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                 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
 139                 qla2x00_mark_device_lost(vha, fcport, 0, 0);
 140                 atomic_set(&fcport->state, FCS_UNCONFIGURED);
 141         }
 142 }
 143
 144 int
 145 qla24xx_disable_vp(scsi_qla_host_t *vha)
 146 {
 147         int ret;
 148
 149         ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 150         atomic_set(&vha->loop_state, LOOP_DOWN);
 151         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 152
 153         qla2x00_mark_vp_devices_dead(vha);
 154         atomic_set(&vha->vp_state, VP_FAILED);
 155         vha->flags.management_server_logged_in = 0;
 156         if (ret == QLA_SUCCESS) {
 157                 fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
 158         } else {
 159                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 160                 return -1;
 161         }
 162         return 0;
 163 }
 164
 165 int
 166 qla24xx_enable_vp(scsi_qla_host_t *vha)
 167 {
 168         int ret;
 169         struct qla_hw_data *ha = vha->hw;
 170         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 171
 172         /* Check if physical ha port is Up */
 173         if (atomic_read(&base_vha->loop_state) == LOOP_DOWN  ||
 174                 atomic_read(&base_vha->loop_state) == LOOP_DEAD ||
 175                 !(ha->current_topology & ISP_CFG_F)) {
 176                 vha->vp_err_state =  VP_ERR_PORTDWN;
 177                 fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
 178                 goto enable_failed;
 179         }
 180
 181         /* Initialize the new vport unless it is a persistent port */
 182         mutex_lock(&ha->vport_lock);
 183         ret = qla24xx_modify_vp_config(vha);
 184         mutex_unlock(&ha->vport_lock);
 185
 186         if (ret != QLA_SUCCESS) {
 187                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 188                 goto enable_failed;
 189         }
 190
 191         DEBUG15(qla_printk(KERN_INFO, ha,
 192             "Virtual port with id: %d - Enabled\n", vha->vp_idx));
 193         return 0;
 194
 195 enable_failed:
 196         DEBUG15(qla_printk(KERN_INFO, ha,
 197             "Virtual port with id: %d - Disabled\n", vha->vp_idx));
 198         return 1;
 199 }
 200
 201 static void
 202 qla24xx_configure_vp(scsi_qla_host_t *vha)
 203 {
 204         struct fc_vport *fc_vport;
 205         int ret;
 206
 207         fc_vport = vha->fc_vport;
 208
 209         DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
 210             vha->host_no, __func__));
 211         ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
 212         if (ret != QLA_SUCCESS) {
 213                 DEBUG15(qla_printk(KERN_ERR, vha->hw, "Failed to enable "
 214                     "receiving of RSCN requests: 0x%x\n", ret));
 215                 return;
 216         } else {
 217                 /* Corresponds to SCR enabled */
 218                 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
 219         }
 220
 221         vha->flags.online = 1;
 222         if (qla24xx_configure_vhba(vha))
 223                 return;
 224
 225         atomic_set(&vha->vp_state, VP_ACTIVE);
 226         fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
 227 }
 228
 229 void
 230 qla2x00_alert_all_vps(struct rsp_que *rsp, uint16_t *mb)
 231 {
 232         scsi_qla_host_t *vha;
 233         struct qla_hw_data *ha = rsp->hw;
 234         int i = 0;
 235         unsigned long flags;
 236
 237         spin_lock_irqsave(&ha->vport_slock, flags);
 238         list_for_each_entry(vha, &ha->vp_list, list) {
 239                 if (vha->vp_idx) {
 240                         atomic_inc(&vha->vref_count);
 241                         spin_unlock_irqrestore(&ha->vport_slock, flags);
 242
 243                         switch (mb[0]) {
 244                         case MBA_LIP_OCCURRED:
 245                         case MBA_LOOP_UP:
 246                         case MBA_LOOP_DOWN:
 247                         case MBA_LIP_RESET:
 248                         case MBA_POINT_TO_POINT:
 249                         case MBA_CHG_IN_CONNECTION:
 250                         case MBA_PORT_UPDATE:
 251                         case MBA_RSCN_UPDATE:
 252                                 DEBUG15(printk("scsi(%ld)%s: Async_event for"
 253                                 " VP[%d], mb = 0x%x, vha=%p\n",
 254                                 vha->host_no, __func__, i, *mb, vha));
 255                                 qla2x00_async_event(vha, rsp, mb);
 256                                 break;
 257                         }
 258
 259                         spin_lock_irqsave(&ha->vport_slock, flags);
 260                         atomic_dec(&vha->vref_count);
 261                 }
 262                 i++;
 263         }
 264         spin_unlock_irqrestore(&ha->vport_slock, flags);
 265 }
 266
 267 int
 268 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
 269 {
 270         /*
 271          * Physical port will do most of the abort and recovery work. We can
 272          * just treat it as a loop down
 273          */
 274         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 275                 atomic_set(&vha->loop_state, LOOP_DOWN);
 276                 qla2x00_mark_all_devices_lost(vha, 0);
 277         } else {
 278                 if (!atomic_read(&vha->loop_down_timer))
 279                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 280         }
 281
 282         /*
 283          * To exclusively reset vport, we need to log it out first.  Note: this
 284          * control_vp can fail if ISP reset is already issued, this is
 285          * expected, as the vp would be already logged out due to ISP reset.
 286          */
 287         if (!test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags))
 288                 qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 289
 290         DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
 291             vha->host_no, vha->vp_idx));
 292         return qla24xx_enable_vp(vha);
 293 }
 294
 295 static int
 296 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
 297 {
 298         qla2x00_do_work(vha);
 299
 300         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
 301                 /* VP acquired. complete port configuration */
 302                 qla24xx_configure_vp(vha);
 303                 return 0;
 304         }
 305
 306         if (test_bit(FCPORT_UPDATE_NEEDED, &vha->dpc_flags)) {
 307                 qla2x00_update_fcports(vha);
 308                 clear_bit(FCPORT_UPDATE_NEEDED, &vha->dpc_flags);
 309         }
 310
 311         if ((test_and_clear_bit(RELOGIN_NEEDED, &vha->dpc_flags)) &&
 312                 !test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags) &&
 313                 atomic_read(&vha->loop_state) != LOOP_DOWN) {
 314
 315                 DEBUG(printk("scsi(%ld): qla2x00_port_login()\n",
 316                                                 vha->host_no));
 317                 qla2x00_relogin(vha);
 318
 319                 DEBUG(printk("scsi(%ld): qla2x00_port_login - end\n",
 320                                                         vha->host_no));
 321         }
 322
 323         if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
 324             (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
 325                 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
 326         }
 327
 328         if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
 329                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
 330                         qla2x00_loop_resync(vha);
 331                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
 332                 }
 333         }
 334
 335         return 0;
 336 }
 337
 338 void
 339 qla2x00_do_dpc_all_vps(scsi_qla_host_t *vha)
 340 {
 341         int ret;
 342         struct qla_hw_data *ha = vha->hw;
 343         scsi_qla_host_t *vp;
 344         unsigned long flags = 0;
 345
 346         if (vha->vp_idx)
 347                 return;
 348         if (list_empty(&ha->vp_list))
 349                 return;
 350
 351         clear_bit(VP_DPC_NEEDED, &vha->dpc_flags);
 352
 353         if (!(ha->current_topology & ISP_CFG_F))
 354                 return;
 355
 356         spin_lock_irqsave(&ha->vport_slock, flags);
 357         list_for_each_entry(vp, &ha->vp_list, list) {
 358                 if (vp->vp_idx) {
 359                         atomic_inc(&vp->vref_count);
 360                         spin_unlock_irqrestore(&ha->vport_slock, flags);
 361
 362                         ret = qla2x00_do_dpc_vp(vp);
 363
 364                         spin_lock_irqsave(&ha->vport_slock, flags);
 365                         atomic_dec(&vp->vref_count);
 366                 }
 367         }
 368         spin_unlock_irqrestore(&ha->vport_slock, flags);
 369 }
 370
 371 int
 372 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
 373 {
 374         scsi_qla_host_t *base_vha = shost_priv(fc_vport->shost);
 375         struct qla_hw_data *ha = base_vha->hw;
 376         scsi_qla_host_t *vha;
 377         uint8_t port_name[WWN_SIZE];
 378
 379         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
 380                 return VPCERR_UNSUPPORTED;
 381
 382         /* Check up the F/W and H/W support NPIV */
 383         if (!ha->flags.npiv_supported)
 384                 return VPCERR_UNSUPPORTED;
 385
 386         /* Check up whether npiv supported switch presented */
 387         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
 388                 return VPCERR_NO_FABRIC_SUPP;
 389
 390         /* Check up unique WWPN */
 391         u64_to_wwn(fc_vport->port_name, port_name);
 392         if (!memcmp(port_name, base_vha->port_name, WWN_SIZE))
 393                 return VPCERR_BAD_WWN;
 394         vha = qla24xx_find_vhost_by_name(ha, port_name);
 395         if (vha)
 396                 return VPCERR_BAD_WWN;
 397
 398         /* Check up max-npiv-supports */
 399         if (ha->num_vhosts > ha->max_npiv_vports) {
 400                 DEBUG15(printk("scsi(%ld): num_vhosts %ud is bigger than "
 401                     "max_npv_vports %ud.\n", base_vha->host_no,
 402                     ha->num_vhosts, ha->max_npiv_vports));
 403                 return VPCERR_UNSUPPORTED;
 404         }
 405         return 0;
 406 }
 407
 408 scsi_qla_host_t *
 409 qla24xx_create_vhost(struct fc_vport *fc_vport)
 410 {
 411         scsi_qla_host_t *base_vha = shost_priv(fc_vport->shost);
 412         struct qla_hw_data *ha = base_vha->hw;
 413         scsi_qla_host_t *vha;
 414         struct scsi_host_template *sht = &qla2xxx_driver_template;
 415         struct Scsi_Host *host;
 416
 417         vha = qla2x00_create_host(sht, ha);
 418         if (!vha) {
 419                 DEBUG(printk("qla2xxx: scsi_host_alloc() failed for vport\n"));
 420                 return(NULL);
 421         }
 422
 423         host = vha->host;
 424         fc_vport->dd_data = vha;
 425         /* New host info */
 426         u64_to_wwn(fc_vport->node_name, vha->node_name);
 427         u64_to_wwn(fc_vport->port_name, vha->port_name);
 428
 429         vha->fc_vport = fc_vport;
 430         vha->device_flags = 0;
 431         vha->vp_idx = qla24xx_allocate_vp_id(vha);
 432         if (vha->vp_idx > ha->max_npiv_vports) {
 433                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
 434                         vha->host_no));
 435                 goto create_vhost_failed;
 436         }
 437         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
 438
 439         vha->dpc_flags = 0L;
 440
 441         /*
 442          * To fix the issue of processing a parent's RSCN for the vport before
 443          * its SCR is complete.
 444          */
 445         set_bit(VP_SCR_NEEDED, &vha->vp_flags);
 446         atomic_set(&vha->loop_state, LOOP_DOWN);
 447         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 448
 449         qla2x00_start_timer(vha, qla2x00_timer, WATCH_INTERVAL);
 450
 451         vha->req = base_vha->req;
 452         host->can_queue = base_vha->req->length + 128;
 453         host->this_id = 255;
 454         host->cmd_per_lun = 3;
 455         if ((IS_QLA25XX(ha) || IS_QLA81XX(ha)) && ql2xenabledif)
 456                 host->max_cmd_len = 32;
 457         else
 458                 host->max_cmd_len = MAX_CMDSZ;
 459         host->max_channel = MAX_BUSES - 1;
 460         host->max_lun = MAX_LUNS;
 461         host->unique_id = host->host_no;
 462         host->max_id = MAX_TARGETS_2200;
 463         host->transportt = qla2xxx_transport_vport_template;
 464
 465         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
 466             vha->host_no, vha));
 467
 468         vha->flags.init_done = 1;
 469
 470         mutex_lock(&ha->vport_lock);
 471         set_bit(vha->vp_idx, ha->vp_idx_map);
 472         ha->cur_vport_count++;
 473         mutex_unlock(&ha->vport_lock);
 474
 475         return vha;
 476
 477 create_vhost_failed:
 478         return NULL;
 479 }
 480
 481 static void
 482 qla25xx_free_req_que(struct scsi_qla_host *vha, struct req_que *req)
 483 {
 484         struct qla_hw_data *ha = vha->hw;
 485         uint16_t que_id = req->id;
 486
 487         dma_free_coherent(&ha->pdev->dev, (req->length + 1) *
 488                 sizeof(request_t), req->ring, req->dma);
 489         req->ring = NULL;
 490         req->dma = 0;
 491         if (que_id) {
 492                 ha->req_q_map[que_id] = NULL;
 493                 mutex_lock(&ha->vport_lock);
 494                 clear_bit(que_id, ha->req_qid_map);
 495                 mutex_unlock(&ha->vport_lock);
 496         }
 497         kfree(req);
 498         req = NULL;
 499 }
 500
 501 static void
 502 qla25xx_free_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
 503 {
 504         struct qla_hw_data *ha = vha->hw;
 505         uint16_t que_id = rsp->id;
 506
 507         if (rsp->msix && rsp->msix->have_irq) {
 508                 free_irq(rsp->msix->vector, rsp);
 509                 rsp->msix->have_irq = 0;
 510                 rsp->msix->rsp = NULL;
 511         }
 512         dma_free_coherent(&ha->pdev->dev, (rsp->length + 1) *
 513                 sizeof(response_t), rsp->ring, rsp->dma);
 514         rsp->ring = NULL;
 515         rsp->dma = 0;
 516         if (que_id) {
 517                 ha->rsp_q_map[que_id] = NULL;
 518                 mutex_lock(&ha->vport_lock);
 519                 clear_bit(que_id, ha->rsp_qid_map);
 520                 mutex_unlock(&ha->vport_lock);
 521         }
 522         kfree(rsp);
 523         rsp = NULL;
 524 }
 525
 526 int
 527 qla25xx_delete_req_que(struct scsi_qla_host *vha, struct req_que *req)
 528 {
 529         int ret = -1;
 530
 531         if (req) {
 532                 req->options |= BIT_0;
 533                 ret = qla25xx_init_req_que(vha, req);
 534         }
 535         if (ret == QLA_SUCCESS)
 536                 qla25xx_free_req_que(vha, req);
 537
 538         return ret;
 539 }
 540
 541 static int
 542 qla25xx_delete_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
 543 {
 544         int ret = -1;
 545
 546         if (rsp) {
 547                 rsp->options |= BIT_0;
 548                 ret = qla25xx_init_rsp_que(vha, rsp);
 549         }
 550         if (ret == QLA_SUCCESS)
 551                 qla25xx_free_rsp_que(vha, rsp);
 552
 553         return ret;
 554 }
 555
 556 /* Delete all queues for a given vhost */
 557 int
 558 qla25xx_delete_queues(struct scsi_qla_host *vha)
 559 {
 560         int cnt, ret = 0;
 561         struct req_que *req = NULL;
 562         struct rsp_que *rsp = NULL;
 563         struct qla_hw_data *ha = vha->hw;
 564
 565         /* Delete request queues */
 566         for (cnt = 1; cnt < ha->max_req_queues; cnt++) {
 567                 req = ha->req_q_map[cnt];
 568                 if (req) {
 569                         ret = qla25xx_delete_req_que(vha, req);
 570                         if (ret != QLA_SUCCESS) {
 571                                 qla_printk(KERN_WARNING, ha,
 572                                 "Couldn't delete req que %d\n",
 573                                 req->id);
 574                                 return ret;
 575                         }
 576                 }
 577         }
 578
 579         /* Delete response queues */
 580         for (cnt = 1; cnt < ha->max_rsp_queues; cnt++) {
 581                 rsp = ha->rsp_q_map[cnt];
 582                 if (rsp) {
 583                         ret = qla25xx_delete_rsp_que(vha, rsp);
 584                         if (ret != QLA_SUCCESS) {
 585                                 qla_printk(KERN_WARNING, ha,
 586                                 "Couldn't delete rsp que %d\n",
 587                                 rsp->id);
 588                                 return ret;
 589                         }
 590                 }
 591         }
 592         return ret;
 593 }
 594
 595 int
 596 qla25xx_create_req_que(struct qla_hw_data *ha, uint16_t options,
 597         uint8_t vp_idx, uint16_t rid, int rsp_que, uint8_t qos)
 598 {
 599         int ret = 0;
 600         struct req_que *req = NULL;
 601         struct scsi_qla_host *base_vha = pci_get_drvdata(ha->pdev);
 602         uint16_t que_id = 0;
 603         device_reg_t __iomem *reg;
 604         uint32_t cnt;
 605
 606         req = kzalloc(sizeof(struct req_que), GFP_KERNEL);
 607         if (req == NULL) {
 608                 qla_printk(KERN_WARNING, ha, "could not allocate memory"
 609                         "for request que\n");
 610                 goto failed;
 611         }
 612
 613         req->length = REQUEST_ENTRY_CNT_24XX;
 614         req->ring = dma_alloc_coherent(&ha->pdev->dev,
 615                         (req->length + 1) * sizeof(request_t),
 616                         &req->dma, GFP_KERNEL);
 617         if (req->ring == NULL) {
 618                 qla_printk(KERN_WARNING, ha,
 619                 "Memory Allocation failed - request_ring\n");
 620                 goto que_failed;
 621         }
 622
 623         mutex_lock(&ha->vport_lock);
 624         que_id = find_first_zero_bit(ha->req_qid_map, ha->max_req_queues);
 625         if (que_id >= ha->max_req_queues) {
 626                 mutex_unlock(&ha->vport_lock);
 627                 qla_printk(KERN_INFO, ha, "No resources to create "
 628                          "additional request queue\n");
 629                 goto que_failed;
 630         }
 631         set_bit(que_id, ha->req_qid_map);
 632         ha->req_q_map[que_id] = req;
 633         req->rid = rid;
 634         req->vp_idx = vp_idx;
 635         req->qos = qos;
 636
 637         if (rsp_que < 0)
 638                 req->rsp = NULL;
 639         else
 640                 req->rsp = ha->rsp_q_map[rsp_que];
 641         /* Use alternate PCI bus number */
 642         if (MSB(req->rid))
 643                 options |= BIT_4;
 644         /* Use alternate PCI devfn */
 645         if (LSB(req->rid))
 646                 options |= BIT_5;
 647         req->options = options;
 648
 649         for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++)
 650                 req->outstanding_cmds[cnt] = NULL;
 651         req->current_outstanding_cmd = 1;
 652
 653         req->ring_ptr = req->ring;
 654         req->ring_index = 0;
 655         req->cnt = req->length;
 656         req->id = que_id;
 657         reg = ISP_QUE_REG(ha, que_id);
 658         req->max_q_depth = ha->req_q_map[0]->max_q_depth;
 659         mutex_unlock(&ha->vport_lock);
 660
 661         ret = qla25xx_init_req_que(base_vha, req);
 662         if (ret != QLA_SUCCESS) {
 663                 qla_printk(KERN_WARNING, ha, "%s failed\n", __func__);
 664                 mutex_lock(&ha->vport_lock);
 665                 clear_bit(que_id, ha->req_qid_map);
 666                 mutex_unlock(&ha->vport_lock);
 667                 goto que_failed;
 668         }
 669
 670         return req->id;
 671
 672 que_failed:
 673         qla25xx_free_req_que(base_vha, req);
 674 failed:
 675         return 0;
 676 }
 677
 678 static void qla_do_work(struct work_struct *work)
 679 {
 680         unsigned long flags;
 681         struct rsp_que *rsp = container_of(work, struct rsp_que, q_work);
 682         struct scsi_qla_host *vha;
 683         struct qla_hw_data *ha = rsp->hw;
 684
 685         spin_lock_irqsave(&rsp->hw->hardware_lock, flags);
 686         vha = pci_get_drvdata(ha->pdev);
 687         qla24xx_process_response_queue(vha, rsp);
 688         spin_unlock_irqrestore(&rsp->hw->hardware_lock, flags);
 689 }
 690
 691 /* create response queue */
 692 int
 693 qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
 694         uint8_t vp_idx, uint16_t rid, int req)
 695 {
 696         int ret = 0;
 697         struct rsp_que *rsp = NULL;
 698         struct scsi_qla_host *base_vha = pci_get_drvdata(ha->pdev);
 699         uint16_t que_id = 0;
 700         device_reg_t __iomem *reg;
 701
 702         rsp = kzalloc(sizeof(struct rsp_que), GFP_KERNEL);
 703         if (rsp == NULL) {
 704                 qla_printk(KERN_WARNING, ha, "could not allocate memory for"
 705                                 " response que\n");
 706                 goto failed;
 707         }
 708
 709         rsp->length = RESPONSE_ENTRY_CNT_MQ;
 710         rsp->ring = dma_alloc_coherent(&ha->pdev->dev,
 711                         (rsp->length + 1) * sizeof(response_t),
 712                         &rsp->dma, GFP_KERNEL);
 713         if (rsp->ring == NULL) {
 714                 qla_printk(KERN_WARNING, ha,
 715                 "Memory Allocation failed - response_ring\n");
 716                 goto que_failed;
 717         }
 718
 719         mutex_lock(&ha->vport_lock);
 720         que_id = find_first_zero_bit(ha->rsp_qid_map, ha->max_rsp_queues);
 721         if (que_id >= ha->max_rsp_queues) {
 722                 mutex_unlock(&ha->vport_lock);
 723                 qla_printk(KERN_INFO, ha, "No resources to create "
 724                          "additional response queue\n");
 725                 goto que_failed;
 726         }
 727         set_bit(que_id, ha->rsp_qid_map);
 728
 729         if (ha->flags.msix_enabled)
 730                 rsp->msix = &ha->msix_entries[que_id + 1];
 731         else
 732                 qla_printk(KERN_WARNING, ha, "msix not enabled\n");
 733
 734         ha->rsp_q_map[que_id] = rsp;
 735         rsp->rid = rid;
 736         rsp->vp_idx = vp_idx;
 737         rsp->hw = ha;
 738         /* Use alternate PCI bus number */
 739         if (MSB(rsp->rid))
 740                 options |= BIT_4;
 741         /* Use alternate PCI devfn */
 742         if (LSB(rsp->rid))
 743                 options |= BIT_5;
 744         /* Enable MSIX handshake mode on for uncapable adapters */
 745         if (!IS_MSIX_NACK_CAPABLE(ha))
 746                 options |= BIT_6;
 747
 748         rsp->options = options;
 749         rsp->id = que_id;
 750         reg = ISP_QUE_REG(ha, que_id);
 751         rsp->rsp_q_in = &reg->isp25mq.rsp_q_in;
 752         rsp->rsp_q_out = &reg->isp25mq.rsp_q_out;
 753         mutex_unlock(&ha->vport_lock);
 754
 755         ret = qla25xx_request_irq(rsp);
 756         if (ret)
 757                 goto que_failed;
 758
 759         ret = qla25xx_init_rsp_que(base_vha, rsp);
 760         if (ret != QLA_SUCCESS) {
 761                 qla_printk(KERN_WARNING, ha, "%s failed\n", __func__);
 762                 mutex_lock(&ha->vport_lock);
 763                 clear_bit(que_id, ha->rsp_qid_map);
 764                 mutex_unlock(&ha->vport_lock);
 765                 goto que_failed;
 766         }
 767         if (req >= 0)
 768                 rsp->req = ha->req_q_map[req];
 769         else
 770                 rsp->req = NULL;
 771
 772         qla2x00_init_response_q_entries(rsp);
 773         if (rsp->hw->wq)
 774                 INIT_WORK(&rsp->q_work, qla_do_work);
 775         return rsp->id;
 776
 777 que_failed:
 778         qla25xx_free_rsp_que(base_vha, rsp);
 779 failed:
 780         return 0;
 781 }