drivers/scsi/bnx2i/bnx2i_iscsi.c

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