drivers/scsi/bnx2i/bnx2i.h

   1 /* bnx2i.h: Broadcom NetXtreme II iSCSI driver.
   2  *
   3  * Copyright (c) 2006 - 2010 Broadcom Corporation
   4  * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
   5  * Copyright (c) 2007, 2008 Mike Christie
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation.
  10  *
  11  * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
  12  * Maintained by: Eddie Wai (eddie.wai@broadcom.com)
  13  */
  14
  15 #ifndef _BNX2I_H_
  16 #define _BNX2I_H_
  17
  18 #include <linux/module.h>
  19 #include <linux/moduleparam.h>
  20
  21 #include <linux/errno.h>
  22 #include <linux/pci.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/sched.h>
  26 #include <linux/in.h>
  27 #include <linux/kfifo.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/completion.h>
  30
  31 #include <scsi/scsi_cmnd.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_eh.h>
  34 #include <scsi/scsi_host.h>
  35 #include <scsi/scsi.h>
  36 #include <scsi/iscsi_proto.h>
  37 #include <scsi/libiscsi.h>
  38 #include <scsi/scsi_transport_iscsi.h>
  39
  40 #include "../../net/cnic_if.h"
  41 #include "57xx_iscsi_hsi.h"
  42 #include "57xx_iscsi_constants.h"
  43
  44 #define BNX2_ISCSI_DRIVER_NAME          "bnx2i"
  45
  46 #define BNX2I_MAX_ADAPTERS              8
  47
  48 #define ISCSI_MAX_CONNS_PER_HBA         128
  49 #define ISCSI_MAX_SESS_PER_HBA          ISCSI_MAX_CONNS_PER_HBA
  50 #define ISCSI_MAX_CMDS_PER_SESS         128
  51
  52 /* Total active commands across all connections supported by devices */
  53 #define ISCSI_MAX_CMDS_PER_HBA_5708     (28 * (ISCSI_MAX_CMDS_PER_SESS - 1))
  54 #define ISCSI_MAX_CMDS_PER_HBA_5709     (128 * (ISCSI_MAX_CMDS_PER_SESS - 1))
  55 #define ISCSI_MAX_CMDS_PER_HBA_57710    (256 * (ISCSI_MAX_CMDS_PER_SESS - 1))
  56
  57 #define ISCSI_MAX_BDS_PER_CMD           32
  58
  59 #define MAX_PAGES_PER_CTRL_STRUCT_POOL  8
  60 #define BNX2I_RESERVED_SLOW_PATH_CMD_SLOTS      4
  61
  62 #define BNX2I_5771X_DBELL_PAGE_SIZE     128
  63
  64 /* 5706/08 hardware has limit on maximum buffer size per BD it can handle */
  65 #define MAX_BD_LENGTH                   65535
  66 #define BD_SPLIT_SIZE                   32768
  67
  68 /* min, max & default values for SQ/RQ/CQ size, configurable via' modparam */
  69 #define BNX2I_SQ_WQES_MIN               16
  70 #define BNX2I_570X_SQ_WQES_MAX          128
  71 #define BNX2I_5770X_SQ_WQES_MAX         512
  72 #define BNX2I_570X_SQ_WQES_DEFAULT      128
  73 #define BNX2I_5770X_SQ_WQES_DEFAULT     128
  74
  75 #define BNX2I_570X_CQ_WQES_MAX          128
  76 #define BNX2I_5770X_CQ_WQES_MAX         512
  77
  78 #define BNX2I_RQ_WQES_MIN               16
  79 #define BNX2I_RQ_WQES_MAX               32
  80 #define BNX2I_RQ_WQES_DEFAULT           16
  81
  82 /* CCELLs per conn */
  83 #define BNX2I_CCELLS_MIN                16
  84 #define BNX2I_CCELLS_MAX                96
  85 #define BNX2I_CCELLS_DEFAULT            64
  86
  87 #define ITT_INVALID_SIGNATURE           0xFFFF
  88
  89 #define ISCSI_CMD_CLEANUP_TIMEOUT       100
  90
  91 #define BNX2I_CONN_CTX_BUF_SIZE         16384
  92
  93 #define BNX2I_SQ_WQE_SIZE               64
  94 #define BNX2I_RQ_WQE_SIZE               256
  95 #define BNX2I_CQE_SIZE                  64
  96
  97 #define MB_KERNEL_CTX_SHIFT             8
  98 #define MB_KERNEL_CTX_SIZE              (1 << MB_KERNEL_CTX_SHIFT)
  99
 100 #define CTX_SHIFT                       7
 101 #define GET_CID_NUM(cid_addr)           ((cid_addr) >> CTX_SHIFT)
 102
 103 #define CTX_OFFSET                      0x10000
 104 #define MAX_CID_CNT                     0x4000
 105
 106 #define BNX2I_570X_PAGE_SIZE_DEFAULT    4096
 107
 108 /* 5709 context registers */
 109 #define BNX2_MQ_CONFIG2                 0x00003d00
 110 #define BNX2_MQ_CONFIG2_CONT_SZ         (0x7L<<4)
 111 #define BNX2_MQ_CONFIG2_FIRST_L4L5      (0x1fL<<8)
 112
 113 /* 57710's BAR2 is mapped to doorbell registers */
 114 #define BNX2X_DOORBELL_PCI_BAR          2
 115 #define BNX2X_MAX_CQS                   8
 116
 117 #define CNIC_ARM_CQE                    1
 118 #define CNIC_ARM_CQE_FP                 2
 119 #define CNIC_DISARM_CQE                 0
 120
 121 #define REG_RD(__hba, offset)                           \
 122                 readl(__hba->regview + offset)
 123 #define REG_WR(__hba, offset, val)                      \
 124                 writel(val, __hba->regview + offset)
 125
 126
 127 /**
 128  * struct generic_pdu_resc - login pdu resource structure
 129  *
 130  * @req_buf:            driver buffer used to stage payload associated with
 131  *                      the login request
 132  * @req_dma_addr:       dma address for iscsi login request payload buffer
 133  * @req_buf_size:       actual login request payload length
 134  * @req_wr_ptr:         pointer into login request buffer when next data is
 135  *                      to be written
 136  * @resp_hdr:           iscsi header where iscsi login response header is to
 137  *                      be recreated
 138  * @resp_buf:           buffer to stage login response payload
 139  * @resp_dma_addr:      login response payload buffer dma address
 140  * @resp_buf_size:      login response paylod length
 141  * @resp_wr_ptr:        pointer into login response buffer when next data is
 142  *                      to be written
 143  * @req_bd_tbl:         iscsi login request payload BD table
 144  * @req_bd_dma:         login request BD table dma address
 145  * @resp_bd_tbl:        iscsi login response payload BD table
 146  * @resp_bd_dma:        login request BD table dma address
 147  *
 148  * following structure defines buffer info for generic pdus such as iSCSI Login,
 149  *      Logout and NOP
 150  */
 151 struct generic_pdu_resc {
 152         char *req_buf;
 153         dma_addr_t req_dma_addr;
 154         u32 req_buf_size;
 155         char *req_wr_ptr;
 156         struct iscsi_hdr resp_hdr;
 157         char *resp_buf;
 158         dma_addr_t resp_dma_addr;
 159         u32 resp_buf_size;
 160         char *resp_wr_ptr;
 161         char *req_bd_tbl;
 162         dma_addr_t req_bd_dma;
 163         char *resp_bd_tbl;
 164         dma_addr_t resp_bd_dma;
 165 };
 166
 167
 168 /**
 169  * struct bd_resc_page - tracks DMA'able memory allocated for BD tables
 170  *
 171  * @link:               list head to link elements
 172  * @max_ptrs:           maximun pointers that can be stored in this page
 173  * @num_valid:          number of pointer valid in this page
 174  * @page:               base addess for page pointer array
 175  *
 176  * structure to track DMA'able memory allocated for command BD tables
 177  */
 178 struct bd_resc_page {
 179         struct list_head link;
 180         u32 max_ptrs;
 181         u32 num_valid;
 182         void *page[1];
 183 };
 184
 185
 186 /**
 187  * struct io_bdt - I/O buffer destricptor table
 188  *
 189  * @bd_tbl:             BD table's virtual address
 190  * @bd_tbl_dma:         BD table's dma address
 191  * @bd_valid:           num valid BD entries
 192  *
 193  * IO BD table
 194  */
 195 struct io_bdt {
 196         struct iscsi_bd *bd_tbl;
 197         dma_addr_t bd_tbl_dma;
 198         u16 bd_valid;
 199 };
 200
 201
 202 /**
 203  * bnx2i_cmd - iscsi command structure
 204  *
 205  * @scsi_cmd:           SCSI-ML task pointer corresponding to this iscsi cmd
 206  * @sg:                 SG list
 207  * @io_tbl:             buffer descriptor (BD) table
 208  * @bd_tbl_dma:         buffer descriptor (BD) table's dma address
 209  */
 210 struct bnx2i_cmd {
 211         struct iscsi_hdr hdr;
 212         struct bnx2i_conn *conn;
 213         struct scsi_cmnd *scsi_cmd;
 214         struct scatterlist *sg;
 215         struct io_bdt io_tbl;
 216         dma_addr_t bd_tbl_dma;
 217         struct bnx2i_cmd_request req;
 218 };
 219
 220
 221 /**
 222  * struct bnx2i_conn - iscsi connection structure
 223  *
 224  * @cls_conn:              pointer to iscsi cls conn
 225  * @hba:                   adapter structure pointer
 226  * @iscsi_conn_cid:        iscsi conn id
 227  * @fw_cid:                firmware iscsi context id
 228  * @ep:                    endpoint structure pointer
 229  * @gen_pdu:               login/nopout/logout pdu resources
 230  * @violation_notified:    bit mask used to track iscsi error/warning messages
 231  *                         already printed out
 232  *
 233  * iSCSI connection structure
 234  */
 235 struct bnx2i_conn {
 236         struct iscsi_cls_conn *cls_conn;
 237         struct bnx2i_hba *hba;
 238         struct completion cmd_cleanup_cmpl;
 239
 240         u32 iscsi_conn_cid;
 241 #define BNX2I_CID_RESERVED      0x5AFF
 242         u32 fw_cid;
 243
 244         struct timer_list poll_timer;
 245         /*
 246          * Queue Pair (QP) related structure elements.
 247          */
 248         struct bnx2i_endpoint *ep;
 249
 250         /*
 251          * Buffer for login negotiation process
 252          */
 253         struct generic_pdu_resc gen_pdu;
 254         u64 violation_notified;
 255 };
 256
 257
 258
 259 /**
 260  * struct iscsi_cid_queue - Per adapter iscsi cid queue
 261  *
 262  * @cid_que_base:           queue base memory
 263  * @cid_que:                queue memory pointer
 264  * @cid_q_prod_idx:         produce index
 265  * @cid_q_cons_idx:         consumer index
 266  * @cid_q_max_idx:          max index. used to detect wrap around condition
 267  * @cid_free_cnt:           queue size
 268  * @conn_cid_tbl:           iscsi cid to conn structure mapping table
 269  *
 270  * Per adapter iSCSI CID Queue
 271  */
 272 struct iscsi_cid_queue {
 273         void *cid_que_base;
 274         u32 *cid_que;
 275         u32 cid_q_prod_idx;
 276         u32 cid_q_cons_idx;
 277         u32 cid_q_max_idx;
 278         u32 cid_free_cnt;
 279         struct bnx2i_conn **conn_cid_tbl;
 280 };
 281
 282 /**
 283  * struct bnx2i_hba - bnx2i adapter structure
 284  *
 285  * @link:                  list head to link elements
 286  * @cnic:                  pointer to cnic device
 287  * @pcidev:                pointer to pci dev
 288  * @netdev:                pointer to netdev structure
 289  * @regview:               mapped PCI register space
 290  * @age:                   age, incremented by every recovery
 291  * @cnic_dev_type:         cnic device type, 5706/5708/5709/57710
 292  * @mail_queue_access:     mailbox queue access mode, applicable to 5709 only
 293  * @reg_with_cnic:         indicates whether the device is register with CNIC
 294  * @adapter_state:         adapter state, UP, GOING_DOWN, LINK_DOWN
 295  * @mtu_supported:         Ethernet MTU supported
 296  * @shost:                 scsi host pointer
 297  * @max_sqes:              SQ size
 298  * @max_rqes:              RQ size
 299  * @max_cqes:              CQ size
 300  * @num_ccell:             number of command cells per connection
 301  * @ofld_conns_active:     active connection list
 302  * @eh_wait:               wait queue for the endpoint to shutdown
 303  * @max_active_conns:      max offload connections supported by this device
 304  * @cid_que:               iscsi cid queue
 305  * @ep_rdwr_lock:          read / write lock to synchronize various ep lists
 306  * @ep_ofld_list:          connection list for pending offload completion
 307  * @ep_active_list:        connection list for active offload endpoints
 308  * @ep_destroy_list:       connection list for pending offload completion
 309  * @mp_bd_tbl:             BD table to be used with middle path requests
 310  * @mp_bd_dma:             DMA address of 'mp_bd_tbl' memory buffer
 311  * @dummy_buffer:          Dummy buffer to be used with zero length scsicmd reqs
 312  * @dummy_buf_dma:         DMA address of 'dummy_buffer' memory buffer
 313  * @lock:                  lock to synchonize access to hba structure
 314  * @hba_shutdown_tmo:      Timeout value to shutdown each connection
 315  * @conn_teardown_tmo:     Timeout value to tear down each connection
 316  * @conn_ctx_destroy_tmo:  Timeout value to destroy context of each connection
 317  * @pci_did:               PCI device ID
 318  * @pci_vid:               PCI vendor ID
 319  * @pci_sdid:              PCI subsystem device ID
 320  * @pci_svid:              PCI subsystem vendor ID
 321  * @pci_func:              PCI function number in system pci tree
 322  * @pci_devno:             PCI device number in system pci tree
 323  * @num_wqe_sent:          statistic counter, total wqe's sent
 324  * @num_cqe_rcvd:          statistic counter, total cqe's received
 325  * @num_intr_claimed:      statistic counter, total interrupts claimed
 326  * @link_changed_count:    statistic counter, num of link change notifications
 327  *                         received
 328  * @ipaddr_changed_count:  statistic counter, num times IP address changed while
 329  *                         at least one connection is offloaded
 330  * @num_sess_opened:       statistic counter, total num sessions opened
 331  * @num_conn_opened:       statistic counter, total num conns opened on this hba
 332  * @ctx_ccell_tasks:       captures number of ccells and tasks supported by
 333  *                         currently offloaded connection, used to decode
 334  *                         context memory
 335  *
 336  * Adapter Data Structure
 337  */
 338 struct bnx2i_hba {
 339         struct list_head link;
 340         struct cnic_dev *cnic;
 341         struct pci_dev *pcidev;
 342         struct net_device *netdev;
 343         void __iomem *regview;
 344
 345         u32 age;
 346         unsigned long cnic_dev_type;
 347                 #define BNX2I_NX2_DEV_5706              0x0
 348                 #define BNX2I_NX2_DEV_5708              0x1
 349                 #define BNX2I_NX2_DEV_5709              0x2
 350                 #define BNX2I_NX2_DEV_57710             0x3
 351         u32 mail_queue_access;
 352                 #define BNX2I_MQ_KERNEL_MODE            0x0
 353                 #define BNX2I_MQ_KERNEL_BYPASS_MODE     0x1
 354                 #define BNX2I_MQ_BIN_MODE               0x2
 355         unsigned long  reg_with_cnic;
 356                 #define BNX2I_CNIC_REGISTERED           1
 357
 358         unsigned long  adapter_state;
 359                 #define ADAPTER_STATE_UP                0
 360                 #define ADAPTER_STATE_GOING_DOWN        1
 361                 #define ADAPTER_STATE_LINK_DOWN         2
 362                 #define ADAPTER_STATE_INIT_FAILED       31
 363         unsigned int mtu_supported;
 364                 #define BNX2I_MAX_MTU_SUPPORTED         9000
 365
 366         struct Scsi_Host *shost;
 367
 368         u32 max_sqes;
 369         u32 max_rqes;
 370         u32 max_cqes;
 371         u32 num_ccell;
 372
 373         int ofld_conns_active;
 374         wait_queue_head_t eh_wait;
 375
 376         int max_active_conns;
 377         struct iscsi_cid_queue cid_que;
 378
 379         rwlock_t ep_rdwr_lock;
 380         struct list_head ep_ofld_list;
 381         struct list_head ep_active_list;
 382         struct list_head ep_destroy_list;
 383
 384         /*
 385          * BD table to be used with MP (Middle Path requests.
 386          */
 387         char *mp_bd_tbl;
 388         dma_addr_t mp_bd_dma;
 389         char *dummy_buffer;
 390         dma_addr_t dummy_buf_dma;
 391
 392         spinlock_t lock;        /* protects hba structure access */
 393         struct mutex net_dev_lock;/* sync net device access */
 394
 395         int hba_shutdown_tmo;
 396         int conn_teardown_tmo;
 397         int conn_ctx_destroy_tmo;
 398         /*
 399          * PCI related info.
 400          */
 401         u16 pci_did;
 402         u16 pci_vid;
 403         u16 pci_sdid;
 404         u16 pci_svid;
 405         u16 pci_func;
 406         u16 pci_devno;
 407
 408         /*
 409          * Following are a bunch of statistics useful during development
 410          * and later stage for score boarding.
 411          */
 412         u32 num_wqe_sent;
 413         u32 num_cqe_rcvd;
 414         u32 num_intr_claimed;
 415         u32 link_changed_count;
 416         u32 ipaddr_changed_count;
 417         u32 num_sess_opened;
 418         u32 num_conn_opened;
 419         unsigned int ctx_ccell_tasks;
 420 };
 421
 422
 423 /*******************************************************************************
 424  *      QP [ SQ / RQ / CQ ] info.
 425  ******************************************************************************/
 426
 427 /*
 428  * SQ/RQ/CQ generic structure definition
 429  */
 430 struct  sqe {
 431         u8 sqe_byte[BNX2I_SQ_WQE_SIZE];
 432 };
 433
 434 struct  rqe {
 435         u8 rqe_byte[BNX2I_RQ_WQE_SIZE];
 436 };
 437
 438 struct  cqe {
 439         u8 cqe_byte[BNX2I_CQE_SIZE];
 440 };
 441
 442
 443 enum {
 444 #if defined(__LITTLE_ENDIAN)
 445         CNIC_EVENT_COAL_INDEX   = 0x0,
 446         CNIC_SEND_DOORBELL      = 0x4,
 447         CNIC_EVENT_CQ_ARM       = 0x7,
 448         CNIC_RECV_DOORBELL      = 0x8
 449 #elif defined(__BIG_ENDIAN)
 450         CNIC_EVENT_COAL_INDEX   = 0x2,
 451         CNIC_SEND_DOORBELL      = 0x6,
 452         CNIC_EVENT_CQ_ARM       = 0x4,
 453         CNIC_RECV_DOORBELL      = 0xa
 454 #endif
 455 };
 456
 457
 458 /*
 459  * CQ DB
 460  */
 461 struct bnx2x_iscsi_cq_pend_cmpl {
 462         /* CQ producer, updated by Ustorm */
 463         u16 ustrom_prod;
 464         /* CQ pending completion counter */
 465         u16 pend_cntr;
 466 };
 467
 468
 469 struct bnx2i_5771x_cq_db {
 470         struct bnx2x_iscsi_cq_pend_cmpl qp_pend_cmpl[BNX2X_MAX_CQS];
 471         /* CQ pending completion ITT array */
 472         u16 itt[BNX2X_MAX_CQS];
 473         /* Cstorm CQ sequence to notify array, updated by driver */;
 474         u16 sqn[BNX2X_MAX_CQS];
 475         u32 reserved[4] /* 16 byte allignment */;
 476 };
 477
 478
 479 struct bnx2i_5771x_sq_rq_db {
 480         u16 prod_idx;
 481         u8 reserved0[14]; /* Pad structure size to 16 bytes */
 482 };
 483
 484
 485 struct bnx2i_5771x_dbell_hdr {
 486         u8 header;
 487         /* 1 for rx doorbell, 0 for tx doorbell */
 488 #define B577XX_DOORBELL_HDR_RX                          (0x1<<0)
 489 #define B577XX_DOORBELL_HDR_RX_SHIFT                    0
 490         /* 0 for normal doorbell, 1 for advertise wnd doorbell */
 491 #define B577XX_DOORBELL_HDR_DB_TYPE                     (0x1<<1)
 492 #define B577XX_DOORBELL_HDR_DB_TYPE_SHIFT               1
 493         /* rdma tx only: DPM transaction size specifier (64/128/256/512B) */
 494 #define B577XX_DOORBELL_HDR_DPM_SIZE                    (0x3<<2)
 495 #define B577XX_DOORBELL_HDR_DPM_SIZE_SHIFT              2
 496         /* connection type */
 497 #define B577XX_DOORBELL_HDR_CONN_TYPE                   (0xF<<4)
 498 #define B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT             4
 499 };
 500
 501 struct bnx2i_5771x_dbell {
 502         struct bnx2i_5771x_dbell_hdr dbell;
 503         u8 pad[3];
 504
 505 };
 506
 507 /**
 508  * struct qp_info - QP (share queue region) atrributes structure
 509  *
 510  * @ctx_base:           ioremapped pci register base to access doorbell register
 511  *                      pertaining to this offloaded connection
 512  * @sq_virt:            virtual address of send queue (SQ) region
 513  * @sq_phys:            DMA address of SQ memory region
 514  * @sq_mem_size:        SQ size
 515  * @sq_prod_qe:         SQ producer entry pointer
 516  * @sq_cons_qe:         SQ consumer entry pointer
 517  * @sq_first_qe:        virtaul address of first entry in SQ
 518  * @sq_last_qe:         virtaul address of last entry in SQ
 519  * @sq_prod_idx:        SQ producer index
 520  * @sq_cons_idx:        SQ consumer index
 521  * @sqe_left:           number sq entry left
 522  * @sq_pgtbl_virt:      page table describing buffer consituting SQ region
 523  * @sq_pgtbl_phys:      dma address of 'sq_pgtbl_virt'
 524  * @sq_pgtbl_size:      SQ page table size
 525  * @cq_virt:            virtual address of completion queue (CQ) region
 526  * @cq_phys:            DMA address of RQ memory region
 527  * @cq_mem_size:        CQ size
 528  * @cq_prod_qe:         CQ producer entry pointer
 529  * @cq_cons_qe:         CQ consumer entry pointer
 530  * @cq_first_qe:        virtaul address of first entry in CQ
 531  * @cq_last_qe:         virtaul address of last entry in CQ
 532  * @cq_prod_idx:        CQ producer index
 533  * @cq_cons_idx:        CQ consumer index
 534  * @cqe_left:           number cq entry left
 535  * @cqe_size:           size of each CQ entry
 536  * @cqe_exp_seq_sn:     next expected CQE sequence number
 537  * @cq_pgtbl_virt:      page table describing buffer consituting CQ region
 538  * @cq_pgtbl_phys:      dma address of 'cq_pgtbl_virt'
 539  * @cq_pgtbl_size:      CQ page table size
 540  * @rq_virt:            virtual address of receive queue (RQ) region
 541  * @rq_phys:            DMA address of RQ memory region
 542  * @rq_mem_size:        RQ size
 543  * @rq_prod_qe:         RQ producer entry pointer
 544  * @rq_cons_qe:         RQ consumer entry pointer
 545  * @rq_first_qe:        virtaul address of first entry in RQ
 546  * @rq_last_qe:         virtaul address of last entry in RQ
 547  * @rq_prod_idx:        RQ producer index
 548  * @rq_cons_idx:        RQ consumer index
 549  * @rqe_left:           number rq entry left
 550  * @rq_pgtbl_virt:      page table describing buffer consituting RQ region
 551  * @rq_pgtbl_phys:      dma address of 'rq_pgtbl_virt'
 552  * @rq_pgtbl_size:      RQ page table size
 553  *
 554  * queue pair (QP) is a per connection shared data structure which is used
 555  *      to send work requests (SQ), receive completion notifications (CQ)
 556  *      and receive asynchoronous / scsi sense info (RQ). 'qp_info' structure
 557  *      below holds queue memory, consumer/producer indexes and page table
 558  *      information
 559  */
 560 struct qp_info {
 561         void __iomem *ctx_base;
 562 #define DPM_TRIGER_TYPE                 0x40
 563
 564 #define BNX2I_570x_QUE_DB_SIZE          0
 565 #define BNX2I_5771x_QUE_DB_SIZE         16
 566         struct sqe *sq_virt;
 567         dma_addr_t sq_phys;
 568         u32 sq_mem_size;
 569
 570         struct sqe *sq_prod_qe;
 571         struct sqe *sq_cons_qe;
 572         struct sqe *sq_first_qe;
 573         struct sqe *sq_last_qe;
 574         u16 sq_prod_idx;
 575         u16 sq_cons_idx;
 576         u32 sqe_left;
 577
 578         void *sq_pgtbl_virt;
 579         dma_addr_t sq_pgtbl_phys;
 580         u32 sq_pgtbl_size;      /* set to PAGE_SIZE for 5708 & 5709 */
 581
 582         struct cqe *cq_virt;
 583         dma_addr_t cq_phys;
 584         u32 cq_mem_size;
 585
 586         struct cqe *cq_prod_qe;
 587         struct cqe *cq_cons_qe;
 588         struct cqe *cq_first_qe;
 589         struct cqe *cq_last_qe;
 590         u16 cq_prod_idx;
 591         u16 cq_cons_idx;
 592         u32 cqe_left;
 593         u32 cqe_size;
 594         u32 cqe_exp_seq_sn;
 595
 596         void *cq_pgtbl_virt;
 597         dma_addr_t cq_pgtbl_phys;
 598         u32 cq_pgtbl_size;      /* set to PAGE_SIZE for 5708 & 5709 */
 599
 600         struct rqe *rq_virt;
 601         dma_addr_t rq_phys;
 602         u32 rq_mem_size;
 603
 604         struct rqe *rq_prod_qe;
 605         struct rqe *rq_cons_qe;
 606         struct rqe *rq_first_qe;
 607         struct rqe *rq_last_qe;
 608         u16 rq_prod_idx;
 609         u16 rq_cons_idx;
 610         u32 rqe_left;
 611
 612         void *rq_pgtbl_virt;
 613         dma_addr_t rq_pgtbl_phys;
 614         u32 rq_pgtbl_size;      /* set to PAGE_SIZE for 5708 & 5709 */
 615 };
 616
 617
 618
 619 /*
 620  * CID handles
 621  */
 622 struct ep_handles {
 623         u32 fw_cid;
 624         u32 drv_iscsi_cid;
 625         u16 pg_cid;
 626         u16 rsvd;
 627 };
 628
 629
 630 enum {
 631         EP_STATE_IDLE                   = 0x0,
 632         EP_STATE_PG_OFLD_START          = 0x1,
 633         EP_STATE_PG_OFLD_COMPL          = 0x2,
 634         EP_STATE_OFLD_START             = 0x4,
 635         EP_STATE_OFLD_COMPL             = 0x8,
 636         EP_STATE_CONNECT_START          = 0x10,
 637         EP_STATE_CONNECT_COMPL          = 0x20,
 638         EP_STATE_ULP_UPDATE_START       = 0x40,
 639         EP_STATE_ULP_UPDATE_COMPL       = 0x80,
 640         EP_STATE_DISCONN_START          = 0x100,
 641         EP_STATE_DISCONN_COMPL          = 0x200,
 642         EP_STATE_CLEANUP_START          = 0x400,
 643         EP_STATE_CLEANUP_CMPL           = 0x800,
 644         EP_STATE_TCP_FIN_RCVD           = 0x1000,
 645         EP_STATE_TCP_RST_RCVD           = 0x2000,
 646         EP_STATE_LOGOUT_SENT            = 0x4000,
 647         EP_STATE_LOGOUT_RESP_RCVD       = 0x8000,
 648         EP_STATE_PG_OFLD_FAILED         = 0x1000000,
 649         EP_STATE_ULP_UPDATE_FAILED      = 0x2000000,
 650         EP_STATE_CLEANUP_FAILED         = 0x4000000,
 651         EP_STATE_OFLD_FAILED            = 0x8000000,
 652         EP_STATE_CONNECT_FAILED         = 0x10000000,
 653         EP_STATE_DISCONN_TIMEDOUT       = 0x20000000,
 654         EP_STATE_OFLD_FAILED_CID_BUSY   = 0x80000000,
 655 };
 656
 657 /**
 658  * struct bnx2i_endpoint - representation of tcp connection in NX2 world
 659  *
 660  * @link:               list head to link elements
 661  * @hba:                adapter to which this connection belongs
 662  * @conn:               iscsi connection this EP is linked to
 663  * @cls_ep:             associated iSCSI endpoint pointer
 664  * @sess:               iscsi session this EP is linked to
 665  * @cm_sk:              cnic sock struct
 666  * @hba_age:            age to detect if 'iscsid' issues ep_disconnect()
 667  *                      after HBA reset is completed by bnx2i/cnic/bnx2
 668  *                      modules
 669  * @state:              tracks offload connection state machine
 670  * @timestamp:          tracks the start time when the ep begins to connect
 671  * @num_active_cmds:    tracks the number of outstanding commands for this ep
 672  * @ec_shift:           the amount of shift as part of the event coal calc
 673  * @qp:                 QP information
 674  * @ids:                contains chip allocated *context id* & driver assigned
 675  *                      *iscsi cid*
 676  * @ofld_timer:         offload timer to detect timeout
 677  * @ofld_wait:          wait queue
 678  *
 679  * Endpoint Structure - equivalent of tcp socket structure
 680  */
 681 struct bnx2i_endpoint {
 682         struct list_head link;
 683         struct bnx2i_hba *hba;
 684         struct bnx2i_conn *conn;
 685         struct iscsi_endpoint *cls_ep;
 686         struct cnic_sock *cm_sk;
 687         u32 hba_age;
 688         u32 state;
 689         unsigned long timestamp;
 690         int num_active_cmds;
 691         u32 ec_shift;
 692
 693         struct qp_info qp;
 694         struct ep_handles ids;
 695                 #define ep_iscsi_cid    ids.drv_iscsi_cid
 696                 #define ep_cid          ids.fw_cid
 697                 #define ep_pg_cid       ids.pg_cid
 698         struct timer_list ofld_timer;
 699         wait_queue_head_t ofld_wait;
 700 };
 701
 702
 703
 704 /* Global variables */
 705 extern unsigned int error_mask1, error_mask2;
 706 extern u64 iscsi_error_mask;
 707 extern unsigned int en_tcp_dack;
 708 extern unsigned int event_coal_div;
 709 extern unsigned int event_coal_min;
 710
 711 extern struct scsi_transport_template *bnx2i_scsi_xport_template;
 712 extern struct iscsi_transport bnx2i_iscsi_transport;
 713 extern struct cnic_ulp_ops bnx2i_cnic_cb;
 714
 715 extern unsigned int sq_size;
 716 extern unsigned int rq_size;
 717
 718 extern struct device_attribute *bnx2i_dev_attributes[];
 719
 720
 721
 722 /*
 723  * Function Prototypes
 724  */
 725 extern void bnx2i_identify_device(struct bnx2i_hba *hba);
 726
 727 extern void bnx2i_ulp_init(struct cnic_dev *dev);
 728 extern void bnx2i_ulp_exit(struct cnic_dev *dev);
 729 extern void bnx2i_start(void *handle);
 730 extern void bnx2i_stop(void *handle);
 731 extern struct bnx2i_hba *get_adapter_list_head(void);
 732
 733 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
 734                                           u16 iscsi_cid);
 735
 736 int bnx2i_alloc_ep_pool(void);
 737 void bnx2i_release_ep_pool(void);
 738 struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba);
 739 struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba);
 740
 741 struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic);
 742
 743 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic);
 744 void bnx2i_free_hba(struct bnx2i_hba *hba);
 745
 746 void bnx2i_get_rq_buf(struct bnx2i_conn *conn, char *ptr, int len);
 747 void bnx2i_put_rq_buf(struct bnx2i_conn *conn, int count);
 748
 749 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd);
 750
 751 void bnx2i_drop_session(struct iscsi_cls_session *session);
 752
 753 extern int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba);
 754 extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn,
 755                                   struct iscsi_task *mtask);
 756 extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn,
 757                                   struct iscsi_task *mtask);
 758 extern int bnx2i_send_iscsi_text(struct bnx2i_conn *conn,
 759                                  struct iscsi_task *mtask);
 760 extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn,
 761                                     struct bnx2i_cmd *cmnd);
 762 extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn,
 763                                    struct iscsi_task *mtask,
 764                                    char *datap, int data_len, int unsol);
 765 extern int bnx2i_send_iscsi_logout(struct bnx2i_conn *conn,
 766                                    struct iscsi_task *mtask);
 767 extern void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba,
 768                                        struct bnx2i_cmd *cmd);
 769 extern int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba,
 770                                     struct bnx2i_endpoint *ep);
 771 extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn);
 772 extern int bnx2i_send_conn_destroy(struct bnx2i_hba *hba,
 773                                    struct bnx2i_endpoint *ep);
 774
 775 extern int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba,
 776                                struct bnx2i_endpoint *ep);
 777 extern void bnx2i_free_qp_resc(struct bnx2i_hba *hba,
 778                                struct bnx2i_endpoint *ep);
 779 extern void bnx2i_ep_ofld_timer(unsigned long data);
 780 extern struct bnx2i_endpoint *bnx2i_find_ep_in_ofld_list(
 781                 struct bnx2i_hba *hba, u32 iscsi_cid);
 782 extern struct bnx2i_endpoint *bnx2i_find_ep_in_destroy_list(
 783                 struct bnx2i_hba *hba, u32 iscsi_cid);
 784
 785 extern int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep);
 786 extern void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action);
 787
 788 extern int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep);
 789
 790 /* Debug related function prototypes */
 791 extern void bnx2i_print_pend_cmd_queue(struct bnx2i_conn *conn);
 792 extern void bnx2i_print_active_cmd_queue(struct bnx2i_conn *conn);
 793 extern void bnx2i_print_xmit_pdu_queue(struct bnx2i_conn *conn);
 794 extern void bnx2i_print_recv_state(struct bnx2i_conn *conn);
 795
 796 #endif