LXR linux/drivers/scsi/bnx2fc/bnx2fc

   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) 2014-2015 QLogic Corporation
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License as published by
  10 * the Free Software Foundation.
  11 *
  12 * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
  13 */
  14
  15#include "bnx2fc.h"
  16static void bnx2fc_upld_timer(unsigned long data);
  17static void bnx2fc_ofld_timer(unsigned long data);
  18static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
  19                           struct fcoe_port *port,
  20                           struct fc_rport_priv *rdata);
  21static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
  22                                struct bnx2fc_rport *tgt);
  23static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
  24                              struct bnx2fc_rport *tgt);
  25static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
  26                              struct bnx2fc_rport *tgt);
  27static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id);
  28
  29static void bnx2fc_upld_timer(unsigned long data)
  30{
  31
  32        struct bnx2fc_rport *tgt = (struct bnx2fc_rport *)data;
  33
  34        BNX2FC_TGT_DBG(tgt, "upld_timer - Upload compl not received!!\n");
  35        /* fake upload completion */
  36        clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
  37        clear_bit(BNX2FC_FLAG_ENABLED, &tgt->flags);
  38        set_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
  39        wake_up_interruptible(&tgt->upld_wait);
  40}
  41
  42static void bnx2fc_ofld_timer(unsigned long data)
  43{
  44
  45        struct bnx2fc_rport *tgt = (struct bnx2fc_rport *)data;
  46
  47        BNX2FC_TGT_DBG(tgt, "entered bnx2fc_ofld_timer\n");
  48        /* NOTE: This function should never be called, as
  49         * offload should never timeout
  50         */
  51        /*
  52         * If the timer has expired, this session is dead
  53         * Clear offloaded flag and logout of this device.
  54         * Since OFFLOADED flag is cleared, this case
  55         * will be considered as offload error and the
  56         * port will be logged off, and conn_id, session
  57         * resources are freed up in bnx2fc_offload_session
  58         */
  59        clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
  60        clear_bit(BNX2FC_FLAG_ENABLED, &tgt->flags);
  61        set_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
  62        wake_up_interruptible(&tgt->ofld_wait);
  63}
  64
  65static void bnx2fc_ofld_wait(struct bnx2fc_rport *tgt)
  66{
  67        setup_timer(&tgt->ofld_timer, bnx2fc_ofld_timer, (unsigned long)tgt);
  68        mod_timer(&tgt->ofld_timer, jiffies + BNX2FC_FW_TIMEOUT);
  69
  70        wait_event_interruptible(tgt->ofld_wait,
  71                                 (test_bit(
  72                                  BNX2FC_FLAG_OFLD_REQ_CMPL,
  73                                  &tgt->flags)));
  74        if (signal_pending(current))
  75                flush_signals(current);
  76        del_timer_sync(&tgt->ofld_timer);
  77}
  78
  79static void bnx2fc_offload_session(struct fcoe_port *port,
  80                                        struct bnx2fc_rport *tgt,
  81                                        struct fc_rport_priv *rdata)
  82{
  83        struct fc_lport *lport = rdata->local_port;
  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         */
 111retry_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
 154ofld_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);
 160tgt_init_err:
 161        if (tgt->fcoe_conn_id != -1)
 162                bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
 163        lport->tt.rport_logoff(rdata);
 164}
 165
 166void 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->tm_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_comp)
 214                        complete(&io_req->tm_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_comp)
 255                                        complete(&io_req->tm_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
 278static void bnx2fc_upld_wait(struct bnx2fc_rport *tgt)
 279{
 280        setup_timer(&tgt->upld_timer, bnx2fc_upld_timer, (unsigned long)tgt);
 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
 291static 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
 350static 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 */
 439void 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 */
 578struct 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 */
 615static 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
 651static 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 */
 663static 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        memset(tgt->sq, 0, tgt->sq_mem_size);
 683
 684        /* Allocate and map CQ */
 685        tgt->cq_mem_size = tgt->max_cqes * BNX2FC_CQ_WQE_SIZE;
 686        tgt->cq_mem_size = (tgt->cq_mem_size + (CNIC_PAGE_SIZE - 1)) &
 687                           CNIC_PAGE_MASK;
 688
 689        tgt->cq = dma_alloc_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
 690                                     &tgt->cq_dma, GFP_KERNEL);
 691        if (!tgt->cq) {
 692                printk(KERN_ERR PFX "unable to allocate CQ memory %d\n",
 693                        tgt->cq_mem_size);
 694                goto mem_alloc_failure;
 695        }
 696        memset(tgt->cq, 0, tgt->cq_mem_size);
 697
 698        /* Allocate and map RQ and RQ PBL */
 699        tgt->rq_mem_size = tgt->max_rqes * BNX2FC_RQ_WQE_SIZE;
 700        tgt->rq_mem_size = (tgt->rq_mem_size + (CNIC_PAGE_SIZE - 1)) &
 701                           CNIC_PAGE_MASK;
 702
 703        tgt->rq = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
 704                                        &tgt->rq_dma, GFP_KERNEL);
 705        if (!tgt->rq) {
 706                printk(KERN_ERR PFX "unable to allocate RQ memory %d\n",
 707                        tgt->rq_mem_size);
 708                goto mem_alloc_failure;
 709        }
 710        memset(tgt->rq, 0, tgt->rq_mem_size);
 711
 712        tgt->rq_pbl_size = (tgt->rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
 713        tgt->rq_pbl_size = (tgt->rq_pbl_size + (CNIC_PAGE_SIZE - 1)) &
 714                           CNIC_PAGE_MASK;
 715
 716        tgt->rq_pbl = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
 717                                         &tgt->rq_pbl_dma, GFP_KERNEL);
 718        if (!tgt->rq_pbl) {
 719                printk(KERN_ERR PFX "unable to allocate RQ PBL %d\n",
 720                        tgt->rq_pbl_size);
 721                goto mem_alloc_failure;
 722        }
 723
 724        memset(tgt->rq_pbl, 0, tgt->rq_pbl_size);
 725        num_pages = tgt->rq_mem_size / CNIC_PAGE_SIZE;
 726        page = tgt->rq_dma;
 727        pbl = (u32 *)tgt->rq_pbl;
 728
 729        while (num_pages--) {
 730                *pbl = (u32)page;
 731                pbl++;
 732                *pbl = (u32)((u64)page >> 32);
 733                pbl++;
 734                page += CNIC_PAGE_SIZE;
 735        }
 736
 737        /* Allocate and map XFERQ */
 738        tgt->xferq_mem_size = tgt->max_sqes * BNX2FC_XFERQ_WQE_SIZE;
 739        tgt->xferq_mem_size = (tgt->xferq_mem_size + (CNIC_PAGE_SIZE - 1)) &
 740                               CNIC_PAGE_MASK;
 741
 742        tgt->xferq = dma_alloc_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
 743                                        &tgt->xferq_dma, GFP_KERNEL);
 744        if (!tgt->xferq) {
 745                printk(KERN_ERR PFX "unable to allocate XFERQ %d\n",
 746                        tgt->xferq_mem_size);
 747                goto mem_alloc_failure;
 748        }
 749        memset(tgt->xferq, 0, tgt->xferq_mem_size);
 750
 751        /* Allocate and map CONFQ & CONFQ PBL */
 752        tgt->confq_mem_size = tgt->max_sqes * BNX2FC_CONFQ_WQE_SIZE;
 753        tgt->confq_mem_size = (tgt->confq_mem_size + (CNIC_PAGE_SIZE - 1)) &
 754                               CNIC_PAGE_MASK;
 755
 756        tgt->confq = dma_alloc_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
 757                                        &tgt->confq_dma, GFP_KERNEL);
 758        if (!tgt->confq) {
 759                printk(KERN_ERR PFX "unable to allocate CONFQ %d\n",
 760                        tgt->confq_mem_size);
 761                goto mem_alloc_failure;
 762        }
 763        memset(tgt->confq, 0, tgt->confq_mem_size);
 764
 765        tgt->confq_pbl_size =
 766                (tgt->confq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
 767        tgt->confq_pbl_size =
 768                (tgt->confq_pbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
 769
 770        tgt->confq_pbl = dma_alloc_coherent(&hba->pcidev->dev,
 771                                            tgt->confq_pbl_size,
 772                                            &tgt->confq_pbl_dma, GFP_KERNEL);
 773        if (!tgt->confq_pbl) {
 774                printk(KERN_ERR PFX "unable to allocate CONFQ PBL %d\n",
 775                        tgt->confq_pbl_size);
 776                goto mem_alloc_failure;
 777        }
 778
 779        memset(tgt->confq_pbl, 0, tgt->confq_pbl_size);
 780        num_pages = tgt->confq_mem_size / CNIC_PAGE_SIZE;
 781        page = tgt->confq_dma;
 782        pbl = (u32 *)tgt->confq_pbl;
 783
 784        while (num_pages--) {
 785                *pbl = (u32)page;
 786                pbl++;
 787                *pbl = (u32)((u64)page >> 32);
 788                pbl++;
 789                page += CNIC_PAGE_SIZE;
 790        }
 791
 792        /* Allocate and map ConnDB */
 793        tgt->conn_db_mem_size = sizeof(struct fcoe_conn_db);
 794
 795        tgt->conn_db = dma_alloc_coherent(&hba->pcidev->dev,
 796                                          tgt->conn_db_mem_size,
 797                                          &tgt->conn_db_dma, GFP_KERNEL);
 798        if (!tgt->conn_db) {
 799                printk(KERN_ERR PFX "unable to allocate conn_db %d\n",
 800                                                tgt->conn_db_mem_size);
 801                goto mem_alloc_failure;
 802        }
 803        memset(tgt->conn_db, 0, tgt->conn_db_mem_size);
 804
 805
 806        /* Allocate and map LCQ */
 807        tgt->lcq_mem_size = (tgt->max_sqes + 8) * BNX2FC_SQ_WQE_SIZE;
 808        tgt->lcq_mem_size = (tgt->lcq_mem_size + (CNIC_PAGE_SIZE - 1)) &
 809                             CNIC_PAGE_MASK;
 810
 811        tgt->lcq = dma_alloc_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
 812                                      &tgt->lcq_dma, GFP_KERNEL);
 813
 814        if (!tgt->lcq) {
 815                printk(KERN_ERR PFX "unable to allocate lcq %d\n",
 816                       tgt->lcq_mem_size);
 817                goto mem_alloc_failure;
 818        }
 819        memset(tgt->lcq, 0, tgt->lcq_mem_size);
 820
 821        tgt->conn_db->rq_prod = 0x8000;
 822
 823        return 0;
 824
 825mem_alloc_failure:
 826        return -ENOMEM;
 827}
 828
 829/**
 830 * bnx2i_free_session_resc - free qp resources for the session
 831 *
 832 * @hba:        adapter structure pointer
 833 * @tgt:        bnx2fc_rport structure pointer
 834 *
 835 * Free QP resources - SQ/RQ/CQ/XFERQ memory and PBL
 836 */
 837static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
 838                                                struct bnx2fc_rport *tgt)
 839{
 840        void __iomem *ctx_base_ptr;
 841
 842        BNX2FC_TGT_DBG(tgt, "Freeing up session resources\n");
 843
 844        spin_lock_bh(&tgt->cq_lock);
 845        ctx_base_ptr = tgt->ctx_base;
 846        tgt->ctx_base = NULL;
 847
 848        /* Free LCQ */
 849        if (tgt->lcq) {
 850                dma_free_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
 851                                    tgt->lcq, tgt->lcq_dma);
 852                tgt->lcq = NULL;
 853        }
 854        /* Free connDB */
 855        if (tgt->conn_db) {
 856                dma_free_coherent(&hba->pcidev->dev, tgt->conn_db_mem_size,
 857                                    tgt->conn_db, tgt->conn_db_dma);
 858                tgt->conn_db = NULL;
 859        }
 860        /* Free confq  and confq pbl */
 861        if (tgt->confq_pbl) {
 862                dma_free_coherent(&hba->pcidev->dev, tgt->confq_pbl_size,
 863                                    tgt->confq_pbl, tgt->confq_pbl_dma);
 864                tgt->confq_pbl = NULL;
 865        }
 866        if (tgt->confq) {
 867                dma_free_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
 868                                    tgt->confq, tgt->confq_dma);
 869                tgt->confq = NULL;
 870        }
 871        /* Free XFERQ */
 872        if (tgt->xferq) {
 873                dma_free_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
 874                                    tgt->xferq, tgt->xferq_dma);
 875                tgt->xferq = NULL;
 876        }
 877        /* Free RQ PBL and RQ */
 878        if (tgt->rq_pbl) {
 879                dma_free_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
 880                                    tgt->rq_pbl, tgt->rq_pbl_dma);
 881                tgt->rq_pbl = NULL;
 882        }
 883        if (tgt->rq) {
 884                dma_free_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
 885                                    tgt->rq, tgt->rq_dma);
 886                tgt->rq = NULL;
 887        }
 888        /* Free CQ */
 889        if (tgt->cq) {
 890                dma_free_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
 891                                    tgt->cq, tgt->cq_dma);
 892                tgt->cq = NULL;
 893        }
 894        /* Free SQ */
 895        if (tgt->sq) {
 896                dma_free_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
 897                                    tgt->sq, tgt->sq_dma);
 898                tgt->sq = NULL;
 899        }
 900        spin_unlock_bh(&tgt->cq_lock);
 901
 902        if (ctx_base_ptr)
 903                iounmap(ctx_base_ptr);
 904}
 905