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 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 return; 356 357 eot: 358 bdrv_acct_done(s->bs, &s->acct); 359 s->bus->dma->ops->add_status(s->bus->dma, BM_STATUS_INT); 360 ide_set_inactive(s); 361 } 362 363 /* start a CD-CDROM read command with DMA */ 364 /* XXX: test if DMA is available */ 365 static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors, 366 int sector_size) 367 { 368 s->lba = lba; 369 s->packet_transfer_size = nb_sectors * sector_size; 370 s->io_buffer_index = 0; 371 s->io_buffer_size = 0; 372 s->cd_sector_size = sector_size; 373 374 bdrv_acct_start(s->bs, &s->acct, s->packet_transfer_size, BDRV_ACCT_READ); 375 376 /* XXX: check if BUSY_STAT should be set */ 377 s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT; 378 s->bus->dma->ops->start_dma(s->bus->dma, s, 379 ide_atapi_cmd_read_dma_cb); 380 } 381 382 static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors, 383 int sector_size) 384 { 385 #ifdef DEBUG_IDE_ATAPI 386 printf("read %s: LBA=%d nb_sectors=%d\n", s->atapi_dma ? "dma" : "pio", 387 lba, nb_sectors); 388 #endif 389 if (s->atapi_dma) { 390 ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size); 391 } else { 392 ide_atapi_cmd_read_pio(s, lba, nb_sectors, sector_size); 393 } 394 } 395 396 static inline uint8_t ide_atapi_set_profile(uint8_t *buf, uint8_t *index, 397 uint16_t profile) 398 { 399 uint8_t *buf_profile = buf + 12; /* start of profiles */ 400 401 buf_profile += ((*index) * 4); /* start of indexed profile */ 402 cpu_to_ube16 (buf_profile, profile); 403 buf_profile[2] = ((buf_profile[0] == buf[6]) && (buf_profile[1] == buf[7])); 404 405 /* each profile adds 4 bytes to the response */ 406 (*index)++; 407 buf[11] += 4; /* Additional Length */ 408 409 return 4; 410 } 411 412 static int ide_dvd_read_structure(IDEState *s, int format, 413 const uint8_t *packet, uint8_t *buf) 414 { 415 switch (format) { 416 case 0x0: /* Physical format information */ 417 { 418 int layer = packet[6]; 419 uint64_t total_sectors; 420 421 if (layer != 0) 422 return -ASC_INV_FIELD_IN_CMD_PACKET; 423 424 total_sectors = s->nb_sectors >> 2; 425 if (total_sectors == 0) { 426 return -ASC_MEDIUM_NOT_PRESENT; 427 } 428 429 buf[4] = 1; /* DVD-ROM, part version 1 */ 430 buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ 431 buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ 432 buf[7] = 0; /* default densities */ 433 434 /* FIXME: 0x30000 per spec? */ 435 cpu_to_ube32(buf + 8, 0); /* start sector */ 436 cpu_to_ube32(buf + 12, total_sectors - 1); /* end sector */ 437 cpu_to_ube32(buf + 16, total_sectors - 1); /* l0 end sector */ 438 439 /* Size of buffer, not including 2 byte size field */ 440 stw_be_p(buf, 2048 + 2); 441 442 /* 2k data + 4 byte header */ 443 return (2048 + 4); 444 } 445 446 case 0x01: /* DVD copyright information */ 447 buf[4] = 0; /* no copyright data */ 448 buf[5] = 0; /* no region restrictions */ 449 450 /* Size of buffer, not including 2 byte size field */ 451 stw_be_p(buf, 4 + 2); 452 453 /* 4 byte header + 4 byte data */ 454 return (4 + 4); 455 456 case 0x03: /* BCA information - invalid field for no BCA info */ 457 return -ASC_INV_FIELD_IN_CMD_PACKET; 458 459 case 0x04: /* DVD disc manufacturing information */ 460 /* Size of buffer, not including 2 byte size field */ 461 stw_be_p(buf, 2048 + 2); 462 463 /* 2k data + 4 byte header */ 464 return (2048 + 4); 465 466 case 0xff: 467 /* 468 * This lists all the command capabilities above. Add new ones 469 * in order and update the length and buffer return values. 470 */ 471 472 buf[4] = 0x00; /* Physical format */ 473 buf[5] = 0x40; /* Not writable, is readable */ 474 stw_be_p(buf + 6, 2048 + 4); 475 476 buf[8] = 0x01; /* Copyright info */ 477 buf[9] = 0x40; /* Not writable, is readable */ 478 stw_be_p(buf + 10, 4 + 4); 479 480 buf[12] = 0x03; /* BCA info */ 481 buf[13] = 0x40; /* Not writable, is readable */ 482 stw_be_p(buf + 14, 188 + 4); 483 484 buf[16] = 0x04; /* Manufacturing info */ 485 buf[17] = 0x40; /* Not writable, is readable */ 486 stw_be_p(buf + 18, 2048 + 4); 487 488 /* Size of buffer, not including 2 byte size field */ 489 stw_be_p(buf, 16 + 2); 490 491 /* data written + 4 byte header */ 492 return (16 + 4); 493 494 default: /* TODO: formats beyond DVD-ROM requires */ 495 return -ASC_INV_FIELD_IN_CMD_PACKET; 496 } 497 } 498 499 static unsigned int event_status_media(IDEState *s, 500 uint8_t *buf) 501 { 502 uint8_t event_code, media_status; 503 504 media_status = 0; 505 if (s->tray_open) { 506 media_status = MS_TRAY_OPEN; 507 } else if (bdrv_is_inserted(s->bs)) { 508 media_status = MS_MEDIA_PRESENT; 509 } 510 511 /* Event notification descriptor */ 512 event_code = MEC_NO_CHANGE; 513 if (media_status != MS_TRAY_OPEN) { 514 if (s->events.new_media) { 515 event_code = MEC_NEW_MEDIA; 516 s->events.new_media = false; 517 } else if (s->events.eject_request) { 518 event_code = MEC_EJECT_REQUESTED; 519 s->events.eject_request = false; 520 } 521 } 522 523 buf[4] = event_code; 524 buf[5] = media_status; 525 526 /* These fields are reserved, just clear them. */ 527 buf[6] = 0; 528 buf[7] = 0; 529 530 return 8; /* We wrote to 4 extra bytes from the header */ 531 } 532 533 static void cmd_get_event_status_notification(IDEState *s, 534 uint8_t *buf) 535 { 536 const uint8_t *packet = buf; 537 538 struct { 539 uint8_t opcode; 540 uint8_t polled; /* lsb bit is polled; others are reserved */ 541 uint8_t reserved2[2]; 542 uint8_t class; 543 uint8_t reserved3[2]; 544 uint16_t len; 545 uint8_t control; 546 } QEMU_PACKED *gesn_cdb; 547 548 struct { 549 uint16_t len; 550 uint8_t notification_class; 551 uint8_t supported_events; 552 } QEMU_PACKED *gesn_event_header; 553 unsigned int max_len, used_len; 554 555 gesn_cdb = (void *)packet; 556 gesn_event_header = (void *)buf; 557 558 max_len = be16_to_cpu(gesn_cdb->len); 559 560 /* It is fine by the MMC spec to not support async mode operations */ 561 if (!(gesn_cdb->polled & 0x01)) { /* asynchronous mode */ 562 /* Only polling is supported, asynchronous mode is not. */ 563 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 564 ASC_INV_FIELD_IN_CMD_PACKET); 565 return; 566 } 567 568 /* polling mode operation */ 569 570 /* 571 * These are the supported events. 572 * 573 * We currently only support requests of the 'media' type. 574 * Notification class requests and supported event classes are bitmasks, 575 * but they are build from the same values as the "notification class" 576 * field. 577 */ 578 gesn_event_header->supported_events = 1 << GESN_MEDIA; 579 580 /* 581 * We use |= below to set the class field; other bits in this byte 582 * are reserved now but this is useful to do if we have to use the 583 * reserved fields later. 584 */ 585 gesn_event_header->notification_class = 0; 586 587 /* 588 * Responses to requests are to be based on request priority. The 589 * notification_class_request_type enum above specifies the 590 * priority: upper elements are higher prio than lower ones. 591 */ 592 if (gesn_cdb->class & (1 << GESN_MEDIA)) { 593 gesn_event_header->notification_class |= GESN_MEDIA; 594 used_len = event_status_media(s, buf); 595 } else { 596 gesn_event_header->notification_class = 0x80; /* No event available */ 597 used_len = sizeof(*gesn_event_header); 598 } 599 gesn_event_header->len = cpu_to_be16(used_len 600 - sizeof(*gesn_event_header)); 601 ide_atapi_cmd_reply(s, used_len, max_len); 602 } 603 604 static void cmd_request_sense(IDEState *s, uint8_t *buf) 605 { 606 int max_len = buf[4]; 607 608 memset(buf, 0, 18); 609 buf[0] = 0x70 | (1 << 7); 610 buf[2] = s->sense_key; 611 buf[7] = 10; 612 buf[12] = s->asc; 613 614 if (s->sense_key == UNIT_ATTENTION) { 615 s->sense_key = NO_SENSE; 616 } 617 618 ide_atapi_cmd_reply(s, 18, max_len); 619 } 620 621 static void cmd_inquiry(IDEState *s, uint8_t *buf) 622 { 623 int max_len = buf[4]; 624 625 buf[0] = 0x05; /* CD-ROM */ 626 buf[1] = 0x80; /* removable */ 627 buf[2] = 0x00; /* ISO */ 628 buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */ 629 buf[4] = 31; /* additional length */ 630 buf[5] = 0; /* reserved */ 631 buf[6] = 0; /* reserved */ 632 buf[7] = 0; /* reserved */ 633 padstr8(buf + 8, 8, "QEMU"); 634 padstr8(buf + 16, 16, "QEMU DVD-ROM"); 635 padstr8(buf + 32, 4, s->version); 636 ide_atapi_cmd_reply(s, 36, max_len); 637 } 638 639 static void cmd_get_configuration(IDEState *s, uint8_t *buf) 640 { 641 uint32_t len; 642 uint8_t index = 0; 643 int max_len; 644 645 /* only feature 0 is supported */ 646 if (buf[2] != 0 || buf[3] != 0) { 647 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 648 ASC_INV_FIELD_IN_CMD_PACKET); 649 return; 650 } 651 652 /* XXX: could result in alignment problems in some architectures */ 653 max_len = ube16_to_cpu(buf + 7); 654 655 /* 656 * XXX: avoid overflow for io_buffer if max_len is bigger than 657 * the size of that buffer (dimensioned to max number of 658 * sectors to transfer at once) 659 * 660 * Only a problem if the feature/profiles grow. 661 */ 662 if (max_len > 512) { 663 /* XXX: assume 1 sector */ 664 max_len = 512; 665 } 666 667 memset(buf, 0, max_len); 668 /* 669 * the number of sectors from the media tells us which profile 670 * to use as current. 0 means there is no media 671 */ 672 if (media_is_dvd(s)) { 673 cpu_to_ube16(buf + 6, MMC_PROFILE_DVD_ROM); 674 } else if (media_is_cd(s)) { 675 cpu_to_ube16(buf + 6, MMC_PROFILE_CD_ROM); 676 } 677 678 buf[10] = 0x02 | 0x01; /* persistent and current */ 679 len = 12; /* headers: 8 + 4 */ 680 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_DVD_ROM); 681 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_CD_ROM); 682 cpu_to_ube32(buf, len - 4); /* data length */ 683 684 ide_atapi_cmd_reply(s, len, max_len); 685 } 686 687 static void cmd_mode_sense(IDEState *s, uint8_t *buf) 688 { 689 int action, code; 690 int max_len; 691 692 max_len = ube16_to_cpu(buf + 7); 693 action = buf[2] >> 6; 694 code = buf[2] & 0x3f; 695 696 switch(action) { 697 case 0: /* current values */ 698 switch(code) { 699 case MODE_PAGE_R_W_ERROR: /* error recovery */ 700 cpu_to_ube16(&buf[0], 16 - 2); 701 buf[2] = 0x70; 702 buf[3] = 0; 703 buf[4] = 0; 704 buf[5] = 0; 705 buf[6] = 0; 706 buf[7] = 0; 707 708 buf[8] = MODE_PAGE_R_W_ERROR; 709 buf[9] = 16 - 10; 710 buf[10] = 0x00; 711 buf[11] = 0x05; 712 buf[12] = 0x00; 713 buf[13] = 0x00; 714 buf[14] = 0x00; 715 buf[15] = 0x00; 716 ide_atapi_cmd_reply(s, 16, max_len); 717 break; 718 case MODE_PAGE_AUDIO_CTL: 719 cpu_to_ube16(&buf[0], 24 - 2); 720 buf[2] = 0x70; 721 buf[3] = 0; 722 buf[4] = 0; 723 buf[5] = 0; 724 buf[6] = 0; 725 buf[7] = 0; 726 727 buf[8] = MODE_PAGE_AUDIO_CTL; 728 buf[9] = 24 - 10; 729 /* Fill with CDROM audio volume */ 730 buf[17] = 0; 731 buf[19] = 0; 732 buf[21] = 0; 733 buf[23] = 0; 734 735 ide_atapi_cmd_reply(s, 24, max_len); 736 break; 737 case MODE_PAGE_CAPABILITIES: 738 cpu_to_ube16(&buf[0], 30 - 2); 739 buf[2] = 0x70; 740 buf[3] = 0; 741 buf[4] = 0; 742 buf[5] = 0; 743 buf[6] = 0; 744 buf[7] = 0; 745 746 buf[8] = MODE_PAGE_CAPABILITIES; 747 buf[9] = 30 - 10; 748 buf[10] = 0x3b; /* read CDR/CDRW/DVDROM/DVDR/DVDRAM */ 749 buf[11] = 0x00; 750 751 /* Claim PLAY_AUDIO capability (0x01) since some Linux 752 code checks for this to automount media. */ 753 buf[12] = 0x71; 754 buf[13] = 3 << 5; 755 buf[14] = (1 << 0) | (1 << 3) | (1 << 5); 756 if (s->tray_locked) { 757 buf[14] |= 1 << 1; 758 } 759 buf[15] = 0x00; /* No volume & mute control, no changer */ 760 cpu_to_ube16(&buf[16], 704); /* 4x read speed */ 761 buf[18] = 0; /* Two volume levels */ 762 buf[19] = 2; 763 cpu_to_ube16(&buf[20], 512); /* 512k buffer */ 764 cpu_to_ube16(&buf[22], 704); /* 4x read speed current */ 765 buf[24] = 0; 766 buf[25] = 0; 767 buf[26] = 0; 768 buf[27] = 0; 769 buf[28] = 0; 770 buf[29] = 0; 771 ide_atapi_cmd_reply(s, 30, max_len); 772 break; 773 default: 774 goto error_cmd; 775 } 776 break; 777 case 1: /* changeable values */ 778 goto error_cmd; 779 case 2: /* default values */ 780 goto error_cmd; 781 default: 782 case 3: /* saved values */ 783 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 784 ASC_SAVING_PARAMETERS_NOT_SUPPORTED); 785 break; 786 } 787 return; 788 789 error_cmd: 790 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET); 791 } 792 793 static void cmd_test_unit_ready(IDEState *s, uint8_t *buf) 794 { 795 /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we 796 * come here, we know that it's ready. */ 797 ide_atapi_cmd_ok(s); 798 } 799 800 static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf) 801 { 802 s->tray_locked = buf[4] & 1; 803 bdrv_lock_medium(s->bs, buf[4] & 1); 804 ide_atapi_cmd_ok(s); 805 } 806 807 static void cmd_read(IDEState *s, uint8_t* buf) 808 { 809 int nb_sectors, lba; 810 811 if (buf[0] == GPCMD_READ_10) { 812 nb_sectors = ube16_to_cpu(buf + 7); 813 } else { 814 nb_sectors = ube32_to_cpu(buf + 6); 815 } 816 817 lba = ube32_to_cpu(buf + 2); 818 if (nb_sectors == 0) { 819 ide_atapi_cmd_ok(s); 820 return; 821 } 822 823 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 824 } 825 826 static void cmd_read_cd(IDEState *s, uint8_t* buf) 827 { 828 int nb_sectors, lba, transfer_request; 829 830 nb_sectors = (buf[6] << 16) | (buf[7] << 8) | buf[8]; 831 lba = ube32_to_cpu(buf + 2); 832 833 if (nb_sectors == 0) { 834 ide_atapi_cmd_ok(s); 835 return; 836 } 837 838 transfer_request = buf[9]; 839 switch(transfer_request & 0xf8) { 840 case 0x00: 841 /* nothing */ 842 ide_atapi_cmd_ok(s); 843 break; 844 case 0x10: 845 /* normal read */ 846 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 847 break; 848 case 0xf8: 849 /* read all data */ 850 ide_atapi_cmd_read(s, lba, nb_sectors, 2352); 851 break; 852 default: 853 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 854 ASC_INV_FIELD_IN_CMD_PACKET); 855 break; 856 } 857 } 858 859 static void cmd_seek(IDEState *s, uint8_t* buf) 860 { 861 unsigned int lba; 862 uint64_t total_sectors = s->nb_sectors >> 2; 863 864 lba = ube32_to_cpu(buf + 2); 865 if (lba >= total_sectors) { 866 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR); 867 return; 868 } 869 870 ide_atapi_cmd_ok(s); 871 } 872 873 static void cmd_start_stop_unit(IDEState *s, uint8_t* buf) 874 { 875 int sense; 876 bool start = buf[4] & 1; 877 bool loej = buf[4] & 2; /* load on start, eject on !start */ 878 int pwrcnd = buf[4] & 0xf0; 879 880 if (pwrcnd) { 881 /* eject/load only happens for power condition == 0 */ 882 return; 883 } 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 } 892 893 if (s->tray_open != !start) { 894 bdrv_eject(s->bs, !start); 895 s->tray_open = !start; 896 } 897 } 898 899 ide_atapi_cmd_ok(s); 900 } 901 902 static void cmd_mechanism_status(IDEState *s, uint8_t* buf) 903 { 904 int max_len = ube16_to_cpu(buf + 8); 905 906 cpu_to_ube16(buf, 0); 907 /* no current LBA */ 908 buf[2] = 0; 909 buf[3] = 0; 910 buf[4] = 0; 911 buf[5] = 1; 912 cpu_to_ube16(buf + 6, 0); 913 ide_atapi_cmd_reply(s, 8, max_len); 914 } 915 916 static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf) 917 { 918 int format, msf, start_track, len; 919 int max_len; 920 uint64_t total_sectors = s->nb_sectors >> 2; 921 922 max_len = ube16_to_cpu(buf + 7); 923 format = buf[9] >> 6; 924 msf = (buf[1] >> 1) & 1; 925 start_track = buf[6]; 926 927 switch(format) { 928 case 0: 929 len = cdrom_read_toc(total_sectors, buf, msf, start_track); 930 if (len < 0) 931 goto error_cmd; 932 ide_atapi_cmd_reply(s, len, max_len); 933 break; 934 case 1: 935 /* multi session : only a single session defined */ 936 memset(buf, 0, 12); 937 buf[1] = 0x0a; 938 buf[2] = 0x01; 939 buf[3] = 0x01; 940 ide_atapi_cmd_reply(s, 12, max_len); 941 break; 942 case 2: 943 len = cdrom_read_toc_raw(total_sectors, buf, msf, start_track); 944 if (len < 0) 945 goto error_cmd; 946 ide_atapi_cmd_reply(s, len, max_len); 947 break; 948 default: 949 error_cmd: 950 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 951 ASC_INV_FIELD_IN_CMD_PACKET); 952 } 953 } 954 955 static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf) 956 { 957 uint64_t total_sectors = s->nb_sectors >> 2; 958 959 /* NOTE: it is really the number of sectors minus 1 */ 960 cpu_to_ube32(buf, total_sectors - 1); 961 cpu_to_ube32(buf + 4, 2048); 962 ide_atapi_cmd_reply(s, 8, 8); 963 } 964 965 static void cmd_read_disc_information(IDEState *s, uint8_t* buf) 966 { 967 uint8_t type = buf[1] & 7; 968 uint32_t max_len = ube16_to_cpu(buf + 7); 969 970 /* Types 1/2 are only defined for Blu-Ray. */ 971 if (type != 0) { 972 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 973 ASC_INV_FIELD_IN_CMD_PACKET); 974 return; 975 } 976 977 memset(buf, 0, 34); 978 buf[1] = 32; 979 buf[2] = 0xe; /* last session complete, disc finalized */ 980 buf[3] = 1; /* first track on disc */ 981 buf[4] = 1; /* # of sessions */ 982 buf[5] = 1; /* first track of last session */ 983 buf[6] = 1; /* last track of last session */ 984 buf[7] = 0x20; /* unrestricted use */ 985 buf[8] = 0x00; /* CD-ROM or DVD-ROM */ 986 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */ 987 /* 12-23: not meaningful for CD-ROM or DVD-ROM */ 988 /* 24-31: disc bar code */ 989 /* 32: disc application code */ 990 /* 33: number of OPC tables */ 991 992 ide_atapi_cmd_reply(s, 34, max_len); 993 } 994 995 static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf) 996 { 997 int max_len; 998 int media = buf[1]; 999 int format = buf[7]; 1000 int ret; 1001 1002 max_len = ube16_to_cpu(buf + 8); 1003 1004 if (format < 0xff) { 1005 if (media_is_cd(s)) { 1006 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1007 ASC_INCOMPATIBLE_FORMAT); 1008 return; 1009 } else if (!media_present(s)) { 1010 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1011 ASC_INV_FIELD_IN_CMD_PACKET); 1012 return; 1013 } 1014 } 1015 1016 memset(buf, 0, max_len > IDE_DMA_BUF_SECTORS * 512 + 4 ? 1017 IDE_DMA_BUF_SECTORS * 512 + 4 : max_len); 1018 1019 switch (format) { 1020 case 0x00 ... 0x7f: 1021 case 0xff: 1022 if (media == 0) { 1023 ret = ide_dvd_read_structure(s, format, buf, buf); 1024 1025 if (ret < 0) { 1026 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, -ret); 1027 } else { 1028 ide_atapi_cmd_reply(s, ret, max_len); 1029 } 1030 1031 break; 1032 } 1033 /* TODO: BD support, fall through for now */ 1034 1035 /* Generic disk structures */ 1036 case 0x80: /* TODO: AACS volume identifier */ 1037 case 0x81: /* TODO: AACS media serial number */ 1038 case 0x82: /* TODO: AACS media identifier */ 1039 case 0x83: /* TODO: AACS media key block */ 1040 case 0x90: /* TODO: List of recognized format layers */ 1041 case 0xc0: /* TODO: Write protection status */ 1042 default: 1043 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1044 ASC_INV_FIELD_IN_CMD_PACKET); 1045 break; 1046 } 1047 } 1048 1049 static void cmd_set_speed(IDEState *s, uint8_t* buf) 1050 { 1051 ide_atapi_cmd_ok(s); 1052 } 1053 1054 enum { 1055 /* 1056 * Only commands flagged as ALLOW_UA are allowed to run under a 1057 * unit attention condition. (See MMC-5, section 4.1.6.1) 1058 */ 1059 ALLOW_UA = 0x01, 1060 1061 /* 1062 * Commands flagged with CHECK_READY can only execute if a medium is present. 1063 * Otherwise they report the Not Ready Condition. (See MMC-5, section 1064 * 4.1.8) 1065 */ 1066 CHECK_READY = 0x02, 1067 }; 1068 1069 static const struct { 1070 void (*handler)(IDEState *s, uint8_t *buf); 1071 int flags; 1072 } atapi_cmd_table[0x100] = { 1073 [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY }, 1074 [ 0x03 ] = { cmd_request_sense, ALLOW_UA }, 1075 [ 0x12 ] = { cmd_inquiry, ALLOW_UA }, 1076 [ 0x1b ] = { cmd_start_stop_unit, 0 }, /* [1] */ 1077 [ 0x1e ] = { cmd_prevent_allow_medium_removal, 0 }, 1078 [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY }, 1079 [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY }, 1080 [ 0x2b ] = { cmd_seek, CHECK_READY }, 1081 [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY }, 1082 [ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, 1083 [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, 1084 [ 0x51 ] = { cmd_read_disc_information, CHECK_READY }, 1085 [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, 1086 [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY }, 1087 [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY }, 1088 [ 0xbb ] = { cmd_set_speed, 0 }, 1089 [ 0xbd ] = { cmd_mechanism_status, 0 }, 1090 [ 0xbe ] = { cmd_read_cd, CHECK_READY }, 1091 /* [1] handler detects and reports not ready condition itself */ 1092 }; 1093 1094 void ide_atapi_cmd(IDEState *s) 1095 { 1096 uint8_t *buf; 1097 1098 buf = s->io_buffer; 1099 #ifdef DEBUG_IDE_ATAPI 1100 { 1101 int i; 1102 printf("ATAPI limit=0x%x packet:", s->lcyl | (s->hcyl << 8)); 1103 for(i = 0; i < ATAPI_PACKET_SIZE; i++) { 1104 printf(" %02x", buf[i]); 1105 } 1106 printf("\n"); 1107 } 1108 #endif 1109 /* 1110 * If there's a UNIT_ATTENTION condition pending, only command flagged with 1111 * ALLOW_UA are allowed to complete. with other commands getting a CHECK 1112 * condition response unless a higher priority status, defined by the drive 1113 * here, is pending. 1114 */ 1115 if (s->sense_key == UNIT_ATTENTION && 1116 !(atapi_cmd_table[s->io_buffer[0]].flags & ALLOW_UA)) { 1117 ide_atapi_cmd_check_status(s); 1118 return; 1119 } 1120 /* 1121 * When a CD gets changed, we have to report an ejected state and 1122 * then a loaded state to guests so that they detect tray 1123 * open/close and media change events. Guests that do not use 1124 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close 1125 * states rely on this behavior. 1126 */ 1127 if (!(atapi_cmd_table[s->io_buffer[0]].flags & ALLOW_UA) && 1128 !s->tray_open && bdrv_is_inserted(s->bs) && s->cdrom_changed) { 1129 1130 if (s->cdrom_changed == 1) { 1131 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1132 s->cdrom_changed = 2; 1133 } else { 1134 ide_atapi_cmd_error(s, UNIT_ATTENTION, ASC_MEDIUM_MAY_HAVE_CHANGED); 1135 s->cdrom_changed = 0; 1136 } 1137 1138 return; 1139 } 1140 1141 /* Report a Not Ready condition if appropriate for the command */ 1142 if ((atapi_cmd_table[s->io_buffer[0]].flags & CHECK_READY) && 1143 (!media_present(s) || !bdrv_is_inserted(s->bs))) 1144 { 1145 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1146 return; 1147 } 1148 1149 /* Execute the command */ 1150 if (atapi_cmd_table[s->io_buffer[0]].handler) { 1151 atapi_cmd_table[s->io_buffer[0]].handler(s, buf); 1152 return; 1153 } 1154 1155 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE); 1156 } 1157