drivers/scsi/bnx2i/bnx2i.h

   1 /* bnx2i.h: Broadcom NetXtreme II iSCSI driver.
   2  *
   3  * Copyright (c) 2006 - 2012 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 #include "../../net/ethernet/broadcom/bnx2x/bnx2x_mfw_req.h"
  48
  49 #define BNX2_ISCSI_DRIVER_NAME          "bnx2i"
  50
  51 #define BNX2I_MAX_ADAPTERS              8
  52
  53 #define ISCSI_MAX_CONNS_PER_HBA         128
  54 #define ISCSI_MAX_SESS_PER_HBA          ISCSI_MAX_CONNS_PER_HBA
  55 #define ISCSI_MAX_CMDS_PER_SESS         128
  56
  57 /* Total active commands across all connections supported by devices */
  58 #define ISCSI_MAX_CMDS_PER_HBA_5708     (28 * (ISCSI_MAX_CMDS_PER_SESS - 1))
  59 #define ISCSI_MAX_CMDS_PER_HBA_5709     (128 * (ISCSI_MAX_CMDS_PER_SESS - 1))
  60 #define ISCSI_MAX_CMDS_PER_HBA_57710    (256 * (ISCSI_MAX_CMDS_PER_SESS - 1))
  61
  62 #define ISCSI_MAX_BDS_PER_CMD           32
  63
  64 #define MAX_PAGES_PER_CTRL_STRUCT_POOL  8
  65 #define BNX2I_RESERVED_SLOW_PATH_CMD_SLOTS      4
  66
  67 #define BNX2I_5771X_DBELL_PAGE_SIZE     128
  68
  69 /* 5706/08 hardware has limit on maximum buffer size per BD it can handle */
  70 #define MAX_BD_LENGTH                   65535
  71 #define BD_SPLIT_SIZE                   32768
  72
  73 /* min, max & default values for SQ/RQ/CQ size, configurable via' modparam */
  74 #define BNX2I_SQ_WQES_MIN               16
  75 #define BNX2I_570X_SQ_WQES_MAX          128
  76 #define BNX2I_5770X_SQ_WQES_MAX         512
  77 #define BNX2I_570X_SQ_WQES_DEFAULT      128
  78 #define BNX2I_5770X_SQ_WQES_DEFAULT     128
  79
  80 #define BNX2I_570X_CQ_WQES_MAX          128
  81 #define BNX2I_5770X_CQ_WQES_MAX         512
  82
  83 #define BNX2I_RQ_WQES_MIN               16
  84 #define BNX2I_RQ_WQES_MAX               32
  85 #define BNX2I_RQ_WQES_DEFAULT           16
  86
  87 /* CCELLs per conn */
  88 #define BNX2I_CCELLS_MIN                16
  89 #define BNX2I_CCELLS_MAX                96
  90 #define BNX2I_CCELLS_DEFAULT            64
  91
  92 #define ITT_INVALID_SIGNATURE           0xFFFF
  93
  94 #define ISCSI_CMD_CLEANUP_TIMEOUT       100
  95
  96 #define BNX2I_CONN_CTX_BUF_SIZE         16384
  97
  98 #define BNX2I_SQ_WQE_SIZE               64
  99 #define BNX2I_RQ_WQE_SIZE               256
 100 #define BNX2I_CQE_SIZE                  64
 101
 102 #define MB_KERNEL_CTX_SHIFT             8
 103 #define MB_KERNEL_CTX_SIZE              (1 << MB_KERNEL_CTX_SHIFT)
 104
 105 #define CTX_SHIFT                       7
 106 #define GET_CID_NUM(cid_addr)           ((cid_addr) >> CTX_SHIFT)
 107
 108 #define CTX_OFFSET                      0x10000
 109 #define MAX_CID_CNT                     0x4000
 110
 111 #define BNX2I_570X_PAGE_SIZE_DEFAULT    4096
 112
 113 /* 5709 context registers */
 114 #define BNX2_MQ_CONFIG2                 0x00003d00
 115 #define BNX2_MQ_CONFIG2_CONT_SZ         (0x7L<<4)
 116 #define BNX2_MQ_CONFIG2_FIRST_L4L5      (0x1fL<<8)
 117
 118 /* 57710's BAR2 is mapped to doorbell registers */
 119 #define BNX2X_DOORBELL_PCI_BAR          2
 120 #define BNX2X_MAX_CQS                   8
 121
 122 #define CNIC_ARM_CQE                    1
 123 #define CNIC_ARM_CQE_FP                 2
 124 #define CNIC_DISARM_CQE                 0
 125
 126 #define REG_RD(__hba, offset)                           \
 127                 readl(__hba->regview + offset)
 128 #define REG_WR(__hba, offset, val)                      \
 129                 writel(val, __hba->regview + offset)
 130
 131 #ifdef CONFIG_32BIT
 132 #define GET_STATS_64(__hba, dst, field)                         \
 133         do {                                                    \
 134                 spin_lock_bh(&__hba->stat_lock);                \
 135                 dst->field##_lo = __hba->stats.field##_lo;      \
 136                 dst->field##_hi = __hba->stats.field##_hi;      \
 137                 spin_unlock_bh(&__hba->stat_lock);              \
 138         } while (0)
 139
 140 #define ADD_STATS_64(__hba, field, len)                         \
 141         do {                                                    \
 142                 if (spin_trylock(&__hba->stat_lock)) {          \
 143                         if (__hba->stats.field##_lo + len <     \
 144                             __hba->stats.field##_lo)            \
 145                                 __hba->stats.field##_hi++;      \
 146                         __hba->stats.field##_lo += len;         \
 147                         spin_unlock(&__hba->stat_lock);         \
 148                 }                                               \
 149         } while (0)
 150
 151 #else
 152 #define GET_STATS_64(__hba, dst, field)                         \
 153         do {                                                    \
 154                 u64 val, *out;                                  \
 155                                                                 \
 156                 val = __hba->bnx2i_stats.field;                 \
 157                 out = (u64 *)&__hba->stats.field##_lo;          \
 158                 *out = cpu_to_le64(val);                        \
 159                 out = (u64 *)&dst->field##_lo;                  \
 160                 *out = cpu_to_le64(val);                        \
 161         } while (0)
 162
 163 #define ADD_STATS_64(__hba, field, len)                         \
 164         do {                                                    \
 165                 __hba->bnx2i_stats.field += len;                \
 166         } while (0)
 167 #endif
 168
 169 /**
 170  * struct generic_pdu_resc - login pdu resource structure
 171  *
 172  * @req_buf:            driver buffer used to stage payload associated with
 173  *                      the login request
 174  * @req_dma_addr:       dma address for iscsi login request payload buffer
 175  * @req_buf_size:       actual login request payload length
 176  * @req_wr_ptr:         pointer into login request buffer when next data is
 177  *                      to be written
 178  * @resp_hdr:           iscsi header where iscsi login response header is to
 179  *                      be recreated
 180  * @resp_buf:           buffer to stage login response payload
 181  * @resp_dma_addr:      login response payload buffer dma address
 182  * @resp_buf_size:      login response paylod length
 183  * @resp_wr_ptr:        pointer into login response buffer when next data is
 184  *                      to be written
 185  * @req_bd_tbl:         iscsi login request payload BD table
 186  * @req_bd_dma:         login request BD table dma address
 187  * @resp_bd_tbl:        iscsi login response payload BD table
 188  * @resp_bd_dma:        login request BD table dma address
 189  *
 190  * following structure defines buffer info for generic pdus such as iSCSI Login,
 191  *      Logout and NOP
 192  */
 193 struct generic_pdu_resc {
 194         char *req_buf;
 195         dma_addr_t req_dma_addr;
 196         u32 req_buf_size;
 197         char *req_wr_ptr;
 198         struct iscsi_hdr resp_hdr;
 199         char *resp_buf;
 200         dma_addr_t resp_dma_addr;
 201         u32 resp_buf_size;
 202         char *resp_wr_ptr;
 203         char *req_bd_tbl;
 204         dma_addr_t req_bd_dma;
 205         char *resp_bd_tbl;
 206         dma_addr_t resp_bd_dma;
 207 };
 208
 209
 210 /**
 211  * struct bd_resc_page - tracks DMA'able memory allocated for BD tables
 212  *
 213  * @link:               list head to link elements
 214  * @max_ptrs:           maximun pointers that can be stored in this page
 215  * @num_valid:          number of pointer valid in this page
 216  * @page:               base addess for page pointer array
 217  *
 218  * structure to track DMA'able memory allocated for command BD tables
 219  */
 220 struct bd_resc_page {
 221         struct list_head link;
 222         u32 max_ptrs;
 223         u32 num_valid;
 224         void *page[1];
 225 };
 226
 227
 228 /**
 229  * struct io_bdt - I/O buffer destricptor table
 230  *
 231  * @bd_tbl:             BD table's virtual address
 232  * @bd_tbl_dma:         BD table's dma address
 233  * @bd_valid:           num valid BD entries
 234  *
 235  * IO BD table
 236  */
 237 struct io_bdt {
 238         struct iscsi_bd *bd_tbl;
 239         dma_addr_t bd_tbl_dma;
 240         u16 bd_valid;
 241 };
 242
 243
 244 /**
 245  * bnx2i_cmd - iscsi command structure
 246  *
 247  * @hdr:                iSCSI header
 248  * @conn:               iscsi_conn pointer
 249  * @scsi_cmd:           SCSI-ML task pointer corresponding to this iscsi cmd
 250  * @sg:                 SG list
 251  * @io_tbl:             buffer descriptor (BD) table
 252  * @bd_tbl_dma:         buffer descriptor (BD) table's dma address
 253  * @req:                bnx2i specific command request struct
 254  */
 255 struct bnx2i_cmd {
 256         struct iscsi_hdr hdr;
 257         struct bnx2i_conn *conn;
 258         struct scsi_cmnd *scsi_cmd;
 259         struct scatterlist *sg;
 260         struct io_bdt io_tbl;
 261         dma_addr_t bd_tbl_dma;
 262         struct bnx2i_cmd_request req;
 263 };
 264
 265
 266 /**
 267  * struct bnx2i_conn - iscsi connection structure
 268  *
 269  * @cls_conn:              pointer to iscsi cls conn
 270  * @hba:                   adapter structure pointer
 271  * @iscsi_conn_cid:        iscsi conn id
 272  * @fw_cid:                firmware iscsi context id
 273  * @ep:                    endpoint structure pointer
 274  * @gen_pdu:               login/nopout/logout pdu resources
 275  * @violation_notified:    bit mask used to track iscsi error/warning messages
 276  *                         already printed out
 277  * @work_cnt:              keeps track of the number of outstanding work
 278  *
 279  * iSCSI connection structure
 280  */
 281 struct bnx2i_conn {
 282         struct iscsi_cls_conn *cls_conn;
 283         struct bnx2i_hba *hba;
 284         struct completion cmd_cleanup_cmpl;
 285
 286         u32 iscsi_conn_cid;
 287 #define BNX2I_CID_RESERVED      0x5AFF
 288         u32 fw_cid;
 289
 290         struct timer_list poll_timer;
 291         /*
 292          * Queue Pair (QP) related structure elements.
 293          */
 294         struct bnx2i_endpoint *ep;
 295
 296         /*
 297          * Buffer for login negotiation process
 298          */
 299         struct generic_pdu_resc gen_pdu;
 300         u64 violation_notified;
 301
 302         atomic_t work_cnt;
 303 };
 304
 305
 306
 307 /**
 308  * struct iscsi_cid_queue - Per adapter iscsi cid queue
 309  *
 310  * @cid_que_base:           queue base memory
 311  * @cid_que:                queue memory pointer
 312  * @cid_q_prod_idx:         produce index
 313  * @cid_q_cons_idx:         consumer index
 314  * @cid_q_max_idx:          max index. used to detect wrap around condition
 315  * @cid_free_cnt:           queue size
 316  * @conn_cid_tbl:           iscsi cid to conn structure mapping table
 317  *
 318  * Per adapter iSCSI CID Queue
 319  */
 320 struct iscsi_cid_queue {
 321         void *cid_que_base;
 322         u32 *cid_que;
 323         u32 cid_q_prod_idx;
 324         u32 cid_q_cons_idx;
 325         u32 cid_q_max_idx;
 326         u32 cid_free_cnt;
 327         struct bnx2i_conn **conn_cid_tbl;
 328 };
 329
 330
 331 struct bnx2i_stats_info {
 332         u64 rx_pdus;
 333         u64 rx_bytes;
 334         u64 tx_pdus;
 335         u64 tx_bytes;
 336 };
 337
 338
 339 /**
 340  * struct bnx2i_hba - bnx2i adapter structure
 341  *
 342  * @link:                  list head to link elements
 343  * @cnic:                  pointer to cnic device
 344  * @pcidev:                pointer to pci dev
 345  * @netdev:                pointer to netdev structure
 346  * @regview:               mapped PCI register space
 347  * @age:                   age, incremented by every recovery
 348  * @cnic_dev_type:         cnic device type, 5706/5708/5709/57710
 349  * @mail_queue_access:     mailbox queue access mode, applicable to 5709 only
 350  * @reg_with_cnic:         indicates whether the device is register with CNIC
 351  * @adapter_state:         adapter state, UP, GOING_DOWN, LINK_DOWN
 352  * @mtu_supported:         Ethernet MTU supported
 353  * @shost:                 scsi host pointer
 354  * @max_sqes:              SQ size
 355  * @max_rqes:              RQ size
 356  * @max_cqes:              CQ size
 357  * @num_ccell:             number of command cells per connection
 358  * @ofld_conns_active:     active connection list
 359  * @eh_wait:               wait queue for the endpoint to shutdown
 360  * @max_active_conns:      max offload connections supported by this device
 361  * @cid_que:               iscsi cid queue
 362  * @ep_rdwr_lock:          read / write lock to synchronize various ep lists
 363  * @ep_ofld_list:          connection list for pending offload completion
 364  * @ep_active_list:        connection list for active offload endpoints
 365  * @ep_destroy_list:       connection list for pending offload completion
 366  * @mp_bd_tbl:             BD table to be used with middle path requests
 367  * @mp_bd_dma:             DMA address of 'mp_bd_tbl' memory buffer
 368  * @dummy_buffer:          Dummy buffer to be used with zero length scsicmd reqs
 369  * @dummy_buf_dma:         DMA address of 'dummy_buffer' memory buffer
 370  * @lock:                  lock to synchonize access to hba structure
 371  * @hba_shutdown_tmo:      Timeout value to shutdown each connection
 372  * @conn_teardown_tmo:     Timeout value to tear down each connection
 373  * @conn_ctx_destroy_tmo:  Timeout value to destroy context of each connection
 374  * @pci_did:               PCI device ID
 375  * @pci_vid:               PCI vendor ID
 376  * @pci_sdid:              PCI subsystem device ID
 377  * @pci_svid:              PCI subsystem vendor ID
 378  * @pci_func:              PCI function number in system pci tree
 379  * @pci_devno:             PCI device number in system pci tree
 380  * @num_wqe_sent:          statistic counter, total wqe's sent
 381  * @num_cqe_rcvd:          statistic counter, total cqe's received
 382  * @num_intr_claimed:      statistic counter, total interrupts claimed
 383  * @link_changed_count:    statistic counter, num of link change notifications
 384  *                         received
 385  * @ipaddr_changed_count:  statistic counter, num times IP address changed while
 386  *                         at least one connection is offloaded
 387  * @num_sess_opened:       statistic counter, total num sessions opened
 388  * @num_conn_opened:       statistic counter, total num conns opened on this hba
 389  * @ctx_ccell_tasks:       captures number of ccells and tasks supported by
 390  *                         currently offloaded connection, used to decode
 391  *                         context memory
 392  * @stat_lock:             spin lock used by the statistic collector (32 bit)
 393  * @stats:                 local iSCSI statistic collection place holder
 394  *
 395  * Adapter Data Structure
 396  */
 397 struct bnx2i_hba {
 398         struct list_head link;
 399         struct cnic_dev *cnic;
 400         struct pci_dev *pcidev;
 401         struct net_device *netdev;
 402         void __iomem *regview;
 403         resource_size_t reg_base;
 404
 405         u32 age;
 406         unsigned long cnic_dev_type;
 407                 #define BNX2I_NX2_DEV_5706              0x0
 408                 #define BNX2I_NX2_DEV_5708              0x1
 409                 #define BNX2I_NX2_DEV_5709              0x2
 410                 #define BNX2I_NX2_DEV_57710             0x3
 411         u32 mail_queue_access;
 412                 #define BNX2I_MQ_KERNEL_MODE            0x0
 413                 #define BNX2I_MQ_KERNEL_BYPASS_MODE     0x1
 414                 #define BNX2I_MQ_BIN_MODE               0x2
 415         unsigned long  reg_with_cnic;
 416                 #define BNX2I_CNIC_REGISTERED           1
 417
 418         unsigned long  adapter_state;
 419                 #define ADAPTER_STATE_UP                0
 420                 #define ADAPTER_STATE_GOING_DOWN        1
 421                 #define ADAPTER_STATE_LINK_DOWN         2
 422                 #define ADAPTER_STATE_INIT_FAILED       31
 423         unsigned int mtu_supported;
 424                 #define BNX2I_MAX_MTU_SUPPORTED         9000
 425
 426         struct Scsi_Host *shost;
 427
 428         u32 max_sqes;
 429         u32 max_rqes;
 430         u32 max_cqes;
 431         u32 num_ccell;
 432
 433         int ofld_conns_active;
 434         wait_queue_head_t eh_wait;
 435
 436         int max_active_conns;
 437         struct iscsi_cid_queue cid_que;
 438
 439         rwlock_t ep_rdwr_lock;
 440         struct list_head ep_ofld_list;
 441         struct list_head ep_active_list;
 442         struct list_head ep_destroy_list;
 443
 444         /*
 445          * BD table to be used with MP (Middle Path requests.
 446          */
 447         char *mp_bd_tbl;
 448         dma_addr_t mp_bd_dma;
 449         char *dummy_buffer;
 450         dma_addr_t dummy_buf_dma;
 451
 452         spinlock_t lock;        /* protects hba structure access */
 453         struct mutex net_dev_lock;/* sync net device access */
 454
 455         int hba_shutdown_tmo;
 456         int conn_teardown_tmo;
 457         int conn_ctx_destroy_tmo;
 458         /*
 459          * PCI related info.
 460          */
 461         u16 pci_did;
 462         u16 pci_vid;
 463         u16 pci_sdid;
 464         u16 pci_svid;
 465         u16 pci_func;
 466         u16 pci_devno;
 467
 468         /*
 469          * Following are a bunch of statistics useful during development
 470          * and later stage for score boarding.
 471          */
 472         u32 num_wqe_sent;
 473         u32 num_cqe_rcvd;
 474         u32 num_intr_claimed;
 475         u32 link_changed_count;
 476         u32 ipaddr_changed_count;
 477         u32 num_sess_opened;
 478         u32 num_conn_opened;
 479         unsigned int ctx_ccell_tasks;
 480
 481 #ifdef CONFIG_32BIT
 482         spinlock_t stat_lock;
 483 #endif
 484         struct bnx2i_stats_info bnx2i_stats;
 485         struct iscsi_stats_info stats;
 486 };
 487
 488
 489 /*******************************************************************************
 490  *      QP [ SQ / RQ / CQ ] info.
 491  ******************************************************************************/
 492
 493 /*
 494  * SQ/RQ/CQ generic structure definition
 495  */
 496 struct  sqe {
 497         u8 sqe_byte[BNX2I_SQ_WQE_SIZE];
 498 };
 499
 500 struct  rqe {
 501         u8 rqe_byte[BNX2I_RQ_WQE_SIZE];
 502 };
 503
 504 struct  cqe {
 505         u8 cqe_byte[BNX2I_CQE_SIZE];
 506 };
 507
 508
 509 enum {
 510 #if defined(__LITTLE_ENDIAN)
 511         CNIC_EVENT_COAL_INDEX   = 0x0,
 512         CNIC_SEND_DOORBELL      = 0x4,
 513         CNIC_EVENT_CQ_ARM       = 0x7,
 514         CNIC_RECV_DOORBELL      = 0x8
 515 #elif defined(__BIG_ENDIAN)
 516         CNIC_EVENT_COAL_INDEX   = 0x2,
 517         CNIC_SEND_DOORBELL      = 0x6,
 518         CNIC_EVENT_CQ_ARM       = 0x4,
 519         CNIC_RECV_DOORBELL      = 0xa
 520 #endif
 521 };
 522
 523
 524 /*
 525  * CQ DB
 526  */
 527 struct bnx2x_iscsi_cq_pend_cmpl {
 528         /* CQ producer, updated by Ustorm */
 529         u16 ustrom_prod;
 530         /* CQ pending completion counter */
 531         u16 pend_cntr;
 532 };
 533
 534
 535 struct bnx2i_5771x_cq_db {
 536         struct bnx2x_iscsi_cq_pend_cmpl qp_pend_cmpl[BNX2X_MAX_CQS];
 537         /* CQ pending completion ITT array */
 538         u16 itt[BNX2X_MAX_CQS];
 539         /* Cstorm CQ sequence to notify array, updated by driver */;
 540         u16 sqn[BNX2X_MAX_CQS];
 541         u32 reserved[4] /* 16 byte allignment */;
 542 };
 543
 544
 545 struct bnx2i_5771x_sq_rq_db {
 546         u16 prod_idx;
 547         u8 reserved0[62]; /* Pad structure size to 64 bytes */
 548 };
 549
 550
 551 struct bnx2i_5771x_dbell_hdr {
 552         u8 header;
 553         /* 1 for rx doorbell, 0 for tx doorbell */
 554 #define B577XX_DOORBELL_HDR_RX                          (0x1<<0)
 555 #define B577XX_DOORBELL_HDR_RX_SHIFT                    0
 556         /* 0 for normal doorbell, 1 for advertise wnd doorbell */
 557 #define B577XX_DOORBELL_HDR_DB_TYPE                     (0x1<<1)
 558 #define B577XX_DOORBELL_HDR_DB_TYPE_SHIFT               1
 559         /* rdma tx only: DPM transaction size specifier (64/128/256/512B) */
 560 #define B577XX_DOORBELL_HDR_DPM_SIZE                    (0x3<<2)
 561 #define B577XX_DOORBELL_HDR_DPM_SIZE_SHIFT              2
 562         /* connection type */
 563 #define B577XX_DOORBELL_HDR_CONN_TYPE                   (0xF<<4)
 564 #define B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT             4
 565 };
 566
 567 struct bnx2i_5771x_dbell {
 568         struct bnx2i_5771x_dbell_hdr dbell;
 569         u8 pad[3];
 570
 571 };
 572
 573 /**
 574  * struct qp_info - QP (share queue region) atrributes structure
 575  *
 576  * @ctx_base:           ioremapped pci register base to access doorbell register
 577  *                      pertaining to this offloaded connection
 578  * @sq_virt:            virtual address of send queue (SQ) region
 579  * @sq_phys:            DMA address of SQ memory region
 580  * @sq_mem_size:        SQ size
 581  * @sq_prod_qe:         SQ producer entry pointer
 582  * @sq_cons_qe:         SQ consumer entry pointer
 583  * @sq_first_qe:        virtaul address of first entry in SQ
 584  * @sq_last_qe:         virtaul address of last entry in SQ
 585  * @sq_prod_idx:        SQ producer index
 586  * @sq_cons_idx:        SQ consumer index
 587  * @sqe_left:           number sq entry left
 588  * @sq_pgtbl_virt:      page table describing buffer consituting SQ region
 589  * @sq_pgtbl_phys:      dma address of 'sq_pgtbl_virt'
 590  * @sq_pgtbl_size:      SQ page table size
 591  * @cq_virt:            virtual address of completion queue (CQ) region
 592  * @cq_phys:            DMA address of RQ memory region
 593  * @cq_mem_size:        CQ size
 594  * @cq_prod_qe:         CQ producer entry pointer
 595  * @cq_cons_qe:         CQ consumer entry pointer
 596  * @cq_first_qe:        virtaul address of first entry in CQ
 597  * @cq_last_qe:         virtaul address of last entry in CQ
 598  * @cq_prod_idx:        CQ producer index
 599  * @cq_cons_idx:        CQ consumer index
 600  * @cqe_left:           number cq entry left
 601  * @cqe_size:           size of each CQ entry
 602  * @cqe_exp_seq_sn:     next expected CQE sequence number
 603  * @cq_pgtbl_virt:      page table describing buffer consituting CQ region
 604  * @cq_pgtbl_phys:      dma address of 'cq_pgtbl_virt'
 605  * @cq_pgtbl_size:      CQ page table size
 606  * @rq_virt:            virtual address of receive queue (RQ) region
 607  * @rq_phys:            DMA address of RQ memory region
 608  * @rq_mem_size:        RQ size
 609  * @rq_prod_qe:         RQ producer entry pointer
 610  * @rq_cons_qe:         RQ consumer entry pointer
 611  * @rq_first_qe:        virtaul address of first entry in RQ
 612  * @rq_last_qe:         virtaul address of last entry in RQ
 613  * @rq_prod_idx:        RQ producer index
 614  * @rq_cons_idx:        RQ consumer index
 615  * @rqe_left:           number rq entry left
 616  * @rq_pgtbl_virt:      page table describing buffer consituting RQ region
 617  * @rq_pgtbl_phys:      dma address of 'rq_pgtbl_virt'
 618  * @rq_pgtbl_size:      RQ page table size
 619  *
 620  * queue pair (QP) is a per connection shared data structure which is used
 621  *      to send work requests (SQ), receive completion notifications (CQ)
 622  *      and receive asynchoronous / scsi sense info (RQ). 'qp_info' structure
 623  *      below holds queue memory, consumer/producer indexes and page table
 624  *      information
 625  */
 626 struct qp_info {
 627         void __iomem *ctx_base;
 628 #define DPM_TRIGER_TYPE                 0x40
 629
 630 #define BNX2I_570x_QUE_DB_SIZE          0
 631 #define BNX2I_5771x_QUE_DB_SIZE         16
 632         struct sqe *sq_virt;
 633         dma_addr_t sq_phys;
 634         u32 sq_mem_size;
 635
 636         struct sqe *sq_prod_qe;
 637         struct sqe *sq_cons_qe;
 638         struct sqe *sq_first_qe;
 639         struct sqe *sq_last_qe;
 640         u16 sq_prod_idx;
 641         u16 sq_cons_idx;
 642         u32 sqe_left;
 643
 644         void *sq_pgtbl_virt;
 645         dma_addr_t sq_pgtbl_phys;
 646         u32 sq_pgtbl_size;      /* set to PAGE_SIZE for 5708 & 5709 */
 647
 648         struct cqe *cq_virt;
 649         dma_addr_t cq_phys;
 650         u32 cq_mem_size;
 651
 652         struct cqe *cq_prod_qe;
 653         struct cqe *cq_cons_qe;
 654         struct cqe *cq_first_qe;
 655         struct cqe *cq_last_qe;
 656         u16 cq_prod_idx;
 657         u16 cq_cons_idx;
 658         u32 cqe_left;
 659         u32 cqe_size;
 660         u32 cqe_exp_seq_sn;
 661
 662         void *cq_pgtbl_virt;
 663         dma_addr_t cq_pgtbl_phys;
 664         u32 cq_pgtbl_size;      /* set to PAGE_SIZE for 5708 & 5709 */
 665
 666         struct rqe *rq_virt;
 667         dma_addr_t rq_phys;
 668         u32 rq_mem_size;
 669
 670         struct rqe *rq_prod_qe;
 671         struct rqe *rq_cons_qe;
 672         struct rqe *rq_first_qe;
 673         struct rqe *rq_last_qe;
 674         u16 rq_prod_idx;
 675         u16 rq_cons_idx;
 676         u32 rqe_left;
 677
 678         void *rq_pgtbl_virt;
 679         dma_addr_t rq_pgtbl_phys;
 680         u32 rq_pgtbl_size;      /* set to PAGE_SIZE for 5708 & 5709 */
 681 };
 682
 683
 684
 685 /*
 686  * CID handles
 687  */
 688 struct ep_handles {
 689         u32 fw_cid;
 690         u32 drv_iscsi_cid;
 691         u16 pg_cid;
 692         u16 rsvd;
 693 };
 694
 695
 696 enum {
 697         EP_STATE_IDLE                   = 0x0,
 698         EP_STATE_PG_OFLD_START          = 0x1,
 699         EP_STATE_PG_OFLD_COMPL          = 0x2,
 700         EP_STATE_OFLD_START             = 0x4,
 701         EP_STATE_OFLD_COMPL             = 0x8,
 702         EP_STATE_CONNECT_START          = 0x10,
 703         EP_STATE_CONNECT_COMPL          = 0x20,
 704         EP_STATE_ULP_UPDATE_START       = 0x40,
 705         EP_STATE_ULP_UPDATE_COMPL       = 0x80,
 706         EP_STATE_DISCONN_START          = 0x100,
 707         EP_STATE_DISCONN_COMPL          = 0x200,
 708         EP_STATE_CLEANUP_START          = 0x400,
 709         EP_STATE_CLEANUP_CMPL           = 0x800,
 710         EP_STATE_TCP_FIN_RCVD           = 0x1000,
 711         EP_STATE_TCP_RST_RCVD           = 0x2000,
 712         EP_STATE_LOGOUT_SENT            = 0x4000,
 713         EP_STATE_LOGOUT_RESP_RCVD       = 0x8000,
 714         EP_STATE_PG_OFLD_FAILED         = 0x1000000,
 715         EP_STATE_ULP_UPDATE_FAILED      = 0x2000000,
 716         EP_STATE_CLEANUP_FAILED         = 0x4000000,
 717         EP_STATE_OFLD_FAILED            = 0x8000000,
 718         EP_STATE_CONNECT_FAILED         = 0x10000000,
 719         EP_STATE_DISCONN_TIMEDOUT       = 0x20000000,
 720         EP_STATE_OFLD_FAILED_CID_BUSY   = 0x80000000,
 721 };
 722
 723 /**
 724  * struct bnx2i_endpoint - representation of tcp connection in NX2 world
 725  *
 726  * @link:               list head to link elements
 727  * @hba:                adapter to which this connection belongs
 728  * @conn:               iscsi connection this EP is linked to
 729  * @cls_ep:             associated iSCSI endpoint pointer
 730  * @cm_sk:              cnic sock struct
 731  * @hba_age:            age to detect if 'iscsid' issues ep_disconnect()
 732  *                      after HBA reset is completed by bnx2i/cnic/bnx2
 733  *                      modules
 734  * @state:              tracks offload connection state machine
 735  * @timestamp:          tracks the start time when the ep begins to connect
 736  * @num_active_cmds:    tracks the number of outstanding commands for this ep
 737  * @ec_shift:           the amount of shift as part of the event coal calc
 738  * @qp:                 QP information
 739  * @ids:                contains chip allocated *context id* & driver assigned
 740  *                      *iscsi cid*
 741  * @ofld_timer:         offload timer to detect timeout
 742  * @ofld_wait:          wait queue
 743  *
 744  * Endpoint Structure - equivalent of tcp socket structure
 745  */
 746 struct bnx2i_endpoint {
 747         struct list_head link;
 748         struct bnx2i_hba *hba;
 749         struct bnx2i_conn *conn;
 750         struct iscsi_endpoint *cls_ep;
 751         struct cnic_sock *cm_sk;
 752         u32 hba_age;
 753         u32 state;
 754         unsigned long timestamp;
 755         atomic_t num_active_cmds;
 756         u32 ec_shift;
 757
 758         struct qp_info qp;
 759         struct ep_handles ids;
 760                 #define ep_iscsi_cid    ids.drv_iscsi_cid
 761                 #define ep_cid          ids.fw_cid
 762                 #define ep_pg_cid       ids.pg_cid
 763         struct timer_list ofld_timer;
 764         wait_queue_head_t ofld_wait;
 765 };
 766
 767
 768 struct bnx2i_work {
 769         struct list_head list;
 770         struct iscsi_session *session;
 771         struct bnx2i_conn *bnx2i_conn;
 772         struct cqe cqe;
 773 };
 774
 775 struct bnx2i_percpu_s {
 776         struct task_struct *iothread;
 777         struct list_head work_list;
 778         spinlock_t p_work_lock;
 779 };
 780
 781
 782 /* Global variables */
 783 extern unsigned int error_mask1, error_mask2;
 784 extern u64 iscsi_error_mask;
 785 extern unsigned int en_tcp_dack;
 786 extern unsigned int event_coal_div;
 787 extern unsigned int event_coal_min;
 788
 789 extern struct scsi_transport_template *bnx2i_scsi_xport_template;
 790 extern struct iscsi_transport bnx2i_iscsi_transport;
 791 extern struct cnic_ulp_ops bnx2i_cnic_cb;
 792
 793 extern unsigned int sq_size;
 794 extern unsigned int rq_size;
 795
 796 extern struct device_attribute *bnx2i_dev_attributes[];
 797
 798
 799
 800 /*
 801  * Function Prototypes
 802  */
 803 extern void bnx2i_identify_device(struct bnx2i_hba *hba);
 804
 805 extern void bnx2i_ulp_init(struct cnic_dev *dev);
 806 extern void bnx2i_ulp_exit(struct cnic_dev *dev);
 807 extern void bnx2i_start(void *handle);
 808 extern void bnx2i_stop(void *handle);
 809 extern int bnx2i_get_stats(void *handle);
 810
 811 extern struct bnx2i_hba *get_adapter_list_head(void);
 812
 813 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
 814                                           u16 iscsi_cid);
 815
 816 int bnx2i_alloc_ep_pool(void);
 817 void bnx2i_release_ep_pool(void);
 818 struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba);
 819 struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba);
 820
 821 struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic);
 822
 823 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic);
 824 void bnx2i_free_hba(struct bnx2i_hba *hba);
 825
 826 void bnx2i_get_rq_buf(struct bnx2i_conn *conn, char *ptr, int len);
 827 void bnx2i_put_rq_buf(struct bnx2i_conn *conn, int count);
 828
 829 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd);
 830
 831 void bnx2i_drop_session(struct iscsi_cls_session *session);
 832
 833 extern int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba);
 834 extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn,
 835                                   struct iscsi_task *mtask);
 836 extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn,
 837                                   struct iscsi_task *mtask);
 838 extern int bnx2i_send_iscsi_text(struct bnx2i_conn *conn,
 839                                  struct iscsi_task *mtask);
 840 extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn,
 841                                     struct bnx2i_cmd *cmnd);
 842 extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn,
 843                                    struct iscsi_task *mtask,
 844                                    char *datap, int data_len, int unsol);
 845 extern int bnx2i_send_iscsi_logout(struct bnx2i_conn *conn,
 846                                    struct iscsi_task *mtask);
 847 extern void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba,
 848                                        struct bnx2i_cmd *cmd);
 849 extern int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba,
 850                                     struct bnx2i_endpoint *ep);
 851 extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn);
 852 extern int bnx2i_send_conn_destroy(struct bnx2i_hba *hba,
 853                                    struct bnx2i_endpoint *ep);
 854
 855 extern int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba,
 856                                struct bnx2i_endpoint *ep);
 857 extern void bnx2i_free_qp_resc(struct bnx2i_hba *hba,
 858                                struct bnx2i_endpoint *ep);
 859 extern void bnx2i_ep_ofld_timer(unsigned long data);
 860 extern struct bnx2i_endpoint *bnx2i_find_ep_in_ofld_list(
 861                 struct bnx2i_hba *hba, u32 iscsi_cid);
 862 extern struct bnx2i_endpoint *bnx2i_find_ep_in_destroy_list(
 863                 struct bnx2i_hba *hba, u32 iscsi_cid);
 864
 865 extern int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep);
 866 extern int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action);
 867
 868 extern int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep);
 869
 870 /* Debug related function prototypes */
 871 extern void bnx2i_print_pend_cmd_queue(struct bnx2i_conn *conn);
 872 extern void bnx2i_print_active_cmd_queue(struct bnx2i_conn *conn);
 873 extern void bnx2i_print_xmit_pdu_queue(struct bnx2i_conn *conn);
 874 extern void bnx2i_print_recv_state(struct bnx2i_conn *conn);
 875
 876 extern int bnx2i_percpu_io_thread(void *arg);
 877 extern int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
 878                                        struct bnx2i_conn *bnx2i_conn,
 879                                        struct cqe *cqe);
 880 #endif