))
  			return false;
  	if (!lpfc_mac_addr_match(fcf_rec->mac_addr, new_fcf_record))
  		return false;
  	if (!lpfc_sw_name_match(fcf_rec->switch_name, new_fcf_record))
  		return false;
  	if (!lpfc_fab_name_match(fcf_rec->fabric_name, new_fcf_record))
  		return false;
  	if (fcf_rec->priority != new_fcf_record->fip_priority)
  		return false;
  	return true;
  }
  
  /**
   * lpfc_sli4_fcf_rr_next_proc - processing next roundrobin fcf
   * @vport: Pointer to vport object.
   * @fcf_index: index to next fcf.
   *
   * This function processing the roundrobin fcf failover to next fcf index.
   * When this function is invoked, there will be a current fcf registered
   * for flogi.
   * Return: 0 for continue retrying flogi on currently registered fcf;
   *         1 for stop flogi on currently registered fcf;
   */
  int lpfc_sli4_fcf_rr_next_proc(struct lpfc_vport *vport, uint16_t fcf_index)
  {
  	struct lpfc_hba *phba = vport->phba;
  	int rc;
  
  	if (fcf_index == LPFC_FCOE_FCF_NEXT_NONE) {
  		spin_lock_irq(&phba->hbalock);
  		if (phba->hba_flag & HBA_DEVLOSS_TMO) {
  			spin_unlock_irq(&phba->hbalock);
  			lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  					"2872 Devloss tmo with no eligible "
  					"FCF, unregister in-use FCF (x%x) "
  					"and rescan FCF table\n",
  					phba->fcf.current_rec.fcf_indx);
  			lpfc_unregister_fcf_rescan(phba);
  			goto stop_flogi_current_fcf;
  		}
  		/* Mark the end to FLOGI roundrobin failover */
  		phba->hba_flag &= ~FCF_RR_INPROG;
  		/* Allow action to new fcf asynchronous event */
  		phba->fcf.fcf_flag &= ~(FCF_AVAILABLE | FCF_SCAN_DONE);
  		spin_unlock_irq(&phba->hbalock);
  		lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  				"2865 No FCF available, stop roundrobin FCF "
  				"failover and change port state:x%x/x%x\n",
  				phba->pport->port_state, LPFC_VPORT_UNKNOWN);
  		phba->pport->port_state = LPFC_VPORT_UNKNOWN;
  
  		if (!phba->fcf.fcf_redisc_attempted) {
  			lpfc_unregister_fcf(phba);
  
  			rc = lpfc_sli4_redisc_fcf_table(phba);
  			if (!rc) {
  				lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  						"3195 Rediscover FCF table\n");
  				phba->fcf.fcf_redisc_attempted = 1;
  				lpfc_sli4_clear_fcf_rr_bmask(phba);
  			} else {
  				lpfc_printf_log(phba, KERN_WARNING, LOG_FIP,
  						"3196 Rediscover FCF table "
  						"failed. Status:x%x\n", rc);
  			}
  		} else {
  			lpfc_printf_log(phba, KERN_WARNING, LOG_FIP,
  					"3197 Already rediscover FCF table "
  					"attempted. No more retry\n");
  		}
  		goto stop_flogi_current_fcf;
  	} else {
  		lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_ELS,
  				"2794 Try FLOGI roundrobin FCF failover to "
  				"(x%x)\n", fcf_index);
  		rc = lpfc_sli4_fcf_rr_read_fcf_rec(phba, fcf_index);
  		if (rc)
  			lpfc_printf_log(phba, KERN_WARNING, LOG_FIP | LOG_ELS,
  					"2761 FLOGI roundrobin FCF failover "
  					"failed (rc:x%x) to read FCF (x%x)\n",
  					rc, phba->fcf.current_rec.fcf_indx);
  		else
  			goto stop_flogi_current_fcf;
  	}
  	return 0;
  
  stop_flogi_current_fcf:
  	lpfc_can_disctmo(vport);
  	return 1;
  }
  
  /**
   * lpfc_sli4_fcf_pri_list_del
   * @phba: pointer to lpfc hba data structure.
   * @fcf_index: the index of the fcf record to delete
   * This routine checks the on list flag of the fcf_index to be deleted.
   * If it is one the list then it is removed from the list, and the flag
   * is cleared. This routine grab the hbalock before removing the fcf
   * record from the list.
   **/
  static void lpfc_sli4_fcf_pri_list_del(struct lpfc_hba *phba,
  			uint16_t fcf_index)
  {
  	struct lpfc_fcf_pri *new_fcf_pri;
  
  	new_fcf_pri = &phba->fcf.fcf_pri[fcf_index];
  	lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  		"3058 deleting idx x%x pri x%x flg x%x\n",
  		fcf_index, new_fcf_pri->fcf_rec.priority,
  		 new_fcf_pri->fcf_rec.flag);
  	spin_lock_irq(&phba->hbalock);
  	if (new_fcf_pri->fcf_rec.flag & LPFC_FCF_ON_PRI_LIST) {
  		if (phba->fcf.current_rec.priority ==
  				new_fcf_pri->fcf_rec.priority)
  			phba->fcf.eligible_fcf_cnt--;
  		list_del_init(&new_fcf_pri->list);
  		new_fcf_pri->fcf_rec.flag &= ~LPFC_FCF_ON_PRI_LIST;
  	}
  	spin_unlock_irq(&phba->hbalock);
  }
  
  /**
   * lpfc_sli4_set_fcf_flogi_fail
   * @phba: pointer to lpfc hba data structure.
   * @fcf_index: the index of the fcf record to update
   * This routine acquires the hbalock and then set the LPFC_FCF_FLOGI_FAILED
   * flag so the the round robin slection for the particular priority level
   * will try a different fcf record that does not have this bit set.
   * If the fcf record is re-read for any reason this flag is cleared brfore
   * adding it to the priority list.
   **/
  void
  lpfc_sli4_set_fcf_flogi_fail(struct lpfc_hba *phba, uint16_t fcf_index)
  {
  	struct lpfc_fcf_pri *new_fcf_pri;
  	new_fcf_pri = &phba->fcf.fcf_pri[fcf_index];
  	spin_lock_irq(&phba->hbalock);
  	new_fcf_pri->fcf_rec.flag |= LPFC_FCF_FLOGI_FAILED;
  	spin_unlock_irq(&phba->hbalock);
  }
  
  /**
   * lpfc_sli4_fcf_pri_list_add
   * @phba: pointer to lpfc hba data structure.
   * @fcf_index: the index of the fcf record to add
   * @new_fcf_record: pointer to a new FCF record.
   * This routine checks the priority of the fcf_index to be added.
   * If it is a lower priority than the current head of the fcf_pri list
   * then it is added to the list in the right order.
   * If it is the same priority as the current head of the list then it
   * is added to the head of the list and its bit in the rr_bmask is set.
   * If the fcf_index to be added is of a higher priority than the current
   * head of the list then the rr_bmask is cleared, its bit is set in the
   * rr_bmask and it is added to the head of the list.
   * returns:
   * 0=success 1=failure
   **/
  static int lpfc_sli4_fcf_pri_list_add(struct lpfc_hba *phba,
  	uint16_t fcf_index,
  	struct fcf_record *new_fcf_record)
  {
  	uint16_t current_fcf_pri;
  	uint16_t last_index;
  	struct lpfc_fcf_pri *fcf_pri;
  	struct lpfc_fcf_pri *next_fcf_pri;
  	struct lpfc_fcf_pri *new_fcf_pri;
  	int ret;
  
  	new_fcf_pri = &phba->fcf.fcf_pri[fcf_index];
  	lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  		"3059 adding idx x%x pri x%x flg x%x\n",
  		fcf_index, new_fcf_record->fip_priority,
  		 new_fcf_pri->fcf_rec.flag);
  	spin_lock_irq(&phba->hbalock);
  	if (new_fcf_pri->fcf_rec.flag & LPFC_FCF_ON_PRI_LIST)
  		list_del_init(&new_fcf_pri->list);
  	new_fcf_pri->fcf_rec.fcf_index = fcf_index;
  	new_fcf_pri->fcf_rec.priority = new_fcf_record->fip_priority;
  	if (list_empty(&phba->fcf.fcf_pri_list)) {
  		list_add(&new_fcf_pri->list, &phba->fcf.fcf_pri_list);
  		ret = lpfc_sli4_fcf_rr_index_set(phba,
  				new_fcf_pri->fcf_rec.fcf_index);
  		goto out;
  	}
  
  	last_index = find_first_bit(phba->fcf.fcf_rr_bmask,
  				LPFC_SLI4_FCF_TBL_INDX_MAX);
  	if (last_index >= LPFC_SLI4_FCF_TBL_INDX_MAX) {
  		ret = 0; /* Empty rr list */
  		goto out;
  	}
  	current_fcf_pri = phba->fcf.fcf_pri[last_index].fcf_rec.priority;
  	if (new_fcf_pri->fcf_rec.priority <=  current_fcf_pri) {
  		list_add(&new_fcf_pri->list, &phba->fcf.fcf_pri_list);
  		if (new_fcf_pri->fcf_rec.priority <  current_fcf_pri) {
  			memset(phba->fcf.fcf_rr_bmask, 0,
  				sizeof(*phba->fcf.fcf_rr_bmask));
  			/* fcfs_at_this_priority_level = 1; */
  			phba->fcf.eligible_fcf_cnt = 1;
  		} else
  			/* fcfs_at_this_priority_level++; */
  			phba->fcf.eligible_fcf_cnt++;
  		ret = lpfc_sli4_fcf_rr_index_set(phba,
  				new_fcf_pri->fcf_rec.fcf_index);
  		goto out;
  	}
  
  	list_for_each_entry_safe(fcf_pri, next_fcf_pri,
  				&phba->fcf.fcf_pri_list, list) {
  		if (new_fcf_pri->fcf_rec.priority <=
  				fcf_pri->fcf_rec.priority) {
  			if (fcf_pri->list.prev == &phba->fcf.fcf_pri_list)
  				list_add(&new_fcf_pri->list,
  						&phba->fcf.fcf_pri_list);
  			else
  				list_add(&new_fcf_pri->list,
  					 &((struct lpfc_fcf_pri *)
  					fcf_pri->list.prev)->list);
  			ret = 0;
  			goto out;
  		} else if (fcf_pri->list.next == &phba->fcf.fcf_pri_list
  			|| new_fcf_pri->fcf_rec.priority <
  				next_fcf_pri->fcf_rec.priority) {
  			list_add(&new_fcf_pri->list, &fcf_pri->list);
  			ret = 0;
  			goto out;
  		}
  		if (new_fcf_pri->fcf_rec.priority > fcf_pri->fcf_rec.priority)
  			continue;
  
  	}
  	ret = 1;
  out:
  	/* we use = instead of |= to clear the FLOGI_FAILED flag. */
  	new_fcf_pri->fcf_rec.flag = LPFC_FCF_ON_PRI_LIST;
  	spin_unlock_irq(&phba->hbalock);
  	return ret;
  }
  
  /**
   * lpfc_mbx_cmpl_fcf_scan_read_fcf_rec - fcf scan read_fcf mbox cmpl handler.
   * @phba: pointer to lpfc hba data structure.
   * @mboxq: pointer to mailbox object.
   *
   * This function iterates through all the fcf records available in
   * HBA and chooses the optimal FCF record for discovery. After finding
   * the FCF for discovery it registers the FCF record and kicks start
   * discovery.
   * If FCF_IN_USE flag is set in currently used FCF, the routine tries to
   * use an FCF record which matches fabric name and mac address of the
   * currently used FCF record.
   * If the driver supports only one FCF, it will try to use the FCF record
   * used by BOOT_BIOS.
   */
  void
  lpfc_mbx_cmpl_fcf_scan_read_fcf_rec(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
  {
  	struct fcf_record *new_fcf_record;
  	uint32_t boot_flag, addr_mode;
  	uint16_t fcf_index, next_fcf_index;
  	struct lpfc_fcf_rec *fcf_rec = NULL;
  	uint16_t vlan_id = LPFC_FCOE_NULL_VID;
  	bool select_new_fcf;
  	int rc;
  
  	/* If there is pending FCoE event restart FCF table scan */
  	if (lpfc_check_pending_fcoe_event(phba, LPFC_SKIP_UNREG_FCF)) {
  		lpfc_sli4_mbox_cmd_free(phba, mboxq);
  		return;
  	}
  
  	/* Parse the FCF record from the non-embedded mailbox command */
  	new_fcf_record = lpfc_sli4_fcf_rec_mbox_parse(phba, mboxq,
  						      &next_fcf_index);
  	if (!new_fcf_record) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"2765 Mailbox command READ_FCF_RECORD "
  				"failed to retrieve a FCF record.\n");
  		/* Let next new FCF event trigger fast failover */
  		spin_lock_irq(&phba->hbalock);
  		phba->hba_flag &= ~FCF_TS_INPROG;
  		spin_unlock_irq(&phba->hbalock);
  		lpfc_sli4_mbox_cmd_free(phba, mboxq);
  		return;
  	}
  
  	/* Check the FCF record against the connection list */
  	rc = lpfc_match_fcf_conn_list(phba, new_fcf_record, &boot_flag,
  				      &addr_mode, &vlan_id);
  
  	/* Log the FCF record information if turned on */
  	lpfc_sli4_log_fcf_record_info(phba, new_fcf_record, vlan_id,
  				      next_fcf_index);
  
  	/*
  	 * If the fcf record does not match with connect list entries
  	 * read the next entry; otherwise, this is an eligible FCF
  	 * record for roundrobin FCF failover.
  	 */
  	if (!rc) {
  		lpfc_sli4_fcf_pri_list_del(phba,
  					bf_get(lpfc_fcf_record_fcf_index,
  					       new_fcf_record));
  		lpfc_printf_log(phba, KERN_WARNING, LOG_FIP,
  				"2781 FCF (x%x) failed connection "
  				"list check: (x%x/x%x/%x)\n",
  				bf_get(lpfc_fcf_record_fcf_index,
  				       new_fcf_record),
  				bf_get(lpfc_fcf_record_fcf_avail,
  				       new_fcf_record),
  				bf_get(lpfc_fcf_record_fcf_valid,
  				       new_fcf_record),
  				bf_get(lpfc_fcf_record_fcf_sol,
  				       new_fcf_record));
  		if ((phba->fcf.fcf_flag & FCF_IN_USE) &&
  		    lpfc_sli4_fcf_record_match(phba, &phba->fcf.current_rec,
  		    new_fcf_record, LPFC_FCOE_IGNORE_VID)) {
  			if (bf_get(lpfc_fcf_record_fcf_index, new_fcf_record) !=
  			    phba->fcf.current_rec.fcf_indx) {
  				lpfc_printf_log(phba, KERN_ERR,
  						LOG_TRACE_EVENT,
  					"2862 FCF (x%x) matches property "
  					"of in-use FCF (x%x)\n",
  					bf_get(lpfc_fcf_record_fcf_index,
  					       new_fcf_record),
  					phba->fcf.current_rec.fcf_indx);
  				goto read_next_fcf;
  			}
  			/*
  			 * In case the current in-use FCF record becomes
  			 * invalid/unavailable during FCF discovery that
  			 * was not triggered by fast FCF failover process,
  			 * treat it as fast FCF failover.
  			 */
  			if (!(phba->fcf.fcf_flag & FCF_REDISC_PEND) &&
  			    !(phba->fcf.fcf_flag & FCF_REDISC_FOV)) {
  				lpfc_printf_log(phba, KERN_WARNING, LOG_FIP,
  						"2835 Invalid in-use FCF "
  						"(x%x), enter FCF failover "
  						"table scan.\n",
  						phba->fcf.current_rec.fcf_indx);
  				spin_lock_irq(&phba->hbalock);
  				phba->fcf.fcf_flag |= FCF_REDISC_FOV;
  				spin_unlock_irq(&phba->hbalock);
  				lpfc_sli4_mbox_cmd_free(phba, mboxq);
  				lpfc_sli4_fcf_scan_read_fcf_rec(phba,
  						LPFC_FCOE_FCF_GET_FIRST);
  				return;
  			}
  		}
  		goto read_next_fcf;
  	} else {
  		fcf_index = bf_get(lpfc_fcf_record_fcf_index, new_fcf_record);
  		rc = lpfc_sli4_fcf_pri_list_add(phba, fcf_index,
  							new_fcf_record);
  		if (rc)
  			goto read_next_fcf;
  	}
  
  	/*
  	 * If this is not the first FCF discovery of the HBA, use last
  	 * FCF record for the discovery. The condition that a rescan
  	 * matches the in-use FCF record: fabric name, switch name, mac
  	 * address, and vlan_id.
  	 */
  	spin_lock_irq(&phba->hbalock);
  	if (phba->fcf.fcf_flag & FCF_IN_USE) {
  		if (phba->cfg_fcf_failover_policy == LPFC_FCF_FOV &&
  			lpfc_sli4_fcf_record_match(phba, &phba->fcf.current_rec,
  		    new_fcf_record, vlan_id)) {
  			if (bf_get(lpfc_fcf_record_fcf_index, new_fcf_record) ==
  			    phba->fcf.current_rec.fcf_indx) {
  				phba->fcf.fcf_flag |= FCF_AVAILABLE;
  				if (phba->fcf.fcf_flag & FCF_REDISC_PEND)
  					/* Stop FCF redisc wait timer */
  					__lpfc_sli4_stop_fcf_redisc_wait_timer(
  									phba);
  				else if (phba->fcf.fcf_flag & FCF_REDISC_FOV)
  					/* Fast failover, mark completed */
  					phba->fcf.fcf_flag &= ~FCF_REDISC_FOV;
  				spin_unlock_irq(&phba->hbalock);
  				lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  						"2836 New FCF matches in-use "
  						"FCF (x%x), port_state:x%x, "
  						"fc_flag:x%x\n",
  						phba->fcf.current_rec.fcf_indx,
  						phba->pport->port_state,
  						phba->pport->fc_flag);
  				goto out;
  			} else
  				lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  					"2863 New FCF (x%x) matches "
  					"property of in-use FCF (x%x)\n",
  					bf_get(lpfc_fcf_record_fcf_index,
  					       new_fcf_record),
  					phba->fcf.current_rec.fcf_indx);
  		}
  		/*
  		 * Read next FCF record from HBA searching for the matching
  		 * with in-use record only if not during the fast failover
  		 * period. In case of fast failover period, it shall try to
  		 * determine whether the FCF record just read should be the
  		 * next candidate.
  		 */
  		if (!(phba->fcf.fcf_flag & FCF_REDISC_FOV)) {
  			spin_unlock_irq(&phba->hbalock);
  			goto read_next_fcf;
  		}
  	}
  	/*
  	 * Update on failover FCF record only if it's in FCF fast-failover
  	 * period; otherwise, update on current FCF record.
  	 */
  	if (phba->fcf.fcf_flag & FCF_REDISC_FOV)
  		fcf_rec = &phba->fcf.failover_rec;
  	else
  		fcf_rec = &phba->fcf.current_rec;
  
  	if (phba->fcf.fcf_flag & FCF_AVAILABLE) {
  		/*
  		 * If the driver FCF record does not have boot flag
  		 * set and new hba fcf record has boot flag set, use
  		 * the new hba fcf record.
  		 */
  		if (boot_flag && !(fcf_rec->flag & BOOT_ENABLE)) {
  			/* Choose this FCF record */
  			lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  					"2837 Update current FCF record "
  					"(x%x) with new FCF record (x%x)\n",
  					fcf_rec->fcf_indx,
  					bf_get(lpfc_fcf_record_fcf_index,
  					new_fcf_record));
  			__lpfc_update_fcf_record(phba, fcf_rec, new_fcf_record,
  					addr_mode, vlan_id, BOOT_ENABLE);
  			spin_unlock_irq(&phba->hbalock);
  			goto read_next_fcf;
  		}
  		/*
  		 * If the driver FCF record has boot flag set and the
  		 * new hba FCF record does not have boot flag, read
  		 * the next FCF record.
  		 */
  		if (!boot_flag && (fcf_rec->flag & BOOT_ENABLE)) {
  			spin_unlock_irq(&phba->hbalock);
  			goto read_next_fcf;
  		}
  		/*
  		 * If the new hba FCF record has lower priority value
  		 * than the driver FCF record, use the new record.
  		 */
  		if (new_fcf_record->fip_priority < fcf_rec->priority) {
  			/* Choose the new FCF record with lower priority */
  			lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  					"2838 Update current FCF record "
  					"(x%x) with new FCF record (x%x)\n",
  					fcf_rec->fcf_indx,
  					bf_get(lpfc_fcf_record_fcf_index,
  					       new_fcf_record));
  			__lpfc_update_fcf_record(phba, fcf_rec, new_fcf_record,
  					addr_mode, vlan_id, 0);
  			/* Reset running random FCF selection count */
  			phba->fcf.eligible_fcf_cnt = 1;
  		} else if (new_fcf_record->fip_priority == fcf_rec->priority) {
  			/* Update running random FCF selection count */
  			phba->fcf.eligible_fcf_cnt++;
  			select_new_fcf = lpfc_sli4_new_fcf_random_select(phba,
  						phba->fcf.eligible_fcf_cnt);
  			if (select_new_fcf) {
  				lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  					"2839 Update current FCF record "
  					"(x%x) with new FCF record (x%x)\n",
  					fcf_rec->fcf_indx,
  					bf_get(lpfc_fcf_record_fcf_index,
  					       new_fcf_record));
  				/* Choose the new FCF by random selection */
  				__lpfc_update_fcf_record(phba, fcf_rec,
  							 new_fcf_record,
  							 addr_mode, vlan_id, 0);
  			}
  		}
  		spin_unlock_irq(&phba->hbalock);
  		goto read_next_fcf;
  	}
  	/*
  	 * This is the first suitable FCF record, choose this record for
  	 * initial best-fit FCF.
  	 */
  	if (fcf_rec) {
  		lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  				"2840 Update initial FCF candidate "
  				"with FCF (x%x)\n",
  				bf_get(lpfc_fcf_record_fcf_index,
  				       new_fcf_record));
  		__lpfc_update_fcf_record(phba, fcf_rec, new_fcf_record,
  					 addr_mode, vlan_id, (boot_flag ?
  					 BOOT_ENABLE : 0));
  		phba->fcf.fcf_flag |= FCF_AVAILABLE;
  		/* Setup initial running random FCF selection count */
  		phba->fcf.eligible_fcf_cnt = 1;
  	}
  	spin_unlock_irq(&phba->hbalock);
  	goto read_next_fcf;
  
  read_next_fcf:
  	lpfc_sli4_mbox_cmd_free(phba, mboxq);
  	if (next_fcf_index == LPFC_FCOE_FCF_NEXT_NONE || next_fcf_index == 0) {
  		if (phba->fcf.fcf_flag & FCF_REDISC_FOV) {
  			/*
  			 * Case of FCF fast failover scan
  			 */
  
  			/*
  			 * It has not found any suitable FCF record, cancel
  			 * FCF scan inprogress, and do nothing
  			 */
  			if (!(phba->fcf.failover_rec.flag & RECORD_VALID)) {
  				lpfc_printf_log(phba, KERN_WARNING, LOG_FIP,
  					       "2782 No suitable FCF found: "
  					       "(x%x/x%x)\n",
  					       phba->fcoe_eventtag_at_fcf_scan,
  					       bf_get(lpfc_fcf_record_fcf_index,
  						      new_fcf_record));
  				spin_lock_irq(&phba->hbalock);
  				if (phba->hba_flag & HBA_DEVLOSS_TMO) {
  					phba->hba_flag &= ~FCF_TS_INPROG;
  					spin_unlock_irq(&phba->hbalock);
  					/* Unregister in-use FCF and rescan */
  					lpfc_printf_log(phba, KERN_INFO,
  							LOG_FIP,
  							"2864 On devloss tmo "
  							"unreg in-use FCF and "
  							"rescan FCF table\n");
  					lpfc_unregister_fcf_rescan(phba);
  					return;
  				}
  				/*
  				 * Let next new FCF event trigger fast failover
  				 */
  				phba->hba_flag &= ~FCF_TS_INPROG;
  				spin_unlock_irq(&phba->hbalock);
  				return;
  			}
  			/*
  			 * It has found a suitable FCF record that is not
  			 * the same as in-use FCF record, unregister the
  			 * in-use FCF record, replace the in-use FCF record
  			 * with the new FCF record, mark FCF fast failover
  			 * completed, and then start register the new FCF
  			 * record.
  			 */
  
  			/* Unregister the current in-use FCF record */
  			lpfc_unregister_fcf(phba);
  
  			/* Replace in-use record with the new record */
  			lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  					"2842 Replace in-use FCF (x%x) "
  					"with failover FCF (x%x)\n",
  					phba->fcf.current_rec.fcf_indx,
  					phba->fcf.failover_rec.fcf_indx);
  			memcpy(&phba->fcf.current_rec,
  			       &phba->fcf.failover_rec,
  			       sizeof(struct lpfc_fcf_rec));
  			/*
  			 * Mark the fast FCF failover rediscovery completed
  			 * and the start of the first round of the roundrobin
  			 * FCF failover.
  			 */
  			spin_lock_irq(&phba->hbalock);
  			phba->fcf.fcf_flag &= ~FCF_REDISC_FOV;
  			spin_unlock_irq(&phba->hbalock);
  			/* Register to the new FCF record */
  			lpfc_register_fcf(phba);
  		} else {
  			/*
  			 * In case of transaction period to fast FCF failover,
  			 * do nothing when search to the end of the FCF table.
  			 */
  			if ((phba->fcf.fcf_flag & FCF_REDISC_EVT) ||
  			    (phba->fcf.fcf_flag & FCF_REDISC_PEND))
  				return;
  
  			if (phba->cfg_fcf_failover_policy == LPFC_FCF_FOV &&
  				phba->fcf.fcf_flag & FCF_IN_USE) {
  				/*
  				 * In case the current in-use FCF record no
  				 * longer existed during FCF discovery that
  				 * was not triggered by fast FCF failover
  				 * process, treat it as fast FCF failover.
  				 */
  				lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  						"2841 In-use FCF record (x%x) "
  						"not reported, entering fast "
  						"FCF failover mode scanning.\n",
  						phba->fcf.current_rec.fcf_indx);
  				spin_lock_irq(&phba->hbalock);
  				phba->fcf.fcf_flag |= FCF_REDISC_FOV;
  				spin_unlock_irq(&phba->hbalock);
  				lpfc_sli4_fcf_scan_read_fcf_rec(phba,
  						LPFC_FCOE_FCF_GET_FIRST);
  				return;
  			}
  			/* Register to the new FCF record */
  			lpfc_register_fcf(phba);
  		}
  	} else
  		lpfc_sli4_fcf_scan_read_fcf_rec(phba, next_fcf_index);
  	return;
  
  out:
  	lpfc_sli4_mbox_cmd_free(phba, mboxq);
  	lpfc_register_fcf(phba);
  
  	return;
  }
  
  /**
   * lpfc_mbx_cmpl_fcf_rr_read_fcf_rec - fcf roundrobin read_fcf mbox cmpl hdler
   * @phba: pointer to lpfc hba data structure.
   * @mboxq: pointer to mailbox object.
   *
   * This is the callback function for FLOGI failure roundrobin FCF failover
   * read FCF record mailbox command from the eligible FCF record bmask for
   * performing the failover. If the FCF read back is not valid/available, it
   * fails through to retrying FLOGI to the currently registered FCF again.
   * Otherwise, if the FCF read back is valid and available, it will set the
   * newly read FCF record to the failover FCF record, unregister currently
   * registered FCF record, copy the failover FCF record to the current
   * FCF record, and then register the current FCF record before proceeding
   * to trying FLOGI on the new failover FCF.
   */
  void
  lpfc_mbx_cmpl_fcf_rr_read_fcf_rec(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
  {
  	struct fcf_record *new_fcf_record;
  	uint32_t boot_flag, addr_mode;
  	uint16_t next_fcf_index, fcf_index;
  	uint16_t current_fcf_index;
  	uint16_t vlan_id;
  	int rc;
  
  	/* If link state is not up, stop the roundrobin failover process */
  	if (phba->link_state < LPFC_LINK_UP) {
  		spin_lock_irq(&phba->hbalock);
  		phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
  		phba->hba_flag &= ~FCF_RR_INPROG;
  		spin_unlock_irq(&phba->hbalock);
  		goto out;
  	}
  
  	/* Parse the FCF record from the non-embedded mailbox command */
  	new_fcf_record = lpfc_sli4_fcf_rec_mbox_parse(phba, mboxq,
  						      &next_fcf_index);
  	if (!new_fcf_record) {
  		lpfc_printf_log(phba, KERN_WARNING, LOG_FIP,
  				"2766 Mailbox command READ_FCF_RECORD "
  				"failed to retrieve a FCF record. "
  				"hba_flg x%x fcf_flg x%x\n", phba->hba_flag,
  				phba->fcf.fcf_flag);
  		lpfc_unregister_fcf_rescan(phba);
  		goto out;
  	}
  
  	/* Get the needed parameters from FCF record */
  	rc = lpfc_match_fcf_conn_list(phba, new_fcf_record, &boot_flag,
  				      &addr_mode, &vlan_id);
  
  	/* Log the FCF record information if turned on */
  	lpfc_sli4_log_fcf_record_info(phba, new_fcf_record, vlan_id,
  				      next_fcf_index);
  
  	fcf_index = bf_get(lpfc_fcf_record_fcf_index, new_fcf_record);
  	if (!rc) {
  		lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  				"2848 Remove ineligible FCF (x%x) from "
  				"from roundrobin bmask\n", fcf_index);
  		/* Clear roundrobin bmask bit for ineligible FCF */
  		lpfc_sli4_fcf_rr_index_clear(phba, fcf_index);
  		/* Perform next round of roundrobin FCF failover */
  		fcf_index = lpfc_sli4_fcf_rr_next_index_get(phba);
  		rc = lpfc_sli4_fcf_rr_next_proc(phba->pport, fcf_index);
  		if (rc)
  			goto out;
  		goto error_out;
  	}
  
  	if (fcf_index == phba->fcf.current_rec.fcf_indx) {
  		lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  				"2760 Perform FLOGI roundrobin FCF failover: "
  				"FCF (x%x) back to FCF (x%x)\n",
  				phba->fcf.current_rec.fcf_indx, fcf_index);
  		/* Wait 500 ms before retrying FLOGI to current FCF */
  		msleep(500);
  		lpfc_issue_init_vfi(phba->pport);
  		goto out;
  	}
  
  	/* Upload new FCF record to the failover FCF record */
  	lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  			"2834 Update current FCF (x%x) with new FCF (x%x)\n",
  			phba->fcf.failover_rec.fcf_indx, fcf_index);
  	spin_lock_irq(&phba->hbalock);
  	__lpfc_update_fcf_record(phba, &phba->fcf.failover_rec,
  				 new_fcf_record, addr_mode, vlan_id,
  				 (boot_flag ? BOOT_ENABLE : 0));
  	spin_unlock_irq(&phba->hbalock);
  
  	current_fcf_index = phba->fcf.current_rec.fcf_indx;
  
  	/* Unregister the current in-use FCF record */
  	lpfc_unregister_fcf(phba);
  
  	/* Replace in-use record with the new record */
  	memcpy(&phba->fcf.current_rec, &phba->fcf.failover_rec,
  	       sizeof(struct lpfc_fcf_rec));
  
  	lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  			"2783 Perform FLOGI roundrobin FCF failover: FCF "
  			"(x%x) to FCF (x%x)\n", current_fcf_index, fcf_index);
  
  error_out:
  	lpfc_register_fcf(phba);
  out:
  	lpfc_sli4_mbox_cmd_free(phba, mboxq);
  }
  
  /**
   * lpfc_mbx_cmpl_read_fcf_rec - read fcf completion handler.
   * @phba: pointer to lpfc hba data structure.
   * @mboxq: pointer to mailbox object.
   *
   * This is the callback function of read FCF record mailbox command for
   * updating the eligible FCF bmask for FLOGI failure roundrobin FCF
   * failover when a new FCF event happened. If the FCF read back is
   * valid/available and it passes the connection list check, it updates
   * the bmask for the eligible FCF record for roundrobin failover.
   */
  void
  lpfc_mbx_cmpl_read_fcf_rec(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
  {
  	struct fcf_record *new_fcf_record;
  	uint32_t boot_flag, addr_mode;
  	uint16_t fcf_index, next_fcf_index;
  	uint16_t vlan_id;
  	int rc;
  
  	/* If link state is not up, no need to proceed */
  	if (phba->link_state < LPFC_LINK_UP)
  		goto out;
  
  	/* If FCF discovery period is over, no need to proceed */
  	if (!(phba->fcf.fcf_flag & FCF_DISCOVERY))
  		goto out;
  
  	/* Parse the FCF record from the non-embedded mailbox command */
  	new_fcf_record = lpfc_sli4_fcf_rec_mbox_parse(phba, mboxq,
  						      &next_fcf_index);
  	if (!new_fcf_record) {
  		lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
  				"2767 Mailbox command READ_FCF_RECORD "
  				"failed to retrieve a FCF record.\n");
  		goto out;
  	}
  
  	/* Check the connection list for eligibility */
  	rc = lpfc_match_fcf_conn_list(phba, new_fcf_record, &boot_flag,
  				      &addr_mode, &vlan_id);
  
  	/* Log the FCF record information if turned on */
  	lpfc_sli4_log_fcf_record_info(phba, new_fcf_record, vlan_id,
  				      next_fcf_index);
  
  	if (!rc)
  		goto out;
  
  	/* Update the eligible FCF record index bmask */
  	fcf_index = bf_get(lpfc_fcf_record_fcf_index, new_fcf_record);
  
  	rc = lpfc_sli4_fcf_pri_list_add(phba, fcf_index, new_fcf_record);
  
  out:
  	lpfc_sli4_mbox_cmd_free(phba, mboxq);
  }
  
  /**
   * lpfc_init_vfi_cmpl - Completion handler for init_vfi mbox command.
   * @phba: pointer to lpfc hba data structure.
   * @mboxq: pointer to mailbox data structure.
   *
   * This function handles completion of init vfi mailbox command.
   */
  static void
  lpfc_init_vfi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
  {
  	struct lpfc_vport *vport = mboxq->vport;
  
  	/*
  	 * VFI not supported on interface type 0, just do the flogi
  	 * Also continue if the VFI is in use - just use the same one.
  	 */
  	if (mboxq->u.mb.mbxStatus &&
  	    (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) !=
  			LPFC_SLI_INTF_IF_TYPE_0) &&
  	    mboxq->u.mb.mbxStatus != MBX_VFI_IN_USE) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "2891 Init VFI mailbox failed 0x%x\n",
  				 mboxq->u.mb.mbxStatus);
  		mempool_free(mboxq, phba->mbox_mem_pool);
  		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
  		return;
  	}
  
  	lpfc_initial_flogi(vport);
  	mempool_free(mboxq, phba->mbox_mem_pool);
  	return;
  }
  
  /**
   * lpfc_issue_init_vfi - Issue init_vfi mailbox command.
   * @vport: pointer to lpfc_vport data structure.
   *
   * This function issue a init_vfi mailbox command to initialize the VFI and
   * VPI for the physical port.
   */
  void
  lpfc_issue_init_vfi(struct lpfc_vport *vport)
  {
  	LPFC_MBOXQ_t *mboxq;
  	int rc;
  	struct lpfc_hba *phba = vport->phba;
  
  	mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  	if (!mboxq) {
  		lpfc_printf_vlog(vport, KERN_ERR,
  			LOG_TRACE_EVENT, "2892 Failed to allocate "
  			"init_vfi mailbox\n");
  		return;
  	}
  	lpfc_init_vfi(mboxq, vport);
  	mboxq->mbox_cmpl = lpfc_init_vfi_cmpl;
  	rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
  	if (rc == MBX_NOT_FINISHED) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "2893 Failed to issue init_vfi mailbox\n");
  		mempool_free(mboxq, vport->phba->mbox_mem_pool);
  	}
  }
  
  /**
   * lpfc_init_vpi_cmpl - Completion handler for init_vpi mbox command.
   * @phba: pointer to lpfc hba data structure.
   * @mboxq: pointer to mailbox data structure.
   *
   * This function handles completion of init vpi mailbox command.
   */
  void
  lpfc_init_vpi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
  {
  	struct lpfc_vport *vport = mboxq->vport;
  	struct lpfc_nodelist *ndlp;
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	if (mboxq->u.mb.mbxStatus) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "2609 Init VPI mailbox failed 0x%x\n",
  				 mboxq->u.mb.mbxStatus);
  		mempool_free(mboxq, phba->mbox_mem_pool);
  		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
  		return;
  	}
  	spin_lock_irq(shost->host_lock);
  	vport->fc_flag &= ~FC_VPORT_NEEDS_INIT_VPI;
  	spin_unlock_irq(shost->host_lock);
  
  	/* If this port is physical port or FDISC is done, do reg_vpi */
  	if ((phba->pport == vport) || (vport->port_state == LPFC_FDISC)) {
  			ndlp = lpfc_findnode_did(vport, Fabric_DID);
  			if (!ndlp)
  				lpfc_printf_vlog(vport, KERN_ERR,
  					LOG_TRACE_EVENT,
  					"2731 Cannot find fabric "
  					"controller node\n");
  			else
  				lpfc_register_new_vport(phba, vport, ndlp);
  			mempool_free(mboxq, phba->mbox_mem_pool);
  			return;
  	}
  
  	if (phba->link_flag & LS_NPIV_FAB_SUPPORTED)
  		lpfc_initial_fdisc(vport);
  	else {
  		lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "2606 No NPIV Fabric support\n");
  	}
  	mempool_free(mboxq, phba->mbox_mem_pool);
  	return;
  }
  
  /**
   * lpfc_issue_init_vpi - Issue init_vpi mailbox command.
   * @vport: pointer to lpfc_vport data structure.
   *
   * This function issue a init_vpi mailbox command to initialize
   * VPI for the vport.
   */
  void
  lpfc_issue_init_vpi(struct lpfc_vport *vport)
  {
  	LPFC_MBOXQ_t *mboxq;
  	int rc, vpi;
  
  	if ((vport->port_type != LPFC_PHYSICAL_PORT) && (!vport->vpi)) {
  		vpi = lpfc_alloc_vpi(vport->phba);
  		if (!vpi) {
  			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  					 "3303 Failed to obtain vport vpi\n");
  			lpfc_vport_set_state(vport, FC_VPORT_FAILED);
  			return;
  		}
  		vport->vpi = vpi;
  	}
  
  	mboxq = mempool_alloc(vport->phba->mbox_mem_pool, GFP_KERNEL);
  	if (!mboxq) {
  		lpfc_printf_vlog(vport, KERN_ERR,
  			LOG_TRACE_EVENT, "2607 Failed to allocate "
  			"init_vpi mailbox\n");
  		return;
  	}
  	lpfc_init_vpi(vport->phba, mboxq, vport->vpi);
  	mboxq->vport = vport;
  	mboxq->mbox_cmpl = lpfc_init_vpi_cmpl;
  	rc = lpfc_sli_issue_mbox(vport->phba, mboxq, MBX_NOWAIT);
  	if (rc == MBX_NOT_FINISHED) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "2608 Failed to issue init_vpi mailbox\n");
  		mempool_free(mboxq, vport->phba->mbox_mem_pool);
  	}
  }
  
  /**
   * lpfc_start_fdiscs - send fdiscs for each vports on this port.
   * @phba: pointer to lpfc hba data structure.
   *
   * This function loops through the list of vports on the @phba and issues an
   * FDISC if possible.
   */
  void
  lpfc_start_fdiscs(struct lpfc_hba *phba)
  {
  	struct lpfc_vport **vports;
  	int i;
  
  	vports = lpfc_create_vport_work_array(phba);
  	if (vports != NULL) {
  		for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
  			if (vports[i]->port_type == LPFC_PHYSICAL_PORT)
  				continue;
  			/* There are no vpi for this vport */
  			if (vports[i]->vpi > phba->max_vpi) {
  				lpfc_vport_set_state(vports[i],
  						     FC_VPORT_FAILED);
  				continue;
  			}
  			if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
  				lpfc_vport_set_state(vports[i],
  						     FC_VPORT_LINKDOWN);
  				continue;
  			}
  			if (vports[i]->fc_flag & FC_VPORT_NEEDS_INIT_VPI) {
  				lpfc_issue_init_vpi(vports[i]);
  				continue;
  			}
  			if (phba->link_flag & LS_NPIV_FAB_SUPPORTED)
  				lpfc_initial_fdisc(vports[i]);
  			else {
  				lpfc_vport_set_state(vports[i],
  						     FC_VPORT_NO_FABRIC_SUPP);
  				lpfc_printf_vlog(vports[i], KERN_ERR,
  						 LOG_TRACE_EVENT,
  						 "0259 No NPIV "
  						 "Fabric support\n");
  			}
  		}
  	}
  	lpfc_destroy_vport_work_array(phba, vports);
  }
  
  void
  lpfc_mbx_cmpl_reg_vfi(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
  {
  	struct lpfc_dmabuf *dmabuf = mboxq->ctx_buf;
  	struct lpfc_vport *vport = mboxq->vport;
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	/*
  	 * VFI not supported for interface type 0, so ignore any mailbox
  	 * error (except VFI in use) and continue with the discovery.
  	 */
  	if (mboxq->u.mb.mbxStatus &&
  	    (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) !=
  			LPFC_SLI_INTF_IF_TYPE_0) &&
  	    mboxq->u.mb.mbxStatus != MBX_VFI_IN_USE) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "2018 REG_VFI mbxStatus error x%x "
  				 "HBA state x%x\n",
  				 mboxq->u.mb.mbxStatus, vport->port_state);
  		if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
  			/* FLOGI failed, use loop map to make discovery list */
  			lpfc_disc_list_loopmap(vport);
  			/* Start discovery */
  			lpfc_disc_start(vport);
  			goto out_free_mem;
  		}
  		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
  		goto out_free_mem;
  	}
  
  	/* If the VFI is already registered, there is nothing else to do
  	 * Unless this was a VFI update and we are in PT2PT mode, then
  	 * we should drop through to set the port state to ready.
  	 */
  	if (vport->fc_flag & FC_VFI_REGISTERED)
  		if (!(phba->sli_rev == LPFC_SLI_REV4 &&
  		      vport->fc_flag & FC_PT2PT))
  			goto out_free_mem;
  
  	/* The VPI is implicitly registered when the VFI is registered */
  	spin_lock_irq(shost->host_lock);
  	vport->vpi_state |= LPFC_VPI_REGISTERED;
  	vport->fc_flag |= FC_VFI_REGISTERED;
  	vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
  	vport->fc_flag &= ~FC_VPORT_NEEDS_INIT_VPI;
  	spin_unlock_irq(shost->host_lock);
  
  	/* In case SLI4 FC loopback test, we are ready */
  	if ((phba->sli_rev == LPFC_SLI_REV4) &&
  	    (phba->link_flag & LS_LOOPBACK_MODE)) {
  		phba->link_state = LPFC_HBA_READY;
  		goto out_free_mem;
  	}
  
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_SLI,
  			 "3313 cmpl reg vfi  port_state:%x fc_flag:%x myDid:%x "
  			 "alpacnt:%d LinkState:%x topology:%x\n",
  			 vport->port_state, vport->fc_flag, vport->fc_myDID,
  			 vport->phba->alpa_map[0],
  			 phba->link_state, phba->fc_topology);
  
  	if (vport->port_state == LPFC_FABRIC_CFG_LINK) {
  		/*
  		 * For private loop or for NPort pt2pt,
  		 * just start discovery and we are done.
  		 */
  		if ((vport->fc_flag & FC_PT2PT) ||
  		    ((phba->fc_topology == LPFC_TOPOLOGY_LOOP) &&
  		    !(vport->fc_flag & FC_PUBLIC_LOOP))) {
  
  			/* Use loop map to make discovery list */
  			lpfc_disc_list_loopmap(vport);
  			/* Start discovery */
  			if (vport->fc_flag & FC_PT2PT)
  				vport->port_state = LPFC_VPORT_READY;
  			else
  				lpfc_disc_start(vport);
  		} else {
  			lpfc_start_fdiscs(phba);
  			lpfc_do_scr_ns_plogi(phba, vport);
  		}
  	}
  
  out_free_mem:
  	mempool_free(mboxq, phba->mbox_mem_pool);
  	if (dmabuf) {
  		lpfc_mbuf_free(phba, dmabuf->virt, dmabuf->phys);
  		kfree(dmabuf);
  	}
  	return;
  }
  
  static void
  lpfc_mbx_cmpl_read_sparam(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
  {
  	MAILBOX_t *mb = &pmb->u.mb;
  	struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *)pmb->ctx_buf;
  	struct lpfc_vport  *vport = pmb->vport;
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct serv_parm *sp = &vport->fc_sparam;
  	uint32_t ed_tov;
  
  	/* Check for error */
  	if (mb->mbxStatus) {
  		/* READ_SPARAM mbox error <mbxStatus> state <hba_state> */
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "0319 READ_SPARAM mbxStatus error x%x "
  				 "hba state x%x>\n",
  				 mb->mbxStatus, vport->port_state);
  		lpfc_linkdown(phba);
  		goto out;
  	}
  
  	memcpy((uint8_t *) &vport->fc_sparam, (uint8_t *) mp->virt,
  	       sizeof (struct serv_parm));
  
  	ed_tov = be32_to_cpu(sp->cmn.e_d_tov);
  	if (sp->cmn.edtovResolution)	/* E_D_TOV ticks are in nanoseconds */
  		ed_tov = (ed_tov + 999999) / 1000000;
  
  	phba->fc_edtov = ed_tov;
  	phba->fc_ratov = (2 * ed_tov) / 1000;
  	if (phba->fc_ratov < FF_DEF_RATOV) {
  		/* RA_TOV should be atleast 10sec for initial flogi */
  		phba->fc_ratov = FF_DEF_RATOV;
  	}
  
  	lpfc_update_vport_wwn(vport);
  	fc_host_port_name(shost) = wwn_to_u64(vport->fc_portname.u.wwn);
  	if (vport->port_type == LPFC_PHYSICAL_PORT) {
  		memcpy(&phba->wwnn, &vport->fc_nodename, sizeof(phba->wwnn));
  		memcpy(&phba->wwpn, &vport->fc_portname, sizeof(phba->wwnn));
  	}
  
  	lpfc_mbuf_free(phba, mp->virt, mp->phys);
  	kfree(mp);
  	mempool_free(pmb, phba->mbox_mem_pool);
  
  	/* Check if sending the FLOGI is being deferred to after we get
  	 * up to date CSPs from MBX_READ_SPARAM.
  	 */
  	if (phba->hba_flag & HBA_DEFER_FLOGI) {
  		lpfc_initial_flogi(vport);
  		phba->hba_flag &= ~HBA_DEFER_FLOGI;
  	}
  	return;
  
  out:
  	pmb->ctx_buf = NULL;
  	lpfc_mbuf_free(phba, mp->virt, mp->phys);
  	kfree(mp);
  	lpfc_issue_clear_la(phba, vport);
  	mempool_free(pmb, phba->mbox_mem_pool);
  	return;
  }
  
  static void
  lpfc_mbx_process_link_up(struct lpfc_hba *phba, struct lpfc_mbx_read_top *la)
  {
  	struct lpfc_vport *vport = phba->pport;
  	LPFC_MBOXQ_t *sparam_mbox, *cfglink_mbox = NULL;
  	struct Scsi_Host *shost;
  	int i;
  	struct lpfc_dmabuf *mp;
  	int rc;
  	struct fcf_record *fcf_record;
  	uint32_t fc_flags = 0;
  	unsigned long iflags;
  
  	spin_lock_irqsave(&phba->hbalock, iflags);
  	phba->fc_linkspeed = bf_get(lpfc_mbx_read_top_link_spd, la);
  
  	if (!(phba->hba_flag & HBA_FCOE_MODE)) {
  		switch (bf_get(lpfc_mbx_read_top_link_spd, la)) {
  		case LPFC_LINK_SPEED_1GHZ:
  		case LPFC_LINK_SPEED_2GHZ:
  		case LPFC_LINK_SPEED_4GHZ:
  		case LPFC_LINK_SPEED_8GHZ:
  		case LPFC_LINK_SPEED_10GHZ:
  		case LPFC_LINK_SPEED_16GHZ:
  		case LPFC_LINK_SPEED_32GHZ:
  		case LPFC_LINK_SPEED_64GHZ:
  		case LPFC_LINK_SPEED_128GHZ:
  			break;
  		default:
  			phba->fc_linkspeed = LPFC_LINK_SPEED_UNKNOWN;
  			break;
  		}
  	}
  
  	if (phba->fc_topology &&
  	    phba->fc_topology != bf_get(lpfc_mbx_read_top_topology, la)) {
  		lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
  				"3314 Toplogy changed was 0x%x is 0x%x\n",
  				phba->fc_topology,
  				bf_get(lpfc_mbx_read_top_topology, la));
  		phba->fc_topology_changed = 1;
  	}
  
  	phba->fc_topology = bf_get(lpfc_mbx_read_top_topology, la);
  	phba->link_flag &= ~(LS_NPIV_FAB_SUPPORTED | LS_CT_VEN_RPA);
  
  	shost = lpfc_shost_from_vport(vport);
  	if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
  		phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;
  
  		/* if npiv is enabled and this adapter supports npiv log
  		 * a message that npiv is not supported in this topology
  		 */
  		if (phba->cfg_enable_npiv && phba->max_vpi)
  			lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
  				"1309 Link Up Event npiv not supported in loop "
  				"topology\n");
  				/* Get Loop Map information */
  		if (bf_get(lpfc_mbx_read_top_il, la))
  			fc_flags |= FC_LBIT;
  
  		vport->fc_myDID = bf_get(lpfc_mbx_read_top_alpa_granted, la);
  		i = la->lilpBde64.tus.f.bdeSize;
  
  		if (i == 0) {
  			phba->alpa_map[0] = 0;
  		} else {
  			if (vport->cfg_log_verbose & LOG_LINK_EVENT) {
  				int numalpa, j, k;
  				union {
  					uint8_t pamap[16];
  					struct {
  						uint32_t wd1;
  						uint32_t wd2;
  						uint32_t wd3;
  						uint32_t wd4;
  					} pa;
  				} un;
  				numalpa = phba->alpa_map[0];
  				j = 0;
  				while (j < numalpa) {
  					memset(un.pamap, 0, 16);
  					for (k = 1; j < numalpa; k++) {
  						un.pamap[k - 1] =
  							phba->alpa_map[j + 1];
  						j++;
  						if (k == 16)
  							break;
  					}
  					/* Link Up Event ALPA map */
  					lpfc_printf_log(phba,
  							KERN_WARNING,
  							LOG_LINK_EVENT,
  							"1304 Link Up Event "
  							"ALPA map Data: x%x "
  							"x%x x%x x%x\n",
  							un.pa.wd1, un.pa.wd2,
  							un.pa.wd3, un.pa.wd4);
  				}
  			}
  		}
  	} else {
  		if (!(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)) {
  			if (phba->max_vpi && phba->cfg_enable_npiv &&
  			   (phba->sli_rev >= LPFC_SLI_REV3))
  				phba->sli3_options |= LPFC_SLI3_NPIV_ENABLED;
  		}
  		vport->fc_myDID = phba->fc_pref_DID;
  		fc_flags |= FC_LBIT;
  	}
  	spin_unlock_irqrestore(&phba->hbalock, iflags);
  
  	if (fc_flags) {
  		spin_lock_irqsave(shost->host_lock, iflags);
  		vport->fc_flag |= fc_flags;
  		spin_unlock_irqrestore(shost->host_lock, iflags);
  	}
  
  	lpfc_linkup(phba);
  	sparam_mbox = NULL;
  
  	sparam_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  	if (!sparam_mbox)
  		goto out;
  
  	rc = lpfc_read_sparam(phba, sparam_mbox, 0);
  	if (rc) {
  		mempool_free(sparam_mbox, phba->mbox_mem_pool);
  		goto out;
  	}
  	sparam_mbox->vport = vport;
  	sparam_mbox->mbox_cmpl = lpfc_mbx_cmpl_read_sparam;
  	rc = lpfc_sli_issue_mbox(phba, sparam_mbox, MBX_NOWAIT);
  	if (rc == MBX_NOT_FINISHED) {
  		mp = (struct lpfc_dmabuf *)sparam_mbox->ctx_buf;
  		lpfc_mbuf_free(phba, mp->virt, mp->phys);
  		kfree(mp);
  		mempool_free(sparam_mbox, phba->mbox_mem_pool);
  		goto out;
  	}
  
  	if (!(phba->hba_flag & HBA_FCOE_MODE)) {
  		cfglink_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  		if (!cfglink_mbox)
  			goto out;
  		vport->port_state = LPFC_LOCAL_CFG_LINK;
  		lpfc_config_link(phba, cfglink_mbox);
  		cfglink_mbox->vport = vport;
  		cfglink_mbox->mbox_cmpl = lpfc_mbx_cmpl_local_config_link;
  		rc = lpfc_sli_issue_mbox(phba, cfglink_mbox, MBX_NOWAIT);
  		if (rc == MBX_NOT_FINISHED) {
  			mempool_free(cfglink_mbox, phba->mbox_mem_pool);
  			goto out;
  		}
  	} else {
  		vport->port_state = LPFC_VPORT_UNKNOWN;
  		/*
  		 * Add the driver's default FCF record at FCF index 0 now. This
  		 * is phase 1 implementation that support FCF index 0 and driver
  		 * defaults.
  		 */
  		if (!(phba->hba_flag & HBA_FIP_SUPPORT)) {
  			fcf_record = kzalloc(sizeof(struct fcf_record),
  					GFP_KERNEL);
  			if (unlikely(!fcf_record)) {
  				lpfc_printf_log(phba, KERN_ERR,
  					LOG_TRACE_EVENT,
  					"2554 Could not allocate memory for "
  					"fcf record\n");
  				rc = -ENODEV;
  				goto out;
  			}
  
  			lpfc_sli4_build_dflt_fcf_record(phba, fcf_record,
  						LPFC_FCOE_FCF_DEF_INDEX);
  			rc = lpfc_sli4_add_fcf_record(phba, fcf_record);
  			if (unlikely(rc)) {
  				lpfc_printf_log(phba, KERN_ERR,
  					LOG_TRACE_EVENT,
  					"2013 Could not manually add FCF "
  					"record 0, status %d\n", rc);
  				rc = -ENODEV;
  				kfree(fcf_record);
  				goto out;
  			}
  			kfree(fcf_record);
  		}
  		/*
  		 * The driver is expected to do FIP/FCF. Call the port
  		 * and get the FCF Table.
  		 */
  		spin_lock_irqsave(&phba->hbalock, iflags);
  		if (phba->hba_flag & FCF_TS_INPROG) {
  			spin_unlock_irqrestore(&phba->hbalock, iflags);
  			return;
  		}
  		/* This is the initial FCF discovery scan */
  		phba->fcf.fcf_flag |= FCF_INIT_DISC;
  		spin_unlock_irqrestore(&phba->hbalock, iflags);
  		lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
  				"2778 Start FCF table scan at linkup\n");
  		rc = lpfc_sli4_fcf_scan_read_fcf_rec(phba,
  						     LPFC_FCOE_FCF_GET_FIRST);
  		if (rc) {
  			spin_lock_irqsave(&phba->hbalock, iflags);
  			phba->fcf.fcf_flag &= ~FCF_INIT_DISC;
  			spin_unlock_irqrestore(&phba->hbalock, iflags);
  			goto out;
  		}
  		/* Reset FCF roundrobin bmask for new discovery */
  		lpfc_sli4_clear_fcf_rr_bmask(phba);
  	}
  
  	/* Prepare for LINK up registrations */
  	memset(phba->os_host_name, 0, sizeof(phba->os_host_name));
  	scnprintf(phba->os_host_name, sizeof(phba->os_host_name), "%s",
  		  init_utsname()->nodename);
  	return;
  out:
  	lpfc_vport_set_state(vport, FC_VPORT_FAILED);
  	lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  			 "0263 Discovery Mailbox error: state: 0x%x : x%px x%px\n",
  			 vport->port_state, sparam_mbox, cfglink_mbox);
  	lpfc_issue_clear_la(phba, vport);
  	return;
  }
  
  static void
  lpfc_enable_la(struct lpfc_hba *phba)
  {
  	uint32_t control;
  	struct lpfc_sli *psli = &phba->sli;
  	spin_lock_irq(&phba->hbalock);
  	psli->sli_flag |= LPFC_PROCESS_LA;
  	if (phba->sli_rev <= LPFC_SLI_REV3) {
  		control = readl(phba->HCregaddr);
  		control |= HC_LAINT_ENA;
  		writel(control, phba->HCregaddr);
  		readl(phba->HCregaddr); /* flush */
  	}
  	spin_unlock_irq(&phba->hbalock);
  }
  
  static void
  lpfc_mbx_issue_link_down(struct lpfc_hba *phba)
  {
  	lpfc_linkdown(phba);
  	lpfc_enable_la(phba);
  	lpfc_unregister_unused_fcf(phba);
  	/* turn on Link Attention interrupts - no CLEAR_LA needed */
  }
  
  
  /*
   * This routine handles processing a READ_TOPOLOGY mailbox
   * command upon completion. It is setup in the LPFC_MBOXQ
   * as the completion routine when the command is
   * handed off to the SLI layer. SLI4 only.
   */
  void
  lpfc_mbx_cmpl_read_topology(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
  {
  	struct lpfc_vport *vport = pmb->vport;
  	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_mbx_read_top *la;
  	struct lpfc_sli_ring *pring;
  	MAILBOX_t *mb = &pmb->u.mb;
  	struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *)(pmb->ctx_buf);
  	uint8_t attn_type;
  	unsigned long iflags;
  
  	/* Unblock ELS traffic */
  	pring = lpfc_phba_elsring(phba);
  	if (pring)
  		pring->flag &= ~LPFC_STOP_IOCB_EVENT;
  
  	/* Check for error */
  	if (mb->mbxStatus) {
  		lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
  				"1307 READ_LA mbox error x%x state x%x\n",
  				mb->mbxStatus, vport->port_state);
  		lpfc_mbx_issue_link_down(phba);
  		phba->link_state = LPFC_HBA_ERROR;
  		goto lpfc_mbx_cmpl_read_topology_free_mbuf;
  	}
  
  	la = (struct lpfc_mbx_read_top *) &pmb->u.mb.un.varReadTop;
  	attn_type = bf_get(lpfc_mbx_read_top_att_type, la);
  
  	memcpy(&phba->alpa_map[0], mp->virt, 128);
  
  	spin_lock_irqsave(shost->host_lock, iflags);
  	if (bf_get(lpfc_mbx_read_top_pb, la))
  		vport->fc_flag |= FC_BYPASSED_MODE;
  	else
  		vport->fc_flag &= ~FC_BYPASSED_MODE;
  	spin_unlock_irqrestore(shost->host_lock, iflags);
  
  	if (phba->fc_eventTag <= la->eventTag) {
  		phba->fc_stat.LinkMultiEvent++;
  		if (attn_type == LPFC_ATT_LINK_UP)
  			if (phba->fc_eventTag != 0)
  				lpfc_linkdown(phba);
  	}
  
  	phba->fc_eventTag = la->eventTag;
  	if (phba->sli_rev < LPFC_SLI_REV4) {
  		spin_lock_irqsave(&phba->hbalock, iflags);
  		if (bf_get(lpfc_mbx_read_top_mm, la))
  			phba->sli.sli_flag |= LPFC_MENLO_MAINT;
  		else
  			phba->sli.sli_flag &= ~LPFC_MENLO_MAINT;
  		spin_unlock_irqrestore(&phba->hbalock, iflags);
  	}
  
  	phba->link_events++;
  	if ((attn_type == LPFC_ATT_LINK_UP) &&
  	    !(phba->sli.sli_flag & LPFC_MENLO_MAINT)) {
  		phba->fc_stat.LinkUp++;
  		if (phba->link_flag & LS_LOOPBACK_MODE) {
  			lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
  					"1306 Link Up Event in loop back mode "
  					"x%x received Data: x%x x%x x%x x%x\n",
  					la->eventTag, phba->fc_eventTag,
  					bf_get(lpfc_mbx_read_top_alpa_granted,
  					       la),
  					bf_get(lpfc_mbx_read_top_link_spd, la),
  					phba->alpa_map[0]);
  		} else {
  			lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
  					"1303 Link Up Event x%x received "
  					"Data: x%x x%x x%x x%x x%x x%x %d\n",
  					la->eventTag, phba->fc_eventTag,
  					bf_get(lpfc_mbx_read_top_alpa_granted,
  					       la),
  					bf_get(lpfc_mbx_read_top_link_spd, la),
  					phba->alpa_map[0],
  					bf_get(lpfc_mbx_read_top_mm, la),
  					bf_get(lpfc_mbx_read_top_fa, la),
  					phba->wait_4_mlo_maint_flg);
  		}
  		lpfc_mbx_process_link_up(phba, la);
  	} else if (attn_type == LPFC_ATT_LINK_DOWN ||
  		   attn_type == LPFC_ATT_UNEXP_WWPN) {
  		phba->fc_stat.LinkDown++;
  		if (phba->link_flag & LS_LOOPBACK_MODE)
  			lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
  				"1308 Link Down Event in loop back mode "
  				"x%x received "
  				"Data: x%x x%x x%x\n",
  				la->eventTag, phba->fc_eventTag,
  				phba->pport->port_state, vport->fc_flag);
  		else if (attn_type == LPFC_ATT_UNEXP_WWPN)
  			lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
  				"1313 Link Down Unexpected FA WWPN Event x%x "
  				"received Data: x%x x%x x%x x%x x%x\n",
  				la->eventTag, phba->fc_eventTag,
  				phba->pport->port_state, vport->fc_flag,
  				bf_get(lpfc_mbx_read_top_mm, la),
  				bf_get(lpfc_mbx_read_top_fa, la));
  		else
  			lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
  				"1305 Link Down Event x%x received "
  				"Data: x%x x%x x%x x%x x%x\n",
  				la->eventTag, phba->fc_eventTag,
  				phba->pport->port_state, vport->fc_flag,
  				bf_get(lpfc_mbx_read_top_mm, la),
  				bf_get(lpfc_mbx_read_top_fa, la));
  		lpfc_mbx_issue_link_down(phba);
  	}
  	if (phba->sli.sli_flag & LPFC_MENLO_MAINT &&
  	    attn_type == LPFC_ATT_LINK_UP) {
  		if (phba->link_state != LPFC_LINK_DOWN) {
  			phba->fc_stat.LinkDown++;
  			lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
  				"1312 Link Down Event x%x received "
  				"Data: x%x x%x x%x\n",
  				la->eventTag, phba->fc_eventTag,
  				phba->pport->port_state, vport->fc_flag);
  			lpfc_mbx_issue_link_down(phba);
  		} else
  			lpfc_enable_la(phba);
  
  		lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
  				"1310 Menlo Maint Mode Link up Event x%x rcvd "
  				"Data: x%x x%x x%x\n",
  				la->eventTag, phba->fc_eventTag,
  				phba->pport->port_state, vport->fc_flag);
  		/*
  		 * The cmnd that triggered this will be waiting for this
  		 * signal.
  		 */
  		/* WAKEUP for MENLO_SET_MODE or MENLO_RESET command. */
  		if (phba->wait_4_mlo_maint_flg) {
  			phba->wait_4_mlo_maint_flg = 0;
  			wake_up_interruptible(&phba->wait_4_mlo_m_q);
  		}
  	}
  
  	if ((phba->sli_rev < LPFC_SLI_REV4) &&
  	    bf_get(lpfc_mbx_read_top_fa, la)) {
  		if (phba->sli.sli_flag & LPFC_MENLO_MAINT)
  			lpfc_issue_clear_la(phba, vport);
  		lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
  				"1311 fa %d\n",
  				bf_get(lpfc_mbx_read_top_fa, la));
  	}
  
  lpfc_mbx_cmpl_read_topology_free_mbuf:
  	lpfc_mbuf_free(phba, mp->virt, mp->phys);
  	kfree(mp);
  	mempool_free(pmb, phba->mbox_mem_pool);
  	return;
  }
  
  /*
   * This routine handles processing a REG_LOGIN mailbox
   * command upon completion. It is setup in the LPFC_MBOXQ
   * as the completion routine when the command is
   * handed off to the SLI layer.
   */
  void
  lpfc_mbx_cmpl_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
  {
  	struct lpfc_vport  *vport = pmb->vport;
  	struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *)(pmb->ctx_buf);
  	struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *)pmb->ctx_ndlp;
  
  	pmb->ctx_buf = NULL;
  	pmb->ctx_ndlp = NULL;
  
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_SLI | LOG_NODE | LOG_DISCOVERY,
  			 "0002 rpi:%x DID:%x flg:%x %d x%px\n",
  			 ndlp->nlp_rpi, ndlp->nlp_DID, ndlp->nlp_flag,
  			 kref_read(&ndlp->kref),
  			 ndlp);
  	if (ndlp->nlp_flag & NLP_REG_LOGIN_SEND)
  		ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
  
  	if (ndlp->nlp_flag & NLP_IGNR_REG_CMPL ||
  	    ndlp->nlp_state != NLP_STE_REG_LOGIN_ISSUE) {
  		/* We rcvd a rscn after issuing this
  		 * mbox reg login, we may have cycled
  		 * back through the state and be
  		 * back at reg login state so this
  		 * mbox needs to be ignored becase
  		 * there is another reg login in
  		 * process.
  		 */
  		spin_lock_irq(&ndlp->lock);
  		ndlp->nlp_flag &= ~NLP_IGNR_REG_CMPL;
  		spin_unlock_irq(&ndlp->lock);
  
  		/*
  		 * We cannot leave the RPI registered because
  		 * if we go thru discovery again for this ndlp
  		 * a subsequent REG_RPI will fail.
  		 */
  		ndlp->nlp_flag |= NLP_RPI_REGISTERED;
  		lpfc_unreg_rpi(vport, ndlp);
  	}
  
  	/* Call state machine */
  	lpfc_disc_state_machine(vport, ndlp, pmb, NLP_EVT_CMPL_REG_LOGIN);
  
  	lpfc_mbuf_free(phba, mp->virt, mp->phys);
  	kfree(mp);
  	mempool_free(pmb, phba->mbox_mem_pool);
  	/* decrement the node reference count held for this callback
  	 * function.
  	 */
  	lpfc_nlp_put(ndlp);
  
  	return;
  }
  
  static void
  lpfc_mbx_cmpl_unreg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
  {
  	MAILBOX_t *mb = &pmb->u.mb;
  	struct lpfc_vport *vport = pmb->vport;
  	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
  
  	switch (mb->mbxStatus) {
  	case 0x0011:
  	case 0x0020:
  		lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
  				 "0911 cmpl_unreg_vpi, mb status = 0x%x\n",
  				 mb->mbxStatus);
  		break;
  	/* If VPI is busy, reset the HBA */
  	case 0x9700:
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  			"2798 Unreg_vpi failed vpi 0x%x, mb status = 0x%x\n",
  			vport->vpi, mb->mbxStatus);
  		if (!(phba->pport->load_flag & FC_UNLOADING))
  			lpfc_workq_post_event(phba, NULL, NULL,
  				LPFC_EVT_RESET_HBA);
  	}
  	spin_lock_irq(shost->host_lock);
  	vport->vpi_state &= ~LPFC_VPI_REGISTERED;
  	vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
  	spin_unlock_irq(shost->host_lock);
  	vport->unreg_vpi_cmpl = VPORT_OK;
  	mempool_free(pmb, phba->mbox_mem_pool);
  	lpfc_cleanup_vports_rrqs(vport, NULL);
  	/*
  	 * This shost reference might have been taken at the beginning of
  	 * lpfc_vport_delete()
  	 */
  	if ((vport->load_flag & FC_UNLOADING) && (vport != phba->pport))
  		scsi_host_put(shost);
  }
  
  int
  lpfc_mbx_unreg_vpi(struct lpfc_vport *vport)
  {
  	struct lpfc_hba  *phba = vport->phba;
  	LPFC_MBOXQ_t *mbox;
  	int rc;
  
  	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  	if (!mbox)
  		return 1;
  
  	lpfc_unreg_vpi(phba, vport->vpi, mbox);
  	mbox->vport = vport;
  	mbox->mbox_cmpl = lpfc_mbx_cmpl_unreg_vpi;
  	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
  	if (rc == MBX_NOT_FINISHED) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "1800 Could not issue unreg_vpi\n");
  		mempool_free(mbox, phba->mbox_mem_pool);
  		vport->unreg_vpi_cmpl = VPORT_ERROR;
  		return rc;
  	}
  	return 0;
  }
  
  static void
  lpfc_mbx_cmpl_reg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
  {
  	struct lpfc_vport *vport = pmb->vport;
  	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
  	MAILBOX_t *mb = &pmb->u.mb;
  
  	switch (mb->mbxStatus) {
  	case 0x0011:
  	case 0x9601:
  	case 0x9602:
  		lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
  				 "0912 cmpl_reg_vpi, mb status = 0x%x\n",
  				 mb->mbxStatus);
  		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
  		spin_lock_irq(shost->host_lock);
  		vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
  		spin_unlock_irq(shost->host_lock);
  		vport->fc_myDID = 0;
  
  		if ((vport->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
  		    (vport->cfg_enable_fc4_type == LPFC_ENABLE_NVME)) {
  			if (phba->nvmet_support)
  				lpfc_nvmet_update_targetport(phba);
  			else
  				lpfc_nvme_update_localport(vport);
  		}
  		goto out;
  	}
  
  	spin_lock_irq(shost->host_lock);
  	vport->vpi_state |= LPFC_VPI_REGISTERED;
  	vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
  	spin_unlock_irq(shost->host_lock);
  	vport->num_disc_nodes = 0;
  	/* go thru NPR list and issue ELS PLOGIs */
  	if (vport->fc_npr_cnt)
  		lpfc_els_disc_plogi(vport);
  
  	if (!vport->num_disc_nodes) {
  		spin_lock_irq(shost->host_lock);
  		vport->fc_flag &= ~FC_NDISC_ACTIVE;
  		spin_unlock_irq(shost->host_lock);
  		lpfc_can_disctmo(vport);
  	}
  	vport->port_state = LPFC_VPORT_READY;
  
  out:
  	mempool_free(pmb, phba->mbox_mem_pool);
  	return;
  }
  
  /**
   * lpfc_create_static_vport - Read HBA config region to create static vports.
   * @phba: pointer to lpfc hba data structure.
   *
   * This routine issue a DUMP mailbox command for config region 22 to get
   * the list of static vports to be created. The function create vports
   * based on the information returned from the HBA.
   **/
  void
  lpfc_create_static_vport(struct lpfc_hba *phba)
  {
  	LPFC_MBOXQ_t *pmb = NULL;
  	MAILBOX_t *mb;
  	struct static_vport_info *vport_info;
  	int mbx_wait_rc = 0, i;
  	struct fc_vport_identifiers vport_id;
  	struct fc_vport *new_fc_vport;
  	struct Scsi_Host *shost;
  	struct lpfc_vport *vport;
  	uint16_t offset = 0;
  	uint8_t *vport_buff;
  	struct lpfc_dmabuf *mp;
  	uint32_t byte_count = 0;
  
  	pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  	if (!pmb) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"0542 lpfc_create_static_vport failed to"
  				" allocate mailbox memory\n");
  		return;
  	}
  	memset(pmb, 0, sizeof(LPFC_MBOXQ_t));
  	mb = &pmb->u.mb;
  
  	vport_info = kzalloc(sizeof(struct static_vport_info), GFP_KERNEL);
  	if (!vport_info) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"0543 lpfc_create_static_vport failed to"
  				" allocate vport_info\n");
  		mempool_free(pmb, phba->mbox_mem_pool);
  		return;
  	}
  
  	vport_buff = (uint8_t *) vport_info;
  	do {
  		/* free dma buffer from previous round */
  		if (pmb->ctx_buf) {
  			mp = (struct lpfc_dmabuf *)pmb->ctx_buf;
  			lpfc_mbuf_free(phba, mp->virt, mp->phys);
  			kfree(mp);
  		}
  		if (lpfc_dump_static_vport(phba, pmb, offset))
  			goto out;
  
  		pmb->vport = phba->pport;
  		mbx_wait_rc = lpfc_sli_issue_mbox_wait(phba, pmb,
  							LPFC_MBOX_TMO);
  
  		if ((mbx_wait_rc != MBX_SUCCESS) || mb->mbxStatus) {
  			lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
  				"0544 lpfc_create_static_vport failed to"
  				" issue dump mailbox command ret 0x%x "
  				"status 0x%x\n",
  				mbx_wait_rc, mb->mbxStatus);
  			goto out;
  		}
  
  		if (phba->sli_rev == LPFC_SLI_REV4) {
  			byte_count = pmb->u.mqe.un.mb_words[5];
  			mp = (struct lpfc_dmabuf *)pmb->ctx_buf;
  			if (byte_count > sizeof(struct static_vport_info) -
  					offset)
  				byte_count = sizeof(struct static_vport_info)
  					- offset;
  			memcpy(vport_buff + offset, mp->virt, byte_count);
  			offset += byte_count;
  		} else {
  			if (mb->un.varDmp.word_cnt >
  				sizeof(struct static_vport_info) - offset)
  				mb->un.varDmp.word_cnt =
  					sizeof(struct static_vport_info)
  						- offset;
  			byte_count = mb->un.varDmp.word_cnt;
  			lpfc_sli_pcimem_bcopy(((uint8_t *)mb) + DMP_RSP_OFFSET,
  				vport_buff + offset,
  				byte_count);
  
  			offset += byte_count;
  		}
  
  	} while (byte_count &&
  		offset < sizeof(struct static_vport_info));
  
  
  	if ((le32_to_cpu(vport_info->signature) != VPORT_INFO_SIG) ||
  		((le32_to_cpu(vport_info->rev) & VPORT_INFO_REV_MASK)
  			!= VPORT_INFO_REV)) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"0545 lpfc_create_static_vport bad"
  				" information header 0x%x 0x%x\n",
  				le32_to_cpu(vport_info->signature),
  				le32_to_cpu(vport_info->rev) &
  				VPORT_INFO_REV_MASK);
  
  		goto out;
  	}
  
  	shost = lpfc_shost_from_vport(phba->pport);
  
  	for (i = 0; i < MAX_STATIC_VPORT_COUNT; i++) {
  		memset(&vport_id, 0, sizeof(vport_id));
  		vport_id.port_name = wwn_to_u64(vport_info->vport_list[i].wwpn);
  		vport_id.node_name = wwn_to_u64(vport_info->vport_list[i].wwnn);
  		if (!vport_id.port_name || !vport_id.node_name)
  			continue;
  
  		vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
  		vport_id.vport_type = FC_PORTTYPE_NPIV;
  		vport_id.disable = false;
  		new_fc_vport = fc_vport_create(shost, 0, &vport_id);
  
  		if (!new_fc_vport) {
  			lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
  				"0546 lpfc_create_static_vport failed to"
  				" create vport\n");
  			continue;
  		}
  
  		vport = *(struct lpfc_vport **)new_fc_vport->dd_data;
  		vport->vport_flag |= STATIC_VPORT;
  	}
  
  out:
  	kfree(vport_info);
  	if (mbx_wait_rc != MBX_TIMEOUT) {
  		if (pmb->ctx_buf) {
  			mp = (struct lpfc_dmabuf *)pmb->ctx_buf;
  			lpfc_mbuf_free(phba, mp->virt, mp->phys);
  			kfree(mp);
  		}
  		mempool_free(pmb, phba->mbox_mem_pool);
  	}
  
  	return;
  }
  
  /*
   * This routine handles processing a Fabric REG_LOGIN mailbox
   * command upon completion. It is setup in the LPFC_MBOXQ
   * as the completion routine when the command is
   * handed off to the SLI layer.
   */
  void
  lpfc_mbx_cmpl_fabric_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
  {
  	struct lpfc_vport *vport = pmb->vport;
  	MAILBOX_t *mb = &pmb->u.mb;
  	struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *)(pmb->ctx_buf);
  	struct lpfc_nodelist *ndlp;
  	struct Scsi_Host *shost;
  
  	ndlp = (struct lpfc_nodelist *)pmb->ctx_ndlp;
  	pmb->ctx_ndlp = NULL;
  	pmb->ctx_buf = NULL;
  
  	if (mb->mbxStatus) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "0258 Register Fabric login error: 0x%x\n",
  				 mb->mbxStatus);
  		lpfc_mbuf_free(phba, mp->virt, mp->phys);
  		kfree(mp);
  		mempool_free(pmb, phba->mbox_mem_pool);
  
  		if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
  			/* FLOGI failed, use loop map to make discovery list */
  			lpfc_disc_list_loopmap(vport);
  
  			/* Start discovery */
  			lpfc_disc_start(vport);
  			/* Decrement the reference count to ndlp after the
  			 * reference to the ndlp are done.
  			 */
  			lpfc_nlp_put(ndlp);
  			return;
  		}
  
  		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
  		/* Decrement the reference count to ndlp after the reference
  		 * to the ndlp are done.
  		 */
  		lpfc_nlp_put(ndlp);
  		return;
  	}
  
  	if (phba->sli_rev < LPFC_SLI_REV4)
  		ndlp->nlp_rpi = mb->un.varWords[0];
  	ndlp->nlp_flag |= NLP_RPI_REGISTERED;
  	ndlp->nlp_type |= NLP_FABRIC;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
  
  	if (vport->port_state == LPFC_FABRIC_CFG_LINK) {
  		/* when physical port receive logo donot start
  		 * vport discovery */
  		if (!(vport->fc_flag & FC_LOGO_RCVD_DID_CHNG))
  			lpfc_start_fdiscs(phba);
  		else {
  			shost = lpfc_shost_from_vport(vport);
  			spin_lock_irq(shost->host_lock);
  			vport->fc_flag &= ~FC_LOGO_RCVD_DID_CHNG ;
  			spin_unlock_irq(shost->host_lock);
  		}
  		lpfc_do_scr_ns_plogi(phba, vport);
  	}
  
  	lpfc_mbuf_free(phba, mp->virt, mp->phys);
  	kfree(mp);
  	mempool_free(pmb, phba->mbox_mem_pool);
  
  	/* Drop the reference count from the mbox at the end after
  	 * all the current reference to the ndlp have been done.
  	 */
  	lpfc_nlp_put(ndlp);
  	return;
  }
  
   /*
    * This routine will issue a GID_FT for each FC4 Type supported
    * by the driver. ALL GID_FTs must complete before discovery is started.
    */
  int
  lpfc_issue_gidft(struct lpfc_vport *vport)
  {
  	/* Good status, issue CT Request to NameServer */
  	if ((vport->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
  	    (vport->cfg_enable_fc4_type == LPFC_ENABLE_FCP)) {
  		if (lpfc_ns_cmd(vport, SLI_CTNS_GID_FT, 0, SLI_CTPT_FCP)) {
  			/* Cannot issue NameServer FCP Query, so finish up
  			 * discovery
  			 */
  			lpfc_printf_vlog(vport, KERN_ERR,
  					 LOG_TRACE_EVENT,
  					 "0604 %s FC TYPE %x %s\n",
  					 "Failed to issue GID_FT to ",
  					 FC_TYPE_FCP,
  					 "Finishing discovery.");
  			return 0;
  		}
  		vport->gidft_inp++;
  	}
  
  	if ((vport->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
  	    (vport->cfg_enable_fc4_type == LPFC_ENABLE_NVME)) {
  		if (lpfc_ns_cmd(vport, SLI_CTNS_GID_FT, 0, SLI_CTPT_NVME)) {
  			/* Cannot issue NameServer NVME Query, so finish up
  			 * discovery
  			 */
  			lpfc_printf_vlog(vport, KERN_ERR,
  					 LOG_TRACE_EVENT,
  					 "0605 %s FC_TYPE %x %s %d\n",
  					 "Failed to issue GID_FT to ",
  					 FC_TYPE_NVME,
  					 "Finishing discovery: gidftinp ",
  					 vport->gidft_inp);
  			if (vport->gidft_inp == 0)
  				return 0;
  		} else
  			vport->gidft_inp++;
  	}
  	return vport->gidft_inp;
  }
  
  /**
   * lpfc_issue_gidpt - issue a GID_PT for all N_Ports
   * @vport: The virtual port for which this call is being executed.
   *
   * This routine will issue a GID_PT to get a list of all N_Ports
   *
   * Return value :
   *   0 - Failure to issue a GID_PT
   *   1 - GID_PT issued
   **/
  int
  lpfc_issue_gidpt(struct lpfc_vport *vport)
  {
  	/* Good status, issue CT Request to NameServer */
  	if (lpfc_ns_cmd(vport, SLI_CTNS_GID_PT, 0, GID_PT_N_PORT)) {
  		/* Cannot issue NameServer FCP Query, so finish up
  		 * discovery
  		 */
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "0606 %s Port TYPE %x %s\n",
  				 "Failed to issue GID_PT to ",
  				 GID_PT_N_PORT,
  				 "Finishing discovery.");
  		return 0;
  	}
  	vport->gidft_inp++;
  	return 1;
  }
  
  /*
   * This routine handles processing a NameServer REG_LOGIN mailbox
   * command upon completion. It is setup in the LPFC_MBOXQ
   * as the completion routine when the command is
   * handed off to the SLI layer.
   */
  void
  lpfc_mbx_cmpl_ns_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
  {
  	MAILBOX_t *mb = &pmb->u.mb;
  	struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *)(pmb->ctx_buf);
  	struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *)pmb->ctx_ndlp;
  	struct lpfc_vport *vport = pmb->vport;
  
  	pmb->ctx_buf = NULL;
  	pmb->ctx_ndlp = NULL;
  	vport->gidft_inp = 0;
  
  	if (mb->mbxStatus) {
  		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				 "0260 Register NameServer error: 0x%x\n",
  				 mb->mbxStatus);
  
  out:
  		/* decrement the node reference count held for this
  		 * callback function.
  		 */
  		lpfc_nlp_put(ndlp);
  		lpfc_mbuf_free(phba, mp->virt, mp->phys);
  		kfree(mp);
  		mempool_free(pmb, phba->mbox_mem_pool);
  
  		/* If the node is not registered with the scsi or nvme
  		 * transport, remove the fabric node.  The failed reg_login
  		 * is terminal.
  		 */
  		if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
  			spin_lock_irq(&ndlp->lock);
  			ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
  			spin_unlock_irq(&ndlp->lock);
  			lpfc_nlp_not_used(ndlp);
  		}
  
  		if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
  			/*
  			 * RegLogin failed, use loop map to make discovery
  			 * list
  			 */
  			lpfc_disc_list_loopmap(vport);
  
  			/* Start discovery */
  			lpfc_disc_start(vport);
  			return;
  		}
  		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
  		return;
  	}
  
  	if (phba->sli_rev < LPFC_SLI_REV4)
  		ndlp->nlp_rpi = mb->un.varWords[0];
  	ndlp->nlp_flag |= NLP_RPI_REGISTERED;
  	ndlp->nlp_type |= NLP_FABRIC;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_DISCOVERY,
  			 "0003 rpi:%x DID:%x flg:%x %d x%px\n",
  			 ndlp->nlp_rpi, ndlp->nlp_DID, ndlp->nlp_flag,
  			 kref_read(&ndlp->kref),
  			 ndlp);
  
  	if (vport->port_state < LPFC_VPORT_READY) {
  		/* Link up discovery requires Fabric registration. */
  		lpfc_ns_cmd(vport, SLI_CTNS_RNN_ID, 0, 0);
  		lpfc_ns_cmd(vport, SLI_CTNS_RSNN_NN, 0, 0);
  		lpfc_ns_cmd(vport, SLI_CTNS_RSPN_ID, 0, 0);
  		lpfc_ns_cmd(vport, SLI_CTNS_RFT_ID, 0, 0);
  
  		if ((vport->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
  		    (vport->cfg_enable_fc4_type == LPFC_ENABLE_FCP))
  			lpfc_ns_cmd(vport, SLI_CTNS_RFF_ID, 0, FC_TYPE_FCP);
  
  		if ((vport->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
  		    (vport->cfg_enable_fc4_type == LPFC_ENABLE_NVME))
  			lpfc_ns_cmd(vport, SLI_CTNS_RFF_ID, 0,
  				    FC_TYPE_NVME);
  
  		/* Issue SCR just before NameServer GID_FT Query */
  		lpfc_issue_els_scr(vport, 0);
  
  		if (!phba->cfg_enable_mi ||
  		    phba->sli4_hba.pc_sli4_params.mi_ver < LPFC_MIB3_SUPPORT)
  			lpfc_issue_els_rdf(vport, 0);
  	}
  
  	vport->fc_ns_retry = 0;
  	if (lpfc_issue_gidft(vport) == 0)
  		goto out;
  
  	/*
  	 * At this point in time we may need to wait for multiple
  	 * SLI_CTNS_GID_FT CT commands to complete before we start discovery.
  	 *
  	 * decrement the node reference count held for this
  	 * callback function.
  	 */
  	lpfc_nlp_put(ndlp);
  	lpfc_mbuf_free(phba, mp->virt, mp->phys);
  	kfree(mp);
  	mempool_free(pmb, phba->mbox_mem_pool);
  
  	return;
  }
  
  static void
  lpfc_register_remote_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct fc_rport  *rport;
  	struct lpfc_rport_data *rdata;
  	struct fc_rport_identifiers rport_ids;
  	struct lpfc_hba  *phba = vport->phba;
  	unsigned long flags;
  
  	if (vport->cfg_enable_fc4_type == LPFC_ENABLE_NVME)
  		return;
  
  	/* Remote port has reappeared. Re-register w/ FC transport */
  	rport_ids.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
  	rport_ids.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
  	rport_ids.port_id = ndlp->nlp_DID;
  	rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
  
  
  	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
  			      "rport add:       did:x%x flg:x%x type x%x",
  			      ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
  
  	/* Don't add the remote port if unloading. */
  	if (vport->load_flag & FC_UNLOADING)
  		return;
  
  	/*
  	 * Disassociate any older association between this ndlp and rport
  	 */
  	if (ndlp->rport) {
  		rdata = ndlp->rport->dd_data;
  		rdata->pnode = NULL;
  	}
  
  	ndlp->rport = rport = fc_remote_port_add(shost, 0, &rport_ids);
  	if (!rport) {
  		dev_printk(KERN_WARNING, &phba->pcidev->dev,
  			   "Warning: fc_remote_port_add failed\n");
  		return;
  	}
  
  	/* Successful port add.  Complete initializing node data */
  	rport->maxframe_size = ndlp->nlp_maxframe;
  	rport->supported_classes = ndlp->nlp_class_sup;
  	rdata = rport->dd_data;
  	rdata->pnode = lpfc_nlp_get(ndlp);
  	if (!rdata->pnode) {
  		dev_warn(&phba->pcidev->dev,
  			 "Warning - node ref failed. Unreg rport\n");
  		fc_remote_port_delete(rport);
  		ndlp->rport = NULL;
  		return;
  	}
  
  	spin_lock_irqsave(&ndlp->lock, flags);
  	ndlp->fc4_xpt_flags |= SCSI_XPT_REGD;
  	spin_unlock_irqrestore(&ndlp->lock, flags);
  
  	if (ndlp->nlp_type & NLP_FCP_TARGET)
  		rport_ids.roles |= FC_PORT_ROLE_FCP_TARGET;
  	if (ndlp->nlp_type & NLP_FCP_INITIATOR)
  		rport_ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
  	if (ndlp->nlp_type & NLP_NVME_INITIATOR)
  		rport_ids.roles |= FC_PORT_ROLE_NVME_INITIATOR;
  	if (ndlp->nlp_type & NLP_NVME_TARGET)
  		rport_ids.roles |= FC_PORT_ROLE_NVME_TARGET;
  	if (ndlp->nlp_type & NLP_NVME_DISCOVERY)
  		rport_ids.roles |= FC_PORT_ROLE_NVME_DISCOVERY;
  
  	if (rport_ids.roles !=  FC_RPORT_ROLE_UNKNOWN)
  		fc_remote_port_rolechg(rport, rport_ids.roles);
  
  	lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
  			 "3183 %s rport x%px DID x%x, role x%x\n",
  			 __func__, rport, rport->port_id, rport->roles);
  
  	if ((rport->scsi_target_id != -1) &&
  	    (rport->scsi_target_id < LPFC_MAX_TARGET)) {
  		ndlp->nlp_sid = rport->scsi_target_id;
  	}
  
  	return;
  }
  
  static void
  lpfc_unregister_remote_port(struct lpfc_nodelist *ndlp)
  {
  	struct fc_rport *rport = ndlp->rport;
  	struct lpfc_vport *vport = ndlp->vport;
  
  	if (vport->cfg_enable_fc4_type == LPFC_ENABLE_NVME)
  		return;
  
  	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
  		"rport delete:    did:x%x flg:x%x type x%x",
  		ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
  
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
  			 "3184 rport unregister x%06x, rport x%px "
  			 "xptflg x%x\n",
  			 ndlp->nlp_DID, rport, ndlp->fc4_xpt_flags);
  
  	fc_remote_port_delete(rport);
  	lpfc_nlp_put(ndlp);
  }
  
  static void
  lpfc_nlp_counters(struct lpfc_vport *vport, int state, int count)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	unsigned long iflags;
  
  	spin_lock_irqsave(shost->host_lock, iflags);
  	switch (state) {
  	case NLP_STE_UNUSED_NODE:
  		vport->fc_unused_cnt += count;
  		break;
  	case NLP_STE_PLOGI_ISSUE:
  		vport->fc_plogi_cnt += count;
  		break;
  	case NLP_STE_ADISC_ISSUE:
  		vport->fc_adisc_cnt += count;
  		break;
  	case NLP_STE_REG_LOGIN_ISSUE:
  		vport->fc_reglogin_cnt += count;
  		break;
  	case NLP_STE_PRLI_ISSUE:
  		vport->fc_prli_cnt += count;
  		break;
  	case NLP_STE_UNMAPPED_NODE:
  		vport->fc_unmap_cnt += count;
  		break;
  	case NLP_STE_MAPPED_NODE:
  		vport->fc_map_cnt += count;
  		break;
  	case NLP_STE_NPR_NODE:
  		if (vport->fc_npr_cnt == 0 && count == -1)
  			vport->fc_npr_cnt = 0;
  		else
  			vport->fc_npr_cnt += count;
  		break;
  	}
  	spin_unlock_irqrestore(shost->host_lock, iflags);
  }
  
  static void
  lpfc_nlp_state_cleanup(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  		       int old_state, int new_state)
  {
  	if (new_state == NLP_STE_UNMAPPED_NODE) {
  		ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
  		ndlp->nlp_type |= NLP_FC_NODE;
  	}
  	if (new_state == NLP_STE_MAPPED_NODE)
  		ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
  	if (new_state == NLP_STE_NPR_NODE)
  		ndlp->nlp_flag &= ~NLP_RCV_PLOGI;
  
  	/* FCP and NVME Transport interface */
  	if ((old_state == NLP_STE_MAPPED_NODE ||
  	     old_state == NLP_STE_UNMAPPED_NODE)) {
  		if (ndlp->rport &&
  		    lpfc_valid_xpt_node(ndlp)) {
  			vport->phba->nport_event_cnt++;
  			lpfc_unregister_remote_port(ndlp);
  		}
  
  		if (ndlp->nlp_fc4_type & NLP_FC4_NVME) {
  			vport->phba->nport_event_cnt++;
  			if (vport->phba->nvmet_support == 0) {
  				/* Start devloss if target. */
  				if (ndlp->nlp_type & NLP_NVME_TARGET)
  					lpfc_nvme_unregister_port(vport, ndlp);
  			} else {
  				/* NVMET has no upcall. */
  				lpfc_nlp_put(ndlp);
  			}
  		}
  	}
  
  	/* FCP and NVME Transport interfaces */
  
  	if (new_state ==  NLP_STE_MAPPED_NODE ||
  	    new_state == NLP_STE_UNMAPPED_NODE) {
  		if (lpfc_valid_xpt_node(ndlp)) {
  			vport->phba->nport_event_cnt++;
  			/*
  			 * Tell the fc transport about the port, if we haven't
  			 * already. If we have, and it's a scsi entity, be
  			 */
  			lpfc_register_remote_port(vport, ndlp);
  		}
  		/* Notify the NVME transport of this new rport. */
  		if (vport->phba->sli_rev >= LPFC_SLI_REV4 &&
  		    ndlp->nlp_fc4_type & NLP_FC4_NVME) {
  			if (vport->phba->nvmet_support == 0) {
  				/* Register this rport with the transport.
  				 * Only NVME Target Rports are registered with
  				 * the transport.
  				 */
  				if (ndlp->nlp_type & NLP_NVME_TARGET) {
  					vport->phba->nport_event_cnt++;
  					lpfc_nvme_register_port(vport, ndlp);
  				}
  			} else {
  				/* Just take an NDLP ref count since the
  				 * target does not register rports.
  				 */
  				lpfc_nlp_get(ndlp);
  			}
  		}
  	}
  
  	if ((new_state ==  NLP_STE_MAPPED_NODE) &&
  		(vport->stat_data_enabled)) {
  		/*
  		 * A new target is discovered, if there is no buffer for
  		 * statistical data collection allocate buffer.
  		 */
  		ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
  					 sizeof(struct lpfc_scsicmd_bkt),
  					 GFP_KERNEL);
  
  		if (!ndlp->lat_data)
  			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  				"0286 lpfc_nlp_state_cleanup failed to "
  				"allocate statistical data buffer DID "
  				"0x%x\n", ndlp->nlp_DID);
  	}
  	/*
  	 * If the node just added to Mapped list was an FCP target,
  	 * but the remote port registration failed or assigned a target
  	 * id outside the presentable range - move the node to the
  	 * Unmapped List.
  	 */
  	if ((new_state == NLP_STE_MAPPED_NODE) &&
  	    (ndlp->nlp_type & NLP_FCP_TARGET) &&
  	    (!ndlp->rport ||
  	     ndlp->rport->scsi_target_id == -1 ||
  	     ndlp->rport->scsi_target_id >= LPFC_MAX_TARGET)) {
  		spin_lock_irq(&ndlp->lock);
  		ndlp->nlp_flag |= NLP_TGT_NO_SCSIID;
  		spin_unlock_irq(&ndlp->lock);
  		lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
  	}
  }
  
  static char *
  lpfc_nlp_state_name(char *buffer, size_t size, int state)
  {
  	static char *states[] = {
  		[NLP_STE_UNUSED_NODE] = "UNUSED",
  		[NLP_STE_PLOGI_ISSUE] = "PLOGI",
  		[NLP_STE_ADISC_ISSUE] = "ADISC",
  		[NLP_STE_REG_LOGIN_ISSUE] = "REGLOGIN",
  		[NLP_STE_PRLI_ISSUE] = "PRLI",
  		[NLP_STE_LOGO_ISSUE] = "LOGO",
  		[NLP_STE_UNMAPPED_NODE] = "UNMAPPED",
  		[NLP_STE_MAPPED_NODE] = "MAPPED",
  		[NLP_STE_NPR_NODE] = "NPR",
  	};
  
  	if (state < NLP_STE_MAX_STATE && states[state])
  		strlcpy(buffer, states[state], size);
  	else
  		snprintf(buffer, size, "unknown (%d)", state);
  	return buffer;
  }
  
  void
  lpfc_nlp_set_state(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  		   int state)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	int  old_state = ndlp->nlp_state;
  	int node_dropped = ndlp->nlp_flag & NLP_DROPPED;
  	char name1[16], name2[16];
  
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
  			 "0904 NPort state transition x%06x, %s -> %s\n",
  			 ndlp->nlp_DID,
  			 lpfc_nlp_state_name(name1, sizeof(name1), old_state),
  			 lpfc_nlp_state_name(name2, sizeof(name2), state));
  
  	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
  		"node statechg    did:x%x old:%d ste:%d",
  		ndlp->nlp_DID, old_state, state);
  
  	if (node_dropped && old_state == NLP_STE_UNUSED_NODE &&
  	    state != NLP_STE_UNUSED_NODE) {
  		ndlp->nlp_flag &= ~NLP_DROPPED;
  		lpfc_nlp_get(ndlp);
  	}
  
  	if (old_state == NLP_STE_NPR_NODE &&
  	    state != NLP_STE_NPR_NODE)
  		lpfc_cancel_retry_delay_tmo(vport, ndlp);
  	if (old_state == NLP_STE_UNMAPPED_NODE) {
  		ndlp->nlp_flag &= ~NLP_TGT_NO_SCSIID;
  		ndlp->nlp_type &= ~NLP_FC_NODE;
  	}
  
  	if (list_empty(&ndlp->nlp_listp)) {
  		spin_lock_irq(shost->host_lock);
  		list_add_tail(&ndlp->nlp_listp, &vport->fc_nodes);
  		spin_unlock_irq(shost->host_lock);
  	} else if (old_state)
  		lpfc_nlp_counters(vport, old_state, -1);
  
  	ndlp->nlp_state = state;
  	lpfc_nlp_counters(vport, state, 1);
  	lpfc_nlp_state_cleanup(vport, ndlp, old_state, state);
  }
  
  void
  lpfc_enqueue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	if (list_empty(&ndlp->nlp_listp)) {
  		spin_lock_irq(shost->host_lock);
  		list_add_tail(&ndlp->nlp_listp, &vport->fc_nodes);
  		spin_unlock_irq(shost->host_lock);
  	}
  }
  
  void
  lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	lpfc_cancel_retry_delay_tmo(vport, ndlp);
  	if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp))
  		lpfc_nlp_counters(vport, ndlp->nlp_state, -1);
  	spin_lock_irq(shost->host_lock);
  	list_del_init(&ndlp->nlp_listp);
  	spin_unlock_irq(shost->host_lock);
  	lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state,
  				NLP_STE_UNUSED_NODE);
  }
  
  /**
   * lpfc_initialize_node - Initialize all fields of node object
   * @vport: Pointer to Virtual Port object.
   * @ndlp: Pointer to FC node object.
   * @did: FC_ID of the node.
   *
   * This function is always called when node object need to be initialized.
   * It initializes all the fields of the node object. Although the reference
   * to phba from @ndlp can be obtained indirectly through it's reference to
   * @vport, a direct reference to phba is taken here by @ndlp. This is due
   * to the life-span of the @ndlp might go beyond the existence of @vport as
   * the final release of ndlp is determined by its reference count. And, the
   * operation on @ndlp needs the reference to phba.
   **/
  static inline void
  lpfc_initialize_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  	uint32_t did)
  {
  	INIT_LIST_HEAD(&ndlp->els_retry_evt.evt_listp);
  	INIT_LIST_HEAD(&ndlp->dev_loss_evt.evt_listp);
  	timer_setup(&ndlp->nlp_delayfunc, lpfc_els_retry_delay, 0);
  	INIT_LIST_HEAD(&ndlp->recovery_evt.evt_listp);
  
  	ndlp->nlp_DID = did;
  	ndlp->vport = vport;
  	ndlp->phba = vport->phba;
  	ndlp->nlp_sid = NLP_NO_SID;
  	ndlp->nlp_fc4_type = NLP_FC4_NONE;
  	kref_init(&ndlp->kref);
  	atomic_set(&ndlp->cmd_pending, 0);
  	ndlp->cmd_qdepth = vport->cfg_tgt_queue_depth;
  	ndlp->nlp_defer_did = NLP_EVT_NOTHING_PENDING;
  }
  
  void
  lpfc_drop_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
  {
  	/*
  	 * Use of lpfc_drop_node and UNUSED list: lpfc_drop_node should
  	 * be used if we wish to issue the "last" lpfc_nlp_put() to remove
  	 * the ndlp from the vport. The ndlp marked as UNUSED on the list
  	 * until ALL other outstanding threads have completed. We check
  	 * that the ndlp not already in the UNUSED state before we proceed.
  	 */
  	if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
  		return;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNUSED_NODE);
  	ndlp->nlp_flag |= NLP_DROPPED;
  	if (vport->phba->sli_rev == LPFC_SLI_REV4) {
  		lpfc_cleanup_vports_rrqs(vport, ndlp);
  		lpfc_unreg_rpi(vport, ndlp);
  	}
  
  	lpfc_nlp_put(ndlp);
  	return;
  }
  
  /*
   * Start / ReStart rescue timer for Discovery / RSCN handling
   */
  void
  lpfc_set_disctmo(struct lpfc_vport *vport)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba  *phba = vport->phba;
  	uint32_t tmo;
  
  	if (vport->port_state == LPFC_LOCAL_CFG_LINK) {
  		/* For FAN, timeout should be greater than edtov */
  		tmo = (((phba->fc_edtov + 999) / 1000) + 1);
  	} else {
  		/* Normal discovery timeout should be > than ELS/CT timeout
  		 * FC spec states we need 3 * ratov for CT requests
  		 */
  		tmo = ((phba->fc_ratov * 3) + 3);
  	}
  
  
  	if (!timer_pending(&vport->fc_disctmo)) {
  		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
  			"set disc timer:  tmo:x%x state:x%x flg:x%x",
  			tmo, vport->port_state, vport->fc_flag);
  	}
  
  	mod_timer(&vport->fc_disctmo, jiffies + msecs_to_jiffies(1000 * tmo));
  	spin_lock_irq(shost->host_lock);
  	vport->fc_flag |= FC_DISC_TMO;
  	spin_unlock_irq(shost->host_lock);
  
  	/* Start Discovery Timer state <hba_state> */
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  			 "0247 Start Discovery Timer state x%x "
  			 "Data: x%x x%lx x%x x%x\n",
  			 vport->port_state, tmo,
  			 (unsigned long)&vport->fc_disctmo, vport->fc_plogi_cnt,
  			 vport->fc_adisc_cnt);
  
  	return;
  }
  
  /*
   * Cancel rescue timer for Discovery / RSCN handling
   */
  int
  lpfc_can_disctmo(struct lpfc_vport *vport)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	unsigned long iflags;
  
  	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
  		"can disc timer:  state:x%x rtry:x%x flg:x%x",
  		vport->port_state, vport->fc_ns_retry, vport->fc_flag);
  
  	/* Turn off discovery timer if its running */
  	if (vport->fc_flag & FC_DISC_TMO) {
  		spin_lock_irqsave(shost->host_lock, iflags);
  		vport->fc_flag &= ~FC_DISC_TMO;
  		spin_unlock_irqrestore(shost->host_lock, iflags);
  		del_timer_sync(&vport->fc_disctmo);
  		spin_lock_irqsave(&vport->work_port_lock, iflags);
  		vport->work_port_events &= ~WORKER_DISC_TMO;
  		spin_unlock_irqrestore(&vport->work_port_lock, iflags);
  	}
  
  	/* Cancel Discovery Timer state <hba_state> */
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  			 "0248 Cancel Discovery Timer state x%x "
  			 "Data: x%x x%x x%x\n",
  			 vport->port_state, vport->fc_flag,
  			 vport->fc_plogi_cnt, vport->fc_adisc_cnt);
  	return 0;
  }
  
  /*
   * Check specified ring for outstanding IOCB on the SLI queue
   * Return true if iocb matches the specified nport
   */
  int
  lpfc_check_sli_ndlp(struct lpfc_hba *phba,
  		    struct lpfc_sli_ring *pring,
  		    struct lpfc_iocbq *iocb,
  		    struct lpfc_nodelist *ndlp)
  {
  	IOCB_t *icmd = &iocb->iocb;
  	struct lpfc_vport    *vport = ndlp->vport;
  
  	if (iocb->vport != vport)
  		return 0;
  
  	if (pring->ringno == LPFC_ELS_RING) {
  		switch (icmd->ulpCommand) {
  		case CMD_GEN_REQUEST64_CR:
  			if (iocb->context_un.ndlp == ndlp)
  				return 1;
  			fallthrough;
  		case CMD_ELS_REQUEST64_CR:
  			if (icmd->un.elsreq64.remoteID == ndlp->nlp_DID)
  				return 1;
  			fallthrough;
  		case CMD_XMIT_ELS_RSP64_CX:
  			if (iocb->context1 == (uint8_t *) ndlp)
  				return 1;
  		}
  	} else if (pring->ringno == LPFC_FCP_RING) {
  		/* Skip match check if waiting to relogin to FCP target */
  		if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
  		    (ndlp->nlp_flag & NLP_DELAY_TMO)) {
  			return 0;
  		}
  		if (icmd->ulpContext == (volatile ushort)ndlp->nlp_rpi) {
  			return 1;
  		}
  	}
  	return 0;
  }
  
  static void
  __lpfc_dequeue_nport_iocbs(struct lpfc_hba *phba,
  		struct lpfc_nodelist *ndlp, struct lpfc_sli_ring *pring,
  		struct list_head *dequeue_list)
  {
  	struct lpfc_iocbq *iocb, *next_iocb;
  
  	list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
  		/* Check to see if iocb matches the nport */
  		if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp))
  			/* match, dequeue */
  			list_move_tail(&iocb->list, dequeue_list);
  	}
  }
  
  static void
  lpfc_sli3_dequeue_nport_iocbs(struct lpfc_hba *phba,
  		struct lpfc_nodelist *ndlp, struct list_head *dequeue_list)
  {
  	struct lpfc_sli *psli = &phba->sli;
  	uint32_t i;
  
  	spin_lock_irq(&phba->hbalock);
  	for (i = 0; i < psli->num_rings; i++)
  		__lpfc_dequeue_nport_iocbs(phba, ndlp, &psli->sli3_ring[i],
  						dequeue_list);
  	spin_unlock_irq(&phba->hbalock);
  }
  
  static void
  lpfc_sli4_dequeue_nport_iocbs(struct lpfc_hba *phba,
  		struct lpfc_nodelist *ndlp, struct list_head *dequeue_list)
  {
  	struct lpfc_sli_ring *pring;
  	struct lpfc_queue *qp = NULL;
  
  	spin_lock_irq(&phba->hbalock);
  	list_for_each_entry(qp, &phba->sli4_hba.lpfc_wq_list, wq_list) {
  		pring = qp->pring;
  		if (!pring)
  			continue;
  		spin_lock(&pring->ring_lock);
  		__lpfc_dequeue_nport_iocbs(phba, ndlp, pring, dequeue_list);
  		spin_unlock(&pring->ring_lock);
  	}
  	spin_unlock_irq(&phba->hbalock);
  }
  
  /*
   * Free resources / clean up outstanding I/Os
   * associated with nlp_rpi in the LPFC_NODELIST entry.
   */
  static int
  lpfc_no_rpi(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
  {
  	LIST_HEAD(completions);
  
  	lpfc_fabric_abort_nport(ndlp);
  
  	/*
  	 * Everything that matches on txcmplq will be returned
  	 * by firmware with a no rpi error.
  	 */
  	if (ndlp->nlp_flag & NLP_RPI_REGISTERED) {
  		if (phba->sli_rev != LPFC_SLI_REV4)
  			lpfc_sli3_dequeue_nport_iocbs(phba, ndlp, &completions);
  		else
  			lpfc_sli4_dequeue_nport_iocbs(phba, ndlp, &completions);
  	}
  
  	/* Cancel all the IOCBs from the completions list */
  	lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
  			      IOERR_SLI_ABORTED);
  
  	return 0;
  }
  
  /**
   * lpfc_nlp_logo_unreg - Unreg mailbox completion handler before LOGO
   * @phba: Pointer to HBA context object.
   * @pmb: Pointer to mailbox object.
   *
   * This function will issue an ELS LOGO command after completing
   * the UNREG_RPI.
   **/
  static void
  lpfc_nlp_logo_unreg(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
  {
  	struct lpfc_vport  *vport = pmb->vport;
  	struct lpfc_nodelist *ndlp;
  
  	ndlp = (struct lpfc_nodelist *)(pmb->ctx_ndlp);
  	if (!ndlp)
  		return;
  	lpfc_issue_els_logo(vport, ndlp, 0);
  	mempool_free(pmb, phba->mbox_mem_pool);
  
  	/* Check to see if there are any deferred events to process */
  	if ((ndlp->nlp_flag & NLP_UNREG_INP) &&
  	    (ndlp->nlp_defer_did != NLP_EVT_NOTHING_PENDING)) {
  		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  				 "1434 UNREG cmpl deferred logo x%x "
  				 "on NPort x%x Data: x%x x%px\n",
  				 ndlp->nlp_rpi, ndlp->nlp_DID,
  				 ndlp->nlp_defer_did, ndlp);
  
  		ndlp->nlp_flag &= ~NLP_UNREG_INP;
  		ndlp->nlp_defer_did = NLP_EVT_NOTHING_PENDING;
  		lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
  	} else {
  		/* NLP_RELEASE_RPI is only set for SLI4 ports. */
  		if (ndlp->nlp_flag & NLP_RELEASE_RPI) {
  			lpfc_sli4_free_rpi(vport->phba, ndlp->nlp_rpi);
  			spin_lock_irq(&ndlp->lock);
  			ndlp->nlp_flag &= ~NLP_RELEASE_RPI;
  			ndlp->nlp_rpi = LPFC_RPI_ALLOC_ERROR;
  			spin_unlock_irq(&ndlp->lock);
  		}
  		spin_lock_irq(&ndlp->lock);
  		ndlp->nlp_flag &= ~NLP_UNREG_INP;
  		spin_unlock_irq(&ndlp->lock);
  	}
  }
  
  /*
   * Sets the mailbox completion handler to be used for the
   * unreg_rpi command. The handler varies based on the state of
   * the port and what will be happening to the rpi next.
   */
  static void
  lpfc_set_unreg_login_mbx_cmpl(struct lpfc_hba *phba, struct lpfc_vport *vport,
  	struct lpfc_nodelist *ndlp, LPFC_MBOXQ_t *mbox)
  {
  	unsigned long iflags;
  
  	/* Driver always gets a reference on the mailbox job
  	 * in support of async jobs.
  	 */
  	mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
  	if (!mbox->ctx_ndlp)
  		return;
  
  	if (ndlp->nlp_flag & NLP_ISSUE_LOGO) {
  		mbox->mbox_cmpl = lpfc_nlp_logo_unreg;
  
  	} else if (phba->sli_rev == LPFC_SLI_REV4 &&
  		   (!(vport->load_flag & FC_UNLOADING)) &&
  		    (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) >=
  				      LPFC_SLI_INTF_IF_TYPE_2) &&
  		    (kref_read(&ndlp->kref) > 0)) {
  		mbox->mbox_cmpl = lpfc_sli4_unreg_rpi_cmpl_clr;
  	} else {
  		if (vport->load_flag & FC_UNLOADING) {
  			if (phba->sli_rev == LPFC_SLI_REV4) {
  				spin_lock_irqsave(&ndlp->lock, iflags);
  				ndlp->nlp_flag |= NLP_RELEASE_RPI;
  				spin_unlock_irqrestore(&ndlp->lock, iflags);
  			}
  		}
  		mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
  	}
  }
  
  /*
   * Free rpi associated with LPFC_NODELIST entry.
   * This routine is called from lpfc_freenode(), when we are removing
   * a LPFC_NODELIST entry. It is also called if the driver initiates a
   * LOGO that completes successfully, and we are waiting to PLOGI back
   * to the remote NPort. In addition, it is called after we receive
   * and unsolicated ELS cmd, send back a rsp, the rsp completes and
   * we are waiting to PLOGI back to the remote NPort.
   */
  int
  lpfc_unreg_rpi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
  {
  	struct lpfc_hba *phba = vport->phba;
  	LPFC_MBOXQ_t    *mbox;
  	int rc, acc_plogi = 1;
  	uint16_t rpi;
  
  	if (ndlp->nlp_flag & NLP_RPI_REGISTERED ||
  	    ndlp->nlp_flag & NLP_REG_LOGIN_SEND) {
  		if (ndlp->nlp_flag & NLP_REG_LOGIN_SEND)
  			lpfc_printf_vlog(vport, KERN_INFO,
  					 LOG_NODE | LOG_DISCOVERY,
  					 "3366 RPI x%x needs to be "
  					 "unregistered nlp_flag x%x "
  					 "did x%x\n",
  					 ndlp->nlp_rpi, ndlp->nlp_flag,
  					 ndlp->nlp_DID);
  
  		/* If there is already an UNREG in progress for this ndlp,
  		 * no need to queue up another one.
  		 */
  		if (ndlp->nlp_flag & NLP_UNREG_INP) {
  			lpfc_printf_vlog(vport, KERN_INFO,
  					 LOG_NODE | LOG_DISCOVERY,
  					 "1436 unreg_rpi SKIP UNREG x%x on "
  					 "NPort x%x deferred x%x  flg x%x "
  					 "Data: x%px\n",
  					 ndlp->nlp_rpi, ndlp->nlp_DID,
  					 ndlp->nlp_defer_did,
  					 ndlp->nlp_flag, ndlp);
  			goto out;
  		}
  
  		mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  		if (mbox) {
  			/* SLI4 ports require the physical rpi value. */
  			rpi = ndlp->nlp_rpi;
  			if (phba->sli_rev == LPFC_SLI_REV4)
  				rpi = phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
  
  			lpfc_unreg_login(phba, vport->vpi, rpi, mbox);
  			mbox->vport = vport;
  			lpfc_set_unreg_login_mbx_cmpl(phba, vport, ndlp, mbox);
  			if (!mbox->ctx_ndlp) {
  				mempool_free(mbox, phba->mbox_mem_pool);
  				return 1;
  			}
  
  			if (mbox->mbox_cmpl == lpfc_sli4_unreg_rpi_cmpl_clr)
  				/*
  				 * accept PLOGIs after unreg_rpi_cmpl
  				 */
  				acc_plogi = 0;
  			if (((ndlp->nlp_DID & Fabric_DID_MASK) !=
  			    Fabric_DID_MASK) &&
  			    (!(vport->fc_flag & FC_OFFLINE_MODE)))
  				ndlp->nlp_flag |= NLP_UNREG_INP;
  
  			lpfc_printf_vlog(vport, KERN_INFO,
  					 LOG_NODE | LOG_DISCOVERY,
  					 "1433 unreg_rpi UNREG x%x on "
  					 "NPort x%x deferred flg x%x "
  					 "Data:x%px\n",
  					 ndlp->nlp_rpi, ndlp->nlp_DID,
  					 ndlp->nlp_flag, ndlp);
  
  			rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
  			if (rc == MBX_NOT_FINISHED) {
  				mempool_free(mbox, phba->mbox_mem_pool);
  				acc_plogi = 1;
  			}
  		} else {
  			lpfc_printf_vlog(vport, KERN_INFO,
  					 LOG_NODE | LOG_DISCOVERY,
  					 "1444 Failed to allocate mempool "
  					 "unreg_rpi UNREG x%x, "
  					 "DID x%x, flag x%x, "
  					 "ndlp x%px\n",
  					 ndlp->nlp_rpi, ndlp->nlp_DID,
  					 ndlp->nlp_flag, ndlp);
  
  			/* Because mempool_alloc failed, we
  			 * will issue a LOGO here and keep the rpi alive if
  			 * not unloading.
  			 */
  			if (!(vport->load_flag & FC_UNLOADING)) {
  				ndlp->nlp_flag &= ~NLP_UNREG_INP;
  				lpfc_issue_els_logo(vport, ndlp, 0);
  				ndlp->nlp_prev_state = ndlp->nlp_state;
  				lpfc_nlp_set_state(vport, ndlp,
  						   NLP_STE_NPR_NODE);
  			}
  
  			return 1;
  		}
  		lpfc_no_rpi(phba, ndlp);
  out:
  		if (phba->sli_rev != LPFC_SLI_REV4)
  			ndlp->nlp_rpi = 0;
  		ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;
  		ndlp->nlp_flag &= ~NLP_NPR_ADISC;
  		if (acc_plogi)
  			ndlp->nlp_flag &= ~NLP_LOGO_ACC;
  		return 1;
  	}
  	ndlp->nlp_flag &= ~NLP_LOGO_ACC;
  	return 0;
  }
  
  /**
   * lpfc_unreg_hba_rpis - Unregister rpis registered to the hba.
   * @phba: pointer to lpfc hba data structure.
   *
   * This routine is invoked to unregister all the currently registered RPIs
   * to the HBA.
   **/
  void
  lpfc_unreg_hba_rpis(struct lpfc_hba *phba)
  {
  	struct lpfc_vport **vports;
  	struct lpfc_nodelist *ndlp;
  	struct Scsi_Host *shost;
  	int i;
  
  	vports = lpfc_create_vport_work_array(phba);
  	if (!vports) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"2884 Vport array allocation failed \n");
  		return;
  	}
  	for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
  		shost = lpfc_shost_from_vport(vports[i]);
  		spin_lock_irq(shost->host_lock);
  		list_for_each_entry(ndlp, &vports[i]->fc_nodes, nlp_listp) {
  			if (ndlp->nlp_flag & NLP_RPI_REGISTERED) {
  				/* The mempool_alloc might sleep */
  				spin_unlock_irq(shost->host_lock);
  				lpfc_unreg_rpi(vports[i], ndlp);
  				spin_lock_irq(shost->host_lock);
  			}
  		}
  		spin_unlock_irq(shost->host_lock);
  	}
  	lpfc_destroy_vport_work_array(phba, vports);
  }
  
  void
  lpfc_unreg_all_rpis(struct lpfc_vport *vport)
  {
  	struct lpfc_hba  *phba  = vport->phba;
  	LPFC_MBOXQ_t     *mbox;
  	int rc;
  
  	if (phba->sli_rev == LPFC_SLI_REV4) {
  		lpfc_sli4_unreg_all_rpis(vport);
  		return;
  	}
  
  	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  	if (mbox) {
  		lpfc_unreg_login(phba, vport->vpi, LPFC_UNREG_ALL_RPIS_VPORT,
  				 mbox);
  		mbox->vport = vport;
  		mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
  		mbox->ctx_ndlp = NULL;
  		rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_TMO);
  		if (rc != MBX_TIMEOUT)
  			mempool_free(mbox, phba->mbox_mem_pool);
  
  		if ((rc == MBX_TIMEOUT) || (rc == MBX_NOT_FINISHED))
  			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  					 "1836 Could not issue "
  					 "unreg_login(all_rpis) status %d\n",
  					 rc);
  	}
  }
  
  void
  lpfc_unreg_default_rpis(struct lpfc_vport *vport)
  {
  	struct lpfc_hba  *phba  = vport->phba;
  	LPFC_MBOXQ_t     *mbox;
  	int rc;
  
  	/* Unreg DID is an SLI3 operation. */
  	if (phba->sli_rev > LPFC_SLI_REV3)
  		return;
  
  	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  	if (mbox) {
  		lpfc_unreg_did(phba, vport->vpi, LPFC_UNREG_ALL_DFLT_RPIS,
  			       mbox);
  		mbox->vport = vport;
  		mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
  		mbox->ctx_ndlp = NULL;
  		rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_TMO);
  		if (rc != MBX_TIMEOUT)
  			mempool_free(mbox, phba->mbox_mem_pool);
  
  		if ((rc == MBX_TIMEOUT) || (rc == MBX_NOT_FINISHED))
  			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
  					 "1815 Could not issue "
  					 "unreg_did (default rpis) status %d\n",
  					 rc);
  	}
  }
  
  /*
   * Free resources associated with LPFC_NODELIST entry
   * so it can be freed.
   */
  static int
  lpfc_cleanup_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
  {
  	struct lpfc_hba  *phba = vport->phba;
  	LPFC_MBOXQ_t *mb, *nextmb;
  	struct lpfc_dmabuf *mp;
  
  	/* Cleanup node for NPort <nlp_DID> */
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
  			 "0900 Cleanup node for NPort x%x "
  			 "Data: x%x x%x x%x\n",
  			 ndlp->nlp_DID, ndlp->nlp_flag,
  			 ndlp->nlp_state, ndlp->nlp_rpi);
  	lpfc_dequeue_node(vport, ndlp);
  
  	/* Don't need to clean up REG_LOGIN64 cmds for Default RPI cleanup */
  
  	/* cleanup any ndlp on mbox q waiting for reglogin cmpl */
  	if ((mb = phba->sli.mbox_active)) {
  		if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
  		   !(mb->mbox_flag & LPFC_MBX_IMED_UNREG) &&
  		   (ndlp == (struct lpfc_nodelist *)mb->ctx_ndlp)) {
  			mb->ctx_ndlp = NULL;
  			mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
  		}
  	}
  
  	spin_lock_irq(&phba->hbalock);
  	/* Cleanup REG_LOGIN completions which are not yet processed */
  	list_for_each_entry(mb, &phba->sli.mboxq_cmpl, list) {
  		if ((mb->u.mb.mbxCommand != MBX_REG_LOGIN64) ||
  			(mb->mbox_flag & LPFC_MBX_IMED_UNREG) ||
  			(ndlp != (struct lpfc_nodelist *)mb->ctx_ndlp))
  			continue;
  
  		mb->ctx_ndlp = NULL;
  		mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
  	}
  
  	list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
  		if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
  		   !(mb->mbox_flag & LPFC_MBX_IMED_UNREG) &&
  		    (ndlp == (struct lpfc_nodelist *)mb->ctx_ndlp)) {
  			mp = (struct lpfc_dmabuf *)(mb->ctx_buf);
  			if (mp) {
  				__lpfc_mbuf_free(phba, mp->virt, mp->phys);
  				kfree(mp);
  			}
  			list_del(&mb->list);
  			mempool_free(mb, phba->mbox_mem_pool);
  			/* We shall not invoke the lpfc_nlp_put to decrement
  			 * the ndlp reference count as we are in the process
  			 * of lpfc_nlp_release.
  			 */
  		}
  	}
  	spin_unlock_irq(&phba->hbalock);
  
  	lpfc_els_abort(phba, ndlp);
  
  	spin_lock_irq(&ndlp->lock);
  	ndlp->nlp_flag &= ~NLP_DELAY_TMO;
  	spin_unlock_irq(&ndlp->lock);
  
  	ndlp->nlp_last_elscmd = 0;
  	del_timer_sync(&ndlp->nlp_delayfunc);
  
  	list_del_init(&ndlp->els_retry_evt.evt_listp);
  	list_del_init(&ndlp->dev_loss_evt.evt_listp);
  	list_del_init(&ndlp->recovery_evt.evt_listp);
  	lpfc_cleanup_vports_rrqs(vport, ndlp);
  
  	if (phba->sli_rev == LPFC_SLI_REV4)
  		ndlp->nlp_flag |= NLP_RELEASE_RPI;
  
  	return 0;
  }
  
  static int
  lpfc_matchdid(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  	      uint32_t did)
  {
  	D_ID mydid, ndlpdid, matchdid;
  
  	if (did == Bcast_DID)
  		return 0;
  
  	/* First check for Direct match */
  	if (ndlp->nlp_DID == did)
  		return 1;
  
  	/* Next check for area/domain identically equals 0 match */
  	mydid.un.word = vport->fc_myDID;
  	if ((mydid.un.b.domain == 0) && (mydid.un.b.area == 0)) {
  		return 0;
  	}
  
  	matchdid.un.word = did;
  	ndlpdid.un.word = ndlp->nlp_DID;
  	if (matchdid.un.b.id == ndlpdid.un.b.id) {
  		if ((mydid.un.b.domain == matchdid.un.b.domain) &&
  		    (mydid.un.b.area == matchdid.un.b.area)) {
  			/* This code is supposed to match the ID
  			 * for a private loop device that is
  			 * connect to fl_port. But we need to
  			 * check that the port did not just go
  			 * from pt2pt to fabric or we could end
  			 * up matching ndlp->nlp_DID 000001 to
  			 * fabric DID 0x20101
  			 */
  			if ((ndlpdid.un.b.domain == 0) &&
  			    (ndlpdid.un.b.area == 0)) {
  				if (ndlpdid.un.b.id &&
  				    vport->phba->fc_topology ==
  				    LPFC_TOPOLOGY_LOOP)
  					return 1;
  			}
  			return 0;
  		}
  
  		matchdid.un.word = ndlp->nlp_DID;
  		if ((mydid.un.b.domain == ndlpdid.un.b.domain) &&
  		    (mydid.un.b.area == ndlpdid.un.b.area)) {
  			if ((matchdid.un.b.domain == 0) &&
  			    (matchdid.un.b.area == 0)) {
  				if (matchdid.un.b.id)
  					return 1;
  			}
  		}
  	}
  	return 0;
  }
  
  /* Search for a nodelist entry */
  static struct lpfc_nodelist *
  __lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
  {
  	struct lpfc_nodelist *ndlp;
  	uint32_t data1;
  
  	list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
  		if (lpfc_matchdid(vport, ndlp, did)) {
  			data1 = (((uint32_t)ndlp->nlp_state << 24) |
  				 ((uint32_t)ndlp->nlp_xri << 16) |
  				 ((uint32_t)ndlp->nlp_type << 8)
  				 );
  			lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
  					 "0929 FIND node DID "
  					 "Data: x%px x%x x%x x%x x%x x%px\n",
  					 ndlp, ndlp->nlp_DID,
  					 ndlp->nlp_flag, data1, ndlp->nlp_rpi,
  					 ndlp->active_rrqs_xri_bitmap);
  			return ndlp;
  		}
  	}
  
  	/* FIND node did <did> NOT FOUND */
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
  			 "0932 FIND node did x%x NOT FOUND.\n", did);
  	return NULL;
  }
  
  struct lpfc_nodelist *
  lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_nodelist *ndlp;
  	unsigned long iflags;
  
  	spin_lock_irqsave(shost->host_lock, iflags);
  	ndlp = __lpfc_findnode_did(vport, did);
  	spin_unlock_irqrestore(shost->host_lock, iflags);
  	return ndlp;
  }
  
  struct lpfc_nodelist *
  lpfc_findnode_mapped(struct lpfc_vport *vport)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_nodelist *ndlp;
  	uint32_t data1;
  	unsigned long iflags;
  
  	spin_lock_irqsave(shost->host_lock, iflags);
  
  	list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
  		if (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE ||
  		    ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
  			data1 = (((uint32_t)ndlp->nlp_state << 24) |
  				 ((uint32_t)ndlp->nlp_xri << 16) |
  				 ((uint32_t)ndlp->nlp_type << 8) |
  				 ((uint32_t)ndlp->nlp_rpi & 0xff));
  			spin_unlock_irqrestore(shost->host_lock, iflags);
  			lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
  					 "2025 FIND node DID "
  					 "Data: x%px x%x x%x x%x x%px\n",
  					 ndlp, ndlp->nlp_DID,
  					 ndlp->nlp_flag, data1,
  					 ndlp->active_rrqs_xri_bitmap);
  			return ndlp;
  		}
  	}
  	spin_unlock_irqrestore(shost->host_lock, iflags);
  
  	/* FIND node did <did> NOT FOUND */
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
  			 "2026 FIND mapped did NOT FOUND.\n");
  	return NULL;
  }
  
  struct lpfc_nodelist *
  lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did)
  {
  	struct lpfc_nodelist *ndlp;
  
  	ndlp = lpfc_findnode_did(vport, did);
  	if (!ndlp) {
  		if (vport->phba->nvmet_support)
  			return NULL;
  		if ((vport->fc_flag & FC_RSCN_MODE) != 0 &&
  		    lpfc_rscn_payload_check(vport, did) == 0)
  			return NULL;
  		ndlp = lpfc_nlp_init(vport, did);
  		if (!ndlp)
  			return NULL;
  		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  
  		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  				 "6453 Setup New Node 2B_DISC x%x "
  				 "Data:x%x x%x x%x\n",
  				 ndlp->nlp_DID, ndlp->nlp_flag,
  				 ndlp->nlp_state, vport->fc_flag);
  
  		spin_lock_irq(&ndlp->lock);
  		ndlp->nlp_flag |= NLP_NPR_2B_DISC;
  		spin_unlock_irq(&ndlp->lock);
  		return ndlp;
  	}
  
  	/* The NVME Target does not want to actively manage an rport.
  	 * The goal is to allow the target to reset its state and clear
  	 * pending IO in preparation for the initiator to recover.
  	 */
  	if ((vport->fc_flag & FC_RSCN_MODE) &&
  	    !(vport->fc_flag & FC_NDISC_ACTIVE)) {
  		if (lpfc_rscn_payload_check(vport, did)) {
  
  			/* Since this node is marked for discovery,
  			 * delay timeout is not needed.
  			 */
  			lpfc_cancel_retry_delay_tmo(vport, ndlp);
  
  			lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  					 "6455 Setup RSCN Node 2B_DISC x%x "
  					 "Data:x%x x%x x%x\n",
  					 ndlp->nlp_DID, ndlp->nlp_flag,
  					 ndlp->nlp_state, vport->fc_flag);
  
  			/* NVME Target mode waits until rport is known to be
  			 * impacted by the RSCN before it transitions.  No
  			 * active management - just go to NPR provided the
  			 * node had a valid login.
  			 */
  			if (vport->phba->nvmet_support)
  				return ndlp;
  
  			/* If we've already received a PLOGI from this NPort
  			 * we don't need to try to discover it again.
  			 */
  			if (ndlp->nlp_flag & NLP_RCV_PLOGI &&
  			    !(ndlp->nlp_type &
  			     (NLP_FCP_TARGET | NLP_NVME_TARGET)))
  				return NULL;
  
  			ndlp->nlp_prev_state = ndlp->nlp_state;
  			lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  
  			spin_lock_irq(&ndlp->lock);
  			ndlp->nlp_flag |= NLP_NPR_2B_DISC;
  			spin_unlock_irq(&ndlp->lock);
  		} else {
  			lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  					 "6456 Skip Setup RSCN Node x%x "
  					 "Data:x%x x%x x%x\n",
  					 ndlp->nlp_DID, ndlp->nlp_flag,
  					 ndlp->nlp_state, vport->fc_flag);
  			ndlp = NULL;
  		}
  	} else {
  		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  				 "6457 Setup Active Node 2B_DISC x%x "
  				 "Data:x%x x%x x%x\n",
  				 ndlp->nlp_DID, ndlp->nlp_flag,
  				 ndlp->nlp_state, vport->fc_flag);
  
  		/* If the initiator received a PLOGI from this NPort or if the
  		 * initiator is already in the process of discovery on it,
  		 * there's no need to try to discover it again.
  		 */
  		if (ndlp->nlp_state == NLP_STE_ADISC_ISSUE ||
  		    ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
  		    (!vport->phba->nvmet_support &&
  		     ndlp->nlp_flag & NLP_RCV_PLOGI))
  			return NULL;
  
  		if (vport->phba->nvmet_support)
  			return ndlp;
  
  		/* Moving to NPR state clears unsolicited flags and
  		 * allows for rediscovery
  		 */
  		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
  
  		spin_lock_irq(&ndlp->lock);
  		ndlp->nlp_flag |= NLP_NPR_2B_DISC;
  		spin_unlock_irq(&ndlp->lock);
  	}
  	return ndlp;
  }
  
  /* Build a list of nodes to discover based on the loopmap */
  void
  lpfc_disc_list_loopmap(struct lpfc_vport *vport)
  {
  	struct lpfc_hba  *phba = vport->phba;
  	int j;
  	uint32_t alpa, index;
  
  	if (!lpfc_is_link_up(phba))
  		return;
  
  	if (phba->fc_topology != LPFC_TOPOLOGY_LOOP)
  		return;
  
  	/* Check for loop map present or not */
  	if (phba->alpa_map[0]) {
  		for (j = 1; j <= phba->alpa_map[0]; j++) {
  			alpa = phba->alpa_map[j];
  			if (((vport->fc_myDID & 0xff) == alpa) || (alpa == 0))
  				continue;
  			lpfc_setup_disc_node(vport, alpa);
  		}
  	} else {
  		/* No alpamap, so try all alpa's */
  		for (j = 0; j < FC_MAXLOOP; j++) {
  			/* If cfg_scan_down is set, start from highest
  			 * ALPA (0xef) to lowest (0x1).
  			 */
  			if (vport->cfg_scan_down)
  				index = j;
  			else
  				index = FC_MAXLOOP - j - 1;
  			alpa = lpfcAlpaArray[index];
  			if ((vport->fc_myDID & 0xff) == alpa)
  				continue;
  			lpfc_setup_disc_node(vport, alpa);
  		}
  	}
  	return;
  }
  
  /* SLI3 only */
  void
  lpfc_issue_clear_la(struct lpfc_hba *phba, struct lpfc_vport *vport)
  {
  	LPFC_MBOXQ_t *mbox;
  	struct lpfc_sli *psli = &phba->sli;
  	struct lpfc_sli_ring *extra_ring = &psli->sli3_ring[LPFC_EXTRA_RING];
  	struct lpfc_sli_ring *fcp_ring   = &psli->sli3_ring[LPFC_FCP_RING];
  	int  rc;
  
  	/*
  	 * if it's not a physical port or if we already send
  	 * clear_la then don't send it.
  	 */
  	if ((phba->link_state >= LPFC_CLEAR_LA) ||
  	    (vport->port_type != LPFC_PHYSICAL_PORT) ||
  		(phba->sli_rev == LPFC_SLI_REV4))
  		return;
  
  			/* Link up discovery */
  	if ((mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL)) != NULL) {
  		phba->link_state = LPFC_CLEAR_LA;
  		lpfc_clear_la(phba, mbox);
  		mbox->mbox_cmpl = lpfc_mbx_cmpl_clear_la;
  		mbox->vport = vport;
  		rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
  		if (rc == MBX_NOT_FINISHED) {
  			mempool_free(mbox, phba->mbox_mem_pool);
  			lpfc_disc_flush_list(vport);
  			extra_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
  			fcp_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
  			phba->link_state = LPFC_HBA_ERROR;
  		}
  	}
  }
  
  /* Reg_vpi to tell firmware to resume normal operations */
  void
  lpfc_issue_reg_vpi(struct lpfc_hba *phba, struct lpfc_vport *vport)
  {
  	LPFC_MBOXQ_t *regvpimbox;
  
  	regvpimbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  	if (regvpimbox) {
  		lpfc_reg_vpi(vport, regvpimbox);
  		regvpimbox->mbox_cmpl = lpfc_mbx_cmpl_reg_vpi;
  		regvpimbox->vport = vport;
  		if (lpfc_sli_issue_mbox(phba, regvpimbox, MBX_NOWAIT)
  					== MBX_NOT_FINISHED) {
  			mempool_free(regvpimbox, phba->mbox_mem_pool);
  		}
  	}
  }
  
  /* Start Link up / RSCN discovery on NPR nodes */
  void
  lpfc_disc_start(struct lpfc_vport *vport)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba  *phba = vport->phba;
  	uint32_t num_sent;
  	uint32_t clear_la_pending;
  
  	if (!lpfc_is_link_up(phba)) {
  		lpfc_printf_vlog(vport, KERN_INFO, LOG_SLI,
  				 "3315 Link is not up %x\n",
  				 phba->link_state);
  		return;
  	}
  
  	if (phba->link_state == LPFC_CLEAR_LA)
  		clear_la_pending = 1;
  	else
  		clear_la_pending = 0;
  
  	if (vport->port_state < LPFC_VPORT_READY)
  		vport->port_state = LPFC_DISC_AUTH;
  
  	lpfc_set_disctmo(vport);
  
  	vport->fc_prevDID = vport->fc_myDID;
  	vport->num_disc_nodes = 0;
  
  	/* Start Discovery state <hba_state> */
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
  			 "0202 Start Discovery port state x%x "
  			 "flg x%x Data: x%x x%x x%x\n",
  			 vport->port_state, vport->fc_flag, vport->fc_plogi_cnt,
  			 vport->fc_adisc_cnt, vport->fc_npr_cnt);
  
  	/* First do ADISCs - if any */
  	num_sent = lpfc_els_disc_adisc(vport);
  
  	if (num_sent)
  		return;
  
  	/* Register the VPI for SLI3, NPIV only. */
  	if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
  	    !(vport->fc_flag & FC_PT2PT) &&
  	    !(vport->fc_flag & FC_RSCN_MODE) &&
  	    (phba->sli_rev < LPFC_SLI_REV4)) {
  		lpfc_issue_clear_la(phba, vport);
  		lpfc_issue_reg_vpi(phba, vport);
  		return;
  	}
  
  	/*
  	 * For SLI2, we need to set port_state to READY and continue
  	 * discovery.
  	 */
  	if (vport->port_state < LPFC_VPORT_READY && !clear_la_pending) {
  		/* If we get here, there is nothing to ADISC */
  		lpfc_issue_clear_la(phba, vport);
  
  		if (!(vport->fc_flag & FC_ABORT_DISCOVERY)) {
  			vport->num_disc_nodes = 0;
  			/* go thru NPR nodes and issue ELS PLOGIs */
  			if (vport->fc_npr_cnt)
  				lpfc_els_disc_plogi(vport);
  
  			if (!vport->num_disc_nodes) {
  				spin_lock_irq(shost->host_lock);
  				vport->fc_flag &= ~FC_NDISC_ACTIVE;
  				spin_unlock_irq(shost->host_lock);
  				lpfc_can_disctmo(vport);
  			}
  		}
  		vport->port_state = LPFC_VPORT_READY;
  	} else {
  		/* Next do PLOGIs - if any */
  		num_sent = lpfc_els_disc_plogi(vport);
  
  		if (num_sent)
  			return;
  
  		if (vport->fc_flag & FC_RSCN_MODE) {
  			/* Check to see if more RSCNs came in while we
  			 * were processing this one.
  			 */
  			if ((vport->fc_rscn_id_cnt == 0) &&
  			    (!(vport->fc_flag & FC_RSCN_DISCOVERY))) {
  				spin_lock_irq(shost->host_lock);
  				vport->fc_flag &= ~FC_RSCN_MODE;
  				spin_unlock_irq(shost->host_lock);
  				lpfc_can_disctmo(vport);
  			} else
  				lpfc_els_handle_rscn(vport);
  		}
  	}
  	return;
  }
  
  /*
   *  Ignore completion for all IOCBs on tx and txcmpl queue for ELS
   *  ring the match the sppecified nodelist.
   */
  static void
  lpfc_free_tx(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
  {
  	LIST_HEAD(completions);
  	IOCB_t     *icmd;
  	struct lpfc_iocbq    *iocb, *next_iocb;
  	struct lpfc_sli_ring *pring;
  
  	pring = lpfc_phba_elsring(phba);
  	if (unlikely(!pring))
  		return;
  
  	/* Error matching iocb on txq or txcmplq
  	 * First check the txq.
  	 */
  	spin_lock_irq(&phba->hbalock);
  	list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
  		if (iocb->context1 != ndlp) {
  			continue;
  		}
  		icmd = &iocb->iocb;
  		if ((icmd->ulpCommand == CMD_ELS_REQUEST64_CR) ||
  		    (icmd->ulpCommand == CMD_XMIT_ELS_RSP64_CX)) {
  
  			list_move_tail(&iocb->list, &completions);
  		}
  	}
  
  	/* Next check the txcmplq */
  	list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
  		if (iocb->context1 != ndlp) {
  			continue;
  		}
  		icmd = &iocb->iocb;
  		if (icmd->ulpCommand == CMD_ELS_REQUEST64_CR ||
  		    icmd->ulpCommand == CMD_XMIT_ELS_RSP64_CX) {
  			lpfc_sli_issue_abort_iotag(phba, pring, iocb, NULL);
  		}
  	}
  	spin_unlock_irq(&phba->hbalock);
  
  	/* Make sure HBA is alive */
  	lpfc_issue_hb_tmo(phba);
  
  	/* Cancel all the IOCBs from the completions list */
  	lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
  			      IOERR_SLI_ABORTED);
  }
  
  static void
  lpfc_disc_flush_list(struct lpfc_vport *vport)
  {
  	struct lpfc_nodelist *ndlp, *next_ndlp;
  	struct lpfc_hba *phba = vport->phba;
  
  	if (vport->fc_plogi_cnt || vport->fc_adisc_cnt) {
  		list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
  					 nlp_listp) {
  			if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
  			    ndlp->nlp_state == NLP_STE_ADISC_ISSUE) {
  				lpfc_free_tx(phba, ndlp);
  			}
  		}
  	}
  }
  
  void
  lpfc_cleanup_discovery_resources(struct lpfc_vport *vport)
  {
  	lpfc_els_flush_rscn(vport);
  	lpfc_els_flush_cmd(vport);
  	lpfc_disc_flush_list(vport);
  }
  
  /*****************************************************************************/
  /*
   * NAME:     lpfc_disc_timeout
   *
   * FUNCTION: Fibre Channel driver discovery timeout routine.
   *
   * EXECUTION ENVIRONMENT: interrupt only
   *
   * CALLED FROM:
   *      Timer function
   *
   * RETURNS:
   *      none
   */
  /*****************************************************************************/
  void
  lpfc_disc_timeout(struct timer_list *t)
  {
  	struct lpfc_vport *vport = from_timer(vport, t, fc_disctmo);
  	struct lpfc_hba   *phba = vport->phba;
  	uint32_t tmo_posted;
  	unsigned long flags = 0;
  
  	if (unlikely(!phba))
  		return;
  
  	spin_lock_irqsave(&vport->work_port_lock, flags);
  	tmo_posted = vport->work_port_events & WORKER_DISC_TMO;
  	if (!tmo_posted)
  		vport->work_port_events |= WORKER_DISC_TMO;
  	spin_unlock_irqrestore(&vport->work_port_lock, flags);
  
  	if (!tmo_posted)
  		lpfc_worker_wake_up(phba);
  	return;
  }
  
  static void
  lpfc_disc_timeout_handler(struct lpfc_vport *vport)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_hba  *phba = vport->phba;
  	struct lpfc_sli  *psli = &phba->sli;
  	struct lpfc_nodelist *ndlp, *next_ndlp;
  	LPFC_MBOXQ_t *initlinkmbox;
  	int rc, clrlaerr = 0;
  
  	if (!(vport->fc_flag & FC_DISC_TMO))
  		return;
  
  	spin_lock_irq(shost->host_lock);
  	vport->fc_flag &= ~FC_DISC_TMO;
  	spin_unlock_irq(shost->host_lock);
  
  	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
  		"disc timeout:    state:x%x rtry:x%x flg:x%x",
  		vport->port_state, vport->fc_ns_retry, vport->fc_flag);
  
  	switch (vport->port_state) {
  
  	case LPFC_LOCAL_CFG_LINK:
  		/*
  		 * port_state is identically  LPFC_LOCAL_CFG_LINK while
  		 * waiting for FAN timeout
  		 */
  		lpfc_printf_vlog(vport, KERN_WARNING, LOG_DISCOVERY,
  				 "0221 FAN timeout\n");
  
  		/* Start discovery by sending FLOGI, clean up old rpis */
  		list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
  					 nlp_listp) {
  			if (ndlp->nlp_state != NLP_STE_NPR_NODE)
  				continue;
  			if (ndlp->nlp_type & NLP_FABRIC) {
  				/* Clean up the ndlp on Fabric connections */
  				lpfc_drop_node(vport, ndlp);
  
  			} else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) {
  				/* Fail outstanding IO now since device
  				 * is marked for PLOGI.
  				 */
  				lpfc_unreg_rpi(vport, ndlp);
  			}
  		}
  		if (vport->port_state != LPFC_FLOGI) {
  			if (phba->sli_rev <= LPFC_SLI_REV3)
  				lpfc_initial_flogi(vport);
  			else
  				lpfc_issue_init_vfi(vport);
  			return;
  		}
  		break;
  
  	case LPFC_FDISC:
  	case LPFC_FLOGI:
  	/* port_state is identically LPFC_FLOGI while waiting for FLOGI cmpl */
  		/* Initial FLOGI timeout */
  		lpfc_printf_vlog(vport, KERN_ERR,
  				 LOG_TRACE_EVENT,
  				 "0222 Initial %s timeout\n",
  				 vport->vpi ? "FDISC" : "FLOGI");
  
  		/* Assume no Fabric and go on with discovery.
  		 * Check for outstanding ELS FLOGI to abort.
  		 */
  
  		/* FLOGI failed, so just use loop map to make discovery list */
  		lpfc_disc_list_loopmap(vport);
  
  		/* Start discovery */
  		lpfc_disc_start(vport);
  		break;
  
  	case LPFC_FABRIC_CFG_LINK:
  	/* hba_state is identically LPFC_FABRIC_CFG_LINK while waiting for
  	   NameServer login */
  		lpfc_printf_vlog(vport, KERN_ERR,
  				 LOG_TRACE_EVENT,
  				 "0223 Timeout while waiting for "
  				 "NameServer login\n");
  		/* Next look for NameServer ndlp */
  		ndlp = lpfc_findnode_did(vport, NameServer_DID);
  		if (ndlp)
  			lpfc_els_abort(phba, ndlp);
  
  		/* ReStart discovery */
  		goto restart_disc;
  
  	case LPFC_NS_QRY:
  	/* Check for wait for NameServer Rsp timeout */
  		lpfc_printf_vlog(vport, KERN_ERR,
  				 LOG_TRACE_EVENT,
  				 "0224 NameServer Query timeout "
  				 "Data: x%x x%x\n",
  				 vport->fc_ns_retry, LPFC_MAX_NS_RETRY);
  
  		if (vport->fc_ns_retry < LPFC_MAX_NS_RETRY) {
  			/* Try it one more time */
  			vport->fc_ns_retry++;
  			vport->gidft_inp = 0;
  			rc = lpfc_issue_gidft(vport);
  			if (rc == 0)
  				break;
  		}
  		vport->fc_ns_retry = 0;
  
  restart_disc:
  		/*
  		 * Discovery is over.
  		 * set port_state to PORT_READY if SLI2.
  		 * cmpl_reg_vpi will set port_state to READY for SLI3.
  		 */
  		if (phba->sli_rev < LPFC_SLI_REV4) {
  			if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
  				lpfc_issue_reg_vpi(phba, vport);
  			else  {
  				lpfc_issue_clear_la(phba, vport);
  				vport->port_state = LPFC_VPORT_READY;
  			}
  		}
  
  		/* Setup and issue mailbox INITIALIZE LINK command */
  		initlinkmbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  		if (!initlinkmbox) {
  			lpfc_printf_vlog(vport, KERN_ERR,
  					 LOG_TRACE_EVENT,
  					 "0206 Device Discovery "
  					 "completion error\n");
  			phba->link_state = LPFC_HBA_ERROR;
  			break;
  		}
  
  		lpfc_linkdown(phba);
  		lpfc_init_link(phba, initlinkmbox, phba->cfg_topology,
  			       phba->cfg_link_speed);
  		initlinkmbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
  		initlinkmbox->vport = vport;
  		initlinkmbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
  		rc = lpfc_sli_issue_mbox(phba, initlinkmbox, MBX_NOWAIT);
  		lpfc_set_loopback_flag(phba);
  		if (rc == MBX_NOT_FINISHED)
  			mempool_free(initlinkmbox, phba->mbox_mem_pool);
  
  		break;
  
  	case LPFC_DISC_AUTH:
  	/* Node Authentication timeout */
  		lpfc_printf_vlog(vport, KERN_ERR,
  				 LOG_TRACE_EVENT,
  				 "0227 Node Authentication timeout\n");
  		lpfc_disc_flush_list(vport);
  
  		/*
  		 * set port_state to PORT_READY if SLI2.
  		 * cmpl_reg_vpi will set port_state to READY for SLI3.
  		 */
  		if (phba->sli_rev < LPFC_SLI_REV4) {
  			if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
  				lpfc_issue_reg_vpi(phba, vport);
  			else  {	/* NPIV Not enabled */
  				lpfc_issue_clear_la(phba, vport);
  				vport->port_state = LPFC_VPORT_READY;
  			}
  		}
  		break;
  
  	case LPFC_VPORT_READY:
  		if (vport->fc_flag & FC_RSCN_MODE) {
  			lpfc_printf_vlog(vport, KERN_ERR,
  					 LOG_TRACE_EVENT,
  					 "0231 RSCN timeout Data: x%x "
  					 "x%x\n",
  					 vport->fc_ns_retry, LPFC_MAX_NS_RETRY);
  
  			/* Cleanup any outstanding ELS commands */
  			lpfc_els_flush_cmd(vport);
  
  			lpfc_els_flush_rscn(vport);
  			lpfc_disc_flush_list(vport);
  		}
  		break;
  
  	default:
  		lpfc_printf_vlog(vport, KERN_ERR,
  				 LOG_TRACE_EVENT,
  				 "0273 Unexpected discovery timeout, "
  				 "vport State x%x\n", vport->port_state);
  		break;
  	}
  
  	switch (phba->link_state) {
  	case LPFC_CLEAR_LA:
  				/* CLEAR LA timeout */
  		lpfc_printf_vlog(vport, KERN_ERR,
  				 LOG_TRACE_EVENT,
  				 "0228 CLEAR LA timeout\n");
  		clrlaerr = 1;
  		break;
  
  	case LPFC_LINK_UP:
  		lpfc_issue_clear_la(phba, vport);
  		fallthrough;
  	case LPFC_LINK_UNKNOWN:
  	case LPFC_WARM_START:
  	case LPFC_INIT_START:
  	case LPFC_INIT_MBX_CMDS:
  	case LPFC_LINK_DOWN:
  	case LPFC_HBA_ERROR:
  		lpfc_printf_vlog(vport, KERN_ERR,
  				 LOG_TRACE_EVENT,
  				 "0230 Unexpected timeout, hba link "
  				 "state x%x\n", phba->link_state);
  		clrlaerr = 1;
  		break;
  
  	case LPFC_HBA_READY:
  		break;
  	}
  
  	if (clrlaerr) {
  		lpfc_disc_flush_list(vport);
  		if (phba->sli_rev != LPFC_SLI_REV4) {
  			psli->sli3_ring[(LPFC_EXTRA_RING)].flag &=
  				~LPFC_STOP_IOCB_EVENT;
  			psli->sli3_ring[LPFC_FCP_RING].flag &=
  				~LPFC_STOP_IOCB_EVENT;
  		}
  		vport->port_state = LPFC_VPORT_READY;
  	}
  	return;
  }
  
  /*
   * This routine handles processing a NameServer REG_LOGIN mailbox
   * command upon completion. It is setup in the LPFC_MBOXQ
   * as the completion routine when the command is
   * handed off to the SLI layer.
   */
  void
  lpfc_mbx_cmpl_fdmi_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
  {
  	MAILBOX_t *mb = &pmb->u.mb;
  	struct lpfc_dmabuf   *mp = (struct lpfc_dmabuf *)(pmb->ctx_buf);
  	struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *)pmb->ctx_ndlp;
  	struct lpfc_vport    *vport = pmb->vport;
  
  	pmb->ctx_buf = NULL;
  	pmb->ctx_ndlp = NULL;
  
  	if (phba->sli_rev < LPFC_SLI_REV4)
  		ndlp->nlp_rpi = mb->un.varWords[0];
  	ndlp->nlp_flag |= NLP_RPI_REGISTERED;
  	ndlp->nlp_type |= NLP_FABRIC;
  	lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_DISCOVERY,
  			 "0004 rpi:%x DID:%x flg:%x %d x%px\n",
  			 ndlp->nlp_rpi, ndlp->nlp_DID, ndlp->nlp_flag,
  			 kref_read(&ndlp->kref),
  			 ndlp);
  	/*
  	 * Start issuing Fabric-Device Management Interface (FDMI) command to
  	 * 0xfffffa (FDMI well known port).
  	 * DHBA -> DPRT -> RHBA -> RPA  (physical port)
  	 * DPRT -> RPRT (vports)
  	 */
  	if (vport->port_type == LPFC_PHYSICAL_PORT)
  		lpfc_fdmi_cmd(vport, ndlp, SLI_MGMT_DHBA, 0);
  	else
  		lpfc_fdmi_cmd(vport, ndlp, SLI_MGMT_DPRT, 0);
  
  
  	/* decrement the node reference count held for this callback
  	 * function.
  	 */
  	lpfc_nlp_put(ndlp);
  	lpfc_mbuf_free(phba, mp->virt, mp->phys);
  	kfree(mp);
  	mempool_free(pmb, phba->mbox_mem_pool);
  
  	return;
  }
  
  static int
  lpfc_filter_by_rpi(struct lpfc_nodelist *ndlp, void *param)
  {
  	uint16_t *rpi = param;
  
  	return ndlp->nlp_rpi == *rpi;
  }
  
  static int
  lpfc_filter_by_wwpn(struct lpfc_nodelist *ndlp, void *param)
  {
  	return memcmp(&ndlp->nlp_portname, param,
  		      sizeof(ndlp->nlp_portname)) == 0;
  }
  
  static struct lpfc_nodelist *
  __lpfc_find_node(struct lpfc_vport *vport, node_filter filter, void *param)
  {
  	struct lpfc_nodelist *ndlp;
  
  	list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
  		if (filter(ndlp, param)) {
  			lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
  					 "3185 FIND node filter %ps DID "
  					 "ndlp x%px did x%x flg x%x st x%x "
  					 "xri x%x type x%x rpi x%x\n",
  					 filter, ndlp, ndlp->nlp_DID,
  					 ndlp->nlp_flag, ndlp->nlp_state,
  					 ndlp->nlp_xri, ndlp->nlp_type,
  					 ndlp->nlp_rpi);
  			return ndlp;
  		}
  	}
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
  			 "3186 FIND node filter %ps NOT FOUND.\n", filter);
  	return NULL;
  }
  
  /*
   * This routine looks up the ndlp lists for the given RPI. If rpi found it
   * returns the node list element pointer else return NULL.
   */
  struct lpfc_nodelist *
  __lpfc_findnode_rpi(struct lpfc_vport *vport, uint16_t rpi)
  {
  	return __lpfc_find_node(vport, lpfc_filter_by_rpi, &rpi);
  }
  
  /*
   * This routine looks up the ndlp lists for the given WWPN. If WWPN found it
   * returns the node element list pointer else return NULL.
   */
  struct lpfc_nodelist *
  lpfc_findnode_wwpn(struct lpfc_vport *vport, struct lpfc_name *wwpn)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_nodelist *ndlp;
  
  	spin_lock_irq(shost->host_lock);
  	ndlp = __lpfc_find_node(vport, lpfc_filter_by_wwpn, wwpn);
  	spin_unlock_irq(shost->host_lock);
  	return ndlp;
  }
  
  /*
   * This routine looks up the ndlp lists for the given RPI. If the rpi
   * is found, the routine returns the node element list pointer else
   * return NULL.
   */
  struct lpfc_nodelist *
  lpfc_findnode_rpi(struct lpfc_vport *vport, uint16_t rpi)
  {
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  	struct lpfc_nodelist *ndlp;
  	unsigned long flags;
  
  	spin_lock_irqsave(shost->host_lock, flags);
  	ndlp = __lpfc_findnode_rpi(vport, rpi);
  	spin_unlock_irqrestore(shost->host_lock, flags);
  	return ndlp;
  }
  
  /**
   * lpfc_find_vport_by_vpid - Find a vport on a HBA through vport identifier
   * @phba: pointer to lpfc hba data structure.
   * @vpi: the physical host virtual N_Port identifier.
   *
   * This routine finds a vport on a HBA (referred by @phba) through a
   * @vpi. The function walks the HBA's vport list and returns the address
   * of the vport with the matching @vpi.
   *
   * Return code
   *    NULL - No vport with the matching @vpi found
   *    Otherwise - Address to the vport with the matching @vpi.
   **/
  struct lpfc_vport *
  lpfc_find_vport_by_vpid(struct lpfc_hba *phba, uint16_t vpi)
  {
  	struct lpfc_vport *vport;
  	unsigned long flags;
  	int i = 0;
  
  	/* The physical ports are always vpi 0 - translate is unnecessary. */
  	if (vpi > 0) {
  		/*
  		 * Translate the physical vpi to the logical vpi.  The
  		 * vport stores the logical vpi.
  		 */
  		for (i = 0; i < phba->max_vpi; i++) {
  			if (vpi == phba->vpi_ids[i])
  				break;
  		}
  
  		if (i >= phba->max_vpi) {
  			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  					"2936 Could not find Vport mapped "
  					"to vpi %d\n", vpi);
  			return NULL;
  		}
  	}
  
  	spin_lock_irqsave(&phba->port_list_lock, flags);
  	list_for_each_entry(vport, &phba->port_list, listentry) {
  		if (vport->vpi == i) {
  			spin_unlock_irqrestore(&phba->port_list_lock, flags);
  			return vport;
  		}
  	}
  	spin_unlock_irqrestore(&phba->port_list_lock, flags);
  	return NULL;
  }
  
  struct lpfc_nodelist *
  lpfc_nlp_init(struct lpfc_vport *vport, uint32_t did)
  {
  	struct lpfc_nodelist *ndlp;
  	int rpi = LPFC_RPI_ALLOC_ERROR;
  
  	if (vport->phba->sli_rev == LPFC_SLI_REV4) {
  		rpi = lpfc_sli4_alloc_rpi(vport->phba);
  		if (rpi == LPFC_RPI_ALLOC_ERROR)
  			return NULL;
  	}
  
  	ndlp = mempool_alloc(vport->phba->nlp_mem_pool, GFP_KERNEL);
  	if (!ndlp) {
  		if (vport->phba->sli_rev == LPFC_SLI_REV4)
  			lpfc_sli4_free_rpi(vport->phba, rpi);
  		return NULL;
  	}
  
  	memset(ndlp, 0, sizeof (struct lpfc_nodelist));
  
  	spin_lock_init(&ndlp->lock);
  
  	lpfc_initialize_node(vport, ndlp, did);
  	INIT_LIST_HEAD(&ndlp->nlp_listp);
  	if (vport->phba->sli_rev == LPFC_SLI_REV4) {
  		ndlp->nlp_rpi = rpi;
  		lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_DISCOVERY,
  				 "0007 Init New ndlp x%px, rpi:x%x DID:%x "
  				 "flg:x%x refcnt:%d\n",
  				 ndlp, ndlp->nlp_rpi, ndlp->nlp_DID,
  				 ndlp->nlp_flag, kref_read(&ndlp->kref));
  
  		ndlp->active_rrqs_xri_bitmap =
  				mempool_alloc(vport->phba->active_rrq_pool,
  					      GFP_KERNEL);
  		if (ndlp->active_rrqs_xri_bitmap)
  			memset(ndlp->active_rrqs_xri_bitmap, 0,
  			       ndlp->phba->cfg_rrq_xri_bitmap_sz);
  	}
  
  
  
  	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
  		"node init:       did:x%x",
  		ndlp->nlp_DID, 0, 0);
  
  	return ndlp;
  }
  
  /* This routine releases all resources associated with a specifc NPort's ndlp
   * and mempool_free's the nodelist.
   */
  static void
  lpfc_nlp_release(struct kref *kref)
  {
  	struct lpfc_nodelist *ndlp = container_of(kref, struct lpfc_nodelist,
  						  kref);
  	struct lpfc_vport *vport = ndlp->vport;
  
  	lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
  		"node release:    did:x%x flg:x%x type:x%x",
  		ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
  
  	lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
  			"0279 %s: ndlp:%p did %x refcnt:%d rpi:%x\n",
  			 __func__, ndlp, ndlp->nlp_DID,
  			 kref_read(&ndlp->kref), ndlp->nlp_rpi);
  
  	/* remove ndlp from action. */
  	lpfc_cancel_retry_delay_tmo(vport, ndlp);
  	lpfc_cleanup_node(vport, ndlp);
  
  	/* Not all ELS transactions have registered the RPI with the port.
  	 * In these cases the rpi usage is temporary and the node is
  	 * released when the WQE is completed.  Catch this case to free the
  	 * RPI to the pool.  Because this node is in the release path, a lock
  	 * is unnecessary.  All references are gone and the node has been
  	 * dequeued.
  	 */
  	if (ndlp->nlp_flag & NLP_RELEASE_RPI) {
  		if (ndlp->nlp_rpi != LPFC_RPI_ALLOC_ERROR &&
  		    !(ndlp->nlp_flag & (NLP_RPI_REGISTERED | NLP_UNREG_INP))) {
  			lpfc_sli4_free_rpi(vport->phba, ndlp->nlp_rpi);
  			ndlp->nlp_rpi = LPFC_RPI_ALLOC_ERROR;
  		}
  	}
  
  	/* The node is not freed back to memory, it is released to a pool so
  	 * the node fields need to be cleaned up.
  	 */
  	ndlp->vport = NULL;
  	ndlp->nlp_state = NLP_STE_FREED_NODE;
  	ndlp->nlp_flag = 0;
  	ndlp->fc4_xpt_flags = 0;
  
  	/* free ndlp memory for final ndlp release */
  	kfree(ndlp->lat_data);
  	if (ndlp->phba->sli_rev == LPFC_SLI_REV4)
  		mempool_free(ndlp->active_rrqs_xri_bitmap,
  				ndlp->phba->active_rrq_pool);
  	mempool_free(ndlp, ndlp->phba->nlp_mem_pool);
  }
  
  /* This routine bumps the reference count for a ndlp structure to ensure
   * that one discovery thread won't free a ndlp while another discovery thread
   * is using it.
   */
  struct lpfc_nodelist *
  lpfc_nlp_get(struct lpfc_nodelist *ndlp)
  {
  	unsigned long flags;
  
  	if (ndlp) {
  		lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
  			"node get:        did:x%x flg:x%x refcnt:x%x",
  			ndlp->nlp_DID, ndlp->nlp_flag,
  			kref_read(&ndlp->kref));
  
  		/* The check of ndlp usage to prevent incrementing the
  		 * ndlp reference count that is in the process of being
  		 * released.
  		 */
  		spin_lock_irqsave(&ndlp->lock, flags);
  		if (!kref_get_unless_zero(&ndlp->kref)) {
  			spin_unlock_irqrestore(&ndlp->lock, flags);
  			lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_NODE,
  				"0276 %s: ndlp:x%px refcnt:%d\n",
  				__func__, (void *)ndlp, kref_read(&ndlp->kref));
  			return NULL;
  		}
  		spin_unlock_irqrestore(&ndlp->lock, flags);
  	} else {
  		WARN_ONCE(!ndlp, "**** %s, get ref on NULL ndlp!", __func__);
  	}
  
  	return ndlp;
  }
  
  /* This routine decrements the reference count for a ndlp structure. If the
   * count goes to 0, this indicates the associated nodelist should be freed.
   */
  int
  lpfc_nlp_put(struct lpfc_nodelist *ndlp)
  {
  	if (ndlp) {
  		lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
  				"node put:        did:x%x flg:x%x refcnt:x%x",
  				ndlp->nlp_DID, ndlp->nlp_flag,
  				kref_read(&ndlp->kref));
  	} else {
  		WARN_ONCE(!ndlp, "**** %s, put ref on NULL ndlp!", __func__);
  	}
  
  	return ndlp ? kref_put(&ndlp->kref, lpfc_nlp_release) : 0;
  }
  
  /* This routine free's the specified nodelist if it is not in use
   * by any other discovery thread. This routine returns 1 if the
   * ndlp has been freed. A return value of 0 indicates the ndlp is
   * not yet been released.
   */
  int
  lpfc_nlp_not_used(struct lpfc_nodelist *ndlp)
  {
  	lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
  		"node not used:   did:x%x flg:x%x refcnt:x%x",
  		ndlp->nlp_DID, ndlp->nlp_flag,
  		kref_read(&ndlp->kref));
  
  	if (kref_read(&ndlp->kref) == 1)
  		if (lpfc_nlp_put(ndlp))
  			return 1;
  	return 0;
  }
  
  /**
   * lpfc_fcf_inuse - Check if FCF can be unregistered.
   * @phba: Pointer to hba context object.
   *
   * This function iterate through all FC nodes associated
   * will all vports to check if there is any node with
   * fc_rports associated with it. If there is an fc_rport
   * associated with the node, then the node is either in
   * discovered state or its devloss_timer is pending.
   */
  static int
  lpfc_fcf_inuse(struct lpfc_hba *phba)
  {
  	struct lpfc_vport **vports;
  	int i, ret = 0;
  	struct lpfc_nodelist *ndlp;
  	struct Scsi_Host  *shost;
  
  	vports = lpfc_create_vport_work_array(phba);
  
  	/* If driver cannot allocate memory, indicate fcf is in use */
  	if (!vports)
  		return 1;
  
  	for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
  		shost = lpfc_shost_from_vport(vports[i]);
  		spin_lock_irq(shost->host_lock);
  		/*
  		 * IF the CVL_RCVD bit is not set then we have sent the
  		 * flogi.
  		 * If dev_loss fires while we are waiting we do not want to
  		 * unreg the fcf.
  		 */
  		if (!(vports[i]->fc_flag & FC_VPORT_CVL_RCVD)) {
  			spin_unlock_irq(shost->host_lock);
  			ret =  1;
  			goto out;
  		}
  		list_for_each_entry(ndlp, &vports[i]->fc_nodes, nlp_listp) {
  			if (ndlp->rport &&
  			  (ndlp->rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
  				ret = 1;
  				spin_unlock_irq(shost->host_lock);
  				goto out;
  			} else if (ndlp->nlp_flag & NLP_RPI_REGISTERED) {
  				ret = 1;
  				lpfc_printf_log(phba, KERN_INFO,
  						LOG_NODE | LOG_DISCOVERY,
  						"2624 RPI %x DID %x flag %x "
  						"still logged in\n",
  						ndlp->nlp_rpi, ndlp->nlp_DID,
  						ndlp->nlp_flag);
  			}
  		}
  		spin_unlock_irq(shost->host_lock);
  	}
  out:
  	lpfc_destroy_vport_work_array(phba, vports);
  	return ret;
  }
  
  /**
   * lpfc_unregister_vfi_cmpl - Completion handler for unreg vfi.
   * @phba: Pointer to hba context object.
   * @mboxq: Pointer to mailbox object.
   *
   * This function frees memory associated with the mailbox command.
   */
  void
  lpfc_unregister_vfi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
  {
  	struct lpfc_vport *vport = mboxq->vport;
  	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  
  	if (mboxq->u.mb.mbxStatus) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"2555 UNREG_VFI mbxStatus error x%x "
  				"HBA state x%x\n",
  				mboxq->u.mb.mbxStatus, vport->port_state);
  	}
  	spin_lock_irq(shost->host_lock);
  	phba->pport->fc_flag &= ~FC_VFI_REGISTERED;
  	spin_unlock_irq(shost->host_lock);
  	mempool_free(mboxq, phba->mbox_mem_pool);
  	return;
  }
  
  /**
   * lpfc_unregister_fcfi_cmpl - Completion handler for unreg fcfi.
   * @phba: Pointer to hba context object.
   * @mboxq: Pointer to mailbox object.
   *
   * This function frees memory associated with the mailbox command.
   */
  static void
  lpfc_unregister_fcfi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
  {
  	struct lpfc_vport *vport = mboxq->vport;
  
  	if (mboxq->u.mb.mbxStatus) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"2550 UNREG_FCFI mbxStatus error x%x "
  				"HBA state x%x\n",
  				mboxq->u.mb.mbxStatus, vport->port_state);
  	}
  	mempool_free(mboxq, phba->mbox_mem_pool);
  	return;
  }
  
  /**
   * lpfc_unregister_fcf_prep - Unregister fcf record preparation
   * @phba: Pointer to hba context object.
   *
   * This function prepare the HBA for unregistering the currently registered
   * FCF from the HBA. It performs unregistering, in order, RPIs, VPIs, and
   * VFIs.
   */
  int
  lpfc_unregister_fcf_prep(struct lpfc_hba *phba)
  {
  	struct lpfc_vport **vports;
  	struct lpfc_nodelist *ndlp;
  	struct Scsi_Host *shost;
  	int i = 0, rc;
  
  	/* Unregister RPIs */
  	if (lpfc_fcf_inuse(phba))
  		lpfc_unreg_hba_rpis(phba);
  
  	/* At this point, all discovery is aborted */
  	phba->pport->port_state = LPFC_VPORT_UNKNOWN;
  
  	/* Unregister VPIs */
  	vports = lpfc_create_vport_work_array(phba);
  	if (vports && (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED))
  		for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
  			/* Stop FLOGI/FDISC retries */
  			ndlp = lpfc_findnode_did(vports[i], Fabric_DID);
  			if (ndlp)
  				lpfc_cancel_retry_delay_tmo(vports[i], ndlp);
  			lpfc_cleanup_pending_mbox(vports[i]);
  			if (phba->sli_rev == LPFC_SLI_REV4)
  				lpfc_sli4_unreg_all_rpis(vports[i]);
  			lpfc_mbx_unreg_vpi(vports[i]);
  			shost = lpfc_shost_from_vport(vports[i]);
  			spin_lock_irq(shost->host_lock);
  			vports[i]->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
  			vports[i]->vpi_state &= ~LPFC_VPI_REGISTERED;
  			spin_unlock_irq(shost->host_lock);
  		}
  	lpfc_destroy_vport_work_array(phba, vports);
  	if (i == 0 && (!(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED))) {
  		ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
  		if (ndlp)
  			lpfc_cancel_retry_delay_tmo(phba->pport, ndlp);
  		lpfc_cleanup_pending_mbox(phba->pport);
  		if (phba->sli_rev == LPFC_SLI_REV4)
  			lpfc_sli4_unreg_all_rpis(phba->pport);
  		lpfc_mbx_unreg_vpi(phba->pport);
  		shost = lpfc_shost_from_vport(phba->pport);
  		spin_lock_irq(shost->host_lock);
  		phba->pport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
  		phba->pport->vpi_state &= ~LPFC_VPI_REGISTERED;
  		spin_unlock_irq(shost->host_lock);
  	}
  
  	/* Cleanup any outstanding ELS commands */
  	lpfc_els_flush_all_cmd(phba);
  
  	/* Unregister the physical port VFI */
  	rc = lpfc_issue_unreg_vfi(phba->pport);
  	return rc;
  }
  
  /**
   * lpfc_sli4_unregister_fcf - Unregister currently registered FCF record
   * @phba: Pointer to hba context object.
   *
   * This function issues synchronous unregister FCF mailbox command to HBA to
   * unregister the currently registered FCF record. The driver does not reset
   * the driver FCF usage state flags.
   *
   * Return 0 if successfully issued, none-zero otherwise.
   */
  int
  lpfc_sli4_unregister_fcf(struct lpfc_hba *phba)
  {
  	LPFC_MBOXQ_t *mbox;
  	int rc;
  
  	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
  	if (!mbox) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"2551 UNREG_FCFI mbox allocation failed"
  				"HBA state x%x\n", phba->pport->port_state);
  		return -ENOMEM;
  	}
  	lpfc_unreg_fcfi(mbox, phba->fcf.fcfi);
  	mbox->vport = phba->pport;
  	mbox->mbox_cmpl = lpfc_unregister_fcfi_cmpl;
  	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
  
  	if (rc == MBX_NOT_FINISHED) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"2552 Unregister FCFI command failed rc x%x "
  				"HBA state x%x\n",
  				rc, phba->pport->port_state);
  		return -EINVAL;
  	}
  	return 0;
  }
  
  /**
   * lpfc_unregister_fcf_rescan - Unregister currently registered fcf and rescan
   * @phba: Pointer to hba context object.
   *
   * This function unregisters the currently reigstered FCF. This function
   * also tries to find another FCF for discovery by rescan the HBA FCF table.
   */
  void
  lpfc_unregister_fcf_rescan(struct lpfc_hba *phba)
  {
  	int rc;
  
  	/* Preparation for unregistering fcf */
  	rc = lpfc_unregister_fcf_prep(phba);
  	if (rc) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"2748 Failed to prepare for unregistering "
  				"HBA's FCF record: rc=%d\n", rc);
  		return;
  	}
  
  	/* Now, unregister FCF record and reset HBA FCF state */
  	rc = lpfc_sli4_unregister_fcf(phba);
  	if (rc)
  		return;
  	/* Reset HBA FCF states after successful unregister FCF */
  	phba->fcf.fcf_flag = 0;
  	phba->fcf.current_rec.flag = 0;
  
  	/*
  	 * If driver is not unloading, check if there is any other
  	 * FCF record that can be used for discovery.
  	 */
  	if ((phba->pport->load_flag & FC_UNLOADING) ||
  	    (phba->link_state < LPFC_LINK_UP))
  		return;
  
  	/* This is considered as the initial FCF discovery scan */
  	spin_lock_irq(&phba->hbalock);
  	phba->fcf.fcf_flag |= FCF_INIT_DISC;
  	spin_unlock_irq(&phba->hbalock);
  
  	/* Reset FCF roundrobin bmask for new discovery */
  	lpfc_sli4_clear_fcf_rr_bmask(phba);
  
  	rc = lpfc_sli4_fcf_scan_read_fcf_rec(phba, LPFC_FCOE_FCF_GET_FIRST);
  
  	if (rc) {
  		spin_lock_irq(&phba->hbalock);
  		phba->fcf.fcf_flag &= ~FCF_INIT_DISC;
  		spin_unlock_irq(&phba->hbalock);
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"2553 lpfc_unregister_unused_fcf failed "
  				"to read FCF record HBA state x%x\n",
  				phba->pport->port_state);
  	}
  }
  
  /**
   * lpfc_unregister_fcf - Unregister the currently registered fcf record
   * @phba: Pointer to hba context object.
   *
   * This function just unregisters the currently reigstered FCF. It does not
   * try to find another FCF for discovery.
   */
  void
  lpfc_unregister_fcf(struct lpfc_hba *phba)
  {
  	int rc;
  
  	/* Preparation for unregistering fcf */
  	rc = lpfc_unregister_fcf_prep(phba);
  	if (rc) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"2749 Failed to prepare for unregistering "
  				"HBA's FCF record: rc=%d\n", rc);
  		return;
  	}
  
  	/* Now, unregister FCF record and reset HBA FCF state */
  	rc = lpfc_sli4_unregister_fcf(phba);
  	if (rc)
  		return;
  	/* Set proper HBA FCF states after successful unregister FCF */
  	spin_lock_irq(&phba->hbalock);
  	phba->fcf.fcf_flag &= ~FCF_REGISTERED;
  	spin_unlock_irq(&phba->hbalock);
  }
  
  /**
   * lpfc_unregister_unused_fcf - Unregister FCF if all devices are disconnected.
   * @phba: Pointer to hba context object.
   *
   * This function check if there are any connected remote port for the FCF and
   * if all the devices are disconnected, this function unregister FCFI.
   * This function also tries to use another FCF for discovery.
   */
  void
  lpfc_unregister_unused_fcf(struct lpfc_hba *phba)
  {
  	/*
  	 * If HBA is not running in FIP mode, if HBA does not support
  	 * FCoE, if FCF discovery is ongoing, or if FCF has not been
  	 * registered, do nothing.
  	 */
  	spin_lock_irq(&phba->hbalock);
  	if (!(phba->hba_flag & HBA_FCOE_MODE) ||
  	    !(phba->fcf.fcf_flag & FCF_REGISTERED) ||
  	    !(phba->hba_flag & HBA_FIP_SUPPORT) ||
  	    (phba->fcf.fcf_flag & FCF_DISCOVERY) ||
  	    (phba->pport->port_state == LPFC_FLOGI)) {
  		spin_unlock_irq(&phba->hbalock);
  		return;
  	}
  	spin_unlock_irq(&phba->hbalock);
  
  	if (lpfc_fcf_inuse(phba))
  		return;
  
  	lpfc_unregister_fcf_rescan(phba);
  }
  
  /**
   * lpfc_read_fcf_conn_tbl - Create driver FCF connection table.
   * @phba: Pointer to hba context object.
   * @buff: Buffer containing the FCF connection table as in the config
   *         region.
   * This function create driver data structure for the FCF connection
   * record table read from config region 23.
   */
  static void
  lpfc_read_fcf_conn_tbl(struct lpfc_hba *phba,
  	uint8_t *buff)
  {
  	struct lpfc_fcf_conn_entry *conn_entry, *next_conn_entry;
  	struct lpfc_fcf_conn_hdr *conn_hdr;
  	struct lpfc_fcf_conn_rec *conn_rec;
  	uint32_t record_count;
  	int i;
  
  	/* Free the current connect table */
  	list_for_each_entry_safe(conn_entry, next_conn_entry,
  		&phba->fcf_conn_rec_list, list) {
  		list_del_init(&conn_entry->list);
  		kfree(conn_entry);
  	}
  
  	conn_hdr = (struct lpfc_fcf_conn_hdr *) buff;
  	record_count = conn_hdr->length * sizeof(uint32_t)/
  		sizeof(struct lpfc_fcf_conn_rec);
  
  	conn_rec = (struct lpfc_fcf_conn_rec *)
  		(buff + sizeof(struct lpfc_fcf_conn_hdr));
  
  	for (i = 0; i < record_count; i++) {
  		if (!(conn_rec[i].flags & FCFCNCT_VALID))
  			continue;
  		conn_entry = kzalloc(sizeof(struct lpfc_fcf_conn_entry),
  			GFP_KERNEL);
  		if (!conn_entry) {
  			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  					"2566 Failed to allocate connection"
  					" table entry\n");
  			return;
  		}
  
  		memcpy(&conn_entry->conn_rec, &conn_rec[i],
  			sizeof(struct lpfc_fcf_conn_rec));
  		list_add_tail(&conn_entry->list,
  			&phba->fcf_conn_rec_list);
  	}
  
  	if (!list_empty(&phba->fcf_conn_rec_list)) {
  		i = 0;
  		list_for_each_entry(conn_entry, &phba->fcf_conn_rec_list,
  				    list) {
  			conn_rec = &conn_entry->conn_rec;
  			lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
  					"3345 FCF connection list rec[%02d]: "
  					"flags:x%04x, vtag:x%04x, "
  					"fabric_name:x%02x:%02x:%02x:%02x:"
  					"%02x:%02x:%02x:%02x, "
  					"switch_name:x%02x:%02x:%02x:%02x:"
  					"%02x:%02x:%02x:%02x\n", i++,
  					conn_rec->flags, conn_rec->vlan_tag,
  					conn_rec->fabric_name[0],
  					conn_rec->fabric_name[1],
  					conn_rec->fabric_name[2],
  					conn_rec->fabric_name[3],
  					conn_rec->fabric_name[4],
  					conn_rec->fabric_name[5],
  					conn_rec->fabric_name[6],
  					conn_rec->fabric_name[7],
  					conn_rec->switch_name[0],
  					conn_rec->switch_name[1],
  					conn_rec->switch_name[2],
  					conn_rec->switch_name[3],
  					conn_rec->switch_name[4],
  					conn_rec->switch_name[5],
  					conn_rec->switch_name[6],
  					conn_rec->switch_name[7]);
  		}
  	}
  }
  
  /**
   * lpfc_read_fcoe_param - Read FCoe parameters from conf region..
   * @phba: Pointer to hba context object.
   * @buff: Buffer containing the FCoE parameter data structure.
   *
   *  This function update driver data structure with config
   *  parameters read from config region 23.
   */
  static void
  lpfc_read_fcoe_param(struct lpfc_hba *phba,
  			uint8_t *buff)
  {
  	struct lpfc_fip_param_hdr *fcoe_param_hdr;
  	struct lpfc_fcoe_params *fcoe_param;
  
  	fcoe_param_hdr = (struct lpfc_fip_param_hdr *)
  		buff;
  	fcoe_param = (struct lpfc_fcoe_params *)
  		(buff + sizeof(struct lpfc_fip_param_hdr));
  
  	if ((fcoe_param_hdr->parm_version != FIPP_VERSION) ||
  		(fcoe_param_hdr->length != FCOE_PARAM_LENGTH))
  		return;
  
  	if (fcoe_param_hdr->parm_flags & FIPP_VLAN_VALID) {
  		phba->valid_vlan = 1;
  		phba->vlan_id = le16_to_cpu(fcoe_param->vlan_tag) &
  			0xFFF;
  	}
  
  	phba->fc_map[0] = fcoe_param->fc_map[0];
  	phba->fc_map[1] = fcoe_param->fc_map[1];
  	phba->fc_map[2] = fcoe_param->fc_map[2];
  	return;
  }
  
  /**
   * lpfc_get_rec_conf23 - Get a record type in config region data.
   * @buff: Buffer containing config region 23 data.
   * @size: Size of the data buffer.
   * @rec_type: Record type to be searched.
   *
   * This function searches config region data to find the beginning
   * of the record specified by record_type. If record found, this
   * function return pointer to the record else return NULL.
   */
  static uint8_t *
  lpfc_get_rec_conf23(uint8_t *buff, uint32_t size, uint8_t rec_type)
  {
  	uint32_t offset = 0, rec_length;
  
  	if ((buff[0] == LPFC_REGION23_LAST_REC) ||
  		(size < sizeof(uint32_t)))
  		return NULL;
  
  	rec_length = buff[offset + 1];
  
  	/*
  	 * One TLV record has one word header and number of data words
  	 * specified in the rec_length field of the record header.
  	 */
  	while ((offset + rec_length * sizeof(uint32_t) + sizeof(uint32_t))
  		<= size) {
  		if (buff[offset] == rec_type)
  			return &buff[offset];
  
  		if (buff[offset] == LPFC_REGION23_LAST_REC)
  			return NULL;
  
  		offset += rec_length * sizeof(uint32_t) + sizeof(uint32_t);
  		rec_length = buff[offset + 1];
  	}
  	return NULL;
  }
  
  /**
   * lpfc_parse_fcoe_conf - Parse FCoE config data read from config region 23.
   * @phba: Pointer to lpfc_hba data structure.
   * @buff: Buffer containing config region 23 data.
   * @size: Size of the data buffer.
   *
   * This function parses the FCoE config parameters in config region 23 and
   * populate driver data structure with the parameters.
   */
  void
  lpfc_parse_fcoe_conf(struct lpfc_hba *phba,
  		uint8_t *buff,
  		uint32_t size)
  {
  	uint32_t offset = 0;
  	uint8_t *rec_ptr;
  
  	/*
  	 * If data size is less than 2 words signature and version cannot be
  	 * verified.
  	 */
  	if (size < 2*sizeof(uint32_t))
  		return;
  
  	/* Check the region signature first */
  	if (memcmp(buff, LPFC_REGION23_SIGNATURE, 4)) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  			"2567 Config region 23 has bad signature\n");
  		return;
  	}
  
  	offset += 4;
  
  	/* Check the data structure version */
  	if (buff[offset] != LPFC_REGION23_VERSION) {
  		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
  				"2568 Config region 23 has bad version\n");
  		return;
  	}
  	offset += 4;
  
  	/* Read FCoE param record */
  	rec_ptr = lpfc_get_rec_conf23(&buff[offset],
  			size - offset, FCOE_PARAM_TYPE);
  	if (rec_ptr)
  		lpfc_read_fcoe_param(phba, rec_ptr);
  
  	/* Read FCF connection table */
  	rec_ptr = lpfc_get_rec_conf23(&buff[offset],
  		size - offset, FCOE_CONN_TBL_TYPE);
  	if (rec_ptr)
  		lpfc_read_fcf_conn_tbl(phba, rec_ptr);
  
  }
  