/* bnx2i.h: QLogic NetXtreme II iSCSI driver.
*
* Copyright (c) 2006 - 2013 Broadcom Corporation
* Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
* Copyright (c) 2007, 2008 Mike Christie
* Copyright (c) 2014, QLogic Corporation
*
* 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)
* Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)
* Maintained by: QLogic-Storage-Upstream@qlogic.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/delay.h>
#include <linux/sched.h>
#include <linux/in.h>
#include <linux/kfifo.h>
#include <linux/netdevice.h>
#include <linux/completion.h>
#include <linux/kthread.h>
#include <linux/cpu.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/ethernet/broadcom/cnic_if.h"
#include "57xx_iscsi_hsi.h"
#include "57xx_iscsi_constants.h"
#include "../../net/ethernet/broadcom/bnx2x/bnx2x_mfw_req.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
#define BNX2X_DB_SHIFT 3
/* 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 128
#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
#define BNX2I_570X_PAGE_SIZE_DEFAULT 4096
/* 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_ARM_CQE_FP 2
#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)
#ifdef CONFIG_32BIT
#define GET_STATS_64(__hba, dst, field) \
do { \
spin_lock_bh(&__hba->stat_lock); \
dst->field##_lo = __hba->stats.field##_lo; \
dst->field##_hi = __hba->stats.field##_hi; \
spin_unlock_bh(&__hba->stat_lock); \
} while (0)
#define ADD_STATS_64(__hba, field, len) \
do { \
if (spin_trylock(&__hba->stat_lock)) { \
if (__hba->stats.field##_lo + len < \
__hba->stats.field##_lo) \
__hba->stats.field##_hi++; \
__hba->stats.field##_lo += len; \
spin_unlock(&__hba->stat_lock); \
} \
} while (0)
#else
#define GET_STATS_64(__hba, dst, field) \
do { \
u64 val, *out; \
\
val = __hba->bnx2i_stats.field; \
out = (u64 *)&__hba->stats.field##_lo; \
*out = cpu_to_le64(val); \
out = (u64 *)&dst->field##_lo; \
*out = cpu_to_le64(val); \
} while (0)
#define ADD_STATS_64(__hba, field, len) \
do { \
__hba->bnx2i_stats.field += len; \
} while (0)
#endif
/**
* 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
*
* @hdr: iSCSI header
* @conn: iscsi_conn pointer
* @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
* @req: bnx2i specific command request struct
*/
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
* @work_cnt: keeps track of the number of outstanding work
*
* iSCSI connection structure
*/
struct bnx2i_conn {
struct iscsi_cls_conn *cls_conn;
struct bnx2i_hba *hba;
struct completion cmd_cleanup_cmpl;
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;
atomic_t work_cnt;
};
/**
* 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_stats_info {
u64 rx_pdus;
u64 rx_bytes;
u64 tx_pdus;
u64 tx_bytes;
};
/**
* 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
* @eh_wait: wait queue for the endpoint to shutdown
* @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_active_list: connection list for active offload endpoints
* @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
* @hba_shutdown_tmo: Timeout value to shutdown each connection
* @conn_teardown_tmo: Timeout value to tear down each connection
* @conn_ctx_destroy_tmo: Timeout value to destroy context of each connection
* @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
* @stat_lock: spin lock used by the statistic collector (32 bit)
* @stats: local iSCSI statistic collection place holder
*
* 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;
resource_size_t reg_base;
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 9000
struct Scsi_Host *shost;
u32 max_sqes;
u32 max_rqes;
u32 max_cqes;
u32 num_ccell;
int ofld_conns_active;
wait_queue_head_t eh_wait;
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_active_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 */
int hba_shutdown_tmo;
int conn_teardown_tmo;
int conn_ctx_destroy_tmo;
/*
* 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;
#ifdef CONFIG_32BIT
spinlock_t stat_lock;
#endif
struct bnx2i_stats_info bnx2i_stats;
struct iscsi_stats_info stats;
};
/*******************************************************************************
* 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[62]; /* Pad structure size to 64 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: virtual address of first entry in SQ
* @sq_last_qe: virtual 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: virtual address of first entry in CQ
* @cq_last_qe: virtual 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: virtual address of first entry in RQ
* @rq_last_qe: virtual 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_LOGOUT_SENT = 0x4000,
EP_STATE_LOGOUT_RESP_RCVD = 0x8000,
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,
EP_STATE_OFLD_FAILED_CID_BUSY = 0x80000000,
};
/**
* 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
* @cls_ep: associated iSCSI endpoint pointer
* @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
* @timestamp: tracks the start time when the ep begins to connect
* @num_active_cmds: tracks the number of outstanding commands for this ep
* @ec_shift: the amount of shift as part of the event coal calc
* @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 iscsi_endpoint *cls_ep;
struct cnic_sock *cm_sk;
u32 hba_age;
u32 state;
unsigned long timestamp;
atomic_t num_active_cmds;
u32 ec_shift;
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;
};
struct bnx2i_work {
struct list_head list;
struct iscsi_session *session;
struct bnx2i_conn *bnx2i_conn;
struct cqe cqe;
};
struct bnx2i_percpu_s {
struct task_struct *iothread;
struct list_head work_list;
spinlock_t p_work_lock;
};
/* 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 unsigned int event_coal_min;
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, struct cnic_dev *dev);
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 int bnx2i_get_stats(void *handle);
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_text(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,
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 int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba,
struct bnx2i_endpoint *ep);
extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn);
extern int 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 int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action);
extern int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep);
/* 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);
extern int bnx2i_percpu_io_thread(void *arg);
extern int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
struct bnx2i_conn *bnx2i_conn,
struct cqe *cqe);
#endif