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; | |
69423d99 | 29 | uint64_t offset; |
1da177e4 LT |
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); | |
d8877f19 | 51 | struct mtd_ecc_stats stats; |
f1a28c02 TG |
52 | int res; |
53 | ||
d8877f19 YK |
54 | stats = part->master->ecc_stats; |
55 | ||
1da177e4 LT |
56 | if (from >= mtd->size) |
57 | len = 0; | |
58 | else if (from + len > mtd->size) | |
59 | len = mtd->size - from; | |
b33a2887 | 60 | res = part->master->read(part->master, from + part->offset, |
9223a456 | 61 | len, retlen, buf); |
f1a28c02 TG |
62 | if (unlikely(res)) { |
63 | if (res == -EUCLEAN) | |
d8877f19 | 64 | mtd->ecc_stats.corrected += part->master->ecc_stats.corrected - stats.corrected; |
f1a28c02 | 65 | if (res == -EBADMSG) |
d8877f19 | 66 | mtd->ecc_stats.failed += part->master->ecc_stats.failed - stats.failed; |
f1a28c02 TG |
67 | } |
68 | return res; | |
1da177e4 LT |
69 | } |
70 | ||
b33a2887 AN |
71 | static int part_point(struct mtd_info *mtd, loff_t from, size_t len, |
72 | size_t *retlen, void **virt, resource_size_t *phys) | |
1da177e4 LT |
73 | { |
74 | struct mtd_part *part = PART(mtd); | |
75 | if (from >= mtd->size) | |
76 | len = 0; | |
77 | else if (from + len > mtd->size) | |
78 | len = mtd->size - from; | |
97894cda | 79 | return part->master->point (part->master, from + part->offset, |
a98889f3 | 80 | len, retlen, virt, phys); |
1da177e4 | 81 | } |
9223a456 | 82 | |
a98889f3 | 83 | static void part_unpoint(struct mtd_info *mtd, loff_t from, size_t len) |
1da177e4 LT |
84 | { |
85 | struct mtd_part *part = PART(mtd); | |
86 | ||
a98889f3 | 87 | part->master->unpoint(part->master, from + part->offset, len); |
1da177e4 LT |
88 | } |
89 | ||
402d3265 DH |
90 | static unsigned long part_get_unmapped_area(struct mtd_info *mtd, |
91 | unsigned long len, | |
92 | unsigned long offset, | |
93 | unsigned long flags) | |
94 | { | |
95 | struct mtd_part *part = PART(mtd); | |
96 | ||
97 | offset += part->offset; | |
98 | return part->master->get_unmapped_area(part->master, len, offset, | |
99 | flags); | |
100 | } | |
101 | ||
8593fbc6 | 102 | static int part_read_oob(struct mtd_info *mtd, loff_t from, |
b33a2887 | 103 | struct mtd_oob_ops *ops) |
1da177e4 LT |
104 | { |
105 | struct mtd_part *part = PART(mtd); | |
f1a28c02 | 106 | int res; |
8593fbc6 | 107 | |
1da177e4 | 108 | if (from >= mtd->size) |
8593fbc6 | 109 | return -EINVAL; |
7014568b | 110 | if (ops->datbuf && from + ops->len > mtd->size) |
8593fbc6 | 111 | return -EINVAL; |
f1a28c02 TG |
112 | res = part->master->read_oob(part->master, from + part->offset, ops); |
113 | ||
114 | if (unlikely(res)) { | |
115 | if (res == -EUCLEAN) | |
116 | mtd->ecc_stats.corrected++; | |
117 | if (res == -EBADMSG) | |
118 | mtd->ecc_stats.failed++; | |
119 | } | |
120 | return res; | |
1da177e4 LT |
121 | } |
122 | ||
b33a2887 AN |
123 | static int part_read_user_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_user_prot_reg(part->master, from, |
1da177e4 LT |
128 | len, retlen, buf); |
129 | } | |
130 | ||
b33a2887 AN |
131 | static int part_get_user_prot_info(struct mtd_info *mtd, |
132 | struct otp_info *buf, size_t len) | |
f77814dd NP |
133 | { |
134 | struct mtd_part *part = PART(mtd); | |
b33a2887 | 135 | return part->master->get_user_prot_info(part->master, buf, len); |
f77814dd NP |
136 | } |
137 | ||
b33a2887 AN |
138 | static int part_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, |
139 | size_t len, size_t *retlen, u_char *buf) | |
1da177e4 LT |
140 | { |
141 | struct mtd_part *part = PART(mtd); | |
b33a2887 | 142 | return part->master->read_fact_prot_reg(part->master, from, |
1da177e4 LT |
143 | len, retlen, buf); |
144 | } | |
145 | ||
b33a2887 AN |
146 | static int part_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf, |
147 | size_t len) | |
f77814dd NP |
148 | { |
149 | struct mtd_part *part = PART(mtd); | |
b33a2887 | 150 | return part->master->get_fact_prot_info(part->master, buf, len); |
f77814dd NP |
151 | } |
152 | ||
b33a2887 AN |
153 | static int part_write(struct mtd_info *mtd, loff_t to, size_t len, |
154 | size_t *retlen, const u_char *buf) | |
1da177e4 LT |
155 | { |
156 | struct mtd_part *part = PART(mtd); | |
157 | if (!(mtd->flags & MTD_WRITEABLE)) | |
158 | return -EROFS; | |
159 | if (to >= mtd->size) | |
160 | len = 0; | |
161 | else if (to + len > mtd->size) | |
162 | len = mtd->size - to; | |
b33a2887 | 163 | return part->master->write(part->master, to + part->offset, |
9223a456 | 164 | len, retlen, buf); |
1da177e4 LT |
165 | } |
166 | ||
b33a2887 AN |
167 | static int part_panic_write(struct mtd_info *mtd, loff_t to, size_t len, |
168 | size_t *retlen, const u_char *buf) | |
388bbb09 RP |
169 | { |
170 | struct mtd_part *part = PART(mtd); | |
171 | if (!(mtd->flags & MTD_WRITEABLE)) | |
172 | return -EROFS; | |
173 | if (to >= mtd->size) | |
174 | len = 0; | |
175 | else if (to + len > mtd->size) | |
176 | len = mtd->size - to; | |
b33a2887 | 177 | return part->master->panic_write(part->master, to + part->offset, |
388bbb09 RP |
178 | len, retlen, buf); |
179 | } | |
180 | ||
8593fbc6 | 181 | static int part_write_oob(struct mtd_info *mtd, loff_t to, |
b33a2887 | 182 | struct mtd_oob_ops *ops) |
1da177e4 LT |
183 | { |
184 | struct mtd_part *part = PART(mtd); | |
8593fbc6 | 185 | |
1da177e4 LT |
186 | if (!(mtd->flags & MTD_WRITEABLE)) |
187 | return -EROFS; | |
8593fbc6 | 188 | |
1da177e4 | 189 | if (to >= mtd->size) |
8593fbc6 | 190 | return -EINVAL; |
7014568b | 191 | if (ops->datbuf && to + ops->len > mtd->size) |
8593fbc6 TG |
192 | return -EINVAL; |
193 | return part->master->write_oob(part->master, to + part->offset, ops); | |
1da177e4 LT |
194 | } |
195 | ||
b33a2887 AN |
196 | static int part_write_user_prot_reg(struct mtd_info *mtd, loff_t from, |
197 | size_t len, size_t *retlen, u_char *buf) | |
1da177e4 LT |
198 | { |
199 | struct mtd_part *part = PART(mtd); | |
b33a2887 | 200 | return part->master->write_user_prot_reg(part->master, from, |
1da177e4 LT |
201 | len, retlen, buf); |
202 | } | |
203 | ||
b33a2887 AN |
204 | static int part_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, |
205 | size_t len) | |
f77814dd NP |
206 | { |
207 | struct mtd_part *part = PART(mtd); | |
b33a2887 | 208 | return part->master->lock_user_prot_reg(part->master, from, len); |
f77814dd NP |
209 | } |
210 | ||
b33a2887 AN |
211 | static int part_writev(struct mtd_info *mtd, const struct kvec *vecs, |
212 | unsigned long count, loff_t to, size_t *retlen) | |
1da177e4 LT |
213 | { |
214 | struct mtd_part *part = PART(mtd); | |
215 | if (!(mtd->flags & MTD_WRITEABLE)) | |
216 | return -EROFS; | |
b33a2887 | 217 | return part->master->writev(part->master, vecs, count, |
1da177e4 | 218 | to + part->offset, retlen); |
1da177e4 LT |
219 | } |
220 | ||
b33a2887 | 221 | static int part_erase(struct mtd_info *mtd, struct erase_info *instr) |
1da177e4 LT |
222 | { |
223 | struct mtd_part *part = PART(mtd); | |
224 | int ret; | |
225 | if (!(mtd->flags & MTD_WRITEABLE)) | |
226 | return -EROFS; | |
227 | if (instr->addr >= mtd->size) | |
228 | return -EINVAL; | |
229 | instr->addr += part->offset; | |
230 | ret = part->master->erase(part->master, instr); | |
74641d75 | 231 | if (ret) { |
bb0eb217 | 232 | if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) |
74641d75 AH |
233 | instr->fail_addr -= part->offset; |
234 | instr->addr -= part->offset; | |
235 | } | |
1da177e4 LT |
236 | return ret; |
237 | } | |
238 | ||
239 | void mtd_erase_callback(struct erase_info *instr) | |
240 | { | |
241 | if (instr->mtd->erase == part_erase) { | |
242 | struct mtd_part *part = PART(instr->mtd); | |
243 | ||
bb0eb217 | 244 | if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN) |
1da177e4 LT |
245 | instr->fail_addr -= part->offset; |
246 | instr->addr -= part->offset; | |
247 | } | |
248 | if (instr->callback) | |
249 | instr->callback(instr); | |
250 | } | |
251 | EXPORT_SYMBOL_GPL(mtd_erase_callback); | |
252 | ||
69423d99 | 253 | static int part_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
1da177e4 LT |
254 | { |
255 | struct mtd_part *part = PART(mtd); | |
97894cda | 256 | if ((len + ofs) > mtd->size) |
1da177e4 LT |
257 | return -EINVAL; |
258 | return part->master->lock(part->master, ofs + part->offset, len); | |
259 | } | |
260 | ||
69423d99 | 261 | static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
1da177e4 LT |
262 | { |
263 | struct mtd_part *part = PART(mtd); | |
97894cda | 264 | if ((len + ofs) > mtd->size) |
1da177e4 LT |
265 | return -EINVAL; |
266 | return part->master->unlock(part->master, ofs + part->offset, len); | |
267 | } | |
268 | ||
269 | static void part_sync(struct mtd_info *mtd) | |
270 | { | |
271 | struct mtd_part *part = PART(mtd); | |
272 | part->master->sync(part->master); | |
273 | } | |
274 | ||
275 | static int part_suspend(struct mtd_info *mtd) | |
276 | { | |
277 | struct mtd_part *part = PART(mtd); | |
278 | return part->master->suspend(part->master); | |
279 | } | |
280 | ||
281 | static void part_resume(struct mtd_info *mtd) | |
282 | { | |
283 | struct mtd_part *part = PART(mtd); | |
284 | part->master->resume(part->master); | |
285 | } | |
286 | ||
b33a2887 | 287 | static int part_block_isbad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 LT |
288 | { |
289 | struct mtd_part *part = PART(mtd); | |
290 | if (ofs >= mtd->size) | |
291 | return -EINVAL; | |
292 | ofs += part->offset; | |
293 | return part->master->block_isbad(part->master, ofs); | |
294 | } | |
295 | ||
b33a2887 | 296 | static int part_block_markbad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 LT |
297 | { |
298 | struct mtd_part *part = PART(mtd); | |
f1a28c02 TG |
299 | int res; |
300 | ||
1da177e4 LT |
301 | if (!(mtd->flags & MTD_WRITEABLE)) |
302 | return -EROFS; | |
303 | if (ofs >= mtd->size) | |
304 | return -EINVAL; | |
305 | ofs += part->offset; | |
f1a28c02 TG |
306 | res = part->master->block_markbad(part->master, ofs); |
307 | if (!res) | |
308 | mtd->ecc_stats.badblocks++; | |
309 | return res; | |
1da177e4 LT |
310 | } |
311 | ||
97894cda TG |
312 | /* |
313 | * This function unregisters and destroy all slave MTD objects which are | |
1da177e4 LT |
314 | * attached to the given master MTD object. |
315 | */ | |
316 | ||
317 | int del_mtd_partitions(struct mtd_info *master) | |
318 | { | |
71a928c0 | 319 | struct mtd_part *slave, *next; |
1da177e4 | 320 | |
71a928c0 | 321 | list_for_each_entry_safe(slave, next, &mtd_partitions, list) |
1da177e4 | 322 | if (slave->master == master) { |
71a928c0 | 323 | list_del(&slave->list); |
b33a2887 | 324 | if (slave->registered) |
1da177e4 LT |
325 | del_mtd_device(&slave->mtd); |
326 | kfree(slave); | |
1da177e4 | 327 | } |
1da177e4 LT |
328 | |
329 | return 0; | |
330 | } | |
b33a2887 | 331 | EXPORT_SYMBOL(del_mtd_partitions); |
1da177e4 | 332 | |
7788ba71 AN |
333 | static struct mtd_part *add_one_partition(struct mtd_info *master, |
334 | const struct mtd_partition *part, int partno, | |
69423d99 | 335 | uint64_t cur_offset) |
7788ba71 AN |
336 | { |
337 | struct mtd_part *slave; | |
338 | ||
339 | /* allocate the partition structure */ | |
b33a2887 | 340 | slave = kzalloc(sizeof(*slave), GFP_KERNEL); |
7788ba71 | 341 | if (!slave) { |
b33a2887 | 342 | printk(KERN_ERR"memory allocation error while creating partitions for \"%s\"\n", |
7788ba71 AN |
343 | master->name); |
344 | del_mtd_partitions(master); | |
345 | return NULL; | |
346 | } | |
347 | list_add(&slave->list, &mtd_partitions); | |
348 | ||
349 | /* set up the MTD object for this partition */ | |
350 | slave->mtd.type = master->type; | |
351 | slave->mtd.flags = master->flags & ~part->mask_flags; | |
352 | slave->mtd.size = part->size; | |
353 | slave->mtd.writesize = master->writesize; | |
354 | slave->mtd.oobsize = master->oobsize; | |
355 | slave->mtd.oobavail = master->oobavail; | |
356 | slave->mtd.subpage_sft = master->subpage_sft; | |
357 | ||
358 | slave->mtd.name = part->name; | |
359 | slave->mtd.owner = master->owner; | |
402d3265 | 360 | slave->mtd.backing_dev_info = master->backing_dev_info; |
7788ba71 | 361 | |
1f24b5a8 DB |
362 | /* NOTE: we don't arrange MTDs as a tree; it'd be error-prone |
363 | * to have the same data be in two different partitions. | |
364 | */ | |
365 | slave->mtd.dev.parent = master->dev.parent; | |
366 | ||
7788ba71 AN |
367 | slave->mtd.read = part_read; |
368 | slave->mtd.write = part_write; | |
369 | ||
370 | if (master->panic_write) | |
371 | slave->mtd.panic_write = part_panic_write; | |
372 | ||
b33a2887 | 373 | if (master->point && master->unpoint) { |
7788ba71 AN |
374 | slave->mtd.point = part_point; |
375 | slave->mtd.unpoint = part_unpoint; | |
376 | } | |
377 | ||
402d3265 DH |
378 | if (master->get_unmapped_area) |
379 | slave->mtd.get_unmapped_area = part_get_unmapped_area; | |
7788ba71 AN |
380 | if (master->read_oob) |
381 | slave->mtd.read_oob = part_read_oob; | |
382 | if (master->write_oob) | |
383 | slave->mtd.write_oob = part_write_oob; | |
b33a2887 | 384 | if (master->read_user_prot_reg) |
7788ba71 | 385 | slave->mtd.read_user_prot_reg = part_read_user_prot_reg; |
b33a2887 | 386 | if (master->read_fact_prot_reg) |
7788ba71 | 387 | slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg; |
b33a2887 | 388 | if (master->write_user_prot_reg) |
7788ba71 | 389 | slave->mtd.write_user_prot_reg = part_write_user_prot_reg; |
b33a2887 | 390 | if (master->lock_user_prot_reg) |
7788ba71 | 391 | slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg; |
b33a2887 | 392 | if (master->get_user_prot_info) |
7788ba71 | 393 | slave->mtd.get_user_prot_info = part_get_user_prot_info; |
b33a2887 | 394 | if (master->get_fact_prot_info) |
7788ba71 AN |
395 | slave->mtd.get_fact_prot_info = part_get_fact_prot_info; |
396 | if (master->sync) | |
397 | slave->mtd.sync = part_sync; | |
398 | if (!partno && master->suspend && master->resume) { | |
399 | slave->mtd.suspend = part_suspend; | |
400 | slave->mtd.resume = part_resume; | |
401 | } | |
402 | if (master->writev) | |
403 | slave->mtd.writev = part_writev; | |
404 | if (master->lock) | |
405 | slave->mtd.lock = part_lock; | |
406 | if (master->unlock) | |
407 | slave->mtd.unlock = part_unlock; | |
408 | if (master->block_isbad) | |
409 | slave->mtd.block_isbad = part_block_isbad; | |
410 | if (master->block_markbad) | |
411 | slave->mtd.block_markbad = part_block_markbad; | |
412 | slave->mtd.erase = part_erase; | |
413 | slave->master = master; | |
414 | slave->offset = part->offset; | |
415 | slave->index = partno; | |
416 | ||
417 | if (slave->offset == MTDPART_OFS_APPEND) | |
418 | slave->offset = cur_offset; | |
419 | if (slave->offset == MTDPART_OFS_NXTBLK) { | |
420 | slave->offset = cur_offset; | |
69423d99 | 421 | if (mtd_mod_by_eb(cur_offset, master) != 0) { |
7788ba71 | 422 | /* Round up to next erasesize */ |
69423d99 | 423 | slave->offset = (mtd_div_by_eb(cur_offset, master) + 1) * master->erasesize; |
7788ba71 | 424 | printk(KERN_NOTICE "Moving partition %d: " |
69423d99 AH |
425 | "0x%012llx -> 0x%012llx\n", partno, |
426 | (unsigned long long)cur_offset, (unsigned long long)slave->offset); | |
7788ba71 AN |
427 | } |
428 | } | |
429 | if (slave->mtd.size == MTDPART_SIZ_FULL) | |
430 | slave->mtd.size = master->size - slave->offset; | |
431 | ||
69423d99 AH |
432 | printk(KERN_NOTICE "0x%012llx-0x%012llx : \"%s\"\n", (unsigned long long)slave->offset, |
433 | (unsigned long long)(slave->offset + slave->mtd.size), slave->mtd.name); | |
7788ba71 AN |
434 | |
435 | /* let's do some sanity checks */ | |
436 | if (slave->offset >= master->size) { | |
f636ffb4 | 437 | /* let's register it anyway to preserve ordering */ |
7788ba71 AN |
438 | slave->offset = 0; |
439 | slave->mtd.size = 0; | |
b33a2887 | 440 | printk(KERN_ERR"mtd: partition \"%s\" is out of reach -- disabled\n", |
7788ba71 | 441 | part->name); |
f636ffb4 | 442 | goto out_register; |
7788ba71 AN |
443 | } |
444 | if (slave->offset + slave->mtd.size > master->size) { | |
445 | slave->mtd.size = master->size - slave->offset; | |
69423d99 AH |
446 | printk(KERN_WARNING"mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#llx\n", |
447 | part->name, master->name, (unsigned long long)slave->mtd.size); | |
7788ba71 | 448 | } |
b33a2887 | 449 | if (master->numeraseregions > 1) { |
7788ba71 | 450 | /* Deal with variable erase size stuff */ |
6910c136 | 451 | int i, max = master->numeraseregions; |
69423d99 | 452 | u64 end = slave->offset + slave->mtd.size; |
7788ba71 AN |
453 | struct mtd_erase_region_info *regions = master->eraseregions; |
454 | ||
6910c136 AN |
455 | /* Find the first erase regions which is part of this |
456 | * partition. */ | |
457 | for (i = 0; i < max && regions[i].offset <= slave->offset; i++) | |
7788ba71 | 458 | ; |
6910c136 AN |
459 | /* The loop searched for the region _behind_ the first one */ |
460 | i--; | |
7788ba71 | 461 | |
6910c136 AN |
462 | /* Pick biggest erasesize */ |
463 | for (; i < max && regions[i].offset < end; i++) { | |
7788ba71 AN |
464 | if (slave->mtd.erasesize < regions[i].erasesize) { |
465 | slave->mtd.erasesize = regions[i].erasesize; | |
466 | } | |
467 | } | |
6910c136 | 468 | BUG_ON(slave->mtd.erasesize == 0); |
7788ba71 AN |
469 | } else { |
470 | /* Single erase size */ | |
471 | slave->mtd.erasesize = master->erasesize; | |
472 | } | |
473 | ||
474 | if ((slave->mtd.flags & MTD_WRITEABLE) && | |
69423d99 | 475 | mtd_mod_by_eb(slave->offset, &slave->mtd)) { |
7788ba71 | 476 | /* Doesn't start on a boundary of major erase size */ |
b33a2887 AN |
477 | /* FIXME: Let it be writable if it is on a boundary of |
478 | * _minor_ erase size though */ | |
7788ba71 | 479 | slave->mtd.flags &= ~MTD_WRITEABLE; |
b33a2887 | 480 | printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n", |
7788ba71 AN |
481 | part->name); |
482 | } | |
483 | if ((slave->mtd.flags & MTD_WRITEABLE) && | |
69423d99 | 484 | mtd_mod_by_eb(slave->mtd.size, &slave->mtd)) { |
7788ba71 | 485 | slave->mtd.flags &= ~MTD_WRITEABLE; |
b33a2887 | 486 | printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n", |
7788ba71 AN |
487 | part->name); |
488 | } | |
489 | ||
490 | slave->mtd.ecclayout = master->ecclayout; | |
491 | if (master->block_isbad) { | |
69423d99 | 492 | uint64_t offs = 0; |
7788ba71 | 493 | |
b33a2887 | 494 | while (offs < slave->mtd.size) { |
7788ba71 AN |
495 | if (master->block_isbad(master, |
496 | offs + slave->offset)) | |
497 | slave->mtd.ecc_stats.badblocks++; | |
498 | offs += slave->mtd.erasesize; | |
499 | } | |
500 | } | |
501 | ||
f636ffb4 | 502 | out_register: |
b33a2887 AN |
503 | if (part->mtdp) { |
504 | /* store the object pointer (caller may or may not register it*/ | |
7788ba71 AN |
505 | *part->mtdp = &slave->mtd; |
506 | slave->registered = 0; | |
507 | } else { | |
508 | /* register our partition */ | |
509 | add_mtd_device(&slave->mtd); | |
510 | slave->registered = 1; | |
511 | } | |
512 | return slave; | |
513 | } | |
514 | ||
1da177e4 LT |
515 | /* |
516 | * This function, given a master MTD object and a partition table, creates | |
517 | * and registers slave MTD objects which are bound to the master according to | |
518 | * the partition definitions. | |
1f24b5a8 DB |
519 | * |
520 | * We don't register the master, or expect the caller to have done so, | |
521 | * for reasons of data integrity. | |
1da177e4 LT |
522 | */ |
523 | ||
97894cda | 524 | int add_mtd_partitions(struct mtd_info *master, |
1da177e4 LT |
525 | const struct mtd_partition *parts, |
526 | int nbparts) | |
527 | { | |
528 | struct mtd_part *slave; | |
69423d99 | 529 | uint64_t cur_offset = 0; |
1da177e4 LT |
530 | int i; |
531 | ||
b33a2887 | 532 | printk(KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name); |
1da177e4 LT |
533 | |
534 | for (i = 0; i < nbparts; i++) { | |
7788ba71 AN |
535 | slave = add_one_partition(master, parts + i, i, cur_offset); |
536 | if (!slave) | |
1da177e4 | 537 | return -ENOMEM; |
1da177e4 | 538 | cur_offset = slave->offset + slave->mtd.size; |
1da177e4 LT |
539 | } |
540 | ||
541 | return 0; | |
542 | } | |
1da177e4 | 543 | EXPORT_SYMBOL(add_mtd_partitions); |
1da177e4 LT |
544 | |
545 | static DEFINE_SPINLOCK(part_parser_lock); | |
546 | static LIST_HEAD(part_parsers); | |
547 | ||
548 | static struct mtd_part_parser *get_partition_parser(const char *name) | |
549 | { | |
71a928c0 | 550 | struct mtd_part_parser *p, *ret = NULL; |
1da177e4 | 551 | |
71a928c0 | 552 | spin_lock(&part_parser_lock); |
1da177e4 | 553 | |
71a928c0 | 554 | list_for_each_entry(p, &part_parsers, list) |
1da177e4 LT |
555 | if (!strcmp(p->name, name) && try_module_get(p->owner)) { |
556 | ret = p; | |
557 | break; | |
558 | } | |
71a928c0 | 559 | |
1da177e4 LT |
560 | spin_unlock(&part_parser_lock); |
561 | ||
562 | return ret; | |
563 | } | |
564 | ||
565 | int register_mtd_parser(struct mtd_part_parser *p) | |
566 | { | |
567 | spin_lock(&part_parser_lock); | |
568 | list_add(&p->list, &part_parsers); | |
569 | spin_unlock(&part_parser_lock); | |
570 | ||
571 | return 0; | |
572 | } | |
b33a2887 | 573 | EXPORT_SYMBOL_GPL(register_mtd_parser); |
1da177e4 LT |
574 | |
575 | int deregister_mtd_parser(struct mtd_part_parser *p) | |
576 | { | |
577 | spin_lock(&part_parser_lock); | |
578 | list_del(&p->list); | |
579 | spin_unlock(&part_parser_lock); | |
580 | return 0; | |
581 | } | |
b33a2887 | 582 | EXPORT_SYMBOL_GPL(deregister_mtd_parser); |
1da177e4 | 583 | |
97894cda | 584 | int parse_mtd_partitions(struct mtd_info *master, const char **types, |
1da177e4 LT |
585 | struct mtd_partition **pparts, unsigned long origin) |
586 | { | |
587 | struct mtd_part_parser *parser; | |
588 | int ret = 0; | |
97894cda | 589 | |
1da177e4 LT |
590 | for ( ; ret <= 0 && *types; types++) { |
591 | parser = get_partition_parser(*types); | |
1da177e4 LT |
592 | if (!parser && !request_module("%s", *types)) |
593 | parser = get_partition_parser(*types); | |
1da177e4 LT |
594 | if (!parser) { |
595 | printk(KERN_NOTICE "%s partition parsing not available\n", | |
596 | *types); | |
597 | continue; | |
598 | } | |
599 | ret = (*parser->parse_fn)(master, pparts, origin); | |
600 | if (ret > 0) { | |
97894cda | 601 | printk(KERN_NOTICE "%d %s partitions found on MTD device %s\n", |
1da177e4 LT |
602 | ret, parser->name, master->name); |
603 | } | |
604 | put_partition_parser(parser); | |
605 | } | |
606 | return ret; | |
607 | } | |
1da177e4 | 608 | EXPORT_SYMBOL_GPL(parse_mtd_partitions); |