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 - 2011 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_interface *interface = port->priv;
  69         struct bnx2fc_hba *hba = interface->hba;
  70         int rval;
  71         int i = 0;
  72
  73         /* Initialize bnx2fc_rport */
  74         /* NOTE: tgt is already bzero'd */
  75         rval = bnx2fc_init_tgt(tgt, port, rdata);
  76         if (rval) {
  77                 printk(KERN_ERR PFX "Failed to allocate conn id for "
  78                         "port_id (%6x)\n", rport->port_id);
  79                 goto tgt_init_err;
  80         }
  81
  82         /* Allocate session resources */
  83         rval = bnx2fc_alloc_session_resc(hba, tgt);
  84         if (rval) {
  85                 printk(KERN_ERR PFX "Failed to allocate resources\n");
  86                 goto ofld_err;
  87         }
  88
  89         /*
  90          * Initialize FCoE session offload process.
  91          * Upon completion of offload process add
  92          * rport to list of rports
  93          */
  94 retry_ofld:
  95         clear_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
  96         rval = bnx2fc_send_session_ofld_req(port, tgt);
  97         if (rval) {
  98                 printk(KERN_ERR PFX "ofld_req failed\n");
  99                 goto ofld_err;
 100         }
 101
 102         /*
 103          * wait for the session is offloaded and enabled. 3 Secs
 104          * should be ample time for this process to complete.
 105          */
 106         setup_timer(&tgt->ofld_timer, bnx2fc_ofld_timer, (unsigned long)tgt);
 107         mod_timer(&tgt->ofld_timer, jiffies + BNX2FC_FW_TIMEOUT);
 108
 109         wait_event_interruptible(tgt->ofld_wait,
 110                                  (test_bit(
 111                                   BNX2FC_FLAG_OFLD_REQ_CMPL,
 112                                   &tgt->flags)));
 113         if (signal_pending(current))
 114                 flush_signals(current);
 115
 116         del_timer_sync(&tgt->ofld_timer);
 117
 118         if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
 119                 if (test_and_clear_bit(BNX2FC_FLAG_CTX_ALLOC_FAILURE,
 120                                        &tgt->flags)) {
 121                         BNX2FC_TGT_DBG(tgt, "ctx_alloc_failure, "
 122                                 "retry ofld..%d\n", i++);
 123                         msleep_interruptible(1000);
 124                         if (i > 3) {
 125                                 i = 0;
 126                                 goto ofld_err;
 127                         }
 128                         goto retry_ofld;
 129                 }
 130                 goto ofld_err;
 131         }
 132         if (bnx2fc_map_doorbell(tgt)) {
 133                 printk(KERN_ERR PFX "map doorbell failed - no mem\n");
 134                 /* upload will take care of cleaning up sess resc */
 135                 lport->tt.rport_logoff(rdata);
 136         }
 137         return;
 138
 139 ofld_err:
 140         /* couldn't offload the session. log off from this rport */
 141         BNX2FC_TGT_DBG(tgt, "bnx2fc_offload_session - offload error\n");
 142         /* Free session resources */
 143         bnx2fc_free_session_resc(hba, tgt);
 144 tgt_init_err:
 145         if (tgt->fcoe_conn_id != -1)
 146                 bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
 147         lport->tt.rport_logoff(rdata);
 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_interface *interface = port->priv;
 241         struct bnx2fc_hba *hba = interface->hba;
 242
 243         BNX2FC_TGT_DBG(tgt, "upload_session: active_ios = %d\n",
 244                 tgt->num_active_ios.counter);
 245
 246         /*
 247          * Called with hba->hba_mutex held.
 248          * This is a blocking call
 249          */
 250         clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
 251         bnx2fc_send_session_disable_req(port, tgt);
 252
 253         /*
 254          * wait for upload to complete. 3 Secs
 255          * should be sufficient time for this process to complete.
 256          */
 257         setup_timer(&tgt->upld_timer, bnx2fc_upld_timer, (unsigned long)tgt);
 258         mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
 259
 260         BNX2FC_TGT_DBG(tgt, "waiting for disable compl\n");
 261         wait_event_interruptible(tgt->upld_wait,
 262                                  (test_bit(
 263                                   BNX2FC_FLAG_UPLD_REQ_COMPL,
 264                                   &tgt->flags)));
 265
 266         if (signal_pending(current))
 267                 flush_signals(current);
 268
 269         del_timer_sync(&tgt->upld_timer);
 270
 271         /*
 272          * traverse thru the active_q and tmf_q and cleanup
 273          * IOs in these lists
 274          */
 275         BNX2FC_TGT_DBG(tgt, "flush/upload - disable wait flags = 0x%lx\n",
 276                        tgt->flags);
 277         bnx2fc_flush_active_ios(tgt);
 278
 279         /* Issue destroy KWQE */
 280         if (test_bit(BNX2FC_FLAG_DISABLED, &tgt->flags)) {
 281                 BNX2FC_TGT_DBG(tgt, "send destroy req\n");
 282                 clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
 283                 bnx2fc_send_session_destroy_req(hba, tgt);
 284
 285                 /* wait for destroy to complete */
 286                 setup_timer(&tgt->upld_timer,
 287                             bnx2fc_upld_timer, (unsigned long)tgt);
 288                 mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
 289
 290                 wait_event_interruptible(tgt->upld_wait,
 291                                          (test_bit(
 292                                           BNX2FC_FLAG_UPLD_REQ_COMPL,
 293                                           &tgt->flags)));
 294
 295                 if (!(test_bit(BNX2FC_FLAG_DESTROYED, &tgt->flags)))
 296                         printk(KERN_ERR PFX "ERROR!! destroy timed out\n");
 297
 298                 BNX2FC_TGT_DBG(tgt, "destroy wait complete flags = 0x%lx\n",
 299                         tgt->flags);
 300                 if (signal_pending(current))
 301                         flush_signals(current);
 302
 303                 del_timer_sync(&tgt->upld_timer);
 304
 305         } else
 306                 printk(KERN_ERR PFX "ERROR!! DISABLE req timed out, destroy"
 307                                 " not sent to FW\n");
 308
 309         /* Free session resources */
 310         bnx2fc_free_session_resc(hba, tgt);
 311         bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
 312 }
 313
 314 static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
 315                            struct fcoe_port *port,
 316                            struct fc_rport_priv *rdata)
 317 {
 318
 319         struct fc_rport *rport = rdata->rport;
 320         struct bnx2fc_interface *interface = port->priv;
 321         struct bnx2fc_hba *hba = interface->hba;
 322         struct b577xx_doorbell_set_prod *sq_db = &tgt->sq_db;
 323         struct b577xx_fcoe_rx_doorbell *rx_db = &tgt->rx_db;
 324
 325         tgt->rport = rport;
 326         tgt->rdata = rdata;
 327         tgt->port = port;
 328
 329         if (hba->num_ofld_sess >= BNX2FC_NUM_MAX_SESS) {
 330                 BNX2FC_TGT_DBG(tgt, "exceeded max sessions. logoff this tgt\n");
 331                 tgt->fcoe_conn_id = -1;
 332                 return -1;
 333         }
 334
 335         tgt->fcoe_conn_id = bnx2fc_alloc_conn_id(hba, tgt);
 336         if (tgt->fcoe_conn_id == -1)
 337                 return -1;
 338
 339         BNX2FC_TGT_DBG(tgt, "init_tgt - conn_id = 0x%x\n", tgt->fcoe_conn_id);
 340
 341         tgt->max_sqes = BNX2FC_SQ_WQES_MAX;
 342         tgt->max_rqes = BNX2FC_RQ_WQES_MAX;
 343         tgt->max_cqes = BNX2FC_CQ_WQES_MAX;
 344         atomic_set(&tgt->free_sqes, BNX2FC_SQ_WQES_MAX);
 345
 346         /* Initialize the toggle bit */
 347         tgt->sq_curr_toggle_bit = 1;
 348         tgt->cq_curr_toggle_bit = 1;
 349         tgt->sq_prod_idx = 0;
 350         tgt->cq_cons_idx = 0;
 351         tgt->rq_prod_idx = 0x8000;
 352         tgt->rq_cons_idx = 0;
 353         atomic_set(&tgt->num_active_ios, 0);
 354
 355         if (rdata->flags & FC_RP_FLAGS_RETRY) {
 356                 tgt->dev_type = TYPE_TAPE;
 357                 tgt->io_timeout = 0; /* use default ULP timeout */
 358         } else {
 359                 tgt->dev_type = TYPE_DISK;
 360                 tgt->io_timeout = BNX2FC_IO_TIMEOUT;
 361         }
 362
 363         /* initialize sq doorbell */
 364         sq_db->header.header = B577XX_DOORBELL_HDR_DB_TYPE;
 365         sq_db->header.header |= B577XX_FCOE_CONNECTION_TYPE <<
 366                                         B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT;
 367         /* initialize rx doorbell */
 368         rx_db->hdr.header = ((0x1 << B577XX_DOORBELL_HDR_RX_SHIFT) |
 369                           (0x1 << B577XX_DOORBELL_HDR_DB_TYPE_SHIFT) |
 370                           (B577XX_FCOE_CONNECTION_TYPE <<
 371                                 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT));
 372         rx_db->params = (0x2 << B577XX_FCOE_RX_DOORBELL_NEGATIVE_ARM_SHIFT) |
 373                      (0x3 << B577XX_FCOE_RX_DOORBELL_OPCODE_SHIFT);
 374
 375         spin_lock_init(&tgt->tgt_lock);
 376         spin_lock_init(&tgt->cq_lock);
 377
 378         /* Initialize active_cmd_queue list */
 379         INIT_LIST_HEAD(&tgt->active_cmd_queue);
 380
 381         /* Initialize IO retire queue */
 382         INIT_LIST_HEAD(&tgt->io_retire_queue);
 383
 384         INIT_LIST_HEAD(&tgt->els_queue);
 385
 386         /* Initialize active_tm_queue list */
 387         INIT_LIST_HEAD(&tgt->active_tm_queue);
 388
 389         init_waitqueue_head(&tgt->ofld_wait);
 390         init_waitqueue_head(&tgt->upld_wait);
 391
 392         return 0;
 393 }
 394
 395 /**
 396  * This event_callback is called after successful completion of libfc
 397  * initiated target login. bnx2fc can proceed with initiating the session
 398  * establishment.
 399  */
 400 void bnx2fc_rport_event_handler(struct fc_lport *lport,
 401                                 struct fc_rport_priv *rdata,
 402                                 enum fc_rport_event event)
 403 {
 404         struct fcoe_port *port = lport_priv(lport);
 405         struct bnx2fc_interface *interface = port->priv;
 406         struct bnx2fc_hba *hba = interface->hba;
 407         struct fc_rport *rport = rdata->rport;
 408         struct fc_rport_libfc_priv *rp;
 409         struct bnx2fc_rport *tgt;
 410         u32 port_id;
 411
 412         BNX2FC_HBA_DBG(lport, "rport_event_hdlr: event = %d, port_id = 0x%x\n",
 413                 event, rdata->ids.port_id);
 414         switch (event) {
 415         case RPORT_EV_READY:
 416                 if (!rport) {
 417                         printk(KERN_ERR PFX "rport is NULL: ERROR!\n");
 418                         break;
 419                 }
 420
 421                 rp = rport->dd_data;
 422                 if (rport->port_id == FC_FID_DIR_SERV) {
 423                         /*
 424                          * bnx2fc_rport structure doesn't exist for
 425                          * directory server.
 426                          * We should not come here, as lport will
 427                          * take care of fabric login
 428                          */
 429                         printk(KERN_ERR PFX "%x - rport_event_handler ERROR\n",
 430                                 rdata->ids.port_id);
 431                         break;
 432                 }
 433
 434                 if (rdata->spp_type != FC_TYPE_FCP) {
 435                         BNX2FC_HBA_DBG(lport, "not FCP type target."
 436                                    " not offloading\n");
 437                         break;
 438                 }
 439                 if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
 440                         BNX2FC_HBA_DBG(lport, "not FCP_TARGET"
 441                                    " not offloading\n");
 442                         break;
 443                 }
 444
 445                 /*
 446                  * Offlaod process is protected with hba mutex.
 447                  * Use the same mutex_lock for upload process too
 448                  */
 449                 mutex_lock(&hba->hba_mutex);
 450                 tgt = (struct bnx2fc_rport *)&rp[1];
 451
 452                 /* This can happen when ADISC finds the same target */
 453                 if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
 454                         BNX2FC_TGT_DBG(tgt, "already offloaded\n");
 455                         mutex_unlock(&hba->hba_mutex);
 456                         return;
 457                 }
 458
 459                 /*
 460                  * Offload the session. This is a blocking call, and will
 461                  * wait until the session is offloaded.
 462                  */
 463                 bnx2fc_offload_session(port, tgt, rdata);
 464
 465                 BNX2FC_TGT_DBG(tgt, "OFFLOAD num_ofld_sess = %d\n",
 466                         hba->num_ofld_sess);
 467
 468                 if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
 469                         /*
 470                          * Session is offloaded and enabled. Map
 471                          * doorbell register for this target
 472                          */
 473                         BNX2FC_TGT_DBG(tgt, "sess offloaded\n");
 474                         /* This counter is protected with hba mutex */
 475                         hba->num_ofld_sess++;
 476
 477                         set_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
 478                 } else {
 479                         /*
 480                          * Offload or enable would have failed.
 481                          * In offload/enable completion path, the
 482                          * rport would have already been removed
 483                          */
 484                         BNX2FC_TGT_DBG(tgt, "Port is being logged off as "
 485                                    "offloaded flag not set\n");
 486                 }
 487                 mutex_unlock(&hba->hba_mutex);
 488                 break;
 489         case RPORT_EV_LOGO:
 490         case RPORT_EV_FAILED:
 491         case RPORT_EV_STOP:
 492                 port_id = rdata->ids.port_id;
 493                 if (port_id == FC_FID_DIR_SERV)
 494                         break;
 495
 496                 if (!rport) {
 497                         printk(KERN_INFO PFX "%x - rport not created Yet!!\n",
 498                                 port_id);
 499                         break;
 500                 }
 501                 rp = rport->dd_data;
 502                 mutex_lock(&hba->hba_mutex);
 503                 /*
 504                  * Perform session upload. Note that rdata->peers is already
 505                  * removed from disc->rports list before we get this event.
 506                  */
 507                 tgt = (struct bnx2fc_rport *)&rp[1];
 508
 509                 if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
 510                         mutex_unlock(&hba->hba_mutex);
 511                         break;
 512                 }
 513                 clear_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
 514
 515                 bnx2fc_upload_session(port, tgt);
 516                 hba->num_ofld_sess--;
 517                 BNX2FC_TGT_DBG(tgt, "UPLOAD num_ofld_sess = %d\n",
 518                         hba->num_ofld_sess);
 519                 /*
 520                  * Try to wake up the linkdown wait thread. If num_ofld_sess
 521                  * is 0, the waiting therad wakes up
 522                  */
 523                 if ((hba->wait_for_link_down) &&
 524                     (hba->num_ofld_sess == 0)) {
 525                         wake_up_interruptible(&hba->shutdown_wait);
 526                 }
 527                 if (test_bit(BNX2FC_FLAG_EXPL_LOGO, &tgt->flags)) {
 528                         printk(KERN_ERR PFX "Relogin to the tgt\n");
 529                         mutex_lock(&lport->disc.disc_mutex);
 530                         lport->tt.rport_login(rdata);
 531                         mutex_unlock(&lport->disc.disc_mutex);
 532                 }
 533                 mutex_unlock(&hba->hba_mutex);
 534
 535                 break;
 536
 537         case RPORT_EV_NONE:
 538                 break;
 539         }
 540 }
 541
 542 /**
 543  * bnx2fc_tgt_lookup() - Lookup a bnx2fc_rport by port_id
 544  *
 545  * @port:  fcoe_port struct to lookup the target port on
 546  * @port_id: The remote port ID to look up
 547  */
 548 struct bnx2fc_rport *bnx2fc_tgt_lookup(struct fcoe_port *port,
 549                                              u32 port_id)
 550 {
 551         struct bnx2fc_interface *interface = port->priv;
 552         struct bnx2fc_hba *hba = interface->hba;
 553         struct bnx2fc_rport *tgt;
 554         struct fc_rport_priv *rdata;
 555         int i;
 556
 557         for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
 558                 tgt = hba->tgt_ofld_list[i];
 559                 if ((tgt) && (tgt->port == port)) {
 560                         rdata = tgt->rdata;
 561                         if (rdata->ids.port_id == port_id) {
 562                                 if (rdata->rp_state != RPORT_ST_DELETE) {
 563                                         BNX2FC_TGT_DBG(tgt, "rport "
 564                                                 "obtained\n");
 565                                         return tgt;
 566                                 } else {
 567                                         BNX2FC_TGT_DBG(tgt, "rport 0x%x "
 568                                                 "is in DELETED state\n",
 569                                                 rdata->ids.port_id);
 570                                         return NULL;
 571                                 }
 572                         }
 573                 }
 574         }
 575         return NULL;
 576 }
 577
 578
 579 /**
 580  * bnx2fc_alloc_conn_id - allocates FCOE Connection id
 581  *
 582  * @hba:        pointer to adapter structure
 583  * @tgt:        pointer to bnx2fc_rport structure
 584  */
 585 static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
 586                                 struct bnx2fc_rport *tgt)
 587 {
 588         u32 conn_id, next;
 589
 590         /* called with hba mutex held */
 591
 592         /*
 593          * tgt_ofld_list access is synchronized using
 594          * both hba mutex and hba lock. Atleast hba mutex or
 595          * hba lock needs to be held for read access.
 596          */
 597
 598         spin_lock_bh(&hba->hba_lock);
 599         next = hba->next_conn_id;
 600         conn_id = hba->next_conn_id++;
 601         if (hba->next_conn_id == BNX2FC_NUM_MAX_SESS)
 602                 hba->next_conn_id = 0;
 603
 604         while (hba->tgt_ofld_list[conn_id] != NULL) {
 605                 conn_id++;
 606                 if (conn_id == BNX2FC_NUM_MAX_SESS)
 607                         conn_id = 0;
 608
 609                 if (conn_id == next) {
 610                         /* No free conn_ids are available */
 611                         spin_unlock_bh(&hba->hba_lock);
 612                         return -1;
 613                 }
 614         }
 615         hba->tgt_ofld_list[conn_id] = tgt;
 616         tgt->fcoe_conn_id = conn_id;
 617         spin_unlock_bh(&hba->hba_lock);
 618         return conn_id;
 619 }
 620
 621 static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id)
 622 {
 623         /* called with hba mutex held */
 624         spin_lock_bh(&hba->hba_lock);
 625         hba->tgt_ofld_list[conn_id] = NULL;
 626         spin_unlock_bh(&hba->hba_lock);
 627 }
 628
 629 /**
 630  *bnx2fc_alloc_session_resc - Allocate qp resources for the session
 631  *
 632  */
 633 static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
 634                                         struct bnx2fc_rport *tgt)
 635 {
 636         dma_addr_t page;
 637         int num_pages;
 638         u32 *pbl;
 639
 640         /* Allocate and map SQ */
 641         tgt->sq_mem_size = tgt->max_sqes * BNX2FC_SQ_WQE_SIZE;
 642         tgt->sq_mem_size = (tgt->sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 643
 644         tgt->sq = dma_alloc_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
 645                                      &tgt->sq_dma, GFP_KERNEL);
 646         if (!tgt->sq) {
 647                 printk(KERN_ERR PFX "unable to allocate SQ memory %d\n",
 648                         tgt->sq_mem_size);
 649                 goto mem_alloc_failure;
 650         }
 651         memset(tgt->sq, 0, tgt->sq_mem_size);
 652
 653         /* Allocate and map CQ */
 654         tgt->cq_mem_size = tgt->max_cqes * BNX2FC_CQ_WQE_SIZE;
 655         tgt->cq_mem_size = (tgt->cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 656
 657         tgt->cq = dma_alloc_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
 658                                      &tgt->cq_dma, GFP_KERNEL);
 659         if (!tgt->cq) {
 660                 printk(KERN_ERR PFX "unable to allocate CQ memory %d\n",
 661                         tgt->cq_mem_size);
 662                 goto mem_alloc_failure;
 663         }
 664         memset(tgt->cq, 0, tgt->cq_mem_size);
 665
 666         /* Allocate and map RQ and RQ PBL */
 667         tgt->rq_mem_size = tgt->max_rqes * BNX2FC_RQ_WQE_SIZE;
 668         tgt->rq_mem_size = (tgt->rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 669
 670         tgt->rq = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
 671                                         &tgt->rq_dma, GFP_KERNEL);
 672         if (!tgt->rq) {
 673                 printk(KERN_ERR PFX "unable to allocate RQ memory %d\n",
 674                         tgt->rq_mem_size);
 675                 goto mem_alloc_failure;
 676         }
 677         memset(tgt->rq, 0, tgt->rq_mem_size);
 678
 679         tgt->rq_pbl_size = (tgt->rq_mem_size / PAGE_SIZE) * sizeof(void *);
 680         tgt->rq_pbl_size = (tgt->rq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 681
 682         tgt->rq_pbl = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
 683                                          &tgt->rq_pbl_dma, GFP_KERNEL);
 684         if (!tgt->rq_pbl) {
 685                 printk(KERN_ERR PFX "unable to allocate RQ PBL %d\n",
 686                         tgt->rq_pbl_size);
 687                 goto mem_alloc_failure;
 688         }
 689
 690         memset(tgt->rq_pbl, 0, tgt->rq_pbl_size);
 691         num_pages = tgt->rq_mem_size / PAGE_SIZE;
 692         page = tgt->rq_dma;
 693         pbl = (u32 *)tgt->rq_pbl;
 694
 695         while (num_pages--) {
 696                 *pbl = (u32)page;
 697                 pbl++;
 698                 *pbl = (u32)((u64)page >> 32);
 699                 pbl++;
 700                 page += PAGE_SIZE;
 701         }
 702
 703         /* Allocate and map XFERQ */
 704         tgt->xferq_mem_size = tgt->max_sqes * BNX2FC_XFERQ_WQE_SIZE;
 705         tgt->xferq_mem_size = (tgt->xferq_mem_size + (PAGE_SIZE - 1)) &
 706                                PAGE_MASK;
 707
 708         tgt->xferq = dma_alloc_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
 709                                         &tgt->xferq_dma, GFP_KERNEL);
 710         if (!tgt->xferq) {
 711                 printk(KERN_ERR PFX "unable to allocate XFERQ %d\n",
 712                         tgt->xferq_mem_size);
 713                 goto mem_alloc_failure;
 714         }
 715         memset(tgt->xferq, 0, tgt->xferq_mem_size);
 716
 717         /* Allocate and map CONFQ & CONFQ PBL */
 718         tgt->confq_mem_size = tgt->max_sqes * BNX2FC_CONFQ_WQE_SIZE;
 719         tgt->confq_mem_size = (tgt->confq_mem_size + (PAGE_SIZE - 1)) &
 720                                PAGE_MASK;
 721
 722         tgt->confq = dma_alloc_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
 723                                         &tgt->confq_dma, GFP_KERNEL);
 724         if (!tgt->confq) {
 725                 printk(KERN_ERR PFX "unable to allocate CONFQ %d\n",
 726                         tgt->confq_mem_size);
 727                 goto mem_alloc_failure;
 728         }
 729         memset(tgt->confq, 0, tgt->confq_mem_size);
 730
 731         tgt->confq_pbl_size =
 732                 (tgt->confq_mem_size / PAGE_SIZE) * sizeof(void *);
 733         tgt->confq_pbl_size =
 734                 (tgt->confq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 735
 736         tgt->confq_pbl = dma_alloc_coherent(&hba->pcidev->dev,
 737                                             tgt->confq_pbl_size,
 738                                             &tgt->confq_pbl_dma, GFP_KERNEL);
 739         if (!tgt->confq_pbl) {
 740                 printk(KERN_ERR PFX "unable to allocate CONFQ PBL %d\n",
 741                         tgt->confq_pbl_size);
 742                 goto mem_alloc_failure;
 743         }
 744
 745         memset(tgt->confq_pbl, 0, tgt->confq_pbl_size);
 746         num_pages = tgt->confq_mem_size / PAGE_SIZE;
 747         page = tgt->confq_dma;
 748         pbl = (u32 *)tgt->confq_pbl;
 749
 750         while (num_pages--) {
 751                 *pbl = (u32)page;
 752                 pbl++;
 753                 *pbl = (u32)((u64)page >> 32);
 754                 pbl++;
 755                 page += PAGE_SIZE;
 756         }
 757
 758         /* Allocate and map ConnDB */
 759         tgt->conn_db_mem_size = sizeof(struct fcoe_conn_db);
 760
 761         tgt->conn_db = dma_alloc_coherent(&hba->pcidev->dev,
 762                                           tgt->conn_db_mem_size,
 763                                           &tgt->conn_db_dma, GFP_KERNEL);
 764         if (!tgt->conn_db) {
 765                 printk(KERN_ERR PFX "unable to allocate conn_db %d\n",
 766                                                 tgt->conn_db_mem_size);
 767                 goto mem_alloc_failure;
 768         }
 769         memset(tgt->conn_db, 0, tgt->conn_db_mem_size);
 770
 771
 772         /* Allocate and map LCQ */
 773         tgt->lcq_mem_size = (tgt->max_sqes + 8) * BNX2FC_SQ_WQE_SIZE;
 774         tgt->lcq_mem_size = (tgt->lcq_mem_size + (PAGE_SIZE - 1)) &
 775                              PAGE_MASK;
 776
 777         tgt->lcq = dma_alloc_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
 778                                       &tgt->lcq_dma, GFP_KERNEL);
 779
 780         if (!tgt->lcq) {
 781                 printk(KERN_ERR PFX "unable to allocate lcq %d\n",
 782                        tgt->lcq_mem_size);
 783                 goto mem_alloc_failure;
 784         }
 785         memset(tgt->lcq, 0, tgt->lcq_mem_size);
 786
 787         tgt->conn_db->rq_prod = 0x8000;
 788
 789         return 0;
 790
 791 mem_alloc_failure:
 792         return -ENOMEM;
 793 }
 794
 795 /**
 796  * bnx2i_free_session_resc - free qp resources for the session
 797  *
 798  * @hba:        adapter structure pointer
 799  * @tgt:        bnx2fc_rport structure pointer
 800  *
 801  * Free QP resources - SQ/RQ/CQ/XFERQ memory and PBL
 802  */
 803 static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
 804                                                 struct bnx2fc_rport *tgt)
 805 {
 806         void __iomem *ctx_base_ptr;
 807
 808         BNX2FC_TGT_DBG(tgt, "Freeing up session resources\n");
 809
 810         spin_lock_bh(&tgt->cq_lock);
 811         ctx_base_ptr = tgt->ctx_base;
 812         tgt->ctx_base = NULL;
 813
 814         /* Free LCQ */
 815         if (tgt->lcq) {
 816                 dma_free_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
 817                                     tgt->lcq, tgt->lcq_dma);
 818                 tgt->lcq = NULL;
 819         }
 820         /* Free connDB */
 821         if (tgt->conn_db) {
 822                 dma_free_coherent(&hba->pcidev->dev, tgt->conn_db_mem_size,
 823                                     tgt->conn_db, tgt->conn_db_dma);
 824                 tgt->conn_db = NULL;
 825         }
 826         /* Free confq  and confq pbl */
 827         if (tgt->confq_pbl) {
 828                 dma_free_coherent(&hba->pcidev->dev, tgt->confq_pbl_size,
 829                                     tgt->confq_pbl, tgt->confq_pbl_dma);
 830                 tgt->confq_pbl = NULL;
 831         }
 832         if (tgt->confq) {
 833                 dma_free_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
 834                                     tgt->confq, tgt->confq_dma);
 835                 tgt->confq = NULL;
 836         }
 837         /* Free XFERQ */
 838         if (tgt->xferq) {
 839                 dma_free_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
 840                                     tgt->xferq, tgt->xferq_dma);
 841                 tgt->xferq = NULL;
 842         }
 843         /* Free RQ PBL and RQ */
 844         if (tgt->rq_pbl) {
 845                 dma_free_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
 846                                     tgt->rq_pbl, tgt->rq_pbl_dma);
 847                 tgt->rq_pbl = NULL;
 848         }
 849         if (tgt->rq) {
 850                 dma_free_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
 851                                     tgt->rq, tgt->rq_dma);
 852                 tgt->rq = NULL;
 853         }
 854         /* Free CQ */
 855         if (tgt->cq) {
 856                 dma_free_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
 857                                     tgt->cq, tgt->cq_dma);
 858                 tgt->cq = NULL;
 859         }
 860         /* Free SQ */
 861         if (tgt->sq) {
 862                 dma_free_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
 863                                     tgt->sq, tgt->sq_dma);
 864                 tgt->sq = NULL;
 865         }
 866         spin_unlock_bh(&tgt->cq_lock);
 867
 868         if (ctx_base_ptr)
 869                 iounmap(ctx_base_ptr);
 870 }