/*******************************************************************
 * 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: