kernel/drivers/scsi/bnx2i/bnx2i_iscsi.c

   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
  23 struct scsi_transport_template *bnx2i_scsi_xport_template;
  24 struct iscsi_transport bnx2i_iscsi_transport;
  25 static struct scsi_host_template bnx2i_host_template;
  26
  27 /*
  28  * Global endpoint resource info
  29  */
  30 static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
  31
  32 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
  33
  34 static 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  */
  56 static 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  */
  84 static 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  */
 143 static 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  */
 186 static 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  */
 207 void 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
 217 static 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  */
 238 static 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  */
 258 struct 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  */
 277 static 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  */
 299 static 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  */
 324 static 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  */
 363 static 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  */
 381 static 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  */
 415 static 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  */
 444 static 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  */
 468 static 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  */
 493 static 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
 511 free_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  */
 524 static 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;
 557 out:
 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  */
 568 static 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  */
 594 void 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  */
 606 static 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  */
 623 static 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  */
 640 static 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  */
 656 static 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  */
 673 struct bnx2i_endpoint *
 674 bnx2i_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;
 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  */
 701 struct bnx2i_endpoint *
 702 bnx2i_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;
 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  */
 731 static 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  */
 747 static 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  */
 765 static 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  */
 786 struct 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
 889 free_dump_mem:
 890         bnx2i_release_free_cid_que(hba);
 891 cid_que_err:
 892         bnx2i_free_mp_bdt(hba);
 893 mp_bdt_mem_err:
 894         if (hba->regview) {
 895                 pci_iounmap(hba->pcidev, hba->regview);
 896                 hba->regview = NULL;
 897         }
 898 ioreg_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  */
 910 void 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         pci_dev_put(hba->pcidev);
 919
 920         if (hba->regview) {
 921                 pci_iounmap(hba->pcidev, hba->regview);
 922                 hba->regview = NULL;
 923         }
 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  */
 936 static 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  */
 977 static 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
1018 login_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
1024 login_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;
1029 login_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;
1034 login_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  */
1049 static 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  */
1081 static 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  */
1131 static 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
1158 static 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                 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1177                                 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1178                 spin_lock_bh(&conn->session->back_lock);
1179         }
1180         bnx2i_iscsi_unmap_sg_list(task->dd_data);
1181 }
1182
1183 /**
1184  * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1185  * @conn:       transport layer conn structure pointer
1186  * @task:       transport layer command structure pointer
1187  */
1188 static int
1189 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1190 {
1191         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1192         struct bnx2i_hba *hba = bnx2i_conn->hba;
1193         struct bnx2i_cmd *cmd = task->dd_data;
1194
1195         memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1196
1197         bnx2i_setup_cmd_wqe_template(cmd);
1198         bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1199
1200         /* Tx PDU/data length count */
1201         ADD_STATS_64(hba, tx_pdus, 1);
1202         ADD_STATS_64(hba, tx_bytes, task->data_count);
1203
1204         if (task->data_count) {
1205                 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1206                        task->data_count);
1207                 bnx2i_conn->gen_pdu.req_wr_ptr =
1208                         bnx2i_conn->gen_pdu.req_buf + task->data_count;
1209         }
1210         cmd->conn = conn->dd_data;
1211         cmd->scsi_cmd = NULL;
1212         return bnx2i_iscsi_send_generic_request(task);
1213 }
1214
1215 /**
1216  * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1217  * @task:       transport layer command structure pointer
1218  *
1219  * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1220  */
1221 static int bnx2i_task_xmit(struct iscsi_task *task)
1222 {
1223         struct iscsi_conn *conn = task->conn;
1224         struct iscsi_session *session = conn->session;
1225         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1226         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1227         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1228         struct scsi_cmnd *sc = task->sc;
1229         struct bnx2i_cmd *cmd = task->dd_data;
1230         struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
1231
1232         if (atomic_read(&bnx2i_conn->ep->num_active_cmds) + 1  >
1233             hba->max_sqes)
1234                 return -ENOMEM;
1235
1236         /*
1237          * If there is no scsi_cmnd this must be a mgmt task
1238          */
1239         if (!sc)
1240                 return bnx2i_mtask_xmit(conn, task);
1241
1242         bnx2i_setup_cmd_wqe_template(cmd);
1243         cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1244         cmd->conn = bnx2i_conn;
1245         cmd->scsi_cmd = sc;
1246         cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1247         cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1248
1249         bnx2i_iscsi_map_sg_list(cmd);
1250         bnx2i_cpy_scsi_cdb(sc, cmd);
1251
1252         cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1253         if (sc->sc_data_direction == DMA_TO_DEVICE) {
1254                 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1255                 cmd->req.itt = task->itt |
1256                         (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1257                 bnx2i_setup_write_cmd_bd_info(task);
1258         } else {
1259                 if (scsi_bufflen(sc))
1260                         cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1261                 cmd->req.itt = task->itt |
1262                         (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1263         }
1264
1265         cmd->req.num_bds = cmd->io_tbl.bd_valid;
1266         if (!cmd->io_tbl.bd_valid) {
1267                 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1268                 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1269                 cmd->req.num_bds = 1;
1270         }
1271
1272         bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1273         return 0;
1274 }
1275
1276 /**
1277  * bnx2i_session_create - create a new iscsi session
1278  * @cmds_max:           max commands supported
1279  * @qdepth:             scsi queue depth to support
1280  * @initial_cmdsn:      initial iscsi CMDSN to be used for this session
1281  *
1282  * Creates a new iSCSI session instance on given device.
1283  */
1284 static struct iscsi_cls_session *
1285 bnx2i_session_create(struct iscsi_endpoint *ep,
1286                      uint16_t cmds_max, uint16_t qdepth,
1287                      uint32_t initial_cmdsn)
1288 {
1289         struct Scsi_Host *shost;
1290         struct iscsi_cls_session *cls_session;
1291         struct bnx2i_hba *hba;
1292         struct bnx2i_endpoint *bnx2i_ep;
1293
1294         if (!ep) {
1295                 printk(KERN_ERR "bnx2i: missing ep.\n");
1296                 return NULL;
1297         }
1298
1299         bnx2i_ep = ep->dd_data;
1300         shost = bnx2i_ep->hba->shost;
1301         hba = iscsi_host_priv(shost);
1302         if (bnx2i_adapter_ready(hba))
1303                 return NULL;
1304
1305         /*
1306          * user can override hw limit as long as it is within
1307          * the min/max.
1308          */
1309         if (cmds_max > hba->max_sqes)
1310                 cmds_max = hba->max_sqes;
1311         else if (cmds_max < BNX2I_SQ_WQES_MIN)
1312                 cmds_max = BNX2I_SQ_WQES_MIN;
1313
1314         cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1315                                           cmds_max, 0, sizeof(struct bnx2i_cmd),
1316                                           initial_cmdsn, ISCSI_MAX_TARGET);
1317         if (!cls_session)
1318                 return NULL;
1319
1320         if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1321                 goto session_teardown;
1322         return cls_session;
1323
1324 session_teardown:
1325         iscsi_session_teardown(cls_session);
1326         return NULL;
1327 }
1328
1329
1330 /**
1331  * bnx2i_session_destroy - destroys iscsi session
1332  * @cls_session:        pointer to iscsi cls session
1333  *
1334  * Destroys previously created iSCSI session instance and releases
1335  *      all resources held by it
1336  */
1337 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1338 {
1339         struct iscsi_session *session = cls_session->dd_data;
1340         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1341         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1342
1343         bnx2i_destroy_cmd_pool(hba, session);
1344         iscsi_session_teardown(cls_session);
1345 }
1346
1347
1348 /**
1349  * bnx2i_conn_create - create iscsi connection instance
1350  * @cls_session:        pointer to iscsi cls session
1351  * @cid:                iscsi cid as per rfc (not NX2's CID terminology)
1352  *
1353  * Creates a new iSCSI connection instance for a given session
1354  */
1355 static struct iscsi_cls_conn *
1356 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1357 {
1358         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1359         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1360         struct bnx2i_conn *bnx2i_conn;
1361         struct iscsi_cls_conn *cls_conn;
1362         struct iscsi_conn *conn;
1363
1364         cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1365                                     cid);
1366         if (!cls_conn)
1367                 return NULL;
1368         conn = cls_conn->dd_data;
1369
1370         bnx2i_conn = conn->dd_data;
1371         bnx2i_conn->cls_conn = cls_conn;
1372         bnx2i_conn->hba = hba;
1373
1374         atomic_set(&bnx2i_conn->work_cnt, 0);
1375
1376         /* 'ep' ptr will be assigned in bind() call */
1377         bnx2i_conn->ep = NULL;
1378         init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1379
1380         if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1381                 iscsi_conn_printk(KERN_ALERT, conn,
1382                                   "conn_new: login resc alloc failed!!\n");
1383                 goto free_conn;
1384         }
1385
1386         return cls_conn;
1387
1388 free_conn:
1389         iscsi_conn_teardown(cls_conn);
1390         return NULL;
1391 }
1392
1393 /**
1394  * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1395  * @cls_session:        pointer to iscsi cls session
1396  * @cls_conn:           pointer to iscsi cls conn
1397  * @transport_fd:       64-bit EP handle
1398  * @is_leading:         leading connection on this session?
1399  *
1400  * Binds together iSCSI session instance, iSCSI connection instance
1401  *      and the TCP connection. This routine returns error code if
1402  *      TCP connection does not belong on the device iSCSI sess/conn
1403  *      is bound
1404  */
1405 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1406                            struct iscsi_cls_conn *cls_conn,
1407                            uint64_t transport_fd, int is_leading)
1408 {
1409         struct iscsi_conn *conn = cls_conn->dd_data;
1410         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1411         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1412         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1413         struct bnx2i_endpoint *bnx2i_ep;
1414         struct iscsi_endpoint *ep;
1415         int ret_code;
1416
1417         ep = iscsi_lookup_endpoint(transport_fd);
1418         if (!ep)
1419                 return -EINVAL;
1420         /*
1421          * Forcefully terminate all in progress connection recovery at the
1422          * earliest, either in bind(), send_pdu(LOGIN), or conn_start()
1423          */
1424         if (bnx2i_adapter_ready(hba))
1425                 return -EIO;
1426
1427         bnx2i_ep = ep->dd_data;
1428         if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1429             (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1430                 /* Peer disconnect via' FIN or RST */
1431                 return -EINVAL;
1432
1433         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1434                 return -EINVAL;
1435
1436         if (bnx2i_ep->hba != hba) {
1437                 /* Error - TCP connection does not belong to this device
1438                  */
1439                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1440                                   "conn bind, ep=0x%p (%s) does not",
1441                                   bnx2i_ep, bnx2i_ep->hba->netdev->name);
1442                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1443                                   "belong to hba (%s)\n",
1444                                   hba->netdev->name);
1445                 return -EEXIST;
1446         }
1447         bnx2i_ep->conn = bnx2i_conn;
1448         bnx2i_conn->ep = bnx2i_ep;
1449         bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1450         bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1451
1452         ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1453                                                 bnx2i_ep->ep_iscsi_cid);
1454
1455         /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1456          * driver needs to explicitly replenish RQ index during setup.
1457          */
1458         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1459                 bnx2i_put_rq_buf(bnx2i_conn, 0);
1460
1461         bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1462         return ret_code;
1463 }
1464
1465
1466 /**
1467  * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1468  * @cls_conn:   pointer to iscsi cls conn
1469  *
1470  * Destroy an iSCSI connection instance and release memory resources held by
1471  *      this connection
1472  */
1473 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1474 {
1475         struct iscsi_conn *conn = cls_conn->dd_data;
1476         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1477         struct Scsi_Host *shost;
1478         struct bnx2i_hba *hba;
1479         struct bnx2i_work *work, *tmp;
1480         unsigned cpu = 0;
1481         struct bnx2i_percpu_s *p;
1482
1483         shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1484         hba = iscsi_host_priv(shost);
1485
1486         bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1487
1488         if (atomic_read(&bnx2i_conn->work_cnt)) {
1489                 for_each_online_cpu(cpu) {
1490                         p = &per_cpu(bnx2i_percpu, cpu);
1491                         spin_lock_bh(&p->p_work_lock);
1492                         list_for_each_entry_safe(work, tmp,
1493                                                  &p->work_list, list) {
1494                                 if (work->session == conn->session &&
1495                                     work->bnx2i_conn == bnx2i_conn) {
1496                                         list_del_init(&work->list);
1497                                         kfree(work);
1498                                         if (!atomic_dec_and_test(
1499                                                         &bnx2i_conn->work_cnt))
1500                                                 break;
1501                                 }
1502                         }
1503                         spin_unlock_bh(&p->p_work_lock);
1504                 }
1505         }
1506
1507         iscsi_conn_teardown(cls_conn);
1508 }
1509
1510
1511 /**
1512  * bnx2i_ep_get_param - return iscsi ep parameter to caller
1513  * @ep:         pointer to iscsi endpoint
1514  * @param:      parameter type identifier
1515  * @buf:        buffer pointer
1516  *
1517  * returns iSCSI ep parameters
1518  */
1519 static int bnx2i_ep_get_param(struct iscsi_endpoint *ep,
1520                               enum iscsi_param param, char *buf)
1521 {
1522         struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
1523         struct bnx2i_hba *hba = bnx2i_ep->hba;
1524         int len = -ENOTCONN;
1525
1526         if (!hba)
1527                 return -ENOTCONN;
1528
1529         switch (param) {
1530         case ISCSI_PARAM_CONN_PORT:
1531                 mutex_lock(&hba->net_dev_lock);
1532                 if (bnx2i_ep->cm_sk)
1533                         len = sprintf(buf, "%hu\n", bnx2i_ep->cm_sk->dst_port);
1534                 mutex_unlock(&hba->net_dev_lock);
1535                 break;
1536         case ISCSI_PARAM_CONN_ADDRESS:
1537                 mutex_lock(&hba->net_dev_lock);
1538                 if (bnx2i_ep->cm_sk)
1539                         len = sprintf(buf, "%pI4\n", &bnx2i_ep->cm_sk->dst_ip);
1540                 mutex_unlock(&hba->net_dev_lock);
1541                 break;
1542         default:
1543                 return -ENOSYS;
1544         }
1545
1546         return len;
1547 }
1548
1549 /**
1550  * bnx2i_host_get_param - returns host (adapter) related parameters
1551  * @shost:      scsi host pointer
1552  * @param:      parameter type identifier
1553  * @buf:        buffer pointer
1554  */
1555 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1556                                 enum iscsi_host_param param, char *buf)
1557 {
1558         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1559         int len = 0;
1560
1561         switch (param) {
1562         case ISCSI_HOST_PARAM_HWADDRESS:
1563                 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1564                 break;
1565         case ISCSI_HOST_PARAM_NETDEV_NAME:
1566                 len = sprintf(buf, "%s\n", hba->netdev->name);
1567                 break;
1568         case ISCSI_HOST_PARAM_IPADDRESS: {
1569                 struct list_head *active_list = &hba->ep_active_list;
1570
1571                 read_lock_bh(&hba->ep_rdwr_lock);
1572                 if (!list_empty(&hba->ep_active_list)) {
1573                         struct bnx2i_endpoint *bnx2i_ep;
1574                         struct cnic_sock *csk;
1575
1576                         bnx2i_ep = list_first_entry(active_list,
1577                                                     struct bnx2i_endpoint,
1578                                                     link);
1579                         csk = bnx2i_ep->cm_sk;
1580                         if (test_bit(SK_F_IPV6, &csk->flags))
1581                                 len = sprintf(buf, "%pI6\n", csk->src_ip);
1582                         else
1583                                 len = sprintf(buf, "%pI4\n", csk->src_ip);
1584                 }
1585                 read_unlock_bh(&hba->ep_rdwr_lock);
1586                 break;
1587         }
1588         default:
1589                 return iscsi_host_get_param(shost, param, buf);
1590         }
1591         return len;
1592 }
1593
1594 /**
1595  * bnx2i_conn_start - completes iscsi connection migration to FFP
1596  * @cls_conn:   pointer to iscsi cls conn
1597  *
1598  * last call in FFP migration to handover iscsi conn to the driver
1599  */
1600 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1601 {
1602         struct iscsi_conn *conn = cls_conn->dd_data;
1603         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1604
1605         bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1606         bnx2i_update_iscsi_conn(conn);
1607
1608         /*
1609          * this should normally not sleep for a long time so it should
1610          * not disrupt the caller.
1611          */
1612         bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1613         bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1614         bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1615         add_timer(&bnx2i_conn->ep->ofld_timer);
1616         /* update iSCSI context for this conn, wait for CNIC to complete */
1617         wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1618                         bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1619
1620         if (signal_pending(current))
1621                 flush_signals(current);
1622         del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1623
1624         iscsi_conn_start(cls_conn);
1625         return 0;
1626 }
1627
1628
1629 /**
1630  * bnx2i_conn_get_stats - returns iSCSI stats
1631  * @cls_conn:   pointer to iscsi cls conn
1632  * @stats:      pointer to iscsi statistic struct
1633  */
1634 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1635                                  struct iscsi_stats *stats)
1636 {
1637         struct iscsi_conn *conn = cls_conn->dd_data;
1638
1639         stats->txdata_octets = conn->txdata_octets;
1640         stats->rxdata_octets = conn->rxdata_octets;
1641         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1642         stats->dataout_pdus = conn->dataout_pdus_cnt;
1643         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1644         stats->datain_pdus = conn->datain_pdus_cnt;
1645         stats->r2t_pdus = conn->r2t_pdus_cnt;
1646         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1647         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1648         stats->digest_err = 0;
1649         stats->timeout_err = 0;
1650         strcpy(stats->custom[0].desc, "eh_abort_cnt");
1651         stats->custom[0].value = conn->eh_abort_cnt;
1652         stats->custom_length = 1;
1653 }
1654
1655
1656 /**
1657  * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1658  * @dst_addr:   target IP address
1659  *
1660  * check if route resolves to BNX2 device
1661  */
1662 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1663 {
1664         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1665         struct bnx2i_hba *hba;
1666         struct cnic_dev *cnic = NULL;
1667
1668         hba = get_adapter_list_head();
1669         if (hba && hba->cnic)
1670                 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1671         if (!cnic) {
1672                 printk(KERN_ALERT "bnx2i: no route,"
1673                        "can't connect using cnic\n");
1674                 goto no_nx2_route;
1675         }
1676         hba = bnx2i_find_hba_for_cnic(cnic);
1677         if (!hba)
1678                 goto no_nx2_route;
1679
1680         if (bnx2i_adapter_ready(hba)) {
1681                 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1682                 goto no_nx2_route;
1683         }
1684         if (hba->netdev->mtu > hba->mtu_supported) {
1685                 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1686                                   hba->netdev->name, hba->netdev->mtu);
1687                 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1688                                   hba->mtu_supported);
1689                 goto no_nx2_route;
1690         }
1691         return hba;
1692 no_nx2_route:
1693         return NULL;
1694 }
1695
1696
1697 /**
1698  * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1699  * @hba:        pointer to adapter instance
1700  * @ep:         endpoint (transport identifier) structure
1701  *
1702  * destroys cm_sock structure and on chip iscsi context
1703  */
1704 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1705                                  struct bnx2i_endpoint *ep)
1706 {
1707         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)
1708                 hba->cnic->cm_destroy(ep->cm_sk);
1709
1710         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1711             ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1712                 if (ep->conn && ep->conn->cls_conn &&
1713                     ep->conn->cls_conn->dd_data) {
1714                         struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;
1715
1716                         /* Must suspend all rx queue activity for this ep */
1717                         set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
1718                 }
1719                 /* CONN_DISCONNECT timeout may or may not be an issue depending
1720                  * on what transcribed in TCP layer, different targets behave
1721                  * differently
1722                  */
1723                 printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "
1724                                   "please submit GRC Dump, NW/PCIe trace, "
1725                                   "driver msgs to developers for analysis\n",
1726                                   hba->netdev->name);
1727         }
1728
1729         ep->state = EP_STATE_CLEANUP_START;
1730         init_timer(&ep->ofld_timer);
1731         ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
1732         ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1733         ep->ofld_timer.data = (unsigned long) ep;
1734         add_timer(&ep->ofld_timer);
1735
1736         bnx2i_ep_destroy_list_add(hba, ep);
1737
1738         /* destroy iSCSI context, wait for it to complete */
1739         if (bnx2i_send_conn_destroy(hba, ep))
1740                 ep->state = EP_STATE_CLEANUP_CMPL;
1741
1742         wait_event_interruptible(ep->ofld_wait,
1743                                  (ep->state != EP_STATE_CLEANUP_START));
1744
1745         if (signal_pending(current))
1746                 flush_signals(current);
1747         del_timer_sync(&ep->ofld_timer);
1748
1749         bnx2i_ep_destroy_list_del(hba, ep);
1750
1751         if (ep->state != EP_STATE_CLEANUP_CMPL)
1752                 /* should never happen */
1753                 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1754
1755         return 0;
1756 }
1757
1758
1759 /**
1760  * bnx2i_ep_connect - establish TCP connection to target portal
1761  * @shost:              scsi host
1762  * @dst_addr:           target IP address
1763  * @non_blocking:       blocking or non-blocking call
1764  *
1765  * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1766  *      with l5_core and the CNIC. This is a multi-step process of resolving
1767  *      route to target, create a iscsi connection context, handshaking with
1768  *      CNIC module to create/initialize the socket struct and finally
1769  *      sending down option-2 request to complete TCP 3-way handshake
1770  */
1771 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1772                                                struct sockaddr *dst_addr,
1773                                                int non_blocking)
1774 {
1775         u32 iscsi_cid = BNX2I_CID_RESERVED;
1776         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1777         struct sockaddr_in6 *desti6;
1778         struct bnx2i_endpoint *bnx2i_ep;
1779         struct bnx2i_hba *hba;
1780         struct cnic_dev *cnic;
1781         struct cnic_sockaddr saddr;
1782         struct iscsi_endpoint *ep;
1783         int rc = 0;
1784
1785         if (shost) {
1786                 /* driver is given scsi host to work with */
1787                 hba = iscsi_host_priv(shost);
1788         } else
1789                 /*
1790                  * check if the given destination can be reached through
1791                  * a iscsi capable NetXtreme2 device
1792                  */
1793                 hba = bnx2i_check_route(dst_addr);
1794
1795         if (!hba) {
1796                 rc = -EINVAL;
1797                 goto nohba;
1798         }
1799         mutex_lock(&hba->net_dev_lock);
1800
1801         if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) {
1802                 rc = -EPERM;
1803                 goto check_busy;
1804         }
1805         cnic = hba->cnic;
1806         ep = bnx2i_alloc_ep(hba);
1807         if (!ep) {
1808                 rc = -ENOMEM;
1809                 goto check_busy;
1810         }
1811         bnx2i_ep = ep->dd_data;
1812
1813         atomic_set(&bnx2i_ep->num_active_cmds, 0);
1814         iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1815         if (iscsi_cid == -1) {
1816                 printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate "
1817                         "iscsi cid\n", hba->netdev->name);
1818                 rc = -ENOMEM;
1819                 bnx2i_free_ep(ep);
1820                 goto check_busy;
1821         }
1822         bnx2i_ep->hba_age = hba->age;
1823
1824         rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1825         if (rc != 0) {
1826                 printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error"
1827                         "\n", hba->netdev->name);
1828                 rc = -ENOMEM;
1829                 goto qp_resc_err;
1830         }
1831
1832         bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1833         bnx2i_ep->state = EP_STATE_OFLD_START;
1834         bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1835
1836         init_timer(&bnx2i_ep->ofld_timer);
1837         bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1838         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1839         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1840         add_timer(&bnx2i_ep->ofld_timer);
1841
1842         if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) {
1843                 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1844                         printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1845                                 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1846                         rc = -EBUSY;
1847                 } else
1848                         rc = -ENOSPC;
1849                 printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe"
1850                         "\n", hba->netdev->name);
1851                 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1852                 goto conn_failed;
1853         }
1854
1855         /* Wait for CNIC hardware to setup conn context and return 'cid' */
1856         wait_event_interruptible(bnx2i_ep->ofld_wait,
1857                                  bnx2i_ep->state != EP_STATE_OFLD_START);
1858
1859         if (signal_pending(current))
1860                 flush_signals(current);
1861         del_timer_sync(&bnx2i_ep->ofld_timer);
1862
1863         bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1864
1865         if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1866                 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1867                         printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1868                                 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1869                         rc = -EBUSY;
1870                 } else
1871                         rc = -ENOSPC;
1872                 goto conn_failed;
1873         }
1874
1875         rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1876                              iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1877         if (rc) {
1878                 rc = -EINVAL;
1879                 /* Need to terminate and cleanup the connection */
1880                 goto release_ep;
1881         }
1882
1883         bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1884         bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1885         clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1886
1887         memset(&saddr, 0, sizeof(saddr));
1888         if (dst_addr->sa_family == AF_INET) {
1889                 desti = (struct sockaddr_in *) dst_addr;
1890                 saddr.remote.v4 = *desti;
1891                 saddr.local.v4.sin_family = desti->sin_family;
1892         } else if (dst_addr->sa_family == AF_INET6) {
1893                 desti6 = (struct sockaddr_in6 *) dst_addr;
1894                 saddr.remote.v6 = *desti6;
1895                 saddr.local.v6.sin6_family = desti6->sin6_family;
1896         }
1897
1898         bnx2i_ep->timestamp = jiffies;
1899         bnx2i_ep->state = EP_STATE_CONNECT_START;
1900         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1901                 rc = -EINVAL;
1902                 goto conn_failed;
1903         } else
1904                 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1905         if (rc)
1906                 goto release_ep;
1907
1908         bnx2i_ep_active_list_add(hba, bnx2i_ep);
1909
1910         if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1911                 goto del_active_ep;
1912
1913         mutex_unlock(&hba->net_dev_lock);
1914         return ep;
1915
1916 del_active_ep:
1917         bnx2i_ep_active_list_del(hba, bnx2i_ep);
1918 release_ep:
1919         if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1920                 mutex_unlock(&hba->net_dev_lock);
1921                 return ERR_PTR(rc);
1922         }
1923 conn_failed:
1924         bnx2i_free_qp_resc(hba, bnx2i_ep);
1925 qp_resc_err:
1926         bnx2i_free_ep(ep);
1927 check_busy:
1928         mutex_unlock(&hba->net_dev_lock);
1929 nohba:
1930         return ERR_PTR(rc);
1931 }
1932
1933
1934 /**
1935  * bnx2i_ep_poll - polls for TCP connection establishement
1936  * @ep:                 TCP connection (endpoint) handle
1937  * @timeout_ms:         timeout value in milli secs
1938  *
1939  * polls for TCP connect request to complete
1940  */
1941 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1942 {
1943         struct bnx2i_endpoint *bnx2i_ep;
1944         int rc = 0;
1945
1946         bnx2i_ep = ep->dd_data;
1947         if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1948             (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1949             (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1950                 return -1;
1951         if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1952                 return 1;
1953
1954         rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1955                                               ((bnx2i_ep->state ==
1956                                                 EP_STATE_OFLD_FAILED) ||
1957                                                (bnx2i_ep->state ==
1958                                                 EP_STATE_CONNECT_FAILED) ||
1959                                                (bnx2i_ep->state ==
1960                                                 EP_STATE_CONNECT_COMPL)),
1961                                               msecs_to_jiffies(timeout_ms));
1962         if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
1963                 rc = -1;
1964
1965         if (rc > 0)
1966                 return 1;
1967         else if (!rc)
1968                 return 0;       /* timeout */
1969         else
1970                 return rc;
1971 }
1972
1973
1974 /**
1975  * bnx2i_ep_tcp_conn_active - check EP state transition
1976  * @ep:         endpoint pointer
1977  *
1978  * check if underlying TCP connection is active
1979  */
1980 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1981 {
1982         int ret;
1983         int cnic_dev_10g = 0;
1984
1985         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1986                 cnic_dev_10g = 1;
1987
1988         switch (bnx2i_ep->state) {
1989         case EP_STATE_CLEANUP_FAILED:
1990         case EP_STATE_OFLD_FAILED:
1991         case EP_STATE_DISCONN_TIMEDOUT:
1992                 ret = 0;
1993                 break;
1994         case EP_STATE_CONNECT_START:
1995         case EP_STATE_CONNECT_FAILED:
1996         case EP_STATE_CONNECT_COMPL:
1997         case EP_STATE_ULP_UPDATE_START:
1998         case EP_STATE_ULP_UPDATE_COMPL:
1999         case EP_STATE_TCP_FIN_RCVD:
2000         case EP_STATE_LOGOUT_SENT:
2001         case EP_STATE_LOGOUT_RESP_RCVD:
2002         case EP_STATE_ULP_UPDATE_FAILED:
2003                 ret = 1;
2004                 break;
2005         case EP_STATE_TCP_RST_RCVD:
2006                 if (cnic_dev_10g)
2007                         ret = 0;
2008                 else
2009                         ret = 1;
2010                 break;
2011         default:
2012                 ret = 0;
2013         }
2014
2015         return ret;
2016 }
2017
2018
2019 /*
2020  * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
2021  * @ep:         TCP connection (bnx2i endpoint) handle
2022  *
2023  * executes  TCP connection teardown process
2024  */
2025 int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
2026 {
2027         struct bnx2i_hba *hba = bnx2i_ep->hba;
2028         struct cnic_dev *cnic;
2029         struct iscsi_session *session = NULL;
2030         struct iscsi_conn *conn = NULL;
2031         int ret = 0;
2032         int close = 0;
2033         int close_ret = 0;
2034
2035         if (!hba)
2036                 return 0;
2037
2038         cnic = hba->cnic;
2039         if (!cnic)
2040                 return 0;
2041
2042         if (bnx2i_ep->state == EP_STATE_IDLE ||
2043             bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2044                 return 0;
2045
2046         if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
2047                 goto destroy_conn;
2048
2049         if (bnx2i_ep->conn) {
2050                 conn = bnx2i_ep->conn->cls_conn->dd_data;
2051                 session = conn->session;
2052         }
2053
2054         init_timer(&bnx2i_ep->ofld_timer);
2055         bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
2056         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
2057         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
2058         add_timer(&bnx2i_ep->ofld_timer);
2059
2060         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
2061                 goto out;
2062
2063         if (session) {
2064                 spin_lock_bh(&session->frwd_lock);
2065                 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
2066                         if (session->state == ISCSI_STATE_LOGGING_OUT) {
2067                                 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
2068                                         /* Logout sent, but no resp */
2069                                         printk(KERN_ALERT "bnx2i (%s): WARNING"
2070                                                 " logout response was not "
2071                                                 "received!\n",
2072                                                 bnx2i_ep->hba->netdev->name);
2073                                 } else if (bnx2i_ep->state ==
2074                                            EP_STATE_LOGOUT_RESP_RCVD)
2075                                         close = 1;
2076                         }
2077                 } else
2078                         close = 1;
2079
2080                 spin_unlock_bh(&session->frwd_lock);
2081         }
2082
2083         bnx2i_ep->state = EP_STATE_DISCONN_START;
2084
2085         if (close)
2086                 close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
2087         else
2088                 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);
2089
2090         if (close_ret)
2091                 printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n",
2092                         bnx2i_ep->hba->netdev->name, close, close_ret);
2093         else
2094                 /* wait for option-2 conn teardown */
2095                 wait_event_interruptible(bnx2i_ep->ofld_wait,
2096                                  bnx2i_ep->state != EP_STATE_DISCONN_START);
2097
2098         if (signal_pending(current))
2099                 flush_signals(current);
2100         del_timer_sync(&bnx2i_ep->ofld_timer);
2101
2102 destroy_conn:
2103         bnx2i_ep_active_list_del(hba, bnx2i_ep);
2104         if (bnx2i_tear_down_conn(hba, bnx2i_ep))
2105                 return -EINVAL;
2106 out:
2107         bnx2i_ep->state = EP_STATE_IDLE;
2108         return ret;
2109 }
2110
2111
2112 /**
2113  * bnx2i_ep_disconnect - executes TCP connection teardown process
2114  * @ep:         TCP connection (iscsi endpoint) handle
2115  *
2116  * executes  TCP connection teardown process
2117  */
2118 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
2119 {
2120         struct bnx2i_endpoint *bnx2i_ep;
2121         struct bnx2i_conn *bnx2i_conn = NULL;
2122         struct iscsi_conn *conn = NULL;
2123         struct bnx2i_hba *hba;
2124
2125         bnx2i_ep = ep->dd_data;
2126
2127         /* driver should not attempt connection cleanup until TCP_CONNECT
2128          * completes either successfully or fails. Timeout is 9-secs, so
2129          * wait for it to complete
2130          */
2131         while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
2132                 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
2133                 msleep(250);
2134
2135         if (bnx2i_ep->conn) {
2136                 bnx2i_conn = bnx2i_ep->conn;
2137                 conn = bnx2i_conn->cls_conn->dd_data;
2138                 iscsi_suspend_queue(conn);
2139         }
2140         hba = bnx2i_ep->hba;
2141
2142         mutex_lock(&hba->net_dev_lock);
2143
2144         if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2145                 goto out;
2146
2147         if (bnx2i_ep->state == EP_STATE_IDLE)
2148                 goto free_resc;
2149
2150         if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
2151             (bnx2i_ep->hba_age != hba->age)) {
2152                 bnx2i_ep_active_list_del(hba, bnx2i_ep);
2153                 goto free_resc;
2154         }
2155
2156         /* Do all chip cleanup here */
2157         if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {
2158                 mutex_unlock(&hba->net_dev_lock);
2159                 return;
2160         }
2161 free_resc:
2162         bnx2i_free_qp_resc(hba, bnx2i_ep);
2163
2164         if (bnx2i_conn)
2165                 bnx2i_conn->ep = NULL;
2166
2167         bnx2i_free_ep(ep);
2168 out:
2169         mutex_unlock(&hba->net_dev_lock);
2170
2171         wake_up_interruptible(&hba->eh_wait);
2172 }
2173
2174
2175 /**
2176  * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2177  * @buf:        pointer to buffer containing iscsi path message
2178  *
2179  */
2180 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
2181 {
2182         struct bnx2i_hba *hba = iscsi_host_priv(shost);
2183         char *buf = (char *) params;
2184         u16 len = sizeof(*params);
2185
2186         /* handled by cnic driver */
2187         hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
2188                                      len);
2189
2190         return 0;
2191 }
2192
2193 static umode_t bnx2i_attr_is_visible(int param_type, int param)
2194 {
2195         switch (param_type) {
2196         case ISCSI_HOST_PARAM:
2197                 switch (param) {
2198                 case ISCSI_HOST_PARAM_NETDEV_NAME:
2199                 case ISCSI_HOST_PARAM_HWADDRESS:
2200                 case ISCSI_HOST_PARAM_IPADDRESS:
2201                         return S_IRUGO;
2202                 default:
2203                         return 0;
2204                 }
2205         case ISCSI_PARAM:
2206                 switch (param) {
2207                 case ISCSI_PARAM_MAX_RECV_DLENGTH:
2208                 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
2209                 case ISCSI_PARAM_HDRDGST_EN:
2210                 case ISCSI_PARAM_DATADGST_EN:
2211                 case ISCSI_PARAM_CONN_ADDRESS:
2212                 case ISCSI_PARAM_CONN_PORT:
2213                 case ISCSI_PARAM_EXP_STATSN:
2214                 case ISCSI_PARAM_PERSISTENT_ADDRESS:
2215                 case ISCSI_PARAM_PERSISTENT_PORT:
2216                 case ISCSI_PARAM_PING_TMO:
2217                 case ISCSI_PARAM_RECV_TMO:
2218                 case ISCSI_PARAM_INITIAL_R2T_EN:
2219                 case ISCSI_PARAM_MAX_R2T:
2220                 case ISCSI_PARAM_IMM_DATA_EN:
2221                 case ISCSI_PARAM_FIRST_BURST:
2222                 case ISCSI_PARAM_MAX_BURST:
2223                 case ISCSI_PARAM_PDU_INORDER_EN:
2224                 case ISCSI_PARAM_DATASEQ_INORDER_EN:
2225                 case ISCSI_PARAM_ERL:
2226                 case ISCSI_PARAM_TARGET_NAME:
2227                 case ISCSI_PARAM_TPGT:
2228                 case ISCSI_PARAM_USERNAME:
2229                 case ISCSI_PARAM_PASSWORD:
2230                 case ISCSI_PARAM_USERNAME_IN:
2231                 case ISCSI_PARAM_PASSWORD_IN:
2232                 case ISCSI_PARAM_FAST_ABORT:
2233                 case ISCSI_PARAM_ABORT_TMO:
2234                 case ISCSI_PARAM_LU_RESET_TMO:
2235                 case ISCSI_PARAM_TGT_RESET_TMO:
2236                 case ISCSI_PARAM_IFACE_NAME:
2237                 case ISCSI_PARAM_INITIATOR_NAME:
2238                 case ISCSI_PARAM_BOOT_ROOT:
2239                 case ISCSI_PARAM_BOOT_NIC:
2240                 case ISCSI_PARAM_BOOT_TARGET:
2241                         return S_IRUGO;
2242                 default:
2243                         return 0;
2244                 }
2245         }
2246
2247         return 0;
2248 }
2249
2250 /*
2251  * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2252  * used while registering with the scsi host and iSCSI transport module.
2253  */
2254 static struct scsi_host_template bnx2i_host_template = {
2255         .module                 = THIS_MODULE,
2256         .name                   = "QLogic Offload iSCSI Initiator",
2257         .proc_name              = "bnx2i",
2258         .queuecommand           = iscsi_queuecommand,
2259         .eh_abort_handler       = iscsi_eh_abort,
2260         .eh_device_reset_handler = iscsi_eh_device_reset,
2261         .eh_target_reset_handler = iscsi_eh_recover_target,
2262         .change_queue_depth     = scsi_change_queue_depth,
2263         .target_alloc           = iscsi_target_alloc,
2264         .can_queue              = 2048,
2265         .max_sectors            = 127,
2266         .cmd_per_lun            = 128,
2267         .this_id                = -1,
2268         .use_clustering         = ENABLE_CLUSTERING,
2269         .sg_tablesize           = ISCSI_MAX_BDS_PER_CMD,
2270         .shost_attrs            = bnx2i_dev_attributes,
2271         .track_queue_depth      = 1,
2272 };
2273
2274 struct iscsi_transport bnx2i_iscsi_transport = {
2275         .owner                  = THIS_MODULE,
2276         .name                   = "bnx2i",
2277         .caps                   = CAP_RECOVERY_L0 | CAP_HDRDGST |
2278                                   CAP_MULTI_R2T | CAP_DATADGST |
2279                                   CAP_DATA_PATH_OFFLOAD |
2280                                   CAP_TEXT_NEGO,
2281         .create_session         = bnx2i_session_create,
2282         .destroy_session        = bnx2i_session_destroy,
2283         .create_conn            = bnx2i_conn_create,
2284         .bind_conn              = bnx2i_conn_bind,
2285         .destroy_conn           = bnx2i_conn_destroy,
2286         .attr_is_visible        = bnx2i_attr_is_visible,
2287         .set_param              = iscsi_set_param,
2288         .get_conn_param         = iscsi_conn_get_param,
2289         .get_session_param      = iscsi_session_get_param,
2290         .get_host_param         = bnx2i_host_get_param,
2291         .start_conn             = bnx2i_conn_start,
2292         .stop_conn              = iscsi_conn_stop,
2293         .send_pdu               = iscsi_conn_send_pdu,
2294         .xmit_task              = bnx2i_task_xmit,
2295         .get_stats              = bnx2i_conn_get_stats,
2296         /* TCP connect - disconnect - option-2 interface calls */
2297         .get_ep_param           = bnx2i_ep_get_param,
2298         .ep_connect             = bnx2i_ep_connect,
2299         .ep_poll                = bnx2i_ep_poll,
2300         .ep_disconnect          = bnx2i_ep_disconnect,
2301         .set_path               = bnx2i_nl_set_path,
2302         /* Error recovery timeout call */
2303         .session_recovery_timedout = iscsi_session_recovery_timedout,
2304         .cleanup_task           = bnx2i_cleanup_task,
2305 };