drivers/scsi/qla2xxx/qla_mid.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2008 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/list.h>
  13
  14 #include <scsi/scsi_tcq.h>
  15 #include <scsi/scsicam.h>
  16 #include <linux/delay.h>
  17
  18 void
  19 qla2x00_vp_stop_timer(scsi_qla_host_t *vha)
  20 {
  21         if (vha->vp_idx && vha->timer_active) {
  22                 del_timer_sync(&vha->timer);
  23                 vha->timer_active = 0;
  24         }
  25 }
  26
  27 static uint32_t
  28 qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
  29 {
  30         uint32_t vp_id;
  31         struct qla_hw_data *ha = vha->hw;
  32
  33         /* Find an empty slot and assign an vp_id */
  34         mutex_lock(&ha->vport_lock);
  35         vp_id = find_first_zero_bit(ha->vp_idx_map, ha->max_npiv_vports + 1);
  36         if (vp_id > ha->max_npiv_vports) {
  37                 DEBUG15(printk ("vp_id %d is bigger than max-supported %d.\n",
  38                     vp_id, ha->max_npiv_vports));
  39                 mutex_unlock(&ha->vport_lock);
  40                 return vp_id;
  41         }
  42
  43         set_bit(vp_id, ha->vp_idx_map);
  44         ha->num_vhosts++;
  45         vha->vp_idx = vp_id;
  46         list_add_tail(&vha->list, &ha->vp_list);
  47         mutex_unlock(&ha->vport_lock);
  48         return vp_id;
  49 }
  50
  51 void
  52 qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
  53 {
  54         uint16_t vp_id;
  55         struct qla_hw_data *ha = vha->hw;
  56
  57         mutex_lock(&ha->vport_lock);
  58         vp_id = vha->vp_idx;
  59         ha->num_vhosts--;
  60         clear_bit(vp_id, ha->vp_idx_map);
  61         list_del(&vha->list);
  62         mutex_unlock(&ha->vport_lock);
  63 }
  64
  65 static scsi_qla_host_t *
  66 qla24xx_find_vhost_by_name(struct qla_hw_data *ha, uint8_t *port_name)
  67 {
  68         scsi_qla_host_t *vha;
  69         struct scsi_qla_host *tvha;
  70
  71         /* Locate matching device in database. */
  72         list_for_each_entry_safe(vha, tvha, &ha->vp_list, list) {
  73                 if (!memcmp(port_name, vha->port_name, WWN_SIZE))
  74                         return vha;
  75         }
  76         return NULL;
  77 }
  78
  79 /*
  80  * qla2x00_mark_vp_devices_dead
  81  *      Updates fcport state when device goes offline.
  82  *
  83  * Input:
  84  *      ha = adapter block pointer.
  85  *      fcport = port structure pointer.
  86  *
  87  * Return:
  88  *      None.
  89  *
  90  * Context:
  91  */
  92 static void
  93 qla2x00_mark_vp_devices_dead(scsi_qla_host_t *vha)
  94 {
  95         fc_port_t *fcport;
  96
  97         list_for_each_entry(fcport, &vha->vp_fcports, list) {
  98                 DEBUG15(printk("scsi(%ld): Marking port dead, "
  99                     "loop_id=0x%04x :%x\n",
 100                     vha->host_no, fcport->loop_id, fcport->vp_idx));
 101
 102                 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
 103                 qla2x00_mark_device_lost(vha, fcport, 0, 0);
 104                 atomic_set(&fcport->state, FCS_UNCONFIGURED);
 105         }
 106 }
 107
 108 int
 109 qla24xx_disable_vp(scsi_qla_host_t *vha)
 110 {
 111         int ret;
 112
 113         ret = qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 114         atomic_set(&vha->loop_state, LOOP_DOWN);
 115         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 116
 117         qla2x00_mark_vp_devices_dead(vha);
 118         atomic_set(&vha->vp_state, VP_FAILED);
 119         vha->flags.management_server_logged_in = 0;
 120         if (ret == QLA_SUCCESS) {
 121                 fc_vport_set_state(vha->fc_vport, FC_VPORT_DISABLED);
 122         } else {
 123                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 124                 return -1;
 125         }
 126         return 0;
 127 }
 128
 129 int
 130 qla24xx_enable_vp(scsi_qla_host_t *vha)
 131 {
 132         int ret;
 133         struct qla_hw_data *ha = vha->hw;
 134         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 135
 136         /* Check if physical ha port is Up */
 137         if (atomic_read(&base_vha->loop_state) == LOOP_DOWN  ||
 138                 atomic_read(&base_vha->loop_state) == LOOP_DEAD) {
 139                 vha->vp_err_state =  VP_ERR_PORTDWN;
 140                 fc_vport_set_state(vha->fc_vport, FC_VPORT_LINKDOWN);
 141                 goto enable_failed;
 142         }
 143
 144         /* Initialize the new vport unless it is a persistent port */
 145         mutex_lock(&ha->vport_lock);
 146         ret = qla24xx_modify_vp_config(vha);
 147         mutex_unlock(&ha->vport_lock);
 148
 149         if (ret != QLA_SUCCESS) {
 150                 fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 151                 goto enable_failed;
 152         }
 153
 154         DEBUG15(qla_printk(KERN_INFO, ha,
 155             "Virtual port with id: %d - Enabled\n", vha->vp_idx));
 156         return 0;
 157
 158 enable_failed:
 159         DEBUG15(qla_printk(KERN_INFO, ha,
 160             "Virtual port with id: %d - Disabled\n", vha->vp_idx));
 161         return 1;
 162 }
 163
 164 static void
 165 qla24xx_configure_vp(scsi_qla_host_t *vha)
 166 {
 167         struct fc_vport *fc_vport;
 168         int ret;
 169
 170         fc_vport = vha->fc_vport;
 171
 172         DEBUG15(printk("scsi(%ld): %s: change request #3 for this host.\n",
 173             vha->host_no, __func__));
 174         ret = qla2x00_send_change_request(vha, 0x3, vha->vp_idx);
 175         if (ret != QLA_SUCCESS) {
 176                 DEBUG15(qla_printk(KERN_ERR, vha->hw, "Failed to enable "
 177                     "receiving of RSCN requests: 0x%x\n", ret));
 178                 return;
 179         } else {
 180                 /* Corresponds to SCR enabled */
 181                 clear_bit(VP_SCR_NEEDED, &vha->vp_flags);
 182         }
 183
 184         vha->flags.online = 1;
 185         if (qla24xx_configure_vhba(vha))
 186                 return;
 187
 188         atomic_set(&vha->vp_state, VP_ACTIVE);
 189         fc_vport_set_state(fc_vport, FC_VPORT_ACTIVE);
 190 }
 191
 192 void
 193 qla2x00_alert_all_vps(struct rsp_que *rsp, uint16_t *mb)
 194 {
 195         scsi_qla_host_t *vha, *tvha;
 196         struct qla_hw_data *ha = rsp->hw;
 197         int i = 0;
 198
 199         list_for_each_entry_safe(vha, tvha, &ha->vp_list, list) {
 200                 if (vha->vp_idx) {
 201                         switch (mb[0]) {
 202                         case MBA_LIP_OCCURRED:
 203                         case MBA_LOOP_UP:
 204                         case MBA_LOOP_DOWN:
 205                         case MBA_LIP_RESET:
 206                         case MBA_POINT_TO_POINT:
 207                         case MBA_CHG_IN_CONNECTION:
 208                         case MBA_PORT_UPDATE:
 209                         case MBA_RSCN_UPDATE:
 210                                 DEBUG15(printk("scsi(%ld)%s: Async_event for"
 211                                 " VP[%d], mb = 0x%x, vha=%p\n",
 212                                 vha->host_no, __func__, i, *mb, vha));
 213                                 qla2x00_async_event(vha, rsp, mb);
 214                                 break;
 215                         }
 216                 }
 217                 i++;
 218         }
 219 }
 220
 221 int
 222 qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
 223 {
 224         /*
 225          * Physical port will do most of the abort and recovery work. We can
 226          * just treat it as a loop down
 227          */
 228         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 229                 atomic_set(&vha->loop_state, LOOP_DOWN);
 230                 qla2x00_mark_all_devices_lost(vha, 0);
 231         } else {
 232                 if (!atomic_read(&vha->loop_down_timer))
 233                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 234         }
 235
 236         /*
 237          * To exclusively reset vport, we need to log it out first.  Note: this
 238          * control_vp can fail if ISP reset is already issued, this is
 239          * expected, as the vp would be already logged out due to ISP reset.
 240          */
 241         if (!test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags))
 242                 qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 243
 244         DEBUG15(printk("scsi(%ld): Scheduling enable of Vport %d...\n",
 245             vha->host_no, vha->vp_idx));
 246         return qla24xx_enable_vp(vha);
 247 }
 248
 249 static int
 250 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
 251 {
 252         qla2x00_do_work(vha);
 253
 254         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
 255                 /* VP acquired. complete port configuration */
 256                 qla24xx_configure_vp(vha);
 257                 return 0;
 258         }
 259
 260         if (test_bit(FCPORT_UPDATE_NEEDED, &vha->dpc_flags)) {
 261                 qla2x00_update_fcports(vha);
 262                 clear_bit(FCPORT_UPDATE_NEEDED, &vha->dpc_flags);
 263         }
 264
 265         if ((test_and_clear_bit(RELOGIN_NEEDED, &vha->dpc_flags)) &&
 266                 !test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags) &&
 267                 atomic_read(&vha->loop_state) != LOOP_DOWN) {
 268
 269                 DEBUG(printk("scsi(%ld): qla2x00_port_login()\n",
 270                                                 vha->host_no));
 271                 qla2x00_relogin(vha);
 272
 273                 DEBUG(printk("scsi(%ld): qla2x00_port_login - end\n",
 274                                                         vha->host_no));
 275         }
 276
 277         if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) &&
 278             (!(test_and_set_bit(RESET_ACTIVE, &vha->dpc_flags)))) {
 279                 clear_bit(RESET_ACTIVE, &vha->dpc_flags);
 280         }
 281
 282         if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) {
 283                 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))) {
 284                         qla2x00_loop_resync(vha);
 285                         clear_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags);
 286                 }
 287         }
 288
 289         return 0;
 290 }
 291
 292 void
 293 qla2x00_do_dpc_all_vps(scsi_qla_host_t *vha)
 294 {
 295         int ret;
 296         struct qla_hw_data *ha = vha->hw;
 297         scsi_qla_host_t *vp;
 298         struct scsi_qla_host *tvp;
 299
 300         if (vha->vp_idx)
 301                 return;
 302         if (list_empty(&ha->vp_list))
 303                 return;
 304
 305         clear_bit(VP_DPC_NEEDED, &vha->dpc_flags);
 306
 307         if (!(ha->current_topology & ISP_CFG_F))
 308                 return;
 309
 310         list_for_each_entry_safe(vp, tvp, &ha->vp_list, list) {
 311                 if (vp->vp_idx)
 312                         ret = qla2x00_do_dpc_vp(vp);
 313         }
 314 }
 315
 316 int
 317 qla24xx_vport_create_req_sanity_check(struct fc_vport *fc_vport)
 318 {
 319         scsi_qla_host_t *base_vha = shost_priv(fc_vport->shost);
 320         struct qla_hw_data *ha = base_vha->hw;
 321         scsi_qla_host_t *vha;
 322         uint8_t port_name[WWN_SIZE];
 323
 324         if (fc_vport->roles != FC_PORT_ROLE_FCP_INITIATOR)
 325                 return VPCERR_UNSUPPORTED;
 326
 327         /* Check up the F/W and H/W support NPIV */
 328         if (!ha->flags.npiv_supported)
 329                 return VPCERR_UNSUPPORTED;
 330
 331         /* Check up whether npiv supported switch presented */
 332         if (!(ha->switch_cap & FLOGI_MID_SUPPORT))
 333                 return VPCERR_NO_FABRIC_SUPP;
 334
 335         /* Check up unique WWPN */
 336         u64_to_wwn(fc_vport->port_name, port_name);
 337         if (!memcmp(port_name, base_vha->port_name, WWN_SIZE))
 338                 return VPCERR_BAD_WWN;
 339         vha = qla24xx_find_vhost_by_name(ha, port_name);
 340         if (vha)
 341                 return VPCERR_BAD_WWN;
 342
 343         /* Check up max-npiv-supports */
 344         if (ha->num_vhosts > ha->max_npiv_vports) {
 345                 DEBUG15(printk("scsi(%ld): num_vhosts %ud is bigger than "
 346                     "max_npv_vports %ud.\n", base_vha->host_no,
 347                     ha->num_vhosts, ha->max_npiv_vports));
 348                 return VPCERR_UNSUPPORTED;
 349         }
 350         return 0;
 351 }
 352
 353 scsi_qla_host_t *
 354 qla24xx_create_vhost(struct fc_vport *fc_vport)
 355 {
 356         scsi_qla_host_t *base_vha = shost_priv(fc_vport->shost);
 357         struct qla_hw_data *ha = base_vha->hw;
 358         scsi_qla_host_t *vha;
 359         struct scsi_host_template *sht = &qla2xxx_driver_template;
 360         struct Scsi_Host *host;
 361
 362         vha = qla2x00_create_host(sht, ha);
 363         if (!vha) {
 364                 DEBUG(printk("qla2xxx: scsi_host_alloc() failed for vport\n"));
 365                 return(NULL);
 366         }
 367
 368         host = vha->host;
 369         fc_vport->dd_data = vha;
 370         /* New host info */
 371         u64_to_wwn(fc_vport->node_name, vha->node_name);
 372         u64_to_wwn(fc_vport->port_name, vha->port_name);
 373
 374         vha->fc_vport = fc_vport;
 375         vha->device_flags = 0;
 376         vha->vp_idx = qla24xx_allocate_vp_id(vha);
 377         if (vha->vp_idx > ha->max_npiv_vports) {
 378                 DEBUG15(printk("scsi(%ld): Couldn't allocate vp_id.\n",
 379                         vha->host_no));
 380                 goto create_vhost_failed;
 381         }
 382         vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
 383
 384         vha->dpc_flags = 0L;
 385         set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
 386         set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
 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         host->max_cmd_len = MAX_CMDSZ;
 403         host->max_channel = MAX_BUSES - 1;
 404         host->max_lun = MAX_LUNS;
 405         host->unique_id = host->host_no;
 406         host->max_id = MAX_TARGETS_2200;
 407         host->transportt = qla2xxx_transport_vport_template;
 408
 409         DEBUG15(printk("DEBUG: detect vport hba %ld at address = %p\n",
 410             vha->host_no, vha));
 411
 412         vha->flags.init_done = 1;
 413
 414         mutex_lock(&ha->vport_lock);
 415         set_bit(vha->vp_idx, ha->vp_idx_map);
 416         ha->cur_vport_count++;
 417         mutex_unlock(&ha->vport_lock);
 418
 419         return vha;
 420
 421 create_vhost_failed:
 422         return NULL;
 423 }
 424
 425 static void
 426 qla25xx_free_req_que(struct scsi_qla_host *vha, struct req_que *req)
 427 {
 428         struct qla_hw_data *ha = vha->hw;
 429         uint16_t que_id = req->id;
 430
 431         dma_free_coherent(&ha->pdev->dev, (req->length + 1) *
 432                 sizeof(request_t), req->ring, req->dma);
 433         req->ring = NULL;
 434         req->dma = 0;
 435         if (que_id) {
 436                 ha->req_q_map[que_id] = NULL;
 437                 mutex_lock(&ha->vport_lock);
 438                 clear_bit(que_id, ha->req_qid_map);
 439                 mutex_unlock(&ha->vport_lock);
 440         }
 441         kfree(req);
 442         req = NULL;
 443 }
 444
 445 static void
 446 qla25xx_free_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
 447 {
 448         struct qla_hw_data *ha = vha->hw;
 449         uint16_t que_id = rsp->id;
 450
 451         if (rsp->msix && rsp->msix->have_irq) {
 452                 free_irq(rsp->msix->vector, rsp);
 453                 rsp->msix->have_irq = 0;
 454                 rsp->msix->rsp = NULL;
 455         }
 456         dma_free_coherent(&ha->pdev->dev, (rsp->length + 1) *
 457                 sizeof(response_t), rsp->ring, rsp->dma);
 458         rsp->ring = NULL;
 459         rsp->dma = 0;
 460         if (que_id) {
 461                 ha->rsp_q_map[que_id] = NULL;
 462                 mutex_lock(&ha->vport_lock);
 463                 clear_bit(que_id, ha->rsp_qid_map);
 464                 mutex_unlock(&ha->vport_lock);
 465         }
 466         kfree(rsp);
 467         rsp = NULL;
 468 }
 469
 470 int
 471 qla25xx_delete_req_que(struct scsi_qla_host *vha, struct req_que *req)
 472 {
 473         int ret = -1;
 474
 475         if (req) {
 476                 req->options |= BIT_0;
 477                 ret = qla25xx_init_req_que(vha, req);
 478         }
 479         if (ret == QLA_SUCCESS)
 480                 qla25xx_free_req_que(vha, req);
 481
 482         return ret;
 483 }
 484
 485 int
 486 qla25xx_delete_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
 487 {
 488         int ret = -1;
 489
 490         if (rsp) {
 491                 rsp->options |= BIT_0;
 492                 ret = qla25xx_init_rsp_que(vha, rsp);
 493         }
 494         if (ret == QLA_SUCCESS)
 495                 qla25xx_free_rsp_que(vha, rsp);
 496
 497         return ret;
 498 }
 499
 500 int qla25xx_update_req_que(struct scsi_qla_host *vha, uint8_t que, uint8_t qos)
 501 {
 502         int ret = 0;
 503         struct qla_hw_data *ha = vha->hw;
 504         struct req_que *req = ha->req_q_map[que];
 505
 506         req->options |= BIT_3;
 507         req->qos = qos;
 508         ret = qla25xx_init_req_que(vha, req);
 509         if (ret != QLA_SUCCESS)
 510                 DEBUG2_17(printk(KERN_WARNING "%s failed\n", __func__));
 511         /* restore options bit */
 512         req->options &= ~BIT_3;
 513         return ret;
 514 }
 515
 516
 517 /* Delete all queues for a given vhost */
 518 int
 519 qla25xx_delete_queues(struct scsi_qla_host *vha)
 520 {
 521         int cnt, ret = 0;
 522         struct req_que *req = NULL;
 523         struct rsp_que *rsp = NULL;
 524         struct qla_hw_data *ha = vha->hw;
 525
 526         /* Delete request queues */
 527         for (cnt = 1; cnt < ha->max_req_queues; cnt++) {
 528                 req = ha->req_q_map[cnt];
 529                 if (req) {
 530                         ret = qla25xx_delete_req_que(vha, req);
 531                         if (ret != QLA_SUCCESS) {
 532                                 qla_printk(KERN_WARNING, ha,
 533                                 "Couldn't delete req que %d\n",
 534                                 req->id);
 535                                 return ret;
 536                         }
 537                 }
 538         }
 539
 540         /* Delete response queues */
 541         for (cnt = 1; cnt < ha->max_rsp_queues; cnt++) {
 542                 rsp = ha->rsp_q_map[cnt];
 543                 if (rsp) {
 544                         ret = qla25xx_delete_rsp_que(vha, rsp);
 545                         if (ret != QLA_SUCCESS) {
 546                                 qla_printk(KERN_WARNING, ha,
 547                                 "Couldn't delete rsp que %d\n",
 548                                 rsp->id);
 549                                 return ret;
 550                         }
 551                 }
 552         }
 553         return ret;
 554 }
 555
 556 int
 557 qla25xx_create_req_que(struct qla_hw_data *ha, uint16_t options,
 558         uint8_t vp_idx, uint16_t rid, int rsp_que, uint8_t qos)
 559 {
 560         int ret = 0;
 561         struct req_que *req = NULL;
 562         struct scsi_qla_host *base_vha = pci_get_drvdata(ha->pdev);
 563         uint16_t que_id = 0;
 564         device_reg_t __iomem *reg;
 565         uint32_t cnt;
 566
 567         req = kzalloc(sizeof(struct req_que), GFP_KERNEL);
 568         if (req == NULL) {
 569                 qla_printk(KERN_WARNING, ha, "could not allocate memory"
 570                         "for request que\n");
 571                 goto failed;
 572         }
 573
 574         req->length = REQUEST_ENTRY_CNT_24XX;
 575         req->ring = dma_alloc_coherent(&ha->pdev->dev,
 576                         (req->length + 1) * sizeof(request_t),
 577                         &req->dma, GFP_KERNEL);
 578         if (req->ring == NULL) {
 579                 qla_printk(KERN_WARNING, ha,
 580                 "Memory Allocation failed - request_ring\n");
 581                 goto que_failed;
 582         }
 583
 584         mutex_lock(&ha->vport_lock);
 585         que_id = find_first_zero_bit(ha->req_qid_map, ha->max_req_queues);
 586         if (que_id >= ha->max_req_queues) {
 587                 mutex_unlock(&ha->vport_lock);
 588                 qla_printk(KERN_INFO, ha, "No resources to create "
 589                          "additional request queue\n");
 590                 goto que_failed;
 591         }
 592         set_bit(que_id, ha->req_qid_map);
 593         ha->req_q_map[que_id] = req;
 594         req->rid = rid;
 595         req->vp_idx = vp_idx;
 596         req->qos = qos;
 597
 598         if (rsp_que < 0)
 599                 req->rsp = NULL;
 600         else
 601                 req->rsp = ha->rsp_q_map[rsp_que];
 602         /* Use alternate PCI bus number */
 603         if (MSB(req->rid))
 604                 options |= BIT_4;
 605         /* Use alternate PCI devfn */
 606         if (LSB(req->rid))
 607                 options |= BIT_5;
 608         req->options = options;
 609
 610         for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++)
 611                 req->outstanding_cmds[cnt] = NULL;
 612         req->current_outstanding_cmd = 1;
 613
 614         req->ring_ptr = req->ring;
 615         req->ring_index = 0;
 616         req->cnt = req->length;
 617         req->id = que_id;
 618         reg = ISP_QUE_REG(ha, que_id);
 619         req->max_q_depth = ha->req_q_map[0]->max_q_depth;
 620         mutex_unlock(&ha->vport_lock);
 621
 622         ret = qla25xx_init_req_que(base_vha, req);
 623         if (ret != QLA_SUCCESS) {
 624                 qla_printk(KERN_WARNING, ha, "%s failed\n", __func__);
 625                 mutex_lock(&ha->vport_lock);
 626                 clear_bit(que_id, ha->req_qid_map);
 627                 mutex_unlock(&ha->vport_lock);
 628                 goto que_failed;
 629         }
 630
 631         return req->id;
 632
 633 que_failed:
 634         qla25xx_free_req_que(base_vha, req);
 635 failed:
 636         return 0;
 637 }
 638
 639 static void qla_do_work(struct work_struct *work)
 640 {
 641         struct rsp_que *rsp = container_of(work, struct rsp_que, q_work);
 642         struct scsi_qla_host *vha;
 643
 644         vha = qla25xx_get_host(rsp);
 645         qla24xx_process_response_queue(vha, rsp);
 646 }
 647
 648 /* create response queue */
 649 int
 650 qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
 651         uint8_t vp_idx, uint16_t rid, int req)
 652 {
 653         int ret = 0;
 654         struct rsp_que *rsp = NULL;
 655         struct scsi_qla_host *base_vha = pci_get_drvdata(ha->pdev);
 656         uint16_t que_id = 0;
 657         device_reg_t __iomem *reg;
 658
 659         rsp = kzalloc(sizeof(struct rsp_que), GFP_KERNEL);
 660         if (rsp == NULL) {
 661                 qla_printk(KERN_WARNING, ha, "could not allocate memory for"
 662                                 " response que\n");
 663                 goto failed;
 664         }
 665
 666         rsp->length = RESPONSE_ENTRY_CNT_MQ;
 667         rsp->ring = dma_alloc_coherent(&ha->pdev->dev,
 668                         (rsp->length + 1) * sizeof(response_t),
 669                         &rsp->dma, GFP_KERNEL);
 670         if (rsp->ring == NULL) {
 671                 qla_printk(KERN_WARNING, ha,
 672                 "Memory Allocation failed - response_ring\n");
 673                 goto que_failed;
 674         }
 675
 676         mutex_lock(&ha->vport_lock);
 677         que_id = find_first_zero_bit(ha->rsp_qid_map, ha->max_rsp_queues);
 678         if (que_id >= ha->max_rsp_queues) {
 679                 mutex_unlock(&ha->vport_lock);
 680                 qla_printk(KERN_INFO, ha, "No resources to create "
 681                          "additional response queue\n");
 682                 goto que_failed;
 683         }
 684         set_bit(que_id, ha->rsp_qid_map);
 685
 686         if (ha->flags.msix_enabled)
 687                 rsp->msix = &ha->msix_entries[que_id + 1];
 688         else
 689                 qla_printk(KERN_WARNING, ha, "msix not enabled\n");
 690
 691         ha->rsp_q_map[que_id] = rsp;
 692         rsp->rid = rid;
 693         rsp->vp_idx = vp_idx;
 694         rsp->hw = ha;
 695         /* Use alternate PCI bus number */
 696         if (MSB(rsp->rid))
 697                 options |= BIT_4;
 698         /* Use alternate PCI devfn */
 699         if (LSB(rsp->rid))
 700                 options |= BIT_5;
 701         rsp->options = options;
 702         rsp->id = que_id;
 703         reg = ISP_QUE_REG(ha, que_id);
 704         rsp->rsp_q_in = &reg->isp25mq.rsp_q_in;
 705         rsp->rsp_q_out = &reg->isp25mq.rsp_q_out;
 706         mutex_unlock(&ha->vport_lock);
 707
 708         ret = qla25xx_request_irq(rsp);
 709         if (ret)
 710                 goto que_failed;
 711
 712         ret = qla25xx_init_rsp_que(base_vha, rsp);
 713         if (ret != QLA_SUCCESS) {
 714                 qla_printk(KERN_WARNING, ha, "%s failed\n", __func__);
 715                 mutex_lock(&ha->vport_lock);
 716                 clear_bit(que_id, ha->rsp_qid_map);
 717                 mutex_unlock(&ha->vport_lock);
 718                 goto que_failed;
 719         }
 720         if (req >= 0)
 721                 rsp->req = ha->req_q_map[req];
 722         else
 723                 rsp->req = NULL;
 724
 725         qla2x00_init_response_q_entries(rsp);
 726         if (rsp->hw->wq)
 727                 INIT_WORK(&rsp->q_work, qla_do_work);
 728         return rsp->id;
 729
 730 que_failed:
 731         qla25xx_free_rsp_que(base_vha, rsp);
 732 failed:
 733         return 0;
 734 }
 735
 736 int
 737 qla25xx_create_queues(struct scsi_qla_host *vha, uint8_t qos)
 738 {
 739         uint16_t options = 0;
 740         uint8_t ret = 0;
 741         struct qla_hw_data *ha = vha->hw;
 742         struct rsp_que *rsp;
 743
 744         options |= BIT_1;
 745         ret = qla25xx_create_rsp_que(ha, options, vha->vp_idx, 0, -1);
 746         if (!ret) {
 747                 qla_printk(KERN_WARNING, ha, "Response Que create failed\n");
 748                 return ret;
 749         } else
 750                 qla_printk(KERN_INFO, ha, "Response Que:%d created.\n", ret);
 751         rsp = ha->rsp_q_map[ret];
 752
 753         options = 0;
 754         if (qos & BIT_7)
 755                 options |= BIT_8;
 756         ret = qla25xx_create_req_que(ha, options, vha->vp_idx, 0, ret,
 757                                         qos & ~BIT_7);
 758         if (ret) {
 759                 vha->req = ha->req_q_map[ret];
 760                 qla_printk(KERN_INFO, ha, "Request Que:%d created.\n", ret);
 761         } else
 762                 qla_printk(KERN_WARNING, ha, "Request Que create failed\n");
 763         rsp->req = ha->req_q_map[ret];
 764
 765         return ret;
 766 }