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11#ifndef __UBOOT__
12#include <linux/module.h>
13#include <linux/types.h>
14#include <linux/kernel.h>
15#include <linux/slab.h>
16#include <linux/list.h>
17#include <linux/kmod.h>
18#endif
19
20#include <common.h>
21#include <malloc.h>
22#include <linux/errno.h>
23#include <linux/compat.h>
24#include <ubi_uboot.h>
25
26#include <linux/mtd/mtd.h>
27#include <linux/mtd/partitions.h>
28#include <linux/err.h>
29#include <linux/sizes.h>
30
31#include "mtdcore.h"
32
33#ifndef __UBOOT__
34static DEFINE_MUTEX(mtd_partitions_mutex);
35#else
36DEFINE_MUTEX(mtd_partitions_mutex);
37#endif
38
39#ifdef __UBOOT__
40
41
42
43
44
45
46
47char *kstrdup(const char *s, gfp_t gfp)
48{
49 size_t len;
50 char *buf;
51
52 if (!s)
53 return NULL;
54
55 len = strlen(s) + 1;
56 buf = kmalloc(len, gfp);
57 if (buf)
58 memcpy(buf, s, len);
59 return buf;
60}
61#endif
62
63#define MTD_SIZE_REMAINING (~0LLU)
64#define MTD_OFFSET_NOT_SPECIFIED (~0LLU)
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79static int mtd_parse_partition(const char **_mtdparts,
80 struct mtd_partition *partition)
81{
82 const char *mtdparts = *_mtdparts;
83 const char *name = NULL;
84 int name_len;
85 char *buf;
86
87
88 memset(partition, 0, sizeof(struct mtd_partition));
89
90
91 if (*mtdparts == '-') {
92
93 partition->size = MTD_SIZE_REMAINING;
94 mtdparts++;
95 } else {
96 partition->size = ustrtoull(mtdparts, (char **)&mtdparts, 0);
97 if (partition->size < SZ_4K) {
98 printf("Minimum partition size 4kiB, %lldB requested\n",
99 partition->size);
100 return -EINVAL;
101 }
102 }
103
104
105 partition->offset = MTD_OFFSET_NOT_SPECIFIED;
106 if (*mtdparts == '@') {
107 mtdparts++;
108 partition->offset = ustrtoull(mtdparts, (char **)&mtdparts, 0);
109 }
110
111
112 if (*mtdparts == '(') {
113 name = ++mtdparts;
114 mtdparts = strchr(name, ')');
115 if (!mtdparts) {
116 printf("No closing ')' found in partition name\n");
117 return -EINVAL;
118 }
119 name_len = mtdparts - name + 1;
120 if ((name_len - 1) == 0) {
121 printf("Empty partition name\n");
122 return -EINVAL;
123 }
124 mtdparts++;
125 } else {
126
127 name_len = 22;
128 }
129
130
131 if (strncmp(mtdparts, "ro", 2) == 0) {
132 partition->mask_flags |= MTD_WRITEABLE;
133 mtdparts += 2;
134 }
135
136
137 if (*mtdparts == ',') {
138 if (partition->size == MTD_SIZE_REMAINING) {
139 printf("No partitions allowed after a fill-up\n");
140 return -EINVAL;
141 }
142 ++mtdparts;
143 } else if ((*mtdparts == ';') || (*mtdparts == '\0')) {
144
145 } else {
146 printf("Unexpected character '%c' in mtdparts\n", *mtdparts);
147 return -EINVAL;
148 }
149
150
151
152
153
154 buf = malloc(name_len);
155 if (!buf)
156 return -ENOMEM;
157
158 if (name)
159 strncpy(buf, name, name_len - 1);
160 else
161 snprintf(buf, name_len, "0x%08llx@0x%08llx",
162 partition->size, partition->offset);
163
164 buf[name_len - 1] = '\0';
165 partition->name = buf;
166
167 *_mtdparts = mtdparts;
168
169 return 0;
170}
171
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189
190int mtd_parse_partitions(struct mtd_info *parent, const char **_mtdparts,
191 struct mtd_partition **_parts, int *_nparts)
192{
193 struct mtd_partition partition = {}, *parts;
194 const char *mtdparts = *_mtdparts;
195 int cur_off = 0, cur_sz = 0;
196 int nparts = 0;
197 int ret, idx;
198 u64 sz;
199
200
201 while (mtdparts[0] != '\0' && mtdparts[0] != ';') {
202 ret = mtd_parse_partition(&mtdparts, &partition);
203 if (ret)
204 return ret;
205
206 free((char *)partition.name);
207 nparts++;
208 }
209
210
211 parts = malloc(sizeof(*parts) * nparts);
212 if (!parts) {
213 printf("Not enough space to save partitions meta-data\n");
214 return -ENOMEM;
215 }
216
217
218 for (idx = 0; idx < nparts; idx++) {
219 ret = mtd_parse_partition(_mtdparts, &parts[idx]);
220 if (ret)
221 return ret;
222
223 if (parts[idx].size == MTD_SIZE_REMAINING)
224 parts[idx].size = parent->size - cur_sz;
225 cur_sz += parts[idx].size;
226
227 sz = parts[idx].size;
228 if (sz < parent->writesize || do_div(sz, parent->writesize)) {
229 printf("Partition size must be a multiple of %d\n",
230 parent->writesize);
231 return -EINVAL;
232 }
233
234 if (parts[idx].offset == MTD_OFFSET_NOT_SPECIFIED)
235 parts[idx].offset = cur_off;
236 cur_off += parts[idx].size;
237
238 parts[idx].ecclayout = parent->ecclayout;
239 }
240
241
242 if (*_mtdparts[0] == ';')
243 (*_mtdparts)++;
244
245 *_parts = parts;
246 *_nparts = nparts;
247
248 return 0;
249}
250
251
252
253
254
255
256
257
258
259
260
261void mtd_free_parsed_partitions(struct mtd_partition *parts,
262 unsigned int nparts)
263{
264 int i;
265
266 for (i = 0; i < nparts; i++)
267 free((char *)parts[i].name);
268
269 free(parts);
270}
271
272
273
274
275
276
277static int part_read(struct mtd_info *mtd, loff_t from, size_t len,
278 size_t *retlen, u_char *buf)
279{
280 struct mtd_ecc_stats stats;
281 int res;
282
283 stats = mtd->parent->ecc_stats;
284 res = mtd->parent->_read(mtd->parent, from + mtd->offset, len,
285 retlen, buf);
286 if (unlikely(mtd_is_eccerr(res)))
287 mtd->ecc_stats.failed +=
288 mtd->parent->ecc_stats.failed - stats.failed;
289 else
290 mtd->ecc_stats.corrected +=
291 mtd->parent->ecc_stats.corrected - stats.corrected;
292 return res;
293}
294
295#ifndef __UBOOT__
296static int part_point(struct mtd_info *mtd, loff_t from, size_t len,
297 size_t *retlen, void **virt, resource_size_t *phys)
298{
299 return mtd->parent->_point(mtd->parent, from + mtd->offset, len,
300 retlen, virt, phys);
301}
302
303static int part_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
304{
305 return mtd->parent->_unpoint(mtd->parent, from + mtd->offset, len);
306}
307#endif
308
309static unsigned long part_get_unmapped_area(struct mtd_info *mtd,
310 unsigned long len,
311 unsigned long offset,
312 unsigned long flags)
313{
314 offset += mtd->offset;
315 return mtd->parent->_get_unmapped_area(mtd->parent, len, offset, flags);
316}
317
318static int part_read_oob(struct mtd_info *mtd, loff_t from,
319 struct mtd_oob_ops *ops)
320{
321 int res;
322
323 if (from >= mtd->size)
324 return -EINVAL;
325 if (ops->datbuf && from + ops->len > mtd->size)
326 return -EINVAL;
327
328
329
330
331
332 if (ops->oobbuf) {
333 size_t len, pages;
334
335 if (ops->mode == MTD_OPS_AUTO_OOB)
336 len = mtd->oobavail;
337 else
338 len = mtd->oobsize;
339 pages = mtd_div_by_ws(mtd->size, mtd);
340 pages -= mtd_div_by_ws(from, mtd);
341 if (ops->ooboffs + ops->ooblen > pages * len)
342 return -EINVAL;
343 }
344
345 res = mtd->parent->_read_oob(mtd->parent, from + mtd->offset, ops);
346 if (unlikely(res)) {
347 if (mtd_is_bitflip(res))
348 mtd->ecc_stats.corrected++;
349 if (mtd_is_eccerr(res))
350 mtd->ecc_stats.failed++;
351 }
352 return res;
353}
354
355static int part_read_user_prot_reg(struct mtd_info *mtd, loff_t from,
356 size_t len, size_t *retlen, u_char *buf)
357{
358 return mtd->parent->_read_user_prot_reg(mtd->parent, from, len,
359 retlen, buf);
360}
361
362static int part_get_user_prot_info(struct mtd_info *mtd, size_t len,
363 size_t *retlen, struct otp_info *buf)
364{
365 return mtd->parent->_get_user_prot_info(mtd->parent, len, retlen,
366 buf);
367}
368
369static int part_read_fact_prot_reg(struct mtd_info *mtd, loff_t from,
370 size_t len, size_t *retlen, u_char *buf)
371{
372 return mtd->parent->_read_fact_prot_reg(mtd->parent, from, len,
373 retlen, buf);
374}
375
376static int part_get_fact_prot_info(struct mtd_info *mtd, size_t len,
377 size_t *retlen, struct otp_info *buf)
378{
379 return mtd->parent->_get_fact_prot_info(mtd->parent, len, retlen,
380 buf);
381}
382
383static int part_write(struct mtd_info *mtd, loff_t to, size_t len,
384 size_t *retlen, const u_char *buf)
385{
386 return mtd->parent->_write(mtd->parent, to + mtd->offset, len,
387 retlen, buf);
388}
389
390static int part_panic_write(struct mtd_info *mtd, loff_t to, size_t len,
391 size_t *retlen, const u_char *buf)
392{
393 return mtd->parent->_panic_write(mtd->parent, to + mtd->offset, len,
394 retlen, buf);
395}
396
397static int part_write_oob(struct mtd_info *mtd, loff_t to,
398 struct mtd_oob_ops *ops)
399{
400 if (to >= mtd->size)
401 return -EINVAL;
402 if (ops->datbuf && to + ops->len > mtd->size)
403 return -EINVAL;
404 return mtd->parent->_write_oob(mtd->parent, to + mtd->offset, ops);
405}
406
407static int part_write_user_prot_reg(struct mtd_info *mtd, loff_t from,
408 size_t len, size_t *retlen, u_char *buf)
409{
410 return mtd->parent->_write_user_prot_reg(mtd->parent, from, len,
411 retlen, buf);
412}
413
414static int part_lock_user_prot_reg(struct mtd_info *mtd, loff_t from,
415 size_t len)
416{
417 return mtd->parent->_lock_user_prot_reg(mtd->parent, from, len);
418}
419
420#ifndef __UBOOT__
421static int part_writev(struct mtd_info *mtd, const struct kvec *vecs,
422 unsigned long count, loff_t to, size_t *retlen)
423{
424 return mtd->parent->_writev(mtd->parent, vecs, count,
425 to + mtd->offset, retlen);
426}
427#endif
428
429static int part_erase(struct mtd_info *mtd, struct erase_info *instr)
430{
431 int ret;
432
433 instr->addr += mtd->offset;
434 ret = mtd->parent->_erase(mtd->parent, instr);
435 if (ret) {
436 if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
437 instr->fail_addr -= mtd->offset;
438 instr->addr -= mtd->offset;
439 }
440 return ret;
441}
442
443void mtd_erase_callback(struct erase_info *instr)
444{
445 if (instr->mtd->_erase == part_erase) {
446 if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
447 instr->fail_addr -= instr->mtd->offset;
448 instr->addr -= instr->mtd->offset;
449 }
450 if (instr->callback)
451 instr->callback(instr);
452}
453EXPORT_SYMBOL_GPL(mtd_erase_callback);
454
455static int part_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
456{
457 return mtd->parent->_lock(mtd->parent, ofs + mtd->offset, len);
458}
459
460static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
461{
462 return mtd->parent->_unlock(mtd->parent, ofs + mtd->offset, len);
463}
464
465static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
466{
467 return mtd->parent->_is_locked(mtd->parent, ofs + mtd->offset, len);
468}
469
470static void part_sync(struct mtd_info *mtd)
471{
472 mtd->parent->_sync(mtd->parent);
473}
474
475#ifndef __UBOOT__
476static int part_suspend(struct mtd_info *mtd)
477{
478 return mtd->parent->_suspend(mtd->parent);
479}
480
481static void part_resume(struct mtd_info *mtd)
482{
483 mtd->parent->_resume(mtd->parent);
484}
485#endif
486
487static int part_block_isreserved(struct mtd_info *mtd, loff_t ofs)
488{
489 ofs += mtd->offset;
490 return mtd->parent->_block_isreserved(mtd->parent, ofs);
491}
492
493static int part_block_isbad(struct mtd_info *mtd, loff_t ofs)
494{
495 ofs += mtd->offset;
496 return mtd->parent->_block_isbad(mtd->parent, ofs);
497}
498
499static int part_block_markbad(struct mtd_info *mtd, loff_t ofs)
500{
501 int res;
502
503 ofs += mtd->offset;
504 res = mtd->parent->_block_markbad(mtd->parent, ofs);
505 if (!res)
506 mtd->ecc_stats.badblocks++;
507 return res;
508}
509
510static inline void free_partition(struct mtd_info *p)
511{
512 kfree(p->name);
513 kfree(p);
514}
515
516
517
518
519
520static int do_del_mtd_partitions(struct mtd_info *master)
521{
522 struct mtd_info *slave, *next;
523 int ret, err = 0;
524
525 list_for_each_entry_safe(slave, next, &master->partitions, node) {
526 if (mtd_has_partitions(slave))
527 del_mtd_partitions(slave);
528
529 debug("Deleting %s MTD partition\n", slave->name);
530 ret = del_mtd_device(slave);
531 if (ret < 0) {
532 printf("Error when deleting partition \"%s\" (%d)\n",
533 slave->name, ret);
534 err = ret;
535 continue;
536 }
537
538 list_del(&slave->node);
539 free_partition(slave);
540 }
541
542 return err;
543}
544
545int del_mtd_partitions(struct mtd_info *master)
546{
547 int ret;
548
549 debug("Deleting MTD partitions on \"%s\":\n", master->name);
550
551 mutex_lock(&mtd_partitions_mutex);
552 ret = do_del_mtd_partitions(master);
553 mutex_unlock(&mtd_partitions_mutex);
554
555 return ret;
556}
557
558static struct mtd_info *allocate_partition(struct mtd_info *master,
559 const struct mtd_partition *part,
560 int partno, uint64_t cur_offset)
561{
562 struct mtd_info *slave;
563 char *name;
564
565
566 slave = kzalloc(sizeof(*slave), GFP_KERNEL);
567 name = kstrdup(part->name, GFP_KERNEL);
568 if (!name || !slave) {
569 printk(KERN_ERR"memory allocation error while creating partitions for \"%s\"\n",
570 master->name);
571 kfree(name);
572 kfree(slave);
573 return ERR_PTR(-ENOMEM);
574 }
575
576
577 slave->type = master->type;
578 slave->flags = master->flags & ~part->mask_flags;
579 slave->size = part->size;
580 slave->writesize = master->writesize;
581 slave->writebufsize = master->writebufsize;
582 slave->oobsize = master->oobsize;
583 slave->oobavail = master->oobavail;
584 slave->subpage_sft = master->subpage_sft;
585
586 slave->name = name;
587 slave->owner = master->owner;
588#ifndef __UBOOT__
589 slave->backing_dev_info = master->backing_dev_info;
590
591
592
593
594 slave->dev.parent = master->dev.parent;
595#endif
596
597 if (master->_read)
598 slave->_read = part_read;
599 if (master->_write)
600 slave->_write = part_write;
601
602 if (master->_panic_write)
603 slave->_panic_write = part_panic_write;
604
605#ifndef __UBOOT__
606 if (master->_point && master->_unpoint) {
607 slave->_point = part_point;
608 slave->_unpoint = part_unpoint;
609 }
610#endif
611
612 if (master->_get_unmapped_area)
613 slave->_get_unmapped_area = part_get_unmapped_area;
614 if (master->_read_oob)
615 slave->_read_oob = part_read_oob;
616 if (master->_write_oob)
617 slave->_write_oob = part_write_oob;
618 if (master->_read_user_prot_reg)
619 slave->_read_user_prot_reg = part_read_user_prot_reg;
620 if (master->_read_fact_prot_reg)
621 slave->_read_fact_prot_reg = part_read_fact_prot_reg;
622 if (master->_write_user_prot_reg)
623 slave->_write_user_prot_reg = part_write_user_prot_reg;
624 if (master->_lock_user_prot_reg)
625 slave->_lock_user_prot_reg = part_lock_user_prot_reg;
626 if (master->_get_user_prot_info)
627 slave->_get_user_prot_info = part_get_user_prot_info;
628 if (master->_get_fact_prot_info)
629 slave->_get_fact_prot_info = part_get_fact_prot_info;
630 if (master->_sync)
631 slave->_sync = part_sync;
632#ifndef __UBOOT__
633 if (!partno && !master->dev.class && master->_suspend &&
634 master->_resume) {
635 slave->_suspend = part_suspend;
636 slave->_resume = part_resume;
637 }
638 if (master->_writev)
639 slave->_writev = part_writev;
640#endif
641 if (master->_lock)
642 slave->_lock = part_lock;
643 if (master->_unlock)
644 slave->_unlock = part_unlock;
645 if (master->_is_locked)
646 slave->_is_locked = part_is_locked;
647 if (master->_block_isreserved)
648 slave->_block_isreserved = part_block_isreserved;
649 if (master->_block_isbad)
650 slave->_block_isbad = part_block_isbad;
651 if (master->_block_markbad)
652 slave->_block_markbad = part_block_markbad;
653 slave->_erase = part_erase;
654 slave->parent = master;
655 slave->offset = part->offset;
656 INIT_LIST_HEAD(&slave->partitions);
657 INIT_LIST_HEAD(&slave->node);
658
659 if (slave->offset == MTDPART_OFS_APPEND)
660 slave->offset = cur_offset;
661 if (slave->offset == MTDPART_OFS_NXTBLK) {
662 slave->offset = cur_offset;
663 if (mtd_mod_by_eb(cur_offset, master) != 0) {
664
665 slave->offset = (mtd_div_by_eb(cur_offset, master) + 1) * master->erasesize;
666 debug("Moving partition %d: "
667 "0x%012llx -> 0x%012llx\n", partno,
668 (unsigned long long)cur_offset, (unsigned long long)slave->offset);
669 }
670 }
671 if (slave->offset == MTDPART_OFS_RETAIN) {
672 slave->offset = cur_offset;
673 if (master->size - slave->offset >= slave->size) {
674 slave->size = master->size - slave->offset
675 - slave->size;
676 } else {
677 debug("mtd partition \"%s\" doesn't have enough space: %#llx < %#llx, disabled\n",
678 part->name, master->size - slave->offset,
679 slave->size);
680
681 goto out_register;
682 }
683 }
684 if (slave->size == MTDPART_SIZ_FULL)
685 slave->size = master->size - slave->offset;
686
687 debug("0x%012llx-0x%012llx : \"%s\"\n", (unsigned long long)slave->offset,
688 (unsigned long long)(slave->offset + slave->size), slave->name);
689
690
691 if (slave->offset >= master->size) {
692
693 slave->offset = 0;
694 slave->size = 0;
695 printk(KERN_ERR"mtd: partition \"%s\" is out of reach -- disabled\n",
696 part->name);
697 goto out_register;
698 }
699 if (slave->offset + slave->size > master->size) {
700 slave->size = master->size - slave->offset;
701 printk(KERN_WARNING"mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#llx\n",
702 part->name, master->name, slave->size);
703 }
704 if (master->numeraseregions > 1) {
705
706 int i, max = master->numeraseregions;
707 u64 end = slave->offset + slave->size;
708 struct mtd_erase_region_info *regions = master->eraseregions;
709
710
711
712 for (i = 0; i < max && regions[i].offset <= slave->offset; i++)
713 ;
714
715 if (i > 0)
716 i--;
717
718
719 for (; i < max && regions[i].offset < end; i++) {
720 if (slave->erasesize < regions[i].erasesize)
721 slave->erasesize = regions[i].erasesize;
722 }
723 WARN_ON(slave->erasesize == 0);
724 } else {
725
726 slave->erasesize = master->erasesize;
727 }
728
729 if ((slave->flags & MTD_WRITEABLE) &&
730 mtd_mod_by_eb(slave->offset, slave)) {
731
732
733
734 slave->flags &= ~MTD_WRITEABLE;
735 printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
736 part->name);
737 }
738 if ((slave->flags & MTD_WRITEABLE) &&
739 mtd_mod_by_eb(slave->size, slave)) {
740 slave->flags &= ~MTD_WRITEABLE;
741 printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
742 part->name);
743 }
744
745 slave->ecclayout = master->ecclayout;
746 slave->ecc_step_size = master->ecc_step_size;
747 slave->ecc_strength = master->ecc_strength;
748 slave->bitflip_threshold = master->bitflip_threshold;
749
750 if (master->_block_isbad) {
751 uint64_t offs = 0;
752
753 while (offs < slave->size) {
754 if (mtd_block_isbad(master, offs + slave->offset))
755 slave->ecc_stats.badblocks++;
756 offs += slave->erasesize;
757 }
758 }
759
760out_register:
761 return slave;
762}
763
764#ifndef __UBOOT__
765int mtd_add_partition(struct mtd_info *master, const char *name,
766 long long offset, long long length)
767{
768 struct mtd_partition part;
769 struct mtd_info *p, *new;
770 uint64_t start, end;
771 int ret = 0;
772
773
774 if (offset == MTDPART_OFS_APPEND ||
775 offset == MTDPART_OFS_NXTBLK)
776 return -EINVAL;
777
778 if (length == MTDPART_SIZ_FULL)
779 length = master->size - offset;
780
781 if (length <= 0)
782 return -EINVAL;
783
784 part.name = name;
785 part.size = length;
786 part.offset = offset;
787 part.mask_flags = 0;
788 part.ecclayout = NULL;
789
790 new = allocate_partition(master, &part, -1, offset);
791 if (IS_ERR(new))
792 return PTR_ERR(new);
793
794 start = offset;
795 end = offset + length;
796
797 mutex_lock(&mtd_partitions_mutex);
798 list_for_each_entry(p, &master->partitions, node) {
799 if (start >= p->offset &&
800 (start < (p->offset + p->size)))
801 goto err_inv;
802
803 if (end >= p->offset &&
804 (end < (p->offset + p->size)))
805 goto err_inv;
806 }
807
808 list_add_tail(&new->node, &master->partitions);
809 mutex_unlock(&mtd_partitions_mutex);
810
811 add_mtd_device(new);
812
813 return ret;
814err_inv:
815 mutex_unlock(&mtd_partitions_mutex);
816 free_partition(new);
817 return -EINVAL;
818}
819EXPORT_SYMBOL_GPL(mtd_add_partition);
820
821int mtd_del_partition(struct mtd_info *master, int partno)
822{
823 struct mtd_info *slave, *next;
824 int ret = -EINVAL;
825
826 mutex_lock(&mtd_partitions_mutex);
827 list_for_each_entry_safe(slave, next, &master->partitions, node)
828 if (slave->index == partno) {
829 ret = del_mtd_device(slave);
830 if (ret < 0)
831 break;
832
833 list_del(&slave->node);
834 free_partition(slave);
835 break;
836 }
837 mutex_unlock(&mtd_partitions_mutex);
838
839 return ret;
840}
841EXPORT_SYMBOL_GPL(mtd_del_partition);
842#endif
843
844
845
846
847
848
849
850
851
852
853int add_mtd_partitions(struct mtd_info *master,
854 const struct mtd_partition *parts,
855 int nbparts)
856{
857 struct mtd_info *slave;
858 uint64_t cur_offset = 0;
859 int i;
860
861 debug("Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
862
863 for (i = 0; i < nbparts; i++) {
864 slave = allocate_partition(master, parts + i, i, cur_offset);
865 if (IS_ERR(slave))
866 return PTR_ERR(slave);
867
868 mutex_lock(&mtd_partitions_mutex);
869 list_add_tail(&slave->node, &master->partitions);
870 mutex_unlock(&mtd_partitions_mutex);
871
872 add_mtd_device(slave);
873
874 cur_offset = slave->offset + slave->size;
875 }
876
877 return 0;
878}
879
880#ifndef __UBOOT__
881static DEFINE_SPINLOCK(part_parser_lock);
882static LIST_HEAD(part_parsers);
883
884static struct mtd_part_parser *get_partition_parser(const char *name)
885{
886 struct mtd_part_parser *p, *ret = NULL;
887
888 spin_lock(&part_parser_lock);
889
890 list_for_each_entry(p, &part_parsers, list)
891 if (!strcmp(p->name, name) && try_module_get(p->owner)) {
892 ret = p;
893 break;
894 }
895
896 spin_unlock(&part_parser_lock);
897
898 return ret;
899}
900
901#define put_partition_parser(p) do { module_put((p)->owner); } while (0)
902
903void register_mtd_parser(struct mtd_part_parser *p)
904{
905 spin_lock(&part_parser_lock);
906 list_add(&p->list, &part_parsers);
907 spin_unlock(&part_parser_lock);
908}
909EXPORT_SYMBOL_GPL(register_mtd_parser);
910
911void deregister_mtd_parser(struct mtd_part_parser *p)
912{
913 spin_lock(&part_parser_lock);
914 list_del(&p->list);
915 spin_unlock(&part_parser_lock);
916}
917EXPORT_SYMBOL_GPL(deregister_mtd_parser);
918
919
920
921
922
923static const char * const default_mtd_part_types[] = {
924 "cmdlinepart",
925 "ofpart",
926 NULL
927};
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949int parse_mtd_partitions(struct mtd_info *master, const char *const *types,
950 struct mtd_partition **pparts,
951 struct mtd_part_parser_data *data)
952{
953 struct mtd_part_parser *parser;
954 int ret = 0;
955
956 if (!types)
957 types = default_mtd_part_types;
958
959 for ( ; ret <= 0 && *types; types++) {
960 parser = get_partition_parser(*types);
961 if (!parser && !request_module("%s", *types))
962 parser = get_partition_parser(*types);
963 if (!parser)
964 continue;
965 ret = (*parser->parse_fn)(master, pparts, data);
966 put_partition_parser(parser);
967 if (ret > 0) {
968 printk(KERN_NOTICE "%d %s partitions found on MTD device %s\n",
969 ret, parser->name, master->name);
970 break;
971 }
972 }
973 return ret;
974}
975#endif
976
977
978uint64_t mtd_get_device_size(const struct mtd_info *mtd)
979{
980 if (mtd_is_partition(mtd))
981 return mtd->parent->size;
982
983 return mtd->size;
984}
985EXPORT_SYMBOL_GPL(mtd_get_device_size);
986