Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Simple MTD partitioning layer | |
3 | * | |
4 | * (C) 2000 Nicolas Pitre <nico@cam.org> | |
5 | * | |
6 | * This code is GPL | |
7 | * | |
1da177e4 LT |
8 | * 02-21-2002 Thomas Gleixner <gleixner@autronix.de> |
9 | * added support for read_oob, write_oob | |
97894cda | 10 | */ |
1da177e4 LT |
11 | |
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> | |
1da177e4 LT |
17 | #include <linux/kmod.h> |
18 | #include <linux/mtd/mtd.h> | |
19 | #include <linux/mtd/partitions.h> | |
20 | #include <linux/mtd/compatmac.h> | |
21 | ||
22 | /* Our partition linked list */ | |
23 | static LIST_HEAD(mtd_partitions); | |
24 | ||
25 | /* Our partition node structure */ | |
26 | struct mtd_part { | |
27 | struct mtd_info mtd; | |
28 | struct mtd_info *master; | |
29 | u_int32_t offset; | |
30 | int index; | |
31 | struct list_head list; | |
32 | int registered; | |
33 | }; | |
34 | ||
35 | /* | |
36 | * Given a pointer to the MTD object in the mtd_part structure, we can retrieve | |
37 | * the pointer to that structure with this macro. | |
38 | */ | |
39 | #define PART(x) ((struct mtd_part *)(x)) | |
40 | ||
97894cda TG |
41 | |
42 | /* | |
1da177e4 LT |
43 | * MTD methods which simply translate the effective address and pass through |
44 | * to the _real_ device. | |
45 | */ | |
46 | ||
b33a2887 AN |
47 | static int part_read(struct mtd_info *mtd, loff_t from, size_t len, |
48 | size_t *retlen, u_char *buf) | |
1da177e4 LT |
49 | { |
50 | struct mtd_part *part = PART(mtd); | |
f1a28c02 TG |
51 | int res; |
52 | ||
1da177e4 LT |
53 | if (from >= mtd->size) |
54 | len = 0; | |
55 | else if (from + len > mtd->size) | |
56 | len = mtd->size - from; | |
b33a2887 | 57 | res = part->master->read(part->master, from + part->offset, |
9223a456 | 58 | len, retlen, buf); |
f1a28c02 TG |
59 | if (unlikely(res)) { |
60 | if (res == -EUCLEAN) | |
61 | mtd->ecc_stats.corrected++; | |
62 | if (res == -EBADMSG) | |
63 | mtd->ecc_stats.failed++; | |
64 | } | |
65 | return res; | |
1da177e4 LT |
66 | } |
67 | ||
b33a2887 AN |
68 | static int part_point(struct mtd_info *mtd, loff_t from, size_t len, |
69 | size_t *retlen, void **virt, resource_size_t *phys) | |
1da177e4 LT |
70 | { |
71 | struct mtd_part *part = PART(mtd); | |
72 | if (from >= mtd->size) | |
73 | len = 0; | |
74 | else if (from + len > mtd->size) | |
75 | len = mtd->size - from; | |
97894cda | 76 | return part->master->point (part->master, from + part->offset, |
a98889f3 | 77 | len, retlen, virt, phys); |
1da177e4 | 78 | } |
9223a456 | 79 | |
a98889f3 | 80 | static void part_unpoint(struct mtd_info *mtd, loff_t from, size_t len) |
1da177e4 LT |
81 | { |
82 | struct mtd_part *part = PART(mtd); | |
83 | ||
a98889f3 | 84 | part->master->unpoint(part->master, from + part->offset, len); |
1da177e4 LT |
85 | } |
86 | ||
8593fbc6 | 87 | static int part_read_oob(struct mtd_info *mtd, loff_t from, |
b33a2887 | 88 | struct mtd_oob_ops *ops) |
1da177e4 LT |
89 | { |
90 | struct mtd_part *part = PART(mtd); | |
f1a28c02 | 91 | int res; |
8593fbc6 | 92 | |
1da177e4 | 93 | if (from >= mtd->size) |
8593fbc6 | 94 | return -EINVAL; |
7014568b | 95 | if (ops->datbuf && from + ops->len > mtd->size) |
8593fbc6 | 96 | return -EINVAL; |
f1a28c02 TG |
97 | res = part->master->read_oob(part->master, from + part->offset, ops); |
98 | ||
99 | if (unlikely(res)) { | |
100 | if (res == -EUCLEAN) | |
101 | mtd->ecc_stats.corrected++; | |
102 | if (res == -EBADMSG) | |
103 | mtd->ecc_stats.failed++; | |
104 | } | |
105 | return res; | |
1da177e4 LT |
106 | } |
107 | ||
b33a2887 AN |
108 | static int part_read_user_prot_reg(struct mtd_info *mtd, loff_t from, |
109 | size_t len, size_t *retlen, u_char *buf) | |
1da177e4 LT |
110 | { |
111 | struct mtd_part *part = PART(mtd); | |
b33a2887 | 112 | return part->master->read_user_prot_reg(part->master, from, |
1da177e4 LT |
113 | len, retlen, buf); |
114 | } | |
115 | ||
b33a2887 AN |
116 | static int part_get_user_prot_info(struct mtd_info *mtd, |
117 | struct otp_info *buf, size_t len) | |
f77814dd NP |
118 | { |
119 | struct mtd_part *part = PART(mtd); | |
b33a2887 | 120 | return part->master->get_user_prot_info(part->master, buf, len); |
f77814dd NP |
121 | } |
122 | ||
b33a2887 AN |
123 | static int part_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, |
124 | size_t len, size_t *retlen, u_char *buf) | |
1da177e4 LT |
125 | { |
126 | struct mtd_part *part = PART(mtd); | |
b33a2887 | 127 | return part->master->read_fact_prot_reg(part->master, from, |
1da177e4 LT |
128 | len, retlen, buf); |
129 | } | |
130 | ||
b33a2887 AN |
131 | static int part_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf, |
132 | size_t len) | |
f77814dd NP |
133 | { |
134 | struct mtd_part *part = PART(mtd); | |
b33a2887 | 135 | return part->master->get_fact_prot_info(part->master, buf, len); |
f77814dd NP |
136 | } |
137 | ||
b33a2887 AN |
138 | static int part_write(struct mtd_info *mtd, loff_t to, size_t len, |
139 | size_t *retlen, const u_char *buf) | |
1da177e4 LT |
140 | { |
141 | struct mtd_part *part = PART(mtd); | |
142 | if (!(mtd->flags & MTD_WRITEABLE)) | |
143 | return -EROFS; | |
144 | if (to >= mtd->size) | |
145 | len = 0; | |
146 | else if (to + len > mtd->size) | |
147 | len = mtd->size - to; | |
b33a2887 | 148 | return part->master->write(part->master, to + part->offset, |
9223a456 | 149 | len, retlen, buf); |
1da177e4 LT |
150 | } |
151 | ||
b33a2887 AN |
152 | static int part_panic_write(struct mtd_info *mtd, loff_t to, size_t len, |
153 | size_t *retlen, const u_char *buf) | |
388bbb09 RP |
154 | { |
155 | struct mtd_part *part = PART(mtd); | |
156 | if (!(mtd->flags & MTD_WRITEABLE)) | |
157 | return -EROFS; | |
158 | if (to >= mtd->size) | |
159 | len = 0; | |
160 | else if (to + len > mtd->size) | |
161 | len = mtd->size - to; | |
b33a2887 | 162 | return part->master->panic_write(part->master, to + part->offset, |
388bbb09 RP |
163 | len, retlen, buf); |
164 | } | |
165 | ||
8593fbc6 | 166 | static int part_write_oob(struct mtd_info *mtd, loff_t to, |
b33a2887 | 167 | struct mtd_oob_ops *ops) |
1da177e4 LT |
168 | { |
169 | struct mtd_part *part = PART(mtd); | |
8593fbc6 | 170 | |
1da177e4 LT |
171 | if (!(mtd->flags & MTD_WRITEABLE)) |
172 | return -EROFS; | |
8593fbc6 | 173 | |
1da177e4 | 174 | if (to >= mtd->size) |
8593fbc6 | 175 | return -EINVAL; |
7014568b | 176 | if (ops->datbuf && to + ops->len > mtd->size) |
8593fbc6 TG |
177 | return -EINVAL; |
178 | return part->master->write_oob(part->master, to + part->offset, ops); | |
1da177e4 LT |
179 | } |
180 | ||
b33a2887 AN |
181 | static int part_write_user_prot_reg(struct mtd_info *mtd, loff_t from, |
182 | size_t len, size_t *retlen, u_char *buf) | |
1da177e4 LT |
183 | { |
184 | struct mtd_part *part = PART(mtd); | |
b33a2887 | 185 | return part->master->write_user_prot_reg(part->master, from, |
1da177e4 LT |
186 | len, retlen, buf); |
187 | } | |
188 | ||
b33a2887 AN |
189 | static int part_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, |
190 | size_t len) | |
f77814dd NP |
191 | { |
192 | struct mtd_part *part = PART(mtd); | |
b33a2887 | 193 | return part->master->lock_user_prot_reg(part->master, from, len); |
f77814dd NP |
194 | } |
195 | ||
b33a2887 AN |
196 | static int part_writev(struct mtd_info *mtd, const struct kvec *vecs, |
197 | unsigned long count, loff_t to, size_t *retlen) | |
1da177e4 LT |
198 | { |
199 | struct mtd_part *part = PART(mtd); | |
200 | if (!(mtd->flags & MTD_WRITEABLE)) | |
201 | return -EROFS; | |
b33a2887 | 202 | return part->master->writev(part->master, vecs, count, |
1da177e4 | 203 | to + part->offset, retlen); |
1da177e4 LT |
204 | } |
205 | ||
b33a2887 | 206 | static int part_erase(struct mtd_info *mtd, struct erase_info *instr) |
1da177e4 LT |
207 | { |
208 | struct mtd_part *part = PART(mtd); | |
209 | int ret; | |
210 | if (!(mtd->flags & MTD_WRITEABLE)) | |
211 | return -EROFS; | |
212 | if (instr->addr >= mtd->size) | |
213 | return -EINVAL; | |
214 | instr->addr += part->offset; | |
215 | ret = part->master->erase(part->master, instr); | |
74641d75 | 216 | if (ret) { |
bb0eb217 | 217 | if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) |
74641d75 AH |
218 | instr->fail_addr -= part->offset; |
219 | instr->addr -= part->offset; | |
220 | } | |
1da177e4 LT |
221 | return ret; |
222 | } | |
223 | ||
224 | void mtd_erase_callback(struct erase_info *instr) | |
225 | { | |
226 | if (instr->mtd->erase == part_erase) { | |
227 | struct mtd_part *part = PART(instr->mtd); | |
228 | ||
bb0eb217 | 229 | if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) |
1da177e4 LT |
230 | instr->fail_addr -= part->offset; |
231 | instr->addr -= part->offset; | |
232 | } | |
233 | if (instr->callback) | |
234 | instr->callback(instr); | |
235 | } | |
236 | EXPORT_SYMBOL_GPL(mtd_erase_callback); | |
237 | ||
b33a2887 | 238 | static int part_lock(struct mtd_info *mtd, loff_t ofs, size_t len) |
1da177e4 LT |
239 | { |
240 | struct mtd_part *part = PART(mtd); | |
97894cda | 241 | if ((len + ofs) > mtd->size) |
1da177e4 LT |
242 | return -EINVAL; |
243 | return part->master->lock(part->master, ofs + part->offset, len); | |
244 | } | |
245 | ||
b33a2887 | 246 | static int part_unlock(struct mtd_info *mtd, loff_t ofs, size_t len) |
1da177e4 LT |
247 | { |
248 | struct mtd_part *part = PART(mtd); | |
97894cda | 249 | if ((len + ofs) > mtd->size) |
1da177e4 LT |
250 | return -EINVAL; |
251 | return part->master->unlock(part->master, ofs + part->offset, len); | |
252 | } | |
253 | ||
254 | static void part_sync(struct mtd_info *mtd) | |
255 | { | |
256 | struct mtd_part *part = PART(mtd); | |
257 | part->master->sync(part->master); | |
258 | } | |
259 | ||
260 | static int part_suspend(struct mtd_info *mtd) | |
261 | { | |
262 | struct mtd_part *part = PART(mtd); | |
263 | return part->master->suspend(part->master); | |
264 | } | |
265 | ||
266 | static void part_resume(struct mtd_info *mtd) | |
267 | { | |
268 | struct mtd_part *part = PART(mtd); | |
269 | part->master->resume(part->master); | |
270 | } | |
271 | ||
b33a2887 | 272 | static int part_block_isbad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 LT |
273 | { |
274 | struct mtd_part *part = PART(mtd); | |
275 | if (ofs >= mtd->size) | |
276 | return -EINVAL; | |
277 | ofs += part->offset; | |
278 | return part->master->block_isbad(part->master, ofs); | |
279 | } | |
280 | ||
b33a2887 | 281 | static int part_block_markbad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 LT |
282 | { |
283 | struct mtd_part *part = PART(mtd); | |
f1a28c02 TG |
284 | int res; |
285 | ||
1da177e4 LT |
286 | if (!(mtd->flags & MTD_WRITEABLE)) |
287 | return -EROFS; | |
288 | if (ofs >= mtd->size) | |
289 | return -EINVAL; | |
290 | ofs += part->offset; | |
f1a28c02 TG |
291 | res = part->master->block_markbad(part->master, ofs); |
292 | if (!res) | |
293 | mtd->ecc_stats.badblocks++; | |
294 | return res; | |
1da177e4 LT |
295 | } |
296 | ||
97894cda TG |
297 | /* |
298 | * This function unregisters and destroy all slave MTD objects which are | |
1da177e4 LT |
299 | * attached to the given master MTD object. |
300 | */ | |
301 | ||
302 | int del_mtd_partitions(struct mtd_info *master) | |
303 | { | |
71a928c0 | 304 | struct mtd_part *slave, *next; |
1da177e4 | 305 | |
71a928c0 | 306 | list_for_each_entry_safe(slave, next, &mtd_partitions, list) |
1da177e4 | 307 | if (slave->master == master) { |
71a928c0 | 308 | list_del(&slave->list); |
b33a2887 | 309 | if (slave->registered) |
1da177e4 LT |
310 | del_mtd_device(&slave->mtd); |
311 | kfree(slave); | |
1da177e4 | 312 | } |
1da177e4 LT |
313 | |
314 | return 0; | |
315 | } | |
b33a2887 | 316 | EXPORT_SYMBOL(del_mtd_partitions); |
1da177e4 | 317 | |
7788ba71 AN |
318 | static struct mtd_part *add_one_partition(struct mtd_info *master, |
319 | const struct mtd_partition *part, int partno, | |
320 | u_int32_t cur_offset) | |
321 | { | |
322 | struct mtd_part *slave; | |
323 | ||
324 | /* allocate the partition structure */ | |
b33a2887 | 325 | slave = kzalloc(sizeof(*slave), GFP_KERNEL); |
7788ba71 | 326 | if (!slave) { |
b33a2887 | 327 | printk(KERN_ERR"memory allocation error while creating partitions for \"%s\"\n", |
7788ba71 AN |
328 | master->name); |
329 | del_mtd_partitions(master); | |
330 | return NULL; | |
331 | } | |
332 | list_add(&slave->list, &mtd_partitions); | |
333 | ||
334 | /* set up the MTD object for this partition */ | |
335 | slave->mtd.type = master->type; | |
336 | slave->mtd.flags = master->flags & ~part->mask_flags; | |
337 | slave->mtd.size = part->size; | |
338 | slave->mtd.writesize = master->writesize; | |
339 | slave->mtd.oobsize = master->oobsize; | |
340 | slave->mtd.oobavail = master->oobavail; | |
341 | slave->mtd.subpage_sft = master->subpage_sft; | |
342 | ||
343 | slave->mtd.name = part->name; | |
344 | slave->mtd.owner = master->owner; | |
345 | ||
346 | slave->mtd.read = part_read; | |
347 | slave->mtd.write = part_write; | |
348 | ||
349 | if (master->panic_write) | |
350 | slave->mtd.panic_write = part_panic_write; | |
351 | ||
b33a2887 | 352 | if (master->point && master->unpoint) { |
7788ba71 AN |
353 | slave->mtd.point = part_point; |
354 | slave->mtd.unpoint = part_unpoint; | |
355 | } | |
356 | ||
357 | if (master->read_oob) | |
358 | slave->mtd.read_oob = part_read_oob; | |
359 | if (master->write_oob) | |
360 | slave->mtd.write_oob = part_write_oob; | |
b33a2887 | 361 | if (master->read_user_prot_reg) |
7788ba71 | 362 | slave->mtd.read_user_prot_reg = part_read_user_prot_reg; |
b33a2887 | 363 | if (master->read_fact_prot_reg) |
7788ba71 | 364 | slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg; |
b33a2887 | 365 | if (master->write_user_prot_reg) |
7788ba71 | 366 | slave->mtd.write_user_prot_reg = part_write_user_prot_reg; |
b33a2887 | 367 | if (master->lock_user_prot_reg) |
7788ba71 | 368 | slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg; |
b33a2887 | 369 | if (master->get_user_prot_info) |
7788ba71 | 370 | slave->mtd.get_user_prot_info = part_get_user_prot_info; |
b33a2887 | 371 | if (master->get_fact_prot_info) |
7788ba71 AN |
372 | slave->mtd.get_fact_prot_info = part_get_fact_prot_info; |
373 | if (master->sync) | |
374 | slave->mtd.sync = part_sync; | |
375 | if (!partno && master->suspend && master->resume) { | |
376 | slave->mtd.suspend = part_suspend; | |
377 | slave->mtd.resume = part_resume; | |
378 | } | |
379 | if (master->writev) | |
380 | slave->mtd.writev = part_writev; | |
381 | if (master->lock) | |
382 | slave->mtd.lock = part_lock; | |
383 | if (master->unlock) | |
384 | slave->mtd.unlock = part_unlock; | |
385 | if (master->block_isbad) | |
386 | slave->mtd.block_isbad = part_block_isbad; | |
387 | if (master->block_markbad) | |
388 | slave->mtd.block_markbad = part_block_markbad; | |
389 | slave->mtd.erase = part_erase; | |
390 | slave->master = master; | |
391 | slave->offset = part->offset; | |
392 | slave->index = partno; | |
393 | ||
394 | if (slave->offset == MTDPART_OFS_APPEND) | |
395 | slave->offset = cur_offset; | |
396 | if (slave->offset == MTDPART_OFS_NXTBLK) { | |
397 | slave->offset = cur_offset; | |
398 | if ((cur_offset % master->erasesize) != 0) { | |
399 | /* Round up to next erasesize */ | |
400 | slave->offset = ((cur_offset / master->erasesize) + 1) * master->erasesize; | |
401 | printk(KERN_NOTICE "Moving partition %d: " | |
402 | "0x%08x -> 0x%08x\n", partno, | |
403 | cur_offset, slave->offset); | |
404 | } | |
405 | } | |
406 | if (slave->mtd.size == MTDPART_SIZ_FULL) | |
407 | slave->mtd.size = master->size - slave->offset; | |
408 | ||
b33a2887 | 409 | printk(KERN_NOTICE "0x%08x-0x%08x : \"%s\"\n", slave->offset, |
7788ba71 AN |
410 | slave->offset + slave->mtd.size, slave->mtd.name); |
411 | ||
412 | /* let's do some sanity checks */ | |
413 | if (slave->offset >= master->size) { | |
f636ffb4 | 414 | /* let's register it anyway to preserve ordering */ |
7788ba71 AN |
415 | slave->offset = 0; |
416 | slave->mtd.size = 0; | |
b33a2887 | 417 | printk(KERN_ERR"mtd: partition \"%s\" is out of reach -- disabled\n", |
7788ba71 | 418 | part->name); |
f636ffb4 | 419 | goto out_register; |
7788ba71 AN |
420 | } |
421 | if (slave->offset + slave->mtd.size > master->size) { | |
422 | slave->mtd.size = master->size - slave->offset; | |
b33a2887 | 423 | printk(KERN_WARNING"mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#x\n", |
7788ba71 AN |
424 | part->name, master->name, slave->mtd.size); |
425 | } | |
b33a2887 | 426 | if (master->numeraseregions > 1) { |
7788ba71 | 427 | /* Deal with variable erase size stuff */ |
6910c136 AN |
428 | int i, max = master->numeraseregions; |
429 | u32 end = slave->offset + slave->mtd.size; | |
7788ba71 AN |
430 | struct mtd_erase_region_info *regions = master->eraseregions; |
431 | ||
6910c136 AN |
432 | /* Find the first erase regions which is part of this |
433 | * partition. */ | |
434 | for (i = 0; i < max && regions[i].offset <= slave->offset; i++) | |
7788ba71 | 435 | ; |
6910c136 AN |
436 | /* The loop searched for the region _behind_ the first one */ |
437 | i--; | |
7788ba71 | 438 | |
6910c136 AN |
439 | /* Pick biggest erasesize */ |
440 | for (; i < max && regions[i].offset < end; i++) { | |
7788ba71 AN |
441 | if (slave->mtd.erasesize < regions[i].erasesize) { |
442 | slave->mtd.erasesize = regions[i].erasesize; | |
443 | } | |
444 | } | |
6910c136 | 445 | BUG_ON(slave->mtd.erasesize == 0); |
7788ba71 AN |
446 | } else { |
447 | /* Single erase size */ | |
448 | slave->mtd.erasesize = master->erasesize; | |
449 | } | |
450 | ||
451 | if ((slave->mtd.flags & MTD_WRITEABLE) && | |
452 | (slave->offset % slave->mtd.erasesize)) { | |
453 | /* Doesn't start on a boundary of major erase size */ | |
b33a2887 AN |
454 | /* FIXME: Let it be writable if it is on a boundary of |
455 | * _minor_ erase size though */ | |
7788ba71 | 456 | slave->mtd.flags &= ~MTD_WRITEABLE; |
b33a2887 | 457 | printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n", |
7788ba71 AN |
458 | part->name); |
459 | } | |
460 | if ((slave->mtd.flags & MTD_WRITEABLE) && | |
461 | (slave->mtd.size % slave->mtd.erasesize)) { | |
462 | slave->mtd.flags &= ~MTD_WRITEABLE; | |
b33a2887 | 463 | printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n", |
7788ba71 AN |
464 | part->name); |
465 | } | |
466 | ||
467 | slave->mtd.ecclayout = master->ecclayout; | |
468 | if (master->block_isbad) { | |
469 | uint32_t offs = 0; | |
470 | ||
b33a2887 | 471 | while (offs < slave->mtd.size) { |
7788ba71 AN |
472 | if (master->block_isbad(master, |
473 | offs + slave->offset)) | |
474 | slave->mtd.ecc_stats.badblocks++; | |
475 | offs += slave->mtd.erasesize; | |
476 | } | |
477 | } | |
478 | ||
f636ffb4 | 479 | out_register: |
b33a2887 AN |
480 | if (part->mtdp) { |
481 | /* store the object pointer (caller may or may not register it*/ | |
7788ba71 AN |
482 | *part->mtdp = &slave->mtd; |
483 | slave->registered = 0; | |
484 | } else { | |
485 | /* register our partition */ | |
486 | add_mtd_device(&slave->mtd); | |
487 | slave->registered = 1; | |
488 | } | |
489 | return slave; | |
490 | } | |
491 | ||
1da177e4 LT |
492 | /* |
493 | * This function, given a master MTD object and a partition table, creates | |
494 | * and registers slave MTD objects which are bound to the master according to | |
495 | * the partition definitions. | |
496 | * (Q: should we register the master MTD object as well?) | |
497 | */ | |
498 | ||
97894cda | 499 | int add_mtd_partitions(struct mtd_info *master, |
1da177e4 LT |
500 | const struct mtd_partition *parts, |
501 | int nbparts) | |
502 | { | |
503 | struct mtd_part *slave; | |
504 | u_int32_t cur_offset = 0; | |
505 | int i; | |
506 | ||
b33a2887 | 507 | printk(KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name); |
1da177e4 LT |
508 | |
509 | for (i = 0; i < nbparts; i++) { | |
7788ba71 AN |
510 | slave = add_one_partition(master, parts + i, i, cur_offset); |
511 | if (!slave) | |
1da177e4 | 512 | return -ENOMEM; |
1da177e4 | 513 | cur_offset = slave->offset + slave->mtd.size; |
1da177e4 LT |
514 | } |
515 | ||
516 | return 0; | |
517 | } | |
1da177e4 | 518 | EXPORT_SYMBOL(add_mtd_partitions); |
1da177e4 LT |
519 | |
520 | static DEFINE_SPINLOCK(part_parser_lock); | |
521 | static LIST_HEAD(part_parsers); | |
522 | ||
523 | static struct mtd_part_parser *get_partition_parser(const char *name) | |
524 | { | |
71a928c0 | 525 | struct mtd_part_parser *p, *ret = NULL; |
1da177e4 | 526 | |
71a928c0 | 527 | spin_lock(&part_parser_lock); |
1da177e4 | 528 | |
71a928c0 | 529 | list_for_each_entry(p, &part_parsers, list) |
1da177e4 LT |
530 | if (!strcmp(p->name, name) && try_module_get(p->owner)) { |
531 | ret = p; | |
532 | break; | |
533 | } | |
71a928c0 | 534 | |
1da177e4 LT |
535 | spin_unlock(&part_parser_lock); |
536 | ||
537 | return ret; | |
538 | } | |
539 | ||
540 | int register_mtd_parser(struct mtd_part_parser *p) | |
541 | { | |
542 | spin_lock(&part_parser_lock); | |
543 | list_add(&p->list, &part_parsers); | |
544 | spin_unlock(&part_parser_lock); | |
545 | ||
546 | return 0; | |
547 | } | |
b33a2887 | 548 | EXPORT_SYMBOL_GPL(register_mtd_parser); |
1da177e4 LT |
549 | |
550 | int deregister_mtd_parser(struct mtd_part_parser *p) | |
551 | { | |
552 | spin_lock(&part_parser_lock); | |
553 | list_del(&p->list); | |
554 | spin_unlock(&part_parser_lock); | |
555 | return 0; | |
556 | } | |
b33a2887 | 557 | EXPORT_SYMBOL_GPL(deregister_mtd_parser); |
1da177e4 | 558 | |
97894cda | 559 | int parse_mtd_partitions(struct mtd_info *master, const char **types, |
1da177e4 LT |
560 | struct mtd_partition **pparts, unsigned long origin) |
561 | { | |
562 | struct mtd_part_parser *parser; | |
563 | int ret = 0; | |
97894cda | 564 | |
1da177e4 LT |
565 | for ( ; ret <= 0 && *types; types++) { |
566 | parser = get_partition_parser(*types); | |
1da177e4 LT |
567 | if (!parser && !request_module("%s", *types)) |
568 | parser = get_partition_parser(*types); | |
1da177e4 LT |
569 | if (!parser) { |
570 | printk(KERN_NOTICE "%s partition parsing not available\n", | |
571 | *types); | |
572 | continue; | |
573 | } | |
574 | ret = (*parser->parse_fn)(master, pparts, origin); | |
575 | if (ret > 0) { | |
97894cda | 576 | printk(KERN_NOTICE "%d %s partitions found on MTD device %s\n", |
1da177e4 LT |
577 | ret, parser->name, master->name); |
578 | } | |
579 | put_partition_parser(parser); | |
580 | } | |
581 | return ret; | |
582 | } | |
1da177e4 | 583 | EXPORT_SYMBOL_GPL(parse_mtd_partitions); |