drivers/scsi/lpfc/lpfc_hbadisc.c

/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2017-2021 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 void lpfc_check_inactive_vmid(struct lpfc_hba *phba);
static void lpfc_check_vmid_qfpa_issue(struct lpfc_hba *phba);

static int
lpfc_valid_xpt_node(struct lpfc_nodelist *ndlp)
{
	if (ndlp->nlp_fc4_type ||
	    ndlp->nlp_type & NLP_FABRIC)
		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 x%px 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 x%px SID x%x\n",
		       __func__, rport, rport->scsi_target_id);
		return -EINVAL;
	}

	if (!ndlp->vport) {
		pr_err("**** %s: Null vport on ndlp x%px, DID x%x rport x%px "
		       "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 x%px 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;

	/* If there is a PLOGI in progress, and we are in a
	 * NLP_NPR_2B_DISC state, don't turn off the flag.
	 */
	if (ndlp->nlp_state != NLP_STE_PLOGI_ISSUE)
		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_check_inactive_vmid_one - VMID inactivity checker for a vport
 * @vport: Pointer to vport context object.
 *
 * This function checks for idle VMID entries related to a particular vport. If
 * found unused/idle, free them accordingly.
 **/
static void lpfc_check_inactive_vmid_one(struct lpfc_vport *vport)
{
	u16 keep;
	u32 difftime = 0, r, bucket;
	u64 *lta;
	int cpu;
	struct lpfc_vmid *vmp;

	write_lock(&vport->vmid_lock);

	if (!vport->cur_vmid_cnt)
		goto out;

	/* iterate through the table */
	hash_for_each(vport->hash_table, bucket, vmp, hnode) {
		keep = 0;
		if (vmp->flag & LPFC_VMID_REGISTERED) {
			/* check if the particular VMID is in use */
			/* for all available per cpu variable */
			for_each_possible_cpu(cpu) {
				/* if last access time is less than timeout */
				lta = per_cpu_ptr(vmp->last_io_time, cpu);
				if (!lta)
					continue;
				difftime = (jiffies) - (*lta);
				if ((vport->vmid_inactivity_timeout *
				     JIFFIES_PER_HR) > difftime) {
					keep = 1;
					break;
				}
			}

			/* if none of the cpus have been used by the vm, */
			/*  remove the entry if already registered */
			if (!keep) {
				/* mark the entry for deregistration */
				vmp->flag = LPFC_VMID_DE_REGISTER;
				write_unlock(&vport->vmid_lock);
				if (vport->vmid_priority_tagging)
					r = lpfc_vmid_uvem(vport, vmp, false);
				else
					r = lpfc_vmid_cmd(vport,
							  SLI_CTAS_DAPP_IDENT,
							  vmp);

				/* decrement number of active vms and mark */
				/* entry in slot as free */
				write_lock(&vport->vmid_lock);
				if (!r) {
					struct lpfc_vmid *ht = vmp;

					vport->cur_vmid_cnt--;
					ht->flag = LPFC_VMID_SLOT_FREE;
					free_percpu(ht->last_io_time);
					ht->last_io_time = NULL;
					hash_del(&ht->hnode);
				}
			}
		}
	}
 out:
	write_unlock(&vport->vmid_lock);
}

/**
 * lpfc_check_inactive_vmid - VMID inactivity checker
 * @phba: Pointer to hba context object.
 *
 * This function is called from the worker thread to determine if an entry in
 * the VMID table can be released since there was no I/O activity seen from that
 * particular VM for the specified time. When this happens, the entry in the
 * table is released and also the resources on the switch cleared.
 **/

static void lpfc_check_inactive_vmid(struct lpfc_hba *phba)
{
	struct lpfc_vport *vport;
	struct lpfc_vport **vports;
	int i;

	vports = lpfc_create_vport_work_array(phba);
	if (!vports)
		return;

	for (i = 0; i <= phba->max_vports; i++) {
		if ((!vports[i]) && (i == 0))
			vport = phba->pport;
		else
			vport = vports[i];
		if (!vport)
			break;

		lpfc_check_inactive_vmid_one(vport);
	}
	lpfc_destroy_vport_work_array(phba, vports);
}

/**
 * lpfc_check_nlp_post_devloss - Check to restore ndlp refcnt after devloss
 * @vport: Pointer to vport object.
 * @ndlp: Pointer to remote node object.
 *
 * If NLP_IN_RECOV_POST_DEV_LOSS flag was set due to outstanding recovery of
 * node during dev_loss_tmo processing, then this function restores the nlp_put
 * kref decrement from lpfc_dev_loss_tmo_handler.
 **/
void
lpfc_check_nlp_post_devloss(struct lpfc_vport *vport,
			    struct lpfc_nodelist *ndlp)
{
	unsigned long iflags;

	spin_lock_irqsave(&ndlp->lock, iflags);
	if (ndlp->save_flags & NLP_IN_RECOV_POST_DEV_LOSS) {
		ndlp->save_flags &= ~NLP_IN_RECOV_POST_DEV_LOSS;
		spin_unlock_irqrestore(&ndlp->lock, iflags);
		lpfc_nlp_get(ndlp);
		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY | LOG_NODE,
				 "8438 Devloss timeout reversed on DID x%x "
				 "refcnt %d ndlp %p flag x%x "
				 "port_state = x%x\n",
				 ndlp->nlp_DID, kref_read(&ndlp->kref), ndlp,
				 ndlp->nlp_flag, vport->port_state);
		spin_lock_irqsave(&ndlp->lock, iflags);
	}
	spin_unlock_irqrestore(&ndlp->lock, iflags);
}

/**
 * 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;
	bool recovering = false;
	struct fc_vport *fc_vport = NULL;
	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) {
		spin_lock_irqsave(&ndlp->lock, iflags);
		/* In massive vport configuration settings, it's possible
		 * dev_loss_tmo fired during node recovery.  So, check if
		 * fabric nodes are in discovery states outstanding.
		 */
		switch (ndlp->nlp_DID) {
		case Fabric_DID:
			fc_vport = vport->fc_vport;
			if (fc_vport &&
			    fc_vport->vport_state == FC_VPORT_INITIALIZING)
				recovering = true;
			break;
		case Fabric_Cntl_DID:
			if (ndlp->nlp_flag & NLP_REG_LOGIN_SEND)
				recovering = true;
			break;
		case FDMI_DID:
			fallthrough;
		case NameServer_DID:
			if (ndlp->nlp_state >= NLP_STE_PLOGI_ISSUE &&
			    ndlp->nlp_state <= NLP_STE_REG_LOGIN_ISSUE)
				recovering = true;
			break;
		}
		spin_unlock_irqrestore(&ndlp->lock, iflags);

		/* Mark an NLP_IN_RECOV_POST_DEV_LOSS flag to know if reversing
		 * the following lpfc_nlp_put is necessary after fabric node is
		 * recovered.
		 */
		if (recovering) {
			lpfc_printf_vlog(vport, KERN_INFO,
					 LOG_DISCOVERY | LOG_NODE,
					 "8436 Devloss timeout marked on "
					 "DID x%x refcnt %d ndlp %p "
					 "flag x%x port_state = x%x\n",
					 ndlp->nlp_DID, kref_read(&ndlp->kref),
					 ndlp, ndlp->nlp_flag,
					 vport->port_state);
			spin_lock_irqsave(&ndlp->lock, iflags);
			ndlp->save_flags |= NLP_IN_RECOV_POST_DEV_LOSS;
			spin_unlock_irqrestore(&ndlp->lock, iflags);
		} else if (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
			/* Fabric node fully recovered before this dev_loss_tmo
			 * queue work is processed.  Thus, ignore the
			 * dev_loss_tmo event.
			 */
			lpfc_printf_vlog(vport, KERN_INFO,
					 LOG_DISCOVERY | LOG_NODE,
					 "8437 Devloss timeout ignored on "
					 "DID x%x refcnt %d ndlp %p "
					 "flag x%x port_state = x%x\n",
					 ndlp->nlp_DID, kref_read(&ndlp->kref),
					 ndlp, ndlp->nlp_flag,
					 vport->port_state);
			return fcf_inuse;
		}

		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 we are devloss, but we are in the process of rediscovering the
	 * ndlp, don't issue a NLP_EVT_DEVICE_RM event.
	 */
	if (ndlp->nlp_state >= NLP_STE_PLOGI_ISSUE &&
	    ndlp->nlp_state <= NLP_STE_PRLI_ISSUE) {
		return fcf_inuse;
	}

	if (!(ndlp->fc4_xpt_flags & NVME_XPT_REGD))
		lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);

	return fcf_inuse;
}

static void lpfc_check_vmid_qfpa_issue(struct lpfc_hba *phba)
{
	struct lpfc_vport *vport;
	struct lpfc_vport **vports;
	int i;

	vports = lpfc_create_vport_work_array(phba);
	if (!vports)
		return;

	for (i = 0; i <= phba->max_vports; i++) {
		if ((!vports[i]) && (i == 0))
			vport = phba->pport;
		else
			vport = vports[i];
		if (!vport)
			break;

		if (vport->vmid_flag & LPFC_VMID_ISSUE_QFPA) {
			if (!lpfc_issue_els_qfpa(vport))
				vport->vmid_flag &= ~LPFC_VMID_ISSUE_QFPA;
		}
	}
	lpfc_destroy_vport_work_array(phba, vports);
}

/**
 * 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);

	/* Handle VMID Events */
	if (lpfc_is_vmid_enabled(phba)) {
		if (phba->pport->work_port_events &
		    WORKER_CHECK_VMID_ISSUE_QFPA) {
			lpfc_check_vmid_qfpa_issue(phba);
			phba->pport->work_port_events &=
				~WORKER_CHECK_VMID_ISSUE_QFPA;
		}
		if (phba->pport->work_port_events &
		    WORKER_CHECK_INACTIVE_VMID) {
			lpfc_check_inactive_vmid(phba);
			phba->pport->work_port_events &=
			    ~WORKER_CHECK_INACTIVE_VMID;
		}
	}

	/* 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) {
			/* It's possible the FLOGI to the fabric node never
			 * successfully completed and never registered with the
			 * transport.  In this case there is no way to clean up
			 * the node.
			 */
			if (ndlp->nlp_DID == Fabric_DID) {
				if (ndlp->nlp_prev_state ==
				    NLP_STE_UNUSED_NODE &&
				    !ndlp->fc4_xpt_flags)
					lpfc_nlp_put(ndlp);
			}
			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) ||
		      (ndlp->nlp_DID == Fabric_Cntl_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.
 *