drivers/scsi/bnx2i/bnx2i.h

   1 /* bnx2i.h: Broadcom NetXtreme II iSCSI driver.
   2  *
   3  * Copyright (c) 2006 - 2011 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/delay.h>
  26 #include <linux/sched.h>
  27 #include <linux/in.h>
  28 #include <linux/kfifo.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/completion.h>
  31 #include <linux/kthread.h>
  32 #include <linux/cpu.h>
  33
  34 #include <scsi/scsi_cmnd.h>
  35 #include <scsi/scsi_device.h>
  36 #include <scsi/scsi_eh.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi.h>
  39 #include <scsi/iscsi_proto.h>
  40 #include <scsi/libiscsi.h>
  41 #include <scsi/scsi_transport_iscsi.h>
  42
  43 #include "../../net/ethernet/broadcom/cnic_if.h"
  44 #include "57xx_iscsi_hsi.h"
  45 #include "57xx_iscsi_constants.h"
  46
  47 #define BNX2_ISCSI_DRIVER_NAME          "bnx2i"
  48
  49 #define BNX2I_MAX_ADAPTERS              8
  50
  51 #define ISCSI_MAX_CONNS_PER_HBA         128
  52 #define ISCSI_MAX_SESS_PER_HBA          ISCSI_MAX_CONNS_PER_HBA
  53 #define ISCSI_MAX_CMDS_PER_SESS         128
  54
  55 /* Total active commands across all connections supported by devices */
  56 #define ISCSI_MAX_CMDS_PER_HBA_5708     (28 * (ISCSI_MAX_CMDS_PER_SESS - 1))
  57 #define ISCSI_MAX_CMDS_PER_HBA_5709     (128 * (ISCSI_MAX_CMDS_PER_SESS - 1))
  58 #define ISCSI_MAX_CMDS_PER_HBA_57710    (256 * (ISCSI_MAX_CMDS_PER_SESS - 1))
  59
  60 #define ISCSI_MAX_BDS_PER_CMD           32
  61
  62 #define MAX_PAGES_PER_CTRL_STRUCT_POOL  8
  63 #define BNX2I_RESERVED_SLOW_PATH_CMD_SLOTS      4
  64
  65 #define BNX2I_5771X_DBELL_PAGE_SIZE     128
  66
  67 /* 5706/08 hardware has limit on maximum buffer size per BD it can handle */
  68 #define MAX_BD_LENGTH                   65535
  69 #define BD_SPLIT_SIZE                   32768
  70
  71 /* min, max & default values for SQ/RQ/CQ size, configurable via' modparam */
  72 #define BNX2I_SQ_WQES_MIN               16
  73 #define BNX2I_570X_SQ_WQES_MAX          128
  74 #define BNX2I_5770X_SQ_WQES_MAX         512
  75 #define BNX2I_570X_SQ_WQES_DEFAULT      128
  76 #define BNX2I_5770X_SQ_WQES_DEFAULT     128
  77
  78 #define BNX2I_570X_CQ_WQES_MAX          128
  79 #define BNX2I_5770X_CQ_WQES_MAX         512
  80
  81 #define BNX2I_RQ_WQES_MIN               16
  82 #define BNX2I_RQ_WQES_MAX               32
  83 #define BNX2I_RQ_WQES_DEFAULT           16
  84
  85 /* CCELLs per conn */
  86 #define BNX2I_CCELLS_MIN                16
  87 #define BNX2I_CCELLS_MAX                96
  88 #define BNX2I_CCELLS_DEFAULT            64
  89
  90 #define ITT_INVALID_SIGNATURE           0xFFFF
  91
  92 #define ISCSI_CMD_CLEANUP_TIMEOUT       100
  93
  94 #define BNX2I_CONN_CTX_BUF_SIZE         16384
  95
  96 #define BNX2I_SQ_WQE_SIZE               64
  97 #define BNX2I_RQ_WQE_SIZE               256
  98 #define BNX2I_CQE_SIZE                  64
  99
 100 #define MB_KERNEL_CTX_SHIFT             8
 101 #define MB_KERNEL_CTX_SIZE              (1 << MB_KERNEL_CTX_SHIFT)
 102
 103 #define CTX_SHIFT                       7
 104 #define GET_CID_NUM(cid_addr)           ((cid_addr) >> CTX_SHIFT)
 105
 106 #define CTX_OFFSET                      0x10000
 107 #define MAX_CID_CNT                     0x4000
 108
 109 #define BNX2I_570X_PAGE_SIZE_DEFAULT    4096
 110
 111 /* 5709 context registers */
 112 #define BNX2_MQ_CONFIG2                 0x00003d00
 113 #define BNX2_MQ_CONFIG2_CONT_SZ         (0x7L<<4)
 114 #define BNX2_MQ_CONFIG2_FIRST_L4L5      (0x1fL<<8)
 115
 116 /* 57710's BAR2 is mapped to doorbell registers */
 117 #define BNX2X_DOORBELL_PCI_BAR          2
 118 #define BNX2X_MAX_CQS                   8
 119
 120 #define CNIC_ARM_CQE                    1
 121 #define CNIC_ARM_CQE_FP                 2
 122 #define CNIC_DISARM_CQE                 0
 123
 124 #define REG_RD(__hba, offset)                           \
 125                 readl(__hba->regview + offset)
 126 #define REG_WR(__hba, offset, val)                      \
 127                 writel(val, __hba->regview + offset)
 128
 129
 130 /**
 131  * struct generic_pdu_resc - login pdu resource structure
 132  *
 133  * @req_buf:            driver buffer used to stage payload associated with
 134  *                      the login request
 135  * @req_dma_addr:       dma address for iscsi login request payload buffer
 136  * @req_buf_size:       actual login request payload length
 137  * @req_wr_ptr:         pointer into login request buffer when next data is
 138  *                      to be written
 139  * @resp_hdr:           iscsi header where iscsi login response header is to
 140  *                      be recreated
 141  * @resp_buf:           buffer to stage login response payload
 142  * @resp_dma_addr:      login response payload buffer dma address
 143  * @resp_buf_size:      login response paylod length
 144  * @resp_wr_ptr:        pointer into login response buffer when next data is
 145  *                      to be written
 146  * @req_bd_tbl:         iscsi login request payload BD table
 147  * @req_bd_dma:         login request BD table dma address
 148  * @resp_bd_tbl:        iscsi login response payload BD table
 149  * @resp_bd_dma:        login request BD table dma address
 150  *
 151  * following structure defines buffer info for generic pdus such as iSCSI Login,
 152  *      Logout and NOP
 153  */
 154 struct generic_pdu_resc {
 155         char *req_buf;
 156         dma_addr_t req_dma_addr;
 157         u32 req_buf_size;
 158         char *req_wr_ptr;
 159         struct iscsi_hdr resp_hdr;
 160         char *resp_buf;
 161         dma_addr_t resp_dma_addr;
 162         u32 resp_buf_size;
 163         char *resp_wr_ptr;
 164         char *req_bd_tbl;
 165         dma_addr_t req_bd_dma;
 166         char *resp_bd_tbl;
 167         dma_addr_t resp_bd_dma;
 168 };
 169
 170
 171 /**
 172  * struct bd_resc_page - tracks DMA'able memory allocated for BD tables
 173  *
 174  * @link:               list head to link elements
 175  * @max_ptrs:           maximun pointers that can be stored in this page
 176  * @num_valid:          number of pointer valid in this page
 177  * @page:               base addess for page pointer array
 178  *
 179  * structure to track DMA'able memory allocated for command BD tables
 180  */
 181 struct bd_resc_page {
 182         struct list_head link;
 183         u32 max_ptrs;
 184         u32 num_valid;
 185         void *page[1];
 186 };
 187
 188
 189 /**
 190  * struct io_bdt - I/O buffer destricptor table
 191  *
 192  * @bd_tbl:             BD table's virtual address
 193  * @bd_tbl_dma:         BD table's dma address
 194  * @bd_valid:           num valid BD entries
 195  *
 196  * IO BD table
 197  */
 198 struct io_bdt {
 199         struct iscsi_bd *bd_tbl;
 200         dma_addr_t bd_tbl_dma;
 201         u16 bd_valid;
 202 };
 203
 204
 205 /**
 206  * bnx2i_cmd - iscsi command structure
 207  *
 208  * @hdr:                iSCSI header
 209  * @conn:               iscsi_conn pointer
 210  * @scsi_cmd:           SCSI-ML task pointer corresponding to this iscsi cmd
 211  * @sg:                 SG list
 212  * @io_tbl:             buffer descriptor (BD) table
 213  * @bd_tbl_dma:         buffer descriptor (BD) table's dma address
 214  * @req:                bnx2i specific command request struct
 215  */
 216 struct bnx2i_cmd {
 217         struct iscsi_hdr hdr;
 218         struct bnx2i_conn *conn;
 219         struct scsi_cmnd *scsi_cmd;
 220         struct scatterlist *sg;
 221         struct io_bdt io_tbl;
 222         dma_addr_t bd_tbl_dma;
 223         struct bnx2i_cmd_request req;
 224 };
 225
 226
 227 /**
 228  * struct bnx2i_conn - iscsi connection structure
 229  *
 230  * @cls_conn:              pointer to iscsi cls conn
 231  * @hba:                   adapter structure pointer
 232  * @iscsi_conn_cid:        iscsi conn id
 233  * @fw_cid:                firmware iscsi context id
 234  * @ep:                    endpoint structure pointer
 235  * @gen_pdu:               login/nopout/logout pdu resources
 236  * @violation_notified:    bit mask used to track iscsi error/warning messages
 237  *                         already printed out
 238  * @work_cnt:              keeps track of the number of outstanding work
 239  *
 240  * iSCSI connection structure
 241  */
 242 struct bnx2i_conn {
 243         struct iscsi_cls_conn *cls_conn;
 244         struct bnx2i_hba *hba;
 245         struct completion cmd_cleanup_cmpl;
 246
 247         u32 iscsi_conn_cid;
 248 #define BNX2I_CID_RESERVED      0x5AFF
 249         u32 fw_cid;
 250
 251         struct timer_list poll_timer;
 252         /*
 253          * Queue Pair (QP) related structure elements.
 254          */
 255         struct bnx2i_endpoint *ep;
 256
 257         /*
 258          * Buffer for login negotiation process
 259          */
 260         struct generic_pdu_resc gen_pdu;
 261         u64 violation_notified;
 262
 263         atomic_t work_cnt;
 264 };
 265
 266
 267
 268 /**
 269  * struct iscsi_cid_queue - Per adapter iscsi cid queue
 270  *
 271  * @cid_que_base:           queue base memory
 272  * @cid_que:                queue memory pointer
 273  * @cid_q_prod_idx:         produce index
 274  * @cid_q_cons_idx:         consumer index
 275  * @cid_q_max_idx:          max index. used to detect wrap around condition
 276  * @cid_free_cnt:           queue size
 277  * @conn_cid_tbl:           iscsi cid to conn structure mapping table
 278  *
 279  * Per adapter iSCSI CID Queue
 280  */
 281 struct iscsi_cid_queue {
 282         void *cid_que_base;
 283         u32 *cid_que;
 284         u32 cid_q_prod_idx;
 285         u32 cid_q_cons_idx;
 286         u32 cid_q_max_idx;
 287         u32 cid_free_cnt;
 288         struct bnx2i_conn **conn_cid_tbl;
 289 };
 290
 291 /**
 292  * struct bnx2i_hba - bnx2i adapter structure
 293  *
 294  * @link:                  list head to link elements
 295  * @cnic:                  pointer to cnic device
 296  * @pcidev:                pointer to pci dev
 297  * @netdev:                pointer to netdev structure
 298  * @regview:               mapped PCI register space
 299  * @age:                   age, incremented by every recovery
 300  * @cnic_dev_type:         cnic device type, 5706/5708/5709/57710
 301  * @mail_queue_access:     mailbox queue access mode, applicable to 5709 only
 302  * @reg_with_cnic:         indicates whether the device is register with CNIC
 303  * @adapter_state:         adapter state, UP, GOING_DOWN, LINK_DOWN
 304  * @mtu_supported:         Ethernet MTU supported
 305  * @shost:                 scsi host pointer
 306  * @max_sqes:              SQ size
 307  * @max_rqes:              RQ size
 308  * @max_cqes:              CQ size
 309  * @num_ccell:             number of command cells per connection
 310  * @ofld_conns_active:     active connection list
 311  * @eh_wait:               wait queue for the endpoint to shutdown
 312  * @max_active_conns:      max offload connections supported by this device
 313  * @cid_que:               iscsi cid queue
 314  * @ep_rdwr_lock:          read / write lock to synchronize various ep lists
 315  * @ep_ofld_list:          connection list for pending offload completion
 316  * @ep_active_list:        connection list for active offload endpoints
 317  * @ep_destroy_list:       connection list for pending offload completion
 318  * @mp_bd_tbl:             BD table to be used with middle path requests
 319  * @mp_bd_dma:             DMA address of 'mp_bd_tbl' memory buffer
 320  * @dummy_buffer:          Dummy buffer to be used with zero length scsicmd reqs
 321  * @dummy_buf_dma:         DMA address of 'dummy_buffer' memory buffer
 322  * @lock:                  lock to synchonize access to hba structure
 323  * @hba_shutdown_tmo:      Timeout value to shutdown each connection
 324  * @conn_teardown_tmo:     Timeout value to tear down each connection
 325  * @conn_ctx_destroy_tmo:  Timeout value to destroy context of each connection
 326  * @pci_did:               PCI device ID
 327  * @pci_vid:               PCI vendor ID
 328  * @pci_sdid:              PCI subsystem device ID
 329  * @pci_svid:              PCI subsystem vendor ID
 330  * @pci_func:              PCI function number in system pci tree
 331  * @pci_devno:             PCI device number in system pci tree
 332  * @num_wqe_sent:          statistic counter, total wqe's sent
 333  * @num_cqe_rcvd:          statistic counter, total cqe's received
 334  * @num_intr_claimed:      statistic counter, total interrupts claimed
 335  * @link_changed_count:    statistic counter, num of link change notifications
 336  *                         received
 337  * @ipaddr_changed_count:  statistic counter, num times IP address changed while
 338  *                         at least one connection is offloaded
 339  * @num_sess_opened:       statistic counter, total num sessions opened
 340  * @num_conn_opened:       statistic counter, total num conns opened on this hba
 341  * @ctx_ccell_tasks:       captures number of ccells and tasks supported by
 342  *                         currently offloaded connection, used to decode
 343  *                         context memory
 344  *
 345  * Adapter Data Structure
 346  */
 347 struct bnx2i_hba {
 348         struct list_head link;
 349         struct cnic_dev *cnic;
 350         struct pci_dev *pcidev;
 351         struct net_device *netdev;
 352         void __iomem *regview;
 353
 354         u32 age;
 355         unsigned long cnic_dev_type;
 356                 #define BNX2I_NX2_DEV_5706              0x0
 357                 #define BNX2I_NX2_DEV_5708              0x1
 358                 #define BNX2I_NX2_DEV_5709              0x2
 359                 #define BNX2I_NX2_DEV_57710             0x3
 360         u32 mail_queue_access;
 361                 #define BNX2I_MQ_KERNEL_MODE            0x0
 362                 #define BNX2I_MQ_KERNEL_BYPASS_MODE     0x1
 363                 #define BNX2I_MQ_BIN_MODE               0x2
 364         unsigned long  reg_with_cnic;
 365                 #define BNX2I_CNIC_REGISTERED           1
 366
 367         unsigned long  adapter_state;
 368                 #define ADAPTER_STATE_UP                0
 369                 #define ADAPTER_STATE_GOING_DOWN        1
 370                 #define ADAPTER_STATE_LINK_DOWN         2
 371                 #define ADAPTER_STATE_INIT_FAILED       31
 372         unsigned int mtu_supported;
 373                 #define BNX2I_MAX_MTU_SUPPORTED         9000
 374
 375         struct Scsi_Host *shost;
 376
 377         u32 max_sqes;
 378         u32 max_rqes;
 379         u32 max_cqes;
 380         u32 num_ccell;
 381
 382         int ofld_conns_active;
 383         wait_queue_head_t eh_wait;
 384
 385         int max_active_conns;
 386         struct iscsi_cid_queue cid_que;
 387
 388         rwlock_t ep_rdwr_lock;
 389         struct list_head ep_ofld_list;
 390         struct list_head ep_active_list;
 391         struct list_head ep_destroy_list;
 392
 393         /*
 394          * BD table to be used with MP (Middle Path requests.
 395          */
 396         char *mp_bd_tbl;
 397         dma_addr_t mp_bd_dma;
 398         char *dummy_buffer;
 399         dma_addr_t dummy_buf_dma;
 400
 401         spinlock_t lock;        /* protects hba structure access */
 402         struct mutex net_dev_lock;/* sync net device access */
 403
 404         int hba_shutdown_tmo;
 405         int conn_teardown_tmo;
 406         int conn_ctx_destroy_tmo;
 407         /*
 408          * PCI related info.
 409          */
 410         u16 pci_did;
 411         u16 pci_vid;
 412         u16 pci_sdid;
 413         u16 pci_svid;
 414         u16 pci_func;
 415         u16 pci_devno;
 416
 417         /*
 418          * Following are a bunch of statistics useful during development
 419          * and later stage for score boarding.
 420          */
 421         u32 num_wqe_sent;
 422         u32 num_cqe_rcvd;
 423         u32 num_intr_claimed;
 424         u32 link_changed_count;
 425         u32 ipaddr_changed_count;
 426         u32 num_sess_opened;
 427         u32 num_conn_opened;
 428         unsigned int ctx_ccell_tasks;
 429 };
 430
 431
 432 /*******************************************************************************
 433  *      QP [ SQ / RQ / CQ ] info.
 434  ******************************************************************************/
 435
 436 /*
 437  * SQ/RQ/CQ generic structure definition
 438  */
 439 struct  sqe {
 440         u8 sqe_byte[BNX2I_SQ_WQE_SIZE];
 441 };
 442
 443 struct  rqe {
 444         u8 rqe_byte[BNX2I_RQ_WQE_SIZE];
 445 };
 446
 447 struct  cqe {
 448         u8 cqe_byte[BNX2I_CQE_SIZE];
 449 };
 450
 451
 452 enum {
 453 #if defined(__LITTLE_ENDIAN)
 454         CNIC_EVENT_COAL_INDEX   = 0x0,
 455         CNIC_SEND_DOORBELL      = 0x4,
 456         CNIC_EVENT_CQ_ARM       = 0x7,
 457         CNIC_RECV_DOORBELL      = 0x8
 458 #elif defined(__BIG_ENDIAN)
 459         CNIC_EVENT_COAL_INDEX   = 0x2,
 460         CNIC_SEND_DOORBELL      = 0x6,
 461         CNIC_EVENT_CQ_ARM       = 0x4,
 462         CNIC_RECV_DOORBELL      = 0xa
 463 #endif
 464 };
 465
 466
 467 /*
 468  * CQ DB
 469  */
 470 struct bnx2x_iscsi_cq_pend_cmpl {
 471         /* CQ producer, updated by Ustorm */
 472         u16 ustrom_prod;
 473         /* CQ pending completion counter */
 474         u16 pend_cntr;
 475 };
 476
 477
 478 struct bnx2i_5771x_cq_db {
 479         struct bnx2x_iscsi_cq_pend_cmpl qp_pend_cmpl[BNX2X_MAX_CQS];
 480         /* CQ pending completion ITT array */
 481         u16 itt[BNX2X_MAX_CQS];
 482         /* Cstorm CQ sequence to notify array, updated by driver */;
 483         u16 sqn[BNX2X_MAX_CQS];
 484         u32 reserved[4] /* 16 byte allignment */;
 485 };
 486
 487
 488 struct bnx2i_5771x_sq_rq_db {
 489         u16 prod_idx;
 490         u8 reserved0[62]; /* Pad structure size to 64 bytes */
 491 };
 492
 493
 494 struct bnx2i_5771x_dbell_hdr {
 495         u8 header;
 496         /* 1 for rx doorbell, 0 for tx doorbell */
 497 #define B577XX_DOORBELL_HDR_RX                          (0x1<<0)
 498 #define B577XX_DOORBELL_HDR_RX_SHIFT                    0
 499         /* 0 for normal doorbell, 1 for advertise wnd doorbell */
 500 #define B577XX_DOORBELL_HDR_DB_TYPE                     (0x1<<1)
 501 #define B577XX_DOORBELL_HDR_DB_TYPE_SHIFT               1
 502         /* rdma tx only: DPM transaction size specifier (64/128/256/512B) */
 503 #define B577XX_DOORBELL_HDR_DPM_SIZE                    (0x3<<2)
 504 #define B577XX_DOORBELL_HDR_DPM_SIZE_SHIFT              2
 505         /* connection type */
 506 #define B577XX_DOORBELL_HDR_CONN_TYPE                   (0xF<<4)
 507 #define B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT             4
 508 };
 509
 510 struct bnx2i_5771x_dbell {
 511         struct bnx2i_5771x_dbell_hdr dbell;
 512         u8 pad[3];
 513
 514 };
 515
 516 /**
 517  * struct qp_info - QP (share queue region) atrributes structure
 518  *
 519  * @ctx_base:           ioremapped pci register base to access doorbell register
 520  *                      pertaining to this offloaded connection
 521  * @sq_virt:            virtual address of send queue (SQ) region
 522  * @sq_phys:            DMA address of SQ memory region
 523  * @sq_mem_size:        SQ size
 524  * @sq_prod_qe:         SQ producer entry pointer
 525  * @sq_cons_qe:         SQ consumer entry pointer
 526  * @sq_first_qe:        virtaul address of first entry in SQ
 527  * @sq_last_qe:         virtaul address of last entry in SQ
 528  * @sq_prod_idx:        SQ producer index
 529  * @sq_cons_idx:        SQ consumer index
 530  * @sqe_left:           number sq entry left
 531  * @sq_pgtbl_virt:      page table describing buffer consituting SQ region
 532  * @sq_pgtbl_phys:      dma address of 'sq_pgtbl_virt'
 533  * @sq_pgtbl_size:      SQ page table size
 534  * @cq_virt:            virtual address of completion queue (CQ) region
 535  * @cq_phys:            DMA address of RQ memory region
 536  * @cq_mem_size:        CQ size
 537  * @cq_prod_qe:         CQ producer entry pointer
 538  * @cq_cons_qe:         CQ consumer entry pointer
 539  * @cq_first_qe:        virtaul address of first entry in CQ
 540  * @cq_last_qe:         virtaul address of last entry in CQ
 541  * @cq_prod_idx:        CQ producer index
 542  * @cq_cons_idx:        CQ consumer index
 543  * @cqe_left:           number cq entry left
 544  * @cqe_size:           size of each CQ entry
 545  * @cqe_exp_seq_sn:     next expected CQE sequence number
 546  * @cq_pgtbl_virt:      page table describing buffer consituting CQ region
 547  * @cq_pgtbl_phys:      dma address of 'cq_pgtbl_virt'
 548  * @cq_pgtbl_size:      CQ page table size
 549  * @rq_virt:            virtual address of receive queue (RQ) region
 550  * @rq_phys:            DMA address of RQ memory region
 551  * @rq_mem_size:        RQ size
 552  * @rq_prod_qe:         RQ producer entry pointer
 553  * @rq_cons_qe:         RQ consumer entry pointer
 554  * @rq_first_qe:        virtaul address of first entry in RQ
 555  * @rq_last_qe:         virtaul address of last entry in RQ
 556  * @rq_prod_idx:        RQ producer index
 557  * @rq_cons_idx:        RQ consumer index
 558  * @rqe_left:           number rq entry left
 559  * @rq_pgtbl_virt:      page table describing buffer consituting RQ region
 560  * @rq_pgtbl_phys:      dma address of 'rq_pgtbl_virt'
 561  * @rq_pgtbl_size:      RQ page table size
 562  *
 563  * queue pair (QP) is a per connection shared data structure which is used
 564  *      to send work requests (SQ), receive completion notifications (CQ)
 565  *      and receive asynchoronous / scsi sense info (RQ). 'qp_info' structure
 566  *      below holds queue memory, consumer/producer indexes and page table
 567  *      information
 568  */
 569 struct qp_info {
 570         void __iomem *ctx_base;
 571 #define DPM_TRIGER_TYPE                 0x40
 572
 573 #define BNX2I_570x_QUE_DB_SIZE          0
 574 #define BNX2I_5771x_QUE_DB_SIZE         16
 575         struct sqe *sq_virt;
 576         dma_addr_t sq_phys;
 577         u32 sq_mem_size;
 578
 579         struct sqe *sq_prod_qe;
 580         struct sqe *sq_cons_qe;
 581         struct sqe *sq_first_qe;
 582         struct sqe *sq_last_qe;
 583         u16 sq_prod_idx;
 584         u16 sq_cons_idx;
 585         u32 sqe_left;
 586
 587         void *sq_pgtbl_virt;
 588         dma_addr_t sq_pgtbl_phys;
 589         u32 sq_pgtbl_size;      /* set to PAGE_SIZE for 5708 & 5709 */
 590
 591         struct cqe *cq_virt;
 592         dma_addr_t cq_phys;
 593         u32 cq_mem_size;
 594
 595         struct cqe *cq_prod_qe;
 596         struct cqe *cq_cons_qe;
 597         struct cqe *cq_first_qe;
 598         struct cqe *cq_last_qe;
 599         u16 cq_prod_idx;
 600         u16 cq_cons_idx;
 601         u32 cqe_left;
 602         u32 cqe_size;
 603         u32 cqe_exp_seq_sn;
 604
 605         void *cq_pgtbl_virt;
 606         dma_addr_t cq_pgtbl_phys;
 607         u32 cq_pgtbl_size;      /* set to PAGE_SIZE for 5708 & 5709 */
 608
 609         struct rqe *rq_virt;
 610         dma_addr_t rq_phys;
 611         u32 rq_mem_size;
 612
 613         struct rqe *rq_prod_qe;
 614         struct rqe *rq_cons_qe;
 615         struct rqe *rq_first_qe;
 616         struct rqe *rq_last_qe;
 617         u16 rq_prod_idx;
 618         u16 rq_cons_idx;
 619         u32 rqe_left;
 620
 621         void *rq_pgtbl_virt;
 622         dma_addr_t rq_pgtbl_phys;
 623         u32 rq_pgtbl_size;      /* set to PAGE_SIZE for 5708 & 5709 */
 624 };
 625
 626
 627
 628 /*
 629  * CID handles
 630  */
 631 struct ep_handles {
 632         u32 fw_cid;
 633         u32 drv_iscsi_cid;
 634         u16 pg_cid;
 635         u16 rsvd;
 636 };
 637
 638
 639 enum {
 640         EP_STATE_IDLE                   = 0x0,
 641         EP_STATE_PG_OFLD_START          = 0x1,
 642         EP_STATE_PG_OFLD_COMPL          = 0x2,
 643         EP_STATE_OFLD_START             = 0x4,
 644         EP_STATE_OFLD_COMPL             = 0x8,
 645         EP_STATE_CONNECT_START          = 0x10,
 646         EP_STATE_CONNECT_COMPL          = 0x20,
 647         EP_STATE_ULP_UPDATE_START       = 0x40,
 648         EP_STATE_ULP_UPDATE_COMPL       = 0x80,
 649         EP_STATE_DISCONN_START          = 0x100,
 650         EP_STATE_DISCONN_COMPL          = 0x200,
 651         EP_STATE_CLEANUP_START          = 0x400,
 652         EP_STATE_CLEANUP_CMPL           = 0x800,
 653         EP_STATE_TCP_FIN_RCVD           = 0x1000,
 654         EP_STATE_TCP_RST_RCVD           = 0x2000,
 655         EP_STATE_LOGOUT_SENT            = 0x4000,
 656         EP_STATE_LOGOUT_RESP_RCVD       = 0x8000,
 657         EP_STATE_PG_OFLD_FAILED         = 0x1000000,
 658         EP_STATE_ULP_UPDATE_FAILED      = 0x2000000,
 659         EP_STATE_CLEANUP_FAILED         = 0x4000000,
 660         EP_STATE_OFLD_FAILED            = 0x8000000,
 661         EP_STATE_CONNECT_FAILED         = 0x10000000,
 662         EP_STATE_DISCONN_TIMEDOUT       = 0x20000000,
 663         EP_STATE_OFLD_FAILED_CID_BUSY   = 0x80000000,
 664 };
 665
 666 /**
 667  * struct bnx2i_endpoint - representation of tcp connection in NX2 world
 668  *
 669  * @link:               list head to link elements
 670  * @hba:                adapter to which this connection belongs
 671  * @conn:               iscsi connection this EP is linked to
 672  * @cls_ep:             associated iSCSI endpoint pointer
 673  * @cm_sk:              cnic sock struct
 674  * @hba_age:            age to detect if 'iscsid' issues ep_disconnect()
 675  *                      after HBA reset is completed by bnx2i/cnic/bnx2
 676  *                      modules
 677  * @state:              tracks offload connection state machine
 678  * @timestamp:          tracks the start time when the ep begins to connect
 679  * @num_active_cmds:    tracks the number of outstanding commands for this ep
 680  * @ec_shift:           the amount of shift as part of the event coal calc
 681  * @qp:                 QP information
 682  * @ids:                contains chip allocated *context id* & driver assigned
 683  *                      *iscsi cid*
 684  * @ofld_timer:         offload timer to detect timeout
 685  * @ofld_wait:          wait queue
 686  *
 687  * Endpoint Structure - equivalent of tcp socket structure
 688  */
 689 struct bnx2i_endpoint {
 690         struct list_head link;
 691         struct bnx2i_hba *hba;
 692         struct bnx2i_conn *conn;
 693         struct iscsi_endpoint *cls_ep;
 694         struct cnic_sock *cm_sk;
 695         u32 hba_age;
 696         u32 state;
 697         unsigned long timestamp;
 698         atomic_t num_active_cmds;
 699         u32 ec_shift;
 700
 701         struct qp_info qp;
 702         struct ep_handles ids;
 703                 #define ep_iscsi_cid    ids.drv_iscsi_cid
 704                 #define ep_cid          ids.fw_cid
 705                 #define ep_pg_cid       ids.pg_cid
 706         struct timer_list ofld_timer;
 707         wait_queue_head_t ofld_wait;
 708 };
 709
 710
 711 struct bnx2i_work {
 712         struct list_head list;
 713         struct iscsi_session *session;
 714         struct bnx2i_conn *bnx2i_conn;
 715         struct cqe cqe;
 716 };
 717
 718 struct bnx2i_percpu_s {
 719         struct task_struct *iothread;
 720         struct list_head work_list;
 721         spinlock_t p_work_lock;
 722 };
 723
 724
 725 /* Global variables */
 726 extern unsigned int error_mask1, error_mask2;
 727 extern u64 iscsi_error_mask;
 728 extern unsigned int en_tcp_dack;
 729 extern unsigned int event_coal_div;
 730 extern unsigned int event_coal_min;
 731
 732 extern struct scsi_transport_template *bnx2i_scsi_xport_template;
 733 extern struct iscsi_transport bnx2i_iscsi_transport;
 734 extern struct cnic_ulp_ops bnx2i_cnic_cb;
 735
 736 extern unsigned int sq_size;
 737 extern unsigned int rq_size;
 738
 739 extern struct device_attribute *bnx2i_dev_attributes[];
 740
 741
 742
 743 /*
 744  * Function Prototypes
 745  */
 746 extern void bnx2i_identify_device(struct bnx2i_hba *hba);
 747
 748 extern void bnx2i_ulp_init(struct cnic_dev *dev);
 749 extern void bnx2i_ulp_exit(struct cnic_dev *dev);
 750 extern void bnx2i_start(void *handle);
 751 extern void bnx2i_stop(void *handle);
 752 extern struct bnx2i_hba *get_adapter_list_head(void);
 753
 754 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
 755                                           u16 iscsi_cid);
 756
 757 int bnx2i_alloc_ep_pool(void);
 758 void bnx2i_release_ep_pool(void);
 759 struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba);
 760 struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba);
 761
 762 struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic);
 763
 764 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic);
 765 void bnx2i_free_hba(struct bnx2i_hba *hba);
 766
 767 void bnx2i_get_rq_buf(struct bnx2i_conn *conn, char *ptr, int len);
 768 void bnx2i_put_rq_buf(struct bnx2i_conn *conn, int count);
 769
 770 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd);
 771
 772 void bnx2i_drop_session(struct iscsi_cls_session *session);
 773
 774 extern int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba);
 775 extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn,
 776                                   struct iscsi_task *mtask);
 777 extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn,
 778                                   struct iscsi_task *mtask);
 779 extern int bnx2i_send_iscsi_text(struct bnx2i_conn *conn,
 780                                  struct iscsi_task *mtask);
 781 extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn,
 782                                     struct bnx2i_cmd *cmnd);
 783 extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn,
 784                                    struct iscsi_task *mtask,
 785                                    char *datap, int data_len, int unsol);
 786 extern int bnx2i_send_iscsi_logout(struct bnx2i_conn *conn,
 787                                    struct iscsi_task *mtask);
 788 extern void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba,
 789                                        struct bnx2i_cmd *cmd);
 790 extern int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba,
 791                                     struct bnx2i_endpoint *ep);
 792 extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn);
 793 extern int bnx2i_send_conn_destroy(struct bnx2i_hba *hba,
 794                                    struct bnx2i_endpoint *ep);
 795
 796 extern int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba,
 797                                struct bnx2i_endpoint *ep);
 798 extern void bnx2i_free_qp_resc(struct bnx2i_hba *hba,
 799                                struct bnx2i_endpoint *ep);
 800 extern void bnx2i_ep_ofld_timer(unsigned long data);
 801 extern struct bnx2i_endpoint *bnx2i_find_ep_in_ofld_list(
 802                 struct bnx2i_hba *hba, u32 iscsi_cid);
 803 extern struct bnx2i_endpoint *bnx2i_find_ep_in_destroy_list(
 804                 struct bnx2i_hba *hba, u32 iscsi_cid);
 805
 806 extern int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep);
 807 extern int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action);
 808
 809 extern int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep);
 810
 811 /* Debug related function prototypes */
 812 extern void bnx2i_print_pend_cmd_queue(struct bnx2i_conn *conn);
 813 extern void bnx2i_print_active_cmd_queue(struct bnx2i_conn *conn);
 814 extern void bnx2i_print_xmit_pdu_queue(struct bnx2i_conn *conn);
 815 extern void bnx2i_print_recv_state(struct bnx2i_conn *conn);
 816
 817 extern int bnx2i_percpu_io_thread(void *arg);
 818 extern int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
 819                                        struct bnx2i_conn *bnx2i_conn,
 820                                        struct cqe *cqe);
 821 #endif