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 #define ATAPI_SECTOR_BITS (2 + BDRV_SECTOR_BITS) 32 #define ATAPI_SECTOR_SIZE (1 << ATAPI_SECTOR_BITS) 33 34 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret); 35 36 static void padstr8(uint8_t *buf, int buf_size, const char *src) 37 { 38 int i; 39 for(i = 0; i < buf_size; i++) { 40 if (*src) 41 buf[i] = *src++; 42 else 43 buf[i] = ' '; 44 } 45 } 46 47 static inline void cpu_to_ube16(uint8_t *buf, int val) 48 { 49 buf[0] = val >> 8; 50 buf[1] = val & 0xff; 51 } 52 53 static inline void cpu_to_ube32(uint8_t *buf, unsigned int val) 54 { 55 buf[0] = val >> 24; 56 buf[1] = val >> 16; 57 buf[2] = val >> 8; 58 buf[3] = val & 0xff; 59 } 60 61 static inline int ube16_to_cpu(const uint8_t *buf) 62 { 63 return (buf[0] << 8) | buf[1]; 64 } 65 66 static inline int ube32_to_cpu(const uint8_t *buf) 67 { 68 return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; 69 } 70 71 static void lba_to_msf(uint8_t *buf, int lba) 72 { 73 lba += 150; 74 buf[0] = (lba / 75) / 60; 75 buf[1] = (lba / 75) % 60; 76 buf[2] = lba % 75; 77 } 78 79 static inline int media_present(IDEState *s) 80 { 81 return !s->tray_open && s->nb_sectors > 0; 82 } 83 84 /* XXX: DVDs that could fit on a CD will be reported as a CD */ 85 static inline int media_is_dvd(IDEState *s) 86 { 87 return (media_present(s) && s->nb_sectors > CD_MAX_SECTORS); 88 } 89 90 static inline int media_is_cd(IDEState *s) 91 { 92 return (media_present(s) && s->nb_sectors <= CD_MAX_SECTORS); 93 } 94 95 static void cd_data_to_raw(uint8_t *buf, int lba) 96 { 97 /* sync bytes */ 98 buf[0] = 0x00; 99 memset(buf + 1, 0xff, 10); 100 buf[11] = 0x00; 101 buf += 12; 102 /* MSF */ 103 lba_to_msf(buf, lba); 104 buf[3] = 0x01; /* mode 1 data */ 105 buf += 4; 106 /* data */ 107 buf += 2048; 108 /* XXX: ECC not computed */ 109 memset(buf, 0, 288); 110 } 111 112 static int 113 cd_read_sector_sync(IDEState *s) 114 { 115 int ret; 116 block_acct_start(blk_get_stats(s->blk), &s->acct, 117 ATAPI_SECTOR_SIZE, BLOCK_ACCT_READ); 118 119 #ifdef DEBUG_IDE_ATAPI 120 printf("cd_read_sector_sync: lba=%d\n", s->lba); 121 #endif 122 123 switch (s->cd_sector_size) { 124 case 2048: 125 ret = blk_pread(s->blk, (int64_t)s->lba << ATAPI_SECTOR_BITS, 126 s->io_buffer, ATAPI_SECTOR_SIZE); 127 break; 128 case 2352: 129 ret = blk_pread(s->blk, (int64_t)s->lba << ATAPI_SECTOR_BITS, 130 s->io_buffer + 16, ATAPI_SECTOR_SIZE); 131 if (ret >= 0) { 132 cd_data_to_raw(s->io_buffer, s->lba); 133 } 134 break; 135 default: 136 block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ); 137 return -EIO; 138 } 139 140 if (ret < 0) { 141 block_acct_failed(blk_get_stats(s->blk), &s->acct); 142 } else { 143 block_acct_done(blk_get_stats(s->blk), &s->acct); 144 s->lba++; 145 s->io_buffer_index = 0; 146 } 147 148 return ret; 149 } 150 151 static void cd_read_sector_cb(void *opaque, int ret) 152 { 153 IDEState *s = opaque; 154 155 #ifdef DEBUG_IDE_ATAPI 156 printf("cd_read_sector_cb: lba=%d ret=%d\n", s->lba, ret); 157 #endif 158 159 if (ret < 0) { 160 block_acct_failed(blk_get_stats(s->blk), &s->acct); 161 ide_atapi_io_error(s, ret); 162 return; 163 } 164 165 block_acct_done(blk_get_stats(s->blk), &s->acct); 166 167 if (s->cd_sector_size == 2352) { 168 cd_data_to_raw(s->io_buffer, s->lba); 169 } 170 171 s->lba++; 172 s->io_buffer_index = 0; 173 s->status &= ~BUSY_STAT; 174 175 ide_atapi_cmd_reply_end(s); 176 } 177 178 static int cd_read_sector(IDEState *s) 179 { 180 if (s->cd_sector_size != 2048 && s->cd_sector_size != 2352) { 181 block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ); 182 return -EINVAL; 183 } 184 185 s->iov.iov_base = (s->cd_sector_size == 2352) ? 186 s->io_buffer + 16 : s->io_buffer; 187 188 s->iov.iov_len = ATAPI_SECTOR_SIZE; 189 qemu_iovec_init_external(&s->qiov, &s->iov, 1); 190 191 #ifdef DEBUG_IDE_ATAPI 192 printf("cd_read_sector: lba=%d\n", s->lba); 193 #endif 194 195 block_acct_start(blk_get_stats(s->blk), &s->acct, 196 ATAPI_SECTOR_SIZE, BLOCK_ACCT_READ); 197 198 ide_buffered_readv(s, (int64_t)s->lba << 2, &s->qiov, 4, 199 cd_read_sector_cb, s); 200 201 s->status |= BUSY_STAT; 202 return 0; 203 } 204 205 void ide_atapi_cmd_ok(IDEState *s) 206 { 207 s->error = 0; 208 s->status = READY_STAT | SEEK_STAT; 209 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 210 ide_transfer_stop(s); 211 ide_set_irq(s->bus); 212 } 213 214 void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc) 215 { 216 #ifdef DEBUG_IDE_ATAPI 217 printf("atapi_cmd_error: sense=0x%x asc=0x%x\n", sense_key, asc); 218 #endif 219 s->error = sense_key << 4; 220 s->status = READY_STAT | ERR_STAT; 221 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 222 s->sense_key = sense_key; 223 s->asc = asc; 224 ide_transfer_stop(s); 225 ide_set_irq(s->bus); 226 } 227 228 void ide_atapi_io_error(IDEState *s, int ret) 229 { 230 /* XXX: handle more errors */ 231 if (ret == -ENOMEDIUM) { 232 ide_atapi_cmd_error(s, NOT_READY, 233 ASC_MEDIUM_NOT_PRESENT); 234 } else { 235 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 236 ASC_LOGICAL_BLOCK_OOR); 237 } 238 } 239 240 static uint16_t atapi_byte_count_limit(IDEState *s) 241 { 242 uint16_t bcl; 243 244 bcl = s->lcyl | (s->hcyl << 8); 245 if (bcl == 0xffff) { 246 return 0xfffe; 247 } 248 return bcl; 249 } 250 251 /* The whole ATAPI transfer logic is handled in this function */ 252 void ide_atapi_cmd_reply_end(IDEState *s) 253 { 254 int byte_count_limit, size, ret; 255 #ifdef DEBUG_IDE_ATAPI 256 printf("reply: tx_size=%d elem_tx_size=%d index=%d\n", 257 s->packet_transfer_size, 258 s->elementary_transfer_size, 259 s->io_buffer_index); 260 #endif 261 if (s->packet_transfer_size <= 0) { 262 /* end of transfer */ 263 ide_atapi_cmd_ok(s); 264 ide_set_irq(s->bus); 265 #ifdef DEBUG_IDE_ATAPI 266 printf("end of transfer, status=0x%x\n", s->status); 267 #endif 268 } else { 269 /* see if a new sector must be read */ 270 if (s->lba != -1 && s->io_buffer_index >= s->cd_sector_size) { 271 if (!s->elementary_transfer_size) { 272 ret = cd_read_sector(s); 273 if (ret < 0) { 274 ide_atapi_io_error(s, ret); 275 } 276 return; 277 } else { 278 /* rebuffering within an elementary transfer is 279 * only possible with a sync request because we 280 * end up with a race condition otherwise */ 281 ret = cd_read_sector_sync(s); 282 if (ret < 0) { 283 ide_atapi_io_error(s, ret); 284 return; 285 } 286 } 287 } 288 if (s->elementary_transfer_size > 0) { 289 /* there are some data left to transmit in this elementary 290 transfer */ 291 size = s->cd_sector_size - s->io_buffer_index; 292 if (size > s->elementary_transfer_size) 293 size = s->elementary_transfer_size; 294 s->packet_transfer_size -= size; 295 s->elementary_transfer_size -= size; 296 s->io_buffer_index += size; 297 ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, 298 size, ide_atapi_cmd_reply_end); 299 } else { 300 /* a new transfer is needed */ 301 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO; 302 byte_count_limit = atapi_byte_count_limit(s); 303 #ifdef DEBUG_IDE_ATAPI 304 printf("byte_count_limit=%d\n", byte_count_limit); 305 #endif 306 size = s->packet_transfer_size; 307 if (size > byte_count_limit) { 308 /* byte count limit must be even if this case */ 309 if (byte_count_limit & 1) 310 byte_count_limit--; 311 size = byte_count_limit; 312 } 313 s->lcyl = size; 314 s->hcyl = size >> 8; 315 s->elementary_transfer_size = size; 316 /* we cannot transmit more than one sector at a time */ 317 if (s->lba != -1) { 318 if (size > (s->cd_sector_size - s->io_buffer_index)) 319 size = (s->cd_sector_size - s->io_buffer_index); 320 } 321 s->packet_transfer_size -= size; 322 s->elementary_transfer_size -= size; 323 s->io_buffer_index += size; 324 ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, 325 size, ide_atapi_cmd_reply_end); 326 ide_set_irq(s->bus); 327 #ifdef DEBUG_IDE_ATAPI 328 printf("status=0x%x\n", s->status); 329 #endif 330 } 331 } 332 } 333 334 /* send a reply of 'size' bytes in s->io_buffer to an ATAPI command */ 335 static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size) 336 { 337 if (size > max_size) 338 size = max_size; 339 s->lba = -1; /* no sector read */ 340 s->packet_transfer_size = size; 341 s->io_buffer_size = size; /* dma: send the reply data as one chunk */ 342 s->elementary_transfer_size = 0; 343 344 if (s->atapi_dma) { 345 block_acct_start(blk_get_stats(s->blk), &s->acct, size, 346 BLOCK_ACCT_READ); 347 s->status = READY_STAT | SEEK_STAT | DRQ_STAT; 348 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 349 } else { 350 s->status = READY_STAT | SEEK_STAT; 351 s->io_buffer_index = 0; 352 ide_atapi_cmd_reply_end(s); 353 } 354 } 355 356 /* start a CD-CDROM read command */ 357 static void ide_atapi_cmd_read_pio(IDEState *s, int lba, int nb_sectors, 358 int sector_size) 359 { 360 s->lba = lba; 361 s->packet_transfer_size = nb_sectors * sector_size; 362 s->elementary_transfer_size = 0; 363 s->io_buffer_index = sector_size; 364 s->cd_sector_size = sector_size; 365 366 ide_atapi_cmd_reply_end(s); 367 } 368 369 static void ide_atapi_cmd_check_status(IDEState *s) 370 { 371 #ifdef DEBUG_IDE_ATAPI 372 printf("atapi_cmd_check_status\n"); 373 #endif 374 s->error = MC_ERR | (UNIT_ATTENTION << 4); 375 s->status = ERR_STAT; 376 s->nsector = 0; 377 ide_set_irq(s->bus); 378 } 379 /* ATAPI DMA support */ 380 381 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret) 382 { 383 IDEState *s = opaque; 384 int data_offset, n; 385 386 if (ret < 0) { 387 if (ide_handle_rw_error(s, -ret, ide_dma_cmd_to_retry(s->dma_cmd))) { 388 if (s->bus->error_status) { 389 s->bus->dma->aiocb = NULL; 390 return; 391 } 392 goto eot; 393 } 394 } 395 396 if (s->io_buffer_size > 0) { 397 /* 398 * For a cdrom read sector command (s->lba != -1), 399 * adjust the lba for the next s->io_buffer_size chunk 400 * and dma the current chunk. 401 * For a command != read (s->lba == -1), just transfer 402 * the reply data. 403 */ 404 if (s->lba != -1) { 405 if (s->cd_sector_size == 2352) { 406 n = 1; 407 cd_data_to_raw(s->io_buffer, s->lba); 408 } else { 409 n = s->io_buffer_size >> 11; 410 } 411 s->lba += n; 412 } 413 s->packet_transfer_size -= s->io_buffer_size; 414 if (s->bus->dma->ops->rw_buf(s->bus->dma, 1) == 0) 415 goto eot; 416 } 417 418 if (s->packet_transfer_size <= 0) { 419 s->status = READY_STAT | SEEK_STAT; 420 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 421 ide_set_irq(s->bus); 422 goto eot; 423 } 424 425 s->io_buffer_index = 0; 426 if (s->cd_sector_size == 2352) { 427 n = 1; 428 s->io_buffer_size = s->cd_sector_size; 429 data_offset = 16; 430 } else { 431 n = s->packet_transfer_size >> 11; 432 if (n > (IDE_DMA_BUF_SECTORS / 4)) 433 n = (IDE_DMA_BUF_SECTORS / 4); 434 s->io_buffer_size = n * 2048; 435 data_offset = 0; 436 } 437 #ifdef DEBUG_AIO 438 printf("aio_read_cd: lba=%u n=%d\n", s->lba, n); 439 #endif 440 441 s->bus->dma->iov.iov_base = (void *)(s->io_buffer + data_offset); 442 s->bus->dma->iov.iov_len = n * ATAPI_SECTOR_SIZE; 443 qemu_iovec_init_external(&s->bus->dma->qiov, &s->bus->dma->iov, 1); 444 445 s->bus->dma->aiocb = ide_buffered_readv(s, (int64_t)s->lba << 2, 446 &s->bus->dma->qiov, n * 4, 447 ide_atapi_cmd_read_dma_cb, s); 448 return; 449 450 eot: 451 if (ret < 0) { 452 block_acct_failed(blk_get_stats(s->blk), &s->acct); 453 } else { 454 block_acct_done(blk_get_stats(s->blk), &s->acct); 455 } 456 ide_set_inactive(s, false); 457 } 458 459 /* start a CD-CDROM read command with DMA */ 460 /* XXX: test if DMA is available */ 461 static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors, 462 int sector_size) 463 { 464 s->lba = lba; 465 s->packet_transfer_size = nb_sectors * sector_size; 466 s->io_buffer_size = 0; 467 s->cd_sector_size = sector_size; 468 469 block_acct_start(blk_get_stats(s->blk), &s->acct, s->packet_transfer_size, 470 BLOCK_ACCT_READ); 471 472 /* XXX: check if BUSY_STAT should be set */ 473 s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT; 474 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 475 } 476 477 static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors, 478 int sector_size) 479 { 480 #ifdef DEBUG_IDE_ATAPI 481 printf("read %s: LBA=%d nb_sectors=%d\n", s->atapi_dma ? "dma" : "pio", 482 lba, nb_sectors); 483 #endif 484 if (s->atapi_dma) { 485 ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size); 486 } else { 487 ide_atapi_cmd_read_pio(s, lba, nb_sectors, sector_size); 488 } 489 } 490 491 void ide_atapi_dma_restart(IDEState *s) 492 { 493 /* 494 * At this point we can just re-evaluate the packet command and start over. 495 * The presence of ->dma_cb callback in the pre_save ensures that the packet 496 * command has been completely sent and we can safely restart command. 497 */ 498 s->unit = s->bus->retry_unit; 499 s->bus->dma->ops->restart_dma(s->bus->dma); 500 ide_atapi_cmd(s); 501 } 502 503 static inline uint8_t ide_atapi_set_profile(uint8_t *buf, uint8_t *index, 504 uint16_t profile) 505 { 506 uint8_t *buf_profile = buf + 12; /* start of profiles */ 507 508 buf_profile += ((*index) * 4); /* start of indexed profile */ 509 cpu_to_ube16 (buf_profile, profile); 510 buf_profile[2] = ((buf_profile[0] == buf[6]) && (buf_profile[1] == buf[7])); 511 512 /* each profile adds 4 bytes to the response */ 513 (*index)++; 514 buf[11] += 4; /* Additional Length */ 515 516 return 4; 517 } 518 519 static int ide_dvd_read_structure(IDEState *s, int format, 520 const uint8_t *packet, uint8_t *buf) 521 { 522 switch (format) { 523 case 0x0: /* Physical format information */ 524 { 525 int layer = packet[6]; 526 uint64_t total_sectors; 527 528 if (layer != 0) 529 return -ASC_INV_FIELD_IN_CMD_PACKET; 530 531 total_sectors = s->nb_sectors >> 2; 532 if (total_sectors == 0) { 533 return -ASC_MEDIUM_NOT_PRESENT; 534 } 535 536 buf[4] = 1; /* DVD-ROM, part version 1 */ 537 buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ 538 buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ 539 buf[7] = 0; /* default densities */ 540 541 /* FIXME: 0x30000 per spec? */ 542 cpu_to_ube32(buf + 8, 0); /* start sector */ 543 cpu_to_ube32(buf + 12, total_sectors - 1); /* end sector */ 544 cpu_to_ube32(buf + 16, total_sectors - 1); /* l0 end sector */ 545 546 /* Size of buffer, not including 2 byte size field */ 547 stw_be_p(buf, 2048 + 2); 548 549 /* 2k data + 4 byte header */ 550 return (2048 + 4); 551 } 552 553 case 0x01: /* DVD copyright information */ 554 buf[4] = 0; /* no copyright data */ 555 buf[5] = 0; /* no region restrictions */ 556 557 /* Size of buffer, not including 2 byte size field */ 558 stw_be_p(buf, 4 + 2); 559 560 /* 4 byte header + 4 byte data */ 561 return (4 + 4); 562 563 case 0x03: /* BCA information - invalid field for no BCA info */ 564 return -ASC_INV_FIELD_IN_CMD_PACKET; 565 566 case 0x04: /* DVD disc manufacturing information */ 567 /* Size of buffer, not including 2 byte size field */ 568 stw_be_p(buf, 2048 + 2); 569 570 /* 2k data + 4 byte header */ 571 return (2048 + 4); 572 573 case 0xff: 574 /* 575 * This lists all the command capabilities above. Add new ones 576 * in order and update the length and buffer return values. 577 */ 578 579 buf[4] = 0x00; /* Physical format */ 580 buf[5] = 0x40; /* Not writable, is readable */ 581 stw_be_p(buf + 6, 2048 + 4); 582 583 buf[8] = 0x01; /* Copyright info */ 584 buf[9] = 0x40; /* Not writable, is readable */ 585 stw_be_p(buf + 10, 4 + 4); 586 587 buf[12] = 0x03; /* BCA info */ 588 buf[13] = 0x40; /* Not writable, is readable */ 589 stw_be_p(buf + 14, 188 + 4); 590 591 buf[16] = 0x04; /* Manufacturing info */ 592 buf[17] = 0x40; /* Not writable, is readable */ 593 stw_be_p(buf + 18, 2048 + 4); 594 595 /* Size of buffer, not including 2 byte size field */ 596 stw_be_p(buf, 16 + 2); 597 598 /* data written + 4 byte header */ 599 return (16 + 4); 600 601 default: /* TODO: formats beyond DVD-ROM requires */ 602 return -ASC_INV_FIELD_IN_CMD_PACKET; 603 } 604 } 605 606 static unsigned int event_status_media(IDEState *s, 607 uint8_t *buf) 608 { 609 uint8_t event_code, media_status; 610 611 media_status = 0; 612 if (s->tray_open) { 613 media_status = MS_TRAY_OPEN; 614 } else if (blk_is_inserted(s->blk)) { 615 media_status = MS_MEDIA_PRESENT; 616 } 617 618 /* Event notification descriptor */ 619 event_code = MEC_NO_CHANGE; 620 if (media_status != MS_TRAY_OPEN) { 621 if (s->events.new_media) { 622 event_code = MEC_NEW_MEDIA; 623 s->events.new_media = false; 624 } else if (s->events.eject_request) { 625 event_code = MEC_EJECT_REQUESTED; 626 s->events.eject_request = false; 627 } 628 } 629 630 buf[4] = event_code; 631 buf[5] = media_status; 632 633 /* These fields are reserved, just clear them. */ 634 buf[6] = 0; 635 buf[7] = 0; 636 637 return 8; /* We wrote to 4 extra bytes from the header */ 638 } 639 640 /* 641 * Before transferring data or otherwise signalling acceptance of a command 642 * marked CONDDATA, we must check the validity of the byte_count_limit. 643 */ 644 static bool validate_bcl(IDEState *s) 645 { 646 /* TODO: Check IDENTIFY data word 125 for defacult BCL (currently 0) */ 647 if (s->atapi_dma || atapi_byte_count_limit(s)) { 648 return true; 649 } 650 651 /* TODO: Move abort back into core.c and introduce proper error flow between 652 * ATAPI layer and IDE core layer */ 653 ide_abort_command(s); 654 return false; 655 } 656 657 static void cmd_get_event_status_notification(IDEState *s, 658 uint8_t *buf) 659 { 660 const uint8_t *packet = buf; 661 662 struct { 663 uint8_t opcode; 664 uint8_t polled; /* lsb bit is polled; others are reserved */ 665 uint8_t reserved2[2]; 666 uint8_t class; 667 uint8_t reserved3[2]; 668 uint16_t len; 669 uint8_t control; 670 } QEMU_PACKED *gesn_cdb; 671 672 struct { 673 uint16_t len; 674 uint8_t notification_class; 675 uint8_t supported_events; 676 } QEMU_PACKED *gesn_event_header; 677 unsigned int max_len, used_len; 678 679 gesn_cdb = (void *)packet; 680 gesn_event_header = (void *)buf; 681 682 max_len = be16_to_cpu(gesn_cdb->len); 683 684 /* It is fine by the MMC spec to not support async mode operations */ 685 if (!(gesn_cdb->polled & 0x01)) { /* asynchronous mode */ 686 /* Only polling is supported, asynchronous mode is not. */ 687 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 688 ASC_INV_FIELD_IN_CMD_PACKET); 689 return; 690 } 691 692 /* polling mode operation */ 693 694 /* 695 * These are the supported events. 696 * 697 * We currently only support requests of the 'media' type. 698 * Notification class requests and supported event classes are bitmasks, 699 * but they are build from the same values as the "notification class" 700 * field. 701 */ 702 gesn_event_header->supported_events = 1 << GESN_MEDIA; 703 704 /* 705 * We use |= below to set the class field; other bits in this byte 706 * are reserved now but this is useful to do if we have to use the 707 * reserved fields later. 708 */ 709 gesn_event_header->notification_class = 0; 710 711 /* 712 * Responses to requests are to be based on request priority. The 713 * notification_class_request_type enum above specifies the 714 * priority: upper elements are higher prio than lower ones. 715 */ 716 if (gesn_cdb->class & (1 << GESN_MEDIA)) { 717 gesn_event_header->notification_class |= GESN_MEDIA; 718 used_len = event_status_media(s, buf); 719 } else { 720 gesn_event_header->notification_class = 0x80; /* No event available */ 721 used_len = sizeof(*gesn_event_header); 722 } 723 gesn_event_header->len = cpu_to_be16(used_len 724 - sizeof(*gesn_event_header)); 725 ide_atapi_cmd_reply(s, used_len, max_len); 726 } 727 728 static void cmd_request_sense(IDEState *s, uint8_t *buf) 729 { 730 int max_len = buf[4]; 731 732 memset(buf, 0, 18); 733 buf[0] = 0x70 | (1 << 7); 734 buf[2] = s->sense_key; 735 buf[7] = 10; 736 buf[12] = s->asc; 737 738 if (s->sense_key == UNIT_ATTENTION) { 739 s->sense_key = NO_SENSE; 740 } 741 742 ide_atapi_cmd_reply(s, 18, max_len); 743 } 744 745 static void cmd_inquiry(IDEState *s, uint8_t *buf) 746 { 747 uint8_t page_code = buf[2]; 748 int max_len = buf[4]; 749 750 unsigned idx = 0; 751 unsigned size_idx; 752 unsigned preamble_len; 753 754 /* If the EVPD (Enable Vital Product Data) bit is set in byte 1, 755 * we are being asked for a specific page of info indicated by byte 2. */ 756 if (buf[1] & 0x01) { 757 preamble_len = 4; 758 size_idx = 3; 759 760 buf[idx++] = 0x05; /* CD-ROM */ 761 buf[idx++] = page_code; /* Page Code */ 762 buf[idx++] = 0x00; /* reserved */ 763 idx++; /* length (set later) */ 764 765 switch (page_code) { 766 case 0x00: 767 /* Supported Pages: List of supported VPD responses. */ 768 buf[idx++] = 0x00; /* 0x00: Supported Pages, and: */ 769 buf[idx++] = 0x83; /* 0x83: Device Identification. */ 770 break; 771 772 case 0x83: 773 /* Device Identification. Each entry is optional, but the entries 774 * included here are modeled after libata's VPD responses. 775 * If the response is given, at least one entry must be present. */ 776 777 /* Entry 1: Serial */ 778 if (idx + 24 > max_len) { 779 /* Not enough room for even the first entry: */ 780 /* 4 byte header + 20 byte string */ 781 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 782 ASC_DATA_PHASE_ERROR); 783 return; 784 } 785 buf[idx++] = 0x02; /* Ascii */ 786 buf[idx++] = 0x00; /* Vendor Specific */ 787 buf[idx++] = 0x00; 788 buf[idx++] = 20; /* Remaining length */ 789 padstr8(buf + idx, 20, s->drive_serial_str); 790 idx += 20; 791 792 /* Entry 2: Drive Model and Serial */ 793 if (idx + 72 > max_len) { 794 /* 4 (header) + 8 (vendor) + 60 (model & serial) */ 795 goto out; 796 } 797 buf[idx++] = 0x02; /* Ascii */ 798 buf[idx++] = 0x01; /* T10 Vendor */ 799 buf[idx++] = 0x00; 800 buf[idx++] = 68; 801 padstr8(buf + idx, 8, "ATA"); /* Generic T10 vendor */ 802 idx += 8; 803 padstr8(buf + idx, 40, s->drive_model_str); 804 idx += 40; 805 padstr8(buf + idx, 20, s->drive_serial_str); 806 idx += 20; 807 808 /* Entry 3: WWN */ 809 if (s->wwn && (idx + 12 <= max_len)) { 810 /* 4 byte header + 8 byte wwn */ 811 buf[idx++] = 0x01; /* Binary */ 812 buf[idx++] = 0x03; /* NAA */ 813 buf[idx++] = 0x00; 814 buf[idx++] = 0x08; 815 stq_be_p(&buf[idx], s->wwn); 816 idx += 8; 817 } 818 break; 819 820 default: 821 /* SPC-3, revision 23 sec. 6.4 */ 822 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 823 ASC_INV_FIELD_IN_CMD_PACKET); 824 return; 825 } 826 } else { 827 preamble_len = 5; 828 size_idx = 4; 829 830 buf[0] = 0x05; /* CD-ROM */ 831 buf[1] = 0x80; /* removable */ 832 buf[2] = 0x00; /* ISO */ 833 buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */ 834 /* buf[size_idx] set below. */ 835 buf[5] = 0; /* reserved */ 836 buf[6] = 0; /* reserved */ 837 buf[7] = 0; /* reserved */ 838 padstr8(buf + 8, 8, "QEMU"); 839 padstr8(buf + 16, 16, "QEMU DVD-ROM"); 840 padstr8(buf + 32, 4, s->version); 841 idx = 36; 842 } 843 844 out: 845 buf[size_idx] = idx - preamble_len; 846 ide_atapi_cmd_reply(s, idx, max_len); 847 } 848 849 static void cmd_get_configuration(IDEState *s, uint8_t *buf) 850 { 851 uint32_t len; 852 uint8_t index = 0; 853 int max_len; 854 855 /* only feature 0 is supported */ 856 if (buf[2] != 0 || buf[3] != 0) { 857 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 858 ASC_INV_FIELD_IN_CMD_PACKET); 859 return; 860 } 861 862 /* XXX: could result in alignment problems in some architectures */ 863 max_len = ube16_to_cpu(buf + 7); 864 865 /* 866 * XXX: avoid overflow for io_buffer if max_len is bigger than 867 * the size of that buffer (dimensioned to max number of 868 * sectors to transfer at once) 869 * 870 * Only a problem if the feature/profiles grow. 871 */ 872 if (max_len > 512) { 873 /* XXX: assume 1 sector */ 874 max_len = 512; 875 } 876 877 memset(buf, 0, max_len); 878 /* 879 * the number of sectors from the media tells us which profile 880 * to use as current. 0 means there is no media 881 */ 882 if (media_is_dvd(s)) { 883 cpu_to_ube16(buf + 6, MMC_PROFILE_DVD_ROM); 884 } else if (media_is_cd(s)) { 885 cpu_to_ube16(buf + 6, MMC_PROFILE_CD_ROM); 886 } 887 888 buf[10] = 0x02 | 0x01; /* persistent and current */ 889 len = 12; /* headers: 8 + 4 */ 890 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_DVD_ROM); 891 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_CD_ROM); 892 cpu_to_ube32(buf, len - 4); /* data length */ 893 894 ide_atapi_cmd_reply(s, len, max_len); 895 } 896 897 static void cmd_mode_sense(IDEState *s, uint8_t *buf) 898 { 899 int action, code; 900 int max_len; 901 902 max_len = ube16_to_cpu(buf + 7); 903 action = buf[2] >> 6; 904 code = buf[2] & 0x3f; 905 906 switch(action) { 907 case 0: /* current values */ 908 switch(code) { 909 case MODE_PAGE_R_W_ERROR: /* error recovery */ 910 cpu_to_ube16(&buf[0], 16 - 2); 911 buf[2] = 0x70; 912 buf[3] = 0; 913 buf[4] = 0; 914 buf[5] = 0; 915 buf[6] = 0; 916 buf[7] = 0; 917 918 buf[8] = MODE_PAGE_R_W_ERROR; 919 buf[9] = 16 - 10; 920 buf[10] = 0x00; 921 buf[11] = 0x05; 922 buf[12] = 0x00; 923 buf[13] = 0x00; 924 buf[14] = 0x00; 925 buf[15] = 0x00; 926 ide_atapi_cmd_reply(s, 16, max_len); 927 break; 928 case MODE_PAGE_AUDIO_CTL: 929 cpu_to_ube16(&buf[0], 24 - 2); 930 buf[2] = 0x70; 931 buf[3] = 0; 932 buf[4] = 0; 933 buf[5] = 0; 934 buf[6] = 0; 935 buf[7] = 0; 936 937 buf[8] = MODE_PAGE_AUDIO_CTL; 938 buf[9] = 24 - 10; 939 /* Fill with CDROM audio volume */ 940 buf[17] = 0; 941 buf[19] = 0; 942 buf[21] = 0; 943 buf[23] = 0; 944 945 ide_atapi_cmd_reply(s, 24, max_len); 946 break; 947 case MODE_PAGE_CAPABILITIES: 948 cpu_to_ube16(&buf[0], 30 - 2); 949 buf[2] = 0x70; 950 buf[3] = 0; 951 buf[4] = 0; 952 buf[5] = 0; 953 buf[6] = 0; 954 buf[7] = 0; 955 956 buf[8] = MODE_PAGE_CAPABILITIES; 957 buf[9] = 30 - 10; 958 buf[10] = 0x3b; /* read CDR/CDRW/DVDROM/DVDR/DVDRAM */ 959 buf[11] = 0x00; 960 961 /* Claim PLAY_AUDIO capability (0x01) since some Linux 962 code checks for this to automount media. */ 963 buf[12] = 0x71; 964 buf[13] = 3 << 5; 965 buf[14] = (1 << 0) | (1 << 3) | (1 << 5); 966 if (s->tray_locked) { 967 buf[14] |= 1 << 1; 968 } 969 buf[15] = 0x00; /* No volume & mute control, no changer */ 970 cpu_to_ube16(&buf[16], 704); /* 4x read speed */ 971 buf[18] = 0; /* Two volume levels */ 972 buf[19] = 2; 973 cpu_to_ube16(&buf[20], 512); /* 512k buffer */ 974 cpu_to_ube16(&buf[22], 704); /* 4x read speed current */ 975 buf[24] = 0; 976 buf[25] = 0; 977 buf[26] = 0; 978 buf[27] = 0; 979 buf[28] = 0; 980 buf[29] = 0; 981 ide_atapi_cmd_reply(s, 30, max_len); 982 break; 983 default: 984 goto error_cmd; 985 } 986 break; 987 case 1: /* changeable values */ 988 goto error_cmd; 989 case 2: /* default values */ 990 goto error_cmd; 991 default: 992 case 3: /* saved values */ 993 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 994 ASC_SAVING_PARAMETERS_NOT_SUPPORTED); 995 break; 996 } 997 return; 998 999 error_cmd: 1000 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET); 1001 } 1002 1003 static void cmd_test_unit_ready(IDEState *s, uint8_t *buf) 1004 { 1005 /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we 1006 * come here, we know that it's ready. */ 1007 ide_atapi_cmd_ok(s); 1008 } 1009 1010 static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf) 1011 { 1012 s->tray_locked = buf[4] & 1; 1013 blk_lock_medium(s->blk, buf[4] & 1); 1014 ide_atapi_cmd_ok(s); 1015 } 1016 1017 static void cmd_read(IDEState *s, uint8_t* buf) 1018 { 1019 int nb_sectors, lba; 1020 1021 if (buf[0] == GPCMD_READ_10) { 1022 nb_sectors = ube16_to_cpu(buf + 7); 1023 } else { 1024 nb_sectors = ube32_to_cpu(buf + 6); 1025 } 1026 1027 lba = ube32_to_cpu(buf + 2); 1028 if (nb_sectors == 0) { 1029 ide_atapi_cmd_ok(s); 1030 return; 1031 } 1032 1033 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 1034 } 1035 1036 static void cmd_read_cd(IDEState *s, uint8_t* buf) 1037 { 1038 int nb_sectors, lba, transfer_request; 1039 1040 nb_sectors = (buf[6] << 16) | (buf[7] << 8) | buf[8]; 1041 lba = ube32_to_cpu(buf + 2); 1042 1043 if (nb_sectors == 0) { 1044 ide_atapi_cmd_ok(s); 1045 return; 1046 } 1047 1048 transfer_request = buf[9] & 0xf8; 1049 if (transfer_request == 0x00) { 1050 /* nothing */ 1051 ide_atapi_cmd_ok(s); 1052 return; 1053 } 1054 1055 /* Check validity of BCL before transferring data */ 1056 if (!validate_bcl(s)) { 1057 return; 1058 } 1059 1060 switch (transfer_request) { 1061 case 0x10: 1062 /* normal read */ 1063 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 1064 break; 1065 case 0xf8: 1066 /* read all data */ 1067 ide_atapi_cmd_read(s, lba, nb_sectors, 2352); 1068 break; 1069 default: 1070 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1071 ASC_INV_FIELD_IN_CMD_PACKET); 1072 break; 1073 } 1074 } 1075 1076 static void cmd_seek(IDEState *s, uint8_t* buf) 1077 { 1078 unsigned int lba; 1079 uint64_t total_sectors = s->nb_sectors >> 2; 1080 1081 lba = ube32_to_cpu(buf + 2); 1082 if (lba >= total_sectors) { 1083 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR); 1084 return; 1085 } 1086 1087 ide_atapi_cmd_ok(s); 1088 } 1089 1090 static void cmd_start_stop_unit(IDEState *s, uint8_t* buf) 1091 { 1092 int sense; 1093 bool start = buf[4] & 1; 1094 bool loej = buf[4] & 2; /* load on start, eject on !start */ 1095 int pwrcnd = buf[4] & 0xf0; 1096 1097 if (pwrcnd) { 1098 /* eject/load only happens for power condition == 0 */ 1099 ide_atapi_cmd_ok(s); 1100 return; 1101 } 1102 1103 if (loej) { 1104 if (!start && !s->tray_open && s->tray_locked) { 1105 sense = blk_is_inserted(s->blk) 1106 ? NOT_READY : ILLEGAL_REQUEST; 1107 ide_atapi_cmd_error(s, sense, ASC_MEDIA_REMOVAL_PREVENTED); 1108 return; 1109 } 1110 1111 if (s->tray_open != !start) { 1112 blk_eject(s->blk, !start); 1113 s->tray_open = !start; 1114 } 1115 } 1116 1117 ide_atapi_cmd_ok(s); 1118 } 1119 1120 static void cmd_mechanism_status(IDEState *s, uint8_t* buf) 1121 { 1122 int max_len = ube16_to_cpu(buf + 8); 1123 1124 cpu_to_ube16(buf, 0); 1125 /* no current LBA */ 1126 buf[2] = 0; 1127 buf[3] = 0; 1128 buf[4] = 0; 1129 buf[5] = 1; 1130 cpu_to_ube16(buf + 6, 0); 1131 ide_atapi_cmd_reply(s, 8, max_len); 1132 } 1133 1134 static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf) 1135 { 1136 int format, msf, start_track, len; 1137 int max_len; 1138 uint64_t total_sectors = s->nb_sectors >> 2; 1139 1140 max_len = ube16_to_cpu(buf + 7); 1141 format = buf[9] >> 6; 1142 msf = (buf[1] >> 1) & 1; 1143 start_track = buf[6]; 1144 1145 switch(format) { 1146 case 0: 1147 len = cdrom_read_toc(total_sectors, buf, msf, start_track); 1148 if (len < 0) 1149 goto error_cmd; 1150 ide_atapi_cmd_reply(s, len, max_len); 1151 break; 1152 case 1: 1153 /* multi session : only a single session defined */ 1154 memset(buf, 0, 12); 1155 buf[1] = 0x0a; 1156 buf[2] = 0x01; 1157 buf[3] = 0x01; 1158 ide_atapi_cmd_reply(s, 12, max_len); 1159 break; 1160 case 2: 1161 len = cdrom_read_toc_raw(total_sectors, buf, msf, start_track); 1162 if (len < 0) 1163 goto error_cmd; 1164 ide_atapi_cmd_reply(s, len, max_len); 1165 break; 1166 default: 1167 error_cmd: 1168 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1169 ASC_INV_FIELD_IN_CMD_PACKET); 1170 } 1171 } 1172 1173 static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf) 1174 { 1175 uint64_t total_sectors = s->nb_sectors >> 2; 1176 1177 /* NOTE: it is really the number of sectors minus 1 */ 1178 cpu_to_ube32(buf, total_sectors - 1); 1179 cpu_to_ube32(buf + 4, 2048); 1180 ide_atapi_cmd_reply(s, 8, 8); 1181 } 1182 1183 static void cmd_read_disc_information(IDEState *s, uint8_t* buf) 1184 { 1185 uint8_t type = buf[1] & 7; 1186 uint32_t max_len = ube16_to_cpu(buf + 7); 1187 1188 /* Types 1/2 are only defined for Blu-Ray. */ 1189 if (type != 0) { 1190 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1191 ASC_INV_FIELD_IN_CMD_PACKET); 1192 return; 1193 } 1194 1195 memset(buf, 0, 34); 1196 buf[1] = 32; 1197 buf[2] = 0xe; /* last session complete, disc finalized */ 1198 buf[3] = 1; /* first track on disc */ 1199 buf[4] = 1; /* # of sessions */ 1200 buf[5] = 1; /* first track of last session */ 1201 buf[6] = 1; /* last track of last session */ 1202 buf[7] = 0x20; /* unrestricted use */ 1203 buf[8] = 0x00; /* CD-ROM or DVD-ROM */ 1204 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */ 1205 /* 12-23: not meaningful for CD-ROM or DVD-ROM */ 1206 /* 24-31: disc bar code */ 1207 /* 32: disc application code */ 1208 /* 33: number of OPC tables */ 1209 1210 ide_atapi_cmd_reply(s, 34, max_len); 1211 } 1212 1213 static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf) 1214 { 1215 int max_len; 1216 int media = buf[1]; 1217 int format = buf[7]; 1218 int ret; 1219 1220 max_len = ube16_to_cpu(buf + 8); 1221 1222 if (format < 0xff) { 1223 if (media_is_cd(s)) { 1224 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1225 ASC_INCOMPATIBLE_FORMAT); 1226 return; 1227 } else if (!media_present(s)) { 1228 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1229 ASC_INV_FIELD_IN_CMD_PACKET); 1230 return; 1231 } 1232 } 1233 1234 memset(buf, 0, max_len > IDE_DMA_BUF_SECTORS * 512 + 4 ? 1235 IDE_DMA_BUF_SECTORS * 512 + 4 : max_len); 1236 1237 switch (format) { 1238 case 0x00 ... 0x7f: 1239 case 0xff: 1240 if (media == 0) { 1241 ret = ide_dvd_read_structure(s, format, buf, buf); 1242 1243 if (ret < 0) { 1244 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, -ret); 1245 } else { 1246 ide_atapi_cmd_reply(s, ret, max_len); 1247 } 1248 1249 break; 1250 } 1251 /* TODO: BD support, fall through for now */ 1252 1253 /* Generic disk structures */ 1254 case 0x80: /* TODO: AACS volume identifier */ 1255 case 0x81: /* TODO: AACS media serial number */ 1256 case 0x82: /* TODO: AACS media identifier */ 1257 case 0x83: /* TODO: AACS media key block */ 1258 case 0x90: /* TODO: List of recognized format layers */ 1259 case 0xc0: /* TODO: Write protection status */ 1260 default: 1261 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1262 ASC_INV_FIELD_IN_CMD_PACKET); 1263 break; 1264 } 1265 } 1266 1267 static void cmd_set_speed(IDEState *s, uint8_t* buf) 1268 { 1269 ide_atapi_cmd_ok(s); 1270 } 1271 1272 enum { 1273 /* 1274 * Only commands flagged as ALLOW_UA are allowed to run under a 1275 * unit attention condition. (See MMC-5, section 4.1.6.1) 1276 */ 1277 ALLOW_UA = 0x01, 1278 1279 /* 1280 * Commands flagged with CHECK_READY can only execute if a medium is present. 1281 * Otherwise they report the Not Ready Condition. (See MMC-5, section 1282 * 4.1.8) 1283 */ 1284 CHECK_READY = 0x02, 1285 1286 /* 1287 * Commands flagged with NONDATA do not in any circumstances return 1288 * any data via ide_atapi_cmd_reply. These commands are exempt from 1289 * the normal byte_count_limit constraints. 1290 * See ATA8-ACS3 "7.21.5 Byte Count Limit" 1291 */ 1292 NONDATA = 0x04, 1293 1294 /* 1295 * CONDDATA implies a command that transfers data only conditionally based 1296 * on the presence of suboptions. It should be exempt from the BCL check at 1297 * command validation time, but it needs to be checked at the command 1298 * handler level instead. 1299 */ 1300 CONDDATA = 0x08, 1301 }; 1302 1303 static const struct AtapiCmd { 1304 void (*handler)(IDEState *s, uint8_t *buf); 1305 int flags; 1306 } atapi_cmd_table[0x100] = { 1307 [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY | NONDATA }, 1308 [ 0x03 ] = { cmd_request_sense, ALLOW_UA }, 1309 [ 0x12 ] = { cmd_inquiry, ALLOW_UA }, 1310 [ 0x1b ] = { cmd_start_stop_unit, NONDATA }, /* [1] */ 1311 [ 0x1e ] = { cmd_prevent_allow_medium_removal, NONDATA }, 1312 [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY }, 1313 [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY }, 1314 [ 0x2b ] = { cmd_seek, CHECK_READY | NONDATA }, 1315 [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY }, 1316 [ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, 1317 [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, 1318 [ 0x51 ] = { cmd_read_disc_information, CHECK_READY }, 1319 [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, 1320 [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY }, 1321 [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY }, 1322 [ 0xbb ] = { cmd_set_speed, NONDATA }, 1323 [ 0xbd ] = { cmd_mechanism_status, 0 }, 1324 [ 0xbe ] = { cmd_read_cd, CHECK_READY | CONDDATA }, 1325 /* [1] handler detects and reports not ready condition itself */ 1326 }; 1327 1328 void ide_atapi_cmd(IDEState *s) 1329 { 1330 uint8_t *buf = s->io_buffer; 1331 const struct AtapiCmd *cmd = &atapi_cmd_table[s->io_buffer[0]]; 1332 1333 #ifdef DEBUG_IDE_ATAPI 1334 { 1335 int i; 1336 printf("ATAPI limit=0x%x packet:", s->lcyl | (s->hcyl << 8)); 1337 for(i = 0; i < ATAPI_PACKET_SIZE; i++) { 1338 printf(" %02x", buf[i]); 1339 } 1340 printf("\n"); 1341 } 1342 #endif 1343 1344 /* 1345 * If there's a UNIT_ATTENTION condition pending, only command flagged with 1346 * ALLOW_UA are allowed to complete. with other commands getting a CHECK 1347 * condition response unless a higher priority status, defined by the drive 1348 * here, is pending. 1349 */ 1350 if (s->sense_key == UNIT_ATTENTION && !(cmd->flags & ALLOW_UA)) { 1351 ide_atapi_cmd_check_status(s); 1352 return; 1353 } 1354 /* 1355 * When a CD gets changed, we have to report an ejected state and 1356 * then a loaded state to guests so that they detect tray 1357 * open/close and media change events. Guests that do not use 1358 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close 1359 * states rely on this behavior. 1360 */ 1361 if (!(cmd->flags & ALLOW_UA) && 1362 !s->tray_open && blk_is_inserted(s->blk) && s->cdrom_changed) { 1363 1364 if (s->cdrom_changed == 1) { 1365 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1366 s->cdrom_changed = 2; 1367 } else { 1368 ide_atapi_cmd_error(s, UNIT_ATTENTION, ASC_MEDIUM_MAY_HAVE_CHANGED); 1369 s->cdrom_changed = 0; 1370 } 1371 1372 return; 1373 } 1374 1375 /* Report a Not Ready condition if appropriate for the command */ 1376 if ((cmd->flags & CHECK_READY) && 1377 (!media_present(s) || !blk_is_inserted(s->blk))) 1378 { 1379 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1380 return; 1381 } 1382 1383 /* Commands that don't transfer DATA permit the byte_count_limit to be 0. 1384 * If this is a data-transferring PIO command and BCL is 0, 1385 * we abort at the /ATA/ level, not the ATAPI level. 1386 * See ATA8 ACS3 section 7.17.6.49 and 7.21.5 */ 1387 if (cmd->handler && !(cmd->flags & (NONDATA | CONDDATA))) { 1388 if (!validate_bcl(s)) { 1389 return; 1390 } 1391 } 1392 1393 /* Execute the command */ 1394 if (cmd->handler) { 1395 cmd->handler(s, buf); 1396 return; 1397 } 1398 1399 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE); 1400 } 1401