1 /* 2 * USB Mass Storage Device emulation 3 * 4 * Copyright (c) 2006 CodeSourcery. 5 * Written by Paul Brook 6 * 7 * This code is licensed under the LGPL. 8 */ 9 10 #include "qemu-common.h" 11 #include "qemu/option.h" 12 #include "qemu/config-file.h" 13 #include "hw/usb.h" 14 #include "hw/usb/desc.h" 15 #include "hw/scsi/scsi.h" 16 #include "ui/console.h" 17 #include "monitor/monitor.h" 18 #include "sysemu/sysemu.h" 19 #include "sysemu/block-backend.h" 20 #include "sysemu/blockdev.h" 21 #include "qapi/visitor.h" 22 23 //#define DEBUG_MSD 24 25 #ifdef DEBUG_MSD 26 #define DPRINTF(fmt, ...) \ 27 do { printf("usb-msd: " fmt , ## __VA_ARGS__); } while (0) 28 #else 29 #define DPRINTF(fmt, ...) do {} while(0) 30 #endif 31 32 /* USB requests. */ 33 #define MassStorageReset 0xff 34 #define GetMaxLun 0xfe 35 36 enum USBMSDMode { 37 USB_MSDM_CBW, /* Command Block. */ 38 USB_MSDM_DATAOUT, /* Transfer data to device. */ 39 USB_MSDM_DATAIN, /* Transfer data from device. */ 40 USB_MSDM_CSW /* Command Status. */ 41 }; 42 43 struct usb_msd_csw { 44 uint32_t sig; 45 uint32_t tag; 46 uint32_t residue; 47 uint8_t status; 48 }; 49 50 typedef struct { 51 USBDevice dev; 52 enum USBMSDMode mode; 53 uint32_t scsi_off; 54 uint32_t scsi_len; 55 uint32_t data_len; 56 struct usb_msd_csw csw; 57 SCSIRequest *req; 58 SCSIBus bus; 59 /* For async completion. */ 60 USBPacket *packet; 61 /* usb-storage only */ 62 BlockConf conf; 63 uint32_t removable; 64 SCSIDevice *scsi_dev; 65 } MSDState; 66 67 #define TYPE_USB_STORAGE "usb-storage-dev" 68 #define USB_STORAGE_DEV(obj) OBJECT_CHECK(MSDState, (obj), TYPE_USB_STORAGE) 69 70 struct usb_msd_cbw { 71 uint32_t sig; 72 uint32_t tag; 73 uint32_t data_len; 74 uint8_t flags; 75 uint8_t lun; 76 uint8_t cmd_len; 77 uint8_t cmd[16]; 78 }; 79 80 enum { 81 STR_MANUFACTURER = 1, 82 STR_PRODUCT, 83 STR_SERIALNUMBER, 84 STR_CONFIG_FULL, 85 STR_CONFIG_HIGH, 86 STR_CONFIG_SUPER, 87 }; 88 89 static const USBDescStrings desc_strings = { 90 [STR_MANUFACTURER] = "QEMU", 91 [STR_PRODUCT] = "QEMU USB HARDDRIVE", 92 [STR_SERIALNUMBER] = "1", 93 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)", 94 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)", 95 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)", 96 }; 97 98 static const USBDescIface desc_iface_full = { 99 .bInterfaceNumber = 0, 100 .bNumEndpoints = 2, 101 .bInterfaceClass = USB_CLASS_MASS_STORAGE, 102 .bInterfaceSubClass = 0x06, /* SCSI */ 103 .bInterfaceProtocol = 0x50, /* Bulk */ 104 .eps = (USBDescEndpoint[]) { 105 { 106 .bEndpointAddress = USB_DIR_IN | 0x01, 107 .bmAttributes = USB_ENDPOINT_XFER_BULK, 108 .wMaxPacketSize = 64, 109 },{ 110 .bEndpointAddress = USB_DIR_OUT | 0x02, 111 .bmAttributes = USB_ENDPOINT_XFER_BULK, 112 .wMaxPacketSize = 64, 113 }, 114 } 115 }; 116 117 static const USBDescDevice desc_device_full = { 118 .bcdUSB = 0x0200, 119 .bMaxPacketSize0 = 8, 120 .bNumConfigurations = 1, 121 .confs = (USBDescConfig[]) { 122 { 123 .bNumInterfaces = 1, 124 .bConfigurationValue = 1, 125 .iConfiguration = STR_CONFIG_FULL, 126 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER, 127 .nif = 1, 128 .ifs = &desc_iface_full, 129 }, 130 }, 131 }; 132 133 static const USBDescIface desc_iface_high = { 134 .bInterfaceNumber = 0, 135 .bNumEndpoints = 2, 136 .bInterfaceClass = USB_CLASS_MASS_STORAGE, 137 .bInterfaceSubClass = 0x06, /* SCSI */ 138 .bInterfaceProtocol = 0x50, /* Bulk */ 139 .eps = (USBDescEndpoint[]) { 140 { 141 .bEndpointAddress = USB_DIR_IN | 0x01, 142 .bmAttributes = USB_ENDPOINT_XFER_BULK, 143 .wMaxPacketSize = 512, 144 },{ 145 .bEndpointAddress = USB_DIR_OUT | 0x02, 146 .bmAttributes = USB_ENDPOINT_XFER_BULK, 147 .wMaxPacketSize = 512, 148 }, 149 } 150 }; 151 152 static const USBDescDevice desc_device_high = { 153 .bcdUSB = 0x0200, 154 .bMaxPacketSize0 = 64, 155 .bNumConfigurations = 1, 156 .confs = (USBDescConfig[]) { 157 { 158 .bNumInterfaces = 1, 159 .bConfigurationValue = 1, 160 .iConfiguration = STR_CONFIG_HIGH, 161 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER, 162 .nif = 1, 163 .ifs = &desc_iface_high, 164 }, 165 }, 166 }; 167 168 static const USBDescIface desc_iface_super = { 169 .bInterfaceNumber = 0, 170 .bNumEndpoints = 2, 171 .bInterfaceClass = USB_CLASS_MASS_STORAGE, 172 .bInterfaceSubClass = 0x06, /* SCSI */ 173 .bInterfaceProtocol = 0x50, /* Bulk */ 174 .eps = (USBDescEndpoint[]) { 175 { 176 .bEndpointAddress = USB_DIR_IN | 0x01, 177 .bmAttributes = USB_ENDPOINT_XFER_BULK, 178 .wMaxPacketSize = 1024, 179 .bMaxBurst = 15, 180 },{ 181 .bEndpointAddress = USB_DIR_OUT | 0x02, 182 .bmAttributes = USB_ENDPOINT_XFER_BULK, 183 .wMaxPacketSize = 1024, 184 .bMaxBurst = 15, 185 }, 186 } 187 }; 188 189 static const USBDescDevice desc_device_super = { 190 .bcdUSB = 0x0300, 191 .bMaxPacketSize0 = 9, 192 .bNumConfigurations = 1, 193 .confs = (USBDescConfig[]) { 194 { 195 .bNumInterfaces = 1, 196 .bConfigurationValue = 1, 197 .iConfiguration = STR_CONFIG_SUPER, 198 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER, 199 .nif = 1, 200 .ifs = &desc_iface_super, 201 }, 202 }, 203 }; 204 205 static const USBDesc desc = { 206 .id = { 207 .idVendor = 0x46f4, /* CRC16() of "QEMU" */ 208 .idProduct = 0x0001, 209 .bcdDevice = 0, 210 .iManufacturer = STR_MANUFACTURER, 211 .iProduct = STR_PRODUCT, 212 .iSerialNumber = STR_SERIALNUMBER, 213 }, 214 .full = &desc_device_full, 215 .high = &desc_device_high, 216 .super = &desc_device_super, 217 .str = desc_strings, 218 }; 219 220 static void usb_msd_copy_data(MSDState *s, USBPacket *p) 221 { 222 uint32_t len; 223 len = p->iov.size - p->actual_length; 224 if (len > s->scsi_len) 225 len = s->scsi_len; 226 usb_packet_copy(p, scsi_req_get_buf(s->req) + s->scsi_off, len); 227 s->scsi_len -= len; 228 s->scsi_off += len; 229 s->data_len -= len; 230 if (s->scsi_len == 0 || s->data_len == 0) { 231 scsi_req_continue(s->req); 232 } 233 } 234 235 static void usb_msd_send_status(MSDState *s, USBPacket *p) 236 { 237 int len; 238 239 DPRINTF("Command status %d tag 0x%x, len %zd\n", 240 s->csw.status, le32_to_cpu(s->csw.tag), p->iov.size); 241 242 assert(s->csw.sig == cpu_to_le32(0x53425355)); 243 len = MIN(sizeof(s->csw), p->iov.size); 244 usb_packet_copy(p, &s->csw, len); 245 memset(&s->csw, 0, sizeof(s->csw)); 246 } 247 248 static void usb_msd_packet_complete(MSDState *s) 249 { 250 USBPacket *p = s->packet; 251 252 /* Set s->packet to NULL before calling usb_packet_complete 253 because another request may be issued before 254 usb_packet_complete returns. */ 255 DPRINTF("Packet complete %p\n", p); 256 s->packet = NULL; 257 usb_packet_complete(&s->dev, p); 258 } 259 260 static void usb_msd_transfer_data(SCSIRequest *req, uint32_t len) 261 { 262 MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent); 263 USBPacket *p = s->packet; 264 265 assert((s->mode == USB_MSDM_DATAOUT) == (req->cmd.mode == SCSI_XFER_TO_DEV)); 266 s->scsi_len = len; 267 s->scsi_off = 0; 268 if (p) { 269 usb_msd_copy_data(s, p); 270 p = s->packet; 271 if (p && p->actual_length == p->iov.size) { 272 p->status = USB_RET_SUCCESS; /* Clear previous ASYNC status */ 273 usb_msd_packet_complete(s); 274 } 275 } 276 } 277 278 static void usb_msd_command_complete(SCSIRequest *req, uint32_t status, size_t resid) 279 { 280 MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent); 281 USBPacket *p = s->packet; 282 283 DPRINTF("Command complete %d tag 0x%x\n", status, req->tag); 284 285 s->csw.sig = cpu_to_le32(0x53425355); 286 s->csw.tag = cpu_to_le32(req->tag); 287 s->csw.residue = cpu_to_le32(s->data_len); 288 s->csw.status = status != 0; 289 290 if (s->packet) { 291 if (s->data_len == 0 && s->mode == USB_MSDM_DATAOUT) { 292 /* A deferred packet with no write data remaining must be 293 the status read packet. */ 294 usb_msd_send_status(s, p); 295 s->mode = USB_MSDM_CBW; 296 } else if (s->mode == USB_MSDM_CSW) { 297 usb_msd_send_status(s, p); 298 s->mode = USB_MSDM_CBW; 299 } else { 300 if (s->data_len) { 301 int len = (p->iov.size - p->actual_length); 302 usb_packet_skip(p, len); 303 s->data_len -= len; 304 } 305 if (s->data_len == 0) { 306 s->mode = USB_MSDM_CSW; 307 } 308 } 309 p->status = USB_RET_SUCCESS; /* Clear previous ASYNC status */ 310 usb_msd_packet_complete(s); 311 } else if (s->data_len == 0) { 312 s->mode = USB_MSDM_CSW; 313 } 314 scsi_req_unref(req); 315 s->req = NULL; 316 } 317 318 static void usb_msd_request_cancelled(SCSIRequest *req) 319 { 320 MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent); 321 322 if (req == s->req) { 323 scsi_req_unref(s->req); 324 s->req = NULL; 325 s->scsi_len = 0; 326 } 327 } 328 329 static void usb_msd_handle_reset(USBDevice *dev) 330 { 331 MSDState *s = (MSDState *)dev; 332 333 DPRINTF("Reset\n"); 334 if (s->req) { 335 scsi_req_cancel(s->req); 336 } 337 assert(s->req == NULL); 338 339 if (s->packet) { 340 s->packet->status = USB_RET_STALL; 341 usb_msd_packet_complete(s); 342 } 343 344 s->mode = USB_MSDM_CBW; 345 } 346 347 static void usb_msd_handle_control(USBDevice *dev, USBPacket *p, 348 int request, int value, int index, int length, uint8_t *data) 349 { 350 MSDState *s = (MSDState *)dev; 351 SCSIDevice *scsi_dev; 352 int ret, maxlun; 353 354 ret = usb_desc_handle_control(dev, p, request, value, index, length, data); 355 if (ret >= 0) { 356 return; 357 } 358 359 switch (request) { 360 case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 361 break; 362 /* Class specific requests. */ 363 case ClassInterfaceOutRequest | MassStorageReset: 364 /* Reset state ready for the next CBW. */ 365 s->mode = USB_MSDM_CBW; 366 break; 367 case ClassInterfaceRequest | GetMaxLun: 368 maxlun = 0; 369 for (;;) { 370 scsi_dev = scsi_device_find(&s->bus, 0, 0, maxlun+1); 371 if (scsi_dev == NULL) { 372 break; 373 } 374 if (scsi_dev->lun != maxlun+1) { 375 break; 376 } 377 maxlun++; 378 } 379 DPRINTF("MaxLun %d\n", maxlun); 380 data[0] = maxlun; 381 p->actual_length = 1; 382 break; 383 default: 384 p->status = USB_RET_STALL; 385 break; 386 } 387 } 388 389 static void usb_msd_cancel_io(USBDevice *dev, USBPacket *p) 390 { 391 MSDState *s = USB_STORAGE_DEV(dev); 392 393 assert(s->packet == p); 394 s->packet = NULL; 395 396 if (s->req) { 397 scsi_req_cancel(s->req); 398 } 399 } 400 401 static void usb_msd_handle_data(USBDevice *dev, USBPacket *p) 402 { 403 MSDState *s = (MSDState *)dev; 404 uint32_t tag; 405 struct usb_msd_cbw cbw; 406 uint8_t devep = p->ep->nr; 407 SCSIDevice *scsi_dev; 408 uint32_t len; 409 410 switch (p->pid) { 411 case USB_TOKEN_OUT: 412 if (devep != 2) 413 goto fail; 414 415 switch (s->mode) { 416 case USB_MSDM_CBW: 417 if (p->iov.size != 31) { 418 error_report("usb-msd: Bad CBW size"); 419 goto fail; 420 } 421 usb_packet_copy(p, &cbw, 31); 422 if (le32_to_cpu(cbw.sig) != 0x43425355) { 423 error_report("usb-msd: Bad signature %08x", 424 le32_to_cpu(cbw.sig)); 425 goto fail; 426 } 427 DPRINTF("Command on LUN %d\n", cbw.lun); 428 scsi_dev = scsi_device_find(&s->bus, 0, 0, cbw.lun); 429 if (scsi_dev == NULL) { 430 error_report("usb-msd: Bad LUN %d", cbw.lun); 431 goto fail; 432 } 433 tag = le32_to_cpu(cbw.tag); 434 s->data_len = le32_to_cpu(cbw.data_len); 435 if (s->data_len == 0) { 436 s->mode = USB_MSDM_CSW; 437 } else if (cbw.flags & 0x80) { 438 s->mode = USB_MSDM_DATAIN; 439 } else { 440 s->mode = USB_MSDM_DATAOUT; 441 } 442 DPRINTF("Command tag 0x%x flags %08x len %d data %d\n", 443 tag, cbw.flags, cbw.cmd_len, s->data_len); 444 assert(le32_to_cpu(s->csw.residue) == 0); 445 s->scsi_len = 0; 446 s->req = scsi_req_new(scsi_dev, tag, cbw.lun, cbw.cmd, NULL); 447 #ifdef DEBUG_MSD 448 scsi_req_print(s->req); 449 #endif 450 len = scsi_req_enqueue(s->req); 451 if (len) { 452 scsi_req_continue(s->req); 453 } 454 break; 455 456 case USB_MSDM_DATAOUT: 457 DPRINTF("Data out %zd/%d\n", p->iov.size, s->data_len); 458 if (p->iov.size > s->data_len) { 459 goto fail; 460 } 461 462 if (s->scsi_len) { 463 usb_msd_copy_data(s, p); 464 } 465 if (le32_to_cpu(s->csw.residue)) { 466 int len = p->iov.size - p->actual_length; 467 if (len) { 468 usb_packet_skip(p, len); 469 s->data_len -= len; 470 if (s->data_len == 0) { 471 s->mode = USB_MSDM_CSW; 472 } 473 } 474 } 475 if (p->actual_length < p->iov.size) { 476 DPRINTF("Deferring packet %p [wait data-out]\n", p); 477 s->packet = p; 478 p->status = USB_RET_ASYNC; 479 } 480 break; 481 482 default: 483 DPRINTF("Unexpected write (len %zd)\n", p->iov.size); 484 goto fail; 485 } 486 break; 487 488 case USB_TOKEN_IN: 489 if (devep != 1) 490 goto fail; 491 492 switch (s->mode) { 493 case USB_MSDM_DATAOUT: 494 if (s->data_len != 0 || p->iov.size < 13) { 495 goto fail; 496 } 497 /* Waiting for SCSI write to complete. */ 498 s->packet = p; 499 p->status = USB_RET_ASYNC; 500 break; 501 502 case USB_MSDM_CSW: 503 if (p->iov.size < 13) { 504 goto fail; 505 } 506 507 if (s->req) { 508 /* still in flight */ 509 DPRINTF("Deferring packet %p [wait status]\n", p); 510 s->packet = p; 511 p->status = USB_RET_ASYNC; 512 } else { 513 usb_msd_send_status(s, p); 514 s->mode = USB_MSDM_CBW; 515 } 516 break; 517 518 case USB_MSDM_DATAIN: 519 DPRINTF("Data in %zd/%d, scsi_len %d\n", 520 p->iov.size, s->data_len, s->scsi_len); 521 if (s->scsi_len) { 522 usb_msd_copy_data(s, p); 523 } 524 if (le32_to_cpu(s->csw.residue)) { 525 int len = p->iov.size - p->actual_length; 526 if (len) { 527 usb_packet_skip(p, len); 528 s->data_len -= len; 529 if (s->data_len == 0) { 530 s->mode = USB_MSDM_CSW; 531 } 532 } 533 } 534 if (p->actual_length < p->iov.size) { 535 DPRINTF("Deferring packet %p [wait data-in]\n", p); 536 s->packet = p; 537 p->status = USB_RET_ASYNC; 538 } 539 break; 540 541 default: 542 DPRINTF("Unexpected read (len %zd)\n", p->iov.size); 543 goto fail; 544 } 545 break; 546 547 default: 548 DPRINTF("Bad token\n"); 549 fail: 550 p->status = USB_RET_STALL; 551 break; 552 } 553 } 554 555 static void usb_msd_password_cb(void *opaque, int err) 556 { 557 MSDState *s = opaque; 558 Error *local_err = NULL; 559 560 if (!err) { 561 usb_device_attach(&s->dev, &local_err); 562 } 563 564 if (local_err) { 565 error_report_err(local_err); 566 qdev_unplug(&s->dev.qdev, NULL); 567 } 568 } 569 570 static void *usb_msd_load_request(QEMUFile *f, SCSIRequest *req) 571 { 572 MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent); 573 574 /* nothing to load, just store req in our state struct */ 575 assert(s->req == NULL); 576 scsi_req_ref(req); 577 s->req = req; 578 return NULL; 579 } 580 581 static const struct SCSIBusInfo usb_msd_scsi_info_storage = { 582 .tcq = false, 583 .max_target = 0, 584 .max_lun = 0, 585 586 .transfer_data = usb_msd_transfer_data, 587 .complete = usb_msd_command_complete, 588 .cancel = usb_msd_request_cancelled, 589 .load_request = usb_msd_load_request, 590 }; 591 592 static const struct SCSIBusInfo usb_msd_scsi_info_bot = { 593 .tcq = false, 594 .max_target = 0, 595 .max_lun = 15, 596 597 .transfer_data = usb_msd_transfer_data, 598 .complete = usb_msd_command_complete, 599 .cancel = usb_msd_request_cancelled, 600 .load_request = usb_msd_load_request, 601 }; 602 603 static void usb_msd_realize_storage(USBDevice *dev, Error **errp) 604 { 605 MSDState *s = USB_STORAGE_DEV(dev); 606 BlockBackend *blk = s->conf.blk; 607 SCSIDevice *scsi_dev; 608 Error *err = NULL; 609 610 if (!blk) { 611 error_setg(errp, "drive property not set"); 612 return; 613 } 614 615 bdrv_add_key(blk_bs(blk), NULL, &err); 616 if (err) { 617 if (monitor_cur_is_qmp()) { 618 error_propagate(errp, err); 619 return; 620 } 621 error_free(err); 622 err = NULL; 623 if (cur_mon) { 624 monitor_read_bdrv_key_start(cur_mon, blk_bs(blk), 625 usb_msd_password_cb, s); 626 s->dev.auto_attach = 0; 627 } else { 628 autostart = 0; 629 } 630 } 631 632 blkconf_serial(&s->conf, &dev->serial); 633 blkconf_blocksizes(&s->conf); 634 635 /* 636 * Hack alert: this pretends to be a block device, but it's really 637 * a SCSI bus that can serve only a single device, which it 638 * creates automatically. But first it needs to detach from its 639 * blockdev, or else scsi_bus_legacy_add_drive() dies when it 640 * attaches again. 641 * 642 * The hack is probably a bad idea. 643 */ 644 blk_detach_dev(blk, &s->dev.qdev); 645 s->conf.blk = NULL; 646 647 usb_desc_create_serial(dev); 648 usb_desc_init(dev); 649 scsi_bus_new(&s->bus, sizeof(s->bus), DEVICE(dev), 650 &usb_msd_scsi_info_storage, NULL); 651 scsi_dev = scsi_bus_legacy_add_drive(&s->bus, blk, 0, !!s->removable, 652 s->conf.bootindex, dev->serial, 653 &err); 654 if (!scsi_dev) { 655 error_propagate(errp, err); 656 return; 657 } 658 usb_msd_handle_reset(dev); 659 s->scsi_dev = scsi_dev; 660 } 661 662 static void usb_msd_realize_bot(USBDevice *dev, Error **errp) 663 { 664 MSDState *s = USB_STORAGE_DEV(dev); 665 666 usb_desc_create_serial(dev); 667 usb_desc_init(dev); 668 scsi_bus_new(&s->bus, sizeof(s->bus), DEVICE(dev), 669 &usb_msd_scsi_info_bot, NULL); 670 usb_msd_handle_reset(dev); 671 } 672 673 static USBDevice *usb_msd_init(USBBus *bus, const char *filename) 674 { 675 static int nr=0; 676 Error *err = NULL; 677 char id[8]; 678 QemuOpts *opts; 679 DriveInfo *dinfo; 680 USBDevice *dev; 681 const char *p1; 682 char fmt[32]; 683 684 /* parse -usbdevice disk: syntax into drive opts */ 685 do { 686 snprintf(id, sizeof(id), "usb%d", nr++); 687 opts = qemu_opts_create(qemu_find_opts("drive"), id, 1, NULL); 688 } while (!opts); 689 690 p1 = strchr(filename, ':'); 691 if (p1++) { 692 const char *p2; 693 694 if (strstart(filename, "format=", &p2)) { 695 int len = MIN(p1 - p2, sizeof(fmt)); 696 pstrcpy(fmt, len, p2); 697 qemu_opt_set(opts, "format", fmt, &error_abort); 698 } else if (*filename != ':') { 699 error_report("unrecognized USB mass-storage option %s", filename); 700 return NULL; 701 } 702 filename = p1; 703 } 704 if (!*filename) { 705 error_report("block device specification needed"); 706 return NULL; 707 } 708 qemu_opt_set(opts, "file", filename, &error_abort); 709 qemu_opt_set(opts, "if", "none", &error_abort); 710 711 /* create host drive */ 712 dinfo = drive_new(opts, 0); 713 if (!dinfo) { 714 qemu_opts_del(opts); 715 return NULL; 716 } 717 718 /* create guest device */ 719 dev = usb_create(bus, "usb-storage"); 720 qdev_prop_set_drive(&dev->qdev, "drive", blk_by_legacy_dinfo(dinfo), 721 &err); 722 if (err) { 723 error_report_err(err); 724 object_unparent(OBJECT(dev)); 725 return NULL; 726 } 727 return dev; 728 } 729 730 static const VMStateDescription vmstate_usb_msd = { 731 .name = "usb-storage", 732 .version_id = 1, 733 .minimum_version_id = 1, 734 .fields = (VMStateField[]) { 735 VMSTATE_USB_DEVICE(dev, MSDState), 736 VMSTATE_UINT32(mode, MSDState), 737 VMSTATE_UINT32(scsi_len, MSDState), 738 VMSTATE_UINT32(scsi_off, MSDState), 739 VMSTATE_UINT32(data_len, MSDState), 740 VMSTATE_UINT32(csw.sig, MSDState), 741 VMSTATE_UINT32(csw.tag, MSDState), 742 VMSTATE_UINT32(csw.residue, MSDState), 743 VMSTATE_UINT8(csw.status, MSDState), 744 VMSTATE_END_OF_LIST() 745 } 746 }; 747 748 static Property msd_properties[] = { 749 DEFINE_BLOCK_PROPERTIES(MSDState, conf), 750 DEFINE_PROP_BIT("removable", MSDState, removable, 0, false), 751 DEFINE_PROP_END_OF_LIST(), 752 }; 753 754 static void usb_msd_class_initfn_common(ObjectClass *klass, void *data) 755 { 756 DeviceClass *dc = DEVICE_CLASS(klass); 757 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 758 759 uc->product_desc = "QEMU USB MSD"; 760 uc->usb_desc = &desc; 761 uc->cancel_packet = usb_msd_cancel_io; 762 uc->handle_attach = usb_desc_attach; 763 uc->handle_reset = usb_msd_handle_reset; 764 uc->handle_control = usb_msd_handle_control; 765 uc->handle_data = usb_msd_handle_data; 766 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 767 dc->fw_name = "storage"; 768 dc->vmsd = &vmstate_usb_msd; 769 } 770 771 static void usb_msd_class_initfn_storage(ObjectClass *klass, void *data) 772 { 773 DeviceClass *dc = DEVICE_CLASS(klass); 774 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 775 776 uc->realize = usb_msd_realize_storage; 777 dc->props = msd_properties; 778 } 779 780 static void usb_msd_get_bootindex(Object *obj, Visitor *v, void *opaque, 781 const char *name, Error **errp) 782 { 783 USBDevice *dev = USB_DEVICE(obj); 784 MSDState *s = USB_STORAGE_DEV(dev); 785 786 visit_type_int32(v, &s->conf.bootindex, name, errp); 787 } 788 789 static void usb_msd_set_bootindex(Object *obj, Visitor *v, void *opaque, 790 const char *name, Error **errp) 791 { 792 USBDevice *dev = USB_DEVICE(obj); 793 MSDState *s = USB_STORAGE_DEV(dev); 794 int32_t boot_index; 795 Error *local_err = NULL; 796 797 visit_type_int32(v, &boot_index, name, &local_err); 798 if (local_err) { 799 goto out; 800 } 801 /* check whether bootindex is present in fw_boot_order list */ 802 check_boot_index(boot_index, &local_err); 803 if (local_err) { 804 goto out; 805 } 806 /* change bootindex to a new one */ 807 s->conf.bootindex = boot_index; 808 809 if (s->scsi_dev) { 810 object_property_set_int(OBJECT(s->scsi_dev), boot_index, "bootindex", 811 &error_abort); 812 } 813 814 out: 815 if (local_err) { 816 error_propagate(errp, local_err); 817 } 818 } 819 820 static const TypeInfo usb_storage_dev_type_info = { 821 .name = TYPE_USB_STORAGE, 822 .parent = TYPE_USB_DEVICE, 823 .instance_size = sizeof(MSDState), 824 .abstract = true, 825 .class_init = usb_msd_class_initfn_common, 826 }; 827 828 static void usb_msd_instance_init(Object *obj) 829 { 830 object_property_add(obj, "bootindex", "int32", 831 usb_msd_get_bootindex, 832 usb_msd_set_bootindex, NULL, NULL, NULL); 833 object_property_set_int(obj, -1, "bootindex", NULL); 834 } 835 836 static void usb_msd_class_initfn_bot(ObjectClass *klass, void *data) 837 { 838 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 839 DeviceClass *dc = DEVICE_CLASS(klass); 840 841 uc->realize = usb_msd_realize_bot; 842 dc->hotpluggable = false; 843 } 844 845 static const TypeInfo msd_info = { 846 .name = "usb-storage", 847 .parent = TYPE_USB_STORAGE, 848 .class_init = usb_msd_class_initfn_storage, 849 .instance_init = usb_msd_instance_init, 850 }; 851 852 static const TypeInfo bot_info = { 853 .name = "usb-bot", 854 .parent = TYPE_USB_STORAGE, 855 .class_init = usb_msd_class_initfn_bot, 856 }; 857 858 static void usb_msd_register_types(void) 859 { 860 type_register_static(&usb_storage_dev_type_info); 861 type_register_static(&msd_info); 862 type_register_static(&bot_info); 863 usb_legacy_register("usb-storage", "disk", usb_msd_init); 864 } 865 866 type_init(usb_msd_register_types) 867