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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 | ||
e2e24e8e | 32 | #define MTD_ERASE_PENDING 0x01 |
1da177e4 LT |
33 | #define MTD_ERASING 0x02 |
34 | #define MTD_ERASE_SUSPEND 0x04 | |
e2e24e8e BN |
35 | #define MTD_ERASE_DONE 0x08 |
36 | #define MTD_ERASE_FAILED 0x10 | |
1da177e4 | 37 | |
69423d99 | 38 | #define MTD_FAIL_ADDR_UNKNOWN -1LL |
bb0eb217 | 39 | |
e2e24e8e BN |
40 | /* |
41 | * If the erase fails, fail_addr might indicate exactly which block failed. If | |
42 | * fail_addr = MTD_FAIL_ADDR_UNKNOWN, the failure was not at the device level | |
43 | * or was not specific to any particular block. | |
44 | */ | |
1da177e4 LT |
45 | struct erase_info { |
46 | struct mtd_info *mtd; | |
69423d99 AH |
47 | uint64_t addr; |
48 | uint64_t len; | |
49 | uint64_t fail_addr; | |
1da177e4 LT |
50 | u_long time; |
51 | u_long retries; | |
26cdb67c DW |
52 | unsigned dev; |
53 | unsigned cell; | |
1da177e4 LT |
54 | void (*callback) (struct erase_info *self); |
55 | u_long priv; | |
56 | u_char state; | |
57 | struct erase_info *next; | |
58 | }; | |
59 | ||
60 | struct mtd_erase_region_info { | |
e2e24e8e | 61 | uint64_t offset; /* At which this region starts, from the beginning of the MTD */ |
26cdb67c DW |
62 | uint32_t erasesize; /* For this region */ |
63 | uint32_t numblocks; /* Number of blocks of erasesize in this region */ | |
0ecbc81a | 64 | unsigned long *lockmap; /* If keeping bitmap of locks */ |
1da177e4 LT |
65 | }; |
66 | ||
8593fbc6 TG |
67 | /** |
68 | * struct mtd_oob_ops - oob operation operands | |
69 | * @mode: operation mode | |
70 | * | |
7014568b | 71 | * @len: number of data bytes to write/read |
8593fbc6 | 72 | * |
7014568b | 73 | * @retlen: number of data bytes written/read |
8593fbc6 | 74 | * |
7014568b VW |
75 | * @ooblen: number of oob bytes to write/read |
76 | * @oobretlen: number of oob bytes written/read | |
8593fbc6 | 77 | * @ooboffs: offset of oob data in the oob area (only relevant when |
4180f24a | 78 | * mode = MTD_OPS_PLACE_OOB or MTD_OPS_RAW) |
8593fbc6 TG |
79 | * @datbuf: data buffer - if NULL only oob data are read/written |
80 | * @oobbuf: oob data buffer | |
73a4421c | 81 | * |
025dfdaf | 82 | * Note, it is allowed to read more than one OOB area at one go, but not write. |
73a4421c AB |
83 | * The interface assumes that the OOB write requests program only one page's |
84 | * OOB area. | |
8593fbc6 TG |
85 | */ |
86 | struct mtd_oob_ops { | |
905c6bcd | 87 | unsigned int mode; |
8593fbc6 TG |
88 | size_t len; |
89 | size_t retlen; | |
90 | size_t ooblen; | |
7014568b | 91 | size_t oobretlen; |
8593fbc6 TG |
92 | uint32_t ooboffs; |
93 | uint8_t *datbuf; | |
94 | uint8_t *oobbuf; | |
95 | }; | |
96 | ||
cc26c3cd | 97 | #define MTD_MAX_OOBFREE_ENTRIES_LARGE 32 |
2f25ae97 | 98 | #define MTD_MAX_ECCPOS_ENTRIES_LARGE 640 |
cc26c3cd | 99 | /* |
0ceacf36 BN |
100 | * Internal ECC layout control structure. For historical reasons, there is a |
101 | * similar, smaller struct nand_ecclayout_user (in mtd-abi.h) that is retained | |
102 | * for export to user-space via the ECCGETLAYOUT ioctl. | |
103 | * nand_ecclayout should be expandable in the future simply by the above macros. | |
cc26c3cd BN |
104 | */ |
105 | struct nand_ecclayout { | |
106 | __u32 eccbytes; | |
107 | __u32 eccpos[MTD_MAX_ECCPOS_ENTRIES_LARGE]; | |
108 | __u32 oobavail; | |
109 | struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES_LARGE]; | |
110 | }; | |
111 | ||
de477254 PG |
112 | struct module; /* only needed for owner field in mtd_info */ |
113 | ||
1da177e4 LT |
114 | struct mtd_info { |
115 | u_char type; | |
26cdb67c | 116 | uint32_t flags; |
69423d99 | 117 | uint64_t size; // Total size of the MTD |
1da177e4 | 118 | |
151e7659 | 119 | /* "Major" erase size for the device. Naïve users may take this |
1da177e4 LT |
120 | * to be the only erase size available, or may use the more detailed |
121 | * information below if they desire | |
122 | */ | |
26cdb67c | 123 | uint32_t erasesize; |
783ed81f AB |
124 | /* Minimal writable flash unit size. In case of NOR flash it is 1 (even |
125 | * though individual bits can be cleared), in case of NAND flash it is | |
126 | * one NAND page (or half, or one-fourths of it), in case of ECC-ed NOR | |
127 | * it is of ECC block size, etc. It is illegal to have writesize = 0. | |
128 | * Any driver registering a struct mtd_info must ensure a writesize of | |
129 | * 1 or larger. | |
28318776 | 130 | */ |
26cdb67c | 131 | uint32_t writesize; |
1da177e4 | 132 | |
0e4ca7e5 AG |
133 | /* |
134 | * Size of the write buffer used by the MTD. MTD devices having a write | |
135 | * buffer can write multiple writesize chunks at a time. E.g. while | |
136 | * writing 4 * writesize bytes to a device with 2 * writesize bytes | |
137 | * buffer the MTD driver can (but doesn't have to) do 2 writesize | |
138 | * operations, but not 4. Currently, all NANDs have writebufsize | |
139 | * equivalent to writesize (NAND page size). Some NOR flashes do have | |
140 | * writebufsize greater than writesize. | |
141 | */ | |
142 | uint32_t writebufsize; | |
143 | ||
26cdb67c DW |
144 | uint32_t oobsize; // Amount of OOB data per block (e.g. 16) |
145 | uint32_t oobavail; // Available OOB bytes per block | |
1da177e4 | 146 | |
69423d99 AH |
147 | /* |
148 | * If erasesize is a power of 2 then the shift is stored in | |
149 | * erasesize_shift otherwise erasesize_shift is zero. Ditto writesize. | |
150 | */ | |
151 | unsigned int erasesize_shift; | |
152 | unsigned int writesize_shift; | |
153 | /* Masks based on erasesize_shift and writesize_shift */ | |
154 | unsigned int erasesize_mask; | |
155 | unsigned int writesize_mask; | |
638d9838 | 156 | |
d062d4ed MD |
157 | /* |
158 | * read ops return -EUCLEAN if max number of bitflips corrected on any | |
159 | * one region comprising an ecc step equals or exceeds this value. | |
160 | * Settable by driver, else defaults to ecc_strength. User can override | |
161 | * in sysfs. N.B. The meaning of the -EUCLEAN return code has changed; | |
162 | * see Documentation/ABI/testing/sysfs-class-mtd for more detail. | |
163 | */ | |
164 | unsigned int bitflip_threshold; | |
165 | ||
1da177e4 | 166 | // Kernel-only stuff starts here. |
eadcf0d7 | 167 | const char *name; |
1da177e4 LT |
168 | int index; |
169 | ||
7854d3f7 | 170 | /* ECC layout structure pointer - read only! */ |
5bd34c09 | 171 | struct nand_ecclayout *ecclayout; |
1da177e4 | 172 | |
c41a0582 HS |
173 | /* the ecc step size. */ |
174 | unsigned int ecc_step_size; | |
175 | ||
86c2072b | 176 | /* max number of correctible bit errors per ecc step */ |
1d0b95b0 MD |
177 | unsigned int ecc_strength; |
178 | ||
1da177e4 | 179 | /* Data for variable erase regions. If numeraseregions is zero, |
61ecfa87 | 180 | * it means that the whole device has erasesize as given above. |
1da177e4 LT |
181 | */ |
182 | int numeraseregions; | |
61ecfa87 | 183 | struct mtd_erase_region_info *eraseregions; |
1da177e4 | 184 | |
b38178ee | 185 | /* |
7e1f0dc0 AB |
186 | * Do not call via these pointers, use corresponding mtd_*() |
187 | * wrappers instead. | |
b38178ee | 188 | */ |
3c3c10bb AB |
189 | int (*_erase) (struct mtd_info *mtd, struct erase_info *instr); |
190 | int (*_point) (struct mtd_info *mtd, loff_t from, size_t len, | |
191 | size_t *retlen, void **virt, resource_size_t *phys); | |
5e4e6e3f | 192 | int (*_unpoint) (struct mtd_info *mtd, loff_t from, size_t len); |
3c3c10bb AB |
193 | unsigned long (*_get_unmapped_area) (struct mtd_info *mtd, |
194 | unsigned long len, | |
195 | unsigned long offset, | |
196 | unsigned long flags); | |
197 | int (*_read) (struct mtd_info *mtd, loff_t from, size_t len, | |
198 | size_t *retlen, u_char *buf); | |
199 | int (*_write) (struct mtd_info *mtd, loff_t to, size_t len, | |
200 | size_t *retlen, const u_char *buf); | |
201 | int (*_panic_write) (struct mtd_info *mtd, loff_t to, size_t len, | |
202 | size_t *retlen, const u_char *buf); | |
203 | int (*_read_oob) (struct mtd_info *mtd, loff_t from, | |
a2cc5ba0 | 204 | struct mtd_oob_ops *ops); |
3c3c10bb AB |
205 | int (*_write_oob) (struct mtd_info *mtd, loff_t to, |
206 | struct mtd_oob_ops *ops); | |
4b78fc42 CR |
207 | int (*_get_fact_prot_info) (struct mtd_info *mtd, size_t len, |
208 | size_t *retlen, struct otp_info *buf); | |
3c3c10bb AB |
209 | int (*_read_fact_prot_reg) (struct mtd_info *mtd, loff_t from, |
210 | size_t len, size_t *retlen, u_char *buf); | |
4b78fc42 CR |
211 | int (*_get_user_prot_info) (struct mtd_info *mtd, size_t len, |
212 | size_t *retlen, struct otp_info *buf); | |
3c3c10bb AB |
213 | int (*_read_user_prot_reg) (struct mtd_info *mtd, loff_t from, |
214 | size_t len, size_t *retlen, u_char *buf); | |
215 | int (*_write_user_prot_reg) (struct mtd_info *mtd, loff_t to, | |
216 | size_t len, size_t *retlen, u_char *buf); | |
217 | int (*_lock_user_prot_reg) (struct mtd_info *mtd, loff_t from, | |
218 | size_t len); | |
219 | int (*_writev) (struct mtd_info *mtd, const struct kvec *vecs, | |
b0a31f7b | 220 | unsigned long count, loff_t to, size_t *retlen); |
3c3c10bb AB |
221 | void (*_sync) (struct mtd_info *mtd); |
222 | int (*_lock) (struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
223 | int (*_unlock) (struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
224 | int (*_is_locked) (struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
8471bb73 | 225 | int (*_block_isreserved) (struct mtd_info *mtd, loff_t ofs); |
3c3c10bb AB |
226 | int (*_block_isbad) (struct mtd_info *mtd, loff_t ofs); |
227 | int (*_block_markbad) (struct mtd_info *mtd, loff_t ofs); | |
228 | int (*_suspend) (struct mtd_info *mtd); | |
229 | void (*_resume) (struct mtd_info *mtd); | |
3efe41be | 230 | void (*_reboot) (struct mtd_info *mtd); |
a88d2dc6 AB |
231 | /* |
232 | * If the driver is something smart, like UBI, it may need to maintain | |
233 | * its own reference counting. The below functions are only for driver. | |
234 | */ | |
3c3c10bb AB |
235 | int (*_get_device) (struct mtd_info *mtd); |
236 | void (*_put_device) (struct mtd_info *mtd); | |
402d3265 DH |
237 | |
238 | /* Backing device capabilities for this device | |
239 | * - provides mmap capabilities | |
240 | */ | |
241 | struct backing_dev_info *backing_dev_info; | |
242 | ||
963a6fb0 NP |
243 | struct notifier_block reboot_notifier; /* default mode before reboot */ |
244 | ||
7fac4648 TG |
245 | /* ECC status information */ |
246 | struct mtd_ecc_stats ecc_stats; | |
29072b96 TG |
247 | /* Subpage shift (NAND) */ |
248 | int subpage_sft; | |
7fac4648 | 249 | |
1da177e4 LT |
250 | void *priv; |
251 | ||
252 | struct module *owner; | |
1f24b5a8 | 253 | struct device dev; |
1da177e4 LT |
254 | int usecount; |
255 | }; | |
256 | ||
8273a0c9 AB |
257 | int mtd_erase(struct mtd_info *mtd, struct erase_info *instr); |
258 | int mtd_point(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, | |
259 | void **virt, resource_size_t *phys); | |
260 | int mtd_unpoint(struct mtd_info *mtd, loff_t from, size_t len); | |
261 | unsigned long mtd_get_unmapped_area(struct mtd_info *mtd, unsigned long len, | |
262 | unsigned long offset, unsigned long flags); | |
263 | int mtd_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, | |
264 | u_char *buf); | |
265 | int mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, | |
266 | const u_char *buf); | |
267 | int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, | |
268 | const u_char *buf); | |
7ae79d7f | 269 | |
d2d48480 | 270 | int mtd_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops); |
fd2819bb | 271 | |
a2cc5ba0 AB |
272 | static inline int mtd_write_oob(struct mtd_info *mtd, loff_t to, |
273 | struct mtd_oob_ops *ops) | |
274 | { | |
9cf075f8 | 275 | ops->retlen = ops->oobretlen = 0; |
3c3c10bb | 276 | if (!mtd->_write_oob) |
dac2639f | 277 | return -EOPNOTSUPP; |
664addc2 AB |
278 | if (!(mtd->flags & MTD_WRITEABLE)) |
279 | return -EROFS; | |
3c3c10bb | 280 | return mtd->_write_oob(mtd, to, ops); |
a2cc5ba0 AB |
281 | } |
282 | ||
4b78fc42 CR |
283 | int mtd_get_fact_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen, |
284 | struct otp_info *buf); | |
de3cac93 AB |
285 | int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, size_t len, |
286 | size_t *retlen, u_char *buf); | |
4b78fc42 CR |
287 | int mtd_get_user_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen, |
288 | struct otp_info *buf); | |
de3cac93 AB |
289 | int mtd_read_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len, |
290 | size_t *retlen, u_char *buf); | |
291 | int mtd_write_user_prot_reg(struct mtd_info *mtd, loff_t to, size_t len, | |
292 | size_t *retlen, u_char *buf); | |
293 | int mtd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len); | |
4403dbfb | 294 | |
1dbebd32 AB |
295 | int mtd_writev(struct mtd_info *mtd, const struct kvec *vecs, |
296 | unsigned long count, loff_t to, size_t *retlen); | |
b0a31f7b | 297 | |
85f2f2a8 AB |
298 | static inline void mtd_sync(struct mtd_info *mtd) |
299 | { | |
3c3c10bb AB |
300 | if (mtd->_sync) |
301 | mtd->_sync(mtd); | |
85f2f2a8 AB |
302 | } |
303 | ||
8273a0c9 AB |
304 | int mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len); |
305 | int mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
306 | int mtd_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
8471bb73 | 307 | int mtd_block_isreserved(struct mtd_info *mtd, loff_t ofs); |
8273a0c9 AB |
308 | int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs); |
309 | int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs); | |
e95e9786 | 310 | |
3fe4bae8 AB |
311 | static inline int mtd_suspend(struct mtd_info *mtd) |
312 | { | |
3c3c10bb | 313 | return mtd->_suspend ? mtd->_suspend(mtd) : 0; |
3fe4bae8 AB |
314 | } |
315 | ||
ead995f8 AB |
316 | static inline void mtd_resume(struct mtd_info *mtd) |
317 | { | |
3c3c10bb AB |
318 | if (mtd->_resume) |
319 | mtd->_resume(mtd); | |
ead995f8 AB |
320 | } |
321 | ||
26cdb67c | 322 | static inline uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd) |
69423d99 AH |
323 | { |
324 | if (mtd->erasesize_shift) | |
325 | return sz >> mtd->erasesize_shift; | |
326 | do_div(sz, mtd->erasesize); | |
327 | return sz; | |
328 | } | |
329 | ||
26cdb67c | 330 | static inline uint32_t mtd_mod_by_eb(uint64_t sz, struct mtd_info *mtd) |
69423d99 AH |
331 | { |
332 | if (mtd->erasesize_shift) | |
333 | return sz & mtd->erasesize_mask; | |
334 | return do_div(sz, mtd->erasesize); | |
335 | } | |
336 | ||
26cdb67c | 337 | static inline uint32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd) |
69423d99 AH |
338 | { |
339 | if (mtd->writesize_shift) | |
340 | return sz >> mtd->writesize_shift; | |
341 | do_div(sz, mtd->writesize); | |
342 | return sz; | |
343 | } | |
344 | ||
26cdb67c | 345 | static inline uint32_t mtd_mod_by_ws(uint64_t sz, struct mtd_info *mtd) |
69423d99 AH |
346 | { |
347 | if (mtd->writesize_shift) | |
348 | return sz & mtd->writesize_mask; | |
349 | return do_div(sz, mtd->writesize); | |
350 | } | |
1da177e4 | 351 | |
fc002e3c AB |
352 | static inline int mtd_has_oob(const struct mtd_info *mtd) |
353 | { | |
3c3c10bb | 354 | return mtd->_read_oob && mtd->_write_oob; |
fc002e3c AB |
355 | } |
356 | ||
818b9739 HS |
357 | static inline int mtd_type_is_nand(const struct mtd_info *mtd) |
358 | { | |
359 | return mtd->type == MTD_NANDFLASH || mtd->type == MTD_MLCNANDFLASH; | |
360 | } | |
361 | ||
8f461a73 AB |
362 | static inline int mtd_can_have_bb(const struct mtd_info *mtd) |
363 | { | |
3c3c10bb | 364 | return !!mtd->_block_isbad; |
8f461a73 AB |
365 | } |
366 | ||
1da177e4 LT |
367 | /* Kernel-side ioctl definitions */ |
368 | ||
f5671ab3 | 369 | struct mtd_partition; |
c7975330 | 370 | struct mtd_part_parser_data; |
f5671ab3 | 371 | |
1c4c215c | 372 | extern int mtd_device_parse_register(struct mtd_info *mtd, |
26a47346 AB |
373 | const char * const *part_probe_types, |
374 | struct mtd_part_parser_data *parser_data, | |
375 | const struct mtd_partition *defparts, | |
376 | int defnr_parts); | |
15c60a50 DES |
377 | #define mtd_device_register(master, parts, nr_parts) \ |
378 | mtd_device_parse_register(master, NULL, NULL, parts, nr_parts) | |
f5671ab3 | 379 | extern int mtd_device_unregister(struct mtd_info *master); |
1da177e4 | 380 | extern struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num); |
3bd45657 ML |
381 | extern int __get_mtd_device(struct mtd_info *mtd); |
382 | extern void __put_mtd_device(struct mtd_info *mtd); | |
7799308f | 383 | extern struct mtd_info *get_mtd_device_nm(const char *name); |
1da177e4 LT |
384 | extern void put_mtd_device(struct mtd_info *mtd); |
385 | ||
386 | ||
387 | struct mtd_notifier { | |
388 | void (*add)(struct mtd_info *mtd); | |
389 | void (*remove)(struct mtd_info *mtd); | |
390 | struct list_head list; | |
391 | }; | |
392 | ||
393 | ||
394 | extern void register_mtd_user (struct mtd_notifier *new); | |
395 | extern int unregister_mtd_user (struct mtd_notifier *old); | |
33b53716 GE |
396 | void *mtd_kmalloc_up_to(const struct mtd_info *mtd, size_t *size); |
397 | ||
1da177e4 | 398 | void mtd_erase_callback(struct erase_info *instr); |
1da177e4 | 399 | |
7387ce77 BN |
400 | static inline int mtd_is_bitflip(int err) { |
401 | return err == -EUCLEAN; | |
402 | } | |
403 | ||
404 | static inline int mtd_is_eccerr(int err) { | |
405 | return err == -EBADMSG; | |
406 | } | |
407 | ||
408 | static inline int mtd_is_bitflip_or_eccerr(int err) { | |
409 | return mtd_is_bitflip(err) || mtd_is_eccerr(err); | |
410 | } | |
1da177e4 | 411 | |
b4caecd4 CH |
412 | unsigned mtd_mmap_capabilities(struct mtd_info *mtd); |
413 | ||
1da177e4 | 414 | #endif /* __MTD_MTD_H__ */ |