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