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 31 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret); 32 33 static void padstr8(uint8_t *buf, int buf_size, const char *src) 34 { 35 int i; 36 for(i = 0; i < buf_size; i++) { 37 if (*src) 38 buf[i] = *src++; 39 else 40 buf[i] = ' '; 41 } 42 } 43 44 static inline void cpu_to_ube16(uint8_t *buf, int val) 45 { 46 buf[0] = val >> 8; 47 buf[1] = val & 0xff; 48 } 49 50 static inline void cpu_to_ube32(uint8_t *buf, unsigned int val) 51 { 52 buf[0] = val >> 24; 53 buf[1] = val >> 16; 54 buf[2] = val >> 8; 55 buf[3] = val & 0xff; 56 } 57 58 static inline int ube16_to_cpu(const uint8_t *buf) 59 { 60 return (buf[0] << 8) | buf[1]; 61 } 62 63 static inline int ube32_to_cpu(const uint8_t *buf) 64 { 65 return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; 66 } 67 68 static void lba_to_msf(uint8_t *buf, int lba) 69 { 70 lba += 150; 71 buf[0] = (lba / 75) / 60; 72 buf[1] = (lba / 75) % 60; 73 buf[2] = lba % 75; 74 } 75 76 static inline int media_present(IDEState *s) 77 { 78 return !s->tray_open && s->nb_sectors > 0; 79 } 80 81 /* XXX: DVDs that could fit on a CD will be reported as a CD */ 82 static inline int media_is_dvd(IDEState *s) 83 { 84 return (media_present(s) && s->nb_sectors > CD_MAX_SECTORS); 85 } 86 87 static inline int media_is_cd(IDEState *s) 88 { 89 return (media_present(s) && s->nb_sectors <= CD_MAX_SECTORS); 90 } 91 92 static void cd_data_to_raw(uint8_t *buf, int lba) 93 { 94 /* sync bytes */ 95 buf[0] = 0x00; 96 memset(buf + 1, 0xff, 10); 97 buf[11] = 0x00; 98 buf += 12; 99 /* MSF */ 100 lba_to_msf(buf, lba); 101 buf[3] = 0x01; /* mode 1 data */ 102 buf += 4; 103 /* data */ 104 buf += 2048; 105 /* XXX: ECC not computed */ 106 memset(buf, 0, 288); 107 } 108 109 static int 110 cd_read_sector_sync(IDEState *s) 111 { 112 int ret; 113 block_acct_start(blk_get_stats(s->blk), &s->acct, 114 4 * BDRV_SECTOR_SIZE, BLOCK_ACCT_READ); 115 116 #ifdef DEBUG_IDE_ATAPI 117 printf("cd_read_sector_sync: lba=%d\n", s->lba); 118 #endif 119 120 switch (s->cd_sector_size) { 121 case 2048: 122 ret = blk_read(s->blk, (int64_t)s->lba << 2, 123 s->io_buffer, 4); 124 break; 125 case 2352: 126 ret = blk_read(s->blk, (int64_t)s->lba << 2, 127 s->io_buffer + 16, 4); 128 if (ret >= 0) { 129 cd_data_to_raw(s->io_buffer, s->lba); 130 } 131 break; 132 default: 133 block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ); 134 return -EIO; 135 } 136 137 if (ret < 0) { 138 block_acct_failed(blk_get_stats(s->blk), &s->acct); 139 } else { 140 block_acct_done(blk_get_stats(s->blk), &s->acct); 141 s->lba++; 142 s->io_buffer_index = 0; 143 } 144 145 return ret; 146 } 147 148 static void cd_read_sector_cb(void *opaque, int ret) 149 { 150 IDEState *s = opaque; 151 152 #ifdef DEBUG_IDE_ATAPI 153 printf("cd_read_sector_cb: lba=%d ret=%d\n", s->lba, ret); 154 #endif 155 156 if (ret < 0) { 157 block_acct_failed(blk_get_stats(s->blk), &s->acct); 158 ide_atapi_io_error(s, ret); 159 return; 160 } 161 162 block_acct_done(blk_get_stats(s->blk), &s->acct); 163 164 if (s->cd_sector_size == 2352) { 165 cd_data_to_raw(s->io_buffer, s->lba); 166 } 167 168 s->lba++; 169 s->io_buffer_index = 0; 170 s->status &= ~BUSY_STAT; 171 172 ide_atapi_cmd_reply_end(s); 173 } 174 175 static int cd_read_sector(IDEState *s) 176 { 177 if (s->cd_sector_size != 2048 && s->cd_sector_size != 2352) { 178 block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ); 179 return -EINVAL; 180 } 181 182 s->iov.iov_base = (s->cd_sector_size == 2352) ? 183 s->io_buffer + 16 : s->io_buffer; 184 185 s->iov.iov_len = 4 * BDRV_SECTOR_SIZE; 186 qemu_iovec_init_external(&s->qiov, &s->iov, 1); 187 188 #ifdef DEBUG_IDE_ATAPI 189 printf("cd_read_sector: lba=%d\n", s->lba); 190 #endif 191 192 block_acct_start(blk_get_stats(s->blk), &s->acct, 193 4 * BDRV_SECTOR_SIZE, BLOCK_ACCT_READ); 194 195 ide_buffered_readv(s, (int64_t)s->lba << 2, &s->qiov, 4, 196 cd_read_sector_cb, s); 197 198 s->status |= BUSY_STAT; 199 return 0; 200 } 201 202 void ide_atapi_cmd_ok(IDEState *s) 203 { 204 s->error = 0; 205 s->status = READY_STAT | SEEK_STAT; 206 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 207 ide_transfer_stop(s); 208 ide_set_irq(s->bus); 209 } 210 211 void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc) 212 { 213 #ifdef DEBUG_IDE_ATAPI 214 printf("atapi_cmd_error: sense=0x%x asc=0x%x\n", sense_key, asc); 215 #endif 216 s->error = sense_key << 4; 217 s->status = READY_STAT | ERR_STAT; 218 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 219 s->sense_key = sense_key; 220 s->asc = asc; 221 ide_transfer_stop(s); 222 ide_set_irq(s->bus); 223 } 224 225 void ide_atapi_io_error(IDEState *s, int ret) 226 { 227 /* XXX: handle more errors */ 228 if (ret == -ENOMEDIUM) { 229 ide_atapi_cmd_error(s, NOT_READY, 230 ASC_MEDIUM_NOT_PRESENT); 231 } else { 232 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 233 ASC_LOGICAL_BLOCK_OOR); 234 } 235 } 236 237 static uint16_t atapi_byte_count_limit(IDEState *s) 238 { 239 uint16_t bcl; 240 241 bcl = s->lcyl | (s->hcyl << 8); 242 if (bcl == 0xffff) { 243 return 0xfffe; 244 } 245 return bcl; 246 } 247 248 /* The whole ATAPI transfer logic is handled in this function */ 249 void ide_atapi_cmd_reply_end(IDEState *s) 250 { 251 int byte_count_limit, size, ret; 252 #ifdef DEBUG_IDE_ATAPI 253 printf("reply: tx_size=%d elem_tx_size=%d index=%d\n", 254 s->packet_transfer_size, 255 s->elementary_transfer_size, 256 s->io_buffer_index); 257 #endif 258 if (s->packet_transfer_size <= 0) { 259 /* end of transfer */ 260 ide_atapi_cmd_ok(s); 261 ide_set_irq(s->bus); 262 #ifdef DEBUG_IDE_ATAPI 263 printf("end of transfer, status=0x%x\n", s->status); 264 #endif 265 } else { 266 /* see if a new sector must be read */ 267 if (s->lba != -1 && s->io_buffer_index >= s->cd_sector_size) { 268 if (!s->elementary_transfer_size) { 269 ret = cd_read_sector(s); 270 if (ret < 0) { 271 ide_atapi_io_error(s, ret); 272 } 273 return; 274 } else { 275 /* rebuffering within an elementary transfer is 276 * only possible with a sync request because we 277 * end up with a race condition otherwise */ 278 ret = cd_read_sector_sync(s); 279 if (ret < 0) { 280 ide_atapi_io_error(s, ret); 281 return; 282 } 283 } 284 } 285 if (s->elementary_transfer_size > 0) { 286 /* there are some data left to transmit in this elementary 287 transfer */ 288 size = s->cd_sector_size - s->io_buffer_index; 289 if (size > s->elementary_transfer_size) 290 size = s->elementary_transfer_size; 291 s->packet_transfer_size -= size; 292 s->elementary_transfer_size -= size; 293 s->io_buffer_index += size; 294 ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, 295 size, ide_atapi_cmd_reply_end); 296 } else { 297 /* a new transfer is needed */ 298 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO; 299 byte_count_limit = atapi_byte_count_limit(s); 300 #ifdef DEBUG_IDE_ATAPI 301 printf("byte_count_limit=%d\n", byte_count_limit); 302 #endif 303 size = s->packet_transfer_size; 304 if (size > byte_count_limit) { 305 /* byte count limit must be even if this case */ 306 if (byte_count_limit & 1) 307 byte_count_limit--; 308 size = byte_count_limit; 309 } 310 s->lcyl = size; 311 s->hcyl = size >> 8; 312 s->elementary_transfer_size = size; 313 /* we cannot transmit more than one sector at a time */ 314 if (s->lba != -1) { 315 if (size > (s->cd_sector_size - s->io_buffer_index)) 316 size = (s->cd_sector_size - s->io_buffer_index); 317 } 318 s->packet_transfer_size -= size; 319 s->elementary_transfer_size -= size; 320 s->io_buffer_index += size; 321 ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, 322 size, ide_atapi_cmd_reply_end); 323 ide_set_irq(s->bus); 324 #ifdef DEBUG_IDE_ATAPI 325 printf("status=0x%x\n", s->status); 326 #endif 327 } 328 } 329 } 330 331 /* send a reply of 'size' bytes in s->io_buffer to an ATAPI command */ 332 static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size) 333 { 334 if (size > max_size) 335 size = max_size; 336 s->lba = -1; /* no sector read */ 337 s->packet_transfer_size = size; 338 s->io_buffer_size = size; /* dma: send the reply data as one chunk */ 339 s->elementary_transfer_size = 0; 340 341 if (s->atapi_dma) { 342 block_acct_start(blk_get_stats(s->blk), &s->acct, size, 343 BLOCK_ACCT_READ); 344 s->status = READY_STAT | SEEK_STAT | DRQ_STAT; 345 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 346 } else { 347 s->status = READY_STAT | SEEK_STAT; 348 s->io_buffer_index = 0; 349 ide_atapi_cmd_reply_end(s); 350 } 351 } 352 353 /* start a CD-CDROM read command */ 354 static void ide_atapi_cmd_read_pio(IDEState *s, int lba, int nb_sectors, 355 int sector_size) 356 { 357 s->lba = lba; 358 s->packet_transfer_size = nb_sectors * sector_size; 359 s->elementary_transfer_size = 0; 360 s->io_buffer_index = sector_size; 361 s->cd_sector_size = sector_size; 362 363 ide_atapi_cmd_reply_end(s); 364 } 365 366 static void ide_atapi_cmd_check_status(IDEState *s) 367 { 368 #ifdef DEBUG_IDE_ATAPI 369 printf("atapi_cmd_check_status\n"); 370 #endif 371 s->error = MC_ERR | (UNIT_ATTENTION << 4); 372 s->status = ERR_STAT; 373 s->nsector = 0; 374 ide_set_irq(s->bus); 375 } 376 /* ATAPI DMA support */ 377 378 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret) 379 { 380 IDEState *s = opaque; 381 int data_offset, n; 382 383 if (ret < 0) { 384 if (ide_handle_rw_error(s, -ret, ide_dma_cmd_to_retry(s->dma_cmd))) { 385 if (s->bus->error_status) { 386 return; 387 } 388 goto eot; 389 } 390 } 391 392 if (s->io_buffer_size > 0) { 393 /* 394 * For a cdrom read sector command (s->lba != -1), 395 * adjust the lba for the next s->io_buffer_size chunk 396 * and dma the current chunk. 397 * For a command != read (s->lba == -1), just transfer 398 * the reply data. 399 */ 400 if (s->lba != -1) { 401 if (s->cd_sector_size == 2352) { 402 n = 1; 403 cd_data_to_raw(s->io_buffer, s->lba); 404 } else { 405 n = s->io_buffer_size >> 11; 406 } 407 s->lba += n; 408 } 409 s->packet_transfer_size -= s->io_buffer_size; 410 if (s->bus->dma->ops->rw_buf(s->bus->dma, 1) == 0) 411 goto eot; 412 } 413 414 if (s->packet_transfer_size <= 0) { 415 s->status = READY_STAT | SEEK_STAT; 416 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 417 ide_set_irq(s->bus); 418 goto eot; 419 } 420 421 s->io_buffer_index = 0; 422 if (s->cd_sector_size == 2352) { 423 n = 1; 424 s->io_buffer_size = s->cd_sector_size; 425 data_offset = 16; 426 } else { 427 n = s->packet_transfer_size >> 11; 428 if (n > (IDE_DMA_BUF_SECTORS / 4)) 429 n = (IDE_DMA_BUF_SECTORS / 4); 430 s->io_buffer_size = n * 2048; 431 data_offset = 0; 432 } 433 #ifdef DEBUG_AIO 434 printf("aio_read_cd: lba=%u n=%d\n", s->lba, n); 435 #endif 436 437 s->bus->dma->iov.iov_base = (void *)(s->io_buffer + data_offset); 438 s->bus->dma->iov.iov_len = n * 4 * 512; 439 qemu_iovec_init_external(&s->bus->dma->qiov, &s->bus->dma->iov, 1); 440 441 s->bus->dma->aiocb = ide_buffered_readv(s, (int64_t)s->lba << 2, 442 &s->bus->dma->qiov, n * 4, 443 ide_atapi_cmd_read_dma_cb, s); 444 return; 445 446 eot: 447 if (ret < 0) { 448 block_acct_failed(blk_get_stats(s->blk), &s->acct); 449 } else { 450 block_acct_done(blk_get_stats(s->blk), &s->acct); 451 } 452 ide_set_inactive(s, false); 453 } 454 455 /* start a CD-CDROM read command with DMA */ 456 /* XXX: test if DMA is available */ 457 static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors, 458 int sector_size) 459 { 460 s->lba = lba; 461 s->packet_transfer_size = nb_sectors * sector_size; 462 s->io_buffer_size = 0; 463 s->cd_sector_size = sector_size; 464 465 block_acct_start(blk_get_stats(s->blk), &s->acct, s->packet_transfer_size, 466 BLOCK_ACCT_READ); 467 468 /* XXX: check if BUSY_STAT should be set */ 469 s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT; 470 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 471 } 472 473 static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors, 474 int sector_size) 475 { 476 #ifdef DEBUG_IDE_ATAPI 477 printf("read %s: LBA=%d nb_sectors=%d\n", s->atapi_dma ? "dma" : "pio", 478 lba, nb_sectors); 479 #endif 480 if (s->atapi_dma) { 481 ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size); 482 } else { 483 ide_atapi_cmd_read_pio(s, lba, nb_sectors, sector_size); 484 } 485 } 486 487 void ide_atapi_dma_restart(IDEState *s) 488 { 489 /* 490 * At this point we can just re-evaluate the packet command and start over. 491 * The presence of ->dma_cb callback in the pre_save ensures that the packet 492 * command has been completely sent and we can safely restart command. 493 */ 494 s->unit = s->bus->retry_unit; 495 s->bus->dma->ops->restart_dma(s->bus->dma); 496 ide_atapi_cmd(s); 497 } 498 499 static inline uint8_t ide_atapi_set_profile(uint8_t *buf, uint8_t *index, 500 uint16_t profile) 501 { 502 uint8_t *buf_profile = buf + 12; /* start of profiles */ 503 504 buf_profile += ((*index) * 4); /* start of indexed profile */ 505 cpu_to_ube16 (buf_profile, profile); 506 buf_profile[2] = ((buf_profile[0] == buf[6]) && (buf_profile[1] == buf[7])); 507 508 /* each profile adds 4 bytes to the response */ 509 (*index)++; 510 buf[11] += 4; /* Additional Length */ 511 512 return 4; 513 } 514 515 static int ide_dvd_read_structure(IDEState *s, int format, 516 const uint8_t *packet, uint8_t *buf) 517 { 518 switch (format) { 519 case 0x0: /* Physical format information */ 520 { 521 int layer = packet[6]; 522 uint64_t total_sectors; 523 524 if (layer != 0) 525 return -ASC_INV_FIELD_IN_CMD_PACKET; 526 527 total_sectors = s->nb_sectors >> 2; 528 if (total_sectors == 0) { 529 return -ASC_MEDIUM_NOT_PRESENT; 530 } 531 532 buf[4] = 1; /* DVD-ROM, part version 1 */ 533 buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ 534 buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ 535 buf[7] = 0; /* default densities */ 536 537 /* FIXME: 0x30000 per spec? */ 538 cpu_to_ube32(buf + 8, 0); /* start sector */ 539 cpu_to_ube32(buf + 12, total_sectors - 1); /* end sector */ 540 cpu_to_ube32(buf + 16, total_sectors - 1); /* l0 end sector */ 541 542 /* Size of buffer, not including 2 byte size field */ 543 stw_be_p(buf, 2048 + 2); 544 545 /* 2k data + 4 byte header */ 546 return (2048 + 4); 547 } 548 549 case 0x01: /* DVD copyright information */ 550 buf[4] = 0; /* no copyright data */ 551 buf[5] = 0; /* no region restrictions */ 552 553 /* Size of buffer, not including 2 byte size field */ 554 stw_be_p(buf, 4 + 2); 555 556 /* 4 byte header + 4 byte data */ 557 return (4 + 4); 558 559 case 0x03: /* BCA information - invalid field for no BCA info */ 560 return -ASC_INV_FIELD_IN_CMD_PACKET; 561 562 case 0x04: /* DVD disc manufacturing information */ 563 /* Size of buffer, not including 2 byte size field */ 564 stw_be_p(buf, 2048 + 2); 565 566 /* 2k data + 4 byte header */ 567 return (2048 + 4); 568 569 case 0xff: 570 /* 571 * This lists all the command capabilities above. Add new ones 572 * in order and update the length and buffer return values. 573 */ 574 575 buf[4] = 0x00; /* Physical format */ 576 buf[5] = 0x40; /* Not writable, is readable */ 577 stw_be_p(buf + 6, 2048 + 4); 578 579 buf[8] = 0x01; /* Copyright info */ 580 buf[9] = 0x40; /* Not writable, is readable */ 581 stw_be_p(buf + 10, 4 + 4); 582 583 buf[12] = 0x03; /* BCA info */ 584 buf[13] = 0x40; /* Not writable, is readable */ 585 stw_be_p(buf + 14, 188 + 4); 586 587 buf[16] = 0x04; /* Manufacturing info */ 588 buf[17] = 0x40; /* Not writable, is readable */ 589 stw_be_p(buf + 18, 2048 + 4); 590 591 /* Size of buffer, not including 2 byte size field */ 592 stw_be_p(buf, 16 + 2); 593 594 /* data written + 4 byte header */ 595 return (16 + 4); 596 597 default: /* TODO: formats beyond DVD-ROM requires */ 598 return -ASC_INV_FIELD_IN_CMD_PACKET; 599 } 600 } 601 602 static unsigned int event_status_media(IDEState *s, 603 uint8_t *buf) 604 { 605 uint8_t event_code, media_status; 606 607 media_status = 0; 608 if (s->tray_open) { 609 media_status = MS_TRAY_OPEN; 610 } else if (blk_is_inserted(s->blk)) { 611 media_status = MS_MEDIA_PRESENT; 612 } 613 614 /* Event notification descriptor */ 615 event_code = MEC_NO_CHANGE; 616 if (media_status != MS_TRAY_OPEN) { 617 if (s->events.new_media) { 618 event_code = MEC_NEW_MEDIA; 619 s->events.new_media = false; 620 } else if (s->events.eject_request) { 621 event_code = MEC_EJECT_REQUESTED; 622 s->events.eject_request = false; 623 } 624 } 625 626 buf[4] = event_code; 627 buf[5] = media_status; 628 629 /* These fields are reserved, just clear them. */ 630 buf[6] = 0; 631 buf[7] = 0; 632 633 return 8; /* We wrote to 4 extra bytes from the header */ 634 } 635 636 static void cmd_get_event_status_notification(IDEState *s, 637 uint8_t *buf) 638 { 639 const uint8_t *packet = buf; 640 641 struct { 642 uint8_t opcode; 643 uint8_t polled; /* lsb bit is polled; others are reserved */ 644 uint8_t reserved2[2]; 645 uint8_t class; 646 uint8_t reserved3[2]; 647 uint16_t len; 648 uint8_t control; 649 } QEMU_PACKED *gesn_cdb; 650 651 struct { 652 uint16_t len; 653 uint8_t notification_class; 654 uint8_t supported_events; 655 } QEMU_PACKED *gesn_event_header; 656 unsigned int max_len, used_len; 657 658 gesn_cdb = (void *)packet; 659 gesn_event_header = (void *)buf; 660 661 max_len = be16_to_cpu(gesn_cdb->len); 662 663 /* It is fine by the MMC spec to not support async mode operations */ 664 if (!(gesn_cdb->polled & 0x01)) { /* asynchronous mode */ 665 /* Only polling is supported, asynchronous mode is not. */ 666 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 667 ASC_INV_FIELD_IN_CMD_PACKET); 668 return; 669 } 670 671 /* polling mode operation */ 672 673 /* 674 * These are the supported events. 675 * 676 * We currently only support requests of the 'media' type. 677 * Notification class requests and supported event classes are bitmasks, 678 * but they are build from the same values as the "notification class" 679 * field. 680 */ 681 gesn_event_header->supported_events = 1 << GESN_MEDIA; 682 683 /* 684 * We use |= below to set the class field; other bits in this byte 685 * are reserved now but this is useful to do if we have to use the 686 * reserved fields later. 687 */ 688 gesn_event_header->notification_class = 0; 689 690 /* 691 * Responses to requests are to be based on request priority. The 692 * notification_class_request_type enum above specifies the 693 * priority: upper elements are higher prio than lower ones. 694 */ 695 if (gesn_cdb->class & (1 << GESN_MEDIA)) { 696 gesn_event_header->notification_class |= GESN_MEDIA; 697 used_len = event_status_media(s, buf); 698 } else { 699 gesn_event_header->notification_class = 0x80; /* No event available */ 700 used_len = sizeof(*gesn_event_header); 701 } 702 gesn_event_header->len = cpu_to_be16(used_len 703 - sizeof(*gesn_event_header)); 704 ide_atapi_cmd_reply(s, used_len, max_len); 705 } 706 707 static void cmd_request_sense(IDEState *s, uint8_t *buf) 708 { 709 int max_len = buf[4]; 710 711 memset(buf, 0, 18); 712 buf[0] = 0x70 | (1 << 7); 713 buf[2] = s->sense_key; 714 buf[7] = 10; 715 buf[12] = s->asc; 716 717 if (s->sense_key == UNIT_ATTENTION) { 718 s->sense_key = NO_SENSE; 719 } 720 721 ide_atapi_cmd_reply(s, 18, max_len); 722 } 723 724 static void cmd_inquiry(IDEState *s, uint8_t *buf) 725 { 726 uint8_t page_code = buf[2]; 727 int max_len = buf[4]; 728 729 unsigned idx = 0; 730 unsigned size_idx; 731 unsigned preamble_len; 732 733 /* If the EVPD (Enable Vital Product Data) bit is set in byte 1, 734 * we are being asked for a specific page of info indicated by byte 2. */ 735 if (buf[1] & 0x01) { 736 preamble_len = 4; 737 size_idx = 3; 738 739 buf[idx++] = 0x05; /* CD-ROM */ 740 buf[idx++] = page_code; /* Page Code */ 741 buf[idx++] = 0x00; /* reserved */ 742 idx++; /* length (set later) */ 743 744 switch (page_code) { 745 case 0x00: 746 /* Supported Pages: List of supported VPD responses. */ 747 buf[idx++] = 0x00; /* 0x00: Supported Pages, and: */ 748 buf[idx++] = 0x83; /* 0x83: Device Identification. */ 749 break; 750 751 case 0x83: 752 /* Device Identification. Each entry is optional, but the entries 753 * included here are modeled after libata's VPD responses. 754 * If the response is given, at least one entry must be present. */ 755 756 /* Entry 1: Serial */ 757 if (idx + 24 > max_len) { 758 /* Not enough room for even the first entry: */ 759 /* 4 byte header + 20 byte string */ 760 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 761 ASC_DATA_PHASE_ERROR); 762 return; 763 } 764 buf[idx++] = 0x02; /* Ascii */ 765 buf[idx++] = 0x00; /* Vendor Specific */ 766 buf[idx++] = 0x00; 767 buf[idx++] = 20; /* Remaining length */ 768 padstr8(buf + idx, 20, s->drive_serial_str); 769 idx += 20; 770 771 /* Entry 2: Drive Model and Serial */ 772 if (idx + 72 > max_len) { 773 /* 4 (header) + 8 (vendor) + 60 (model & serial) */ 774 goto out; 775 } 776 buf[idx++] = 0x02; /* Ascii */ 777 buf[idx++] = 0x01; /* T10 Vendor */ 778 buf[idx++] = 0x00; 779 buf[idx++] = 68; 780 padstr8(buf + idx, 8, "ATA"); /* Generic T10 vendor */ 781 idx += 8; 782 padstr8(buf + idx, 40, s->drive_model_str); 783 idx += 40; 784 padstr8(buf + idx, 20, s->drive_serial_str); 785 idx += 20; 786 787 /* Entry 3: WWN */ 788 if (s->wwn && (idx + 12 <= max_len)) { 789 /* 4 byte header + 8 byte wwn */ 790 buf[idx++] = 0x01; /* Binary */ 791 buf[idx++] = 0x03; /* NAA */ 792 buf[idx++] = 0x00; 793 buf[idx++] = 0x08; 794 stq_be_p(&buf[idx], s->wwn); 795 idx += 8; 796 } 797 break; 798 799 default: 800 /* SPC-3, revision 23 sec. 6.4 */ 801 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 802 ASC_INV_FIELD_IN_CMD_PACKET); 803 return; 804 } 805 } else { 806 preamble_len = 5; 807 size_idx = 4; 808 809 buf[0] = 0x05; /* CD-ROM */ 810 buf[1] = 0x80; /* removable */ 811 buf[2] = 0x00; /* ISO */ 812 buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */ 813 /* buf[size_idx] set below. */ 814 buf[5] = 0; /* reserved */ 815 buf[6] = 0; /* reserved */ 816 buf[7] = 0; /* reserved */ 817 padstr8(buf + 8, 8, "QEMU"); 818 padstr8(buf + 16, 16, "QEMU DVD-ROM"); 819 padstr8(buf + 32, 4, s->version); 820 idx = 36; 821 } 822 823 out: 824 buf[size_idx] = idx - preamble_len; 825 ide_atapi_cmd_reply(s, idx, max_len); 826 } 827 828 static void cmd_get_configuration(IDEState *s, uint8_t *buf) 829 { 830 uint32_t len; 831 uint8_t index = 0; 832 int max_len; 833 834 /* only feature 0 is supported */ 835 if (buf[2] != 0 || buf[3] != 0) { 836 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 837 ASC_INV_FIELD_IN_CMD_PACKET); 838 return; 839 } 840 841 /* XXX: could result in alignment problems in some architectures */ 842 max_len = ube16_to_cpu(buf + 7); 843 844 /* 845 * XXX: avoid overflow for io_buffer if max_len is bigger than 846 * the size of that buffer (dimensioned to max number of 847 * sectors to transfer at once) 848 * 849 * Only a problem if the feature/profiles grow. 850 */ 851 if (max_len > 512) { 852 /* XXX: assume 1 sector */ 853 max_len = 512; 854 } 855 856 memset(buf, 0, max_len); 857 /* 858 * the number of sectors from the media tells us which profile 859 * to use as current. 0 means there is no media 860 */ 861 if (media_is_dvd(s)) { 862 cpu_to_ube16(buf + 6, MMC_PROFILE_DVD_ROM); 863 } else if (media_is_cd(s)) { 864 cpu_to_ube16(buf + 6, MMC_PROFILE_CD_ROM); 865 } 866 867 buf[10] = 0x02 | 0x01; /* persistent and current */ 868 len = 12; /* headers: 8 + 4 */ 869 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_DVD_ROM); 870 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_CD_ROM); 871 cpu_to_ube32(buf, len - 4); /* data length */ 872 873 ide_atapi_cmd_reply(s, len, max_len); 874 } 875 876 static void cmd_mode_sense(IDEState *s, uint8_t *buf) 877 { 878 int action, code; 879 int max_len; 880 881 max_len = ube16_to_cpu(buf + 7); 882 action = buf[2] >> 6; 883 code = buf[2] & 0x3f; 884 885 switch(action) { 886 case 0: /* current values */ 887 switch(code) { 888 case MODE_PAGE_R_W_ERROR: /* error recovery */ 889 cpu_to_ube16(&buf[0], 16 - 2); 890 buf[2] = 0x70; 891 buf[3] = 0; 892 buf[4] = 0; 893 buf[5] = 0; 894 buf[6] = 0; 895 buf[7] = 0; 896 897 buf[8] = MODE_PAGE_R_W_ERROR; 898 buf[9] = 16 - 10; 899 buf[10] = 0x00; 900 buf[11] = 0x05; 901 buf[12] = 0x00; 902 buf[13] = 0x00; 903 buf[14] = 0x00; 904 buf[15] = 0x00; 905 ide_atapi_cmd_reply(s, 16, max_len); 906 break; 907 case MODE_PAGE_AUDIO_CTL: 908 cpu_to_ube16(&buf[0], 24 - 2); 909 buf[2] = 0x70; 910 buf[3] = 0; 911 buf[4] = 0; 912 buf[5] = 0; 913 buf[6] = 0; 914 buf[7] = 0; 915 916 buf[8] = MODE_PAGE_AUDIO_CTL; 917 buf[9] = 24 - 10; 918 /* Fill with CDROM audio volume */ 919 buf[17] = 0; 920 buf[19] = 0; 921 buf[21] = 0; 922 buf[23] = 0; 923 924 ide_atapi_cmd_reply(s, 24, max_len); 925 break; 926 case MODE_PAGE_CAPABILITIES: 927 cpu_to_ube16(&buf[0], 30 - 2); 928 buf[2] = 0x70; 929 buf[3] = 0; 930 buf[4] = 0; 931 buf[5] = 0; 932 buf[6] = 0; 933 buf[7] = 0; 934 935 buf[8] = MODE_PAGE_CAPABILITIES; 936 buf[9] = 30 - 10; 937 buf[10] = 0x3b; /* read CDR/CDRW/DVDROM/DVDR/DVDRAM */ 938 buf[11] = 0x00; 939 940 /* Claim PLAY_AUDIO capability (0x01) since some Linux 941 code checks for this to automount media. */ 942 buf[12] = 0x71; 943 buf[13] = 3 << 5; 944 buf[14] = (1 << 0) | (1 << 3) | (1 << 5); 945 if (s->tray_locked) { 946 buf[14] |= 1 << 1; 947 } 948 buf[15] = 0x00; /* No volume & mute control, no changer */ 949 cpu_to_ube16(&buf[16], 704); /* 4x read speed */ 950 buf[18] = 0; /* Two volume levels */ 951 buf[19] = 2; 952 cpu_to_ube16(&buf[20], 512); /* 512k buffer */ 953 cpu_to_ube16(&buf[22], 704); /* 4x read speed current */ 954 buf[24] = 0; 955 buf[25] = 0; 956 buf[26] = 0; 957 buf[27] = 0; 958 buf[28] = 0; 959 buf[29] = 0; 960 ide_atapi_cmd_reply(s, 30, max_len); 961 break; 962 default: 963 goto error_cmd; 964 } 965 break; 966 case 1: /* changeable values */ 967 goto error_cmd; 968 case 2: /* default values */ 969 goto error_cmd; 970 default: 971 case 3: /* saved values */ 972 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 973 ASC_SAVING_PARAMETERS_NOT_SUPPORTED); 974 break; 975 } 976 return; 977 978 error_cmd: 979 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET); 980 } 981 982 static void cmd_test_unit_ready(IDEState *s, uint8_t *buf) 983 { 984 /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we 985 * come here, we know that it's ready. */ 986 ide_atapi_cmd_ok(s); 987 } 988 989 static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf) 990 { 991 s->tray_locked = buf[4] & 1; 992 blk_lock_medium(s->blk, buf[4] & 1); 993 ide_atapi_cmd_ok(s); 994 } 995 996 static void cmd_read(IDEState *s, uint8_t* buf) 997 { 998 int nb_sectors, lba; 999 1000 if (buf[0] == GPCMD_READ_10) { 1001 nb_sectors = ube16_to_cpu(buf + 7); 1002 } else { 1003 nb_sectors = ube32_to_cpu(buf + 6); 1004 } 1005 1006 lba = ube32_to_cpu(buf + 2); 1007 if (nb_sectors == 0) { 1008 ide_atapi_cmd_ok(s); 1009 return; 1010 } 1011 1012 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 1013 } 1014 1015 static void cmd_read_cd(IDEState *s, uint8_t* buf) 1016 { 1017 int nb_sectors, lba, transfer_request; 1018 1019 nb_sectors = (buf[6] << 16) | (buf[7] << 8) | buf[8]; 1020 lba = ube32_to_cpu(buf + 2); 1021 1022 if (nb_sectors == 0) { 1023 ide_atapi_cmd_ok(s); 1024 return; 1025 } 1026 1027 transfer_request = buf[9]; 1028 switch(transfer_request & 0xf8) { 1029 case 0x00: 1030 /* nothing */ 1031 ide_atapi_cmd_ok(s); 1032 break; 1033 case 0x10: 1034 /* normal read */ 1035 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 1036 break; 1037 case 0xf8: 1038 /* read all data */ 1039 ide_atapi_cmd_read(s, lba, nb_sectors, 2352); 1040 break; 1041 default: 1042 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1043 ASC_INV_FIELD_IN_CMD_PACKET); 1044 break; 1045 } 1046 } 1047 1048 static void cmd_seek(IDEState *s, uint8_t* buf) 1049 { 1050 unsigned int lba; 1051 uint64_t total_sectors = s->nb_sectors >> 2; 1052 1053 lba = ube32_to_cpu(buf + 2); 1054 if (lba >= total_sectors) { 1055 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR); 1056 return; 1057 } 1058 1059 ide_atapi_cmd_ok(s); 1060 } 1061 1062 static void cmd_start_stop_unit(IDEState *s, uint8_t* buf) 1063 { 1064 int sense; 1065 bool start = buf[4] & 1; 1066 bool loej = buf[4] & 2; /* load on start, eject on !start */ 1067 int pwrcnd = buf[4] & 0xf0; 1068 1069 if (pwrcnd) { 1070 /* eject/load only happens for power condition == 0 */ 1071 ide_atapi_cmd_ok(s); 1072 return; 1073 } 1074 1075 if (loej) { 1076 if (!start && !s->tray_open && s->tray_locked) { 1077 sense = blk_is_inserted(s->blk) 1078 ? NOT_READY : ILLEGAL_REQUEST; 1079 ide_atapi_cmd_error(s, sense, ASC_MEDIA_REMOVAL_PREVENTED); 1080 return; 1081 } 1082 1083 if (s->tray_open != !start) { 1084 blk_eject(s->blk, !start); 1085 s->tray_open = !start; 1086 } 1087 } 1088 1089 ide_atapi_cmd_ok(s); 1090 } 1091 1092 static void cmd_mechanism_status(IDEState *s, uint8_t* buf) 1093 { 1094 int max_len = ube16_to_cpu(buf + 8); 1095 1096 cpu_to_ube16(buf, 0); 1097 /* no current LBA */ 1098 buf[2] = 0; 1099 buf[3] = 0; 1100 buf[4] = 0; 1101 buf[5] = 1; 1102 cpu_to_ube16(buf + 6, 0); 1103 ide_atapi_cmd_reply(s, 8, max_len); 1104 } 1105 1106 static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf) 1107 { 1108 int format, msf, start_track, len; 1109 int max_len; 1110 uint64_t total_sectors = s->nb_sectors >> 2; 1111 1112 max_len = ube16_to_cpu(buf + 7); 1113 format = buf[9] >> 6; 1114 msf = (buf[1] >> 1) & 1; 1115 start_track = buf[6]; 1116 1117 switch(format) { 1118 case 0: 1119 len = cdrom_read_toc(total_sectors, buf, msf, start_track); 1120 if (len < 0) 1121 goto error_cmd; 1122 ide_atapi_cmd_reply(s, len, max_len); 1123 break; 1124 case 1: 1125 /* multi session : only a single session defined */ 1126 memset(buf, 0, 12); 1127 buf[1] = 0x0a; 1128 buf[2] = 0x01; 1129 buf[3] = 0x01; 1130 ide_atapi_cmd_reply(s, 12, max_len); 1131 break; 1132 case 2: 1133 len = cdrom_read_toc_raw(total_sectors, buf, msf, start_track); 1134 if (len < 0) 1135 goto error_cmd; 1136 ide_atapi_cmd_reply(s, len, max_len); 1137 break; 1138 default: 1139 error_cmd: 1140 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1141 ASC_INV_FIELD_IN_CMD_PACKET); 1142 } 1143 } 1144 1145 static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf) 1146 { 1147 uint64_t total_sectors = s->nb_sectors >> 2; 1148 1149 /* NOTE: it is really the number of sectors minus 1 */ 1150 cpu_to_ube32(buf, total_sectors - 1); 1151 cpu_to_ube32(buf + 4, 2048); 1152 ide_atapi_cmd_reply(s, 8, 8); 1153 } 1154 1155 static void cmd_read_disc_information(IDEState *s, uint8_t* buf) 1156 { 1157 uint8_t type = buf[1] & 7; 1158 uint32_t max_len = ube16_to_cpu(buf + 7); 1159 1160 /* Types 1/2 are only defined for Blu-Ray. */ 1161 if (type != 0) { 1162 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1163 ASC_INV_FIELD_IN_CMD_PACKET); 1164 return; 1165 } 1166 1167 memset(buf, 0, 34); 1168 buf[1] = 32; 1169 buf[2] = 0xe; /* last session complete, disc finalized */ 1170 buf[3] = 1; /* first track on disc */ 1171 buf[4] = 1; /* # of sessions */ 1172 buf[5] = 1; /* first track of last session */ 1173 buf[6] = 1; /* last track of last session */ 1174 buf[7] = 0x20; /* unrestricted use */ 1175 buf[8] = 0x00; /* CD-ROM or DVD-ROM */ 1176 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */ 1177 /* 12-23: not meaningful for CD-ROM or DVD-ROM */ 1178 /* 24-31: disc bar code */ 1179 /* 32: disc application code */ 1180 /* 33: number of OPC tables */ 1181 1182 ide_atapi_cmd_reply(s, 34, max_len); 1183 } 1184 1185 static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf) 1186 { 1187 int max_len; 1188 int media = buf[1]; 1189 int format = buf[7]; 1190 int ret; 1191 1192 max_len = ube16_to_cpu(buf + 8); 1193 1194 if (format < 0xff) { 1195 if (media_is_cd(s)) { 1196 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1197 ASC_INCOMPATIBLE_FORMAT); 1198 return; 1199 } else if (!media_present(s)) { 1200 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1201 ASC_INV_FIELD_IN_CMD_PACKET); 1202 return; 1203 } 1204 } 1205 1206 memset(buf, 0, max_len > IDE_DMA_BUF_SECTORS * 512 + 4 ? 1207 IDE_DMA_BUF_SECTORS * 512 + 4 : max_len); 1208 1209 switch (format) { 1210 case 0x00 ... 0x7f: 1211 case 0xff: 1212 if (media == 0) { 1213 ret = ide_dvd_read_structure(s, format, buf, buf); 1214 1215 if (ret < 0) { 1216 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, -ret); 1217 } else { 1218 ide_atapi_cmd_reply(s, ret, max_len); 1219 } 1220 1221 break; 1222 } 1223 /* TODO: BD support, fall through for now */ 1224 1225 /* Generic disk structures */ 1226 case 0x80: /* TODO: AACS volume identifier */ 1227 case 0x81: /* TODO: AACS media serial number */ 1228 case 0x82: /* TODO: AACS media identifier */ 1229 case 0x83: /* TODO: AACS media key block */ 1230 case 0x90: /* TODO: List of recognized format layers */ 1231 case 0xc0: /* TODO: Write protection status */ 1232 default: 1233 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1234 ASC_INV_FIELD_IN_CMD_PACKET); 1235 break; 1236 } 1237 } 1238 1239 static void cmd_set_speed(IDEState *s, uint8_t* buf) 1240 { 1241 ide_atapi_cmd_ok(s); 1242 } 1243 1244 enum { 1245 /* 1246 * Only commands flagged as ALLOW_UA are allowed to run under a 1247 * unit attention condition. (See MMC-5, section 4.1.6.1) 1248 */ 1249 ALLOW_UA = 0x01, 1250 1251 /* 1252 * Commands flagged with CHECK_READY can only execute if a medium is present. 1253 * Otherwise they report the Not Ready Condition. (See MMC-5, section 1254 * 4.1.8) 1255 */ 1256 CHECK_READY = 0x02, 1257 1258 /* 1259 * Commands flagged with NONDATA do not in any circumstances return 1260 * any data via ide_atapi_cmd_reply. These commands are exempt from 1261 * the normal byte_count_limit constraints. 1262 * See ATA8-ACS3 "7.21.5 Byte Count Limit" 1263 */ 1264 NONDATA = 0x04, 1265 }; 1266 1267 static const struct AtapiCmd { 1268 void (*handler)(IDEState *s, uint8_t *buf); 1269 int flags; 1270 } atapi_cmd_table[0x100] = { 1271 [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY | NONDATA }, 1272 [ 0x03 ] = { cmd_request_sense, ALLOW_UA }, 1273 [ 0x12 ] = { cmd_inquiry, ALLOW_UA }, 1274 [ 0x1b ] = { cmd_start_stop_unit, NONDATA }, /* [1] */ 1275 [ 0x1e ] = { cmd_prevent_allow_medium_removal, NONDATA }, 1276 [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY }, 1277 [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY }, 1278 [ 0x2b ] = { cmd_seek, CHECK_READY | NONDATA }, 1279 [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY }, 1280 [ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, 1281 [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, 1282 [ 0x51 ] = { cmd_read_disc_information, CHECK_READY }, 1283 [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, 1284 [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY }, 1285 [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY }, 1286 [ 0xbb ] = { cmd_set_speed, NONDATA }, 1287 [ 0xbd ] = { cmd_mechanism_status, 0 }, 1288 [ 0xbe ] = { cmd_read_cd, CHECK_READY }, 1289 /* [1] handler detects and reports not ready condition itself */ 1290 }; 1291 1292 void ide_atapi_cmd(IDEState *s) 1293 { 1294 uint8_t *buf = s->io_buffer; 1295 const struct AtapiCmd *cmd = &atapi_cmd_table[s->io_buffer[0]]; 1296 1297 #ifdef DEBUG_IDE_ATAPI 1298 { 1299 int i; 1300 printf("ATAPI limit=0x%x packet:", s->lcyl | (s->hcyl << 8)); 1301 for(i = 0; i < ATAPI_PACKET_SIZE; i++) { 1302 printf(" %02x", buf[i]); 1303 } 1304 printf("\n"); 1305 } 1306 #endif 1307 1308 /* 1309 * If there's a UNIT_ATTENTION condition pending, only command flagged with 1310 * ALLOW_UA are allowed to complete. with other commands getting a CHECK 1311 * condition response unless a higher priority status, defined by the drive 1312 * here, is pending. 1313 */ 1314 if (s->sense_key == UNIT_ATTENTION && !(cmd->flags & ALLOW_UA)) { 1315 ide_atapi_cmd_check_status(s); 1316 return; 1317 } 1318 /* 1319 * When a CD gets changed, we have to report an ejected state and 1320 * then a loaded state to guests so that they detect tray 1321 * open/close and media change events. Guests that do not use 1322 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close 1323 * states rely on this behavior. 1324 */ 1325 if (!(cmd->flags & ALLOW_UA) && 1326 !s->tray_open && blk_is_inserted(s->blk) && s->cdrom_changed) { 1327 1328 if (s->cdrom_changed == 1) { 1329 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1330 s->cdrom_changed = 2; 1331 } else { 1332 ide_atapi_cmd_error(s, UNIT_ATTENTION, ASC_MEDIUM_MAY_HAVE_CHANGED); 1333 s->cdrom_changed = 0; 1334 } 1335 1336 return; 1337 } 1338 1339 /* Report a Not Ready condition if appropriate for the command */ 1340 if ((cmd->flags & CHECK_READY) && 1341 (!media_present(s) || !blk_is_inserted(s->blk))) 1342 { 1343 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1344 return; 1345 } 1346 1347 /* Nondata commands permit the byte_count_limit to be 0. 1348 * If this is a data-transferring PIO command and BCL is 0, 1349 * we abort at the /ATA/ level, not the ATAPI level. 1350 * See ATA8 ACS3 section 7.17.6.49 and 7.21.5 */ 1351 if (cmd->handler && !(cmd->flags & NONDATA)) { 1352 /* TODO: Check IDENTIFY data word 125 for default BCL (currently 0) */ 1353 if (!(atapi_byte_count_limit(s) || s->atapi_dma)) { 1354 /* TODO: Move abort back into core.c and make static inline again */ 1355 ide_abort_command(s); 1356 return; 1357 } 1358 } 1359 1360 /* Execute the command */ 1361 if (cmd->handler) { 1362 cmd->handler(s, buf); 1363 return; 1364 } 1365 1366 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE); 1367 } 1368