drivers/scsi/be2iscsi/be_iscsi.c - kernel/msm-4.9 - Gitiles

 /**
  * Copyright (C) 2005 - 2010 ServerEngines
  * All rights reserved.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version 2
  * as published by the Free Software Foundation.  The full GNU General
  * Public License is included in this distribution in the file called COPYING.
  *
  * Written by: Jayamohan Kallickal (jayamohank@serverengines.com)
  *
  * Contact Information:
  * linux-drivers@serverengines.com
  *
  * ServerEngines
  * 209 N. Fair Oaks Ave
  * Sunnyvale, CA 94085
  *
  */

 #include <scsi/libiscsi.h>
 #include <scsi/scsi_transport_iscsi.h>
 #include <scsi/scsi_transport.h>
 #include <scsi/scsi_cmnd.h>
 #include <scsi/scsi_device.h>
 #include <scsi/scsi_host.h>
 #include <scsi/scsi.h>

 #include "be_iscsi.h"

 extern struct iscsi_transport beiscsi_iscsi_transport;

 /**
  * beiscsi_session_create - creates a new iscsi session
  * @cmds_max: max commands supported
  * @qdepth: max queue depth supported
  * @initial_cmdsn: initial iscsi CMDSN
  */
 struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep,
 						 u16 cmds_max,
 						 u16 qdepth,
 						 u32 initial_cmdsn)
 {
 	struct Scsi_Host *shost;
 	struct beiscsi_endpoint *beiscsi_ep;
 	struct iscsi_cls_session *cls_session;
 	struct beiscsi_hba *phba;
 	struct iscsi_session *sess;
 	struct beiscsi_session *beiscsi_sess;
 	struct beiscsi_io_task *io_task;

 	SE_DEBUG(DBG_LVL_8, "In beiscsi_session_create\n");

 	if (!ep) {
 		SE_DEBUG(DBG_LVL_1, "beiscsi_session_create: invalid ep\n");
 		return NULL;
 	}
 	beiscsi_ep = ep->dd_data;
 	phba = beiscsi_ep->phba;
 	shost = phba->shost;
 	if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
 		shost_printk(KERN_ERR, shost, "Cannot handle %d cmds."
 			     "Max cmds per session supported is %d. Using %d. "
 			     "\n", cmds_max,
 			      beiscsi_ep->phba->params.wrbs_per_cxn,
 			      beiscsi_ep->phba->params.wrbs_per_cxn);
 		cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
 	}

 	cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
 					  shost, cmds_max,
 					  sizeof(*beiscsi_sess),
 					  sizeof(*io_task),
 					  initial_cmdsn, ISCSI_MAX_TARGET);
 	if (!cls_session)
 		return NULL;
 	sess = cls_session->dd_data;
 	beiscsi_sess = sess->dd_data;
 	beiscsi_sess->bhs_pool =  pci_pool_create("beiscsi_bhs_pool",
 						   phba->pcidev,
 						   sizeof(struct be_cmd_bhs),
 						   64, 0);
 	if (!beiscsi_sess->bhs_pool)
 		goto destroy_sess;

 	return cls_session;
 destroy_sess:
 	iscsi_session_teardown(cls_session);
 	return NULL;
 }

 /**
  * beiscsi_session_destroy - destroys iscsi session
  * @cls_session:	pointer to iscsi cls session
  *
  * Destroys iSCSI session instance and releases
  * resources allocated for it.
  */
 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
 {
 	struct iscsi_session *sess = cls_session->dd_data;
 	struct beiscsi_session *beiscsi_sess = sess->dd_data;

 	SE_DEBUG(DBG_LVL_8, "In beiscsi_session_destroy\n");
 	pci_pool_destroy(beiscsi_sess->bhs_pool);
 	iscsi_session_teardown(cls_session);
 }

 /**
  * beiscsi_conn_create - create an instance of iscsi connection
  * @cls_session: ptr to iscsi_cls_session
  * @cid: iscsi cid
  */
 struct iscsi_cls_conn *
 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
 {
 	struct beiscsi_hba *phba;
 	struct Scsi_Host *shost;
 	struct iscsi_cls_conn *cls_conn;
 	struct beiscsi_conn *beiscsi_conn;
 	struct iscsi_conn *conn;
 	struct iscsi_session *sess;
 	struct beiscsi_session *beiscsi_sess;

 	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_create ,cid"
 		 "from iscsi layer=%d\n", cid);
 	shost = iscsi_session_to_shost(cls_session);
 	phba = iscsi_host_priv(shost);

 	cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
 	if (!cls_conn)
 		return NULL;

 	conn = cls_conn->dd_data;
 	beiscsi_conn = conn->dd_data;
 	beiscsi_conn->ep = NULL;
 	beiscsi_conn->phba = phba;
 	beiscsi_conn->conn = conn;
 	sess = cls_session->dd_data;
 	beiscsi_sess = sess->dd_data;
 	beiscsi_conn->beiscsi_sess = beiscsi_sess;
 	return cls_conn;
 }

 /**
  * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table
  * @beiscsi_conn: The pointer to  beiscsi_conn structure
  * @phba: The phba instance
  * @cid: The cid to free
  */
 static int beiscsi_bindconn_cid(struct beiscsi_hba *phba,
 				struct beiscsi_conn *beiscsi_conn,
 				unsigned int cid)
 {
 	if (phba->conn_table[cid]) {
 		SE_DEBUG(DBG_LVL_1,
 			 "Connection table already occupied. Detected clash\n");
 		return -EINVAL;
 	} else {
 		SE_DEBUG(DBG_LVL_8, "phba->conn_table[%d]=%p(beiscsi_conn)\n",
 			 cid, beiscsi_conn);
 		phba->conn_table[cid] = beiscsi_conn;
 	}
 	return 0;
 }

 /**
  * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
  * @cls_session: pointer to iscsi cls session
  * @cls_conn: pointer to iscsi cls conn
  * @transport_fd: EP handle(64 bit)
  *
  * This function binds the TCP Conn with iSCSI Connection and Session.
  */
 int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
 		      struct iscsi_cls_conn *cls_conn,
 		      u64 transport_fd, int is_leading)
 {
 	struct iscsi_conn *conn = cls_conn->dd_data;
 	struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 	struct Scsi_Host *shost =
 		(struct Scsi_Host *)iscsi_session_to_shost(cls_session);
 	struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
 	struct beiscsi_endpoint *beiscsi_ep;
 	struct iscsi_endpoint *ep;

 	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_bind\n");
 	ep = iscsi_lookup_endpoint(transport_fd);
 	if (!ep)
 		return -EINVAL;

 	beiscsi_ep = ep->dd_data;

 	if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
 		return -EINVAL;

 	if (beiscsi_ep->phba != phba) {
 		SE_DEBUG(DBG_LVL_8,
 			 "beiscsi_ep->hba=%p not equal to phba=%p\n",
 			 beiscsi_ep->phba, phba);
 		return -EEXIST;
 	}

 	beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
 	beiscsi_conn->ep = beiscsi_ep;
 	beiscsi_ep->conn = beiscsi_conn;
 	SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d\n",
 		 beiscsi_conn, conn, beiscsi_ep->ep_cid);
 	return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid);
 }

 /**
  * beiscsi_conn_get_param - get the iscsi parameter
  * @cls_conn: pointer to iscsi cls conn
  * @param: parameter type identifier
  * @buf: buffer pointer
  *
  * returns iscsi parameter
  */
 int beiscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
 			   enum iscsi_param param, char *buf)
 {
 	struct beiscsi_endpoint *beiscsi_ep;
 	struct iscsi_conn *conn = cls_conn->dd_data;
 	struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 	int len = 0;

 	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param);
 	beiscsi_ep = beiscsi_conn->ep;
 	if (!beiscsi_ep) {
 		SE_DEBUG(DBG_LVL_1,
 			 "In beiscsi_conn_get_param , no beiscsi_ep\n");
 		return -ENODEV;
 	}

 	switch (param) {
 	case ISCSI_PARAM_CONN_PORT:
 		len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
 		break;
 	case ISCSI_PARAM_CONN_ADDRESS:
 		if (beiscsi_ep->ip_type == BE2_IPV4)
 			len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
 		else
 			len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
 		break;
 	default:
 		return iscsi_conn_get_param(cls_conn, param, buf);
 	}
 	return len;
 }

 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 		      enum iscsi_param param, char *buf, int buflen)
 {
 	struct iscsi_conn *conn = cls_conn->dd_data;
 	struct iscsi_session *session = conn->session;
 	int ret;

 	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param);
 	ret = iscsi_set_param(cls_conn, param, buf, buflen);
 	if (ret)
 		return ret;
 	/*
 	 * If userspace tried to set the value to higher than we can
 	 * support override here.
 	 */
 	switch (param) {
 	case ISCSI_PARAM_FIRST_BURST:
 		if (session->first_burst > 8192)
 			session->first_burst = 8192;
 		break;
 	case ISCSI_PARAM_MAX_RECV_DLENGTH:
 		if (conn->max_recv_dlength > 65536)
 			conn->max_recv_dlength = 65536;
 		break;
 	case ISCSI_PARAM_MAX_BURST:
 		if (session->max_burst > 262144)
 			session->max_burst = 262144;
 		break;
 	case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 		if ((conn->max_xmit_dlength > 65536) ||
 		    (conn->max_xmit_dlength == 0))
 			conn->max_xmit_dlength = 65536;
 	default:
 		return 0;
 	}

 	return 0;
 }

 /**
  * beiscsi_get_host_param - get the iscsi parameter
  * @shost: pointer to scsi_host structure
  * @param: parameter type identifier
  * @buf: buffer pointer
  *
  * returns host parameter
  */
 int beiscsi_get_host_param(struct Scsi_Host *shost,
 			   enum iscsi_host_param param, char *buf)
 {
 	struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
 	int len = 0;
 	int status;

 	SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param);
 	switch (param) {
 	case ISCSI_HOST_PARAM_HWADDRESS:
 		status = beiscsi_get_macaddr(buf, phba);
 		if (status < 0) {
 			SE_DEBUG(DBG_LVL_1, "beiscsi_get_macaddr Failed\n");
 			return status;
 		}
 		break;
 	default:
 		return iscsi_host_get_param(shost, param, buf);
 	}
 	return len;
 }

 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
 {
 	struct be_cmd_resp_get_mac_addr *resp;
 	struct be_mcc_wrb *wrb;
 	unsigned int tag, wrb_num;
 	unsigned short status, extd_status;
 	struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
 	int rc;

 	if (phba->read_mac_address)
 		return sysfs_format_mac(buf, phba->mac_address,
 					ETH_ALEN);

 	tag = be_cmd_get_mac_addr(phba);
 	if (!tag) {
 		SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed\n");
 		return -EBUSY;
 	} else
 		wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 					 phba->ctrl.mcc_numtag[tag]);

 	wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
 	extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
 	status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
 	if (status || extd_status) {
 		SE_DEBUG(DBG_LVL_1, "Failed to get be_cmd_get_mac_addr"
 				    " status = %d extd_status = %d\n",
 				    status, extd_status);
 		free_mcc_tag(&phba->ctrl, tag);
 		return -EAGAIN;
 	}
 	wrb = queue_get_wrb(mccq, wrb_num);
 	free_mcc_tag(&phba->ctrl, tag);
 	resp = embedded_payload(wrb);
 	memcpy(phba->mac_address, resp->mac_address, ETH_ALEN);
 	rc = sysfs_format_mac(buf, phba->mac_address,
 			       ETH_ALEN);
 	phba->read_mac_address = 1;
 	return rc;
 }


 /**
  * beiscsi_conn_get_stats - get the iscsi stats
  * @cls_conn: pointer to iscsi cls conn
  * @stats: pointer to iscsi_stats structure
  *
  * returns iscsi stats
  */
 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 			    struct iscsi_stats *stats)
 {
 	struct iscsi_conn *conn = cls_conn->dd_data;

 	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n");
 	stats->txdata_octets = conn->txdata_octets;
 	stats->rxdata_octets = conn->rxdata_octets;
 	stats->dataout_pdus = conn->dataout_pdus_cnt;
 	stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
 	stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
 	stats->datain_pdus = conn->datain_pdus_cnt;
 	stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
 	stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
 	stats->r2t_pdus = conn->r2t_pdus_cnt;
 	stats->digest_err = 0;
 	stats->timeout_err = 0;
 	stats->custom_length = 0;
 	strcpy(stats->custom[0].desc, "eh_abort_cnt");
 	stats->custom[0].value = conn->eh_abort_cnt;
 }

 /**
  * beiscsi_set_params_for_offld - get the parameters for offload
  * @beiscsi_conn: pointer to beiscsi_conn
  * @params: pointer to offload_params structure
  */
 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
 					  struct beiscsi_offload_params *params)
 {
 	struct iscsi_conn *conn = beiscsi_conn->conn;
 	struct iscsi_session *session = conn->session;

 	AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
 		      params, session->max_burst);
 	AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 		      max_send_data_segment_length, params,
 		      conn->max_xmit_dlength);
 	AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
 		      params, session->first_burst);
 	AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
 		      session->erl);
 	AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
 		      conn->datadgst_en);
 	AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
 		      conn->hdrdgst_en);
 	AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
 		      session->initial_r2t_en);
 	AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
 		      session->imm_data_en);
 	AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
 		      (conn->exp_statsn - 1));
 }

 /**
  * beiscsi_conn_start - offload of session to chip
  * @cls_conn: pointer to beiscsi_conn
  */
 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 {
 	struct iscsi_conn *conn = cls_conn->dd_data;
 	struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 	struct beiscsi_endpoint *beiscsi_ep;
 	struct beiscsi_offload_params params;

 	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n");
 	memset(&params, 0, sizeof(struct beiscsi_offload_params));
 	beiscsi_ep = beiscsi_conn->ep;
 	if (!beiscsi_ep)
 		SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n");

 	beiscsi_conn->login_in_progress = 0;
 	beiscsi_set_params_for_offld(beiscsi_conn, &params);
 	beiscsi_offload_connection(beiscsi_conn, &params);
 	iscsi_conn_start(cls_conn);
 	return 0;
 }

 /**
  * beiscsi_get_cid - Allocate a cid
  * @phba: The phba instance
  */
 static int beiscsi_get_cid(struct beiscsi_hba *phba)
 {
 	unsigned short cid = 0xFFFF;

 	if (!phba->avlbl_cids)
 		return cid;

 	cid = phba->cid_array[phba->cid_alloc++];
 	if (phba->cid_alloc == phba->params.cxns_per_ctrl)
 		phba->cid_alloc = 0;
 	phba->avlbl_cids--;
 	return cid;
 }

 /**
  * beiscsi_put_cid - Free the cid
  * @phba: The phba for which the cid is being freed
  * @cid: The cid to free
  */
 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
 {
 	phba->avlbl_cids++;
 	phba->cid_array[phba->cid_free++] = cid;
 	if (phba->cid_free == phba->params.cxns_per_ctrl)
 		phba->cid_free = 0;
 }

 /**
  * beiscsi_free_ep - free endpoint
  * @ep:	pointer to iscsi endpoint structure
  */
 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
 {
 	struct beiscsi_hba *phba = beiscsi_ep->phba;

 	beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 	beiscsi_ep->phba = NULL;
 }

 /**
  * beiscsi_open_conn - Ask FW to open a TCP connection
  * @ep:	endpoint to be used
  * @src_addr: The source IP address
  * @dst_addr: The Destination  IP address
  *
  * Asks the FW to open a TCP connection
  */
 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
 			     struct sockaddr *src_addr,
 			     struct sockaddr *dst_addr, int non_blocking)
 {
 	struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 	struct beiscsi_hba *phba = beiscsi_ep->phba;
 	struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
 	struct be_mcc_wrb *wrb;
 	struct tcp_connect_and_offload_out *ptcpcnct_out;
 	unsigned short status, extd_status;
 	struct be_dma_mem nonemb_cmd;
 	unsigned int tag, wrb_num;
 	int ret = -ENOMEM;

 	SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n");
 	beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
 	if (beiscsi_ep->ep_cid == 0xFFFF) {
 		SE_DEBUG(DBG_LVL_1, "No free cid available\n");
 		return ret;
 	}
 	SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d\n",
 		 beiscsi_ep->ep_cid);
 	phba->ep_array[beiscsi_ep->ep_cid -
 		       phba->fw_config.iscsi_cid_start] = ep;
 	if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start +
 				  phba->params.cxns_per_ctrl * 2)) {
 		SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n");
 		beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 		goto free_ep;
 	}

 	beiscsi_ep->cid_vld = 0;
 	nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev,
 				sizeof(struct tcp_connect_and_offload_in),
 				&nonemb_cmd.dma);
 	if (nonemb_cmd.va == NULL) {
 		SE_DEBUG(DBG_LVL_1,
 			 "Failed to allocate memory for mgmt_open_connection"
 			 "\n");
 		beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 		return -ENOMEM;
 	}
 	nonemb_cmd.size = sizeof(struct tcp_connect_and_offload_in);
 	memset(nonemb_cmd.va, 0, nonemb_cmd.size);
 	tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
 	if (!tag) {
 		SE_DEBUG(DBG_LVL_1,
 			 "mgmt_open_connection Failed for cid=%d\n",
 			 beiscsi_ep->ep_cid);
 		beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 		pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 				    nonemb_cmd.va, nonemb_cmd.dma);
 		return -EAGAIN;
 	} else {
 		wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 					 phba->ctrl.mcc_numtag[tag]);
 	}
 	wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
 	extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
 	status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
 	if (status || extd_status) {
 		SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed"
 				    " status = %d extd_status = %d\n",
 				    status, extd_status);
 		beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 		free_mcc_tag(&phba->ctrl, tag);
 		pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 			    nonemb_cmd.va, nonemb_cmd.dma);
 		goto free_ep;
 	} else {
 		wrb = queue_get_wrb(mccq, wrb_num);
 		free_mcc_tag(&phba->ctrl, tag);

 		ptcpcnct_out = embedded_payload(wrb);
 		beiscsi_ep = ep->dd_data;
 		beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
 		beiscsi_ep->cid_vld = 1;
 		SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n");
 	}
 	beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 	pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 			    nonemb_cmd.va, nonemb_cmd.dma);
 	return 0;

 free_ep:
 	beiscsi_free_ep(beiscsi_ep);
 	return -EBUSY;
 }

 /**
  * beiscsi_ep_connect - Ask chip to create TCP Conn
  * @scsi_host: Pointer to scsi_host structure
  * @dst_addr: The IP address of Target
  * @non_blocking: blocking or non-blocking call
  *
  * This routines first asks chip to create a connection and then allocates an EP
  */
 struct iscsi_endpoint *
 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
 		   int non_blocking)
 {
 	struct beiscsi_hba *phba;
 	struct beiscsi_endpoint *beiscsi_ep;
 	struct iscsi_endpoint *ep;
 	int ret;

 	SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect\n");
 	if (shost)
 		phba = iscsi_host_priv(shost);
 	else {
 		ret = -ENXIO;
 		SE_DEBUG(DBG_LVL_1, "shost is NULL\n");
 		return ERR_PTR(ret);
 	}

 	if (phba->state != BE_ADAPTER_UP) {
 		ret = -EBUSY;
 		SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP\n");
 		return ERR_PTR(ret);
 	}

 	ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
 	if (!ep) {
 		ret = -ENOMEM;
 		return ERR_PTR(ret);
 	}

 	beiscsi_ep = ep->dd_data;
 	beiscsi_ep->phba = phba;
 	beiscsi_ep->openiscsi_ep = ep;
 	ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
 	if (ret) {
 		SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn\n");
 		goto free_ep;
 	}

 	return ep;

 free_ep:
 	iscsi_destroy_endpoint(ep);
 	return ERR_PTR(ret);
 }

 /**
  * beiscsi_ep_poll - Poll to see if connection is established
  * @ep:	endpoint to be used
  * @timeout_ms: timeout specified in millisecs
  *
  * Poll to see if TCP connection established
  */
 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
 {
 	struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;

 	SE_DEBUG(DBG_LVL_8, "In  beiscsi_ep_poll\n");
 	if (beiscsi_ep->cid_vld == 1)
 		return 1;
 	else
 		return 0;
 }

 /**
  * beiscsi_close_conn - Upload the  connection
  * @ep: The iscsi endpoint
  * @flag: The type of connection closure
  */
 static int beiscsi_close_conn(struct  beiscsi_endpoint *beiscsi_ep, int flag)
 {
 	int ret = 0;
 	unsigned int tag;
 	struct beiscsi_hba *phba = beiscsi_ep->phba;

 	tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag);
 	if (!tag) {
 		SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x\n",
 			 beiscsi_ep->ep_cid);
 		ret = -EAGAIN;
 	} else {
 		wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 					 phba->ctrl.mcc_numtag[tag]);
 		free_mcc_tag(&phba->ctrl, tag);
 	}
 	return ret;
 }

 /**
  * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table
  * @phba: The phba instance
  * @cid: The cid to free
  */
 static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba,
 				      unsigned int cid)
 {
 	if (phba->conn_table[cid])
 		phba->conn_table[cid] = NULL;
 	else {
 		SE_DEBUG(DBG_LVL_8, "Connection table Not occupied.\n");
 		return -EINVAL;
 	}
 	return 0;
 }

 /**
  * beiscsi_ep_disconnect - Tears down the TCP connection
  * @ep:	endpoint to be used
  *
  * Tears down the TCP connection
  */
 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
 {
 	struct beiscsi_conn *beiscsi_conn;
 	struct beiscsi_endpoint *beiscsi_ep;
 	struct beiscsi_hba *phba;
 	unsigned int tag;
 	unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH;

 	beiscsi_ep = ep->dd_data;
 	phba = beiscsi_ep->phba;
 	SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n",
 			     beiscsi_ep->ep_cid);

 	if (!beiscsi_ep->conn) {
 		SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect, no "
 			 "beiscsi_ep\n");
 		return;
 	}
 	beiscsi_conn = beiscsi_ep->conn;
 	iscsi_suspend_queue(beiscsi_conn->conn);

 	SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect ep_cid = %d\n",
 		 beiscsi_ep->ep_cid);

 	tag = mgmt_invalidate_connection(phba, beiscsi_ep,
 					    beiscsi_ep->ep_cid, 1,
 					    savecfg_flag);
 	if (!tag) {
 		SE_DEBUG(DBG_LVL_1,
 			 "mgmt_invalidate_connection Failed for cid=%d\n",
 			  beiscsi_ep->ep_cid);
 	} else {
 		wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 					 phba->ctrl.mcc_numtag[tag]);
 		free_mcc_tag(&phba->ctrl, tag);
 	}

 	beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL);
 	beiscsi_free_ep(beiscsi_ep);
 	beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid);
 	iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
 }
	/**
	* Copyright (C) 2005 - 2010 ServerEngines
	* All rights reserved.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License version 2
	* as published by the Free Software Foundation. The full GNU General
	* Public License is included in this distribution in the file called COPYING.
	*
	* Written by: Jayamohan Kallickal (jayamohank@serverengines.com)
	*
	* Contact Information:
	* linux-drivers@serverengines.com
	*
	* ServerEngines
	* 209 N. Fair Oaks Ave
	* Sunnyvale, CA 94085
	*
	*/

	#include <scsi/libiscsi.h>
	#include <scsi/scsi_transport_iscsi.h>
	#include <scsi/scsi_transport.h>
	#include <scsi/scsi_cmnd.h>
	#include <scsi/scsi_device.h>
	#include <scsi/scsi_host.h>
	#include <scsi/scsi.h>

	#include "be_iscsi.h"

	extern struct iscsi_transport beiscsi_iscsi_transport;

	/**
	* beiscsi_session_create - creates a new iscsi session
	* @cmds_max: max commands supported
	* @qdepth: max queue depth supported
	* @initial_cmdsn: initial iscsi CMDSN
	*/
	struct iscsi_cls_session beiscsi_session_create(struct iscsi_endpoint ep,
	u16 cmds_max,
	u16 qdepth,
	u32 initial_cmdsn)
	{
	struct Scsi_Host *shost;
	struct beiscsi_endpoint *beiscsi_ep;
	struct iscsi_cls_session *cls_session;
	struct beiscsi_hba *phba;
	struct iscsi_session *sess;
	struct beiscsi_session *beiscsi_sess;
	struct beiscsi_io_task *io_task;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_session_create\n");

	if (!ep) {
	SE_DEBUG(DBG_LVL_1, "beiscsi_session_create: invalid ep\n");
	return NULL;
	}
	beiscsi_ep = ep->dd_data;
	phba = beiscsi_ep->phba;
	shost = phba->shost;
	if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
	shost_printk(KERN_ERR, shost, "Cannot handle %d cmds."
	"Max cmds per session supported is %d. Using %d. "
	"\n", cmds_max,
	beiscsi_ep->phba->params.wrbs_per_cxn,
	beiscsi_ep->phba->params.wrbs_per_cxn);
	cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
	}

	cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
	shost, cmds_max,
	sizeof(*beiscsi_sess),
	sizeof(*io_task),
	initial_cmdsn, ISCSI_MAX_TARGET);
	if (!cls_session)
	return NULL;
	sess = cls_session->dd_data;
	beiscsi_sess = sess->dd_data;
	beiscsi_sess->bhs_pool = pci_pool_create("beiscsi_bhs_pool",
	phba->pcidev,
	sizeof(struct be_cmd_bhs),
	64, 0);
	if (!beiscsi_sess->bhs_pool)
	goto destroy_sess;

	return cls_session;
	destroy_sess:
	iscsi_session_teardown(cls_session);
	return NULL;
	}

	/**
	* beiscsi_session_destroy - destroys iscsi session
	* @cls_session: pointer to iscsi cls session
	*
	* Destroys iSCSI session instance and releases
	* resources allocated for it.
	*/
	void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
	{
	struct iscsi_session *sess = cls_session->dd_data;
	struct beiscsi_session *beiscsi_sess = sess->dd_data;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_session_destroy\n");
	pci_pool_destroy(beiscsi_sess->bhs_pool);
	iscsi_session_teardown(cls_session);
	}

	/**
	* beiscsi_conn_create - create an instance of iscsi connection
	* @cls_session: ptr to iscsi_cls_session
	* @cid: iscsi cid
	*/
	struct iscsi_cls_conn *
	beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
	{
	struct beiscsi_hba *phba;
	struct Scsi_Host *shost;
	struct iscsi_cls_conn *cls_conn;
	struct beiscsi_conn *beiscsi_conn;
	struct iscsi_conn *conn;
	struct iscsi_session *sess;
	struct beiscsi_session *beiscsi_sess;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_create ,cid"
	"from iscsi layer=%d\n", cid);
	shost = iscsi_session_to_shost(cls_session);
	phba = iscsi_host_priv(shost);

	cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
	if (!cls_conn)
	return NULL;

	conn = cls_conn->dd_data;
	beiscsi_conn = conn->dd_data;
	beiscsi_conn->ep = NULL;
	beiscsi_conn->phba = phba;
	beiscsi_conn->conn = conn;
	sess = cls_session->dd_data;
	beiscsi_sess = sess->dd_data;
	beiscsi_conn->beiscsi_sess = beiscsi_sess;
	return cls_conn;
	}

	/**
	* beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table
	* @beiscsi_conn: The pointer to beiscsi_conn structure
	* @phba: The phba instance
	* @cid: The cid to free
	*/
	static int beiscsi_bindconn_cid(struct beiscsi_hba *phba,
	struct beiscsi_conn *beiscsi_conn,
	unsigned int cid)
	{
	if (phba->conn_table[cid]) {
	SE_DEBUG(DBG_LVL_1,
	"Connection table already occupied. Detected clash\n");
	return -EINVAL;
	} else {
	SE_DEBUG(DBG_LVL_8, "phba->conn_table[%d]=%p(beiscsi_conn)\n",
	cid, beiscsi_conn);
	phba->conn_table[cid] = beiscsi_conn;
	}
	return 0;
	}

	/**
	* beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
	* @cls_session: pointer to iscsi cls session
	* @cls_conn: pointer to iscsi cls conn
	* @transport_fd: EP handle(64 bit)
	*
	* This function binds the TCP Conn with iSCSI Connection and Session.
	*/
	int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
	struct iscsi_cls_conn *cls_conn,
	u64 transport_fd, int is_leading)
	{
	struct iscsi_conn *conn = cls_conn->dd_data;
	struct beiscsi_conn *beiscsi_conn = conn->dd_data;
	struct Scsi_Host *shost =
	(struct Scsi_Host *)iscsi_session_to_shost(cls_session);
	struct beiscsi_hba phba = (struct beiscsi_hba )iscsi_host_priv(shost);
	struct beiscsi_endpoint *beiscsi_ep;
	struct iscsi_endpoint *ep;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_bind\n");
	ep = iscsi_lookup_endpoint(transport_fd);
	if (!ep)
	return -EINVAL;

	beiscsi_ep = ep->dd_data;

	if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
	return -EINVAL;

	if (beiscsi_ep->phba != phba) {
	SE_DEBUG(DBG_LVL_8,
	"beiscsi_ep->hba=%p not equal to phba=%p\n",
	beiscsi_ep->phba, phba);
	return -EEXIST;
	}

	beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
	beiscsi_conn->ep = beiscsi_ep;
	beiscsi_ep->conn = beiscsi_conn;
	SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d\n",
	beiscsi_conn, conn, beiscsi_ep->ep_cid);
	return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid);
	}

	/**
	* beiscsi_conn_get_param - get the iscsi parameter
	* @cls_conn: pointer to iscsi cls conn
	* @param: parameter type identifier
	* @buf: buffer pointer
	*
	* returns iscsi parameter
	*/
	int beiscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
	enum iscsi_param param, char *buf)
	{
	struct beiscsi_endpoint *beiscsi_ep;
	struct iscsi_conn *conn = cls_conn->dd_data;
	struct beiscsi_conn *beiscsi_conn = conn->dd_data;
	int len = 0;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param);
	beiscsi_ep = beiscsi_conn->ep;
	if (!beiscsi_ep) {
	SE_DEBUG(DBG_LVL_1,
	"In beiscsi_conn_get_param , no beiscsi_ep\n");
	return -ENODEV;
	}

	switch (param) {
	case ISCSI_PARAM_CONN_PORT:
	len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
	break;
	case ISCSI_PARAM_CONN_ADDRESS:
	if (beiscsi_ep->ip_type == BE2_IPV4)
	len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
	else
	len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
	break;
	default:
	return iscsi_conn_get_param(cls_conn, param, buf);
	}
	return len;
	}

	int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
	enum iscsi_param param, char *buf, int buflen)
	{
	struct iscsi_conn *conn = cls_conn->dd_data;
	struct iscsi_session *session = conn->session;
	int ret;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param);
	ret = iscsi_set_param(cls_conn, param, buf, buflen);
	if (ret)
	return ret;
	/*
	* If userspace tried to set the value to higher than we can
	* support override here.
	*/
	switch (param) {
	case ISCSI_PARAM_FIRST_BURST:
	if (session->first_burst > 8192)
	session->first_burst = 8192;
	break;
	case ISCSI_PARAM_MAX_RECV_DLENGTH:
	if (conn->max_recv_dlength > 65536)
	conn->max_recv_dlength = 65536;
	break;
	case ISCSI_PARAM_MAX_BURST:
	if (session->max_burst > 262144)
	session->max_burst = 262144;
	break;
	case ISCSI_PARAM_MAX_XMIT_DLENGTH:
	if ((conn->max_xmit_dlength > 65536) \|\|
	(conn->max_xmit_dlength == 0))
	conn->max_xmit_dlength = 65536;
	default:
	return 0;
	}

	return 0;
	}

	/**
	* beiscsi_get_host_param - get the iscsi parameter
	* @shost: pointer to scsi_host structure
	* @param: parameter type identifier
	* @buf: buffer pointer
	*
	* returns host parameter
	*/
	int beiscsi_get_host_param(struct Scsi_Host *shost,
	enum iscsi_host_param param, char *buf)
	{
	struct beiscsi_hba phba = (struct beiscsi_hba )iscsi_host_priv(shost);
	int len = 0;
	int status;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param);
	switch (param) {
	case ISCSI_HOST_PARAM_HWADDRESS:
	status = beiscsi_get_macaddr(buf, phba);
	if (status < 0) {
	SE_DEBUG(DBG_LVL_1, "beiscsi_get_macaddr Failed\n");
	return status;
	}
	break;
	default:
	return iscsi_host_get_param(shost, param, buf);
	}
	return len;
	}

	int beiscsi_get_macaddr(char buf, struct beiscsi_hba phba)
	{
	struct be_cmd_resp_get_mac_addr *resp;
	struct be_mcc_wrb *wrb;
	unsigned int tag, wrb_num;
	unsigned short status, extd_status;
	struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
	int rc;

	if (phba->read_mac_address)
	return sysfs_format_mac(buf, phba->mac_address,
	ETH_ALEN);

	tag = be_cmd_get_mac_addr(phba);
	if (!tag) {
	SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed\n");
	return -EBUSY;
	} else
	wait_event_interruptible(phba->ctrl.mcc_wait[tag],
	phba->ctrl.mcc_numtag[tag]);

	wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
	extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
	status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
	if (status \|\| extd_status) {
	SE_DEBUG(DBG_LVL_1, "Failed to get be_cmd_get_mac_addr"
	" status = %d extd_status = %d\n",
	status, extd_status);
	free_mcc_tag(&phba->ctrl, tag);
	return -EAGAIN;
	}
	wrb = queue_get_wrb(mccq, wrb_num);
	free_mcc_tag(&phba->ctrl, tag);
	resp = embedded_payload(wrb);
	memcpy(phba->mac_address, resp->mac_address, ETH_ALEN);
	rc = sysfs_format_mac(buf, phba->mac_address,
	ETH_ALEN);
	phba->read_mac_address = 1;
	return rc;
	}


	/**
	* beiscsi_conn_get_stats - get the iscsi stats
	* @cls_conn: pointer to iscsi cls conn
	* @stats: pointer to iscsi_stats structure
	*
	* returns iscsi stats
	*/
	void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
	struct iscsi_stats *stats)
	{
	struct iscsi_conn *conn = cls_conn->dd_data;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n");
	stats->txdata_octets = conn->txdata_octets;
	stats->rxdata_octets = conn->rxdata_octets;
	stats->dataout_pdus = conn->dataout_pdus_cnt;
	stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
	stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
	stats->datain_pdus = conn->datain_pdus_cnt;
	stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
	stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
	stats->r2t_pdus = conn->r2t_pdus_cnt;
	stats->digest_err = 0;
	stats->timeout_err = 0;
	stats->custom_length = 0;
	strcpy(stats->custom[0].desc, "eh_abort_cnt");
	stats->custom[0].value = conn->eh_abort_cnt;
	}

	/**
	* beiscsi_set_params_for_offld - get the parameters for offload
	* @beiscsi_conn: pointer to beiscsi_conn
	* @params: pointer to offload_params structure
	*/
	static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
	struct beiscsi_offload_params *params)
	{
	struct iscsi_conn *conn = beiscsi_conn->conn;
	struct iscsi_session *session = conn->session;

	AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
	params, session->max_burst);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params,
	max_send_data_segment_length, params,
	conn->max_xmit_dlength);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
	params, session->first_burst);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
	session->erl);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
	conn->datadgst_en);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
	conn->hdrdgst_en);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
	session->initial_r2t_en);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
	session->imm_data_en);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
	(conn->exp_statsn - 1));
	}

	/**
	* beiscsi_conn_start - offload of session to chip
	* @cls_conn: pointer to beiscsi_conn
	*/
	int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
	{
	struct iscsi_conn *conn = cls_conn->dd_data;
	struct beiscsi_conn *beiscsi_conn = conn->dd_data;
	struct beiscsi_endpoint *beiscsi_ep;
	struct beiscsi_offload_params params;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n");
	memset(&params, 0, sizeof(struct beiscsi_offload_params));
	beiscsi_ep = beiscsi_conn->ep;
	if (!beiscsi_ep)
	SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n");

	beiscsi_conn->login_in_progress = 0;
	beiscsi_set_params_for_offld(beiscsi_conn, &params);
	beiscsi_offload_connection(beiscsi_conn, &params);
	iscsi_conn_start(cls_conn);
	return 0;
	}

	/**
	* beiscsi_get_cid - Allocate a cid
	* @phba: The phba instance
	*/
	static int beiscsi_get_cid(struct beiscsi_hba *phba)
	{
	unsigned short cid = 0xFFFF;

	if (!phba->avlbl_cids)
	return cid;

	cid = phba->cid_array[phba->cid_alloc++];
	if (phba->cid_alloc == phba->params.cxns_per_ctrl)
	phba->cid_alloc = 0;
	phba->avlbl_cids--;
	return cid;
	}

	/**
	* beiscsi_put_cid - Free the cid
	* @phba: The phba for which the cid is being freed
	* @cid: The cid to free
	*/
	static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
	{
	phba->avlbl_cids++;
	phba->cid_array[phba->cid_free++] = cid;
	if (phba->cid_free == phba->params.cxns_per_ctrl)
	phba->cid_free = 0;
	}

	/**
	* beiscsi_free_ep - free endpoint
	* @ep: pointer to iscsi endpoint structure
	*/
	static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
	{
	struct beiscsi_hba *phba = beiscsi_ep->phba;

	beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
	beiscsi_ep->phba = NULL;
	}

	/**
	* beiscsi_open_conn - Ask FW to open a TCP connection
	* @ep: endpoint to be used
	* @src_addr: The source IP address
	* @dst_addr: The Destination IP address
	*
	* Asks the FW to open a TCP connection
	*/
	static int beiscsi_open_conn(struct iscsi_endpoint *ep,
	struct sockaddr *src_addr,
	struct sockaddr *dst_addr, int non_blocking)
	{
	struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
	struct beiscsi_hba *phba = beiscsi_ep->phba;
	struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
	struct be_mcc_wrb *wrb;
	struct tcp_connect_and_offload_out *ptcpcnct_out;
	unsigned short status, extd_status;
	struct be_dma_mem nonemb_cmd;
	unsigned int tag, wrb_num;
	int ret = -ENOMEM;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n");
	beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
	if (beiscsi_ep->ep_cid == 0xFFFF) {
	SE_DEBUG(DBG_LVL_1, "No free cid available\n");
	return ret;
	}
	SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d\n",
	beiscsi_ep->ep_cid);
	phba->ep_array[beiscsi_ep->ep_cid -
	phba->fw_config.iscsi_cid_start] = ep;
	if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start +
	phba->params.cxns_per_ctrl * 2)) {
	SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n");
	beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
	goto free_ep;
	}

	beiscsi_ep->cid_vld = 0;
	nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev,
	sizeof(struct tcp_connect_and_offload_in),
	&nonemb_cmd.dma);
	if (nonemb_cmd.va == NULL) {
	SE_DEBUG(DBG_LVL_1,
	"Failed to allocate memory for mgmt_open_connection"
	"\n");
	beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
	return -ENOMEM;
	}
	nonemb_cmd.size = sizeof(struct tcp_connect_and_offload_in);
	memset(nonemb_cmd.va, 0, nonemb_cmd.size);
	tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
	if (!tag) {
	SE_DEBUG(DBG_LVL_1,
	"mgmt_open_connection Failed for cid=%d\n",
	beiscsi_ep->ep_cid);
	beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
	pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
	nonemb_cmd.va, nonemb_cmd.dma);
	return -EAGAIN;
	} else {
	wait_event_interruptible(phba->ctrl.mcc_wait[tag],
	phba->ctrl.mcc_numtag[tag]);
	}
	wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
	extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
	status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
	if (status \|\| extd_status) {
	SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed"
	" status = %d extd_status = %d\n",
	status, extd_status);
	beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
	free_mcc_tag(&phba->ctrl, tag);
	pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
	nonemb_cmd.va, nonemb_cmd.dma);
	goto free_ep;
	} else {
	wrb = queue_get_wrb(mccq, wrb_num);
	free_mcc_tag(&phba->ctrl, tag);

	ptcpcnct_out = embedded_payload(wrb);
	beiscsi_ep = ep->dd_data;
	beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
	beiscsi_ep->cid_vld = 1;
	SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n");
	}
	beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
	pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
	nonemb_cmd.va, nonemb_cmd.dma);
	return 0;

	free_ep:
	beiscsi_free_ep(beiscsi_ep);
	return -EBUSY;
	}

	/**
	* beiscsi_ep_connect - Ask chip to create TCP Conn
	* @scsi_host: Pointer to scsi_host structure
	* @dst_addr: The IP address of Target
	* @non_blocking: blocking or non-blocking call
	*
	* This routines first asks chip to create a connection and then allocates an EP
	*/
	struct iscsi_endpoint *
	beiscsi_ep_connect(struct Scsi_Host shost, struct sockaddr dst_addr,
	int non_blocking)
	{
	struct beiscsi_hba *phba;
	struct beiscsi_endpoint *beiscsi_ep;
	struct iscsi_endpoint *ep;
	int ret;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect\n");
	if (shost)
	phba = iscsi_host_priv(shost);
	else {
	ret = -ENXIO;
	SE_DEBUG(DBG_LVL_1, "shost is NULL\n");
	return ERR_PTR(ret);
	}

	if (phba->state != BE_ADAPTER_UP) {
	ret = -EBUSY;
	SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP\n");
	return ERR_PTR(ret);
	}

	ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
	if (!ep) {
	ret = -ENOMEM;
	return ERR_PTR(ret);
	}

	beiscsi_ep = ep->dd_data;
	beiscsi_ep->phba = phba;
	beiscsi_ep->openiscsi_ep = ep;
	ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
	if (ret) {
	SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn\n");
	goto free_ep;
	}

	return ep;

	free_ep:
	iscsi_destroy_endpoint(ep);
	return ERR_PTR(ret);
	}

	/**
	* beiscsi_ep_poll - Poll to see if connection is established
	* @ep: endpoint to be used
	* @timeout_ms: timeout specified in millisecs
	*
	* Poll to see if TCP connection established
	*/
	int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
	{
	struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_poll\n");
	if (beiscsi_ep->cid_vld == 1)
	return 1;
	else
	return 0;
	}

	/**
	* beiscsi_close_conn - Upload the connection
	* @ep: The iscsi endpoint
	* @flag: The type of connection closure
	*/
	static int beiscsi_close_conn(struct beiscsi_endpoint *beiscsi_ep, int flag)
	{
	int ret = 0;
	unsigned int tag;
	struct beiscsi_hba *phba = beiscsi_ep->phba;

	tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag);
	if (!tag) {
	SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x\n",
	beiscsi_ep->ep_cid);
	ret = -EAGAIN;
	} else {
	wait_event_interruptible(phba->ctrl.mcc_wait[tag],
	phba->ctrl.mcc_numtag[tag]);
	free_mcc_tag(&phba->ctrl, tag);
	}
	return ret;
	}

	/**
	* beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table
	* @phba: The phba instance
	* @cid: The cid to free
	*/
	static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba,
	unsigned int cid)
	{
	if (phba->conn_table[cid])
	phba->conn_table[cid] = NULL;
	else {
	SE_DEBUG(DBG_LVL_8, "Connection table Not occupied.\n");
	return -EINVAL;
	}
	return 0;
	}

	/**
	* beiscsi_ep_disconnect - Tears down the TCP connection
	* @ep: endpoint to be used
	*
	* Tears down the TCP connection
	*/
	void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
	{
	struct beiscsi_conn *beiscsi_conn;
	struct beiscsi_endpoint *beiscsi_ep;
	struct beiscsi_hba *phba;
	unsigned int tag;
	unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH;

	beiscsi_ep = ep->dd_data;
	phba = beiscsi_ep->phba;
	SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n",
	beiscsi_ep->ep_cid);

	if (!beiscsi_ep->conn) {
	SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect, no "
	"beiscsi_ep\n");
	return;
	}
	beiscsi_conn = beiscsi_ep->conn;
	iscsi_suspend_queue(beiscsi_conn->conn);

	SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect ep_cid = %d\n",
	beiscsi_ep->ep_cid);

	tag = mgmt_invalidate_connection(phba, beiscsi_ep,
	beiscsi_ep->ep_cid, 1,
	savecfg_flag);
	if (!tag) {
	SE_DEBUG(DBG_LVL_1,
	"mgmt_invalidate_connection Failed for cid=%d\n",
	beiscsi_ep->ep_cid);
	} else {
	wait_event_interruptible(phba->ctrl.mcc_wait[tag],
	phba->ctrl.mcc_numtag[tag]);
	free_mcc_tag(&phba->ctrl, tag);
	}

	beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL);
	beiscsi_free_ep(beiscsi_ep);
	beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid);
	iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
	}