xref: /openbmc/u-boot/cmd/ubi.c (revision 78a88f79) 
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 <nand.h>
19 #include <onenand_uboot.h>
20 #include <linux/mtd/mtd.h>
21 #include <linux/mtd/partitions.h>
22 #include <linux/err.h>
23 #include <ubi_uboot.h>
24 #include <linux/errno.h>
25 #include <jffs2/load_kernel.h>
26 
27 #undef ubi_msg
28 #define ubi_msg(fmt, ...) printf("UBI: " fmt "\n", ##__VA_ARGS__)
29 
30 #define DEV_TYPE_NONE		0
31 #define DEV_TYPE_NAND		1
32 #define DEV_TYPE_ONENAND	2
33 #define DEV_TYPE_NOR		3
34 
35 /* Private own data */
36 static struct ubi_device *ubi;
37 static char buffer[80];
38 static int ubi_initialized;
39 
40 struct selected_dev {
41 	char part_name[80];
42 	int selected;
43 	int nr;
44 	struct mtd_info *mtd_info;
45 };
46 
47 static struct selected_dev ubi_dev;
48 
49 #ifdef CONFIG_CMD_UBIFS
50 int ubifs_is_mounted(void);
51 void cmd_ubifs_umount(void);
52 #endif
53 
54 static void display_volume_info(struct ubi_device *ubi)
55 {
56 	int i;
57 
58 	for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
59 		if (!ubi->volumes[i])
60 			continue;	/* Empty record */
61 		ubi_dump_vol_info(ubi->volumes[i]);
62 	}
63 }
64 
65 static void display_ubi_info(struct ubi_device *ubi)
66 {
67 	ubi_msg("MTD device name:            \"%s\"", ubi->mtd->name);
68 	ubi_msg("MTD device size:            %llu MiB", ubi->flash_size >> 20);
69 	ubi_msg("physical eraseblock size:   %d bytes (%d KiB)",
70 			ubi->peb_size, ubi->peb_size >> 10);
71 	ubi_msg("logical eraseblock size:    %d bytes", ubi->leb_size);
72 	ubi_msg("number of good PEBs:        %d", ubi->good_peb_count);
73 	ubi_msg("number of bad PEBs:         %d", ubi->bad_peb_count);
74 	ubi_msg("smallest flash I/O unit:    %d", ubi->min_io_size);
75 	ubi_msg("VID header offset:          %d (aligned %d)",
76 			ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
77 	ubi_msg("data offset:                %d", ubi->leb_start);
78 	ubi_msg("max. allowed volumes:       %d", ubi->vtbl_slots);
79 	ubi_msg("wear-leveling threshold:    %d", CONFIG_MTD_UBI_WL_THRESHOLD);
80 	ubi_msg("number of internal volumes: %d", UBI_INT_VOL_COUNT);
81 	ubi_msg("number of user volumes:     %d",
82 			ubi->vol_count - UBI_INT_VOL_COUNT);
83 	ubi_msg("available PEBs:             %d", ubi->avail_pebs);
84 	ubi_msg("total number of reserved PEBs: %d", ubi->rsvd_pebs);
85 	ubi_msg("number of PEBs reserved for bad PEB handling: %d",
86 			ubi->beb_rsvd_pebs);
87 	ubi_msg("max/mean erase counter: %d/%d", ubi->max_ec, ubi->mean_ec);
88 }
89 
90 static int ubi_info(int layout)
91 {
92 	if (layout)
93 		display_volume_info(ubi);
94 	else
95 		display_ubi_info(ubi);
96 
97 	return 0;
98 }
99 
100 static int ubi_check_volumename(const struct ubi_volume *vol, char *name)
101 {
102 	return strcmp(vol->name, name);
103 }
104 
105 static int ubi_check(char *name)
106 {
107 	int i;
108 
109 	for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
110 		if (!ubi->volumes[i])
111 			continue;	/* Empty record */
112 
113 		if (!ubi_check_volumename(ubi->volumes[i], name))
114 			return 0;
115 	}
116 
117 	return 1;
118 }
119 
120 
121 static int verify_mkvol_req(const struct ubi_device *ubi,
122 			    const struct ubi_mkvol_req *req)
123 {
124 	int n, err = EINVAL;
125 
126 	if (req->bytes < 0 || req->alignment < 0 || req->vol_type < 0 ||
127 	    req->name_len < 0)
128 		goto bad;
129 
130 	if ((req->vol_id < 0 || req->vol_id >= ubi->vtbl_slots) &&
131 	    req->vol_id != UBI_VOL_NUM_AUTO)
132 		goto bad;
133 
134 	if (req->alignment == 0)
135 		goto bad;
136 
137 	if (req->bytes == 0) {
138 		printf("No space left in UBI device!\n");
139 		err = ENOMEM;
140 		goto bad;
141 	}
142 
143 	if (req->vol_type != UBI_DYNAMIC_VOLUME &&
144 	    req->vol_type != UBI_STATIC_VOLUME)
145 		goto bad;
146 
147 	if (req->alignment > ubi->leb_size)
148 		goto bad;
149 
150 	n = req->alignment % ubi->min_io_size;
151 	if (req->alignment != 1 && n)
152 		goto bad;
153 
154 	if (req->name_len > UBI_VOL_NAME_MAX) {
155 		printf("Name too long!\n");
156 		err = ENAMETOOLONG;
157 		goto bad;
158 	}
159 
160 	return 0;
161 bad:
162 	return err;
163 }
164 
165 static int ubi_create_vol(char *volume, int64_t size, int dynamic, int vol_id)
166 {
167 	struct ubi_mkvol_req req;
168 	int err;
169 
170 	if (dynamic)
171 		req.vol_type = UBI_DYNAMIC_VOLUME;
172 	else
173 		req.vol_type = UBI_STATIC_VOLUME;
174 
175 	req.vol_id = vol_id;
176 	req.alignment = 1;
177 	req.bytes = size;
178 
179 	strcpy(req.name, volume);
180 	req.name_len = strlen(volume);
181 	req.name[req.name_len] = '\0';
182 	req.padding1 = 0;
183 	/* It's duplicated at drivers/mtd/ubi/cdev.c */
184 	err = verify_mkvol_req(ubi, &req);
185 	if (err) {
186 		printf("verify_mkvol_req failed %d\n", err);
187 		return err;
188 	}
189 	printf("Creating %s volume %s of size %lld\n",
190 		dynamic ? "dynamic" : "static", volume, size);
191 	/* Call real ubi create volume */
192 	return ubi_create_volume(ubi, &req);
193 }
194 
195 static struct ubi_volume *ubi_find_volume(char *volume)
196 {
197 	struct ubi_volume *vol = NULL;
198 	int i;
199 
200 	for (i = 0; i < ubi->vtbl_slots; i++) {
201 		vol = ubi->volumes[i];
202 		if (vol && !strcmp(vol->name, volume))
203 			return vol;
204 	}
205 
206 	printf("Volume %s not found!\n", volume);
207 	return NULL;
208 }
209 
210 static int ubi_remove_vol(char *volume)
211 {
212 	int err, reserved_pebs, i;
213 	struct ubi_volume *vol;
214 
215 	vol = ubi_find_volume(volume);
216 	if (vol == NULL)
217 		return ENODEV;
218 
219 	printf("Remove UBI volume %s (id %d)\n", vol->name, vol->vol_id);
220 
221 	if (ubi->ro_mode) {
222 		printf("It's read-only mode\n");
223 		err = EROFS;
224 		goto out_err;
225 	}
226 
227 	err = ubi_change_vtbl_record(ubi, vol->vol_id, NULL);
228 	if (err) {
229 		printf("Error changing Vol tabel record err=%x\n", err);
230 		goto out_err;
231 	}
232 	reserved_pebs = vol->reserved_pebs;
233 	for (i = 0; i < vol->reserved_pebs; i++) {
234 		err = ubi_eba_unmap_leb(ubi, vol, i);
235 		if (err)
236 			goto out_err;
237 	}
238 
239 	kfree(vol->eba_tbl);
240 	ubi->volumes[vol->vol_id]->eba_tbl = NULL;
241 	ubi->volumes[vol->vol_id] = NULL;
242 
243 	ubi->rsvd_pebs -= reserved_pebs;
244 	ubi->avail_pebs += reserved_pebs;
245 	i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
246 	if (i > 0) {
247 		i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
248 		ubi->avail_pebs -= i;
249 		ubi->rsvd_pebs += i;
250 		ubi->beb_rsvd_pebs += i;
251 		if (i > 0)
252 			ubi_msg("reserve more %d PEBs", i);
253 	}
254 	ubi->vol_count -= 1;
255 
256 	return 0;
257 out_err:
258 	ubi_err(ubi, "cannot remove volume %s, error %d", volume, err);
259 	if (err < 0)
260 		err = -err;
261 	return err;
262 }
263 
264 static int ubi_volume_continue_write(char *volume, void *buf, size_t size)
265 {
266 	int err = 1;
267 	struct ubi_volume *vol;
268 
269 	vol = ubi_find_volume(volume);
270 	if (vol == NULL)
271 		return ENODEV;
272 
273 	err = ubi_more_update_data(ubi, vol, buf, size);
274 	if (err < 0) {
275 		printf("Couldnt or partially wrote data\n");
276 		return -err;
277 	}
278 
279 	if (err) {
280 		size = err;
281 
282 		err = ubi_check_volume(ubi, vol->vol_id);
283 		if (err < 0)
284 			return -err;
285 
286 		if (err) {
287 			ubi_warn(ubi, "volume %d on UBI device %d is corrupt",
288 				 vol->vol_id, ubi->ubi_num);
289 			vol->corrupted = 1;
290 		}
291 
292 		vol->checked = 1;
293 		ubi_gluebi_updated(vol);
294 	}
295 
296 	return 0;
297 }
298 
299 int ubi_volume_begin_write(char *volume, void *buf, size_t size,
300 	size_t full_size)
301 {
302 	int err = 1;
303 	int rsvd_bytes = 0;
304 	struct ubi_volume *vol;
305 
306 	vol = ubi_find_volume(volume);
307 	if (vol == NULL)
308 		return ENODEV;
309 
310 	rsvd_bytes = vol->reserved_pebs * (ubi->leb_size - vol->data_pad);
311 	if (size > rsvd_bytes) {
312 		printf("size > volume size! Aborting!\n");
313 		return EINVAL;
314 	}
315 
316 	err = ubi_start_update(ubi, vol, full_size);
317 	if (err < 0) {
318 		printf("Cannot start volume update\n");
319 		return -err;
320 	}
321 
322 	return ubi_volume_continue_write(volume, buf, size);
323 }
324 
325 int ubi_volume_write(char *volume, void *buf, size_t size)
326 {
327 	return ubi_volume_begin_write(volume, buf, size, size);
328 }
329 
330 int ubi_volume_read(char *volume, char *buf, size_t size)
331 {
332 	int err, lnum, off, len, tbuf_size;
333 	void *tbuf;
334 	unsigned long long tmp;
335 	struct ubi_volume *vol;
336 	loff_t offp = 0;
337 	size_t len_read;
338 
339 	vol = ubi_find_volume(volume);
340 	if (vol == NULL)
341 		return ENODEV;
342 
343 	if (vol->updating) {
344 		printf("updating");
345 		return EBUSY;
346 	}
347 	if (vol->upd_marker) {
348 		printf("damaged volume, update marker is set");
349 		return EBADF;
350 	}
351 	if (offp == vol->used_bytes)
352 		return 0;
353 
354 	if (size == 0) {
355 		printf("No size specified -> Using max size (%lld)\n", vol->used_bytes);
356 		size = vol->used_bytes;
357 	}
358 
359 	printf("Read %u bytes from volume %s to %p\n", size, volume, buf);
360 
361 	if (vol->corrupted)
362 		printf("read from corrupted volume %d", vol->vol_id);
363 	if (offp + size > vol->used_bytes)
364 		size = vol->used_bytes - offp;
365 
366 	tbuf_size = vol->usable_leb_size;
367 	if (size < tbuf_size)
368 		tbuf_size = ALIGN(size, ubi->min_io_size);
369 	tbuf = malloc_cache_aligned(tbuf_size);
370 	if (!tbuf) {
371 		printf("NO MEM\n");
372 		return ENOMEM;
373 	}
374 	len = size > tbuf_size ? tbuf_size : size;
375 
376 	tmp = offp;
377 	off = do_div(tmp, vol->usable_leb_size);
378 	lnum = tmp;
379 	len_read = size;
380 	do {
381 		if (off + len >= vol->usable_leb_size)
382 			len = vol->usable_leb_size - off;
383 
384 		err = ubi_eba_read_leb(ubi, vol, lnum, tbuf, off, len, 0);
385 		if (err) {
386 			printf("read err %x\n", err);
387 			err = -err;
388 			break;
389 		}
390 		off += len;
391 		if (off == vol->usable_leb_size) {
392 			lnum += 1;
393 			off -= vol->usable_leb_size;
394 		}
395 
396 		size -= len;
397 		offp += len;
398 
399 		memcpy(buf, tbuf, len);
400 
401 		buf += len;
402 		len = size > tbuf_size ? tbuf_size : size;
403 	} while (size);
404 
405 	if (!size)
406 		env_set_hex("filesize", len_read);
407 
408 	free(tbuf);
409 	return err;
410 }
411 
412 static int ubi_dev_scan(struct mtd_info *info, char *ubidev,
413 		const char *vid_header_offset)
414 {
415 	struct mtd_device *dev;
416 	struct part_info *part;
417 	struct mtd_partition mtd_part;
418 	char ubi_mtd_param_buffer[80];
419 	u8 pnum;
420 	int err;
421 
422 	if (find_dev_and_part(ubidev, &dev, &pnum, &part) != 0)
423 		return 1;
424 
425 	sprintf(buffer, "mtd=%d", pnum);
426 	memset(&mtd_part, 0, sizeof(mtd_part));
427 	mtd_part.name = buffer;
428 	mtd_part.size = part->size;
429 	mtd_part.offset = part->offset;
430 	add_mtd_partitions(info, &mtd_part, 1);
431 
432 	strcpy(ubi_mtd_param_buffer, buffer);
433 	if (vid_header_offset)
434 		sprintf(ubi_mtd_param_buffer, "mtd=%d,%s", pnum,
435 				vid_header_offset);
436 	err = ubi_mtd_param_parse(ubi_mtd_param_buffer, NULL);
437 	if (err) {
438 		del_mtd_partitions(info);
439 		return -err;
440 	}
441 
442 	err = ubi_init();
443 	if (err) {
444 		del_mtd_partitions(info);
445 		return -err;
446 	}
447 
448 	ubi_initialized = 1;
449 
450 	return 0;
451 }
452 
453 int ubi_detach(void)
454 {
455 	if (mtdparts_init() != 0) {
456 		printf("Error initializing mtdparts!\n");
457 		return 1;
458 	}
459 
460 #ifdef CONFIG_CMD_UBIFS
461 	/*
462 	 * Automatically unmount UBIFS partition when user
463 	 * changes the UBI device. Otherwise the following
464 	 * UBIFS commands will crash.
465 	 */
466 	if (ubifs_is_mounted())
467 		cmd_ubifs_umount();
468 #endif
469 
470 	/*
471 	 * Call ubi_exit() before re-initializing the UBI subsystem
472 	 */
473 	if (ubi_initialized) {
474 		ubi_exit();
475 		del_mtd_partitions(ubi_dev.mtd_info);
476 		ubi_initialized = 0;
477 	}
478 
479 	ubi_dev.selected = 0;
480 	return 0;
481 }
482 
483 int ubi_part(char *part_name, const char *vid_header_offset)
484 {
485 	int err = 0;
486 	char mtd_dev[16];
487 	struct mtd_device *dev;
488 	struct part_info *part;
489 	u8 pnum;
490 
491 	ubi_detach();
492 	/*
493 	 * Search the mtd device number where this partition
494 	 * is located
495 	 */
496 	if (find_dev_and_part(part_name, &dev, &pnum, &part)) {
497 		printf("Partition %s not found!\n", part_name);
498 		return 1;
499 	}
500 	sprintf(mtd_dev, "%s%d", MTD_DEV_TYPE(dev->id->type), dev->id->num);
501 	ubi_dev.mtd_info = get_mtd_device_nm(mtd_dev);
502 	if (IS_ERR(ubi_dev.mtd_info)) {
503 		printf("Partition %s not found on device %s!\n", part_name,
504 		       mtd_dev);
505 		return 1;
506 	}
507 
508 	ubi_dev.selected = 1;
509 
510 	strcpy(ubi_dev.part_name, part_name);
511 	err = ubi_dev_scan(ubi_dev.mtd_info, ubi_dev.part_name,
512 			vid_header_offset);
513 	if (err) {
514 		printf("UBI init error %d\n", err);
515 		printf("Please check, if the correct MTD partition is used (size big enough?)\n");
516 		ubi_dev.selected = 0;
517 		return err;
518 	}
519 
520 	ubi = ubi_devices[0];
521 
522 	return 0;
523 }
524 
525 static int do_ubi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
526 {
527 	int64_t size = 0;
528 	ulong addr = 0;
529 
530 	if (argc < 2)
531 		return CMD_RET_USAGE;
532 
533 
534 	if (strcmp(argv[1], "detach") == 0) {
535 		if (argc < 2)
536 			return CMD_RET_USAGE;
537 
538 		return ubi_detach();
539 	}
540 
541 
542 	if (strcmp(argv[1], "part") == 0) {
543 		const char *vid_header_offset = NULL;
544 
545 		/* Print current partition */
546 		if (argc == 2) {
547 			if (!ubi_dev.selected) {
548 				printf("Error, no UBI device/partition selected!\n");
549 				return 1;
550 			}
551 
552 			printf("Device %d: %s, partition %s\n",
553 			       ubi_dev.nr, ubi_dev.mtd_info->name, ubi_dev.part_name);
554 			return 0;
555 		}
556 
557 		if (argc < 3)
558 			return CMD_RET_USAGE;
559 
560 		if (argc > 3)
561 			vid_header_offset = argv[3];
562 
563 		return ubi_part(argv[2], vid_header_offset);
564 	}
565 
566 	if ((strcmp(argv[1], "part") != 0) && (!ubi_dev.selected)) {
567 		printf("Error, no UBI device/partition selected!\n");
568 		return 1;
569 	}
570 
571 	if (strcmp(argv[1], "info") == 0) {
572 		int layout = 0;
573 		if (argc > 2 && !strncmp(argv[2], "l", 1))
574 			layout = 1;
575 		return ubi_info(layout);
576 	}
577 
578 	if (strcmp(argv[1], "check") == 0) {
579 		if (argc > 2)
580 			return ubi_check(argv[2]);
581 
582 		printf("Error, no volume name passed\n");
583 		return 1;
584 	}
585 
586 	if (strncmp(argv[1], "create", 6) == 0) {
587 		int dynamic = 1;	/* default: dynamic volume */
588 		int id = UBI_VOL_NUM_AUTO;
589 
590 		/* Use maximum available size */
591 		size = 0;
592 
593 		/* E.g., create volume size type vol_id */
594 		if (argc == 6) {
595 			id = simple_strtoull(argv[5], NULL, 16);
596 			argc--;
597 		}
598 
599 		/* E.g., create volume size type */
600 		if (argc == 5) {
601 			if (strncmp(argv[4], "s", 1) == 0)
602 				dynamic = 0;
603 			else if (strncmp(argv[4], "d", 1) != 0) {
604 				printf("Incorrect type\n");
605 				return 1;
606 			}
607 			argc--;
608 		}
609 		/* E.g., create volume size */
610 		if (argc == 4) {
611 			if (argv[3][0] != '-')
612 				size = simple_strtoull(argv[3], NULL, 16);
613 			argc--;
614 		}
615 		/* Use maximum available size */
616 		if (!size) {
617 			size = (int64_t)ubi->avail_pebs * ubi->leb_size;
618 			printf("No size specified -> Using max size (%lld)\n", size);
619 		}
620 		/* E.g., create volume */
621 		if (argc == 3)
622 			return ubi_create_vol(argv[2], size, dynamic, id);
623 	}
624 
625 	if (strncmp(argv[1], "remove", 6) == 0) {
626 		/* E.g., remove volume */
627 		if (argc == 3)
628 			return ubi_remove_vol(argv[2]);
629 	}
630 
631 	if (strncmp(argv[1], "write", 5) == 0) {
632 		int ret;
633 
634 		if (argc < 5) {
635 			printf("Please see usage\n");
636 			return 1;
637 		}
638 
639 		addr = simple_strtoul(argv[2], NULL, 16);
640 		size = simple_strtoul(argv[4], NULL, 16);
641 
642 		if (strlen(argv[1]) == 10 &&
643 		    strncmp(argv[1] + 5, ".part", 5) == 0) {
644 			if (argc < 6) {
645 				ret = ubi_volume_continue_write(argv[3],
646 						(void *)addr, size);
647 			} else {
648 				size_t full_size;
649 				full_size = simple_strtoul(argv[5], NULL, 16);
650 				ret = ubi_volume_begin_write(argv[3],
651 						(void *)addr, size, full_size);
652 			}
653 		} else {
654 			ret = ubi_volume_write(argv[3], (void *)addr, size);
655 		}
656 		if (!ret) {
657 			printf("%lld bytes written to volume %s\n", size,
658 			       argv[3]);
659 		}
660 
661 		return ret;
662 	}
663 
664 	if (strncmp(argv[1], "read", 4) == 0) {
665 		size = 0;
666 
667 		/* E.g., read volume size */
668 		if (argc == 5) {
669 			size = simple_strtoul(argv[4], NULL, 16);
670 			argc--;
671 		}
672 
673 		/* E.g., read volume */
674 		if (argc == 4) {
675 			addr = simple_strtoul(argv[2], NULL, 16);
676 			argc--;
677 		}
678 
679 		if (argc == 3) {
680 			return ubi_volume_read(argv[3], (char *)addr, size);
681 		}
682 	}
683 
684 	printf("Please see usage\n");
685 	return 1;
686 }
687 
688 U_BOOT_CMD(
689 	ubi, 6, 1, do_ubi,
690 	"ubi commands",
691 	"detach"
692 		" - detach ubi from a mtd partition\n"
693 	"ubi part [part] [offset]\n"
694 		" - Show or set current partition (with optional VID"
695 		" header offset)\n"
696 	"ubi info [l[ayout]]"
697 		" - Display volume and ubi layout information\n"
698 	"ubi check volumename"
699 		" - check if volumename exists\n"
700 	"ubi create[vol] volume [size] [type] [id]\n"
701 		" - create volume name with size ('-' for maximum"
702 		" available size)\n"
703 	"ubi write[vol] address volume size"
704 		" - Write volume from address with size\n"
705 	"ubi write.part address volume size [fullsize]\n"
706 		" - Write part of a volume from address\n"
707 	"ubi read[vol] address volume [size]"
708 		" - Read volume to address with size\n"
709 	"ubi remove[vol] volume"
710 		" - Remove volume\n"
711 	"[Legends]\n"
712 	" volume: character name\n"
713 	" size: specified in bytes\n"
714 	" type: s[tatic] or d[ynamic] (default=dynamic)"
715 );
716