xref: /openbmc/u-boot/cmd/ubi.c (revision ecab65e4) 
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 static int verify_mkvol_req(const struct ubi_device *ubi,
105 			    const struct ubi_mkvol_req *req)
106 {
107 	int n, err = EINVAL;
108 
109 	if (req->bytes < 0 || req->alignment < 0 || req->vol_type < 0 ||
110 	    req->name_len < 0)
111 		goto bad;
112 
113 	if ((req->vol_id < 0 || req->vol_id >= ubi->vtbl_slots) &&
114 	    req->vol_id != UBI_VOL_NUM_AUTO)
115 		goto bad;
116 
117 	if (req->alignment == 0)
118 		goto bad;
119 
120 	if (req->bytes == 0) {
121 		printf("No space left in UBI device!\n");
122 		err = ENOMEM;
123 		goto bad;
124 	}
125 
126 	if (req->vol_type != UBI_DYNAMIC_VOLUME &&
127 	    req->vol_type != UBI_STATIC_VOLUME)
128 		goto bad;
129 
130 	if (req->alignment > ubi->leb_size)
131 		goto bad;
132 
133 	n = req->alignment % ubi->min_io_size;
134 	if (req->alignment != 1 && n)
135 		goto bad;
136 
137 	if (req->name_len > UBI_VOL_NAME_MAX) {
138 		printf("Name too long!\n");
139 		err = ENAMETOOLONG;
140 		goto bad;
141 	}
142 
143 	return 0;
144 bad:
145 	return err;
146 }
147 
148 static int ubi_create_vol(char *volume, int64_t size, int dynamic, int vol_id)
149 {
150 	struct ubi_mkvol_req req;
151 	int err;
152 
153 	if (dynamic)
154 		req.vol_type = UBI_DYNAMIC_VOLUME;
155 	else
156 		req.vol_type = UBI_STATIC_VOLUME;
157 
158 	req.vol_id = vol_id;
159 	req.alignment = 1;
160 	req.bytes = size;
161 
162 	strcpy(req.name, volume);
163 	req.name_len = strlen(volume);
164 	req.name[req.name_len] = '\0';
165 	req.padding1 = 0;
166 	/* It's duplicated at drivers/mtd/ubi/cdev.c */
167 	err = verify_mkvol_req(ubi, &req);
168 	if (err) {
169 		printf("verify_mkvol_req failed %d\n", err);
170 		return err;
171 	}
172 	printf("Creating %s volume %s of size %lld\n",
173 		dynamic ? "dynamic" : "static", volume, size);
174 	/* Call real ubi create volume */
175 	return ubi_create_volume(ubi, &req);
176 }
177 
178 static struct ubi_volume *ubi_find_volume(char *volume)
179 {
180 	struct ubi_volume *vol = NULL;
181 	int i;
182 
183 	for (i = 0; i < ubi->vtbl_slots; i++) {
184 		vol = ubi->volumes[i];
185 		if (vol && !strcmp(vol->name, volume))
186 			return vol;
187 	}
188 
189 	printf("Volume %s not found!\n", volume);
190 	return NULL;
191 }
192 
193 static int ubi_remove_vol(char *volume)
194 {
195 	int err, reserved_pebs, i;
196 	struct ubi_volume *vol;
197 
198 	vol = ubi_find_volume(volume);
199 	if (vol == NULL)
200 		return ENODEV;
201 
202 	printf("Remove UBI volume %s (id %d)\n", vol->name, vol->vol_id);
203 
204 	if (ubi->ro_mode) {
205 		printf("It's read-only mode\n");
206 		err = EROFS;
207 		goto out_err;
208 	}
209 
210 	err = ubi_change_vtbl_record(ubi, vol->vol_id, NULL);
211 	if (err) {
212 		printf("Error changing Vol tabel record err=%x\n", err);
213 		goto out_err;
214 	}
215 	reserved_pebs = vol->reserved_pebs;
216 	for (i = 0; i < vol->reserved_pebs; i++) {
217 		err = ubi_eba_unmap_leb(ubi, vol, i);
218 		if (err)
219 			goto out_err;
220 	}
221 
222 	kfree(vol->eba_tbl);
223 	ubi->volumes[vol->vol_id]->eba_tbl = NULL;
224 	ubi->volumes[vol->vol_id] = NULL;
225 
226 	ubi->rsvd_pebs -= reserved_pebs;
227 	ubi->avail_pebs += reserved_pebs;
228 	i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
229 	if (i > 0) {
230 		i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
231 		ubi->avail_pebs -= i;
232 		ubi->rsvd_pebs += i;
233 		ubi->beb_rsvd_pebs += i;
234 		if (i > 0)
235 			ubi_msg("reserve more %d PEBs", i);
236 	}
237 	ubi->vol_count -= 1;
238 
239 	return 0;
240 out_err:
241 	ubi_err(ubi, "cannot remove volume %s, error %d", volume, err);
242 	if (err < 0)
243 		err = -err;
244 	return err;
245 }
246 
247 static int ubi_volume_continue_write(char *volume, void *buf, size_t size)
248 {
249 	int err = 1;
250 	struct ubi_volume *vol;
251 
252 	vol = ubi_find_volume(volume);
253 	if (vol == NULL)
254 		return ENODEV;
255 
256 	err = ubi_more_update_data(ubi, vol, buf, size);
257 	if (err < 0) {
258 		printf("Couldnt or partially wrote data\n");
259 		return -err;
260 	}
261 
262 	if (err) {
263 		size = err;
264 
265 		err = ubi_check_volume(ubi, vol->vol_id);
266 		if (err < 0)
267 			return -err;
268 
269 		if (err) {
270 			ubi_warn(ubi, "volume %d on UBI device %d is corrupt",
271 				 vol->vol_id, ubi->ubi_num);
272 			vol->corrupted = 1;
273 		}
274 
275 		vol->checked = 1;
276 		ubi_gluebi_updated(vol);
277 	}
278 
279 	return 0;
280 }
281 
282 int ubi_volume_begin_write(char *volume, void *buf, size_t size,
283 	size_t full_size)
284 {
285 	int err = 1;
286 	int rsvd_bytes = 0;
287 	struct ubi_volume *vol;
288 
289 	vol = ubi_find_volume(volume);
290 	if (vol == NULL)
291 		return ENODEV;
292 
293 	rsvd_bytes = vol->reserved_pebs * (ubi->leb_size - vol->data_pad);
294 	if (size > rsvd_bytes) {
295 		printf("size > volume size! Aborting!\n");
296 		return EINVAL;
297 	}
298 
299 	err = ubi_start_update(ubi, vol, full_size);
300 	if (err < 0) {
301 		printf("Cannot start volume update\n");
302 		return -err;
303 	}
304 
305 	return ubi_volume_continue_write(volume, buf, size);
306 }
307 
308 int ubi_volume_write(char *volume, void *buf, size_t size)
309 {
310 	return ubi_volume_begin_write(volume, buf, size, size);
311 }
312 
313 int ubi_volume_read(char *volume, char *buf, size_t size)
314 {
315 	int err, lnum, off, len, tbuf_size;
316 	void *tbuf;
317 	unsigned long long tmp;
318 	struct ubi_volume *vol;
319 	loff_t offp = 0;
320 	size_t len_read;
321 
322 	vol = ubi_find_volume(volume);
323 	if (vol == NULL)
324 		return ENODEV;
325 
326 	if (vol->updating) {
327 		printf("updating");
328 		return EBUSY;
329 	}
330 	if (vol->upd_marker) {
331 		printf("damaged volume, update marker is set");
332 		return EBADF;
333 	}
334 	if (offp == vol->used_bytes)
335 		return 0;
336 
337 	if (size == 0) {
338 		printf("No size specified -> Using max size (%lld)\n", vol->used_bytes);
339 		size = vol->used_bytes;
340 	}
341 
342 	printf("Read %zu bytes from volume %s to %p\n", size, volume, buf);
343 
344 	if (vol->corrupted)
345 		printf("read from corrupted volume %d", vol->vol_id);
346 	if (offp + size > vol->used_bytes)
347 		size = vol->used_bytes - offp;
348 
349 	tbuf_size = vol->usable_leb_size;
350 	if (size < tbuf_size)
351 		tbuf_size = ALIGN(size, ubi->min_io_size);
352 	tbuf = malloc_cache_aligned(tbuf_size);
353 	if (!tbuf) {
354 		printf("NO MEM\n");
355 		return ENOMEM;
356 	}
357 	len = size > tbuf_size ? tbuf_size : size;
358 
359 	tmp = offp;
360 	off = do_div(tmp, vol->usable_leb_size);
361 	lnum = tmp;
362 	len_read = size;
363 	do {
364 		if (off + len >= vol->usable_leb_size)
365 			len = vol->usable_leb_size - off;
366 
367 		err = ubi_eba_read_leb(ubi, vol, lnum, tbuf, off, len, 0);
368 		if (err) {
369 			printf("read err %x\n", err);
370 			err = -err;
371 			break;
372 		}
373 		off += len;
374 		if (off == vol->usable_leb_size) {
375 			lnum += 1;
376 			off -= vol->usable_leb_size;
377 		}
378 
379 		size -= len;
380 		offp += len;
381 
382 		memcpy(buf, tbuf, len);
383 
384 		buf += len;
385 		len = size > tbuf_size ? tbuf_size : size;
386 	} while (size);
387 
388 	if (!size)
389 		env_set_hex("filesize", len_read);
390 
391 	free(tbuf);
392 	return err;
393 }
394 
395 static int ubi_dev_scan(struct mtd_info *info, const char *vid_header_offset)
396 {
397 	char ubi_mtd_param_buffer[80];
398 	int err;
399 
400 	if (!vid_header_offset)
401 		sprintf(ubi_mtd_param_buffer, "%s", info->name);
402 	else
403 		sprintf(ubi_mtd_param_buffer, "%s,%s", info->name,
404 			vid_header_offset);
405 
406 	err = ubi_mtd_param_parse(ubi_mtd_param_buffer, NULL);
407 	if (err)
408 		return -err;
409 
410 	err = ubi_init();
411 	if (err)
412 		return -err;
413 
414 	return 0;
415 }
416 
417 static int ubi_detach(void)
418 {
419 #ifdef CONFIG_CMD_UBIFS
420 	/*
421 	 * Automatically unmount UBIFS partition when user
422 	 * changes the UBI device. Otherwise the following
423 	 * UBIFS commands will crash.
424 	 */
425 	if (ubifs_is_mounted())
426 		cmd_ubifs_umount();
427 #endif
428 
429 	/*
430 	 * Call ubi_exit() before re-initializing the UBI subsystem
431 	 */
432 	if (ubi)
433 		ubi_exit();
434 
435 	ubi = NULL;
436 
437 	return 0;
438 }
439 
440 int ubi_part(char *part_name, const char *vid_header_offset)
441 {
442 	struct mtd_info *mtd;
443 	int err = 0;
444 
445 	ubi_detach();
446 
447 	mtd_probe_devices();
448 	mtd = get_mtd_device_nm(part_name);
449 	if (IS_ERR(mtd)) {
450 		printf("Partition %s not found!\n", part_name);
451 		return 1;
452 	}
453 	put_mtd_device(mtd);
454 
455 	err = ubi_dev_scan(mtd, vid_header_offset);
456 	if (err) {
457 		printf("UBI init error %d\n", err);
458 		printf("Please check, if the correct MTD partition is used (size big enough?)\n");
459 		return err;
460 	}
461 
462 	ubi = ubi_devices[0];
463 
464 	return 0;
465 }
466 
467 static int do_ubi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
468 {
469 	int64_t size = 0;
470 	ulong addr = 0;
471 
472 	if (argc < 2)
473 		return CMD_RET_USAGE;
474 
475 	if (strcmp(argv[1], "detach") == 0) {
476 		if (argc < 2)
477 			return CMD_RET_USAGE;
478 
479 		return ubi_detach();
480 	}
481 
482 	if (strcmp(argv[1], "part") == 0) {
483 		const char *vid_header_offset = NULL;
484 
485 		/* Print current partition */
486 		if (argc == 2) {
487 			if (!ubi) {
488 				printf("Error, no UBI device selected!\n");
489 				return 1;
490 			}
491 
492 			printf("Device %d: %s, MTD partition %s\n",
493 			       ubi->ubi_num, ubi->ubi_name, ubi->mtd->name);
494 			return 0;
495 		}
496 
497 		if (argc < 3)
498 			return CMD_RET_USAGE;
499 
500 		if (argc > 3)
501 			vid_header_offset = argv[3];
502 
503 		return ubi_part(argv[2], vid_header_offset);
504 	}
505 
506 	if ((strcmp(argv[1], "part") != 0) && !ubi) {
507 		printf("Error, no UBI device selected!\n");
508 		return 1;
509 	}
510 
511 	if (strcmp(argv[1], "info") == 0) {
512 		int layout = 0;
513 		if (argc > 2 && !strncmp(argv[2], "l", 1))
514 			layout = 1;
515 		return ubi_info(layout);
516 	}
517 
518 	if (strcmp(argv[1], "check") == 0) {
519 		if (argc > 2)
520 			return ubi_check(argv[2]);
521 
522 		printf("Error, no volume name passed\n");
523 		return 1;
524 	}
525 
526 	if (strncmp(argv[1], "create", 6) == 0) {
527 		int dynamic = 1;	/* default: dynamic volume */
528 		int id = UBI_VOL_NUM_AUTO;
529 
530 		/* Use maximum available size */
531 		size = 0;
532 
533 		/* E.g., create volume size type vol_id */
534 		if (argc == 6) {
535 			id = simple_strtoull(argv[5], NULL, 16);
536 			argc--;
537 		}
538 
539 		/* E.g., create volume size type */
540 		if (argc == 5) {
541 			if (strncmp(argv[4], "s", 1) == 0)
542 				dynamic = 0;
543 			else if (strncmp(argv[4], "d", 1) != 0) {
544 				printf("Incorrect type\n");
545 				return 1;
546 			}
547 			argc--;
548 		}
549 		/* E.g., create volume size */
550 		if (argc == 4) {
551 			if (argv[3][0] != '-')
552 				size = simple_strtoull(argv[3], NULL, 16);
553 			argc--;
554 		}
555 		/* Use maximum available size */
556 		if (!size) {
557 			size = (int64_t)ubi->avail_pebs * ubi->leb_size;
558 			printf("No size specified -> Using max size (%lld)\n", size);
559 		}
560 		/* E.g., create volume */
561 		if (argc == 3)
562 			return ubi_create_vol(argv[2], size, dynamic, id);
563 	}
564 
565 	if (strncmp(argv[1], "remove", 6) == 0) {
566 		/* E.g., remove volume */
567 		if (argc == 3)
568 			return ubi_remove_vol(argv[2]);
569 	}
570 
571 	if (strncmp(argv[1], "write", 5) == 0) {
572 		int ret;
573 
574 		if (argc < 5) {
575 			printf("Please see usage\n");
576 			return 1;
577 		}
578 
579 		addr = simple_strtoul(argv[2], NULL, 16);
580 		size = simple_strtoul(argv[4], NULL, 16);
581 
582 		if (strlen(argv[1]) == 10 &&
583 		    strncmp(argv[1] + 5, ".part", 5) == 0) {
584 			if (argc < 6) {
585 				ret = ubi_volume_continue_write(argv[3],
586 						(void *)addr, size);
587 			} else {
588 				size_t full_size;
589 				full_size = simple_strtoul(argv[5], NULL, 16);
590 				ret = ubi_volume_begin_write(argv[3],
591 						(void *)addr, size, full_size);
592 			}
593 		} else {
594 			ret = ubi_volume_write(argv[3], (void *)addr, size);
595 		}
596 		if (!ret) {
597 			printf("%lld bytes written to volume %s\n", size,
598 			       argv[3]);
599 		}
600 
601 		return ret;
602 	}
603 
604 	if (strncmp(argv[1], "read", 4) == 0) {
605 		size = 0;
606 
607 		/* E.g., read volume size */
608 		if (argc == 5) {
609 			size = simple_strtoul(argv[4], NULL, 16);
610 			argc--;
611 		}
612 
613 		/* E.g., read volume */
614 		if (argc == 4) {
615 			addr = simple_strtoul(argv[2], NULL, 16);
616 			argc--;
617 		}
618 
619 		if (argc == 3) {
620 			return ubi_volume_read(argv[3], (char *)addr, size);
621 		}
622 	}
623 
624 	printf("Please see usage\n");
625 	return 1;
626 }
627 
628 U_BOOT_CMD(
629 	ubi, 6, 1, do_ubi,
630 	"ubi commands",
631 	"detach"
632 		" - detach ubi from a mtd partition\n"
633 	"ubi part [part] [offset]\n"
634 		" - Show or set current partition (with optional VID"
635 		" header offset)\n"
636 	"ubi info [l[ayout]]"
637 		" - Display volume and ubi layout information\n"
638 	"ubi check volumename"
639 		" - check if volumename exists\n"
640 	"ubi create[vol] volume [size] [type] [id]\n"
641 		" - create volume name with size ('-' for maximum"
642 		" available size)\n"
643 	"ubi write[vol] address volume size"
644 		" - Write volume from address with size\n"
645 	"ubi write.part address volume size [fullsize]\n"
646 		" - Write part of a volume from address\n"
647 	"ubi read[vol] address volume [size]"
648 		" - Read volume to address with size\n"
649 	"ubi remove[vol] volume"
650 		" - Remove volume\n"
651 	"[Legends]\n"
652 	" volume: character name\n"
653 	" size: specified in bytes\n"
654 	" type: s[tatic] or d[ynamic] (default=dynamic)"
655 );
656