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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 | ||
7406060e | 33 | static int dev = -EINVAL; |
e3644da7 AB |
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 | ||
7e1f0dc0 | 81 | err = mtd_erase(mtd, &ei); |
e3644da7 AB |
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); | |
0612b9dd | 134 | ops.mode = MTD_OPS_AUTO_OOB; |
e3644da7 AB |
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 | 141 | ops.oobbuf = writebuf; |
a2cc5ba0 | 142 | err = mtd_write_oob(mtd, addr, &ops); |
e3644da7 AB |
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); | |
0612b9dd | 187 | ops.mode = MTD_OPS_AUTO_OOB; |
e3644da7 AB |
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 | 194 | ops.oobbuf = readbuf; |
fd2819bb | 195 | err = mtd_read_oob(mtd, addr, &ops); |
e3644da7 AB |
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 | ||
0612b9dd | 214 | ops.mode = MTD_OPS_AUTO_OOB; |
e3644da7 AB |
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 | 221 | ops.oobbuf = readbuf; |
fd2819bb | 222 | err = mtd_read_oob(mtd, addr, &ops); |
e3644da7 AB |
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); | |
0612b9dd | 279 | ops.mode = MTD_OPS_AUTO_OOB; |
e3644da7 AB |
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 | 286 | ops.oobbuf = readbuf; |
fd2819bb | 287 | err = mtd_read_oob(mtd, addr, &ops); |
e3644da7 AB |
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 | ||
7086c19d | 332 | ret = mtd_block_isbad(mtd, addr); |
e3644da7 AB |
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"); | |
7406060e WS |
369 | |
370 | if (dev < 0) { | |
371 | printk(PRINT_PREF "Please specify a valid mtd-device via module paramter\n"); | |
372 | printk(KERN_CRIT "CAREFUL: This test wipes all data on the specified MTD device!\n"); | |
373 | return -EINVAL; | |
374 | } | |
375 | ||
e3644da7 AB |
376 | printk(PRINT_PREF "MTD device: %d\n", dev); |
377 | ||
378 | mtd = get_mtd_device(NULL, dev); | |
379 | if (IS_ERR(mtd)) { | |
380 | err = PTR_ERR(mtd); | |
381 | printk(PRINT_PREF "error: cannot get MTD device\n"); | |
382 | return err; | |
383 | } | |
384 | ||
385 | if (mtd->type != MTD_NANDFLASH) { | |
386 | printk(PRINT_PREF "this test requires NAND flash\n"); | |
387 | goto out; | |
388 | } | |
389 | ||
390 | tmp = mtd->size; | |
391 | do_div(tmp, mtd->erasesize); | |
392 | ebcnt = tmp; | |
393 | pgcnt = mtd->erasesize / mtd->writesize; | |
394 | ||
395 | printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, " | |
396 | "page size %u, count of eraseblocks %u, pages per " | |
397 | "eraseblock %u, OOB size %u\n", | |
398 | (unsigned long long)mtd->size, mtd->erasesize, | |
399 | mtd->writesize, ebcnt, pgcnt, mtd->oobsize); | |
400 | ||
401 | err = -ENOMEM; | |
e3644da7 AB |
402 | readbuf = kmalloc(mtd->erasesize, GFP_KERNEL); |
403 | if (!readbuf) { | |
404 | printk(PRINT_PREF "error: cannot allocate memory\n"); | |
405 | goto out; | |
406 | } | |
407 | writebuf = kmalloc(mtd->erasesize, GFP_KERNEL); | |
408 | if (!writebuf) { | |
409 | printk(PRINT_PREF "error: cannot allocate memory\n"); | |
410 | goto out; | |
411 | } | |
412 | ||
413 | err = scan_for_bad_eraseblocks(); | |
414 | if (err) | |
415 | goto out; | |
416 | ||
417 | use_offset = 0; | |
418 | use_len = mtd->ecclayout->oobavail; | |
419 | use_len_max = mtd->ecclayout->oobavail; | |
420 | vary_offset = 0; | |
421 | ||
422 | /* First test: write all OOB, read it back and verify */ | |
423 | printk(PRINT_PREF "test 1 of 5\n"); | |
424 | ||
425 | err = erase_whole_device(); | |
426 | if (err) | |
427 | goto out; | |
428 | ||
429 | simple_srand(1); | |
430 | err = write_whole_device(); | |
431 | if (err) | |
432 | goto out; | |
433 | ||
434 | simple_srand(1); | |
435 | err = verify_all_eraseblocks(); | |
436 | if (err) | |
437 | goto out; | |
438 | ||
439 | /* | |
440 | * Second test: write all OOB, a block at a time, read it back and | |
441 | * verify. | |
442 | */ | |
443 | printk(PRINT_PREF "test 2 of 5\n"); | |
444 | ||
445 | err = erase_whole_device(); | |
446 | if (err) | |
447 | goto out; | |
448 | ||
449 | simple_srand(3); | |
450 | err = write_whole_device(); | |
451 | if (err) | |
452 | goto out; | |
453 | ||
454 | /* Check all eraseblocks */ | |
455 | simple_srand(3); | |
456 | printk(PRINT_PREF "verifying all eraseblocks\n"); | |
457 | for (i = 0; i < ebcnt; ++i) { | |
458 | if (bbt[i]) | |
459 | continue; | |
460 | err = verify_eraseblock_in_one_go(i); | |
461 | if (err) | |
462 | goto out; | |
463 | if (i % 256 == 0) | |
464 | printk(PRINT_PREF "verified up to eraseblock %u\n", i); | |
465 | cond_resched(); | |
466 | } | |
467 | printk(PRINT_PREF "verified %u eraseblocks\n", i); | |
468 | ||
469 | /* | |
470 | * Third test: write OOB at varying offsets and lengths, read it back | |
471 | * and verify. | |
472 | */ | |
473 | printk(PRINT_PREF "test 3 of 5\n"); | |
474 | ||
475 | err = erase_whole_device(); | |
476 | if (err) | |
477 | goto out; | |
478 | ||
479 | /* Write all eraseblocks */ | |
480 | use_offset = 0; | |
481 | use_len = mtd->ecclayout->oobavail; | |
482 | use_len_max = mtd->ecclayout->oobavail; | |
483 | vary_offset = 1; | |
484 | simple_srand(5); | |
f54d6336 AM |
485 | |
486 | err = write_whole_device(); | |
487 | if (err) | |
488 | goto out; | |
e3644da7 AB |
489 | |
490 | /* Check all eraseblocks */ | |
491 | use_offset = 0; | |
492 | use_len = mtd->ecclayout->oobavail; | |
493 | use_len_max = mtd->ecclayout->oobavail; | |
494 | vary_offset = 1; | |
495 | simple_srand(5); | |
496 | err = verify_all_eraseblocks(); | |
497 | if (err) | |
498 | goto out; | |
499 | ||
500 | use_offset = 0; | |
501 | use_len = mtd->ecclayout->oobavail; | |
502 | use_len_max = mtd->ecclayout->oobavail; | |
503 | vary_offset = 0; | |
504 | ||
505 | /* Fourth test: try to write off end of device */ | |
506 | printk(PRINT_PREF "test 4 of 5\n"); | |
507 | ||
508 | err = erase_whole_device(); | |
509 | if (err) | |
510 | goto out; | |
511 | ||
512 | addr0 = 0; | |
c6f7e7be | 513 | for (i = 0; i < ebcnt && bbt[i]; ++i) |
e3644da7 AB |
514 | addr0 += mtd->erasesize; |
515 | ||
516 | /* Attempt to write off end of OOB */ | |
0612b9dd | 517 | ops.mode = MTD_OPS_AUTO_OOB; |
e3644da7 AB |
518 | ops.len = 0; |
519 | ops.retlen = 0; | |
520 | ops.ooblen = 1; | |
521 | ops.oobretlen = 0; | |
522 | ops.ooboffs = mtd->ecclayout->oobavail; | |
23d42494 | 523 | ops.datbuf = NULL; |
e3644da7 AB |
524 | ops.oobbuf = writebuf; |
525 | printk(PRINT_PREF "attempting to start write past end of OOB\n"); | |
526 | printk(PRINT_PREF "an error is expected...\n"); | |
a2cc5ba0 | 527 | err = mtd_write_oob(mtd, addr0, &ops); |
e3644da7 AB |
528 | if (err) { |
529 | printk(PRINT_PREF "error occurred as expected\n"); | |
530 | err = 0; | |
531 | } else { | |
532 | printk(PRINT_PREF "error: can write past end of OOB\n"); | |
533 | errcnt += 1; | |
534 | } | |
535 | ||
536 | /* Attempt to read off end of OOB */ | |
0612b9dd | 537 | ops.mode = MTD_OPS_AUTO_OOB; |
e3644da7 AB |
538 | ops.len = 0; |
539 | ops.retlen = 0; | |
540 | ops.ooblen = 1; | |
541 | ops.oobretlen = 0; | |
542 | ops.ooboffs = mtd->ecclayout->oobavail; | |
23d42494 | 543 | ops.datbuf = NULL; |
e3644da7 AB |
544 | ops.oobbuf = readbuf; |
545 | printk(PRINT_PREF "attempting to start read past end of OOB\n"); | |
546 | printk(PRINT_PREF "an error is expected...\n"); | |
fd2819bb | 547 | err = mtd_read_oob(mtd, addr0, &ops); |
e3644da7 AB |
548 | if (err) { |
549 | printk(PRINT_PREF "error occurred as expected\n"); | |
550 | err = 0; | |
551 | } else { | |
552 | printk(PRINT_PREF "error: can read past end of OOB\n"); | |
553 | errcnt += 1; | |
554 | } | |
555 | ||
556 | if (bbt[ebcnt - 1]) | |
557 | printk(PRINT_PREF "skipping end of device tests because last " | |
558 | "block is bad\n"); | |
559 | else { | |
560 | /* Attempt to write off end of device */ | |
0612b9dd | 561 | ops.mode = MTD_OPS_AUTO_OOB; |
e3644da7 AB |
562 | ops.len = 0; |
563 | ops.retlen = 0; | |
564 | ops.ooblen = mtd->ecclayout->oobavail + 1; | |
565 | ops.oobretlen = 0; | |
566 | ops.ooboffs = 0; | |
23d42494 | 567 | ops.datbuf = NULL; |
e3644da7 AB |
568 | ops.oobbuf = writebuf; |
569 | printk(PRINT_PREF "attempting to write past end of device\n"); | |
570 | printk(PRINT_PREF "an error is expected...\n"); | |
a2cc5ba0 | 571 | err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops); |
e3644da7 AB |
572 | if (err) { |
573 | printk(PRINT_PREF "error occurred as expected\n"); | |
574 | err = 0; | |
575 | } else { | |
576 | printk(PRINT_PREF "error: wrote past end of device\n"); | |
577 | errcnt += 1; | |
578 | } | |
579 | ||
580 | /* Attempt to read off end of device */ | |
0612b9dd | 581 | ops.mode = MTD_OPS_AUTO_OOB; |
e3644da7 AB |
582 | ops.len = 0; |
583 | ops.retlen = 0; | |
584 | ops.ooblen = mtd->ecclayout->oobavail + 1; | |
585 | ops.oobretlen = 0; | |
586 | ops.ooboffs = 0; | |
23d42494 | 587 | ops.datbuf = NULL; |
e3644da7 AB |
588 | ops.oobbuf = readbuf; |
589 | printk(PRINT_PREF "attempting to read past end of device\n"); | |
590 | printk(PRINT_PREF "an error is expected...\n"); | |
fd2819bb | 591 | err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops); |
e3644da7 AB |
592 | if (err) { |
593 | printk(PRINT_PREF "error occurred as expected\n"); | |
594 | err = 0; | |
595 | } else { | |
596 | printk(PRINT_PREF "error: read past end of device\n"); | |
597 | errcnt += 1; | |
598 | } | |
599 | ||
600 | err = erase_eraseblock(ebcnt - 1); | |
601 | if (err) | |
602 | goto out; | |
603 | ||
604 | /* Attempt to write off end of device */ | |
0612b9dd | 605 | ops.mode = MTD_OPS_AUTO_OOB; |
e3644da7 AB |
606 | ops.len = 0; |
607 | ops.retlen = 0; | |
608 | ops.ooblen = mtd->ecclayout->oobavail; | |
609 | ops.oobretlen = 0; | |
610 | ops.ooboffs = 1; | |
23d42494 | 611 | ops.datbuf = NULL; |
e3644da7 AB |
612 | ops.oobbuf = writebuf; |
613 | printk(PRINT_PREF "attempting to write past end of device\n"); | |
614 | printk(PRINT_PREF "an error is expected...\n"); | |
a2cc5ba0 | 615 | err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops); |
e3644da7 AB |
616 | if (err) { |
617 | printk(PRINT_PREF "error occurred as expected\n"); | |
618 | err = 0; | |
619 | } else { | |
620 | printk(PRINT_PREF "error: wrote past end of device\n"); | |
621 | errcnt += 1; | |
622 | } | |
623 | ||
624 | /* Attempt to read off end of device */ | |
0612b9dd | 625 | ops.mode = MTD_OPS_AUTO_OOB; |
e3644da7 AB |
626 | ops.len = 0; |
627 | ops.retlen = 0; | |
628 | ops.ooblen = mtd->ecclayout->oobavail; | |
629 | ops.oobretlen = 0; | |
630 | ops.ooboffs = 1; | |
23d42494 | 631 | ops.datbuf = NULL; |
e3644da7 AB |
632 | ops.oobbuf = readbuf; |
633 | printk(PRINT_PREF "attempting to read past end of device\n"); | |
634 | printk(PRINT_PREF "an error is expected...\n"); | |
fd2819bb | 635 | err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops); |
e3644da7 AB |
636 | if (err) { |
637 | printk(PRINT_PREF "error occurred as expected\n"); | |
638 | err = 0; | |
639 | } else { | |
640 | printk(PRINT_PREF "error: read past end of device\n"); | |
641 | errcnt += 1; | |
642 | } | |
643 | } | |
644 | ||
645 | /* Fifth test: write / read across block boundaries */ | |
646 | printk(PRINT_PREF "test 5 of 5\n"); | |
647 | ||
648 | /* Erase all eraseblocks */ | |
649 | err = erase_whole_device(); | |
650 | if (err) | |
651 | goto out; | |
652 | ||
653 | /* Write all eraseblocks */ | |
654 | simple_srand(11); | |
655 | printk(PRINT_PREF "writing OOBs of whole device\n"); | |
656 | for (i = 0; i < ebcnt - 1; ++i) { | |
657 | int cnt = 2; | |
658 | int pg; | |
659 | size_t sz = mtd->ecclayout->oobavail; | |
660 | if (bbt[i] || bbt[i + 1]) | |
661 | continue; | |
662 | addr = (i + 1) * mtd->erasesize - mtd->writesize; | |
663 | for (pg = 0; pg < cnt; ++pg) { | |
664 | set_random_data(writebuf, sz); | |
0612b9dd | 665 | ops.mode = MTD_OPS_AUTO_OOB; |
e3644da7 AB |
666 | ops.len = 0; |
667 | ops.retlen = 0; | |
668 | ops.ooblen = sz; | |
669 | ops.oobretlen = 0; | |
670 | ops.ooboffs = 0; | |
23d42494 | 671 | ops.datbuf = NULL; |
e3644da7 | 672 | ops.oobbuf = writebuf; |
a2cc5ba0 | 673 | err = mtd_write_oob(mtd, addr, &ops); |
e3644da7 AB |
674 | if (err) |
675 | goto out; | |
676 | if (i % 256 == 0) | |
677 | printk(PRINT_PREF "written up to eraseblock " | |
678 | "%u\n", i); | |
679 | cond_resched(); | |
680 | addr += mtd->writesize; | |
681 | } | |
682 | } | |
683 | printk(PRINT_PREF "written %u eraseblocks\n", i); | |
684 | ||
685 | /* Check all eraseblocks */ | |
686 | simple_srand(11); | |
687 | printk(PRINT_PREF "verifying all eraseblocks\n"); | |
688 | for (i = 0; i < ebcnt - 1; ++i) { | |
689 | if (bbt[i] || bbt[i + 1]) | |
690 | continue; | |
691 | set_random_data(writebuf, mtd->ecclayout->oobavail * 2); | |
692 | addr = (i + 1) * mtd->erasesize - mtd->writesize; | |
0612b9dd | 693 | ops.mode = MTD_OPS_AUTO_OOB; |
e3644da7 AB |
694 | ops.len = 0; |
695 | ops.retlen = 0; | |
696 | ops.ooblen = mtd->ecclayout->oobavail * 2; | |
697 | ops.oobretlen = 0; | |
698 | ops.ooboffs = 0; | |
23d42494 | 699 | ops.datbuf = NULL; |
e3644da7 | 700 | ops.oobbuf = readbuf; |
fd2819bb | 701 | err = mtd_read_oob(mtd, addr, &ops); |
e3644da7 AB |
702 | if (err) |
703 | goto out; | |
704 | if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) { | |
705 | printk(PRINT_PREF "error: verify failed at %#llx\n", | |
706 | (long long)addr); | |
707 | errcnt += 1; | |
708 | if (errcnt > 1000) { | |
709 | printk(PRINT_PREF "error: too many errors\n"); | |
710 | goto out; | |
711 | } | |
712 | } | |
713 | if (i % 256 == 0) | |
714 | printk(PRINT_PREF "verified up to eraseblock %u\n", i); | |
715 | cond_resched(); | |
716 | } | |
717 | printk(PRINT_PREF "verified %u eraseblocks\n", i); | |
718 | ||
719 | printk(PRINT_PREF "finished with %d errors\n", errcnt); | |
720 | out: | |
721 | kfree(bbt); | |
722 | kfree(writebuf); | |
723 | kfree(readbuf); | |
724 | put_mtd_device(mtd); | |
725 | if (err) | |
726 | printk(PRINT_PREF "error %d occurred\n", err); | |
727 | printk(KERN_INFO "=================================================\n"); | |
728 | return err; | |
729 | } | |
730 | module_init(mtd_oobtest_init); | |
731 | ||
732 | static void __exit mtd_oobtest_exit(void) | |
733 | { | |
734 | return; | |
735 | } | |
736 | module_exit(mtd_oobtest_exit); | |
737 | ||
738 | MODULE_DESCRIPTION("Out-of-band test module"); | |
739 | MODULE_AUTHOR("Adrian Hunter"); | |
740 | MODULE_LICENSE("GPL"); |