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 scsi_req_dequeue(req); 105 scsi_req_enqueue(req); 106 break; 107 } 108 } 109 scsi_req_unref(req); 110 } 111 } 112 113 void scsi_req_retry(SCSIRequest *req) 114 { 115 /* No need to save a reference, because scsi_dma_restart_bh just 116 * looks at the request list. */ 117 req->retry = true; 118 } 119 120 static void scsi_dma_restart_cb(void *opaque, int running, RunState state) 121 { 122 SCSIDevice *s = opaque; 123 124 if (!running) { 125 return; 126 } 127 if (!s->bh) { 128 s->bh = qemu_bh_new(scsi_dma_restart_bh, s); 129 qemu_bh_schedule(s->bh); 130 } 131 } 132 133 static int scsi_qdev_init(DeviceState *qdev) 134 { 135 SCSIDevice *dev = SCSI_DEVICE(qdev); 136 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); 137 SCSIDevice *d; 138 int rc = -1; 139 140 if (dev->channel > bus->info->max_channel) { 141 error_report("bad scsi channel id: %d", dev->channel); 142 goto err; 143 } 144 if (dev->id != -1 && dev->id > bus->info->max_target) { 145 error_report("bad scsi device id: %d", dev->id); 146 goto err; 147 } 148 if (dev->lun != -1 && dev->lun > bus->info->max_lun) { 149 error_report("bad scsi device lun: %d", dev->lun); 150 goto err; 151 } 152 153 if (dev->id == -1) { 154 int id = -1; 155 if (dev->lun == -1) { 156 dev->lun = 0; 157 } 158 do { 159 d = scsi_device_find(bus, dev->channel, ++id, dev->lun); 160 } while (d && d->lun == dev->lun && id < bus->info->max_target); 161 if (d && d->lun == dev->lun) { 162 error_report("no free target"); 163 goto err; 164 } 165 dev->id = id; 166 } else if (dev->lun == -1) { 167 int lun = -1; 168 do { 169 d = scsi_device_find(bus, dev->channel, dev->id, ++lun); 170 } while (d && d->lun == lun && lun < bus->info->max_lun); 171 if (d && d->lun == lun) { 172 error_report("no free lun"); 173 goto err; 174 } 175 dev->lun = lun; 176 } else { 177 d = scsi_device_find(bus, dev->channel, dev->id, dev->lun); 178 assert(d); 179 if (d->lun == dev->lun && dev != d) { 180 error_report("lun already used by '%s'", d->qdev.id); 181 goto err; 182 } 183 } 184 185 QTAILQ_INIT(&dev->requests); 186 rc = scsi_device_init(dev); 187 if (rc == 0) { 188 dev->vmsentry = qemu_add_vm_change_state_handler(scsi_dma_restart_cb, 189 dev); 190 } 191 192 if (bus->info->hotplug) { 193 bus->info->hotplug(bus, dev); 194 } 195 196 err: 197 return rc; 198 } 199 200 static int scsi_qdev_exit(DeviceState *qdev) 201 { 202 SCSIDevice *dev = SCSI_DEVICE(qdev); 203 204 if (dev->vmsentry) { 205 qemu_del_vm_change_state_handler(dev->vmsentry); 206 } 207 scsi_device_destroy(dev); 208 return 0; 209 } 210 211 /* handle legacy '-drive if=scsi,...' cmd line args */ 212 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv, 213 int unit, bool removable, int bootindex, 214 const char *serial, Error **errp) 215 { 216 const char *driver; 217 DeviceState *dev; 218 Error *err = NULL; 219 220 driver = bdrv_is_sg(bdrv) ? "scsi-generic" : "scsi-disk"; 221 dev = qdev_create(&bus->qbus, driver); 222 qdev_prop_set_uint32(dev, "scsi-id", unit); 223 if (bootindex >= 0) { 224 qdev_prop_set_int32(dev, "bootindex", bootindex); 225 } 226 if (object_property_find(OBJECT(dev), "removable", NULL)) { 227 qdev_prop_set_bit(dev, "removable", removable); 228 } 229 if (serial && object_property_find(OBJECT(dev), "serial", NULL)) { 230 qdev_prop_set_string(dev, "serial", serial); 231 } 232 if (qdev_prop_set_drive(dev, "drive", bdrv) < 0) { 233 error_setg(errp, "Setting drive property failed"); 234 object_unparent(OBJECT(dev)); 235 return NULL; 236 } 237 object_property_set_bool(OBJECT(dev), true, "realized", &err); 238 if (err != NULL) { 239 error_propagate(errp, err); 240 object_unparent(OBJECT(dev)); 241 return NULL; 242 } 243 return SCSI_DEVICE(dev); 244 } 245 246 void scsi_bus_legacy_handle_cmdline(SCSIBus *bus, Error **errp) 247 { 248 Location loc; 249 DriveInfo *dinfo; 250 int unit; 251 Error *err = NULL; 252 253 loc_push_none(&loc); 254 for (unit = 0; unit <= bus->info->max_target; unit++) { 255 dinfo = drive_get(IF_SCSI, bus->busnr, unit); 256 if (dinfo == NULL) { 257 continue; 258 } 259 qemu_opts_loc_restore(dinfo->opts); 260 scsi_bus_legacy_add_drive(bus, dinfo->bdrv, unit, false, -1, NULL, 261 &err); 262 if (err != NULL) { 263 error_propagate(errp, err); 264 break; 265 } 266 } 267 loc_pop(&loc); 268 } 269 270 static int32_t scsi_invalid_field(SCSIRequest *req, uint8_t *buf) 271 { 272 scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD)); 273 scsi_req_complete(req, CHECK_CONDITION); 274 return 0; 275 } 276 277 static const struct SCSIReqOps reqops_invalid_field = { 278 .size = sizeof(SCSIRequest), 279 .send_command = scsi_invalid_field 280 }; 281 282 /* SCSIReqOps implementation for invalid commands. */ 283 284 static int32_t scsi_invalid_command(SCSIRequest *req, uint8_t *buf) 285 { 286 scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE)); 287 scsi_req_complete(req, CHECK_CONDITION); 288 return 0; 289 } 290 291 static const struct SCSIReqOps reqops_invalid_opcode = { 292 .size = sizeof(SCSIRequest), 293 .send_command = scsi_invalid_command 294 }; 295 296 /* SCSIReqOps implementation for unit attention conditions. */ 297 298 static int32_t scsi_unit_attention(SCSIRequest *req, uint8_t *buf) 299 { 300 if (req->dev->unit_attention.key == UNIT_ATTENTION) { 301 scsi_req_build_sense(req, req->dev->unit_attention); 302 } else if (req->bus->unit_attention.key == UNIT_ATTENTION) { 303 scsi_req_build_sense(req, req->bus->unit_attention); 304 } 305 scsi_req_complete(req, CHECK_CONDITION); 306 return 0; 307 } 308 309 static const struct SCSIReqOps reqops_unit_attention = { 310 .size = sizeof(SCSIRequest), 311 .send_command = scsi_unit_attention 312 }; 313 314 /* SCSIReqOps implementation for REPORT LUNS and for commands sent to 315 an invalid LUN. */ 316 317 typedef struct SCSITargetReq SCSITargetReq; 318 319 struct SCSITargetReq { 320 SCSIRequest req; 321 int len; 322 uint8_t *buf; 323 int buf_len; 324 }; 325 326 static void store_lun(uint8_t *outbuf, int lun) 327 { 328 if (lun < 256) { 329 outbuf[1] = lun; 330 return; 331 } 332 outbuf[1] = (lun & 255); 333 outbuf[0] = (lun >> 8) | 0x40; 334 } 335 336 static bool scsi_target_emulate_report_luns(SCSITargetReq *r) 337 { 338 BusChild *kid; 339 int i, len, n; 340 int channel, id; 341 bool found_lun0; 342 343 if (r->req.cmd.xfer < 16) { 344 return false; 345 } 346 if (r->req.cmd.buf[2] > 2) { 347 return false; 348 } 349 channel = r->req.dev->channel; 350 id = r->req.dev->id; 351 found_lun0 = false; 352 n = 0; 353 QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) { 354 DeviceState *qdev = kid->child; 355 SCSIDevice *dev = SCSI_DEVICE(qdev); 356 357 if (dev->channel == channel && dev->id == id) { 358 if (dev->lun == 0) { 359 found_lun0 = true; 360 } 361 n += 8; 362 } 363 } 364 if (!found_lun0) { 365 n += 8; 366 } 367 368 scsi_target_alloc_buf(&r->req, n + 8); 369 370 len = MIN(n + 8, r->req.cmd.xfer & ~7); 371 memset(r->buf, 0, len); 372 stl_be_p(&r->buf[0], n); 373 i = found_lun0 ? 8 : 16; 374 QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) { 375 DeviceState *qdev = kid->child; 376 SCSIDevice *dev = SCSI_DEVICE(qdev); 377 378 if (dev->channel == channel && dev->id == id) { 379 store_lun(&r->buf[i], dev->lun); 380 i += 8; 381 } 382 } 383 assert(i == n + 8); 384 r->len = len; 385 return true; 386 } 387 388 static bool scsi_target_emulate_inquiry(SCSITargetReq *r) 389 { 390 assert(r->req.dev->lun != r->req.lun); 391 392 scsi_target_alloc_buf(&r->req, SCSI_INQUIRY_LEN); 393 394 if (r->req.cmd.buf[1] & 0x2) { 395 /* Command support data - optional, not implemented */ 396 return false; 397 } 398 399 if (r->req.cmd.buf[1] & 0x1) { 400 /* Vital product data */ 401 uint8_t page_code = r->req.cmd.buf[2]; 402 r->buf[r->len++] = page_code ; /* this page */ 403 r->buf[r->len++] = 0x00; 404 405 switch (page_code) { 406 case 0x00: /* Supported page codes, mandatory */ 407 { 408 int pages; 409 pages = r->len++; 410 r->buf[r->len++] = 0x00; /* list of supported pages (this page) */ 411 r->buf[pages] = r->len - pages - 1; /* number of pages */ 412 break; 413 } 414 default: 415 return false; 416 } 417 /* done with EVPD */ 418 assert(r->len < r->buf_len); 419 r->len = MIN(r->req.cmd.xfer, r->len); 420 return true; 421 } 422 423 /* Standard INQUIRY data */ 424 if (r->req.cmd.buf[2] != 0) { 425 return false; 426 } 427 428 /* PAGE CODE == 0 */ 429 r->len = MIN(r->req.cmd.xfer, SCSI_INQUIRY_LEN); 430 memset(r->buf, 0, r->len); 431 if (r->req.lun != 0) { 432 r->buf[0] = TYPE_NO_LUN; 433 } else { 434 r->buf[0] = TYPE_NOT_PRESENT | TYPE_INACTIVE; 435 r->buf[2] = 5; /* Version */ 436 r->buf[3] = 2 | 0x10; /* HiSup, response data format */ 437 r->buf[4] = r->len - 5; /* Additional Length = (Len - 1) - 4 */ 438 r->buf[7] = 0x10 | (r->req.bus->info->tcq ? 0x02 : 0); /* Sync, TCQ. */ 439 memcpy(&r->buf[8], "QEMU ", 8); 440 memcpy(&r->buf[16], "QEMU TARGET ", 16); 441 pstrcpy((char *) &r->buf[32], 4, qemu_get_version()); 442 } 443 return true; 444 } 445 446 static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf) 447 { 448 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 449 450 switch (buf[0]) { 451 case REPORT_LUNS: 452 if (!scsi_target_emulate_report_luns(r)) { 453 goto illegal_request; 454 } 455 break; 456 case INQUIRY: 457 if (!scsi_target_emulate_inquiry(r)) { 458 goto illegal_request; 459 } 460 break; 461 case REQUEST_SENSE: 462 scsi_target_alloc_buf(&r->req, SCSI_SENSE_LEN); 463 r->len = scsi_device_get_sense(r->req.dev, r->buf, 464 MIN(req->cmd.xfer, r->buf_len), 465 (req->cmd.buf[1] & 1) == 0); 466 if (r->req.dev->sense_is_ua) { 467 scsi_device_unit_attention_reported(req->dev); 468 r->req.dev->sense_len = 0; 469 r->req.dev->sense_is_ua = false; 470 } 471 break; 472 case TEST_UNIT_READY: 473 break; 474 default: 475 scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED)); 476 scsi_req_complete(req, CHECK_CONDITION); 477 return 0; 478 illegal_request: 479 scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD)); 480 scsi_req_complete(req, CHECK_CONDITION); 481 return 0; 482 } 483 484 if (!r->len) { 485 scsi_req_complete(req, GOOD); 486 } 487 return r->len; 488 } 489 490 static void scsi_target_read_data(SCSIRequest *req) 491 { 492 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 493 uint32_t n; 494 495 n = r->len; 496 if (n > 0) { 497 r->len = 0; 498 scsi_req_data(&r->req, n); 499 } else { 500 scsi_req_complete(&r->req, GOOD); 501 } 502 } 503 504 static uint8_t *scsi_target_get_buf(SCSIRequest *req) 505 { 506 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 507 508 return r->buf; 509 } 510 511 static uint8_t *scsi_target_alloc_buf(SCSIRequest *req, size_t len) 512 { 513 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 514 515 r->buf = g_malloc(len); 516 r->buf_len = len; 517 518 return r->buf; 519 } 520 521 static void scsi_target_free_buf(SCSIRequest *req) 522 { 523 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 524 525 g_free(r->buf); 526 } 527 528 static const struct SCSIReqOps reqops_target_command = { 529 .size = sizeof(SCSITargetReq), 530 .send_command = scsi_target_send_command, 531 .read_data = scsi_target_read_data, 532 .get_buf = scsi_target_get_buf, 533 .free_req = scsi_target_free_buf, 534 }; 535 536 537 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d, 538 uint32_t tag, uint32_t lun, void *hba_private) 539 { 540 SCSIRequest *req; 541 SCSIBus *bus = scsi_bus_from_device(d); 542 BusState *qbus = BUS(bus); 543 544 req = g_malloc0(reqops->size); 545 req->refcount = 1; 546 req->bus = bus; 547 req->dev = d; 548 req->tag = tag; 549 req->lun = lun; 550 req->hba_private = hba_private; 551 req->status = -1; 552 req->sense_len = 0; 553 req->ops = reqops; 554 object_ref(OBJECT(d)); 555 object_ref(OBJECT(qbus->parent)); 556 trace_scsi_req_alloc(req->dev->id, req->lun, req->tag); 557 return req; 558 } 559 560 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun, 561 uint8_t *buf, void *hba_private) 562 { 563 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus); 564 SCSIRequest *req; 565 SCSICommand cmd; 566 567 if (scsi_req_parse(&cmd, d, buf) != 0) { 568 trace_scsi_req_parse_bad(d->id, lun, tag, buf[0]); 569 req = scsi_req_alloc(&reqops_invalid_opcode, d, tag, lun, hba_private); 570 } else { 571 trace_scsi_req_parsed(d->id, lun, tag, buf[0], 572 cmd.mode, cmd.xfer); 573 if (cmd.lba != -1) { 574 trace_scsi_req_parsed_lba(d->id, lun, tag, buf[0], 575 cmd.lba); 576 } 577 578 if (cmd.xfer > INT32_MAX) { 579 req = scsi_req_alloc(&reqops_invalid_field, d, tag, lun, hba_private); 580 } else if ((d->unit_attention.key == UNIT_ATTENTION || 581 bus->unit_attention.key == UNIT_ATTENTION) && 582 (buf[0] != INQUIRY && 583 buf[0] != REPORT_LUNS && 584 buf[0] != GET_CONFIGURATION && 585 buf[0] != GET_EVENT_STATUS_NOTIFICATION && 586 587 /* 588 * If we already have a pending unit attention condition, 589 * report this one before triggering another one. 590 */ 591 !(buf[0] == REQUEST_SENSE && d->sense_is_ua))) { 592 req = scsi_req_alloc(&reqops_unit_attention, d, tag, lun, 593 hba_private); 594 } else if (lun != d->lun || 595 buf[0] == REPORT_LUNS || 596 (buf[0] == REQUEST_SENSE && d->sense_len)) { 597 req = scsi_req_alloc(&reqops_target_command, d, tag, lun, 598 hba_private); 599 } else { 600 req = scsi_device_alloc_req(d, tag, lun, buf, hba_private); 601 } 602 } 603 604 req->cmd = cmd; 605 req->resid = req->cmd.xfer; 606 607 switch (buf[0]) { 608 case INQUIRY: 609 trace_scsi_inquiry(d->id, lun, tag, cmd.buf[1], cmd.buf[2]); 610 break; 611 case TEST_UNIT_READY: 612 trace_scsi_test_unit_ready(d->id, lun, tag); 613 break; 614 case REPORT_LUNS: 615 trace_scsi_report_luns(d->id, lun, tag); 616 break; 617 case REQUEST_SENSE: 618 trace_scsi_request_sense(d->id, lun, tag); 619 break; 620 default: 621 break; 622 } 623 624 return req; 625 } 626 627 uint8_t *scsi_req_get_buf(SCSIRequest *req) 628 { 629 return req->ops->get_buf(req); 630 } 631 632 static void scsi_clear_unit_attention(SCSIRequest *req) 633 { 634 SCSISense *ua; 635 if (req->dev->unit_attention.key != UNIT_ATTENTION && 636 req->bus->unit_attention.key != UNIT_ATTENTION) { 637 return; 638 } 639 640 /* 641 * If an INQUIRY command enters the enabled command state, 642 * the device server shall [not] clear any unit attention condition; 643 * See also MMC-6, paragraphs 6.5 and 6.6.2. 644 */ 645 if (req->cmd.buf[0] == INQUIRY || 646 req->cmd.buf[0] == GET_CONFIGURATION || 647 req->cmd.buf[0] == GET_EVENT_STATUS_NOTIFICATION) { 648 return; 649 } 650 651 if (req->dev->unit_attention.key == UNIT_ATTENTION) { 652 ua = &req->dev->unit_attention; 653 } else { 654 ua = &req->bus->unit_attention; 655 } 656 657 /* 658 * If a REPORT LUNS command enters the enabled command state, [...] 659 * the device server shall clear any pending unit attention condition 660 * with an additional sense code of REPORTED LUNS DATA HAS CHANGED. 661 */ 662 if (req->cmd.buf[0] == REPORT_LUNS && 663 !(ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc && 664 ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq)) { 665 return; 666 } 667 668 *ua = SENSE_CODE(NO_SENSE); 669 } 670 671 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len) 672 { 673 int ret; 674 675 assert(len >= 14); 676 if (!req->sense_len) { 677 return 0; 678 } 679 680 ret = scsi_build_sense(req->sense, req->sense_len, buf, len, true); 681 682 /* 683 * FIXME: clearing unit attention conditions upon autosense should be done 684 * only if the UA_INTLCK_CTRL field in the Control mode page is set to 00b 685 * (SAM-5, 5.14). 686 * 687 * We assume UA_INTLCK_CTRL to be 00b for HBAs that support autosense, and 688 * 10b for HBAs that do not support it (do not call scsi_req_get_sense). 689 * Here we handle unit attention clearing for UA_INTLCK_CTRL == 00b. 690 */ 691 if (req->dev->sense_is_ua) { 692 scsi_device_unit_attention_reported(req->dev); 693 req->dev->sense_len = 0; 694 req->dev->sense_is_ua = false; 695 } 696 return ret; 697 } 698 699 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed) 700 { 701 return scsi_build_sense(dev->sense, dev->sense_len, buf, len, fixed); 702 } 703 704 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense) 705 { 706 trace_scsi_req_build_sense(req->dev->id, req->lun, req->tag, 707 sense.key, sense.asc, sense.ascq); 708 memset(req->sense, 0, 18); 709 req->sense[0] = 0x70; 710 req->sense[2] = sense.key; 711 req->sense[7] = 10; 712 req->sense[12] = sense.asc; 713 req->sense[13] = sense.ascq; 714 req->sense_len = 18; 715 } 716 717 static void scsi_req_enqueue_internal(SCSIRequest *req) 718 { 719 assert(!req->enqueued); 720 scsi_req_ref(req); 721 if (req->bus->info->get_sg_list) { 722 req->sg = req->bus->info->get_sg_list(req); 723 } else { 724 req->sg = NULL; 725 } 726 req->enqueued = true; 727 QTAILQ_INSERT_TAIL(&req->dev->requests, req, next); 728 } 729 730 int32_t scsi_req_enqueue(SCSIRequest *req) 731 { 732 int32_t rc; 733 734 assert(!req->retry); 735 scsi_req_enqueue_internal(req); 736 scsi_req_ref(req); 737 rc = req->ops->send_command(req, req->cmd.buf); 738 scsi_req_unref(req); 739 return rc; 740 } 741 742 static void scsi_req_dequeue(SCSIRequest *req) 743 { 744 trace_scsi_req_dequeue(req->dev->id, req->lun, req->tag); 745 req->retry = false; 746 if (req->enqueued) { 747 QTAILQ_REMOVE(&req->dev->requests, req, next); 748 req->enqueued = false; 749 scsi_req_unref(req); 750 } 751 } 752 753 static int scsi_get_performance_length(int num_desc, int type, int data_type) 754 { 755 /* MMC-6, paragraph 6.7. */ 756 switch (type) { 757 case 0: 758 if ((data_type & 3) == 0) { 759 /* Each descriptor is as in Table 295 - Nominal performance. */ 760 return 16 * num_desc + 8; 761 } else { 762 /* Each descriptor is as in Table 296 - Exceptions. */ 763 return 6 * num_desc + 8; 764 } 765 case 1: 766 case 4: 767 case 5: 768 return 8 * num_desc + 8; 769 case 2: 770 return 2048 * num_desc + 8; 771 case 3: 772 return 16 * num_desc + 8; 773 default: 774 return 8; 775 } 776 } 777 778 static int ata_passthrough_xfer_unit(SCSIDevice *dev, uint8_t *buf) 779 { 780 int byte_block = (buf[2] >> 2) & 0x1; 781 int type = (buf[2] >> 4) & 0x1; 782 int xfer_unit; 783 784 if (byte_block) { 785 if (type) { 786 xfer_unit = dev->blocksize; 787 } else { 788 xfer_unit = 512; 789 } 790 } else { 791 xfer_unit = 1; 792 } 793 794 return xfer_unit; 795 } 796 797 static int ata_passthrough_12_xfer_size(SCSIDevice *dev, uint8_t *buf) 798 { 799 int length = buf[2] & 0x3; 800 int xfer; 801 int unit = ata_passthrough_xfer_unit(dev, buf); 802 803 switch (length) { 804 case 0: 805 case 3: /* USB-specific. */ 806 default: 807 xfer = 0; 808 break; 809 case 1: 810 xfer = buf[3]; 811 break; 812 case 2: 813 xfer = buf[4]; 814 break; 815 } 816 817 return xfer * unit; 818 } 819 820 static int ata_passthrough_16_xfer_size(SCSIDevice *dev, uint8_t *buf) 821 { 822 int extend = buf[1] & 0x1; 823 int length = buf[2] & 0x3; 824 int xfer; 825 int unit = ata_passthrough_xfer_unit(dev, buf); 826 827 switch (length) { 828 case 0: 829 case 3: /* USB-specific. */ 830 default: 831 xfer = 0; 832 break; 833 case 1: 834 xfer = buf[4]; 835 xfer |= (extend ? buf[3] << 8 : 0); 836 break; 837 case 2: 838 xfer = buf[6]; 839 xfer |= (extend ? buf[5] << 8 : 0); 840 break; 841 } 842 843 return xfer * unit; 844 } 845 846 uint32_t scsi_data_cdb_length(uint8_t *buf) 847 { 848 if ((buf[0] >> 5) == 0 && buf[4] == 0) { 849 return 256; 850 } else { 851 return scsi_cdb_length(buf); 852 } 853 } 854 855 uint32_t scsi_cdb_length(uint8_t *buf) 856 { 857 switch (buf[0] >> 5) { 858 case 0: 859 return buf[4]; 860 break; 861 case 1: 862 case 2: 863 return lduw_be_p(&buf[7]); 864 break; 865 case 4: 866 return ldl_be_p(&buf[10]) & 0xffffffffULL; 867 break; 868 case 5: 869 return ldl_be_p(&buf[6]) & 0xffffffffULL; 870 break; 871 default: 872 return -1; 873 } 874 } 875 876 static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 877 { 878 cmd->xfer = scsi_cdb_length(buf); 879 switch (buf[0]) { 880 case TEST_UNIT_READY: 881 case REWIND: 882 case START_STOP: 883 case SET_CAPACITY: 884 case WRITE_FILEMARKS: 885 case WRITE_FILEMARKS_16: 886 case SPACE: 887 case RESERVE: 888 case RELEASE: 889 case ERASE: 890 case ALLOW_MEDIUM_REMOVAL: 891 case SEEK_10: 892 case SYNCHRONIZE_CACHE: 893 case SYNCHRONIZE_CACHE_16: 894 case LOCATE_16: 895 case LOCK_UNLOCK_CACHE: 896 case SET_CD_SPEED: 897 case SET_LIMITS: 898 case WRITE_LONG_10: 899 case UPDATE_BLOCK: 900 case RESERVE_TRACK: 901 case SET_READ_AHEAD: 902 case PRE_FETCH: 903 case PRE_FETCH_16: 904 case ALLOW_OVERWRITE: 905 cmd->xfer = 0; 906 break; 907 case VERIFY_10: 908 case VERIFY_12: 909 case VERIFY_16: 910 if ((buf[1] & 2) == 0) { 911 cmd->xfer = 0; 912 } else if ((buf[1] & 4) != 0) { 913 cmd->xfer = 1; 914 } 915 cmd->xfer *= dev->blocksize; 916 break; 917 case MODE_SENSE: 918 break; 919 case WRITE_SAME_10: 920 case WRITE_SAME_16: 921 cmd->xfer = dev->blocksize; 922 break; 923 case READ_CAPACITY_10: 924 cmd->xfer = 8; 925 break; 926 case READ_BLOCK_LIMITS: 927 cmd->xfer = 6; 928 break; 929 case SEND_VOLUME_TAG: 930 /* GPCMD_SET_STREAMING from multimedia commands. */ 931 if (dev->type == TYPE_ROM) { 932 cmd->xfer = buf[10] | (buf[9] << 8); 933 } else { 934 cmd->xfer = buf[9] | (buf[8] << 8); 935 } 936 break; 937 case WRITE_6: 938 /* length 0 means 256 blocks */ 939 if (cmd->xfer == 0) { 940 cmd->xfer = 256; 941 } 942 /* fall through */ 943 case WRITE_10: 944 case WRITE_VERIFY_10: 945 case WRITE_12: 946 case WRITE_VERIFY_12: 947 case WRITE_16: 948 case WRITE_VERIFY_16: 949 cmd->xfer *= dev->blocksize; 950 break; 951 case READ_6: 952 case READ_REVERSE: 953 /* length 0 means 256 blocks */ 954 if (cmd->xfer == 0) { 955 cmd->xfer = 256; 956 } 957 /* fall through */ 958 case READ_10: 959 case RECOVER_BUFFERED_DATA: 960 case READ_12: 961 case READ_16: 962 cmd->xfer *= dev->blocksize; 963 break; 964 case FORMAT_UNIT: 965 /* MMC mandates the parameter list to be 12-bytes long. Parameters 966 * for block devices are restricted to the header right now. */ 967 if (dev->type == TYPE_ROM && (buf[1] & 16)) { 968 cmd->xfer = 12; 969 } else { 970 cmd->xfer = (buf[1] & 16) == 0 ? 0 : (buf[1] & 32 ? 8 : 4); 971 } 972 break; 973 case INQUIRY: 974 case RECEIVE_DIAGNOSTIC: 975 case SEND_DIAGNOSTIC: 976 cmd->xfer = buf[4] | (buf[3] << 8); 977 break; 978 case READ_CD: 979 case READ_BUFFER: 980 case WRITE_BUFFER: 981 case SEND_CUE_SHEET: 982 cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16); 983 break; 984 case PERSISTENT_RESERVE_OUT: 985 cmd->xfer = ldl_be_p(&buf[5]) & 0xffffffffULL; 986 break; 987 case ERASE_12: 988 if (dev->type == TYPE_ROM) { 989 /* MMC command GET PERFORMANCE. */ 990 cmd->xfer = scsi_get_performance_length(buf[9] | (buf[8] << 8), 991 buf[10], buf[1] & 0x1f); 992 } 993 break; 994 case MECHANISM_STATUS: 995 case READ_DVD_STRUCTURE: 996 case SEND_DVD_STRUCTURE: 997 case MAINTENANCE_OUT: 998 case MAINTENANCE_IN: 999 if (dev->type == TYPE_ROM) { 1000 /* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */ 1001 cmd->xfer = buf[9] | (buf[8] << 8); 1002 } 1003 break; 1004 case ATA_PASSTHROUGH_12: 1005 if (dev->type == TYPE_ROM) { 1006 /* BLANK command of MMC */ 1007 cmd->xfer = 0; 1008 } else { 1009 cmd->xfer = ata_passthrough_12_xfer_size(dev, buf); 1010 } 1011 break; 1012 case ATA_PASSTHROUGH_16: 1013 cmd->xfer = ata_passthrough_16_xfer_size(dev, buf); 1014 break; 1015 } 1016 return 0; 1017 } 1018 1019 static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1020 { 1021 switch (buf[0]) { 1022 /* stream commands */ 1023 case ERASE_12: 1024 case ERASE_16: 1025 cmd->xfer = 0; 1026 break; 1027 case READ_6: 1028 case READ_REVERSE: 1029 case RECOVER_BUFFERED_DATA: 1030 case WRITE_6: 1031 cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16); 1032 if (buf[1] & 0x01) { /* fixed */ 1033 cmd->xfer *= dev->blocksize; 1034 } 1035 break; 1036 case READ_16: 1037 case READ_REVERSE_16: 1038 case VERIFY_16: 1039 case WRITE_16: 1040 cmd->xfer = buf[14] | (buf[13] << 8) | (buf[12] << 16); 1041 if (buf[1] & 0x01) { /* fixed */ 1042 cmd->xfer *= dev->blocksize; 1043 } 1044 break; 1045 case REWIND: 1046 case LOAD_UNLOAD: 1047 cmd->xfer = 0; 1048 break; 1049 case SPACE_16: 1050 cmd->xfer = buf[13] | (buf[12] << 8); 1051 break; 1052 case READ_POSITION: 1053 switch (buf[1] & 0x1f) /* operation code */ { 1054 case SHORT_FORM_BLOCK_ID: 1055 case SHORT_FORM_VENDOR_SPECIFIC: 1056 cmd->xfer = 20; 1057 break; 1058 case LONG_FORM: 1059 cmd->xfer = 32; 1060 break; 1061 case EXTENDED_FORM: 1062 cmd->xfer = buf[8] | (buf[7] << 8); 1063 break; 1064 default: 1065 return -1; 1066 } 1067 1068 break; 1069 case FORMAT_UNIT: 1070 cmd->xfer = buf[4] | (buf[3] << 8); 1071 break; 1072 /* generic commands */ 1073 default: 1074 return scsi_req_length(cmd, dev, buf); 1075 } 1076 return 0; 1077 } 1078 1079 static int scsi_req_medium_changer_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1080 { 1081 switch (buf[0]) { 1082 /* medium changer commands */ 1083 case EXCHANGE_MEDIUM: 1084 case INITIALIZE_ELEMENT_STATUS: 1085 case INITIALIZE_ELEMENT_STATUS_WITH_RANGE: 1086 case MOVE_MEDIUM: 1087 case POSITION_TO_ELEMENT: 1088 cmd->xfer = 0; 1089 break; 1090 case READ_ELEMENT_STATUS: 1091 cmd->xfer = buf[9] | (buf[8] << 8) | (buf[7] << 16); 1092 break; 1093 1094 /* generic commands */ 1095 default: 1096 return scsi_req_length(cmd, dev, buf); 1097 } 1098 return 0; 1099 } 1100 1101 1102 static void scsi_cmd_xfer_mode(SCSICommand *cmd) 1103 { 1104 if (!cmd->xfer) { 1105 cmd->mode = SCSI_XFER_NONE; 1106 return; 1107 } 1108 switch (cmd->buf[0]) { 1109 case WRITE_6: 1110 case WRITE_10: 1111 case WRITE_VERIFY_10: 1112 case WRITE_12: 1113 case WRITE_VERIFY_12: 1114 case WRITE_16: 1115 case WRITE_VERIFY_16: 1116 case VERIFY_10: 1117 case VERIFY_12: 1118 case VERIFY_16: 1119 case COPY: 1120 case COPY_VERIFY: 1121 case COMPARE: 1122 case CHANGE_DEFINITION: 1123 case LOG_SELECT: 1124 case MODE_SELECT: 1125 case MODE_SELECT_10: 1126 case SEND_DIAGNOSTIC: 1127 case WRITE_BUFFER: 1128 case FORMAT_UNIT: 1129 case REASSIGN_BLOCKS: 1130 case SEARCH_EQUAL: 1131 case SEARCH_HIGH: 1132 case SEARCH_LOW: 1133 case UPDATE_BLOCK: 1134 case WRITE_LONG_10: 1135 case WRITE_SAME_10: 1136 case WRITE_SAME_16: 1137 case UNMAP: 1138 case SEARCH_HIGH_12: 1139 case SEARCH_EQUAL_12: 1140 case SEARCH_LOW_12: 1141 case MEDIUM_SCAN: 1142 case SEND_VOLUME_TAG: 1143 case SEND_CUE_SHEET: 1144 case SEND_DVD_STRUCTURE: 1145 case PERSISTENT_RESERVE_OUT: 1146 case MAINTENANCE_OUT: 1147 cmd->mode = SCSI_XFER_TO_DEV; 1148 break; 1149 case ATA_PASSTHROUGH_12: 1150 case ATA_PASSTHROUGH_16: 1151 /* T_DIR */ 1152 cmd->mode = (cmd->buf[2] & 0x8) ? 1153 SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV; 1154 break; 1155 default: 1156 cmd->mode = SCSI_XFER_FROM_DEV; 1157 break; 1158 } 1159 } 1160 1161 static uint64_t scsi_cmd_lba(SCSICommand *cmd) 1162 { 1163 uint8_t *buf = cmd->buf; 1164 uint64_t lba; 1165 1166 switch (buf[0] >> 5) { 1167 case 0: 1168 lba = ldl_be_p(&buf[0]) & 0x1fffff; 1169 break; 1170 case 1: 1171 case 2: 1172 case 5: 1173 lba = ldl_be_p(&buf[2]) & 0xffffffffULL; 1174 break; 1175 case 4: 1176 lba = ldq_be_p(&buf[2]); 1177 break; 1178 default: 1179 lba = -1; 1180 1181 } 1182 return lba; 1183 } 1184 1185 static int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1186 { 1187 int rc; 1188 1189 switch (buf[0] >> 5) { 1190 case 0: 1191 cmd->len = 6; 1192 break; 1193 case 1: 1194 case 2: 1195 cmd->len = 10; 1196 break; 1197 case 4: 1198 cmd->len = 16; 1199 break; 1200 case 5: 1201 cmd->len = 12; 1202 break; 1203 default: 1204 return -1; 1205 } 1206 1207 switch (dev->type) { 1208 case TYPE_TAPE: 1209 rc = scsi_req_stream_length(cmd, dev, buf); 1210 break; 1211 case TYPE_MEDIUM_CHANGER: 1212 rc = scsi_req_medium_changer_length(cmd, dev, buf); 1213 break; 1214 default: 1215 rc = scsi_req_length(cmd, dev, buf); 1216 break; 1217 } 1218 1219 if (rc != 0) 1220 return rc; 1221 1222 memcpy(cmd->buf, buf, cmd->len); 1223 scsi_cmd_xfer_mode(cmd); 1224 cmd->lba = scsi_cmd_lba(cmd); 1225 return 0; 1226 } 1227 1228 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense) 1229 { 1230 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); 1231 1232 scsi_device_set_ua(dev, sense); 1233 if (bus->info->change) { 1234 bus->info->change(bus, dev, sense); 1235 } 1236 } 1237 1238 /* 1239 * Predefined sense codes 1240 */ 1241 1242 /* No sense data available */ 1243 const struct SCSISense sense_code_NO_SENSE = { 1244 .key = NO_SENSE , .asc = 0x00 , .ascq = 0x00 1245 }; 1246 1247 /* LUN not ready, Manual intervention required */ 1248 const struct SCSISense sense_code_LUN_NOT_READY = { 1249 .key = NOT_READY, .asc = 0x04, .ascq = 0x03 1250 }; 1251 1252 /* LUN not ready, Medium not present */ 1253 const struct SCSISense sense_code_NO_MEDIUM = { 1254 .key = NOT_READY, .asc = 0x3a, .ascq = 0x00 1255 }; 1256 1257 /* LUN not ready, medium removal prevented */ 1258 const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = { 1259 .key = NOT_READY, .asc = 0x53, .ascq = 0x02 1260 }; 1261 1262 /* Hardware error, internal target failure */ 1263 const struct SCSISense sense_code_TARGET_FAILURE = { 1264 .key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00 1265 }; 1266 1267 /* Illegal request, invalid command operation code */ 1268 const struct SCSISense sense_code_INVALID_OPCODE = { 1269 .key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00 1270 }; 1271 1272 /* Illegal request, LBA out of range */ 1273 const struct SCSISense sense_code_LBA_OUT_OF_RANGE = { 1274 .key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00 1275 }; 1276 1277 /* Illegal request, Invalid field in CDB */ 1278 const struct SCSISense sense_code_INVALID_FIELD = { 1279 .key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00 1280 }; 1281 1282 /* Illegal request, Invalid field in parameter list */ 1283 const struct SCSISense sense_code_INVALID_PARAM = { 1284 .key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x00 1285 }; 1286 1287 /* Illegal request, Parameter list length error */ 1288 const struct SCSISense sense_code_INVALID_PARAM_LEN = { 1289 .key = ILLEGAL_REQUEST, .asc = 0x1a, .ascq = 0x00 1290 }; 1291 1292 /* Illegal request, LUN not supported */ 1293 const struct SCSISense sense_code_LUN_NOT_SUPPORTED = { 1294 .key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00 1295 }; 1296 1297 /* Illegal request, Saving parameters not supported */ 1298 const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = { 1299 .key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00 1300 }; 1301 1302 /* Illegal request, Incompatible medium installed */ 1303 const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = { 1304 .key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00 1305 }; 1306 1307 /* Illegal request, medium removal prevented */ 1308 const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = { 1309 .key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x02 1310 }; 1311 1312 /* Illegal request, Invalid Transfer Tag */ 1313 const struct SCSISense sense_code_INVALID_TAG = { 1314 .key = ILLEGAL_REQUEST, .asc = 0x4b, .ascq = 0x01 1315 }; 1316 1317 /* Command aborted, I/O process terminated */ 1318 const struct SCSISense sense_code_IO_ERROR = { 1319 .key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06 1320 }; 1321 1322 /* Command aborted, I_T Nexus loss occurred */ 1323 const struct SCSISense sense_code_I_T_NEXUS_LOSS = { 1324 .key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07 1325 }; 1326 1327 /* Command aborted, Logical Unit failure */ 1328 const struct SCSISense sense_code_LUN_FAILURE = { 1329 .key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01 1330 }; 1331 1332 /* Command aborted, Overlapped Commands Attempted */ 1333 const struct SCSISense sense_code_OVERLAPPED_COMMANDS = { 1334 .key = ABORTED_COMMAND, .asc = 0x4e, .ascq = 0x00 1335 }; 1336 1337 /* Unit attention, Capacity data has changed */ 1338 const struct SCSISense sense_code_CAPACITY_CHANGED = { 1339 .key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09 1340 }; 1341 1342 /* Unit attention, Power on, reset or bus device reset occurred */ 1343 const struct SCSISense sense_code_RESET = { 1344 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00 1345 }; 1346 1347 /* Unit attention, No medium */ 1348 const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = { 1349 .key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00 1350 }; 1351 1352 /* Unit attention, Medium may have changed */ 1353 const struct SCSISense sense_code_MEDIUM_CHANGED = { 1354 .key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00 1355 }; 1356 1357 /* Unit attention, Reported LUNs data has changed */ 1358 const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = { 1359 .key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e 1360 }; 1361 1362 /* Unit attention, Device internal reset */ 1363 const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = { 1364 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04 1365 }; 1366 1367 /* Data Protection, Write Protected */ 1368 const struct SCSISense sense_code_WRITE_PROTECTED = { 1369 .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00 1370 }; 1371 1372 /* Data Protection, Space Allocation Failed Write Protect */ 1373 const struct SCSISense sense_code_SPACE_ALLOC_FAILED = { 1374 .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x07 1375 }; 1376 1377 /* 1378 * scsi_build_sense 1379 * 1380 * Convert between fixed and descriptor sense buffers 1381 */ 1382 int scsi_build_sense(uint8_t *in_buf, int in_len, 1383 uint8_t *buf, int len, bool fixed) 1384 { 1385 bool fixed_in; 1386 SCSISense sense; 1387 if (!fixed && len < 8) { 1388 return 0; 1389 } 1390 1391 if (in_len == 0) { 1392 sense.key = NO_SENSE; 1393 sense.asc = 0; 1394 sense.ascq = 0; 1395 } else { 1396 fixed_in = (in_buf[0] & 2) == 0; 1397 1398 if (fixed == fixed_in) { 1399 memcpy(buf, in_buf, MIN(len, in_len)); 1400 return MIN(len, in_len); 1401 } 1402 1403 if (fixed_in) { 1404 sense.key = in_buf[2]; 1405 sense.asc = in_buf[12]; 1406 sense.ascq = in_buf[13]; 1407 } else { 1408 sense.key = in_buf[1]; 1409 sense.asc = in_buf[2]; 1410 sense.ascq = in_buf[3]; 1411 } 1412 } 1413 1414 memset(buf, 0, len); 1415 if (fixed) { 1416 /* Return fixed format sense buffer */ 1417 buf[0] = 0x70; 1418 buf[2] = sense.key; 1419 buf[7] = 10; 1420 buf[12] = sense.asc; 1421 buf[13] = sense.ascq; 1422 return MIN(len, SCSI_SENSE_LEN); 1423 } else { 1424 /* Return descriptor format sense buffer */ 1425 buf[0] = 0x72; 1426 buf[1] = sense.key; 1427 buf[2] = sense.asc; 1428 buf[3] = sense.ascq; 1429 return 8; 1430 } 1431 } 1432 1433 const char *scsi_command_name(uint8_t cmd) 1434 { 1435 static const char *names[] = { 1436 [ TEST_UNIT_READY ] = "TEST_UNIT_READY", 1437 [ REWIND ] = "REWIND", 1438 [ REQUEST_SENSE ] = "REQUEST_SENSE", 1439 [ FORMAT_UNIT ] = "FORMAT_UNIT", 1440 [ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS", 1441 [ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS", 1442 /* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */ 1443 [ READ_6 ] = "READ_6", 1444 [ WRITE_6 ] = "WRITE_6", 1445 [ SET_CAPACITY ] = "SET_CAPACITY", 1446 [ READ_REVERSE ] = "READ_REVERSE", 1447 [ WRITE_FILEMARKS ] = "WRITE_FILEMARKS", 1448 [ SPACE ] = "SPACE", 1449 [ INQUIRY ] = "INQUIRY", 1450 [ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA", 1451 [ MAINTENANCE_IN ] = "MAINTENANCE_IN", 1452 [ MAINTENANCE_OUT ] = "MAINTENANCE_OUT", 1453 [ MODE_SELECT ] = "MODE_SELECT", 1454 [ RESERVE ] = "RESERVE", 1455 [ RELEASE ] = "RELEASE", 1456 [ COPY ] = "COPY", 1457 [ ERASE ] = "ERASE", 1458 [ MODE_SENSE ] = "MODE_SENSE", 1459 [ START_STOP ] = "START_STOP/LOAD_UNLOAD", 1460 /* LOAD_UNLOAD and START_STOP use the same operation code */ 1461 [ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC", 1462 [ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC", 1463 [ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL", 1464 [ READ_CAPACITY_10 ] = "READ_CAPACITY_10", 1465 [ READ_10 ] = "READ_10", 1466 [ WRITE_10 ] = "WRITE_10", 1467 [ SEEK_10 ] = "SEEK_10/POSITION_TO_ELEMENT", 1468 /* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */ 1469 [ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10", 1470 [ VERIFY_10 ] = "VERIFY_10", 1471 [ SEARCH_HIGH ] = "SEARCH_HIGH", 1472 [ SEARCH_EQUAL ] = "SEARCH_EQUAL", 1473 [ SEARCH_LOW ] = "SEARCH_LOW", 1474 [ SET_LIMITS ] = "SET_LIMITS", 1475 [ PRE_FETCH ] = "PRE_FETCH/READ_POSITION", 1476 /* READ_POSITION and PRE_FETCH use the same operation code */ 1477 [ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE", 1478 [ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE", 1479 [ READ_DEFECT_DATA ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE", 1480 /* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */ 1481 [ MEDIUM_SCAN ] = "MEDIUM_SCAN", 1482 [ COMPARE ] = "COMPARE", 1483 [ COPY_VERIFY ] = "COPY_VERIFY", 1484 [ WRITE_BUFFER ] = "WRITE_BUFFER", 1485 [ READ_BUFFER ] = "READ_BUFFER", 1486 [ UPDATE_BLOCK ] = "UPDATE_BLOCK", 1487 [ READ_LONG_10 ] = "READ_LONG_10", 1488 [ WRITE_LONG_10 ] = "WRITE_LONG_10", 1489 [ CHANGE_DEFINITION ] = "CHANGE_DEFINITION", 1490 [ WRITE_SAME_10 ] = "WRITE_SAME_10", 1491 [ UNMAP ] = "UNMAP", 1492 [ READ_TOC ] = "READ_TOC", 1493 [ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT", 1494 [ SANITIZE ] = "SANITIZE", 1495 [ GET_CONFIGURATION ] = "GET_CONFIGURATION", 1496 [ LOG_SELECT ] = "LOG_SELECT", 1497 [ LOG_SENSE ] = "LOG_SENSE", 1498 [ MODE_SELECT_10 ] = "MODE_SELECT_10", 1499 [ RESERVE_10 ] = "RESERVE_10", 1500 [ RELEASE_10 ] = "RELEASE_10", 1501 [ MODE_SENSE_10 ] = "MODE_SENSE_10", 1502 [ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN", 1503 [ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT", 1504 [ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16", 1505 [ EXTENDED_COPY ] = "EXTENDED_COPY", 1506 [ ATA_PASSTHROUGH_16 ] = "ATA_PASSTHROUGH_16", 1507 [ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN", 1508 [ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT", 1509 [ READ_16 ] = "READ_16", 1510 [ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE", 1511 [ WRITE_16 ] = "WRITE_16", 1512 [ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16", 1513 [ VERIFY_16 ] = "VERIFY_16", 1514 [ PRE_FETCH_16 ] = "PRE_FETCH_16", 1515 [ SYNCHRONIZE_CACHE_16 ] = "SPACE_16/SYNCHRONIZE_CACHE_16", 1516 /* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */ 1517 [ LOCATE_16 ] = "LOCATE_16", 1518 [ WRITE_SAME_16 ] = "ERASE_16/WRITE_SAME_16", 1519 /* ERASE_16 and WRITE_SAME_16 use the same operation code */ 1520 [ SERVICE_ACTION_IN_16 ] = "SERVICE_ACTION_IN_16", 1521 [ WRITE_LONG_16 ] = "WRITE_LONG_16", 1522 [ REPORT_LUNS ] = "REPORT_LUNS", 1523 [ ATA_PASSTHROUGH_12 ] = "BLANK/ATA_PASSTHROUGH_12", 1524 [ MOVE_MEDIUM ] = "MOVE_MEDIUM", 1525 [ EXCHANGE_MEDIUM ] = "EXCHANGE MEDIUM", 1526 [ READ_12 ] = "READ_12", 1527 [ WRITE_12 ] = "WRITE_12", 1528 [ ERASE_12 ] = "ERASE_12/GET_PERFORMANCE", 1529 /* ERASE_12 and GET_PERFORMANCE use the same operation code */ 1530 [ SERVICE_ACTION_IN_12 ] = "SERVICE_ACTION_IN_12", 1531 [ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12", 1532 [ VERIFY_12 ] = "VERIFY_12", 1533 [ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12", 1534 [ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12", 1535 [ SEARCH_LOW_12 ] = "SEARCH_LOW_12", 1536 [ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS", 1537 [ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG/SET_STREAMING", 1538 /* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */ 1539 [ READ_CD ] = "READ_CD", 1540 [ READ_DEFECT_DATA_12 ] = "READ_DEFECT_DATA_12", 1541 [ READ_DVD_STRUCTURE ] = "READ_DVD_STRUCTURE", 1542 [ RESERVE_TRACK ] = "RESERVE_TRACK", 1543 [ SEND_CUE_SHEET ] = "SEND_CUE_SHEET", 1544 [ SEND_DVD_STRUCTURE ] = "SEND_DVD_STRUCTURE", 1545 [ SET_CD_SPEED ] = "SET_CD_SPEED", 1546 [ SET_READ_AHEAD ] = "SET_READ_AHEAD", 1547 [ ALLOW_OVERWRITE ] = "ALLOW_OVERWRITE", 1548 [ MECHANISM_STATUS ] = "MECHANISM_STATUS", 1549 [ GET_EVENT_STATUS_NOTIFICATION ] = "GET_EVENT_STATUS_NOTIFICATION", 1550 [ READ_DISC_INFORMATION ] = "READ_DISC_INFORMATION", 1551 }; 1552 1553 if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL) 1554 return "*UNKNOWN*"; 1555 return names[cmd]; 1556 } 1557 1558 SCSIRequest *scsi_req_ref(SCSIRequest *req) 1559 { 1560 assert(req->refcount > 0); 1561 req->refcount++; 1562 return req; 1563 } 1564 1565 void scsi_req_unref(SCSIRequest *req) 1566 { 1567 assert(req->refcount > 0); 1568 if (--req->refcount == 0) { 1569 BusState *qbus = req->dev->qdev.parent_bus; 1570 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, qbus); 1571 1572 if (bus->info->free_request && req->hba_private) { 1573 bus->info->free_request(bus, req->hba_private); 1574 } 1575 if (req->ops->free_req) { 1576 req->ops->free_req(req); 1577 } 1578 object_unref(OBJECT(req->dev)); 1579 object_unref(OBJECT(qbus->parent)); 1580 g_free(req); 1581 } 1582 } 1583 1584 /* Tell the device that we finished processing this chunk of I/O. It 1585 will start the next chunk or complete the command. */ 1586 void scsi_req_continue(SCSIRequest *req) 1587 { 1588 if (req->io_canceled) { 1589 trace_scsi_req_continue_canceled(req->dev->id, req->lun, req->tag); 1590 return; 1591 } 1592 trace_scsi_req_continue(req->dev->id, req->lun, req->tag); 1593 if (req->cmd.mode == SCSI_XFER_TO_DEV) { 1594 req->ops->write_data(req); 1595 } else { 1596 req->ops->read_data(req); 1597 } 1598 } 1599 1600 /* Called by the devices when data is ready for the HBA. The HBA should 1601 start a DMA operation to read or fill the device's data buffer. 1602 Once it completes, calling scsi_req_continue will restart I/O. */ 1603 void scsi_req_data(SCSIRequest *req, int len) 1604 { 1605 uint8_t *buf; 1606 if (req->io_canceled) { 1607 trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len); 1608 return; 1609 } 1610 trace_scsi_req_data(req->dev->id, req->lun, req->tag, len); 1611 assert(req->cmd.mode != SCSI_XFER_NONE); 1612 if (!req->sg) { 1613 req->resid -= len; 1614 req->bus->info->transfer_data(req, len); 1615 return; 1616 } 1617 1618 /* If the device calls scsi_req_data and the HBA specified a 1619 * scatter/gather list, the transfer has to happen in a single 1620 * step. */ 1621 assert(!req->dma_started); 1622 req->dma_started = true; 1623 1624 buf = scsi_req_get_buf(req); 1625 if (req->cmd.mode == SCSI_XFER_FROM_DEV) { 1626 req->resid = dma_buf_read(buf, len, req->sg); 1627 } else { 1628 req->resid = dma_buf_write(buf, len, req->sg); 1629 } 1630 scsi_req_continue(req); 1631 } 1632 1633 void scsi_req_print(SCSIRequest *req) 1634 { 1635 FILE *fp = stderr; 1636 int i; 1637 1638 fprintf(fp, "[%s id=%d] %s", 1639 req->dev->qdev.parent_bus->name, 1640 req->dev->id, 1641 scsi_command_name(req->cmd.buf[0])); 1642 for (i = 1; i < req->cmd.len; i++) { 1643 fprintf(fp, " 0x%02x", req->cmd.buf[i]); 1644 } 1645 switch (req->cmd.mode) { 1646 case SCSI_XFER_NONE: 1647 fprintf(fp, " - none\n"); 1648 break; 1649 case SCSI_XFER_FROM_DEV: 1650 fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer); 1651 break; 1652 case SCSI_XFER_TO_DEV: 1653 fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer); 1654 break; 1655 default: 1656 fprintf(fp, " - Oops\n"); 1657 break; 1658 } 1659 } 1660 1661 void scsi_req_complete(SCSIRequest *req, int status) 1662 { 1663 assert(req->status == -1); 1664 req->status = status; 1665 1666 assert(req->sense_len <= sizeof(req->sense)); 1667 if (status == GOOD) { 1668 req->sense_len = 0; 1669 } 1670 1671 if (req->sense_len) { 1672 memcpy(req->dev->sense, req->sense, req->sense_len); 1673 req->dev->sense_len = req->sense_len; 1674 req->dev->sense_is_ua = (req->ops == &reqops_unit_attention); 1675 } else { 1676 req->dev->sense_len = 0; 1677 req->dev->sense_is_ua = false; 1678 } 1679 1680 /* 1681 * Unit attention state is now stored in the device's sense buffer 1682 * if the HBA didn't do autosense. Clear the pending unit attention 1683 * flags. 1684 */ 1685 scsi_clear_unit_attention(req); 1686 1687 scsi_req_ref(req); 1688 scsi_req_dequeue(req); 1689 req->bus->info->complete(req, req->status, req->resid); 1690 scsi_req_unref(req); 1691 } 1692 1693 void scsi_req_cancel(SCSIRequest *req) 1694 { 1695 trace_scsi_req_cancel(req->dev->id, req->lun, req->tag); 1696 if (!req->enqueued) { 1697 return; 1698 } 1699 scsi_req_ref(req); 1700 scsi_req_dequeue(req); 1701 req->io_canceled = true; 1702 if (req->ops->cancel_io) { 1703 req->ops->cancel_io(req); 1704 } 1705 if (req->bus->info->cancel) { 1706 req->bus->info->cancel(req); 1707 } 1708 scsi_req_unref(req); 1709 } 1710 1711 void scsi_req_abort(SCSIRequest *req, int status) 1712 { 1713 if (!req->enqueued) { 1714 return; 1715 } 1716 scsi_req_ref(req); 1717 scsi_req_dequeue(req); 1718 req->io_canceled = true; 1719 if (req->ops->cancel_io) { 1720 req->ops->cancel_io(req); 1721 } 1722 scsi_req_complete(req, status); 1723 scsi_req_unref(req); 1724 } 1725 1726 static int scsi_ua_precedence(SCSISense sense) 1727 { 1728 if (sense.key != UNIT_ATTENTION) { 1729 return INT_MAX; 1730 } 1731 if (sense.asc == 0x29 && sense.ascq == 0x04) { 1732 /* DEVICE INTERNAL RESET goes with POWER ON OCCURRED */ 1733 return 1; 1734 } else if (sense.asc == 0x3F && sense.ascq == 0x01) { 1735 /* MICROCODE HAS BEEN CHANGED goes with SCSI BUS RESET OCCURRED */ 1736 return 2; 1737 } else if (sense.asc == 0x29 && (sense.ascq == 0x05 || sense.ascq == 0x06)) { 1738 /* These two go with "all others". */ 1739 ; 1740 } else if (sense.asc == 0x29 && sense.ascq <= 0x07) { 1741 /* POWER ON, RESET OR BUS DEVICE RESET OCCURRED = 0 1742 * POWER ON OCCURRED = 1 1743 * SCSI BUS RESET OCCURRED = 2 1744 * BUS DEVICE RESET FUNCTION OCCURRED = 3 1745 * I_T NEXUS LOSS OCCURRED = 7 1746 */ 1747 return sense.ascq; 1748 } else if (sense.asc == 0x2F && sense.ascq == 0x01) { 1749 /* COMMANDS CLEARED BY POWER LOSS NOTIFICATION */ 1750 return 8; 1751 } 1752 return (sense.asc << 8) | sense.ascq; 1753 } 1754 1755 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense) 1756 { 1757 int prec1, prec2; 1758 if (sense.key != UNIT_ATTENTION) { 1759 return; 1760 } 1761 trace_scsi_device_set_ua(sdev->id, sdev->lun, sense.key, 1762 sense.asc, sense.ascq); 1763 1764 /* 1765 * Override a pre-existing unit attention condition, except for a more 1766 * important reset condition. 1767 */ 1768 prec1 = scsi_ua_precedence(sdev->unit_attention); 1769 prec2 = scsi_ua_precedence(sense); 1770 if (prec2 < prec1) { 1771 sdev->unit_attention = sense; 1772 } 1773 } 1774 1775 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense) 1776 { 1777 SCSIRequest *req; 1778 1779 while (!QTAILQ_EMPTY(&sdev->requests)) { 1780 req = QTAILQ_FIRST(&sdev->requests); 1781 scsi_req_cancel(req); 1782 } 1783 1784 scsi_device_set_ua(sdev, sense); 1785 } 1786 1787 static char *scsibus_get_dev_path(DeviceState *dev) 1788 { 1789 SCSIDevice *d = DO_UPCAST(SCSIDevice, qdev, dev); 1790 DeviceState *hba = dev->parent_bus->parent; 1791 char *id; 1792 char *path; 1793 1794 id = qdev_get_dev_path(hba); 1795 if (id) { 1796 path = g_strdup_printf("%s/%d:%d:%d", id, d->channel, d->id, d->lun); 1797 } else { 1798 path = g_strdup_printf("%d:%d:%d", d->channel, d->id, d->lun); 1799 } 1800 g_free(id); 1801 return path; 1802 } 1803 1804 static char *scsibus_get_fw_dev_path(DeviceState *dev) 1805 { 1806 SCSIDevice *d = SCSI_DEVICE(dev); 1807 return g_strdup_printf("channel@%x/%s@%x,%x", d->channel, 1808 qdev_fw_name(dev), d->id, d->lun); 1809 } 1810 1811 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun) 1812 { 1813 BusChild *kid; 1814 SCSIDevice *target_dev = NULL; 1815 1816 QTAILQ_FOREACH_REVERSE(kid, &bus->qbus.children, ChildrenHead, sibling) { 1817 DeviceState *qdev = kid->child; 1818 SCSIDevice *dev = SCSI_DEVICE(qdev); 1819 1820 if (dev->channel == channel && dev->id == id) { 1821 if (dev->lun == lun) { 1822 return dev; 1823 } 1824 target_dev = dev; 1825 } 1826 } 1827 return target_dev; 1828 } 1829 1830 /* SCSI request list. For simplicity, pv points to the whole device */ 1831 1832 static void put_scsi_requests(QEMUFile *f, void *pv, size_t size) 1833 { 1834 SCSIDevice *s = pv; 1835 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); 1836 SCSIRequest *req; 1837 1838 QTAILQ_FOREACH(req, &s->requests, next) { 1839 assert(!req->io_canceled); 1840 assert(req->status == -1); 1841 assert(req->enqueued); 1842 1843 qemu_put_sbyte(f, req->retry ? 1 : 2); 1844 qemu_put_buffer(f, req->cmd.buf, sizeof(req->cmd.buf)); 1845 qemu_put_be32s(f, &req->tag); 1846 qemu_put_be32s(f, &req->lun); 1847 if (bus->info->save_request) { 1848 bus->info->save_request(f, req); 1849 } 1850 if (req->ops->save_request) { 1851 req->ops->save_request(f, req); 1852 } 1853 } 1854 qemu_put_sbyte(f, 0); 1855 } 1856 1857 static int get_scsi_requests(QEMUFile *f, void *pv, size_t size) 1858 { 1859 SCSIDevice *s = pv; 1860 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); 1861 int8_t sbyte; 1862 1863 while ((sbyte = qemu_get_sbyte(f)) > 0) { 1864 uint8_t buf[SCSI_CMD_BUF_SIZE]; 1865 uint32_t tag; 1866 uint32_t lun; 1867 SCSIRequest *req; 1868 1869 qemu_get_buffer(f, buf, sizeof(buf)); 1870 qemu_get_be32s(f, &tag); 1871 qemu_get_be32s(f, &lun); 1872 req = scsi_req_new(s, tag, lun, buf, NULL); 1873 req->retry = (sbyte == 1); 1874 if (bus->info->load_request) { 1875 req->hba_private = bus->info->load_request(f, req); 1876 } 1877 if (req->ops->load_request) { 1878 req->ops->load_request(f, req); 1879 } 1880 1881 /* Just restart it later. */ 1882 scsi_req_enqueue_internal(req); 1883 1884 /* At this point, the request will be kept alive by the reference 1885 * added by scsi_req_enqueue_internal, so we can release our reference. 1886 * The HBA of course will add its own reference in the load_request 1887 * callback if it needs to hold on the SCSIRequest. 1888 */ 1889 scsi_req_unref(req); 1890 } 1891 1892 return 0; 1893 } 1894 1895 static int scsi_qdev_unplug(DeviceState *qdev) 1896 { 1897 SCSIDevice *dev = SCSI_DEVICE(qdev); 1898 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); 1899 1900 if (bus->info->hot_unplug) { 1901 bus->info->hot_unplug(bus, dev); 1902 } 1903 return qdev_simple_unplug_cb(qdev); 1904 } 1905 1906 static const VMStateInfo vmstate_info_scsi_requests = { 1907 .name = "scsi-requests", 1908 .get = get_scsi_requests, 1909 .put = put_scsi_requests, 1910 }; 1911 1912 static bool scsi_sense_state_needed(void *opaque) 1913 { 1914 SCSIDevice *s = opaque; 1915 1916 return s->sense_len > SCSI_SENSE_BUF_SIZE_OLD; 1917 } 1918 1919 static const VMStateDescription vmstate_scsi_sense_state = { 1920 .name = "SCSIDevice/sense", 1921 .version_id = 1, 1922 .minimum_version_id = 1, 1923 .fields = (VMStateField[]) { 1924 VMSTATE_UINT8_SUB_ARRAY(sense, SCSIDevice, 1925 SCSI_SENSE_BUF_SIZE_OLD, 1926 SCSI_SENSE_BUF_SIZE - SCSI_SENSE_BUF_SIZE_OLD), 1927 VMSTATE_END_OF_LIST() 1928 } 1929 }; 1930 1931 const VMStateDescription vmstate_scsi_device = { 1932 .name = "SCSIDevice", 1933 .version_id = 1, 1934 .minimum_version_id = 1, 1935 .fields = (VMStateField[]) { 1936 VMSTATE_UINT8(unit_attention.key, SCSIDevice), 1937 VMSTATE_UINT8(unit_attention.asc, SCSIDevice), 1938 VMSTATE_UINT8(unit_attention.ascq, SCSIDevice), 1939 VMSTATE_BOOL(sense_is_ua, SCSIDevice), 1940 VMSTATE_UINT8_SUB_ARRAY(sense, SCSIDevice, 0, SCSI_SENSE_BUF_SIZE_OLD), 1941 VMSTATE_UINT32(sense_len, SCSIDevice), 1942 { 1943 .name = "requests", 1944 .version_id = 0, 1945 .field_exists = NULL, 1946 .size = 0, /* ouch */ 1947 .info = &vmstate_info_scsi_requests, 1948 .flags = VMS_SINGLE, 1949 .offset = 0, 1950 }, 1951 VMSTATE_END_OF_LIST() 1952 }, 1953 .subsections = (VMStateSubsection []) { 1954 { 1955 .vmsd = &vmstate_scsi_sense_state, 1956 .needed = scsi_sense_state_needed, 1957 }, { 1958 /* empty */ 1959 } 1960 } 1961 }; 1962 1963 static void scsi_device_class_init(ObjectClass *klass, void *data) 1964 { 1965 DeviceClass *k = DEVICE_CLASS(klass); 1966 set_bit(DEVICE_CATEGORY_STORAGE, k->categories); 1967 k->bus_type = TYPE_SCSI_BUS; 1968 k->init = scsi_qdev_init; 1969 k->unplug = scsi_qdev_unplug; 1970 k->exit = scsi_qdev_exit; 1971 k->props = scsi_props; 1972 } 1973 1974 static const TypeInfo scsi_device_type_info = { 1975 .name = TYPE_SCSI_DEVICE, 1976 .parent = TYPE_DEVICE, 1977 .instance_size = sizeof(SCSIDevice), 1978 .abstract = true, 1979 .class_size = sizeof(SCSIDeviceClass), 1980 .class_init = scsi_device_class_init, 1981 }; 1982 1983 static void scsi_register_types(void) 1984 { 1985 type_register_static(&scsi_bus_info); 1986 type_register_static(&scsi_device_type_info); 1987 } 1988 1989 type_init(scsi_register_types) 1990