/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2008 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/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_hw.h"
#include "lpfc_nl.h"
#include "lpfc_disc.h"
#include "lpfc_sli.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);

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->vport->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);

        /* 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;

        evtp = &ndlp->dev_loss_evt;

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

        spin_lock_irq(&phba->hbalock);
        /* We need to hold the node by incrementing the reference
         * count until this queued work is done
         */
        evtp->evt_arg1  = lpfc_nlp_get(ndlp);
        if (evtp->evt_arg1) {
                evtp->evt = LPFC_EVT_DEV_LOSS;
                list_add_tail(&evtp->evt_listp, &phba->work_list);
                lpfc_worker_wake_up(phba);
        }
        spin_unlock_irq(&phba->hbalock);

        return;
}

/*
 * This function is called from the worker thread when dev_loss_tmo
 * expire.
 */
static void
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;

        rport = ndlp->rport;

        if (!rport)
                return;

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

        /* 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;
        }

        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;
        }

        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;
        }

        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))
                lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
}

/**
 * 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 == IOSTAT_NPORT_BSY)) {
                        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,
                SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_EMULEX);

        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;

        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);
                        lpfc_dev_loss_tmo_handler(ndlp);
                        free_evt = 0;
                        /* decrement the node reference count held for
                         * this queued work
                         */
                        lpfc_nlp_put(ndlp);
                        break;
                case LPFC_EVT_ONLINE:
                        if (phba->link_state < LPFC_LINK_DOWN)
                                *(int *) (evtp->evt_arg1) = lpfc_online(phba);
                        else
                                *(int *) (evtp->evt_arg1) = 0;
                        complete((struct completion *)(evtp->evt_arg2));
                        break;
                case LPFC_EVT_OFFLINE_PREP:
                        if (phba->link_state >= LPFC_LINK_DOWN)
                                lpfc_offline_prep(phba);
                        *(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;
                }
                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);

        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);

        vports = lpfc_create_vport_work_array(phba);
        if (vports != NULL)
                for(i = 0; i <= phba->max_vpi; 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);
                }
        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)) {
                if (pring->flag & LPFC_STOP_IOCB_EVENT) {
                        pring->flag |= LPFC_DEFERRED_RING_EVENT;
                        /* Set the lpfc data pending flag */
                        set_bit(LPFC_DATA_READY, &phba->data_flags);
                } else {
                        pring->flag &= ~LPFC_DEFERRED_RING_EVENT;
                        lpfc_sli_handle_slow_ring_event(phba, pring,
                                                        (status &
                                                         HA_RXMASK));
                }
                /*
                 * Turn on Ring interrupts
                 */
                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);
        phba->data_flags = 0;

        while (1) {
                /* 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()));
                BUG_ON(rc);

                if (kthread_should_stop())
                        break;

                /* Attend pending lpfc data processing */
                lpfc_work_done(phba);
        }
        return 0;
}

/*
 * This is only called to handle FC worker events. Since this a rare
 * occurance, 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 (!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) {
                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)
{
        /* 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);
}

static 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);

}

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;
        spin_lock_irq(&phba->hbalock);
        if (phba->link_state > LPFC_LINK_DOWN) {
                phba->link_state = LPFC_LINK_DOWN;
                phba->pport->fc_flag &= ~FC_LBIT;
        }
        spin_unlock_irq(&phba->hbalock);
        vports = lpfc_create_vport_work_array(phba);
        if (vports != NULL)
                for(i = 0; i <= phba->max_vpi && 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, 0xffffffff, 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;

        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_vpi && vports[i] != NULL; i++)
                        lpfc_linkup_port(vports[i]);
        lpfc_destroy_vport_work_array(phba, vports);
        if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
                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->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->mb.mbxStatus)
                goto out;

        mempool_free(pmb, phba->mbox_mem_pool);

        if (phba->fc_topology == 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) {
                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->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;
}

static void
lpfc_mbx_cmpl_read_sparam(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
        MAILBOX_t *mb = &pmb->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));
        if (phba->cfg_soft_wwnn)
                u64_to_wwn(phba->cfg_soft_wwnn,
                           vport->fc_sparam.nodeName.u.wwn);
        if (phba->cfg_soft_wwpn)
                u64_to_wwn(phba->cfg_soft_wwpn,
                           vport->fc_sparam.portName.u.wwn);
        memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
               sizeof(vport->fc_nodename));
        memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
               sizeof(vport->fc_portname));
        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, READ_LA_VAR *la)
{
        struct lpfc_vport *vport = phba->pport;
        LPFC_MBOXQ_t *sparam_mbox, *cfglink_mbox;
        int i;
        struct lpfc_dmabuf *mp;
        int rc;

        sparam_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        cfglink_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);

        spin_lock_irq(&phba->hbalock);
        switch (la->UlnkSpeed) {
        case LA_1GHZ_LINK:
                phba->fc_linkspeed = LA_1GHZ_LINK;
                break;
        case LA_2GHZ_LINK:
                phba->fc_linkspeed = LA_2GHZ_LINK;
                break;
        case LA_4GHZ_LINK:
                phba->fc_linkspeed = LA_4GHZ_LINK;
                break;
        case LA_8GHZ_LINK:
                phba->fc_linkspeed = LA_8GHZ_LINK;
                break;
        default:
                phba->fc_linkspeed = LA_UNKNW_LINK;
                break;
        }

        phba->fc_topology = la->topology;
        phba->link_flag &= ~LS_NPIV_FAB_SUPPORTED;

        if (phba->fc_topology == TOPOLOGY_LOOP) {
                phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;

                if (phba->cfg_enable_npiv)
                        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 (la->il)
                        vport->fc_flag |= FC_LBIT;

                vport->fc_myDID = la->granted_AL_PA;
                i = la->un.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 == 3))
                                phba->sli3_options |= LPFC_SLI3_NPIV_ENABLED;
                }
                vport->fc_myDID = phba->fc_pref_DID;
                vport->fc_flag |= FC_LBIT;
        }
        spin_unlock_irq(&phba->hbalock);

        lpfc_linkup(phba);
        if (sparam_mbox) {
                lpfc_read_sparam(phba, sparam_mbox, 0);
                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);
                        if (cfglink_mbox)
                                mempool_free(cfglink_mbox, phba->mbox_mem_pool);
                        goto out;
                }
        }

        if (cfglink_mbox) {
                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)
                        return;
                mempool_free(cfglink_mbox, phba->mbox_mem_pool);
        }
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;
        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);
        /* turn on Link Attention interrupts - no CLEAR_LA needed */
}


/*
 * This routine handles processing a READ_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.
 */
void
lpfc_mbx_cmpl_read_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
        struct lpfc_vport *vport = pmb->vport;
        struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
        READ_LA_VAR *la;
        MAILBOX_t *mb = &pmb->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_la_free_mbuf;
        }

        la = (READ_LA_VAR *) & pmb->mb.un.varReadLA;

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

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

        if (((phba->fc_eventTag + 1) < la->eventTag) ||
            (phba->fc_eventTag == la->eventTag)) {
                phba->fc_stat.LinkMultiEvent++;
                if (la->attType == AT_LINK_UP)
                        if (phba->fc_eventTag != 0)
                                lpfc_linkdown(phba);
        }

        phba->fc_eventTag = la->eventTag;
        if (la->mm)
                phba->sli.sli_flag |= LPFC_MENLO_MAINT;
        else
                phba->sli.sli_flag &= ~LPFC_MENLO_MAINT;

        if (la->attType == AT_LINK_UP && (!la->mm)) {
                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,
                                        la->granted_AL_PA, la->UlnkSpeed,
                                        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,
                                        la->granted_AL_PA, la->UlnkSpeed,
                                        phba->alpa_map[0],
                                        la->mm, la->fa,
                                        phba->wait_4_mlo_maint_flg);
                }
                lpfc_mbx_process_link_up(phba, la);
        } else if (la->attType == AT_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,
                                la->mm, la->fa);
                }
                lpfc_mbx_issue_link_down(phba);
        }
        if (la->mm && la->attType == AT_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 (la->fa) {
                if (la->mm)
                        lpfc_issue_clear_la(phba, vport);
                lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
                                "1311 fa %d\n", la->fa);
        }

lpfc_mbx_cmpl_read_la_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;

        pmb->context1 = NULL;

        /* 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->mb;
        struct lpfc_vport *vport = pmb->vport;
        struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);

        switch (mb->mbxStatus) {
        case 0x0011:
        case 0x0020:
        case 0x9700:
                lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
                                 "0911 cmpl_unreg_vpi, mb status = 0x%x\n",
                                 mb->mbxStatus);
                break;
        }
        vport->unreg_vpi_cmpl = VPORT_OK;
        mempool_free(pmb, phba->mbox_mem_pool);
        /*
         * This shost reference might have been taken at the beginning of
         * lpfc_vport_delete()
         */
        if (vport->load_flag & FC_UNLOADING)
                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->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;
        }

        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;
}

/*
 * 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->mb;
        struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
        struct lpfc_nodelist *ndlp;
        struct lpfc_vport **vports;
        int i;

        ndlp = (struct lpfc_nodelist *) pmb->context2;
        pmb->context1 = NULL;
        pmb->context2 = NULL;
        if (mb->mbxStatus) {
                lpfc_mbuf_free(phba, mp->virt, mp->phys);
                kfree(mp);
                mempool_free(pmb, phba->mbox_mem_pool);

                if (phba->fc_topology == 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);
                lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
                                 "0258 Register Fabric login error: 0x%x\n",
                                 mb->mbxStatus);
                /* Decrement the reference count to ndlp after the reference
                 * to the ndlp are done.
                 */
                lpfc_nlp_put(ndlp);
                return;
        }

        ndlp->nlp_rpi = mb->un.varWords[0];
        ndlp->nlp_type |= NLP_FABRIC;
        lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);

        if (vport->port_state == LPFC_FABRIC_CFG_LINK) {
                vports = lpfc_create_vport_work_array(phba);
                if (vports != NULL)
                        for(i = 0;
                            i <= phba->max_vpi && vports[i] != NULL;
                            i++) {
                                if (vports[i]->port_type == LPFC_PHYSICAL_PORT)
                                        continue;
                                if (phba->fc_topology == TOPOLOGY_LOOP) {
                                        lpfc_vport_set_state(vports[i],
                                                        FC_VPORT_LINKDOWN);
                                        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(vport, KERN_ERR,
                                                         LOG_ELS,
                                                        "0259 No NPIV "
                                                        "Fabric support\n");
                                }
                        }
                lpfc_destroy_vport_work_array(phba, vports);
                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->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;

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

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

                if (phba->fc_topology == 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);
                lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
                                 "0260 Register NameServer error: 0x%x\n",
                                 mb->mbxStatus);
                return;
        }

        pmb->context1 = NULL;

        ndlp->nlp_rpi = mb->un.varWords[0];
        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);

        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);

        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);

        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_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
                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_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);
}

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));
        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->nlp_sid = NLP_NO_SID;
        /* ndlp management re-initialize */
        kref_init(&ndlp->kref);
        NLP_INT_NODE_ACT(ndlp);

        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);
        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 then edtov */
                tmo = (((phba->fc_edtov + 999) / 1000) + 1);
        } else {
                /* Normal discovery timeout should be > then ELS/CT timeout
                 * FC spec states we need 3 * ratov for CT requests
                 */
                tmo = ((phba->fc_ratov * 3) + 3);
        }


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

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

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

        return;
}

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

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

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

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

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

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

        if (pring->ringno == LPFC_ELS_RING) {
                switch (icmd->ulpCommand) {
                case CMD_GEN_REQUEST64_CR:
                        if (icmd->ulpContext == (volatile ushort)ndlp->nlp_rpi)
                                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;
        IOCB_t *icmd;
        uint32_t rpi, i;

        lpfc_fabric_abort_nport(ndlp);

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

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

        while (!list_empty(&completions)) {
                iocb = list_get_first(&completions, struct lpfc_iocbq, list);
                list_del_init(&iocb->list);

                if (!iocb->iocb_cmpl)
                        lpfc_sli_release_iocbq(phba, iocb);
                else {
                        icmd = &iocb->iocb;
                        icmd->ulpStatus = IOSTAT_LOCAL_REJECT;
                        icmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
                        (iocb->iocb_cmpl)(phba, iocb, iocb);
                }
        }

        return 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;

        if (ndlp->nlp_rpi) {
                mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
                if (mbox) {
                        lpfc_unreg_login(phba, vport->vpi, ndlp->nlp_rpi, mbox);
                        mbox->vport = vport;
                        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);
                ndlp->nlp_rpi = 0;
                return 1;
        }
        return 0;
}

void
lpfc_unreg_all_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_login(phba, vport->vpi, 0xffff, 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_NOT_FINISHED) {
                        mempool_free(mbox, phba->mbox_mem_pool);
                }
        }
}

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, 0xffffffff, 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_NOT_FINISHED) {
                        lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
                                         "1815 Could not issue "
                                         "unreg_did (default rpis)\n");
                        mempool_free(mbox, phba->mbox_mem_pool);
                }
        }
}

/*
 * 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);
        }

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

        spin_lock_irq(&phba->hbalock);
        list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
                if ((mb->mb.mbxCommand == MBX_REG_LOGIN64) &&
                    (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_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_rpi) {
                /* 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_login(phba, vport->vpi, ndlp->nlp_DID,
                            (uint8_t *) &vport->fc_sparam, mbox, 0);
                        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 = NULL;
                                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;

        spin_lock_irq(shost->host_lock);
        ndlp = __lpfc_findnode_did(vport, did);
        spin_unlock_irq(shost->host_lock);
        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 recieved a PLOGI from this NPort
                         * we don't need to try to discover it again.
                         */
                        if (ndlp->nlp_flag & NLP_RCV_PLOGI)
                                return NULL;

                        spin_lock_irq(shost->host_lock);
                        ndlp->nlp_flag |= NLP_NPR_2B_DISC;
                        spin_unlock_irq(shost->host_lock);

                        /* Since this node is marked for discovery,
                         * delay timeout is not needed.
                         */
                        lpfc_cancel_retry_delay_tmo(vport, ndlp);
                } else
                        ndlp = NULL;
        } else {
                /* If we've already recieved 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 != 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))
                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(phba, vport->vpi, vport->fc_myDID, regvpimbox);
                regvpimbox->mbox_cmpl = lpfc_mbx_cmpl_reg_vpi;
                regvpimbox->vport = vport;
                if (lpfc_sli_issue_mbox(phba, regvpimbox, MBX_NOWAIT)
                                        == MBX_NOT_FINISHED) {
                        mempool_free(regvpimbox, phba->mbox_mem_pool);
                }
        }
}

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

        if (!lpfc_is_link_up(phba))
                return;

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

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

        lpfc_set_disctmo(vport);

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

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

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

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

        if (num_sent)
                return;

        /*
         * For SLI3, cmpl_reg_vpi will set port_state to READY, and
         * continue discovery.
         */
        if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
            !(vport->fc_flag & FC_PT2PT) &&
            !(vport->fc_flag & FC_RSCN_MODE)) {
                lpfc_issue_reg_vpi(phba, vport);
                return;
        }

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

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

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

                if (num_sent)
                        return;

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

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

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

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

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

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

        while (!list_empty(&completions)) {
                iocb = list_get_first(&completions, struct lpfc_iocbq, list);
                list_del_init(&iocb->list);

                if (!iocb->iocb_cmpl)
                        lpfc_sli_release_iocbq(phba, iocb);
                else {
                        icmd = &iocb->iocb;
                        icmd->ulpStatus = IOSTAT_LOCAL_REJECT;
                        icmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
                        (iocb->iocb_cmpl) (phba, iocb, iocb);
                }
        }
}

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) {
                        lpfc_initial_flogi(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->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;
                }

                /* 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->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->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);