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 SEEK_10: 890 case SYNCHRONIZE_CACHE: 891 case SYNCHRONIZE_CACHE_16: 892 case LOCATE_16: 893 case LOCK_UNLOCK_CACHE: 894 case SET_CD_SPEED: 895 case SET_LIMITS: 896 case WRITE_LONG_10: 897 case UPDATE_BLOCK: 898 case RESERVE_TRACK: 899 case SET_READ_AHEAD: 900 case PRE_FETCH: 901 case PRE_FETCH_16: 902 case ALLOW_OVERWRITE: 903 cmd->xfer = 0; 904 break; 905 case VERIFY_10: 906 case VERIFY_12: 907 case VERIFY_16: 908 if ((buf[1] & 2) == 0) { 909 cmd->xfer = 0; 910 } else if ((buf[1] & 4) == 1) { 911 cmd->xfer = 1; 912 } 913 cmd->xfer *= dev->blocksize; 914 break; 915 case MODE_SENSE: 916 break; 917 case WRITE_SAME_10: 918 case WRITE_SAME_16: 919 cmd->xfer = dev->blocksize; 920 break; 921 case READ_CAPACITY_10: 922 cmd->xfer = 8; 923 break; 924 case READ_BLOCK_LIMITS: 925 cmd->xfer = 6; 926 break; 927 case SEND_VOLUME_TAG: 928 /* GPCMD_SET_STREAMING from multimedia commands. */ 929 if (dev->type == TYPE_ROM) { 930 cmd->xfer = buf[10] | (buf[9] << 8); 931 } else { 932 cmd->xfer = buf[9] | (buf[8] << 8); 933 } 934 break; 935 case WRITE_6: 936 /* length 0 means 256 blocks */ 937 if (cmd->xfer == 0) { 938 cmd->xfer = 256; 939 } 940 case WRITE_10: 941 case WRITE_VERIFY_10: 942 case WRITE_12: 943 case WRITE_VERIFY_12: 944 case WRITE_16: 945 case WRITE_VERIFY_16: 946 cmd->xfer *= dev->blocksize; 947 break; 948 case READ_6: 949 case READ_REVERSE: 950 /* length 0 means 256 blocks */ 951 if (cmd->xfer == 0) { 952 cmd->xfer = 256; 953 } 954 case READ_10: 955 case RECOVER_BUFFERED_DATA: 956 case READ_12: 957 case READ_16: 958 cmd->xfer *= dev->blocksize; 959 break; 960 case FORMAT_UNIT: 961 /* MMC mandates the parameter list to be 12-bytes long. Parameters 962 * for block devices are restricted to the header right now. */ 963 if (dev->type == TYPE_ROM && (buf[1] & 16)) { 964 cmd->xfer = 12; 965 } else { 966 cmd->xfer = (buf[1] & 16) == 0 ? 0 : (buf[1] & 32 ? 8 : 4); 967 } 968 break; 969 case INQUIRY: 970 case RECEIVE_DIAGNOSTIC: 971 case SEND_DIAGNOSTIC: 972 cmd->xfer = buf[4] | (buf[3] << 8); 973 break; 974 case READ_CD: 975 case READ_BUFFER: 976 case WRITE_BUFFER: 977 case SEND_CUE_SHEET: 978 cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16); 979 break; 980 case PERSISTENT_RESERVE_OUT: 981 cmd->xfer = ldl_be_p(&buf[5]) & 0xffffffffULL; 982 break; 983 case ERASE_12: 984 if (dev->type == TYPE_ROM) { 985 /* MMC command GET PERFORMANCE. */ 986 cmd->xfer = scsi_get_performance_length(buf[9] | (buf[8] << 8), 987 buf[10], buf[1] & 0x1f); 988 } 989 break; 990 case MECHANISM_STATUS: 991 case READ_DVD_STRUCTURE: 992 case SEND_DVD_STRUCTURE: 993 case MAINTENANCE_OUT: 994 case MAINTENANCE_IN: 995 if (dev->type == TYPE_ROM) { 996 /* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */ 997 cmd->xfer = buf[9] | (buf[8] << 8); 998 } 999 break; 1000 case ATA_PASSTHROUGH_12: 1001 if (dev->type == TYPE_ROM) { 1002 /* BLANK command of MMC */ 1003 cmd->xfer = 0; 1004 } else { 1005 cmd->xfer = ata_passthrough_12_xfer_size(dev, buf); 1006 } 1007 break; 1008 case ATA_PASSTHROUGH_16: 1009 cmd->xfer = ata_passthrough_16_xfer_size(dev, buf); 1010 break; 1011 } 1012 return 0; 1013 } 1014 1015 static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1016 { 1017 switch (buf[0]) { 1018 /* stream commands */ 1019 case ERASE_12: 1020 case ERASE_16: 1021 cmd->xfer = 0; 1022 break; 1023 case READ_6: 1024 case READ_REVERSE: 1025 case RECOVER_BUFFERED_DATA: 1026 case WRITE_6: 1027 cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16); 1028 if (buf[1] & 0x01) { /* fixed */ 1029 cmd->xfer *= dev->blocksize; 1030 } 1031 break; 1032 case READ_16: 1033 case READ_REVERSE_16: 1034 case VERIFY_16: 1035 case WRITE_16: 1036 cmd->xfer = buf[14] | (buf[13] << 8) | (buf[12] << 16); 1037 if (buf[1] & 0x01) { /* fixed */ 1038 cmd->xfer *= dev->blocksize; 1039 } 1040 break; 1041 case REWIND: 1042 case LOAD_UNLOAD: 1043 cmd->xfer = 0; 1044 break; 1045 case SPACE_16: 1046 cmd->xfer = buf[13] | (buf[12] << 8); 1047 break; 1048 case READ_POSITION: 1049 switch (buf[1] & 0x1f) /* operation code */ { 1050 case SHORT_FORM_BLOCK_ID: 1051 case SHORT_FORM_VENDOR_SPECIFIC: 1052 cmd->xfer = 20; 1053 break; 1054 case LONG_FORM: 1055 cmd->xfer = 32; 1056 break; 1057 case EXTENDED_FORM: 1058 cmd->xfer = buf[8] | (buf[7] << 8); 1059 break; 1060 default: 1061 return -1; 1062 } 1063 1064 break; 1065 case FORMAT_UNIT: 1066 cmd->xfer = buf[4] | (buf[3] << 8); 1067 break; 1068 /* generic commands */ 1069 default: 1070 return scsi_req_length(cmd, dev, buf); 1071 } 1072 return 0; 1073 } 1074 1075 static int scsi_req_medium_changer_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1076 { 1077 switch (buf[0]) { 1078 /* medium changer commands */ 1079 case EXCHANGE_MEDIUM: 1080 case INITIALIZE_ELEMENT_STATUS: 1081 case INITIALIZE_ELEMENT_STATUS_WITH_RANGE: 1082 case MOVE_MEDIUM: 1083 case POSITION_TO_ELEMENT: 1084 cmd->xfer = 0; 1085 break; 1086 case READ_ELEMENT_STATUS: 1087 cmd->xfer = buf[9] | (buf[8] << 8) | (buf[7] << 16); 1088 break; 1089 1090 /* generic commands */ 1091 default: 1092 return scsi_req_length(cmd, dev, buf); 1093 } 1094 return 0; 1095 } 1096 1097 1098 static void scsi_cmd_xfer_mode(SCSICommand *cmd) 1099 { 1100 if (!cmd->xfer) { 1101 cmd->mode = SCSI_XFER_NONE; 1102 return; 1103 } 1104 switch (cmd->buf[0]) { 1105 case WRITE_6: 1106 case WRITE_10: 1107 case WRITE_VERIFY_10: 1108 case WRITE_12: 1109 case WRITE_VERIFY_12: 1110 case WRITE_16: 1111 case WRITE_VERIFY_16: 1112 case VERIFY_10: 1113 case VERIFY_12: 1114 case VERIFY_16: 1115 case COPY: 1116 case COPY_VERIFY: 1117 case COMPARE: 1118 case CHANGE_DEFINITION: 1119 case LOG_SELECT: 1120 case MODE_SELECT: 1121 case MODE_SELECT_10: 1122 case SEND_DIAGNOSTIC: 1123 case WRITE_BUFFER: 1124 case FORMAT_UNIT: 1125 case REASSIGN_BLOCKS: 1126 case SEARCH_EQUAL: 1127 case SEARCH_HIGH: 1128 case SEARCH_LOW: 1129 case UPDATE_BLOCK: 1130 case WRITE_LONG_10: 1131 case WRITE_SAME_10: 1132 case WRITE_SAME_16: 1133 case UNMAP: 1134 case SEARCH_HIGH_12: 1135 case SEARCH_EQUAL_12: 1136 case SEARCH_LOW_12: 1137 case MEDIUM_SCAN: 1138 case SEND_VOLUME_TAG: 1139 case SEND_CUE_SHEET: 1140 case SEND_DVD_STRUCTURE: 1141 case PERSISTENT_RESERVE_OUT: 1142 case MAINTENANCE_OUT: 1143 cmd->mode = SCSI_XFER_TO_DEV; 1144 break; 1145 case ATA_PASSTHROUGH_12: 1146 case ATA_PASSTHROUGH_16: 1147 /* T_DIR */ 1148 cmd->mode = (cmd->buf[2] & 0x8) ? 1149 SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV; 1150 break; 1151 default: 1152 cmd->mode = SCSI_XFER_FROM_DEV; 1153 break; 1154 } 1155 } 1156 1157 static uint64_t scsi_cmd_lba(SCSICommand *cmd) 1158 { 1159 uint8_t *buf = cmd->buf; 1160 uint64_t lba; 1161 1162 switch (buf[0] >> 5) { 1163 case 0: 1164 lba = ldl_be_p(&buf[0]) & 0x1fffff; 1165 break; 1166 case 1: 1167 case 2: 1168 case 5: 1169 lba = ldl_be_p(&buf[2]) & 0xffffffffULL; 1170 break; 1171 case 4: 1172 lba = ldq_be_p(&buf[2]); 1173 break; 1174 default: 1175 lba = -1; 1176 1177 } 1178 return lba; 1179 } 1180 1181 int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1182 { 1183 int rc; 1184 1185 switch (buf[0] >> 5) { 1186 case 0: 1187 cmd->len = 6; 1188 break; 1189 case 1: 1190 case 2: 1191 cmd->len = 10; 1192 break; 1193 case 4: 1194 cmd->len = 16; 1195 break; 1196 case 5: 1197 cmd->len = 12; 1198 break; 1199 default: 1200 return -1; 1201 } 1202 1203 switch (dev->type) { 1204 case TYPE_TAPE: 1205 rc = scsi_req_stream_length(cmd, dev, buf); 1206 break; 1207 case TYPE_MEDIUM_CHANGER: 1208 rc = scsi_req_medium_changer_length(cmd, dev, buf); 1209 break; 1210 default: 1211 rc = scsi_req_length(cmd, dev, buf); 1212 break; 1213 } 1214 1215 if (rc != 0) 1216 return rc; 1217 1218 memcpy(cmd->buf, buf, cmd->len); 1219 scsi_cmd_xfer_mode(cmd); 1220 cmd->lba = scsi_cmd_lba(cmd); 1221 return 0; 1222 } 1223 1224 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense) 1225 { 1226 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); 1227 1228 scsi_device_set_ua(dev, sense); 1229 if (bus->info->change) { 1230 bus->info->change(bus, dev, sense); 1231 } 1232 } 1233 1234 /* 1235 * Predefined sense codes 1236 */ 1237 1238 /* No sense data available */ 1239 const struct SCSISense sense_code_NO_SENSE = { 1240 .key = NO_SENSE , .asc = 0x00 , .ascq = 0x00 1241 }; 1242 1243 /* LUN not ready, Manual intervention required */ 1244 const struct SCSISense sense_code_LUN_NOT_READY = { 1245 .key = NOT_READY, .asc = 0x04, .ascq = 0x03 1246 }; 1247 1248 /* LUN not ready, Medium not present */ 1249 const struct SCSISense sense_code_NO_MEDIUM = { 1250 .key = NOT_READY, .asc = 0x3a, .ascq = 0x00 1251 }; 1252 1253 /* LUN not ready, medium removal prevented */ 1254 const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = { 1255 .key = NOT_READY, .asc = 0x53, .ascq = 0x02 1256 }; 1257 1258 /* Hardware error, internal target failure */ 1259 const struct SCSISense sense_code_TARGET_FAILURE = { 1260 .key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00 1261 }; 1262 1263 /* Illegal request, invalid command operation code */ 1264 const struct SCSISense sense_code_INVALID_OPCODE = { 1265 .key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00 1266 }; 1267 1268 /* Illegal request, LBA out of range */ 1269 const struct SCSISense sense_code_LBA_OUT_OF_RANGE = { 1270 .key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00 1271 }; 1272 1273 /* Illegal request, Invalid field in CDB */ 1274 const struct SCSISense sense_code_INVALID_FIELD = { 1275 .key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00 1276 }; 1277 1278 /* Illegal request, Invalid field in parameter list */ 1279 const struct SCSISense sense_code_INVALID_PARAM = { 1280 .key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x00 1281 }; 1282 1283 /* Illegal request, Parameter list length error */ 1284 const struct SCSISense sense_code_INVALID_PARAM_LEN = { 1285 .key = ILLEGAL_REQUEST, .asc = 0x1a, .ascq = 0x00 1286 }; 1287 1288 /* Illegal request, LUN not supported */ 1289 const struct SCSISense sense_code_LUN_NOT_SUPPORTED = { 1290 .key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00 1291 }; 1292 1293 /* Illegal request, Saving parameters not supported */ 1294 const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = { 1295 .key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00 1296 }; 1297 1298 /* Illegal request, Incompatible medium installed */ 1299 const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = { 1300 .key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00 1301 }; 1302 1303 /* Illegal request, medium removal prevented */ 1304 const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = { 1305 .key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x02 1306 }; 1307 1308 /* Illegal request, Invalid Transfer Tag */ 1309 const struct SCSISense sense_code_INVALID_TAG = { 1310 .key = ILLEGAL_REQUEST, .asc = 0x4b, .ascq = 0x01 1311 }; 1312 1313 /* Command aborted, I/O process terminated */ 1314 const struct SCSISense sense_code_IO_ERROR = { 1315 .key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06 1316 }; 1317 1318 /* Command aborted, I_T Nexus loss occurred */ 1319 const struct SCSISense sense_code_I_T_NEXUS_LOSS = { 1320 .key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07 1321 }; 1322 1323 /* Command aborted, Logical Unit failure */ 1324 const struct SCSISense sense_code_LUN_FAILURE = { 1325 .key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01 1326 }; 1327 1328 /* Command aborted, Overlapped Commands Attempted */ 1329 const struct SCSISense sense_code_OVERLAPPED_COMMANDS = { 1330 .key = ABORTED_COMMAND, .asc = 0x4e, .ascq = 0x00 1331 }; 1332 1333 /* Unit attention, Capacity data has changed */ 1334 const struct SCSISense sense_code_CAPACITY_CHANGED = { 1335 .key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09 1336 }; 1337 1338 /* Unit attention, Power on, reset or bus device reset occurred */ 1339 const struct SCSISense sense_code_RESET = { 1340 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00 1341 }; 1342 1343 /* Unit attention, No medium */ 1344 const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = { 1345 .key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00 1346 }; 1347 1348 /* Unit attention, Medium may have changed */ 1349 const struct SCSISense sense_code_MEDIUM_CHANGED = { 1350 .key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00 1351 }; 1352 1353 /* Unit attention, Reported LUNs data has changed */ 1354 const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = { 1355 .key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e 1356 }; 1357 1358 /* Unit attention, Device internal reset */ 1359 const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = { 1360 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04 1361 }; 1362 1363 /* Data Protection, Write Protected */ 1364 const struct SCSISense sense_code_WRITE_PROTECTED = { 1365 .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00 1366 }; 1367 1368 /* 1369 * scsi_build_sense 1370 * 1371 * Convert between fixed and descriptor sense buffers 1372 */ 1373 int scsi_build_sense(uint8_t *in_buf, int in_len, 1374 uint8_t *buf, int len, bool fixed) 1375 { 1376 bool fixed_in; 1377 SCSISense sense; 1378 if (!fixed && len < 8) { 1379 return 0; 1380 } 1381 1382 if (in_len == 0) { 1383 sense.key = NO_SENSE; 1384 sense.asc = 0; 1385 sense.ascq = 0; 1386 } else { 1387 fixed_in = (in_buf[0] & 2) == 0; 1388 1389 if (fixed == fixed_in) { 1390 memcpy(buf, in_buf, MIN(len, in_len)); 1391 return MIN(len, in_len); 1392 } 1393 1394 if (fixed_in) { 1395 sense.key = in_buf[2]; 1396 sense.asc = in_buf[12]; 1397 sense.ascq = in_buf[13]; 1398 } else { 1399 sense.key = in_buf[1]; 1400 sense.asc = in_buf[2]; 1401 sense.ascq = in_buf[3]; 1402 } 1403 } 1404 1405 memset(buf, 0, len); 1406 if (fixed) { 1407 /* Return fixed format sense buffer */ 1408 buf[0] = 0x70; 1409 buf[2] = sense.key; 1410 buf[7] = 10; 1411 buf[12] = sense.asc; 1412 buf[13] = sense.ascq; 1413 return MIN(len, SCSI_SENSE_LEN); 1414 } else { 1415 /* Return descriptor format sense buffer */ 1416 buf[0] = 0x72; 1417 buf[1] = sense.key; 1418 buf[2] = sense.asc; 1419 buf[3] = sense.ascq; 1420 return 8; 1421 } 1422 } 1423 1424 static const char *scsi_command_name(uint8_t cmd) 1425 { 1426 static const char *names[] = { 1427 [ TEST_UNIT_READY ] = "TEST_UNIT_READY", 1428 [ REWIND ] = "REWIND", 1429 [ REQUEST_SENSE ] = "REQUEST_SENSE", 1430 [ FORMAT_UNIT ] = "FORMAT_UNIT", 1431 [ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS", 1432 [ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS", 1433 /* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */ 1434 [ READ_6 ] = "READ_6", 1435 [ WRITE_6 ] = "WRITE_6", 1436 [ SET_CAPACITY ] = "SET_CAPACITY", 1437 [ READ_REVERSE ] = "READ_REVERSE", 1438 [ WRITE_FILEMARKS ] = "WRITE_FILEMARKS", 1439 [ SPACE ] = "SPACE", 1440 [ INQUIRY ] = "INQUIRY", 1441 [ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA", 1442 [ MAINTENANCE_IN ] = "MAINTENANCE_IN", 1443 [ MAINTENANCE_OUT ] = "MAINTENANCE_OUT", 1444 [ MODE_SELECT ] = "MODE_SELECT", 1445 [ RESERVE ] = "RESERVE", 1446 [ RELEASE ] = "RELEASE", 1447 [ COPY ] = "COPY", 1448 [ ERASE ] = "ERASE", 1449 [ MODE_SENSE ] = "MODE_SENSE", 1450 [ START_STOP ] = "START_STOP/LOAD_UNLOAD", 1451 /* LOAD_UNLOAD and START_STOP use the same operation code */ 1452 [ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC", 1453 [ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC", 1454 [ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL", 1455 [ READ_CAPACITY_10 ] = "READ_CAPACITY_10", 1456 [ READ_10 ] = "READ_10", 1457 [ WRITE_10 ] = "WRITE_10", 1458 [ SEEK_10 ] = "SEEK_10/POSITION_TO_ELEMENT", 1459 /* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */ 1460 [ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10", 1461 [ VERIFY_10 ] = "VERIFY_10", 1462 [ SEARCH_HIGH ] = "SEARCH_HIGH", 1463 [ SEARCH_EQUAL ] = "SEARCH_EQUAL", 1464 [ SEARCH_LOW ] = "SEARCH_LOW", 1465 [ SET_LIMITS ] = "SET_LIMITS", 1466 [ PRE_FETCH ] = "PRE_FETCH/READ_POSITION", 1467 /* READ_POSITION and PRE_FETCH use the same operation code */ 1468 [ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE", 1469 [ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE", 1470 [ READ_DEFECT_DATA ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE", 1471 /* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */ 1472 [ MEDIUM_SCAN ] = "MEDIUM_SCAN", 1473 [ COMPARE ] = "COMPARE", 1474 [ COPY_VERIFY ] = "COPY_VERIFY", 1475 [ WRITE_BUFFER ] = "WRITE_BUFFER", 1476 [ READ_BUFFER ] = "READ_BUFFER", 1477 [ UPDATE_BLOCK ] = "UPDATE_BLOCK", 1478 [ READ_LONG_10 ] = "READ_LONG_10", 1479 [ WRITE_LONG_10 ] = "WRITE_LONG_10", 1480 [ CHANGE_DEFINITION ] = "CHANGE_DEFINITION", 1481 [ WRITE_SAME_10 ] = "WRITE_SAME_10", 1482 [ UNMAP ] = "UNMAP", 1483 [ READ_TOC ] = "READ_TOC", 1484 [ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT", 1485 [ SANITIZE ] = "SANITIZE", 1486 [ GET_CONFIGURATION ] = "GET_CONFIGURATION", 1487 [ LOG_SELECT ] = "LOG_SELECT", 1488 [ LOG_SENSE ] = "LOG_SENSE", 1489 [ MODE_SELECT_10 ] = "MODE_SELECT_10", 1490 [ RESERVE_10 ] = "RESERVE_10", 1491 [ RELEASE_10 ] = "RELEASE_10", 1492 [ MODE_SENSE_10 ] = "MODE_SENSE_10", 1493 [ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN", 1494 [ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT", 1495 [ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16", 1496 [ EXTENDED_COPY ] = "EXTENDED_COPY", 1497 [ ATA_PASSTHROUGH_16 ] = "ATA_PASSTHROUGH_16", 1498 [ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN", 1499 [ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT", 1500 [ READ_16 ] = "READ_16", 1501 [ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE", 1502 [ WRITE_16 ] = "WRITE_16", 1503 [ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16", 1504 [ VERIFY_16 ] = "VERIFY_16", 1505 [ PRE_FETCH_16 ] = "PRE_FETCH_16", 1506 [ SYNCHRONIZE_CACHE_16 ] = "SPACE_16/SYNCHRONIZE_CACHE_16", 1507 /* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */ 1508 [ LOCATE_16 ] = "LOCATE_16", 1509 [ WRITE_SAME_16 ] = "ERASE_16/WRITE_SAME_16", 1510 /* ERASE_16 and WRITE_SAME_16 use the same operation code */ 1511 [ SERVICE_ACTION_IN_16 ] = "SERVICE_ACTION_IN_16", 1512 [ WRITE_LONG_16 ] = "WRITE_LONG_16", 1513 [ REPORT_LUNS ] = "REPORT_LUNS", 1514 [ ATA_PASSTHROUGH_12 ] = "BLANK/ATA_PASSTHROUGH_12", 1515 [ MOVE_MEDIUM ] = "MOVE_MEDIUM", 1516 [ EXCHANGE_MEDIUM ] = "EXCHANGE MEDIUM", 1517 [ READ_12 ] = "READ_12", 1518 [ WRITE_12 ] = "WRITE_12", 1519 [ ERASE_12 ] = "ERASE_12/GET_PERFORMANCE", 1520 /* ERASE_12 and GET_PERFORMANCE use the same operation code */ 1521 [ SERVICE_ACTION_IN_12 ] = "SERVICE_ACTION_IN_12", 1522 [ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12", 1523 [ VERIFY_12 ] = "VERIFY_12", 1524 [ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12", 1525 [ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12", 1526 [ SEARCH_LOW_12 ] = "SEARCH_LOW_12", 1527 [ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS", 1528 [ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG/SET_STREAMING", 1529 /* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */ 1530 [ READ_CD ] = "READ_CD", 1531 [ READ_DEFECT_DATA_12 ] = "READ_DEFECT_DATA_12", 1532 [ READ_DVD_STRUCTURE ] = "READ_DVD_STRUCTURE", 1533 [ RESERVE_TRACK ] = "RESERVE_TRACK", 1534 [ SEND_CUE_SHEET ] = "SEND_CUE_SHEET", 1535 [ SEND_DVD_STRUCTURE ] = "SEND_DVD_STRUCTURE", 1536 [ SET_CD_SPEED ] = "SET_CD_SPEED", 1537 [ SET_READ_AHEAD ] = "SET_READ_AHEAD", 1538 [ ALLOW_OVERWRITE ] = "ALLOW_OVERWRITE", 1539 [ MECHANISM_STATUS ] = "MECHANISM_STATUS", 1540 }; 1541 1542 if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL) 1543 return "*UNKNOWN*"; 1544 return names[cmd]; 1545 } 1546 1547 SCSIRequest *scsi_req_ref(SCSIRequest *req) 1548 { 1549 assert(req->refcount > 0); 1550 req->refcount++; 1551 return req; 1552 } 1553 1554 void scsi_req_unref(SCSIRequest *req) 1555 { 1556 assert(req->refcount > 0); 1557 if (--req->refcount == 0) { 1558 BusState *qbus = req->dev->qdev.parent_bus; 1559 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, qbus); 1560 1561 if (bus->info->free_request && req->hba_private) { 1562 bus->info->free_request(bus, req->hba_private); 1563 } 1564 if (req->ops->free_req) { 1565 req->ops->free_req(req); 1566 } 1567 object_unref(OBJECT(req->dev)); 1568 object_unref(OBJECT(qbus->parent)); 1569 g_free(req); 1570 } 1571 } 1572 1573 /* Tell the device that we finished processing this chunk of I/O. It 1574 will start the next chunk or complete the command. */ 1575 void scsi_req_continue(SCSIRequest *req) 1576 { 1577 if (req->io_canceled) { 1578 trace_scsi_req_continue_canceled(req->dev->id, req->lun, req->tag); 1579 return; 1580 } 1581 trace_scsi_req_continue(req->dev->id, req->lun, req->tag); 1582 if (req->cmd.mode == SCSI_XFER_TO_DEV) { 1583 req->ops->write_data(req); 1584 } else { 1585 req->ops->read_data(req); 1586 } 1587 } 1588 1589 /* Called by the devices when data is ready for the HBA. The HBA should 1590 start a DMA operation to read or fill the device's data buffer. 1591 Once it completes, calling scsi_req_continue will restart I/O. */ 1592 void scsi_req_data(SCSIRequest *req, int len) 1593 { 1594 uint8_t *buf; 1595 if (req->io_canceled) { 1596 trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len); 1597 return; 1598 } 1599 trace_scsi_req_data(req->dev->id, req->lun, req->tag, len); 1600 assert(req->cmd.mode != SCSI_XFER_NONE); 1601 if (!req->sg) { 1602 req->resid -= len; 1603 req->bus->info->transfer_data(req, len); 1604 return; 1605 } 1606 1607 /* If the device calls scsi_req_data and the HBA specified a 1608 * scatter/gather list, the transfer has to happen in a single 1609 * step. */ 1610 assert(!req->dma_started); 1611 req->dma_started = true; 1612 1613 buf = scsi_req_get_buf(req); 1614 if (req->cmd.mode == SCSI_XFER_FROM_DEV) { 1615 req->resid = dma_buf_read(buf, len, req->sg); 1616 } else { 1617 req->resid = dma_buf_write(buf, len, req->sg); 1618 } 1619 scsi_req_continue(req); 1620 } 1621 1622 void scsi_req_print(SCSIRequest *req) 1623 { 1624 FILE *fp = stderr; 1625 int i; 1626 1627 fprintf(fp, "[%s id=%d] %s", 1628 req->dev->qdev.parent_bus->name, 1629 req->dev->id, 1630 scsi_command_name(req->cmd.buf[0])); 1631 for (i = 1; i < req->cmd.len; i++) { 1632 fprintf(fp, " 0x%02x", req->cmd.buf[i]); 1633 } 1634 switch (req->cmd.mode) { 1635 case SCSI_XFER_NONE: 1636 fprintf(fp, " - none\n"); 1637 break; 1638 case SCSI_XFER_FROM_DEV: 1639 fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer); 1640 break; 1641 case SCSI_XFER_TO_DEV: 1642 fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer); 1643 break; 1644 default: 1645 fprintf(fp, " - Oops\n"); 1646 break; 1647 } 1648 } 1649 1650 void scsi_req_complete(SCSIRequest *req, int status) 1651 { 1652 assert(req->status == -1); 1653 req->status = status; 1654 1655 assert(req->sense_len <= sizeof(req->sense)); 1656 if (status == GOOD) { 1657 req->sense_len = 0; 1658 } 1659 1660 if (req->sense_len) { 1661 memcpy(req->dev->sense, req->sense, req->sense_len); 1662 req->dev->sense_len = req->sense_len; 1663 req->dev->sense_is_ua = (req->ops == &reqops_unit_attention); 1664 } else { 1665 req->dev->sense_len = 0; 1666 req->dev->sense_is_ua = false; 1667 } 1668 1669 /* 1670 * Unit attention state is now stored in the device's sense buffer 1671 * if the HBA didn't do autosense. Clear the pending unit attention 1672 * flags. 1673 */ 1674 scsi_clear_unit_attention(req); 1675 1676 scsi_req_ref(req); 1677 scsi_req_dequeue(req); 1678 req->bus->info->complete(req, req->status, req->resid); 1679 scsi_req_unref(req); 1680 } 1681 1682 void scsi_req_cancel(SCSIRequest *req) 1683 { 1684 trace_scsi_req_cancel(req->dev->id, req->lun, req->tag); 1685 if (!req->enqueued) { 1686 return; 1687 } 1688 scsi_req_ref(req); 1689 scsi_req_dequeue(req); 1690 req->io_canceled = true; 1691 if (req->ops->cancel_io) { 1692 req->ops->cancel_io(req); 1693 } 1694 if (req->bus->info->cancel) { 1695 req->bus->info->cancel(req); 1696 } 1697 scsi_req_unref(req); 1698 } 1699 1700 void scsi_req_abort(SCSIRequest *req, int status) 1701 { 1702 if (!req->enqueued) { 1703 return; 1704 } 1705 scsi_req_ref(req); 1706 scsi_req_dequeue(req); 1707 req->io_canceled = true; 1708 if (req->ops->cancel_io) { 1709 req->ops->cancel_io(req); 1710 } 1711 scsi_req_complete(req, status); 1712 scsi_req_unref(req); 1713 } 1714 1715 static int scsi_ua_precedence(SCSISense sense) 1716 { 1717 if (sense.key != UNIT_ATTENTION) { 1718 return INT_MAX; 1719 } 1720 if (sense.asc == 0x29 && sense.ascq == 0x04) { 1721 /* DEVICE INTERNAL RESET goes with POWER ON OCCURRED */ 1722 return 1; 1723 } else if (sense.asc == 0x3F && sense.ascq == 0x01) { 1724 /* MICROCODE HAS BEEN CHANGED goes with SCSI BUS RESET OCCURRED */ 1725 return 2; 1726 } else if (sense.asc == 0x29 && (sense.ascq == 0x05 || sense.ascq == 0x06)) { 1727 /* These two go with "all others". */ 1728 ; 1729 } else if (sense.asc == 0x29 && sense.ascq <= 0x07) { 1730 /* POWER ON, RESET OR BUS DEVICE RESET OCCURRED = 0 1731 * POWER ON OCCURRED = 1 1732 * SCSI BUS RESET OCCURRED = 2 1733 * BUS DEVICE RESET FUNCTION OCCURRED = 3 1734 * I_T NEXUS LOSS OCCURRED = 7 1735 */ 1736 return sense.ascq; 1737 } else if (sense.asc == 0x2F && sense.ascq == 0x01) { 1738 /* COMMANDS CLEARED BY POWER LOSS NOTIFICATION */ 1739 return 8; 1740 } 1741 return (sense.asc << 8) | sense.ascq; 1742 } 1743 1744 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense) 1745 { 1746 int prec1, prec2; 1747 if (sense.key != UNIT_ATTENTION) { 1748 return; 1749 } 1750 trace_scsi_device_set_ua(sdev->id, sdev->lun, sense.key, 1751 sense.asc, sense.ascq); 1752 1753 /* 1754 * Override a pre-existing unit attention condition, except for a more 1755 * important reset condition. 1756 */ 1757 prec1 = scsi_ua_precedence(sdev->unit_attention); 1758 prec2 = scsi_ua_precedence(sense); 1759 if (prec2 < prec1) { 1760 sdev->unit_attention = sense; 1761 } 1762 } 1763 1764 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense) 1765 { 1766 SCSIRequest *req; 1767 1768 while (!QTAILQ_EMPTY(&sdev->requests)) { 1769 req = QTAILQ_FIRST(&sdev->requests); 1770 scsi_req_cancel(req); 1771 } 1772 1773 scsi_device_set_ua(sdev, sense); 1774 } 1775 1776 static char *scsibus_get_dev_path(DeviceState *dev) 1777 { 1778 SCSIDevice *d = DO_UPCAST(SCSIDevice, qdev, dev); 1779 DeviceState *hba = dev->parent_bus->parent; 1780 char *id; 1781 char *path; 1782 1783 id = qdev_get_dev_path(hba); 1784 if (id) { 1785 path = g_strdup_printf("%s/%d:%d:%d", id, d->channel, d->id, d->lun); 1786 } else { 1787 path = g_strdup_printf("%d:%d:%d", d->channel, d->id, d->lun); 1788 } 1789 g_free(id); 1790 return path; 1791 } 1792 1793 static char *scsibus_get_fw_dev_path(DeviceState *dev) 1794 { 1795 SCSIDevice *d = SCSI_DEVICE(dev); 1796 return g_strdup_printf("channel@%x/%s@%x,%x", d->channel, 1797 qdev_fw_name(dev), d->id, d->lun); 1798 } 1799 1800 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun) 1801 { 1802 BusChild *kid; 1803 SCSIDevice *target_dev = NULL; 1804 1805 QTAILQ_FOREACH_REVERSE(kid, &bus->qbus.children, ChildrenHead, sibling) { 1806 DeviceState *qdev = kid->child; 1807 SCSIDevice *dev = SCSI_DEVICE(qdev); 1808 1809 if (dev->channel == channel && dev->id == id) { 1810 if (dev->lun == lun) { 1811 return dev; 1812 } 1813 target_dev = dev; 1814 } 1815 } 1816 return target_dev; 1817 } 1818 1819 /* SCSI request list. For simplicity, pv points to the whole device */ 1820 1821 static void put_scsi_requests(QEMUFile *f, void *pv, size_t size) 1822 { 1823 SCSIDevice *s = pv; 1824 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); 1825 SCSIRequest *req; 1826 1827 QTAILQ_FOREACH(req, &s->requests, next) { 1828 assert(!req->io_canceled); 1829 assert(req->status == -1); 1830 assert(req->enqueued); 1831 1832 qemu_put_sbyte(f, req->retry ? 1 : 2); 1833 qemu_put_buffer(f, req->cmd.buf, sizeof(req->cmd.buf)); 1834 qemu_put_be32s(f, &req->tag); 1835 qemu_put_be32s(f, &req->lun); 1836 if (bus->info->save_request) { 1837 bus->info->save_request(f, req); 1838 } 1839 if (req->ops->save_request) { 1840 req->ops->save_request(f, req); 1841 } 1842 } 1843 qemu_put_sbyte(f, 0); 1844 } 1845 1846 static int get_scsi_requests(QEMUFile *f, void *pv, size_t size) 1847 { 1848 SCSIDevice *s = pv; 1849 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); 1850 int8_t sbyte; 1851 1852 while ((sbyte = qemu_get_sbyte(f)) > 0) { 1853 uint8_t buf[SCSI_CMD_BUF_SIZE]; 1854 uint32_t tag; 1855 uint32_t lun; 1856 SCSIRequest *req; 1857 1858 qemu_get_buffer(f, buf, sizeof(buf)); 1859 qemu_get_be32s(f, &tag); 1860 qemu_get_be32s(f, &lun); 1861 req = scsi_req_new(s, tag, lun, buf, NULL); 1862 req->retry = (sbyte == 1); 1863 if (bus->info->load_request) { 1864 req->hba_private = bus->info->load_request(f, req); 1865 } 1866 if (req->ops->load_request) { 1867 req->ops->load_request(f, req); 1868 } 1869 1870 /* Just restart it later. */ 1871 scsi_req_enqueue_internal(req); 1872 1873 /* At this point, the request will be kept alive by the reference 1874 * added by scsi_req_enqueue_internal, so we can release our reference. 1875 * The HBA of course will add its own reference in the load_request 1876 * callback if it needs to hold on the SCSIRequest. 1877 */ 1878 scsi_req_unref(req); 1879 } 1880 1881 return 0; 1882 } 1883 1884 static int scsi_qdev_unplug(DeviceState *qdev) 1885 { 1886 SCSIDevice *dev = SCSI_DEVICE(qdev); 1887 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); 1888 1889 if (bus->info->hot_unplug) { 1890 bus->info->hot_unplug(bus, dev); 1891 } 1892 return qdev_simple_unplug_cb(qdev); 1893 } 1894 1895 static const VMStateInfo vmstate_info_scsi_requests = { 1896 .name = "scsi-requests", 1897 .get = get_scsi_requests, 1898 .put = put_scsi_requests, 1899 }; 1900 1901 const VMStateDescription vmstate_scsi_device = { 1902 .name = "SCSIDevice", 1903 .version_id = 1, 1904 .minimum_version_id = 1, 1905 .minimum_version_id_old = 1, 1906 .fields = (VMStateField[]) { 1907 VMSTATE_UINT8(unit_attention.key, SCSIDevice), 1908 VMSTATE_UINT8(unit_attention.asc, SCSIDevice), 1909 VMSTATE_UINT8(unit_attention.ascq, SCSIDevice), 1910 VMSTATE_BOOL(sense_is_ua, SCSIDevice), 1911 VMSTATE_UINT8_ARRAY(sense, SCSIDevice, SCSI_SENSE_BUF_SIZE), 1912 VMSTATE_UINT32(sense_len, SCSIDevice), 1913 { 1914 .name = "requests", 1915 .version_id = 0, 1916 .field_exists = NULL, 1917 .size = 0, /* ouch */ 1918 .info = &vmstate_info_scsi_requests, 1919 .flags = VMS_SINGLE, 1920 .offset = 0, 1921 }, 1922 VMSTATE_END_OF_LIST() 1923 } 1924 }; 1925 1926 static void scsi_device_class_init(ObjectClass *klass, void *data) 1927 { 1928 DeviceClass *k = DEVICE_CLASS(klass); 1929 set_bit(DEVICE_CATEGORY_STORAGE, k->categories); 1930 k->bus_type = TYPE_SCSI_BUS; 1931 k->init = scsi_qdev_init; 1932 k->unplug = scsi_qdev_unplug; 1933 k->exit = scsi_qdev_exit; 1934 k->props = scsi_props; 1935 } 1936 1937 static const TypeInfo scsi_device_type_info = { 1938 .name = TYPE_SCSI_DEVICE, 1939 .parent = TYPE_DEVICE, 1940 .instance_size = sizeof(SCSIDevice), 1941 .abstract = true, 1942 .class_size = sizeof(SCSIDeviceClass), 1943 .class_init = scsi_device_class_init, 1944 }; 1945 1946 static void scsi_register_types(void) 1947 { 1948 type_register_static(&scsi_bus_info); 1949 type_register_static(&scsi_device_type_info); 1950 } 1951 1952 type_init(scsi_register_types) 1953