Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2006-2008 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 page read and write on MTD device. |
| 18 | * |
| 19 | * Author: Adrian Hunter <ext-adrian.hunter@nokia.com> |
| 20 | */ |
| 21 | |
| 22 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 23 | |
| 24 | #include <asm/div64.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/moduleparam.h> |
| 28 | #include <linux/err.h> |
| 29 | #include <linux/mtd/mtd.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/sched.h> |
| 32 | #include <linux/random.h> |
| 33 | |
| 34 | #include "mtd_test.h" |
| 35 | |
| 36 | static int dev = -EINVAL; |
| 37 | module_param(dev, int, S_IRUGO); |
| 38 | MODULE_PARM_DESC(dev, "MTD device number to use"); |
| 39 | |
| 40 | static struct mtd_info *mtd; |
| 41 | static unsigned char *twopages; |
| 42 | static unsigned char *writebuf; |
| 43 | static unsigned char *boundary; |
| 44 | static unsigned char *bbt; |
| 45 | |
| 46 | static int pgsize; |
| 47 | static int bufsize; |
| 48 | static int ebcnt; |
| 49 | static int pgcnt; |
| 50 | static int errcnt; |
| 51 | static struct rnd_state rnd_state; |
| 52 | |
| 53 | static int write_eraseblock(int ebnum) |
| 54 | { |
| 55 | loff_t addr = (loff_t)ebnum * mtd->erasesize; |
| 56 | |
| 57 | prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize); |
| 58 | cond_resched(); |
| 59 | return mtdtest_write(mtd, addr, mtd->erasesize, writebuf); |
| 60 | } |
| 61 | |
| 62 | static int verify_eraseblock(int ebnum) |
| 63 | { |
| 64 | uint32_t j; |
| 65 | int err = 0, i; |
| 66 | loff_t addr0, addrn; |
| 67 | loff_t addr = (loff_t)ebnum * mtd->erasesize; |
| 68 | |
| 69 | addr0 = 0; |
| 70 | for (i = 0; i < ebcnt && bbt[i]; ++i) |
| 71 | addr0 += mtd->erasesize; |
| 72 | |
| 73 | addrn = mtd->size; |
| 74 | for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i) |
| 75 | addrn -= mtd->erasesize; |
| 76 | |
| 77 | prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize); |
| 78 | for (j = 0; j < pgcnt - 1; ++j, addr += pgsize) { |
| 79 | /* Do a read to set the internal dataRAMs to different data */ |
| 80 | err = mtdtest_read(mtd, addr0, bufsize, twopages); |
| 81 | if (err) |
| 82 | return err; |
| 83 | err = mtdtest_read(mtd, addrn - bufsize, bufsize, twopages); |
| 84 | if (err) |
| 85 | return err; |
| 86 | memset(twopages, 0, bufsize); |
| 87 | err = mtdtest_read(mtd, addr, bufsize, twopages); |
| 88 | if (err) |
| 89 | break; |
| 90 | if (memcmp(twopages, writebuf + (j * pgsize), bufsize)) { |
| 91 | pr_err("error: verify failed at %#llx\n", |
| 92 | (long long)addr); |
| 93 | errcnt += 1; |
| 94 | } |
| 95 | } |
| 96 | /* Check boundary between eraseblocks */ |
| 97 | if (addr <= addrn - pgsize - pgsize && !bbt[ebnum + 1]) { |
| 98 | struct rnd_state old_state = rnd_state; |
| 99 | |
| 100 | /* Do a read to set the internal dataRAMs to different data */ |
| 101 | err = mtdtest_read(mtd, addr0, bufsize, twopages); |
| 102 | if (err) |
| 103 | return err; |
| 104 | err = mtdtest_read(mtd, addrn - bufsize, bufsize, twopages); |
| 105 | if (err) |
| 106 | return err; |
| 107 | memset(twopages, 0, bufsize); |
| 108 | err = mtdtest_read(mtd, addr, bufsize, twopages); |
| 109 | if (err) |
| 110 | return err; |
| 111 | memcpy(boundary, writebuf + mtd->erasesize - pgsize, pgsize); |
| 112 | prandom_bytes_state(&rnd_state, boundary + pgsize, pgsize); |
| 113 | if (memcmp(twopages, boundary, bufsize)) { |
| 114 | pr_err("error: verify failed at %#llx\n", |
| 115 | (long long)addr); |
| 116 | errcnt += 1; |
| 117 | } |
| 118 | rnd_state = old_state; |
| 119 | } |
| 120 | return err; |
| 121 | } |
| 122 | |
| 123 | static int crosstest(void) |
| 124 | { |
| 125 | int err = 0, i; |
| 126 | loff_t addr, addr0, addrn; |
| 127 | unsigned char *pp1, *pp2, *pp3, *pp4; |
| 128 | |
| 129 | pr_info("crosstest\n"); |
| 130 | pp1 = kmalloc(pgsize * 4, GFP_KERNEL); |
| 131 | if (!pp1) |
| 132 | return -ENOMEM; |
| 133 | pp2 = pp1 + pgsize; |
| 134 | pp3 = pp2 + pgsize; |
| 135 | pp4 = pp3 + pgsize; |
| 136 | memset(pp1, 0, pgsize * 4); |
| 137 | |
| 138 | addr0 = 0; |
| 139 | for (i = 0; i < ebcnt && bbt[i]; ++i) |
| 140 | addr0 += mtd->erasesize; |
| 141 | |
| 142 | addrn = mtd->size; |
| 143 | for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i) |
| 144 | addrn -= mtd->erasesize; |
| 145 | |
| 146 | /* Read 2nd-to-last page to pp1 */ |
| 147 | addr = addrn - pgsize - pgsize; |
| 148 | err = mtdtest_read(mtd, addr, pgsize, pp1); |
| 149 | if (err) { |
| 150 | kfree(pp1); |
| 151 | return err; |
| 152 | } |
| 153 | |
| 154 | /* Read 3rd-to-last page to pp1 */ |
| 155 | addr = addrn - pgsize - pgsize - pgsize; |
| 156 | err = mtdtest_read(mtd, addr, pgsize, pp1); |
| 157 | if (err) { |
| 158 | kfree(pp1); |
| 159 | return err; |
| 160 | } |
| 161 | |
| 162 | /* Read first page to pp2 */ |
| 163 | addr = addr0; |
| 164 | pr_info("reading page at %#llx\n", (long long)addr); |
| 165 | err = mtdtest_read(mtd, addr, pgsize, pp2); |
| 166 | if (err) { |
| 167 | kfree(pp1); |
| 168 | return err; |
| 169 | } |
| 170 | |
| 171 | /* Read last page to pp3 */ |
| 172 | addr = addrn - pgsize; |
| 173 | pr_info("reading page at %#llx\n", (long long)addr); |
| 174 | err = mtdtest_read(mtd, addr, pgsize, pp3); |
| 175 | if (err) { |
| 176 | kfree(pp1); |
| 177 | return err; |
| 178 | } |
| 179 | |
| 180 | /* Read first page again to pp4 */ |
| 181 | addr = addr0; |
| 182 | pr_info("reading page at %#llx\n", (long long)addr); |
| 183 | err = mtdtest_read(mtd, addr, pgsize, pp4); |
| 184 | if (err) { |
| 185 | kfree(pp1); |
| 186 | return err; |
| 187 | } |
| 188 | |
| 189 | /* pp2 and pp4 should be the same */ |
| 190 | pr_info("verifying pages read at %#llx match\n", |
| 191 | (long long)addr0); |
| 192 | if (memcmp(pp2, pp4, pgsize)) { |
| 193 | pr_err("verify failed!\n"); |
| 194 | errcnt += 1; |
| 195 | } else if (!err) |
| 196 | pr_info("crosstest ok\n"); |
| 197 | kfree(pp1); |
| 198 | return err; |
| 199 | } |
| 200 | |
| 201 | static int erasecrosstest(void) |
| 202 | { |
| 203 | int err = 0, i, ebnum, ebnum2; |
| 204 | loff_t addr0; |
| 205 | char *readbuf = twopages; |
| 206 | |
| 207 | pr_info("erasecrosstest\n"); |
| 208 | |
| 209 | ebnum = 0; |
| 210 | addr0 = 0; |
| 211 | for (i = 0; i < ebcnt && bbt[i]; ++i) { |
| 212 | addr0 += mtd->erasesize; |
| 213 | ebnum += 1; |
| 214 | } |
| 215 | |
| 216 | ebnum2 = ebcnt - 1; |
| 217 | while (ebnum2 && bbt[ebnum2]) |
| 218 | ebnum2 -= 1; |
| 219 | |
| 220 | pr_info("erasing block %d\n", ebnum); |
| 221 | err = mtdtest_erase_eraseblock(mtd, ebnum); |
| 222 | if (err) |
| 223 | return err; |
| 224 | |
| 225 | pr_info("writing 1st page of block %d\n", ebnum); |
| 226 | prandom_bytes_state(&rnd_state, writebuf, pgsize); |
| 227 | strcpy(writebuf, "There is no data like this!"); |
| 228 | err = mtdtest_write(mtd, addr0, pgsize, writebuf); |
| 229 | if (err) |
| 230 | return err; |
| 231 | |
| 232 | pr_info("reading 1st page of block %d\n", ebnum); |
| 233 | memset(readbuf, 0, pgsize); |
| 234 | err = mtdtest_read(mtd, addr0, pgsize, readbuf); |
| 235 | if (err) |
| 236 | return err; |
| 237 | |
| 238 | pr_info("verifying 1st page of block %d\n", ebnum); |
| 239 | if (memcmp(writebuf, readbuf, pgsize)) { |
| 240 | pr_err("verify failed!\n"); |
| 241 | errcnt += 1; |
| 242 | return -1; |
| 243 | } |
| 244 | |
| 245 | pr_info("erasing block %d\n", ebnum); |
| 246 | err = mtdtest_erase_eraseblock(mtd, ebnum); |
| 247 | if (err) |
| 248 | return err; |
| 249 | |
| 250 | pr_info("writing 1st page of block %d\n", ebnum); |
| 251 | prandom_bytes_state(&rnd_state, writebuf, pgsize); |
| 252 | strcpy(writebuf, "There is no data like this!"); |
| 253 | err = mtdtest_write(mtd, addr0, pgsize, writebuf); |
| 254 | if (err) |
| 255 | return err; |
| 256 | |
| 257 | pr_info("erasing block %d\n", ebnum2); |
| 258 | err = mtdtest_erase_eraseblock(mtd, ebnum2); |
| 259 | if (err) |
| 260 | return err; |
| 261 | |
| 262 | pr_info("reading 1st page of block %d\n", ebnum); |
| 263 | memset(readbuf, 0, pgsize); |
| 264 | err = mtdtest_read(mtd, addr0, pgsize, readbuf); |
| 265 | if (err) |
| 266 | return err; |
| 267 | |
| 268 | pr_info("verifying 1st page of block %d\n", ebnum); |
| 269 | if (memcmp(writebuf, readbuf, pgsize)) { |
| 270 | pr_err("verify failed!\n"); |
| 271 | errcnt += 1; |
| 272 | return -1; |
| 273 | } |
| 274 | |
| 275 | if (!err) |
| 276 | pr_info("erasecrosstest ok\n"); |
| 277 | return err; |
| 278 | } |
| 279 | |
| 280 | static int erasetest(void) |
| 281 | { |
| 282 | int err = 0, i, ebnum, ok = 1; |
| 283 | loff_t addr0; |
| 284 | |
| 285 | pr_info("erasetest\n"); |
| 286 | |
| 287 | ebnum = 0; |
| 288 | addr0 = 0; |
| 289 | for (i = 0; i < ebcnt && bbt[i]; ++i) { |
| 290 | addr0 += mtd->erasesize; |
| 291 | ebnum += 1; |
| 292 | } |
| 293 | |
| 294 | pr_info("erasing block %d\n", ebnum); |
| 295 | err = mtdtest_erase_eraseblock(mtd, ebnum); |
| 296 | if (err) |
| 297 | return err; |
| 298 | |
| 299 | pr_info("writing 1st page of block %d\n", ebnum); |
| 300 | prandom_bytes_state(&rnd_state, writebuf, pgsize); |
| 301 | err = mtdtest_write(mtd, addr0, pgsize, writebuf); |
| 302 | if (err) |
| 303 | return err; |
| 304 | |
| 305 | pr_info("erasing block %d\n", ebnum); |
| 306 | err = mtdtest_erase_eraseblock(mtd, ebnum); |
| 307 | if (err) |
| 308 | return err; |
| 309 | |
| 310 | pr_info("reading 1st page of block %d\n", ebnum); |
| 311 | err = mtdtest_read(mtd, addr0, pgsize, twopages); |
| 312 | if (err) |
| 313 | return err; |
| 314 | |
| 315 | pr_info("verifying 1st page of block %d is all 0xff\n", |
| 316 | ebnum); |
| 317 | for (i = 0; i < pgsize; ++i) |
| 318 | if (twopages[i] != 0xff) { |
| 319 | pr_err("verifying all 0xff failed at %d\n", |
| 320 | i); |
| 321 | errcnt += 1; |
| 322 | ok = 0; |
| 323 | break; |
| 324 | } |
| 325 | |
| 326 | if (ok && !err) |
| 327 | pr_info("erasetest ok\n"); |
| 328 | |
| 329 | return err; |
| 330 | } |
| 331 | |
| 332 | static int __init mtd_pagetest_init(void) |
| 333 | { |
| 334 | int err = 0; |
| 335 | uint64_t tmp; |
| 336 | uint32_t i; |
| 337 | |
| 338 | printk(KERN_INFO "\n"); |
| 339 | printk(KERN_INFO "=================================================\n"); |
| 340 | |
| 341 | if (dev < 0) { |
| 342 | pr_info("Please specify a valid mtd-device via module parameter\n"); |
| 343 | pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n"); |
| 344 | return -EINVAL; |
| 345 | } |
| 346 | |
| 347 | pr_info("MTD device: %d\n", dev); |
| 348 | |
| 349 | mtd = get_mtd_device(NULL, dev); |
| 350 | if (IS_ERR(mtd)) { |
| 351 | err = PTR_ERR(mtd); |
| 352 | pr_err("error: cannot get MTD device\n"); |
| 353 | return err; |
| 354 | } |
| 355 | |
| 356 | if (!mtd_type_is_nand(mtd)) { |
| 357 | pr_info("this test requires NAND flash\n"); |
| 358 | goto out; |
| 359 | } |
| 360 | |
| 361 | tmp = mtd->size; |
| 362 | do_div(tmp, mtd->erasesize); |
| 363 | ebcnt = tmp; |
| 364 | pgcnt = mtd->erasesize / mtd->writesize; |
| 365 | pgsize = mtd->writesize; |
| 366 | |
| 367 | pr_info("MTD device size %llu, eraseblock size %u, " |
| 368 | "page size %u, count of eraseblocks %u, pages per " |
| 369 | "eraseblock %u, OOB size %u\n", |
| 370 | (unsigned long long)mtd->size, mtd->erasesize, |
| 371 | pgsize, ebcnt, pgcnt, mtd->oobsize); |
| 372 | |
| 373 | err = -ENOMEM; |
| 374 | bufsize = pgsize * 2; |
| 375 | writebuf = kmalloc(mtd->erasesize, GFP_KERNEL); |
| 376 | if (!writebuf) |
| 377 | goto out; |
| 378 | twopages = kmalloc(bufsize, GFP_KERNEL); |
| 379 | if (!twopages) |
| 380 | goto out; |
| 381 | boundary = kmalloc(bufsize, GFP_KERNEL); |
| 382 | if (!boundary) |
| 383 | goto out; |
| 384 | |
| 385 | bbt = kzalloc(ebcnt, GFP_KERNEL); |
| 386 | if (!bbt) |
| 387 | goto out; |
| 388 | err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt); |
| 389 | if (err) |
| 390 | goto out; |
| 391 | |
| 392 | /* Erase all eraseblocks */ |
| 393 | pr_info("erasing whole device\n"); |
| 394 | err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); |
| 395 | if (err) |
| 396 | goto out; |
| 397 | pr_info("erased %u eraseblocks\n", ebcnt); |
| 398 | |
| 399 | /* Write all eraseblocks */ |
| 400 | prandom_seed_state(&rnd_state, 1); |
| 401 | pr_info("writing whole device\n"); |
| 402 | for (i = 0; i < ebcnt; ++i) { |
| 403 | if (bbt[i]) |
| 404 | continue; |
| 405 | err = write_eraseblock(i); |
| 406 | if (err) |
| 407 | goto out; |
| 408 | if (i % 256 == 0) |
| 409 | pr_info("written up to eraseblock %u\n", i); |
| 410 | |
| 411 | err = mtdtest_relax(); |
| 412 | if (err) |
| 413 | goto out; |
| 414 | } |
| 415 | pr_info("written %u eraseblocks\n", i); |
| 416 | |
| 417 | /* Check all eraseblocks */ |
| 418 | prandom_seed_state(&rnd_state, 1); |
| 419 | pr_info("verifying all eraseblocks\n"); |
| 420 | for (i = 0; i < ebcnt; ++i) { |
| 421 | if (bbt[i]) |
| 422 | continue; |
| 423 | err = verify_eraseblock(i); |
| 424 | if (err) |
| 425 | goto out; |
| 426 | if (i % 256 == 0) |
| 427 | pr_info("verified up to eraseblock %u\n", i); |
| 428 | |
| 429 | err = mtdtest_relax(); |
| 430 | if (err) |
| 431 | goto out; |
| 432 | } |
| 433 | pr_info("verified %u eraseblocks\n", i); |
| 434 | |
| 435 | err = crosstest(); |
| 436 | if (err) |
| 437 | goto out; |
| 438 | |
| 439 | err = erasecrosstest(); |
| 440 | if (err) |
| 441 | goto out; |
| 442 | |
| 443 | err = erasetest(); |
| 444 | if (err) |
| 445 | goto out; |
| 446 | |
| 447 | pr_info("finished with %d errors\n", errcnt); |
| 448 | out: |
| 449 | |
| 450 | kfree(bbt); |
| 451 | kfree(boundary); |
| 452 | kfree(twopages); |
| 453 | kfree(writebuf); |
| 454 | put_mtd_device(mtd); |
| 455 | if (err) |
| 456 | pr_info("error %d occurred\n", err); |
| 457 | printk(KERN_INFO "=================================================\n"); |
| 458 | return err; |
| 459 | } |
| 460 | module_init(mtd_pagetest_init); |
| 461 | |
| 462 | static void __exit mtd_pagetest_exit(void) |
| 463 | { |
| 464 | return; |
| 465 | } |
| 466 | module_exit(mtd_pagetest_exit); |
| 467 | |
| 468 | MODULE_DESCRIPTION("NAND page test"); |
| 469 | MODULE_AUTHOR("Adrian Hunter"); |
| 470 | MODULE_LICENSE("GPL"); |