lpfc_hbadisc.c

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/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2012 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.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 <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_fc.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_scsi.h"
#include "lpfc.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 *);

void
lpfc_terminate_rport_io(struct fc_rport *rport)
{
    struct lpfc_rport_data *rdata;
    struct lpfc_nodelist * ndlp;
    struct lpfc_hba *phba;

    rdata = rport->dd_data;
    ndlp = rdata->pnode;

    if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
        if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
            printk(KERN_ERR "Cannot find remote node"
            " to terminate I/O Data x%x\n",
            rport->port_id);
        return;
    }

    phba  = ndlp->phba;

    lpfc_debugfs_disc_trc(ndlp->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(ndlp->vport,
            &phba->sli.ring[phba->sli.fcp_ring],
            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_rport_data *rdata;
    struct lpfc_nodelist * ndlp;
    struct lpfc_vport *vport;
    struct lpfc_hba   *phba;
    struct lpfc_work_evt *evtp;
    int  put_node;
    int  put_rport;

    rdata = rport->dd_data;
    ndlp = rdata->pnode;
    if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
        return;

    vport = ndlp->vport;
    phba  = vport->phba;

    lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
        "rport devlosscb: sid:x%x did:x%x flg:x%x",
        ndlp->nlp_sid, ndlp->nlp_DID, ndlp->nlp_flag);

    lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
             "3181 dev_loss_callbk x%06x, rport %p flg x%x\n",
             ndlp->nlp_DID, ndlp->rport, ndlp->nlp_flag);

    /* Don't defer this if we are in the process of deleting the vport
     * or unloading the driver. The unload will cleanup the node
     * appropriately we just need to cleanup the ndlp rport info here.
     */
    if (vport->load_flag & FC_UNLOADING) {
        put_node = rdata->pnode != NULL;
        put_rport = ndlp->rport != NULL;
        rdata->pnode = NULL;
        ndlp->rport = NULL;
        if (put_node)
            lpfc_nlp_put(ndlp);
        if (put_rport)
            put_device(&rport->dev);
        return;
    }

    if (ndlp->nlp_state == NLP_STE_MAPPED_NODE)
        return;

    if (ndlp->nlp_type & NLP_FABRIC) {

        /* If the WWPN of the rport and ndlp don't match, ignore it */
        if (rport->port_name != wwn_to_u64(ndlp->nlp_portname.u.wwn)) {
            put_device(&rport->dev);
            return;
        }
    }

    evtp = &ndlp->dev_loss_evt;

    if (!list_empty(&evtp->evt_listp))
        return;

    spin_lock_irq(&phba->hbalock);
    /* We need to hold the node by incrementing the reference
     * count until this queued work is done
     */
    evtp->evt_arg1  = lpfc_nlp_get(ndlp);
    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_irq(&phba->hbalock);

    return;
}

static int
lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp)
{
    struct lpfc_rport_data *rdata;
    struct fc_rport   *rport;
    struct lpfc_vport *vport;
    struct lpfc_hba   *phba;
    uint8_t *name;
    int  put_node;
    int  put_rport;
    int warn_on = 0;
    int fcf_inuse = 0;

    rport = ndlp->rport;

    if (!rport)
        return fcf_inuse;

    rdata = rport->dd_data;
    name = (uint8_t *) &ndlp->nlp_portname;
    vport = ndlp->vport;
    phba  = vport->phba;

    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, rport->scsi_target_id);

    lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
             "3182 dev_loss_tmo_handler x%06x, rport %p flg x%x\n",
             ndlp->nlp_DID, ndlp->rport, ndlp->nlp_flag);

    /* Don't defer this if we are in the process of deleting the vport
     * or unloading the driver. The unload will cleanup the node
     * appropriately we just need to cleanup the ndlp rport info here.
     */
    if (vport->load_flag & FC_UNLOADING) {
        if (ndlp->nlp_sid != NLP_NO_SID) {
            /* flush the target */
            lpfc_sli_abort_iocb(vport,
                    &phba->sli.ring[phba->sli.fcp_ring],
                    ndlp->nlp_sid, 0, LPFC_CTX_TGT);
        }
        put_node = rdata->pnode != NULL;
        put_rport = ndlp->rport != NULL;
        rdata->pnode = NULL;
        ndlp->rport = NULL;
        if (put_node)
            lpfc_nlp_put(ndlp);
        if (put_rport)
            put_device(&rport->dev);
        return fcf_inuse;
    }

    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;
    }

    if (ndlp->nlp_type & NLP_FABRIC) {
        /* We will clean up these Nodes in linkup */
        put_node = rdata->pnode != NULL;
        put_rport = ndlp->rport != NULL;
        rdata->pnode = NULL;
        ndlp->rport = NULL;
        if (put_node)
            lpfc_nlp_put(ndlp);
        if (put_rport)
            put_device(&rport->dev);
        return fcf_inuse;
    }

    if (ndlp->nlp_sid != NLP_NO_SID) {
        warn_on = 1;
        /* flush the target */
        lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
                    ndlp->nlp_sid, 0, LPFC_CTX_TGT);
    }

    if (warn_on) {
        lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
                 "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_DISCOVERY,
                 "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);
    }

    put_node = rdata->pnode != NULL;
    put_rport = ndlp->rport != NULL;
    rdata->pnode = NULL;
    ndlp->rport = NULL;
    if (put_node)
        lpfc_nlp_put(ndlp);
    if (put_rport)
        put_device(&rport->dev);

    if (!(vport->load_flag & FC_UNLOADING) &&
        !(ndlp->nlp_flag & NLP_DELAY_TMO) &&
        !(ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
        (ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
        (ndlp->nlp_state != NLP_STE_REG_LOGIN_ISSUE) &&
        (ndlp->nlp_state != NLP_STE_PRLI_ISSUE))
        lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);

    return fcf_inuse;
}

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);
}

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;
}

void
lpfc_free_fast_evt(struct lpfc_hba *phba,
        struct lpfc_fast_path_event *evt) {

    atomic_dec(&phba->fast_event_count);
    kfree(evt);
}

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;
    }

    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_ONLINE:
            if (phba->link_state < LPFC_LINK_DOWN)
                *(int *) (evtp->evt_arg1) = lpfc_online(phba);
            else
                *(int *) (evtp->evt_arg1) = 0;
            complete((struct completion *)(evtp->evt_arg2));
            break;
        case LPFC_EVT_OFFLINE_PREP:
            if (phba->link_state >= LPFC_LINK_DOWN)
                lpfc_offline_prep(phba, LPFC_MBX_WAIT);
            *(int *)(evtp->evt_arg1) = 0;
            complete((struct completion *)(evtp->evt_arg2));
            break;
        case LPFC_EVT_OFFLINE:
            lpfc_offline(phba);
            lpfc_sli_brdrestart(phba);
            *(int *)(evtp->evt_arg1) =
                lpfc_sli_brdready(phba, HS_FFRDY | HS_MBRDY);
            lpfc_unblock_mgmt_io(phba);
            complete((struct completion *)(evtp->evt_arg2));
            break;
        case LPFC_EVT_WARM_START:
            lpfc_offline(phba);
            lpfc_reset_barrier(phba);
            lpfc_sli_brdreset(phba);
            lpfc_hba_down_post(phba);
            *(int *)(evtp->evt_arg1) =
                lpfc_sli_brdready(phba, HS_MBRDY);
            lpfc_unblock_mgmt_io(phba);
            complete((struct completion *)(evtp->evt_arg2));
            break;
        case LPFC_EVT_KILL:
            lpfc_offline(phba);
            *(int *)(evtp->evt_arg1)
                = (phba->pport->stopped)
                        ? 0 : lpfc_sli_brdkill(phba);
            lpfc_unblock_mgmt_io(phba);
            complete((struct completion *)(evtp->evt_arg2));
            break;
        case LPFC_EVT_FASTPATH_MGMT_EVT:
            lpfc_send_fastpath_evt(phba, evtp);
            free_evt = 0;
            break;
        case LPFC_EVT_RESET_HBA:
            if (!(phba->pport->load_flag & FC_UNLOADING))
                lpfc_reset_hba(phba);
            break;
        }
        if (free_evt)
            kfree(evtp);
        spin_lock_irq(&phba->hbalock);
    }
    spin_unlock_irq(&phba->hbalock);

}

static void
lpfc_work_done(struct lpfc_hba *phba)
{
    struct lpfc_sli_ring *pring;
    uint32_t ha_copy, status, control, work_port_events;
    struct lpfc_vport **vports;
    struct lpfc_vport *vport;
    int i;

    spin_lock_irq(&phba->hbalock);
    ha_copy = phba->work_ha;
    phba->work_ha = 0;
    spin_unlock_irq(&phba->hbalock);

    /* First, try to post the next mailbox command to SLI4 device */
    if (phba->pci_dev_grp == LPFC_PCI_DEV_OC)
        lpfc_sli4_post_async_mbox(phba);

    if (ha_copy & HA_ERATT)
        /* Handle the error attention event */
        lpfc_handle_eratt(phba);

    if (ha_copy & HA_MBATT)
        lpfc_sli_handle_mb_event(phba);

    if (ha_copy & HA_LATT)
        lpfc_handle_latt(phba);

    /* Process SLI4 events */
    if (phba->pci_dev_grp == LPFC_PCI_DEV_OC) {
        if (phba->hba_flag & HBA_RRQ_ACTIVE)
            lpfc_handle_rrq_active(phba);
        if (phba->hba_flag & FCP_XRI_ABORT_EVENT)
            lpfc_sli4_fcp_xri_abort_event_proc(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_FDMI_TMO)
                lpfc_fdmi_timeout_handler(vport);
            if (work_port_events & WORKER_RAMP_DOWN_QUEUE)
                lpfc_ramp_down_queue_handler(phba);
            if (work_port_events & WORKER_RAMP_UP_QUEUE)
                lpfc_ramp_up_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 = &phba->sli.ring[LPFC_ELS_RING];
    status = (ha_copy & (HA_RXMASK  << (4*LPFC_ELS_RING)));
    status >>= (4*LPFC_ELS_RING);
    if ((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;
            /* Set the lpfc data pending flag */
            set_bit(LPFC_DATA_READY, &phba->data_flags);
        } else {
            pring->flag &= ~LPFC_DEFERRED_RING_EVENT;
            lpfc_sli_handle_slow_ring_event(phba, pring,
                            (status &
                             HA_RXMASK));
        }
        if ((phba->sli_rev == LPFC_SLI_REV4) && pring->txq_cnt)
            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, -20);
    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_ELS,
                    "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;
    int  rc;

    list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
        if (!NLP_CHK_NODE_ACT(ndlp))
            continue;
        if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
            continue;
        if ((phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) ||
            ((vport->port_type == LPFC_NPIV_PORT) &&
            (ndlp->nlp_DID == NameServer_DID)))
            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;
        rc = 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);

    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);

    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;
        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]);
        }
    lpfc_destroy_vport_work_array(phba, vports);
    /* Clean up any firmware default rpi's */
    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);
        }
    }

    /* Setup myDID for link up if we are in pt2pt mode */
    if (phba->pport->fc_flag & FC_PT2PT) {
        phba->pport->fc_myDID = 0;
        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);
        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) {
        if (!NLP_CHK_NODE_ACT(ndlp))
            continue;
        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;

    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);

    if (vport->fc_flag & FC_LBIT)
        lpfc_linkup_cleanup_nodes(vport);

}

static int
lpfc_linkup(struct lpfc_hba *phba)
{
    struct lpfc_vport **vports;
    int i;

    lpfc_cleanup_wt_rrqs(phba);
    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);
    if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
        (phba->sli_rev < LPFC_SLI_REV4))
        lpfc_issue_clear_la(phba, phba->pport);

    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.
 */
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->ring[psli->extra_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
    psli->ring[psli->fcp_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
    psli->ring[psli->next_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_MBOX,
                 "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;
}


static void
lpfc_mbx_cmpl_local_config_link(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
    struct lpfc_vport *vport = pmb->vport;

    if (pmb->u.mb.mbxStatus)
        goto out;

    mempool_free(pmb, phba->mbox_mem_pool);

    /* 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 || vport->fc_flag & FC_PT2PT_PLOGI)
        lpfc_initial_flogi(vport);
    return;

out:
    lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
             "0306 CONFIG_LINK mbxStatus error x%x "
             "HBA state x%x\n",
             pmb->u.mb.mbxStatus, vport->port_state);
    mempool_free(pmb, phba->mbox_mem_pool);

    lpfc_linkdown(phba);

    lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
             "0200 CONFIG_LINK bad hba state x%x\n",
             vport->port_state);

    lpfc_issue_clear_la(phba, vport);
    return;
}

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_MBOX,
             "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);
}

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;
}

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;
}

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);
}

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;

}

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);
}

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)
{
    /* 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);
}

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->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;
}

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;
}

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;
}

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 & random32());

    /* Decision with probability 1/fcf_cnt */
    if ((fcf_cnt * rand_num) < 0xFFFF)
        return true;
    else
        return false;
}

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;
    dma_addr_t phys_addr;
    struct lpfc_mbx_sge sge;
    struct lpfc_mbx_read_fcf_tbl *read_fcf;
    uint32_t shdr_status, shdr_add_status;
    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);
    phys_addr = getPaddr(sge.pa_hi, sge.pa_lo);
    if (unlikely(!mboxq->sge_array)) {
        lpfc_printf_log(phba, KERN_ERR, LOG_MBOX,
                "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;
    shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
    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)
            lpfc_printf_log(phba, KERN_ERR, LOG_FIP,
                    "2726 READ_FCF_RECORD Indicates empty "
                    "FCF table.\n");
        else
            lpfc_printf_log(phba, KERN_ERR, LOG_FIP,
                    "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;
}

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);
}

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;
}

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;
        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;
}

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);
}

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);
}

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;
}

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;
    uint32_t seed;
    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_FIP,
                "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_FIP,
                    "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)\n",
                        phba->fcf.current_rec.fcf_indx);
                goto out;
            } else
                lpfc_printf_log(phba, KERN_ERR, LOG_FIP,
                    "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;
        /* Seeding the random number generator for random selection */
        seed = (uint32_t)(0xFFFFFFFF & jiffies);
        srandom32(seed);
    }
    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;
}

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.\n");
        goto error_out;
    }

    /* Get the needed parameters from FCF record */
    rc = lpfc_match_fcf_conn_list(phba, new_fcf_record, &boot_flag,
                      &addr_mode, &vlan_id);

    /* Log the FCF record information if turned on */
    lpfc_sli4_log_fcf_record_info(phba, new_fcf_record, vlan_id,
                      next_fcf_index);

    fcf_index = bf_get(lpfc_fcf_record_fcf_index, new_fcf_record);
    if (!rc) {
        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                "2848 Remove ineligible FCF (x%x) from "
                "from roundrobin bmask\n", fcf_index);
        /* Clear roundrobin bmask bit for ineligible FCF */
        lpfc_sli4_fcf_rr_index_clear(phba, fcf_index);
        /* Perform next round of roundrobin FCF failover */
        fcf_index = lpfc_sli4_fcf_rr_next_index_get(phba);
        rc = lpfc_sli4_fcf_rr_next_proc(phba->pport, fcf_index);
        if (rc)
            goto out;
        goto error_out;
    }

    if (fcf_index == phba->fcf.current_rec.fcf_indx) {
        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                "2760 Perform FLOGI roundrobin FCF failover: "
                "FCF (x%x) back to FCF (x%x)\n",
                phba->fcf.current_rec.fcf_indx, fcf_index);
        /* Wait 500 ms before retrying FLOGI to current FCF */
        msleep(500);
        lpfc_issue_init_vfi(phba->pport);
        goto out;
    }

    /* Upload new FCF record to the failover FCF record */
    lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
            "2834 Update current FCF (x%x) with new FCF (x%x)\n",
            phba->fcf.failover_rec.fcf_indx, fcf_index);
    spin_lock_irq(&phba->hbalock);
    __lpfc_update_fcf_record(phba, &phba->fcf.failover_rec,
                 new_fcf_record, addr_mode, vlan_id,
                 (boot_flag ? BOOT_ENABLE : 0));
    spin_unlock_irq(&phba->hbalock);

    current_fcf_index = phba->fcf.current_rec.fcf_indx;

    /* Unregister the current in-use FCF record */
    lpfc_unregister_fcf(phba);

    /* Replace in-use record with the new record */
    memcpy(&phba->fcf.current_rec, &phba->fcf.failover_rec,
           sizeof(struct lpfc_fcf_rec));

    lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
            "2783 Perform FLOGI roundrobin FCF failover: FCF "
            "(x%x) to FCF (x%x)\n", current_fcf_index, fcf_index);

error_out:
    lpfc_register_fcf(phba);
out:
    lpfc_sli4_mbox_cmd_free(phba, mboxq);
}

void
lpfc_mbx_cmpl_read_fcf_rec(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
    struct fcf_record *new_fcf_record;
    uint32_t boot_flag, addr_mode;
    uint16_t fcf_index, next_fcf_index;
    uint16_t vlan_id;
    int rc;

    /* If link state is not up, no need to proceed */
    if (phba->link_state < LPFC_LINK_UP)
        goto out;

    /* If FCF discovery period is over, no need to proceed */
    if (!(phba->fcf.fcf_flag & FCF_DISCOVERY))
        goto out;

    /* Parse the FCF record from the non-embedded mailbox command */
    new_fcf_record = lpfc_sli4_fcf_rec_mbox_parse(phba, mboxq,
                              &next_fcf_index);
    if (!new_fcf_record) {
        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                "2767 Mailbox command READ_FCF_RECORD "
                "failed to retrieve a FCF record.\n");
        goto out;
    }

    /* Check the connection list for eligibility */
    rc = lpfc_match_fcf_conn_list(phba, new_fcf_record, &boot_flag,
                      &addr_mode, &vlan_id);

    /* Log the FCF record information if turned on */
    lpfc_sli4_log_fcf_record_info(phba, new_fcf_record, vlan_id,
                      next_fcf_index);

    if (!rc)
        goto out;

    /* Update the eligible FCF record index bmask */
    fcf_index = bf_get(lpfc_fcf_record_fcf_index, new_fcf_record);

    rc = lpfc_sli4_fcf_pri_list_add(phba, fcf_index, new_fcf_record);

out:
    lpfc_sli4_mbox_cmd_free(phba, mboxq);
}

void
lpfc_init_vfi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
    struct lpfc_vport *vport = mboxq->vport;

    /*
     * VFI not supported on interface type 0, just do the flogi
     * Also continue if the VFI is in use - just use the same one.
     */
    if (mboxq->u.mb.mbxStatus &&
        (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) !=
            LPFC_SLI_INTF_IF_TYPE_0) &&
        mboxq->u.mb.mbxStatus != MBX_VFI_IN_USE) {
        lpfc_printf_vlog(vport, KERN_ERR,
                LOG_MBOX,
                "2891 Init VFI mailbox failed 0x%x\n",
                mboxq->u.mb.mbxStatus);
        mempool_free(mboxq, phba->mbox_mem_pool);
        lpfc_vport_set_state(vport, FC_VPORT_FAILED);
        return;
    }

    lpfc_initial_flogi(vport);
    mempool_free(mboxq, phba->mbox_mem_pool);
    return;
}

void
lpfc_issue_init_vfi(struct lpfc_vport *vport)
{
    LPFC_MBOXQ_t *mboxq;
    int rc;
    struct lpfc_hba *phba = vport->phba;

    mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
    if (!mboxq) {
        lpfc_printf_vlog(vport, KERN_ERR,
            LOG_MBOX, "2892 Failed to allocate "
            "init_vfi mailbox\n");
        return;
    }
    lpfc_init_vfi(mboxq, vport);
    mboxq->mbox_cmpl = lpfc_init_vfi_cmpl;
    rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
    if (rc == MBX_NOT_FINISHED) {
        lpfc_printf_vlog(vport, KERN_ERR,
            LOG_MBOX, "2893 Failed to issue init_vfi mailbox\n");
        mempool_free(mboxq, vport->phba->mbox_mem_pool);
    }
}

void
lpfc_init_vpi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
    struct lpfc_vport *vport = mboxq->vport;
    struct lpfc_nodelist *ndlp;
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);

    if (mboxq->u.mb.mbxStatus) {
        lpfc_printf_vlog(vport, KERN_ERR,
                LOG_MBOX,
                "2609 Init VPI mailbox failed 0x%x\n",
                mboxq->u.mb.mbxStatus);
        mempool_free(mboxq, phba->mbox_mem_pool);
        lpfc_vport_set_state(vport, FC_VPORT_FAILED);
        return;
    }
    spin_lock_irq(shost->host_lock);
    vport->fc_flag &= ~FC_VPORT_NEEDS_INIT_VPI;
    spin_unlock_irq(shost->host_lock);

    /* If this port is physical port or FDISC is done, do reg_vpi */
    if ((phba->pport == vport) || (vport->port_state == LPFC_FDISC)) {
            ndlp = lpfc_findnode_did(vport, Fabric_DID);
            if (!ndlp)
                lpfc_printf_vlog(vport, KERN_ERR,
                    LOG_DISCOVERY,
                    "2731 Cannot find fabric "
                    "controller node\n");
            else
                lpfc_register_new_vport(phba, vport, ndlp);
            mempool_free(mboxq, phba->mbox_mem_pool);
            return;
    }

    if (phba->link_flag & LS_NPIV_FAB_SUPPORTED)
        lpfc_initial_fdisc(vport);
    else {
        lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
        lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
                 "2606 No NPIV Fabric support\n");
    }
    mempool_free(mboxq, phba->mbox_mem_pool);
    return;
}

void
lpfc_issue_init_vpi(struct lpfc_vport *vport)
{
    LPFC_MBOXQ_t *mboxq;
    int rc;

    mboxq = mempool_alloc(vport->phba->mbox_mem_pool, GFP_KERNEL);
    if (!mboxq) {
        lpfc_printf_vlog(vport, KERN_ERR,
            LOG_MBOX, "2607 Failed to allocate "
            "init_vpi mailbox\n");
        return;
    }
    lpfc_init_vpi(vport->phba, mboxq, vport->vpi);
    mboxq->vport = vport;
    mboxq->mbox_cmpl = lpfc_init_vpi_cmpl;
    rc = lpfc_sli_issue_mbox(vport->phba, mboxq, MBX_NOWAIT);
    if (rc == MBX_NOT_FINISHED) {
        lpfc_printf_vlog(vport, KERN_ERR,
            LOG_MBOX, "2608 Failed to issue init_vpi mailbox\n");
        mempool_free(mboxq, vport->phba->mbox_mem_pool);
    }
}

void
lpfc_start_fdiscs(struct lpfc_hba *phba)
{
    struct lpfc_vport **vports;
    int i;

    vports = lpfc_create_vport_work_array(phba);
    if (vports != NULL) {
        for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
            if (vports[i]->port_type == LPFC_PHYSICAL_PORT)
                continue;
            /* There are no vpi for this vport */
            if (vports[i]->vpi > phba->max_vpi) {
                lpfc_vport_set_state(vports[i],
                             FC_VPORT_FAILED);
                continue;
            }
            if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
                lpfc_vport_set_state(vports[i],
                             FC_VPORT_LINKDOWN);
                continue;
            }
            if (vports[i]->fc_flag & FC_VPORT_NEEDS_INIT_VPI) {
                lpfc_issue_init_vpi(vports[i]);
                continue;
            }
            if (phba->link_flag & LS_NPIV_FAB_SUPPORTED)
                lpfc_initial_fdisc(vports[i]);
            else {
                lpfc_vport_set_state(vports[i],
                             FC_VPORT_NO_FABRIC_SUPP);
                lpfc_printf_vlog(vports[i], KERN_ERR,
                         LOG_ELS,
                         "0259 No NPIV "
                         "Fabric support\n");
            }
        }
    }
    lpfc_destroy_vport_work_array(phba, vports);
}

void
lpfc_mbx_cmpl_reg_vfi(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
    struct lpfc_dmabuf *dmabuf = mboxq->context1;
    struct lpfc_vport *vport = mboxq->vport;
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);

    /*
     * VFI not supported for interface type 0, so ignore any mailbox
     * error (except VFI in use) and continue with the discovery.
     */
    if (mboxq->u.mb.mbxStatus &&
        (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) !=
            LPFC_SLI_INTF_IF_TYPE_0) &&
        mboxq->u.mb.mbxStatus != MBX_VFI_IN_USE) {
        lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
             "2018 REG_VFI mbxStatus error x%x "
             "HBA state x%x\n",
             mboxq->u.mb.mbxStatus, vport->port_state);
        if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
            /* FLOGI failed, use loop map to make discovery list */
            lpfc_disc_list_loopmap(vport);
            /* Start discovery */
            lpfc_disc_start(vport);
            goto out_free_mem;
        }
        lpfc_vport_set_state(vport, FC_VPORT_FAILED);
        goto out_free_mem;
    }
    /* The VPI is implicitly registered when the VFI is registered */
    spin_lock_irq(shost->host_lock);
    vport->vpi_state |= LPFC_VPI_REGISTERED;
    vport->fc_flag |= FC_VFI_REGISTERED;
    vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
    vport->fc_flag &= ~FC_VPORT_NEEDS_INIT_VPI;
    spin_unlock_irq(shost->host_lock);

    /* In case SLI4 FC loopback test, we are ready */
    if ((phba->sli_rev == LPFC_SLI_REV4) &&
        (phba->link_flag & LS_LOOPBACK_MODE)) {
        phba->link_state = LPFC_HBA_READY;
        goto out_free_mem;
    }

    if (vport->port_state == LPFC_FABRIC_CFG_LINK) {
        /*
         * For private loop or for NPort pt2pt,
         * just start discovery and we are done.
         */
        if ((vport->fc_flag & FC_PT2PT) ||
            ((phba->fc_topology == LPFC_TOPOLOGY_LOOP) &&
            !(vport->fc_flag & FC_PUBLIC_LOOP))) {

            /* Use loop map to make discovery list */
            lpfc_disc_list_loopmap(vport);
            /* Start discovery */
            lpfc_disc_start(vport);
        } else {
            lpfc_start_fdiscs(phba);
            lpfc_do_scr_ns_plogi(phba, vport);
        }
    }

out_free_mem:
    mempool_free(mboxq, phba->mbox_mem_pool);
    lpfc_mbuf_free(phba, dmabuf->virt, dmabuf->phys);
    kfree(dmabuf);
    return;
}

static void
lpfc_mbx_cmpl_read_sparam(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
    MAILBOX_t *mb = &pmb->u.mb;
    struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) pmb->context1;
    struct lpfc_vport  *vport = pmb->vport;


    /* Check for error */
    if (mb->mbxStatus) {
        /* READ_SPARAM mbox error <mbxStatus> state <hba_state> */
        lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
                 "0319 READ_SPARAM mbxStatus error x%x "
                 "hba state x%x>\n",
                 mb->mbxStatus, vport->port_state);
        lpfc_linkdown(phba);
        goto out;
    }

    memcpy((uint8_t *) &vport->fc_sparam, (uint8_t *) mp->virt,
           sizeof (struct serv_parm));
    lpfc_update_vport_wwn(vport);
    if (vport->port_type == LPFC_PHYSICAL_PORT) {
        memcpy(&phba->wwnn, &vport->fc_nodename, sizeof(phba->wwnn));
        memcpy(&phba->wwpn, &vport->fc_portname, sizeof(phba->wwnn));
    }

    lpfc_mbuf_free(phba, mp->virt, mp->phys);
    kfree(mp);
    mempool_free(pmb, phba->mbox_mem_pool);
    return;

out:
    pmb->context1 = NULL;
    lpfc_mbuf_free(phba, mp->virt, mp->phys);
    kfree(mp);
    lpfc_issue_clear_la(phba, vport);
    mempool_free(pmb, phba->mbox_mem_pool);
    return;
}

static void
lpfc_mbx_process_link_up(struct lpfc_hba *phba, struct lpfc_mbx_read_top *la)
{
    struct lpfc_vport *vport = phba->pport;
    LPFC_MBOXQ_t *sparam_mbox, *cfglink_mbox = NULL;
    struct Scsi_Host *shost;
    int i;
    struct lpfc_dmabuf *mp;
    int rc;
    struct fcf_record *fcf_record;

    spin_lock_irq(&phba->hbalock);
    switch (bf_get(lpfc_mbx_read_top_link_spd, la)) {
    case LPFC_LINK_SPEED_1GHZ:
    case LPFC_LINK_SPEED_2GHZ:
    case LPFC_LINK_SPEED_4GHZ:
    case LPFC_LINK_SPEED_8GHZ:
    case LPFC_LINK_SPEED_10GHZ:
    case LPFC_LINK_SPEED_16GHZ:
        phba->fc_linkspeed = bf_get(lpfc_mbx_read_top_link_spd, la);
        break;
    default:
        phba->fc_linkspeed = LPFC_LINK_SPEED_UNKNOWN;
        break;
    }

    phba->fc_topology = bf_get(lpfc_mbx_read_top_topology, la);
    phba->link_flag &= ~LS_NPIV_FAB_SUPPORTED;

    shost = lpfc_shost_from_vport(vport);
    if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
        phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;

        /* if npiv is enabled and this adapter supports npiv log
         * a message that npiv is not supported in this topology
         */
        if (phba->cfg_enable_npiv && phba->max_vpi)
            lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
                "1309 Link Up Event npiv not supported in loop "
                "topology\n");
                /* Get Loop Map information */
        if (bf_get(lpfc_mbx_read_top_il, la)) {
            spin_lock(shost->host_lock);
            vport->fc_flag |= FC_LBIT;
            spin_unlock(shost->host_lock);
        }

        vport->fc_myDID = bf_get(lpfc_mbx_read_top_alpa_granted, la);
        i = la->lilpBde64.tus.f.bdeSize;

        if (i == 0) {
            phba->alpa_map[0] = 0;
        } else {
            if (vport->cfg_log_verbose & LOG_LINK_EVENT) {
                int numalpa, j, k;
                union {
                    uint8_t pamap[16];
                    struct {
                        uint32_t wd1;
                        uint32_t wd2;
                        uint32_t wd3;
                        uint32_t wd4;
                    } pa;
                } un;
                numalpa = phba->alpa_map[0];
                j = 0;
                while (j < numalpa) {
                    memset(un.pamap, 0, 16);
                    for (k = 1; j < numalpa; k++) {
                        un.pamap[k - 1] =
                            phba->alpa_map[j + 1];
                        j++;
                        if (k == 16)
                            break;
                    }
                    /* Link Up Event ALPA map */
                    lpfc_printf_log(phba,
                            KERN_WARNING,
                            LOG_LINK_EVENT,
                            "1304 Link Up Event "
                            "ALPA map Data: x%x "
                            "x%x x%x x%x\n",
                            un.pa.wd1, un.pa.wd2,
                            un.pa.wd3, un.pa.wd4);
                }
            }
        }
    } else {
        if (!(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)) {
            if (phba->max_vpi && phba->cfg_enable_npiv &&
               (phba->sli_rev >= LPFC_SLI_REV3))
                phba->sli3_options |= LPFC_SLI3_NPIV_ENABLED;
        }
        vport->fc_myDID = phba->fc_pref_DID;
        spin_lock(shost->host_lock);
        vport->fc_flag |= FC_LBIT;
        spin_unlock(shost->host_lock);
    }
    spin_unlock_irq(&phba->hbalock);

    lpfc_linkup(phba);
    sparam_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
    if (!sparam_mbox)
        goto out;

    rc = lpfc_read_sparam(phba, sparam_mbox, 0);
    if (rc) {
        mempool_free(sparam_mbox, phba->mbox_mem_pool);
        goto out;
    }
    sparam_mbox->vport = vport;
    sparam_mbox->mbox_cmpl = lpfc_mbx_cmpl_read_sparam;
    rc = lpfc_sli_issue_mbox(phba, sparam_mbox, MBX_NOWAIT);
    if (rc == MBX_NOT_FINISHED) {
        mp = (struct lpfc_dmabuf *) sparam_mbox->context1;
        lpfc_mbuf_free(phba, mp->virt, mp->phys);
        kfree(mp);
        mempool_free(sparam_mbox, phba->mbox_mem_pool);
        goto out;
    }

    if (!(phba->hba_flag & HBA_FCOE_MODE)) {
        cfglink_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!cfglink_mbox)
            goto out;
        vport->port_state = LPFC_LOCAL_CFG_LINK;
        lpfc_config_link(phba, cfglink_mbox);
        cfglink_mbox->vport = vport;
        cfglink_mbox->mbox_cmpl = lpfc_mbx_cmpl_local_config_link;
        rc = lpfc_sli_issue_mbox(phba, cfglink_mbox, MBX_NOWAIT);
        if (rc == MBX_NOT_FINISHED) {
            mempool_free(cfglink_mbox, phba->mbox_mem_pool);
            goto out;
        }
    } else {
        vport->port_state = LPFC_VPORT_UNKNOWN;
        /*
         * Add the driver's default FCF record at FCF index 0 now. This
         * is phase 1 implementation that support FCF index 0 and driver
         * defaults.
         */
        if (!(phba->hba_flag & HBA_FIP_SUPPORT)) {
            fcf_record = kzalloc(sizeof(struct fcf_record),
                    GFP_KERNEL);
            if (unlikely(!fcf_record)) {
                lpfc_printf_log(phba, KERN_ERR,
                    LOG_MBOX | LOG_SLI,
                    "2554 Could not allocate memory for "
                    "fcf record\n");
                rc = -ENODEV;
                goto out;
            }

            lpfc_sli4_build_dflt_fcf_record(phba, fcf_record,
                        LPFC_FCOE_FCF_DEF_INDEX);
            rc = lpfc_sli4_add_fcf_record(phba, fcf_record);
            if (unlikely(rc)) {
                lpfc_printf_log(phba, KERN_ERR,
                    LOG_MBOX | LOG_SLI,
                    "2013 Could not manually add FCF "
                    "record 0, status %d\n", rc);
                rc = -ENODEV;
                kfree(fcf_record);
                goto out;
            }
            kfree(fcf_record);
        }
        /*
         * The driver is expected to do FIP/FCF. Call the port
         * and get the FCF Table.
         */
        spin_lock_irq(&phba->hbalock);
        if (phba->hba_flag & FCF_TS_INPROG) {
            spin_unlock_irq(&phba->hbalock);
            return;
        }
        /* This is the initial FCF discovery scan */
        phba->fcf.fcf_flag |= FCF_INIT_DISC;
        spin_unlock_irq(&phba->hbalock);
        lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
                "2778 Start FCF table scan at linkup\n");
        rc = lpfc_sli4_fcf_scan_read_fcf_rec(phba,
                             LPFC_FCOE_FCF_GET_FIRST);
        if (rc) {
            spin_lock_irq(&phba->hbalock);
            phba->fcf.fcf_flag &= ~FCF_INIT_DISC;
            spin_unlock_irq(&phba->hbalock);
            goto out;
        }
        /* Reset FCF roundrobin bmask for new discovery */
        lpfc_sli4_clear_fcf_rr_bmask(phba);
    }

    return;
out:
    lpfc_vport_set_state(vport, FC_VPORT_FAILED);
    lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
             "0263 Discovery Mailbox error: state: 0x%x : %p %p\n",
             vport->port_state, sparam_mbox, cfglink_mbox);
    lpfc_issue_clear_la(phba, vport);
    return;
}

static void
lpfc_enable_la(struct lpfc_hba *phba)
{
    uint32_t control;
    struct lpfc_sli *psli = &phba->sli;
    spin_lock_irq(&phba->hbalock);
    psli->sli_flag |= LPFC_PROCESS_LA;
    if (phba->sli_rev <= LPFC_SLI_REV3) {
        control = readl(phba->HCregaddr);
        control |= HC_LAINT_ENA;
        writel(control, phba->HCregaddr);
        readl(phba->HCregaddr); /* flush */
    }
    spin_unlock_irq(&phba->hbalock);
}

static void
lpfc_mbx_issue_link_down(struct lpfc_hba *phba)
{
    lpfc_linkdown(phba);
    lpfc_enable_la(phba);
    lpfc_unregister_unused_fcf(phba);
    /* turn on Link Attention interrupts - no CLEAR_LA needed */
}


/*
 * This routine handles processing a READ_TOPOLOGY mailbox
 * command upon completion. It is setup in the LPFC_MBOXQ
 * as the completion routine when the command is
 * handed off to the SLI layer.
 */
void
lpfc_mbx_cmpl_read_topology(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
    struct lpfc_vport *vport = pmb->vport;
    struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
    struct lpfc_mbx_read_top *la;
    MAILBOX_t *mb = &pmb->u.mb;
    struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);

    /* Unblock ELS traffic */
    phba->sli.ring[LPFC_ELS_RING].flag &= ~LPFC_STOP_IOCB_EVENT;
    /* Check for error */
    if (mb->mbxStatus) {
        lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
                "1307 READ_LA mbox error x%x state x%x\n",
                mb->mbxStatus, vport->port_state);
        lpfc_mbx_issue_link_down(phba);
        phba->link_state = LPFC_HBA_ERROR;
        goto lpfc_mbx_cmpl_read_topology_free_mbuf;
    }

    la = (struct lpfc_mbx_read_top *) &pmb->u.mb.un.varReadTop;

    memcpy(&phba->alpa_map[0], mp->virt, 128);

    spin_lock_irq(shost->host_lock);
    if (bf_get(lpfc_mbx_read_top_pb, la))
        vport->fc_flag |= FC_BYPASSED_MODE;
    else
        vport->fc_flag &= ~FC_BYPASSED_MODE;
    spin_unlock_irq(shost->host_lock);

    if ((phba->fc_eventTag  < la->eventTag) ||
        (phba->fc_eventTag == la->eventTag)) {
        phba->fc_stat.LinkMultiEvent++;
        if (bf_get(lpfc_mbx_read_top_att_type, la) == LPFC_ATT_LINK_UP)
            if (phba->fc_eventTag != 0)
                lpfc_linkdown(phba);
    }

    phba->fc_eventTag = la->eventTag;
    spin_lock_irq(&phba->hbalock);
    if (bf_get(lpfc_mbx_read_top_mm, la))
        phba->sli.sli_flag |= LPFC_MENLO_MAINT;
    else
        phba->sli.sli_flag &= ~LPFC_MENLO_MAINT;
    spin_unlock_irq(&phba->hbalock);

    phba->link_events++;
    if ((bf_get(lpfc_mbx_read_top_att_type, la) == LPFC_ATT_LINK_UP) &&
        (!bf_get(lpfc_mbx_read_top_mm, la))) {
        phba->fc_stat.LinkUp++;
        if (phba->link_flag & LS_LOOPBACK_MODE) {
            lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
                    "1306 Link Up Event in loop back mode "
                    "x%x received Data: x%x x%x x%x x%x\n",
                    la->eventTag, phba->fc_eventTag,
                    bf_get(lpfc_mbx_read_top_alpa_granted,
                           la),
                    bf_get(lpfc_mbx_read_top_link_spd, la),
                    phba->alpa_map[0]);
        } else {
            lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
                    "1303 Link Up Event x%x received "
                    "Data: x%x x%x x%x x%x x%x x%x %d\n",
                    la->eventTag, phba->fc_eventTag,
                    bf_get(lpfc_mbx_read_top_alpa_granted,
                           la),
                    bf_get(lpfc_mbx_read_top_link_spd, la),
                    phba->alpa_map[0],
                    bf_get(lpfc_mbx_read_top_mm, la),
                    bf_get(lpfc_mbx_read_top_fa, la),
                    phba->wait_4_mlo_maint_flg);
        }
        lpfc_mbx_process_link_up(phba, la);
    } else if (bf_get(lpfc_mbx_read_top_att_type, la) ==
           LPFC_ATT_LINK_DOWN) {
        phba->fc_stat.LinkDown++;
        if (phba->link_flag & LS_LOOPBACK_MODE)
            lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
                "1308 Link Down Event in loop back mode "
                "x%x received "
                "Data: x%x x%x x%x\n",
                la->eventTag, phba->fc_eventTag,
                phba->pport->port_state, vport->fc_flag);
        else
            lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
                "1305 Link Down Event x%x received "
                "Data: x%x x%x x%x x%x x%x\n",
                la->eventTag, phba->fc_eventTag,
                phba->pport->port_state, vport->fc_flag,
                bf_get(lpfc_mbx_read_top_mm, la),
                bf_get(lpfc_mbx_read_top_fa, la));
        lpfc_mbx_issue_link_down(phba);
    }
    if ((bf_get(lpfc_mbx_read_top_mm, la)) &&
        (bf_get(lpfc_mbx_read_top_att_type, la) == LPFC_ATT_LINK_UP)) {
        if (phba->link_state != LPFC_LINK_DOWN) {
            phba->fc_stat.LinkDown++;
            lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
                "1312 Link Down Event x%x received "
                "Data: x%x x%x x%x\n",
                la->eventTag, phba->fc_eventTag,
                phba->pport->port_state, vport->fc_flag);
            lpfc_mbx_issue_link_down(phba);
        } else
            lpfc_enable_la(phba);

        lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
                "1310 Menlo Maint Mode Link up Event x%x rcvd "
                "Data: x%x x%x x%x\n",
                la->eventTag, phba->fc_eventTag,
                phba->pport->port_state, vport->fc_flag);
        /*
         * The cmnd that triggered this will be waiting for this
         * signal.
         */
        /* WAKEUP for MENLO_SET_MODE or MENLO_RESET command. */
        if (phba->wait_4_mlo_maint_flg) {
            phba->wait_4_mlo_maint_flg = 0;
            wake_up_interruptible(&phba->wait_4_mlo_m_q);
        }
    }

    if (bf_get(lpfc_mbx_read_top_fa, la)) {
        if (bf_get(lpfc_mbx_read_top_mm, la))
            lpfc_issue_clear_la(phba, vport);
        lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
                "1311 fa %d\n",
                bf_get(lpfc_mbx_read_top_fa, la));
    }

lpfc_mbx_cmpl_read_topology_free_mbuf:
    lpfc_mbuf_free(phba, mp->virt, mp->phys);
    kfree(mp);
    mempool_free(pmb, phba->mbox_mem_pool);
    return;
}

/*
 * This routine handles processing a REG_LOGIN mailbox
 * command upon completion. It is setup in the LPFC_MBOXQ
 * as the completion routine when the command is
 * handed off to the SLI layer.
 */
void
lpfc_mbx_cmpl_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
    struct lpfc_vport  *vport = pmb->vport;
    struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
    struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
    struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);

    pmb->context1 = NULL;
    pmb->context2 = NULL;

    if (ndlp->nlp_flag & NLP_REG_LOGIN_SEND)
        ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;

    if (ndlp->nlp_flag & NLP_IGNR_REG_CMPL ||
        ndlp->nlp_state != NLP_STE_REG_LOGIN_ISSUE) {
        /* We rcvd a rscn after issuing this
         * mbox reg login, we may have cycled
         * back through the state and be
         * back at reg login state so this
         * mbox needs to be ignored becase
         * there is another reg login in
         * process.
         */
        spin_lock_irq(shost->host_lock);
        ndlp->nlp_flag &= ~NLP_IGNR_REG_CMPL;
        spin_unlock_irq(shost->host_lock);
    } else
        /* Good status, call state machine */
        lpfc_disc_state_machine(vport, ndlp, pmb,
                NLP_EVT_CMPL_REG_LOGIN);

    lpfc_mbuf_free(phba, mp->virt, mp->phys);
    kfree(mp);
    mempool_free(pmb, phba->mbox_mem_pool);
    /* decrement the node reference count held for this callback
     * function.
     */
    lpfc_nlp_put(ndlp);

    return;
}

static void
lpfc_mbx_cmpl_unreg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
    MAILBOX_t *mb = &pmb->u.mb;
    struct lpfc_vport *vport = pmb->vport;
    struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);

    switch (mb->mbxStatus) {
    case 0x0011:
    case 0x0020:
        lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
                 "0911 cmpl_unreg_vpi, mb status = 0x%x\n",
                 mb->mbxStatus);
        break;
    /* If VPI is busy, reset the HBA */
    case 0x9700:
        lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
            "2798 Unreg_vpi failed vpi 0x%x, mb status = 0x%x\n",
            vport->vpi, mb->mbxStatus);
        if (!(phba->pport->load_flag & FC_UNLOADING))
            lpfc_workq_post_event(phba, NULL, NULL,
                LPFC_EVT_RESET_HBA);
    }
    spin_lock_irq(shost->host_lock);
    vport->vpi_state &= ~LPFC_VPI_REGISTERED;
    vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
    spin_unlock_irq(shost->host_lock);
    vport->unreg_vpi_cmpl = VPORT_OK;
    mempool_free(pmb, phba->mbox_mem_pool);
    lpfc_cleanup_vports_rrqs(vport, NULL);
    /*
     * This shost reference might have been taken at the beginning of
     * lpfc_vport_delete()
     */
    if ((vport->load_flag & FC_UNLOADING) && (vport != phba->pport))
        scsi_host_put(shost);
}

int
lpfc_mbx_unreg_vpi(struct lpfc_vport *vport)
{
    struct lpfc_hba  *phba = vport->phba;
    LPFC_MBOXQ_t *mbox;
    int rc;

    mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
    if (!mbox)
        return 1;

    lpfc_unreg_vpi(phba, vport->vpi, mbox);
    mbox->vport = vport;
    mbox->mbox_cmpl = lpfc_mbx_cmpl_unreg_vpi;
    rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
    if (rc == MBX_NOT_FINISHED) {
        lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
                 "1800 Could not issue unreg_vpi\n");
        mempool_free(mbox, phba->mbox_mem_pool);
        vport->unreg_vpi_cmpl = VPORT_ERROR;
        return rc;
    }
    return 0;
}

static void
lpfc_mbx_cmpl_reg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
    struct lpfc_vport *vport = pmb->vport;
    struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
    MAILBOX_t *mb = &pmb->u.mb;

    switch (mb->mbxStatus) {
    case 0x0011:
    case 0x9601:
    case 0x9602:
        lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
                 "0912 cmpl_reg_vpi, mb status = 0x%x\n",
                 mb->mbxStatus);
        lpfc_vport_set_state(vport, FC_VPORT_FAILED);
        spin_lock_irq(shost->host_lock);
        vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
        spin_unlock_irq(shost->host_lock);
        vport->fc_myDID = 0;
        goto out;
    }

    spin_lock_irq(shost->host_lock);
    vport->vpi_state |= LPFC_VPI_REGISTERED;
    vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
    spin_unlock_irq(shost->host_lock);
    vport->num_disc_nodes = 0;
    /* go thru NPR list and issue ELS PLOGIs */
    if (vport->fc_npr_cnt)
        lpfc_els_disc_plogi(vport);

    if (!vport->num_disc_nodes) {
        spin_lock_irq(shost->host_lock);
        vport->fc_flag &= ~FC_NDISC_ACTIVE;
        spin_unlock_irq(shost->host_lock);
        lpfc_can_disctmo(vport);
    }
    vport->port_state = LPFC_VPORT_READY;

out:
    mempool_free(pmb, phba->mbox_mem_pool);
    return;
}

void
lpfc_create_static_vport(struct lpfc_hba *phba)
{
    LPFC_MBOXQ_t *pmb = NULL;
    MAILBOX_t *mb;
    struct static_vport_info *vport_info;
    int mbx_wait_rc = 0, i;
    struct fc_vport_identifiers vport_id;
    struct fc_vport *new_fc_vport;
    struct Scsi_Host *shost;
    struct lpfc_vport *vport;
    uint16_t offset = 0;
    uint8_t *vport_buff;
    struct lpfc_dmabuf *mp;
    uint32_t byte_count = 0;

    pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
    if (!pmb) {
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                "0542 lpfc_create_static_vport failed to"
                " allocate mailbox memory\n");
        return;
    }
    memset(pmb, 0, sizeof(LPFC_MBOXQ_t));
    mb = &pmb->u.mb;

    vport_info = kzalloc(sizeof(struct static_vport_info), GFP_KERNEL);
    if (!vport_info) {
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                "0543 lpfc_create_static_vport failed to"
                " allocate vport_info\n");
        mempool_free(pmb, phba->mbox_mem_pool);
        return;
    }

    vport_buff = (uint8_t *) vport_info;
    do {
        /* free dma buffer from previous round */
        if (pmb->context1) {
            mp = (struct lpfc_dmabuf *)pmb->context1;
            lpfc_mbuf_free(phba, mp->virt, mp->phys);
            kfree(mp);
        }
        if (lpfc_dump_static_vport(phba, pmb, offset))
            goto out;

        pmb->vport = phba->pport;
        mbx_wait_rc = lpfc_sli_issue_mbox_wait(phba, pmb,
                            LPFC_MBOX_TMO);

        if ((mbx_wait_rc != MBX_SUCCESS) || mb->mbxStatus) {
            lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                "0544 lpfc_create_static_vport failed to"
                " issue dump mailbox command ret 0x%x "
                "status 0x%x\n",
                mbx_wait_rc, mb->mbxStatus);
            goto out;
        }

        if (phba->sli_rev == LPFC_SLI_REV4) {
            byte_count = pmb->u.mqe.un.mb_words[5];
            mp = (struct lpfc_dmabuf *)pmb->context1;
            if (byte_count > sizeof(struct static_vport_info) -
                    offset)
                byte_count = sizeof(struct static_vport_info)
                    - offset;
            memcpy(vport_buff + offset, mp->virt, byte_count);
            offset += byte_count;
        } else {
            if (mb->un.varDmp.word_cnt >
                sizeof(struct static_vport_info) - offset)
                mb->un.varDmp.word_cnt =
                    sizeof(struct static_vport_info)
                        - offset;
            byte_count = mb->un.varDmp.word_cnt;
            lpfc_sli_pcimem_bcopy(((uint8_t *)mb) + DMP_RSP_OFFSET,
                vport_buff + offset,
                byte_count);

            offset += byte_count;
        }

    } while (byte_count &&
        offset < sizeof(struct static_vport_info));


    if ((le32_to_cpu(vport_info->signature) != VPORT_INFO_SIG) ||
        ((le32_to_cpu(vport_info->rev) & VPORT_INFO_REV_MASK)
            != VPORT_INFO_REV)) {
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
            "0545 lpfc_create_static_vport bad"
            " information header 0x%x 0x%x\n",
            le32_to_cpu(vport_info->signature),
            le32_to_cpu(vport_info->rev) & VPORT_INFO_REV_MASK);

        goto out;
    }

    shost = lpfc_shost_from_vport(phba->pport);

    for (i = 0; i < MAX_STATIC_VPORT_COUNT; i++) {
        memset(&vport_id, 0, sizeof(vport_id));
        vport_id.port_name = wwn_to_u64(vport_info->vport_list[i].wwpn);
        vport_id.node_name = wwn_to_u64(vport_info->vport_list[i].wwnn);
        if (!vport_id.port_name || !vport_id.node_name)
            continue;

        vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
        vport_id.vport_type = FC_PORTTYPE_NPIV;
        vport_id.disable = false;
        new_fc_vport = fc_vport_create(shost, 0, &vport_id);

        if (!new_fc_vport) {
            lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                "0546 lpfc_create_static_vport failed to"
                " create vport\n");
            continue;
        }

        vport = *(struct lpfc_vport **)new_fc_vport->dd_data;
        vport->vport_flag |= STATIC_VPORT;
    }

out:
    kfree(vport_info);
    if (mbx_wait_rc != MBX_TIMEOUT) {
        if (pmb->context1) {
            mp = (struct lpfc_dmabuf *)pmb->context1;
            lpfc_mbuf_free(phba, mp->virt, mp->phys);
            kfree(mp);
        }
        mempool_free(pmb, phba->mbox_mem_pool);
    }

    return;
}

/*
 * This routine handles processing a Fabric REG_LOGIN mailbox
 * command upon completion. It is setup in the LPFC_MBOXQ
 * as the completion routine when the command is
 * handed off to the SLI layer.
 */
void
lpfc_mbx_cmpl_fabric_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
    struct lpfc_vport *vport = pmb->vport;
    MAILBOX_t *mb = &pmb->u.mb;
    struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
    struct lpfc_nodelist *ndlp;
    struct Scsi_Host *shost;

    ndlp = (struct lpfc_nodelist *) pmb->context2;
    pmb->context1 = NULL;
    pmb->context2 = NULL;

    if (mb->mbxStatus) {
        lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
                 "0258 Register Fabric login error: 0x%x\n",
                 mb->mbxStatus);
        lpfc_mbuf_free(phba, mp->virt, mp->phys);
        kfree(mp);
        mempool_free(pmb, phba->mbox_mem_pool);

        if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
            /* FLOGI failed, use loop map to make discovery list */
            lpfc_disc_list_loopmap(vport);

            /* Start discovery */
            lpfc_disc_start(vport);
            /* Decrement the reference count to ndlp after the
             * reference to the ndlp are done.
             */
            lpfc_nlp_put(ndlp);
            return;
        }

        lpfc_vport_set_state(vport, FC_VPORT_FAILED);
        /* Decrement the reference count to ndlp after the reference
         * to the ndlp are done.
         */
        lpfc_nlp_put(ndlp);
        return;
    }

    if (phba->sli_rev < LPFC_SLI_REV4)
        ndlp->nlp_rpi = mb->un.varWords[0];
    ndlp->nlp_flag |= NLP_RPI_REGISTERED;
    ndlp->nlp_type |= NLP_FABRIC;
    lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);

    if (vport->port_state == LPFC_FABRIC_CFG_LINK) {
        /* when physical port receive logo donot start
         * vport discovery */
        if (!(vport->fc_flag & FC_LOGO_RCVD_DID_CHNG))
            lpfc_start_fdiscs(phba);
        else {
            shost = lpfc_shost_from_vport(vport);
            spin_lock_irq(shost->host_lock);
            vport->fc_flag &= ~FC_LOGO_RCVD_DID_CHNG ;
            spin_unlock_irq(shost->host_lock);
        }
        lpfc_do_scr_ns_plogi(phba, vport);
    }

    lpfc_mbuf_free(phba, mp->virt, mp->phys);
    kfree(mp);
    mempool_free(pmb, phba->mbox_mem_pool);

    /* Drop the reference count from the mbox at the end after
     * all the current reference to the ndlp have been done.
     */
    lpfc_nlp_put(ndlp);
    return;
}

/*
 * This routine handles processing a NameServer REG_LOGIN mailbox
 * command upon completion. It is setup in the LPFC_MBOXQ
 * as the completion routine when the command is
 * handed off to the SLI layer.
 */
void
lpfc_mbx_cmpl_ns_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
    MAILBOX_t *mb = &pmb->u.mb;
    struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
    struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
    struct lpfc_vport *vport = pmb->vport;

    pmb->context1 = NULL;
    pmb->context2 = NULL;

    if (mb->mbxStatus) {
out:
        lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
                 "0260 Register NameServer error: 0x%x\n",
                 mb->mbxStatus);
        /* decrement the node reference count held for this
         * callback function.
         */
        lpfc_nlp_put(ndlp);
        lpfc_mbuf_free(phba, mp->virt, mp->phys);
        kfree(mp);
        mempool_free(pmb, phba->mbox_mem_pool);

        /* If no other thread is using the ndlp, free it */
        lpfc_nlp_not_used(ndlp);

        if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
            /*
             * RegLogin failed, use loop map to make discovery
             * list
             */
            lpfc_disc_list_loopmap(vport);

            /* Start discovery */
            lpfc_disc_start(vport);
            return;
        }
        lpfc_vport_set_state(vport, FC_VPORT_FAILED);
        return;
    }

    if (phba->sli_rev < LPFC_SLI_REV4)
        ndlp->nlp_rpi = mb->un.varWords[0];
    ndlp->nlp_flag |= NLP_RPI_REGISTERED;
    ndlp->nlp_type |= NLP_FABRIC;
    lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);

    if (vport->port_state < LPFC_VPORT_READY) {
        /* Link up discovery requires Fabric registration. */
        lpfc_ns_cmd(vport, SLI_CTNS_RFF_ID, 0, 0); /* Do this first! */
        lpfc_ns_cmd(vport, SLI_CTNS_RNN_ID, 0, 0);
        lpfc_ns_cmd(vport, SLI_CTNS_RSNN_NN, 0, 0);
        lpfc_ns_cmd(vport, SLI_CTNS_RSPN_ID, 0, 0);
        lpfc_ns_cmd(vport, SLI_CTNS_RFT_ID, 0, 0);

        /* Issue SCR just before NameServer GID_FT Query */
        lpfc_issue_els_scr(vport, SCR_DID, 0);
    }

    vport->fc_ns_retry = 0;
    /* Good status, issue CT Request to NameServer */
    if (lpfc_ns_cmd(vport, SLI_CTNS_GID_FT, 0, 0)) {
        /* Cannot issue NameServer Query, so finish up discovery */
        goto out;
    }

    /* decrement the node reference count held for this
     * callback function.
     */
    lpfc_nlp_put(ndlp);
    lpfc_mbuf_free(phba, mp->virt, mp->phys);
    kfree(mp);
    mempool_free(pmb, phba->mbox_mem_pool);

    return;
}

static void
lpfc_register_remote_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
    struct fc_rport  *rport;
    struct lpfc_rport_data *rdata;
    struct fc_rport_identifiers rport_ids;
    struct lpfc_hba  *phba = vport->phba;

    /* Remote port has reappeared. Re-register w/ FC transport */
    rport_ids.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
    rport_ids.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
    rport_ids.port_id = ndlp->nlp_DID;
    rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;

    /*
     * We leave our node pointer in rport->dd_data when we unregister a
     * FCP target port.  But fc_remote_port_add zeros the space to which
     * rport->dd_data points.  So, if we're reusing a previously
     * registered port, drop the reference that we took the last time we
     * registered the port.
     */
    if (ndlp->rport && ndlp->rport->dd_data &&
        ((struct lpfc_rport_data *) ndlp->rport->dd_data)->pnode == ndlp)
        lpfc_nlp_put(ndlp);

    lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
        "rport add:       did:x%x flg:x%x type x%x",
        ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);

    /* Don't add the remote port if unloading. */
    if (vport->load_flag & FC_UNLOADING)
        return;

    ndlp->rport = rport = fc_remote_port_add(shost, 0, &rport_ids);
    if (!rport || !get_device(&rport->dev)) {
        dev_printk(KERN_WARNING, &phba->pcidev->dev,
               "Warning: fc_remote_port_add failed\n");
        return;
    }

    /* initialize static port data */
    rport->maxframe_size = ndlp->nlp_maxframe;
    rport->supported_classes = ndlp->nlp_class_sup;
    rdata = rport->dd_data;
    rdata->pnode = lpfc_nlp_get(ndlp);

    if (ndlp->nlp_type & NLP_FCP_TARGET)
        rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
    if (ndlp->nlp_type & NLP_FCP_INITIATOR)
        rport_ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR;

    if (rport_ids.roles !=  FC_RPORT_ROLE_UNKNOWN)
        fc_remote_port_rolechg(rport, rport_ids.roles);

    lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
             "3183 rport register x%06x, rport %p role x%x\n",
             ndlp->nlp_DID, rport, rport_ids.roles);

    if ((rport->scsi_target_id != -1) &&
        (rport->scsi_target_id < LPFC_MAX_TARGET)) {
        ndlp->nlp_sid = rport->scsi_target_id;
    }
    return;
}

static void
lpfc_unregister_remote_port(struct lpfc_nodelist *ndlp)
{
    struct fc_rport *rport = ndlp->rport;

    lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_RPORT,
        "rport delete:    did:x%x flg:x%x type x%x",
        ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);

    lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
             "3184 rport unregister x%06x, rport %p\n",
             ndlp->nlp_DID, rport);

    fc_remote_port_delete(rport);

    return;
}

static void
lpfc_nlp_counters(struct lpfc_vport *vport, int state, int count)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);

    spin_lock_irq(shost->host_lock);
    switch (state) {
    case NLP_STE_UNUSED_NODE:
        vport->fc_unused_cnt += count;
        break;
    case NLP_STE_PLOGI_ISSUE:
        vport->fc_plogi_cnt += count;
        break;
    case NLP_STE_ADISC_ISSUE:
        vport->fc_adisc_cnt += count;
        break;
    case NLP_STE_REG_LOGIN_ISSUE:
        vport->fc_reglogin_cnt += count;
        break;
    case NLP_STE_PRLI_ISSUE:
        vport->fc_prli_cnt += count;
        break;
    case NLP_STE_UNMAPPED_NODE:
        vport->fc_unmap_cnt += count;
        break;
    case NLP_STE_MAPPED_NODE:
        vport->fc_map_cnt += count;
        break;
    case NLP_STE_NPR_NODE:
        vport->fc_npr_cnt += count;
        break;
    }
    spin_unlock_irq(shost->host_lock);
}

static void
lpfc_nlp_state_cleanup(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
               int old_state, int new_state)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);

    if (new_state == NLP_STE_UNMAPPED_NODE) {
        ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
        ndlp->nlp_type |= NLP_FC_NODE;
    }
    if (new_state == NLP_STE_MAPPED_NODE)
        ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
    if (new_state == NLP_STE_NPR_NODE)
        ndlp->nlp_flag &= ~NLP_RCV_PLOGI;

    /* Transport interface */
    if (ndlp->rport && (old_state == NLP_STE_MAPPED_NODE ||
                old_state == NLP_STE_UNMAPPED_NODE)) {
        vport->phba->nport_event_cnt++;
        lpfc_unregister_remote_port(ndlp);
    }

    if (new_state ==  NLP_STE_MAPPED_NODE ||
        new_state == NLP_STE_UNMAPPED_NODE) {
        vport->phba->nport_event_cnt++;
        /*
         * Tell the fc transport about the port, if we haven't
         * already. If we have, and it's a scsi entity, be
         * sure to unblock any attached scsi devices
         */
        lpfc_register_remote_port(vport, ndlp);
    }
    if ((new_state ==  NLP_STE_MAPPED_NODE) &&
        (vport->stat_data_enabled)) {
        /*
         * A new target is discovered, if there is no buffer for
         * statistical data collection allocate buffer.
         */
        ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
                     sizeof(struct lpfc_scsicmd_bkt),
                     GFP_KERNEL);

        if (!ndlp->lat_data)
            lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
                "0286 lpfc_nlp_state_cleanup failed to "
                "allocate statistical data buffer DID "
                "0x%x\n", ndlp->nlp_DID);
    }
    /*
     * if we added to Mapped list, but the remote port
     * registration failed or assigned a target id outside
     * our presentable range - move the node to the
     * Unmapped List
     */
    if (new_state == NLP_STE_MAPPED_NODE &&
        (!ndlp->rport ||
         ndlp->rport->scsi_target_id == -1 ||
         ndlp->rport->scsi_target_id >= LPFC_MAX_TARGET)) {
        spin_lock_irq(shost->host_lock);
        ndlp->nlp_flag |= NLP_TGT_NO_SCSIID;
        spin_unlock_irq(shost->host_lock);
        lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
    }
}

static char *
lpfc_nlp_state_name(char *buffer, size_t size, int state)
{
    static char *states[] = {
        [NLP_STE_UNUSED_NODE] = "UNUSED",
        [NLP_STE_PLOGI_ISSUE] = "PLOGI",
        [NLP_STE_ADISC_ISSUE] = "ADISC",
        [NLP_STE_REG_LOGIN_ISSUE] = "REGLOGIN",
        [NLP_STE_PRLI_ISSUE] = "PRLI",
        [NLP_STE_LOGO_ISSUE] = "LOGO",
        [NLP_STE_UNMAPPED_NODE] = "UNMAPPED",
        [NLP_STE_MAPPED_NODE] = "MAPPED",
        [NLP_STE_NPR_NODE] = "NPR",
    };

    if (state < NLP_STE_MAX_STATE && states[state])
        strlcpy(buffer, states[state], size);
    else
        snprintf(buffer, size, "unknown (%d)", state);
    return buffer;
}

void
lpfc_nlp_set_state(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
           int state)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
    int  old_state = ndlp->nlp_state;
    char name1[16], name2[16];

    lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
             "0904 NPort state transition x%06x, %s -> %s\n",
             ndlp->nlp_DID,
             lpfc_nlp_state_name(name1, sizeof(name1), old_state),
             lpfc_nlp_state_name(name2, sizeof(name2), state));

    lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
        "node statechg    did:x%x old:%d ste:%d",
        ndlp->nlp_DID, old_state, state);

    if (old_state == NLP_STE_NPR_NODE &&
        state != NLP_STE_NPR_NODE)
        lpfc_cancel_retry_delay_tmo(vport, ndlp);
    if (old_state == NLP_STE_UNMAPPED_NODE) {
        ndlp->nlp_flag &= ~NLP_TGT_NO_SCSIID;
        ndlp->nlp_type &= ~NLP_FC_NODE;
    }

    if (list_empty(&ndlp->nlp_listp)) {
        spin_lock_irq(shost->host_lock);
        list_add_tail(&ndlp->nlp_listp, &vport->fc_nodes);
        spin_unlock_irq(shost->host_lock);
    } else if (old_state)
        lpfc_nlp_counters(vport, old_state, -1);

    ndlp->nlp_state = state;
    lpfc_nlp_counters(vport, state, 1);
    lpfc_nlp_state_cleanup(vport, ndlp, old_state, state);
}

void
lpfc_enqueue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);

    if (list_empty(&ndlp->nlp_listp)) {
        spin_lock_irq(shost->host_lock);
        list_add_tail(&ndlp->nlp_listp, &vport->fc_nodes);
        spin_unlock_irq(shost->host_lock);
    }
}

void
lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);

    lpfc_cancel_retry_delay_tmo(vport, ndlp);
    if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp))
        lpfc_nlp_counters(vport, ndlp->nlp_state, -1);
    spin_lock_irq(shost->host_lock);
    list_del_init(&ndlp->nlp_listp);
    spin_unlock_irq(shost->host_lock);
    lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state,
                NLP_STE_UNUSED_NODE);
}

static void
lpfc_disable_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
    lpfc_cancel_retry_delay_tmo(vport, ndlp);
    if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp))
        lpfc_nlp_counters(vport, ndlp->nlp_state, -1);
    lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state,
                NLP_STE_UNUSED_NODE);
}
static inline void
lpfc_initialize_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
    uint32_t did)
{
    INIT_LIST_HEAD(&ndlp->els_retry_evt.evt_listp);
    INIT_LIST_HEAD(&ndlp->dev_loss_evt.evt_listp);
    init_timer(&ndlp->nlp_delayfunc);
    ndlp->nlp_delayfunc.function = lpfc_els_retry_delay;
    ndlp->nlp_delayfunc.data = (unsigned long)ndlp;
    ndlp->nlp_DID = did;
    ndlp->vport = vport;
    ndlp->phba = vport->phba;
    ndlp->nlp_sid = NLP_NO_SID;
    kref_init(&ndlp->kref);
    NLP_INT_NODE_ACT(ndlp);
    atomic_set(&ndlp->cmd_pending, 0);
    ndlp->cmd_qdepth = vport->cfg_tgt_queue_depth;
    if (vport->phba->sli_rev == LPFC_SLI_REV4)
        ndlp->nlp_rpi = lpfc_sli4_alloc_rpi(vport->phba);
}

struct lpfc_nodelist *
lpfc_enable_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
         int state)
{
    struct lpfc_hba *phba = vport->phba;
    uint32_t did;
    unsigned long flags;

    if (!ndlp)
        return NULL;

    spin_lock_irqsave(&phba->ndlp_lock, flags);
    /* The ndlp should not be in memory free mode */
    if (NLP_CHK_FREE_REQ(ndlp)) {
        spin_unlock_irqrestore(&phba->ndlp_lock, flags);
        lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
                "0277 lpfc_enable_node: ndlp:x%p "
                "usgmap:x%x refcnt:%d\n",
                (void *)ndlp, ndlp->nlp_usg_map,
                atomic_read(&ndlp->kref.refcount));
        return NULL;
    }
    /* The ndlp should not already be in active mode */
    if (NLP_CHK_NODE_ACT(ndlp)) {
        spin_unlock_irqrestore(&phba->ndlp_lock, flags);
        lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
                "0278 lpfc_enable_node: ndlp:x%p "
                "usgmap:x%x refcnt:%d\n",
                (void *)ndlp, ndlp->nlp_usg_map,
                atomic_read(&ndlp->kref.refcount));
        return NULL;
    }

    /* Keep the original DID */
    did = ndlp->nlp_DID;

    /* re-initialize ndlp except of ndlp linked list pointer */
    memset((((char *)ndlp) + sizeof (struct list_head)), 0,
        sizeof (struct lpfc_nodelist) - sizeof (struct list_head));
    lpfc_initialize_node(vport, ndlp, did);

    spin_unlock_irqrestore(&phba->ndlp_lock, flags);

    if (state != NLP_STE_UNUSED_NODE)
        lpfc_nlp_set_state(vport, ndlp, state);

    lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
        "node enable:       did:x%x",
        ndlp->nlp_DID, 0, 0);
    return ndlp;
}

void
lpfc_drop_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
    /*
     * Use of lpfc_drop_node and UNUSED list: lpfc_drop_node should
     * be used if we wish to issue the "last" lpfc_nlp_put() to remove
     * the ndlp from the vport. The ndlp marked as UNUSED on the list
     * until ALL other outstanding threads have completed. We check
     * that the ndlp not already in the UNUSED state before we proceed.
     */
    if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
        return;
    lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNUSED_NODE);
    if (vport->phba->sli_rev == LPFC_SLI_REV4)
        lpfc_cleanup_vports_rrqs(vport, ndlp);
    lpfc_nlp_put(ndlp);
    return;
}

/*
 * Start / ReStart rescue timer for Discovery / RSCN handling
 */
void
lpfc_set_disctmo(struct lpfc_vport *vport)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
    struct lpfc_hba  *phba = vport->phba;
    uint32_t tmo;

    if (vport->port_state == LPFC_LOCAL_CFG_LINK) {
        /* For FAN, timeout should be greater than edtov */
        tmo = (((phba->fc_edtov + 999) / 1000) + 1);
    } else {
        /* Normal discovery timeout should be > than ELS/CT timeout
         * FC spec states we need 3 * ratov for CT requests
         */
        tmo = ((phba->fc_ratov * 3) + 3);
    }


    if (!timer_pending(&vport->fc_disctmo)) {
        lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
            "set disc timer:  tmo:x%x state:x%x flg:x%x",
            tmo, vport->port_state, vport->fc_flag);
    }

    mod_timer(&vport->fc_disctmo, jiffies + HZ * tmo);
    spin_lock_irq(shost->host_lock);
    vport->fc_flag |= FC_DISC_TMO;
    spin_unlock_irq(shost->host_lock);

    /* Start Discovery Timer state <hba_state> */
    lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
             "0247 Start Discovery Timer state x%x "
             "Data: x%x x%lx x%x x%x\n",
             vport->port_state, tmo,
             (unsigned long)&vport->fc_disctmo, vport->fc_plogi_cnt,
             vport->fc_adisc_cnt);

    return;
}

/*
 * Cancel rescue timer for Discovery / RSCN handling
 */
int
lpfc_can_disctmo(struct lpfc_vport *vport)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
    unsigned long iflags;

    lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
        "can disc timer:  state:x%x rtry:x%x flg:x%x",
        vport->port_state, vport->fc_ns_retry, vport->fc_flag);

    /* Turn off discovery timer if its running */
    if (vport->fc_flag & FC_DISC_TMO) {
        spin_lock_irqsave(shost->host_lock, iflags);
        vport->fc_flag &= ~FC_DISC_TMO;
        spin_unlock_irqrestore(shost->host_lock, iflags);
        del_timer_sync(&vport->fc_disctmo);
        spin_lock_irqsave(&vport->work_port_lock, iflags);
        vport->work_port_events &= ~WORKER_DISC_TMO;
        spin_unlock_irqrestore(&vport->work_port_lock, iflags);
    }

    /* Cancel Discovery Timer state <hba_state> */
    lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
             "0248 Cancel Discovery Timer state x%x "
             "Data: x%x x%x x%x\n",
             vport->port_state, vport->fc_flag,
             vport->fc_plogi_cnt, vport->fc_adisc_cnt);
    return 0;
}

/*
 * Check specified ring for outstanding IOCB on the SLI queue
 * Return true if iocb matches the specified nport
 */
int
lpfc_check_sli_ndlp(struct lpfc_hba *phba,
            struct lpfc_sli_ring *pring,
            struct lpfc_iocbq *iocb,
            struct lpfc_nodelist *ndlp)
{
    struct lpfc_sli *psli = &phba->sli;
    IOCB_t *icmd = &iocb->iocb;
    struct lpfc_vport    *vport = ndlp->vport;

    if (iocb->vport != vport)
        return 0;

    if (pring->ringno == LPFC_ELS_RING) {
        switch (icmd->ulpCommand) {
        case CMD_GEN_REQUEST64_CR:
            if (iocb->context_un.ndlp == ndlp)
                return 1;
        case CMD_ELS_REQUEST64_CR:
            if (icmd->un.elsreq64.remoteID == ndlp->nlp_DID)
                return 1;
        case CMD_XMIT_ELS_RSP64_CX:
            if (iocb->context1 == (uint8_t *) ndlp)
                return 1;
        }
    } else if (pring->ringno == psli->extra_ring) {

    } else if (pring->ringno == psli->fcp_ring) {
        /* Skip match check if waiting to relogin to FCP target */
        if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
            (ndlp->nlp_flag & NLP_DELAY_TMO)) {
            return 0;
        }
        if (icmd->ulpContext == (volatile ushort)ndlp->nlp_rpi) {
            return 1;
        }
    } else if (pring->ringno == psli->next_ring) {

    }
    return 0;
}

/*
 * Free resources / clean up outstanding I/Os
 * associated with nlp_rpi in the LPFC_NODELIST entry.
 */
static int
lpfc_no_rpi(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
{
    LIST_HEAD(completions);
    struct lpfc_sli *psli;
    struct lpfc_sli_ring *pring;
    struct lpfc_iocbq *iocb, *next_iocb;
    uint32_t i;

    lpfc_fabric_abort_nport(ndlp);

    /*
     * Everything that matches on txcmplq will be returned
     * by firmware with a no rpi error.
     */
    psli = &phba->sli;
    if (ndlp->nlp_flag & NLP_RPI_REGISTERED) {
        /* Now process each ring */
        for (i = 0; i < psli->num_rings; i++) {
            pring = &psli->ring[i];

            spin_lock_irq(&phba->hbalock);
            list_for_each_entry_safe(iocb, next_iocb, &pring->txq,
                         list) {
                /*
                 * Check to see if iocb matches the nport we are
                 * looking for
                 */
                if ((lpfc_check_sli_ndlp(phba, pring, iocb,
                             ndlp))) {
                    /* It matches, so deque and call compl
                       with an error */
                    list_move_tail(&iocb->list,
                               &completions);
                    pring->txq_cnt--;
                }
            }
            spin_unlock_irq(&phba->hbalock);
        }
    }

    /* Cancel all the IOCBs from the completions list */
    lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
                  IOERR_SLI_ABORTED);

    return 0;
}

void
lpfc_nlp_logo_unreg(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
    struct lpfc_vport  *vport = pmb->vport;
    struct lpfc_nodelist *ndlp;

    ndlp = (struct lpfc_nodelist *)(pmb->context1);
    if (!ndlp)
        return;
    lpfc_issue_els_logo(vport, ndlp, 0);
}

/*
 * Free rpi associated with LPFC_NODELIST entry.
 * This routine is called from lpfc_freenode(), when we are removing
 * a LPFC_NODELIST entry. It is also called if the driver initiates a
 * LOGO that completes successfully, and we are waiting to PLOGI back
 * to the remote NPort. In addition, it is called after we receive
 * and unsolicated ELS cmd, send back a rsp, the rsp completes and
 * we are waiting to PLOGI back to the remote NPort.
 */
int
lpfc_unreg_rpi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
    struct lpfc_hba *phba = vport->phba;
    LPFC_MBOXQ_t    *mbox;
    int rc;
    uint16_t rpi;

    if (ndlp->nlp_flag & NLP_RPI_REGISTERED) {
        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (mbox) {
            /* SLI4 ports require the physical rpi value. */
            rpi = ndlp->nlp_rpi;
            if (phba->sli_rev == LPFC_SLI_REV4)
                rpi = phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];

            lpfc_unreg_login(phba, vport->vpi, rpi, mbox);
            mbox->vport = vport;
            if (ndlp->nlp_flag & NLP_ISSUE_LOGO) {
                mbox->context1 = ndlp;
                mbox->mbox_cmpl = lpfc_nlp_logo_unreg;
            } else {
                mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
            }

            rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
            if (rc == MBX_NOT_FINISHED)
                mempool_free(mbox, phba->mbox_mem_pool);
        }
        lpfc_no_rpi(phba, ndlp);

        if (phba->sli_rev != LPFC_SLI_REV4)
            ndlp->nlp_rpi = 0;
        ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;
        ndlp->nlp_flag &= ~NLP_NPR_ADISC;
        return 1;
    }
    return 0;
}

void
lpfc_unreg_hba_rpis(struct lpfc_hba *phba)
{
    struct lpfc_vport **vports;
    struct lpfc_nodelist *ndlp;
    struct Scsi_Host *shost;
    int i;

    vports = lpfc_create_vport_work_array(phba);
    if (!vports) {
        lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
            "2884 Vport array allocation failed \n");
        return;
    }
    for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
        shost = lpfc_shost_from_vport(vports[i]);
        spin_lock_irq(shost->host_lock);
        list_for_each_entry(ndlp, &vports[i]->fc_nodes, nlp_listp) {
            if (ndlp->nlp_flag & NLP_RPI_REGISTERED) {
                /* The mempool_alloc might sleep */
                spin_unlock_irq(shost->host_lock);
                lpfc_unreg_rpi(vports[i], ndlp);
                spin_lock_irq(shost->host_lock);
            }
        }
        spin_unlock_irq(shost->host_lock);
    }
    lpfc_destroy_vport_work_array(phba, vports);
}

void
lpfc_unreg_all_rpis(struct lpfc_vport *vport)
{
    struct lpfc_hba  *phba  = vport->phba;
    LPFC_MBOXQ_t     *mbox;
    int rc;

    if (phba->sli_rev == LPFC_SLI_REV4) {
        lpfc_sli4_unreg_all_rpis(vport);
        return;
    }

    mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
    if (mbox) {
        lpfc_unreg_login(phba, vport->vpi, LPFC_UNREG_ALL_RPIS_VPORT,
                 mbox);
        mbox->vport = vport;
        mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        mbox->context1 = NULL;
        rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_TMO);
        if (rc != MBX_TIMEOUT)
            mempool_free(mbox, phba->mbox_mem_pool);

        if ((rc == MBX_TIMEOUT) || (rc == MBX_NOT_FINISHED))
            lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
                "1836 Could not issue "
                "unreg_login(all_rpis) status %d\n", rc);
    }
}

void
lpfc_unreg_default_rpis(struct lpfc_vport *vport)
{
    struct lpfc_hba  *phba  = vport->phba;
    LPFC_MBOXQ_t     *mbox;
    int rc;

    mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
    if (mbox) {
        lpfc_unreg_did(phba, vport->vpi, LPFC_UNREG_ALL_DFLT_RPIS,
                   mbox);
        mbox->vport = vport;
        mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        mbox->context1 = NULL;
        rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_TMO);
        if (rc != MBX_TIMEOUT)
            mempool_free(mbox, phba->mbox_mem_pool);

        if ((rc == MBX_TIMEOUT) || (rc == MBX_NOT_FINISHED))
            lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
                     "1815 Could not issue "
                     "unreg_did (default rpis) status %d\n",
                     rc);
    }
}

/*
 * Free resources associated with LPFC_NODELIST entry
 * so it can be freed.
 */
static int
lpfc_cleanup_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
    struct lpfc_hba  *phba = vport->phba;
    LPFC_MBOXQ_t *mb, *nextmb;
    struct lpfc_dmabuf *mp;

    /* Cleanup node for NPort <nlp_DID> */
    lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
             "0900 Cleanup node for NPort x%x "
             "Data: x%x x%x x%x\n",
             ndlp->nlp_DID, ndlp->nlp_flag,
             ndlp->nlp_state, ndlp->nlp_rpi);
    if (NLP_CHK_FREE_REQ(ndlp)) {
        lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
                "0280 lpfc_cleanup_node: ndlp:x%p "
                "usgmap:x%x refcnt:%d\n",
                (void *)ndlp, ndlp->nlp_usg_map,
                atomic_read(&ndlp->kref.refcount));
        lpfc_dequeue_node(vport, ndlp);
    } else {
        lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
                "0281 lpfc_cleanup_node: ndlp:x%p "
                "usgmap:x%x refcnt:%d\n",
                (void *)ndlp, ndlp->nlp_usg_map,
                atomic_read(&ndlp->kref.refcount));
        lpfc_disable_node(vport, ndlp);
    }


    /* Don't need to clean up REG_LOGIN64 cmds for Default RPI cleanup */

    /* cleanup any ndlp on mbox q waiting for reglogin cmpl */
    if ((mb = phba->sli.mbox_active)) {
        if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
           !(mb->mbox_flag & LPFC_MBX_IMED_UNREG) &&
           (ndlp == (struct lpfc_nodelist *) mb->context2)) {
            mb->context2 = NULL;
            mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        }
    }

    spin_lock_irq(&phba->hbalock);
    /* Cleanup REG_LOGIN completions which are not yet processed */
    list_for_each_entry(mb, &phba->sli.mboxq_cmpl, list) {
        if ((mb->u.mb.mbxCommand != MBX_REG_LOGIN64) ||
            (mb->mbox_flag & LPFC_MBX_IMED_UNREG) ||
            (ndlp != (struct lpfc_nodelist *) mb->context2))
            continue;

        mb->context2 = NULL;
        mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
    }

    list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
        if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
           !(mb->mbox_flag & LPFC_MBX_IMED_UNREG) &&
            (ndlp == (struct lpfc_nodelist *) mb->context2)) {
            mp = (struct lpfc_dmabuf *) (mb->context1);
            if (mp) {
                __lpfc_mbuf_free(phba, mp->virt, mp->phys);
                kfree(mp);
            }
            list_del(&mb->list);
            mempool_free(mb, phba->mbox_mem_pool);
            /* We shall not invoke the lpfc_nlp_put to decrement
             * the ndlp reference count as we are in the process
             * of lpfc_nlp_release.
             */
        }
    }
    spin_unlock_irq(&phba->hbalock);

    lpfc_els_abort(phba, ndlp);

    spin_lock_irq(shost->host_lock);
    ndlp->nlp_flag &= ~NLP_DELAY_TMO;
    spin_unlock_irq(shost->host_lock);

    ndlp->nlp_last_elscmd = 0;
    del_timer_sync(&ndlp->nlp_delayfunc);

    list_del_init(&ndlp->els_retry_evt.evt_listp);
    list_del_init(&ndlp->dev_loss_evt.evt_listp);
    lpfc_cleanup_vports_rrqs(vport, ndlp);
    lpfc_unreg_rpi(vport, ndlp);

    return 0;
}

/*
 * Check to see if we can free the nlp back to the freelist.
 * If we are in the middle of using the nlp in the discovery state
 * machine, defer the free till we reach the end of the state machine.
 */
static void
lpfc_nlp_remove(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
    struct lpfc_hba  *phba = vport->phba;
    struct lpfc_rport_data *rdata;
    LPFC_MBOXQ_t *mbox;
    int rc;

    lpfc_cancel_retry_delay_tmo(vport, ndlp);
    if ((ndlp->nlp_flag & NLP_DEFER_RM) &&
        !(ndlp->nlp_flag & NLP_REG_LOGIN_SEND) &&
        !(ndlp->nlp_flag & NLP_RPI_REGISTERED)) {
        /* For this case we need to cleanup the default rpi
         * allocated by the firmware.
         */
        if ((mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL))
            != NULL) {
            rc = lpfc_reg_rpi(phba, vport->vpi, ndlp->nlp_DID,
                (uint8_t *) &vport->fc_sparam, mbox, ndlp->nlp_rpi);
            if (rc) {
                mempool_free(mbox, phba->mbox_mem_pool);
            }
            else {
                mbox->mbox_flag |= LPFC_MBX_IMED_UNREG;
                mbox->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi;
                mbox->vport = vport;
                mbox->context2 = ndlp;
                rc =lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
                if (rc == MBX_NOT_FINISHED) {
                    mempool_free(mbox, phba->mbox_mem_pool);
                }
            }
        }
    }
    lpfc_cleanup_node(vport, ndlp);

    /*
     * We can get here with a non-NULL ndlp->rport because when we
     * unregister a rport we don't break the rport/node linkage.  So if we
     * do, make sure we don't leaving any dangling pointers behind.
     */
    if (ndlp->rport) {
        rdata = ndlp->rport->dd_data;
        rdata->pnode = NULL;
        ndlp->rport = NULL;
    }
}

static int
lpfc_matchdid(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
          uint32_t did)
{
    D_ID mydid, ndlpdid, matchdid;

    if (did == Bcast_DID)
        return 0;

    /* First check for Direct match */
    if (ndlp->nlp_DID == did)
        return 1;

    /* Next check for area/domain identically equals 0 match */
    mydid.un.word = vport->fc_myDID;
    if ((mydid.un.b.domain == 0) && (mydid.un.b.area == 0)) {
        return 0;
    }

    matchdid.un.word = did;
    ndlpdid.un.word = ndlp->nlp_DID;
    if (matchdid.un.b.id == ndlpdid.un.b.id) {
        if ((mydid.un.b.domain == matchdid.un.b.domain) &&
            (mydid.un.b.area == matchdid.un.b.area)) {
            if ((ndlpdid.un.b.domain == 0) &&
                (ndlpdid.un.b.area == 0)) {
                if (ndlpdid.un.b.id)
                    return 1;
            }
            return 0;
        }

        matchdid.un.word = ndlp->nlp_DID;
        if ((mydid.un.b.domain == ndlpdid.un.b.domain) &&
            (mydid.un.b.area == ndlpdid.un.b.area)) {
            if ((matchdid.un.b.domain == 0) &&
                (matchdid.un.b.area == 0)) {
                if (matchdid.un.b.id)
                    return 1;
            }
        }
    }
    return 0;
}

/* Search for a nodelist entry */
static struct lpfc_nodelist *
__lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
{
    struct lpfc_nodelist *ndlp;
    uint32_t data1;

    list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
        if (lpfc_matchdid(vport, ndlp, did)) {
            data1 = (((uint32_t) ndlp->nlp_state << 24) |
                 ((uint32_t) ndlp->nlp_xri << 16) |
                 ((uint32_t) ndlp->nlp_type << 8) |
                 ((uint32_t) ndlp->nlp_rpi & 0xff));
            lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
                     "0929 FIND node DID "
                     "Data: x%p x%x x%x x%x\n",
                     ndlp, ndlp->nlp_DID,
                     ndlp->nlp_flag, data1);
            return ndlp;
        }
    }

    /* FIND node did <did> NOT FOUND */
    lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
             "0932 FIND node did x%x NOT FOUND.\n", did);
    return NULL;
}

struct lpfc_nodelist *
lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
    struct lpfc_nodelist *ndlp;
    unsigned long iflags;

    spin_lock_irqsave(shost->host_lock, iflags);
    ndlp = __lpfc_findnode_did(vport, did);
    spin_unlock_irqrestore(shost->host_lock, iflags);
    return ndlp;
}

struct lpfc_nodelist *
lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
    struct lpfc_nodelist *ndlp;

    ndlp = lpfc_findnode_did(vport, did);
    if (!ndlp) {
        if ((vport->fc_flag & FC_RSCN_MODE) != 0 &&
            lpfc_rscn_payload_check(vport, did) == 0)
            return NULL;
        ndlp = (struct lpfc_nodelist *)
             mempool_alloc(vport->phba->nlp_mem_pool, GFP_KERNEL);
        if (!ndlp)
            return NULL;
        lpfc_nlp_init(vport, ndlp, did);
        lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
        spin_lock_irq(shost->host_lock);
        ndlp->nlp_flag |= NLP_NPR_2B_DISC;
        spin_unlock_irq(shost->host_lock);
        return ndlp;
    } else if (!NLP_CHK_NODE_ACT(ndlp)) {
        ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_NPR_NODE);
        if (!ndlp)
            return NULL;
        spin_lock_irq(shost->host_lock);
        ndlp->nlp_flag |= NLP_NPR_2B_DISC;
        spin_unlock_irq(shost->host_lock);
        return ndlp;
    }

    if ((vport->fc_flag & FC_RSCN_MODE) &&
        !(vport->fc_flag & FC_NDISC_ACTIVE)) {
        if (lpfc_rscn_payload_check(vport, did)) {
            /* If we've already received a PLOGI from this NPort
             * we don't need to try to discover it again.
             */
            if (ndlp->nlp_flag & NLP_RCV_PLOGI)
                return NULL;

            /* Since this node is marked for discovery,
             * delay timeout is not needed.
             */
            lpfc_cancel_retry_delay_tmo(vport, ndlp);
            spin_lock_irq(shost->host_lock);
            ndlp->nlp_flag |= NLP_NPR_2B_DISC;
            spin_unlock_irq(shost->host_lock);
        } else
            ndlp = NULL;
    } else {
        /* If we've already received a PLOGI from this NPort,
         * or we are already in the process of discovery on it,
         * we don't need to try to discover it again.
         */
        if (ndlp->nlp_state == NLP_STE_ADISC_ISSUE ||
            ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
            ndlp->nlp_flag & NLP_RCV_PLOGI)
            return NULL;
        lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
        spin_lock_irq(shost->host_lock);
        ndlp->nlp_flag |= NLP_NPR_2B_DISC;
        spin_unlock_irq(shost->host_lock);
    }
    return ndlp;
}

/* Build a list of nodes to discover based on the loopmap */
void
lpfc_disc_list_loopmap(struct lpfc_vport *vport)
{
    struct lpfc_hba  *phba = vport->phba;
    int j;
    uint32_t alpa, index;

    if (!lpfc_is_link_up(phba))
        return;

    if (phba->fc_topology != LPFC_TOPOLOGY_LOOP)
        return;

    /* Check for loop map present or not */
    if (phba->alpa_map[0]) {
        for (j = 1; j <= phba->alpa_map[0]; j++) {
            alpa = phba->alpa_map[j];
            if (((vport->fc_myDID & 0xff) == alpa) || (alpa == 0))
                continue;
            lpfc_setup_disc_node(vport, alpa);
        }
    } else {
        /* No alpamap, so try all alpa's */
        for (j = 0; j < FC_MAXLOOP; j++) {
            /* If cfg_scan_down is set, start from highest
             * ALPA (0xef) to lowest (0x1).
             */
            if (vport->cfg_scan_down)
                index = j;
            else
                index = FC_MAXLOOP - j - 1;
            alpa = lpfcAlpaArray[index];
            if ((vport->fc_myDID & 0xff) == alpa)
                continue;
            lpfc_setup_disc_node(vport, alpa);
        }
    }
    return;
}

void
lpfc_issue_clear_la(struct lpfc_hba *phba, struct lpfc_vport *vport)
{
    LPFC_MBOXQ_t *mbox;
    struct lpfc_sli *psli = &phba->sli;
    struct lpfc_sli_ring *extra_ring = &psli->ring[psli->extra_ring];
    struct lpfc_sli_ring *fcp_ring   = &psli->ring[psli->fcp_ring];
    struct lpfc_sli_ring *next_ring  = &psli->ring[psli->next_ring];
    int  rc;

    /*
     * if it's not a physical port or if we already send
     * clear_la then don't send it.
     */
    if ((phba->link_state >= LPFC_CLEAR_LA) ||
        (vport->port_type != LPFC_PHYSICAL_PORT) ||
        (phba->sli_rev == LPFC_SLI_REV4))
        return;

            /* Link up discovery */
    if ((mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL)) != NULL) {
        phba->link_state = LPFC_CLEAR_LA;
        lpfc_clear_la(phba, mbox);
        mbox->mbox_cmpl = lpfc_mbx_cmpl_clear_la;
        mbox->vport = vport;
        rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
        if (rc == MBX_NOT_FINISHED) {
            mempool_free(mbox, phba->mbox_mem_pool);
            lpfc_disc_flush_list(vport);
            extra_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
            fcp_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
            next_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
            phba->link_state = LPFC_HBA_ERROR;
        }
    }
}

/* Reg_vpi to tell firmware to resume normal operations */
void
lpfc_issue_reg_vpi(struct lpfc_hba *phba, struct lpfc_vport *vport)
{
    LPFC_MBOXQ_t *regvpimbox;

    regvpimbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
    if (regvpimbox) {
        lpfc_reg_vpi(vport, regvpimbox);
        regvpimbox->mbox_cmpl = lpfc_mbx_cmpl_reg_vpi;
        regvpimbox->vport = vport;
        if (lpfc_sli_issue_mbox(phba, regvpimbox, MBX_NOWAIT)
                    == MBX_NOT_FINISHED) {
            mempool_free(regvpimbox, phba->mbox_mem_pool);
        }
    }
}

/* Start Link up / RSCN discovery on NPR nodes */
void
lpfc_disc_start(struct lpfc_vport *vport)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
    struct lpfc_hba  *phba = vport->phba;
    uint32_t num_sent;
    uint32_t clear_la_pending;
    int did_changed;

    if (!lpfc_is_link_up(phba))
        return;

    if (phba->link_state == LPFC_CLEAR_LA)
        clear_la_pending = 1;
    else
        clear_la_pending = 0;

    if (vport->port_state < LPFC_VPORT_READY)
        vport->port_state = LPFC_DISC_AUTH;

    lpfc_set_disctmo(vport);

    if (vport->fc_prevDID == vport->fc_myDID)
        did_changed = 0;
    else
        did_changed = 1;

    vport->fc_prevDID = vport->fc_myDID;
    vport->num_disc_nodes = 0;

    /* Start Discovery state <hba_state> */
    lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
             "0202 Start Discovery hba state x%x "
             "Data: x%x x%x x%x\n",
             vport->port_state, vport->fc_flag, vport->fc_plogi_cnt,
             vport->fc_adisc_cnt);

    /* First do ADISCs - if any */
    num_sent = lpfc_els_disc_adisc(vport);

    if (num_sent)
        return;

    /* Register the VPI for SLI3, NON-NPIV only. */
    if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
        !(vport->fc_flag & FC_PT2PT) &&
        !(vport->fc_flag & FC_RSCN_MODE) &&
        (phba->sli_rev < LPFC_SLI_REV4)) {
        lpfc_issue_reg_vpi(phba, vport);
        return;
    }

    /*
     * For SLI2, we need to set port_state to READY and continue
     * discovery.
     */
    if (vport->port_state < LPFC_VPORT_READY && !clear_la_pending) {
        /* If we get here, there is nothing to ADISC */
        if (vport->port_type == LPFC_PHYSICAL_PORT)
            lpfc_issue_clear_la(phba, vport);

        if (!(vport->fc_flag & FC_ABORT_DISCOVERY)) {
            vport->num_disc_nodes = 0;
            /* go thru NPR nodes and issue ELS PLOGIs */
            if (vport->fc_npr_cnt)
                lpfc_els_disc_plogi(vport);

            if (!vport->num_disc_nodes) {
                spin_lock_irq(shost->host_lock);
                vport->fc_flag &= ~FC_NDISC_ACTIVE;
                spin_unlock_irq(shost->host_lock);
                lpfc_can_disctmo(vport);
            }
        }
        vport->port_state = LPFC_VPORT_READY;
    } else {
        /* Next do PLOGIs - if any */
        num_sent = lpfc_els_disc_plogi(vport);

        if (num_sent)
            return;

        if (vport->fc_flag & FC_RSCN_MODE) {
            /* Check to see if more RSCNs came in while we
             * were processing this one.
             */
            if ((vport->fc_rscn_id_cnt == 0) &&
                (!(vport->fc_flag & FC_RSCN_DISCOVERY))) {
                spin_lock_irq(shost->host_lock);
                vport->fc_flag &= ~FC_RSCN_MODE;
                spin_unlock_irq(shost->host_lock);
                lpfc_can_disctmo(vport);
            } else
                lpfc_els_handle_rscn(vport);
        }
    }
    return;
}

/*
 *  Ignore completion for all IOCBs on tx and txcmpl queue for ELS
 *  ring the match the sppecified nodelist.
 */
static void
lpfc_free_tx(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
{
    LIST_HEAD(completions);
    struct lpfc_sli *psli;
    IOCB_t     *icmd;
    struct lpfc_iocbq    *iocb, *next_iocb;
    struct lpfc_sli_ring *pring;

    psli = &phba->sli;
    pring = &psli->ring[LPFC_ELS_RING];

    /* Error matching iocb on txq or txcmplq
     * First check the txq.
     */
    spin_lock_irq(&phba->hbalock);
    list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
        if (iocb->context1 != ndlp) {
            continue;
        }
        icmd = &iocb->iocb;
        if ((icmd->ulpCommand == CMD_ELS_REQUEST64_CR) ||
            (icmd->ulpCommand == CMD_XMIT_ELS_RSP64_CX)) {

            list_move_tail(&iocb->list, &completions);
            pring->txq_cnt--;
        }
    }

    /* Next check the txcmplq */
    list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
        if (iocb->context1 != ndlp) {
            continue;
        }
        icmd = &iocb->iocb;
        if (icmd->ulpCommand == CMD_ELS_REQUEST64_CR ||
            icmd->ulpCommand == CMD_XMIT_ELS_RSP64_CX) {
            lpfc_sli_issue_abort_iotag(phba, pring, iocb);
        }
    }
    spin_unlock_irq(&phba->hbalock);

    /* Cancel all the IOCBs from the completions list */
    lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
                  IOERR_SLI_ABORTED);
}

static void
lpfc_disc_flush_list(struct lpfc_vport *vport)
{
    struct lpfc_nodelist *ndlp, *next_ndlp;
    struct lpfc_hba *phba = vport->phba;

    if (vport->fc_plogi_cnt || vport->fc_adisc_cnt) {
        list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
                     nlp_listp) {
            if (!NLP_CHK_NODE_ACT(ndlp))
                continue;
            if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
                ndlp->nlp_state == NLP_STE_ADISC_ISSUE) {
                lpfc_free_tx(phba, ndlp);
            }
        }
    }
}

void
lpfc_cleanup_discovery_resources(struct lpfc_vport *vport)
{
    lpfc_els_flush_rscn(vport);
    lpfc_els_flush_cmd(vport);
    lpfc_disc_flush_list(vport);
}

/*****************************************************************************/
/*
 * NAME:     lpfc_disc_timeout
 *
 * FUNCTION: Fibre Channel driver discovery timeout routine.
 *
 * EXECUTION ENVIRONMENT: interrupt only
 *
 * CALLED FROM:
 *      Timer function
 *
 * RETURNS:
 *      none
 */
/*****************************************************************************/
void
lpfc_disc_timeout(unsigned long ptr)
{
    struct lpfc_vport *vport = (struct lpfc_vport *) ptr;
    struct lpfc_hba   *phba = vport->phba;
    uint32_t tmo_posted;
    unsigned long flags = 0;

    if (unlikely(!phba))
        return;

    spin_lock_irqsave(&vport->work_port_lock, flags);
    tmo_posted = vport->work_port_events & WORKER_DISC_TMO;
    if (!tmo_posted)
        vport->work_port_events |= WORKER_DISC_TMO;
    spin_unlock_irqrestore(&vport->work_port_lock, flags);

    if (!tmo_posted)
        lpfc_worker_wake_up(phba);
    return;
}

static void
lpfc_disc_timeout_handler(struct lpfc_vport *vport)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
    struct lpfc_hba  *phba = vport->phba;
    struct lpfc_sli  *psli = &phba->sli;
    struct lpfc_nodelist *ndlp, *next_ndlp;
    LPFC_MBOXQ_t *initlinkmbox;
    int rc, clrlaerr = 0;

    if (!(vport->fc_flag & FC_DISC_TMO))
        return;

    spin_lock_irq(shost->host_lock);
    vport->fc_flag &= ~FC_DISC_TMO;
    spin_unlock_irq(shost->host_lock);

    lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
        "disc timeout:    state:x%x rtry:x%x flg:x%x",
        vport->port_state, vport->fc_ns_retry, vport->fc_flag);

    switch (vport->port_state) {

    case LPFC_LOCAL_CFG_LINK:
    /* port_state is identically  LPFC_LOCAL_CFG_LINK while waiting for
     * FAN
     */
                /* FAN timeout */
        lpfc_printf_vlog(vport, KERN_WARNING, LOG_DISCOVERY,
                 "0221 FAN timeout\n");
        /* Start discovery by sending FLOGI, clean up old rpis */
        list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
                     nlp_listp) {
            if (!NLP_CHK_NODE_ACT(ndlp))
                continue;
            if (ndlp->nlp_state != NLP_STE_NPR_NODE)
                continue;
            if (ndlp->nlp_type & NLP_FABRIC) {
                /* Clean up the ndlp on Fabric connections */
                lpfc_drop_node(vport, ndlp);

            } else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) {
                /* Fail outstanding IO now since device
                 * is marked for PLOGI.
                 */
                lpfc_unreg_rpi(vport, ndlp);
            }
        }
        if (vport->port_state != LPFC_FLOGI) {
            if (phba->sli_rev <= LPFC_SLI_REV3)
                lpfc_initial_flogi(vport);
            else
                lpfc_issue_init_vfi(vport);
            return;
        }
        break;

    case LPFC_FDISC:
    case LPFC_FLOGI:
    /* port_state is identically LPFC_FLOGI while waiting for FLOGI cmpl */
        /* Initial FLOGI timeout */
        lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
                 "0222 Initial %s timeout\n",
                 vport->vpi ? "FDISC" : "FLOGI");

        /* Assume no Fabric and go on with discovery.
         * Check for outstanding ELS FLOGI to abort.
         */

        /* FLOGI failed, so just use loop map to make discovery list */
        lpfc_disc_list_loopmap(vport);

        /* Start discovery */
        lpfc_disc_start(vport);
        break;

    case LPFC_FABRIC_CFG_LINK:
    /* hba_state is identically LPFC_FABRIC_CFG_LINK while waiting for
       NameServer login */
        lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
                 "0223 Timeout while waiting for "
                 "NameServer login\n");
        /* Next look for NameServer ndlp */
        ndlp = lpfc_findnode_did(vport, NameServer_DID);
        if (ndlp && NLP_CHK_NODE_ACT(ndlp))
            lpfc_els_abort(phba, ndlp);

        /* ReStart discovery */
        goto restart_disc;

    case LPFC_NS_QRY:
    /* Check for wait for NameServer Rsp timeout */
        lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
                 "0224 NameServer Query timeout "
                 "Data: x%x x%x\n",
                 vport->fc_ns_retry, LPFC_MAX_NS_RETRY);

        if (vport->fc_ns_retry < LPFC_MAX_NS_RETRY) {
            /* Try it one more time */
            vport->fc_ns_retry++;
            rc = lpfc_ns_cmd(vport, SLI_CTNS_GID_FT,
                     vport->fc_ns_retry, 0);
            if (rc == 0)
                break;
        }
        vport->fc_ns_retry = 0;

restart_disc:
        /*
         * Discovery is over.
         * set port_state to PORT_READY if SLI2.
         * cmpl_reg_vpi will set port_state to READY for SLI3.
         */
        if (phba->sli_rev < LPFC_SLI_REV4) {
            if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
                lpfc_issue_reg_vpi(phba, vport);
            else  {
                lpfc_issue_clear_la(phba, vport);
                vport->port_state = LPFC_VPORT_READY;
            }
        }

        /* Setup and issue mailbox INITIALIZE LINK command */
        initlinkmbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!initlinkmbox) {
            lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
                     "0206 Device Discovery "
                     "completion error\n");
            phba->link_state = LPFC_HBA_ERROR;
            break;
        }

        lpfc_linkdown(phba);
        lpfc_init_link(phba, initlinkmbox, phba->cfg_topology,
                   phba->cfg_link_speed);
        initlinkmbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
        initlinkmbox->vport = vport;
        initlinkmbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        rc = lpfc_sli_issue_mbox(phba, initlinkmbox, MBX_NOWAIT);
        lpfc_set_loopback_flag(phba);
        if (rc == MBX_NOT_FINISHED)
            mempool_free(initlinkmbox, phba->mbox_mem_pool);

        break;

    case LPFC_DISC_AUTH:
    /* Node Authentication timeout */
        lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
                 "0227 Node Authentication timeout\n");
        lpfc_disc_flush_list(vport);

        /*
         * set port_state to PORT_READY if SLI2.
         * cmpl_reg_vpi will set port_state to READY for SLI3.
         */
        if (phba->sli_rev < LPFC_SLI_REV4) {
            if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
                lpfc_issue_reg_vpi(phba, vport);
            else  { /* NPIV Not enabled */
                lpfc_issue_clear_la(phba, vport);
                vport->port_state = LPFC_VPORT_READY;
            }
        }
        break;

    case LPFC_VPORT_READY:
        if (vport->fc_flag & FC_RSCN_MODE) {
            lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
                     "0231 RSCN timeout Data: x%x "
                     "x%x\n",
                     vport->fc_ns_retry, LPFC_MAX_NS_RETRY);

            /* Cleanup any outstanding ELS commands */
            lpfc_els_flush_cmd(vport);

            lpfc_els_flush_rscn(vport);
            lpfc_disc_flush_list(vport);
        }
        break;

    default:
        lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
                 "0273 Unexpected discovery timeout, "
                 "vport State x%x\n", vport->port_state);
        break;
    }

    switch (phba->link_state) {
    case LPFC_CLEAR_LA:
                /* CLEAR LA timeout */
        lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
                 "0228 CLEAR LA timeout\n");
        clrlaerr = 1;
        break;

    case LPFC_LINK_UP:
        lpfc_issue_clear_la(phba, vport);
        /* Drop thru */
    case LPFC_LINK_UNKNOWN:
    case LPFC_WARM_START:
    case LPFC_INIT_START:
    case LPFC_INIT_MBX_CMDS:
    case LPFC_LINK_DOWN:
    case LPFC_HBA_ERROR:
        lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
                 "0230 Unexpected timeout, hba link "
                 "state x%x\n", phba->link_state);
        clrlaerr = 1;
        break;

    case LPFC_HBA_READY:
        break;
    }

    if (clrlaerr) {
        lpfc_disc_flush_list(vport);
        psli->ring[(psli->extra_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
        psli->ring[(psli->fcp_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
        psli->ring[(psli->next_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
        vport->port_state = LPFC_VPORT_READY;
    }

    return;
}

/*
 * This routine handles processing a NameServer REG_LOGIN mailbox
 * command upon completion. It is setup in the LPFC_MBOXQ
 * as the completion routine when the command is
 * handed off to the SLI layer.
 */
void
lpfc_mbx_cmpl_fdmi_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
    MAILBOX_t *mb = &pmb->u.mb;
    struct lpfc_dmabuf   *mp = (struct lpfc_dmabuf *) (pmb->context1);
    struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
    struct lpfc_vport    *vport = pmb->vport;

    pmb->context1 = NULL;
    pmb->context2 = NULL;

    if (phba->sli_rev < LPFC_SLI_REV4)
        ndlp->nlp_rpi = mb->un.varWords[0];
    ndlp->nlp_flag |= NLP_RPI_REGISTERED;
    ndlp->nlp_type |= NLP_FABRIC;
    lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);

    /*
     * Start issuing Fabric-Device Management Interface (FDMI) command to
     * 0xfffffa (FDMI well known port) or Delay issuing FDMI command if
     * fdmi-on=2 (supporting RPA/hostnmae)
     */

    if (vport->cfg_fdmi_on == 1)
        lpfc_fdmi_cmd(vport, ndlp, SLI_MGMT_DHBA);
    else
        mod_timer(&vport->fc_fdmitmo, jiffies + HZ * 60);

    /* decrement the node reference count held for this callback
     * function.
     */
    lpfc_nlp_put(ndlp);
    lpfc_mbuf_free(phba, mp->virt, mp->phys);
    kfree(mp);
    mempool_free(pmb, phba->mbox_mem_pool);

    return;
}

static int
lpfc_filter_by_rpi(struct lpfc_nodelist *ndlp, void *param)
{
    uint16_t *rpi = param;

    /* check for active node */
    if (!NLP_CHK_NODE_ACT(ndlp))
        return 0;

    return ndlp->nlp_rpi == *rpi;
}

static int
lpfc_filter_by_wwpn(struct lpfc_nodelist *ndlp, void *param)
{
    return memcmp(&ndlp->nlp_portname, param,
              sizeof(ndlp->nlp_portname)) == 0;
}

static struct lpfc_nodelist *
__lpfc_find_node(struct lpfc_vport *vport, node_filter filter, void *param)
{
    struct lpfc_nodelist *ndlp;

    list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
        if (filter(ndlp, param)) {
            lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
                     "3185 FIND node filter %p DID "
                     "Data: x%p x%x x%x\n",
                     filter, ndlp, ndlp->nlp_DID,
                     ndlp->nlp_flag);
            return ndlp;
        }
    }
    lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
             "3186 FIND node filter %p NOT FOUND.\n", filter);
    return NULL;
}

/*
 * This routine looks up the ndlp lists for the given RPI. If rpi found it
 * returns the node list element pointer else return NULL.
 */
struct lpfc_nodelist *
__lpfc_findnode_rpi(struct lpfc_vport *vport, uint16_t rpi)
{
    return __lpfc_find_node(vport, lpfc_filter_by_rpi, &rpi);
}

/*
 * This routine looks up the ndlp lists for the given WWPN. If WWPN found it
 * returns the node element list pointer else return NULL.
 */
struct lpfc_nodelist *
lpfc_findnode_wwpn(struct lpfc_vport *vport, struct lpfc_name *wwpn)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
    struct lpfc_nodelist *ndlp;

    spin_lock_irq(shost->host_lock);
    ndlp = __lpfc_find_node(vport, lpfc_filter_by_wwpn, wwpn);
    spin_unlock_irq(shost->host_lock);
    return ndlp;
}

/*
 * This routine looks up the ndlp lists for the given RPI. If the rpi
 * is found, the routine returns the node element list pointer else
 * return NULL.
 */
struct lpfc_nodelist *
lpfc_findnode_rpi(struct lpfc_vport *vport, uint16_t rpi)
{
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
    struct lpfc_nodelist *ndlp;

    spin_lock_irq(shost->host_lock);
    ndlp = __lpfc_findnode_rpi(vport, rpi);
    spin_unlock_irq(shost->host_lock);
    return ndlp;
}

struct lpfc_vport *
lpfc_find_vport_by_vpid(struct lpfc_hba *phba, uint16_t vpi)
{
    struct lpfc_vport *vport;
    unsigned long flags;
    int i = 0;

    /* The physical ports are always vpi 0 - translate is unnecessary. */
    if (vpi > 0) {
        /*
         * Translate the physical vpi to the logical vpi.  The
         * vport stores the logical vpi.
         */
        for (i = 0; i < phba->max_vpi; i++) {
            if (vpi == phba->vpi_ids[i])
                break;
        }

        if (i >= phba->max_vpi) {
            lpfc_printf_log(phba, KERN_ERR, LOG_ELS,
                     "2936 Could not find Vport mapped "
                     "to vpi %d\n", vpi);
            return NULL;
        }
    }

    spin_lock_irqsave(&phba->hbalock, flags);
    list_for_each_entry(vport, &phba->port_list, listentry) {
        if (vport->vpi == i) {
            spin_unlock_irqrestore(&phba->hbalock, flags);
            return vport;
        }
    }
    spin_unlock_irqrestore(&phba->hbalock, flags);
    return NULL;
}

void
lpfc_nlp_init(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
          uint32_t did)
{
    memset(ndlp, 0, sizeof (struct lpfc_nodelist));

    lpfc_initialize_node(vport, ndlp, did);
    INIT_LIST_HEAD(&ndlp->nlp_listp);

    lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
        "node init:       did:x%x",
        ndlp->nlp_DID, 0, 0);

    return;
}

/* This routine releases all resources associated with a specifc NPort's ndlp
 * and mempool_free's the nodelist.
 */
static void
lpfc_nlp_release(struct kref *kref)
{
    struct lpfc_hba *phba;
    unsigned long flags;
    struct lpfc_nodelist *ndlp = container_of(kref, struct lpfc_nodelist,
                          kref);

    lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
        "node release:    did:x%x flg:x%x type:x%x",
        ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);

    lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
            "0279 lpfc_nlp_release: ndlp:x%p did %x "
            "usgmap:x%x refcnt:%d\n",
            (void *)ndlp, ndlp->nlp_DID, ndlp->nlp_usg_map,
            atomic_read(&ndlp->kref.refcount));

    /* remove ndlp from action. */
    lpfc_nlp_remove(ndlp->vport, ndlp);

    /* clear the ndlp active flag for all release cases */
    phba = ndlp->phba;
    spin_lock_irqsave(&phba->ndlp_lock, flags);
    NLP_CLR_NODE_ACT(ndlp);
    spin_unlock_irqrestore(&phba->ndlp_lock, flags);
    if (phba->sli_rev == LPFC_SLI_REV4)
        lpfc_sli4_free_rpi(phba, ndlp->nlp_rpi);

    /* free ndlp memory for final ndlp release */
    if (NLP_CHK_FREE_REQ(ndlp)) {
        kfree(ndlp->lat_data);
        mempool_free(ndlp, ndlp->phba->nlp_mem_pool);
    }
}

/* This routine bumps the reference count for a ndlp structure to ensure
 * that one discovery thread won't free a ndlp while another discovery thread
 * is using it.
 */
struct lpfc_nodelist *
lpfc_nlp_get(struct lpfc_nodelist *ndlp)
{
    struct lpfc_hba *phba;
    unsigned long flags;

    if (ndlp) {
        lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
            "node get:        did:x%x flg:x%x refcnt:x%x",
            ndlp->nlp_DID, ndlp->nlp_flag,
            atomic_read(&ndlp->kref.refcount));
        /* The check of ndlp usage to prevent incrementing the
         * ndlp reference count that is in the process of being
         * released.
         */
        phba = ndlp->phba;
        spin_lock_irqsave(&phba->ndlp_lock, flags);
        if (!NLP_CHK_NODE_ACT(ndlp) || NLP_CHK_FREE_ACK(ndlp)) {
            spin_unlock_irqrestore(&phba->ndlp_lock, flags);
            lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_NODE,
                "0276 lpfc_nlp_get: ndlp:x%p "
                "usgmap:x%x refcnt:%d\n",
                (void *)ndlp, ndlp->nlp_usg_map,
                atomic_read(&ndlp->kref.refcount));
            return NULL;
        } else
            kref_get(&ndlp->kref);
        spin_unlock_irqrestore(&phba->ndlp_lock, flags);
    }
    return ndlp;
}

/* This routine decrements the reference count for a ndlp structure. If the
 * count goes to 0, this indicates the the associated nodelist should be
 * freed. Returning 1 indicates the ndlp resource has been released; on the
 * other hand, returning 0 indicates the ndlp resource has not been released
 * yet.
 */
int
lpfc_nlp_put(struct lpfc_nodelist *ndlp)
{
    struct lpfc_hba *phba;
    unsigned long flags;

    if (!ndlp)
        return 1;

    lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
    "node put:        did:x%x flg:x%x refcnt:x%x",
        ndlp->nlp_DID, ndlp->nlp_flag,
        atomic_read(&ndlp->kref.refcount));
    phba = ndlp->phba;
    spin_lock_irqsave(&phba->ndlp_lock, flags);
    /* Check the ndlp memory free acknowledge flag to avoid the
     * possible race condition that kref_put got invoked again
     * after previous one has done ndlp memory free.
     */
    if (NLP_CHK_FREE_ACK(ndlp)) {
        spin_unlock_irqrestore(&phba->ndlp_lock, flags);
        lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_NODE,
                "0274 lpfc_nlp_put: ndlp:x%p "
                "usgmap:x%x refcnt:%d\n",
                (void *)ndlp, ndlp->nlp_usg_map,
                atomic_read(&ndlp->kref.refcount));
        return 1;
    }
    /* Check the ndlp inactivate log flag to avoid the possible
     * race condition that kref_put got invoked again after ndlp
     * is already in inactivating state.
     */
    if (NLP_CHK_IACT_REQ(ndlp)) {
        spin_unlock_irqrestore(&phba->ndlp_lock, flags);
        lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_NODE,
                "0275 lpfc_nlp_put: ndlp:x%p "
                "usgmap:x%x refcnt:%d\n",
                (void *)ndlp, ndlp->nlp_usg_map,
                atomic_read(&ndlp->kref.refcount));
        return 1;
    }
    /* For last put, mark the ndlp usage flags to make sure no
     * other kref_get and kref_put on the same ndlp shall get
     * in between the process when the final kref_put has been
     * invoked on this ndlp.
     */
    if (atomic_read(&ndlp->kref.refcount) == 1) {
        /* Indicate ndlp is put to inactive state. */
        NLP_SET_IACT_REQ(ndlp);
        /* Acknowledge ndlp memory free has been seen. */
        if (NLP_CHK_FREE_REQ(ndlp))
            NLP_SET_FREE_ACK(ndlp);
    }
    spin_unlock_irqrestore(&phba->ndlp_lock, flags);
    /* Note, the kref_put returns 1 when decrementing a reference
     * count that was 1, it invokes the release callback function,
     * but it still left the reference count as 1 (not actually
     * performs the last decrementation). Otherwise, it actually
     * decrements the reference count and returns 0.
     */
    return kref_put(&ndlp->kref, lpfc_nlp_release);
}

/* This routine free's the specified nodelist if it is not in use
 * by any other discovery thread. This routine returns 1 if the
 * ndlp has been freed. A return value of 0 indicates the ndlp is
 * not yet been released.
 */
int
lpfc_nlp_not_used(struct lpfc_nodelist *ndlp)
{
    lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
        "node not used:   did:x%x flg:x%x refcnt:x%x",
        ndlp->nlp_DID, ndlp->nlp_flag,
        atomic_read(&ndlp->kref.refcount));
    if (atomic_read(&ndlp->kref.refcount) == 1)
        if (lpfc_nlp_put(ndlp))
            return 1;
    return 0;
}

static int
lpfc_fcf_inuse(struct lpfc_hba *phba)
{
    struct lpfc_vport **vports;
    int i, ret = 0;
    struct lpfc_nodelist *ndlp;
    struct Scsi_Host  *shost;

    vports = lpfc_create_vport_work_array(phba);

    /* If driver cannot allocate memory, indicate fcf is in use */
    if (!vports)
        return 1;

    for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
        shost = lpfc_shost_from_vport(vports[i]);
        spin_lock_irq(shost->host_lock);
        /*
         * IF the CVL_RCVD bit is not set then we have sent the
         * flogi.
         * If dev_loss fires while we are waiting we do not want to
         * unreg the fcf.
         */
        if (!(vports[i]->fc_flag & FC_VPORT_CVL_RCVD)) {
            spin_unlock_irq(shost->host_lock);
            ret =  1;
            goto out;
        }
        list_for_each_entry(ndlp, &vports[i]->fc_nodes, nlp_listp) {
            if (NLP_CHK_NODE_ACT(ndlp) && ndlp->rport &&
              (ndlp->rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
                ret = 1;
                spin_unlock_irq(shost->host_lock);
                goto out;
            } else if (ndlp->nlp_flag & NLP_RPI_REGISTERED) {
                ret = 1;
                lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
                        "2624 RPI %x DID %x flag %x "
                        "still logged in\n",
                        ndlp->nlp_rpi, ndlp->nlp_DID,
                        ndlp->nlp_flag);
            }
        }
        spin_unlock_irq(shost->host_lock);
    }
out:
    lpfc_destroy_vport_work_array(phba, vports);
    return ret;
}

void
lpfc_unregister_vfi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
    struct lpfc_vport *vport = mboxq->vport;
    struct Scsi_Host *shost = lpfc_shost_from_vport(vport);

    if (mboxq->u.mb.mbxStatus) {
        lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY|LOG_MBOX,
            "2555 UNREG_VFI mbxStatus error x%x "
            "HBA state x%x\n",
            mboxq->u.mb.mbxStatus, vport->port_state);
    }
    spin_lock_irq(shost->host_lock);
    phba->pport->fc_flag &= ~FC_VFI_REGISTERED;
    spin_unlock_irq(shost->host_lock);
    mempool_free(mboxq, phba->mbox_mem_pool);
    return;
}

static void
lpfc_unregister_fcfi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
    struct lpfc_vport *vport = mboxq->vport;

    if (mboxq->u.mb.mbxStatus) {
        lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY|LOG_MBOX,
            "2550 UNREG_FCFI mbxStatus error x%x "
            "HBA state x%x\n",
            mboxq->u.mb.mbxStatus, vport->port_state);
    }
    mempool_free(mboxq, phba->mbox_mem_pool);
    return;
}

int
lpfc_unregister_fcf_prep(struct lpfc_hba *phba)
{
    struct lpfc_vport **vports;
    struct lpfc_nodelist *ndlp;
    struct Scsi_Host *shost;
    int i, rc;

    /* Unregister RPIs */
    if (lpfc_fcf_inuse(phba))
        lpfc_unreg_hba_rpis(phba);

    /* At this point, all discovery is aborted */
    phba->pport->port_state = LPFC_VPORT_UNKNOWN;

    /* Unregister VPIs */
    vports = lpfc_create_vport_work_array(phba);
    if (vports && (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED))
        for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
            /* Stop FLOGI/FDISC retries */
            ndlp = lpfc_findnode_did(vports[i], Fabric_DID);
            if (ndlp)
                lpfc_cancel_retry_delay_tmo(vports[i], ndlp);
            lpfc_cleanup_pending_mbox(vports[i]);
            if (phba->sli_rev == LPFC_SLI_REV4)
                lpfc_sli4_unreg_all_rpis(vports[i]);
            lpfc_mbx_unreg_vpi(vports[i]);
            shost = lpfc_shost_from_vport(vports[i]);
            spin_lock_irq(shost->host_lock);
            vports[i]->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
            vports[i]->vpi_state &= ~LPFC_VPI_REGISTERED;
            spin_unlock_irq(shost->host_lock);
        }
    lpfc_destroy_vport_work_array(phba, vports);

    /* Cleanup any outstanding ELS commands */
    lpfc_els_flush_all_cmd(phba);

    /* Unregister the physical port VFI */
    rc = lpfc_issue_unreg_vfi(phba->pport);
    return rc;
}

int
lpfc_sli4_unregister_fcf(struct lpfc_hba *phba)
{
    LPFC_MBOXQ_t *mbox;
    int rc;

    mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
    if (!mbox) {
        lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY|LOG_MBOX,
                "2551 UNREG_FCFI mbox allocation failed"
                "HBA state x%x\n", phba->pport->port_state);
        return -ENOMEM;
    }
    lpfc_unreg_fcfi(mbox, phba->fcf.fcfi);
    mbox->vport = phba->pport;
    mbox->mbox_cmpl = lpfc_unregister_fcfi_cmpl;
    rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);

    if (rc == MBX_NOT_FINISHED) {
        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                "2552 Unregister FCFI command failed rc x%x "
                "HBA state x%x\n",
                rc, phba->pport->port_state);
        return -EINVAL;
    }
    return 0;
}

void
lpfc_unregister_fcf_rescan(struct lpfc_hba *phba)
{
    int rc;

    /* Preparation for unregistering fcf */
    rc = lpfc_unregister_fcf_prep(phba);
    if (rc) {
        lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
                "2748 Failed to prepare for unregistering "
                "HBA's FCF record: rc=%d\n", rc);
        return;
    }

    /* Now, unregister FCF record and reset HBA FCF state */
    rc = lpfc_sli4_unregister_fcf(phba);
    if (rc)
        return;
    /* Reset HBA FCF states after successful unregister FCF */
    phba->fcf.fcf_flag = 0;
    phba->fcf.current_rec.flag = 0;

    /*
     * If driver is not unloading, check if there is any other
     * FCF record that can be used for discovery.
     */
    if ((phba->pport->load_flag & FC_UNLOADING) ||
        (phba->link_state < LPFC_LINK_UP))
        return;

    /* This is considered as the initial FCF discovery scan */
    spin_lock_irq(&phba->hbalock);
    phba->fcf.fcf_flag |= FCF_INIT_DISC;
    spin_unlock_irq(&phba->hbalock);

    /* Reset FCF roundrobin bmask for new discovery */
    lpfc_sli4_clear_fcf_rr_bmask(phba);

    rc = lpfc_sli4_fcf_scan_read_fcf_rec(phba, LPFC_FCOE_FCF_GET_FIRST);

    if (rc) {
        spin_lock_irq(&phba->hbalock);
        phba->fcf.fcf_flag &= ~FCF_INIT_DISC;
        spin_unlock_irq(&phba->hbalock);
        lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY|LOG_MBOX,
                "2553 lpfc_unregister_unused_fcf failed "
                "to read FCF record HBA state x%x\n",
                phba->pport->port_state);
    }
}

void
lpfc_unregister_fcf(struct lpfc_hba *phba)
{
    int rc;

    /* Preparation for unregistering fcf */
    rc = lpfc_unregister_fcf_prep(phba);
    if (rc) {
        lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
                "2749 Failed to prepare for unregistering "
                "HBA's FCF record: rc=%d\n", rc);
        return;
    }

    /* Now, unregister FCF record and reset HBA FCF state */
    rc = lpfc_sli4_unregister_fcf(phba);
    if (rc)
        return;
    /* Set proper HBA FCF states after successful unregister FCF */
    spin_lock_irq(&phba->hbalock);
    phba->fcf.fcf_flag &= ~FCF_REGISTERED;
    spin_unlock_irq(&phba->hbalock);
}

void
lpfc_unregister_unused_fcf(struct lpfc_hba *phba)
{
    /*
     * If HBA is not running in FIP mode, if HBA does not support
     * FCoE, if FCF discovery is ongoing, or if FCF has not been
     * registered, do nothing.
     */
    spin_lock_irq(&phba->hbalock);
    if (!(phba->hba_flag & HBA_FCOE_MODE) ||
        !(phba->fcf.fcf_flag & FCF_REGISTERED) ||
        !(phba->hba_flag & HBA_FIP_SUPPORT) ||
        (phba->fcf.fcf_flag & FCF_DISCOVERY) ||
        (phba->pport->port_state == LPFC_FLOGI)) {
        spin_unlock_irq(&phba->hbalock);
        return;
    }
    spin_unlock_irq(&phba->hbalock);

    if (lpfc_fcf_inuse(phba))
        return;

    lpfc_unregister_fcf_rescan(phba);
}

static void
lpfc_read_fcf_conn_tbl(struct lpfc_hba *phba,
    uint8_t *buff)
{
    struct lpfc_fcf_conn_entry *conn_entry, *next_conn_entry;
    struct lpfc_fcf_conn_hdr *conn_hdr;
    struct lpfc_fcf_conn_rec *conn_rec;
    uint32_t record_count;
    int i;

    /* Free the current connect table */
    list_for_each_entry_safe(conn_entry, next_conn_entry,
        &phba->fcf_conn_rec_list, list) {
        list_del_init(&conn_entry->list);
        kfree(conn_entry);
    }

    conn_hdr = (struct lpfc_fcf_conn_hdr *) buff;
    record_count = conn_hdr->length * sizeof(uint32_t)/
        sizeof(struct lpfc_fcf_conn_rec);

    conn_rec = (struct lpfc_fcf_conn_rec *)
        (buff + sizeof(struct lpfc_fcf_conn_hdr));

    for (i = 0; i < record_count; i++) {
        if (!(conn_rec[i].flags & FCFCNCT_VALID))
            continue;
        conn_entry = kzalloc(sizeof(struct lpfc_fcf_conn_entry),
            GFP_KERNEL);
        if (!conn_entry) {
            lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                "2566 Failed to allocate connection"
                " table entry\n");
            return;
        }

        memcpy(&conn_entry->conn_rec, &conn_rec[i],
            sizeof(struct lpfc_fcf_conn_rec));
        conn_entry->conn_rec.vlan_tag =
            le16_to_cpu(conn_entry->conn_rec.vlan_tag) & 0xFFF;
        conn_entry->conn_rec.flags =
            le16_to_cpu(conn_entry->conn_rec.flags);
        list_add_tail(&conn_entry->list,
            &phba->fcf_conn_rec_list);
    }
}

static void
lpfc_read_fcoe_param(struct lpfc_hba *phba,
            uint8_t *buff)
{
    struct lpfc_fip_param_hdr *fcoe_param_hdr;
    struct lpfc_fcoe_params *fcoe_param;

    fcoe_param_hdr = (struct lpfc_fip_param_hdr *)
        buff;
    fcoe_param = (struct lpfc_fcoe_params *)
        (buff + sizeof(struct lpfc_fip_param_hdr));

    if ((fcoe_param_hdr->parm_version != FIPP_VERSION) ||
        (fcoe_param_hdr->length != FCOE_PARAM_LENGTH))
        return;

    if (fcoe_param_hdr->parm_flags & FIPP_VLAN_VALID) {
        phba->valid_vlan = 1;
        phba->vlan_id = le16_to_cpu(fcoe_param->vlan_tag) &
            0xFFF;
    }

    phba->fc_map[0] = fcoe_param->fc_map[0];
    phba->fc_map[1] = fcoe_param->fc_map[1];
    phba->fc_map[2] = fcoe_param->fc_map[2];
    return;
}

static uint8_t *
lpfc_get_rec_conf23(uint8_t *buff, uint32_t size, uint8_t rec_type)
{
    uint32_t offset = 0, rec_length;

    if ((buff[0] == LPFC_REGION23_LAST_REC) ||
        (size < sizeof(uint32_t)))
        return NULL;

    rec_length = buff[offset + 1];

    /*
     * One TLV record has one word header and number of data words
     * specified in the rec_length field of the record header.
     */
    while ((offset + rec_length * sizeof(uint32_t) + sizeof(uint32_t))
        <= size) {
        if (buff[offset] == rec_type)
            return &buff[offset];

        if (buff[offset] == LPFC_REGION23_LAST_REC)
            return NULL;

        offset += rec_length * sizeof(uint32_t) + sizeof(uint32_t);
        rec_length = buff[offset + 1];
    }
    return NULL;
}

void
lpfc_parse_fcoe_conf(struct lpfc_hba *phba,
        uint8_t *buff,
        uint32_t size)
{
    uint32_t offset = 0, rec_length;
    uint8_t *rec_ptr;

    /*
     * If data size is less than 2 words signature and version cannot be
     * verified.
     */
    if (size < 2*sizeof(uint32_t))
        return;

    /* Check the region signature first */
    if (memcmp(buff, LPFC_REGION23_SIGNATURE, 4)) {
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
            "2567 Config region 23 has bad signature\n");
        return;
    }

    offset += 4;

    /* Check the data structure version */
    if (buff[offset] != LPFC_REGION23_VERSION) {
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
            "2568 Config region 23 has bad version\n");
        return;
    }
    offset += 4;

    rec_length = buff[offset + 1];

    /* Read FCoE param record */
    rec_ptr = lpfc_get_rec_conf23(&buff[offset],
            size - offset, FCOE_PARAM_TYPE);
    if (rec_ptr)
        lpfc_read_fcoe_param(phba, rec_ptr);

    /* Read FCF connection table */
    rec_ptr = lpfc_get_rec_conf23(&buff[offset],
        size - offset, FCOE_CONN_TBL_TYPE);
    if (rec_ptr)
        lpfc_read_fcf_conn_tbl(phba, rec_ptr);

}