Commit | Line | Data |
---|---|---|
61ecfa87 | 1 | /* |
a1452a37 DW |
2 | * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> et al. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | * |
1da177e4 LT |
18 | */ |
19 | ||
20 | #ifndef __MTD_MTD_H__ | |
21 | #define __MTD_MTD_H__ | |
22 | ||
1da177e4 | 23 | #include <linux/types.h> |
1da177e4 | 24 | #include <linux/uio.h> |
963a6fb0 | 25 | #include <linux/notifier.h> |
1f24b5a8 | 26 | #include <linux/device.h> |
1da177e4 | 27 | |
1da177e4 LT |
28 | #include <mtd/mtd-abi.h> |
29 | ||
69423d99 AH |
30 | #include <asm/div64.h> |
31 | ||
1da177e4 LT |
32 | #define MTD_CHAR_MAJOR 90 |
33 | #define MTD_BLOCK_MAJOR 31 | |
1da177e4 | 34 | |
e2e24e8e | 35 | #define MTD_ERASE_PENDING 0x01 |
1da177e4 LT |
36 | #define MTD_ERASING 0x02 |
37 | #define MTD_ERASE_SUSPEND 0x04 | |
e2e24e8e BN |
38 | #define MTD_ERASE_DONE 0x08 |
39 | #define MTD_ERASE_FAILED 0x10 | |
1da177e4 | 40 | |
69423d99 | 41 | #define MTD_FAIL_ADDR_UNKNOWN -1LL |
bb0eb217 | 42 | |
e2e24e8e BN |
43 | /* |
44 | * If the erase fails, fail_addr might indicate exactly which block failed. If | |
45 | * fail_addr = MTD_FAIL_ADDR_UNKNOWN, the failure was not at the device level | |
46 | * or was not specific to any particular block. | |
47 | */ | |
1da177e4 LT |
48 | struct erase_info { |
49 | struct mtd_info *mtd; | |
69423d99 AH |
50 | uint64_t addr; |
51 | uint64_t len; | |
52 | uint64_t fail_addr; | |
1da177e4 LT |
53 | u_long time; |
54 | u_long retries; | |
26cdb67c DW |
55 | unsigned dev; |
56 | unsigned cell; | |
1da177e4 LT |
57 | void (*callback) (struct erase_info *self); |
58 | u_long priv; | |
59 | u_char state; | |
60 | struct erase_info *next; | |
61 | }; | |
62 | ||
63 | struct mtd_erase_region_info { | |
e2e24e8e | 64 | uint64_t offset; /* At which this region starts, from the beginning of the MTD */ |
26cdb67c DW |
65 | uint32_t erasesize; /* For this region */ |
66 | uint32_t numblocks; /* Number of blocks of erasesize in this region */ | |
0ecbc81a | 67 | unsigned long *lockmap; /* If keeping bitmap of locks */ |
1da177e4 LT |
68 | }; |
69 | ||
8593fbc6 TG |
70 | /** |
71 | * struct mtd_oob_ops - oob operation operands | |
72 | * @mode: operation mode | |
73 | * | |
7014568b | 74 | * @len: number of data bytes to write/read |
8593fbc6 | 75 | * |
7014568b | 76 | * @retlen: number of data bytes written/read |
8593fbc6 | 77 | * |
7014568b VW |
78 | * @ooblen: number of oob bytes to write/read |
79 | * @oobretlen: number of oob bytes written/read | |
8593fbc6 | 80 | * @ooboffs: offset of oob data in the oob area (only relevant when |
4180f24a | 81 | * mode = MTD_OPS_PLACE_OOB or MTD_OPS_RAW) |
8593fbc6 TG |
82 | * @datbuf: data buffer - if NULL only oob data are read/written |
83 | * @oobbuf: oob data buffer | |
73a4421c | 84 | * |
025dfdaf | 85 | * Note, it is allowed to read more than one OOB area at one go, but not write. |
73a4421c AB |
86 | * The interface assumes that the OOB write requests program only one page's |
87 | * OOB area. | |
8593fbc6 TG |
88 | */ |
89 | struct mtd_oob_ops { | |
905c6bcd | 90 | unsigned int mode; |
8593fbc6 TG |
91 | size_t len; |
92 | size_t retlen; | |
93 | size_t ooblen; | |
7014568b | 94 | size_t oobretlen; |
8593fbc6 TG |
95 | uint32_t ooboffs; |
96 | uint8_t *datbuf; | |
97 | uint8_t *oobbuf; | |
98 | }; | |
99 | ||
cc26c3cd BN |
100 | #define MTD_MAX_OOBFREE_ENTRIES_LARGE 32 |
101 | #define MTD_MAX_ECCPOS_ENTRIES_LARGE 448 | |
cc26c3cd | 102 | /* |
0ceacf36 BN |
103 | * Internal ECC layout control structure. For historical reasons, there is a |
104 | * similar, smaller struct nand_ecclayout_user (in mtd-abi.h) that is retained | |
105 | * for export to user-space via the ECCGETLAYOUT ioctl. | |
106 | * nand_ecclayout should be expandable in the future simply by the above macros. | |
cc26c3cd BN |
107 | */ |
108 | struct nand_ecclayout { | |
109 | __u32 eccbytes; | |
110 | __u32 eccpos[MTD_MAX_ECCPOS_ENTRIES_LARGE]; | |
111 | __u32 oobavail; | |
112 | struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES_LARGE]; | |
113 | }; | |
114 | ||
de477254 PG |
115 | struct module; /* only needed for owner field in mtd_info */ |
116 | ||
1da177e4 LT |
117 | struct mtd_info { |
118 | u_char type; | |
26cdb67c | 119 | uint32_t flags; |
69423d99 | 120 | uint64_t size; // Total size of the MTD |
1da177e4 | 121 | |
151e7659 | 122 | /* "Major" erase size for the device. Naïve users may take this |
1da177e4 LT |
123 | * to be the only erase size available, or may use the more detailed |
124 | * information below if they desire | |
125 | */ | |
26cdb67c | 126 | uint32_t erasesize; |
783ed81f AB |
127 | /* Minimal writable flash unit size. In case of NOR flash it is 1 (even |
128 | * though individual bits can be cleared), in case of NAND flash it is | |
129 | * one NAND page (or half, or one-fourths of it), in case of ECC-ed NOR | |
130 | * it is of ECC block size, etc. It is illegal to have writesize = 0. | |
131 | * Any driver registering a struct mtd_info must ensure a writesize of | |
132 | * 1 or larger. | |
28318776 | 133 | */ |
26cdb67c | 134 | uint32_t writesize; |
1da177e4 | 135 | |
0e4ca7e5 AG |
136 | /* |
137 | * Size of the write buffer used by the MTD. MTD devices having a write | |
138 | * buffer can write multiple writesize chunks at a time. E.g. while | |
139 | * writing 4 * writesize bytes to a device with 2 * writesize bytes | |
140 | * buffer the MTD driver can (but doesn't have to) do 2 writesize | |
141 | * operations, but not 4. Currently, all NANDs have writebufsize | |
142 | * equivalent to writesize (NAND page size). Some NOR flashes do have | |
143 | * writebufsize greater than writesize. | |
144 | */ | |
145 | uint32_t writebufsize; | |
146 | ||
26cdb67c DW |
147 | uint32_t oobsize; // Amount of OOB data per block (e.g. 16) |
148 | uint32_t oobavail; // Available OOB bytes per block | |
1da177e4 | 149 | |
69423d99 AH |
150 | /* |
151 | * If erasesize is a power of 2 then the shift is stored in | |
152 | * erasesize_shift otherwise erasesize_shift is zero. Ditto writesize. | |
153 | */ | |
154 | unsigned int erasesize_shift; | |
155 | unsigned int writesize_shift; | |
156 | /* Masks based on erasesize_shift and writesize_shift */ | |
157 | unsigned int erasesize_mask; | |
158 | unsigned int writesize_mask; | |
638d9838 | 159 | |
1da177e4 | 160 | // Kernel-only stuff starts here. |
eadcf0d7 | 161 | const char *name; |
1da177e4 LT |
162 | int index; |
163 | ||
7854d3f7 | 164 | /* ECC layout structure pointer - read only! */ |
5bd34c09 | 165 | struct nand_ecclayout *ecclayout; |
1da177e4 LT |
166 | |
167 | /* Data for variable erase regions. If numeraseregions is zero, | |
61ecfa87 | 168 | * it means that the whole device has erasesize as given above. |
1da177e4 LT |
169 | */ |
170 | int numeraseregions; | |
61ecfa87 | 171 | struct mtd_erase_region_info *eraseregions; |
1da177e4 | 172 | |
b38178ee | 173 | /* |
7e1f0dc0 AB |
174 | * Do not call via these pointers, use corresponding mtd_*() |
175 | * wrappers instead. | |
b38178ee | 176 | */ |
3c3c10bb AB |
177 | int (*_erase) (struct mtd_info *mtd, struct erase_info *instr); |
178 | int (*_point) (struct mtd_info *mtd, loff_t from, size_t len, | |
179 | size_t *retlen, void **virt, resource_size_t *phys); | |
5e4e6e3f | 180 | int (*_unpoint) (struct mtd_info *mtd, loff_t from, size_t len); |
3c3c10bb AB |
181 | unsigned long (*_get_unmapped_area) (struct mtd_info *mtd, |
182 | unsigned long len, | |
183 | unsigned long offset, | |
184 | unsigned long flags); | |
185 | int (*_read) (struct mtd_info *mtd, loff_t from, size_t len, | |
186 | size_t *retlen, u_char *buf); | |
187 | int (*_write) (struct mtd_info *mtd, loff_t to, size_t len, | |
188 | size_t *retlen, const u_char *buf); | |
189 | int (*_panic_write) (struct mtd_info *mtd, loff_t to, size_t len, | |
190 | size_t *retlen, const u_char *buf); | |
191 | int (*_read_oob) (struct mtd_info *mtd, loff_t from, | |
a2cc5ba0 | 192 | struct mtd_oob_ops *ops); |
3c3c10bb AB |
193 | int (*_write_oob) (struct mtd_info *mtd, loff_t to, |
194 | struct mtd_oob_ops *ops); | |
195 | int (*_get_fact_prot_info) (struct mtd_info *mtd, struct otp_info *buf, | |
196 | size_t len); | |
197 | int (*_read_fact_prot_reg) (struct mtd_info *mtd, loff_t from, | |
198 | size_t len, size_t *retlen, u_char *buf); | |
199 | int (*_get_user_prot_info) (struct mtd_info *mtd, struct otp_info *buf, | |
200 | size_t len); | |
201 | int (*_read_user_prot_reg) (struct mtd_info *mtd, loff_t from, | |
202 | size_t len, size_t *retlen, u_char *buf); | |
203 | int (*_write_user_prot_reg) (struct mtd_info *mtd, loff_t to, | |
204 | size_t len, size_t *retlen, u_char *buf); | |
205 | int (*_lock_user_prot_reg) (struct mtd_info *mtd, loff_t from, | |
206 | size_t len); | |
207 | int (*_writev) (struct mtd_info *mtd, const struct kvec *vecs, | |
b0a31f7b | 208 | unsigned long count, loff_t to, size_t *retlen); |
3c3c10bb AB |
209 | void (*_sync) (struct mtd_info *mtd); |
210 | int (*_lock) (struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
211 | int (*_unlock) (struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
212 | int (*_is_locked) (struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
213 | int (*_block_isbad) (struct mtd_info *mtd, loff_t ofs); | |
214 | int (*_block_markbad) (struct mtd_info *mtd, loff_t ofs); | |
215 | int (*_suspend) (struct mtd_info *mtd); | |
216 | void (*_resume) (struct mtd_info *mtd); | |
a88d2dc6 AB |
217 | /* |
218 | * If the driver is something smart, like UBI, it may need to maintain | |
219 | * its own reference counting. The below functions are only for driver. | |
220 | */ | |
3c3c10bb AB |
221 | int (*_get_device) (struct mtd_info *mtd); |
222 | void (*_put_device) (struct mtd_info *mtd); | |
402d3265 DH |
223 | |
224 | /* Backing device capabilities for this device | |
225 | * - provides mmap capabilities | |
226 | */ | |
227 | struct backing_dev_info *backing_dev_info; | |
228 | ||
963a6fb0 NP |
229 | struct notifier_block reboot_notifier; /* default mode before reboot */ |
230 | ||
7fac4648 TG |
231 | /* ECC status information */ |
232 | struct mtd_ecc_stats ecc_stats; | |
29072b96 TG |
233 | /* Subpage shift (NAND) */ |
234 | int subpage_sft; | |
7fac4648 | 235 | |
1da177e4 LT |
236 | void *priv; |
237 | ||
238 | struct module *owner; | |
1f24b5a8 | 239 | struct device dev; |
1da177e4 LT |
240 | int usecount; |
241 | }; | |
242 | ||
7e1f0dc0 AB |
243 | /* |
244 | * Erase is an asynchronous operation. Device drivers are supposed | |
245 | * to call instr->callback() whenever the operation completes, even | |
246 | * if it completes with a failure. | |
247 | * Callers are supposed to pass a callback function and wait for it | |
248 | * to be called before writing to the block. | |
249 | */ | |
250 | static inline int mtd_erase(struct mtd_info *mtd, struct erase_info *instr) | |
251 | { | |
3c3c10bb | 252 | return mtd->_erase(mtd, instr); |
7e1f0dc0 AB |
253 | } |
254 | ||
d35ea200 AB |
255 | /* |
256 | * This stuff for eXecute-In-Place. phys is optional and may be set to NULL. | |
257 | */ | |
258 | static inline int mtd_point(struct mtd_info *mtd, loff_t from, size_t len, | |
259 | size_t *retlen, void **virt, resource_size_t *phys) | |
260 | { | |
9cf075f8 | 261 | *retlen = 0; |
3c3c10bb | 262 | if (!mtd->_point) |
10934478 | 263 | return -EOPNOTSUPP; |
3c3c10bb | 264 | return mtd->_point(mtd, from, len, retlen, virt, phys); |
d35ea200 AB |
265 | } |
266 | ||
7219778a | 267 | /* We probably shouldn't allow XIP if the unpoint isn't a NULL */ |
5e4e6e3f | 268 | static inline int mtd_unpoint(struct mtd_info *mtd, loff_t from, size_t len) |
7219778a | 269 | { |
5e4e6e3f AB |
270 | if (!mtd->_point) |
271 | return -EOPNOTSUPP; | |
3c3c10bb | 272 | return mtd->_unpoint(mtd, from, len); |
7219778a AB |
273 | } |
274 | ||
04c601bf AB |
275 | /* |
276 | * Allow NOMMU mmap() to directly map the device (if not NULL) | |
277 | * - return the address to which the offset maps | |
278 | * - return -ENOSYS to indicate refusal to do the mapping | |
279 | */ | |
280 | static inline unsigned long mtd_get_unmapped_area(struct mtd_info *mtd, | |
281 | unsigned long len, | |
282 | unsigned long offset, | |
283 | unsigned long flags) | |
284 | { | |
3c3c10bb | 285 | if (!mtd->_get_unmapped_area) |
cd621274 | 286 | return -EOPNOTSUPP; |
3c3c10bb | 287 | return mtd->_get_unmapped_area(mtd, len, offset, flags); |
04c601bf AB |
288 | } |
289 | ||
329ad399 AB |
290 | static inline int mtd_read(struct mtd_info *mtd, loff_t from, size_t len, |
291 | size_t *retlen, u_char *buf) | |
292 | { | |
3c3c10bb | 293 | return mtd->_read(mtd, from, len, retlen, buf); |
329ad399 AB |
294 | } |
295 | ||
eda95cbf AB |
296 | static inline int mtd_write(struct mtd_info *mtd, loff_t to, size_t len, |
297 | size_t *retlen, const u_char *buf) | |
298 | { | |
9cf075f8 | 299 | *retlen = 0; |
3c3c10bb | 300 | if (!mtd->_write) |
52b02031 | 301 | return -EROFS; |
3c3c10bb | 302 | return mtd->_write(mtd, to, len, retlen, buf); |
eda95cbf AB |
303 | } |
304 | ||
7ae79d7f AB |
305 | /* |
306 | * In blackbox flight recorder like scenarios we want to make successful writes | |
307 | * in interrupt context. panic_write() is only intended to be called when its | |
308 | * known the kernel is about to panic and we need the write to succeed. Since | |
309 | * the kernel is not going to be running for much longer, this function can | |
310 | * break locks and delay to ensure the write succeeds (but not sleep). | |
311 | */ | |
312 | static inline int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, | |
313 | size_t *retlen, const u_char *buf) | |
314 | { | |
9cf075f8 | 315 | *retlen = 0; |
3c3c10bb | 316 | if (!mtd->_panic_write) |
016c1291 | 317 | return -EOPNOTSUPP; |
3c3c10bb | 318 | return mtd->_panic_write(mtd, to, len, retlen, buf); |
7ae79d7f AB |
319 | } |
320 | ||
fd2819bb AB |
321 | static inline int mtd_read_oob(struct mtd_info *mtd, loff_t from, |
322 | struct mtd_oob_ops *ops) | |
323 | { | |
9cf075f8 | 324 | ops->retlen = ops->oobretlen = 0; |
3c3c10bb | 325 | if (!mtd->_read_oob) |
dac2639f | 326 | return -EOPNOTSUPP; |
3c3c10bb | 327 | return mtd->_read_oob(mtd, from, ops); |
fd2819bb AB |
328 | } |
329 | ||
a2cc5ba0 AB |
330 | static inline int mtd_write_oob(struct mtd_info *mtd, loff_t to, |
331 | struct mtd_oob_ops *ops) | |
332 | { | |
9cf075f8 | 333 | ops->retlen = ops->oobretlen = 0; |
3c3c10bb | 334 | if (!mtd->_write_oob) |
dac2639f | 335 | return -EOPNOTSUPP; |
3c3c10bb | 336 | return mtd->_write_oob(mtd, to, ops); |
a2cc5ba0 AB |
337 | } |
338 | ||
a750b5ce AB |
339 | /* |
340 | * Method to access the protection register area, present in some flash | |
341 | * devices. The user data is one time programmable but the factory data is read | |
342 | * only. | |
343 | */ | |
344 | static inline int mtd_get_fact_prot_info(struct mtd_info *mtd, | |
345 | struct otp_info *buf, size_t len) | |
346 | { | |
3c3c10bb | 347 | if (!mtd->_get_fact_prot_info) |
87e858a9 | 348 | return -EOPNOTSUPP; |
3c3c10bb | 349 | return mtd->_get_fact_prot_info(mtd, buf, len); |
a750b5ce AB |
350 | } |
351 | ||
d264f72a AB |
352 | static inline int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, |
353 | size_t len, size_t *retlen, | |
354 | u_char *buf) | |
355 | { | |
9cf075f8 | 356 | *retlen = 0; |
3c3c10bb | 357 | if (!mtd->_read_fact_prot_reg) |
b6de3d6c | 358 | return -EOPNOTSUPP; |
3c3c10bb | 359 | return mtd->_read_fact_prot_reg(mtd, from, len, retlen, buf); |
d264f72a AB |
360 | } |
361 | ||
855e5d8c AB |
362 | static inline int mtd_get_user_prot_info(struct mtd_info *mtd, |
363 | struct otp_info *buf, | |
364 | size_t len) | |
365 | { | |
3c3c10bb | 366 | if (!mtd->_get_user_prot_info) |
87e858a9 | 367 | return -EOPNOTSUPP; |
3c3c10bb | 368 | return mtd->_get_user_prot_info(mtd, buf, len); |
855e5d8c AB |
369 | } |
370 | ||
4ea1cabb AB |
371 | static inline int mtd_read_user_prot_reg(struct mtd_info *mtd, loff_t from, |
372 | size_t len, size_t *retlen, | |
373 | u_char *buf) | |
374 | { | |
9cf075f8 | 375 | *retlen = 0; |
3c3c10bb | 376 | if (!mtd->_read_user_prot_reg) |
b6de3d6c | 377 | return -EOPNOTSUPP; |
3c3c10bb | 378 | return mtd->_read_user_prot_reg(mtd, from, len, retlen, buf); |
4ea1cabb AB |
379 | } |
380 | ||
482b43ad AB |
381 | static inline int mtd_write_user_prot_reg(struct mtd_info *mtd, loff_t to, |
382 | size_t len, size_t *retlen, | |
383 | u_char *buf) | |
384 | { | |
9cf075f8 | 385 | *retlen = 0; |
3c3c10bb | 386 | if (!mtd->_write_user_prot_reg) |
27c151a5 | 387 | return -EOPNOTSUPP; |
3c3c10bb | 388 | return mtd->_write_user_prot_reg(mtd, to, len, retlen, buf); |
482b43ad AB |
389 | } |
390 | ||
4403dbfb AB |
391 | static inline int mtd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, |
392 | size_t len) | |
393 | { | |
3c3c10bb | 394 | if (!mtd->_lock_user_prot_reg) |
e2936b2a | 395 | return -EOPNOTSUPP; |
3c3c10bb | 396 | return mtd->_lock_user_prot_reg(mtd, from, len); |
4403dbfb AB |
397 | } |
398 | ||
1dbebd32 AB |
399 | int mtd_writev(struct mtd_info *mtd, const struct kvec *vecs, |
400 | unsigned long count, loff_t to, size_t *retlen); | |
b0a31f7b | 401 | |
85f2f2a8 AB |
402 | static inline void mtd_sync(struct mtd_info *mtd) |
403 | { | |
3c3c10bb AB |
404 | if (mtd->_sync) |
405 | mtd->_sync(mtd); | |
85f2f2a8 AB |
406 | } |
407 | ||
7799f9ac AB |
408 | /* Chip-supported device locking */ |
409 | static inline int mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) | |
410 | { | |
3c3c10bb | 411 | if (!mtd->_lock) |
38134565 | 412 | return -EOPNOTSUPP; |
3c3c10bb | 413 | return mtd->_lock(mtd, ofs, len); |
7799f9ac AB |
414 | } |
415 | ||
b66005cd AB |
416 | static inline int mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
417 | { | |
3c3c10bb | 418 | if (!mtd->_unlock) |
38134565 | 419 | return -EOPNOTSUPP; |
3c3c10bb | 420 | return mtd->_unlock(mtd, ofs, len); |
b66005cd AB |
421 | } |
422 | ||
e95e9786 AB |
423 | static inline int mtd_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len) |
424 | { | |
3c3c10bb | 425 | if (!mtd->_is_locked) |
38134565 | 426 | return -EOPNOTSUPP; |
3c3c10bb | 427 | return mtd->_is_locked(mtd, ofs, len); |
e95e9786 AB |
428 | } |
429 | ||
3fe4bae8 AB |
430 | static inline int mtd_suspend(struct mtd_info *mtd) |
431 | { | |
3c3c10bb | 432 | return mtd->_suspend ? mtd->_suspend(mtd) : 0; |
3fe4bae8 AB |
433 | } |
434 | ||
ead995f8 AB |
435 | static inline void mtd_resume(struct mtd_info *mtd) |
436 | { | |
3c3c10bb AB |
437 | if (mtd->_resume) |
438 | mtd->_resume(mtd); | |
ead995f8 AB |
439 | } |
440 | ||
7086c19d AB |
441 | static inline int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs) |
442 | { | |
3c3c10bb | 443 | if (!mtd->_block_isbad) |
d3712b9d | 444 | return 0; |
3c3c10bb | 445 | return mtd->_block_isbad(mtd, ofs); |
7086c19d AB |
446 | } |
447 | ||
5942ddbc AB |
448 | static inline int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs) |
449 | { | |
3c3c10bb | 450 | if (!mtd->_block_markbad) |
800ffd34 | 451 | return -EOPNOTSUPP; |
3c3c10bb | 452 | return mtd->_block_markbad(mtd, ofs); |
5942ddbc AB |
453 | } |
454 | ||
26cdb67c | 455 | static inline uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd) |
69423d99 AH |
456 | { |
457 | if (mtd->erasesize_shift) | |
458 | return sz >> mtd->erasesize_shift; | |
459 | do_div(sz, mtd->erasesize); | |
460 | return sz; | |
461 | } | |
462 | ||
26cdb67c | 463 | static inline uint32_t mtd_mod_by_eb(uint64_t sz, struct mtd_info *mtd) |
69423d99 AH |
464 | { |
465 | if (mtd->erasesize_shift) | |
466 | return sz & mtd->erasesize_mask; | |
467 | return do_div(sz, mtd->erasesize); | |
468 | } | |
469 | ||
26cdb67c | 470 | static inline uint32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd) |
69423d99 AH |
471 | { |
472 | if (mtd->writesize_shift) | |
473 | return sz >> mtd->writesize_shift; | |
474 | do_div(sz, mtd->writesize); | |
475 | return sz; | |
476 | } | |
477 | ||
26cdb67c | 478 | static inline uint32_t mtd_mod_by_ws(uint64_t sz, struct mtd_info *mtd) |
69423d99 AH |
479 | { |
480 | if (mtd->writesize_shift) | |
481 | return sz & mtd->writesize_mask; | |
482 | return do_div(sz, mtd->writesize); | |
483 | } | |
1da177e4 | 484 | |
fc002e3c AB |
485 | static inline int mtd_has_oob(const struct mtd_info *mtd) |
486 | { | |
3c3c10bb | 487 | return mtd->_read_oob && mtd->_write_oob; |
fc002e3c AB |
488 | } |
489 | ||
8f461a73 AB |
490 | static inline int mtd_can_have_bb(const struct mtd_info *mtd) |
491 | { | |
3c3c10bb | 492 | return !!mtd->_block_isbad; |
8f461a73 AB |
493 | } |
494 | ||
1da177e4 LT |
495 | /* Kernel-side ioctl definitions */ |
496 | ||
f5671ab3 | 497 | struct mtd_partition; |
c7975330 | 498 | struct mtd_part_parser_data; |
f5671ab3 | 499 | |
1c4c215c DES |
500 | extern int mtd_device_parse_register(struct mtd_info *mtd, |
501 | const char **part_probe_types, | |
c7975330 | 502 | struct mtd_part_parser_data *parser_data, |
1c4c215c DES |
503 | const struct mtd_partition *defparts, |
504 | int defnr_parts); | |
15c60a50 DES |
505 | #define mtd_device_register(master, parts, nr_parts) \ |
506 | mtd_device_parse_register(master, NULL, NULL, parts, nr_parts) | |
f5671ab3 | 507 | extern int mtd_device_unregister(struct mtd_info *master); |
1da177e4 | 508 | extern struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num); |
3bd45657 ML |
509 | extern int __get_mtd_device(struct mtd_info *mtd); |
510 | extern void __put_mtd_device(struct mtd_info *mtd); | |
7799308f | 511 | extern struct mtd_info *get_mtd_device_nm(const char *name); |
1da177e4 LT |
512 | extern void put_mtd_device(struct mtd_info *mtd); |
513 | ||
514 | ||
515 | struct mtd_notifier { | |
516 | void (*add)(struct mtd_info *mtd); | |
517 | void (*remove)(struct mtd_info *mtd); | |
518 | struct list_head list; | |
519 | }; | |
520 | ||
521 | ||
522 | extern void register_mtd_user (struct mtd_notifier *new); | |
523 | extern int unregister_mtd_user (struct mtd_notifier *old); | |
33b53716 GE |
524 | void *mtd_kmalloc_up_to(const struct mtd_info *mtd, size_t *size); |
525 | ||
1da177e4 | 526 | void mtd_erase_callback(struct erase_info *instr); |
1da177e4 | 527 | |
7387ce77 BN |
528 | static inline int mtd_is_bitflip(int err) { |
529 | return err == -EUCLEAN; | |
530 | } | |
531 | ||
532 | static inline int mtd_is_eccerr(int err) { | |
533 | return err == -EBADMSG; | |
534 | } | |
535 | ||
536 | static inline int mtd_is_bitflip_or_eccerr(int err) { | |
537 | return mtd_is_bitflip(err) || mtd_is_eccerr(err); | |
538 | } | |
1da177e4 LT |
539 | |
540 | #endif /* __MTD_MTD_H__ */ |