release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/scsi/qla2xxx/qla_mid.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2010 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8 #include "qla_gbl.h"
   9
  10 #include <linux/moduleparam.h>
  11 #include <linux/vmalloc.h>
  12 #include <linux/slab.h>
  13 #include <linux/list.h>
  14
  15 #include <scsi/scsi_tcq.h>
  16 #include <scsi/scsicam.h>
  17 #include <linux/delay.h>
  18
  19 void
  20 qla2x00_vp_stop_timer(scsi_qla_host_t *vha)
  21 {
  22         if (vha->vp_idx && vha->timer_active) {
  23                 del_timer_sync(&vha->timer);
  24                 vha->timer_active = 0;
  25         }
  26 }
  27
  28 static uint32_t
  29 qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
  30 {
  31         uint32_t vp_id;
  32         struct qla_hw_data *ha = vha->hw;
  33         unsigned long flags;
  34
  35         /* Find an empty slot and assign an vp_id */
  36         mutex_lock(&ha->vport_lock);
  37         vp_id = find_first_zero_bit(ha->vp_idx_map, ha->max_npiv_vports + 1);
  38         if (vp_id > ha->max_npiv_vports) {
  39                 DEBUG15(printk ("vp_id %d is bigger than max-supported %d.\n",
  40                     vp_id, ha->max_npiv_vports));
  41                 mutex_unlock(&ha->vport_lock);
  42                 return vp_id;
  43         }
  44
  45         set_bit(vp_id, ha->vp_idx_map);
  46         ha->num_vhosts++;
  47         vha->vp_idx = vp_id;
  48
  49         spin_lock_irqsave(&ha->vport_slock, flags);
  50         list_add_tail(&vha->list, &ha->vp_list);
  51         spin_unlock_irqrestore(&ha->vport_slock, flags);
  52
  53         mutex_unlock(&ha->vport_lock);
  54         return vp_id;
  55 }
  56
  57 void
  58 qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
  59 {
  60         uint16_t vp_id;
  61         struct qla_hw_data *ha = vha->hw;
  62         unsigned long flags = 0;
  63
  64         mutex_lock(&ha->vport_lock);
  65         /*
  66          * Wait for all pending activities to finish before removing vport from
  67          * the list.
  68          * Lock needs to be held for safe removal from the list (it
  69          * ensures no active vp_list traversal while the vport is removed
  70          * from the queue)
  71          */
  72         spin_lock_irqsave(&ha->vport_slock, flags);
  73         while (atomic_read(&vha->vref_count)) {
  74                 spin_unlock_irqrestore(&ha->vport_slock, flags);
  75
  76                 msleep(500);
  77
  78                 spin_lock_irqsave(&ha->vport_slock, flags);
  79         }
  80         list_del(&vha->list);
  81         spin_unlock_irqrestore(&ha->vport_slock, flags);
  82
  83         vp_id = vha->vp_idx;
  84         ha->num_vhosts--;
  85         clear_bit(vp_id, ha->vp_idx_map);
  86
  87         mutex_unlock(&ha->vport_lock);
  88 }
  89
  90 static scsi_qla_host_t *
  91 qla24xx_find_vhost_by_name(struct qla_hw_data *ha, uint8_t *port_name)
  92 {
  93         scsi_qla_host_t *vha;
  94         struct scsi_qla_host *tvha;
  95         unsigned long flags;
  96
  97         spin_lock_irqsave(&ha->vport_slock, flags);
  98         /* Locate matching device in database. */
  99         list_for_each_entry_safe(vha, tvha, &ha->vp_list, list) {
 100                 if (!memcmp(port_name, vha->port_name, WWN_SIZE)) {
 101                         spin_unlock_irqrestore(&ha->vport_slock, flags);
 102                         return vha;
 103                 }
 104         }
 105         spin_unlock_irqrestore(&ha->vport_slock, flags);
 106         return NULL;
 107 }
 108
 109 /*
 110  * qla2x00_mark_vp_devices_dead
 111  *      Updates fcport state when device goes offline.
 112  *
 113  * Input:
 114  *      ha = adapter block pointer.
 115  *      fcport = port structure pointer.
 116  *
 117  * Return:
 118  *      None.
 119  *
 120  * Context:
 121  */
 122 static void
 123 qla2x00_mark_vp_devices_dead(scsi_qla_host_t *vha)
 124 {
 125         /*
 126          * !!! NOTE !!!
 127          * This function, if called in contexts other than vp create, disable
 128          * or delete, please make sure this is synchronized with the
 129          * delete thread.
 130          */
 131         fc_port_t *fcport;
 132
 133         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 134                 DEBUG15(printk("scsi(%ld): Marking port dead, "
 135                     "loop_id=0x%04x :%x\n",
 136                     vha->host_no, fcport->loop_id, fcport->vp_idx));
 137
 138                 qla2x00_mark_device_lost(vha, fcport, 0, 0);
 139                 atomic_set(&fcport->state, FCS_UNCONFIGURED);
 140         }
 141 }
 142
 143 int
 144 qla24xx_disable_vp(scsi_qla_host_t *vha)
 145 {
 146         int ret;
 147
 148         ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 149         atomic_set(&vha->loop_state, LOOP_DOWN);
 150         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 151
 152         qla2x00_mark_vp_devices_dead(vha);
 153         atomic_set(&vha->vp_state, VP_FAILED);
 154         vha->flags.management_server_logged_in = 0;
 155         if (ret == QLA_SUCCESS) {
 156                 fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
 157         } else {
 158                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 159                 return -1;
 160         }
 161         return 0;
 162 }
 163
 164 int
 165 qla24xx_enable_vp(scsi_qla_host_t *vha)
 166 {
 167         int ret;
 168         struct qla_hw_data *ha = vha->hw;
 169         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 170
 171         /* Check if physical ha port is Up */
 172         if (atomic_read(&base_vha->loop_state) == LOOP_DOWN  ||
 173                 atomic_read(&base_vha->loop_state) == LOOP_DEAD ||
 174                 !(ha->current_topology & ISP_CFG_F)) {
 175                 vha->vp_err_state =  VP_ERR_PORTDWN;
 176                 fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
 177                 goto enable_failed;
 178         }
 179
 180         /* Initialize the new vport unless it is a persistent port */
 181         mutex_lock(&ha->vport_lock);
 182         ret = qla24xx_modify_vp_config(vha);
 183         mutex_unlock(&ha->vport_lock);
 184
 185         if (ret != QLA_SUCCESS) {
 186                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 187                 goto enable_failed;
 188         }
 189
 190         DEBUG15(qla_printk(KERN_INFO, ha,
 191             "Virtual port with id: %d - Enabled\n", vha->vp_idx));
 192         return 0;
 193
 194 enable_failed:
 195         DEBUG15(qla_printk(KERN_INFO, ha,
 196             "Virtual port with id: %d - Disabled\n", vha->vp_idx));
 197         return 1;
 198 }
 199
 200 static void
 201 qla24xx_configure_vp(scsi_qla_host_t *vha)
 202 {
 203         struct fc_vport *fc_vport;
 204         int ret;
 205
 206         fc_vport = vha->fc_vport;
 207
 208         DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
 209             vha->host_no, __func__));
 210         ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
 211         if (ret != QLA_SUCCESS) {
 212                 DEBUG15(qla_printk(KERN_ERR, vha->hw, "Failed to enable "
 213                     "receiving of RSCN requests: 0x%x\n", ret));
 214                 return;
 215         } else {
 216                 /* Corresponds to SCR enabled */
 217                 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
 218         }
 219
 220         vha->flags.online = 1;
 221         if (qla24xx_configure_vhba(vha))
 222                 return;
 223
 224         atomic_set(&vha->vp_state, VP_ACTIVE);
 225         fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
 226 }
 227
 228 void
 229 qla2x00_alert_all_vps(struct rsp_que *rsp, uint16_t *mb)
 230 {
 231         scsi_qla_host_t *vha;
 232         struct qla_hw_data *ha = rsp->hw;
 233         int i = 0;
 234         unsigned long flags;
 235
 236         spin_lock_irqsave(&ha->vport_slock, flags);
 237         list_for_each_entry(vha, &ha->vp_list, list) {
 238                 if (vha->vp_idx) {
 239                         atomic_inc(&vha->vref_count);
 240                         spin_unlock_irqrestore(&ha->vport_slock, flags);
 241
 242                         switch (mb[0]) {
 243                         case MBA_LIP_OCCURRED:
 244                         case MBA_LOOP_UP:
 245                         case MBA_LOOP_DOWN:
 246                         case MBA_LIP_RESET:
 247                         case MBA_POINT_TO_POINT:
 248                         case MBA_CHG_IN_CONNECTION:
 249                         case MBA_PORT_UPDATE:
 250                         case MBA_RSCN_UPDATE:
 251                                 DEBUG15(printk("scsi(%ld)%s: Async_event for"
 252                                 " VP[%d], mb = 0x%x, vha=%p\n",
 253                                 vha->host_no, __func__, i, *mb, vha));
 254                                 qla2x00_async_event(vha, rsp, mb);
 255                                 break;
 256                         }
 257
 258                         spin_lock_irqsave(&ha->vport_slock, flags);
 259                         atomic_dec(&vha->vref_count);
 260                 }
 261                 i++;
 262         }
 263         spin_unlock_irqrestore(&ha->vport_slock, flags);
 264 }
 265
 266 int
 267 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
 268 {
 269         /*
 270          * Physical port will do most of the abort and recovery work. We can
 271          * just treat it as a loop down
 272          */
 273         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 274                 atomic_set(&vha->loop_state, LOOP_DOWN);
 275                 qla2x00_mark_all_devices_lost(vha, 0);
 276         } else {
 277                 if (!atomic_read(&vha->loop_down_timer))
 278                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 279         }
 280
 281         /*
 282          * To exclusively reset vport, we need to log it out first.  Note: this
 283          * control_vp can fail if ISP reset is already issued, this is
 284          * expected, as the vp would be already logged out due to ISP reset.
 285          */
 286         if (!test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags))
 287                 qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 288
 289         DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
 290             vha->host_no, vha->vp_idx));
 291         return qla24xx_enable_vp(vha);
 292 }
 293
 294 static int
 295 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
 296 {
 297         qla2x00_do_work(vha);
 298
 299         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
 300                 /* VP acquired. complete port configuration */
 301                 qla24xx_configure_vp(vha);
 302                 return 0;
 303         }
 304
 305         if (test_bit(FCPORT_UPDATE_NEEDED, &vha->dpc_flags)) {
 306                 qla2x00_update_fcports(vha);
 307                 clear_bit(FCPORT_UPDATE_NEEDED, &vha->dpc_flags);
 308         }
 309
 310         if ((test_and_clear_bit(RELOGIN_NEEDED, &vha->dpc_flags)) &&
 311                 !test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags) &&
 312                 atomic_read(&vha->loop_state) != LOOP_DOWN) {
 313
 314                 DEBUG(printk("scsi(%ld): qla2x00_port_login()\n",
 315                                                 vha->host_no));
 316                 qla2x00_relogin(vha);
 317
 318                 DEBUG(printk("scsi(%ld): qla2x00_port_login - end\n",
 319                                                         vha->host_no));
 320         }
 321
 322         if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
 323             (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
 324                 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
 325         }
 326
 327         if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
 328                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
 329                         qla2x00_loop_resync(vha);
 330                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
 331                 }
 332         }
 333
 334         return 0;
 335 }
 336
 337 void
 338 qla2x00_do_dpc_all_vps(scsi_qla_host_t *vha)
 339 {
 340         int ret;
 341         struct qla_hw_data *ha = vha->hw;
 342         scsi_qla_host_t *vp;
 343         unsigned long flags = 0;
 344
 345         if (vha->vp_idx)
 346                 return;
 347         if (list_empty(&ha->vp_list))
 348                 return;
 349
 350         clear_bit(VP_DPC_NEEDED, &vha->dpc_flags);
 351
 352         if (!(ha->current_topology & ISP_CFG_F))
 353                 return;
 354
 355         spin_lock_irqsave(&ha->vport_slock, flags);
 356         list_for_each_entry(vp, &ha->vp_list, list) {
 357                 if (vp->vp_idx) {
 358                         atomic_inc(&vp->vref_count);
 359                         spin_unlock_irqrestore(&ha->vport_slock, flags);
 360
 361                         ret = qla2x00_do_dpc_vp(vp);
 362
 363                         spin_lock_irqsave(&ha->vport_slock, flags);
 364                         atomic_dec(&vp->vref_count);
 365                 }
 366         }
 367         spin_unlock_irqrestore(&ha->vport_slock, flags);
 368 }
 369
 370 int
 371 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
 372 {
 373         scsi_qla_host_t *base_vha = shost_priv(fc_vport->shost);
 374         struct qla_hw_data *ha = base_vha->hw;
 375         scsi_qla_host_t *vha;
 376         uint8_t port_name[WWN_SIZE];
 377
 378         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
 379                 return VPCERR_UNSUPPORTED;
 380
 381         /* Check up the F/W and H/W support NPIV */
 382         if (!ha->flags.npiv_supported)
 383                 return VPCERR_UNSUPPORTED;
 384
 385         /* Check up whether npiv supported switch presented */
 386         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
 387                 return VPCERR_NO_FABRIC_SUPP;
 388
 389         /* Check up unique WWPN */
 390         u64_to_wwn(fc_vport->port_name, port_name);
 391         if (!memcmp(port_name, base_vha->port_name, WWN_SIZE))
 392                 return VPCERR_BAD_WWN;
 393         vha = qla24xx_find_vhost_by_name(ha, port_name);
 394         if (vha)
 395                 return VPCERR_BAD_WWN;
 396
 397         /* Check up max-npiv-supports */
 398         if (ha->num_vhosts > ha->max_npiv_vports) {
 399                 DEBUG15(printk("scsi(%ld): num_vhosts %ud is bigger than "
 400                     "max_npv_vports %ud.\n", base_vha->host_no,
 401                     ha->num_vhosts, ha->max_npiv_vports));
 402                 return VPCERR_UNSUPPORTED;
 403         }
 404         return 0;
 405 }
 406
 407 scsi_qla_host_t *
 408 qla24xx_create_vhost(struct fc_vport *fc_vport)
 409 {
 410         scsi_qla_host_t *base_vha = shost_priv(fc_vport->shost);
 411         struct qla_hw_data *ha = base_vha->hw;
 412         scsi_qla_host_t *vha;
 413         struct scsi_host_template *sht = &qla2xxx_driver_template;
 414         struct Scsi_Host *host;
 415
 416         vha = qla2x00_create_host(sht, ha);
 417         if (!vha) {
 418                 DEBUG(printk("qla2xxx: scsi_host_alloc() failed for vport\n"));
 419                 return(NULL);
 420         }
 421
 422         host = vha->host;
 423         fc_vport->dd_data = vha;
 424         /* New host info */
 425         u64_to_wwn(fc_vport->node_name, vha->node_name);
 426         u64_to_wwn(fc_vport->port_name, vha->port_name);
 427
 428         vha->fc_vport = fc_vport;
 429         vha->device_flags = 0;
 430         vha->vp_idx = qla24xx_allocate_vp_id(vha);
 431         if (vha->vp_idx > ha->max_npiv_vports) {
 432                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
 433                         vha->host_no));
 434                 goto create_vhost_failed;
 435         }
 436         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
 437
 438         vha->dpc_flags = 0L;
 439
 440         /*
 441          * To fix the issue of processing a parent's RSCN for the vport before
 442          * its SCR is complete.
 443          */
 444         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
 445         atomic_set(&vha->loop_state, LOOP_DOWN);
 446         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 447
 448         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
 449
 450         vha->req = base_vha->req;
 451         host->can_queue = base_vha->req->length + 128;
 452         host->this_id = 255;
 453         host->cmd_per_lun = 3;
 454         if ((IS_QLA25XX(ha) || IS_QLA81XX(ha)) && ql2xenabledif)
 455                 host->max_cmd_len = 32;
 456         else
 457                 host->max_cmd_len = MAX_CMDSZ;
 458         host->max_channel = MAX_BUSES - 1;
 459         host->max_lun = MAX_LUNS;
 460         host->unique_id = host->host_no;
 461         host->max_id = MAX_TARGETS_2200;
 462         host->transportt = qla2xxx_transport_vport_template;
 463
 464         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
 465             vha->host_no, vha));
 466
 467         vha->flags.init_done = 1;
 468
 469         mutex_lock(&ha->vport_lock);
 470         set_bit(vha->vp_idx, ha->vp_idx_map);
 471         ha->cur_vport_count++;
 472         mutex_unlock(&ha->vport_lock);
 473
 474         return vha;
 475
 476 create_vhost_failed:
 477         return NULL;
 478 }
 479
 480 static void
 481 qla25xx_free_req_que(struct scsi_qla_host *vha, struct req_que *req)
 482 {
 483         struct qla_hw_data *ha = vha->hw;
 484         uint16_t que_id = req->id;
 485
 486         dma_free_coherent(&ha->pdev->dev, (req->length + 1) *
 487                 sizeof(request_t), req->ring, req->dma);
 488         req->ring = NULL;
 489         req->dma = 0;
 490         if (que_id) {
 491                 ha->req_q_map[que_id] = NULL;
 492                 mutex_lock(&ha->vport_lock);
 493                 clear_bit(que_id, ha->req_qid_map);
 494                 mutex_unlock(&ha->vport_lock);
 495         }
 496         kfree(req);
 497         req = NULL;
 498 }
 499
 500 static void
 501 qla25xx_free_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
 502 {
 503         struct qla_hw_data *ha = vha->hw;
 504         uint16_t que_id = rsp->id;
 505
 506         if (rsp->msix && rsp->msix->have_irq) {
 507                 free_irq(rsp->msix->vector, rsp);
 508                 rsp->msix->have_irq = 0;
 509                 rsp->msix->rsp = NULL;
 510         }
 511         dma_free_coherent(&ha->pdev->dev, (rsp->length + 1) *
 512                 sizeof(response_t), rsp->ring, rsp->dma);
 513         rsp->ring = NULL;
 514         rsp->dma = 0;
 515         if (que_id) {
 516                 ha->rsp_q_map[que_id] = NULL;
 517                 mutex_lock(&ha->vport_lock);
 518                 clear_bit(que_id, ha->rsp_qid_map);
 519                 mutex_unlock(&ha->vport_lock);
 520         }
 521         kfree(rsp);
 522         rsp = NULL;
 523 }
 524
 525 int
 526 qla25xx_delete_req_que(struct scsi_qla_host *vha, struct req_que *req)
 527 {
 528         int ret = -1;
 529
 530         if (req) {
 531                 req->options |= BIT_0;
 532                 ret = qla25xx_init_req_que(vha, req);
 533         }
 534         if (ret == QLA_SUCCESS)
 535                 qla25xx_free_req_que(vha, req);
 536
 537         return ret;
 538 }
 539
 540 static int
 541 qla25xx_delete_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
 542 {
 543         int ret = -1;
 544
 545         if (rsp) {
 546                 rsp->options |= BIT_0;
 547                 ret = qla25xx_init_rsp_que(vha, rsp);
 548         }
 549         if (ret == QLA_SUCCESS)
 550                 qla25xx_free_rsp_que(vha, rsp);
 551
 552         return ret;
 553 }
 554
 555 /* Delete all queues for a given vhost */
 556 int
 557 qla25xx_delete_queues(struct scsi_qla_host *vha)
 558 {
 559         int cnt, ret = 0;
 560         struct req_que *req = NULL;
 561         struct rsp_que *rsp = NULL;
 562         struct qla_hw_data *ha = vha->hw;
 563
 564         /* Delete request queues */
 565         for (cnt = 1; cnt < ha->max_req_queues; cnt++) {
 566                 req = ha->req_q_map[cnt];
 567                 if (req) {
 568                         ret = qla25xx_delete_req_que(vha, req);
 569                         if (ret != QLA_SUCCESS) {
 570                                 qla_printk(KERN_WARNING, ha,
 571                                 "Couldn't delete req que %d\n",
 572                                 req->id);
 573                                 return ret;
 574                         }
 575                 }
 576         }
 577
 578         /* Delete response queues */
 579         for (cnt = 1; cnt < ha->max_rsp_queues; cnt++) {
 580                 rsp = ha->rsp_q_map[cnt];
 581                 if (rsp) {
 582                         ret = qla25xx_delete_rsp_que(vha, rsp);
 583                         if (ret != QLA_SUCCESS) {
 584                                 qla_printk(KERN_WARNING, ha,
 585                                 "Couldn't delete rsp que %d\n",
 586                                 rsp->id);
 587                                 return ret;
 588                         }
 589                 }
 590         }
 591         return ret;
 592 }
 593
 594 int
 595 qla25xx_create_req_que(struct qla_hw_data *ha, uint16_t options,
 596         uint8_t vp_idx, uint16_t rid, int rsp_que, uint8_t qos)
 597 {
 598         int ret = 0;
 599         struct req_que *req = NULL;
 600         struct scsi_qla_host *base_vha = pci_get_drvdata(ha->pdev);
 601         uint16_t que_id = 0;
 602         device_reg_t __iomem *reg;
 603         uint32_t cnt;
 604
 605         req = kzalloc(sizeof(struct req_que), GFP_KERNEL);
 606         if (req == NULL) {
 607                 qla_printk(KERN_WARNING, ha, "could not allocate memory"
 608                         "for request que\n");
 609                 goto failed;
 610         }
 611
 612         req->length = REQUEST_ENTRY_CNT_24XX;
 613         req->ring = dma_alloc_coherent(&ha->pdev->dev,
 614                         (req->length + 1) * sizeof(request_t),
 615                         &req->dma, GFP_KERNEL);
 616         if (req->ring == NULL) {
 617                 qla_printk(KERN_WARNING, ha,
 618                 "Memory Allocation failed - request_ring\n");
 619                 goto que_failed;
 620         }
 621
 622         mutex_lock(&ha->vport_lock);
 623         que_id = find_first_zero_bit(ha->req_qid_map, ha->max_req_queues);
 624         if (que_id >= ha->max_req_queues) {
 625                 mutex_unlock(&ha->vport_lock);
 626                 qla_printk(KERN_INFO, ha, "No resources to create "
 627                          "additional request queue\n");
 628                 goto que_failed;
 629         }
 630         set_bit(que_id, ha->req_qid_map);
 631         ha->req_q_map[que_id] = req;
 632         req->rid = rid;
 633         req->vp_idx = vp_idx;
 634         req->qos = qos;
 635
 636         if (rsp_que < 0)
 637                 req->rsp = NULL;
 638         else
 639                 req->rsp = ha->rsp_q_map[rsp_que];
 640         /* Use alternate PCI bus number */
 641         if (MSB(req->rid))
 642                 options |= BIT_4;
 643         /* Use alternate PCI devfn */
 644         if (LSB(req->rid))
 645                 options |= BIT_5;
 646         req->options = options;
 647
 648         for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++)
 649                 req->outstanding_cmds[cnt] = NULL;
 650         req->current_outstanding_cmd = 1;
 651
 652         req->ring_ptr = req->ring;
 653         req->ring_index = 0;
 654         req->cnt = req->length;
 655         req->id = que_id;
 656         reg = ISP_QUE_REG(ha, que_id);
 657         req->max_q_depth = ha->req_q_map[0]->max_q_depth;
 658         mutex_unlock(&ha->vport_lock);
 659
 660         ret = qla25xx_init_req_que(base_vha, req);
 661         if (ret != QLA_SUCCESS) {
 662                 qla_printk(KERN_WARNING, ha, "%s failed\n", __func__);
 663                 mutex_lock(&ha->vport_lock);
 664                 clear_bit(que_id, ha->req_qid_map);
 665                 mutex_unlock(&ha->vport_lock);
 666                 goto que_failed;
 667         }
 668
 669         return req->id;
 670
 671 que_failed:
 672         qla25xx_free_req_que(base_vha, req);
 673 failed:
 674         return 0;
 675 }
 676
 677 static void qla_do_work(struct work_struct *work)
 678 {
 679         unsigned long flags;
 680         struct rsp_que *rsp = container_of(work, struct rsp_que, q_work);
 681         struct scsi_qla_host *vha;
 682         struct qla_hw_data *ha = rsp->hw;
 683
 684         spin_lock_irqsave(&rsp->hw->hardware_lock, flags);
 685         vha = pci_get_drvdata(ha->pdev);
 686         qla24xx_process_response_queue(vha, rsp);
 687         spin_unlock_irqrestore(&rsp->hw->hardware_lock, flags);
 688 }
 689
 690 /* create response queue */
 691 int
 692 qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
 693         uint8_t vp_idx, uint16_t rid, int req)
 694 {
 695         int ret = 0;
 696         struct rsp_que *rsp = NULL;
 697         struct scsi_qla_host *base_vha = pci_get_drvdata(ha->pdev);
 698         uint16_t que_id = 0;
 699         device_reg_t __iomem *reg;
 700
 701         rsp = kzalloc(sizeof(struct rsp_que), GFP_KERNEL);
 702         if (rsp == NULL) {
 703                 qla_printk(KERN_WARNING, ha, "could not allocate memory for"
 704                                 " response que\n");
 705                 goto failed;
 706         }
 707
 708         rsp->length = RESPONSE_ENTRY_CNT_MQ;
 709         rsp->ring = dma_alloc_coherent(&ha->pdev->dev,
 710                         (rsp->length + 1) * sizeof(response_t),
 711                         &rsp->dma, GFP_KERNEL);
 712         if (rsp->ring == NULL) {
 713                 qla_printk(KERN_WARNING, ha,
 714                 "Memory Allocation failed - response_ring\n");
 715                 goto que_failed;
 716         }
 717
 718         mutex_lock(&ha->vport_lock);
 719         que_id = find_first_zero_bit(ha->rsp_qid_map, ha->max_rsp_queues);
 720         if (que_id >= ha->max_rsp_queues) {
 721                 mutex_unlock(&ha->vport_lock);
 722                 qla_printk(KERN_INFO, ha, "No resources to create "
 723                          "additional response queue\n");
 724                 goto que_failed;
 725         }
 726         set_bit(que_id, ha->rsp_qid_map);
 727
 728         if (ha->flags.msix_enabled)
 729                 rsp->msix = &ha->msix_entries[que_id + 1];
 730         else
 731                 qla_printk(KERN_WARNING, ha, "msix not enabled\n");
 732
 733         ha->rsp_q_map[que_id] = rsp;
 734         rsp->rid = rid;
 735         rsp->vp_idx = vp_idx;
 736         rsp->hw = ha;
 737         /* Use alternate PCI bus number */
 738         if (MSB(rsp->rid))
 739                 options |= BIT_4;
 740         /* Use alternate PCI devfn */
 741         if (LSB(rsp->rid))
 742                 options |= BIT_5;
 743         /* Enable MSIX handshake mode on for uncapable adapters */
 744         if (!IS_MSIX_NACK_CAPABLE(ha))
 745                 options |= BIT_6;
 746
 747         rsp->options = options;
 748         rsp->id = que_id;
 749         reg = ISP_QUE_REG(ha, que_id);
 750         rsp->rsp_q_in = &reg->isp25mq.rsp_q_in;
 751         rsp->rsp_q_out = &reg->isp25mq.rsp_q_out;
 752         mutex_unlock(&ha->vport_lock);
 753
 754         ret = qla25xx_request_irq(rsp);
 755         if (ret)
 756                 goto que_failed;
 757
 758         ret = qla25xx_init_rsp_que(base_vha, rsp);
 759         if (ret != QLA_SUCCESS) {
 760                 qla_printk(KERN_WARNING, ha, "%s failed\n", __func__);
 761                 mutex_lock(&ha->vport_lock);
 762                 clear_bit(que_id, ha->rsp_qid_map);
 763                 mutex_unlock(&ha->vport_lock);
 764                 goto que_failed;
 765         }
 766         if (req >= 0)
 767                 rsp->req = ha->req_q_map[req];
 768         else
 769                 rsp->req = NULL;
 770
 771         qla2x00_init_response_q_entries(rsp);
 772         if (rsp->hw->wq)
 773                 INIT_WORK(&rsp->q_work, qla_do_work);
 774         return rsp->id;
 775
 776 que_failed:
 777         qla25xx_free_rsp_que(base_vha, rsp);
 778 failed:
 779         return 0;
 780 }