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