1 /* 2 * QEMU ATAPI Emulation 3 * 4 * Copyright (c) 2003 Fabrice Bellard 5 * Copyright (c) 2006 Openedhand Ltd. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 26 #include "qemu/osdep.h" 27 #include "hw/ide/internal.h" 28 #include "hw/scsi/scsi.h" 29 #include "sysemu/block-backend.h" 30 #include "trace.h" 31 32 #define ATAPI_SECTOR_BITS (2 + BDRV_SECTOR_BITS) 33 #define ATAPI_SECTOR_SIZE (1 << ATAPI_SECTOR_BITS) 34 35 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret); 36 37 static void padstr8(uint8_t *buf, int buf_size, const char *src) 38 { 39 int i; 40 for(i = 0; i < buf_size; i++) { 41 if (*src) 42 buf[i] = *src++; 43 else 44 buf[i] = ' '; 45 } 46 } 47 48 static void lba_to_msf(uint8_t *buf, int lba) 49 { 50 lba += 150; 51 buf[0] = (lba / 75) / 60; 52 buf[1] = (lba / 75) % 60; 53 buf[2] = lba % 75; 54 } 55 56 static inline int media_present(IDEState *s) 57 { 58 return !s->tray_open && s->nb_sectors > 0; 59 } 60 61 /* XXX: DVDs that could fit on a CD will be reported as a CD */ 62 static inline int media_is_dvd(IDEState *s) 63 { 64 return (media_present(s) && s->nb_sectors > CD_MAX_SECTORS); 65 } 66 67 static inline int media_is_cd(IDEState *s) 68 { 69 return (media_present(s) && s->nb_sectors <= CD_MAX_SECTORS); 70 } 71 72 static void cd_data_to_raw(uint8_t *buf, int lba) 73 { 74 /* sync bytes */ 75 buf[0] = 0x00; 76 memset(buf + 1, 0xff, 10); 77 buf[11] = 0x00; 78 buf += 12; 79 /* MSF */ 80 lba_to_msf(buf, lba); 81 buf[3] = 0x01; /* mode 1 data */ 82 buf += 4; 83 /* data */ 84 buf += 2048; 85 /* XXX: ECC not computed */ 86 memset(buf, 0, 288); 87 } 88 89 static int 90 cd_read_sector_sync(IDEState *s) 91 { 92 int ret; 93 block_acct_start(blk_get_stats(s->blk), &s->acct, 94 ATAPI_SECTOR_SIZE, BLOCK_ACCT_READ); 95 96 trace_cd_read_sector_sync(s->lba); 97 98 switch (s->cd_sector_size) { 99 case 2048: 100 ret = blk_pread(s->blk, (int64_t)s->lba << ATAPI_SECTOR_BITS, 101 s->io_buffer, ATAPI_SECTOR_SIZE); 102 break; 103 case 2352: 104 ret = blk_pread(s->blk, (int64_t)s->lba << ATAPI_SECTOR_BITS, 105 s->io_buffer + 16, ATAPI_SECTOR_SIZE); 106 if (ret >= 0) { 107 cd_data_to_raw(s->io_buffer, s->lba); 108 } 109 break; 110 default: 111 block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ); 112 return -EIO; 113 } 114 115 if (ret < 0) { 116 block_acct_failed(blk_get_stats(s->blk), &s->acct); 117 } else { 118 block_acct_done(blk_get_stats(s->blk), &s->acct); 119 s->lba++; 120 s->io_buffer_index = 0; 121 } 122 123 return ret; 124 } 125 126 static void cd_read_sector_cb(void *opaque, int ret) 127 { 128 IDEState *s = opaque; 129 130 trace_cd_read_sector_cb(s->lba, ret); 131 132 if (ret < 0) { 133 block_acct_failed(blk_get_stats(s->blk), &s->acct); 134 ide_atapi_io_error(s, ret); 135 return; 136 } 137 138 block_acct_done(blk_get_stats(s->blk), &s->acct); 139 140 if (s->cd_sector_size == 2352) { 141 cd_data_to_raw(s->io_buffer, s->lba); 142 } 143 144 s->lba++; 145 s->io_buffer_index = 0; 146 s->status &= ~BUSY_STAT; 147 148 ide_atapi_cmd_reply_end(s); 149 } 150 151 static int cd_read_sector(IDEState *s) 152 { 153 void *buf; 154 155 if (s->cd_sector_size != 2048 && s->cd_sector_size != 2352) { 156 block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ); 157 return -EINVAL; 158 } 159 160 buf = (s->cd_sector_size == 2352) ? s->io_buffer + 16 : s->io_buffer; 161 qemu_iovec_init_buf(&s->qiov, buf, ATAPI_SECTOR_SIZE); 162 163 trace_cd_read_sector(s->lba); 164 165 block_acct_start(blk_get_stats(s->blk), &s->acct, 166 ATAPI_SECTOR_SIZE, BLOCK_ACCT_READ); 167 168 ide_buffered_readv(s, (int64_t)s->lba << 2, &s->qiov, 4, 169 cd_read_sector_cb, s); 170 171 s->status |= BUSY_STAT; 172 return 0; 173 } 174 175 void ide_atapi_cmd_ok(IDEState *s) 176 { 177 s->error = 0; 178 s->status = READY_STAT | SEEK_STAT; 179 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 180 ide_transfer_stop(s); 181 ide_set_irq(s->bus); 182 } 183 184 void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc) 185 { 186 trace_ide_atapi_cmd_error(s, sense_key, asc); 187 s->error = sense_key << 4; 188 s->status = READY_STAT | ERR_STAT; 189 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 190 s->sense_key = sense_key; 191 s->asc = asc; 192 ide_transfer_stop(s); 193 ide_set_irq(s->bus); 194 } 195 196 void ide_atapi_io_error(IDEState *s, int ret) 197 { 198 /* XXX: handle more errors */ 199 if (ret == -ENOMEDIUM) { 200 ide_atapi_cmd_error(s, NOT_READY, 201 ASC_MEDIUM_NOT_PRESENT); 202 } else { 203 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 204 ASC_LOGICAL_BLOCK_OOR); 205 } 206 } 207 208 static uint16_t atapi_byte_count_limit(IDEState *s) 209 { 210 uint16_t bcl; 211 212 bcl = s->lcyl | (s->hcyl << 8); 213 if (bcl == 0xffff) { 214 return 0xfffe; 215 } 216 return bcl; 217 } 218 219 /* The whole ATAPI transfer logic is handled in this function */ 220 void ide_atapi_cmd_reply_end(IDEState *s) 221 { 222 int byte_count_limit, size, ret; 223 while (s->packet_transfer_size > 0) { 224 trace_ide_atapi_cmd_reply_end(s, s->packet_transfer_size, 225 s->elementary_transfer_size, 226 s->io_buffer_index); 227 228 /* see if a new sector must be read */ 229 if (s->lba != -1 && s->io_buffer_index >= s->cd_sector_size) { 230 if (!s->elementary_transfer_size) { 231 ret = cd_read_sector(s); 232 if (ret < 0) { 233 ide_atapi_io_error(s, ret); 234 } 235 return; 236 } else { 237 /* rebuffering within an elementary transfer is 238 * only possible with a sync request because we 239 * end up with a race condition otherwise */ 240 ret = cd_read_sector_sync(s); 241 if (ret < 0) { 242 ide_atapi_io_error(s, ret); 243 return; 244 } 245 } 246 } 247 if (s->elementary_transfer_size > 0) { 248 /* there are some data left to transmit in this elementary 249 transfer */ 250 size = s->cd_sector_size - s->io_buffer_index; 251 if (size > s->elementary_transfer_size) 252 size = s->elementary_transfer_size; 253 } else { 254 /* a new transfer is needed */ 255 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO; 256 ide_set_irq(s->bus); 257 byte_count_limit = atapi_byte_count_limit(s); 258 trace_ide_atapi_cmd_reply_end_bcl(s, byte_count_limit); 259 size = s->packet_transfer_size; 260 if (size > byte_count_limit) { 261 /* byte count limit must be even if this case */ 262 if (byte_count_limit & 1) 263 byte_count_limit--; 264 size = byte_count_limit; 265 } 266 s->lcyl = size; 267 s->hcyl = size >> 8; 268 s->elementary_transfer_size = size; 269 /* we cannot transmit more than one sector at a time */ 270 if (s->lba != -1) { 271 if (size > (s->cd_sector_size - s->io_buffer_index)) 272 size = (s->cd_sector_size - s->io_buffer_index); 273 } 274 trace_ide_atapi_cmd_reply_end_new(s, s->status); 275 } 276 s->packet_transfer_size -= size; 277 s->elementary_transfer_size -= size; 278 s->io_buffer_index += size; 279 280 /* Some adapters process PIO data right away. In that case, we need 281 * to avoid mutual recursion between ide_transfer_start 282 * and ide_atapi_cmd_reply_end. 283 */ 284 if (!ide_transfer_start_norecurse(s, 285 s->io_buffer + s->io_buffer_index - size, 286 size, ide_atapi_cmd_reply_end)) { 287 return; 288 } 289 } 290 291 /* end of transfer */ 292 trace_ide_atapi_cmd_reply_end_eot(s, s->status); 293 ide_atapi_cmd_ok(s); 294 ide_set_irq(s->bus); 295 } 296 297 /* send a reply of 'size' bytes in s->io_buffer to an ATAPI command */ 298 static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size) 299 { 300 if (size > max_size) 301 size = max_size; 302 s->lba = -1; /* no sector read */ 303 s->packet_transfer_size = size; 304 s->io_buffer_size = size; /* dma: send the reply data as one chunk */ 305 s->elementary_transfer_size = 0; 306 307 if (s->atapi_dma) { 308 block_acct_start(blk_get_stats(s->blk), &s->acct, size, 309 BLOCK_ACCT_READ); 310 s->status = READY_STAT | SEEK_STAT | DRQ_STAT; 311 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 312 } else { 313 s->status = READY_STAT | SEEK_STAT; 314 s->io_buffer_index = 0; 315 ide_atapi_cmd_reply_end(s); 316 } 317 } 318 319 /* start a CD-CDROM read command */ 320 static void ide_atapi_cmd_read_pio(IDEState *s, int lba, int nb_sectors, 321 int sector_size) 322 { 323 s->lba = lba; 324 s->packet_transfer_size = nb_sectors * sector_size; 325 s->elementary_transfer_size = 0; 326 s->io_buffer_index = sector_size; 327 s->cd_sector_size = sector_size; 328 329 ide_atapi_cmd_reply_end(s); 330 } 331 332 static void ide_atapi_cmd_check_status(IDEState *s) 333 { 334 trace_ide_atapi_cmd_check_status(s); 335 s->error = MC_ERR | (UNIT_ATTENTION << 4); 336 s->status = ERR_STAT; 337 s->nsector = 0; 338 ide_set_irq(s->bus); 339 } 340 /* ATAPI DMA support */ 341 342 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret) 343 { 344 IDEState *s = opaque; 345 int data_offset, n; 346 347 if (ret < 0) { 348 if (ide_handle_rw_error(s, -ret, ide_dma_cmd_to_retry(s->dma_cmd))) { 349 if (s->bus->error_status) { 350 s->bus->dma->aiocb = NULL; 351 return; 352 } 353 goto eot; 354 } 355 } 356 357 if (s->io_buffer_size > 0) { 358 /* 359 * For a cdrom read sector command (s->lba != -1), 360 * adjust the lba for the next s->io_buffer_size chunk 361 * and dma the current chunk. 362 * For a command != read (s->lba == -1), just transfer 363 * the reply data. 364 */ 365 if (s->lba != -1) { 366 if (s->cd_sector_size == 2352) { 367 n = 1; 368 cd_data_to_raw(s->io_buffer, s->lba); 369 } else { 370 n = s->io_buffer_size >> 11; 371 } 372 s->lba += n; 373 } 374 s->packet_transfer_size -= s->io_buffer_size; 375 if (s->bus->dma->ops->rw_buf(s->bus->dma, 1) == 0) 376 goto eot; 377 } 378 379 if (s->packet_transfer_size <= 0) { 380 s->status = READY_STAT | SEEK_STAT; 381 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 382 ide_set_irq(s->bus); 383 goto eot; 384 } 385 386 s->io_buffer_index = 0; 387 if (s->cd_sector_size == 2352) { 388 n = 1; 389 s->io_buffer_size = s->cd_sector_size; 390 data_offset = 16; 391 } else { 392 n = s->packet_transfer_size >> 11; 393 if (n > (IDE_DMA_BUF_SECTORS / 4)) 394 n = (IDE_DMA_BUF_SECTORS / 4); 395 s->io_buffer_size = n * 2048; 396 data_offset = 0; 397 } 398 trace_ide_atapi_cmd_read_dma_cb_aio(s, s->lba, n); 399 qemu_iovec_init_buf(&s->bus->dma->qiov, s->io_buffer + data_offset, 400 n * ATAPI_SECTOR_SIZE); 401 402 s->bus->dma->aiocb = ide_buffered_readv(s, (int64_t)s->lba << 2, 403 &s->bus->dma->qiov, n * 4, 404 ide_atapi_cmd_read_dma_cb, s); 405 return; 406 407 eot: 408 if (ret < 0) { 409 block_acct_failed(blk_get_stats(s->blk), &s->acct); 410 } else { 411 block_acct_done(blk_get_stats(s->blk), &s->acct); 412 } 413 ide_set_inactive(s, false); 414 } 415 416 /* start a CD-CDROM read command with DMA */ 417 /* XXX: test if DMA is available */ 418 static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors, 419 int sector_size) 420 { 421 s->lba = lba; 422 s->packet_transfer_size = nb_sectors * sector_size; 423 s->io_buffer_size = 0; 424 s->cd_sector_size = sector_size; 425 426 block_acct_start(blk_get_stats(s->blk), &s->acct, s->packet_transfer_size, 427 BLOCK_ACCT_READ); 428 429 /* XXX: check if BUSY_STAT should be set */ 430 s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT; 431 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 432 } 433 434 static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors, 435 int sector_size) 436 { 437 trace_ide_atapi_cmd_read(s, s->atapi_dma ? "dma" : "pio", 438 lba, nb_sectors); 439 if (s->atapi_dma) { 440 ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size); 441 } else { 442 ide_atapi_cmd_read_pio(s, lba, nb_sectors, sector_size); 443 } 444 } 445 446 void ide_atapi_dma_restart(IDEState *s) 447 { 448 /* 449 * At this point we can just re-evaluate the packet command and start over. 450 * The presence of ->dma_cb callback in the pre_save ensures that the packet 451 * command has been completely sent and we can safely restart command. 452 */ 453 s->unit = s->bus->retry_unit; 454 s->bus->dma->ops->restart_dma(s->bus->dma); 455 ide_atapi_cmd(s); 456 } 457 458 static inline uint8_t ide_atapi_set_profile(uint8_t *buf, uint8_t *index, 459 uint16_t profile) 460 { 461 uint8_t *buf_profile = buf + 12; /* start of profiles */ 462 463 buf_profile += ((*index) * 4); /* start of indexed profile */ 464 stw_be_p(buf_profile, profile); 465 buf_profile[2] = ((buf_profile[0] == buf[6]) && (buf_profile[1] == buf[7])); 466 467 /* each profile adds 4 bytes to the response */ 468 (*index)++; 469 buf[11] += 4; /* Additional Length */ 470 471 return 4; 472 } 473 474 static int ide_dvd_read_structure(IDEState *s, int format, 475 const uint8_t *packet, uint8_t *buf) 476 { 477 switch (format) { 478 case 0x0: /* Physical format information */ 479 { 480 int layer = packet[6]; 481 uint64_t total_sectors; 482 483 if (layer != 0) 484 return -ASC_INV_FIELD_IN_CMD_PACKET; 485 486 total_sectors = s->nb_sectors >> 2; 487 if (total_sectors == 0) { 488 return -ASC_MEDIUM_NOT_PRESENT; 489 } 490 491 buf[4] = 1; /* DVD-ROM, part version 1 */ 492 buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ 493 buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ 494 buf[7] = 0; /* default densities */ 495 496 /* FIXME: 0x30000 per spec? */ 497 stl_be_p(buf + 8, 0); /* start sector */ 498 stl_be_p(buf + 12, total_sectors - 1); /* end sector */ 499 stl_be_p(buf + 16, total_sectors - 1); /* l0 end sector */ 500 501 /* Size of buffer, not including 2 byte size field */ 502 stw_be_p(buf, 2048 + 2); 503 504 /* 2k data + 4 byte header */ 505 return (2048 + 4); 506 } 507 508 case 0x01: /* DVD copyright information */ 509 buf[4] = 0; /* no copyright data */ 510 buf[5] = 0; /* no region restrictions */ 511 512 /* Size of buffer, not including 2 byte size field */ 513 stw_be_p(buf, 4 + 2); 514 515 /* 4 byte header + 4 byte data */ 516 return (4 + 4); 517 518 case 0x03: /* BCA information - invalid field for no BCA info */ 519 return -ASC_INV_FIELD_IN_CMD_PACKET; 520 521 case 0x04: /* DVD disc manufacturing information */ 522 /* Size of buffer, not including 2 byte size field */ 523 stw_be_p(buf, 2048 + 2); 524 525 /* 2k data + 4 byte header */ 526 return (2048 + 4); 527 528 case 0xff: 529 /* 530 * This lists all the command capabilities above. Add new ones 531 * in order and update the length and buffer return values. 532 */ 533 534 buf[4] = 0x00; /* Physical format */ 535 buf[5] = 0x40; /* Not writable, is readable */ 536 stw_be_p(buf + 6, 2048 + 4); 537 538 buf[8] = 0x01; /* Copyright info */ 539 buf[9] = 0x40; /* Not writable, is readable */ 540 stw_be_p(buf + 10, 4 + 4); 541 542 buf[12] = 0x03; /* BCA info */ 543 buf[13] = 0x40; /* Not writable, is readable */ 544 stw_be_p(buf + 14, 188 + 4); 545 546 buf[16] = 0x04; /* Manufacturing info */ 547 buf[17] = 0x40; /* Not writable, is readable */ 548 stw_be_p(buf + 18, 2048 + 4); 549 550 /* Size of buffer, not including 2 byte size field */ 551 stw_be_p(buf, 16 + 2); 552 553 /* data written + 4 byte header */ 554 return (16 + 4); 555 556 default: /* TODO: formats beyond DVD-ROM requires */ 557 return -ASC_INV_FIELD_IN_CMD_PACKET; 558 } 559 } 560 561 static unsigned int event_status_media(IDEState *s, 562 uint8_t *buf) 563 { 564 uint8_t event_code, media_status; 565 566 media_status = 0; 567 if (s->tray_open) { 568 media_status = MS_TRAY_OPEN; 569 } else if (blk_is_inserted(s->blk)) { 570 media_status = MS_MEDIA_PRESENT; 571 } 572 573 /* Event notification descriptor */ 574 event_code = MEC_NO_CHANGE; 575 if (media_status != MS_TRAY_OPEN) { 576 if (s->events.new_media) { 577 event_code = MEC_NEW_MEDIA; 578 s->events.new_media = false; 579 } else if (s->events.eject_request) { 580 event_code = MEC_EJECT_REQUESTED; 581 s->events.eject_request = false; 582 } 583 } 584 585 buf[4] = event_code; 586 buf[5] = media_status; 587 588 /* These fields are reserved, just clear them. */ 589 buf[6] = 0; 590 buf[7] = 0; 591 592 return 8; /* We wrote to 4 extra bytes from the header */ 593 } 594 595 /* 596 * Before transferring data or otherwise signalling acceptance of a command 597 * marked CONDDATA, we must check the validity of the byte_count_limit. 598 */ 599 static bool validate_bcl(IDEState *s) 600 { 601 /* TODO: Check IDENTIFY data word 125 for defacult BCL (currently 0) */ 602 if (s->atapi_dma || atapi_byte_count_limit(s)) { 603 return true; 604 } 605 606 /* TODO: Move abort back into core.c and introduce proper error flow between 607 * ATAPI layer and IDE core layer */ 608 ide_abort_command(s); 609 return false; 610 } 611 612 static void cmd_get_event_status_notification(IDEState *s, 613 uint8_t *buf) 614 { 615 const uint8_t *packet = buf; 616 617 struct { 618 uint8_t opcode; 619 uint8_t polled; /* lsb bit is polled; others are reserved */ 620 uint8_t reserved2[2]; 621 uint8_t class; 622 uint8_t reserved3[2]; 623 uint16_t len; 624 uint8_t control; 625 } QEMU_PACKED *gesn_cdb; 626 627 struct { 628 uint16_t len; 629 uint8_t notification_class; 630 uint8_t supported_events; 631 } QEMU_PACKED *gesn_event_header; 632 unsigned int max_len, used_len; 633 634 gesn_cdb = (void *)packet; 635 gesn_event_header = (void *)buf; 636 637 max_len = be16_to_cpu(gesn_cdb->len); 638 639 /* It is fine by the MMC spec to not support async mode operations */ 640 if (!(gesn_cdb->polled & 0x01)) { /* asynchronous mode */ 641 /* Only polling is supported, asynchronous mode is not. */ 642 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 643 ASC_INV_FIELD_IN_CMD_PACKET); 644 return; 645 } 646 647 /* polling mode operation */ 648 649 /* 650 * These are the supported events. 651 * 652 * We currently only support requests of the 'media' type. 653 * Notification class requests and supported event classes are bitmasks, 654 * but they are build from the same values as the "notification class" 655 * field. 656 */ 657 gesn_event_header->supported_events = 1 << GESN_MEDIA; 658 659 /* 660 * We use |= below to set the class field; other bits in this byte 661 * are reserved now but this is useful to do if we have to use the 662 * reserved fields later. 663 */ 664 gesn_event_header->notification_class = 0; 665 666 /* 667 * Responses to requests are to be based on request priority. The 668 * notification_class_request_type enum above specifies the 669 * priority: upper elements are higher prio than lower ones. 670 */ 671 if (gesn_cdb->class & (1 << GESN_MEDIA)) { 672 gesn_event_header->notification_class |= GESN_MEDIA; 673 used_len = event_status_media(s, buf); 674 } else { 675 gesn_event_header->notification_class = 0x80; /* No event available */ 676 used_len = sizeof(*gesn_event_header); 677 } 678 gesn_event_header->len = cpu_to_be16(used_len 679 - sizeof(*gesn_event_header)); 680 ide_atapi_cmd_reply(s, used_len, max_len); 681 } 682 683 static void cmd_request_sense(IDEState *s, uint8_t *buf) 684 { 685 int max_len = buf[4]; 686 687 memset(buf, 0, 18); 688 buf[0] = 0x70 | (1 << 7); 689 buf[2] = s->sense_key; 690 buf[7] = 10; 691 buf[12] = s->asc; 692 693 if (s->sense_key == UNIT_ATTENTION) { 694 s->sense_key = NO_SENSE; 695 } 696 697 ide_atapi_cmd_reply(s, 18, max_len); 698 } 699 700 static void cmd_inquiry(IDEState *s, uint8_t *buf) 701 { 702 uint8_t page_code = buf[2]; 703 int max_len = buf[4]; 704 705 unsigned idx = 0; 706 unsigned size_idx; 707 unsigned preamble_len; 708 709 /* If the EVPD (Enable Vital Product Data) bit is set in byte 1, 710 * we are being asked for a specific page of info indicated by byte 2. */ 711 if (buf[1] & 0x01) { 712 preamble_len = 4; 713 size_idx = 3; 714 715 buf[idx++] = 0x05; /* CD-ROM */ 716 buf[idx++] = page_code; /* Page Code */ 717 buf[idx++] = 0x00; /* reserved */ 718 idx++; /* length (set later) */ 719 720 switch (page_code) { 721 case 0x00: 722 /* Supported Pages: List of supported VPD responses. */ 723 buf[idx++] = 0x00; /* 0x00: Supported Pages, and: */ 724 buf[idx++] = 0x83; /* 0x83: Device Identification. */ 725 break; 726 727 case 0x83: 728 /* Device Identification. Each entry is optional, but the entries 729 * included here are modeled after libata's VPD responses. 730 * If the response is given, at least one entry must be present. */ 731 732 /* Entry 1: Serial */ 733 if (idx + 24 > max_len) { 734 /* Not enough room for even the first entry: */ 735 /* 4 byte header + 20 byte string */ 736 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 737 ASC_DATA_PHASE_ERROR); 738 return; 739 } 740 buf[idx++] = 0x02; /* Ascii */ 741 buf[idx++] = 0x00; /* Vendor Specific */ 742 buf[idx++] = 0x00; 743 buf[idx++] = 20; /* Remaining length */ 744 padstr8(buf + idx, 20, s->drive_serial_str); 745 idx += 20; 746 747 /* Entry 2: Drive Model and Serial */ 748 if (idx + 72 > max_len) { 749 /* 4 (header) + 8 (vendor) + 60 (model & serial) */ 750 goto out; 751 } 752 buf[idx++] = 0x02; /* Ascii */ 753 buf[idx++] = 0x01; /* T10 Vendor */ 754 buf[idx++] = 0x00; 755 buf[idx++] = 68; 756 padstr8(buf + idx, 8, "ATA"); /* Generic T10 vendor */ 757 idx += 8; 758 padstr8(buf + idx, 40, s->drive_model_str); 759 idx += 40; 760 padstr8(buf + idx, 20, s->drive_serial_str); 761 idx += 20; 762 763 /* Entry 3: WWN */ 764 if (s->wwn && (idx + 12 <= max_len)) { 765 /* 4 byte header + 8 byte wwn */ 766 buf[idx++] = 0x01; /* Binary */ 767 buf[idx++] = 0x03; /* NAA */ 768 buf[idx++] = 0x00; 769 buf[idx++] = 0x08; 770 stq_be_p(&buf[idx], s->wwn); 771 idx += 8; 772 } 773 break; 774 775 default: 776 /* SPC-3, revision 23 sec. 6.4 */ 777 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 778 ASC_INV_FIELD_IN_CMD_PACKET); 779 return; 780 } 781 } else { 782 preamble_len = 5; 783 size_idx = 4; 784 785 buf[0] = 0x05; /* CD-ROM */ 786 buf[1] = 0x80; /* removable */ 787 buf[2] = 0x00; /* ISO */ 788 buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */ 789 /* buf[size_idx] set below. */ 790 buf[5] = 0; /* reserved */ 791 buf[6] = 0; /* reserved */ 792 buf[7] = 0; /* reserved */ 793 padstr8(buf + 8, 8, "QEMU"); 794 padstr8(buf + 16, 16, "QEMU DVD-ROM"); 795 padstr8(buf + 32, 4, s->version); 796 idx = 36; 797 } 798 799 out: 800 buf[size_idx] = idx - preamble_len; 801 ide_atapi_cmd_reply(s, idx, max_len); 802 } 803 804 static void cmd_get_configuration(IDEState *s, uint8_t *buf) 805 { 806 uint32_t len; 807 uint8_t index = 0; 808 int max_len; 809 810 /* only feature 0 is supported */ 811 if (buf[2] != 0 || buf[3] != 0) { 812 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 813 ASC_INV_FIELD_IN_CMD_PACKET); 814 return; 815 } 816 817 /* XXX: could result in alignment problems in some architectures */ 818 max_len = lduw_be_p(buf + 7); 819 820 /* 821 * XXX: avoid overflow for io_buffer if max_len is bigger than 822 * the size of that buffer (dimensioned to max number of 823 * sectors to transfer at once) 824 * 825 * Only a problem if the feature/profiles grow. 826 */ 827 if (max_len > 512) { 828 /* XXX: assume 1 sector */ 829 max_len = 512; 830 } 831 832 memset(buf, 0, max_len); 833 /* 834 * the number of sectors from the media tells us which profile 835 * to use as current. 0 means there is no media 836 */ 837 if (media_is_dvd(s)) { 838 stw_be_p(buf + 6, MMC_PROFILE_DVD_ROM); 839 } else if (media_is_cd(s)) { 840 stw_be_p(buf + 6, MMC_PROFILE_CD_ROM); 841 } 842 843 buf[10] = 0x02 | 0x01; /* persistent and current */ 844 len = 12; /* headers: 8 + 4 */ 845 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_DVD_ROM); 846 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_CD_ROM); 847 stl_be_p(buf, len - 4); /* data length */ 848 849 ide_atapi_cmd_reply(s, len, max_len); 850 } 851 852 static void cmd_mode_sense(IDEState *s, uint8_t *buf) 853 { 854 int action, code; 855 int max_len; 856 857 max_len = lduw_be_p(buf + 7); 858 action = buf[2] >> 6; 859 code = buf[2] & 0x3f; 860 861 switch(action) { 862 case 0: /* current values */ 863 switch(code) { 864 case MODE_PAGE_R_W_ERROR: /* error recovery */ 865 stw_be_p(&buf[0], 16 - 2); 866 buf[2] = 0x70; 867 buf[3] = 0; 868 buf[4] = 0; 869 buf[5] = 0; 870 buf[6] = 0; 871 buf[7] = 0; 872 873 buf[8] = MODE_PAGE_R_W_ERROR; 874 buf[9] = 16 - 10; 875 buf[10] = 0x00; 876 buf[11] = 0x05; 877 buf[12] = 0x00; 878 buf[13] = 0x00; 879 buf[14] = 0x00; 880 buf[15] = 0x00; 881 ide_atapi_cmd_reply(s, 16, max_len); 882 break; 883 case MODE_PAGE_AUDIO_CTL: 884 stw_be_p(&buf[0], 24 - 2); 885 buf[2] = 0x70; 886 buf[3] = 0; 887 buf[4] = 0; 888 buf[5] = 0; 889 buf[6] = 0; 890 buf[7] = 0; 891 892 buf[8] = MODE_PAGE_AUDIO_CTL; 893 buf[9] = 24 - 10; 894 /* Fill with CDROM audio volume */ 895 buf[17] = 0; 896 buf[19] = 0; 897 buf[21] = 0; 898 buf[23] = 0; 899 900 ide_atapi_cmd_reply(s, 24, max_len); 901 break; 902 case MODE_PAGE_CAPABILITIES: 903 stw_be_p(&buf[0], 30 - 2); 904 buf[2] = 0x70; 905 buf[3] = 0; 906 buf[4] = 0; 907 buf[5] = 0; 908 buf[6] = 0; 909 buf[7] = 0; 910 911 buf[8] = MODE_PAGE_CAPABILITIES; 912 buf[9] = 30 - 10; 913 buf[10] = 0x3b; /* read CDR/CDRW/DVDROM/DVDR/DVDRAM */ 914 buf[11] = 0x00; 915 916 /* Claim PLAY_AUDIO capability (0x01) since some Linux 917 code checks for this to automount media. */ 918 buf[12] = 0x71; 919 buf[13] = 3 << 5; 920 buf[14] = (1 << 0) | (1 << 3) | (1 << 5); 921 if (s->tray_locked) { 922 buf[14] |= 1 << 1; 923 } 924 buf[15] = 0x00; /* No volume & mute control, no changer */ 925 stw_be_p(&buf[16], 704); /* 4x read speed */ 926 buf[18] = 0; /* Two volume levels */ 927 buf[19] = 2; 928 stw_be_p(&buf[20], 512); /* 512k buffer */ 929 stw_be_p(&buf[22], 704); /* 4x read speed current */ 930 buf[24] = 0; 931 buf[25] = 0; 932 buf[26] = 0; 933 buf[27] = 0; 934 buf[28] = 0; 935 buf[29] = 0; 936 ide_atapi_cmd_reply(s, 30, max_len); 937 break; 938 default: 939 goto error_cmd; 940 } 941 break; 942 case 1: /* changeable values */ 943 goto error_cmd; 944 case 2: /* default values */ 945 goto error_cmd; 946 default: 947 case 3: /* saved values */ 948 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 949 ASC_SAVING_PARAMETERS_NOT_SUPPORTED); 950 break; 951 } 952 return; 953 954 error_cmd: 955 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET); 956 } 957 958 static void cmd_test_unit_ready(IDEState *s, uint8_t *buf) 959 { 960 /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we 961 * come here, we know that it's ready. */ 962 ide_atapi_cmd_ok(s); 963 } 964 965 static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf) 966 { 967 s->tray_locked = buf[4] & 1; 968 blk_lock_medium(s->blk, buf[4] & 1); 969 ide_atapi_cmd_ok(s); 970 } 971 972 static void cmd_read(IDEState *s, uint8_t* buf) 973 { 974 int nb_sectors, lba; 975 976 if (buf[0] == GPCMD_READ_10) { 977 nb_sectors = lduw_be_p(buf + 7); 978 } else { 979 nb_sectors = ldl_be_p(buf + 6); 980 } 981 982 lba = ldl_be_p(buf + 2); 983 if (nb_sectors == 0) { 984 ide_atapi_cmd_ok(s); 985 return; 986 } 987 988 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 989 } 990 991 static void cmd_read_cd(IDEState *s, uint8_t* buf) 992 { 993 int nb_sectors, lba, transfer_request; 994 995 nb_sectors = (buf[6] << 16) | (buf[7] << 8) | buf[8]; 996 lba = ldl_be_p(buf + 2); 997 998 if (nb_sectors == 0) { 999 ide_atapi_cmd_ok(s); 1000 return; 1001 } 1002 1003 transfer_request = buf[9] & 0xf8; 1004 if (transfer_request == 0x00) { 1005 /* nothing */ 1006 ide_atapi_cmd_ok(s); 1007 return; 1008 } 1009 1010 /* Check validity of BCL before transferring data */ 1011 if (!validate_bcl(s)) { 1012 return; 1013 } 1014 1015 switch (transfer_request) { 1016 case 0x10: 1017 /* normal read */ 1018 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 1019 break; 1020 case 0xf8: 1021 /* read all data */ 1022 ide_atapi_cmd_read(s, lba, nb_sectors, 2352); 1023 break; 1024 default: 1025 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1026 ASC_INV_FIELD_IN_CMD_PACKET); 1027 break; 1028 } 1029 } 1030 1031 static void cmd_seek(IDEState *s, uint8_t* buf) 1032 { 1033 unsigned int lba; 1034 uint64_t total_sectors = s->nb_sectors >> 2; 1035 1036 lba = ldl_be_p(buf + 2); 1037 if (lba >= total_sectors) { 1038 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR); 1039 return; 1040 } 1041 1042 ide_atapi_cmd_ok(s); 1043 } 1044 1045 static void cmd_start_stop_unit(IDEState *s, uint8_t* buf) 1046 { 1047 int sense; 1048 bool start = buf[4] & 1; 1049 bool loej = buf[4] & 2; /* load on start, eject on !start */ 1050 int pwrcnd = buf[4] & 0xf0; 1051 1052 if (pwrcnd) { 1053 /* eject/load only happens for power condition == 0 */ 1054 ide_atapi_cmd_ok(s); 1055 return; 1056 } 1057 1058 if (loej) { 1059 if (!start && !s->tray_open && s->tray_locked) { 1060 sense = blk_is_inserted(s->blk) 1061 ? NOT_READY : ILLEGAL_REQUEST; 1062 ide_atapi_cmd_error(s, sense, ASC_MEDIA_REMOVAL_PREVENTED); 1063 return; 1064 } 1065 1066 if (s->tray_open != !start) { 1067 blk_eject(s->blk, !start); 1068 s->tray_open = !start; 1069 } 1070 } 1071 1072 ide_atapi_cmd_ok(s); 1073 } 1074 1075 static void cmd_mechanism_status(IDEState *s, uint8_t* buf) 1076 { 1077 int max_len = lduw_be_p(buf + 8); 1078 1079 stw_be_p(buf, 0); 1080 /* no current LBA */ 1081 buf[2] = 0; 1082 buf[3] = 0; 1083 buf[4] = 0; 1084 buf[5] = 1; 1085 stw_be_p(buf + 6, 0); 1086 ide_atapi_cmd_reply(s, 8, max_len); 1087 } 1088 1089 static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf) 1090 { 1091 int format, msf, start_track, len; 1092 int max_len; 1093 uint64_t total_sectors = s->nb_sectors >> 2; 1094 1095 max_len = lduw_be_p(buf + 7); 1096 format = buf[9] >> 6; 1097 msf = (buf[1] >> 1) & 1; 1098 start_track = buf[6]; 1099 1100 switch(format) { 1101 case 0: 1102 len = cdrom_read_toc(total_sectors, buf, msf, start_track); 1103 if (len < 0) 1104 goto error_cmd; 1105 ide_atapi_cmd_reply(s, len, max_len); 1106 break; 1107 case 1: 1108 /* multi session : only a single session defined */ 1109 memset(buf, 0, 12); 1110 buf[1] = 0x0a; 1111 buf[2] = 0x01; 1112 buf[3] = 0x01; 1113 ide_atapi_cmd_reply(s, 12, max_len); 1114 break; 1115 case 2: 1116 len = cdrom_read_toc_raw(total_sectors, buf, msf, start_track); 1117 if (len < 0) 1118 goto error_cmd; 1119 ide_atapi_cmd_reply(s, len, max_len); 1120 break; 1121 default: 1122 error_cmd: 1123 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1124 ASC_INV_FIELD_IN_CMD_PACKET); 1125 } 1126 } 1127 1128 static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf) 1129 { 1130 uint64_t total_sectors = s->nb_sectors >> 2; 1131 1132 /* NOTE: it is really the number of sectors minus 1 */ 1133 stl_be_p(buf, total_sectors - 1); 1134 stl_be_p(buf + 4, 2048); 1135 ide_atapi_cmd_reply(s, 8, 8); 1136 } 1137 1138 static void cmd_read_disc_information(IDEState *s, uint8_t* buf) 1139 { 1140 uint8_t type = buf[1] & 7; 1141 uint32_t max_len = lduw_be_p(buf + 7); 1142 1143 /* Types 1/2 are only defined for Blu-Ray. */ 1144 if (type != 0) { 1145 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1146 ASC_INV_FIELD_IN_CMD_PACKET); 1147 return; 1148 } 1149 1150 memset(buf, 0, 34); 1151 buf[1] = 32; 1152 buf[2] = 0xe; /* last session complete, disc finalized */ 1153 buf[3] = 1; /* first track on disc */ 1154 buf[4] = 1; /* # of sessions */ 1155 buf[5] = 1; /* first track of last session */ 1156 buf[6] = 1; /* last track of last session */ 1157 buf[7] = 0x20; /* unrestricted use */ 1158 buf[8] = 0x00; /* CD-ROM or DVD-ROM */ 1159 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */ 1160 /* 12-23: not meaningful for CD-ROM or DVD-ROM */ 1161 /* 24-31: disc bar code */ 1162 /* 32: disc application code */ 1163 /* 33: number of OPC tables */ 1164 1165 ide_atapi_cmd_reply(s, 34, max_len); 1166 } 1167 1168 static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf) 1169 { 1170 int max_len; 1171 int media = buf[1]; 1172 int format = buf[7]; 1173 int ret; 1174 1175 max_len = lduw_be_p(buf + 8); 1176 1177 if (format < 0xff) { 1178 if (media_is_cd(s)) { 1179 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1180 ASC_INCOMPATIBLE_FORMAT); 1181 return; 1182 } else if (!media_present(s)) { 1183 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1184 ASC_INV_FIELD_IN_CMD_PACKET); 1185 return; 1186 } 1187 } 1188 1189 memset(buf, 0, max_len > IDE_DMA_BUF_SECTORS * 512 + 4 ? 1190 IDE_DMA_BUF_SECTORS * 512 + 4 : max_len); 1191 1192 switch (format) { 1193 case 0x00 ... 0x7f: 1194 case 0xff: 1195 if (media == 0) { 1196 ret = ide_dvd_read_structure(s, format, buf, buf); 1197 1198 if (ret < 0) { 1199 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, -ret); 1200 } else { 1201 ide_atapi_cmd_reply(s, ret, max_len); 1202 } 1203 1204 break; 1205 } 1206 /* TODO: BD support, fall through for now */ 1207 1208 /* Generic disk structures */ 1209 case 0x80: /* TODO: AACS volume identifier */ 1210 case 0x81: /* TODO: AACS media serial number */ 1211 case 0x82: /* TODO: AACS media identifier */ 1212 case 0x83: /* TODO: AACS media key block */ 1213 case 0x90: /* TODO: List of recognized format layers */ 1214 case 0xc0: /* TODO: Write protection status */ 1215 default: 1216 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1217 ASC_INV_FIELD_IN_CMD_PACKET); 1218 break; 1219 } 1220 } 1221 1222 static void cmd_set_speed(IDEState *s, uint8_t* buf) 1223 { 1224 ide_atapi_cmd_ok(s); 1225 } 1226 1227 enum { 1228 /* 1229 * Only commands flagged as ALLOW_UA are allowed to run under a 1230 * unit attention condition. (See MMC-5, section 4.1.6.1) 1231 */ 1232 ALLOW_UA = 0x01, 1233 1234 /* 1235 * Commands flagged with CHECK_READY can only execute if a medium is present. 1236 * Otherwise they report the Not Ready Condition. (See MMC-5, section 1237 * 4.1.8) 1238 */ 1239 CHECK_READY = 0x02, 1240 1241 /* 1242 * Commands flagged with NONDATA do not in any circumstances return 1243 * any data via ide_atapi_cmd_reply. These commands are exempt from 1244 * the normal byte_count_limit constraints. 1245 * See ATA8-ACS3 "7.21.5 Byte Count Limit" 1246 */ 1247 NONDATA = 0x04, 1248 1249 /* 1250 * CONDDATA implies a command that transfers data only conditionally based 1251 * on the presence of suboptions. It should be exempt from the BCL check at 1252 * command validation time, but it needs to be checked at the command 1253 * handler level instead. 1254 */ 1255 CONDDATA = 0x08, 1256 }; 1257 1258 static const struct AtapiCmd { 1259 void (*handler)(IDEState *s, uint8_t *buf); 1260 int flags; 1261 } atapi_cmd_table[0x100] = { 1262 [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY | NONDATA }, 1263 [ 0x03 ] = { cmd_request_sense, ALLOW_UA }, 1264 [ 0x12 ] = { cmd_inquiry, ALLOW_UA }, 1265 [ 0x1b ] = { cmd_start_stop_unit, NONDATA }, /* [1] */ 1266 [ 0x1e ] = { cmd_prevent_allow_medium_removal, NONDATA }, 1267 [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY }, 1268 [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY }, 1269 [ 0x2b ] = { cmd_seek, CHECK_READY | NONDATA }, 1270 [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY }, 1271 [ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, 1272 [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, 1273 [ 0x51 ] = { cmd_read_disc_information, CHECK_READY }, 1274 [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, 1275 [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY }, 1276 [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY }, 1277 [ 0xbb ] = { cmd_set_speed, NONDATA }, 1278 [ 0xbd ] = { cmd_mechanism_status, 0 }, 1279 [ 0xbe ] = { cmd_read_cd, CHECK_READY | CONDDATA }, 1280 /* [1] handler detects and reports not ready condition itself */ 1281 }; 1282 1283 void ide_atapi_cmd(IDEState *s) 1284 { 1285 uint8_t *buf = s->io_buffer; 1286 const struct AtapiCmd *cmd = &atapi_cmd_table[s->io_buffer[0]]; 1287 1288 trace_ide_atapi_cmd(s, s->io_buffer[0]); 1289 1290 if (trace_event_get_state_backends(TRACE_IDE_ATAPI_CMD_PACKET)) { 1291 /* Each pretty-printed byte needs two bytes and a space; */ 1292 char *ppacket = g_malloc(ATAPI_PACKET_SIZE * 3 + 1); 1293 int i; 1294 for (i = 0; i < ATAPI_PACKET_SIZE; i++) { 1295 sprintf(ppacket + (i * 3), "%02x ", buf[i]); 1296 } 1297 trace_ide_atapi_cmd_packet(s, s->lcyl | (s->hcyl << 8), ppacket); 1298 g_free(ppacket); 1299 } 1300 1301 /* 1302 * If there's a UNIT_ATTENTION condition pending, only command flagged with 1303 * ALLOW_UA are allowed to complete. with other commands getting a CHECK 1304 * condition response unless a higher priority status, defined by the drive 1305 * here, is pending. 1306 */ 1307 if (s->sense_key == UNIT_ATTENTION && !(cmd->flags & ALLOW_UA)) { 1308 ide_atapi_cmd_check_status(s); 1309 return; 1310 } 1311 /* 1312 * When a CD gets changed, we have to report an ejected state and 1313 * then a loaded state to guests so that they detect tray 1314 * open/close and media change events. Guests that do not use 1315 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close 1316 * states rely on this behavior. 1317 */ 1318 if (!(cmd->flags & ALLOW_UA) && 1319 !s->tray_open && blk_is_inserted(s->blk) && s->cdrom_changed) { 1320 1321 if (s->cdrom_changed == 1) { 1322 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1323 s->cdrom_changed = 2; 1324 } else { 1325 ide_atapi_cmd_error(s, UNIT_ATTENTION, ASC_MEDIUM_MAY_HAVE_CHANGED); 1326 s->cdrom_changed = 0; 1327 } 1328 1329 return; 1330 } 1331 1332 /* Report a Not Ready condition if appropriate for the command */ 1333 if ((cmd->flags & CHECK_READY) && 1334 (!media_present(s) || !blk_is_inserted(s->blk))) 1335 { 1336 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1337 return; 1338 } 1339 1340 /* Commands that don't transfer DATA permit the byte_count_limit to be 0. 1341 * If this is a data-transferring PIO command and BCL is 0, 1342 * we abort at the /ATA/ level, not the ATAPI level. 1343 * See ATA8 ACS3 section 7.17.6.49 and 7.21.5 */ 1344 if (cmd->handler && !(cmd->flags & (NONDATA | CONDDATA))) { 1345 if (!validate_bcl(s)) { 1346 return; 1347 } 1348 } 1349 1350 /* Execute the command */ 1351 if (cmd->handler) { 1352 cmd->handler(s, buf); 1353 return; 1354 } 1355 1356 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE); 1357 } 1358