drivers/scsi/bnx2i/bnx2i_iscsi.c

   1 /*
   2  * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver.
   3  *
   4  * Copyright (c) 2006 - 2010 Broadcom Corporation
   5  * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
   6  * Copyright (c) 2007, 2008 Mike Christie
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation.
  11  *
  12  * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
  13  * Maintained by: Eddie Wai (eddie.wai@broadcom.com)
  14  */
  15
  16 #include <linux/slab.h>
  17 #include <scsi/scsi_tcq.h>
  18 #include <scsi/libiscsi.h>
  19 #include "bnx2i.h"
  20
  21 struct scsi_transport_template *bnx2i_scsi_xport_template;
  22 struct iscsi_transport bnx2i_iscsi_transport;
  23 static struct scsi_host_template bnx2i_host_template;
  24
  25 /*
  26  * Global endpoint resource info
  27  */
  28 static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
  29
  30
  31 static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
  32 {
  33         int retval = 0;
  34
  35         if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
  36             test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
  37             test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
  38                 retval = -EPERM;
  39         return retval;
  40 }
  41
  42 /**
  43  * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
  44  * @cmd:                iscsi cmd struct pointer
  45  * @buf_off:            absolute buffer offset
  46  * @start_bd_off:       u32 pointer to return the offset within the BD
  47  *                      indicated by 'start_bd_idx' on which 'buf_off' falls
  48  * @start_bd_idx:       index of the BD on which 'buf_off' falls
  49  *
  50  * identifies & marks various bd info for scsi command's imm data,
  51  * unsolicited data and the first solicited data seq.
  52  */
  53 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
  54                                        u32 *start_bd_off, u32 *start_bd_idx)
  55 {
  56         struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
  57         u32 cur_offset = 0;
  58         u32 cur_bd_idx = 0;
  59
  60         if (buf_off) {
  61                 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
  62                         cur_offset += bd_tbl->buffer_length;
  63                         cur_bd_idx++;
  64                         bd_tbl++;
  65                 }
  66         }
  67
  68         *start_bd_off = buf_off - cur_offset;
  69         *start_bd_idx = cur_bd_idx;
  70 }
  71
  72 /**
  73  * bnx2i_setup_write_cmd_bd_info - sets up BD various information
  74  * @task:       transport layer's cmd struct pointer
  75  *
  76  * identifies & marks various bd info for scsi command's immediate data,
  77  * unsolicited data and first solicited data seq which includes BD start
  78  * index & BD buf off. his function takes into account iscsi parameter such
  79  * as immediate data and unsolicited data is support on this connection.
  80  */
  81 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
  82 {
  83         struct bnx2i_cmd *cmd = task->dd_data;
  84         u32 start_bd_offset;
  85         u32 start_bd_idx;
  86         u32 buffer_offset = 0;
  87         u32 cmd_len = cmd->req.total_data_transfer_length;
  88
  89         /* if ImmediateData is turned off & IntialR2T is turned on,
  90          * there will be no immediate or unsolicited data, just return.
  91          */
  92         if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
  93                 return;
  94
  95         /* Immediate data */
  96         buffer_offset += task->imm_count;
  97         if (task->imm_count == cmd_len)
  98                 return;
  99
 100         if (iscsi_task_has_unsol_data(task)) {
 101                 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
 102                                            &start_bd_offset, &start_bd_idx);
 103                 cmd->req.ud_buffer_offset = start_bd_offset;
 104                 cmd->req.ud_start_bd_index = start_bd_idx;
 105                 buffer_offset += task->unsol_r2t.data_length;
 106         }
 107
 108         if (buffer_offset != cmd_len) {
 109                 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
 110                                            &start_bd_offset, &start_bd_idx);
 111                 if ((start_bd_offset > task->conn->session->first_burst) ||
 112                     (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
 113                         int i = 0;
 114
 115                         iscsi_conn_printk(KERN_ALERT, task->conn,
 116                                           "bnx2i- error, buf offset 0x%x "
 117                                           "bd_valid %d use_sg %d\n",
 118                                           buffer_offset, cmd->io_tbl.bd_valid,
 119                                           scsi_sg_count(cmd->scsi_cmd));
 120                         for (i = 0; i < cmd->io_tbl.bd_valid; i++)
 121                                 iscsi_conn_printk(KERN_ALERT, task->conn,
 122                                                   "bnx2i err, bd[%d]: len %x\n",
 123                                                   i, cmd->io_tbl.bd_tbl[i].\
 124                                                   buffer_length);
 125                 }
 126                 cmd->req.sd_buffer_offset = start_bd_offset;
 127                 cmd->req.sd_start_bd_index = start_bd_idx;
 128         }
 129 }
 130
 131
 132
 133 /**
 134  * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
 135  * @hba:        adapter instance
 136  * @cmd:        iscsi cmd struct pointer
 137  *
 138  * map SG list
 139  */
 140 static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
 141 {
 142         struct scsi_cmnd *sc = cmd->scsi_cmd;
 143         struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
 144         struct scatterlist *sg;
 145         int byte_count = 0;
 146         int bd_count = 0;
 147         int sg_count;
 148         int sg_len;
 149         u64 addr;
 150         int i;
 151
 152         BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
 153
 154         sg_count = scsi_dma_map(sc);
 155
 156         scsi_for_each_sg(sc, sg, sg_count, i) {
 157                 sg_len = sg_dma_len(sg);
 158                 addr = (u64) sg_dma_address(sg);
 159                 bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
 160                 bd[bd_count].buffer_addr_hi = addr >> 32;
 161                 bd[bd_count].buffer_length = sg_len;
 162                 bd[bd_count].flags = 0;
 163                 if (bd_count == 0)
 164                         bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
 165
 166                 byte_count += sg_len;
 167                 bd_count++;
 168         }
 169
 170         if (bd_count)
 171                 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
 172
 173         BUG_ON(byte_count != scsi_bufflen(sc));
 174         return bd_count;
 175 }
 176
 177 /**
 178  * bnx2i_iscsi_map_sg_list - maps SG list
 179  * @cmd:        iscsi cmd struct pointer
 180  *
 181  * creates BD list table for the command
 182  */
 183 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
 184 {
 185         int bd_count;
 186
 187         bd_count  = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
 188         if (!bd_count) {
 189                 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
 190
 191                 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
 192                 bd[0].buffer_length = bd[0].flags = 0;
 193         }
 194         cmd->io_tbl.bd_valid = bd_count;
 195 }
 196
 197
 198 /**
 199  * bnx2i_iscsi_unmap_sg_list - unmaps SG list
 200  * @cmd:        iscsi cmd struct pointer
 201  *
 202  * unmap IO buffers and invalidate the BD table
 203  */
 204 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
 205 {
 206         struct scsi_cmnd *sc = cmd->scsi_cmd;
 207
 208         if (cmd->io_tbl.bd_valid && sc) {
 209                 scsi_dma_unmap(sc);
 210                 cmd->io_tbl.bd_valid = 0;
 211         }
 212 }
 213
 214 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
 215 {
 216         memset(&cmd->req, 0x00, sizeof(cmd->req));
 217         cmd->req.op_code = 0xFF;
 218         cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
 219         cmd->req.bd_list_addr_hi =
 220                 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
 221
 222 }
 223
 224
 225 /**
 226  * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
 227  * @hba:        pointer to adapter instance
 228  * @conn:       pointer to iscsi connection
 229  * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
 230  *
 231  * update iscsi cid table entry with connection pointer. This enables
 232  *      driver to quickly get hold of connection structure pointer in
 233  *      completion/interrupt thread using iscsi context ID
 234  */
 235 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
 236                                         struct bnx2i_conn *bnx2i_conn,
 237                                         u32 iscsi_cid)
 238 {
 239         if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
 240                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
 241                                  "conn bind - entry #%d not free\n", iscsi_cid);
 242                 return -EBUSY;
 243         }
 244
 245         hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
 246         return 0;
 247 }
 248
 249
 250 /**
 251  * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
 252  * @hba:        pointer to adapter instance
 253  * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
 254  */
 255 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
 256                                           u16 iscsi_cid)
 257 {
 258         if (!hba->cid_que.conn_cid_tbl) {
 259                 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
 260                 return NULL;
 261
 262         } else if (iscsi_cid >= hba->max_active_conns) {
 263                 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
 264                 return NULL;
 265         }
 266         return hba->cid_que.conn_cid_tbl[iscsi_cid];
 267 }
 268
 269
 270 /**
 271  * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
 272  * @hba:        pointer to adapter instance
 273  */
 274 static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
 275 {
 276         int idx;
 277
 278         if (!hba->cid_que.cid_free_cnt)
 279                 return -1;
 280
 281         idx = hba->cid_que.cid_q_cons_idx;
 282         hba->cid_que.cid_q_cons_idx++;
 283         if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
 284                 hba->cid_que.cid_q_cons_idx = 0;
 285
 286         hba->cid_que.cid_free_cnt--;
 287         return hba->cid_que.cid_que[idx];
 288 }
 289
 290
 291 /**
 292  * bnx2i_free_iscsi_cid - returns tcp port to free list
 293  * @hba:                pointer to adapter instance
 294  * @iscsi_cid:          iscsi context ID to free
 295  */
 296 static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
 297 {
 298         int idx;
 299
 300         if (iscsi_cid == (u16) -1)
 301                 return;
 302
 303         hba->cid_que.cid_free_cnt++;
 304
 305         idx = hba->cid_que.cid_q_prod_idx;
 306         hba->cid_que.cid_que[idx] = iscsi_cid;
 307         hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
 308         hba->cid_que.cid_q_prod_idx++;
 309         if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
 310                 hba->cid_que.cid_q_prod_idx = 0;
 311 }
 312
 313
 314 /**
 315  * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
 316  * @hba:        pointer to adapter instance
 317  *
 318  * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
 319  *      and initialize table attributes
 320  */
 321 static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
 322 {
 323         int mem_size;
 324         int i;
 325
 326         mem_size = hba->max_active_conns * sizeof(u32);
 327         mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 328
 329         hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
 330         if (!hba->cid_que.cid_que_base)
 331                 return -ENOMEM;
 332
 333         mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
 334         mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 335         hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
 336         if (!hba->cid_que.conn_cid_tbl) {
 337                 kfree(hba->cid_que.cid_que_base);
 338                 hba->cid_que.cid_que_base = NULL;
 339                 return -ENOMEM;
 340         }
 341
 342         hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
 343         hba->cid_que.cid_q_prod_idx = 0;
 344         hba->cid_que.cid_q_cons_idx = 0;
 345         hba->cid_que.cid_q_max_idx = hba->max_active_conns;
 346         hba->cid_que.cid_free_cnt = hba->max_active_conns;
 347
 348         for (i = 0; i < hba->max_active_conns; i++) {
 349                 hba->cid_que.cid_que[i] = i;
 350                 hba->cid_que.conn_cid_tbl[i] = NULL;
 351         }
 352         return 0;
 353 }
 354
 355
 356 /**
 357  * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
 358  * @hba:        pointer to adapter instance
 359  */
 360 static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
 361 {
 362         kfree(hba->cid_que.cid_que_base);
 363         hba->cid_que.cid_que_base = NULL;
 364
 365         kfree(hba->cid_que.conn_cid_tbl);
 366         hba->cid_que.conn_cid_tbl = NULL;
 367 }
 368
 369
 370 /**
 371  * bnx2i_alloc_ep - allocates ep structure from global pool
 372  * @hba:        pointer to adapter instance
 373  *
 374  * routine allocates a free endpoint structure from global pool and
 375  *      a tcp port to be used for this connection.  Global resource lock,
 376  *      'bnx2i_resc_lock' is held while accessing shared global data structures
 377  */
 378 static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
 379 {
 380         struct iscsi_endpoint *ep;
 381         struct bnx2i_endpoint *bnx2i_ep;
 382
 383         ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
 384         if (!ep) {
 385                 printk(KERN_ERR "bnx2i: Could not allocate ep\n");
 386                 return NULL;
 387         }
 388
 389         bnx2i_ep = ep->dd_data;
 390         bnx2i_ep->cls_ep = ep;
 391         INIT_LIST_HEAD(&bnx2i_ep->link);
 392         bnx2i_ep->state = EP_STATE_IDLE;
 393         bnx2i_ep->ep_iscsi_cid = (u16) -1;
 394         bnx2i_ep->hba = hba;
 395         bnx2i_ep->hba_age = hba->age;
 396         hba->ofld_conns_active++;
 397         init_waitqueue_head(&bnx2i_ep->ofld_wait);
 398         return ep;
 399 }
 400
 401
 402 /**
 403  * bnx2i_free_ep - free endpoint
 404  * @ep:         pointer to iscsi endpoint structure
 405  */
 406 static void bnx2i_free_ep(struct iscsi_endpoint *ep)
 407 {
 408         struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
 409         unsigned long flags;
 410
 411         spin_lock_irqsave(&bnx2i_resc_lock, flags);
 412         bnx2i_ep->state = EP_STATE_IDLE;
 413         bnx2i_ep->hba->ofld_conns_active--;
 414
 415         if (bnx2i_ep->ep_iscsi_cid != (u16) -1)
 416                 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
 417
 418         if (bnx2i_ep->conn) {
 419                 bnx2i_ep->conn->ep = NULL;
 420                 bnx2i_ep->conn = NULL;
 421         }
 422
 423         bnx2i_ep->hba = NULL;
 424         spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
 425         iscsi_destroy_endpoint(ep);
 426 }
 427
 428
 429 /**
 430  * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
 431  * @hba:        adapter instance pointer
 432  * @session:    iscsi session pointer
 433  * @cmd:        iscsi command structure
 434  */
 435 static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
 436                            struct bnx2i_cmd *cmd)
 437 {
 438         struct io_bdt *io = &cmd->io_tbl;
 439         struct iscsi_bd *bd;
 440
 441         io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
 442                                         ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
 443                                         &io->bd_tbl_dma, GFP_KERNEL);
 444         if (!io->bd_tbl) {
 445                 iscsi_session_printk(KERN_ERR, session, "Could not "
 446                                      "allocate bdt.\n");
 447                 return -ENOMEM;
 448         }
 449         io->bd_valid = 0;
 450         return 0;
 451 }
 452
 453 /**
 454  * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
 455  * @hba:        adapter instance pointer
 456  * @session:    iscsi session pointer
 457  * @cmd:        iscsi command structure
 458  */
 459 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
 460                                    struct iscsi_session *session)
 461 {
 462         int i;
 463
 464         for (i = 0; i < session->cmds_max; i++) {
 465                 struct iscsi_task *task = session->cmds[i];
 466                 struct bnx2i_cmd *cmd = task->dd_data;
 467
 468                 if (cmd->io_tbl.bd_tbl)
 469                         dma_free_coherent(&hba->pcidev->dev,
 470                                           ISCSI_MAX_BDS_PER_CMD *
 471                                           sizeof(struct iscsi_bd),
 472                                           cmd->io_tbl.bd_tbl,
 473                                           cmd->io_tbl.bd_tbl_dma);
 474         }
 475
 476 }
 477
 478
 479 /**
 480  * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
 481  * @hba:        adapter instance pointer
 482  * @session:    iscsi session pointer
 483  */
 484 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
 485                                 struct iscsi_session *session)
 486 {
 487         int i;
 488
 489         for (i = 0; i < session->cmds_max; i++) {
 490                 struct iscsi_task *task = session->cmds[i];
 491                 struct bnx2i_cmd *cmd = task->dd_data;
 492
 493                 task->hdr = &cmd->hdr;
 494                 task->hdr_max = sizeof(struct iscsi_hdr);
 495
 496                 if (bnx2i_alloc_bdt(hba, session, cmd))
 497                         goto free_bdts;
 498         }
 499
 500         return 0;
 501
 502 free_bdts:
 503         bnx2i_destroy_cmd_pool(hba, session);
 504         return -ENOMEM;
 505 }
 506
 507
 508 /**
 509  * bnx2i_setup_mp_bdt - allocate BD table resources
 510  * @hba:        pointer to adapter structure
 511  *
 512  * Allocate memory for dummy buffer and associated BD
 513  * table to be used by middle path (MP) requests
 514  */
 515 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
 516 {
 517         int rc = 0;
 518         struct iscsi_bd *mp_bdt;
 519         u64 addr;
 520
 521         hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
 522                                             &hba->mp_bd_dma, GFP_KERNEL);
 523         if (!hba->mp_bd_tbl) {
 524                 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
 525                 rc = -1;
 526                 goto out;
 527         }
 528
 529         hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
 530                                                &hba->dummy_buf_dma, GFP_KERNEL);
 531         if (!hba->dummy_buffer) {
 532                 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
 533                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
 534                                   hba->mp_bd_tbl, hba->mp_bd_dma);
 535                 hba->mp_bd_tbl = NULL;
 536                 rc = -1;
 537                 goto out;
 538         }
 539
 540         mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
 541         addr = (unsigned long) hba->dummy_buf_dma;
 542         mp_bdt->buffer_addr_lo = addr & 0xffffffff;
 543         mp_bdt->buffer_addr_hi = addr >> 32;
 544         mp_bdt->buffer_length = PAGE_SIZE;
 545         mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
 546                         ISCSI_BD_FIRST_IN_BD_CHAIN;
 547 out:
 548         return rc;
 549 }
 550
 551
 552 /**
 553  * bnx2i_free_mp_bdt - releases ITT back to free pool
 554  * @hba:        pointer to adapter instance
 555  *
 556  * free MP dummy buffer and associated BD table
 557  */
 558 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
 559 {
 560         if (hba->mp_bd_tbl) {
 561                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
 562                                   hba->mp_bd_tbl, hba->mp_bd_dma);
 563                 hba->mp_bd_tbl = NULL;
 564         }
 565         if (hba->dummy_buffer) {
 566                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
 567                                   hba->dummy_buffer, hba->dummy_buf_dma);
 568                 hba->dummy_buffer = NULL;
 569         }
 570                 return;
 571 }
 572
 573 /**
 574  * bnx2i_drop_session - notifies iscsid of connection error.
 575  * @hba:        adapter instance pointer
 576  * @session:    iscsi session pointer
 577  *
 578  * This notifies iscsid that there is a error, so it can initiate
 579  * recovery.
 580  *
 581  * This relies on caller using the iscsi class iterator so the object
 582  * is refcounted and does not disapper from under us.
 583  */
 584 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
 585 {
 586         iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
 587 }
 588
 589 /**
 590  * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
 591  * @hba:        pointer to adapter instance
 592  * @ep:         pointer to endpoint (transport indentifier) structure
 593  *
 594  * EP destroy queue manager
 595  */
 596 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
 597                                      struct bnx2i_endpoint *ep)
 598 {
 599         write_lock_bh(&hba->ep_rdwr_lock);
 600         list_add_tail(&ep->link, &hba->ep_destroy_list);
 601         write_unlock_bh(&hba->ep_rdwr_lock);
 602         return 0;
 603 }
 604
 605 /**
 606  * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
 607  *
 608  * @hba:                pointer to adapter instance
 609  * @ep:                 pointer to endpoint (transport indentifier) structure
 610  *
 611  * EP destroy queue manager
 612  */
 613 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
 614                                      struct bnx2i_endpoint *ep)
 615 {
 616         write_lock_bh(&hba->ep_rdwr_lock);
 617         list_del_init(&ep->link);
 618         write_unlock_bh(&hba->ep_rdwr_lock);
 619
 620         return 0;
 621 }
 622
 623 /**
 624  * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
 625  * @hba:        pointer to adapter instance
 626  * @ep:         pointer to endpoint (transport indentifier) structure
 627  *
 628  * pending conn offload completion queue manager
 629  */
 630 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
 631                                   struct bnx2i_endpoint *ep)
 632 {
 633         write_lock_bh(&hba->ep_rdwr_lock);
 634         list_add_tail(&ep->link, &hba->ep_ofld_list);
 635         write_unlock_bh(&hba->ep_rdwr_lock);
 636         return 0;
 637 }
 638
 639 /**
 640  * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
 641  * @hba:                pointer to adapter instance
 642  * @ep:                 pointer to endpoint (transport indentifier) structure
 643  *
 644  * pending conn offload completion queue manager
 645  */
 646 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
 647                                   struct bnx2i_endpoint *ep)
 648 {
 649         write_lock_bh(&hba->ep_rdwr_lock);
 650         list_del_init(&ep->link);
 651         write_unlock_bh(&hba->ep_rdwr_lock);
 652         return 0;
 653 }
 654
 655
 656 /**
 657  * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
 658  *
 659  * @hba:                pointer to adapter instance
 660  * @iscsi_cid:          iscsi context ID to find
 661  *
 662  */
 663 struct bnx2i_endpoint *
 664 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
 665 {
 666         struct list_head *list;
 667         struct list_head *tmp;
 668         struct bnx2i_endpoint *ep;
 669
 670         read_lock_bh(&hba->ep_rdwr_lock);
 671         list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
 672                 ep = (struct bnx2i_endpoint *)list;
 673
 674                 if (ep->ep_iscsi_cid == iscsi_cid)
 675                         break;
 676                 ep = NULL;
 677         }
 678         read_unlock_bh(&hba->ep_rdwr_lock);
 679
 680         if (!ep)
 681                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
 682         return ep;
 683 }
 684
 685 /**
 686  * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
 687  * @hba:                pointer to adapter instance
 688  * @iscsi_cid:          iscsi context ID to find
 689  *
 690  */
 691 struct bnx2i_endpoint *
 692 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
 693 {
 694         struct list_head *list;
 695         struct list_head *tmp;
 696         struct bnx2i_endpoint *ep;
 697
 698         read_lock_bh(&hba->ep_rdwr_lock);
 699         list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
 700                 ep = (struct bnx2i_endpoint *)list;
 701
 702                 if (ep->ep_iscsi_cid == iscsi_cid)
 703                         break;
 704                 ep = NULL;
 705         }
 706         read_unlock_bh(&hba->ep_rdwr_lock);
 707
 708         if (!ep)
 709                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
 710
 711         return ep;
 712 }
 713
 714 /**
 715  * bnx2i_ep_active_list_add - add an entry to ep active list
 716  * @hba:        pointer to adapter instance
 717  * @ep:         pointer to endpoint (transport indentifier) structure
 718  *
 719  * current active conn queue manager
 720  */
 721 static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,
 722                                      struct bnx2i_endpoint *ep)
 723 {
 724         write_lock_bh(&hba->ep_rdwr_lock);
 725         list_add_tail(&ep->link, &hba->ep_active_list);
 726         write_unlock_bh(&hba->ep_rdwr_lock);
 727 }
 728
 729
 730 /**
 731  * bnx2i_ep_active_list_del - deletes an entry to ep active list
 732  * @hba:        pointer to adapter instance
 733  * @ep:         pointer to endpoint (transport indentifier) structure
 734  *
 735  * current active conn queue manager
 736  */
 737 static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba,
 738                                      struct bnx2i_endpoint *ep)
 739 {
 740         write_lock_bh(&hba->ep_rdwr_lock);
 741         list_del_init(&ep->link);
 742         write_unlock_bh(&hba->ep_rdwr_lock);
 743 }
 744
 745
 746 /**
 747  * bnx2i_setup_host_queue_size - assigns shost->can_queue param
 748  * @hba:        pointer to adapter instance
 749  * @shost:      scsi host pointer
 750  *
 751  * Initializes 'can_queue' parameter based on how many outstanding commands
 752  *      the device can handle. Each device 5708/5709/57710 has different
 753  *      capabilities
 754  */
 755 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
 756                                         struct Scsi_Host *shost)
 757 {
 758         if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
 759                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
 760         else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
 761                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
 762         else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
 763                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
 764         else
 765                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
 766 }
 767
 768
 769 /**
 770  * bnx2i_alloc_hba - allocate and init adapter instance
 771  * @cnic:       cnic device pointer
 772  *
 773  * allocate & initialize adapter structure and call other
 774  *      support routines to do per adapter initialization
 775  */
 776 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
 777 {
 778         struct Scsi_Host *shost;
 779         struct bnx2i_hba *hba;
 780
 781         shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
 782         if (!shost)
 783                 return NULL;
 784         shost->dma_boundary = cnic->pcidev->dma_mask;
 785         shost->transportt = bnx2i_scsi_xport_template;
 786         shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
 787         shost->max_channel = 0;
 788         shost->max_lun = 512;
 789         shost->max_cmd_len = 16;
 790
 791         hba = iscsi_host_priv(shost);
 792         hba->shost = shost;
 793         hba->netdev = cnic->netdev;
 794         /* Get PCI related information and update hba struct members */
 795         hba->pcidev = cnic->pcidev;
 796         pci_dev_get(hba->pcidev);
 797         hba->pci_did = hba->pcidev->device;
 798         hba->pci_vid = hba->pcidev->vendor;
 799         hba->pci_sdid = hba->pcidev->subsystem_device;
 800         hba->pci_svid = hba->pcidev->subsystem_vendor;
 801         hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
 802         hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
 803
 804         bnx2i_identify_device(hba);
 805         bnx2i_setup_host_queue_size(hba, shost);
 806
 807         if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
 808                 hba->regview = ioremap_nocache(hba->netdev->base_addr,
 809                                                BNX2_MQ_CONFIG2);
 810                 if (!hba->regview)
 811                         goto ioreg_map_err;
 812         } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 813                 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096);
 814                 if (!hba->regview)
 815                         goto ioreg_map_err;
 816         }
 817
 818         if (bnx2i_setup_mp_bdt(hba))
 819                 goto mp_bdt_mem_err;
 820
 821         INIT_LIST_HEAD(&hba->ep_ofld_list);
 822         INIT_LIST_HEAD(&hba->ep_active_list);
 823         INIT_LIST_HEAD(&hba->ep_destroy_list);
 824         rwlock_init(&hba->ep_rdwr_lock);
 825
 826         hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
 827
 828         /* different values for 5708/5709/57710 */
 829         hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
 830
 831         if (bnx2i_setup_free_cid_que(hba))
 832                 goto cid_que_err;
 833
 834         /* SQ/RQ/CQ size can be changed via sysfx interface */
 835         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 836                 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
 837                         hba->max_sqes = sq_size;
 838                 else
 839                         hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
 840         } else {        /* 5706/5708/5709 */
 841                 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
 842                         hba->max_sqes = sq_size;
 843                 else
 844                         hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
 845         }
 846
 847         hba->max_rqes = rq_size;
 848         hba->max_cqes = hba->max_sqes + rq_size;
 849         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 850                 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
 851                         hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
 852         } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
 853                 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
 854
 855         hba->num_ccell = hba->max_sqes / 2;
 856
 857         spin_lock_init(&hba->lock);
 858         mutex_init(&hba->net_dev_lock);
 859         init_waitqueue_head(&hba->eh_wait);
 860         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 861                 hba->hba_shutdown_tmo = 20 * HZ;
 862                 hba->conn_teardown_tmo = 20 * HZ;
 863                 hba->conn_ctx_destroy_tmo = 6 * HZ;
 864         } else {        /* 5706/5708/5709 */
 865                 hba->hba_shutdown_tmo = 20 * HZ;
 866                 hba->conn_teardown_tmo = 10 * HZ;
 867                 hba->conn_ctx_destroy_tmo = 2 * HZ;
 868         }
 869
 870         if (iscsi_host_add(shost, &hba->pcidev->dev))
 871                 goto free_dump_mem;
 872         return hba;
 873
 874 free_dump_mem:
 875         bnx2i_release_free_cid_que(hba);
 876 cid_que_err:
 877         bnx2i_free_mp_bdt(hba);
 878 mp_bdt_mem_err:
 879         if (hba->regview) {
 880                 iounmap(hba->regview);
 881                 hba->regview = NULL;
 882         }
 883 ioreg_map_err:
 884         pci_dev_put(hba->pcidev);
 885         scsi_host_put(shost);
 886         return NULL;
 887 }
 888
 889 /**
 890  * bnx2i_free_hba- releases hba structure and resources held by the adapter
 891  * @hba:        pointer to adapter instance
 892  *
 893  * free adapter structure and call various cleanup routines.
 894  */
 895 void bnx2i_free_hba(struct bnx2i_hba *hba)
 896 {
 897         struct Scsi_Host *shost = hba->shost;
 898
 899         iscsi_host_remove(shost);
 900         INIT_LIST_HEAD(&hba->ep_ofld_list);
 901         INIT_LIST_HEAD(&hba->ep_active_list);
 902         INIT_LIST_HEAD(&hba->ep_destroy_list);
 903         pci_dev_put(hba->pcidev);
 904
 905         if (hba->regview) {
 906                 iounmap(hba->regview);
 907                 hba->regview = NULL;
 908         }
 909         bnx2i_free_mp_bdt(hba);
 910         bnx2i_release_free_cid_que(hba);
 911         iscsi_host_free(shost);
 912 }
 913
 914 /**
 915  * bnx2i_conn_free_login_resources - free DMA resources used for login process
 916  * @hba:                pointer to adapter instance
 917  * @bnx2i_conn:         iscsi connection pointer
 918  *
 919  * Login related resources, mostly BDT & payload DMA memory is freed
 920  */
 921 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
 922                                             struct bnx2i_conn *bnx2i_conn)
 923 {
 924         if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
 925                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
 926                                   bnx2i_conn->gen_pdu.resp_bd_tbl,
 927                                   bnx2i_conn->gen_pdu.resp_bd_dma);
 928                 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
 929         }
 930
 931         if (bnx2i_conn->gen_pdu.req_bd_tbl) {
 932                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
 933                                   bnx2i_conn->gen_pdu.req_bd_tbl,
 934                                   bnx2i_conn->gen_pdu.req_bd_dma);
 935                 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
 936         }
 937
 938         if (bnx2i_conn->gen_pdu.resp_buf) {
 939                 dma_free_coherent(&hba->pcidev->dev,
 940                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
 941                                   bnx2i_conn->gen_pdu.resp_buf,
 942                                   bnx2i_conn->gen_pdu.resp_dma_addr);
 943                 bnx2i_conn->gen_pdu.resp_buf = NULL;
 944         }
 945
 946         if (bnx2i_conn->gen_pdu.req_buf) {
 947                 dma_free_coherent(&hba->pcidev->dev,
 948                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
 949                                   bnx2i_conn->gen_pdu.req_buf,
 950                                   bnx2i_conn->gen_pdu.req_dma_addr);
 951                 bnx2i_conn->gen_pdu.req_buf = NULL;
 952         }
 953 }
 954
 955 /**
 956  * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
 957  * @hba:                pointer to adapter instance
 958  * @bnx2i_conn:         iscsi connection pointer
 959  *
 960  * Mgmt task DNA resources are allocated in this routine.
 961  */
 962 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
 963                                             struct bnx2i_conn *bnx2i_conn)
 964 {
 965         /* Allocate memory for login request/response buffers */
 966         bnx2i_conn->gen_pdu.req_buf =
 967                 dma_alloc_coherent(&hba->pcidev->dev,
 968                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
 969                                    &bnx2i_conn->gen_pdu.req_dma_addr,
 970                                    GFP_KERNEL);
 971         if (bnx2i_conn->gen_pdu.req_buf == NULL)
 972                 goto login_req_buf_failure;
 973
 974         bnx2i_conn->gen_pdu.req_buf_size = 0;
 975         bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
 976
 977         bnx2i_conn->gen_pdu.resp_buf =
 978                 dma_alloc_coherent(&hba->pcidev->dev,
 979                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
 980                                    &bnx2i_conn->gen_pdu.resp_dma_addr,
 981                                    GFP_KERNEL);
 982         if (bnx2i_conn->gen_pdu.resp_buf == NULL)
 983                 goto login_resp_buf_failure;
 984
 985         bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
 986         bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
 987
 988         bnx2i_conn->gen_pdu.req_bd_tbl =
 989                 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
 990                                    &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
 991         if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
 992                 goto login_req_bd_tbl_failure;
 993
 994         bnx2i_conn->gen_pdu.resp_bd_tbl =
 995                 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
 996                                    &bnx2i_conn->gen_pdu.resp_bd_dma,
 997                                    GFP_KERNEL);
 998         if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
 999                 goto login_resp_bd_tbl_failure;
1000
1001         return 0;
1002
1003 login_resp_bd_tbl_failure:
1004         dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
1005                           bnx2i_conn->gen_pdu.req_bd_tbl,
1006                           bnx2i_conn->gen_pdu.req_bd_dma);
1007         bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
1008
1009 login_req_bd_tbl_failure:
1010         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1011                           bnx2i_conn->gen_pdu.resp_buf,
1012                           bnx2i_conn->gen_pdu.resp_dma_addr);
1013         bnx2i_conn->gen_pdu.resp_buf = NULL;
1014 login_resp_buf_failure:
1015         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1016                           bnx2i_conn->gen_pdu.req_buf,
1017                           bnx2i_conn->gen_pdu.req_dma_addr);
1018         bnx2i_conn->gen_pdu.req_buf = NULL;
1019 login_req_buf_failure:
1020         iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
1021                           "login resource alloc failed!!\n");
1022         return -ENOMEM;
1023
1024 }
1025
1026
1027 /**
1028  * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
1029  * @bnx2i_conn:         iscsi connection pointer
1030  *
1031  * Allocates buffers and BD tables before shipping requests to cnic
1032  *      for PDUs prepared by 'iscsid' daemon
1033  */
1034 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
1035 {
1036         struct iscsi_bd *bd_tbl;
1037
1038         bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
1039
1040         bd_tbl->buffer_addr_hi =
1041                 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
1042         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
1043         bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
1044                                 bnx2i_conn->gen_pdu.req_buf;
1045         bd_tbl->reserved0 = 0;
1046         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1047                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1048
1049         bd_tbl = (struct iscsi_bd  *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1050         bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1051         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1052         bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1053         bd_tbl->reserved0 = 0;
1054         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1055                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1056 }
1057
1058
1059 /**
1060  * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1061  * @task:       transport layer task pointer
1062  *
1063  * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1064  *      Nop-out and Logout requests flow through this path.
1065  */
1066 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1067 {
1068         struct bnx2i_cmd *cmd = task->dd_data;
1069         struct bnx2i_conn *bnx2i_conn = cmd->conn;
1070         int rc = 0;
1071         char *buf;
1072         int data_len;
1073
1074         bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1075         switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1076         case ISCSI_OP_LOGIN:
1077                 bnx2i_send_iscsi_login(bnx2i_conn, task);
1078                 break;
1079         case ISCSI_OP_NOOP_OUT:
1080                 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1081                 buf = bnx2i_conn->gen_pdu.req_buf;
1082                 if (data_len)
1083                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1084                                                      buf, data_len, 1);
1085                 else
1086                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1087                                                      NULL, 0, 1);
1088                 break;
1089         case ISCSI_OP_LOGOUT:
1090                 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1091                 break;
1092         case ISCSI_OP_SCSI_TMFUNC:
1093                 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1094                 break;
1095         default:
1096                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1097                                   "send_gen: unsupported op 0x%x\n",
1098                                   task->hdr->opcode);
1099         }
1100         return rc;
1101 }
1102
1103
1104 /**********************************************************************
1105  *              SCSI-ML Interface
1106  **********************************************************************/
1107
1108 /**
1109  * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1110  * @sc:         SCSI-ML command pointer
1111  * @cmd:        iscsi cmd pointer
1112  */
1113 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1114 {
1115         u32 dword;
1116         int lpcnt;
1117         u8 *srcp;
1118         u32 *dstp;
1119         u32 scsi_lun[2];
1120
1121         int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1122         cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1123         cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1124
1125         lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1126         srcp = (u8 *) sc->cmnd;
1127         dstp = (u32 *) cmd->req.cdb;
1128         while (lpcnt--) {
1129                 memcpy(&dword, (const void *) srcp, 4);
1130                 *dstp = cpu_to_be32(dword);
1131                 srcp += 4;
1132                 dstp++;
1133         }
1134         if (sc->cmd_len & 0x3) {
1135                 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1136                 *dstp = cpu_to_be32(dword);
1137         }
1138 }
1139
1140 static void bnx2i_cleanup_task(struct iscsi_task *task)
1141 {
1142         struct iscsi_conn *conn = task->conn;
1143         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1144         struct bnx2i_hba *hba = bnx2i_conn->hba;
1145
1146         /*
1147          * mgmt task or cmd was never sent to us to transmit.
1148          */
1149         if (!task->sc || task->state == ISCSI_TASK_PENDING)
1150                 return;
1151         /*
1152          * need to clean-up task context to claim dma buffers
1153          */
1154         if (task->state == ISCSI_TASK_ABRT_TMF) {
1155                 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1156
1157                 spin_unlock_bh(&conn->session->lock);
1158                 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1159                                 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1160                 spin_lock_bh(&conn->session->lock);
1161         }
1162         bnx2i_iscsi_unmap_sg_list(task->dd_data);
1163 }
1164
1165 /**
1166  * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1167  * @conn:       transport layer conn structure pointer
1168  * @task:       transport layer command structure pointer
1169  */
1170 static int
1171 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1172 {
1173         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1174         struct bnx2i_cmd *cmd = task->dd_data;
1175
1176         memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1177
1178         bnx2i_setup_cmd_wqe_template(cmd);
1179         bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1180         if (task->data_count) {
1181                 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1182                        task->data_count);
1183                 bnx2i_conn->gen_pdu.req_wr_ptr =
1184                         bnx2i_conn->gen_pdu.req_buf + task->data_count;
1185         }
1186         cmd->conn = conn->dd_data;
1187         cmd->scsi_cmd = NULL;
1188         return bnx2i_iscsi_send_generic_request(task);
1189 }
1190
1191 /**
1192  * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1193  * @task:       transport layer command structure pointer
1194  *
1195  * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1196  */
1197 static int bnx2i_task_xmit(struct iscsi_task *task)
1198 {
1199         struct iscsi_conn *conn = task->conn;
1200         struct iscsi_session *session = conn->session;
1201         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1202         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1203         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1204         struct scsi_cmnd *sc = task->sc;
1205         struct bnx2i_cmd *cmd = task->dd_data;
1206         struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
1207
1208         /*
1209          * If there is no scsi_cmnd this must be a mgmt task
1210          */
1211         if (!sc)
1212                 return bnx2i_mtask_xmit(conn, task);
1213
1214         bnx2i_setup_cmd_wqe_template(cmd);
1215         cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1216         cmd->conn = bnx2i_conn;
1217         cmd->scsi_cmd = sc;
1218         cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1219         cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1220
1221         bnx2i_iscsi_map_sg_list(cmd);
1222         bnx2i_cpy_scsi_cdb(sc, cmd);
1223
1224         cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1225         if (sc->sc_data_direction == DMA_TO_DEVICE) {
1226                 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1227                 cmd->req.itt = task->itt |
1228                         (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1229                 bnx2i_setup_write_cmd_bd_info(task);
1230         } else {
1231                 if (scsi_bufflen(sc))
1232                         cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1233                 cmd->req.itt = task->itt |
1234                         (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1235         }
1236
1237         cmd->req.num_bds = cmd->io_tbl.bd_valid;
1238         if (!cmd->io_tbl.bd_valid) {
1239                 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1240                 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1241                 cmd->req.num_bds = 1;
1242         }
1243
1244         bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1245         return 0;
1246 }
1247
1248 /**
1249  * bnx2i_session_create - create a new iscsi session
1250  * @cmds_max:           max commands supported
1251  * @qdepth:             scsi queue depth to support
1252  * @initial_cmdsn:      initial iscsi CMDSN to be used for this session
1253  *
1254  * Creates a new iSCSI session instance on given device.
1255  */
1256 static struct iscsi_cls_session *
1257 bnx2i_session_create(struct iscsi_endpoint *ep,
1258                      uint16_t cmds_max, uint16_t qdepth,
1259                      uint32_t initial_cmdsn)
1260 {
1261         struct Scsi_Host *shost;
1262         struct iscsi_cls_session *cls_session;
1263         struct bnx2i_hba *hba;
1264         struct bnx2i_endpoint *bnx2i_ep;
1265
1266         if (!ep) {
1267                 printk(KERN_ERR "bnx2i: missing ep.\n");
1268                 return NULL;
1269         }
1270
1271         bnx2i_ep = ep->dd_data;
1272         shost = bnx2i_ep->hba->shost;
1273         hba = iscsi_host_priv(shost);
1274         if (bnx2i_adapter_ready(hba))
1275                 return NULL;
1276
1277         /*
1278          * user can override hw limit as long as it is within
1279          * the min/max.
1280          */
1281         if (cmds_max > hba->max_sqes)
1282                 cmds_max = hba->max_sqes;
1283         else if (cmds_max < BNX2I_SQ_WQES_MIN)
1284                 cmds_max = BNX2I_SQ_WQES_MIN;
1285
1286         cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1287                                           cmds_max, 0, sizeof(struct bnx2i_cmd),
1288                                           initial_cmdsn, ISCSI_MAX_TARGET);
1289         if (!cls_session)
1290                 return NULL;
1291
1292         if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1293                 goto session_teardown;
1294         return cls_session;
1295
1296 session_teardown:
1297         iscsi_session_teardown(cls_session);
1298         return NULL;
1299 }
1300
1301
1302 /**
1303  * bnx2i_session_destroy - destroys iscsi session
1304  * @cls_session:        pointer to iscsi cls session
1305  *
1306  * Destroys previously created iSCSI session instance and releases
1307  *      all resources held by it
1308  */
1309 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1310 {
1311         struct iscsi_session *session = cls_session->dd_data;
1312         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1313         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1314
1315         bnx2i_destroy_cmd_pool(hba, session);
1316         iscsi_session_teardown(cls_session);
1317 }
1318
1319
1320 /**
1321  * bnx2i_conn_create - create iscsi connection instance
1322  * @cls_session:        pointer to iscsi cls session
1323  * @cid:                iscsi cid as per rfc (not NX2's CID terminology)
1324  *
1325  * Creates a new iSCSI connection instance for a given session
1326  */
1327 static struct iscsi_cls_conn *
1328 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1329 {
1330         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1331         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1332         struct bnx2i_conn *bnx2i_conn;
1333         struct iscsi_cls_conn *cls_conn;
1334         struct iscsi_conn *conn;
1335
1336         cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1337                                     cid);
1338         if (!cls_conn)
1339                 return NULL;
1340         conn = cls_conn->dd_data;
1341
1342         bnx2i_conn = conn->dd_data;
1343         bnx2i_conn->cls_conn = cls_conn;
1344         bnx2i_conn->hba = hba;
1345         /* 'ep' ptr will be assigned in bind() call */
1346         bnx2i_conn->ep = NULL;
1347         init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1348
1349         if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1350                 iscsi_conn_printk(KERN_ALERT, conn,
1351                                   "conn_new: login resc alloc failed!!\n");
1352                 goto free_conn;
1353         }
1354
1355         return cls_conn;
1356
1357 free_conn:
1358         iscsi_conn_teardown(cls_conn);
1359         return NULL;
1360 }
1361
1362 /**
1363  * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1364  * @cls_session:        pointer to iscsi cls session
1365  * @cls_conn:           pointer to iscsi cls conn
1366  * @transport_fd:       64-bit EP handle
1367  * @is_leading:         leading connection on this session?
1368  *
1369  * Binds together iSCSI session instance, iSCSI connection instance
1370  *      and the TCP connection. This routine returns error code if
1371  *      TCP connection does not belong on the device iSCSI sess/conn
1372  *      is bound
1373  */
1374 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1375                            struct iscsi_cls_conn *cls_conn,
1376                            uint64_t transport_fd, int is_leading)
1377 {
1378         struct iscsi_conn *conn = cls_conn->dd_data;
1379         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1380         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1381         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1382         struct bnx2i_endpoint *bnx2i_ep;
1383         struct iscsi_endpoint *ep;
1384         int ret_code;
1385
1386         ep = iscsi_lookup_endpoint(transport_fd);
1387         if (!ep)
1388                 return -EINVAL;
1389         /*
1390          * Forcefully terminate all in progress connection recovery at the
1391          * earliest, either in bind(), send_pdu(LOGIN), or conn_start()
1392          */
1393         if (bnx2i_adapter_ready(hba))
1394                 return -EIO;
1395
1396         bnx2i_ep = ep->dd_data;
1397         if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1398             (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1399                 /* Peer disconnect via' FIN or RST */
1400                 return -EINVAL;
1401
1402         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1403                 return -EINVAL;
1404
1405         if (bnx2i_ep->hba != hba) {
1406                 /* Error - TCP connection does not belong to this device
1407                  */
1408                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1409                                   "conn bind, ep=0x%p (%s) does not",
1410                                   bnx2i_ep, bnx2i_ep->hba->netdev->name);
1411                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1412                                   "belong to hba (%s)\n",
1413                                   hba->netdev->name);
1414                 return -EEXIST;
1415         }
1416         bnx2i_ep->conn = bnx2i_conn;
1417         bnx2i_conn->ep = bnx2i_ep;
1418         bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1419         bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1420
1421         ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1422                                                 bnx2i_ep->ep_iscsi_cid);
1423
1424         /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1425          * driver needs to explicitly replenish RQ index during setup.
1426          */
1427         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1428                 bnx2i_put_rq_buf(bnx2i_conn, 0);
1429
1430         bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1431         return ret_code;
1432 }
1433
1434
1435 /**
1436  * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1437  * @cls_conn:   pointer to iscsi cls conn
1438  *
1439  * Destroy an iSCSI connection instance and release memory resources held by
1440  *      this connection
1441  */
1442 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1443 {
1444         struct iscsi_conn *conn = cls_conn->dd_data;
1445         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1446         struct Scsi_Host *shost;
1447         struct bnx2i_hba *hba;
1448
1449         shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1450         hba = iscsi_host_priv(shost);
1451
1452         bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1453         iscsi_conn_teardown(cls_conn);
1454 }
1455
1456
1457 /**
1458  * bnx2i_conn_get_param - return iscsi connection parameter to caller
1459  * @cls_conn:   pointer to iscsi cls conn
1460  * @param:      parameter type identifier
1461  * @buf:        buffer pointer
1462  *
1463  * returns iSCSI connection parameters
1464  */
1465 static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn,
1466                                 enum iscsi_param param, char *buf)
1467 {
1468         struct iscsi_conn *conn = cls_conn->dd_data;
1469         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1470         int len = 0;
1471
1472         if (!(bnx2i_conn && bnx2i_conn->ep && bnx2i_conn->ep->hba))
1473                 goto out;
1474
1475         switch (param) {
1476         case ISCSI_PARAM_CONN_PORT:
1477                 mutex_lock(&bnx2i_conn->ep->hba->net_dev_lock);
1478                 if (bnx2i_conn->ep->cm_sk)
1479                         len = sprintf(buf, "%hu\n",
1480                                       bnx2i_conn->ep->cm_sk->dst_port);
1481                 mutex_unlock(&bnx2i_conn->ep->hba->net_dev_lock);
1482                 break;
1483         case ISCSI_PARAM_CONN_ADDRESS:
1484                 mutex_lock(&bnx2i_conn->ep->hba->net_dev_lock);
1485                 if (bnx2i_conn->ep->cm_sk)
1486                         len = sprintf(buf, "%pI4\n",
1487                                       &bnx2i_conn->ep->cm_sk->dst_ip);
1488                 mutex_unlock(&bnx2i_conn->ep->hba->net_dev_lock);
1489                 break;
1490         default:
1491                 return iscsi_conn_get_param(cls_conn, param, buf);
1492         }
1493 out:
1494         return len;
1495 }
1496
1497 /**
1498  * bnx2i_host_get_param - returns host (adapter) related parameters
1499  * @shost:      scsi host pointer
1500  * @param:      parameter type identifier
1501  * @buf:        buffer pointer
1502  */
1503 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1504                                 enum iscsi_host_param param, char *buf)
1505 {
1506         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1507         int len = 0;
1508
1509         switch (param) {
1510         case ISCSI_HOST_PARAM_HWADDRESS:
1511                 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1512                 break;
1513         case ISCSI_HOST_PARAM_NETDEV_NAME:
1514                 len = sprintf(buf, "%s\n", hba->netdev->name);
1515                 break;
1516         case ISCSI_HOST_PARAM_IPADDRESS: {
1517                 struct list_head *active_list = &hba->ep_active_list;
1518
1519                 read_lock_bh(&hba->ep_rdwr_lock);
1520                 if (!list_empty(&hba->ep_active_list)) {
1521                         struct bnx2i_endpoint *bnx2i_ep;
1522                         struct cnic_sock *csk;
1523
1524                         bnx2i_ep = list_first_entry(active_list,
1525                                                     struct bnx2i_endpoint,
1526                                                     link);
1527                         csk = bnx2i_ep->cm_sk;
1528                         if (test_bit(SK_F_IPV6, &csk->flags))
1529                                 len = sprintf(buf, "%pI6\n", csk->src_ip);
1530                         else
1531                                 len = sprintf(buf, "%pI4\n", csk->src_ip);
1532                 }
1533                 read_unlock_bh(&hba->ep_rdwr_lock);
1534                 break;
1535         }
1536         default:
1537                 return iscsi_host_get_param(shost, param, buf);
1538         }
1539         return len;
1540 }
1541
1542 /**
1543  * bnx2i_conn_start - completes iscsi connection migration to FFP
1544  * @cls_conn:   pointer to iscsi cls conn
1545  *
1546  * last call in FFP migration to handover iscsi conn to the driver
1547  */
1548 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1549 {
1550         struct iscsi_conn *conn = cls_conn->dd_data;
1551         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1552
1553         bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1554         bnx2i_update_iscsi_conn(conn);
1555
1556         /*
1557          * this should normally not sleep for a long time so it should
1558          * not disrupt the caller.
1559          */
1560         bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1561         bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1562         bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1563         add_timer(&bnx2i_conn->ep->ofld_timer);
1564         /* update iSCSI context for this conn, wait for CNIC to complete */
1565         wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1566                         bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1567
1568         if (signal_pending(current))
1569                 flush_signals(current);
1570         del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1571
1572         iscsi_conn_start(cls_conn);
1573         return 0;
1574 }
1575
1576
1577 /**
1578  * bnx2i_conn_get_stats - returns iSCSI stats
1579  * @cls_conn:   pointer to iscsi cls conn
1580  * @stats:      pointer to iscsi statistic struct
1581  */
1582 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1583                                  struct iscsi_stats *stats)
1584 {
1585         struct iscsi_conn *conn = cls_conn->dd_data;
1586
1587         stats->txdata_octets = conn->txdata_octets;
1588         stats->rxdata_octets = conn->rxdata_octets;
1589         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1590         stats->dataout_pdus = conn->dataout_pdus_cnt;
1591         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1592         stats->datain_pdus = conn->datain_pdus_cnt;
1593         stats->r2t_pdus = conn->r2t_pdus_cnt;
1594         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1595         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1596         stats->custom_length = 3;
1597         strcpy(stats->custom[2].desc, "eh_abort_cnt");
1598         stats->custom[2].value = conn->eh_abort_cnt;
1599         stats->digest_err = 0;
1600         stats->timeout_err = 0;
1601         stats->custom_length = 0;
1602 }
1603
1604
1605 /**
1606  * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1607  * @dst_addr:   target IP address
1608  *
1609  * check if route resolves to BNX2 device
1610  */
1611 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1612 {
1613         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1614         struct bnx2i_hba *hba;
1615         struct cnic_dev *cnic = NULL;
1616
1617         hba = get_adapter_list_head();
1618         if (hba && hba->cnic)
1619                 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1620         if (!cnic) {
1621                 printk(KERN_ALERT "bnx2i: no route,"
1622                        "can't connect using cnic\n");
1623                 goto no_nx2_route;
1624         }
1625         hba = bnx2i_find_hba_for_cnic(cnic);
1626         if (!hba)
1627                 goto no_nx2_route;
1628
1629         if (bnx2i_adapter_ready(hba)) {
1630                 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1631                 goto no_nx2_route;
1632         }
1633         if (hba->netdev->mtu > hba->mtu_supported) {
1634                 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1635                                   hba->netdev->name, hba->netdev->mtu);
1636                 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1637                                   hba->mtu_supported);
1638                 goto no_nx2_route;
1639         }
1640         return hba;
1641 no_nx2_route:
1642         return NULL;
1643 }
1644
1645
1646 /**
1647  * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1648  * @hba:        pointer to adapter instance
1649  * @ep:         endpoint (transport indentifier) structure
1650  *
1651  * destroys cm_sock structure and on chip iscsi context
1652  */
1653 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1654                                  struct bnx2i_endpoint *ep)
1655 {
1656         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)
1657                 hba->cnic->cm_destroy(ep->cm_sk);
1658
1659         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1660             ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1661                 if (ep->conn && ep->conn->cls_conn &&
1662                     ep->conn->cls_conn->dd_data) {
1663                         struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;
1664
1665                         /* Must suspend all rx queue activity for this ep */
1666                         set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
1667                 }
1668                 /* CONN_DISCONNECT timeout may or may not be an issue depending
1669                  * on what transcribed in TCP layer, different targets behave
1670                  * differently
1671                  */
1672                 printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "
1673                                   "please submit GRC Dump, NW/PCIe trace, "
1674                                   "driver msgs to developers for analysis\n",
1675                                   hba->netdev->name);
1676         }
1677
1678         ep->state = EP_STATE_CLEANUP_START;
1679         init_timer(&ep->ofld_timer);
1680         ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
1681         ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1682         ep->ofld_timer.data = (unsigned long) ep;
1683         add_timer(&ep->ofld_timer);
1684
1685         bnx2i_ep_destroy_list_add(hba, ep);
1686
1687         /* destroy iSCSI context, wait for it to complete */
1688         if (bnx2i_send_conn_destroy(hba, ep))
1689                 ep->state = EP_STATE_CLEANUP_CMPL;
1690
1691         wait_event_interruptible(ep->ofld_wait,
1692                                  (ep->state != EP_STATE_CLEANUP_START));
1693
1694         if (signal_pending(current))
1695                 flush_signals(current);
1696         del_timer_sync(&ep->ofld_timer);
1697
1698         bnx2i_ep_destroy_list_del(hba, ep);
1699
1700         if (ep->state != EP_STATE_CLEANUP_CMPL)
1701                 /* should never happen */
1702                 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1703
1704         return 0;
1705 }
1706
1707
1708 /**
1709  * bnx2i_ep_connect - establish TCP connection to target portal
1710  * @shost:              scsi host
1711  * @dst_addr:           target IP address
1712  * @non_blocking:       blocking or non-blocking call
1713  *
1714  * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1715  *      with l5_core and the CNIC. This is a multi-step process of resolving
1716  *      route to target, create a iscsi connection context, handshaking with
1717  *      CNIC module to create/initialize the socket struct and finally
1718  *      sending down option-2 request to complete TCP 3-way handshake
1719  */
1720 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1721                                                struct sockaddr *dst_addr,
1722                                                int non_blocking)
1723 {
1724         u32 iscsi_cid = BNX2I_CID_RESERVED;
1725         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1726         struct sockaddr_in6 *desti6;
1727         struct bnx2i_endpoint *bnx2i_ep;
1728         struct bnx2i_hba *hba;
1729         struct cnic_dev *cnic;
1730         struct cnic_sockaddr saddr;
1731         struct iscsi_endpoint *ep;
1732         int rc = 0;
1733
1734         if (shost) {
1735                 /* driver is given scsi host to work with */
1736                 hba = iscsi_host_priv(shost);
1737         } else
1738                 /*
1739                  * check if the given destination can be reached through
1740                  * a iscsi capable NetXtreme2 device
1741                  */
1742                 hba = bnx2i_check_route(dst_addr);
1743
1744         if (!hba) {
1745                 rc = -EINVAL;
1746                 goto nohba;
1747         }
1748         mutex_lock(&hba->net_dev_lock);
1749
1750         if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) {
1751                 rc = -EPERM;
1752                 goto check_busy;
1753         }
1754         cnic = hba->cnic;
1755         ep = bnx2i_alloc_ep(hba);
1756         if (!ep) {
1757                 rc = -ENOMEM;
1758                 goto check_busy;
1759         }
1760         bnx2i_ep = ep->dd_data;
1761
1762         bnx2i_ep->num_active_cmds = 0;
1763         iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1764         if (iscsi_cid == -1) {
1765                 printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate "
1766                         "iscsi cid\n", hba->netdev->name);
1767                 rc = -ENOMEM;
1768                 bnx2i_free_ep(ep);
1769                 goto check_busy;
1770         }
1771         bnx2i_ep->hba_age = hba->age;
1772
1773         rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1774         if (rc != 0) {
1775                 printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error"
1776                         "\n", hba->netdev->name);
1777                 rc = -ENOMEM;
1778                 goto qp_resc_err;
1779         }
1780
1781         bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1782         bnx2i_ep->state = EP_STATE_OFLD_START;
1783         bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1784
1785         init_timer(&bnx2i_ep->ofld_timer);
1786         bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1787         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1788         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1789         add_timer(&bnx2i_ep->ofld_timer);
1790
1791         if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) {
1792                 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1793                         printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1794                                 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1795                         rc = -EBUSY;
1796                 } else
1797                         rc = -ENOSPC;
1798                 printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe"
1799                         "\n", hba->netdev->name);
1800                 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1801                 goto conn_failed;
1802         }
1803
1804         /* Wait for CNIC hardware to setup conn context and return 'cid' */
1805         wait_event_interruptible(bnx2i_ep->ofld_wait,
1806                                  bnx2i_ep->state != EP_STATE_OFLD_START);
1807
1808         if (signal_pending(current))
1809                 flush_signals(current);
1810         del_timer_sync(&bnx2i_ep->ofld_timer);
1811
1812         bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1813
1814         if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1815                 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1816                         printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1817                                 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1818                         rc = -EBUSY;
1819                 } else
1820                         rc = -ENOSPC;
1821                 goto conn_failed;
1822         }
1823
1824         rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1825                              iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1826         if (rc) {
1827                 rc = -EINVAL;
1828                 /* Need to terminate and cleanup the connection */
1829                 goto release_ep;
1830         }
1831
1832         bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1833         bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1834         clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1835
1836         memset(&saddr, 0, sizeof(saddr));
1837         if (dst_addr->sa_family == AF_INET) {
1838                 desti = (struct sockaddr_in *) dst_addr;
1839                 saddr.remote.v4 = *desti;
1840                 saddr.local.v4.sin_family = desti->sin_family;
1841         } else if (dst_addr->sa_family == AF_INET6) {
1842                 desti6 = (struct sockaddr_in6 *) dst_addr;
1843                 saddr.remote.v6 = *desti6;
1844                 saddr.local.v6.sin6_family = desti6->sin6_family;
1845         }
1846
1847         bnx2i_ep->timestamp = jiffies;
1848         bnx2i_ep->state = EP_STATE_CONNECT_START;
1849         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1850                 rc = -EINVAL;
1851                 goto conn_failed;
1852         } else
1853                 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1854         if (rc)
1855                 goto release_ep;
1856
1857         bnx2i_ep_active_list_add(hba, bnx2i_ep);
1858
1859         if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1860                 goto del_active_ep;
1861
1862         mutex_unlock(&hba->net_dev_lock);
1863         return ep;
1864
1865 del_active_ep:
1866         bnx2i_ep_active_list_del(hba, bnx2i_ep);
1867 release_ep:
1868         if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1869                 mutex_unlock(&hba->net_dev_lock);
1870                 return ERR_PTR(rc);
1871         }
1872 conn_failed:
1873         bnx2i_free_qp_resc(hba, bnx2i_ep);
1874 qp_resc_err:
1875         bnx2i_free_ep(ep);
1876 check_busy:
1877         mutex_unlock(&hba->net_dev_lock);
1878 nohba:
1879         return ERR_PTR(rc);
1880 }
1881
1882
1883 /**
1884  * bnx2i_ep_poll - polls for TCP connection establishement
1885  * @ep:                 TCP connection (endpoint) handle
1886  * @timeout_ms:         timeout value in milli secs
1887  *
1888  * polls for TCP connect request to complete
1889  */
1890 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1891 {
1892         struct bnx2i_endpoint *bnx2i_ep;
1893         int rc = 0;
1894
1895         bnx2i_ep = ep->dd_data;
1896         if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1897             (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1898             (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1899                 return -1;
1900         if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1901                 return 1;
1902
1903         rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1904                                               ((bnx2i_ep->state ==
1905                                                 EP_STATE_OFLD_FAILED) ||
1906                                                (bnx2i_ep->state ==
1907                                                 EP_STATE_CONNECT_FAILED) ||
1908                                                (bnx2i_ep->state ==
1909                                                 EP_STATE_CONNECT_COMPL)),
1910                                               msecs_to_jiffies(timeout_ms));
1911         if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
1912                 rc = -1;
1913
1914         if (rc > 0)
1915                 return 1;
1916         else if (!rc)
1917                 return 0;       /* timeout */
1918         else
1919                 return rc;
1920 }
1921
1922
1923 /**
1924  * bnx2i_ep_tcp_conn_active - check EP state transition
1925  * @ep:         endpoint pointer
1926  *
1927  * check if underlying TCP connection is active
1928  */
1929 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1930 {
1931         int ret;
1932         int cnic_dev_10g = 0;
1933
1934         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1935                 cnic_dev_10g = 1;
1936
1937         switch (bnx2i_ep->state) {
1938         case EP_STATE_CLEANUP_FAILED:
1939         case EP_STATE_OFLD_FAILED:
1940         case EP_STATE_DISCONN_TIMEDOUT:
1941                 ret = 0;
1942                 break;
1943         case EP_STATE_CONNECT_START:
1944         case EP_STATE_CONNECT_FAILED:
1945         case EP_STATE_CONNECT_COMPL:
1946         case EP_STATE_ULP_UPDATE_START:
1947         case EP_STATE_ULP_UPDATE_COMPL:
1948         case EP_STATE_TCP_FIN_RCVD:
1949         case EP_STATE_LOGOUT_SENT:
1950         case EP_STATE_LOGOUT_RESP_RCVD:
1951         case EP_STATE_ULP_UPDATE_FAILED:
1952                 ret = 1;
1953                 break;
1954         case EP_STATE_TCP_RST_RCVD:
1955                 if (cnic_dev_10g)
1956                         ret = 0;
1957                 else
1958                         ret = 1;
1959                 break;
1960         default:
1961                 ret = 0;
1962         }
1963
1964         return ret;
1965 }
1966
1967
1968 /*
1969  * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
1970  * @ep:         TCP connection (bnx2i endpoint) handle
1971  *
1972  * executes  TCP connection teardown process
1973  */
1974 int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
1975 {
1976         struct bnx2i_hba *hba = bnx2i_ep->hba;
1977         struct cnic_dev *cnic;
1978         struct iscsi_session *session = NULL;
1979         struct iscsi_conn *conn = NULL;
1980         int ret = 0;
1981         int close = 0;
1982         int close_ret = 0;
1983
1984         if (!hba)
1985                 return 0;
1986
1987         cnic = hba->cnic;
1988         if (!cnic)
1989                 return 0;
1990
1991         if (bnx2i_ep->state == EP_STATE_IDLE ||
1992             bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
1993                 return 0;
1994
1995         if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
1996                 goto destroy_conn;
1997
1998         if (bnx2i_ep->conn) {
1999                 conn = bnx2i_ep->conn->cls_conn->dd_data;
2000                 session = conn->session;
2001         }
2002
2003         init_timer(&bnx2i_ep->ofld_timer);
2004         bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
2005         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
2006         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
2007         add_timer(&bnx2i_ep->ofld_timer);
2008
2009         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
2010                 goto out;
2011
2012         if (session) {
2013                 spin_lock_bh(&session->lock);
2014                 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
2015                         if (session->state == ISCSI_STATE_LOGGING_OUT) {
2016                                 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
2017                                         /* Logout sent, but no resp */
2018                                         printk(KERN_ALERT "bnx2i (%s): WARNING"
2019                                                 " logout response was not "
2020                                                 "received!\n",
2021                                                 bnx2i_ep->hba->netdev->name);
2022                                 } else if (bnx2i_ep->state ==
2023                                            EP_STATE_LOGOUT_RESP_RCVD)
2024                                         close = 1;
2025                         }
2026                 } else
2027                         close = 1;
2028
2029                 spin_unlock_bh(&session->lock);
2030         }
2031
2032         bnx2i_ep->state = EP_STATE_DISCONN_START;
2033
2034         if (close)
2035                 close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
2036         else
2037                 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);
2038
2039         if (close_ret)
2040                 printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n",
2041                         bnx2i_ep->hba->netdev->name, close, close_ret);
2042         else
2043                 /* wait for option-2 conn teardown */
2044                 wait_event_interruptible(bnx2i_ep->ofld_wait,
2045                                  bnx2i_ep->state != EP_STATE_DISCONN_START);
2046
2047         if (signal_pending(current))
2048                 flush_signals(current);
2049         del_timer_sync(&bnx2i_ep->ofld_timer);
2050
2051 destroy_conn:
2052         bnx2i_ep_active_list_del(hba, bnx2i_ep);
2053         if (bnx2i_tear_down_conn(hba, bnx2i_ep))
2054                 return -EINVAL;
2055 out:
2056         bnx2i_ep->state = EP_STATE_IDLE;
2057         return ret;
2058 }
2059
2060
2061 /**
2062  * bnx2i_ep_disconnect - executes TCP connection teardown process
2063  * @ep:         TCP connection (iscsi endpoint) handle
2064  *
2065  * executes  TCP connection teardown process
2066  */
2067 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
2068 {
2069         struct bnx2i_endpoint *bnx2i_ep;
2070         struct bnx2i_conn *bnx2i_conn = NULL;
2071         struct iscsi_conn *conn = NULL;
2072         struct bnx2i_hba *hba;
2073
2074         bnx2i_ep = ep->dd_data;
2075
2076         /* driver should not attempt connection cleanup until TCP_CONNECT
2077          * completes either successfully or fails. Timeout is 9-secs, so
2078          * wait for it to complete
2079          */
2080         while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
2081                 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
2082                 msleep(250);
2083
2084         if (bnx2i_ep->conn) {
2085                 bnx2i_conn = bnx2i_ep->conn;
2086                 conn = bnx2i_conn->cls_conn->dd_data;
2087                 iscsi_suspend_queue(conn);
2088         }
2089         hba = bnx2i_ep->hba;
2090
2091         mutex_lock(&hba->net_dev_lock);
2092
2093         if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2094                 goto out;
2095
2096         if (bnx2i_ep->state == EP_STATE_IDLE)
2097                 goto free_resc;
2098
2099         if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
2100             (bnx2i_ep->hba_age != hba->age)) {
2101                 bnx2i_ep_active_list_del(hba, bnx2i_ep);
2102                 goto free_resc;
2103         }
2104
2105         /* Do all chip cleanup here */
2106         if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {
2107                 mutex_unlock(&hba->net_dev_lock);
2108                 return;
2109         }
2110 free_resc:
2111         bnx2i_free_qp_resc(hba, bnx2i_ep);
2112
2113         if (bnx2i_conn)
2114                 bnx2i_conn->ep = NULL;
2115
2116         bnx2i_free_ep(ep);
2117 out:
2118         mutex_unlock(&hba->net_dev_lock);
2119
2120         wake_up_interruptible(&hba->eh_wait);
2121 }
2122
2123
2124 /**
2125  * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2126  * @buf:        pointer to buffer containing iscsi path message
2127  *
2128  */
2129 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
2130 {
2131         struct bnx2i_hba *hba = iscsi_host_priv(shost);
2132         char *buf = (char *) params;
2133         u16 len = sizeof(*params);
2134
2135         /* handled by cnic driver */
2136         hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
2137                                      len);
2138
2139         return 0;
2140 }
2141
2142
2143 /*
2144  * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2145  * used while registering with the scsi host and iSCSI transport module.
2146  */
2147 static struct scsi_host_template bnx2i_host_template = {
2148         .module                 = THIS_MODULE,
2149         .name                   = "Broadcom Offload iSCSI Initiator",
2150         .proc_name              = "bnx2i",
2151         .queuecommand           = iscsi_queuecommand,
2152         .eh_abort_handler       = iscsi_eh_abort,
2153         .eh_device_reset_handler = iscsi_eh_device_reset,
2154         .eh_target_reset_handler = iscsi_eh_recover_target,
2155         .change_queue_depth     = iscsi_change_queue_depth,
2156         .can_queue              = 1024,
2157         .max_sectors            = 127,
2158         .cmd_per_lun            = 32,
2159         .this_id                = -1,
2160         .use_clustering         = ENABLE_CLUSTERING,
2161         .sg_tablesize           = ISCSI_MAX_BDS_PER_CMD,
2162         .shost_attrs            = bnx2i_dev_attributes,
2163 };
2164
2165 struct iscsi_transport bnx2i_iscsi_transport = {
2166         .owner                  = THIS_MODULE,
2167         .name                   = "bnx2i",
2168         .caps                   = CAP_RECOVERY_L0 | CAP_HDRDGST |
2169                                   CAP_MULTI_R2T | CAP_DATADGST |
2170                                   CAP_DATA_PATH_OFFLOAD,
2171         .param_mask             = ISCSI_MAX_RECV_DLENGTH |
2172                                   ISCSI_MAX_XMIT_DLENGTH |
2173                                   ISCSI_HDRDGST_EN |
2174                                   ISCSI_DATADGST_EN |
2175                                   ISCSI_INITIAL_R2T_EN |
2176                                   ISCSI_MAX_R2T |
2177                                   ISCSI_IMM_DATA_EN |
2178                                   ISCSI_FIRST_BURST |
2179                                   ISCSI_MAX_BURST |
2180                                   ISCSI_PDU_INORDER_EN |
2181                                   ISCSI_DATASEQ_INORDER_EN |
2182                                   ISCSI_ERL |
2183                                   ISCSI_CONN_PORT |
2184                                   ISCSI_CONN_ADDRESS |
2185                                   ISCSI_EXP_STATSN |
2186                                   ISCSI_PERSISTENT_PORT |
2187                                   ISCSI_PERSISTENT_ADDRESS |
2188                                   ISCSI_TARGET_NAME | ISCSI_TPGT |
2189                                   ISCSI_USERNAME | ISCSI_PASSWORD |
2190                                   ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
2191                                   ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
2192                                   ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
2193                                   ISCSI_PING_TMO | ISCSI_RECV_TMO |
2194                                   ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
2195         .host_param_mask        = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
2196                                   ISCSI_HOST_NETDEV_NAME,
2197         .create_session         = bnx2i_session_create,
2198         .destroy_session        = bnx2i_session_destroy,
2199         .create_conn            = bnx2i_conn_create,
2200         .bind_conn              = bnx2i_conn_bind,
2201         .destroy_conn           = bnx2i_conn_destroy,
2202         .set_param              = iscsi_set_param,
2203         .get_conn_param         = bnx2i_conn_get_param,
2204         .get_session_param      = iscsi_session_get_param,
2205         .get_host_param         = bnx2i_host_get_param,
2206         .start_conn             = bnx2i_conn_start,
2207         .stop_conn              = iscsi_conn_stop,
2208         .send_pdu               = iscsi_conn_send_pdu,
2209         .xmit_task              = bnx2i_task_xmit,
2210         .get_stats              = bnx2i_conn_get_stats,
2211         /* TCP connect - disconnect - option-2 interface calls */
2212         .ep_connect             = bnx2i_ep_connect,
2213         .ep_poll                = bnx2i_ep_poll,
2214         .ep_disconnect          = bnx2i_ep_disconnect,
2215         .set_path               = bnx2i_nl_set_path,
2216         /* Error recovery timeout call */
2217         .session_recovery_timedout = iscsi_session_recovery_timedout,
2218         .cleanup_task           = bnx2i_cleanup_task,
2219 };