drivers/scsi/bnx2i/bnx2i_iscsi.c

   1 /*
   2  * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver.
   3  *
   4  * Copyright (c) 2006 - 2009 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  */
  14
  15 #include <linux/slab.h>
  16 #include <scsi/scsi_tcq.h>
  17 #include <scsi/libiscsi.h>
  18 #include "bnx2i.h"
  19
  20 struct scsi_transport_template *bnx2i_scsi_xport_template;
  21 struct iscsi_transport bnx2i_iscsi_transport;
  22 static struct scsi_host_template bnx2i_host_template;
  23
  24 /*
  25  * Global endpoint resource info
  26  */
  27 static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
  28
  29
  30 static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
  31 {
  32         int retval = 0;
  33
  34         if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
  35             test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
  36             test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
  37                 retval = -EPERM;
  38         return retval;
  39 }
  40
  41 /**
  42  * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
  43  * @cmd:                iscsi cmd struct pointer
  44  * @buf_off:            absolute buffer offset
  45  * @start_bd_off:       u32 pointer to return the offset within the BD
  46  *                      indicated by 'start_bd_idx' on which 'buf_off' falls
  47  * @start_bd_idx:       index of the BD on which 'buf_off' falls
  48  *
  49  * identifies & marks various bd info for scsi command's imm data,
  50  * unsolicited data and the first solicited data seq.
  51  */
  52 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
  53                                        u32 *start_bd_off, u32 *start_bd_idx)
  54 {
  55         struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
  56         u32 cur_offset = 0;
  57         u32 cur_bd_idx = 0;
  58
  59         if (buf_off) {
  60                 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
  61                         cur_offset += bd_tbl->buffer_length;
  62                         cur_bd_idx++;
  63                         bd_tbl++;
  64                 }
  65         }
  66
  67         *start_bd_off = buf_off - cur_offset;
  68         *start_bd_idx = cur_bd_idx;
  69 }
  70
  71 /**
  72  * bnx2i_setup_write_cmd_bd_info - sets up BD various information
  73  * @task:       transport layer's cmd struct pointer
  74  *
  75  * identifies & marks various bd info for scsi command's immediate data,
  76  * unsolicited data and first solicited data seq which includes BD start
  77  * index & BD buf off. his function takes into account iscsi parameter such
  78  * as immediate data and unsolicited data is support on this connection.
  79  */
  80 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
  81 {
  82         struct bnx2i_cmd *cmd = task->dd_data;
  83         u32 start_bd_offset;
  84         u32 start_bd_idx;
  85         u32 buffer_offset = 0;
  86         u32 cmd_len = cmd->req.total_data_transfer_length;
  87
  88         /* if ImmediateData is turned off & IntialR2T is turned on,
  89          * there will be no immediate or unsolicited data, just return.
  90          */
  91         if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
  92                 return;
  93
  94         /* Immediate data */
  95         buffer_offset += task->imm_count;
  96         if (task->imm_count == cmd_len)
  97                 return;
  98
  99         if (iscsi_task_has_unsol_data(task)) {
 100                 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
 101                                            &start_bd_offset, &start_bd_idx);
 102                 cmd->req.ud_buffer_offset = start_bd_offset;
 103                 cmd->req.ud_start_bd_index = start_bd_idx;
 104                 buffer_offset += task->unsol_r2t.data_length;
 105         }
 106
 107         if (buffer_offset != cmd_len) {
 108                 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
 109                                            &start_bd_offset, &start_bd_idx);
 110                 if ((start_bd_offset > task->conn->session->first_burst) ||
 111                     (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
 112                         int i = 0;
 113
 114                         iscsi_conn_printk(KERN_ALERT, task->conn,
 115                                           "bnx2i- error, buf offset 0x%x "
 116                                           "bd_valid %d use_sg %d\n",
 117                                           buffer_offset, cmd->io_tbl.bd_valid,
 118                                           scsi_sg_count(cmd->scsi_cmd));
 119                         for (i = 0; i < cmd->io_tbl.bd_valid; i++)
 120                                 iscsi_conn_printk(KERN_ALERT, task->conn,
 121                                                   "bnx2i err, bd[%d]: len %x\n",
 122                                                   i, cmd->io_tbl.bd_tbl[i].\
 123                                                   buffer_length);
 124                 }
 125                 cmd->req.sd_buffer_offset = start_bd_offset;
 126                 cmd->req.sd_start_bd_index = start_bd_idx;
 127         }
 128 }
 129
 130
 131
 132 /**
 133  * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
 134  * @hba:        adapter instance
 135  * @cmd:        iscsi cmd struct pointer
 136  *
 137  * map SG list
 138  */
 139 static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
 140 {
 141         struct scsi_cmnd *sc = cmd->scsi_cmd;
 142         struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
 143         struct scatterlist *sg;
 144         int byte_count = 0;
 145         int bd_count = 0;
 146         int sg_count;
 147         int sg_len;
 148         u64 addr;
 149         int i;
 150
 151         BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
 152
 153         sg_count = scsi_dma_map(sc);
 154
 155         scsi_for_each_sg(sc, sg, sg_count, i) {
 156                 sg_len = sg_dma_len(sg);
 157                 addr = (u64) sg_dma_address(sg);
 158                 bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
 159                 bd[bd_count].buffer_addr_hi = addr >> 32;
 160                 bd[bd_count].buffer_length = sg_len;
 161                 bd[bd_count].flags = 0;
 162                 if (bd_count == 0)
 163                         bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
 164
 165                 byte_count += sg_len;
 166                 bd_count++;
 167         }
 168
 169         if (bd_count)
 170                 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
 171
 172         BUG_ON(byte_count != scsi_bufflen(sc));
 173         return bd_count;
 174 }
 175
 176 /**
 177  * bnx2i_iscsi_map_sg_list - maps SG list
 178  * @cmd:        iscsi cmd struct pointer
 179  *
 180  * creates BD list table for the command
 181  */
 182 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
 183 {
 184         int bd_count;
 185
 186         bd_count  = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
 187         if (!bd_count) {
 188                 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
 189
 190                 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
 191                 bd[0].buffer_length = bd[0].flags = 0;
 192         }
 193         cmd->io_tbl.bd_valid = bd_count;
 194 }
 195
 196
 197 /**
 198  * bnx2i_iscsi_unmap_sg_list - unmaps SG list
 199  * @cmd:        iscsi cmd struct pointer
 200  *
 201  * unmap IO buffers and invalidate the BD table
 202  */
 203 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
 204 {
 205         struct scsi_cmnd *sc = cmd->scsi_cmd;
 206
 207         if (cmd->io_tbl.bd_valid && sc) {
 208                 scsi_dma_unmap(sc);
 209                 cmd->io_tbl.bd_valid = 0;
 210         }
 211 }
 212
 213 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
 214 {
 215         memset(&cmd->req, 0x00, sizeof(cmd->req));
 216         cmd->req.op_code = 0xFF;
 217         cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
 218         cmd->req.bd_list_addr_hi =
 219                 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
 220
 221 }
 222
 223
 224 /**
 225  * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
 226  * @hba:        pointer to adapter instance
 227  * @conn:       pointer to iscsi connection
 228  * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
 229  *
 230  * update iscsi cid table entry with connection pointer. This enables
 231  *      driver to quickly get hold of connection structure pointer in
 232  *      completion/interrupt thread using iscsi context ID
 233  */
 234 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
 235                                         struct bnx2i_conn *bnx2i_conn,
 236                                         u32 iscsi_cid)
 237 {
 238         if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
 239                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
 240                                  "conn bind - entry #%d not free\n", iscsi_cid);
 241                 return -EBUSY;
 242         }
 243
 244         hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
 245         return 0;
 246 }
 247
 248
 249 /**
 250  * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
 251  * @hba:        pointer to adapter instance
 252  * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
 253  */
 254 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
 255                                           u16 iscsi_cid)
 256 {
 257         if (!hba->cid_que.conn_cid_tbl) {
 258                 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
 259                 return NULL;
 260
 261         } else if (iscsi_cid >= hba->max_active_conns) {
 262                 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
 263                 return NULL;
 264         }
 265         return hba->cid_que.conn_cid_tbl[iscsi_cid];
 266 }
 267
 268
 269 /**
 270  * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
 271  * @hba:        pointer to adapter instance
 272  */
 273 static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
 274 {
 275         int idx;
 276
 277         if (!hba->cid_que.cid_free_cnt)
 278                 return -1;
 279
 280         idx = hba->cid_que.cid_q_cons_idx;
 281         hba->cid_que.cid_q_cons_idx++;
 282         if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
 283                 hba->cid_que.cid_q_cons_idx = 0;
 284
 285         hba->cid_que.cid_free_cnt--;
 286         return hba->cid_que.cid_que[idx];
 287 }
 288
 289
 290 /**
 291  * bnx2i_free_iscsi_cid - returns tcp port to free list
 292  * @hba:                pointer to adapter instance
 293  * @iscsi_cid:          iscsi context ID to free
 294  */
 295 static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
 296 {
 297         int idx;
 298
 299         if (iscsi_cid == (u16) -1)
 300                 return;
 301
 302         hba->cid_que.cid_free_cnt++;
 303
 304         idx = hba->cid_que.cid_q_prod_idx;
 305         hba->cid_que.cid_que[idx] = iscsi_cid;
 306         hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
 307         hba->cid_que.cid_q_prod_idx++;
 308         if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
 309                 hba->cid_que.cid_q_prod_idx = 0;
 310 }
 311
 312
 313 /**
 314  * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
 315  * @hba:        pointer to adapter instance
 316  *
 317  * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
 318  *      and initialize table attributes
 319  */
 320 static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
 321 {
 322         int mem_size;
 323         int i;
 324
 325         mem_size = hba->max_active_conns * sizeof(u32);
 326         mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 327
 328         hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
 329         if (!hba->cid_que.cid_que_base)
 330                 return -ENOMEM;
 331
 332         mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
 333         mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 334         hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
 335         if (!hba->cid_que.conn_cid_tbl) {
 336                 kfree(hba->cid_que.cid_que_base);
 337                 hba->cid_que.cid_que_base = NULL;
 338                 return -ENOMEM;
 339         }
 340
 341         hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
 342         hba->cid_que.cid_q_prod_idx = 0;
 343         hba->cid_que.cid_q_cons_idx = 0;
 344         hba->cid_que.cid_q_max_idx = hba->max_active_conns;
 345         hba->cid_que.cid_free_cnt = hba->max_active_conns;
 346
 347         for (i = 0; i < hba->max_active_conns; i++) {
 348                 hba->cid_que.cid_que[i] = i;
 349                 hba->cid_que.conn_cid_tbl[i] = NULL;
 350         }
 351         return 0;
 352 }
 353
 354
 355 /**
 356  * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
 357  * @hba:        pointer to adapter instance
 358  */
 359 static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
 360 {
 361         kfree(hba->cid_que.cid_que_base);
 362         hba->cid_que.cid_que_base = NULL;
 363
 364         kfree(hba->cid_que.conn_cid_tbl);
 365         hba->cid_que.conn_cid_tbl = NULL;
 366 }
 367
 368
 369 /**
 370  * bnx2i_alloc_ep - allocates ep structure from global pool
 371  * @hba:        pointer to adapter instance
 372  *
 373  * routine allocates a free endpoint structure from global pool and
 374  *      a tcp port to be used for this connection.  Global resource lock,
 375  *      'bnx2i_resc_lock' is held while accessing shared global data structures
 376  */
 377 static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
 378 {
 379         struct iscsi_endpoint *ep;
 380         struct bnx2i_endpoint *bnx2i_ep;
 381
 382         ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
 383         if (!ep) {
 384                 printk(KERN_ERR "bnx2i: Could not allocate ep\n");
 385                 return NULL;
 386         }
 387
 388         bnx2i_ep = ep->dd_data;
 389         INIT_LIST_HEAD(&bnx2i_ep->link);
 390         bnx2i_ep->state = EP_STATE_IDLE;
 391         bnx2i_ep->ep_iscsi_cid = (u16) -1;
 392         bnx2i_ep->hba = hba;
 393         bnx2i_ep->hba_age = hba->age;
 394         hba->ofld_conns_active++;
 395         init_waitqueue_head(&bnx2i_ep->ofld_wait);
 396         return ep;
 397 }
 398
 399
 400 /**
 401  * bnx2i_free_ep - free endpoint
 402  * @ep:         pointer to iscsi endpoint structure
 403  */
 404 static void bnx2i_free_ep(struct iscsi_endpoint *ep)
 405 {
 406         struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
 407         unsigned long flags;
 408
 409         spin_lock_irqsave(&bnx2i_resc_lock, flags);
 410         bnx2i_ep->state = EP_STATE_IDLE;
 411         bnx2i_ep->hba->ofld_conns_active--;
 412
 413         bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
 414         if (bnx2i_ep->conn) {
 415                 bnx2i_ep->conn->ep = NULL;
 416                 bnx2i_ep->conn = NULL;
 417         }
 418
 419         bnx2i_ep->hba = NULL;
 420         spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
 421         iscsi_destroy_endpoint(ep);
 422 }
 423
 424
 425 /**
 426  * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
 427  * @hba:        adapter instance pointer
 428  * @session:    iscsi session pointer
 429  * @cmd:        iscsi command structure
 430  */
 431 static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
 432                            struct bnx2i_cmd *cmd)
 433 {
 434         struct io_bdt *io = &cmd->io_tbl;
 435         struct iscsi_bd *bd;
 436
 437         io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
 438                                         ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
 439                                         &io->bd_tbl_dma, GFP_KERNEL);
 440         if (!io->bd_tbl) {
 441                 iscsi_session_printk(KERN_ERR, session, "Could not "
 442                                      "allocate bdt.\n");
 443                 return -ENOMEM;
 444         }
 445         io->bd_valid = 0;
 446         return 0;
 447 }
 448
 449 /**
 450  * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
 451  * @hba:        adapter instance pointer
 452  * @session:    iscsi session pointer
 453  * @cmd:        iscsi command structure
 454  */
 455 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
 456                                    struct iscsi_session *session)
 457 {
 458         int i;
 459
 460         for (i = 0; i < session->cmds_max; i++) {
 461                 struct iscsi_task *task = session->cmds[i];
 462                 struct bnx2i_cmd *cmd = task->dd_data;
 463
 464                 if (cmd->io_tbl.bd_tbl)
 465                         dma_free_coherent(&hba->pcidev->dev,
 466                                           ISCSI_MAX_BDS_PER_CMD *
 467                                           sizeof(struct iscsi_bd),
 468                                           cmd->io_tbl.bd_tbl,
 469                                           cmd->io_tbl.bd_tbl_dma);
 470         }
 471
 472 }
 473
 474
 475 /**
 476  * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
 477  * @hba:        adapter instance pointer
 478  * @session:    iscsi session pointer
 479  */
 480 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
 481                                 struct iscsi_session *session)
 482 {
 483         int i;
 484
 485         for (i = 0; i < session->cmds_max; i++) {
 486                 struct iscsi_task *task = session->cmds[i];
 487                 struct bnx2i_cmd *cmd = task->dd_data;
 488
 489                 task->hdr = &cmd->hdr;
 490                 task->hdr_max = sizeof(struct iscsi_hdr);
 491
 492                 if (bnx2i_alloc_bdt(hba, session, cmd))
 493                         goto free_bdts;
 494         }
 495
 496         return 0;
 497
 498 free_bdts:
 499         bnx2i_destroy_cmd_pool(hba, session);
 500         return -ENOMEM;
 501 }
 502
 503
 504 /**
 505  * bnx2i_setup_mp_bdt - allocate BD table resources
 506  * @hba:        pointer to adapter structure
 507  *
 508  * Allocate memory for dummy buffer and associated BD
 509  * table to be used by middle path (MP) requests
 510  */
 511 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
 512 {
 513         int rc = 0;
 514         struct iscsi_bd *mp_bdt;
 515         u64 addr;
 516
 517         hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
 518                                             &hba->mp_bd_dma, GFP_KERNEL);
 519         if (!hba->mp_bd_tbl) {
 520                 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
 521                 rc = -1;
 522                 goto out;
 523         }
 524
 525         hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
 526                                                &hba->dummy_buf_dma, GFP_KERNEL);
 527         if (!hba->dummy_buffer) {
 528                 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
 529                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
 530                                   hba->mp_bd_tbl, hba->mp_bd_dma);
 531                 hba->mp_bd_tbl = NULL;
 532                 rc = -1;
 533                 goto out;
 534         }
 535
 536         mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
 537         addr = (unsigned long) hba->dummy_buf_dma;
 538         mp_bdt->buffer_addr_lo = addr & 0xffffffff;
 539         mp_bdt->buffer_addr_hi = addr >> 32;
 540         mp_bdt->buffer_length = PAGE_SIZE;
 541         mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
 542                         ISCSI_BD_FIRST_IN_BD_CHAIN;
 543 out:
 544         return rc;
 545 }
 546
 547
 548 /**
 549  * bnx2i_free_mp_bdt - releases ITT back to free pool
 550  * @hba:        pointer to adapter instance
 551  *
 552  * free MP dummy buffer and associated BD table
 553  */
 554 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
 555 {
 556         if (hba->mp_bd_tbl) {
 557                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
 558                                   hba->mp_bd_tbl, hba->mp_bd_dma);
 559                 hba->mp_bd_tbl = NULL;
 560         }
 561         if (hba->dummy_buffer) {
 562                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
 563                                   hba->dummy_buffer, hba->dummy_buf_dma);
 564                 hba->dummy_buffer = NULL;
 565         }
 566                 return;
 567 }
 568
 569 /**
 570  * bnx2i_drop_session - notifies iscsid of connection error.
 571  * @hba:        adapter instance pointer
 572  * @session:    iscsi session pointer
 573  *
 574  * This notifies iscsid that there is a error, so it can initiate
 575  * recovery.
 576  *
 577  * This relies on caller using the iscsi class iterator so the object
 578  * is refcounted and does not disapper from under us.
 579  */
 580 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
 581 {
 582         iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
 583 }
 584
 585 /**
 586  * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
 587  * @hba:        pointer to adapter instance
 588  * @ep:         pointer to endpoint (transport indentifier) structure
 589  *
 590  * EP destroy queue manager
 591  */
 592 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
 593                                      struct bnx2i_endpoint *ep)
 594 {
 595         write_lock_bh(&hba->ep_rdwr_lock);
 596         list_add_tail(&ep->link, &hba->ep_destroy_list);
 597         write_unlock_bh(&hba->ep_rdwr_lock);
 598         return 0;
 599 }
 600
 601 /**
 602  * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
 603  *
 604  * @hba:                pointer to adapter instance
 605  * @ep:                 pointer to endpoint (transport indentifier) structure
 606  *
 607  * EP destroy queue manager
 608  */
 609 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
 610                                      struct bnx2i_endpoint *ep)
 611 {
 612         write_lock_bh(&hba->ep_rdwr_lock);
 613         list_del_init(&ep->link);
 614         write_unlock_bh(&hba->ep_rdwr_lock);
 615
 616         return 0;
 617 }
 618
 619 /**
 620  * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
 621  * @hba:        pointer to adapter instance
 622  * @ep:         pointer to endpoint (transport indentifier) structure
 623  *
 624  * pending conn offload completion queue manager
 625  */
 626 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
 627                                   struct bnx2i_endpoint *ep)
 628 {
 629         write_lock_bh(&hba->ep_rdwr_lock);
 630         list_add_tail(&ep->link, &hba->ep_ofld_list);
 631         write_unlock_bh(&hba->ep_rdwr_lock);
 632         return 0;
 633 }
 634
 635 /**
 636  * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
 637  * @hba:                pointer to adapter instance
 638  * @ep:                 pointer to endpoint (transport indentifier) structure
 639  *
 640  * pending conn offload completion queue manager
 641  */
 642 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
 643                                   struct bnx2i_endpoint *ep)
 644 {
 645         write_lock_bh(&hba->ep_rdwr_lock);
 646         list_del_init(&ep->link);
 647         write_unlock_bh(&hba->ep_rdwr_lock);
 648         return 0;
 649 }
 650
 651
 652 /**
 653  * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
 654  *
 655  * @hba:                pointer to adapter instance
 656  * @iscsi_cid:          iscsi context ID to find
 657  *
 658  */
 659 struct bnx2i_endpoint *
 660 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
 661 {
 662         struct list_head *list;
 663         struct list_head *tmp;
 664         struct bnx2i_endpoint *ep;
 665
 666         read_lock_bh(&hba->ep_rdwr_lock);
 667         list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
 668                 ep = (struct bnx2i_endpoint *)list;
 669
 670                 if (ep->ep_iscsi_cid == iscsi_cid)
 671                         break;
 672                 ep = NULL;
 673         }
 674         read_unlock_bh(&hba->ep_rdwr_lock);
 675
 676         if (!ep)
 677                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
 678         return ep;
 679 }
 680
 681
 682 /**
 683  * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
 684  * @hba:                pointer to adapter instance
 685  * @iscsi_cid:          iscsi context ID to find
 686  *
 687  */
 688 struct bnx2i_endpoint *
 689 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
 690 {
 691         struct list_head *list;
 692         struct list_head *tmp;
 693         struct bnx2i_endpoint *ep;
 694
 695         read_lock_bh(&hba->ep_rdwr_lock);
 696         list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
 697                 ep = (struct bnx2i_endpoint *)list;
 698
 699                 if (ep->ep_iscsi_cid == iscsi_cid)
 700                         break;
 701                 ep = NULL;
 702         }
 703         read_unlock_bh(&hba->ep_rdwr_lock);
 704
 705         if (!ep)
 706                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
 707
 708         return ep;
 709 }
 710
 711 /**
 712  * bnx2i_setup_host_queue_size - assigns shost->can_queue param
 713  * @hba:        pointer to adapter instance
 714  * @shost:      scsi host pointer
 715  *
 716  * Initializes 'can_queue' parameter based on how many outstanding commands
 717  *      the device can handle. Each device 5708/5709/57710 has different
 718  *      capabilities
 719  */
 720 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
 721                                         struct Scsi_Host *shost)
 722 {
 723         if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
 724                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
 725         else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
 726                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
 727         else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
 728                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
 729         else
 730                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
 731 }
 732
 733
 734 /**
 735  * bnx2i_alloc_hba - allocate and init adapter instance
 736  * @cnic:       cnic device pointer
 737  *
 738  * allocate & initialize adapter structure and call other
 739  *      support routines to do per adapter initialization
 740  */
 741 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
 742 {
 743         struct Scsi_Host *shost;
 744         struct bnx2i_hba *hba;
 745
 746         shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
 747         if (!shost)
 748                 return NULL;
 749         shost->dma_boundary = cnic->pcidev->dma_mask;
 750         shost->transportt = bnx2i_scsi_xport_template;
 751         shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
 752         shost->max_channel = 0;
 753         shost->max_lun = 512;
 754         shost->max_cmd_len = 16;
 755
 756         hba = iscsi_host_priv(shost);
 757         hba->shost = shost;
 758         hba->netdev = cnic->netdev;
 759         /* Get PCI related information and update hba struct members */
 760         hba->pcidev = cnic->pcidev;
 761         pci_dev_get(hba->pcidev);
 762         hba->pci_did = hba->pcidev->device;
 763         hba->pci_vid = hba->pcidev->vendor;
 764         hba->pci_sdid = hba->pcidev->subsystem_device;
 765         hba->pci_svid = hba->pcidev->subsystem_vendor;
 766         hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
 767         hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
 768
 769         bnx2i_identify_device(hba);
 770         bnx2i_setup_host_queue_size(hba, shost);
 771
 772         if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
 773                 hba->regview = ioremap_nocache(hba->netdev->base_addr,
 774                                                BNX2_MQ_CONFIG2);
 775                 if (!hba->regview)
 776                         goto ioreg_map_err;
 777         } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 778                 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096);
 779                 if (!hba->regview)
 780                         goto ioreg_map_err;
 781         }
 782
 783         if (bnx2i_setup_mp_bdt(hba))
 784                 goto mp_bdt_mem_err;
 785
 786         INIT_LIST_HEAD(&hba->ep_ofld_list);
 787         INIT_LIST_HEAD(&hba->ep_destroy_list);
 788         rwlock_init(&hba->ep_rdwr_lock);
 789
 790         hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
 791
 792         /* different values for 5708/5709/57710 */
 793         hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
 794
 795         if (bnx2i_setup_free_cid_que(hba))
 796                 goto cid_que_err;
 797
 798         /* SQ/RQ/CQ size can be changed via sysfx interface */
 799         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 800                 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
 801                         hba->max_sqes = sq_size;
 802                 else
 803                         hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
 804         } else {        /* 5706/5708/5709 */
 805                 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
 806                         hba->max_sqes = sq_size;
 807                 else
 808                         hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
 809         }
 810
 811         hba->max_rqes = rq_size;
 812         hba->max_cqes = hba->max_sqes + rq_size;
 813         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 814                 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
 815                         hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
 816         } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
 817                 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
 818
 819         hba->num_ccell = hba->max_sqes / 2;
 820
 821         spin_lock_init(&hba->lock);
 822         mutex_init(&hba->net_dev_lock);
 823         init_waitqueue_head(&hba->eh_wait);
 824         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
 825                 hba->hba_shutdown_tmo = 240 * HZ;
 826         else    /* 5706/5708/5709 */
 827                 hba->hba_shutdown_tmo = 30 * HZ;
 828
 829         if (iscsi_host_add(shost, &hba->pcidev->dev))
 830                 goto free_dump_mem;
 831         return hba;
 832
 833 free_dump_mem:
 834         bnx2i_release_free_cid_que(hba);
 835 cid_que_err:
 836         bnx2i_free_mp_bdt(hba);
 837 mp_bdt_mem_err:
 838         if (hba->regview) {
 839                 iounmap(hba->regview);
 840                 hba->regview = NULL;
 841         }
 842 ioreg_map_err:
 843         pci_dev_put(hba->pcidev);
 844         scsi_host_put(shost);
 845         return NULL;
 846 }
 847
 848 /**
 849  * bnx2i_free_hba- releases hba structure and resources held by the adapter
 850  * @hba:        pointer to adapter instance
 851  *
 852  * free adapter structure and call various cleanup routines.
 853  */
 854 void bnx2i_free_hba(struct bnx2i_hba *hba)
 855 {
 856         struct Scsi_Host *shost = hba->shost;
 857
 858         iscsi_host_remove(shost);
 859         INIT_LIST_HEAD(&hba->ep_ofld_list);
 860         INIT_LIST_HEAD(&hba->ep_destroy_list);
 861         pci_dev_put(hba->pcidev);
 862
 863         if (hba->regview) {
 864                 iounmap(hba->regview);
 865                 hba->regview = NULL;
 866         }
 867         bnx2i_free_mp_bdt(hba);
 868         bnx2i_release_free_cid_que(hba);
 869         iscsi_host_free(shost);
 870 }
 871
 872 /**
 873  * bnx2i_conn_free_login_resources - free DMA resources used for login process
 874  * @hba:                pointer to adapter instance
 875  * @bnx2i_conn:         iscsi connection pointer
 876  *
 877  * Login related resources, mostly BDT & payload DMA memory is freed
 878  */
 879 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
 880                                             struct bnx2i_conn *bnx2i_conn)
 881 {
 882         if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
 883                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
 884                                   bnx2i_conn->gen_pdu.resp_bd_tbl,
 885                                   bnx2i_conn->gen_pdu.resp_bd_dma);
 886                 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
 887         }
 888
 889         if (bnx2i_conn->gen_pdu.req_bd_tbl) {
 890                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
 891                                   bnx2i_conn->gen_pdu.req_bd_tbl,
 892                                   bnx2i_conn->gen_pdu.req_bd_dma);
 893                 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
 894         }
 895
 896         if (bnx2i_conn->gen_pdu.resp_buf) {
 897                 dma_free_coherent(&hba->pcidev->dev,
 898                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
 899                                   bnx2i_conn->gen_pdu.resp_buf,
 900                                   bnx2i_conn->gen_pdu.resp_dma_addr);
 901                 bnx2i_conn->gen_pdu.resp_buf = NULL;
 902         }
 903
 904         if (bnx2i_conn->gen_pdu.req_buf) {
 905                 dma_free_coherent(&hba->pcidev->dev,
 906                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
 907                                   bnx2i_conn->gen_pdu.req_buf,
 908                                   bnx2i_conn->gen_pdu.req_dma_addr);
 909                 bnx2i_conn->gen_pdu.req_buf = NULL;
 910         }
 911 }
 912
 913 /**
 914  * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
 915  * @hba:                pointer to adapter instance
 916  * @bnx2i_conn:         iscsi connection pointer
 917  *
 918  * Mgmt task DNA resources are allocated in this routine.
 919  */
 920 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
 921                                             struct bnx2i_conn *bnx2i_conn)
 922 {
 923         /* Allocate memory for login request/response buffers */
 924         bnx2i_conn->gen_pdu.req_buf =
 925                 dma_alloc_coherent(&hba->pcidev->dev,
 926                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
 927                                    &bnx2i_conn->gen_pdu.req_dma_addr,
 928                                    GFP_KERNEL);
 929         if (bnx2i_conn->gen_pdu.req_buf == NULL)
 930                 goto login_req_buf_failure;
 931
 932         bnx2i_conn->gen_pdu.req_buf_size = 0;
 933         bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
 934
 935         bnx2i_conn->gen_pdu.resp_buf =
 936                 dma_alloc_coherent(&hba->pcidev->dev,
 937                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
 938                                    &bnx2i_conn->gen_pdu.resp_dma_addr,
 939                                    GFP_KERNEL);
 940         if (bnx2i_conn->gen_pdu.resp_buf == NULL)
 941                 goto login_resp_buf_failure;
 942
 943         bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
 944         bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
 945
 946         bnx2i_conn->gen_pdu.req_bd_tbl =
 947                 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
 948                                    &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
 949         if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
 950                 goto login_req_bd_tbl_failure;
 951
 952         bnx2i_conn->gen_pdu.resp_bd_tbl =
 953                 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
 954                                    &bnx2i_conn->gen_pdu.resp_bd_dma,
 955                                    GFP_KERNEL);
 956         if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
 957                 goto login_resp_bd_tbl_failure;
 958
 959         return 0;
 960
 961 login_resp_bd_tbl_failure:
 962         dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
 963                           bnx2i_conn->gen_pdu.req_bd_tbl,
 964                           bnx2i_conn->gen_pdu.req_bd_dma);
 965         bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
 966
 967 login_req_bd_tbl_failure:
 968         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
 969                           bnx2i_conn->gen_pdu.resp_buf,
 970                           bnx2i_conn->gen_pdu.resp_dma_addr);
 971         bnx2i_conn->gen_pdu.resp_buf = NULL;
 972 login_resp_buf_failure:
 973         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
 974                           bnx2i_conn->gen_pdu.req_buf,
 975                           bnx2i_conn->gen_pdu.req_dma_addr);
 976         bnx2i_conn->gen_pdu.req_buf = NULL;
 977 login_req_buf_failure:
 978         iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
 979                           "login resource alloc failed!!\n");
 980         return -ENOMEM;
 981
 982 }
 983
 984
 985 /**
 986  * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
 987  * @bnx2i_conn:         iscsi connection pointer
 988  *
 989  * Allocates buffers and BD tables before shipping requests to cnic
 990  *      for PDUs prepared by 'iscsid' daemon
 991  */
 992 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
 993 {
 994         struct iscsi_bd *bd_tbl;
 995
 996         bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
 997
 998         bd_tbl->buffer_addr_hi =
 999                 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
1000         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
1001         bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
1002                                 bnx2i_conn->gen_pdu.req_buf;
1003         bd_tbl->reserved0 = 0;
1004         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1005                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1006
1007         bd_tbl = (struct iscsi_bd  *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1008         bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1009         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1010         bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1011         bd_tbl->reserved0 = 0;
1012         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1013                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1014 }
1015
1016
1017 /**
1018  * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1019  * @task:       transport layer task pointer
1020  *
1021  * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1022  *      Nop-out and Logout requests flow through this path.
1023  */
1024 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1025 {
1026         struct bnx2i_cmd *cmd = task->dd_data;
1027         struct bnx2i_conn *bnx2i_conn = cmd->conn;
1028         int rc = 0;
1029         char *buf;
1030         int data_len;
1031
1032         bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1033         switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1034         case ISCSI_OP_LOGIN:
1035                 bnx2i_send_iscsi_login(bnx2i_conn, task);
1036                 break;
1037         case ISCSI_OP_NOOP_OUT:
1038                 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1039                 buf = bnx2i_conn->gen_pdu.req_buf;
1040                 if (data_len)
1041                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1042                                                      RESERVED_ITT,
1043                                                      buf, data_len, 1);
1044                 else
1045                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1046                                                      RESERVED_ITT,
1047                                                      NULL, 0, 1);
1048                 break;
1049         case ISCSI_OP_LOGOUT:
1050                 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1051                 break;
1052         case ISCSI_OP_SCSI_TMFUNC:
1053                 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1054                 break;
1055         default:
1056                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1057                                   "send_gen: unsupported op 0x%x\n",
1058                                   task->hdr->opcode);
1059         }
1060         return rc;
1061 }
1062
1063
1064 /**********************************************************************
1065  *              SCSI-ML Interface
1066  **********************************************************************/
1067
1068 /**
1069  * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1070  * @sc:         SCSI-ML command pointer
1071  * @cmd:        iscsi cmd pointer
1072  */
1073 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1074 {
1075         u32 dword;
1076         int lpcnt;
1077         u8 *srcp;
1078         u32 *dstp;
1079         u32 scsi_lun[2];
1080
1081         int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1082         cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1083         cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1084
1085         lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1086         srcp = (u8 *) sc->cmnd;
1087         dstp = (u32 *) cmd->req.cdb;
1088         while (lpcnt--) {
1089                 memcpy(&dword, (const void *) srcp, 4);
1090                 *dstp = cpu_to_be32(dword);
1091                 srcp += 4;
1092                 dstp++;
1093         }
1094         if (sc->cmd_len & 0x3) {
1095                 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1096                 *dstp = cpu_to_be32(dword);
1097         }
1098 }
1099
1100 static void bnx2i_cleanup_task(struct iscsi_task *task)
1101 {
1102         struct iscsi_conn *conn = task->conn;
1103         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1104         struct bnx2i_hba *hba = bnx2i_conn->hba;
1105
1106         /*
1107          * mgmt task or cmd was never sent to us to transmit.
1108          */
1109         if (!task->sc || task->state == ISCSI_TASK_PENDING)
1110                 return;
1111         /*
1112          * need to clean-up task context to claim dma buffers
1113          */
1114         if (task->state == ISCSI_TASK_ABRT_TMF) {
1115                 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1116
1117                 spin_unlock_bh(&conn->session->lock);
1118                 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1119                                 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1120                 spin_lock_bh(&conn->session->lock);
1121         }
1122         bnx2i_iscsi_unmap_sg_list(task->dd_data);
1123 }
1124
1125 /**
1126  * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1127  * @conn:       transport layer conn structure pointer
1128  * @task:       transport layer command structure pointer
1129  */
1130 static int
1131 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1132 {
1133         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1134         struct bnx2i_cmd *cmd = task->dd_data;
1135
1136         memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1137
1138         bnx2i_setup_cmd_wqe_template(cmd);
1139         bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1140         if (task->data_count) {
1141                 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1142                        task->data_count);
1143                 bnx2i_conn->gen_pdu.req_wr_ptr =
1144                         bnx2i_conn->gen_pdu.req_buf + task->data_count;
1145         }
1146         cmd->conn = conn->dd_data;
1147         cmd->scsi_cmd = NULL;
1148         return bnx2i_iscsi_send_generic_request(task);
1149 }
1150
1151 /**
1152  * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1153  * @task:       transport layer command structure pointer
1154  *
1155  * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1156  */
1157 static int bnx2i_task_xmit(struct iscsi_task *task)
1158 {
1159         struct iscsi_conn *conn = task->conn;
1160         struct iscsi_session *session = conn->session;
1161         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1162         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1163         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1164         struct scsi_cmnd *sc = task->sc;
1165         struct bnx2i_cmd *cmd = task->dd_data;
1166         struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
1167
1168         /*
1169          * If there is no scsi_cmnd this must be a mgmt task
1170          */
1171         if (!sc)
1172                 return bnx2i_mtask_xmit(conn, task);
1173
1174         bnx2i_setup_cmd_wqe_template(cmd);
1175         cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1176         cmd->conn = bnx2i_conn;
1177         cmd->scsi_cmd = sc;
1178         cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1179         cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1180
1181         bnx2i_iscsi_map_sg_list(cmd);
1182         bnx2i_cpy_scsi_cdb(sc, cmd);
1183
1184         cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1185         if (sc->sc_data_direction == DMA_TO_DEVICE) {
1186                 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1187                 cmd->req.itt = task->itt |
1188                         (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1189                 bnx2i_setup_write_cmd_bd_info(task);
1190         } else {
1191                 if (scsi_bufflen(sc))
1192                         cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1193                 cmd->req.itt = task->itt |
1194                         (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1195         }
1196
1197         cmd->req.num_bds = cmd->io_tbl.bd_valid;
1198         if (!cmd->io_tbl.bd_valid) {
1199                 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1200                 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1201                 cmd->req.num_bds = 1;
1202         }
1203
1204         bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1205         return 0;
1206 }
1207
1208 /**
1209  * bnx2i_session_create - create a new iscsi session
1210  * @cmds_max:           max commands supported
1211  * @qdepth:             scsi queue depth to support
1212  * @initial_cmdsn:      initial iscsi CMDSN to be used for this session
1213  *
1214  * Creates a new iSCSI session instance on given device.
1215  */
1216 static struct iscsi_cls_session *
1217 bnx2i_session_create(struct iscsi_endpoint *ep,
1218                      uint16_t cmds_max, uint16_t qdepth,
1219                      uint32_t initial_cmdsn)
1220 {
1221         struct Scsi_Host *shost;
1222         struct iscsi_cls_session *cls_session;
1223         struct bnx2i_hba *hba;
1224         struct bnx2i_endpoint *bnx2i_ep;
1225
1226         if (!ep) {
1227                 printk(KERN_ERR "bnx2i: missing ep.\n");
1228                 return NULL;
1229         }
1230
1231         bnx2i_ep = ep->dd_data;
1232         shost = bnx2i_ep->hba->shost;
1233         hba = iscsi_host_priv(shost);
1234         if (bnx2i_adapter_ready(hba))
1235                 return NULL;
1236
1237         /*
1238          * user can override hw limit as long as it is within
1239          * the min/max.
1240          */
1241         if (cmds_max > hba->max_sqes)
1242                 cmds_max = hba->max_sqes;
1243         else if (cmds_max < BNX2I_SQ_WQES_MIN)
1244                 cmds_max = BNX2I_SQ_WQES_MIN;
1245
1246         cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1247                                           cmds_max, 0, sizeof(struct bnx2i_cmd),
1248                                           initial_cmdsn, ISCSI_MAX_TARGET);
1249         if (!cls_session)
1250                 return NULL;
1251
1252         if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1253                 goto session_teardown;
1254         return cls_session;
1255
1256 session_teardown:
1257         iscsi_session_teardown(cls_session);
1258         return NULL;
1259 }
1260
1261
1262 /**
1263  * bnx2i_session_destroy - destroys iscsi session
1264  * @cls_session:        pointer to iscsi cls session
1265  *
1266  * Destroys previously created iSCSI session instance and releases
1267  *      all resources held by it
1268  */
1269 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1270 {
1271         struct iscsi_session *session = cls_session->dd_data;
1272         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1273         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1274
1275         bnx2i_destroy_cmd_pool(hba, session);
1276         iscsi_session_teardown(cls_session);
1277 }
1278
1279
1280 /**
1281  * bnx2i_conn_create - create iscsi connection instance
1282  * @cls_session:        pointer to iscsi cls session
1283  * @cid:                iscsi cid as per rfc (not NX2's CID terminology)
1284  *
1285  * Creates a new iSCSI connection instance for a given session
1286  */
1287 static struct iscsi_cls_conn *
1288 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1289 {
1290         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1291         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1292         struct bnx2i_conn *bnx2i_conn;
1293         struct iscsi_cls_conn *cls_conn;
1294         struct iscsi_conn *conn;
1295
1296         cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1297                                     cid);
1298         if (!cls_conn)
1299                 return NULL;
1300         conn = cls_conn->dd_data;
1301
1302         bnx2i_conn = conn->dd_data;
1303         bnx2i_conn->cls_conn = cls_conn;
1304         bnx2i_conn->hba = hba;
1305         /* 'ep' ptr will be assigned in bind() call */
1306         bnx2i_conn->ep = NULL;
1307         init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1308
1309         if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1310                 iscsi_conn_printk(KERN_ALERT, conn,
1311                                   "conn_new: login resc alloc failed!!\n");
1312                 goto free_conn;
1313         }
1314
1315         return cls_conn;
1316
1317 free_conn:
1318         iscsi_conn_teardown(cls_conn);
1319         return NULL;
1320 }
1321
1322 /**
1323  * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1324  * @cls_session:        pointer to iscsi cls session
1325  * @cls_conn:           pointer to iscsi cls conn
1326  * @transport_fd:       64-bit EP handle
1327  * @is_leading:         leading connection on this session?
1328  *
1329  * Binds together iSCSI session instance, iSCSI connection instance
1330  *      and the TCP connection. This routine returns error code if
1331  *      TCP connection does not belong on the device iSCSI sess/conn
1332  *      is bound
1333  */
1334 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1335                            struct iscsi_cls_conn *cls_conn,
1336                            uint64_t transport_fd, int is_leading)
1337 {
1338         struct iscsi_conn *conn = cls_conn->dd_data;
1339         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1340         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1341         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1342         struct bnx2i_endpoint *bnx2i_ep;
1343         struct iscsi_endpoint *ep;
1344         int ret_code;
1345
1346         ep = iscsi_lookup_endpoint(transport_fd);
1347         if (!ep)
1348                 return -EINVAL;
1349
1350         bnx2i_ep = ep->dd_data;
1351         if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1352             (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1353                 /* Peer disconnect via' FIN or RST */
1354                 return -EINVAL;
1355
1356         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1357                 return -EINVAL;
1358
1359         if (bnx2i_ep->hba != hba) {
1360                 /* Error - TCP connection does not belong to this device
1361                  */
1362                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1363                                   "conn bind, ep=0x%p (%s) does not",
1364                                   bnx2i_ep, bnx2i_ep->hba->netdev->name);
1365                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1366                                   "belong to hba (%s)\n",
1367                                   hba->netdev->name);
1368                 return -EEXIST;
1369         }
1370
1371         bnx2i_ep->conn = bnx2i_conn;
1372         bnx2i_conn->ep = bnx2i_ep;
1373         bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1374         bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1375
1376         ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1377                                                 bnx2i_ep->ep_iscsi_cid);
1378
1379         /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1380          * driver needs to explicitly replenish RQ index during setup.
1381          */
1382         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1383                 bnx2i_put_rq_buf(bnx2i_conn, 0);
1384
1385         bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1386         return ret_code;
1387 }
1388
1389
1390 /**
1391  * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1392  * @cls_conn:   pointer to iscsi cls conn
1393  *
1394  * Destroy an iSCSI connection instance and release memory resources held by
1395  *      this connection
1396  */
1397 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1398 {
1399         struct iscsi_conn *conn = cls_conn->dd_data;
1400         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1401         struct Scsi_Host *shost;
1402         struct bnx2i_hba *hba;
1403
1404         shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1405         hba = iscsi_host_priv(shost);
1406
1407         bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1408         iscsi_conn_teardown(cls_conn);
1409 }
1410
1411
1412 /**
1413  * bnx2i_conn_get_param - return iscsi connection parameter to caller
1414  * @cls_conn:   pointer to iscsi cls conn
1415  * @param:      parameter type identifier
1416  * @buf:        buffer pointer
1417  *
1418  * returns iSCSI connection parameters
1419  */
1420 static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn,
1421                                 enum iscsi_param param, char *buf)
1422 {
1423         struct iscsi_conn *conn = cls_conn->dd_data;
1424         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1425         int len = 0;
1426
1427         switch (param) {
1428         case ISCSI_PARAM_CONN_PORT:
1429                 if (bnx2i_conn->ep)
1430                         len = sprintf(buf, "%hu\n",
1431                                       bnx2i_conn->ep->cm_sk->dst_port);
1432                 break;
1433         case ISCSI_PARAM_CONN_ADDRESS:
1434                 if (bnx2i_conn->ep)
1435                         len = sprintf(buf, "%pI4\n",
1436                                       &bnx2i_conn->ep->cm_sk->dst_ip);
1437                 break;
1438         default:
1439                 return iscsi_conn_get_param(cls_conn, param, buf);
1440         }
1441
1442         return len;
1443 }
1444
1445 /**
1446  * bnx2i_host_get_param - returns host (adapter) related parameters
1447  * @shost:      scsi host pointer
1448  * @param:      parameter type identifier
1449  * @buf:        buffer pointer
1450  */
1451 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1452                                 enum iscsi_host_param param, char *buf)
1453 {
1454         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1455         int len = 0;
1456
1457         switch (param) {
1458         case ISCSI_HOST_PARAM_HWADDRESS:
1459                 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1460                 break;
1461         case ISCSI_HOST_PARAM_NETDEV_NAME:
1462                 len = sprintf(buf, "%s\n", hba->netdev->name);
1463                 break;
1464         default:
1465                 return iscsi_host_get_param(shost, param, buf);
1466         }
1467         return len;
1468 }
1469
1470 /**
1471  * bnx2i_conn_start - completes iscsi connection migration to FFP
1472  * @cls_conn:   pointer to iscsi cls conn
1473  *
1474  * last call in FFP migration to handover iscsi conn to the driver
1475  */
1476 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1477 {
1478         struct iscsi_conn *conn = cls_conn->dd_data;
1479         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1480
1481         bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1482         bnx2i_update_iscsi_conn(conn);
1483
1484         /*
1485          * this should normally not sleep for a long time so it should
1486          * not disrupt the caller.
1487          */
1488         bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1489         bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1490         bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1491         add_timer(&bnx2i_conn->ep->ofld_timer);
1492         /* update iSCSI context for this conn, wait for CNIC to complete */
1493         wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1494                         bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1495
1496         if (signal_pending(current))
1497                 flush_signals(current);
1498         del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1499
1500         iscsi_conn_start(cls_conn);
1501         return 0;
1502 }
1503
1504
1505 /**
1506  * bnx2i_conn_get_stats - returns iSCSI stats
1507  * @cls_conn:   pointer to iscsi cls conn
1508  * @stats:      pointer to iscsi statistic struct
1509  */
1510 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1511                                  struct iscsi_stats *stats)
1512 {
1513         struct iscsi_conn *conn = cls_conn->dd_data;
1514
1515         stats->txdata_octets = conn->txdata_octets;
1516         stats->rxdata_octets = conn->rxdata_octets;
1517         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1518         stats->dataout_pdus = conn->dataout_pdus_cnt;
1519         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1520         stats->datain_pdus = conn->datain_pdus_cnt;
1521         stats->r2t_pdus = conn->r2t_pdus_cnt;
1522         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1523         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1524         stats->custom_length = 3;
1525         strcpy(stats->custom[2].desc, "eh_abort_cnt");
1526         stats->custom[2].value = conn->eh_abort_cnt;
1527         stats->digest_err = 0;
1528         stats->timeout_err = 0;
1529         stats->custom_length = 0;
1530 }
1531
1532
1533 /**
1534  * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1535  * @dst_addr:   target IP address
1536  *
1537  * check if route resolves to BNX2 device
1538  */
1539 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1540 {
1541         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1542         struct bnx2i_hba *hba;
1543         struct cnic_dev *cnic = NULL;
1544
1545         bnx2i_reg_dev_all();
1546
1547         hba = get_adapter_list_head();
1548         if (hba && hba->cnic)
1549                 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1550         if (!cnic) {
1551                 printk(KERN_ALERT "bnx2i: no route,"
1552                        "can't connect using cnic\n");
1553                 goto no_nx2_route;
1554         }
1555         hba = bnx2i_find_hba_for_cnic(cnic);
1556         if (!hba)
1557                 goto no_nx2_route;
1558
1559         if (bnx2i_adapter_ready(hba)) {
1560                 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1561                 goto no_nx2_route;
1562         }
1563         if (hba->netdev->mtu > hba->mtu_supported) {
1564                 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1565                                   hba->netdev->name, hba->netdev->mtu);
1566                 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1567                                   hba->mtu_supported);
1568                 goto no_nx2_route;
1569         }
1570         return hba;
1571 no_nx2_route:
1572         return NULL;
1573 }
1574
1575
1576 /**
1577  * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1578  * @hba:        pointer to adapter instance
1579  * @ep:         endpoint (transport indentifier) structure
1580  *
1581  * destroys cm_sock structure and on chip iscsi context
1582  */
1583 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1584                                  struct bnx2i_endpoint *ep)
1585 {
1586         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
1587                 hba->cnic->cm_destroy(ep->cm_sk);
1588
1589         if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
1590                 ep->state = EP_STATE_DISCONN_COMPL;
1591
1592         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1593             ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1594                 printk(KERN_ALERT "bnx2i - ERROR - please submit GRC Dump,"
1595                                   " NW/PCIe trace, driver msgs to developers"
1596                                   " for analysis\n");
1597                 return 1;
1598         }
1599
1600         ep->state = EP_STATE_CLEANUP_START;
1601         init_timer(&ep->ofld_timer);
1602         ep->ofld_timer.expires = 10*HZ + jiffies;
1603         ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1604         ep->ofld_timer.data = (unsigned long) ep;
1605         add_timer(&ep->ofld_timer);
1606
1607         bnx2i_ep_destroy_list_add(hba, ep);
1608
1609         /* destroy iSCSI context, wait for it to complete */
1610         bnx2i_send_conn_destroy(hba, ep);
1611         wait_event_interruptible(ep->ofld_wait,
1612                                  (ep->state != EP_STATE_CLEANUP_START));
1613
1614         if (signal_pending(current))
1615                 flush_signals(current);
1616         del_timer_sync(&ep->ofld_timer);
1617
1618         bnx2i_ep_destroy_list_del(hba, ep);
1619
1620         if (ep->state != EP_STATE_CLEANUP_CMPL)
1621                 /* should never happen */
1622                 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1623
1624         return 0;
1625 }
1626
1627
1628 /**
1629  * bnx2i_ep_connect - establish TCP connection to target portal
1630  * @shost:              scsi host
1631  * @dst_addr:           target IP address
1632  * @non_blocking:       blocking or non-blocking call
1633  *
1634  * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1635  *      with l5_core and the CNIC. This is a multi-step process of resolving
1636  *      route to target, create a iscsi connection context, handshaking with
1637  *      CNIC module to create/initialize the socket struct and finally
1638  *      sending down option-2 request to complete TCP 3-way handshake
1639  */
1640 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1641                                                struct sockaddr *dst_addr,
1642                                                int non_blocking)
1643 {
1644         u32 iscsi_cid = BNX2I_CID_RESERVED;
1645         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1646         struct sockaddr_in6 *desti6;
1647         struct bnx2i_endpoint *bnx2i_ep;
1648         struct bnx2i_hba *hba;
1649         struct cnic_dev *cnic;
1650         struct cnic_sockaddr saddr;
1651         struct iscsi_endpoint *ep;
1652         int rc = 0;
1653
1654         if (shost) {
1655                 /* driver is given scsi host to work with */
1656                 hba = iscsi_host_priv(shost);
1657                 /* Register the device with cnic if not already done so */
1658                 bnx2i_register_device(hba);
1659         } else
1660                 /*
1661                  * check if the given destination can be reached through
1662                  * a iscsi capable NetXtreme2 device
1663                  */
1664                 hba = bnx2i_check_route(dst_addr);
1665
1666         if (!hba || test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state)) {
1667                 rc = -EINVAL;
1668                 goto check_busy;
1669         }
1670
1671         cnic = hba->cnic;
1672         ep = bnx2i_alloc_ep(hba);
1673         if (!ep) {
1674                 rc = -ENOMEM;
1675                 goto check_busy;
1676         }
1677         bnx2i_ep = ep->dd_data;
1678
1679         mutex_lock(&hba->net_dev_lock);
1680         if (bnx2i_adapter_ready(hba)) {
1681                 rc = -EPERM;
1682                 goto net_if_down;
1683         }
1684
1685         bnx2i_ep->num_active_cmds = 0;
1686         iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1687         if (iscsi_cid == -1) {
1688                 printk(KERN_ALERT "alloc_ep: unable to allocate iscsi cid\n");
1689                 rc = -ENOMEM;
1690                 goto iscsi_cid_err;
1691         }
1692         bnx2i_ep->hba_age = hba->age;
1693
1694         rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1695         if (rc != 0) {
1696                 printk(KERN_ALERT "bnx2i: ep_conn, alloc QP resc error\n");
1697                 rc = -ENOMEM;
1698                 goto qp_resc_err;
1699         }
1700
1701         bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1702         bnx2i_ep->state = EP_STATE_OFLD_START;
1703         bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1704
1705         init_timer(&bnx2i_ep->ofld_timer);
1706         bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1707         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1708         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1709         add_timer(&bnx2i_ep->ofld_timer);
1710
1711         bnx2i_send_conn_ofld_req(hba, bnx2i_ep);
1712
1713         /* Wait for CNIC hardware to setup conn context and return 'cid' */
1714         wait_event_interruptible(bnx2i_ep->ofld_wait,
1715                                  bnx2i_ep->state != EP_STATE_OFLD_START);
1716
1717         if (signal_pending(current))
1718                 flush_signals(current);
1719         del_timer_sync(&bnx2i_ep->ofld_timer);
1720
1721         bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1722
1723         if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1724                 rc = -ENOSPC;
1725                 goto conn_failed;
1726         }
1727
1728         rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1729                              iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1730         if (rc) {
1731                 rc = -EINVAL;
1732                 goto conn_failed;
1733         }
1734
1735         bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1736         bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1737         clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1738
1739         memset(&saddr, 0, sizeof(saddr));
1740         if (dst_addr->sa_family == AF_INET) {
1741                 desti = (struct sockaddr_in *) dst_addr;
1742                 saddr.remote.v4 = *desti;
1743                 saddr.local.v4.sin_family = desti->sin_family;
1744         } else if (dst_addr->sa_family == AF_INET6) {
1745                 desti6 = (struct sockaddr_in6 *) dst_addr;
1746                 saddr.remote.v6 = *desti6;
1747                 saddr.local.v6.sin6_family = desti6->sin6_family;
1748         }
1749
1750         bnx2i_ep->timestamp = jiffies;
1751         bnx2i_ep->state = EP_STATE_CONNECT_START;
1752         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1753                 rc = -EINVAL;
1754                 goto conn_failed;
1755         } else
1756                 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1757
1758         if (rc)
1759                 goto release_ep;
1760
1761         if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1762                 goto release_ep;
1763         mutex_unlock(&hba->net_dev_lock);
1764         return ep;
1765
1766 release_ep:
1767         if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1768                 mutex_unlock(&hba->net_dev_lock);
1769                 return ERR_PTR(rc);
1770         }
1771 conn_failed:
1772 net_if_down:
1773 iscsi_cid_err:
1774         bnx2i_free_qp_resc(hba, bnx2i_ep);
1775 qp_resc_err:
1776         bnx2i_free_ep(ep);
1777         mutex_unlock(&hba->net_dev_lock);
1778 check_busy:
1779         bnx2i_unreg_dev_all();
1780         return ERR_PTR(rc);
1781 }
1782
1783
1784 /**
1785  * bnx2i_ep_poll - polls for TCP connection establishement
1786  * @ep:                 TCP connection (endpoint) handle
1787  * @timeout_ms:         timeout value in milli secs
1788  *
1789  * polls for TCP connect request to complete
1790  */
1791 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1792 {
1793         struct bnx2i_endpoint *bnx2i_ep;
1794         int rc = 0;
1795
1796         bnx2i_ep = ep->dd_data;
1797         if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1798             (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1799             (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1800                 return -1;
1801         if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1802                 return 1;
1803
1804         rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1805                                               ((bnx2i_ep->state ==
1806                                                 EP_STATE_OFLD_FAILED) ||
1807                                                (bnx2i_ep->state ==
1808                                                 EP_STATE_CONNECT_FAILED) ||
1809                                                (bnx2i_ep->state ==
1810                                                 EP_STATE_CONNECT_COMPL)),
1811                                               msecs_to_jiffies(timeout_ms));
1812         if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
1813                 rc = -1;
1814
1815         if (rc > 0)
1816                 return 1;
1817         else if (!rc)
1818                 return 0;       /* timeout */
1819         else
1820                 return rc;
1821 }
1822
1823
1824 /**
1825  * bnx2i_ep_tcp_conn_active - check EP state transition
1826  * @ep:         endpoint pointer
1827  *
1828  * check if underlying TCP connection is active
1829  */
1830 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1831 {
1832         int ret;
1833         int cnic_dev_10g = 0;
1834
1835         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1836                 cnic_dev_10g = 1;
1837
1838         switch (bnx2i_ep->state) {
1839         case EP_STATE_CONNECT_START:
1840         case EP_STATE_CLEANUP_FAILED:
1841         case EP_STATE_OFLD_FAILED:
1842         case EP_STATE_DISCONN_TIMEDOUT:
1843                 ret = 0;
1844                 break;
1845         case EP_STATE_CONNECT_COMPL:
1846         case EP_STATE_ULP_UPDATE_START:
1847         case EP_STATE_ULP_UPDATE_COMPL:
1848         case EP_STATE_TCP_FIN_RCVD:
1849         case EP_STATE_ULP_UPDATE_FAILED:
1850                 ret = 1;
1851                 break;
1852         case EP_STATE_TCP_RST_RCVD:
1853                 ret = 0;
1854                 break;
1855         case EP_STATE_CONNECT_FAILED:
1856                 if (cnic_dev_10g)
1857                         ret = 1;
1858                 else
1859                         ret = 0;
1860                 break;
1861         default:
1862                 ret = 0;
1863         }
1864
1865         return ret;
1866 }
1867
1868
1869 /**
1870  * bnx2i_ep_disconnect - executes TCP connection teardown process
1871  * @ep:         TCP connection (endpoint) handle
1872  *
1873  * executes  TCP connection teardown process
1874  */
1875 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
1876 {
1877         struct bnx2i_endpoint *bnx2i_ep;
1878         struct bnx2i_conn *bnx2i_conn = NULL;
1879         struct iscsi_session *session = NULL;
1880         struct iscsi_conn *conn;
1881         struct cnic_dev *cnic;
1882         struct bnx2i_hba *hba;
1883
1884         bnx2i_ep = ep->dd_data;
1885
1886         /* driver should not attempt connection cleanup until TCP_CONNECT
1887          * completes either successfully or fails. Timeout is 9-secs, so
1888          * wait for it to complete
1889          */
1890         while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
1891                 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
1892                 msleep(250);
1893
1894         if (bnx2i_ep->conn) {
1895                 bnx2i_conn = bnx2i_ep->conn;
1896                 conn = bnx2i_conn->cls_conn->dd_data;
1897                 session = conn->session;
1898
1899                 iscsi_suspend_queue(conn);
1900         }
1901
1902         hba = bnx2i_ep->hba;
1903         if (bnx2i_ep->state == EP_STATE_IDLE)
1904                 goto return_bnx2i_ep;
1905         cnic = hba->cnic;
1906
1907         mutex_lock(&hba->net_dev_lock);
1908
1909         if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
1910                 goto free_resc;
1911         if (bnx2i_ep->hba_age != hba->age)
1912                 goto free_resc;
1913
1914         if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
1915                 goto destory_conn;
1916
1917         bnx2i_ep->state = EP_STATE_DISCONN_START;
1918
1919         init_timer(&bnx2i_ep->ofld_timer);
1920         bnx2i_ep->ofld_timer.expires = 10*HZ + jiffies;
1921         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1922         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1923         add_timer(&bnx2i_ep->ofld_timer);
1924
1925         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1926                 int close = 0;
1927
1928                 if (session) {
1929                         spin_lock_bh(&session->lock);
1930                         if (session->state == ISCSI_STATE_LOGGING_OUT)
1931                                 close = 1;
1932                         spin_unlock_bh(&session->lock);
1933                 }
1934                 if (close)
1935                         cnic->cm_close(bnx2i_ep->cm_sk);
1936                 else
1937                         cnic->cm_abort(bnx2i_ep->cm_sk);
1938         } else
1939                 goto free_resc;
1940
1941         /* wait for option-2 conn teardown */
1942         wait_event_interruptible(bnx2i_ep->ofld_wait,
1943                                  bnx2i_ep->state != EP_STATE_DISCONN_START);
1944
1945         if (signal_pending(current))
1946                 flush_signals(current);
1947         del_timer_sync(&bnx2i_ep->ofld_timer);
1948
1949 destory_conn:
1950         if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1951                 mutex_unlock(&hba->net_dev_lock);
1952                 return;
1953         }
1954 free_resc:
1955         mutex_unlock(&hba->net_dev_lock);
1956         bnx2i_free_qp_resc(hba, bnx2i_ep);
1957 return_bnx2i_ep:
1958         if (bnx2i_conn)
1959                 bnx2i_conn->ep = NULL;
1960
1961         bnx2i_free_ep(ep);
1962
1963         if (!hba->ofld_conns_active)
1964                 bnx2i_unreg_dev_all();
1965
1966         wake_up_interruptible(&hba->eh_wait);
1967 }
1968
1969
1970 /**
1971  * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
1972  * @buf:        pointer to buffer containing iscsi path message
1973  *
1974  */
1975 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
1976 {
1977         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1978         char *buf = (char *) params;
1979         u16 len = sizeof(*params);
1980
1981         /* handled by cnic driver */
1982         hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
1983                                      len);
1984
1985         return 0;
1986 }
1987
1988
1989 /*
1990  * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
1991  * used while registering with the scsi host and iSCSI transport module.
1992  */
1993 static struct scsi_host_template bnx2i_host_template = {
1994         .module                 = THIS_MODULE,
1995         .name                   = "Broadcom Offload iSCSI Initiator",
1996         .proc_name              = "bnx2i",
1997         .queuecommand           = iscsi_queuecommand,
1998         .eh_abort_handler       = iscsi_eh_abort,
1999         .eh_device_reset_handler = iscsi_eh_device_reset,
2000         .eh_target_reset_handler = iscsi_eh_recover_target,
2001         .change_queue_depth     = iscsi_change_queue_depth,
2002         .can_queue              = 1024,
2003         .max_sectors            = 127,
2004         .cmd_per_lun            = 32,
2005         .this_id                = -1,
2006         .use_clustering         = ENABLE_CLUSTERING,
2007         .sg_tablesize           = ISCSI_MAX_BDS_PER_CMD,
2008         .shost_attrs            = bnx2i_dev_attributes,
2009 };
2010
2011 struct iscsi_transport bnx2i_iscsi_transport = {
2012         .owner                  = THIS_MODULE,
2013         .name                   = "bnx2i",
2014         .caps                   = CAP_RECOVERY_L0 | CAP_HDRDGST |
2015                                   CAP_MULTI_R2T | CAP_DATADGST |
2016                                   CAP_DATA_PATH_OFFLOAD,
2017         .param_mask             = ISCSI_MAX_RECV_DLENGTH |
2018                                   ISCSI_MAX_XMIT_DLENGTH |
2019                                   ISCSI_HDRDGST_EN |
2020                                   ISCSI_DATADGST_EN |
2021                                   ISCSI_INITIAL_R2T_EN |
2022                                   ISCSI_MAX_R2T |
2023                                   ISCSI_IMM_DATA_EN |
2024                                   ISCSI_FIRST_BURST |
2025                                   ISCSI_MAX_BURST |
2026                                   ISCSI_PDU_INORDER_EN |
2027                                   ISCSI_DATASEQ_INORDER_EN |
2028                                   ISCSI_ERL |
2029                                   ISCSI_CONN_PORT |
2030                                   ISCSI_CONN_ADDRESS |
2031                                   ISCSI_EXP_STATSN |
2032                                   ISCSI_PERSISTENT_PORT |
2033                                   ISCSI_PERSISTENT_ADDRESS |
2034                                   ISCSI_TARGET_NAME | ISCSI_TPGT |
2035                                   ISCSI_USERNAME | ISCSI_PASSWORD |
2036                                   ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
2037                                   ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
2038                                   ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
2039                                   ISCSI_PING_TMO | ISCSI_RECV_TMO |
2040                                   ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
2041         .host_param_mask        = ISCSI_HOST_HWADDRESS | ISCSI_HOST_NETDEV_NAME,
2042         .create_session         = bnx2i_session_create,
2043         .destroy_session        = bnx2i_session_destroy,
2044         .create_conn            = bnx2i_conn_create,
2045         .bind_conn              = bnx2i_conn_bind,
2046         .destroy_conn           = bnx2i_conn_destroy,
2047         .set_param              = iscsi_set_param,
2048         .get_conn_param         = bnx2i_conn_get_param,
2049         .get_session_param      = iscsi_session_get_param,
2050         .get_host_param         = bnx2i_host_get_param,
2051         .start_conn             = bnx2i_conn_start,
2052         .stop_conn              = iscsi_conn_stop,
2053         .send_pdu               = iscsi_conn_send_pdu,
2054         .xmit_task              = bnx2i_task_xmit,
2055         .get_stats              = bnx2i_conn_get_stats,
2056         /* TCP connect - disconnect - option-2 interface calls */
2057         .ep_connect             = bnx2i_ep_connect,
2058         .ep_poll                = bnx2i_ep_poll,
2059         .ep_disconnect          = bnx2i_ep_disconnect,
2060         .set_path               = bnx2i_nl_set_path,
2061         /* Error recovery timeout call */
2062         .session_recovery_timedout = iscsi_session_recovery_timedout,
2063         .cleanup_task           = bnx2i_cleanup_task,
2064 };