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ql4_init.c

/*
 * QLogic iSCSI HBA Driver
 * Copyright (c)  2003-2006 QLogic Corporation
 *
 * See LICENSE.qla4xxx for copyright and licensing details.
 */

#include "ql4_def.h"
#include "ql4_glbl.h"
#include "ql4_dbg.h"
#include "ql4_inline.h"

static struct ddb_entry * qla4xxx_alloc_ddb(struct scsi_qla_host *ha,
                                  uint32_t fw_ddb_index);

static void ql4xxx_set_mac_number(struct scsi_qla_host *ha)
{
      uint32_t value;
      uint8_t func_number;
      unsigned long flags;

      /* Get the function number */
      spin_lock_irqsave(&ha->hardware_lock, flags);
      value = readw(&ha->reg->ctrl_status);
      spin_unlock_irqrestore(&ha->hardware_lock, flags);

      func_number = (uint8_t) ((value >> 4) & 0x30);
      switch (value & ISP_CONTROL_FN_MASK) {
      case ISP_CONTROL_FN0_SCSI:
            ha->mac_index = 1;
            break;
      case ISP_CONTROL_FN1_SCSI:
            ha->mac_index = 3;
            break;
      default:
            DEBUG2(printk("scsi%ld: %s: Invalid function number, "
                        "ispControlStatus = 0x%x\n", ha->host_no,
                        __func__, value));
            break;
      }
      DEBUG2(printk("scsi%ld: %s: mac_index %d.\n", ha->host_no, __func__,
                  ha->mac_index));
}

/**
 * qla4xxx_free_ddb - deallocate ddb
 * @ha: pointer to host adapter structure.
 * @ddb_entry: pointer to device database entry
 *
 * This routine deallocates and unlinks the specified ddb_entry from the
 * adapter's
 **/
static void qla4xxx_free_ddb(struct scsi_qla_host *ha,
                       struct ddb_entry *ddb_entry)
{
      /* Remove device entry from list */
      list_del_init(&ddb_entry->list);

      /* Remove device pointer from index mapping arrays */
      ha->fw_ddb_index_map[ddb_entry->fw_ddb_index] =
            (struct ddb_entry *) INVALID_ENTRY;
      ha->tot_ddbs--;

      /* Free memory and scsi-ml struct for device entry */
      qla4xxx_destroy_sess(ddb_entry);
}

/**
 * qla4xxx_free_ddb_list - deallocate all ddbs
 * @ha: pointer to host adapter structure.
 *
 * This routine deallocates and removes all devices on the sppecified adapter.
 **/
void qla4xxx_free_ddb_list(struct scsi_qla_host *ha)
{
      struct list_head *ptr;
      struct ddb_entry *ddb_entry;

      while (!list_empty(&ha->ddb_list)) {
            ptr = ha->ddb_list.next;
            /* Free memory for device entry and remove */
            ddb_entry = list_entry(ptr, struct ddb_entry, list);
            qla4xxx_free_ddb(ha, ddb_entry);
      }
}

/**
 * qla4xxx_init_rings - initialize hw queues
 * @ha: pointer to host adapter structure.
 *
 * This routine initializes the internal queues for the specified adapter.
 * The QLA4010 requires us to restart the queues at index 0.
 * The QLA4000 doesn't care, so just default to QLA4010's requirement.
 **/
int qla4xxx_init_rings(struct scsi_qla_host *ha)
{
      unsigned long flags = 0;

      /* Initialize request queue. */
      spin_lock_irqsave(&ha->hardware_lock, flags);
      ha->request_out = 0;
      ha->request_in = 0;
      ha->request_ptr = &ha->request_ring[ha->request_in];
      ha->req_q_count = REQUEST_QUEUE_DEPTH;

      /* Initialize response queue. */
      ha->response_in = 0;
      ha->response_out = 0;
      ha->response_ptr = &ha->response_ring[ha->response_out];

      /*
       * Initialize DMA Shadow registers.  The firmware is really supposed to
       * take care of this, but on some uniprocessor systems, the shadow
       * registers aren't cleared-- causing the interrupt_handler to think
       * there are responses to be processed when there aren't.
       */
      ha->shadow_regs->req_q_out = __constant_cpu_to_le32(0);
      ha->shadow_regs->rsp_q_in = __constant_cpu_to_le32(0);
      wmb();

      writel(0, &ha->reg->req_q_in);
      writel(0, &ha->reg->rsp_q_out);
      readl(&ha->reg->rsp_q_out);

      spin_unlock_irqrestore(&ha->hardware_lock, flags);

      return QLA_SUCCESS;
}

/**
 * qla4xxx_validate_mac_address - validate adapter MAC address(es)
 * @ha: pointer to host adapter structure.
 *
 **/
static int qla4xxx_validate_mac_address(struct scsi_qla_host *ha)
{
      struct flash_sys_info *sys_info;
      dma_addr_t sys_info_dma;
      int status = QLA_ERROR;

      sys_info = dma_alloc_coherent(&ha->pdev->dev, sizeof(*sys_info),
                              &sys_info_dma, GFP_KERNEL);
      if (sys_info == NULL) {
            DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
                        ha->host_no, __func__));

            goto exit_validate_mac_no_free;
      }
      memset(sys_info, 0, sizeof(*sys_info));

      /* Get flash sys info */
      if (qla4xxx_get_flash(ha, sys_info_dma, FLASH_OFFSET_SYS_INFO,
                        sizeof(*sys_info)) != QLA_SUCCESS) {
            DEBUG2(printk("scsi%ld: %s: get_flash FLASH_OFFSET_SYS_INFO "
                        "failed\n", ha->host_no, __func__));

            goto exit_validate_mac;
      }

      /* Save M.A.C. address & serial_number */
      memcpy(ha->my_mac, &sys_info->physAddr[0].address[0],
             min(sizeof(ha->my_mac),
               sizeof(sys_info->physAddr[0].address)));
      memcpy(ha->serial_number, &sys_info->acSerialNumber,
             min(sizeof(ha->serial_number),
               sizeof(sys_info->acSerialNumber)));

      status = QLA_SUCCESS;

 exit_validate_mac:
      dma_free_coherent(&ha->pdev->dev, sizeof(*sys_info), sys_info,
                    sys_info_dma);

 exit_validate_mac_no_free:
      return status;
}

/**
 * qla4xxx_init_local_data - initialize adapter specific local data
 * @ha: pointer to host adapter structure.
 *
 **/
static int qla4xxx_init_local_data(struct scsi_qla_host *ha)
{
      /* Initilize aen queue */
      ha->aen_q_count = MAX_AEN_ENTRIES;

      return qla4xxx_get_firmware_status(ha);
}

static int qla4xxx_fw_ready(struct scsi_qla_host *ha)
{
      uint32_t timeout_count;
      int ready = 0;

      DEBUG2(dev_info(&ha->pdev->dev, "Waiting for Firmware Ready..\n"));
      for (timeout_count = ADAPTER_INIT_TOV; timeout_count > 0;
           timeout_count--) {
            if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
                  qla4xxx_get_dhcp_ip_address(ha);

            /* Get firmware state. */
            if (qla4xxx_get_firmware_state(ha) != QLA_SUCCESS) {
                  DEBUG2(printk("scsi%ld: %s: unable to get firmware "
                              "state\n", ha->host_no, __func__));
                  break;

            }

            if (ha->firmware_state & FW_STATE_ERROR) {
                  DEBUG2(printk("scsi%ld: %s: an unrecoverable error has"
                              " occurred\n", ha->host_no, __func__));
                  break;

            }
            if (ha->firmware_state & FW_STATE_CONFIG_WAIT) {
                  /*
                   * The firmware has not yet been issued an Initialize
                   * Firmware command, so issue it now.
                   */
                  if (qla4xxx_initialize_fw_cb(ha) == QLA_ERROR)
                        break;

                  /* Go back and test for ready state - no wait. */
                  continue;
            }

            if (ha->firmware_state == FW_STATE_READY) {
                  DEBUG2(dev_info(&ha->pdev->dev, "Firmware Ready..\n"));
                  /* The firmware is ready to process SCSI commands. */
                  DEBUG2(dev_info(&ha->pdev->dev,
                                "scsi%ld: %s: MEDIA TYPE - %s\n",
                                ha->host_no,
                                __func__, (ha->addl_fw_state &
                                         FW_ADDSTATE_OPTICAL_MEDIA)
                                != 0 ? "OPTICAL" : "COPPER"));
                  DEBUG2(dev_info(&ha->pdev->dev,
                                "scsi%ld: %s: DHCP STATE Enabled "
                                "%s\n",
                                ha->host_no, __func__,
                                (ha->addl_fw_state &
                                 FW_ADDSTATE_DHCP_ENABLED) != 0 ?
                                "YES" : "NO"));
                  DEBUG2(dev_info(&ha->pdev->dev,
                                "scsi%ld: %s: LINK %s\n",
                                ha->host_no, __func__,
                                (ha->addl_fw_state &
                                 FW_ADDSTATE_LINK_UP) != 0 ?
                                "UP" : "DOWN"));
                  DEBUG2(dev_info(&ha->pdev->dev,
                                "scsi%ld: %s: iSNS Service "
                                "Started %s\n",
                                ha->host_no, __func__,
                                (ha->addl_fw_state &
                                 FW_ADDSTATE_ISNS_SVC_ENABLED) != 0 ?
                                "YES" : "NO"));

                  ready = 1;
                  break;
            }
            DEBUG2(printk("scsi%ld: %s: waiting on fw, state=%x:%x - "
                        "seconds expired= %d\n", ha->host_no, __func__,
                        ha->firmware_state, ha->addl_fw_state,
                        timeout_count));
            if (is_qla4032(ha) &&
                  !(ha->addl_fw_state & FW_ADDSTATE_LINK_UP) &&
                  (timeout_count < ADAPTER_INIT_TOV - 5)) {
                  break;
            }

            msleep(1000);
      }                 /* end of for */

      if (timeout_count == 0)
            DEBUG2(printk("scsi%ld: %s: FW Initialization timed out!\n",
                        ha->host_no, __func__));

      if (ha->firmware_state & FW_STATE_DHCP_IN_PROGRESS)  {
            DEBUG2(printk("scsi%ld: %s: FW is reporting its waiting to"
                        " grab an IP address from DHCP server\n",
                        ha->host_no, __func__));
            ready = 1;
      }

      return ready;
}

/**
 * qla4xxx_init_firmware - initializes the firmware.
 * @ha: pointer to host adapter structure.
 *
 **/
static int qla4xxx_init_firmware(struct scsi_qla_host *ha)
{
      int status = QLA_ERROR;

      dev_info(&ha->pdev->dev, "Initializing firmware..\n");
      if (qla4xxx_initialize_fw_cb(ha) == QLA_ERROR) {
            DEBUG2(printk("scsi%ld: %s: Failed to initialize firmware "
                        "control block\n", ha->host_no, __func__));
            return status;
      }
      if (!qla4xxx_fw_ready(ha))
            return status;

      return qla4xxx_get_firmware_status(ha);
}

static struct ddb_entry* qla4xxx_get_ddb_entry(struct scsi_qla_host *ha,
                                    uint32_t fw_ddb_index,
                                    uint32_t *new_tgt)
{
      struct dev_db_entry *fw_ddb_entry = NULL;
      dma_addr_t fw_ddb_entry_dma;
      struct ddb_entry *ddb_entry = NULL;
      int found = 0;
      uint32_t device_state;

      *new_tgt = 0;
      /* Make sure the dma buffer is valid */
      fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev,
                                sizeof(*fw_ddb_entry),
                                &fw_ddb_entry_dma, GFP_KERNEL);
      if (fw_ddb_entry == NULL) {
            DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
                        ha->host_no, __func__));
            return NULL;
      }

      if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, fw_ddb_entry,
                            fw_ddb_entry_dma, NULL, NULL,
                            &device_state, NULL, NULL, NULL) ==
          QLA_ERROR) {
            DEBUG2(printk("scsi%ld: %s: failed get_ddb_entry for "
                        "fw_ddb_index %d\n", ha->host_no, __func__,
                        fw_ddb_index));
            return NULL;
      }

      /* Allocate DDB if not already allocated. */
      DEBUG2(printk("scsi%ld: %s: Looking for ddb[%d]\n", ha->host_no,
                  __func__, fw_ddb_index));
      list_for_each_entry(ddb_entry, &ha->ddb_list, list) {
            if (memcmp(ddb_entry->iscsi_name, fw_ddb_entry->iscsi_name,
                     ISCSI_NAME_SIZE) == 0) {
                  found++;
                  break;
            }
      }

      if (!found) {
            DEBUG2(printk("scsi%ld: %s: ddb[%d] not found - allocating "
                        "new ddb\n", ha->host_no, __func__,
                        fw_ddb_index));
            *new_tgt = 1;
            ddb_entry = qla4xxx_alloc_ddb(ha, fw_ddb_index);
      }

      /* if not found allocate new ddb */
      dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry), fw_ddb_entry,
                    fw_ddb_entry_dma);

      return ddb_entry;
}

/**
 * qla4xxx_update_ddb_entry - update driver's internal ddb
 * @ha: pointer to host adapter structure.
 * @ddb_entry: pointer to device database structure to be filled
 * @fw_ddb_index: index of the ddb entry in fw ddb table
 *
 * This routine updates the driver's internal device database entry
 * with information retrieved from the firmware's device database
 * entry for the specified device. The ddb_entry->fw_ddb_index field
 * must be initialized prior to     calling this routine
 *
 **/
static int qla4xxx_update_ddb_entry(struct scsi_qla_host *ha,
                            struct ddb_entry *ddb_entry,
                            uint32_t fw_ddb_index)
{
      struct dev_db_entry *fw_ddb_entry = NULL;
      dma_addr_t fw_ddb_entry_dma;
      int status = QLA_ERROR;

      if (ddb_entry == NULL) {
            DEBUG2(printk("scsi%ld: %s: ddb_entry is NULL\n", ha->host_no,
                        __func__));
            goto exit_update_ddb;
      }

      /* Make sure the dma buffer is valid */
      fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev,
                                sizeof(*fw_ddb_entry),
                                &fw_ddb_entry_dma, GFP_KERNEL);
      if (fw_ddb_entry == NULL) {
            DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
                        ha->host_no, __func__));

            goto exit_update_ddb;
      }

      if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, fw_ddb_entry,
                            fw_ddb_entry_dma, NULL, NULL,
                            &ddb_entry->fw_ddb_device_state, NULL,
                            &ddb_entry->tcp_source_port_num,
                            &ddb_entry->connection_id) ==
          QLA_ERROR) {
            DEBUG2(printk("scsi%ld: %s: failed get_ddb_entry for "
                        "fw_ddb_index %d\n", ha->host_no, __func__,
                        fw_ddb_index));

            goto exit_update_ddb;
      }

      status = QLA_SUCCESS;
      ddb_entry->target_session_id = le16_to_cpu(fw_ddb_entry->tsid);
      ddb_entry->task_mgmt_timeout =
            le16_to_cpu(fw_ddb_entry->def_timeout);
      ddb_entry->CmdSn = 0;
      ddb_entry->exe_throttle = le16_to_cpu(fw_ddb_entry->exec_throttle);
      ddb_entry->default_relogin_timeout =
            le16_to_cpu(fw_ddb_entry->def_timeout);
      ddb_entry->default_time2wait = le16_to_cpu(fw_ddb_entry->iscsi_def_time2wait);

      /* Update index in case it changed */
      ddb_entry->fw_ddb_index = fw_ddb_index;
      ha->fw_ddb_index_map[fw_ddb_index] = ddb_entry;

      ddb_entry->port = le16_to_cpu(fw_ddb_entry->port);
      ddb_entry->tpgt = le32_to_cpu(fw_ddb_entry->tgt_portal_grp);
      memcpy(&ddb_entry->iscsi_name[0], &fw_ddb_entry->iscsi_name[0],
             min(sizeof(ddb_entry->iscsi_name),
               sizeof(fw_ddb_entry->iscsi_name)));
      memcpy(&ddb_entry->ip_addr[0], &fw_ddb_entry->ip_addr[0],
             min(sizeof(ddb_entry->ip_addr), sizeof(fw_ddb_entry->ip_addr)));

      DEBUG2(printk("scsi%ld: %s: ddb[%d] - State= %x status= %d.\n",
                  ha->host_no, __func__, fw_ddb_index,
                  ddb_entry->fw_ddb_device_state, status));

 exit_update_ddb:
      if (fw_ddb_entry)
            dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
                          fw_ddb_entry, fw_ddb_entry_dma);

      return status;
}

/**
 * qla4xxx_alloc_ddb - allocate device database entry
 * @ha: Pointer to host adapter structure.
 * @fw_ddb_index: Firmware's device database index
 *
 * This routine allocates a ddb_entry, ititializes some values, and
 * inserts it into the ddb list.
 **/
static struct ddb_entry * qla4xxx_alloc_ddb(struct scsi_qla_host *ha,
                                  uint32_t fw_ddb_index)
{
      struct ddb_entry *ddb_entry;

      DEBUG2(printk("scsi%ld: %s: fw_ddb_index [%d]\n", ha->host_no,
                  __func__, fw_ddb_index));

      ddb_entry = qla4xxx_alloc_sess(ha);
      if (ddb_entry == NULL) {
            DEBUG2(printk("scsi%ld: %s: Unable to allocate memory "
                        "to add fw_ddb_index [%d]\n",
                        ha->host_no, __func__, fw_ddb_index));
            return ddb_entry;
      }

      ddb_entry->fw_ddb_index = fw_ddb_index;
      atomic_set(&ddb_entry->port_down_timer, ha->port_down_retry_count);
      atomic_set(&ddb_entry->retry_relogin_timer, INVALID_ENTRY);
      atomic_set(&ddb_entry->relogin_timer, 0);
      atomic_set(&ddb_entry->relogin_retry_count, 0);
      atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
      list_add_tail(&ddb_entry->list, &ha->ddb_list);
      ha->fw_ddb_index_map[fw_ddb_index] = ddb_entry;
      ha->tot_ddbs++;

      return ddb_entry;
}

/**
 * qla4xxx_configure_ddbs - builds driver ddb list
 * @ha: Pointer to host adapter structure.
 *
 * This routine searches for all valid firmware ddb entries and builds
 * an internal ddb list. Ddbs that are considered valid are those with
 * a device state of SESSION_ACTIVE.
 **/
static int qla4xxx_build_ddb_list(struct scsi_qla_host *ha)
{
      int status = QLA_SUCCESS;
      uint32_t fw_ddb_index = 0;
      uint32_t next_fw_ddb_index = 0;
      uint32_t ddb_state;
      uint32_t conn_err, err_code;
      struct ddb_entry *ddb_entry;
      uint32_t new_tgt;

      dev_info(&ha->pdev->dev, "Initializing DDBs ...\n");
      for (fw_ddb_index = 0; fw_ddb_index < MAX_DDB_ENTRIES;
           fw_ddb_index = next_fw_ddb_index) {
            /* First, let's see if a device exists here */
            if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, NULL, 0, NULL,
                                  &next_fw_ddb_index, &ddb_state,
                                  &conn_err, NULL, NULL) ==
                QLA_ERROR) {
                  DEBUG2(printk("scsi%ld: %s: get_ddb_entry, "
                              "fw_ddb_index %d failed", ha->host_no,
                              __func__, fw_ddb_index));
                  return QLA_ERROR;
            }

            DEBUG2(printk("scsi%ld: %s: Getting DDB[%d] ddbstate=0x%x, "
                        "next_fw_ddb_index=%d.\n", ha->host_no, __func__,
                        fw_ddb_index, ddb_state, next_fw_ddb_index));

            /* Issue relogin, if necessary. */
            if (ddb_state == DDB_DS_SESSION_FAILED ||
                ddb_state == DDB_DS_NO_CONNECTION_ACTIVE) {
                  /* Try and login to device */
                  DEBUG2(printk("scsi%ld: %s: Login to DDB[%d]\n",
                              ha->host_no, __func__, fw_ddb_index));
                  err_code = ((conn_err & 0x00ff0000) >> 16);
                  if (err_code == 0x1c || err_code == 0x06) {
                        DEBUG2(printk("scsi%ld: %s send target "
                                    "completed "
                                    "or access denied failure\n",
                                    ha->host_no, __func__));
                  } else {
                        qla4xxx_set_ddb_entry(ha, fw_ddb_index, 0);
                        if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index,
                              NULL, 0, NULL, &next_fw_ddb_index,
                              &ddb_state, &conn_err, NULL, NULL)
                              == QLA_ERROR) {
                              DEBUG2(printk("scsi%ld: %s:"
                                    "get_ddb_entry %d failed\n",
                                    ha->host_no,
                                    __func__, fw_ddb_index));
                              return QLA_ERROR;
                        }
                  }
            }

            if (ddb_state != DDB_DS_SESSION_ACTIVE)
                  goto next_one;
            /*
             * if fw_ddb with session active state found,
             * add to ddb_list
             */
            DEBUG2(printk("scsi%ld: %s: DDB[%d] added to list\n",
                        ha->host_no, __func__, fw_ddb_index));

            /* Add DDB to internal our ddb list. */
            ddb_entry = qla4xxx_get_ddb_entry(ha, fw_ddb_index, &new_tgt);
            if (ddb_entry == NULL) {
                  DEBUG2(printk("scsi%ld: %s: Unable to allocate memory "
                              "for device at fw_ddb_index %d\n",
                              ha->host_no, __func__, fw_ddb_index));
                  return QLA_ERROR;
            }
            /* Fill in the device structure */
            if (qla4xxx_update_ddb_entry(ha, ddb_entry, fw_ddb_index) ==
                QLA_ERROR) {
                  ha->fw_ddb_index_map[fw_ddb_index] =
                        (struct ddb_entry *)INVALID_ENTRY;


                  DEBUG2(printk("scsi%ld: %s: update_ddb_entry failed "
                              "for fw_ddb_index %d.\n",
                              ha->host_no, __func__, fw_ddb_index));
                  return QLA_ERROR;
            }

next_one:
            /* We know we've reached the last device when
             * next_fw_ddb_index is 0 */
            if (next_fw_ddb_index == 0)
                  break;
      }

      dev_info(&ha->pdev->dev, "DDB list done..\n");

      return status;
}

struct qla4_relog_scan {
      int halt_wait;
      uint32_t conn_err;
      uint32_t err_code;
      uint32_t fw_ddb_index;
      uint32_t next_fw_ddb_index;
      uint32_t fw_ddb_device_state;
};

static int qla4_test_rdy(struct scsi_qla_host *ha, struct qla4_relog_scan *rs)
{
      struct ddb_entry *ddb_entry;

      /*
       * Don't want to do a relogin if connection
       * error is 0x1c.
       */
      rs->err_code = ((rs->conn_err & 0x00ff0000) >> 16);
      if (rs->err_code == 0x1c || rs->err_code == 0x06) {
            DEBUG2(printk(
                         "scsi%ld: %s send target"
                         " completed or "
                         "access denied failure\n",
                         ha->host_no, __func__));
      } else {
            /* We either have a device that is in
             * the process of relogging in or a
             * device that is waiting to be
             * relogged in */
            rs->halt_wait = 0;

            ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha,
                                             rs->fw_ddb_index);
            if (ddb_entry == NULL)
                  return QLA_ERROR;

            if (ddb_entry->dev_scan_wait_to_start_relogin != 0
                && time_after_eq(jiffies,
                             ddb_entry->
                             dev_scan_wait_to_start_relogin))
            {
                  ddb_entry->dev_scan_wait_to_start_relogin = 0;
                  qla4xxx_set_ddb_entry(ha, rs->fw_ddb_index, 0);
            }
      }
      return QLA_SUCCESS;
}

static int qla4_scan_for_relogin(struct scsi_qla_host *ha,
                         struct qla4_relog_scan *rs)
{
      int error;

      /* scan for relogins
       * ----------------- */
      for (rs->fw_ddb_index = 0; rs->fw_ddb_index < MAX_DDB_ENTRIES;
           rs->fw_ddb_index = rs->next_fw_ddb_index) {
            if (qla4xxx_get_fwddb_entry(ha, rs->fw_ddb_index, NULL, 0,
                                  NULL, &rs->next_fw_ddb_index,
                                  &rs->fw_ddb_device_state,
                                  &rs->conn_err, NULL, NULL)
                == QLA_ERROR)
                  return QLA_ERROR;

            if (rs->fw_ddb_device_state == DDB_DS_LOGIN_IN_PROCESS)
                  rs->halt_wait = 0;

            if (rs->fw_ddb_device_state == DDB_DS_SESSION_FAILED ||
                rs->fw_ddb_device_state == DDB_DS_NO_CONNECTION_ACTIVE) {
                  error = qla4_test_rdy(ha, rs);
                  if (error)
                        return error;
            }

            /* We know we've reached the last device when
             * next_fw_ddb_index is 0 */
            if (rs->next_fw_ddb_index == 0)
                  break;
      }
      return QLA_SUCCESS;
}

/**
 * qla4xxx_devices_ready - wait for target devices to be logged in
 * @ha: pointer to adapter structure
 *
 * This routine waits up to ql4xdiscoverywait seconds
 * F/W database during driver load time.
 **/
static int qla4xxx_devices_ready(struct scsi_qla_host *ha)
{
      int error;
      unsigned long discovery_wtime;
      struct qla4_relog_scan rs;

      discovery_wtime = jiffies + (ql4xdiscoverywait * HZ);

      DEBUG(printk("Waiting (%d) for devices ...\n", ql4xdiscoverywait));
      do {
            /* poll for AEN. */
            qla4xxx_get_firmware_state(ha);
            if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags)) {
                  /* Set time-between-relogin timer */
                  qla4xxx_process_aen(ha, RELOGIN_DDB_CHANGED_AENS);
            }

            /* if no relogins active or needed, halt discvery wait */
            rs.halt_wait = 1;

            error = qla4_scan_for_relogin(ha, &rs);

            if (rs.halt_wait) {
                  DEBUG2(printk("scsi%ld: %s: Delay halted.  Devices "
                              "Ready.\n", ha->host_no, __func__));
                  return QLA_SUCCESS;
            }

            msleep(2000);
      } while (!time_after_eq(jiffies, discovery_wtime));

      DEBUG3(qla4xxx_get_conn_event_log(ha));

      return QLA_SUCCESS;
}

static void qla4xxx_flush_AENS(struct scsi_qla_host *ha)
{
      unsigned long wtime;

      /* Flush the 0x8014 AEN from the firmware as a result of
       * Auto connect. We are basically doing get_firmware_ddb()
       * to determine whether we need to log back in or not.
       *  Trying to do a set ddb before we have processed 0x8014
       *  will result in another set_ddb() for the same ddb. In other
       *  words there will be stale entries in the aen_q.
       */
      wtime = jiffies + (2 * HZ);
      do {
            if (qla4xxx_get_firmware_state(ha) == QLA_SUCCESS)
                  if (ha->firmware_state & (BIT_2 | BIT_0))
                        return;

            if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
                  qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);

            msleep(1000);
      } while (!time_after_eq(jiffies, wtime));

}

static int qla4xxx_initialize_ddb_list(struct scsi_qla_host *ha)
{
      uint16_t fw_ddb_index;
      int status = QLA_SUCCESS;

      /* free the ddb list if is not empty */
      if (!list_empty(&ha->ddb_list))
            qla4xxx_free_ddb_list(ha);

      for (fw_ddb_index = 0; fw_ddb_index < MAX_DDB_ENTRIES; fw_ddb_index++)
            ha->fw_ddb_index_map[fw_ddb_index] =
                  (struct ddb_entry *)INVALID_ENTRY;

      ha->tot_ddbs = 0;

      qla4xxx_flush_AENS(ha);

      /*
       * First perform device discovery for active
       * fw ddb indexes and build
       * ddb list.
       */
      if ((status = qla4xxx_build_ddb_list(ha)) == QLA_ERROR)
            return status;

      /* Wait for an AEN */
      qla4xxx_devices_ready(ha);

      /*
       * Targets can come online after the inital discovery, so processing
       * the aens here will catch them.
       */
      if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
            qla4xxx_process_aen(ha, PROCESS_ALL_AENS);

      return status;
}

/**
 * qla4xxx_update_ddb_list - update the driver ddb list
 * @ha: pointer to host adapter structure.
 *
 * This routine obtains device information from the F/W database after
 * firmware or adapter resets.  The device table is preserved.
 **/
int qla4xxx_reinitialize_ddb_list(struct scsi_qla_host *ha)
{
      int status = QLA_SUCCESS;
      struct ddb_entry *ddb_entry, *detemp;

      /* Update the device information for all devices. */
      list_for_each_entry_safe(ddb_entry, detemp, &ha->ddb_list, list) {
            qla4xxx_update_ddb_entry(ha, ddb_entry,
                               ddb_entry->fw_ddb_index);
            if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) {
                  atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
                  DEBUG2(printk ("scsi%ld: %s: ddb index [%d] marked "
                               "ONLINE\n", ha->host_no, __func__,
                               ddb_entry->fw_ddb_index));
            } else if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
                  qla4xxx_mark_device_missing(ha, ddb_entry);
      }
      return status;
}

/**
 * qla4xxx_relogin_device - re-establish session
 * @ha: Pointer to host adapter structure.
 * @ddb_entry: Pointer to device database entry
 *
 * This routine does a session relogin with the specified device.
 * The ddb entry must be assigned prior to making this call.
 **/
int qla4xxx_relogin_device(struct scsi_qla_host *ha,
                     struct ddb_entry * ddb_entry)
{
      uint16_t relogin_timer;

      relogin_timer = max(ddb_entry->default_relogin_timeout,
                      (uint16_t)RELOGIN_TOV);
      atomic_set(&ddb_entry->relogin_timer, relogin_timer);

      DEBUG2(printk("scsi%ld: Relogin index [%d]. TOV=%d\n", ha->host_no,
                  ddb_entry->fw_ddb_index, relogin_timer));

      qla4xxx_set_ddb_entry(ha, ddb_entry->fw_ddb_index, 0);

      return QLA_SUCCESS;
}

static int qla4xxx_config_nvram(struct scsi_qla_host *ha)
{
      unsigned long flags;
      union external_hw_config_reg extHwConfig;

      DEBUG2(printk("scsi%ld: %s: Get EEProm parameters \n", ha->host_no,
                  __func__));
      if (ql4xxx_lock_flash(ha) != QLA_SUCCESS)
            return (QLA_ERROR);
      if (ql4xxx_lock_nvram(ha) != QLA_SUCCESS) {
            ql4xxx_unlock_flash(ha);
            return (QLA_ERROR);
      }

      /* Get EEPRom Parameters from NVRAM and validate */
      dev_info(&ha->pdev->dev, "Configuring NVRAM ...\n");
      if (qla4xxx_is_nvram_configuration_valid(ha) == QLA_SUCCESS) {
            spin_lock_irqsave(&ha->hardware_lock, flags);
            extHwConfig.Asuint32_t =
                  rd_nvram_word(ha, eeprom_ext_hw_conf_offset(ha));
            spin_unlock_irqrestore(&ha->hardware_lock, flags);
      } else {
            /*
             * QLogic adapters should always have a valid NVRAM.
             * If not valid, do not load.
             */
            dev_warn(&ha->pdev->dev,
                     "scsi%ld: %s: EEProm checksum invalid.  "
                     "Please update your EEPROM\n", ha->host_no,
                     __func__);

            /* set defaults */
            if (is_qla4010(ha))
                  extHwConfig.Asuint32_t = 0x1912;
            else if (is_qla4022(ha) | is_qla4032(ha))
                  extHwConfig.Asuint32_t = 0x0023;
      }
      DEBUG(printk("scsi%ld: %s: Setting extHwConfig to 0xFFFF%04x\n",
                 ha->host_no, __func__, extHwConfig.Asuint32_t));

      spin_lock_irqsave(&ha->hardware_lock, flags);
      writel((0xFFFF << 16) | extHwConfig.Asuint32_t, isp_ext_hw_conf(ha));
      readl(isp_ext_hw_conf(ha));
      spin_unlock_irqrestore(&ha->hardware_lock, flags);

      ql4xxx_unlock_nvram(ha);
      ql4xxx_unlock_flash(ha);

      return (QLA_SUCCESS);
}

static void qla4x00_pci_config(struct scsi_qla_host *ha)
{
      uint16_t w;
      int status;

      dev_info(&ha->pdev->dev, "Configuring PCI space...\n");

      pci_set_master(ha->pdev);
      status = pci_set_mwi(ha->pdev);
      /*
       * We want to respect framework's setting of PCI configuration space
       * command register and also want to make sure that all bits of
       * interest to us are properly set in command register.
       */
      pci_read_config_word(ha->pdev, PCI_COMMAND, &w);
      w |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
      w &= ~PCI_COMMAND_INTX_DISABLE;
      pci_write_config_word(ha->pdev, PCI_COMMAND, w);
}

static int qla4xxx_start_firmware_from_flash(struct scsi_qla_host *ha)
{
      int status = QLA_ERROR;
      uint32_t max_wait_time;
      unsigned long flags;
      uint32_t mbox_status;

      dev_info(&ha->pdev->dev, "Starting firmware ...\n");

      /*
       * Start firmware from flash ROM
       *
       * WORKAROUND: Stuff a non-constant value that the firmware can
       * use as a seed for a random number generator in MB7 prior to
       * setting BOOT_ENABLE.  Fixes problem where the TCP
       * connections use the same TCP ports after each reboot,
       * causing some connections to not get re-established.
       */
      DEBUG(printk("scsi%d: %s: Start firmware from flash ROM\n",
                 ha->host_no, __func__));

      spin_lock_irqsave(&ha->hardware_lock, flags);
      writel(jiffies, &ha->reg->mailbox[7]);
      if (is_qla4022(ha) | is_qla4032(ha))
            writel(set_rmask(NVR_WRITE_ENABLE),
                   &ha->reg->u1.isp4022.nvram);

        writel(2, &ha->reg->mailbox[6]);
        readl(&ha->reg->mailbox[6]);

      writel(set_rmask(CSR_BOOT_ENABLE), &ha->reg->ctrl_status);
      readl(&ha->reg->ctrl_status);
      spin_unlock_irqrestore(&ha->hardware_lock, flags);

      /* Wait for firmware to come UP. */
      max_wait_time = FIRMWARE_UP_TOV * 4;
      do {
            uint32_t ctrl_status;

            spin_lock_irqsave(&ha->hardware_lock, flags);
            ctrl_status = readw(&ha->reg->ctrl_status);
            mbox_status = readw(&ha->reg->mailbox[0]);
            spin_unlock_irqrestore(&ha->hardware_lock, flags);

            if (ctrl_status & set_rmask(CSR_SCSI_PROCESSOR_INTR))
                  break;
            if (mbox_status == MBOX_STS_COMMAND_COMPLETE)
                  break;

            DEBUG2(printk("scsi%ld: %s: Waiting for boot firmware to "
                        "complete... ctrl_sts=0x%x, remaining=%d\n",
                        ha->host_no, __func__, ctrl_status,
                        max_wait_time));

            msleep(250);
      } while ((max_wait_time--));

      if (mbox_status == MBOX_STS_COMMAND_COMPLETE) {
            DEBUG(printk("scsi%ld: %s: Firmware has started\n",
                       ha->host_no, __func__));

            spin_lock_irqsave(&ha->hardware_lock, flags);
            writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
                   &ha->reg->ctrl_status);
            readl(&ha->reg->ctrl_status);
            spin_unlock_irqrestore(&ha->hardware_lock, flags);

            status = QLA_SUCCESS;
      } else {
            printk(KERN_INFO "scsi%ld: %s: Boot firmware failed "
                   "-  mbox status 0x%x\n", ha->host_no, __func__,
                   mbox_status);
            status = QLA_ERROR;
      }
      return status;
}

int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a)
{
#define QL4_LOCK_DRVR_WAIT    60
#define QL4_LOCK_DRVR_SLEEP   1

      int drvr_wait = QL4_LOCK_DRVR_WAIT;
      while (drvr_wait) {
            if (ql4xxx_lock_drvr(a) == 0) {
                  ssleep(QL4_LOCK_DRVR_SLEEP);
                  if (drvr_wait) {
                        DEBUG2(printk("scsi%ld: %s: Waiting for "
                                    "Global Init Semaphore(%d)...\n",
                                    a->host_no,
                                    __func__, drvr_wait));
                  }
                  drvr_wait -= QL4_LOCK_DRVR_SLEEP;
            } else {
                  DEBUG2(printk("scsi%ld: %s: Global Init Semaphore "
                              "acquired\n", a->host_no, __func__));
                  return QLA_SUCCESS;
            }
      }
      return QLA_ERROR;
}

/**
 * qla4xxx_start_firmware - starts qla4xxx firmware
 * @ha: Pointer to host adapter structure.
 *
 * This routine performs the necessary steps to start the firmware for
 * the QLA4010 adapter.
 **/
static int qla4xxx_start_firmware(struct scsi_qla_host *ha)
{
      unsigned long flags = 0;
      uint32_t mbox_status;
      int status = QLA_ERROR;
      int soft_reset = 1;
      int config_chip = 0;

      if (is_qla4022(ha) | is_qla4032(ha))
            ql4xxx_set_mac_number(ha);

      if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
            return QLA_ERROR;

      spin_lock_irqsave(&ha->hardware_lock, flags);

      DEBUG2(printk("scsi%ld: %s: port_ctrl     = 0x%08X\n", ha->host_no,
                  __func__, readw(isp_port_ctrl(ha))));
      DEBUG(printk("scsi%ld: %s: port_status = 0x%08X\n", ha->host_no,
                 __func__, readw(isp_port_status(ha))));

      /* Is Hardware already initialized? */
      if ((readw(isp_port_ctrl(ha)) & 0x8000) != 0) {
            DEBUG(printk("scsi%ld: %s: Hardware has already been "
                       "initialized\n", ha->host_no, __func__));

            /* Receive firmware boot acknowledgement */
            mbox_status = readw(&ha->reg->mailbox[0]);

            DEBUG2(printk("scsi%ld: %s: H/W Config complete - mbox[0]= "
                        "0x%x\n", ha->host_no, __func__, mbox_status));

            /* Is firmware already booted? */
            if (mbox_status == 0) {
                  /* F/W not running, must be config by net driver */
                  config_chip = 1;
                  soft_reset = 0;
            } else {
                  writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
                         &ha->reg->ctrl_status);
                  readl(&ha->reg->ctrl_status);
                  spin_unlock_irqrestore(&ha->hardware_lock, flags);
                  if (qla4xxx_get_firmware_state(ha) == QLA_SUCCESS) {
                        DEBUG2(printk("scsi%ld: %s: Get firmware "
                                    "state -- state = 0x%x\n",
                                    ha->host_no,
                                    __func__, ha->firmware_state));
                        /* F/W is running */
                        if (ha->firmware_state &
                            FW_STATE_CONFIG_WAIT) {
                              DEBUG2(printk("scsi%ld: %s: Firmware "
                                          "in known state -- "
                                          "config and "
                                          "boot, state = 0x%x\n",
                                          ha->host_no, __func__,
                                          ha->firmware_state));
                              config_chip = 1;
                              soft_reset = 0;
                        }
                  } else {
                        DEBUG2(printk("scsi%ld: %s: Firmware in "
                                    "unknown state -- resetting,"
                                    " state = "
                                    "0x%x\n", ha->host_no, __func__,
                                    ha->firmware_state));
                  }
                  spin_lock_irqsave(&ha->hardware_lock, flags);
            }
      } else {
            DEBUG(printk("scsi%ld: %s: H/W initialization hasn't been "
                       "started - resetting\n", ha->host_no, __func__));
      }
      spin_unlock_irqrestore(&ha->hardware_lock, flags);

      DEBUG(printk("scsi%ld: %s: Flags soft_rest=%d, config= %d\n ",
                 ha->host_no, __func__, soft_reset, config_chip));
      if (soft_reset) {
            DEBUG(printk("scsi%ld: %s: Issue Soft Reset\n", ha->host_no,
                       __func__));
            status = qla4xxx_soft_reset(ha);
            if (status == QLA_ERROR) {
                  DEBUG(printk("scsi%d: %s: Soft Reset failed!\n",
                             ha->host_no, __func__));
                  ql4xxx_unlock_drvr(ha);
                  return QLA_ERROR;
            }
            config_chip = 1;

            /* Reset clears the semaphore, so aquire again */
            if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
                  return QLA_ERROR;
      }

      if (config_chip) {
            if ((status = qla4xxx_config_nvram(ha)) == QLA_SUCCESS)
                  status = qla4xxx_start_firmware_from_flash(ha);
      }

      ql4xxx_unlock_drvr(ha);
      if (status == QLA_SUCCESS) {
            qla4xxx_get_fw_version(ha);
            if (test_and_clear_bit(AF_GET_CRASH_RECORD, &ha->flags))
                  qla4xxx_get_crash_record(ha);
      } else {
            DEBUG(printk("scsi%ld: %s: Firmware has NOT started\n",
                       ha->host_no, __func__));
      }
      return status;
}


/**
 * qla4xxx_initialize_adapter - initiailizes hba
 * @ha: Pointer to host adapter structure.
 * @renew_ddb_list: Indicates what to do with the adapter's ddb list
 *    after adapter recovery has completed.
 *    0=preserve ddb list, 1=destroy and rebuild ddb list
 *
 * This routine parforms all of the steps necessary to initialize the adapter.
 *
 **/
int qla4xxx_initialize_adapter(struct scsi_qla_host *ha,
                         uint8_t renew_ddb_list)
{
      int status = QLA_ERROR;
      int8_t ip_address[IP_ADDR_LEN] = {0} ;

      ha->eeprom_cmd_data = 0;

      qla4x00_pci_config(ha);

      qla4xxx_disable_intrs(ha);

      /* Initialize the Host adapter request/response queues and firmware */
      if (qla4xxx_start_firmware(ha) == QLA_ERROR)
            goto exit_init_hba;

      if (qla4xxx_validate_mac_address(ha) == QLA_ERROR)
            goto exit_init_hba;

      if (qla4xxx_init_local_data(ha) == QLA_ERROR)
            goto exit_init_hba;

      status = qla4xxx_init_firmware(ha);
      if (status == QLA_ERROR)
            goto exit_init_hba;

      /*
       * FW is waiting to get an IP address from DHCP server: Skip building
       * the ddb_list and wait for DHCP lease acquired aen to come in
       * followed by 0x8014 aen" to trigger the tgt discovery process.
       */
      if (ha->firmware_state & FW_STATE_DHCP_IN_PROGRESS)
            goto exit_init_online;

      /* Skip device discovery if ip and subnet is zero */
      if (memcmp(ha->ip_address, ip_address, IP_ADDR_LEN) == 0 ||
          memcmp(ha->subnet_mask, ip_address, IP_ADDR_LEN) == 0)
            goto exit_init_online;

      if (renew_ddb_list == PRESERVE_DDB_LIST) {
            /*
             * We want to preserve lun states (i.e. suspended, etc.)
             * for recovery initiated by the driver.  So just update
             * the device states for the existing ddb_list.
             */
            qla4xxx_reinitialize_ddb_list(ha);
      } else if (renew_ddb_list == REBUILD_DDB_LIST) {
            /*
             * We want to build the ddb_list from scratch during
             * driver initialization and recovery initiated by the
             * INT_HBA_RESET IOCTL.
             */
            status = qla4xxx_initialize_ddb_list(ha);
            if (status == QLA_ERROR) {
                  DEBUG2(printk("%s(%ld) Error occurred during build"
                              "ddb list\n", __func__, ha->host_no));
                  goto exit_init_hba;
            }

      }
      if (!ha->tot_ddbs) {
            DEBUG2(printk("scsi%ld: Failed to initialize devices or none "
                        "present in Firmware device database\n",
                        ha->host_no));
      }

exit_init_online:
      set_bit(AF_ONLINE, &ha->flags);
exit_init_hba:
      return status;
}

/**
 * qla4xxx_add_device_dynamically - ddb addition due to an AEN
 * @ha:  Pointer to host adapter structure.
 * @fw_ddb_index:  Firmware's device database index
 *
 * This routine processes adds a device as a result of an 8014h AEN.
 **/
static void qla4xxx_add_device_dynamically(struct scsi_qla_host *ha,
                                 uint32_t fw_ddb_index)
{
      struct ddb_entry * ddb_entry;
      uint32_t new_tgt;

      /* First allocate a device structure */
      ddb_entry = qla4xxx_get_ddb_entry(ha, fw_ddb_index, &new_tgt);
      if (ddb_entry == NULL) {
            DEBUG2(printk(KERN_WARNING
                        "scsi%ld: Unable to allocate memory to add "
                        "fw_ddb_index %d\n", ha->host_no, fw_ddb_index));
            return;
      }

      if (!new_tgt && (ddb_entry->fw_ddb_index != fw_ddb_index)) {
            /* Target has been bound to a new fw_ddb_index */
            qla4xxx_free_ddb(ha, ddb_entry);
            ddb_entry = qla4xxx_alloc_ddb(ha, fw_ddb_index);
            if (ddb_entry == NULL) {
                  DEBUG2(printk(KERN_WARNING
                        "scsi%ld: Unable to allocate memory"
                        " to add fw_ddb_index %d\n",
                        ha->host_no, fw_ddb_index));
                  return;
            }
      }
      if (qla4xxx_update_ddb_entry(ha, ddb_entry, fw_ddb_index) ==
                            QLA_ERROR) {
            ha->fw_ddb_index_map[fw_ddb_index] =
                              (struct ddb_entry *)INVALID_ENTRY;
            DEBUG2(printk(KERN_WARNING
                        "scsi%ld: failed to add new device at index "
                        "[%d]\n Unable to retrieve fw ddb entry\n",
                        ha->host_no, fw_ddb_index));
            qla4xxx_free_ddb(ha, ddb_entry);
            return;
      }

      if (qla4xxx_add_sess(ddb_entry)) {
            DEBUG2(printk(KERN_WARNING
                        "scsi%ld: failed to add new device at index "
                        "[%d]\n Unable to add connection and session\n",
                        ha->host_no, fw_ddb_index));
            qla4xxx_free_ddb(ha, ddb_entry);
      }
}

/**
 * qla4xxx_process_ddb_changed - process ddb state change
 * @ha - Pointer to host adapter structure.
 * @fw_ddb_index - Firmware's device database index
 * @state - Device state
 *
 * This routine processes a Decive Database Changed AEN Event.
 **/
int qla4xxx_process_ddb_changed(struct scsi_qla_host *ha,
                        uint32_t fw_ddb_index, uint32_t state)
{
      struct ddb_entry * ddb_entry;
      uint32_t old_fw_ddb_device_state;

      /* check for out of range index */
      if (fw_ddb_index >= MAX_DDB_ENTRIES)
            return QLA_ERROR;

      /* Get the corresponging ddb entry */
      ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, fw_ddb_index);
      /* Device does not currently exist in our database. */
      if (ddb_entry == NULL) {
            if (state == DDB_DS_SESSION_ACTIVE)
                  qla4xxx_add_device_dynamically(ha, fw_ddb_index);
            return QLA_SUCCESS;
      }

      /* Device already exists in our database. */
      old_fw_ddb_device_state = ddb_entry->fw_ddb_device_state;
      DEBUG2(printk("scsi%ld: %s DDB - old state= 0x%x, new state=0x%x for "
                  "index [%d]\n", ha->host_no, __func__,
                  ddb_entry->fw_ddb_device_state, state, fw_ddb_index));
      if (old_fw_ddb_device_state == state &&
          state == DDB_DS_SESSION_ACTIVE) {
            /* Do nothing, state not changed. */
            return QLA_SUCCESS;
      }

      ddb_entry->fw_ddb_device_state = state;
      /* Device is back online. */
      if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) {
            atomic_set(&ddb_entry->port_down_timer,
                     ha->port_down_retry_count);
            atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
            atomic_set(&ddb_entry->relogin_retry_count, 0);
            atomic_set(&ddb_entry->relogin_timer, 0);
            clear_bit(DF_RELOGIN, &ddb_entry->flags);
            clear_bit(DF_NO_RELOGIN, &ddb_entry->flags);
            iscsi_if_create_session_done(ddb_entry->conn);
            /*
             * Change the lun state to READY in case the lun TIMEOUT before
             * the device came back.
             */
      } else {
            /* Device went away, try to relogin. */
            /* Mark device missing */
            if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
                  qla4xxx_mark_device_missing(ha, ddb_entry);
            /*
             * Relogin if device state changed to a not active state.
             * However, do not relogin if this aen is a result of an IOCTL
             * logout (DF_NO_RELOGIN) or if this is a discovered device.
             */
            if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_FAILED &&
                !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
                !test_bit(DF_NO_RELOGIN, &ddb_entry->flags) &&
                !test_bit(DF_ISNS_DISCOVERED, &ddb_entry->flags)) {
                  /*
                   * This triggers a relogin.  After the relogin_timer
                   * expires, the relogin gets scheduled.    We must wait a
                   * minimum amount of time since receiving an 0x8014 AEN
                   * with failed device_state or a logout response before
                   * we can issue another relogin.
                   */
                  /* Firmware padds this timeout: (time2wait +1).
                   * Driver retry to login should be longer than F/W.
                   * Otherwise F/W will fail
                   * set_ddb() mbx cmd with 0x4005 since it still
                   * counting down its time2wait.
                   */
                  atomic_set(&ddb_entry->relogin_timer, 0);
                  atomic_set(&ddb_entry->retry_relogin_timer,
                           ddb_entry->default_time2wait + 4);
            }
      }

      return QLA_SUCCESS;
}


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