Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
a1452a37 DW |
2 | * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> |
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 LT |
17 | * |
18 | */ | |
19 | ||
15fdc52f TG |
20 | #include <linux/device.h> |
21 | #include <linux/fs.h> | |
0c1eafdb | 22 | #include <linux/mm.h> |
9c74034f | 23 | #include <linux/err.h> |
15fdc52f | 24 | #include <linux/init.h> |
1da177e4 LT |
25 | #include <linux/kernel.h> |
26 | #include <linux/module.h> | |
15fdc52f TG |
27 | #include <linux/slab.h> |
28 | #include <linux/sched.h> | |
5aa82940 | 29 | #include <linux/mutex.h> |
402d3265 | 30 | #include <linux/backing-dev.h> |
97718540 | 31 | #include <linux/compat.h> |
cd874237 | 32 | #include <linux/mount.h> |
d0f7959e | 33 | #include <linux/blkpg.h> |
b502bd11 | 34 | #include <linux/magic.h> |
f83c3838 | 35 | #include <linux/major.h> |
1da177e4 | 36 | #include <linux/mtd/mtd.h> |
d0f7959e | 37 | #include <linux/mtd/partitions.h> |
dd02b67d | 38 | #include <linux/mtd/map.h> |
1da177e4 | 39 | |
15fdc52f | 40 | #include <asm/uaccess.h> |
9bc7b387 | 41 | |
660685d9 AB |
42 | #include "mtdcore.h" |
43 | ||
5aa82940 | 44 | static DEFINE_MUTEX(mtd_mutex); |
1da177e4 | 45 | |
045e9a5d | 46 | /* |
f1a28c02 | 47 | * Data structure to hold the pointer to the mtd device as well |
92394b5c | 48 | * as mode information of various use cases. |
045e9a5d | 49 | */ |
f1a28c02 TG |
50 | struct mtd_file_info { |
51 | struct mtd_info *mtd; | |
52 | enum mtd_file_modes mode; | |
53 | }; | |
31f4233b | 54 | |
969e57ad | 55 | static loff_t mtdchar_lseek(struct file *file, loff_t offset, int orig) |
1da177e4 | 56 | { |
f1a28c02 | 57 | struct mtd_file_info *mfi = file->private_data; |
b959957f | 58 | return fixed_size_llseek(file, offset, orig, mfi->mtd->size); |
1da177e4 LT |
59 | } |
60 | ||
969e57ad | 61 | static int mtdchar_open(struct inode *inode, struct file *file) |
1da177e4 LT |
62 | { |
63 | int minor = iminor(inode); | |
64 | int devnum = minor >> 1; | |
6071239e | 65 | int ret = 0; |
1da177e4 | 66 | struct mtd_info *mtd; |
f1a28c02 | 67 | struct mtd_file_info *mfi; |
1da177e4 | 68 | |
289c0522 | 69 | pr_debug("MTD_open\n"); |
1da177e4 | 70 | |
1da177e4 | 71 | /* You can't open the RO devices RW */ |
aeb5d727 | 72 | if ((file->f_mode & FMODE_WRITE) && (minor & 1)) |
1da177e4 LT |
73 | return -EACCES; |
74 | ||
5aa82940 | 75 | mutex_lock(&mtd_mutex); |
1da177e4 | 76 | mtd = get_mtd_device(NULL, devnum); |
97894cda | 77 | |
6071239e JC |
78 | if (IS_ERR(mtd)) { |
79 | ret = PTR_ERR(mtd); | |
80 | goto out; | |
81 | } | |
97894cda | 82 | |
402d3265 | 83 | if (mtd->type == MTD_ABSENT) { |
6071239e | 84 | ret = -ENODEV; |
c65390f4 | 85 | goto out1; |
1da177e4 LT |
86 | } |
87 | ||
1da177e4 | 88 | /* You can't open it RW if it's not a writeable device */ |
aeb5d727 | 89 | if ((file->f_mode & FMODE_WRITE) && !(mtd->flags & MTD_WRITEABLE)) { |
6071239e | 90 | ret = -EACCES; |
b4caecd4 | 91 | goto out1; |
1da177e4 | 92 | } |
97894cda | 93 | |
f1a28c02 TG |
94 | mfi = kzalloc(sizeof(*mfi), GFP_KERNEL); |
95 | if (!mfi) { | |
6071239e | 96 | ret = -ENOMEM; |
b4caecd4 | 97 | goto out1; |
f1a28c02 TG |
98 | } |
99 | mfi->mtd = mtd; | |
100 | file->private_data = mfi; | |
c65390f4 AV |
101 | mutex_unlock(&mtd_mutex); |
102 | return 0; | |
f1a28c02 | 103 | |
c65390f4 AV |
104 | out1: |
105 | put_mtd_device(mtd); | |
6071239e | 106 | out: |
5aa82940 | 107 | mutex_unlock(&mtd_mutex); |
6071239e | 108 | return ret; |
969e57ad | 109 | } /* mtdchar_open */ |
1da177e4 LT |
110 | |
111 | /*====================================================================*/ | |
112 | ||
969e57ad | 113 | static int mtdchar_close(struct inode *inode, struct file *file) |
1da177e4 | 114 | { |
f1a28c02 TG |
115 | struct mtd_file_info *mfi = file->private_data; |
116 | struct mtd_info *mtd = mfi->mtd; | |
1da177e4 | 117 | |
289c0522 | 118 | pr_debug("MTD_close\n"); |
1da177e4 | 119 | |
7eafaed5 | 120 | /* Only sync if opened RW */ |
327cf292 | 121 | if ((file->f_mode & FMODE_WRITE)) |
85f2f2a8 | 122 | mtd_sync(mtd); |
97894cda | 123 | |
1da177e4 | 124 | put_mtd_device(mtd); |
f1a28c02 TG |
125 | file->private_data = NULL; |
126 | kfree(mfi); | |
1da177e4 LT |
127 | |
128 | return 0; | |
969e57ad | 129 | } /* mtdchar_close */ |
1da177e4 | 130 | |
3e45cf5e GE |
131 | /* Back in June 2001, dwmw2 wrote: |
132 | * | |
133 | * FIXME: This _really_ needs to die. In 2.5, we should lock the | |
134 | * userspace buffer down and use it directly with readv/writev. | |
135 | * | |
136 | * The implementation below, using mtd_kmalloc_up_to, mitigates | |
137 | * allocation failures when the system is under low-memory situations | |
138 | * or if memory is highly fragmented at the cost of reducing the | |
139 | * performance of the requested transfer due to a smaller buffer size. | |
140 | * | |
141 | * A more complex but more memory-efficient implementation based on | |
142 | * get_user_pages and iovecs to cover extents of those pages is a | |
143 | * longer-term goal, as intimated by dwmw2 above. However, for the | |
144 | * write case, this requires yet more complex head and tail transfer | |
145 | * handling when those head and tail offsets and sizes are such that | |
146 | * alignment requirements are not met in the NAND subdriver. | |
147 | */ | |
1da177e4 | 148 | |
969e57ad AB |
149 | static ssize_t mtdchar_read(struct file *file, char __user *buf, size_t count, |
150 | loff_t *ppos) | |
1da177e4 | 151 | { |
f1a28c02 TG |
152 | struct mtd_file_info *mfi = file->private_data; |
153 | struct mtd_info *mtd = mfi->mtd; | |
30fa9848 | 154 | size_t retlen; |
1da177e4 LT |
155 | size_t total_retlen=0; |
156 | int ret=0; | |
157 | int len; | |
3e45cf5e | 158 | size_t size = count; |
1da177e4 | 159 | char *kbuf; |
97894cda | 160 | |
289c0522 | 161 | pr_debug("MTD_read\n"); |
1da177e4 LT |
162 | |
163 | if (*ppos + count > mtd->size) | |
164 | count = mtd->size - *ppos; | |
165 | ||
166 | if (!count) | |
167 | return 0; | |
97894cda | 168 | |
3e45cf5e | 169 | kbuf = mtd_kmalloc_up_to(mtd, &size); |
b802c074 TG |
170 | if (!kbuf) |
171 | return -ENOMEM; | |
172 | ||
1da177e4 | 173 | while (count) { |
3e45cf5e | 174 | len = min_t(size_t, count, size); |
1da177e4 | 175 | |
f1a28c02 | 176 | switch (mfi->mode) { |
beb133fc | 177 | case MTD_FILE_MODE_OTP_FACTORY: |
d264f72a AB |
178 | ret = mtd_read_fact_prot_reg(mtd, *ppos, len, |
179 | &retlen, kbuf); | |
31f4233b | 180 | break; |
beb133fc | 181 | case MTD_FILE_MODE_OTP_USER: |
4ea1cabb AB |
182 | ret = mtd_read_user_prot_reg(mtd, *ppos, len, |
183 | &retlen, kbuf); | |
31f4233b | 184 | break; |
beb133fc | 185 | case MTD_FILE_MODE_RAW: |
f1a28c02 TG |
186 | { |
187 | struct mtd_oob_ops ops; | |
188 | ||
0612b9dd | 189 | ops.mode = MTD_OPS_RAW; |
f1a28c02 TG |
190 | ops.datbuf = kbuf; |
191 | ops.oobbuf = NULL; | |
192 | ops.len = len; | |
193 | ||
fd2819bb | 194 | ret = mtd_read_oob(mtd, *ppos, &ops); |
f1a28c02 TG |
195 | retlen = ops.retlen; |
196 | break; | |
197 | } | |
31f4233b | 198 | default: |
329ad399 | 199 | ret = mtd_read(mtd, *ppos, len, &retlen, kbuf); |
31f4233b | 200 | } |
7854d3f7 | 201 | /* Nand returns -EBADMSG on ECC errors, but it returns |
1da177e4 | 202 | * the data. For our userspace tools it is important |
7854d3f7 | 203 | * to dump areas with ECC errors! |
9a1fcdfd | 204 | * For kernel internal usage it also might return -EUCLEAN |
25985edc | 205 | * to signal the caller that a bitflip has occurred and has |
9a1fcdfd | 206 | * been corrected by the ECC algorithm. |
1da177e4 LT |
207 | * Userspace software which accesses NAND this way |
208 | * must be aware of the fact that it deals with NAND | |
209 | */ | |
d57f4054 | 210 | if (!ret || mtd_is_bitflip_or_eccerr(ret)) { |
1da177e4 LT |
211 | *ppos += retlen; |
212 | if (copy_to_user(buf, kbuf, retlen)) { | |
f4a43cfc | 213 | kfree(kbuf); |
1da177e4 LT |
214 | return -EFAULT; |
215 | } | |
216 | else | |
217 | total_retlen += retlen; | |
218 | ||
219 | count -= retlen; | |
220 | buf += retlen; | |
31f4233b NP |
221 | if (retlen == 0) |
222 | count = 0; | |
1da177e4 LT |
223 | } |
224 | else { | |
225 | kfree(kbuf); | |
226 | return ret; | |
227 | } | |
97894cda | 228 | |
1da177e4 LT |
229 | } |
230 | ||
b802c074 | 231 | kfree(kbuf); |
1da177e4 | 232 | return total_retlen; |
969e57ad | 233 | } /* mtdchar_read */ |
1da177e4 | 234 | |
969e57ad AB |
235 | static ssize_t mtdchar_write(struct file *file, const char __user *buf, size_t count, |
236 | loff_t *ppos) | |
1da177e4 | 237 | { |
f1a28c02 TG |
238 | struct mtd_file_info *mfi = file->private_data; |
239 | struct mtd_info *mtd = mfi->mtd; | |
3e45cf5e | 240 | size_t size = count; |
1da177e4 LT |
241 | char *kbuf; |
242 | size_t retlen; | |
243 | size_t total_retlen=0; | |
244 | int ret=0; | |
245 | int len; | |
246 | ||
289c0522 | 247 | pr_debug("MTD_write\n"); |
97894cda | 248 | |
1da177e4 LT |
249 | if (*ppos == mtd->size) |
250 | return -ENOSPC; | |
97894cda | 251 | |
1da177e4 LT |
252 | if (*ppos + count > mtd->size) |
253 | count = mtd->size - *ppos; | |
254 | ||
255 | if (!count) | |
256 | return 0; | |
257 | ||
3e45cf5e | 258 | kbuf = mtd_kmalloc_up_to(mtd, &size); |
b802c074 TG |
259 | if (!kbuf) |
260 | return -ENOMEM; | |
261 | ||
1da177e4 | 262 | while (count) { |
3e45cf5e | 263 | len = min_t(size_t, count, size); |
1da177e4 | 264 | |
1da177e4 LT |
265 | if (copy_from_user(kbuf, buf, len)) { |
266 | kfree(kbuf); | |
267 | return -EFAULT; | |
268 | } | |
97894cda | 269 | |
f1a28c02 | 270 | switch (mfi->mode) { |
beb133fc | 271 | case MTD_FILE_MODE_OTP_FACTORY: |
31f4233b NP |
272 | ret = -EROFS; |
273 | break; | |
beb133fc | 274 | case MTD_FILE_MODE_OTP_USER: |
482b43ad AB |
275 | ret = mtd_write_user_prot_reg(mtd, *ppos, len, |
276 | &retlen, kbuf); | |
31f4233b | 277 | break; |
f1a28c02 | 278 | |
beb133fc | 279 | case MTD_FILE_MODE_RAW: |
f1a28c02 TG |
280 | { |
281 | struct mtd_oob_ops ops; | |
282 | ||
0612b9dd | 283 | ops.mode = MTD_OPS_RAW; |
f1a28c02 TG |
284 | ops.datbuf = kbuf; |
285 | ops.oobbuf = NULL; | |
bf514081 | 286 | ops.ooboffs = 0; |
f1a28c02 TG |
287 | ops.len = len; |
288 | ||
a2cc5ba0 | 289 | ret = mtd_write_oob(mtd, *ppos, &ops); |
f1a28c02 TG |
290 | retlen = ops.retlen; |
291 | break; | |
292 | } | |
293 | ||
31f4233b | 294 | default: |
eda95cbf | 295 | ret = mtd_write(mtd, *ppos, len, &retlen, kbuf); |
31f4233b | 296 | } |
9a78bc83 CR |
297 | |
298 | /* | |
299 | * Return -ENOSPC only if no data could be written at all. | |
300 | * Otherwise just return the number of bytes that actually | |
301 | * have been written. | |
302 | */ | |
303 | if ((ret == -ENOSPC) && (total_retlen)) | |
304 | break; | |
305 | ||
1da177e4 LT |
306 | if (!ret) { |
307 | *ppos += retlen; | |
308 | total_retlen += retlen; | |
309 | count -= retlen; | |
310 | buf += retlen; | |
311 | } | |
312 | else { | |
313 | kfree(kbuf); | |
314 | return ret; | |
315 | } | |
1da177e4 LT |
316 | } |
317 | ||
b802c074 | 318 | kfree(kbuf); |
1da177e4 | 319 | return total_retlen; |
969e57ad | 320 | } /* mtdchar_write */ |
1da177e4 LT |
321 | |
322 | /*====================================================================== | |
323 | ||
324 | IOCTL calls for getting device parameters. | |
325 | ||
326 | ======================================================================*/ | |
327 | static void mtdchar_erase_callback (struct erase_info *instr) | |
328 | { | |
329 | wake_up((wait_queue_head_t *)instr->priv); | |
330 | } | |
331 | ||
f1a28c02 TG |
332 | static int otp_select_filemode(struct mtd_file_info *mfi, int mode) |
333 | { | |
334 | struct mtd_info *mtd = mfi->mtd; | |
b6de3d6c | 335 | size_t retlen; |
b6de3d6c | 336 | |
f1a28c02 TG |
337 | switch (mode) { |
338 | case MTD_OTP_FACTORY: | |
5dc63fa2 UKK |
339 | if (mtd_read_fact_prot_reg(mtd, -1, 0, &retlen, NULL) == |
340 | -EOPNOTSUPP) | |
341 | return -EOPNOTSUPP; | |
342 | ||
b6de3d6c | 343 | mfi->mode = MTD_FILE_MODE_OTP_FACTORY; |
f1a28c02 TG |
344 | break; |
345 | case MTD_OTP_USER: | |
5dc63fa2 UKK |
346 | if (mtd_read_user_prot_reg(mtd, -1, 0, &retlen, NULL) == |
347 | -EOPNOTSUPP) | |
348 | return -EOPNOTSUPP; | |
349 | ||
b6de3d6c | 350 | mfi->mode = MTD_FILE_MODE_OTP_USER; |
f1a28c02 | 351 | break; |
f1a28c02 | 352 | case MTD_OTP_OFF: |
5dc63fa2 | 353 | mfi->mode = MTD_FILE_MODE_NORMAL; |
f1a28c02 | 354 | break; |
5dc63fa2 UKK |
355 | default: |
356 | return -EINVAL; | |
f1a28c02 | 357 | } |
5dc63fa2 UKK |
358 | |
359 | return 0; | |
f1a28c02 | 360 | } |
f1a28c02 | 361 | |
969e57ad | 362 | static int mtdchar_writeoob(struct file *file, struct mtd_info *mtd, |
97718540 KC |
363 | uint64_t start, uint32_t length, void __user *ptr, |
364 | uint32_t __user *retp) | |
365 | { | |
9ce244b3 | 366 | struct mtd_file_info *mfi = file->private_data; |
97718540 KC |
367 | struct mtd_oob_ops ops; |
368 | uint32_t retlen; | |
369 | int ret = 0; | |
370 | ||
371 | if (!(file->f_mode & FMODE_WRITE)) | |
372 | return -EPERM; | |
373 | ||
374 | if (length > 4096) | |
375 | return -EINVAL; | |
376 | ||
3c3c10bb | 377 | if (!mtd->_write_oob) |
97718540 KC |
378 | ret = -EOPNOTSUPP; |
379 | else | |
0040476b | 380 | ret = access_ok(VERIFY_READ, ptr, length) ? 0 : -EFAULT; |
97718540 KC |
381 | |
382 | if (ret) | |
383 | return ret; | |
384 | ||
385 | ops.ooblen = length; | |
305b93f1 | 386 | ops.ooboffs = start & (mtd->writesize - 1); |
97718540 | 387 | ops.datbuf = NULL; |
beb133fc | 388 | ops.mode = (mfi->mode == MTD_FILE_MODE_RAW) ? MTD_OPS_RAW : |
0612b9dd | 389 | MTD_OPS_PLACE_OOB; |
97718540 KC |
390 | |
391 | if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs)) | |
392 | return -EINVAL; | |
393 | ||
df1f1d1c JL |
394 | ops.oobbuf = memdup_user(ptr, length); |
395 | if (IS_ERR(ops.oobbuf)) | |
396 | return PTR_ERR(ops.oobbuf); | |
97718540 | 397 | |
305b93f1 | 398 | start &= ~((uint64_t)mtd->writesize - 1); |
a2cc5ba0 | 399 | ret = mtd_write_oob(mtd, start, &ops); |
97718540 KC |
400 | |
401 | if (ops.oobretlen > 0xFFFFFFFFU) | |
402 | ret = -EOVERFLOW; | |
403 | retlen = ops.oobretlen; | |
404 | if (copy_to_user(retp, &retlen, sizeof(length))) | |
405 | ret = -EFAULT; | |
406 | ||
407 | kfree(ops.oobbuf); | |
408 | return ret; | |
409 | } | |
410 | ||
969e57ad | 411 | static int mtdchar_readoob(struct file *file, struct mtd_info *mtd, |
c46f6483 BN |
412 | uint64_t start, uint32_t length, void __user *ptr, |
413 | uint32_t __user *retp) | |
97718540 | 414 | { |
c46f6483 | 415 | struct mtd_file_info *mfi = file->private_data; |
97718540 KC |
416 | struct mtd_oob_ops ops; |
417 | int ret = 0; | |
418 | ||
419 | if (length > 4096) | |
420 | return -EINVAL; | |
421 | ||
dac2639f AB |
422 | if (!access_ok(VERIFY_WRITE, ptr, length)) |
423 | return -EFAULT; | |
97718540 KC |
424 | |
425 | ops.ooblen = length; | |
305b93f1 | 426 | ops.ooboffs = start & (mtd->writesize - 1); |
97718540 | 427 | ops.datbuf = NULL; |
beb133fc | 428 | ops.mode = (mfi->mode == MTD_FILE_MODE_RAW) ? MTD_OPS_RAW : |
0612b9dd | 429 | MTD_OPS_PLACE_OOB; |
97718540 KC |
430 | |
431 | if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs)) | |
432 | return -EINVAL; | |
433 | ||
434 | ops.oobbuf = kmalloc(length, GFP_KERNEL); | |
435 | if (!ops.oobbuf) | |
436 | return -ENOMEM; | |
437 | ||
305b93f1 | 438 | start &= ~((uint64_t)mtd->writesize - 1); |
fd2819bb | 439 | ret = mtd_read_oob(mtd, start, &ops); |
97718540 KC |
440 | |
441 | if (put_user(ops.oobretlen, retp)) | |
442 | ret = -EFAULT; | |
443 | else if (ops.oobretlen && copy_to_user(ptr, ops.oobbuf, | |
444 | ops.oobretlen)) | |
445 | ret = -EFAULT; | |
446 | ||
447 | kfree(ops.oobbuf); | |
041e4575 BN |
448 | |
449 | /* | |
450 | * NAND returns -EBADMSG on ECC errors, but it returns the OOB | |
451 | * data. For our userspace tools it is important to dump areas | |
452 | * with ECC errors! | |
453 | * For kernel internal usage it also might return -EUCLEAN | |
454 | * to signal the caller that a bitflip has occured and has | |
455 | * been corrected by the ECC algorithm. | |
456 | * | |
c478d7e4 BN |
457 | * Note: currently the standard NAND function, nand_read_oob_std, |
458 | * does not calculate ECC for the OOB area, so do not rely on | |
459 | * this behavior unless you have replaced it with your own. | |
041e4575 | 460 | */ |
d57f4054 | 461 | if (mtd_is_bitflip_or_eccerr(ret)) |
041e4575 BN |
462 | return 0; |
463 | ||
97718540 KC |
464 | return ret; |
465 | } | |
466 | ||
cc26c3cd | 467 | /* |
aab616e3 BB |
468 | * Copies (and truncates, if necessary) OOB layout information to the |
469 | * deprecated layout struct, nand_ecclayout_user. This is necessary only to | |
470 | * support the deprecated API ioctl ECCGETLAYOUT while allowing all new | |
471 | * functionality to use mtd_ooblayout_ops flexibly (i.e. mtd_ooblayout_ops | |
472 | * can describe any kind of OOB layout with almost zero overhead from a | |
473 | * memory usage point of view). | |
cc26c3cd | 474 | */ |
c2b78452 BB |
475 | static int shrink_ecclayout(struct mtd_info *mtd, |
476 | struct nand_ecclayout_user *to) | |
cc26c3cd | 477 | { |
c2b78452 BB |
478 | struct mtd_oob_region oobregion; |
479 | int i, section = 0, ret; | |
cc26c3cd | 480 | |
c2b78452 | 481 | if (!mtd || !to) |
cc26c3cd BN |
482 | return -EINVAL; |
483 | ||
484 | memset(to, 0, sizeof(*to)); | |
485 | ||
c2b78452 BB |
486 | to->eccbytes = 0; |
487 | for (i = 0; i < MTD_MAX_ECCPOS_ENTRIES;) { | |
488 | u32 eccpos; | |
489 | ||
490 | ret = mtd_ooblayout_ecc(mtd, section, &oobregion); | |
491 | if (ret < 0) { | |
492 | if (ret != -ERANGE) | |
493 | return ret; | |
494 | ||
495 | break; | |
496 | } | |
497 | ||
498 | eccpos = oobregion.offset; | |
499 | for (; i < MTD_MAX_ECCPOS_ENTRIES && | |
500 | eccpos < oobregion.offset + oobregion.length; i++) { | |
501 | to->eccpos[i] = eccpos++; | |
502 | to->eccbytes++; | |
503 | } | |
504 | } | |
cc26c3cd BN |
505 | |
506 | for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES; i++) { | |
c2b78452 BB |
507 | ret = mtd_ooblayout_free(mtd, i, &oobregion); |
508 | if (ret < 0) { | |
509 | if (ret != -ERANGE) | |
510 | return ret; | |
511 | ||
512 | break; | |
513 | } | |
514 | ||
515 | to->oobfree[i].offset = oobregion.offset; | |
516 | to->oobfree[i].length = oobregion.length; | |
517 | to->oobavail += to->oobfree[i].length; | |
518 | } | |
519 | ||
520 | return 0; | |
521 | } | |
522 | ||
523 | static int get_oobinfo(struct mtd_info *mtd, struct nand_oobinfo *to) | |
524 | { | |
525 | struct mtd_oob_region oobregion; | |
526 | int i, section = 0, ret; | |
527 | ||
528 | if (!mtd || !to) | |
529 | return -EINVAL; | |
530 | ||
531 | memset(to, 0, sizeof(*to)); | |
532 | ||
533 | to->eccbytes = 0; | |
534 | for (i = 0; i < ARRAY_SIZE(to->eccpos);) { | |
535 | u32 eccpos; | |
536 | ||
537 | ret = mtd_ooblayout_ecc(mtd, section, &oobregion); | |
538 | if (ret < 0) { | |
539 | if (ret != -ERANGE) | |
540 | return ret; | |
541 | ||
cc26c3cd | 542 | break; |
c2b78452 BB |
543 | } |
544 | ||
545 | if (oobregion.length + i > ARRAY_SIZE(to->eccpos)) | |
546 | return -EINVAL; | |
547 | ||
548 | eccpos = oobregion.offset; | |
549 | for (; eccpos < oobregion.offset + oobregion.length; i++) { | |
550 | to->eccpos[i] = eccpos++; | |
551 | to->eccbytes++; | |
552 | } | |
cc26c3cd BN |
553 | } |
554 | ||
c2b78452 BB |
555 | for (i = 0; i < 8; i++) { |
556 | ret = mtd_ooblayout_free(mtd, i, &oobregion); | |
557 | if (ret < 0) { | |
558 | if (ret != -ERANGE) | |
559 | return ret; | |
560 | ||
561 | break; | |
562 | } | |
563 | ||
564 | to->oobfree[i][0] = oobregion.offset; | |
565 | to->oobfree[i][1] = oobregion.length; | |
566 | } | |
567 | ||
568 | to->useecc = MTD_NANDECC_AUTOPLACE; | |
569 | ||
cc26c3cd BN |
570 | return 0; |
571 | } | |
572 | ||
969e57ad | 573 | static int mtdchar_blkpg_ioctl(struct mtd_info *mtd, |
53bb724f | 574 | struct blkpg_ioctl_arg *arg) |
d0f7959e | 575 | { |
d0f7959e RT |
576 | struct blkpg_partition p; |
577 | ||
578 | if (!capable(CAP_SYS_ADMIN)) | |
579 | return -EPERM; | |
580 | ||
53bb724f | 581 | if (copy_from_user(&p, arg->data, sizeof(p))) |
d0f7959e RT |
582 | return -EFAULT; |
583 | ||
53bb724f | 584 | switch (arg->op) { |
d0f7959e RT |
585 | case BLKPG_ADD_PARTITION: |
586 | ||
a7e93dcd RT |
587 | /* Only master mtd device must be used to add partitions */ |
588 | if (mtd_is_partition(mtd)) | |
589 | return -EINVAL; | |
590 | ||
1cc8d841 BN |
591 | /* Sanitize user input */ |
592 | p.devname[BLKPG_DEVNAMELTH - 1] = '\0'; | |
593 | ||
d0f7959e RT |
594 | return mtd_add_partition(mtd, p.devname, p.start, p.length); |
595 | ||
596 | case BLKPG_DEL_PARTITION: | |
597 | ||
598 | if (p.pno < 0) | |
599 | return -EINVAL; | |
600 | ||
601 | return mtd_del_partition(mtd, p.pno); | |
602 | ||
603 | default: | |
604 | return -EINVAL; | |
605 | } | |
606 | } | |
d0f7959e | 607 | |
969e57ad | 608 | static int mtdchar_write_ioctl(struct mtd_info *mtd, |
e99d8b08 BN |
609 | struct mtd_write_req __user *argp) |
610 | { | |
611 | struct mtd_write_req req; | |
612 | struct mtd_oob_ops ops; | |
f62cde49 | 613 | const void __user *usr_data, *usr_oob; |
e99d8b08 BN |
614 | int ret; |
615 | ||
f62cde49 | 616 | if (copy_from_user(&req, argp, sizeof(req))) |
e99d8b08 | 617 | return -EFAULT; |
f62cde49 GU |
618 | |
619 | usr_data = (const void __user *)(uintptr_t)req.usr_data; | |
620 | usr_oob = (const void __user *)(uintptr_t)req.usr_oob; | |
621 | if (!access_ok(VERIFY_READ, usr_data, req.len) || | |
622 | !access_ok(VERIFY_READ, usr_oob, req.ooblen)) | |
623 | return -EFAULT; | |
624 | ||
3c3c10bb | 625 | if (!mtd->_write_oob) |
e99d8b08 BN |
626 | return -EOPNOTSUPP; |
627 | ||
628 | ops.mode = req.mode; | |
629 | ops.len = (size_t)req.len; | |
630 | ops.ooblen = (size_t)req.ooblen; | |
631 | ops.ooboffs = 0; | |
632 | ||
f62cde49 | 633 | if (usr_data) { |
e99d8b08 BN |
634 | ops.datbuf = memdup_user(usr_data, ops.len); |
635 | if (IS_ERR(ops.datbuf)) | |
636 | return PTR_ERR(ops.datbuf); | |
637 | } else { | |
638 | ops.datbuf = NULL; | |
639 | } | |
640 | ||
f62cde49 | 641 | if (usr_oob) { |
e99d8b08 BN |
642 | ops.oobbuf = memdup_user(usr_oob, ops.ooblen); |
643 | if (IS_ERR(ops.oobbuf)) { | |
644 | kfree(ops.datbuf); | |
645 | return PTR_ERR(ops.oobbuf); | |
646 | } | |
647 | } else { | |
648 | ops.oobbuf = NULL; | |
649 | } | |
650 | ||
a2cc5ba0 | 651 | ret = mtd_write_oob(mtd, (loff_t)req.start, &ops); |
e99d8b08 BN |
652 | |
653 | kfree(ops.datbuf); | |
654 | kfree(ops.oobbuf); | |
655 | ||
656 | return ret; | |
657 | } | |
658 | ||
969e57ad | 659 | static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg) |
1da177e4 | 660 | { |
f1a28c02 TG |
661 | struct mtd_file_info *mfi = file->private_data; |
662 | struct mtd_info *mtd = mfi->mtd; | |
1da177e4 LT |
663 | void __user *argp = (void __user *)arg; |
664 | int ret = 0; | |
665 | u_long size; | |
73c619ea | 666 | struct mtd_info_user info; |
97894cda | 667 | |
289c0522 | 668 | pr_debug("MTD_ioctl\n"); |
1da177e4 LT |
669 | |
670 | size = (cmd & IOCSIZE_MASK) >> IOCSIZE_SHIFT; | |
671 | if (cmd & IOC_IN) { | |
672 | if (!access_ok(VERIFY_READ, argp, size)) | |
673 | return -EFAULT; | |
674 | } | |
675 | if (cmd & IOC_OUT) { | |
676 | if (!access_ok(VERIFY_WRITE, argp, size)) | |
677 | return -EFAULT; | |
678 | } | |
97894cda | 679 | |
1da177e4 LT |
680 | switch (cmd) { |
681 | case MEMGETREGIONCOUNT: | |
682 | if (copy_to_user(argp, &(mtd->numeraseregions), sizeof(int))) | |
683 | return -EFAULT; | |
684 | break; | |
685 | ||
686 | case MEMGETREGIONINFO: | |
687 | { | |
b67c5f87 ZW |
688 | uint32_t ur_idx; |
689 | struct mtd_erase_region_info *kr; | |
bcc98a46 | 690 | struct region_info_user __user *ur = argp; |
1da177e4 | 691 | |
b67c5f87 | 692 | if (get_user(ur_idx, &(ur->regionindex))) |
1da177e4 LT |
693 | return -EFAULT; |
694 | ||
5e59be1f DC |
695 | if (ur_idx >= mtd->numeraseregions) |
696 | return -EINVAL; | |
697 | ||
b67c5f87 ZW |
698 | kr = &(mtd->eraseregions[ur_idx]); |
699 | ||
700 | if (put_user(kr->offset, &(ur->offset)) | |
701 | || put_user(kr->erasesize, &(ur->erasesize)) | |
702 | || put_user(kr->numblocks, &(ur->numblocks))) | |
1da177e4 | 703 | return -EFAULT; |
b67c5f87 | 704 | |
1da177e4 LT |
705 | break; |
706 | } | |
707 | ||
708 | case MEMGETINFO: | |
a0c5a394 | 709 | memset(&info, 0, sizeof(info)); |
73c619ea JE |
710 | info.type = mtd->type; |
711 | info.flags = mtd->flags; | |
712 | info.size = mtd->size; | |
713 | info.erasesize = mtd->erasesize; | |
714 | info.writesize = mtd->writesize; | |
715 | info.oobsize = mtd->oobsize; | |
19fb4341 BN |
716 | /* The below field is obsolete */ |
717 | info.padding = 0; | |
73c619ea | 718 | if (copy_to_user(argp, &info, sizeof(struct mtd_info_user))) |
1da177e4 LT |
719 | return -EFAULT; |
720 | break; | |
721 | ||
722 | case MEMERASE: | |
0dc54e9f | 723 | case MEMERASE64: |
1da177e4 LT |
724 | { |
725 | struct erase_info *erase; | |
726 | ||
aeb5d727 | 727 | if(!(file->f_mode & FMODE_WRITE)) |
1da177e4 LT |
728 | return -EPERM; |
729 | ||
95b93a0c | 730 | erase=kzalloc(sizeof(struct erase_info),GFP_KERNEL); |
1da177e4 LT |
731 | if (!erase) |
732 | ret = -ENOMEM; | |
733 | else { | |
734 | wait_queue_head_t waitq; | |
735 | DECLARE_WAITQUEUE(wait, current); | |
736 | ||
737 | init_waitqueue_head(&waitq); | |
738 | ||
0dc54e9f KC |
739 | if (cmd == MEMERASE64) { |
740 | struct erase_info_user64 einfo64; | |
741 | ||
742 | if (copy_from_user(&einfo64, argp, | |
743 | sizeof(struct erase_info_user64))) { | |
744 | kfree(erase); | |
745 | return -EFAULT; | |
746 | } | |
747 | erase->addr = einfo64.start; | |
748 | erase->len = einfo64.length; | |
749 | } else { | |
750 | struct erase_info_user einfo32; | |
751 | ||
752 | if (copy_from_user(&einfo32, argp, | |
753 | sizeof(struct erase_info_user))) { | |
754 | kfree(erase); | |
755 | return -EFAULT; | |
756 | } | |
757 | erase->addr = einfo32.start; | |
758 | erase->len = einfo32.length; | |
1da177e4 LT |
759 | } |
760 | erase->mtd = mtd; | |
761 | erase->callback = mtdchar_erase_callback; | |
762 | erase->priv = (unsigned long)&waitq; | |
97894cda | 763 | |
1da177e4 LT |
764 | /* |
765 | FIXME: Allow INTERRUPTIBLE. Which means | |
766 | not having the wait_queue head on the stack. | |
97894cda | 767 | |
1da177e4 LT |
768 | If the wq_head is on the stack, and we |
769 | leave because we got interrupted, then the | |
770 | wq_head is no longer there when the | |
771 | callback routine tries to wake us up. | |
772 | */ | |
7e1f0dc0 | 773 | ret = mtd_erase(mtd, erase); |
1da177e4 LT |
774 | if (!ret) { |
775 | set_current_state(TASK_UNINTERRUPTIBLE); | |
776 | add_wait_queue(&waitq, &wait); | |
777 | if (erase->state != MTD_ERASE_DONE && | |
778 | erase->state != MTD_ERASE_FAILED) | |
779 | schedule(); | |
780 | remove_wait_queue(&waitq, &wait); | |
781 | set_current_state(TASK_RUNNING); | |
782 | ||
783 | ret = (erase->state == MTD_ERASE_FAILED)?-EIO:0; | |
784 | } | |
785 | kfree(erase); | |
786 | } | |
787 | break; | |
788 | } | |
789 | ||
790 | case MEMWRITEOOB: | |
791 | { | |
792 | struct mtd_oob_buf buf; | |
97718540 | 793 | struct mtd_oob_buf __user *buf_user = argp; |
1da177e4 | 794 | |
97718540 KC |
795 | /* NOTE: writes return length to buf_user->length */ |
796 | if (copy_from_user(&buf, argp, sizeof(buf))) | |
1da177e4 | 797 | ret = -EFAULT; |
97718540 | 798 | else |
969e57ad | 799 | ret = mtdchar_writeoob(file, mtd, buf.start, buf.length, |
97718540 | 800 | buf.ptr, &buf_user->length); |
1da177e4 | 801 | break; |
1da177e4 LT |
802 | } |
803 | ||
804 | case MEMREADOOB: | |
805 | { | |
806 | struct mtd_oob_buf buf; | |
97718540 | 807 | struct mtd_oob_buf __user *buf_user = argp; |
8593fbc6 | 808 | |
97718540 KC |
809 | /* NOTE: writes return length to buf_user->start */ |
810 | if (copy_from_user(&buf, argp, sizeof(buf))) | |
1da177e4 | 811 | ret = -EFAULT; |
97718540 | 812 | else |
969e57ad | 813 | ret = mtdchar_readoob(file, mtd, buf.start, buf.length, |
97718540 | 814 | buf.ptr, &buf_user->start); |
1da177e4 LT |
815 | break; |
816 | } | |
817 | ||
aea7cea9 KC |
818 | case MEMWRITEOOB64: |
819 | { | |
820 | struct mtd_oob_buf64 buf; | |
821 | struct mtd_oob_buf64 __user *buf_user = argp; | |
822 | ||
823 | if (copy_from_user(&buf, argp, sizeof(buf))) | |
824 | ret = -EFAULT; | |
825 | else | |
969e57ad | 826 | ret = mtdchar_writeoob(file, mtd, buf.start, buf.length, |
aea7cea9 KC |
827 | (void __user *)(uintptr_t)buf.usr_ptr, |
828 | &buf_user->length); | |
829 | break; | |
830 | } | |
831 | ||
832 | case MEMREADOOB64: | |
833 | { | |
834 | struct mtd_oob_buf64 buf; | |
835 | struct mtd_oob_buf64 __user *buf_user = argp; | |
836 | ||
837 | if (copy_from_user(&buf, argp, sizeof(buf))) | |
838 | ret = -EFAULT; | |
839 | else | |
969e57ad | 840 | ret = mtdchar_readoob(file, mtd, buf.start, buf.length, |
aea7cea9 KC |
841 | (void __user *)(uintptr_t)buf.usr_ptr, |
842 | &buf_user->length); | |
843 | break; | |
844 | } | |
845 | ||
e99d8b08 BN |
846 | case MEMWRITE: |
847 | { | |
969e57ad | 848 | ret = mtdchar_write_ioctl(mtd, |
e99d8b08 BN |
849 | (struct mtd_write_req __user *)arg); |
850 | break; | |
851 | } | |
852 | ||
1da177e4 LT |
853 | case MEMLOCK: |
854 | { | |
175428b2 | 855 | struct erase_info_user einfo; |
1da177e4 | 856 | |
175428b2 | 857 | if (copy_from_user(&einfo, argp, sizeof(einfo))) |
1da177e4 LT |
858 | return -EFAULT; |
859 | ||
38134565 | 860 | ret = mtd_lock(mtd, einfo.start, einfo.length); |
1da177e4 LT |
861 | break; |
862 | } | |
863 | ||
864 | case MEMUNLOCK: | |
865 | { | |
175428b2 | 866 | struct erase_info_user einfo; |
1da177e4 | 867 | |
175428b2 | 868 | if (copy_from_user(&einfo, argp, sizeof(einfo))) |
1da177e4 LT |
869 | return -EFAULT; |
870 | ||
38134565 | 871 | ret = mtd_unlock(mtd, einfo.start, einfo.length); |
1da177e4 LT |
872 | break; |
873 | } | |
874 | ||
9938424f RC |
875 | case MEMISLOCKED: |
876 | { | |
877 | struct erase_info_user einfo; | |
878 | ||
879 | if (copy_from_user(&einfo, argp, sizeof(einfo))) | |
880 | return -EFAULT; | |
881 | ||
38134565 | 882 | ret = mtd_is_locked(mtd, einfo.start, einfo.length); |
9938424f RC |
883 | break; |
884 | } | |
885 | ||
5bd34c09 | 886 | /* Legacy interface */ |
1da177e4 LT |
887 | case MEMGETOOBSEL: |
888 | { | |
5bd34c09 TG |
889 | struct nand_oobinfo oi; |
890 | ||
adbbc3bc | 891 | if (!mtd->ooblayout) |
5bd34c09 | 892 | return -EOPNOTSUPP; |
5bd34c09 | 893 | |
c2b78452 BB |
894 | ret = get_oobinfo(mtd, &oi); |
895 | if (ret) | |
896 | return ret; | |
5bd34c09 TG |
897 | |
898 | if (copy_to_user(argp, &oi, sizeof(struct nand_oobinfo))) | |
1da177e4 LT |
899 | return -EFAULT; |
900 | break; | |
901 | } | |
902 | ||
903 | case MEMGETBADBLOCK: | |
904 | { | |
905 | loff_t offs; | |
97894cda | 906 | |
1da177e4 LT |
907 | if (copy_from_user(&offs, argp, sizeof(loff_t))) |
908 | return -EFAULT; | |
8f461a73 | 909 | return mtd_block_isbad(mtd, offs); |
1da177e4 LT |
910 | break; |
911 | } | |
912 | ||
913 | case MEMSETBADBLOCK: | |
914 | { | |
915 | loff_t offs; | |
916 | ||
917 | if (copy_from_user(&offs, argp, sizeof(loff_t))) | |
918 | return -EFAULT; | |
800ffd34 | 919 | return mtd_block_markbad(mtd, offs); |
1da177e4 LT |
920 | break; |
921 | } | |
922 | ||
31f4233b NP |
923 | case OTPSELECT: |
924 | { | |
925 | int mode; | |
926 | if (copy_from_user(&mode, argp, sizeof(int))) | |
927 | return -EFAULT; | |
f1a28c02 | 928 | |
beb133fc | 929 | mfi->mode = MTD_FILE_MODE_NORMAL; |
f1a28c02 TG |
930 | |
931 | ret = otp_select_filemode(mfi, mode); | |
932 | ||
81dba488 | 933 | file->f_pos = 0; |
31f4233b NP |
934 | break; |
935 | } | |
936 | ||
937 | case OTPGETREGIONCOUNT: | |
938 | case OTPGETREGIONINFO: | |
939 | { | |
940 | struct otp_info *buf = kmalloc(4096, GFP_KERNEL); | |
4b78fc42 | 941 | size_t retlen; |
31f4233b NP |
942 | if (!buf) |
943 | return -ENOMEM; | |
f1a28c02 | 944 | switch (mfi->mode) { |
beb133fc | 945 | case MTD_FILE_MODE_OTP_FACTORY: |
4b78fc42 | 946 | ret = mtd_get_fact_prot_info(mtd, 4096, &retlen, buf); |
31f4233b | 947 | break; |
beb133fc | 948 | case MTD_FILE_MODE_OTP_USER: |
4b78fc42 | 949 | ret = mtd_get_user_prot_info(mtd, 4096, &retlen, buf); |
31f4233b | 950 | break; |
f1a28c02 | 951 | default: |
87e858a9 | 952 | ret = -EINVAL; |
f1a28c02 | 953 | break; |
31f4233b | 954 | } |
4b78fc42 | 955 | if (!ret) { |
31f4233b | 956 | if (cmd == OTPGETREGIONCOUNT) { |
4b78fc42 | 957 | int nbr = retlen / sizeof(struct otp_info); |
31f4233b NP |
958 | ret = copy_to_user(argp, &nbr, sizeof(int)); |
959 | } else | |
4b78fc42 | 960 | ret = copy_to_user(argp, buf, retlen); |
31f4233b NP |
961 | if (ret) |
962 | ret = -EFAULT; | |
963 | } | |
964 | kfree(buf); | |
965 | break; | |
966 | } | |
967 | ||
968 | case OTPLOCK: | |
969 | { | |
175428b2 | 970 | struct otp_info oinfo; |
31f4233b | 971 | |
beb133fc | 972 | if (mfi->mode != MTD_FILE_MODE_OTP_USER) |
31f4233b | 973 | return -EINVAL; |
175428b2 | 974 | if (copy_from_user(&oinfo, argp, sizeof(oinfo))) |
31f4233b | 975 | return -EFAULT; |
4403dbfb | 976 | ret = mtd_lock_user_prot_reg(mtd, oinfo.start, oinfo.length); |
31f4233b NP |
977 | break; |
978 | } | |
31f4233b | 979 | |
7854d3f7 | 980 | /* This ioctl is being deprecated - it truncates the ECC layout */ |
f1a28c02 TG |
981 | case ECCGETLAYOUT: |
982 | { | |
cc26c3cd BN |
983 | struct nand_ecclayout_user *usrlay; |
984 | ||
adbbc3bc | 985 | if (!mtd->ooblayout) |
f1a28c02 TG |
986 | return -EOPNOTSUPP; |
987 | ||
cc26c3cd BN |
988 | usrlay = kmalloc(sizeof(*usrlay), GFP_KERNEL); |
989 | if (!usrlay) | |
990 | return -ENOMEM; | |
991 | ||
c2b78452 | 992 | shrink_ecclayout(mtd, usrlay); |
cc26c3cd BN |
993 | |
994 | if (copy_to_user(argp, usrlay, sizeof(*usrlay))) | |
995 | ret = -EFAULT; | |
996 | kfree(usrlay); | |
f1a28c02 TG |
997 | break; |
998 | } | |
999 | ||
1000 | case ECCGETSTATS: | |
1001 | { | |
1002 | if (copy_to_user(argp, &mtd->ecc_stats, | |
1003 | sizeof(struct mtd_ecc_stats))) | |
1004 | return -EFAULT; | |
1005 | break; | |
1006 | } | |
1007 | ||
1008 | case MTDFILEMODE: | |
1009 | { | |
1010 | mfi->mode = 0; | |
1011 | ||
1012 | switch(arg) { | |
beb133fc BN |
1013 | case MTD_FILE_MODE_OTP_FACTORY: |
1014 | case MTD_FILE_MODE_OTP_USER: | |
f1a28c02 TG |
1015 | ret = otp_select_filemode(mfi, arg); |
1016 | break; | |
1017 | ||
beb133fc | 1018 | case MTD_FILE_MODE_RAW: |
fc002e3c | 1019 | if (!mtd_has_oob(mtd)) |
f1a28c02 TG |
1020 | return -EOPNOTSUPP; |
1021 | mfi->mode = arg; | |
1022 | ||
beb133fc | 1023 | case MTD_FILE_MODE_NORMAL: |
f1a28c02 TG |
1024 | break; |
1025 | default: | |
1026 | ret = -EINVAL; | |
1027 | } | |
1028 | file->f_pos = 0; | |
1029 | break; | |
1030 | } | |
1031 | ||
d0f7959e RT |
1032 | case BLKPG: |
1033 | { | |
53bb724f BN |
1034 | struct blkpg_ioctl_arg __user *blk_arg = argp; |
1035 | struct blkpg_ioctl_arg a; | |
1036 | ||
1037 | if (copy_from_user(&a, blk_arg, sizeof(a))) | |
1038 | ret = -EFAULT; | |
1039 | else | |
1040 | ret = mtdchar_blkpg_ioctl(mtd, &a); | |
d0f7959e RT |
1041 | break; |
1042 | } | |
1043 | ||
1044 | case BLKRRPART: | |
1045 | { | |
1046 | /* No reread partition feature. Just return ok */ | |
1047 | ret = 0; | |
1048 | break; | |
1049 | } | |
d0f7959e | 1050 | |
1da177e4 LT |
1051 | default: |
1052 | ret = -ENOTTY; | |
1053 | } | |
1054 | ||
1055 | return ret; | |
1056 | } /* memory_ioctl */ | |
1057 | ||
969e57ad | 1058 | static long mtdchar_unlocked_ioctl(struct file *file, u_int cmd, u_long arg) |
55929332 AB |
1059 | { |
1060 | int ret; | |
1061 | ||
5aa82940 | 1062 | mutex_lock(&mtd_mutex); |
969e57ad | 1063 | ret = mtdchar_ioctl(file, cmd, arg); |
5aa82940 | 1064 | mutex_unlock(&mtd_mutex); |
55929332 AB |
1065 | |
1066 | return ret; | |
1067 | } | |
1068 | ||
97718540 KC |
1069 | #ifdef CONFIG_COMPAT |
1070 | ||
1071 | struct mtd_oob_buf32 { | |
1072 | u_int32_t start; | |
1073 | u_int32_t length; | |
1074 | compat_caddr_t ptr; /* unsigned char* */ | |
1075 | }; | |
1076 | ||
1077 | #define MEMWRITEOOB32 _IOWR('M', 3, struct mtd_oob_buf32) | |
1078 | #define MEMREADOOB32 _IOWR('M', 4, struct mtd_oob_buf32) | |
1079 | ||
969e57ad | 1080 | static long mtdchar_compat_ioctl(struct file *file, unsigned int cmd, |
97718540 KC |
1081 | unsigned long arg) |
1082 | { | |
1083 | struct mtd_file_info *mfi = file->private_data; | |
1084 | struct mtd_info *mtd = mfi->mtd; | |
0b6585ce | 1085 | void __user *argp = compat_ptr(arg); |
97718540 KC |
1086 | int ret = 0; |
1087 | ||
5aa82940 | 1088 | mutex_lock(&mtd_mutex); |
97718540 KC |
1089 | |
1090 | switch (cmd) { | |
1091 | case MEMWRITEOOB32: | |
1092 | { | |
1093 | struct mtd_oob_buf32 buf; | |
1094 | struct mtd_oob_buf32 __user *buf_user = argp; | |
1095 | ||
1096 | if (copy_from_user(&buf, argp, sizeof(buf))) | |
1097 | ret = -EFAULT; | |
1098 | else | |
969e57ad | 1099 | ret = mtdchar_writeoob(file, mtd, buf.start, |
97718540 KC |
1100 | buf.length, compat_ptr(buf.ptr), |
1101 | &buf_user->length); | |
1102 | break; | |
1103 | } | |
1104 | ||
1105 | case MEMREADOOB32: | |
1106 | { | |
1107 | struct mtd_oob_buf32 buf; | |
1108 | struct mtd_oob_buf32 __user *buf_user = argp; | |
1109 | ||
1110 | /* NOTE: writes return length to buf->start */ | |
1111 | if (copy_from_user(&buf, argp, sizeof(buf))) | |
1112 | ret = -EFAULT; | |
1113 | else | |
969e57ad | 1114 | ret = mtdchar_readoob(file, mtd, buf.start, |
97718540 KC |
1115 | buf.length, compat_ptr(buf.ptr), |
1116 | &buf_user->start); | |
1117 | break; | |
1118 | } | |
53bb724f BN |
1119 | |
1120 | case BLKPG: | |
1121 | { | |
1122 | /* Convert from blkpg_compat_ioctl_arg to blkpg_ioctl_arg */ | |
1123 | struct blkpg_compat_ioctl_arg __user *uarg = argp; | |
1124 | struct blkpg_compat_ioctl_arg compat_arg; | |
1125 | struct blkpg_ioctl_arg a; | |
1126 | ||
1127 | if (copy_from_user(&compat_arg, uarg, sizeof(compat_arg))) { | |
1128 | ret = -EFAULT; | |
1129 | break; | |
1130 | } | |
1131 | ||
1132 | memset(&a, 0, sizeof(a)); | |
1133 | a.op = compat_arg.op; | |
1134 | a.flags = compat_arg.flags; | |
1135 | a.datalen = compat_arg.datalen; | |
1136 | a.data = compat_ptr(compat_arg.data); | |
1137 | ||
1138 | ret = mtdchar_blkpg_ioctl(mtd, &a); | |
1139 | break; | |
1140 | } | |
1141 | ||
97718540 | 1142 | default: |
969e57ad | 1143 | ret = mtdchar_ioctl(file, cmd, (unsigned long)argp); |
97718540 KC |
1144 | } |
1145 | ||
5aa82940 | 1146 | mutex_unlock(&mtd_mutex); |
97718540 KC |
1147 | |
1148 | return ret; | |
1149 | } | |
1150 | ||
1151 | #endif /* CONFIG_COMPAT */ | |
1152 | ||
402d3265 DH |
1153 | /* |
1154 | * try to determine where a shared mapping can be made | |
1155 | * - only supported for NOMMU at the moment (MMU can't doesn't copy private | |
1156 | * mappings) | |
1157 | */ | |
1158 | #ifndef CONFIG_MMU | |
969e57ad | 1159 | static unsigned long mtdchar_get_unmapped_area(struct file *file, |
402d3265 DH |
1160 | unsigned long addr, |
1161 | unsigned long len, | |
1162 | unsigned long pgoff, | |
1163 | unsigned long flags) | |
1164 | { | |
1165 | struct mtd_file_info *mfi = file->private_data; | |
1166 | struct mtd_info *mtd = mfi->mtd; | |
cd621274 AB |
1167 | unsigned long offset; |
1168 | int ret; | |
402d3265 | 1169 | |
cd621274 AB |
1170 | if (addr != 0) |
1171 | return (unsigned long) -EINVAL; | |
402d3265 | 1172 | |
cd621274 AB |
1173 | if (len > mtd->size || pgoff >= (mtd->size >> PAGE_SHIFT)) |
1174 | return (unsigned long) -EINVAL; | |
402d3265 | 1175 | |
cd621274 AB |
1176 | offset = pgoff << PAGE_SHIFT; |
1177 | if (offset > mtd->size - len) | |
1178 | return (unsigned long) -EINVAL; | |
402d3265 | 1179 | |
cd621274 | 1180 | ret = mtd_get_unmapped_area(mtd, len, offset, flags); |
b9995932 | 1181 | return ret == -EOPNOTSUPP ? -ENODEV : ret; |
402d3265 | 1182 | } |
b4caecd4 CH |
1183 | |
1184 | static unsigned mtdchar_mmap_capabilities(struct file *file) | |
1185 | { | |
1186 | struct mtd_file_info *mfi = file->private_data; | |
1187 | ||
1188 | return mtd_mmap_capabilities(mfi->mtd); | |
1189 | } | |
402d3265 DH |
1190 | #endif |
1191 | ||
1192 | /* | |
1193 | * set up a mapping for shared memory segments | |
1194 | */ | |
969e57ad | 1195 | static int mtdchar_mmap(struct file *file, struct vm_area_struct *vma) |
402d3265 DH |
1196 | { |
1197 | #ifdef CONFIG_MMU | |
1198 | struct mtd_file_info *mfi = file->private_data; | |
1199 | struct mtd_info *mtd = mfi->mtd; | |
dd02b67d | 1200 | struct map_info *map = mtd->priv; |
dd02b67d | 1201 | |
f5cf8f07 DW |
1202 | /* This is broken because it assumes the MTD device is map-based |
1203 | and that mtd->priv is a valid struct map_info. It should be | |
1204 | replaced with something that uses the mtd_get_unmapped_area() | |
1205 | operation properly. */ | |
1206 | if (0 /*mtd->type == MTD_RAM || mtd->type == MTD_ROM*/) { | |
dd02b67d | 1207 | #ifdef pgprot_noncached |
8558e4a2 | 1208 | if (file->f_flags & O_DSYNC || map->phys >= __pa(high_memory)) |
dd02b67d AG |
1209 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
1210 | #endif | |
8558e4a2 | 1211 | return vm_iomap_memory(vma, map->phys, map->size); |
dd02b67d | 1212 | } |
b9995932 | 1213 | return -ENODEV; |
402d3265 | 1214 | #else |
b9995932 | 1215 | return vma->vm_flags & VM_SHARED ? 0 : -EACCES; |
402d3265 DH |
1216 | #endif |
1217 | } | |
1218 | ||
d54b1fdb | 1219 | static const struct file_operations mtd_fops = { |
1da177e4 | 1220 | .owner = THIS_MODULE, |
969e57ad AB |
1221 | .llseek = mtdchar_lseek, |
1222 | .read = mtdchar_read, | |
1223 | .write = mtdchar_write, | |
1224 | .unlocked_ioctl = mtdchar_unlocked_ioctl, | |
97718540 | 1225 | #ifdef CONFIG_COMPAT |
969e57ad | 1226 | .compat_ioctl = mtdchar_compat_ioctl, |
97718540 | 1227 | #endif |
969e57ad AB |
1228 | .open = mtdchar_open, |
1229 | .release = mtdchar_close, | |
1230 | .mmap = mtdchar_mmap, | |
402d3265 | 1231 | #ifndef CONFIG_MMU |
969e57ad | 1232 | .get_unmapped_area = mtdchar_get_unmapped_area, |
b4caecd4 | 1233 | .mmap_capabilities = mtdchar_mmap_capabilities, |
402d3265 | 1234 | #endif |
1da177e4 LT |
1235 | }; |
1236 | ||
660685d9 | 1237 | int __init init_mtdchar(void) |
1da177e4 | 1238 | { |
cd874237 | 1239 | int ret; |
1f24b5a8 | 1240 | |
cd874237 | 1241 | ret = __register_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, |
dad0db31 | 1242 | "mtd", &mtd_fops); |
cd874237 | 1243 | if (ret < 0) { |
57ae2b60 AB |
1244 | pr_err("Can't allocate major number %d for MTD\n", |
1245 | MTD_CHAR_MAJOR); | |
cd874237 | 1246 | return ret; |
9bc7b387 TP |
1247 | } |
1248 | ||
cd874237 | 1249 | return ret; |
1da177e4 LT |
1250 | } |
1251 | ||
660685d9 | 1252 | void __exit cleanup_mtdchar(void) |
1da177e4 | 1253 | { |
dad0db31 | 1254 | __unregister_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, "mtd"); |
1da177e4 LT |
1255 | } |
1256 | ||
90160e13 | 1257 | MODULE_ALIAS_CHARDEV_MAJOR(MTD_CHAR_MAJOR); |