1 #include "hw/hw.h" 2 #include "qemu/error-report.h" 3 #include "hw/scsi/scsi.h" 4 #include "block/scsi.h" 5 #include "hw/qdev.h" 6 #include "sysemu/blockdev.h" 7 #include "trace.h" 8 #include "sysemu/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 static uint8_t *scsi_target_alloc_buf(SCSIRequest *req, size_t len); 15 static void scsi_target_free_buf(SCSIRequest *req); 16 17 static Property scsi_props[] = { 18 DEFINE_PROP_UINT32("channel", SCSIDevice, channel, 0), 19 DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1), 20 DEFINE_PROP_UINT32("lun", SCSIDevice, lun, -1), 21 DEFINE_PROP_END_OF_LIST(), 22 }; 23 24 static void scsi_bus_class_init(ObjectClass *klass, void *data) 25 { 26 BusClass *k = BUS_CLASS(klass); 27 28 k->get_dev_path = scsibus_get_dev_path; 29 k->get_fw_dev_path = scsibus_get_fw_dev_path; 30 } 31 32 static const TypeInfo scsi_bus_info = { 33 .name = TYPE_SCSI_BUS, 34 .parent = TYPE_BUS, 35 .instance_size = sizeof(SCSIBus), 36 .class_init = scsi_bus_class_init, 37 }; 38 static int next_scsi_bus; 39 40 static int scsi_device_init(SCSIDevice *s) 41 { 42 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); 43 if (sc->init) { 44 return sc->init(s); 45 } 46 return 0; 47 } 48 49 static void scsi_device_destroy(SCSIDevice *s) 50 { 51 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); 52 if (sc->destroy) { 53 sc->destroy(s); 54 } 55 } 56 57 static SCSIRequest *scsi_device_alloc_req(SCSIDevice *s, uint32_t tag, uint32_t lun, 58 uint8_t *buf, void *hba_private) 59 { 60 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); 61 if (sc->alloc_req) { 62 return sc->alloc_req(s, tag, lun, buf, hba_private); 63 } 64 65 return NULL; 66 } 67 68 static void scsi_device_unit_attention_reported(SCSIDevice *s) 69 { 70 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); 71 if (sc->unit_attention_reported) { 72 sc->unit_attention_reported(s); 73 } 74 } 75 76 /* Create a scsi bus, and attach devices to it. */ 77 void scsi_bus_new(SCSIBus *bus, size_t bus_size, DeviceState *host, 78 const SCSIBusInfo *info, const char *bus_name) 79 { 80 qbus_create_inplace(bus, bus_size, TYPE_SCSI_BUS, host, bus_name); 81 bus->busnr = next_scsi_bus++; 82 bus->info = info; 83 bus->qbus.allow_hotplug = 1; 84 } 85 86 static void scsi_dma_restart_bh(void *opaque) 87 { 88 SCSIDevice *s = opaque; 89 SCSIRequest *req, *next; 90 91 qemu_bh_delete(s->bh); 92 s->bh = NULL; 93 94 QTAILQ_FOREACH_SAFE(req, &s->requests, next, next) { 95 scsi_req_ref(req); 96 if (req->retry) { 97 req->retry = false; 98 switch (req->cmd.mode) { 99 case SCSI_XFER_FROM_DEV: 100 case SCSI_XFER_TO_DEV: 101 scsi_req_continue(req); 102 break; 103 case SCSI_XFER_NONE: 104 assert(!req->sg); 105 scsi_req_dequeue(req); 106 scsi_req_enqueue(req); 107 break; 108 } 109 } 110 scsi_req_unref(req); 111 } 112 } 113 114 void scsi_req_retry(SCSIRequest *req) 115 { 116 /* No need to save a reference, because scsi_dma_restart_bh just 117 * looks at the request list. */ 118 req->retry = true; 119 } 120 121 static void scsi_dma_restart_cb(void *opaque, int running, RunState state) 122 { 123 SCSIDevice *s = opaque; 124 125 if (!running) { 126 return; 127 } 128 if (!s->bh) { 129 s->bh = qemu_bh_new(scsi_dma_restart_bh, s); 130 qemu_bh_schedule(s->bh); 131 } 132 } 133 134 static int scsi_qdev_init(DeviceState *qdev) 135 { 136 SCSIDevice *dev = SCSI_DEVICE(qdev); 137 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); 138 SCSIDevice *d; 139 int rc = -1; 140 141 if (dev->channel > bus->info->max_channel) { 142 error_report("bad scsi channel id: %d", dev->channel); 143 goto err; 144 } 145 if (dev->id != -1 && dev->id > bus->info->max_target) { 146 error_report("bad scsi device id: %d", dev->id); 147 goto err; 148 } 149 if (dev->lun != -1 && dev->lun > bus->info->max_lun) { 150 error_report("bad scsi device lun: %d", dev->lun); 151 goto err; 152 } 153 154 if (dev->id == -1) { 155 int id = -1; 156 if (dev->lun == -1) { 157 dev->lun = 0; 158 } 159 do { 160 d = scsi_device_find(bus, dev->channel, ++id, dev->lun); 161 } while (d && d->lun == dev->lun && id < bus->info->max_target); 162 if (d && d->lun == dev->lun) { 163 error_report("no free target"); 164 goto err; 165 } 166 dev->id = id; 167 } else if (dev->lun == -1) { 168 int lun = -1; 169 do { 170 d = scsi_device_find(bus, dev->channel, dev->id, ++lun); 171 } while (d && d->lun == lun && lun < bus->info->max_lun); 172 if (d && d->lun == lun) { 173 error_report("no free lun"); 174 goto err; 175 } 176 dev->lun = lun; 177 } else { 178 d = scsi_device_find(bus, dev->channel, dev->id, dev->lun); 179 assert(d); 180 if (d->lun == dev->lun && dev != d) { 181 object_unparent(OBJECT(d)); 182 } 183 } 184 185 QTAILQ_INIT(&dev->requests); 186 rc = scsi_device_init(dev); 187 if (rc == 0) { 188 dev->vmsentry = qemu_add_vm_change_state_handler(scsi_dma_restart_cb, 189 dev); 190 } 191 192 if (bus->info->hotplug) { 193 bus->info->hotplug(bus, dev); 194 } 195 196 err: 197 return rc; 198 } 199 200 static int scsi_qdev_exit(DeviceState *qdev) 201 { 202 SCSIDevice *dev = SCSI_DEVICE(qdev); 203 204 if (dev->vmsentry) { 205 qemu_del_vm_change_state_handler(dev->vmsentry); 206 } 207 scsi_device_destroy(dev); 208 return 0; 209 } 210 211 /* handle legacy '-drive if=scsi,...' cmd line args */ 212 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv, 213 int unit, bool removable, int bootindex, 214 const char *serial, Error **errp) 215 { 216 const char *driver; 217 DeviceState *dev; 218 Error *err = NULL; 219 220 driver = bdrv_is_sg(bdrv) ? "scsi-generic" : "scsi-disk"; 221 dev = qdev_create(&bus->qbus, driver); 222 qdev_prop_set_uint32(dev, "scsi-id", unit); 223 if (bootindex >= 0) { 224 qdev_prop_set_int32(dev, "bootindex", bootindex); 225 } 226 if (object_property_find(OBJECT(dev), "removable", NULL)) { 227 qdev_prop_set_bit(dev, "removable", removable); 228 } 229 if (serial && object_property_find(OBJECT(dev), "serial", NULL)) { 230 qdev_prop_set_string(dev, "serial", serial); 231 } 232 if (qdev_prop_set_drive(dev, "drive", bdrv) < 0) { 233 error_setg(errp, "Setting drive property failed"); 234 object_unparent(OBJECT(dev)); 235 return NULL; 236 } 237 object_property_set_bool(OBJECT(dev), true, "realized", &err); 238 if (err != NULL) { 239 error_propagate(errp, err); 240 object_unparent(OBJECT(dev)); 241 return NULL; 242 } 243 return SCSI_DEVICE(dev); 244 } 245 246 void scsi_bus_legacy_handle_cmdline(SCSIBus *bus, Error **errp) 247 { 248 Location loc; 249 DriveInfo *dinfo; 250 int unit; 251 Error *err = NULL; 252 253 loc_push_none(&loc); 254 for (unit = 0; unit <= bus->info->max_target; unit++) { 255 dinfo = drive_get(IF_SCSI, bus->busnr, unit); 256 if (dinfo == NULL) { 257 continue; 258 } 259 qemu_opts_loc_restore(dinfo->opts); 260 scsi_bus_legacy_add_drive(bus, dinfo->bdrv, unit, false, -1, NULL, 261 &err); 262 if (err != NULL) { 263 error_propagate(errp, err); 264 break; 265 } 266 } 267 loc_pop(&loc); 268 } 269 270 static int32_t scsi_invalid_field(SCSIRequest *req, uint8_t *buf) 271 { 272 scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD)); 273 scsi_req_complete(req, CHECK_CONDITION); 274 return 0; 275 } 276 277 static const struct SCSIReqOps reqops_invalid_field = { 278 .size = sizeof(SCSIRequest), 279 .send_command = scsi_invalid_field 280 }; 281 282 /* SCSIReqOps implementation for invalid commands. */ 283 284 static int32_t scsi_invalid_command(SCSIRequest *req, uint8_t *buf) 285 { 286 scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE)); 287 scsi_req_complete(req, CHECK_CONDITION); 288 return 0; 289 } 290 291 static const struct SCSIReqOps reqops_invalid_opcode = { 292 .size = sizeof(SCSIRequest), 293 .send_command = scsi_invalid_command 294 }; 295 296 /* SCSIReqOps implementation for unit attention conditions. */ 297 298 static int32_t scsi_unit_attention(SCSIRequest *req, uint8_t *buf) 299 { 300 if (req->dev->unit_attention.key == UNIT_ATTENTION) { 301 scsi_req_build_sense(req, req->dev->unit_attention); 302 } else if (req->bus->unit_attention.key == UNIT_ATTENTION) { 303 scsi_req_build_sense(req, req->bus->unit_attention); 304 } 305 scsi_req_complete(req, CHECK_CONDITION); 306 return 0; 307 } 308 309 static const struct SCSIReqOps reqops_unit_attention = { 310 .size = sizeof(SCSIRequest), 311 .send_command = scsi_unit_attention 312 }; 313 314 /* SCSIReqOps implementation for REPORT LUNS and for commands sent to 315 an invalid LUN. */ 316 317 typedef struct SCSITargetReq SCSITargetReq; 318 319 struct SCSITargetReq { 320 SCSIRequest req; 321 int len; 322 uint8_t *buf; 323 int buf_len; 324 }; 325 326 static void store_lun(uint8_t *outbuf, int lun) 327 { 328 if (lun < 256) { 329 outbuf[1] = lun; 330 return; 331 } 332 outbuf[1] = (lun & 255); 333 outbuf[0] = (lun >> 8) | 0x40; 334 } 335 336 static bool scsi_target_emulate_report_luns(SCSITargetReq *r) 337 { 338 BusChild *kid; 339 int i, len, n; 340 int channel, id; 341 bool found_lun0; 342 343 if (r->req.cmd.xfer < 16) { 344 return false; 345 } 346 if (r->req.cmd.buf[2] > 2) { 347 return false; 348 } 349 channel = r->req.dev->channel; 350 id = r->req.dev->id; 351 found_lun0 = false; 352 n = 0; 353 QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) { 354 DeviceState *qdev = kid->child; 355 SCSIDevice *dev = SCSI_DEVICE(qdev); 356 357 if (dev->channel == channel && dev->id == id) { 358 if (dev->lun == 0) { 359 found_lun0 = true; 360 } 361 n += 8; 362 } 363 } 364 if (!found_lun0) { 365 n += 8; 366 } 367 368 scsi_target_alloc_buf(&r->req, n + 8); 369 370 len = MIN(n + 8, r->req.cmd.xfer & ~7); 371 memset(r->buf, 0, len); 372 stl_be_p(&r->buf[0], n); 373 i = found_lun0 ? 8 : 16; 374 QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) { 375 DeviceState *qdev = kid->child; 376 SCSIDevice *dev = SCSI_DEVICE(qdev); 377 378 if (dev->channel == channel && dev->id == id) { 379 store_lun(&r->buf[i], dev->lun); 380 i += 8; 381 } 382 } 383 assert(i == n + 8); 384 r->len = len; 385 return true; 386 } 387 388 static bool scsi_target_emulate_inquiry(SCSITargetReq *r) 389 { 390 assert(r->req.dev->lun != r->req.lun); 391 392 scsi_target_alloc_buf(&r->req, SCSI_INQUIRY_LEN); 393 394 if (r->req.cmd.buf[1] & 0x2) { 395 /* Command support data - optional, not implemented */ 396 return false; 397 } 398 399 if (r->req.cmd.buf[1] & 0x1) { 400 /* Vital product data */ 401 uint8_t page_code = r->req.cmd.buf[2]; 402 r->buf[r->len++] = page_code ; /* this page */ 403 r->buf[r->len++] = 0x00; 404 405 switch (page_code) { 406 case 0x00: /* Supported page codes, mandatory */ 407 { 408 int pages; 409 pages = r->len++; 410 r->buf[r->len++] = 0x00; /* list of supported pages (this page) */ 411 r->buf[pages] = r->len - pages - 1; /* number of pages */ 412 break; 413 } 414 default: 415 return false; 416 } 417 /* done with EVPD */ 418 assert(r->len < r->buf_len); 419 r->len = MIN(r->req.cmd.xfer, r->len); 420 return true; 421 } 422 423 /* Standard INQUIRY data */ 424 if (r->req.cmd.buf[2] != 0) { 425 return false; 426 } 427 428 /* PAGE CODE == 0 */ 429 r->len = MIN(r->req.cmd.xfer, SCSI_INQUIRY_LEN); 430 memset(r->buf, 0, r->len); 431 if (r->req.lun != 0) { 432 r->buf[0] = TYPE_NO_LUN; 433 } else { 434 r->buf[0] = TYPE_NOT_PRESENT | TYPE_INACTIVE; 435 r->buf[2] = 5; /* Version */ 436 r->buf[3] = 2 | 0x10; /* HiSup, response data format */ 437 r->buf[4] = r->len - 5; /* Additional Length = (Len - 1) - 4 */ 438 r->buf[7] = 0x10 | (r->req.bus->info->tcq ? 0x02 : 0); /* Sync, TCQ. */ 439 memcpy(&r->buf[8], "QEMU ", 8); 440 memcpy(&r->buf[16], "QEMU TARGET ", 16); 441 pstrcpy((char *) &r->buf[32], 4, qemu_get_version()); 442 } 443 return true; 444 } 445 446 static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf) 447 { 448 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 449 450 switch (buf[0]) { 451 case REPORT_LUNS: 452 if (!scsi_target_emulate_report_luns(r)) { 453 goto illegal_request; 454 } 455 break; 456 case INQUIRY: 457 if (!scsi_target_emulate_inquiry(r)) { 458 goto illegal_request; 459 } 460 break; 461 case REQUEST_SENSE: 462 scsi_target_alloc_buf(&r->req, SCSI_SENSE_LEN); 463 r->len = scsi_device_get_sense(r->req.dev, r->buf, 464 MIN(req->cmd.xfer, r->buf_len), 465 (req->cmd.buf[1] & 1) == 0); 466 if (r->req.dev->sense_is_ua) { 467 scsi_device_unit_attention_reported(req->dev); 468 r->req.dev->sense_len = 0; 469 r->req.dev->sense_is_ua = false; 470 } 471 break; 472 case TEST_UNIT_READY: 473 break; 474 default: 475 scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED)); 476 scsi_req_complete(req, CHECK_CONDITION); 477 return 0; 478 illegal_request: 479 scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD)); 480 scsi_req_complete(req, CHECK_CONDITION); 481 return 0; 482 } 483 484 if (!r->len) { 485 scsi_req_complete(req, GOOD); 486 } 487 return r->len; 488 } 489 490 static void scsi_target_read_data(SCSIRequest *req) 491 { 492 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 493 uint32_t n; 494 495 n = r->len; 496 if (n > 0) { 497 r->len = 0; 498 scsi_req_data(&r->req, n); 499 } else { 500 scsi_req_complete(&r->req, GOOD); 501 } 502 } 503 504 static uint8_t *scsi_target_get_buf(SCSIRequest *req) 505 { 506 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 507 508 return r->buf; 509 } 510 511 static uint8_t *scsi_target_alloc_buf(SCSIRequest *req, size_t len) 512 { 513 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 514 515 r->buf = g_malloc(len); 516 r->buf_len = len; 517 518 return r->buf; 519 } 520 521 static void scsi_target_free_buf(SCSIRequest *req) 522 { 523 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 524 525 g_free(r->buf); 526 } 527 528 static const struct SCSIReqOps reqops_target_command = { 529 .size = sizeof(SCSITargetReq), 530 .send_command = scsi_target_send_command, 531 .read_data = scsi_target_read_data, 532 .get_buf = scsi_target_get_buf, 533 .free_req = scsi_target_free_buf, 534 }; 535 536 537 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d, 538 uint32_t tag, uint32_t lun, void *hba_private) 539 { 540 SCSIRequest *req; 541 SCSIBus *bus = scsi_bus_from_device(d); 542 BusState *qbus = BUS(bus); 543 544 req = g_malloc0(reqops->size); 545 req->refcount = 1; 546 req->bus = bus; 547 req->dev = d; 548 req->tag = tag; 549 req->lun = lun; 550 req->hba_private = hba_private; 551 req->status = -1; 552 req->sense_len = 0; 553 req->ops = reqops; 554 object_ref(OBJECT(d)); 555 object_ref(OBJECT(qbus->parent)); 556 trace_scsi_req_alloc(req->dev->id, req->lun, req->tag); 557 return req; 558 } 559 560 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun, 561 uint8_t *buf, void *hba_private) 562 { 563 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus); 564 SCSIRequest *req; 565 SCSICommand cmd; 566 567 if (scsi_req_parse(&cmd, d, buf) != 0) { 568 trace_scsi_req_parse_bad(d->id, lun, tag, buf[0]); 569 req = scsi_req_alloc(&reqops_invalid_opcode, d, tag, lun, hba_private); 570 } else { 571 trace_scsi_req_parsed(d->id, lun, tag, buf[0], 572 cmd.mode, cmd.xfer); 573 if (cmd.lba != -1) { 574 trace_scsi_req_parsed_lba(d->id, lun, tag, buf[0], 575 cmd.lba); 576 } 577 578 if (cmd.xfer > INT32_MAX) { 579 req = scsi_req_alloc(&reqops_invalid_field, d, tag, lun, hba_private); 580 } else if ((d->unit_attention.key == UNIT_ATTENTION || 581 bus->unit_attention.key == UNIT_ATTENTION) && 582 (buf[0] != INQUIRY && 583 buf[0] != REPORT_LUNS && 584 buf[0] != GET_CONFIGURATION && 585 buf[0] != GET_EVENT_STATUS_NOTIFICATION && 586 587 /* 588 * If we already have a pending unit attention condition, 589 * report this one before triggering another one. 590 */ 591 !(buf[0] == REQUEST_SENSE && d->sense_is_ua))) { 592 req = scsi_req_alloc(&reqops_unit_attention, d, tag, lun, 593 hba_private); 594 } else if (lun != d->lun || 595 buf[0] == REPORT_LUNS || 596 (buf[0] == REQUEST_SENSE && d->sense_len)) { 597 req = scsi_req_alloc(&reqops_target_command, d, tag, lun, 598 hba_private); 599 } else { 600 req = scsi_device_alloc_req(d, tag, lun, buf, hba_private); 601 } 602 } 603 604 req->cmd = cmd; 605 req->resid = req->cmd.xfer; 606 607 switch (buf[0]) { 608 case INQUIRY: 609 trace_scsi_inquiry(d->id, lun, tag, cmd.buf[1], cmd.buf[2]); 610 break; 611 case TEST_UNIT_READY: 612 trace_scsi_test_unit_ready(d->id, lun, tag); 613 break; 614 case REPORT_LUNS: 615 trace_scsi_report_luns(d->id, lun, tag); 616 break; 617 case REQUEST_SENSE: 618 trace_scsi_request_sense(d->id, lun, tag); 619 break; 620 default: 621 break; 622 } 623 624 return req; 625 } 626 627 uint8_t *scsi_req_get_buf(SCSIRequest *req) 628 { 629 return req->ops->get_buf(req); 630 } 631 632 static void scsi_clear_unit_attention(SCSIRequest *req) 633 { 634 SCSISense *ua; 635 if (req->dev->unit_attention.key != UNIT_ATTENTION && 636 req->bus->unit_attention.key != UNIT_ATTENTION) { 637 return; 638 } 639 640 /* 641 * If an INQUIRY command enters the enabled command state, 642 * the device server shall [not] clear any unit attention condition; 643 * See also MMC-6, paragraphs 6.5 and 6.6.2. 644 */ 645 if (req->cmd.buf[0] == INQUIRY || 646 req->cmd.buf[0] == GET_CONFIGURATION || 647 req->cmd.buf[0] == GET_EVENT_STATUS_NOTIFICATION) { 648 return; 649 } 650 651 if (req->dev->unit_attention.key == UNIT_ATTENTION) { 652 ua = &req->dev->unit_attention; 653 } else { 654 ua = &req->bus->unit_attention; 655 } 656 657 /* 658 * If a REPORT LUNS command enters the enabled command state, [...] 659 * the device server shall clear any pending unit attention condition 660 * with an additional sense code of REPORTED LUNS DATA HAS CHANGED. 661 */ 662 if (req->cmd.buf[0] == REPORT_LUNS && 663 !(ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc && 664 ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq)) { 665 return; 666 } 667 668 *ua = SENSE_CODE(NO_SENSE); 669 } 670 671 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len) 672 { 673 int ret; 674 675 assert(len >= 14); 676 if (!req->sense_len) { 677 return 0; 678 } 679 680 ret = scsi_build_sense(req->sense, req->sense_len, buf, len, true); 681 682 /* 683 * FIXME: clearing unit attention conditions upon autosense should be done 684 * only if the UA_INTLCK_CTRL field in the Control mode page is set to 00b 685 * (SAM-5, 5.14). 686 * 687 * We assume UA_INTLCK_CTRL to be 00b for HBAs that support autosense, and 688 * 10b for HBAs that do not support it (do not call scsi_req_get_sense). 689 * Here we handle unit attention clearing for UA_INTLCK_CTRL == 00b. 690 */ 691 if (req->dev->sense_is_ua) { 692 scsi_device_unit_attention_reported(req->dev); 693 req->dev->sense_len = 0; 694 req->dev->sense_is_ua = false; 695 } 696 return ret; 697 } 698 699 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed) 700 { 701 return scsi_build_sense(dev->sense, dev->sense_len, buf, len, fixed); 702 } 703 704 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense) 705 { 706 trace_scsi_req_build_sense(req->dev->id, req->lun, req->tag, 707 sense.key, sense.asc, sense.ascq); 708 memset(req->sense, 0, 18); 709 req->sense[0] = 0x70; 710 req->sense[2] = sense.key; 711 req->sense[7] = 10; 712 req->sense[12] = sense.asc; 713 req->sense[13] = sense.ascq; 714 req->sense_len = 18; 715 } 716 717 static void scsi_req_enqueue_internal(SCSIRequest *req) 718 { 719 assert(!req->enqueued); 720 scsi_req_ref(req); 721 if (req->bus->info->get_sg_list) { 722 req->sg = req->bus->info->get_sg_list(req); 723 } else { 724 req->sg = NULL; 725 } 726 req->enqueued = true; 727 QTAILQ_INSERT_TAIL(&req->dev->requests, req, next); 728 } 729 730 int32_t scsi_req_enqueue(SCSIRequest *req) 731 { 732 int32_t rc; 733 734 assert(!req->retry); 735 scsi_req_enqueue_internal(req); 736 scsi_req_ref(req); 737 rc = req->ops->send_command(req, req->cmd.buf); 738 scsi_req_unref(req); 739 return rc; 740 } 741 742 static void scsi_req_dequeue(SCSIRequest *req) 743 { 744 trace_scsi_req_dequeue(req->dev->id, req->lun, req->tag); 745 req->retry = false; 746 if (req->enqueued) { 747 QTAILQ_REMOVE(&req->dev->requests, req, next); 748 req->enqueued = false; 749 scsi_req_unref(req); 750 } 751 } 752 753 static int scsi_get_performance_length(int num_desc, int type, int data_type) 754 { 755 /* MMC-6, paragraph 6.7. */ 756 switch (type) { 757 case 0: 758 if ((data_type & 3) == 0) { 759 /* Each descriptor is as in Table 295 - Nominal performance. */ 760 return 16 * num_desc + 8; 761 } else { 762 /* Each descriptor is as in Table 296 - Exceptions. */ 763 return 6 * num_desc + 8; 764 } 765 case 1: 766 case 4: 767 case 5: 768 return 8 * num_desc + 8; 769 case 2: 770 return 2048 * num_desc + 8; 771 case 3: 772 return 16 * num_desc + 8; 773 default: 774 return 8; 775 } 776 } 777 778 static int ata_passthrough_xfer_unit(SCSIDevice *dev, uint8_t *buf) 779 { 780 int byte_block = (buf[2] >> 2) & 0x1; 781 int type = (buf[2] >> 4) & 0x1; 782 int xfer_unit; 783 784 if (byte_block) { 785 if (type) { 786 xfer_unit = dev->blocksize; 787 } else { 788 xfer_unit = 512; 789 } 790 } else { 791 xfer_unit = 1; 792 } 793 794 return xfer_unit; 795 } 796 797 static int ata_passthrough_12_xfer_size(SCSIDevice *dev, uint8_t *buf) 798 { 799 int length = buf[2] & 0x3; 800 int xfer; 801 int unit = ata_passthrough_xfer_unit(dev, buf); 802 803 switch (length) { 804 case 0: 805 case 3: /* USB-specific. */ 806 default: 807 xfer = 0; 808 break; 809 case 1: 810 xfer = buf[3]; 811 break; 812 case 2: 813 xfer = buf[4]; 814 break; 815 } 816 817 return xfer * unit; 818 } 819 820 static int ata_passthrough_16_xfer_size(SCSIDevice *dev, uint8_t *buf) 821 { 822 int extend = buf[1] & 0x1; 823 int length = buf[2] & 0x3; 824 int xfer; 825 int unit = ata_passthrough_xfer_unit(dev, buf); 826 827 switch (length) { 828 case 0: 829 case 3: /* USB-specific. */ 830 default: 831 xfer = 0; 832 break; 833 case 1: 834 xfer = buf[4]; 835 xfer |= (extend ? buf[3] << 8 : 0); 836 break; 837 case 2: 838 xfer = buf[6]; 839 xfer |= (extend ? buf[5] << 8 : 0); 840 break; 841 } 842 843 return xfer * unit; 844 } 845 846 uint32_t scsi_data_cdb_length(uint8_t *buf) 847 { 848 if ((buf[0] >> 5) == 0 && buf[4] == 0) { 849 return 256; 850 } else { 851 return scsi_cdb_length(buf); 852 } 853 } 854 855 uint32_t scsi_cdb_length(uint8_t *buf) 856 { 857 switch (buf[0] >> 5) { 858 case 0: 859 return buf[4]; 860 break; 861 case 1: 862 case 2: 863 return lduw_be_p(&buf[7]); 864 break; 865 case 4: 866 return ldl_be_p(&buf[10]) & 0xffffffffULL; 867 break; 868 case 5: 869 return ldl_be_p(&buf[6]) & 0xffffffffULL; 870 break; 871 default: 872 return -1; 873 } 874 } 875 876 static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 877 { 878 cmd->xfer = scsi_cdb_length(buf); 879 switch (buf[0]) { 880 case TEST_UNIT_READY: 881 case REWIND: 882 case START_STOP: 883 case SET_CAPACITY: 884 case WRITE_FILEMARKS: 885 case WRITE_FILEMARKS_16: 886 case SPACE: 887 case RESERVE: 888 case RELEASE: 889 case ERASE: 890 case ALLOW_MEDIUM_REMOVAL: 891 case SEEK_10: 892 case SYNCHRONIZE_CACHE: 893 case SYNCHRONIZE_CACHE_16: 894 case LOCATE_16: 895 case LOCK_UNLOCK_CACHE: 896 case SET_CD_SPEED: 897 case SET_LIMITS: 898 case WRITE_LONG_10: 899 case UPDATE_BLOCK: 900 case RESERVE_TRACK: 901 case SET_READ_AHEAD: 902 case PRE_FETCH: 903 case PRE_FETCH_16: 904 case ALLOW_OVERWRITE: 905 cmd->xfer = 0; 906 break; 907 case VERIFY_10: 908 case VERIFY_12: 909 case VERIFY_16: 910 if ((buf[1] & 2) == 0) { 911 cmd->xfer = 0; 912 } else if ((buf[1] & 4) == 1) { 913 cmd->xfer = 1; 914 } 915 cmd->xfer *= dev->blocksize; 916 break; 917 case MODE_SENSE: 918 break; 919 case WRITE_SAME_10: 920 case WRITE_SAME_16: 921 cmd->xfer = dev->blocksize; 922 break; 923 case READ_CAPACITY_10: 924 cmd->xfer = 8; 925 break; 926 case READ_BLOCK_LIMITS: 927 cmd->xfer = 6; 928 break; 929 case SEND_VOLUME_TAG: 930 /* GPCMD_SET_STREAMING from multimedia commands. */ 931 if (dev->type == TYPE_ROM) { 932 cmd->xfer = buf[10] | (buf[9] << 8); 933 } else { 934 cmd->xfer = buf[9] | (buf[8] << 8); 935 } 936 break; 937 case WRITE_6: 938 /* length 0 means 256 blocks */ 939 if (cmd->xfer == 0) { 940 cmd->xfer = 256; 941 } 942 case WRITE_10: 943 case WRITE_VERIFY_10: 944 case WRITE_12: 945 case WRITE_VERIFY_12: 946 case WRITE_16: 947 case WRITE_VERIFY_16: 948 cmd->xfer *= dev->blocksize; 949 break; 950 case READ_6: 951 case READ_REVERSE: 952 /* length 0 means 256 blocks */ 953 if (cmd->xfer == 0) { 954 cmd->xfer = 256; 955 } 956 case READ_10: 957 case RECOVER_BUFFERED_DATA: 958 case READ_12: 959 case READ_16: 960 cmd->xfer *= dev->blocksize; 961 break; 962 case FORMAT_UNIT: 963 /* MMC mandates the parameter list to be 12-bytes long. Parameters 964 * for block devices are restricted to the header right now. */ 965 if (dev->type == TYPE_ROM && (buf[1] & 16)) { 966 cmd->xfer = 12; 967 } else { 968 cmd->xfer = (buf[1] & 16) == 0 ? 0 : (buf[1] & 32 ? 8 : 4); 969 } 970 break; 971 case INQUIRY: 972 case RECEIVE_DIAGNOSTIC: 973 case SEND_DIAGNOSTIC: 974 cmd->xfer = buf[4] | (buf[3] << 8); 975 break; 976 case READ_CD: 977 case READ_BUFFER: 978 case WRITE_BUFFER: 979 case SEND_CUE_SHEET: 980 cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16); 981 break; 982 case PERSISTENT_RESERVE_OUT: 983 cmd->xfer = ldl_be_p(&buf[5]) & 0xffffffffULL; 984 break; 985 case ERASE_12: 986 if (dev->type == TYPE_ROM) { 987 /* MMC command GET PERFORMANCE. */ 988 cmd->xfer = scsi_get_performance_length(buf[9] | (buf[8] << 8), 989 buf[10], buf[1] & 0x1f); 990 } 991 break; 992 case MECHANISM_STATUS: 993 case READ_DVD_STRUCTURE: 994 case SEND_DVD_STRUCTURE: 995 case MAINTENANCE_OUT: 996 case MAINTENANCE_IN: 997 if (dev->type == TYPE_ROM) { 998 /* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */ 999 cmd->xfer = buf[9] | (buf[8] << 8); 1000 } 1001 break; 1002 case ATA_PASSTHROUGH_12: 1003 if (dev->type == TYPE_ROM) { 1004 /* BLANK command of MMC */ 1005 cmd->xfer = 0; 1006 } else { 1007 cmd->xfer = ata_passthrough_12_xfer_size(dev, buf); 1008 } 1009 break; 1010 case ATA_PASSTHROUGH_16: 1011 cmd->xfer = ata_passthrough_16_xfer_size(dev, buf); 1012 break; 1013 } 1014 return 0; 1015 } 1016 1017 static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1018 { 1019 switch (buf[0]) { 1020 /* stream commands */ 1021 case ERASE_12: 1022 case ERASE_16: 1023 cmd->xfer = 0; 1024 break; 1025 case READ_6: 1026 case READ_REVERSE: 1027 case RECOVER_BUFFERED_DATA: 1028 case WRITE_6: 1029 cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16); 1030 if (buf[1] & 0x01) { /* fixed */ 1031 cmd->xfer *= dev->blocksize; 1032 } 1033 break; 1034 case READ_16: 1035 case READ_REVERSE_16: 1036 case VERIFY_16: 1037 case WRITE_16: 1038 cmd->xfer = buf[14] | (buf[13] << 8) | (buf[12] << 16); 1039 if (buf[1] & 0x01) { /* fixed */ 1040 cmd->xfer *= dev->blocksize; 1041 } 1042 break; 1043 case REWIND: 1044 case LOAD_UNLOAD: 1045 cmd->xfer = 0; 1046 break; 1047 case SPACE_16: 1048 cmd->xfer = buf[13] | (buf[12] << 8); 1049 break; 1050 case READ_POSITION: 1051 switch (buf[1] & 0x1f) /* operation code */ { 1052 case SHORT_FORM_BLOCK_ID: 1053 case SHORT_FORM_VENDOR_SPECIFIC: 1054 cmd->xfer = 20; 1055 break; 1056 case LONG_FORM: 1057 cmd->xfer = 32; 1058 break; 1059 case EXTENDED_FORM: 1060 cmd->xfer = buf[8] | (buf[7] << 8); 1061 break; 1062 default: 1063 return -1; 1064 } 1065 1066 break; 1067 case FORMAT_UNIT: 1068 cmd->xfer = buf[4] | (buf[3] << 8); 1069 break; 1070 /* generic commands */ 1071 default: 1072 return scsi_req_length(cmd, dev, buf); 1073 } 1074 return 0; 1075 } 1076 1077 static int scsi_req_medium_changer_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1078 { 1079 switch (buf[0]) { 1080 /* medium changer commands */ 1081 case EXCHANGE_MEDIUM: 1082 case INITIALIZE_ELEMENT_STATUS: 1083 case INITIALIZE_ELEMENT_STATUS_WITH_RANGE: 1084 case MOVE_MEDIUM: 1085 case POSITION_TO_ELEMENT: 1086 cmd->xfer = 0; 1087 break; 1088 case READ_ELEMENT_STATUS: 1089 cmd->xfer = buf[9] | (buf[8] << 8) | (buf[7] << 16); 1090 break; 1091 1092 /* generic commands */ 1093 default: 1094 return scsi_req_length(cmd, dev, buf); 1095 } 1096 return 0; 1097 } 1098 1099 1100 static void scsi_cmd_xfer_mode(SCSICommand *cmd) 1101 { 1102 if (!cmd->xfer) { 1103 cmd->mode = SCSI_XFER_NONE; 1104 return; 1105 } 1106 switch (cmd->buf[0]) { 1107 case WRITE_6: 1108 case WRITE_10: 1109 case WRITE_VERIFY_10: 1110 case WRITE_12: 1111 case WRITE_VERIFY_12: 1112 case WRITE_16: 1113 case WRITE_VERIFY_16: 1114 case VERIFY_10: 1115 case VERIFY_12: 1116 case VERIFY_16: 1117 case COPY: 1118 case COPY_VERIFY: 1119 case COMPARE: 1120 case CHANGE_DEFINITION: 1121 case LOG_SELECT: 1122 case MODE_SELECT: 1123 case MODE_SELECT_10: 1124 case SEND_DIAGNOSTIC: 1125 case WRITE_BUFFER: 1126 case FORMAT_UNIT: 1127 case REASSIGN_BLOCKS: 1128 case SEARCH_EQUAL: 1129 case SEARCH_HIGH: 1130 case SEARCH_LOW: 1131 case UPDATE_BLOCK: 1132 case WRITE_LONG_10: 1133 case WRITE_SAME_10: 1134 case WRITE_SAME_16: 1135 case UNMAP: 1136 case SEARCH_HIGH_12: 1137 case SEARCH_EQUAL_12: 1138 case SEARCH_LOW_12: 1139 case MEDIUM_SCAN: 1140 case SEND_VOLUME_TAG: 1141 case SEND_CUE_SHEET: 1142 case SEND_DVD_STRUCTURE: 1143 case PERSISTENT_RESERVE_OUT: 1144 case MAINTENANCE_OUT: 1145 cmd->mode = SCSI_XFER_TO_DEV; 1146 break; 1147 case ATA_PASSTHROUGH_12: 1148 case ATA_PASSTHROUGH_16: 1149 /* T_DIR */ 1150 cmd->mode = (cmd->buf[2] & 0x8) ? 1151 SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV; 1152 break; 1153 default: 1154 cmd->mode = SCSI_XFER_FROM_DEV; 1155 break; 1156 } 1157 } 1158 1159 static uint64_t scsi_cmd_lba(SCSICommand *cmd) 1160 { 1161 uint8_t *buf = cmd->buf; 1162 uint64_t lba; 1163 1164 switch (buf[0] >> 5) { 1165 case 0: 1166 lba = ldl_be_p(&buf[0]) & 0x1fffff; 1167 break; 1168 case 1: 1169 case 2: 1170 case 5: 1171 lba = ldl_be_p(&buf[2]) & 0xffffffffULL; 1172 break; 1173 case 4: 1174 lba = ldq_be_p(&buf[2]); 1175 break; 1176 default: 1177 lba = -1; 1178 1179 } 1180 return lba; 1181 } 1182 1183 int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1184 { 1185 int rc; 1186 1187 switch (buf[0] >> 5) { 1188 case 0: 1189 cmd->len = 6; 1190 break; 1191 case 1: 1192 case 2: 1193 cmd->len = 10; 1194 break; 1195 case 4: 1196 cmd->len = 16; 1197 break; 1198 case 5: 1199 cmd->len = 12; 1200 break; 1201 default: 1202 return -1; 1203 } 1204 1205 switch (dev->type) { 1206 case TYPE_TAPE: 1207 rc = scsi_req_stream_length(cmd, dev, buf); 1208 break; 1209 case TYPE_MEDIUM_CHANGER: 1210 rc = scsi_req_medium_changer_length(cmd, dev, buf); 1211 break; 1212 default: 1213 rc = scsi_req_length(cmd, dev, buf); 1214 break; 1215 } 1216 1217 if (rc != 0) 1218 return rc; 1219 1220 memcpy(cmd->buf, buf, cmd->len); 1221 scsi_cmd_xfer_mode(cmd); 1222 cmd->lba = scsi_cmd_lba(cmd); 1223 return 0; 1224 } 1225 1226 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense) 1227 { 1228 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); 1229 1230 scsi_device_set_ua(dev, sense); 1231 if (bus->info->change) { 1232 bus->info->change(bus, dev, sense); 1233 } 1234 } 1235 1236 /* 1237 * Predefined sense codes 1238 */ 1239 1240 /* No sense data available */ 1241 const struct SCSISense sense_code_NO_SENSE = { 1242 .key = NO_SENSE , .asc = 0x00 , .ascq = 0x00 1243 }; 1244 1245 /* LUN not ready, Manual intervention required */ 1246 const struct SCSISense sense_code_LUN_NOT_READY = { 1247 .key = NOT_READY, .asc = 0x04, .ascq = 0x03 1248 }; 1249 1250 /* LUN not ready, Medium not present */ 1251 const struct SCSISense sense_code_NO_MEDIUM = { 1252 .key = NOT_READY, .asc = 0x3a, .ascq = 0x00 1253 }; 1254 1255 /* LUN not ready, medium removal prevented */ 1256 const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = { 1257 .key = NOT_READY, .asc = 0x53, .ascq = 0x02 1258 }; 1259 1260 /* Hardware error, internal target failure */ 1261 const struct SCSISense sense_code_TARGET_FAILURE = { 1262 .key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00 1263 }; 1264 1265 /* Illegal request, invalid command operation code */ 1266 const struct SCSISense sense_code_INVALID_OPCODE = { 1267 .key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00 1268 }; 1269 1270 /* Illegal request, LBA out of range */ 1271 const struct SCSISense sense_code_LBA_OUT_OF_RANGE = { 1272 .key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00 1273 }; 1274 1275 /* Illegal request, Invalid field in CDB */ 1276 const struct SCSISense sense_code_INVALID_FIELD = { 1277 .key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00 1278 }; 1279 1280 /* Illegal request, Invalid field in parameter list */ 1281 const struct SCSISense sense_code_INVALID_PARAM = { 1282 .key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x00 1283 }; 1284 1285 /* Illegal request, Parameter list length error */ 1286 const struct SCSISense sense_code_INVALID_PARAM_LEN = { 1287 .key = ILLEGAL_REQUEST, .asc = 0x1a, .ascq = 0x00 1288 }; 1289 1290 /* Illegal request, LUN not supported */ 1291 const struct SCSISense sense_code_LUN_NOT_SUPPORTED = { 1292 .key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00 1293 }; 1294 1295 /* Illegal request, Saving parameters not supported */ 1296 const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = { 1297 .key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00 1298 }; 1299 1300 /* Illegal request, Incompatible medium installed */ 1301 const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = { 1302 .key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00 1303 }; 1304 1305 /* Illegal request, medium removal prevented */ 1306 const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = { 1307 .key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x02 1308 }; 1309 1310 /* Illegal request, Invalid Transfer Tag */ 1311 const struct SCSISense sense_code_INVALID_TAG = { 1312 .key = ILLEGAL_REQUEST, .asc = 0x4b, .ascq = 0x01 1313 }; 1314 1315 /* Command aborted, I/O process terminated */ 1316 const struct SCSISense sense_code_IO_ERROR = { 1317 .key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06 1318 }; 1319 1320 /* Command aborted, I_T Nexus loss occurred */ 1321 const struct SCSISense sense_code_I_T_NEXUS_LOSS = { 1322 .key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07 1323 }; 1324 1325 /* Command aborted, Logical Unit failure */ 1326 const struct SCSISense sense_code_LUN_FAILURE = { 1327 .key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01 1328 }; 1329 1330 /* Command aborted, Overlapped Commands Attempted */ 1331 const struct SCSISense sense_code_OVERLAPPED_COMMANDS = { 1332 .key = ABORTED_COMMAND, .asc = 0x4e, .ascq = 0x00 1333 }; 1334 1335 /* Unit attention, Capacity data has changed */ 1336 const struct SCSISense sense_code_CAPACITY_CHANGED = { 1337 .key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09 1338 }; 1339 1340 /* Unit attention, Power on, reset or bus device reset occurred */ 1341 const struct SCSISense sense_code_RESET = { 1342 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00 1343 }; 1344 1345 /* Unit attention, No medium */ 1346 const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = { 1347 .key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00 1348 }; 1349 1350 /* Unit attention, Medium may have changed */ 1351 const struct SCSISense sense_code_MEDIUM_CHANGED = { 1352 .key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00 1353 }; 1354 1355 /* Unit attention, Reported LUNs data has changed */ 1356 const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = { 1357 .key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e 1358 }; 1359 1360 /* Unit attention, Device internal reset */ 1361 const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = { 1362 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04 1363 }; 1364 1365 /* Data Protection, Write Protected */ 1366 const struct SCSISense sense_code_WRITE_PROTECTED = { 1367 .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00 1368 }; 1369 1370 /* 1371 * scsi_build_sense 1372 * 1373 * Convert between fixed and descriptor sense buffers 1374 */ 1375 int scsi_build_sense(uint8_t *in_buf, int in_len, 1376 uint8_t *buf, int len, bool fixed) 1377 { 1378 bool fixed_in; 1379 SCSISense sense; 1380 if (!fixed && len < 8) { 1381 return 0; 1382 } 1383 1384 if (in_len == 0) { 1385 sense.key = NO_SENSE; 1386 sense.asc = 0; 1387 sense.ascq = 0; 1388 } else { 1389 fixed_in = (in_buf[0] & 2) == 0; 1390 1391 if (fixed == fixed_in) { 1392 memcpy(buf, in_buf, MIN(len, in_len)); 1393 return MIN(len, in_len); 1394 } 1395 1396 if (fixed_in) { 1397 sense.key = in_buf[2]; 1398 sense.asc = in_buf[12]; 1399 sense.ascq = in_buf[13]; 1400 } else { 1401 sense.key = in_buf[1]; 1402 sense.asc = in_buf[2]; 1403 sense.ascq = in_buf[3]; 1404 } 1405 } 1406 1407 memset(buf, 0, len); 1408 if (fixed) { 1409 /* Return fixed format sense buffer */ 1410 buf[0] = 0x70; 1411 buf[2] = sense.key; 1412 buf[7] = 10; 1413 buf[12] = sense.asc; 1414 buf[13] = sense.ascq; 1415 return MIN(len, SCSI_SENSE_LEN); 1416 } else { 1417 /* Return descriptor format sense buffer */ 1418 buf[0] = 0x72; 1419 buf[1] = sense.key; 1420 buf[2] = sense.asc; 1421 buf[3] = sense.ascq; 1422 return 8; 1423 } 1424 } 1425 1426 static const char *scsi_command_name(uint8_t cmd) 1427 { 1428 static const char *names[] = { 1429 [ TEST_UNIT_READY ] = "TEST_UNIT_READY", 1430 [ REWIND ] = "REWIND", 1431 [ REQUEST_SENSE ] = "REQUEST_SENSE", 1432 [ FORMAT_UNIT ] = "FORMAT_UNIT", 1433 [ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS", 1434 [ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS", 1435 /* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */ 1436 [ READ_6 ] = "READ_6", 1437 [ WRITE_6 ] = "WRITE_6", 1438 [ SET_CAPACITY ] = "SET_CAPACITY", 1439 [ READ_REVERSE ] = "READ_REVERSE", 1440 [ WRITE_FILEMARKS ] = "WRITE_FILEMARKS", 1441 [ SPACE ] = "SPACE", 1442 [ INQUIRY ] = "INQUIRY", 1443 [ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA", 1444 [ MAINTENANCE_IN ] = "MAINTENANCE_IN", 1445 [ MAINTENANCE_OUT ] = "MAINTENANCE_OUT", 1446 [ MODE_SELECT ] = "MODE_SELECT", 1447 [ RESERVE ] = "RESERVE", 1448 [ RELEASE ] = "RELEASE", 1449 [ COPY ] = "COPY", 1450 [ ERASE ] = "ERASE", 1451 [ MODE_SENSE ] = "MODE_SENSE", 1452 [ START_STOP ] = "START_STOP/LOAD_UNLOAD", 1453 /* LOAD_UNLOAD and START_STOP use the same operation code */ 1454 [ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC", 1455 [ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC", 1456 [ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL", 1457 [ READ_CAPACITY_10 ] = "READ_CAPACITY_10", 1458 [ READ_10 ] = "READ_10", 1459 [ WRITE_10 ] = "WRITE_10", 1460 [ SEEK_10 ] = "SEEK_10/POSITION_TO_ELEMENT", 1461 /* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */ 1462 [ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10", 1463 [ VERIFY_10 ] = "VERIFY_10", 1464 [ SEARCH_HIGH ] = "SEARCH_HIGH", 1465 [ SEARCH_EQUAL ] = "SEARCH_EQUAL", 1466 [ SEARCH_LOW ] = "SEARCH_LOW", 1467 [ SET_LIMITS ] = "SET_LIMITS", 1468 [ PRE_FETCH ] = "PRE_FETCH/READ_POSITION", 1469 /* READ_POSITION and PRE_FETCH use the same operation code */ 1470 [ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE", 1471 [ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE", 1472 [ READ_DEFECT_DATA ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE", 1473 /* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */ 1474 [ MEDIUM_SCAN ] = "MEDIUM_SCAN", 1475 [ COMPARE ] = "COMPARE", 1476 [ COPY_VERIFY ] = "COPY_VERIFY", 1477 [ WRITE_BUFFER ] = "WRITE_BUFFER", 1478 [ READ_BUFFER ] = "READ_BUFFER", 1479 [ UPDATE_BLOCK ] = "UPDATE_BLOCK", 1480 [ READ_LONG_10 ] = "READ_LONG_10", 1481 [ WRITE_LONG_10 ] = "WRITE_LONG_10", 1482 [ CHANGE_DEFINITION ] = "CHANGE_DEFINITION", 1483 [ WRITE_SAME_10 ] = "WRITE_SAME_10", 1484 [ UNMAP ] = "UNMAP", 1485 [ READ_TOC ] = "READ_TOC", 1486 [ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT", 1487 [ SANITIZE ] = "SANITIZE", 1488 [ GET_CONFIGURATION ] = "GET_CONFIGURATION", 1489 [ LOG_SELECT ] = "LOG_SELECT", 1490 [ LOG_SENSE ] = "LOG_SENSE", 1491 [ MODE_SELECT_10 ] = "MODE_SELECT_10", 1492 [ RESERVE_10 ] = "RESERVE_10", 1493 [ RELEASE_10 ] = "RELEASE_10", 1494 [ MODE_SENSE_10 ] = "MODE_SENSE_10", 1495 [ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN", 1496 [ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT", 1497 [ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16", 1498 [ EXTENDED_COPY ] = "EXTENDED_COPY", 1499 [ ATA_PASSTHROUGH_16 ] = "ATA_PASSTHROUGH_16", 1500 [ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN", 1501 [ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT", 1502 [ READ_16 ] = "READ_16", 1503 [ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE", 1504 [ WRITE_16 ] = "WRITE_16", 1505 [ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16", 1506 [ VERIFY_16 ] = "VERIFY_16", 1507 [ PRE_FETCH_16 ] = "PRE_FETCH_16", 1508 [ SYNCHRONIZE_CACHE_16 ] = "SPACE_16/SYNCHRONIZE_CACHE_16", 1509 /* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */ 1510 [ LOCATE_16 ] = "LOCATE_16", 1511 [ WRITE_SAME_16 ] = "ERASE_16/WRITE_SAME_16", 1512 /* ERASE_16 and WRITE_SAME_16 use the same operation code */ 1513 [ SERVICE_ACTION_IN_16 ] = "SERVICE_ACTION_IN_16", 1514 [ WRITE_LONG_16 ] = "WRITE_LONG_16", 1515 [ REPORT_LUNS ] = "REPORT_LUNS", 1516 [ ATA_PASSTHROUGH_12 ] = "BLANK/ATA_PASSTHROUGH_12", 1517 [ MOVE_MEDIUM ] = "MOVE_MEDIUM", 1518 [ EXCHANGE_MEDIUM ] = "EXCHANGE MEDIUM", 1519 [ READ_12 ] = "READ_12", 1520 [ WRITE_12 ] = "WRITE_12", 1521 [ ERASE_12 ] = "ERASE_12/GET_PERFORMANCE", 1522 /* ERASE_12 and GET_PERFORMANCE use the same operation code */ 1523 [ SERVICE_ACTION_IN_12 ] = "SERVICE_ACTION_IN_12", 1524 [ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12", 1525 [ VERIFY_12 ] = "VERIFY_12", 1526 [ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12", 1527 [ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12", 1528 [ SEARCH_LOW_12 ] = "SEARCH_LOW_12", 1529 [ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS", 1530 [ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG/SET_STREAMING", 1531 /* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */ 1532 [ READ_CD ] = "READ_CD", 1533 [ READ_DEFECT_DATA_12 ] = "READ_DEFECT_DATA_12", 1534 [ READ_DVD_STRUCTURE ] = "READ_DVD_STRUCTURE", 1535 [ RESERVE_TRACK ] = "RESERVE_TRACK", 1536 [ SEND_CUE_SHEET ] = "SEND_CUE_SHEET", 1537 [ SEND_DVD_STRUCTURE ] = "SEND_DVD_STRUCTURE", 1538 [ SET_CD_SPEED ] = "SET_CD_SPEED", 1539 [ SET_READ_AHEAD ] = "SET_READ_AHEAD", 1540 [ ALLOW_OVERWRITE ] = "ALLOW_OVERWRITE", 1541 [ MECHANISM_STATUS ] = "MECHANISM_STATUS", 1542 }; 1543 1544 if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL) 1545 return "*UNKNOWN*"; 1546 return names[cmd]; 1547 } 1548 1549 SCSIRequest *scsi_req_ref(SCSIRequest *req) 1550 { 1551 assert(req->refcount > 0); 1552 req->refcount++; 1553 return req; 1554 } 1555 1556 void scsi_req_unref(SCSIRequest *req) 1557 { 1558 assert(req->refcount > 0); 1559 if (--req->refcount == 0) { 1560 BusState *qbus = req->dev->qdev.parent_bus; 1561 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, qbus); 1562 1563 if (bus->info->free_request && req->hba_private) { 1564 bus->info->free_request(bus, req->hba_private); 1565 } 1566 if (req->ops->free_req) { 1567 req->ops->free_req(req); 1568 } 1569 object_unref(OBJECT(req->dev)); 1570 object_unref(OBJECT(qbus->parent)); 1571 g_free(req); 1572 } 1573 } 1574 1575 /* Tell the device that we finished processing this chunk of I/O. It 1576 will start the next chunk or complete the command. */ 1577 void scsi_req_continue(SCSIRequest *req) 1578 { 1579 if (req->io_canceled) { 1580 trace_scsi_req_continue_canceled(req->dev->id, req->lun, req->tag); 1581 return; 1582 } 1583 trace_scsi_req_continue(req->dev->id, req->lun, req->tag); 1584 if (req->cmd.mode == SCSI_XFER_TO_DEV) { 1585 req->ops->write_data(req); 1586 } else { 1587 req->ops->read_data(req); 1588 } 1589 } 1590 1591 /* Called by the devices when data is ready for the HBA. The HBA should 1592 start a DMA operation to read or fill the device's data buffer. 1593 Once it completes, calling scsi_req_continue will restart I/O. */ 1594 void scsi_req_data(SCSIRequest *req, int len) 1595 { 1596 uint8_t *buf; 1597 if (req->io_canceled) { 1598 trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len); 1599 return; 1600 } 1601 trace_scsi_req_data(req->dev->id, req->lun, req->tag, len); 1602 assert(req->cmd.mode != SCSI_XFER_NONE); 1603 if (!req->sg) { 1604 req->resid -= len; 1605 req->bus->info->transfer_data(req, len); 1606 return; 1607 } 1608 1609 /* If the device calls scsi_req_data and the HBA specified a 1610 * scatter/gather list, the transfer has to happen in a single 1611 * step. */ 1612 assert(!req->dma_started); 1613 req->dma_started = true; 1614 1615 buf = scsi_req_get_buf(req); 1616 if (req->cmd.mode == SCSI_XFER_FROM_DEV) { 1617 req->resid = dma_buf_read(buf, len, req->sg); 1618 } else { 1619 req->resid = dma_buf_write(buf, len, req->sg); 1620 } 1621 scsi_req_continue(req); 1622 } 1623 1624 void scsi_req_print(SCSIRequest *req) 1625 { 1626 FILE *fp = stderr; 1627 int i; 1628 1629 fprintf(fp, "[%s id=%d] %s", 1630 req->dev->qdev.parent_bus->name, 1631 req->dev->id, 1632 scsi_command_name(req->cmd.buf[0])); 1633 for (i = 1; i < req->cmd.len; i++) { 1634 fprintf(fp, " 0x%02x", req->cmd.buf[i]); 1635 } 1636 switch (req->cmd.mode) { 1637 case SCSI_XFER_NONE: 1638 fprintf(fp, " - none\n"); 1639 break; 1640 case SCSI_XFER_FROM_DEV: 1641 fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer); 1642 break; 1643 case SCSI_XFER_TO_DEV: 1644 fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer); 1645 break; 1646 default: 1647 fprintf(fp, " - Oops\n"); 1648 break; 1649 } 1650 } 1651 1652 void scsi_req_complete(SCSIRequest *req, int status) 1653 { 1654 assert(req->status == -1); 1655 req->status = status; 1656 1657 assert(req->sense_len <= sizeof(req->sense)); 1658 if (status == GOOD) { 1659 req->sense_len = 0; 1660 } 1661 1662 if (req->sense_len) { 1663 memcpy(req->dev->sense, req->sense, req->sense_len); 1664 req->dev->sense_len = req->sense_len; 1665 req->dev->sense_is_ua = (req->ops == &reqops_unit_attention); 1666 } else { 1667 req->dev->sense_len = 0; 1668 req->dev->sense_is_ua = false; 1669 } 1670 1671 /* 1672 * Unit attention state is now stored in the device's sense buffer 1673 * if the HBA didn't do autosense. Clear the pending unit attention 1674 * flags. 1675 */ 1676 scsi_clear_unit_attention(req); 1677 1678 scsi_req_ref(req); 1679 scsi_req_dequeue(req); 1680 req->bus->info->complete(req, req->status, req->resid); 1681 scsi_req_unref(req); 1682 } 1683 1684 void scsi_req_cancel(SCSIRequest *req) 1685 { 1686 trace_scsi_req_cancel(req->dev->id, req->lun, req->tag); 1687 if (!req->enqueued) { 1688 return; 1689 } 1690 scsi_req_ref(req); 1691 scsi_req_dequeue(req); 1692 req->io_canceled = true; 1693 if (req->ops->cancel_io) { 1694 req->ops->cancel_io(req); 1695 } 1696 if (req->bus->info->cancel) { 1697 req->bus->info->cancel(req); 1698 } 1699 scsi_req_unref(req); 1700 } 1701 1702 void scsi_req_abort(SCSIRequest *req, int status) 1703 { 1704 if (!req->enqueued) { 1705 return; 1706 } 1707 scsi_req_ref(req); 1708 scsi_req_dequeue(req); 1709 req->io_canceled = true; 1710 if (req->ops->cancel_io) { 1711 req->ops->cancel_io(req); 1712 } 1713 scsi_req_complete(req, status); 1714 scsi_req_unref(req); 1715 } 1716 1717 static int scsi_ua_precedence(SCSISense sense) 1718 { 1719 if (sense.key != UNIT_ATTENTION) { 1720 return INT_MAX; 1721 } 1722 if (sense.asc == 0x29 && sense.ascq == 0x04) { 1723 /* DEVICE INTERNAL RESET goes with POWER ON OCCURRED */ 1724 return 1; 1725 } else if (sense.asc == 0x3F && sense.ascq == 0x01) { 1726 /* MICROCODE HAS BEEN CHANGED goes with SCSI BUS RESET OCCURRED */ 1727 return 2; 1728 } else if (sense.asc == 0x29 && (sense.ascq == 0x05 || sense.ascq == 0x06)) { 1729 /* These two go with "all others". */ 1730 ; 1731 } else if (sense.asc == 0x29 && sense.ascq <= 0x07) { 1732 /* POWER ON, RESET OR BUS DEVICE RESET OCCURRED = 0 1733 * POWER ON OCCURRED = 1 1734 * SCSI BUS RESET OCCURRED = 2 1735 * BUS DEVICE RESET FUNCTION OCCURRED = 3 1736 * I_T NEXUS LOSS OCCURRED = 7 1737 */ 1738 return sense.ascq; 1739 } else if (sense.asc == 0x2F && sense.ascq == 0x01) { 1740 /* COMMANDS CLEARED BY POWER LOSS NOTIFICATION */ 1741 return 8; 1742 } 1743 return (sense.asc << 8) | sense.ascq; 1744 } 1745 1746 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense) 1747 { 1748 int prec1, prec2; 1749 if (sense.key != UNIT_ATTENTION) { 1750 return; 1751 } 1752 trace_scsi_device_set_ua(sdev->id, sdev->lun, sense.key, 1753 sense.asc, sense.ascq); 1754 1755 /* 1756 * Override a pre-existing unit attention condition, except for a more 1757 * important reset condition. 1758 */ 1759 prec1 = scsi_ua_precedence(sdev->unit_attention); 1760 prec2 = scsi_ua_precedence(sense); 1761 if (prec2 < prec1) { 1762 sdev->unit_attention = sense; 1763 } 1764 } 1765 1766 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense) 1767 { 1768 SCSIRequest *req; 1769 1770 while (!QTAILQ_EMPTY(&sdev->requests)) { 1771 req = QTAILQ_FIRST(&sdev->requests); 1772 scsi_req_cancel(req); 1773 } 1774 1775 scsi_device_set_ua(sdev, sense); 1776 } 1777 1778 static char *scsibus_get_dev_path(DeviceState *dev) 1779 { 1780 SCSIDevice *d = DO_UPCAST(SCSIDevice, qdev, dev); 1781 DeviceState *hba = dev->parent_bus->parent; 1782 char *id; 1783 char *path; 1784 1785 id = qdev_get_dev_path(hba); 1786 if (id) { 1787 path = g_strdup_printf("%s/%d:%d:%d", id, d->channel, d->id, d->lun); 1788 } else { 1789 path = g_strdup_printf("%d:%d:%d", d->channel, d->id, d->lun); 1790 } 1791 g_free(id); 1792 return path; 1793 } 1794 1795 static char *scsibus_get_fw_dev_path(DeviceState *dev) 1796 { 1797 SCSIDevice *d = SCSI_DEVICE(dev); 1798 return g_strdup_printf("channel@%x/%s@%x,%x", d->channel, 1799 qdev_fw_name(dev), d->id, d->lun); 1800 } 1801 1802 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun) 1803 { 1804 BusChild *kid; 1805 SCSIDevice *target_dev = NULL; 1806 1807 QTAILQ_FOREACH_REVERSE(kid, &bus->qbus.children, ChildrenHead, sibling) { 1808 DeviceState *qdev = kid->child; 1809 SCSIDevice *dev = SCSI_DEVICE(qdev); 1810 1811 if (dev->channel == channel && dev->id == id) { 1812 if (dev->lun == lun) { 1813 return dev; 1814 } 1815 target_dev = dev; 1816 } 1817 } 1818 return target_dev; 1819 } 1820 1821 /* SCSI request list. For simplicity, pv points to the whole device */ 1822 1823 static void put_scsi_requests(QEMUFile *f, void *pv, size_t size) 1824 { 1825 SCSIDevice *s = pv; 1826 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); 1827 SCSIRequest *req; 1828 1829 QTAILQ_FOREACH(req, &s->requests, next) { 1830 assert(!req->io_canceled); 1831 assert(req->status == -1); 1832 assert(req->enqueued); 1833 1834 qemu_put_sbyte(f, req->retry ? 1 : 2); 1835 qemu_put_buffer(f, req->cmd.buf, sizeof(req->cmd.buf)); 1836 qemu_put_be32s(f, &req->tag); 1837 qemu_put_be32s(f, &req->lun); 1838 if (bus->info->save_request) { 1839 bus->info->save_request(f, req); 1840 } 1841 if (req->ops->save_request) { 1842 req->ops->save_request(f, req); 1843 } 1844 } 1845 qemu_put_sbyte(f, 0); 1846 } 1847 1848 static int get_scsi_requests(QEMUFile *f, void *pv, size_t size) 1849 { 1850 SCSIDevice *s = pv; 1851 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); 1852 int8_t sbyte; 1853 1854 while ((sbyte = qemu_get_sbyte(f)) > 0) { 1855 uint8_t buf[SCSI_CMD_BUF_SIZE]; 1856 uint32_t tag; 1857 uint32_t lun; 1858 SCSIRequest *req; 1859 1860 qemu_get_buffer(f, buf, sizeof(buf)); 1861 qemu_get_be32s(f, &tag); 1862 qemu_get_be32s(f, &lun); 1863 req = scsi_req_new(s, tag, lun, buf, NULL); 1864 req->retry = (sbyte == 1); 1865 if (bus->info->load_request) { 1866 req->hba_private = bus->info->load_request(f, req); 1867 } 1868 if (req->ops->load_request) { 1869 req->ops->load_request(f, req); 1870 } 1871 1872 /* Just restart it later. */ 1873 scsi_req_enqueue_internal(req); 1874 1875 /* At this point, the request will be kept alive by the reference 1876 * added by scsi_req_enqueue_internal, so we can release our reference. 1877 * The HBA of course will add its own reference in the load_request 1878 * callback if it needs to hold on the SCSIRequest. 1879 */ 1880 scsi_req_unref(req); 1881 } 1882 1883 return 0; 1884 } 1885 1886 static int scsi_qdev_unplug(DeviceState *qdev) 1887 { 1888 SCSIDevice *dev = SCSI_DEVICE(qdev); 1889 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); 1890 1891 if (bus->info->hot_unplug) { 1892 bus->info->hot_unplug(bus, dev); 1893 } 1894 return qdev_simple_unplug_cb(qdev); 1895 } 1896 1897 static const VMStateInfo vmstate_info_scsi_requests = { 1898 .name = "scsi-requests", 1899 .get = get_scsi_requests, 1900 .put = put_scsi_requests, 1901 }; 1902 1903 const VMStateDescription vmstate_scsi_device = { 1904 .name = "SCSIDevice", 1905 .version_id = 1, 1906 .minimum_version_id = 1, 1907 .minimum_version_id_old = 1, 1908 .fields = (VMStateField[]) { 1909 VMSTATE_UINT8(unit_attention.key, SCSIDevice), 1910 VMSTATE_UINT8(unit_attention.asc, SCSIDevice), 1911 VMSTATE_UINT8(unit_attention.ascq, SCSIDevice), 1912 VMSTATE_BOOL(sense_is_ua, SCSIDevice), 1913 VMSTATE_UINT8_ARRAY(sense, SCSIDevice, SCSI_SENSE_BUF_SIZE), 1914 VMSTATE_UINT32(sense_len, SCSIDevice), 1915 { 1916 .name = "requests", 1917 .version_id = 0, 1918 .field_exists = NULL, 1919 .size = 0, /* ouch */ 1920 .info = &vmstate_info_scsi_requests, 1921 .flags = VMS_SINGLE, 1922 .offset = 0, 1923 }, 1924 VMSTATE_END_OF_LIST() 1925 } 1926 }; 1927 1928 static void scsi_device_class_init(ObjectClass *klass, void *data) 1929 { 1930 DeviceClass *k = DEVICE_CLASS(klass); 1931 set_bit(DEVICE_CATEGORY_STORAGE, k->categories); 1932 k->bus_type = TYPE_SCSI_BUS; 1933 k->init = scsi_qdev_init; 1934 k->unplug = scsi_qdev_unplug; 1935 k->exit = scsi_qdev_exit; 1936 k->props = scsi_props; 1937 } 1938 1939 static const TypeInfo scsi_device_type_info = { 1940 .name = TYPE_SCSI_DEVICE, 1941 .parent = TYPE_DEVICE, 1942 .instance_size = sizeof(SCSIDevice), 1943 .abstract = true, 1944 .class_size = sizeof(SCSIDeviceClass), 1945 .class_init = scsi_device_class_init, 1946 }; 1947 1948 static void scsi_register_types(void) 1949 { 1950 type_register_static(&scsi_bus_info); 1951 type_register_static(&scsi_device_type_info); 1952 } 1953 1954 type_init(scsi_register_types) 1955