[SCSI] bnx2i: Add bnx2i iSCSI driver.

New iSCSI driver for Broadcom BNX2 devices.  The driver interfaces with
the CNIC driver to access the hardware.

Signed-off-by: Anil Veerabhadrappa <anilgv@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 2064 insertions, 0 deletions

diff --git a/drivers/scsi/bnx2i/bnx2i_iscsi.c b/drivers/scsi/bnx2i/bnx2i_iscsi.c
new file mode 100644
index 000000000000..f7412196f2f8
--- /dev/null
+++ b/drivers/scsi/bnx2i/bnx2i_iscsi.c
@@ -0,0 +1,2064 @@
+/*
+ * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver.
+ *
+ * Copyright (c) 2006 - 2009 Broadcom Corporation
+ * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
+ * Copyright (c) 2007, 2008 Mike Christie
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
+ */
+
+#include <scsi/scsi_tcq.h>
+#include <scsi/libiscsi.h>
+#include "bnx2i.h"
+
+struct scsi_transport_template *bnx2i_scsi_xport_template;
+struct iscsi_transport bnx2i_iscsi_transport;
+static struct scsi_host_template bnx2i_host_template;
+
+/*
+ * Global endpoint resource info
+ */
+static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
+
+
+static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
+{
+	int retval = 0;
+
+	if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
+	    test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
+	    test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
+		retval = -EPERM;
+	return retval;
+}
+
+/**
+ * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
+ * @cmd:		iscsi cmd struct pointer
+ * @buf_off:		absolute buffer offset
+ * @start_bd_off:	u32 pointer to return the offset within the BD
+ *			indicated by 'start_bd_idx' on which 'buf_off' falls
+ * @start_bd_idx:	index of the BD on which 'buf_off' falls
+ *
+ * identifies & marks various bd info for scsi command's imm data,
+ * unsolicited data and the first solicited data seq.
+ */
+static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
+				       u32 *start_bd_off, u32 *start_bd_idx)
+{
+	struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
+	u32 cur_offset = 0;
+	u32 cur_bd_idx = 0;
+
+	if (buf_off) {
+		while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
+			cur_offset += bd_tbl->buffer_length;
+			cur_bd_idx++;
+			bd_tbl++;
+		}
+	}
+
+	*start_bd_off = buf_off - cur_offset;
+	*start_bd_idx = cur_bd_idx;
+}
+
+/**
+ * bnx2i_setup_write_cmd_bd_info - sets up BD various information
+ * @task:	transport layer's cmd struct pointer
+ *
+ * identifies & marks various bd info for scsi command's immediate data,
+ * unsolicited data and first solicited data seq which includes BD start
+ * index & BD buf off. his function takes into account iscsi parameter such
+ * as immediate data and unsolicited data is support on this connection.
+ */
+static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
+{
+	struct bnx2i_cmd *cmd = task->dd_data;
+	u32 start_bd_offset;
+	u32 start_bd_idx;
+	u32 buffer_offset = 0;
+	u32 cmd_len = cmd->req.total_data_transfer_length;
+
+	/* if ImmediateData is turned off & IntialR2T is turned on,
+	 * there will be no immediate or unsolicited data, just return.
+	 */
+	if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
+		return;
+
+	/* Immediate data */
+	buffer_offset += task->imm_count;
+	if (task->imm_count == cmd_len)
+		return;
+
+	if (iscsi_task_has_unsol_data(task)) {
+		bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
+					   &start_bd_offset, &start_bd_idx);
+		cmd->req.ud_buffer_offset = start_bd_offset;
+		cmd->req.ud_start_bd_index = start_bd_idx;
+		buffer_offset += task->unsol_r2t.data_length;
+	}
+
+	if (buffer_offset != cmd_len) {
+		bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
+					   &start_bd_offset, &start_bd_idx);
+		if ((start_bd_offset > task->conn->session->first_burst) ||
+		    (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
+			int i = 0;
+
+			iscsi_conn_printk(KERN_ALERT, task->conn,
+					  "bnx2i- error, buf offset 0x%x "
+					  "bd_valid %d use_sg %d\n",
+					  buffer_offset, cmd->io_tbl.bd_valid,
+					  scsi_sg_count(cmd->scsi_cmd));
+			for (i = 0; i < cmd->io_tbl.bd_valid; i++)
+				iscsi_conn_printk(KERN_ALERT, task->conn,
+						  "bnx2i err, bd[%d]: len %x\n",
+						  i, cmd->io_tbl.bd_tbl[i].\
+						  buffer_length);
+		}
+		cmd->req.sd_buffer_offset = start_bd_offset;
+		cmd->req.sd_start_bd_index = start_bd_idx;
+	}
+}
+
+
+
+/**
+ * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
+ * @hba:	adapter instance
+ * @cmd:	iscsi cmd struct pointer
+ *
+ * map SG list
+ */
+static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
+{
+	struct scsi_cmnd *sc = cmd->scsi_cmd;
+	struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
+	struct scatterlist *sg;
+	int byte_count = 0;
+	int bd_count = 0;
+	int sg_count;
+	int sg_len;
+	u64 addr;
+	int i;
+
+	BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
+
+	sg_count = scsi_dma_map(sc);
+
+	scsi_for_each_sg(sc, sg, sg_count, i) {
+		sg_len = sg_dma_len(sg);
+		addr = (u64) sg_dma_address(sg);
+		bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
+		bd[bd_count].buffer_addr_hi = addr >> 32;
+		bd[bd_count].buffer_length = sg_len;
+		bd[bd_count].flags = 0;
+		if (bd_count == 0)
+			bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
+
+		byte_count += sg_len;
+		bd_count++;
+	}
+
+	if (bd_count)
+		bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
+
+	BUG_ON(byte_count != scsi_bufflen(sc));
+	return bd_count;
+}
+
+/**
+ * bnx2i_iscsi_map_sg_list - maps SG list
+ * @cmd:	iscsi cmd struct pointer
+ *
+ * creates BD list table for the command
+ */
+static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
+{
+	int bd_count;
+
+	bd_count  = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
+	if (!bd_count) {
+		struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
+
+		bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
+		bd[0].buffer_length = bd[0].flags = 0;
+	}
+	cmd->io_tbl.bd_valid = bd_count;
+}
+
+
+/**
+ * bnx2i_iscsi_unmap_sg_list - unmaps SG list
+ * @cmd:	iscsi cmd struct pointer
+ *
+ * unmap IO buffers and invalidate the BD table
+ */
+void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
+{
+	struct scsi_cmnd *sc = cmd->scsi_cmd;
+
+	if (cmd->io_tbl.bd_valid && sc) {
+		scsi_dma_unmap(sc);
+		cmd->io_tbl.bd_valid = 0;
+	}
+}
+
+static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
+{
+	memset(&cmd->req, 0x00, sizeof(cmd->req));
+	cmd->req.op_code = 0xFF;
+	cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
+	cmd->req.bd_list_addr_hi =
+		(u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
+
+}
+
+
+/**
+ * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
+ * @hba:	pointer to adapter instance
+ * @conn:	pointer to iscsi connection
+ * @iscsi_cid:	iscsi context ID, range 0 - (MAX_CONN - 1)
+ *
+ * update iscsi cid table entry with connection pointer. This enables
+ *	driver to quickly get hold of connection structure pointer in
+ *	completion/interrupt thread using iscsi context ID
+ */
+static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
+					struct bnx2i_conn *bnx2i_conn,
+					u32 iscsi_cid)
+{
+	if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
+		iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
+				 "conn bind - entry #%d not free\n", iscsi_cid);
+		return -EBUSY;
+	}
+
+	hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
+	return 0;
+}
+
+
+/**
+ * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
+ * @hba:	pointer to adapter instance
+ * @iscsi_cid:	iscsi context ID, range 0 - (MAX_CONN - 1)
+ */
+struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
+					  u16 iscsi_cid)
+{
+	if (!hba->cid_que.conn_cid_tbl) {
+		printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
+		return NULL;
+
+	} else if (iscsi_cid >= hba->max_active_conns) {
+		printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
+		return NULL;
+	}
+	return hba->cid_que.conn_cid_tbl[iscsi_cid];
+}
+
+
+/**
+ * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
+ * @hba:	pointer to adapter instance
+ */
+static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
+{
+	int idx;
+
+	if (!hba->cid_que.cid_free_cnt)
+		return -1;
+
+	idx = hba->cid_que.cid_q_cons_idx;
+	hba->cid_que.cid_q_cons_idx++;
+	if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
+		hba->cid_que.cid_q_cons_idx = 0;
+
+	hba->cid_que.cid_free_cnt--;
+	return hba->cid_que.cid_que[idx];
+}
+
+
+/**
+ * bnx2i_free_iscsi_cid - returns tcp port to free list
+ * @hba: 		pointer to adapter instance
+ * @iscsi_cid:		iscsi context ID to free
+ */
+static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
+{
+	int idx;
+
+	if (iscsi_cid == (u16) -1)
+		return;
+
+	hba->cid_que.cid_free_cnt++;
+
+	idx = hba->cid_que.cid_q_prod_idx;
+	hba->cid_que.cid_que[idx] = iscsi_cid;
+	hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
+	hba->cid_que.cid_q_prod_idx++;
+	if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
+		hba->cid_que.cid_q_prod_idx = 0;
+}
+
+
+/**
+ * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
+ * @hba:	pointer to adapter instance
+ *
+ * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
+ * 	and initialize table attributes
+ */
+static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
+{
+	int mem_size;
+	int i;
+
+	mem_size = hba->max_active_conns * sizeof(u32);
+	mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
+
+	hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
+	if (!hba->cid_que.cid_que_base)
+		return -ENOMEM;
+
+	mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
+	mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
+	hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
+	if (!hba->cid_que.conn_cid_tbl) {
+		kfree(hba->cid_que.cid_que_base);
+		hba->cid_que.cid_que_base = NULL;
+		return -ENOMEM;
+	}
+
+	hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
+	hba->cid_que.cid_q_prod_idx = 0;
+	hba->cid_que.cid_q_cons_idx = 0;
+	hba->cid_que.cid_q_max_idx = hba->max_active_conns;
+	hba->cid_que.cid_free_cnt = hba->max_active_conns;
+
+	for (i = 0; i < hba->max_active_conns; i++) {
+		hba->cid_que.cid_que[i] = i;
+		hba->cid_que.conn_cid_tbl[i] = NULL;
+	}
+	return 0;
+}
+
+
+/**
+ * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
+ * @hba:	pointer to adapter instance
+ */
+static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
+{
+	kfree(hba->cid_que.cid_que_base);
+	hba->cid_que.cid_que_base = NULL;
+
+	kfree(hba->cid_que.conn_cid_tbl);
+	hba->cid_que.conn_cid_tbl = NULL;
+}
+
+
+/**
+ * bnx2i_alloc_ep - allocates ep structure from global pool
+ * @hba:	pointer to adapter instance
+ *
+ * routine allocates a free endpoint structure from global pool and
+ *	a tcp port to be used for this connection.  Global resource lock,
+ *	'bnx2i_resc_lock' is held while accessing shared global data structures
+ */
+static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
+{
+	struct iscsi_endpoint *ep;
+	struct bnx2i_endpoint *bnx2i_ep;
+
+	ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
+	if (!ep) {
+		printk(KERN_ERR "bnx2i: Could not allocate ep\n");
+		return NULL;
+	}
+
+	bnx2i_ep = ep->dd_data;
+	INIT_LIST_HEAD(&bnx2i_ep->link);
+	bnx2i_ep->state = EP_STATE_IDLE;
+	bnx2i_ep->hba = hba;
+	bnx2i_ep->hba_age = hba->age;
+	hba->ofld_conns_active++;
+	init_waitqueue_head(&bnx2i_ep->ofld_wait);
+	return ep;
+}
+
+
+/**
+ * bnx2i_free_ep - free endpoint
+ * @ep:		pointer to iscsi endpoint structure
+ */
+static void bnx2i_free_ep(struct iscsi_endpoint *ep)
+{
+	struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&bnx2i_resc_lock, flags);
+	bnx2i_ep->state = EP_STATE_IDLE;
+	bnx2i_ep->hba->ofld_conns_active--;
+
+	bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
+	if (bnx2i_ep->conn) {
+		bnx2i_ep->conn->ep = NULL;
+		bnx2i_ep->conn = NULL;
+	}
+
+	bnx2i_ep->hba = NULL;
+	spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
+	iscsi_destroy_endpoint(ep);
+}
+
+
+/**
+ * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
+ * @hba:	adapter instance pointer
+ * @session:	iscsi session pointer
+ * @cmd:	iscsi command structure
+ */
+static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
+			   struct bnx2i_cmd *cmd)
+{
+	struct io_bdt *io = &cmd->io_tbl;
+	struct iscsi_bd *bd;
+
+	io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
+					ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
+					&io->bd_tbl_dma, GFP_KERNEL);
+	if (!io->bd_tbl) {
+		iscsi_session_printk(KERN_ERR, session, "Could not "
+				     "allocate bdt.\n");
+		return -ENOMEM;
+	}
+	io->bd_valid = 0;
+	return 0;
+}
+
+/**
+ * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
+ * @hba:	adapter instance pointer
+ * @session:	iscsi session pointer
+ * @cmd:	iscsi command structure
+ */
+static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
+				   struct iscsi_session *session)
+{
+	int i;
+
+	for (i = 0; i < session->cmds_max; i++) {
+		struct iscsi_task *task = session->cmds[i];
+		struct bnx2i_cmd *cmd = task->dd_data;
+
+		if (cmd->io_tbl.bd_tbl)
+			dma_free_coherent(&hba->pcidev->dev,
+					  ISCSI_MAX_BDS_PER_CMD *
+					  sizeof(struct iscsi_bd),
+					  cmd->io_tbl.bd_tbl,
+					  cmd->io_tbl.bd_tbl_dma);
+	}
+
+}
+
+
+/**
+ * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
+ * @hba:	adapter instance pointer
+ * @session:	iscsi session pointer
+ */
+static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
+				struct iscsi_session *session)
+{
+	int i;
+
+	for (i = 0; i < session->cmds_max; i++) {
+		struct iscsi_task *task = session->cmds[i];
+		struct bnx2i_cmd *cmd = task->dd_data;
+
+		/* Anil */
+		task->hdr = &cmd->hdr;
+		task->hdr_max = sizeof(struct iscsi_hdr);
+
+		if (bnx2i_alloc_bdt(hba, session, cmd))
+			goto free_bdts;
+	}
+
+	return 0;
+
+free_bdts:
+	bnx2i_destroy_cmd_pool(hba, session);
+	return -ENOMEM;
+}
+
+
+/**
+ * bnx2i_setup_mp_bdt - allocate BD table resources
+ * @hba:	pointer to adapter structure
+ *
+ * Allocate memory for dummy buffer and associated BD
+ * table to be used by middle path (MP) requests
+ */
+static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
+{
+	int rc = 0;
+	struct iscsi_bd *mp_bdt;
+	u64 addr;
+
+	hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
+					    &hba->mp_bd_dma, GFP_KERNEL);
+	if (!hba->mp_bd_tbl) {
+		printk(KERN_ERR "unable to allocate Middle Path BDT\n");
+		rc = -1;
+		goto out;
+	}
+
+	hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
+					       &hba->dummy_buf_dma, GFP_KERNEL);
+	if (!hba->dummy_buffer) {
+		printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
+		dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
+				  hba->mp_bd_tbl, hba->mp_bd_dma);
+		hba->mp_bd_tbl = NULL;
+		rc = -1;
+		goto out;
+	}
+
+	mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
+	addr = (unsigned long) hba->dummy_buf_dma;
+	mp_bdt->buffer_addr_lo = addr & 0xffffffff;
+	mp_bdt->buffer_addr_hi = addr >> 32;
+	mp_bdt->buffer_length = PAGE_SIZE;
+	mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
+			ISCSI_BD_FIRST_IN_BD_CHAIN;
+out:
+	return rc;
+}
+
+
+/**
+ * bnx2i_free_mp_bdt - releases ITT back to free pool
+ * @hba:	pointer to adapter instance
+ *
+ * free MP dummy buffer and associated BD table
+ */
+static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
+{
+	if (hba->mp_bd_tbl) {
+		dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
+				  hba->mp_bd_tbl, hba->mp_bd_dma);
+		hba->mp_bd_tbl = NULL;
+	}
+	if (hba->dummy_buffer) {
+		dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
+				  hba->dummy_buffer, hba->dummy_buf_dma);
+		hba->dummy_buffer = NULL;
+	}
+		return;
+}
+
+/**
+ * bnx2i_drop_session - notifies iscsid of connection error.
+ * @hba:	adapter instance pointer
+ * @session:	iscsi session pointer
+ *
+ * This notifies iscsid that there is a error, so it can initiate
+ * recovery.
+ *
+ * This relies on caller using the iscsi class iterator so the object
+ * is refcounted and does not disapper from under us.
+ */
+void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
+{
+	iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
+}
+
+/**
+ * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
+ * @hba:	pointer to adapter instance
+ * @ep:		pointer to endpoint (transport indentifier) structure
+ *
+ * EP destroy queue manager
+ */
+static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
+				     struct bnx2i_endpoint *ep)
+{
+	write_lock_bh(&hba->ep_rdwr_lock);
+	list_add_tail(&ep->link, &hba->ep_destroy_list);
+	write_unlock_bh(&hba->ep_rdwr_lock);
+	return 0;
+}
+
+/**
+ * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
+ *
+ * @hba: 		pointer to adapter instance
+ * @ep: 		pointer to endpoint (transport indentifier) structure
+ *
+ * EP destroy queue manager
+ */
+static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
+				     struct bnx2i_endpoint *ep)
+{
+	write_lock_bh(&hba->ep_rdwr_lock);
+	list_del_init(&ep->link);
+	write_unlock_bh(&hba->ep_rdwr_lock);
+
+	return 0;
+}
+
+/**
+ * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
+ * @hba:	pointer to adapter instance
+ * @ep:		pointer to endpoint (transport indentifier) structure
+ *
+ * pending conn offload completion queue manager
+ */
+static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
+				  struct bnx2i_endpoint *ep)
+{
+	write_lock_bh(&hba->ep_rdwr_lock);
+	list_add_tail(&ep->link, &hba->ep_ofld_list);
+	write_unlock_bh(&hba->ep_rdwr_lock);
+	return 0;
+}
+
+/**
+ * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
+ * @hba: 		pointer to adapter instance
+ * @ep: 		pointer to endpoint (transport indentifier) structure
+ *
+ * pending conn offload completion queue manager
+ */
+static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
+				  struct bnx2i_endpoint *ep)
+{
+	write_lock_bh(&hba->ep_rdwr_lock);
+	list_del_init(&ep->link);
+	write_unlock_bh(&hba->ep_rdwr_lock);
+	return 0;
+}
+
+
+/**
+ * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
+ *
+ * @hba: 		pointer to adapter instance
+ * @iscsi_cid:		iscsi context ID to find
+ *
+ */
+struct bnx2i_endpoint *
+bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
+{
+	struct list_head *list;
+	struct list_head *tmp;
+	struct bnx2i_endpoint *ep;
+
+	read_lock_bh(&hba->ep_rdwr_lock);
+	list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
+		ep = (struct bnx2i_endpoint *)list;
+
+		if (ep->ep_iscsi_cid == iscsi_cid)
+			break;
+		ep = NULL;
+	}
+	read_unlock_bh(&hba->ep_rdwr_lock);
+
+	if (!ep)
+		printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
+	return ep;
+}
+
+
+/**
+ * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
+ * @hba: 		pointer to adapter instance
+ * @iscsi_cid:		iscsi context ID to find
+ *
+ */
+struct bnx2i_endpoint *
+bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
+{
+	struct list_head *list;
+	struct list_head *tmp;
+	struct bnx2i_endpoint *ep;
+
+	read_lock_bh(&hba->ep_rdwr_lock);
+	list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
+		ep = (struct bnx2i_endpoint *)list;
+
+		if (ep->ep_iscsi_cid == iscsi_cid)
+			break;
+		ep = NULL;
+	}
+	read_unlock_bh(&hba->ep_rdwr_lock);
+
+	if (!ep)
+		printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
+
+	return ep;
+}
+
+/**
+ * bnx2i_setup_host_queue_size - assigns shost->can_queue param
+ * @hba:	pointer to adapter instance
+ * @shost:	scsi host pointer
+ *
+ * Initializes 'can_queue' parameter based on how many outstanding commands
+ * 	the device can handle. Each device 5708/5709/57710 has different
+ *	capabilities
+ */
+static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
+					struct Scsi_Host *shost)
+{
+	if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
+		shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
+	else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
+		shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
+	else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
+		shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
+	else
+		shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
+}
+
+
+/**
+ * bnx2i_alloc_hba - allocate and init adapter instance
+ * @cnic:	cnic device pointer
+ *
+ * allocate & initialize adapter structure and call other
+ *	support routines to do per adapter initialization
+ */
+struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
+{
+	struct Scsi_Host *shost;
+	struct bnx2i_hba *hba;
+
+	shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
+	if (!shost)
+		return NULL;
+	shost->dma_boundary = cnic->pcidev->dma_mask;
+	shost->transportt = bnx2i_scsi_xport_template;
+	shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
+	shost->max_channel = 0;
+	shost->max_lun = 512;
+	shost->max_cmd_len = 16;
+
+	hba = iscsi_host_priv(shost);
+	hba->shost = shost;
+	hba->netdev = cnic->netdev;
+	/* Get PCI related information and update hba struct members */
+	hba->pcidev = cnic->pcidev;
+	pci_dev_get(hba->pcidev);
+	hba->pci_did = hba->pcidev->device;
+	hba->pci_vid = hba->pcidev->vendor;
+	hba->pci_sdid = hba->pcidev->subsystem_device;
+	hba->pci_svid = hba->pcidev->subsystem_vendor;
+	hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
+	hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
+	bnx2i_identify_device(hba);
+
+	bnx2i_identify_device(hba);
+	bnx2i_setup_host_queue_size(hba, shost);
+
+	if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
+		hba->regview = ioremap_nocache(hba->netdev->base_addr,
+					       BNX2_MQ_CONFIG2);
+		if (!hba->regview)
+			goto ioreg_map_err;
+	} else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
+		hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096);
+		if (!hba->regview)
+			goto ioreg_map_err;
+	}
+
+	if (bnx2i_setup_mp_bdt(hba))
+		goto mp_bdt_mem_err;
+
+	INIT_LIST_HEAD(&hba->ep_ofld_list);
+	INIT_LIST_HEAD(&hba->ep_destroy_list);
+	rwlock_init(&hba->ep_rdwr_lock);
+
+	hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
+
+	/* different values for 5708/5709/57710 */
+	hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
+
+	if (bnx2i_setup_free_cid_que(hba))
+		goto cid_que_err;
+
+	/* SQ/RQ/CQ size can be changed via sysfx interface */
+	if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
+		if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
+			hba->max_sqes = sq_size;
+		else
+			hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
+	} else {	/* 5706/5708/5709 */
+		if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
+			hba->max_sqes = sq_size;
+		else
+			hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
+	}
+
+	hba->max_rqes = rq_size;
+	hba->max_cqes = hba->max_sqes + rq_size;
+	if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
+		if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
+			hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
+	} else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
+		hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
+
+	hba->num_ccell = hba->max_sqes / 2;
+
+	spin_lock_init(&hba->lock);
+	mutex_init(&hba->net_dev_lock);
+
+	if (iscsi_host_add(shost, &hba->pcidev->dev))
+		goto free_dump_mem;
+	return hba;
+
+free_dump_mem:
+	bnx2i_release_free_cid_que(hba);
+cid_que_err:
+	bnx2i_free_mp_bdt(hba);
+mp_bdt_mem_err:
+	if (hba->regview) {
+		iounmap(hba->regview);
+		hba->regview = NULL;
+	}
+ioreg_map_err:
+	pci_dev_put(hba->pcidev);
+	scsi_host_put(shost);
+	return NULL;
+}
+
+/**
+ * bnx2i_free_hba- releases hba structure and resources held by the adapter
+ * @hba:	pointer to adapter instance
+ *
+ * free adapter structure and call various cleanup routines.
+ */
+void bnx2i_free_hba(struct bnx2i_hba *hba)
+{
+	struct Scsi_Host *shost = hba->shost;
+
+	iscsi_host_remove(shost);
+	INIT_LIST_HEAD(&hba->ep_ofld_list);
+	INIT_LIST_HEAD(&hba->ep_destroy_list);
+	pci_dev_put(hba->pcidev);
+
+	if (hba->regview) {
+		iounmap(hba->regview);
+		hba->regview = NULL;
+	}
+	bnx2i_free_mp_bdt(hba);
+	bnx2i_release_free_cid_que(hba);
+	iscsi_host_free(shost);
+}
+
+/**
+ * bnx2i_conn_free_login_resources - free DMA resources used for login process
+ * @hba:		pointer to adapter instance
+ * @bnx2i_conn:		iscsi connection pointer
+ *
+ * Login related resources, mostly BDT & payload DMA memory is freed
+ */
+static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
+					    struct bnx2i_conn *bnx2i_conn)
+{
+	if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
+		dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
+				  bnx2i_conn->gen_pdu.resp_bd_tbl,
+				  bnx2i_conn->gen_pdu.resp_bd_dma);
+		bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
+	}
+
+	if (bnx2i_conn->gen_pdu.req_bd_tbl) {
+		dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
+				  bnx2i_conn->gen_pdu.req_bd_tbl,
+				  bnx2i_conn->gen_pdu.req_bd_dma);
+		bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
+	}
+
+	if (bnx2i_conn->gen_pdu.resp_buf) {
+		dma_free_coherent(&hba->pcidev->dev,
+				  ISCSI_DEF_MAX_RECV_SEG_LEN,
+				  bnx2i_conn->gen_pdu.resp_buf,
+				  bnx2i_conn->gen_pdu.resp_dma_addr);
+		bnx2i_conn->gen_pdu.resp_buf = NULL;
+	}
+
+	if (bnx2i_conn->gen_pdu.req_buf) {
+		dma_free_coherent(&hba->pcidev->dev,
+				  ISCSI_DEF_MAX_RECV_SEG_LEN,
+				  bnx2i_conn->gen_pdu.req_buf,
+				  bnx2i_conn->gen_pdu.req_dma_addr);
+		bnx2i_conn->gen_pdu.req_buf = NULL;
+	}
+}
+
+/**
+ * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
+ * @hba:		pointer to adapter instance
+ * @bnx2i_conn:		iscsi connection pointer
+ *
+ * Mgmt task DNA resources are allocated in this routine.
+ */
+static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
+					    struct bnx2i_conn *bnx2i_conn)
+{
+	/* Allocate memory for login request/response buffers */
+	bnx2i_conn->gen_pdu.req_buf =
+		dma_alloc_coherent(&hba->pcidev->dev,
+				   ISCSI_DEF_MAX_RECV_SEG_LEN,
+				   &bnx2i_conn->gen_pdu.req_dma_addr,
+				   GFP_KERNEL);
+	if (bnx2i_conn->gen_pdu.req_buf == NULL)
+		goto login_req_buf_failure;
+
+	bnx2i_conn->gen_pdu.req_buf_size = 0;
+	bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
+
+	bnx2i_conn->gen_pdu.resp_buf =
+		dma_alloc_coherent(&hba->pcidev->dev,
+				   ISCSI_DEF_MAX_RECV_SEG_LEN,
+				   &bnx2i_conn->gen_pdu.resp_dma_addr,
+				   GFP_KERNEL);
+	if (bnx2i_conn->gen_pdu.resp_buf == NULL)
+		goto login_resp_buf_failure;
+
+	bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
+	bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
+
+	bnx2i_conn->gen_pdu.req_bd_tbl =
+		dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
+				   &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
+	if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
+		goto login_req_bd_tbl_failure;
+
+	bnx2i_conn->gen_pdu.resp_bd_tbl =
+		dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
+				   &bnx2i_conn->gen_pdu.resp_bd_dma,
+				   GFP_KERNEL);
+	if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
+		goto login_resp_bd_tbl_failure;
+
+	return 0;
+
+login_resp_bd_tbl_failure:
+	dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
+			  bnx2i_conn->gen_pdu.req_bd_tbl,
+			  bnx2i_conn->gen_pdu.req_bd_dma);
+	bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
+
+login_req_bd_tbl_failure:
+	dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
+			  bnx2i_conn->gen_pdu.resp_buf,
+			  bnx2i_conn->gen_pdu.resp_dma_addr);
+	bnx2i_conn->gen_pdu.resp_buf = NULL;
+login_resp_buf_failure:
+	dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
+			  bnx2i_conn->gen_pdu.req_buf,
+			  bnx2i_conn->gen_pdu.req_dma_addr);
+	bnx2i_conn->gen_pdu.req_buf = NULL;
+login_req_buf_failure:
+	iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
+			  "login resource alloc failed!!\n");
+	return -ENOMEM;
+
+}
+
+
+/**
+ * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
+ * @bnx2i_conn:		iscsi connection pointer
+ *
+ * Allocates buffers and BD tables before shipping requests to cnic
+ *	for PDUs prepared by 'iscsid' daemon
+ */
+static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
+{
+	struct iscsi_bd *bd_tbl;
+
+	bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
+
+	bd_tbl->buffer_addr_hi =
+		(u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
+	bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
+	bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
+				bnx2i_conn->gen_pdu.req_buf;
+	bd_tbl->reserved0 = 0;
+	bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
+			ISCSI_BD_FIRST_IN_BD_CHAIN;
+
+	bd_tbl = (struct iscsi_bd  *) bnx2i_conn->gen_pdu.resp_bd_tbl;
+	bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
+	bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
+	bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
+	bd_tbl->reserved0 = 0;
+	bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
+			ISCSI_BD_FIRST_IN_BD_CHAIN;
+}
+
+
+/**
+ * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
+ * @task:	transport layer task pointer
+ *
+ * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
+ *	Nop-out and Logout requests flow through this path.
+ */
+static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
+{
+	struct bnx2i_cmd *cmd = task->dd_data;
+	struct bnx2i_conn *bnx2i_conn = cmd->conn;
+	int rc = 0;
+	char *buf;
+	int data_len;
+
+	bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
+	switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
+	case ISCSI_OP_LOGIN:
+		bnx2i_send_iscsi_login(bnx2i_conn, task);
+		break;
+	case ISCSI_OP_NOOP_OUT:
+		data_len = bnx2i_conn->gen_pdu.req_buf_size;
+		buf = bnx2i_conn->gen_pdu.req_buf;
+		if (data_len)
+			rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
+						     RESERVED_ITT,
+						     buf, data_len, 1);
+		else
+			rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
+						     RESERVED_ITT,
+						     NULL, 0, 1);
+		break;
+	case ISCSI_OP_LOGOUT:
+		rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
+		break;
+	case ISCSI_OP_SCSI_TMFUNC:
+		rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
+		break;
+	default:
+		iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
+				  "send_gen: unsupported op 0x%x\n",
+				  task->hdr->opcode);
+	}
+	return rc;
+}
+
+
+/**********************************************************************
+ *		SCSI-ML Interface
+ **********************************************************************/
+
+/**
+ * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
+ * @sc:		SCSI-ML command pointer
+ * @cmd:	iscsi cmd pointer
+ */
+static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
+{
+	u32 dword;
+	int lpcnt;
+	u8 *srcp;
+	u32 *dstp;
+	u32 scsi_lun[2];
+
+	int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
+	cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
+	cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
+
+	lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
+	srcp = (u8 *) sc->cmnd;
+	dstp = (u32 *) cmd->req.cdb;
+	while (lpcnt--) {
+		memcpy(&dword, (const void *) srcp, 4);
+		*dstp = cpu_to_be32(dword);
+		srcp += 4;
+		dstp++;
+	}
+	if (sc->cmd_len & 0x3) {
+		dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
+		*dstp = cpu_to_be32(dword);
+	}
+}
+
+static void bnx2i_cleanup_task(struct iscsi_task *task)
+{
+	struct iscsi_conn *conn = task->conn;
+	struct bnx2i_conn *bnx2i_conn = conn->dd_data;
+	struct bnx2i_hba *hba = bnx2i_conn->hba;
+
+	/*
+	 * mgmt task or cmd was never sent to us to transmit.
+	 */
+	if (!task->sc || task->state == ISCSI_TASK_PENDING)
+		return;
+	/*
+	 * need to clean-up task context to claim dma buffers
+	 */
+	if (task->state == ISCSI_TASK_ABRT_TMF) {
+		bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
+
+		spin_unlock_bh(&conn->session->lock);
+		wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
+				msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
+		spin_lock_bh(&conn->session->lock);
+	}
+	bnx2i_iscsi_unmap_sg_list(task->dd_data);
+}
+
+/**
+ * bnx2i_mtask_xmit - transmit mtask to chip for further processing
+ * @conn:	transport layer conn structure pointer
+ * @task:	transport layer command structure pointer
+ */
+static int
+bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
+{
+	struct bnx2i_conn *bnx2i_conn = conn->dd_data;
+	struct bnx2i_cmd *cmd = task->dd_data;
+
+	memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
+
+	bnx2i_setup_cmd_wqe_template(cmd);
+	bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
+	if (task->data_count) {
+		memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
+		       task->data_count);
+		bnx2i_conn->gen_pdu.req_wr_ptr =
+			bnx2i_conn->gen_pdu.req_buf + task->data_count;
+	}
+	cmd->conn = conn->dd_data;
+	cmd->scsi_cmd = NULL;
+	return bnx2i_iscsi_send_generic_request(task);
+}
+
+/**
+ * bnx2i_task_xmit - transmit iscsi command to chip for further processing
+ * @task:	transport layer command structure pointer
+ *
+ * maps SG buffers and send request to chip/firmware in the form of SQ WQE
+ */
+static int bnx2i_task_xmit(struct iscsi_task *task)
+{
+	struct iscsi_conn *conn = task->conn;
+	struct iscsi_session *session = conn->session;
+	struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
+	struct bnx2i_hba *hba = iscsi_host_priv(shost);
+	struct bnx2i_conn *bnx2i_conn = conn->dd_data;
+	struct scsi_cmnd *sc = task->sc;
+	struct bnx2i_cmd *cmd = task->dd_data;
+	struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
+
+	if (test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
+		return -ENOTCONN;
+
+	if (!bnx2i_conn->is_bound)
+		return -ENOTCONN;
+
+	/*
+	 * If there is no scsi_cmnd this must be a mgmt task
+	 */
+	if (!sc)
+		return bnx2i_mtask_xmit(conn, task);
+
+	bnx2i_setup_cmd_wqe_template(cmd);
+	cmd->req.op_code = ISCSI_OP_SCSI_CMD;
+	cmd->conn = bnx2i_conn;
+	cmd->scsi_cmd = sc;
+	cmd->req.total_data_transfer_length = scsi_bufflen(sc);
+	cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
+
+	bnx2i_iscsi_map_sg_list(cmd);
+	bnx2i_cpy_scsi_cdb(sc, cmd);
+
+	cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
+	if (sc->sc_data_direction == DMA_TO_DEVICE) {
+		cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
+		cmd->req.itt = task->itt |
+			(ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
+		bnx2i_setup_write_cmd_bd_info(task);
+	} else {
+		if (scsi_bufflen(sc))
+			cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
+		cmd->req.itt = task->itt |
+			(ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
+	}
+
+	cmd->req.num_bds = cmd->io_tbl.bd_valid;
+	if (!cmd->io_tbl.bd_valid) {
+		cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
+		cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
+		cmd->req.num_bds = 1;
+	}
+
+	bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
+	return 0;
+}
+
+/**
+ * bnx2i_session_create - create a new iscsi session
+ * @cmds_max:		max commands supported
+ * @qdepth:		scsi queue depth to support
+ * @initial_cmdsn:	initial iscsi CMDSN to be used for this session
+ *
+ * Creates a new iSCSI session instance on given device.
+ */
+static struct iscsi_cls_session *
+bnx2i_session_create(struct iscsi_endpoint *ep,
+		     uint16_t cmds_max, uint16_t qdepth,
+		     uint32_t initial_cmdsn)
+{
+	struct Scsi_Host *shost;
+	struct iscsi_cls_session *cls_session;
+	struct bnx2i_hba *hba;
+	struct bnx2i_endpoint *bnx2i_ep;
+
+	if (!ep) {
+		printk(KERN_ERR "bnx2i: missing ep.\n");
+		return NULL;
+	}
+
+	bnx2i_ep = ep->dd_data;
+	shost = bnx2i_ep->hba->shost;
+	hba = iscsi_host_priv(shost);
+	if (bnx2i_adapter_ready(hba))
+		return NULL;
+
+	/*
+	 * user can override hw limit as long as it is within
+	 * the min/max.
+	 */
+	if (cmds_max > hba->max_sqes)
+		cmds_max = hba->max_sqes;
+	else if (cmds_max < BNX2I_SQ_WQES_MIN)
+		cmds_max = BNX2I_SQ_WQES_MIN;
+
+	cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
+					  cmds_max, sizeof(struct bnx2i_cmd),
+					  initial_cmdsn, ISCSI_MAX_TARGET);
+	if (!cls_session)
+		return NULL;
+
+	if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
+		goto session_teardown;
+	return cls_session;
+
+session_teardown:
+	iscsi_session_teardown(cls_session);
+	return NULL;
+}
+
+
+/**
+ * bnx2i_session_destroy - destroys iscsi session
+ * @cls_session:	pointer to iscsi cls session
+ *
+ * Destroys previously created iSCSI session instance and releases
+ *	all resources held by it
+ */
+static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
+{
+	struct iscsi_session *session = cls_session->dd_data;
+	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+	struct bnx2i_hba *hba = iscsi_host_priv(shost);
+
+	bnx2i_destroy_cmd_pool(hba, session);
+	iscsi_session_teardown(cls_session);
+}
+
+
+/**
+ * bnx2i_conn_create - create iscsi connection instance
+ * @cls_session:	pointer to iscsi cls session
+ * @cid:		iscsi cid as per rfc (not NX2's CID terminology)
+ *
+ * Creates a new iSCSI connection instance for a given session
+ */
+static struct iscsi_cls_conn *
+bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
+{
+	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+	struct bnx2i_hba *hba = iscsi_host_priv(shost);
+	struct bnx2i_conn *bnx2i_conn;
+	struct iscsi_cls_conn *cls_conn;
+	struct iscsi_conn *conn;
+
+	cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
+				    cid);
+	if (!cls_conn)
+		return NULL;
+	conn = cls_conn->dd_data;
+
+	bnx2i_conn = conn->dd_data;
+	bnx2i_conn->cls_conn = cls_conn;
+	bnx2i_conn->hba = hba;
+	/* 'ep' ptr will be assigned in bind() call */
+	bnx2i_conn->ep = NULL;
+	init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
+
+	if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
+		iscsi_conn_printk(KERN_ALERT, conn,
+				  "conn_new: login resc alloc failed!!\n");
+		goto free_conn;
+	}
+
+	return cls_conn;
+
+free_conn:
+	iscsi_conn_teardown(cls_conn);
+	return NULL;
+}
+
+/**
+ * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
+ * @cls_session:	pointer to iscsi cls session
+ * @cls_conn:		pointer to iscsi cls conn
+ * @transport_fd:	64-bit EP handle
+ * @is_leading:		leading connection on this session?
+ *
+ * Binds together iSCSI session instance, iSCSI connection instance
+ *	and the TCP connection. This routine returns error code if
+ *	TCP connection does not belong on the device iSCSI sess/conn
+ *	is bound
+ */
+static int bnx2i_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 = cls_conn->dd_data;
+	struct bnx2i_conn *bnx2i_conn = conn->dd_data;
+	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+	struct bnx2i_hba *hba = iscsi_host_priv(shost);
+	struct bnx2i_endpoint *bnx2i_ep;
+	struct iscsi_endpoint *ep;
+	int ret_code;
+
+	ep = iscsi_lookup_endpoint(transport_fd);
+	if (!ep)
+		return -EINVAL;
+
+	bnx2i_ep = ep->dd_data;
+	if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
+	    (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
+		/* Peer disconnect via' FIN or RST */
+		return -EINVAL;
+
+	if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
+		return -EINVAL;
+
+	if (bnx2i_ep->hba != hba) {
+		/* Error - TCP connection does not belong to this device
+		 */
+		iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
+				  "conn bind, ep=0x%p (%s) does not",
+				  bnx2i_ep, bnx2i_ep->hba->netdev->name);
+		iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
+				  "belong to hba (%s)\n",
+				  hba->netdev->name);
+		return -EEXIST;
+	}
+
+	bnx2i_ep->conn = bnx2i_conn;
+	bnx2i_conn->ep = bnx2i_ep;
+	bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
+	bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
+	bnx2i_conn->is_bound = 1;
+
+	ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
+						bnx2i_ep->ep_iscsi_cid);
+
+	/* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
+	 * driver needs to explicitly replenish RQ index during setup.
+	 */
+	if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
+		bnx2i_put_rq_buf(bnx2i_conn, 0);
+
+	bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
+	return ret_code;
+}
+
+
+/**
+ * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
+ * @cls_conn:	pointer to iscsi cls conn
+ *
+ * Destroy an iSCSI connection instance and release memory resources held by
+ *	this connection
+ */
+static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
+{
+	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct bnx2i_conn *bnx2i_conn = conn->dd_data;
+	struct Scsi_Host *shost;
+	struct bnx2i_hba *hba;
+
+	shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
+	hba = iscsi_host_priv(shost);
+
+	bnx2i_conn_free_login_resources(hba, bnx2i_conn);
+	iscsi_conn_teardown(cls_conn);
+}
+
+
+/**
+ * bnx2i_conn_get_param - return iscsi connection parameter to caller
+ * @cls_conn:	pointer to iscsi cls conn
+ * @param:	parameter type identifier
+ * @buf: 	buffer pointer
+ *
+ * returns iSCSI connection parameters
+ */
+static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn,
+				enum iscsi_param param, char *buf)
+{
+	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct bnx2i_conn *bnx2i_conn = conn->dd_data;
+	int len = 0;
+
+	switch (param) {
+	case ISCSI_PARAM_CONN_PORT:
+		if (bnx2i_conn->ep)
+			len = sprintf(buf, "%hu\n",
+				      bnx2i_conn->ep->cm_sk->dst_port);
+		break;
+	case ISCSI_PARAM_CONN_ADDRESS:
+		if (bnx2i_conn->ep)
+			len = sprintf(buf, NIPQUAD_FMT "\n",
+				      NIPQUAD(bnx2i_conn->ep->cm_sk->dst_ip));
+		break;
+	default:
+		return iscsi_conn_get_param(cls_conn, param, buf);
+	}
+
+	return len;
+}
+
+/**
+ * bnx2i_host_get_param - returns host (adapter) related parameters
+ * @shost:	scsi host pointer
+ * @param:	parameter type identifier
+ * @buf:	buffer pointer
+ */
+static int bnx2i_host_get_param(struct Scsi_Host *shost,
+				enum iscsi_host_param param, char *buf)
+{
+	struct bnx2i_hba *hba = iscsi_host_priv(shost);
+	int len = 0;
+
+	switch (param) {
+	case ISCSI_HOST_PARAM_HWADDRESS:
+		len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
+		break;
+	case ISCSI_HOST_PARAM_NETDEV_NAME:
+		len = sprintf(buf, "%s\n", hba->netdev->name);
+		break;
+	default:
+		return iscsi_host_get_param(shost, param, buf);
+	}
+	return len;
+}
+
+/**
+ * bnx2i_conn_start - completes iscsi connection migration to FFP
+ * @cls_conn:	pointer to iscsi cls conn
+ *
+ * last call in FFP migration to handover iscsi conn to the driver
+ */
+static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
+{
+	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct bnx2i_conn *bnx2i_conn = conn->dd_data;
+
+	bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
+	bnx2i_update_iscsi_conn(conn);
+
+	/*
+	 * this should normally not sleep for a long time so it should
+	 * not disrupt the caller.
+	 */
+	bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
+	bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
+	bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
+	add_timer(&bnx2i_conn->ep->ofld_timer);
+	/* update iSCSI context for this conn, wait for CNIC to complete */
+	wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
+			bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
+
+	if (signal_pending(current))
+		flush_signals(current);
+	del_timer_sync(&bnx2i_conn->ep->ofld_timer);
+
+	iscsi_conn_start(cls_conn);
+	return 0;
+}
+
+
+/**
+ * bnx2i_conn_get_stats - returns iSCSI stats
+ * @cls_conn:	pointer to iscsi cls conn
+ * @stats:	pointer to iscsi statistic struct
+ */
+static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
+				 struct iscsi_stats *stats)
+{
+	struct iscsi_conn *conn = cls_conn->dd_data;
+
+	stats->txdata_octets = conn->txdata_octets;
+	stats->rxdata_octets = conn->rxdata_octets;
+	stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
+	stats->dataout_pdus = conn->dataout_pdus_cnt;
+	stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
+	stats->datain_pdus = conn->datain_pdus_cnt;
+	stats->r2t_pdus = conn->r2t_pdus_cnt;
+	stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
+	stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
+	stats->custom_length = 3;
+	strcpy(stats->custom[2].desc, "eh_abort_cnt");
+	stats->custom[2].value = conn->eh_abort_cnt;
+	stats->digest_err = 0;
+	stats->timeout_err = 0;
+	stats->custom_length = 0;
+}
+
+
+/**
+ * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
+ * @dst_addr:	target IP address
+ *
+ * check if route resolves to BNX2 device
+ */
+static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
+{
+	struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
+	struct bnx2i_hba *hba;
+	struct cnic_dev *cnic = NULL;
+
+	bnx2i_reg_dev_all();
+
+	hba = get_adapter_list_head();
+	if (hba && hba->cnic)
+		cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
+	if (!cnic) {
+		printk(KERN_ALERT "bnx2i: no route,"
+		       "can't connect using cnic\n");
+		goto no_nx2_route;
+	}
+	hba = bnx2i_find_hba_for_cnic(cnic);
+	if (!hba)
+		goto no_nx2_route;
+
+	if (bnx2i_adapter_ready(hba)) {
+		printk(KERN_ALERT "bnx2i: check route, hba not found\n");
+		goto no_nx2_route;
+	}
+	if (hba->netdev->mtu > hba->mtu_supported) {
+		printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
+				  hba->netdev->name, hba->netdev->mtu);
+		printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
+				  hba->mtu_supported);
+		goto no_nx2_route;
+	}
+	return hba;
+no_nx2_route:
+	return NULL;
+}
+
+
+/**
+ * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
+ * @hba:	pointer to adapter instance
+ * @ep:		endpoint (transport indentifier) structure
+ *
+ * destroys cm_sock structure and on chip iscsi context
+ */
+static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
+				 struct bnx2i_endpoint *ep)
+{
+	if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
+		hba->cnic->cm_destroy(ep->cm_sk);
+
+	if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
+		ep->state = EP_STATE_DISCONN_COMPL;
+
+	if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
+	    ep->state == EP_STATE_DISCONN_TIMEDOUT) {
+		printk(KERN_ALERT "bnx2i - ERROR - please submit GRC Dump,"
+				  " NW/PCIe trace, driver msgs to developers"
+				  " for analysis\n");
+		return 1;
+	}
+
+	ep->state = EP_STATE_CLEANUP_START;
+	init_timer(&ep->ofld_timer);
+	ep->ofld_timer.expires = 10*HZ + jiffies;
+	ep->ofld_timer.function = bnx2i_ep_ofld_timer;
+	ep->ofld_timer.data = (unsigned long) ep;
+	add_timer(&ep->ofld_timer);
+
+	bnx2i_ep_destroy_list_add(hba, ep);
+
+	/* destroy iSCSI context, wait for it to complete */
+	bnx2i_send_conn_destroy(hba, ep);
+	wait_event_interruptible(ep->ofld_wait,
+				 (ep->state != EP_STATE_CLEANUP_START));
+
+	if (signal_pending(current))
+		flush_signals(current);
+	del_timer_sync(&ep->ofld_timer);
+
+	bnx2i_ep_destroy_list_del(hba, ep);
+
+	if (ep->state != EP_STATE_CLEANUP_CMPL)
+		/* should never happen */
+		printk(KERN_ALERT "bnx2i - conn destroy failed\n");
+
+	return 0;
+}
+
+
+/**
+ * bnx2i_ep_connect - establish TCP connection to target portal
+ * @shost:		scsi host
+ * @dst_addr:		target IP address
+ * @non_blocking:	blocking or non-blocking call
+ *
+ * this routine initiates the TCP/IP connection by invoking Option-2 i/f
+ *	with l5_core and the CNIC. This is a multi-step process of resolving
+ *	route to target, create a iscsi connection context, handshaking with
+ *	CNIC module to create/initialize the socket struct and finally
+ *	sending down option-2 request to complete TCP 3-way handshake
+ */
+static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
+					       struct sockaddr *dst_addr,
+					       int non_blocking)
+{
+	u32 iscsi_cid = BNX2I_CID_RESERVED;
+	struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
+	struct sockaddr_in6 *desti6;
+	struct bnx2i_endpoint *bnx2i_ep;
+	struct bnx2i_hba *hba;
+	struct cnic_dev *cnic;
+	struct cnic_sockaddr saddr;
+	struct iscsi_endpoint *ep;
+	int rc = 0;
+
+	if (shost)
+		/* driver is given scsi host to work with */
+		hba = iscsi_host_priv(shost);
+	else
+		/*
+		 * check if the given destination can be reached through
+		 * a iscsi capable NetXtreme2 device
+		 */
+		hba = bnx2i_check_route(dst_addr);
+	if (!hba) {
+		rc = -ENOMEM;
+		goto check_busy;
+	}
+
+	cnic = hba->cnic;
+	ep = bnx2i_alloc_ep(hba);
+	if (!ep) {
+		rc = -ENOMEM;
+		goto check_busy;
+	}
+	bnx2i_ep = ep->dd_data;
+
+	mutex_lock(&hba->net_dev_lock);
+	if (bnx2i_adapter_ready(hba)) {
+		rc = -EPERM;
+		goto net_if_down;
+	}
+
+	bnx2i_ep->state = EP_STATE_IDLE;
+	bnx2i_ep->ep_iscsi_cid = (u16) -1;
+	bnx2i_ep->num_active_cmds = 0;
+	iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
+	if (iscsi_cid == -1) {
+		printk(KERN_ALERT "alloc_ep: unable to allocate iscsi cid\n");
+		rc = -ENOMEM;
+		goto iscsi_cid_err;
+	}
+	bnx2i_ep->hba_age = hba->age;
+
+	rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
+	if (rc != 0) {
+		printk(KERN_ALERT "bnx2i: ep_conn, alloc QP resc error\n");
+		rc = -ENOMEM;
+		goto qp_resc_err;
+	}
+
+	bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
+	bnx2i_ep->state = EP_STATE_OFLD_START;
+	bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
+
+	init_timer(&bnx2i_ep->ofld_timer);
+	bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
+	bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
+	bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
+	add_timer(&bnx2i_ep->ofld_timer);
+
+	bnx2i_send_conn_ofld_req(hba, bnx2i_ep);
+
+	/* Wait for CNIC hardware to setup conn context and return 'cid' */
+	wait_event_interruptible(bnx2i_ep->ofld_wait,
+				 bnx2i_ep->state != EP_STATE_OFLD_START);
+
+	if (signal_pending(current))
+		flush_signals(current);
+	del_timer_sync(&bnx2i_ep->ofld_timer);
+
+	bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
+
+	if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
+		rc = -ENOSPC;
+		goto conn_failed;
+	}
+
+	rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
+			     iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
+	if (rc) {
+		rc = -EINVAL;
+		goto conn_failed;
+	}
+
+	bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
+	bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
+	clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
+
+	memset(&saddr, 0, sizeof(saddr));
+	if (dst_addr->sa_family == AF_INET) {
+		desti = (struct sockaddr_in *) dst_addr;
+		saddr.remote.v4 = *desti;
+		saddr.local.v4.sin_family = desti->sin_family;
+	} else if (dst_addr->sa_family == AF_INET6) {
+		desti6 = (struct sockaddr_in6 *) dst_addr;
+		saddr.remote.v6 = *desti6;
+		saddr.local.v6.sin6_family = desti6->sin6_family;
+	}
+
+	bnx2i_ep->timestamp = jiffies;
+	bnx2i_ep->state = EP_STATE_CONNECT_START;
+	if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
+		rc = -EINVAL;
+		goto conn_failed;
+	} else
+		rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
+
+	if (rc)
+		goto release_ep;
+
+	if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
+		goto release_ep;
+	mutex_unlock(&hba->net_dev_lock);
+	return ep;
+
+release_ep:
+	if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
+		mutex_unlock(&hba->net_dev_lock);
+		return ERR_PTR(rc);
+	}
+conn_failed:
+net_if_down:
+iscsi_cid_err:
+	bnx2i_free_qp_resc(hba, bnx2i_ep);
+qp_resc_err:
+	bnx2i_free_ep(ep);
+	mutex_unlock(&hba->net_dev_lock);
+check_busy:
+	bnx2i_unreg_dev_all();
+	return ERR_PTR(rc);
+}
+
+
+/**
+ * bnx2i_ep_poll - polls for TCP connection establishement
+ * @ep:			TCP connection (endpoint) handle
+ * @timeout_ms:		timeout value in milli secs
+ *
+ * polls for TCP connect request to complete
+ */
+static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
+{
+	struct bnx2i_endpoint *bnx2i_ep;
+	int rc = 0;
+
+	bnx2i_ep = ep->dd_data;
+	if ((bnx2i_ep->state == EP_STATE_IDLE) ||
+	    (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
+	    (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
+		return -1;
+	if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
+		return 1;
+
+	rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
+					      ((bnx2i_ep->state ==
+						EP_STATE_OFLD_FAILED) ||
+					       (bnx2i_ep->state ==
+						EP_STATE_CONNECT_FAILED) ||
+					       (bnx2i_ep->state ==
+						EP_STATE_CONNECT_COMPL)),
+					      msecs_to_jiffies(timeout_ms));
+	if (!rc || (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
+		rc = -1;
+
+	if (rc > 0)
+		return 1;
+	else if (!rc)
+		return 0;	/* timeout */
+	else
+		return rc;
+}
+
+
+/**
+ * bnx2i_ep_tcp_conn_active - check EP state transition
+ * @ep:		endpoint pointer
+ *
+ * check if underlying TCP connection is active
+ */
+static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
+{
+	int ret;
+	int cnic_dev_10g = 0;
+
+	if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
+		cnic_dev_10g = 1;
+
+	switch (bnx2i_ep->state) {
+	case EP_STATE_CONNECT_START:
+	case EP_STATE_CLEANUP_FAILED:
+	case EP_STATE_OFLD_FAILED:
+	case EP_STATE_DISCONN_TIMEDOUT:
+		ret = 0;
+		break;
+	case EP_STATE_CONNECT_COMPL:
+	case EP_STATE_ULP_UPDATE_START:
+	case EP_STATE_ULP_UPDATE_COMPL:
+	case EP_STATE_TCP_FIN_RCVD:
+	case EP_STATE_ULP_UPDATE_FAILED:
+		ret = 1;
+		break;
+	case EP_STATE_TCP_RST_RCVD:
+		ret = 0;
+		break;
+	case EP_STATE_CONNECT_FAILED:
+		if (cnic_dev_10g)
+			ret = 1;
+		else
+			ret = 0;
+		break;
+	default:
+		ret = 0;
+	}
+
+	return ret;
+}
+
+
+/**
+ * bnx2i_ep_disconnect - executes TCP connection teardown process
+ * @ep:		TCP connection (endpoint) handle
+ *
+ * executes  TCP connection teardown process
+ */
+static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
+{
+	struct bnx2i_endpoint *bnx2i_ep;
+	struct bnx2i_conn *bnx2i_conn = NULL;
+	struct iscsi_session *session = NULL;
+	struct iscsi_conn *conn;
+	struct cnic_dev *cnic;
+	struct bnx2i_hba *hba;
+
+	bnx2i_ep = ep->dd_data;
+
+	/* driver should not attempt connection cleanup untill TCP_CONNECT
+	 * completes either successfully or fails. Timeout is 9-secs, so
+	 * wait for it to complete
+	 */
+	while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
+		!time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
+		msleep(250);
+
+	if (bnx2i_ep->conn) {
+		bnx2i_conn = bnx2i_ep->conn;
+		conn = bnx2i_conn->cls_conn->dd_data;
+		session = conn->session;
+
+		spin_lock_bh(&session->lock);
+		bnx2i_conn->is_bound = 0;
+		spin_unlock_bh(&session->lock);
+	}
+
+	hba = bnx2i_ep->hba;
+	if (bnx2i_ep->state == EP_STATE_IDLE)
+		goto return_bnx2i_ep;
+	cnic = hba->cnic;
+
+	mutex_lock(&hba->net_dev_lock);
+
+	if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
+		goto free_resc;
+	if (bnx2i_ep->hba_age != hba->age)
+		goto free_resc;
+
+	if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
+		goto destory_conn;
+
+	bnx2i_ep->state = EP_STATE_DISCONN_START;
+
+	init_timer(&bnx2i_ep->ofld_timer);
+	bnx2i_ep->ofld_timer.expires = 10*HZ + jiffies;
+	bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
+	bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
+	add_timer(&bnx2i_ep->ofld_timer);
+
+	if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
+		int close = 0;
+
+		if (session) {
+			spin_lock_bh(&session->lock);
+			if (session->state == ISCSI_STATE_LOGGING_OUT)
+				close = 1;
+			spin_unlock_bh(&session->lock);
+		}
+		if (close)
+			cnic->cm_close(bnx2i_ep->cm_sk);
+		else
+			cnic->cm_abort(bnx2i_ep->cm_sk);
+	} else
+		goto free_resc;
+
+	/* wait for option-2 conn teardown */
+	wait_event_interruptible(bnx2i_ep->ofld_wait,
+				 bnx2i_ep->state != EP_STATE_DISCONN_START);
+
+	if (signal_pending(current))
+		flush_signals(current);
+	del_timer_sync(&bnx2i_ep->ofld_timer);
+
+destory_conn:
+	if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
+		mutex_unlock(&hba->net_dev_lock);
+		return;
+	}
+free_resc:
+	mutex_unlock(&hba->net_dev_lock);
+	bnx2i_free_qp_resc(hba, bnx2i_ep);
+return_bnx2i_ep:
+	if (bnx2i_conn)
+		bnx2i_conn->ep = NULL;
+
+	bnx2i_free_ep(ep);
+
+	if (!hba->ofld_conns_active)
+		bnx2i_unreg_dev_all();
+}
+
+
+/**
+ * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
+ * @buf:	pointer to buffer containing iscsi path message
+ *
+ */
+static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
+{
+	struct bnx2i_hba *hba = iscsi_host_priv(shost);
+	char *buf = (char *) params;
+	u16 len = sizeof(*params);
+
+	/* handled by cnic driver */
+	hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
+				     len);
+
+	return 0;
+}
+
+
+/*
+ * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
+ * used while registering with the scsi host and iSCSI transport module.
+ */
+static struct scsi_host_template bnx2i_host_template = {
+	.module			= THIS_MODULE,
+	.name			= "Broadcom Offload iSCSI Initiator",
+	.proc_name		= "bnx2i",
+	.queuecommand		= iscsi_queuecommand,
+	.eh_abort_handler	= iscsi_eh_abort,
+	.eh_device_reset_handler = iscsi_eh_device_reset,
+	.eh_target_reset_handler = iscsi_eh_target_reset,
+	.can_queue		= 1024,
+	.max_sectors		= 127,
+	.cmd_per_lun		= 32,
+	.this_id		= -1,
+	.use_clustering		= ENABLE_CLUSTERING,
+	.sg_tablesize		= ISCSI_MAX_BDS_PER_CMD,
+	.shost_attrs		= bnx2i_dev_attributes,
+};
+
+struct iscsi_transport bnx2i_iscsi_transport = {
+	.owner			= THIS_MODULE,
+	.name			= "bnx2i",
+	.caps			= CAP_RECOVERY_L0 | CAP_HDRDGST |
+				  CAP_MULTI_R2T | CAP_DATADGST |
+				  CAP_DATA_PATH_OFFLOAD,
+	.param_mask		= ISCSI_MAX_RECV_DLENGTH |
+				  ISCSI_MAX_XMIT_DLENGTH |
+				  ISCSI_HDRDGST_EN |
+				  ISCSI_DATADGST_EN |
+				  ISCSI_INITIAL_R2T_EN |
+				  ISCSI_MAX_R2T |
+				  ISCSI_IMM_DATA_EN |
+				  ISCSI_FIRST_BURST |
+				  ISCSI_MAX_BURST |
+				  ISCSI_PDU_INORDER_EN |
+				  ISCSI_DATASEQ_INORDER_EN |
+				  ISCSI_ERL |
+				  ISCSI_CONN_PORT |
+				  ISCSI_CONN_ADDRESS |
+				  ISCSI_EXP_STATSN |
+				  ISCSI_PERSISTENT_PORT |
+				  ISCSI_PERSISTENT_ADDRESS |
+				  ISCSI_TARGET_NAME | ISCSI_TPGT |
+				  ISCSI_USERNAME | ISCSI_PASSWORD |
+				  ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
+				  ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
+				  ISCSI_LU_RESET_TMO |
+				  ISCSI_PING_TMO | ISCSI_RECV_TMO |
+				  ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
+	.host_param_mask	= ISCSI_HOST_HWADDRESS | ISCSI_HOST_NETDEV_NAME,
+	.create_session		= bnx2i_session_create,
+	.destroy_session	= bnx2i_session_destroy,
+	.create_conn		= bnx2i_conn_create,
+	.bind_conn		= bnx2i_conn_bind,
+	.destroy_conn		= bnx2i_conn_destroy,
+	.set_param		= iscsi_set_param,
+	.get_conn_param		= bnx2i_conn_get_param,
+	.get_session_param	= iscsi_session_get_param,
+	.get_host_param		= bnx2i_host_get_param,
+	.start_conn		= bnx2i_conn_start,
+	.stop_conn		= iscsi_conn_stop,
+	.send_pdu		= iscsi_conn_send_pdu,
+	.xmit_task		= bnx2i_task_xmit,
+	.get_stats		= bnx2i_conn_get_stats,
+	/* TCP connect - disconnect - option-2 interface calls */
+	.ep_connect		= bnx2i_ep_connect,
+	.ep_poll		= bnx2i_ep_poll,
+	.ep_disconnect		= bnx2i_ep_disconnect,
+	.set_path		= bnx2i_nl_set_path,
+	/* Error recovery timeout call */
+	.session_recovery_timedout = iscsi_session_recovery_timedout,
+	.cleanup_task		= bnx2i_cleanup_task,
+};