[SCSI] Initial Commit of qla4xxx

open-iSCSI driver for Qlogic Corporation's iSCSI HBAs

Signed-off-by: Ravi Anand <ravi.anand@qlogic.com>
Signed-off-by: David Somayajulu <david.somayajulu@qlogic.com>
Signed-off-by: Doug Maxey <dwm@bubba.enoyolf.org>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 1340 insertions, 0 deletions

diff --git a/drivers/scsi/qla4xxx/ql4_init.c b/drivers/scsi/qla4xxx/ql4_init.c
new file mode 100644
index 000000000000..bb3a1c11f44c
--- /dev/null
+++ b/drivers/scsi/qla4xxx/ql4_init.c
@@ -0,0 +1,1340 @@
+/*
+ * QLogic iSCSI HBA Driver
+ * Copyright (c)  2003-2006 QLogic Corporation
+ *
+ * See LICENSE.qla4xxx for copyright and licensing details.
+ */
+
+#include "ql4_def.h"
+
+/*
+ * QLogic ISP4xxx Hardware Support Function Prototypes.
+ */
+
+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
+ **/
+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));
+                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;
+
+        set_bit(AF_ONLINE, &ha->flags);
+        return qla4xxx_get_firmware_status(ha);
+}
+
+static struct ddb_entry* qla4xxx_get_ddb_entry(struct scsi_qla_host *ha,
+                                               uint32_t fw_ddb_index)
+{
+        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;
+
+        /* 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->iscsiName,
+                           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));
+                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
+ *
+ **/
+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->taskMngmntTimeout);
+        ddb_entry->CmdSn = 0;
+        ddb_entry->exe_throttle = le16_to_cpu(fw_ddb_entry->exeThrottle);
+        ddb_entry->default_relogin_timeout =
+                le16_to_cpu(fw_ddb_entry->taskMngmntTimeout);
+        ddb_entry->default_time2wait = le16_to_cpu(fw_ddb_entry->minTime2Wait);
+
+        /* 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->portNumber);
+        ddb_entry->tpgt = le32_to_cpu(fw_ddb_entry->TargetPortalGroup);
+        memcpy(&ddb_entry->iscsi_name[0], &fw_ddb_entry->iscsiName[0],
+               min(sizeof(ddb_entry->iscsi_name),
+                   sizeof(fw_ddb_entry->iscsiName)));
+        memcpy(&ddb_entry->ip_addr[0], &fw_ddb_entry->ipAddr[0],
+               min(sizeof(ddb_entry->ip_addr), sizeof(fw_ddb_entry->ipAddr)));
+
+        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.
+ **/
+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;
+
+        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 (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);
+                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;
+}
+
+/**
+ * qla4010_get_topcat_presence - check if it is QLA4040 TopCat Chip
+ * @ha: Pointer to host adapter structure.
+ *
+ **/
+static int qla4010_get_topcat_presence(struct scsi_qla_host *ha)
+{
+        unsigned long flags;
+        uint16_t topcat;
+
+        if (ql4xxx_lock_nvram(ha) != QLA_SUCCESS)
+                return QLA_ERROR;
+        spin_lock_irqsave(&ha->hardware_lock, flags);
+        topcat = rd_nvram_word(ha, offsetof(struct eeprom_data,
+                                            isp4010.topcat));
+        spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+        if ((topcat & TOPCAT_MASK) == TOPCAT_PRESENT)
+                set_bit(AF_TOPCAT_CHIP_PRESENT, &ha->flags);
+        else
+                clear_bit(AF_TOPCAT_CHIP_PRESENT, &ha->flags);
+        ql4xxx_unlock_nvram(ha);
+        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))
+                        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, mwi;
+
+        dev_info(&ha->pdev->dev, "Configuring PCI space...\n");
+
+        pci_set_master(ha->pdev);
+        mwi = 0;
+        if (pci_set_mwi(ha->pdev))
+                mwi = PCI_COMMAND_INVALIDATE;
+        /*
+         * 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 |= mwi | (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))
+                writel(set_rmask(NVR_WRITE_ENABLE),
+                       &ha->reg->u1.isp4022.nvram);
+
+        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;
+}
+
+static int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a)
+{
+#define QL4_LOCK_DRVR_WAIT      300
+#define QL4_LOCK_DRVR_SLEEP     100
+
+        int drvr_wait = QL4_LOCK_DRVR_WAIT;
+        while (drvr_wait) {
+                if (ql4xxx_lock_drvr(a) == 0) {
+                        msleep(QL4_LOCK_DRVR_SLEEP);
+                        if (drvr_wait) {
+                                DEBUG2(printk("scsi%ld: %s: Waiting for "
+                                              "Global Init Semaphore...n",
+                                              a->host_no,
+                                              __func__));
+                        }
+                        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 neccessary 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_qla4010(ha)){
+                if (qla4010_get_topcat_presence(ha) != QLA_SUCCESS)
+                        return QLA_ERROR;
+        }
+
+        if (is_qla4022(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)
+                return status;
+
+        if (qla4xxx_validate_mac_address(ha) == QLA_ERROR)
+                return status;
+
+        if (qla4xxx_init_local_data(ha) == QLA_ERROR)
+                return status;
+
+        status = qla4xxx_init_firmware(ha);
+        if (status == QLA_ERROR)
+                return status;
+
+        /*
+         * 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)
+                return status;
+
+        /* 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)
+                return status;
+
+        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_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;
+
+        /* First allocate a device structure */
+        ddb_entry = qla4xxx_get_ddb_entry(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;
+}
+