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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Simple MTD partitioning layer | |
3 | * | |
a1452a37 DW |
4 | * Copyright © 2000 Nicolas Pitre <nico@fluxnic.net> |
5 | * Copyright © 2002 Thomas Gleixner <gleixner@linutronix.de> | |
6 | * Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org> | |
1da177e4 | 7 | * |
a1452a37 DW |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 21 | * |
97894cda | 22 | */ |
1da177e4 LT |
23 | |
24 | #include <linux/module.h> | |
25 | #include <linux/types.h> | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/list.h> | |
1da177e4 LT |
29 | #include <linux/kmod.h> |
30 | #include <linux/mtd/mtd.h> | |
31 | #include <linux/mtd/partitions.h> | |
5daa7b21 | 32 | #include <linux/err.h> |
1da177e4 | 33 | |
eea72d5f JI |
34 | #include "mtdcore.h" |
35 | ||
1da177e4 LT |
36 | /* Our partition linked list */ |
37 | static LIST_HEAD(mtd_partitions); | |
5daa7b21 | 38 | static DEFINE_MUTEX(mtd_partitions_mutex); |
1da177e4 | 39 | |
0a9d72b6 RM |
40 | /** |
41 | * struct mtd_part - our partition node structure | |
42 | * | |
43 | * @mtd: struct holding partition details | |
44 | * @parent: parent mtd - flash device or another partition | |
45 | * @offset: partition offset relative to the *flash device* | |
46 | */ | |
1da177e4 LT |
47 | struct mtd_part { |
48 | struct mtd_info mtd; | |
0a9d72b6 | 49 | struct mtd_info *parent; |
69423d99 | 50 | uint64_t offset; |
1da177e4 | 51 | struct list_head list; |
1da177e4 LT |
52 | }; |
53 | ||
54 | /* | |
55 | * Given a pointer to the MTD object in the mtd_part structure, we can retrieve | |
2524534d | 56 | * the pointer to that structure. |
1da177e4 | 57 | */ |
2524534d BN |
58 | static inline struct mtd_part *mtd_to_part(const struct mtd_info *mtd) |
59 | { | |
60 | return container_of(mtd, struct mtd_part, mtd); | |
61 | } | |
1da177e4 | 62 | |
97894cda TG |
63 | |
64 | /* | |
1da177e4 LT |
65 | * MTD methods which simply translate the effective address and pass through |
66 | * to the _real_ device. | |
67 | */ | |
68 | ||
b33a2887 AN |
69 | static int part_read(struct mtd_info *mtd, loff_t from, size_t len, |
70 | size_t *retlen, u_char *buf) | |
1da177e4 | 71 | { |
2524534d | 72 | struct mtd_part *part = mtd_to_part(mtd); |
d8877f19 | 73 | struct mtd_ecc_stats stats; |
f1a28c02 TG |
74 | int res; |
75 | ||
0a9d72b6 RM |
76 | stats = part->parent->ecc_stats; |
77 | res = part->parent->_read(part->parent, from + part->offset, len, | |
994c8409 | 78 | retlen, buf); |
edbc4540 MD |
79 | if (unlikely(mtd_is_eccerr(res))) |
80 | mtd->ecc_stats.failed += | |
0a9d72b6 | 81 | part->parent->ecc_stats.failed - stats.failed; |
edbc4540 MD |
82 | else |
83 | mtd->ecc_stats.corrected += | |
0a9d72b6 | 84 | part->parent->ecc_stats.corrected - stats.corrected; |
f1a28c02 | 85 | return res; |
1da177e4 LT |
86 | } |
87 | ||
b33a2887 AN |
88 | static int part_point(struct mtd_info *mtd, loff_t from, size_t len, |
89 | size_t *retlen, void **virt, resource_size_t *phys) | |
1da177e4 | 90 | { |
2524534d | 91 | struct mtd_part *part = mtd_to_part(mtd); |
5def4898 | 92 | |
0a9d72b6 | 93 | return part->parent->_point(part->parent, from + part->offset, len, |
994c8409 | 94 | retlen, virt, phys); |
1da177e4 | 95 | } |
9223a456 | 96 | |
5e4e6e3f | 97 | static int part_unpoint(struct mtd_info *mtd, loff_t from, size_t len) |
1da177e4 | 98 | { |
2524534d | 99 | struct mtd_part *part = mtd_to_part(mtd); |
1da177e4 | 100 | |
0a9d72b6 | 101 | return part->parent->_unpoint(part->parent, from + part->offset, len); |
1da177e4 LT |
102 | } |
103 | ||
402d3265 DH |
104 | static unsigned long part_get_unmapped_area(struct mtd_info *mtd, |
105 | unsigned long len, | |
106 | unsigned long offset, | |
107 | unsigned long flags) | |
108 | { | |
2524534d | 109 | struct mtd_part *part = mtd_to_part(mtd); |
402d3265 DH |
110 | |
111 | offset += part->offset; | |
0a9d72b6 | 112 | return part->parent->_get_unmapped_area(part->parent, len, offset, |
994c8409 | 113 | flags); |
402d3265 DH |
114 | } |
115 | ||
8593fbc6 | 116 | static int part_read_oob(struct mtd_info *mtd, loff_t from, |
b33a2887 | 117 | struct mtd_oob_ops *ops) |
1da177e4 | 118 | { |
2524534d | 119 | struct mtd_part *part = mtd_to_part(mtd); |
f1a28c02 | 120 | int res; |
8593fbc6 | 121 | |
1da177e4 | 122 | if (from >= mtd->size) |
8593fbc6 | 123 | return -EINVAL; |
7014568b | 124 | if (ops->datbuf && from + ops->len > mtd->size) |
8593fbc6 | 125 | return -EINVAL; |
f1a28c02 | 126 | |
154bf89f AB |
127 | /* |
128 | * If OOB is also requested, make sure that we do not read past the end | |
129 | * of this partition. | |
130 | */ | |
131 | if (ops->oobbuf) { | |
132 | size_t len, pages; | |
133 | ||
29f1058a | 134 | len = mtd_oobavail(mtd, ops); |
154bf89f AB |
135 | pages = mtd_div_by_ws(mtd->size, mtd); |
136 | pages -= mtd_div_by_ws(from, mtd); | |
137 | if (ops->ooboffs + ops->ooblen > pages * len) | |
138 | return -EINVAL; | |
139 | } | |
140 | ||
0a9d72b6 | 141 | res = part->parent->_read_oob(part->parent, from + part->offset, ops); |
f1a28c02 | 142 | if (unlikely(res)) { |
d57f4054 | 143 | if (mtd_is_bitflip(res)) |
f1a28c02 | 144 | mtd->ecc_stats.corrected++; |
d57f4054 | 145 | if (mtd_is_eccerr(res)) |
f1a28c02 TG |
146 | mtd->ecc_stats.failed++; |
147 | } | |
148 | return res; | |
1da177e4 LT |
149 | } |
150 | ||
b33a2887 AN |
151 | static int part_read_user_prot_reg(struct mtd_info *mtd, loff_t from, |
152 | size_t len, size_t *retlen, u_char *buf) | |
1da177e4 | 153 | { |
2524534d | 154 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 155 | return part->parent->_read_user_prot_reg(part->parent, from, len, |
994c8409 | 156 | retlen, buf); |
1da177e4 LT |
157 | } |
158 | ||
4b78fc42 CR |
159 | static int part_get_user_prot_info(struct mtd_info *mtd, size_t len, |
160 | size_t *retlen, struct otp_info *buf) | |
f77814dd | 161 | { |
2524534d | 162 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 163 | return part->parent->_get_user_prot_info(part->parent, len, retlen, |
4b78fc42 | 164 | buf); |
f77814dd NP |
165 | } |
166 | ||
b33a2887 AN |
167 | static int part_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, |
168 | size_t len, size_t *retlen, u_char *buf) | |
1da177e4 | 169 | { |
2524534d | 170 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 171 | return part->parent->_read_fact_prot_reg(part->parent, from, len, |
994c8409 | 172 | retlen, buf); |
1da177e4 LT |
173 | } |
174 | ||
4b78fc42 CR |
175 | static int part_get_fact_prot_info(struct mtd_info *mtd, size_t len, |
176 | size_t *retlen, struct otp_info *buf) | |
f77814dd | 177 | { |
2524534d | 178 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 179 | return part->parent->_get_fact_prot_info(part->parent, len, retlen, |
4b78fc42 | 180 | buf); |
f77814dd NP |
181 | } |
182 | ||
b33a2887 AN |
183 | static int part_write(struct mtd_info *mtd, loff_t to, size_t len, |
184 | size_t *retlen, const u_char *buf) | |
1da177e4 | 185 | { |
2524534d | 186 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 187 | return part->parent->_write(part->parent, to + part->offset, len, |
994c8409 | 188 | retlen, buf); |
1da177e4 LT |
189 | } |
190 | ||
b33a2887 AN |
191 | static int part_panic_write(struct mtd_info *mtd, loff_t to, size_t len, |
192 | size_t *retlen, const u_char *buf) | |
388bbb09 | 193 | { |
2524534d | 194 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 195 | return part->parent->_panic_write(part->parent, to + part->offset, len, |
994c8409 | 196 | retlen, buf); |
388bbb09 RP |
197 | } |
198 | ||
8593fbc6 | 199 | static int part_write_oob(struct mtd_info *mtd, loff_t to, |
b33a2887 | 200 | struct mtd_oob_ops *ops) |
1da177e4 | 201 | { |
2524534d | 202 | struct mtd_part *part = mtd_to_part(mtd); |
8593fbc6 | 203 | |
1da177e4 | 204 | if (to >= mtd->size) |
8593fbc6 | 205 | return -EINVAL; |
7014568b | 206 | if (ops->datbuf && to + ops->len > mtd->size) |
8593fbc6 | 207 | return -EINVAL; |
0a9d72b6 | 208 | return part->parent->_write_oob(part->parent, to + part->offset, ops); |
1da177e4 LT |
209 | } |
210 | ||
b33a2887 AN |
211 | static int part_write_user_prot_reg(struct mtd_info *mtd, loff_t from, |
212 | size_t len, size_t *retlen, u_char *buf) | |
1da177e4 | 213 | { |
2524534d | 214 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 215 | return part->parent->_write_user_prot_reg(part->parent, from, len, |
994c8409 | 216 | retlen, buf); |
1da177e4 LT |
217 | } |
218 | ||
b33a2887 AN |
219 | static int part_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, |
220 | size_t len) | |
f77814dd | 221 | { |
2524534d | 222 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 223 | return part->parent->_lock_user_prot_reg(part->parent, from, len); |
f77814dd NP |
224 | } |
225 | ||
b33a2887 AN |
226 | static int part_writev(struct mtd_info *mtd, const struct kvec *vecs, |
227 | unsigned long count, loff_t to, size_t *retlen) | |
1da177e4 | 228 | { |
2524534d | 229 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 230 | return part->parent->_writev(part->parent, vecs, count, |
994c8409 | 231 | to + part->offset, retlen); |
1da177e4 LT |
232 | } |
233 | ||
b33a2887 | 234 | static int part_erase(struct mtd_info *mtd, struct erase_info *instr) |
1da177e4 | 235 | { |
2524534d | 236 | struct mtd_part *part = mtd_to_part(mtd); |
1da177e4 | 237 | int ret; |
664addc2 | 238 | |
1da177e4 | 239 | instr->addr += part->offset; |
0a9d72b6 | 240 | ret = part->parent->_erase(part->parent, instr); |
74641d75 | 241 | if (ret) { |
bb0eb217 | 242 | if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) |
74641d75 AH |
243 | instr->fail_addr -= part->offset; |
244 | instr->addr -= part->offset; | |
245 | } | |
1da177e4 LT |
246 | return ret; |
247 | } | |
248 | ||
249 | void mtd_erase_callback(struct erase_info *instr) | |
250 | { | |
3c3c10bb | 251 | if (instr->mtd->_erase == part_erase) { |
2524534d | 252 | struct mtd_part *part = mtd_to_part(instr->mtd); |
1da177e4 | 253 | |
bb0eb217 | 254 | if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) |
1da177e4 LT |
255 | instr->fail_addr -= part->offset; |
256 | instr->addr -= part->offset; | |
257 | } | |
258 | if (instr->callback) | |
259 | instr->callback(instr); | |
260 | } | |
261 | EXPORT_SYMBOL_GPL(mtd_erase_callback); | |
262 | ||
69423d99 | 263 | static int part_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
1da177e4 | 264 | { |
2524534d | 265 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 266 | return part->parent->_lock(part->parent, ofs + part->offset, len); |
1da177e4 LT |
267 | } |
268 | ||
69423d99 | 269 | static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
1da177e4 | 270 | { |
2524534d | 271 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 272 | return part->parent->_unlock(part->parent, ofs + part->offset, len); |
1da177e4 LT |
273 | } |
274 | ||
9938424f RC |
275 | static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
276 | { | |
2524534d | 277 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 278 | return part->parent->_is_locked(part->parent, ofs + part->offset, len); |
9938424f RC |
279 | } |
280 | ||
1da177e4 LT |
281 | static void part_sync(struct mtd_info *mtd) |
282 | { | |
2524534d | 283 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 284 | part->parent->_sync(part->parent); |
1da177e4 LT |
285 | } |
286 | ||
287 | static int part_suspend(struct mtd_info *mtd) | |
288 | { | |
2524534d | 289 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 290 | return part->parent->_suspend(part->parent); |
1da177e4 LT |
291 | } |
292 | ||
293 | static void part_resume(struct mtd_info *mtd) | |
294 | { | |
2524534d | 295 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 296 | part->parent->_resume(part->parent); |
1da177e4 LT |
297 | } |
298 | ||
8471bb73 EG |
299 | static int part_block_isreserved(struct mtd_info *mtd, loff_t ofs) |
300 | { | |
2524534d | 301 | struct mtd_part *part = mtd_to_part(mtd); |
8471bb73 | 302 | ofs += part->offset; |
0a9d72b6 | 303 | return part->parent->_block_isreserved(part->parent, ofs); |
8471bb73 EG |
304 | } |
305 | ||
b33a2887 | 306 | static int part_block_isbad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 | 307 | { |
2524534d | 308 | struct mtd_part *part = mtd_to_part(mtd); |
1da177e4 | 309 | ofs += part->offset; |
0a9d72b6 | 310 | return part->parent->_block_isbad(part->parent, ofs); |
1da177e4 LT |
311 | } |
312 | ||
b33a2887 | 313 | static int part_block_markbad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 | 314 | { |
2524534d | 315 | struct mtd_part *part = mtd_to_part(mtd); |
f1a28c02 TG |
316 | int res; |
317 | ||
1da177e4 | 318 | ofs += part->offset; |
0a9d72b6 | 319 | res = part->parent->_block_markbad(part->parent, ofs); |
f1a28c02 TG |
320 | if (!res) |
321 | mtd->ecc_stats.badblocks++; | |
322 | return res; | |
1da177e4 LT |
323 | } |
324 | ||
5e149073 RW |
325 | static int part_get_device(struct mtd_info *mtd) |
326 | { | |
327 | struct mtd_part *part = mtd_to_part(mtd); | |
0a9d72b6 | 328 | return part->parent->_get_device(part->parent); |
5e149073 RW |
329 | } |
330 | ||
331 | static void part_put_device(struct mtd_info *mtd) | |
332 | { | |
333 | struct mtd_part *part = mtd_to_part(mtd); | |
0a9d72b6 | 334 | part->parent->_put_device(part->parent); |
5e149073 RW |
335 | } |
336 | ||
adbbc3bc BB |
337 | static int part_ooblayout_ecc(struct mtd_info *mtd, int section, |
338 | struct mtd_oob_region *oobregion) | |
339 | { | |
340 | struct mtd_part *part = mtd_to_part(mtd); | |
341 | ||
0a9d72b6 | 342 | return mtd_ooblayout_ecc(part->parent, section, oobregion); |
adbbc3bc BB |
343 | } |
344 | ||
345 | static int part_ooblayout_free(struct mtd_info *mtd, int section, | |
346 | struct mtd_oob_region *oobregion) | |
347 | { | |
348 | struct mtd_part *part = mtd_to_part(mtd); | |
349 | ||
0a9d72b6 | 350 | return mtd_ooblayout_free(part->parent, section, oobregion); |
adbbc3bc BB |
351 | } |
352 | ||
353 | static const struct mtd_ooblayout_ops part_ooblayout_ops = { | |
354 | .ecc = part_ooblayout_ecc, | |
355 | .free = part_ooblayout_free, | |
356 | }; | |
357 | ||
6080ef6e JW |
358 | static int part_max_bad_blocks(struct mtd_info *mtd, loff_t ofs, size_t len) |
359 | { | |
360 | struct mtd_part *part = mtd_to_part(mtd); | |
361 | ||
0a9d72b6 | 362 | return part->parent->_max_bad_blocks(part->parent, |
6080ef6e JW |
363 | ofs + part->offset, len); |
364 | } | |
365 | ||
5daa7b21 RT |
366 | static inline void free_partition(struct mtd_part *p) |
367 | { | |
368 | kfree(p->mtd.name); | |
369 | kfree(p); | |
370 | } | |
371 | ||
0a9d72b6 | 372 | static struct mtd_part *allocate_partition(struct mtd_info *parent, |
5daa7b21 RT |
373 | const struct mtd_partition *part, int partno, |
374 | uint64_t cur_offset) | |
7788ba71 | 375 | { |
0a9d72b6 RM |
376 | int wr_alignment = (parent->flags & MTD_NO_ERASE) ? parent->writesize: |
377 | parent->erasesize; | |
7788ba71 | 378 | struct mtd_part *slave; |
1eeef2d7 | 379 | u32 remainder; |
5daa7b21 | 380 | char *name; |
1eeef2d7 | 381 | u64 tmp; |
7788ba71 AN |
382 | |
383 | /* allocate the partition structure */ | |
b33a2887 | 384 | slave = kzalloc(sizeof(*slave), GFP_KERNEL); |
5daa7b21 RT |
385 | name = kstrdup(part->name, GFP_KERNEL); |
386 | if (!name || !slave) { | |
b33a2887 | 387 | printk(KERN_ERR"memory allocation error while creating partitions for \"%s\"\n", |
0a9d72b6 | 388 | parent->name); |
5daa7b21 RT |
389 | kfree(name); |
390 | kfree(slave); | |
391 | return ERR_PTR(-ENOMEM); | |
7788ba71 | 392 | } |
7788ba71 AN |
393 | |
394 | /* set up the MTD object for this partition */ | |
0a9d72b6 RM |
395 | slave->mtd.type = parent->type; |
396 | slave->mtd.flags = parent->flags & ~part->mask_flags; | |
7788ba71 | 397 | slave->mtd.size = part->size; |
0a9d72b6 RM |
398 | slave->mtd.writesize = parent->writesize; |
399 | slave->mtd.writebufsize = parent->writebufsize; | |
400 | slave->mtd.oobsize = parent->oobsize; | |
401 | slave->mtd.oobavail = parent->oobavail; | |
402 | slave->mtd.subpage_sft = parent->subpage_sft; | |
403 | slave->mtd.pairing = parent->pairing; | |
7788ba71 | 404 | |
5daa7b21 | 405 | slave->mtd.name = name; |
0a9d72b6 | 406 | slave->mtd.owner = parent->owner; |
7788ba71 | 407 | |
727dc612 DE |
408 | /* NOTE: Historically, we didn't arrange MTDs as a tree out of |
409 | * concern for showing the same data in multiple partitions. | |
410 | * However, it is very useful to have the master node present, | |
411 | * so the MTD_PARTITIONED_MASTER option allows that. The master | |
412 | * will have device nodes etc only if this is set, so make the | |
413 | * parent conditional on that option. Note, this is a way to | |
414 | * distinguish between the master and the partition in sysfs. | |
1f24b5a8 | 415 | */ |
727dc612 | 416 | slave->mtd.dev.parent = IS_ENABLED(CONFIG_MTD_PARTITIONED_MASTER) ? |
0a9d72b6 RM |
417 | &parent->dev : |
418 | parent->dev.parent; | |
42e9401b | 419 | slave->mtd.dev.of_node = part->of_node; |
1f24b5a8 | 420 | |
3c3c10bb AB |
421 | slave->mtd._read = part_read; |
422 | slave->mtd._write = part_write; | |
7788ba71 | 423 | |
0a9d72b6 | 424 | if (parent->_panic_write) |
3c3c10bb | 425 | slave->mtd._panic_write = part_panic_write; |
7788ba71 | 426 | |
0a9d72b6 | 427 | if (parent->_point && parent->_unpoint) { |
3c3c10bb AB |
428 | slave->mtd._point = part_point; |
429 | slave->mtd._unpoint = part_unpoint; | |
7788ba71 AN |
430 | } |
431 | ||
0a9d72b6 | 432 | if (parent->_get_unmapped_area) |
3c3c10bb | 433 | slave->mtd._get_unmapped_area = part_get_unmapped_area; |
0a9d72b6 | 434 | if (parent->_read_oob) |
3c3c10bb | 435 | slave->mtd._read_oob = part_read_oob; |
0a9d72b6 | 436 | if (parent->_write_oob) |
3c3c10bb | 437 | slave->mtd._write_oob = part_write_oob; |
0a9d72b6 | 438 | if (parent->_read_user_prot_reg) |
3c3c10bb | 439 | slave->mtd._read_user_prot_reg = part_read_user_prot_reg; |
0a9d72b6 | 440 | if (parent->_read_fact_prot_reg) |
3c3c10bb | 441 | slave->mtd._read_fact_prot_reg = part_read_fact_prot_reg; |
0a9d72b6 | 442 | if (parent->_write_user_prot_reg) |
3c3c10bb | 443 | slave->mtd._write_user_prot_reg = part_write_user_prot_reg; |
0a9d72b6 | 444 | if (parent->_lock_user_prot_reg) |
3c3c10bb | 445 | slave->mtd._lock_user_prot_reg = part_lock_user_prot_reg; |
0a9d72b6 | 446 | if (parent->_get_user_prot_info) |
3c3c10bb | 447 | slave->mtd._get_user_prot_info = part_get_user_prot_info; |
0a9d72b6 | 448 | if (parent->_get_fact_prot_info) |
3c3c10bb | 449 | slave->mtd._get_fact_prot_info = part_get_fact_prot_info; |
0a9d72b6 | 450 | if (parent->_sync) |
3c3c10bb | 451 | slave->mtd._sync = part_sync; |
0a9d72b6 RM |
452 | if (!partno && !parent->dev.class && parent->_suspend && |
453 | parent->_resume) { | |
3c3c10bb AB |
454 | slave->mtd._suspend = part_suspend; |
455 | slave->mtd._resume = part_resume; | |
7788ba71 | 456 | } |
0a9d72b6 | 457 | if (parent->_writev) |
3c3c10bb | 458 | slave->mtd._writev = part_writev; |
0a9d72b6 | 459 | if (parent->_lock) |
3c3c10bb | 460 | slave->mtd._lock = part_lock; |
0a9d72b6 | 461 | if (parent->_unlock) |
3c3c10bb | 462 | slave->mtd._unlock = part_unlock; |
0a9d72b6 | 463 | if (parent->_is_locked) |
3c3c10bb | 464 | slave->mtd._is_locked = part_is_locked; |
0a9d72b6 | 465 | if (parent->_block_isreserved) |
8471bb73 | 466 | slave->mtd._block_isreserved = part_block_isreserved; |
0a9d72b6 | 467 | if (parent->_block_isbad) |
3c3c10bb | 468 | slave->mtd._block_isbad = part_block_isbad; |
0a9d72b6 | 469 | if (parent->_block_markbad) |
3c3c10bb | 470 | slave->mtd._block_markbad = part_block_markbad; |
0a9d72b6 | 471 | if (parent->_max_bad_blocks) |
6080ef6e | 472 | slave->mtd._max_bad_blocks = part_max_bad_blocks; |
5e149073 | 473 | |
0a9d72b6 | 474 | if (parent->_get_device) |
5e149073 | 475 | slave->mtd._get_device = part_get_device; |
0a9d72b6 | 476 | if (parent->_put_device) |
5e149073 RW |
477 | slave->mtd._put_device = part_put_device; |
478 | ||
3c3c10bb | 479 | slave->mtd._erase = part_erase; |
0a9d72b6 | 480 | slave->parent = parent; |
7788ba71 | 481 | slave->offset = part->offset; |
7788ba71 AN |
482 | |
483 | if (slave->offset == MTDPART_OFS_APPEND) | |
484 | slave->offset = cur_offset; | |
485 | if (slave->offset == MTDPART_OFS_NXTBLK) { | |
1eeef2d7 | 486 | tmp = cur_offset; |
7788ba71 | 487 | slave->offset = cur_offset; |
1eeef2d7 CP |
488 | remainder = do_div(tmp, wr_alignment); |
489 | if (remainder) { | |
490 | slave->offset += wr_alignment - remainder; | |
7788ba71 | 491 | printk(KERN_NOTICE "Moving partition %d: " |
69423d99 AH |
492 | "0x%012llx -> 0x%012llx\n", partno, |
493 | (unsigned long long)cur_offset, (unsigned long long)slave->offset); | |
7788ba71 AN |
494 | } |
495 | } | |
1a31368b DES |
496 | if (slave->offset == MTDPART_OFS_RETAIN) { |
497 | slave->offset = cur_offset; | |
0a9d72b6 RM |
498 | if (parent->size - slave->offset >= slave->mtd.size) { |
499 | slave->mtd.size = parent->size - slave->offset | |
1a31368b DES |
500 | - slave->mtd.size; |
501 | } else { | |
502 | printk(KERN_ERR "mtd partition \"%s\" doesn't have enough space: %#llx < %#llx, disabled\n", | |
0a9d72b6 | 503 | part->name, parent->size - slave->offset, |
1a31368b DES |
504 | slave->mtd.size); |
505 | /* register to preserve ordering */ | |
506 | goto out_register; | |
507 | } | |
508 | } | |
7788ba71 | 509 | if (slave->mtd.size == MTDPART_SIZ_FULL) |
0a9d72b6 | 510 | slave->mtd.size = parent->size - slave->offset; |
7788ba71 | 511 | |
69423d99 AH |
512 | printk(KERN_NOTICE "0x%012llx-0x%012llx : \"%s\"\n", (unsigned long long)slave->offset, |
513 | (unsigned long long)(slave->offset + slave->mtd.size), slave->mtd.name); | |
7788ba71 AN |
514 | |
515 | /* let's do some sanity checks */ | |
0a9d72b6 | 516 | if (slave->offset >= parent->size) { |
f636ffb4 | 517 | /* let's register it anyway to preserve ordering */ |
7788ba71 AN |
518 | slave->offset = 0; |
519 | slave->mtd.size = 0; | |
b33a2887 | 520 | printk(KERN_ERR"mtd: partition \"%s\" is out of reach -- disabled\n", |
7788ba71 | 521 | part->name); |
f636ffb4 | 522 | goto out_register; |
7788ba71 | 523 | } |
0a9d72b6 RM |
524 | if (slave->offset + slave->mtd.size > parent->size) { |
525 | slave->mtd.size = parent->size - slave->offset; | |
69423d99 | 526 | printk(KERN_WARNING"mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#llx\n", |
0a9d72b6 | 527 | part->name, parent->name, (unsigned long long)slave->mtd.size); |
7788ba71 | 528 | } |
0a9d72b6 | 529 | if (parent->numeraseregions > 1) { |
7788ba71 | 530 | /* Deal with variable erase size stuff */ |
0a9d72b6 | 531 | int i, max = parent->numeraseregions; |
69423d99 | 532 | u64 end = slave->offset + slave->mtd.size; |
0a9d72b6 | 533 | struct mtd_erase_region_info *regions = parent->eraseregions; |
7788ba71 | 534 | |
6910c136 AN |
535 | /* Find the first erase regions which is part of this |
536 | * partition. */ | |
537 | for (i = 0; i < max && regions[i].offset <= slave->offset; i++) | |
7788ba71 | 538 | ; |
6910c136 | 539 | /* The loop searched for the region _behind_ the first one */ |
a57ca046 RK |
540 | if (i > 0) |
541 | i--; | |
7788ba71 | 542 | |
6910c136 AN |
543 | /* Pick biggest erasesize */ |
544 | for (; i < max && regions[i].offset < end; i++) { | |
7788ba71 AN |
545 | if (slave->mtd.erasesize < regions[i].erasesize) { |
546 | slave->mtd.erasesize = regions[i].erasesize; | |
547 | } | |
548 | } | |
6910c136 | 549 | BUG_ON(slave->mtd.erasesize == 0); |
7788ba71 AN |
550 | } else { |
551 | /* Single erase size */ | |
0a9d72b6 | 552 | slave->mtd.erasesize = parent->erasesize; |
7788ba71 AN |
553 | } |
554 | ||
1eeef2d7 CP |
555 | tmp = slave->offset; |
556 | remainder = do_div(tmp, wr_alignment); | |
557 | if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) { | |
7788ba71 | 558 | /* Doesn't start on a boundary of major erase size */ |
b33a2887 AN |
559 | /* FIXME: Let it be writable if it is on a boundary of |
560 | * _minor_ erase size though */ | |
7788ba71 | 561 | slave->mtd.flags &= ~MTD_WRITEABLE; |
1eeef2d7 | 562 | printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase/write block boundary -- force read-only\n", |
7788ba71 AN |
563 | part->name); |
564 | } | |
1eeef2d7 CP |
565 | |
566 | tmp = slave->mtd.size; | |
567 | remainder = do_div(tmp, wr_alignment); | |
568 | if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) { | |
7788ba71 | 569 | slave->mtd.flags &= ~MTD_WRITEABLE; |
1eeef2d7 | 570 | printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase/write block -- force read-only\n", |
7788ba71 AN |
571 | part->name); |
572 | } | |
573 | ||
adbbc3bc | 574 | mtd_set_ooblayout(&slave->mtd, &part_ooblayout_ops); |
0a9d72b6 RM |
575 | slave->mtd.ecc_step_size = parent->ecc_step_size; |
576 | slave->mtd.ecc_strength = parent->ecc_strength; | |
577 | slave->mtd.bitflip_threshold = parent->bitflip_threshold; | |
d062d4ed | 578 | |
0a9d72b6 | 579 | if (parent->_block_isbad) { |
69423d99 | 580 | uint64_t offs = 0; |
7788ba71 | 581 | |
b33a2887 | 582 | while (offs < slave->mtd.size) { |
0a9d72b6 | 583 | if (mtd_block_isreserved(parent, offs + slave->offset)) |
fdf43a42 | 584 | slave->mtd.ecc_stats.bbtblocks++; |
0a9d72b6 | 585 | else if (mtd_block_isbad(parent, offs + slave->offset)) |
7788ba71 AN |
586 | slave->mtd.ecc_stats.badblocks++; |
587 | offs += slave->mtd.erasesize; | |
588 | } | |
589 | } | |
590 | ||
f636ffb4 | 591 | out_register: |
7788ba71 AN |
592 | return slave; |
593 | } | |
594 | ||
a62c24d7 DE |
595 | static ssize_t mtd_partition_offset_show(struct device *dev, |
596 | struct device_attribute *attr, char *buf) | |
597 | { | |
598 | struct mtd_info *mtd = dev_get_drvdata(dev); | |
2524534d | 599 | struct mtd_part *part = mtd_to_part(mtd); |
a62c24d7 DE |
600 | return snprintf(buf, PAGE_SIZE, "%lld\n", part->offset); |
601 | } | |
602 | ||
603 | static DEVICE_ATTR(offset, S_IRUGO, mtd_partition_offset_show, NULL); | |
604 | ||
605 | static const struct attribute *mtd_partition_attrs[] = { | |
606 | &dev_attr_offset.attr, | |
607 | NULL | |
608 | }; | |
609 | ||
610 | static int mtd_add_partition_attrs(struct mtd_part *new) | |
611 | { | |
612 | int ret = sysfs_create_files(&new->mtd.dev.kobj, mtd_partition_attrs); | |
613 | if (ret) | |
614 | printk(KERN_WARNING | |
615 | "mtd: failed to create partition attrs, err=%d\n", ret); | |
616 | return ret; | |
617 | } | |
618 | ||
0a9d72b6 | 619 | int mtd_add_partition(struct mtd_info *parent, const char *name, |
5daa7b21 RT |
620 | long long offset, long long length) |
621 | { | |
622 | struct mtd_partition part; | |
3a434f66 | 623 | struct mtd_part *new; |
5daa7b21 RT |
624 | int ret = 0; |
625 | ||
626 | /* the direct offset is expected */ | |
627 | if (offset == MTDPART_OFS_APPEND || | |
628 | offset == MTDPART_OFS_NXTBLK) | |
629 | return -EINVAL; | |
630 | ||
631 | if (length == MTDPART_SIZ_FULL) | |
0a9d72b6 | 632 | length = parent->size - offset; |
5daa7b21 RT |
633 | |
634 | if (length <= 0) | |
635 | return -EINVAL; | |
636 | ||
93867233 | 637 | memset(&part, 0, sizeof(part)); |
5daa7b21 RT |
638 | part.name = name; |
639 | part.size = length; | |
640 | part.offset = offset; | |
5daa7b21 | 641 | |
0a9d72b6 | 642 | new = allocate_partition(parent, &part, -1, offset); |
5daa7b21 RT |
643 | if (IS_ERR(new)) |
644 | return PTR_ERR(new); | |
645 | ||
5daa7b21 | 646 | mutex_lock(&mtd_partitions_mutex); |
5daa7b21 RT |
647 | list_add(&new->list, &mtd_partitions); |
648 | mutex_unlock(&mtd_partitions_mutex); | |
649 | ||
650 | add_mtd_device(&new->mtd); | |
651 | ||
a62c24d7 DE |
652 | mtd_add_partition_attrs(new); |
653 | ||
5daa7b21 | 654 | return ret; |
5daa7b21 RT |
655 | } |
656 | EXPORT_SYMBOL_GPL(mtd_add_partition); | |
657 | ||
08263a9a RM |
658 | /** |
659 | * __mtd_del_partition - delete MTD partition | |
660 | * | |
661 | * @priv: internal MTD struct for partition to be deleted | |
662 | * | |
663 | * This function must be called with the partitions mutex locked. | |
664 | */ | |
665 | static int __mtd_del_partition(struct mtd_part *priv) | |
666 | { | |
667 | int err; | |
668 | ||
c5ceaba7 RM |
669 | sysfs_remove_files(&priv->mtd.dev.kobj, mtd_partition_attrs); |
670 | ||
08263a9a RM |
671 | err = del_mtd_device(&priv->mtd); |
672 | if (err) | |
673 | return err; | |
674 | ||
675 | list_del(&priv->list); | |
676 | free_partition(priv); | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | /* | |
682 | * This function unregisters and destroy all slave MTD objects which are | |
683 | * attached to the given master MTD object. | |
684 | */ | |
685 | int del_mtd_partitions(struct mtd_info *master) | |
686 | { | |
687 | struct mtd_part *slave, *next; | |
688 | int ret, err = 0; | |
689 | ||
690 | mutex_lock(&mtd_partitions_mutex); | |
691 | list_for_each_entry_safe(slave, next, &mtd_partitions, list) | |
0a9d72b6 | 692 | if (slave->parent == master) { |
08263a9a RM |
693 | ret = __mtd_del_partition(slave); |
694 | if (ret < 0) | |
695 | err = ret; | |
696 | } | |
697 | mutex_unlock(&mtd_partitions_mutex); | |
698 | ||
699 | return err; | |
700 | } | |
701 | ||
5daa7b21 RT |
702 | int mtd_del_partition(struct mtd_info *master, int partno) |
703 | { | |
704 | struct mtd_part *slave, *next; | |
705 | int ret = -EINVAL; | |
706 | ||
707 | mutex_lock(&mtd_partitions_mutex); | |
708 | list_for_each_entry_safe(slave, next, &mtd_partitions, list) | |
0a9d72b6 | 709 | if ((slave->parent == master) && |
5daa7b21 | 710 | (slave->mtd.index == partno)) { |
08263a9a | 711 | ret = __mtd_del_partition(slave); |
5daa7b21 RT |
712 | break; |
713 | } | |
714 | mutex_unlock(&mtd_partitions_mutex); | |
715 | ||
716 | return ret; | |
717 | } | |
718 | EXPORT_SYMBOL_GPL(mtd_del_partition); | |
719 | ||
1da177e4 LT |
720 | /* |
721 | * This function, given a master MTD object and a partition table, creates | |
722 | * and registers slave MTD objects which are bound to the master according to | |
723 | * the partition definitions. | |
1f24b5a8 | 724 | * |
727dc612 DE |
725 | * For historical reasons, this function's caller only registers the master |
726 | * if the MTD_PARTITIONED_MASTER config option is set. | |
1da177e4 LT |
727 | */ |
728 | ||
97894cda | 729 | int add_mtd_partitions(struct mtd_info *master, |
1da177e4 LT |
730 | const struct mtd_partition *parts, |
731 | int nbparts) | |
732 | { | |
733 | struct mtd_part *slave; | |
69423d99 | 734 | uint64_t cur_offset = 0; |
1da177e4 LT |
735 | int i; |
736 | ||
b33a2887 | 737 | printk(KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name); |
1da177e4 LT |
738 | |
739 | for (i = 0; i < nbparts; i++) { | |
5daa7b21 | 740 | slave = allocate_partition(master, parts + i, i, cur_offset); |
e5bae867 BB |
741 | if (IS_ERR(slave)) { |
742 | del_mtd_partitions(master); | |
5daa7b21 | 743 | return PTR_ERR(slave); |
e5bae867 | 744 | } |
5daa7b21 RT |
745 | |
746 | mutex_lock(&mtd_partitions_mutex); | |
747 | list_add(&slave->list, &mtd_partitions); | |
748 | mutex_unlock(&mtd_partitions_mutex); | |
749 | ||
750 | add_mtd_device(&slave->mtd); | |
a62c24d7 | 751 | mtd_add_partition_attrs(slave); |
5daa7b21 | 752 | |
1da177e4 | 753 | cur_offset = slave->offset + slave->mtd.size; |
1da177e4 LT |
754 | } |
755 | ||
756 | return 0; | |
757 | } | |
1da177e4 LT |
758 | |
759 | static DEFINE_SPINLOCK(part_parser_lock); | |
760 | static LIST_HEAD(part_parsers); | |
761 | ||
5531ae48 | 762 | static struct mtd_part_parser *mtd_part_parser_get(const char *name) |
1da177e4 | 763 | { |
71a928c0 | 764 | struct mtd_part_parser *p, *ret = NULL; |
1da177e4 | 765 | |
71a928c0 | 766 | spin_lock(&part_parser_lock); |
1da177e4 | 767 | |
71a928c0 | 768 | list_for_each_entry(p, &part_parsers, list) |
1da177e4 LT |
769 | if (!strcmp(p->name, name) && try_module_get(p->owner)) { |
770 | ret = p; | |
771 | break; | |
772 | } | |
71a928c0 | 773 | |
1da177e4 LT |
774 | spin_unlock(&part_parser_lock); |
775 | ||
776 | return ret; | |
777 | } | |
778 | ||
5531ae48 BN |
779 | static inline void mtd_part_parser_put(const struct mtd_part_parser *p) |
780 | { | |
781 | module_put(p->owner); | |
782 | } | |
953b3bd1 | 783 | |
adc83bf8 BN |
784 | /* |
785 | * Many partition parsers just expected the core to kfree() all their data in | |
786 | * one chunk. Do that by default. | |
787 | */ | |
788 | static void mtd_part_parser_cleanup_default(const struct mtd_partition *pparts, | |
789 | int nr_parts) | |
790 | { | |
791 | kfree(pparts); | |
792 | } | |
793 | ||
b9eab011 | 794 | int __register_mtd_parser(struct mtd_part_parser *p, struct module *owner) |
1da177e4 | 795 | { |
b9eab011 BN |
796 | p->owner = owner; |
797 | ||
adc83bf8 BN |
798 | if (!p->cleanup) |
799 | p->cleanup = &mtd_part_parser_cleanup_default; | |
800 | ||
1da177e4 LT |
801 | spin_lock(&part_parser_lock); |
802 | list_add(&p->list, &part_parsers); | |
803 | spin_unlock(&part_parser_lock); | |
b9eab011 BN |
804 | |
805 | return 0; | |
1da177e4 | 806 | } |
b9eab011 | 807 | EXPORT_SYMBOL_GPL(__register_mtd_parser); |
1da177e4 | 808 | |
cf3b2b1e | 809 | void deregister_mtd_parser(struct mtd_part_parser *p) |
1da177e4 LT |
810 | { |
811 | spin_lock(&part_parser_lock); | |
812 | list_del(&p->list); | |
813 | spin_unlock(&part_parser_lock); | |
1da177e4 | 814 | } |
b33a2887 | 815 | EXPORT_SYMBOL_GPL(deregister_mtd_parser); |
1da177e4 | 816 | |
ad274cec AB |
817 | /* |
818 | * Do not forget to update 'parse_mtd_partitions()' kerneldoc comment if you | |
819 | * are changing this array! | |
820 | */ | |
ccef4dcc | 821 | static const char * const default_mtd_part_types[] = { |
d26c87d6 DES |
822 | "cmdlinepart", |
823 | "ofpart", | |
824 | NULL | |
825 | }; | |
5c4eefbd | 826 | |
01f9c724 BN |
827 | static int mtd_part_do_parse(struct mtd_part_parser *parser, |
828 | struct mtd_info *master, | |
829 | struct mtd_partitions *pparts, | |
830 | struct mtd_part_parser_data *data) | |
831 | { | |
832 | int ret; | |
833 | ||
834 | ret = (*parser->parse_fn)(master, &pparts->parts, data); | |
835 | pr_debug("%s: parser %s: %i\n", master->name, parser->name, ret); | |
836 | if (ret <= 0) | |
837 | return ret; | |
838 | ||
839 | pr_notice("%d %s partitions found on MTD device %s\n", ret, | |
840 | parser->name, master->name); | |
841 | ||
842 | pparts->nr_parts = ret; | |
843 | pparts->parser = parser; | |
844 | ||
845 | return ret; | |
846 | } | |
847 | ||
ad274cec AB |
848 | /** |
849 | * parse_mtd_partitions - parse MTD partitions | |
850 | * @master: the master partition (describes whole MTD device) | |
851 | * @types: names of partition parsers to try or %NULL | |
07fd2f87 | 852 | * @pparts: info about partitions found is returned here |
c7975330 | 853 | * @data: MTD partition parser-specific data |
ad274cec AB |
854 | * |
855 | * This function tries to find partition on MTD device @master. It uses MTD | |
856 | * partition parsers, specified in @types. However, if @types is %NULL, then | |
857 | * the default list of parsers is used. The default list contains only the | |
d26c87d6 | 858 | * "cmdlinepart" and "ofpart" parsers ATM. |
c51803dd HS |
859 | * Note: If there are more then one parser in @types, the kernel only takes the |
860 | * partitions parsed out by the first parser. | |
ad274cec AB |
861 | * |
862 | * This function may return: | |
863 | * o a negative error code in case of failure | |
07fd2f87 | 864 | * o zero otherwise, and @pparts will describe the partitions, number of |
adc83bf8 BN |
865 | * partitions, and the parser which parsed them. Caller must release |
866 | * resources with mtd_part_parser_cleanup() when finished with the returned | |
867 | * data. | |
ad274cec | 868 | */ |
26a47346 | 869 | int parse_mtd_partitions(struct mtd_info *master, const char *const *types, |
07fd2f87 | 870 | struct mtd_partitions *pparts, |
c7975330 | 871 | struct mtd_part_parser_data *data) |
1da177e4 LT |
872 | { |
873 | struct mtd_part_parser *parser; | |
5a2415b0 | 874 | int ret, err = 0; |
97894cda | 875 | |
5c4eefbd DES |
876 | if (!types) |
877 | types = default_mtd_part_types; | |
878 | ||
5a2415b0 | 879 | for ( ; *types; types++) { |
8e2c992b | 880 | pr_debug("%s: parsing partitions %s\n", master->name, *types); |
5531ae48 | 881 | parser = mtd_part_parser_get(*types); |
1da177e4 | 882 | if (!parser && !request_module("%s", *types)) |
5531ae48 | 883 | parser = mtd_part_parser_get(*types); |
8e2c992b MS |
884 | pr_debug("%s: got parser %s\n", master->name, |
885 | parser ? parser->name : NULL); | |
7c802fbd | 886 | if (!parser) |
1da177e4 | 887 | continue; |
01f9c724 BN |
888 | ret = mtd_part_do_parse(parser, master, pparts, data); |
889 | /* Found partitions! */ | |
890 | if (ret > 0) | |
07fd2f87 | 891 | return 0; |
adc83bf8 | 892 | mtd_part_parser_put(parser); |
5a2415b0 BN |
893 | /* |
894 | * Stash the first error we see; only report it if no parser | |
895 | * succeeds | |
896 | */ | |
897 | if (ret < 0 && !err) | |
898 | err = ret; | |
1da177e4 | 899 | } |
5a2415b0 | 900 | return err; |
1da177e4 | 901 | } |
5daa7b21 | 902 | |
adc83bf8 BN |
903 | void mtd_part_parser_cleanup(struct mtd_partitions *parts) |
904 | { | |
905 | const struct mtd_part_parser *parser; | |
906 | ||
907 | if (!parts) | |
908 | return; | |
909 | ||
910 | parser = parts->parser; | |
911 | if (parser) { | |
912 | if (parser->cleanup) | |
913 | parser->cleanup(parts->parts, parts->nr_parts); | |
914 | ||
915 | mtd_part_parser_put(parser); | |
916 | } | |
917 | } | |
918 | ||
5dee4674 | 919 | int mtd_is_partition(const struct mtd_info *mtd) |
5daa7b21 RT |
920 | { |
921 | struct mtd_part *part; | |
a7e93dcd | 922 | int ispart = 0; |
5daa7b21 RT |
923 | |
924 | mutex_lock(&mtd_partitions_mutex); | |
925 | list_for_each_entry(part, &mtd_partitions, list) | |
926 | if (&part->mtd == mtd) { | |
a7e93dcd | 927 | ispart = 1; |
5daa7b21 RT |
928 | break; |
929 | } | |
930 | mutex_unlock(&mtd_partitions_mutex); | |
931 | ||
a7e93dcd | 932 | return ispart; |
5daa7b21 | 933 | } |
a7e93dcd | 934 | EXPORT_SYMBOL_GPL(mtd_is_partition); |
62082e56 RG |
935 | |
936 | /* Returns the size of the entire flash chip */ | |
937 | uint64_t mtd_get_device_size(const struct mtd_info *mtd) | |
938 | { | |
939 | if (!mtd_is_partition(mtd)) | |
940 | return mtd->size; | |
941 | ||
0a9d72b6 | 942 | return mtd_to_part(mtd)->parent->size; |
62082e56 RG |
943 | } |
944 | EXPORT_SYMBOL_GPL(mtd_get_device_size); |