x86: Update chromebook_link instructions for binary blob
[platform/kernel/u-boot.git] / 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 <ide.h>
11 #include <malloc.h>
12 #include <part.h>
13
14 #undef  PART_DEBUG
15
16 #ifdef  PART_DEBUG
17 #define PRINTF(fmt,args...)     printf (fmt ,##args)
18 #else
19 #define PRINTF(fmt,args...)
20 #endif
21
22 struct block_drvr {
23         char *name;
24         block_dev_desc_t* (*get_dev)(int dev);
25         int (*select_hwpart)(int dev_num, int hwpart);
26 };
27
28 static const struct block_drvr block_drvr[] = {
29 #if defined(CONFIG_CMD_IDE)
30         { .name = "ide", .get_dev = ide_get_dev, },
31 #endif
32 #if defined(CONFIG_CMD_SATA)
33         {.name = "sata", .get_dev = sata_get_dev, },
34 #endif
35 #if defined(CONFIG_CMD_SCSI)
36         { .name = "scsi", .get_dev = scsi_get_dev, },
37 #endif
38 #if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
39         { .name = "usb", .get_dev = usb_stor_get_dev, },
40 #endif
41 #if defined(CONFIG_MMC)
42         {
43                 .name = "mmc",
44                 .get_dev = mmc_get_dev,
45                 .select_hwpart = mmc_select_hwpart,
46         },
47 #endif
48 #if defined(CONFIG_SYSTEMACE)
49         { .name = "ace", .get_dev = systemace_get_dev, },
50 #endif
51 #if defined(CONFIG_SANDBOX)
52         { .name = "host", .get_dev = host_get_dev, },
53 #endif
54         { },
55 };
56
57 DECLARE_GLOBAL_DATA_PTR;
58
59 #ifdef HAVE_BLOCK_DEVICE
60 static block_dev_desc_t *get_dev_hwpart(const char *ifname, int dev, int hwpart)
61 {
62         const struct block_drvr *drvr = block_drvr;
63         block_dev_desc_t* (*reloc_get_dev)(int dev);
64         int (*select_hwpart)(int dev_num, int hwpart);
65         char *name;
66         int ret;
67
68         if (!ifname)
69                 return NULL;
70
71         name = drvr->name;
72 #ifdef CONFIG_NEEDS_MANUAL_RELOC
73         name += gd->reloc_off;
74 #endif
75         while (drvr->name) {
76                 name = drvr->name;
77                 reloc_get_dev = drvr->get_dev;
78                 select_hwpart = drvr->select_hwpart;
79 #ifdef CONFIG_NEEDS_MANUAL_RELOC
80                 name += gd->reloc_off;
81                 reloc_get_dev += gd->reloc_off;
82                 if (select_hwpart)
83                         select_hwpart += gd->reloc_off;
84 #endif
85                 if (strncmp(ifname, name, strlen(name)) == 0) {
86                         block_dev_desc_t *dev_desc = reloc_get_dev(dev);
87                         if (!dev_desc)
88                                 return NULL;
89                         if (hwpart == 0 && !select_hwpart)
90                                 return dev_desc;
91                         if (!select_hwpart)
92                                 return NULL;
93                         ret = select_hwpart(dev_desc->dev, hwpart);
94                         if (ret < 0)
95                                 return NULL;
96                         return dev_desc;
97                 }
98                 drvr++;
99         }
100         return NULL;
101 }
102
103 block_dev_desc_t *get_dev(const char *ifname, int dev)
104 {
105         return get_dev_hwpart(ifname, dev, 0);
106 }
107 #else
108 block_dev_desc_t *get_dev_hwpart(const char *ifname, int dev, int hwpart)
109 {
110         return NULL;
111 }
112
113 block_dev_desc_t *get_dev(const char *ifname, int dev)
114 {
115         return NULL;
116 }
117 #endif
118
119 #ifdef HAVE_BLOCK_DEVICE
120
121 /* ------------------------------------------------------------------------- */
122 /*
123  * reports device info to the user
124  */
125
126 #ifdef CONFIG_LBA48
127 typedef uint64_t lba512_t;
128 #else
129 typedef lbaint_t lba512_t;
130 #endif
131
132 /*
133  * Overflowless variant of (block_count * mul_by / div_by)
134  * when div_by > mul_by
135  */
136 static lba512_t lba512_muldiv(lba512_t block_count, lba512_t mul_by, lba512_t div_by)
137 {
138         lba512_t bc_quot, bc_rem;
139
140         /* x * m / d == x / d * m + (x % d) * m / d */
141         bc_quot = block_count / div_by;
142         bc_rem  = block_count - div_by * bc_quot;
143         return bc_quot * mul_by + (bc_rem * mul_by) / div_by;
144 }
145
146 void dev_print (block_dev_desc_t *dev_desc)
147 {
148         lba512_t lba512; /* number of blocks if 512bytes block size */
149
150         if (dev_desc->type == DEV_TYPE_UNKNOWN) {
151                 puts ("not available\n");
152                 return;
153         }
154
155         switch (dev_desc->if_type) {
156         case IF_TYPE_SCSI:
157                 printf ("(%d:%d) Vendor: %s Prod.: %s Rev: %s\n",
158                         dev_desc->target,dev_desc->lun,
159                         dev_desc->vendor,
160                         dev_desc->product,
161                         dev_desc->revision);
162                 break;
163         case IF_TYPE_ATAPI:
164         case IF_TYPE_IDE:
165         case IF_TYPE_SATA:
166                 printf ("Model: %s Firm: %s Ser#: %s\n",
167                         dev_desc->vendor,
168                         dev_desc->revision,
169                         dev_desc->product);
170                 break;
171         case IF_TYPE_SD:
172         case IF_TYPE_MMC:
173         case IF_TYPE_USB:
174                 printf ("Vendor: %s Rev: %s Prod: %s\n",
175                         dev_desc->vendor,
176                         dev_desc->revision,
177                         dev_desc->product);
178                 break;
179         case IF_TYPE_DOC:
180                 puts("device type DOC\n");
181                 return;
182         case IF_TYPE_UNKNOWN:
183                 puts("device type unknown\n");
184                 return;
185         default:
186                 printf("Unhandled device type: %i\n", dev_desc->if_type);
187                 return;
188         }
189         puts ("            Type: ");
190         if (dev_desc->removable)
191                 puts ("Removable ");
192         switch (dev_desc->type & 0x1F) {
193         case DEV_TYPE_HARDDISK:
194                 puts ("Hard Disk");
195                 break;
196         case DEV_TYPE_CDROM:
197                 puts ("CD ROM");
198                 break;
199         case DEV_TYPE_OPDISK:
200                 puts ("Optical Device");
201                 break;
202         case DEV_TYPE_TAPE:
203                 puts ("Tape");
204                 break;
205         default:
206                 printf ("# %02X #", dev_desc->type & 0x1F);
207                 break;
208         }
209         puts ("\n");
210         if (dev_desc->lba > 0L && dev_desc->blksz > 0L) {
211                 ulong mb, mb_quot, mb_rem, gb, gb_quot, gb_rem;
212                 lbaint_t lba;
213
214                 lba = dev_desc->lba;
215
216                 lba512 = (lba * (dev_desc->blksz/512));
217                 /* round to 1 digit */
218                 /* 2048 = (1024 * 1024) / 512 MB */
219                 mb = lba512_muldiv(lba512, 10, 2048);
220
221                 mb_quot = mb / 10;
222                 mb_rem  = mb - (10 * mb_quot);
223
224                 gb = mb / 1024;
225                 gb_quot = gb / 10;
226                 gb_rem  = gb - (10 * gb_quot);
227 #ifdef CONFIG_LBA48
228                 if (dev_desc->lba48)
229                         printf ("            Supports 48-bit addressing\n");
230 #endif
231 #if defined(CONFIG_SYS_64BIT_LBA)
232                 printf ("            Capacity: %ld.%ld MB = %ld.%ld GB (%Ld x %ld)\n",
233                         mb_quot, mb_rem,
234                         gb_quot, gb_rem,
235                         lba,
236                         dev_desc->blksz);
237 #else
238                 printf ("            Capacity: %ld.%ld MB = %ld.%ld GB (%ld x %ld)\n",
239                         mb_quot, mb_rem,
240                         gb_quot, gb_rem,
241                         (ulong)lba,
242                         dev_desc->blksz);
243 #endif
244         } else {
245                 puts ("            Capacity: not available\n");
246         }
247 }
248 #endif
249
250 #ifdef HAVE_BLOCK_DEVICE
251
252 void init_part(block_dev_desc_t *dev_desc)
253 {
254 #ifdef CONFIG_ISO_PARTITION
255         if (test_part_iso(dev_desc) == 0) {
256                 dev_desc->part_type = PART_TYPE_ISO;
257                 return;
258         }
259 #endif
260
261 #ifdef CONFIG_MAC_PARTITION
262         if (test_part_mac(dev_desc) == 0) {
263                 dev_desc->part_type = PART_TYPE_MAC;
264                 return;
265         }
266 #endif
267
268 /* must be placed before DOS partition detection */
269 #ifdef CONFIG_EFI_PARTITION
270         if (test_part_efi(dev_desc) == 0) {
271                 dev_desc->part_type = PART_TYPE_EFI;
272                 return;
273         }
274 #endif
275
276 #ifdef CONFIG_DOS_PARTITION
277         if (test_part_dos(dev_desc) == 0) {
278                 dev_desc->part_type = PART_TYPE_DOS;
279                 return;
280         }
281 #endif
282
283 #ifdef CONFIG_AMIGA_PARTITION
284         if (test_part_amiga(dev_desc) == 0) {
285             dev_desc->part_type = PART_TYPE_AMIGA;
286             return;
287         }
288 #endif
289         dev_desc->part_type = PART_TYPE_UNKNOWN;
290 }
291
292
293 #if defined(CONFIG_MAC_PARTITION) || \
294         defined(CONFIG_DOS_PARTITION) || \
295         defined(CONFIG_ISO_PARTITION) || \
296         defined(CONFIG_AMIGA_PARTITION) || \
297         defined(CONFIG_EFI_PARTITION)
298
299 static void print_part_header(const char *type, block_dev_desc_t *dev_desc)
300 {
301         puts ("\nPartition Map for ");
302         switch (dev_desc->if_type) {
303         case IF_TYPE_IDE:
304                 puts ("IDE");
305                 break;
306         case IF_TYPE_SATA:
307                 puts ("SATA");
308                 break;
309         case IF_TYPE_SCSI:
310                 puts ("SCSI");
311                 break;
312         case IF_TYPE_ATAPI:
313                 puts ("ATAPI");
314                 break;
315         case IF_TYPE_USB:
316                 puts ("USB");
317                 break;
318         case IF_TYPE_DOC:
319                 puts ("DOC");
320                 break;
321         case IF_TYPE_MMC:
322                 puts ("MMC");
323                 break;
324         case IF_TYPE_HOST:
325                 puts("HOST");
326                 break;
327         default:
328                 puts ("UNKNOWN");
329                 break;
330         }
331         printf (" device %d  --   Partition Type: %s\n\n",
332                         dev_desc->dev, type);
333 }
334
335 #endif /* any CONFIG_..._PARTITION */
336
337 void print_part(block_dev_desc_t * dev_desc)
338 {
339
340                 switch (dev_desc->part_type) {
341 #ifdef CONFIG_MAC_PARTITION
342         case PART_TYPE_MAC:
343                 PRINTF ("## Testing for valid MAC partition ##\n");
344                 print_part_header ("MAC", dev_desc);
345                 print_part_mac (dev_desc);
346                 return;
347 #endif
348 #ifdef CONFIG_DOS_PARTITION
349         case PART_TYPE_DOS:
350                 PRINTF ("## Testing for valid DOS partition ##\n");
351                 print_part_header ("DOS", dev_desc);
352                 print_part_dos (dev_desc);
353                 return;
354 #endif
355
356 #ifdef CONFIG_ISO_PARTITION
357         case PART_TYPE_ISO:
358                 PRINTF ("## Testing for valid ISO Boot partition ##\n");
359                 print_part_header ("ISO", dev_desc);
360                 print_part_iso (dev_desc);
361                 return;
362 #endif
363
364 #ifdef CONFIG_AMIGA_PARTITION
365         case PART_TYPE_AMIGA:
366             PRINTF ("## Testing for a valid Amiga partition ##\n");
367             print_part_header ("AMIGA", dev_desc);
368             print_part_amiga (dev_desc);
369             return;
370 #endif
371
372 #ifdef CONFIG_EFI_PARTITION
373         case PART_TYPE_EFI:
374                 PRINTF ("## Testing for valid EFI partition ##\n");
375                 print_part_header ("EFI", dev_desc);
376                 print_part_efi (dev_desc);
377                 return;
378 #endif
379         }
380         puts ("## Unknown partition table\n");
381 }
382
383 #endif /* HAVE_BLOCK_DEVICE */
384
385 int get_partition_info(block_dev_desc_t *dev_desc, int part,
386                        disk_partition_t *info)
387 {
388 #ifdef HAVE_BLOCK_DEVICE
389
390 #ifdef CONFIG_PARTITION_UUIDS
391         /* The common case is no UUID support */
392         info->uuid[0] = 0;
393 #endif
394
395         switch (dev_desc->part_type) {
396 #ifdef CONFIG_MAC_PARTITION
397         case PART_TYPE_MAC:
398                 if (get_partition_info_mac(dev_desc, part, info) == 0) {
399                         PRINTF("## Valid MAC partition found ##\n");
400                         return 0;
401                 }
402                 break;
403 #endif
404
405 #ifdef CONFIG_DOS_PARTITION
406         case PART_TYPE_DOS:
407                 if (get_partition_info_dos(dev_desc, part, info) == 0) {
408                         PRINTF("## Valid DOS partition found ##\n");
409                         return 0;
410                 }
411                 break;
412 #endif
413
414 #ifdef CONFIG_ISO_PARTITION
415         case PART_TYPE_ISO:
416                 if (get_partition_info_iso(dev_desc, part, info) == 0) {
417                         PRINTF("## Valid ISO boot partition found ##\n");
418                         return 0;
419                 }
420                 break;
421 #endif
422
423 #ifdef CONFIG_AMIGA_PARTITION
424         case PART_TYPE_AMIGA:
425                 if (get_partition_info_amiga(dev_desc, part, info) == 0) {
426                         PRINTF("## Valid Amiga partition found ##\n");
427                         return 0;
428                 }
429                 break;
430 #endif
431
432 #ifdef CONFIG_EFI_PARTITION
433         case PART_TYPE_EFI:
434                 if (get_partition_info_efi(dev_desc, part, info) == 0) {
435                         PRINTF("## Valid EFI partition found ##\n");
436                         return 0;
437                 }
438                 break;
439 #endif
440         default:
441                 break;
442         }
443 #endif /* HAVE_BLOCK_DEVICE */
444
445         return -1;
446 }
447
448 int get_device(const char *ifname, const char *dev_hwpart_str,
449                block_dev_desc_t **dev_desc)
450 {
451         char *ep;
452         char *dup_str = NULL;
453         const char *dev_str, *hwpart_str;
454         int dev, hwpart;
455
456         hwpart_str = strchr(dev_hwpart_str, '.');
457         if (hwpart_str) {
458                 dup_str = strdup(dev_hwpart_str);
459                 dup_str[hwpart_str - dev_hwpart_str] = 0;
460                 dev_str = dup_str;
461                 hwpart_str++;
462         } else {
463                 dev_str = dev_hwpart_str;
464                 hwpart = 0;
465         }
466
467         dev = simple_strtoul(dev_str, &ep, 16);
468         if (*ep) {
469                 printf("** Bad device specification %s %s **\n",
470                        ifname, dev_str);
471                 dev = -1;
472                 goto cleanup;
473         }
474
475         if (hwpart_str) {
476                 hwpart = simple_strtoul(hwpart_str, &ep, 16);
477                 if (*ep) {
478                         printf("** Bad HW partition specification %s %s **\n",
479                             ifname, hwpart_str);
480                         dev = -1;
481                         goto cleanup;
482                 }
483         }
484
485         *dev_desc = get_dev_hwpart(ifname, dev, hwpart);
486         if (!(*dev_desc) || ((*dev_desc)->type == DEV_TYPE_UNKNOWN)) {
487                 printf("** Bad device %s %s **\n", ifname, dev_hwpart_str);
488                 dev = -1;
489                 goto cleanup;
490         }
491
492 cleanup:
493         free(dup_str);
494         return dev;
495 }
496
497 #define PART_UNSPECIFIED -2
498 #define PART_AUTO -1
499 #define MAX_SEARCH_PARTITIONS 16
500 int get_device_and_partition(const char *ifname, const char *dev_part_str,
501                              block_dev_desc_t **dev_desc,
502                              disk_partition_t *info, int allow_whole_dev)
503 {
504         int ret = -1;
505         const char *part_str;
506         char *dup_str = NULL;
507         const char *dev_str;
508         int dev;
509         char *ep;
510         int p;
511         int part;
512         disk_partition_t tmpinfo;
513
514         /*
515          * Special-case a pseudo block device "hostfs", to allow access to the
516          * host's own filesystem.
517          */
518         if (0 == strcmp(ifname, "hostfs")) {
519                 *dev_desc = NULL;
520                 info->start = 0;
521                 info->size = 0;
522                 info->blksz = 0;
523                 info->bootable = 0;
524                 strcpy((char *)info->type, BOOT_PART_TYPE);
525                 strcpy((char *)info->name, "Sandbox host");
526 #ifdef CONFIG_PARTITION_UUIDS
527                 info->uuid[0] = 0;
528 #endif
529
530                 return 0;
531         }
532
533         /* If no dev_part_str, use bootdevice environment variable */
534         if (!dev_part_str || !strlen(dev_part_str) ||
535             !strcmp(dev_part_str, "-"))
536                 dev_part_str = getenv("bootdevice");
537
538         /* If still no dev_part_str, it's an error */
539         if (!dev_part_str) {
540                 printf("** No device specified **\n");
541                 goto cleanup;
542         }
543
544         /* Separate device and partition ID specification */
545         part_str = strchr(dev_part_str, ':');
546         if (part_str) {
547                 dup_str = strdup(dev_part_str);
548                 dup_str[part_str - dev_part_str] = 0;
549                 dev_str = dup_str;
550                 part_str++;
551         } else {
552                 dev_str = dev_part_str;
553         }
554
555         /* Look up the device */
556         dev = get_device(ifname, dev_str, dev_desc);
557         if (dev < 0)
558                 goto cleanup;
559
560         /* Convert partition ID string to number */
561         if (!part_str || !*part_str) {
562                 part = PART_UNSPECIFIED;
563         } else if (!strcmp(part_str, "auto")) {
564                 part = PART_AUTO;
565         } else {
566                 /* Something specified -> use exactly that */
567                 part = (int)simple_strtoul(part_str, &ep, 16);
568                 /*
569                  * Less than whole string converted,
570                  * or request for whole device, but caller requires partition.
571                  */
572                 if (*ep || (part == 0 && !allow_whole_dev)) {
573                         printf("** Bad partition specification %s %s **\n",
574                             ifname, dev_part_str);
575                         goto cleanup;
576                 }
577         }
578
579         /*
580          * No partition table on device,
581          * or user requested partition 0 (entire device).
582          */
583         if (((*dev_desc)->part_type == PART_TYPE_UNKNOWN) ||
584             (part == 0)) {
585                 if (!(*dev_desc)->lba) {
586                         printf("** Bad device size - %s %s **\n", ifname,
587                                dev_str);
588                         goto cleanup;
589                 }
590
591                 /*
592                  * If user specified a partition ID other than 0,
593                  * or the calling command only accepts partitions,
594                  * it's an error.
595                  */
596                 if ((part > 0) || (!allow_whole_dev)) {
597                         printf("** No partition table - %s %s **\n", ifname,
598                                dev_str);
599                         goto cleanup;
600                 }
601
602                 (*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
603
604                 info->start = 0;
605                 info->size = (*dev_desc)->lba;
606                 info->blksz = (*dev_desc)->blksz;
607                 info->bootable = 0;
608                 strcpy((char *)info->type, BOOT_PART_TYPE);
609                 strcpy((char *)info->name, "Whole Disk");
610 #ifdef CONFIG_PARTITION_UUIDS
611                 info->uuid[0] = 0;
612 #endif
613
614                 ret = 0;
615                 goto cleanup;
616         }
617
618         /*
619          * Now there's known to be a partition table,
620          * not specifying a partition means to pick partition 1.
621          */
622         if (part == PART_UNSPECIFIED)
623                 part = 1;
624
625         /*
626          * If user didn't specify a partition number, or did specify something
627          * other than "auto", use that partition number directly.
628          */
629         if (part != PART_AUTO) {
630                 ret = get_partition_info(*dev_desc, part, info);
631                 if (ret) {
632                         printf("** Invalid partition %d **\n", part);
633                         goto cleanup;
634                 }
635         } else {
636                 /*
637                  * Find the first bootable partition.
638                  * If none are bootable, fall back to the first valid partition.
639                  */
640                 part = 0;
641                 for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
642                         ret = get_partition_info(*dev_desc, p, info);
643                         if (ret)
644                                 continue;
645
646                         /*
647                          * First valid partition, or new better partition?
648                          * If so, save partition ID.
649                          */
650                         if (!part || info->bootable)
651                                 part = p;
652
653                         /* Best possible partition? Stop searching. */
654                         if (info->bootable)
655                                 break;
656
657                         /*
658                          * We now need to search further for best possible.
659                          * If we what we just queried was the best so far,
660                          * save the info since we over-write it next loop.
661                          */
662                         if (part == p)
663                                 tmpinfo = *info;
664                 }
665                 /* If we found any acceptable partition */
666                 if (part) {
667                         /*
668                          * If we searched all possible partition IDs,
669                          * return the first valid partition we found.
670                          */
671                         if (p == MAX_SEARCH_PARTITIONS + 1)
672                                 *info = tmpinfo;
673                 } else {
674                         printf("** No valid partitions found **\n");
675                         ret = -1;
676                         goto cleanup;
677                 }
678         }
679         if (strncmp((char *)info->type, BOOT_PART_TYPE, sizeof(info->type)) != 0) {
680                 printf("** Invalid partition type \"%.32s\""
681                         " (expect \"" BOOT_PART_TYPE "\")\n",
682                         info->type);
683                 ret  = -1;
684                 goto cleanup;
685         }
686
687         (*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
688
689         ret = part;
690         goto cleanup;
691
692 cleanup:
693         free(dup_str);
694         return ret;
695 }