x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / drivers / mtd / tests / subpagetest.c
blobaecc6ce5a9e1c131a38d657325356ab590de845c
1 /*
2 * Copyright (C) 2006-2007 Nokia Corporation
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.
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.
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.
17 * Test sub-page read and write on MTD device.
18 * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
29 #include <linux/slab.h>
30 #include <linux/sched.h>
31 #include <linux/random.h>
33 #include "mtd_test.h"
35 static int dev = -EINVAL;
36 module_param(dev, int, S_IRUGO);
37 MODULE_PARM_DESC(dev, "MTD device number to use");
39 static struct mtd_info *mtd;
40 static unsigned char *writebuf;
41 static unsigned char *readbuf;
42 static unsigned char *bbt;
44 static int subpgsize;
45 static int bufsize;
46 static int ebcnt;
47 static int pgcnt;
48 static int errcnt;
49 static struct rnd_state rnd_state;
51 static inline void clear_data(unsigned char *buf, size_t len)
53 memset(buf, 0, len);
56 static int write_eraseblock(int ebnum)
58 size_t written;
59 int err = 0;
60 loff_t addr = (loff_t)ebnum * mtd->erasesize;
62 prandom_bytes_state(&rnd_state, writebuf, subpgsize);
63 err = mtd_write(mtd, addr, subpgsize, &written, writebuf);
64 if (unlikely(err || written != subpgsize)) {
65 pr_err("error: write failed at %#llx\n",
66 (long long)addr);
67 if (written != subpgsize) {
68 pr_err(" write size: %#x\n", subpgsize);
69 pr_err(" written: %#zx\n", written);
71 return err ? err : -1;
74 addr += subpgsize;
76 prandom_bytes_state(&rnd_state, writebuf, subpgsize);
77 err = mtd_write(mtd, addr, subpgsize, &written, writebuf);
78 if (unlikely(err || written != subpgsize)) {
79 pr_err("error: write failed at %#llx\n",
80 (long long)addr);
81 if (written != subpgsize) {
82 pr_err(" write size: %#x\n", subpgsize);
83 pr_err(" written: %#zx\n", written);
85 return err ? err : -1;
88 return err;
91 static int write_eraseblock2(int ebnum)
93 size_t written;
94 int err = 0, k;
95 loff_t addr = (loff_t)ebnum * mtd->erasesize;
97 for (k = 1; k < 33; ++k) {
98 if (addr + (subpgsize * k) > (loff_t)(ebnum + 1) * mtd->erasesize)
99 break;
100 prandom_bytes_state(&rnd_state, writebuf, subpgsize * k);
101 err = mtd_write(mtd, addr, subpgsize * k, &written, writebuf);
102 if (unlikely(err || written != subpgsize * k)) {
103 pr_err("error: write failed at %#llx\n",
104 (long long)addr);
105 if (written != subpgsize) {
106 pr_err(" write size: %#x\n",
107 subpgsize * k);
108 pr_err(" written: %#08zx\n",
109 written);
111 return err ? err : -1;
113 addr += subpgsize * k;
116 return err;
119 static void print_subpage(unsigned char *p)
121 int i, j;
123 for (i = 0; i < subpgsize; ) {
124 for (j = 0; i < subpgsize && j < 32; ++i, ++j)
125 printk("%02x", *p++);
126 printk("\n");
130 static int verify_eraseblock(int ebnum)
132 size_t read;
133 int err = 0;
134 loff_t addr = (loff_t)ebnum * mtd->erasesize;
136 prandom_bytes_state(&rnd_state, writebuf, subpgsize);
137 clear_data(readbuf, subpgsize);
138 err = mtd_read(mtd, addr, subpgsize, &read, readbuf);
139 if (unlikely(err || read != subpgsize)) {
140 if (mtd_is_bitflip(err) && read == subpgsize) {
141 pr_info("ECC correction at %#llx\n",
142 (long long)addr);
143 err = 0;
144 } else {
145 pr_err("error: read failed at %#llx\n",
146 (long long)addr);
147 return err ? err : -1;
150 if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
151 pr_err("error: verify failed at %#llx\n",
152 (long long)addr);
153 pr_info("------------- written----------------\n");
154 print_subpage(writebuf);
155 pr_info("------------- read ------------------\n");
156 print_subpage(readbuf);
157 pr_info("-------------------------------------\n");
158 errcnt += 1;
161 addr += subpgsize;
163 prandom_bytes_state(&rnd_state, writebuf, subpgsize);
164 clear_data(readbuf, subpgsize);
165 err = mtd_read(mtd, addr, subpgsize, &read, readbuf);
166 if (unlikely(err || read != subpgsize)) {
167 if (mtd_is_bitflip(err) && read == subpgsize) {
168 pr_info("ECC correction at %#llx\n",
169 (long long)addr);
170 err = 0;
171 } else {
172 pr_err("error: read failed at %#llx\n",
173 (long long)addr);
174 return err ? err : -1;
177 if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
178 pr_info("error: verify failed at %#llx\n",
179 (long long)addr);
180 pr_info("------------- written----------------\n");
181 print_subpage(writebuf);
182 pr_info("------------- read ------------------\n");
183 print_subpage(readbuf);
184 pr_info("-------------------------------------\n");
185 errcnt += 1;
188 return err;
191 static int verify_eraseblock2(int ebnum)
193 size_t read;
194 int err = 0, k;
195 loff_t addr = (loff_t)ebnum * mtd->erasesize;
197 for (k = 1; k < 33; ++k) {
198 if (addr + (subpgsize * k) > (loff_t)(ebnum + 1) * mtd->erasesize)
199 break;
200 prandom_bytes_state(&rnd_state, writebuf, subpgsize * k);
201 clear_data(readbuf, subpgsize * k);
202 err = mtd_read(mtd, addr, subpgsize * k, &read, readbuf);
203 if (unlikely(err || read != subpgsize * k)) {
204 if (mtd_is_bitflip(err) && read == subpgsize * k) {
205 pr_info("ECC correction at %#llx\n",
206 (long long)addr);
207 err = 0;
208 } else {
209 pr_err("error: read failed at "
210 "%#llx\n", (long long)addr);
211 return err ? err : -1;
214 if (unlikely(memcmp(readbuf, writebuf, subpgsize * k))) {
215 pr_err("error: verify failed at %#llx\n",
216 (long long)addr);
217 errcnt += 1;
219 addr += subpgsize * k;
222 return err;
225 static int verify_eraseblock_ff(int ebnum)
227 uint32_t j;
228 size_t read;
229 int err = 0;
230 loff_t addr = (loff_t)ebnum * mtd->erasesize;
232 memset(writebuf, 0xff, subpgsize);
233 for (j = 0; j < mtd->erasesize / subpgsize; ++j) {
234 clear_data(readbuf, subpgsize);
235 err = mtd_read(mtd, addr, subpgsize, &read, readbuf);
236 if (unlikely(err || read != subpgsize)) {
237 if (mtd_is_bitflip(err) && read == subpgsize) {
238 pr_info("ECC correction at %#llx\n",
239 (long long)addr);
240 err = 0;
241 } else {
242 pr_err("error: read failed at "
243 "%#llx\n", (long long)addr);
244 return err ? err : -1;
247 if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
248 pr_err("error: verify 0xff failed at "
249 "%#llx\n", (long long)addr);
250 errcnt += 1;
252 addr += subpgsize;
255 return err;
258 static int verify_all_eraseblocks_ff(void)
260 int err;
261 unsigned int i;
263 pr_info("verifying all eraseblocks for 0xff\n");
264 for (i = 0; i < ebcnt; ++i) {
265 if (bbt[i])
266 continue;
267 err = verify_eraseblock_ff(i);
268 if (err)
269 return err;
270 if (i % 256 == 0)
271 pr_info("verified up to eraseblock %u\n", i);
273 err = mtdtest_relax();
274 if (err)
275 return err;
277 pr_info("verified %u eraseblocks\n", i);
278 return 0;
281 static int __init mtd_subpagetest_init(void)
283 int err = 0;
284 uint32_t i;
285 uint64_t tmp;
287 printk(KERN_INFO "\n");
288 printk(KERN_INFO "=================================================\n");
290 if (dev < 0) {
291 pr_info("Please specify a valid mtd-device via module parameter\n");
292 pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
293 return -EINVAL;
296 pr_info("MTD device: %d\n", dev);
298 mtd = get_mtd_device(NULL, dev);
299 if (IS_ERR(mtd)) {
300 err = PTR_ERR(mtd);
301 pr_err("error: cannot get MTD device\n");
302 return err;
305 if (!mtd_type_is_nand(mtd)) {
306 pr_info("this test requires NAND flash\n");
307 goto out;
310 subpgsize = mtd->writesize >> mtd->subpage_sft;
311 tmp = mtd->size;
312 do_div(tmp, mtd->erasesize);
313 ebcnt = tmp;
314 pgcnt = mtd->erasesize / mtd->writesize;
316 pr_info("MTD device size %llu, eraseblock size %u, "
317 "page size %u, subpage size %u, count of eraseblocks %u, "
318 "pages per eraseblock %u, OOB size %u\n",
319 (unsigned long long)mtd->size, mtd->erasesize,
320 mtd->writesize, subpgsize, ebcnt, pgcnt, mtd->oobsize);
322 err = -ENOMEM;
323 bufsize = subpgsize * 32;
324 writebuf = kmalloc(bufsize, GFP_KERNEL);
325 if (!writebuf)
326 goto out;
327 readbuf = kmalloc(bufsize, GFP_KERNEL);
328 if (!readbuf)
329 goto out;
330 bbt = kzalloc(ebcnt, GFP_KERNEL);
331 if (!bbt)
332 goto out;
334 err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt);
335 if (err)
336 goto out;
338 err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
339 if (err)
340 goto out;
342 pr_info("writing whole device\n");
343 prandom_seed_state(&rnd_state, 1);
344 for (i = 0; i < ebcnt; ++i) {
345 if (bbt[i])
346 continue;
347 err = write_eraseblock(i);
348 if (unlikely(err))
349 goto out;
350 if (i % 256 == 0)
351 pr_info("written up to eraseblock %u\n", i);
353 err = mtdtest_relax();
354 if (err)
355 goto out;
357 pr_info("written %u eraseblocks\n", i);
359 prandom_seed_state(&rnd_state, 1);
360 pr_info("verifying all eraseblocks\n");
361 for (i = 0; i < ebcnt; ++i) {
362 if (bbt[i])
363 continue;
364 err = verify_eraseblock(i);
365 if (unlikely(err))
366 goto out;
367 if (i % 256 == 0)
368 pr_info("verified up to eraseblock %u\n", i);
370 err = mtdtest_relax();
371 if (err)
372 goto out;
374 pr_info("verified %u eraseblocks\n", i);
376 err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
377 if (err)
378 goto out;
380 err = verify_all_eraseblocks_ff();
381 if (err)
382 goto out;
384 /* Write all eraseblocks */
385 prandom_seed_state(&rnd_state, 3);
386 pr_info("writing whole device\n");
387 for (i = 0; i < ebcnt; ++i) {
388 if (bbt[i])
389 continue;
390 err = write_eraseblock2(i);
391 if (unlikely(err))
392 goto out;
393 if (i % 256 == 0)
394 pr_info("written up to eraseblock %u\n", i);
396 err = mtdtest_relax();
397 if (err)
398 goto out;
400 pr_info("written %u eraseblocks\n", i);
402 /* Check all eraseblocks */
403 prandom_seed_state(&rnd_state, 3);
404 pr_info("verifying all eraseblocks\n");
405 for (i = 0; i < ebcnt; ++i) {
406 if (bbt[i])
407 continue;
408 err = verify_eraseblock2(i);
409 if (unlikely(err))
410 goto out;
411 if (i % 256 == 0)
412 pr_info("verified up to eraseblock %u\n", i);
414 err = mtdtest_relax();
415 if (err)
416 goto out;
418 pr_info("verified %u eraseblocks\n", i);
420 err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
421 if (err)
422 goto out;
424 err = verify_all_eraseblocks_ff();
425 if (err)
426 goto out;
428 pr_info("finished with %d errors\n", errcnt);
430 out:
431 kfree(bbt);
432 kfree(readbuf);
433 kfree(writebuf);
434 put_mtd_device(mtd);
435 if (err)
436 pr_info("error %d occurred\n", err);
437 printk(KERN_INFO "=================================================\n");
438 return err;
440 module_init(mtd_subpagetest_init);
442 static void __exit mtd_subpagetest_exit(void)
444 return;
446 module_exit(mtd_subpagetest_exit);
448 MODULE_DESCRIPTION("Subpage test module");
449 MODULE_AUTHOR("Adrian Hunter");
450 MODULE_LICENSE("GPL");