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Merge branch 'x86-smep-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6/next.git] / drivers / mtd / tests / mtd_oobtest.c
blobdec92ae6111a190b0ad8493ad5098c996a7a0616
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>
28 #include <linux/slab.h>
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;
140 ops.datbuf = NULL;
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;
193 ops.datbuf = NULL;
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;
220 ops.datbuf = NULL;
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;
285 ops.datbuf = NULL;
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 }
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;
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);
478
479 err = write_whole_device();
480 if (err)
481 goto out;
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;
506 for (i = 0; i < ebcnt && bbt[i]; ++i)
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;
516 ops.datbuf = NULL;
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;
536 ops.datbuf = NULL;
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;
560 ops.datbuf = NULL;
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;
580 ops.datbuf = NULL;
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;
604 ops.datbuf = NULL;
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;
624 ops.datbuf = NULL;
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;
664 ops.datbuf = NULL;
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;
692 ops.datbuf = NULL;
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");
linux-next