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->active_tm_queue) {
 189                 i++;
 190                 io_req = (struct bnx2fc_cmd *)list;
 191                 list_del_init(&io_req->link);
 192                 io_req->on_tmf_queue = 0;
 193                 BNX2FC_IO_DBG(io_req, "tm_queue cleanup\n");
 194                 if (io_req->wait_for_comp)
 195                         complete(&io_req->tm_done);
 196         }
 197
 198         list_for_each_safe(list, tmp, &tgt->els_queue) {
 199                 i++;
 200                 io_req = (struct bnx2fc_cmd *)list;
 201                 list_del_init(&io_req->link);
 202                 io_req->on_active_queue = 0;
 203
 204                 BNX2FC_IO_DBG(io_req, "els_queue cleanup\n");
 205
 206                 if (cancel_delayed_work(&io_req->timeout_work))
 207                         kref_put(&io_req->refcount,
 208                                  bnx2fc_cmd_release); /* drop timer hold */
 209
 210                 if ((io_req->cb_func) && (io_req->cb_arg)) {
 211                         io_req->cb_func(io_req->cb_arg);
 212                         io_req->cb_arg = NULL;
 213                 }
 214
 215                 rc = bnx2fc_initiate_cleanup(io_req);
 216                 BUG_ON(rc);
 217         }
 218
 219         list_for_each_safe(list, tmp, &tgt->io_retire_queue) {
 220                 i++;
 221                 io_req = (struct bnx2fc_cmd *)list;
 222                 list_del_init(&io_req->link);
 223
 224                 BNX2FC_IO_DBG(io_req, "retire_queue flush\n");
 225
 226                 if (cancel_delayed_work(&io_req->timeout_work)) {
 227                         if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
 228                                                 &io_req->req_flags)) {
 229                                 /* Handle eh_abort timeout */
 230                                 BNX2FC_IO_DBG(io_req, "eh_abort for IO "
 231                                               "in retire_q\n");
 232                                 if (io_req->wait_for_comp)
 233                                         complete(&io_req->tm_done);
 234                         }
 235                         kref_put(&io_req->refcount, bnx2fc_cmd_release);
 236                 }
 237
 238                 clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
 239         }
 240
 241         BNX2FC_TGT_DBG(tgt, "IOs flushed = %d\n", i);
 242         i = 0;
 243         spin_unlock_bh(&tgt->tgt_lock);
 244         /* wait for active_ios to go to 0 */
 245         while ((tgt->num_active_ios.counter != 0) && (i++ < BNX2FC_WAIT_CNT))
 246                 msleep(25);
 247         if (tgt->num_active_ios.counter != 0)
 248                 printk(KERN_ERR PFX "CLEANUP on port 0x%x:"
 249                                     " active_ios = %d\n",
 250                         tgt->rdata->ids.port_id, tgt->num_active_ios.counter);
 251         spin_lock_bh(&tgt->tgt_lock);
 252         tgt->flush_in_prog = 0;
 253         spin_unlock_bh(&tgt->tgt_lock);
 254 }
 255
 256 static void bnx2fc_upload_session(struct fcoe_port *port,
 257                                         struct bnx2fc_rport *tgt)
 258 {
 259         struct bnx2fc_interface *interface = port->priv;
 260         struct bnx2fc_hba *hba = interface->hba;
 261
 262         BNX2FC_TGT_DBG(tgt, "upload_session: active_ios = %d\n",
 263                 tgt->num_active_ios.counter);
 264
 265         /*
 266          * Called with hba->hba_mutex held.
 267          * This is a blocking call
 268          */
 269         clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
 270         bnx2fc_send_session_disable_req(port, tgt);
 271
 272         /*
 273          * wait for upload to complete. 3 Secs
 274          * should be sufficient time for this process to complete.
 275          */
 276         setup_timer(&tgt->upld_timer, bnx2fc_upld_timer, (unsigned long)tgt);
 277         mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
 278
 279         BNX2FC_TGT_DBG(tgt, "waiting for disable compl\n");
 280         wait_event_interruptible(tgt->upld_wait,
 281                                  (test_bit(
 282                                   BNX2FC_FLAG_UPLD_REQ_COMPL,
 283                                   &tgt->flags)));
 284
 285         if (signal_pending(current))
 286                 flush_signals(current);
 287
 288         del_timer_sync(&tgt->upld_timer);
 289
 290         /*
 291          * traverse thru the active_q and tmf_q and cleanup
 292          * IOs in these lists
 293          */
 294         BNX2FC_TGT_DBG(tgt, "flush/upload - disable wait flags = 0x%lx\n",
 295                        tgt->flags);
 296         bnx2fc_flush_active_ios(tgt);
 297
 298         /* Issue destroy KWQE */
 299         if (test_bit(BNX2FC_FLAG_DISABLED, &tgt->flags)) {
 300                 BNX2FC_TGT_DBG(tgt, "send destroy req\n");
 301                 clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
 302                 bnx2fc_send_session_destroy_req(hba, tgt);
 303
 304                 /* wait for destroy to complete */
 305                 setup_timer(&tgt->upld_timer,
 306                             bnx2fc_upld_timer, (unsigned long)tgt);
 307                 mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
 308
 309                 wait_event_interruptible(tgt->upld_wait,
 310                                          (test_bit(
 311                                           BNX2FC_FLAG_UPLD_REQ_COMPL,
 312                                           &tgt->flags)));
 313
 314                 if (!(test_bit(BNX2FC_FLAG_DESTROYED, &tgt->flags)))
 315                         printk(KERN_ERR PFX "ERROR!! destroy timed out\n");
 316
 317                 BNX2FC_TGT_DBG(tgt, "destroy wait complete flags = 0x%lx\n",
 318                         tgt->flags);
 319                 if (signal_pending(current))
 320                         flush_signals(current);
 321
 322                 del_timer_sync(&tgt->upld_timer);
 323
 324         } else
 325                 printk(KERN_ERR PFX "ERROR!! DISABLE req timed out, destroy"
 326                                 " not sent to FW\n");
 327
 328         /* Free session resources */
 329         bnx2fc_free_session_resc(hba, tgt);
 330         bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
 331 }
 332
 333 static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
 334                            struct fcoe_port *port,
 335                            struct fc_rport_priv *rdata)
 336 {
 337
 338         struct fc_rport *rport = rdata->rport;
 339         struct bnx2fc_interface *interface = port->priv;
 340         struct bnx2fc_hba *hba = interface->hba;
 341         struct b577xx_doorbell_set_prod *sq_db = &tgt->sq_db;
 342         struct b577xx_fcoe_rx_doorbell *rx_db = &tgt->rx_db;
 343
 344         tgt->rport = rport;
 345         tgt->rdata = rdata;
 346         tgt->port = port;
 347
 348         if (hba->num_ofld_sess >= BNX2FC_NUM_MAX_SESS) {
 349                 BNX2FC_TGT_DBG(tgt, "exceeded max sessions. logoff this tgt\n");
 350                 tgt->fcoe_conn_id = -1;
 351                 return -1;
 352         }
 353
 354         tgt->fcoe_conn_id = bnx2fc_alloc_conn_id(hba, tgt);
 355         if (tgt->fcoe_conn_id == -1)
 356                 return -1;
 357
 358         BNX2FC_TGT_DBG(tgt, "init_tgt - conn_id = 0x%x\n", tgt->fcoe_conn_id);
 359
 360         tgt->max_sqes = BNX2FC_SQ_WQES_MAX;
 361         tgt->max_rqes = BNX2FC_RQ_WQES_MAX;
 362         tgt->max_cqes = BNX2FC_CQ_WQES_MAX;
 363         atomic_set(&tgt->free_sqes, BNX2FC_SQ_WQES_MAX);
 364
 365         /* Initialize the toggle bit */
 366         tgt->sq_curr_toggle_bit = 1;
 367         tgt->cq_curr_toggle_bit = 1;
 368         tgt->sq_prod_idx = 0;
 369         tgt->cq_cons_idx = 0;
 370         tgt->rq_prod_idx = 0x8000;
 371         tgt->rq_cons_idx = 0;
 372         atomic_set(&tgt->num_active_ios, 0);
 373
 374         if (rdata->flags & FC_RP_FLAGS_RETRY) {
 375                 tgt->dev_type = TYPE_TAPE;
 376                 tgt->io_timeout = 0; /* use default ULP timeout */
 377         } else {
 378                 tgt->dev_type = TYPE_DISK;
 379                 tgt->io_timeout = BNX2FC_IO_TIMEOUT;
 380         }
 381
 382         /* initialize sq doorbell */
 383         sq_db->header.header = B577XX_DOORBELL_HDR_DB_TYPE;
 384         sq_db->header.header |= B577XX_FCOE_CONNECTION_TYPE <<
 385                                         B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT;
 386         /* initialize rx doorbell */
 387         rx_db->hdr.header = ((0x1 << B577XX_DOORBELL_HDR_RX_SHIFT) |
 388                           (0x1 << B577XX_DOORBELL_HDR_DB_TYPE_SHIFT) |
 389                           (B577XX_FCOE_CONNECTION_TYPE <<
 390                                 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT));
 391         rx_db->params = (0x2 << B577XX_FCOE_RX_DOORBELL_NEGATIVE_ARM_SHIFT) |
 392                      (0x3 << B577XX_FCOE_RX_DOORBELL_OPCODE_SHIFT);
 393
 394         spin_lock_init(&tgt->tgt_lock);
 395         spin_lock_init(&tgt->cq_lock);
 396
 397         /* Initialize active_cmd_queue list */
 398         INIT_LIST_HEAD(&tgt->active_cmd_queue);
 399
 400         /* Initialize IO retire queue */
 401         INIT_LIST_HEAD(&tgt->io_retire_queue);
 402
 403         INIT_LIST_HEAD(&tgt->els_queue);
 404
 405         /* Initialize active_tm_queue list */
 406         INIT_LIST_HEAD(&tgt->active_tm_queue);
 407
 408         init_waitqueue_head(&tgt->ofld_wait);
 409         init_waitqueue_head(&tgt->upld_wait);
 410
 411         return 0;
 412 }
 413
 414 /**
 415  * This event_callback is called after successful completion of libfc
 416  * initiated target login. bnx2fc can proceed with initiating the session
 417  * establishment.
 418  */
 419 void bnx2fc_rport_event_handler(struct fc_lport *lport,
 420                                 struct fc_rport_priv *rdata,
 421                                 enum fc_rport_event event)
 422 {
 423         struct fcoe_port *port = lport_priv(lport);
 424         struct bnx2fc_interface *interface = port->priv;
 425         struct bnx2fc_hba *hba = interface->hba;
 426         struct fc_rport *rport = rdata->rport;
 427         struct fc_rport_libfc_priv *rp;
 428         struct bnx2fc_rport *tgt;
 429         u32 port_id;
 430
 431         BNX2FC_HBA_DBG(lport, "rport_event_hdlr: event = %d, port_id = 0x%x\n",
 432                 event, rdata->ids.port_id);
 433         switch (event) {
 434         case RPORT_EV_READY:
 435                 if (!rport) {
 436                         printk(KERN_ERR PFX "rport is NULL: ERROR!\n");
 437                         break;
 438                 }
 439
 440                 rp = rport->dd_data;
 441                 if (rport->port_id == FC_FID_DIR_SERV) {
 442                         /*
 443                          * bnx2fc_rport structure doesn't exist for
 444                          * directory server.
 445                          * We should not come here, as lport will
 446                          * take care of fabric login
 447                          */
 448                         printk(KERN_ERR PFX "%x - rport_event_handler ERROR\n",
 449                                 rdata->ids.port_id);
 450                         break;
 451                 }
 452
 453                 if (rdata->spp_type != FC_TYPE_FCP) {
 454                         BNX2FC_HBA_DBG(lport, "not FCP type target."
 455                                    " not offloading\n");
 456                         break;
 457                 }
 458                 if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
 459                         BNX2FC_HBA_DBG(lport, "not FCP_TARGET"
 460                                    " not offloading\n");
 461                         break;
 462                 }
 463
 464                 /*
 465                  * Offlaod process is protected with hba mutex.
 466                  * Use the same mutex_lock for upload process too
 467                  */
 468                 mutex_lock(&hba->hba_mutex);
 469                 tgt = (struct bnx2fc_rport *)&rp[1];
 470
 471                 /* This can happen when ADISC finds the same target */
 472                 if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
 473                         BNX2FC_TGT_DBG(tgt, "already offloaded\n");
 474                         mutex_unlock(&hba->hba_mutex);
 475                         return;
 476                 }
 477
 478                 /*
 479                  * Offload the session. This is a blocking call, and will
 480                  * wait until the session is offloaded.
 481                  */
 482                 bnx2fc_offload_session(port, tgt, rdata);
 483
 484                 BNX2FC_TGT_DBG(tgt, "OFFLOAD num_ofld_sess = %d\n",
 485                         hba->num_ofld_sess);
 486
 487                 if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
 488                         /*
 489                          * Session is offloaded and enabled. Map
 490                          * doorbell register for this target
 491                          */
 492                         BNX2FC_TGT_DBG(tgt, "sess offloaded\n");
 493                         /* This counter is protected with hba mutex */
 494                         hba->num_ofld_sess++;
 495
 496                         set_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
 497                 } else {
 498                         /*
 499                          * Offload or enable would have failed.
 500                          * In offload/enable completion path, the
 501                          * rport would have already been removed
 502                          */
 503                         BNX2FC_TGT_DBG(tgt, "Port is being logged off as "
 504                                    "offloaded flag not set\n");
 505                 }
 506                 mutex_unlock(&hba->hba_mutex);
 507                 break;
 508         case RPORT_EV_LOGO:
 509         case RPORT_EV_FAILED:
 510         case RPORT_EV_STOP:
 511                 port_id = rdata->ids.port_id;
 512                 if (port_id == FC_FID_DIR_SERV)
 513                         break;
 514
 515                 if (!rport) {
 516                         printk(KERN_INFO PFX "%x - rport not created Yet!!\n",
 517                                 port_id);
 518                         break;
 519                 }
 520                 rp = rport->dd_data;
 521                 mutex_lock(&hba->hba_mutex);
 522                 /*
 523                  * Perform session upload. Note that rdata->peers is already
 524                  * removed from disc->rports list before we get this event.
 525                  */
 526                 tgt = (struct bnx2fc_rport *)&rp[1];
 527
 528                 if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
 529                         mutex_unlock(&hba->hba_mutex);
 530                         break;
 531                 }
 532                 clear_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
 533
 534                 bnx2fc_upload_session(port, tgt);
 535                 hba->num_ofld_sess--;
 536                 BNX2FC_TGT_DBG(tgt, "UPLOAD num_ofld_sess = %d\n",
 537                         hba->num_ofld_sess);
 538                 /*
 539                  * Try to wake up the linkdown wait thread. If num_ofld_sess
 540                  * is 0, the waiting therad wakes up
 541                  */
 542                 if ((hba->wait_for_link_down) &&
 543                     (hba->num_ofld_sess == 0)) {
 544                         wake_up_interruptible(&hba->shutdown_wait);
 545                 }
 546                 if (test_bit(BNX2FC_FLAG_EXPL_LOGO, &tgt->flags)) {
 547                         printk(KERN_ERR PFX "Relogin to the tgt\n");
 548                         mutex_lock(&lport->disc.disc_mutex);
 549                         lport->tt.rport_login(rdata);
 550                         mutex_unlock(&lport->disc.disc_mutex);
 551                 }
 552                 mutex_unlock(&hba->hba_mutex);
 553
 554                 break;
 555
 556         case RPORT_EV_NONE:
 557                 break;
 558         }
 559 }
 560
 561 /**
 562  * bnx2fc_tgt_lookup() - Lookup a bnx2fc_rport by port_id
 563  *
 564  * @port:  fcoe_port struct to lookup the target port on
 565  * @port_id: The remote port ID to look up
 566  */
 567 struct bnx2fc_rport *bnx2fc_tgt_lookup(struct fcoe_port *port,
 568                                              u32 port_id)
 569 {
 570         struct bnx2fc_interface *interface = port->priv;
 571         struct bnx2fc_hba *hba = interface->hba;
 572         struct bnx2fc_rport *tgt;
 573         struct fc_rport_priv *rdata;
 574         int i;
 575
 576         for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
 577                 tgt = hba->tgt_ofld_list[i];
 578                 if ((tgt) && (tgt->port == port)) {
 579                         rdata = tgt->rdata;
 580                         if (rdata->ids.port_id == port_id) {
 581                                 if (rdata->rp_state != RPORT_ST_DELETE) {
 582                                         BNX2FC_TGT_DBG(tgt, "rport "
 583                                                 "obtained\n");
 584                                         return tgt;
 585                                 } else {
 586                                         BNX2FC_TGT_DBG(tgt, "rport 0x%x "
 587                                                 "is in DELETED state\n",
 588                                                 rdata->ids.port_id);
 589                                         return NULL;
 590                                 }
 591                         }
 592                 }
 593         }
 594         return NULL;
 595 }
 596
 597
 598 /**
 599  * bnx2fc_alloc_conn_id - allocates FCOE Connection id
 600  *
 601  * @hba:        pointer to adapter structure
 602  * @tgt:        pointer to bnx2fc_rport structure
 603  */
 604 static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
 605                                 struct bnx2fc_rport *tgt)
 606 {
 607         u32 conn_id, next;
 608
 609         /* called with hba mutex held */
 610
 611         /*
 612          * tgt_ofld_list access is synchronized using
 613          * both hba mutex and hba lock. Atleast hba mutex or
 614          * hba lock needs to be held for read access.
 615          */
 616
 617         spin_lock_bh(&hba->hba_lock);
 618         next = hba->next_conn_id;
 619         conn_id = hba->next_conn_id++;
 620         if (hba->next_conn_id == BNX2FC_NUM_MAX_SESS)
 621                 hba->next_conn_id = 0;
 622
 623         while (hba->tgt_ofld_list[conn_id] != NULL) {
 624                 conn_id++;
 625                 if (conn_id == BNX2FC_NUM_MAX_SESS)
 626                         conn_id = 0;
 627
 628                 if (conn_id == next) {
 629                         /* No free conn_ids are available */
 630                         spin_unlock_bh(&hba->hba_lock);
 631                         return -1;
 632                 }
 633         }
 634         hba->tgt_ofld_list[conn_id] = tgt;
 635         tgt->fcoe_conn_id = conn_id;
 636         spin_unlock_bh(&hba->hba_lock);
 637         return conn_id;
 638 }
 639
 640 static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id)
 641 {
 642         /* called with hba mutex held */
 643         spin_lock_bh(&hba->hba_lock);
 644         hba->tgt_ofld_list[conn_id] = NULL;
 645         spin_unlock_bh(&hba->hba_lock);
 646 }
 647
 648 /**
 649  *bnx2fc_alloc_session_resc - Allocate qp resources for the session
 650  *
 651  */
 652 static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
 653                                         struct bnx2fc_rport *tgt)
 654 {
 655         dma_addr_t page;
 656         int num_pages;
 657         u32 *pbl;
 658
 659         /* Allocate and map SQ */
 660         tgt->sq_mem_size = tgt->max_sqes * BNX2FC_SQ_WQE_SIZE;
 661         tgt->sq_mem_size = (tgt->sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 662
 663         tgt->sq = dma_alloc_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
 664                                      &tgt->sq_dma, GFP_KERNEL);
 665         if (!tgt->sq) {
 666                 printk(KERN_ERR PFX "unable to allocate SQ memory %d\n",
 667                         tgt->sq_mem_size);
 668                 goto mem_alloc_failure;
 669         }
 670         memset(tgt->sq, 0, tgt->sq_mem_size);
 671
 672         /* Allocate and map CQ */
 673         tgt->cq_mem_size = tgt->max_cqes * BNX2FC_CQ_WQE_SIZE;
 674         tgt->cq_mem_size = (tgt->cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 675
 676         tgt->cq = dma_alloc_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
 677                                      &tgt->cq_dma, GFP_KERNEL);
 678         if (!tgt->cq) {
 679                 printk(KERN_ERR PFX "unable to allocate CQ memory %d\n",
 680                         tgt->cq_mem_size);
 681                 goto mem_alloc_failure;
 682         }
 683         memset(tgt->cq, 0, tgt->cq_mem_size);
 684
 685         /* Allocate and map RQ and RQ PBL */
 686         tgt->rq_mem_size = tgt->max_rqes * BNX2FC_RQ_WQE_SIZE;
 687         tgt->rq_mem_size = (tgt->rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 688
 689         tgt->rq = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
 690                                         &tgt->rq_dma, GFP_KERNEL);
 691         if (!tgt->rq) {
 692                 printk(KERN_ERR PFX "unable to allocate RQ memory %d\n",
 693                         tgt->rq_mem_size);
 694                 goto mem_alloc_failure;
 695         }
 696         memset(tgt->rq, 0, tgt->rq_mem_size);
 697
 698         tgt->rq_pbl_size = (tgt->rq_mem_size / PAGE_SIZE) * sizeof(void *);
 699         tgt->rq_pbl_size = (tgt->rq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 700
 701         tgt->rq_pbl = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
 702                                          &tgt->rq_pbl_dma, GFP_KERNEL);
 703         if (!tgt->rq_pbl) {
 704                 printk(KERN_ERR PFX "unable to allocate RQ PBL %d\n",
 705                         tgt->rq_pbl_size);
 706                 goto mem_alloc_failure;
 707         }
 708
 709         memset(tgt->rq_pbl, 0, tgt->rq_pbl_size);
 710         num_pages = tgt->rq_mem_size / PAGE_SIZE;
 711         page = tgt->rq_dma;
 712         pbl = (u32 *)tgt->rq_pbl;
 713
 714         while (num_pages--) {
 715                 *pbl = (u32)page;
 716                 pbl++;
 717                 *pbl = (u32)((u64)page >> 32);
 718                 pbl++;
 719                 page += PAGE_SIZE;
 720         }
 721
 722         /* Allocate and map XFERQ */
 723         tgt->xferq_mem_size = tgt->max_sqes * BNX2FC_XFERQ_WQE_SIZE;
 724         tgt->xferq_mem_size = (tgt->xferq_mem_size + (PAGE_SIZE - 1)) &
 725                                PAGE_MASK;
 726
 727         tgt->xferq = dma_alloc_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
 728                                         &tgt->xferq_dma, GFP_KERNEL);
 729         if (!tgt->xferq) {
 730                 printk(KERN_ERR PFX "unable to allocate XFERQ %d\n",
 731                         tgt->xferq_mem_size);
 732                 goto mem_alloc_failure;
 733         }
 734         memset(tgt->xferq, 0, tgt->xferq_mem_size);
 735
 736         /* Allocate and map CONFQ & CONFQ PBL */
 737         tgt->confq_mem_size = tgt->max_sqes * BNX2FC_CONFQ_WQE_SIZE;
 738         tgt->confq_mem_size = (tgt->confq_mem_size + (PAGE_SIZE - 1)) &
 739                                PAGE_MASK;
 740
 741         tgt->confq = dma_alloc_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
 742                                         &tgt->confq_dma, GFP_KERNEL);
 743         if (!tgt->confq) {
 744                 printk(KERN_ERR PFX "unable to allocate CONFQ %d\n",
 745                         tgt->confq_mem_size);
 746                 goto mem_alloc_failure;
 747         }
 748         memset(tgt->confq, 0, tgt->confq_mem_size);
 749
 750         tgt->confq_pbl_size =
 751                 (tgt->confq_mem_size / PAGE_SIZE) * sizeof(void *);
 752         tgt->confq_pbl_size =
 753                 (tgt->confq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
 754
 755         tgt->confq_pbl = dma_alloc_coherent(&hba->pcidev->dev,
 756                                             tgt->confq_pbl_size,
 757                                             &tgt->confq_pbl_dma, GFP_KERNEL);
 758         if (!tgt->confq_pbl) {
 759                 printk(KERN_ERR PFX "unable to allocate CONFQ PBL %d\n",
 760                         tgt->confq_pbl_size);
 761                 goto mem_alloc_failure;
 762         }
 763
 764         memset(tgt->confq_pbl, 0, tgt->confq_pbl_size);
 765         num_pages = tgt->confq_mem_size / PAGE_SIZE;
 766         page = tgt->confq_dma;
 767         pbl = (u32 *)tgt->confq_pbl;
 768
 769         while (num_pages--) {
 770                 *pbl = (u32)page;
 771                 pbl++;
 772                 *pbl = (u32)((u64)page >> 32);
 773                 pbl++;
 774                 page += PAGE_SIZE;
 775         }
 776
 777         /* Allocate and map ConnDB */
 778         tgt->conn_db_mem_size = sizeof(struct fcoe_conn_db);
 779
 780         tgt->conn_db = dma_alloc_coherent(&hba->pcidev->dev,
 781                                           tgt->conn_db_mem_size,
 782                                           &tgt->conn_db_dma, GFP_KERNEL);
 783         if (!tgt->conn_db) {
 784                 printk(KERN_ERR PFX "unable to allocate conn_db %d\n",
 785                                                 tgt->conn_db_mem_size);
 786                 goto mem_alloc_failure;
 787         }
 788         memset(tgt->conn_db, 0, tgt->conn_db_mem_size);
 789
 790
 791         /* Allocate and map LCQ */
 792         tgt->lcq_mem_size = (tgt->max_sqes + 8) * BNX2FC_SQ_WQE_SIZE;
 793         tgt->lcq_mem_size = (tgt->lcq_mem_size + (PAGE_SIZE - 1)) &
 794                              PAGE_MASK;
 795
 796         tgt->lcq = dma_alloc_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
 797                                       &tgt->lcq_dma, GFP_KERNEL);
 798
 799         if (!tgt->lcq) {
 800                 printk(KERN_ERR PFX "unable to allocate lcq %d\n",
 801                        tgt->lcq_mem_size);
 802                 goto mem_alloc_failure;
 803         }
 804         memset(tgt->lcq, 0, tgt->lcq_mem_size);
 805
 806         tgt->conn_db->rq_prod = 0x8000;
 807
 808         return 0;
 809
 810 mem_alloc_failure:
 811         return -ENOMEM;
 812 }
 813
 814 /**
 815  * bnx2i_free_session_resc - free qp resources for the session
 816  *
 817  * @hba:        adapter structure pointer
 818  * @tgt:        bnx2fc_rport structure pointer
 819  *
 820  * Free QP resources - SQ/RQ/CQ/XFERQ memory and PBL
 821  */
 822 static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
 823                                                 struct bnx2fc_rport *tgt)
 824 {
 825         void __iomem *ctx_base_ptr;
 826
 827         BNX2FC_TGT_DBG(tgt, "Freeing up session resources\n");
 828
 829         spin_lock_bh(&tgt->cq_lock);
 830         ctx_base_ptr = tgt->ctx_base;
 831         tgt->ctx_base = NULL;
 832
 833         /* Free LCQ */
 834         if (tgt->lcq) {
 835                 dma_free_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
 836                                     tgt->lcq, tgt->lcq_dma);
 837                 tgt->lcq = NULL;
 838         }
 839         /* Free connDB */
 840         if (tgt->conn_db) {
 841                 dma_free_coherent(&hba->pcidev->dev, tgt->conn_db_mem_size,
 842                                     tgt->conn_db, tgt->conn_db_dma);
 843                 tgt->conn_db = NULL;
 844         }
 845         /* Free confq  and confq pbl */
 846         if (tgt->confq_pbl) {
 847                 dma_free_coherent(&hba->pcidev->dev, tgt->confq_pbl_size,
 848                                     tgt->confq_pbl, tgt->confq_pbl_dma);
 849                 tgt->confq_pbl = NULL;
 850         }
 851         if (tgt->confq) {
 852                 dma_free_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
 853                                     tgt->confq, tgt->confq_dma);
 854                 tgt->confq = NULL;
 855         }
 856         /* Free XFERQ */
 857         if (tgt->xferq) {
 858                 dma_free_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
 859                                     tgt->xferq, tgt->xferq_dma);
 860                 tgt->xferq = NULL;
 861         }
 862         /* Free RQ PBL and RQ */
 863         if (tgt->rq_pbl) {
 864                 dma_free_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
 865                                     tgt->rq_pbl, tgt->rq_pbl_dma);
 866                 tgt->rq_pbl = NULL;
 867         }
 868         if (tgt->rq) {
 869                 dma_free_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
 870                                     tgt->rq, tgt->rq_dma);
 871                 tgt->rq = NULL;
 872         }
 873         /* Free CQ */
 874         if (tgt->cq) {
 875                 dma_free_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
 876                                     tgt->cq, tgt->cq_dma);
 877                 tgt->cq = NULL;
 878         }
 879         /* Free SQ */
 880         if (tgt->sq) {
 881                 dma_free_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
 882                                     tgt->sq, tgt->sq_dma);
 883                 tgt->sq = NULL;
 884         }
 885         spin_unlock_bh(&tgt->cq_lock);
 886
 887         if (ctx_base_ptr)
 888                 iounmap(ctx_base_ptr);
 889 }