drivers/scsi/bnx2fc/bnx2fc_tgt.c

   1 /* bnx2fc_tgt.c: Broadcom NetXtreme II Linux FCoE offload driver.
   2  * Handles operations such as session offload/upload etc, and manages
   3  * session resources such as connection id and qp resources.
   4  *
   5  * Copyright (c) 2008 - 2010 Broadcom Corporation
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation.
  10  *
  11  * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
  12  */
  13
  14 #include "bnx2fc.h"
  15 static void bnx2fc_upld_timer(unsigned long data);
  16 static void bnx2fc_ofld_timer(unsigned long data);
  17 static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
  18                            struct fcoe_port *port,
  19                            struct fc_rport_priv *rdata);
  20 static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
  21                                 struct bnx2fc_rport *tgt);
  22 static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
  23                               struct bnx2fc_rport *tgt);
  24 static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
  25                               struct bnx2fc_rport *tgt);
  26 static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id);
  27
  28 static void bnx2fc_upld_timer(unsigned long data)
  29 {
  30
  31         struct bnx2fc_rport *tgt = (struct bnx2fc_rport *)data;
  32
  33         BNX2FC_TGT_DBG(tgt, "upld_timer - Upload compl not received!!\n");
  34         /* fake upload completion */
  35         clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
  36         set_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
  37         wake_up_interruptible(&tgt->upld_wait);
  38 }
  39
  40 static void bnx2fc_ofld_timer(unsigned long data)
  41 {
  42
  43         struct bnx2fc_rport *tgt = (struct bnx2fc_rport *)data;
  44
  45         BNX2FC_TGT_DBG(tgt, "entered bnx2fc_ofld_timer\n");
  46         /* NOTE: This function should never be called, as
  47          * offload should never timeout
  48          */
  49         /*
  50          * If the timer has expired, this session is dead
  51          * Clear offloaded flag and logout of this device.
  52          * Since OFFLOADED flag is cleared, this case
  53          * will be considered as offload error and the
  54          * port will be logged off, and conn_id, session
  55          * resources are freed up in bnx2fc_offload_session
  56          */
  57         clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
  58         set_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
  59         wake_up_interruptible(&tgt->ofld_wait);
  60 }
  61
  62 static void bnx2fc_offload_session(struct fcoe_port *port,
  63                                         struct bnx2fc_rport *tgt,
  64                                         struct fc_rport_priv *rdata)
  65 {
  66         struct fc_lport *lport = rdata->local_port;
  67         struct fc_rport *rport = rdata->rport;
  68         struct bnx2fc_hba *hba = port->priv;
  69         int rval;
  70         int i = 0;
  71
  72         /* Initialize bnx2fc_rport */
  73         /* NOTE: tgt is already bzero'd */
  74         rval = bnx2fc_init_tgt(tgt, port, rdata);
  75         if (rval) {
  76                 printk(KERN_ERR PFX "Failed to allocate conn id for "
  77                         "port_id (%6x)\n", rport->port_id);
  78                 goto ofld_err;
  79         }
  80
  81         /* Allocate session resources */
  82         rval = bnx2fc_alloc_session_resc(hba, tgt);
  83         if (rval) {
  84                 printk(KERN_ERR PFX "Failed to allocate resources\n");
  85                 goto ofld_err;
  86         }
  87
  88         /*
  89          * Initialize FCoE session offload process.
  90          * Upon completion of offload process add
  91          * rport to list of rports
  92          */
  93 retry_ofld:
  94         clear_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
  95         rval = bnx2fc_send_session_ofld_req(port, tgt);
  96         if (rval) {
  97                 printk(KERN_ERR PFX "ofld_req failed\n");
  98                 goto ofld_err;
  99         }
 100
 101         /*
 102          * wait for the session is offloaded and enabled. 3 Secs
 103          * should be ample time for this process to complete.
 104          */
 105         setup_timer(&tgt->ofld_timer, bnx2fc_ofld_timer, (unsigned long)tgt);
 106         mod_timer(&tgt->ofld_timer, jiffies + BNX2FC_FW_TIMEOUT);
 107
 108         wait_event_interruptible(tgt->ofld_wait,
 109                                  (test_bit(
 110                                   BNX2FC_FLAG_OFLD_REQ_CMPL,
 111                                   &tgt->flags)));
 112         if (signal_pending(current))
 113                 flush_signals(current);
 114
 115         del_timer_sync(&tgt->ofld_timer);
 116
 117         if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
 118                 if (test_and_clear_bit(BNX2FC_FLAG_CTX_ALLOC_FAILURE,
 119                                        &tgt->flags)) {
 120                         BNX2FC_TGT_DBG(tgt, "ctx_alloc_failure, "
 121                                 "retry ofld..%d\n", i++);
 122                         msleep_interruptible(1000);
 123                         if (i > 3) {
 124                                 i = 0;
 125                                 goto ofld_err;
 126                         }
 127                         goto retry_ofld;
 128                 }
 129                 goto ofld_err;
 130         }
 131         if (bnx2fc_map_doorbell(tgt)) {
 132                 printk(KERN_ERR PFX "map doorbell failed - no mem\n");
 133                 /* upload will take care of cleaning up sess resc */
 134                 lport->tt.rport_logoff(rdata);
 135         }
 136         return;
 137
 138 ofld_err:
 139         /* couldn't offload the session. log off from this rport */
 140         BNX2FC_TGT_DBG(tgt, "bnx2fc_offload_session - offload error\n");
 141         lport->tt.rport_logoff(rdata);
 142         /* Free session resources */
 143         bnx2fc_free_session_resc(hba, tgt);
 144         if (tgt->fcoe_conn_id != -1)
 145                 bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
 146 }
 147
 148 void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
 149 {
 150         struct bnx2fc_cmd *io_req;
 151         struct list_head *list;
 152         struct list_head *tmp;
 153         int rc;
 154         int i = 0;
 155         BNX2FC_TGT_DBG(tgt, "Entered flush_active_ios - %d\n",
 156                        tgt->num_active_ios.counter);
 157
 158         spin_lock_bh(&tgt->tgt_lock);
 159         tgt->flush_in_prog = 1;
 160
 161         list_for_each_safe(list, tmp, &tgt->active_cmd_queue) {
 162                 i++;
 163                 io_req = (struct bnx2fc_cmd *)list;
 164                 list_del_init(&io_req->link);
 165                 io_req->on_active_queue = 0;
 166                 BNX2FC_IO_DBG(io_req, "cmd_queue cleanup\n");
 167
 168                 if (cancel_delayed_work(&io_req->timeout_work)) {
 169                         if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
 170                                                 &io_req->req_flags)) {
 171                                 /* Handle eh_abort timeout */
 172                                 BNX2FC_IO_DBG(io_req, "eh_abort for IO "
 173                                               "cleaned up\n");
 174                                 complete(&io_req->tm_done);
 175                         }
 176                         kref_put(&io_req->refcount,
 177                                  bnx2fc_cmd_release); /* drop timer hold */
 178                 }
 179
 180                 set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags);
 181                 set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
 182                 rc = bnx2fc_initiate_cleanup(io_req);
 183                 BUG_ON(rc);
 184         }
 185
 186         list_for_each_safe(list, tmp, &tgt->els_queue) {
 187                 i++;
 188                 io_req = (struct bnx2fc_cmd *)list;
 189                 list_del_init(&io_req->link);
 190                 io_req->on_active_queue = 0;
 191
 192                 BNX2FC_IO_DBG(io_req, "els_queue cleanup\n");
 193
 194                 if (cancel_delayed_work(&io_req->timeout_work))
 195                         kref_put(&io_req->refcount,
 196                                  bnx2fc_cmd_release); /* drop timer hold */
 197
 198                 if ((io_req->cb_func) && (io_req->cb_arg)) {
 199                         io_req->cb_func(io_req->cb_arg);
 200                         io_req->cb_arg = NULL;
 201                 }
 202
 203                 rc = bnx2fc_initiate_cleanup(io_req);
 204                 BUG_ON(rc);
 205         }
 206
 207         list_for_each_safe(list, tmp, &tgt->io_retire_queue) {
 208                 i++;
 209                 io_req = (struct bnx2fc_cmd *)list;
 210                 list_del_init(&io_req->link);
 211
 212                 BNX2FC_IO_DBG(io_req, "retire_queue flush\n");
 213
 214                 if (cancel_delayed_work(&io_req->timeout_work))
 215                         kref_put(&io_req->refcount, bnx2fc_cmd_release);
 216
 217                 clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
 218         }
 219
 220         BNX2FC_TGT_DBG(tgt, "IOs flushed = %d\n", i);
 221         i = 0;
 222         spin_unlock_bh(&tgt->tgt_lock);
 223         /* wait for active_ios to go to 0 */
 224         while ((tgt->num_active_ios.counter != 0) && (i++ < BNX2FC_WAIT_CNT))
 225                 msleep(25);
 226         if (tgt->num_active_ios.counter != 0)
 227                 printk(KERN_ERR PFX "CLEANUP on port 0x%x:"
 228                                     " active_ios = %d\n",
 229                         tgt->rdata->ids.port_id, tgt->num_active_ios.counter);
 230         spin_lock_bh(&tgt->tgt_lock);
 231         tgt->flush_in_prog = 0;
 232         spin_unlock_bh(&tgt->tgt_lock);
 233 }
 234
 235 static void bnx2fc_upload_session(struct fcoe_port *port,
 236                                         struct bnx2fc_rport *tgt)
 237 {
 238         struct bnx2fc_hba *hba = port->priv;
 239
 240         BNX2FC_TGT_DBG(tgt, "upload_session: active_ios = %d\n",
 241                 tgt->num_active_ios.counter);
 242
 243         /*
 244          * Called with hba->hba_mutex held.
 245          * This is a blocking call
 246          */
 247         clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
 248         bnx2fc_send_session_disable_req(port, tgt);
 249
 250         /*
 251          * wait for upload to complete. 3 Secs
 252          * should be sufficient time for this process to complete.
 253          */
 254         setup_timer(&tgt->upld_timer, bnx2fc_upld_timer, (unsigned long)tgt);
 255         mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
 256
 257         BNX2FC_TGT_DBG(tgt, "waiting for disable compl\n");
 258         wait_event_interruptible(tgt->upld_wait,
 259                                  (test_bit(
 260                                   BNX2FC_FLAG_UPLD_REQ_COMPL,
 261                                   &tgt->flags)));
 262
 263         if (signal_pending(current))
 264                 flush_signals(current);
 265
 266         del_timer_sync(&tgt->upld_timer);
 267
 268         /*
 269          * traverse thru the active_q and tmf_q and cleanup
 270          * IOs in these lists
 271          */
 272         BNX2FC_TGT_DBG(tgt, "flush/upload - disable wait flags = 0x%lx\n",
 273                        tgt->flags);
 274         bnx2fc_flush_active_ios(tgt);
 275
 276         /* Issue destroy KWQE */
 277         if (test_bit(BNX2FC_FLAG_DISABLED, &tgt->flags)) {
 278                 BNX2FC_TGT_DBG(tgt, "send destroy req\n");
 279                 clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
 280                 bnx2fc_send_session_destroy_req(hba, tgt);
 281
 282                 /* wait for destroy to complete */
 283                 setup_timer(&tgt->upld_timer,
 284                             bnx2fc_upld_timer, (unsigned long)tgt);
 285                 mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
 286
 287                 wait_event_interruptible(tgt->upld_wait,
 288                                          (test_bit(
 289                                           BNX2FC_FLAG_UPLD_REQ_COMPL,
 290                                           &tgt->flags)));
 291
 292                 if (!(test_bit(BNX2FC_FLAG_DESTROYED, &tgt->flags)))
 293                         printk(KERN_ERR PFX "ERROR!! destroy timed out\n");
 294
 295                 BNX2FC_TGT_DBG(tgt, "destroy wait complete flags = 0x%lx\n",
 296                         tgt->flags);
 297                 if (signal_pending(current))
 298                         flush_signals(current);
 299
 300                 del_timer_sync(&tgt->upld_timer);
 301
 302         } else
 303                 printk(KERN_ERR PFX "ERROR!! DISABLE req timed out, destroy"
 304                                 " not sent to FW\n");
 305
 306         /* Free session resources */
 307         bnx2fc_free_session_resc(hba, tgt);
 308         bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
 309 }
 310
 311 static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
 312                            struct fcoe_port *port,
 313                            struct fc_rport_priv *rdata)
 314 {
 315
 316         struct fc_rport *rport = rdata->rport;
 317         struct bnx2fc_hba *hba = port->priv;
 318
 319         tgt->rport = rport;
 320         tgt->rdata = rdata;
 321         tgt->port = port;
 322
 323         if (hba->num_ofld_sess >= BNX2FC_NUM_MAX_SESS) {
 324                 BNX2FC_TGT_DBG(tgt, "exceeded max sessions. logoff this tgt\n");
 325                 tgt->fcoe_conn_id = -1;
 326                 return -1;
 327         }
 328
 329         tgt->fcoe_conn_id = bnx2fc_alloc_conn_id(hba, tgt);
 330         if (tgt->fcoe_conn_id == -1)
 331                 return -1;
 332
 333         BNX2FC_TGT_DBG(tgt, "init_tgt - conn_id = 0x%x\n", tgt->fcoe_conn_id);
 334
 335         tgt->max_sqes = BNX2FC_SQ_WQES_MAX;
 336         tgt->max_rqes = BNX2FC_RQ_WQES_MAX;
 337         tgt->max_cqes = BNX2FC_CQ_WQES_MAX;
 338
 339         /* Initialize the toggle bit */
 340         tgt->sq_curr_toggle_bit = 1;
 341         tgt->cq_curr_toggle_bit = 1;
 342         tgt->sq_prod_idx = 0;
 343         tgt->cq_cons_idx = 0;
 344         tgt->rq_prod_idx = 0x8000;
 345         tgt->rq_cons_idx = 0;
 346         atomic_set(&tgt->num_active_ios, 0);
 347
 348         tgt->work_time_slice = 2;
 349
 350         spin_lock_init(&tgt->tgt_lock);
 351         spin_lock_init(&tgt->cq_lock);
 352
 353         /* Initialize active_cmd_queue list */
 354         INIT_LIST_HEAD(&tgt->active_cmd_queue);
 355
 356         /* Initialize IO retire queue */
 357         INIT_LIST_HEAD(&tgt->io_retire_queue);
 358
 359         INIT_LIST_HEAD(&tgt->els_queue);
 360
 361         /* Initialize active_tm_queue list */
 362         INIT_LIST_HEAD(&tgt->active_tm_queue);
 363
 364         init_waitqueue_head(&tgt->ofld_wait);
 365         init_waitqueue_head(&tgt->upld_wait);
 366
 367         return 0;
 368 }
 369
 370 /**
 371  * This event_callback is called after successful completion of libfc
 372  * initiated target login. bnx2fc can proceed with initiating the session
 373  * establishment.
 374  */
 375 void bnx2fc_rport_event_handler(struct fc_lport *lport,
 376                                 struct fc_rport_priv *rdata,
 377                                 enum fc_rport_event event)
 378 {
 379         struct fcoe_port *port = lport_priv(lport);
 380         struct bnx2fc_hba *hba = port->priv;
 381         struct fc_rport *rport = rdata->rport;
 382         struct fc_rport_libfc_priv *rp;
 383         struct bnx2fc_rport *tgt;
 384         u32 port_id;
 385
 386         BNX2FC_HBA_DBG(lport, "rport_event_hdlr: event = %d, port_id = 0x%x\n",
 387                 event, rdata->ids.port_id);
 388         switch (event) {
 389         case RPORT_EV_READY:
 390                 if (!rport) {
 391                         printk(KERN_ALERT PFX "rport is NULL: ERROR!\n");
 392                         break;
 393                 }
 394
 395                 rp = rport->dd_data;
 396                 if (rport->port_id == FC_FID_DIR_SERV) {
 397                         /*
 398                          * bnx2fc_rport structure doesn't exist for
 399                          * directory server.
 400                          * We should not come here, as lport will
 401                          * take care of fabric login
 402                          */
 403                         printk(KERN_ALERT PFX "%x - rport_event_handler ERROR\n",
 404                                 rdata->ids.port_id);
 405                         break;
 406                 }
 407
 408                 if (rdata->spp_type != FC_TYPE_FCP) {
 409                         BNX2FC_HBA_DBG(lport, "not FCP type target."
 410                                    " not offloading\n");
 411                         break;
 412                 }
 413                 if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
 414                         BNX2FC_HBA_DBG(lport, "not FCP_TARGET"
 415                                    " not offloading\n");
 416                         break;
 417                 }
 418
 419                 /*
 420                  * Offlaod process is protected with hba mutex.
 421                  * Use the same mutex_lock for upload process too
 422                  */
 423                 mutex_lock(&hba->hba_mutex);
 424                 tgt = (struct bnx2fc_rport *)&rp[1];
 425
 426                 /* This can happen when ADISC finds the same target */
 427                 if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
 428                         BNX2FC_TGT_DBG(tgt, "already offloaded\n");
 429                         mutex_unlock(&hba->hba_mutex);
 430                         return;
 431                 }
 432
 433                 /*
 434                  * Offload the session. This is a blocking call, and will
 435                  * wait until the session is offloaded.
 436                  */
 437                 bnx2fc_offload_session(port, tgt, rdata);
 438
 439                 BNX2FC_TGT_DBG(tgt, "OFFLOAD num_ofld_sess = %d\n",
 440                         hba->num_ofld_sess);
 441
 442                 if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
 443                         /*
 444                          * Session is offloaded and enabled. Map
 445                          * doorbell register for this target
 446                          */
 447                         BNX2FC_TGT_DBG(tgt, "sess offloaded\n");
 448                         /* This counter is protected with hba mutex */
 449                         hba->num_ofld_sess++;
 450
 451                         set_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
 452                 } else {
 453                         /*
 454                          * Offload or enable would have failed.
 455                          * In offload/enable completion path, the
 456                          * rport would have already been removed
 457                          */
 458                         BNX2FC_TGT_DBG(tgt, "Port is being logged off as "
 459                                    "offloaded flag not set\n");
 460                 }
 461                 mutex_unlock(&hba->hba_mutex);
 462                 break;
 463         case RPORT_EV_LOGO:
 464         case RPORT_EV_FAILED:
 465         case RPORT_EV_STOP:
 466                 port_id = rdata->ids.port_id;
 467                 if (port_id == FC_FID_DIR_SERV)
 468                         break;
 469
 470                 if (!rport) {
 471                         printk(KERN_ALERT PFX "%x - rport not created Yet!!\n",
 472                                 port_id);
 473                         break;
 474                 }
 475                 rp = rport->dd_data;
 476                 mutex_lock(&hba->hba_mutex);
 477                 /*
 478                  * Perform session upload. Note that rdata->peers is already
 479                  * removed from disc->rports list before we get this event.
 480                  */
 481                 tgt = (struct bnx2fc_rport *)&rp[1];
 482
 483                 if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
 484                         mutex_unlock(&hba->hba_mutex);
 485                         break;
 486                 }
 487                 clear_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
 488
 489                 bnx2fc_upload_session(port, tgt);
 490                 hba->num_ofld_sess--;
 491                 BNX2FC_TGT_DBG(tgt, "UPLOAD num_ofld_sess = %d\n",
 492                         hba->num_ofld_sess);
 493                 /*
 494                  * Try to wake up the linkdown wait thread. If num_ofld_sess
 495                  * is 0, the waiting therad wakes up
 496                  */
 497                 if ((hba->wait_for_link_down) &&
 498                     (hba->num_ofld_sess == 0)) {
 499                         wake_up_interruptible(&hba->shutdown_wait);
 500                 }
 501                 if (test_bit(BNX2FC_FLAG_EXPL_LOGO, &tgt->flags)) {
 502                         printk(KERN_ERR PFX "Relogin to the tgt\n");
 503                         mutex_lock(&lport->disc.disc_mutex);
 504                         lport->tt.rport_login(rdata);
 505                         mutex_unlock(&lport->disc.disc_mutex);
 506                 }
 507                 mutex_unlock(&hba->hba_mutex);
 508
 509                 break;
 510
 511         case RPORT_EV_NONE:
 512                 break;
 513         }
 514 }
 515
 516 /**
 517  * bnx2fc_tgt_lookup() - Lookup a bnx2fc_rport by port_id
 518  *
 519  * @port:  fcoe_port struct to lookup the target port on
 520  * @port_id: The remote port ID to look up
 521  */
 522 struct bnx2fc_rport *bnx2fc_tgt_lookup(struct fcoe_port *port,
 523                                              u32 port_id)
 524 {
 525         struct bnx2fc_hba *hba = port->priv;
 526         struct bnx2fc_rport *tgt;
 527         struct fc_rport_priv *rdata;
 528         int i;
 529
 530         for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
 531                 tgt = hba->tgt_ofld_list[i];
 532                 if ((tgt) && (tgt->port == port)) {
 533                         rdata = tgt->rdata;
 534                         if (rdata->ids.port_id == port_id) {
 535                                 if (rdata->rp_state != RPORT_ST_DELETE) {
 536                                         BNX2FC_TGT_DBG(tgt, "rport "
 537                                                 "obtained\n");
 538                                         return tgt;
 539                                 } else {
 540                                         printk(KERN_ERR PFX "rport 0x%x "
 541                                                 "is in DELETED state\n",
 542                                                 rdata->ids.port_id);
 543                                         return NULL;
 544                                 }
 545                         }
 546                 }
 547         }
 548         return NULL;
 549 }
 550
 551
 552 /**
 553  * bnx2fc_alloc_conn_id - allocates FCOE Connection id
 554  *
 555  * @hba:        pointer to adapter structure
 556  * @tgt:        pointer to bnx2fc_rport structure
 557  */
 558 static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
 559                                 struct bnx2fc_rport *tgt)
 560 {
 561         u32 conn_id, next;
 562
 563         /* called with hba mutex held */
 564
 565         /*
 566          * tgt_ofld_list access is synchronized using
 567          * both hba mutex and hba lock. Atleast hba mutex or
 568          * hba lock needs to be held for read access.
 569          */
 570
 571         spin_lock_bh(&hba->hba_lock);
 572         next = hba->next_conn_id;
 573         conn_id = hba->next_conn_id++;
 574         if (hba->next_conn_id == BNX2FC_NUM_MAX_SESS)
 575                 hba->next_conn_id = 0;
 576
 577         while (hba->tgt_ofld_list[conn_id] != NULL) {
 578                 conn_id++;
 579                 if (conn_id == BNX2FC_NUM_MAX_SESS)
 580                         conn_id = 0;
 581
 582                 if (conn_id == next) {
 583                         /* No free conn_ids are available */
 584                         spin_unlock_bh(&hba->hba_lock);
 585                         return -1;
 586                 }
 587         }
 588         hba->tgt_ofld_list[conn_id] = tgt;
 589         tgt->fcoe_conn_id = conn_id;
 590         spin_unlock_bh(&hba->hba_lock);
 591         return conn_id;
 592 }
 593
 594 static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id)
 595 {
 596         /* called with hba mutex held */
 597         spin_lock_bh(&hba->hba_lock);
 598         hba->tgt_ofld_list[conn_id] = NULL;
 599         hba->next_conn_id = conn_id;
 600         spin_unlock_bh(&hba->hba_lock);
 601 }
 602
 603 /**
 604  *bnx2fc_alloc_session_resc - Allocate qp resources for the session
 605  *
 606  */
 607 static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
 608                                         struct bnx2fc_rport *tgt)
 609 {
 610         dma_addr_t page;
 611         int num_pages;
 612         u32 *pbl;
 613
 614         /* Allocate and map SQ */
 615         tgt->sq_mem_size = tgt->max_sqes * BNX2FC_SQ_WQE_SIZE;
 616         tgt->sq_mem_size = (tgt->sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 617
 618         tgt->sq = dma_alloc_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
 619                                      &tgt->sq_dma, GFP_KERNEL);
 620         if (!tgt->sq) {
 621                 printk(KERN_ALERT PFX "unable to allocate SQ memory %d\n",
 622                         tgt->sq_mem_size);
 623                 goto mem_alloc_failure;
 624         }
 625         memset(tgt->sq, 0, tgt->sq_mem_size);
 626
 627         /* Allocate and map CQ */
 628         tgt->cq_mem_size = tgt->max_cqes * BNX2FC_CQ_WQE_SIZE;
 629         tgt->cq_mem_size = (tgt->cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 630
 631         tgt->cq = dma_alloc_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
 632                                      &tgt->cq_dma, GFP_KERNEL);
 633         if (!tgt->cq) {
 634                 printk(KERN_ALERT PFX "unable to allocate CQ memory %d\n",
 635                         tgt->cq_mem_size);
 636                 goto mem_alloc_failure;
 637         }
 638         memset(tgt->cq, 0, tgt->cq_mem_size);
 639
 640         /* Allocate and map RQ and RQ PBL */
 641         tgt->rq_mem_size = tgt->max_rqes * BNX2FC_RQ_WQE_SIZE;
 642         tgt->rq_mem_size = (tgt->rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 643
 644         tgt->rq = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
 645                                         &tgt->rq_dma, GFP_KERNEL);
 646         if (!tgt->rq) {
 647                 printk(KERN_ALERT PFX "unable to allocate RQ memory %d\n",
 648                         tgt->rq_mem_size);
 649                 goto mem_alloc_failure;
 650         }
 651         memset(tgt->rq, 0, tgt->rq_mem_size);
 652
 653         tgt->rq_pbl_size = (tgt->rq_mem_size / PAGE_SIZE) * sizeof(void *);
 654         tgt->rq_pbl_size = (tgt->rq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 655
 656         tgt->rq_pbl = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
 657                                          &tgt->rq_pbl_dma, GFP_KERNEL);
 658         if (!tgt->rq_pbl) {
 659                 printk(KERN_ALERT PFX "unable to allocate RQ PBL %d\n",
 660                         tgt->rq_pbl_size);
 661                 goto mem_alloc_failure;
 662         }
 663
 664         memset(tgt->rq_pbl, 0, tgt->rq_pbl_size);
 665         num_pages = tgt->rq_mem_size / PAGE_SIZE;
 666         page = tgt->rq_dma;
 667         pbl = (u32 *)tgt->rq_pbl;
 668
 669         while (num_pages--) {
 670                 *pbl = (u32)page;
 671                 pbl++;
 672                 *pbl = (u32)((u64)page >> 32);
 673                 pbl++;
 674                 page += PAGE_SIZE;
 675         }
 676
 677         /* Allocate and map XFERQ */
 678         tgt->xferq_mem_size = tgt->max_sqes * BNX2FC_XFERQ_WQE_SIZE;
 679         tgt->xferq_mem_size = (tgt->xferq_mem_size + (PAGE_SIZE - 1)) &
 680                                PAGE_MASK;
 681
 682         tgt->xferq = dma_alloc_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
 683                                         &tgt->xferq_dma, GFP_KERNEL);
 684         if (!tgt->xferq) {
 685                 printk(KERN_ALERT PFX "unable to allocate XFERQ %d\n",
 686                         tgt->xferq_mem_size);
 687                 goto mem_alloc_failure;
 688         }
 689         memset(tgt->xferq, 0, tgt->xferq_mem_size);
 690
 691         /* Allocate and map CONFQ & CONFQ PBL */
 692         tgt->confq_mem_size = tgt->max_sqes * BNX2FC_CONFQ_WQE_SIZE;
 693         tgt->confq_mem_size = (tgt->confq_mem_size + (PAGE_SIZE - 1)) &
 694                                PAGE_MASK;
 695
 696         tgt->confq = dma_alloc_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
 697                                         &tgt->confq_dma, GFP_KERNEL);
 698         if (!tgt->confq) {
 699                 printk(KERN_ALERT PFX "unable to allocate CONFQ %d\n",
 700                         tgt->confq_mem_size);
 701                 goto mem_alloc_failure;
 702         }
 703         memset(tgt->confq, 0, tgt->confq_mem_size);
 704
 705         tgt->confq_pbl_size =
 706                 (tgt->confq_mem_size / PAGE_SIZE) * sizeof(void *);
 707         tgt->confq_pbl_size =
 708                 (tgt->confq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 709
 710         tgt->confq_pbl = dma_alloc_coherent(&hba->pcidev->dev,
 711                                             tgt->confq_pbl_size,
 712                                             &tgt->confq_pbl_dma, GFP_KERNEL);
 713         if (!tgt->confq_pbl) {
 714                 printk(KERN_ALERT PFX "unable to allocate CONFQ PBL %d\n",
 715                         tgt->confq_pbl_size);
 716                 goto mem_alloc_failure;
 717         }
 718
 719         memset(tgt->confq_pbl, 0, tgt->confq_pbl_size);
 720         num_pages = tgt->confq_mem_size / PAGE_SIZE;
 721         page = tgt->confq_dma;
 722         pbl = (u32 *)tgt->confq_pbl;
 723
 724         while (num_pages--) {
 725                 *pbl = (u32)page;
 726                 pbl++;
 727                 *pbl = (u32)((u64)page >> 32);
 728                 pbl++;
 729                 page += PAGE_SIZE;
 730         }
 731
 732         /* Allocate and map ConnDB */
 733         tgt->conn_db_mem_size = sizeof(struct fcoe_conn_db);
 734
 735         tgt->conn_db = dma_alloc_coherent(&hba->pcidev->dev,
 736                                           tgt->conn_db_mem_size,
 737                                           &tgt->conn_db_dma, GFP_KERNEL);
 738         if (!tgt->conn_db) {
 739                 printk(KERN_ALERT PFX "unable to allocate conn_db %d\n",
 740                                                 tgt->conn_db_mem_size);
 741                 goto mem_alloc_failure;
 742         }
 743         memset(tgt->conn_db, 0, tgt->conn_db_mem_size);
 744
 745
 746         /* Allocate and map LCQ */
 747         tgt->lcq_mem_size = (tgt->max_sqes + 8) * BNX2FC_SQ_WQE_SIZE;
 748         tgt->lcq_mem_size = (tgt->lcq_mem_size + (PAGE_SIZE - 1)) &
 749                              PAGE_MASK;
 750
 751         tgt->lcq = dma_alloc_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
 752                                       &tgt->lcq_dma, GFP_KERNEL);
 753
 754         if (!tgt->lcq) {
 755                 printk(KERN_ALERT PFX "unable to allocate lcq %d\n",
 756                        tgt->lcq_mem_size);
 757                 goto mem_alloc_failure;
 758         }
 759         memset(tgt->lcq, 0, tgt->lcq_mem_size);
 760
 761         /* Arm CQ */
 762         tgt->conn_db->cq_arm.lo = -1;
 763         tgt->conn_db->rq_prod = 0x8000;
 764
 765         return 0;
 766
 767 mem_alloc_failure:
 768         bnx2fc_free_session_resc(hba, tgt);
 769         bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
 770         return -ENOMEM;
 771 }
 772
 773 /**
 774  * bnx2i_free_session_resc - free qp resources for the session
 775  *
 776  * @hba:        adapter structure pointer
 777  * @tgt:        bnx2fc_rport structure pointer
 778  *
 779  * Free QP resources - SQ/RQ/CQ/XFERQ memory and PBL
 780  */
 781 static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
 782                                                 struct bnx2fc_rport *tgt)
 783 {
 784         BNX2FC_TGT_DBG(tgt, "Freeing up session resources\n");
 785
 786         if (tgt->ctx_base) {
 787                 iounmap(tgt->ctx_base);
 788                 tgt->ctx_base = NULL;
 789         }
 790         /* Free LCQ */
 791         if (tgt->lcq) {
 792                 dma_free_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
 793                                     tgt->lcq, tgt->lcq_dma);
 794                 tgt->lcq = NULL;
 795         }
 796         /* Free connDB */
 797         if (tgt->conn_db) {
 798                 dma_free_coherent(&hba->pcidev->dev, tgt->conn_db_mem_size,
 799                                     tgt->conn_db, tgt->conn_db_dma);
 800                 tgt->conn_db = NULL;
 801         }
 802         /* Free confq  and confq pbl */
 803         if (tgt->confq_pbl) {
 804                 dma_free_coherent(&hba->pcidev->dev, tgt->confq_pbl_size,
 805                                     tgt->confq_pbl, tgt->confq_pbl_dma);
 806                 tgt->confq_pbl = NULL;
 807         }
 808         if (tgt->confq) {
 809                 dma_free_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
 810                                     tgt->confq, tgt->confq_dma);
 811                 tgt->confq = NULL;
 812         }
 813         /* Free XFERQ */
 814         if (tgt->xferq) {
 815                 dma_free_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
 816                                     tgt->xferq, tgt->xferq_dma);
 817                 tgt->xferq = NULL;
 818         }
 819         /* Free RQ PBL and RQ */
 820         if (tgt->rq_pbl) {
 821                 dma_free_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
 822                                     tgt->rq_pbl, tgt->rq_pbl_dma);
 823                 tgt->rq_pbl = NULL;
 824         }
 825         if (tgt->rq) {
 826                 dma_free_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
 827                                     tgt->rq, tgt->rq_dma);
 828                 tgt->rq = NULL;
 829         }
 830         /* Free CQ */
 831         spin_lock_bh(&tgt->cq_lock);
 832         if (tgt->cq) {
 833                 dma_free_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
 834                                     tgt->cq, tgt->cq_dma);
 835                 tgt->cq = NULL;
 836         }
 837         spin_unlock_bh(&tgt->cq_lock);
 838         /* Free SQ */
 839         if (tgt->sq) {
 840                 dma_free_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
 841                                     tgt->sq, tgt->sq_dma);
 842                 tgt->sq = NULL;
 843         }
 844 }