/*
   * QLogic iSCSI HBA Driver

   * Copyright (c)  2003-2010 QLogic Corporation

   *
   * See LICENSE.qla4xxx for copyright and licensing details.
   */
  #include <linux/moduleparam.h>

  #include <linux/slab.h>

  #include <linux/blkdev.h>
  #include <linux/iscsi_boot_sysfs.h>

  #include <linux/inet.h>

  
  #include <scsi/scsi_tcq.h>
  #include <scsi/scsicam.h>
  
  #include "ql4_def.h"

  #include "ql4_version.h"
  #include "ql4_glbl.h"
  #include "ql4_dbg.h"
  #include "ql4_inline.h"

  
  /*
   * Driver version
   */

  static char qla4xxx_version_str[40];

  
  /*
   * SRB allocation cache
   */

  static struct kmem_cache *srb_cachep;

  
  /*
   * Module parameter information and variables
   */

  int ql4xdisablesysfsboot = 1;
  module_param(ql4xdisablesysfsboot, int, S_IRUGO | S_IWUSR);
  MODULE_PARM_DESC(ql4xdisablesysfsboot,
  		"Set to disable exporting boot targets to sysfs
  "
  		" 0 - Export boot targets
  "
  		" 1 - Do not export boot targets (Default)");

  int ql4xdontresethba = 0;

  module_param(ql4xdontresethba, int, S_IRUGO | S_IWUSR);

  MODULE_PARM_DESC(ql4xdontresethba,

  		"Don't reset the HBA for driver recovery 
  "
  		" 0 - It will reset HBA (Default)
  "
  		" 1 - It will NOT reset HBA");

  int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */

  module_param(ql4xextended_error_logging, int, S_IRUGO | S_IWUSR);

  MODULE_PARM_DESC(ql4xextended_error_logging,

  		 "Option to enable extended error logging, "
  		 "Default is 0 - no logging, 1 - debug logging");

  int ql4xenablemsix = 1;
  module_param(ql4xenablemsix, int, S_IRUGO|S_IWUSR);
  MODULE_PARM_DESC(ql4xenablemsix,
  		"Set to enable MSI or MSI-X interrupt mechanism.
  "
  		" 0 = enable INTx interrupt mechanism.
  "
  		" 1 = enable MSI-X interrupt mechanism (Default).
  "
  		" 2 = enable MSI interrupt mechanism.");

  #define QL4_DEF_QDEPTH 32

  static int ql4xmaxqdepth = QL4_DEF_QDEPTH;
  module_param(ql4xmaxqdepth, int, S_IRUGO | S_IWUSR);
  MODULE_PARM_DESC(ql4xmaxqdepth,
  		"Maximum queue depth to report for target devices.
  "
  		" Default: 32.");

  static int ql4xsess_recovery_tmo = QL4_SESS_RECOVERY_TMO;
  module_param(ql4xsess_recovery_tmo, int, S_IRUGO);
  MODULE_PARM_DESC(ql4xsess_recovery_tmo,
  		"Target Session Recovery Timeout.
  "

  		" Default: 120 sec.");

  static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha);

  /*
   * SCSI host template entry points
   */

  static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);

  
  /*
   * iSCSI template entry points
   */

  static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
  				  enum iscsi_param param, char *buf);

  static int qla4xxx_host_get_param(struct Scsi_Host *shost,
  				  enum iscsi_host_param param, char *buf);

  static int qla4xxx_iface_set_param(struct Scsi_Host *shost, void *data,
  				   uint32_t len);

  static int qla4xxx_get_iface_param(struct iscsi_iface *iface,
  				   enum iscsi_param_type param_type,
  				   int param, char *buf);

  static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc);

  static struct iscsi_endpoint *qla4xxx_ep_connect(struct Scsi_Host *shost,
  						 struct sockaddr *dst_addr,
  						 int non_blocking);
  static int qla4xxx_ep_poll(struct iscsi_endpoint *ep, int timeout_ms);
  static void qla4xxx_ep_disconnect(struct iscsi_endpoint *ep);
  static int qla4xxx_get_ep_param(struct iscsi_endpoint *ep,
  				enum iscsi_param param, char *buf);
  static int qla4xxx_conn_start(struct iscsi_cls_conn *conn);
  static struct iscsi_cls_conn *
  qla4xxx_conn_create(struct iscsi_cls_session *cls_sess, uint32_t conn_idx);
  static int qla4xxx_conn_bind(struct iscsi_cls_session *cls_session,
  			     struct iscsi_cls_conn *cls_conn,
  			     uint64_t transport_fd, int is_leading);
  static void qla4xxx_conn_destroy(struct iscsi_cls_conn *conn);
  static struct iscsi_cls_session *
  qla4xxx_session_create(struct iscsi_endpoint *ep, uint16_t cmds_max,
  			uint16_t qdepth, uint32_t initial_cmdsn);
  static void qla4xxx_session_destroy(struct iscsi_cls_session *sess);
  static void qla4xxx_task_work(struct work_struct *wdata);
  static int qla4xxx_alloc_pdu(struct iscsi_task *, uint8_t);
  static int qla4xxx_task_xmit(struct iscsi_task *);
  static void qla4xxx_task_cleanup(struct iscsi_task *);
  static void qla4xxx_fail_session(struct iscsi_cls_session *cls_session);
  static void qla4xxx_conn_get_stats(struct iscsi_cls_conn *cls_conn,
  				   struct iscsi_stats *stats);

  /*
   * SCSI host template entry points
   */

  static int qla4xxx_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmd);

  static int qla4xxx_eh_abort(struct scsi_cmnd *cmd);

  static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);

  static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd);

  static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
  static int qla4xxx_slave_alloc(struct scsi_device *device);
  static int qla4xxx_slave_configure(struct scsi_device *device);
  static void qla4xxx_slave_destroy(struct scsi_device *sdev);

  static umode_t ql4_attr_is_visible(int param_type, int param);

  static int qla4xxx_host_reset(struct Scsi_Host *shost, int reset_type);

  static struct qla4_8xxx_legacy_intr_set legacy_intr[] =
      QLA82XX_LEGACY_INTR_CONFIG;

  static struct scsi_host_template qla4xxx_driver_template = {
  	.module			= THIS_MODULE,
  	.name			= DRIVER_NAME,
  	.proc_name		= DRIVER_NAME,
  	.queuecommand		= qla4xxx_queuecommand,

  	.eh_abort_handler	= qla4xxx_eh_abort,

  	.eh_device_reset_handler = qla4xxx_eh_device_reset,

  	.eh_target_reset_handler = qla4xxx_eh_target_reset,

  	.eh_host_reset_handler	= qla4xxx_eh_host_reset,

  	.eh_timed_out		= qla4xxx_eh_cmd_timed_out,

  
  	.slave_configure	= qla4xxx_slave_configure,
  	.slave_alloc		= qla4xxx_slave_alloc,
  	.slave_destroy		= qla4xxx_slave_destroy,
  
  	.this_id		= -1,
  	.cmd_per_lun		= 3,
  	.use_clustering		= ENABLE_CLUSTERING,
  	.sg_tablesize		= SG_ALL,
  
  	.max_sectors		= 0xFFFF,

  	.shost_attrs		= qla4xxx_host_attrs,

  	.host_reset		= qla4xxx_host_reset,

  	.vendor_id		= SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_QLOGIC,

  };
  
  static struct iscsi_transport qla4xxx_iscsi_transport = {
  	.owner			= THIS_MODULE,
  	.name			= DRIVER_NAME,

  	.caps			= CAP_TEXT_NEGO |
  				  CAP_DATA_PATH_OFFLOAD | CAP_HDRDGST |
  				  CAP_DATADGST | CAP_LOGIN_OFFLOAD |
  				  CAP_MULTI_R2T,

  	.attr_is_visible	= ql4_attr_is_visible,

  	.create_session         = qla4xxx_session_create,
  	.destroy_session        = qla4xxx_session_destroy,
  	.start_conn             = qla4xxx_conn_start,
  	.create_conn            = qla4xxx_conn_create,
  	.bind_conn              = qla4xxx_conn_bind,
  	.stop_conn              = iscsi_conn_stop,
  	.destroy_conn           = qla4xxx_conn_destroy,
  	.set_param              = iscsi_set_param,

  	.get_conn_param		= qla4xxx_conn_get_param,

  	.get_session_param	= iscsi_session_get_param,
  	.get_ep_param           = qla4xxx_get_ep_param,
  	.ep_connect		= qla4xxx_ep_connect,
  	.ep_poll		= qla4xxx_ep_poll,
  	.ep_disconnect		= qla4xxx_ep_disconnect,
  	.get_stats		= qla4xxx_conn_get_stats,
  	.send_pdu		= iscsi_conn_send_pdu,
  	.xmit_task		= qla4xxx_task_xmit,
  	.cleanup_task		= qla4xxx_task_cleanup,
  	.alloc_pdu		= qla4xxx_alloc_pdu,

  	.get_host_param		= qla4xxx_host_get_param,

  	.set_iface_param	= qla4xxx_iface_set_param,

  	.get_iface_param	= qla4xxx_get_iface_param,

  	.bsg_request		= qla4xxx_bsg_request,

  };
  
  static struct scsi_transport_template *qla4xxx_scsi_transport;

  static umode_t ql4_attr_is_visible(int param_type, int param)

  {
  	switch (param_type) {

  	case ISCSI_HOST_PARAM:
  		switch (param) {
  		case ISCSI_HOST_PARAM_HWADDRESS:
  		case ISCSI_HOST_PARAM_IPADDRESS:
  		case ISCSI_HOST_PARAM_INITIATOR_NAME:
  			return S_IRUGO;
  		default:
  			return 0;
  		}

  	case ISCSI_PARAM:
  		switch (param) {

  		case ISCSI_PARAM_PERSISTENT_ADDRESS:
  		case ISCSI_PARAM_PERSISTENT_PORT:

  		case ISCSI_PARAM_CONN_ADDRESS:
  		case ISCSI_PARAM_CONN_PORT:

  		case ISCSI_PARAM_TARGET_NAME:
  		case ISCSI_PARAM_TPGT:
  		case ISCSI_PARAM_TARGET_ALIAS:

  		case ISCSI_PARAM_MAX_BURST:
  		case ISCSI_PARAM_MAX_R2T:
  		case ISCSI_PARAM_FIRST_BURST:
  		case ISCSI_PARAM_MAX_RECV_DLENGTH:
  		case ISCSI_PARAM_MAX_XMIT_DLENGTH:

  		case ISCSI_PARAM_IFACE_NAME:

  			return S_IRUGO;
  		default:
  			return 0;
  		}

  	case ISCSI_NET_PARAM:
  		switch (param) {
  		case ISCSI_NET_PARAM_IPV4_ADDR:
  		case ISCSI_NET_PARAM_IPV4_SUBNET:
  		case ISCSI_NET_PARAM_IPV4_GW:
  		case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
  		case ISCSI_NET_PARAM_IFACE_ENABLE:
  		case ISCSI_NET_PARAM_IPV6_LINKLOCAL:
  		case ISCSI_NET_PARAM_IPV6_ADDR:
  		case ISCSI_NET_PARAM_IPV6_ROUTER:
  		case ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG:
  		case ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG:

  		case ISCSI_NET_PARAM_VLAN_ID:
  		case ISCSI_NET_PARAM_VLAN_PRIORITY:
  		case ISCSI_NET_PARAM_VLAN_ENABLED:

  		case ISCSI_NET_PARAM_MTU:

  		case ISCSI_NET_PARAM_PORT:

  			return S_IRUGO;
  		default:
  			return 0;
  		}

  	}
  
  	return 0;
  }

  static int qla4xxx_get_iface_param(struct iscsi_iface *iface,
  				   enum iscsi_param_type param_type,
  				   int param, char *buf)
  {
  	struct Scsi_Host *shost = iscsi_iface_to_shost(iface);
  	struct scsi_qla_host *ha = to_qla_host(shost);
  	int len = -ENOSYS;
  
  	if (param_type != ISCSI_NET_PARAM)
  		return -ENOSYS;
  
  	switch (param) {
  	case ISCSI_NET_PARAM_IPV4_ADDR:
  		len = sprintf(buf, "%pI4
  ", &ha->ip_config.ip_address);
  		break;
  	case ISCSI_NET_PARAM_IPV4_SUBNET:
  		len = sprintf(buf, "%pI4
  ", &ha->ip_config.subnet_mask);
  		break;
  	case ISCSI_NET_PARAM_IPV4_GW:
  		len = sprintf(buf, "%pI4
  ", &ha->ip_config.gateway);
  		break;
  	case ISCSI_NET_PARAM_IFACE_ENABLE:
  		if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
  			len = sprintf(buf, "%s
  ",
  				      (ha->ip_config.ipv4_options &
  				       IPOPT_IPV4_PROTOCOL_ENABLE) ?
  				      "enabled" : "disabled");
  		else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
  			len = sprintf(buf, "%s
  ",
  				      (ha->ip_config.ipv6_options &
  				       IPV6_OPT_IPV6_PROTOCOL_ENABLE) ?
  				       "enabled" : "disabled");
  		break;
  	case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
  		len = sprintf(buf, "%s
  ",
  			      (ha->ip_config.tcp_options & TCPOPT_DHCP_ENABLE) ?
  			      "dhcp" : "static");
  		break;
  	case ISCSI_NET_PARAM_IPV6_ADDR:
  		if (iface->iface_num == 0)
  			len = sprintf(buf, "%pI6
  ", &ha->ip_config.ipv6_addr0);
  		if (iface->iface_num == 1)
  			len = sprintf(buf, "%pI6
  ", &ha->ip_config.ipv6_addr1);
  		break;
  	case ISCSI_NET_PARAM_IPV6_LINKLOCAL:
  		len = sprintf(buf, "%pI6
  ",
  			      &ha->ip_config.ipv6_link_local_addr);
  		break;
  	case ISCSI_NET_PARAM_IPV6_ROUTER:
  		len = sprintf(buf, "%pI6
  ",
  			      &ha->ip_config.ipv6_default_router_addr);
  		break;
  	case ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG:
  		len = sprintf(buf, "%s
  ",
  			      (ha->ip_config.ipv6_addl_options &
  			       IPV6_ADDOPT_NEIGHBOR_DISCOVERY_ADDR_ENABLE) ?
  			       "nd" : "static");
  		break;
  	case ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG:
  		len = sprintf(buf, "%s
  ",
  			      (ha->ip_config.ipv6_addl_options &
  			       IPV6_ADDOPT_AUTOCONFIG_LINK_LOCAL_ADDR) ?
  			       "auto" : "static");
  		break;

  	case ISCSI_NET_PARAM_VLAN_ID:
  		if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
  			len = sprintf(buf, "%d
  ",
  				      (ha->ip_config.ipv4_vlan_tag &
  				       ISCSI_MAX_VLAN_ID));
  		else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
  			len = sprintf(buf, "%d
  ",
  				      (ha->ip_config.ipv6_vlan_tag &
  				       ISCSI_MAX_VLAN_ID));
  		break;
  	case ISCSI_NET_PARAM_VLAN_PRIORITY:
  		if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
  			len = sprintf(buf, "%d
  ",
  				      ((ha->ip_config.ipv4_vlan_tag >> 13) &
  					ISCSI_MAX_VLAN_PRIORITY));
  		else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
  			len = sprintf(buf, "%d
  ",
  				      ((ha->ip_config.ipv6_vlan_tag >> 13) &
  					ISCSI_MAX_VLAN_PRIORITY));
  		break;
  	case ISCSI_NET_PARAM_VLAN_ENABLED:
  		if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
  			len = sprintf(buf, "%s
  ",
  				      (ha->ip_config.ipv4_options &
  				       IPOPT_VLAN_TAGGING_ENABLE) ?
  				       "enabled" : "disabled");
  		else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
  			len = sprintf(buf, "%s
  ",
  				      (ha->ip_config.ipv6_options &
  				       IPV6_OPT_VLAN_TAGGING_ENABLE) ?
  				       "enabled" : "disabled");
  		break;

  	case ISCSI_NET_PARAM_MTU:
  		len = sprintf(buf, "%d
  ", ha->ip_config.eth_mtu_size);
  		break;

  	case ISCSI_NET_PARAM_PORT:
  		if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
  			len = sprintf(buf, "%d
  ", ha->ip_config.ipv4_port);
  		else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
  			len = sprintf(buf, "%d
  ", ha->ip_config.ipv6_port);
  		break;

  	default:
  		len = -ENOSYS;
  	}
  
  	return len;
  }

  static struct iscsi_endpoint *
  qla4xxx_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
  		   int non_blocking)

  {

  	int ret;
  	struct iscsi_endpoint *ep;
  	struct qla_endpoint *qla_ep;
  	struct scsi_qla_host *ha;
  	struct sockaddr_in *addr;
  	struct sockaddr_in6 *addr6;

  	DEBUG2(printk(KERN_INFO "Func: %s
  ", __func__));
  	if (!shost) {
  		ret = -ENXIO;
  		printk(KERN_ERR "%s: shost is NULL
  ",
  		       __func__);
  		return ERR_PTR(ret);
  	}

  	ha = iscsi_host_priv(shost);
  
  	ep = iscsi_create_endpoint(sizeof(struct qla_endpoint));
  	if (!ep) {
  		ret = -ENOMEM;
  		return ERR_PTR(ret);
  	}
  
  	qla_ep = ep->dd_data;
  	memset(qla_ep, 0, sizeof(struct qla_endpoint));
  	if (dst_addr->sa_family == AF_INET) {
  		memcpy(&qla_ep->dst_addr, dst_addr, sizeof(struct sockaddr_in));
  		addr = (struct sockaddr_in *)&qla_ep->dst_addr;
  		DEBUG2(ql4_printk(KERN_INFO, ha, "%s: %pI4
  ", __func__,
  				  (char *)&addr->sin_addr));
  	} else if (dst_addr->sa_family == AF_INET6) {
  		memcpy(&qla_ep->dst_addr, dst_addr,
  		       sizeof(struct sockaddr_in6));
  		addr6 = (struct sockaddr_in6 *)&qla_ep->dst_addr;
  		DEBUG2(ql4_printk(KERN_INFO, ha, "%s: %pI6
  ", __func__,
  				  (char *)&addr6->sin6_addr));
  	}
  
  	qla_ep->host = shost;
  
  	return ep;

  }

  static int qla4xxx_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)

  {

  	struct qla_endpoint *qla_ep;
  	struct scsi_qla_host *ha;
  	int ret = 0;

  	DEBUG2(printk(KERN_INFO "Func: %s
  ", __func__));
  	qla_ep = ep->dd_data;
  	ha = to_qla_host(qla_ep->host);

  	if (adapter_up(ha) && !test_bit(AF_BUILD_DDB_LIST, &ha->flags))

  		ret = 1;
  
  	return ret;
  }
  
  static void qla4xxx_ep_disconnect(struct iscsi_endpoint *ep)
  {
  	DEBUG2(printk(KERN_INFO "Func: %s
  ", __func__));
  	iscsi_destroy_endpoint(ep);
  }
  
  static int qla4xxx_get_ep_param(struct iscsi_endpoint *ep,
  				enum iscsi_param param,
  				char *buf)
  {
  	struct qla_endpoint *qla_ep = ep->dd_data;
  	struct sockaddr *dst_addr;
  
  	DEBUG2(printk(KERN_INFO "Func: %s
  ", __func__));
  
  	switch (param) {
  	case ISCSI_PARAM_CONN_PORT:
  	case ISCSI_PARAM_CONN_ADDRESS:
  		if (!qla_ep)
  			return -ENOTCONN;
  
  		dst_addr = (struct sockaddr *)&qla_ep->dst_addr;
  		if (!dst_addr)
  			return -ENOTCONN;
  
  		return iscsi_conn_get_addr_param((struct sockaddr_storage *)
  						 &qla_ep->dst_addr, param, buf);
  	default:
  		return -ENOSYS;
  	}
  }
  
  static void qla4xxx_conn_get_stats(struct iscsi_cls_conn *cls_conn,
  				   struct iscsi_stats *stats)
  {
  	struct iscsi_session *sess;
  	struct iscsi_cls_session *cls_sess;
  	struct ddb_entry *ddb_entry;
  	struct scsi_qla_host *ha;
  	struct ql_iscsi_stats *ql_iscsi_stats;
  	int stats_size;
  	int ret;
  	dma_addr_t iscsi_stats_dma;
  
  	DEBUG2(printk(KERN_INFO "Func: %s
  ", __func__));

  	cls_sess = iscsi_conn_to_session(cls_conn);
  	sess = cls_sess->dd_data;
  	ddb_entry = sess->dd_data;
  	ha = ddb_entry->ha;
  
  	stats_size = PAGE_ALIGN(sizeof(struct ql_iscsi_stats));
  	/* Allocate memory */
  	ql_iscsi_stats = dma_alloc_coherent(&ha->pdev->dev, stats_size,
  					    &iscsi_stats_dma, GFP_KERNEL);
  	if (!ql_iscsi_stats) {
  		ql4_printk(KERN_ERR, ha,
  			   "Unable to allocate memory for iscsi stats
  ");
  		goto exit_get_stats;

  	}

  
  	ret =  qla4xxx_get_mgmt_data(ha, ddb_entry->fw_ddb_index, stats_size,
  				     iscsi_stats_dma);
  	if (ret != QLA_SUCCESS) {
  		ql4_printk(KERN_ERR, ha,
  			   "Unable to retreive iscsi stats
  ");
  		goto free_stats;
  	}
  
  	/* octets */
  	stats->txdata_octets = le64_to_cpu(ql_iscsi_stats->tx_data_octets);
  	stats->rxdata_octets = le64_to_cpu(ql_iscsi_stats->rx_data_octets);
  	/* xmit pdus */
  	stats->noptx_pdus = le32_to_cpu(ql_iscsi_stats->tx_nopout_pdus);
  	stats->scsicmd_pdus = le32_to_cpu(ql_iscsi_stats->tx_scsi_cmd_pdus);
  	stats->tmfcmd_pdus = le32_to_cpu(ql_iscsi_stats->tx_tmf_cmd_pdus);
  	stats->login_pdus = le32_to_cpu(ql_iscsi_stats->tx_login_cmd_pdus);
  	stats->text_pdus = le32_to_cpu(ql_iscsi_stats->tx_text_cmd_pdus);
  	stats->dataout_pdus = le32_to_cpu(ql_iscsi_stats->tx_scsi_write_pdus);
  	stats->logout_pdus = le32_to_cpu(ql_iscsi_stats->tx_logout_cmd_pdus);
  	stats->snack_pdus = le32_to_cpu(ql_iscsi_stats->tx_snack_req_pdus);
  	/* recv pdus */
  	stats->noprx_pdus = le32_to_cpu(ql_iscsi_stats->rx_nopin_pdus);
  	stats->scsirsp_pdus = le32_to_cpu(ql_iscsi_stats->rx_scsi_resp_pdus);
  	stats->tmfrsp_pdus = le32_to_cpu(ql_iscsi_stats->rx_tmf_resp_pdus);
  	stats->textrsp_pdus = le32_to_cpu(ql_iscsi_stats->rx_text_resp_pdus);
  	stats->datain_pdus = le32_to_cpu(ql_iscsi_stats->rx_scsi_read_pdus);
  	stats->logoutrsp_pdus =
  			le32_to_cpu(ql_iscsi_stats->rx_logout_resp_pdus);
  	stats->r2t_pdus = le32_to_cpu(ql_iscsi_stats->rx_r2t_pdus);
  	stats->async_pdus = le32_to_cpu(ql_iscsi_stats->rx_async_pdus);
  	stats->rjt_pdus = le32_to_cpu(ql_iscsi_stats->rx_reject_pdus);
  
  free_stats:
  	dma_free_coherent(&ha->pdev->dev, stats_size, ql_iscsi_stats,
  			  iscsi_stats_dma);
  exit_get_stats:
  	return;
  }
  
  static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc)
  {
  	struct iscsi_cls_session *session;
  	struct iscsi_session *sess;
  	unsigned long flags;
  	enum blk_eh_timer_return ret = BLK_EH_NOT_HANDLED;
  
  	session = starget_to_session(scsi_target(sc->device));
  	sess = session->dd_data;
  
  	spin_lock_irqsave(&session->lock, flags);
  	if (session->state == ISCSI_SESSION_FAILED)
  		ret = BLK_EH_RESET_TIMER;
  	spin_unlock_irqrestore(&session->lock, flags);
  
  	return ret;

  }

  static int qla4xxx_host_get_param(struct Scsi_Host *shost,
  				  enum iscsi_host_param param, char *buf)
  {
  	struct scsi_qla_host *ha = to_qla_host(shost);
  	int len;
  
  	switch (param) {
  	case ISCSI_HOST_PARAM_HWADDRESS:

  		len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);

  		break;

  	case ISCSI_HOST_PARAM_IPADDRESS:

  		len = sprintf(buf, "%pI4
  ", &ha->ip_config.ip_address);

  		break;

  	case ISCSI_HOST_PARAM_INITIATOR_NAME:

  		len = sprintf(buf, "%s
  ", ha->name_string);

  		break;
  	default:
  		return -ENOSYS;
  	}
  
  	return len;
  }

  static void qla4xxx_create_ipv4_iface(struct scsi_qla_host *ha)
  {
  	if (ha->iface_ipv4)
  		return;
  
  	/* IPv4 */
  	ha->iface_ipv4 = iscsi_create_iface(ha->host,
  					    &qla4xxx_iscsi_transport,
  					    ISCSI_IFACE_TYPE_IPV4, 0, 0);
  	if (!ha->iface_ipv4)
  		ql4_printk(KERN_ERR, ha, "Could not create IPv4 iSCSI "
  			   "iface0.
  ");
  }
  
  static void qla4xxx_create_ipv6_iface(struct scsi_qla_host *ha)
  {
  	if (!ha->iface_ipv6_0)
  		/* IPv6 iface-0 */
  		ha->iface_ipv6_0 = iscsi_create_iface(ha->host,
  						      &qla4xxx_iscsi_transport,
  						      ISCSI_IFACE_TYPE_IPV6, 0,
  						      0);
  	if (!ha->iface_ipv6_0)
  		ql4_printk(KERN_ERR, ha, "Could not create IPv6 iSCSI "
  			   "iface0.
  ");
  
  	if (!ha->iface_ipv6_1)
  		/* IPv6 iface-1 */
  		ha->iface_ipv6_1 = iscsi_create_iface(ha->host,
  						      &qla4xxx_iscsi_transport,
  						      ISCSI_IFACE_TYPE_IPV6, 1,
  						      0);
  	if (!ha->iface_ipv6_1)
  		ql4_printk(KERN_ERR, ha, "Could not create IPv6 iSCSI "
  			   "iface1.
  ");
  }
  
  static void qla4xxx_create_ifaces(struct scsi_qla_host *ha)
  {
  	if (ha->ip_config.ipv4_options & IPOPT_IPV4_PROTOCOL_ENABLE)
  		qla4xxx_create_ipv4_iface(ha);
  
  	if (ha->ip_config.ipv6_options & IPV6_OPT_IPV6_PROTOCOL_ENABLE)
  		qla4xxx_create_ipv6_iface(ha);
  }
  
  static void qla4xxx_destroy_ipv4_iface(struct scsi_qla_host *ha)
  {
  	if (ha->iface_ipv4) {
  		iscsi_destroy_iface(ha->iface_ipv4);
  		ha->iface_ipv4 = NULL;
  	}
  }
  
  static void qla4xxx_destroy_ipv6_iface(struct scsi_qla_host *ha)
  {
  	if (ha->iface_ipv6_0) {
  		iscsi_destroy_iface(ha->iface_ipv6_0);
  		ha->iface_ipv6_0 = NULL;
  	}
  	if (ha->iface_ipv6_1) {
  		iscsi_destroy_iface(ha->iface_ipv6_1);
  		ha->iface_ipv6_1 = NULL;
  	}
  }
  
  static void qla4xxx_destroy_ifaces(struct scsi_qla_host *ha)
  {
  	qla4xxx_destroy_ipv4_iface(ha);
  	qla4xxx_destroy_ipv6_iface(ha);
  }

  static void qla4xxx_set_ipv6(struct scsi_qla_host *ha,
  			     struct iscsi_iface_param_info *iface_param,
  			     struct addr_ctrl_blk *init_fw_cb)
  {
  	/*
  	 * iface_num 0 is valid for IPv6 Addr, linklocal, router, autocfg.
  	 * iface_num 1 is valid only for IPv6 Addr.
  	 */
  	switch (iface_param->param) {
  	case ISCSI_NET_PARAM_IPV6_ADDR:
  		if (iface_param->iface_num & 0x1)
  			/* IPv6 Addr 1 */
  			memcpy(init_fw_cb->ipv6_addr1, iface_param->value,
  			       sizeof(init_fw_cb->ipv6_addr1));
  		else
  			/* IPv6 Addr 0 */
  			memcpy(init_fw_cb->ipv6_addr0, iface_param->value,
  			       sizeof(init_fw_cb->ipv6_addr0));
  		break;
  	case ISCSI_NET_PARAM_IPV6_LINKLOCAL:
  		if (iface_param->iface_num & 0x1)
  			break;
  		memcpy(init_fw_cb->ipv6_if_id, &iface_param->value[8],
  		       sizeof(init_fw_cb->ipv6_if_id));
  		break;
  	case ISCSI_NET_PARAM_IPV6_ROUTER:
  		if (iface_param->iface_num & 0x1)
  			break;
  		memcpy(init_fw_cb->ipv6_dflt_rtr_addr, iface_param->value,
  		       sizeof(init_fw_cb->ipv6_dflt_rtr_addr));
  		break;
  	case ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG:
  		/* Autocfg applies to even interface */
  		if (iface_param->iface_num & 0x1)
  			break;
  
  		if (iface_param->value[0] == ISCSI_IPV6_AUTOCFG_DISABLE)
  			init_fw_cb->ipv6_addtl_opts &=
  				cpu_to_le16(
  				  ~IPV6_ADDOPT_NEIGHBOR_DISCOVERY_ADDR_ENABLE);
  		else if (iface_param->value[0] == ISCSI_IPV6_AUTOCFG_ND_ENABLE)
  			init_fw_cb->ipv6_addtl_opts |=
  				cpu_to_le16(
  				  IPV6_ADDOPT_NEIGHBOR_DISCOVERY_ADDR_ENABLE);
  		else
  			ql4_printk(KERN_ERR, ha, "Invalid autocfg setting for "
  				   "IPv6 addr
  ");
  		break;
  	case ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG:
  		/* Autocfg applies to even interface */
  		if (iface_param->iface_num & 0x1)
  			break;
  
  		if (iface_param->value[0] ==
  		    ISCSI_IPV6_LINKLOCAL_AUTOCFG_ENABLE)
  			init_fw_cb->ipv6_addtl_opts |= cpu_to_le16(
  					IPV6_ADDOPT_AUTOCONFIG_LINK_LOCAL_ADDR);
  		else if (iface_param->value[0] ==
  			 ISCSI_IPV6_LINKLOCAL_AUTOCFG_DISABLE)
  			init_fw_cb->ipv6_addtl_opts &= cpu_to_le16(
  				       ~IPV6_ADDOPT_AUTOCONFIG_LINK_LOCAL_ADDR);
  		else
  			ql4_printk(KERN_ERR, ha, "Invalid autocfg setting for "
  				   "IPv6 linklocal addr
  ");
  		break;
  	case ISCSI_NET_PARAM_IPV6_ROUTER_AUTOCFG:
  		/* Autocfg applies to even interface */
  		if (iface_param->iface_num & 0x1)
  			break;
  
  		if (iface_param->value[0] == ISCSI_IPV6_ROUTER_AUTOCFG_ENABLE)
  			memset(init_fw_cb->ipv6_dflt_rtr_addr, 0,
  			       sizeof(init_fw_cb->ipv6_dflt_rtr_addr));
  		break;
  	case ISCSI_NET_PARAM_IFACE_ENABLE:

  		if (iface_param->value[0] == ISCSI_IFACE_ENABLE) {

  			init_fw_cb->ipv6_opts |=
  				cpu_to_le16(IPV6_OPT_IPV6_PROTOCOL_ENABLE);

  			qla4xxx_create_ipv6_iface(ha);
  		} else {

  			init_fw_cb->ipv6_opts &=
  				cpu_to_le16(~IPV6_OPT_IPV6_PROTOCOL_ENABLE &
  					    0xFFFF);

  			qla4xxx_destroy_ipv6_iface(ha);
  		}

  		break;

  	case ISCSI_NET_PARAM_VLAN_TAG:

  		if (iface_param->len != sizeof(init_fw_cb->ipv6_vlan_tag))
  			break;

  		init_fw_cb->ipv6_vlan_tag =
  				cpu_to_be16(*(uint16_t *)iface_param->value);
  		break;
  	case ISCSI_NET_PARAM_VLAN_ENABLED:
  		if (iface_param->value[0] == ISCSI_VLAN_ENABLE)
  			init_fw_cb->ipv6_opts |=
  				cpu_to_le16(IPV6_OPT_VLAN_TAGGING_ENABLE);
  		else
  			init_fw_cb->ipv6_opts &=
  				cpu_to_le16(~IPV6_OPT_VLAN_TAGGING_ENABLE);

  		break;

  	case ISCSI_NET_PARAM_MTU:
  		init_fw_cb->eth_mtu_size =
  				cpu_to_le16(*(uint16_t *)iface_param->value);
  		break;

  	case ISCSI_NET_PARAM_PORT:
  		/* Autocfg applies to even interface */
  		if (iface_param->iface_num & 0x1)
  			break;
  
  		init_fw_cb->ipv6_port =
  				cpu_to_le16(*(uint16_t *)iface_param->value);
  		break;

  	default:
  		ql4_printk(KERN_ERR, ha, "Unknown IPv6 param = %d
  ",
  			   iface_param->param);
  		break;
  	}
  }
  
  static void qla4xxx_set_ipv4(struct scsi_qla_host *ha,
  			     struct iscsi_iface_param_info *iface_param,
  			     struct addr_ctrl_blk *init_fw_cb)
  {
  	switch (iface_param->param) {
  	case ISCSI_NET_PARAM_IPV4_ADDR:
  		memcpy(init_fw_cb->ipv4_addr, iface_param->value,
  		       sizeof(init_fw_cb->ipv4_addr));
  		break;
  	case ISCSI_NET_PARAM_IPV4_SUBNET:
  		memcpy(init_fw_cb->ipv4_subnet,	iface_param->value,
  		       sizeof(init_fw_cb->ipv4_subnet));
  		break;
  	case ISCSI_NET_PARAM_IPV4_GW:
  		memcpy(init_fw_cb->ipv4_gw_addr, iface_param->value,
  		       sizeof(init_fw_cb->ipv4_gw_addr));
  		break;
  	case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
  		if (iface_param->value[0] == ISCSI_BOOTPROTO_DHCP)
  			init_fw_cb->ipv4_tcp_opts |=
  					cpu_to_le16(TCPOPT_DHCP_ENABLE);
  		else if (iface_param->value[0] == ISCSI_BOOTPROTO_STATIC)
  			init_fw_cb->ipv4_tcp_opts &=
  					cpu_to_le16(~TCPOPT_DHCP_ENABLE);
  		else
  			ql4_printk(KERN_ERR, ha, "Invalid IPv4 bootproto
  ");
  		break;
  	case ISCSI_NET_PARAM_IFACE_ENABLE:

  		if (iface_param->value[0] == ISCSI_IFACE_ENABLE) {

  			init_fw_cb->ipv4_ip_opts |=

  				cpu_to_le16(IPOPT_IPV4_PROTOCOL_ENABLE);

  			qla4xxx_create_ipv4_iface(ha);
  		} else {

  			init_fw_cb->ipv4_ip_opts &=

  				cpu_to_le16(~IPOPT_IPV4_PROTOCOL_ENABLE &

  					    0xFFFF);

  			qla4xxx_destroy_ipv4_iface(ha);
  		}

  		break;

  	case ISCSI_NET_PARAM_VLAN_TAG:

  		if (iface_param->len != sizeof(init_fw_cb->ipv4_vlan_tag))
  			break;

  		init_fw_cb->ipv4_vlan_tag =
  				cpu_to_be16(*(uint16_t *)iface_param->value);
  		break;
  	case ISCSI_NET_PARAM_VLAN_ENABLED:
  		if (iface_param->value[0] == ISCSI_VLAN_ENABLE)
  			init_fw_cb->ipv4_ip_opts |=
  					cpu_to_le16(IPOPT_VLAN_TAGGING_ENABLE);
  		else
  			init_fw_cb->ipv4_ip_opts &=
  					cpu_to_le16(~IPOPT_VLAN_TAGGING_ENABLE);

  		break;

  	case ISCSI_NET_PARAM_MTU:
  		init_fw_cb->eth_mtu_size =
  				cpu_to_le16(*(uint16_t *)iface_param->value);
  		break;

  	case ISCSI_NET_PARAM_PORT:
  		init_fw_cb->ipv4_port =
  				cpu_to_le16(*(uint16_t *)iface_param->value);
  		break;

  	default:
  		ql4_printk(KERN_ERR, ha, "Unknown IPv4 param = %d
  ",
  			   iface_param->param);
  		break;
  	}
  }
  
  static void
  qla4xxx_initcb_to_acb(struct addr_ctrl_blk *init_fw_cb)
  {
  	struct addr_ctrl_blk_def *acb;
  	acb = (struct addr_ctrl_blk_def *)init_fw_cb;
  	memset(acb->reserved1, 0, sizeof(acb->reserved1));
  	memset(acb->reserved2, 0, sizeof(acb->reserved2));
  	memset(acb->reserved3, 0, sizeof(acb->reserved3));
  	memset(acb->reserved4, 0, sizeof(acb->reserved4));
  	memset(acb->reserved5, 0, sizeof(acb->reserved5));
  	memset(acb->reserved6, 0, sizeof(acb->reserved6));
  	memset(acb->reserved7, 0, sizeof(acb->reserved7));
  	memset(acb->reserved8, 0, sizeof(acb->reserved8));
  	memset(acb->reserved9, 0, sizeof(acb->reserved9));
  	memset(acb->reserved10, 0, sizeof(acb->reserved10));
  	memset(acb->reserved11, 0, sizeof(acb->reserved11));
  	memset(acb->reserved12, 0, sizeof(acb->reserved12));
  	memset(acb->reserved13, 0, sizeof(acb->reserved13));
  	memset(acb->reserved14, 0, sizeof(acb->reserved14));
  	memset(acb->reserved15, 0, sizeof(acb->reserved15));
  }
  
  static int

  qla4xxx_iface_set_param(struct Scsi_Host *shost, void *data, uint32_t len)

  {
  	struct scsi_qla_host *ha = to_qla_host(shost);
  	int rval = 0;
  	struct iscsi_iface_param_info *iface_param = NULL;
  	struct addr_ctrl_blk *init_fw_cb = NULL;
  	dma_addr_t init_fw_cb_dma;
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];

  	uint32_t rem = len;
  	struct nlattr *attr;

  
  	init_fw_cb = dma_alloc_coherent(&ha->pdev->dev,
  					sizeof(struct addr_ctrl_blk),
  					&init_fw_cb_dma, GFP_KERNEL);
  	if (!init_fw_cb) {
  		ql4_printk(KERN_ERR, ha, "%s: Unable to alloc init_cb
  ",
  			   __func__);
  		return -ENOMEM;
  	}
  
  	memset(init_fw_cb, 0, sizeof(struct addr_ctrl_blk));
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_sts));
  
  	if (qla4xxx_get_ifcb(ha, &mbox_cmd[0], &mbox_sts[0], init_fw_cb_dma)) {
  		ql4_printk(KERN_ERR, ha, "%s: get ifcb failed
  ", __func__);
  		rval = -EIO;
  		goto exit_init_fw_cb;
  	}

  	nla_for_each_attr(attr, data, len, rem) {
  		iface_param = nla_data(attr);

  
  		if (iface_param->param_type != ISCSI_NET_PARAM)
  			continue;
  
  		switch (iface_param->iface_type) {
  		case ISCSI_IFACE_TYPE_IPV4:
  			switch (iface_param->iface_num) {
  			case 0:
  				qla4xxx_set_ipv4(ha, iface_param, init_fw_cb);
  				break;
  			default:
  				/* Cannot have more than one IPv4 interface */
  				ql4_printk(KERN_ERR, ha, "Invalid IPv4 iface "
  					   "number = %d
  ",
  					   iface_param->iface_num);
  				break;
  			}
  			break;
  		case ISCSI_IFACE_TYPE_IPV6:
  			switch (iface_param->iface_num) {
  			case 0:
  			case 1:
  				qla4xxx_set_ipv6(ha, iface_param, init_fw_cb);
  				break;
  			default:
  				/* Cannot have more than two IPv6 interface */
  				ql4_printk(KERN_ERR, ha, "Invalid IPv6 iface "
  					   "number = %d
  ",
  					   iface_param->iface_num);
  				break;
  			}
  			break;
  		default:
  			ql4_printk(KERN_ERR, ha, "Invalid iface type
  ");
  			break;
  		}

  	}
  
  	init_fw_cb->cookie = cpu_to_le32(0x11BEAD5A);
  
  	rval = qla4xxx_set_flash(ha, init_fw_cb_dma, FLASH_SEGMENT_IFCB,
  				 sizeof(struct addr_ctrl_blk),
  				 FLASH_OPT_RMW_COMMIT);
  	if (rval != QLA_SUCCESS) {
  		ql4_printk(KERN_ERR, ha, "%s: set flash mbx failed
  ",
  			   __func__);
  		rval = -EIO;
  		goto exit_init_fw_cb;
  	}

  	rval = qla4xxx_disable_acb(ha);
  	if (rval != QLA_SUCCESS) {
  		ql4_printk(KERN_ERR, ha, "%s: disable acb mbx failed
  ",
  			   __func__);
  		rval = -EIO;
  		goto exit_init_fw_cb;
  	}
  
  	wait_for_completion_timeout(&ha->disable_acb_comp,
  				    DISABLE_ACB_TOV * HZ);

  
  	qla4xxx_initcb_to_acb(init_fw_cb);
  
  	rval = qla4xxx_set_acb(ha, &mbox_cmd[0], &mbox_sts[0], init_fw_cb_dma);
  	if (rval != QLA_SUCCESS) {
  		ql4_printk(KERN_ERR, ha, "%s: set acb mbx failed
  ",
  			   __func__);
  		rval = -EIO;
  		goto exit_init_fw_cb;
  	}
  
  	memset(init_fw_cb, 0, sizeof(struct addr_ctrl_blk));
  	qla4xxx_update_local_ifcb(ha, &mbox_cmd[0], &mbox_sts[0], init_fw_cb,
  				  init_fw_cb_dma);
  
  exit_init_fw_cb:
  	dma_free_coherent(&ha->pdev->dev, sizeof(struct addr_ctrl_blk),
  			  init_fw_cb, init_fw_cb_dma);
  
  	return rval;
  }

  static int qla4xxx_conn_get_param(struct iscsi_cls_conn *cls_conn,

  				  enum iscsi_param param, char *buf)
  {

  	struct iscsi_conn *conn;
  	struct qla_conn *qla_conn;
  	struct sockaddr *dst_addr;
  	int len = 0;

  	conn = cls_conn->dd_data;
  	qla_conn = conn->dd_data;
  	dst_addr = &qla_conn->qla_ep->dst_addr;

  
  	switch (param) {
  	case ISCSI_PARAM_CONN_PORT:

  	case ISCSI_PARAM_CONN_ADDRESS:

  		return iscsi_conn_get_addr_param((struct sockaddr_storage *)
  						 dst_addr, param, buf);

  	default:

  		return iscsi_conn_get_param(cls_conn, param, buf);

  	}
  
  	return len;

  }

  int qla4xxx_get_ddb_index(struct scsi_qla_host *ha, uint16_t *ddb_index)
  {
  	uint32_t mbx_sts = 0;
  	uint16_t tmp_ddb_index;
  	int ret;
  
  get_ddb_index:
  	tmp_ddb_index = find_first_zero_bit(ha->ddb_idx_map, MAX_DDB_ENTRIES);
  
  	if (tmp_ddb_index >= MAX_DDB_ENTRIES) {
  		DEBUG2(ql4_printk(KERN_INFO, ha,
  				  "Free DDB index not available
  "));
  		ret = QLA_ERROR;
  		goto exit_get_ddb_index;
  	}
  
  	if (test_and_set_bit(tmp_ddb_index, ha->ddb_idx_map))
  		goto get_ddb_index;
  
  	DEBUG2(ql4_printk(KERN_INFO, ha,
  			  "Found a free DDB index at %d
  ", tmp_ddb_index));
  	ret = qla4xxx_req_ddb_entry(ha, tmp_ddb_index, &mbx_sts);
  	if (ret == QLA_ERROR) {
  		if (mbx_sts == MBOX_STS_COMMAND_ERROR) {
  			ql4_printk(KERN_INFO, ha,
  				   "DDB index = %d not available trying next
  ",
  				   tmp_ddb_index);
  			goto get_ddb_index;
  		}
  		DEBUG2(ql4_printk(KERN_INFO, ha,
  				  "Free FW DDB not available
  "));
  	}
  
  	*ddb_index = tmp_ddb_index;
  
  exit_get_ddb_index:
  	return ret;
  }
  
  static int qla4xxx_match_ipaddress(struct scsi_qla_host *ha,
  				   struct ddb_entry *ddb_entry,
  				   char *existing_ipaddr,
  				   char *user_ipaddr)
  {
  	uint8_t dst_ipaddr[IPv6_ADDR_LEN];
  	char formatted_ipaddr[DDB_IPADDR_LEN];
  	int status = QLA_SUCCESS, ret = 0;
  
  	if (ddb_entry->fw_ddb_entry.options & DDB_OPT_IPV6_DEVICE) {
  		ret = in6_pton(user_ipaddr, strlen(user_ipaddr), dst_ipaddr,
  			       '\0', NULL);
  		if (ret == 0) {
  			status = QLA_ERROR;
  			goto out_match;
  		}
  		ret = sprintf(formatted_ipaddr, "%pI6", dst_ipaddr);
  	} else {
  		ret = in4_pton(user_ipaddr, strlen(user_ipaddr), dst_ipaddr,
  			       '\0', NULL);
  		if (ret == 0) {
  			status = QLA_ERROR;
  			goto out_match;
  		}
  		ret = sprintf(formatted_ipaddr, "%pI4", dst_ipaddr);
  	}
  
  	if (strcmp(existing_ipaddr, formatted_ipaddr))
  		status = QLA_ERROR;
  
  out_match:
  	return status;
  }
  
  static int qla4xxx_match_fwdb_session(struct scsi_qla_host *ha,
  				      struct iscsi_cls_conn *cls_conn)
  {
  	int idx = 0, max_ddbs, rval;
  	struct iscsi_cls_session *cls_sess = iscsi_conn_to_session(cls_conn);
  	struct iscsi_session *sess, *existing_sess;
  	struct iscsi_conn *conn, *existing_conn;
  	struct ddb_entry *ddb_entry;
  
  	sess = cls_sess->dd_data;
  	conn = cls_conn->dd_data;
  
  	if (sess->targetname == NULL ||
  	    conn->persistent_address == NULL ||
  	    conn->persistent_port == 0)
  		return QLA_ERROR;
  
  	max_ddbs =  is_qla40XX(ha) ? MAX_DEV_DB_ENTRIES_40XX :
  				     MAX_DEV_DB_ENTRIES;
  
  	for (idx = 0; idx < max_ddbs; idx++) {
  		ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, idx);
  		if (ddb_entry == NULL)
  			continue;
  
  		if (ddb_entry->ddb_type != FLASH_DDB)
  			continue;
  
  		existing_sess = ddb_entry->sess->dd_data;
  		existing_conn = ddb_entry->conn->dd_data;
  
  		if (existing_sess->targetname == NULL ||
  		    existing_conn->persistent_address == NULL ||
  		    existing_conn->persistent_port == 0)
  			continue;
  
  		DEBUG2(ql4_printk(KERN_INFO, ha,
  				  "IQN = %s User IQN = %s
  ",
  				  existing_sess->targetname,
  				  sess->targetname));
  
  		DEBUG2(ql4_printk(KERN_INFO, ha,
  				  "IP = %s User IP = %s
  ",
  				  existing_conn->persistent_address,
  				  conn->persistent_address));
  
  		DEBUG2(ql4_printk(KERN_INFO, ha,
  				  "Port = %d User Port = %d
  ",
  				  existing_conn->persistent_port,
  				  conn->persistent_port));
  
  		if (strcmp(existing_sess->targetname, sess->targetname))
  			continue;
  		rval = qla4xxx_match_ipaddress(ha, ddb_entry,
  					existing_conn->persistent_address,
  					conn->persistent_address);
  		if (rval == QLA_ERROR)
  			continue;
  		if (existing_conn->persistent_port != conn->persistent_port)
  			continue;
  		break;
  	}
  
  	if (idx == max_ddbs)
  		return QLA_ERROR;
  
  	DEBUG2(ql4_printk(KERN_INFO, ha,
  			  "Match found in fwdb sessions
  "));
  	return QLA_SUCCESS;
  }

  static struct iscsi_cls_session *
  qla4xxx_session_create(struct iscsi_endpoint *ep,
  			uint16_t cmds_max, uint16_t qdepth,
  			uint32_t initial_cmdsn)
  {
  	struct iscsi_cls_session *cls_sess;
  	struct scsi_qla_host *ha;
  	struct qla_endpoint *qla_ep;
  	struct ddb_entry *ddb_entry;

  	uint16_t ddb_index;

  	struct iscsi_session *sess;
  	struct sockaddr *dst_addr;
  	int ret;
  
  	DEBUG2(printk(KERN_INFO "Func: %s
  ", __func__));
  	if (!ep) {
  		printk(KERN_ERR "qla4xxx: missing ep.
  ");
  		return NULL;
  	}
  
  	qla_ep = ep->dd_data;
  	dst_addr = (struct sockaddr *)&qla_ep->dst_addr;
  	ha = to_qla_host(qla_ep->host);

  	ret = qla4xxx_get_ddb_index(ha, &ddb_index);
  	if (ret == QLA_ERROR)

  		return NULL;

  
  	cls_sess = iscsi_session_setup(&qla4xxx_iscsi_transport, qla_ep->host,
  				       cmds_max, sizeof(struct ddb_entry),
  				       sizeof(struct ql4_task_data),
  				       initial_cmdsn, ddb_index);
  	if (!cls_sess)
  		return NULL;
  
  	sess = cls_sess->dd_data;
  	ddb_entry = sess->dd_data;
  	ddb_entry->fw_ddb_index = ddb_index;
  	ddb_entry->fw_ddb_device_state = DDB_DS_NO_CONNECTION_ACTIVE;
  	ddb_entry->ha = ha;
  	ddb_entry->sess = cls_sess;

  	ddb_entry->unblock_sess = qla4xxx_unblock_ddb;
  	ddb_entry->ddb_change = qla4xxx_ddb_change;

  	cls_sess->recovery_tmo = ql4xsess_recovery_tmo;
  	ha->fw_ddb_index_map[ddb_entry->fw_ddb_index] = ddb_entry;
  	ha->tot_ddbs++;
  
  	return cls_sess;
  }
  
  static void qla4xxx_session_destroy(struct iscsi_cls_session *cls_sess)
  {
  	struct iscsi_session *sess;
  	struct ddb_entry *ddb_entry;
  	struct scsi_qla_host *ha;
  	unsigned long flags;
  
  	DEBUG2(printk(KERN_INFO "Func: %s
  ", __func__));
  	sess = cls_sess->dd_data;
  	ddb_entry = sess->dd_data;
  	ha = ddb_entry->ha;

  	qla4xxx_clear_ddb_entry(ha, ddb_entry->fw_ddb_index);

  	spin_lock_irqsave(&ha->hardware_lock, flags);
  	qla4xxx_free_ddb(ha, ddb_entry);
  	spin_unlock_irqrestore(&ha->hardware_lock, flags);
  	iscsi_session_teardown(cls_sess);
  }

  static struct iscsi_cls_conn *
  qla4xxx_conn_create(struct iscsi_cls_session *cls_sess, uint32_t conn_idx)
  {
  	struct iscsi_cls_conn *cls_conn;
  	struct iscsi_session *sess;
  	struct ddb_entry *ddb_entry;
  
  	DEBUG2(printk(KERN_INFO "Func: %s
  ", __func__));
  	cls_conn = iscsi_conn_setup(cls_sess, sizeof(struct qla_conn),
  				    conn_idx);

  	if (!cls_conn)
  		return NULL;

  	sess = cls_sess->dd_data;
  	ddb_entry = sess->dd_data;
  	ddb_entry->conn = cls_conn;
  
  	return cls_conn;
  }
  
  static int qla4xxx_conn_bind(struct iscsi_cls_session *cls_session,
  			     struct iscsi_cls_conn *cls_conn,
  			     uint64_t transport_fd, int is_leading)
  {
  	struct iscsi_conn *conn;
  	struct qla_conn *qla_conn;
  	struct iscsi_endpoint *ep;
  
  	DEBUG2(printk(KERN_INFO "Func: %s
  ", __func__));
  
  	if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
  		return -EINVAL;
  	ep = iscsi_lookup_endpoint(transport_fd);
  	conn = cls_conn->dd_data;
  	qla_conn = conn->dd_data;
  	qla_conn->qla_ep = ep->dd_data;
  	return 0;
  }
  
  static int qla4xxx_conn_start(struct iscsi_cls_conn *cls_conn)
  {
  	struct iscsi_cls_session *cls_sess = iscsi_conn_to_session(cls_conn);
  	struct iscsi_session *sess;
  	struct ddb_entry *ddb_entry;
  	struct scsi_qla_host *ha;

  	struct dev_db_entry *fw_ddb_entry = NULL;

  	dma_addr_t fw_ddb_entry_dma;

  	uint32_t mbx_sts = 0;
  	int ret = 0;
  	int status = QLA_SUCCESS;
  
  	DEBUG2(printk(KERN_INFO "Func: %s
  ", __func__));
  	sess = cls_sess->dd_data;
  	ddb_entry = sess->dd_data;
  	ha = ddb_entry->ha;

  	/* Check if we have  matching FW DDB, if yes then do not
  	 * login to this target. This could cause target to logout previous
  	 * connection
  	 */
  	ret = qla4xxx_match_fwdb_session(ha, cls_conn);
  	if (ret == QLA_SUCCESS) {
  		ql4_printk(KERN_INFO, ha,
  			   "Session already exist in FW.
  ");
  		ret = -EEXIST;
  		goto exit_conn_start;
  	}

  	fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
  					  &fw_ddb_entry_dma, GFP_KERNEL);
  	if (!fw_ddb_entry) {
  		ql4_printk(KERN_ERR, ha,
  			   "%s: Unable to allocate dma buffer
  ", __func__);

  		ret = -ENOMEM;
  		goto exit_conn_start;

  	}
  
  	ret = qla4xxx_set_param_ddbentry(ha, ddb_entry, cls_conn, &mbx_sts);
  	if (ret) {
  		/* If iscsid is stopped and started then no need to do
  		* set param again since ddb state will be already
  		* active and FW does not allow set ddb to an
  		* active session.
  		*/
  		if (mbx_sts)
  			if (ddb_entry->fw_ddb_device_state ==

  						DDB_DS_SESSION_ACTIVE) {

  				ddb_entry->unblock_sess(ddb_entry->sess);

  				goto exit_set_param;

  			}

  
  		ql4_printk(KERN_ERR, ha, "%s: Failed set param for index[%d]
  ",
  			   __func__, ddb_entry->fw_ddb_index);
  		goto exit_conn_start;
  	}
  
  	status = qla4xxx_conn_open(ha, ddb_entry->fw_ddb_index);
  	if (status == QLA_ERROR) {

  		ql4_printk(KERN_ERR, ha, "%s: Login failed: %s
  ", __func__,
  			   sess->targetname);

  		ret = -EINVAL;
  		goto exit_conn_start;
  	}

  	if (ddb_entry->fw_ddb_device_state == DDB_DS_NO_CONNECTION_ACTIVE)
  		ddb_entry->fw_ddb_device_state = DDB_DS_LOGIN_IN_PROCESS;
  
  	DEBUG2(printk(KERN_INFO "%s: DDB state [%d]
  ", __func__,
  		      ddb_entry->fw_ddb_device_state));

  
  exit_set_param:

  	ret = 0;
  
  exit_conn_start:

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

  	return ret;
  }
  
  static void qla4xxx_conn_destroy(struct iscsi_cls_conn *cls_conn)
  {
  	struct iscsi_cls_session *cls_sess = iscsi_conn_to_session(cls_conn);
  	struct iscsi_session *sess;
  	struct scsi_qla_host *ha;
  	struct ddb_entry *ddb_entry;
  	int options;
  
  	DEBUG2(printk(KERN_INFO "Func: %s
  ", __func__));
  	sess = cls_sess->dd_data;
  	ddb_entry = sess->dd_data;
  	ha = ddb_entry->ha;
  
  	options = LOGOUT_OPTION_CLOSE_SESSION;
  	if (qla4xxx_session_logout_ddb(ha, ddb_entry, options) == QLA_ERROR)
  		ql4_printk(KERN_ERR, ha, "%s: Logout failed
  ", __func__);

  }
  
  static void qla4xxx_task_work(struct work_struct *wdata)
  {
  	struct ql4_task_data *task_data;
  	struct scsi_qla_host *ha;
  	struct passthru_status *sts;
  	struct iscsi_task *task;
  	struct iscsi_hdr *hdr;
  	uint8_t *data;
  	uint32_t data_len;
  	struct iscsi_conn *conn;
  	int hdr_len;
  	itt_t itt;
  
  	task_data = container_of(wdata, struct ql4_task_data, task_work);
  	ha = task_data->ha;
  	task = task_data->task;
  	sts = &task_data->sts;
  	hdr_len = sizeof(struct iscsi_hdr);
  
  	DEBUG3(printk(KERN_INFO "Status returned
  "));
  	DEBUG3(qla4xxx_dump_buffer(sts, 64));
  	DEBUG3(printk(KERN_INFO "Response buffer"));
  	DEBUG3(qla4xxx_dump_buffer(task_data->resp_buffer, 64));
  
  	conn = task->conn;
  
  	switch (sts->completionStatus) {
  	case PASSTHRU_STATUS_COMPLETE:
  		hdr = (struct iscsi_hdr *)task_data->resp_buffer;
  		/* Assign back the itt in hdr, until we use the PREASSIGN_TAG */
  		itt = sts->handle;
  		hdr->itt = itt;
  		data = task_data->resp_buffer + hdr_len;
  		data_len = task_data->resp_len - hdr_len;
  		iscsi_complete_pdu(conn, hdr, data, data_len);
  		break;
  	default:
  		ql4_printk(KERN_ERR, ha, "Passthru failed status = 0x%x
  ",
  			   sts->completionStatus);
  		break;
  	}
  	return;
  }
  
  static int qla4xxx_alloc_pdu(struct iscsi_task *task, uint8_t opcode)
  {
  	struct ql4_task_data *task_data;
  	struct iscsi_session *sess;
  	struct ddb_entry *ddb_entry;
  	struct scsi_qla_host *ha;
  	int hdr_len;
  
  	sess = task->conn->session;
  	ddb_entry = sess->dd_data;
  	ha = ddb_entry->ha;
  	task_data = task->dd_data;
  	memset(task_data, 0, sizeof(struct ql4_task_data));
  
  	if (task->sc) {
  		ql4_printk(KERN_INFO, ha,
  			   "%s: SCSI Commands not implemented
  ", __func__);
  		return -EINVAL;
  	}
  
  	hdr_len = sizeof(struct iscsi_hdr);
  	task_data->ha = ha;
  	task_data->task = task;
  
  	if (task->data_count) {
  		task_data->data_dma = dma_map_single(&ha->pdev->dev, task->data,
  						     task->data_count,
  						     PCI_DMA_TODEVICE);
  	}
  
  	DEBUG2(ql4_printk(KERN_INFO, ha, "%s: MaxRecvLen %u, iscsi hrd %d
  ",
  		      __func__, task->conn->max_recv_dlength, hdr_len));

  	task_data->resp_len = task->conn->max_recv_dlength + hdr_len;

  	task_data->resp_buffer = dma_alloc_coherent(&ha->pdev->dev,
  						    task_data->resp_len,
  						    &task_data->resp_dma,
  						    GFP_ATOMIC);
  	if (!task_data->resp_buffer)
  		goto exit_alloc_pdu;

  	task_data->req_len = task->data_count + hdr_len;

  	task_data->req_buffer = dma_alloc_coherent(&ha->pdev->dev,

  						   task_data->req_len,

  						   &task_data->req_dma,
  						   GFP_ATOMIC);
  	if (!task_data->req_buffer)
  		goto exit_alloc_pdu;
  
  	task->hdr = task_data->req_buffer;
  
  	INIT_WORK(&task_data->task_work, qla4xxx_task_work);
  
  	return 0;
  
  exit_alloc_pdu:
  	if (task_data->resp_buffer)
  		dma_free_coherent(&ha->pdev->dev, task_data->resp_len,
  				  task_data->resp_buffer, task_data->resp_dma);
  
  	if (task_data->req_buffer)

  		dma_free_coherent(&ha->pdev->dev, task_data->req_len,

  				  task_data->req_buffer, task_data->req_dma);
  	return -ENOMEM;
  }
  
  static void qla4xxx_task_cleanup(struct iscsi_task *task)
  {
  	struct ql4_task_data *task_data;
  	struct iscsi_session *sess;
  	struct ddb_entry *ddb_entry;
  	struct scsi_qla_host *ha;
  	int hdr_len;
  
  	hdr_len = sizeof(struct iscsi_hdr);
  	sess = task->conn->session;
  	ddb_entry = sess->dd_data;
  	ha = ddb_entry->ha;
  	task_data = task->dd_data;
  
  	if (task->data_count) {
  		dma_unmap_single(&ha->pdev->dev, task_data->data_dma,
  				 task->data_count, PCI_DMA_TODEVICE);
  	}
  
  	DEBUG2(ql4_printk(KERN_INFO, ha, "%s: MaxRecvLen %u, iscsi hrd %d
  ",
  		      __func__, task->conn->max_recv_dlength, hdr_len));
  
  	dma_free_coherent(&ha->pdev->dev, task_data->resp_len,
  			  task_data->resp_buffer, task_data->resp_dma);

  	dma_free_coherent(&ha->pdev->dev, task_data->req_len,

  			  task_data->req_buffer, task_data->req_dma);
  	return;
  }
  
  static int qla4xxx_task_xmit(struct iscsi_task *task)
  {
  	struct scsi_cmnd *sc = task->sc;
  	struct iscsi_session *sess = task->conn->session;
  	struct ddb_entry *ddb_entry = sess->dd_data;
  	struct scsi_qla_host *ha = ddb_entry->ha;
  
  	if (!sc)
  		return qla4xxx_send_passthru0(task);
  
  	ql4_printk(KERN_INFO, ha, "%s: scsi cmd xmit not implemented
  ",
  		   __func__);
  	return -ENOSYS;
  }

  static void qla4xxx_copy_fwddb_param(struct scsi_qla_host *ha,
  				     struct dev_db_entry *fw_ddb_entry,
  				     struct iscsi_cls_session *cls_sess,
  				     struct iscsi_cls_conn *cls_conn)
  {
  	int buflen = 0;
  	struct iscsi_session *sess;
  	struct iscsi_conn *conn;
  	char ip_addr[DDB_IPADDR_LEN];
  	uint16_t options = 0;
  
  	sess = cls_sess->dd_data;
  	conn = cls_conn->dd_data;
  
  	conn->max_recv_dlength = BYTE_UNITS *
  			  le16_to_cpu(fw_ddb_entry->iscsi_max_rcv_data_seg_len);
  
  	conn->max_xmit_dlength = BYTE_UNITS *
  			  le16_to_cpu(fw_ddb_entry->iscsi_max_snd_data_seg_len);
  
  	sess->initial_r2t_en =
  			    (BIT_10 & le16_to_cpu(fw_ddb_entry->iscsi_options));
  
  	sess->max_r2t = le16_to_cpu(fw_ddb_entry->iscsi_max_outsnd_r2t);
  
  	sess->imm_data_en = (BIT_11 & le16_to_cpu(fw_ddb_entry->iscsi_options));
  
  	sess->first_burst = BYTE_UNITS *
  			       le16_to_cpu(fw_ddb_entry->iscsi_first_burst_len);
  
  	sess->max_burst = BYTE_UNITS *
  				 le16_to_cpu(fw_ddb_entry->iscsi_max_burst_len);
  
  	sess->time2wait = le16_to_cpu(fw_ddb_entry->iscsi_def_time2wait);
  
  	sess->time2retain = le16_to_cpu(fw_ddb_entry->iscsi_def_time2retain);
  
  	conn->persistent_port = le16_to_cpu(fw_ddb_entry->port);
  
  	sess->tpgt = le32_to_cpu(fw_ddb_entry->tgt_portal_grp);
  
  	options = le16_to_cpu(fw_ddb_entry->options);
  	if (options & DDB_OPT_IPV6_DEVICE)
  		sprintf(ip_addr, "%pI6", fw_ddb_entry->ip_addr);
  	else
  		sprintf(ip_addr, "%pI4", fw_ddb_entry->ip_addr);
  
  	iscsi_set_param(cls_conn, ISCSI_PARAM_TARGET_NAME,
  			(char *)fw_ddb_entry->iscsi_name, buflen);
  	iscsi_set_param(cls_conn, ISCSI_PARAM_INITIATOR_NAME,
  			(char *)ha->name_string, buflen);
  	iscsi_set_param(cls_conn, ISCSI_PARAM_PERSISTENT_ADDRESS,
  			(char *)ip_addr, buflen);
  }
  
  void qla4xxx_update_session_conn_fwddb_param(struct scsi_qla_host *ha,
  					     struct ddb_entry *ddb_entry)
  {
  	struct iscsi_cls_session *cls_sess;
  	struct iscsi_cls_conn *cls_conn;
  	uint32_t ddb_state;
  	dma_addr_t fw_ddb_entry_dma;
  	struct dev_db_entry *fw_ddb_entry;
  
  	fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
  					  &fw_ddb_entry_dma, GFP_KERNEL);
  	if (!fw_ddb_entry) {
  		ql4_printk(KERN_ERR, ha,
  			   "%s: Unable to allocate dma buffer
  ", __func__);
  		goto exit_session_conn_fwddb_param;
  	}
  
  	if (qla4xxx_get_fwddb_entry(ha, ddb_entry->fw_ddb_index, fw_ddb_entry,
  				    fw_ddb_entry_dma, NULL, NULL, &ddb_state,
  				    NULL, NULL, NULL) == QLA_ERROR) {
  		DEBUG2(ql4_printk(KERN_ERR, ha, "scsi%ld: %s: failed "
  				  "get_ddb_entry for fw_ddb_index %d
  ",
  				  ha->host_no, __func__,
  				  ddb_entry->fw_ddb_index));
  		goto exit_session_conn_fwddb_param;
  	}
  
  	cls_sess = ddb_entry->sess;
  
  	cls_conn = ddb_entry->conn;
  
  	/* Update params */
  	qla4xxx_copy_fwddb_param(ha, fw_ddb_entry, cls_sess, cls_conn);
  
  exit_session_conn_fwddb_param:
  	if (fw_ddb_entry)
  		dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
  				  fw_ddb_entry, fw_ddb_entry_dma);
  }

  void qla4xxx_update_session_conn_param(struct scsi_qla_host *ha,
  				       struct ddb_entry *ddb_entry)
  {
  	struct iscsi_cls_session *cls_sess;
  	struct iscsi_cls_conn *cls_conn;
  	struct iscsi_session *sess;
  	struct iscsi_conn *conn;
  	uint32_t ddb_state;
  	dma_addr_t fw_ddb_entry_dma;
  	struct dev_db_entry *fw_ddb_entry;
  
  	fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
  					  &fw_ddb_entry_dma, GFP_KERNEL);
  	if (!fw_ddb_entry) {
  		ql4_printk(KERN_ERR, ha,
  			   "%s: Unable to allocate dma buffer
  ", __func__);

  		goto exit_session_conn_param;

  	}
  
  	if (qla4xxx_get_fwddb_entry(ha, ddb_entry->fw_ddb_index, fw_ddb_entry,
  				    fw_ddb_entry_dma, NULL, NULL, &ddb_state,
  				    NULL, NULL, NULL) == QLA_ERROR) {
  		DEBUG2(ql4_printk(KERN_ERR, ha, "scsi%ld: %s: failed "
  				  "get_ddb_entry for fw_ddb_index %d
  ",
  				  ha->host_no, __func__,
  				  ddb_entry->fw_ddb_index));

  		goto exit_session_conn_param;

  	}
  
  	cls_sess = ddb_entry->sess;
  	sess = cls_sess->dd_data;
  
  	cls_conn = ddb_entry->conn;
  	conn = cls_conn->dd_data;

  	/* Update timers after login */
  	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 params */
  	conn->max_recv_dlength = BYTE_UNITS *
  			  le16_to_cpu(fw_ddb_entry->iscsi_max_rcv_data_seg_len);
  
  	conn->max_xmit_dlength = BYTE_UNITS *
  			  le16_to_cpu(fw_ddb_entry->iscsi_max_snd_data_seg_len);
  
  	sess->initial_r2t_en =
  			    (BIT_10 & le16_to_cpu(fw_ddb_entry->iscsi_options));
  
  	sess->max_r2t = le16_to_cpu(fw_ddb_entry->iscsi_max_outsnd_r2t);
  
  	sess->imm_data_en = (BIT_11 & le16_to_cpu(fw_ddb_entry->iscsi_options));
  
  	sess->first_burst = BYTE_UNITS *
  			       le16_to_cpu(fw_ddb_entry->iscsi_first_burst_len);
  
  	sess->max_burst = BYTE_UNITS *
  				 le16_to_cpu(fw_ddb_entry->iscsi_max_burst_len);
  
  	sess->time2wait = le16_to_cpu(fw_ddb_entry->iscsi_def_time2wait);
  
  	sess->time2retain = le16_to_cpu(fw_ddb_entry->iscsi_def_time2retain);
  
  	sess->tpgt = le32_to_cpu(fw_ddb_entry->tgt_portal_grp);
  
  	memcpy(sess->initiatorname, ha->name_string,
  	       min(sizeof(ha->name_string), sizeof(sess->initiatorname)));

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

  }

  /*
   * Timer routines
   */
  
  static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
  				unsigned long interval)
  {
  	DEBUG(printk("scsi: %s: Starting timer thread for adapter %d
  ",
  		     __func__, ha->host->host_no));
  	init_timer(&ha->timer);
  	ha->timer.expires = jiffies + interval * HZ;
  	ha->timer.data = (unsigned long)ha;
  	ha->timer.function = (void (*)(unsigned long))func;
  	add_timer(&ha->timer);
  	ha->timer_active = 1;
  }
  
  static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
  {
  	del_timer_sync(&ha->timer);
  	ha->timer_active = 0;
  }
  
  /***

   * qla4xxx_mark_device_missing - blocks the session
   * @cls_session: Pointer to the session to be blocked

   * @ddb_entry: Pointer to device database entry
   *

   * This routine marks a device missing and close connection.

   **/

  void qla4xxx_mark_device_missing(struct iscsi_cls_session *cls_session)

  {

  	iscsi_block_session(cls_session);

  }

  /**
   * qla4xxx_mark_all_devices_missing - mark all devices as missing.
   * @ha: Pointer to host adapter structure.
   *
   * This routine marks a device missing and resets the relogin retry count.
   **/
  void qla4xxx_mark_all_devices_missing(struct scsi_qla_host *ha)
  {

  	iscsi_host_for_each_session(ha->host, qla4xxx_mark_device_missing);

  }

  static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
  				       struct ddb_entry *ddb_entry,

  				       struct scsi_cmnd *cmd)

  {
  	struct srb *srb;
  
  	srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
  	if (!srb)
  		return srb;

  	kref_init(&srb->srb_ref);

  	srb->ha = ha;
  	srb->ddb = ddb_entry;
  	srb->cmd = cmd;
  	srb->flags = 0;

  	CMD_SP(cmd) = (void *)srb;

  
  	return srb;
  }
  
  static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
  {
  	struct scsi_cmnd *cmd = srb->cmd;
  
  	if (srb->flags & SRB_DMA_VALID) {

  		scsi_dma_unmap(cmd);

  		srb->flags &= ~SRB_DMA_VALID;
  	}

  	CMD_SP(cmd) = NULL;

  }

  void qla4xxx_srb_compl(struct kref *ref)

  {

  	struct srb *srb = container_of(ref, struct srb, srb_ref);

  	struct scsi_cmnd *cmd = srb->cmd;

  	struct scsi_qla_host *ha = srb->ha;

  
  	qla4xxx_srb_free_dma(ha, srb);
  
  	mempool_free(srb, ha->srb_mempool);
  
  	cmd->scsi_done(cmd);
  }
  
  /**
   * qla4xxx_queuecommand - scsi layer issues scsi command to driver.

   * @host: scsi host

   * @cmd: Pointer to Linux's SCSI command structure

   *
   * Remarks:
   * This routine is invoked by Linux to send a SCSI command to the driver.
   * The mid-level driver tries to ensure that queuecommand never gets
   * invoked concurrently with itself or the interrupt handler (although
   * the interrupt handler may call this routine as part of request-
   * completion handling).   Unfortunely, it sometimes calls the scheduler
   * in interrupt context which is a big NO! NO!.
   **/

  static int qla4xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)

  {

  	struct scsi_qla_host *ha = to_qla_host(host);

  	struct ddb_entry *ddb_entry = cmd->device->hostdata;

  	struct iscsi_cls_session *sess = ddb_entry->sess;

  	struct srb *srb;
  	int rval;

  	if (test_bit(AF_EEH_BUSY, &ha->flags)) {
  		if (test_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags))
  			cmd->result = DID_NO_CONNECT << 16;
  		else
  			cmd->result = DID_REQUEUE << 16;
  		goto qc_fail_command;
  	}

  	if (!sess) {
  		cmd->result = DID_IMM_RETRY << 16;
  		goto qc_fail_command;
  	}
  
  	rval = iscsi_session_chkready(sess);
  	if (rval) {
  		cmd->result = rval;
  		goto qc_fail_command;
  	}

  	if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
  	    test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
  	    test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
  	    test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
  	    test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
  	    !test_bit(AF_ONLINE, &ha->flags) ||

  	    !test_bit(AF_LINK_UP, &ha->flags) ||

  	    test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))

  		goto qc_host_busy;

  	srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd);

  	if (!srb)

  		goto qc_host_busy;

  
  	rval = qla4xxx_send_command_to_isp(ha, srb);
  	if (rval != QLA_SUCCESS)
  		goto qc_host_busy_free_sp;

  	return 0;
  
  qc_host_busy_free_sp:
  	qla4xxx_srb_free_dma(ha, srb);
  	mempool_free(srb, ha->srb_mempool);

  qc_host_busy:
  	return SCSI_MLQUEUE_HOST_BUSY;
  
  qc_fail_command:

  	cmd->scsi_done(cmd);

  
  	return 0;
  }
  
  /**
   * qla4xxx_mem_free - frees memory allocated to adapter
   * @ha: Pointer to host adapter structure.
   *
   * Frees memory previously allocated by qla4xxx_mem_alloc
   **/
  static void qla4xxx_mem_free(struct scsi_qla_host *ha)
  {
  	if (ha->queues)
  		dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
  				  ha->queues_dma);
  
  	ha->queues_len = 0;
  	ha->queues = NULL;
  	ha->queues_dma = 0;
  	ha->request_ring = NULL;
  	ha->request_dma = 0;
  	ha->response_ring = NULL;
  	ha->response_dma = 0;
  	ha->shadow_regs = NULL;
  	ha->shadow_regs_dma = 0;
  
  	/* Free srb pool. */
  	if (ha->srb_mempool)
  		mempool_destroy(ha->srb_mempool);
  
  	ha->srb_mempool = NULL;

  	if (ha->chap_dma_pool)
  		dma_pool_destroy(ha->chap_dma_pool);

  	if (ha->chap_list)
  		vfree(ha->chap_list);
  	ha->chap_list = NULL;

  	if (ha->fw_ddb_dma_pool)
  		dma_pool_destroy(ha->fw_ddb_dma_pool);

  	/* release io space registers  */

  	if (is_qla8022(ha)) {
  		if (ha->nx_pcibase)
  			iounmap(
  			    (struct device_reg_82xx __iomem *)ha->nx_pcibase);

  	} else if (ha->reg)

  		iounmap(ha->reg);
  	pci_release_regions(ha->pdev);
  }
  
  /**
   * qla4xxx_mem_alloc - allocates memory for use by adapter.
   * @ha: Pointer to host adapter structure
   *
   * Allocates DMA memory for request and response queues. Also allocates memory
   * for srbs.
   **/
  static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
  {
  	unsigned long align;
  
  	/* Allocate contiguous block of DMA memory for queues. */
  	ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
  			  (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
  			  sizeof(struct shadow_regs) +
  			  MEM_ALIGN_VALUE +
  			  (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
  	ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
  					&ha->queues_dma, GFP_KERNEL);
  	if (ha->queues == NULL) {

  		ql4_printk(KERN_WARNING, ha,
  		    "Memory Allocation failed - queues.
  ");

  
  		goto mem_alloc_error_exit;
  	}
  	memset(ha->queues, 0, ha->queues_len);
  
  	/*
  	 * As per RISC alignment requirements -- the bus-address must be a
  	 * multiple of the request-ring size (in bytes).
  	 */
  	align = 0;
  	if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
  		align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
  					   (MEM_ALIGN_VALUE - 1));
  
  	/* Update request and response queue pointers. */
  	ha->request_dma = ha->queues_dma + align;
  	ha->request_ring = (struct queue_entry *) (ha->queues + align);
  	ha->response_dma = ha->queues_dma + align +
  		(REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
  	ha->response_ring = (struct queue_entry *) (ha->queues + align +
  						    (REQUEST_QUEUE_DEPTH *
  						     QUEUE_SIZE));
  	ha->shadow_regs_dma = ha->queues_dma + align +
  		(REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
  		(RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
  	ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
  						  (REQUEST_QUEUE_DEPTH *
  						   QUEUE_SIZE) +
  						  (RESPONSE_QUEUE_DEPTH *
  						   QUEUE_SIZE));
  
  	/* Allocate memory for srb pool. */
  	ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
  					 mempool_free_slab, srb_cachep);
  	if (ha->srb_mempool == NULL) {

  		ql4_printk(KERN_WARNING, ha,
  		    "Memory Allocation failed - SRB Pool.
  ");

  
  		goto mem_alloc_error_exit;
  	}

  	ha->chap_dma_pool = dma_pool_create("ql4_chap", &ha->pdev->dev,
  					    CHAP_DMA_BLOCK_SIZE, 8, 0);
  
  	if (ha->chap_dma_pool == NULL) {
  		ql4_printk(KERN_WARNING, ha,
  		    "%s: chap_dma_pool allocation failed..
  ", __func__);
  		goto mem_alloc_error_exit;
  	}

  	ha->fw_ddb_dma_pool = dma_pool_create("ql4_fw_ddb", &ha->pdev->dev,
  					      DDB_DMA_BLOCK_SIZE, 8, 0);
  
  	if (ha->fw_ddb_dma_pool == NULL) {
  		ql4_printk(KERN_WARNING, ha,
  			   "%s: fw_ddb_dma_pool allocation failed..
  ",
  			   __func__);
  		goto mem_alloc_error_exit;
  	}

  	return QLA_SUCCESS;
  
  mem_alloc_error_exit:
  	qla4xxx_mem_free(ha);
  	return QLA_ERROR;
  }
  
  /**

   * qla4_8xxx_check_fw_alive  - Check firmware health
   * @ha: Pointer to host adapter structure.
   *
   * Context: Interrupt
   **/

  static int qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)

  {

  	uint32_t fw_heartbeat_counter;
  	int status = QLA_SUCCESS;

  
  	fw_heartbeat_counter = qla4_8xxx_rd_32(ha, QLA82XX_PEG_ALIVE_COUNTER);

  	/* If PEG_ALIVE_COUNTER is 0xffffffff, AER/EEH is in progress, ignore */
  	if (fw_heartbeat_counter == 0xffffffff) {
  		DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Device in frozen "
  		    "state, QLA82XX_PEG_ALIVE_COUNTER is 0xffffffff
  ",
  		    ha->host_no, __func__));

  		return status;

  	}

  
  	if (ha->fw_heartbeat_counter == fw_heartbeat_counter) {
  		ha->seconds_since_last_heartbeat++;
  		/* FW not alive after 2 seconds */
  		if (ha->seconds_since_last_heartbeat == 2) {
  			ha->seconds_since_last_heartbeat = 0;

  
  			ql4_printk(KERN_INFO, ha,
  				   "scsi(%ld): %s, Dumping hw/fw registers:
   "
  				   " PEG_HALT_STATUS1: 0x%x, PEG_HALT_STATUS2:"
  				   " 0x%x,
   PEG_NET_0_PC: 0x%x, PEG_NET_1_PC:"
  				   " 0x%x,
   PEG_NET_2_PC: 0x%x, PEG_NET_3_PC:"
  				   " 0x%x,
   PEG_NET_4_PC: 0x%x
  ",

  				   ha->host_no, __func__,
  				   qla4_8xxx_rd_32(ha,
  						   QLA82XX_PEG_HALT_STATUS1),

  				   qla4_8xxx_rd_32(ha,
  						   QLA82XX_PEG_HALT_STATUS2),
  				   qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_0 +
  						   0x3c),
  				   qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_1 +
  						   0x3c),
  				   qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_2 +
  						   0x3c),
  				   qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_3 +
  						   0x3c),
  				   qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_4 +
  						   0x3c));

  			status = QLA_ERROR;

  		}

  	} else
  		ha->seconds_since_last_heartbeat = 0;

  	ha->fw_heartbeat_counter = fw_heartbeat_counter;

  	return status;

  }
  
  /**
   * qla4_8xxx_watchdog - Poll dev state
   * @ha: Pointer to host adapter structure.
   *
   * Context: Interrupt
   **/
  void qla4_8xxx_watchdog(struct scsi_qla_host *ha)
  {

  	uint32_t dev_state, halt_status;

  
  	/* don't poll if reset is going on */

  	if (!(test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
  	    test_bit(DPC_RESET_HA, &ha->dpc_flags) ||

  	    test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags))) {

  		dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);

  		if (dev_state == QLA82XX_DEV_NEED_RESET &&
  		    !test_bit(DPC_RESET_HA, &ha->dpc_flags)) {

  			if (!ql4xdontresethba) {
  				ql4_printk(KERN_INFO, ha, "%s: HW State: "
  				    "NEED RESET!
  ", __func__);
  				set_bit(DPC_RESET_HA, &ha->dpc_flags);
  				qla4xxx_wake_dpc(ha);

  			}

  		} else if (dev_state == QLA82XX_DEV_NEED_QUIESCENT &&
  		    !test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {

  			ql4_printk(KERN_INFO, ha, "%s: HW State: NEED QUIES!
  ",
  			    __func__);

  			set_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags);
  			qla4xxx_wake_dpc(ha);
  		} else  {
  			/* Check firmware health */

  			if (qla4_8xxx_check_fw_alive(ha)) {
  				halt_status = qla4_8xxx_rd_32(ha,
  						QLA82XX_PEG_HALT_STATUS1);
  
  				/* Since we cannot change dev_state in interrupt
  				 * context, set appropriate DPC flag then wakeup
  				 * DPC */
  				if (halt_status & HALT_STATUS_UNRECOVERABLE)
  					set_bit(DPC_HA_UNRECOVERABLE,
  						&ha->dpc_flags);
  				else {
  					ql4_printk(KERN_INFO, ha, "%s: detect "
  						   "abort needed!
  ", __func__);
  					set_bit(DPC_RESET_HA, &ha->dpc_flags);
  				}
  				qla4xxx_mailbox_premature_completion(ha);
  				qla4xxx_wake_dpc(ha);
  			}

  		}
  	}
  }

  void qla4xxx_check_relogin_flash_ddb(struct iscsi_cls_session *cls_sess)
  {
  	struct iscsi_session *sess;
  	struct ddb_entry *ddb_entry;
  	struct scsi_qla_host *ha;
  
  	sess = cls_sess->dd_data;
  	ddb_entry = sess->dd_data;
  	ha = ddb_entry->ha;
  
  	if (!(ddb_entry->ddb_type == FLASH_DDB))
  		return;
  
  	if (adapter_up(ha) && !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
  	    !iscsi_is_session_online(cls_sess)) {
  		if (atomic_read(&ddb_entry->retry_relogin_timer) !=
  		    INVALID_ENTRY) {
  			if (atomic_read(&ddb_entry->retry_relogin_timer) ==
  					0) {
  				atomic_set(&ddb_entry->retry_relogin_timer,
  					   INVALID_ENTRY);
  				set_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags);
  				set_bit(DF_RELOGIN, &ddb_entry->flags);
  				DEBUG2(ql4_printk(KERN_INFO, ha,
  				       "%s: index [%d] login device
  ",
  					__func__, ddb_entry->fw_ddb_index));
  			} else
  				atomic_dec(&ddb_entry->retry_relogin_timer);
  		}
  	}
  
  	/* Wait for relogin to timeout */
  	if (atomic_read(&ddb_entry->relogin_timer) &&
  	    (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
  		/*
  		 * If the relogin times out and the device is
  		 * still NOT ONLINE then try and relogin again.
  		 */
  		if (!iscsi_is_session_online(cls_sess)) {
  			/* Reset retry relogin timer */
  			atomic_inc(&ddb_entry->relogin_retry_count);
  			DEBUG2(ql4_printk(KERN_INFO, ha,
  				"%s: index[%d] relogin timed out-retrying"
  				" relogin (%d), retry (%d)
  ", __func__,
  				ddb_entry->fw_ddb_index,
  				atomic_read(&ddb_entry->relogin_retry_count),
  				ddb_entry->default_time2wait + 4));
  			set_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags);
  			atomic_set(&ddb_entry->retry_relogin_timer,
  				   ddb_entry->default_time2wait + 4);
  		}
  	}
  }

  /**

   * qla4xxx_timer - checks every second for work to do.
   * @ha: Pointer to host adapter structure.
   **/
  static void qla4xxx_timer(struct scsi_qla_host *ha)
  {

  	int start_dpc = 0;

  	uint16_t w;

  	iscsi_host_for_each_session(ha->host, qla4xxx_check_relogin_flash_ddb);

  	/* If we are in the middle of AER/EEH processing
  	 * skip any processing and reschedule the timer
  	 */
  	if (test_bit(AF_EEH_BUSY, &ha->flags)) {
  		mod_timer(&ha->timer, jiffies + HZ);
  		return;
  	}
  
  	/* Hardware read to trigger an EEH error during mailbox waits. */
  	if (!pci_channel_offline(ha->pdev))
  		pci_read_config_word(ha->pdev, PCI_VENDOR_ID, &w);

  	if (is_qla8022(ha)) {
  		qla4_8xxx_watchdog(ha);
  	}

  	if (!is_qla8022(ha)) {
  		/* Check for heartbeat interval. */
  		if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
  		    ha->heartbeat_interval != 0) {
  			ha->seconds_since_last_heartbeat++;
  			if (ha->seconds_since_last_heartbeat >
  			    ha->heartbeat_interval + 2)
  				set_bit(DPC_RESET_HA, &ha->dpc_flags);
  		}

  	}

  	/* Wakeup the dpc routine for this adapter, if needed. */

  	if (start_dpc ||

  	     test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
  	     test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
  	     test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||

  	     test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||

  	     test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
  	     test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||

  	     test_bit(DPC_LINK_CHANGED, &ha->dpc_flags) ||

  	     test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
  	     test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||

  	     test_bit(DPC_AEN, &ha->dpc_flags)) {

  		DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
  			      " - dpc flags = 0x%lx
  ",
  			      ha->host_no, __func__, ha->dpc_flags));

  		qla4xxx_wake_dpc(ha);

  	}
  
  	/* Reschedule timer thread to call us back in one second */
  	mod_timer(&ha->timer, jiffies + HZ);
  
  	DEBUG2(ha->seconds_since_last_intr++);
  }
  
  /**
   * qla4xxx_cmd_wait - waits for all outstanding commands to complete
   * @ha: Pointer to host adapter structure.
   *
   * This routine stalls the driver until all outstanding commands are returned.
   * Caller must release the Hardware Lock prior to calling this routine.
   **/
  static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
  {
  	uint32_t index = 0;

  	unsigned long flags;
  	struct scsi_cmnd *cmd;

  	unsigned long wtime = jiffies + (WAIT_CMD_TOV * HZ);
  
  	DEBUG2(ql4_printk(KERN_INFO, ha, "Wait up to %d seconds for cmds to "
  	    "complete
  ", WAIT_CMD_TOV));
  
  	while (!time_after_eq(jiffies, wtime)) {

  		spin_lock_irqsave(&ha->hardware_lock, flags);
  		/* Find a command that hasn't completed. */
  		for (index = 0; index < ha->host->can_queue; index++) {
  			cmd = scsi_host_find_tag(ha->host, index);

  			/*
  			 * We cannot just check if the index is valid,
  			 * becase if we are run from the scsi eh, then
  			 * the scsi/block layer is going to prevent
  			 * the tag from being released.
  			 */
  			if (cmd != NULL && CMD_SP(cmd))

  				break;
  		}
  		spin_unlock_irqrestore(&ha->hardware_lock, flags);
  
  		/* If No Commands are pending, wait is complete */

  		if (index == ha->host->can_queue)
  			return QLA_SUCCESS;

  		msleep(1000);
  	}
  	/* If we timed out on waiting for commands to come back
  	 * return ERROR. */
  	return QLA_ERROR;

  }

  int qla4xxx_hw_reset(struct scsi_qla_host *ha)

  {

  	uint32_t ctrl_status;

  	unsigned long flags = 0;
  
  	DEBUG2(printk(KERN_ERR "scsi%ld: %s
  ", ha->host_no, __func__));

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

  	spin_lock_irqsave(&ha->hardware_lock, flags);
  
  	/*
  	 * If the SCSI Reset Interrupt bit is set, clear it.
  	 * Otherwise, the Soft Reset won't work.
  	 */
  	ctrl_status = readw(&ha->reg->ctrl_status);
  	if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
  		writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
  
  	/* Issue Soft Reset */
  	writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
  	readl(&ha->reg->ctrl_status);
  
  	spin_unlock_irqrestore(&ha->hardware_lock, flags);

  	return QLA_SUCCESS;

  }
  
  /**
   * qla4xxx_soft_reset - performs soft reset.
   * @ha: Pointer to host adapter structure.
   **/
  int qla4xxx_soft_reset(struct scsi_qla_host *ha)
  {
  	uint32_t max_wait_time;
  	unsigned long flags = 0;

  	int status;

  	uint32_t ctrl_status;

  	status = qla4xxx_hw_reset(ha);
  	if (status != QLA_SUCCESS)
  		return status;

  	status = QLA_ERROR;

  	/* Wait until the Network Reset Intr bit is cleared */
  	max_wait_time = RESET_INTR_TOV;
  	do {
  		spin_lock_irqsave(&ha->hardware_lock, flags);
  		ctrl_status = readw(&ha->reg->ctrl_status);
  		spin_unlock_irqrestore(&ha->hardware_lock, flags);
  
  		if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
  			break;
  
  		msleep(1000);
  	} while ((--max_wait_time));
  
  	if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
  		DEBUG2(printk(KERN_WARNING
  			      "scsi%ld: Network Reset Intr not cleared by "
  			      "Network function, clearing it now!
  ",
  			      ha->host_no));
  		spin_lock_irqsave(&ha->hardware_lock, flags);
  		writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
  		readl(&ha->reg->ctrl_status);
  		spin_unlock_irqrestore(&ha->hardware_lock, flags);
  	}
  
  	/* Wait until the firmware tells us the Soft Reset is done */
  	max_wait_time = SOFT_RESET_TOV;
  	do {
  		spin_lock_irqsave(&ha->hardware_lock, flags);
  		ctrl_status = readw(&ha->reg->ctrl_status);
  		spin_unlock_irqrestore(&ha->hardware_lock, flags);
  
  		if ((ctrl_status & CSR_SOFT_RESET) == 0) {
  			status = QLA_SUCCESS;
  			break;
  		}
  
  		msleep(1000);
  	} while ((--max_wait_time));
  
  	/*
  	 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
  	 * after the soft reset has taken place.
  	 */
  	spin_lock_irqsave(&ha->hardware_lock, flags);
  	ctrl_status = readw(&ha->reg->ctrl_status);
  	if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
  		writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
  		readl(&ha->reg->ctrl_status);
  	}
  	spin_unlock_irqrestore(&ha->hardware_lock, flags);
  
  	/* If soft reset fails then most probably the bios on other
  	 * function is also enabled.
  	 * Since the initialization is sequential the other fn
  	 * wont be able to acknowledge the soft reset.
  	 * Issue a force soft reset to workaround this scenario.
  	 */
  	if (max_wait_time == 0) {
  		/* Issue Force Soft Reset */
  		spin_lock_irqsave(&ha->hardware_lock, flags);
  		writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
  		readl(&ha->reg->ctrl_status);
  		spin_unlock_irqrestore(&ha->hardware_lock, flags);
  		/* Wait until the firmware tells us the Soft Reset is done */
  		max_wait_time = SOFT_RESET_TOV;
  		do {
  			spin_lock_irqsave(&ha->hardware_lock, flags);
  			ctrl_status = readw(&ha->reg->ctrl_status);
  			spin_unlock_irqrestore(&ha->hardware_lock, flags);
  
  			if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
  				status = QLA_SUCCESS;
  				break;
  			}
  
  			msleep(1000);
  		} while ((--max_wait_time));
  	}
  
  	return status;
  }
  
  /**

   * qla4xxx_abort_active_cmds - returns all outstanding i/o requests to O.S.

   * @ha: Pointer to host adapter structure.

   * @res: returned scsi status

   *
   * This routine is called just prior to a HARD RESET to return all
   * outstanding commands back to the Operating System.
   * Caller should make sure that the following locks are released
   * before this calling routine: Hardware lock, and io_request_lock.
   **/

  static void qla4xxx_abort_active_cmds(struct scsi_qla_host *ha, int res)

  {
  	struct srb *srb;
  	int i;
  	unsigned long flags;
  
  	spin_lock_irqsave(&ha->hardware_lock, flags);
  	for (i = 0; i < ha->host->can_queue; i++) {
  		srb = qla4xxx_del_from_active_array(ha, i);
  		if (srb != NULL) {

  			srb->cmd->result = res;

  			kref_put(&srb->srb_ref, qla4xxx_srb_compl);

  		}
  	}
  	spin_unlock_irqrestore(&ha->hardware_lock, flags);

  }

  void qla4xxx_dead_adapter_cleanup(struct scsi_qla_host *ha)
  {
  	clear_bit(AF_ONLINE, &ha->flags);
  
  	/* Disable the board */
  	ql4_printk(KERN_INFO, ha, "Disabling the board
  ");

  
  	qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
  	qla4xxx_mark_all_devices_missing(ha);
  	clear_bit(AF_INIT_DONE, &ha->flags);
  }

  static void qla4xxx_fail_session(struct iscsi_cls_session *cls_session)
  {
  	struct iscsi_session *sess;
  	struct ddb_entry *ddb_entry;
  
  	sess = cls_session->dd_data;
  	ddb_entry = sess->dd_data;
  	ddb_entry->fw_ddb_device_state = DDB_DS_SESSION_FAILED;

  
  	if (ddb_entry->ddb_type == FLASH_DDB)
  		iscsi_block_session(ddb_entry->sess);
  	else
  		iscsi_session_failure(cls_session->dd_data,
  				      ISCSI_ERR_CONN_FAILED);

  }

  /**

   * qla4xxx_recover_adapter - recovers adapter after a fatal error
   * @ha: Pointer to host adapter structure.

   **/

  static int qla4xxx_recover_adapter(struct scsi_qla_host *ha)

  {

  	int status = QLA_ERROR;
  	uint8_t reset_chip = 0;

  	uint32_t dev_state;

  	unsigned long wait;

  
  	/* Stall incoming I/O until we are done */

  	scsi_block_requests(ha->host);

  	clear_bit(AF_ONLINE, &ha->flags);

  	clear_bit(AF_LINK_UP, &ha->flags);

  	DEBUG2(ql4_printk(KERN_INFO, ha, "%s: adapter OFFLINE
  ", __func__));

  	set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);

  	iscsi_host_for_each_session(ha->host, qla4xxx_fail_session);

  	if (test_bit(DPC_RESET_HA, &ha->dpc_flags))
  		reset_chip = 1;

  	/* For the DPC_RESET_HA_INTR case (ISP-4xxx specific)
  	 * do not reset adapter, jump to initialize_adapter */
  	if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
  		status = QLA_SUCCESS;
  		goto recover_ha_init_adapter;
  	}

  	/* For the ISP-82xx adapter, issue a stop_firmware if invoked
  	 * from eh_host_reset or ioctl module */
  	if (is_qla8022(ha) && !reset_chip &&
  	    test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags)) {
  
  		DEBUG2(ql4_printk(KERN_INFO, ha,
  		    "scsi%ld: %s - Performing stop_firmware...
  ",
  		    ha->host_no, __func__));
  		status = ha->isp_ops->reset_firmware(ha);
  		if (status == QLA_SUCCESS) {

  			if (!test_bit(AF_FW_RECOVERY, &ha->flags))
  				qla4xxx_cmd_wait(ha);

  			ha->isp_ops->disable_intrs(ha);
  			qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
  			qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
  		} else {
  			/* If the stop_firmware fails then
  			 * reset the entire chip */
  			reset_chip = 1;
  			clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
  			set_bit(DPC_RESET_HA, &ha->dpc_flags);
  		}
  	}

  	/* Issue full chip reset if recovering from a catastrophic error,
  	 * or if stop_firmware fails for ISP-82xx.
  	 * This is the default case for ISP-4xxx */
  	if (!is_qla8022(ha) || reset_chip) {

  		if (!is_qla8022(ha))
  			goto chip_reset;
  
  		/* Check if 82XX firmware is alive or not
  		 * We may have arrived here from NEED_RESET
  		 * detection only */
  		if (test_bit(AF_FW_RECOVERY, &ha->flags))
  			goto chip_reset;
  
  		wait = jiffies + (FW_ALIVE_WAIT_TOV * HZ);
  		while (time_before(jiffies, wait)) {
  			if (qla4_8xxx_check_fw_alive(ha)) {
  				qla4xxx_mailbox_premature_completion(ha);
  				break;
  			}
  
  			set_current_state(TASK_UNINTERRUPTIBLE);
  			schedule_timeout(HZ);
  		}

  		if (!test_bit(AF_FW_RECOVERY, &ha->flags))
  			qla4xxx_cmd_wait(ha);

  chip_reset:

  		qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
  		qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
  		DEBUG2(ql4_printk(KERN_INFO, ha,
  		    "scsi%ld: %s - Performing chip reset..
  ",
  		    ha->host_no, __func__));
  		status = ha->isp_ops->reset_chip(ha);
  	}

  
  	/* Flush any pending ddb changed AENs */
  	qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);

  recover_ha_init_adapter:
  	/* Upon successful firmware/chip reset, re-initialize the adapter */

  	if (status == QLA_SUCCESS) {

  		/* For ISP-4xxx, force function 1 to always initialize
  		 * before function 3 to prevent both funcions from
  		 * stepping on top of the other */
  		if (!is_qla8022(ha) && (ha->mac_index == 3))
  			ssleep(6);
  
  		/* NOTE: AF_ONLINE flag set upon successful completion of
  		 *       qla4xxx_initialize_adapter */

  		status = qla4xxx_initialize_adapter(ha, RESET_ADAPTER);

  	}

  	/* Retry failed adapter initialization, if necessary
  	 * Do not retry initialize_adapter for RESET_HA_INTR (ISP-4xxx specific)
  	 * case to prevent ping-pong resets between functions */
  	if (!test_bit(AF_ONLINE, &ha->flags) &&
  	    !test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {

  		/* Adapter initialization failed, see if we can retry

  		 * resetting the ha.
  		 * Since we don't want to block the DPC for too long
  		 * with multiple resets in the same thread,
  		 * utilize DPC to retry */

  		if (is_qla8022(ha)) {
  			qla4_8xxx_idc_lock(ha);
  			dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
  			qla4_8xxx_idc_unlock(ha);
  			if (dev_state == QLA82XX_DEV_FAILED) {
  				ql4_printk(KERN_INFO, ha, "%s: don't retry "
  					   "recover adapter. H/W is in Failed "
  					   "state
  ", __func__);
  				qla4xxx_dead_adapter_cleanup(ha);
  				clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
  				clear_bit(DPC_RESET_HA, &ha->dpc_flags);
  				clear_bit(DPC_RESET_HA_FW_CONTEXT,
  						&ha->dpc_flags);
  				status = QLA_ERROR;
  
  				goto exit_recover;
  			}
  		}

  		if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
  			ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
  			DEBUG2(printk("scsi%ld: recover adapter - retrying "
  				      "(%d) more times
  ", ha->host_no,
  				      ha->retry_reset_ha_cnt));
  			set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
  			status = QLA_ERROR;
  		} else {
  			if (ha->retry_reset_ha_cnt > 0) {
  				/* Schedule another Reset HA--DPC will retry */
  				ha->retry_reset_ha_cnt--;
  				DEBUG2(printk("scsi%ld: recover adapter - "
  					      "retry remaining %d
  ",
  					      ha->host_no,
  					      ha->retry_reset_ha_cnt));
  				status = QLA_ERROR;
  			}
  
  			if (ha->retry_reset_ha_cnt == 0) {
  				/* Recover adapter retries have been exhausted.
  				 * Adapter DEAD */
  				DEBUG2(printk("scsi%ld: recover adapter "
  					      "failed - board disabled
  ",
  					      ha->host_no));

  				qla4xxx_dead_adapter_cleanup(ha);

  				clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
  				clear_bit(DPC_RESET_HA, &ha->dpc_flags);

  				clear_bit(DPC_RESET_HA_FW_CONTEXT,

  					  &ha->dpc_flags);
  				status = QLA_ERROR;
  			}
  		}
  	} else {
  		clear_bit(DPC_RESET_HA, &ha->dpc_flags);

  		clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);

  		clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
  	}

  exit_recover:

  	ha->adapter_error_count++;

  	if (test_bit(AF_ONLINE, &ha->flags))
  		ha->isp_ops->enable_intrs(ha);
  
  	scsi_unblock_requests(ha->host);
  
  	clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
  	DEBUG2(printk("scsi%ld: recover adapter: %s
  ", ha->host_no,

  	    status == QLA_ERROR ? "FAILED" : "SUCCEEDED"));

  	return status;
  }

  static void qla4xxx_relogin_devices(struct iscsi_cls_session *cls_session)

  {

  	struct iscsi_session *sess;
  	struct ddb_entry *ddb_entry;
  	struct scsi_qla_host *ha;

  	sess = cls_session->dd_data;
  	ddb_entry = sess->dd_data;
  	ha = ddb_entry->ha;
  	if (!iscsi_is_session_online(cls_session)) {
  		if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) {
  			ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ddb[%d]"
  				   " unblock session
  ", ha->host_no, __func__,
  				   ddb_entry->fw_ddb_index);
  			iscsi_unblock_session(ddb_entry->sess);
  		} else {
  			/* Trigger relogin */

  			if (ddb_entry->ddb_type == FLASH_DDB) {
  				if (!test_bit(DF_RELOGIN, &ddb_entry->flags))
  					qla4xxx_arm_relogin_timer(ddb_entry);
  			} else
  				iscsi_session_failure(cls_session->dd_data,
  						      ISCSI_ERR_CONN_FAILED);

  		}
  	}
  }

  int qla4xxx_unblock_flash_ddb(struct iscsi_cls_session *cls_session)
  {
  	struct iscsi_session *sess;
  	struct ddb_entry *ddb_entry;
  	struct scsi_qla_host *ha;
  
  	sess = cls_session->dd_data;
  	ddb_entry = sess->dd_data;
  	ha = ddb_entry->ha;
  	ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ddb[%d]"
  		   " unblock session
  ", ha->host_no, __func__,
  		   ddb_entry->fw_ddb_index);
  
  	iscsi_unblock_session(ddb_entry->sess);
  
  	/* Start scan target */
  	if (test_bit(AF_ONLINE, &ha->flags)) {
  		ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ddb[%d]"
  			   " start scan
  ", ha->host_no, __func__,
  			   ddb_entry->fw_ddb_index);
  		scsi_queue_work(ha->host, &ddb_entry->sess->scan_work);
  	}
  	return QLA_SUCCESS;
  }
  
  int qla4xxx_unblock_ddb(struct iscsi_cls_session *cls_session)
  {
  	struct iscsi_session *sess;
  	struct ddb_entry *ddb_entry;
  	struct scsi_qla_host *ha;
  
  	sess = cls_session->dd_data;
  	ddb_entry = sess->dd_data;
  	ha = ddb_entry->ha;
  	ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ddb[%d]"
  		   " unblock user space session
  ", ha->host_no, __func__,
  		   ddb_entry->fw_ddb_index);
  	iscsi_conn_start(ddb_entry->conn);
  	iscsi_conn_login_event(ddb_entry->conn,
  			       ISCSI_CONN_STATE_LOGGED_IN);
  
  	return QLA_SUCCESS;
  }

  static void qla4xxx_relogin_all_devices(struct scsi_qla_host *ha)
  {
  	iscsi_host_for_each_session(ha->host, qla4xxx_relogin_devices);
  }

  static void qla4xxx_relogin_flash_ddb(struct iscsi_cls_session *cls_sess)
  {
  	uint16_t relogin_timer;
  	struct iscsi_session *sess;
  	struct ddb_entry *ddb_entry;
  	struct scsi_qla_host *ha;
  
  	sess = cls_sess->dd_data;
  	ddb_entry = sess->dd_data;
  	ha = ddb_entry->ha;
  
  	relogin_timer = max(ddb_entry->default_relogin_timeout,
  			    (uint16_t)RELOGIN_TOV);
  	atomic_set(&ddb_entry->relogin_timer, relogin_timer);
  
  	DEBUG2(ql4_printk(KERN_INFO, ha,
  			  "scsi%ld: Relogin index [%d]. TOV=%d
  ", ha->host_no,
  			  ddb_entry->fw_ddb_index, relogin_timer));
  
  	qla4xxx_login_flash_ddb(cls_sess);
  }
  
  static void qla4xxx_dpc_relogin(struct iscsi_cls_session *cls_sess)
  {
  	struct iscsi_session *sess;
  	struct ddb_entry *ddb_entry;
  	struct scsi_qla_host *ha;
  
  	sess = cls_sess->dd_data;
  	ddb_entry = sess->dd_data;
  	ha = ddb_entry->ha;
  
  	if (!(ddb_entry->ddb_type == FLASH_DDB))
  		return;
  
  	if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
  	    !iscsi_is_session_online(cls_sess)) {
  		DEBUG2(ql4_printk(KERN_INFO, ha,
  				  "relogin issued
  "));
  		qla4xxx_relogin_flash_ddb(cls_sess);
  	}
  }

  void qla4xxx_wake_dpc(struct scsi_qla_host *ha)
  {

  	if (ha->dpc_thread)

  		queue_work(ha->dpc_thread, &ha->dpc_work);

  }

  /**
   * qla4xxx_do_dpc - dpc routine
   * @data: in our case pointer to adapter structure
   *
   * This routine is a task that is schedule by the interrupt handler
   * to perform the background processing for interrupts.  We put it
   * on a task queue that is consumed whenever the scheduler runs; that's
   * so you can do anything (i.e. put the process to sleep etc).  In fact,
   * the mid-level tries to sleep when it reaches the driver threshold
   * "host->can_queue". This can cause a panic if we were in our interrupt code.
   **/

  static void qla4xxx_do_dpc(struct work_struct *work)

  {

  	struct scsi_qla_host *ha =
  		container_of(work, struct scsi_qla_host, dpc_work);

  	int status = QLA_ERROR;

  	DEBUG2(printk("scsi%ld: %s: DPC handler waking up."

  	    "flags = 0x%08lx, dpc_flags = 0x%08lx
  ",
  	    ha->host_no, __func__, ha->flags, ha->dpc_flags))

  
  	/* Initialization not yet finished. Don't do anything yet. */
  	if (!test_bit(AF_INIT_DONE, &ha->flags))

  		return;

  	if (test_bit(AF_EEH_BUSY, &ha->flags)) {
  		DEBUG2(printk(KERN_INFO "scsi%ld: %s: flags = %lx
  ",
  		    ha->host_no, __func__, ha->flags));

  		return;

  	}

  	if (is_qla8022(ha)) {
  		if (test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags)) {
  			qla4_8xxx_idc_lock(ha);
  			qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
  			    QLA82XX_DEV_FAILED);
  			qla4_8xxx_idc_unlock(ha);
  			ql4_printk(KERN_INFO, ha, "HW State: FAILED
  ");
  			qla4_8xxx_device_state_handler(ha);
  		}
  		if (test_and_clear_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
  			qla4_8xxx_need_qsnt_handler(ha);
  		}
  	}
  
  	if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) &&
  	    (test_bit(DPC_RESET_HA, &ha->dpc_flags) ||

  	    test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||

  	    test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))) {
  		if (ql4xdontresethba) {
  			DEBUG2(printk("scsi%ld: %s: Don't Reset HBA
  ",
  			    ha->host_no, __func__));
  			clear_bit(DPC_RESET_HA, &ha->dpc_flags);
  			clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
  			clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
  			goto dpc_post_reset_ha;
  		}
  		if (test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
  		    test_bit(DPC_RESET_HA, &ha->dpc_flags))
  			qla4xxx_recover_adapter(ha);

  		if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {

  			uint8_t wait_time = RESET_INTR_TOV;

  			while ((readw(&ha->reg->ctrl_status) &
  				(CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
  				if (--wait_time == 0)
  					break;

  				msleep(1000);

  			}

  			if (wait_time == 0)
  				DEBUG2(printk("scsi%ld: %s: SR|FSR "
  					      "bit not cleared-- resetting
  ",
  					      ha->host_no, __func__));

  			qla4xxx_abort_active_cmds(ha, DID_RESET << 16);

  			if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
  				qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);

  				status = qla4xxx_recover_adapter(ha);

  			}
  			clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
  			if (status == QLA_SUCCESS)

  				ha->isp_ops->enable_intrs(ha);

  		}
  	}

  dpc_post_reset_ha:

  	/* ---- process AEN? --- */
  	if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
  		qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
  
  	/* ---- Get DHCP IP Address? --- */
  	if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
  		qla4xxx_get_dhcp_ip_address(ha);

  	/* ---- relogin device? --- */
  	if (adapter_up(ha) &&
  	    test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
  		iscsi_host_for_each_session(ha->host, qla4xxx_dpc_relogin);
  	}

  	/* ---- link change? --- */
  	if (test_and_clear_bit(DPC_LINK_CHANGED, &ha->dpc_flags)) {
  		if (!test_bit(AF_LINK_UP, &ha->flags)) {
  			/* ---- link down? --- */

  			qla4xxx_mark_all_devices_missing(ha);

  		} else {
  			/* ---- link up? --- *
  			 * F/W will auto login to all devices ONLY ONCE after
  			 * link up during driver initialization and runtime
  			 * fatal error recovery.  Therefore, the driver must
  			 * manually relogin to devices when recovering from
  			 * connection failures, logouts, expired KATO, etc. */

  			if (test_and_clear_bit(AF_BUILD_DDB_LIST, &ha->flags)) {
  				qla4xxx_build_ddb_list(ha, ha->is_reset);
  				iscsi_host_for_each_session(ha->host,
  						qla4xxx_login_flash_ddb);
  			} else
  				qla4xxx_relogin_all_devices(ha);

  		}
  	}

  }
  
  /**
   * qla4xxx_free_adapter - release the adapter
   * @ha: pointer to adapter structure
   **/
  static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
  {

  	qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);

  
  	if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
  		/* Turn-off interrupts on the card. */

  		ha->isp_ops->disable_intrs(ha);

  	}

  	/* Remove timer thread, if present */
  	if (ha->timer_active)
  		qla4xxx_stop_timer(ha);

  	/* Kill the kernel thread for this host */
  	if (ha->dpc_thread)
  		destroy_workqueue(ha->dpc_thread);

  	/* Kill the kernel thread for this host */
  	if (ha->task_wq)
  		destroy_workqueue(ha->task_wq);

  	/* Put firmware in known state */
  	ha->isp_ops->reset_firmware(ha);

  	if (is_qla8022(ha)) {
  		qla4_8xxx_idc_lock(ha);
  		qla4_8xxx_clear_drv_active(ha);
  		qla4_8xxx_idc_unlock(ha);
  	}

  	/* Detach interrupts */
  	if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))

  		qla4xxx_free_irqs(ha);

  	/* free extra memory */
  	qla4xxx_mem_free(ha);

  }
  
  int qla4_8xxx_iospace_config(struct scsi_qla_host *ha)
  {
  	int status = 0;
  	uint8_t revision_id;
  	unsigned long mem_base, mem_len, db_base, db_len;
  	struct pci_dev *pdev = ha->pdev;
  
  	status = pci_request_regions(pdev, DRIVER_NAME);
  	if (status) {
  		printk(KERN_WARNING
  		    "scsi(%ld) Failed to reserve PIO regions (%s) "
  		    "status=%d
  ", ha->host_no, pci_name(pdev), status);
  		goto iospace_error_exit;
  	}
  
  	pci_read_config_byte(pdev, PCI_REVISION_ID, &revision_id);
  	DEBUG2(printk(KERN_INFO "%s: revision-id=%d
  ",
  	    __func__, revision_id));
  	ha->revision_id = revision_id;

  	/* remap phys address */
  	mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
  	mem_len = pci_resource_len(pdev, 0);
  	DEBUG2(printk(KERN_INFO "%s: ioremap from %lx a size of %lx
  ",
  	    __func__, mem_base, mem_len));

  	/* mapping of pcibase pointer */
  	ha->nx_pcibase = (unsigned long)ioremap(mem_base, mem_len);
  	if (!ha->nx_pcibase) {
  		printk(KERN_ERR
  		    "cannot remap MMIO (%s), aborting
  ", pci_name(pdev));
  		pci_release_regions(ha->pdev);
  		goto iospace_error_exit;
  	}
  
  	/* Mapping of IO base pointer, door bell read and write pointer */
  
  	/* mapping of IO base pointer */
  	ha->qla4_8xxx_reg =
  	    (struct device_reg_82xx  __iomem *)((uint8_t *)ha->nx_pcibase +
  	    0xbc000 + (ha->pdev->devfn << 11));
  
  	db_base = pci_resource_start(pdev, 4);  /* doorbell is on bar 4 */
  	db_len = pci_resource_len(pdev, 4);

  	ha->nx_db_wr_ptr = (ha->pdev->devfn == 4 ? QLA82XX_CAM_RAM_DB1 :
  	    QLA82XX_CAM_RAM_DB2);

  	return 0;

  iospace_error_exit:
  	return -ENOMEM;

  }
  
  /***
   * qla4xxx_iospace_config - maps registers
   * @ha: pointer to adapter structure
   *
   * This routines maps HBA's registers from the pci address space
   * into the kernel virtual address space for memory mapped i/o.
   **/

  int qla4xxx_iospace_config(struct scsi_qla_host *ha)

  {
  	unsigned long pio, pio_len, pio_flags;
  	unsigned long mmio, mmio_len, mmio_flags;
  
  	pio = pci_resource_start(ha->pdev, 0);
  	pio_len = pci_resource_len(ha->pdev, 0);
  	pio_flags = pci_resource_flags(ha->pdev, 0);
  	if (pio_flags & IORESOURCE_IO) {
  		if (pio_len < MIN_IOBASE_LEN) {

  			ql4_printk(KERN_WARNING, ha,

  				"Invalid PCI I/O region size
  ");
  			pio = 0;
  		}
  	} else {

  		ql4_printk(KERN_WARNING, ha, "region #0 not a PIO resource
  ");

  		pio = 0;
  	}
  
  	/* Use MMIO operations for all accesses. */
  	mmio = pci_resource_start(ha->pdev, 1);
  	mmio_len = pci_resource_len(ha->pdev, 1);
  	mmio_flags = pci_resource_flags(ha->pdev, 1);
  
  	if (!(mmio_flags & IORESOURCE_MEM)) {

  		ql4_printk(KERN_ERR, ha,
  		    "region #0 not an MMIO resource, aborting
  ");

  
  		goto iospace_error_exit;
  	}

  	if (mmio_len < MIN_IOBASE_LEN) {

  		ql4_printk(KERN_ERR, ha,
  		    "Invalid PCI mem region size, aborting
  ");

  		goto iospace_error_exit;
  	}
  
  	if (pci_request_regions(ha->pdev, DRIVER_NAME)) {

  		ql4_printk(KERN_WARNING, ha,
  		    "Failed to reserve PIO/MMIO regions
  ");

  
  		goto iospace_error_exit;
  	}
  
  	ha->pio_address = pio;
  	ha->pio_length = pio_len;
  	ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
  	if (!ha->reg) {

  		ql4_printk(KERN_ERR, ha,
  		    "cannot remap MMIO, aborting
  ");

  
  		goto iospace_error_exit;
  	}
  
  	return 0;
  
  iospace_error_exit:
  	return -ENOMEM;
  }

  static struct isp_operations qla4xxx_isp_ops = {
  	.iospace_config         = qla4xxx_iospace_config,
  	.pci_config             = qla4xxx_pci_config,
  	.disable_intrs          = qla4xxx_disable_intrs,
  	.enable_intrs           = qla4xxx_enable_intrs,
  	.start_firmware         = qla4xxx_start_firmware,
  	.intr_handler           = qla4xxx_intr_handler,
  	.interrupt_service_routine = qla4xxx_interrupt_service_routine,
  	.reset_chip             = qla4xxx_soft_reset,
  	.reset_firmware         = qla4xxx_hw_reset,
  	.queue_iocb             = qla4xxx_queue_iocb,
  	.complete_iocb          = qla4xxx_complete_iocb,
  	.rd_shdw_req_q_out      = qla4xxx_rd_shdw_req_q_out,
  	.rd_shdw_rsp_q_in       = qla4xxx_rd_shdw_rsp_q_in,
  	.get_sys_info           = qla4xxx_get_sys_info,
  };
  
  static struct isp_operations qla4_8xxx_isp_ops = {
  	.iospace_config         = qla4_8xxx_iospace_config,
  	.pci_config             = qla4_8xxx_pci_config,
  	.disable_intrs          = qla4_8xxx_disable_intrs,
  	.enable_intrs           = qla4_8xxx_enable_intrs,
  	.start_firmware         = qla4_8xxx_load_risc,
  	.intr_handler           = qla4_8xxx_intr_handler,
  	.interrupt_service_routine = qla4_8xxx_interrupt_service_routine,
  	.reset_chip             = qla4_8xxx_isp_reset,
  	.reset_firmware         = qla4_8xxx_stop_firmware,
  	.queue_iocb             = qla4_8xxx_queue_iocb,
  	.complete_iocb          = qla4_8xxx_complete_iocb,
  	.rd_shdw_req_q_out      = qla4_8xxx_rd_shdw_req_q_out,
  	.rd_shdw_rsp_q_in       = qla4_8xxx_rd_shdw_rsp_q_in,
  	.get_sys_info           = qla4_8xxx_get_sys_info,
  };
  
  uint16_t qla4xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
  {
  	return (uint16_t)le32_to_cpu(ha->shadow_regs->req_q_out);
  }
  
  uint16_t qla4_8xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
  {
  	return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->req_q_out));
  }
  
  uint16_t qla4xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
  {
  	return (uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in);
  }
  
  uint16_t qla4_8xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
  {
  	return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->rsp_q_in));
  }

  static ssize_t qla4xxx_show_boot_eth_info(void *data, int type, char *buf)
  {
  	struct scsi_qla_host *ha = data;
  	char *str = buf;
  	int rc;
  
  	switch (type) {
  	case ISCSI_BOOT_ETH_FLAGS:
  		rc = sprintf(str, "%d
  ", SYSFS_FLAG_FW_SEL_BOOT);
  		break;
  	case ISCSI_BOOT_ETH_INDEX:
  		rc = sprintf(str, "0
  ");
  		break;
  	case ISCSI_BOOT_ETH_MAC:
  		rc = sysfs_format_mac(str, ha->my_mac,
  				      MAC_ADDR_LEN);
  		break;
  	default:
  		rc = -ENOSYS;
  		break;
  	}
  	return rc;
  }

  static umode_t qla4xxx_eth_get_attr_visibility(void *data, int type)

  {
  	int rc;
  
  	switch (type) {
  	case ISCSI_BOOT_ETH_FLAGS:
  	case ISCSI_BOOT_ETH_MAC:
  	case ISCSI_BOOT_ETH_INDEX:
  		rc = S_IRUGO;
  		break;
  	default:
  		rc = 0;
  		break;
  	}
  	return rc;
  }
  
  static ssize_t qla4xxx_show_boot_ini_info(void *data, int type, char *buf)
  {
  	struct scsi_qla_host *ha = data;
  	char *str = buf;
  	int rc;
  
  	switch (type) {
  	case ISCSI_BOOT_INI_INITIATOR_NAME:
  		rc = sprintf(str, "%s
  ", ha->name_string);
  		break;
  	default:
  		rc = -ENOSYS;
  		break;
  	}
  	return rc;
  }

  static umode_t qla4xxx_ini_get_attr_visibility(void *data, int type)

  {
  	int rc;
  
  	switch (type) {
  	case ISCSI_BOOT_INI_INITIATOR_NAME:
  		rc = S_IRUGO;
  		break;
  	default:
  		rc = 0;
  		break;
  	}
  	return rc;
  }
  
  static ssize_t
  qla4xxx_show_boot_tgt_info(struct ql4_boot_session_info *boot_sess, int type,
  			   char *buf)
  {
  	struct ql4_conn_info *boot_conn = &boot_sess->conn_list[0];
  	char *str = buf;
  	int rc;
  
  	switch (type) {
  	case ISCSI_BOOT_TGT_NAME:
  		rc = sprintf(buf, "%s
  ", (char *)&boot_sess->target_name);
  		break;
  	case ISCSI_BOOT_TGT_IP_ADDR:
  		if (boot_sess->conn_list[0].dest_ipaddr.ip_type == 0x1)
  			rc = sprintf(buf, "%pI4
  ",
  				     &boot_conn->dest_ipaddr.ip_address);
  		else
  			rc = sprintf(str, "%pI6
  ",
  				     &boot_conn->dest_ipaddr.ip_address);
  		break;
  	case ISCSI_BOOT_TGT_PORT:
  			rc = sprintf(str, "%d
  ", boot_conn->dest_port);
  		break;
  	case ISCSI_BOOT_TGT_CHAP_NAME:
  		rc = sprintf(str,  "%.*s
  ",
  			     boot_conn->chap.target_chap_name_length,
  			     (char *)&boot_conn->chap.target_chap_name);
  		break;
  	case ISCSI_BOOT_TGT_CHAP_SECRET:
  		rc = sprintf(str,  "%.*s
  ",
  			     boot_conn->chap.target_secret_length,
  			     (char *)&boot_conn->chap.target_secret);
  		break;
  	case ISCSI_BOOT_TGT_REV_CHAP_NAME:
  		rc = sprintf(str,  "%.*s
  ",
  			     boot_conn->chap.intr_chap_name_length,
  			     (char *)&boot_conn->chap.intr_chap_name);
  		break;
  	case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
  		rc = sprintf(str,  "%.*s
  ",
  			     boot_conn->chap.intr_secret_length,
  			     (char *)&boot_conn->chap.intr_secret);
  		break;
  	case ISCSI_BOOT_TGT_FLAGS:
  		rc = sprintf(str, "%d
  ", SYSFS_FLAG_FW_SEL_BOOT);
  		break;
  	case ISCSI_BOOT_TGT_NIC_ASSOC:
  		rc = sprintf(str, "0
  ");
  		break;
  	default:
  		rc = -ENOSYS;
  		break;
  	}
  	return rc;
  }
  
  static ssize_t qla4xxx_show_boot_tgt_pri_info(void *data, int type, char *buf)
  {
  	struct scsi_qla_host *ha = data;
  	struct ql4_boot_session_info *boot_sess = &(ha->boot_tgt.boot_pri_sess);
  
  	return qla4xxx_show_boot_tgt_info(boot_sess, type, buf);
  }
  
  static ssize_t qla4xxx_show_boot_tgt_sec_info(void *data, int type, char *buf)
  {
  	struct scsi_qla_host *ha = data;
  	struct ql4_boot_session_info *boot_sess = &(ha->boot_tgt.boot_sec_sess);
  
  	return qla4xxx_show_boot_tgt_info(boot_sess, type, buf);
  }

  static umode_t qla4xxx_tgt_get_attr_visibility(void *data, int type)

  {
  	int rc;
  
  	switch (type) {
  	case ISCSI_BOOT_TGT_NAME:
  	case ISCSI_BOOT_TGT_IP_ADDR:
  	case ISCSI_BOOT_TGT_PORT:
  	case ISCSI_BOOT_TGT_CHAP_NAME:
  	case ISCSI_BOOT_TGT_CHAP_SECRET:
  	case ISCSI_BOOT_TGT_REV_CHAP_NAME:
  	case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
  	case ISCSI_BOOT_TGT_NIC_ASSOC:
  	case ISCSI_BOOT_TGT_FLAGS:
  		rc = S_IRUGO;
  		break;
  	default:
  		rc = 0;
  		break;
  	}
  	return rc;
  }
  
  static void qla4xxx_boot_release(void *data)
  {
  	struct scsi_qla_host *ha = data;
  
  	scsi_host_put(ha->host);
  }
  
  static int get_fw_boot_info(struct scsi_qla_host *ha, uint16_t ddb_index[])
  {
  	dma_addr_t buf_dma;
  	uint32_t addr, pri_addr, sec_addr;
  	uint32_t offset;
  	uint16_t func_num;
  	uint8_t val;
  	uint8_t *buf = NULL;
  	size_t size = 13 * sizeof(uint8_t);
  	int ret = QLA_SUCCESS;
  
  	func_num = PCI_FUNC(ha->pdev->devfn);

  	ql4_printk(KERN_INFO, ha, "%s: Get FW boot info for 0x%x func %d
  ",
  		   __func__, ha->pdev->device, func_num);

  	if (is_qla40XX(ha)) {

  		if (func_num == 1) {
  			addr = NVRAM_PORT0_BOOT_MODE;
  			pri_addr = NVRAM_PORT0_BOOT_PRI_TGT;
  			sec_addr = NVRAM_PORT0_BOOT_SEC_TGT;
  		} else if (func_num == 3) {
  			addr = NVRAM_PORT1_BOOT_MODE;
  			pri_addr = NVRAM_PORT1_BOOT_PRI_TGT;
  			sec_addr = NVRAM_PORT1_BOOT_SEC_TGT;
  		} else {
  			ret = QLA_ERROR;
  			goto exit_boot_info;
  		}
  
  		/* Check Boot Mode */
  		val = rd_nvram_byte(ha, addr);
  		if (!(val & 0x07)) {
  			DEBUG2(ql4_printk(KERN_ERR, ha,
  					  "%s: Failed Boot options : 0x%x
  ",
  					  __func__, val));
  			ret = QLA_ERROR;
  			goto exit_boot_info;
  		}
  
  		/* get primary valid target index */
  		val = rd_nvram_byte(ha, pri_addr);
  		if (val & BIT_7)
  			ddb_index[0] = (val & 0x7f);

  
  		/* get secondary valid target index */
  		val = rd_nvram_byte(ha, sec_addr);
  		if (val & BIT_7)
  			ddb_index[1] = (val & 0x7f);

  
  	} else if (is_qla8022(ha)) {
  		buf = dma_alloc_coherent(&ha->pdev->dev, size,
  					 &buf_dma, GFP_KERNEL);
  		if (!buf) {
  			DEBUG2(ql4_printk(KERN_ERR, ha,
  					  "%s: Unable to allocate dma buffer
  ",
  					   __func__));
  			ret = QLA_ERROR;
  			goto exit_boot_info;
  		}
  
  		if (ha->port_num == 0)
  			offset = BOOT_PARAM_OFFSET_PORT0;
  		else if (ha->port_num == 1)
  			offset = BOOT_PARAM_OFFSET_PORT1;
  		else {
  			ret = QLA_ERROR;
  			goto exit_boot_info_free;
  		}
  		addr = FLASH_RAW_ACCESS_ADDR + (ha->hw.flt_iscsi_param * 4) +
  		       offset;
  		if (qla4xxx_get_flash(ha, buf_dma, addr,
  				      13 * sizeof(uint8_t)) != QLA_SUCCESS) {
  			DEBUG2(ql4_printk(KERN_ERR, ha, "scsi%ld: %s: Get Flash"
  					  "failed
  ", ha->host_no, __func__));
  			ret = QLA_ERROR;
  			goto exit_boot_info_free;
  		}
  		/* Check Boot Mode */
  		if (!(buf[1] & 0x07)) {
  			DEBUG2(ql4_printk(KERN_INFO, ha,
  					  "Failed: Boot options : 0x%x
  ",
  					  buf[1]));
  			ret = QLA_ERROR;
  			goto exit_boot_info_free;
  		}
  
  		/* get primary valid target index */
  		if (buf[2] & BIT_7)
  			ddb_index[0] = buf[2] & 0x7f;

  
  		/* get secondary valid target index */
  		if (buf[11] & BIT_7)
  			ddb_index[1] = buf[11] & 0x7f;

  	} else {
  		ret = QLA_ERROR;
  		goto exit_boot_info;
  	}
  
  	DEBUG2(ql4_printk(KERN_INFO, ha, "%s: Primary target ID %d, Secondary"
  			  " target ID %d
  ", __func__, ddb_index[0],
  			  ddb_index[1]));

  	ha->pri_ddb_idx = ddb_index[0];
  	ha->sec_ddb_idx = ddb_index[1];

  exit_boot_info_free:
  	dma_free_coherent(&ha->pdev->dev, size, buf, buf_dma);
  exit_boot_info:
  	return ret;
  }

  /**
   * qla4xxx_get_bidi_chap - Get a BIDI CHAP user and password
   * @ha: pointer to adapter structure
   * @username: CHAP username to be returned
   * @password: CHAP password to be returned
   *
   * If a boot entry has BIDI CHAP enabled then we need to set the BIDI CHAP
   * user and password in the sysfs entry in /sys/firmware/iscsi_boot#/.
   * So from the CHAP cache find the first BIDI CHAP entry and set it
   * to the boot record in sysfs.
   **/
  static int qla4xxx_get_bidi_chap(struct scsi_qla_host *ha, char *username,
  			    char *password)
  {
  	int i, ret = -EINVAL;
  	int max_chap_entries = 0;
  	struct ql4_chap_table *chap_table;
  
  	if (is_qla8022(ha))
  		max_chap_entries = (ha->hw.flt_chap_size / 2) /
  						sizeof(struct ql4_chap_table);
  	else
  		max_chap_entries = MAX_CHAP_ENTRIES_40XX;
  
  	if (!ha->chap_list) {
  		ql4_printk(KERN_ERR, ha, "Do not have CHAP table cache
  ");
  		return ret;
  	}
  
  	mutex_lock(&ha->chap_sem);
  	for (i = 0; i < max_chap_entries; i++) {
  		chap_table = (struct ql4_chap_table *)ha->chap_list + i;
  		if (chap_table->cookie !=
  		    __constant_cpu_to_le16(CHAP_VALID_COOKIE)) {
  			continue;
  		}
  
  		if (chap_table->flags & BIT_7) /* local */
  			continue;
  
  		if (!(chap_table->flags & BIT_6)) /* Not BIDI */
  			continue;
  
  		strncpy(password, chap_table->secret, QL4_CHAP_MAX_SECRET_LEN);
  		strncpy(username, chap_table->name, QL4_CHAP_MAX_NAME_LEN);
  		ret = 0;
  		break;
  	}
  	mutex_unlock(&ha->chap_sem);
  
  	return ret;
  }

  static int qla4xxx_get_boot_target(struct scsi_qla_host *ha,
  				   struct ql4_boot_session_info *boot_sess,
  				   uint16_t ddb_index)
  {
  	struct ql4_conn_info *boot_conn = &boot_sess->conn_list[0];
  	struct dev_db_entry *fw_ddb_entry;
  	dma_addr_t fw_ddb_entry_dma;
  	uint16_t idx;
  	uint16_t options;
  	int ret = QLA_SUCCESS;
  
  	fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
  					  &fw_ddb_entry_dma, GFP_KERNEL);
  	if (!fw_ddb_entry) {
  		DEBUG2(ql4_printk(KERN_ERR, ha,
  				  "%s: Unable to allocate dma buffer.
  ",
  				  __func__));
  		ret = QLA_ERROR;
  		return ret;
  	}
  
  	if (qla4xxx_bootdb_by_index(ha, fw_ddb_entry,
  				   fw_ddb_entry_dma, ddb_index)) {
  		DEBUG2(ql4_printk(KERN_ERR, ha,
  				  "%s: Flash DDB read Failed
  ", __func__));
  		ret = QLA_ERROR;
  		goto exit_boot_target;
  	}
  
  	/* Update target name and IP from DDB */
  	memcpy(boot_sess->target_name, fw_ddb_entry->iscsi_name,
  	       min(sizeof(boot_sess->target_name),
  		   sizeof(fw_ddb_entry->iscsi_name)));
  
  	options = le16_to_cpu(fw_ddb_entry->options);
  	if (options & DDB_OPT_IPV6_DEVICE) {
  		memcpy(&boot_conn->dest_ipaddr.ip_address,
  		       &fw_ddb_entry->ip_addr[0], IPv6_ADDR_LEN);
  	} else {
  		boot_conn->dest_ipaddr.ip_type = 0x1;
  		memcpy(&boot_conn->dest_ipaddr.ip_address,
  		       &fw_ddb_entry->ip_addr[0], IP_ADDR_LEN);
  	}
  
  	boot_conn->dest_port = le16_to_cpu(fw_ddb_entry->port);
  
  	/* update chap information */
  	idx = __le16_to_cpu(fw_ddb_entry->chap_tbl_idx);
  
  	if (BIT_7 & le16_to_cpu(fw_ddb_entry->iscsi_options))	{
  
  		DEBUG2(ql4_printk(KERN_INFO, ha, "Setting chap
  "));
  
  		ret = qla4xxx_get_chap(ha, (char *)&boot_conn->chap.
  				       target_chap_name,
  				       (char *)&boot_conn->chap.target_secret,
  				       idx);
  		if (ret) {
  			ql4_printk(KERN_ERR, ha, "Failed to set chap
  ");
  			ret = QLA_ERROR;
  			goto exit_boot_target;
  		}
  
  		boot_conn->chap.target_chap_name_length = QL4_CHAP_MAX_NAME_LEN;
  		boot_conn->chap.target_secret_length = QL4_CHAP_MAX_SECRET_LEN;
  	}
  
  	if (BIT_4 & le16_to_cpu(fw_ddb_entry->iscsi_options)) {
  
  		DEBUG2(ql4_printk(KERN_INFO, ha, "Setting BIDI chap
  "));

  		ret = qla4xxx_get_bidi_chap(ha,
  				    (char *)&boot_conn->chap.intr_chap_name,
  				    (char *)&boot_conn->chap.intr_secret);

  		if (ret) {
  			ql4_printk(KERN_ERR, ha, "Failed to set BIDI chap
  ");
  			ret = QLA_ERROR;
  			goto exit_boot_target;
  		}
  
  		boot_conn->chap.intr_chap_name_length = QL4_CHAP_MAX_NAME_LEN;
  		boot_conn->chap.intr_secret_length = QL4_CHAP_MAX_SECRET_LEN;
  	}
  
  exit_boot_target:
  	dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
  			  fw_ddb_entry, fw_ddb_entry_dma);
  	return ret;
  }
  
  static int qla4xxx_get_boot_info(struct scsi_qla_host *ha)
  {
  	uint16_t ddb_index[2];

  	int ret = QLA_ERROR;
  	int rval;

  
  	memset(ddb_index, 0, sizeof(ddb_index));

  	ddb_index[0] = 0xffff;
  	ddb_index[1] = 0xffff;

  	ret = get_fw_boot_info(ha, ddb_index);
  	if (ret != QLA_SUCCESS) {
  		DEBUG2(ql4_printk(KERN_ERR, ha,
  				  "%s: Failed to set boot info.
  ", __func__));
  		return ret;
  	}

  	if (ql4xdisablesysfsboot)
  		return QLA_SUCCESS;

  	if (ddb_index[0] == 0xffff)
  		goto sec_target;
  
  	rval = qla4xxx_get_boot_target(ha, &(ha->boot_tgt.boot_pri_sess),

  				      ddb_index[0]);

  	if (rval != QLA_SUCCESS) {

  		DEBUG2(ql4_printk(KERN_ERR, ha, "%s: Failed to get "
  				  "primary target
  ", __func__));

  	} else
  		ret = QLA_SUCCESS;

  sec_target:
  	if (ddb_index[1] == 0xffff)
  		goto exit_get_boot_info;
  
  	rval = qla4xxx_get_boot_target(ha, &(ha->boot_tgt.boot_sec_sess),

  				      ddb_index[1]);

  	if (rval != QLA_SUCCESS) {

  		DEBUG2(ql4_printk(KERN_ERR, ha, "%s: Failed to get "
  				  "secondary target
  ", __func__));

  	} else
  		ret = QLA_SUCCESS;
  
  exit_get_boot_info:

  	return ret;
  }
  
  static int qla4xxx_setup_boot_info(struct scsi_qla_host *ha)
  {
  	struct iscsi_boot_kobj *boot_kobj;
  
  	if (qla4xxx_get_boot_info(ha) != QLA_SUCCESS)

  		return QLA_ERROR;
  
  	if (ql4xdisablesysfsboot) {
  		ql4_printk(KERN_INFO, ha,
  			   "%s: syfsboot disabled - driver will trigger login"
  			   "and publish session for discovery .
  ", __func__);
  		return QLA_SUCCESS;
  	}

  
  	ha->boot_kset = iscsi_boot_create_host_kset(ha->host->host_no);
  	if (!ha->boot_kset)
  		goto kset_free;
  
  	if (!scsi_host_get(ha->host))
  		goto kset_free;
  	boot_kobj = iscsi_boot_create_target(ha->boot_kset, 0, ha,
  					     qla4xxx_show_boot_tgt_pri_info,
  					     qla4xxx_tgt_get_attr_visibility,
  					     qla4xxx_boot_release);
  	if (!boot_kobj)
  		goto put_host;
  
  	if (!scsi_host_get(ha->host))
  		goto kset_free;
  	boot_kobj = iscsi_boot_create_target(ha->boot_kset, 1, ha,
  					     qla4xxx_show_boot_tgt_sec_info,
  					     qla4xxx_tgt_get_attr_visibility,
  					     qla4xxx_boot_release);
  	if (!boot_kobj)
  		goto put_host;
  
  	if (!scsi_host_get(ha->host))
  		goto kset_free;
  	boot_kobj = iscsi_boot_create_initiator(ha->boot_kset, 0, ha,
  					       qla4xxx_show_boot_ini_info,
  					       qla4xxx_ini_get_attr_visibility,
  					       qla4xxx_boot_release);
  	if (!boot_kobj)
  		goto put_host;
  
  	if (!scsi_host_get(ha->host))
  		goto kset_free;
  	boot_kobj = iscsi_boot_create_ethernet(ha->boot_kset, 0, ha,
  					       qla4xxx_show_boot_eth_info,
  					       qla4xxx_eth_get_attr_visibility,
  					       qla4xxx_boot_release);
  	if (!boot_kobj)
  		goto put_host;

  	return QLA_SUCCESS;

  
  put_host:
  	scsi_host_put(ha->host);
  kset_free:
  	iscsi_boot_destroy_kset(ha->boot_kset);
  	return -ENOMEM;
  }

  
  /**
   * qla4xxx_create chap_list - Create CHAP list from FLASH
   * @ha: pointer to adapter structure
   *
   * Read flash and make a list of CHAP entries, during login when a CHAP entry
   * is received, it will be checked in this list. If entry exist then the CHAP
   * entry index is set in the DDB. If CHAP entry does not exist in this list
   * then a new entry is added in FLASH in CHAP table and the index obtained is
   * used in the DDB.
   **/
  static void qla4xxx_create_chap_list(struct scsi_qla_host *ha)
  {
  	int rval = 0;
  	uint8_t *chap_flash_data = NULL;
  	uint32_t offset;
  	dma_addr_t chap_dma;
  	uint32_t chap_size = 0;
  
  	if (is_qla40XX(ha))
  		chap_size = MAX_CHAP_ENTRIES_40XX  *
  					sizeof(struct ql4_chap_table);
  	else	/* Single region contains CHAP info for both
  		 * ports which is divided into half for each port.
  		 */
  		chap_size = ha->hw.flt_chap_size / 2;
  
  	chap_flash_data = dma_alloc_coherent(&ha->pdev->dev, chap_size,
  					  &chap_dma, GFP_KERNEL);
  	if (!chap_flash_data) {
  		ql4_printk(KERN_ERR, ha, "No memory for chap_flash_data
  ");
  		return;
  	}
  	if (is_qla40XX(ha))
  		offset = FLASH_CHAP_OFFSET;
  	else {
  		offset = FLASH_RAW_ACCESS_ADDR + (ha->hw.flt_region_chap << 2);
  		if (ha->port_num == 1)
  			offset += chap_size;
  	}
  
  	rval = qla4xxx_get_flash(ha, chap_dma, offset, chap_size);
  	if (rval != QLA_SUCCESS)
  		goto exit_chap_list;
  
  	if (ha->chap_list == NULL)
  		ha->chap_list = vmalloc(chap_size);
  	if (ha->chap_list == NULL) {
  		ql4_printk(KERN_ERR, ha, "No memory for ha->chap_list
  ");
  		goto exit_chap_list;
  	}
  
  	memcpy(ha->chap_list, chap_flash_data, chap_size);
  
  exit_chap_list:
  	dma_free_coherent(&ha->pdev->dev, chap_size,
  			chap_flash_data, chap_dma);

  }

  static void qla4xxx_get_param_ddb(struct ddb_entry *ddb_entry,
  				  struct ql4_tuple_ddb *tddb)
  {
  	struct scsi_qla_host *ha;
  	struct iscsi_cls_session *cls_sess;
  	struct iscsi_cls_conn *cls_conn;
  	struct iscsi_session *sess;
  	struct iscsi_conn *conn;
  
  	DEBUG2(printk(KERN_INFO "Func: %s
  ", __func__));
  	ha = ddb_entry->ha;
  	cls_sess = ddb_entry->sess;
  	sess = cls_sess->dd_data;
  	cls_conn = ddb_entry->conn;
  	conn = cls_conn->dd_data;
  
  	tddb->tpgt = sess->tpgt;
  	tddb->port = conn->persistent_port;
  	strncpy(tddb->iscsi_name, sess->targetname, ISCSI_NAME_SIZE);
  	strncpy(tddb->ip_addr, conn->persistent_address, DDB_IPADDR_LEN);
  }
  
  static void qla4xxx_convert_param_ddb(struct dev_db_entry *fw_ddb_entry,
  				      struct ql4_tuple_ddb *tddb)
  {
  	uint16_t options = 0;
  
  	tddb->tpgt = le32_to_cpu(fw_ddb_entry->tgt_portal_grp);
  	memcpy(&tddb->iscsi_name[0], &fw_ddb_entry->iscsi_name[0],
  	       min(sizeof(tddb->iscsi_name), sizeof(fw_ddb_entry->iscsi_name)));
  
  	options = le16_to_cpu(fw_ddb_entry->options);
  	if (options & DDB_OPT_IPV6_DEVICE)
  		sprintf(tddb->ip_addr, "%pI6", fw_ddb_entry->ip_addr);
  	else
  		sprintf(tddb->ip_addr, "%pI4", fw_ddb_entry->ip_addr);
  
  	tddb->port = le16_to_cpu(fw_ddb_entry->port);
  }
  
  static int qla4xxx_compare_tuple_ddb(struct scsi_qla_host *ha,
  				     struct ql4_tuple_ddb *old_tddb,
  				     struct ql4_tuple_ddb *new_tddb)
  {
  	if (strcmp(old_tddb->iscsi_name, new_tddb->iscsi_name))
  		return QLA_ERROR;
  
  	if (strcmp(old_tddb->ip_addr, new_tddb->ip_addr))
  		return QLA_ERROR;
  
  	if (old_tddb->port != new_tddb->port)
  		return QLA_ERROR;
  
  	DEBUG2(ql4_printk(KERN_INFO, ha,
  			  "Match Found, fw[%d,%d,%s,%s], [%d,%d,%s,%s]",
  			  old_tddb->port, old_tddb->tpgt, old_tddb->ip_addr,
  			  old_tddb->iscsi_name, new_tddb->port, new_tddb->tpgt,
  			  new_tddb->ip_addr, new_tddb->iscsi_name));
  
  	return QLA_SUCCESS;
  }
  
  static int qla4xxx_is_session_exists(struct scsi_qla_host *ha,
  				     struct dev_db_entry *fw_ddb_entry)
  {
  	struct ddb_entry *ddb_entry;
  	struct ql4_tuple_ddb *fw_tddb = NULL;
  	struct ql4_tuple_ddb *tmp_tddb = NULL;
  	int idx;
  	int ret = QLA_ERROR;
  
  	fw_tddb = vzalloc(sizeof(*fw_tddb));
  	if (!fw_tddb) {
  		DEBUG2(ql4_printk(KERN_WARNING, ha,
  				  "Memory Allocation failed.
  "));
  		ret = QLA_SUCCESS;
  		goto exit_check;
  	}
  
  	tmp_tddb = vzalloc(sizeof(*tmp_tddb));
  	if (!tmp_tddb) {
  		DEBUG2(ql4_printk(KERN_WARNING, ha,
  				  "Memory Allocation failed.
  "));
  		ret = QLA_SUCCESS;
  		goto exit_check;
  	}
  
  	qla4xxx_convert_param_ddb(fw_ddb_entry, fw_tddb);
  
  	for (idx = 0; idx < MAX_DDB_ENTRIES; idx++) {
  		ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, idx);
  		if (ddb_entry == NULL)
  			continue;
  
  		qla4xxx_get_param_ddb(ddb_entry, tmp_tddb);
  		if (!qla4xxx_compare_tuple_ddb(ha, fw_tddb, tmp_tddb)) {
  			ret = QLA_SUCCESS; /* found */
  			goto exit_check;
  		}
  	}
  
  exit_check:
  	if (fw_tddb)
  		vfree(fw_tddb);
  	if (tmp_tddb)
  		vfree(tmp_tddb);
  	return ret;
  }
  
  static int qla4xxx_is_flash_ddb_exists(struct scsi_qla_host *ha,
  				       struct list_head *list_nt,
  				       struct dev_db_entry *fw_ddb_entry)
  {
  	struct qla_ddb_index  *nt_ddb_idx, *nt_ddb_idx_tmp;
  	struct ql4_tuple_ddb *fw_tddb = NULL;
  	struct ql4_tuple_ddb *tmp_tddb = NULL;
  	int ret = QLA_ERROR;
  
  	fw_tddb = vzalloc(sizeof(*fw_tddb));
  	if (!fw_tddb) {
  		DEBUG2(ql4_printk(KERN_WARNING, ha,
  				  "Memory Allocation failed.
  "));
  		ret = QLA_SUCCESS;
  		goto exit_check;
  	}
  
  	tmp_tddb = vzalloc(sizeof(*tmp_tddb));
  	if (!tmp_tddb) {
  		DEBUG2(ql4_printk(KERN_WARNING, ha,
  				  "Memory Allocation failed.
  "));
  		ret = QLA_SUCCESS;
  		goto exit_check;
  	}
  
  	qla4xxx_convert_param_ddb(fw_ddb_entry, fw_tddb);
  
  	list_for_each_entry_safe(nt_ddb_idx, nt_ddb_idx_tmp, list_nt, list) {
  		qla4xxx_convert_param_ddb(&nt_ddb_idx->fw_ddb, tmp_tddb);
  		if (!qla4xxx_compare_tuple_ddb(ha, fw_tddb, tmp_tddb)) {
  			ret = QLA_SUCCESS; /* found */
  			goto exit_check;
  		}
  	}
  
  exit_check:
  	if (fw_tddb)
  		vfree(fw_tddb);
  	if (tmp_tddb)
  		vfree(tmp_tddb);
  	return ret;
  }
  
  static void qla4xxx_free_nt_list(struct list_head *list_nt)
  {
  	struct qla_ddb_index  *nt_ddb_idx, *nt_ddb_idx_tmp;
  
  	/* Free up the normaltargets list */
  	list_for_each_entry_safe(nt_ddb_idx, nt_ddb_idx_tmp, list_nt, list) {
  		list_del_init(&nt_ddb_idx->list);
  		vfree(nt_ddb_idx);
  	}
  
  }
  
  static struct iscsi_endpoint *qla4xxx_get_ep_fwdb(struct scsi_qla_host *ha,
  					struct dev_db_entry *fw_ddb_entry)
  {
  	struct iscsi_endpoint *ep;
  	struct sockaddr_in *addr;
  	struct sockaddr_in6 *addr6;
  	struct sockaddr *dst_addr;
  	char *ip;
  
  	/* TODO: need to destroy on unload iscsi_endpoint*/
  	dst_addr = vmalloc(sizeof(*dst_addr));
  	if (!dst_addr)
  		return NULL;
  
  	if (fw_ddb_entry->options & DDB_OPT_IPV6_DEVICE) {
  		dst_addr->sa_family = AF_INET6;
  		addr6 = (struct sockaddr_in6 *)dst_addr;
  		ip = (char *)&addr6->sin6_addr;
  		memcpy(ip, fw_ddb_entry->ip_addr, IPv6_ADDR_LEN);
  		addr6->sin6_port = htons(le16_to_cpu(fw_ddb_entry->port));
  
  	} else {
  		dst_addr->sa_family = AF_INET;
  		addr = (struct sockaddr_in *)dst_addr;
  		ip = (char *)&addr->sin_addr;
  		memcpy(ip, fw_ddb_entry->ip_addr, IP_ADDR_LEN);
  		addr->sin_port = htons(le16_to_cpu(fw_ddb_entry->port));
  	}
  
  	ep = qla4xxx_ep_connect(ha->host, dst_addr, 0);
  	vfree(dst_addr);
  	return ep;
  }
  
  static int qla4xxx_verify_boot_idx(struct scsi_qla_host *ha, uint16_t idx)
  {
  	if (ql4xdisablesysfsboot)
  		return QLA_SUCCESS;
  	if (idx == ha->pri_ddb_idx || idx == ha->sec_ddb_idx)
  		return QLA_ERROR;
  	return QLA_SUCCESS;
  }
  
  static void qla4xxx_setup_flash_ddb_entry(struct scsi_qla_host *ha,
  					  struct ddb_entry *ddb_entry)
  {
  	ddb_entry->ddb_type = FLASH_DDB;
  	ddb_entry->fw_ddb_index = INVALID_ENTRY;
  	ddb_entry->fw_ddb_device_state = DDB_DS_NO_CONNECTION_ACTIVE;
  	ddb_entry->ha = ha;
  	ddb_entry->unblock_sess = qla4xxx_unblock_flash_ddb;
  	ddb_entry->ddb_change = qla4xxx_flash_ddb_change;
  
  	atomic_set(&ddb_entry->retry_relogin_timer, INVALID_ENTRY);
  	atomic_set(&ddb_entry->relogin_timer, 0);
  	atomic_set(&ddb_entry->relogin_retry_count, 0);
  
  	ddb_entry->default_relogin_timeout =
  		le16_to_cpu(ddb_entry->fw_ddb_entry.def_timeout);
  	ddb_entry->default_time2wait =
  		le16_to_cpu(ddb_entry->fw_ddb_entry.iscsi_def_time2wait);
  }
  
  static void qla4xxx_wait_for_ip_configuration(struct scsi_qla_host *ha)
  {
  	uint32_t idx = 0;
  	uint32_t ip_idx[IP_ADDR_COUNT] = {0, 1, 2, 3}; /* 4 IP interfaces */
  	uint32_t sts[MBOX_REG_COUNT];
  	uint32_t ip_state;
  	unsigned long wtime;
  	int ret;
  
  	wtime = jiffies + (HZ * IP_CONFIG_TOV);
  	do {
  		for (idx = 0; idx < IP_ADDR_COUNT; idx++) {
  			if (ip_idx[idx] == -1)
  				continue;
  
  			ret = qla4xxx_get_ip_state(ha, 0, ip_idx[idx], sts);
  
  			if (ret == QLA_ERROR) {
  				ip_idx[idx] = -1;
  				continue;
  			}
  
  			ip_state = (sts[1] & IP_STATE_MASK) >> IP_STATE_SHIFT;
  
  			DEBUG2(ql4_printk(KERN_INFO, ha,
  					  "Waiting for IP state for idx = %d, state = 0x%x
  ",
  					  ip_idx[idx], ip_state));
  			if (ip_state == IP_ADDRSTATE_UNCONFIGURED ||
  			    ip_state == IP_ADDRSTATE_INVALID ||
  			    ip_state == IP_ADDRSTATE_PREFERRED ||
  			    ip_state == IP_ADDRSTATE_DEPRICATED ||
  			    ip_state == IP_ADDRSTATE_DISABLING)
  				ip_idx[idx] = -1;
  
  		}
  
  		/* Break if all IP states checked */
  		if ((ip_idx[0] == -1) &&
  		    (ip_idx[1] == -1) &&
  		    (ip_idx[2] == -1) &&
  		    (ip_idx[3] == -1))
  			break;
  		schedule_timeout_uninterruptible(HZ);
  	} while (time_after(wtime, jiffies));
  }
  
  void qla4xxx_build_ddb_list(struct scsi_qla_host *ha, int is_reset)
  {
  	int max_ddbs;
  	int ret;
  	uint32_t idx = 0, next_idx = 0;
  	uint32_t state = 0, conn_err = 0;
  	uint16_t conn_id;
  	struct dev_db_entry *fw_ddb_entry;
  	struct ddb_entry *ddb_entry = NULL;
  	dma_addr_t fw_ddb_dma;
  	struct iscsi_cls_session *cls_sess;
  	struct iscsi_session *sess;
  	struct iscsi_cls_conn *cls_conn;
  	struct iscsi_endpoint *ep;
  	uint16_t cmds_max = 32, tmo = 0;
  	uint32_t initial_cmdsn = 0;
  	struct list_head list_st, list_nt; /* List of sendtargets */
  	struct qla_ddb_index  *st_ddb_idx, *st_ddb_idx_tmp;
  	int fw_idx_size;
  	unsigned long wtime;
  	struct qla_ddb_index  *nt_ddb_idx;
  
  	if (!test_bit(AF_LINK_UP, &ha->flags)) {
  		set_bit(AF_BUILD_DDB_LIST, &ha->flags);
  		ha->is_reset = is_reset;
  		return;
  	}
  	max_ddbs =  is_qla40XX(ha) ? MAX_DEV_DB_ENTRIES_40XX :
  				     MAX_DEV_DB_ENTRIES;
  
  	fw_ddb_entry = dma_pool_alloc(ha->fw_ddb_dma_pool, GFP_KERNEL,
  				      &fw_ddb_dma);
  	if (fw_ddb_entry == NULL) {
  		DEBUG2(ql4_printk(KERN_ERR, ha, "Out of memory
  "));
  		goto exit_ddb_list;
  	}
  
  	INIT_LIST_HEAD(&list_st);
  	INIT_LIST_HEAD(&list_nt);
  	fw_idx_size = sizeof(struct qla_ddb_index);
  
  	for (idx = 0; idx < max_ddbs; idx = next_idx) {
  		ret = qla4xxx_get_fwddb_entry(ha, idx, fw_ddb_entry,
  					      fw_ddb_dma, NULL,
  					      &next_idx, &state, &conn_err,
  					      NULL, &conn_id);
  		if (ret == QLA_ERROR)
  			break;
  
  		if (qla4xxx_verify_boot_idx(ha, idx) != QLA_SUCCESS)
  			goto continue_next_st;
  
  		/* Check if ST, add to the list_st */
  		if (strlen((char *) fw_ddb_entry->iscsi_name) != 0)
  			goto continue_next_st;
  
  		st_ddb_idx = vzalloc(fw_idx_size);
  		if (!st_ddb_idx)
  			break;
  
  		st_ddb_idx->fw_ddb_idx = idx;
  
  		list_add_tail(&st_ddb_idx->list, &list_st);
  continue_next_st:
  		if (next_idx == 0)
  			break;
  	}
  
  	/* Before issuing conn open mbox, ensure all IPs states are configured
  	 * Note, conn open fails if IPs are not configured
  	 */
  	qla4xxx_wait_for_ip_configuration(ha);
  
  	/* Go thru the STs and fire the sendtargets by issuing conn open mbx */
  	list_for_each_entry_safe(st_ddb_idx, st_ddb_idx_tmp, &list_st, list) {
  		qla4xxx_conn_open(ha, st_ddb_idx->fw_ddb_idx);
  	}
  
  	/* Wait to ensure all sendtargets are done for min 12 sec wait */
  	tmo = ((ha->def_timeout < LOGIN_TOV) ? LOGIN_TOV : ha->def_timeout);
  	DEBUG2(ql4_printk(KERN_INFO, ha,
  			  "Default time to wait for build ddb %d
  ", tmo));
  
  	wtime = jiffies + (HZ * tmo);
  	do {
  		list_for_each_entry_safe(st_ddb_idx, st_ddb_idx_tmp, &list_st,
  					 list) {
  			ret = qla4xxx_get_fwddb_entry(ha,
  						      st_ddb_idx->fw_ddb_idx,
  						      NULL, 0, NULL, &next_idx,
  						      &state, &conn_err, NULL,
  						      NULL);
  			if (ret == QLA_ERROR)
  				continue;
  
  			if (state == DDB_DS_NO_CONNECTION_ACTIVE ||
  			    state == DDB_DS_SESSION_FAILED) {
  				list_del_init(&st_ddb_idx->list);
  				vfree(st_ddb_idx);
  			}
  		}
  		schedule_timeout_uninterruptible(HZ / 10);
  	} while (time_after(wtime, jiffies));
  
  	/* Free up the sendtargets list */
  	list_for_each_entry_safe(st_ddb_idx, st_ddb_idx_tmp, &list_st, list) {
  		list_del_init(&st_ddb_idx->list);
  		vfree(st_ddb_idx);
  	}
  
  	for (idx = 0; idx < max_ddbs; idx = next_idx) {
  		ret = qla4xxx_get_fwddb_entry(ha, idx, fw_ddb_entry,
  					      fw_ddb_dma, NULL,
  					      &next_idx, &state, &conn_err,
  					      NULL, &conn_id);
  		if (ret == QLA_ERROR)
  			break;
  
  		if (qla4xxx_verify_boot_idx(ha, idx) != QLA_SUCCESS)
  			goto continue_next_nt;
  
  		/* Check if NT, then add to list it */
  		if (strlen((char *) fw_ddb_entry->iscsi_name) == 0)
  			goto continue_next_nt;
  
  		if (state == DDB_DS_NO_CONNECTION_ACTIVE ||
  		    state == DDB_DS_SESSION_FAILED) {
  			DEBUG2(ql4_printk(KERN_INFO, ha,
  					  "Adding  DDB to session = 0x%x
  ",
  					  idx));
  			if (is_reset == INIT_ADAPTER) {
  				nt_ddb_idx = vmalloc(fw_idx_size);
  				if (!nt_ddb_idx)
  					break;
  
  				nt_ddb_idx->fw_ddb_idx = idx;
  
  				memcpy(&nt_ddb_idx->fw_ddb, fw_ddb_entry,
  				       sizeof(struct dev_db_entry));
  
  				if (qla4xxx_is_flash_ddb_exists(ha, &list_nt,
  						fw_ddb_entry) == QLA_SUCCESS) {
  					vfree(nt_ddb_idx);
  					goto continue_next_nt;
  				}
  				list_add_tail(&nt_ddb_idx->list, &list_nt);
  			} else if (is_reset == RESET_ADAPTER) {
  				if (qla4xxx_is_session_exists(ha,
  						   fw_ddb_entry) == QLA_SUCCESS)
  					goto continue_next_nt;
  			}
  
  			/* Create session object, with INVALID_ENTRY,
  			 * the targer_id would get set when we issue the login
  			 */
  			cls_sess = iscsi_session_setup(&qla4xxx_iscsi_transport,
  						ha->host, cmds_max,
  						sizeof(struct ddb_entry),
  						sizeof(struct ql4_task_data),
  						initial_cmdsn, INVALID_ENTRY);
  			if (!cls_sess)
  				goto exit_ddb_list;
  
  			/*
  			 * iscsi_session_setup increments the driver reference
  			 * count which wouldn't let the driver to be unloaded.
  			 * so calling module_put function to decrement the
  			 * reference count.
  			 **/
  			module_put(qla4xxx_iscsi_transport.owner);
  			sess = cls_sess->dd_data;
  			ddb_entry = sess->dd_data;
  			ddb_entry->sess = cls_sess;
  
  			cls_sess->recovery_tmo = ql4xsess_recovery_tmo;
  			memcpy(&ddb_entry->fw_ddb_entry, fw_ddb_entry,
  			       sizeof(struct dev_db_entry));
  
  			qla4xxx_setup_flash_ddb_entry(ha, ddb_entry);
  
  			cls_conn = iscsi_conn_setup(cls_sess,
  						    sizeof(struct qla_conn),
  						    conn_id);
  			if (!cls_conn)
  				goto exit_ddb_list;
  
  			ddb_entry->conn = cls_conn;
  
  			/* Setup ep, for displaying attributes in sysfs */
  			ep = qla4xxx_get_ep_fwdb(ha, fw_ddb_entry);
  			if (ep) {
  				ep->conn = cls_conn;
  				cls_conn->ep = ep;
  			} else {
  				DEBUG2(ql4_printk(KERN_ERR, ha,
  						  "Unable to get ep
  "));
  			}
  
  			/* Update sess/conn params */
  			qla4xxx_copy_fwddb_param(ha, fw_ddb_entry, cls_sess,
  						 cls_conn);
  
  			if (is_reset == RESET_ADAPTER) {
  				iscsi_block_session(cls_sess);
  				/* Use the relogin path to discover new devices
  				 *  by short-circuting the logic of setting
  				 *  timer to relogin - instead set the flags
  				 *  to initiate login right away.
  				 */
  				set_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags);
  				set_bit(DF_RELOGIN, &ddb_entry->flags);
  			}
  		}
  continue_next_nt:
  		if (next_idx == 0)
  			break;
  	}
  exit_ddb_list:
  	qla4xxx_free_nt_list(&list_nt);
  	if (fw_ddb_entry)
  		dma_pool_free(ha->fw_ddb_dma_pool, fw_ddb_entry, fw_ddb_dma);
  
  	qla4xxx_free_ddb_index(ha);
  }

  /**
   * qla4xxx_probe_adapter - callback function to probe HBA
   * @pdev: pointer to pci_dev structure
   * @pci_device_id: pointer to pci_device entry
   *
   * This routine will probe for Qlogic 4xxx iSCSI host adapters.
   * It returns zero if successful. It also initializes all data necessary for
   * the driver.
   **/
  static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
  					   const struct pci_device_id *ent)
  {
  	int ret = -ENODEV, status;
  	struct Scsi_Host *host;
  	struct scsi_qla_host *ha;

  	uint8_t init_retry_count = 0;
  	char buf[34];

  	struct qla4_8xxx_legacy_intr_set *nx_legacy_intr;

  	uint32_t dev_state;

  
  	if (pci_enable_device(pdev))
  		return -1;

  	host = iscsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha), 0);

  	if (host == NULL) {
  		printk(KERN_WARNING
  		       "qla4xxx: Couldn't allocate host from scsi layer!
  ");
  		goto probe_disable_device;
  	}
  
  	/* Clear our data area */

  	ha = to_qla_host(host);

  	memset(ha, 0, sizeof(*ha));
  
  	/* Save the information from PCI BIOS.	*/
  	ha->pdev = pdev;
  	ha->host = host;
  	ha->host_no = host->host_no;

  	pci_enable_pcie_error_reporting(pdev);

  	/* Setup Runtime configurable options */
  	if (is_qla8022(ha)) {
  		ha->isp_ops = &qla4_8xxx_isp_ops;
  		rwlock_init(&ha->hw_lock);
  		ha->qdr_sn_window = -1;
  		ha->ddr_mn_window = -1;
  		ha->curr_window = 255;
  		ha->func_num = PCI_FUNC(ha->pdev->devfn);
  		nx_legacy_intr = &legacy_intr[ha->func_num];
  		ha->nx_legacy_intr.int_vec_bit = nx_legacy_intr->int_vec_bit;
  		ha->nx_legacy_intr.tgt_status_reg =
  			nx_legacy_intr->tgt_status_reg;
  		ha->nx_legacy_intr.tgt_mask_reg = nx_legacy_intr->tgt_mask_reg;
  		ha->nx_legacy_intr.pci_int_reg = nx_legacy_intr->pci_int_reg;
  	} else {
  		ha->isp_ops = &qla4xxx_isp_ops;
  	}

  	/* Set EEH reset type to fundamental if required by hba */
  	if (is_qla8022(ha))
  		pdev->needs_freset = 1;

  	/* Configure PCI I/O space. */

  	ret = ha->isp_ops->iospace_config(ha);

  	if (ret)

  		goto probe_failed_ioconfig;

  	ql4_printk(KERN_INFO, ha, "Found an ISP%04x, irq %d, iobase 0x%p
  ",

  		   pdev->device, pdev->irq, ha->reg);
  
  	qla4xxx_config_dma_addressing(ha);
  
  	/* Initialize lists and spinlocks. */

  	INIT_LIST_HEAD(&ha->free_srb_q);
  
  	mutex_init(&ha->mbox_sem);

  	mutex_init(&ha->chap_sem);

  	init_completion(&ha->mbx_intr_comp);

  	init_completion(&ha->disable_acb_comp);

  
  	spin_lock_init(&ha->hardware_lock);

  
  	/* Allocate dma buffers */
  	if (qla4xxx_mem_alloc(ha)) {

  		ql4_printk(KERN_WARNING, ha,
  		    "[ERROR] Failed to allocate memory for adapter
  ");

  
  		ret = -ENOMEM;
  		goto probe_failed;
  	}

  	host->cmd_per_lun = 3;
  	host->max_channel = 0;
  	host->max_lun = MAX_LUNS - 1;
  	host->max_id = MAX_TARGETS;
  	host->max_cmd_len = IOCB_MAX_CDB_LEN;
  	host->can_queue = MAX_SRBS ;
  	host->transportt = qla4xxx_scsi_transport;
  
  	ret = scsi_init_shared_tag_map(host, MAX_SRBS);
  	if (ret) {
  		ql4_printk(KERN_WARNING, ha,
  			   "%s: scsi_init_shared_tag_map failed
  ", __func__);
  		goto probe_failed;
  	}
  
  	pci_set_drvdata(pdev, ha);
  
  	ret = scsi_add_host(host, &pdev->dev);
  	if (ret)
  		goto probe_failed;

  	if (is_qla8022(ha))
  		(void) qla4_8xxx_get_flash_info(ha);

  	/*
  	 * Initialize the Host adapter request/response queues and
  	 * firmware
  	 * NOTE: interrupts enabled upon successful completion
  	 */

  	status = qla4xxx_initialize_adapter(ha, INIT_ADAPTER);

  	while ((!test_bit(AF_ONLINE, &ha->flags)) &&
  	    init_retry_count++ < MAX_INIT_RETRIES) {

  
  		if (is_qla8022(ha)) {
  			qla4_8xxx_idc_lock(ha);
  			dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
  			qla4_8xxx_idc_unlock(ha);
  			if (dev_state == QLA82XX_DEV_FAILED) {
  				ql4_printk(KERN_WARNING, ha, "%s: don't retry "
  				    "initialize adapter. H/W is in failed state
  ",
  				    __func__);
  				break;
  			}
  		}

  		DEBUG2(printk("scsi: %s: retrying adapter initialization "
  			      "(%d)
  ", __func__, init_retry_count));

  
  		if (ha->isp_ops->reset_chip(ha) == QLA_ERROR)
  			continue;

  		status = qla4xxx_initialize_adapter(ha, INIT_ADAPTER);

  	}

  
  	if (!test_bit(AF_ONLINE, &ha->flags)) {

  		ql4_printk(KERN_WARNING, ha, "Failed to initialize adapter
  ");

  		if (is_qla8022(ha) && ql4xdontresethba) {
  			/* Put the device in failed state. */
  			DEBUG2(printk(KERN_ERR "HW STATE: FAILED
  "));
  			qla4_8xxx_idc_lock(ha);
  			qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
  			    QLA82XX_DEV_FAILED);
  			qla4_8xxx_idc_unlock(ha);
  		}

  		ret = -ENODEV;

  		goto remove_host;

  	}

  	/* Startup the kernel thread for this host adapter. */
  	DEBUG2(printk("scsi: %s: Starting kernel thread for "
  		      "qla4xxx_dpc
  ", __func__));
  	sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
  	ha->dpc_thread = create_singlethread_workqueue(buf);
  	if (!ha->dpc_thread) {

  		ql4_printk(KERN_WARNING, ha, "Unable to start DPC thread!
  ");

  		ret = -ENODEV;

  		goto remove_host;

  	}

  	INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);

  	sprintf(buf, "qla4xxx_%lu_task", ha->host_no);
  	ha->task_wq = alloc_workqueue(buf, WQ_MEM_RECLAIM, 1);
  	if (!ha->task_wq) {
  		ql4_printk(KERN_WARNING, ha, "Unable to start task thread!
  ");
  		ret = -ENODEV;
  		goto remove_host;
  	}

  	/* For ISP-82XX, request_irqs is called in qla4_8xxx_load_risc
  	 * (which is called indirectly by qla4xxx_initialize_adapter),
  	 * so that irqs will be registered after crbinit but before
  	 * mbx_intr_enable.
  	 */
  	if (!is_qla8022(ha)) {
  		ret = qla4xxx_request_irqs(ha);
  		if (ret) {
  			ql4_printk(KERN_WARNING, ha, "Failed to reserve "
  			    "interrupt %d already in use.
  ", pdev->irq);

  			goto remove_host;

  		}

  	}

  	pci_save_state(ha->pdev);

  	ha->isp_ops->enable_intrs(ha);

  
  	/* Start timer thread. */
  	qla4xxx_start_timer(ha, qla4xxx_timer, 1);
  
  	set_bit(AF_INIT_DONE, &ha->flags);

  	printk(KERN_INFO
  	       " QLogic iSCSI HBA Driver version: %s
  "
  	       "  QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d
  ",
  	       qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
  	       ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
  	       ha->patch_number, ha->build_number);

  	if (qla4xxx_setup_boot_info(ha))
  		ql4_printk(KERN_ERR, ha, "%s:ISCSI boot info setup failed
  ",
  			   __func__);

  		/* Perform the build ddb list and login to each */
  	qla4xxx_build_ddb_list(ha, INIT_ADAPTER);
  	iscsi_host_for_each_session(ha->host, qla4xxx_login_flash_ddb);
  
  	qla4xxx_create_chap_list(ha);

  	qla4xxx_create_ifaces(ha);

  	return 0;

  remove_host:
  	scsi_remove_host(ha->host);

  probe_failed:
  	qla4xxx_free_adapter(ha);

  
  probe_failed_ioconfig:

  	pci_disable_pcie_error_reporting(pdev);

  	scsi_host_put(ha->host);
  
  probe_disable_device:
  	pci_disable_device(pdev);
  
  	return ret;
  }
  
  /**

   * qla4xxx_prevent_other_port_reinit - prevent other port from re-initialize
   * @ha: pointer to adapter structure
   *
   * Mark the other ISP-4xxx port to indicate that the driver is being removed,
   * so that the other port will not re-initialize while in the process of
   * removing the ha due to driver unload or hba hotplug.
   **/
  static void qla4xxx_prevent_other_port_reinit(struct scsi_qla_host *ha)
  {
  	struct scsi_qla_host *other_ha = NULL;
  	struct pci_dev *other_pdev = NULL;
  	int fn = ISP4XXX_PCI_FN_2;
  
  	/*iscsi function numbers for ISP4xxx is 1 and 3*/
  	if (PCI_FUNC(ha->pdev->devfn) & BIT_1)
  		fn = ISP4XXX_PCI_FN_1;
  
  	other_pdev =
  		pci_get_domain_bus_and_slot(pci_domain_nr(ha->pdev->bus),
  		ha->pdev->bus->number, PCI_DEVFN(PCI_SLOT(ha->pdev->devfn),
  		fn));
  
  	/* Get other_ha if other_pdev is valid and state is enable*/
  	if (other_pdev) {
  		if (atomic_read(&other_pdev->enable_cnt)) {
  			other_ha = pci_get_drvdata(other_pdev);
  			if (other_ha) {
  				set_bit(AF_HA_REMOVAL, &other_ha->flags);
  				DEBUG2(ql4_printk(KERN_INFO, ha, "%s: "
  				    "Prevent %s reinit
  ", __func__,
  				    dev_name(&other_ha->pdev->dev)));
  			}
  		}
  		pci_dev_put(other_pdev);
  	}
  }

  static void qla4xxx_destroy_fw_ddb_session(struct scsi_qla_host *ha)
  {
  	struct ddb_entry *ddb_entry;
  	int options;
  	int idx;
  
  	for (idx = 0; idx < MAX_DDB_ENTRIES; idx++) {
  
  		ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, idx);
  		if ((ddb_entry != NULL) &&
  		    (ddb_entry->ddb_type == FLASH_DDB)) {
  
  			options = LOGOUT_OPTION_CLOSE_SESSION;
  			if (qla4xxx_session_logout_ddb(ha, ddb_entry, options)
  			    == QLA_ERROR)
  				ql4_printk(KERN_ERR, ha, "%s: Logout failed
  ",
  					   __func__);
  
  			qla4xxx_clear_ddb_entry(ha, ddb_entry->fw_ddb_index);
  			/*
  			 * we have decremented the reference count of the driver
  			 * when we setup the session to have the driver unload
  			 * to be seamless without actually destroying the
  			 * session
  			 **/
  			try_module_get(qla4xxx_iscsi_transport.owner);
  			iscsi_destroy_endpoint(ddb_entry->conn->ep);
  			qla4xxx_free_ddb(ha, ddb_entry);
  			iscsi_session_teardown(ddb_entry->sess);
  		}
  	}
  }

  /**

   * qla4xxx_remove_adapter - calback function to remove adapter.
   * @pci_dev: PCI device pointer
   **/
  static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
  {
  	struct scsi_qla_host *ha;
  
  	ha = pci_get_drvdata(pdev);

  	if (!is_qla8022(ha))
  		qla4xxx_prevent_other_port_reinit(ha);

  	/* destroy iface from sysfs */
  	qla4xxx_destroy_ifaces(ha);

  	if ((!ql4xdisablesysfsboot) && ha->boot_kset)