root/drivers/scsi/bnx2fc/bnx2fc_tgt.c

DEFINITIONS

1. bnx2fc_upld_timer
2. bnx2fc_ofld_timer
3. bnx2fc_ofld_wait
4. bnx2fc_offload_session
5. bnx2fc_flush_active_ios
6. bnx2fc_upld_wait
7. bnx2fc_upload_session
8. bnx2fc_init_tgt
9. bnx2fc_rport_event_handler
10. bnx2fc_tgt_lookup
11. bnx2fc_alloc_conn_id
12. bnx2fc_free_conn_id
13. bnx2fc_alloc_session_resc
14. bnx2fc_free_session_resc

   1 /* bnx2fc_tgt.c: QLogic 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) 2008-2013 Broadcom Corporation
   6  * Copyright (c) 2014-2016 QLogic Corporation
   7  * Copyright (c) 2016-2017 Cavium Inc.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation.
  12  *
  13  * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
  14  */
  15 
  16 #include "bnx2fc.h"
  17 static void bnx2fc_upld_timer(struct timer_list *t);
  18 static void bnx2fc_ofld_timer(struct timer_list *t);
  19 static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
  20                            struct fcoe_port *port,
  21                            struct fc_rport_priv *rdata);
  22 static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
  23                                 struct bnx2fc_rport *tgt);
  24 static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
  25                               struct bnx2fc_rport *tgt);
  26 static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
  27                               struct bnx2fc_rport *tgt);
  28 static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id);
  29 
  30 static void bnx2fc_upld_timer(struct timer_list *t)
  31 {
  32 
  33         struct bnx2fc_rport *tgt = from_timer(tgt, t, upld_timer);
  34 
  35         BNX2FC_TGT_DBG(tgt, "upld_timer - Upload compl not received!!\n");
  36         /* fake upload completion */
  37         clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
  38         clear_bit(BNX2FC_FLAG_ENABLED, &tgt->flags);
  39         set_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
  40         wake_up_interruptible(&tgt->upld_wait);
  41 }
  42 
  43 static void bnx2fc_ofld_timer(struct timer_list *t)
  44 {
  45 
  46         struct bnx2fc_rport *tgt = from_timer(tgt, t, ofld_timer);
  47 
  48         BNX2FC_TGT_DBG(tgt, "entered bnx2fc_ofld_timer\n");
  49         /* NOTE: This function should never be called, as
  50          * offload should never timeout
  51          */
  52         /*
  53          * If the timer has expired, this session is dead
  54          * Clear offloaded flag and logout of this device.
  55          * Since OFFLOADED flag is cleared, this case
  56          * will be considered as offload error and the
  57          * port will be logged off, and conn_id, session
  58          * resources are freed up in bnx2fc_offload_session
  59          */
  60         clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
  61         clear_bit(BNX2FC_FLAG_ENABLED, &tgt->flags);
  62         set_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
  63         wake_up_interruptible(&tgt->ofld_wait);
  64 }
  65 
  66 static void bnx2fc_ofld_wait(struct bnx2fc_rport *tgt)
  67 {
  68         timer_setup(&tgt->ofld_timer, bnx2fc_ofld_timer, 0);
  69         mod_timer(&tgt->ofld_timer, jiffies + BNX2FC_FW_TIMEOUT);
  70 
  71         wait_event_interruptible(tgt->ofld_wait,
  72                                  (test_bit(
  73                                   BNX2FC_FLAG_OFLD_REQ_CMPL,
  74                                   &tgt->flags)));
  75         if (signal_pending(current))
  76                 flush_signals(current);
  77         del_timer_sync(&tgt->ofld_timer);
  78 }
  79 
  80 static void bnx2fc_offload_session(struct fcoe_port *port,
  81                                         struct bnx2fc_rport *tgt,
  82                                         struct fc_rport_priv *rdata)
  83 {
  84         struct fc_rport *rport = rdata->rport;
  85         struct bnx2fc_interface *interface = port->priv;
  86         struct bnx2fc_hba *hba = interface->hba;
  87         int rval;
  88         int i = 0;
  89 
  90         /* Initialize bnx2fc_rport */
  91         /* NOTE: tgt is already bzero'd */
  92         rval = bnx2fc_init_tgt(tgt, port, rdata);
  93         if (rval) {
  94                 printk(KERN_ERR PFX "Failed to allocate conn id for "
  95                         "port_id (%6x)\n", rport->port_id);
  96                 goto tgt_init_err;
  97         }
  98 
  99         /* Allocate session resources */
 100         rval = bnx2fc_alloc_session_resc(hba, tgt);
 101         if (rval) {
 102                 printk(KERN_ERR PFX "Failed to allocate resources\n");
 103                 goto ofld_err;
 104         }
 105 
 106         /*
 107          * Initialize FCoE session offload process.
 108          * Upon completion of offload process add
 109          * rport to list of rports
 110          */
 111 retry_ofld:
 112         clear_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
 113         rval = bnx2fc_send_session_ofld_req(port, tgt);
 114         if (rval) {
 115                 printk(KERN_ERR PFX "ofld_req failed\n");
 116                 goto ofld_err;
 117         }
 118 
 119         /*
 120          * wait for the session is offloaded and enabled. 3 Secs
 121          * should be ample time for this process to complete.
 122          */
 123         bnx2fc_ofld_wait(tgt);
 124 
 125         if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
 126                 if (test_and_clear_bit(BNX2FC_FLAG_CTX_ALLOC_FAILURE,
 127                                        &tgt->flags)) {
 128                         BNX2FC_TGT_DBG(tgt, "ctx_alloc_failure, "
 129                                 "retry ofld..%d\n", i++);
 130                         msleep_interruptible(1000);
 131                         if (i > 3) {
 132                                 i = 0;
 133                                 goto ofld_err;
 134                         }
 135                         goto retry_ofld;
 136                 }
 137                 goto ofld_err;
 138         }
 139         if (bnx2fc_map_doorbell(tgt)) {
 140                 printk(KERN_ERR PFX "map doorbell failed - no mem\n");
 141                 goto ofld_err;
 142         }
 143         clear_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
 144         rval = bnx2fc_send_session_enable_req(port, tgt);
 145         if (rval) {
 146                 pr_err(PFX "enable session failed\n");
 147                 goto ofld_err;
 148         }
 149         bnx2fc_ofld_wait(tgt);
 150         if (!(test_bit(BNX2FC_FLAG_ENABLED, &tgt->flags)))
 151                 goto ofld_err;
 152         return;
 153 
 154 ofld_err:
 155         /* couldn't offload the session. log off from this rport */
 156         BNX2FC_TGT_DBG(tgt, "bnx2fc_offload_session - offload error\n");
 157         clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
 158         /* Free session resources */
 159         bnx2fc_free_session_resc(hba, tgt);
 160 tgt_init_err:
 161         if (tgt->fcoe_conn_id != -1)
 162                 bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
 163         fc_rport_logoff(rdata);
 164 }
 165 
 166 void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
 167 {
 168         struct bnx2fc_cmd *io_req;
 169         struct bnx2fc_cmd *tmp;
 170         int rc;
 171         int i = 0;
 172         BNX2FC_TGT_DBG(tgt, "Entered flush_active_ios - %d\n",
 173                        tgt->num_active_ios.counter);
 174 
 175         spin_lock_bh(&tgt->tgt_lock);
 176         tgt->flush_in_prog = 1;
 177 
 178         list_for_each_entry_safe(io_req, tmp, &tgt->active_cmd_queue, link) {
 179                 i++;
 180                 list_del_init(&io_req->link);
 181                 io_req->on_active_queue = 0;
 182                 BNX2FC_IO_DBG(io_req, "cmd_queue cleanup\n");
 183 
 184                 if (cancel_delayed_work(&io_req->timeout_work)) {
 185                         if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
 186                                                 &io_req->req_flags)) {
 187                                 /* Handle eh_abort timeout */
 188                                 BNX2FC_IO_DBG(io_req, "eh_abort for IO "
 189                                               "cleaned up\n");
 190                                 complete(&io_req->abts_done);
 191                         }
 192                         kref_put(&io_req->refcount,
 193                                  bnx2fc_cmd_release); /* drop timer hold */
 194                 }
 195 
 196                 set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags);
 197                 set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
 198 
 199                 /* Do not issue cleanup when disable request failed */
 200                 if (test_bit(BNX2FC_FLAG_DISABLE_FAILED, &tgt->flags))
 201                         bnx2fc_process_cleanup_compl(io_req, io_req->task, 0);
 202                 else {
 203                         rc = bnx2fc_initiate_cleanup(io_req);
 204                         BUG_ON(rc);
 205                 }
 206         }
 207 
 208         list_for_each_entry_safe(io_req, tmp, &tgt->active_tm_queue, link) {
 209                 i++;
 210                 list_del_init(&io_req->link);
 211                 io_req->on_tmf_queue = 0;
 212                 BNX2FC_IO_DBG(io_req, "tm_queue cleanup\n");
 213                 if (io_req->wait_for_abts_comp)
 214                         complete(&io_req->abts_done);
 215         }
 216 
 217         list_for_each_entry_safe(io_req, tmp, &tgt->els_queue, link) {
 218                 i++;
 219                 list_del_init(&io_req->link);
 220                 io_req->on_active_queue = 0;
 221 
 222                 BNX2FC_IO_DBG(io_req, "els_queue cleanup\n");
 223 
 224                 if (cancel_delayed_work(&io_req->timeout_work))
 225                         kref_put(&io_req->refcount,
 226                                  bnx2fc_cmd_release); /* drop timer hold */
 227 
 228                 if ((io_req->cb_func) && (io_req->cb_arg)) {
 229                         io_req->cb_func(io_req->cb_arg);
 230                         io_req->cb_arg = NULL;
 231                 }
 232 
 233                 /* Do not issue cleanup when disable request failed */
 234                 if (test_bit(BNX2FC_FLAG_DISABLE_FAILED, &tgt->flags))
 235                         bnx2fc_process_cleanup_compl(io_req, io_req->task, 0);
 236                 else {
 237                         rc = bnx2fc_initiate_cleanup(io_req);
 238                         BUG_ON(rc);
 239                 }
 240         }
 241 
 242         list_for_each_entry_safe(io_req, tmp, &tgt->io_retire_queue, link) {
 243                 i++;
 244                 list_del_init(&io_req->link);
 245 
 246                 BNX2FC_IO_DBG(io_req, "retire_queue flush\n");
 247 
 248                 if (cancel_delayed_work(&io_req->timeout_work)) {
 249                         if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
 250                                                 &io_req->req_flags)) {
 251                                 /* Handle eh_abort timeout */
 252                                 BNX2FC_IO_DBG(io_req, "eh_abort for IO "
 253                                               "in retire_q\n");
 254                                 if (io_req->wait_for_abts_comp)
 255                                         complete(&io_req->abts_done);
 256                         }
 257                         kref_put(&io_req->refcount, bnx2fc_cmd_release);
 258                 }
 259 
 260                 clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
 261         }
 262 
 263         BNX2FC_TGT_DBG(tgt, "IOs flushed = %d\n", i);
 264         i = 0;
 265         spin_unlock_bh(&tgt->tgt_lock);
 266         /* wait for active_ios to go to 0 */
 267         while ((tgt->num_active_ios.counter != 0) && (i++ < BNX2FC_WAIT_CNT))
 268                 msleep(25);
 269         if (tgt->num_active_ios.counter != 0)
 270                 printk(KERN_ERR PFX "CLEANUP on port 0x%x:"
 271                                     " active_ios = %d\n",
 272                         tgt->rdata->ids.port_id, tgt->num_active_ios.counter);
 273         spin_lock_bh(&tgt->tgt_lock);
 274         tgt->flush_in_prog = 0;
 275         spin_unlock_bh(&tgt->tgt_lock);
 276 }
 277 
 278 static void bnx2fc_upld_wait(struct bnx2fc_rport *tgt)
 279 {
 280         timer_setup(&tgt->upld_timer, bnx2fc_upld_timer, 0);
 281         mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
 282         wait_event_interruptible(tgt->upld_wait,
 283                                  (test_bit(
 284                                   BNX2FC_FLAG_UPLD_REQ_COMPL,
 285                                   &tgt->flags)));
 286         if (signal_pending(current))
 287                 flush_signals(current);
 288         del_timer_sync(&tgt->upld_timer);
 289 }
 290 
 291 static void bnx2fc_upload_session(struct fcoe_port *port,
 292                                         struct bnx2fc_rport *tgt)
 293 {
 294         struct bnx2fc_interface *interface = port->priv;
 295         struct bnx2fc_hba *hba = interface->hba;
 296 
 297         BNX2FC_TGT_DBG(tgt, "upload_session: active_ios = %d\n",
 298                 tgt->num_active_ios.counter);
 299 
 300         /*
 301          * Called with hba->hba_mutex held.
 302          * This is a blocking call
 303          */
 304         clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
 305         bnx2fc_send_session_disable_req(port, tgt);
 306 
 307         /*
 308          * wait for upload to complete. 3 Secs
 309          * should be sufficient time for this process to complete.
 310          */
 311         BNX2FC_TGT_DBG(tgt, "waiting for disable compl\n");
 312         bnx2fc_upld_wait(tgt);
 313 
 314         /*
 315          * traverse thru the active_q and tmf_q and cleanup
 316          * IOs in these lists
 317          */
 318         BNX2FC_TGT_DBG(tgt, "flush/upload - disable wait flags = 0x%lx\n",
 319                        tgt->flags);
 320         bnx2fc_flush_active_ios(tgt);
 321 
 322         /* Issue destroy KWQE */
 323         if (test_bit(BNX2FC_FLAG_DISABLED, &tgt->flags)) {
 324                 BNX2FC_TGT_DBG(tgt, "send destroy req\n");
 325                 clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
 326                 bnx2fc_send_session_destroy_req(hba, tgt);
 327 
 328                 /* wait for destroy to complete */
 329                 bnx2fc_upld_wait(tgt);
 330 
 331                 if (!(test_bit(BNX2FC_FLAG_DESTROYED, &tgt->flags)))
 332                         printk(KERN_ERR PFX "ERROR!! destroy timed out\n");
 333 
 334                 BNX2FC_TGT_DBG(tgt, "destroy wait complete flags = 0x%lx\n",
 335                         tgt->flags);
 336 
 337         } else if (test_bit(BNX2FC_FLAG_DISABLE_FAILED, &tgt->flags)) {
 338                 printk(KERN_ERR PFX "ERROR!! DISABLE req failed, destroy"
 339                                 " not sent to FW\n");
 340         } else {
 341                 printk(KERN_ERR PFX "ERROR!! DISABLE req timed out, destroy"
 342                                 " not sent to FW\n");
 343         }
 344 
 345         /* Free session resources */
 346         bnx2fc_free_session_resc(hba, tgt);
 347         bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
 348 }
 349 
 350 static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
 351                            struct fcoe_port *port,
 352                            struct fc_rport_priv *rdata)
 353 {
 354 
 355         struct fc_rport *rport = rdata->rport;
 356         struct bnx2fc_interface *interface = port->priv;
 357         struct bnx2fc_hba *hba = interface->hba;
 358         struct b577xx_doorbell_set_prod *sq_db = &tgt->sq_db;
 359         struct b577xx_fcoe_rx_doorbell *rx_db = &tgt->rx_db;
 360 
 361         tgt->rport = rport;
 362         tgt->rdata = rdata;
 363         tgt->port = port;
 364 
 365         if (hba->num_ofld_sess >= BNX2FC_NUM_MAX_SESS) {
 366                 BNX2FC_TGT_DBG(tgt, "exceeded max sessions. logoff this tgt\n");
 367                 tgt->fcoe_conn_id = -1;
 368                 return -1;
 369         }
 370 
 371         tgt->fcoe_conn_id = bnx2fc_alloc_conn_id(hba, tgt);
 372         if (tgt->fcoe_conn_id == -1)
 373                 return -1;
 374 
 375         BNX2FC_TGT_DBG(tgt, "init_tgt - conn_id = 0x%x\n", tgt->fcoe_conn_id);
 376 
 377         tgt->max_sqes = BNX2FC_SQ_WQES_MAX;
 378         tgt->max_rqes = BNX2FC_RQ_WQES_MAX;
 379         tgt->max_cqes = BNX2FC_CQ_WQES_MAX;
 380         atomic_set(&tgt->free_sqes, BNX2FC_SQ_WQES_MAX);
 381 
 382         /* Initialize the toggle bit */
 383         tgt->sq_curr_toggle_bit = 1;
 384         tgt->cq_curr_toggle_bit = 1;
 385         tgt->sq_prod_idx = 0;
 386         tgt->cq_cons_idx = 0;
 387         tgt->rq_prod_idx = 0x8000;
 388         tgt->rq_cons_idx = 0;
 389         atomic_set(&tgt->num_active_ios, 0);
 390         tgt->retry_delay_timestamp = 0;
 391 
 392         if (rdata->flags & FC_RP_FLAGS_RETRY &&
 393             rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET &&
 394             !(rdata->ids.roles & FC_RPORT_ROLE_FCP_INITIATOR)) {
 395                 tgt->dev_type = TYPE_TAPE;
 396                 tgt->io_timeout = 0; /* use default ULP timeout */
 397         } else {
 398                 tgt->dev_type = TYPE_DISK;
 399                 tgt->io_timeout = BNX2FC_IO_TIMEOUT;
 400         }
 401 
 402         /* initialize sq doorbell */
 403         sq_db->header.header = B577XX_DOORBELL_HDR_DB_TYPE;
 404         sq_db->header.header |= B577XX_FCOE_CONNECTION_TYPE <<
 405                                         B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT;
 406         /* initialize rx doorbell */
 407         rx_db->hdr.header = ((0x1 << B577XX_DOORBELL_HDR_RX_SHIFT) |
 408                           (0x1 << B577XX_DOORBELL_HDR_DB_TYPE_SHIFT) |
 409                           (B577XX_FCOE_CONNECTION_TYPE <<
 410                                 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT));
 411         rx_db->params = (0x2 << B577XX_FCOE_RX_DOORBELL_NEGATIVE_ARM_SHIFT) |
 412                      (0x3 << B577XX_FCOE_RX_DOORBELL_OPCODE_SHIFT);
 413 
 414         spin_lock_init(&tgt->tgt_lock);
 415         spin_lock_init(&tgt->cq_lock);
 416 
 417         /* Initialize active_cmd_queue list */
 418         INIT_LIST_HEAD(&tgt->active_cmd_queue);
 419 
 420         /* Initialize IO retire queue */
 421         INIT_LIST_HEAD(&tgt->io_retire_queue);
 422 
 423         INIT_LIST_HEAD(&tgt->els_queue);
 424 
 425         /* Initialize active_tm_queue list */
 426         INIT_LIST_HEAD(&tgt->active_tm_queue);
 427 
 428         init_waitqueue_head(&tgt->ofld_wait);
 429         init_waitqueue_head(&tgt->upld_wait);
 430 
 431         return 0;
 432 }
 433 
 434 /**
 435  * This event_callback is called after successful completion of libfc
 436  * initiated target login. bnx2fc can proceed with initiating the session
 437  * establishment.
 438  */
 439 void bnx2fc_rport_event_handler(struct fc_lport *lport,
 440                                 struct fc_rport_priv *rdata,
 441                                 enum fc_rport_event event)
 442 {
 443         struct fcoe_port *port = lport_priv(lport);
 444         struct bnx2fc_interface *interface = port->priv;
 445         struct bnx2fc_hba *hba = interface->hba;
 446         struct fc_rport *rport = rdata->rport;
 447         struct fc_rport_libfc_priv *rp;
 448         struct bnx2fc_rport *tgt;
 449         u32 port_id;
 450 
 451         BNX2FC_HBA_DBG(lport, "rport_event_hdlr: event = %d, port_id = 0x%x\n",
 452                 event, rdata->ids.port_id);
 453         switch (event) {
 454         case RPORT_EV_READY:
 455                 if (!rport) {
 456                         printk(KERN_ERR PFX "rport is NULL: ERROR!\n");
 457                         break;
 458                 }
 459 
 460                 rp = rport->dd_data;
 461                 if (rport->port_id == FC_FID_DIR_SERV) {
 462                         /*
 463                          * bnx2fc_rport structure doesn't exist for
 464                          * directory server.
 465                          * We should not come here, as lport will
 466                          * take care of fabric login
 467                          */
 468                         printk(KERN_ERR PFX "%x - rport_event_handler ERROR\n",
 469                                 rdata->ids.port_id);
 470                         break;
 471                 }
 472 
 473                 if (rdata->spp_type != FC_TYPE_FCP) {
 474                         BNX2FC_HBA_DBG(lport, "not FCP type target."
 475                                    " not offloading\n");
 476                         break;
 477                 }
 478                 if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
 479                         BNX2FC_HBA_DBG(lport, "not FCP_TARGET"
 480                                    " not offloading\n");
 481                         break;
 482                 }
 483 
 484                 /*
 485                  * Offlaod process is protected with hba mutex.
 486                  * Use the same mutex_lock for upload process too
 487                  */
 488                 mutex_lock(&hba->hba_mutex);
 489                 tgt = (struct bnx2fc_rport *)&rp[1];
 490 
 491                 /* This can happen when ADISC finds the same target */
 492                 if (test_bit(BNX2FC_FLAG_ENABLED, &tgt->flags)) {
 493                         BNX2FC_TGT_DBG(tgt, "already offloaded\n");
 494                         mutex_unlock(&hba->hba_mutex);
 495                         return;
 496                 }
 497 
 498                 /*
 499                  * Offload the session. This is a blocking call, and will
 500                  * wait until the session is offloaded.
 501                  */
 502                 bnx2fc_offload_session(port, tgt, rdata);
 503 
 504                 BNX2FC_TGT_DBG(tgt, "OFFLOAD num_ofld_sess = %d\n",
 505                         hba->num_ofld_sess);
 506 
 507                 if (test_bit(BNX2FC_FLAG_ENABLED, &tgt->flags)) {
 508                         /* Session is offloaded and enabled.  */
 509                         BNX2FC_TGT_DBG(tgt, "sess offloaded\n");
 510                         /* This counter is protected with hba mutex */
 511                         hba->num_ofld_sess++;
 512 
 513                         set_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
 514                 } else {
 515                         /*
 516                          * Offload or enable would have failed.
 517                          * In offload/enable completion path, the
 518                          * rport would have already been removed
 519                          */
 520                         BNX2FC_TGT_DBG(tgt, "Port is being logged off as "
 521                                    "offloaded flag not set\n");
 522                 }
 523                 mutex_unlock(&hba->hba_mutex);
 524                 break;
 525         case RPORT_EV_LOGO:
 526         case RPORT_EV_FAILED:
 527         case RPORT_EV_STOP:
 528                 port_id = rdata->ids.port_id;
 529                 if (port_id == FC_FID_DIR_SERV)
 530                         break;
 531 
 532                 if (!rport) {
 533                         printk(KERN_INFO PFX "%x - rport not created Yet!!\n",
 534                                 port_id);
 535                         break;
 536                 }
 537                 rp = rport->dd_data;
 538                 mutex_lock(&hba->hba_mutex);
 539                 /*
 540                  * Perform session upload. Note that rdata->peers is already
 541                  * removed from disc->rports list before we get this event.
 542                  */
 543                 tgt = (struct bnx2fc_rport *)&rp[1];
 544 
 545                 if (!(test_bit(BNX2FC_FLAG_ENABLED, &tgt->flags))) {
 546                         mutex_unlock(&hba->hba_mutex);
 547                         break;
 548                 }
 549                 clear_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
 550 
 551                 bnx2fc_upload_session(port, tgt);
 552                 hba->num_ofld_sess--;
 553                 BNX2FC_TGT_DBG(tgt, "UPLOAD num_ofld_sess = %d\n",
 554                         hba->num_ofld_sess);
 555                 /*
 556                  * Try to wake up the linkdown wait thread. If num_ofld_sess
 557                  * is 0, the waiting therad wakes up
 558                  */
 559                 if ((hba->wait_for_link_down) &&
 560                     (hba->num_ofld_sess == 0)) {
 561                         wake_up_interruptible(&hba->shutdown_wait);
 562                 }
 563                 mutex_unlock(&hba->hba_mutex);
 564 
 565                 break;
 566 
 567         case RPORT_EV_NONE:
 568                 break;
 569         }
 570 }
 571 
 572 /**
 573  * bnx2fc_tgt_lookup() - Lookup a bnx2fc_rport by port_id
 574  *
 575  * @port:  fcoe_port struct to lookup the target port on
 576  * @port_id: The remote port ID to look up
 577  */
 578 struct bnx2fc_rport *bnx2fc_tgt_lookup(struct fcoe_port *port,
 579                                              u32 port_id)
 580 {
 581         struct bnx2fc_interface *interface = port->priv;
 582         struct bnx2fc_hba *hba = interface->hba;
 583         struct bnx2fc_rport *tgt;
 584         struct fc_rport_priv *rdata;
 585         int i;
 586 
 587         for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
 588                 tgt = hba->tgt_ofld_list[i];
 589                 if ((tgt) && (tgt->port == port)) {
 590                         rdata = tgt->rdata;
 591                         if (rdata->ids.port_id == port_id) {
 592                                 if (rdata->rp_state != RPORT_ST_DELETE) {
 593                                         BNX2FC_TGT_DBG(tgt, "rport "
 594                                                 "obtained\n");
 595                                         return tgt;
 596                                 } else {
 597                                         BNX2FC_TGT_DBG(tgt, "rport 0x%x "
 598                                                 "is in DELETED state\n",
 599                                                 rdata->ids.port_id);
 600                                         return NULL;
 601                                 }
 602                         }
 603                 }
 604         }
 605         return NULL;
 606 }
 607 
 608 
 609 /**
 610  * bnx2fc_alloc_conn_id - allocates FCOE Connection id
 611  *
 612  * @hba:        pointer to adapter structure
 613  * @tgt:        pointer to bnx2fc_rport structure
 614  */
 615 static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
 616                                 struct bnx2fc_rport *tgt)
 617 {
 618         u32 conn_id, next;
 619 
 620         /* called with hba mutex held */
 621 
 622         /*
 623          * tgt_ofld_list access is synchronized using
 624          * both hba mutex and hba lock. Atleast hba mutex or
 625          * hba lock needs to be held for read access.
 626          */
 627 
 628         spin_lock_bh(&hba->hba_lock);
 629         next = hba->next_conn_id;
 630         conn_id = hba->next_conn_id++;
 631         if (hba->next_conn_id == BNX2FC_NUM_MAX_SESS)
 632                 hba->next_conn_id = 0;
 633 
 634         while (hba->tgt_ofld_list[conn_id] != NULL) {
 635                 conn_id++;
 636                 if (conn_id == BNX2FC_NUM_MAX_SESS)
 637                         conn_id = 0;
 638 
 639                 if (conn_id == next) {
 640                         /* No free conn_ids are available */
 641                         spin_unlock_bh(&hba->hba_lock);
 642                         return -1;
 643                 }
 644         }
 645         hba->tgt_ofld_list[conn_id] = tgt;
 646         tgt->fcoe_conn_id = conn_id;
 647         spin_unlock_bh(&hba->hba_lock);
 648         return conn_id;
 649 }
 650 
 651 static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id)
 652 {
 653         /* called with hba mutex held */
 654         spin_lock_bh(&hba->hba_lock);
 655         hba->tgt_ofld_list[conn_id] = NULL;
 656         spin_unlock_bh(&hba->hba_lock);
 657 }
 658 
 659 /**
 660  *bnx2fc_alloc_session_resc - Allocate qp resources for the session
 661  *
 662  */
 663 static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
 664                                         struct bnx2fc_rport *tgt)
 665 {
 666         dma_addr_t page;
 667         int num_pages;
 668         u32 *pbl;
 669 
 670         /* Allocate and map SQ */
 671         tgt->sq_mem_size = tgt->max_sqes * BNX2FC_SQ_WQE_SIZE;
 672         tgt->sq_mem_size = (tgt->sq_mem_size + (CNIC_PAGE_SIZE - 1)) &
 673                            CNIC_PAGE_MASK;
 674 
 675         tgt->sq = dma_alloc_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
 676                                      &tgt->sq_dma, GFP_KERNEL);
 677         if (!tgt->sq) {
 678                 printk(KERN_ERR PFX "unable to allocate SQ memory %d\n",
 679                         tgt->sq_mem_size);
 680                 goto mem_alloc_failure;
 681         }
 682 
 683         /* Allocate and map CQ */
 684         tgt->cq_mem_size = tgt->max_cqes * BNX2FC_CQ_WQE_SIZE;
 685         tgt->cq_mem_size = (tgt->cq_mem_size + (CNIC_PAGE_SIZE - 1)) &
 686                            CNIC_PAGE_MASK;
 687 
 688         tgt->cq = dma_alloc_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
 689                                      &tgt->cq_dma, GFP_KERNEL);
 690         if (!tgt->cq) {
 691                 printk(KERN_ERR PFX "unable to allocate CQ memory %d\n",
 692                         tgt->cq_mem_size);
 693                 goto mem_alloc_failure;
 694         }
 695 
 696         /* Allocate and map RQ and RQ PBL */
 697         tgt->rq_mem_size = tgt->max_rqes * BNX2FC_RQ_WQE_SIZE;
 698         tgt->rq_mem_size = (tgt->rq_mem_size + (CNIC_PAGE_SIZE - 1)) &
 699                            CNIC_PAGE_MASK;
 700 
 701         tgt->rq = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
 702                                      &tgt->rq_dma, GFP_KERNEL);
 703         if (!tgt->rq) {
 704                 printk(KERN_ERR PFX "unable to allocate RQ memory %d\n",
 705                         tgt->rq_mem_size);
 706                 goto mem_alloc_failure;
 707         }
 708 
 709         tgt->rq_pbl_size = (tgt->rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
 710         tgt->rq_pbl_size = (tgt->rq_pbl_size + (CNIC_PAGE_SIZE - 1)) &
 711                            CNIC_PAGE_MASK;
 712 
 713         tgt->rq_pbl = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
 714                                          &tgt->rq_pbl_dma, GFP_KERNEL);
 715         if (!tgt->rq_pbl) {
 716                 printk(KERN_ERR PFX "unable to allocate RQ PBL %d\n",
 717                         tgt->rq_pbl_size);
 718                 goto mem_alloc_failure;
 719         }
 720 
 721         num_pages = tgt->rq_mem_size / CNIC_PAGE_SIZE;
 722         page = tgt->rq_dma;
 723         pbl = (u32 *)tgt->rq_pbl;
 724 
 725         while (num_pages--) {
 726                 *pbl = (u32)page;
 727                 pbl++;
 728                 *pbl = (u32)((u64)page >> 32);
 729                 pbl++;
 730                 page += CNIC_PAGE_SIZE;
 731         }
 732 
 733         /* Allocate and map XFERQ */
 734         tgt->xferq_mem_size = tgt->max_sqes * BNX2FC_XFERQ_WQE_SIZE;
 735         tgt->xferq_mem_size = (tgt->xferq_mem_size + (CNIC_PAGE_SIZE - 1)) &
 736                                CNIC_PAGE_MASK;
 737 
 738         tgt->xferq = dma_alloc_coherent(&hba->pcidev->dev,
 739                                         tgt->xferq_mem_size, &tgt->xferq_dma,
 740                                         GFP_KERNEL);
 741         if (!tgt->xferq) {
 742                 printk(KERN_ERR PFX "unable to allocate XFERQ %d\n",
 743                         tgt->xferq_mem_size);
 744                 goto mem_alloc_failure;
 745         }
 746 
 747         /* Allocate and map CONFQ & CONFQ PBL */
 748         tgt->confq_mem_size = tgt->max_sqes * BNX2FC_CONFQ_WQE_SIZE;
 749         tgt->confq_mem_size = (tgt->confq_mem_size + (CNIC_PAGE_SIZE - 1)) &
 750                                CNIC_PAGE_MASK;
 751 
 752         tgt->confq = dma_alloc_coherent(&hba->pcidev->dev,
 753                                         tgt->confq_mem_size, &tgt->confq_dma,
 754                                         GFP_KERNEL);
 755         if (!tgt->confq) {
 756                 printk(KERN_ERR PFX "unable to allocate CONFQ %d\n",
 757                         tgt->confq_mem_size);
 758                 goto mem_alloc_failure;
 759         }
 760 
 761         tgt->confq_pbl_size =
 762                 (tgt->confq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
 763         tgt->confq_pbl_size =
 764                 (tgt->confq_pbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
 765 
 766         tgt->confq_pbl = dma_alloc_coherent(&hba->pcidev->dev,
 767                                             tgt->confq_pbl_size,
 768                                             &tgt->confq_pbl_dma, GFP_KERNEL);
 769         if (!tgt->confq_pbl) {
 770                 printk(KERN_ERR PFX "unable to allocate CONFQ PBL %d\n",
 771                         tgt->confq_pbl_size);
 772                 goto mem_alloc_failure;
 773         }
 774 
 775         num_pages = tgt->confq_mem_size / CNIC_PAGE_SIZE;
 776         page = tgt->confq_dma;
 777         pbl = (u32 *)tgt->confq_pbl;
 778 
 779         while (num_pages--) {
 780                 *pbl = (u32)page;
 781                 pbl++;
 782                 *pbl = (u32)((u64)page >> 32);
 783                 pbl++;
 784                 page += CNIC_PAGE_SIZE;
 785         }
 786 
 787         /* Allocate and map ConnDB */
 788         tgt->conn_db_mem_size = sizeof(struct fcoe_conn_db);
 789 
 790         tgt->conn_db = dma_alloc_coherent(&hba->pcidev->dev,
 791                                           tgt->conn_db_mem_size,
 792                                           &tgt->conn_db_dma, GFP_KERNEL);
 793         if (!tgt->conn_db) {
 794                 printk(KERN_ERR PFX "unable to allocate conn_db %d\n",
 795                                                 tgt->conn_db_mem_size);
 796                 goto mem_alloc_failure;
 797         }
 798 
 799 
 800         /* Allocate and map LCQ */
 801         tgt->lcq_mem_size = (tgt->max_sqes + 8) * BNX2FC_SQ_WQE_SIZE;
 802         tgt->lcq_mem_size = (tgt->lcq_mem_size + (CNIC_PAGE_SIZE - 1)) &
 803                              CNIC_PAGE_MASK;
 804 
 805         tgt->lcq = dma_alloc_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
 806                                       &tgt->lcq_dma, GFP_KERNEL);
 807 
 808         if (!tgt->lcq) {
 809                 printk(KERN_ERR PFX "unable to allocate lcq %d\n",
 810                        tgt->lcq_mem_size);
 811                 goto mem_alloc_failure;
 812         }
 813 
 814         tgt->conn_db->rq_prod = 0x8000;
 815 
 816         return 0;
 817 
 818 mem_alloc_failure:
 819         return -ENOMEM;
 820 }
 821 
 822 /**
 823  * bnx2i_free_session_resc - free qp resources for the session
 824  *
 825  * @hba:        adapter structure pointer
 826  * @tgt:        bnx2fc_rport structure pointer
 827  *
 828  * Free QP resources - SQ/RQ/CQ/XFERQ memory and PBL
 829  */
 830 static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
 831                                                 struct bnx2fc_rport *tgt)
 832 {
 833         void __iomem *ctx_base_ptr;
 834 
 835         BNX2FC_TGT_DBG(tgt, "Freeing up session resources\n");
 836 
 837         spin_lock_bh(&tgt->cq_lock);
 838         ctx_base_ptr = tgt->ctx_base;
 839         tgt->ctx_base = NULL;
 840 
 841         /* Free LCQ */
 842         if (tgt->lcq) {
 843                 dma_free_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
 844                                     tgt->lcq, tgt->lcq_dma);
 845                 tgt->lcq = NULL;
 846         }
 847         /* Free connDB */
 848         if (tgt->conn_db) {
 849                 dma_free_coherent(&hba->pcidev->dev, tgt->conn_db_mem_size,
 850                                     tgt->conn_db, tgt->conn_db_dma);
 851                 tgt->conn_db = NULL;
 852         }
 853         /* Free confq  and confq pbl */
 854         if (tgt->confq_pbl) {
 855                 dma_free_coherent(&hba->pcidev->dev, tgt->confq_pbl_size,
 856                                     tgt->confq_pbl, tgt->confq_pbl_dma);
 857                 tgt->confq_pbl = NULL;
 858         }
 859         if (tgt->confq) {
 860                 dma_free_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
 861                                     tgt->confq, tgt->confq_dma);
 862                 tgt->confq = NULL;
 863         }
 864         /* Free XFERQ */
 865         if (tgt->xferq) {
 866                 dma_free_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
 867                                     tgt->xferq, tgt->xferq_dma);
 868                 tgt->xferq = NULL;
 869         }
 870         /* Free RQ PBL and RQ */
 871         if (tgt->rq_pbl) {
 872                 dma_free_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
 873                                     tgt->rq_pbl, tgt->rq_pbl_dma);
 874                 tgt->rq_pbl = NULL;
 875         }
 876         if (tgt->rq) {
 877                 dma_free_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
 878                                     tgt->rq, tgt->rq_dma);
 879                 tgt->rq = NULL;
 880         }
 881         /* Free CQ */
 882         if (tgt->cq) {
 883                 dma_free_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
 884                                     tgt->cq, tgt->cq_dma);
 885                 tgt->cq = NULL;
 886         }
 887         /* Free SQ */
 888         if (tgt->sq) {
 889                 dma_free_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
 890                                     tgt->sq, tgt->sq_dma);
 891                 tgt->sq = NULL;
 892         }
 893         spin_unlock_bh(&tgt->cq_lock);
 894 
 895         if (ctx_base_ptr)
 896                 iounmap(ctx_base_ptr);
 897 }