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 "hw/ide/internal.h" 27 #include "hw/scsi/scsi.h" 28 #include "sysemu/block-backend.h" 29 30 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret); 31 32 static void padstr8(uint8_t *buf, int buf_size, const char *src) 33 { 34 int i; 35 for(i = 0; i < buf_size; i++) { 36 if (*src) 37 buf[i] = *src++; 38 else 39 buf[i] = ' '; 40 } 41 } 42 43 static inline void cpu_to_ube16(uint8_t *buf, int val) 44 { 45 buf[0] = val >> 8; 46 buf[1] = val & 0xff; 47 } 48 49 static inline void cpu_to_ube32(uint8_t *buf, unsigned int val) 50 { 51 buf[0] = val >> 24; 52 buf[1] = val >> 16; 53 buf[2] = val >> 8; 54 buf[3] = val & 0xff; 55 } 56 57 static inline int ube16_to_cpu(const uint8_t *buf) 58 { 59 return (buf[0] << 8) | buf[1]; 60 } 61 62 static inline int ube32_to_cpu(const uint8_t *buf) 63 { 64 return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; 65 } 66 67 static void lba_to_msf(uint8_t *buf, int lba) 68 { 69 lba += 150; 70 buf[0] = (lba / 75) / 60; 71 buf[1] = (lba / 75) % 60; 72 buf[2] = lba % 75; 73 } 74 75 static inline int media_present(IDEState *s) 76 { 77 return !s->tray_open && s->nb_sectors > 0; 78 } 79 80 /* XXX: DVDs that could fit on a CD will be reported as a CD */ 81 static inline int media_is_dvd(IDEState *s) 82 { 83 return (media_present(s) && s->nb_sectors > CD_MAX_SECTORS); 84 } 85 86 static inline int media_is_cd(IDEState *s) 87 { 88 return (media_present(s) && s->nb_sectors <= CD_MAX_SECTORS); 89 } 90 91 static void cd_data_to_raw(uint8_t *buf, int lba) 92 { 93 /* sync bytes */ 94 buf[0] = 0x00; 95 memset(buf + 1, 0xff, 10); 96 buf[11] = 0x00; 97 buf += 12; 98 /* MSF */ 99 lba_to_msf(buf, lba); 100 buf[3] = 0x01; /* mode 1 data */ 101 buf += 4; 102 /* data */ 103 buf += 2048; 104 /* XXX: ECC not computed */ 105 memset(buf, 0, 288); 106 } 107 108 static int 109 cd_read_sector_sync(IDEState *s) 110 { 111 int ret; 112 block_acct_start(blk_get_stats(s->blk), &s->acct, 113 4 * BDRV_SECTOR_SIZE, BLOCK_ACCT_READ); 114 115 #ifdef DEBUG_IDE_ATAPI 116 printf("cd_read_sector_sync: lba=%d\n", s->lba); 117 #endif 118 119 switch (s->cd_sector_size) { 120 case 2048: 121 ret = blk_read(s->blk, (int64_t)s->lba << 2, 122 s->io_buffer, 4); 123 break; 124 case 2352: 125 ret = blk_read(s->blk, (int64_t)s->lba << 2, 126 s->io_buffer + 16, 4); 127 if (ret >= 0) { 128 cd_data_to_raw(s->io_buffer, s->lba); 129 } 130 break; 131 default: 132 block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ); 133 return -EIO; 134 } 135 136 if (ret < 0) { 137 block_acct_failed(blk_get_stats(s->blk), &s->acct); 138 } else { 139 block_acct_done(blk_get_stats(s->blk), &s->acct); 140 s->lba++; 141 s->io_buffer_index = 0; 142 } 143 144 return ret; 145 } 146 147 static void cd_read_sector_cb(void *opaque, int ret) 148 { 149 IDEState *s = opaque; 150 151 block_acct_done(blk_get_stats(s->blk), &s->acct); 152 153 #ifdef DEBUG_IDE_ATAPI 154 printf("cd_read_sector_cb: lba=%d ret=%d\n", s->lba, ret); 155 #endif 156 157 if (ret < 0) { 158 ide_atapi_io_error(s, ret); 159 return; 160 } 161 162 if (s->cd_sector_size == 2352) { 163 cd_data_to_raw(s->io_buffer, s->lba); 164 } 165 166 s->lba++; 167 s->io_buffer_index = 0; 168 s->status &= ~BUSY_STAT; 169 170 ide_atapi_cmd_reply_end(s); 171 } 172 173 static int cd_read_sector(IDEState *s) 174 { 175 if (s->cd_sector_size != 2048 && s->cd_sector_size != 2352) { 176 return -EINVAL; 177 } 178 179 s->iov.iov_base = (s->cd_sector_size == 2352) ? 180 s->io_buffer + 16 : s->io_buffer; 181 182 s->iov.iov_len = 4 * BDRV_SECTOR_SIZE; 183 qemu_iovec_init_external(&s->qiov, &s->iov, 1); 184 185 #ifdef DEBUG_IDE_ATAPI 186 printf("cd_read_sector: lba=%d\n", s->lba); 187 #endif 188 189 block_acct_start(blk_get_stats(s->blk), &s->acct, 190 4 * BDRV_SECTOR_SIZE, BLOCK_ACCT_READ); 191 192 ide_buffered_readv(s, (int64_t)s->lba << 2, &s->qiov, 4, 193 cd_read_sector_cb, s); 194 195 s->status |= BUSY_STAT; 196 return 0; 197 } 198 199 void ide_atapi_cmd_ok(IDEState *s) 200 { 201 s->error = 0; 202 s->status = READY_STAT | SEEK_STAT; 203 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 204 ide_transfer_stop(s); 205 ide_set_irq(s->bus); 206 } 207 208 void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc) 209 { 210 #ifdef DEBUG_IDE_ATAPI 211 printf("atapi_cmd_error: sense=0x%x asc=0x%x\n", sense_key, asc); 212 #endif 213 s->error = sense_key << 4; 214 s->status = READY_STAT | ERR_STAT; 215 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 216 s->sense_key = sense_key; 217 s->asc = asc; 218 ide_transfer_stop(s); 219 ide_set_irq(s->bus); 220 } 221 222 void ide_atapi_io_error(IDEState *s, int ret) 223 { 224 /* XXX: handle more errors */ 225 if (ret == -ENOMEDIUM) { 226 ide_atapi_cmd_error(s, NOT_READY, 227 ASC_MEDIUM_NOT_PRESENT); 228 } else { 229 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 230 ASC_LOGICAL_BLOCK_OOR); 231 } 232 } 233 234 static uint16_t atapi_byte_count_limit(IDEState *s) 235 { 236 uint16_t bcl; 237 238 bcl = s->lcyl | (s->hcyl << 8); 239 if (bcl == 0xffff) { 240 return 0xfffe; 241 } 242 return bcl; 243 } 244 245 /* The whole ATAPI transfer logic is handled in this function */ 246 void ide_atapi_cmd_reply_end(IDEState *s) 247 { 248 int byte_count_limit, size, ret; 249 #ifdef DEBUG_IDE_ATAPI 250 printf("reply: tx_size=%d elem_tx_size=%d index=%d\n", 251 s->packet_transfer_size, 252 s->elementary_transfer_size, 253 s->io_buffer_index); 254 #endif 255 if (s->packet_transfer_size <= 0) { 256 /* end of transfer */ 257 ide_atapi_cmd_ok(s); 258 ide_set_irq(s->bus); 259 #ifdef DEBUG_IDE_ATAPI 260 printf("end of transfer, status=0x%x\n", s->status); 261 #endif 262 } else { 263 /* see if a new sector must be read */ 264 if (s->lba != -1 && s->io_buffer_index >= s->cd_sector_size) { 265 if (!s->elementary_transfer_size) { 266 ret = cd_read_sector(s); 267 if (ret < 0) { 268 ide_atapi_io_error(s, ret); 269 } 270 return; 271 } else { 272 /* rebuffering within an elementary transfer is 273 * only possible with a sync request because we 274 * end up with a race condition otherwise */ 275 ret = cd_read_sector_sync(s); 276 if (ret < 0) { 277 ide_atapi_io_error(s, ret); 278 return; 279 } 280 } 281 } 282 if (s->elementary_transfer_size > 0) { 283 /* there are some data left to transmit in this elementary 284 transfer */ 285 size = s->cd_sector_size - s->io_buffer_index; 286 if (size > s->elementary_transfer_size) 287 size = s->elementary_transfer_size; 288 s->packet_transfer_size -= size; 289 s->elementary_transfer_size -= size; 290 s->io_buffer_index += size; 291 ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, 292 size, ide_atapi_cmd_reply_end); 293 } else { 294 /* a new transfer is needed */ 295 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO; 296 byte_count_limit = atapi_byte_count_limit(s); 297 #ifdef DEBUG_IDE_ATAPI 298 printf("byte_count_limit=%d\n", byte_count_limit); 299 #endif 300 size = s->packet_transfer_size; 301 if (size > byte_count_limit) { 302 /* byte count limit must be even if this case */ 303 if (byte_count_limit & 1) 304 byte_count_limit--; 305 size = byte_count_limit; 306 } 307 s->lcyl = size; 308 s->hcyl = size >> 8; 309 s->elementary_transfer_size = size; 310 /* we cannot transmit more than one sector at a time */ 311 if (s->lba != -1) { 312 if (size > (s->cd_sector_size - s->io_buffer_index)) 313 size = (s->cd_sector_size - s->io_buffer_index); 314 } 315 s->packet_transfer_size -= size; 316 s->elementary_transfer_size -= size; 317 s->io_buffer_index += size; 318 ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, 319 size, ide_atapi_cmd_reply_end); 320 ide_set_irq(s->bus); 321 #ifdef DEBUG_IDE_ATAPI 322 printf("status=0x%x\n", s->status); 323 #endif 324 } 325 } 326 } 327 328 /* send a reply of 'size' bytes in s->io_buffer to an ATAPI command */ 329 static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size) 330 { 331 if (size > max_size) 332 size = max_size; 333 s->lba = -1; /* no sector read */ 334 s->packet_transfer_size = size; 335 s->io_buffer_size = size; /* dma: send the reply data as one chunk */ 336 s->elementary_transfer_size = 0; 337 338 if (s->atapi_dma) { 339 block_acct_start(blk_get_stats(s->blk), &s->acct, size, 340 BLOCK_ACCT_READ); 341 s->status = READY_STAT | SEEK_STAT | DRQ_STAT; 342 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 343 } else { 344 s->status = READY_STAT | SEEK_STAT; 345 s->io_buffer_index = 0; 346 ide_atapi_cmd_reply_end(s); 347 } 348 } 349 350 /* start a CD-CDROM read command */ 351 static void ide_atapi_cmd_read_pio(IDEState *s, int lba, int nb_sectors, 352 int sector_size) 353 { 354 s->lba = lba; 355 s->packet_transfer_size = nb_sectors * sector_size; 356 s->elementary_transfer_size = 0; 357 s->io_buffer_index = sector_size; 358 s->cd_sector_size = sector_size; 359 360 ide_atapi_cmd_reply_end(s); 361 } 362 363 static void ide_atapi_cmd_check_status(IDEState *s) 364 { 365 #ifdef DEBUG_IDE_ATAPI 366 printf("atapi_cmd_check_status\n"); 367 #endif 368 s->error = MC_ERR | (UNIT_ATTENTION << 4); 369 s->status = ERR_STAT; 370 s->nsector = 0; 371 ide_set_irq(s->bus); 372 } 373 /* ATAPI DMA support */ 374 375 /* XXX: handle read errors */ 376 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret) 377 { 378 IDEState *s = opaque; 379 int data_offset, n; 380 381 if (ret < 0) { 382 ide_atapi_io_error(s, ret); 383 goto eot; 384 } 385 386 if (s->io_buffer_size > 0) { 387 /* 388 * For a cdrom read sector command (s->lba != -1), 389 * adjust the lba for the next s->io_buffer_size chunk 390 * and dma the current chunk. 391 * For a command != read (s->lba == -1), just transfer 392 * the reply data. 393 */ 394 if (s->lba != -1) { 395 if (s->cd_sector_size == 2352) { 396 n = 1; 397 cd_data_to_raw(s->io_buffer, s->lba); 398 } else { 399 n = s->io_buffer_size >> 11; 400 } 401 s->lba += n; 402 } 403 s->packet_transfer_size -= s->io_buffer_size; 404 if (s->bus->dma->ops->rw_buf(s->bus->dma, 1) == 0) 405 goto eot; 406 } 407 408 if (s->packet_transfer_size <= 0) { 409 s->status = READY_STAT | SEEK_STAT; 410 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 411 ide_set_irq(s->bus); 412 goto eot; 413 } 414 415 s->io_buffer_index = 0; 416 if (s->cd_sector_size == 2352) { 417 n = 1; 418 s->io_buffer_size = s->cd_sector_size; 419 data_offset = 16; 420 } else { 421 n = s->packet_transfer_size >> 11; 422 if (n > (IDE_DMA_BUF_SECTORS / 4)) 423 n = (IDE_DMA_BUF_SECTORS / 4); 424 s->io_buffer_size = n * 2048; 425 data_offset = 0; 426 } 427 #ifdef DEBUG_AIO 428 printf("aio_read_cd: lba=%u n=%d\n", s->lba, n); 429 #endif 430 431 s->bus->dma->iov.iov_base = (void *)(s->io_buffer + data_offset); 432 s->bus->dma->iov.iov_len = n * 4 * 512; 433 qemu_iovec_init_external(&s->bus->dma->qiov, &s->bus->dma->iov, 1); 434 435 s->bus->dma->aiocb = ide_buffered_readv(s, (int64_t)s->lba << 2, 436 &s->bus->dma->qiov, n * 4, 437 ide_atapi_cmd_read_dma_cb, s); 438 return; 439 440 eot: 441 if (ret < 0) { 442 block_acct_failed(blk_get_stats(s->blk), &s->acct); 443 } else { 444 block_acct_done(blk_get_stats(s->blk), &s->acct); 445 } 446 ide_set_inactive(s, false); 447 } 448 449 /* start a CD-CDROM read command with DMA */ 450 /* XXX: test if DMA is available */ 451 static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors, 452 int sector_size) 453 { 454 s->lba = lba; 455 s->packet_transfer_size = nb_sectors * sector_size; 456 s->io_buffer_size = 0; 457 s->cd_sector_size = sector_size; 458 459 block_acct_start(blk_get_stats(s->blk), &s->acct, s->packet_transfer_size, 460 BLOCK_ACCT_READ); 461 462 /* XXX: check if BUSY_STAT should be set */ 463 s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT; 464 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 465 } 466 467 static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors, 468 int sector_size) 469 { 470 #ifdef DEBUG_IDE_ATAPI 471 printf("read %s: LBA=%d nb_sectors=%d\n", s->atapi_dma ? "dma" : "pio", 472 lba, nb_sectors); 473 #endif 474 if (s->atapi_dma) { 475 ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size); 476 } else { 477 ide_atapi_cmd_read_pio(s, lba, nb_sectors, sector_size); 478 } 479 } 480 481 482 /* Called by *_restart_bh when the transfer function points 483 * to ide_atapi_cmd 484 */ 485 void ide_atapi_dma_restart(IDEState *s) 486 { 487 /* 488 * I'm not sure we have enough stored to restart the command 489 * safely, so give the guest an error it should recover from. 490 * I'm assuming most guests will try to recover from something 491 * listed as a medium error on a CD; it seems to work on Linux. 492 * This would be more of a problem if we did any other type of 493 * DMA operation. 494 */ 495 ide_atapi_cmd_error(s, MEDIUM_ERROR, ASC_NO_SEEK_COMPLETE); 496 } 497 498 static inline uint8_t ide_atapi_set_profile(uint8_t *buf, uint8_t *index, 499 uint16_t profile) 500 { 501 uint8_t *buf_profile = buf + 12; /* start of profiles */ 502 503 buf_profile += ((*index) * 4); /* start of indexed profile */ 504 cpu_to_ube16 (buf_profile, profile); 505 buf_profile[2] = ((buf_profile[0] == buf[6]) && (buf_profile[1] == buf[7])); 506 507 /* each profile adds 4 bytes to the response */ 508 (*index)++; 509 buf[11] += 4; /* Additional Length */ 510 511 return 4; 512 } 513 514 static int ide_dvd_read_structure(IDEState *s, int format, 515 const uint8_t *packet, uint8_t *buf) 516 { 517 switch (format) { 518 case 0x0: /* Physical format information */ 519 { 520 int layer = packet[6]; 521 uint64_t total_sectors; 522 523 if (layer != 0) 524 return -ASC_INV_FIELD_IN_CMD_PACKET; 525 526 total_sectors = s->nb_sectors >> 2; 527 if (total_sectors == 0) { 528 return -ASC_MEDIUM_NOT_PRESENT; 529 } 530 531 buf[4] = 1; /* DVD-ROM, part version 1 */ 532 buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ 533 buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ 534 buf[7] = 0; /* default densities */ 535 536 /* FIXME: 0x30000 per spec? */ 537 cpu_to_ube32(buf + 8, 0); /* start sector */ 538 cpu_to_ube32(buf + 12, total_sectors - 1); /* end sector */ 539 cpu_to_ube32(buf + 16, total_sectors - 1); /* l0 end sector */ 540 541 /* Size of buffer, not including 2 byte size field */ 542 stw_be_p(buf, 2048 + 2); 543 544 /* 2k data + 4 byte header */ 545 return (2048 + 4); 546 } 547 548 case 0x01: /* DVD copyright information */ 549 buf[4] = 0; /* no copyright data */ 550 buf[5] = 0; /* no region restrictions */ 551 552 /* Size of buffer, not including 2 byte size field */ 553 stw_be_p(buf, 4 + 2); 554 555 /* 4 byte header + 4 byte data */ 556 return (4 + 4); 557 558 case 0x03: /* BCA information - invalid field for no BCA info */ 559 return -ASC_INV_FIELD_IN_CMD_PACKET; 560 561 case 0x04: /* DVD disc manufacturing information */ 562 /* Size of buffer, not including 2 byte size field */ 563 stw_be_p(buf, 2048 + 2); 564 565 /* 2k data + 4 byte header */ 566 return (2048 + 4); 567 568 case 0xff: 569 /* 570 * This lists all the command capabilities above. Add new ones 571 * in order and update the length and buffer return values. 572 */ 573 574 buf[4] = 0x00; /* Physical format */ 575 buf[5] = 0x40; /* Not writable, is readable */ 576 stw_be_p(buf + 6, 2048 + 4); 577 578 buf[8] = 0x01; /* Copyright info */ 579 buf[9] = 0x40; /* Not writable, is readable */ 580 stw_be_p(buf + 10, 4 + 4); 581 582 buf[12] = 0x03; /* BCA info */ 583 buf[13] = 0x40; /* Not writable, is readable */ 584 stw_be_p(buf + 14, 188 + 4); 585 586 buf[16] = 0x04; /* Manufacturing info */ 587 buf[17] = 0x40; /* Not writable, is readable */ 588 stw_be_p(buf + 18, 2048 + 4); 589 590 /* Size of buffer, not including 2 byte size field */ 591 stw_be_p(buf, 16 + 2); 592 593 /* data written + 4 byte header */ 594 return (16 + 4); 595 596 default: /* TODO: formats beyond DVD-ROM requires */ 597 return -ASC_INV_FIELD_IN_CMD_PACKET; 598 } 599 } 600 601 static unsigned int event_status_media(IDEState *s, 602 uint8_t *buf) 603 { 604 uint8_t event_code, media_status; 605 606 media_status = 0; 607 if (s->tray_open) { 608 media_status = MS_TRAY_OPEN; 609 } else if (blk_is_inserted(s->blk)) { 610 media_status = MS_MEDIA_PRESENT; 611 } 612 613 /* Event notification descriptor */ 614 event_code = MEC_NO_CHANGE; 615 if (media_status != MS_TRAY_OPEN) { 616 if (s->events.new_media) { 617 event_code = MEC_NEW_MEDIA; 618 s->events.new_media = false; 619 } else if (s->events.eject_request) { 620 event_code = MEC_EJECT_REQUESTED; 621 s->events.eject_request = false; 622 } 623 } 624 625 buf[4] = event_code; 626 buf[5] = media_status; 627 628 /* These fields are reserved, just clear them. */ 629 buf[6] = 0; 630 buf[7] = 0; 631 632 return 8; /* We wrote to 4 extra bytes from the header */ 633 } 634 635 static void cmd_get_event_status_notification(IDEState *s, 636 uint8_t *buf) 637 { 638 const uint8_t *packet = buf; 639 640 struct { 641 uint8_t opcode; 642 uint8_t polled; /* lsb bit is polled; others are reserved */ 643 uint8_t reserved2[2]; 644 uint8_t class; 645 uint8_t reserved3[2]; 646 uint16_t len; 647 uint8_t control; 648 } QEMU_PACKED *gesn_cdb; 649 650 struct { 651 uint16_t len; 652 uint8_t notification_class; 653 uint8_t supported_events; 654 } QEMU_PACKED *gesn_event_header; 655 unsigned int max_len, used_len; 656 657 gesn_cdb = (void *)packet; 658 gesn_event_header = (void *)buf; 659 660 max_len = be16_to_cpu(gesn_cdb->len); 661 662 /* It is fine by the MMC spec to not support async mode operations */ 663 if (!(gesn_cdb->polled & 0x01)) { /* asynchronous mode */ 664 /* Only polling is supported, asynchronous mode is not. */ 665 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 666 ASC_INV_FIELD_IN_CMD_PACKET); 667 return; 668 } 669 670 /* polling mode operation */ 671 672 /* 673 * These are the supported events. 674 * 675 * We currently only support requests of the 'media' type. 676 * Notification class requests and supported event classes are bitmasks, 677 * but they are build from the same values as the "notification class" 678 * field. 679 */ 680 gesn_event_header->supported_events = 1 << GESN_MEDIA; 681 682 /* 683 * We use |= below to set the class field; other bits in this byte 684 * are reserved now but this is useful to do if we have to use the 685 * reserved fields later. 686 */ 687 gesn_event_header->notification_class = 0; 688 689 /* 690 * Responses to requests are to be based on request priority. The 691 * notification_class_request_type enum above specifies the 692 * priority: upper elements are higher prio than lower ones. 693 */ 694 if (gesn_cdb->class & (1 << GESN_MEDIA)) { 695 gesn_event_header->notification_class |= GESN_MEDIA; 696 used_len = event_status_media(s, buf); 697 } else { 698 gesn_event_header->notification_class = 0x80; /* No event available */ 699 used_len = sizeof(*gesn_event_header); 700 } 701 gesn_event_header->len = cpu_to_be16(used_len 702 - sizeof(*gesn_event_header)); 703 ide_atapi_cmd_reply(s, used_len, max_len); 704 } 705 706 static void cmd_request_sense(IDEState *s, uint8_t *buf) 707 { 708 int max_len = buf[4]; 709 710 memset(buf, 0, 18); 711 buf[0] = 0x70 | (1 << 7); 712 buf[2] = s->sense_key; 713 buf[7] = 10; 714 buf[12] = s->asc; 715 716 if (s->sense_key == UNIT_ATTENTION) { 717 s->sense_key = NO_SENSE; 718 } 719 720 ide_atapi_cmd_reply(s, 18, max_len); 721 } 722 723 static void cmd_inquiry(IDEState *s, uint8_t *buf) 724 { 725 uint8_t page_code = buf[2]; 726 int max_len = buf[4]; 727 728 unsigned idx = 0; 729 unsigned size_idx; 730 unsigned preamble_len; 731 732 /* If the EVPD (Enable Vital Product Data) bit is set in byte 1, 733 * we are being asked for a specific page of info indicated by byte 2. */ 734 if (buf[1] & 0x01) { 735 preamble_len = 4; 736 size_idx = 3; 737 738 buf[idx++] = 0x05; /* CD-ROM */ 739 buf[idx++] = page_code; /* Page Code */ 740 buf[idx++] = 0x00; /* reserved */ 741 idx++; /* length (set later) */ 742 743 switch (page_code) { 744 case 0x00: 745 /* Supported Pages: List of supported VPD responses. */ 746 buf[idx++] = 0x00; /* 0x00: Supported Pages, and: */ 747 buf[idx++] = 0x83; /* 0x83: Device Identification. */ 748 break; 749 750 case 0x83: 751 /* Device Identification. Each entry is optional, but the entries 752 * included here are modeled after libata's VPD responses. 753 * If the response is given, at least one entry must be present. */ 754 755 /* Entry 1: Serial */ 756 if (idx + 24 > max_len) { 757 /* Not enough room for even the first entry: */ 758 /* 4 byte header + 20 byte string */ 759 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 760 ASC_DATA_PHASE_ERROR); 761 return; 762 } 763 buf[idx++] = 0x02; /* Ascii */ 764 buf[idx++] = 0x00; /* Vendor Specific */ 765 buf[idx++] = 0x00; 766 buf[idx++] = 20; /* Remaining length */ 767 padstr8(buf + idx, 20, s->drive_serial_str); 768 idx += 20; 769 770 /* Entry 2: Drive Model and Serial */ 771 if (idx + 72 > max_len) { 772 /* 4 (header) + 8 (vendor) + 60 (model & serial) */ 773 goto out; 774 } 775 buf[idx++] = 0x02; /* Ascii */ 776 buf[idx++] = 0x01; /* T10 Vendor */ 777 buf[idx++] = 0x00; 778 buf[idx++] = 68; 779 padstr8(buf + idx, 8, "ATA"); /* Generic T10 vendor */ 780 idx += 8; 781 padstr8(buf + idx, 40, s->drive_model_str); 782 idx += 40; 783 padstr8(buf + idx, 20, s->drive_serial_str); 784 idx += 20; 785 786 /* Entry 3: WWN */ 787 if (s->wwn && (idx + 12 <= max_len)) { 788 /* 4 byte header + 8 byte wwn */ 789 buf[idx++] = 0x01; /* Binary */ 790 buf[idx++] = 0x03; /* NAA */ 791 buf[idx++] = 0x00; 792 buf[idx++] = 0x08; 793 stq_be_p(&buf[idx], s->wwn); 794 idx += 8; 795 } 796 break; 797 798 default: 799 /* SPC-3, revision 23 sec. 6.4 */ 800 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 801 ASC_INV_FIELD_IN_CMD_PACKET); 802 return; 803 } 804 } else { 805 preamble_len = 5; 806 size_idx = 4; 807 808 buf[0] = 0x05; /* CD-ROM */ 809 buf[1] = 0x80; /* removable */ 810 buf[2] = 0x00; /* ISO */ 811 buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */ 812 /* buf[size_idx] set below. */ 813 buf[5] = 0; /* reserved */ 814 buf[6] = 0; /* reserved */ 815 buf[7] = 0; /* reserved */ 816 padstr8(buf + 8, 8, "QEMU"); 817 padstr8(buf + 16, 16, "QEMU DVD-ROM"); 818 padstr8(buf + 32, 4, s->version); 819 idx = 36; 820 } 821 822 out: 823 buf[size_idx] = idx - preamble_len; 824 ide_atapi_cmd_reply(s, idx, max_len); 825 return; 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