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 return; 390 } 391 goto eot; 392 } 393 } 394 395 if (s->io_buffer_size > 0) { 396 /* 397 * For a cdrom read sector command (s->lba != -1), 398 * adjust the lba for the next s->io_buffer_size chunk 399 * and dma the current chunk. 400 * For a command != read (s->lba == -1), just transfer 401 * the reply data. 402 */ 403 if (s->lba != -1) { 404 if (s->cd_sector_size == 2352) { 405 n = 1; 406 cd_data_to_raw(s->io_buffer, s->lba); 407 } else { 408 n = s->io_buffer_size >> 11; 409 } 410 s->lba += n; 411 } 412 s->packet_transfer_size -= s->io_buffer_size; 413 if (s->bus->dma->ops->rw_buf(s->bus->dma, 1) == 0) 414 goto eot; 415 } 416 417 if (s->packet_transfer_size <= 0) { 418 s->status = READY_STAT | SEEK_STAT; 419 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 420 ide_set_irq(s->bus); 421 goto eot; 422 } 423 424 s->io_buffer_index = 0; 425 if (s->cd_sector_size == 2352) { 426 n = 1; 427 s->io_buffer_size = s->cd_sector_size; 428 data_offset = 16; 429 } else { 430 n = s->packet_transfer_size >> 11; 431 if (n > (IDE_DMA_BUF_SECTORS / 4)) 432 n = (IDE_DMA_BUF_SECTORS / 4); 433 s->io_buffer_size = n * 2048; 434 data_offset = 0; 435 } 436 #ifdef DEBUG_AIO 437 printf("aio_read_cd: lba=%u n=%d\n", s->lba, n); 438 #endif 439 440 s->bus->dma->iov.iov_base = (void *)(s->io_buffer + data_offset); 441 s->bus->dma->iov.iov_len = n * ATAPI_SECTOR_SIZE; 442 qemu_iovec_init_external(&s->bus->dma->qiov, &s->bus->dma->iov, 1); 443 444 s->bus->dma->aiocb = ide_buffered_readv(s, (int64_t)s->lba << 2, 445 &s->bus->dma->qiov, n * 4, 446 ide_atapi_cmd_read_dma_cb, s); 447 return; 448 449 eot: 450 if (ret < 0) { 451 block_acct_failed(blk_get_stats(s->blk), &s->acct); 452 } else { 453 block_acct_done(blk_get_stats(s->blk), &s->acct); 454 } 455 ide_set_inactive(s, false); 456 } 457 458 /* start a CD-CDROM read command with DMA */ 459 /* XXX: test if DMA is available */ 460 static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors, 461 int sector_size) 462 { 463 s->lba = lba; 464 s->packet_transfer_size = nb_sectors * sector_size; 465 s->io_buffer_size = 0; 466 s->cd_sector_size = sector_size; 467 468 block_acct_start(blk_get_stats(s->blk), &s->acct, s->packet_transfer_size, 469 BLOCK_ACCT_READ); 470 471 /* XXX: check if BUSY_STAT should be set */ 472 s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT; 473 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 474 } 475 476 static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors, 477 int sector_size) 478 { 479 #ifdef DEBUG_IDE_ATAPI 480 printf("read %s: LBA=%d nb_sectors=%d\n", s->atapi_dma ? "dma" : "pio", 481 lba, nb_sectors); 482 #endif 483 if (s->atapi_dma) { 484 ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size); 485 } else { 486 ide_atapi_cmd_read_pio(s, lba, nb_sectors, sector_size); 487 } 488 } 489 490 void ide_atapi_dma_restart(IDEState *s) 491 { 492 /* 493 * At this point we can just re-evaluate the packet command and start over. 494 * The presence of ->dma_cb callback in the pre_save ensures that the packet 495 * command has been completely sent and we can safely restart command. 496 */ 497 s->unit = s->bus->retry_unit; 498 s->bus->dma->ops->restart_dma(s->bus->dma); 499 ide_atapi_cmd(s); 500 } 501 502 static inline uint8_t ide_atapi_set_profile(uint8_t *buf, uint8_t *index, 503 uint16_t profile) 504 { 505 uint8_t *buf_profile = buf + 12; /* start of profiles */ 506 507 buf_profile += ((*index) * 4); /* start of indexed profile */ 508 cpu_to_ube16 (buf_profile, profile); 509 buf_profile[2] = ((buf_profile[0] == buf[6]) && (buf_profile[1] == buf[7])); 510 511 /* each profile adds 4 bytes to the response */ 512 (*index)++; 513 buf[11] += 4; /* Additional Length */ 514 515 return 4; 516 } 517 518 static int ide_dvd_read_structure(IDEState *s, int format, 519 const uint8_t *packet, uint8_t *buf) 520 { 521 switch (format) { 522 case 0x0: /* Physical format information */ 523 { 524 int layer = packet[6]; 525 uint64_t total_sectors; 526 527 if (layer != 0) 528 return -ASC_INV_FIELD_IN_CMD_PACKET; 529 530 total_sectors = s->nb_sectors >> 2; 531 if (total_sectors == 0) { 532 return -ASC_MEDIUM_NOT_PRESENT; 533 } 534 535 buf[4] = 1; /* DVD-ROM, part version 1 */ 536 buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ 537 buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ 538 buf[7] = 0; /* default densities */ 539 540 /* FIXME: 0x30000 per spec? */ 541 cpu_to_ube32(buf + 8, 0); /* start sector */ 542 cpu_to_ube32(buf + 12, total_sectors - 1); /* end sector */ 543 cpu_to_ube32(buf + 16, total_sectors - 1); /* l0 end sector */ 544 545 /* Size of buffer, not including 2 byte size field */ 546 stw_be_p(buf, 2048 + 2); 547 548 /* 2k data + 4 byte header */ 549 return (2048 + 4); 550 } 551 552 case 0x01: /* DVD copyright information */ 553 buf[4] = 0; /* no copyright data */ 554 buf[5] = 0; /* no region restrictions */ 555 556 /* Size of buffer, not including 2 byte size field */ 557 stw_be_p(buf, 4 + 2); 558 559 /* 4 byte header + 4 byte data */ 560 return (4 + 4); 561 562 case 0x03: /* BCA information - invalid field for no BCA info */ 563 return -ASC_INV_FIELD_IN_CMD_PACKET; 564 565 case 0x04: /* DVD disc manufacturing information */ 566 /* Size of buffer, not including 2 byte size field */ 567 stw_be_p(buf, 2048 + 2); 568 569 /* 2k data + 4 byte header */ 570 return (2048 + 4); 571 572 case 0xff: 573 /* 574 * This lists all the command capabilities above. Add new ones 575 * in order and update the length and buffer return values. 576 */ 577 578 buf[4] = 0x00; /* Physical format */ 579 buf[5] = 0x40; /* Not writable, is readable */ 580 stw_be_p(buf + 6, 2048 + 4); 581 582 buf[8] = 0x01; /* Copyright info */ 583 buf[9] = 0x40; /* Not writable, is readable */ 584 stw_be_p(buf + 10, 4 + 4); 585 586 buf[12] = 0x03; /* BCA info */ 587 buf[13] = 0x40; /* Not writable, is readable */ 588 stw_be_p(buf + 14, 188 + 4); 589 590 buf[16] = 0x04; /* Manufacturing info */ 591 buf[17] = 0x40; /* Not writable, is readable */ 592 stw_be_p(buf + 18, 2048 + 4); 593 594 /* Size of buffer, not including 2 byte size field */ 595 stw_be_p(buf, 16 + 2); 596 597 /* data written + 4 byte header */ 598 return (16 + 4); 599 600 default: /* TODO: formats beyond DVD-ROM requires */ 601 return -ASC_INV_FIELD_IN_CMD_PACKET; 602 } 603 } 604 605 static unsigned int event_status_media(IDEState *s, 606 uint8_t *buf) 607 { 608 uint8_t event_code, media_status; 609 610 media_status = 0; 611 if (s->tray_open) { 612 media_status = MS_TRAY_OPEN; 613 } else if (blk_is_inserted(s->blk)) { 614 media_status = MS_MEDIA_PRESENT; 615 } 616 617 /* Event notification descriptor */ 618 event_code = MEC_NO_CHANGE; 619 if (media_status != MS_TRAY_OPEN) { 620 if (s->events.new_media) { 621 event_code = MEC_NEW_MEDIA; 622 s->events.new_media = false; 623 } else if (s->events.eject_request) { 624 event_code = MEC_EJECT_REQUESTED; 625 s->events.eject_request = false; 626 } 627 } 628 629 buf[4] = event_code; 630 buf[5] = media_status; 631 632 /* These fields are reserved, just clear them. */ 633 buf[6] = 0; 634 buf[7] = 0; 635 636 return 8; /* We wrote to 4 extra bytes from the header */ 637 } 638 639 static void cmd_get_event_status_notification(IDEState *s, 640 uint8_t *buf) 641 { 642 const uint8_t *packet = buf; 643 644 struct { 645 uint8_t opcode; 646 uint8_t polled; /* lsb bit is polled; others are reserved */ 647 uint8_t reserved2[2]; 648 uint8_t class; 649 uint8_t reserved3[2]; 650 uint16_t len; 651 uint8_t control; 652 } QEMU_PACKED *gesn_cdb; 653 654 struct { 655 uint16_t len; 656 uint8_t notification_class; 657 uint8_t supported_events; 658 } QEMU_PACKED *gesn_event_header; 659 unsigned int max_len, used_len; 660 661 gesn_cdb = (void *)packet; 662 gesn_event_header = (void *)buf; 663 664 max_len = be16_to_cpu(gesn_cdb->len); 665 666 /* It is fine by the MMC spec to not support async mode operations */ 667 if (!(gesn_cdb->polled & 0x01)) { /* asynchronous mode */ 668 /* Only polling is supported, asynchronous mode is not. */ 669 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 670 ASC_INV_FIELD_IN_CMD_PACKET); 671 return; 672 } 673 674 /* polling mode operation */ 675 676 /* 677 * These are the supported events. 678 * 679 * We currently only support requests of the 'media' type. 680 * Notification class requests and supported event classes are bitmasks, 681 * but they are build from the same values as the "notification class" 682 * field. 683 */ 684 gesn_event_header->supported_events = 1 << GESN_MEDIA; 685 686 /* 687 * We use |= below to set the class field; other bits in this byte 688 * are reserved now but this is useful to do if we have to use the 689 * reserved fields later. 690 */ 691 gesn_event_header->notification_class = 0; 692 693 /* 694 * Responses to requests are to be based on request priority. The 695 * notification_class_request_type enum above specifies the 696 * priority: upper elements are higher prio than lower ones. 697 */ 698 if (gesn_cdb->class & (1 << GESN_MEDIA)) { 699 gesn_event_header->notification_class |= GESN_MEDIA; 700 used_len = event_status_media(s, buf); 701 } else { 702 gesn_event_header->notification_class = 0x80; /* No event available */ 703 used_len = sizeof(*gesn_event_header); 704 } 705 gesn_event_header->len = cpu_to_be16(used_len 706 - sizeof(*gesn_event_header)); 707 ide_atapi_cmd_reply(s, used_len, max_len); 708 } 709 710 static void cmd_request_sense(IDEState *s, uint8_t *buf) 711 { 712 int max_len = buf[4]; 713 714 memset(buf, 0, 18); 715 buf[0] = 0x70 | (1 << 7); 716 buf[2] = s->sense_key; 717 buf[7] = 10; 718 buf[12] = s->asc; 719 720 if (s->sense_key == UNIT_ATTENTION) { 721 s->sense_key = NO_SENSE; 722 } 723 724 ide_atapi_cmd_reply(s, 18, max_len); 725 } 726 727 static void cmd_inquiry(IDEState *s, uint8_t *buf) 728 { 729 uint8_t page_code = buf[2]; 730 int max_len = buf[4]; 731 732 unsigned idx = 0; 733 unsigned size_idx; 734 unsigned preamble_len; 735 736 /* If the EVPD (Enable Vital Product Data) bit is set in byte 1, 737 * we are being asked for a specific page of info indicated by byte 2. */ 738 if (buf[1] & 0x01) { 739 preamble_len = 4; 740 size_idx = 3; 741 742 buf[idx++] = 0x05; /* CD-ROM */ 743 buf[idx++] = page_code; /* Page Code */ 744 buf[idx++] = 0x00; /* reserved */ 745 idx++; /* length (set later) */ 746 747 switch (page_code) { 748 case 0x00: 749 /* Supported Pages: List of supported VPD responses. */ 750 buf[idx++] = 0x00; /* 0x00: Supported Pages, and: */ 751 buf[idx++] = 0x83; /* 0x83: Device Identification. */ 752 break; 753 754 case 0x83: 755 /* Device Identification. Each entry is optional, but the entries 756 * included here are modeled after libata's VPD responses. 757 * If the response is given, at least one entry must be present. */ 758 759 /* Entry 1: Serial */ 760 if (idx + 24 > max_len) { 761 /* Not enough room for even the first entry: */ 762 /* 4 byte header + 20 byte string */ 763 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 764 ASC_DATA_PHASE_ERROR); 765 return; 766 } 767 buf[idx++] = 0x02; /* Ascii */ 768 buf[idx++] = 0x00; /* Vendor Specific */ 769 buf[idx++] = 0x00; 770 buf[idx++] = 20; /* Remaining length */ 771 padstr8(buf + idx, 20, s->drive_serial_str); 772 idx += 20; 773 774 /* Entry 2: Drive Model and Serial */ 775 if (idx + 72 > max_len) { 776 /* 4 (header) + 8 (vendor) + 60 (model & serial) */ 777 goto out; 778 } 779 buf[idx++] = 0x02; /* Ascii */ 780 buf[idx++] = 0x01; /* T10 Vendor */ 781 buf[idx++] = 0x00; 782 buf[idx++] = 68; 783 padstr8(buf + idx, 8, "ATA"); /* Generic T10 vendor */ 784 idx += 8; 785 padstr8(buf + idx, 40, s->drive_model_str); 786 idx += 40; 787 padstr8(buf + idx, 20, s->drive_serial_str); 788 idx += 20; 789 790 /* Entry 3: WWN */ 791 if (s->wwn && (idx + 12 <= max_len)) { 792 /* 4 byte header + 8 byte wwn */ 793 buf[idx++] = 0x01; /* Binary */ 794 buf[idx++] = 0x03; /* NAA */ 795 buf[idx++] = 0x00; 796 buf[idx++] = 0x08; 797 stq_be_p(&buf[idx], s->wwn); 798 idx += 8; 799 } 800 break; 801 802 default: 803 /* SPC-3, revision 23 sec. 6.4 */ 804 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 805 ASC_INV_FIELD_IN_CMD_PACKET); 806 return; 807 } 808 } else { 809 preamble_len = 5; 810 size_idx = 4; 811 812 buf[0] = 0x05; /* CD-ROM */ 813 buf[1] = 0x80; /* removable */ 814 buf[2] = 0x00; /* ISO */ 815 buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */ 816 /* buf[size_idx] set below. */ 817 buf[5] = 0; /* reserved */ 818 buf[6] = 0; /* reserved */ 819 buf[7] = 0; /* reserved */ 820 padstr8(buf + 8, 8, "QEMU"); 821 padstr8(buf + 16, 16, "QEMU DVD-ROM"); 822 padstr8(buf + 32, 4, s->version); 823 idx = 36; 824 } 825 826 out: 827 buf[size_idx] = idx - preamble_len; 828 ide_atapi_cmd_reply(s, idx, max_len); 829 } 830 831 static void cmd_get_configuration(IDEState *s, uint8_t *buf) 832 { 833 uint32_t len; 834 uint8_t index = 0; 835 int max_len; 836 837 /* only feature 0 is supported */ 838 if (buf[2] != 0 || buf[3] != 0) { 839 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 840 ASC_INV_FIELD_IN_CMD_PACKET); 841 return; 842 } 843 844 /* XXX: could result in alignment problems in some architectures */ 845 max_len = ube16_to_cpu(buf + 7); 846 847 /* 848 * XXX: avoid overflow for io_buffer if max_len is bigger than 849 * the size of that buffer (dimensioned to max number of 850 * sectors to transfer at once) 851 * 852 * Only a problem if the feature/profiles grow. 853 */ 854 if (max_len > 512) { 855 /* XXX: assume 1 sector */ 856 max_len = 512; 857 } 858 859 memset(buf, 0, max_len); 860 /* 861 * the number of sectors from the media tells us which profile 862 * to use as current. 0 means there is no media 863 */ 864 if (media_is_dvd(s)) { 865 cpu_to_ube16(buf + 6, MMC_PROFILE_DVD_ROM); 866 } else if (media_is_cd(s)) { 867 cpu_to_ube16(buf + 6, MMC_PROFILE_CD_ROM); 868 } 869 870 buf[10] = 0x02 | 0x01; /* persistent and current */ 871 len = 12; /* headers: 8 + 4 */ 872 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_DVD_ROM); 873 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_CD_ROM); 874 cpu_to_ube32(buf, len - 4); /* data length */ 875 876 ide_atapi_cmd_reply(s, len, max_len); 877 } 878 879 static void cmd_mode_sense(IDEState *s, uint8_t *buf) 880 { 881 int action, code; 882 int max_len; 883 884 max_len = ube16_to_cpu(buf + 7); 885 action = buf[2] >> 6; 886 code = buf[2] & 0x3f; 887 888 switch(action) { 889 case 0: /* current values */ 890 switch(code) { 891 case MODE_PAGE_R_W_ERROR: /* error recovery */ 892 cpu_to_ube16(&buf[0], 16 - 2); 893 buf[2] = 0x70; 894 buf[3] = 0; 895 buf[4] = 0; 896 buf[5] = 0; 897 buf[6] = 0; 898 buf[7] = 0; 899 900 buf[8] = MODE_PAGE_R_W_ERROR; 901 buf[9] = 16 - 10; 902 buf[10] = 0x00; 903 buf[11] = 0x05; 904 buf[12] = 0x00; 905 buf[13] = 0x00; 906 buf[14] = 0x00; 907 buf[15] = 0x00; 908 ide_atapi_cmd_reply(s, 16, max_len); 909 break; 910 case MODE_PAGE_AUDIO_CTL: 911 cpu_to_ube16(&buf[0], 24 - 2); 912 buf[2] = 0x70; 913 buf[3] = 0; 914 buf[4] = 0; 915 buf[5] = 0; 916 buf[6] = 0; 917 buf[7] = 0; 918 919 buf[8] = MODE_PAGE_AUDIO_CTL; 920 buf[9] = 24 - 10; 921 /* Fill with CDROM audio volume */ 922 buf[17] = 0; 923 buf[19] = 0; 924 buf[21] = 0; 925 buf[23] = 0; 926 927 ide_atapi_cmd_reply(s, 24, max_len); 928 break; 929 case MODE_PAGE_CAPABILITIES: 930 cpu_to_ube16(&buf[0], 30 - 2); 931 buf[2] = 0x70; 932 buf[3] = 0; 933 buf[4] = 0; 934 buf[5] = 0; 935 buf[6] = 0; 936 buf[7] = 0; 937 938 buf[8] = MODE_PAGE_CAPABILITIES; 939 buf[9] = 30 - 10; 940 buf[10] = 0x3b; /* read CDR/CDRW/DVDROM/DVDR/DVDRAM */ 941 buf[11] = 0x00; 942 943 /* Claim PLAY_AUDIO capability (0x01) since some Linux 944 code checks for this to automount media. */ 945 buf[12] = 0x71; 946 buf[13] = 3 << 5; 947 buf[14] = (1 << 0) | (1 << 3) | (1 << 5); 948 if (s->tray_locked) { 949 buf[14] |= 1 << 1; 950 } 951 buf[15] = 0x00; /* No volume & mute control, no changer */ 952 cpu_to_ube16(&buf[16], 704); /* 4x read speed */ 953 buf[18] = 0; /* Two volume levels */ 954 buf[19] = 2; 955 cpu_to_ube16(&buf[20], 512); /* 512k buffer */ 956 cpu_to_ube16(&buf[22], 704); /* 4x read speed current */ 957 buf[24] = 0; 958 buf[25] = 0; 959 buf[26] = 0; 960 buf[27] = 0; 961 buf[28] = 0; 962 buf[29] = 0; 963 ide_atapi_cmd_reply(s, 30, max_len); 964 break; 965 default: 966 goto error_cmd; 967 } 968 break; 969 case 1: /* changeable values */ 970 goto error_cmd; 971 case 2: /* default values */ 972 goto error_cmd; 973 default: 974 case 3: /* saved values */ 975 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 976 ASC_SAVING_PARAMETERS_NOT_SUPPORTED); 977 break; 978 } 979 return; 980 981 error_cmd: 982 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET); 983 } 984 985 static void cmd_test_unit_ready(IDEState *s, uint8_t *buf) 986 { 987 /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we 988 * come here, we know that it's ready. */ 989 ide_atapi_cmd_ok(s); 990 } 991 992 static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf) 993 { 994 s->tray_locked = buf[4] & 1; 995 blk_lock_medium(s->blk, buf[4] & 1); 996 ide_atapi_cmd_ok(s); 997 } 998 999 static void cmd_read(IDEState *s, uint8_t* buf) 1000 { 1001 int nb_sectors, lba; 1002 1003 if (buf[0] == GPCMD_READ_10) { 1004 nb_sectors = ube16_to_cpu(buf + 7); 1005 } else { 1006 nb_sectors = ube32_to_cpu(buf + 6); 1007 } 1008 1009 lba = ube32_to_cpu(buf + 2); 1010 if (nb_sectors == 0) { 1011 ide_atapi_cmd_ok(s); 1012 return; 1013 } 1014 1015 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 1016 } 1017 1018 static void cmd_read_cd(IDEState *s, uint8_t* buf) 1019 { 1020 int nb_sectors, lba, transfer_request; 1021 1022 nb_sectors = (buf[6] << 16) | (buf[7] << 8) | buf[8]; 1023 lba = ube32_to_cpu(buf + 2); 1024 1025 if (nb_sectors == 0) { 1026 ide_atapi_cmd_ok(s); 1027 return; 1028 } 1029 1030 transfer_request = buf[9]; 1031 switch(transfer_request & 0xf8) { 1032 case 0x00: 1033 /* nothing */ 1034 ide_atapi_cmd_ok(s); 1035 break; 1036 case 0x10: 1037 /* normal read */ 1038 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 1039 break; 1040 case 0xf8: 1041 /* read all data */ 1042 ide_atapi_cmd_read(s, lba, nb_sectors, 2352); 1043 break; 1044 default: 1045 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1046 ASC_INV_FIELD_IN_CMD_PACKET); 1047 break; 1048 } 1049 } 1050 1051 static void cmd_seek(IDEState *s, uint8_t* buf) 1052 { 1053 unsigned int lba; 1054 uint64_t total_sectors = s->nb_sectors >> 2; 1055 1056 lba = ube32_to_cpu(buf + 2); 1057 if (lba >= total_sectors) { 1058 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR); 1059 return; 1060 } 1061 1062 ide_atapi_cmd_ok(s); 1063 } 1064 1065 static void cmd_start_stop_unit(IDEState *s, uint8_t* buf) 1066 { 1067 int sense; 1068 bool start = buf[4] & 1; 1069 bool loej = buf[4] & 2; /* load on start, eject on !start */ 1070 int pwrcnd = buf[4] & 0xf0; 1071 1072 if (pwrcnd) { 1073 /* eject/load only happens for power condition == 0 */ 1074 ide_atapi_cmd_ok(s); 1075 return; 1076 } 1077 1078 if (loej) { 1079 if (!start && !s->tray_open && s->tray_locked) { 1080 sense = blk_is_inserted(s->blk) 1081 ? NOT_READY : ILLEGAL_REQUEST; 1082 ide_atapi_cmd_error(s, sense, ASC_MEDIA_REMOVAL_PREVENTED); 1083 return; 1084 } 1085 1086 if (s->tray_open != !start) { 1087 blk_eject(s->blk, !start); 1088 s->tray_open = !start; 1089 } 1090 } 1091 1092 ide_atapi_cmd_ok(s); 1093 } 1094 1095 static void cmd_mechanism_status(IDEState *s, uint8_t* buf) 1096 { 1097 int max_len = ube16_to_cpu(buf + 8); 1098 1099 cpu_to_ube16(buf, 0); 1100 /* no current LBA */ 1101 buf[2] = 0; 1102 buf[3] = 0; 1103 buf[4] = 0; 1104 buf[5] = 1; 1105 cpu_to_ube16(buf + 6, 0); 1106 ide_atapi_cmd_reply(s, 8, max_len); 1107 } 1108 1109 static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf) 1110 { 1111 int format, msf, start_track, len; 1112 int max_len; 1113 uint64_t total_sectors = s->nb_sectors >> 2; 1114 1115 max_len = ube16_to_cpu(buf + 7); 1116 format = buf[9] >> 6; 1117 msf = (buf[1] >> 1) & 1; 1118 start_track = buf[6]; 1119 1120 switch(format) { 1121 case 0: 1122 len = cdrom_read_toc(total_sectors, buf, msf, start_track); 1123 if (len < 0) 1124 goto error_cmd; 1125 ide_atapi_cmd_reply(s, len, max_len); 1126 break; 1127 case 1: 1128 /* multi session : only a single session defined */ 1129 memset(buf, 0, 12); 1130 buf[1] = 0x0a; 1131 buf[2] = 0x01; 1132 buf[3] = 0x01; 1133 ide_atapi_cmd_reply(s, 12, max_len); 1134 break; 1135 case 2: 1136 len = cdrom_read_toc_raw(total_sectors, buf, msf, start_track); 1137 if (len < 0) 1138 goto error_cmd; 1139 ide_atapi_cmd_reply(s, len, max_len); 1140 break; 1141 default: 1142 error_cmd: 1143 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1144 ASC_INV_FIELD_IN_CMD_PACKET); 1145 } 1146 } 1147 1148 static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf) 1149 { 1150 uint64_t total_sectors = s->nb_sectors >> 2; 1151 1152 /* NOTE: it is really the number of sectors minus 1 */ 1153 cpu_to_ube32(buf, total_sectors - 1); 1154 cpu_to_ube32(buf + 4, 2048); 1155 ide_atapi_cmd_reply(s, 8, 8); 1156 } 1157 1158 static void cmd_read_disc_information(IDEState *s, uint8_t* buf) 1159 { 1160 uint8_t type = buf[1] & 7; 1161 uint32_t max_len = ube16_to_cpu(buf + 7); 1162 1163 /* Types 1/2 are only defined for Blu-Ray. */ 1164 if (type != 0) { 1165 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1166 ASC_INV_FIELD_IN_CMD_PACKET); 1167 return; 1168 } 1169 1170 memset(buf, 0, 34); 1171 buf[1] = 32; 1172 buf[2] = 0xe; /* last session complete, disc finalized */ 1173 buf[3] = 1; /* first track on disc */ 1174 buf[4] = 1; /* # of sessions */ 1175 buf[5] = 1; /* first track of last session */ 1176 buf[6] = 1; /* last track of last session */ 1177 buf[7] = 0x20; /* unrestricted use */ 1178 buf[8] = 0x00; /* CD-ROM or DVD-ROM */ 1179 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */ 1180 /* 12-23: not meaningful for CD-ROM or DVD-ROM */ 1181 /* 24-31: disc bar code */ 1182 /* 32: disc application code */ 1183 /* 33: number of OPC tables */ 1184 1185 ide_atapi_cmd_reply(s, 34, max_len); 1186 } 1187 1188 static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf) 1189 { 1190 int max_len; 1191 int media = buf[1]; 1192 int format = buf[7]; 1193 int ret; 1194 1195 max_len = ube16_to_cpu(buf + 8); 1196 1197 if (format < 0xff) { 1198 if (media_is_cd(s)) { 1199 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1200 ASC_INCOMPATIBLE_FORMAT); 1201 return; 1202 } else if (!media_present(s)) { 1203 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1204 ASC_INV_FIELD_IN_CMD_PACKET); 1205 return; 1206 } 1207 } 1208 1209 memset(buf, 0, max_len > IDE_DMA_BUF_SECTORS * 512 + 4 ? 1210 IDE_DMA_BUF_SECTORS * 512 + 4 : max_len); 1211 1212 switch (format) { 1213 case 0x00 ... 0x7f: 1214 case 0xff: 1215 if (media == 0) { 1216 ret = ide_dvd_read_structure(s, format, buf, buf); 1217 1218 if (ret < 0) { 1219 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, -ret); 1220 } else { 1221 ide_atapi_cmd_reply(s, ret, max_len); 1222 } 1223 1224 break; 1225 } 1226 /* TODO: BD support, fall through for now */ 1227 1228 /* Generic disk structures */ 1229 case 0x80: /* TODO: AACS volume identifier */ 1230 case 0x81: /* TODO: AACS media serial number */ 1231 case 0x82: /* TODO: AACS media identifier */ 1232 case 0x83: /* TODO: AACS media key block */ 1233 case 0x90: /* TODO: List of recognized format layers */ 1234 case 0xc0: /* TODO: Write protection status */ 1235 default: 1236 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1237 ASC_INV_FIELD_IN_CMD_PACKET); 1238 break; 1239 } 1240 } 1241 1242 static void cmd_set_speed(IDEState *s, uint8_t* buf) 1243 { 1244 ide_atapi_cmd_ok(s); 1245 } 1246 1247 enum { 1248 /* 1249 * Only commands flagged as ALLOW_UA are allowed to run under a 1250 * unit attention condition. (See MMC-5, section 4.1.6.1) 1251 */ 1252 ALLOW_UA = 0x01, 1253 1254 /* 1255 * Commands flagged with CHECK_READY can only execute if a medium is present. 1256 * Otherwise they report the Not Ready Condition. (See MMC-5, section 1257 * 4.1.8) 1258 */ 1259 CHECK_READY = 0x02, 1260 1261 /* 1262 * Commands flagged with NONDATA do not in any circumstances return 1263 * any data via ide_atapi_cmd_reply. These commands are exempt from 1264 * the normal byte_count_limit constraints. 1265 * See ATA8-ACS3 "7.21.5 Byte Count Limit" 1266 */ 1267 NONDATA = 0x04, 1268 }; 1269 1270 static const struct AtapiCmd { 1271 void (*handler)(IDEState *s, uint8_t *buf); 1272 int flags; 1273 } atapi_cmd_table[0x100] = { 1274 [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY | NONDATA }, 1275 [ 0x03 ] = { cmd_request_sense, ALLOW_UA }, 1276 [ 0x12 ] = { cmd_inquiry, ALLOW_UA }, 1277 [ 0x1b ] = { cmd_start_stop_unit, NONDATA }, /* [1] */ 1278 [ 0x1e ] = { cmd_prevent_allow_medium_removal, NONDATA }, 1279 [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY }, 1280 [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY }, 1281 [ 0x2b ] = { cmd_seek, CHECK_READY | NONDATA }, 1282 [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY }, 1283 [ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, 1284 [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, 1285 [ 0x51 ] = { cmd_read_disc_information, CHECK_READY }, 1286 [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, 1287 [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY }, 1288 [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY }, 1289 [ 0xbb ] = { cmd_set_speed, NONDATA }, 1290 [ 0xbd ] = { cmd_mechanism_status, 0 }, 1291 [ 0xbe ] = { cmd_read_cd, CHECK_READY }, 1292 /* [1] handler detects and reports not ready condition itself */ 1293 }; 1294 1295 void ide_atapi_cmd(IDEState *s) 1296 { 1297 uint8_t *buf = s->io_buffer; 1298 const struct AtapiCmd *cmd = &atapi_cmd_table[s->io_buffer[0]]; 1299 1300 #ifdef DEBUG_IDE_ATAPI 1301 { 1302 int i; 1303 printf("ATAPI limit=0x%x packet:", s->lcyl | (s->hcyl << 8)); 1304 for(i = 0; i < ATAPI_PACKET_SIZE; i++) { 1305 printf(" %02x", buf[i]); 1306 } 1307 printf("\n"); 1308 } 1309 #endif 1310 1311 /* 1312 * If there's a UNIT_ATTENTION condition pending, only command flagged with 1313 * ALLOW_UA are allowed to complete. with other commands getting a CHECK 1314 * condition response unless a higher priority status, defined by the drive 1315 * here, is pending. 1316 */ 1317 if (s->sense_key == UNIT_ATTENTION && !(cmd->flags & ALLOW_UA)) { 1318 ide_atapi_cmd_check_status(s); 1319 return; 1320 } 1321 /* 1322 * When a CD gets changed, we have to report an ejected state and 1323 * then a loaded state to guests so that they detect tray 1324 * open/close and media change events. Guests that do not use 1325 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close 1326 * states rely on this behavior. 1327 */ 1328 if (!(cmd->flags & ALLOW_UA) && 1329 !s->tray_open && blk_is_inserted(s->blk) && s->cdrom_changed) { 1330 1331 if (s->cdrom_changed == 1) { 1332 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1333 s->cdrom_changed = 2; 1334 } else { 1335 ide_atapi_cmd_error(s, UNIT_ATTENTION, ASC_MEDIUM_MAY_HAVE_CHANGED); 1336 s->cdrom_changed = 0; 1337 } 1338 1339 return; 1340 } 1341 1342 /* Report a Not Ready condition if appropriate for the command */ 1343 if ((cmd->flags & CHECK_READY) && 1344 (!media_present(s) || !blk_is_inserted(s->blk))) 1345 { 1346 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1347 return; 1348 } 1349 1350 /* Nondata commands permit the byte_count_limit to be 0. 1351 * If this is a data-transferring PIO command and BCL is 0, 1352 * we abort at the /ATA/ level, not the ATAPI level. 1353 * See ATA8 ACS3 section 7.17.6.49 and 7.21.5 */ 1354 if (cmd->handler && !(cmd->flags & NONDATA)) { 1355 /* TODO: Check IDENTIFY data word 125 for default BCL (currently 0) */ 1356 if (!(atapi_byte_count_limit(s) || s->atapi_dma)) { 1357 /* TODO: Move abort back into core.c and make static inline again */ 1358 ide_abort_command(s); 1359 return; 1360 } 1361 } 1362 1363 /* Execute the command */ 1364 if (cmd->handler) { 1365 cmd->handler(s, buf); 1366 return; 1367 } 1368 1369 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE); 1370 } 1371