xref: /openbmc/u-boot/cmd/ubi.c (revision cbd2fba1) 
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 );
659