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 default: 473 scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED)); 474 scsi_req_complete(req, CHECK_CONDITION); 475 return 0; 476 illegal_request: 477 scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD)); 478 scsi_req_complete(req, CHECK_CONDITION); 479 return 0; 480 } 481 482 if (!r->len) { 483 scsi_req_complete(req, GOOD); 484 } 485 return r->len; 486 } 487 488 static void scsi_target_read_data(SCSIRequest *req) 489 { 490 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 491 uint32_t n; 492 493 n = r->len; 494 if (n > 0) { 495 r->len = 0; 496 scsi_req_data(&r->req, n); 497 } else { 498 scsi_req_complete(&r->req, GOOD); 499 } 500 } 501 502 static uint8_t *scsi_target_get_buf(SCSIRequest *req) 503 { 504 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 505 506 return r->buf; 507 } 508 509 static uint8_t *scsi_target_alloc_buf(SCSIRequest *req, size_t len) 510 { 511 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 512 513 r->buf = g_malloc(len); 514 r->buf_len = len; 515 516 return r->buf; 517 } 518 519 static void scsi_target_free_buf(SCSIRequest *req) 520 { 521 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 522 523 g_free(r->buf); 524 } 525 526 static const struct SCSIReqOps reqops_target_command = { 527 .size = sizeof(SCSITargetReq), 528 .send_command = scsi_target_send_command, 529 .read_data = scsi_target_read_data, 530 .get_buf = scsi_target_get_buf, 531 .free_req = scsi_target_free_buf, 532 }; 533 534 535 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d, 536 uint32_t tag, uint32_t lun, void *hba_private) 537 { 538 SCSIRequest *req; 539 SCSIBus *bus = scsi_bus_from_device(d); 540 BusState *qbus = BUS(bus); 541 542 req = g_malloc0(reqops->size); 543 req->refcount = 1; 544 req->bus = bus; 545 req->dev = d; 546 req->tag = tag; 547 req->lun = lun; 548 req->hba_private = hba_private; 549 req->status = -1; 550 req->sense_len = 0; 551 req->ops = reqops; 552 object_ref(OBJECT(d)); 553 object_ref(OBJECT(qbus->parent)); 554 trace_scsi_req_alloc(req->dev->id, req->lun, req->tag); 555 return req; 556 } 557 558 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun, 559 uint8_t *buf, void *hba_private) 560 { 561 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus); 562 SCSIRequest *req; 563 SCSICommand cmd; 564 565 if (scsi_req_parse(&cmd, d, buf) != 0) { 566 trace_scsi_req_parse_bad(d->id, lun, tag, buf[0]); 567 req = scsi_req_alloc(&reqops_invalid_opcode, d, tag, lun, hba_private); 568 } else { 569 trace_scsi_req_parsed(d->id, lun, tag, buf[0], 570 cmd.mode, cmd.xfer); 571 if (cmd.lba != -1) { 572 trace_scsi_req_parsed_lba(d->id, lun, tag, buf[0], 573 cmd.lba); 574 } 575 576 if (cmd.xfer > INT32_MAX) { 577 req = scsi_req_alloc(&reqops_invalid_field, d, tag, lun, hba_private); 578 } else if ((d->unit_attention.key == UNIT_ATTENTION || 579 bus->unit_attention.key == UNIT_ATTENTION) && 580 (buf[0] != INQUIRY && 581 buf[0] != REPORT_LUNS && 582 buf[0] != GET_CONFIGURATION && 583 buf[0] != GET_EVENT_STATUS_NOTIFICATION && 584 585 /* 586 * If we already have a pending unit attention condition, 587 * report this one before triggering another one. 588 */ 589 !(buf[0] == REQUEST_SENSE && d->sense_is_ua))) { 590 req = scsi_req_alloc(&reqops_unit_attention, d, tag, lun, 591 hba_private); 592 } else if (lun != d->lun || 593 buf[0] == REPORT_LUNS || 594 (buf[0] == REQUEST_SENSE && d->sense_len)) { 595 req = scsi_req_alloc(&reqops_target_command, d, tag, lun, 596 hba_private); 597 } else { 598 req = scsi_device_alloc_req(d, tag, lun, buf, hba_private); 599 } 600 } 601 602 req->cmd = cmd; 603 req->resid = req->cmd.xfer; 604 605 switch (buf[0]) { 606 case INQUIRY: 607 trace_scsi_inquiry(d->id, lun, tag, cmd.buf[1], cmd.buf[2]); 608 break; 609 case TEST_UNIT_READY: 610 trace_scsi_test_unit_ready(d->id, lun, tag); 611 break; 612 case REPORT_LUNS: 613 trace_scsi_report_luns(d->id, lun, tag); 614 break; 615 case REQUEST_SENSE: 616 trace_scsi_request_sense(d->id, lun, tag); 617 break; 618 default: 619 break; 620 } 621 622 return req; 623 } 624 625 uint8_t *scsi_req_get_buf(SCSIRequest *req) 626 { 627 return req->ops->get_buf(req); 628 } 629 630 static void scsi_clear_unit_attention(SCSIRequest *req) 631 { 632 SCSISense *ua; 633 if (req->dev->unit_attention.key != UNIT_ATTENTION && 634 req->bus->unit_attention.key != UNIT_ATTENTION) { 635 return; 636 } 637 638 /* 639 * If an INQUIRY command enters the enabled command state, 640 * the device server shall [not] clear any unit attention condition; 641 * See also MMC-6, paragraphs 6.5 and 6.6.2. 642 */ 643 if (req->cmd.buf[0] == INQUIRY || 644 req->cmd.buf[0] == GET_CONFIGURATION || 645 req->cmd.buf[0] == GET_EVENT_STATUS_NOTIFICATION) { 646 return; 647 } 648 649 if (req->dev->unit_attention.key == UNIT_ATTENTION) { 650 ua = &req->dev->unit_attention; 651 } else { 652 ua = &req->bus->unit_attention; 653 } 654 655 /* 656 * If a REPORT LUNS command enters the enabled command state, [...] 657 * the device server shall clear any pending unit attention condition 658 * with an additional sense code of REPORTED LUNS DATA HAS CHANGED. 659 */ 660 if (req->cmd.buf[0] == REPORT_LUNS && 661 !(ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc && 662 ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq)) { 663 return; 664 } 665 666 *ua = SENSE_CODE(NO_SENSE); 667 } 668 669 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len) 670 { 671 int ret; 672 673 assert(len >= 14); 674 if (!req->sense_len) { 675 return 0; 676 } 677 678 ret = scsi_build_sense(req->sense, req->sense_len, buf, len, true); 679 680 /* 681 * FIXME: clearing unit attention conditions upon autosense should be done 682 * only if the UA_INTLCK_CTRL field in the Control mode page is set to 00b 683 * (SAM-5, 5.14). 684 * 685 * We assume UA_INTLCK_CTRL to be 00b for HBAs that support autosense, and 686 * 10b for HBAs that do not support it (do not call scsi_req_get_sense). 687 * Here we handle unit attention clearing for UA_INTLCK_CTRL == 00b. 688 */ 689 if (req->dev->sense_is_ua) { 690 scsi_device_unit_attention_reported(req->dev); 691 req->dev->sense_len = 0; 692 req->dev->sense_is_ua = false; 693 } 694 return ret; 695 } 696 697 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed) 698 { 699 return scsi_build_sense(dev->sense, dev->sense_len, buf, len, fixed); 700 } 701 702 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense) 703 { 704 trace_scsi_req_build_sense(req->dev->id, req->lun, req->tag, 705 sense.key, sense.asc, sense.ascq); 706 memset(req->sense, 0, 18); 707 req->sense[0] = 0x70; 708 req->sense[2] = sense.key; 709 req->sense[7] = 10; 710 req->sense[12] = sense.asc; 711 req->sense[13] = sense.ascq; 712 req->sense_len = 18; 713 } 714 715 static void scsi_req_enqueue_internal(SCSIRequest *req) 716 { 717 assert(!req->enqueued); 718 scsi_req_ref(req); 719 if (req->bus->info->get_sg_list) { 720 req->sg = req->bus->info->get_sg_list(req); 721 } else { 722 req->sg = NULL; 723 } 724 req->enqueued = true; 725 QTAILQ_INSERT_TAIL(&req->dev->requests, req, next); 726 } 727 728 int32_t scsi_req_enqueue(SCSIRequest *req) 729 { 730 int32_t rc; 731 732 assert(!req->retry); 733 scsi_req_enqueue_internal(req); 734 scsi_req_ref(req); 735 rc = req->ops->send_command(req, req->cmd.buf); 736 scsi_req_unref(req); 737 return rc; 738 } 739 740 static void scsi_req_dequeue(SCSIRequest *req) 741 { 742 trace_scsi_req_dequeue(req->dev->id, req->lun, req->tag); 743 req->retry = false; 744 if (req->enqueued) { 745 QTAILQ_REMOVE(&req->dev->requests, req, next); 746 req->enqueued = false; 747 scsi_req_unref(req); 748 } 749 } 750 751 static int scsi_get_performance_length(int num_desc, int type, int data_type) 752 { 753 /* MMC-6, paragraph 6.7. */ 754 switch (type) { 755 case 0: 756 if ((data_type & 3) == 0) { 757 /* Each descriptor is as in Table 295 - Nominal performance. */ 758 return 16 * num_desc + 8; 759 } else { 760 /* Each descriptor is as in Table 296 - Exceptions. */ 761 return 6 * num_desc + 8; 762 } 763 case 1: 764 case 4: 765 case 5: 766 return 8 * num_desc + 8; 767 case 2: 768 return 2048 * num_desc + 8; 769 case 3: 770 return 16 * num_desc + 8; 771 default: 772 return 8; 773 } 774 } 775 776 static int ata_passthrough_xfer_unit(SCSIDevice *dev, uint8_t *buf) 777 { 778 int byte_block = (buf[2] >> 2) & 0x1; 779 int type = (buf[2] >> 4) & 0x1; 780 int xfer_unit; 781 782 if (byte_block) { 783 if (type) { 784 xfer_unit = dev->blocksize; 785 } else { 786 xfer_unit = 512; 787 } 788 } else { 789 xfer_unit = 1; 790 } 791 792 return xfer_unit; 793 } 794 795 static int ata_passthrough_12_xfer_size(SCSIDevice *dev, uint8_t *buf) 796 { 797 int length = buf[2] & 0x3; 798 int xfer; 799 int unit = ata_passthrough_xfer_unit(dev, buf); 800 801 switch (length) { 802 case 0: 803 case 3: /* USB-specific. */ 804 default: 805 xfer = 0; 806 break; 807 case 1: 808 xfer = buf[3]; 809 break; 810 case 2: 811 xfer = buf[4]; 812 break; 813 } 814 815 return xfer * unit; 816 } 817 818 static int ata_passthrough_16_xfer_size(SCSIDevice *dev, uint8_t *buf) 819 { 820 int extend = buf[1] & 0x1; 821 int length = buf[2] & 0x3; 822 int xfer; 823 int unit = ata_passthrough_xfer_unit(dev, buf); 824 825 switch (length) { 826 case 0: 827 case 3: /* USB-specific. */ 828 default: 829 xfer = 0; 830 break; 831 case 1: 832 xfer = buf[4]; 833 xfer |= (extend ? buf[3] << 8 : 0); 834 break; 835 case 2: 836 xfer = buf[6]; 837 xfer |= (extend ? buf[5] << 8 : 0); 838 break; 839 } 840 841 return xfer * unit; 842 } 843 844 uint32_t scsi_data_cdb_length(uint8_t *buf) 845 { 846 if ((buf[0] >> 5) == 0 && buf[4] == 0) { 847 return 256; 848 } else { 849 return scsi_cdb_length(buf); 850 } 851 } 852 853 uint32_t scsi_cdb_length(uint8_t *buf) 854 { 855 switch (buf[0] >> 5) { 856 case 0: 857 return buf[4]; 858 break; 859 case 1: 860 case 2: 861 return lduw_be_p(&buf[7]); 862 break; 863 case 4: 864 return ldl_be_p(&buf[10]) & 0xffffffffULL; 865 break; 866 case 5: 867 return ldl_be_p(&buf[6]) & 0xffffffffULL; 868 break; 869 default: 870 return -1; 871 } 872 } 873 874 static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 875 { 876 cmd->xfer = scsi_cdb_length(buf); 877 switch (buf[0]) { 878 case TEST_UNIT_READY: 879 case REWIND: 880 case START_STOP: 881 case SET_CAPACITY: 882 case WRITE_FILEMARKS: 883 case WRITE_FILEMARKS_16: 884 case SPACE: 885 case RESERVE: 886 case RELEASE: 887 case ERASE: 888 case ALLOW_MEDIUM_REMOVAL: 889 case VERIFY_10: 890 case SEEK_10: 891 case SYNCHRONIZE_CACHE: 892 case SYNCHRONIZE_CACHE_16: 893 case LOCATE_16: 894 case LOCK_UNLOCK_CACHE: 895 case SET_CD_SPEED: 896 case SET_LIMITS: 897 case WRITE_LONG_10: 898 case UPDATE_BLOCK: 899 case RESERVE_TRACK: 900 case SET_READ_AHEAD: 901 case PRE_FETCH: 902 case PRE_FETCH_16: 903 case ALLOW_OVERWRITE: 904 cmd->xfer = 0; 905 break; 906 case MODE_SENSE: 907 break; 908 case WRITE_SAME_10: 909 case WRITE_SAME_16: 910 cmd->xfer = dev->blocksize; 911 break; 912 case READ_CAPACITY_10: 913 cmd->xfer = 8; 914 break; 915 case READ_BLOCK_LIMITS: 916 cmd->xfer = 6; 917 break; 918 case SEND_VOLUME_TAG: 919 /* GPCMD_SET_STREAMING from multimedia commands. */ 920 if (dev->type == TYPE_ROM) { 921 cmd->xfer = buf[10] | (buf[9] << 8); 922 } else { 923 cmd->xfer = buf[9] | (buf[8] << 8); 924 } 925 break; 926 case WRITE_6: 927 /* length 0 means 256 blocks */ 928 if (cmd->xfer == 0) { 929 cmd->xfer = 256; 930 } 931 case WRITE_10: 932 case WRITE_VERIFY_10: 933 case WRITE_12: 934 case WRITE_VERIFY_12: 935 case WRITE_16: 936 case WRITE_VERIFY_16: 937 cmd->xfer *= dev->blocksize; 938 break; 939 case READ_6: 940 case READ_REVERSE: 941 /* length 0 means 256 blocks */ 942 if (cmd->xfer == 0) { 943 cmd->xfer = 256; 944 } 945 case READ_10: 946 case RECOVER_BUFFERED_DATA: 947 case READ_12: 948 case READ_16: 949 cmd->xfer *= dev->blocksize; 950 break; 951 case FORMAT_UNIT: 952 /* MMC mandates the parameter list to be 12-bytes long. Parameters 953 * for block devices are restricted to the header right now. */ 954 if (dev->type == TYPE_ROM && (buf[1] & 16)) { 955 cmd->xfer = 12; 956 } else { 957 cmd->xfer = (buf[1] & 16) == 0 ? 0 : (buf[1] & 32 ? 8 : 4); 958 } 959 break; 960 case INQUIRY: 961 case RECEIVE_DIAGNOSTIC: 962 case SEND_DIAGNOSTIC: 963 cmd->xfer = buf[4] | (buf[3] << 8); 964 break; 965 case READ_CD: 966 case READ_BUFFER: 967 case WRITE_BUFFER: 968 case SEND_CUE_SHEET: 969 cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16); 970 break; 971 case PERSISTENT_RESERVE_OUT: 972 cmd->xfer = ldl_be_p(&buf[5]) & 0xffffffffULL; 973 break; 974 case ERASE_12: 975 if (dev->type == TYPE_ROM) { 976 /* MMC command GET PERFORMANCE. */ 977 cmd->xfer = scsi_get_performance_length(buf[9] | (buf[8] << 8), 978 buf[10], buf[1] & 0x1f); 979 } 980 break; 981 case MECHANISM_STATUS: 982 case READ_DVD_STRUCTURE: 983 case SEND_DVD_STRUCTURE: 984 case MAINTENANCE_OUT: 985 case MAINTENANCE_IN: 986 if (dev->type == TYPE_ROM) { 987 /* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */ 988 cmd->xfer = buf[9] | (buf[8] << 8); 989 } 990 break; 991 case ATA_PASSTHROUGH_12: 992 if (dev->type == TYPE_ROM) { 993 /* BLANK command of MMC */ 994 cmd->xfer = 0; 995 } else { 996 cmd->xfer = ata_passthrough_12_xfer_size(dev, buf); 997 } 998 break; 999 case ATA_PASSTHROUGH_16: 1000 cmd->xfer = ata_passthrough_16_xfer_size(dev, buf); 1001 break; 1002 } 1003 return 0; 1004 } 1005 1006 static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1007 { 1008 switch (buf[0]) { 1009 /* stream commands */ 1010 case ERASE_12: 1011 case ERASE_16: 1012 cmd->xfer = 0; 1013 break; 1014 case READ_6: 1015 case READ_REVERSE: 1016 case RECOVER_BUFFERED_DATA: 1017 case WRITE_6: 1018 cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16); 1019 if (buf[1] & 0x01) { /* fixed */ 1020 cmd->xfer *= dev->blocksize; 1021 } 1022 break; 1023 case READ_16: 1024 case READ_REVERSE_16: 1025 case VERIFY_16: 1026 case WRITE_16: 1027 cmd->xfer = buf[14] | (buf[13] << 8) | (buf[12] << 16); 1028 if (buf[1] & 0x01) { /* fixed */ 1029 cmd->xfer *= dev->blocksize; 1030 } 1031 break; 1032 case REWIND: 1033 case LOAD_UNLOAD: 1034 cmd->xfer = 0; 1035 break; 1036 case SPACE_16: 1037 cmd->xfer = buf[13] | (buf[12] << 8); 1038 break; 1039 case READ_POSITION: 1040 switch (buf[1] & 0x1f) /* operation code */ { 1041 case SHORT_FORM_BLOCK_ID: 1042 case SHORT_FORM_VENDOR_SPECIFIC: 1043 cmd->xfer = 20; 1044 break; 1045 case LONG_FORM: 1046 cmd->xfer = 32; 1047 break; 1048 case EXTENDED_FORM: 1049 cmd->xfer = buf[8] | (buf[7] << 8); 1050 break; 1051 default: 1052 return -1; 1053 } 1054 1055 break; 1056 case FORMAT_UNIT: 1057 cmd->xfer = buf[4] | (buf[3] << 8); 1058 break; 1059 /* generic commands */ 1060 default: 1061 return scsi_req_length(cmd, dev, buf); 1062 } 1063 return 0; 1064 } 1065 1066 static int scsi_req_medium_changer_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1067 { 1068 switch (buf[0]) { 1069 /* medium changer commands */ 1070 case EXCHANGE_MEDIUM: 1071 case INITIALIZE_ELEMENT_STATUS: 1072 case INITIALIZE_ELEMENT_STATUS_WITH_RANGE: 1073 case MOVE_MEDIUM: 1074 case POSITION_TO_ELEMENT: 1075 cmd->xfer = 0; 1076 break; 1077 case READ_ELEMENT_STATUS: 1078 cmd->xfer = buf[9] | (buf[8] << 8) | (buf[7] << 16); 1079 break; 1080 1081 /* generic commands */ 1082 default: 1083 return scsi_req_length(cmd, dev, buf); 1084 } 1085 return 0; 1086 } 1087 1088 1089 static void scsi_cmd_xfer_mode(SCSICommand *cmd) 1090 { 1091 if (!cmd->xfer) { 1092 cmd->mode = SCSI_XFER_NONE; 1093 return; 1094 } 1095 switch (cmd->buf[0]) { 1096 case WRITE_6: 1097 case WRITE_10: 1098 case WRITE_VERIFY_10: 1099 case WRITE_12: 1100 case WRITE_VERIFY_12: 1101 case WRITE_16: 1102 case WRITE_VERIFY_16: 1103 case COPY: 1104 case COPY_VERIFY: 1105 case COMPARE: 1106 case CHANGE_DEFINITION: 1107 case LOG_SELECT: 1108 case MODE_SELECT: 1109 case MODE_SELECT_10: 1110 case SEND_DIAGNOSTIC: 1111 case WRITE_BUFFER: 1112 case FORMAT_UNIT: 1113 case REASSIGN_BLOCKS: 1114 case SEARCH_EQUAL: 1115 case SEARCH_HIGH: 1116 case SEARCH_LOW: 1117 case UPDATE_BLOCK: 1118 case WRITE_LONG_10: 1119 case WRITE_SAME_10: 1120 case WRITE_SAME_16: 1121 case UNMAP: 1122 case SEARCH_HIGH_12: 1123 case SEARCH_EQUAL_12: 1124 case SEARCH_LOW_12: 1125 case MEDIUM_SCAN: 1126 case SEND_VOLUME_TAG: 1127 case SEND_CUE_SHEET: 1128 case SEND_DVD_STRUCTURE: 1129 case PERSISTENT_RESERVE_OUT: 1130 case MAINTENANCE_OUT: 1131 cmd->mode = SCSI_XFER_TO_DEV; 1132 break; 1133 case ATA_PASSTHROUGH_12: 1134 case ATA_PASSTHROUGH_16: 1135 /* T_DIR */ 1136 cmd->mode = (cmd->buf[2] & 0x8) ? 1137 SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV; 1138 break; 1139 default: 1140 cmd->mode = SCSI_XFER_FROM_DEV; 1141 break; 1142 } 1143 } 1144 1145 static uint64_t scsi_cmd_lba(SCSICommand *cmd) 1146 { 1147 uint8_t *buf = cmd->buf; 1148 uint64_t lba; 1149 1150 switch (buf[0] >> 5) { 1151 case 0: 1152 lba = ldl_be_p(&buf[0]) & 0x1fffff; 1153 break; 1154 case 1: 1155 case 2: 1156 case 5: 1157 lba = ldl_be_p(&buf[2]) & 0xffffffffULL; 1158 break; 1159 case 4: 1160 lba = ldq_be_p(&buf[2]); 1161 break; 1162 default: 1163 lba = -1; 1164 1165 } 1166 return lba; 1167 } 1168 1169 int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1170 { 1171 int rc; 1172 1173 switch (buf[0] >> 5) { 1174 case 0: 1175 cmd->len = 6; 1176 break; 1177 case 1: 1178 case 2: 1179 cmd->len = 10; 1180 break; 1181 case 4: 1182 cmd->len = 16; 1183 break; 1184 case 5: 1185 cmd->len = 12; 1186 break; 1187 default: 1188 return -1; 1189 } 1190 1191 switch (dev->type) { 1192 case TYPE_TAPE: 1193 rc = scsi_req_stream_length(cmd, dev, buf); 1194 break; 1195 case TYPE_MEDIUM_CHANGER: 1196 rc = scsi_req_medium_changer_length(cmd, dev, buf); 1197 break; 1198 default: 1199 rc = scsi_req_length(cmd, dev, buf); 1200 break; 1201 } 1202 1203 if (rc != 0) 1204 return rc; 1205 1206 memcpy(cmd->buf, buf, cmd->len); 1207 scsi_cmd_xfer_mode(cmd); 1208 cmd->lba = scsi_cmd_lba(cmd); 1209 return 0; 1210 } 1211 1212 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense) 1213 { 1214 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); 1215 1216 scsi_device_set_ua(dev, sense); 1217 if (bus->info->change) { 1218 bus->info->change(bus, dev, sense); 1219 } 1220 } 1221 1222 /* 1223 * Predefined sense codes 1224 */ 1225 1226 /* No sense data available */ 1227 const struct SCSISense sense_code_NO_SENSE = { 1228 .key = NO_SENSE , .asc = 0x00 , .ascq = 0x00 1229 }; 1230 1231 /* LUN not ready, Manual intervention required */ 1232 const struct SCSISense sense_code_LUN_NOT_READY = { 1233 .key = NOT_READY, .asc = 0x04, .ascq = 0x03 1234 }; 1235 1236 /* LUN not ready, Medium not present */ 1237 const struct SCSISense sense_code_NO_MEDIUM = { 1238 .key = NOT_READY, .asc = 0x3a, .ascq = 0x00 1239 }; 1240 1241 /* LUN not ready, medium removal prevented */ 1242 const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = { 1243 .key = NOT_READY, .asc = 0x53, .ascq = 0x02 1244 }; 1245 1246 /* Hardware error, internal target failure */ 1247 const struct SCSISense sense_code_TARGET_FAILURE = { 1248 .key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00 1249 }; 1250 1251 /* Illegal request, invalid command operation code */ 1252 const struct SCSISense sense_code_INVALID_OPCODE = { 1253 .key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00 1254 }; 1255 1256 /* Illegal request, LBA out of range */ 1257 const struct SCSISense sense_code_LBA_OUT_OF_RANGE = { 1258 .key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00 1259 }; 1260 1261 /* Illegal request, Invalid field in CDB */ 1262 const struct SCSISense sense_code_INVALID_FIELD = { 1263 .key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00 1264 }; 1265 1266 /* Illegal request, Invalid field in parameter list */ 1267 const struct SCSISense sense_code_INVALID_PARAM = { 1268 .key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x00 1269 }; 1270 1271 /* Illegal request, Parameter list length error */ 1272 const struct SCSISense sense_code_INVALID_PARAM_LEN = { 1273 .key = ILLEGAL_REQUEST, .asc = 0x1a, .ascq = 0x00 1274 }; 1275 1276 /* Illegal request, LUN not supported */ 1277 const struct SCSISense sense_code_LUN_NOT_SUPPORTED = { 1278 .key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00 1279 }; 1280 1281 /* Illegal request, Saving parameters not supported */ 1282 const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = { 1283 .key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00 1284 }; 1285 1286 /* Illegal request, Incompatible medium installed */ 1287 const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = { 1288 .key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00 1289 }; 1290 1291 /* Illegal request, medium removal prevented */ 1292 const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = { 1293 .key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x02 1294 }; 1295 1296 /* Illegal request, Invalid Transfer Tag */ 1297 const struct SCSISense sense_code_INVALID_TAG = { 1298 .key = ILLEGAL_REQUEST, .asc = 0x4b, .ascq = 0x01 1299 }; 1300 1301 /* Command aborted, I/O process terminated */ 1302 const struct SCSISense sense_code_IO_ERROR = { 1303 .key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06 1304 }; 1305 1306 /* Command aborted, I_T Nexus loss occurred */ 1307 const struct SCSISense sense_code_I_T_NEXUS_LOSS = { 1308 .key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07 1309 }; 1310 1311 /* Command aborted, Logical Unit failure */ 1312 const struct SCSISense sense_code_LUN_FAILURE = { 1313 .key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01 1314 }; 1315 1316 /* Command aborted, Overlapped Commands Attempted */ 1317 const struct SCSISense sense_code_OVERLAPPED_COMMANDS = { 1318 .key = ABORTED_COMMAND, .asc = 0x4e, .ascq = 0x00 1319 }; 1320 1321 /* Unit attention, Capacity data has changed */ 1322 const struct SCSISense sense_code_CAPACITY_CHANGED = { 1323 .key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09 1324 }; 1325 1326 /* Unit attention, Power on, reset or bus device reset occurred */ 1327 const struct SCSISense sense_code_RESET = { 1328 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00 1329 }; 1330 1331 /* Unit attention, No medium */ 1332 const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = { 1333 .key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00 1334 }; 1335 1336 /* Unit attention, Medium may have changed */ 1337 const struct SCSISense sense_code_MEDIUM_CHANGED = { 1338 .key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00 1339 }; 1340 1341 /* Unit attention, Reported LUNs data has changed */ 1342 const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = { 1343 .key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e 1344 }; 1345 1346 /* Unit attention, Device internal reset */ 1347 const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = { 1348 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04 1349 }; 1350 1351 /* Data Protection, Write Protected */ 1352 const struct SCSISense sense_code_WRITE_PROTECTED = { 1353 .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00 1354 }; 1355 1356 /* 1357 * scsi_build_sense 1358 * 1359 * Convert between fixed and descriptor sense buffers 1360 */ 1361 int scsi_build_sense(uint8_t *in_buf, int in_len, 1362 uint8_t *buf, int len, bool fixed) 1363 { 1364 bool fixed_in; 1365 SCSISense sense; 1366 if (!fixed && len < 8) { 1367 return 0; 1368 } 1369 1370 if (in_len == 0) { 1371 sense.key = NO_SENSE; 1372 sense.asc = 0; 1373 sense.ascq = 0; 1374 } else { 1375 fixed_in = (in_buf[0] & 2) == 0; 1376 1377 if (fixed == fixed_in) { 1378 memcpy(buf, in_buf, MIN(len, in_len)); 1379 return MIN(len, in_len); 1380 } 1381 1382 if (fixed_in) { 1383 sense.key = in_buf[2]; 1384 sense.asc = in_buf[12]; 1385 sense.ascq = in_buf[13]; 1386 } else { 1387 sense.key = in_buf[1]; 1388 sense.asc = in_buf[2]; 1389 sense.ascq = in_buf[3]; 1390 } 1391 } 1392 1393 memset(buf, 0, len); 1394 if (fixed) { 1395 /* Return fixed format sense buffer */ 1396 buf[0] = 0x70; 1397 buf[2] = sense.key; 1398 buf[7] = 10; 1399 buf[12] = sense.asc; 1400 buf[13] = sense.ascq; 1401 return MIN(len, SCSI_SENSE_LEN); 1402 } else { 1403 /* Return descriptor format sense buffer */ 1404 buf[0] = 0x72; 1405 buf[1] = sense.key; 1406 buf[2] = sense.asc; 1407 buf[3] = sense.ascq; 1408 return 8; 1409 } 1410 } 1411 1412 static const char *scsi_command_name(uint8_t cmd) 1413 { 1414 static const char *names[] = { 1415 [ TEST_UNIT_READY ] = "TEST_UNIT_READY", 1416 [ REWIND ] = "REWIND", 1417 [ REQUEST_SENSE ] = "REQUEST_SENSE", 1418 [ FORMAT_UNIT ] = "FORMAT_UNIT", 1419 [ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS", 1420 [ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS", 1421 /* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */ 1422 [ READ_6 ] = "READ_6", 1423 [ WRITE_6 ] = "WRITE_6", 1424 [ SET_CAPACITY ] = "SET_CAPACITY", 1425 [ READ_REVERSE ] = "READ_REVERSE", 1426 [ WRITE_FILEMARKS ] = "WRITE_FILEMARKS", 1427 [ SPACE ] = "SPACE", 1428 [ INQUIRY ] = "INQUIRY", 1429 [ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA", 1430 [ MAINTENANCE_IN ] = "MAINTENANCE_IN", 1431 [ MAINTENANCE_OUT ] = "MAINTENANCE_OUT", 1432 [ MODE_SELECT ] = "MODE_SELECT", 1433 [ RESERVE ] = "RESERVE", 1434 [ RELEASE ] = "RELEASE", 1435 [ COPY ] = "COPY", 1436 [ ERASE ] = "ERASE", 1437 [ MODE_SENSE ] = "MODE_SENSE", 1438 [ START_STOP ] = "START_STOP/LOAD_UNLOAD", 1439 /* LOAD_UNLOAD and START_STOP use the same operation code */ 1440 [ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC", 1441 [ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC", 1442 [ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL", 1443 [ READ_CAPACITY_10 ] = "READ_CAPACITY_10", 1444 [ READ_10 ] = "READ_10", 1445 [ WRITE_10 ] = "WRITE_10", 1446 [ SEEK_10 ] = "SEEK_10/POSITION_TO_ELEMENT", 1447 /* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */ 1448 [ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10", 1449 [ VERIFY_10 ] = "VERIFY_10", 1450 [ SEARCH_HIGH ] = "SEARCH_HIGH", 1451 [ SEARCH_EQUAL ] = "SEARCH_EQUAL", 1452 [ SEARCH_LOW ] = "SEARCH_LOW", 1453 [ SET_LIMITS ] = "SET_LIMITS", 1454 [ PRE_FETCH ] = "PRE_FETCH/READ_POSITION", 1455 /* READ_POSITION and PRE_FETCH use the same operation code */ 1456 [ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE", 1457 [ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE", 1458 [ READ_DEFECT_DATA ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE", 1459 /* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */ 1460 [ MEDIUM_SCAN ] = "MEDIUM_SCAN", 1461 [ COMPARE ] = "COMPARE", 1462 [ COPY_VERIFY ] = "COPY_VERIFY", 1463 [ WRITE_BUFFER ] = "WRITE_BUFFER", 1464 [ READ_BUFFER ] = "READ_BUFFER", 1465 [ UPDATE_BLOCK ] = "UPDATE_BLOCK", 1466 [ READ_LONG_10 ] = "READ_LONG_10", 1467 [ WRITE_LONG_10 ] = "WRITE_LONG_10", 1468 [ CHANGE_DEFINITION ] = "CHANGE_DEFINITION", 1469 [ WRITE_SAME_10 ] = "WRITE_SAME_10", 1470 [ UNMAP ] = "UNMAP", 1471 [ READ_TOC ] = "READ_TOC", 1472 [ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT", 1473 [ SANITIZE ] = "SANITIZE", 1474 [ GET_CONFIGURATION ] = "GET_CONFIGURATION", 1475 [ LOG_SELECT ] = "LOG_SELECT", 1476 [ LOG_SENSE ] = "LOG_SENSE", 1477 [ MODE_SELECT_10 ] = "MODE_SELECT_10", 1478 [ RESERVE_10 ] = "RESERVE_10", 1479 [ RELEASE_10 ] = "RELEASE_10", 1480 [ MODE_SENSE_10 ] = "MODE_SENSE_10", 1481 [ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN", 1482 [ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT", 1483 [ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16", 1484 [ EXTENDED_COPY ] = "EXTENDED_COPY", 1485 [ ATA_PASSTHROUGH_16 ] = "ATA_PASSTHROUGH_16", 1486 [ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN", 1487 [ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT", 1488 [ READ_16 ] = "READ_16", 1489 [ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE", 1490 [ WRITE_16 ] = "WRITE_16", 1491 [ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16", 1492 [ VERIFY_16 ] = "VERIFY_16", 1493 [ PRE_FETCH_16 ] = "PRE_FETCH_16", 1494 [ SYNCHRONIZE_CACHE_16 ] = "SPACE_16/SYNCHRONIZE_CACHE_16", 1495 /* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */ 1496 [ LOCATE_16 ] = "LOCATE_16", 1497 [ WRITE_SAME_16 ] = "ERASE_16/WRITE_SAME_16", 1498 /* ERASE_16 and WRITE_SAME_16 use the same operation code */ 1499 [ SERVICE_ACTION_IN_16 ] = "SERVICE_ACTION_IN_16", 1500 [ WRITE_LONG_16 ] = "WRITE_LONG_16", 1501 [ REPORT_LUNS ] = "REPORT_LUNS", 1502 [ ATA_PASSTHROUGH_12 ] = "BLANK/ATA_PASSTHROUGH_12", 1503 [ MOVE_MEDIUM ] = "MOVE_MEDIUM", 1504 [ EXCHANGE_MEDIUM ] = "EXCHANGE MEDIUM", 1505 [ READ_12 ] = "READ_12", 1506 [ WRITE_12 ] = "WRITE_12", 1507 [ ERASE_12 ] = "ERASE_12/GET_PERFORMANCE", 1508 /* ERASE_12 and GET_PERFORMANCE use the same operation code */ 1509 [ SERVICE_ACTION_IN_12 ] = "SERVICE_ACTION_IN_12", 1510 [ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12", 1511 [ VERIFY_12 ] = "VERIFY_12", 1512 [ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12", 1513 [ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12", 1514 [ SEARCH_LOW_12 ] = "SEARCH_LOW_12", 1515 [ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS", 1516 [ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG/SET_STREAMING", 1517 /* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */ 1518 [ READ_CD ] = "READ_CD", 1519 [ READ_DEFECT_DATA_12 ] = "READ_DEFECT_DATA_12", 1520 [ READ_DVD_STRUCTURE ] = "READ_DVD_STRUCTURE", 1521 [ RESERVE_TRACK ] = "RESERVE_TRACK", 1522 [ SEND_CUE_SHEET ] = "SEND_CUE_SHEET", 1523 [ SEND_DVD_STRUCTURE ] = "SEND_DVD_STRUCTURE", 1524 [ SET_CD_SPEED ] = "SET_CD_SPEED", 1525 [ SET_READ_AHEAD ] = "SET_READ_AHEAD", 1526 [ ALLOW_OVERWRITE ] = "ALLOW_OVERWRITE", 1527 [ MECHANISM_STATUS ] = "MECHANISM_STATUS", 1528 }; 1529 1530 if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL) 1531 return "*UNKNOWN*"; 1532 return names[cmd]; 1533 } 1534 1535 SCSIRequest *scsi_req_ref(SCSIRequest *req) 1536 { 1537 assert(req->refcount > 0); 1538 req->refcount++; 1539 return req; 1540 } 1541 1542 void scsi_req_unref(SCSIRequest *req) 1543 { 1544 assert(req->refcount > 0); 1545 if (--req->refcount == 0) { 1546 BusState *qbus = req->dev->qdev.parent_bus; 1547 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, qbus); 1548 1549 if (bus->info->free_request && req->hba_private) { 1550 bus->info->free_request(bus, req->hba_private); 1551 } 1552 if (req->ops->free_req) { 1553 req->ops->free_req(req); 1554 } 1555 object_unref(OBJECT(req->dev)); 1556 object_unref(OBJECT(qbus->parent)); 1557 g_free(req); 1558 } 1559 } 1560 1561 /* Tell the device that we finished processing this chunk of I/O. It 1562 will start the next chunk or complete the command. */ 1563 void scsi_req_continue(SCSIRequest *req) 1564 { 1565 if (req->io_canceled) { 1566 trace_scsi_req_continue_canceled(req->dev->id, req->lun, req->tag); 1567 return; 1568 } 1569 trace_scsi_req_continue(req->dev->id, req->lun, req->tag); 1570 if (req->cmd.mode == SCSI_XFER_TO_DEV) { 1571 req->ops->write_data(req); 1572 } else { 1573 req->ops->read_data(req); 1574 } 1575 } 1576 1577 /* Called by the devices when data is ready for the HBA. The HBA should 1578 start a DMA operation to read or fill the device's data buffer. 1579 Once it completes, calling scsi_req_continue will restart I/O. */ 1580 void scsi_req_data(SCSIRequest *req, int len) 1581 { 1582 uint8_t *buf; 1583 if (req->io_canceled) { 1584 trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len); 1585 return; 1586 } 1587 trace_scsi_req_data(req->dev->id, req->lun, req->tag, len); 1588 assert(req->cmd.mode != SCSI_XFER_NONE); 1589 if (!req->sg) { 1590 req->resid -= len; 1591 req->bus->info->transfer_data(req, len); 1592 return; 1593 } 1594 1595 /* If the device calls scsi_req_data and the HBA specified a 1596 * scatter/gather list, the transfer has to happen in a single 1597 * step. */ 1598 assert(!req->dma_started); 1599 req->dma_started = true; 1600 1601 buf = scsi_req_get_buf(req); 1602 if (req->cmd.mode == SCSI_XFER_FROM_DEV) { 1603 req->resid = dma_buf_read(buf, len, req->sg); 1604 } else { 1605 req->resid = dma_buf_write(buf, len, req->sg); 1606 } 1607 scsi_req_continue(req); 1608 } 1609 1610 void scsi_req_print(SCSIRequest *req) 1611 { 1612 FILE *fp = stderr; 1613 int i; 1614 1615 fprintf(fp, "[%s id=%d] %s", 1616 req->dev->qdev.parent_bus->name, 1617 req->dev->id, 1618 scsi_command_name(req->cmd.buf[0])); 1619 for (i = 1; i < req->cmd.len; i++) { 1620 fprintf(fp, " 0x%02x", req->cmd.buf[i]); 1621 } 1622 switch (req->cmd.mode) { 1623 case SCSI_XFER_NONE: 1624 fprintf(fp, " - none\n"); 1625 break; 1626 case SCSI_XFER_FROM_DEV: 1627 fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer); 1628 break; 1629 case SCSI_XFER_TO_DEV: 1630 fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer); 1631 break; 1632 default: 1633 fprintf(fp, " - Oops\n"); 1634 break; 1635 } 1636 } 1637 1638 void scsi_req_complete(SCSIRequest *req, int status) 1639 { 1640 assert(req->status == -1); 1641 req->status = status; 1642 1643 assert(req->sense_len <= sizeof(req->sense)); 1644 if (status == GOOD) { 1645 req->sense_len = 0; 1646 } 1647 1648 if (req->sense_len) { 1649 memcpy(req->dev->sense, req->sense, req->sense_len); 1650 req->dev->sense_len = req->sense_len; 1651 req->dev->sense_is_ua = (req->ops == &reqops_unit_attention); 1652 } else { 1653 req->dev->sense_len = 0; 1654 req->dev->sense_is_ua = false; 1655 } 1656 1657 /* 1658 * Unit attention state is now stored in the device's sense buffer 1659 * if the HBA didn't do autosense. Clear the pending unit attention 1660 * flags. 1661 */ 1662 scsi_clear_unit_attention(req); 1663 1664 scsi_req_ref(req); 1665 scsi_req_dequeue(req); 1666 req->bus->info->complete(req, req->status, req->resid); 1667 scsi_req_unref(req); 1668 } 1669 1670 void scsi_req_cancel(SCSIRequest *req) 1671 { 1672 trace_scsi_req_cancel(req->dev->id, req->lun, req->tag); 1673 if (!req->enqueued) { 1674 return; 1675 } 1676 scsi_req_ref(req); 1677 scsi_req_dequeue(req); 1678 req->io_canceled = true; 1679 if (req->ops->cancel_io) { 1680 req->ops->cancel_io(req); 1681 } 1682 if (req->bus->info->cancel) { 1683 req->bus->info->cancel(req); 1684 } 1685 scsi_req_unref(req); 1686 } 1687 1688 void scsi_req_abort(SCSIRequest *req, int status) 1689 { 1690 if (!req->enqueued) { 1691 return; 1692 } 1693 scsi_req_ref(req); 1694 scsi_req_dequeue(req); 1695 req->io_canceled = true; 1696 if (req->ops->cancel_io) { 1697 req->ops->cancel_io(req); 1698 } 1699 scsi_req_complete(req, status); 1700 scsi_req_unref(req); 1701 } 1702 1703 static int scsi_ua_precedence(SCSISense sense) 1704 { 1705 if (sense.key != UNIT_ATTENTION) { 1706 return INT_MAX; 1707 } 1708 if (sense.asc == 0x29 && sense.ascq == 0x04) { 1709 /* DEVICE INTERNAL RESET goes with POWER ON OCCURRED */ 1710 return 1; 1711 } else if (sense.asc == 0x3F && sense.ascq == 0x01) { 1712 /* MICROCODE HAS BEEN CHANGED goes with SCSI BUS RESET OCCURRED */ 1713 return 2; 1714 } else if (sense.asc == 0x29 && (sense.ascq == 0x05 || sense.ascq == 0x06)) { 1715 /* These two go with "all others". */ 1716 ; 1717 } else if (sense.asc == 0x29 && sense.ascq <= 0x07) { 1718 /* POWER ON, RESET OR BUS DEVICE RESET OCCURRED = 0 1719 * POWER ON OCCURRED = 1 1720 * SCSI BUS RESET OCCURRED = 2 1721 * BUS DEVICE RESET FUNCTION OCCURRED = 3 1722 * I_T NEXUS LOSS OCCURRED = 7 1723 */ 1724 return sense.ascq; 1725 } else if (sense.asc == 0x2F && sense.ascq == 0x01) { 1726 /* COMMANDS CLEARED BY POWER LOSS NOTIFICATION */ 1727 return 8; 1728 } 1729 return (sense.asc << 8) | sense.ascq; 1730 } 1731 1732 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense) 1733 { 1734 int prec1, prec2; 1735 if (sense.key != UNIT_ATTENTION) { 1736 return; 1737 } 1738 trace_scsi_device_set_ua(sdev->id, sdev->lun, sense.key, 1739 sense.asc, sense.ascq); 1740 1741 /* 1742 * Override a pre-existing unit attention condition, except for a more 1743 * important reset condition. 1744 */ 1745 prec1 = scsi_ua_precedence(sdev->unit_attention); 1746 prec2 = scsi_ua_precedence(sense); 1747 if (prec2 < prec1) { 1748 sdev->unit_attention = sense; 1749 } 1750 } 1751 1752 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense) 1753 { 1754 SCSIRequest *req; 1755 1756 while (!QTAILQ_EMPTY(&sdev->requests)) { 1757 req = QTAILQ_FIRST(&sdev->requests); 1758 scsi_req_cancel(req); 1759 } 1760 1761 scsi_device_set_ua(sdev, sense); 1762 } 1763 1764 static char *scsibus_get_dev_path(DeviceState *dev) 1765 { 1766 SCSIDevice *d = DO_UPCAST(SCSIDevice, qdev, dev); 1767 DeviceState *hba = dev->parent_bus->parent; 1768 char *id; 1769 char *path; 1770 1771 id = qdev_get_dev_path(hba); 1772 if (id) { 1773 path = g_strdup_printf("%s/%d:%d:%d", id, d->channel, d->id, d->lun); 1774 } else { 1775 path = g_strdup_printf("%d:%d:%d", d->channel, d->id, d->lun); 1776 } 1777 g_free(id); 1778 return path; 1779 } 1780 1781 static char *scsibus_get_fw_dev_path(DeviceState *dev) 1782 { 1783 SCSIDevice *d = SCSI_DEVICE(dev); 1784 return g_strdup_printf("channel@%x/%s@%x,%x", d->channel, 1785 qdev_fw_name(dev), d->id, d->lun); 1786 } 1787 1788 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun) 1789 { 1790 BusChild *kid; 1791 SCSIDevice *target_dev = NULL; 1792 1793 QTAILQ_FOREACH_REVERSE(kid, &bus->qbus.children, ChildrenHead, sibling) { 1794 DeviceState *qdev = kid->child; 1795 SCSIDevice *dev = SCSI_DEVICE(qdev); 1796 1797 if (dev->channel == channel && dev->id == id) { 1798 if (dev->lun == lun) { 1799 return dev; 1800 } 1801 target_dev = dev; 1802 } 1803 } 1804 return target_dev; 1805 } 1806 1807 /* SCSI request list. For simplicity, pv points to the whole device */ 1808 1809 static void put_scsi_requests(QEMUFile *f, void *pv, size_t size) 1810 { 1811 SCSIDevice *s = pv; 1812 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); 1813 SCSIRequest *req; 1814 1815 QTAILQ_FOREACH(req, &s->requests, next) { 1816 assert(!req->io_canceled); 1817 assert(req->status == -1); 1818 assert(req->enqueued); 1819 1820 qemu_put_sbyte(f, req->retry ? 1 : 2); 1821 qemu_put_buffer(f, req->cmd.buf, sizeof(req->cmd.buf)); 1822 qemu_put_be32s(f, &req->tag); 1823 qemu_put_be32s(f, &req->lun); 1824 if (bus->info->save_request) { 1825 bus->info->save_request(f, req); 1826 } 1827 if (req->ops->save_request) { 1828 req->ops->save_request(f, req); 1829 } 1830 } 1831 qemu_put_sbyte(f, 0); 1832 } 1833 1834 static int get_scsi_requests(QEMUFile *f, void *pv, size_t size) 1835 { 1836 SCSIDevice *s = pv; 1837 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); 1838 int8_t sbyte; 1839 1840 while ((sbyte = qemu_get_sbyte(f)) > 0) { 1841 uint8_t buf[SCSI_CMD_BUF_SIZE]; 1842 uint32_t tag; 1843 uint32_t lun; 1844 SCSIRequest *req; 1845 1846 qemu_get_buffer(f, buf, sizeof(buf)); 1847 qemu_get_be32s(f, &tag); 1848 qemu_get_be32s(f, &lun); 1849 req = scsi_req_new(s, tag, lun, buf, NULL); 1850 req->retry = (sbyte == 1); 1851 if (bus->info->load_request) { 1852 req->hba_private = bus->info->load_request(f, req); 1853 } 1854 if (req->ops->load_request) { 1855 req->ops->load_request(f, req); 1856 } 1857 1858 /* Just restart it later. */ 1859 scsi_req_enqueue_internal(req); 1860 1861 /* At this point, the request will be kept alive by the reference 1862 * added by scsi_req_enqueue_internal, so we can release our reference. 1863 * The HBA of course will add its own reference in the load_request 1864 * callback if it needs to hold on the SCSIRequest. 1865 */ 1866 scsi_req_unref(req); 1867 } 1868 1869 return 0; 1870 } 1871 1872 static int scsi_qdev_unplug(DeviceState *qdev) 1873 { 1874 SCSIDevice *dev = SCSI_DEVICE(qdev); 1875 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); 1876 1877 if (bus->info->hot_unplug) { 1878 bus->info->hot_unplug(bus, dev); 1879 } 1880 return qdev_simple_unplug_cb(qdev); 1881 } 1882 1883 static const VMStateInfo vmstate_info_scsi_requests = { 1884 .name = "scsi-requests", 1885 .get = get_scsi_requests, 1886 .put = put_scsi_requests, 1887 }; 1888 1889 const VMStateDescription vmstate_scsi_device = { 1890 .name = "SCSIDevice", 1891 .version_id = 1, 1892 .minimum_version_id = 1, 1893 .minimum_version_id_old = 1, 1894 .fields = (VMStateField[]) { 1895 VMSTATE_UINT8(unit_attention.key, SCSIDevice), 1896 VMSTATE_UINT8(unit_attention.asc, SCSIDevice), 1897 VMSTATE_UINT8(unit_attention.ascq, SCSIDevice), 1898 VMSTATE_BOOL(sense_is_ua, SCSIDevice), 1899 VMSTATE_UINT8_ARRAY(sense, SCSIDevice, SCSI_SENSE_BUF_SIZE), 1900 VMSTATE_UINT32(sense_len, SCSIDevice), 1901 { 1902 .name = "requests", 1903 .version_id = 0, 1904 .field_exists = NULL, 1905 .size = 0, /* ouch */ 1906 .info = &vmstate_info_scsi_requests, 1907 .flags = VMS_SINGLE, 1908 .offset = 0, 1909 }, 1910 VMSTATE_END_OF_LIST() 1911 } 1912 }; 1913 1914 static void scsi_device_class_init(ObjectClass *klass, void *data) 1915 { 1916 DeviceClass *k = DEVICE_CLASS(klass); 1917 set_bit(DEVICE_CATEGORY_STORAGE, k->categories); 1918 k->bus_type = TYPE_SCSI_BUS; 1919 k->init = scsi_qdev_init; 1920 k->unplug = scsi_qdev_unplug; 1921 k->exit = scsi_qdev_exit; 1922 k->props = scsi_props; 1923 } 1924 1925 static const TypeInfo scsi_device_type_info = { 1926 .name = TYPE_SCSI_DEVICE, 1927 .parent = TYPE_DEVICE, 1928 .instance_size = sizeof(SCSIDevice), 1929 .abstract = true, 1930 .class_size = sizeof(SCSIDeviceClass), 1931 .class_init = scsi_device_class_init, 1932 }; 1933 1934 static void scsi_register_types(void) 1935 { 1936 type_register_static(&scsi_bus_info); 1937 type_register_static(&scsi_device_type_info); 1938 } 1939 1940 type_init(scsi_register_types) 1941