Merge branch 'next'
[platform/kernel/u-boot.git] / cmd / ubi.c
1 /*
2  * Unsorted Block Image commands
3  *
4  *  Copyright (C) 2008 Samsung Electronics
5  *  Kyungmin Park <kyungmin.park@samsung.com>
6  *
7  * Copyright 2008-2009 Stefan Roese <sr@denx.de>, DENX Software Engineering
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License version 2 as
11  * published by the Free Software Foundation.
12  */
13
14 #include <common.h>
15 #include <command.h>
16 #include <exports.h>
17 #include <memalign.h>
18 #include <mtd.h>
19 #include <nand.h>
20 #include <onenand_uboot.h>
21 #include <linux/mtd/mtd.h>
22 #include <linux/mtd/partitions.h>
23 #include <linux/err.h>
24 #include <ubi_uboot.h>
25 #include <linux/errno.h>
26 #include <jffs2/load_kernel.h>
27
28 #undef ubi_msg
29 #define ubi_msg(fmt, ...) printf("UBI: " fmt "\n", ##__VA_ARGS__)
30
31 /* Private own data */
32 static struct ubi_device *ubi;
33
34 #ifdef CONFIG_CMD_UBIFS
35 #include <ubifs_uboot.h>
36 #endif
37
38 static void display_volume_info(struct ubi_device *ubi)
39 {
40         int i;
41
42         for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
43                 if (!ubi->volumes[i])
44                         continue;       /* Empty record */
45                 ubi_dump_vol_info(ubi->volumes[i]);
46         }
47 }
48
49 static void display_ubi_info(struct ubi_device *ubi)
50 {
51         ubi_msg("MTD device name:            \"%s\"", ubi->mtd->name);
52         ubi_msg("MTD device size:            %llu MiB", ubi->flash_size >> 20);
53         ubi_msg("physical eraseblock size:   %d bytes (%d KiB)",
54                         ubi->peb_size, ubi->peb_size >> 10);
55         ubi_msg("logical eraseblock size:    %d bytes", ubi->leb_size);
56         ubi_msg("number of good PEBs:        %d", ubi->good_peb_count);
57         ubi_msg("number of bad PEBs:         %d", ubi->bad_peb_count);
58         ubi_msg("smallest flash I/O unit:    %d", ubi->min_io_size);
59         ubi_msg("VID header offset:          %d (aligned %d)",
60                         ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
61         ubi_msg("data offset:                %d", ubi->leb_start);
62         ubi_msg("max. allowed volumes:       %d", ubi->vtbl_slots);
63         ubi_msg("wear-leveling threshold:    %d", CONFIG_MTD_UBI_WL_THRESHOLD);
64         ubi_msg("number of internal volumes: %d", UBI_INT_VOL_COUNT);
65         ubi_msg("number of user volumes:     %d",
66                         ubi->vol_count - UBI_INT_VOL_COUNT);
67         ubi_msg("available PEBs:             %d", ubi->avail_pebs);
68         ubi_msg("total number of reserved PEBs: %d", ubi->rsvd_pebs);
69         ubi_msg("number of PEBs reserved for bad PEB handling: %d",
70                         ubi->beb_rsvd_pebs);
71         ubi_msg("max/mean erase counter: %d/%d", ubi->max_ec, ubi->mean_ec);
72 }
73
74 static int ubi_info(int layout)
75 {
76         if (layout)
77                 display_volume_info(ubi);
78         else
79                 display_ubi_info(ubi);
80
81         return 0;
82 }
83
84 static int ubi_check_volumename(const struct ubi_volume *vol, char *name)
85 {
86         return strcmp(vol->name, name);
87 }
88
89 static int ubi_check(char *name)
90 {
91         int i;
92
93         for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
94                 if (!ubi->volumes[i])
95                         continue;       /* Empty record */
96
97                 if (!ubi_check_volumename(ubi->volumes[i], name))
98                         return 0;
99         }
100
101         return 1;
102 }
103
104
105 static int verify_mkvol_req(const struct ubi_device *ubi,
106                             const struct ubi_mkvol_req *req)
107 {
108         int n, err = EINVAL;
109
110         if (req->bytes < 0 || req->alignment < 0 || req->vol_type < 0 ||
111             req->name_len < 0)
112                 goto bad;
113
114         if ((req->vol_id < 0 || req->vol_id >= ubi->vtbl_slots) &&
115             req->vol_id != UBI_VOL_NUM_AUTO)
116                 goto bad;
117
118         if (req->alignment == 0)
119                 goto bad;
120
121         if (req->bytes == 0) {
122                 printf("No space left in UBI device!\n");
123                 err = ENOMEM;
124                 goto bad;
125         }
126
127         if (req->vol_type != UBI_DYNAMIC_VOLUME &&
128             req->vol_type != UBI_STATIC_VOLUME)
129                 goto bad;
130
131         if (req->alignment > ubi->leb_size)
132                 goto bad;
133
134         n = req->alignment % ubi->min_io_size;
135         if (req->alignment != 1 && n)
136                 goto bad;
137
138         if (req->name_len > UBI_VOL_NAME_MAX) {
139                 printf("Name too long!\n");
140                 err = ENAMETOOLONG;
141                 goto bad;
142         }
143
144         return 0;
145 bad:
146         return err;
147 }
148
149 static int ubi_create_vol(char *volume, int64_t size, int dynamic, int vol_id)
150 {
151         struct ubi_mkvol_req req;
152         int err;
153
154         if (dynamic)
155                 req.vol_type = UBI_DYNAMIC_VOLUME;
156         else
157                 req.vol_type = UBI_STATIC_VOLUME;
158
159         req.vol_id = vol_id;
160         req.alignment = 1;
161         req.bytes = size;
162
163         strcpy(req.name, volume);
164         req.name_len = strlen(volume);
165         req.name[req.name_len] = '\0';
166         req.padding1 = 0;
167         /* It's duplicated at drivers/mtd/ubi/cdev.c */
168         err = verify_mkvol_req(ubi, &req);
169         if (err) {
170                 printf("verify_mkvol_req failed %d\n", err);
171                 return err;
172         }
173         printf("Creating %s volume %s of size %lld\n",
174                 dynamic ? "dynamic" : "static", volume, size);
175         /* Call real ubi create volume */
176         return ubi_create_volume(ubi, &req);
177 }
178
179 static struct ubi_volume *ubi_find_volume(char *volume)
180 {
181         struct ubi_volume *vol = NULL;
182         int i;
183
184         for (i = 0; i < ubi->vtbl_slots; i++) {
185                 vol = ubi->volumes[i];
186                 if (vol && !strcmp(vol->name, volume))
187                         return vol;
188         }
189
190         printf("Volume %s not found!\n", volume);
191         return NULL;
192 }
193
194 static int ubi_remove_vol(char *volume)
195 {
196         int err, reserved_pebs, i;
197         struct ubi_volume *vol;
198
199         vol = ubi_find_volume(volume);
200         if (vol == NULL)
201                 return ENODEV;
202
203         printf("Remove UBI volume %s (id %d)\n", vol->name, vol->vol_id);
204
205         if (ubi->ro_mode) {
206                 printf("It's read-only mode\n");
207                 err = EROFS;
208                 goto out_err;
209         }
210
211         err = ubi_change_vtbl_record(ubi, vol->vol_id, NULL);
212         if (err) {
213                 printf("Error changing Vol tabel record err=%x\n", err);
214                 goto out_err;
215         }
216         reserved_pebs = vol->reserved_pebs;
217         for (i = 0; i < vol->reserved_pebs; i++) {
218                 err = ubi_eba_unmap_leb(ubi, vol, i);
219                 if (err)
220                         goto out_err;
221         }
222
223         kfree(vol->eba_tbl);
224         ubi->volumes[vol->vol_id]->eba_tbl = NULL;
225         ubi->volumes[vol->vol_id] = NULL;
226
227         ubi->rsvd_pebs -= reserved_pebs;
228         ubi->avail_pebs += reserved_pebs;
229         i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
230         if (i > 0) {
231                 i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
232                 ubi->avail_pebs -= i;
233                 ubi->rsvd_pebs += i;
234                 ubi->beb_rsvd_pebs += i;
235                 if (i > 0)
236                         ubi_msg("reserve more %d PEBs", i);
237         }
238         ubi->vol_count -= 1;
239
240         return 0;
241 out_err:
242         ubi_err(ubi, "cannot remove volume %s, error %d", volume, err);
243         if (err < 0)
244                 err = -err;
245         return err;
246 }
247
248 static int ubi_volume_continue_write(char *volume, void *buf, size_t size)
249 {
250         int err = 1;
251         struct ubi_volume *vol;
252
253         vol = ubi_find_volume(volume);
254         if (vol == NULL)
255                 return ENODEV;
256
257         err = ubi_more_update_data(ubi, vol, buf, size);
258         if (err < 0) {
259                 printf("Couldnt or partially wrote data\n");
260                 return -err;
261         }
262
263         if (err) {
264                 size = err;
265
266                 err = ubi_check_volume(ubi, vol->vol_id);
267                 if (err < 0)
268                         return -err;
269
270                 if (err) {
271                         ubi_warn(ubi, "volume %d on UBI device %d is corrupt",
272                                  vol->vol_id, ubi->ubi_num);
273                         vol->corrupted = 1;
274                 }
275
276                 vol->checked = 1;
277                 ubi_gluebi_updated(vol);
278         }
279
280         return 0;
281 }
282
283 int ubi_volume_begin_write(char *volume, void *buf, size_t size,
284         size_t full_size)
285 {
286         int err = 1;
287         int rsvd_bytes = 0;
288         struct ubi_volume *vol;
289
290         vol = ubi_find_volume(volume);
291         if (vol == NULL)
292                 return ENODEV;
293
294         rsvd_bytes = vol->reserved_pebs * (ubi->leb_size - vol->data_pad);
295         if (size > rsvd_bytes) {
296                 printf("size > volume size! Aborting!\n");
297                 return EINVAL;
298         }
299
300         err = ubi_start_update(ubi, vol, full_size);
301         if (err < 0) {
302                 printf("Cannot start volume update\n");
303                 return -err;
304         }
305
306         return ubi_volume_continue_write(volume, buf, size);
307 }
308
309 int ubi_volume_write(char *volume, void *buf, size_t size)
310 {
311         return ubi_volume_begin_write(volume, buf, size, size);
312 }
313
314 int ubi_volume_read(char *volume, char *buf, size_t size)
315 {
316         int err, lnum, off, len, tbuf_size;
317         void *tbuf;
318         unsigned long long tmp;
319         struct ubi_volume *vol;
320         loff_t offp = 0;
321         size_t len_read;
322
323         vol = ubi_find_volume(volume);
324         if (vol == NULL)
325                 return ENODEV;
326
327         if (vol->updating) {
328                 printf("updating");
329                 return EBUSY;
330         }
331         if (vol->upd_marker) {
332                 printf("damaged volume, update marker is set");
333                 return EBADF;
334         }
335         if (offp == vol->used_bytes)
336                 return 0;
337
338         if (size == 0) {
339                 printf("No size specified -> Using max size (%lld)\n", vol->used_bytes);
340                 size = vol->used_bytes;
341         }
342
343         printf("Read %zu bytes from volume %s to %p\n", size, volume, buf);
344
345         if (vol->corrupted)
346                 printf("read from corrupted volume %d", vol->vol_id);
347         if (offp + size > vol->used_bytes)
348                 size = vol->used_bytes - offp;
349
350         tbuf_size = vol->usable_leb_size;
351         if (size < tbuf_size)
352                 tbuf_size = ALIGN(size, ubi->min_io_size);
353         tbuf = malloc_cache_aligned(tbuf_size);
354         if (!tbuf) {
355                 printf("NO MEM\n");
356                 return ENOMEM;
357         }
358         len = size > tbuf_size ? tbuf_size : size;
359
360         tmp = offp;
361         off = do_div(tmp, vol->usable_leb_size);
362         lnum = tmp;
363         len_read = size;
364         do {
365                 if (off + len >= vol->usable_leb_size)
366                         len = vol->usable_leb_size - off;
367
368                 err = ubi_eba_read_leb(ubi, vol, lnum, tbuf, off, len, 0);
369                 if (err) {
370                         printf("read err %x\n", err);
371                         err = -err;
372                         break;
373                 }
374                 off += len;
375                 if (off == vol->usable_leb_size) {
376                         lnum += 1;
377                         off -= vol->usable_leb_size;
378                 }
379
380                 size -= len;
381                 offp += len;
382
383                 memcpy(buf, tbuf, len);
384
385                 buf += len;
386                 len = size > tbuf_size ? tbuf_size : size;
387         } while (size);
388
389         if (!size)
390                 env_set_hex("filesize", len_read);
391
392         free(tbuf);
393         return err;
394 }
395
396 static int ubi_dev_scan(struct mtd_info *info, const char *vid_header_offset)
397 {
398         char ubi_mtd_param_buffer[80];
399         int err;
400
401         if (!vid_header_offset)
402                 sprintf(ubi_mtd_param_buffer, "%s", info->name);
403         else
404                 sprintf(ubi_mtd_param_buffer, "%s,%s", info->name,
405                         vid_header_offset);
406
407         err = ubi_mtd_param_parse(ubi_mtd_param_buffer, NULL);
408         if (err)
409                 return -err;
410
411         err = ubi_init();
412         if (err)
413                 return -err;
414
415         return 0;
416 }
417
418 int ubi_detach(void)
419 {
420 #ifdef CONFIG_CMD_UBIFS
421         /*
422          * Automatically unmount UBIFS partition when user
423          * changes the UBI device. Otherwise the following
424          * UBIFS commands will crash.
425          */
426         if (ubifs_is_mounted())
427                 cmd_ubifs_umount();
428 #endif
429
430         /*
431          * Call ubi_exit() before re-initializing the UBI subsystem
432          */
433         if (ubi)
434                 ubi_exit();
435
436         ubi = NULL;
437
438         return 0;
439 }
440
441 int ubi_part(char *part_name, const char *vid_header_offset)
442 {
443         struct mtd_info *mtd;
444         int err = 0;
445
446         ubi_detach();
447
448         mtd_probe_devices();
449         mtd = get_mtd_device_nm(part_name);
450         if (IS_ERR(mtd)) {
451                 printf("Partition %s not found!\n", part_name);
452                 return 1;
453         }
454         put_mtd_device(mtd);
455
456         err = ubi_dev_scan(mtd, vid_header_offset);
457         if (err) {
458                 printf("UBI init error %d\n", err);
459                 printf("Please check, if the correct MTD partition is used (size big enough?)\n");
460                 return err;
461         }
462
463         ubi = ubi_devices[0];
464
465         return 0;
466 }
467
468 static int do_ubi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
469 {
470         int64_t size = 0;
471         ulong addr = 0;
472
473         if (argc < 2)
474                 return CMD_RET_USAGE;
475
476
477         if (strcmp(argv[1], "detach") == 0) {
478                 if (argc < 2)
479                         return CMD_RET_USAGE;
480
481                 return ubi_detach();
482         }
483
484
485         if (strcmp(argv[1], "part") == 0) {
486                 const char *vid_header_offset = NULL;
487
488                 /* Print current partition */
489                 if (argc == 2) {
490                         if (!ubi) {
491                                 printf("Error, no UBI device selected!\n");
492                                 return 1;
493                         }
494
495                         printf("Device %d: %s, MTD partition %s\n",
496                                ubi->ubi_num, ubi->ubi_name, ubi->mtd->name);
497                         return 0;
498                 }
499
500                 if (argc < 3)
501                         return CMD_RET_USAGE;
502
503                 if (argc > 3)
504                         vid_header_offset = argv[3];
505
506                 return ubi_part(argv[2], vid_header_offset);
507         }
508
509         if ((strcmp(argv[1], "part") != 0) && !ubi) {
510                 printf("Error, no UBI device selected!\n");
511                 return 1;
512         }
513
514         if (strcmp(argv[1], "info") == 0) {
515                 int layout = 0;
516                 if (argc > 2 && !strncmp(argv[2], "l", 1))
517                         layout = 1;
518                 return ubi_info(layout);
519         }
520
521         if (strcmp(argv[1], "check") == 0) {
522                 if (argc > 2)
523                         return ubi_check(argv[2]);
524
525                 printf("Error, no volume name passed\n");
526                 return 1;
527         }
528
529         if (strncmp(argv[1], "create", 6) == 0) {
530                 int dynamic = 1;        /* default: dynamic volume */
531                 int id = UBI_VOL_NUM_AUTO;
532
533                 /* Use maximum available size */
534                 size = 0;
535
536                 /* E.g., create volume size type vol_id */
537                 if (argc == 6) {
538                         id = simple_strtoull(argv[5], NULL, 16);
539                         argc--;
540                 }
541
542                 /* E.g., create volume size type */
543                 if (argc == 5) {
544                         if (strncmp(argv[4], "s", 1) == 0)
545                                 dynamic = 0;
546                         else if (strncmp(argv[4], "d", 1) != 0) {
547                                 printf("Incorrect type\n");
548                                 return 1;
549                         }
550                         argc--;
551                 }
552                 /* E.g., create volume size */
553                 if (argc == 4) {
554                         if (argv[3][0] != '-')
555                                 size = simple_strtoull(argv[3], NULL, 16);
556                         argc--;
557                 }
558                 /* Use maximum available size */
559                 if (!size) {
560                         size = (int64_t)ubi->avail_pebs * ubi->leb_size;
561                         printf("No size specified -> Using max size (%lld)\n", size);
562                 }
563                 /* E.g., create volume */
564                 if (argc == 3)
565                         return ubi_create_vol(argv[2], size, dynamic, id);
566         }
567
568         if (strncmp(argv[1], "remove", 6) == 0) {
569                 /* E.g., remove volume */
570                 if (argc == 3)
571                         return ubi_remove_vol(argv[2]);
572         }
573
574         if (strncmp(argv[1], "write", 5) == 0) {
575                 int ret;
576
577                 if (argc < 5) {
578                         printf("Please see usage\n");
579                         return 1;
580                 }
581
582                 addr = simple_strtoul(argv[2], NULL, 16);
583                 size = simple_strtoul(argv[4], NULL, 16);
584
585                 if (strlen(argv[1]) == 10 &&
586                     strncmp(argv[1] + 5, ".part", 5) == 0) {
587                         if (argc < 6) {
588                                 ret = ubi_volume_continue_write(argv[3],
589                                                 (void *)addr, size);
590                         } else {
591                                 size_t full_size;
592                                 full_size = simple_strtoul(argv[5], NULL, 16);
593                                 ret = ubi_volume_begin_write(argv[3],
594                                                 (void *)addr, size, full_size);
595                         }
596                 } else {
597                         ret = ubi_volume_write(argv[3], (void *)addr, size);
598                 }
599                 if (!ret) {
600                         printf("%lld bytes written to volume %s\n", size,
601                                argv[3]);
602                 }
603
604                 return ret;
605         }
606
607         if (strncmp(argv[1], "read", 4) == 0) {
608                 size = 0;
609
610                 /* E.g., read volume size */
611                 if (argc == 5) {
612                         size = simple_strtoul(argv[4], NULL, 16);
613                         argc--;
614                 }
615
616                 /* E.g., read volume */
617                 if (argc == 4) {
618                         addr = simple_strtoul(argv[2], NULL, 16);
619                         argc--;
620                 }
621
622                 if (argc == 3) {
623                         return ubi_volume_read(argv[3], (char *)addr, size);
624                 }
625         }
626
627         printf("Please see usage\n");
628         return 1;
629 }
630
631 U_BOOT_CMD(
632         ubi, 6, 1, do_ubi,
633         "ubi commands",
634         "detach"
635                 " - detach ubi from a mtd partition\n"
636         "ubi part [part] [offset]\n"
637                 " - Show or set current partition (with optional VID"
638                 " header offset)\n"
639         "ubi info [l[ayout]]"
640                 " - Display volume and ubi layout information\n"
641         "ubi check volumename"
642                 " - check if volumename exists\n"
643         "ubi create[vol] volume [size] [type] [id]\n"
644                 " - create volume name with size ('-' for maximum"
645                 " available size)\n"
646         "ubi write[vol] address volume size"
647                 " - Write volume from address with size\n"
648         "ubi write.part address volume size [fullsize]\n"
649                 " - Write part of a volume from address\n"
650         "ubi read[vol] address volume [size]"
651                 " - Read volume to address with size\n"
652         "ubi remove[vol] volume"
653                 " - Remove volume\n"
654         "[Legends]\n"
655         " volume: character name\n"
656         " size: specified in bytes\n"
657         " type: s[tatic] or d[ynamic] (default=dynamic)"
658 );