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  * @bnx2i_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  */
 467 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
 468                                    struct iscsi_session *session)
 469 {
 470         int i;
 471
 472         for (i = 0; i < session->cmds_max; i++) {
 473                 struct iscsi_task *task = session->cmds[i];
 474                 struct bnx2i_cmd *cmd = task->dd_data;
 475
 476                 if (cmd->io_tbl.bd_tbl)
 477                         dma_free_coherent(&hba->pcidev->dev,
 478                                           ISCSI_MAX_BDS_PER_CMD *
 479                                           sizeof(struct iscsi_bd),
 480                                           cmd->io_tbl.bd_tbl,
 481                                           cmd->io_tbl.bd_tbl_dma);
 482         }
 483
 484 }
 485
 486
 487 /**
 488  * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
 489  * @hba:        adapter instance pointer
 490  * @session:    iscsi session pointer
 491  */
 492 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
 493                                 struct iscsi_session *session)
 494 {
 495         int i;
 496
 497         for (i = 0; i < session->cmds_max; i++) {
 498                 struct iscsi_task *task = session->cmds[i];
 499                 struct bnx2i_cmd *cmd = task->dd_data;
 500
 501                 task->hdr = &cmd->hdr;
 502                 task->hdr_max = sizeof(struct iscsi_hdr);
 503
 504                 if (bnx2i_alloc_bdt(hba, session, cmd))
 505                         goto free_bdts;
 506         }
 507
 508         return 0;
 509
 510 free_bdts:
 511         bnx2i_destroy_cmd_pool(hba, session);
 512         return -ENOMEM;
 513 }
 514
 515
 516 /**
 517  * bnx2i_setup_mp_bdt - allocate BD table resources
 518  * @hba:        pointer to adapter structure
 519  *
 520  * Allocate memory for dummy buffer and associated BD
 521  * table to be used by middle path (MP) requests
 522  */
 523 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
 524 {
 525         int rc = 0;
 526         struct iscsi_bd *mp_bdt;
 527         u64 addr;
 528
 529         hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 530                                             &hba->mp_bd_dma, GFP_KERNEL);
 531         if (!hba->mp_bd_tbl) {
 532                 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
 533                 rc = -1;
 534                 goto out;
 535         }
 536
 537         hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev,
 538                                                CNIC_PAGE_SIZE,
 539                                                &hba->dummy_buf_dma, GFP_KERNEL);
 540         if (!hba->dummy_buffer) {
 541                 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
 542                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 543                                   hba->mp_bd_tbl, hba->mp_bd_dma);
 544                 hba->mp_bd_tbl = NULL;
 545                 rc = -1;
 546                 goto out;
 547         }
 548
 549         mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
 550         addr = (unsigned long) hba->dummy_buf_dma;
 551         mp_bdt->buffer_addr_lo = addr & 0xffffffff;
 552         mp_bdt->buffer_addr_hi = addr >> 32;
 553         mp_bdt->buffer_length = CNIC_PAGE_SIZE;
 554         mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
 555                         ISCSI_BD_FIRST_IN_BD_CHAIN;
 556 out:
 557         return rc;
 558 }
 559
 560
 561 /**
 562  * bnx2i_free_mp_bdt - releases ITT back to free pool
 563  * @hba:        pointer to adapter instance
 564  *
 565  * free MP dummy buffer and associated BD table
 566  */
 567 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
 568 {
 569         if (hba->mp_bd_tbl) {
 570                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 571                                   hba->mp_bd_tbl, hba->mp_bd_dma);
 572                 hba->mp_bd_tbl = NULL;
 573         }
 574         if (hba->dummy_buffer) {
 575                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 576                                   hba->dummy_buffer, hba->dummy_buf_dma);
 577                 hba->dummy_buffer = NULL;
 578         }
 579         return;
 580 }
 581
 582 /**
 583  * bnx2i_drop_session - notifies iscsid of connection error.
 584  * @cls_session:        iscsi cls session pointer
 585  *
 586  * This notifies iscsid that there is a error, so it can initiate
 587  * recovery.
 588  *
 589  * This relies on caller using the iscsi class iterator so the object
 590  * is refcounted and does not disapper from under us.
 591  */
 592 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
 593 {
 594         iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
 595 }
 596
 597 /**
 598  * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
 599  * @hba:        pointer to adapter instance
 600  * @ep:         pointer to endpoint (transport identifier) structure
 601  *
 602  * EP destroy queue manager
 603  */
 604 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
 605                                      struct bnx2i_endpoint *ep)
 606 {
 607         write_lock_bh(&hba->ep_rdwr_lock);
 608         list_add_tail(&ep->link, &hba->ep_destroy_list);
 609         write_unlock_bh(&hba->ep_rdwr_lock);
 610         return 0;
 611 }
 612
 613 /**
 614  * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
 615  *
 616  * @hba:                pointer to adapter instance
 617  * @ep:                 pointer to endpoint (transport identifier) structure
 618  *
 619  * EP destroy queue manager
 620  */
 621 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
 622                                      struct bnx2i_endpoint *ep)
 623 {
 624         write_lock_bh(&hba->ep_rdwr_lock);
 625         list_del_init(&ep->link);
 626         write_unlock_bh(&hba->ep_rdwr_lock);
 627
 628         return 0;
 629 }
 630
 631 /**
 632  * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
 633  * @hba:        pointer to adapter instance
 634  * @ep:         pointer to endpoint (transport identifier) structure
 635  *
 636  * pending conn offload completion queue manager
 637  */
 638 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
 639                                   struct bnx2i_endpoint *ep)
 640 {
 641         write_lock_bh(&hba->ep_rdwr_lock);
 642         list_add_tail(&ep->link, &hba->ep_ofld_list);
 643         write_unlock_bh(&hba->ep_rdwr_lock);
 644         return 0;
 645 }
 646
 647 /**
 648  * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
 649  * @hba:                pointer to adapter instance
 650  * @ep:                 pointer to endpoint (transport identifier) structure
 651  *
 652  * pending conn offload completion queue manager
 653  */
 654 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
 655                                   struct bnx2i_endpoint *ep)
 656 {
 657         write_lock_bh(&hba->ep_rdwr_lock);
 658         list_del_init(&ep->link);
 659         write_unlock_bh(&hba->ep_rdwr_lock);
 660         return 0;
 661 }
 662
 663
 664 /**
 665  * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
 666  *
 667  * @hba:                pointer to adapter instance
 668  * @iscsi_cid:          iscsi context ID to find
 669  *
 670  */
 671 struct bnx2i_endpoint *
 672 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
 673 {
 674         struct list_head *list;
 675         struct list_head *tmp;
 676         struct bnx2i_endpoint *ep = NULL;
 677
 678         read_lock_bh(&hba->ep_rdwr_lock);
 679         list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
 680                 ep = (struct bnx2i_endpoint *)list;
 681
 682                 if (ep->ep_iscsi_cid == iscsi_cid)
 683                         break;
 684                 ep = NULL;
 685         }
 686         read_unlock_bh(&hba->ep_rdwr_lock);
 687
 688         if (!ep)
 689                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
 690         return ep;
 691 }
 692
 693 /**
 694  * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
 695  * @hba:                pointer to adapter instance
 696  * @iscsi_cid:          iscsi context ID to find
 697  *
 698  */
 699 struct bnx2i_endpoint *
 700 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
 701 {
 702         struct list_head *list;
 703         struct list_head *tmp;
 704         struct bnx2i_endpoint *ep = NULL;
 705
 706         read_lock_bh(&hba->ep_rdwr_lock);
 707         list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
 708                 ep = (struct bnx2i_endpoint *)list;
 709
 710                 if (ep->ep_iscsi_cid == iscsi_cid)
 711                         break;
 712                 ep = NULL;
 713         }
 714         read_unlock_bh(&hba->ep_rdwr_lock);
 715
 716         if (!ep)
 717                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
 718
 719         return ep;
 720 }
 721
 722 /**
 723  * bnx2i_ep_active_list_add - add an entry to ep active list
 724  * @hba:        pointer to adapter instance
 725  * @ep:         pointer to endpoint (transport identifier) structure
 726  *
 727  * current active conn queue manager
 728  */
 729 static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,
 730                                      struct bnx2i_endpoint *ep)
 731 {
 732         write_lock_bh(&hba->ep_rdwr_lock);
 733         list_add_tail(&ep->link, &hba->ep_active_list);
 734         write_unlock_bh(&hba->ep_rdwr_lock);
 735 }
 736
 737
 738 /**
 739  * bnx2i_ep_active_list_del - deletes an entry to ep active list
 740  * @hba:        pointer to adapter instance
 741  * @ep:         pointer to endpoint (transport identifier) structure
 742  *
 743  * current active conn queue manager
 744  */
 745 static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba,
 746                                      struct bnx2i_endpoint *ep)
 747 {
 748         write_lock_bh(&hba->ep_rdwr_lock);
 749         list_del_init(&ep->link);
 750         write_unlock_bh(&hba->ep_rdwr_lock);
 751 }
 752
 753
 754 /**
 755  * bnx2i_setup_host_queue_size - assigns shost->can_queue param
 756  * @hba:        pointer to adapter instance
 757  * @shost:      scsi host pointer
 758  *
 759  * Initializes 'can_queue' parameter based on how many outstanding commands
 760  *      the device can handle. Each device 5708/5709/57710 has different
 761  *      capabilities
 762  */
 763 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
 764                                         struct Scsi_Host *shost)
 765 {
 766         if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
 767                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
 768         else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
 769                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
 770         else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
 771                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
 772         else
 773                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
 774 }
 775
 776
 777 /**
 778  * bnx2i_alloc_hba - allocate and init adapter instance
 779  * @cnic:       cnic device pointer
 780  *
 781  * allocate & initialize adapter structure and call other
 782  *      support routines to do per adapter initialization
 783  */
 784 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
 785 {
 786         struct Scsi_Host *shost;
 787         struct bnx2i_hba *hba;
 788
 789         shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
 790         if (!shost)
 791                 return NULL;
 792         shost->dma_boundary = cnic->pcidev->dma_mask;
 793         shost->transportt = bnx2i_scsi_xport_template;
 794         shost->max_id = ISCSI_MAX_CONNS_PER_HBA - 1;
 795         shost->max_channel = 0;
 796         shost->max_lun = 512;
 797         shost->max_cmd_len = 16;
 798
 799         hba = iscsi_host_priv(shost);
 800         hba->shost = shost;
 801         hba->netdev = cnic->netdev;
 802         /* Get PCI related information and update hba struct members */
 803         hba->pcidev = cnic->pcidev;
 804         pci_dev_get(hba->pcidev);
 805         hba->pci_did = hba->pcidev->device;
 806         hba->pci_vid = hba->pcidev->vendor;
 807         hba->pci_sdid = hba->pcidev->subsystem_device;
 808         hba->pci_svid = hba->pcidev->subsystem_vendor;
 809         hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
 810         hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
 811
 812         bnx2i_identify_device(hba, cnic);
 813         bnx2i_setup_host_queue_size(hba, shost);
 814
 815         hba->reg_base = pci_resource_start(hba->pcidev, 0);
 816         if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
 817                 hba->regview = pci_iomap(hba->pcidev, 0, BNX2_MQ_CONFIG2);
 818                 if (!hba->regview)
 819                         goto ioreg_map_err;
 820         } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 821                 hba->regview = pci_iomap(hba->pcidev, 0, 4096);
 822                 if (!hba->regview)
 823                         goto ioreg_map_err;
 824         }
 825
 826         if (bnx2i_setup_mp_bdt(hba))
 827                 goto mp_bdt_mem_err;
 828
 829         INIT_LIST_HEAD(&hba->ep_ofld_list);
 830         INIT_LIST_HEAD(&hba->ep_active_list);
 831         INIT_LIST_HEAD(&hba->ep_destroy_list);
 832         rwlock_init(&hba->ep_rdwr_lock);
 833
 834         hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
 835
 836         /* different values for 5708/5709/57710 */
 837         hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
 838
 839         if (bnx2i_setup_free_cid_que(hba))
 840                 goto cid_que_err;
 841
 842         /* SQ/RQ/CQ size can be changed via sysfx interface */
 843         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 844                 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
 845                         hba->max_sqes = sq_size;
 846                 else
 847                         hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
 848         } else {        /* 5706/5708/5709 */
 849                 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
 850                         hba->max_sqes = sq_size;
 851                 else
 852                         hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
 853         }
 854
 855         hba->max_rqes = rq_size;
 856         hba->max_cqes = hba->max_sqes + rq_size;
 857         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 858                 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
 859                         hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
 860         } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
 861                 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
 862
 863         hba->num_ccell = hba->max_sqes / 2;
 864
 865         spin_lock_init(&hba->lock);
 866         mutex_init(&hba->net_dev_lock);
 867         init_waitqueue_head(&hba->eh_wait);
 868         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 869                 hba->hba_shutdown_tmo = 30 * HZ;
 870                 hba->conn_teardown_tmo = 20 * HZ;
 871                 hba->conn_ctx_destroy_tmo = 6 * HZ;
 872         } else {        /* 5706/5708/5709 */
 873                 hba->hba_shutdown_tmo = 20 * HZ;
 874                 hba->conn_teardown_tmo = 10 * HZ;
 875                 hba->conn_ctx_destroy_tmo = 2 * HZ;
 876         }
 877
 878 #ifdef CONFIG_32BIT
 879         spin_lock_init(&hba->stat_lock);
 880 #endif
 881         memset(&hba->stats, 0, sizeof(struct iscsi_stats_info));
 882
 883         if (iscsi_host_add(shost, &hba->pcidev->dev))
 884                 goto free_dump_mem;
 885         return hba;
 886
 887 free_dump_mem:
 888         bnx2i_release_free_cid_que(hba);
 889 cid_que_err:
 890         bnx2i_free_mp_bdt(hba);
 891 mp_bdt_mem_err:
 892         if (hba->regview) {
 893                 pci_iounmap(hba->pcidev, hba->regview);
 894                 hba->regview = NULL;
 895         }
 896 ioreg_map_err:
 897         pci_dev_put(hba->pcidev);
 898         scsi_host_put(shost);
 899         return NULL;
 900 }
 901
 902 /**
 903  * bnx2i_free_hba- releases hba structure and resources held by the adapter
 904  * @hba:        pointer to adapter instance
 905  *
 906  * free adapter structure and call various cleanup routines.
 907  */
 908 void bnx2i_free_hba(struct bnx2i_hba *hba)
 909 {
 910         struct Scsi_Host *shost = hba->shost;
 911
 912         iscsi_host_remove(shost);
 913         INIT_LIST_HEAD(&hba->ep_ofld_list);
 914         INIT_LIST_HEAD(&hba->ep_active_list);
 915         INIT_LIST_HEAD(&hba->ep_destroy_list);
 916
 917         if (hba->regview) {
 918                 pci_iounmap(hba->pcidev, hba->regview);
 919                 hba->regview = NULL;
 920         }
 921         pci_dev_put(hba->pcidev);
 922         bnx2i_free_mp_bdt(hba);
 923         bnx2i_release_free_cid_que(hba);
 924         iscsi_host_free(shost);
 925 }
 926
 927 /**
 928  * bnx2i_conn_free_login_resources - free DMA resources used for login process
 929  * @hba:                pointer to adapter instance
 930  * @bnx2i_conn:         iscsi connection pointer
 931  *
 932  * Login related resources, mostly BDT & payload DMA memory is freed
 933  */
 934 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
 935                                             struct bnx2i_conn *bnx2i_conn)
 936 {
 937         if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
 938                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 939                                   bnx2i_conn->gen_pdu.resp_bd_tbl,
 940                                   bnx2i_conn->gen_pdu.resp_bd_dma);
 941                 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
 942         }
 943
 944         if (bnx2i_conn->gen_pdu.req_bd_tbl) {
 945                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 946                                   bnx2i_conn->gen_pdu.req_bd_tbl,
 947                                   bnx2i_conn->gen_pdu.req_bd_dma);
 948                 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
 949         }
 950
 951         if (bnx2i_conn->gen_pdu.resp_buf) {
 952                 dma_free_coherent(&hba->pcidev->dev,
 953                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
 954                                   bnx2i_conn->gen_pdu.resp_buf,
 955                                   bnx2i_conn->gen_pdu.resp_dma_addr);
 956                 bnx2i_conn->gen_pdu.resp_buf = NULL;
 957         }
 958
 959         if (bnx2i_conn->gen_pdu.req_buf) {
 960                 dma_free_coherent(&hba->pcidev->dev,
 961                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
 962                                   bnx2i_conn->gen_pdu.req_buf,
 963                                   bnx2i_conn->gen_pdu.req_dma_addr);
 964                 bnx2i_conn->gen_pdu.req_buf = NULL;
 965         }
 966 }
 967
 968 /**
 969  * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
 970  * @hba:                pointer to adapter instance
 971  * @bnx2i_conn:         iscsi connection pointer
 972  *
 973  * Mgmt task DNA resources are allocated in this routine.
 974  */
 975 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
 976                                             struct bnx2i_conn *bnx2i_conn)
 977 {
 978         /* Allocate memory for login request/response buffers */
 979         bnx2i_conn->gen_pdu.req_buf =
 980                 dma_alloc_coherent(&hba->pcidev->dev,
 981                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
 982                                    &bnx2i_conn->gen_pdu.req_dma_addr,
 983                                    GFP_KERNEL);
 984         if (bnx2i_conn->gen_pdu.req_buf == NULL)
 985                 goto login_req_buf_failure;
 986
 987         bnx2i_conn->gen_pdu.req_buf_size = 0;
 988         bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
 989
 990         bnx2i_conn->gen_pdu.resp_buf =
 991                 dma_alloc_coherent(&hba->pcidev->dev,
 992                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
 993                                    &bnx2i_conn->gen_pdu.resp_dma_addr,
 994                                    GFP_KERNEL);
 995         if (bnx2i_conn->gen_pdu.resp_buf == NULL)
 996                 goto login_resp_buf_failure;
 997
 998         bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
 999         bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
1000
1001         bnx2i_conn->gen_pdu.req_bd_tbl =
1002                 dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
1003                                    &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
1004         if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
1005                 goto login_req_bd_tbl_failure;
1006
1007         bnx2i_conn->gen_pdu.resp_bd_tbl =
1008                 dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
1009                                    &bnx2i_conn->gen_pdu.resp_bd_dma,
1010                                    GFP_KERNEL);
1011         if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
1012                 goto login_resp_bd_tbl_failure;
1013
1014         return 0;
1015
1016 login_resp_bd_tbl_failure:
1017         dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
1018                           bnx2i_conn->gen_pdu.req_bd_tbl,
1019                           bnx2i_conn->gen_pdu.req_bd_dma);
1020         bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
1021
1022 login_req_bd_tbl_failure:
1023         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1024                           bnx2i_conn->gen_pdu.resp_buf,
1025                           bnx2i_conn->gen_pdu.resp_dma_addr);
1026         bnx2i_conn->gen_pdu.resp_buf = NULL;
1027 login_resp_buf_failure:
1028         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1029                           bnx2i_conn->gen_pdu.req_buf,
1030                           bnx2i_conn->gen_pdu.req_dma_addr);
1031         bnx2i_conn->gen_pdu.req_buf = NULL;
1032 login_req_buf_failure:
1033         iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
1034                           "login resource alloc failed!!\n");
1035         return -ENOMEM;
1036
1037 }
1038
1039
1040 /**
1041  * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
1042  * @bnx2i_conn:         iscsi connection pointer
1043  *
1044  * Allocates buffers and BD tables before shipping requests to cnic
1045  *      for PDUs prepared by 'iscsid' daemon
1046  */
1047 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
1048 {
1049         struct iscsi_bd *bd_tbl;
1050
1051         bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
1052
1053         bd_tbl->buffer_addr_hi =
1054                 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
1055         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
1056         bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
1057                                 bnx2i_conn->gen_pdu.req_buf;
1058         bd_tbl->reserved0 = 0;
1059         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1060                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1061
1062         bd_tbl = (struct iscsi_bd  *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1063         bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1064         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1065         bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1066         bd_tbl->reserved0 = 0;
1067         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1068                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1069 }
1070
1071
1072 /**
1073  * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1074  * @task:       transport layer task pointer
1075  *
1076  * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1077  *      Nop-out and Logout requests flow through this path.
1078  */
1079 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1080 {
1081         struct bnx2i_cmd *cmd = task->dd_data;
1082         struct bnx2i_conn *bnx2i_conn = cmd->conn;
1083         int rc = 0;
1084         char *buf;
1085         int data_len;
1086
1087         bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1088         switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1089         case ISCSI_OP_LOGIN:
1090                 bnx2i_send_iscsi_login(bnx2i_conn, task);
1091                 break;
1092         case ISCSI_OP_NOOP_OUT:
1093                 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1094                 buf = bnx2i_conn->gen_pdu.req_buf;
1095                 if (data_len)
1096                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1097                                                      buf, data_len, 1);
1098                 else
1099                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1100                                                      NULL, 0, 1);
1101                 break;
1102         case ISCSI_OP_LOGOUT:
1103                 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1104                 break;
1105         case ISCSI_OP_SCSI_TMFUNC:
1106                 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1107                 break;
1108         case ISCSI_OP_TEXT:
1109                 rc = bnx2i_send_iscsi_text(bnx2i_conn, task);
1110                 break;
1111         default:
1112                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1113                                   "send_gen: unsupported op 0x%x\n",
1114                                   task->hdr->opcode);
1115         }
1116         return rc;
1117 }
1118
1119
1120 /**********************************************************************
1121  *              SCSI-ML Interface
1122  **********************************************************************/
1123
1124 /**
1125  * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1126  * @sc:         SCSI-ML command pointer
1127  * @cmd:        iscsi cmd pointer
1128  */
1129 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1130 {
1131         u32 dword;
1132         int lpcnt;
1133         u8 *srcp;
1134         u32 *dstp;
1135         u32 scsi_lun[2];
1136
1137         int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1138         cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1139         cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1140
1141         lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1142         srcp = (u8 *) sc->cmnd;
1143         dstp = (u32 *) cmd->req.cdb;
1144         while (lpcnt--) {
1145                 memcpy(&dword, (const void *) srcp, 4);
1146                 *dstp = cpu_to_be32(dword);
1147                 srcp += 4;
1148                 dstp++;
1149         }
1150         if (sc->cmd_len & 0x3) {
1151                 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1152                 *dstp = cpu_to_be32(dword);
1153         }
1154 }
1155
1156 static void bnx2i_cleanup_task(struct iscsi_task *task)
1157 {
1158         struct iscsi_conn *conn = task->conn;
1159         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1160         struct bnx2i_hba *hba = bnx2i_conn->hba;
1161
1162         /*
1163          * mgmt task or cmd was never sent to us to transmit.
1164          */
1165         if (!task->sc || task->state == ISCSI_TASK_PENDING)
1166                 return;
1167         /*
1168          * need to clean-up task context to claim dma buffers
1169          */
1170         if (task->state == ISCSI_TASK_ABRT_TMF) {
1171                 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1172
1173                 spin_unlock_bh(&conn->session->back_lock);
1174                 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1175                                 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1176                 spin_lock_bh(&conn->session->back_lock);
1177         }
1178         bnx2i_iscsi_unmap_sg_list(task->dd_data);
1179 }
1180
1181 /**
1182  * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1183  * @conn:       transport layer conn structure pointer
1184  * @task:       transport layer command structure pointer
1185  */
1186 static int
1187 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1188 {
1189         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1190         struct bnx2i_hba *hba = bnx2i_conn->hba;
1191         struct bnx2i_cmd *cmd = task->dd_data;
1192
1193         memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1194
1195         bnx2i_setup_cmd_wqe_template(cmd);
1196         bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1197
1198         /* Tx PDU/data length count */
1199         ADD_STATS_64(hba, tx_pdus, 1);
1200         ADD_STATS_64(hba, tx_bytes, task->data_count);
1201
1202         if (task->data_count) {
1203                 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1204                        task->data_count);
1205                 bnx2i_conn->gen_pdu.req_wr_ptr =
1206                         bnx2i_conn->gen_pdu.req_buf + task->data_count;
1207         }
1208         cmd->conn = conn->dd_data;
1209         cmd->scsi_cmd = NULL;
1210         return bnx2i_iscsi_send_generic_request(task);
1211 }
1212
1213 /**
1214  * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1215  * @task:       transport layer command structure pointer
1216  *
1217  * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1218  */
1219 static int bnx2i_task_xmit(struct iscsi_task *task)
1220 {
1221         struct iscsi_conn *conn = task->conn;
1222         struct iscsi_session *session = conn->session;
1223         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1224         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1225         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1226         struct scsi_cmnd *sc = task->sc;
1227         struct bnx2i_cmd *cmd = task->dd_data;
1228         struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
1229
1230         if (atomic_read(&bnx2i_conn->ep->num_active_cmds) + 1  >
1231             hba->max_sqes)
1232                 return -ENOMEM;
1233
1234         /*
1235          * If there is no scsi_cmnd this must be a mgmt task
1236          */
1237         if (!sc)
1238                 return bnx2i_mtask_xmit(conn, task);
1239
1240         bnx2i_setup_cmd_wqe_template(cmd);
1241         cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1242         cmd->conn = bnx2i_conn;
1243         cmd->scsi_cmd = sc;
1244         cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1245         cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1246
1247         bnx2i_iscsi_map_sg_list(cmd);
1248         bnx2i_cpy_scsi_cdb(sc, cmd);
1249
1250         cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1251         if (sc->sc_data_direction == DMA_TO_DEVICE) {
1252                 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1253                 cmd->req.itt = task->itt |
1254                         (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1255                 bnx2i_setup_write_cmd_bd_info(task);
1256         } else {
1257                 if (scsi_bufflen(sc))
1258                         cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1259                 cmd->req.itt = task->itt |
1260                         (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1261         }
1262
1263         cmd->req.num_bds = cmd->io_tbl.bd_valid;
1264         if (!cmd->io_tbl.bd_valid) {
1265                 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1266                 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1267                 cmd->req.num_bds = 1;
1268         }
1269
1270         bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1271         return 0;
1272 }
1273
1274 /**
1275  * bnx2i_session_create - create a new iscsi session
1276  * @ep:         pointer to iscsi endpoint
1277  * @cmds_max:           user specified maximum commands
1278  * @qdepth:             scsi queue depth to support
1279  * @initial_cmdsn:      initial iscsi CMDSN to be used for this session
1280  *
1281  * Creates a new iSCSI session instance on given device.
1282  */
1283 static struct iscsi_cls_session *
1284 bnx2i_session_create(struct iscsi_endpoint *ep,
1285                      uint16_t cmds_max, uint16_t qdepth,
1286                      uint32_t initial_cmdsn)
1287 {
1288         struct Scsi_Host *shost;
1289         struct iscsi_cls_session *cls_session;
1290         struct bnx2i_hba *hba;
1291         struct bnx2i_endpoint *bnx2i_ep;
1292
1293         if (!ep) {
1294                 printk(KERN_ERR "bnx2i: missing ep.\n");
1295                 return NULL;
1296         }
1297
1298         bnx2i_ep = ep->dd_data;
1299         shost = bnx2i_ep->hba->shost;
1300         hba = iscsi_host_priv(shost);
1301         if (bnx2i_adapter_ready(hba))
1302                 return NULL;
1303
1304         /*
1305          * user can override hw limit as long as it is within
1306          * the min/max.
1307          */
1308         if (cmds_max > hba->max_sqes)
1309                 cmds_max = hba->max_sqes;
1310         else if (cmds_max < BNX2I_SQ_WQES_MIN)
1311                 cmds_max = BNX2I_SQ_WQES_MIN;
1312
1313         cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1314                                           cmds_max, 0, sizeof(struct bnx2i_cmd),
1315                                           initial_cmdsn, ISCSI_MAX_TARGET);
1316         if (!cls_session)
1317                 return NULL;
1318
1319         if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1320                 goto session_teardown;
1321         return cls_session;
1322
1323 session_teardown:
1324         iscsi_session_teardown(cls_session);
1325         return NULL;
1326 }
1327
1328
1329 /**
1330  * bnx2i_session_destroy - destroys iscsi session
1331  * @cls_session:        pointer to iscsi cls session
1332  *
1333  * Destroys previously created iSCSI session instance and releases
1334  *      all resources held by it
1335  */
1336 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1337 {
1338         struct iscsi_session *session = cls_session->dd_data;
1339         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1340         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1341
1342         bnx2i_destroy_cmd_pool(hba, session);
1343         iscsi_session_teardown(cls_session);
1344 }
1345
1346
1347 /**
1348  * bnx2i_conn_create - create iscsi connection instance
1349  * @cls_session:        pointer to iscsi cls session
1350  * @cid:                iscsi cid as per rfc (not NX2's CID terminology)
1351  *
1352  * Creates a new iSCSI connection instance for a given session
1353  */
1354 static struct iscsi_cls_conn *
1355 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1356 {
1357         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1358         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1359         struct bnx2i_conn *bnx2i_conn;
1360         struct iscsi_cls_conn *cls_conn;
1361         struct iscsi_conn *conn;
1362
1363         cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1364                                     cid);
1365         if (!cls_conn)
1366                 return NULL;
1367         conn = cls_conn->dd_data;
1368
1369         bnx2i_conn = conn->dd_data;
1370         bnx2i_conn->cls_conn = cls_conn;
1371         bnx2i_conn->hba = hba;
1372
1373         atomic_set(&bnx2i_conn->work_cnt, 0);
1374
1375         /* 'ep' ptr will be assigned in bind() call */
1376         bnx2i_conn->ep = NULL;
1377         init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1378
1379         if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1380                 iscsi_conn_printk(KERN_ALERT, conn,
1381                                   "conn_new: login resc alloc failed!!\n");
1382                 goto free_conn;
1383         }
1384
1385         return cls_conn;
1386
1387 free_conn:
1388         iscsi_conn_teardown(cls_conn);
1389         return NULL;
1390 }
1391
1392 /**
1393  * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1394  * @cls_session:        pointer to iscsi cls session
1395  * @cls_conn:           pointer to iscsi cls conn
1396  * @transport_fd:       64-bit EP handle
1397  * @is_leading:         leading connection on this session?
1398  *
1399  * Binds together iSCSI session instance, iSCSI connection instance
1400  *      and the TCP connection. This routine returns error code if
1401  *      TCP connection does not belong on the device iSCSI sess/conn
1402  *      is bound
1403  */
1404 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1405                            struct iscsi_cls_conn *cls_conn,
1406                            uint64_t transport_fd, int is_leading)
1407 {
1408         struct iscsi_conn *conn = cls_conn->dd_data;
1409         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1410         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1411         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1412         struct bnx2i_endpoint *bnx2i_ep;
1413         struct iscsi_endpoint *ep;
1414         int ret_code;
1415
1416         ep = iscsi_lookup_endpoint(transport_fd);
1417         if (!ep)
1418                 return -EINVAL;
1419         /*
1420          * Forcefully terminate all in progress connection recovery at the
1421          * earliest, either in bind(), send_pdu(LOGIN), or conn_start()
1422          */
1423         if (bnx2i_adapter_ready(hba)) {
1424                 ret_code = -EIO;
1425                 goto put_ep;
1426         }
1427
1428         bnx2i_ep = ep->dd_data;
1429         if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1430             (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD)) {
1431                 /* Peer disconnect via' FIN or RST */
1432                 ret_code = -EINVAL;
1433                 goto put_ep;
1434         }
1435
1436         if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) {
1437                 ret_code = -EINVAL;
1438                 goto put_ep;
1439         }
1440
1441         if (bnx2i_ep->hba != hba) {
1442                 /* Error - TCP connection does not belong to this device
1443                  */
1444                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1445                                   "conn bind, ep=0x%p (%s) does not",
1446                                   bnx2i_ep, bnx2i_ep->hba->netdev->name);
1447                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1448                                   "belong to hba (%s)\n",
1449                                   hba->netdev->name);
1450                 ret_code = -EEXIST;
1451                 goto put_ep;
1452         }
1453         bnx2i_ep->conn = bnx2i_conn;
1454         bnx2i_conn->ep = bnx2i_ep;
1455         bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1456         bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1457
1458         ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1459                                                 bnx2i_ep->ep_iscsi_cid);
1460
1461         /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1462          * driver needs to explicitly replenish RQ index during setup.
1463          */
1464         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1465                 bnx2i_put_rq_buf(bnx2i_conn, 0);
1466
1467         bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1468 put_ep:
1469         iscsi_put_endpoint(ep);
1470         return ret_code;
1471 }
1472
1473
1474 /**
1475  * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1476  * @cls_conn:   pointer to iscsi cls conn
1477  *
1478  * Destroy an iSCSI connection instance and release memory resources held by
1479  *      this connection
1480  */
1481 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1482 {
1483         struct iscsi_conn *conn = cls_conn->dd_data;
1484         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1485         struct Scsi_Host *shost;
1486         struct bnx2i_hba *hba;
1487         struct bnx2i_work *work, *tmp;
1488         unsigned cpu = 0;
1489         struct bnx2i_percpu_s *p;
1490
1491         shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1492         hba = iscsi_host_priv(shost);
1493
1494         bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1495
1496         if (atomic_read(&bnx2i_conn->work_cnt)) {
1497                 for_each_online_cpu(cpu) {
1498                         p = &per_cpu(bnx2i_percpu, cpu);
1499                         spin_lock_bh(&p->p_work_lock);
1500                         list_for_each_entry_safe(work, tmp,
1501                                                  &p->work_list, list) {
1502                                 if (work->session == conn->session &&
1503                                     work->bnx2i_conn == bnx2i_conn) {
1504                                         list_del_init(&work->list);
1505                                         kfree(work);
1506                                         if (!atomic_dec_and_test(
1507                                                         &bnx2i_conn->work_cnt))
1508                                                 break;
1509                                 }
1510                         }
1511                         spin_unlock_bh(&p->p_work_lock);
1512                 }
1513         }
1514
1515         iscsi_conn_teardown(cls_conn);
1516 }
1517
1518
1519 /**
1520  * bnx2i_ep_get_param - return iscsi ep parameter to caller
1521  * @ep:         pointer to iscsi endpoint
1522  * @param:      parameter type identifier
1523  * @buf:        buffer pointer
1524  *
1525  * returns iSCSI ep parameters
1526  */
1527 static int bnx2i_ep_get_param(struct iscsi_endpoint *ep,
1528                               enum iscsi_param param, char *buf)
1529 {
1530         struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
1531         struct bnx2i_hba *hba = bnx2i_ep->hba;
1532         int len = -ENOTCONN;
1533
1534         if (!hba)
1535                 return -ENOTCONN;
1536
1537         switch (param) {
1538         case ISCSI_PARAM_CONN_PORT:
1539                 mutex_lock(&hba->net_dev_lock);
1540                 if (bnx2i_ep->cm_sk)
1541                         len = sprintf(buf, "%hu\n", bnx2i_ep->cm_sk->dst_port);
1542                 mutex_unlock(&hba->net_dev_lock);
1543                 break;
1544         case ISCSI_PARAM_CONN_ADDRESS:
1545                 mutex_lock(&hba->net_dev_lock);
1546                 if (bnx2i_ep->cm_sk)
1547                         len = sprintf(buf, "%pI4\n", &bnx2i_ep->cm_sk->dst_ip);
1548                 mutex_unlock(&hba->net_dev_lock);
1549                 break;
1550         default:
1551                 return -ENOSYS;
1552         }
1553
1554         return len;
1555 }
1556
1557 /**
1558  * bnx2i_host_get_param - returns host (adapter) related parameters
1559  * @shost:      scsi host pointer
1560  * @param:      parameter type identifier
1561  * @buf:        buffer pointer
1562  */
1563 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1564                                 enum iscsi_host_param param, char *buf)
1565 {
1566         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1567         int len = 0;
1568
1569         switch (param) {
1570         case ISCSI_HOST_PARAM_HWADDRESS:
1571                 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1572                 break;
1573         case ISCSI_HOST_PARAM_NETDEV_NAME:
1574                 len = sprintf(buf, "%s\n", hba->netdev->name);
1575                 break;
1576         case ISCSI_HOST_PARAM_IPADDRESS: {
1577                 struct list_head *active_list = &hba->ep_active_list;
1578
1579                 read_lock_bh(&hba->ep_rdwr_lock);
1580                 if (!list_empty(&hba->ep_active_list)) {
1581                         struct bnx2i_endpoint *bnx2i_ep;
1582                         struct cnic_sock *csk;
1583
1584                         bnx2i_ep = list_first_entry(active_list,
1585                                                     struct bnx2i_endpoint,
1586                                                     link);
1587                         csk = bnx2i_ep->cm_sk;
1588                         if (test_bit(SK_F_IPV6, &csk->flags))
1589                                 len = sprintf(buf, "%pI6\n", csk->src_ip);
1590                         else
1591                                 len = sprintf(buf, "%pI4\n", csk->src_ip);
1592                 }
1593                 read_unlock_bh(&hba->ep_rdwr_lock);
1594                 break;
1595         }
1596         default:
1597                 return iscsi_host_get_param(shost, param, buf);
1598         }
1599         return len;
1600 }
1601
1602 /**
1603  * bnx2i_conn_start - completes iscsi connection migration to FFP
1604  * @cls_conn:   pointer to iscsi cls conn
1605  *
1606  * last call in FFP migration to handover iscsi conn to the driver
1607  */
1608 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1609 {
1610         struct iscsi_conn *conn = cls_conn->dd_data;
1611         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1612
1613         bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1614         bnx2i_update_iscsi_conn(conn);
1615
1616         /*
1617          * this should normally not sleep for a long time so it should
1618          * not disrupt the caller.
1619          */
1620         timer_setup(&bnx2i_conn->ep->ofld_timer, bnx2i_ep_ofld_timer, 0);
1621         bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1622         add_timer(&bnx2i_conn->ep->ofld_timer);
1623         /* update iSCSI context for this conn, wait for CNIC to complete */
1624         wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1625                         bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1626
1627         if (signal_pending(current))
1628                 flush_signals(current);
1629         del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1630
1631         iscsi_conn_start(cls_conn);
1632         return 0;
1633 }
1634
1635
1636 /**
1637  * bnx2i_conn_get_stats - returns iSCSI stats
1638  * @cls_conn:   pointer to iscsi cls conn
1639  * @stats:      pointer to iscsi statistic struct
1640  */
1641 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1642                                  struct iscsi_stats *stats)
1643 {
1644         struct iscsi_conn *conn = cls_conn->dd_data;
1645
1646         stats->txdata_octets = conn->txdata_octets;
1647         stats->rxdata_octets = conn->rxdata_octets;
1648         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1649         stats->dataout_pdus = conn->dataout_pdus_cnt;
1650         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1651         stats->datain_pdus = conn->datain_pdus_cnt;
1652         stats->r2t_pdus = conn->r2t_pdus_cnt;
1653         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1654         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1655         stats->digest_err = 0;
1656         stats->timeout_err = 0;
1657         strcpy(stats->custom[0].desc, "eh_abort_cnt");
1658         stats->custom[0].value = conn->eh_abort_cnt;
1659         stats->custom_length = 1;
1660 }
1661
1662
1663 /**
1664  * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1665  * @dst_addr:   target IP address
1666  *
1667  * check if route resolves to BNX2 device
1668  */
1669 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1670 {
1671         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1672         struct bnx2i_hba *hba;
1673         struct cnic_dev *cnic = NULL;
1674
1675         hba = get_adapter_list_head();
1676         if (hba && hba->cnic)
1677                 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1678         if (!cnic) {
1679                 printk(KERN_ALERT "bnx2i: no route,"
1680                        "can't connect using cnic\n");
1681                 goto no_nx2_route;
1682         }
1683         hba = bnx2i_find_hba_for_cnic(cnic);
1684         if (!hba)
1685                 goto no_nx2_route;
1686
1687         if (bnx2i_adapter_ready(hba)) {
1688                 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1689                 goto no_nx2_route;
1690         }
1691         if (hba->netdev->mtu > hba->mtu_supported) {
1692                 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1693                                   hba->netdev->name, hba->netdev->mtu);
1694                 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1695                                   hba->mtu_supported);
1696                 goto no_nx2_route;
1697         }
1698         return hba;
1699 no_nx2_route:
1700         return NULL;
1701 }
1702
1703
1704 /**
1705  * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1706  * @hba:        pointer to adapter instance
1707  * @ep:         endpoint (transport identifier) structure
1708  *
1709  * destroys cm_sock structure and on chip iscsi context
1710  */
1711 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1712                                  struct bnx2i_endpoint *ep)
1713 {
1714         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)
1715                 hba->cnic->cm_destroy(ep->cm_sk);
1716
1717         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1718             ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1719                 if (ep->conn && ep->conn->cls_conn &&
1720                     ep->conn->cls_conn->dd_data) {
1721                         struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;
1722
1723                         /* Must suspend all rx queue activity for this ep */
1724                         set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
1725                 }
1726                 /* CONN_DISCONNECT timeout may or may not be an issue depending
1727                  * on what transcribed in TCP layer, different targets behave
1728                  * differently
1729                  */
1730                 printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "
1731                                   "please submit GRC Dump, NW/PCIe trace, "
1732                                   "driver msgs to developers for analysis\n",
1733                                   hba->netdev->name);
1734         }
1735
1736         ep->state = EP_STATE_CLEANUP_START;
1737         timer_setup(&ep->ofld_timer, bnx2i_ep_ofld_timer, 0);
1738         ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
1739         add_timer(&ep->ofld_timer);
1740
1741         bnx2i_ep_destroy_list_add(hba, ep);
1742
1743         /* destroy iSCSI context, wait for it to complete */
1744         if (bnx2i_send_conn_destroy(hba, ep))
1745                 ep->state = EP_STATE_CLEANUP_CMPL;
1746
1747         wait_event_interruptible(ep->ofld_wait,
1748                                  (ep->state != EP_STATE_CLEANUP_START));
1749
1750         if (signal_pending(current))
1751                 flush_signals(current);
1752         del_timer_sync(&ep->ofld_timer);
1753
1754         bnx2i_ep_destroy_list_del(hba, ep);
1755
1756         if (ep->state != EP_STATE_CLEANUP_CMPL)
1757                 /* should never happen */
1758                 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1759
1760         return 0;
1761 }
1762
1763
1764 /**
1765  * bnx2i_ep_connect - establish TCP connection to target portal
1766  * @shost:              scsi host
1767  * @dst_addr:           target IP address
1768  * @non_blocking:       blocking or non-blocking call
1769  *
1770  * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1771  *      with l5_core and the CNIC. This is a multi-step process of resolving
1772  *      route to target, create a iscsi connection context, handshaking with
1773  *      CNIC module to create/initialize the socket struct and finally
1774  *      sending down option-2 request to complete TCP 3-way handshake
1775  */
1776 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1777                                                struct sockaddr *dst_addr,
1778                                                int non_blocking)
1779 {
1780         u32 iscsi_cid = BNX2I_CID_RESERVED;
1781         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1782         struct sockaddr_in6 *desti6;
1783         struct bnx2i_endpoint *bnx2i_ep;
1784         struct bnx2i_hba *hba;
1785         struct cnic_dev *cnic;
1786         struct cnic_sockaddr saddr;
1787         struct iscsi_endpoint *ep;
1788         int rc = 0;
1789
1790         if (shost) {
1791                 /* driver is given scsi host to work with */
1792                 hba = iscsi_host_priv(shost);
1793         } else
1794                 /*
1795                  * check if the given destination can be reached through
1796                  * a iscsi capable NetXtreme2 device
1797                  */
1798                 hba = bnx2i_check_route(dst_addr);
1799
1800         if (!hba) {
1801                 rc = -EINVAL;
1802                 goto nohba;
1803         }
1804         mutex_lock(&hba->net_dev_lock);
1805
1806         if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) {
1807                 rc = -EPERM;
1808                 goto check_busy;
1809         }
1810         cnic = hba->cnic;
1811         ep = bnx2i_alloc_ep(hba);
1812         if (!ep) {
1813                 rc = -ENOMEM;
1814                 goto check_busy;
1815         }
1816         bnx2i_ep = ep->dd_data;
1817
1818         atomic_set(&bnx2i_ep->num_active_cmds, 0);
1819         iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1820         if (iscsi_cid == -1) {
1821                 printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate "
1822                         "iscsi cid\n", hba->netdev->name);
1823                 rc = -ENOMEM;
1824                 bnx2i_free_ep(ep);
1825                 goto check_busy;
1826         }
1827         bnx2i_ep->hba_age = hba->age;
1828
1829         rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1830         if (rc != 0) {
1831                 printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error"
1832                         "\n", hba->netdev->name);
1833                 rc = -ENOMEM;
1834                 goto qp_resc_err;
1835         }
1836
1837         bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1838         bnx2i_ep->state = EP_STATE_OFLD_START;
1839         bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1840
1841         timer_setup(&bnx2i_ep->ofld_timer, bnx2i_ep_ofld_timer, 0);
1842         bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1843         add_timer(&bnx2i_ep->ofld_timer);
1844
1845         if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) {
1846                 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1847                         printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1848                                 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1849                         rc = -EBUSY;
1850                 } else
1851                         rc = -ENOSPC;
1852                 printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe"
1853                         "\n", hba->netdev->name);
1854                 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1855                 goto conn_failed;
1856         }
1857
1858         /* Wait for CNIC hardware to setup conn context and return 'cid' */
1859         wait_event_interruptible(bnx2i_ep->ofld_wait,
1860                                  bnx2i_ep->state != EP_STATE_OFLD_START);
1861
1862         if (signal_pending(current))
1863                 flush_signals(current);
1864         del_timer_sync(&bnx2i_ep->ofld_timer);
1865
1866         bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1867
1868         if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1869                 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1870                         printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1871                                 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1872                         rc = -EBUSY;
1873                 } else
1874                         rc = -ENOSPC;
1875                 goto conn_failed;
1876         }
1877
1878         rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1879                              iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1880         if (rc) {
1881                 rc = -EINVAL;
1882                 /* Need to terminate and cleanup the connection */
1883                 goto release_ep;
1884         }
1885
1886         bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1887         bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1888         clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1889
1890         memset(&saddr, 0, sizeof(saddr));
1891         if (dst_addr->sa_family == AF_INET) {
1892                 desti = (struct sockaddr_in *) dst_addr;
1893                 saddr.remote.v4 = *desti;
1894                 saddr.local.v4.sin_family = desti->sin_family;
1895         } else if (dst_addr->sa_family == AF_INET6) {
1896                 desti6 = (struct sockaddr_in6 *) dst_addr;
1897                 saddr.remote.v6 = *desti6;
1898                 saddr.local.v6.sin6_family = desti6->sin6_family;
1899         }
1900
1901         bnx2i_ep->timestamp = jiffies;
1902         bnx2i_ep->state = EP_STATE_CONNECT_START;
1903         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1904                 rc = -EINVAL;
1905                 goto conn_failed;
1906         } else
1907                 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1908         if (rc)
1909                 goto release_ep;
1910
1911         bnx2i_ep_active_list_add(hba, bnx2i_ep);
1912
1913         rc = bnx2i_map_ep_dbell_regs(bnx2i_ep);
1914         if (rc)
1915                 goto del_active_ep;
1916
1917         mutex_unlock(&hba->net_dev_lock);
1918         return ep;
1919
1920 del_active_ep:
1921         bnx2i_ep_active_list_del(hba, bnx2i_ep);
1922 release_ep:
1923         if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1924                 mutex_unlock(&hba->net_dev_lock);
1925                 return ERR_PTR(rc);
1926         }
1927 conn_failed:
1928         bnx2i_free_qp_resc(hba, bnx2i_ep);
1929 qp_resc_err:
1930         bnx2i_free_ep(ep);
1931 check_busy:
1932         mutex_unlock(&hba->net_dev_lock);
1933 nohba:
1934         return ERR_PTR(rc);
1935 }
1936
1937
1938 /**
1939  * bnx2i_ep_poll - polls for TCP connection establishement
1940  * @ep:                 TCP connection (endpoint) handle
1941  * @timeout_ms:         timeout value in milli secs
1942  *
1943  * polls for TCP connect request to complete
1944  */
1945 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1946 {
1947         struct bnx2i_endpoint *bnx2i_ep;
1948         int rc = 0;
1949
1950         bnx2i_ep = ep->dd_data;
1951         if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1952             (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1953             (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1954                 return -1;
1955         if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1956                 return 1;
1957
1958         rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1959                                               ((bnx2i_ep->state ==
1960                                                 EP_STATE_OFLD_FAILED) ||
1961                                                (bnx2i_ep->state ==
1962                                                 EP_STATE_CONNECT_FAILED) ||
1963                                                (bnx2i_ep->state ==
1964                                                 EP_STATE_CONNECT_COMPL)),
1965                                               msecs_to_jiffies(timeout_ms));
1966         if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
1967                 rc = -1;
1968
1969         if (rc > 0)
1970                 return 1;
1971         else if (!rc)
1972                 return 0;       /* timeout */
1973         else
1974                 return rc;
1975 }
1976
1977
1978 /**
1979  * bnx2i_ep_tcp_conn_active - check EP state transition
1980  * @bnx2i_ep:           endpoint pointer
1981  *
1982  * check if underlying TCP connection is active
1983  */
1984 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1985 {
1986         int ret;
1987         int cnic_dev_10g = 0;
1988
1989         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1990                 cnic_dev_10g = 1;
1991
1992         switch (bnx2i_ep->state) {
1993         case EP_STATE_CLEANUP_FAILED:
1994         case EP_STATE_OFLD_FAILED:
1995         case EP_STATE_DISCONN_TIMEDOUT:
1996                 ret = 0;
1997                 break;
1998         case EP_STATE_CONNECT_START:
1999         case EP_STATE_CONNECT_FAILED:
2000         case EP_STATE_CONNECT_COMPL:
2001         case EP_STATE_ULP_UPDATE_START:
2002         case EP_STATE_ULP_UPDATE_COMPL:
2003         case EP_STATE_TCP_FIN_RCVD:
2004         case EP_STATE_LOGOUT_SENT:
2005         case EP_STATE_LOGOUT_RESP_RCVD:
2006         case EP_STATE_ULP_UPDATE_FAILED:
2007                 ret = 1;
2008                 break;
2009         case EP_STATE_TCP_RST_RCVD:
2010                 if (cnic_dev_10g)
2011                         ret = 0;
2012                 else
2013                         ret = 1;
2014                 break;
2015         default:
2016                 ret = 0;
2017         }
2018
2019         return ret;
2020 }
2021
2022
2023 /**
2024  * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
2025  * @bnx2i_ep:           TCP connection (bnx2i endpoint) handle
2026  *
2027  * executes  TCP connection teardown process
2028  */
2029 int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
2030 {
2031         struct bnx2i_hba *hba = bnx2i_ep->hba;
2032         struct cnic_dev *cnic;
2033         struct iscsi_session *session = NULL;
2034         struct iscsi_conn *conn = NULL;
2035         int ret = 0;
2036         int close = 0;
2037         int close_ret = 0;
2038
2039         if (!hba)
2040                 return 0;
2041
2042         cnic = hba->cnic;
2043         if (!cnic)
2044                 return 0;
2045
2046         if (bnx2i_ep->state == EP_STATE_IDLE ||
2047             bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2048                 return 0;
2049
2050         if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
2051                 goto destroy_conn;
2052
2053         if (bnx2i_ep->conn) {
2054                 conn = bnx2i_ep->conn->cls_conn->dd_data;
2055                 session = conn->session;
2056         }
2057
2058         timer_setup(&bnx2i_ep->ofld_timer, bnx2i_ep_ofld_timer, 0);
2059         bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
2060         add_timer(&bnx2i_ep->ofld_timer);
2061
2062         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
2063                 goto out;
2064
2065         if (session) {
2066                 spin_lock_bh(&session->frwd_lock);
2067                 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
2068                         if (session->state == ISCSI_STATE_LOGGING_OUT) {
2069                                 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
2070                                         /* Logout sent, but no resp */
2071                                         printk(KERN_ALERT "bnx2i (%s): WARNING"
2072                                                 " logout response was not "
2073                                                 "received!\n",
2074                                                 bnx2i_ep->hba->netdev->name);
2075                                 } else if (bnx2i_ep->state ==
2076                                            EP_STATE_LOGOUT_RESP_RCVD)
2077                                         close = 1;
2078                         }
2079                 } else
2080                         close = 1;
2081
2082                 spin_unlock_bh(&session->frwd_lock);
2083         }
2084
2085         bnx2i_ep->state = EP_STATE_DISCONN_START;
2086
2087         if (close)
2088                 close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
2089         else
2090                 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);
2091
2092         if (close_ret)
2093                 printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n",
2094                         bnx2i_ep->hba->netdev->name, close, close_ret);
2095         else
2096                 /* wait for option-2 conn teardown */
2097                 wait_event_interruptible(bnx2i_ep->ofld_wait,
2098                                 ((bnx2i_ep->state != EP_STATE_DISCONN_START)
2099                                 && (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD)));
2100
2101         if (signal_pending(current))
2102                 flush_signals(current);
2103         del_timer_sync(&bnx2i_ep->ofld_timer);
2104
2105 destroy_conn:
2106         bnx2i_ep_active_list_del(hba, bnx2i_ep);
2107         if (bnx2i_tear_down_conn(hba, bnx2i_ep))
2108                 return -EINVAL;
2109 out:
2110         bnx2i_ep->state = EP_STATE_IDLE;
2111         return ret;
2112 }
2113
2114
2115 /**
2116  * bnx2i_ep_disconnect - executes TCP connection teardown process
2117  * @ep:         TCP connection (iscsi endpoint) handle
2118  *
2119  * executes  TCP connection teardown process
2120  */
2121 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
2122 {
2123         struct bnx2i_endpoint *bnx2i_ep;
2124         struct bnx2i_conn *bnx2i_conn = NULL;
2125         struct bnx2i_hba *hba;
2126
2127         bnx2i_ep = ep->dd_data;
2128
2129         /* driver should not attempt connection cleanup until TCP_CONNECT
2130          * completes either successfully or fails. Timeout is 9-secs, so
2131          * wait for it to complete
2132          */
2133         while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
2134                 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
2135                 msleep(250);
2136
2137         if (bnx2i_ep->conn)
2138                 bnx2i_conn = bnx2i_ep->conn;
2139         hba = bnx2i_ep->hba;
2140
2141         mutex_lock(&hba->net_dev_lock);
2142
2143         if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2144                 goto out;
2145
2146         if (bnx2i_ep->state == EP_STATE_IDLE)
2147                 goto free_resc;
2148
2149         if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
2150             (bnx2i_ep->hba_age != hba->age)) {
2151                 bnx2i_ep_active_list_del(hba, bnx2i_ep);
2152                 goto free_resc;
2153         }
2154
2155         /* Do all chip cleanup here */
2156         if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {
2157                 mutex_unlock(&hba->net_dev_lock);
2158                 return;
2159         }
2160 free_resc:
2161         bnx2i_free_qp_resc(hba, bnx2i_ep);
2162
2163         if (bnx2i_conn)
2164                 bnx2i_conn->ep = NULL;
2165
2166         bnx2i_free_ep(ep);
2167 out:
2168         mutex_unlock(&hba->net_dev_lock);
2169
2170         wake_up_interruptible(&hba->eh_wait);
2171 }
2172
2173
2174 /**
2175  * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2176  * @shost:      scsi host pointer
2177  * @params:     pointer to buffer containing iscsi path message
2178  */
2179 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
2180 {
2181         struct bnx2i_hba *hba = iscsi_host_priv(shost);
2182         char *buf = (char *) params;
2183         u16 len = sizeof(*params);
2184
2185         /* handled by cnic driver */
2186         hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
2187                                      len);
2188
2189         return 0;
2190 }
2191
2192 static umode_t bnx2i_attr_is_visible(int param_type, int param)
2193 {
2194         switch (param_type) {
2195         case ISCSI_HOST_PARAM:
2196                 switch (param) {
2197                 case ISCSI_HOST_PARAM_NETDEV_NAME:
2198                 case ISCSI_HOST_PARAM_HWADDRESS:
2199                 case ISCSI_HOST_PARAM_IPADDRESS:
2200                         return S_IRUGO;
2201                 default:
2202                         return 0;
2203                 }
2204         case ISCSI_PARAM:
2205                 switch (param) {
2206                 case ISCSI_PARAM_MAX_RECV_DLENGTH:
2207                 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
2208                 case ISCSI_PARAM_HDRDGST_EN:
2209                 case ISCSI_PARAM_DATADGST_EN:
2210                 case ISCSI_PARAM_CONN_ADDRESS:
2211                 case ISCSI_PARAM_CONN_PORT:
2212                 case ISCSI_PARAM_EXP_STATSN:
2213                 case ISCSI_PARAM_PERSISTENT_ADDRESS:
2214                 case ISCSI_PARAM_PERSISTENT_PORT:
2215                 case ISCSI_PARAM_PING_TMO:
2216                 case ISCSI_PARAM_RECV_TMO:
2217                 case ISCSI_PARAM_INITIAL_R2T_EN:
2218                 case ISCSI_PARAM_MAX_R2T:
2219                 case ISCSI_PARAM_IMM_DATA_EN:
2220                 case ISCSI_PARAM_FIRST_BURST:
2221                 case ISCSI_PARAM_MAX_BURST:
2222                 case ISCSI_PARAM_PDU_INORDER_EN:
2223                 case ISCSI_PARAM_DATASEQ_INORDER_EN:
2224                 case ISCSI_PARAM_ERL:
2225                 case ISCSI_PARAM_TARGET_NAME:
2226                 case ISCSI_PARAM_TPGT:
2227                 case ISCSI_PARAM_USERNAME:
2228                 case ISCSI_PARAM_PASSWORD:
2229                 case ISCSI_PARAM_USERNAME_IN:
2230                 case ISCSI_PARAM_PASSWORD_IN:
2231                 case ISCSI_PARAM_FAST_ABORT:
2232                 case ISCSI_PARAM_ABORT_TMO:
2233                 case ISCSI_PARAM_LU_RESET_TMO:
2234                 case ISCSI_PARAM_TGT_RESET_TMO:
2235                 case ISCSI_PARAM_IFACE_NAME:
2236                 case ISCSI_PARAM_INITIATOR_NAME:
2237                 case ISCSI_PARAM_BOOT_ROOT:
2238                 case ISCSI_PARAM_BOOT_NIC:
2239                 case ISCSI_PARAM_BOOT_TARGET:
2240                         return S_IRUGO;
2241                 default:
2242                         return 0;
2243                 }
2244         }
2245
2246         return 0;
2247 }
2248
2249 /*
2250  * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2251  * used while registering with the scsi host and iSCSI transport module.
2252  */
2253 static struct scsi_host_template bnx2i_host_template = {
2254         .module                 = THIS_MODULE,
2255         .name                   = "QLogic Offload iSCSI Initiator",
2256         .proc_name              = "bnx2i",
2257         .queuecommand           = iscsi_queuecommand,
2258         .eh_timed_out           = iscsi_eh_cmd_timed_out,
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         .sg_tablesize           = ISCSI_MAX_BDS_PER_CMD,
2269         .shost_groups           = bnx2i_dev_groups,
2270         .track_queue_depth      = 1,
2271         .cmd_size               = sizeof(struct iscsi_cmd),
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         .unbind_conn            = iscsi_conn_unbind,
2286         .destroy_conn           = bnx2i_conn_destroy,
2287         .attr_is_visible        = bnx2i_attr_is_visible,
2288         .set_param              = iscsi_set_param,
2289         .get_conn_param         = iscsi_conn_get_param,
2290         .get_session_param      = iscsi_session_get_param,
2291         .get_host_param         = bnx2i_host_get_param,
2292         .start_conn             = bnx2i_conn_start,
2293         .stop_conn              = iscsi_conn_stop,
2294         .send_pdu               = iscsi_conn_send_pdu,
2295         .xmit_task              = bnx2i_task_xmit,
2296         .get_stats              = bnx2i_conn_get_stats,
2297         /* TCP connect - disconnect - option-2 interface calls */
2298         .get_ep_param           = bnx2i_ep_get_param,
2299         .ep_connect             = bnx2i_ep_connect,
2300         .ep_poll                = bnx2i_ep_poll,
2301         .ep_disconnect          = bnx2i_ep_disconnect,
2302         .set_path               = bnx2i_nl_set_path,
2303         /* Error recovery timeout call */
2304         .session_recovery_timedout = iscsi_session_recovery_timedout,
2305         .cleanup_task           = bnx2i_cleanup_task,
2306 };