hw/scsi-bus.c

   1 #include "hw.h"
   2 #include "qemu-error.h"
   3 #include "scsi.h"
   4 #include "scsi-defs.h"
   5 #include "qdev.h"
   6 #include "blockdev.h"
   7 #include "trace.h"
   8 #include "dma.h"
   9
  10 static char *scsibus_get_dev_path(DeviceState *dev);
  11 static char *scsibus_get_fw_dev_path(DeviceState *dev);
  12 static int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf);
  13 static void scsi_req_dequeue(SCSIRequest *req);
  14
  15 static Property scsi_props[] = {
  16     DEFINE_PROP_UINT32("channel", SCSIDevice, channel, 0),
  17     DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1),
  18     DEFINE_PROP_UINT32("lun", SCSIDevice, lun, -1),
  19     DEFINE_PROP_END_OF_LIST(),
  20 };
  21
  22 static void scsi_bus_class_init(ObjectClass *klass, void *data)
  23 {
  24     BusClass *k = BUS_CLASS(klass);
  25
  26     k->get_dev_path = scsibus_get_dev_path;
  27     k->get_fw_dev_path = scsibus_get_fw_dev_path;
  28 }
  29
  30 static const TypeInfo scsi_bus_info = {
  31     .name = TYPE_SCSI_BUS,
  32     .parent = TYPE_BUS,
  33     .instance_size = sizeof(SCSIBus),
  34     .class_init = scsi_bus_class_init,
  35 };
  36 static int next_scsi_bus;
  37
  38 static int scsi_device_init(SCSIDevice *s)
  39 {
  40     SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
  41     if (sc->init) {
  42         return sc->init(s);
  43     }
  44     return 0;
  45 }
  46
  47 static void scsi_device_destroy(SCSIDevice *s)
  48 {
  49     SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
  50     if (sc->destroy) {
  51         sc->destroy(s);
  52     }
  53 }
  54
  55 static SCSIRequest *scsi_device_alloc_req(SCSIDevice *s, uint32_t tag, uint32_t lun,
  56                                           uint8_t *buf, void *hba_private)
  57 {
  58     SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
  59     if (sc->alloc_req) {
  60         return sc->alloc_req(s, tag, lun, buf, hba_private);
  61     }
  62
  63     return NULL;
  64 }
  65
  66 static void scsi_device_unit_attention_reported(SCSIDevice *s)
  67 {
  68     SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
  69     if (sc->unit_attention_reported) {
  70         sc->unit_attention_reported(s);
  71     }
  72 }
  73
  74 /* Create a scsi bus, and attach devices to it.  */
  75 void scsi_bus_new(SCSIBus *bus, DeviceState *host, const SCSIBusInfo *info)
  76 {
  77     qbus_create_inplace(&bus->qbus, TYPE_SCSI_BUS, host, NULL);
  78     bus->busnr = next_scsi_bus++;
  79     bus->info = info;
  80     bus->qbus.allow_hotplug = 1;
  81 }
  82
  83 static void scsi_dma_restart_bh(void *opaque)
  84 {
  85     SCSIDevice *s = opaque;
  86     SCSIRequest *req, *next;
  87
  88     qemu_bh_delete(s->bh);
  89     s->bh = NULL;
  90
  91     QTAILQ_FOREACH_SAFE(req, &s->requests, next, next) {
  92         scsi_req_ref(req);
  93         if (req->retry) {
  94             req->retry = false;
  95             switch (req->cmd.mode) {
  96             case SCSI_XFER_FROM_DEV:
  97             case SCSI_XFER_TO_DEV:
  98                 scsi_req_continue(req);
  99                 break;
 100             case SCSI_XFER_NONE:
 101                 assert(!req->sg);
 102                 scsi_req_dequeue(req);
 103                 scsi_req_enqueue(req);
 104                 break;
 105             }
 106         }
 107         scsi_req_unref(req);
 108     }
 109 }
 110
 111 void scsi_req_retry(SCSIRequest *req)
 112 {
 113     /* No need to save a reference, because scsi_dma_restart_bh just
 114      * looks at the request list.  */
 115     req->retry = true;
 116 }
 117
 118 static void scsi_dma_restart_cb(void *opaque, int running, RunState state)
 119 {
 120     SCSIDevice *s = opaque;
 121
 122     if (!running) {
 123         return;
 124     }
 125     if (!s->bh) {
 126         s->bh = qemu_bh_new(scsi_dma_restart_bh, s);
 127         qemu_bh_schedule(s->bh);
 128     }
 129 }
 130
 131 static int scsi_qdev_init(DeviceState *qdev)
 132 {
 133     SCSIDevice *dev = SCSI_DEVICE(qdev);
 134     SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
 135     SCSIDevice *d;
 136     int rc = -1;
 137
 138     if (dev->channel > bus->info->max_channel) {
 139         error_report("bad scsi channel id: %d", dev->channel);
 140         goto err;
 141     }
 142     if (dev->id != -1 && dev->id > bus->info->max_target) {
 143         error_report("bad scsi device id: %d", dev->id);
 144         goto err;
 145     }
 146     if (dev->lun != -1 && dev->lun > bus->info->max_lun) {
 147         error_report("bad scsi device lun: %d", dev->lun);
 148         goto err;
 149     }
 150
 151     if (dev->id == -1) {
 152         int id = -1;
 153         if (dev->lun == -1) {
 154             dev->lun = 0;
 155         }
 156         do {
 157             d = scsi_device_find(bus, dev->channel, ++id, dev->lun);
 158         } while (d && d->lun == dev->lun && id < bus->info->max_target);
 159         if (d && d->lun == dev->lun) {
 160             error_report("no free target");
 161             goto err;
 162         }
 163         dev->id = id;
 164     } else if (dev->lun == -1) {
 165         int lun = -1;
 166         do {
 167             d = scsi_device_find(bus, dev->channel, dev->id, ++lun);
 168         } while (d && d->lun == lun && lun < bus->info->max_lun);
 169         if (d && d->lun == lun) {
 170             error_report("no free lun");
 171             goto err;
 172         }
 173         dev->lun = lun;
 174     } else {
 175         d = scsi_device_find(bus, dev->channel, dev->id, dev->lun);
 176         assert(d);
 177         if (d->lun == dev->lun && dev != d) {
 178             qdev_free(&d->qdev);
 179         }
 180     }
 181
 182     QTAILQ_INIT(&dev->requests);
 183     rc = scsi_device_init(dev);
 184     if (rc == 0) {
 185         dev->vmsentry = qemu_add_vm_change_state_handler(scsi_dma_restart_cb,
 186                                                          dev);
 187     }
 188
 189     if (bus->info->hotplug) {
 190         bus->info->hotplug(bus, dev);
 191     }
 192
 193 err:
 194     return rc;
 195 }
 196
 197 static int scsi_qdev_exit(DeviceState *qdev)
 198 {
 199     SCSIDevice *dev = SCSI_DEVICE(qdev);
 200
 201     if (dev->vmsentry) {
 202         qemu_del_vm_change_state_handler(dev->vmsentry);
 203     }
 204     scsi_device_destroy(dev);
 205     return 0;
 206 }
 207
 208 /* handle legacy '-drive if=scsi,...' cmd line args */
 209 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv,
 210                                       int unit, bool removable, int bootindex)
 211 {
 212     const char *driver;
 213     DeviceState *dev;
 214
 215     driver = bdrv_is_sg(bdrv) ? "scsi-generic" : "scsi-disk";
 216     dev = qdev_create(&bus->qbus, driver);
 217     qdev_prop_set_uint32(dev, "scsi-id", unit);
 218     if (bootindex >= 0) {
 219         qdev_prop_set_int32(dev, "bootindex", bootindex);
 220     }
 221     if (object_property_find(OBJECT(dev), "removable", NULL)) {
 222         qdev_prop_set_bit(dev, "removable", removable);
 223     }
 224     if (qdev_prop_set_drive(dev, "drive", bdrv) < 0) {
 225         qdev_free(dev);
 226         return NULL;
 227     }
 228     if (qdev_init(dev) < 0)
 229         return NULL;
 230     return SCSI_DEVICE(dev);
 231 }
 232
 233 int scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
 234 {
 235     Location loc;
 236     DriveInfo *dinfo;
 237     int res = 0, unit;
 238
 239     loc_push_none(&loc);
 240     for (unit = 0; unit <= bus->info->max_target; unit++) {
 241         dinfo = drive_get(IF_SCSI, bus->busnr, unit);
 242         if (dinfo == NULL) {
 243             continue;
 244         }
 245         qemu_opts_loc_restore(dinfo->opts);
 246         if (!scsi_bus_legacy_add_drive(bus, dinfo->bdrv, unit, false, -1)) {
 247             res = -1;
 248             break;
 249         }
 250     }
 251     loc_pop(&loc);
 252     return res;
 253 }
 254
 255 static int32_t scsi_invalid_field(SCSIRequest *req, uint8_t *buf)
 256 {
 257     scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD));
 258     scsi_req_complete(req, CHECK_CONDITION);
 259     return 0;
 260 }
 261
 262 static const struct SCSIReqOps reqops_invalid_field = {
 263     .size         = sizeof(SCSIRequest),
 264     .send_command = scsi_invalid_field
 265 };
 266
 267 /* SCSIReqOps implementation for invalid commands.  */
 268
 269 static int32_t scsi_invalid_command(SCSIRequest *req, uint8_t *buf)
 270 {
 271     scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE));
 272     scsi_req_complete(req, CHECK_CONDITION);
 273     return 0;
 274 }
 275
 276 static const struct SCSIReqOps reqops_invalid_opcode = {
 277     .size         = sizeof(SCSIRequest),
 278     .send_command = scsi_invalid_command
 279 };
 280
 281 /* SCSIReqOps implementation for unit attention conditions.  */
 282
 283 static int32_t scsi_unit_attention(SCSIRequest *req, uint8_t *buf)
 284 {
 285     if (req->dev && req->dev->unit_attention.key == UNIT_ATTENTION) {
 286         scsi_req_build_sense(req, req->dev->unit_attention);
 287     } else if (req->bus->unit_attention.key == UNIT_ATTENTION) {
 288         scsi_req_build_sense(req, req->bus->unit_attention);
 289     }
 290     scsi_req_complete(req, CHECK_CONDITION);
 291     return 0;
 292 }
 293
 294 static const struct SCSIReqOps reqops_unit_attention = {
 295     .size         = sizeof(SCSIRequest),
 296     .send_command = scsi_unit_attention
 297 };
 298
 299 /* SCSIReqOps implementation for REPORT LUNS and for commands sent to
 300    an invalid LUN.  */
 301
 302 typedef struct SCSITargetReq SCSITargetReq;
 303
 304 struct SCSITargetReq {
 305     SCSIRequest req;
 306     int len;
 307     uint8_t buf[2056];
 308 };
 309
 310 static void store_lun(uint8_t *outbuf, int lun)
 311 {
 312     if (lun < 256) {
 313         outbuf[1] = lun;
 314         return;
 315     }
 316     outbuf[1] = (lun & 255);
 317     outbuf[0] = (lun >> 8) | 0x40;
 318 }
 319
 320 static bool scsi_target_emulate_report_luns(SCSITargetReq *r)
 321 {
 322     BusChild *kid;
 323     int i, len, n;
 324     int channel, id;
 325     bool found_lun0;
 326
 327     if (r->req.cmd.xfer < 16) {
 328         return false;
 329     }
 330     if (r->req.cmd.buf[2] > 2) {
 331         return false;
 332     }
 333     channel = r->req.dev->channel;
 334     id = r->req.dev->id;
 335     found_lun0 = false;
 336     n = 0;
 337     QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) {
 338         DeviceState *qdev = kid->child;
 339         SCSIDevice *dev = SCSI_DEVICE(qdev);
 340
 341         if (dev->channel == channel && dev->id == id) {
 342             if (dev->lun == 0) {
 343                 found_lun0 = true;
 344             }
 345             n += 8;
 346         }
 347     }
 348     if (!found_lun0) {
 349         n += 8;
 350     }
 351     len = MIN(n + 8, r->req.cmd.xfer & ~7);
 352     if (len > sizeof(r->buf)) {
 353         /* TODO: > 256 LUNs? */
 354         return false;
 355     }
 356
 357     memset(r->buf, 0, len);
 358     stl_be_p(&r->buf, n);
 359     i = found_lun0 ? 8 : 16;
 360     QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) {
 361         DeviceState *qdev = kid->child;
 362         SCSIDevice *dev = SCSI_DEVICE(qdev);
 363
 364         if (dev->channel == channel && dev->id == id) {
 365             store_lun(&r->buf[i], dev->lun);
 366             i += 8;
 367         }
 368     }
 369     assert(i == n + 8);
 370     r->len = len;
 371     return true;
 372 }
 373
 374 static bool scsi_target_emulate_inquiry(SCSITargetReq *r)
 375 {
 376     assert(r->req.dev->lun != r->req.lun);
 377     if (r->req.cmd.buf[1] & 0x2) {
 378         /* Command support data - optional, not implemented */
 379         return false;
 380     }
 381
 382     if (r->req.cmd.buf[1] & 0x1) {
 383         /* Vital product data */
 384         uint8_t page_code = r->req.cmd.buf[2];
 385         r->buf[r->len++] = page_code ; /* this page */
 386         r->buf[r->len++] = 0x00;
 387
 388         switch (page_code) {
 389         case 0x00: /* Supported page codes, mandatory */
 390         {
 391             int pages;
 392             pages = r->len++;
 393             r->buf[r->len++] = 0x00; /* list of supported pages (this page) */
 394             r->buf[pages] = r->len - pages - 1; /* number of pages */
 395             break;
 396         }
 397         default:
 398             return false;
 399         }
 400         /* done with EVPD */
 401         assert(r->len < sizeof(r->buf));
 402         r->len = MIN(r->req.cmd.xfer, r->len);
 403         return true;
 404     }
 405
 406     /* Standard INQUIRY data */
 407     if (r->req.cmd.buf[2] != 0) {
 408         return false;
 409     }
 410
 411     /* PAGE CODE == 0 */
 412     r->len = MIN(r->req.cmd.xfer, 36);
 413     memset(r->buf, 0, r->len);
 414     if (r->req.lun != 0) {
 415         r->buf[0] = TYPE_NO_LUN;
 416     } else {
 417         r->buf[0] = TYPE_NOT_PRESENT | TYPE_INACTIVE;
 418         r->buf[2] = 5; /* Version */
 419         r->buf[3] = 2 | 0x10; /* HiSup, response data format */
 420         r->buf[4] = r->len - 5; /* Additional Length = (Len - 1) - 4 */
 421         r->buf[7] = 0x10 | (r->req.bus->info->tcq ? 0x02 : 0); /* Sync, TCQ.  */
 422         memcpy(&r->buf[8], "QEMU    ", 8);
 423         memcpy(&r->buf[16], "QEMU TARGET     ", 16);
 424         pstrcpy((char *) &r->buf[32], 4, qemu_get_version());
 425     }
 426     return true;
 427 }
 428
 429 static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf)
 430 {
 431     SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
 432
 433     switch (buf[0]) {
 434     case REPORT_LUNS:
 435         if (!scsi_target_emulate_report_luns(r)) {
 436             goto illegal_request;
 437         }
 438         break;
 439     case INQUIRY:
 440         if (!scsi_target_emulate_inquiry(r)) {
 441             goto illegal_request;
 442         }
 443         break;
 444     case REQUEST_SENSE:
 445         r->len = scsi_device_get_sense(r->req.dev, r->buf,
 446                                        MIN(req->cmd.xfer, sizeof r->buf),
 447                                        (req->cmd.buf[1] & 1) == 0);
 448         if (r->req.dev->sense_is_ua) {
 449             scsi_device_unit_attention_reported(req->dev);
 450             r->req.dev->sense_len = 0;
 451             r->req.dev->sense_is_ua = false;
 452         }
 453         break;
 454     default:
 455         scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED));
 456         scsi_req_complete(req, CHECK_CONDITION);
 457         return 0;
 458     illegal_request:
 459         scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD));
 460         scsi_req_complete(req, CHECK_CONDITION);
 461         return 0;
 462     }
 463
 464     if (!r->len) {
 465         scsi_req_complete(req, GOOD);
 466     }
 467     return r->len;
 468 }
 469
 470 static void scsi_target_read_data(SCSIRequest *req)
 471 {
 472     SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
 473     uint32_t n;
 474
 475     n = r->len;
 476     if (n > 0) {
 477         r->len = 0;
 478         scsi_req_data(&r->req, n);
 479     } else {
 480         scsi_req_complete(&r->req, GOOD);
 481     }
 482 }
 483
 484 static uint8_t *scsi_target_get_buf(SCSIRequest *req)
 485 {
 486     SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
 487
 488     return r->buf;
 489 }
 490
 491 static const struct SCSIReqOps reqops_target_command = {
 492     .size         = sizeof(SCSITargetReq),
 493     .send_command = scsi_target_send_command,
 494     .read_data    = scsi_target_read_data,
 495     .get_buf      = scsi_target_get_buf,
 496 };
 497
 498
 499 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
 500                             uint32_t tag, uint32_t lun, void *hba_private)
 501 {
 502     SCSIRequest *req;
 503
 504     req = g_malloc0(reqops->size);
 505     req->refcount = 1;
 506     req->bus = scsi_bus_from_device(d);
 507     req->dev = d;
 508     req->tag = tag;
 509     req->lun = lun;
 510     req->hba_private = hba_private;
 511     req->status = -1;
 512     req->sense_len = 0;
 513     req->ops = reqops;
 514     trace_scsi_req_alloc(req->dev->id, req->lun, req->tag);
 515     return req;
 516 }
 517
 518 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
 519                           uint8_t *buf, void *hba_private)
 520 {
 521     SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
 522     SCSIRequest *req;
 523     SCSICommand cmd;
 524
 525     if (scsi_req_parse(&cmd, d, buf) != 0) {
 526         trace_scsi_req_parse_bad(d->id, lun, tag, buf[0]);
 527         req = scsi_req_alloc(&reqops_invalid_opcode, d, tag, lun, hba_private);
 528     } else {
 529         trace_scsi_req_parsed(d->id, lun, tag, buf[0],
 530                               cmd.mode, cmd.xfer);
 531         if (cmd.lba != -1) {
 532             trace_scsi_req_parsed_lba(d->id, lun, tag, buf[0],
 533                                       cmd.lba);
 534         }
 535
 536         if (cmd.xfer > INT32_MAX) {
 537             req = scsi_req_alloc(&reqops_invalid_field, d, tag, lun, hba_private);
 538         } else if ((d->unit_attention.key == UNIT_ATTENTION ||
 539                    bus->unit_attention.key == UNIT_ATTENTION) &&
 540                   (buf[0] != INQUIRY &&
 541                    buf[0] != REPORT_LUNS &&
 542                    buf[0] != GET_CONFIGURATION &&
 543                    buf[0] != GET_EVENT_STATUS_NOTIFICATION &&
 544
 545                    /*
 546                     * If we already have a pending unit attention condition,
 547                     * report this one before triggering another one.
 548                     */
 549                    !(buf[0] == REQUEST_SENSE && d->sense_is_ua))) {
 550             req = scsi_req_alloc(&reqops_unit_attention, d, tag, lun,
 551                                  hba_private);
 552         } else if (lun != d->lun ||
 553                    buf[0] == REPORT_LUNS ||
 554                    (buf[0] == REQUEST_SENSE && d->sense_len)) {
 555             req = scsi_req_alloc(&reqops_target_command, d, tag, lun,
 556                                  hba_private);
 557         } else {
 558             req = scsi_device_alloc_req(d, tag, lun, buf, hba_private);
 559         }
 560     }
 561
 562     req->cmd = cmd;
 563     req->resid = req->cmd.xfer;
 564
 565     switch (buf[0]) {
 566     case INQUIRY:
 567         trace_scsi_inquiry(d->id, lun, tag, cmd.buf[1], cmd.buf[2]);
 568         break;
 569     case TEST_UNIT_READY:
 570         trace_scsi_test_unit_ready(d->id, lun, tag);
 571         break;
 572     case REPORT_LUNS:
 573         trace_scsi_report_luns(d->id, lun, tag);
 574         break;
 575     case REQUEST_SENSE:
 576         trace_scsi_request_sense(d->id, lun, tag);
 577         break;
 578     default:
 579         break;
 580     }
 581
 582     return req;
 583 }
 584
 585 uint8_t *scsi_req_get_buf(SCSIRequest *req)
 586 {
 587     return req->ops->get_buf(req);
 588 }
 589
 590 static void scsi_clear_unit_attention(SCSIRequest *req)
 591 {
 592     SCSISense *ua;
 593     if (req->dev->unit_attention.key != UNIT_ATTENTION &&
 594         req->bus->unit_attention.key != UNIT_ATTENTION) {
 595         return;
 596     }
 597
 598     /*
 599      * If an INQUIRY command enters the enabled command state,
 600      * the device server shall [not] clear any unit attention condition;
 601      * See also MMC-6, paragraphs 6.5 and 6.6.2.
 602      */
 603     if (req->cmd.buf[0] == INQUIRY ||
 604         req->cmd.buf[0] == GET_CONFIGURATION ||
 605         req->cmd.buf[0] == GET_EVENT_STATUS_NOTIFICATION) {
 606         return;
 607     }
 608
 609     if (req->dev->unit_attention.key == UNIT_ATTENTION) {
 610         ua = &req->dev->unit_attention;
 611     } else {
 612         ua = &req->bus->unit_attention;
 613     }
 614
 615     /*
 616      * If a REPORT LUNS command enters the enabled command state, [...]
 617      * the device server shall clear any pending unit attention condition
 618      * with an additional sense code of REPORTED LUNS DATA HAS CHANGED.
 619      */
 620     if (req->cmd.buf[0] == REPORT_LUNS &&
 621         !(ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc &&
 622           ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq)) {
 623         return;
 624     }
 625
 626     *ua = SENSE_CODE(NO_SENSE);
 627 }
 628
 629 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len)
 630 {
 631     int ret;
 632
 633     assert(len >= 14);
 634     if (!req->sense_len) {
 635         return 0;
 636     }
 637
 638     ret = scsi_build_sense(req->sense, req->sense_len, buf, len, true);
 639
 640     /*
 641      * FIXME: clearing unit attention conditions upon autosense should be done
 642      * only if the UA_INTLCK_CTRL field in the Control mode page is set to 00b
 643      * (SAM-5, 5.14).
 644      *
 645      * We assume UA_INTLCK_CTRL to be 00b for HBAs that support autosense, and
 646      * 10b for HBAs that do not support it (do not call scsi_req_get_sense).
 647      * Here we handle unit attention clearing for UA_INTLCK_CTRL == 00b.
 648      */
 649     if (req->dev->sense_is_ua) {
 650         scsi_device_unit_attention_reported(req->dev);
 651         req->dev->sense_len = 0;
 652         req->dev->sense_is_ua = false;
 653     }
 654     return ret;
 655 }
 656
 657 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed)
 658 {
 659     return scsi_build_sense(dev->sense, dev->sense_len, buf, len, fixed);
 660 }
 661
 662 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense)
 663 {
 664     trace_scsi_req_build_sense(req->dev->id, req->lun, req->tag,
 665                                sense.key, sense.asc, sense.ascq);
 666     memset(req->sense, 0, 18);
 667     req->sense[0] = 0x70;
 668     req->sense[2] = sense.key;
 669     req->sense[7] = 10;
 670     req->sense[12] = sense.asc;
 671     req->sense[13] = sense.ascq;
 672     req->sense_len = 18;
 673 }
 674
 675 static void scsi_req_enqueue_internal(SCSIRequest *req)
 676 {
 677     assert(!req->enqueued);
 678     scsi_req_ref(req);
 679     if (req->bus->info->get_sg_list) {
 680         req->sg = req->bus->info->get_sg_list(req);
 681     } else {
 682         req->sg = NULL;
 683     }
 684     req->enqueued = true;
 685     QTAILQ_INSERT_TAIL(&req->dev->requests, req, next);
 686 }
 687
 688 int32_t scsi_req_enqueue(SCSIRequest *req)
 689 {
 690     int32_t rc;
 691
 692     assert(!req->retry);
 693     scsi_req_enqueue_internal(req);
 694     scsi_req_ref(req);
 695     rc = req->ops->send_command(req, req->cmd.buf);
 696     scsi_req_unref(req);
 697     return rc;
 698 }
 699
 700 static void scsi_req_dequeue(SCSIRequest *req)
 701 {
 702     trace_scsi_req_dequeue(req->dev->id, req->lun, req->tag);
 703     req->retry = false;
 704     if (req->enqueued) {
 705         QTAILQ_REMOVE(&req->dev->requests, req, next);
 706         req->enqueued = false;
 707         scsi_req_unref(req);
 708     }
 709 }
 710
 711 static int scsi_get_performance_length(int num_desc, int type, int data_type)
 712 {
 713     /* MMC-6, paragraph 6.7.  */
 714     switch (type) {
 715     case 0:
 716         if ((data_type & 3) == 0) {
 717             /* Each descriptor is as in Table 295 - Nominal performance.  */
 718             return 16 * num_desc + 8;
 719         } else {
 720             /* Each descriptor is as in Table 296 - Exceptions.  */
 721             return 6 * num_desc + 8;
 722         }
 723     case 1:
 724     case 4:
 725     case 5:
 726         return 8 * num_desc + 8;
 727     case 2:
 728         return 2048 * num_desc + 8;
 729     case 3:
 730         return 16 * num_desc + 8;
 731     default:
 732         return 8;
 733     }
 734 }
 735
 736 static int ata_passthrough_xfer_unit(SCSIDevice *dev, uint8_t *buf)
 737 {
 738     int byte_block = (buf[2] >> 2) & 0x1;
 739     int type = (buf[2] >> 4) & 0x1;
 740     int xfer_unit;
 741
 742     if (byte_block) {
 743         if (type) {
 744             xfer_unit = dev->blocksize;
 745         } else {
 746             xfer_unit = 512;
 747         }
 748     } else {
 749         xfer_unit = 1;
 750     }
 751
 752     return xfer_unit;
 753 }
 754
 755 static int ata_passthrough_12_xfer_size(SCSIDevice *dev, uint8_t *buf)
 756 {
 757     int length = buf[2] & 0x3;
 758     int xfer;
 759     int unit = ata_passthrough_xfer_unit(dev, buf);
 760
 761     switch (length) {
 762     case 0:
 763     case 3: /* USB-specific.  */
 764     default:
 765         xfer = 0;
 766         break;
 767     case 1:
 768         xfer = buf[3];
 769         break;
 770     case 2:
 771         xfer = buf[4];
 772         break;
 773     }
 774
 775     return xfer * unit;
 776 }
 777
 778 static int ata_passthrough_16_xfer_size(SCSIDevice *dev, uint8_t *buf)
 779 {
 780     int extend = buf[1] & 0x1;
 781     int length = buf[2] & 0x3;
 782     int xfer;
 783     int unit = ata_passthrough_xfer_unit(dev, buf);
 784
 785     switch (length) {
 786     case 0:
 787     case 3: /* USB-specific.  */
 788     default:
 789         xfer = 0;
 790         break;
 791     case 1:
 792         xfer = buf[4];
 793         xfer |= (extend ? buf[3] << 8 : 0);
 794         break;
 795     case 2:
 796         xfer = buf[6];
 797         xfer |= (extend ? buf[5] << 8 : 0);
 798         break;
 799     }
 800
 801     return xfer * unit;
 802 }
 803
 804 static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
 805 {
 806     switch (buf[0] >> 5) {
 807     case 0:
 808         cmd->xfer = buf[4];
 809         break;
 810     case 1:
 811     case 2:
 812         cmd->xfer = lduw_be_p(&buf[7]);
 813         break;
 814     case 4:
 815         cmd->xfer = ldl_be_p(&buf[10]) & 0xffffffffULL;
 816         break;
 817     case 5:
 818         cmd->xfer = ldl_be_p(&buf[6]) & 0xffffffffULL;
 819         break;
 820     default:
 821         return -1;
 822     }
 823
 824     switch (buf[0]) {
 825     case TEST_UNIT_READY:
 826     case REWIND:
 827     case START_STOP:
 828     case SET_CAPACITY:
 829     case WRITE_FILEMARKS:
 830     case WRITE_FILEMARKS_16:
 831     case SPACE:
 832     case RESERVE:
 833     case RELEASE:
 834     case ERASE:
 835     case ALLOW_MEDIUM_REMOVAL:
 836     case VERIFY_10:
 837     case SEEK_10:
 838     case SYNCHRONIZE_CACHE:
 839     case SYNCHRONIZE_CACHE_16:
 840     case LOCATE_16:
 841     case LOCK_UNLOCK_CACHE:
 842     case SET_CD_SPEED:
 843     case SET_LIMITS:
 844     case WRITE_LONG_10:
 845     case UPDATE_BLOCK:
 846     case RESERVE_TRACK:
 847     case SET_READ_AHEAD:
 848     case PRE_FETCH:
 849     case PRE_FETCH_16:
 850     case ALLOW_OVERWRITE:
 851         cmd->xfer = 0;
 852         break;
 853     case MODE_SENSE:
 854         break;
 855     case WRITE_SAME_10:
 856     case WRITE_SAME_16:
 857         cmd->xfer = dev->blocksize;
 858         break;
 859     case READ_CAPACITY_10:
 860         cmd->xfer = 8;
 861         break;
 862     case READ_BLOCK_LIMITS:
 863         cmd->xfer = 6;
 864         break;
 865     case SEND_VOLUME_TAG:
 866         /* GPCMD_SET_STREAMING from multimedia commands.  */
 867         if (dev->type == TYPE_ROM) {
 868             cmd->xfer = buf[10] | (buf[9] << 8);
 869         } else {
 870             cmd->xfer = buf[9] | (buf[8] << 8);
 871         }
 872         break;
 873     case WRITE_6:
 874         /* length 0 means 256 blocks */
 875         if (cmd->xfer == 0) {
 876             cmd->xfer = 256;
 877         }
 878     case WRITE_10:
 879     case WRITE_VERIFY_10:
 880     case WRITE_12:
 881     case WRITE_VERIFY_12:
 882     case WRITE_16:
 883     case WRITE_VERIFY_16:
 884         cmd->xfer *= dev->blocksize;
 885         break;
 886     case READ_6:
 887     case READ_REVERSE:
 888         /* length 0 means 256 blocks */
 889         if (cmd->xfer == 0) {
 890             cmd->xfer = 256;
 891         }
 892     case READ_10:
 893     case RECOVER_BUFFERED_DATA:
 894     case READ_12:
 895     case READ_16:
 896         cmd->xfer *= dev->blocksize;
 897         break;
 898     case FORMAT_UNIT:
 899         /* MMC mandates the parameter list to be 12-bytes long.  Parameters
 900          * for block devices are restricted to the header right now.  */
 901         if (dev->type == TYPE_ROM && (buf[1] & 16)) {
 902             cmd->xfer = 12;
 903         } else {
 904             cmd->xfer = (buf[1] & 16) == 0 ? 0 : (buf[1] & 32 ? 8 : 4);
 905         }
 906         break;
 907     case INQUIRY:
 908     case RECEIVE_DIAGNOSTIC:
 909     case SEND_DIAGNOSTIC:
 910         cmd->xfer = buf[4] | (buf[3] << 8);
 911         break;
 912     case READ_CD:
 913     case READ_BUFFER:
 914     case WRITE_BUFFER:
 915     case SEND_CUE_SHEET:
 916         cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16);
 917         break;
 918     case PERSISTENT_RESERVE_OUT:
 919         cmd->xfer = ldl_be_p(&buf[5]) & 0xffffffffULL;
 920         break;
 921     case ERASE_12:
 922         if (dev->type == TYPE_ROM) {
 923             /* MMC command GET PERFORMANCE.  */
 924             cmd->xfer = scsi_get_performance_length(buf[9] | (buf[8] << 8),
 925                                                     buf[10], buf[1] & 0x1f);
 926         }
 927         break;
 928     case MECHANISM_STATUS:
 929     case READ_DVD_STRUCTURE:
 930     case SEND_DVD_STRUCTURE:
 931     case MAINTENANCE_OUT:
 932     case MAINTENANCE_IN:
 933         if (dev->type == TYPE_ROM) {
 934             /* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */
 935             cmd->xfer = buf[9] | (buf[8] << 8);
 936         }
 937         break;
 938     case ATA_PASSTHROUGH_12:
 939         if (dev->type == TYPE_ROM) {
 940             /* BLANK command of MMC */
 941             cmd->xfer = 0;
 942         } else {
 943             cmd->xfer = ata_passthrough_12_xfer_size(dev, buf);
 944         }
 945         break;
 946     case ATA_PASSTHROUGH_16:
 947         cmd->xfer = ata_passthrough_16_xfer_size(dev, buf);
 948         break;
 949     }
 950     return 0;
 951 }
 952
 953 static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
 954 {
 955     switch (buf[0]) {
 956     /* stream commands */
 957     case ERASE_12:
 958     case ERASE_16:
 959         cmd->xfer = 0;
 960         break;
 961     case READ_6:
 962     case READ_REVERSE:
 963     case RECOVER_BUFFERED_DATA:
 964     case WRITE_6:
 965         cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16);
 966         if (buf[1] & 0x01) { /* fixed */
 967             cmd->xfer *= dev->blocksize;
 968         }
 969         break;
 970     case READ_16:
 971     case READ_REVERSE_16:
 972     case VERIFY_16:
 973     case WRITE_16:
 974         cmd->xfer = buf[14] | (buf[13] << 8) | (buf[12] << 16);
 975         if (buf[1] & 0x01) { /* fixed */
 976             cmd->xfer *= dev->blocksize;
 977         }
 978         break;
 979     case REWIND:
 980     case LOAD_UNLOAD:
 981         cmd->xfer = 0;
 982         break;
 983     case SPACE_16:
 984         cmd->xfer = buf[13] | (buf[12] << 8);
 985         break;
 986     case READ_POSITION:
 987         switch (buf[1] & 0x1f) /* operation code */ {
 988         case SHORT_FORM_BLOCK_ID:
 989         case SHORT_FORM_VENDOR_SPECIFIC:
 990             cmd->xfer = 20;
 991             break;
 992         case LONG_FORM:
 993             cmd->xfer = 32;
 994             break;
 995         case EXTENDED_FORM:
 996             cmd->xfer = buf[8] | (buf[7] << 8);
 997             break;
 998         default:
 999             return -1;
1000         }
1001
1002         break;
1003     case FORMAT_UNIT:
1004         cmd->xfer = buf[4] | (buf[3] << 8);
1005         break;
1006     /* generic commands */
1007     default:
1008         return scsi_req_length(cmd, dev, buf);
1009     }
1010     return 0;
1011 }
1012
1013 static int scsi_req_medium_changer_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
1014 {
1015     switch (buf[0]) {
1016     /* medium changer commands */
1017     case EXCHANGE_MEDIUM:
1018     case INITIALIZE_ELEMENT_STATUS:
1019     case INITIALIZE_ELEMENT_STATUS_WITH_RANGE:
1020     case MOVE_MEDIUM:
1021     case POSITION_TO_ELEMENT:
1022         cmd->xfer = 0;
1023         break;
1024     case READ_ELEMENT_STATUS:
1025         cmd->xfer = buf[9] | (buf[8] << 8) | (buf[7] << 16);
1026         break;
1027
1028     /* generic commands */
1029     default:
1030         return scsi_req_length(cmd, dev, buf);
1031     }
1032     return 0;
1033 }
1034
1035
1036 static void scsi_cmd_xfer_mode(SCSICommand *cmd)
1037 {
1038     if (!cmd->xfer) {
1039         cmd->mode = SCSI_XFER_NONE;
1040         return;
1041     }
1042     switch (cmd->buf[0]) {
1043     case WRITE_6:
1044     case WRITE_10:
1045     case WRITE_VERIFY_10:
1046     case WRITE_12:
1047     case WRITE_VERIFY_12:
1048     case WRITE_16:
1049     case WRITE_VERIFY_16:
1050     case COPY:
1051     case COPY_VERIFY:
1052     case COMPARE:
1053     case CHANGE_DEFINITION:
1054     case LOG_SELECT:
1055     case MODE_SELECT:
1056     case MODE_SELECT_10:
1057     case SEND_DIAGNOSTIC:
1058     case WRITE_BUFFER:
1059     case FORMAT_UNIT:
1060     case REASSIGN_BLOCKS:
1061     case SEARCH_EQUAL:
1062     case SEARCH_HIGH:
1063     case SEARCH_LOW:
1064     case UPDATE_BLOCK:
1065     case WRITE_LONG_10:
1066     case WRITE_SAME_10:
1067     case WRITE_SAME_16:
1068     case UNMAP:
1069     case SEARCH_HIGH_12:
1070     case SEARCH_EQUAL_12:
1071     case SEARCH_LOW_12:
1072     case MEDIUM_SCAN:
1073     case SEND_VOLUME_TAG:
1074     case SEND_CUE_SHEET:
1075     case SEND_DVD_STRUCTURE:
1076     case PERSISTENT_RESERVE_OUT:
1077     case MAINTENANCE_OUT:
1078         cmd->mode = SCSI_XFER_TO_DEV;
1079         break;
1080     case ATA_PASSTHROUGH_12:
1081     case ATA_PASSTHROUGH_16:
1082         /* T_DIR */
1083         cmd->mode = (cmd->buf[2] & 0x8) ?
1084                    SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV;
1085         break;
1086     default:
1087         cmd->mode = SCSI_XFER_FROM_DEV;
1088         break;
1089     }
1090 }
1091
1092 static uint64_t scsi_cmd_lba(SCSICommand *cmd)
1093 {
1094     uint8_t *buf = cmd->buf;
1095     uint64_t lba;
1096
1097     switch (buf[0] >> 5) {
1098     case 0:
1099         lba = ldl_be_p(&buf[0]) & 0x1fffff;
1100         break;
1101     case 1:
1102     case 2:
1103     case 5:
1104         lba = ldl_be_p(&buf[2]) & 0xffffffffULL;
1105         break;
1106     case 4:
1107         lba = ldq_be_p(&buf[2]);
1108         break;
1109     default:
1110         lba = -1;
1111
1112     }
1113     return lba;
1114 }
1115
1116 int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
1117 {
1118     int rc;
1119
1120     switch (buf[0] >> 5) {
1121     case 0:
1122         cmd->len = 6;
1123         break;
1124     case 1:
1125     case 2:
1126         cmd->len = 10;
1127         break;
1128     case 4:
1129         cmd->len = 16;
1130         break;
1131     case 5:
1132         cmd->len = 12;
1133         break;
1134     default:
1135         return -1;
1136     }
1137
1138     switch (dev->type) {
1139     case TYPE_TAPE:
1140         rc = scsi_req_stream_length(cmd, dev, buf);
1141         break;
1142     case TYPE_MEDIUM_CHANGER:
1143         rc = scsi_req_medium_changer_length(cmd, dev, buf);
1144         break;
1145     default:
1146         rc = scsi_req_length(cmd, dev, buf);
1147         break;
1148     }
1149
1150     if (rc != 0)
1151         return rc;
1152
1153     memcpy(cmd->buf, buf, cmd->len);
1154     scsi_cmd_xfer_mode(cmd);
1155     cmd->lba = scsi_cmd_lba(cmd);
1156     return 0;
1157 }
1158
1159 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense)
1160 {
1161     SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
1162
1163     scsi_device_set_ua(dev, sense);
1164     if (bus->info->change) {
1165         bus->info->change(bus, dev, sense);
1166     }
1167 }
1168
1169 /*
1170  * Predefined sense codes
1171  */
1172
1173 /* No sense data available */
1174 const struct SCSISense sense_code_NO_SENSE = {
1175     .key = NO_SENSE , .asc = 0x00 , .ascq = 0x00
1176 };
1177
1178 /* LUN not ready, Manual intervention required */
1179 const struct SCSISense sense_code_LUN_NOT_READY = {
1180     .key = NOT_READY, .asc = 0x04, .ascq = 0x03
1181 };
1182
1183 /* LUN not ready, Medium not present */
1184 const struct SCSISense sense_code_NO_MEDIUM = {
1185     .key = NOT_READY, .asc = 0x3a, .ascq = 0x00
1186 };
1187
1188 /* LUN not ready, medium removal prevented */
1189 const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = {
1190     .key = NOT_READY, .asc = 0x53, .ascq = 0x02
1191 };
1192
1193 /* Hardware error, internal target failure */
1194 const struct SCSISense sense_code_TARGET_FAILURE = {
1195     .key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00
1196 };
1197
1198 /* Illegal request, invalid command operation code */
1199 const struct SCSISense sense_code_INVALID_OPCODE = {
1200     .key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00
1201 };
1202
1203 /* Illegal request, LBA out of range */
1204 const struct SCSISense sense_code_LBA_OUT_OF_RANGE = {
1205     .key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00
1206 };
1207
1208 /* Illegal request, Invalid field in CDB */
1209 const struct SCSISense sense_code_INVALID_FIELD = {
1210     .key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00
1211 };
1212
1213 /* Illegal request, Invalid field in parameter list */
1214 const struct SCSISense sense_code_INVALID_PARAM = {
1215     .key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x00
1216 };
1217
1218 /* Illegal request, Parameter list length error */
1219 const struct SCSISense sense_code_INVALID_PARAM_LEN = {
1220     .key = ILLEGAL_REQUEST, .asc = 0x1a, .ascq = 0x00
1221 };
1222
1223 /* Illegal request, LUN not supported */
1224 const struct SCSISense sense_code_LUN_NOT_SUPPORTED = {
1225     .key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00
1226 };
1227
1228 /* Illegal request, Saving parameters not supported */
1229 const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = {
1230     .key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00
1231 };
1232
1233 /* Illegal request, Incompatible medium installed */
1234 const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = {
1235     .key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00
1236 };
1237
1238 /* Illegal request, medium removal prevented */
1239 const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = {
1240     .key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x02
1241 };
1242
1243 /* Command aborted, I/O process terminated */
1244 const struct SCSISense sense_code_IO_ERROR = {
1245     .key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06
1246 };
1247
1248 /* Command aborted, I_T Nexus loss occurred */
1249 const struct SCSISense sense_code_I_T_NEXUS_LOSS = {
1250     .key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07
1251 };
1252
1253 /* Command aborted, Logical Unit failure */
1254 const struct SCSISense sense_code_LUN_FAILURE = {
1255     .key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01
1256 };
1257
1258 /* Unit attention, Capacity data has changed */
1259 const struct SCSISense sense_code_CAPACITY_CHANGED = {
1260     .key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09
1261 };
1262
1263 /* Unit attention, Power on, reset or bus device reset occurred */
1264 const struct SCSISense sense_code_RESET = {
1265     .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00
1266 };
1267
1268 /* Unit attention, No medium */
1269 const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = {
1270     .key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00
1271 };
1272
1273 /* Unit attention, Medium may have changed */
1274 const struct SCSISense sense_code_MEDIUM_CHANGED = {
1275     .key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00
1276 };
1277
1278 /* Unit attention, Reported LUNs data has changed */
1279 const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = {
1280     .key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e
1281 };
1282
1283 /* Unit attention, Device internal reset */
1284 const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = {
1285     .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04
1286 };
1287
1288 /* Data Protection, Write Protected */
1289 const struct SCSISense sense_code_WRITE_PROTECTED = {
1290     .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00
1291 };
1292
1293 /*
1294  * scsi_build_sense
1295  *
1296  * Convert between fixed and descriptor sense buffers
1297  */
1298 int scsi_build_sense(uint8_t *in_buf, int in_len,
1299                      uint8_t *buf, int len, bool fixed)
1300 {
1301     bool fixed_in;
1302     SCSISense sense;
1303     if (!fixed && len < 8) {
1304         return 0;
1305     }
1306
1307     if (in_len == 0) {
1308         sense.key = NO_SENSE;
1309         sense.asc = 0;
1310         sense.ascq = 0;
1311     } else {
1312         fixed_in = (in_buf[0] & 2) == 0;
1313
1314         if (fixed == fixed_in) {
1315             memcpy(buf, in_buf, MIN(len, in_len));
1316             return MIN(len, in_len);
1317         }
1318
1319         if (fixed_in) {
1320             sense.key = in_buf[2];
1321             sense.asc = in_buf[12];
1322             sense.ascq = in_buf[13];
1323         } else {
1324             sense.key = in_buf[1];
1325             sense.asc = in_buf[2];
1326             sense.ascq = in_buf[3];
1327         }
1328     }
1329
1330     memset(buf, 0, len);
1331     if (fixed) {
1332         /* Return fixed format sense buffer */
1333         buf[0] = 0x70;
1334         buf[2] = sense.key;
1335         buf[7] = 10;
1336         buf[12] = sense.asc;
1337         buf[13] = sense.ascq;
1338         return MIN(len, 18);
1339     } else {
1340         /* Return descriptor format sense buffer */
1341         buf[0] = 0x72;
1342         buf[1] = sense.key;
1343         buf[2] = sense.asc;
1344         buf[3] = sense.ascq;
1345         return 8;
1346     }
1347 }
1348
1349 static const char *scsi_command_name(uint8_t cmd)
1350 {
1351     static const char *names[] = {
1352         [ TEST_UNIT_READY          ] = "TEST_UNIT_READY",
1353         [ REWIND                   ] = "REWIND",
1354         [ REQUEST_SENSE            ] = "REQUEST_SENSE",
1355         [ FORMAT_UNIT              ] = "FORMAT_UNIT",
1356         [ READ_BLOCK_LIMITS        ] = "READ_BLOCK_LIMITS",
1357         [ REASSIGN_BLOCKS          ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS",
1358         /* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */
1359         [ READ_6                   ] = "READ_6",
1360         [ WRITE_6                  ] = "WRITE_6",
1361         [ SET_CAPACITY             ] = "SET_CAPACITY",
1362         [ READ_REVERSE             ] = "READ_REVERSE",
1363         [ WRITE_FILEMARKS          ] = "WRITE_FILEMARKS",
1364         [ SPACE                    ] = "SPACE",
1365         [ INQUIRY                  ] = "INQUIRY",
1366         [ RECOVER_BUFFERED_DATA    ] = "RECOVER_BUFFERED_DATA",
1367         [ MAINTENANCE_IN           ] = "MAINTENANCE_IN",
1368         [ MAINTENANCE_OUT          ] = "MAINTENANCE_OUT",
1369         [ MODE_SELECT              ] = "MODE_SELECT",
1370         [ RESERVE                  ] = "RESERVE",
1371         [ RELEASE                  ] = "RELEASE",
1372         [ COPY                     ] = "COPY",
1373         [ ERASE                    ] = "ERASE",
1374         [ MODE_SENSE               ] = "MODE_SENSE",
1375         [ START_STOP               ] = "START_STOP/LOAD_UNLOAD",
1376         /* LOAD_UNLOAD and START_STOP use the same operation code */
1377         [ RECEIVE_DIAGNOSTIC       ] = "RECEIVE_DIAGNOSTIC",
1378         [ SEND_DIAGNOSTIC          ] = "SEND_DIAGNOSTIC",
1379         [ ALLOW_MEDIUM_REMOVAL     ] = "ALLOW_MEDIUM_REMOVAL",
1380         [ READ_CAPACITY_10         ] = "READ_CAPACITY_10",
1381         [ READ_10                  ] = "READ_10",
1382         [ WRITE_10                 ] = "WRITE_10",
1383         [ SEEK_10                  ] = "SEEK_10/POSITION_TO_ELEMENT",
1384         /* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */
1385         [ WRITE_VERIFY_10          ] = "WRITE_VERIFY_10",
1386         [ VERIFY_10                ] = "VERIFY_10",
1387         [ SEARCH_HIGH              ] = "SEARCH_HIGH",
1388         [ SEARCH_EQUAL             ] = "SEARCH_EQUAL",
1389         [ SEARCH_LOW               ] = "SEARCH_LOW",
1390         [ SET_LIMITS               ] = "SET_LIMITS",
1391         [ PRE_FETCH                ] = "PRE_FETCH/READ_POSITION",
1392         /* READ_POSITION and PRE_FETCH use the same operation code */
1393         [ SYNCHRONIZE_CACHE        ] = "SYNCHRONIZE_CACHE",
1394         [ LOCK_UNLOCK_CACHE        ] = "LOCK_UNLOCK_CACHE",
1395         [ READ_DEFECT_DATA         ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE",
1396         /* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */
1397         [ MEDIUM_SCAN              ] = "MEDIUM_SCAN",
1398         [ COMPARE                  ] = "COMPARE",
1399         [ COPY_VERIFY              ] = "COPY_VERIFY",
1400         [ WRITE_BUFFER             ] = "WRITE_BUFFER",
1401         [ READ_BUFFER              ] = "READ_BUFFER",
1402         [ UPDATE_BLOCK             ] = "UPDATE_BLOCK",
1403         [ READ_LONG_10             ] = "READ_LONG_10",
1404         [ WRITE_LONG_10            ] = "WRITE_LONG_10",
1405         [ CHANGE_DEFINITION        ] = "CHANGE_DEFINITION",
1406         [ WRITE_SAME_10            ] = "WRITE_SAME_10",
1407         [ UNMAP                    ] = "UNMAP",
1408         [ READ_TOC                 ] = "READ_TOC",
1409         [ REPORT_DENSITY_SUPPORT   ] = "REPORT_DENSITY_SUPPORT",
1410         [ SANITIZE                 ] = "SANITIZE",
1411         [ GET_CONFIGURATION        ] = "GET_CONFIGURATION",
1412         [ LOG_SELECT               ] = "LOG_SELECT",
1413         [ LOG_SENSE                ] = "LOG_SENSE",
1414         [ MODE_SELECT_10           ] = "MODE_SELECT_10",
1415         [ RESERVE_10               ] = "RESERVE_10",
1416         [ RELEASE_10               ] = "RELEASE_10",
1417         [ MODE_SENSE_10            ] = "MODE_SENSE_10",
1418         [ PERSISTENT_RESERVE_IN    ] = "PERSISTENT_RESERVE_IN",
1419         [ PERSISTENT_RESERVE_OUT   ] = "PERSISTENT_RESERVE_OUT",
1420         [ WRITE_FILEMARKS_16       ] = "WRITE_FILEMARKS_16",
1421         [ EXTENDED_COPY            ] = "EXTENDED_COPY",
1422         [ ATA_PASSTHROUGH_16       ] = "ATA_PASSTHROUGH_16",
1423         [ ACCESS_CONTROL_IN        ] = "ACCESS_CONTROL_IN",
1424         [ ACCESS_CONTROL_OUT       ] = "ACCESS_CONTROL_OUT",
1425         [ READ_16                  ] = "READ_16",
1426         [ COMPARE_AND_WRITE        ] = "COMPARE_AND_WRITE",
1427         [ WRITE_16                 ] = "WRITE_16",
1428         [ WRITE_VERIFY_16          ] = "WRITE_VERIFY_16",
1429         [ VERIFY_16                ] = "VERIFY_16",
1430         [ PRE_FETCH_16             ] = "PRE_FETCH_16",
1431         [ SYNCHRONIZE_CACHE_16     ] = "SPACE_16/SYNCHRONIZE_CACHE_16",
1432         /* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */
1433         [ LOCATE_16                ] = "LOCATE_16",
1434         [ WRITE_SAME_16            ] = "ERASE_16/WRITE_SAME_16",
1435         /* ERASE_16 and WRITE_SAME_16 use the same operation code */
1436         [ SERVICE_ACTION_IN_16     ] = "SERVICE_ACTION_IN_16",
1437         [ WRITE_LONG_16            ] = "WRITE_LONG_16",
1438         [ REPORT_LUNS              ] = "REPORT_LUNS",
1439         [ ATA_PASSTHROUGH_12       ] = "BLANK/ATA_PASSTHROUGH_12",
1440         [ MOVE_MEDIUM              ] = "MOVE_MEDIUM",
1441         [ EXCHANGE_MEDIUM          ] = "EXCHANGE MEDIUM",
1442         [ READ_12                  ] = "READ_12",
1443         [ WRITE_12                 ] = "WRITE_12",
1444         [ ERASE_12                 ] = "ERASE_12/GET_PERFORMANCE",
1445         /* ERASE_12 and GET_PERFORMANCE use the same operation code */
1446         [ SERVICE_ACTION_IN_12     ] = "SERVICE_ACTION_IN_12",
1447         [ WRITE_VERIFY_12          ] = "WRITE_VERIFY_12",
1448         [ VERIFY_12                ] = "VERIFY_12",
1449         [ SEARCH_HIGH_12           ] = "SEARCH_HIGH_12",
1450         [ SEARCH_EQUAL_12          ] = "SEARCH_EQUAL_12",
1451         [ SEARCH_LOW_12            ] = "SEARCH_LOW_12",
1452         [ READ_ELEMENT_STATUS      ] = "READ_ELEMENT_STATUS",
1453         [ SEND_VOLUME_TAG          ] = "SEND_VOLUME_TAG/SET_STREAMING",
1454         /* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */
1455         [ READ_CD                  ] = "READ_CD",
1456         [ READ_DEFECT_DATA_12      ] = "READ_DEFECT_DATA_12",
1457         [ READ_DVD_STRUCTURE       ] = "READ_DVD_STRUCTURE",
1458         [ RESERVE_TRACK            ] = "RESERVE_TRACK",
1459         [ SEND_CUE_SHEET           ] = "SEND_CUE_SHEET",
1460         [ SEND_DVD_STRUCTURE       ] = "SEND_DVD_STRUCTURE",
1461         [ SET_CD_SPEED             ] = "SET_CD_SPEED",
1462         [ SET_READ_AHEAD           ] = "SET_READ_AHEAD",
1463         [ ALLOW_OVERWRITE          ] = "ALLOW_OVERWRITE",
1464         [ MECHANISM_STATUS         ] = "MECHANISM_STATUS",
1465     };
1466
1467     if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL)
1468         return "*UNKNOWN*";
1469     return names[cmd];
1470 }
1471
1472 SCSIRequest *scsi_req_ref(SCSIRequest *req)
1473 {
1474     assert(req->refcount > 0);
1475     req->refcount++;
1476     return req;
1477 }
1478
1479 void scsi_req_unref(SCSIRequest *req)
1480 {
1481     assert(req->refcount > 0);
1482     if (--req->refcount == 0) {
1483         SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, req->dev->qdev.parent_bus);
1484         if (bus->info->free_request && req->hba_private) {
1485             bus->info->free_request(bus, req->hba_private);
1486         }
1487         if (req->ops->free_req) {
1488             req->ops->free_req(req);
1489         }
1490         g_free(req);
1491     }
1492 }
1493
1494 /* Tell the device that we finished processing this chunk of I/O.  It
1495    will start the next chunk or complete the command.  */
1496 void scsi_req_continue(SCSIRequest *req)
1497 {
1498     trace_scsi_req_continue(req->dev->id, req->lun, req->tag);
1499     if (req->cmd.mode == SCSI_XFER_TO_DEV) {
1500         req->ops->write_data(req);
1501     } else {
1502         req->ops->read_data(req);
1503     }
1504 }
1505
1506 /* Called by the devices when data is ready for the HBA.  The HBA should
1507    start a DMA operation to read or fill the device's data buffer.
1508    Once it completes, calling scsi_req_continue will restart I/O.  */
1509 void scsi_req_data(SCSIRequest *req, int len)
1510 {
1511     uint8_t *buf;
1512     if (req->io_canceled) {
1513         trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len);
1514         return;
1515     }
1516     trace_scsi_req_data(req->dev->id, req->lun, req->tag, len);
1517     assert(req->cmd.mode != SCSI_XFER_NONE);
1518     if (!req->sg) {
1519         req->resid -= len;
1520         req->bus->info->transfer_data(req, len);
1521         return;
1522     }
1523
1524     /* If the device calls scsi_req_data and the HBA specified a
1525      * scatter/gather list, the transfer has to happen in a single
1526      * step.  */
1527     assert(!req->dma_started);
1528     req->dma_started = true;
1529
1530     buf = scsi_req_get_buf(req);
1531     if (req->cmd.mode == SCSI_XFER_FROM_DEV) {
1532         req->resid = dma_buf_read(buf, len, req->sg);
1533     } else {
1534         req->resid = dma_buf_write(buf, len, req->sg);
1535     }
1536     scsi_req_continue(req);
1537 }
1538
1539 void scsi_req_print(SCSIRequest *req)
1540 {
1541     FILE *fp = stderr;
1542     int i;
1543
1544     fprintf(fp, "[%s id=%d] %s",
1545             req->dev->qdev.parent_bus->name,
1546             req->dev->id,
1547             scsi_command_name(req->cmd.buf[0]));
1548     for (i = 1; i < req->cmd.len; i++) {
1549         fprintf(fp, " 0x%02x", req->cmd.buf[i]);
1550     }
1551     switch (req->cmd.mode) {
1552     case SCSI_XFER_NONE:
1553         fprintf(fp, " - none\n");
1554         break;
1555     case SCSI_XFER_FROM_DEV:
1556         fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer);
1557         break;
1558     case SCSI_XFER_TO_DEV:
1559         fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer);
1560         break;
1561     default:
1562         fprintf(fp, " - Oops\n");
1563         break;
1564     }
1565 }
1566
1567 void scsi_req_complete(SCSIRequest *req, int status)
1568 {
1569     assert(req->status == -1);
1570     req->status = status;
1571
1572     assert(req->sense_len <= sizeof(req->sense));
1573     if (status == GOOD) {
1574         req->sense_len = 0;
1575     }
1576
1577     if (req->sense_len) {
1578         memcpy(req->dev->sense, req->sense, req->sense_len);
1579         req->dev->sense_len = req->sense_len;
1580         req->dev->sense_is_ua = (req->ops == &reqops_unit_attention);
1581     } else {
1582         req->dev->sense_len = 0;
1583         req->dev->sense_is_ua = false;
1584     }
1585
1586     /*
1587      * Unit attention state is now stored in the device's sense buffer
1588      * if the HBA didn't do autosense.  Clear the pending unit attention
1589      * flags.
1590      */
1591     scsi_clear_unit_attention(req);
1592
1593     scsi_req_ref(req);
1594     scsi_req_dequeue(req);
1595     req->bus->info->complete(req, req->status, req->resid);
1596     scsi_req_unref(req);
1597 }
1598
1599 void scsi_req_cancel(SCSIRequest *req)
1600 {
1601     trace_scsi_req_cancel(req->dev->id, req->lun, req->tag);
1602     if (!req->enqueued) {
1603         return;
1604     }
1605     scsi_req_ref(req);
1606     scsi_req_dequeue(req);
1607     req->io_canceled = true;
1608     if (req->ops->cancel_io) {
1609         req->ops->cancel_io(req);
1610     }
1611     if (req->bus->info->cancel) {
1612         req->bus->info->cancel(req);
1613     }
1614     scsi_req_unref(req);
1615 }
1616
1617 void scsi_req_abort(SCSIRequest *req, int status)
1618 {
1619     if (!req->enqueued) {
1620         return;
1621     }
1622     scsi_req_ref(req);
1623     scsi_req_dequeue(req);
1624     req->io_canceled = true;
1625     if (req->ops->cancel_io) {
1626         req->ops->cancel_io(req);
1627     }
1628     scsi_req_complete(req, status);
1629     scsi_req_unref(req);
1630 }
1631
1632 static int scsi_ua_precedence(SCSISense sense)
1633 {
1634     if (sense.key != UNIT_ATTENTION) {
1635         return INT_MAX;
1636     }
1637     if (sense.asc == 0x29 && sense.ascq == 0x04) {
1638         /* DEVICE INTERNAL RESET goes with POWER ON OCCURRED */
1639         return 1;
1640     } else if (sense.asc == 0x3F && sense.ascq == 0x01) {
1641         /* MICROCODE HAS BEEN CHANGED goes with SCSI BUS RESET OCCURRED */
1642         return 2;
1643     } else if (sense.asc == 0x29 && (sense.ascq == 0x05 || sense.ascq == 0x06)) {
1644         /* These two go with "all others". */
1645         ;
1646     } else if (sense.asc == 0x29 && sense.ascq <= 0x07) {
1647         /* POWER ON, RESET OR BUS DEVICE RESET OCCURRED = 0
1648          * POWER ON OCCURRED = 1
1649          * SCSI BUS RESET OCCURRED = 2
1650          * BUS DEVICE RESET FUNCTION OCCURRED = 3
1651          * I_T NEXUS LOSS OCCURRED = 7
1652          */
1653         return sense.ascq;
1654     } else if (sense.asc == 0x2F && sense.ascq == 0x01) {
1655         /* COMMANDS CLEARED BY POWER LOSS NOTIFICATION  */
1656         return 8;
1657     }
1658     return (sense.asc << 8) | sense.ascq;
1659 }
1660
1661 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense)
1662 {
1663     int prec1, prec2;
1664     if (sense.key != UNIT_ATTENTION) {
1665         return;
1666     }
1667     trace_scsi_device_set_ua(sdev->id, sdev->lun, sense.key,
1668                              sense.asc, sense.ascq);
1669
1670     /*
1671      * Override a pre-existing unit attention condition, except for a more
1672      * important reset condition.
1673     */
1674     prec1 = scsi_ua_precedence(sdev->unit_attention);
1675     prec2 = scsi_ua_precedence(sense);
1676     if (prec2 < prec1) {
1677         sdev->unit_attention = sense;
1678     }
1679 }
1680
1681 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense)
1682 {
1683     SCSIRequest *req;
1684
1685     while (!QTAILQ_EMPTY(&sdev->requests)) {
1686         req = QTAILQ_FIRST(&sdev->requests);
1687         scsi_req_cancel(req);
1688     }
1689
1690     scsi_device_set_ua(sdev, sense);
1691 }
1692
1693 static char *scsibus_get_dev_path(DeviceState *dev)
1694 {
1695     SCSIDevice *d = DO_UPCAST(SCSIDevice, qdev, dev);
1696     DeviceState *hba = dev->parent_bus->parent;
1697     char *id;
1698     char *path;
1699
1700     id = qdev_get_dev_path(hba);
1701     if (id) {
1702         path = g_strdup_printf("%s/%d:%d:%d", id, d->channel, d->id, d->lun);
1703     } else {
1704         path = g_strdup_printf("%d:%d:%d", d->channel, d->id, d->lun);
1705     }
1706     g_free(id);
1707     return path;
1708 }
1709
1710 static char *scsibus_get_fw_dev_path(DeviceState *dev)
1711 {
1712     SCSIDevice *d = SCSI_DEVICE(dev);
1713     char path[100];
1714
1715     snprintf(path, sizeof(path), "channel@%x/%s@%x,%x", d->channel,
1716              qdev_fw_name(dev), d->id, d->lun);
1717
1718     return strdup(path);
1719 }
1720
1721 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun)
1722 {
1723     BusChild *kid;
1724     SCSIDevice *target_dev = NULL;
1725
1726     QTAILQ_FOREACH_REVERSE(kid, &bus->qbus.children, ChildrenHead, sibling) {
1727         DeviceState *qdev = kid->child;
1728         SCSIDevice *dev = SCSI_DEVICE(qdev);
1729
1730         if (dev->channel == channel && dev->id == id) {
1731             if (dev->lun == lun) {
1732                 return dev;
1733             }
1734             target_dev = dev;
1735         }
1736     }
1737     return target_dev;
1738 }
1739
1740 /* SCSI request list.  For simplicity, pv points to the whole device */
1741
1742 static void put_scsi_requests(QEMUFile *f, void *pv, size_t size)
1743 {
1744     SCSIDevice *s = pv;
1745     SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus);
1746     SCSIRequest *req;
1747
1748     QTAILQ_FOREACH(req, &s->requests, next) {
1749         assert(!req->io_canceled);
1750         assert(req->status == -1);
1751         assert(req->enqueued);
1752
1753         qemu_put_sbyte(f, req->retry ? 1 : 2);
1754         qemu_put_buffer(f, req->cmd.buf, sizeof(req->cmd.buf));
1755         qemu_put_be32s(f, &req->tag);
1756         qemu_put_be32s(f, &req->lun);
1757         if (bus->info->save_request) {
1758             bus->info->save_request(f, req);
1759         }
1760         if (req->ops->save_request) {
1761             req->ops->save_request(f, req);
1762         }
1763     }
1764     qemu_put_sbyte(f, 0);
1765 }
1766
1767 static int get_scsi_requests(QEMUFile *f, void *pv, size_t size)
1768 {
1769     SCSIDevice *s = pv;
1770     SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus);
1771     int8_t sbyte;
1772
1773     while ((sbyte = qemu_get_sbyte(f)) > 0) {
1774         uint8_t buf[SCSI_CMD_BUF_SIZE];
1775         uint32_t tag;
1776         uint32_t lun;
1777         SCSIRequest *req;
1778
1779         qemu_get_buffer(f, buf, sizeof(buf));
1780         qemu_get_be32s(f, &tag);
1781         qemu_get_be32s(f, &lun);
1782         req = scsi_req_new(s, tag, lun, buf, NULL);
1783         req->retry = (sbyte == 1);
1784         if (bus->info->load_request) {
1785             req->hba_private = bus->info->load_request(f, req);
1786         }
1787         if (req->ops->load_request) {
1788             req->ops->load_request(f, req);
1789         }
1790
1791         /* Just restart it later.  */
1792         scsi_req_enqueue_internal(req);
1793
1794         /* At this point, the request will be kept alive by the reference
1795          * added by scsi_req_enqueue_internal, so we can release our reference.
1796          * The HBA of course will add its own reference in the load_request
1797          * callback if it needs to hold on the SCSIRequest.
1798          */
1799         scsi_req_unref(req);
1800     }
1801
1802     return 0;
1803 }
1804
1805 static int scsi_qdev_unplug(DeviceState *qdev)
1806 {
1807     SCSIDevice *dev = SCSI_DEVICE(qdev);
1808     SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
1809
1810     if (bus->info->hot_unplug) {
1811         bus->info->hot_unplug(bus, dev);
1812     }
1813     return qdev_simple_unplug_cb(qdev);
1814 }
1815
1816 static const VMStateInfo vmstate_info_scsi_requests = {
1817     .name = "scsi-requests",
1818     .get  = get_scsi_requests,
1819     .put  = put_scsi_requests,
1820 };
1821
1822 const VMStateDescription vmstate_scsi_device = {
1823     .name = "SCSIDevice",
1824     .version_id = 1,
1825     .minimum_version_id = 1,
1826     .minimum_version_id_old = 1,
1827     .fields = (VMStateField[]) {
1828         VMSTATE_UINT8(unit_attention.key, SCSIDevice),
1829         VMSTATE_UINT8(unit_attention.asc, SCSIDevice),
1830         VMSTATE_UINT8(unit_attention.ascq, SCSIDevice),
1831         VMSTATE_BOOL(sense_is_ua, SCSIDevice),
1832         VMSTATE_UINT8_ARRAY(sense, SCSIDevice, SCSI_SENSE_BUF_SIZE),
1833         VMSTATE_UINT32(sense_len, SCSIDevice),
1834         {
1835             .name         = "requests",
1836             .version_id   = 0,
1837             .field_exists = NULL,
1838             .size         = 0,   /* ouch */
1839             .info         = &vmstate_info_scsi_requests,
1840             .flags        = VMS_SINGLE,
1841             .offset       = 0,
1842         },
1843         VMSTATE_END_OF_LIST()
1844     }
1845 };
1846
1847 static void scsi_device_class_init(ObjectClass *klass, void *data)
1848 {
1849     DeviceClass *k = DEVICE_CLASS(klass);
1850     k->bus_type = TYPE_SCSI_BUS;
1851     k->init     = scsi_qdev_init;
1852     k->unplug   = scsi_qdev_unplug;
1853     k->exit     = scsi_qdev_exit;
1854     k->props    = scsi_props;
1855 }
1856
1857 static TypeInfo scsi_device_type_info = {
1858     .name = TYPE_SCSI_DEVICE,
1859     .parent = TYPE_DEVICE,
1860     .instance_size = sizeof(SCSIDevice),
1861     .abstract = true,
1862     .class_size = sizeof(SCSIDeviceClass),
1863     .class_init = scsi_device_class_init,
1864 };
1865
1866 static void scsi_register_types(void)
1867 {
1868     type_register_static(&scsi_bus_info);
1869     type_register_static(&scsi_device_type_info);
1870 }
1871
1872 type_init(scsi_register_types)