Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
David Woodhouse | a1452a3 | 2010-08-08 20:58:20 +0100 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | * |
| 18 | */ |
| 19 | |
Thomas Gleixner | 15fdc52 | 2005-11-07 00:14:42 +0100 | [diff] [blame] | 20 | #include <linux/device.h> |
| 21 | #include <linux/fs.h> |
Andrew Morton | 0c1eafd | 2007-08-10 13:01:06 -0700 | [diff] [blame] | 22 | #include <linux/mm.h> |
Artem Bityutskiy | 9c74034 | 2006-10-11 14:52:47 +0300 | [diff] [blame] | 23 | #include <linux/err.h> |
Thomas Gleixner | 15fdc52 | 2005-11-07 00:14:42 +0100 | [diff] [blame] | 24 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/kernel.h> |
| 26 | #include <linux/module.h> |
Thomas Gleixner | 15fdc52 | 2005-11-07 00:14:42 +0100 | [diff] [blame] | 27 | #include <linux/slab.h> |
| 28 | #include <linux/sched.h> |
Arnd Bergmann | 5aa8294 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 29 | #include <linux/mutex.h> |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 30 | #include <linux/backing-dev.h> |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 31 | #include <linux/compat.h> |
Kirill A. Shutemov | cd87423 | 2010-05-17 16:55:47 +0300 | [diff] [blame] | 32 | #include <linux/mount.h> |
Roman Tereshonkov | d0f7959 | 2010-09-17 13:31:42 +0300 | [diff] [blame] | 33 | #include <linux/blkpg.h> |
Muthu Kumar | b502bd1 | 2012-03-23 15:01:50 -0700 | [diff] [blame] | 34 | #include <linux/magic.h> |
Ezequiel Garcia | f83c383 | 2013-10-13 18:05:23 -0300 | [diff] [blame] | 35 | #include <linux/major.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/mtd/mtd.h> |
Roman Tereshonkov | d0f7959 | 2010-09-17 13:31:42 +0300 | [diff] [blame] | 37 | #include <linux/mtd/partitions.h> |
Anatolij Gustschin | dd02b67 | 2010-06-15 09:30:15 +0200 | [diff] [blame] | 38 | #include <linux/mtd/map.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Linus Torvalds | 7c0f6ba | 2016-12-24 11:46:01 -0800 | [diff] [blame] | 40 | #include <linux/uaccess.h> |
Todd Poynor | 9bc7b38 | 2005-06-30 01:23:27 +0100 | [diff] [blame] | 41 | |
Artem Bityutskiy | 660685d | 2013-03-14 13:27:40 +0200 | [diff] [blame] | 42 | #include "mtdcore.h" |
| 43 | |
Arnd Bergmann | 5aa8294 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 44 | static DEFINE_MUTEX(mtd_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Nicolas Pitre | 045e9a5d5 | 2005-02-08 19:12:53 +0000 | [diff] [blame] | 46 | /* |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 47 | * Data structure to hold the pointer to the mtd device as well |
Brian Norris | 92394b5c | 2011-07-20 09:53:42 -0700 | [diff] [blame] | 48 | * as mode information of various use cases. |
Nicolas Pitre | 045e9a5d5 | 2005-02-08 19:12:53 +0000 | [diff] [blame] | 49 | */ |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 50 | struct mtd_file_info { |
| 51 | struct mtd_info *mtd; |
| 52 | enum mtd_file_modes mode; |
| 53 | }; |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 54 | |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 55 | static loff_t mtdchar_lseek(struct file *file, loff_t offset, int orig) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | { |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 57 | struct mtd_file_info *mfi = file->private_data; |
Al Viro | b959957 | 2013-06-16 20:27:42 +0400 | [diff] [blame] | 58 | return fixed_size_llseek(file, offset, orig, mfi->mtd->size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | } |
| 60 | |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 61 | static int mtdchar_open(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | { |
| 63 | int minor = iminor(inode); |
| 64 | int devnum = minor >> 1; |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 65 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | struct mtd_info *mtd; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 67 | struct mtd_file_info *mfi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 69 | pr_debug("MTD_open\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | /* You can't open the RO devices RW */ |
Al Viro | aeb5d72 | 2008-09-02 15:28:45 -0400 | [diff] [blame] | 72 | if ((file->f_mode & FMODE_WRITE) && (minor & 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | return -EACCES; |
| 74 | |
Arnd Bergmann | 5aa8294 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 75 | mutex_lock(&mtd_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | mtd = get_mtd_device(NULL, devnum); |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 77 | |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 78 | if (IS_ERR(mtd)) { |
| 79 | ret = PTR_ERR(mtd); |
| 80 | goto out; |
| 81 | } |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 82 | |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 83 | if (mtd->type == MTD_ABSENT) { |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 84 | ret = -ENODEV; |
Al Viro | c65390f | 2012-04-09 01:36:28 -0400 | [diff] [blame] | 85 | goto out1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | } |
| 87 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | /* You can't open it RW if it's not a writeable device */ |
Al Viro | aeb5d72 | 2008-09-02 15:28:45 -0400 | [diff] [blame] | 89 | if ((file->f_mode & FMODE_WRITE) && !(mtd->flags & MTD_WRITEABLE)) { |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 90 | ret = -EACCES; |
Christoph Hellwig | b4caecd | 2015-01-14 10:42:32 +0100 | [diff] [blame] | 91 | goto out1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | } |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 93 | |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 94 | mfi = kzalloc(sizeof(*mfi), GFP_KERNEL); |
| 95 | if (!mfi) { |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 96 | ret = -ENOMEM; |
Christoph Hellwig | b4caecd | 2015-01-14 10:42:32 +0100 | [diff] [blame] | 97 | goto out1; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 98 | } |
| 99 | mfi->mtd = mtd; |
| 100 | file->private_data = mfi; |
Al Viro | c65390f | 2012-04-09 01:36:28 -0400 | [diff] [blame] | 101 | mutex_unlock(&mtd_mutex); |
| 102 | return 0; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 103 | |
Al Viro | c65390f | 2012-04-09 01:36:28 -0400 | [diff] [blame] | 104 | out1: |
| 105 | put_mtd_device(mtd); |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 106 | out: |
Arnd Bergmann | 5aa8294 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 107 | mutex_unlock(&mtd_mutex); |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 108 | return ret; |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 109 | } /* mtdchar_open */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
| 111 | /*====================================================================*/ |
| 112 | |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 113 | static int mtdchar_close(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | { |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 115 | struct mtd_file_info *mfi = file->private_data; |
| 116 | struct mtd_info *mtd = mfi->mtd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 118 | pr_debug("MTD_close\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
Joakim Tjernlund | 7eafaed | 2007-06-27 00:56:40 +0200 | [diff] [blame] | 120 | /* Only sync if opened RW */ |
Artem Bityutskiy | 327cf29 | 2011-12-30 16:35:35 +0200 | [diff] [blame] | 121 | if ((file->f_mode & FMODE_WRITE)) |
Artem Bityutskiy | 85f2f2a | 2011-12-23 19:03:12 +0200 | [diff] [blame] | 122 | mtd_sync(mtd); |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | put_mtd_device(mtd); |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 125 | file->private_data = NULL; |
| 126 | kfree(mfi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
| 128 | return 0; |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 129 | } /* mtdchar_close */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
Grant Erickson | 3e45cf5 | 2011-04-08 08:51:33 -0700 | [diff] [blame] | 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 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 149 | static ssize_t mtdchar_read(struct file *file, char __user *buf, size_t count, |
| 150 | loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | { |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 152 | struct mtd_file_info *mfi = file->private_data; |
| 153 | struct mtd_info *mtd = mfi->mtd; |
Artem Bityutskiy | 30fa984 | 2011-12-29 15:16:28 +0200 | [diff] [blame] | 154 | size_t retlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | size_t total_retlen=0; |
| 156 | int ret=0; |
| 157 | int len; |
Grant Erickson | 3e45cf5 | 2011-04-08 08:51:33 -0700 | [diff] [blame] | 158 | size_t size = count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | char *kbuf; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 160 | |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 161 | pr_debug("MTD_read\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
Jann Horn | 6c6bc9e | 2018-07-07 05:37:22 +0200 | [diff] [blame] | 163 | if (*ppos + count > mtd->size) { |
| 164 | if (*ppos < mtd->size) |
| 165 | count = mtd->size - *ppos; |
| 166 | else |
| 167 | count = 0; |
| 168 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | if (!count) |
| 171 | return 0; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 172 | |
Grant Erickson | 3e45cf5 | 2011-04-08 08:51:33 -0700 | [diff] [blame] | 173 | kbuf = mtd_kmalloc_up_to(mtd, &size); |
Thago Galesi | b802c07 | 2006-04-17 17:38:15 +0100 | [diff] [blame] | 174 | if (!kbuf) |
| 175 | return -ENOMEM; |
| 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | while (count) { |
Grant Erickson | 3e45cf5 | 2011-04-08 08:51:33 -0700 | [diff] [blame] | 178 | len = min_t(size_t, count, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 180 | switch (mfi->mode) { |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 181 | case MTD_FILE_MODE_OTP_FACTORY: |
Artem Bityutskiy | d264f72 | 2011-12-23 18:40:06 +0200 | [diff] [blame] | 182 | ret = mtd_read_fact_prot_reg(mtd, *ppos, len, |
| 183 | &retlen, kbuf); |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 184 | break; |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 185 | case MTD_FILE_MODE_OTP_USER: |
Artem Bityutskiy | 4ea1cab | 2011-12-23 18:47:59 +0200 | [diff] [blame] | 186 | ret = mtd_read_user_prot_reg(mtd, *ppos, len, |
| 187 | &retlen, kbuf); |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 188 | break; |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 189 | case MTD_FILE_MODE_RAW: |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 190 | { |
| 191 | struct mtd_oob_ops ops; |
| 192 | |
Brian Norris | 0612b9d | 2011-08-30 18:45:40 -0700 | [diff] [blame] | 193 | ops.mode = MTD_OPS_RAW; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 194 | ops.datbuf = kbuf; |
| 195 | ops.oobbuf = NULL; |
| 196 | ops.len = len; |
| 197 | |
Artem Bityutskiy | fd2819bb | 2011-12-23 18:27:05 +0200 | [diff] [blame] | 198 | ret = mtd_read_oob(mtd, *ppos, &ops); |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 199 | retlen = ops.retlen; |
| 200 | break; |
| 201 | } |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 202 | default: |
Artem Bityutskiy | 329ad39 | 2011-12-23 17:30:16 +0200 | [diff] [blame] | 203 | ret = mtd_read(mtd, *ppos, len, &retlen, kbuf); |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 204 | } |
Brian Norris | 7854d3f | 2011-06-23 14:12:08 -0700 | [diff] [blame] | 205 | /* Nand returns -EBADMSG on ECC errors, but it returns |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | * the data. For our userspace tools it is important |
Brian Norris | 7854d3f | 2011-06-23 14:12:08 -0700 | [diff] [blame] | 207 | * to dump areas with ECC errors! |
Thomas Gleixner | 9a1fcdf | 2006-05-29 14:56:39 +0200 | [diff] [blame] | 208 | * For kernel internal usage it also might return -EUCLEAN |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 209 | * to signal the caller that a bitflip has occurred and has |
Thomas Gleixner | 9a1fcdf | 2006-05-29 14:56:39 +0200 | [diff] [blame] | 210 | * been corrected by the ECC algorithm. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | * Userspace software which accesses NAND this way |
| 212 | * must be aware of the fact that it deals with NAND |
| 213 | */ |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 214 | if (!ret || mtd_is_bitflip_or_eccerr(ret)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | *ppos += retlen; |
| 216 | if (copy_to_user(buf, kbuf, retlen)) { |
Thomas Gleixner | f4a43cf | 2006-05-28 11:01:53 +0200 | [diff] [blame] | 217 | kfree(kbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | return -EFAULT; |
| 219 | } |
| 220 | else |
| 221 | total_retlen += retlen; |
| 222 | |
| 223 | count -= retlen; |
| 224 | buf += retlen; |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 225 | if (retlen == 0) |
| 226 | count = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | } |
| 228 | else { |
| 229 | kfree(kbuf); |
| 230 | return ret; |
| 231 | } |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | } |
| 234 | |
Thago Galesi | b802c07 | 2006-04-17 17:38:15 +0100 | [diff] [blame] | 235 | kfree(kbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | return total_retlen; |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 237 | } /* mtdchar_read */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 239 | static ssize_t mtdchar_write(struct file *file, const char __user *buf, size_t count, |
| 240 | loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | { |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 242 | struct mtd_file_info *mfi = file->private_data; |
| 243 | struct mtd_info *mtd = mfi->mtd; |
Grant Erickson | 3e45cf5 | 2011-04-08 08:51:33 -0700 | [diff] [blame] | 244 | size_t size = count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | char *kbuf; |
| 246 | size_t retlen; |
| 247 | size_t total_retlen=0; |
| 248 | int ret=0; |
| 249 | int len; |
| 250 | |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 251 | pr_debug("MTD_write\n"); |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 252 | |
Jann Horn | 6c6bc9e | 2018-07-07 05:37:22 +0200 | [diff] [blame] | 253 | if (*ppos >= mtd->size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | return -ENOSPC; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | if (*ppos + count > mtd->size) |
| 257 | count = mtd->size - *ppos; |
| 258 | |
| 259 | if (!count) |
| 260 | return 0; |
| 261 | |
Grant Erickson | 3e45cf5 | 2011-04-08 08:51:33 -0700 | [diff] [blame] | 262 | kbuf = mtd_kmalloc_up_to(mtd, &size); |
Thago Galesi | b802c07 | 2006-04-17 17:38:15 +0100 | [diff] [blame] | 263 | if (!kbuf) |
| 264 | return -ENOMEM; |
| 265 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | while (count) { |
Grant Erickson | 3e45cf5 | 2011-04-08 08:51:33 -0700 | [diff] [blame] | 267 | len = min_t(size_t, count, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | if (copy_from_user(kbuf, buf, len)) { |
| 270 | kfree(kbuf); |
| 271 | return -EFAULT; |
| 272 | } |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 273 | |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 274 | switch (mfi->mode) { |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 275 | case MTD_FILE_MODE_OTP_FACTORY: |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 276 | ret = -EROFS; |
| 277 | break; |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 278 | case MTD_FILE_MODE_OTP_USER: |
Artem Bityutskiy | 482b43a | 2011-12-23 18:50:04 +0200 | [diff] [blame] | 279 | ret = mtd_write_user_prot_reg(mtd, *ppos, len, |
| 280 | &retlen, kbuf); |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 281 | break; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 282 | |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 283 | case MTD_FILE_MODE_RAW: |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 284 | { |
| 285 | struct mtd_oob_ops ops; |
| 286 | |
Brian Norris | 0612b9d | 2011-08-30 18:45:40 -0700 | [diff] [blame] | 287 | ops.mode = MTD_OPS_RAW; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 288 | ops.datbuf = kbuf; |
| 289 | ops.oobbuf = NULL; |
Peter Wippich | bf51408 | 2011-06-06 15:50:58 +0200 | [diff] [blame] | 290 | ops.ooboffs = 0; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 291 | ops.len = len; |
| 292 | |
Artem Bityutskiy | a2cc5ba | 2011-12-23 18:29:55 +0200 | [diff] [blame] | 293 | ret = mtd_write_oob(mtd, *ppos, &ops); |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 294 | retlen = ops.retlen; |
| 295 | break; |
| 296 | } |
| 297 | |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 298 | default: |
Artem Bityutskiy | eda95cb | 2011-12-23 17:35:41 +0200 | [diff] [blame] | 299 | ret = mtd_write(mtd, *ppos, len, &retlen, kbuf); |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 300 | } |
Christian Riesch | 9a78bc8 | 2014-03-06 12:42:37 +0100 | [diff] [blame] | 301 | |
| 302 | /* |
| 303 | * Return -ENOSPC only if no data could be written at all. |
| 304 | * Otherwise just return the number of bytes that actually |
| 305 | * have been written. |
| 306 | */ |
| 307 | if ((ret == -ENOSPC) && (total_retlen)) |
| 308 | break; |
| 309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | if (!ret) { |
| 311 | *ppos += retlen; |
| 312 | total_retlen += retlen; |
| 313 | count -= retlen; |
| 314 | buf += retlen; |
| 315 | } |
| 316 | else { |
| 317 | kfree(kbuf); |
| 318 | return ret; |
| 319 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | } |
| 321 | |
Thago Galesi | b802c07 | 2006-04-17 17:38:15 +0100 | [diff] [blame] | 322 | kfree(kbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | return total_retlen; |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 324 | } /* mtdchar_write */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
| 326 | /*====================================================================== |
| 327 | |
| 328 | IOCTL calls for getting device parameters. |
| 329 | |
| 330 | ======================================================================*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 332 | static int otp_select_filemode(struct mtd_file_info *mfi, int mode) |
| 333 | { |
| 334 | struct mtd_info *mtd = mfi->mtd; |
Artem Bityutskiy | b6de3d6 | 2011-12-29 10:06:32 +0200 | [diff] [blame] | 335 | size_t retlen; |
Artem Bityutskiy | b6de3d6 | 2011-12-29 10:06:32 +0200 | [diff] [blame] | 336 | |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 337 | switch (mode) { |
| 338 | case MTD_OTP_FACTORY: |
Uwe Kleine-König | 5dc63fa | 2013-03-04 17:35:24 +0100 | [diff] [blame] | 339 | if (mtd_read_fact_prot_reg(mtd, -1, 0, &retlen, NULL) == |
| 340 | -EOPNOTSUPP) |
| 341 | return -EOPNOTSUPP; |
| 342 | |
Artem Bityutskiy | b6de3d6 | 2011-12-29 10:06:32 +0200 | [diff] [blame] | 343 | mfi->mode = MTD_FILE_MODE_OTP_FACTORY; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 344 | break; |
| 345 | case MTD_OTP_USER: |
Uwe Kleine-König | 5dc63fa | 2013-03-04 17:35:24 +0100 | [diff] [blame] | 346 | if (mtd_read_user_prot_reg(mtd, -1, 0, &retlen, NULL) == |
| 347 | -EOPNOTSUPP) |
| 348 | return -EOPNOTSUPP; |
| 349 | |
Artem Bityutskiy | b6de3d6 | 2011-12-29 10:06:32 +0200 | [diff] [blame] | 350 | mfi->mode = MTD_FILE_MODE_OTP_USER; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 351 | break; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 352 | case MTD_OTP_OFF: |
Uwe Kleine-König | 5dc63fa | 2013-03-04 17:35:24 +0100 | [diff] [blame] | 353 | mfi->mode = MTD_FILE_MODE_NORMAL; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 354 | break; |
Uwe Kleine-König | 5dc63fa | 2013-03-04 17:35:24 +0100 | [diff] [blame] | 355 | default: |
| 356 | return -EINVAL; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 357 | } |
Uwe Kleine-König | 5dc63fa | 2013-03-04 17:35:24 +0100 | [diff] [blame] | 358 | |
| 359 | return 0; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 360 | } |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 361 | |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 362 | static int mtdchar_writeoob(struct file *file, struct mtd_info *mtd, |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 363 | uint64_t start, uint32_t length, void __user *ptr, |
| 364 | uint32_t __user *retp) |
| 365 | { |
Brian Norris | 9ce244b | 2011-08-30 18:45:37 -0700 | [diff] [blame] | 366 | struct mtd_file_info *mfi = file->private_data; |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 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 | |
Artem Bityutskiy | 3c3c10b | 2012-01-30 14:58:32 +0200 | [diff] [blame] | 377 | if (!mtd->_write_oob) |
Al Viro | 0db188f | 2017-09-29 13:55:19 -0400 | [diff] [blame] | 378 | return -EOPNOTSUPP; |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 379 | |
| 380 | ops.ooblen = length; |
Brian Norris | 305b93f | 2011-08-23 17:17:32 -0700 | [diff] [blame] | 381 | ops.ooboffs = start & (mtd->writesize - 1); |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 382 | ops.datbuf = NULL; |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 383 | ops.mode = (mfi->mode == MTD_FILE_MODE_RAW) ? MTD_OPS_RAW : |
Brian Norris | 0612b9d | 2011-08-30 18:45:40 -0700 | [diff] [blame] | 384 | MTD_OPS_PLACE_OOB; |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 385 | |
| 386 | if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs)) |
| 387 | return -EINVAL; |
| 388 | |
Julia Lawall | df1f1d1 | 2010-05-22 10:22:49 +0200 | [diff] [blame] | 389 | ops.oobbuf = memdup_user(ptr, length); |
| 390 | if (IS_ERR(ops.oobbuf)) |
| 391 | return PTR_ERR(ops.oobbuf); |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 392 | |
Brian Norris | 305b93f | 2011-08-23 17:17:32 -0700 | [diff] [blame] | 393 | start &= ~((uint64_t)mtd->writesize - 1); |
Artem Bityutskiy | a2cc5ba | 2011-12-23 18:29:55 +0200 | [diff] [blame] | 394 | ret = mtd_write_oob(mtd, start, &ops); |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 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 | |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 406 | static int mtdchar_readoob(struct file *file, struct mtd_info *mtd, |
Brian Norris | c46f648 | 2011-08-30 18:45:38 -0700 | [diff] [blame] | 407 | uint64_t start, uint32_t length, void __user *ptr, |
| 408 | uint32_t __user *retp) |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 409 | { |
Brian Norris | c46f648 | 2011-08-30 18:45:38 -0700 | [diff] [blame] | 410 | struct mtd_file_info *mfi = file->private_data; |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 411 | struct mtd_oob_ops ops; |
| 412 | int ret = 0; |
| 413 | |
| 414 | if (length > 4096) |
| 415 | return -EINVAL; |
| 416 | |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 417 | ops.ooblen = length; |
Brian Norris | 305b93f | 2011-08-23 17:17:32 -0700 | [diff] [blame] | 418 | ops.ooboffs = start & (mtd->writesize - 1); |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 419 | ops.datbuf = NULL; |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 420 | ops.mode = (mfi->mode == MTD_FILE_MODE_RAW) ? MTD_OPS_RAW : |
Brian Norris | 0612b9d | 2011-08-30 18:45:40 -0700 | [diff] [blame] | 421 | MTD_OPS_PLACE_OOB; |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 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 | |
Brian Norris | 305b93f | 2011-08-23 17:17:32 -0700 | [diff] [blame] | 430 | start &= ~((uint64_t)mtd->writesize - 1); |
Artem Bityutskiy | fd2819bb | 2011-12-23 18:27:05 +0200 | [diff] [blame] | 431 | ret = mtd_read_oob(mtd, start, &ops); |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 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); |
Brian Norris | 041e457 | 2011-06-23 16:45:24 -0700 | [diff] [blame] | 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 |
Nobuhiro Iwamatsu | 5d708ec | 2017-01-27 10:36:38 +0900 | [diff] [blame] | 446 | * to signal the caller that a bitflip has occurred and has |
Brian Norris | 041e457 | 2011-06-23 16:45:24 -0700 | [diff] [blame] | 447 | * been corrected by the ECC algorithm. |
| 448 | * |
Brian Norris | c478d7e | 2011-06-28 16:29:00 -0700 | [diff] [blame] | 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. |
Brian Norris | 041e457 | 2011-06-23 16:45:24 -0700 | [diff] [blame] | 452 | */ |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 453 | if (mtd_is_bitflip_or_eccerr(ret)) |
Brian Norris | 041e457 | 2011-06-23 16:45:24 -0700 | [diff] [blame] | 454 | return 0; |
| 455 | |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 456 | return ret; |
| 457 | } |
| 458 | |
Brian Norris | cc26c3c | 2010-08-24 18:12:00 -0700 | [diff] [blame] | 459 | /* |
Boris Brezillon | aab616e | 2016-02-04 10:16:18 +0100 | [diff] [blame] | 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). |
Brian Norris | cc26c3c | 2010-08-24 18:12:00 -0700 | [diff] [blame] | 466 | */ |
Boris Brezillon | c2b7845 | 2016-02-03 20:10:30 +0100 | [diff] [blame] | 467 | static int shrink_ecclayout(struct mtd_info *mtd, |
| 468 | struct nand_ecclayout_user *to) |
Brian Norris | cc26c3c | 2010-08-24 18:12:00 -0700 | [diff] [blame] | 469 | { |
Boris Brezillon | c2b7845 | 2016-02-03 20:10:30 +0100 | [diff] [blame] | 470 | struct mtd_oob_region oobregion; |
| 471 | int i, section = 0, ret; |
Brian Norris | cc26c3c | 2010-08-24 18:12:00 -0700 | [diff] [blame] | 472 | |
Boris Brezillon | c2b7845 | 2016-02-03 20:10:30 +0100 | [diff] [blame] | 473 | if (!mtd || !to) |
Brian Norris | cc26c3c | 2010-08-24 18:12:00 -0700 | [diff] [blame] | 474 | return -EINVAL; |
| 475 | |
| 476 | memset(to, 0, sizeof(*to)); |
| 477 | |
Boris Brezillon | c2b7845 | 2016-02-03 20:10:30 +0100 | [diff] [blame] | 478 | to->eccbytes = 0; |
| 479 | for (i = 0; i < MTD_MAX_ECCPOS_ENTRIES;) { |
| 480 | u32 eccpos; |
| 481 | |
OuYang ZhiZhong | 6de5649 | 2018-03-11 15:59:07 +0800 | [diff] [blame] | 482 | ret = mtd_ooblayout_ecc(mtd, section++, &oobregion); |
Boris Brezillon | c2b7845 | 2016-02-03 20:10:30 +0100 | [diff] [blame] | 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 | } |
Brian Norris | cc26c3c | 2010-08-24 18:12:00 -0700 | [diff] [blame] | 497 | |
| 498 | for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES; i++) { |
Boris Brezillon | c2b7845 | 2016-02-03 20:10:30 +0100 | [diff] [blame] | 499 | ret = mtd_ooblayout_free(mtd, i, &oobregion); |
| 500 | if (ret < 0) { |
| 501 | if (ret != -ERANGE) |
| 502 | return ret; |
| 503 | |
Brian Norris | cc26c3c | 2010-08-24 18:12:00 -0700 | [diff] [blame] | 504 | break; |
Boris Brezillon | c2b7845 | 2016-02-03 20:10:30 +0100 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | to->oobfree[i].offset = oobregion.offset; |
| 508 | to->oobfree[i].length = oobregion.length; |
| 509 | to->oobavail += to->oobfree[i].length; |
Brian Norris | cc26c3c | 2010-08-24 18:12:00 -0700 | [diff] [blame] | 510 | } |
| 511 | |
| 512 | return 0; |
| 513 | } |
| 514 | |
Boris Brezillon | c2b7845 | 2016-02-03 20:10:30 +0100 | [diff] [blame] | 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 | |
OuYang ZhiZhong | 6de5649 | 2018-03-11 15:59:07 +0800 | [diff] [blame] | 529 | ret = mtd_ooblayout_ecc(mtd, section++, &oobregion); |
Boris Brezillon | c2b7845 | 2016-02-03 20:10:30 +0100 | [diff] [blame] | 530 | if (ret < 0) { |
| 531 | if (ret != -ERANGE) |
| 532 | return ret; |
| 533 | |
| 534 | break; |
| 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 | } |
| 545 | } |
| 546 | |
| 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 | |
| 562 | return 0; |
| 563 | } |
| 564 | |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 565 | static int mtdchar_blkpg_ioctl(struct mtd_info *mtd, |
Brian Norris | 53bb724 | 2015-09-21 13:26:59 -0700 | [diff] [blame] | 566 | struct blkpg_ioctl_arg *arg) |
Roman Tereshonkov | d0f7959 | 2010-09-17 13:31:42 +0300 | [diff] [blame] | 567 | { |
Roman Tereshonkov | d0f7959 | 2010-09-17 13:31:42 +0300 | [diff] [blame] | 568 | struct blkpg_partition p; |
| 569 | |
| 570 | if (!capable(CAP_SYS_ADMIN)) |
| 571 | return -EPERM; |
| 572 | |
Brian Norris | 53bb724 | 2015-09-21 13:26:59 -0700 | [diff] [blame] | 573 | if (copy_from_user(&p, arg->data, sizeof(p))) |
Roman Tereshonkov | d0f7959 | 2010-09-17 13:31:42 +0300 | [diff] [blame] | 574 | return -EFAULT; |
| 575 | |
Brian Norris | 53bb724 | 2015-09-21 13:26:59 -0700 | [diff] [blame] | 576 | switch (arg->op) { |
Roman Tereshonkov | d0f7959 | 2010-09-17 13:31:42 +0300 | [diff] [blame] | 577 | case BLKPG_ADD_PARTITION: |
| 578 | |
Roman Tereshonkov | a7e93dc | 2010-11-23 14:17:17 +0200 | [diff] [blame] | 579 | /* Only master mtd device must be used to add partitions */ |
| 580 | if (mtd_is_partition(mtd)) |
| 581 | return -EINVAL; |
| 582 | |
Brian Norris | 1cc8d84 | 2014-07-21 19:08:13 -0700 | [diff] [blame] | 583 | /* Sanitize user input */ |
| 584 | p.devname[BLKPG_DEVNAMELTH - 1] = '\0'; |
| 585 | |
Roman Tereshonkov | d0f7959 | 2010-09-17 13:31:42 +0300 | [diff] [blame] | 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 | } |
Roman Tereshonkov | d0f7959 | 2010-09-17 13:31:42 +0300 | [diff] [blame] | 599 | |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 600 | static int mtdchar_write_ioctl(struct mtd_info *mtd, |
Brian Norris | e99d8b0 | 2011-09-09 09:59:03 -0700 | [diff] [blame] | 601 | struct mtd_write_req __user *argp) |
| 602 | { |
| 603 | struct mtd_write_req req; |
| 604 | struct mtd_oob_ops ops; |
Geert Uytterhoeven | f62cde4 | 2014-05-01 20:40:54 +0200 | [diff] [blame] | 605 | const void __user *usr_data, *usr_oob; |
Brian Norris | e99d8b0 | 2011-09-09 09:59:03 -0700 | [diff] [blame] | 606 | int ret; |
| 607 | |
Geert Uytterhoeven | f62cde4 | 2014-05-01 20:40:54 +0200 | [diff] [blame] | 608 | if (copy_from_user(&req, argp, sizeof(req))) |
Brian Norris | e99d8b0 | 2011-09-09 09:59:03 -0700 | [diff] [blame] | 609 | return -EFAULT; |
Geert Uytterhoeven | f62cde4 | 2014-05-01 20:40:54 +0200 | [diff] [blame] | 610 | |
| 611 | usr_data = (const void __user *)(uintptr_t)req.usr_data; |
| 612 | usr_oob = (const void __user *)(uintptr_t)req.usr_oob; |
Geert Uytterhoeven | f62cde4 | 2014-05-01 20:40:54 +0200 | [diff] [blame] | 613 | |
Artem Bityutskiy | 3c3c10b | 2012-01-30 14:58:32 +0200 | [diff] [blame] | 614 | if (!mtd->_write_oob) |
Brian Norris | e99d8b0 | 2011-09-09 09:59:03 -0700 | [diff] [blame] | 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 | |
Geert Uytterhoeven | f62cde4 | 2014-05-01 20:40:54 +0200 | [diff] [blame] | 622 | if (usr_data) { |
Brian Norris | e99d8b0 | 2011-09-09 09:59:03 -0700 | [diff] [blame] | 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 | |
Geert Uytterhoeven | f62cde4 | 2014-05-01 20:40:54 +0200 | [diff] [blame] | 630 | if (usr_oob) { |
Brian Norris | e99d8b0 | 2011-09-09 09:59:03 -0700 | [diff] [blame] | 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 | |
Artem Bityutskiy | a2cc5ba | 2011-12-23 18:29:55 +0200 | [diff] [blame] | 640 | ret = mtd_write_oob(mtd, (loff_t)req.start, &ops); |
Brian Norris | e99d8b0 | 2011-09-09 09:59:03 -0700 | [diff] [blame] | 641 | |
| 642 | kfree(ops.datbuf); |
| 643 | kfree(ops.oobbuf); |
| 644 | |
| 645 | return ret; |
| 646 | } |
| 647 | |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 648 | static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | { |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 650 | struct mtd_file_info *mfi = file->private_data; |
| 651 | struct mtd_info *mtd = mfi->mtd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | void __user *argp = (void __user *)arg; |
| 653 | int ret = 0; |
Joern Engel | 73c619e | 2006-05-30 14:25:35 +0200 | [diff] [blame] | 654 | struct mtd_info_user info; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 655 | |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 656 | pr_debug("MTD_ioctl\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Zev Weiss | b67c5f8 | 2008-09-01 05:02:12 -0700 | [diff] [blame] | 666 | uint32_t ur_idx; |
| 667 | struct mtd_erase_region_info *kr; |
H Hartley Sweeten | bcc98a4 | 2010-01-15 11:25:38 -0700 | [diff] [blame] | 668 | struct region_info_user __user *ur = argp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | |
Zev Weiss | b67c5f8 | 2008-09-01 05:02:12 -0700 | [diff] [blame] | 670 | if (get_user(ur_idx, &(ur->regionindex))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | return -EFAULT; |
| 672 | |
Dan Carpenter | 5e59be1 | 2010-09-08 21:39:56 +0200 | [diff] [blame] | 673 | if (ur_idx >= mtd->numeraseregions) |
| 674 | return -EINVAL; |
| 675 | |
Zev Weiss | b67c5f8 | 2008-09-01 05:02:12 -0700 | [diff] [blame] | 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))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | return -EFAULT; |
Zev Weiss | b67c5f8 | 2008-09-01 05:02:12 -0700 | [diff] [blame] | 682 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | break; |
| 684 | } |
| 685 | |
| 686 | case MEMGETINFO: |
Vasiliy Kulikov | a0c5a39 | 2010-11-06 17:41:24 +0300 | [diff] [blame] | 687 | memset(&info, 0, sizeof(info)); |
Joern Engel | 73c619e | 2006-05-30 14:25:35 +0200 | [diff] [blame] | 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; |
Brian Norris | 19fb434 | 2011-08-30 18:45:46 -0700 | [diff] [blame] | 694 | /* The below field is obsolete */ |
| 695 | info.padding = 0; |
Joern Engel | 73c619e | 2006-05-30 14:25:35 +0200 | [diff] [blame] | 696 | if (copy_to_user(argp, &info, sizeof(struct mtd_info_user))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | return -EFAULT; |
| 698 | break; |
| 699 | |
| 700 | case MEMERASE: |
Kevin Cernekee | 0dc54e9 | 2009-04-08 22:52:28 -0700 | [diff] [blame] | 701 | case MEMERASE64: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | { |
| 703 | struct erase_info *erase; |
| 704 | |
Al Viro | aeb5d72 | 2008-09-02 15:28:45 -0400 | [diff] [blame] | 705 | if(!(file->f_mode & FMODE_WRITE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | return -EPERM; |
| 707 | |
Burman Yan | 95b93a0 | 2006-11-15 21:10:29 +0200 | [diff] [blame] | 708 | erase=kzalloc(sizeof(struct erase_info),GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | if (!erase) |
| 710 | ret = -ENOMEM; |
| 711 | else { |
Kevin Cernekee | 0dc54e9 | 2009-04-08 22:52:28 -0700 | [diff] [blame] | 712 | if (cmd == MEMERASE64) { |
| 713 | struct erase_info_user64 einfo64; |
| 714 | |
| 715 | if (copy_from_user(&einfo64, argp, |
| 716 | sizeof(struct erase_info_user64))) { |
| 717 | kfree(erase); |
| 718 | return -EFAULT; |
| 719 | } |
| 720 | erase->addr = einfo64.start; |
| 721 | erase->len = einfo64.length; |
| 722 | } else { |
| 723 | struct erase_info_user einfo32; |
| 724 | |
| 725 | if (copy_from_user(&einfo32, argp, |
| 726 | sizeof(struct erase_info_user))) { |
| 727 | kfree(erase); |
| 728 | return -EFAULT; |
| 729 | } |
| 730 | erase->addr = einfo32.start; |
| 731 | erase->len = einfo32.length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | } |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 733 | |
Artem Bityutskiy | 7e1f0dc | 2011-12-23 15:25:39 +0200 | [diff] [blame] | 734 | ret = mtd_erase(mtd, erase); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | kfree(erase); |
| 736 | } |
| 737 | break; |
| 738 | } |
| 739 | |
| 740 | case MEMWRITEOOB: |
| 741 | { |
| 742 | struct mtd_oob_buf buf; |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 743 | struct mtd_oob_buf __user *buf_user = argp; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 744 | |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 745 | /* NOTE: writes return length to buf_user->length */ |
| 746 | if (copy_from_user(&buf, argp, sizeof(buf))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | ret = -EFAULT; |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 748 | else |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 749 | ret = mtdchar_writeoob(file, mtd, buf.start, buf.length, |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 750 | buf.ptr, &buf_user->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | } |
| 753 | |
| 754 | case MEMREADOOB: |
| 755 | { |
| 756 | struct mtd_oob_buf buf; |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 757 | struct mtd_oob_buf __user *buf_user = argp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 759 | /* NOTE: writes return length to buf_user->start */ |
| 760 | if (copy_from_user(&buf, argp, sizeof(buf))) |
| 761 | ret = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | else |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 763 | ret = mtdchar_readoob(file, mtd, buf.start, buf.length, |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 764 | buf.ptr, &buf_user->start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | break; |
| 766 | } |
| 767 | |
Kevin Cernekee | aea7cea | 2009-04-08 22:53:49 -0700 | [diff] [blame] | 768 | case MEMWRITEOOB64: |
| 769 | { |
| 770 | struct mtd_oob_buf64 buf; |
| 771 | struct mtd_oob_buf64 __user *buf_user = argp; |
| 772 | |
| 773 | if (copy_from_user(&buf, argp, sizeof(buf))) |
| 774 | ret = -EFAULT; |
| 775 | else |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 776 | ret = mtdchar_writeoob(file, mtd, buf.start, buf.length, |
Kevin Cernekee | aea7cea | 2009-04-08 22:53:49 -0700 | [diff] [blame] | 777 | (void __user *)(uintptr_t)buf.usr_ptr, |
| 778 | &buf_user->length); |
| 779 | break; |
| 780 | } |
| 781 | |
| 782 | case MEMREADOOB64: |
| 783 | { |
| 784 | struct mtd_oob_buf64 buf; |
| 785 | struct mtd_oob_buf64 __user *buf_user = argp; |
| 786 | |
| 787 | if (copy_from_user(&buf, argp, sizeof(buf))) |
| 788 | ret = -EFAULT; |
| 789 | else |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 790 | ret = mtdchar_readoob(file, mtd, buf.start, buf.length, |
Kevin Cernekee | aea7cea | 2009-04-08 22:53:49 -0700 | [diff] [blame] | 791 | (void __user *)(uintptr_t)buf.usr_ptr, |
| 792 | &buf_user->length); |
| 793 | break; |
| 794 | } |
| 795 | |
Brian Norris | e99d8b0 | 2011-09-09 09:59:03 -0700 | [diff] [blame] | 796 | case MEMWRITE: |
| 797 | { |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 798 | ret = mtdchar_write_ioctl(mtd, |
Brian Norris | e99d8b0 | 2011-09-09 09:59:03 -0700 | [diff] [blame] | 799 | (struct mtd_write_req __user *)arg); |
| 800 | break; |
| 801 | } |
| 802 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | case MEMLOCK: |
| 804 | { |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 805 | struct erase_info_user einfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 807 | if (copy_from_user(&einfo, argp, sizeof(einfo))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | return -EFAULT; |
| 809 | |
Artem Bityutskiy | 3813456 | 2011-12-30 17:00:35 +0200 | [diff] [blame] | 810 | ret = mtd_lock(mtd, einfo.start, einfo.length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | break; |
| 812 | } |
| 813 | |
| 814 | case MEMUNLOCK: |
| 815 | { |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 816 | struct erase_info_user einfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 818 | if (copy_from_user(&einfo, argp, sizeof(einfo))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | return -EFAULT; |
| 820 | |
Artem Bityutskiy | 3813456 | 2011-12-30 17:00:35 +0200 | [diff] [blame] | 821 | ret = mtd_unlock(mtd, einfo.start, einfo.length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | break; |
| 823 | } |
| 824 | |
Richard Cochran | 9938424 | 2010-06-14 18:10:33 +0200 | [diff] [blame] | 825 | case MEMISLOCKED: |
| 826 | { |
| 827 | struct erase_info_user einfo; |
| 828 | |
| 829 | if (copy_from_user(&einfo, argp, sizeof(einfo))) |
| 830 | return -EFAULT; |
| 831 | |
Artem Bityutskiy | 3813456 | 2011-12-30 17:00:35 +0200 | [diff] [blame] | 832 | ret = mtd_is_locked(mtd, einfo.start, einfo.length); |
Richard Cochran | 9938424 | 2010-06-14 18:10:33 +0200 | [diff] [blame] | 833 | break; |
| 834 | } |
| 835 | |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 836 | /* Legacy interface */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | case MEMGETOOBSEL: |
| 838 | { |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 839 | struct nand_oobinfo oi; |
| 840 | |
Boris Brezillon | adbbc3b | 2016-02-03 19:01:31 +0100 | [diff] [blame] | 841 | if (!mtd->ooblayout) |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 842 | return -EOPNOTSUPP; |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 843 | |
Boris Brezillon | c2b7845 | 2016-02-03 20:10:30 +0100 | [diff] [blame] | 844 | ret = get_oobinfo(mtd, &oi); |
| 845 | if (ret) |
| 846 | return ret; |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 847 | |
| 848 | if (copy_to_user(argp, &oi, sizeof(struct nand_oobinfo))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | return -EFAULT; |
| 850 | break; |
| 851 | } |
| 852 | |
| 853 | case MEMGETBADBLOCK: |
| 854 | { |
| 855 | loff_t offs; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 856 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | if (copy_from_user(&offs, argp, sizeof(loff_t))) |
| 858 | return -EFAULT; |
Artem Bityutskiy | 8f461a7 | 2012-01-02 13:48:54 +0200 | [diff] [blame] | 859 | return mtd_block_isbad(mtd, offs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | break; |
| 861 | } |
| 862 | |
| 863 | case MEMSETBADBLOCK: |
| 864 | { |
| 865 | loff_t offs; |
| 866 | |
| 867 | if (copy_from_user(&offs, argp, sizeof(loff_t))) |
| 868 | return -EFAULT; |
Artem Bityutskiy | 800ffd3 | 2012-01-02 13:59:12 +0200 | [diff] [blame] | 869 | return mtd_block_markbad(mtd, offs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | break; |
| 871 | } |
| 872 | |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 873 | case OTPSELECT: |
| 874 | { |
| 875 | int mode; |
| 876 | if (copy_from_user(&mode, argp, sizeof(int))) |
| 877 | return -EFAULT; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 878 | |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 879 | mfi->mode = MTD_FILE_MODE_NORMAL; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 880 | |
| 881 | ret = otp_select_filemode(mfi, mode); |
| 882 | |
Nicolas Pitre | 81dba48 | 2005-04-01 16:36:15 +0100 | [diff] [blame] | 883 | file->f_pos = 0; |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 884 | break; |
| 885 | } |
| 886 | |
| 887 | case OTPGETREGIONCOUNT: |
| 888 | case OTPGETREGIONINFO: |
| 889 | { |
| 890 | struct otp_info *buf = kmalloc(4096, GFP_KERNEL); |
Christian Riesch | 4b78fc42f | 2014-01-28 09:29:44 +0100 | [diff] [blame] | 891 | size_t retlen; |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 892 | if (!buf) |
| 893 | return -ENOMEM; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 894 | switch (mfi->mode) { |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 895 | case MTD_FILE_MODE_OTP_FACTORY: |
Christian Riesch | 4b78fc42f | 2014-01-28 09:29:44 +0100 | [diff] [blame] | 896 | ret = mtd_get_fact_prot_info(mtd, 4096, &retlen, buf); |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 897 | break; |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 898 | case MTD_FILE_MODE_OTP_USER: |
Christian Riesch | 4b78fc42f | 2014-01-28 09:29:44 +0100 | [diff] [blame] | 899 | ret = mtd_get_user_prot_info(mtd, 4096, &retlen, buf); |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 900 | break; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 901 | default: |
Artem Bityutskiy | 87e858a9 | 2011-12-28 18:47:46 +0200 | [diff] [blame] | 902 | ret = -EINVAL; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 903 | break; |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 904 | } |
Christian Riesch | 4b78fc42f | 2014-01-28 09:29:44 +0100 | [diff] [blame] | 905 | if (!ret) { |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 906 | if (cmd == OTPGETREGIONCOUNT) { |
Christian Riesch | 4b78fc42f | 2014-01-28 09:29:44 +0100 | [diff] [blame] | 907 | int nbr = retlen / sizeof(struct otp_info); |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 908 | ret = copy_to_user(argp, &nbr, sizeof(int)); |
| 909 | } else |
Christian Riesch | 4b78fc42f | 2014-01-28 09:29:44 +0100 | [diff] [blame] | 910 | ret = copy_to_user(argp, buf, retlen); |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 911 | if (ret) |
| 912 | ret = -EFAULT; |
| 913 | } |
| 914 | kfree(buf); |
| 915 | break; |
| 916 | } |
| 917 | |
| 918 | case OTPLOCK: |
| 919 | { |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 920 | struct otp_info oinfo; |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 921 | |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 922 | if (mfi->mode != MTD_FILE_MODE_OTP_USER) |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 923 | return -EINVAL; |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 924 | if (copy_from_user(&oinfo, argp, sizeof(oinfo))) |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 925 | return -EFAULT; |
Artem Bityutskiy | 4403dbfb | 2011-12-23 18:55:49 +0200 | [diff] [blame] | 926 | ret = mtd_lock_user_prot_reg(mtd, oinfo.start, oinfo.length); |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 927 | break; |
| 928 | } |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 929 | |
Brian Norris | 7854d3f | 2011-06-23 14:12:08 -0700 | [diff] [blame] | 930 | /* This ioctl is being deprecated - it truncates the ECC layout */ |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 931 | case ECCGETLAYOUT: |
| 932 | { |
Brian Norris | cc26c3c | 2010-08-24 18:12:00 -0700 | [diff] [blame] | 933 | struct nand_ecclayout_user *usrlay; |
| 934 | |
Boris Brezillon | adbbc3b | 2016-02-03 19:01:31 +0100 | [diff] [blame] | 935 | if (!mtd->ooblayout) |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 936 | return -EOPNOTSUPP; |
| 937 | |
Brian Norris | cc26c3c | 2010-08-24 18:12:00 -0700 | [diff] [blame] | 938 | usrlay = kmalloc(sizeof(*usrlay), GFP_KERNEL); |
| 939 | if (!usrlay) |
| 940 | return -ENOMEM; |
| 941 | |
Boris Brezillon | c2b7845 | 2016-02-03 20:10:30 +0100 | [diff] [blame] | 942 | shrink_ecclayout(mtd, usrlay); |
Brian Norris | cc26c3c | 2010-08-24 18:12:00 -0700 | [diff] [blame] | 943 | |
| 944 | if (copy_to_user(argp, usrlay, sizeof(*usrlay))) |
| 945 | ret = -EFAULT; |
| 946 | kfree(usrlay); |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 947 | break; |
| 948 | } |
| 949 | |
| 950 | case ECCGETSTATS: |
| 951 | { |
| 952 | if (copy_to_user(argp, &mtd->ecc_stats, |
| 953 | sizeof(struct mtd_ecc_stats))) |
| 954 | return -EFAULT; |
| 955 | break; |
| 956 | } |
| 957 | |
| 958 | case MTDFILEMODE: |
| 959 | { |
| 960 | mfi->mode = 0; |
| 961 | |
| 962 | switch(arg) { |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 963 | case MTD_FILE_MODE_OTP_FACTORY: |
| 964 | case MTD_FILE_MODE_OTP_USER: |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 965 | ret = otp_select_filemode(mfi, arg); |
| 966 | break; |
| 967 | |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 968 | case MTD_FILE_MODE_RAW: |
Artem Bityutskiy | fc002e3 | 2011-12-28 18:35:07 +0200 | [diff] [blame] | 969 | if (!mtd_has_oob(mtd)) |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 970 | return -EOPNOTSUPP; |
| 971 | mfi->mode = arg; |
| 972 | |
Brian Norris | beb133f | 2011-08-30 18:45:41 -0700 | [diff] [blame] | 973 | case MTD_FILE_MODE_NORMAL: |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 974 | break; |
| 975 | default: |
| 976 | ret = -EINVAL; |
| 977 | } |
| 978 | file->f_pos = 0; |
| 979 | break; |
| 980 | } |
| 981 | |
Roman Tereshonkov | d0f7959 | 2010-09-17 13:31:42 +0300 | [diff] [blame] | 982 | case BLKPG: |
| 983 | { |
Brian Norris | 53bb724 | 2015-09-21 13:26:59 -0700 | [diff] [blame] | 984 | struct blkpg_ioctl_arg __user *blk_arg = argp; |
| 985 | struct blkpg_ioctl_arg a; |
| 986 | |
| 987 | if (copy_from_user(&a, blk_arg, sizeof(a))) |
| 988 | ret = -EFAULT; |
| 989 | else |
| 990 | ret = mtdchar_blkpg_ioctl(mtd, &a); |
Roman Tereshonkov | d0f7959 | 2010-09-17 13:31:42 +0300 | [diff] [blame] | 991 | break; |
| 992 | } |
| 993 | |
| 994 | case BLKRRPART: |
| 995 | { |
| 996 | /* No reread partition feature. Just return ok */ |
| 997 | ret = 0; |
| 998 | break; |
| 999 | } |
Roman Tereshonkov | d0f7959 | 2010-09-17 13:31:42 +0300 | [diff] [blame] | 1000 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | default: |
| 1002 | ret = -ENOTTY; |
| 1003 | } |
| 1004 | |
| 1005 | return ret; |
| 1006 | } /* memory_ioctl */ |
| 1007 | |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 1008 | static long mtdchar_unlocked_ioctl(struct file *file, u_int cmd, u_long arg) |
Arnd Bergmann | 5592933 | 2010-04-27 00:24:05 +0200 | [diff] [blame] | 1009 | { |
| 1010 | int ret; |
| 1011 | |
Arnd Bergmann | 5aa8294 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 1012 | mutex_lock(&mtd_mutex); |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 1013 | ret = mtdchar_ioctl(file, cmd, arg); |
Arnd Bergmann | 5aa8294 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 1014 | mutex_unlock(&mtd_mutex); |
Arnd Bergmann | 5592933 | 2010-04-27 00:24:05 +0200 | [diff] [blame] | 1015 | |
| 1016 | return ret; |
| 1017 | } |
| 1018 | |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 1019 | #ifdef CONFIG_COMPAT |
| 1020 | |
| 1021 | struct mtd_oob_buf32 { |
| 1022 | u_int32_t start; |
| 1023 | u_int32_t length; |
| 1024 | compat_caddr_t ptr; /* unsigned char* */ |
| 1025 | }; |
| 1026 | |
| 1027 | #define MEMWRITEOOB32 _IOWR('M', 3, struct mtd_oob_buf32) |
| 1028 | #define MEMREADOOB32 _IOWR('M', 4, struct mtd_oob_buf32) |
| 1029 | |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 1030 | static long mtdchar_compat_ioctl(struct file *file, unsigned int cmd, |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 1031 | unsigned long arg) |
| 1032 | { |
| 1033 | struct mtd_file_info *mfi = file->private_data; |
| 1034 | struct mtd_info *mtd = mfi->mtd; |
David Woodhouse | 0b6585c | 2009-05-29 16:09:08 +0100 | [diff] [blame] | 1035 | void __user *argp = compat_ptr(arg); |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 1036 | int ret = 0; |
| 1037 | |
Arnd Bergmann | 5aa8294 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 1038 | mutex_lock(&mtd_mutex); |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 1039 | |
| 1040 | switch (cmd) { |
| 1041 | case MEMWRITEOOB32: |
| 1042 | { |
| 1043 | struct mtd_oob_buf32 buf; |
| 1044 | struct mtd_oob_buf32 __user *buf_user = argp; |
| 1045 | |
| 1046 | if (copy_from_user(&buf, argp, sizeof(buf))) |
| 1047 | ret = -EFAULT; |
| 1048 | else |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 1049 | ret = mtdchar_writeoob(file, mtd, buf.start, |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 1050 | buf.length, compat_ptr(buf.ptr), |
| 1051 | &buf_user->length); |
| 1052 | break; |
| 1053 | } |
| 1054 | |
| 1055 | case MEMREADOOB32: |
| 1056 | { |
| 1057 | struct mtd_oob_buf32 buf; |
| 1058 | struct mtd_oob_buf32 __user *buf_user = argp; |
| 1059 | |
| 1060 | /* NOTE: writes return length to buf->start */ |
| 1061 | if (copy_from_user(&buf, argp, sizeof(buf))) |
| 1062 | ret = -EFAULT; |
| 1063 | else |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 1064 | ret = mtdchar_readoob(file, mtd, buf.start, |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 1065 | buf.length, compat_ptr(buf.ptr), |
| 1066 | &buf_user->start); |
| 1067 | break; |
| 1068 | } |
Brian Norris | 53bb724 | 2015-09-21 13:26:59 -0700 | [diff] [blame] | 1069 | |
| 1070 | case BLKPG: |
| 1071 | { |
| 1072 | /* Convert from blkpg_compat_ioctl_arg to blkpg_ioctl_arg */ |
| 1073 | struct blkpg_compat_ioctl_arg __user *uarg = argp; |
| 1074 | struct blkpg_compat_ioctl_arg compat_arg; |
| 1075 | struct blkpg_ioctl_arg a; |
| 1076 | |
| 1077 | if (copy_from_user(&compat_arg, uarg, sizeof(compat_arg))) { |
| 1078 | ret = -EFAULT; |
| 1079 | break; |
| 1080 | } |
| 1081 | |
| 1082 | memset(&a, 0, sizeof(a)); |
| 1083 | a.op = compat_arg.op; |
| 1084 | a.flags = compat_arg.flags; |
| 1085 | a.datalen = compat_arg.datalen; |
| 1086 | a.data = compat_ptr(compat_arg.data); |
| 1087 | |
| 1088 | ret = mtdchar_blkpg_ioctl(mtd, &a); |
| 1089 | break; |
| 1090 | } |
| 1091 | |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 1092 | default: |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 1093 | ret = mtdchar_ioctl(file, cmd, (unsigned long)argp); |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 1094 | } |
| 1095 | |
Arnd Bergmann | 5aa8294 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 1096 | mutex_unlock(&mtd_mutex); |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 1097 | |
| 1098 | return ret; |
| 1099 | } |
| 1100 | |
| 1101 | #endif /* CONFIG_COMPAT */ |
| 1102 | |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1103 | /* |
| 1104 | * try to determine where a shared mapping can be made |
| 1105 | * - only supported for NOMMU at the moment (MMU can't doesn't copy private |
| 1106 | * mappings) |
| 1107 | */ |
| 1108 | #ifndef CONFIG_MMU |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 1109 | static unsigned long mtdchar_get_unmapped_area(struct file *file, |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1110 | unsigned long addr, |
| 1111 | unsigned long len, |
| 1112 | unsigned long pgoff, |
| 1113 | unsigned long flags) |
| 1114 | { |
| 1115 | struct mtd_file_info *mfi = file->private_data; |
| 1116 | struct mtd_info *mtd = mfi->mtd; |
Artem Bityutskiy | cd62127 | 2011-12-30 14:31:57 +0200 | [diff] [blame] | 1117 | unsigned long offset; |
| 1118 | int ret; |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1119 | |
Artem Bityutskiy | cd62127 | 2011-12-30 14:31:57 +0200 | [diff] [blame] | 1120 | if (addr != 0) |
| 1121 | return (unsigned long) -EINVAL; |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1122 | |
Artem Bityutskiy | cd62127 | 2011-12-30 14:31:57 +0200 | [diff] [blame] | 1123 | if (len > mtd->size || pgoff >= (mtd->size >> PAGE_SHIFT)) |
| 1124 | return (unsigned long) -EINVAL; |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1125 | |
Artem Bityutskiy | cd62127 | 2011-12-30 14:31:57 +0200 | [diff] [blame] | 1126 | offset = pgoff << PAGE_SHIFT; |
| 1127 | if (offset > mtd->size - len) |
| 1128 | return (unsigned long) -EINVAL; |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1129 | |
Artem Bityutskiy | cd62127 | 2011-12-30 14:31:57 +0200 | [diff] [blame] | 1130 | ret = mtd_get_unmapped_area(mtd, len, offset, flags); |
Vladimir Zapolskiy | b999593 | 2013-10-28 18:08:15 +0200 | [diff] [blame] | 1131 | return ret == -EOPNOTSUPP ? -ENODEV : ret; |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1132 | } |
Christoph Hellwig | b4caecd | 2015-01-14 10:42:32 +0100 | [diff] [blame] | 1133 | |
| 1134 | static unsigned mtdchar_mmap_capabilities(struct file *file) |
| 1135 | { |
| 1136 | struct mtd_file_info *mfi = file->private_data; |
| 1137 | |
| 1138 | return mtd_mmap_capabilities(mfi->mtd); |
| 1139 | } |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1140 | #endif |
| 1141 | |
| 1142 | /* |
| 1143 | * set up a mapping for shared memory segments |
| 1144 | */ |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 1145 | static int mtdchar_mmap(struct file *file, struct vm_area_struct *vma) |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1146 | { |
| 1147 | #ifdef CONFIG_MMU |
| 1148 | struct mtd_file_info *mfi = file->private_data; |
| 1149 | struct mtd_info *mtd = mfi->mtd; |
Anatolij Gustschin | dd02b67 | 2010-06-15 09:30:15 +0200 | [diff] [blame] | 1150 | struct map_info *map = mtd->priv; |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1151 | |
David Woodhouse | f5cf8f0 | 2012-10-09 15:08:10 +0100 | [diff] [blame] | 1152 | /* This is broken because it assumes the MTD device is map-based |
| 1153 | and that mtd->priv is a valid struct map_info. It should be |
| 1154 | replaced with something that uses the mtd_get_unmapped_area() |
| 1155 | operation properly. */ |
| 1156 | if (0 /*mtd->type == MTD_RAM || mtd->type == MTD_ROM*/) { |
Anatolij Gustschin | dd02b67 | 2010-06-15 09:30:15 +0200 | [diff] [blame] | 1157 | #ifdef pgprot_noncached |
Linus Torvalds | 8558e4a | 2013-04-19 09:53:07 -0700 | [diff] [blame] | 1158 | if (file->f_flags & O_DSYNC || map->phys >= __pa(high_memory)) |
Anatolij Gustschin | dd02b67 | 2010-06-15 09:30:15 +0200 | [diff] [blame] | 1159 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
| 1160 | #endif |
Linus Torvalds | 8558e4a | 2013-04-19 09:53:07 -0700 | [diff] [blame] | 1161 | return vm_iomap_memory(vma, map->phys, map->size); |
Anatolij Gustschin | dd02b67 | 2010-06-15 09:30:15 +0200 | [diff] [blame] | 1162 | } |
Vladimir Zapolskiy | b999593 | 2013-10-28 18:08:15 +0200 | [diff] [blame] | 1163 | return -ENODEV; |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1164 | #else |
Vladimir Zapolskiy | b999593 | 2013-10-28 18:08:15 +0200 | [diff] [blame] | 1165 | return vma->vm_flags & VM_SHARED ? 0 : -EACCES; |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1166 | #endif |
| 1167 | } |
| 1168 | |
Arjan van de Ven | d54b1fd | 2007-02-12 00:55:34 -0800 | [diff] [blame] | 1169 | static const struct file_operations mtd_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | .owner = THIS_MODULE, |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 1171 | .llseek = mtdchar_lseek, |
| 1172 | .read = mtdchar_read, |
| 1173 | .write = mtdchar_write, |
| 1174 | .unlocked_ioctl = mtdchar_unlocked_ioctl, |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 1175 | #ifdef CONFIG_COMPAT |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 1176 | .compat_ioctl = mtdchar_compat_ioctl, |
Kevin Cernekee | 9771854 | 2009-04-08 22:53:13 -0700 | [diff] [blame] | 1177 | #endif |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 1178 | .open = mtdchar_open, |
| 1179 | .release = mtdchar_close, |
| 1180 | .mmap = mtdchar_mmap, |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1181 | #ifndef CONFIG_MMU |
Artem Bityutskiy | 969e57a | 2011-12-23 17:27:46 +0200 | [diff] [blame] | 1182 | .get_unmapped_area = mtdchar_get_unmapped_area, |
Christoph Hellwig | b4caecd | 2015-01-14 10:42:32 +0100 | [diff] [blame] | 1183 | .mmap_capabilities = mtdchar_mmap_capabilities, |
David Howells | 402d326 | 2009-02-12 10:40:00 +0000 | [diff] [blame] | 1184 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | }; |
| 1186 | |
Artem Bityutskiy | 660685d | 2013-03-14 13:27:40 +0200 | [diff] [blame] | 1187 | int __init init_mtdchar(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | { |
Kirill A. Shutemov | cd87423 | 2010-05-17 16:55:47 +0300 | [diff] [blame] | 1189 | int ret; |
David Brownell | 1f24b5a | 2009-03-26 00:42:41 -0700 | [diff] [blame] | 1190 | |
Kirill A. Shutemov | cd87423 | 2010-05-17 16:55:47 +0300 | [diff] [blame] | 1191 | ret = __register_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, |
Ben Hutchings | dad0db3 | 2010-01-29 21:00:04 +0000 | [diff] [blame] | 1192 | "mtd", &mtd_fops); |
Kirill A. Shutemov | cd87423 | 2010-05-17 16:55:47 +0300 | [diff] [blame] | 1193 | if (ret < 0) { |
Artem Bityutskiy | 57ae2b6 | 2013-03-15 12:59:36 +0200 | [diff] [blame] | 1194 | pr_err("Can't allocate major number %d for MTD\n", |
| 1195 | MTD_CHAR_MAJOR); |
Kirill A. Shutemov | cd87423 | 2010-05-17 16:55:47 +0300 | [diff] [blame] | 1196 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | } |
| 1198 | |
Kirill A. Shutemov | cd87423 | 2010-05-17 16:55:47 +0300 | [diff] [blame] | 1199 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | } |
| 1201 | |
Artem Bityutskiy | 660685d | 2013-03-14 13:27:40 +0200 | [diff] [blame] | 1202 | void __exit cleanup_mtdchar(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | { |
Ben Hutchings | dad0db3 | 2010-01-29 21:00:04 +0000 | [diff] [blame] | 1204 | __unregister_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, "mtd"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | } |
| 1206 | |
Scott James Remnant | 90160e1 | 2009-03-02 18:42:39 +0000 | [diff] [blame] | 1207 | MODULE_ALIAS_CHARDEV_MAJOR(MTD_CHAR_MAJOR); |