[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>
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