atapi.c (42640B)
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 #include "trace.h" 31 32 #define ATAPI_SECTOR_BITS (2 + BDRV_SECTOR_BITS) 33 #define ATAPI_SECTOR_SIZE (1 << ATAPI_SECTOR_BITS) 34 35 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret); 36 37 static void padstr8(uint8_t *buf, int buf_size, const char *src) 38 { 39 int i; 40 for(i = 0; i < buf_size; i++) { 41 if (*src) 42 buf[i] = *src++; 43 else 44 buf[i] = ' '; 45 } 46 } 47 48 static void lba_to_msf(uint8_t *buf, int lba) 49 { 50 lba += 150; 51 buf[0] = (lba / 75) / 60; 52 buf[1] = (lba / 75) % 60; 53 buf[2] = lba % 75; 54 } 55 56 static inline int media_present(IDEState *s) 57 { 58 return !s->tray_open && s->nb_sectors > 0; 59 } 60 61 /* XXX: DVDs that could fit on a CD will be reported as a CD */ 62 static inline int media_is_dvd(IDEState *s) 63 { 64 return (media_present(s) && s->nb_sectors > CD_MAX_SECTORS); 65 } 66 67 static inline int media_is_cd(IDEState *s) 68 { 69 return (media_present(s) && s->nb_sectors <= CD_MAX_SECTORS); 70 } 71 72 static void cd_data_to_raw(uint8_t *buf, int lba) 73 { 74 /* sync bytes */ 75 buf[0] = 0x00; 76 memset(buf + 1, 0xff, 10); 77 buf[11] = 0x00; 78 buf += 12; 79 /* MSF */ 80 lba_to_msf(buf, lba); 81 buf[3] = 0x01; /* mode 1 data */ 82 buf += 4; 83 /* data */ 84 buf += 2048; 85 /* XXX: ECC not computed */ 86 memset(buf, 0, 288); 87 } 88 89 static int 90 cd_read_sector_sync(IDEState *s) 91 { 92 int ret; 93 block_acct_start(blk_get_stats(s->blk), &s->acct, 94 ATAPI_SECTOR_SIZE, BLOCK_ACCT_READ); 95 96 trace_cd_read_sector_sync(s->lba); 97 98 switch (s->cd_sector_size) { 99 case 2048: 100 ret = blk_pread(s->blk, (int64_t)s->lba << ATAPI_SECTOR_BITS, 101 ATAPI_SECTOR_SIZE, s->io_buffer, 0); 102 break; 103 case 2352: 104 ret = blk_pread(s->blk, (int64_t)s->lba << ATAPI_SECTOR_BITS, 105 ATAPI_SECTOR_SIZE, s->io_buffer + 16, 0); 106 if (ret >= 0) { 107 cd_data_to_raw(s->io_buffer, s->lba); 108 } 109 break; 110 default: 111 block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ); 112 return -EIO; 113 } 114 115 if (ret < 0) { 116 block_acct_failed(blk_get_stats(s->blk), &s->acct); 117 } else { 118 block_acct_done(blk_get_stats(s->blk), &s->acct); 119 s->lba++; 120 s->io_buffer_index = 0; 121 } 122 123 return ret; 124 } 125 126 static void cd_read_sector_cb(void *opaque, int ret) 127 { 128 IDEState *s = opaque; 129 130 trace_cd_read_sector_cb(s->lba, ret); 131 132 if (ret < 0) { 133 block_acct_failed(blk_get_stats(s->blk), &s->acct); 134 ide_atapi_io_error(s, ret); 135 return; 136 } 137 138 block_acct_done(blk_get_stats(s->blk), &s->acct); 139 140 if (s->cd_sector_size == 2352) { 141 cd_data_to_raw(s->io_buffer, s->lba); 142 } 143 144 s->lba++; 145 s->io_buffer_index = 0; 146 s->status &= ~BUSY_STAT; 147 148 ide_atapi_cmd_reply_end(s); 149 } 150 151 static int cd_read_sector(IDEState *s) 152 { 153 void *buf; 154 155 if (s->cd_sector_size != 2048 && s->cd_sector_size != 2352) { 156 block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ); 157 return -EINVAL; 158 } 159 160 buf = (s->cd_sector_size == 2352) ? s->io_buffer + 16 : s->io_buffer; 161 qemu_iovec_init_buf(&s->qiov, buf, ATAPI_SECTOR_SIZE); 162 163 trace_cd_read_sector(s->lba); 164 165 block_acct_start(blk_get_stats(s->blk), &s->acct, 166 ATAPI_SECTOR_SIZE, BLOCK_ACCT_READ); 167 168 ide_buffered_readv(s, (int64_t)s->lba << 2, &s->qiov, 4, 169 cd_read_sector_cb, s); 170 171 s->status |= BUSY_STAT; 172 return 0; 173 } 174 175 void ide_atapi_cmd_ok(IDEState *s) 176 { 177 s->error = 0; 178 s->status = READY_STAT | SEEK_STAT; 179 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 180 ide_transfer_stop(s); 181 ide_set_irq(s->bus); 182 } 183 184 void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc) 185 { 186 trace_ide_atapi_cmd_error(s, sense_key, asc); 187 s->error = sense_key << 4; 188 s->status = READY_STAT | ERR_STAT; 189 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 190 s->sense_key = sense_key; 191 s->asc = asc; 192 ide_transfer_stop(s); 193 ide_set_irq(s->bus); 194 } 195 196 void ide_atapi_io_error(IDEState *s, int ret) 197 { 198 /* XXX: handle more errors */ 199 if (ret == -ENOMEDIUM) { 200 ide_atapi_cmd_error(s, NOT_READY, 201 ASC_MEDIUM_NOT_PRESENT); 202 } else { 203 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 204 ASC_LOGICAL_BLOCK_OOR); 205 } 206 } 207 208 static uint16_t atapi_byte_count_limit(IDEState *s) 209 { 210 uint16_t bcl; 211 212 bcl = s->lcyl | (s->hcyl << 8); 213 if (bcl == 0xffff) { 214 return 0xfffe; 215 } 216 return bcl; 217 } 218 219 /* The whole ATAPI transfer logic is handled in this function */ 220 void ide_atapi_cmd_reply_end(IDEState *s) 221 { 222 int byte_count_limit, size, ret; 223 while (s->packet_transfer_size > 0) { 224 trace_ide_atapi_cmd_reply_end(s, s->packet_transfer_size, 225 s->elementary_transfer_size, 226 s->io_buffer_index); 227 228 /* see if a new sector must be read */ 229 if (s->lba != -1 && s->io_buffer_index >= s->cd_sector_size) { 230 if (!s->elementary_transfer_size) { 231 ret = cd_read_sector(s); 232 if (ret < 0) { 233 ide_atapi_io_error(s, ret); 234 } 235 return; 236 } else { 237 /* rebuffering within an elementary transfer is 238 * only possible with a sync request because we 239 * end up with a race condition otherwise */ 240 ret = cd_read_sector_sync(s); 241 if (ret < 0) { 242 ide_atapi_io_error(s, ret); 243 return; 244 } 245 } 246 } 247 if (s->elementary_transfer_size > 0) { 248 /* there are some data left to transmit in this elementary 249 transfer */ 250 size = s->cd_sector_size - s->io_buffer_index; 251 if (size > s->elementary_transfer_size) 252 size = s->elementary_transfer_size; 253 } else { 254 /* a new transfer is needed */ 255 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO; 256 ide_set_irq(s->bus); 257 byte_count_limit = atapi_byte_count_limit(s); 258 trace_ide_atapi_cmd_reply_end_bcl(s, byte_count_limit); 259 size = s->packet_transfer_size; 260 if (size > byte_count_limit) { 261 /* byte count limit must be even if this case */ 262 if (byte_count_limit & 1) 263 byte_count_limit--; 264 size = byte_count_limit; 265 } 266 s->lcyl = size; 267 s->hcyl = size >> 8; 268 s->elementary_transfer_size = size; 269 /* we cannot transmit more than one sector at a time */ 270 if (s->lba != -1) { 271 if (size > (s->cd_sector_size - s->io_buffer_index)) 272 size = (s->cd_sector_size - s->io_buffer_index); 273 } 274 trace_ide_atapi_cmd_reply_end_new(s, s->status); 275 } 276 s->packet_transfer_size -= size; 277 s->elementary_transfer_size -= size; 278 s->io_buffer_index += size; 279 assert(size <= s->io_buffer_total_len); 280 assert(s->io_buffer_index <= s->io_buffer_total_len); 281 282 /* Some adapters process PIO data right away. In that case, we need 283 * to avoid mutual recursion between ide_transfer_start 284 * and ide_atapi_cmd_reply_end. 285 */ 286 if (!ide_transfer_start_norecurse(s, 287 s->io_buffer + s->io_buffer_index - size, 288 size, ide_atapi_cmd_reply_end)) { 289 return; 290 } 291 } 292 293 /* end of transfer */ 294 trace_ide_atapi_cmd_reply_end_eot(s, s->status); 295 ide_atapi_cmd_ok(s); 296 ide_set_irq(s->bus); 297 } 298 299 /* send a reply of 'size' bytes in s->io_buffer to an ATAPI command */ 300 static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size) 301 { 302 if (size > max_size) 303 size = max_size; 304 s->lba = -1; /* no sector read */ 305 s->packet_transfer_size = size; 306 s->io_buffer_size = size; /* dma: send the reply data as one chunk */ 307 s->elementary_transfer_size = 0; 308 309 if (s->atapi_dma) { 310 block_acct_start(blk_get_stats(s->blk), &s->acct, size, 311 BLOCK_ACCT_READ); 312 s->status = READY_STAT | SEEK_STAT | DRQ_STAT; 313 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 314 } else { 315 s->status = READY_STAT | SEEK_STAT; 316 s->io_buffer_index = 0; 317 ide_atapi_cmd_reply_end(s); 318 } 319 } 320 321 /* start a CD-ROM read command */ 322 static void ide_atapi_cmd_read_pio(IDEState *s, int lba, int nb_sectors, 323 int sector_size) 324 { 325 assert(0 <= lba && lba < (s->nb_sectors >> 2)); 326 327 s->lba = lba; 328 s->packet_transfer_size = nb_sectors * sector_size; 329 s->elementary_transfer_size = 0; 330 s->io_buffer_index = sector_size; 331 s->cd_sector_size = sector_size; 332 333 ide_atapi_cmd_reply_end(s); 334 } 335 336 static void ide_atapi_cmd_check_status(IDEState *s) 337 { 338 trace_ide_atapi_cmd_check_status(s); 339 s->error = MC_ERR | (UNIT_ATTENTION << 4); 340 s->status = ERR_STAT; 341 s->nsector = 0; 342 ide_set_irq(s->bus); 343 } 344 /* ATAPI DMA support */ 345 346 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret) 347 { 348 IDEState *s = opaque; 349 int data_offset, n; 350 351 if (ret < 0) { 352 if (ide_handle_rw_error(s, -ret, ide_dma_cmd_to_retry(s->dma_cmd))) { 353 if (s->bus->error_status) { 354 s->bus->dma->aiocb = NULL; 355 return; 356 } 357 goto eot; 358 } 359 } 360 361 if (s->io_buffer_size > 0) { 362 /* 363 * For a cdrom read sector command (s->lba != -1), 364 * adjust the lba for the next s->io_buffer_size chunk 365 * and dma the current chunk. 366 * For a command != read (s->lba == -1), just transfer 367 * the reply data. 368 */ 369 if (s->lba != -1) { 370 if (s->cd_sector_size == 2352) { 371 n = 1; 372 cd_data_to_raw(s->io_buffer, s->lba); 373 } else { 374 n = s->io_buffer_size >> 11; 375 } 376 s->lba += n; 377 } 378 s->packet_transfer_size -= s->io_buffer_size; 379 if (s->bus->dma->ops->rw_buf(s->bus->dma, 1) == 0) 380 goto eot; 381 } 382 383 if (s->packet_transfer_size <= 0) { 384 s->status = READY_STAT | SEEK_STAT; 385 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 386 ide_set_irq(s->bus); 387 goto eot; 388 } 389 390 s->io_buffer_index = 0; 391 if (s->cd_sector_size == 2352) { 392 n = 1; 393 s->io_buffer_size = s->cd_sector_size; 394 data_offset = 16; 395 } else { 396 n = s->packet_transfer_size >> 11; 397 if (n > (IDE_DMA_BUF_SECTORS / 4)) 398 n = (IDE_DMA_BUF_SECTORS / 4); 399 s->io_buffer_size = n * 2048; 400 data_offset = 0; 401 } 402 trace_ide_atapi_cmd_read_dma_cb_aio(s, s->lba, n); 403 qemu_iovec_init_buf(&s->bus->dma->qiov, s->io_buffer + data_offset, 404 n * ATAPI_SECTOR_SIZE); 405 406 s->bus->dma->aiocb = ide_buffered_readv(s, (int64_t)s->lba << 2, 407 &s->bus->dma->qiov, n * 4, 408 ide_atapi_cmd_read_dma_cb, s); 409 return; 410 411 eot: 412 if (ret < 0) { 413 block_acct_failed(blk_get_stats(s->blk), &s->acct); 414 } else { 415 block_acct_done(blk_get_stats(s->blk), &s->acct); 416 } 417 ide_set_inactive(s, false); 418 } 419 420 /* start a CD-ROM read command with DMA */ 421 /* XXX: test if DMA is available */ 422 static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors, 423 int sector_size) 424 { 425 assert(0 <= lba && lba < (s->nb_sectors >> 2)); 426 427 s->lba = lba; 428 s->packet_transfer_size = nb_sectors * sector_size; 429 s->io_buffer_size = 0; 430 s->cd_sector_size = sector_size; 431 432 block_acct_start(blk_get_stats(s->blk), &s->acct, s->packet_transfer_size, 433 BLOCK_ACCT_READ); 434 435 /* XXX: check if BUSY_STAT should be set */ 436 s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT; 437 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 438 } 439 440 static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors, 441 int sector_size) 442 { 443 trace_ide_atapi_cmd_read(s, s->atapi_dma ? "dma" : "pio", 444 lba, nb_sectors); 445 if (s->atapi_dma) { 446 ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size); 447 } else { 448 ide_atapi_cmd_read_pio(s, lba, nb_sectors, sector_size); 449 } 450 } 451 452 void ide_atapi_dma_restart(IDEState *s) 453 { 454 /* 455 * At this point we can just re-evaluate the packet command and start over. 456 * The presence of ->dma_cb callback in the pre_save ensures that the packet 457 * command has been completely sent and we can safely restart command. 458 */ 459 s->unit = s->bus->retry_unit; 460 s->bus->dma->ops->restart_dma(s->bus->dma); 461 ide_atapi_cmd(s); 462 } 463 464 static inline uint8_t ide_atapi_set_profile(uint8_t *buf, uint8_t *index, 465 uint16_t profile) 466 { 467 uint8_t *buf_profile = buf + 12; /* start of profiles */ 468 469 buf_profile += ((*index) * 4); /* start of indexed profile */ 470 stw_be_p(buf_profile, profile); 471 buf_profile[2] = ((buf_profile[0] == buf[6]) && (buf_profile[1] == buf[7])); 472 473 /* each profile adds 4 bytes to the response */ 474 (*index)++; 475 buf[11] += 4; /* Additional Length */ 476 477 return 4; 478 } 479 480 static int ide_dvd_read_structure(IDEState *s, int format, 481 const uint8_t *packet, uint8_t *buf) 482 { 483 switch (format) { 484 case 0x0: /* Physical format information */ 485 { 486 int layer = packet[6]; 487 uint64_t total_sectors; 488 489 if (layer != 0) 490 return -ASC_INV_FIELD_IN_CMD_PACKET; 491 492 total_sectors = s->nb_sectors >> 2; 493 if (total_sectors == 0) { 494 return -ASC_MEDIUM_NOT_PRESENT; 495 } 496 497 buf[4] = 1; /* DVD-ROM, part version 1 */ 498 buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ 499 buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ 500 buf[7] = 0; /* default densities */ 501 502 /* FIXME: 0x30000 per spec? */ 503 stl_be_p(buf + 8, 0); /* start sector */ 504 stl_be_p(buf + 12, total_sectors - 1); /* end sector */ 505 stl_be_p(buf + 16, total_sectors - 1); /* l0 end sector */ 506 507 /* Size of buffer, not including 2 byte size field */ 508 stw_be_p(buf, 2048 + 2); 509 510 /* 2k data + 4 byte header */ 511 return (2048 + 4); 512 } 513 514 case 0x01: /* DVD copyright information */ 515 buf[4] = 0; /* no copyright data */ 516 buf[5] = 0; /* no region restrictions */ 517 518 /* Size of buffer, not including 2 byte size field */ 519 stw_be_p(buf, 4 + 2); 520 521 /* 4 byte header + 4 byte data */ 522 return (4 + 4); 523 524 case 0x03: /* BCA information - invalid field for no BCA info */ 525 return -ASC_INV_FIELD_IN_CMD_PACKET; 526 527 case 0x04: /* DVD disc manufacturing information */ 528 /* Size of buffer, not including 2 byte size field */ 529 stw_be_p(buf, 2048 + 2); 530 531 /* 2k data + 4 byte header */ 532 return (2048 + 4); 533 534 case 0xff: 535 /* 536 * This lists all the command capabilities above. Add new ones 537 * in order and update the length and buffer return values. 538 */ 539 540 buf[4] = 0x00; /* Physical format */ 541 buf[5] = 0x40; /* Not writable, is readable */ 542 stw_be_p(buf + 6, 2048 + 4); 543 544 buf[8] = 0x01; /* Copyright info */ 545 buf[9] = 0x40; /* Not writable, is readable */ 546 stw_be_p(buf + 10, 4 + 4); 547 548 buf[12] = 0x03; /* BCA info */ 549 buf[13] = 0x40; /* Not writable, is readable */ 550 stw_be_p(buf + 14, 188 + 4); 551 552 buf[16] = 0x04; /* Manufacturing info */ 553 buf[17] = 0x40; /* Not writable, is readable */ 554 stw_be_p(buf + 18, 2048 + 4); 555 556 /* Size of buffer, not including 2 byte size field */ 557 stw_be_p(buf, 16 + 2); 558 559 /* data written + 4 byte header */ 560 return (16 + 4); 561 562 default: /* TODO: formats beyond DVD-ROM requires */ 563 return -ASC_INV_FIELD_IN_CMD_PACKET; 564 } 565 } 566 567 static unsigned int event_status_media(IDEState *s, 568 uint8_t *buf) 569 { 570 uint8_t event_code, media_status; 571 572 media_status = 0; 573 if (s->tray_open) { 574 media_status = MS_TRAY_OPEN; 575 } else if (blk_is_inserted(s->blk)) { 576 media_status = MS_MEDIA_PRESENT; 577 } 578 579 /* Event notification descriptor */ 580 event_code = MEC_NO_CHANGE; 581 if (media_status != MS_TRAY_OPEN) { 582 if (s->events.new_media) { 583 event_code = MEC_NEW_MEDIA; 584 s->events.new_media = false; 585 } else if (s->events.eject_request) { 586 event_code = MEC_EJECT_REQUESTED; 587 s->events.eject_request = false; 588 } 589 } 590 591 buf[4] = event_code; 592 buf[5] = media_status; 593 594 /* These fields are reserved, just clear them. */ 595 buf[6] = 0; 596 buf[7] = 0; 597 598 return 8; /* We wrote to 4 extra bytes from the header */ 599 } 600 601 /* 602 * Before transferring data or otherwise signalling acceptance of a command 603 * marked CONDDATA, we must check the validity of the byte_count_limit. 604 */ 605 static bool validate_bcl(IDEState *s) 606 { 607 /* TODO: Check IDENTIFY data word 125 for defacult BCL (currently 0) */ 608 if (s->atapi_dma || atapi_byte_count_limit(s)) { 609 return true; 610 } 611 612 /* TODO: Move abort back into core.c and introduce proper error flow between 613 * ATAPI layer and IDE core layer */ 614 ide_abort_command(s); 615 return false; 616 } 617 618 static void cmd_get_event_status_notification(IDEState *s, 619 uint8_t *buf) 620 { 621 const uint8_t *packet = buf; 622 623 struct { 624 uint8_t opcode; 625 uint8_t polled; /* lsb bit is polled; others are reserved */ 626 uint8_t reserved2[2]; 627 uint8_t class; 628 uint8_t reserved3[2]; 629 uint16_t len; 630 uint8_t control; 631 } QEMU_PACKED *gesn_cdb; 632 633 struct { 634 uint16_t len; 635 uint8_t notification_class; 636 uint8_t supported_events; 637 } QEMU_PACKED *gesn_event_header; 638 unsigned int max_len, used_len; 639 640 gesn_cdb = (void *)packet; 641 gesn_event_header = (void *)buf; 642 643 max_len = be16_to_cpu(gesn_cdb->len); 644 645 /* It is fine by the MMC spec to not support async mode operations */ 646 if (!(gesn_cdb->polled & 0x01)) { /* asynchronous mode */ 647 /* Only polling is supported, asynchronous mode is not. */ 648 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 649 ASC_INV_FIELD_IN_CMD_PACKET); 650 return; 651 } 652 653 /* polling mode operation */ 654 655 /* 656 * These are the supported events. 657 * 658 * We currently only support requests of the 'media' type. 659 * Notification class requests and supported event classes are bitmasks, 660 * but they are build from the same values as the "notification class" 661 * field. 662 */ 663 gesn_event_header->supported_events = 1 << GESN_MEDIA; 664 665 /* 666 * We use |= below to set the class field; other bits in this byte 667 * are reserved now but this is useful to do if we have to use the 668 * reserved fields later. 669 */ 670 gesn_event_header->notification_class = 0; 671 672 /* 673 * Responses to requests are to be based on request priority. The 674 * notification_class_request_type enum above specifies the 675 * priority: upper elements are higher prio than lower ones. 676 */ 677 if (gesn_cdb->class & (1 << GESN_MEDIA)) { 678 gesn_event_header->notification_class |= GESN_MEDIA; 679 used_len = event_status_media(s, buf); 680 } else { 681 gesn_event_header->notification_class = 0x80; /* No event available */ 682 used_len = sizeof(*gesn_event_header); 683 } 684 gesn_event_header->len = cpu_to_be16(used_len 685 - sizeof(*gesn_event_header)); 686 ide_atapi_cmd_reply(s, used_len, max_len); 687 } 688 689 static void cmd_request_sense(IDEState *s, uint8_t *buf) 690 { 691 int max_len = buf[4]; 692 693 memset(buf, 0, 18); 694 buf[0] = 0x70 | (1 << 7); 695 buf[2] = s->sense_key; 696 buf[7] = 10; 697 buf[12] = s->asc; 698 699 if (s->sense_key == UNIT_ATTENTION) { 700 s->sense_key = NO_SENSE; 701 } 702 703 ide_atapi_cmd_reply(s, 18, max_len); 704 } 705 706 static void cmd_inquiry(IDEState *s, uint8_t *buf) 707 { 708 uint8_t page_code = buf[2]; 709 int max_len = buf[4]; 710 711 unsigned idx = 0; 712 unsigned size_idx; 713 unsigned preamble_len; 714 715 /* If the EVPD (Enable Vital Product Data) bit is set in byte 1, 716 * we are being asked for a specific page of info indicated by byte 2. */ 717 if (buf[1] & 0x01) { 718 preamble_len = 4; 719 size_idx = 3; 720 721 buf[idx++] = 0x05; /* CD-ROM */ 722 buf[idx++] = page_code; /* Page Code */ 723 buf[idx++] = 0x00; /* reserved */ 724 idx++; /* length (set later) */ 725 726 switch (page_code) { 727 case 0x00: 728 /* Supported Pages: List of supported VPD responses. */ 729 buf[idx++] = 0x00; /* 0x00: Supported Pages, and: */ 730 buf[idx++] = 0x83; /* 0x83: Device Identification. */ 731 break; 732 733 case 0x83: 734 /* Device Identification. Each entry is optional, but the entries 735 * included here are modeled after libata's VPD responses. 736 * If the response is given, at least one entry must be present. */ 737 738 /* Entry 1: Serial */ 739 if (idx + 24 > max_len) { 740 /* Not enough room for even the first entry: */ 741 /* 4 byte header + 20 byte string */ 742 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 743 ASC_DATA_PHASE_ERROR); 744 return; 745 } 746 buf[idx++] = 0x02; /* Ascii */ 747 buf[idx++] = 0x00; /* Vendor Specific */ 748 buf[idx++] = 0x00; 749 buf[idx++] = 20; /* Remaining length */ 750 padstr8(buf + idx, 20, s->drive_serial_str); 751 idx += 20; 752 753 /* Entry 2: Drive Model and Serial */ 754 if (idx + 72 > max_len) { 755 /* 4 (header) + 8 (vendor) + 60 (model & serial) */ 756 goto out; 757 } 758 buf[idx++] = 0x02; /* Ascii */ 759 buf[idx++] = 0x01; /* T10 Vendor */ 760 buf[idx++] = 0x00; 761 buf[idx++] = 68; 762 padstr8(buf + idx, 8, "ATA"); /* Generic T10 vendor */ 763 idx += 8; 764 padstr8(buf + idx, 40, s->drive_model_str); 765 idx += 40; 766 padstr8(buf + idx, 20, s->drive_serial_str); 767 idx += 20; 768 769 /* Entry 3: WWN */ 770 if (s->wwn && (idx + 12 <= max_len)) { 771 /* 4 byte header + 8 byte wwn */ 772 buf[idx++] = 0x01; /* Binary */ 773 buf[idx++] = 0x03; /* NAA */ 774 buf[idx++] = 0x00; 775 buf[idx++] = 0x08; 776 stq_be_p(&buf[idx], s->wwn); 777 idx += 8; 778 } 779 break; 780 781 default: 782 /* SPC-3, revision 23 sec. 6.4 */ 783 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 784 ASC_INV_FIELD_IN_CMD_PACKET); 785 return; 786 } 787 } else { 788 preamble_len = 5; 789 size_idx = 4; 790 791 buf[0] = 0x05; /* CD-ROM */ 792 buf[1] = 0x80; /* removable */ 793 buf[2] = 0x00; /* ISO */ 794 buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */ 795 /* buf[size_idx] set below. */ 796 buf[5] = 0; /* reserved */ 797 buf[6] = 0; /* reserved */ 798 buf[7] = 0; /* reserved */ 799 padstr8(buf + 8, 8, "QEMU"); 800 padstr8(buf + 16, 16, "QEMU DVD-ROM"); 801 padstr8(buf + 32, 4, s->version); 802 idx = 36; 803 } 804 805 out: 806 buf[size_idx] = idx - preamble_len; 807 ide_atapi_cmd_reply(s, idx, max_len); 808 } 809 810 static void cmd_get_configuration(IDEState *s, uint8_t *buf) 811 { 812 uint32_t len; 813 uint8_t index = 0; 814 int max_len; 815 816 /* only feature 0 is supported */ 817 if (buf[2] != 0 || buf[3] != 0) { 818 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 819 ASC_INV_FIELD_IN_CMD_PACKET); 820 return; 821 } 822 823 /* XXX: could result in alignment problems in some architectures */ 824 max_len = lduw_be_p(buf + 7); 825 826 /* 827 * XXX: avoid overflow for io_buffer if max_len is bigger than 828 * the size of that buffer (dimensioned to max number of 829 * sectors to transfer at once) 830 * 831 * Only a problem if the feature/profiles grow. 832 */ 833 if (max_len > BDRV_SECTOR_SIZE) { 834 /* XXX: assume 1 sector */ 835 max_len = BDRV_SECTOR_SIZE; 836 } 837 838 memset(buf, 0, max_len); 839 /* 840 * the number of sectors from the media tells us which profile 841 * to use as current. 0 means there is no media 842 */ 843 if (media_is_dvd(s)) { 844 stw_be_p(buf + 6, MMC_PROFILE_DVD_ROM); 845 } else if (media_is_cd(s)) { 846 stw_be_p(buf + 6, MMC_PROFILE_CD_ROM); 847 } 848 849 buf[10] = 0x02 | 0x01; /* persistent and current */ 850 len = 12; /* headers: 8 + 4 */ 851 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_DVD_ROM); 852 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_CD_ROM); 853 stl_be_p(buf, len - 4); /* data length */ 854 855 ide_atapi_cmd_reply(s, len, max_len); 856 } 857 858 static void cmd_mode_sense(IDEState *s, uint8_t *buf) 859 { 860 int action, code; 861 int max_len; 862 863 max_len = lduw_be_p(buf + 7); 864 action = buf[2] >> 6; 865 code = buf[2] & 0x3f; 866 867 switch(action) { 868 case 0: /* current values */ 869 switch(code) { 870 case MODE_PAGE_R_W_ERROR: /* error recovery */ 871 stw_be_p(&buf[0], 16 - 2); 872 buf[2] = 0x70; 873 buf[3] = 0; 874 buf[4] = 0; 875 buf[5] = 0; 876 buf[6] = 0; 877 buf[7] = 0; 878 879 buf[8] = MODE_PAGE_R_W_ERROR; 880 buf[9] = 16 - 10; 881 buf[10] = 0x00; 882 buf[11] = 0x05; 883 buf[12] = 0x00; 884 buf[13] = 0x00; 885 buf[14] = 0x00; 886 buf[15] = 0x00; 887 ide_atapi_cmd_reply(s, 16, max_len); 888 break; 889 case MODE_PAGE_AUDIO_CTL: 890 stw_be_p(&buf[0], 24 - 2); 891 buf[2] = 0x70; 892 buf[3] = 0; 893 buf[4] = 0; 894 buf[5] = 0; 895 buf[6] = 0; 896 buf[7] = 0; 897 898 buf[8] = MODE_PAGE_AUDIO_CTL; 899 buf[9] = 24 - 10; 900 /* Fill with CDROM audio volume */ 901 buf[17] = 0; 902 buf[19] = 0; 903 buf[21] = 0; 904 buf[23] = 0; 905 906 ide_atapi_cmd_reply(s, 24, max_len); 907 break; 908 case MODE_PAGE_CAPABILITIES: 909 stw_be_p(&buf[0], 30 - 2); 910 buf[2] = 0x70; 911 buf[3] = 0; 912 buf[4] = 0; 913 buf[5] = 0; 914 buf[6] = 0; 915 buf[7] = 0; 916 917 buf[8] = MODE_PAGE_CAPABILITIES; 918 buf[9] = 30 - 10; 919 buf[10] = 0x3b; /* read CDR/CDRW/DVDROM/DVDR/DVDRAM */ 920 buf[11] = 0x00; 921 922 /* Claim PLAY_AUDIO capability (0x01) since some Linux 923 code checks for this to automount media. */ 924 buf[12] = 0x71; 925 buf[13] = 3 << 5; 926 buf[14] = (1 << 0) | (1 << 3) | (1 << 5); 927 if (s->tray_locked) { 928 buf[14] |= 1 << 1; 929 } 930 buf[15] = 0x00; /* No volume & mute control, no changer */ 931 stw_be_p(&buf[16], 704); /* 4x read speed */ 932 buf[18] = 0; /* Two volume levels */ 933 buf[19] = 2; 934 stw_be_p(&buf[20], 512); /* 512k buffer */ 935 stw_be_p(&buf[22], 704); /* 4x read speed current */ 936 buf[24] = 0; 937 buf[25] = 0; 938 buf[26] = 0; 939 buf[27] = 0; 940 buf[28] = 0; 941 buf[29] = 0; 942 ide_atapi_cmd_reply(s, 30, max_len); 943 break; 944 default: 945 goto error_cmd; 946 } 947 break; 948 case 1: /* changeable values */ 949 goto error_cmd; 950 case 2: /* default values */ 951 goto error_cmd; 952 default: 953 case 3: /* saved values */ 954 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 955 ASC_SAVING_PARAMETERS_NOT_SUPPORTED); 956 break; 957 } 958 return; 959 960 error_cmd: 961 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET); 962 } 963 964 static void cmd_test_unit_ready(IDEState *s, uint8_t *buf) 965 { 966 /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we 967 * come here, we know that it's ready. */ 968 ide_atapi_cmd_ok(s); 969 } 970 971 static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf) 972 { 973 s->tray_locked = buf[4] & 1; 974 blk_lock_medium(s->blk, buf[4] & 1); 975 ide_atapi_cmd_ok(s); 976 } 977 978 static void cmd_read(IDEState *s, uint8_t* buf) 979 { 980 unsigned int nb_sectors, lba; 981 982 /* Total logical sectors of ATAPI_SECTOR_SIZE(=2048) bytes */ 983 uint64_t total_sectors = s->nb_sectors >> 2; 984 985 if (buf[0] == GPCMD_READ_10) { 986 nb_sectors = lduw_be_p(buf + 7); 987 } else { 988 nb_sectors = ldl_be_p(buf + 6); 989 } 990 if (nb_sectors == 0) { 991 ide_atapi_cmd_ok(s); 992 return; 993 } 994 995 lba = ldl_be_p(buf + 2); 996 if (lba >= total_sectors || lba + nb_sectors - 1 >= total_sectors) { 997 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR); 998 return; 999 } 1000 1001 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 1002 } 1003 1004 static void cmd_read_cd(IDEState *s, uint8_t* buf) 1005 { 1006 unsigned int nb_sectors, lba, transfer_request; 1007 1008 /* Total logical sectors of ATAPI_SECTOR_SIZE(=2048) bytes */ 1009 uint64_t total_sectors = s->nb_sectors >> 2; 1010 1011 nb_sectors = (buf[6] << 16) | (buf[7] << 8) | buf[8]; 1012 if (nb_sectors == 0) { 1013 ide_atapi_cmd_ok(s); 1014 return; 1015 } 1016 1017 lba = ldl_be_p(buf + 2); 1018 if (lba >= total_sectors || lba + nb_sectors - 1 >= total_sectors) { 1019 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR); 1020 return; 1021 } 1022 1023 transfer_request = buf[9] & 0xf8; 1024 if (transfer_request == 0x00) { 1025 /* nothing */ 1026 ide_atapi_cmd_ok(s); 1027 return; 1028 } 1029 1030 /* Check validity of BCL before transferring data */ 1031 if (!validate_bcl(s)) { 1032 return; 1033 } 1034 1035 switch (transfer_request) { 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 = ldl_be_p(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 = lduw_be_p(buf + 8); 1098 1099 stw_be_p(buf, 0); 1100 /* no current LBA */ 1101 buf[2] = 0; 1102 buf[3] = 0; 1103 buf[4] = 0; 1104 buf[5] = 1; 1105 stw_be_p(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 = lduw_be_p(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 stl_be_p(buf, total_sectors - 1); 1154 stl_be_p(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 = lduw_be_p(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 = lduw_be_p(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 * BDRV_SECTOR_SIZE + 4 ? 1210 IDE_DMA_BUF_SECTORS * BDRV_SECTOR_SIZE + 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 * CONDDATA implies a command that transfers data only conditionally based 1271 * on the presence of suboptions. It should be exempt from the BCL check at 1272 * command validation time, but it needs to be checked at the command 1273 * handler level instead. 1274 */ 1275 CONDDATA = 0x08, 1276 }; 1277 1278 static const struct AtapiCmd { 1279 void (*handler)(IDEState *s, uint8_t *buf); 1280 int flags; 1281 } atapi_cmd_table[0x100] = { 1282 [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY | NONDATA }, 1283 [ 0x03 ] = { cmd_request_sense, ALLOW_UA }, 1284 [ 0x12 ] = { cmd_inquiry, ALLOW_UA }, 1285 [ 0x1b ] = { cmd_start_stop_unit, NONDATA }, /* [1] */ 1286 [ 0x1e ] = { cmd_prevent_allow_medium_removal, NONDATA }, 1287 [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY }, 1288 [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY }, 1289 [ 0x2b ] = { cmd_seek, CHECK_READY | NONDATA }, 1290 [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY }, 1291 [ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, 1292 [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, 1293 [ 0x51 ] = { cmd_read_disc_information, CHECK_READY }, 1294 [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, 1295 [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY }, 1296 [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY }, 1297 [ 0xbb ] = { cmd_set_speed, NONDATA }, 1298 [ 0xbd ] = { cmd_mechanism_status, 0 }, 1299 [ 0xbe ] = { cmd_read_cd, CHECK_READY | CONDDATA }, 1300 /* [1] handler detects and reports not ready condition itself */ 1301 }; 1302 1303 void ide_atapi_cmd(IDEState *s) 1304 { 1305 uint8_t *buf = s->io_buffer; 1306 const struct AtapiCmd *cmd = &atapi_cmd_table[s->io_buffer[0]]; 1307 1308 trace_ide_atapi_cmd(s, s->io_buffer[0]); 1309 1310 if (trace_event_get_state_backends(TRACE_IDE_ATAPI_CMD_PACKET)) { 1311 /* Each pretty-printed byte needs two bytes and a space; */ 1312 char *ppacket = g_malloc(ATAPI_PACKET_SIZE * 3 + 1); 1313 int i; 1314 for (i = 0; i < ATAPI_PACKET_SIZE; i++) { 1315 sprintf(ppacket + (i * 3), "%02x ", buf[i]); 1316 } 1317 trace_ide_atapi_cmd_packet(s, s->lcyl | (s->hcyl << 8), ppacket); 1318 g_free(ppacket); 1319 } 1320 1321 /* 1322 * If there's a UNIT_ATTENTION condition pending, only command flagged with 1323 * ALLOW_UA are allowed to complete. with other commands getting a CHECK 1324 * condition response unless a higher priority status, defined by the drive 1325 * here, is pending. 1326 */ 1327 if (s->sense_key == UNIT_ATTENTION && !(cmd->flags & ALLOW_UA)) { 1328 ide_atapi_cmd_check_status(s); 1329 return; 1330 } 1331 /* 1332 * When a CD gets changed, we have to report an ejected state and 1333 * then a loaded state to guests so that they detect tray 1334 * open/close and media change events. Guests that do not use 1335 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close 1336 * states rely on this behavior. 1337 */ 1338 if (!(cmd->flags & ALLOW_UA) && 1339 !s->tray_open && blk_is_inserted(s->blk) && s->cdrom_changed) { 1340 1341 if (s->cdrom_changed == 1) { 1342 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1343 s->cdrom_changed = 2; 1344 } else { 1345 ide_atapi_cmd_error(s, UNIT_ATTENTION, ASC_MEDIUM_MAY_HAVE_CHANGED); 1346 s->cdrom_changed = 0; 1347 } 1348 1349 return; 1350 } 1351 1352 /* Report a Not Ready condition if appropriate for the command */ 1353 if ((cmd->flags & CHECK_READY) && 1354 (!media_present(s) || !blk_is_inserted(s->blk))) 1355 { 1356 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1357 return; 1358 } 1359 1360 /* Commands that don't transfer DATA permit the byte_count_limit to be 0. 1361 * If this is a data-transferring PIO command and BCL is 0, 1362 * we abort at the /ATA/ level, not the ATAPI level. 1363 * See ATA8 ACS3 section 7.17.6.49 and 7.21.5 */ 1364 if (cmd->handler && !(cmd->flags & (NONDATA | CONDDATA))) { 1365 if (!validate_bcl(s)) { 1366 return; 1367 } 1368 } 1369 1370 /* Execute the command */ 1371 if (cmd->handler) { 1372 cmd->handler(s, buf); 1373 return; 1374 } 1375 1376 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE); 1377 }