drivers/scsi/bnx2i/bnx2i.h

   1 /* bnx2i.h: QLogic NetXtreme II iSCSI driver.
   2  *
   3  * Copyright (c) 2006 - 2013 Broadcom Corporation
   4  * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
   5  * Copyright (c) 2007, 2008 Mike Christie
   6  * Copyright (c) 2014, QLogic Corporation
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation.
  11  *
  12  * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
  13  * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)
  14  * Maintained by: QLogic-Storage-Upstream@qlogic.com
  15  */
  16
  17 #ifndef _BNX2I_H_
  18 #define _BNX2I_H_
  19
  20 #include <linux/module.h>
  21 #include <linux/moduleparam.h>
  22
  23 #include <linux/errno.h>
  24 #include <linux/pci.h>
  25 #include <linux/spinlock.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/delay.h>
  28 #include <linux/sched/signal.h>
  29 #include <linux/in.h>
  30 #include <linux/kfifo.h>
  31 #include <linux/netdevice.h>
  32 #include <linux/completion.h>
  33 #include <linux/kthread.h>
  34 #include <linux/cpu.h>
  35
  36 #include <scsi/scsi_cmnd.h>
  37 #include <scsi/scsi_device.h>
  38 #include <scsi/scsi_eh.h>
  39 #include <scsi/scsi_host.h>
  40 #include <scsi/scsi.h>
  41 #include <scsi/iscsi_proto.h>
  42 #include <scsi/libiscsi.h>
  43 #include <scsi/scsi_transport_iscsi.h>
  44
  45 #include "../../net/ethernet/broadcom/cnic_if.h"
  46 #include "57xx_iscsi_hsi.h"
  47 #include "57xx_iscsi_constants.h"
  48
  49 #include "../../net/ethernet/broadcom/bnx2x/bnx2x_mfw_req.h"
  50
  51 #define BNX2_ISCSI_DRIVER_NAME          "bnx2i"
  52
  53 #define BNX2I_MAX_ADAPTERS              8
  54
  55 #define ISCSI_MAX_CONNS_PER_HBA         128
  56 #define ISCSI_MAX_SESS_PER_HBA          ISCSI_MAX_CONNS_PER_HBA
  57 #define ISCSI_MAX_CMDS_PER_SESS         128
  58
  59 /* Total active commands across all connections supported by devices */
  60 #define ISCSI_MAX_CMDS_PER_HBA_5708     (28 * (ISCSI_MAX_CMDS_PER_SESS - 1))
  61 #define ISCSI_MAX_CMDS_PER_HBA_5709     (128 * (ISCSI_MAX_CMDS_PER_SESS - 1))
  62 #define ISCSI_MAX_CMDS_PER_HBA_57710    (256 * (ISCSI_MAX_CMDS_PER_SESS - 1))
  63
  64 #define ISCSI_MAX_BDS_PER_CMD           32
  65
  66 #define MAX_PAGES_PER_CTRL_STRUCT_POOL  8
  67 #define BNX2I_RESERVED_SLOW_PATH_CMD_SLOTS      4
  68
  69 #define BNX2X_DB_SHIFT                  3
  70
  71 /* 5706/08 hardware has limit on maximum buffer size per BD it can handle */
  72 #define MAX_BD_LENGTH                   65535
  73 #define BD_SPLIT_SIZE                   32768
  74
  75 /* min, max & default values for SQ/RQ/CQ size, configurable via' modparam */
  76 #define BNX2I_SQ_WQES_MIN               16
  77 #define BNX2I_570X_SQ_WQES_MAX          128
  78 #define BNX2I_5770X_SQ_WQES_MAX         512
  79 #define BNX2I_570X_SQ_WQES_DEFAULT      128
  80 #define BNX2I_5770X_SQ_WQES_DEFAULT     128
  81
  82 #define BNX2I_570X_CQ_WQES_MAX          128
  83 #define BNX2I_5770X_CQ_WQES_MAX         512
  84
  85 #define BNX2I_RQ_WQES_MIN               16
  86 #define BNX2I_RQ_WQES_MAX               32
  87 #define BNX2I_RQ_WQES_DEFAULT           16
  88
  89 /* CCELLs per conn */
  90 #define BNX2I_CCELLS_MIN                16
  91 #define BNX2I_CCELLS_MAX                96
  92 #define BNX2I_CCELLS_DEFAULT            64
  93
  94 #define ITT_INVALID_SIGNATURE           0xFFFF
  95
  96 #define ISCSI_CMD_CLEANUP_TIMEOUT       100
  97
  98 #define BNX2I_CONN_CTX_BUF_SIZE         16384
  99
 100 #define BNX2I_SQ_WQE_SIZE               64
 101 #define BNX2I_RQ_WQE_SIZE               256
 102 #define BNX2I_CQE_SIZE                  64
 103
 104 #define MB_KERNEL_CTX_SHIFT             8
 105 #define MB_KERNEL_CTX_SIZE              (1 << MB_KERNEL_CTX_SHIFT)
 106
 107 #define CTX_SHIFT                       7
 108 #define GET_CID_NUM(cid_addr)           ((cid_addr) >> CTX_SHIFT)
 109
 110 #define CTX_OFFSET                      0x10000
 111 #define MAX_CID_CNT                     0x4000
 112
 113 #define BNX2I_570X_PAGE_SIZE_DEFAULT    4096
 114
 115 /* 5709 context registers */
 116 #define BNX2_MQ_CONFIG2                 0x00003d00
 117 #define BNX2_MQ_CONFIG2_CONT_SZ         (0x7L<<4)
 118 #define BNX2_MQ_CONFIG2_FIRST_L4L5      (0x1fL<<8)
 119
 120 /* 57710's BAR2 is mapped to doorbell registers */
 121 #define BNX2X_DOORBELL_PCI_BAR          2
 122 #define BNX2X_MAX_CQS                   8
 123
 124 #define CNIC_ARM_CQE                    1
 125 #define CNIC_ARM_CQE_FP                 2
 126 #define CNIC_DISARM_CQE                 0
 127
 128 #define REG_RD(__hba, offset)                           \
 129                 readl(__hba->regview + offset)
 130 #define REG_WR(__hba, offset, val)                      \
 131                 writel(val, __hba->regview + offset)
 132
 133 #ifdef CONFIG_32BIT
 134 #define GET_STATS_64(__hba, dst, field)                         \
 135         do {                                                    \
 136                 spin_lock_bh(&__hba->stat_lock);                \
 137                 dst->field##_lo = __hba->stats.field##_lo;      \
 138                 dst->field##_hi = __hba->stats.field##_hi;      \
 139                 spin_unlock_bh(&__hba->stat_lock);              \
 140         } while (0)
 141
 142 #define ADD_STATS_64(__hba, field, len)                         \
 143         do {                                                    \
 144                 if (spin_trylock(&__hba->stat_lock)) {          \
 145                         if (__hba->stats.field##_lo + len <     \
 146                             __hba->stats.field##_lo)            \
 147                                 __hba->stats.field##_hi++;      \
 148                         __hba->stats.field##_lo += len;         \
 149                         spin_unlock(&__hba->stat_lock);         \
 150                 }                                               \
 151         } while (0)
 152
 153 #else
 154 #define GET_STATS_64(__hba, dst, field)                         \
 155         do {                                                    \
 156                 u64 val, *out;                                  \
 157                                                                 \
 158                 val = __hba->bnx2i_stats.field;                 \
 159                 out = (u64 *)&__hba->stats.field##_lo;          \
 160                 *out = cpu_to_le64(val);                        \
 161                 out = (u64 *)&dst->field##_lo;                  \
 162                 *out = cpu_to_le64(val);                        \
 163         } while (0)
 164
 165 #define ADD_STATS_64(__hba, field, len)                         \
 166         do {                                                    \
 167                 __hba->bnx2i_stats.field += len;                \
 168         } while (0)
 169 #endif
 170
 171 /**
 172  * struct generic_pdu_resc - login pdu resource structure
 173  *
 174  * @req_buf:            driver buffer used to stage payload associated with
 175  *                      the login request
 176  * @req_dma_addr:       dma address for iscsi login request payload buffer
 177  * @req_buf_size:       actual login request payload length
 178  * @req_wr_ptr:         pointer into login request buffer when next data is
 179  *                      to be written
 180  * @resp_hdr:           iscsi header where iscsi login response header is to
 181  *                      be recreated
 182  * @resp_buf:           buffer to stage login response payload
 183  * @resp_dma_addr:      login response payload buffer dma address
 184  * @resp_buf_size:      login response paylod length
 185  * @resp_wr_ptr:        pointer into login response buffer when next data is
 186  *                      to be written
 187  * @req_bd_tbl:         iscsi login request payload BD table
 188  * @req_bd_dma:         login request BD table dma address
 189  * @resp_bd_tbl:        iscsi login response payload BD table
 190  * @resp_bd_dma:        login request BD table dma address
 191  *
 192  * following structure defines buffer info for generic pdus such as iSCSI Login,
 193  *      Logout and NOP
 194  */
 195 struct generic_pdu_resc {
 196         char *req_buf;
 197         dma_addr_t req_dma_addr;
 198         u32 req_buf_size;
 199         char *req_wr_ptr;
 200         struct iscsi_hdr resp_hdr;
 201         char *resp_buf;
 202         dma_addr_t resp_dma_addr;
 203         u32 resp_buf_size;
 204         char *resp_wr_ptr;
 205         char *req_bd_tbl;
 206         dma_addr_t req_bd_dma;
 207         char *resp_bd_tbl;
 208         dma_addr_t resp_bd_dma;
 209 };
 210
 211
 212 /**
 213  * struct bd_resc_page - tracks DMA'able memory allocated for BD tables
 214  *
 215  * @link:               list head to link elements
 216  * @max_ptrs:           maximun pointers that can be stored in this page
 217  * @num_valid:          number of pointer valid in this page
 218  * @page:               base addess for page pointer array
 219  *
 220  * structure to track DMA'able memory allocated for command BD tables
 221  */
 222 struct bd_resc_page {
 223         struct list_head link;
 224         u32 max_ptrs;
 225         u32 num_valid;
 226         void *page[1];
 227 };
 228
 229
 230 /**
 231  * struct io_bdt - I/O buffer destricptor table
 232  *
 233  * @bd_tbl:             BD table's virtual address
 234  * @bd_tbl_dma:         BD table's dma address
 235  * @bd_valid:           num valid BD entries
 236  *
 237  * IO BD table
 238  */
 239 struct io_bdt {
 240         struct iscsi_bd *bd_tbl;
 241         dma_addr_t bd_tbl_dma;
 242         u16 bd_valid;
 243 };
 244
 245
 246 /**
 247  * bnx2i_cmd - iscsi command structure
 248  *
 249  * @hdr:                iSCSI header
 250  * @conn:               iscsi_conn pointer
 251  * @scsi_cmd:           SCSI-ML task pointer corresponding to this iscsi cmd
 252  * @sg:                 SG list
 253  * @io_tbl:             buffer descriptor (BD) table
 254  * @bd_tbl_dma:         buffer descriptor (BD) table's dma address
 255  * @req:                bnx2i specific command request struct
 256  */
 257 struct bnx2i_cmd {
 258         struct iscsi_hdr hdr;
 259         struct bnx2i_conn *conn;
 260         struct scsi_cmnd *scsi_cmd;
 261         struct scatterlist *sg;
 262         struct io_bdt io_tbl;
 263         dma_addr_t bd_tbl_dma;
 264         struct bnx2i_cmd_request req;
 265 };
 266
 267
 268 /**
 269  * struct bnx2i_conn - iscsi connection structure
 270  *
 271  * @cls_conn:              pointer to iscsi cls conn
 272  * @hba:                   adapter structure pointer
 273  * @iscsi_conn_cid:        iscsi conn id
 274  * @fw_cid:                firmware iscsi context id
 275  * @ep:                    endpoint structure pointer
 276  * @gen_pdu:               login/nopout/logout pdu resources
 277  * @violation_notified:    bit mask used to track iscsi error/warning messages
 278  *                         already printed out
 279  * @work_cnt:              keeps track of the number of outstanding work
 280  *
 281  * iSCSI connection structure
 282  */
 283 struct bnx2i_conn {
 284         struct iscsi_cls_conn *cls_conn;
 285         struct bnx2i_hba *hba;
 286         struct completion cmd_cleanup_cmpl;
 287
 288         u32 iscsi_conn_cid;
 289 #define BNX2I_CID_RESERVED      0x5AFF
 290         u32 fw_cid;
 291
 292         struct timer_list poll_timer;
 293         /*
 294          * Queue Pair (QP) related structure elements.
 295          */
 296         struct bnx2i_endpoint *ep;
 297
 298         /*
 299          * Buffer for login negotiation process
 300          */
 301         struct generic_pdu_resc gen_pdu;
 302         u64 violation_notified;
 303
 304         atomic_t work_cnt;
 305 };
 306
 307
 308
 309 /**
 310  * struct iscsi_cid_queue - Per adapter iscsi cid queue
 311  *
 312  * @cid_que_base:           queue base memory
 313  * @cid_que:                queue memory pointer
 314  * @cid_q_prod_idx:         produce index
 315  * @cid_q_cons_idx:         consumer index
 316  * @cid_q_max_idx:          max index. used to detect wrap around condition
 317  * @cid_free_cnt:           queue size
 318  * @conn_cid_tbl:           iscsi cid to conn structure mapping table
 319  *
 320  * Per adapter iSCSI CID Queue
 321  */
 322 struct iscsi_cid_queue {
 323         void *cid_que_base;
 324         u32 *cid_que;
 325         u32 cid_q_prod_idx;
 326         u32 cid_q_cons_idx;
 327         u32 cid_q_max_idx;
 328         u32 cid_free_cnt;
 329         struct bnx2i_conn **conn_cid_tbl;
 330 };
 331
 332
 333 struct bnx2i_stats_info {
 334         u64 rx_pdus;
 335         u64 rx_bytes;
 336         u64 tx_pdus;
 337         u64 tx_bytes;
 338 };
 339
 340
 341 /**
 342  * struct bnx2i_hba - bnx2i adapter structure
 343  *
 344  * @link:                  list head to link elements
 345  * @cnic:                  pointer to cnic device
 346  * @pcidev:                pointer to pci dev
 347  * @netdev:                pointer to netdev structure
 348  * @regview:               mapped PCI register space
 349  * @age:                   age, incremented by every recovery
 350  * @cnic_dev_type:         cnic device type, 5706/5708/5709/57710
 351  * @mail_queue_access:     mailbox queue access mode, applicable to 5709 only
 352  * @reg_with_cnic:         indicates whether the device is register with CNIC
 353  * @adapter_state:         adapter state, UP, GOING_DOWN, LINK_DOWN
 354  * @mtu_supported:         Ethernet MTU supported
 355  * @shost:                 scsi host pointer
 356  * @max_sqes:              SQ size
 357  * @max_rqes:              RQ size
 358  * @max_cqes:              CQ size
 359  * @num_ccell:             number of command cells per connection
 360  * @ofld_conns_active:     active connection list
 361  * @eh_wait:               wait queue for the endpoint to shutdown
 362  * @max_active_conns:      max offload connections supported by this device
 363  * @cid_que:               iscsi cid queue
 364  * @ep_rdwr_lock:          read / write lock to synchronize various ep lists
 365  * @ep_ofld_list:          connection list for pending offload completion
 366  * @ep_active_list:        connection list for active offload endpoints
 367  * @ep_destroy_list:       connection list for pending offload completion
 368  * @mp_bd_tbl:             BD table to be used with middle path requests
 369  * @mp_bd_dma:             DMA address of 'mp_bd_tbl' memory buffer
 370  * @dummy_buffer:          Dummy buffer to be used with zero length scsicmd reqs
 371  * @dummy_buf_dma:         DMA address of 'dummy_buffer' memory buffer
 372  * @lock:                  lock to synchonize access to hba structure
 373  * @hba_shutdown_tmo:      Timeout value to shutdown each connection
 374  * @conn_teardown_tmo:     Timeout value to tear down each connection
 375  * @conn_ctx_destroy_tmo:  Timeout value to destroy context of each connection
 376  * @pci_did:               PCI device ID
 377  * @pci_vid:               PCI vendor ID
 378  * @pci_sdid:              PCI subsystem device ID
 379  * @pci_svid:              PCI subsystem vendor ID
 380  * @pci_func:              PCI function number in system pci tree
 381  * @pci_devno:             PCI device number in system pci tree
 382  * @num_wqe_sent:          statistic counter, total wqe's sent
 383  * @num_cqe_rcvd:          statistic counter, total cqe's received
 384  * @num_intr_claimed:      statistic counter, total interrupts claimed
 385  * @link_changed_count:    statistic counter, num of link change notifications
 386  *                         received
 387  * @ipaddr_changed_count:  statistic counter, num times IP address changed while
 388  *                         at least one connection is offloaded
 389  * @num_sess_opened:       statistic counter, total num sessions opened
 390  * @num_conn_opened:       statistic counter, total num conns opened on this hba
 391  * @ctx_ccell_tasks:       captures number of ccells and tasks supported by
 392  *                         currently offloaded connection, used to decode
 393  *                         context memory
 394  * @stat_lock:             spin lock used by the statistic collector (32 bit)
 395  * @stats:                 local iSCSI statistic collection place holder
 396  *
 397  * Adapter Data Structure
 398  */
 399 struct bnx2i_hba {
 400         struct list_head link;
 401         struct cnic_dev *cnic;
 402         struct pci_dev *pcidev;
 403         struct net_device *netdev;
 404         void __iomem *regview;
 405         resource_size_t reg_base;
 406
 407         u32 age;
 408         unsigned long cnic_dev_type;
 409                 #define BNX2I_NX2_DEV_5706              0x0
 410                 #define BNX2I_NX2_DEV_5708              0x1
 411                 #define BNX2I_NX2_DEV_5709              0x2
 412                 #define BNX2I_NX2_DEV_57710             0x3
 413         u32 mail_queue_access;
 414                 #define BNX2I_MQ_KERNEL_MODE            0x0
 415                 #define BNX2I_MQ_KERNEL_BYPASS_MODE     0x1
 416                 #define BNX2I_MQ_BIN_MODE               0x2
 417         unsigned long  reg_with_cnic;
 418                 #define BNX2I_CNIC_REGISTERED           1
 419
 420         unsigned long  adapter_state;
 421                 #define ADAPTER_STATE_UP                0
 422                 #define ADAPTER_STATE_GOING_DOWN        1
 423                 #define ADAPTER_STATE_LINK_DOWN         2
 424                 #define ADAPTER_STATE_INIT_FAILED       31
 425         unsigned int mtu_supported;
 426                 #define BNX2I_MAX_MTU_SUPPORTED         9000
 427
 428         struct Scsi_Host *shost;
 429
 430         u32 max_sqes;
 431         u32 max_rqes;
 432         u32 max_cqes;
 433         u32 num_ccell;
 434
 435         int ofld_conns_active;
 436         wait_queue_head_t eh_wait;
 437
 438         int max_active_conns;
 439         struct iscsi_cid_queue cid_que;
 440
 441         rwlock_t ep_rdwr_lock;
 442         struct list_head ep_ofld_list;
 443         struct list_head ep_active_list;
 444         struct list_head ep_destroy_list;
 445
 446         /*
 447          * BD table to be used with MP (Middle Path requests.
 448          */
 449         char *mp_bd_tbl;
 450         dma_addr_t mp_bd_dma;
 451         char *dummy_buffer;
 452         dma_addr_t dummy_buf_dma;
 453
 454         spinlock_t lock;        /* protects hba structure access */
 455         struct mutex net_dev_lock;/* sync net device access */
 456
 457         int hba_shutdown_tmo;
 458         int conn_teardown_tmo;
 459         int conn_ctx_destroy_tmo;
 460         /*
 461          * PCI related info.
 462          */
 463         u16 pci_did;
 464         u16 pci_vid;
 465         u16 pci_sdid;
 466         u16 pci_svid;
 467         u16 pci_func;
 468         u16 pci_devno;
 469
 470         /*
 471          * Following are a bunch of statistics useful during development
 472          * and later stage for score boarding.
 473          */
 474         u32 num_wqe_sent;
 475         u32 num_cqe_rcvd;
 476         u32 num_intr_claimed;
 477         u32 link_changed_count;
 478         u32 ipaddr_changed_count;
 479         u32 num_sess_opened;
 480         u32 num_conn_opened;
 481         unsigned int ctx_ccell_tasks;
 482
 483 #ifdef CONFIG_32BIT
 484         spinlock_t stat_lock;
 485 #endif
 486         struct bnx2i_stats_info bnx2i_stats;
 487         struct iscsi_stats_info stats;
 488 };
 489
 490
 491 /*******************************************************************************
 492  *      QP [ SQ / RQ / CQ ] info.
 493  ******************************************************************************/
 494
 495 /*
 496  * SQ/RQ/CQ generic structure definition
 497  */
 498 struct  sqe {
 499         u8 sqe_byte[BNX2I_SQ_WQE_SIZE];
 500 };
 501
 502 struct  rqe {
 503         u8 rqe_byte[BNX2I_RQ_WQE_SIZE];
 504 };
 505
 506 struct  cqe {
 507         u8 cqe_byte[BNX2I_CQE_SIZE];
 508 };
 509
 510
 511 enum {
 512 #if defined(__LITTLE_ENDIAN)
 513         CNIC_EVENT_COAL_INDEX   = 0x0,
 514         CNIC_SEND_DOORBELL      = 0x4,
 515         CNIC_EVENT_CQ_ARM       = 0x7,
 516         CNIC_RECV_DOORBELL      = 0x8
 517 #elif defined(__BIG_ENDIAN)
 518         CNIC_EVENT_COAL_INDEX   = 0x2,
 519         CNIC_SEND_DOORBELL      = 0x6,
 520         CNIC_EVENT_CQ_ARM       = 0x4,
 521         CNIC_RECV_DOORBELL      = 0xa
 522 #endif
 523 };
 524
 525
 526 /*
 527  * CQ DB
 528  */
 529 struct bnx2x_iscsi_cq_pend_cmpl {
 530         /* CQ producer, updated by Ustorm */
 531         u16 ustrom_prod;
 532         /* CQ pending completion counter */
 533         u16 pend_cntr;
 534 };
 535
 536
 537 struct bnx2i_5771x_cq_db {
 538         struct bnx2x_iscsi_cq_pend_cmpl qp_pend_cmpl[BNX2X_MAX_CQS];
 539         /* CQ pending completion ITT array */
 540         u16 itt[BNX2X_MAX_CQS];
 541         /* Cstorm CQ sequence to notify array, updated by driver */;
 542         u16 sqn[BNX2X_MAX_CQS];
 543         u32 reserved[4] /* 16 byte allignment */;
 544 };
 545
 546
 547 struct bnx2i_5771x_sq_rq_db {
 548         u16 prod_idx;
 549         u8 reserved0[62]; /* Pad structure size to 64 bytes */
 550 };
 551
 552
 553 struct bnx2i_5771x_dbell_hdr {
 554         u8 header;
 555         /* 1 for rx doorbell, 0 for tx doorbell */
 556 #define B577XX_DOORBELL_HDR_RX                          (0x1<<0)
 557 #define B577XX_DOORBELL_HDR_RX_SHIFT                    0
 558         /* 0 for normal doorbell, 1 for advertise wnd doorbell */
 559 #define B577XX_DOORBELL_HDR_DB_TYPE                     (0x1<<1)
 560 #define B577XX_DOORBELL_HDR_DB_TYPE_SHIFT               1
 561         /* rdma tx only: DPM transaction size specifier (64/128/256/512B) */
 562 #define B577XX_DOORBELL_HDR_DPM_SIZE                    (0x3<<2)
 563 #define B577XX_DOORBELL_HDR_DPM_SIZE_SHIFT              2
 564         /* connection type */
 565 #define B577XX_DOORBELL_HDR_CONN_TYPE                   (0xF<<4)
 566 #define B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT             4
 567 };
 568
 569 struct bnx2i_5771x_dbell {
 570         struct bnx2i_5771x_dbell_hdr dbell;
 571         u8 pad[3];
 572
 573 };
 574
 575 /**
 576  * struct qp_info - QP (share queue region) atrributes structure
 577  *
 578  * @ctx_base:           ioremapped pci register base to access doorbell register
 579  *                      pertaining to this offloaded connection
 580  * @sq_virt:            virtual address of send queue (SQ) region
 581  * @sq_phys:            DMA address of SQ memory region
 582  * @sq_mem_size:        SQ size
 583  * @sq_prod_qe:         SQ producer entry pointer
 584  * @sq_cons_qe:         SQ consumer entry pointer
 585  * @sq_first_qe:        virtual address of first entry in SQ
 586  * @sq_last_qe:         virtual address of last entry in SQ
 587  * @sq_prod_idx:        SQ producer index
 588  * @sq_cons_idx:        SQ consumer index
 589  * @sqe_left:           number sq entry left
 590  * @sq_pgtbl_virt:      page table describing buffer consituting SQ region
 591  * @sq_pgtbl_phys:      dma address of 'sq_pgtbl_virt'
 592  * @sq_pgtbl_size:      SQ page table size
 593  * @cq_virt:            virtual address of completion queue (CQ) region
 594  * @cq_phys:            DMA address of RQ memory region
 595  * @cq_mem_size:        CQ size
 596  * @cq_prod_qe:         CQ producer entry pointer
 597  * @cq_cons_qe:         CQ consumer entry pointer
 598  * @cq_first_qe:        virtual address of first entry in CQ
 599  * @cq_last_qe:         virtual address of last entry in CQ
 600  * @cq_prod_idx:        CQ producer index
 601  * @cq_cons_idx:        CQ consumer index
 602  * @cqe_left:           number cq entry left
 603  * @cqe_size:           size of each CQ entry
 604  * @cqe_exp_seq_sn:     next expected CQE sequence number
 605  * @cq_pgtbl_virt:      page table describing buffer consituting CQ region
 606  * @cq_pgtbl_phys:      dma address of 'cq_pgtbl_virt'
 607  * @cq_pgtbl_size:      CQ page table size
 608  * @rq_virt:            virtual address of receive queue (RQ) region
 609  * @rq_phys:            DMA address of RQ memory region
 610  * @rq_mem_size:        RQ size
 611  * @rq_prod_qe:         RQ producer entry pointer
 612  * @rq_cons_qe:         RQ consumer entry pointer
 613  * @rq_first_qe:        virtual address of first entry in RQ
 614  * @rq_last_qe:         virtual address of last entry in RQ
 615  * @rq_prod_idx:        RQ producer index
 616  * @rq_cons_idx:        RQ consumer index
 617  * @rqe_left:           number rq entry left
 618  * @rq_pgtbl_virt:      page table describing buffer consituting RQ region
 619  * @rq_pgtbl_phys:      dma address of 'rq_pgtbl_virt'
 620  * @rq_pgtbl_size:      RQ page table size
 621  *
 622  * queue pair (QP) is a per connection shared data structure which is used
 623  *      to send work requests (SQ), receive completion notifications (CQ)
 624  *      and receive asynchoronous / scsi sense info (RQ). 'qp_info' structure
 625  *      below holds queue memory, consumer/producer indexes and page table
 626  *      information
 627  */
 628 struct qp_info {
 629         void __iomem *ctx_base;
 630 #define DPM_TRIGER_TYPE                 0x40
 631
 632 #define BNX2I_570x_QUE_DB_SIZE          0
 633 #define BNX2I_5771x_QUE_DB_SIZE         16
 634         struct sqe *sq_virt;
 635         dma_addr_t sq_phys;
 636         u32 sq_mem_size;
 637
 638         struct sqe *sq_prod_qe;
 639         struct sqe *sq_cons_qe;
 640         struct sqe *sq_first_qe;
 641         struct sqe *sq_last_qe;
 642         u16 sq_prod_idx;
 643         u16 sq_cons_idx;
 644         u32 sqe_left;
 645
 646         void *sq_pgtbl_virt;
 647         dma_addr_t sq_pgtbl_phys;
 648         u32 sq_pgtbl_size;      /* set to PAGE_SIZE for 5708 & 5709 */
 649
 650         struct cqe *cq_virt;
 651         dma_addr_t cq_phys;
 652         u32 cq_mem_size;
 653
 654         struct cqe *cq_prod_qe;
 655         struct cqe *cq_cons_qe;
 656         struct cqe *cq_first_qe;
 657         struct cqe *cq_last_qe;
 658         u16 cq_prod_idx;
 659         u16 cq_cons_idx;
 660         u32 cqe_left;
 661         u32 cqe_size;
 662         u32 cqe_exp_seq_sn;
 663
 664         void *cq_pgtbl_virt;
 665         dma_addr_t cq_pgtbl_phys;
 666         u32 cq_pgtbl_size;      /* set to PAGE_SIZE for 5708 & 5709 */
 667
 668         struct rqe *rq_virt;
 669         dma_addr_t rq_phys;
 670         u32 rq_mem_size;
 671
 672         struct rqe *rq_prod_qe;
 673         struct rqe *rq_cons_qe;
 674         struct rqe *rq_first_qe;
 675         struct rqe *rq_last_qe;
 676         u16 rq_prod_idx;
 677         u16 rq_cons_idx;
 678         u32 rqe_left;
 679
 680         void *rq_pgtbl_virt;
 681         dma_addr_t rq_pgtbl_phys;
 682         u32 rq_pgtbl_size;      /* set to PAGE_SIZE for 5708 & 5709 */
 683 };
 684
 685
 686
 687 /*
 688  * CID handles
 689  */
 690 struct ep_handles {
 691         u32 fw_cid;
 692         u32 drv_iscsi_cid;
 693         u16 pg_cid;
 694         u16 rsvd;
 695 };
 696
 697
 698 enum {
 699         EP_STATE_IDLE                   = 0x0,
 700         EP_STATE_PG_OFLD_START          = 0x1,
 701         EP_STATE_PG_OFLD_COMPL          = 0x2,
 702         EP_STATE_OFLD_START             = 0x4,
 703         EP_STATE_OFLD_COMPL             = 0x8,
 704         EP_STATE_CONNECT_START          = 0x10,
 705         EP_STATE_CONNECT_COMPL          = 0x20,
 706         EP_STATE_ULP_UPDATE_START       = 0x40,
 707         EP_STATE_ULP_UPDATE_COMPL       = 0x80,
 708         EP_STATE_DISCONN_START          = 0x100,
 709         EP_STATE_DISCONN_COMPL          = 0x200,
 710         EP_STATE_CLEANUP_START          = 0x400,
 711         EP_STATE_CLEANUP_CMPL           = 0x800,
 712         EP_STATE_TCP_FIN_RCVD           = 0x1000,
 713         EP_STATE_TCP_RST_RCVD           = 0x2000,
 714         EP_STATE_LOGOUT_SENT            = 0x4000,
 715         EP_STATE_LOGOUT_RESP_RCVD       = 0x8000,
 716         EP_STATE_PG_OFLD_FAILED         = 0x1000000,
 717         EP_STATE_ULP_UPDATE_FAILED      = 0x2000000,
 718         EP_STATE_CLEANUP_FAILED         = 0x4000000,
 719         EP_STATE_OFLD_FAILED            = 0x8000000,
 720         EP_STATE_CONNECT_FAILED         = 0x10000000,
 721         EP_STATE_DISCONN_TIMEDOUT       = 0x20000000,
 722         EP_STATE_OFLD_FAILED_CID_BUSY   = 0x80000000,
 723 };
 724
 725 /**
 726  * struct bnx2i_endpoint - representation of tcp connection in NX2 world
 727  *
 728  * @link:               list head to link elements
 729  * @hba:                adapter to which this connection belongs
 730  * @conn:               iscsi connection this EP is linked to
 731  * @cls_ep:             associated iSCSI endpoint pointer
 732  * @cm_sk:              cnic sock struct
 733  * @hba_age:            age to detect if 'iscsid' issues ep_disconnect()
 734  *                      after HBA reset is completed by bnx2i/cnic/bnx2
 735  *                      modules
 736  * @state:              tracks offload connection state machine
 737  * @timestamp:          tracks the start time when the ep begins to connect
 738  * @num_active_cmds:    tracks the number of outstanding commands for this ep
 739  * @ec_shift:           the amount of shift as part of the event coal calc
 740  * @qp:                 QP information
 741  * @ids:                contains chip allocated *context id* & driver assigned
 742  *                      *iscsi cid*
 743  * @ofld_timer:         offload timer to detect timeout
 744  * @ofld_wait:          wait queue
 745  *
 746  * Endpoint Structure - equivalent of tcp socket structure
 747  */
 748 struct bnx2i_endpoint {
 749         struct list_head link;
 750         struct bnx2i_hba *hba;
 751         struct bnx2i_conn *conn;
 752         struct iscsi_endpoint *cls_ep;
 753         struct cnic_sock *cm_sk;
 754         u32 hba_age;
 755         u32 state;
 756         unsigned long timestamp;
 757         atomic_t num_active_cmds;
 758         u32 ec_shift;
 759
 760         struct qp_info qp;
 761         struct ep_handles ids;
 762                 #define ep_iscsi_cid    ids.drv_iscsi_cid
 763                 #define ep_cid          ids.fw_cid
 764                 #define ep_pg_cid       ids.pg_cid
 765         struct timer_list ofld_timer;
 766         wait_queue_head_t ofld_wait;
 767 };
 768
 769
 770 struct bnx2i_work {
 771         struct list_head list;
 772         struct iscsi_session *session;
 773         struct bnx2i_conn *bnx2i_conn;
 774         struct cqe cqe;
 775 };
 776
 777 struct bnx2i_percpu_s {
 778         struct task_struct *iothread;
 779         struct list_head work_list;
 780         spinlock_t p_work_lock;
 781 };
 782
 783
 784 /* Global variables */
 785 extern unsigned int error_mask1, error_mask2;
 786 extern u64 iscsi_error_mask;
 787 extern unsigned int en_tcp_dack;
 788 extern unsigned int event_coal_div;
 789 extern unsigned int event_coal_min;
 790
 791 extern struct scsi_transport_template *bnx2i_scsi_xport_template;
 792 extern struct iscsi_transport bnx2i_iscsi_transport;
 793 extern struct cnic_ulp_ops bnx2i_cnic_cb;
 794
 795 extern unsigned int sq_size;
 796 extern unsigned int rq_size;
 797
 798 extern struct device_attribute *bnx2i_dev_attributes[];
 799
 800
 801
 802 /*
 803  * Function Prototypes
 804  */
 805 extern void bnx2i_identify_device(struct bnx2i_hba *hba, struct cnic_dev *dev);
 806
 807 extern void bnx2i_ulp_init(struct cnic_dev *dev);
 808 extern void bnx2i_ulp_exit(struct cnic_dev *dev);
 809 extern void bnx2i_start(void *handle);
 810 extern void bnx2i_stop(void *handle);
 811 extern int bnx2i_get_stats(void *handle);
 812
 813 extern struct bnx2i_hba *get_adapter_list_head(void);
 814
 815 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
 816                                           u16 iscsi_cid);
 817
 818 int bnx2i_alloc_ep_pool(void);
 819 void bnx2i_release_ep_pool(void);
 820 struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba);
 821 struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba);
 822
 823 struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic);
 824
 825 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic);
 826 void bnx2i_free_hba(struct bnx2i_hba *hba);
 827
 828 void bnx2i_get_rq_buf(struct bnx2i_conn *conn, char *ptr, int len);
 829 void bnx2i_put_rq_buf(struct bnx2i_conn *conn, int count);
 830
 831 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd);
 832
 833 void bnx2i_drop_session(struct iscsi_cls_session *session);
 834
 835 extern int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba);
 836 extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn,
 837                                   struct iscsi_task *mtask);
 838 extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn,
 839                                   struct iscsi_task *mtask);
 840 extern int bnx2i_send_iscsi_text(struct bnx2i_conn *conn,
 841                                  struct iscsi_task *mtask);
 842 extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn,
 843                                     struct bnx2i_cmd *cmnd);
 844 extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn,
 845                                    struct iscsi_task *mtask,
 846                                    char *datap, int data_len, int unsol);
 847 extern int bnx2i_send_iscsi_logout(struct bnx2i_conn *conn,
 848                                    struct iscsi_task *mtask);
 849 extern void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba,
 850                                        struct bnx2i_cmd *cmd);
 851 extern int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba,
 852                                     struct bnx2i_endpoint *ep);
 853 extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn);
 854 extern int bnx2i_send_conn_destroy(struct bnx2i_hba *hba,
 855                                    struct bnx2i_endpoint *ep);
 856
 857 extern int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba,
 858                                struct bnx2i_endpoint *ep);
 859 extern void bnx2i_free_qp_resc(struct bnx2i_hba *hba,
 860                                struct bnx2i_endpoint *ep);
 861 extern void bnx2i_ep_ofld_timer(struct timer_list *t);
 862 extern struct bnx2i_endpoint *bnx2i_find_ep_in_ofld_list(
 863                 struct bnx2i_hba *hba, u32 iscsi_cid);
 864 extern struct bnx2i_endpoint *bnx2i_find_ep_in_destroy_list(
 865                 struct bnx2i_hba *hba, u32 iscsi_cid);
 866
 867 extern int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep);
 868 extern int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action);
 869
 870 extern int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep);
 871
 872 /* Debug related function prototypes */
 873 extern void bnx2i_print_pend_cmd_queue(struct bnx2i_conn *conn);
 874 extern void bnx2i_print_active_cmd_queue(struct bnx2i_conn *conn);
 875 extern void bnx2i_print_xmit_pdu_queue(struct bnx2i_conn *conn);
 876 extern void bnx2i_print_recv_state(struct bnx2i_conn *conn);
 877
 878 extern int bnx2i_percpu_io_thread(void *arg);
 879 extern int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
 880                                        struct bnx2i_conn *bnx2i_conn,
 881                                        struct cqe *cqe);
 882 #endif