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