538 строки
13 KiB
C
538 строки
13 KiB
C
/*
|
|
* Copyright (C) 2006-2008 Artem Bityutskiy
|
|
* Copyright (C) 2006-2008 Jarkko Lavinen
|
|
* Copyright (C) 2006-2008 Adrian Hunter
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; see the file COPYING. If not, write to the Free Software
|
|
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
* Authors: Artem Bityutskiy, Jarkko Lavinen, Adria Hunter
|
|
*
|
|
* WARNING: this test program may kill your flash and your device. Do not
|
|
* use it unless you know what you do. Authors are not responsible for any
|
|
* damage caused by this program.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/err.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/sched.h>
|
|
|
|
#define PRINT_PREF KERN_INFO "mtd_torturetest: "
|
|
#define RETRIES 3
|
|
|
|
static int eb = 8;
|
|
module_param(eb, int, S_IRUGO);
|
|
MODULE_PARM_DESC(eb, "eraseblock number within the selected MTD device");
|
|
|
|
static int ebcnt = 32;
|
|
module_param(ebcnt, int, S_IRUGO);
|
|
MODULE_PARM_DESC(ebcnt, "number of consecutive eraseblocks to torture");
|
|
|
|
static int pgcnt;
|
|
module_param(pgcnt, int, S_IRUGO);
|
|
MODULE_PARM_DESC(pgcnt, "number of pages per eraseblock to torture (0 => all)");
|
|
|
|
static int dev = -EINVAL;
|
|
module_param(dev, int, S_IRUGO);
|
|
MODULE_PARM_DESC(dev, "MTD device number to use");
|
|
|
|
static int gran = 512;
|
|
module_param(gran, int, S_IRUGO);
|
|
MODULE_PARM_DESC(gran, "how often the status information should be printed");
|
|
|
|
static int check = 1;
|
|
module_param(check, int, S_IRUGO);
|
|
MODULE_PARM_DESC(check, "if the written data should be checked");
|
|
|
|
static unsigned int cycles_count;
|
|
module_param(cycles_count, uint, S_IRUGO);
|
|
MODULE_PARM_DESC(cycles_count, "how many erase cycles to do "
|
|
"(infinite by default)");
|
|
|
|
static struct mtd_info *mtd;
|
|
|
|
/* This buffer contains 0x555555...0xAAAAAA... pattern */
|
|
static unsigned char *patt_5A5;
|
|
/* This buffer contains 0xAAAAAA...0x555555... pattern */
|
|
static unsigned char *patt_A5A;
|
|
/* This buffer contains all 0xFF bytes */
|
|
static unsigned char *patt_FF;
|
|
/* This a temporary buffer is use when checking data */
|
|
static unsigned char *check_buf;
|
|
/* How many erase cycles were done */
|
|
static unsigned int erase_cycles;
|
|
|
|
static int pgsize;
|
|
static struct timeval start, finish;
|
|
|
|
static void report_corrupt(unsigned char *read, unsigned char *written);
|
|
|
|
static inline void start_timing(void)
|
|
{
|
|
do_gettimeofday(&start);
|
|
}
|
|
|
|
static inline void stop_timing(void)
|
|
{
|
|
do_gettimeofday(&finish);
|
|
}
|
|
|
|
/*
|
|
* Erase eraseblock number @ebnum.
|
|
*/
|
|
static inline int erase_eraseblock(int ebnum)
|
|
{
|
|
int err;
|
|
struct erase_info ei;
|
|
loff_t addr = ebnum * mtd->erasesize;
|
|
|
|
memset(&ei, 0, sizeof(struct erase_info));
|
|
ei.mtd = mtd;
|
|
ei.addr = addr;
|
|
ei.len = mtd->erasesize;
|
|
|
|
err = mtd_erase(mtd, &ei);
|
|
if (err) {
|
|
printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
|
|
return err;
|
|
}
|
|
|
|
if (ei.state == MTD_ERASE_FAILED) {
|
|
printk(PRINT_PREF "some erase error occurred at EB %d\n",
|
|
ebnum);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check that the contents of eraseblock number @enbum is equivalent to the
|
|
* @buf buffer.
|
|
*/
|
|
static inline int check_eraseblock(int ebnum, unsigned char *buf)
|
|
{
|
|
int err, retries = 0;
|
|
size_t read;
|
|
loff_t addr = ebnum * mtd->erasesize;
|
|
size_t len = mtd->erasesize;
|
|
|
|
if (pgcnt) {
|
|
addr = (ebnum + 1) * mtd->erasesize - pgcnt * pgsize;
|
|
len = pgcnt * pgsize;
|
|
}
|
|
|
|
retry:
|
|
err = mtd_read(mtd, addr, len, &read, check_buf);
|
|
if (mtd_is_bitflip(err))
|
|
printk(PRINT_PREF "single bit flip occurred at EB %d "
|
|
"MTD reported that it was fixed.\n", ebnum);
|
|
else if (err) {
|
|
printk(PRINT_PREF "error %d while reading EB %d, "
|
|
"read %zd\n", err, ebnum, read);
|
|
return err;
|
|
}
|
|
|
|
if (read != len) {
|
|
printk(PRINT_PREF "failed to read %zd bytes from EB %d, "
|
|
"read only %zd, but no error reported\n",
|
|
len, ebnum, read);
|
|
return -EIO;
|
|
}
|
|
|
|
if (memcmp(buf, check_buf, len)) {
|
|
printk(PRINT_PREF "read wrong data from EB %d\n", ebnum);
|
|
report_corrupt(check_buf, buf);
|
|
|
|
if (retries++ < RETRIES) {
|
|
/* Try read again */
|
|
yield();
|
|
printk(PRINT_PREF "re-try reading data from EB %d\n",
|
|
ebnum);
|
|
goto retry;
|
|
} else {
|
|
printk(PRINT_PREF "retried %d times, still errors, "
|
|
"give-up\n", RETRIES);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (retries != 0)
|
|
printk(PRINT_PREF "only attempt number %d was OK (!!!)\n",
|
|
retries);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int write_pattern(int ebnum, void *buf)
|
|
{
|
|
int err;
|
|
size_t written;
|
|
loff_t addr = ebnum * mtd->erasesize;
|
|
size_t len = mtd->erasesize;
|
|
|
|
if (pgcnt) {
|
|
addr = (ebnum + 1) * mtd->erasesize - pgcnt * pgsize;
|
|
len = pgcnt * pgsize;
|
|
}
|
|
err = mtd_write(mtd, addr, len, &written, buf);
|
|
if (err) {
|
|
printk(PRINT_PREF "error %d while writing EB %d, written %zd"
|
|
" bytes\n", err, ebnum, written);
|
|
return err;
|
|
}
|
|
if (written != len) {
|
|
printk(PRINT_PREF "written only %zd bytes of %zd, but no error"
|
|
" reported\n", written, len);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init tort_init(void)
|
|
{
|
|
int err = 0, i, infinite = !cycles_count;
|
|
int bad_ebs[ebcnt];
|
|
|
|
printk(KERN_INFO "\n");
|
|
printk(KERN_INFO "=================================================\n");
|
|
printk(PRINT_PREF "Warning: this program is trying to wear out your "
|
|
"flash, stop it if this is not wanted.\n");
|
|
|
|
if (dev < 0) {
|
|
printk(PRINT_PREF "Please specify a valid mtd-device via module paramter\n");
|
|
printk(KERN_CRIT "CAREFUL: This test wipes all data on the specified MTD device!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
printk(PRINT_PREF "MTD device: %d\n", dev);
|
|
printk(PRINT_PREF "torture %d eraseblocks (%d-%d) of mtd%d\n",
|
|
ebcnt, eb, eb + ebcnt - 1, dev);
|
|
if (pgcnt)
|
|
printk(PRINT_PREF "torturing just %d pages per eraseblock\n",
|
|
pgcnt);
|
|
printk(PRINT_PREF "write verify %s\n", check ? "enabled" : "disabled");
|
|
|
|
mtd = get_mtd_device(NULL, dev);
|
|
if (IS_ERR(mtd)) {
|
|
err = PTR_ERR(mtd);
|
|
printk(PRINT_PREF "error: cannot get MTD device\n");
|
|
return err;
|
|
}
|
|
|
|
if (mtd->writesize == 1) {
|
|
printk(PRINT_PREF "not NAND flash, assume page size is 512 "
|
|
"bytes.\n");
|
|
pgsize = 512;
|
|
} else
|
|
pgsize = mtd->writesize;
|
|
|
|
if (pgcnt && (pgcnt > mtd->erasesize / pgsize || pgcnt < 0)) {
|
|
printk(PRINT_PREF "error: invalid pgcnt value %d\n", pgcnt);
|
|
goto out_mtd;
|
|
}
|
|
|
|
err = -ENOMEM;
|
|
patt_5A5 = kmalloc(mtd->erasesize, GFP_KERNEL);
|
|
if (!patt_5A5) {
|
|
printk(PRINT_PREF "error: cannot allocate memory\n");
|
|
goto out_mtd;
|
|
}
|
|
|
|
patt_A5A = kmalloc(mtd->erasesize, GFP_KERNEL);
|
|
if (!patt_A5A) {
|
|
printk(PRINT_PREF "error: cannot allocate memory\n");
|
|
goto out_patt_5A5;
|
|
}
|
|
|
|
patt_FF = kmalloc(mtd->erasesize, GFP_KERNEL);
|
|
if (!patt_FF) {
|
|
printk(PRINT_PREF "error: cannot allocate memory\n");
|
|
goto out_patt_A5A;
|
|
}
|
|
|
|
check_buf = kmalloc(mtd->erasesize, GFP_KERNEL);
|
|
if (!check_buf) {
|
|
printk(PRINT_PREF "error: cannot allocate memory\n");
|
|
goto out_patt_FF;
|
|
}
|
|
|
|
err = 0;
|
|
|
|
/* Initialize patterns */
|
|
memset(patt_FF, 0xFF, mtd->erasesize);
|
|
for (i = 0; i < mtd->erasesize / pgsize; i++) {
|
|
if (!(i & 1)) {
|
|
memset(patt_5A5 + i * pgsize, 0x55, pgsize);
|
|
memset(patt_A5A + i * pgsize, 0xAA, pgsize);
|
|
} else {
|
|
memset(patt_5A5 + i * pgsize, 0xAA, pgsize);
|
|
memset(patt_A5A + i * pgsize, 0x55, pgsize);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check if there is a bad eraseblock among those we are going to test.
|
|
*/
|
|
memset(&bad_ebs[0], 0, sizeof(int) * ebcnt);
|
|
if (mtd_can_have_bb(mtd)) {
|
|
for (i = eb; i < eb + ebcnt; i++) {
|
|
err = mtd_block_isbad(mtd, (loff_t)i * mtd->erasesize);
|
|
|
|
if (err < 0) {
|
|
printk(PRINT_PREF "block_isbad() returned %d "
|
|
"for EB %d\n", err, i);
|
|
goto out;
|
|
}
|
|
|
|
if (err) {
|
|
printk("EB %d is bad. Skip it.\n", i);
|
|
bad_ebs[i - eb] = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
start_timing();
|
|
while (1) {
|
|
int i;
|
|
void *patt;
|
|
|
|
/* Erase all eraseblocks */
|
|
for (i = eb; i < eb + ebcnt; i++) {
|
|
if (bad_ebs[i - eb])
|
|
continue;
|
|
err = erase_eraseblock(i);
|
|
if (err)
|
|
goto out;
|
|
cond_resched();
|
|
}
|
|
|
|
/* Check if the eraseblocks contain only 0xFF bytes */
|
|
if (check) {
|
|
for (i = eb; i < eb + ebcnt; i++) {
|
|
if (bad_ebs[i - eb])
|
|
continue;
|
|
err = check_eraseblock(i, patt_FF);
|
|
if (err) {
|
|
printk(PRINT_PREF "verify failed"
|
|
" for 0xFF... pattern\n");
|
|
goto out;
|
|
}
|
|
cond_resched();
|
|
}
|
|
}
|
|
|
|
/* Write the pattern */
|
|
for (i = eb; i < eb + ebcnt; i++) {
|
|
if (bad_ebs[i - eb])
|
|
continue;
|
|
if ((eb + erase_cycles) & 1)
|
|
patt = patt_5A5;
|
|
else
|
|
patt = patt_A5A;
|
|
err = write_pattern(i, patt);
|
|
if (err)
|
|
goto out;
|
|
cond_resched();
|
|
}
|
|
|
|
/* Verify what we wrote */
|
|
if (check) {
|
|
for (i = eb; i < eb + ebcnt; i++) {
|
|
if (bad_ebs[i - eb])
|
|
continue;
|
|
if ((eb + erase_cycles) & 1)
|
|
patt = patt_5A5;
|
|
else
|
|
patt = patt_A5A;
|
|
err = check_eraseblock(i, patt);
|
|
if (err) {
|
|
printk(PRINT_PREF "verify failed for %s"
|
|
" pattern\n",
|
|
((eb + erase_cycles) & 1) ?
|
|
"0x55AA55..." : "0xAA55AA...");
|
|
goto out;
|
|
}
|
|
cond_resched();
|
|
}
|
|
}
|
|
|
|
erase_cycles += 1;
|
|
|
|
if (erase_cycles % gran == 0) {
|
|
long ms;
|
|
|
|
stop_timing();
|
|
ms = (finish.tv_sec - start.tv_sec) * 1000 +
|
|
(finish.tv_usec - start.tv_usec) / 1000;
|
|
printk(PRINT_PREF "%08u erase cycles done, took %lu "
|
|
"milliseconds (%lu seconds)\n",
|
|
erase_cycles, ms, ms / 1000);
|
|
start_timing();
|
|
}
|
|
|
|
if (!infinite && --cycles_count == 0)
|
|
break;
|
|
}
|
|
out:
|
|
|
|
printk(PRINT_PREF "finished after %u erase cycles\n",
|
|
erase_cycles);
|
|
kfree(check_buf);
|
|
out_patt_FF:
|
|
kfree(patt_FF);
|
|
out_patt_A5A:
|
|
kfree(patt_A5A);
|
|
out_patt_5A5:
|
|
kfree(patt_5A5);
|
|
out_mtd:
|
|
put_mtd_device(mtd);
|
|
if (err)
|
|
printk(PRINT_PREF "error %d occurred during torturing\n", err);
|
|
printk(KERN_INFO "=================================================\n");
|
|
return err;
|
|
}
|
|
module_init(tort_init);
|
|
|
|
static void __exit tort_exit(void)
|
|
{
|
|
return;
|
|
}
|
|
module_exit(tort_exit);
|
|
|
|
static int countdiffs(unsigned char *buf, unsigned char *check_buf,
|
|
unsigned offset, unsigned len, unsigned *bytesp,
|
|
unsigned *bitsp);
|
|
static void print_bufs(unsigned char *read, unsigned char *written, int start,
|
|
int len);
|
|
|
|
/*
|
|
* Report the detailed information about how the read EB differs from what was
|
|
* written.
|
|
*/
|
|
static void report_corrupt(unsigned char *read, unsigned char *written)
|
|
{
|
|
int i;
|
|
int bytes, bits, pages, first;
|
|
int offset, len;
|
|
size_t check_len = mtd->erasesize;
|
|
|
|
if (pgcnt)
|
|
check_len = pgcnt * pgsize;
|
|
|
|
bytes = bits = pages = 0;
|
|
for (i = 0; i < check_len; i += pgsize)
|
|
if (countdiffs(written, read, i, pgsize, &bytes,
|
|
&bits) >= 0)
|
|
pages++;
|
|
|
|
printk(PRINT_PREF "verify fails on %d pages, %d bytes/%d bits\n",
|
|
pages, bytes, bits);
|
|
printk(PRINT_PREF "The following is a list of all differences between"
|
|
" what was read from flash and what was expected\n");
|
|
|
|
for (i = 0; i < check_len; i += pgsize) {
|
|
cond_resched();
|
|
bytes = bits = 0;
|
|
first = countdiffs(written, read, i, pgsize, &bytes,
|
|
&bits);
|
|
if (first < 0)
|
|
continue;
|
|
|
|
printk("-------------------------------------------------------"
|
|
"----------------------------------\n");
|
|
|
|
printk(PRINT_PREF "Page %zd has %d bytes/%d bits failing verify,"
|
|
" starting at offset 0x%x\n",
|
|
(mtd->erasesize - check_len + i) / pgsize,
|
|
bytes, bits, first);
|
|
|
|
offset = first & ~0x7;
|
|
len = ((first + bytes) | 0x7) + 1 - offset;
|
|
|
|
print_bufs(read, written, offset, len);
|
|
}
|
|
}
|
|
|
|
static void print_bufs(unsigned char *read, unsigned char *written, int start,
|
|
int len)
|
|
{
|
|
int i = 0, j1, j2;
|
|
char *diff;
|
|
|
|
printk("Offset Read Written\n");
|
|
while (i < len) {
|
|
printk("0x%08x: ", start + i);
|
|
diff = " ";
|
|
for (j1 = 0; j1 < 8 && i + j1 < len; j1++) {
|
|
printk(" %02x", read[start + i + j1]);
|
|
if (read[start + i + j1] != written[start + i + j1])
|
|
diff = "***";
|
|
}
|
|
|
|
while (j1 < 8) {
|
|
printk(" ");
|
|
j1 += 1;
|
|
}
|
|
|
|
printk(" %s ", diff);
|
|
|
|
for (j2 = 0; j2 < 8 && i + j2 < len; j2++)
|
|
printk(" %02x", written[start + i + j2]);
|
|
printk("\n");
|
|
i += 8;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Count the number of differing bytes and bits and return the first differing
|
|
* offset.
|
|
*/
|
|
static int countdiffs(unsigned char *buf, unsigned char *check_buf,
|
|
unsigned offset, unsigned len, unsigned *bytesp,
|
|
unsigned *bitsp)
|
|
{
|
|
unsigned i, bit;
|
|
int first = -1;
|
|
|
|
for (i = offset; i < offset + len; i++)
|
|
if (buf[i] != check_buf[i]) {
|
|
first = i;
|
|
break;
|
|
}
|
|
|
|
while (i < offset + len) {
|
|
if (buf[i] != check_buf[i]) {
|
|
(*bytesp)++;
|
|
bit = 1;
|
|
while (bit < 256) {
|
|
if ((buf[i] & bit) != (check_buf[i] & bit))
|
|
(*bitsp)++;
|
|
bit <<= 1;
|
|
}
|
|
}
|
|
i++;
|
|
}
|
|
|
|
return first;
|
|
}
|
|
|
|
MODULE_DESCRIPTION("Eraseblock torturing module");
|
|
MODULE_AUTHOR("Artem Bityutskiy, Jarkko Lavinen, Adrian Hunter");
|
|
MODULE_LICENSE("GPL");
|