Commit | Line | Data |
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72069be9 AB |
1 | /* |
2 | * Copyright (C) 2007 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 read and write speed of a MTD device. | |
18 | * | |
fc7fe769 | 19 | * Author: Adrian Hunter <adrian.hunter@nokia.com> |
72069be9 AB |
20 | */ |
21 | ||
22 | #include <linux/init.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/moduleparam.h> | |
25 | #include <linux/err.h> | |
26 | #include <linux/mtd/mtd.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
72069be9 AB |
28 | #include <linux/sched.h> |
29 | ||
30 | #define PRINT_PREF KERN_INFO "mtd_speedtest: " | |
31 | ||
7406060e | 32 | static int dev = -EINVAL; |
72069be9 AB |
33 | module_param(dev, int, S_IRUGO); |
34 | MODULE_PARM_DESC(dev, "MTD device number to use"); | |
35 | ||
fc7fe769 AH |
36 | static int count; |
37 | module_param(count, int, S_IRUGO); | |
38 | MODULE_PARM_DESC(count, "Maximum number of eraseblocks to use " | |
39 | "(0 means use all)"); | |
40 | ||
72069be9 AB |
41 | static struct mtd_info *mtd; |
42 | static unsigned char *iobuf; | |
43 | static unsigned char *bbt; | |
44 | ||
45 | static int pgsize; | |
46 | static int ebcnt; | |
47 | static int pgcnt; | |
48 | static int goodebcnt; | |
49 | static struct timeval start, finish; | |
50 | static unsigned long next = 1; | |
51 | ||
52 | static inline unsigned int simple_rand(void) | |
53 | { | |
54 | next = next * 1103515245 + 12345; | |
55 | return (unsigned int)((next / 65536) % 32768); | |
56 | } | |
57 | ||
58 | static inline void simple_srand(unsigned long seed) | |
59 | { | |
60 | next = seed; | |
61 | } | |
62 | ||
63 | static void set_random_data(unsigned char *buf, size_t len) | |
64 | { | |
65 | size_t i; | |
66 | ||
67 | for (i = 0; i < len; ++i) | |
68 | buf[i] = simple_rand(); | |
69 | } | |
70 | ||
71 | static int erase_eraseblock(int ebnum) | |
72 | { | |
73 | int err; | |
74 | struct erase_info ei; | |
75 | loff_t addr = ebnum * mtd->erasesize; | |
76 | ||
77 | memset(&ei, 0, sizeof(struct erase_info)); | |
78 | ei.mtd = mtd; | |
79 | ei.addr = addr; | |
80 | ei.len = mtd->erasesize; | |
81 | ||
7e1f0dc0 | 82 | err = mtd_erase(mtd, &ei); |
72069be9 AB |
83 | if (err) { |
84 | printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum); | |
85 | return err; | |
86 | } | |
87 | ||
88 | if (ei.state == MTD_ERASE_FAILED) { | |
89 | printk(PRINT_PREF "some erase error occurred at EB %d\n", | |
90 | ebnum); | |
91 | return -EIO; | |
92 | } | |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
4085bcc6 RT |
97 | static int multiblock_erase(int ebnum, int blocks) |
98 | { | |
99 | int err; | |
100 | struct erase_info ei; | |
101 | loff_t addr = ebnum * mtd->erasesize; | |
102 | ||
103 | memset(&ei, 0, sizeof(struct erase_info)); | |
104 | ei.mtd = mtd; | |
105 | ei.addr = addr; | |
106 | ei.len = mtd->erasesize * blocks; | |
107 | ||
7e1f0dc0 | 108 | err = mtd_erase(mtd, &ei); |
4085bcc6 RT |
109 | if (err) { |
110 | printk(PRINT_PREF "error %d while erasing EB %d, blocks %d\n", | |
111 | err, ebnum, blocks); | |
112 | return err; | |
113 | } | |
114 | ||
115 | if (ei.state == MTD_ERASE_FAILED) { | |
116 | printk(PRINT_PREF "some erase error occurred at EB %d," | |
117 | "blocks %d\n", ebnum, blocks); | |
118 | return -EIO; | |
119 | } | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
72069be9 AB |
124 | static int erase_whole_device(void) |
125 | { | |
126 | int err; | |
127 | unsigned int i; | |
128 | ||
129 | for (i = 0; i < ebcnt; ++i) { | |
130 | if (bbt[i]) | |
131 | continue; | |
132 | err = erase_eraseblock(i); | |
133 | if (err) | |
134 | return err; | |
135 | cond_resched(); | |
136 | } | |
137 | return 0; | |
138 | } | |
139 | ||
140 | static int write_eraseblock(int ebnum) | |
141 | { | |
30fa9848 | 142 | size_t written; |
72069be9 AB |
143 | int err = 0; |
144 | loff_t addr = ebnum * mtd->erasesize; | |
145 | ||
eda95cbf | 146 | err = mtd_write(mtd, addr, mtd->erasesize, &written, iobuf); |
72069be9 AB |
147 | if (err || written != mtd->erasesize) { |
148 | printk(PRINT_PREF "error: write failed at %#llx\n", addr); | |
149 | if (!err) | |
150 | err = -EINVAL; | |
151 | } | |
152 | ||
153 | return err; | |
154 | } | |
155 | ||
156 | static int write_eraseblock_by_page(int ebnum) | |
157 | { | |
30fa9848 | 158 | size_t written; |
72069be9 AB |
159 | int i, err = 0; |
160 | loff_t addr = ebnum * mtd->erasesize; | |
161 | void *buf = iobuf; | |
162 | ||
163 | for (i = 0; i < pgcnt; i++) { | |
eda95cbf | 164 | err = mtd_write(mtd, addr, pgsize, &written, buf); |
72069be9 AB |
165 | if (err || written != pgsize) { |
166 | printk(PRINT_PREF "error: write failed at %#llx\n", | |
167 | addr); | |
168 | if (!err) | |
169 | err = -EINVAL; | |
170 | break; | |
171 | } | |
172 | addr += pgsize; | |
173 | buf += pgsize; | |
174 | } | |
175 | ||
176 | return err; | |
177 | } | |
178 | ||
179 | static int write_eraseblock_by_2pages(int ebnum) | |
180 | { | |
30fa9848 | 181 | size_t written, sz = pgsize * 2; |
72069be9 AB |
182 | int i, n = pgcnt / 2, err = 0; |
183 | loff_t addr = ebnum * mtd->erasesize; | |
184 | void *buf = iobuf; | |
185 | ||
186 | for (i = 0; i < n; i++) { | |
eda95cbf | 187 | err = mtd_write(mtd, addr, sz, &written, buf); |
72069be9 AB |
188 | if (err || written != sz) { |
189 | printk(PRINT_PREF "error: write failed at %#llx\n", | |
190 | addr); | |
191 | if (!err) | |
192 | err = -EINVAL; | |
193 | return err; | |
194 | } | |
195 | addr += sz; | |
196 | buf += sz; | |
197 | } | |
198 | if (pgcnt % 2) { | |
eda95cbf | 199 | err = mtd_write(mtd, addr, pgsize, &written, buf); |
72069be9 AB |
200 | if (err || written != pgsize) { |
201 | printk(PRINT_PREF "error: write failed at %#llx\n", | |
202 | addr); | |
203 | if (!err) | |
204 | err = -EINVAL; | |
205 | } | |
206 | } | |
207 | ||
208 | return err; | |
209 | } | |
210 | ||
211 | static int read_eraseblock(int ebnum) | |
212 | { | |
30fa9848 | 213 | size_t read; |
72069be9 AB |
214 | int err = 0; |
215 | loff_t addr = ebnum * mtd->erasesize; | |
216 | ||
329ad399 | 217 | err = mtd_read(mtd, addr, mtd->erasesize, &read, iobuf); |
72069be9 | 218 | /* Ignore corrected ECC errors */ |
d57f4054 | 219 | if (mtd_is_bitflip(err)) |
72069be9 AB |
220 | err = 0; |
221 | if (err || read != mtd->erasesize) { | |
222 | printk(PRINT_PREF "error: read failed at %#llx\n", addr); | |
223 | if (!err) | |
224 | err = -EINVAL; | |
225 | } | |
226 | ||
227 | return err; | |
228 | } | |
229 | ||
230 | static int read_eraseblock_by_page(int ebnum) | |
231 | { | |
30fa9848 | 232 | size_t read; |
72069be9 AB |
233 | int i, err = 0; |
234 | loff_t addr = ebnum * mtd->erasesize; | |
235 | void *buf = iobuf; | |
236 | ||
237 | for (i = 0; i < pgcnt; i++) { | |
329ad399 | 238 | err = mtd_read(mtd, addr, pgsize, &read, buf); |
72069be9 | 239 | /* Ignore corrected ECC errors */ |
d57f4054 | 240 | if (mtd_is_bitflip(err)) |
72069be9 AB |
241 | err = 0; |
242 | if (err || read != pgsize) { | |
243 | printk(PRINT_PREF "error: read failed at %#llx\n", | |
244 | addr); | |
245 | if (!err) | |
246 | err = -EINVAL; | |
247 | break; | |
248 | } | |
249 | addr += pgsize; | |
250 | buf += pgsize; | |
251 | } | |
252 | ||
253 | return err; | |
254 | } | |
255 | ||
256 | static int read_eraseblock_by_2pages(int ebnum) | |
257 | { | |
30fa9848 | 258 | size_t read, sz = pgsize * 2; |
72069be9 AB |
259 | int i, n = pgcnt / 2, err = 0; |
260 | loff_t addr = ebnum * mtd->erasesize; | |
261 | void *buf = iobuf; | |
262 | ||
263 | for (i = 0; i < n; i++) { | |
329ad399 | 264 | err = mtd_read(mtd, addr, sz, &read, buf); |
72069be9 | 265 | /* Ignore corrected ECC errors */ |
d57f4054 | 266 | if (mtd_is_bitflip(err)) |
72069be9 AB |
267 | err = 0; |
268 | if (err || read != sz) { | |
269 | printk(PRINT_PREF "error: read failed at %#llx\n", | |
270 | addr); | |
271 | if (!err) | |
272 | err = -EINVAL; | |
273 | return err; | |
274 | } | |
275 | addr += sz; | |
276 | buf += sz; | |
277 | } | |
278 | if (pgcnt % 2) { | |
329ad399 | 279 | err = mtd_read(mtd, addr, pgsize, &read, buf); |
72069be9 | 280 | /* Ignore corrected ECC errors */ |
d57f4054 | 281 | if (mtd_is_bitflip(err)) |
72069be9 AB |
282 | err = 0; |
283 | if (err || read != pgsize) { | |
284 | printk(PRINT_PREF "error: read failed at %#llx\n", | |
285 | addr); | |
286 | if (!err) | |
287 | err = -EINVAL; | |
288 | } | |
289 | } | |
290 | ||
291 | return err; | |
292 | } | |
293 | ||
294 | static int is_block_bad(int ebnum) | |
295 | { | |
296 | loff_t addr = ebnum * mtd->erasesize; | |
297 | int ret; | |
298 | ||
7086c19d | 299 | ret = mtd_block_isbad(mtd, addr); |
72069be9 AB |
300 | if (ret) |
301 | printk(PRINT_PREF "block %d is bad\n", ebnum); | |
302 | return ret; | |
303 | } | |
304 | ||
305 | static inline void start_timing(void) | |
306 | { | |
307 | do_gettimeofday(&start); | |
308 | } | |
309 | ||
310 | static inline void stop_timing(void) | |
311 | { | |
312 | do_gettimeofday(&finish); | |
313 | } | |
314 | ||
315 | static long calc_speed(void) | |
316 | { | |
e70727e4 DL |
317 | uint64_t k; |
318 | long ms; | |
72069be9 AB |
319 | |
320 | ms = (finish.tv_sec - start.tv_sec) * 1000 + | |
321 | (finish.tv_usec - start.tv_usec) / 1000; | |
e70727e4 DL |
322 | if (ms == 0) |
323 | return 0; | |
324 | k = goodebcnt * (mtd->erasesize / 1024) * 1000; | |
325 | do_div(k, ms); | |
326 | return k; | |
72069be9 AB |
327 | } |
328 | ||
329 | static int scan_for_bad_eraseblocks(void) | |
330 | { | |
331 | int i, bad = 0; | |
332 | ||
2bfefa4c | 333 | bbt = kzalloc(ebcnt, GFP_KERNEL); |
72069be9 AB |
334 | if (!bbt) { |
335 | printk(PRINT_PREF "error: cannot allocate memory\n"); | |
336 | return -ENOMEM; | |
337 | } | |
72069be9 | 338 | |
f5e2bae0 MTS |
339 | /* NOR flash does not implement block_isbad */ |
340 | if (mtd->block_isbad == NULL) | |
341 | goto out; | |
342 | ||
72069be9 AB |
343 | printk(PRINT_PREF "scanning for bad eraseblocks\n"); |
344 | for (i = 0; i < ebcnt; ++i) { | |
345 | bbt[i] = is_block_bad(i) ? 1 : 0; | |
346 | if (bbt[i]) | |
347 | bad += 1; | |
348 | cond_resched(); | |
349 | } | |
350 | printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad); | |
f5e2bae0 | 351 | out: |
72069be9 AB |
352 | goodebcnt = ebcnt - bad; |
353 | return 0; | |
354 | } | |
355 | ||
356 | static int __init mtd_speedtest_init(void) | |
357 | { | |
4085bcc6 | 358 | int err, i, blocks, j, k; |
72069be9 AB |
359 | long speed; |
360 | uint64_t tmp; | |
361 | ||
362 | printk(KERN_INFO "\n"); | |
363 | printk(KERN_INFO "=================================================\n"); | |
7406060e WS |
364 | |
365 | if (dev < 0) { | |
366 | printk(PRINT_PREF "Please specify a valid mtd-device via module paramter\n"); | |
367 | printk(KERN_CRIT "CAREFUL: This test wipes all data on the specified MTD device!\n"); | |
368 | return -EINVAL; | |
369 | } | |
370 | ||
fc7fe769 AH |
371 | if (count) |
372 | printk(PRINT_PREF "MTD device: %d count: %d\n", dev, count); | |
373 | else | |
374 | printk(PRINT_PREF "MTD device: %d\n", dev); | |
72069be9 AB |
375 | |
376 | mtd = get_mtd_device(NULL, dev); | |
377 | if (IS_ERR(mtd)) { | |
378 | err = PTR_ERR(mtd); | |
379 | printk(PRINT_PREF "error: cannot get MTD device\n"); | |
380 | return err; | |
381 | } | |
382 | ||
383 | if (mtd->writesize == 1) { | |
384 | printk(PRINT_PREF "not NAND flash, assume page size is 512 " | |
385 | "bytes.\n"); | |
386 | pgsize = 512; | |
387 | } else | |
388 | pgsize = mtd->writesize; | |
389 | ||
390 | tmp = mtd->size; | |
391 | do_div(tmp, mtd->erasesize); | |
392 | ebcnt = tmp; | |
f5e2bae0 | 393 | pgcnt = mtd->erasesize / pgsize; |
72069be9 AB |
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 | pgsize, ebcnt, pgcnt, mtd->oobsize); | |
400 | ||
fc7fe769 AH |
401 | if (count > 0 && count < ebcnt) |
402 | ebcnt = count; | |
403 | ||
72069be9 AB |
404 | err = -ENOMEM; |
405 | iobuf = kmalloc(mtd->erasesize, GFP_KERNEL); | |
406 | if (!iobuf) { | |
407 | printk(PRINT_PREF "error: cannot allocate memory\n"); | |
408 | goto out; | |
409 | } | |
410 | ||
411 | simple_srand(1); | |
412 | set_random_data(iobuf, mtd->erasesize); | |
413 | ||
414 | err = scan_for_bad_eraseblocks(); | |
415 | if (err) | |
416 | goto out; | |
417 | ||
418 | err = erase_whole_device(); | |
419 | if (err) | |
420 | goto out; | |
421 | ||
422 | /* Write all eraseblocks, 1 eraseblock at a time */ | |
423 | printk(PRINT_PREF "testing eraseblock write speed\n"); | |
424 | start_timing(); | |
425 | for (i = 0; i < ebcnt; ++i) { | |
426 | if (bbt[i]) | |
427 | continue; | |
428 | err = write_eraseblock(i); | |
429 | if (err) | |
430 | goto out; | |
431 | cond_resched(); | |
432 | } | |
433 | stop_timing(); | |
434 | speed = calc_speed(); | |
435 | printk(PRINT_PREF "eraseblock write speed is %ld KiB/s\n", speed); | |
436 | ||
437 | /* Read all eraseblocks, 1 eraseblock at a time */ | |
438 | printk(PRINT_PREF "testing eraseblock read speed\n"); | |
439 | start_timing(); | |
440 | for (i = 0; i < ebcnt; ++i) { | |
441 | if (bbt[i]) | |
442 | continue; | |
443 | err = read_eraseblock(i); | |
444 | if (err) | |
445 | goto out; | |
446 | cond_resched(); | |
447 | } | |
448 | stop_timing(); | |
449 | speed = calc_speed(); | |
450 | printk(PRINT_PREF "eraseblock read speed is %ld KiB/s\n", speed); | |
451 | ||
452 | err = erase_whole_device(); | |
453 | if (err) | |
454 | goto out; | |
455 | ||
456 | /* Write all eraseblocks, 1 page at a time */ | |
457 | printk(PRINT_PREF "testing page write speed\n"); | |
458 | start_timing(); | |
459 | for (i = 0; i < ebcnt; ++i) { | |
460 | if (bbt[i]) | |
461 | continue; | |
462 | err = write_eraseblock_by_page(i); | |
463 | if (err) | |
464 | goto out; | |
465 | cond_resched(); | |
466 | } | |
467 | stop_timing(); | |
468 | speed = calc_speed(); | |
469 | printk(PRINT_PREF "page write speed is %ld KiB/s\n", speed); | |
470 | ||
471 | /* Read all eraseblocks, 1 page at a time */ | |
472 | printk(PRINT_PREF "testing page read speed\n"); | |
473 | start_timing(); | |
474 | for (i = 0; i < ebcnt; ++i) { | |
475 | if (bbt[i]) | |
476 | continue; | |
477 | err = read_eraseblock_by_page(i); | |
478 | if (err) | |
479 | goto out; | |
480 | cond_resched(); | |
481 | } | |
482 | stop_timing(); | |
483 | speed = calc_speed(); | |
484 | printk(PRINT_PREF "page read speed is %ld KiB/s\n", speed); | |
485 | ||
486 | err = erase_whole_device(); | |
487 | if (err) | |
488 | goto out; | |
489 | ||
490 | /* Write all eraseblocks, 2 pages at a time */ | |
491 | printk(PRINT_PREF "testing 2 page write speed\n"); | |
492 | start_timing(); | |
493 | for (i = 0; i < ebcnt; ++i) { | |
494 | if (bbt[i]) | |
495 | continue; | |
496 | err = write_eraseblock_by_2pages(i); | |
497 | if (err) | |
498 | goto out; | |
499 | cond_resched(); | |
500 | } | |
501 | stop_timing(); | |
502 | speed = calc_speed(); | |
503 | printk(PRINT_PREF "2 page write speed is %ld KiB/s\n", speed); | |
504 | ||
505 | /* Read all eraseblocks, 2 pages at a time */ | |
506 | printk(PRINT_PREF "testing 2 page read speed\n"); | |
507 | start_timing(); | |
508 | for (i = 0; i < ebcnt; ++i) { | |
509 | if (bbt[i]) | |
510 | continue; | |
511 | err = read_eraseblock_by_2pages(i); | |
512 | if (err) | |
513 | goto out; | |
514 | cond_resched(); | |
515 | } | |
516 | stop_timing(); | |
517 | speed = calc_speed(); | |
518 | printk(PRINT_PREF "2 page read speed is %ld KiB/s\n", speed); | |
519 | ||
520 | /* Erase all eraseblocks */ | |
521 | printk(PRINT_PREF "Testing erase speed\n"); | |
522 | start_timing(); | |
523 | for (i = 0; i < ebcnt; ++i) { | |
524 | if (bbt[i]) | |
525 | continue; | |
526 | err = erase_eraseblock(i); | |
527 | if (err) | |
528 | goto out; | |
529 | cond_resched(); | |
530 | } | |
531 | stop_timing(); | |
532 | speed = calc_speed(); | |
533 | printk(PRINT_PREF "erase speed is %ld KiB/s\n", speed); | |
534 | ||
4085bcc6 RT |
535 | /* Multi-block erase all eraseblocks */ |
536 | for (k = 1; k < 7; k++) { | |
537 | blocks = 1 << k; | |
538 | printk(PRINT_PREF "Testing %dx multi-block erase speed\n", | |
539 | blocks); | |
540 | start_timing(); | |
541 | for (i = 0; i < ebcnt; ) { | |
542 | for (j = 0; j < blocks && (i + j) < ebcnt; j++) | |
543 | if (bbt[i + j]) | |
544 | break; | |
545 | if (j < 1) { | |
546 | i++; | |
547 | continue; | |
548 | } | |
549 | err = multiblock_erase(i, j); | |
550 | if (err) | |
551 | goto out; | |
552 | cond_resched(); | |
553 | i += j; | |
554 | } | |
555 | stop_timing(); | |
556 | speed = calc_speed(); | |
557 | printk(PRINT_PREF "%dx multi-block erase speed is %ld KiB/s\n", | |
558 | blocks, speed); | |
559 | } | |
72069be9 AB |
560 | printk(PRINT_PREF "finished\n"); |
561 | out: | |
562 | kfree(iobuf); | |
563 | kfree(bbt); | |
564 | put_mtd_device(mtd); | |
565 | if (err) | |
566 | printk(PRINT_PREF "error %d occurred\n", err); | |
567 | printk(KERN_INFO "=================================================\n"); | |
568 | return err; | |
569 | } | |
570 | module_init(mtd_speedtest_init); | |
571 | ||
572 | static void __exit mtd_speedtest_exit(void) | |
573 | { | |
574 | return; | |
575 | } | |
576 | module_exit(mtd_speedtest_exit); | |
577 | ||
578 | MODULE_DESCRIPTION("Speed test module"); | |
579 | MODULE_AUTHOR("Adrian Hunter"); | |
580 | MODULE_LICENSE("GPL"); |