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.h" 28 29 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret); 30 31 static void padstr8(uint8_t *buf, int buf_size, const char *src) 32 { 33 int i; 34 for(i = 0; i < buf_size; i++) { 35 if (*src) 36 buf[i] = *src++; 37 else 38 buf[i] = ' '; 39 } 40 } 41 42 static inline void cpu_to_ube16(uint8_t *buf, int val) 43 { 44 buf[0] = val >> 8; 45 buf[1] = val & 0xff; 46 } 47 48 static inline void cpu_to_ube32(uint8_t *buf, unsigned int val) 49 { 50 buf[0] = val >> 24; 51 buf[1] = val >> 16; 52 buf[2] = val >> 8; 53 buf[3] = val & 0xff; 54 } 55 56 static inline int ube16_to_cpu(const uint8_t *buf) 57 { 58 return (buf[0] << 8) | buf[1]; 59 } 60 61 static inline int ube32_to_cpu(const uint8_t *buf) 62 { 63 return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; 64 } 65 66 static void lba_to_msf(uint8_t *buf, int lba) 67 { 68 lba += 150; 69 buf[0] = (lba / 75) / 60; 70 buf[1] = (lba / 75) % 60; 71 buf[2] = lba % 75; 72 } 73 74 static inline int media_present(IDEState *s) 75 { 76 return !s->tray_open && s->nb_sectors > 0; 77 } 78 79 /* XXX: DVDs that could fit on a CD will be reported as a CD */ 80 static inline int media_is_dvd(IDEState *s) 81 { 82 return (media_present(s) && s->nb_sectors > CD_MAX_SECTORS); 83 } 84 85 static inline int media_is_cd(IDEState *s) 86 { 87 return (media_present(s) && s->nb_sectors <= CD_MAX_SECTORS); 88 } 89 90 static void cd_data_to_raw(uint8_t *buf, int lba) 91 { 92 /* sync bytes */ 93 buf[0] = 0x00; 94 memset(buf + 1, 0xff, 10); 95 buf[11] = 0x00; 96 buf += 12; 97 /* MSF */ 98 lba_to_msf(buf, lba); 99 buf[3] = 0x01; /* mode 1 data */ 100 buf += 4; 101 /* data */ 102 buf += 2048; 103 /* XXX: ECC not computed */ 104 memset(buf, 0, 288); 105 } 106 107 static int cd_read_sector(IDEState *s, int lba, uint8_t *buf, int sector_size) 108 { 109 int ret; 110 111 switch(sector_size) { 112 case 2048: 113 bdrv_acct_start(s->bs, &s->acct, 4 * BDRV_SECTOR_SIZE, BDRV_ACCT_READ); 114 ret = bdrv_read(s->bs, (int64_t)lba << 2, buf, 4); 115 bdrv_acct_done(s->bs, &s->acct); 116 break; 117 case 2352: 118 bdrv_acct_start(s->bs, &s->acct, 4 * BDRV_SECTOR_SIZE, BDRV_ACCT_READ); 119 ret = bdrv_read(s->bs, (int64_t)lba << 2, buf + 16, 4); 120 bdrv_acct_done(s->bs, &s->acct); 121 if (ret < 0) 122 return ret; 123 cd_data_to_raw(buf, lba); 124 break; 125 default: 126 ret = -EIO; 127 break; 128 } 129 return ret; 130 } 131 132 void ide_atapi_cmd_ok(IDEState *s) 133 { 134 s->error = 0; 135 s->status = READY_STAT | SEEK_STAT; 136 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 137 ide_set_irq(s->bus); 138 } 139 140 void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc) 141 { 142 #ifdef DEBUG_IDE_ATAPI 143 printf("atapi_cmd_error: sense=0x%x asc=0x%x\n", sense_key, asc); 144 #endif 145 s->error = sense_key << 4; 146 s->status = READY_STAT | ERR_STAT; 147 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 148 s->sense_key = sense_key; 149 s->asc = asc; 150 ide_set_irq(s->bus); 151 } 152 153 void ide_atapi_io_error(IDEState *s, int ret) 154 { 155 /* XXX: handle more errors */ 156 if (ret == -ENOMEDIUM) { 157 ide_atapi_cmd_error(s, NOT_READY, 158 ASC_MEDIUM_NOT_PRESENT); 159 } else { 160 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 161 ASC_LOGICAL_BLOCK_OOR); 162 } 163 } 164 165 /* The whole ATAPI transfer logic is handled in this function */ 166 void ide_atapi_cmd_reply_end(IDEState *s) 167 { 168 int byte_count_limit, size, ret; 169 #ifdef DEBUG_IDE_ATAPI 170 printf("reply: tx_size=%d elem_tx_size=%d index=%d\n", 171 s->packet_transfer_size, 172 s->elementary_transfer_size, 173 s->io_buffer_index); 174 #endif 175 if (s->packet_transfer_size <= 0) { 176 /* end of transfer */ 177 ide_transfer_stop(s); 178 s->status = READY_STAT | SEEK_STAT; 179 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 180 ide_set_irq(s->bus); 181 #ifdef DEBUG_IDE_ATAPI 182 printf("status=0x%x\n", s->status); 183 #endif 184 } else { 185 /* see if a new sector must be read */ 186 if (s->lba != -1 && s->io_buffer_index >= s->cd_sector_size) { 187 ret = cd_read_sector(s, s->lba, s->io_buffer, s->cd_sector_size); 188 if (ret < 0) { 189 ide_transfer_stop(s); 190 ide_atapi_io_error(s, ret); 191 return; 192 } 193 s->lba++; 194 s->io_buffer_index = 0; 195 } 196 if (s->elementary_transfer_size > 0) { 197 /* there are some data left to transmit in this elementary 198 transfer */ 199 size = s->cd_sector_size - s->io_buffer_index; 200 if (size > s->elementary_transfer_size) 201 size = s->elementary_transfer_size; 202 s->packet_transfer_size -= size; 203 s->elementary_transfer_size -= size; 204 s->io_buffer_index += size; 205 ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, 206 size, ide_atapi_cmd_reply_end); 207 } else { 208 /* a new transfer is needed */ 209 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO; 210 byte_count_limit = s->lcyl | (s->hcyl << 8); 211 #ifdef DEBUG_IDE_ATAPI 212 printf("byte_count_limit=%d\n", byte_count_limit); 213 #endif 214 if (byte_count_limit == 0xffff) 215 byte_count_limit--; 216 size = s->packet_transfer_size; 217 if (size > byte_count_limit) { 218 /* byte count limit must be even if this case */ 219 if (byte_count_limit & 1) 220 byte_count_limit--; 221 size = byte_count_limit; 222 } 223 s->lcyl = size; 224 s->hcyl = size >> 8; 225 s->elementary_transfer_size = size; 226 /* we cannot transmit more than one sector at a time */ 227 if (s->lba != -1) { 228 if (size > (s->cd_sector_size - s->io_buffer_index)) 229 size = (s->cd_sector_size - s->io_buffer_index); 230 } 231 s->packet_transfer_size -= size; 232 s->elementary_transfer_size -= size; 233 s->io_buffer_index += size; 234 ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, 235 size, ide_atapi_cmd_reply_end); 236 ide_set_irq(s->bus); 237 #ifdef DEBUG_IDE_ATAPI 238 printf("status=0x%x\n", s->status); 239 #endif 240 } 241 } 242 } 243 244 /* send a reply of 'size' bytes in s->io_buffer to an ATAPI command */ 245 static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size) 246 { 247 if (size > max_size) 248 size = max_size; 249 s->lba = -1; /* no sector read */ 250 s->packet_transfer_size = size; 251 s->io_buffer_size = size; /* dma: send the reply data as one chunk */ 252 s->elementary_transfer_size = 0; 253 s->io_buffer_index = 0; 254 255 if (s->atapi_dma) { 256 bdrv_acct_start(s->bs, &s->acct, size, BDRV_ACCT_READ); 257 s->status = READY_STAT | SEEK_STAT | DRQ_STAT; 258 s->bus->dma->ops->start_dma(s->bus->dma, s, 259 ide_atapi_cmd_read_dma_cb); 260 } else { 261 s->status = READY_STAT | SEEK_STAT; 262 ide_atapi_cmd_reply_end(s); 263 } 264 } 265 266 /* start a CD-CDROM read command */ 267 static void ide_atapi_cmd_read_pio(IDEState *s, int lba, int nb_sectors, 268 int sector_size) 269 { 270 s->lba = lba; 271 s->packet_transfer_size = nb_sectors * sector_size; 272 s->elementary_transfer_size = 0; 273 s->io_buffer_index = sector_size; 274 s->cd_sector_size = sector_size; 275 276 s->status = READY_STAT | SEEK_STAT; 277 ide_atapi_cmd_reply_end(s); 278 } 279 280 static void ide_atapi_cmd_check_status(IDEState *s) 281 { 282 #ifdef DEBUG_IDE_ATAPI 283 printf("atapi_cmd_check_status\n"); 284 #endif 285 s->error = MC_ERR | (UNIT_ATTENTION << 4); 286 s->status = ERR_STAT; 287 s->nsector = 0; 288 ide_set_irq(s->bus); 289 } 290 /* ATAPI DMA support */ 291 292 /* XXX: handle read errors */ 293 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret) 294 { 295 IDEState *s = opaque; 296 int data_offset, n; 297 298 if (ret < 0) { 299 ide_atapi_io_error(s, ret); 300 goto eot; 301 } 302 303 if (s->io_buffer_size > 0) { 304 /* 305 * For a cdrom read sector command (s->lba != -1), 306 * adjust the lba for the next s->io_buffer_size chunk 307 * and dma the current chunk. 308 * For a command != read (s->lba == -1), just transfer 309 * the reply data. 310 */ 311 if (s->lba != -1) { 312 if (s->cd_sector_size == 2352) { 313 n = 1; 314 cd_data_to_raw(s->io_buffer, s->lba); 315 } else { 316 n = s->io_buffer_size >> 11; 317 } 318 s->lba += n; 319 } 320 s->packet_transfer_size -= s->io_buffer_size; 321 if (s->bus->dma->ops->rw_buf(s->bus->dma, 1) == 0) 322 goto eot; 323 } 324 325 if (s->packet_transfer_size <= 0) { 326 s->status = READY_STAT | SEEK_STAT; 327 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; 328 ide_set_irq(s->bus); 329 goto eot; 330 } 331 332 s->io_buffer_index = 0; 333 if (s->cd_sector_size == 2352) { 334 n = 1; 335 s->io_buffer_size = s->cd_sector_size; 336 data_offset = 16; 337 } else { 338 n = s->packet_transfer_size >> 11; 339 if (n > (IDE_DMA_BUF_SECTORS / 4)) 340 n = (IDE_DMA_BUF_SECTORS / 4); 341 s->io_buffer_size = n * 2048; 342 data_offset = 0; 343 } 344 #ifdef DEBUG_AIO 345 printf("aio_read_cd: lba=%u n=%d\n", s->lba, n); 346 #endif 347 348 s->bus->dma->iov.iov_base = (void *)(s->io_buffer + data_offset); 349 s->bus->dma->iov.iov_len = n * 4 * 512; 350 qemu_iovec_init_external(&s->bus->dma->qiov, &s->bus->dma->iov, 1); 351 352 s->bus->dma->aiocb = bdrv_aio_readv(s->bs, (int64_t)s->lba << 2, 353 &s->bus->dma->qiov, n * 4, 354 ide_atapi_cmd_read_dma_cb, s); 355 if (!s->bus->dma->aiocb) { 356 /* Note: media not present is the most likely case */ 357 ide_atapi_cmd_error(s, NOT_READY, 358 ASC_MEDIUM_NOT_PRESENT); 359 goto eot; 360 } 361 362 return; 363 eot: 364 bdrv_acct_done(s->bs, &s->acct); 365 s->bus->dma->ops->add_status(s->bus->dma, BM_STATUS_INT); 366 ide_set_inactive(s); 367 } 368 369 /* start a CD-CDROM read command with DMA */ 370 /* XXX: test if DMA is available */ 371 static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors, 372 int sector_size) 373 { 374 s->lba = lba; 375 s->packet_transfer_size = nb_sectors * sector_size; 376 s->io_buffer_index = 0; 377 s->io_buffer_size = 0; 378 s->cd_sector_size = sector_size; 379 380 bdrv_acct_start(s->bs, &s->acct, s->packet_transfer_size, BDRV_ACCT_READ); 381 382 /* XXX: check if BUSY_STAT should be set */ 383 s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT; 384 s->bus->dma->ops->start_dma(s->bus->dma, s, 385 ide_atapi_cmd_read_dma_cb); 386 } 387 388 static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors, 389 int sector_size) 390 { 391 #ifdef DEBUG_IDE_ATAPI 392 printf("read %s: LBA=%d nb_sectors=%d\n", s->atapi_dma ? "dma" : "pio", 393 lba, nb_sectors); 394 #endif 395 if (s->atapi_dma) { 396 ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size); 397 } else { 398 ide_atapi_cmd_read_pio(s, lba, nb_sectors, sector_size); 399 } 400 } 401 402 static inline uint8_t ide_atapi_set_profile(uint8_t *buf, uint8_t *index, 403 uint16_t profile) 404 { 405 uint8_t *buf_profile = buf + 12; /* start of profiles */ 406 407 buf_profile += ((*index) * 4); /* start of indexed profile */ 408 cpu_to_ube16 (buf_profile, profile); 409 buf_profile[2] = ((buf_profile[0] == buf[6]) && (buf_profile[1] == buf[7])); 410 411 /* each profile adds 4 bytes to the response */ 412 (*index)++; 413 buf[11] += 4; /* Additional Length */ 414 415 return 4; 416 } 417 418 static int ide_dvd_read_structure(IDEState *s, int format, 419 const uint8_t *packet, uint8_t *buf) 420 { 421 switch (format) { 422 case 0x0: /* Physical format information */ 423 { 424 int layer = packet[6]; 425 uint64_t total_sectors; 426 427 if (layer != 0) 428 return -ASC_INV_FIELD_IN_CMD_PACKET; 429 430 total_sectors = s->nb_sectors >> 2; 431 if (total_sectors == 0) { 432 return -ASC_MEDIUM_NOT_PRESENT; 433 } 434 435 buf[4] = 1; /* DVD-ROM, part version 1 */ 436 buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ 437 buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ 438 buf[7] = 0; /* default densities */ 439 440 /* FIXME: 0x30000 per spec? */ 441 cpu_to_ube32(buf + 8, 0); /* start sector */ 442 cpu_to_ube32(buf + 12, total_sectors - 1); /* end sector */ 443 cpu_to_ube32(buf + 16, total_sectors - 1); /* l0 end sector */ 444 445 /* Size of buffer, not including 2 byte size field */ 446 cpu_to_be16wu((uint16_t *)buf, 2048 + 2); 447 448 /* 2k data + 4 byte header */ 449 return (2048 + 4); 450 } 451 452 case 0x01: /* DVD copyright information */ 453 buf[4] = 0; /* no copyright data */ 454 buf[5] = 0; /* no region restrictions */ 455 456 /* Size of buffer, not including 2 byte size field */ 457 cpu_to_be16wu((uint16_t *)buf, 4 + 2); 458 459 /* 4 byte header + 4 byte data */ 460 return (4 + 4); 461 462 case 0x03: /* BCA information - invalid field for no BCA info */ 463 return -ASC_INV_FIELD_IN_CMD_PACKET; 464 465 case 0x04: /* DVD disc manufacturing information */ 466 /* Size of buffer, not including 2 byte size field */ 467 cpu_to_be16wu((uint16_t *)buf, 2048 + 2); 468 469 /* 2k data + 4 byte header */ 470 return (2048 + 4); 471 472 case 0xff: 473 /* 474 * This lists all the command capabilities above. Add new ones 475 * in order and update the length and buffer return values. 476 */ 477 478 buf[4] = 0x00; /* Physical format */ 479 buf[5] = 0x40; /* Not writable, is readable */ 480 cpu_to_be16wu((uint16_t *)(buf + 6), 2048 + 4); 481 482 buf[8] = 0x01; /* Copyright info */ 483 buf[9] = 0x40; /* Not writable, is readable */ 484 cpu_to_be16wu((uint16_t *)(buf + 10), 4 + 4); 485 486 buf[12] = 0x03; /* BCA info */ 487 buf[13] = 0x40; /* Not writable, is readable */ 488 cpu_to_be16wu((uint16_t *)(buf + 14), 188 + 4); 489 490 buf[16] = 0x04; /* Manufacturing info */ 491 buf[17] = 0x40; /* Not writable, is readable */ 492 cpu_to_be16wu((uint16_t *)(buf + 18), 2048 + 4); 493 494 /* Size of buffer, not including 2 byte size field */ 495 cpu_to_be16wu((uint16_t *)buf, 16 + 2); 496 497 /* data written + 4 byte header */ 498 return (16 + 4); 499 500 default: /* TODO: formats beyond DVD-ROM requires */ 501 return -ASC_INV_FIELD_IN_CMD_PACKET; 502 } 503 } 504 505 static unsigned int event_status_media(IDEState *s, 506 uint8_t *buf) 507 { 508 uint8_t event_code, media_status; 509 510 media_status = 0; 511 if (s->tray_open) { 512 media_status = MS_TRAY_OPEN; 513 } else if (bdrv_is_inserted(s->bs)) { 514 media_status = MS_MEDIA_PRESENT; 515 } 516 517 /* Event notification descriptor */ 518 event_code = MEC_NO_CHANGE; 519 if (media_status != MS_TRAY_OPEN) { 520 if (s->events.new_media) { 521 event_code = MEC_NEW_MEDIA; 522 s->events.new_media = false; 523 } else if (s->events.eject_request) { 524 event_code = MEC_EJECT_REQUESTED; 525 s->events.eject_request = false; 526 } 527 } 528 529 buf[4] = event_code; 530 buf[5] = media_status; 531 532 /* These fields are reserved, just clear them. */ 533 buf[6] = 0; 534 buf[7] = 0; 535 536 return 8; /* We wrote to 4 extra bytes from the header */ 537 } 538 539 static void cmd_get_event_status_notification(IDEState *s, 540 uint8_t *buf) 541 { 542 const uint8_t *packet = buf; 543 544 struct { 545 uint8_t opcode; 546 uint8_t polled; /* lsb bit is polled; others are reserved */ 547 uint8_t reserved2[2]; 548 uint8_t class; 549 uint8_t reserved3[2]; 550 uint16_t len; 551 uint8_t control; 552 } QEMU_PACKED *gesn_cdb; 553 554 struct { 555 uint16_t len; 556 uint8_t notification_class; 557 uint8_t supported_events; 558 } QEMU_PACKED *gesn_event_header; 559 unsigned int max_len, used_len; 560 561 gesn_cdb = (void *)packet; 562 gesn_event_header = (void *)buf; 563 564 max_len = be16_to_cpu(gesn_cdb->len); 565 566 /* It is fine by the MMC spec to not support async mode operations */ 567 if (!(gesn_cdb->polled & 0x01)) { /* asynchronous mode */ 568 /* Only polling is supported, asynchronous mode is not. */ 569 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 570 ASC_INV_FIELD_IN_CMD_PACKET); 571 return; 572 } 573 574 /* polling mode operation */ 575 576 /* 577 * These are the supported events. 578 * 579 * We currently only support requests of the 'media' type. 580 * Notification class requests and supported event classes are bitmasks, 581 * but they are build from the same values as the "notification class" 582 * field. 583 */ 584 gesn_event_header->supported_events = 1 << GESN_MEDIA; 585 586 /* 587 * We use |= below to set the class field; other bits in this byte 588 * are reserved now but this is useful to do if we have to use the 589 * reserved fields later. 590 */ 591 gesn_event_header->notification_class = 0; 592 593 /* 594 * Responses to requests are to be based on request priority. The 595 * notification_class_request_type enum above specifies the 596 * priority: upper elements are higher prio than lower ones. 597 */ 598 if (gesn_cdb->class & (1 << GESN_MEDIA)) { 599 gesn_event_header->notification_class |= GESN_MEDIA; 600 used_len = event_status_media(s, buf); 601 } else { 602 gesn_event_header->notification_class = 0x80; /* No event available */ 603 used_len = sizeof(*gesn_event_header); 604 } 605 gesn_event_header->len = cpu_to_be16(used_len 606 - sizeof(*gesn_event_header)); 607 ide_atapi_cmd_reply(s, used_len, max_len); 608 } 609 610 static void cmd_request_sense(IDEState *s, uint8_t *buf) 611 { 612 int max_len = buf[4]; 613 614 memset(buf, 0, 18); 615 buf[0] = 0x70 | (1 << 7); 616 buf[2] = s->sense_key; 617 buf[7] = 10; 618 buf[12] = s->asc; 619 620 if (s->sense_key == UNIT_ATTENTION) { 621 s->sense_key = NO_SENSE; 622 } 623 624 ide_atapi_cmd_reply(s, 18, max_len); 625 } 626 627 static void cmd_inquiry(IDEState *s, uint8_t *buf) 628 { 629 int max_len = buf[4]; 630 631 buf[0] = 0x05; /* CD-ROM */ 632 buf[1] = 0x80; /* removable */ 633 buf[2] = 0x00; /* ISO */ 634 buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */ 635 buf[4] = 31; /* additional length */ 636 buf[5] = 0; /* reserved */ 637 buf[6] = 0; /* reserved */ 638 buf[7] = 0; /* reserved */ 639 padstr8(buf + 8, 8, "QEMU"); 640 padstr8(buf + 16, 16, "QEMU DVD-ROM"); 641 padstr8(buf + 32, 4, s->version); 642 ide_atapi_cmd_reply(s, 36, max_len); 643 } 644 645 static void cmd_get_configuration(IDEState *s, uint8_t *buf) 646 { 647 uint32_t len; 648 uint8_t index = 0; 649 int max_len; 650 651 /* only feature 0 is supported */ 652 if (buf[2] != 0 || buf[3] != 0) { 653 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 654 ASC_INV_FIELD_IN_CMD_PACKET); 655 return; 656 } 657 658 /* XXX: could result in alignment problems in some architectures */ 659 max_len = ube16_to_cpu(buf + 7); 660 661 /* 662 * XXX: avoid overflow for io_buffer if max_len is bigger than 663 * the size of that buffer (dimensioned to max number of 664 * sectors to transfer at once) 665 * 666 * Only a problem if the feature/profiles grow. 667 */ 668 if (max_len > 512) { 669 /* XXX: assume 1 sector */ 670 max_len = 512; 671 } 672 673 memset(buf, 0, max_len); 674 /* 675 * the number of sectors from the media tells us which profile 676 * to use as current. 0 means there is no media 677 */ 678 if (media_is_dvd(s)) { 679 cpu_to_ube16(buf + 6, MMC_PROFILE_DVD_ROM); 680 } else if (media_is_cd(s)) { 681 cpu_to_ube16(buf + 6, MMC_PROFILE_CD_ROM); 682 } 683 684 buf[10] = 0x02 | 0x01; /* persistent and current */ 685 len = 12; /* headers: 8 + 4 */ 686 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_DVD_ROM); 687 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_CD_ROM); 688 cpu_to_ube32(buf, len - 4); /* data length */ 689 690 ide_atapi_cmd_reply(s, len, max_len); 691 } 692 693 static void cmd_mode_sense(IDEState *s, uint8_t *buf) 694 { 695 int action, code; 696 int max_len; 697 698 max_len = ube16_to_cpu(buf + 7); 699 action = buf[2] >> 6; 700 code = buf[2] & 0x3f; 701 702 switch(action) { 703 case 0: /* current values */ 704 switch(code) { 705 case MODE_PAGE_R_W_ERROR: /* error recovery */ 706 cpu_to_ube16(&buf[0], 16 - 2); 707 buf[2] = 0x70; 708 buf[3] = 0; 709 buf[4] = 0; 710 buf[5] = 0; 711 buf[6] = 0; 712 buf[7] = 0; 713 714 buf[8] = MODE_PAGE_R_W_ERROR; 715 buf[9] = 16 - 10; 716 buf[10] = 0x00; 717 buf[11] = 0x05; 718 buf[12] = 0x00; 719 buf[13] = 0x00; 720 buf[14] = 0x00; 721 buf[15] = 0x00; 722 ide_atapi_cmd_reply(s, 16, max_len); 723 break; 724 case MODE_PAGE_AUDIO_CTL: 725 cpu_to_ube16(&buf[0], 24 - 2); 726 buf[2] = 0x70; 727 buf[3] = 0; 728 buf[4] = 0; 729 buf[5] = 0; 730 buf[6] = 0; 731 buf[7] = 0; 732 733 buf[8] = MODE_PAGE_AUDIO_CTL; 734 buf[9] = 24 - 10; 735 /* Fill with CDROM audio volume */ 736 buf[17] = 0; 737 buf[19] = 0; 738 buf[21] = 0; 739 buf[23] = 0; 740 741 ide_atapi_cmd_reply(s, 24, max_len); 742 break; 743 case MODE_PAGE_CAPABILITIES: 744 cpu_to_ube16(&buf[0], 30 - 2); 745 buf[2] = 0x70; 746 buf[3] = 0; 747 buf[4] = 0; 748 buf[5] = 0; 749 buf[6] = 0; 750 buf[7] = 0; 751 752 buf[8] = MODE_PAGE_CAPABILITIES; 753 buf[9] = 30 - 10; 754 buf[10] = 0x3b; /* read CDR/CDRW/DVDROM/DVDR/DVDRAM */ 755 buf[11] = 0x00; 756 757 /* Claim PLAY_AUDIO capability (0x01) since some Linux 758 code checks for this to automount media. */ 759 buf[12] = 0x71; 760 buf[13] = 3 << 5; 761 buf[14] = (1 << 0) | (1 << 3) | (1 << 5); 762 if (s->tray_locked) { 763 buf[14] |= 1 << 1; 764 } 765 buf[15] = 0x00; /* No volume & mute control, no changer */ 766 cpu_to_ube16(&buf[16], 704); /* 4x read speed */ 767 buf[18] = 0; /* Two volume levels */ 768 buf[19] = 2; 769 cpu_to_ube16(&buf[20], 512); /* 512k buffer */ 770 cpu_to_ube16(&buf[22], 704); /* 4x read speed current */ 771 buf[24] = 0; 772 buf[25] = 0; 773 buf[26] = 0; 774 buf[27] = 0; 775 buf[28] = 0; 776 buf[29] = 0; 777 ide_atapi_cmd_reply(s, 30, max_len); 778 break; 779 default: 780 goto error_cmd; 781 } 782 break; 783 case 1: /* changeable values */ 784 goto error_cmd; 785 case 2: /* default values */ 786 goto error_cmd; 787 default: 788 case 3: /* saved values */ 789 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 790 ASC_SAVING_PARAMETERS_NOT_SUPPORTED); 791 break; 792 } 793 return; 794 795 error_cmd: 796 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET); 797 } 798 799 static void cmd_test_unit_ready(IDEState *s, uint8_t *buf) 800 { 801 /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we 802 * come here, we know that it's ready. */ 803 ide_atapi_cmd_ok(s); 804 } 805 806 static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf) 807 { 808 s->tray_locked = buf[4] & 1; 809 bdrv_lock_medium(s->bs, buf[4] & 1); 810 ide_atapi_cmd_ok(s); 811 } 812 813 static void cmd_read(IDEState *s, uint8_t* buf) 814 { 815 int nb_sectors, lba; 816 817 if (buf[0] == GPCMD_READ_10) { 818 nb_sectors = ube16_to_cpu(buf + 7); 819 } else { 820 nb_sectors = ube32_to_cpu(buf + 6); 821 } 822 823 lba = ube32_to_cpu(buf + 2); 824 if (nb_sectors == 0) { 825 ide_atapi_cmd_ok(s); 826 return; 827 } 828 829 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 830 } 831 832 static void cmd_read_cd(IDEState *s, uint8_t* buf) 833 { 834 int nb_sectors, lba, transfer_request; 835 836 nb_sectors = (buf[6] << 16) | (buf[7] << 8) | buf[8]; 837 lba = ube32_to_cpu(buf + 2); 838 839 if (nb_sectors == 0) { 840 ide_atapi_cmd_ok(s); 841 return; 842 } 843 844 transfer_request = buf[9]; 845 switch(transfer_request & 0xf8) { 846 case 0x00: 847 /* nothing */ 848 ide_atapi_cmd_ok(s); 849 break; 850 case 0x10: 851 /* normal read */ 852 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 853 break; 854 case 0xf8: 855 /* read all data */ 856 ide_atapi_cmd_read(s, lba, nb_sectors, 2352); 857 break; 858 default: 859 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 860 ASC_INV_FIELD_IN_CMD_PACKET); 861 break; 862 } 863 } 864 865 static void cmd_seek(IDEState *s, uint8_t* buf) 866 { 867 unsigned int lba; 868 uint64_t total_sectors = s->nb_sectors >> 2; 869 870 lba = ube32_to_cpu(buf + 2); 871 if (lba >= total_sectors) { 872 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR); 873 return; 874 } 875 876 ide_atapi_cmd_ok(s); 877 } 878 879 static void cmd_start_stop_unit(IDEState *s, uint8_t* buf) 880 { 881 int sense; 882 bool start = buf[4] & 1; 883 bool loej = buf[4] & 2; /* load on start, eject on !start */ 884 885 if (loej) { 886 if (!start && !s->tray_open && s->tray_locked) { 887 sense = bdrv_is_inserted(s->bs) 888 ? NOT_READY : ILLEGAL_REQUEST; 889 ide_atapi_cmd_error(s, sense, ASC_MEDIA_REMOVAL_PREVENTED); 890 return; 891 } 892 bdrv_eject(s->bs, !start); 893 s->tray_open = !start; 894 } 895 896 ide_atapi_cmd_ok(s); 897 } 898 899 static void cmd_mechanism_status(IDEState *s, uint8_t* buf) 900 { 901 int max_len = ube16_to_cpu(buf + 8); 902 903 cpu_to_ube16(buf, 0); 904 /* no current LBA */ 905 buf[2] = 0; 906 buf[3] = 0; 907 buf[4] = 0; 908 buf[5] = 1; 909 cpu_to_ube16(buf + 6, 0); 910 ide_atapi_cmd_reply(s, 8, max_len); 911 } 912 913 static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf) 914 { 915 int format, msf, start_track, len; 916 int max_len; 917 uint64_t total_sectors = s->nb_sectors >> 2; 918 919 max_len = ube16_to_cpu(buf + 7); 920 format = buf[9] >> 6; 921 msf = (buf[1] >> 1) & 1; 922 start_track = buf[6]; 923 924 switch(format) { 925 case 0: 926 len = cdrom_read_toc(total_sectors, buf, msf, start_track); 927 if (len < 0) 928 goto error_cmd; 929 ide_atapi_cmd_reply(s, len, max_len); 930 break; 931 case 1: 932 /* multi session : only a single session defined */ 933 memset(buf, 0, 12); 934 buf[1] = 0x0a; 935 buf[2] = 0x01; 936 buf[3] = 0x01; 937 ide_atapi_cmd_reply(s, 12, max_len); 938 break; 939 case 2: 940 len = cdrom_read_toc_raw(total_sectors, buf, msf, start_track); 941 if (len < 0) 942 goto error_cmd; 943 ide_atapi_cmd_reply(s, len, max_len); 944 break; 945 default: 946 error_cmd: 947 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 948 ASC_INV_FIELD_IN_CMD_PACKET); 949 } 950 } 951 952 static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf) 953 { 954 uint64_t total_sectors = s->nb_sectors >> 2; 955 956 /* NOTE: it is really the number of sectors minus 1 */ 957 cpu_to_ube32(buf, total_sectors - 1); 958 cpu_to_ube32(buf + 4, 2048); 959 ide_atapi_cmd_reply(s, 8, 8); 960 } 961 962 static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf) 963 { 964 int max_len; 965 int media = buf[1]; 966 int format = buf[7]; 967 int ret; 968 969 max_len = ube16_to_cpu(buf + 8); 970 971 if (format < 0xff) { 972 if (media_is_cd(s)) { 973 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 974 ASC_INCOMPATIBLE_FORMAT); 975 return; 976 } else if (!media_present(s)) { 977 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 978 ASC_INV_FIELD_IN_CMD_PACKET); 979 return; 980 } 981 } 982 983 memset(buf, 0, max_len > IDE_DMA_BUF_SECTORS * 512 + 4 ? 984 IDE_DMA_BUF_SECTORS * 512 + 4 : max_len); 985 986 switch (format) { 987 case 0x00 ... 0x7f: 988 case 0xff: 989 if (media == 0) { 990 ret = ide_dvd_read_structure(s, format, buf, buf); 991 992 if (ret < 0) { 993 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, -ret); 994 } else { 995 ide_atapi_cmd_reply(s, ret, max_len); 996 } 997 998 break; 999 } 1000 /* TODO: BD support, fall through for now */ 1001 1002 /* Generic disk structures */ 1003 case 0x80: /* TODO: AACS volume identifier */ 1004 case 0x81: /* TODO: AACS media serial number */ 1005 case 0x82: /* TODO: AACS media identifier */ 1006 case 0x83: /* TODO: AACS media key block */ 1007 case 0x90: /* TODO: List of recognized format layers */ 1008 case 0xc0: /* TODO: Write protection status */ 1009 default: 1010 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1011 ASC_INV_FIELD_IN_CMD_PACKET); 1012 break; 1013 } 1014 } 1015 1016 static void cmd_set_speed(IDEState *s, uint8_t* buf) 1017 { 1018 ide_atapi_cmd_ok(s); 1019 } 1020 1021 enum { 1022 /* 1023 * Only commands flagged as ALLOW_UA are allowed to run under a 1024 * unit attention condition. (See MMC-5, section 4.1.6.1) 1025 */ 1026 ALLOW_UA = 0x01, 1027 1028 /* 1029 * Commands flagged with CHECK_READY can only execute if a medium is present. 1030 * Otherwise they report the Not Ready Condition. (See MMC-5, section 1031 * 4.1.8) 1032 */ 1033 CHECK_READY = 0x02, 1034 }; 1035 1036 static const struct { 1037 void (*handler)(IDEState *s, uint8_t *buf); 1038 int flags; 1039 } atapi_cmd_table[0x100] = { 1040 [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY }, 1041 [ 0x03 ] = { cmd_request_sense, ALLOW_UA }, 1042 [ 0x12 ] = { cmd_inquiry, ALLOW_UA }, 1043 [ 0x1b ] = { cmd_start_stop_unit, 0 }, /* [1] */ 1044 [ 0x1e ] = { cmd_prevent_allow_medium_removal, 0 }, 1045 [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY }, 1046 [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY }, 1047 [ 0x2b ] = { cmd_seek, CHECK_READY }, 1048 [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY }, 1049 [ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, 1050 [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, 1051 [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, 1052 [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY }, 1053 [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY }, 1054 [ 0xbb ] = { cmd_set_speed, 0 }, 1055 [ 0xbd ] = { cmd_mechanism_status, 0 }, 1056 [ 0xbe ] = { cmd_read_cd, CHECK_READY }, 1057 /* [1] handler detects and reports not ready condition itself */ 1058 }; 1059 1060 void ide_atapi_cmd(IDEState *s) 1061 { 1062 uint8_t *buf; 1063 1064 buf = s->io_buffer; 1065 #ifdef DEBUG_IDE_ATAPI 1066 { 1067 int i; 1068 printf("ATAPI limit=0x%x packet:", s->lcyl | (s->hcyl << 8)); 1069 for(i = 0; i < ATAPI_PACKET_SIZE; i++) { 1070 printf(" %02x", buf[i]); 1071 } 1072 printf("\n"); 1073 } 1074 #endif 1075 /* 1076 * If there's a UNIT_ATTENTION condition pending, only command flagged with 1077 * ALLOW_UA are allowed to complete. with other commands getting a CHECK 1078 * condition response unless a higher priority status, defined by the drive 1079 * here, is pending. 1080 */ 1081 if (s->sense_key == UNIT_ATTENTION && 1082 !(atapi_cmd_table[s->io_buffer[0]].flags & ALLOW_UA)) { 1083 ide_atapi_cmd_check_status(s); 1084 return; 1085 } 1086 /* 1087 * When a CD gets changed, we have to report an ejected state and 1088 * then a loaded state to guests so that they detect tray 1089 * open/close and media change events. Guests that do not use 1090 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close 1091 * states rely on this behavior. 1092 */ 1093 if (!s->tray_open && bdrv_is_inserted(s->bs) && s->cdrom_changed) { 1094 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1095 1096 s->cdrom_changed = 0; 1097 s->sense_key = UNIT_ATTENTION; 1098 s->asc = ASC_MEDIUM_MAY_HAVE_CHANGED; 1099 return; 1100 } 1101 1102 /* Report a Not Ready condition if appropriate for the command */ 1103 if ((atapi_cmd_table[s->io_buffer[0]].flags & CHECK_READY) && 1104 (!media_present(s) || !bdrv_is_inserted(s->bs))) 1105 { 1106 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1107 return; 1108 } 1109 1110 /* Execute the command */ 1111 if (atapi_cmd_table[s->io_buffer[0]].handler) { 1112 atapi_cmd_table[s->io_buffer[0]].handler(s, buf); 1113 return; 1114 } 1115 1116 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE); 1117 } 1118