bnx2i_iscsi.c 58.6 KB
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/*
 * 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)
 */

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#include <linux/slab.h>
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#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;
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	bnx2i_ep->cls_ep = ep;
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	INIT_LIST_HEAD(&bnx2i_ep->link);
	bnx2i_ep->state = EP_STATE_IDLE;
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	bnx2i_ep->ep_iscsi_cid = (u16) -1;
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	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;

		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;
}

711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742
/**
 * bnx2i_ep_active_list_add - add an entry to ep active list
 * @hba:	pointer to adapter instance
 * @ep:		pointer to endpoint (transport indentifier) structure
 *
 * current active conn queue manager
 */
static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,
				     struct bnx2i_endpoint *ep)
{
	write_lock_bh(&hba->ep_rdwr_lock);
	list_add_tail(&ep->link, &hba->ep_active_list);
	write_unlock_bh(&hba->ep_rdwr_lock);
}


/**
 * bnx2i_ep_active_list_del - deletes an entry to ep active list
 * @hba:	pointer to adapter instance
 * @ep:		pointer to endpoint (transport indentifier) structure
 *
 * current active conn queue manager
 */
static void bnx2i_ep_active_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);
}


743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818
/**
 * 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_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);
819
	INIT_LIST_HEAD(&hba->ep_active_list);
820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855
	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);
856
	init_waitqueue_head(&hba->eh_wait);
857
	if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
858
		hba->hba_shutdown_tmo = 20 * HZ;
859 860 861
		hba->conn_teardown_tmo = 20 * HZ;
		hba->conn_ctx_destroy_tmo = 6 * HZ;
	} else {	/* 5706/5708/5709 */
862
		hba->hba_shutdown_tmo = 20 * HZ;
863 864 865
		hba->conn_teardown_tmo = 10 * HZ;
		hba->conn_ctx_destroy_tmo = 2 * HZ;
	}
866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897

	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);
898
	INIT_LIST_HEAD(&hba->ep_active_list);
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	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,
						     buf, data_len, 1);
		else
			rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
						     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 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,
1284
					  cmds_max, 0, sizeof(struct bnx2i_cmd),
1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471
					  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;

	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)
1472 1473
			len = sprintf(buf, "%pI4\n",
				      &bnx2i_conn->ep->cm_sk->dst_ip);
1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500
		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;
1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520
	case ISCSI_HOST_PARAM_IPADDRESS: {
		struct list_head *active_list = &hba->ep_active_list;

		read_lock_bh(&hba->ep_rdwr_lock);
		if (!list_empty(&hba->ep_active_list)) {
			struct bnx2i_endpoint *bnx2i_ep;
			struct cnic_sock *csk;

			bnx2i_ep = list_first_entry(active_list,
						    struct bnx2i_endpoint,
						    link);
			csk = bnx2i_ep->cm_sk;
			if (test_bit(SK_F_IPV6, &csk->flags))
				len = sprintf(buf, "%pI6\n", csk->src_ip);
			else
				len = sprintf(buf, "%pI4\n", csk->src_ip);
		}
		read_unlock_bh(&hba->ep_rdwr_lock);
		break;
	}
1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642
	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)
{
1643
	if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)
1644 1645 1646 1647
		hba->cnic->cm_destroy(ep->cm_sk);

	if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
	    ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662
		if (ep->conn && ep->conn->cls_conn &&
		    ep->conn->cls_conn->dd_data) {
			struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;

			/* Must suspend all rx queue activity for this ep */
			set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
		}
		/* CONN_DISCONNECT timeout may or may not be an issue depending
		 * on what transcribed in TCP layer, different targets behave
		 * differently
		 */
		printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "
				  "please submit GRC Dump, NW/PCIe trace, "
				  "driver msgs to developers for analysis\n",
				  hba->netdev->name);
1663 1664 1665 1666
	}

	ep->state = EP_STATE_CLEANUP_START;
	init_timer(&ep->ofld_timer);
1667
	ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718
	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;

1719
	if (shost) {
1720 1721
		/* driver is given scsi host to work with */
		hba = iscsi_host_priv(shost);
1722 1723 1724
		/* Register the device with cnic if not already done so */
		bnx2i_register_device(hba);
	} else
1725 1726 1727 1728 1729
		/*
		 * check if the given destination can be reached through
		 * a iscsi capable NetXtreme2 device
		 */
		hba = bnx2i_check_route(dst_addr);
1730

1731 1732
	if (!hba || test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state)) {
		rc = -EINVAL;
1733
		goto nohba;
1734 1735 1736
	}

	cnic = hba->cnic;
1737
	mutex_lock(&hba->net_dev_lock);
1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824
	ep = bnx2i_alloc_ep(hba);
	if (!ep) {
		rc = -ENOMEM;
		goto check_busy;
	}
	bnx2i_ep = ep->dd_data;

	if (bnx2i_adapter_ready(hba)) {
		rc = -EPERM;
		goto net_if_down;
	}

	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;

1825 1826
	bnx2i_ep_active_list_add(hba, bnx2i_ep);

1827
	if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1828 1829
		goto del_active_ep;

1830 1831 1832
	mutex_unlock(&hba->net_dev_lock);
	return ep;

1833 1834
del_active_ep:
	bnx2i_ep_active_list_del(hba, bnx2i_ep);
1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846
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);
check_busy:
1847 1848
	mutex_unlock(&hba->net_dev_lock);
nohba:
1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881
	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));
1882
	if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918
		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:
1919 1920
	case EP_STATE_LOGOUT_SENT:
	case EP_STATE_LOGOUT_RESP_RCVD:
1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940
	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;
}


1941 1942 1943
/*
 * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
 * @ep:		TCP connection (bnx2i endpoint) handle
1944 1945 1946
 *
 * executes  TCP connection teardown process
 */
1947
int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
1948
{
1949
	struct bnx2i_hba *hba = bnx2i_ep->hba;
1950
	struct cnic_dev *cnic;
1951 1952 1953
	struct iscsi_session *session = NULL;
	struct iscsi_conn *conn = NULL;
	int ret = 0;
1954 1955
	int close = 0;
	int close_ret = 0;
1956

1957 1958
	if (!hba)
		return 0;
1959

1960 1961 1962 1963
	cnic = hba->cnic;
	if (!cnic)
		return 0;

1964 1965 1966
	if (bnx2i_ep->state == EP_STATE_IDLE)
		return 0;

1967 1968
	if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
		goto destroy_conn;
1969 1970

	if (bnx2i_ep->conn) {
1971
		conn = bnx2i_ep->conn->cls_conn->dd_data;
1972 1973 1974 1975
		session = conn->session;
	}

	init_timer(&bnx2i_ep->ofld_timer);
1976
	bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
1977 1978 1979 1980
	bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
	bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
	add_timer(&bnx2i_ep->ofld_timer);

1981
	if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
1982
		goto out;
1983

1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
	if (session) {
		spin_lock_bh(&session->lock);
		if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
			if (session->state == ISCSI_STATE_LOGGING_OUT) {
				if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
					/* Logout sent, but no resp */
					printk(KERN_ALERT "bnx2i - WARNING "
						"logout response was not "
						"received!\n");
				} else if (bnx2i_ep->state ==
					   EP_STATE_LOGOUT_RESP_RCVD)
					close = 1;
			}
		} else
			close = 1;

		spin_unlock_bh(&session->lock);
	}

	bnx2i_ep->state = EP_STATE_DISCONN_START;

	if (close)
		close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
	else
		close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);

2010
	/* No longer allow CFC delete if cm_close/abort fails the request */
2011
	if (close_ret)
2012 2013 2014 2015 2016
		printk(KERN_ALERT "bnx2i: %s close/abort(%d) returned %d\n",
			bnx2i_ep->hba->netdev->name, close, close_ret);
	else
		/* wait for option-2 conn teardown */
		wait_event_interruptible(bnx2i_ep->ofld_wait,
2017 2018 2019 2020 2021 2022
				 bnx2i_ep->state != EP_STATE_DISCONN_START);

	if (signal_pending(current))
		flush_signals(current);
	del_timer_sync(&bnx2i_ep->ofld_timer);

2023
destroy_conn:
2024
	bnx2i_ep_active_list_del(hba, bnx2i_ep);
2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075
	if (bnx2i_tear_down_conn(hba, bnx2i_ep))
		ret = -EINVAL;
out:
	bnx2i_ep->state = EP_STATE_IDLE;
	return ret;
}


/**
 * bnx2i_ep_disconnect - executes TCP connection teardown process
 * @ep:		TCP connection (iscsi 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_conn *conn = NULL;
	struct bnx2i_hba *hba;

	bnx2i_ep = ep->dd_data;

	/* driver should not attempt connection cleanup until 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;
		iscsi_suspend_queue(conn);
	}
	hba = bnx2i_ep->hba;

	mutex_lock(&hba->net_dev_lock);

	if (bnx2i_ep->state == EP_STATE_IDLE)
		goto return_bnx2i_ep;

	if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
		goto free_resc;

	if (bnx2i_ep->hba_age != hba->age)
		goto free_resc;

	/* Do all chip cleanup here */
	if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {
2076 2077 2078 2079 2080 2081 2082 2083 2084 2085
		mutex_unlock(&hba->net_dev_lock);
		return;
	}
free_resc:
	bnx2i_free_qp_resc(hba, bnx2i_ep);
return_bnx2i_ep:
	if (bnx2i_conn)
		bnx2i_conn->ep = NULL;

	bnx2i_free_ep(ep);
2086
	mutex_unlock(&hba->net_dev_lock);
2087 2088
	if (!hba->ofld_conns_active)
		bnx2i_unreg_dev_all();
2089 2090

	wake_up_interruptible(&hba->eh_wait);
2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123
}


/**
 * 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,
2124
	.eh_target_reset_handler = iscsi_eh_recover_target,
2125
	.change_queue_depth	= iscsi_change_queue_depth,
2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161
	.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 |
2162
				  ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
2163 2164
				  ISCSI_PING_TMO | ISCSI_RECV_TMO |
				  ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
2165 2166
	.host_param_mask	= ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
				  ISCSI_HOST_NETDEV_NAME,
2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189
	.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,
};