Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006-2007 Nokia Corporation |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License version 2 as published by |
| 6 | * the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; see the file COPYING. If not, write to the Free Software |
| 15 | * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 16 | * |
| 17 | * Test sub-page read and write on MTD device. |
| 18 | * Author: Adrian Hunter <ext-adrian.hunter@nokia.com> |
| 19 | * |
| 20 | */ |
| 21 | |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 22 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 23 | |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 24 | #include <linux/init.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/moduleparam.h> |
| 27 | #include <linux/err.h> |
| 28 | #include <linux/mtd/mtd.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 29 | #include <linux/slab.h> |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 30 | #include <linux/sched.h> |
Akinobu Mita | a312b78 | 2013-02-27 17:05:39 -0800 | [diff] [blame] | 31 | #include <linux/random.h> |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 32 | |
Wolfram Sang | 7406060 | 2011-10-30 00:11:53 +0200 | [diff] [blame] | 33 | static int dev = -EINVAL; |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 34 | module_param(dev, int, S_IRUGO); |
| 35 | MODULE_PARM_DESC(dev, "MTD device number to use"); |
| 36 | |
| 37 | static struct mtd_info *mtd; |
| 38 | static unsigned char *writebuf; |
| 39 | static unsigned char *readbuf; |
| 40 | static unsigned char *bbt; |
| 41 | |
| 42 | static int subpgsize; |
| 43 | static int bufsize; |
| 44 | static int ebcnt; |
| 45 | static int pgcnt; |
| 46 | static int errcnt; |
Akinobu Mita | a312b78 | 2013-02-27 17:05:39 -0800 | [diff] [blame] | 47 | static struct rnd_state rnd_state; |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 48 | |
| 49 | static inline void clear_data(unsigned char *buf, size_t len) |
| 50 | { |
| 51 | memset(buf, 0, len); |
| 52 | } |
| 53 | |
| 54 | static int erase_eraseblock(int ebnum) |
| 55 | { |
| 56 | int err; |
| 57 | struct erase_info ei; |
| 58 | loff_t addr = ebnum * mtd->erasesize; |
| 59 | |
| 60 | memset(&ei, 0, sizeof(struct erase_info)); |
| 61 | ei.mtd = mtd; |
| 62 | ei.addr = addr; |
| 63 | ei.len = mtd->erasesize; |
| 64 | |
Artem Bityutskiy | 7e1f0dc | 2011-12-23 15:25:39 +0200 | [diff] [blame] | 65 | err = mtd_erase(mtd, &ei); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 66 | if (err) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 67 | pr_err("error %d while erasing EB %d\n", err, ebnum); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 68 | return err; |
| 69 | } |
| 70 | |
| 71 | if (ei.state == MTD_ERASE_FAILED) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 72 | pr_err("some erase error occurred at EB %d\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 73 | ebnum); |
| 74 | return -EIO; |
| 75 | } |
| 76 | |
| 77 | return 0; |
| 78 | } |
| 79 | |
| 80 | static int erase_whole_device(void) |
| 81 | { |
| 82 | int err; |
| 83 | unsigned int i; |
| 84 | |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 85 | pr_info("erasing whole device\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 86 | for (i = 0; i < ebcnt; ++i) { |
| 87 | if (bbt[i]) |
| 88 | continue; |
| 89 | err = erase_eraseblock(i); |
| 90 | if (err) |
| 91 | return err; |
| 92 | cond_resched(); |
| 93 | } |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 94 | pr_info("erased %u eraseblocks\n", i); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 95 | return 0; |
| 96 | } |
| 97 | |
| 98 | static int write_eraseblock(int ebnum) |
| 99 | { |
Artem Bityutskiy | 30fa984 | 2011-12-29 15:16:28 +0200 | [diff] [blame] | 100 | size_t written; |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 101 | int err = 0; |
| 102 | loff_t addr = ebnum * mtd->erasesize; |
| 103 | |
Akinobu Mita | a312b78 | 2013-02-27 17:05:39 -0800 | [diff] [blame] | 104 | prandom_bytes_state(&rnd_state, writebuf, subpgsize); |
Artem Bityutskiy | eda95cb | 2011-12-23 17:35:41 +0200 | [diff] [blame] | 105 | err = mtd_write(mtd, addr, subpgsize, &written, writebuf); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 106 | if (unlikely(err || written != subpgsize)) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 107 | pr_err("error: write failed at %#llx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 108 | (long long)addr); |
| 109 | if (written != subpgsize) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 110 | pr_err(" write size: %#x\n", subpgsize); |
| 111 | pr_err(" written: %#zx\n", written); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 112 | } |
| 113 | return err ? err : -1; |
| 114 | } |
| 115 | |
| 116 | addr += subpgsize; |
| 117 | |
Akinobu Mita | a312b78 | 2013-02-27 17:05:39 -0800 | [diff] [blame] | 118 | prandom_bytes_state(&rnd_state, writebuf, subpgsize); |
Artem Bityutskiy | eda95cb | 2011-12-23 17:35:41 +0200 | [diff] [blame] | 119 | err = mtd_write(mtd, addr, subpgsize, &written, writebuf); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 120 | if (unlikely(err || written != subpgsize)) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 121 | pr_err("error: write failed at %#llx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 122 | (long long)addr); |
| 123 | if (written != subpgsize) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 124 | pr_err(" write size: %#x\n", subpgsize); |
| 125 | pr_err(" written: %#zx\n", written); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 126 | } |
| 127 | return err ? err : -1; |
| 128 | } |
| 129 | |
| 130 | return err; |
| 131 | } |
| 132 | |
| 133 | static int write_eraseblock2(int ebnum) |
| 134 | { |
Artem Bityutskiy | 30fa984 | 2011-12-29 15:16:28 +0200 | [diff] [blame] | 135 | size_t written; |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 136 | int err = 0, k; |
| 137 | loff_t addr = ebnum * mtd->erasesize; |
| 138 | |
| 139 | for (k = 1; k < 33; ++k) { |
| 140 | if (addr + (subpgsize * k) > (ebnum + 1) * mtd->erasesize) |
| 141 | break; |
Akinobu Mita | a312b78 | 2013-02-27 17:05:39 -0800 | [diff] [blame] | 142 | prandom_bytes_state(&rnd_state, writebuf, subpgsize * k); |
Artem Bityutskiy | eda95cb | 2011-12-23 17:35:41 +0200 | [diff] [blame] | 143 | err = mtd_write(mtd, addr, subpgsize * k, &written, writebuf); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 144 | if (unlikely(err || written != subpgsize * k)) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 145 | pr_err("error: write failed at %#llx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 146 | (long long)addr); |
| 147 | if (written != subpgsize) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 148 | pr_err(" write size: %#x\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 149 | subpgsize * k); |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 150 | pr_err(" written: %#08zx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 151 | written); |
| 152 | } |
| 153 | return err ? err : -1; |
| 154 | } |
| 155 | addr += subpgsize * k; |
| 156 | } |
| 157 | |
| 158 | return err; |
| 159 | } |
| 160 | |
| 161 | static void print_subpage(unsigned char *p) |
| 162 | { |
| 163 | int i, j; |
| 164 | |
| 165 | for (i = 0; i < subpgsize; ) { |
| 166 | for (j = 0; i < subpgsize && j < 32; ++i, ++j) |
| 167 | printk("%02x", *p++); |
| 168 | printk("\n"); |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | static int verify_eraseblock(int ebnum) |
| 173 | { |
Artem Bityutskiy | 30fa984 | 2011-12-29 15:16:28 +0200 | [diff] [blame] | 174 | size_t read; |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 175 | int err = 0; |
| 176 | loff_t addr = ebnum * mtd->erasesize; |
| 177 | |
Akinobu Mita | a312b78 | 2013-02-27 17:05:39 -0800 | [diff] [blame] | 178 | prandom_bytes_state(&rnd_state, writebuf, subpgsize); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 179 | clear_data(readbuf, subpgsize); |
Artem Bityutskiy | 329ad39 | 2011-12-23 17:30:16 +0200 | [diff] [blame] | 180 | err = mtd_read(mtd, addr, subpgsize, &read, readbuf); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 181 | if (unlikely(err || read != subpgsize)) { |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 182 | if (mtd_is_bitflip(err) && read == subpgsize) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 183 | pr_info("ECC correction at %#llx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 184 | (long long)addr); |
| 185 | err = 0; |
| 186 | } else { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 187 | pr_err("error: read failed at %#llx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 188 | (long long)addr); |
| 189 | return err ? err : -1; |
| 190 | } |
| 191 | } |
| 192 | if (unlikely(memcmp(readbuf, writebuf, subpgsize))) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 193 | pr_err("error: verify failed at %#llx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 194 | (long long)addr); |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 195 | pr_info("------------- written----------------\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 196 | print_subpage(writebuf); |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 197 | pr_info("------------- read ------------------\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 198 | print_subpage(readbuf); |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 199 | pr_info("-------------------------------------\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 200 | errcnt += 1; |
| 201 | } |
| 202 | |
| 203 | addr += subpgsize; |
| 204 | |
Akinobu Mita | a312b78 | 2013-02-27 17:05:39 -0800 | [diff] [blame] | 205 | prandom_bytes_state(&rnd_state, writebuf, subpgsize); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 206 | clear_data(readbuf, subpgsize); |
Artem Bityutskiy | 329ad39 | 2011-12-23 17:30:16 +0200 | [diff] [blame] | 207 | err = mtd_read(mtd, addr, subpgsize, &read, readbuf); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 208 | if (unlikely(err || read != subpgsize)) { |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 209 | if (mtd_is_bitflip(err) && read == subpgsize) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 210 | pr_info("ECC correction at %#llx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 211 | (long long)addr); |
| 212 | err = 0; |
| 213 | } else { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 214 | pr_err("error: read failed at %#llx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 215 | (long long)addr); |
| 216 | return err ? err : -1; |
| 217 | } |
| 218 | } |
| 219 | if (unlikely(memcmp(readbuf, writebuf, subpgsize))) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 220 | pr_info("error: verify failed at %#llx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 221 | (long long)addr); |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 222 | pr_info("------------- written----------------\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 223 | print_subpage(writebuf); |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 224 | pr_info("------------- read ------------------\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 225 | print_subpage(readbuf); |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 226 | pr_info("-------------------------------------\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 227 | errcnt += 1; |
| 228 | } |
| 229 | |
| 230 | return err; |
| 231 | } |
| 232 | |
| 233 | static int verify_eraseblock2(int ebnum) |
| 234 | { |
Artem Bityutskiy | 30fa984 | 2011-12-29 15:16:28 +0200 | [diff] [blame] | 235 | size_t read; |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 236 | int err = 0, k; |
| 237 | loff_t addr = ebnum * mtd->erasesize; |
| 238 | |
| 239 | for (k = 1; k < 33; ++k) { |
| 240 | if (addr + (subpgsize * k) > (ebnum + 1) * mtd->erasesize) |
| 241 | break; |
Akinobu Mita | a312b78 | 2013-02-27 17:05:39 -0800 | [diff] [blame] | 242 | prandom_bytes_state(&rnd_state, writebuf, subpgsize * k); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 243 | clear_data(readbuf, subpgsize * k); |
Artem Bityutskiy | 329ad39 | 2011-12-23 17:30:16 +0200 | [diff] [blame] | 244 | err = mtd_read(mtd, addr, subpgsize * k, &read, readbuf); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 245 | if (unlikely(err || read != subpgsize * k)) { |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 246 | if (mtd_is_bitflip(err) && read == subpgsize * k) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 247 | pr_info("ECC correction at %#llx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 248 | (long long)addr); |
| 249 | err = 0; |
| 250 | } else { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 251 | pr_err("error: read failed at " |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 252 | "%#llx\n", (long long)addr); |
| 253 | return err ? err : -1; |
| 254 | } |
| 255 | } |
| 256 | if (unlikely(memcmp(readbuf, writebuf, subpgsize * k))) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 257 | pr_err("error: verify failed at %#llx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 258 | (long long)addr); |
| 259 | errcnt += 1; |
| 260 | } |
| 261 | addr += subpgsize * k; |
| 262 | } |
| 263 | |
| 264 | return err; |
| 265 | } |
| 266 | |
| 267 | static int verify_eraseblock_ff(int ebnum) |
| 268 | { |
| 269 | uint32_t j; |
Artem Bityutskiy | 30fa984 | 2011-12-29 15:16:28 +0200 | [diff] [blame] | 270 | size_t read; |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 271 | int err = 0; |
| 272 | loff_t addr = ebnum * mtd->erasesize; |
| 273 | |
| 274 | memset(writebuf, 0xff, subpgsize); |
| 275 | for (j = 0; j < mtd->erasesize / subpgsize; ++j) { |
| 276 | clear_data(readbuf, subpgsize); |
Artem Bityutskiy | 329ad39 | 2011-12-23 17:30:16 +0200 | [diff] [blame] | 277 | err = mtd_read(mtd, addr, subpgsize, &read, readbuf); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 278 | if (unlikely(err || read != subpgsize)) { |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 279 | if (mtd_is_bitflip(err) && read == subpgsize) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 280 | pr_info("ECC correction at %#llx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 281 | (long long)addr); |
| 282 | err = 0; |
| 283 | } else { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 284 | pr_err("error: read failed at " |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 285 | "%#llx\n", (long long)addr); |
| 286 | return err ? err : -1; |
| 287 | } |
| 288 | } |
| 289 | if (unlikely(memcmp(readbuf, writebuf, subpgsize))) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 290 | pr_err("error: verify 0xff failed at " |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 291 | "%#llx\n", (long long)addr); |
| 292 | errcnt += 1; |
| 293 | } |
| 294 | addr += subpgsize; |
| 295 | } |
| 296 | |
| 297 | return err; |
| 298 | } |
| 299 | |
| 300 | static int verify_all_eraseblocks_ff(void) |
| 301 | { |
| 302 | int err; |
| 303 | unsigned int i; |
| 304 | |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 305 | pr_info("verifying all eraseblocks for 0xff\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 306 | for (i = 0; i < ebcnt; ++i) { |
| 307 | if (bbt[i]) |
| 308 | continue; |
| 309 | err = verify_eraseblock_ff(i); |
| 310 | if (err) |
| 311 | return err; |
| 312 | if (i % 256 == 0) |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 313 | pr_info("verified up to eraseblock %u\n", i); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 314 | cond_resched(); |
| 315 | } |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 316 | pr_info("verified %u eraseblocks\n", i); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | static int is_block_bad(int ebnum) |
| 321 | { |
| 322 | loff_t addr = ebnum * mtd->erasesize; |
| 323 | int ret; |
| 324 | |
Artem Bityutskiy | 7086c19 | 2011-12-23 19:35:30 +0200 | [diff] [blame] | 325 | ret = mtd_block_isbad(mtd, addr); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 326 | if (ret) |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 327 | pr_info("block %d is bad\n", ebnum); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 328 | return ret; |
| 329 | } |
| 330 | |
| 331 | static int scan_for_bad_eraseblocks(void) |
| 332 | { |
| 333 | int i, bad = 0; |
| 334 | |
Julia Lawall | 2bfefa4 | 2010-05-13 22:03:15 +0200 | [diff] [blame] | 335 | bbt = kzalloc(ebcnt, GFP_KERNEL); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 336 | if (!bbt) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 337 | pr_err("error: cannot allocate memory\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 338 | return -ENOMEM; |
| 339 | } |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 340 | |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 341 | pr_info("scanning for bad eraseblocks\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 342 | for (i = 0; i < ebcnt; ++i) { |
| 343 | bbt[i] = is_block_bad(i) ? 1 : 0; |
| 344 | if (bbt[i]) |
| 345 | bad += 1; |
| 346 | cond_resched(); |
| 347 | } |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 348 | pr_info("scanned %d eraseblocks, %d are bad\n", i, bad); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | static int __init mtd_subpagetest_init(void) |
| 353 | { |
| 354 | int err = 0; |
| 355 | uint32_t i; |
| 356 | uint64_t tmp; |
| 357 | |
| 358 | printk(KERN_INFO "\n"); |
| 359 | printk(KERN_INFO "=================================================\n"); |
Wolfram Sang | 7406060 | 2011-10-30 00:11:53 +0200 | [diff] [blame] | 360 | |
| 361 | if (dev < 0) { |
Masanari Iida | 064a769 | 2012-11-09 23:20:58 +0900 | [diff] [blame] | 362 | pr_info("Please specify a valid mtd-device via module parameter\n"); |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 363 | pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n"); |
Wolfram Sang | 7406060 | 2011-10-30 00:11:53 +0200 | [diff] [blame] | 364 | return -EINVAL; |
| 365 | } |
| 366 | |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 367 | pr_info("MTD device: %d\n", dev); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 368 | |
| 369 | mtd = get_mtd_device(NULL, dev); |
| 370 | if (IS_ERR(mtd)) { |
| 371 | err = PTR_ERR(mtd); |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 372 | pr_err("error: cannot get MTD device\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 373 | return err; |
| 374 | } |
| 375 | |
| 376 | if (mtd->type != MTD_NANDFLASH) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 377 | pr_info("this test requires NAND flash\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 378 | goto out; |
| 379 | } |
| 380 | |
| 381 | subpgsize = mtd->writesize >> mtd->subpage_sft; |
Roman Tereshonkov | 7b7e905 | 2011-02-03 13:45:56 +0200 | [diff] [blame] | 382 | tmp = mtd->size; |
| 383 | do_div(tmp, mtd->erasesize); |
| 384 | ebcnt = tmp; |
| 385 | pgcnt = mtd->erasesize / mtd->writesize; |
| 386 | |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 387 | pr_info("MTD device size %llu, eraseblock size %u, " |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 388 | "page size %u, subpage size %u, count of eraseblocks %u, " |
| 389 | "pages per eraseblock %u, OOB size %u\n", |
| 390 | (unsigned long long)mtd->size, mtd->erasesize, |
| 391 | mtd->writesize, subpgsize, ebcnt, pgcnt, mtd->oobsize); |
| 392 | |
| 393 | err = -ENOMEM; |
| 394 | bufsize = subpgsize * 32; |
| 395 | writebuf = kmalloc(bufsize, GFP_KERNEL); |
| 396 | if (!writebuf) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 397 | pr_info("error: cannot allocate memory\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 398 | goto out; |
| 399 | } |
| 400 | readbuf = kmalloc(bufsize, GFP_KERNEL); |
| 401 | if (!readbuf) { |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 402 | pr_info("error: cannot allocate memory\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 403 | goto out; |
| 404 | } |
| 405 | |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 406 | err = scan_for_bad_eraseblocks(); |
| 407 | if (err) |
| 408 | goto out; |
| 409 | |
| 410 | err = erase_whole_device(); |
| 411 | if (err) |
| 412 | goto out; |
| 413 | |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 414 | pr_info("writing whole device\n"); |
Akinobu Mita | a312b78 | 2013-02-27 17:05:39 -0800 | [diff] [blame] | 415 | prandom_seed_state(&rnd_state, 1); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 416 | for (i = 0; i < ebcnt; ++i) { |
| 417 | if (bbt[i]) |
| 418 | continue; |
| 419 | err = write_eraseblock(i); |
| 420 | if (unlikely(err)) |
| 421 | goto out; |
| 422 | if (i % 256 == 0) |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 423 | pr_info("written up to eraseblock %u\n", i); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 424 | cond_resched(); |
| 425 | } |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 426 | pr_info("written %u eraseblocks\n", i); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 427 | |
Akinobu Mita | a312b78 | 2013-02-27 17:05:39 -0800 | [diff] [blame] | 428 | prandom_seed_state(&rnd_state, 1); |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 429 | pr_info("verifying all eraseblocks\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 430 | for (i = 0; i < ebcnt; ++i) { |
| 431 | if (bbt[i]) |
| 432 | continue; |
| 433 | err = verify_eraseblock(i); |
| 434 | if (unlikely(err)) |
| 435 | goto out; |
| 436 | if (i % 256 == 0) |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 437 | pr_info("verified up to eraseblock %u\n", i); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 438 | cond_resched(); |
| 439 | } |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 440 | pr_info("verified %u eraseblocks\n", i); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 441 | |
| 442 | err = erase_whole_device(); |
| 443 | if (err) |
| 444 | goto out; |
| 445 | |
| 446 | err = verify_all_eraseblocks_ff(); |
| 447 | if (err) |
| 448 | goto out; |
| 449 | |
| 450 | /* Write all eraseblocks */ |
Akinobu Mita | a312b78 | 2013-02-27 17:05:39 -0800 | [diff] [blame] | 451 | prandom_seed_state(&rnd_state, 3); |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 452 | pr_info("writing whole device\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 453 | for (i = 0; i < ebcnt; ++i) { |
| 454 | if (bbt[i]) |
| 455 | continue; |
| 456 | err = write_eraseblock2(i); |
| 457 | if (unlikely(err)) |
| 458 | goto out; |
| 459 | if (i % 256 == 0) |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 460 | pr_info("written up to eraseblock %u\n", i); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 461 | cond_resched(); |
| 462 | } |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 463 | pr_info("written %u eraseblocks\n", i); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 464 | |
| 465 | /* Check all eraseblocks */ |
Akinobu Mita | a312b78 | 2013-02-27 17:05:39 -0800 | [diff] [blame] | 466 | prandom_seed_state(&rnd_state, 3); |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 467 | pr_info("verifying all eraseblocks\n"); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 468 | for (i = 0; i < ebcnt; ++i) { |
| 469 | if (bbt[i]) |
| 470 | continue; |
| 471 | err = verify_eraseblock2(i); |
| 472 | if (unlikely(err)) |
| 473 | goto out; |
| 474 | if (i % 256 == 0) |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 475 | pr_info("verified up to eraseblock %u\n", i); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 476 | cond_resched(); |
| 477 | } |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 478 | pr_info("verified %u eraseblocks\n", i); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 479 | |
| 480 | err = erase_whole_device(); |
| 481 | if (err) |
| 482 | goto out; |
| 483 | |
| 484 | err = verify_all_eraseblocks_ff(); |
| 485 | if (err) |
| 486 | goto out; |
| 487 | |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 488 | pr_info("finished with %d errors\n", errcnt); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 489 | |
| 490 | out: |
| 491 | kfree(bbt); |
| 492 | kfree(readbuf); |
| 493 | kfree(writebuf); |
| 494 | put_mtd_device(mtd); |
| 495 | if (err) |
Vikram Narayanan | cd66a2d | 2012-10-10 23:11:06 +0530 | [diff] [blame] | 496 | pr_info("error %d occurred\n", err); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 497 | printk(KERN_INFO "=================================================\n"); |
| 498 | return err; |
| 499 | } |
| 500 | module_init(mtd_subpagetest_init); |
| 501 | |
| 502 | static void __exit mtd_subpagetest_exit(void) |
| 503 | { |
| 504 | return; |
| 505 | } |
| 506 | module_exit(mtd_subpagetest_exit); |
| 507 | |
| 508 | MODULE_DESCRIPTION("Subpage test module"); |
| 509 | MODULE_AUTHOR("Adrian Hunter"); |
| 510 | MODULE_LICENSE("GPL"); |