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 uint8_t page_code = buf[2]; 625 int max_len = buf[4]; 626 627 unsigned idx = 0; 628 unsigned size_idx; 629 unsigned preamble_len; 630 631 /* If the EVPD (Enable Vital Product Data) bit is set in byte 1, 632 * we are being asked for a specific page of info indicated by byte 2. */ 633 if (buf[1] & 0x01) { 634 preamble_len = 4; 635 size_idx = 3; 636 637 buf[idx++] = 0x05; /* CD-ROM */ 638 buf[idx++] = page_code; /* Page Code */ 639 buf[idx++] = 0x00; /* reserved */ 640 idx++; /* length (set later) */ 641 642 switch (page_code) { 643 case 0x00: 644 /* Supported Pages: List of supported VPD responses. */ 645 buf[idx++] = 0x00; /* 0x00: Supported Pages, and: */ 646 buf[idx++] = 0x83; /* 0x83: Device Identification. */ 647 break; 648 649 case 0x83: 650 /* Device Identification. Each entry is optional, but the entries 651 * included here are modeled after libata's VPD responses. 652 * If the response is given, at least one entry must be present. */ 653 654 /* Entry 1: Serial */ 655 if (idx + 24 > max_len) { 656 /* Not enough room for even the first entry: */ 657 /* 4 byte header + 20 byte string */ 658 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 659 ASC_DATA_PHASE_ERROR); 660 return; 661 } 662 buf[idx++] = 0x02; /* Ascii */ 663 buf[idx++] = 0x00; /* Vendor Specific */ 664 buf[idx++] = 0x00; 665 buf[idx++] = 20; /* Remaining length */ 666 padstr8(buf + idx, 20, s->drive_serial_str); 667 idx += 20; 668 669 /* Entry 2: Drive Model and Serial */ 670 if (idx + 72 > max_len) { 671 /* 4 (header) + 8 (vendor) + 60 (model & serial) */ 672 goto out; 673 } 674 buf[idx++] = 0x02; /* Ascii */ 675 buf[idx++] = 0x01; /* T10 Vendor */ 676 buf[idx++] = 0x00; 677 buf[idx++] = 68; 678 padstr8(buf + idx, 8, "ATA"); /* Generic T10 vendor */ 679 idx += 8; 680 padstr8(buf + idx, 40, s->drive_model_str); 681 idx += 40; 682 padstr8(buf + idx, 20, s->drive_serial_str); 683 idx += 20; 684 685 /* Entry 3: WWN */ 686 if (s->wwn && (idx + 12 <= max_len)) { 687 /* 4 byte header + 8 byte wwn */ 688 buf[idx++] = 0x01; /* Binary */ 689 buf[idx++] = 0x03; /* NAA */ 690 buf[idx++] = 0x00; 691 buf[idx++] = 0x08; 692 stq_be_p(&buf[idx], s->wwn); 693 idx += 8; 694 } 695 break; 696 697 default: 698 /* SPC-3, revision 23 sec. 6.4 */ 699 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 700 ASC_INV_FIELD_IN_CMD_PACKET); 701 return; 702 } 703 } else { 704 preamble_len = 5; 705 size_idx = 4; 706 707 buf[0] = 0x05; /* CD-ROM */ 708 buf[1] = 0x80; /* removable */ 709 buf[2] = 0x00; /* ISO */ 710 buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */ 711 /* buf[size_idx] set below. */ 712 buf[5] = 0; /* reserved */ 713 buf[6] = 0; /* reserved */ 714 buf[7] = 0; /* reserved */ 715 padstr8(buf + 8, 8, "QEMU"); 716 padstr8(buf + 16, 16, "QEMU DVD-ROM"); 717 padstr8(buf + 32, 4, s->version); 718 idx = 36; 719 } 720 721 out: 722 buf[size_idx] = idx - preamble_len; 723 ide_atapi_cmd_reply(s, idx, max_len); 724 return; 725 } 726 727 static void cmd_get_configuration(IDEState *s, uint8_t *buf) 728 { 729 uint32_t len; 730 uint8_t index = 0; 731 int max_len; 732 733 /* only feature 0 is supported */ 734 if (buf[2] != 0 || buf[3] != 0) { 735 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 736 ASC_INV_FIELD_IN_CMD_PACKET); 737 return; 738 } 739 740 /* XXX: could result in alignment problems in some architectures */ 741 max_len = ube16_to_cpu(buf + 7); 742 743 /* 744 * XXX: avoid overflow for io_buffer if max_len is bigger than 745 * the size of that buffer (dimensioned to max number of 746 * sectors to transfer at once) 747 * 748 * Only a problem if the feature/profiles grow. 749 */ 750 if (max_len > 512) { 751 /* XXX: assume 1 sector */ 752 max_len = 512; 753 } 754 755 memset(buf, 0, max_len); 756 /* 757 * the number of sectors from the media tells us which profile 758 * to use as current. 0 means there is no media 759 */ 760 if (media_is_dvd(s)) { 761 cpu_to_ube16(buf + 6, MMC_PROFILE_DVD_ROM); 762 } else if (media_is_cd(s)) { 763 cpu_to_ube16(buf + 6, MMC_PROFILE_CD_ROM); 764 } 765 766 buf[10] = 0x02 | 0x01; /* persistent and current */ 767 len = 12; /* headers: 8 + 4 */ 768 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_DVD_ROM); 769 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_CD_ROM); 770 cpu_to_ube32(buf, len - 4); /* data length */ 771 772 ide_atapi_cmd_reply(s, len, max_len); 773 } 774 775 static void cmd_mode_sense(IDEState *s, uint8_t *buf) 776 { 777 int action, code; 778 int max_len; 779 780 max_len = ube16_to_cpu(buf + 7); 781 action = buf[2] >> 6; 782 code = buf[2] & 0x3f; 783 784 switch(action) { 785 case 0: /* current values */ 786 switch(code) { 787 case MODE_PAGE_R_W_ERROR: /* error recovery */ 788 cpu_to_ube16(&buf[0], 16 - 2); 789 buf[2] = 0x70; 790 buf[3] = 0; 791 buf[4] = 0; 792 buf[5] = 0; 793 buf[6] = 0; 794 buf[7] = 0; 795 796 buf[8] = MODE_PAGE_R_W_ERROR; 797 buf[9] = 16 - 10; 798 buf[10] = 0x00; 799 buf[11] = 0x05; 800 buf[12] = 0x00; 801 buf[13] = 0x00; 802 buf[14] = 0x00; 803 buf[15] = 0x00; 804 ide_atapi_cmd_reply(s, 16, max_len); 805 break; 806 case MODE_PAGE_AUDIO_CTL: 807 cpu_to_ube16(&buf[0], 24 - 2); 808 buf[2] = 0x70; 809 buf[3] = 0; 810 buf[4] = 0; 811 buf[5] = 0; 812 buf[6] = 0; 813 buf[7] = 0; 814 815 buf[8] = MODE_PAGE_AUDIO_CTL; 816 buf[9] = 24 - 10; 817 /* Fill with CDROM audio volume */ 818 buf[17] = 0; 819 buf[19] = 0; 820 buf[21] = 0; 821 buf[23] = 0; 822 823 ide_atapi_cmd_reply(s, 24, max_len); 824 break; 825 case MODE_PAGE_CAPABILITIES: 826 cpu_to_ube16(&buf[0], 30 - 2); 827 buf[2] = 0x70; 828 buf[3] = 0; 829 buf[4] = 0; 830 buf[5] = 0; 831 buf[6] = 0; 832 buf[7] = 0; 833 834 buf[8] = MODE_PAGE_CAPABILITIES; 835 buf[9] = 30 - 10; 836 buf[10] = 0x3b; /* read CDR/CDRW/DVDROM/DVDR/DVDRAM */ 837 buf[11] = 0x00; 838 839 /* Claim PLAY_AUDIO capability (0x01) since some Linux 840 code checks for this to automount media. */ 841 buf[12] = 0x71; 842 buf[13] = 3 << 5; 843 buf[14] = (1 << 0) | (1 << 3) | (1 << 5); 844 if (s->tray_locked) { 845 buf[14] |= 1 << 1; 846 } 847 buf[15] = 0x00; /* No volume & mute control, no changer */ 848 cpu_to_ube16(&buf[16], 704); /* 4x read speed */ 849 buf[18] = 0; /* Two volume levels */ 850 buf[19] = 2; 851 cpu_to_ube16(&buf[20], 512); /* 512k buffer */ 852 cpu_to_ube16(&buf[22], 704); /* 4x read speed current */ 853 buf[24] = 0; 854 buf[25] = 0; 855 buf[26] = 0; 856 buf[27] = 0; 857 buf[28] = 0; 858 buf[29] = 0; 859 ide_atapi_cmd_reply(s, 30, max_len); 860 break; 861 default: 862 goto error_cmd; 863 } 864 break; 865 case 1: /* changeable values */ 866 goto error_cmd; 867 case 2: /* default values */ 868 goto error_cmd; 869 default: 870 case 3: /* saved values */ 871 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 872 ASC_SAVING_PARAMETERS_NOT_SUPPORTED); 873 break; 874 } 875 return; 876 877 error_cmd: 878 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET); 879 } 880 881 static void cmd_test_unit_ready(IDEState *s, uint8_t *buf) 882 { 883 /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we 884 * come here, we know that it's ready. */ 885 ide_atapi_cmd_ok(s); 886 } 887 888 static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf) 889 { 890 s->tray_locked = buf[4] & 1; 891 blk_lock_medium(s->blk, buf[4] & 1); 892 ide_atapi_cmd_ok(s); 893 } 894 895 static void cmd_read(IDEState *s, uint8_t* buf) 896 { 897 int nb_sectors, lba; 898 899 if (buf[0] == GPCMD_READ_10) { 900 nb_sectors = ube16_to_cpu(buf + 7); 901 } else { 902 nb_sectors = ube32_to_cpu(buf + 6); 903 } 904 905 lba = ube32_to_cpu(buf + 2); 906 if (nb_sectors == 0) { 907 ide_atapi_cmd_ok(s); 908 return; 909 } 910 911 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 912 } 913 914 static void cmd_read_cd(IDEState *s, uint8_t* buf) 915 { 916 int nb_sectors, lba, transfer_request; 917 918 nb_sectors = (buf[6] << 16) | (buf[7] << 8) | buf[8]; 919 lba = ube32_to_cpu(buf + 2); 920 921 if (nb_sectors == 0) { 922 ide_atapi_cmd_ok(s); 923 return; 924 } 925 926 transfer_request = buf[9]; 927 switch(transfer_request & 0xf8) { 928 case 0x00: 929 /* nothing */ 930 ide_atapi_cmd_ok(s); 931 break; 932 case 0x10: 933 /* normal read */ 934 ide_atapi_cmd_read(s, lba, nb_sectors, 2048); 935 break; 936 case 0xf8: 937 /* read all data */ 938 ide_atapi_cmd_read(s, lba, nb_sectors, 2352); 939 break; 940 default: 941 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 942 ASC_INV_FIELD_IN_CMD_PACKET); 943 break; 944 } 945 } 946 947 static void cmd_seek(IDEState *s, uint8_t* buf) 948 { 949 unsigned int lba; 950 uint64_t total_sectors = s->nb_sectors >> 2; 951 952 lba = ube32_to_cpu(buf + 2); 953 if (lba >= total_sectors) { 954 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR); 955 return; 956 } 957 958 ide_atapi_cmd_ok(s); 959 } 960 961 static void cmd_start_stop_unit(IDEState *s, uint8_t* buf) 962 { 963 int sense; 964 bool start = buf[4] & 1; 965 bool loej = buf[4] & 2; /* load on start, eject on !start */ 966 int pwrcnd = buf[4] & 0xf0; 967 968 if (pwrcnd) { 969 /* eject/load only happens for power condition == 0 */ 970 return; 971 } 972 973 if (loej) { 974 if (!start && !s->tray_open && s->tray_locked) { 975 sense = blk_is_inserted(s->blk) 976 ? NOT_READY : ILLEGAL_REQUEST; 977 ide_atapi_cmd_error(s, sense, ASC_MEDIA_REMOVAL_PREVENTED); 978 return; 979 } 980 981 if (s->tray_open != !start) { 982 blk_eject(s->blk, !start); 983 s->tray_open = !start; 984 } 985 } 986 987 ide_atapi_cmd_ok(s); 988 } 989 990 static void cmd_mechanism_status(IDEState *s, uint8_t* buf) 991 { 992 int max_len = ube16_to_cpu(buf + 8); 993 994 cpu_to_ube16(buf, 0); 995 /* no current LBA */ 996 buf[2] = 0; 997 buf[3] = 0; 998 buf[4] = 0; 999 buf[5] = 1; 1000 cpu_to_ube16(buf + 6, 0); 1001 ide_atapi_cmd_reply(s, 8, max_len); 1002 } 1003 1004 static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf) 1005 { 1006 int format, msf, start_track, len; 1007 int max_len; 1008 uint64_t total_sectors = s->nb_sectors >> 2; 1009 1010 max_len = ube16_to_cpu(buf + 7); 1011 format = buf[9] >> 6; 1012 msf = (buf[1] >> 1) & 1; 1013 start_track = buf[6]; 1014 1015 switch(format) { 1016 case 0: 1017 len = cdrom_read_toc(total_sectors, buf, msf, start_track); 1018 if (len < 0) 1019 goto error_cmd; 1020 ide_atapi_cmd_reply(s, len, max_len); 1021 break; 1022 case 1: 1023 /* multi session : only a single session defined */ 1024 memset(buf, 0, 12); 1025 buf[1] = 0x0a; 1026 buf[2] = 0x01; 1027 buf[3] = 0x01; 1028 ide_atapi_cmd_reply(s, 12, max_len); 1029 break; 1030 case 2: 1031 len = cdrom_read_toc_raw(total_sectors, buf, msf, start_track); 1032 if (len < 0) 1033 goto error_cmd; 1034 ide_atapi_cmd_reply(s, len, max_len); 1035 break; 1036 default: 1037 error_cmd: 1038 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1039 ASC_INV_FIELD_IN_CMD_PACKET); 1040 } 1041 } 1042 1043 static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf) 1044 { 1045 uint64_t total_sectors = s->nb_sectors >> 2; 1046 1047 /* NOTE: it is really the number of sectors minus 1 */ 1048 cpu_to_ube32(buf, total_sectors - 1); 1049 cpu_to_ube32(buf + 4, 2048); 1050 ide_atapi_cmd_reply(s, 8, 8); 1051 } 1052 1053 static void cmd_read_disc_information(IDEState *s, uint8_t* buf) 1054 { 1055 uint8_t type = buf[1] & 7; 1056 uint32_t max_len = ube16_to_cpu(buf + 7); 1057 1058 /* Types 1/2 are only defined for Blu-Ray. */ 1059 if (type != 0) { 1060 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1061 ASC_INV_FIELD_IN_CMD_PACKET); 1062 return; 1063 } 1064 1065 memset(buf, 0, 34); 1066 buf[1] = 32; 1067 buf[2] = 0xe; /* last session complete, disc finalized */ 1068 buf[3] = 1; /* first track on disc */ 1069 buf[4] = 1; /* # of sessions */ 1070 buf[5] = 1; /* first track of last session */ 1071 buf[6] = 1; /* last track of last session */ 1072 buf[7] = 0x20; /* unrestricted use */ 1073 buf[8] = 0x00; /* CD-ROM or DVD-ROM */ 1074 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */ 1075 /* 12-23: not meaningful for CD-ROM or DVD-ROM */ 1076 /* 24-31: disc bar code */ 1077 /* 32: disc application code */ 1078 /* 33: number of OPC tables */ 1079 1080 ide_atapi_cmd_reply(s, 34, max_len); 1081 } 1082 1083 static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf) 1084 { 1085 int max_len; 1086 int media = buf[1]; 1087 int format = buf[7]; 1088 int ret; 1089 1090 max_len = ube16_to_cpu(buf + 8); 1091 1092 if (format < 0xff) { 1093 if (media_is_cd(s)) { 1094 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1095 ASC_INCOMPATIBLE_FORMAT); 1096 return; 1097 } else if (!media_present(s)) { 1098 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1099 ASC_INV_FIELD_IN_CMD_PACKET); 1100 return; 1101 } 1102 } 1103 1104 memset(buf, 0, max_len > IDE_DMA_BUF_SECTORS * 512 + 4 ? 1105 IDE_DMA_BUF_SECTORS * 512 + 4 : max_len); 1106 1107 switch (format) { 1108 case 0x00 ... 0x7f: 1109 case 0xff: 1110 if (media == 0) { 1111 ret = ide_dvd_read_structure(s, format, buf, buf); 1112 1113 if (ret < 0) { 1114 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, -ret); 1115 } else { 1116 ide_atapi_cmd_reply(s, ret, max_len); 1117 } 1118 1119 break; 1120 } 1121 /* TODO: BD support, fall through for now */ 1122 1123 /* Generic disk structures */ 1124 case 0x80: /* TODO: AACS volume identifier */ 1125 case 0x81: /* TODO: AACS media serial number */ 1126 case 0x82: /* TODO: AACS media identifier */ 1127 case 0x83: /* TODO: AACS media key block */ 1128 case 0x90: /* TODO: List of recognized format layers */ 1129 case 0xc0: /* TODO: Write protection status */ 1130 default: 1131 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, 1132 ASC_INV_FIELD_IN_CMD_PACKET); 1133 break; 1134 } 1135 } 1136 1137 static void cmd_set_speed(IDEState *s, uint8_t* buf) 1138 { 1139 ide_atapi_cmd_ok(s); 1140 } 1141 1142 enum { 1143 /* 1144 * Only commands flagged as ALLOW_UA are allowed to run under a 1145 * unit attention condition. (See MMC-5, section 4.1.6.1) 1146 */ 1147 ALLOW_UA = 0x01, 1148 1149 /* 1150 * Commands flagged with CHECK_READY can only execute if a medium is present. 1151 * Otherwise they report the Not Ready Condition. (See MMC-5, section 1152 * 4.1.8) 1153 */ 1154 CHECK_READY = 0x02, 1155 }; 1156 1157 static const struct { 1158 void (*handler)(IDEState *s, uint8_t *buf); 1159 int flags; 1160 } atapi_cmd_table[0x100] = { 1161 [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY }, 1162 [ 0x03 ] = { cmd_request_sense, ALLOW_UA }, 1163 [ 0x12 ] = { cmd_inquiry, ALLOW_UA }, 1164 [ 0x1b ] = { cmd_start_stop_unit, 0 }, /* [1] */ 1165 [ 0x1e ] = { cmd_prevent_allow_medium_removal, 0 }, 1166 [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY }, 1167 [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY }, 1168 [ 0x2b ] = { cmd_seek, CHECK_READY }, 1169 [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY }, 1170 [ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, 1171 [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, 1172 [ 0x51 ] = { cmd_read_disc_information, CHECK_READY }, 1173 [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, 1174 [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY }, 1175 [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY }, 1176 [ 0xbb ] = { cmd_set_speed, 0 }, 1177 [ 0xbd ] = { cmd_mechanism_status, 0 }, 1178 [ 0xbe ] = { cmd_read_cd, CHECK_READY }, 1179 /* [1] handler detects and reports not ready condition itself */ 1180 }; 1181 1182 void ide_atapi_cmd(IDEState *s) 1183 { 1184 uint8_t *buf; 1185 1186 buf = s->io_buffer; 1187 #ifdef DEBUG_IDE_ATAPI 1188 { 1189 int i; 1190 printf("ATAPI limit=0x%x packet:", s->lcyl | (s->hcyl << 8)); 1191 for(i = 0; i < ATAPI_PACKET_SIZE; i++) { 1192 printf(" %02x", buf[i]); 1193 } 1194 printf("\n"); 1195 } 1196 #endif 1197 /* 1198 * If there's a UNIT_ATTENTION condition pending, only command flagged with 1199 * ALLOW_UA are allowed to complete. with other commands getting a CHECK 1200 * condition response unless a higher priority status, defined by the drive 1201 * here, is pending. 1202 */ 1203 if (s->sense_key == UNIT_ATTENTION && 1204 !(atapi_cmd_table[s->io_buffer[0]].flags & ALLOW_UA)) { 1205 ide_atapi_cmd_check_status(s); 1206 return; 1207 } 1208 /* 1209 * When a CD gets changed, we have to report an ejected state and 1210 * then a loaded state to guests so that they detect tray 1211 * open/close and media change events. Guests that do not use 1212 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close 1213 * states rely on this behavior. 1214 */ 1215 if (!(atapi_cmd_table[s->io_buffer[0]].flags & ALLOW_UA) && 1216 !s->tray_open && blk_is_inserted(s->blk) && s->cdrom_changed) { 1217 1218 if (s->cdrom_changed == 1) { 1219 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1220 s->cdrom_changed = 2; 1221 } else { 1222 ide_atapi_cmd_error(s, UNIT_ATTENTION, ASC_MEDIUM_MAY_HAVE_CHANGED); 1223 s->cdrom_changed = 0; 1224 } 1225 1226 return; 1227 } 1228 1229 /* Report a Not Ready condition if appropriate for the command */ 1230 if ((atapi_cmd_table[s->io_buffer[0]].flags & CHECK_READY) && 1231 (!media_present(s) || !blk_is_inserted(s->blk))) 1232 { 1233 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); 1234 return; 1235 } 1236 1237 /* Execute the command */ 1238 if (atapi_cmd_table[s->io_buffer[0]].handler) { 1239 atapi_cmd_table[s->io_buffer[0]].handler(s, buf); 1240 return; 1241 } 1242 1243 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE); 1244 } 1245