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         /* Arm CQ */
 137         bnx2fc_arm_cq(tgt);
 138         return;
 139
 140 ofld_err:
 141         /* couldn't offload the session. log off from this rport */
 142         BNX2FC_TGT_DBG(tgt, "bnx2fc_offload_session - offload error\n");
 143         lport->tt.rport_logoff(rdata);
 144         /* Free session resources */
 145         bnx2fc_free_session_resc(hba, tgt);
 146         if (tgt->fcoe_conn_id != -1)
 147                 bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
 148 }
 149
 150 void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
 151 {
 152         struct bnx2fc_cmd *io_req;
 153         struct list_head *list;
 154         struct list_head *tmp;
 155         int rc;
 156         int i = 0;
 157         BNX2FC_TGT_DBG(tgt, "Entered flush_active_ios - %d\n",
 158                        tgt->num_active_ios.counter);
 159
 160         spin_lock_bh(&tgt->tgt_lock);
 161         tgt->flush_in_prog = 1;
 162
 163         list_for_each_safe(list, tmp, &tgt->active_cmd_queue) {
 164                 i++;
 165                 io_req = (struct bnx2fc_cmd *)list;
 166                 list_del_init(&io_req->link);
 167                 io_req->on_active_queue = 0;
 168                 BNX2FC_IO_DBG(io_req, "cmd_queue cleanup\n");
 169
 170                 if (cancel_delayed_work(&io_req->timeout_work)) {
 171                         if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
 172                                                 &io_req->req_flags)) {
 173                                 /* Handle eh_abort timeout */
 174                                 BNX2FC_IO_DBG(io_req, "eh_abort for IO "
 175                                               "cleaned up\n");
 176                                 complete(&io_req->tm_done);
 177                         }
 178                         kref_put(&io_req->refcount,
 179                                  bnx2fc_cmd_release); /* drop timer hold */
 180                 }
 181
 182                 set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags);
 183                 set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
 184                 rc = bnx2fc_initiate_cleanup(io_req);
 185                 BUG_ON(rc);
 186         }
 187
 188         list_for_each_safe(list, tmp, &tgt->els_queue) {
 189                 i++;
 190                 io_req = (struct bnx2fc_cmd *)list;
 191                 list_del_init(&io_req->link);
 192                 io_req->on_active_queue = 0;
 193
 194                 BNX2FC_IO_DBG(io_req, "els_queue cleanup\n");
 195
 196                 if (cancel_delayed_work(&io_req->timeout_work))
 197                         kref_put(&io_req->refcount,
 198                                  bnx2fc_cmd_release); /* drop timer hold */
 199
 200                 if ((io_req->cb_func) && (io_req->cb_arg)) {
 201                         io_req->cb_func(io_req->cb_arg);
 202                         io_req->cb_arg = NULL;
 203                 }
 204
 205                 rc = bnx2fc_initiate_cleanup(io_req);
 206                 BUG_ON(rc);
 207         }
 208
 209         list_for_each_safe(list, tmp, &tgt->io_retire_queue) {
 210                 i++;
 211                 io_req = (struct bnx2fc_cmd *)list;
 212                 list_del_init(&io_req->link);
 213
 214                 BNX2FC_IO_DBG(io_req, "retire_queue flush\n");
 215
 216                 if (cancel_delayed_work(&io_req->timeout_work))
 217                         kref_put(&io_req->refcount, bnx2fc_cmd_release);
 218
 219                 clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
 220         }
 221
 222         BNX2FC_TGT_DBG(tgt, "IOs flushed = %d\n", i);
 223         i = 0;
 224         spin_unlock_bh(&tgt->tgt_lock);
 225         /* wait for active_ios to go to 0 */
 226         while ((tgt->num_active_ios.counter != 0) && (i++ < BNX2FC_WAIT_CNT))
 227                 msleep(25);
 228         if (tgt->num_active_ios.counter != 0)
 229                 printk(KERN_ERR PFX "CLEANUP on port 0x%x:"
 230                                     " active_ios = %d\n",
 231                         tgt->rdata->ids.port_id, tgt->num_active_ios.counter);
 232         spin_lock_bh(&tgt->tgt_lock);
 233         tgt->flush_in_prog = 0;
 234         spin_unlock_bh(&tgt->tgt_lock);
 235 }
 236
 237 static void bnx2fc_upload_session(struct fcoe_port *port,
 238                                         struct bnx2fc_rport *tgt)
 239 {
 240         struct bnx2fc_hba *hba = port->priv;
 241
 242         BNX2FC_TGT_DBG(tgt, "upload_session: active_ios = %d\n",
 243                 tgt->num_active_ios.counter);
 244
 245         /*
 246          * Called with hba->hba_mutex held.
 247          * This is a blocking call
 248          */
 249         clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
 250         bnx2fc_send_session_disable_req(port, tgt);
 251
 252         /*
 253          * wait for upload to complete. 3 Secs
 254          * should be sufficient time for this process to complete.
 255          */
 256         setup_timer(&tgt->upld_timer, bnx2fc_upld_timer, (unsigned long)tgt);
 257         mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
 258
 259         BNX2FC_TGT_DBG(tgt, "waiting for disable compl\n");
 260         wait_event_interruptible(tgt->upld_wait,
 261                                  (test_bit(
 262                                   BNX2FC_FLAG_UPLD_REQ_COMPL,
 263                                   &tgt->flags)));
 264
 265         if (signal_pending(current))
 266                 flush_signals(current);
 267
 268         del_timer_sync(&tgt->upld_timer);
 269
 270         /*
 271          * traverse thru the active_q and tmf_q and cleanup
 272          * IOs in these lists
 273          */
 274         BNX2FC_TGT_DBG(tgt, "flush/upload - disable wait flags = 0x%lx\n",
 275                        tgt->flags);
 276         bnx2fc_flush_active_ios(tgt);
 277
 278         /* Issue destroy KWQE */
 279         if (test_bit(BNX2FC_FLAG_DISABLED, &tgt->flags)) {
 280                 BNX2FC_TGT_DBG(tgt, "send destroy req\n");
 281                 clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
 282                 bnx2fc_send_session_destroy_req(hba, tgt);
 283
 284                 /* wait for destroy to complete */
 285                 setup_timer(&tgt->upld_timer,
 286                             bnx2fc_upld_timer, (unsigned long)tgt);
 287                 mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
 288
 289                 wait_event_interruptible(tgt->upld_wait,
 290                                          (test_bit(
 291                                           BNX2FC_FLAG_UPLD_REQ_COMPL,
 292                                           &tgt->flags)));
 293
 294                 if (!(test_bit(BNX2FC_FLAG_DESTROYED, &tgt->flags)))
 295                         printk(KERN_ERR PFX "ERROR!! destroy timed out\n");
 296
 297                 BNX2FC_TGT_DBG(tgt, "destroy wait complete flags = 0x%lx\n",
 298                         tgt->flags);
 299                 if (signal_pending(current))
 300                         flush_signals(current);
 301
 302                 del_timer_sync(&tgt->upld_timer);
 303
 304         } else
 305                 printk(KERN_ERR PFX "ERROR!! DISABLE req timed out, destroy"
 306                                 " not sent to FW\n");
 307
 308         /* Free session resources */
 309         bnx2fc_free_session_resc(hba, tgt);
 310         bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
 311 }
 312
 313 static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
 314                            struct fcoe_port *port,
 315                            struct fc_rport_priv *rdata)
 316 {
 317
 318         struct fc_rport *rport = rdata->rport;
 319         struct bnx2fc_hba *hba = port->priv;
 320         struct b577xx_doorbell_set_prod *sq_db = &tgt->sq_db;
 321         struct b577xx_fcoe_rx_doorbell *rx_db = &tgt->rx_db;
 322
 323         tgt->rport = rport;
 324         tgt->rdata = rdata;
 325         tgt->port = port;
 326
 327         if (hba->num_ofld_sess >= BNX2FC_NUM_MAX_SESS) {
 328                 BNX2FC_TGT_DBG(tgt, "exceeded max sessions. logoff this tgt\n");
 329                 tgt->fcoe_conn_id = -1;
 330                 return -1;
 331         }
 332
 333         tgt->fcoe_conn_id = bnx2fc_alloc_conn_id(hba, tgt);
 334         if (tgt->fcoe_conn_id == -1)
 335                 return -1;
 336
 337         BNX2FC_TGT_DBG(tgt, "init_tgt - conn_id = 0x%x\n", tgt->fcoe_conn_id);
 338
 339         tgt->max_sqes = BNX2FC_SQ_WQES_MAX;
 340         tgt->max_rqes = BNX2FC_RQ_WQES_MAX;
 341         tgt->max_cqes = BNX2FC_CQ_WQES_MAX;
 342         atomic_set(&tgt->free_sqes, BNX2FC_SQ_WQES_MAX);
 343
 344         /* Initialize the toggle bit */
 345         tgt->sq_curr_toggle_bit = 1;
 346         tgt->cq_curr_toggle_bit = 1;
 347         tgt->sq_prod_idx = 0;
 348         tgt->cq_cons_idx = 0;
 349         tgt->rq_prod_idx = 0x8000;
 350         tgt->rq_cons_idx = 0;
 351         atomic_set(&tgt->num_active_ios, 0);
 352
 353         /* initialize sq doorbell */
 354         sq_db->header.header = B577XX_DOORBELL_HDR_DB_TYPE;
 355         sq_db->header.header |= B577XX_FCOE_CONNECTION_TYPE <<
 356                                         B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT;
 357         /* initialize rx doorbell */
 358         rx_db->hdr.header = ((0x1 << B577XX_DOORBELL_HDR_RX_SHIFT) |
 359                           (0x1 << B577XX_DOORBELL_HDR_DB_TYPE_SHIFT) |
 360                           (B577XX_FCOE_CONNECTION_TYPE <<
 361                                 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT));
 362         rx_db->params = (0x2 << B577XX_FCOE_RX_DOORBELL_NEGATIVE_ARM_SHIFT) |
 363                      (0x3 << B577XX_FCOE_RX_DOORBELL_OPCODE_SHIFT);
 364
 365         spin_lock_init(&tgt->tgt_lock);
 366         spin_lock_init(&tgt->cq_lock);
 367
 368         /* Initialize active_cmd_queue list */
 369         INIT_LIST_HEAD(&tgt->active_cmd_queue);
 370
 371         /* Initialize IO retire queue */
 372         INIT_LIST_HEAD(&tgt->io_retire_queue);
 373
 374         INIT_LIST_HEAD(&tgt->els_queue);
 375
 376         /* Initialize active_tm_queue list */
 377         INIT_LIST_HEAD(&tgt->active_tm_queue);
 378
 379         init_waitqueue_head(&tgt->ofld_wait);
 380         init_waitqueue_head(&tgt->upld_wait);
 381
 382         return 0;
 383 }
 384
 385 /**
 386  * This event_callback is called after successful completion of libfc
 387  * initiated target login. bnx2fc can proceed with initiating the session
 388  * establishment.
 389  */
 390 void bnx2fc_rport_event_handler(struct fc_lport *lport,
 391                                 struct fc_rport_priv *rdata,
 392                                 enum fc_rport_event event)
 393 {
 394         struct fcoe_port *port = lport_priv(lport);
 395         struct bnx2fc_hba *hba = port->priv;
 396         struct fc_rport *rport = rdata->rport;
 397         struct fc_rport_libfc_priv *rp;
 398         struct bnx2fc_rport *tgt;
 399         u32 port_id;
 400
 401         BNX2FC_HBA_DBG(lport, "rport_event_hdlr: event = %d, port_id = 0x%x\n",
 402                 event, rdata->ids.port_id);
 403         switch (event) {
 404         case RPORT_EV_READY:
 405                 if (!rport) {
 406                         printk(KERN_ALERT PFX "rport is NULL: ERROR!\n");
 407                         break;
 408                 }
 409
 410                 rp = rport->dd_data;
 411                 if (rport->port_id == FC_FID_DIR_SERV) {
 412                         /*
 413                          * bnx2fc_rport structure doesn't exist for
 414                          * directory server.
 415                          * We should not come here, as lport will
 416                          * take care of fabric login
 417                          */
 418                         printk(KERN_ALERT PFX "%x - rport_event_handler ERROR\n",
 419                                 rdata->ids.port_id);
 420                         break;
 421                 }
 422
 423                 if (rdata->spp_type != FC_TYPE_FCP) {
 424                         BNX2FC_HBA_DBG(lport, "not FCP type target."
 425                                    " not offloading\n");
 426                         break;
 427                 }
 428                 if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
 429                         BNX2FC_HBA_DBG(lport, "not FCP_TARGET"
 430                                    " not offloading\n");
 431                         break;
 432                 }
 433
 434                 /*
 435                  * Offlaod process is protected with hba mutex.
 436                  * Use the same mutex_lock for upload process too
 437                  */
 438                 mutex_lock(&hba->hba_mutex);
 439                 tgt = (struct bnx2fc_rport *)&rp[1];
 440
 441                 /* This can happen when ADISC finds the same target */
 442                 if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
 443                         BNX2FC_TGT_DBG(tgt, "already offloaded\n");
 444                         mutex_unlock(&hba->hba_mutex);
 445                         return;
 446                 }
 447
 448                 /*
 449                  * Offload the session. This is a blocking call, and will
 450                  * wait until the session is offloaded.
 451                  */
 452                 bnx2fc_offload_session(port, tgt, rdata);
 453
 454                 BNX2FC_TGT_DBG(tgt, "OFFLOAD num_ofld_sess = %d\n",
 455                         hba->num_ofld_sess);
 456
 457                 if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
 458                         /*
 459                          * Session is offloaded and enabled. Map
 460                          * doorbell register for this target
 461                          */
 462                         BNX2FC_TGT_DBG(tgt, "sess offloaded\n");
 463                         /* This counter is protected with hba mutex */
 464                         hba->num_ofld_sess++;
 465
 466                         set_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
 467                 } else {
 468                         /*
 469                          * Offload or enable would have failed.
 470                          * In offload/enable completion path, the
 471                          * rport would have already been removed
 472                          */
 473                         BNX2FC_TGT_DBG(tgt, "Port is being logged off as "
 474                                    "offloaded flag not set\n");
 475                 }
 476                 mutex_unlock(&hba->hba_mutex);
 477                 break;
 478         case RPORT_EV_LOGO:
 479         case RPORT_EV_FAILED:
 480         case RPORT_EV_STOP:
 481                 port_id = rdata->ids.port_id;
 482                 if (port_id == FC_FID_DIR_SERV)
 483                         break;
 484
 485                 if (!rport) {
 486                         printk(KERN_ALERT PFX "%x - rport not created Yet!!\n",
 487                                 port_id);
 488                         break;
 489                 }
 490                 rp = rport->dd_data;
 491                 mutex_lock(&hba->hba_mutex);
 492                 /*
 493                  * Perform session upload. Note that rdata->peers is already
 494                  * removed from disc->rports list before we get this event.
 495                  */
 496                 tgt = (struct bnx2fc_rport *)&rp[1];
 497
 498                 if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
 499                         mutex_unlock(&hba->hba_mutex);
 500                         break;
 501                 }
 502                 clear_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
 503
 504                 bnx2fc_upload_session(port, tgt);
 505                 hba->num_ofld_sess--;
 506                 BNX2FC_TGT_DBG(tgt, "UPLOAD num_ofld_sess = %d\n",
 507                         hba->num_ofld_sess);
 508                 /*
 509                  * Try to wake up the linkdown wait thread. If num_ofld_sess
 510                  * is 0, the waiting therad wakes up
 511                  */
 512                 if ((hba->wait_for_link_down) &&
 513                     (hba->num_ofld_sess == 0)) {
 514                         wake_up_interruptible(&hba->shutdown_wait);
 515                 }
 516                 if (test_bit(BNX2FC_FLAG_EXPL_LOGO, &tgt->flags)) {
 517                         printk(KERN_ERR PFX "Relogin to the tgt\n");
 518                         mutex_lock(&lport->disc.disc_mutex);
 519                         lport->tt.rport_login(rdata);
 520                         mutex_unlock(&lport->disc.disc_mutex);
 521                 }
 522                 mutex_unlock(&hba->hba_mutex);
 523
 524                 break;
 525
 526         case RPORT_EV_NONE:
 527                 break;
 528         }
 529 }
 530
 531 /**
 532  * bnx2fc_tgt_lookup() - Lookup a bnx2fc_rport by port_id
 533  *
 534  * @port:  fcoe_port struct to lookup the target port on
 535  * @port_id: The remote port ID to look up
 536  */
 537 struct bnx2fc_rport *bnx2fc_tgt_lookup(struct fcoe_port *port,
 538                                              u32 port_id)
 539 {
 540         struct bnx2fc_hba *hba = port->priv;
 541         struct bnx2fc_rport *tgt;
 542         struct fc_rport_priv *rdata;
 543         int i;
 544
 545         for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
 546                 tgt = hba->tgt_ofld_list[i];
 547                 if ((tgt) && (tgt->port == port)) {
 548                         rdata = tgt->rdata;
 549                         if (rdata->ids.port_id == port_id) {
 550                                 if (rdata->rp_state != RPORT_ST_DELETE) {
 551                                         BNX2FC_TGT_DBG(tgt, "rport "
 552                                                 "obtained\n");
 553                                         return tgt;
 554                                 } else {
 555                                         printk(KERN_ERR PFX "rport 0x%x "
 556                                                 "is in DELETED state\n",
 557                                                 rdata->ids.port_id);
 558                                         return NULL;
 559                                 }
 560                         }
 561                 }
 562         }
 563         return NULL;
 564 }
 565
 566
 567 /**
 568  * bnx2fc_alloc_conn_id - allocates FCOE Connection id
 569  *
 570  * @hba:        pointer to adapter structure
 571  * @tgt:        pointer to bnx2fc_rport structure
 572  */
 573 static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
 574                                 struct bnx2fc_rport *tgt)
 575 {
 576         u32 conn_id, next;
 577
 578         /* called with hba mutex held */
 579
 580         /*
 581          * tgt_ofld_list access is synchronized using
 582          * both hba mutex and hba lock. Atleast hba mutex or
 583          * hba lock needs to be held for read access.
 584          */
 585
 586         spin_lock_bh(&hba->hba_lock);
 587         next = hba->next_conn_id;
 588         conn_id = hba->next_conn_id++;
 589         if (hba->next_conn_id == BNX2FC_NUM_MAX_SESS)
 590                 hba->next_conn_id = 0;
 591
 592         while (hba->tgt_ofld_list[conn_id] != NULL) {
 593                 conn_id++;
 594                 if (conn_id == BNX2FC_NUM_MAX_SESS)
 595                         conn_id = 0;
 596
 597                 if (conn_id == next) {
 598                         /* No free conn_ids are available */
 599                         spin_unlock_bh(&hba->hba_lock);
 600                         return -1;
 601                 }
 602         }
 603         hba->tgt_ofld_list[conn_id] = tgt;
 604         tgt->fcoe_conn_id = conn_id;
 605         spin_unlock_bh(&hba->hba_lock);
 606         return conn_id;
 607 }
 608
 609 static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id)
 610 {
 611         /* called with hba mutex held */
 612         spin_lock_bh(&hba->hba_lock);
 613         hba->tgt_ofld_list[conn_id] = NULL;
 614         hba->next_conn_id = conn_id;
 615         spin_unlock_bh(&hba->hba_lock);
 616 }
 617
 618 /**
 619  *bnx2fc_alloc_session_resc - Allocate qp resources for the session
 620  *
 621  */
 622 static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
 623                                         struct bnx2fc_rport *tgt)
 624 {
 625         dma_addr_t page;
 626         int num_pages;
 627         u32 *pbl;
 628
 629         /* Allocate and map SQ */
 630         tgt->sq_mem_size = tgt->max_sqes * BNX2FC_SQ_WQE_SIZE;
 631         tgt->sq_mem_size = (tgt->sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 632
 633         tgt->sq = dma_alloc_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
 634                                      &tgt->sq_dma, GFP_KERNEL);
 635         if (!tgt->sq) {
 636                 printk(KERN_ALERT PFX "unable to allocate SQ memory %d\n",
 637                         tgt->sq_mem_size);
 638                 goto mem_alloc_failure;
 639         }
 640         memset(tgt->sq, 0, tgt->sq_mem_size);
 641
 642         /* Allocate and map CQ */
 643         tgt->cq_mem_size = tgt->max_cqes * BNX2FC_CQ_WQE_SIZE;
 644         tgt->cq_mem_size = (tgt->cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 645
 646         tgt->cq = dma_alloc_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
 647                                      &tgt->cq_dma, GFP_KERNEL);
 648         if (!tgt->cq) {
 649                 printk(KERN_ALERT PFX "unable to allocate CQ memory %d\n",
 650                         tgt->cq_mem_size);
 651                 goto mem_alloc_failure;
 652         }
 653         memset(tgt->cq, 0, tgt->cq_mem_size);
 654
 655         /* Allocate and map RQ and RQ PBL */
 656         tgt->rq_mem_size = tgt->max_rqes * BNX2FC_RQ_WQE_SIZE;
 657         tgt->rq_mem_size = (tgt->rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 658
 659         tgt->rq = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
 660                                         &tgt->rq_dma, GFP_KERNEL);
 661         if (!tgt->rq) {
 662                 printk(KERN_ALERT PFX "unable to allocate RQ memory %d\n",
 663                         tgt->rq_mem_size);
 664                 goto mem_alloc_failure;
 665         }
 666         memset(tgt->rq, 0, tgt->rq_mem_size);
 667
 668         tgt->rq_pbl_size = (tgt->rq_mem_size / PAGE_SIZE) * sizeof(void *);
 669         tgt->rq_pbl_size = (tgt->rq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 670
 671         tgt->rq_pbl = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
 672                                          &tgt->rq_pbl_dma, GFP_KERNEL);
 673         if (!tgt->rq_pbl) {
 674                 printk(KERN_ALERT PFX "unable to allocate RQ PBL %d\n",
 675                         tgt->rq_pbl_size);
 676                 goto mem_alloc_failure;
 677         }
 678
 679         memset(tgt->rq_pbl, 0, tgt->rq_pbl_size);
 680         num_pages = tgt->rq_mem_size / PAGE_SIZE;
 681         page = tgt->rq_dma;
 682         pbl = (u32 *)tgt->rq_pbl;
 683
 684         while (num_pages--) {
 685                 *pbl = (u32)page;
 686                 pbl++;
 687                 *pbl = (u32)((u64)page >> 32);
 688                 pbl++;
 689                 page += PAGE_SIZE;
 690         }
 691
 692         /* Allocate and map XFERQ */
 693         tgt->xferq_mem_size = tgt->max_sqes * BNX2FC_XFERQ_WQE_SIZE;
 694         tgt->xferq_mem_size = (tgt->xferq_mem_size + (PAGE_SIZE - 1)) &
 695                                PAGE_MASK;
 696
 697         tgt->xferq = dma_alloc_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
 698                                         &tgt->xferq_dma, GFP_KERNEL);
 699         if (!tgt->xferq) {
 700                 printk(KERN_ALERT PFX "unable to allocate XFERQ %d\n",
 701                         tgt->xferq_mem_size);
 702                 goto mem_alloc_failure;
 703         }
 704         memset(tgt->xferq, 0, tgt->xferq_mem_size);
 705
 706         /* Allocate and map CONFQ & CONFQ PBL */
 707         tgt->confq_mem_size = tgt->max_sqes * BNX2FC_CONFQ_WQE_SIZE;
 708         tgt->confq_mem_size = (tgt->confq_mem_size + (PAGE_SIZE - 1)) &
 709                                PAGE_MASK;
 710
 711         tgt->confq = dma_alloc_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
 712                                         &tgt->confq_dma, GFP_KERNEL);
 713         if (!tgt->confq) {
 714                 printk(KERN_ALERT PFX "unable to allocate CONFQ %d\n",
 715                         tgt->confq_mem_size);
 716                 goto mem_alloc_failure;
 717         }
 718         memset(tgt->confq, 0, tgt->confq_mem_size);
 719
 720         tgt->confq_pbl_size =
 721                 (tgt->confq_mem_size / PAGE_SIZE) * sizeof(void *);
 722         tgt->confq_pbl_size =
 723                 (tgt->confq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 724
 725         tgt->confq_pbl = dma_alloc_coherent(&hba->pcidev->dev,
 726                                             tgt->confq_pbl_size,
 727                                             &tgt->confq_pbl_dma, GFP_KERNEL);
 728         if (!tgt->confq_pbl) {
 729                 printk(KERN_ALERT PFX "unable to allocate CONFQ PBL %d\n",
 730                         tgt->confq_pbl_size);
 731                 goto mem_alloc_failure;
 732         }
 733
 734         memset(tgt->confq_pbl, 0, tgt->confq_pbl_size);
 735         num_pages = tgt->confq_mem_size / PAGE_SIZE;
 736         page = tgt->confq_dma;
 737         pbl = (u32 *)tgt->confq_pbl;
 738
 739         while (num_pages--) {
 740                 *pbl = (u32)page;
 741                 pbl++;
 742                 *pbl = (u32)((u64)page >> 32);
 743                 pbl++;
 744                 page += PAGE_SIZE;
 745         }
 746
 747         /* Allocate and map ConnDB */
 748         tgt->conn_db_mem_size = sizeof(struct fcoe_conn_db);
 749
 750         tgt->conn_db = dma_alloc_coherent(&hba->pcidev->dev,
 751                                           tgt->conn_db_mem_size,
 752                                           &tgt->conn_db_dma, GFP_KERNEL);
 753         if (!tgt->conn_db) {
 754                 printk(KERN_ALERT PFX "unable to allocate conn_db %d\n",
 755                                                 tgt->conn_db_mem_size);
 756                 goto mem_alloc_failure;
 757         }
 758         memset(tgt->conn_db, 0, tgt->conn_db_mem_size);
 759
 760
 761         /* Allocate and map LCQ */
 762         tgt->lcq_mem_size = (tgt->max_sqes + 8) * BNX2FC_SQ_WQE_SIZE;
 763         tgt->lcq_mem_size = (tgt->lcq_mem_size + (PAGE_SIZE - 1)) &
 764                              PAGE_MASK;
 765
 766         tgt->lcq = dma_alloc_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
 767                                       &tgt->lcq_dma, GFP_KERNEL);
 768
 769         if (!tgt->lcq) {
 770                 printk(KERN_ALERT PFX "unable to allocate lcq %d\n",
 771                        tgt->lcq_mem_size);
 772                 goto mem_alloc_failure;
 773         }
 774         memset(tgt->lcq, 0, tgt->lcq_mem_size);
 775
 776         tgt->conn_db->rq_prod = 0x8000;
 777
 778         return 0;
 779
 780 mem_alloc_failure:
 781         bnx2fc_free_session_resc(hba, tgt);
 782         bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
 783         return -ENOMEM;
 784 }
 785
 786 /**
 787  * bnx2i_free_session_resc - free qp resources for the session
 788  *
 789  * @hba:        adapter structure pointer
 790  * @tgt:        bnx2fc_rport structure pointer
 791  *
 792  * Free QP resources - SQ/RQ/CQ/XFERQ memory and PBL
 793  */
 794 static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
 795                                                 struct bnx2fc_rport *tgt)
 796 {
 797         BNX2FC_TGT_DBG(tgt, "Freeing up session resources\n");
 798
 799         if (tgt->ctx_base) {
 800                 iounmap(tgt->ctx_base);
 801                 tgt->ctx_base = NULL;
 802         }
 803
 804         spin_lock_bh(&tgt->cq_lock);
 805         /* Free LCQ */
 806         if (tgt->lcq) {
 807                 dma_free_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
 808                                     tgt->lcq, tgt->lcq_dma);
 809                 tgt->lcq = NULL;
 810         }
 811         /* Free connDB */
 812         if (tgt->conn_db) {
 813                 dma_free_coherent(&hba->pcidev->dev, tgt->conn_db_mem_size,
 814                                     tgt->conn_db, tgt->conn_db_dma);
 815                 tgt->conn_db = NULL;
 816         }
 817         /* Free confq  and confq pbl */
 818         if (tgt->confq_pbl) {
 819                 dma_free_coherent(&hba->pcidev->dev, tgt->confq_pbl_size,
 820                                     tgt->confq_pbl, tgt->confq_pbl_dma);
 821                 tgt->confq_pbl = NULL;
 822         }
 823         if (tgt->confq) {
 824                 dma_free_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
 825                                     tgt->confq, tgt->confq_dma);
 826                 tgt->confq = NULL;
 827         }
 828         /* Free XFERQ */
 829         if (tgt->xferq) {
 830                 dma_free_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
 831                                     tgt->xferq, tgt->xferq_dma);
 832                 tgt->xferq = NULL;
 833         }
 834         /* Free RQ PBL and RQ */
 835         if (tgt->rq_pbl) {
 836                 dma_free_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
 837                                     tgt->rq_pbl, tgt->rq_pbl_dma);
 838                 tgt->rq_pbl = NULL;
 839         }
 840         if (tgt->rq) {
 841                 dma_free_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
 842                                     tgt->rq, tgt->rq_dma);
 843                 tgt->rq = NULL;
 844         }
 845         /* Free CQ */
 846         if (tgt->cq) {
 847                 dma_free_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
 848                                     tgt->cq, tgt->cq_dma);
 849                 tgt->cq = NULL;
 850         }
 851         /* Free SQ */
 852         if (tgt->sq) {
 853                 dma_free_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
 854                                     tgt->sq, tgt->sq_dma);
 855                 tgt->sq = NULL;
 856         }
 857         spin_unlock_bh(&tgt->cq_lock);
 858 }