[pandora-kernel.git] / drivers / scsi / lpfc / lpfc_hbadisc.c

/*******************************************************************
 * 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;

        evtp->evt_arg1  = lpfc_nlp_get(ndlp);

        spin_lock_irq(&phba->hbalock);
        /* We need to hold the node by incrementing the reference
         * count until this queued work is done
         */
        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;
}

/**
 * lpfc_dev_loss_tmo_handler - Remote node devloss timeout handler
 * @ndlp: Pointer to remote node object.
 *
 * This function is called from the worker thread when devloss timeout timer
 * expires. For SLI4 host, this routine shall return 1 when at lease one
 * remote node, including this @ndlp, is still in use of FCF; otherwise, this
 * routine shall return 0 when there is no remote node is still in use of FCF
 * when devloss timeout happened to this @ndlp.
 **/
static int
lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp)
{
        struct lpfc_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;
}

/**
 * lpfc_sli4_post_dev_loss_tmo_handler - SLI4 post devloss timeout handler
 * @phba: Pointer to hba context object.
 * @fcf_inuse: SLI4 FCF in-use state reported from devloss timeout handler.
 * @nlp_did: remote node identifer with devloss timeout.
 *
 * This function is called from the worker thread after invoking devloss
 * timeout handler and releasing the reference count for the ndlp with
 * which the devloss timeout was handled for SLI4 host. For the devloss
 * timeout of the last remote node which had been in use of FCF, when this
 * routine is invoked, it shall be guaranteed that none of the remote are
 * in-use of FCF. When devloss timeout to the last remote using the FCF,
 * if the FIP engine is neither in FCF table scan process nor roundrobin
 * failover process, the in-use FCF shall be unregistered. If the FIP
 * engine is in FCF discovery process, the devloss timeout state shall
 * be set for either the FCF table scan process or roundrobin failover
 * process to unregister the in-use FCF.
 **/
static void
lpfc_sli4_post_dev_loss_tmo_handler(struct lpfc_hba *phba, int fcf_inuse,
                                    uint32_t nlp_did)
{
        /* If devloss timeout happened to a remote node when FCF had no
         * longer been in-use, do nothing.
         */
        if (!fcf_inuse)
                return;

        if ((phba->hba_flag & HBA_FIP_SUPPORT) && !lpfc_fcf_inuse(phba)) {
                spin_lock_irq(&phba->hbalock);
                if (phba->fcf.fcf_flag & FCF_DISCOVERY) {
                        if (phba->hba_flag & HBA_DEVLOSS_TMO) {
                                spin_unlock_irq(&phba->hbalock);
                                return;
                        }
                        phba->hba_flag |= HBA_DEVLOSS_TMO;
                        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                                        "2847 Last remote node (x%x) using "
                                        "FCF devloss tmo\n", nlp_did);
                }
                if (phba->fcf.fcf_flag & FCF_REDISC_PROG) {
                        spin_unlock_irq(&phba->hbalock);
                        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                                        "2868 Devloss tmo to FCF rediscovery "
                                        "in progress\n");
                        return;
                }
                if (!(phba->hba_flag & (FCF_TS_INPROG | FCF_RR_INPROG))) {
                        spin_unlock_irq(&phba->hbalock);
                        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                                        "2869 Devloss tmo to idle FIP engine, "
                                        "unreg in-use FCF and rescan.\n");
                        /* Unregister in-use FCF and rescan */
                        lpfc_unregister_fcf_rescan(phba);
                        return;
                }
                spin_unlock_irq(&phba->hbalock);
                if (phba->hba_flag & FCF_TS_INPROG)
                        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                                        "2870 FCF table scan in progress\n");
                if (phba->hba_flag & FCF_RR_INPROG)
                        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                                        "2871 FLOGI roundrobin FCF failover "
                                        "in progress\n");
        }
        lpfc_unregister_unused_fcf(phba);
}

/**
 * lpfc_alloc_fast_evt - Allocates data structure for posting event
 * @phba: Pointer to hba context object.
 *
 * This function is called from the functions which need to post
 * events from interrupt context. This function allocates data
 * structure required for posting event. It also keeps track of
 * number of events pending and prevent event storm when there are
 * too many events.
 **/
struct lpfc_fast_path_event *
lpfc_alloc_fast_evt(struct lpfc_hba *phba) {
        struct lpfc_fast_path_event *ret;

        /* If there are lot of fast event do not exhaust memory due to this */
        if (atomic_read(&phba->fast_event_count) > LPFC_MAX_EVT_COUNT)
                return NULL;

        ret = kzalloc(sizeof(struct lpfc_fast_path_event),
                        GFP_ATOMIC);
        if (ret) {
                atomic_inc(&phba->fast_event_count);
                INIT_LIST_HEAD(&ret->work_evt.evt_listp);
                ret->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
        }
        return ret;
}

/**
 * lpfc_free_fast_evt - Frees event data structure
 * @phba: Pointer to hba context object.
 * @evt:  Event object which need to be freed.
 *
 * This function frees the data structure required for posting
 * events.
 **/
void
lpfc_free_fast_evt(struct lpfc_hba *phba,
                struct lpfc_fast_path_event *evt) {

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

/**
 * lpfc_send_fastpath_evt - Posts events generated from fast path
 * @phba: Pointer to hba context object.
 * @evtp: Event data structure.
 *
 * This function is called from worker thread, when the interrupt
 * context need to post an event. This function posts the event
 * to fc transport netlink interface.
 **/
static void
lpfc_send_fastpath_evt(struct lpfc_hba *phba,
                struct lpfc_work_evt *evtp)
{
        unsigned long evt_category, evt_sub_category;
        struct lpfc_fast_path_event *fast_evt_data;
        char *evt_data;
        uint32_t evt_data_size;
        struct Scsi_Host *shost;

        fast_evt_data = container_of(evtp, struct lpfc_fast_path_event,
                work_evt);

        evt_category = (unsigned long) fast_evt_data->un.fabric_evt.event_type;
        evt_sub_category = (unsigned long) fast_evt_data->un.
                        fabric_evt.subcategory;
        shost = lpfc_shost_from_vport(fast_evt_data->vport);
        if (evt_category == FC_REG_FABRIC_EVENT) {
                if (evt_sub_category == LPFC_EVENT_FCPRDCHKERR) {
                        evt_data = (char *) &fast_evt_data->un.read_check_error;
                        evt_data_size = sizeof(fast_evt_data->un.
                                read_check_error);
                } else if ((evt_sub_category == LPFC_EVENT_FABRIC_BUSY) ||
                        (evt_sub_category == LPFC_EVENT_PORT_BUSY)) {
                        evt_data = (char *) &fast_evt_data->un.fabric_evt;
                        evt_data_size = sizeof(fast_evt_data->un.fabric_evt);
                } else {
                        lpfc_free_fast_evt(phba, fast_evt_data);
                        return;
                }
        } else if (evt_category == FC_REG_SCSI_EVENT) {
                switch (evt_sub_category) {
                case LPFC_EVENT_QFULL:
                case LPFC_EVENT_DEVBSY:
                        evt_data = (char *) &fast_evt_data->un.scsi_evt;
                        evt_data_size = sizeof(fast_evt_data->un.scsi_evt);
                        break;
                case LPFC_EVENT_CHECK_COND:
                        evt_data = (char *) &fast_evt_data->un.check_cond_evt;
                        evt_data_size =  sizeof(fast_evt_data->un.
                                check_cond_evt);
                        break;
                case LPFC_EVENT_VARQUEDEPTH:
                        evt_data = (char *) &fast_evt_data->un.queue_depth_evt;
                        evt_data_size = sizeof(fast_evt_data->un.
                                queue_depth_evt);
                        break;
                default:
                        lpfc_free_fast_evt(phba, fast_evt_data);
                        return;
                }
        } else {
                lpfc_free_fast_evt(phba, fast_evt_data);
                return;
        }

        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 {
                        if (phba->link_state >= LPFC_LINK_UP) {
                                pring->flag &= ~LPFC_DEFERRED_RING_EVENT;
                                lpfc_sli_handle_slow_ring_event(phba, pring,
                                                                (status &
                                                                HA_RXMASK));
                        }
                }
                if ((phba->sli_rev == LPFC_SLI_REV4) &
                                 (!list_empty(&pring->txq)))
                        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;
}

/**
 * lpfc_sli4_clear_fcf_rr_bmask
 * @phba pointer to the struct lpfc_hba for this port.
 * This fucnction resets the round robin bit mask and clears the
 * fcf priority list. The list deletions are done while holding the
 * hbalock. The ON_LIST flag and the FLOGI_FAILED flags are cleared
 * from the lpfc_fcf_pri record.
 **/
void
lpfc_sli4_clear_fcf_rr_bmask(struct lpfc_hba *phba)
{
        struct lpfc_fcf_pri *fcf_pri;
        struct lpfc_fcf_pri *next_fcf_pri;
        memset(phba->fcf.fcf_rr_bmask, 0, sizeof(*phba->fcf.fcf_rr_bmask));
        spin_lock_irq(&phba->hbalock);
        list_for_each_entry_safe(fcf_pri, next_fcf_pri,
                                &phba->fcf.fcf_pri_list, list) {
                list_del_init(&fcf_pri->list);
                fcf_pri->fcf_rec.flag = 0;
        }
        spin_unlock_irq(&phba->hbalock);
}
static void
lpfc_mbx_cmpl_reg_fcfi(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
        struct lpfc_vport *vport = mboxq->vport;

        if (mboxq->u.mb.mbxStatus) {
                lpfc_printf_vlog(vport, KERN_ERR, LOG_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);
}

/**
 * lpfc_fab_name_match - Check if the fcf fabric name match.
 * @fab_name: pointer to fabric name.
 * @new_fcf_record: pointer to fcf record.
 *
 * This routine compare the fcf record's fabric name with provided
 * fabric name. If the fabric name are identical this function
 * returns 1 else return 0.
 **/
static uint32_t
lpfc_fab_name_match(uint8_t *fab_name, struct fcf_record *new_fcf_record)
{
        if (fab_name[0] != bf_get(lpfc_fcf_record_fab_name_0, new_fcf_record))
                return 0;
        if (fab_name[1] != bf_get(lpfc_fcf_record_fab_name_1, new_fcf_record))
                return 0;
        if (fab_name[2] != bf_get(lpfc_fcf_record_fab_name_2, new_fcf_record))
                return 0;
        if (fab_name[3] != bf_get(lpfc_fcf_record_fab_name_3, new_fcf_record))
                return 0;
        if (fab_name[4] != bf_get(lpfc_fcf_record_fab_name_4, new_fcf_record))
                return 0;
        if (fab_name[5] != bf_get(lpfc_fcf_record_fab_name_5, new_fcf_record))
                return 0;
        if (fab_name[6] != bf_get(lpfc_fcf_record_fab_name_6, new_fcf_record))
                return 0;
        if (fab_name[7] != bf_get(lpfc_fcf_record_fab_name_7, new_fcf_record))
                return 0;
        return 1;
}

/**
 * lpfc_sw_name_match - Check if the fcf switch name match.
 * @fab_name: pointer to fabric name.
 * @new_fcf_record: pointer to fcf record.
 *
 * This routine compare the fcf record's switch name with provided
 * switch name. If the switch name are identical this function
 * returns 1 else return 0.
 **/
static uint32_t
lpfc_sw_name_match(uint8_t *sw_name, struct fcf_record *new_fcf_record)
{
        if (sw_name[0] != bf_get(lpfc_fcf_record_switch_name_0, new_fcf_record))
                return 0;
        if (sw_name[1] != bf_get(lpfc_fcf_record_switch_name_1, new_fcf_record))
                return 0;
        if (sw_name[2] != bf_get(lpfc_fcf_record_switch_name_2, new_fcf_record))
                return 0;
        if (sw_name[3] != bf_get(lpfc_fcf_record_switch_name_3, new_fcf_record))
                return 0;
        if (sw_name[4] != bf_get(lpfc_fcf_record_switch_name_4, new_fcf_record))
                return 0;
        if (sw_name[5] != bf_get(lpfc_fcf_record_switch_name_5, new_fcf_record))
                return 0;
        if (sw_name[6] != bf_get(lpfc_fcf_record_switch_name_6, new_fcf_record))
                return 0;
        if (sw_name[7] != bf_get(lpfc_fcf_record_switch_name_7, new_fcf_record))
                return 0;
        return 1;
}

/**
 * lpfc_mac_addr_match - Check if the fcf mac address match.
 * @mac_addr: pointer to mac address.
 * @new_fcf_record: pointer to fcf record.
 *
 * This routine compare the fcf record's mac address with HBA's
 * FCF mac address. If the mac addresses are identical this function
 * returns 1 else return 0.
 **/
static uint32_t
lpfc_mac_addr_match(uint8_t *mac_addr, struct fcf_record *new_fcf_record)
{
        if (mac_addr[0] != bf_get(lpfc_fcf_record_mac_0, new_fcf_record))
                return 0;
        if (mac_addr[1] != bf_get(lpfc_fcf_record_mac_1, new_fcf_record))
                return 0;
        if (mac_addr[2] != bf_get(lpfc_fcf_record_mac_2, new_fcf_record))
                return 0;
        if (mac_addr[3] != bf_get(lpfc_fcf_record_mac_3, new_fcf_record))
                return 0;
        if (mac_addr[4] != bf_get(lpfc_fcf_record_mac_4, new_fcf_record))
                return 0;
        if (mac_addr[5] != bf_get(lpfc_fcf_record_mac_5, new_fcf_record))
                return 0;
        return 1;
}

static bool
lpfc_vlan_id_match(uint16_t curr_vlan_id, uint16_t new_vlan_id)
{
        return (curr_vlan_id == new_vlan_id);
}

/**
 * lpfc_update_fcf_record - Update driver fcf record
 * __lpfc_update_fcf_record_pri - update the lpfc_fcf_pri record.
 * @phba: pointer to lpfc hba data structure.
 * @fcf_index: Index for the lpfc_fcf_record.
 * @new_fcf_record: pointer to hba fcf record.
 *
 * This routine updates the driver FCF priority record from the new HBA FCF
 * record. This routine is called with the host lock held.
 **/
static void
__lpfc_update_fcf_record_pri(struct lpfc_hba *phba, uint16_t fcf_index,
                                 struct fcf_record *new_fcf_record
                                 )
{
        struct lpfc_fcf_pri *fcf_pri;

        fcf_pri = &phba->fcf.fcf_pri[fcf_index];
        fcf_pri->fcf_rec.fcf_index = fcf_index;
        /* FCF record priority */
        fcf_pri->fcf_rec.priority = new_fcf_record->fip_priority;

}

/**
 * lpfc_copy_fcf_record - Copy fcf information to lpfc_hba.
 * @fcf: pointer to driver fcf record.
 * @new_fcf_record: pointer to fcf record.
 *
 * This routine copies the FCF information from the FCF
 * record to lpfc_hba data structure.
 **/
static void
lpfc_copy_fcf_record(struct lpfc_fcf_rec *fcf_rec,
                     struct fcf_record *new_fcf_record)
{
        /* Fabric name */
        fcf_rec->fabric_name[0] =
                bf_get(lpfc_fcf_record_fab_name_0, new_fcf_record);
        fcf_rec->fabric_name[1] =
                bf_get(lpfc_fcf_record_fab_name_1, new_fcf_record);
        fcf_rec->fabric_name[2] =
                bf_get(lpfc_fcf_record_fab_name_2, new_fcf_record);
        fcf_rec->fabric_name[3] =
                bf_get(lpfc_fcf_record_fab_name_3, new_fcf_record);
        fcf_rec->fabric_name[4] =
                bf_get(lpfc_fcf_record_fab_name_4, new_fcf_record);
        fcf_rec->fabric_name[5] =
                bf_get(lpfc_fcf_record_fab_name_5, new_fcf_record);
        fcf_rec->fabric_name[6] =
                bf_get(lpfc_fcf_record_fab_name_6, new_fcf_record);
        fcf_rec->fabric_name[7] =
                bf_get(lpfc_fcf_record_fab_name_7, new_fcf_record);
        /* Mac address */
        fcf_rec->mac_addr[0] = bf_get(lpfc_fcf_record_mac_0, new_fcf_record);
        fcf_rec->mac_addr[1] = bf_get(lpfc_fcf_record_mac_1, new_fcf_record);
        fcf_rec->mac_addr[2] = bf_get(lpfc_fcf_record_mac_2, new_fcf_record);
        fcf_rec->mac_addr[3] = bf_get(lpfc_fcf_record_mac_3, new_fcf_record);
        fcf_rec->mac_addr[4] = bf_get(lpfc_fcf_record_mac_4, new_fcf_record);
        fcf_rec->mac_addr[5] = bf_get(lpfc_fcf_record_mac_5, new_fcf_record);
        /* FCF record index */
        fcf_rec->fcf_indx = bf_get(lpfc_fcf_record_fcf_index, new_fcf_record);
        /* FCF record priority */
        fcf_rec->priority = new_fcf_record->fip_priority;
        /* Switch name */
        fcf_rec->switch_name[0] =
                bf_get(lpfc_fcf_record_switch_name_0, new_fcf_record);
        fcf_rec->switch_name[1] =
                bf_get(lpfc_fcf_record_switch_name_1, new_fcf_record);
        fcf_rec->switch_name[2] =
                bf_get(lpfc_fcf_record_switch_name_2, new_fcf_record);
        fcf_rec->switch_name[3] =
                bf_get(lpfc_fcf_record_switch_name_3, new_fcf_record);
        fcf_rec->switch_name[4] =
                bf_get(lpfc_fcf_record_switch_name_4, new_fcf_record);
        fcf_rec->switch_name[5] =
                bf_get(lpfc_fcf_record_switch_name_5, new_fcf_record);
        fcf_rec->switch_name[6] =
                bf_get(lpfc_fcf_record_switch_name_6, new_fcf_record);
        fcf_rec->switch_name[7] =
                bf_get(lpfc_fcf_record_switch_name_7, new_fcf_record);
}

/**
 * lpfc_update_fcf_record - Update driver fcf record
 * @phba: pointer to lpfc hba data structure.
 * @fcf_rec: pointer to driver fcf record.
 * @new_fcf_record: pointer to hba fcf record.
 * @addr_mode: address mode to be set to the driver fcf record.
 * @vlan_id: vlan tag to be set to the driver fcf record.
 * @flag: flag bits to be set to the driver fcf record.
 *
 * This routine updates the driver FCF record from the new HBA FCF record
 * together with the address mode, vlan_id, and other informations. This
 * routine is called with the host lock held.
 **/
static void
__lpfc_update_fcf_record(struct lpfc_hba *phba, struct lpfc_fcf_rec *fcf_rec,
                       struct fcf_record *new_fcf_record, uint32_t addr_mode,
                       uint16_t vlan_id, uint32_t flag)
{
        /* Copy the fields from the HBA's FCF record */
        lpfc_copy_fcf_record(fcf_rec, new_fcf_record);
        /* Update other fields of driver FCF record */
        fcf_rec->addr_mode = addr_mode;
        fcf_rec->vlan_id = vlan_id;
        fcf_rec->flag |= (flag | RECORD_VALID);
        __lpfc_update_fcf_record_pri(phba,
                bf_get(lpfc_fcf_record_fcf_index, new_fcf_record),
                                 new_fcf_record);
}

/**
 * lpfc_register_fcf - Register the FCF with hba.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine issues a register fcfi mailbox command to register
 * the fcf with HBA.
 **/
static void
lpfc_register_fcf(struct lpfc_hba *phba)
{
        LPFC_MBOXQ_t *fcf_mbxq;
        int rc;

        spin_lock_irq(&phba->hbalock);
        /* If the FCF is not available do nothing. */
        if (!(phba->fcf.fcf_flag & FCF_AVAILABLE)) {
                phba->hba_flag &= ~(FCF_TS_INPROG | FCF_RR_INPROG);
                spin_unlock_irq(&phba->hbalock);
                return;
        }

        /* The FCF is already registered, start discovery */
        if (phba->fcf.fcf_flag & FCF_REGISTERED) {
                phba->fcf.fcf_flag |= (FCF_SCAN_DONE | FCF_IN_USE);
                phba->hba_flag &= ~FCF_TS_INPROG;
                if (phba->pport->port_state != LPFC_FLOGI &&
                    phba->pport->fc_flag & FC_FABRIC) {
                        phba->hba_flag |= FCF_RR_INPROG;
                        spin_unlock_irq(&phba->hbalock);
                        lpfc_initial_flogi(phba->pport);
                        return;
                }
                spin_unlock_irq(&phba->hbalock);
                return;
        }
        spin_unlock_irq(&phba->hbalock);

        fcf_mbxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!fcf_mbxq) {
                spin_lock_irq(&phba->hbalock);
                phba->hba_flag &= ~(FCF_TS_INPROG | FCF_RR_INPROG);
                spin_unlock_irq(&phba->hbalock);
                return;
        }

        lpfc_reg_fcfi(phba, fcf_mbxq);
        fcf_mbxq->vport = phba->pport;
        fcf_mbxq->mbox_cmpl = lpfc_mbx_cmpl_reg_fcfi;
        rc = lpfc_sli_issue_mbox(phba, fcf_mbxq, MBX_NOWAIT);
        if (rc == MBX_NOT_FINISHED) {
                spin_lock_irq(&phba->hbalock);
                phba->hba_flag &= ~(FCF_TS_INPROG | FCF_RR_INPROG);
                spin_unlock_irq(&phba->hbalock);
                mempool_free(fcf_mbxq, phba->mbox_mem_pool);
        }

        return;
}

/**
 * lpfc_match_fcf_conn_list - Check if the FCF record can be used for discovery.
 * @phba: pointer to lpfc hba data structure.
 * @new_fcf_record: pointer to fcf record.
 * @boot_flag: Indicates if this record used by boot bios.
 * @addr_mode: The address mode to be used by this FCF
 * @vlan_id: The vlan id to be used as vlan tagging by this FCF.
 *
 * This routine compare the fcf record with connect list obtained from the
 * config region to decide if this FCF can be used for SAN discovery. It returns
 * 1 if this record can be used for SAN discovery else return zero. If this FCF
 * record can be used for SAN discovery, the boot_flag will indicate if this FCF
 * is used by boot bios and addr_mode will indicate the addressing mode to be
 * used for this FCF when the function returns.
 * If the FCF record need to be used with a particular vlan id, the vlan is
 * set in the vlan_id on return of the function. If not VLAN tagging need to
 * be used with the FCF vlan_id will be set to LPFC_FCOE_NULL_VID;
 **/
static int
lpfc_match_fcf_conn_list(struct lpfc_hba *phba,
                        struct fcf_record *new_fcf_record,
                        uint32_t *boot_flag, uint32_t *addr_mode,
                        uint16_t *vlan_id)
{
        struct lpfc_fcf_conn_entry *conn_entry;
        int i, j, fcf_vlan_id = 0;

        /* Find the lowest VLAN id in the FCF record */
        for (i = 0; i < 512; i++) {
                if (new_fcf_record->vlan_bitmap[i]) {
                        fcf_vlan_id = i * 8;
                        j = 0;
                        while (!((new_fcf_record->vlan_bitmap[i] >> j) & 1)) {
                                j++;
                                fcf_vlan_id++;
                        }
                        break;
                }
        }

        /* FCF not valid/available or solicitation in progress */
        if (!bf_get(lpfc_fcf_record_fcf_avail, new_fcf_record) ||
            !bf_get(lpfc_fcf_record_fcf_valid, new_fcf_record) ||
            bf_get(lpfc_fcf_record_fcf_sol, new_fcf_record))
                return 0;

        if (!(phba->hba_flag & HBA_FIP_SUPPORT)) {
                *boot_flag = 0;
                *addr_mode = bf_get(lpfc_fcf_record_mac_addr_prov,
                                new_fcf_record);
                if (phba->valid_vlan)
                        *vlan_id = phba->vlan_id;
                else
                        *vlan_id = LPFC_FCOE_NULL_VID;
                return 1;
        }

        /*
         * If there are no FCF connection table entry, driver connect to all
         * FCFs.
         */
        if (list_empty(&phba->fcf_conn_rec_list)) {
                *boot_flag = 0;
                *addr_mode = bf_get(lpfc_fcf_record_mac_addr_prov,
                        new_fcf_record);

                /*
                 * When there are no FCF connect entries, use driver's default
                 * addressing mode - FPMA.
                 */
                if (*addr_mode & LPFC_FCF_FPMA)
                        *addr_mode = LPFC_FCF_FPMA;

                /* If FCF record report a vlan id use that vlan id */
                if (fcf_vlan_id)
                        *vlan_id = fcf_vlan_id;
                else
                        *vlan_id = LPFC_FCOE_NULL_VID;
                return 1;
        }

        list_for_each_entry(conn_entry,
                            &phba->fcf_conn_rec_list, list) {
                if (!(conn_entry->conn_rec.flags & FCFCNCT_VALID))
                        continue;

                if ((conn_entry->conn_rec.flags & FCFCNCT_FBNM_VALID) &&
                        !lpfc_fab_name_match(conn_entry->conn_rec.fabric_name,
                                             new_fcf_record))
                        continue;
                if ((conn_entry->conn_rec.flags & FCFCNCT_SWNM_VALID) &&
                        !lpfc_sw_name_match(conn_entry->conn_rec.switch_name,
                                            new_fcf_record))
                        continue;
                if (conn_entry->conn_rec.flags & FCFCNCT_VLAN_VALID) {
                        /*
                         * If the vlan bit map does not have the bit set for the
                         * vlan id to be used, then it is not a match.
                         */
                        if (!(new_fcf_record->vlan_bitmap
                                [conn_entry->conn_rec.vlan_tag / 8] &
                                (1 << (conn_entry->conn_rec.vlan_tag % 8))))
                                continue;
                }

                /*
                 * If connection record does not support any addressing mode,
                 * skip the FCF record.
                 */
                if (!(bf_get(lpfc_fcf_record_mac_addr_prov, new_fcf_record)
                        & (LPFC_FCF_FPMA | LPFC_FCF_SPMA)))
                        continue;

                /*
                 * Check if the connection record specifies a required
                 * addressing mode.
                 */
                if ((conn_entry->conn_rec.flags & FCFCNCT_AM_VALID) &&
                        !(conn_entry->conn_rec.flags & FCFCNCT_AM_PREFERRED)) {

                        /*
                         * If SPMA required but FCF not support this continue.
                         */
                        if ((conn_entry->conn_rec.flags & FCFCNCT_AM_SPMA) &&
                                !(bf_get(lpfc_fcf_record_mac_addr_prov,
                                        new_fcf_record) & LPFC_FCF_SPMA))
                                continue;

                        /*
                         * If FPMA required but FCF not support this continue.
                         */
                        if (!(conn_entry->conn_rec.flags & FCFCNCT_AM_SPMA) &&
                                !(bf_get(lpfc_fcf_record_mac_addr_prov,
                                new_fcf_record) & LPFC_FCF_FPMA))
                                continue;
                }

                /*
                 * This fcf record matches filtering criteria.
                 */
                if (conn_entry->conn_rec.flags & FCFCNCT_BOOT)
                        *boot_flag = 1;
                else
                        *boot_flag = 0;

                /*
                 * If user did not specify any addressing mode, or if the
                 * preferred addressing mode specified by user is not supported
                 * by FCF, allow fabric to pick the addressing mode.
                 */
                *addr_mode = bf_get(lpfc_fcf_record_mac_addr_prov,
                                new_fcf_record);
                /*
                 * If the user specified a required address mode, assign that
                 * address mode
                 */
                if ((conn_entry->conn_rec.flags & FCFCNCT_AM_VALID) &&
                        (!(conn_entry->conn_rec.flags & FCFCNCT_AM_PREFERRED)))
                        *addr_mode = (conn_entry->conn_rec.flags &
                                FCFCNCT_AM_SPMA) ?
                                LPFC_FCF_SPMA : LPFC_FCF_FPMA;
                /*
                 * If the user specified a preferred address mode, use the
                 * addr mode only if FCF support the addr_mode.
                 */
                else if ((conn_entry->conn_rec.flags & FCFCNCT_AM_VALID) &&
                        (conn_entry->conn_rec.flags & FCFCNCT_AM_PREFERRED) &&
                        (conn_entry->conn_rec.flags & FCFCNCT_AM_SPMA) &&
                        (*addr_mode & LPFC_FCF_SPMA))
                                *addr_mode = LPFC_FCF_SPMA;
                else if ((conn_entry->conn_rec.flags & FCFCNCT_AM_VALID) &&
                        (conn_entry->conn_rec.flags & FCFCNCT_AM_PREFERRED) &&
                        !(conn_entry->conn_rec.flags & FCFCNCT_AM_SPMA) &&
                        (*addr_mode & LPFC_FCF_FPMA))
                                *addr_mode = LPFC_FCF_FPMA;

                /* If matching connect list has a vlan id, use it */
                if (conn_entry->conn_rec.flags & FCFCNCT_VLAN_VALID)
                        *vlan_id = conn_entry->conn_rec.vlan_tag;
                /*
                 * If no vlan id is specified in connect list, use the vlan id
                 * in the FCF record
                 */
                else if (fcf_vlan_id)
                        *vlan_id = fcf_vlan_id;
                else
                        *vlan_id = LPFC_FCOE_NULL_VID;

                return 1;
        }

        return 0;
}

/**
 * lpfc_check_pending_fcoe_event - Check if there is pending fcoe event.
 * @phba: pointer to lpfc hba data structure.
 * @unreg_fcf: Unregister FCF if FCF table need to be re-scaned.
 *
 * This function check if there is any fcoe event pending while driver
 * scan FCF entries. If there is any pending event, it will restart the
 * FCF saning and return 1 else return 0.
 */
int
lpfc_check_pending_fcoe_event(struct lpfc_hba *phba, uint8_t unreg_fcf)
{
        /*
         * If the Link is up and no FCoE events while in the
         * FCF discovery, no need to restart FCF discovery.
         */
        if ((phba->link_state  >= LPFC_LINK_UP) &&
            (phba->fcoe_eventtag == phba->fcoe_eventtag_at_fcf_scan))
                return 0;

        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                        "2768 Pending link or FCF event during current "
                        "handling of the previous event: link_state:x%x, "
                        "evt_tag_at_scan:x%x, evt_tag_current:x%x\n",
                        phba->link_state, phba->fcoe_eventtag_at_fcf_scan,
                        phba->fcoe_eventtag);

        spin_lock_irq(&phba->hbalock);
        phba->fcf.fcf_flag &= ~FCF_AVAILABLE;
        spin_unlock_irq(&phba->hbalock);

        if (phba->link_state >= LPFC_LINK_UP) {
                lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
                                "2780 Restart FCF table scan due to "
                                "pending FCF event:evt_tag_at_scan:x%x, "
                                "evt_tag_current:x%x\n",
                                phba->fcoe_eventtag_at_fcf_scan,
                                phba->fcoe_eventtag);
                lpfc_sli4_fcf_scan_read_fcf_rec(phba, LPFC_FCOE_FCF_GET_FIRST);
        } else {
                /*
                 * Do not continue FCF discovery and clear FCF_TS_INPROG
                 * flag
                 */
                lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
                                "2833 Stop FCF discovery process due to link "
                                "state change (x%x)\n", phba->link_state);
                spin_lock_irq(&phba->hbalock);
                phba->hba_flag &= ~(FCF_TS_INPROG | FCF_RR_INPROG);
                phba->fcf.fcf_flag &= ~(FCF_REDISC_FOV | FCF_DISCOVERY);
                spin_unlock_irq(&phba->hbalock);
        }

        /* Unregister the currently registered FCF if required */
        if (unreg_fcf) {
                spin_lock_irq(&phba->hbalock);
                phba->fcf.fcf_flag &= ~FCF_REGISTERED;
                spin_unlock_irq(&phba->hbalock);
                lpfc_sli4_unregister_fcf(phba);
        }
        return 1;
}

/**
 * lpfc_sli4_new_fcf_random_select - Randomly select an eligible new fcf record
 * @phba: pointer to lpfc hba data structure.
 * @fcf_cnt: number of eligible fcf record seen so far.
 *
 * This function makes an running random selection decision on FCF record to
 * use through a sequence of @fcf_cnt eligible FCF records with equal
 * probability. To perform integer manunipulation of random numbers with
 * size unit32_t, the lower 16 bits of the 32-bit random number returned
 * from prandom_u32() are taken as the random random number generated.
 *
 * Returns true when outcome is for the newly read FCF record should be
 * chosen; otherwise, return false when outcome is for keeping the previously
 * chosen FCF record.
 **/
static bool
lpfc_sli4_new_fcf_random_select(struct lpfc_hba *phba, uint32_t fcf_cnt)
{
        uint32_t rand_num;

        /* Get 16-bit uniform random number */
        rand_num = 0xFFFF & prandom_u32();

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

/**
 * lpfc_sli4_fcf_rec_mbox_parse - Parse read_fcf mbox command.
 * @phba: pointer to lpfc hba data structure.
 * @mboxq: pointer to mailbox object.
 * @next_fcf_index: pointer to holder of next fcf index.
 *
 * This routine parses the non-embedded fcf mailbox command by performing the
 * necessarily error checking, non-embedded read FCF record mailbox command
 * SGE parsing, and endianness swapping.
 *
 * Returns the pointer to the new FCF record in the non-embedded mailbox
 * command DMA memory if successfully, other NULL.
 */
static struct fcf_record *
lpfc_sli4_fcf_rec_mbox_parse(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq,
                             uint16_t *next_fcf_index)
{
        void *virt_addr;
        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;
        lpfc_sli_pcimem_bcopy(shdr, shdr,
                              sizeof(union lpfc_sli4_cfg_shdr));
        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;
}

/**
 * lpfc_sli4_log_fcf_record_info - Log the information of a fcf record
 * @phba: pointer to lpfc hba data structure.
 * @fcf_record: pointer to the fcf record.
 * @vlan_id: the lowest vlan identifier associated to this fcf record.
 * @next_fcf_index: the index to the next fcf record in hba's fcf table.
 *
 * This routine logs the detailed FCF record if the LOG_FIP loggin is
 * enabled.
 **/
static void
lpfc_sli4_log_fcf_record_info(struct lpfc_hba *phba,
                              struct fcf_record *fcf_record,
                              uint16_t vlan_id,
                              uint16_t next_fcf_index)
{
        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                        "2764 READ_FCF_RECORD:\n"
                        "\tFCF_Index     : x%x\n"
                        "\tFCF_Avail     : x%x\n"
                        "\tFCF_Valid     : x%x\n"
                        "\tFCF_SOL       : x%x\n"
                        "\tFIP_Priority  : x%x\n"
                        "\tMAC_Provider  : x%x\n"
                        "\tLowest VLANID : x%x\n"
                        "\tFCF_MAC Addr  : x%x:%x:%x:%x:%x:%x\n"
                        "\tFabric_Name   : x%x:%x:%x:%x:%x:%x:%x:%x\n"
                        "\tSwitch_Name   : x%x:%x:%x:%x:%x:%x:%x:%x\n"
                        "\tNext_FCF_Index: x%x\n",
                        bf_get(lpfc_fcf_record_fcf_index, fcf_record),
                        bf_get(lpfc_fcf_record_fcf_avail, fcf_record),
                        bf_get(lpfc_fcf_record_fcf_valid, fcf_record),
                        bf_get(lpfc_fcf_record_fcf_sol, fcf_record),
                        fcf_record->fip_priority,
                        bf_get(lpfc_fcf_record_mac_addr_prov, fcf_record),
                        vlan_id,
                        bf_get(lpfc_fcf_record_mac_0, fcf_record),
                        bf_get(lpfc_fcf_record_mac_1, fcf_record),
                        bf_get(lpfc_fcf_record_mac_2, fcf_record),
                        bf_get(lpfc_fcf_record_mac_3, fcf_record),
                        bf_get(lpfc_fcf_record_mac_4, fcf_record),
                        bf_get(lpfc_fcf_record_mac_5, fcf_record),
                        bf_get(lpfc_fcf_record_fab_name_0, fcf_record),
                        bf_get(lpfc_fcf_record_fab_name_1, fcf_record),
                        bf_get(lpfc_fcf_record_fab_name_2, fcf_record),
                        bf_get(lpfc_fcf_record_fab_name_3, fcf_record),
                        bf_get(lpfc_fcf_record_fab_name_4, fcf_record),
                        bf_get(lpfc_fcf_record_fab_name_5, fcf_record),
                        bf_get(lpfc_fcf_record_fab_name_6, fcf_record),
                        bf_get(lpfc_fcf_record_fab_name_7, fcf_record),
                        bf_get(lpfc_fcf_record_switch_name_0, fcf_record),
                        bf_get(lpfc_fcf_record_switch_name_1, fcf_record),
                        bf_get(lpfc_fcf_record_switch_name_2, fcf_record),
                        bf_get(lpfc_fcf_record_switch_name_3, fcf_record),
                        bf_get(lpfc_fcf_record_switch_name_4, fcf_record),
                        bf_get(lpfc_fcf_record_switch_name_5, fcf_record),
                        bf_get(lpfc_fcf_record_switch_name_6, fcf_record),
                        bf_get(lpfc_fcf_record_switch_name_7, fcf_record),
                        next_fcf_index);
}

/**
 lpfc_sli4_fcf_record_match - testing new FCF record for matching existing FCF
 * @phba: pointer to lpfc hba data structure.
 * @fcf_rec: pointer to an existing FCF record.
 * @new_fcf_record: pointer to a new FCF record.
 * @new_vlan_id: vlan id from the new FCF record.
 *
 * This function performs matching test of a new FCF record against an existing
 * FCF record. If the new_vlan_id passed in is LPFC_FCOE_IGNORE_VID, vlan id
 * will not be used as part of the FCF record matching criteria.
 *
 * Returns true if all the fields matching, otherwise returns false.
 */
static bool
lpfc_sli4_fcf_record_match(struct lpfc_hba *phba,
                           struct lpfc_fcf_rec *fcf_rec,
                           struct fcf_record *new_fcf_record,
                           uint16_t new_vlan_id)
{
        if (new_vlan_id != LPFC_FCOE_IGNORE_VID)
                if (!lpfc_vlan_id_match(fcf_rec->vlan_id, new_vlan_id))
                        return false;
        if (!lpfc_mac_addr_match(fcf_rec->mac_addr, new_fcf_record))
                return false;
        if (!lpfc_sw_name_match(fcf_rec->switch_name, new_fcf_record))
                return false;
        if (!lpfc_fab_name_match(fcf_rec->fabric_name, new_fcf_record))
                return false;
        if (fcf_rec->priority != new_fcf_record->fip_priority)
                return false;
        return true;
}

/**
 * lpfc_sli4_fcf_rr_next_proc - processing next roundrobin fcf
 * @vport: Pointer to vport object.
 * @fcf_index: index to next fcf.
 *
 * This function processing the roundrobin fcf failover to next fcf index.
 * When this function is invoked, there will be a current fcf registered
 * for flogi.
 * Return: 0 for continue retrying flogi on currently registered fcf;
 *         1 for stop flogi on currently registered fcf;
 */
int lpfc_sli4_fcf_rr_next_proc(struct lpfc_vport *vport, uint16_t fcf_index)
{
        struct lpfc_hba *phba = vport->phba;
        int rc;

        if (fcf_index == LPFC_FCOE_FCF_NEXT_NONE) {
                spin_lock_irq(&phba->hbalock);
                if (phba->hba_flag & HBA_DEVLOSS_TMO) {
                        spin_unlock_irq(&phba->hbalock);
                        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                                        "2872 Devloss tmo with no eligible "
                                        "FCF, unregister in-use FCF (x%x) "
                                        "and rescan FCF table\n",
                                        phba->fcf.current_rec.fcf_indx);
                        lpfc_unregister_fcf_rescan(phba);
                        goto stop_flogi_current_fcf;
                }
                /* Mark the end to FLOGI roundrobin failover */
                phba->hba_flag &= ~FCF_RR_INPROG;
                /* Allow action to new fcf asynchronous event */
                phba->fcf.fcf_flag &= ~(FCF_AVAILABLE | FCF_SCAN_DONE);
                spin_unlock_irq(&phba->hbalock);
                lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                                "2865 No FCF available, stop roundrobin FCF "
                                "failover and change port state:x%x/x%x\n",
                                phba->pport->port_state, LPFC_VPORT_UNKNOWN);
                phba->pport->port_state = LPFC_VPORT_UNKNOWN;
                goto stop_flogi_current_fcf;
        } else {
                lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_ELS,
                                "2794 Try FLOGI roundrobin FCF failover to "
                                "(x%x)\n", fcf_index);
                rc = lpfc_sli4_fcf_rr_read_fcf_rec(phba, fcf_index);
                if (rc)
                        lpfc_printf_log(phba, KERN_WARNING, LOG_FIP | LOG_ELS,
                                        "2761 FLOGI roundrobin FCF failover "
                                        "failed (rc:x%x) to read FCF (x%x)\n",
                                        rc, phba->fcf.current_rec.fcf_indx);
                else
                        goto stop_flogi_current_fcf;
        }
        return 0;

stop_flogi_current_fcf:
        lpfc_can_disctmo(vport);
        return 1;
}

/**
 * lpfc_sli4_fcf_pri_list_del
 * @phba: pointer to lpfc hba data structure.
 * @fcf_index the index of the fcf record to delete
 * This routine checks the on list flag of the fcf_index to be deleted.
 * If it is one the list then it is removed from the list, and the flag
 * is cleared. This routine grab the hbalock before removing the fcf
 * record from the list.
 **/
static void lpfc_sli4_fcf_pri_list_del(struct lpfc_hba *phba,
                        uint16_t fcf_index)
{
        struct lpfc_fcf_pri *new_fcf_pri;

        new_fcf_pri = &phba->fcf.fcf_pri[fcf_index];
        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                "3058 deleting idx x%x pri x%x flg x%x\n",
                fcf_index, new_fcf_pri->fcf_rec.priority,
                 new_fcf_pri->fcf_rec.flag);
        spin_lock_irq(&phba->hbalock);
        if (new_fcf_pri->fcf_rec.flag & LPFC_FCF_ON_PRI_LIST) {
                if (phba->fcf.current_rec.priority ==
                                new_fcf_pri->fcf_rec.priority)
                        phba->fcf.eligible_fcf_cnt--;
                list_del_init(&new_fcf_pri->list);
                new_fcf_pri->fcf_rec.flag &= ~LPFC_FCF_ON_PRI_LIST;
        }
        spin_unlock_irq(&phba->hbalock);
}

/**
 * lpfc_sli4_set_fcf_flogi_fail
 * @phba: pointer to lpfc hba data structure.
 * @fcf_index the index of the fcf record to update
 * This routine acquires the hbalock and then set the LPFC_FCF_FLOGI_FAILED
 * flag so the the round robin slection for the particular priority level
 * will try a different fcf record that does not have this bit set.
 * If the fcf record is re-read for any reason this flag is cleared brfore
 * adding it to the priority list.
 **/
void
lpfc_sli4_set_fcf_flogi_fail(struct lpfc_hba *phba, uint16_t fcf_index)
{
        struct lpfc_fcf_pri *new_fcf_pri;
        new_fcf_pri = &phba->fcf.fcf_pri[fcf_index];
        spin_lock_irq(&phba->hbalock);
        new_fcf_pri->fcf_rec.flag |= LPFC_FCF_FLOGI_FAILED;
        spin_unlock_irq(&phba->hbalock);
}

/**
 * lpfc_sli4_fcf_pri_list_add
 * @phba: pointer to lpfc hba data structure.
 * @fcf_index the index of the fcf record to add
 * This routine checks the priority of the fcf_index to be added.
 * If it is a lower priority than the current head of the fcf_pri list
 * then it is added to the list in the right order.
 * If it is the same priority as the current head of the list then it
 * is added to the head of the list and its bit in the rr_bmask is set.
 * If the fcf_index to be added is of a higher priority than the current
 * head of the list then the rr_bmask is cleared, its bit is set in the
 * rr_bmask and it is added to the head of the list.
 * returns:
 * 0=success 1=failure
 **/
int lpfc_sli4_fcf_pri_list_add(struct lpfc_hba *phba, uint16_t fcf_index,
        struct fcf_record *new_fcf_record)
{
        uint16_t current_fcf_pri;
        uint16_t last_index;
        struct lpfc_fcf_pri *fcf_pri;
        struct lpfc_fcf_pri *next_fcf_pri;
        struct lpfc_fcf_pri *new_fcf_pri;
        int ret;

        new_fcf_pri = &phba->fcf.fcf_pri[fcf_index];
        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
                "3059 adding idx x%x pri x%x flg x%x\n",
                fcf_index, new_fcf_record->fip_priority,
                 new_fcf_pri->fcf_rec.flag);
        spin_lock_irq(&phba->hbalock);
        if (new_fcf_pri->fcf_rec.flag & LPFC_FCF_ON_PRI_LIST)
                list_del_init(&new_fcf_pri->list);
        new_fcf_pri->fcf_rec.fcf_index = fcf_index;
        new_fcf_pri->fcf_rec.priority = new_fcf_record->fip_priority;
        if (list_empty(&phba->fcf.fcf_pri_list)) {
                list_add(&new_fcf_pri->list, &phba->fcf.fcf_pri_list);
                ret = lpfc_sli4_fcf_rr_index_set(phba,
                                new_fcf_pri->fcf_rec.fcf_index);
                goto out;
        }

        last_index = find_first_bit(phba->fcf.fcf_rr_bmask,
                                LPFC_SLI4_FCF_TBL_INDX_MAX);
        if (last_index >= LPFC_SLI4_FCF_TBL_INDX_MAX) {
                ret = 0; /* Empty rr list */
                goto out;
        }
        current_fcf_pri = phba->fcf.fcf_pri[last_index].fcf_rec.priority;
        if (new_fcf_pri->fcf_rec.priority <=  current_fcf_pri) {
                list_add(&new_fcf_pri->list, &phba->fcf.fcf_pri_list);
                if (new_fcf_pri->fcf_rec.priority <  current_fcf_pri) {
                        memset(phba->fcf.fcf_rr_bmask, 0,
                                sizeof(*phba->fcf.fcf_rr_bmask));
                        /* fcfs_at_this_priority_level = 1; */
                        phba->fcf.eligible_fcf_cnt = 1;
                } else
                        /* fcfs_at_this_priority_level++; */
                        phba->fcf.eligible_fcf_cnt++;
                ret = lpfc_sli4_fcf_rr_index_set(phba,
                                new_fcf_pri->fcf_rec.fcf_index);
                goto out;
        }

        list_for_each_entry_safe(fcf_pri, next_fcf_pri,
                                &phba->fcf.fcf_pri_list, list) {
                if (new_fcf_pri->fcf_rec.priority <=
                                fcf_pri->fcf_rec.priority) {
                        if (fcf_pri->list.prev == &phba->fcf.fcf_pri_list)
                                list_add(&new_fcf_pri->list,
                                                &phba->fcf.fcf_pri_list);
                        else
                                list_add(&new_fcf_pri->list,
                                         &((struct lpfc_fcf_pri *)
                                        fcf_pri->list.prev)->list);
                        ret = 0;
                        goto out;
                } else if (fcf_pri->list.next == &phba->fcf.fcf_pri_list
                        || new_fcf_pri->fcf_rec.priority <
                                next_fcf_pri->fcf_rec.priority) {
                        list_add(&new_fcf_pri->list, &fcf_pri->list);
                        ret = 0;
                        goto out;
                }
                if (new_fcf_pri->fcf_rec.priority > fcf_pri->fcf_rec.priority)
                        continue;

        }
        ret = 1;
out:
        /* we use = instead of |= to clear the FLOGI_FAILED flag. */
        new_fcf_pri->fcf_rec.flag = LPFC_FCF_ON_PRI_LIST;
        spin_unlock_irq(&phba->hbalock);
        return ret;
}

/**
 * lpfc_mbx_cmpl_fcf_scan_read_fcf_rec - fcf scan read_fcf mbox cmpl handler.
 * @phba: pointer to lpfc hba data structure.
 * @mboxq: pointer to mailbox object.
 *
 * This function iterates through all the fcf records available in
 * HBA and chooses the optimal FCF record for discovery. After finding
 * the FCF for discovery it registers the FCF record and kicks start
 * discovery.
 * If FCF_IN_USE flag is set in currently used FCF, the routine tries to
 * use an FCF record which matches fabric name and mac address of the
 * currently used FCF record.
 * If the driver supports only one FCF, it will try to use the FCF record
 * used by BOOT_BIOS.
 */
void
lpfc_mbx_cmpl_fcf_scan_read_fcf_rec(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
        struct fcf_record *new_fcf_record;
        uint32_t boot_flag, addr_mode;
        uint16_t fcf_index, next_fcf_index;
        struct lpfc_fcf_rec *fcf_rec = NULL;
        uint16_t vlan_id;
        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), port_state:x%x, "
                                                "fc_flag:x%x\n",
                                                phba->fcf.current_rec.fcf_indx,
                                                phba->pport->port_state,
                                                phba->pport->fc_flag);
                                goto out;
                        } else
                                lpfc_printf_log(phba, KERN_ERR, LOG_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);
                prandom_seed(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;
}

/**
 * lpfc_mbx_cmpl_fcf_rr_read_fcf_rec - fcf roundrobin read_fcf mbox cmpl hdler
 * @phba: pointer to lpfc hba data structure.
 * @mboxq: pointer to mailbox object.
 *
 * This is the callback function for FLOGI failure roundrobin FCF failover
 * read FCF record mailbox command from the eligible FCF record bmask for
 * performing the failover. If the FCF read back is not valid/available, it
 * fails through to retrying FLOGI to the currently registered FCF again.
 * Otherwise, if the FCF read back is valid and available, it will set the
 * newly read FCF record to the failover FCF record, unregister currently
 * registered FCF record, copy the failover FCF record to the current
 * FCF record, and then register the current FCF record before proceeding
 * to trying FLOGI on the new failover FCF.
 */
void
lpfc_mbx_cmpl_fcf_rr_read_fcf_rec(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
        struct fcf_record *new_fcf_record;
        uint32_t boot_flag, addr_mode;
        uint16_t next_fcf_index, fcf_index;
        uint16_t current_fcf_index;
        uint16_t vlan_id;
        int rc;

        /* If link state is not up, stop the roundrobin failover process */
        if (phba->link_state < LPFC_LINK_UP) {
                spin_lock_irq(&phba->hbalock);
                phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
                phba->hba_flag &= ~FCF_RR_INPROG;
                spin_unlock_irq(&phba->hbalock);
                goto out;
        }

        /* Parse the FCF record from the non-embedded mailbox command */
        new_fcf_record = lpfc_sli4_fcf_rec_mbox_parse(phba, mboxq,
                                                      &next_fcf_index);
        if (!new_fcf_record) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_FIP,
                                "2766 Mailbox command READ_FCF_RECORD "
                                "failed to retrieve a FCF record.\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);
}

/**
 * lpfc_mbx_cmpl_read_fcf_rec - read fcf completion handler.
 * @phba: pointer to lpfc hba data structure.
 * @mboxq: pointer to mailbox object.
 *
 * This is the callback function of read FCF record mailbox command for
 * updating the eligible FCF bmask for FLOGI failure roundrobin FCF
 * failover when a new FCF event happened. If the FCF read back is
 * valid/available and it passes the connection list check, it updates
 * the bmask for the eligible FCF record for roundrobin failover.
 */
void
lpfc_mbx_cmpl_read_fcf_rec(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
        struct fcf_record *new_fcf_record;
        uint32_t boot_flag, addr_mode;
        uint16_t fcf_index, next_fcf_index;
        uint16_t vlan_id;
        int rc;

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

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

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

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

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

        if (!rc)
                goto out;

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

        rc = lpfc_sli4_fcf_pri_list_add(phba, fcf_index, new_fcf_record);

out:
        lpfc_sli4_mbox_cmd_free(phba, mboxq);
}

/**
 * lpfc_init_vfi_cmpl - Completion handler for init_vfi mbox command.
 * @phba: pointer to lpfc hba data structure.
 * @mboxq: pointer to mailbox data structure.
 *
 * This function handles completion of init vfi mailbox command.
 */
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;
}

/**
 * lpfc_issue_init_vfi - Issue init_vfi mailbox command.
 * @vport: pointer to lpfc_vport data structure.
 *
 * This function issue a init_vfi mailbox command to initialize the VFI and
 * VPI for the physical port.
 */
void
lpfc_issue_init_vfi(struct lpfc_vport *vport)
{
        LPFC_MBOXQ_t *mboxq;
        int rc;
        struct lpfc_hba *phba = vport->phba;

        mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mboxq) {
                lpfc_printf_vlog(vport, KERN_ERR,
                        LOG_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);
        }
}

/**
 * lpfc_init_vpi_cmpl - Completion handler for init_vpi mbox command.
 * @phba: pointer to lpfc hba data structure.
 * @mboxq: pointer to mailbox data structure.
 *
 * This function handles completion of init vpi mailbox command.
 */
void
lpfc_init_vpi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
        struct lpfc_vport *vport = mboxq->vport;
        struct lpfc_nodelist *ndlp;
        struct Scsi_Host *shost = lpfc_shost_from_vport(vport);

        if (mboxq->u.mb.mbxStatus) {
                lpfc_printf_vlog(vport, KERN_ERR,
                                LOG_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;
}

/**
 * lpfc_issue_init_vpi - Issue init_vpi mailbox command.
 * @vport: pointer to lpfc_vport data structure.
 *
 * This function issue a init_vpi mailbox command to initialize
 * VPI for the vport.
 */
void
lpfc_issue_init_vpi(struct lpfc_vport *vport)
{
        LPFC_MBOXQ_t *mboxq;
        int rc, vpi;

        if ((vport->port_type != LPFC_PHYSICAL_PORT) && (!vport->vpi)) {
                vpi = lpfc_alloc_vpi(vport->phba);
                if (!vpi) {
                        lpfc_printf_vlog(vport, KERN_ERR,
                                         LOG_MBOX,
                                         "3303 Failed to obtain vport vpi\n");
                        lpfc_vport_set_state(vport, FC_VPORT_FAILED);
                        return;
                }
                vport->vpi = vpi;
        }

        mboxq = mempool_alloc(vport->phba->mbox_mem_pool, GFP_KERNEL);
        if (!mboxq) {
                lpfc_printf_vlog(vport, KERN_ERR,
                        LOG_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);
        }
}

/**
 * lpfc_start_fdiscs - send fdiscs for each vports on this port.
 * @phba: pointer to lpfc hba data structure.
 *
 * This function loops through the list of vports on the @phba and issues an
 * FDISC if possible.
 */
void
lpfc_start_fdiscs(struct lpfc_hba *phba)
{
        struct lpfc_vport **vports;
        int i;

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

        /* If the VFI is already registered, there is nothing else to do
         * Unless this was a VFI update and we are in PT2PT mode, then
         * we should drop through to set the port state to ready.
         */
        if (vport->fc_flag & FC_VFI_REGISTERED)
                if (!(phba->sli_rev == LPFC_SLI_REV4 &&
                      vport->fc_flag & FC_PT2PT))
                        goto out_free_mem;

        /* The VPI is implicitly registered when the VFI is registered */
        spin_lock_irq(shost->host_lock);
        vport->vpi_state |= LPFC_VPI_REGISTERED;
        vport->fc_flag |= FC_VFI_REGISTERED;
        vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
        vport->fc_flag &= ~FC_VPORT_NEEDS_INIT_VPI;
        spin_unlock_irq(shost->host_lock);

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

        lpfc_printf_vlog(vport, KERN_INFO, LOG_SLI,
                         "3313 cmpl reg vfi  port_state:%x fc_flag:%x myDid:%x "
                         "alpacnt:%d LinkState:%x topology:%x\n",
                         vport->port_state, vport->fc_flag, vport->fc_myDID,
                         vport->phba->alpa_map[0],
                         phba->link_state, phba->fc_topology);

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

                        /* Use loop map to make discovery list */
                        lpfc_disc_list_loopmap(vport);
                        /* Start discovery */
                        if (vport->fc_flag & FC_PT2PT)
                                vport->port_state = LPFC_VPORT_READY;
                        else
                                lpfc_disc_start(vport);
                } else {
                        lpfc_start_fdiscs(phba);
                        lpfc_do_scr_ns_plogi(phba, vport);
                }
        }

out_free_mem:
        mempool_free(mboxq, phba->mbox_mem_pool);
        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;
        uint32_t fc_flags = 0;

        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;
        }

        if (phba->fc_topology &&
            phba->fc_topology != bf_get(lpfc_mbx_read_top_topology, la)) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                "3314 Toplogy changed was 0x%x is 0x%x\n",
                                phba->fc_topology,
                                bf_get(lpfc_mbx_read_top_topology, la));
                phba->fc_topology_changed = 1;
        }

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

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

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

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

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

        if (fc_flags) {
                spin_lock_irq(shost->host_lock);
                vport->fc_flag |= fc_flags;
                spin_unlock_irq(shost->host_lock);
        }

        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_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;
        if (phba->sli_rev < LPFC_SLI_REV4) {
                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) &&
            !(phba->sli.sli_flag & LPFC_MENLO_MAINT)) {
                phba->fc_stat.LinkUp++;
                if (phba->link_flag & LS_LOOPBACK_MODE) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
                                        "1306 Link Up Event in loop back mode "
                                        "x%x received Data: x%x x%x x%x x%x\n",
                                        la->eventTag, phba->fc_eventTag,
                                        bf_get(lpfc_mbx_read_top_alpa_granted,
                                               la),
                                        bf_get(lpfc_mbx_read_top_link_spd, la),
                                        phba->alpa_map[0]);
                } else {
                        lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
                                        "1303 Link Up Event x%x received "
                                        "Data: x%x x%x x%x x%x x%x x%x %d\n",
                                        la->eventTag, phba->fc_eventTag,
                                        bf_get(lpfc_mbx_read_top_alpa_granted,
                                               la),
                                        bf_get(lpfc_mbx_read_top_link_spd, la),
                                        phba->alpa_map[0],
                                        bf_get(lpfc_mbx_read_top_mm, la),
                                        bf_get(lpfc_mbx_read_top_fa, la),
                                        phba->wait_4_mlo_maint_flg);
                }
                lpfc_mbx_process_link_up(phba, la);
        } else if (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 ((phba->sli.sli_flag & LPFC_MENLO_MAINT) &&
            ((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 ((phba->sli_rev < LPFC_SLI_REV4) &&
            bf_get(lpfc_mbx_read_top_fa, la)) {
                if (phba->sli.sli_flag & LPFC_MENLO_MAINT)
                        lpfc_issue_clear_la(phba, vport);
                lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
                                "1311 fa %d\n",
                                bf_get(lpfc_mbx_read_top_fa, la));
        }

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

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

/**
 * lpfc_create_static_vport - Read HBA config region to create static vports.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine issue a DUMP mailbox command for config region 22 to get
 * the list of static vports to be created. The function create vports
 * based on the information returned from the HBA.
 **/
void
lpfc_create_static_vport(struct lpfc_hba *phba)
{
        LPFC_MBOXQ_t *pmb = NULL;
        MAILBOX_t *mb;
        struct static_vport_info *vport_info;
        int mbx_wait_rc = 0, i;
        struct fc_vport_identifiers vport_id;
        struct fc_vport *new_fc_vport;
        struct Scsi_Host *shost;
        struct lpfc_vport *vport;
        uint16_t offset = 0;
        uint8_t *vport_buff;
        struct lpfc_dmabuf *mp;
        uint32_t byte_count = 0;

        pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!pmb) {
                lpfc_printf_log(phba, KERN_ERR, LOG_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);
}
/**
 * lpfc_initialize_node - Initialize all fields of node object
 * @vport: Pointer to Virtual Port object.
 * @ndlp: Pointer to FC node object.
 * @did: FC_ID of the node.
 *
 * This function is always called when node object need to be initialized.
 * It initializes all the fields of the node object. Although the reference
 * to phba from @ndlp can be obtained indirectly through it's reference to
 * @vport, a direct reference to phba is taken here by @ndlp. This is due
 * to the life-span of the @ndlp might go beyond the existence of @vport as
 * the final release of ndlp is determined by its reference count. And, the
 * operation on @ndlp needs the reference to phba.
 **/
static inline void
lpfc_initialize_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
        uint32_t did)
{
        INIT_LIST_HEAD(&ndlp->els_retry_evt.evt_listp);
        INIT_LIST_HEAD(&ndlp->dev_loss_evt.evt_listp);
        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 + msecs_to_jiffies(1000 * tmo));
        spin_lock_irq(shost->host_lock);
        vport->fc_flag |= FC_DISC_TMO;
        spin_unlock_irq(shost->host_lock);

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

        return;
}

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

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

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

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

/*
 * Check specified ring for outstanding IOCB on the SLI queue
 * Return true if iocb matches the specified nport
 */
int
lpfc_check_sli_ndlp(struct lpfc_hba *phba,
                    struct lpfc_sli_ring *pring,
                    struct lpfc_iocbq *iocb,
                    struct lpfc_nodelist *ndlp)
{
        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);
                                }
                        }
                        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;
}

/**
 * lpfc_nlp_logo_unreg - Unreg mailbox completion handler before LOGO
 * @phba: Pointer to HBA context object.
 * @pmb: Pointer to mailbox object.
 *
 * This function will issue an ELS LOGO command after completing
 * the UNREG_RPI.
 **/
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;
}

/**
 * lpfc_unreg_hba_rpis - Unregister rpis registered to the hba.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to unregister all the currently registered RPIs
 * to the HBA.
 **/
void
lpfc_unreg_hba_rpis(struct lpfc_hba *phba)
{
        struct lpfc_vport **vports;
        struct lpfc_nodelist *ndlp;
        struct Scsi_Host *shost;
        int i;

        vports = lpfc_create_vport_work_array(phba);
        if (!vports) {
                lpfc_printf_log(phba, KERN_ERR, LOG_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)) {
                lpfc_printf_vlog(vport, KERN_INFO, LOG_SLI,
                                 "3315 Link is not up %x\n",
                                 phba->link_state);
                return;
        }

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

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

        lpfc_set_disctmo(vport);

        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);
                }
        }

        /* 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 + msecs_to_jiffies(1000 * 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;
}

/**
 * lpfc_find_vport_by_vpid - Find a vport on a HBA through vport identifier
 * @phba: pointer to lpfc hba data structure.
 * @vpi: the physical host virtual N_Port identifier.
 *
 * This routine finds a vport on a HBA (referred by @phba) through a
 * @vpi. The function walks the HBA's vport list and returns the address
 * of the vport with the matching @vpi.
 *
 * Return code
 *    NULL - No vport with the matching @vpi found
 *    Otherwise - Address to the vport with the matching @vpi.
 **/
struct lpfc_vport *
lpfc_find_vport_by_vpid(struct lpfc_hba *phba, uint16_t vpi)
{
        struct lpfc_vport *vport;
        unsigned long flags;
        int i = 0;

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

                if (i >= phba->max_vpi) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_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;
}

/**
 * lpfc_fcf_inuse - Check if FCF can be unregistered.
 * @phba: Pointer to hba context object.
 *
 * This function iterate through all FC nodes associated
 * will all vports to check if there is any node with
 * fc_rports associated with it. If there is an fc_rport
 * associated with the node, then the node is either in
 * discovered state or its devloss_timer is pending.
 */
static int
lpfc_fcf_inuse(struct lpfc_hba *phba)
{
        struct lpfc_vport **vports;
        int i, ret = 0;
        struct lpfc_nodelist *ndlp;
        struct Scsi_Host  *shost;

        vports = lpfc_create_vport_work_array(phba);

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

        for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
                shost = lpfc_shost_from_vport(vports[i]);
                spin_lock_irq(shost->host_lock);
                /*
                 * IF the CVL_RCVD bit is not set then we have sent the
                 * flogi.
                 * If dev_loss fires while we are waiting we do not want to
                 * unreg the fcf.
                 */
                if (!(vports[i]->fc_flag & FC_VPORT_CVL_RCVD)) {
                        spin_unlock_irq(shost->host_lock);
                        ret =  1;
                        goto out;
                }
                list_for_each_entry(ndlp, &vports[i]->fc_nodes, nlp_listp) {
                        if (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;
}

/**
 * lpfc_unregister_vfi_cmpl - Completion handler for unreg vfi.
 * @phba: Pointer to hba context object.
 * @mboxq: Pointer to mailbox object.
 *
 * This function frees memory associated with the mailbox command.
 */
void
lpfc_unregister_vfi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
        struct lpfc_vport *vport = mboxq->vport;
        struct Scsi_Host *shost = lpfc_shost_from_vport(vport);

        if (mboxq->u.mb.mbxStatus) {
                lpfc_printf_log(phba, KERN_ERR, LOG_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;
}

/**
 * lpfc_unregister_fcfi_cmpl - Completion handler for unreg fcfi.
 * @phba: Pointer to hba context object.
 * @mboxq: Pointer to mailbox object.
 *
 * This function frees memory associated with the mailbox command.
 */
static void
lpfc_unregister_fcfi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
        struct lpfc_vport *vport = mboxq->vport;

        if (mboxq->u.mb.mbxStatus) {
                lpfc_printf_log(phba, KERN_ERR, LOG_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;
}

/**
 * lpfc_unregister_fcf_prep - Unregister fcf record preparation
 * @phba: Pointer to hba context object.
 *
 * This function prepare the HBA for unregistering the currently registered
 * FCF from the HBA. It performs unregistering, in order, RPIs, VPIs, and
 * VFIs.
 */
int
lpfc_unregister_fcf_prep(struct lpfc_hba *phba)
{
        struct lpfc_vport **vports;
        struct lpfc_nodelist *ndlp;
        struct Scsi_Host *shost;
        int i = 0, rc;

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

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

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

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

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

/**
 * lpfc_sli4_unregister_fcf - Unregister currently registered FCF record
 * @phba: Pointer to hba context object.
 *
 * This function issues synchronous unregister FCF mailbox command to HBA to
 * unregister the currently registered FCF record. The driver does not reset
 * the driver FCF usage state flags.
 *
 * Return 0 if successfully issued, none-zero otherwise.
 */
int
lpfc_sli4_unregister_fcf(struct lpfc_hba *phba)
{
        LPFC_MBOXQ_t *mbox;
        int rc;

        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox) {
                lpfc_printf_log(phba, KERN_ERR, LOG_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;
}

/**
 * lpfc_unregister_fcf_rescan - Unregister currently registered fcf and rescan
 * @phba: Pointer to hba context object.
 *
 * This function unregisters the currently reigstered FCF. This function
 * also tries to find another FCF for discovery by rescan the HBA FCF table.
 */
void
lpfc_unregister_fcf_rescan(struct lpfc_hba *phba)
{
        int rc;

        /* Preparation for unregistering fcf */
        rc = lpfc_unregister_fcf_prep(phba);
        if (rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_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);
        }
}

/**
 * lpfc_unregister_fcf - Unregister the currently registered fcf record
 * @phba: Pointer to hba context object.
 *
 * This function just unregisters the currently reigstered FCF. It does not
 * try to find another FCF for discovery.
 */
void
lpfc_unregister_fcf(struct lpfc_hba *phba)
{
        int rc;

        /* Preparation for unregistering fcf */
        rc = lpfc_unregister_fcf_prep(phba);
        if (rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_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);
}

/**
 * lpfc_unregister_unused_fcf - Unregister FCF if all devices are disconnected.
 * @phba: Pointer to hba context object.
 *
 * This function check if there are any connected remote port for the FCF and
 * if all the devices are disconnected, this function unregister FCFI.
 * This function also tries to use another FCF for discovery.
 */
void
lpfc_unregister_unused_fcf(struct lpfc_hba *phba)
{
        /*
         * If HBA is not running in FIP mode, if HBA does not support
         * FCoE, if FCF discovery is ongoing, or if FCF has not been
         * registered, do nothing.
         */
        spin_lock_irq(&phba->hbalock);
        if (!(phba->hba_flag & HBA_FCOE_MODE) ||
            !(phba->fcf.fcf_flag & FCF_REGISTERED) ||
            !(phba->hba_flag & HBA_FIP_SUPPORT) ||
            (phba->fcf.fcf_flag & FCF_DISCOVERY) ||
            (phba->pport->port_state == LPFC_FLOGI)) {
                spin_unlock_irq(&phba->hbalock);
                return;
        }
        spin_unlock_irq(&phba->hbalock);

        if (lpfc_fcf_inuse(phba))
                return;

        lpfc_unregister_fcf_rescan(phba);
}

/**
 * lpfc_read_fcf_conn_tbl - Create driver FCF connection table.
 * @phba: Pointer to hba context object.
 * @buff: Buffer containing the FCF connection table as in the config
 *         region.
 * This function create driver data structure for the FCF connection
 * record table read from config region 23.
 */
static void
lpfc_read_fcf_conn_tbl(struct lpfc_hba *phba,
        uint8_t *buff)
{
        struct lpfc_fcf_conn_entry *conn_entry, *next_conn_entry;
        struct lpfc_fcf_conn_hdr *conn_hdr;
        struct lpfc_fcf_conn_rec *conn_rec;
        uint32_t record_count;
        int i;

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

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

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

        for (i = 0; i < record_count; i++) {
                if (!(conn_rec[i].flags & FCFCNCT_VALID))
                        continue;
                conn_entry = kzalloc(sizeof(struct lpfc_fcf_conn_entry),
                        GFP_KERNEL);
                if (!conn_entry) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_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);
        }
}

/**
 * lpfc_read_fcoe_param - Read FCoe parameters from conf region..
 * @phba: Pointer to hba context object.
 * @buff: Buffer containing the FCoE parameter data structure.
 *
 *  This function update driver data structure with config
 *  parameters read from config region 23.
 */
static void
lpfc_read_fcoe_param(struct lpfc_hba *phba,
                        uint8_t *buff)
{
        struct lpfc_fip_param_hdr *fcoe_param_hdr;
        struct lpfc_fcoe_params *fcoe_param;

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

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

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

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

/**
 * lpfc_get_rec_conf23 - Get a record type in config region data.
 * @buff: Buffer containing config region 23 data.
 * @size: Size of the data buffer.
 * @rec_type: Record type to be searched.
 *
 * This function searches config region data to find the beginning
 * of the record specified by record_type. If record found, this
 * function return pointer to the record else return NULL.
 */
static uint8_t *
lpfc_get_rec_conf23(uint8_t *buff, uint32_t size, uint8_t rec_type)
{
        uint32_t offset = 0, rec_length;

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

        rec_length = buff[offset + 1];

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

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

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

/**
 * lpfc_parse_fcoe_conf - Parse FCoE config data read from config region 23.
 * @phba: Pointer to lpfc_hba data structure.
 * @buff: Buffer containing config region 23 data.
 * @size: Size of the data buffer.
 *
 * This function parses the FCoE config parameters in config region 23 and
 * populate driver data structure with the parameters.
 */
void
lpfc_parse_fcoe_conf(struct lpfc_hba *phba,
                uint8_t *buff,
                uint32_t size)
{
        uint32_t offset = 0, 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);

}