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/block-backend.h" 7 #include "sysemu/blockdev.h" 8 #include "trace.h" 9 #include "sysemu/dma.h" 10 11 static char *scsibus_get_dev_path(DeviceState *dev); 12 static char *scsibus_get_fw_dev_path(DeviceState *dev); 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 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 28 29 k->get_dev_path = scsibus_get_dev_path; 30 k->get_fw_dev_path = scsibus_get_fw_dev_path; 31 hc->unplug = qdev_simple_device_unplug_cb; 32 } 33 34 static const TypeInfo scsi_bus_info = { 35 .name = TYPE_SCSI_BUS, 36 .parent = TYPE_BUS, 37 .instance_size = sizeof(SCSIBus), 38 .class_init = scsi_bus_class_init, 39 .interfaces = (InterfaceInfo[]) { 40 { TYPE_HOTPLUG_HANDLER }, 41 { } 42 } 43 }; 44 static int next_scsi_bus; 45 46 static void scsi_device_realize(SCSIDevice *s, Error **errp) 47 { 48 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); 49 if (sc->realize) { 50 sc->realize(s, errp); 51 } 52 } 53 54 int scsi_bus_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf, 55 void *hba_private) 56 { 57 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); 58 int rc; 59 60 assert(cmd->len == 0); 61 rc = scsi_req_parse_cdb(dev, cmd, buf); 62 if (bus->info->parse_cdb) { 63 rc = bus->info->parse_cdb(dev, cmd, buf, hba_private); 64 } 65 return rc; 66 } 67 68 static SCSIRequest *scsi_device_alloc_req(SCSIDevice *s, uint32_t tag, uint32_t lun, 69 uint8_t *buf, void *hba_private) 70 { 71 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); 72 if (sc->alloc_req) { 73 return sc->alloc_req(s, tag, lun, buf, hba_private); 74 } 75 76 return NULL; 77 } 78 79 void scsi_device_unit_attention_reported(SCSIDevice *s) 80 { 81 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); 82 if (sc->unit_attention_reported) { 83 sc->unit_attention_reported(s); 84 } 85 } 86 87 /* Create a scsi bus, and attach devices to it. */ 88 void scsi_bus_new(SCSIBus *bus, size_t bus_size, DeviceState *host, 89 const SCSIBusInfo *info, const char *bus_name) 90 { 91 qbus_create_inplace(bus, bus_size, TYPE_SCSI_BUS, host, bus_name); 92 bus->busnr = next_scsi_bus++; 93 bus->info = info; 94 qbus_set_bus_hotplug_handler(BUS(bus), &error_abort); 95 } 96 97 static void scsi_dma_restart_bh(void *opaque) 98 { 99 SCSIDevice *s = opaque; 100 SCSIRequest *req, *next; 101 102 qemu_bh_delete(s->bh); 103 s->bh = NULL; 104 105 QTAILQ_FOREACH_SAFE(req, &s->requests, next, next) { 106 scsi_req_ref(req); 107 if (req->retry) { 108 req->retry = false; 109 switch (req->cmd.mode) { 110 case SCSI_XFER_FROM_DEV: 111 case SCSI_XFER_TO_DEV: 112 scsi_req_continue(req); 113 break; 114 case SCSI_XFER_NONE: 115 scsi_req_dequeue(req); 116 scsi_req_enqueue(req); 117 break; 118 } 119 } 120 scsi_req_unref(req); 121 } 122 } 123 124 void scsi_req_retry(SCSIRequest *req) 125 { 126 /* No need to save a reference, because scsi_dma_restart_bh just 127 * looks at the request list. */ 128 req->retry = true; 129 } 130 131 static void scsi_dma_restart_cb(void *opaque, int running, RunState state) 132 { 133 SCSIDevice *s = opaque; 134 135 if (!running) { 136 return; 137 } 138 if (!s->bh) { 139 s->bh = qemu_bh_new(scsi_dma_restart_bh, s); 140 qemu_bh_schedule(s->bh); 141 } 142 } 143 144 static void scsi_qdev_realize(DeviceState *qdev, Error **errp) 145 { 146 SCSIDevice *dev = SCSI_DEVICE(qdev); 147 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); 148 SCSIDevice *d; 149 Error *local_err = NULL; 150 151 if (dev->channel > bus->info->max_channel) { 152 error_setg(errp, "bad scsi channel id: %d", dev->channel); 153 return; 154 } 155 if (dev->id != -1 && dev->id > bus->info->max_target) { 156 error_setg(errp, "bad scsi device id: %d", dev->id); 157 return; 158 } 159 if (dev->lun != -1 && dev->lun > bus->info->max_lun) { 160 error_setg(errp, "bad scsi device lun: %d", dev->lun); 161 return; 162 } 163 164 if (dev->id == -1) { 165 int id = -1; 166 if (dev->lun == -1) { 167 dev->lun = 0; 168 } 169 do { 170 d = scsi_device_find(bus, dev->channel, ++id, dev->lun); 171 } while (d && d->lun == dev->lun && id < bus->info->max_target); 172 if (d && d->lun == dev->lun) { 173 error_setg(errp, "no free target"); 174 return; 175 } 176 dev->id = id; 177 } else if (dev->lun == -1) { 178 int lun = -1; 179 do { 180 d = scsi_device_find(bus, dev->channel, dev->id, ++lun); 181 } while (d && d->lun == lun && lun < bus->info->max_lun); 182 if (d && d->lun == lun) { 183 error_setg(errp, "no free lun"); 184 return; 185 } 186 dev->lun = lun; 187 } else { 188 d = scsi_device_find(bus, dev->channel, dev->id, dev->lun); 189 assert(d); 190 if (d->lun == dev->lun && dev != d) { 191 error_setg(errp, "lun already used by '%s'", d->qdev.id); 192 return; 193 } 194 } 195 196 QTAILQ_INIT(&dev->requests); 197 scsi_device_realize(dev, &local_err); 198 if (local_err) { 199 error_propagate(errp, local_err); 200 return; 201 } 202 dev->vmsentry = qemu_add_vm_change_state_handler(scsi_dma_restart_cb, 203 dev); 204 } 205 206 static void scsi_qdev_unrealize(DeviceState *qdev, Error **errp) 207 { 208 SCSIDevice *dev = SCSI_DEVICE(qdev); 209 210 if (dev->vmsentry) { 211 qemu_del_vm_change_state_handler(dev->vmsentry); 212 } 213 214 scsi_device_purge_requests(dev, SENSE_CODE(NO_SENSE)); 215 blockdev_mark_auto_del(dev->conf.blk); 216 } 217 218 /* handle legacy '-drive if=scsi,...' cmd line args */ 219 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockBackend *blk, 220 int unit, bool removable, int bootindex, 221 const char *serial, Error **errp) 222 { 223 const char *driver; 224 DeviceState *dev; 225 Error *err = NULL; 226 227 driver = blk_is_sg(blk) ? "scsi-generic" : "scsi-disk"; 228 dev = qdev_create(&bus->qbus, driver); 229 qdev_prop_set_uint32(dev, "scsi-id", unit); 230 if (bootindex >= 0) { 231 object_property_set_int(OBJECT(dev), bootindex, "bootindex", 232 &error_abort); 233 } 234 if (object_property_find(OBJECT(dev), "removable", NULL)) { 235 qdev_prop_set_bit(dev, "removable", removable); 236 } 237 if (serial && object_property_find(OBJECT(dev), "serial", NULL)) { 238 qdev_prop_set_string(dev, "serial", serial); 239 } 240 if (qdev_prop_set_drive(dev, "drive", blk) < 0) { 241 error_setg(errp, "Setting drive property failed"); 242 object_unparent(OBJECT(dev)); 243 return NULL; 244 } 245 object_property_set_bool(OBJECT(dev), true, "realized", &err); 246 if (err != NULL) { 247 error_propagate(errp, err); 248 object_unparent(OBJECT(dev)); 249 return NULL; 250 } 251 return SCSI_DEVICE(dev); 252 } 253 254 void scsi_bus_legacy_handle_cmdline(SCSIBus *bus, Error **errp) 255 { 256 Location loc; 257 DriveInfo *dinfo; 258 int unit; 259 Error *err = NULL; 260 261 loc_push_none(&loc); 262 for (unit = 0; unit <= bus->info->max_target; unit++) { 263 dinfo = drive_get(IF_SCSI, bus->busnr, unit); 264 if (dinfo == NULL) { 265 continue; 266 } 267 qemu_opts_loc_restore(dinfo->opts); 268 scsi_bus_legacy_add_drive(bus, blk_by_legacy_dinfo(dinfo), 269 unit, false, -1, NULL, &err); 270 if (err != NULL) { 271 error_report("%s", error_get_pretty(err)); 272 error_propagate(errp, err); 273 break; 274 } 275 } 276 loc_pop(&loc); 277 } 278 279 static int32_t scsi_invalid_field(SCSIRequest *req, uint8_t *buf) 280 { 281 scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD)); 282 scsi_req_complete(req, CHECK_CONDITION); 283 return 0; 284 } 285 286 static const struct SCSIReqOps reqops_invalid_field = { 287 .size = sizeof(SCSIRequest), 288 .send_command = scsi_invalid_field 289 }; 290 291 /* SCSIReqOps implementation for invalid commands. */ 292 293 static int32_t scsi_invalid_command(SCSIRequest *req, uint8_t *buf) 294 { 295 scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE)); 296 scsi_req_complete(req, CHECK_CONDITION); 297 return 0; 298 } 299 300 static const struct SCSIReqOps reqops_invalid_opcode = { 301 .size = sizeof(SCSIRequest), 302 .send_command = scsi_invalid_command 303 }; 304 305 /* SCSIReqOps implementation for unit attention conditions. */ 306 307 static int32_t scsi_unit_attention(SCSIRequest *req, uint8_t *buf) 308 { 309 if (req->dev->unit_attention.key == UNIT_ATTENTION) { 310 scsi_req_build_sense(req, req->dev->unit_attention); 311 } else if (req->bus->unit_attention.key == UNIT_ATTENTION) { 312 scsi_req_build_sense(req, req->bus->unit_attention); 313 } 314 scsi_req_complete(req, CHECK_CONDITION); 315 return 0; 316 } 317 318 static const struct SCSIReqOps reqops_unit_attention = { 319 .size = sizeof(SCSIRequest), 320 .send_command = scsi_unit_attention 321 }; 322 323 /* SCSIReqOps implementation for REPORT LUNS and for commands sent to 324 an invalid LUN. */ 325 326 typedef struct SCSITargetReq SCSITargetReq; 327 328 struct SCSITargetReq { 329 SCSIRequest req; 330 int len; 331 uint8_t *buf; 332 int buf_len; 333 }; 334 335 static void store_lun(uint8_t *outbuf, int lun) 336 { 337 if (lun < 256) { 338 outbuf[1] = lun; 339 return; 340 } 341 outbuf[1] = (lun & 255); 342 outbuf[0] = (lun >> 8) | 0x40; 343 } 344 345 static bool scsi_target_emulate_report_luns(SCSITargetReq *r) 346 { 347 BusChild *kid; 348 int i, len, n; 349 int channel, id; 350 bool found_lun0; 351 352 if (r->req.cmd.xfer < 16) { 353 return false; 354 } 355 if (r->req.cmd.buf[2] > 2) { 356 return false; 357 } 358 channel = r->req.dev->channel; 359 id = r->req.dev->id; 360 found_lun0 = false; 361 n = 0; 362 QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) { 363 DeviceState *qdev = kid->child; 364 SCSIDevice *dev = SCSI_DEVICE(qdev); 365 366 if (dev->channel == channel && dev->id == id) { 367 if (dev->lun == 0) { 368 found_lun0 = true; 369 } 370 n += 8; 371 } 372 } 373 if (!found_lun0) { 374 n += 8; 375 } 376 377 scsi_target_alloc_buf(&r->req, n + 8); 378 379 len = MIN(n + 8, r->req.cmd.xfer & ~7); 380 memset(r->buf, 0, len); 381 stl_be_p(&r->buf[0], n); 382 i = found_lun0 ? 8 : 16; 383 QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) { 384 DeviceState *qdev = kid->child; 385 SCSIDevice *dev = SCSI_DEVICE(qdev); 386 387 if (dev->channel == channel && dev->id == id) { 388 store_lun(&r->buf[i], dev->lun); 389 i += 8; 390 } 391 } 392 assert(i == n + 8); 393 r->len = len; 394 return true; 395 } 396 397 static bool scsi_target_emulate_inquiry(SCSITargetReq *r) 398 { 399 assert(r->req.dev->lun != r->req.lun); 400 401 scsi_target_alloc_buf(&r->req, SCSI_INQUIRY_LEN); 402 403 if (r->req.cmd.buf[1] & 0x2) { 404 /* Command support data - optional, not implemented */ 405 return false; 406 } 407 408 if (r->req.cmd.buf[1] & 0x1) { 409 /* Vital product data */ 410 uint8_t page_code = r->req.cmd.buf[2]; 411 r->buf[r->len++] = page_code ; /* this page */ 412 r->buf[r->len++] = 0x00; 413 414 switch (page_code) { 415 case 0x00: /* Supported page codes, mandatory */ 416 { 417 int pages; 418 pages = r->len++; 419 r->buf[r->len++] = 0x00; /* list of supported pages (this page) */ 420 r->buf[pages] = r->len - pages - 1; /* number of pages */ 421 break; 422 } 423 default: 424 return false; 425 } 426 /* done with EVPD */ 427 assert(r->len < r->buf_len); 428 r->len = MIN(r->req.cmd.xfer, r->len); 429 return true; 430 } 431 432 /* Standard INQUIRY data */ 433 if (r->req.cmd.buf[2] != 0) { 434 return false; 435 } 436 437 /* PAGE CODE == 0 */ 438 r->len = MIN(r->req.cmd.xfer, SCSI_INQUIRY_LEN); 439 memset(r->buf, 0, r->len); 440 if (r->req.lun != 0) { 441 r->buf[0] = TYPE_NO_LUN; 442 } else { 443 r->buf[0] = TYPE_NOT_PRESENT | TYPE_INACTIVE; 444 r->buf[2] = 5; /* Version */ 445 r->buf[3] = 2 | 0x10; /* HiSup, response data format */ 446 r->buf[4] = r->len - 5; /* Additional Length = (Len - 1) - 4 */ 447 r->buf[7] = 0x10 | (r->req.bus->info->tcq ? 0x02 : 0); /* Sync, TCQ. */ 448 memcpy(&r->buf[8], "QEMU ", 8); 449 memcpy(&r->buf[16], "QEMU TARGET ", 16); 450 pstrcpy((char *) &r->buf[32], 4, qemu_get_version()); 451 } 452 return true; 453 } 454 455 static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf) 456 { 457 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 458 459 switch (buf[0]) { 460 case REPORT_LUNS: 461 if (!scsi_target_emulate_report_luns(r)) { 462 goto illegal_request; 463 } 464 break; 465 case INQUIRY: 466 if (!scsi_target_emulate_inquiry(r)) { 467 goto illegal_request; 468 } 469 break; 470 case REQUEST_SENSE: 471 scsi_target_alloc_buf(&r->req, SCSI_SENSE_LEN); 472 r->len = scsi_device_get_sense(r->req.dev, r->buf, 473 MIN(req->cmd.xfer, r->buf_len), 474 (req->cmd.buf[1] & 1) == 0); 475 if (r->req.dev->sense_is_ua) { 476 scsi_device_unit_attention_reported(req->dev); 477 r->req.dev->sense_len = 0; 478 r->req.dev->sense_is_ua = false; 479 } 480 break; 481 case TEST_UNIT_READY: 482 break; 483 default: 484 scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED)); 485 scsi_req_complete(req, CHECK_CONDITION); 486 return 0; 487 illegal_request: 488 scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD)); 489 scsi_req_complete(req, CHECK_CONDITION); 490 return 0; 491 } 492 493 if (!r->len) { 494 scsi_req_complete(req, GOOD); 495 } 496 return r->len; 497 } 498 499 static void scsi_target_read_data(SCSIRequest *req) 500 { 501 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 502 uint32_t n; 503 504 n = r->len; 505 if (n > 0) { 506 r->len = 0; 507 scsi_req_data(&r->req, n); 508 } else { 509 scsi_req_complete(&r->req, GOOD); 510 } 511 } 512 513 static uint8_t *scsi_target_get_buf(SCSIRequest *req) 514 { 515 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 516 517 return r->buf; 518 } 519 520 static uint8_t *scsi_target_alloc_buf(SCSIRequest *req, size_t len) 521 { 522 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 523 524 r->buf = g_malloc(len); 525 r->buf_len = len; 526 527 return r->buf; 528 } 529 530 static void scsi_target_free_buf(SCSIRequest *req) 531 { 532 SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); 533 534 g_free(r->buf); 535 } 536 537 static const struct SCSIReqOps reqops_target_command = { 538 .size = sizeof(SCSITargetReq), 539 .send_command = scsi_target_send_command, 540 .read_data = scsi_target_read_data, 541 .get_buf = scsi_target_get_buf, 542 .free_req = scsi_target_free_buf, 543 }; 544 545 546 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d, 547 uint32_t tag, uint32_t lun, void *hba_private) 548 { 549 SCSIRequest *req; 550 SCSIBus *bus = scsi_bus_from_device(d); 551 BusState *qbus = BUS(bus); 552 const int memset_off = offsetof(SCSIRequest, sense) 553 + sizeof(req->sense); 554 555 req = g_slice_alloc(reqops->size); 556 memset((uint8_t *)req + memset_off, 0, reqops->size - memset_off); 557 req->refcount = 1; 558 req->bus = bus; 559 req->dev = d; 560 req->tag = tag; 561 req->lun = lun; 562 req->hba_private = hba_private; 563 req->status = -1; 564 req->ops = reqops; 565 object_ref(OBJECT(d)); 566 object_ref(OBJECT(qbus->parent)); 567 notifier_list_init(&req->cancel_notifiers); 568 trace_scsi_req_alloc(req->dev->id, req->lun, req->tag); 569 return req; 570 } 571 572 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun, 573 uint8_t *buf, void *hba_private) 574 { 575 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus); 576 const SCSIReqOps *ops; 577 SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(d); 578 SCSIRequest *req; 579 SCSICommand cmd = { .len = 0 }; 580 int ret; 581 582 if ((d->unit_attention.key == UNIT_ATTENTION || 583 bus->unit_attention.key == UNIT_ATTENTION) && 584 (buf[0] != INQUIRY && 585 buf[0] != REPORT_LUNS && 586 buf[0] != GET_CONFIGURATION && 587 buf[0] != GET_EVENT_STATUS_NOTIFICATION && 588 589 /* 590 * If we already have a pending unit attention condition, 591 * report this one before triggering another one. 592 */ 593 !(buf[0] == REQUEST_SENSE && d->sense_is_ua))) { 594 ops = &reqops_unit_attention; 595 } else if (lun != d->lun || 596 buf[0] == REPORT_LUNS || 597 (buf[0] == REQUEST_SENSE && d->sense_len)) { 598 ops = &reqops_target_command; 599 } else { 600 ops = NULL; 601 } 602 603 if (ops != NULL || !sc->parse_cdb) { 604 ret = scsi_req_parse_cdb(d, &cmd, buf); 605 } else { 606 ret = sc->parse_cdb(d, &cmd, buf, hba_private); 607 } 608 609 if (ret != 0) { 610 trace_scsi_req_parse_bad(d->id, lun, tag, buf[0]); 611 req = scsi_req_alloc(&reqops_invalid_opcode, d, tag, lun, hba_private); 612 } else { 613 assert(cmd.len != 0); 614 trace_scsi_req_parsed(d->id, lun, tag, buf[0], 615 cmd.mode, cmd.xfer); 616 if (cmd.lba != -1) { 617 trace_scsi_req_parsed_lba(d->id, lun, tag, buf[0], 618 cmd.lba); 619 } 620 621 if (cmd.xfer > INT32_MAX) { 622 req = scsi_req_alloc(&reqops_invalid_field, d, tag, lun, hba_private); 623 } else if (ops) { 624 req = scsi_req_alloc(ops, d, tag, lun, hba_private); 625 } else { 626 req = scsi_device_alloc_req(d, tag, lun, buf, hba_private); 627 } 628 } 629 630 req->cmd = cmd; 631 req->resid = req->cmd.xfer; 632 633 switch (buf[0]) { 634 case INQUIRY: 635 trace_scsi_inquiry(d->id, lun, tag, cmd.buf[1], cmd.buf[2]); 636 break; 637 case TEST_UNIT_READY: 638 trace_scsi_test_unit_ready(d->id, lun, tag); 639 break; 640 case REPORT_LUNS: 641 trace_scsi_report_luns(d->id, lun, tag); 642 break; 643 case REQUEST_SENSE: 644 trace_scsi_request_sense(d->id, lun, tag); 645 break; 646 default: 647 break; 648 } 649 650 return req; 651 } 652 653 uint8_t *scsi_req_get_buf(SCSIRequest *req) 654 { 655 return req->ops->get_buf(req); 656 } 657 658 static void scsi_clear_unit_attention(SCSIRequest *req) 659 { 660 SCSISense *ua; 661 if (req->dev->unit_attention.key != UNIT_ATTENTION && 662 req->bus->unit_attention.key != UNIT_ATTENTION) { 663 return; 664 } 665 666 /* 667 * If an INQUIRY command enters the enabled command state, 668 * the device server shall [not] clear any unit attention condition; 669 * See also MMC-6, paragraphs 6.5 and 6.6.2. 670 */ 671 if (req->cmd.buf[0] == INQUIRY || 672 req->cmd.buf[0] == GET_CONFIGURATION || 673 req->cmd.buf[0] == GET_EVENT_STATUS_NOTIFICATION) { 674 return; 675 } 676 677 if (req->dev->unit_attention.key == UNIT_ATTENTION) { 678 ua = &req->dev->unit_attention; 679 } else { 680 ua = &req->bus->unit_attention; 681 } 682 683 /* 684 * If a REPORT LUNS command enters the enabled command state, [...] 685 * the device server shall clear any pending unit attention condition 686 * with an additional sense code of REPORTED LUNS DATA HAS CHANGED. 687 */ 688 if (req->cmd.buf[0] == REPORT_LUNS && 689 !(ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc && 690 ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq)) { 691 return; 692 } 693 694 *ua = SENSE_CODE(NO_SENSE); 695 } 696 697 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len) 698 { 699 int ret; 700 701 assert(len >= 14); 702 if (!req->sense_len) { 703 return 0; 704 } 705 706 ret = scsi_build_sense(req->sense, req->sense_len, buf, len, true); 707 708 /* 709 * FIXME: clearing unit attention conditions upon autosense should be done 710 * only if the UA_INTLCK_CTRL field in the Control mode page is set to 00b 711 * (SAM-5, 5.14). 712 * 713 * We assume UA_INTLCK_CTRL to be 00b for HBAs that support autosense, and 714 * 10b for HBAs that do not support it (do not call scsi_req_get_sense). 715 * Here we handle unit attention clearing for UA_INTLCK_CTRL == 00b. 716 */ 717 if (req->dev->sense_is_ua) { 718 scsi_device_unit_attention_reported(req->dev); 719 req->dev->sense_len = 0; 720 req->dev->sense_is_ua = false; 721 } 722 return ret; 723 } 724 725 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed) 726 { 727 return scsi_build_sense(dev->sense, dev->sense_len, buf, len, fixed); 728 } 729 730 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense) 731 { 732 trace_scsi_req_build_sense(req->dev->id, req->lun, req->tag, 733 sense.key, sense.asc, sense.ascq); 734 memset(req->sense, 0, 18); 735 req->sense[0] = 0x70; 736 req->sense[2] = sense.key; 737 req->sense[7] = 10; 738 req->sense[12] = sense.asc; 739 req->sense[13] = sense.ascq; 740 req->sense_len = 18; 741 } 742 743 static void scsi_req_enqueue_internal(SCSIRequest *req) 744 { 745 assert(!req->enqueued); 746 scsi_req_ref(req); 747 if (req->bus->info->get_sg_list) { 748 req->sg = req->bus->info->get_sg_list(req); 749 } else { 750 req->sg = NULL; 751 } 752 req->enqueued = true; 753 QTAILQ_INSERT_TAIL(&req->dev->requests, req, next); 754 } 755 756 int32_t scsi_req_enqueue(SCSIRequest *req) 757 { 758 int32_t rc; 759 760 assert(!req->retry); 761 scsi_req_enqueue_internal(req); 762 scsi_req_ref(req); 763 rc = req->ops->send_command(req, req->cmd.buf); 764 scsi_req_unref(req); 765 return rc; 766 } 767 768 static void scsi_req_dequeue(SCSIRequest *req) 769 { 770 trace_scsi_req_dequeue(req->dev->id, req->lun, req->tag); 771 req->retry = false; 772 if (req->enqueued) { 773 QTAILQ_REMOVE(&req->dev->requests, req, next); 774 req->enqueued = false; 775 scsi_req_unref(req); 776 } 777 } 778 779 static int scsi_get_performance_length(int num_desc, int type, int data_type) 780 { 781 /* MMC-6, paragraph 6.7. */ 782 switch (type) { 783 case 0: 784 if ((data_type & 3) == 0) { 785 /* Each descriptor is as in Table 295 - Nominal performance. */ 786 return 16 * num_desc + 8; 787 } else { 788 /* Each descriptor is as in Table 296 - Exceptions. */ 789 return 6 * num_desc + 8; 790 } 791 case 1: 792 case 4: 793 case 5: 794 return 8 * num_desc + 8; 795 case 2: 796 return 2048 * num_desc + 8; 797 case 3: 798 return 16 * num_desc + 8; 799 default: 800 return 8; 801 } 802 } 803 804 static int ata_passthrough_xfer_unit(SCSIDevice *dev, uint8_t *buf) 805 { 806 int byte_block = (buf[2] >> 2) & 0x1; 807 int type = (buf[2] >> 4) & 0x1; 808 int xfer_unit; 809 810 if (byte_block) { 811 if (type) { 812 xfer_unit = dev->blocksize; 813 } else { 814 xfer_unit = 512; 815 } 816 } else { 817 xfer_unit = 1; 818 } 819 820 return xfer_unit; 821 } 822 823 static int ata_passthrough_12_xfer(SCSIDevice *dev, uint8_t *buf) 824 { 825 int length = buf[2] & 0x3; 826 int xfer; 827 int unit = ata_passthrough_xfer_unit(dev, buf); 828 829 switch (length) { 830 case 0: 831 case 3: /* USB-specific. */ 832 default: 833 xfer = 0; 834 break; 835 case 1: 836 xfer = buf[3]; 837 break; 838 case 2: 839 xfer = buf[4]; 840 break; 841 } 842 843 return xfer * unit; 844 } 845 846 static int ata_passthrough_16_xfer(SCSIDevice *dev, uint8_t *buf) 847 { 848 int extend = buf[1] & 0x1; 849 int length = buf[2] & 0x3; 850 int xfer; 851 int unit = ata_passthrough_xfer_unit(dev, buf); 852 853 switch (length) { 854 case 0: 855 case 3: /* USB-specific. */ 856 default: 857 xfer = 0; 858 break; 859 case 1: 860 xfer = buf[4]; 861 xfer |= (extend ? buf[3] << 8 : 0); 862 break; 863 case 2: 864 xfer = buf[6]; 865 xfer |= (extend ? buf[5] << 8 : 0); 866 break; 867 } 868 869 return xfer * unit; 870 } 871 872 uint32_t scsi_data_cdb_xfer(uint8_t *buf) 873 { 874 if ((buf[0] >> 5) == 0 && buf[4] == 0) { 875 return 256; 876 } else { 877 return scsi_cdb_xfer(buf); 878 } 879 } 880 881 uint32_t scsi_cdb_xfer(uint8_t *buf) 882 { 883 switch (buf[0] >> 5) { 884 case 0: 885 return buf[4]; 886 break; 887 case 1: 888 case 2: 889 return lduw_be_p(&buf[7]); 890 break; 891 case 4: 892 return ldl_be_p(&buf[10]) & 0xffffffffULL; 893 break; 894 case 5: 895 return ldl_be_p(&buf[6]) & 0xffffffffULL; 896 break; 897 default: 898 return -1; 899 } 900 } 901 902 static int scsi_req_xfer(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 903 { 904 cmd->xfer = scsi_cdb_xfer(buf); 905 switch (buf[0]) { 906 case TEST_UNIT_READY: 907 case REWIND: 908 case START_STOP: 909 case SET_CAPACITY: 910 case WRITE_FILEMARKS: 911 case WRITE_FILEMARKS_16: 912 case SPACE: 913 case RESERVE: 914 case RELEASE: 915 case ERASE: 916 case ALLOW_MEDIUM_REMOVAL: 917 case SEEK_10: 918 case SYNCHRONIZE_CACHE: 919 case SYNCHRONIZE_CACHE_16: 920 case LOCATE_16: 921 case LOCK_UNLOCK_CACHE: 922 case SET_CD_SPEED: 923 case SET_LIMITS: 924 case WRITE_LONG_10: 925 case UPDATE_BLOCK: 926 case RESERVE_TRACK: 927 case SET_READ_AHEAD: 928 case PRE_FETCH: 929 case PRE_FETCH_16: 930 case ALLOW_OVERWRITE: 931 cmd->xfer = 0; 932 break; 933 case VERIFY_10: 934 case VERIFY_12: 935 case VERIFY_16: 936 if ((buf[1] & 2) == 0) { 937 cmd->xfer = 0; 938 } else if ((buf[1] & 4) != 0) { 939 cmd->xfer = 1; 940 } 941 cmd->xfer *= dev->blocksize; 942 break; 943 case MODE_SENSE: 944 break; 945 case WRITE_SAME_10: 946 case WRITE_SAME_16: 947 cmd->xfer = dev->blocksize; 948 break; 949 case READ_CAPACITY_10: 950 cmd->xfer = 8; 951 break; 952 case READ_BLOCK_LIMITS: 953 cmd->xfer = 6; 954 break; 955 case SEND_VOLUME_TAG: 956 /* GPCMD_SET_STREAMING from multimedia commands. */ 957 if (dev->type == TYPE_ROM) { 958 cmd->xfer = buf[10] | (buf[9] << 8); 959 } else { 960 cmd->xfer = buf[9] | (buf[8] << 8); 961 } 962 break; 963 case WRITE_6: 964 /* length 0 means 256 blocks */ 965 if (cmd->xfer == 0) { 966 cmd->xfer = 256; 967 } 968 /* fall through */ 969 case WRITE_10: 970 case WRITE_VERIFY_10: 971 case WRITE_12: 972 case WRITE_VERIFY_12: 973 case WRITE_16: 974 case WRITE_VERIFY_16: 975 cmd->xfer *= dev->blocksize; 976 break; 977 case READ_6: 978 case READ_REVERSE: 979 /* length 0 means 256 blocks */ 980 if (cmd->xfer == 0) { 981 cmd->xfer = 256; 982 } 983 /* fall through */ 984 case READ_10: 985 case RECOVER_BUFFERED_DATA: 986 case READ_12: 987 case READ_16: 988 cmd->xfer *= dev->blocksize; 989 break; 990 case FORMAT_UNIT: 991 /* MMC mandates the parameter list to be 12-bytes long. Parameters 992 * for block devices are restricted to the header right now. */ 993 if (dev->type == TYPE_ROM && (buf[1] & 16)) { 994 cmd->xfer = 12; 995 } else { 996 cmd->xfer = (buf[1] & 16) == 0 ? 0 : (buf[1] & 32 ? 8 : 4); 997 } 998 break; 999 case INQUIRY: 1000 case RECEIVE_DIAGNOSTIC: 1001 case SEND_DIAGNOSTIC: 1002 cmd->xfer = buf[4] | (buf[3] << 8); 1003 break; 1004 case READ_CD: 1005 case READ_BUFFER: 1006 case WRITE_BUFFER: 1007 case SEND_CUE_SHEET: 1008 cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16); 1009 break; 1010 case PERSISTENT_RESERVE_OUT: 1011 cmd->xfer = ldl_be_p(&buf[5]) & 0xffffffffULL; 1012 break; 1013 case ERASE_12: 1014 if (dev->type == TYPE_ROM) { 1015 /* MMC command GET PERFORMANCE. */ 1016 cmd->xfer = scsi_get_performance_length(buf[9] | (buf[8] << 8), 1017 buf[10], buf[1] & 0x1f); 1018 } 1019 break; 1020 case MECHANISM_STATUS: 1021 case READ_DVD_STRUCTURE: 1022 case SEND_DVD_STRUCTURE: 1023 case MAINTENANCE_OUT: 1024 case MAINTENANCE_IN: 1025 if (dev->type == TYPE_ROM) { 1026 /* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */ 1027 cmd->xfer = buf[9] | (buf[8] << 8); 1028 } 1029 break; 1030 case ATA_PASSTHROUGH_12: 1031 if (dev->type == TYPE_ROM) { 1032 /* BLANK command of MMC */ 1033 cmd->xfer = 0; 1034 } else { 1035 cmd->xfer = ata_passthrough_12_xfer(dev, buf); 1036 } 1037 break; 1038 case ATA_PASSTHROUGH_16: 1039 cmd->xfer = ata_passthrough_16_xfer(dev, buf); 1040 break; 1041 } 1042 return 0; 1043 } 1044 1045 static int scsi_req_stream_xfer(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1046 { 1047 switch (buf[0]) { 1048 /* stream commands */ 1049 case ERASE_12: 1050 case ERASE_16: 1051 cmd->xfer = 0; 1052 break; 1053 case READ_6: 1054 case READ_REVERSE: 1055 case RECOVER_BUFFERED_DATA: 1056 case WRITE_6: 1057 cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16); 1058 if (buf[1] & 0x01) { /* fixed */ 1059 cmd->xfer *= dev->blocksize; 1060 } 1061 break; 1062 case READ_16: 1063 case READ_REVERSE_16: 1064 case VERIFY_16: 1065 case WRITE_16: 1066 cmd->xfer = buf[14] | (buf[13] << 8) | (buf[12] << 16); 1067 if (buf[1] & 0x01) { /* fixed */ 1068 cmd->xfer *= dev->blocksize; 1069 } 1070 break; 1071 case REWIND: 1072 case LOAD_UNLOAD: 1073 cmd->xfer = 0; 1074 break; 1075 case SPACE_16: 1076 cmd->xfer = buf[13] | (buf[12] << 8); 1077 break; 1078 case READ_POSITION: 1079 switch (buf[1] & 0x1f) /* operation code */ { 1080 case SHORT_FORM_BLOCK_ID: 1081 case SHORT_FORM_VENDOR_SPECIFIC: 1082 cmd->xfer = 20; 1083 break; 1084 case LONG_FORM: 1085 cmd->xfer = 32; 1086 break; 1087 case EXTENDED_FORM: 1088 cmd->xfer = buf[8] | (buf[7] << 8); 1089 break; 1090 default: 1091 return -1; 1092 } 1093 1094 break; 1095 case FORMAT_UNIT: 1096 cmd->xfer = buf[4] | (buf[3] << 8); 1097 break; 1098 /* generic commands */ 1099 default: 1100 return scsi_req_xfer(cmd, dev, buf); 1101 } 1102 return 0; 1103 } 1104 1105 static int scsi_req_medium_changer_xfer(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) 1106 { 1107 switch (buf[0]) { 1108 /* medium changer commands */ 1109 case EXCHANGE_MEDIUM: 1110 case INITIALIZE_ELEMENT_STATUS: 1111 case INITIALIZE_ELEMENT_STATUS_WITH_RANGE: 1112 case MOVE_MEDIUM: 1113 case POSITION_TO_ELEMENT: 1114 cmd->xfer = 0; 1115 break; 1116 case READ_ELEMENT_STATUS: 1117 cmd->xfer = buf[9] | (buf[8] << 8) | (buf[7] << 16); 1118 break; 1119 1120 /* generic commands */ 1121 default: 1122 return scsi_req_xfer(cmd, dev, buf); 1123 } 1124 return 0; 1125 } 1126 1127 1128 static void scsi_cmd_xfer_mode(SCSICommand *cmd) 1129 { 1130 if (!cmd->xfer) { 1131 cmd->mode = SCSI_XFER_NONE; 1132 return; 1133 } 1134 switch (cmd->buf[0]) { 1135 case WRITE_6: 1136 case WRITE_10: 1137 case WRITE_VERIFY_10: 1138 case WRITE_12: 1139 case WRITE_VERIFY_12: 1140 case WRITE_16: 1141 case WRITE_VERIFY_16: 1142 case VERIFY_10: 1143 case VERIFY_12: 1144 case VERIFY_16: 1145 case COPY: 1146 case COPY_VERIFY: 1147 case COMPARE: 1148 case CHANGE_DEFINITION: 1149 case LOG_SELECT: 1150 case MODE_SELECT: 1151 case MODE_SELECT_10: 1152 case SEND_DIAGNOSTIC: 1153 case WRITE_BUFFER: 1154 case FORMAT_UNIT: 1155 case REASSIGN_BLOCKS: 1156 case SEARCH_EQUAL: 1157 case SEARCH_HIGH: 1158 case SEARCH_LOW: 1159 case UPDATE_BLOCK: 1160 case WRITE_LONG_10: 1161 case WRITE_SAME_10: 1162 case WRITE_SAME_16: 1163 case UNMAP: 1164 case SEARCH_HIGH_12: 1165 case SEARCH_EQUAL_12: 1166 case SEARCH_LOW_12: 1167 case MEDIUM_SCAN: 1168 case SEND_VOLUME_TAG: 1169 case SEND_CUE_SHEET: 1170 case SEND_DVD_STRUCTURE: 1171 case PERSISTENT_RESERVE_OUT: 1172 case MAINTENANCE_OUT: 1173 cmd->mode = SCSI_XFER_TO_DEV; 1174 break; 1175 case ATA_PASSTHROUGH_12: 1176 case ATA_PASSTHROUGH_16: 1177 /* T_DIR */ 1178 cmd->mode = (cmd->buf[2] & 0x8) ? 1179 SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV; 1180 break; 1181 default: 1182 cmd->mode = SCSI_XFER_FROM_DEV; 1183 break; 1184 } 1185 } 1186 1187 static uint64_t scsi_cmd_lba(SCSICommand *cmd) 1188 { 1189 uint8_t *buf = cmd->buf; 1190 uint64_t lba; 1191 1192 switch (buf[0] >> 5) { 1193 case 0: 1194 lba = ldl_be_p(&buf[0]) & 0x1fffff; 1195 break; 1196 case 1: 1197 case 2: 1198 case 5: 1199 lba = ldl_be_p(&buf[2]) & 0xffffffffULL; 1200 break; 1201 case 4: 1202 lba = ldq_be_p(&buf[2]); 1203 break; 1204 default: 1205 lba = -1; 1206 1207 } 1208 return lba; 1209 } 1210 1211 int scsi_cdb_length(uint8_t *buf) { 1212 int cdb_len; 1213 1214 switch (buf[0] >> 5) { 1215 case 0: 1216 cdb_len = 6; 1217 break; 1218 case 1: 1219 case 2: 1220 cdb_len = 10; 1221 break; 1222 case 4: 1223 cdb_len = 16; 1224 break; 1225 case 5: 1226 cdb_len = 12; 1227 break; 1228 default: 1229 cdb_len = -1; 1230 } 1231 return cdb_len; 1232 } 1233 1234 int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf) 1235 { 1236 int rc; 1237 1238 cmd->lba = -1; 1239 cmd->len = scsi_cdb_length(buf); 1240 1241 switch (dev->type) { 1242 case TYPE_TAPE: 1243 rc = scsi_req_stream_xfer(cmd, dev, buf); 1244 break; 1245 case TYPE_MEDIUM_CHANGER: 1246 rc = scsi_req_medium_changer_xfer(cmd, dev, buf); 1247 break; 1248 default: 1249 rc = scsi_req_xfer(cmd, dev, buf); 1250 break; 1251 } 1252 1253 if (rc != 0) 1254 return rc; 1255 1256 memcpy(cmd->buf, buf, cmd->len); 1257 scsi_cmd_xfer_mode(cmd); 1258 cmd->lba = scsi_cmd_lba(cmd); 1259 return 0; 1260 } 1261 1262 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense) 1263 { 1264 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); 1265 1266 scsi_device_set_ua(dev, sense); 1267 if (bus->info->change) { 1268 bus->info->change(bus, dev, sense); 1269 } 1270 } 1271 1272 /* 1273 * Predefined sense codes 1274 */ 1275 1276 /* No sense data available */ 1277 const struct SCSISense sense_code_NO_SENSE = { 1278 .key = NO_SENSE , .asc = 0x00 , .ascq = 0x00 1279 }; 1280 1281 /* LUN not ready, Manual intervention required */ 1282 const struct SCSISense sense_code_LUN_NOT_READY = { 1283 .key = NOT_READY, .asc = 0x04, .ascq = 0x03 1284 }; 1285 1286 /* LUN not ready, Medium not present */ 1287 const struct SCSISense sense_code_NO_MEDIUM = { 1288 .key = NOT_READY, .asc = 0x3a, .ascq = 0x00 1289 }; 1290 1291 /* LUN not ready, medium removal prevented */ 1292 const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = { 1293 .key = NOT_READY, .asc = 0x53, .ascq = 0x02 1294 }; 1295 1296 /* Hardware error, internal target failure */ 1297 const struct SCSISense sense_code_TARGET_FAILURE = { 1298 .key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00 1299 }; 1300 1301 /* Illegal request, invalid command operation code */ 1302 const struct SCSISense sense_code_INVALID_OPCODE = { 1303 .key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00 1304 }; 1305 1306 /* Illegal request, LBA out of range */ 1307 const struct SCSISense sense_code_LBA_OUT_OF_RANGE = { 1308 .key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00 1309 }; 1310 1311 /* Illegal request, Invalid field in CDB */ 1312 const struct SCSISense sense_code_INVALID_FIELD = { 1313 .key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00 1314 }; 1315 1316 /* Illegal request, Invalid field in parameter list */ 1317 const struct SCSISense sense_code_INVALID_PARAM = { 1318 .key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x00 1319 }; 1320 1321 /* Illegal request, Parameter list length error */ 1322 const struct SCSISense sense_code_INVALID_PARAM_LEN = { 1323 .key = ILLEGAL_REQUEST, .asc = 0x1a, .ascq = 0x00 1324 }; 1325 1326 /* Illegal request, LUN not supported */ 1327 const struct SCSISense sense_code_LUN_NOT_SUPPORTED = { 1328 .key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00 1329 }; 1330 1331 /* Illegal request, Saving parameters not supported */ 1332 const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = { 1333 .key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00 1334 }; 1335 1336 /* Illegal request, Incompatible medium installed */ 1337 const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = { 1338 .key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00 1339 }; 1340 1341 /* Illegal request, medium removal prevented */ 1342 const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = { 1343 .key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x02 1344 }; 1345 1346 /* Illegal request, Invalid Transfer Tag */ 1347 const struct SCSISense sense_code_INVALID_TAG = { 1348 .key = ILLEGAL_REQUEST, .asc = 0x4b, .ascq = 0x01 1349 }; 1350 1351 /* Command aborted, I/O process terminated */ 1352 const struct SCSISense sense_code_IO_ERROR = { 1353 .key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06 1354 }; 1355 1356 /* Command aborted, I_T Nexus loss occurred */ 1357 const struct SCSISense sense_code_I_T_NEXUS_LOSS = { 1358 .key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07 1359 }; 1360 1361 /* Command aborted, Logical Unit failure */ 1362 const struct SCSISense sense_code_LUN_FAILURE = { 1363 .key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01 1364 }; 1365 1366 /* Command aborted, Overlapped Commands Attempted */ 1367 const struct SCSISense sense_code_OVERLAPPED_COMMANDS = { 1368 .key = ABORTED_COMMAND, .asc = 0x4e, .ascq = 0x00 1369 }; 1370 1371 /* Unit attention, Capacity data has changed */ 1372 const struct SCSISense sense_code_CAPACITY_CHANGED = { 1373 .key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09 1374 }; 1375 1376 /* Unit attention, Power on, reset or bus device reset occurred */ 1377 const struct SCSISense sense_code_RESET = { 1378 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00 1379 }; 1380 1381 /* Unit attention, No medium */ 1382 const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = { 1383 .key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00 1384 }; 1385 1386 /* Unit attention, Medium may have changed */ 1387 const struct SCSISense sense_code_MEDIUM_CHANGED = { 1388 .key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00 1389 }; 1390 1391 /* Unit attention, Reported LUNs data has changed */ 1392 const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = { 1393 .key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e 1394 }; 1395 1396 /* Unit attention, Device internal reset */ 1397 const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = { 1398 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04 1399 }; 1400 1401 /* Data Protection, Write Protected */ 1402 const struct SCSISense sense_code_WRITE_PROTECTED = { 1403 .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00 1404 }; 1405 1406 /* Data Protection, Space Allocation Failed Write Protect */ 1407 const struct SCSISense sense_code_SPACE_ALLOC_FAILED = { 1408 .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x07 1409 }; 1410 1411 /* 1412 * scsi_build_sense 1413 * 1414 * Convert between fixed and descriptor sense buffers 1415 */ 1416 int scsi_build_sense(uint8_t *in_buf, int in_len, 1417 uint8_t *buf, int len, bool fixed) 1418 { 1419 bool fixed_in; 1420 SCSISense sense; 1421 if (!fixed && len < 8) { 1422 return 0; 1423 } 1424 1425 if (in_len == 0) { 1426 sense.key = NO_SENSE; 1427 sense.asc = 0; 1428 sense.ascq = 0; 1429 } else { 1430 fixed_in = (in_buf[0] & 2) == 0; 1431 1432 if (fixed == fixed_in) { 1433 memcpy(buf, in_buf, MIN(len, in_len)); 1434 return MIN(len, in_len); 1435 } 1436 1437 if (fixed_in) { 1438 sense.key = in_buf[2]; 1439 sense.asc = in_buf[12]; 1440 sense.ascq = in_buf[13]; 1441 } else { 1442 sense.key = in_buf[1]; 1443 sense.asc = in_buf[2]; 1444 sense.ascq = in_buf[3]; 1445 } 1446 } 1447 1448 memset(buf, 0, len); 1449 if (fixed) { 1450 /* Return fixed format sense buffer */ 1451 buf[0] = 0x70; 1452 buf[2] = sense.key; 1453 buf[7] = 10; 1454 buf[12] = sense.asc; 1455 buf[13] = sense.ascq; 1456 return MIN(len, SCSI_SENSE_LEN); 1457 } else { 1458 /* Return descriptor format sense buffer */ 1459 buf[0] = 0x72; 1460 buf[1] = sense.key; 1461 buf[2] = sense.asc; 1462 buf[3] = sense.ascq; 1463 return 8; 1464 } 1465 } 1466 1467 const char *scsi_command_name(uint8_t cmd) 1468 { 1469 static const char *names[] = { 1470 [ TEST_UNIT_READY ] = "TEST_UNIT_READY", 1471 [ REWIND ] = "REWIND", 1472 [ REQUEST_SENSE ] = "REQUEST_SENSE", 1473 [ FORMAT_UNIT ] = "FORMAT_UNIT", 1474 [ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS", 1475 [ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS", 1476 /* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */ 1477 [ READ_6 ] = "READ_6", 1478 [ WRITE_6 ] = "WRITE_6", 1479 [ SET_CAPACITY ] = "SET_CAPACITY", 1480 [ READ_REVERSE ] = "READ_REVERSE", 1481 [ WRITE_FILEMARKS ] = "WRITE_FILEMARKS", 1482 [ SPACE ] = "SPACE", 1483 [ INQUIRY ] = "INQUIRY", 1484 [ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA", 1485 [ MAINTENANCE_IN ] = "MAINTENANCE_IN", 1486 [ MAINTENANCE_OUT ] = "MAINTENANCE_OUT", 1487 [ MODE_SELECT ] = "MODE_SELECT", 1488 [ RESERVE ] = "RESERVE", 1489 [ RELEASE ] = "RELEASE", 1490 [ COPY ] = "COPY", 1491 [ ERASE ] = "ERASE", 1492 [ MODE_SENSE ] = "MODE_SENSE", 1493 [ START_STOP ] = "START_STOP/LOAD_UNLOAD", 1494 /* LOAD_UNLOAD and START_STOP use the same operation code */ 1495 [ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC", 1496 [ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC", 1497 [ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL", 1498 [ READ_CAPACITY_10 ] = "READ_CAPACITY_10", 1499 [ READ_10 ] = "READ_10", 1500 [ WRITE_10 ] = "WRITE_10", 1501 [ SEEK_10 ] = "SEEK_10/POSITION_TO_ELEMENT", 1502 /* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */ 1503 [ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10", 1504 [ VERIFY_10 ] = "VERIFY_10", 1505 [ SEARCH_HIGH ] = "SEARCH_HIGH", 1506 [ SEARCH_EQUAL ] = "SEARCH_EQUAL", 1507 [ SEARCH_LOW ] = "SEARCH_LOW", 1508 [ SET_LIMITS ] = "SET_LIMITS", 1509 [ PRE_FETCH ] = "PRE_FETCH/READ_POSITION", 1510 /* READ_POSITION and PRE_FETCH use the same operation code */ 1511 [ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE", 1512 [ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE", 1513 [ READ_DEFECT_DATA ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE", 1514 /* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */ 1515 [ MEDIUM_SCAN ] = "MEDIUM_SCAN", 1516 [ COMPARE ] = "COMPARE", 1517 [ COPY_VERIFY ] = "COPY_VERIFY", 1518 [ WRITE_BUFFER ] = "WRITE_BUFFER", 1519 [ READ_BUFFER ] = "READ_BUFFER", 1520 [ UPDATE_BLOCK ] = "UPDATE_BLOCK", 1521 [ READ_LONG_10 ] = "READ_LONG_10", 1522 [ WRITE_LONG_10 ] = "WRITE_LONG_10", 1523 [ CHANGE_DEFINITION ] = "CHANGE_DEFINITION", 1524 [ WRITE_SAME_10 ] = "WRITE_SAME_10", 1525 [ UNMAP ] = "UNMAP", 1526 [ READ_TOC ] = "READ_TOC", 1527 [ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT", 1528 [ SANITIZE ] = "SANITIZE", 1529 [ GET_CONFIGURATION ] = "GET_CONFIGURATION", 1530 [ LOG_SELECT ] = "LOG_SELECT", 1531 [ LOG_SENSE ] = "LOG_SENSE", 1532 [ MODE_SELECT_10 ] = "MODE_SELECT_10", 1533 [ RESERVE_10 ] = "RESERVE_10", 1534 [ RELEASE_10 ] = "RELEASE_10", 1535 [ MODE_SENSE_10 ] = "MODE_SENSE_10", 1536 [ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN", 1537 [ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT", 1538 [ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16", 1539 [ EXTENDED_COPY ] = "EXTENDED_COPY", 1540 [ ATA_PASSTHROUGH_16 ] = "ATA_PASSTHROUGH_16", 1541 [ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN", 1542 [ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT", 1543 [ READ_16 ] = "READ_16", 1544 [ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE", 1545 [ WRITE_16 ] = "WRITE_16", 1546 [ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16", 1547 [ VERIFY_16 ] = "VERIFY_16", 1548 [ PRE_FETCH_16 ] = "PRE_FETCH_16", 1549 [ SYNCHRONIZE_CACHE_16 ] = "SPACE_16/SYNCHRONIZE_CACHE_16", 1550 /* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */ 1551 [ LOCATE_16 ] = "LOCATE_16", 1552 [ WRITE_SAME_16 ] = "ERASE_16/WRITE_SAME_16", 1553 /* ERASE_16 and WRITE_SAME_16 use the same operation code */ 1554 [ SERVICE_ACTION_IN_16 ] = "SERVICE_ACTION_IN_16", 1555 [ WRITE_LONG_16 ] = "WRITE_LONG_16", 1556 [ REPORT_LUNS ] = "REPORT_LUNS", 1557 [ ATA_PASSTHROUGH_12 ] = "BLANK/ATA_PASSTHROUGH_12", 1558 [ MOVE_MEDIUM ] = "MOVE_MEDIUM", 1559 [ EXCHANGE_MEDIUM ] = "EXCHANGE MEDIUM", 1560 [ READ_12 ] = "READ_12", 1561 [ WRITE_12 ] = "WRITE_12", 1562 [ ERASE_12 ] = "ERASE_12/GET_PERFORMANCE", 1563 /* ERASE_12 and GET_PERFORMANCE use the same operation code */ 1564 [ SERVICE_ACTION_IN_12 ] = "SERVICE_ACTION_IN_12", 1565 [ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12", 1566 [ VERIFY_12 ] = "VERIFY_12", 1567 [ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12", 1568 [ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12", 1569 [ SEARCH_LOW_12 ] = "SEARCH_LOW_12", 1570 [ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS", 1571 [ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG/SET_STREAMING", 1572 /* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */ 1573 [ READ_CD ] = "READ_CD", 1574 [ READ_DEFECT_DATA_12 ] = "READ_DEFECT_DATA_12", 1575 [ READ_DVD_STRUCTURE ] = "READ_DVD_STRUCTURE", 1576 [ RESERVE_TRACK ] = "RESERVE_TRACK", 1577 [ SEND_CUE_SHEET ] = "SEND_CUE_SHEET", 1578 [ SEND_DVD_STRUCTURE ] = "SEND_DVD_STRUCTURE", 1579 [ SET_CD_SPEED ] = "SET_CD_SPEED", 1580 [ SET_READ_AHEAD ] = "SET_READ_AHEAD", 1581 [ ALLOW_OVERWRITE ] = "ALLOW_OVERWRITE", 1582 [ MECHANISM_STATUS ] = "MECHANISM_STATUS", 1583 [ GET_EVENT_STATUS_NOTIFICATION ] = "GET_EVENT_STATUS_NOTIFICATION", 1584 [ READ_DISC_INFORMATION ] = "READ_DISC_INFORMATION", 1585 }; 1586 1587 if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL) 1588 return "*UNKNOWN*"; 1589 return names[cmd]; 1590 } 1591 1592 SCSIRequest *scsi_req_ref(SCSIRequest *req) 1593 { 1594 assert(req->refcount > 0); 1595 req->refcount++; 1596 return req; 1597 } 1598 1599 void scsi_req_unref(SCSIRequest *req) 1600 { 1601 assert(req->refcount > 0); 1602 if (--req->refcount == 0) { 1603 BusState *qbus = req->dev->qdev.parent_bus; 1604 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, qbus); 1605 1606 if (bus->info->free_request && req->hba_private) { 1607 bus->info->free_request(bus, req->hba_private); 1608 } 1609 if (req->ops->free_req) { 1610 req->ops->free_req(req); 1611 } 1612 object_unref(OBJECT(req->dev)); 1613 object_unref(OBJECT(qbus->parent)); 1614 g_slice_free1(req->ops->size, req); 1615 } 1616 } 1617 1618 /* Tell the device that we finished processing this chunk of I/O. It 1619 will start the next chunk or complete the command. */ 1620 void scsi_req_continue(SCSIRequest *req) 1621 { 1622 if (req->io_canceled) { 1623 trace_scsi_req_continue_canceled(req->dev->id, req->lun, req->tag); 1624 return; 1625 } 1626 trace_scsi_req_continue(req->dev->id, req->lun, req->tag); 1627 if (req->cmd.mode == SCSI_XFER_TO_DEV) { 1628 req->ops->write_data(req); 1629 } else { 1630 req->ops->read_data(req); 1631 } 1632 } 1633 1634 /* Called by the devices when data is ready for the HBA. The HBA should 1635 start a DMA operation to read or fill the device's data buffer. 1636 Once it completes, calling scsi_req_continue will restart I/O. */ 1637 void scsi_req_data(SCSIRequest *req, int len) 1638 { 1639 uint8_t *buf; 1640 if (req->io_canceled) { 1641 trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len); 1642 return; 1643 } 1644 trace_scsi_req_data(req->dev->id, req->lun, req->tag, len); 1645 assert(req->cmd.mode != SCSI_XFER_NONE); 1646 if (!req->sg) { 1647 req->resid -= len; 1648 req->bus->info->transfer_data(req, len); 1649 return; 1650 } 1651 1652 /* If the device calls scsi_req_data and the HBA specified a 1653 * scatter/gather list, the transfer has to happen in a single 1654 * step. */ 1655 assert(!req->dma_started); 1656 req->dma_started = true; 1657 1658 buf = scsi_req_get_buf(req); 1659 if (req->cmd.mode == SCSI_XFER_FROM_DEV) { 1660 req->resid = dma_buf_read(buf, len, req->sg); 1661 } else { 1662 req->resid = dma_buf_write(buf, len, req->sg); 1663 } 1664 scsi_req_continue(req); 1665 } 1666 1667 void scsi_req_print(SCSIRequest *req) 1668 { 1669 FILE *fp = stderr; 1670 int i; 1671 1672 fprintf(fp, "[%s id=%d] %s", 1673 req->dev->qdev.parent_bus->name, 1674 req->dev->id, 1675 scsi_command_name(req->cmd.buf[0])); 1676 for (i = 1; i < req->cmd.len; i++) { 1677 fprintf(fp, " 0x%02x", req->cmd.buf[i]); 1678 } 1679 switch (req->cmd.mode) { 1680 case SCSI_XFER_NONE: 1681 fprintf(fp, " - none\n"); 1682 break; 1683 case SCSI_XFER_FROM_DEV: 1684 fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer); 1685 break; 1686 case SCSI_XFER_TO_DEV: 1687 fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer); 1688 break; 1689 default: 1690 fprintf(fp, " - Oops\n"); 1691 break; 1692 } 1693 } 1694 1695 void scsi_req_complete(SCSIRequest *req, int status) 1696 { 1697 assert(req->status == -1); 1698 req->status = status; 1699 1700 assert(req->sense_len <= sizeof(req->sense)); 1701 if (status == GOOD) { 1702 req->sense_len = 0; 1703 } 1704 1705 if (req->sense_len) { 1706 memcpy(req->dev->sense, req->sense, req->sense_len); 1707 req->dev->sense_len = req->sense_len; 1708 req->dev->sense_is_ua = (req->ops == &reqops_unit_attention); 1709 } else { 1710 req->dev->sense_len = 0; 1711 req->dev->sense_is_ua = false; 1712 } 1713 1714 /* 1715 * Unit attention state is now stored in the device's sense buffer 1716 * if the HBA didn't do autosense. Clear the pending unit attention 1717 * flags. 1718 */ 1719 scsi_clear_unit_attention(req); 1720 1721 scsi_req_ref(req); 1722 scsi_req_dequeue(req); 1723 req->bus->info->complete(req, req->status, req->resid); 1724 1725 /* Cancelled requests might end up being completed instead of cancelled */ 1726 notifier_list_notify(&req->cancel_notifiers, req); 1727 scsi_req_unref(req); 1728 } 1729 1730 /* Called by the devices when the request is canceled. */ 1731 void scsi_req_cancel_complete(SCSIRequest *req) 1732 { 1733 assert(req->io_canceled); 1734 if (req->bus->info->cancel) { 1735 req->bus->info->cancel(req); 1736 } 1737 notifier_list_notify(&req->cancel_notifiers, req); 1738 scsi_req_unref(req); 1739 } 1740 1741 /* Cancel @req asynchronously. @notifier is added to @req's cancellation 1742 * notifier list, the bus will be notified the requests cancellation is 1743 * completed. 1744 * */ 1745 void scsi_req_cancel_async(SCSIRequest *req, Notifier *notifier) 1746 { 1747 trace_scsi_req_cancel(req->dev->id, req->lun, req->tag); 1748 if (notifier) { 1749 notifier_list_add(&req->cancel_notifiers, notifier); 1750 } 1751 if (req->io_canceled) { 1752 return; 1753 } 1754 scsi_req_ref(req); 1755 scsi_req_dequeue(req); 1756 req->io_canceled = true; 1757 if (req->aiocb) { 1758 blk_aio_cancel_async(req->aiocb); 1759 } 1760 } 1761 1762 void scsi_req_cancel(SCSIRequest *req) 1763 { 1764 trace_scsi_req_cancel(req->dev->id, req->lun, req->tag); 1765 if (!req->enqueued) { 1766 return; 1767 } 1768 scsi_req_ref(req); 1769 scsi_req_dequeue(req); 1770 req->io_canceled = true; 1771 if (req->aiocb) { 1772 blk_aio_cancel(req->aiocb); 1773 } 1774 } 1775 1776 static int scsi_ua_precedence(SCSISense sense) 1777 { 1778 if (sense.key != UNIT_ATTENTION) { 1779 return INT_MAX; 1780 } 1781 if (sense.asc == 0x29 && sense.ascq == 0x04) { 1782 /* DEVICE INTERNAL RESET goes with POWER ON OCCURRED */ 1783 return 1; 1784 } else if (sense.asc == 0x3F && sense.ascq == 0x01) { 1785 /* MICROCODE HAS BEEN CHANGED goes with SCSI BUS RESET OCCURRED */ 1786 return 2; 1787 } else if (sense.asc == 0x29 && (sense.ascq == 0x05 || sense.ascq == 0x06)) { 1788 /* These two go with "all others". */ 1789 ; 1790 } else if (sense.asc == 0x29 && sense.ascq <= 0x07) { 1791 /* POWER ON, RESET OR BUS DEVICE RESET OCCURRED = 0 1792 * POWER ON OCCURRED = 1 1793 * SCSI BUS RESET OCCURRED = 2 1794 * BUS DEVICE RESET FUNCTION OCCURRED = 3 1795 * I_T NEXUS LOSS OCCURRED = 7 1796 */ 1797 return sense.ascq; 1798 } else if (sense.asc == 0x2F && sense.ascq == 0x01) { 1799 /* COMMANDS CLEARED BY POWER LOSS NOTIFICATION */ 1800 return 8; 1801 } 1802 return (sense.asc << 8) | sense.ascq; 1803 } 1804 1805 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense) 1806 { 1807 int prec1, prec2; 1808 if (sense.key != UNIT_ATTENTION) { 1809 return; 1810 } 1811 trace_scsi_device_set_ua(sdev->id, sdev->lun, sense.key, 1812 sense.asc, sense.ascq); 1813 1814 /* 1815 * Override a pre-existing unit attention condition, except for a more 1816 * important reset condition. 1817 */ 1818 prec1 = scsi_ua_precedence(sdev->unit_attention); 1819 prec2 = scsi_ua_precedence(sense); 1820 if (prec2 < prec1) { 1821 sdev->unit_attention = sense; 1822 } 1823 } 1824 1825 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense) 1826 { 1827 SCSIRequest *req; 1828 1829 while (!QTAILQ_EMPTY(&sdev->requests)) { 1830 req = QTAILQ_FIRST(&sdev->requests); 1831 scsi_req_cancel(req); 1832 } 1833 1834 scsi_device_set_ua(sdev, sense); 1835 } 1836 1837 static char *scsibus_get_dev_path(DeviceState *dev) 1838 { 1839 SCSIDevice *d = DO_UPCAST(SCSIDevice, qdev, dev); 1840 DeviceState *hba = dev->parent_bus->parent; 1841 char *id; 1842 char *path; 1843 1844 id = qdev_get_dev_path(hba); 1845 if (id) { 1846 path = g_strdup_printf("%s/%d:%d:%d", id, d->channel, d->id, d->lun); 1847 } else { 1848 path = g_strdup_printf("%d:%d:%d", d->channel, d->id, d->lun); 1849 } 1850 g_free(id); 1851 return path; 1852 } 1853 1854 static char *scsibus_get_fw_dev_path(DeviceState *dev) 1855 { 1856 SCSIDevice *d = SCSI_DEVICE(dev); 1857 return g_strdup_printf("channel@%x/%s@%x,%x", d->channel, 1858 qdev_fw_name(dev), d->id, d->lun); 1859 } 1860 1861 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun) 1862 { 1863 BusChild *kid; 1864 SCSIDevice *target_dev = NULL; 1865 1866 QTAILQ_FOREACH_REVERSE(kid, &bus->qbus.children, ChildrenHead, sibling) { 1867 DeviceState *qdev = kid->child; 1868 SCSIDevice *dev = SCSI_DEVICE(qdev); 1869 1870 if (dev->channel == channel && dev->id == id) { 1871 if (dev->lun == lun) { 1872 return dev; 1873 } 1874 target_dev = dev; 1875 } 1876 } 1877 return target_dev; 1878 } 1879 1880 /* SCSI request list. For simplicity, pv points to the whole device */ 1881 1882 static void put_scsi_requests(QEMUFile *f, void *pv, size_t size) 1883 { 1884 SCSIDevice *s = pv; 1885 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); 1886 SCSIRequest *req; 1887 1888 QTAILQ_FOREACH(req, &s->requests, next) { 1889 assert(!req->io_canceled); 1890 assert(req->status == -1); 1891 assert(req->enqueued); 1892 1893 qemu_put_sbyte(f, req->retry ? 1 : 2); 1894 qemu_put_buffer(f, req->cmd.buf, sizeof(req->cmd.buf)); 1895 qemu_put_be32s(f, &req->tag); 1896 qemu_put_be32s(f, &req->lun); 1897 if (bus->info->save_request) { 1898 bus->info->save_request(f, req); 1899 } 1900 if (req->ops->save_request) { 1901 req->ops->save_request(f, req); 1902 } 1903 } 1904 qemu_put_sbyte(f, 0); 1905 } 1906 1907 static int get_scsi_requests(QEMUFile *f, void *pv, size_t size) 1908 { 1909 SCSIDevice *s = pv; 1910 SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); 1911 int8_t sbyte; 1912 1913 while ((sbyte = qemu_get_sbyte(f)) > 0) { 1914 uint8_t buf[SCSI_CMD_BUF_SIZE]; 1915 uint32_t tag; 1916 uint32_t lun; 1917 SCSIRequest *req; 1918 1919 qemu_get_buffer(f, buf, sizeof(buf)); 1920 qemu_get_be32s(f, &tag); 1921 qemu_get_be32s(f, &lun); 1922 req = scsi_req_new(s, tag, lun, buf, NULL); 1923 req->retry = (sbyte == 1); 1924 if (bus->info->load_request) { 1925 req->hba_private = bus->info->load_request(f, req); 1926 } 1927 if (req->ops->load_request) { 1928 req->ops->load_request(f, req); 1929 } 1930 1931 /* Just restart it later. */ 1932 scsi_req_enqueue_internal(req); 1933 1934 /* At this point, the request will be kept alive by the reference 1935 * added by scsi_req_enqueue_internal, so we can release our reference. 1936 * The HBA of course will add its own reference in the load_request 1937 * callback if it needs to hold on the SCSIRequest. 1938 */ 1939 scsi_req_unref(req); 1940 } 1941 1942 return 0; 1943 } 1944 1945 static const VMStateInfo vmstate_info_scsi_requests = { 1946 .name = "scsi-requests", 1947 .get = get_scsi_requests, 1948 .put = put_scsi_requests, 1949 }; 1950 1951 static bool scsi_sense_state_needed(void *opaque) 1952 { 1953 SCSIDevice *s = opaque; 1954 1955 return s->sense_len > SCSI_SENSE_BUF_SIZE_OLD; 1956 } 1957 1958 static const VMStateDescription vmstate_scsi_sense_state = { 1959 .name = "SCSIDevice/sense", 1960 .version_id = 1, 1961 .minimum_version_id = 1, 1962 .fields = (VMStateField[]) { 1963 VMSTATE_UINT8_SUB_ARRAY(sense, SCSIDevice, 1964 SCSI_SENSE_BUF_SIZE_OLD, 1965 SCSI_SENSE_BUF_SIZE - SCSI_SENSE_BUF_SIZE_OLD), 1966 VMSTATE_END_OF_LIST() 1967 } 1968 }; 1969 1970 const VMStateDescription vmstate_scsi_device = { 1971 .name = "SCSIDevice", 1972 .version_id = 1, 1973 .minimum_version_id = 1, 1974 .fields = (VMStateField[]) { 1975 VMSTATE_UINT8(unit_attention.key, SCSIDevice), 1976 VMSTATE_UINT8(unit_attention.asc, SCSIDevice), 1977 VMSTATE_UINT8(unit_attention.ascq, SCSIDevice), 1978 VMSTATE_BOOL(sense_is_ua, SCSIDevice), 1979 VMSTATE_UINT8_SUB_ARRAY(sense, SCSIDevice, 0, SCSI_SENSE_BUF_SIZE_OLD), 1980 VMSTATE_UINT32(sense_len, SCSIDevice), 1981 { 1982 .name = "requests", 1983 .version_id = 0, 1984 .field_exists = NULL, 1985 .size = 0, /* ouch */ 1986 .info = &vmstate_info_scsi_requests, 1987 .flags = VMS_SINGLE, 1988 .offset = 0, 1989 }, 1990 VMSTATE_END_OF_LIST() 1991 }, 1992 .subsections = (VMStateSubsection []) { 1993 { 1994 .vmsd = &vmstate_scsi_sense_state, 1995 .needed = scsi_sense_state_needed, 1996 }, { 1997 /* empty */ 1998 } 1999 } 2000 }; 2001 2002 static void scsi_device_class_init(ObjectClass *klass, void *data) 2003 { 2004 DeviceClass *k = DEVICE_CLASS(klass); 2005 set_bit(DEVICE_CATEGORY_STORAGE, k->categories); 2006 k->bus_type = TYPE_SCSI_BUS; 2007 k->realize = scsi_qdev_realize; 2008 k->unrealize = scsi_qdev_unrealize; 2009 k->props = scsi_props; 2010 } 2011 2012 static void scsi_dev_instance_init(Object *obj) 2013 { 2014 DeviceState *dev = DEVICE(obj); 2015 SCSIDevice *s = DO_UPCAST(SCSIDevice, qdev, dev); 2016 2017 device_add_bootindex_property(obj, &s->conf.bootindex, 2018 "bootindex", NULL, 2019 &s->qdev, NULL); 2020 } 2021 2022 static const TypeInfo scsi_device_type_info = { 2023 .name = TYPE_SCSI_DEVICE, 2024 .parent = TYPE_DEVICE, 2025 .instance_size = sizeof(SCSIDevice), 2026 .abstract = true, 2027 .class_size = sizeof(SCSIDeviceClass), 2028 .class_init = scsi_device_class_init, 2029 .instance_init = scsi_dev_instance_init, 2030 }; 2031 2032 static void scsi_register_types(void) 2033 { 2034 type_register_static(&scsi_bus_info); 2035 type_register_static(&scsi_device_type_info); 2036 } 2037 2038 type_init(scsi_register_types) 2039