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lpfc_hbadisc.c

/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2007 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_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 *);

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) {
            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);
      }

      /*
       * A device is normally blocked for rediscovery and unblocked when
       * devloss timeout happens.  In case a vport is removed or driver
       * unloaded before devloss timeout happens, we need to unblock here.
       */
      scsi_target_unblock(&rport->dev);
      return;
}

/*
 * 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 completion devloss_compl;
      struct lpfc_work_evt *evtp;

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

      if (!ndlp) {
            if (rport->scsi_target_id != -1) {
                  printk(KERN_ERR "Cannot find remote node"
                        " for rport in dev_loss_tmo_callbk x%x\n",
                        rport->port_id);
            }
            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);

      init_completion(&devloss_compl);
      evtp = &ndlp->dev_loss_evt;

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

      spin_lock_irq(&phba->hbalock);
      evtp->evt_arg1  = ndlp;
      evtp->evt_arg2  = &devloss_compl;
      evtp->evt       = LPFC_EVT_DEV_LOSS;
      list_add_tail(&evtp->evt_listp, &phba->work_list);
      if (phba->work_wait)
            wake_up(phba->work_wait);

      spin_unlock_irq(&phba->hbalock);

      wait_for_completion(&devloss_compl);

      return;
}

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

      if (!(vport->load_flag & FC_UNLOADING) &&
          ndlp->nlp_state == NLP_STE_MAPPED_NODE)
            return;

      if (ndlp->nlp_type & NLP_FABRIC) {
            int  put_node;
            int  put_rport;

            /* 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 (vport->load_flag & FC_UNLOADING)
            warn_on = 0;

      if (warn_on) {
            lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
                         "0203 Devloss timeout on "
                         "WWPN %x:%x:%x:%x:%x:%x:%x:%x "
                         "NPort x%x 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 %x:%x:%x:%x:%x:%x:%x:%x "
                         "NPort x%x Data: x%x x%x x%x\n",
                         *name, *(name+1), *(name+2), *(name+3),
                         *(name+4), *(name+5), *(name+6), *(name+7),
                         ndlp->nlp_DID, ndlp->nlp_flag,
                         ndlp->nlp_state, ndlp->nlp_rpi);
      }

      if (!(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);
      else {
            int  put_node;
            int  put_rport;

            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);
      }
}


void
lpfc_worker_wake_up(struct lpfc_hba *phba)
{
      wake_up(phba->work_wait);
      return;
}

static void
lpfc_work_list_done(struct lpfc_hba *phba)
{
      struct lpfc_work_evt  *evtp = NULL;
      struct lpfc_nodelist  *ndlp;
      struct lpfc_vport     *vport;
      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_DEV_LOSS_DELAY:
                  free_evt = 0; /* evt is part of ndlp */
                  ndlp = (struct lpfc_nodelist *) (evtp->evt_arg1);
                  vport = ndlp->vport;
                  if (!vport)
                        break;

                  lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
                        "rport devlossdly:did:x%x flg:x%x",
                        ndlp->nlp_DID, ndlp->nlp_flag, 0);

                  if (!(vport->load_flag & FC_UNLOADING) &&
                      !(ndlp->nlp_flag & NLP_DELAY_TMO) &&
                      !(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
                        lpfc_disc_state_machine(vport, ndlp, NULL,
                              NLP_EVT_DEVICE_RM);
                  }
                  break;
            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 */
                  break;
            case LPFC_EVT_DEV_LOSS:
                  ndlp = (struct lpfc_nodelist *)(evtp->evt_arg1);
                  lpfc_nlp_get(ndlp);
                  lpfc_dev_loss_tmo_handler(ndlp);
                  free_evt = 0;
                  complete((struct completion *)(evtp->evt_arg2));
                  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;
            }
            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)
            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 < LPFC_MAX_VPORTS; i++) {
                  /*
                   * We could have no vports in array if unloading, so if
                   * this happens then just use the pport
                   */
                  if (vports[i] == NULL && i == 0)
                        vport = phba->pport;
                  else
                        vport = vports[i];
                  if (vport == NULL)
                        break;
                  work_port_events = vport->work_port_events;
                  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);
                  spin_lock_irq(&vport->work_port_lock);
                  vport->work_port_events &= ~work_port_events;
                  spin_unlock_irq(&vport->work_port_lock);
            }
      lpfc_destroy_vport_work_array(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_MASK) {
                  pring->flag |= LPFC_DEFERRED_RING_EVENT;
            } else {
                  lpfc_sli_handle_slow_ring_event(phba, pring,
                                          (status &
                                           HA_RXMASK));
                  pring->flag &= ~LPFC_DEFERRED_RING_EVENT;
            }
            /*
             * 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);
}

static int
check_work_wait_done(struct lpfc_hba *phba)
{
      struct lpfc_vport *vport;
      struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
      int rc = 0;

      spin_lock_irq(&phba->hbalock);
      list_for_each_entry(vport, &phba->port_list, listentry) {
            if (vport->work_port_events) {
                  rc = 1;
                  break;
            }
      }
      if (rc || phba->work_ha || (!list_empty(&phba->work_list)) ||
          kthread_should_stop() || pring->flag & LPFC_DEFERRED_RING_EVENT) {
            rc = 1;
            phba->work_found++;
      } else
            phba->work_found = 0;
      spin_unlock_irq(&phba->hbalock);
      return rc;
}


int
lpfc_do_work(void *p)
{
      struct lpfc_hba *phba = p;
      int rc;
      DECLARE_WAIT_QUEUE_HEAD_ONSTACK(work_waitq);

      set_user_nice(current, -20);
      phba->work_wait = &work_waitq;
      phba->work_found = 0;

      while (1) {

            rc = wait_event_interruptible(work_waitq,
                                    check_work_wait_done(phba));

            BUG_ON(rc);

            if (kthread_should_stop())
                  break;

            lpfc_work_done(phba);

            /* If there is alot of slow ring work, like during link up
             * check_work_wait_done() may cause this thread to not give
             * up the CPU for very long periods of time. This may cause
             * soft lockups or other problems. To avoid these situations
             * give up the CPU here after LPFC_MAX_WORKER_ITERATION
             * consecutive iterations.
             */
            if (phba->work_found >= LPFC_MAX_WORKER_ITERATION) {
                  phba->work_found = 0;
                  schedule();
            }
      }
      phba->work_wait = NULL;
      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);
      if (phba->work_wait)
            lpfc_worker_wake_up(phba);
      spin_unlock_irqrestore(&phba->hbalock, flags);

      return 1;
}

void
lpfc_cleanup_rpis(struct lpfc_vport *vport, int remove)
{
      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 (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
                  continue;

            if (phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN)
                  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);
            vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
      }
}

static void
lpfc_linkdown_port(struct lpfc_vport *vport)
{
      struct lpfc_nodelist *ndlp, *next_ndlp;
      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);

      /* 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);

      /* free any ndlp's on unused list */
      list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp)
            if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
                  lpfc_drop_node(vport, ndlp);

      /* Turn off discovery timer if its running */
      lpfc_can_disctmo(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 < LPFC_MAX_VPORTS && vports[i] != NULL; i++) {
                  /* Issue a LINK DOWN event to all nodes */
                  lpfc_linkdown_port(vports[i]);
            }
      lpfc_destroy_vport_work_array(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_STOP_IOCB))
                == 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_STOP_IOCB))
                      == 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 (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_nodelist *ndlp, *next_ndlp;
      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);

                        /* free any ndlp's in unused state */
      list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
                         nlp_listp)
            if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
                  lpfc_drop_node(vport, ndlp);
}

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 < LPFC_MAX_VPORTS && vports[i] != NULL; i++)
                  lpfc_linkup_port(vports[i]);
      lpfc_destroy_vport_work_array(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.
 */
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);
      return;

      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);
      }

      vport->port_state = LPFC_VPORT_READY;

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 | FC_ESTABLISH_LINK);
      spin_unlock_irq(shost->host_lock);

      del_timer_sync(&phba->fc_estabtmo);

      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) {
            vport->port_state = LPFC_FLOGI;
            lpfc_set_disctmo(vport);
            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;

                        /* 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 | MBX_STOP_IOCB));
            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 | MBX_STOP_IOCB));
            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_mbx_issue_link_down(struct lpfc_hba *phba)
{
      uint32_t control;
      struct lpfc_sli *psli = &phba->sli;

      lpfc_linkdown(phba);

      /* turn on Link Attention interrupts - no CLEAR_LA needed */
      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);
}

/*
 * 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);

      /* 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->attType == AT_LINK_UP) {
            phba->fc_stat.LinkUp++;
            if (phba->link_flag & LS_LOOPBACK_MODE) {
                  lpfc_printf_log(phba, KERN_INFO, 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\n",
                              la->eventTag, phba->fc_eventTag,
                              la->granted_AL_PA, la->UlnkSpeed,
                              phba->alpa_map[0]);
            }
            lpfc_mbx_process_link_up(phba, la);
      } else {
            phba->fc_stat.LinkDown++;
            lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
                        "1305 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);
      }

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);
      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);
}

void
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;

      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 | MBX_STOP_IOCB));
      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;
      }
}

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);
            lpfc_nlp_put(ndlp);

            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);
                  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);
            return;
      }

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

      lpfc_nlp_put(ndlp);     /* Drop the reference from the mbox */

      if (vport->port_state == LPFC_FABRIC_CFG_LINK) {
            vports = lpfc_create_vport_work_array(phba);
            if (vports != NULL)
                  for(i = 0;
                      i < LPFC_MAX_VPORTS && vports[i] != NULL;
                      i++) {
                        if (vports[i]->port_type == LPFC_PHYSICAL_PORT)
                              continue;
                        if (phba->link_flag & LS_NPIV_FAB_SUPPORTED)
                              lpfc_initial_fdisc(vports[i]);
                        else if (phba->sli3_options &
                                    LPFC_SLI3_NPIV_ENABLED) {
                              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(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);
      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:
            lpfc_nlp_put(ndlp);
            lpfc_mbuf_free(phba, mp->virt, mp->phys);
            kfree(mp);
            mempool_free(pmb, phba->mbox_mem_pool);
            lpfc_drop_node(vport, 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;
      }

      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 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 &&
          (ndlp->nlp_flag & NLP_DELAY_TMO) != 0 &&
          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_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
      struct Scsi_Host *shost = lpfc_shost_from_vport(vport);

      if ((ndlp->nlp_flag & NLP_DELAY_TMO) != 0)
            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);
}

void
lpfc_drop_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
      lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNUSED_NODE);
      lpfc_nlp_put(ndlp);
}

/*
 * 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 | MBX_STOP_IOCB));
                  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;
            rc = lpfc_sli_issue_mbox(phba, mbox,
                               (MBX_NOWAIT | MBX_STOP_IOCB));
            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;
            rc = lpfc_sli_issue_mbox(phba, mbox,
                               (MBX_NOWAIT | MBX_STOP_IOCB));
            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);
      lpfc_dequeue_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);
                  lpfc_nlp_put(ndlp);
            }
      }
      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);

      if (!list_empty(&ndlp->els_retry_evt.evt_listp))
            list_del_init(&ndlp->els_retry_evt.evt_listp);
      if (!list_empty(&ndlp->dev_loss_evt.evt_listp))
            list_del_init(&ndlp->dev_loss_evt.evt_listp);

      if (!list_empty(&ndlp->dev_loss_evt.evt_listp)) {
            list_del_init(&ndlp->dev_loss_evt.evt_listp);
            complete((struct completion *)(ndlp->dev_loss_evt.evt_arg2));
      }

      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_rport_data *rdata;

      if (ndlp->nlp_flag & NLP_DELAY_TMO) {
            lpfc_cancel_retry_delay_tmo(vport, ndlp);
      }

      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;

      if (ndlp->nlp_DID == 0) {
            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;
      }
      if (vport->fc_flag & FC_RSCN_MODE) {
            if (lpfc_rscn_payload_check(vport, did)) {
                  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.
                   */
                  if (ndlp->nlp_flag & NLP_DELAY_TMO)
                        lpfc_cancel_retry_delay_tmo(vport, ndlp);
            } else
                  ndlp = NULL;
      } else {
            if (ndlp->nlp_state == NLP_STE_ADISC_ISSUE ||
                ndlp->nlp_state == NLP_STE_PLOGI_ISSUE)
                  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 |
                                          MBX_STOP_IOCB));
            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_STOP_IOCB))
                              == 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_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);
            }
      }
}

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 (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
                      ndlp->nlp_state == NLP_STE_ADISC_ISSUE) {
                        lpfc_free_tx(phba, ndlp);
                        lpfc_nlp_put(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;
      unsigned long flags = 0;

      if (unlikely(!phba))
            return;

      if ((vport->work_port_events & WORKER_DISC_TMO) == 0) {
            spin_lock_irqsave(&vport->work_port_lock, flags);
            vport->work_port_events |= WORKER_DISC_TMO;
            spin_unlock_irqrestore(&vport->work_port_lock, flags);

            spin_lock_irqsave(&phba->hbalock, flags);
            if (phba->work_wait)
                  lpfc_worker_wake_up(phba);
            spin_unlock_irqrestore(&phba->hbalock, flags);
      }
      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 (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) {
                  vport->port_state = LPFC_FLOGI;
                  lpfc_set_disctmo(vport);
                  lpfc_initial_flogi(vport);
            }
            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 ? "FLOGI" : "FDISC");

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

      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;

            /*
             * 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 | MBX_STOP_IOCB));
            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,
                         "0229 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_UNKNOWN:
      case LPFC_WARM_START:
      case LPFC_INIT_START:
      case LPFC_INIT_MBX_CMDS:
      case LPFC_LINK_DOWN:
      case LPFC_LINK_UP:
      case LPFC_HBA_ERROR:
            lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
                         "0230 Unexpected timeout, hba link "
                         "state x%x\n", phba->link_state);
            clrlaerr = 1;
            break;

      case LPFC_HBA_READY:
            break;
      }

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

      return;
}

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

      pmb->context1 = NULL;

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

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

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

                        /* Mailbox took a reference to the node */
      lpfc_nlp_put(ndlp);
      lpfc_mbuf_free(phba, mp->virt, mp->phys);
      kfree(mp);
      mempool_free(pmb, phba->mbox_mem_pool);

      return;
}

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

      return ndlp->nlp_rpi == *rpi;
}

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

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

      list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
            if (ndlp->nlp_state != NLP_STE_UNUSED_NODE &&
                filter(ndlp, param))
                  return ndlp;
      }
      return NULL;
}

/*
 * Search node lists for a remote port matching filter criteria
 * Caller needs to hold host_lock before calling this routine.
 */
struct lpfc_nodelist *
lpfc_find_node(struct lpfc_vport *vport, node_filter filter, void *param)
{
      struct Scsi_Host     *shost = lpfc_shost_from_vport(vport);
      struct lpfc_nodelist *ndlp;

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

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

struct lpfc_nodelist *
lpfc_findnode_rpi(struct lpfc_vport *vport, uint16_t rpi)
{
      struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
      struct lpfc_nodelist *ndlp;

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

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

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

void
lpfc_nlp_init(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
            uint32_t did)
{
      memset(ndlp, 0, sizeof (struct lpfc_nodelist));
      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;
      INIT_LIST_HEAD(&ndlp->nlp_listp);
      kref_init(&ndlp->kref);

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

      return;
}

static void
lpfc_nlp_release(struct kref *kref)
{
      struct lpfc_nodelist *ndlp = container_of(kref, struct lpfc_nodelist,
                                      kref);

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

      lpfc_nlp_remove(ndlp->vport, ndlp);
      mempool_free(ndlp, ndlp->vport->phba->nlp_mem_pool);
}

struct lpfc_nodelist *
lpfc_nlp_get(struct lpfc_nodelist *ndlp)
{
      if (ndlp)
            kref_get(&ndlp->kref);
      return ndlp;
}

int
lpfc_nlp_put(struct lpfc_nodelist *ndlp)
{
      return ndlp ? kref_put(&ndlp->kref, lpfc_nlp_release) : 0;
}

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