linux/drivers/scsi/bnx2i/bnx2i_iscsi.c
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   1/*
   2 * bnx2i_iscsi.c: QLogic NetXtreme II iSCSI driver.
   3 *
   4 * Copyright (c) 2006 - 2013 Broadcom Corporation
   5 * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
   6 * Copyright (c) 2007, 2008 Mike Christie
   7 * Copyright (c) 2014, QLogic Corporation
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License as published by
  11 * the Free Software Foundation.
  12 *
  13 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
  14 * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)
  15 * Maintained by: QLogic-Storage-Upstream@qlogic.com
  16 */
  17
  18#include <linux/slab.h>
  19#include <scsi/scsi_tcq.h>
  20#include <scsi/libiscsi.h>
  21#include "bnx2i.h"
  22
  23struct scsi_transport_template *bnx2i_scsi_xport_template;
  24struct iscsi_transport bnx2i_iscsi_transport;
  25static struct scsi_host_template bnx2i_host_template;
  26
  27/*
  28 * Global endpoint resource info
  29 */
  30static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
  31
  32DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
  33
  34static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
  35{
  36        int retval = 0;
  37
  38        if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
  39            test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
  40            test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
  41                retval = -EPERM;
  42        return retval;
  43}
  44
  45/**
  46 * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
  47 * @cmd:                iscsi cmd struct pointer
  48 * @buf_off:            absolute buffer offset
  49 * @start_bd_off:       u32 pointer to return the offset within the BD
  50 *                      indicated by 'start_bd_idx' on which 'buf_off' falls
  51 * @start_bd_idx:       index of the BD on which 'buf_off' falls
  52 *
  53 * identifies & marks various bd info for scsi command's imm data,
  54 * unsolicited data and the first solicited data seq.
  55 */
  56static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
  57                                       u32 *start_bd_off, u32 *start_bd_idx)
  58{
  59        struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
  60        u32 cur_offset = 0;
  61        u32 cur_bd_idx = 0;
  62
  63        if (buf_off) {
  64                while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
  65                        cur_offset += bd_tbl->buffer_length;
  66                        cur_bd_idx++;
  67                        bd_tbl++;
  68                }
  69        }
  70
  71        *start_bd_off = buf_off - cur_offset;
  72        *start_bd_idx = cur_bd_idx;
  73}
  74
  75/**
  76 * bnx2i_setup_write_cmd_bd_info - sets up BD various information
  77 * @task:       transport layer's cmd struct pointer
  78 *
  79 * identifies & marks various bd info for scsi command's immediate data,
  80 * unsolicited data and first solicited data seq which includes BD start
  81 * index & BD buf off. his function takes into account iscsi parameter such
  82 * as immediate data and unsolicited data is support on this connection.
  83 */
  84static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
  85{
  86        struct bnx2i_cmd *cmd = task->dd_data;
  87        u32 start_bd_offset;
  88        u32 start_bd_idx;
  89        u32 buffer_offset = 0;
  90        u32 cmd_len = cmd->req.total_data_transfer_length;
  91
  92        /* if ImmediateData is turned off & IntialR2T is turned on,
  93         * there will be no immediate or unsolicited data, just return.
  94         */
  95        if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
  96                return;
  97
  98        /* Immediate data */
  99        buffer_offset += task->imm_count;
 100        if (task->imm_count == cmd_len)
 101                return;
 102
 103        if (iscsi_task_has_unsol_data(task)) {
 104                bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
 105                                           &start_bd_offset, &start_bd_idx);
 106                cmd->req.ud_buffer_offset = start_bd_offset;
 107                cmd->req.ud_start_bd_index = start_bd_idx;
 108                buffer_offset += task->unsol_r2t.data_length;
 109        }
 110
 111        if (buffer_offset != cmd_len) {
 112                bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
 113                                           &start_bd_offset, &start_bd_idx);
 114                if ((start_bd_offset > task->conn->session->first_burst) ||
 115                    (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
 116                        int i = 0;
 117
 118                        iscsi_conn_printk(KERN_ALERT, task->conn,
 119                                          "bnx2i- error, buf offset 0x%x "
 120                                          "bd_valid %d use_sg %d\n",
 121                                          buffer_offset, cmd->io_tbl.bd_valid,
 122                                          scsi_sg_count(cmd->scsi_cmd));
 123                        for (i = 0; i < cmd->io_tbl.bd_valid; i++)
 124                                iscsi_conn_printk(KERN_ALERT, task->conn,
 125                                                  "bnx2i err, bd[%d]: len %x\n",
 126                                                  i, cmd->io_tbl.bd_tbl[i].\
 127                                                  buffer_length);
 128                }
 129                cmd->req.sd_buffer_offset = start_bd_offset;
 130                cmd->req.sd_start_bd_index = start_bd_idx;
 131        }
 132}
 133
 134
 135
 136/**
 137 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
 138 * @hba:        adapter instance
 139 * @cmd:        iscsi cmd struct pointer
 140 *
 141 * map SG list
 142 */
 143static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
 144{
 145        struct scsi_cmnd *sc = cmd->scsi_cmd;
 146        struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
 147        struct scatterlist *sg;
 148        int byte_count = 0;
 149        int bd_count = 0;
 150        int sg_count;
 151        int sg_len;
 152        u64 addr;
 153        int i;
 154
 155        BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
 156
 157        sg_count = scsi_dma_map(sc);
 158
 159        scsi_for_each_sg(sc, sg, sg_count, i) {
 160                sg_len = sg_dma_len(sg);
 161                addr = (u64) sg_dma_address(sg);
 162                bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
 163                bd[bd_count].buffer_addr_hi = addr >> 32;
 164                bd[bd_count].buffer_length = sg_len;
 165                bd[bd_count].flags = 0;
 166                if (bd_count == 0)
 167                        bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
 168
 169                byte_count += sg_len;
 170                bd_count++;
 171        }
 172
 173        if (bd_count)
 174                bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
 175
 176        BUG_ON(byte_count != scsi_bufflen(sc));
 177        return bd_count;
 178}
 179
 180/**
 181 * bnx2i_iscsi_map_sg_list - maps SG list
 182 * @cmd:        iscsi cmd struct pointer
 183 *
 184 * creates BD list table for the command
 185 */
 186static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
 187{
 188        int bd_count;
 189
 190        bd_count  = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
 191        if (!bd_count) {
 192                struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
 193
 194                bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
 195                bd[0].buffer_length = bd[0].flags = 0;
 196        }
 197        cmd->io_tbl.bd_valid = bd_count;
 198}
 199
 200
 201/**
 202 * bnx2i_iscsi_unmap_sg_list - unmaps SG list
 203 * @cmd:        iscsi cmd struct pointer
 204 *
 205 * unmap IO buffers and invalidate the BD table
 206 */
 207void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
 208{
 209        struct scsi_cmnd *sc = cmd->scsi_cmd;
 210
 211        if (cmd->io_tbl.bd_valid && sc) {
 212                scsi_dma_unmap(sc);
 213                cmd->io_tbl.bd_valid = 0;
 214        }
 215}
 216
 217static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
 218{
 219        memset(&cmd->req, 0x00, sizeof(cmd->req));
 220        cmd->req.op_code = 0xFF;
 221        cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
 222        cmd->req.bd_list_addr_hi =
 223                (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
 224
 225}
 226
 227
 228/**
 229 * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
 230 * @hba:        pointer to adapter instance
 231 * @conn:       pointer to iscsi connection
 232 * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
 233 *
 234 * update iscsi cid table entry with connection pointer. This enables
 235 *      driver to quickly get hold of connection structure pointer in
 236 *      completion/interrupt thread using iscsi context ID
 237 */
 238static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
 239                                        struct bnx2i_conn *bnx2i_conn,
 240                                        u32 iscsi_cid)
 241{
 242        if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
 243                iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
 244                                 "conn bind - entry #%d not free\n", iscsi_cid);
 245                return -EBUSY;
 246        }
 247
 248        hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
 249        return 0;
 250}
 251
 252
 253/**
 254 * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
 255 * @hba:        pointer to adapter instance
 256 * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
 257 */
 258struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
 259                                          u16 iscsi_cid)
 260{
 261        if (!hba->cid_que.conn_cid_tbl) {
 262                printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
 263                return NULL;
 264
 265        } else if (iscsi_cid >= hba->max_active_conns) {
 266                printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
 267                return NULL;
 268        }
 269        return hba->cid_que.conn_cid_tbl[iscsi_cid];
 270}
 271
 272
 273/**
 274 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
 275 * @hba:        pointer to adapter instance
 276 */
 277static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
 278{
 279        int idx;
 280
 281        if (!hba->cid_que.cid_free_cnt)
 282                return -1;
 283
 284        idx = hba->cid_que.cid_q_cons_idx;
 285        hba->cid_que.cid_q_cons_idx++;
 286        if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
 287                hba->cid_que.cid_q_cons_idx = 0;
 288
 289        hba->cid_que.cid_free_cnt--;
 290        return hba->cid_que.cid_que[idx];
 291}
 292
 293
 294/**
 295 * bnx2i_free_iscsi_cid - returns tcp port to free list
 296 * @hba:                pointer to adapter instance
 297 * @iscsi_cid:          iscsi context ID to free
 298 */
 299static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
 300{
 301        int idx;
 302
 303        if (iscsi_cid == (u16) -1)
 304                return;
 305
 306        hba->cid_que.cid_free_cnt++;
 307
 308        idx = hba->cid_que.cid_q_prod_idx;
 309        hba->cid_que.cid_que[idx] = iscsi_cid;
 310        hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
 311        hba->cid_que.cid_q_prod_idx++;
 312        if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
 313                hba->cid_que.cid_q_prod_idx = 0;
 314}
 315
 316
 317/**
 318 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
 319 * @hba:        pointer to adapter instance
 320 *
 321 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
 322 *      and initialize table attributes
 323 */
 324static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
 325{
 326        int mem_size;
 327        int i;
 328
 329        mem_size = hba->max_active_conns * sizeof(u32);
 330        mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 331
 332        hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
 333        if (!hba->cid_que.cid_que_base)
 334                return -ENOMEM;
 335
 336        mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
 337        mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 338        hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
 339        if (!hba->cid_que.conn_cid_tbl) {
 340                kfree(hba->cid_que.cid_que_base);
 341                hba->cid_que.cid_que_base = NULL;
 342                return -ENOMEM;
 343        }
 344
 345        hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
 346        hba->cid_que.cid_q_prod_idx = 0;
 347        hba->cid_que.cid_q_cons_idx = 0;
 348        hba->cid_que.cid_q_max_idx = hba->max_active_conns;
 349        hba->cid_que.cid_free_cnt = hba->max_active_conns;
 350
 351        for (i = 0; i < hba->max_active_conns; i++) {
 352                hba->cid_que.cid_que[i] = i;
 353                hba->cid_que.conn_cid_tbl[i] = NULL;
 354        }
 355        return 0;
 356}
 357
 358
 359/**
 360 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
 361 * @hba:        pointer to adapter instance
 362 */
 363static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
 364{
 365        kfree(hba->cid_que.cid_que_base);
 366        hba->cid_que.cid_que_base = NULL;
 367
 368        kfree(hba->cid_que.conn_cid_tbl);
 369        hba->cid_que.conn_cid_tbl = NULL;
 370}
 371
 372
 373/**
 374 * bnx2i_alloc_ep - allocates ep structure from global pool
 375 * @hba:        pointer to adapter instance
 376 *
 377 * routine allocates a free endpoint structure from global pool and
 378 *      a tcp port to be used for this connection.  Global resource lock,
 379 *      'bnx2i_resc_lock' is held while accessing shared global data structures
 380 */
 381static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
 382{
 383        struct iscsi_endpoint *ep;
 384        struct bnx2i_endpoint *bnx2i_ep;
 385        u32 ec_div;
 386
 387        ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
 388        if (!ep) {
 389                printk(KERN_ERR "bnx2i: Could not allocate ep\n");
 390                return NULL;
 391        }
 392
 393        bnx2i_ep = ep->dd_data;
 394        bnx2i_ep->cls_ep = ep;
 395        INIT_LIST_HEAD(&bnx2i_ep->link);
 396        bnx2i_ep->state = EP_STATE_IDLE;
 397        bnx2i_ep->ep_iscsi_cid = (u16) -1;
 398        bnx2i_ep->hba = hba;
 399        bnx2i_ep->hba_age = hba->age;
 400
 401        ec_div = event_coal_div;
 402        while (ec_div >>= 1)
 403                bnx2i_ep->ec_shift += 1;
 404
 405        hba->ofld_conns_active++;
 406        init_waitqueue_head(&bnx2i_ep->ofld_wait);
 407        return ep;
 408}
 409
 410
 411/**
 412 * bnx2i_free_ep - free endpoint
 413 * @ep:         pointer to iscsi endpoint structure
 414 */
 415static void bnx2i_free_ep(struct iscsi_endpoint *ep)
 416{
 417        struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
 418        unsigned long flags;
 419
 420        spin_lock_irqsave(&bnx2i_resc_lock, flags);
 421        bnx2i_ep->state = EP_STATE_IDLE;
 422        bnx2i_ep->hba->ofld_conns_active--;
 423
 424        if (bnx2i_ep->ep_iscsi_cid != (u16) -1)
 425                bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
 426
 427        if (bnx2i_ep->conn) {
 428                bnx2i_ep->conn->ep = NULL;
 429                bnx2i_ep->conn = NULL;
 430        }
 431
 432        bnx2i_ep->hba = NULL;
 433        spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
 434        iscsi_destroy_endpoint(ep);
 435}
 436
 437
 438/**
 439 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
 440 * @hba:        adapter instance pointer
 441 * @session:    iscsi session pointer
 442 * @cmd:        iscsi command structure
 443 */
 444static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
 445                           struct bnx2i_cmd *cmd)
 446{
 447        struct io_bdt *io = &cmd->io_tbl;
 448        struct iscsi_bd *bd;
 449
 450        io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
 451                                        ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
 452                                        &io->bd_tbl_dma, GFP_KERNEL);
 453        if (!io->bd_tbl) {
 454                iscsi_session_printk(KERN_ERR, session, "Could not "
 455                                     "allocate bdt.\n");
 456                return -ENOMEM;
 457        }
 458        io->bd_valid = 0;
 459        return 0;
 460}
 461
 462/**
 463 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
 464 * @hba:        adapter instance pointer
 465 * @session:    iscsi session pointer
 466 * @cmd:        iscsi command structure
 467 */
 468static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
 469                                   struct iscsi_session *session)
 470{
 471        int i;
 472
 473        for (i = 0; i < session->cmds_max; i++) {
 474                struct iscsi_task *task = session->cmds[i];
 475                struct bnx2i_cmd *cmd = task->dd_data;
 476
 477                if (cmd->io_tbl.bd_tbl)
 478                        dma_free_coherent(&hba->pcidev->dev,
 479                                          ISCSI_MAX_BDS_PER_CMD *
 480                                          sizeof(struct iscsi_bd),
 481                                          cmd->io_tbl.bd_tbl,
 482                                          cmd->io_tbl.bd_tbl_dma);
 483        }
 484
 485}
 486
 487
 488/**
 489 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
 490 * @hba:        adapter instance pointer
 491 * @session:    iscsi session pointer
 492 */
 493static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
 494                                struct iscsi_session *session)
 495{
 496        int i;
 497
 498        for (i = 0; i < session->cmds_max; i++) {
 499                struct iscsi_task *task = session->cmds[i];
 500                struct bnx2i_cmd *cmd = task->dd_data;
 501
 502                task->hdr = &cmd->hdr;
 503                task->hdr_max = sizeof(struct iscsi_hdr);
 504
 505                if (bnx2i_alloc_bdt(hba, session, cmd))
 506                        goto free_bdts;
 507        }
 508
 509        return 0;
 510
 511free_bdts:
 512        bnx2i_destroy_cmd_pool(hba, session);
 513        return -ENOMEM;
 514}
 515
 516
 517/**
 518 * bnx2i_setup_mp_bdt - allocate BD table resources
 519 * @hba:        pointer to adapter structure
 520 *
 521 * Allocate memory for dummy buffer and associated BD
 522 * table to be used by middle path (MP) requests
 523 */
 524static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
 525{
 526        int rc = 0;
 527        struct iscsi_bd *mp_bdt;
 528        u64 addr;
 529
 530        hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 531                                            &hba->mp_bd_dma, GFP_KERNEL);
 532        if (!hba->mp_bd_tbl) {
 533                printk(KERN_ERR "unable to allocate Middle Path BDT\n");
 534                rc = -1;
 535                goto out;
 536        }
 537
 538        hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev,
 539                                               CNIC_PAGE_SIZE,
 540                                               &hba->dummy_buf_dma, GFP_KERNEL);
 541        if (!hba->dummy_buffer) {
 542                printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
 543                dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 544                                  hba->mp_bd_tbl, hba->mp_bd_dma);
 545                hba->mp_bd_tbl = NULL;
 546                rc = -1;
 547                goto out;
 548        }
 549
 550        mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
 551        addr = (unsigned long) hba->dummy_buf_dma;
 552        mp_bdt->buffer_addr_lo = addr & 0xffffffff;
 553        mp_bdt->buffer_addr_hi = addr >> 32;
 554        mp_bdt->buffer_length = CNIC_PAGE_SIZE;
 555        mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
 556                        ISCSI_BD_FIRST_IN_BD_CHAIN;
 557out:
 558        return rc;
 559}
 560
 561
 562/**
 563 * bnx2i_free_mp_bdt - releases ITT back to free pool
 564 * @hba:        pointer to adapter instance
 565 *
 566 * free MP dummy buffer and associated BD table
 567 */
 568static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
 569{
 570        if (hba->mp_bd_tbl) {
 571                dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 572                                  hba->mp_bd_tbl, hba->mp_bd_dma);
 573                hba->mp_bd_tbl = NULL;
 574        }
 575        if (hba->dummy_buffer) {
 576                dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 577                                  hba->dummy_buffer, hba->dummy_buf_dma);
 578                hba->dummy_buffer = NULL;
 579        }
 580        return;
 581}
 582
 583/**
 584 * bnx2i_drop_session - notifies iscsid of connection error.
 585 * @hba:        adapter instance pointer
 586 * @session:    iscsi session pointer
 587 *
 588 * This notifies iscsid that there is a error, so it can initiate
 589 * recovery.
 590 *
 591 * This relies on caller using the iscsi class iterator so the object
 592 * is refcounted and does not disapper from under us.
 593 */
 594void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
 595{
 596        iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
 597}
 598
 599/**
 600 * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
 601 * @hba:        pointer to adapter instance
 602 * @ep:         pointer to endpoint (transport identifier) structure
 603 *
 604 * EP destroy queue manager
 605 */
 606static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
 607                                     struct bnx2i_endpoint *ep)
 608{
 609        write_lock_bh(&hba->ep_rdwr_lock);
 610        list_add_tail(&ep->link, &hba->ep_destroy_list);
 611        write_unlock_bh(&hba->ep_rdwr_lock);
 612        return 0;
 613}
 614
 615/**
 616 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
 617 *
 618 * @hba:                pointer to adapter instance
 619 * @ep:                 pointer to endpoint (transport identifier) structure
 620 *
 621 * EP destroy queue manager
 622 */
 623static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
 624                                     struct bnx2i_endpoint *ep)
 625{
 626        write_lock_bh(&hba->ep_rdwr_lock);
 627        list_del_init(&ep->link);
 628        write_unlock_bh(&hba->ep_rdwr_lock);
 629
 630        return 0;
 631}
 632
 633/**
 634 * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
 635 * @hba:        pointer to adapter instance
 636 * @ep:         pointer to endpoint (transport identifier) structure
 637 *
 638 * pending conn offload completion queue manager
 639 */
 640static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
 641                                  struct bnx2i_endpoint *ep)
 642{
 643        write_lock_bh(&hba->ep_rdwr_lock);
 644        list_add_tail(&ep->link, &hba->ep_ofld_list);
 645        write_unlock_bh(&hba->ep_rdwr_lock);
 646        return 0;
 647}
 648
 649/**
 650 * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
 651 * @hba:                pointer to adapter instance
 652 * @ep:                 pointer to endpoint (transport identifier) structure
 653 *
 654 * pending conn offload completion queue manager
 655 */
 656static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
 657                                  struct bnx2i_endpoint *ep)
 658{
 659        write_lock_bh(&hba->ep_rdwr_lock);
 660        list_del_init(&ep->link);
 661        write_unlock_bh(&hba->ep_rdwr_lock);
 662        return 0;
 663}
 664
 665
 666/**
 667 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
 668 *
 669 * @hba:                pointer to adapter instance
 670 * @iscsi_cid:          iscsi context ID to find
 671 *
 672 */
 673struct bnx2i_endpoint *
 674bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
 675{
 676        struct list_head *list;
 677        struct list_head *tmp;
 678        struct bnx2i_endpoint *ep = NULL;
 679
 680        read_lock_bh(&hba->ep_rdwr_lock);
 681        list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
 682                ep = (struct bnx2i_endpoint *)list;
 683
 684                if (ep->ep_iscsi_cid == iscsi_cid)
 685                        break;
 686                ep = NULL;
 687        }
 688        read_unlock_bh(&hba->ep_rdwr_lock);
 689
 690        if (!ep)
 691                printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
 692        return ep;
 693}
 694
 695/**
 696 * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
 697 * @hba:                pointer to adapter instance
 698 * @iscsi_cid:          iscsi context ID to find
 699 *
 700 */
 701struct bnx2i_endpoint *
 702bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
 703{
 704        struct list_head *list;
 705        struct list_head *tmp;
 706        struct bnx2i_endpoint *ep = NULL;
 707
 708        read_lock_bh(&hba->ep_rdwr_lock);
 709        list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
 710                ep = (struct bnx2i_endpoint *)list;
 711
 712                if (ep->ep_iscsi_cid == iscsi_cid)
 713                        break;
 714                ep = NULL;
 715        }
 716        read_unlock_bh(&hba->ep_rdwr_lock);
 717
 718        if (!ep)
 719                printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
 720
 721        return ep;
 722}
 723
 724/**
 725 * bnx2i_ep_active_list_add - add an entry to ep active list
 726 * @hba:        pointer to adapter instance
 727 * @ep:         pointer to endpoint (transport identifier) structure
 728 *
 729 * current active conn queue manager
 730 */
 731static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,
 732                                     struct bnx2i_endpoint *ep)
 733{
 734        write_lock_bh(&hba->ep_rdwr_lock);
 735        list_add_tail(&ep->link, &hba->ep_active_list);
 736        write_unlock_bh(&hba->ep_rdwr_lock);
 737}
 738
 739
 740/**
 741 * bnx2i_ep_active_list_del - deletes an entry to ep active list
 742 * @hba:        pointer to adapter instance
 743 * @ep:         pointer to endpoint (transport identifier) structure
 744 *
 745 * current active conn queue manager
 746 */
 747static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba,
 748                                     struct bnx2i_endpoint *ep)
 749{
 750        write_lock_bh(&hba->ep_rdwr_lock);
 751        list_del_init(&ep->link);
 752        write_unlock_bh(&hba->ep_rdwr_lock);
 753}
 754
 755
 756/**
 757 * bnx2i_setup_host_queue_size - assigns shost->can_queue param
 758 * @hba:        pointer to adapter instance
 759 * @shost:      scsi host pointer
 760 *
 761 * Initializes 'can_queue' parameter based on how many outstanding commands
 762 *      the device can handle. Each device 5708/5709/57710 has different
 763 *      capabilities
 764 */
 765static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
 766                                        struct Scsi_Host *shost)
 767{
 768        if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
 769                shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
 770        else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
 771                shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
 772        else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
 773                shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
 774        else
 775                shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
 776}
 777
 778
 779/**
 780 * bnx2i_alloc_hba - allocate and init adapter instance
 781 * @cnic:       cnic device pointer
 782 *
 783 * allocate & initialize adapter structure and call other
 784 *      support routines to do per adapter initialization
 785 */
 786struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
 787{
 788        struct Scsi_Host *shost;
 789        struct bnx2i_hba *hba;
 790
 791        shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
 792        if (!shost)
 793                return NULL;
 794        shost->dma_boundary = cnic->pcidev->dma_mask;
 795        shost->transportt = bnx2i_scsi_xport_template;
 796        shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
 797        shost->max_channel = 0;
 798        shost->max_lun = 512;
 799        shost->max_cmd_len = 16;
 800
 801        hba = iscsi_host_priv(shost);
 802        hba->shost = shost;
 803        hba->netdev = cnic->netdev;
 804        /* Get PCI related information and update hba struct members */
 805        hba->pcidev = cnic->pcidev;
 806        pci_dev_get(hba->pcidev);
 807        hba->pci_did = hba->pcidev->device;
 808        hba->pci_vid = hba->pcidev->vendor;
 809        hba->pci_sdid = hba->pcidev->subsystem_device;
 810        hba->pci_svid = hba->pcidev->subsystem_vendor;
 811        hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
 812        hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
 813
 814        bnx2i_identify_device(hba, cnic);
 815        bnx2i_setup_host_queue_size(hba, shost);
 816
 817        hba->reg_base = pci_resource_start(hba->pcidev, 0);
 818        if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
 819                hba->regview = pci_iomap(hba->pcidev, 0, BNX2_MQ_CONFIG2);
 820                if (!hba->regview)
 821                        goto ioreg_map_err;
 822        } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 823                hba->regview = pci_iomap(hba->pcidev, 0, 4096);
 824                if (!hba->regview)
 825                        goto ioreg_map_err;
 826        }
 827
 828        if (bnx2i_setup_mp_bdt(hba))
 829                goto mp_bdt_mem_err;
 830
 831        INIT_LIST_HEAD(&hba->ep_ofld_list);
 832        INIT_LIST_HEAD(&hba->ep_active_list);
 833        INIT_LIST_HEAD(&hba->ep_destroy_list);
 834        rwlock_init(&hba->ep_rdwr_lock);
 835
 836        hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
 837
 838        /* different values for 5708/5709/57710 */
 839        hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
 840
 841        if (bnx2i_setup_free_cid_que(hba))
 842                goto cid_que_err;
 843
 844        /* SQ/RQ/CQ size can be changed via sysfx interface */
 845        if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 846                if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
 847                        hba->max_sqes = sq_size;
 848                else
 849                        hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
 850        } else {        /* 5706/5708/5709 */
 851                if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
 852                        hba->max_sqes = sq_size;
 853                else
 854                        hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
 855        }
 856
 857        hba->max_rqes = rq_size;
 858        hba->max_cqes = hba->max_sqes + rq_size;
 859        if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 860                if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
 861                        hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
 862        } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
 863                hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
 864
 865        hba->num_ccell = hba->max_sqes / 2;
 866
 867        spin_lock_init(&hba->lock);
 868        mutex_init(&hba->net_dev_lock);
 869        init_waitqueue_head(&hba->eh_wait);
 870        if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 871                hba->hba_shutdown_tmo = 30 * HZ;
 872                hba->conn_teardown_tmo = 20 * HZ;
 873                hba->conn_ctx_destroy_tmo = 6 * HZ;
 874        } else {        /* 5706/5708/5709 */
 875                hba->hba_shutdown_tmo = 20 * HZ;
 876                hba->conn_teardown_tmo = 10 * HZ;
 877                hba->conn_ctx_destroy_tmo = 2 * HZ;
 878        }
 879
 880#ifdef CONFIG_32BIT
 881        spin_lock_init(&hba->stat_lock);
 882#endif
 883        memset(&hba->stats, 0, sizeof(struct iscsi_stats_info));
 884
 885        if (iscsi_host_add(shost, &hba->pcidev->dev))
 886                goto free_dump_mem;
 887        return hba;
 888
 889free_dump_mem:
 890        bnx2i_release_free_cid_que(hba);
 891cid_que_err:
 892        bnx2i_free_mp_bdt(hba);
 893mp_bdt_mem_err:
 894        if (hba->regview) {
 895                pci_iounmap(hba->pcidev, hba->regview);
 896                hba->regview = NULL;
 897        }
 898ioreg_map_err:
 899        pci_dev_put(hba->pcidev);
 900        scsi_host_put(shost);
 901        return NULL;
 902}
 903
 904/**
 905 * bnx2i_free_hba- releases hba structure and resources held by the adapter
 906 * @hba:        pointer to adapter instance
 907 *
 908 * free adapter structure and call various cleanup routines.
 909 */
 910void bnx2i_free_hba(struct bnx2i_hba *hba)
 911{
 912        struct Scsi_Host *shost = hba->shost;
 913
 914        iscsi_host_remove(shost);
 915        INIT_LIST_HEAD(&hba->ep_ofld_list);
 916        INIT_LIST_HEAD(&hba->ep_active_list);
 917        INIT_LIST_HEAD(&hba->ep_destroy_list);
 918
 919        if (hba->regview) {
 920                pci_iounmap(hba->pcidev, hba->regview);
 921                hba->regview = NULL;
 922        }
 923        pci_dev_put(hba->pcidev);
 924        bnx2i_free_mp_bdt(hba);
 925        bnx2i_release_free_cid_que(hba);
 926        iscsi_host_free(shost);
 927}
 928
 929/**
 930 * bnx2i_conn_free_login_resources - free DMA resources used for login process
 931 * @hba:                pointer to adapter instance
 932 * @bnx2i_conn:         iscsi connection pointer
 933 *
 934 * Login related resources, mostly BDT & payload DMA memory is freed
 935 */
 936static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
 937                                            struct bnx2i_conn *bnx2i_conn)
 938{
 939        if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
 940                dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 941                                  bnx2i_conn->gen_pdu.resp_bd_tbl,
 942                                  bnx2i_conn->gen_pdu.resp_bd_dma);
 943                bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
 944        }
 945
 946        if (bnx2i_conn->gen_pdu.req_bd_tbl) {
 947                dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 948                                  bnx2i_conn->gen_pdu.req_bd_tbl,
 949                                  bnx2i_conn->gen_pdu.req_bd_dma);
 950                bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
 951        }
 952
 953        if (bnx2i_conn->gen_pdu.resp_buf) {
 954                dma_free_coherent(&hba->pcidev->dev,
 955                                  ISCSI_DEF_MAX_RECV_SEG_LEN,
 956                                  bnx2i_conn->gen_pdu.resp_buf,
 957                                  bnx2i_conn->gen_pdu.resp_dma_addr);
 958                bnx2i_conn->gen_pdu.resp_buf = NULL;
 959        }
 960
 961        if (bnx2i_conn->gen_pdu.req_buf) {
 962                dma_free_coherent(&hba->pcidev->dev,
 963                                  ISCSI_DEF_MAX_RECV_SEG_LEN,
 964                                  bnx2i_conn->gen_pdu.req_buf,
 965                                  bnx2i_conn->gen_pdu.req_dma_addr);
 966                bnx2i_conn->gen_pdu.req_buf = NULL;
 967        }
 968}
 969
 970/**
 971 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
 972 * @hba:                pointer to adapter instance
 973 * @bnx2i_conn:         iscsi connection pointer
 974 *
 975 * Mgmt task DNA resources are allocated in this routine.
 976 */
 977static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
 978                                            struct bnx2i_conn *bnx2i_conn)
 979{
 980        /* Allocate memory for login request/response buffers */
 981        bnx2i_conn->gen_pdu.req_buf =
 982                dma_alloc_coherent(&hba->pcidev->dev,
 983                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
 984                                   &bnx2i_conn->gen_pdu.req_dma_addr,
 985                                   GFP_KERNEL);
 986        if (bnx2i_conn->gen_pdu.req_buf == NULL)
 987                goto login_req_buf_failure;
 988
 989        bnx2i_conn->gen_pdu.req_buf_size = 0;
 990        bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
 991
 992        bnx2i_conn->gen_pdu.resp_buf =
 993                dma_alloc_coherent(&hba->pcidev->dev,
 994                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
 995                                   &bnx2i_conn->gen_pdu.resp_dma_addr,
 996                                   GFP_KERNEL);
 997        if (bnx2i_conn->gen_pdu.resp_buf == NULL)
 998                goto login_resp_buf_failure;
 999
1000        bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
1001        bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
1002
1003        bnx2i_conn->gen_pdu.req_bd_tbl =
1004                dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
1005                                   &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
1006        if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
1007                goto login_req_bd_tbl_failure;
1008
1009        bnx2i_conn->gen_pdu.resp_bd_tbl =
1010                dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
1011                                   &bnx2i_conn->gen_pdu.resp_bd_dma,
1012                                   GFP_KERNEL);
1013        if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
1014                goto login_resp_bd_tbl_failure;
1015
1016        return 0;
1017
1018login_resp_bd_tbl_failure:
1019        dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
1020                          bnx2i_conn->gen_pdu.req_bd_tbl,
1021                          bnx2i_conn->gen_pdu.req_bd_dma);
1022        bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
1023
1024login_req_bd_tbl_failure:
1025        dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1026                          bnx2i_conn->gen_pdu.resp_buf,
1027                          bnx2i_conn->gen_pdu.resp_dma_addr);
1028        bnx2i_conn->gen_pdu.resp_buf = NULL;
1029login_resp_buf_failure:
1030        dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1031                          bnx2i_conn->gen_pdu.req_buf,
1032                          bnx2i_conn->gen_pdu.req_dma_addr);
1033        bnx2i_conn->gen_pdu.req_buf = NULL;
1034login_req_buf_failure:
1035        iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
1036                          "login resource alloc failed!!\n");
1037        return -ENOMEM;
1038
1039}
1040
1041
1042/**
1043 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
1044 * @bnx2i_conn:         iscsi connection pointer
1045 *
1046 * Allocates buffers and BD tables before shipping requests to cnic
1047 *      for PDUs prepared by 'iscsid' daemon
1048 */
1049static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
1050{
1051        struct iscsi_bd *bd_tbl;
1052
1053        bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
1054
1055        bd_tbl->buffer_addr_hi =
1056                (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
1057        bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
1058        bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
1059                                bnx2i_conn->gen_pdu.req_buf;
1060        bd_tbl->reserved0 = 0;
1061        bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1062                        ISCSI_BD_FIRST_IN_BD_CHAIN;
1063
1064        bd_tbl = (struct iscsi_bd  *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1065        bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1066        bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1067        bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1068        bd_tbl->reserved0 = 0;
1069        bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1070                        ISCSI_BD_FIRST_IN_BD_CHAIN;
1071}
1072
1073
1074/**
1075 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1076 * @task:       transport layer task pointer
1077 *
1078 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1079 *      Nop-out and Logout requests flow through this path.
1080 */
1081static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1082{
1083        struct bnx2i_cmd *cmd = task->dd_data;
1084        struct bnx2i_conn *bnx2i_conn = cmd->conn;
1085        int rc = 0;
1086        char *buf;
1087        int data_len;
1088
1089        bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1090        switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1091        case ISCSI_OP_LOGIN:
1092                bnx2i_send_iscsi_login(bnx2i_conn, task);
1093                break;
1094        case ISCSI_OP_NOOP_OUT:
1095                data_len = bnx2i_conn->gen_pdu.req_buf_size;
1096                buf = bnx2i_conn->gen_pdu.req_buf;
1097                if (data_len)
1098                        rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1099                                                     buf, data_len, 1);
1100                else
1101                        rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1102                                                     NULL, 0, 1);
1103                break;
1104        case ISCSI_OP_LOGOUT:
1105                rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1106                break;
1107        case ISCSI_OP_SCSI_TMFUNC:
1108                rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1109                break;
1110        case ISCSI_OP_TEXT:
1111                rc = bnx2i_send_iscsi_text(bnx2i_conn, task);
1112                break;
1113        default:
1114                iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1115                                  "send_gen: unsupported op 0x%x\n",
1116                                  task->hdr->opcode);
1117        }
1118        return rc;
1119}
1120
1121
1122/**********************************************************************
1123 *              SCSI-ML Interface
1124 **********************************************************************/
1125
1126/**
1127 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1128 * @sc:         SCSI-ML command pointer
1129 * @cmd:        iscsi cmd pointer
1130 */
1131static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1132{
1133        u32 dword;
1134        int lpcnt;
1135        u8 *srcp;
1136        u32 *dstp;
1137        u32 scsi_lun[2];
1138
1139        int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1140        cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1141        cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1142
1143        lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1144        srcp = (u8 *) sc->cmnd;
1145        dstp = (u32 *) cmd->req.cdb;
1146        while (lpcnt--) {
1147                memcpy(&dword, (const void *) srcp, 4);
1148                *dstp = cpu_to_be32(dword);
1149                srcp += 4;
1150                dstp++;
1151        }
1152        if (sc->cmd_len & 0x3) {
1153                dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1154                *dstp = cpu_to_be32(dword);
1155        }
1156}
1157
1158static void bnx2i_cleanup_task(struct iscsi_task *task)
1159{
1160        struct iscsi_conn *conn = task->conn;
1161        struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1162        struct bnx2i_hba *hba = bnx2i_conn->hba;
1163
1164        /*
1165         * mgmt task or cmd was never sent to us to transmit.
1166         */
1167        if (!task->sc || task->state == ISCSI_TASK_PENDING)
1168                return;
1169        /*
1170         * need to clean-up task context to claim dma buffers
1171         */
1172        if (task->state == ISCSI_TASK_ABRT_TMF) {
1173                bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1174
1175                spin_unlock_bh(&conn->session->back_lock);
1176                spin_unlock_bh(&conn->session->frwd_lock);
1177                wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1178                                msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1179                spin_lock_bh(&conn->session->frwd_lock);
1180                spin_lock_bh(&conn->session->back_lock);
1181        }
1182        bnx2i_iscsi_unmap_sg_list(task->dd_data);
1183}
1184
1185/**
1186 * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1187 * @conn:       transport layer conn structure pointer
1188 * @task:       transport layer command structure pointer
1189 */
1190static int
1191bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1192{
1193        struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1194        struct bnx2i_hba *hba = bnx2i_conn->hba;
1195        struct bnx2i_cmd *cmd = task->dd_data;
1196
1197        memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1198
1199        bnx2i_setup_cmd_wqe_template(cmd);
1200        bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1201
1202        /* Tx PDU/data length count */
1203        ADD_STATS_64(hba, tx_pdus, 1);
1204        ADD_STATS_64(hba, tx_bytes, task->data_count);
1205
1206        if (task->data_count) {
1207                memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1208                       task->data_count);
1209                bnx2i_conn->gen_pdu.req_wr_ptr =
1210                        bnx2i_conn->gen_pdu.req_buf + task->data_count;
1211        }
1212        cmd->conn = conn->dd_data;
1213        cmd->scsi_cmd = NULL;
1214        return bnx2i_iscsi_send_generic_request(task);
1215}
1216
1217/**
1218 * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1219 * @task:       transport layer command structure pointer
1220 *
1221 * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1222 */
1223static int bnx2i_task_xmit(struct iscsi_task *task)
1224{
1225        struct iscsi_conn *conn = task->conn;
1226        struct iscsi_session *session = conn->session;
1227        struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1228        struct bnx2i_hba *hba = iscsi_host_priv(shost);
1229        struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1230        struct scsi_cmnd *sc = task->sc;
1231        struct bnx2i_cmd *cmd = task->dd_data;
1232        struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
1233
1234        if (atomic_read(&bnx2i_conn->ep->num_active_cmds) + 1  >
1235            hba->max_sqes)
1236                return -ENOMEM;
1237
1238        /*
1239         * If there is no scsi_cmnd this must be a mgmt task
1240         */
1241        if (!sc)
1242                return bnx2i_mtask_xmit(conn, task);
1243
1244        bnx2i_setup_cmd_wqe_template(cmd);
1245        cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1246        cmd->conn = bnx2i_conn;
1247        cmd->scsi_cmd = sc;
1248        cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1249        cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1250
1251        bnx2i_iscsi_map_sg_list(cmd);
1252        bnx2i_cpy_scsi_cdb(sc, cmd);
1253
1254        cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1255        if (sc->sc_data_direction == DMA_TO_DEVICE) {
1256                cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1257                cmd->req.itt = task->itt |
1258                        (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1259                bnx2i_setup_write_cmd_bd_info(task);
1260        } else {
1261                if (scsi_bufflen(sc))
1262                        cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1263                cmd->req.itt = task->itt |
1264                        (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1265        }
1266
1267        cmd->req.num_bds = cmd->io_tbl.bd_valid;
1268        if (!cmd->io_tbl.bd_valid) {
1269                cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1270                cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1271                cmd->req.num_bds = 1;
1272        }
1273
1274        bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1275        return 0;
1276}
1277
1278/**
1279 * bnx2i_session_create - create a new iscsi session
1280 * @cmds_max:           max commands supported
1281 * @qdepth:             scsi queue depth to support
1282 * @initial_cmdsn:      initial iscsi CMDSN to be used for this session
1283 *
1284 * Creates a new iSCSI session instance on given device.
1285 */
1286static struct iscsi_cls_session *
1287bnx2i_session_create(struct iscsi_endpoint *ep,
1288                     uint16_t cmds_max, uint16_t qdepth,
1289                     uint32_t initial_cmdsn)
1290{
1291        struct Scsi_Host *shost;
1292        struct iscsi_cls_session *cls_session;
1293        struct bnx2i_hba *hba;
1294        struct bnx2i_endpoint *bnx2i_ep;
1295
1296        if (!ep) {
1297                printk(KERN_ERR "bnx2i: missing ep.\n");
1298                return NULL;
1299        }
1300
1301        bnx2i_ep = ep->dd_data;
1302        shost = bnx2i_ep->hba->shost;
1303        hba = iscsi_host_priv(shost);
1304        if (bnx2i_adapter_ready(hba))
1305                return NULL;
1306
1307        /*
1308         * user can override hw limit as long as it is within
1309         * the min/max.
1310         */
1311        if (cmds_max > hba->max_sqes)
1312                cmds_max = hba->max_sqes;
1313        else if (cmds_max < BNX2I_SQ_WQES_MIN)
1314                cmds_max = BNX2I_SQ_WQES_MIN;
1315
1316        cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1317                                          cmds_max, 0, sizeof(struct bnx2i_cmd),
1318                                          initial_cmdsn, ISCSI_MAX_TARGET);
1319        if (!cls_session)
1320                return NULL;
1321
1322        if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1323                goto session_teardown;
1324        return cls_session;
1325
1326session_teardown:
1327        iscsi_session_teardown(cls_session);
1328        return NULL;
1329}
1330
1331
1332/**
1333 * bnx2i_session_destroy - destroys iscsi session
1334 * @cls_session:        pointer to iscsi cls session
1335 *
1336 * Destroys previously created iSCSI session instance and releases
1337 *      all resources held by it
1338 */
1339static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1340{
1341        struct iscsi_session *session = cls_session->dd_data;
1342        struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1343        struct bnx2i_hba *hba = iscsi_host_priv(shost);
1344
1345        bnx2i_destroy_cmd_pool(hba, session);
1346        iscsi_session_teardown(cls_session);
1347}
1348
1349
1350/**
1351 * bnx2i_conn_create - create iscsi connection instance
1352 * @cls_session:        pointer to iscsi cls session
1353 * @cid:                iscsi cid as per rfc (not NX2's CID terminology)
1354 *
1355 * Creates a new iSCSI connection instance for a given session
1356 */
1357static struct iscsi_cls_conn *
1358bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1359{
1360        struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1361        struct bnx2i_hba *hba = iscsi_host_priv(shost);
1362        struct bnx2i_conn *bnx2i_conn;
1363        struct iscsi_cls_conn *cls_conn;
1364        struct iscsi_conn *conn;
1365
1366        cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1367                                    cid);
1368        if (!cls_conn)
1369                return NULL;
1370        conn = cls_conn->dd_data;
1371
1372        bnx2i_conn = conn->dd_data;
1373        bnx2i_conn->cls_conn = cls_conn;
1374        bnx2i_conn->hba = hba;
1375
1376        atomic_set(&bnx2i_conn->work_cnt, 0);
1377
1378        /* 'ep' ptr will be assigned in bind() call */
1379        bnx2i_conn->ep = NULL;
1380        init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1381
1382        if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1383                iscsi_conn_printk(KERN_ALERT, conn,
1384                                  "conn_new: login resc alloc failed!!\n");
1385                goto free_conn;
1386        }
1387
1388        return cls_conn;
1389
1390free_conn:
1391        iscsi_conn_teardown(cls_conn);
1392        return NULL;
1393}
1394
1395/**
1396 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1397 * @cls_session:        pointer to iscsi cls session
1398 * @cls_conn:           pointer to iscsi cls conn
1399 * @transport_fd:       64-bit EP handle
1400 * @is_leading:         leading connection on this session?
1401 *
1402 * Binds together iSCSI session instance, iSCSI connection instance
1403 *      and the TCP connection. This routine returns error code if
1404 *      TCP connection does not belong on the device iSCSI sess/conn
1405 *      is bound
1406 */
1407static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1408                           struct iscsi_cls_conn *cls_conn,
1409                           uint64_t transport_fd, int is_leading)
1410{
1411        struct iscsi_conn *conn = cls_conn->dd_data;
1412        struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1413        struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1414        struct bnx2i_hba *hba = iscsi_host_priv(shost);
1415        struct bnx2i_endpoint *bnx2i_ep;
1416        struct iscsi_endpoint *ep;
1417        int ret_code;
1418
1419        ep = iscsi_lookup_endpoint(transport_fd);
1420        if (!ep)
1421                return -EINVAL;
1422        /*
1423         * Forcefully terminate all in progress connection recovery at the
1424         * earliest, either in bind(), send_pdu(LOGIN), or conn_start()
1425         */
1426        if (bnx2i_adapter_ready(hba))
1427                return -EIO;
1428
1429        bnx2i_ep = ep->dd_data;
1430        if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1431            (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1432                /* Peer disconnect via' FIN or RST */
1433                return -EINVAL;
1434
1435        if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1436                return -EINVAL;
1437
1438        if (bnx2i_ep->hba != hba) {
1439                /* Error - TCP connection does not belong to this device
1440                 */
1441                iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1442                                  "conn bind, ep=0x%p (%s) does not",
1443                                  bnx2i_ep, bnx2i_ep->hba->netdev->name);
1444                iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1445                                  "belong to hba (%s)\n",
1446                                  hba->netdev->name);
1447                return -EEXIST;
1448        }
1449        bnx2i_ep->conn = bnx2i_conn;
1450        bnx2i_conn->ep = bnx2i_ep;
1451        bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1452        bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1453
1454        ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1455                                                bnx2i_ep->ep_iscsi_cid);
1456
1457        /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1458         * driver needs to explicitly replenish RQ index during setup.
1459         */
1460        if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1461                bnx2i_put_rq_buf(bnx2i_conn, 0);
1462
1463        bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1464        return ret_code;
1465}
1466
1467
1468/**
1469 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1470 * @cls_conn:   pointer to iscsi cls conn
1471 *
1472 * Destroy an iSCSI connection instance and release memory resources held by
1473 *      this connection
1474 */
1475static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1476{
1477        struct iscsi_conn *conn = cls_conn->dd_data;
1478        struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1479        struct Scsi_Host *shost;
1480        struct bnx2i_hba *hba;
1481        struct bnx2i_work *work, *tmp;
1482        unsigned cpu = 0;
1483        struct bnx2i_percpu_s *p;
1484
1485        shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1486        hba = iscsi_host_priv(shost);
1487
1488        bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1489
1490        if (atomic_read(&bnx2i_conn->work_cnt)) {
1491                for_each_online_cpu(cpu) {
1492                        p = &per_cpu(bnx2i_percpu, cpu);
1493                        spin_lock_bh(&p->p_work_lock);
1494                        list_for_each_entry_safe(work, tmp,
1495                                                 &p->work_list, list) {
1496                                if (work->session == conn->session &&
1497                                    work->bnx2i_conn == bnx2i_conn) {
1498                                        list_del_init(&work->list);
1499                                        kfree(work);
1500                                        if (!atomic_dec_and_test(
1501                                                        &bnx2i_conn->work_cnt))
1502                                                break;
1503                                }
1504                        }
1505                        spin_unlock_bh(&p->p_work_lock);
1506                }
1507        }
1508
1509        iscsi_conn_teardown(cls_conn);
1510}
1511
1512
1513/**
1514 * bnx2i_ep_get_param - return iscsi ep parameter to caller
1515 * @ep:         pointer to iscsi endpoint
1516 * @param:      parameter type identifier
1517 * @buf:        buffer pointer
1518 *
1519 * returns iSCSI ep parameters
1520 */
1521static int bnx2i_ep_get_param(struct iscsi_endpoint *ep,
1522                              enum iscsi_param param, char *buf)
1523{
1524        struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
1525        struct bnx2i_hba *hba = bnx2i_ep->hba;
1526        int len = -ENOTCONN;
1527
1528        if (!hba)
1529                return -ENOTCONN;
1530
1531        switch (param) {
1532        case ISCSI_PARAM_CONN_PORT:
1533                mutex_lock(&hba->net_dev_lock);
1534                if (bnx2i_ep->cm_sk)
1535                        len = sprintf(buf, "%hu\n", bnx2i_ep->cm_sk->dst_port);
1536                mutex_unlock(&hba->net_dev_lock);
1537                break;
1538        case ISCSI_PARAM_CONN_ADDRESS:
1539                mutex_lock(&hba->net_dev_lock);
1540                if (bnx2i_ep->cm_sk)
1541                        len = sprintf(buf, "%pI4\n", &bnx2i_ep->cm_sk->dst_ip);
1542                mutex_unlock(&hba->net_dev_lock);
1543                break;
1544        default:
1545                return -ENOSYS;
1546        }
1547
1548        return len;
1549}
1550
1551/**
1552 * bnx2i_host_get_param - returns host (adapter) related parameters
1553 * @shost:      scsi host pointer
1554 * @param:      parameter type identifier
1555 * @buf:        buffer pointer
1556 */
1557static int bnx2i_host_get_param(struct Scsi_Host *shost,
1558                                enum iscsi_host_param param, char *buf)
1559{
1560        struct bnx2i_hba *hba = iscsi_host_priv(shost);
1561        int len = 0;
1562
1563        switch (param) {
1564        case ISCSI_HOST_PARAM_HWADDRESS:
1565                len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1566                break;
1567        case ISCSI_HOST_PARAM_NETDEV_NAME:
1568                len = sprintf(buf, "%s\n", hba->netdev->name);
1569                break;
1570        case ISCSI_HOST_PARAM_IPADDRESS: {
1571                struct list_head *active_list = &hba->ep_active_list;
1572
1573                read_lock_bh(&hba->ep_rdwr_lock);
1574                if (!list_empty(&hba->ep_active_list)) {
1575                        struct bnx2i_endpoint *bnx2i_ep;
1576                        struct cnic_sock *csk;
1577
1578                        bnx2i_ep = list_first_entry(active_list,
1579                                                    struct bnx2i_endpoint,
1580                                                    link);
1581                        csk = bnx2i_ep->cm_sk;
1582                        if (test_bit(SK_F_IPV6, &csk->flags))
1583                                len = sprintf(buf, "%pI6\n", csk->src_ip);
1584                        else
1585                                len = sprintf(buf, "%pI4\n", csk->src_ip);
1586                }
1587                read_unlock_bh(&hba->ep_rdwr_lock);
1588                break;
1589        }
1590        default:
1591                return iscsi_host_get_param(shost, param, buf);
1592        }
1593        return len;
1594}
1595
1596/**
1597 * bnx2i_conn_start - completes iscsi connection migration to FFP
1598 * @cls_conn:   pointer to iscsi cls conn
1599 *
1600 * last call in FFP migration to handover iscsi conn to the driver
1601 */
1602static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1603{
1604        struct iscsi_conn *conn = cls_conn->dd_data;
1605        struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1606
1607        bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1608        bnx2i_update_iscsi_conn(conn);
1609
1610        /*
1611         * this should normally not sleep for a long time so it should
1612         * not disrupt the caller.
1613         */
1614        timer_setup(&bnx2i_conn->ep->ofld_timer, bnx2i_ep_ofld_timer, 0);
1615        bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1616        add_timer(&bnx2i_conn->ep->ofld_timer);
1617        /* update iSCSI context for this conn, wait for CNIC to complete */
1618        wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1619                        bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1620
1621        if (signal_pending(current))
1622                flush_signals(current);
1623        del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1624
1625        iscsi_conn_start(cls_conn);
1626        return 0;
1627}
1628
1629
1630/**
1631 * bnx2i_conn_get_stats - returns iSCSI stats
1632 * @cls_conn:   pointer to iscsi cls conn
1633 * @stats:      pointer to iscsi statistic struct
1634 */
1635static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1636                                 struct iscsi_stats *stats)
1637{
1638        struct iscsi_conn *conn = cls_conn->dd_data;
1639
1640        stats->txdata_octets = conn->txdata_octets;
1641        stats->rxdata_octets = conn->rxdata_octets;
1642        stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1643        stats->dataout_pdus = conn->dataout_pdus_cnt;
1644        stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1645        stats->datain_pdus = conn->datain_pdus_cnt;
1646        stats->r2t_pdus = conn->r2t_pdus_cnt;
1647        stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1648        stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1649        stats->digest_err = 0;
1650        stats->timeout_err = 0;
1651        strcpy(stats->custom[0].desc, "eh_abort_cnt");
1652        stats->custom[0].value = conn->eh_abort_cnt;
1653        stats->custom_length = 1;
1654}
1655
1656
1657/**
1658 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1659 * @dst_addr:   target IP address
1660 *
1661 * check if route resolves to BNX2 device
1662 */
1663static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1664{
1665        struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1666        struct bnx2i_hba *hba;
1667        struct cnic_dev *cnic = NULL;
1668
1669        hba = get_adapter_list_head();
1670        if (hba && hba->cnic)
1671                cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1672        if (!cnic) {
1673                printk(KERN_ALERT "bnx2i: no route,"
1674                       "can't connect using cnic\n");
1675                goto no_nx2_route;
1676        }
1677        hba = bnx2i_find_hba_for_cnic(cnic);
1678        if (!hba)
1679                goto no_nx2_route;
1680
1681        if (bnx2i_adapter_ready(hba)) {
1682                printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1683                goto no_nx2_route;
1684        }
1685        if (hba->netdev->mtu > hba->mtu_supported) {
1686                printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1687                                  hba->netdev->name, hba->netdev->mtu);
1688                printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1689                                  hba->mtu_supported);
1690                goto no_nx2_route;
1691        }
1692        return hba;
1693no_nx2_route:
1694        return NULL;
1695}
1696
1697
1698/**
1699 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1700 * @hba:        pointer to adapter instance
1701 * @ep:         endpoint (transport identifier) structure
1702 *
1703 * destroys cm_sock structure and on chip iscsi context
1704 */
1705static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1706                                 struct bnx2i_endpoint *ep)
1707{
1708        if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)
1709                hba->cnic->cm_destroy(ep->cm_sk);
1710
1711        if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1712            ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1713                if (ep->conn && ep->conn->cls_conn &&
1714                    ep->conn->cls_conn->dd_data) {
1715                        struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;
1716
1717                        /* Must suspend all rx queue activity for this ep */
1718                        set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
1719                }
1720                /* CONN_DISCONNECT timeout may or may not be an issue depending
1721                 * on what transcribed in TCP layer, different targets behave
1722                 * differently
1723                 */
1724                printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "
1725                                  "please submit GRC Dump, NW/PCIe trace, "
1726                                  "driver msgs to developers for analysis\n",
1727                                  hba->netdev->name);
1728        }
1729
1730        ep->state = EP_STATE_CLEANUP_START;
1731        timer_setup(&ep->ofld_timer, bnx2i_ep_ofld_timer, 0);
1732        ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
1733        add_timer(&ep->ofld_timer);
1734
1735        bnx2i_ep_destroy_list_add(hba, ep);
1736
1737        /* destroy iSCSI context, wait for it to complete */
1738        if (bnx2i_send_conn_destroy(hba, ep))
1739                ep->state = EP_STATE_CLEANUP_CMPL;
1740
1741        wait_event_interruptible(ep->ofld_wait,
1742                                 (ep->state != EP_STATE_CLEANUP_START));
1743
1744        if (signal_pending(current))
1745                flush_signals(current);
1746        del_timer_sync(&ep->ofld_timer);
1747
1748        bnx2i_ep_destroy_list_del(hba, ep);
1749
1750        if (ep->state != EP_STATE_CLEANUP_CMPL)
1751                /* should never happen */
1752                printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1753
1754        return 0;
1755}
1756
1757
1758/**
1759 * bnx2i_ep_connect - establish TCP connection to target portal
1760 * @shost:              scsi host
1761 * @dst_addr:           target IP address
1762 * @non_blocking:       blocking or non-blocking call
1763 *
1764 * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1765 *      with l5_core and the CNIC. This is a multi-step process of resolving
1766 *      route to target, create a iscsi connection context, handshaking with
1767 *      CNIC module to create/initialize the socket struct and finally
1768 *      sending down option-2 request to complete TCP 3-way handshake
1769 */
1770static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1771                                               struct sockaddr *dst_addr,
1772                                               int non_blocking)
1773{
1774        u32 iscsi_cid = BNX2I_CID_RESERVED;
1775        struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1776        struct sockaddr_in6 *desti6;
1777        struct bnx2i_endpoint *bnx2i_ep;
1778        struct bnx2i_hba *hba;
1779        struct cnic_dev *cnic;
1780        struct cnic_sockaddr saddr;
1781        struct iscsi_endpoint *ep;
1782        int rc = 0;
1783
1784        if (shost) {
1785                /* driver is given scsi host to work with */
1786                hba = iscsi_host_priv(shost);
1787        } else
1788                /*
1789                 * check if the given destination can be reached through
1790                 * a iscsi capable NetXtreme2 device
1791                 */
1792                hba = bnx2i_check_route(dst_addr);
1793
1794        if (!hba) {
1795                rc = -EINVAL;
1796                goto nohba;
1797        }
1798        mutex_lock(&hba->net_dev_lock);
1799
1800        if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) {
1801                rc = -EPERM;
1802                goto check_busy;
1803        }
1804        cnic = hba->cnic;
1805        ep = bnx2i_alloc_ep(hba);
1806        if (!ep) {
1807                rc = -ENOMEM;
1808                goto check_busy;
1809        }
1810        bnx2i_ep = ep->dd_data;
1811
1812        atomic_set(&bnx2i_ep->num_active_cmds, 0);
1813        iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1814        if (iscsi_cid == -1) {
1815                printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate "
1816                        "iscsi cid\n", hba->netdev->name);
1817                rc = -ENOMEM;
1818                bnx2i_free_ep(ep);
1819                goto check_busy;
1820        }
1821        bnx2i_ep->hba_age = hba->age;
1822
1823        rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1824        if (rc != 0) {
1825                printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error"
1826                        "\n", hba->netdev->name);
1827                rc = -ENOMEM;
1828                goto qp_resc_err;
1829        }
1830
1831        bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1832        bnx2i_ep->state = EP_STATE_OFLD_START;
1833        bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1834
1835        timer_setup(&bnx2i_ep->ofld_timer, bnx2i_ep_ofld_timer, 0);
1836        bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1837        add_timer(&bnx2i_ep->ofld_timer);
1838
1839        if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) {
1840                if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1841                        printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1842                                hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1843                        rc = -EBUSY;
1844                } else
1845                        rc = -ENOSPC;
1846                printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe"
1847                        "\n", hba->netdev->name);
1848                bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1849                goto conn_failed;
1850        }
1851
1852        /* Wait for CNIC hardware to setup conn context and return 'cid' */
1853        wait_event_interruptible(bnx2i_ep->ofld_wait,
1854                                 bnx2i_ep->state != EP_STATE_OFLD_START);
1855
1856        if (signal_pending(current))
1857                flush_signals(current);
1858        del_timer_sync(&bnx2i_ep->ofld_timer);
1859
1860        bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1861
1862        if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1863                if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1864                        printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1865                                hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1866                        rc = -EBUSY;
1867                } else
1868                        rc = -ENOSPC;
1869                goto conn_failed;
1870        }
1871
1872        rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1873                             iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1874        if (rc) {
1875                rc = -EINVAL;
1876                /* Need to terminate and cleanup the connection */
1877                goto release_ep;
1878        }
1879
1880        bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1881        bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1882        clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1883
1884        memset(&saddr, 0, sizeof(saddr));
1885        if (dst_addr->sa_family == AF_INET) {
1886                desti = (struct sockaddr_in *) dst_addr;
1887                saddr.remote.v4 = *desti;
1888                saddr.local.v4.sin_family = desti->sin_family;
1889        } else if (dst_addr->sa_family == AF_INET6) {
1890                desti6 = (struct sockaddr_in6 *) dst_addr;
1891                saddr.remote.v6 = *desti6;
1892                saddr.local.v6.sin6_family = desti6->sin6_family;
1893        }
1894
1895        bnx2i_ep->timestamp = jiffies;
1896        bnx2i_ep->state = EP_STATE_CONNECT_START;
1897        if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1898                rc = -EINVAL;
1899                goto conn_failed;
1900        } else
1901                rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1902        if (rc)
1903                goto release_ep;
1904
1905        bnx2i_ep_active_list_add(hba, bnx2i_ep);
1906
1907        rc = bnx2i_map_ep_dbell_regs(bnx2i_ep);
1908        if (rc)
1909                goto del_active_ep;
1910
1911        mutex_unlock(&hba->net_dev_lock);
1912        return ep;
1913
1914del_active_ep:
1915        bnx2i_ep_active_list_del(hba, bnx2i_ep);
1916release_ep:
1917        if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1918                mutex_unlock(&hba->net_dev_lock);
1919                return ERR_PTR(rc);
1920        }
1921conn_failed:
1922        bnx2i_free_qp_resc(hba, bnx2i_ep);
1923qp_resc_err:
1924        bnx2i_free_ep(ep);
1925check_busy:
1926        mutex_unlock(&hba->net_dev_lock);
1927nohba:
1928        return ERR_PTR(rc);
1929}
1930
1931
1932/**
1933 * bnx2i_ep_poll - polls for TCP connection establishement
1934 * @ep:                 TCP connection (endpoint) handle
1935 * @timeout_ms:         timeout value in milli secs
1936 *
1937 * polls for TCP connect request to complete
1938 */
1939static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1940{
1941        struct bnx2i_endpoint *bnx2i_ep;
1942        int rc = 0;
1943
1944        bnx2i_ep = ep->dd_data;
1945        if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1946            (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1947            (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1948                return -1;
1949        if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1950                return 1;
1951
1952        rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1953                                              ((bnx2i_ep->state ==
1954                                                EP_STATE_OFLD_FAILED) ||
1955                                               (bnx2i_ep->state ==
1956                                                EP_STATE_CONNECT_FAILED) ||
1957                                               (bnx2i_ep->state ==
1958                                                EP_STATE_CONNECT_COMPL)),
1959                                              msecs_to_jiffies(timeout_ms));
1960        if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
1961                rc = -1;
1962
1963        if (rc > 0)
1964                return 1;
1965        else if (!rc)
1966                return 0;       /* timeout */
1967        else
1968                return rc;
1969}
1970
1971
1972/**
1973 * bnx2i_ep_tcp_conn_active - check EP state transition
1974 * @ep:         endpoint pointer
1975 *
1976 * check if underlying TCP connection is active
1977 */
1978static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1979{
1980        int ret;
1981        int cnic_dev_10g = 0;
1982
1983        if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1984                cnic_dev_10g = 1;
1985
1986        switch (bnx2i_ep->state) {
1987        case EP_STATE_CLEANUP_FAILED:
1988        case EP_STATE_OFLD_FAILED:
1989        case EP_STATE_DISCONN_TIMEDOUT:
1990                ret = 0;
1991                break;
1992        case EP_STATE_CONNECT_START:
1993        case EP_STATE_CONNECT_FAILED:
1994        case EP_STATE_CONNECT_COMPL:
1995        case EP_STATE_ULP_UPDATE_START:
1996        case EP_STATE_ULP_UPDATE_COMPL:
1997        case EP_STATE_TCP_FIN_RCVD:
1998        case EP_STATE_LOGOUT_SENT:
1999        case EP_STATE_LOGOUT_RESP_RCVD:
2000        case EP_STATE_ULP_UPDATE_FAILED:
2001                ret = 1;
2002                break;
2003        case EP_STATE_TCP_RST_RCVD:
2004                if (cnic_dev_10g)
2005                        ret = 0;
2006                else
2007                        ret = 1;
2008                break;
2009        default:
2010                ret = 0;
2011        }
2012
2013        return ret;
2014}
2015
2016
2017/*
2018 * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
2019 * @ep:         TCP connection (bnx2i endpoint) handle
2020 *
2021 * executes  TCP connection teardown process
2022 */
2023int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
2024{
2025        struct bnx2i_hba *hba = bnx2i_ep->hba;
2026        struct cnic_dev *cnic;
2027        struct iscsi_session *session = NULL;
2028        struct iscsi_conn *conn = NULL;
2029        int ret = 0;
2030        int close = 0;
2031        int close_ret = 0;
2032
2033        if (!hba)
2034                return 0;
2035
2036        cnic = hba->cnic;
2037        if (!cnic)
2038                return 0;
2039
2040        if (bnx2i_ep->state == EP_STATE_IDLE ||
2041            bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2042                return 0;
2043
2044        if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
2045                goto destroy_conn;
2046
2047        if (bnx2i_ep->conn) {
2048                conn = bnx2i_ep->conn->cls_conn->dd_data;
2049                session = conn->session;
2050        }
2051
2052        timer_setup(&bnx2i_ep->ofld_timer, bnx2i_ep_ofld_timer, 0);
2053        bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
2054        add_timer(&bnx2i_ep->ofld_timer);
2055
2056        if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
2057                goto out;
2058
2059        if (session) {
2060                spin_lock_bh(&session->frwd_lock);
2061                if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
2062                        if (session->state == ISCSI_STATE_LOGGING_OUT) {
2063                                if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
2064                                        /* Logout sent, but no resp */
2065                                        printk(KERN_ALERT "bnx2i (%s): WARNING"
2066                                                " logout response was not "
2067                                                "received!\n",
2068                                                bnx2i_ep->hba->netdev->name);
2069                                } else if (bnx2i_ep->state ==
2070                                           EP_STATE_LOGOUT_RESP_RCVD)
2071                                        close = 1;
2072                        }
2073                } else
2074                        close = 1;
2075
2076                spin_unlock_bh(&session->frwd_lock);
2077        }
2078
2079        bnx2i_ep->state = EP_STATE_DISCONN_START;
2080
2081        if (close)
2082                close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
2083        else
2084                close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);
2085
2086        if (close_ret)
2087                printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n",
2088                        bnx2i_ep->hba->netdev->name, close, close_ret);
2089        else
2090                /* wait for option-2 conn teardown */
2091                wait_event_interruptible(bnx2i_ep->ofld_wait,
2092                                ((bnx2i_ep->state != EP_STATE_DISCONN_START)
2093                                && (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD)));
2094
2095        if (signal_pending(current))
2096                flush_signals(current);
2097        del_timer_sync(&bnx2i_ep->ofld_timer);
2098
2099destroy_conn:
2100        bnx2i_ep_active_list_del(hba, bnx2i_ep);
2101        if (bnx2i_tear_down_conn(hba, bnx2i_ep))
2102                return -EINVAL;
2103out:
2104        bnx2i_ep->state = EP_STATE_IDLE;
2105        return ret;
2106}
2107
2108
2109/**
2110 * bnx2i_ep_disconnect - executes TCP connection teardown process
2111 * @ep:         TCP connection (iscsi endpoint) handle
2112 *
2113 * executes  TCP connection teardown process
2114 */
2115static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
2116{
2117        struct bnx2i_endpoint *bnx2i_ep;
2118        struct bnx2i_conn *bnx2i_conn = NULL;
2119        struct iscsi_conn *conn = NULL;
2120        struct bnx2i_hba *hba;
2121
2122        bnx2i_ep = ep->dd_data;
2123
2124        /* driver should not attempt connection cleanup until TCP_CONNECT
2125         * completes either successfully or fails. Timeout is 9-secs, so
2126         * wait for it to complete
2127         */
2128        while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
2129                !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
2130                msleep(250);
2131
2132        if (bnx2i_ep->conn) {
2133                bnx2i_conn = bnx2i_ep->conn;
2134                conn = bnx2i_conn->cls_conn->dd_data;
2135                iscsi_suspend_queue(conn);
2136        }
2137        hba = bnx2i_ep->hba;
2138
2139        mutex_lock(&hba->net_dev_lock);
2140
2141        if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2142                goto out;
2143
2144        if (bnx2i_ep->state == EP_STATE_IDLE)
2145                goto free_resc;
2146
2147        if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
2148            (bnx2i_ep->hba_age != hba->age)) {
2149                bnx2i_ep_active_list_del(hba, bnx2i_ep);
2150                goto free_resc;
2151        }
2152
2153        /* Do all chip cleanup here */
2154        if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {
2155                mutex_unlock(&hba->net_dev_lock);
2156                return;
2157        }
2158free_resc:
2159        bnx2i_free_qp_resc(hba, bnx2i_ep);
2160
2161        if (bnx2i_conn)
2162                bnx2i_conn->ep = NULL;
2163
2164        bnx2i_free_ep(ep);
2165out:
2166        mutex_unlock(&hba->net_dev_lock);
2167
2168        wake_up_interruptible(&hba->eh_wait);
2169}
2170
2171
2172/**
2173 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2174 * @buf:        pointer to buffer containing iscsi path message
2175 *
2176 */
2177static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
2178{
2179        struct bnx2i_hba *hba = iscsi_host_priv(shost);
2180        char *buf = (char *) params;
2181        u16 len = sizeof(*params);
2182
2183        /* handled by cnic driver */
2184        hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
2185                                     len);
2186
2187        return 0;
2188}
2189
2190static umode_t bnx2i_attr_is_visible(int param_type, int param)
2191{
2192        switch (param_type) {
2193        case ISCSI_HOST_PARAM:
2194                switch (param) {
2195                case ISCSI_HOST_PARAM_NETDEV_NAME:
2196                case ISCSI_HOST_PARAM_HWADDRESS:
2197                case ISCSI_HOST_PARAM_IPADDRESS:
2198                        return S_IRUGO;
2199                default:
2200                        return 0;
2201                }
2202        case ISCSI_PARAM:
2203                switch (param) {
2204                case ISCSI_PARAM_MAX_RECV_DLENGTH:
2205                case ISCSI_PARAM_MAX_XMIT_DLENGTH:
2206                case ISCSI_PARAM_HDRDGST_EN:
2207                case ISCSI_PARAM_DATADGST_EN:
2208                case ISCSI_PARAM_CONN_ADDRESS:
2209                case ISCSI_PARAM_CONN_PORT:
2210                case ISCSI_PARAM_EXP_STATSN:
2211                case ISCSI_PARAM_PERSISTENT_ADDRESS:
2212                case ISCSI_PARAM_PERSISTENT_PORT:
2213                case ISCSI_PARAM_PING_TMO:
2214                case ISCSI_PARAM_RECV_TMO:
2215                case ISCSI_PARAM_INITIAL_R2T_EN:
2216                case ISCSI_PARAM_MAX_R2T:
2217                case ISCSI_PARAM_IMM_DATA_EN:
2218                case ISCSI_PARAM_FIRST_BURST:
2219                case ISCSI_PARAM_MAX_BURST:
2220                case ISCSI_PARAM_PDU_INORDER_EN:
2221                case ISCSI_PARAM_DATASEQ_INORDER_EN:
2222                case ISCSI_PARAM_ERL:
2223                case ISCSI_PARAM_TARGET_NAME:
2224                case ISCSI_PARAM_TPGT:
2225                case ISCSI_PARAM_USERNAME:
2226                case ISCSI_PARAM_PASSWORD:
2227                case ISCSI_PARAM_USERNAME_IN:
2228                case ISCSI_PARAM_PASSWORD_IN:
2229                case ISCSI_PARAM_FAST_ABORT:
2230                case ISCSI_PARAM_ABORT_TMO:
2231                case ISCSI_PARAM_LU_RESET_TMO:
2232                case ISCSI_PARAM_TGT_RESET_TMO:
2233                case ISCSI_PARAM_IFACE_NAME:
2234                case ISCSI_PARAM_INITIATOR_NAME:
2235                case ISCSI_PARAM_BOOT_ROOT:
2236                case ISCSI_PARAM_BOOT_NIC:
2237                case ISCSI_PARAM_BOOT_TARGET:
2238                        return S_IRUGO;
2239                default:
2240                        return 0;
2241                }
2242        }
2243
2244        return 0;
2245}
2246
2247/*
2248 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2249 * used while registering with the scsi host and iSCSI transport module.
2250 */
2251static struct scsi_host_template bnx2i_host_template = {
2252        .module                 = THIS_MODULE,
2253        .name                   = "QLogic Offload iSCSI Initiator",
2254        .proc_name              = "bnx2i",
2255        .queuecommand           = iscsi_queuecommand,
2256        .eh_timed_out           = iscsi_eh_cmd_timed_out,
2257        .eh_abort_handler       = iscsi_eh_abort,
2258        .eh_device_reset_handler = iscsi_eh_device_reset,
2259        .eh_target_reset_handler = iscsi_eh_recover_target,
2260        .change_queue_depth     = scsi_change_queue_depth,
2261        .target_alloc           = iscsi_target_alloc,
2262        .can_queue              = 2048,
2263        .max_sectors            = 127,
2264        .cmd_per_lun            = 128,
2265        .this_id                = -1,
2266        .sg_tablesize           = ISCSI_MAX_BDS_PER_CMD,
2267        .shost_attrs            = bnx2i_dev_attributes,
2268        .track_queue_depth      = 1,
2269};
2270
2271struct iscsi_transport bnx2i_iscsi_transport = {
2272        .owner                  = THIS_MODULE,
2273        .name                   = "bnx2i",
2274        .caps                   = CAP_RECOVERY_L0 | CAP_HDRDGST |
2275                                  CAP_MULTI_R2T | CAP_DATADGST |
2276                                  CAP_DATA_PATH_OFFLOAD |
2277                                  CAP_TEXT_NEGO,
2278        .create_session         = bnx2i_session_create,
2279        .destroy_session        = bnx2i_session_destroy,
2280        .create_conn            = bnx2i_conn_create,
2281        .bind_conn              = bnx2i_conn_bind,
2282        .destroy_conn           = bnx2i_conn_destroy,
2283        .attr_is_visible        = bnx2i_attr_is_visible,
2284        .set_param              = iscsi_set_param,
2285        .get_conn_param         = iscsi_conn_get_param,
2286        .get_session_param      = iscsi_session_get_param,
2287        .get_host_param         = bnx2i_host_get_param,
2288        .start_conn             = bnx2i_conn_start,
2289        .stop_conn              = iscsi_conn_stop,
2290        .send_pdu               = iscsi_conn_send_pdu,
2291        .xmit_task              = bnx2i_task_xmit,
2292        .get_stats              = bnx2i_conn_get_stats,
2293        /* TCP connect - disconnect - option-2 interface calls */
2294        .get_ep_param           = bnx2i_ep_get_param,
2295        .ep_connect             = bnx2i_ep_connect,
2296        .ep_poll                = bnx2i_ep_poll,
2297        .ep_disconnect          = bnx2i_ep_disconnect,
2298        .set_path               = bnx2i_nl_set_path,
2299        /* Error recovery timeout call */
2300        .session_recovery_timedout = iscsi_session_recovery_timedout,
2301        .cleanup_task           = bnx2i_cleanup_task,
2302};
2303