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 assert(size <= s->io_buffer_total_len); 280 assert(s->io_buffer_index <= s->io_buffer_total_len); 281 282 /* Some adapters process PIO data right away. In that case, we need 283 * to avoid mutual recursion between ide_transfer_start 284 * and ide_atapi_cmd_reply_end. 285 */ 286 if (!ide_transfer_start_norecurse(s, 287 s->io_buffer + s->io_buffer_index - size, 288 size, ide_atapi_cmd_reply_end)) { 289 return; 290 } 291 } 292 293 /* end of transfer */ 294 trace_ide_atapi_cmd_reply_end_eot(s, s->status); 295 ide_atapi_cmd_ok(s); 296 ide_set_irq(s->bus); 297 } 298 299 /* send a reply of 'size' bytes in s->io_buffer to an ATAPI command */ 300 static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size) 301 { 302 if (size > max_size) 303 size = max_size; 304 s->lba = -1; /* no sector read */ 305 s->packet_transfer_size = size; 306 s->io_buffer_size = size; /* dma: send the reply data as one chunk */ 307 s->elementary_transfer_size = 0; 308 309 if (s->atapi_dma) { 310 block_acct_start(blk_get_stats(s->blk), &s->acct, size, 311 BLOCK_ACCT_READ); 312 s->status = READY_STAT | SEEK_STAT | DRQ_STAT; 313 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 314 } else { 315 s->status = READY_STAT | SEEK_STAT; 316 s->io_buffer_index = 0; 317 ide_atapi_cmd_reply_end(s); 318 } 319 } 320 321 /* start a CD-CDROM read command */ 322 static void ide_atapi_cmd_read_pio(IDEState *s, int lba, int nb_sectors, 323 int sector_size) 324 { 325 s->lba = lba; 326 s->packet_transfer_size = nb_sectors * sector_size; 327 s->elementary_transfer_size = 0; 328 s->io_buffer_index = sector_size; 329 s->cd_sector_size = sector_size; 330 331 ide_atapi_cmd_reply_end(s); 332 } 333 334 static void ide_atapi_cmd_check_status(IDEState *s) 335 { 336 trace_ide_atapi_cmd_check_status(s); 337 s->error = MC_ERR | (UNIT_ATTENTION << 4); 338 s->status = ERR_STAT; 339 s->nsector = 0; 340 ide_set_irq(s->bus); 341 } 342 /* ATAPI DMA support */ 343 344 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret) 345 { 346 IDEState *s = opaque; 347 int data_offset, n; 348 349 if (ret < 0) { 350 if (ide_handle_rw_error(s, -ret, ide_dma_cmd_to_retry(s->dma_cmd))) { 351 if (s->bus->error_status) { 352 s->bus->dma->aiocb = NULL; 353 return; 354 } 355 goto eot; 356 } 357 } 358 359 if (s->io_buffer_size > 0) { 360 /* 361 * For a cdrom read sector command (s->lba != -1), 362 * adjust the lba for the next s->io_buffer_size chunk 363 * and dma the current chunk. 364 * For a command != read (s->lba == -1), just transfer 365 * the reply data. 366 */ 367 if (s->lba != -1) { 368 if (s->cd_sector_size == 2352) { 369 n = 1; 370 cd_data_to_raw(s->io_buffer, s->lba); 371 } else { 372 n = s->io_buffer_size >> 11; 373 } 374 s->lba += n; 375 } 376 s->packet_transfer_size -= s->io_buffer_size; 377 if (s->bus->dma->ops->rw_buf(s->bus->dma, 1) == 0) 378 goto eot; 379 } 380 381 if (s->packet_transfer_size <= 0) { 382 s->status = READY_STAT | SEEK_STAT; 383 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 384 ide_set_irq(s->bus); 385 goto eot; 386 } 387 388 s->io_buffer_index = 0; 389 if (s->cd_sector_size == 2352) { 390 n = 1; 391 s->io_buffer_size = s->cd_sector_size; 392 data_offset = 16; 393 } else { 394 n = s->packet_transfer_size >> 11; 395 if (n > (IDE_DMA_BUF_SECTORS / 4)) 396 n = (IDE_DMA_BUF_SECTORS / 4); 397 s->io_buffer_size = n * 2048; 398 data_offset = 0; 399 } 400 trace_ide_atapi_cmd_read_dma_cb_aio(s, s->lba, n); 401 qemu_iovec_init_buf(&s->bus->dma->qiov, s->io_buffer + data_offset, 402 n * ATAPI_SECTOR_SIZE); 403 404 s->bus->dma->aiocb = ide_buffered_readv(s, (int64_t)s->lba << 2, 405 &s->bus->dma->qiov, n * 4, 406 ide_atapi_cmd_read_dma_cb, s); 407 return; 408 409 eot: 410 if (ret < 0) { 411 block_acct_failed(blk_get_stats(s->blk), &s->acct); 412 } else { 413 block_acct_done(blk_get_stats(s->blk), &s->acct); 414 } 415 ide_set_inactive(s, false); 416 } 417 418 /* start a CD-CDROM read command with DMA */ 419 /* XXX: test if DMA is available */ 420 static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors, 421 int sector_size) 422 { 423 s->lba = lba; 424 s->packet_transfer_size = nb_sectors * sector_size; 425 s->io_buffer_size = 0; 426 s->cd_sector_size = sector_size; 427 428 block_acct_start(blk_get_stats(s->blk), &s->acct, s->packet_transfer_size, 429 BLOCK_ACCT_READ); 430 431 /* XXX: check if BUSY_STAT should be set */ 432 s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT; 433 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 434 } 435 436 static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors, 437 int sector_size) 438 { 439 trace_ide_atapi_cmd_read(s, s->atapi_dma ? "dma" : "pio", 440 lba, nb_sectors); 441 if (s->atapi_dma) { 442 ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size); 443 } else { 444 ide_atapi_cmd_read_pio(s, lba, nb_sectors, sector_size); 445 } 446 } 447 448 void ide_atapi_dma_restart(IDEState *s) 449 { 450 /* 451 * At this point we can just re-evaluate the packet command and start over. 452 * The presence of ->dma_cb callback in the pre_save ensures that the packet 453 * command has been completely sent and we can safely restart command. 454 */ 455 s->unit = s->bus->retry_unit; 456 s->bus->dma->ops->restart_dma(s->bus->dma); 457 ide_atapi_cmd(s); 458 } 459 460 static inline uint8_t ide_atapi_set_profile(uint8_t *buf, uint8_t *index, 461 uint16_t profile) 462 { 463 uint8_t *buf_profile = buf + 12; /* start of profiles */ 464 465 buf_profile += ((*index) * 4); /* start of indexed profile */ 466 stw_be_p(buf_profile, profile); 467 buf_profile[2] = ((buf_profile[0] == buf[6]) && (buf_profile[1] == buf[7])); 468 469 /* each profile adds 4 bytes to the response */ 470 (*index)++; 471 buf[11] += 4; /* Additional Length */ 472 473 return 4; 474 } 475 476 static int ide_dvd_read_structure(IDEState *s, int format, 477 const uint8_t *packet, uint8_t *buf) 478 { 479 switch (format) { 480 case 0x0: /* Physical format information */ 481 { 482 int layer = packet[6]; 483 uint64_t total_sectors; 484 485 if (layer != 0) 486 return -ASC_INV_FIELD_IN_CMD_PACKET; 487 488 total_sectors = s->nb_sectors >> 2; 489 if (total_sectors == 0) { 490 return -ASC_MEDIUM_NOT_PRESENT; 491 } 492 493 buf[4] = 1; /* DVD-ROM, part version 1 */ 494 buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ 495 buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ 496 buf[7] = 0; /* default densities */ 497 498 /* FIXME: 0x30000 per spec? */ 499 stl_be_p(buf + 8, 0); /* start sector */ 500 stl_be_p(buf + 12, total_sectors - 1); /* end sector */ 501 stl_be_p(buf + 16, total_sectors - 1); /* l0 end sector */ 502 503 /* Size of buffer, not including 2 byte size field */ 504 stw_be_p(buf, 2048 + 2); 505 506 /* 2k data + 4 byte header */ 507 return (2048 + 4); 508 } 509 510 case 0x01: /* DVD copyright information */ 511 buf[4] = 0; /* no copyright data */ 512 buf[5] = 0; /* no region restrictions */ 513 514 /* Size of buffer, not including 2 byte size field */ 515 stw_be_p(buf, 4 + 2); 516 517 /* 4 byte header + 4 byte data */ 518 return (4 + 4); 519 520 case 0x03: /* BCA information - invalid field for no BCA info */ 521 return -ASC_INV_FIELD_IN_CMD_PACKET; 522 523 case 0x04: /* DVD disc manufacturing information */ 524 /* Size of buffer, not including 2 byte size field */ 525 stw_be_p(buf, 2048 + 2); 526 527 /* 2k data + 4 byte header */ 528 return (2048 + 4); 529 530 case 0xff: 531 /* 532 * This lists all the command capabilities above. Add new ones 533 * in order and update the length and buffer return values. 534 */ 535 536 buf[4] = 0x00; /* Physical format */ 537 buf[5] = 0x40; /* Not writable, is readable */ 538 stw_be_p(buf + 6, 2048 + 4); 539 540 buf[8] = 0x01; /* Copyright info */ 541 buf[9] = 0x40; /* Not writable, is readable */ 542 stw_be_p(buf + 10, 4 + 4); 543 544 buf[12] = 0x03; /* BCA info */ 545 buf[13] = 0x40; /* Not writable, is readable */ 546 stw_be_p(buf + 14, 188 + 4); 547 548 buf[16] = 0x04; /* Manufacturing info */ 549 buf[17] = 0x40; /* Not writable, is readable */ 550 stw_be_p(buf + 18, 2048 + 4); 551 552 /* Size of buffer, not including 2 byte size field */ 553 stw_be_p(buf, 16 + 2); 554 555 /* data written + 4 byte header */ 556 return (16 + 4); 557 558 default: /* TODO: formats beyond DVD-ROM requires */ 559 return -ASC_INV_FIELD_IN_CMD_PACKET; 560 } 561 } 562 563 static unsigned int event_status_media(IDEState *s, 564 uint8_t *buf) 565 { 566 uint8_t event_code, media_status; 567 568 media_status = 0; 569 if (s->tray_open) { 570 media_status = MS_TRAY_OPEN; 571 } else if (blk_is_inserted(s->blk)) { 572 media_status = MS_MEDIA_PRESENT; 573 } 574 575 /* Event notification descriptor */ 576 event_code = MEC_NO_CHANGE; 577 if (media_status != MS_TRAY_OPEN) { 578 if (s->events.new_media) { 579 event_code = MEC_NEW_MEDIA; 580 s->events.new_media = false; 581 } else if (s->events.eject_request) { 582 event_code = MEC_EJECT_REQUESTED; 583 s->events.eject_request = false; 584 } 585 } 586 587 buf[4] = event_code; 588 buf[5] = media_status; 589 590 /* These fields are reserved, just clear them. */ 591 buf[6] = 0; 592 buf[7] = 0; 593 594 return 8; /* We wrote to 4 extra bytes from the header */ 595 } 596 597 /* 598 * Before transferring data or otherwise signalling acceptance of a command 599 * marked CONDDATA, we must check the validity of the byte_count_limit. 600 */ 601 static bool validate_bcl(IDEState *s) 602 { 603 /* TODO: Check IDENTIFY data word 125 for defacult BCL (currently 0) */ 604 if (s->atapi_dma || atapi_byte_count_limit(s)) { 605 return true; 606 } 607 608 /* TODO: Move abort back into core.c and introduce proper error flow between 609 * ATAPI layer and IDE core layer */ 610 ide_abort_command(s); 611 return false; 612 } 613 614 static void cmd_get_event_status_notification(IDEState *s, 615 uint8_t *buf) 616 { 617 const uint8_t *packet = buf; 618 619 struct { 620 uint8_t opcode; 621 uint8_t polled; /* lsb bit is polled; others are reserved */ 622 uint8_t reserved2[2]; 623 uint8_t class; 624 uint8_t reserved3[2]; 625 uint16_t len; 626 uint8_t control; 627 } QEMU_PACKED *gesn_cdb; 628 629 struct { 630 uint16_t len; 631 uint8_t notification_class; 632 uint8_t supported_events; 633 } QEMU_PACKED *gesn_event_header; 634 unsigned int max_len, used_len; 635 636 gesn_cdb = (void *)packet; 637 gesn_event_header = (void *)buf; 638 639 max_len = be16_to_cpu(gesn_cdb->len); 640 641 /* It is fine by the MMC spec to not support async mode operations */ 642 if (!(gesn_cdb->polled & 0x01)) { /* asynchronous mode */ 643 /* Only polling is supported, asynchronous mode is not. */ 644 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 645 ASC_INV_FIELD_IN_CMD_PACKET); 646 return; 647 } 648 649 /* polling mode operation */ 650 651 /* 652 * These are the supported events. 653 * 654 * We currently only support requests of the 'media' type. 655 * Notification class requests and supported event classes are bitmasks, 656 * but they are build from the same values as the "notification class" 657 * field. 658 */ 659 gesn_event_header->supported_events = 1 << GESN_MEDIA; 660 661 /* 662 * We use |= below to set the class field; other bits in this byte 663 * are reserved now but this is useful to do if we have to use the 664 * reserved fields later. 665 */ 666 gesn_event_header->notification_class = 0; 667 668 /* 669 * Responses to requests are to be based on request priority. The 670 * notification_class_request_type enum above specifies the 671 * priority: upper elements are higher prio than lower ones. 672 */ 673 if (gesn_cdb->class & (1 << GESN_MEDIA)) { 674 gesn_event_header->notification_class |= GESN_MEDIA; 675 used_len = event_status_media(s, buf); 676 } else { 677 gesn_event_header->notification_class = 0x80; /* No event available */ 678 used_len = sizeof(*gesn_event_header); 679 } 680 gesn_event_header->len = cpu_to_be16(used_len 681 - sizeof(*gesn_event_header)); 682 ide_atapi_cmd_reply(s, used_len, max_len); 683 } 684 685 static void cmd_request_sense(IDEState *s, uint8_t *buf) 686 { 687 int max_len = buf[4]; 688 689 memset(buf, 0, 18); 690 buf[0] = 0x70 | (1 << 7); 691 buf[2] = s->sense_key; 692 buf[7] = 10; 693 buf[12] = s->asc; 694 695 if (s->sense_key == UNIT_ATTENTION) { 696 s->sense_key = NO_SENSE; 697 } 698 699 ide_atapi_cmd_reply(s, 18, max_len); 700 } 701 702 static void cmd_inquiry(IDEState *s, uint8_t *buf) 703 { 704 uint8_t page_code = buf[2]; 705 int max_len = buf[4]; 706 707 unsigned idx = 0; 708 unsigned size_idx; 709 unsigned preamble_len; 710 711 /* If the EVPD (Enable Vital Product Data) bit is set in byte 1, 712 * we are being asked for a specific page of info indicated by byte 2. */ 713 if (buf[1] & 0x01) { 714 preamble_len = 4; 715 size_idx = 3; 716 717 buf[idx++] = 0x05; /* CD-ROM */ 718 buf[idx++] = page_code; /* Page Code */ 719 buf[idx++] = 0x00; /* reserved */ 720 idx++; /* length (set later) */ 721 722 switch (page_code) { 723 case 0x00: 724 /* Supported Pages: List of supported VPD responses. */ 725 buf[idx++] = 0x00; /* 0x00: Supported Pages, and: */ 726 buf[idx++] = 0x83; /* 0x83: Device Identification. */ 727 break; 728 729 case 0x83: 730 /* Device Identification. Each entry is optional, but the entries 731 * included here are modeled after libata's VPD responses. 732 * If the response is given, at least one entry must be present. */ 733 734 /* Entry 1: Serial */ 735 if (idx + 24 > max_len) { 736 /* Not enough room for even the first entry: */ 737 /* 4 byte header + 20 byte string */ 738 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 739 ASC_DATA_PHASE_ERROR); 740 return; 741 } 742 buf[idx++] = 0x02; /* Ascii */ 743 buf[idx++] = 0x00; /* Vendor Specific */ 744 buf[idx++] = 0x00; 745 buf[idx++] = 20; /* Remaining length */ 746 padstr8(buf + idx, 20, s->drive_serial_str); 747 idx += 20; 748 749 /* Entry 2: Drive Model and Serial */ 750 if (idx + 72 > max_len) { 751 /* 4 (header) + 8 (vendor) + 60 (model & serial) */ 752 goto out; 753 } 754 buf[idx++] = 0x02; /* Ascii */ 755 buf[idx++] = 0x01; /* T10 Vendor */ 756 buf[idx++] = 0x00; 757 buf[idx++] = 68; 758 padstr8(buf + idx, 8, "ATA"); /* Generic T10 vendor */ 759 idx += 8; 760 padstr8(buf + idx, 40, s->drive_model_str); 761 idx += 40; 762 padstr8(buf + idx, 20, s->drive_serial_str); 763 idx += 20; 764 765 /* Entry 3: WWN */ 766 if (s->wwn && (idx + 12 <= max_len)) { 767 /* 4 byte header + 8 byte wwn */ 768 buf[idx++] = 0x01; /* Binary */ 769 buf[idx++] = 0x03; /* NAA */ 770 buf[idx++] = 0x00; 771 buf[idx++] = 0x08; 772 stq_be_p(&buf[idx], s->wwn); 773 idx += 8; 774 } 775 break; 776 777 default: 778 /* SPC-3, revision 23 sec. 6.4 */ 779 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 780 ASC_INV_FIELD_IN_CMD_PACKET); 781 return; 782 } 783 } else { 784 preamble_len = 5; 785 size_idx = 4; 786 787 buf[0] = 0x05; /* CD-ROM */ 788 buf[1] = 0x80; /* removable */ 789 buf[2] = 0x00; /* ISO */ 790 buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */ 791 /* buf[size_idx] set below. */ 792 buf[5] = 0; /* reserved */ 793 buf[6] = 0; /* reserved */ 794 buf[7] = 0; /* reserved */ 795 padstr8(buf + 8, 8, "QEMU"); 796 padstr8(buf + 16, 16, "QEMU DVD-ROM"); 797 padstr8(buf + 32, 4, s->version); 798 idx = 36; 799 } 800 801 out: 802 buf[size_idx] = idx - preamble_len; 803 ide_atapi_cmd_reply(s, idx, max_len); 804 } 805 806 static void cmd_get_configuration(IDEState *s, uint8_t *buf) 807 { 808 uint32_t len; 809 uint8_t index = 0; 810 int max_len; 811 812 /* only feature 0 is supported */ 813 if (buf[2] != 0 || buf[3] != 0) { 814 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 815 ASC_INV_FIELD_IN_CMD_PACKET); 816 return; 817 } 818 819 /* XXX: could result in alignment problems in some architectures */ 820 max_len = lduw_be_p(buf + 7); 821 822 /* 823 * XXX: avoid overflow for io_buffer if max_len is bigger than 824 * the size of that buffer (dimensioned to max number of 825 * sectors to transfer at once) 826 * 827 * Only a problem if the feature/profiles grow. 828 */ 829 if (max_len > BDRV_SECTOR_SIZE) { 830 /* XXX: assume 1 sector */ 831 max_len = BDRV_SECTOR_SIZE; 832 } 833 834 memset(buf, 0, max_len); 835 /* 836 * the number of sectors from the media tells us which profile 837 * to use as current. 0 means there is no media 838 */ 839 if (media_is_dvd(s)) { 840 stw_be_p(buf + 6, MMC_PROFILE_DVD_ROM); 841 } else if (media_is_cd(s)) { 842 stw_be_p(buf + 6, MMC_PROFILE_CD_ROM); 843 } 844 845 buf[10] = 0x02 | 0x01; /* persistent and current */ 846 len = 12; /* headers: 8 + 4 */ 847 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_DVD_ROM); 848 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_CD_ROM); 849 stl_be_p(buf, len - 4); /* data length */ 850 851 ide_atapi_cmd_reply(s, len, max_len); 852 } 853 854 static void cmd_mode_sense(IDEState *s, uint8_t *buf) 855 { 856 int action, code; 857 int max_len; 858 859 max_len = lduw_be_p(buf + 7); 860 action = buf[2] >> 6; 861 code = buf[2] & 0x3f; 862 863 switch(action) { 864 case 0: /* current values */ 865 switch(code) { 866 case MODE_PAGE_R_W_ERROR: /* error recovery */ 867 stw_be_p(&buf[0], 16 - 2); 868 buf[2] = 0x70; 869 buf[3] = 0; 870 buf[4] = 0; 871 buf[5] = 0; 872 buf[6] = 0; 873 buf[7] = 0; 874 875 buf[8] = MODE_PAGE_R_W_ERROR; 876 buf[9] = 16 - 10; 877 buf[10] = 0x00; 878 buf[11] = 0x05; 879 buf[12] = 0x00; 880 buf[13] = 0x00; 881 buf[14] = 0x00; 882 buf[15] = 0x00; 883 ide_atapi_cmd_reply(s, 16, max_len); 884 break; 885 case MODE_PAGE_AUDIO_CTL: 886 stw_be_p(&buf[0], 24 - 2); 887 buf[2] = 0x70; 888 buf[3] = 0; 889 buf[4] = 0; 890 buf[5] = 0; 891 buf[6] = 0; 892 buf[7] = 0; 893 894 buf[8] = MODE_PAGE_AUDIO_CTL; 895 buf[9] = 24 - 10; 896 /* Fill with CDROM audio volume */ 897 buf[17] = 0; 898 buf[19] = 0; 899 buf[21] = 0; 900 buf[23] = 0; 901 902 ide_atapi_cmd_reply(s, 24, max_len); 903 break; 904 case MODE_PAGE_CAPABILITIES: 905 stw_be_p(&buf[0], 30 - 2); 906 buf[2] = 0x70; 907 buf[3] = 0; 908 buf[4] = 0; 909 buf[5] = 0; 910 buf[6] = 0; 911 buf[7] = 0; 912 913 buf[8] = MODE_PAGE_CAPABILITIES; 914 buf[9] = 30 - 10; 915 buf[10] = 0x3b; /* read CDR/CDRW/DVDROM/DVDR/DVDRAM */ 916 buf[11] = 0x00; 917 918 /* Claim PLAY_AUDIO capability (0x01) since some Linux 919 code checks for this to automount media. */ 920 buf[12] = 0x71; 921 buf[13] = 3 << 5; 922 buf[14] = (1 << 0) | (1 << 3) | (1 << 5); 923 if (s->tray_locked) { 924 buf[14] |= 1 << 1; 925 } 926 buf[15] = 0x00; /* No volume & mute control, no changer */ 927 stw_be_p(&buf[16], 704); /* 4x read speed */ 928 buf[18] = 0; /* Two volume levels */ 929 buf[19] = 2; 930 stw_be_p(&buf[20], 512); /* 512k buffer */ 931 stw_be_p(&buf[22], 704); /* 4x read speed current */ 932 buf[24] = 0; 933 buf[25] = 0; 934 buf[26] = 0; 935 buf[27] = 0; 936 buf[28] = 0; 937 buf[29] = 0; 938 ide_atapi_cmd_reply(s, 30, max_len); 939 break; 940 default: 941 goto error_cmd; 942 } 943 break; 944 case 1: /* changeable values */ 945 goto error_cmd; 946 case 2: /* default values */ 947 goto error_cmd; 948 default: 949 case 3: /* saved values */ 950 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 951 ASC_SAVING_PARAMETERS_NOT_SUPPORTED); 952 break; 953 } 954 return; 955 956 error_cmd: 957 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET); 958 } 959 960 static void cmd_test_unit_ready(IDEState *s, uint8_t *buf) 961 { 962 /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we 963 * come here, we know that it's ready. */ 964 ide_atapi_cmd_ok(s); 965 } 966 967 static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf) 968 { 969 s->tray_locked = buf[4] & 1; 970 blk_lock_medium(s->blk, buf[4] & 1); 971 ide_atapi_cmd_ok(s); 972 } 973 974 static void cmd_read(IDEState *s, uint8_t* buf) 975 { 976 int nb_sectors, lba; 977 978 if (buf[0] == GPCMD_READ_10) { 979 nb_sectors = lduw_be_p(buf + 7); 980 } else { 981 nb_sectors = ldl_be_p(buf + 6); 982 } 983 984 lba = ldl_be_p(buf + 2); 985 if (nb_sectors == 0) { 986 ide_atapi_cmd_ok(s); 987 return; 988 } 989 990 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 991 } 992 993 static void cmd_read_cd(IDEState *s, uint8_t* buf) 994 { 995 int nb_sectors, lba, transfer_request; 996 997 nb_sectors = (buf[6] << 16) | (buf[7] << 8) | buf[8]; 998 lba = ldl_be_p(buf + 2); 999 1000 if (nb_sectors == 0) { 1001 ide_atapi_cmd_ok(s); 1002 return; 1003 } 1004 1005 transfer_request = buf[9] & 0xf8; 1006 if (transfer_request == 0x00) { 1007 /* nothing */ 1008 ide_atapi_cmd_ok(s); 1009 return; 1010 } 1011 1012 /* Check validity of BCL before transferring data */ 1013 if (!validate_bcl(s)) { 1014 return; 1015 } 1016 1017 switch (transfer_request) { 1018 case 0x10: 1019 /* normal read */ 1020 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 1021 break; 1022 case 0xf8: 1023 /* read all data */ 1024 ide_atapi_cmd_read(s, lba, nb_sectors, 2352); 1025 break; 1026 default: 1027 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1028 ASC_INV_FIELD_IN_CMD_PACKET); 1029 break; 1030 } 1031 } 1032 1033 static void cmd_seek(IDEState *s, uint8_t* buf) 1034 { 1035 unsigned int lba; 1036 uint64_t total_sectors = s->nb_sectors >> 2; 1037 1038 lba = ldl_be_p(buf + 2); 1039 if (lba >= total_sectors) { 1040 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR); 1041 return; 1042 } 1043 1044 ide_atapi_cmd_ok(s); 1045 } 1046 1047 static void cmd_start_stop_unit(IDEState *s, uint8_t* buf) 1048 { 1049 int sense; 1050 bool start = buf[4] & 1; 1051 bool loej = buf[4] & 2; /* load on start, eject on !start */ 1052 int pwrcnd = buf[4] & 0xf0; 1053 1054 if (pwrcnd) { 1055 /* eject/load only happens for power condition == 0 */ 1056 ide_atapi_cmd_ok(s); 1057 return; 1058 } 1059 1060 if (loej) { 1061 if (!start && !s->tray_open && s->tray_locked) { 1062 sense = blk_is_inserted(s->blk) 1063 ? NOT_READY : ILLEGAL_REQUEST; 1064 ide_atapi_cmd_error(s, sense, ASC_MEDIA_REMOVAL_PREVENTED); 1065 return; 1066 } 1067 1068 if (s->tray_open != !start) { 1069 blk_eject(s->blk, !start); 1070 s->tray_open = !start; 1071 } 1072 } 1073 1074 ide_atapi_cmd_ok(s); 1075 } 1076 1077 static void cmd_mechanism_status(IDEState *s, uint8_t* buf) 1078 { 1079 int max_len = lduw_be_p(buf + 8); 1080 1081 stw_be_p(buf, 0); 1082 /* no current LBA */ 1083 buf[2] = 0; 1084 buf[3] = 0; 1085 buf[4] = 0; 1086 buf[5] = 1; 1087 stw_be_p(buf + 6, 0); 1088 ide_atapi_cmd_reply(s, 8, max_len); 1089 } 1090 1091 static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf) 1092 { 1093 int format, msf, start_track, len; 1094 int max_len; 1095 uint64_t total_sectors = s->nb_sectors >> 2; 1096 1097 max_len = lduw_be_p(buf + 7); 1098 format = buf[9] >> 6; 1099 msf = (buf[1] >> 1) & 1; 1100 start_track = buf[6]; 1101 1102 switch(format) { 1103 case 0: 1104 len = cdrom_read_toc(total_sectors, buf, msf, start_track); 1105 if (len < 0) 1106 goto error_cmd; 1107 ide_atapi_cmd_reply(s, len, max_len); 1108 break; 1109 case 1: 1110 /* multi session : only a single session defined */ 1111 memset(buf, 0, 12); 1112 buf[1] = 0x0a; 1113 buf[2] = 0x01; 1114 buf[3] = 0x01; 1115 ide_atapi_cmd_reply(s, 12, max_len); 1116 break; 1117 case 2: 1118 len = cdrom_read_toc_raw(total_sectors, buf, msf, start_track); 1119 if (len < 0) 1120 goto error_cmd; 1121 ide_atapi_cmd_reply(s, len, max_len); 1122 break; 1123 default: 1124 error_cmd: 1125 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1126 ASC_INV_FIELD_IN_CMD_PACKET); 1127 } 1128 } 1129 1130 static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf) 1131 { 1132 uint64_t total_sectors = s->nb_sectors >> 2; 1133 1134 /* NOTE: it is really the number of sectors minus 1 */ 1135 stl_be_p(buf, total_sectors - 1); 1136 stl_be_p(buf + 4, 2048); 1137 ide_atapi_cmd_reply(s, 8, 8); 1138 } 1139 1140 static void cmd_read_disc_information(IDEState *s, uint8_t* buf) 1141 { 1142 uint8_t type = buf[1] & 7; 1143 uint32_t max_len = lduw_be_p(buf + 7); 1144 1145 /* Types 1/2 are only defined for Blu-Ray. */ 1146 if (type != 0) { 1147 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1148 ASC_INV_FIELD_IN_CMD_PACKET); 1149 return; 1150 } 1151 1152 memset(buf, 0, 34); 1153 buf[1] = 32; 1154 buf[2] = 0xe; /* last session complete, disc finalized */ 1155 buf[3] = 1; /* first track on disc */ 1156 buf[4] = 1; /* # of sessions */ 1157 buf[5] = 1; /* first track of last session */ 1158 buf[6] = 1; /* last track of last session */ 1159 buf[7] = 0x20; /* unrestricted use */ 1160 buf[8] = 0x00; /* CD-ROM or DVD-ROM */ 1161 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */ 1162 /* 12-23: not meaningful for CD-ROM or DVD-ROM */ 1163 /* 24-31: disc bar code */ 1164 /* 32: disc application code */ 1165 /* 33: number of OPC tables */ 1166 1167 ide_atapi_cmd_reply(s, 34, max_len); 1168 } 1169 1170 static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf) 1171 { 1172 int max_len; 1173 int media = buf[1]; 1174 int format = buf[7]; 1175 int ret; 1176 1177 max_len = lduw_be_p(buf + 8); 1178 1179 if (format < 0xff) { 1180 if (media_is_cd(s)) { 1181 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1182 ASC_INCOMPATIBLE_FORMAT); 1183 return; 1184 } else if (!media_present(s)) { 1185 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1186 ASC_INV_FIELD_IN_CMD_PACKET); 1187 return; 1188 } 1189 } 1190 1191 memset(buf, 0, max_len > IDE_DMA_BUF_SECTORS * BDRV_SECTOR_SIZE + 4 ? 1192 IDE_DMA_BUF_SECTORS * BDRV_SECTOR_SIZE + 4 : max_len); 1193 1194 switch (format) { 1195 case 0x00 ... 0x7f: 1196 case 0xff: 1197 if (media == 0) { 1198 ret = ide_dvd_read_structure(s, format, buf, buf); 1199 1200 if (ret < 0) { 1201 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, -ret); 1202 } else { 1203 ide_atapi_cmd_reply(s, ret, max_len); 1204 } 1205 1206 break; 1207 } 1208 /* TODO: BD support, fall through for now */ 1209 1210 /* Generic disk structures */ 1211 case 0x80: /* TODO: AACS volume identifier */ 1212 case 0x81: /* TODO: AACS media serial number */ 1213 case 0x82: /* TODO: AACS media identifier */ 1214 case 0x83: /* TODO: AACS media key block */ 1215 case 0x90: /* TODO: List of recognized format layers */ 1216 case 0xc0: /* TODO: Write protection status */ 1217 default: 1218 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1219 ASC_INV_FIELD_IN_CMD_PACKET); 1220 break; 1221 } 1222 } 1223 1224 static void cmd_set_speed(IDEState *s, uint8_t* buf) 1225 { 1226 ide_atapi_cmd_ok(s); 1227 } 1228 1229 enum { 1230 /* 1231 * Only commands flagged as ALLOW_UA are allowed to run under a 1232 * unit attention condition. (See MMC-5, section 4.1.6.1) 1233 */ 1234 ALLOW_UA = 0x01, 1235 1236 /* 1237 * Commands flagged with CHECK_READY can only execute if a medium is present. 1238 * Otherwise they report the Not Ready Condition. (See MMC-5, section 1239 * 4.1.8) 1240 */ 1241 CHECK_READY = 0x02, 1242 1243 /* 1244 * Commands flagged with NONDATA do not in any circumstances return 1245 * any data via ide_atapi_cmd_reply. These commands are exempt from 1246 * the normal byte_count_limit constraints. 1247 * See ATA8-ACS3 "7.21.5 Byte Count Limit" 1248 */ 1249 NONDATA = 0x04, 1250 1251 /* 1252 * CONDDATA implies a command that transfers data only conditionally based 1253 * on the presence of suboptions. It should be exempt from the BCL check at 1254 * command validation time, but it needs to be checked at the command 1255 * handler level instead. 1256 */ 1257 CONDDATA = 0x08, 1258 }; 1259 1260 static const struct AtapiCmd { 1261 void (*handler)(IDEState *s, uint8_t *buf); 1262 int flags; 1263 } atapi_cmd_table[0x100] = { 1264 [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY | NONDATA }, 1265 [ 0x03 ] = { cmd_request_sense, ALLOW_UA }, 1266 [ 0x12 ] = { cmd_inquiry, ALLOW_UA }, 1267 [ 0x1b ] = { cmd_start_stop_unit, NONDATA }, /* [1] */ 1268 [ 0x1e ] = { cmd_prevent_allow_medium_removal, NONDATA }, 1269 [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY }, 1270 [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY }, 1271 [ 0x2b ] = { cmd_seek, CHECK_READY | NONDATA }, 1272 [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY }, 1273 [ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, 1274 [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, 1275 [ 0x51 ] = { cmd_read_disc_information, CHECK_READY }, 1276 [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, 1277 [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY }, 1278 [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY }, 1279 [ 0xbb ] = { cmd_set_speed, NONDATA }, 1280 [ 0xbd ] = { cmd_mechanism_status, 0 }, 1281 [ 0xbe ] = { cmd_read_cd, CHECK_READY | CONDDATA }, 1282 /* [1] handler detects and reports not ready condition itself */ 1283 }; 1284 1285 void ide_atapi_cmd(IDEState *s) 1286 { 1287 uint8_t *buf = s->io_buffer; 1288 const struct AtapiCmd *cmd = &atapi_cmd_table[s->io_buffer[0]]; 1289 1290 trace_ide_atapi_cmd(s, s->io_buffer[0]); 1291 1292 if (trace_event_get_state_backends(TRACE_IDE_ATAPI_CMD_PACKET)) { 1293 /* Each pretty-printed byte needs two bytes and a space; */ 1294 char *ppacket = g_malloc(ATAPI_PACKET_SIZE * 3 + 1); 1295 int i; 1296 for (i = 0; i < ATAPI_PACKET_SIZE; i++) { 1297 sprintf(ppacket + (i * 3), "%02x ", buf[i]); 1298 } 1299 trace_ide_atapi_cmd_packet(s, s->lcyl | (s->hcyl << 8), ppacket); 1300 g_free(ppacket); 1301 } 1302 1303 /* 1304 * If there's a UNIT_ATTENTION condition pending, only command flagged with 1305 * ALLOW_UA are allowed to complete. with other commands getting a CHECK 1306 * condition response unless a higher priority status, defined by the drive 1307 * here, is pending. 1308 */ 1309 if (s->sense_key == UNIT_ATTENTION && !(cmd->flags & ALLOW_UA)) { 1310 ide_atapi_cmd_check_status(s); 1311 return; 1312 } 1313 /* 1314 * When a CD gets changed, we have to report an ejected state and 1315 * then a loaded state to guests so that they detect tray 1316 * open/close and media change events. Guests that do not use 1317 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close 1318 * states rely on this behavior. 1319 */ 1320 if (!(cmd->flags & ALLOW_UA) && 1321 !s->tray_open && blk_is_inserted(s->blk) && s->cdrom_changed) { 1322 1323 if (s->cdrom_changed == 1) { 1324 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1325 s->cdrom_changed = 2; 1326 } else { 1327 ide_atapi_cmd_error(s, UNIT_ATTENTION, ASC_MEDIUM_MAY_HAVE_CHANGED); 1328 s->cdrom_changed = 0; 1329 } 1330 1331 return; 1332 } 1333 1334 /* Report a Not Ready condition if appropriate for the command */ 1335 if ((cmd->flags & CHECK_READY) && 1336 (!media_present(s) || !blk_is_inserted(s->blk))) 1337 { 1338 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1339 return; 1340 } 1341 1342 /* Commands that don't transfer DATA permit the byte_count_limit to be 0. 1343 * If this is a data-transferring PIO command and BCL is 0, 1344 * we abort at the /ATA/ level, not the ATAPI level. 1345 * See ATA8 ACS3 section 7.17.6.49 and 7.21.5 */ 1346 if (cmd->handler && !(cmd->flags & (NONDATA | CONDDATA))) { 1347 if (!validate_bcl(s)) { 1348 return; 1349 } 1350 } 1351 1352 /* Execute the command */ 1353 if (cmd->handler) { 1354 cmd->handler(s, buf); 1355 return; 1356 } 1357 1358 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE); 1359 } 1360