disk/part.c

   1 /*
   2  * (C) Copyright 2001
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <command.h>
  10 #include <errno.h>
  11 #include <ide.h>
  12 #include <malloc.h>
  13 #include <part.h>
  14 #include <ubifs_uboot.h>
  15
  16 #undef  PART_DEBUG
  17
  18 #ifdef  PART_DEBUG
  19 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  20 #else
  21 #define PRINTF(fmt,args...)
  22 #endif
  23
  24 struct block_drvr {
  25         char *name;
  26         struct blk_desc* (*get_dev)(int dev);
  27         int (*select_hwpart)(int dev_num, int hwpart);
  28 };
  29
  30 static const struct block_drvr block_drvr[] = {
  31 #if defined(CONFIG_CMD_IDE)
  32         { .name = "ide", .get_dev = ide_get_dev, },
  33 #endif
  34 #if defined(CONFIG_CMD_SATA)
  35         {.name = "sata", .get_dev = sata_get_dev, },
  36 #endif
  37 #if defined(CONFIG_CMD_SCSI)
  38         { .name = "scsi", .get_dev = scsi_get_dev, },
  39 #endif
  40 #if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
  41         { .name = "usb", .get_dev = usb_stor_get_dev, },
  42 #endif
  43 #if defined(CONFIG_MMC)
  44         {
  45                 .name = "mmc",
  46                 .get_dev = mmc_get_dev,
  47                 .select_hwpart = mmc_select_hwpart,
  48         },
  49 #endif
  50 #if defined(CONFIG_SYSTEMACE)
  51         { .name = "ace", .get_dev = systemace_get_dev, },
  52 #endif
  53 #if defined(CONFIG_SANDBOX)
  54         { .name = "host", .get_dev = host_get_dev, },
  55 #endif
  56         { },
  57 };
  58
  59 DECLARE_GLOBAL_DATA_PTR;
  60
  61 #ifdef HAVE_BLOCK_DEVICE
  62 static struct part_driver *part_driver_lookup_type(int part_type)
  63 {
  64         struct part_driver *drv =
  65                 ll_entry_start(struct part_driver, part_driver);
  66         const int n_ents = ll_entry_count(struct part_driver, part_driver);
  67         struct part_driver *entry;
  68
  69         for (entry = drv; entry != drv + n_ents; entry++) {
  70                 if (part_type == entry->part_type)
  71                         return entry;
  72         }
  73
  74         /* Not found */
  75         return NULL;
  76 }
  77
  78 static struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart)
  79 {
  80         const struct block_drvr *drvr = block_drvr;
  81         struct blk_desc* (*reloc_get_dev)(int dev);
  82         int (*select_hwpart)(int dev_num, int hwpart);
  83         char *name;
  84         int ret;
  85
  86         if (!ifname)
  87                 return NULL;
  88
  89         name = drvr->name;
  90 #ifdef CONFIG_NEEDS_MANUAL_RELOC
  91         name += gd->reloc_off;
  92 #endif
  93         while (drvr->name) {
  94                 name = drvr->name;
  95                 reloc_get_dev = drvr->get_dev;
  96                 select_hwpart = drvr->select_hwpart;
  97 #ifdef CONFIG_NEEDS_MANUAL_RELOC
  98                 name += gd->reloc_off;
  99                 reloc_get_dev += gd->reloc_off;
 100                 if (select_hwpart)
 101                         select_hwpart += gd->reloc_off;
 102 #endif
 103                 if (strncmp(ifname, name, strlen(name)) == 0) {
 104                         struct blk_desc *dev_desc = reloc_get_dev(dev);
 105                         if (!dev_desc)
 106                                 return NULL;
 107                         if (hwpart == 0 && !select_hwpart)
 108                                 return dev_desc;
 109                         if (!select_hwpart)
 110                                 return NULL;
 111                         ret = select_hwpart(dev_desc->devnum, hwpart);
 112                         if (ret < 0)
 113                                 return NULL;
 114                         return dev_desc;
 115                 }
 116                 drvr++;
 117         }
 118         return NULL;
 119 }
 120
 121 struct blk_desc *blk_get_dev(const char *ifname, int dev)
 122 {
 123         return get_dev_hwpart(ifname, dev, 0);
 124 }
 125 #else
 126 struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart)
 127 {
 128         return NULL;
 129 }
 130
 131 struct blk_desc *blk_get_dev(const char *ifname, int dev)
 132 {
 133         return NULL;
 134 }
 135 #endif
 136
 137 #ifdef HAVE_BLOCK_DEVICE
 138
 139 /* ------------------------------------------------------------------------- */
 140 /*
 141  * reports device info to the user
 142  */
 143
 144 #ifdef CONFIG_LBA48
 145 typedef uint64_t lba512_t;
 146 #else
 147 typedef lbaint_t lba512_t;
 148 #endif
 149
 150 /*
 151  * Overflowless variant of (block_count * mul_by / div_by)
 152  * when div_by > mul_by
 153  */
 154 static lba512_t lba512_muldiv(lba512_t block_count, lba512_t mul_by, lba512_t div_by)
 155 {
 156         lba512_t bc_quot, bc_rem;
 157
 158         /* x * m / d == x / d * m + (x % d) * m / d */
 159         bc_quot = block_count / div_by;
 160         bc_rem  = block_count - div_by * bc_quot;
 161         return bc_quot * mul_by + (bc_rem * mul_by) / div_by;
 162 }
 163
 164 void dev_print (struct blk_desc *dev_desc)
 165 {
 166         lba512_t lba512; /* number of blocks if 512bytes block size */
 167
 168         if (dev_desc->type == DEV_TYPE_UNKNOWN) {
 169                 puts ("not available\n");
 170                 return;
 171         }
 172
 173         switch (dev_desc->if_type) {
 174         case IF_TYPE_SCSI:
 175                 printf ("(%d:%d) Vendor: %s Prod.: %s Rev: %s\n",
 176                         dev_desc->target,dev_desc->lun,
 177                         dev_desc->vendor,
 178                         dev_desc->product,
 179                         dev_desc->revision);
 180                 break;
 181         case IF_TYPE_ATAPI:
 182         case IF_TYPE_IDE:
 183         case IF_TYPE_SATA:
 184                 printf ("Model: %s Firm: %s Ser#: %s\n",
 185                         dev_desc->vendor,
 186                         dev_desc->revision,
 187                         dev_desc->product);
 188                 break;
 189         case IF_TYPE_SD:
 190         case IF_TYPE_MMC:
 191         case IF_TYPE_USB:
 192                 printf ("Vendor: %s Rev: %s Prod: %s\n",
 193                         dev_desc->vendor,
 194                         dev_desc->revision,
 195                         dev_desc->product);
 196                 break;
 197         case IF_TYPE_DOC:
 198                 puts("device type DOC\n");
 199                 return;
 200         case IF_TYPE_UNKNOWN:
 201                 puts("device type unknown\n");
 202                 return;
 203         default:
 204                 printf("Unhandled device type: %i\n", dev_desc->if_type);
 205                 return;
 206         }
 207         puts ("            Type: ");
 208         if (dev_desc->removable)
 209                 puts ("Removable ");
 210         switch (dev_desc->type & 0x1F) {
 211         case DEV_TYPE_HARDDISK:
 212                 puts ("Hard Disk");
 213                 break;
 214         case DEV_TYPE_CDROM:
 215                 puts ("CD ROM");
 216                 break;
 217         case DEV_TYPE_OPDISK:
 218                 puts ("Optical Device");
 219                 break;
 220         case DEV_TYPE_TAPE:
 221                 puts ("Tape");
 222                 break;
 223         default:
 224                 printf ("# %02X #", dev_desc->type & 0x1F);
 225                 break;
 226         }
 227         puts ("\n");
 228         if (dev_desc->lba > 0L && dev_desc->blksz > 0L) {
 229                 ulong mb, mb_quot, mb_rem, gb, gb_quot, gb_rem;
 230                 lbaint_t lba;
 231
 232                 lba = dev_desc->lba;
 233
 234                 lba512 = (lba * (dev_desc->blksz/512));
 235                 /* round to 1 digit */
 236                 /* 2048 = (1024 * 1024) / 512 MB */
 237                 mb = lba512_muldiv(lba512, 10, 2048);
 238
 239                 mb_quot = mb / 10;
 240                 mb_rem  = mb - (10 * mb_quot);
 241
 242                 gb = mb / 1024;
 243                 gb_quot = gb / 10;
 244                 gb_rem  = gb - (10 * gb_quot);
 245 #ifdef CONFIG_LBA48
 246                 if (dev_desc->lba48)
 247                         printf ("            Supports 48-bit addressing\n");
 248 #endif
 249 #if defined(CONFIG_SYS_64BIT_LBA)
 250                 printf ("            Capacity: %ld.%ld MB = %ld.%ld GB (%Ld x %ld)\n",
 251                         mb_quot, mb_rem,
 252                         gb_quot, gb_rem,
 253                         lba,
 254                         dev_desc->blksz);
 255 #else
 256                 printf ("            Capacity: %ld.%ld MB = %ld.%ld GB (%ld x %ld)\n",
 257                         mb_quot, mb_rem,
 258                         gb_quot, gb_rem,
 259                         (ulong)lba,
 260                         dev_desc->blksz);
 261 #endif
 262         } else {
 263                 puts ("            Capacity: not available\n");
 264         }
 265 }
 266 #endif
 267
 268 #ifdef HAVE_BLOCK_DEVICE
 269
 270 void part_init(struct blk_desc *dev_desc)
 271 {
 272         struct part_driver *drv =
 273                 ll_entry_start(struct part_driver, part_driver);
 274         const int n_ents = ll_entry_count(struct part_driver, part_driver);
 275         struct part_driver *entry;
 276
 277         dev_desc->part_type = PART_TYPE_UNKNOWN;
 278         for (entry = drv; entry != drv + n_ents; entry++) {
 279                 int ret;
 280
 281                 ret = entry->test(dev_desc);
 282                 debug("%s: try '%s': ret=%d\n", __func__, entry->name, ret);
 283                 if (!ret) {
 284                         dev_desc->part_type = entry->part_type;
 285                         break;
 286                 }
 287         }
 288 }
 289
 290 static void print_part_header(const char *type, struct blk_desc *dev_desc)
 291 {
 292 #if defined(CONFIG_MAC_PARTITION) || \
 293         defined(CONFIG_DOS_PARTITION) || \
 294         defined(CONFIG_ISO_PARTITION) || \
 295         defined(CONFIG_AMIGA_PARTITION) || \
 296         defined(CONFIG_EFI_PARTITION)
 297         puts ("\nPartition Map for ");
 298         switch (dev_desc->if_type) {
 299         case IF_TYPE_IDE:
 300                 puts ("IDE");
 301                 break;
 302         case IF_TYPE_SATA:
 303                 puts ("SATA");
 304                 break;
 305         case IF_TYPE_SCSI:
 306                 puts ("SCSI");
 307                 break;
 308         case IF_TYPE_ATAPI:
 309                 puts ("ATAPI");
 310                 break;
 311         case IF_TYPE_USB:
 312                 puts ("USB");
 313                 break;
 314         case IF_TYPE_DOC:
 315                 puts ("DOC");
 316                 break;
 317         case IF_TYPE_MMC:
 318                 puts ("MMC");
 319                 break;
 320         case IF_TYPE_HOST:
 321                 puts("HOST");
 322                 break;
 323         default:
 324                 puts ("UNKNOWN");
 325                 break;
 326         }
 327         printf (" device %d  --   Partition Type: %s\n\n",
 328                         dev_desc->devnum, type);
 329 #endif /* any CONFIG_..._PARTITION */
 330 }
 331
 332 void part_print(struct blk_desc *dev_desc)
 333 {
 334         struct part_driver *drv;
 335
 336         drv = part_driver_lookup_type(dev_desc->part_type);
 337         if (!drv) {
 338                 printf("## Unknown partition table type %x\n",
 339                        dev_desc->part_type);
 340                 return;
 341         }
 342
 343         PRINTF("## Testing for valid %s partition ##\n", drv->name);
 344         print_part_header(drv->name, dev_desc);
 345         if (drv->print)
 346                 drv->print(dev_desc);
 347 }
 348
 349 #endif /* HAVE_BLOCK_DEVICE */
 350
 351 int part_get_info(struct blk_desc *dev_desc, int part,
 352                        disk_partition_t *info)
 353 {
 354 #ifdef HAVE_BLOCK_DEVICE
 355         struct part_driver *drv;
 356
 357 #ifdef CONFIG_PARTITION_UUIDS
 358         /* The common case is no UUID support */
 359         info->uuid[0] = 0;
 360 #endif
 361 #ifdef CONFIG_PARTITION_TYPE_GUID
 362         info->type_guid[0] = 0;
 363 #endif
 364
 365         drv = part_driver_lookup_type(dev_desc->part_type);
 366         if (!drv) {
 367                 debug("## Unknown partition table type %x\n",
 368                       dev_desc->part_type);
 369                 return -EPROTONOSUPPORT;
 370         }
 371         if (!drv->get_info) {
 372                 PRINTF("## Driver %s does not have the get_info() method\n");
 373                 return -ENOSYS;
 374         }
 375         if (drv->get_info(dev_desc, part, info) == 0) {
 376                 PRINTF("## Valid %s partition found ##\n", drv->name);
 377                 return 0;
 378         }
 379 #endif /* HAVE_BLOCK_DEVICE */
 380
 381         return -1;
 382 }
 383
 384 int blk_get_device_by_str(const char *ifname, const char *dev_hwpart_str,
 385                           struct blk_desc **dev_desc)
 386 {
 387         char *ep;
 388         char *dup_str = NULL;
 389         const char *dev_str, *hwpart_str;
 390         int dev, hwpart;
 391
 392         hwpart_str = strchr(dev_hwpart_str, '.');
 393         if (hwpart_str) {
 394                 dup_str = strdup(dev_hwpart_str);
 395                 dup_str[hwpart_str - dev_hwpart_str] = 0;
 396                 dev_str = dup_str;
 397                 hwpart_str++;
 398         } else {
 399                 dev_str = dev_hwpart_str;
 400                 hwpart = 0;
 401         }
 402
 403         dev = simple_strtoul(dev_str, &ep, 16);
 404         if (*ep) {
 405                 printf("** Bad device specification %s %s **\n",
 406                        ifname, dev_str);
 407                 dev = -1;
 408                 goto cleanup;
 409         }
 410
 411         if (hwpart_str) {
 412                 hwpart = simple_strtoul(hwpart_str, &ep, 16);
 413                 if (*ep) {
 414                         printf("** Bad HW partition specification %s %s **\n",
 415                             ifname, hwpart_str);
 416                         dev = -1;
 417                         goto cleanup;
 418                 }
 419         }
 420
 421         *dev_desc = get_dev_hwpart(ifname, dev, hwpart);
 422         if (!(*dev_desc) || ((*dev_desc)->type == DEV_TYPE_UNKNOWN)) {
 423                 printf("** Bad device %s %s **\n", ifname, dev_hwpart_str);
 424                 dev = -1;
 425                 goto cleanup;
 426         }
 427
 428 #ifdef HAVE_BLOCK_DEVICE
 429         /*
 430          * Updates the partition table for the specified hw partition.
 431          * Does not need to be done for hwpart 0 since it is default and
 432          * already loaded.
 433          */
 434         if(hwpart != 0)
 435                 part_init(*dev_desc);
 436 #endif
 437
 438 cleanup:
 439         free(dup_str);
 440         return dev;
 441 }
 442
 443 #define PART_UNSPECIFIED -2
 444 #define PART_AUTO -1
 445 #define MAX_SEARCH_PARTITIONS 16
 446 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
 447                              struct blk_desc **dev_desc,
 448                              disk_partition_t *info, int allow_whole_dev)
 449 {
 450         int ret = -1;
 451         const char *part_str;
 452         char *dup_str = NULL;
 453         const char *dev_str;
 454         int dev;
 455         char *ep;
 456         int p;
 457         int part;
 458         disk_partition_t tmpinfo;
 459
 460 #ifdef CONFIG_SANDBOX
 461         /*
 462          * Special-case a pseudo block device "hostfs", to allow access to the
 463          * host's own filesystem.
 464          */
 465         if (0 == strcmp(ifname, "hostfs")) {
 466                 *dev_desc = NULL;
 467                 info->start = 0;
 468                 info->size = 0;
 469                 info->blksz = 0;
 470                 info->bootable = 0;
 471                 strcpy((char *)info->type, BOOT_PART_TYPE);
 472                 strcpy((char *)info->name, "Sandbox host");
 473 #ifdef CONFIG_PARTITION_UUIDS
 474                 info->uuid[0] = 0;
 475 #endif
 476 #ifdef CONFIG_PARTITION_TYPE_GUID
 477                 info->type_guid[0] = 0;
 478 #endif
 479
 480                 return 0;
 481         }
 482 #endif
 483
 484 #ifdef CONFIG_CMD_UBIFS
 485         /*
 486          * Special-case ubi, ubi goes through a mtd, rathen then through
 487          * a regular block device.
 488          */
 489         if (0 == strcmp(ifname, "ubi")) {
 490                 if (!ubifs_is_mounted()) {
 491                         printf("UBIFS not mounted, use ubifsmount to mount volume first!\n");
 492                         return -1;
 493                 }
 494
 495                 *dev_desc = NULL;
 496                 memset(info, 0, sizeof(*info));
 497                 strcpy((char *)info->type, BOOT_PART_TYPE);
 498                 strcpy((char *)info->name, "UBI");
 499 #ifdef CONFIG_PARTITION_UUIDS
 500                 info->uuid[0] = 0;
 501 #endif
 502                 return 0;
 503         }
 504 #endif
 505
 506         /* If no dev_part_str, use bootdevice environment variable */
 507         if (!dev_part_str || !strlen(dev_part_str) ||
 508             !strcmp(dev_part_str, "-"))
 509                 dev_part_str = getenv("bootdevice");
 510
 511         /* If still no dev_part_str, it's an error */
 512         if (!dev_part_str) {
 513                 printf("** No device specified **\n");
 514                 goto cleanup;
 515         }
 516
 517         /* Separate device and partition ID specification */
 518         part_str = strchr(dev_part_str, ':');
 519         if (part_str) {
 520                 dup_str = strdup(dev_part_str);
 521                 dup_str[part_str - dev_part_str] = 0;
 522                 dev_str = dup_str;
 523                 part_str++;
 524         } else {
 525                 dev_str = dev_part_str;
 526         }
 527
 528         /* Look up the device */
 529         dev = blk_get_device_by_str(ifname, dev_str, dev_desc);
 530         if (dev < 0)
 531                 goto cleanup;
 532
 533         /* Convert partition ID string to number */
 534         if (!part_str || !*part_str) {
 535                 part = PART_UNSPECIFIED;
 536         } else if (!strcmp(part_str, "auto")) {
 537                 part = PART_AUTO;
 538         } else {
 539                 /* Something specified -> use exactly that */
 540                 part = (int)simple_strtoul(part_str, &ep, 16);
 541                 /*
 542                  * Less than whole string converted,
 543                  * or request for whole device, but caller requires partition.
 544                  */
 545                 if (*ep || (part == 0 && !allow_whole_dev)) {
 546                         printf("** Bad partition specification %s %s **\n",
 547                             ifname, dev_part_str);
 548                         goto cleanup;
 549                 }
 550         }
 551
 552         /*
 553          * No partition table on device,
 554          * or user requested partition 0 (entire device).
 555          */
 556         if (((*dev_desc)->part_type == PART_TYPE_UNKNOWN) ||
 557             (part == 0)) {
 558                 if (!(*dev_desc)->lba) {
 559                         printf("** Bad device size - %s %s **\n", ifname,
 560                                dev_str);
 561                         goto cleanup;
 562                 }
 563
 564                 /*
 565                  * If user specified a partition ID other than 0,
 566                  * or the calling command only accepts partitions,
 567                  * it's an error.
 568                  */
 569                 if ((part > 0) || (!allow_whole_dev)) {
 570                         printf("** No partition table - %s %s **\n", ifname,
 571                                dev_str);
 572                         goto cleanup;
 573                 }
 574
 575                 (*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
 576
 577                 info->start = 0;
 578                 info->size = (*dev_desc)->lba;
 579                 info->blksz = (*dev_desc)->blksz;
 580                 info->bootable = 0;
 581                 strcpy((char *)info->type, BOOT_PART_TYPE);
 582                 strcpy((char *)info->name, "Whole Disk");
 583 #ifdef CONFIG_PARTITION_UUIDS
 584                 info->uuid[0] = 0;
 585 #endif
 586 #ifdef CONFIG_PARTITION_TYPE_GUID
 587                 info->type_guid[0] = 0;
 588 #endif
 589
 590                 ret = 0;
 591                 goto cleanup;
 592         }
 593
 594         /*
 595          * Now there's known to be a partition table,
 596          * not specifying a partition means to pick partition 1.
 597          */
 598         if (part == PART_UNSPECIFIED)
 599                 part = 1;
 600
 601         /*
 602          * If user didn't specify a partition number, or did specify something
 603          * other than "auto", use that partition number directly.
 604          */
 605         if (part != PART_AUTO) {
 606                 ret = part_get_info(*dev_desc, part, info);
 607                 if (ret) {
 608                         printf("** Invalid partition %d **\n", part);
 609                         goto cleanup;
 610                 }
 611         } else {
 612                 /*
 613                  * Find the first bootable partition.
 614                  * If none are bootable, fall back to the first valid partition.
 615                  */
 616                 part = 0;
 617                 for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
 618                         ret = part_get_info(*dev_desc, p, info);
 619                         if (ret)
 620                                 continue;
 621
 622                         /*
 623                          * First valid partition, or new better partition?
 624                          * If so, save partition ID.
 625                          */
 626                         if (!part || info->bootable)
 627                                 part = p;
 628
 629                         /* Best possible partition? Stop searching. */
 630                         if (info->bootable)
 631                                 break;
 632
 633                         /*
 634                          * We now need to search further for best possible.
 635                          * If we what we just queried was the best so far,
 636                          * save the info since we over-write it next loop.
 637                          */
 638                         if (part == p)
 639                                 tmpinfo = *info;
 640                 }
 641                 /* If we found any acceptable partition */
 642                 if (part) {
 643                         /*
 644                          * If we searched all possible partition IDs,
 645                          * return the first valid partition we found.
 646                          */
 647                         if (p == MAX_SEARCH_PARTITIONS + 1)
 648                                 *info = tmpinfo;
 649                 } else {
 650                         printf("** No valid partitions found **\n");
 651                         ret = -1;
 652                         goto cleanup;
 653                 }
 654         }
 655         if (strncmp((char *)info->type, BOOT_PART_TYPE, sizeof(info->type)) != 0) {
 656                 printf("** Invalid partition type \"%.32s\""
 657                         " (expect \"" BOOT_PART_TYPE "\")\n",
 658                         info->type);
 659                 ret  = -1;
 660                 goto cleanup;
 661         }
 662
 663         (*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
 664
 665         ret = part;
 666         goto cleanup;
 667
 668 cleanup:
 669         free(dup_str);
 670         return ret;
 671 }