Pileus Git - ~andy/linux/blob - 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, CNIC_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,
 537                                                CNIC_PAGE_SIZE,
 538                                                &hba->dummy_buf_dma, GFP_KERNEL);
 539         if (!hba->dummy_buffer) {
 540                 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
 541                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 542                                   hba->mp_bd_tbl, hba->mp_bd_dma);
 543                 hba->mp_bd_tbl = NULL;
 544                 rc = -1;
 545                 goto out;
 546         }
 547
 548         mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
 549         addr = (unsigned long) hba->dummy_buf_dma;
 550         mp_bdt->buffer_addr_lo = addr & 0xffffffff;
 551         mp_bdt->buffer_addr_hi = addr >> 32;
 552         mp_bdt->buffer_length = CNIC_PAGE_SIZE;
 553         mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
 554                         ISCSI_BD_FIRST_IN_BD_CHAIN;
 555 out:
 556         return rc;
 557 }
 558
 559
 560 /**
 561  * bnx2i_free_mp_bdt - releases ITT back to free pool
 562  * @hba:        pointer to adapter instance
 563  *
 564  * free MP dummy buffer and associated BD table
 565  */
 566 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
 567 {
 568         if (hba->mp_bd_tbl) {
 569                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 570                                   hba->mp_bd_tbl, hba->mp_bd_dma);
 571                 hba->mp_bd_tbl = NULL;
 572         }
 573         if (hba->dummy_buffer) {
 574                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 575                                   hba->dummy_buffer, hba->dummy_buf_dma);
 576                 hba->dummy_buffer = NULL;
 577         }
 578                 return;
 579 }
 580
 581 /**
 582  * bnx2i_drop_session - notifies iscsid of connection error.
 583  * @hba:        adapter instance pointer
 584  * @session:    iscsi 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;
 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;
 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;
 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         pci_dev_put(hba->pcidev);
 917
 918         if (hba->regview) {
 919                 pci_iounmap(hba->pcidev, hba->regview);
 920                 hba->regview = NULL;
 921         }
 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->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->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  * @cmds_max:           max commands supported
1277  * @qdepth:             scsi queue depth to support
1278  * @initial_cmdsn:      initial iscsi CMDSN to be used for this session
1279  *
1280  * Creates a new iSCSI session instance on given device.
1281  */
1282 static struct iscsi_cls_session *
1283 bnx2i_session_create(struct iscsi_endpoint *ep,
1284                      uint16_t cmds_max, uint16_t qdepth,
1285                      uint32_t initial_cmdsn)
1286 {
1287         struct Scsi_Host *shost;
1288         struct iscsi_cls_session *cls_session;
1289         struct bnx2i_hba *hba;
1290         struct bnx2i_endpoint *bnx2i_ep;
1291
1292         if (!ep) {
1293                 printk(KERN_ERR "bnx2i: missing ep.\n");
1294                 return NULL;
1295         }
1296
1297         bnx2i_ep = ep->dd_data;
1298         shost = bnx2i_ep->hba->shost;
1299         hba = iscsi_host_priv(shost);
1300         if (bnx2i_adapter_ready(hba))
1301                 return NULL;
1302
1303         /*
1304          * user can override hw limit as long as it is within
1305          * the min/max.
1306          */
1307         if (cmds_max > hba->max_sqes)
1308                 cmds_max = hba->max_sqes;
1309         else if (cmds_max < BNX2I_SQ_WQES_MIN)
1310                 cmds_max = BNX2I_SQ_WQES_MIN;
1311
1312         cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1313                                           cmds_max, 0, sizeof(struct bnx2i_cmd),
1314                                           initial_cmdsn, ISCSI_MAX_TARGET);
1315         if (!cls_session)
1316                 return NULL;
1317
1318         if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1319                 goto session_teardown;
1320         return cls_session;
1321
1322 session_teardown:
1323         iscsi_session_teardown(cls_session);
1324         return NULL;
1325 }
1326
1327
1328 /**
1329  * bnx2i_session_destroy - destroys iscsi session
1330  * @cls_session:        pointer to iscsi cls session
1331  *
1332  * Destroys previously created iSCSI session instance and releases
1333  *      all resources held by it
1334  */
1335 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1336 {
1337         struct iscsi_session *session = cls_session->dd_data;
1338         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1339         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1340
1341         bnx2i_destroy_cmd_pool(hba, session);
1342         iscsi_session_teardown(cls_session);
1343 }
1344
1345
1346 /**
1347  * bnx2i_conn_create - create iscsi connection instance
1348  * @cls_session:        pointer to iscsi cls session
1349  * @cid:                iscsi cid as per rfc (not NX2's CID terminology)
1350  *
1351  * Creates a new iSCSI connection instance for a given session
1352  */
1353 static struct iscsi_cls_conn *
1354 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1355 {
1356         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1357         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1358         struct bnx2i_conn *bnx2i_conn;
1359         struct iscsi_cls_conn *cls_conn;
1360         struct iscsi_conn *conn;
1361
1362         cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1363                                     cid);
1364         if (!cls_conn)
1365                 return NULL;
1366         conn = cls_conn->dd_data;
1367
1368         bnx2i_conn = conn->dd_data;
1369         bnx2i_conn->cls_conn = cls_conn;
1370         bnx2i_conn->hba = hba;
1371
1372         atomic_set(&bnx2i_conn->work_cnt, 0);
1373
1374         /* 'ep' ptr will be assigned in bind() call */
1375         bnx2i_conn->ep = NULL;
1376         init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1377
1378         if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1379                 iscsi_conn_printk(KERN_ALERT, conn,
1380                                   "conn_new: login resc alloc failed!!\n");
1381                 goto free_conn;
1382         }
1383
1384         return cls_conn;
1385
1386 free_conn:
1387         iscsi_conn_teardown(cls_conn);
1388         return NULL;
1389 }
1390
1391 /**
1392  * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1393  * @cls_session:        pointer to iscsi cls session
1394  * @cls_conn:           pointer to iscsi cls conn
1395  * @transport_fd:       64-bit EP handle
1396  * @is_leading:         leading connection on this session?
1397  *
1398  * Binds together iSCSI session instance, iSCSI connection instance
1399  *      and the TCP connection. This routine returns error code if
1400  *      TCP connection does not belong on the device iSCSI sess/conn
1401  *      is bound
1402  */
1403 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1404                            struct iscsi_cls_conn *cls_conn,
1405                            uint64_t transport_fd, int is_leading)
1406 {
1407         struct iscsi_conn *conn = cls_conn->dd_data;
1408         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1409         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1410         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1411         struct bnx2i_endpoint *bnx2i_ep;
1412         struct iscsi_endpoint *ep;
1413         int ret_code;
1414
1415         ep = iscsi_lookup_endpoint(transport_fd);
1416         if (!ep)
1417                 return -EINVAL;
1418         /*
1419          * Forcefully terminate all in progress connection recovery at the
1420          * earliest, either in bind(), send_pdu(LOGIN), or conn_start()
1421          */
1422         if (bnx2i_adapter_ready(hba))
1423                 return -EIO;
1424
1425         bnx2i_ep = ep->dd_data;
1426         if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1427             (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1428                 /* Peer disconnect via' FIN or RST */
1429                 return -EINVAL;
1430
1431         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1432                 return -EINVAL;
1433
1434         if (bnx2i_ep->hba != hba) {
1435                 /* Error - TCP connection does not belong to this device
1436                  */
1437                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1438                                   "conn bind, ep=0x%p (%s) does not",
1439                                   bnx2i_ep, bnx2i_ep->hba->netdev->name);
1440                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1441                                   "belong to hba (%s)\n",
1442                                   hba->netdev->name);
1443                 return -EEXIST;
1444         }
1445         bnx2i_ep->conn = bnx2i_conn;
1446         bnx2i_conn->ep = bnx2i_ep;
1447         bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1448         bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1449
1450         ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1451                                                 bnx2i_ep->ep_iscsi_cid);
1452
1453         /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1454          * driver needs to explicitly replenish RQ index during setup.
1455          */
1456         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1457                 bnx2i_put_rq_buf(bnx2i_conn, 0);
1458
1459         bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1460         return ret_code;
1461 }
1462
1463
1464 /**
1465  * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1466  * @cls_conn:   pointer to iscsi cls conn
1467  *
1468  * Destroy an iSCSI connection instance and release memory resources held by
1469  *      this connection
1470  */
1471 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1472 {
1473         struct iscsi_conn *conn = cls_conn->dd_data;
1474         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1475         struct Scsi_Host *shost;
1476         struct bnx2i_hba *hba;
1477         struct bnx2i_work *work, *tmp;
1478         unsigned cpu = 0;
1479         struct bnx2i_percpu_s *p;
1480
1481         shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1482         hba = iscsi_host_priv(shost);
1483
1484         bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1485
1486         if (atomic_read(&bnx2i_conn->work_cnt)) {
1487                 for_each_online_cpu(cpu) {
1488                         p = &per_cpu(bnx2i_percpu, cpu);
1489                         spin_lock_bh(&p->p_work_lock);
1490                         list_for_each_entry_safe(work, tmp,
1491                                                  &p->work_list, list) {
1492                                 if (work->session == conn->session &&
1493                                     work->bnx2i_conn == bnx2i_conn) {
1494                                         list_del_init(&work->list);
1495                                         kfree(work);
1496                                         if (!atomic_dec_and_test(
1497                                                         &bnx2i_conn->work_cnt))
1498                                                 break;
1499                                 }
1500                         }
1501                         spin_unlock_bh(&p->p_work_lock);
1502                 }
1503         }
1504
1505         iscsi_conn_teardown(cls_conn);
1506 }
1507
1508
1509 /**
1510  * bnx2i_ep_get_param - return iscsi ep parameter to caller
1511  * @ep:         pointer to iscsi endpoint
1512  * @param:      parameter type identifier
1513  * @buf:        buffer pointer
1514  *
1515  * returns iSCSI ep parameters
1516  */
1517 static int bnx2i_ep_get_param(struct iscsi_endpoint *ep,
1518                               enum iscsi_param param, char *buf)
1519 {
1520         struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
1521         struct bnx2i_hba *hba = bnx2i_ep->hba;
1522         int len = -ENOTCONN;
1523
1524         if (!hba)
1525                 return -ENOTCONN;
1526
1527         switch (param) {
1528         case ISCSI_PARAM_CONN_PORT:
1529                 mutex_lock(&hba->net_dev_lock);
1530                 if (bnx2i_ep->cm_sk)
1531                         len = sprintf(buf, "%hu\n", bnx2i_ep->cm_sk->dst_port);
1532                 mutex_unlock(&hba->net_dev_lock);
1533                 break;
1534         case ISCSI_PARAM_CONN_ADDRESS:
1535                 mutex_lock(&hba->net_dev_lock);
1536                 if (bnx2i_ep->cm_sk)
1537                         len = sprintf(buf, "%pI4\n", &bnx2i_ep->cm_sk->dst_ip);
1538                 mutex_unlock(&hba->net_dev_lock);
1539                 break;
1540         default:
1541                 return -ENOSYS;
1542         }
1543
1544         return len;
1545 }
1546
1547 /**
1548  * bnx2i_host_get_param - returns host (adapter) related parameters
1549  * @shost:      scsi host pointer
1550  * @param:      parameter type identifier
1551  * @buf:        buffer pointer
1552  */
1553 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1554                                 enum iscsi_host_param param, char *buf)
1555 {
1556         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1557         int len = 0;
1558
1559         switch (param) {
1560         case ISCSI_HOST_PARAM_HWADDRESS:
1561                 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1562                 break;
1563         case ISCSI_HOST_PARAM_NETDEV_NAME:
1564                 len = sprintf(buf, "%s\n", hba->netdev->name);
1565                 break;
1566         case ISCSI_HOST_PARAM_IPADDRESS: {
1567                 struct list_head *active_list = &hba->ep_active_list;
1568
1569                 read_lock_bh(&hba->ep_rdwr_lock);
1570                 if (!list_empty(&hba->ep_active_list)) {
1571                         struct bnx2i_endpoint *bnx2i_ep;
1572                         struct cnic_sock *csk;
1573
1574                         bnx2i_ep = list_first_entry(active_list,
1575                                                     struct bnx2i_endpoint,
1576                                                     link);
1577                         csk = bnx2i_ep->cm_sk;
1578                         if (test_bit(SK_F_IPV6, &csk->flags))
1579                                 len = sprintf(buf, "%pI6\n", csk->src_ip);
1580                         else
1581                                 len = sprintf(buf, "%pI4\n", csk->src_ip);
1582                 }
1583                 read_unlock_bh(&hba->ep_rdwr_lock);
1584                 break;
1585         }
1586         default:
1587                 return iscsi_host_get_param(shost, param, buf);
1588         }
1589         return len;
1590 }
1591
1592 /**
1593  * bnx2i_conn_start - completes iscsi connection migration to FFP
1594  * @cls_conn:   pointer to iscsi cls conn
1595  *
1596  * last call in FFP migration to handover iscsi conn to the driver
1597  */
1598 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1599 {
1600         struct iscsi_conn *conn = cls_conn->dd_data;
1601         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1602
1603         bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1604         bnx2i_update_iscsi_conn(conn);
1605
1606         /*
1607          * this should normally not sleep for a long time so it should
1608          * not disrupt the caller.
1609          */
1610         bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1611         bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1612         bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1613         add_timer(&bnx2i_conn->ep->ofld_timer);
1614         /* update iSCSI context for this conn, wait for CNIC to complete */
1615         wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1616                         bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1617
1618         if (signal_pending(current))
1619                 flush_signals(current);
1620         del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1621
1622         iscsi_conn_start(cls_conn);
1623         return 0;
1624 }
1625
1626
1627 /**
1628  * bnx2i_conn_get_stats - returns iSCSI stats
1629  * @cls_conn:   pointer to iscsi cls conn
1630  * @stats:      pointer to iscsi statistic struct
1631  */
1632 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1633                                  struct iscsi_stats *stats)
1634 {
1635         struct iscsi_conn *conn = cls_conn->dd_data;
1636
1637         stats->txdata_octets = conn->txdata_octets;
1638         stats->rxdata_octets = conn->rxdata_octets;
1639         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1640         stats->dataout_pdus = conn->dataout_pdus_cnt;
1641         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1642         stats->datain_pdus = conn->datain_pdus_cnt;
1643         stats->r2t_pdus = conn->r2t_pdus_cnt;
1644         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1645         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1646         stats->custom_length = 3;
1647         strcpy(stats->custom[2].desc, "eh_abort_cnt");
1648         stats->custom[2].value = conn->eh_abort_cnt;
1649         stats->digest_err = 0;
1650         stats->timeout_err = 0;
1651         stats->custom_length = 0;
1652 }
1653
1654
1655 /**
1656  * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1657  * @dst_addr:   target IP address
1658  *
1659  * check if route resolves to BNX2 device
1660  */
1661 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1662 {
1663         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1664         struct bnx2i_hba *hba;
1665         struct cnic_dev *cnic = NULL;
1666
1667         hba = get_adapter_list_head();
1668         if (hba && hba->cnic)
1669                 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1670         if (!cnic) {
1671                 printk(KERN_ALERT "bnx2i: no route,"
1672                        "can't connect using cnic\n");
1673                 goto no_nx2_route;
1674         }
1675         hba = bnx2i_find_hba_for_cnic(cnic);
1676         if (!hba)
1677                 goto no_nx2_route;
1678
1679         if (bnx2i_adapter_ready(hba)) {
1680                 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1681                 goto no_nx2_route;
1682         }
1683         if (hba->netdev->mtu > hba->mtu_supported) {
1684                 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1685                                   hba->netdev->name, hba->netdev->mtu);
1686                 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1687                                   hba->mtu_supported);
1688                 goto no_nx2_route;
1689         }
1690         return hba;
1691 no_nx2_route:
1692         return NULL;
1693 }
1694
1695
1696 /**
1697  * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1698  * @hba:        pointer to adapter instance
1699  * @ep:         endpoint (transport identifier) structure
1700  *
1701  * destroys cm_sock structure and on chip iscsi context
1702  */
1703 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1704                                  struct bnx2i_endpoint *ep)
1705 {
1706         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)
1707                 hba->cnic->cm_destroy(ep->cm_sk);
1708
1709         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1710             ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1711                 if (ep->conn && ep->conn->cls_conn &&
1712                     ep->conn->cls_conn->dd_data) {
1713                         struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;
1714
1715                         /* Must suspend all rx queue activity for this ep */
1716                         set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
1717                 }
1718                 /* CONN_DISCONNECT timeout may or may not be an issue depending
1719                  * on what transcribed in TCP layer, different targets behave
1720                  * differently
1721                  */
1722                 printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "
1723                                   "please submit GRC Dump, NW/PCIe trace, "
1724                                   "driver msgs to developers for analysis\n",
1725                                   hba->netdev->name);
1726         }
1727
1728         ep->state = EP_STATE_CLEANUP_START;
1729         init_timer(&ep->ofld_timer);
1730         ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
1731         ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1732         ep->ofld_timer.data = (unsigned long) ep;
1733         add_timer(&ep->ofld_timer);
1734
1735         bnx2i_ep_destroy_list_add(hba, ep);
1736
1737         /* destroy iSCSI context, wait for it to complete */
1738         if (bnx2i_send_conn_destroy(hba, ep))
1739                 ep->state = EP_STATE_CLEANUP_CMPL;
1740
1741         wait_event_interruptible(ep->ofld_wait,
1742                                  (ep->state != EP_STATE_CLEANUP_START));
1743
1744         if (signal_pending(current))
1745                 flush_signals(current);
1746         del_timer_sync(&ep->ofld_timer);
1747
1748         bnx2i_ep_destroy_list_del(hba, ep);
1749
1750         if (ep->state != EP_STATE_CLEANUP_CMPL)
1751                 /* should never happen */
1752                 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1753
1754         return 0;
1755 }
1756
1757
1758 /**
1759  * bnx2i_ep_connect - establish TCP connection to target portal
1760  * @shost:              scsi host
1761  * @dst_addr:           target IP address
1762  * @non_blocking:       blocking or non-blocking call
1763  *
1764  * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1765  *      with l5_core and the CNIC. This is a multi-step process of resolving
1766  *      route to target, create a iscsi connection context, handshaking with
1767  *      CNIC module to create/initialize the socket struct and finally
1768  *      sending down option-2 request to complete TCP 3-way handshake
1769  */
1770 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1771                                                struct sockaddr *dst_addr,
1772                                                int non_blocking)
1773 {
1774         u32 iscsi_cid = BNX2I_CID_RESERVED;
1775         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1776         struct sockaddr_in6 *desti6;
1777         struct bnx2i_endpoint *bnx2i_ep;
1778         struct bnx2i_hba *hba;
1779         struct cnic_dev *cnic;
1780         struct cnic_sockaddr saddr;
1781         struct iscsi_endpoint *ep;
1782         int rc = 0;
1783
1784         if (shost) {
1785                 /* driver is given scsi host to work with */
1786                 hba = iscsi_host_priv(shost);
1787         } else
1788                 /*
1789                  * check if the given destination can be reached through
1790                  * a iscsi capable NetXtreme2 device
1791                  */
1792                 hba = bnx2i_check_route(dst_addr);
1793
1794         if (!hba) {
1795                 rc = -EINVAL;
1796                 goto nohba;
1797         }
1798         mutex_lock(&hba->net_dev_lock);
1799
1800         if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) {
1801                 rc = -EPERM;
1802                 goto check_busy;
1803         }
1804         cnic = hba->cnic;
1805         ep = bnx2i_alloc_ep(hba);
1806         if (!ep) {
1807                 rc = -ENOMEM;
1808                 goto check_busy;
1809         }
1810         bnx2i_ep = ep->dd_data;
1811
1812         atomic_set(&bnx2i_ep->num_active_cmds, 0);
1813         iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1814         if (iscsi_cid == -1) {
1815                 printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate "
1816                         "iscsi cid\n", hba->netdev->name);
1817                 rc = -ENOMEM;
1818                 bnx2i_free_ep(ep);
1819                 goto check_busy;
1820         }
1821         bnx2i_ep->hba_age = hba->age;
1822
1823         rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1824         if (rc != 0) {
1825                 printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error"
1826                         "\n", hba->netdev->name);
1827                 rc = -ENOMEM;
1828                 goto qp_resc_err;
1829         }
1830
1831         bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1832         bnx2i_ep->state = EP_STATE_OFLD_START;
1833         bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1834
1835         init_timer(&bnx2i_ep->ofld_timer);
1836         bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1837         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1838         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1839         add_timer(&bnx2i_ep->ofld_timer);
1840
1841         if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) {
1842                 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1843                         printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1844                                 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1845                         rc = -EBUSY;
1846                 } else
1847                         rc = -ENOSPC;
1848                 printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe"
1849                         "\n", hba->netdev->name);
1850                 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1851                 goto conn_failed;
1852         }
1853
1854         /* Wait for CNIC hardware to setup conn context and return 'cid' */
1855         wait_event_interruptible(bnx2i_ep->ofld_wait,
1856                                  bnx2i_ep->state != EP_STATE_OFLD_START);
1857
1858         if (signal_pending(current))
1859                 flush_signals(current);
1860         del_timer_sync(&bnx2i_ep->ofld_timer);
1861
1862         bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1863
1864         if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1865                 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1866                         printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1867                                 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1868                         rc = -EBUSY;
1869                 } else
1870                         rc = -ENOSPC;
1871                 goto conn_failed;
1872         }
1873
1874         rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1875                              iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1876         if (rc) {
1877                 rc = -EINVAL;
1878                 /* Need to terminate and cleanup the connection */
1879                 goto release_ep;
1880         }
1881
1882         bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1883         bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1884         clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1885
1886         memset(&saddr, 0, sizeof(saddr));
1887         if (dst_addr->sa_family == AF_INET) {
1888                 desti = (struct sockaddr_in *) dst_addr;
1889                 saddr.remote.v4 = *desti;
1890                 saddr.local.v4.sin_family = desti->sin_family;
1891         } else if (dst_addr->sa_family == AF_INET6) {
1892                 desti6 = (struct sockaddr_in6 *) dst_addr;
1893                 saddr.remote.v6 = *desti6;
1894                 saddr.local.v6.sin6_family = desti6->sin6_family;
1895         }
1896
1897         bnx2i_ep->timestamp = jiffies;
1898         bnx2i_ep->state = EP_STATE_CONNECT_START;
1899         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1900                 rc = -EINVAL;
1901                 goto conn_failed;
1902         } else
1903                 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1904         if (rc)
1905                 goto release_ep;
1906
1907         bnx2i_ep_active_list_add(hba, bnx2i_ep);
1908
1909         if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1910                 goto del_active_ep;
1911
1912         mutex_unlock(&hba->net_dev_lock);
1913         return ep;
1914
1915 del_active_ep:
1916         bnx2i_ep_active_list_del(hba, bnx2i_ep);
1917 release_ep:
1918         if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1919                 mutex_unlock(&hba->net_dev_lock);
1920                 return ERR_PTR(rc);
1921         }
1922 conn_failed:
1923         bnx2i_free_qp_resc(hba, bnx2i_ep);
1924 qp_resc_err:
1925         bnx2i_free_ep(ep);
1926 check_busy:
1927         mutex_unlock(&hba->net_dev_lock);
1928 nohba:
1929         return ERR_PTR(rc);
1930 }
1931
1932
1933 /**
1934  * bnx2i_ep_poll - polls for TCP connection establishement
1935  * @ep:                 TCP connection (endpoint) handle
1936  * @timeout_ms:         timeout value in milli secs
1937  *
1938  * polls for TCP connect request to complete
1939  */
1940 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1941 {
1942         struct bnx2i_endpoint *bnx2i_ep;
1943         int rc = 0;
1944
1945         bnx2i_ep = ep->dd_data;
1946         if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1947             (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1948             (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1949                 return -1;
1950         if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1951                 return 1;
1952
1953         rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1954                                               ((bnx2i_ep->state ==
1955                                                 EP_STATE_OFLD_FAILED) ||
1956                                                (bnx2i_ep->state ==
1957                                                 EP_STATE_CONNECT_FAILED) ||
1958                                                (bnx2i_ep->state ==
1959                                                 EP_STATE_CONNECT_COMPL)),
1960                                               msecs_to_jiffies(timeout_ms));
1961         if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
1962                 rc = -1;
1963
1964         if (rc > 0)
1965                 return 1;
1966         else if (!rc)
1967                 return 0;       /* timeout */
1968         else
1969                 return rc;
1970 }
1971
1972
1973 /**
1974  * bnx2i_ep_tcp_conn_active - check EP state transition
1975  * @ep:         endpoint pointer
1976  *
1977  * check if underlying TCP connection is active
1978  */
1979 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1980 {
1981         int ret;
1982         int cnic_dev_10g = 0;
1983
1984         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1985                 cnic_dev_10g = 1;
1986
1987         switch (bnx2i_ep->state) {
1988         case EP_STATE_CLEANUP_FAILED:
1989         case EP_STATE_OFLD_FAILED:
1990         case EP_STATE_DISCONN_TIMEDOUT:
1991                 ret = 0;
1992                 break;
1993         case EP_STATE_CONNECT_START:
1994         case EP_STATE_CONNECT_FAILED:
1995         case EP_STATE_CONNECT_COMPL:
1996         case EP_STATE_ULP_UPDATE_START:
1997         case EP_STATE_ULP_UPDATE_COMPL:
1998         case EP_STATE_TCP_FIN_RCVD:
1999         case EP_STATE_LOGOUT_SENT:
2000         case EP_STATE_LOGOUT_RESP_RCVD:
2001         case EP_STATE_ULP_UPDATE_FAILED:
2002                 ret = 1;
2003                 break;
2004         case EP_STATE_TCP_RST_RCVD:
2005                 if (cnic_dev_10g)
2006                         ret = 0;
2007                 else
2008                         ret = 1;
2009                 break;
2010         default:
2011                 ret = 0;
2012         }
2013
2014         return ret;
2015 }
2016
2017
2018 /*
2019  * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
2020  * @ep:         TCP connection (bnx2i endpoint) handle
2021  *
2022  * executes  TCP connection teardown process
2023  */
2024 int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
2025 {
2026         struct bnx2i_hba *hba = bnx2i_ep->hba;
2027         struct cnic_dev *cnic;
2028         struct iscsi_session *session = NULL;
2029         struct iscsi_conn *conn = NULL;
2030         int ret = 0;
2031         int close = 0;
2032         int close_ret = 0;
2033
2034         if (!hba)
2035                 return 0;
2036
2037         cnic = hba->cnic;
2038         if (!cnic)
2039                 return 0;
2040
2041         if (bnx2i_ep->state == EP_STATE_IDLE ||
2042             bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2043                 return 0;
2044
2045         if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
2046                 goto destroy_conn;
2047
2048         if (bnx2i_ep->conn) {
2049                 conn = bnx2i_ep->conn->cls_conn->dd_data;
2050                 session = conn->session;
2051         }
2052
2053         init_timer(&bnx2i_ep->ofld_timer);
2054         bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
2055         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
2056         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
2057         add_timer(&bnx2i_ep->ofld_timer);
2058
2059         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
2060                 goto out;
2061
2062         if (session) {
2063                 spin_lock_bh(&session->lock);
2064                 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
2065                         if (session->state == ISCSI_STATE_LOGGING_OUT) {
2066                                 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
2067                                         /* Logout sent, but no resp */
2068                                         printk(KERN_ALERT "bnx2i (%s): WARNING"
2069                                                 " logout response was not "
2070                                                 "received!\n",
2071                                                 bnx2i_ep->hba->netdev->name);
2072                                 } else if (bnx2i_ep->state ==
2073                                            EP_STATE_LOGOUT_RESP_RCVD)
2074                                         close = 1;
2075                         }
2076                 } else
2077                         close = 1;
2078
2079                 spin_unlock_bh(&session->lock);
2080         }
2081
2082         bnx2i_ep->state = EP_STATE_DISCONN_START;
2083
2084         if (close)
2085                 close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
2086         else
2087                 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);
2088
2089         if (close_ret)
2090                 printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n",
2091                         bnx2i_ep->hba->netdev->name, close, close_ret);
2092         else
2093                 /* wait for option-2 conn teardown */
2094                 wait_event_interruptible(bnx2i_ep->ofld_wait,
2095                                  bnx2i_ep->state != EP_STATE_DISCONN_START);
2096
2097         if (signal_pending(current))
2098                 flush_signals(current);
2099         del_timer_sync(&bnx2i_ep->ofld_timer);
2100
2101 destroy_conn:
2102         bnx2i_ep_active_list_del(hba, bnx2i_ep);
2103         if (bnx2i_tear_down_conn(hba, bnx2i_ep))
2104                 return -EINVAL;
2105 out:
2106         bnx2i_ep->state = EP_STATE_IDLE;
2107         return ret;
2108 }
2109
2110
2111 /**
2112  * bnx2i_ep_disconnect - executes TCP connection teardown process
2113  * @ep:         TCP connection (iscsi endpoint) handle
2114  *
2115  * executes  TCP connection teardown process
2116  */
2117 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
2118 {
2119         struct bnx2i_endpoint *bnx2i_ep;
2120         struct bnx2i_conn *bnx2i_conn = NULL;
2121         struct iscsi_conn *conn = NULL;
2122         struct bnx2i_hba *hba;
2123
2124         bnx2i_ep = ep->dd_data;
2125
2126         /* driver should not attempt connection cleanup until TCP_CONNECT
2127          * completes either successfully or fails. Timeout is 9-secs, so
2128          * wait for it to complete
2129          */
2130         while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
2131                 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
2132                 msleep(250);
2133
2134         if (bnx2i_ep->conn) {
2135                 bnx2i_conn = bnx2i_ep->conn;
2136                 conn = bnx2i_conn->cls_conn->dd_data;
2137                 iscsi_suspend_queue(conn);
2138         }
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  * @buf:        pointer to buffer containing iscsi path message
2177  *
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                         return S_IRUGO;
2238                 default:
2239                         return 0;
2240                 }
2241         }
2242
2243         return 0;
2244 }
2245
2246 /*
2247  * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2248  * used while registering with the scsi host and iSCSI transport module.
2249  */
2250 static struct scsi_host_template bnx2i_host_template = {
2251         .module                 = THIS_MODULE,
2252         .name                   = "Broadcom Offload iSCSI Initiator",
2253         .proc_name              = "bnx2i",
2254         .queuecommand           = iscsi_queuecommand,
2255         .eh_abort_handler       = iscsi_eh_abort,
2256         .eh_device_reset_handler = iscsi_eh_device_reset,
2257         .eh_target_reset_handler = iscsi_eh_recover_target,
2258         .change_queue_depth     = iscsi_change_queue_depth,
2259         .target_alloc           = iscsi_target_alloc,
2260         .can_queue              = 2048,
2261         .max_sectors            = 127,
2262         .cmd_per_lun            = 128,
2263         .this_id                = -1,
2264         .use_clustering         = ENABLE_CLUSTERING,
2265         .sg_tablesize           = ISCSI_MAX_BDS_PER_CMD,
2266         .shost_attrs            = bnx2i_dev_attributes,
2267 };
2268
2269 struct iscsi_transport bnx2i_iscsi_transport = {
2270         .owner                  = THIS_MODULE,
2271         .name                   = "bnx2i",
2272         .caps                   = CAP_RECOVERY_L0 | CAP_HDRDGST |
2273                                   CAP_MULTI_R2T | CAP_DATADGST |
2274                                   CAP_DATA_PATH_OFFLOAD |
2275                                   CAP_TEXT_NEGO,
2276         .create_session         = bnx2i_session_create,
2277         .destroy_session        = bnx2i_session_destroy,
2278         .create_conn            = bnx2i_conn_create,
2279         .bind_conn              = bnx2i_conn_bind,
2280         .destroy_conn           = bnx2i_conn_destroy,
2281         .attr_is_visible        = bnx2i_attr_is_visible,
2282         .set_param              = iscsi_set_param,
2283         .get_conn_param         = iscsi_conn_get_param,
2284         .get_session_param      = iscsi_session_get_param,
2285         .get_host_param         = bnx2i_host_get_param,
2286         .start_conn             = bnx2i_conn_start,
2287         .stop_conn              = iscsi_conn_stop,
2288         .send_pdu               = iscsi_conn_send_pdu,
2289         .xmit_task              = bnx2i_task_xmit,
2290         .get_stats              = bnx2i_conn_get_stats,
2291         /* TCP connect - disconnect - option-2 interface calls */
2292         .get_ep_param           = bnx2i_ep_get_param,
2293         .ep_connect             = bnx2i_ep_connect,
2294         .ep_poll                = bnx2i_ep_poll,
2295         .ep_disconnect          = bnx2i_ep_disconnect,
2296         .set_path               = bnx2i_nl_set_path,
2297         /* Error recovery timeout call */
2298         .session_recovery_timedout = iscsi_session_recovery_timedout,
2299         .cleanup_task           = bnx2i_cleanup_task,
2300 };