Commit | Line | Data |
---|---|---|
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> |
5b644aa0 | 33 | #include <linux/of.h> |
1da177e4 | 34 | |
eea72d5f JI |
35 | #include "mtdcore.h" |
36 | ||
1da177e4 LT |
37 | /* Our partition linked list */ |
38 | static LIST_HEAD(mtd_partitions); | |
5daa7b21 | 39 | static DEFINE_MUTEX(mtd_partitions_mutex); |
1da177e4 | 40 | |
0a9d72b6 RM |
41 | /** |
42 | * struct mtd_part - our partition node structure | |
43 | * | |
44 | * @mtd: struct holding partition details | |
45 | * @parent: parent mtd - flash device or another partition | |
46 | * @offset: partition offset relative to the *flash device* | |
47 | */ | |
1da177e4 LT |
48 | struct mtd_part { |
49 | struct mtd_info mtd; | |
0a9d72b6 | 50 | struct mtd_info *parent; |
69423d99 | 51 | uint64_t offset; |
1da177e4 | 52 | struct list_head list; |
1da177e4 LT |
53 | }; |
54 | ||
55 | /* | |
56 | * Given a pointer to the MTD object in the mtd_part structure, we can retrieve | |
2524534d | 57 | * the pointer to that structure. |
1da177e4 | 58 | */ |
2524534d BN |
59 | static inline struct mtd_part *mtd_to_part(const struct mtd_info *mtd) |
60 | { | |
61 | return container_of(mtd, struct mtd_part, mtd); | |
62 | } | |
1da177e4 | 63 | |
6750f61a RM |
64 | static u64 part_absolute_offset(struct mtd_info *mtd) |
65 | { | |
66 | struct mtd_part *part = mtd_to_part(mtd); | |
67 | ||
68 | if (!mtd_is_partition(mtd)) | |
69 | return 0; | |
70 | ||
71 | return part_absolute_offset(part->parent) + part->offset; | |
72 | } | |
97894cda TG |
73 | |
74 | /* | |
1da177e4 LT |
75 | * MTD methods which simply translate the effective address and pass through |
76 | * to the _real_ device. | |
77 | */ | |
78 | ||
b33a2887 AN |
79 | static int part_read(struct mtd_info *mtd, loff_t from, size_t len, |
80 | size_t *retlen, u_char *buf) | |
1da177e4 | 81 | { |
2524534d | 82 | struct mtd_part *part = mtd_to_part(mtd); |
d8877f19 | 83 | struct mtd_ecc_stats stats; |
f1a28c02 TG |
84 | int res; |
85 | ||
0a9d72b6 RM |
86 | stats = part->parent->ecc_stats; |
87 | res = part->parent->_read(part->parent, from + part->offset, len, | |
994c8409 | 88 | retlen, buf); |
edbc4540 MD |
89 | if (unlikely(mtd_is_eccerr(res))) |
90 | mtd->ecc_stats.failed += | |
0a9d72b6 | 91 | part->parent->ecc_stats.failed - stats.failed; |
edbc4540 MD |
92 | else |
93 | mtd->ecc_stats.corrected += | |
0a9d72b6 | 94 | part->parent->ecc_stats.corrected - stats.corrected; |
f1a28c02 | 95 | return res; |
1da177e4 LT |
96 | } |
97 | ||
b33a2887 AN |
98 | static int part_point(struct mtd_info *mtd, loff_t from, size_t len, |
99 | size_t *retlen, void **virt, resource_size_t *phys) | |
1da177e4 | 100 | { |
2524534d | 101 | struct mtd_part *part = mtd_to_part(mtd); |
5def4898 | 102 | |
0a9d72b6 | 103 | return part->parent->_point(part->parent, from + part->offset, len, |
994c8409 | 104 | retlen, virt, phys); |
1da177e4 | 105 | } |
9223a456 | 106 | |
5e4e6e3f | 107 | static int part_unpoint(struct mtd_info *mtd, loff_t from, size_t len) |
1da177e4 | 108 | { |
2524534d | 109 | struct mtd_part *part = mtd_to_part(mtd); |
1da177e4 | 110 | |
0a9d72b6 | 111 | return part->parent->_unpoint(part->parent, from + part->offset, len); |
1da177e4 LT |
112 | } |
113 | ||
8593fbc6 | 114 | static int part_read_oob(struct mtd_info *mtd, loff_t from, |
b33a2887 | 115 | struct mtd_oob_ops *ops) |
1da177e4 | 116 | { |
2524534d | 117 | struct mtd_part *part = mtd_to_part(mtd); |
d020fc8e | 118 | struct mtd_ecc_stats stats; |
f1a28c02 | 119 | int res; |
8593fbc6 | 120 | |
d020fc8e | 121 | stats = part->parent->ecc_stats; |
0a9d72b6 | 122 | res = part->parent->_read_oob(part->parent, from + part->offset, ops); |
d020fc8e BB |
123 | if (unlikely(mtd_is_eccerr(res))) |
124 | mtd->ecc_stats.failed += | |
125 | part->parent->ecc_stats.failed - stats.failed; | |
126 | else | |
127 | mtd->ecc_stats.corrected += | |
128 | part->parent->ecc_stats.corrected - stats.corrected; | |
f1a28c02 | 129 | return res; |
1da177e4 LT |
130 | } |
131 | ||
b33a2887 AN |
132 | static int part_read_user_prot_reg(struct mtd_info *mtd, loff_t from, |
133 | size_t len, size_t *retlen, u_char *buf) | |
1da177e4 | 134 | { |
2524534d | 135 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 136 | return part->parent->_read_user_prot_reg(part->parent, from, len, |
994c8409 | 137 | retlen, buf); |
1da177e4 LT |
138 | } |
139 | ||
4b78fc42 CR |
140 | static int part_get_user_prot_info(struct mtd_info *mtd, size_t len, |
141 | size_t *retlen, struct otp_info *buf) | |
f77814dd | 142 | { |
2524534d | 143 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 144 | return part->parent->_get_user_prot_info(part->parent, len, retlen, |
4b78fc42 | 145 | buf); |
f77814dd NP |
146 | } |
147 | ||
b33a2887 AN |
148 | static int part_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, |
149 | size_t len, size_t *retlen, u_char *buf) | |
1da177e4 | 150 | { |
2524534d | 151 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 152 | return part->parent->_read_fact_prot_reg(part->parent, from, len, |
994c8409 | 153 | retlen, buf); |
1da177e4 LT |
154 | } |
155 | ||
4b78fc42 CR |
156 | static int part_get_fact_prot_info(struct mtd_info *mtd, size_t len, |
157 | size_t *retlen, struct otp_info *buf) | |
f77814dd | 158 | { |
2524534d | 159 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 160 | return part->parent->_get_fact_prot_info(part->parent, len, retlen, |
4b78fc42 | 161 | buf); |
f77814dd NP |
162 | } |
163 | ||
b33a2887 AN |
164 | static int part_write(struct mtd_info *mtd, loff_t to, size_t len, |
165 | size_t *retlen, const u_char *buf) | |
1da177e4 | 166 | { |
2524534d | 167 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 168 | return part->parent->_write(part->parent, to + part->offset, len, |
994c8409 | 169 | retlen, buf); |
1da177e4 LT |
170 | } |
171 | ||
b33a2887 AN |
172 | static int part_panic_write(struct mtd_info *mtd, loff_t to, size_t len, |
173 | size_t *retlen, const u_char *buf) | |
388bbb09 | 174 | { |
2524534d | 175 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 176 | return part->parent->_panic_write(part->parent, to + part->offset, len, |
994c8409 | 177 | retlen, buf); |
388bbb09 RP |
178 | } |
179 | ||
8593fbc6 | 180 | static int part_write_oob(struct mtd_info *mtd, loff_t to, |
b33a2887 | 181 | struct mtd_oob_ops *ops) |
1da177e4 | 182 | { |
2524534d | 183 | struct mtd_part *part = mtd_to_part(mtd); |
8593fbc6 | 184 | |
0a9d72b6 | 185 | return part->parent->_write_oob(part->parent, to + part->offset, ops); |
1da177e4 LT |
186 | } |
187 | ||
b33a2887 AN |
188 | static int part_write_user_prot_reg(struct mtd_info *mtd, loff_t from, |
189 | size_t len, size_t *retlen, u_char *buf) | |
1da177e4 | 190 | { |
2524534d | 191 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 192 | return part->parent->_write_user_prot_reg(part->parent, from, len, |
994c8409 | 193 | retlen, buf); |
1da177e4 LT |
194 | } |
195 | ||
b33a2887 AN |
196 | static int part_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, |
197 | size_t len) | |
f77814dd | 198 | { |
2524534d | 199 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 200 | return part->parent->_lock_user_prot_reg(part->parent, from, len); |
f77814dd NP |
201 | } |
202 | ||
b33a2887 AN |
203 | static int part_writev(struct mtd_info *mtd, const struct kvec *vecs, |
204 | unsigned long count, loff_t to, size_t *retlen) | |
1da177e4 | 205 | { |
2524534d | 206 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 207 | return part->parent->_writev(part->parent, vecs, count, |
994c8409 | 208 | to + part->offset, retlen); |
1da177e4 LT |
209 | } |
210 | ||
b33a2887 | 211 | static int part_erase(struct mtd_info *mtd, struct erase_info *instr) |
1da177e4 | 212 | { |
2524534d | 213 | struct mtd_part *part = mtd_to_part(mtd); |
1da177e4 | 214 | int ret; |
664addc2 | 215 | |
1da177e4 | 216 | instr->addr += part->offset; |
0a9d72b6 | 217 | ret = part->parent->_erase(part->parent, instr); |
8f347c42 BB |
218 | if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) |
219 | instr->fail_addr -= part->offset; | |
220 | instr->addr -= part->offset; | |
221 | ||
1da177e4 LT |
222 | return ret; |
223 | } | |
224 | ||
69423d99 | 225 | static int part_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
1da177e4 | 226 | { |
2524534d | 227 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 228 | return part->parent->_lock(part->parent, ofs + part->offset, len); |
1da177e4 LT |
229 | } |
230 | ||
69423d99 | 231 | static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
1da177e4 | 232 | { |
2524534d | 233 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 234 | return part->parent->_unlock(part->parent, ofs + part->offset, len); |
1da177e4 LT |
235 | } |
236 | ||
9938424f RC |
237 | static int part_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
238 | { | |
2524534d | 239 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 240 | return part->parent->_is_locked(part->parent, ofs + part->offset, len); |
9938424f RC |
241 | } |
242 | ||
1da177e4 LT |
243 | static void part_sync(struct mtd_info *mtd) |
244 | { | |
2524534d | 245 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 246 | part->parent->_sync(part->parent); |
1da177e4 LT |
247 | } |
248 | ||
249 | static int part_suspend(struct mtd_info *mtd) | |
250 | { | |
2524534d | 251 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 252 | return part->parent->_suspend(part->parent); |
1da177e4 LT |
253 | } |
254 | ||
255 | static void part_resume(struct mtd_info *mtd) | |
256 | { | |
2524534d | 257 | struct mtd_part *part = mtd_to_part(mtd); |
0a9d72b6 | 258 | part->parent->_resume(part->parent); |
1da177e4 LT |
259 | } |
260 | ||
8471bb73 EG |
261 | static int part_block_isreserved(struct mtd_info *mtd, loff_t ofs) |
262 | { | |
2524534d | 263 | struct mtd_part *part = mtd_to_part(mtd); |
8471bb73 | 264 | ofs += part->offset; |
0a9d72b6 | 265 | return part->parent->_block_isreserved(part->parent, ofs); |
8471bb73 EG |
266 | } |
267 | ||
b33a2887 | 268 | static int part_block_isbad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 | 269 | { |
2524534d | 270 | struct mtd_part *part = mtd_to_part(mtd); |
1da177e4 | 271 | ofs += part->offset; |
0a9d72b6 | 272 | return part->parent->_block_isbad(part->parent, ofs); |
1da177e4 LT |
273 | } |
274 | ||
b33a2887 | 275 | static int part_block_markbad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 | 276 | { |
2524534d | 277 | struct mtd_part *part = mtd_to_part(mtd); |
f1a28c02 TG |
278 | int res; |
279 | ||
1da177e4 | 280 | ofs += part->offset; |
0a9d72b6 | 281 | res = part->parent->_block_markbad(part->parent, ofs); |
f1a28c02 TG |
282 | if (!res) |
283 | mtd->ecc_stats.badblocks++; | |
284 | return res; | |
1da177e4 LT |
285 | } |
286 | ||
5e149073 RW |
287 | static int part_get_device(struct mtd_info *mtd) |
288 | { | |
289 | struct mtd_part *part = mtd_to_part(mtd); | |
0a9d72b6 | 290 | return part->parent->_get_device(part->parent); |
5e149073 RW |
291 | } |
292 | ||
293 | static void part_put_device(struct mtd_info *mtd) | |
294 | { | |
295 | struct mtd_part *part = mtd_to_part(mtd); | |
0a9d72b6 | 296 | part->parent->_put_device(part->parent); |
5e149073 RW |
297 | } |
298 | ||
adbbc3bc BB |
299 | static int part_ooblayout_ecc(struct mtd_info *mtd, int section, |
300 | struct mtd_oob_region *oobregion) | |
301 | { | |
302 | struct mtd_part *part = mtd_to_part(mtd); | |
303 | ||
0a9d72b6 | 304 | return mtd_ooblayout_ecc(part->parent, section, oobregion); |
adbbc3bc BB |
305 | } |
306 | ||
307 | static int part_ooblayout_free(struct mtd_info *mtd, int section, | |
308 | struct mtd_oob_region *oobregion) | |
309 | { | |
310 | struct mtd_part *part = mtd_to_part(mtd); | |
311 | ||
0a9d72b6 | 312 | return mtd_ooblayout_free(part->parent, section, oobregion); |
adbbc3bc BB |
313 | } |
314 | ||
315 | static const struct mtd_ooblayout_ops part_ooblayout_ops = { | |
316 | .ecc = part_ooblayout_ecc, | |
317 | .free = part_ooblayout_free, | |
318 | }; | |
319 | ||
6080ef6e JW |
320 | static int part_max_bad_blocks(struct mtd_info *mtd, loff_t ofs, size_t len) |
321 | { | |
322 | struct mtd_part *part = mtd_to_part(mtd); | |
323 | ||
0a9d72b6 | 324 | return part->parent->_max_bad_blocks(part->parent, |
6080ef6e JW |
325 | ofs + part->offset, len); |
326 | } | |
327 | ||
5daa7b21 RT |
328 | static inline void free_partition(struct mtd_part *p) |
329 | { | |
330 | kfree(p->mtd.name); | |
331 | kfree(p); | |
332 | } | |
333 | ||
0a9d72b6 | 334 | static struct mtd_part *allocate_partition(struct mtd_info *parent, |
5daa7b21 RT |
335 | const struct mtd_partition *part, int partno, |
336 | uint64_t cur_offset) | |
7788ba71 | 337 | { |
c169e3d3 | 338 | int wr_alignment = (parent->flags & MTD_NO_ERASE) ? parent->writesize : |
0a9d72b6 | 339 | parent->erasesize; |
7788ba71 | 340 | struct mtd_part *slave; |
1eeef2d7 | 341 | u32 remainder; |
5daa7b21 | 342 | char *name; |
1eeef2d7 | 343 | u64 tmp; |
7788ba71 AN |
344 | |
345 | /* allocate the partition structure */ | |
b33a2887 | 346 | slave = kzalloc(sizeof(*slave), GFP_KERNEL); |
5daa7b21 RT |
347 | name = kstrdup(part->name, GFP_KERNEL); |
348 | if (!name || !slave) { | |
b33a2887 | 349 | printk(KERN_ERR"memory allocation error while creating partitions for \"%s\"\n", |
0a9d72b6 | 350 | parent->name); |
5daa7b21 RT |
351 | kfree(name); |
352 | kfree(slave); | |
353 | return ERR_PTR(-ENOMEM); | |
7788ba71 | 354 | } |
7788ba71 AN |
355 | |
356 | /* set up the MTD object for this partition */ | |
0a9d72b6 | 357 | slave->mtd.type = parent->type; |
1186af45 RM |
358 | slave->mtd.flags = parent->orig_flags & ~part->mask_flags; |
359 | slave->mtd.orig_flags = slave->mtd.flags; | |
7788ba71 | 360 | slave->mtd.size = part->size; |
0a9d72b6 RM |
361 | slave->mtd.writesize = parent->writesize; |
362 | slave->mtd.writebufsize = parent->writebufsize; | |
363 | slave->mtd.oobsize = parent->oobsize; | |
364 | slave->mtd.oobavail = parent->oobavail; | |
365 | slave->mtd.subpage_sft = parent->subpage_sft; | |
366 | slave->mtd.pairing = parent->pairing; | |
7788ba71 | 367 | |
5daa7b21 | 368 | slave->mtd.name = name; |
0a9d72b6 | 369 | slave->mtd.owner = parent->owner; |
7788ba71 | 370 | |
727dc612 DE |
371 | /* NOTE: Historically, we didn't arrange MTDs as a tree out of |
372 | * concern for showing the same data in multiple partitions. | |
373 | * However, it is very useful to have the master node present, | |
374 | * so the MTD_PARTITIONED_MASTER option allows that. The master | |
375 | * will have device nodes etc only if this is set, so make the | |
376 | * parent conditional on that option. Note, this is a way to | |
377 | * distinguish between the master and the partition in sysfs. | |
1f24b5a8 | 378 | */ |
97519dc5 | 379 | slave->mtd.dev.parent = IS_ENABLED(CONFIG_MTD_PARTITIONED_MASTER) || mtd_is_partition(parent) ? |
0a9d72b6 RM |
380 | &parent->dev : |
381 | parent->dev.parent; | |
42e9401b | 382 | slave->mtd.dev.of_node = part->of_node; |
1f24b5a8 | 383 | |
24ff1292 BB |
384 | if (parent->_read) |
385 | slave->mtd._read = part_read; | |
386 | if (parent->_write) | |
387 | slave->mtd._write = part_write; | |
7788ba71 | 388 | |
0a9d72b6 | 389 | if (parent->_panic_write) |
3c3c10bb | 390 | slave->mtd._panic_write = part_panic_write; |
7788ba71 | 391 | |
0a9d72b6 | 392 | if (parent->_point && parent->_unpoint) { |
3c3c10bb AB |
393 | slave->mtd._point = part_point; |
394 | slave->mtd._unpoint = part_unpoint; | |
7788ba71 AN |
395 | } |
396 | ||
0a9d72b6 | 397 | if (parent->_read_oob) |
3c3c10bb | 398 | slave->mtd._read_oob = part_read_oob; |
0a9d72b6 | 399 | if (parent->_write_oob) |
3c3c10bb | 400 | slave->mtd._write_oob = part_write_oob; |
0a9d72b6 | 401 | if (parent->_read_user_prot_reg) |
3c3c10bb | 402 | slave->mtd._read_user_prot_reg = part_read_user_prot_reg; |
0a9d72b6 | 403 | if (parent->_read_fact_prot_reg) |
3c3c10bb | 404 | slave->mtd._read_fact_prot_reg = part_read_fact_prot_reg; |
0a9d72b6 | 405 | if (parent->_write_user_prot_reg) |
3c3c10bb | 406 | slave->mtd._write_user_prot_reg = part_write_user_prot_reg; |
0a9d72b6 | 407 | if (parent->_lock_user_prot_reg) |
3c3c10bb | 408 | slave->mtd._lock_user_prot_reg = part_lock_user_prot_reg; |
0a9d72b6 | 409 | if (parent->_get_user_prot_info) |
3c3c10bb | 410 | slave->mtd._get_user_prot_info = part_get_user_prot_info; |
0a9d72b6 | 411 | if (parent->_get_fact_prot_info) |
3c3c10bb | 412 | slave->mtd._get_fact_prot_info = part_get_fact_prot_info; |
0a9d72b6 | 413 | if (parent->_sync) |
3c3c10bb | 414 | slave->mtd._sync = part_sync; |
0a9d72b6 RM |
415 | if (!partno && !parent->dev.class && parent->_suspend && |
416 | parent->_resume) { | |
c169e3d3 BN |
417 | slave->mtd._suspend = part_suspend; |
418 | slave->mtd._resume = part_resume; | |
7788ba71 | 419 | } |
0a9d72b6 | 420 | if (parent->_writev) |
3c3c10bb | 421 | slave->mtd._writev = part_writev; |
0a9d72b6 | 422 | if (parent->_lock) |
3c3c10bb | 423 | slave->mtd._lock = part_lock; |
0a9d72b6 | 424 | if (parent->_unlock) |
3c3c10bb | 425 | slave->mtd._unlock = part_unlock; |
0a9d72b6 | 426 | if (parent->_is_locked) |
3c3c10bb | 427 | slave->mtd._is_locked = part_is_locked; |
0a9d72b6 | 428 | if (parent->_block_isreserved) |
8471bb73 | 429 | slave->mtd._block_isreserved = part_block_isreserved; |
0a9d72b6 | 430 | if (parent->_block_isbad) |
3c3c10bb | 431 | slave->mtd._block_isbad = part_block_isbad; |
0a9d72b6 | 432 | if (parent->_block_markbad) |
3c3c10bb | 433 | slave->mtd._block_markbad = part_block_markbad; |
0a9d72b6 | 434 | if (parent->_max_bad_blocks) |
6080ef6e | 435 | slave->mtd._max_bad_blocks = part_max_bad_blocks; |
5e149073 | 436 | |
0a9d72b6 | 437 | if (parent->_get_device) |
5e149073 | 438 | slave->mtd._get_device = part_get_device; |
0a9d72b6 | 439 | if (parent->_put_device) |
5e149073 RW |
440 | slave->mtd._put_device = part_put_device; |
441 | ||
3c3c10bb | 442 | slave->mtd._erase = part_erase; |
0a9d72b6 | 443 | slave->parent = parent; |
7788ba71 | 444 | slave->offset = part->offset; |
7788ba71 AN |
445 | |
446 | if (slave->offset == MTDPART_OFS_APPEND) | |
447 | slave->offset = cur_offset; | |
448 | if (slave->offset == MTDPART_OFS_NXTBLK) { | |
1eeef2d7 | 449 | tmp = cur_offset; |
7788ba71 | 450 | slave->offset = cur_offset; |
1eeef2d7 CP |
451 | remainder = do_div(tmp, wr_alignment); |
452 | if (remainder) { | |
453 | slave->offset += wr_alignment - remainder; | |
7788ba71 | 454 | printk(KERN_NOTICE "Moving partition %d: " |
69423d99 AH |
455 | "0x%012llx -> 0x%012llx\n", partno, |
456 | (unsigned long long)cur_offset, (unsigned long long)slave->offset); | |
7788ba71 AN |
457 | } |
458 | } | |
1a31368b DES |
459 | if (slave->offset == MTDPART_OFS_RETAIN) { |
460 | slave->offset = cur_offset; | |
0a9d72b6 RM |
461 | if (parent->size - slave->offset >= slave->mtd.size) { |
462 | slave->mtd.size = parent->size - slave->offset | |
1a31368b DES |
463 | - slave->mtd.size; |
464 | } else { | |
465 | printk(KERN_ERR "mtd partition \"%s\" doesn't have enough space: %#llx < %#llx, disabled\n", | |
0a9d72b6 | 466 | part->name, parent->size - slave->offset, |
1a31368b DES |
467 | slave->mtd.size); |
468 | /* register to preserve ordering */ | |
469 | goto out_register; | |
470 | } | |
471 | } | |
7788ba71 | 472 | if (slave->mtd.size == MTDPART_SIZ_FULL) |
0a9d72b6 | 473 | slave->mtd.size = parent->size - slave->offset; |
7788ba71 | 474 | |
69423d99 AH |
475 | printk(KERN_NOTICE "0x%012llx-0x%012llx : \"%s\"\n", (unsigned long long)slave->offset, |
476 | (unsigned long long)(slave->offset + slave->mtd.size), slave->mtd.name); | |
7788ba71 AN |
477 | |
478 | /* let's do some sanity checks */ | |
0a9d72b6 | 479 | if (slave->offset >= parent->size) { |
f636ffb4 | 480 | /* let's register it anyway to preserve ordering */ |
7788ba71 AN |
481 | slave->offset = 0; |
482 | slave->mtd.size = 0; | |
ad463515 BB |
483 | |
484 | /* Initialize ->erasesize to make add_mtd_device() happy. */ | |
485 | slave->mtd.erasesize = parent->erasesize; | |
486 | ||
b33a2887 | 487 | printk(KERN_ERR"mtd: partition \"%s\" is out of reach -- disabled\n", |
7788ba71 | 488 | part->name); |
f636ffb4 | 489 | goto out_register; |
7788ba71 | 490 | } |
0a9d72b6 RM |
491 | if (slave->offset + slave->mtd.size > parent->size) { |
492 | slave->mtd.size = parent->size - slave->offset; | |
69423d99 | 493 | printk(KERN_WARNING"mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#llx\n", |
0a9d72b6 | 494 | part->name, parent->name, (unsigned long long)slave->mtd.size); |
7788ba71 | 495 | } |
0a9d72b6 | 496 | if (parent->numeraseregions > 1) { |
7788ba71 | 497 | /* Deal with variable erase size stuff */ |
0a9d72b6 | 498 | int i, max = parent->numeraseregions; |
69423d99 | 499 | u64 end = slave->offset + slave->mtd.size; |
0a9d72b6 | 500 | struct mtd_erase_region_info *regions = parent->eraseregions; |
7788ba71 | 501 | |
6910c136 AN |
502 | /* Find the first erase regions which is part of this |
503 | * partition. */ | |
504 | for (i = 0; i < max && regions[i].offset <= slave->offset; i++) | |
7788ba71 | 505 | ; |
6910c136 | 506 | /* The loop searched for the region _behind_ the first one */ |
a57ca046 RK |
507 | if (i > 0) |
508 | i--; | |
7788ba71 | 509 | |
6910c136 AN |
510 | /* Pick biggest erasesize */ |
511 | for (; i < max && regions[i].offset < end; i++) { | |
7788ba71 AN |
512 | if (slave->mtd.erasesize < regions[i].erasesize) { |
513 | slave->mtd.erasesize = regions[i].erasesize; | |
514 | } | |
515 | } | |
6910c136 | 516 | BUG_ON(slave->mtd.erasesize == 0); |
7788ba71 AN |
517 | } else { |
518 | /* Single erase size */ | |
0a9d72b6 | 519 | slave->mtd.erasesize = parent->erasesize; |
7788ba71 AN |
520 | } |
521 | ||
7e439681 BB |
522 | /* |
523 | * Slave erasesize might differ from the master one if the master | |
524 | * exposes several regions with different erasesize. Adjust | |
525 | * wr_alignment accordingly. | |
526 | */ | |
527 | if (!(slave->mtd.flags & MTD_NO_ERASE)) | |
528 | wr_alignment = slave->mtd.erasesize; | |
529 | ||
6750f61a | 530 | tmp = part_absolute_offset(parent) + slave->offset; |
1eeef2d7 CP |
531 | remainder = do_div(tmp, wr_alignment); |
532 | if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) { | |
7788ba71 | 533 | /* Doesn't start on a boundary of major erase size */ |
b33a2887 AN |
534 | /* FIXME: Let it be writable if it is on a boundary of |
535 | * _minor_ erase size though */ | |
7788ba71 | 536 | slave->mtd.flags &= ~MTD_WRITEABLE; |
1eeef2d7 | 537 | printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase/write block boundary -- force read-only\n", |
7788ba71 AN |
538 | part->name); |
539 | } | |
1eeef2d7 | 540 | |
6750f61a | 541 | tmp = part_absolute_offset(parent) + slave->mtd.size; |
1eeef2d7 CP |
542 | remainder = do_div(tmp, wr_alignment); |
543 | if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) { | |
7788ba71 | 544 | slave->mtd.flags &= ~MTD_WRITEABLE; |
1eeef2d7 | 545 | printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase/write block -- force read-only\n", |
7788ba71 AN |
546 | part->name); |
547 | } | |
548 | ||
adbbc3bc | 549 | mtd_set_ooblayout(&slave->mtd, &part_ooblayout_ops); |
0a9d72b6 RM |
550 | slave->mtd.ecc_step_size = parent->ecc_step_size; |
551 | slave->mtd.ecc_strength = parent->ecc_strength; | |
552 | slave->mtd.bitflip_threshold = parent->bitflip_threshold; | |
d062d4ed | 553 | |
0a9d72b6 | 554 | if (parent->_block_isbad) { |
69423d99 | 555 | uint64_t offs = 0; |
7788ba71 | 556 | |
b33a2887 | 557 | while (offs < slave->mtd.size) { |
0a9d72b6 | 558 | if (mtd_block_isreserved(parent, offs + slave->offset)) |
fdf43a42 | 559 | slave->mtd.ecc_stats.bbtblocks++; |
0a9d72b6 | 560 | else if (mtd_block_isbad(parent, offs + slave->offset)) |
7788ba71 AN |
561 | slave->mtd.ecc_stats.badblocks++; |
562 | offs += slave->mtd.erasesize; | |
563 | } | |
564 | } | |
565 | ||
f636ffb4 | 566 | out_register: |
7788ba71 AN |
567 | return slave; |
568 | } | |
569 | ||
a62c24d7 DE |
570 | static ssize_t mtd_partition_offset_show(struct device *dev, |
571 | struct device_attribute *attr, char *buf) | |
572 | { | |
573 | struct mtd_info *mtd = dev_get_drvdata(dev); | |
2524534d | 574 | struct mtd_part *part = mtd_to_part(mtd); |
a62c24d7 DE |
575 | return snprintf(buf, PAGE_SIZE, "%lld\n", part->offset); |
576 | } | |
577 | ||
578 | static DEVICE_ATTR(offset, S_IRUGO, mtd_partition_offset_show, NULL); | |
579 | ||
580 | static const struct attribute *mtd_partition_attrs[] = { | |
581 | &dev_attr_offset.attr, | |
582 | NULL | |
583 | }; | |
584 | ||
585 | static int mtd_add_partition_attrs(struct mtd_part *new) | |
586 | { | |
587 | int ret = sysfs_create_files(&new->mtd.dev.kobj, mtd_partition_attrs); | |
588 | if (ret) | |
589 | printk(KERN_WARNING | |
590 | "mtd: failed to create partition attrs, err=%d\n", ret); | |
591 | return ret; | |
592 | } | |
593 | ||
0a9d72b6 | 594 | int mtd_add_partition(struct mtd_info *parent, const char *name, |
5daa7b21 RT |
595 | long long offset, long long length) |
596 | { | |
597 | struct mtd_partition part; | |
3a434f66 | 598 | struct mtd_part *new; |
5daa7b21 RT |
599 | int ret = 0; |
600 | ||
601 | /* the direct offset is expected */ | |
602 | if (offset == MTDPART_OFS_APPEND || | |
603 | offset == MTDPART_OFS_NXTBLK) | |
604 | return -EINVAL; | |
605 | ||
606 | if (length == MTDPART_SIZ_FULL) | |
0a9d72b6 | 607 | length = parent->size - offset; |
5daa7b21 RT |
608 | |
609 | if (length <= 0) | |
610 | return -EINVAL; | |
611 | ||
93867233 | 612 | memset(&part, 0, sizeof(part)); |
5daa7b21 RT |
613 | part.name = name; |
614 | part.size = length; | |
615 | part.offset = offset; | |
5daa7b21 | 616 | |
0a9d72b6 | 617 | new = allocate_partition(parent, &part, -1, offset); |
5daa7b21 RT |
618 | if (IS_ERR(new)) |
619 | return PTR_ERR(new); | |
620 | ||
5daa7b21 | 621 | mutex_lock(&mtd_partitions_mutex); |
5daa7b21 RT |
622 | list_add(&new->list, &mtd_partitions); |
623 | mutex_unlock(&mtd_partitions_mutex); | |
624 | ||
2b6f0090 BB |
625 | ret = add_mtd_device(&new->mtd); |
626 | if (ret) | |
627 | goto err_remove_part; | |
5daa7b21 | 628 | |
a62c24d7 DE |
629 | mtd_add_partition_attrs(new); |
630 | ||
2b6f0090 BB |
631 | return 0; |
632 | ||
633 | err_remove_part: | |
634 | mutex_lock(&mtd_partitions_mutex); | |
635 | list_del(&new->list); | |
636 | mutex_unlock(&mtd_partitions_mutex); | |
637 | ||
638 | free_partition(new); | |
2b6f0090 | 639 | |
5daa7b21 | 640 | return ret; |
5daa7b21 RT |
641 | } |
642 | EXPORT_SYMBOL_GPL(mtd_add_partition); | |
643 | ||
08263a9a RM |
644 | /** |
645 | * __mtd_del_partition - delete MTD partition | |
646 | * | |
647 | * @priv: internal MTD struct for partition to be deleted | |
648 | * | |
649 | * This function must be called with the partitions mutex locked. | |
650 | */ | |
651 | static int __mtd_del_partition(struct mtd_part *priv) | |
652 | { | |
97519dc5 | 653 | struct mtd_part *child, *next; |
08263a9a RM |
654 | int err; |
655 | ||
97519dc5 RM |
656 | list_for_each_entry_safe(child, next, &mtd_partitions, list) { |
657 | if (child->parent == &priv->mtd) { | |
658 | err = __mtd_del_partition(child); | |
659 | if (err) | |
660 | return err; | |
661 | } | |
662 | } | |
663 | ||
c5ceaba7 RM |
664 | sysfs_remove_files(&priv->mtd.dev.kobj, mtd_partition_attrs); |
665 | ||
08263a9a RM |
666 | err = del_mtd_device(&priv->mtd); |
667 | if (err) | |
668 | return err; | |
669 | ||
670 | list_del(&priv->list); | |
671 | free_partition(priv); | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
676 | /* | |
677 | * This function unregisters and destroy all slave MTD objects which are | |
97519dc5 | 678 | * attached to the given MTD object. |
08263a9a | 679 | */ |
97519dc5 | 680 | int del_mtd_partitions(struct mtd_info *mtd) |
08263a9a RM |
681 | { |
682 | struct mtd_part *slave, *next; | |
683 | int ret, err = 0; | |
684 | ||
685 | mutex_lock(&mtd_partitions_mutex); | |
686 | list_for_each_entry_safe(slave, next, &mtd_partitions, list) | |
97519dc5 | 687 | if (slave->parent == mtd) { |
08263a9a RM |
688 | ret = __mtd_del_partition(slave); |
689 | if (ret < 0) | |
690 | err = ret; | |
691 | } | |
692 | mutex_unlock(&mtd_partitions_mutex); | |
693 | ||
694 | return err; | |
695 | } | |
696 | ||
97519dc5 | 697 | int mtd_del_partition(struct mtd_info *mtd, int partno) |
5daa7b21 RT |
698 | { |
699 | struct mtd_part *slave, *next; | |
700 | int ret = -EINVAL; | |
701 | ||
702 | mutex_lock(&mtd_partitions_mutex); | |
703 | list_for_each_entry_safe(slave, next, &mtd_partitions, list) | |
97519dc5 | 704 | if ((slave->parent == mtd) && |
5daa7b21 | 705 | (slave->mtd.index == partno)) { |
08263a9a | 706 | ret = __mtd_del_partition(slave); |
5daa7b21 RT |
707 | break; |
708 | } | |
709 | mutex_unlock(&mtd_partitions_mutex); | |
710 | ||
711 | return ret; | |
712 | } | |
713 | EXPORT_SYMBOL_GPL(mtd_del_partition); | |
714 | ||
1da177e4 LT |
715 | /* |
716 | * This function, given a master MTD object and a partition table, creates | |
717 | * and registers slave MTD objects which are bound to the master according to | |
718 | * the partition definitions. | |
1f24b5a8 | 719 | * |
727dc612 DE |
720 | * For historical reasons, this function's caller only registers the master |
721 | * if the MTD_PARTITIONED_MASTER config option is set. | |
1da177e4 LT |
722 | */ |
723 | ||
97894cda | 724 | int add_mtd_partitions(struct mtd_info *master, |
1da177e4 LT |
725 | const struct mtd_partition *parts, |
726 | int nbparts) | |
727 | { | |
728 | struct mtd_part *slave; | |
69423d99 | 729 | uint64_t cur_offset = 0; |
2b6f0090 | 730 | int i, ret; |
1da177e4 | 731 | |
b33a2887 | 732 | printk(KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name); |
1da177e4 LT |
733 | |
734 | for (i = 0; i < nbparts; i++) { | |
5daa7b21 | 735 | slave = allocate_partition(master, parts + i, i, cur_offset); |
e5bae867 | 736 | if (IS_ERR(slave)) { |
2b6f0090 BB |
737 | ret = PTR_ERR(slave); |
738 | goto err_del_partitions; | |
e5bae867 | 739 | } |
5daa7b21 RT |
740 | |
741 | mutex_lock(&mtd_partitions_mutex); | |
742 | list_add(&slave->list, &mtd_partitions); | |
743 | mutex_unlock(&mtd_partitions_mutex); | |
744 | ||
2b6f0090 BB |
745 | ret = add_mtd_device(&slave->mtd); |
746 | if (ret) { | |
747 | mutex_lock(&mtd_partitions_mutex); | |
748 | list_del(&slave->list); | |
749 | mutex_unlock(&mtd_partitions_mutex); | |
750 | ||
751 | free_partition(slave); | |
752 | goto err_del_partitions; | |
753 | } | |
754 | ||
a62c24d7 | 755 | mtd_add_partition_attrs(slave); |
76a83225 RM |
756 | /* Look for subpartitions */ |
757 | parse_mtd_partitions(&slave->mtd, parts[i].types, NULL); | |
5daa7b21 | 758 | |
1da177e4 | 759 | cur_offset = slave->offset + slave->mtd.size; |
1da177e4 LT |
760 | } |
761 | ||
762 | return 0; | |
2b6f0090 BB |
763 | |
764 | err_del_partitions: | |
765 | del_mtd_partitions(master); | |
766 | ||
767 | return ret; | |
1da177e4 | 768 | } |
1da177e4 LT |
769 | |
770 | static DEFINE_SPINLOCK(part_parser_lock); | |
771 | static LIST_HEAD(part_parsers); | |
772 | ||
5531ae48 | 773 | static struct mtd_part_parser *mtd_part_parser_get(const char *name) |
1da177e4 | 774 | { |
71a928c0 | 775 | struct mtd_part_parser *p, *ret = NULL; |
1da177e4 | 776 | |
71a928c0 | 777 | spin_lock(&part_parser_lock); |
1da177e4 | 778 | |
71a928c0 | 779 | list_for_each_entry(p, &part_parsers, list) |
1da177e4 LT |
780 | if (!strcmp(p->name, name) && try_module_get(p->owner)) { |
781 | ret = p; | |
782 | break; | |
783 | } | |
71a928c0 | 784 | |
1da177e4 LT |
785 | spin_unlock(&part_parser_lock); |
786 | ||
787 | return ret; | |
788 | } | |
789 | ||
5531ae48 BN |
790 | static inline void mtd_part_parser_put(const struct mtd_part_parser *p) |
791 | { | |
792 | module_put(p->owner); | |
793 | } | |
953b3bd1 | 794 | |
adc83bf8 BN |
795 | /* |
796 | * Many partition parsers just expected the core to kfree() all their data in | |
797 | * one chunk. Do that by default. | |
798 | */ | |
799 | static void mtd_part_parser_cleanup_default(const struct mtd_partition *pparts, | |
800 | int nr_parts) | |
801 | { | |
802 | kfree(pparts); | |
803 | } | |
804 | ||
b9eab011 | 805 | int __register_mtd_parser(struct mtd_part_parser *p, struct module *owner) |
1da177e4 | 806 | { |
b9eab011 BN |
807 | p->owner = owner; |
808 | ||
adc83bf8 BN |
809 | if (!p->cleanup) |
810 | p->cleanup = &mtd_part_parser_cleanup_default; | |
811 | ||
1da177e4 LT |
812 | spin_lock(&part_parser_lock); |
813 | list_add(&p->list, &part_parsers); | |
814 | spin_unlock(&part_parser_lock); | |
b9eab011 BN |
815 | |
816 | return 0; | |
1da177e4 | 817 | } |
b9eab011 | 818 | EXPORT_SYMBOL_GPL(__register_mtd_parser); |
1da177e4 | 819 | |
cf3b2b1e | 820 | void deregister_mtd_parser(struct mtd_part_parser *p) |
1da177e4 LT |
821 | { |
822 | spin_lock(&part_parser_lock); | |
823 | list_del(&p->list); | |
824 | spin_unlock(&part_parser_lock); | |
1da177e4 | 825 | } |
b33a2887 | 826 | EXPORT_SYMBOL_GPL(deregister_mtd_parser); |
1da177e4 | 827 | |
ad274cec AB |
828 | /* |
829 | * Do not forget to update 'parse_mtd_partitions()' kerneldoc comment if you | |
830 | * are changing this array! | |
831 | */ | |
ccef4dcc | 832 | static const char * const default_mtd_part_types[] = { |
d26c87d6 DES |
833 | "cmdlinepart", |
834 | "ofpart", | |
835 | NULL | |
836 | }; | |
5c4eefbd | 837 | |
76a83225 RM |
838 | /* Check DT only when looking for subpartitions. */ |
839 | static const char * const default_subpartition_types[] = { | |
840 | "ofpart", | |
841 | NULL | |
842 | }; | |
843 | ||
01f9c724 BN |
844 | static int mtd_part_do_parse(struct mtd_part_parser *parser, |
845 | struct mtd_info *master, | |
846 | struct mtd_partitions *pparts, | |
847 | struct mtd_part_parser_data *data) | |
848 | { | |
849 | int ret; | |
850 | ||
851 | ret = (*parser->parse_fn)(master, &pparts->parts, data); | |
852 | pr_debug("%s: parser %s: %i\n", master->name, parser->name, ret); | |
853 | if (ret <= 0) | |
854 | return ret; | |
855 | ||
856 | pr_notice("%d %s partitions found on MTD device %s\n", ret, | |
857 | parser->name, master->name); | |
858 | ||
859 | pparts->nr_parts = ret; | |
860 | pparts->parser = parser; | |
861 | ||
862 | return ret; | |
863 | } | |
864 | ||
5b644aa0 RM |
865 | /** |
866 | * mtd_part_get_compatible_parser - find MTD parser by a compatible string | |
867 | * | |
868 | * @compat: compatible string describing partitions in a device tree | |
869 | * | |
870 | * MTD parsers can specify supported partitions by providing a table of | |
871 | * compatibility strings. This function finds a parser that advertises support | |
872 | * for a passed value of "compatible". | |
873 | */ | |
874 | static struct mtd_part_parser *mtd_part_get_compatible_parser(const char *compat) | |
875 | { | |
876 | struct mtd_part_parser *p, *ret = NULL; | |
877 | ||
878 | spin_lock(&part_parser_lock); | |
879 | ||
880 | list_for_each_entry(p, &part_parsers, list) { | |
881 | const struct of_device_id *matches; | |
882 | ||
883 | matches = p->of_match_table; | |
884 | if (!matches) | |
885 | continue; | |
886 | ||
887 | for (; matches->compatible[0]; matches++) { | |
888 | if (!strcmp(matches->compatible, compat) && | |
889 | try_module_get(p->owner)) { | |
890 | ret = p; | |
891 | break; | |
892 | } | |
893 | } | |
894 | ||
895 | if (ret) | |
896 | break; | |
897 | } | |
898 | ||
899 | spin_unlock(&part_parser_lock); | |
900 | ||
901 | return ret; | |
902 | } | |
903 | ||
904 | static int mtd_part_of_parse(struct mtd_info *master, | |
905 | struct mtd_partitions *pparts) | |
906 | { | |
907 | struct mtd_part_parser *parser; | |
908 | struct device_node *np; | |
909 | struct property *prop; | |
910 | const char *compat; | |
c0faf434 | 911 | const char *fixed = "fixed-partitions"; |
5b644aa0 RM |
912 | int ret, err = 0; |
913 | ||
76a83225 | 914 | np = mtd_get_of_node(master); |
85516a98 MR |
915 | if (mtd_is_partition(master)) |
916 | of_node_get(np); | |
917 | else | |
76a83225 | 918 | np = of_get_child_by_name(np, "partitions"); |
85516a98 | 919 | |
5b644aa0 RM |
920 | of_property_for_each_string(np, "compatible", prop, compat) { |
921 | parser = mtd_part_get_compatible_parser(compat); | |
922 | if (!parser) | |
923 | continue; | |
924 | ret = mtd_part_do_parse(parser, master, pparts, NULL); | |
925 | if (ret > 0) { | |
926 | of_node_put(np); | |
927 | return ret; | |
928 | } | |
929 | mtd_part_parser_put(parser); | |
930 | if (ret < 0 && !err) | |
931 | err = ret; | |
932 | } | |
933 | of_node_put(np); | |
934 | ||
935 | /* | |
c0faf434 | 936 | * For backward compatibility we have to try the "fixed-partitions" |
5b644aa0 RM |
937 | * parser. It supports old DT format with partitions specified as a |
938 | * direct subnodes of a flash device DT node without any compatibility | |
939 | * specified we could match. | |
940 | */ | |
941 | parser = mtd_part_parser_get(fixed); | |
942 | if (!parser && !request_module("%s", fixed)) | |
943 | parser = mtd_part_parser_get(fixed); | |
944 | if (parser) { | |
945 | ret = mtd_part_do_parse(parser, master, pparts, NULL); | |
946 | if (ret > 0) | |
947 | return ret; | |
948 | mtd_part_parser_put(parser); | |
949 | if (ret < 0 && !err) | |
950 | err = ret; | |
951 | } | |
952 | ||
953 | return err; | |
954 | } | |
955 | ||
ad274cec | 956 | /** |
5ac67ce3 RM |
957 | * parse_mtd_partitions - parse and register MTD partitions |
958 | * | |
ad274cec AB |
959 | * @master: the master partition (describes whole MTD device) |
960 | * @types: names of partition parsers to try or %NULL | |
c7975330 | 961 | * @data: MTD partition parser-specific data |
ad274cec | 962 | * |
5ac67ce3 RM |
963 | * This function tries to find & register partitions on MTD device @master. It |
964 | * uses MTD partition parsers, specified in @types. However, if @types is %NULL, | |
965 | * then the default list of parsers is used. The default list contains only the | |
d26c87d6 | 966 | * "cmdlinepart" and "ofpart" parsers ATM. |
c51803dd HS |
967 | * Note: If there are more then one parser in @types, the kernel only takes the |
968 | * partitions parsed out by the first parser. | |
ad274cec AB |
969 | * |
970 | * This function may return: | |
971 | * o a negative error code in case of failure | |
5ac67ce3 | 972 | * o number of found partitions otherwise |
ad274cec | 973 | */ |
26a47346 | 974 | int parse_mtd_partitions(struct mtd_info *master, const char *const *types, |
c7975330 | 975 | struct mtd_part_parser_data *data) |
1da177e4 | 976 | { |
5ac67ce3 | 977 | struct mtd_partitions pparts = { }; |
1da177e4 | 978 | struct mtd_part_parser *parser; |
5a2415b0 | 979 | int ret, err = 0; |
97894cda | 980 | |
5c4eefbd | 981 | if (!types) |
76a83225 RM |
982 | types = mtd_is_partition(master) ? default_subpartition_types : |
983 | default_mtd_part_types; | |
5c4eefbd | 984 | |
5a2415b0 | 985 | for ( ; *types; types++) { |
5b644aa0 RM |
986 | /* |
987 | * ofpart is a special type that means OF partitioning info | |
988 | * should be used. It requires a bit different logic so it is | |
989 | * handled in a separated function. | |
990 | */ | |
991 | if (!strcmp(*types, "ofpart")) { | |
5ac67ce3 | 992 | ret = mtd_part_of_parse(master, &pparts); |
5b644aa0 RM |
993 | } else { |
994 | pr_debug("%s: parsing partitions %s\n", master->name, | |
995 | *types); | |
5531ae48 | 996 | parser = mtd_part_parser_get(*types); |
5b644aa0 RM |
997 | if (!parser && !request_module("%s", *types)) |
998 | parser = mtd_part_parser_get(*types); | |
999 | pr_debug("%s: got parser %s\n", master->name, | |
1000 | parser ? parser->name : NULL); | |
1001 | if (!parser) | |
1002 | continue; | |
5ac67ce3 | 1003 | ret = mtd_part_do_parse(parser, master, &pparts, data); |
5b644aa0 RM |
1004 | if (ret <= 0) |
1005 | mtd_part_parser_put(parser); | |
1006 | } | |
01f9c724 | 1007 | /* Found partitions! */ |
5ac67ce3 RM |
1008 | if (ret > 0) { |
1009 | err = add_mtd_partitions(master, pparts.parts, | |
1010 | pparts.nr_parts); | |
1011 | mtd_part_parser_cleanup(&pparts); | |
1012 | return err ? err : pparts.nr_parts; | |
1013 | } | |
5a2415b0 BN |
1014 | /* |
1015 | * Stash the first error we see; only report it if no parser | |
1016 | * succeeds | |
1017 | */ | |
1018 | if (ret < 0 && !err) | |
1019 | err = ret; | |
1da177e4 | 1020 | } |
5a2415b0 | 1021 | return err; |
1da177e4 | 1022 | } |
5daa7b21 | 1023 | |
adc83bf8 BN |
1024 | void mtd_part_parser_cleanup(struct mtd_partitions *parts) |
1025 | { | |
1026 | const struct mtd_part_parser *parser; | |
1027 | ||
1028 | if (!parts) | |
1029 | return; | |
1030 | ||
1031 | parser = parts->parser; | |
1032 | if (parser) { | |
1033 | if (parser->cleanup) | |
1034 | parser->cleanup(parts->parts, parts->nr_parts); | |
1035 | ||
1036 | mtd_part_parser_put(parser); | |
1037 | } | |
1038 | } | |
1039 | ||
5dee4674 | 1040 | int mtd_is_partition(const struct mtd_info *mtd) |
5daa7b21 RT |
1041 | { |
1042 | struct mtd_part *part; | |
a7e93dcd | 1043 | int ispart = 0; |
5daa7b21 RT |
1044 | |
1045 | mutex_lock(&mtd_partitions_mutex); | |
1046 | list_for_each_entry(part, &mtd_partitions, list) | |
1047 | if (&part->mtd == mtd) { | |
a7e93dcd | 1048 | ispart = 1; |
5daa7b21 RT |
1049 | break; |
1050 | } | |
1051 | mutex_unlock(&mtd_partitions_mutex); | |
1052 | ||
a7e93dcd | 1053 | return ispart; |
5daa7b21 | 1054 | } |
a7e93dcd | 1055 | EXPORT_SYMBOL_GPL(mtd_is_partition); |
62082e56 RG |
1056 | |
1057 | /* Returns the size of the entire flash chip */ | |
1058 | uint64_t mtd_get_device_size(const struct mtd_info *mtd) | |
1059 | { | |
1060 | if (!mtd_is_partition(mtd)) | |
1061 | return mtd->size; | |
1062 | ||
97519dc5 | 1063 | return mtd_get_device_size(mtd_to_part(mtd)->parent); |
62082e56 RG |
1064 | } |
1065 | EXPORT_SYMBOL_GPL(mtd_get_device_size); |