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e3644da7 AB |
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 OOB read and write on MTD device. | |
18 | * | |
19 | * Author: Adrian Hunter <ext-adrian.hunter@nokia.com> | |
20 | */ | |
21 | ||
22 | #include <asm/div64.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/moduleparam.h> | |
26 | #include <linux/err.h> | |
27 | #include <linux/mtd/mtd.h> | |
5a0e3ad6 | 28 | #include <linux/slab.h> |
e3644da7 AB |
29 | #include <linux/sched.h> |
30 | ||
31 | #define PRINT_PREF KERN_INFO "mtd_oobtest: " | |
32 | ||
33 | static int dev; | |
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 *readbuf; | |
39 | static unsigned char *writebuf; | |
40 | static unsigned char *bbt; | |
41 | ||
42 | static int ebcnt; | |
43 | static int pgcnt; | |
44 | static int errcnt; | |
45 | static int use_offset; | |
46 | static int use_len; | |
47 | static int use_len_max; | |
48 | static int vary_offset; | |
49 | static unsigned long next = 1; | |
50 | ||
51 | static inline unsigned int simple_rand(void) | |
52 | { | |
53 | next = next * 1103515245 + 12345; | |
54 | return (unsigned int)((next / 65536) % 32768); | |
55 | } | |
56 | ||
57 | static inline void simple_srand(unsigned long seed) | |
58 | { | |
59 | next = seed; | |
60 | } | |
61 | ||
62 | static void set_random_data(unsigned char *buf, size_t len) | |
63 | { | |
64 | size_t i; | |
65 | ||
66 | for (i = 0; i < len; ++i) | |
67 | buf[i] = simple_rand(); | |
68 | } | |
69 | ||
70 | static int erase_eraseblock(int ebnum) | |
71 | { | |
72 | int err; | |
73 | struct erase_info ei; | |
74 | loff_t addr = ebnum * mtd->erasesize; | |
75 | ||
76 | memset(&ei, 0, sizeof(struct erase_info)); | |
77 | ei.mtd = mtd; | |
78 | ei.addr = addr; | |
79 | ei.len = mtd->erasesize; | |
80 | ||
81 | err = mtd->erase(mtd, &ei); | |
82 | if (err) { | |
83 | printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum); | |
84 | return err; | |
85 | } | |
86 | ||
87 | if (ei.state == MTD_ERASE_FAILED) { | |
88 | printk(PRINT_PREF "some erase error occurred at EB %d\n", | |
89 | ebnum); | |
90 | return -EIO; | |
91 | } | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | static int erase_whole_device(void) | |
97 | { | |
98 | int err; | |
99 | unsigned int i; | |
100 | ||
101 | printk(PRINT_PREF "erasing whole device\n"); | |
102 | for (i = 0; i < ebcnt; ++i) { | |
103 | if (bbt[i]) | |
104 | continue; | |
105 | err = erase_eraseblock(i); | |
106 | if (err) | |
107 | return err; | |
108 | cond_resched(); | |
109 | } | |
110 | printk(PRINT_PREF "erased %u eraseblocks\n", i); | |
111 | return 0; | |
112 | } | |
113 | ||
114 | static void do_vary_offset(void) | |
115 | { | |
116 | use_len -= 1; | |
117 | if (use_len < 1) { | |
118 | use_offset += 1; | |
119 | if (use_offset >= use_len_max) | |
120 | use_offset = 0; | |
121 | use_len = use_len_max - use_offset; | |
122 | } | |
123 | } | |
124 | ||
125 | static int write_eraseblock(int ebnum) | |
126 | { | |
127 | int i; | |
128 | struct mtd_oob_ops ops; | |
129 | int err = 0; | |
130 | loff_t addr = ebnum * mtd->erasesize; | |
131 | ||
132 | for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) { | |
133 | set_random_data(writebuf, use_len); | |
134 | ops.mode = MTD_OOB_AUTO; | |
135 | ops.len = 0; | |
136 | ops.retlen = 0; | |
137 | ops.ooblen = use_len; | |
138 | ops.oobretlen = 0; | |
139 | ops.ooboffs = use_offset; | |
23d42494 | 140 | ops.datbuf = NULL; |
e3644da7 AB |
141 | ops.oobbuf = writebuf; |
142 | err = mtd->write_oob(mtd, addr, &ops); | |
143 | if (err || ops.oobretlen != use_len) { | |
144 | printk(PRINT_PREF "error: writeoob failed at %#llx\n", | |
145 | (long long)addr); | |
146 | printk(PRINT_PREF "error: use_len %d, use_offset %d\n", | |
147 | use_len, use_offset); | |
148 | errcnt += 1; | |
149 | return err ? err : -1; | |
150 | } | |
151 | if (vary_offset) | |
152 | do_vary_offset(); | |
153 | } | |
154 | ||
155 | return err; | |
156 | } | |
157 | ||
158 | static int write_whole_device(void) | |
159 | { | |
160 | int err; | |
161 | unsigned int i; | |
162 | ||
163 | printk(PRINT_PREF "writing OOBs of whole device\n"); | |
164 | for (i = 0; i < ebcnt; ++i) { | |
165 | if (bbt[i]) | |
166 | continue; | |
167 | err = write_eraseblock(i); | |
168 | if (err) | |
169 | return err; | |
170 | if (i % 256 == 0) | |
171 | printk(PRINT_PREF "written up to eraseblock %u\n", i); | |
172 | cond_resched(); | |
173 | } | |
174 | printk(PRINT_PREF "written %u eraseblocks\n", i); | |
175 | return 0; | |
176 | } | |
177 | ||
178 | static int verify_eraseblock(int ebnum) | |
179 | { | |
180 | int i; | |
181 | struct mtd_oob_ops ops; | |
182 | int err = 0; | |
183 | loff_t addr = ebnum * mtd->erasesize; | |
184 | ||
185 | for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) { | |
186 | set_random_data(writebuf, use_len); | |
187 | ops.mode = MTD_OOB_AUTO; | |
188 | ops.len = 0; | |
189 | ops.retlen = 0; | |
190 | ops.ooblen = use_len; | |
191 | ops.oobretlen = 0; | |
192 | ops.ooboffs = use_offset; | |
23d42494 | 193 | ops.datbuf = NULL; |
e3644da7 AB |
194 | ops.oobbuf = readbuf; |
195 | err = mtd->read_oob(mtd, addr, &ops); | |
196 | if (err || ops.oobretlen != use_len) { | |
197 | printk(PRINT_PREF "error: readoob failed at %#llx\n", | |
198 | (long long)addr); | |
199 | errcnt += 1; | |
200 | return err ? err : -1; | |
201 | } | |
202 | if (memcmp(readbuf, writebuf, use_len)) { | |
203 | printk(PRINT_PREF "error: verify failed at %#llx\n", | |
204 | (long long)addr); | |
205 | errcnt += 1; | |
206 | if (errcnt > 1000) { | |
207 | printk(PRINT_PREF "error: too many errors\n"); | |
208 | return -1; | |
209 | } | |
210 | } | |
211 | if (use_offset != 0 || use_len < mtd->ecclayout->oobavail) { | |
212 | int k; | |
213 | ||
214 | ops.mode = MTD_OOB_AUTO; | |
215 | ops.len = 0; | |
216 | ops.retlen = 0; | |
217 | ops.ooblen = mtd->ecclayout->oobavail; | |
218 | ops.oobretlen = 0; | |
219 | ops.ooboffs = 0; | |
23d42494 | 220 | ops.datbuf = NULL; |
e3644da7 AB |
221 | ops.oobbuf = readbuf; |
222 | err = mtd->read_oob(mtd, addr, &ops); | |
223 | if (err || ops.oobretlen != mtd->ecclayout->oobavail) { | |
224 | printk(PRINT_PREF "error: readoob failed at " | |
225 | "%#llx\n", (long long)addr); | |
226 | errcnt += 1; | |
227 | return err ? err : -1; | |
228 | } | |
229 | if (memcmp(readbuf + use_offset, writebuf, use_len)) { | |
230 | printk(PRINT_PREF "error: verify failed at " | |
231 | "%#llx\n", (long long)addr); | |
232 | errcnt += 1; | |
233 | if (errcnt > 1000) { | |
234 | printk(PRINT_PREF "error: too many " | |
235 | "errors\n"); | |
236 | return -1; | |
237 | } | |
238 | } | |
239 | for (k = 0; k < use_offset; ++k) | |
240 | if (readbuf[k] != 0xff) { | |
241 | printk(PRINT_PREF "error: verify 0xff " | |
242 | "failed at %#llx\n", | |
243 | (long long)addr); | |
244 | errcnt += 1; | |
245 | if (errcnt > 1000) { | |
246 | printk(PRINT_PREF "error: too " | |
247 | "many errors\n"); | |
248 | return -1; | |
249 | } | |
250 | } | |
251 | for (k = use_offset + use_len; | |
252 | k < mtd->ecclayout->oobavail; ++k) | |
253 | if (readbuf[k] != 0xff) { | |
254 | printk(PRINT_PREF "error: verify 0xff " | |
255 | "failed at %#llx\n", | |
256 | (long long)addr); | |
257 | errcnt += 1; | |
258 | if (errcnt > 1000) { | |
259 | printk(PRINT_PREF "error: too " | |
260 | "many errors\n"); | |
261 | return -1; | |
262 | } | |
263 | } | |
264 | } | |
265 | if (vary_offset) | |
266 | do_vary_offset(); | |
267 | } | |
268 | return err; | |
269 | } | |
270 | ||
271 | static int verify_eraseblock_in_one_go(int ebnum) | |
272 | { | |
273 | struct mtd_oob_ops ops; | |
274 | int err = 0; | |
275 | loff_t addr = ebnum * mtd->erasesize; | |
276 | size_t len = mtd->ecclayout->oobavail * pgcnt; | |
277 | ||
278 | set_random_data(writebuf, len); | |
279 | ops.mode = MTD_OOB_AUTO; | |
280 | ops.len = 0; | |
281 | ops.retlen = 0; | |
282 | ops.ooblen = len; | |
283 | ops.oobretlen = 0; | |
284 | ops.ooboffs = 0; | |
23d42494 | 285 | ops.datbuf = NULL; |
e3644da7 AB |
286 | ops.oobbuf = readbuf; |
287 | err = mtd->read_oob(mtd, addr, &ops); | |
288 | if (err || ops.oobretlen != len) { | |
289 | printk(PRINT_PREF "error: readoob failed at %#llx\n", | |
290 | (long long)addr); | |
291 | errcnt += 1; | |
292 | return err ? err : -1; | |
293 | } | |
294 | if (memcmp(readbuf, writebuf, len)) { | |
295 | printk(PRINT_PREF "error: verify failed at %#llx\n", | |
296 | (long long)addr); | |
297 | errcnt += 1; | |
298 | if (errcnt > 1000) { | |
299 | printk(PRINT_PREF "error: too many errors\n"); | |
300 | return -1; | |
301 | } | |
302 | } | |
303 | ||
304 | return err; | |
305 | } | |
306 | ||
307 | static int verify_all_eraseblocks(void) | |
308 | { | |
309 | int err; | |
310 | unsigned int i; | |
311 | ||
312 | printk(PRINT_PREF "verifying all eraseblocks\n"); | |
313 | for (i = 0; i < ebcnt; ++i) { | |
314 | if (bbt[i]) | |
315 | continue; | |
316 | err = verify_eraseblock(i); | |
317 | if (err) | |
318 | return err; | |
319 | if (i % 256 == 0) | |
320 | printk(PRINT_PREF "verified up to eraseblock %u\n", i); | |
321 | cond_resched(); | |
322 | } | |
323 | printk(PRINT_PREF "verified %u eraseblocks\n", i); | |
324 | return 0; | |
325 | } | |
326 | ||
327 | static int is_block_bad(int ebnum) | |
328 | { | |
329 | int ret; | |
330 | loff_t addr = ebnum * mtd->erasesize; | |
331 | ||
332 | ret = mtd->block_isbad(mtd, addr); | |
333 | if (ret) | |
334 | printk(PRINT_PREF "block %d is bad\n", ebnum); | |
335 | return ret; | |
336 | } | |
337 | ||
338 | static int scan_for_bad_eraseblocks(void) | |
339 | { | |
340 | int i, bad = 0; | |
341 | ||
342 | bbt = kmalloc(ebcnt, GFP_KERNEL); | |
343 | if (!bbt) { | |
344 | printk(PRINT_PREF "error: cannot allocate memory\n"); | |
345 | return -ENOMEM; | |
346 | } | |
e3644da7 AB |
347 | |
348 | printk(PRINT_PREF "scanning for bad eraseblocks\n"); | |
349 | for (i = 0; i < ebcnt; ++i) { | |
350 | bbt[i] = is_block_bad(i) ? 1 : 0; | |
351 | if (bbt[i]) | |
352 | bad += 1; | |
353 | cond_resched(); | |
354 | } | |
355 | printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad); | |
356 | return 0; | |
357 | } | |
358 | ||
359 | static int __init mtd_oobtest_init(void) | |
360 | { | |
361 | int err = 0; | |
362 | unsigned int i; | |
363 | uint64_t tmp; | |
364 | struct mtd_oob_ops ops; | |
365 | loff_t addr = 0, addr0; | |
366 | ||
367 | printk(KERN_INFO "\n"); | |
368 | printk(KERN_INFO "=================================================\n"); | |
369 | printk(PRINT_PREF "MTD device: %d\n", dev); | |
370 | ||
371 | mtd = get_mtd_device(NULL, dev); | |
372 | if (IS_ERR(mtd)) { | |
373 | err = PTR_ERR(mtd); | |
374 | printk(PRINT_PREF "error: cannot get MTD device\n"); | |
375 | return err; | |
376 | } | |
377 | ||
378 | if (mtd->type != MTD_NANDFLASH) { | |
379 | printk(PRINT_PREF "this test requires NAND flash\n"); | |
380 | goto out; | |
381 | } | |
382 | ||
383 | tmp = mtd->size; | |
384 | do_div(tmp, mtd->erasesize); | |
385 | ebcnt = tmp; | |
386 | pgcnt = mtd->erasesize / mtd->writesize; | |
387 | ||
388 | printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, " | |
389 | "page size %u, count of eraseblocks %u, pages per " | |
390 | "eraseblock %u, OOB size %u\n", | |
391 | (unsigned long long)mtd->size, mtd->erasesize, | |
392 | mtd->writesize, ebcnt, pgcnt, mtd->oobsize); | |
393 | ||
394 | err = -ENOMEM; | |
e3644da7 AB |
395 | readbuf = kmalloc(mtd->erasesize, GFP_KERNEL); |
396 | if (!readbuf) { | |
397 | printk(PRINT_PREF "error: cannot allocate memory\n"); | |
398 | goto out; | |
399 | } | |
400 | writebuf = kmalloc(mtd->erasesize, GFP_KERNEL); | |
401 | if (!writebuf) { | |
402 | printk(PRINT_PREF "error: cannot allocate memory\n"); | |
403 | goto out; | |
404 | } | |
405 | ||
406 | err = scan_for_bad_eraseblocks(); | |
407 | if (err) | |
408 | goto out; | |
409 | ||
410 | use_offset = 0; | |
411 | use_len = mtd->ecclayout->oobavail; | |
412 | use_len_max = mtd->ecclayout->oobavail; | |
413 | vary_offset = 0; | |
414 | ||
415 | /* First test: write all OOB, read it back and verify */ | |
416 | printk(PRINT_PREF "test 1 of 5\n"); | |
417 | ||
418 | err = erase_whole_device(); | |
419 | if (err) | |
420 | goto out; | |
421 | ||
422 | simple_srand(1); | |
423 | err = write_whole_device(); | |
424 | if (err) | |
425 | goto out; | |
426 | ||
427 | simple_srand(1); | |
428 | err = verify_all_eraseblocks(); | |
429 | if (err) | |
430 | goto out; | |
431 | ||
432 | /* | |
433 | * Second test: write all OOB, a block at a time, read it back and | |
434 | * verify. | |
435 | */ | |
436 | printk(PRINT_PREF "test 2 of 5\n"); | |
437 | ||
438 | err = erase_whole_device(); | |
439 | if (err) | |
440 | goto out; | |
441 | ||
442 | simple_srand(3); | |
443 | err = write_whole_device(); | |
444 | if (err) | |
445 | goto out; | |
446 | ||
447 | /* Check all eraseblocks */ | |
448 | simple_srand(3); | |
449 | printk(PRINT_PREF "verifying all eraseblocks\n"); | |
450 | for (i = 0; i < ebcnt; ++i) { | |
451 | if (bbt[i]) | |
452 | continue; | |
453 | err = verify_eraseblock_in_one_go(i); | |
454 | if (err) | |
455 | goto out; | |
456 | if (i % 256 == 0) | |
457 | printk(PRINT_PREF "verified up to eraseblock %u\n", i); | |
458 | cond_resched(); | |
459 | } | |
460 | printk(PRINT_PREF "verified %u eraseblocks\n", i); | |
461 | ||
462 | /* | |
463 | * Third test: write OOB at varying offsets and lengths, read it back | |
464 | * and verify. | |
465 | */ | |
466 | printk(PRINT_PREF "test 3 of 5\n"); | |
467 | ||
468 | err = erase_whole_device(); | |
469 | if (err) | |
470 | goto out; | |
471 | ||
472 | /* Write all eraseblocks */ | |
473 | use_offset = 0; | |
474 | use_len = mtd->ecclayout->oobavail; | |
475 | use_len_max = mtd->ecclayout->oobavail; | |
476 | vary_offset = 1; | |
477 | simple_srand(5); | |
f54d6336 AM |
478 | |
479 | err = write_whole_device(); | |
480 | if (err) | |
481 | goto out; | |
e3644da7 AB |
482 | |
483 | /* Check all eraseblocks */ | |
484 | use_offset = 0; | |
485 | use_len = mtd->ecclayout->oobavail; | |
486 | use_len_max = mtd->ecclayout->oobavail; | |
487 | vary_offset = 1; | |
488 | simple_srand(5); | |
489 | err = verify_all_eraseblocks(); | |
490 | if (err) | |
491 | goto out; | |
492 | ||
493 | use_offset = 0; | |
494 | use_len = mtd->ecclayout->oobavail; | |
495 | use_len_max = mtd->ecclayout->oobavail; | |
496 | vary_offset = 0; | |
497 | ||
498 | /* Fourth test: try to write off end of device */ | |
499 | printk(PRINT_PREF "test 4 of 5\n"); | |
500 | ||
501 | err = erase_whole_device(); | |
502 | if (err) | |
503 | goto out; | |
504 | ||
505 | addr0 = 0; | |
c6f7e7be | 506 | for (i = 0; i < ebcnt && bbt[i]; ++i) |
e3644da7 AB |
507 | addr0 += mtd->erasesize; |
508 | ||
509 | /* Attempt to write off end of OOB */ | |
510 | ops.mode = MTD_OOB_AUTO; | |
511 | ops.len = 0; | |
512 | ops.retlen = 0; | |
513 | ops.ooblen = 1; | |
514 | ops.oobretlen = 0; | |
515 | ops.ooboffs = mtd->ecclayout->oobavail; | |
23d42494 | 516 | ops.datbuf = NULL; |
e3644da7 AB |
517 | ops.oobbuf = writebuf; |
518 | printk(PRINT_PREF "attempting to start write past end of OOB\n"); | |
519 | printk(PRINT_PREF "an error is expected...\n"); | |
520 | err = mtd->write_oob(mtd, addr0, &ops); | |
521 | if (err) { | |
522 | printk(PRINT_PREF "error occurred as expected\n"); | |
523 | err = 0; | |
524 | } else { | |
525 | printk(PRINT_PREF "error: can write past end of OOB\n"); | |
526 | errcnt += 1; | |
527 | } | |
528 | ||
529 | /* Attempt to read off end of OOB */ | |
530 | ops.mode = MTD_OOB_AUTO; | |
531 | ops.len = 0; | |
532 | ops.retlen = 0; | |
533 | ops.ooblen = 1; | |
534 | ops.oobretlen = 0; | |
535 | ops.ooboffs = mtd->ecclayout->oobavail; | |
23d42494 | 536 | ops.datbuf = NULL; |
e3644da7 AB |
537 | ops.oobbuf = readbuf; |
538 | printk(PRINT_PREF "attempting to start read past end of OOB\n"); | |
539 | printk(PRINT_PREF "an error is expected...\n"); | |
540 | err = mtd->read_oob(mtd, addr0, &ops); | |
541 | if (err) { | |
542 | printk(PRINT_PREF "error occurred as expected\n"); | |
543 | err = 0; | |
544 | } else { | |
545 | printk(PRINT_PREF "error: can read past end of OOB\n"); | |
546 | errcnt += 1; | |
547 | } | |
548 | ||
549 | if (bbt[ebcnt - 1]) | |
550 | printk(PRINT_PREF "skipping end of device tests because last " | |
551 | "block is bad\n"); | |
552 | else { | |
553 | /* Attempt to write off end of device */ | |
554 | ops.mode = MTD_OOB_AUTO; | |
555 | ops.len = 0; | |
556 | ops.retlen = 0; | |
557 | ops.ooblen = mtd->ecclayout->oobavail + 1; | |
558 | ops.oobretlen = 0; | |
559 | ops.ooboffs = 0; | |
23d42494 | 560 | ops.datbuf = NULL; |
e3644da7 AB |
561 | ops.oobbuf = writebuf; |
562 | printk(PRINT_PREF "attempting to write past end of device\n"); | |
563 | printk(PRINT_PREF "an error is expected...\n"); | |
564 | err = mtd->write_oob(mtd, mtd->size - mtd->writesize, &ops); | |
565 | if (err) { | |
566 | printk(PRINT_PREF "error occurred as expected\n"); | |
567 | err = 0; | |
568 | } else { | |
569 | printk(PRINT_PREF "error: wrote past end of device\n"); | |
570 | errcnt += 1; | |
571 | } | |
572 | ||
573 | /* Attempt to read off end of device */ | |
574 | ops.mode = MTD_OOB_AUTO; | |
575 | ops.len = 0; | |
576 | ops.retlen = 0; | |
577 | ops.ooblen = mtd->ecclayout->oobavail + 1; | |
578 | ops.oobretlen = 0; | |
579 | ops.ooboffs = 0; | |
23d42494 | 580 | ops.datbuf = NULL; |
e3644da7 AB |
581 | ops.oobbuf = readbuf; |
582 | printk(PRINT_PREF "attempting to read past end of device\n"); | |
583 | printk(PRINT_PREF "an error is expected...\n"); | |
584 | err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops); | |
585 | if (err) { | |
586 | printk(PRINT_PREF "error occurred as expected\n"); | |
587 | err = 0; | |
588 | } else { | |
589 | printk(PRINT_PREF "error: read past end of device\n"); | |
590 | errcnt += 1; | |
591 | } | |
592 | ||
593 | err = erase_eraseblock(ebcnt - 1); | |
594 | if (err) | |
595 | goto out; | |
596 | ||
597 | /* Attempt to write off end of device */ | |
598 | ops.mode = MTD_OOB_AUTO; | |
599 | ops.len = 0; | |
600 | ops.retlen = 0; | |
601 | ops.ooblen = mtd->ecclayout->oobavail; | |
602 | ops.oobretlen = 0; | |
603 | ops.ooboffs = 1; | |
23d42494 | 604 | ops.datbuf = NULL; |
e3644da7 AB |
605 | ops.oobbuf = writebuf; |
606 | printk(PRINT_PREF "attempting to write past end of device\n"); | |
607 | printk(PRINT_PREF "an error is expected...\n"); | |
608 | err = mtd->write_oob(mtd, mtd->size - mtd->writesize, &ops); | |
609 | if (err) { | |
610 | printk(PRINT_PREF "error occurred as expected\n"); | |
611 | err = 0; | |
612 | } else { | |
613 | printk(PRINT_PREF "error: wrote past end of device\n"); | |
614 | errcnt += 1; | |
615 | } | |
616 | ||
617 | /* Attempt to read off end of device */ | |
618 | ops.mode = MTD_OOB_AUTO; | |
619 | ops.len = 0; | |
620 | ops.retlen = 0; | |
621 | ops.ooblen = mtd->ecclayout->oobavail; | |
622 | ops.oobretlen = 0; | |
623 | ops.ooboffs = 1; | |
23d42494 | 624 | ops.datbuf = NULL; |
e3644da7 AB |
625 | ops.oobbuf = readbuf; |
626 | printk(PRINT_PREF "attempting to read past end of device\n"); | |
627 | printk(PRINT_PREF "an error is expected...\n"); | |
628 | err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops); | |
629 | if (err) { | |
630 | printk(PRINT_PREF "error occurred as expected\n"); | |
631 | err = 0; | |
632 | } else { | |
633 | printk(PRINT_PREF "error: read past end of device\n"); | |
634 | errcnt += 1; | |
635 | } | |
636 | } | |
637 | ||
638 | /* Fifth test: write / read across block boundaries */ | |
639 | printk(PRINT_PREF "test 5 of 5\n"); | |
640 | ||
641 | /* Erase all eraseblocks */ | |
642 | err = erase_whole_device(); | |
643 | if (err) | |
644 | goto out; | |
645 | ||
646 | /* Write all eraseblocks */ | |
647 | simple_srand(11); | |
648 | printk(PRINT_PREF "writing OOBs of whole device\n"); | |
649 | for (i = 0; i < ebcnt - 1; ++i) { | |
650 | int cnt = 2; | |
651 | int pg; | |
652 | size_t sz = mtd->ecclayout->oobavail; | |
653 | if (bbt[i] || bbt[i + 1]) | |
654 | continue; | |
655 | addr = (i + 1) * mtd->erasesize - mtd->writesize; | |
656 | for (pg = 0; pg < cnt; ++pg) { | |
657 | set_random_data(writebuf, sz); | |
658 | ops.mode = MTD_OOB_AUTO; | |
659 | ops.len = 0; | |
660 | ops.retlen = 0; | |
661 | ops.ooblen = sz; | |
662 | ops.oobretlen = 0; | |
663 | ops.ooboffs = 0; | |
23d42494 | 664 | ops.datbuf = NULL; |
e3644da7 AB |
665 | ops.oobbuf = writebuf; |
666 | err = mtd->write_oob(mtd, addr, &ops); | |
667 | if (err) | |
668 | goto out; | |
669 | if (i % 256 == 0) | |
670 | printk(PRINT_PREF "written up to eraseblock " | |
671 | "%u\n", i); | |
672 | cond_resched(); | |
673 | addr += mtd->writesize; | |
674 | } | |
675 | } | |
676 | printk(PRINT_PREF "written %u eraseblocks\n", i); | |
677 | ||
678 | /* Check all eraseblocks */ | |
679 | simple_srand(11); | |
680 | printk(PRINT_PREF "verifying all eraseblocks\n"); | |
681 | for (i = 0; i < ebcnt - 1; ++i) { | |
682 | if (bbt[i] || bbt[i + 1]) | |
683 | continue; | |
684 | set_random_data(writebuf, mtd->ecclayout->oobavail * 2); | |
685 | addr = (i + 1) * mtd->erasesize - mtd->writesize; | |
686 | ops.mode = MTD_OOB_AUTO; | |
687 | ops.len = 0; | |
688 | ops.retlen = 0; | |
689 | ops.ooblen = mtd->ecclayout->oobavail * 2; | |
690 | ops.oobretlen = 0; | |
691 | ops.ooboffs = 0; | |
23d42494 | 692 | ops.datbuf = NULL; |
e3644da7 AB |
693 | ops.oobbuf = readbuf; |
694 | err = mtd->read_oob(mtd, addr, &ops); | |
695 | if (err) | |
696 | goto out; | |
697 | if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) { | |
698 | printk(PRINT_PREF "error: verify failed at %#llx\n", | |
699 | (long long)addr); | |
700 | errcnt += 1; | |
701 | if (errcnt > 1000) { | |
702 | printk(PRINT_PREF "error: too many errors\n"); | |
703 | goto out; | |
704 | } | |
705 | } | |
706 | if (i % 256 == 0) | |
707 | printk(PRINT_PREF "verified up to eraseblock %u\n", i); | |
708 | cond_resched(); | |
709 | } | |
710 | printk(PRINT_PREF "verified %u eraseblocks\n", i); | |
711 | ||
712 | printk(PRINT_PREF "finished with %d errors\n", errcnt); | |
713 | out: | |
714 | kfree(bbt); | |
715 | kfree(writebuf); | |
716 | kfree(readbuf); | |
717 | put_mtd_device(mtd); | |
718 | if (err) | |
719 | printk(PRINT_PREF "error %d occurred\n", err); | |
720 | printk(KERN_INFO "=================================================\n"); | |
721 | return err; | |
722 | } | |
723 | module_init(mtd_oobtest_init); | |
724 | ||
725 | static void __exit mtd_oobtest_exit(void) | |
726 | { | |
727 | return; | |
728 | } | |
729 | module_exit(mtd_oobtest_exit); | |
730 | ||
731 | MODULE_DESCRIPTION("Out-of-band test module"); | |
732 | MODULE_AUTHOR("Adrian Hunter"); | |
733 | MODULE_LICENSE("GPL"); |