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Commit | Line | Data |
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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 | |
7c0f6ba6 | 40 | #include <linux/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) |
0db188f9 | 378 | return -EOPNOTSUPP; |
97718540 KC |
379 | |
380 | ops.ooblen = length; | |
305b93f1 | 381 | ops.ooboffs = start & (mtd->writesize - 1); |
97718540 | 382 | ops.datbuf = NULL; |
beb133fc | 383 | ops.mode = (mfi->mode == MTD_FILE_MODE_RAW) ? MTD_OPS_RAW : |
0612b9dd | 384 | MTD_OPS_PLACE_OOB; |
97718540 KC |
385 | |
386 | if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs)) | |
387 | return -EINVAL; | |
388 | ||
df1f1d1c JL |
389 | ops.oobbuf = memdup_user(ptr, length); |
390 | if (IS_ERR(ops.oobbuf)) | |
391 | return PTR_ERR(ops.oobbuf); | |
97718540 | 392 | |
305b93f1 | 393 | start &= ~((uint64_t)mtd->writesize - 1); |
a2cc5ba0 | 394 | ret = mtd_write_oob(mtd, start, &ops); |
97718540 KC |
395 | |
396 | if (ops.oobretlen > 0xFFFFFFFFU) | |
397 | ret = -EOVERFLOW; | |
398 | retlen = ops.oobretlen; | |
399 | if (copy_to_user(retp, &retlen, sizeof(length))) | |
400 | ret = -EFAULT; | |
401 | ||
402 | kfree(ops.oobbuf); | |
403 | return ret; | |
404 | } | |
405 | ||
969e57ad | 406 | static int mtdchar_readoob(struct file *file, struct mtd_info *mtd, |
c46f6483 BN |
407 | uint64_t start, uint32_t length, void __user *ptr, |
408 | uint32_t __user *retp) | |
97718540 | 409 | { |
c46f6483 | 410 | struct mtd_file_info *mfi = file->private_data; |
97718540 KC |
411 | struct mtd_oob_ops ops; |
412 | int ret = 0; | |
413 | ||
414 | if (length > 4096) | |
415 | return -EINVAL; | |
416 | ||
97718540 | 417 | ops.ooblen = length; |
305b93f1 | 418 | ops.ooboffs = start & (mtd->writesize - 1); |
97718540 | 419 | ops.datbuf = NULL; |
beb133fc | 420 | ops.mode = (mfi->mode == MTD_FILE_MODE_RAW) ? MTD_OPS_RAW : |
0612b9dd | 421 | MTD_OPS_PLACE_OOB; |
97718540 KC |
422 | |
423 | if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs)) | |
424 | return -EINVAL; | |
425 | ||
426 | ops.oobbuf = kmalloc(length, GFP_KERNEL); | |
427 | if (!ops.oobbuf) | |
428 | return -ENOMEM; | |
429 | ||
305b93f1 | 430 | start &= ~((uint64_t)mtd->writesize - 1); |
fd2819bb | 431 | ret = mtd_read_oob(mtd, start, &ops); |
97718540 KC |
432 | |
433 | if (put_user(ops.oobretlen, retp)) | |
434 | ret = -EFAULT; | |
435 | else if (ops.oobretlen && copy_to_user(ptr, ops.oobbuf, | |
436 | ops.oobretlen)) | |
437 | ret = -EFAULT; | |
438 | ||
439 | kfree(ops.oobbuf); | |
041e4575 BN |
440 | |
441 | /* | |
442 | * NAND returns -EBADMSG on ECC errors, but it returns the OOB | |
443 | * data. For our userspace tools it is important to dump areas | |
444 | * with ECC errors! | |
445 | * For kernel internal usage it also might return -EUCLEAN | |
5d708ecc | 446 | * to signal the caller that a bitflip has occurred and has |
041e4575 BN |
447 | * been corrected by the ECC algorithm. |
448 | * | |
c478d7e4 BN |
449 | * Note: currently the standard NAND function, nand_read_oob_std, |
450 | * does not calculate ECC for the OOB area, so do not rely on | |
451 | * this behavior unless you have replaced it with your own. | |
041e4575 | 452 | */ |
d57f4054 | 453 | if (mtd_is_bitflip_or_eccerr(ret)) |
041e4575 BN |
454 | return 0; |
455 | ||
97718540 KC |
456 | return ret; |
457 | } | |
458 | ||
cc26c3cd | 459 | /* |
aab616e3 BB |
460 | * Copies (and truncates, if necessary) OOB layout information to the |
461 | * deprecated layout struct, nand_ecclayout_user. This is necessary only to | |
462 | * support the deprecated API ioctl ECCGETLAYOUT while allowing all new | |
463 | * functionality to use mtd_ooblayout_ops flexibly (i.e. mtd_ooblayout_ops | |
464 | * can describe any kind of OOB layout with almost zero overhead from a | |
465 | * memory usage point of view). | |
cc26c3cd | 466 | */ |
c2b78452 BB |
467 | static int shrink_ecclayout(struct mtd_info *mtd, |
468 | struct nand_ecclayout_user *to) | |
cc26c3cd | 469 | { |
c2b78452 BB |
470 | struct mtd_oob_region oobregion; |
471 | int i, section = 0, ret; | |
cc26c3cd | 472 | |
c2b78452 | 473 | if (!mtd || !to) |
cc26c3cd BN |
474 | return -EINVAL; |
475 | ||
476 | memset(to, 0, sizeof(*to)); | |
477 | ||
c2b78452 BB |
478 | to->eccbytes = 0; |
479 | for (i = 0; i < MTD_MAX_ECCPOS_ENTRIES;) { | |
480 | u32 eccpos; | |
481 | ||
482 | ret = mtd_ooblayout_ecc(mtd, section, &oobregion); | |
483 | if (ret < 0) { | |
484 | if (ret != -ERANGE) | |
485 | return ret; | |
486 | ||
487 | break; | |
488 | } | |
489 | ||
490 | eccpos = oobregion.offset; | |
491 | for (; i < MTD_MAX_ECCPOS_ENTRIES && | |
492 | eccpos < oobregion.offset + oobregion.length; i++) { | |
493 | to->eccpos[i] = eccpos++; | |
494 | to->eccbytes++; | |
495 | } | |
496 | } | |
cc26c3cd BN |
497 | |
498 | for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES; i++) { | |
c2b78452 BB |
499 | ret = mtd_ooblayout_free(mtd, i, &oobregion); |
500 | if (ret < 0) { | |
501 | if (ret != -ERANGE) | |
502 | return ret; | |
503 | ||
504 | break; | |
505 | } | |
506 | ||
507 | to->oobfree[i].offset = oobregion.offset; | |
508 | to->oobfree[i].length = oobregion.length; | |
509 | to->oobavail += to->oobfree[i].length; | |
510 | } | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
515 | static int get_oobinfo(struct mtd_info *mtd, struct nand_oobinfo *to) | |
516 | { | |
517 | struct mtd_oob_region oobregion; | |
518 | int i, section = 0, ret; | |
519 | ||
520 | if (!mtd || !to) | |
521 | return -EINVAL; | |
522 | ||
523 | memset(to, 0, sizeof(*to)); | |
524 | ||
525 | to->eccbytes = 0; | |
526 | for (i = 0; i < ARRAY_SIZE(to->eccpos);) { | |
527 | u32 eccpos; | |
528 | ||
529 | ret = mtd_ooblayout_ecc(mtd, section, &oobregion); | |
530 | if (ret < 0) { | |
531 | if (ret != -ERANGE) | |
532 | return ret; | |
533 | ||
cc26c3cd | 534 | break; |
c2b78452 BB |
535 | } |
536 | ||
537 | if (oobregion.length + i > ARRAY_SIZE(to->eccpos)) | |
538 | return -EINVAL; | |
539 | ||
540 | eccpos = oobregion.offset; | |
541 | for (; eccpos < oobregion.offset + oobregion.length; i++) { | |
542 | to->eccpos[i] = eccpos++; | |
543 | to->eccbytes++; | |
544 | } | |
cc26c3cd BN |
545 | } |
546 | ||
c2b78452 BB |
547 | for (i = 0; i < 8; i++) { |
548 | ret = mtd_ooblayout_free(mtd, i, &oobregion); | |
549 | if (ret < 0) { | |
550 | if (ret != -ERANGE) | |
551 | return ret; | |
552 | ||
553 | break; | |
554 | } | |
555 | ||
556 | to->oobfree[i][0] = oobregion.offset; | |
557 | to->oobfree[i][1] = oobregion.length; | |
558 | } | |
559 | ||
560 | to->useecc = MTD_NANDECC_AUTOPLACE; | |
561 | ||
cc26c3cd BN |
562 | return 0; |
563 | } | |
564 | ||
969e57ad | 565 | static int mtdchar_blkpg_ioctl(struct mtd_info *mtd, |
53bb724f | 566 | struct blkpg_ioctl_arg *arg) |
d0f7959e | 567 | { |
d0f7959e RT |
568 | struct blkpg_partition p; |
569 | ||
570 | if (!capable(CAP_SYS_ADMIN)) | |
571 | return -EPERM; | |
572 | ||
53bb724f | 573 | if (copy_from_user(&p, arg->data, sizeof(p))) |
d0f7959e RT |
574 | return -EFAULT; |
575 | ||
53bb724f | 576 | switch (arg->op) { |
d0f7959e RT |
577 | case BLKPG_ADD_PARTITION: |
578 | ||
a7e93dcd RT |
579 | /* Only master mtd device must be used to add partitions */ |
580 | if (mtd_is_partition(mtd)) | |
581 | return -EINVAL; | |
582 | ||
1cc8d841 BN |
583 | /* Sanitize user input */ |
584 | p.devname[BLKPG_DEVNAMELTH - 1] = '\0'; | |
585 | ||
d0f7959e RT |
586 | return mtd_add_partition(mtd, p.devname, p.start, p.length); |
587 | ||
588 | case BLKPG_DEL_PARTITION: | |
589 | ||
590 | if (p.pno < 0) | |
591 | return -EINVAL; | |
592 | ||
593 | return mtd_del_partition(mtd, p.pno); | |
594 | ||
595 | default: | |
596 | return -EINVAL; | |
597 | } | |
598 | } | |
d0f7959e | 599 | |
969e57ad | 600 | static int mtdchar_write_ioctl(struct mtd_info *mtd, |
e99d8b08 BN |
601 | struct mtd_write_req __user *argp) |
602 | { | |
603 | struct mtd_write_req req; | |
604 | struct mtd_oob_ops ops; | |
f62cde49 | 605 | const void __user *usr_data, *usr_oob; |
e99d8b08 BN |
606 | int ret; |
607 | ||
f62cde49 | 608 | if (copy_from_user(&req, argp, sizeof(req))) |
e99d8b08 | 609 | return -EFAULT; |
f62cde49 GU |
610 | |
611 | usr_data = (const void __user *)(uintptr_t)req.usr_data; | |
612 | usr_oob = (const void __user *)(uintptr_t)req.usr_oob; | |
f62cde49 | 613 | |
3c3c10bb | 614 | if (!mtd->_write_oob) |
e99d8b08 BN |
615 | return -EOPNOTSUPP; |
616 | ||
617 | ops.mode = req.mode; | |
618 | ops.len = (size_t)req.len; | |
619 | ops.ooblen = (size_t)req.ooblen; | |
620 | ops.ooboffs = 0; | |
621 | ||
f62cde49 | 622 | if (usr_data) { |
e99d8b08 BN |
623 | ops.datbuf = memdup_user(usr_data, ops.len); |
624 | if (IS_ERR(ops.datbuf)) | |
625 | return PTR_ERR(ops.datbuf); | |
626 | } else { | |
627 | ops.datbuf = NULL; | |
628 | } | |
629 | ||
f62cde49 | 630 | if (usr_oob) { |
e99d8b08 BN |
631 | ops.oobbuf = memdup_user(usr_oob, ops.ooblen); |
632 | if (IS_ERR(ops.oobbuf)) { | |
633 | kfree(ops.datbuf); | |
634 | return PTR_ERR(ops.oobbuf); | |
635 | } | |
636 | } else { | |
637 | ops.oobbuf = NULL; | |
638 | } | |
639 | ||
a2cc5ba0 | 640 | ret = mtd_write_oob(mtd, (loff_t)req.start, &ops); |
e99d8b08 BN |
641 | |
642 | kfree(ops.datbuf); | |
643 | kfree(ops.oobbuf); | |
644 | ||
645 | return ret; | |
646 | } | |
647 | ||
969e57ad | 648 | static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg) |
1da177e4 | 649 | { |
f1a28c02 TG |
650 | struct mtd_file_info *mfi = file->private_data; |
651 | struct mtd_info *mtd = mfi->mtd; | |
1da177e4 LT |
652 | void __user *argp = (void __user *)arg; |
653 | int ret = 0; | |
73c619ea | 654 | struct mtd_info_user info; |
97894cda | 655 | |
289c0522 | 656 | pr_debug("MTD_ioctl\n"); |
1da177e4 | 657 | |
1da177e4 LT |
658 | switch (cmd) { |
659 | case MEMGETREGIONCOUNT: | |
660 | if (copy_to_user(argp, &(mtd->numeraseregions), sizeof(int))) | |
661 | return -EFAULT; | |
662 | break; | |
663 | ||
664 | case MEMGETREGIONINFO: | |
665 | { | |
b67c5f87 ZW |
666 | uint32_t ur_idx; |
667 | struct mtd_erase_region_info *kr; | |
bcc98a46 | 668 | struct region_info_user __user *ur = argp; |
1da177e4 | 669 | |
b67c5f87 | 670 | if (get_user(ur_idx, &(ur->regionindex))) |
1da177e4 LT |
671 | return -EFAULT; |
672 | ||
5e59be1f DC |
673 | if (ur_idx >= mtd->numeraseregions) |
674 | return -EINVAL; | |
675 | ||
b67c5f87 ZW |
676 | kr = &(mtd->eraseregions[ur_idx]); |
677 | ||
678 | if (put_user(kr->offset, &(ur->offset)) | |
679 | || put_user(kr->erasesize, &(ur->erasesize)) | |
680 | || put_user(kr->numblocks, &(ur->numblocks))) | |
1da177e4 | 681 | return -EFAULT; |
b67c5f87 | 682 | |
1da177e4 LT |
683 | break; |
684 | } | |
685 | ||
686 | case MEMGETINFO: | |
a0c5a394 | 687 | memset(&info, 0, sizeof(info)); |
73c619ea JE |
688 | info.type = mtd->type; |
689 | info.flags = mtd->flags; | |
690 | info.size = mtd->size; | |
691 | info.erasesize = mtd->erasesize; | |
692 | info.writesize = mtd->writesize; | |
693 | info.oobsize = mtd->oobsize; | |
19fb4341 BN |
694 | /* The below field is obsolete */ |
695 | info.padding = 0; | |
73c619ea | 696 | if (copy_to_user(argp, &info, sizeof(struct mtd_info_user))) |
1da177e4 LT |
697 | return -EFAULT; |
698 | break; | |
699 | ||
700 | case MEMERASE: | |
0dc54e9f | 701 | case MEMERASE64: |
1da177e4 LT |
702 | { |
703 | struct erase_info *erase; | |
704 | ||
aeb5d727 | 705 | if(!(file->f_mode & FMODE_WRITE)) |
1da177e4 LT |
706 | return -EPERM; |
707 | ||
95b93a0c | 708 | erase=kzalloc(sizeof(struct erase_info),GFP_KERNEL); |
1da177e4 LT |
709 | if (!erase) |
710 | ret = -ENOMEM; | |
711 | else { | |
712 | wait_queue_head_t waitq; | |
713 | DECLARE_WAITQUEUE(wait, current); | |
714 | ||
715 | init_waitqueue_head(&waitq); | |
716 | ||
0dc54e9f KC |
717 | if (cmd == MEMERASE64) { |
718 | struct erase_info_user64 einfo64; | |
719 | ||
720 | if (copy_from_user(&einfo64, argp, | |
721 | sizeof(struct erase_info_user64))) { | |
722 | kfree(erase); | |
723 | return -EFAULT; | |
724 | } | |
725 | erase->addr = einfo64.start; | |
726 | erase->len = einfo64.length; | |
727 | } else { | |
728 | struct erase_info_user einfo32; | |
729 | ||
730 | if (copy_from_user(&einfo32, argp, | |
731 | sizeof(struct erase_info_user))) { | |
732 | kfree(erase); | |
733 | return -EFAULT; | |
734 | } | |
735 | erase->addr = einfo32.start; | |
736 | erase->len = einfo32.length; | |
1da177e4 LT |
737 | } |
738 | erase->mtd = mtd; | |
739 | erase->callback = mtdchar_erase_callback; | |
740 | erase->priv = (unsigned long)&waitq; | |
97894cda | 741 | |
1da177e4 LT |
742 | /* |
743 | FIXME: Allow INTERRUPTIBLE. Which means | |
744 | not having the wait_queue head on the stack. | |
97894cda | 745 | |
1da177e4 LT |
746 | If the wq_head is on the stack, and we |
747 | leave because we got interrupted, then the | |
748 | wq_head is no longer there when the | |
749 | callback routine tries to wake us up. | |
750 | */ | |
7e1f0dc0 | 751 | ret = mtd_erase(mtd, erase); |
1da177e4 LT |
752 | if (!ret) { |
753 | set_current_state(TASK_UNINTERRUPTIBLE); | |
754 | add_wait_queue(&waitq, &wait); | |
755 | if (erase->state != MTD_ERASE_DONE && | |
756 | erase->state != MTD_ERASE_FAILED) | |
757 | schedule(); | |
758 | remove_wait_queue(&waitq, &wait); | |
759 | set_current_state(TASK_RUNNING); | |
760 | ||
761 | ret = (erase->state == MTD_ERASE_FAILED)?-EIO:0; | |
762 | } | |
763 | kfree(erase); | |
764 | } | |
765 | break; | |
766 | } | |
767 | ||
768 | case MEMWRITEOOB: | |
769 | { | |
770 | struct mtd_oob_buf buf; | |
97718540 | 771 | struct mtd_oob_buf __user *buf_user = argp; |
1da177e4 | 772 | |
97718540 KC |
773 | /* NOTE: writes return length to buf_user->length */ |
774 | if (copy_from_user(&buf, argp, sizeof(buf))) | |
1da177e4 | 775 | ret = -EFAULT; |
97718540 | 776 | else |
969e57ad | 777 | ret = mtdchar_writeoob(file, mtd, buf.start, buf.length, |
97718540 | 778 | buf.ptr, &buf_user->length); |
1da177e4 | 779 | break; |
1da177e4 LT |
780 | } |
781 | ||
782 | case MEMREADOOB: | |
783 | { | |
784 | struct mtd_oob_buf buf; | |
97718540 | 785 | struct mtd_oob_buf __user *buf_user = argp; |
8593fbc6 | 786 | |
97718540 KC |
787 | /* NOTE: writes return length to buf_user->start */ |
788 | if (copy_from_user(&buf, argp, sizeof(buf))) | |
1da177e4 | 789 | ret = -EFAULT; |
97718540 | 790 | else |
969e57ad | 791 | ret = mtdchar_readoob(file, mtd, buf.start, buf.length, |
97718540 | 792 | buf.ptr, &buf_user->start); |
1da177e4 LT |
793 | break; |
794 | } | |
795 | ||
aea7cea9 KC |
796 | case MEMWRITEOOB64: |
797 | { | |
798 | struct mtd_oob_buf64 buf; | |
799 | struct mtd_oob_buf64 __user *buf_user = argp; | |
800 | ||
801 | if (copy_from_user(&buf, argp, sizeof(buf))) | |
802 | ret = -EFAULT; | |
803 | else | |
969e57ad | 804 | ret = mtdchar_writeoob(file, mtd, buf.start, buf.length, |
aea7cea9 KC |
805 | (void __user *)(uintptr_t)buf.usr_ptr, |
806 | &buf_user->length); | |
807 | break; | |
808 | } | |
809 | ||
810 | case MEMREADOOB64: | |
811 | { | |
812 | struct mtd_oob_buf64 buf; | |
813 | struct mtd_oob_buf64 __user *buf_user = argp; | |
814 | ||
815 | if (copy_from_user(&buf, argp, sizeof(buf))) | |
816 | ret = -EFAULT; | |
817 | else | |
969e57ad | 818 | ret = mtdchar_readoob(file, mtd, buf.start, buf.length, |
aea7cea9 KC |
819 | (void __user *)(uintptr_t)buf.usr_ptr, |
820 | &buf_user->length); | |
821 | break; | |
822 | } | |
823 | ||
e99d8b08 BN |
824 | case MEMWRITE: |
825 | { | |
969e57ad | 826 | ret = mtdchar_write_ioctl(mtd, |
e99d8b08 BN |
827 | (struct mtd_write_req __user *)arg); |
828 | break; | |
829 | } | |
830 | ||
1da177e4 LT |
831 | case MEMLOCK: |
832 | { | |
175428b2 | 833 | struct erase_info_user einfo; |
1da177e4 | 834 | |
175428b2 | 835 | if (copy_from_user(&einfo, argp, sizeof(einfo))) |
1da177e4 LT |
836 | return -EFAULT; |
837 | ||
38134565 | 838 | ret = mtd_lock(mtd, einfo.start, einfo.length); |
1da177e4 LT |
839 | break; |
840 | } | |
841 | ||
842 | case MEMUNLOCK: | |
843 | { | |
175428b2 | 844 | struct erase_info_user einfo; |
1da177e4 | 845 | |
175428b2 | 846 | if (copy_from_user(&einfo, argp, sizeof(einfo))) |
1da177e4 LT |
847 | return -EFAULT; |
848 | ||
38134565 | 849 | ret = mtd_unlock(mtd, einfo.start, einfo.length); |
1da177e4 LT |
850 | break; |
851 | } | |
852 | ||
9938424f RC |
853 | case MEMISLOCKED: |
854 | { | |
855 | struct erase_info_user einfo; | |
856 | ||
857 | if (copy_from_user(&einfo, argp, sizeof(einfo))) | |
858 | return -EFAULT; | |
859 | ||
38134565 | 860 | ret = mtd_is_locked(mtd, einfo.start, einfo.length); |
9938424f RC |
861 | break; |
862 | } | |
863 | ||
5bd34c09 | 864 | /* Legacy interface */ |
1da177e4 LT |
865 | case MEMGETOOBSEL: |
866 | { | |
5bd34c09 TG |
867 | struct nand_oobinfo oi; |
868 | ||
adbbc3bc | 869 | if (!mtd->ooblayout) |
5bd34c09 | 870 | return -EOPNOTSUPP; |
5bd34c09 | 871 | |
c2b78452 BB |
872 | ret = get_oobinfo(mtd, &oi); |
873 | if (ret) | |
874 | return ret; | |
5bd34c09 TG |
875 | |
876 | if (copy_to_user(argp, &oi, sizeof(struct nand_oobinfo))) | |
1da177e4 LT |
877 | return -EFAULT; |
878 | break; | |
879 | } | |
880 | ||
881 | case MEMGETBADBLOCK: | |
882 | { | |
883 | loff_t offs; | |
97894cda | 884 | |
1da177e4 LT |
885 | if (copy_from_user(&offs, argp, sizeof(loff_t))) |
886 | return -EFAULT; | |
8f461a73 | 887 | return mtd_block_isbad(mtd, offs); |
1da177e4 LT |
888 | break; |
889 | } | |
890 | ||
891 | case MEMSETBADBLOCK: | |
892 | { | |
893 | loff_t offs; | |
894 | ||
895 | if (copy_from_user(&offs, argp, sizeof(loff_t))) | |
896 | return -EFAULT; | |
800ffd34 | 897 | return mtd_block_markbad(mtd, offs); |
1da177e4 LT |
898 | break; |
899 | } | |
900 | ||
31f4233b NP |
901 | case OTPSELECT: |
902 | { | |
903 | int mode; | |
904 | if (copy_from_user(&mode, argp, sizeof(int))) | |
905 | return -EFAULT; | |
f1a28c02 | 906 | |
beb133fc | 907 | mfi->mode = MTD_FILE_MODE_NORMAL; |
f1a28c02 TG |
908 | |
909 | ret = otp_select_filemode(mfi, mode); | |
910 | ||
81dba488 | 911 | file->f_pos = 0; |
31f4233b NP |
912 | break; |
913 | } | |
914 | ||
915 | case OTPGETREGIONCOUNT: | |
916 | case OTPGETREGIONINFO: | |
917 | { | |
918 | struct otp_info *buf = kmalloc(4096, GFP_KERNEL); | |
4b78fc42 | 919 | size_t retlen; |
31f4233b NP |
920 | if (!buf) |
921 | return -ENOMEM; | |
f1a28c02 | 922 | switch (mfi->mode) { |
beb133fc | 923 | case MTD_FILE_MODE_OTP_FACTORY: |
4b78fc42 | 924 | ret = mtd_get_fact_prot_info(mtd, 4096, &retlen, buf); |
31f4233b | 925 | break; |
beb133fc | 926 | case MTD_FILE_MODE_OTP_USER: |
4b78fc42 | 927 | ret = mtd_get_user_prot_info(mtd, 4096, &retlen, buf); |
31f4233b | 928 | break; |
f1a28c02 | 929 | default: |
87e858a9 | 930 | ret = -EINVAL; |
f1a28c02 | 931 | break; |
31f4233b | 932 | } |
4b78fc42 | 933 | if (!ret) { |
31f4233b | 934 | if (cmd == OTPGETREGIONCOUNT) { |
4b78fc42 | 935 | int nbr = retlen / sizeof(struct otp_info); |
31f4233b NP |
936 | ret = copy_to_user(argp, &nbr, sizeof(int)); |
937 | } else | |
4b78fc42 | 938 | ret = copy_to_user(argp, buf, retlen); |
31f4233b NP |
939 | if (ret) |
940 | ret = -EFAULT; | |
941 | } | |
942 | kfree(buf); | |
943 | break; | |
944 | } | |
945 | ||
946 | case OTPLOCK: | |
947 | { | |
175428b2 | 948 | struct otp_info oinfo; |
31f4233b | 949 | |
beb133fc | 950 | if (mfi->mode != MTD_FILE_MODE_OTP_USER) |
31f4233b | 951 | return -EINVAL; |
175428b2 | 952 | if (copy_from_user(&oinfo, argp, sizeof(oinfo))) |
31f4233b | 953 | return -EFAULT; |
4403dbfb | 954 | ret = mtd_lock_user_prot_reg(mtd, oinfo.start, oinfo.length); |
31f4233b NP |
955 | break; |
956 | } | |
31f4233b | 957 | |
7854d3f7 | 958 | /* This ioctl is being deprecated - it truncates the ECC layout */ |
f1a28c02 TG |
959 | case ECCGETLAYOUT: |
960 | { | |
cc26c3cd BN |
961 | struct nand_ecclayout_user *usrlay; |
962 | ||
adbbc3bc | 963 | if (!mtd->ooblayout) |
f1a28c02 TG |
964 | return -EOPNOTSUPP; |
965 | ||
cc26c3cd BN |
966 | usrlay = kmalloc(sizeof(*usrlay), GFP_KERNEL); |
967 | if (!usrlay) | |
968 | return -ENOMEM; | |
969 | ||
c2b78452 | 970 | shrink_ecclayout(mtd, usrlay); |
cc26c3cd BN |
971 | |
972 | if (copy_to_user(argp, usrlay, sizeof(*usrlay))) | |
973 | ret = -EFAULT; | |
974 | kfree(usrlay); | |
f1a28c02 TG |
975 | break; |
976 | } | |
977 | ||
978 | case ECCGETSTATS: | |
979 | { | |
980 | if (copy_to_user(argp, &mtd->ecc_stats, | |
981 | sizeof(struct mtd_ecc_stats))) | |
982 | return -EFAULT; | |
983 | break; | |
984 | } | |
985 | ||
986 | case MTDFILEMODE: | |
987 | { | |
988 | mfi->mode = 0; | |
989 | ||
990 | switch(arg) { | |
beb133fc BN |
991 | case MTD_FILE_MODE_OTP_FACTORY: |
992 | case MTD_FILE_MODE_OTP_USER: | |
f1a28c02 TG |
993 | ret = otp_select_filemode(mfi, arg); |
994 | break; | |
995 | ||
beb133fc | 996 | case MTD_FILE_MODE_RAW: |
fc002e3c | 997 | if (!mtd_has_oob(mtd)) |
f1a28c02 TG |
998 | return -EOPNOTSUPP; |
999 | mfi->mode = arg; | |
1000 | ||
beb133fc | 1001 | case MTD_FILE_MODE_NORMAL: |
f1a28c02 TG |
1002 | break; |
1003 | default: | |
1004 | ret = -EINVAL; | |
1005 | } | |
1006 | file->f_pos = 0; | |
1007 | break; | |
1008 | } | |
1009 | ||
d0f7959e RT |
1010 | case BLKPG: |
1011 | { | |
53bb724f BN |
1012 | struct blkpg_ioctl_arg __user *blk_arg = argp; |
1013 | struct blkpg_ioctl_arg a; | |
1014 | ||
1015 | if (copy_from_user(&a, blk_arg, sizeof(a))) | |
1016 | ret = -EFAULT; | |
1017 | else | |
1018 | ret = mtdchar_blkpg_ioctl(mtd, &a); | |
d0f7959e RT |
1019 | break; |
1020 | } | |
1021 | ||
1022 | case BLKRRPART: | |
1023 | { | |
1024 | /* No reread partition feature. Just return ok */ | |
1025 | ret = 0; | |
1026 | break; | |
1027 | } | |
d0f7959e | 1028 | |
1da177e4 LT |
1029 | default: |
1030 | ret = -ENOTTY; | |
1031 | } | |
1032 | ||
1033 | return ret; | |
1034 | } /* memory_ioctl */ | |
1035 | ||
969e57ad | 1036 | static long mtdchar_unlocked_ioctl(struct file *file, u_int cmd, u_long arg) |
55929332 AB |
1037 | { |
1038 | int ret; | |
1039 | ||
5aa82940 | 1040 | mutex_lock(&mtd_mutex); |
969e57ad | 1041 | ret = mtdchar_ioctl(file, cmd, arg); |
5aa82940 | 1042 | mutex_unlock(&mtd_mutex); |
55929332 AB |
1043 | |
1044 | return ret; | |
1045 | } | |
1046 | ||
97718540 KC |
1047 | #ifdef CONFIG_COMPAT |
1048 | ||
1049 | struct mtd_oob_buf32 { | |
1050 | u_int32_t start; | |
1051 | u_int32_t length; | |
1052 | compat_caddr_t ptr; /* unsigned char* */ | |
1053 | }; | |
1054 | ||
1055 | #define MEMWRITEOOB32 _IOWR('M', 3, struct mtd_oob_buf32) | |
1056 | #define MEMREADOOB32 _IOWR('M', 4, struct mtd_oob_buf32) | |
1057 | ||
969e57ad | 1058 | static long mtdchar_compat_ioctl(struct file *file, unsigned int cmd, |
97718540 KC |
1059 | unsigned long arg) |
1060 | { | |
1061 | struct mtd_file_info *mfi = file->private_data; | |
1062 | struct mtd_info *mtd = mfi->mtd; | |
0b6585ce | 1063 | void __user *argp = compat_ptr(arg); |
97718540 KC |
1064 | int ret = 0; |
1065 | ||
5aa82940 | 1066 | mutex_lock(&mtd_mutex); |
97718540 KC |
1067 | |
1068 | switch (cmd) { | |
1069 | case MEMWRITEOOB32: | |
1070 | { | |
1071 | struct mtd_oob_buf32 buf; | |
1072 | struct mtd_oob_buf32 __user *buf_user = argp; | |
1073 | ||
1074 | if (copy_from_user(&buf, argp, sizeof(buf))) | |
1075 | ret = -EFAULT; | |
1076 | else | |
969e57ad | 1077 | ret = mtdchar_writeoob(file, mtd, buf.start, |
97718540 KC |
1078 | buf.length, compat_ptr(buf.ptr), |
1079 | &buf_user->length); | |
1080 | break; | |
1081 | } | |
1082 | ||
1083 | case MEMREADOOB32: | |
1084 | { | |
1085 | struct mtd_oob_buf32 buf; | |
1086 | struct mtd_oob_buf32 __user *buf_user = argp; | |
1087 | ||
1088 | /* NOTE: writes return length to buf->start */ | |
1089 | if (copy_from_user(&buf, argp, sizeof(buf))) | |
1090 | ret = -EFAULT; | |
1091 | else | |
969e57ad | 1092 | ret = mtdchar_readoob(file, mtd, buf.start, |
97718540 KC |
1093 | buf.length, compat_ptr(buf.ptr), |
1094 | &buf_user->start); | |
1095 | break; | |
1096 | } | |
53bb724f BN |
1097 | |
1098 | case BLKPG: | |
1099 | { | |
1100 | /* Convert from blkpg_compat_ioctl_arg to blkpg_ioctl_arg */ | |
1101 | struct blkpg_compat_ioctl_arg __user *uarg = argp; | |
1102 | struct blkpg_compat_ioctl_arg compat_arg; | |
1103 | struct blkpg_ioctl_arg a; | |
1104 | ||
1105 | if (copy_from_user(&compat_arg, uarg, sizeof(compat_arg))) { | |
1106 | ret = -EFAULT; | |
1107 | break; | |
1108 | } | |
1109 | ||
1110 | memset(&a, 0, sizeof(a)); | |
1111 | a.op = compat_arg.op; | |
1112 | a.flags = compat_arg.flags; | |
1113 | a.datalen = compat_arg.datalen; | |
1114 | a.data = compat_ptr(compat_arg.data); | |
1115 | ||
1116 | ret = mtdchar_blkpg_ioctl(mtd, &a); | |
1117 | break; | |
1118 | } | |
1119 | ||
97718540 | 1120 | default: |
969e57ad | 1121 | ret = mtdchar_ioctl(file, cmd, (unsigned long)argp); |
97718540 KC |
1122 | } |
1123 | ||
5aa82940 | 1124 | mutex_unlock(&mtd_mutex); |
97718540 KC |
1125 | |
1126 | return ret; | |
1127 | } | |
1128 | ||
1129 | #endif /* CONFIG_COMPAT */ | |
1130 | ||
402d3265 DH |
1131 | /* |
1132 | * try to determine where a shared mapping can be made | |
1133 | * - only supported for NOMMU at the moment (MMU can't doesn't copy private | |
1134 | * mappings) | |
1135 | */ | |
1136 | #ifndef CONFIG_MMU | |
969e57ad | 1137 | static unsigned long mtdchar_get_unmapped_area(struct file *file, |
402d3265 DH |
1138 | unsigned long addr, |
1139 | unsigned long len, | |
1140 | unsigned long pgoff, | |
1141 | unsigned long flags) | |
1142 | { | |
1143 | struct mtd_file_info *mfi = file->private_data; | |
1144 | struct mtd_info *mtd = mfi->mtd; | |
cd621274 AB |
1145 | unsigned long offset; |
1146 | int ret; | |
402d3265 | 1147 | |
cd621274 AB |
1148 | if (addr != 0) |
1149 | return (unsigned long) -EINVAL; | |
402d3265 | 1150 | |
cd621274 AB |
1151 | if (len > mtd->size || pgoff >= (mtd->size >> PAGE_SHIFT)) |
1152 | return (unsigned long) -EINVAL; | |
402d3265 | 1153 | |
cd621274 AB |
1154 | offset = pgoff << PAGE_SHIFT; |
1155 | if (offset > mtd->size - len) | |
1156 | return (unsigned long) -EINVAL; | |
402d3265 | 1157 | |
cd621274 | 1158 | ret = mtd_get_unmapped_area(mtd, len, offset, flags); |
b9995932 | 1159 | return ret == -EOPNOTSUPP ? -ENODEV : ret; |
402d3265 | 1160 | } |
b4caecd4 CH |
1161 | |
1162 | static unsigned mtdchar_mmap_capabilities(struct file *file) | |
1163 | { | |
1164 | struct mtd_file_info *mfi = file->private_data; | |
1165 | ||
1166 | return mtd_mmap_capabilities(mfi->mtd); | |
1167 | } | |
402d3265 DH |
1168 | #endif |
1169 | ||
1170 | /* | |
1171 | * set up a mapping for shared memory segments | |
1172 | */ | |
969e57ad | 1173 | static int mtdchar_mmap(struct file *file, struct vm_area_struct *vma) |
402d3265 DH |
1174 | { |
1175 | #ifdef CONFIG_MMU | |
1176 | struct mtd_file_info *mfi = file->private_data; | |
1177 | struct mtd_info *mtd = mfi->mtd; | |
dd02b67d | 1178 | struct map_info *map = mtd->priv; |
dd02b67d | 1179 | |
f5cf8f07 DW |
1180 | /* This is broken because it assumes the MTD device is map-based |
1181 | and that mtd->priv is a valid struct map_info. It should be | |
1182 | replaced with something that uses the mtd_get_unmapped_area() | |
1183 | operation properly. */ | |
1184 | if (0 /*mtd->type == MTD_RAM || mtd->type == MTD_ROM*/) { | |
dd02b67d | 1185 | #ifdef pgprot_noncached |
8558e4a2 | 1186 | if (file->f_flags & O_DSYNC || map->phys >= __pa(high_memory)) |
dd02b67d AG |
1187 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
1188 | #endif | |
8558e4a2 | 1189 | return vm_iomap_memory(vma, map->phys, map->size); |
dd02b67d | 1190 | } |
b9995932 | 1191 | return -ENODEV; |
402d3265 | 1192 | #else |
b9995932 | 1193 | return vma->vm_flags & VM_SHARED ? 0 : -EACCES; |
402d3265 DH |
1194 | #endif |
1195 | } | |
1196 | ||
d54b1fdb | 1197 | static const struct file_operations mtd_fops = { |
1da177e4 | 1198 | .owner = THIS_MODULE, |
969e57ad AB |
1199 | .llseek = mtdchar_lseek, |
1200 | .read = mtdchar_read, | |
1201 | .write = mtdchar_write, | |
1202 | .unlocked_ioctl = mtdchar_unlocked_ioctl, | |
97718540 | 1203 | #ifdef CONFIG_COMPAT |
969e57ad | 1204 | .compat_ioctl = mtdchar_compat_ioctl, |
97718540 | 1205 | #endif |
969e57ad AB |
1206 | .open = mtdchar_open, |
1207 | .release = mtdchar_close, | |
1208 | .mmap = mtdchar_mmap, | |
402d3265 | 1209 | #ifndef CONFIG_MMU |
969e57ad | 1210 | .get_unmapped_area = mtdchar_get_unmapped_area, |
b4caecd4 | 1211 | .mmap_capabilities = mtdchar_mmap_capabilities, |
402d3265 | 1212 | #endif |
1da177e4 LT |
1213 | }; |
1214 | ||
660685d9 | 1215 | int __init init_mtdchar(void) |
1da177e4 | 1216 | { |
cd874237 | 1217 | int ret; |
1f24b5a8 | 1218 | |
cd874237 | 1219 | ret = __register_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, |
dad0db31 | 1220 | "mtd", &mtd_fops); |
cd874237 | 1221 | if (ret < 0) { |
57ae2b60 AB |
1222 | pr_err("Can't allocate major number %d for MTD\n", |
1223 | MTD_CHAR_MAJOR); | |
cd874237 | 1224 | return ret; |
9bc7b387 TP |
1225 | } |
1226 | ||
cd874237 | 1227 | return ret; |
1da177e4 LT |
1228 | } |
1229 | ||
660685d9 | 1230 | void __exit cleanup_mtdchar(void) |
1da177e4 | 1231 | { |
dad0db31 | 1232 | __unregister_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, "mtd"); |
1da177e4 LT |
1233 | } |
1234 | ||
90160e13 | 1235 | MODULE_ALIAS_CHARDEV_MAJOR(MTD_CHAR_MAJOR); |