[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, 771 insertions, 0 deletions

diff --git a/drivers/scsi/bnx2i/bnx2i.h b/drivers/scsi/bnx2i/bnx2i.h
new file mode 100644
index 0000000..d7576f2
--- /dev/null
+++ b/drivers/scsi/bnx2i/bnx2i.h
@@ -0,0 +1,771 @@
+/* bnx2i.h: 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)
+ */
+
+#ifndef _BNX2I_H_
+#define _BNX2I_H_
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/in.h>
+#include <linux/kfifo.h>
+#include <linux/netdevice.h>
+#include <linux/completion.h>
+
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi.h>
+#include <scsi/iscsi_proto.h>
+#include <scsi/libiscsi.h>
+#include <scsi/scsi_transport_iscsi.h>
+
+#include "../../net/cnic_if.h"
+#include "57xx_iscsi_hsi.h"
+#include "57xx_iscsi_constants.h"
+
+#define BNX2_ISCSI_DRIVER_NAME		"bnx2i"
+
+#define BNX2I_MAX_ADAPTERS		8
+
+#define ISCSI_MAX_CONNS_PER_HBA		128
+#define ISCSI_MAX_SESS_PER_HBA		ISCSI_MAX_CONNS_PER_HBA
+#define ISCSI_MAX_CMDS_PER_SESS		128
+
+/* Total active commands across all connections supported by devices */
+#define ISCSI_MAX_CMDS_PER_HBA_5708	(28 * (ISCSI_MAX_CMDS_PER_SESS - 1))
+#define ISCSI_MAX_CMDS_PER_HBA_5709	(128 * (ISCSI_MAX_CMDS_PER_SESS - 1))
+#define ISCSI_MAX_CMDS_PER_HBA_57710	(256 * (ISCSI_MAX_CMDS_PER_SESS - 1))
+
+#define ISCSI_MAX_BDS_PER_CMD		32
+
+#define MAX_PAGES_PER_CTRL_STRUCT_POOL	8
+#define BNX2I_RESERVED_SLOW_PATH_CMD_SLOTS	4
+
+/* 5706/08 hardware has limit on maximum buffer size per BD it can handle */
+#define MAX_BD_LENGTH			65535
+#define BD_SPLIT_SIZE			32768
+
+/* min, max & default values for SQ/RQ/CQ size, configurable via' modparam */
+#define BNX2I_SQ_WQES_MIN 		16
+#define BNX2I_570X_SQ_WQES_MAX 		128
+#define BNX2I_5770X_SQ_WQES_MAX 	512
+#define BNX2I_570X_SQ_WQES_DEFAULT 	128
+#define BNX2I_5770X_SQ_WQES_DEFAULT 	256
+
+#define BNX2I_570X_CQ_WQES_MAX 		128
+#define BNX2I_5770X_CQ_WQES_MAX 	512
+
+#define BNX2I_RQ_WQES_MIN 		16
+#define BNX2I_RQ_WQES_MAX 		32
+#define BNX2I_RQ_WQES_DEFAULT 		16
+
+/* CCELLs per conn */
+#define BNX2I_CCELLS_MIN		16
+#define BNX2I_CCELLS_MAX		96
+#define BNX2I_CCELLS_DEFAULT		64
+
+#define ITT_INVALID_SIGNATURE		0xFFFF
+
+#define ISCSI_CMD_CLEANUP_TIMEOUT	100
+
+#define BNX2I_CONN_CTX_BUF_SIZE		16384
+
+#define BNX2I_SQ_WQE_SIZE		64
+#define BNX2I_RQ_WQE_SIZE		256
+#define BNX2I_CQE_SIZE			64
+
+#define MB_KERNEL_CTX_SHIFT		8
+#define MB_KERNEL_CTX_SIZE		(1 << MB_KERNEL_CTX_SHIFT)
+
+#define CTX_SHIFT			7
+#define GET_CID_NUM(cid_addr)		((cid_addr) >> CTX_SHIFT)
+
+#define CTX_OFFSET 			0x10000
+#define MAX_CID_CNT			0x4000
+
+/* 5709 context registers */
+#define BNX2_MQ_CONFIG2			0x00003d00
+#define BNX2_MQ_CONFIG2_CONT_SZ		(0x7L<<4)
+#define BNX2_MQ_CONFIG2_FIRST_L4L5	(0x1fL<<8)
+
+/* 57710's BAR2 is mapped to doorbell registers */
+#define BNX2X_DOORBELL_PCI_BAR		2
+#define BNX2X_MAX_CQS			8
+
+#define CNIC_ARM_CQE			1
+#define CNIC_DISARM_CQE			0
+
+#define REG_RD(__hba, offset)				\
+		readl(__hba->regview + offset)
+#define REG_WR(__hba, offset, val)			\
+		writel(val, __hba->regview + offset)
+
+
+/**
+ * struct generic_pdu_resc - login pdu resource structure
+ *
+ * @req_buf:            driver buffer used to stage payload associated with
+ *                      the login request
+ * @req_dma_addr:       dma address for iscsi login request payload buffer
+ * @req_buf_size:       actual login request payload length
+ * @req_wr_ptr:         pointer into login request buffer when next data is
+ *                      to be written
+ * @resp_hdr:           iscsi header where iscsi login response header is to
+ *                      be recreated
+ * @resp_buf:           buffer to stage login response payload
+ * @resp_dma_addr:      login response payload buffer dma address
+ * @resp_buf_size:      login response paylod length
+ * @resp_wr_ptr:        pointer into login response buffer when next data is
+ *                      to be written
+ * @req_bd_tbl:         iscsi login request payload BD table
+ * @req_bd_dma:         login request BD table dma address
+ * @resp_bd_tbl:        iscsi login response payload BD table
+ * @resp_bd_dma:        login request BD table dma address
+ *
+ * following structure defines buffer info for generic pdus such as iSCSI Login,
+ *	Logout and NOP
+ */
+struct generic_pdu_resc {
+	char *req_buf;
+	dma_addr_t req_dma_addr;
+	u32 req_buf_size;
+	char *req_wr_ptr;
+	struct iscsi_hdr resp_hdr;
+	char *resp_buf;
+	dma_addr_t resp_dma_addr;
+	u32 resp_buf_size;
+	char *resp_wr_ptr;
+	char *req_bd_tbl;
+	dma_addr_t req_bd_dma;
+	char *resp_bd_tbl;
+	dma_addr_t resp_bd_dma;
+};
+
+
+/**
+ * struct bd_resc_page - tracks DMA'able memory allocated for BD tables
+ *
+ * @link:               list head to link elements
+ * @max_ptrs:           maximun pointers that can be stored in this page
+ * @num_valid:          number of pointer valid in this page
+ * @page:               base addess for page pointer array
+ *
+ * structure to track DMA'able memory allocated for command BD tables
+ */
+struct bd_resc_page {
+	struct list_head link;
+	u32 max_ptrs;
+	u32 num_valid;
+	void *page[1];
+};
+
+
+/**
+ * struct io_bdt - I/O buffer destricptor table
+ *
+ * @bd_tbl:             BD table's virtual address
+ * @bd_tbl_dma:         BD table's dma address
+ * @bd_valid:           num valid BD entries
+ *
+ * IO BD table
+ */
+struct io_bdt {
+	struct iscsi_bd *bd_tbl;
+	dma_addr_t bd_tbl_dma;
+	u16 bd_valid;
+};
+
+
+/**
+ * bnx2i_cmd - iscsi command structure
+ *
+ * @scsi_cmd:           SCSI-ML task pointer corresponding to this iscsi cmd
+ * @sg:                 SG list
+ * @io_tbl:             buffer descriptor (BD) table
+ * @bd_tbl_dma:         buffer descriptor (BD) table's dma address
+ */
+struct bnx2i_cmd {
+	struct iscsi_hdr hdr;
+	struct bnx2i_conn *conn;
+	struct scsi_cmnd *scsi_cmd;
+	struct scatterlist *sg;
+	struct io_bdt io_tbl;
+	dma_addr_t bd_tbl_dma;
+	struct bnx2i_cmd_request req;
+};
+
+
+/**
+ * struct bnx2i_conn - iscsi connection structure
+ *
+ * @cls_conn:              pointer to iscsi cls conn
+ * @hba:                   adapter structure pointer
+ * @iscsi_conn_cid:        iscsi conn id
+ * @fw_cid:                firmware iscsi context id
+ * @ep:                    endpoint structure pointer
+ * @gen_pdu:               login/nopout/logout pdu resources
+ * @violation_notified:    bit mask used to track iscsi error/warning messages
+ *                         already printed out
+ *
+ * iSCSI connection structure
+ */
+struct bnx2i_conn {
+	struct iscsi_cls_conn *cls_conn;
+	struct bnx2i_hba *hba;
+	struct completion cmd_cleanup_cmpl;
+	int is_bound;
+
+	u32 iscsi_conn_cid;
+#define BNX2I_CID_RESERVED	0x5AFF
+	u32 fw_cid;
+
+	struct timer_list poll_timer;
+	/*
+	 * Queue Pair (QP) related structure elements.
+	 */
+	struct bnx2i_endpoint *ep;
+
+	/*
+	 * Buffer for login negotiation process
+	 */
+	struct generic_pdu_resc gen_pdu;
+	u64 violation_notified;
+};
+
+
+
+/**
+ * struct iscsi_cid_queue - Per adapter iscsi cid queue
+ *
+ * @cid_que_base:           queue base memory
+ * @cid_que:                queue memory pointer
+ * @cid_q_prod_idx:         produce index
+ * @cid_q_cons_idx:         consumer index
+ * @cid_q_max_idx:          max index. used to detect wrap around condition
+ * @cid_free_cnt:           queue size
+ * @conn_cid_tbl:           iscsi cid to conn structure mapping table
+ *
+ * Per adapter iSCSI CID Queue
+ */
+struct iscsi_cid_queue {
+	void *cid_que_base;
+	u32 *cid_que;
+	u32 cid_q_prod_idx;
+	u32 cid_q_cons_idx;
+	u32 cid_q_max_idx;
+	u32 cid_free_cnt;
+	struct bnx2i_conn **conn_cid_tbl;
+};
+
+/**
+ * struct bnx2i_hba - bnx2i adapter structure
+ *
+ * @link:                  list head to link elements
+ * @cnic:                  pointer to cnic device
+ * @pcidev:                pointer to pci dev
+ * @netdev:                pointer to netdev structure
+ * @regview:               mapped PCI register space
+ * @age:                   age, incremented by every recovery
+ * @cnic_dev_type:         cnic device type, 5706/5708/5709/57710
+ * @mail_queue_access:     mailbox queue access mode, applicable to 5709 only
+ * @reg_with_cnic:         indicates whether the device is register with CNIC
+ * @adapter_state:         adapter state, UP, GOING_DOWN, LINK_DOWN
+ * @mtu_supported:         Ethernet MTU supported
+ * @shost:                 scsi host pointer
+ * @max_sqes:              SQ size
+ * @max_rqes:              RQ size
+ * @max_cqes:              CQ size
+ * @num_ccell:             number of command cells per connection
+ * @ofld_conns_active:     active connection list
+ * @max_active_conns:      max offload connections supported by this device
+ * @cid_que:               iscsi cid queue
+ * @ep_rdwr_lock:          read / write lock to synchronize various ep lists
+ * @ep_ofld_list:          connection list for pending offload completion
+ * @ep_destroy_list:       connection list for pending offload completion
+ * @mp_bd_tbl:             BD table to be used with middle path requests
+ * @mp_bd_dma:             DMA address of 'mp_bd_tbl' memory buffer
+ * @dummy_buffer:          Dummy buffer to be used with zero length scsicmd reqs
+ * @dummy_buf_dma:         DMA address of 'dummy_buffer' memory buffer
+ * @lock:              	   lock to synchonize access to hba structure
+ * @pci_did:               PCI device ID
+ * @pci_vid:               PCI vendor ID
+ * @pci_sdid:              PCI subsystem device ID
+ * @pci_svid:              PCI subsystem vendor ID
+ * @pci_func:              PCI function number in system pci tree
+ * @pci_devno:             PCI device number in system pci tree
+ * @num_wqe_sent:          statistic counter, total wqe's sent
+ * @num_cqe_rcvd:          statistic counter, total cqe's received
+ * @num_intr_claimed:      statistic counter, total interrupts claimed
+ * @link_changed_count:    statistic counter, num of link change notifications
+ *                         received
+ * @ipaddr_changed_count:  statistic counter, num times IP address changed while
+ *                         at least one connection is offloaded
+ * @num_sess_opened:       statistic counter, total num sessions opened
+ * @num_conn_opened:       statistic counter, total num conns opened on this hba
+ * @ctx_ccell_tasks:       captures number of ccells and tasks supported by
+ *                         currently offloaded connection, used to decode
+ *                         context memory
+ *
+ * Adapter Data Structure
+ */
+struct bnx2i_hba {
+	struct list_head link;
+	struct cnic_dev *cnic;
+	struct pci_dev *pcidev;
+	struct net_device *netdev;
+	void __iomem *regview;
+
+	u32 age;
+	unsigned long cnic_dev_type;
+		#define BNX2I_NX2_DEV_5706		0x0
+		#define BNX2I_NX2_DEV_5708		0x1
+		#define BNX2I_NX2_DEV_5709		0x2
+		#define BNX2I_NX2_DEV_57710		0x3
+	u32 mail_queue_access;
+		#define BNX2I_MQ_KERNEL_MODE		0x0
+		#define BNX2I_MQ_KERNEL_BYPASS_MODE	0x1
+		#define BNX2I_MQ_BIN_MODE		0x2
+	unsigned long  reg_with_cnic;
+		#define BNX2I_CNIC_REGISTERED		1
+
+	unsigned long  adapter_state;
+		#define ADAPTER_STATE_UP		0
+		#define ADAPTER_STATE_GOING_DOWN	1
+		#define ADAPTER_STATE_LINK_DOWN		2
+		#define ADAPTER_STATE_INIT_FAILED	31
+	unsigned int mtu_supported;
+		#define BNX2I_MAX_MTU_SUPPORTED		1500
+
+	struct Scsi_Host *shost;
+
+	u32 max_sqes;
+	u32 max_rqes;
+	u32 max_cqes;
+	u32 num_ccell;
+
+	int ofld_conns_active;
+
+	int max_active_conns;
+	struct iscsi_cid_queue cid_que;
+
+	rwlock_t ep_rdwr_lock;
+	struct list_head ep_ofld_list;
+	struct list_head ep_destroy_list;
+
+	/*
+	 * BD table to be used with MP (Middle Path requests.
+	 */
+	char *mp_bd_tbl;
+	dma_addr_t mp_bd_dma;
+	char *dummy_buffer;
+	dma_addr_t dummy_buf_dma;
+
+	spinlock_t lock;	/* protects hba structure access */
+	struct mutex net_dev_lock;/* sync net device access */
+
+	/*
+	 * PCI related info.
+	 */
+	u16 pci_did;
+	u16 pci_vid;
+	u16 pci_sdid;
+	u16 pci_svid;
+	u16 pci_func;
+	u16 pci_devno;
+
+	/*
+	 * Following are a bunch of statistics useful during development
+	 * and later stage for score boarding.
+	 */
+	u32 num_wqe_sent;
+	u32 num_cqe_rcvd;
+	u32 num_intr_claimed;
+	u32 link_changed_count;
+	u32 ipaddr_changed_count;
+	u32 num_sess_opened;
+	u32 num_conn_opened;
+	unsigned int ctx_ccell_tasks;
+};
+
+
+/*******************************************************************************
+ * 	QP [ SQ / RQ / CQ ] info.
+ ******************************************************************************/
+
+/*
+ * SQ/RQ/CQ generic structure definition
+ */
+struct 	sqe {
+	u8 sqe_byte[BNX2I_SQ_WQE_SIZE];
+};
+
+struct 	rqe {
+	u8 rqe_byte[BNX2I_RQ_WQE_SIZE];
+};
+
+struct 	cqe {
+	u8 cqe_byte[BNX2I_CQE_SIZE];
+};
+
+
+enum {
+#if defined(__LITTLE_ENDIAN)
+	CNIC_EVENT_COAL_INDEX	= 0x0,
+	CNIC_SEND_DOORBELL	= 0x4,
+	CNIC_EVENT_CQ_ARM	= 0x7,
+	CNIC_RECV_DOORBELL	= 0x8
+#elif defined(__BIG_ENDIAN)
+	CNIC_EVENT_COAL_INDEX	= 0x2,
+	CNIC_SEND_DOORBELL	= 0x6,
+	CNIC_EVENT_CQ_ARM	= 0x4,
+	CNIC_RECV_DOORBELL	= 0xa
+#endif
+};
+
+
+/*
+ * CQ DB
+ */
+struct bnx2x_iscsi_cq_pend_cmpl {
+	/* CQ producer, updated by Ustorm */
+	u16 ustrom_prod;
+	/* CQ pending completion counter */
+	u16 pend_cntr;
+};
+
+
+struct bnx2i_5771x_cq_db {
+	struct bnx2x_iscsi_cq_pend_cmpl qp_pend_cmpl[BNX2X_MAX_CQS];
+	/* CQ pending completion ITT array */
+	u16 itt[BNX2X_MAX_CQS];
+	/* Cstorm CQ sequence to notify array, updated by driver */;
+	u16 sqn[BNX2X_MAX_CQS];
+	u32 reserved[4] /* 16 byte allignment */;
+};
+
+
+struct bnx2i_5771x_sq_rq_db {
+	u16 prod_idx;
+	u8 reserved0[14]; /* Pad structure size to 16 bytes */
+};
+
+
+struct bnx2i_5771x_dbell_hdr {
+	u8 header;
+	/* 1 for rx doorbell, 0 for tx doorbell */
+#define B577XX_DOORBELL_HDR_RX				(0x1<<0)
+#define B577XX_DOORBELL_HDR_RX_SHIFT			0
+	/* 0 for normal doorbell, 1 for advertise wnd doorbell */
+#define B577XX_DOORBELL_HDR_DB_TYPE			(0x1<<1)
+#define B577XX_DOORBELL_HDR_DB_TYPE_SHIFT		1
+	/* rdma tx only: DPM transaction size specifier (64/128/256/512B) */
+#define B577XX_DOORBELL_HDR_DPM_SIZE			(0x3<<2)
+#define B577XX_DOORBELL_HDR_DPM_SIZE_SHIFT		2
+	/* connection type */
+#define B577XX_DOORBELL_HDR_CONN_TYPE			(0xF<<4)
+#define B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT		4
+};
+
+struct bnx2i_5771x_dbell {
+	struct bnx2i_5771x_dbell_hdr dbell;
+	u8 pad[3];
+
+};
+
+/**
+ * struct qp_info - QP (share queue region) atrributes structure
+ *
+ * @ctx_base:           ioremapped pci register base to access doorbell register
+ *                      pertaining to this offloaded connection
+ * @sq_virt:            virtual address of send queue (SQ) region
+ * @sq_phys:            DMA address of SQ memory region
+ * @sq_mem_size:        SQ size
+ * @sq_prod_qe:         SQ producer entry pointer
+ * @sq_cons_qe:         SQ consumer entry pointer
+ * @sq_first_qe:        virtaul address of first entry in SQ
+ * @sq_last_qe:         virtaul address of last entry in SQ
+ * @sq_prod_idx:        SQ producer index
+ * @sq_cons_idx:        SQ consumer index
+ * @sqe_left:           number sq entry left
+ * @sq_pgtbl_virt:      page table describing buffer consituting SQ region
+ * @sq_pgtbl_phys:      dma address of 'sq_pgtbl_virt'
+ * @sq_pgtbl_size:      SQ page table size
+ * @cq_virt:            virtual address of completion queue (CQ) region
+ * @cq_phys:            DMA address of RQ memory region
+ * @cq_mem_size:        CQ size
+ * @cq_prod_qe:         CQ producer entry pointer
+ * @cq_cons_qe:         CQ consumer entry pointer
+ * @cq_first_qe:        virtaul address of first entry in CQ
+ * @cq_last_qe:         virtaul address of last entry in CQ
+ * @cq_prod_idx:        CQ producer index
+ * @cq_cons_idx:        CQ consumer index
+ * @cqe_left:           number cq entry left
+ * @cqe_size:           size of each CQ entry
+ * @cqe_exp_seq_sn:     next expected CQE sequence number
+ * @cq_pgtbl_virt:      page table describing buffer consituting CQ region
+ * @cq_pgtbl_phys:      dma address of 'cq_pgtbl_virt'
+ * @cq_pgtbl_size:    	CQ page table size
+ * @rq_virt:            virtual address of receive queue (RQ) region
+ * @rq_phys:            DMA address of RQ memory region
+ * @rq_mem_size:        RQ size
+ * @rq_prod_qe:         RQ producer entry pointer
+ * @rq_cons_qe:         RQ consumer entry pointer
+ * @rq_first_qe:        virtaul address of first entry in RQ
+ * @rq_last_qe:         virtaul address of last entry in RQ
+ * @rq_prod_idx:        RQ producer index
+ * @rq_cons_idx:        RQ consumer index
+ * @rqe_left:           number rq entry left
+ * @rq_pgtbl_virt:      page table describing buffer consituting RQ region
+ * @rq_pgtbl_phys:      dma address of 'rq_pgtbl_virt'
+ * @rq_pgtbl_size:      RQ page table size
+ *
+ * queue pair (QP) is a per connection shared data structure which is used
+ *	to send work requests (SQ), receive completion notifications (CQ)
+ *	and receive asynchoronous / scsi sense info (RQ). 'qp_info' structure
+ *	below holds queue memory, consumer/producer indexes and page table
+ *	information
+ */
+struct qp_info {
+	void __iomem *ctx_base;
+#define DPM_TRIGER_TYPE			0x40
+
+#define BNX2I_570x_QUE_DB_SIZE		0
+#define BNX2I_5771x_QUE_DB_SIZE		16
+	struct sqe *sq_virt;
+	dma_addr_t sq_phys;
+	u32 sq_mem_size;
+
+	struct sqe *sq_prod_qe;
+	struct sqe *sq_cons_qe;
+	struct sqe *sq_first_qe;
+	struct sqe *sq_last_qe;
+	u16 sq_prod_idx;
+	u16 sq_cons_idx;
+	u32 sqe_left;
+
+	void *sq_pgtbl_virt;
+	dma_addr_t sq_pgtbl_phys;
+	u32 sq_pgtbl_size;	/* set to PAGE_SIZE for 5708 & 5709 */
+
+	struct cqe *cq_virt;
+	dma_addr_t cq_phys;
+	u32 cq_mem_size;
+
+	struct cqe *cq_prod_qe;
+	struct cqe *cq_cons_qe;
+	struct cqe *cq_first_qe;
+	struct cqe *cq_last_qe;
+	u16 cq_prod_idx;
+	u16 cq_cons_idx;
+	u32 cqe_left;
+	u32 cqe_size;
+	u32 cqe_exp_seq_sn;
+
+	void *cq_pgtbl_virt;
+	dma_addr_t cq_pgtbl_phys;
+	u32 cq_pgtbl_size;	/* set to PAGE_SIZE for 5708 & 5709 */
+
+	struct rqe *rq_virt;
+	dma_addr_t rq_phys;
+	u32 rq_mem_size;
+
+	struct rqe *rq_prod_qe;
+	struct rqe *rq_cons_qe;
+	struct rqe *rq_first_qe;
+	struct rqe *rq_last_qe;
+	u16 rq_prod_idx;
+	u16 rq_cons_idx;
+	u32 rqe_left;
+
+	void *rq_pgtbl_virt;
+	dma_addr_t rq_pgtbl_phys;
+	u32 rq_pgtbl_size;	/* set to PAGE_SIZE for 5708 & 5709 */
+};
+
+
+
+/*
+ * CID handles
+ */
+struct ep_handles {
+	u32 fw_cid;
+	u32 drv_iscsi_cid;
+	u16 pg_cid;
+	u16 rsvd;
+};
+
+
+enum {
+	EP_STATE_IDLE                   = 0x0,
+	EP_STATE_PG_OFLD_START          = 0x1,
+	EP_STATE_PG_OFLD_COMPL          = 0x2,
+	EP_STATE_OFLD_START             = 0x4,
+	EP_STATE_OFLD_COMPL             = 0x8,
+	EP_STATE_CONNECT_START          = 0x10,
+	EP_STATE_CONNECT_COMPL          = 0x20,
+	EP_STATE_ULP_UPDATE_START       = 0x40,
+	EP_STATE_ULP_UPDATE_COMPL       = 0x80,
+	EP_STATE_DISCONN_START          = 0x100,
+	EP_STATE_DISCONN_COMPL          = 0x200,
+	EP_STATE_CLEANUP_START          = 0x400,
+	EP_STATE_CLEANUP_CMPL           = 0x800,
+	EP_STATE_TCP_FIN_RCVD           = 0x1000,
+	EP_STATE_TCP_RST_RCVD           = 0x2000,
+	EP_STATE_PG_OFLD_FAILED         = 0x1000000,
+	EP_STATE_ULP_UPDATE_FAILED      = 0x2000000,
+	EP_STATE_CLEANUP_FAILED         = 0x4000000,
+	EP_STATE_OFLD_FAILED            = 0x8000000,
+	EP_STATE_CONNECT_FAILED         = 0x10000000,
+	EP_STATE_DISCONN_TIMEDOUT       = 0x20000000,
+};
+
+/**
+ * struct bnx2i_endpoint - representation of tcp connection in NX2 world
+ *
+ * @link:               list head to link elements
+ * @hba:                adapter to which this connection belongs
+ * @conn:               iscsi connection this EP is linked to
+ * @sess:               iscsi session this EP is linked to
+ * @cm_sk:              cnic sock struct
+ * @hba_age:            age to detect if 'iscsid' issues ep_disconnect()
+ *                      after HBA reset is completed by bnx2i/cnic/bnx2
+ *                      modules
+ * @state:              tracks offload connection state machine
+ * @teardown_mode:      indicates if conn teardown is abortive or orderly
+ * @qp:                 QP information
+ * @ids:                contains chip allocated *context id* & driver assigned
+ *                      *iscsi cid*
+ * @ofld_timer:         offload timer to detect timeout
+ * @ofld_wait:          wait queue
+ *
+ * Endpoint Structure - equivalent of tcp socket structure
+ */
+struct bnx2i_endpoint {
+	struct list_head link;
+	struct bnx2i_hba *hba;
+	struct bnx2i_conn *conn;
+	struct cnic_sock *cm_sk;
+	u32 hba_age;
+	u32 state;
+	unsigned long timestamp;
+	int num_active_cmds;
+
+	struct qp_info qp;
+	struct ep_handles ids;
+		#define ep_iscsi_cid	ids.drv_iscsi_cid
+		#define ep_cid		ids.fw_cid
+		#define ep_pg_cid	ids.pg_cid
+	struct timer_list ofld_timer;
+	wait_queue_head_t ofld_wait;
+};
+
+
+
+/* Global variables */
+extern unsigned int error_mask1, error_mask2;
+extern u64 iscsi_error_mask;
+extern unsigned int en_tcp_dack;
+extern unsigned int event_coal_div;
+
+extern struct scsi_transport_template *bnx2i_scsi_xport_template;
+extern struct iscsi_transport bnx2i_iscsi_transport;
+extern struct cnic_ulp_ops bnx2i_cnic_cb;
+
+extern unsigned int sq_size;
+extern unsigned int rq_size;
+
+extern struct device_attribute *bnx2i_dev_attributes[];
+
+
+
+/*
+ * Function Prototypes
+ */
+extern void bnx2i_identify_device(struct bnx2i_hba *hba);
+extern void bnx2i_register_device(struct bnx2i_hba *hba);
+
+extern void bnx2i_ulp_init(struct cnic_dev *dev);
+extern void bnx2i_ulp_exit(struct cnic_dev *dev);
+extern void bnx2i_start(void *handle);
+extern void bnx2i_stop(void *handle);
+extern void bnx2i_reg_dev_all(void);
+extern void bnx2i_unreg_dev_all(void);
+extern struct bnx2i_hba *get_adapter_list_head(void);
+
+struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
+					  u16 iscsi_cid);
+
+int bnx2i_alloc_ep_pool(void);
+void bnx2i_release_ep_pool(void);
+struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba);
+struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba);
+
+struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic);
+
+struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic);
+void bnx2i_free_hba(struct bnx2i_hba *hba);
+
+void bnx2i_get_rq_buf(struct bnx2i_conn *conn, char *ptr, int len);
+void bnx2i_put_rq_buf(struct bnx2i_conn *conn, int count);
+
+void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd);
+
+void bnx2i_drop_session(struct iscsi_cls_session *session);
+
+extern int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba);
+extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn,
+				  struct iscsi_task *mtask);
+extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn,
+				  struct iscsi_task *mtask);
+extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn,
+				    struct bnx2i_cmd *cmnd);
+extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn,
+				   struct iscsi_task *mtask, u32 ttt,
+				   char *datap, int data_len, int unsol);
+extern int bnx2i_send_iscsi_logout(struct bnx2i_conn *conn,
+				   struct iscsi_task *mtask);
+extern void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba,
+				       struct bnx2i_cmd *cmd);
+extern void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba,
+				     struct bnx2i_endpoint *ep);
+extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn);
+extern void bnx2i_send_conn_destroy(struct bnx2i_hba *hba,
+				    struct bnx2i_endpoint *ep);
+
+extern int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba,
+			       struct bnx2i_endpoint *ep);
+extern void bnx2i_free_qp_resc(struct bnx2i_hba *hba,
+			       struct bnx2i_endpoint *ep);
+extern void bnx2i_ep_ofld_timer(unsigned long data);
+extern struct bnx2i_endpoint *bnx2i_find_ep_in_ofld_list(
+		struct bnx2i_hba *hba, u32 iscsi_cid);
+extern struct bnx2i_endpoint *bnx2i_find_ep_in_destroy_list(
+		struct bnx2i_hba *hba, u32 iscsi_cid);
+
+extern int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep);
+extern void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action);
+
+/* Debug related function prototypes */
+extern void bnx2i_print_pend_cmd_queue(struct bnx2i_conn *conn);
+extern void bnx2i_print_active_cmd_queue(struct bnx2i_conn *conn);
+extern void bnx2i_print_xmit_pdu_queue(struct bnx2i_conn *conn);
+extern void bnx2i_print_recv_state(struct bnx2i_conn *conn);
+
+#endif