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 cd_read_sector(IDEState *s, int lba, uint8_t *buf, int sector_size) 109 { 110 int ret; 111 112 switch(sector_size) { 113 case 2048: 114 block_acct_start(blk_get_stats(s->blk), &s->acct, 115 4 * BDRV_SECTOR_SIZE, BLOCK_ACCT_READ); 116 ret = blk_read(s->blk, (int64_t)lba << 2, buf, 4); 117 block_acct_done(blk_get_stats(s->blk), &s->acct); 118 break; 119 case 2352: 120 block_acct_start(blk_get_stats(s->blk), &s->acct, 121 4 * BDRV_SECTOR_SIZE, BLOCK_ACCT_READ); 122 ret = blk_read(s->blk, (int64_t)lba << 2, buf + 16, 4); 123 block_acct_done(blk_get_stats(s->blk), &s->acct); 124 if (ret < 0) 125 return ret; 126 cd_data_to_raw(buf, lba); 127 break; 128 default: 129 ret = -EIO; 130 break; 131 } 132 return ret; 133 } 134 135 void ide_atapi_cmd_ok(IDEState *s) 136 { 137 s->error = 0; 138 s->status = READY_STAT | SEEK_STAT; 139 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 140 ide_transfer_stop(s); 141 ide_set_irq(s->bus); 142 } 143 144 void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc) 145 { 146 #ifdef DEBUG_IDE_ATAPI 147 printf("atapi_cmd_error: sense=0x%x asc=0x%x\n", sense_key, asc); 148 #endif 149 s->error = sense_key << 4; 150 s->status = READY_STAT | ERR_STAT; 151 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 152 s->sense_key = sense_key; 153 s->asc = asc; 154 ide_transfer_stop(s); 155 ide_set_irq(s->bus); 156 } 157 158 void ide_atapi_io_error(IDEState *s, int ret) 159 { 160 /* XXX: handle more errors */ 161 if (ret == -ENOMEDIUM) { 162 ide_atapi_cmd_error(s, NOT_READY, 163 ASC_MEDIUM_NOT_PRESENT); 164 } else { 165 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 166 ASC_LOGICAL_BLOCK_OOR); 167 } 168 } 169 170 /* The whole ATAPI transfer logic is handled in this function */ 171 void ide_atapi_cmd_reply_end(IDEState *s) 172 { 173 int byte_count_limit, size, ret; 174 #ifdef DEBUG_IDE_ATAPI 175 printf("reply: tx_size=%d elem_tx_size=%d index=%d\n", 176 s->packet_transfer_size, 177 s->elementary_transfer_size, 178 s->io_buffer_index); 179 #endif 180 if (s->packet_transfer_size <= 0) { 181 /* end of transfer */ 182 ide_atapi_cmd_ok(s); 183 ide_set_irq(s->bus); 184 #ifdef DEBUG_IDE_ATAPI 185 printf("status=0x%x\n", s->status); 186 #endif 187 } else { 188 /* see if a new sector must be read */ 189 if (s->lba != -1 && s->io_buffer_index >= s->cd_sector_size) { 190 ret = cd_read_sector(s, s->lba, s->io_buffer, s->cd_sector_size); 191 if (ret < 0) { 192 ide_atapi_io_error(s, ret); 193 return; 194 } 195 s->lba++; 196 s->io_buffer_index = 0; 197 } 198 if (s->elementary_transfer_size > 0) { 199 /* there are some data left to transmit in this elementary 200 transfer */ 201 size = s->cd_sector_size - s->io_buffer_index; 202 if (size > s->elementary_transfer_size) 203 size = s->elementary_transfer_size; 204 s->packet_transfer_size -= size; 205 s->elementary_transfer_size -= size; 206 s->io_buffer_index += size; 207 ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, 208 size, ide_atapi_cmd_reply_end); 209 } else { 210 /* a new transfer is needed */ 211 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO; 212 byte_count_limit = s->lcyl | (s->hcyl << 8); 213 #ifdef DEBUG_IDE_ATAPI 214 printf("byte_count_limit=%d\n", byte_count_limit); 215 #endif 216 if (byte_count_limit == 0xffff) 217 byte_count_limit--; 218 size = s->packet_transfer_size; 219 if (size > byte_count_limit) { 220 /* byte count limit must be even if this case */ 221 if (byte_count_limit & 1) 222 byte_count_limit--; 223 size = byte_count_limit; 224 } 225 s->lcyl = size; 226 s->hcyl = size >> 8; 227 s->elementary_transfer_size = size; 228 /* we cannot transmit more than one sector at a time */ 229 if (s->lba != -1) { 230 if (size > (s->cd_sector_size - s->io_buffer_index)) 231 size = (s->cd_sector_size - s->io_buffer_index); 232 } 233 s->packet_transfer_size -= size; 234 s->elementary_transfer_size -= size; 235 s->io_buffer_index += size; 236 ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, 237 size, ide_atapi_cmd_reply_end); 238 ide_set_irq(s->bus); 239 #ifdef DEBUG_IDE_ATAPI 240 printf("status=0x%x\n", s->status); 241 #endif 242 } 243 } 244 } 245 246 /* send a reply of 'size' bytes in s->io_buffer to an ATAPI command */ 247 static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size) 248 { 249 if (size > max_size) 250 size = max_size; 251 s->lba = -1; /* no sector read */ 252 s->packet_transfer_size = size; 253 s->io_buffer_size = size; /* dma: send the reply data as one chunk */ 254 s->elementary_transfer_size = 0; 255 s->io_buffer_index = 0; 256 257 if (s->atapi_dma) { 258 block_acct_start(blk_get_stats(s->blk), &s->acct, size, 259 BLOCK_ACCT_READ); 260 s->status = READY_STAT | SEEK_STAT | DRQ_STAT; 261 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 262 } else { 263 s->status = READY_STAT | SEEK_STAT; 264 ide_atapi_cmd_reply_end(s); 265 } 266 } 267 268 /* start a CD-CDROM read command */ 269 static void ide_atapi_cmd_read_pio(IDEState *s, int lba, int nb_sectors, 270 int sector_size) 271 { 272 s->lba = lba; 273 s->packet_transfer_size = nb_sectors * sector_size; 274 s->elementary_transfer_size = 0; 275 s->io_buffer_index = sector_size; 276 s->cd_sector_size = sector_size; 277 278 s->status = READY_STAT | SEEK_STAT; 279 ide_atapi_cmd_reply_end(s); 280 } 281 282 static void ide_atapi_cmd_check_status(IDEState *s) 283 { 284 #ifdef DEBUG_IDE_ATAPI 285 printf("atapi_cmd_check_status\n"); 286 #endif 287 s->error = MC_ERR | (UNIT_ATTENTION << 4); 288 s->status = ERR_STAT; 289 s->nsector = 0; 290 ide_set_irq(s->bus); 291 } 292 /* ATAPI DMA support */ 293 294 /* XXX: handle read errors */ 295 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret) 296 { 297 IDEState *s = opaque; 298 int data_offset, n; 299 300 if (ret < 0) { 301 ide_atapi_io_error(s, ret); 302 goto eot; 303 } 304 305 if (s->io_buffer_size > 0) { 306 /* 307 * For a cdrom read sector command (s->lba != -1), 308 * adjust the lba for the next s->io_buffer_size chunk 309 * and dma the current chunk. 310 * For a command != read (s->lba == -1), just transfer 311 * the reply data. 312 */ 313 if (s->lba != -1) { 314 if (s->cd_sector_size == 2352) { 315 n = 1; 316 cd_data_to_raw(s->io_buffer, s->lba); 317 } else { 318 n = s->io_buffer_size >> 11; 319 } 320 s->lba += n; 321 } 322 s->packet_transfer_size -= s->io_buffer_size; 323 if (s->bus->dma->ops->rw_buf(s->bus->dma, 1) == 0) 324 goto eot; 325 } 326 327 if (s->packet_transfer_size <= 0) { 328 s->status = READY_STAT | SEEK_STAT; 329 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 330 ide_set_irq(s->bus); 331 goto eot; 332 } 333 334 s->io_buffer_index = 0; 335 if (s->cd_sector_size == 2352) { 336 n = 1; 337 s->io_buffer_size = s->cd_sector_size; 338 data_offset = 16; 339 } else { 340 n = s->packet_transfer_size >> 11; 341 if (n > (IDE_DMA_BUF_SECTORS / 4)) 342 n = (IDE_DMA_BUF_SECTORS / 4); 343 s->io_buffer_size = n * 2048; 344 data_offset = 0; 345 } 346 #ifdef DEBUG_AIO 347 printf("aio_read_cd: lba=%u n=%d\n", s->lba, n); 348 #endif 349 350 s->bus->dma->iov.iov_base = (void *)(s->io_buffer + data_offset); 351 s->bus->dma->iov.iov_len = n * 4 * 512; 352 qemu_iovec_init_external(&s->bus->dma->qiov, &s->bus->dma->iov, 1); 353 354 s->bus->dma->aiocb = blk_aio_readv(s->blk, (int64_t)s->lba << 2, 355 &s->bus->dma->qiov, n * 4, 356 ide_atapi_cmd_read_dma_cb, s); 357 return; 358 359 eot: 360 block_acct_done(blk_get_stats(s->blk), &s->acct); 361 ide_set_inactive(s, false); 362 } 363 364 /* start a CD-CDROM read command with DMA */ 365 /* XXX: test if DMA is available */ 366 static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors, 367 int sector_size) 368 { 369 s->lba = lba; 370 s->packet_transfer_size = nb_sectors * sector_size; 371 s->io_buffer_index = 0; 372 s->io_buffer_size = 0; 373 s->cd_sector_size = sector_size; 374 375 block_acct_start(blk_get_stats(s->blk), &s->acct, s->packet_transfer_size, 376 BLOCK_ACCT_READ); 377 378 /* XXX: check if BUSY_STAT should be set */ 379 s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT; 380 ide_start_dma(s, ide_atapi_cmd_read_dma_cb); 381 } 382 383 static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors, 384 int sector_size) 385 { 386 #ifdef DEBUG_IDE_ATAPI 387 printf("read %s: LBA=%d nb_sectors=%d\n", s->atapi_dma ? "dma" : "pio", 388 lba, nb_sectors); 389 #endif 390 if (s->atapi_dma) { 391 ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size); 392 } else { 393 ide_atapi_cmd_read_pio(s, lba, nb_sectors, sector_size); 394 } 395 } 396 397 static inline uint8_t ide_atapi_set_profile(uint8_t *buf, uint8_t *index, 398 uint16_t profile) 399 { 400 uint8_t *buf_profile = buf + 12; /* start of profiles */ 401 402 buf_profile += ((*index) * 4); /* start of indexed profile */ 403 cpu_to_ube16 (buf_profile, profile); 404 buf_profile[2] = ((buf_profile[0] == buf[6]) && (buf_profile[1] == buf[7])); 405 406 /* each profile adds 4 bytes to the response */ 407 (*index)++; 408 buf[11] += 4; /* Additional Length */ 409 410 return 4; 411 } 412 413 static int ide_dvd_read_structure(IDEState *s, int format, 414 const uint8_t *packet, uint8_t *buf) 415 { 416 switch (format) { 417 case 0x0: /* Physical format information */ 418 { 419 int layer = packet[6]; 420 uint64_t total_sectors; 421 422 if (layer != 0) 423 return -ASC_INV_FIELD_IN_CMD_PACKET; 424 425 total_sectors = s->nb_sectors >> 2; 426 if (total_sectors == 0) { 427 return -ASC_MEDIUM_NOT_PRESENT; 428 } 429 430 buf[4] = 1; /* DVD-ROM, part version 1 */ 431 buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ 432 buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ 433 buf[7] = 0; /* default densities */ 434 435 /* FIXME: 0x30000 per spec? */ 436 cpu_to_ube32(buf + 8, 0); /* start sector */ 437 cpu_to_ube32(buf + 12, total_sectors - 1); /* end sector */ 438 cpu_to_ube32(buf + 16, total_sectors - 1); /* l0 end sector */ 439 440 /* Size of buffer, not including 2 byte size field */ 441 stw_be_p(buf, 2048 + 2); 442 443 /* 2k data + 4 byte header */ 444 return (2048 + 4); 445 } 446 447 case 0x01: /* DVD copyright information */ 448 buf[4] = 0; /* no copyright data */ 449 buf[5] = 0; /* no region restrictions */ 450 451 /* Size of buffer, not including 2 byte size field */ 452 stw_be_p(buf, 4 + 2); 453 454 /* 4 byte header + 4 byte data */ 455 return (4 + 4); 456 457 case 0x03: /* BCA information - invalid field for no BCA info */ 458 return -ASC_INV_FIELD_IN_CMD_PACKET; 459 460 case 0x04: /* DVD disc manufacturing information */ 461 /* Size of buffer, not including 2 byte size field */ 462 stw_be_p(buf, 2048 + 2); 463 464 /* 2k data + 4 byte header */ 465 return (2048 + 4); 466 467 case 0xff: 468 /* 469 * This lists all the command capabilities above. Add new ones 470 * in order and update the length and buffer return values. 471 */ 472 473 buf[4] = 0x00; /* Physical format */ 474 buf[5] = 0x40; /* Not writable, is readable */ 475 stw_be_p(buf + 6, 2048 + 4); 476 477 buf[8] = 0x01; /* Copyright info */ 478 buf[9] = 0x40; /* Not writable, is readable */ 479 stw_be_p(buf + 10, 4 + 4); 480 481 buf[12] = 0x03; /* BCA info */ 482 buf[13] = 0x40; /* Not writable, is readable */ 483 stw_be_p(buf + 14, 188 + 4); 484 485 buf[16] = 0x04; /* Manufacturing info */ 486 buf[17] = 0x40; /* Not writable, is readable */ 487 stw_be_p(buf + 18, 2048 + 4); 488 489 /* Size of buffer, not including 2 byte size field */ 490 stw_be_p(buf, 16 + 2); 491 492 /* data written + 4 byte header */ 493 return (16 + 4); 494 495 default: /* TODO: formats beyond DVD-ROM requires */ 496 return -ASC_INV_FIELD_IN_CMD_PACKET; 497 } 498 } 499 500 static unsigned int event_status_media(IDEState *s, 501 uint8_t *buf) 502 { 503 uint8_t event_code, media_status; 504 505 media_status = 0; 506 if (s->tray_open) { 507 media_status = MS_TRAY_OPEN; 508 } else if (blk_is_inserted(s->blk)) { 509 media_status = MS_MEDIA_PRESENT; 510 } 511 512 /* Event notification descriptor */ 513 event_code = MEC_NO_CHANGE; 514 if (media_status != MS_TRAY_OPEN) { 515 if (s->events.new_media) { 516 event_code = MEC_NEW_MEDIA; 517 s->events.new_media = false; 518 } else if (s->events.eject_request) { 519 event_code = MEC_EJECT_REQUESTED; 520 s->events.eject_request = false; 521 } 522 } 523 524 buf[4] = event_code; 525 buf[5] = media_status; 526 527 /* These fields are reserved, just clear them. */ 528 buf[6] = 0; 529 buf[7] = 0; 530 531 return 8; /* We wrote to 4 extra bytes from the header */ 532 } 533 534 static void cmd_get_event_status_notification(IDEState *s, 535 uint8_t *buf) 536 { 537 const uint8_t *packet = buf; 538 539 struct { 540 uint8_t opcode; 541 uint8_t polled; /* lsb bit is polled; others are reserved */ 542 uint8_t reserved2[2]; 543 uint8_t class; 544 uint8_t reserved3[2]; 545 uint16_t len; 546 uint8_t control; 547 } QEMU_PACKED *gesn_cdb; 548 549 struct { 550 uint16_t len; 551 uint8_t notification_class; 552 uint8_t supported_events; 553 } QEMU_PACKED *gesn_event_header; 554 unsigned int max_len, used_len; 555 556 gesn_cdb = (void *)packet; 557 gesn_event_header = (void *)buf; 558 559 max_len = be16_to_cpu(gesn_cdb->len); 560 561 /* It is fine by the MMC spec to not support async mode operations */ 562 if (!(gesn_cdb->polled & 0x01)) { /* asynchronous mode */ 563 /* Only polling is supported, asynchronous mode is not. */ 564 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 565 ASC_INV_FIELD_IN_CMD_PACKET); 566 return; 567 } 568 569 /* polling mode operation */ 570 571 /* 572 * These are the supported events. 573 * 574 * We currently only support requests of the 'media' type. 575 * Notification class requests and supported event classes are bitmasks, 576 * but they are build from the same values as the "notification class" 577 * field. 578 */ 579 gesn_event_header->supported_events = 1 << GESN_MEDIA; 580 581 /* 582 * We use |= below to set the class field; other bits in this byte 583 * are reserved now but this is useful to do if we have to use the 584 * reserved fields later. 585 */ 586 gesn_event_header->notification_class = 0; 587 588 /* 589 * Responses to requests are to be based on request priority. The 590 * notification_class_request_type enum above specifies the 591 * priority: upper elements are higher prio than lower ones. 592 */ 593 if (gesn_cdb->class & (1 << GESN_MEDIA)) { 594 gesn_event_header->notification_class |= GESN_MEDIA; 595 used_len = event_status_media(s, buf); 596 } else { 597 gesn_event_header->notification_class = 0x80; /* No event available */ 598 used_len = sizeof(*gesn_event_header); 599 } 600 gesn_event_header->len = cpu_to_be16(used_len 601 - sizeof(*gesn_event_header)); 602 ide_atapi_cmd_reply(s, used_len, max_len); 603 } 604 605 static void cmd_request_sense(IDEState *s, uint8_t *buf) 606 { 607 int max_len = buf[4]; 608 609 memset(buf, 0, 18); 610 buf[0] = 0x70 | (1 << 7); 611 buf[2] = s->sense_key; 612 buf[7] = 10; 613 buf[12] = s->asc; 614 615 if (s->sense_key == UNIT_ATTENTION) { 616 s->sense_key = NO_SENSE; 617 } 618 619 ide_atapi_cmd_reply(s, 18, max_len); 620 } 621 622 static void cmd_inquiry(IDEState *s, uint8_t *buf) 623 { 624 int max_len = buf[4]; 625 626 buf[0] = 0x05; /* CD-ROM */ 627 buf[1] = 0x80; /* removable */ 628 buf[2] = 0x00; /* ISO */ 629 buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */ 630 buf[4] = 31; /* additional length */ 631 buf[5] = 0; /* reserved */ 632 buf[6] = 0; /* reserved */ 633 buf[7] = 0; /* reserved */ 634 padstr8(buf + 8, 8, "QEMU"); 635 padstr8(buf + 16, 16, "QEMU DVD-ROM"); 636 padstr8(buf + 32, 4, s->version); 637 ide_atapi_cmd_reply(s, 36, max_len); 638 } 639 640 static void cmd_get_configuration(IDEState *s, uint8_t *buf) 641 { 642 uint32_t len; 643 uint8_t index = 0; 644 int max_len; 645 646 /* only feature 0 is supported */ 647 if (buf[2] != 0 || buf[3] != 0) { 648 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 649 ASC_INV_FIELD_IN_CMD_PACKET); 650 return; 651 } 652 653 /* XXX: could result in alignment problems in some architectures */ 654 max_len = ube16_to_cpu(buf + 7); 655 656 /* 657 * XXX: avoid overflow for io_buffer if max_len is bigger than 658 * the size of that buffer (dimensioned to max number of 659 * sectors to transfer at once) 660 * 661 * Only a problem if the feature/profiles grow. 662 */ 663 if (max_len > 512) { 664 /* XXX: assume 1 sector */ 665 max_len = 512; 666 } 667 668 memset(buf, 0, max_len); 669 /* 670 * the number of sectors from the media tells us which profile 671 * to use as current. 0 means there is no media 672 */ 673 if (media_is_dvd(s)) { 674 cpu_to_ube16(buf + 6, MMC_PROFILE_DVD_ROM); 675 } else if (media_is_cd(s)) { 676 cpu_to_ube16(buf + 6, MMC_PROFILE_CD_ROM); 677 } 678 679 buf[10] = 0x02 | 0x01; /* persistent and current */ 680 len = 12; /* headers: 8 + 4 */ 681 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_DVD_ROM); 682 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_CD_ROM); 683 cpu_to_ube32(buf, len - 4); /* data length */ 684 685 ide_atapi_cmd_reply(s, len, max_len); 686 } 687 688 static void cmd_mode_sense(IDEState *s, uint8_t *buf) 689 { 690 int action, code; 691 int max_len; 692 693 max_len = ube16_to_cpu(buf + 7); 694 action = buf[2] >> 6; 695 code = buf[2] & 0x3f; 696 697 switch(action) { 698 case 0: /* current values */ 699 switch(code) { 700 case MODE_PAGE_R_W_ERROR: /* error recovery */ 701 cpu_to_ube16(&buf[0], 16 - 2); 702 buf[2] = 0x70; 703 buf[3] = 0; 704 buf[4] = 0; 705 buf[5] = 0; 706 buf[6] = 0; 707 buf[7] = 0; 708 709 buf[8] = MODE_PAGE_R_W_ERROR; 710 buf[9] = 16 - 10; 711 buf[10] = 0x00; 712 buf[11] = 0x05; 713 buf[12] = 0x00; 714 buf[13] = 0x00; 715 buf[14] = 0x00; 716 buf[15] = 0x00; 717 ide_atapi_cmd_reply(s, 16, max_len); 718 break; 719 case MODE_PAGE_AUDIO_CTL: 720 cpu_to_ube16(&buf[0], 24 - 2); 721 buf[2] = 0x70; 722 buf[3] = 0; 723 buf[4] = 0; 724 buf[5] = 0; 725 buf[6] = 0; 726 buf[7] = 0; 727 728 buf[8] = MODE_PAGE_AUDIO_CTL; 729 buf[9] = 24 - 10; 730 /* Fill with CDROM audio volume */ 731 buf[17] = 0; 732 buf[19] = 0; 733 buf[21] = 0; 734 buf[23] = 0; 735 736 ide_atapi_cmd_reply(s, 24, max_len); 737 break; 738 case MODE_PAGE_CAPABILITIES: 739 cpu_to_ube16(&buf[0], 30 - 2); 740 buf[2] = 0x70; 741 buf[3] = 0; 742 buf[4] = 0; 743 buf[5] = 0; 744 buf[6] = 0; 745 buf[7] = 0; 746 747 buf[8] = MODE_PAGE_CAPABILITIES; 748 buf[9] = 30 - 10; 749 buf[10] = 0x3b; /* read CDR/CDRW/DVDROM/DVDR/DVDRAM */ 750 buf[11] = 0x00; 751 752 /* Claim PLAY_AUDIO capability (0x01) since some Linux 753 code checks for this to automount media. */ 754 buf[12] = 0x71; 755 buf[13] = 3 << 5; 756 buf[14] = (1 << 0) | (1 << 3) | (1 << 5); 757 if (s->tray_locked) { 758 buf[14] |= 1 << 1; 759 } 760 buf[15] = 0x00; /* No volume & mute control, no changer */ 761 cpu_to_ube16(&buf[16], 704); /* 4x read speed */ 762 buf[18] = 0; /* Two volume levels */ 763 buf[19] = 2; 764 cpu_to_ube16(&buf[20], 512); /* 512k buffer */ 765 cpu_to_ube16(&buf[22], 704); /* 4x read speed current */ 766 buf[24] = 0; 767 buf[25] = 0; 768 buf[26] = 0; 769 buf[27] = 0; 770 buf[28] = 0; 771 buf[29] = 0; 772 ide_atapi_cmd_reply(s, 30, max_len); 773 break; 774 default: 775 goto error_cmd; 776 } 777 break; 778 case 1: /* changeable values */ 779 goto error_cmd; 780 case 2: /* default values */ 781 goto error_cmd; 782 default: 783 case 3: /* saved values */ 784 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 785 ASC_SAVING_PARAMETERS_NOT_SUPPORTED); 786 break; 787 } 788 return; 789 790 error_cmd: 791 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET); 792 } 793 794 static void cmd_test_unit_ready(IDEState *s, uint8_t *buf) 795 { 796 /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we 797 * come here, we know that it's ready. */ 798 ide_atapi_cmd_ok(s); 799 } 800 801 static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf) 802 { 803 s->tray_locked = buf[4] & 1; 804 blk_lock_medium(s->blk, buf[4] & 1); 805 ide_atapi_cmd_ok(s); 806 } 807 808 static void cmd_read(IDEState *s, uint8_t* buf) 809 { 810 int nb_sectors, lba; 811 812 if (buf[0] == GPCMD_READ_10) { 813 nb_sectors = ube16_to_cpu(buf + 7); 814 } else { 815 nb_sectors = ube32_to_cpu(buf + 6); 816 } 817 818 lba = ube32_to_cpu(buf + 2); 819 if (nb_sectors == 0) { 820 ide_atapi_cmd_ok(s); 821 return; 822 } 823 824 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 825 } 826 827 static void cmd_read_cd(IDEState *s, uint8_t* buf) 828 { 829 int nb_sectors, lba, transfer_request; 830 831 nb_sectors = (buf[6] << 16) | (buf[7] << 8) | buf[8]; 832 lba = ube32_to_cpu(buf + 2); 833 834 if (nb_sectors == 0) { 835 ide_atapi_cmd_ok(s); 836 return; 837 } 838 839 transfer_request = buf[9]; 840 switch(transfer_request & 0xf8) { 841 case 0x00: 842 /* nothing */ 843 ide_atapi_cmd_ok(s); 844 break; 845 case 0x10: 846 /* normal read */ 847 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 848 break; 849 case 0xf8: 850 /* read all data */ 851 ide_atapi_cmd_read(s, lba, nb_sectors, 2352); 852 break; 853 default: 854 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 855 ASC_INV_FIELD_IN_CMD_PACKET); 856 break; 857 } 858 } 859 860 static void cmd_seek(IDEState *s, uint8_t* buf) 861 { 862 unsigned int lba; 863 uint64_t total_sectors = s->nb_sectors >> 2; 864 865 lba = ube32_to_cpu(buf + 2); 866 if (lba >= total_sectors) { 867 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR); 868 return; 869 } 870 871 ide_atapi_cmd_ok(s); 872 } 873 874 static void cmd_start_stop_unit(IDEState *s, uint8_t* buf) 875 { 876 int sense; 877 bool start = buf[4] & 1; 878 bool loej = buf[4] & 2; /* load on start, eject on !start */ 879 int pwrcnd = buf[4] & 0xf0; 880 881 if (pwrcnd) { 882 /* eject/load only happens for power condition == 0 */ 883 return; 884 } 885 886 if (loej) { 887 if (!start && !s->tray_open && s->tray_locked) { 888 sense = blk_is_inserted(s->blk) 889 ? NOT_READY : ILLEGAL_REQUEST; 890 ide_atapi_cmd_error(s, sense, ASC_MEDIA_REMOVAL_PREVENTED); 891 return; 892 } 893 894 if (s->tray_open != !start) { 895 blk_eject(s->blk, !start); 896 s->tray_open = !start; 897 } 898 } 899 900 ide_atapi_cmd_ok(s); 901 } 902 903 static void cmd_mechanism_status(IDEState *s, uint8_t* buf) 904 { 905 int max_len = ube16_to_cpu(buf + 8); 906 907 cpu_to_ube16(buf, 0); 908 /* no current LBA */ 909 buf[2] = 0; 910 buf[3] = 0; 911 buf[4] = 0; 912 buf[5] = 1; 913 cpu_to_ube16(buf + 6, 0); 914 ide_atapi_cmd_reply(s, 8, max_len); 915 } 916 917 static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf) 918 { 919 int format, msf, start_track, len; 920 int max_len; 921 uint64_t total_sectors = s->nb_sectors >> 2; 922 923 max_len = ube16_to_cpu(buf + 7); 924 format = buf[9] >> 6; 925 msf = (buf[1] >> 1) & 1; 926 start_track = buf[6]; 927 928 switch(format) { 929 case 0: 930 len = cdrom_read_toc(total_sectors, buf, msf, start_track); 931 if (len < 0) 932 goto error_cmd; 933 ide_atapi_cmd_reply(s, len, max_len); 934 break; 935 case 1: 936 /* multi session : only a single session defined */ 937 memset(buf, 0, 12); 938 buf[1] = 0x0a; 939 buf[2] = 0x01; 940 buf[3] = 0x01; 941 ide_atapi_cmd_reply(s, 12, max_len); 942 break; 943 case 2: 944 len = cdrom_read_toc_raw(total_sectors, buf, msf, start_track); 945 if (len < 0) 946 goto error_cmd; 947 ide_atapi_cmd_reply(s, len, max_len); 948 break; 949 default: 950 error_cmd: 951 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 952 ASC_INV_FIELD_IN_CMD_PACKET); 953 } 954 } 955 956 static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf) 957 { 958 uint64_t total_sectors = s->nb_sectors >> 2; 959 960 /* NOTE: it is really the number of sectors minus 1 */ 961 cpu_to_ube32(buf, total_sectors - 1); 962 cpu_to_ube32(buf + 4, 2048); 963 ide_atapi_cmd_reply(s, 8, 8); 964 } 965 966 static void cmd_read_disc_information(IDEState *s, uint8_t* buf) 967 { 968 uint8_t type = buf[1] & 7; 969 uint32_t max_len = ube16_to_cpu(buf + 7); 970 971 /* Types 1/2 are only defined for Blu-Ray. */ 972 if (type != 0) { 973 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 974 ASC_INV_FIELD_IN_CMD_PACKET); 975 return; 976 } 977 978 memset(buf, 0, 34); 979 buf[1] = 32; 980 buf[2] = 0xe; /* last session complete, disc finalized */ 981 buf[3] = 1; /* first track on disc */ 982 buf[4] = 1; /* # of sessions */ 983 buf[5] = 1; /* first track of last session */ 984 buf[6] = 1; /* last track of last session */ 985 buf[7] = 0x20; /* unrestricted use */ 986 buf[8] = 0x00; /* CD-ROM or DVD-ROM */ 987 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */ 988 /* 12-23: not meaningful for CD-ROM or DVD-ROM */ 989 /* 24-31: disc bar code */ 990 /* 32: disc application code */ 991 /* 33: number of OPC tables */ 992 993 ide_atapi_cmd_reply(s, 34, max_len); 994 } 995 996 static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf) 997 { 998 int max_len; 999 int media = buf[1]; 1000 int format = buf[7]; 1001 int ret; 1002 1003 max_len = ube16_to_cpu(buf + 8); 1004 1005 if (format < 0xff) { 1006 if (media_is_cd(s)) { 1007 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1008 ASC_INCOMPATIBLE_FORMAT); 1009 return; 1010 } else if (!media_present(s)) { 1011 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1012 ASC_INV_FIELD_IN_CMD_PACKET); 1013 return; 1014 } 1015 } 1016 1017 memset(buf, 0, max_len > IDE_DMA_BUF_SECTORS * 512 + 4 ? 1018 IDE_DMA_BUF_SECTORS * 512 + 4 : max_len); 1019 1020 switch (format) { 1021 case 0x00 ... 0x7f: 1022 case 0xff: 1023 if (media == 0) { 1024 ret = ide_dvd_read_structure(s, format, buf, buf); 1025 1026 if (ret < 0) { 1027 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, -ret); 1028 } else { 1029 ide_atapi_cmd_reply(s, ret, max_len); 1030 } 1031 1032 break; 1033 } 1034 /* TODO: BD support, fall through for now */ 1035 1036 /* Generic disk structures */ 1037 case 0x80: /* TODO: AACS volume identifier */ 1038 case 0x81: /* TODO: AACS media serial number */ 1039 case 0x82: /* TODO: AACS media identifier */ 1040 case 0x83: /* TODO: AACS media key block */ 1041 case 0x90: /* TODO: List of recognized format layers */ 1042 case 0xc0: /* TODO: Write protection status */ 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_set_speed(IDEState *s, uint8_t* buf) 1051 { 1052 ide_atapi_cmd_ok(s); 1053 } 1054 1055 enum { 1056 /* 1057 * Only commands flagged as ALLOW_UA are allowed to run under a 1058 * unit attention condition. (See MMC-5, section 4.1.6.1) 1059 */ 1060 ALLOW_UA = 0x01, 1061 1062 /* 1063 * Commands flagged with CHECK_READY can only execute if a medium is present. 1064 * Otherwise they report the Not Ready Condition. (See MMC-5, section 1065 * 4.1.8) 1066 */ 1067 CHECK_READY = 0x02, 1068 }; 1069 1070 static const struct { 1071 void (*handler)(IDEState *s, uint8_t *buf); 1072 int flags; 1073 } atapi_cmd_table[0x100] = { 1074 [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY }, 1075 [ 0x03 ] = { cmd_request_sense, ALLOW_UA }, 1076 [ 0x12 ] = { cmd_inquiry, ALLOW_UA }, 1077 [ 0x1b ] = { cmd_start_stop_unit, 0 }, /* [1] */ 1078 [ 0x1e ] = { cmd_prevent_allow_medium_removal, 0 }, 1079 [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY }, 1080 [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY }, 1081 [ 0x2b ] = { cmd_seek, CHECK_READY }, 1082 [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY }, 1083 [ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, 1084 [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, 1085 [ 0x51 ] = { cmd_read_disc_information, CHECK_READY }, 1086 [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, 1087 [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY }, 1088 [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY }, 1089 [ 0xbb ] = { cmd_set_speed, 0 }, 1090 [ 0xbd ] = { cmd_mechanism_status, 0 }, 1091 [ 0xbe ] = { cmd_read_cd, CHECK_READY }, 1092 /* [1] handler detects and reports not ready condition itself */ 1093 }; 1094 1095 void ide_atapi_cmd(IDEState *s) 1096 { 1097 uint8_t *buf; 1098 1099 buf = s->io_buffer; 1100 #ifdef DEBUG_IDE_ATAPI 1101 { 1102 int i; 1103 printf("ATAPI limit=0x%x packet:", s->lcyl | (s->hcyl << 8)); 1104 for(i = 0; i < ATAPI_PACKET_SIZE; i++) { 1105 printf(" %02x", buf[i]); 1106 } 1107 printf("\n"); 1108 } 1109 #endif 1110 /* 1111 * If there's a UNIT_ATTENTION condition pending, only command flagged with 1112 * ALLOW_UA are allowed to complete. with other commands getting a CHECK 1113 * condition response unless a higher priority status, defined by the drive 1114 * here, is pending. 1115 */ 1116 if (s->sense_key == UNIT_ATTENTION && 1117 !(atapi_cmd_table[s->io_buffer[0]].flags & ALLOW_UA)) { 1118 ide_atapi_cmd_check_status(s); 1119 return; 1120 } 1121 /* 1122 * When a CD gets changed, we have to report an ejected state and 1123 * then a loaded state to guests so that they detect tray 1124 * open/close and media change events. Guests that do not use 1125 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close 1126 * states rely on this behavior. 1127 */ 1128 if (!(atapi_cmd_table[s->io_buffer[0]].flags & ALLOW_UA) && 1129 !s->tray_open && blk_is_inserted(s->blk) && s->cdrom_changed) { 1130 1131 if (s->cdrom_changed == 1) { 1132 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1133 s->cdrom_changed = 2; 1134 } else { 1135 ide_atapi_cmd_error(s, UNIT_ATTENTION, ASC_MEDIUM_MAY_HAVE_CHANGED); 1136 s->cdrom_changed = 0; 1137 } 1138 1139 return; 1140 } 1141 1142 /* Report a Not Ready condition if appropriate for the command */ 1143 if ((atapi_cmd_table[s->io_buffer[0]].flags & CHECK_READY) && 1144 (!media_present(s) || !blk_is_inserted(s->blk))) 1145 { 1146 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1147 return; 1148 } 1149 1150 /* Execute the command */ 1151 if (atapi_cmd_table[s->io_buffer[0]].handler) { 1152 atapi_cmd_table[s->io_buffer[0]].handler(s, buf); 1153 return; 1154 } 1155 1156 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE); 1157 } 1158