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linux/drivers/scsi/bnx2i/bnx2i.h
Eddie Wai 9ae58e144d [SCSI] bnx2i: Optimized the iSCSI offload performance 
Modified the event coalescing code for iSCSI offload to combat both
corner cases and optimize performance as follows:

1. Added mechanism to loop back a second time to process any leftover
CQEs that was generated by the hardware during the time the driver is
busy processing previous CQEs in the bh.  This not only helps the
performance but also fixes the corner case when no more CQEs are being
generated in the pipeline; so those leftover CQEs will get a a chance
to be processed.

2. Added ARM_CQE_FP to distinguish between fast path arming versus
slow path arming.  This change will guarantee that the CQEs will
always get a chance to be re-armed during fast path completions.

3. Removed the inline event coalescing division for perf optimization.
Also fixed a division-by-zero error when the event_coal_div module
param was set to 0.

4. Changed the default SQ WQEs size from 256 to 128 to match chip
default.

5. Changed the cmd_per_lun from 32 to 24.

Signed-off-by: Eddie Wai <eddie.wai@broadcom.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
2011-05-24 12:41:10 -04:00

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/* bnx2i.h: Broadcom NetXtreme II iSCSI driver.
*
* Copyright (c) 2006 - 2010 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)
* Maintained by: Eddie Wai (eddie.wai@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
#define BNX2I_5771X_DBELL_PAGE_SIZE 128
/* 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)
/**
* 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;
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
* @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
*
* 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 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;
};
/*******************************************************************************
* 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_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
* @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
* @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;
int 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;
};
/* 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);
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 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 void 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);
#endif
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