462 lines
10 KiB
C
462 lines
10 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2006-2008 Nokia Corporation
|
||
|
|
*
|
||
|
|
* Test page read and write on MTD device.
|
||
|
|
*
|
||
|
|
* Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
||
|
|
|
||
|
|
#include <asm/div64.h>
|
||
|
|
#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>
|
||
|
|
#include <linux/random.h>
|
||
|
|
|
||
|
|
#include "mtd_test.h"
|
||
|
|
|
||
|
|
static int dev = -EINVAL;
|
||
|
|
module_param(dev, int, S_IRUGO);
|
||
|
|
MODULE_PARM_DESC(dev, "MTD device number to use");
|
||
|
|
|
||
|
|
static struct mtd_info *mtd;
|
||
|
|
static unsigned char *twopages;
|
||
|
|
static unsigned char *writebuf;
|
||
|
|
static unsigned char *boundary;
|
||
|
|
static unsigned char *bbt;
|
||
|
|
|
||
|
|
static int pgsize;
|
||
|
|
static int bufsize;
|
||
|
|
static int ebcnt;
|
||
|
|
static int pgcnt;
|
||
|
|
static int errcnt;
|
||
|
|
static struct rnd_state rnd_state;
|
||
|
|
|
||
|
|
static int write_eraseblock(int ebnum)
|
||
|
|
{
|
||
|
|
loff_t addr = (loff_t)ebnum * mtd->erasesize;
|
||
|
|
|
||
|
|
prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize);
|
||
|
|
cond_resched();
|
||
|
|
return mtdtest_write(mtd, addr, mtd->erasesize, writebuf);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int verify_eraseblock(int ebnum)
|
||
|
|
{
|
||
|
|
uint32_t j;
|
||
|
|
int err = 0, i;
|
||
|
|
loff_t addr0, addrn;
|
||
|
|
loff_t addr = (loff_t)ebnum * mtd->erasesize;
|
||
|
|
|
||
|
|
addr0 = 0;
|
||
|
|
for (i = 0; i < ebcnt && bbt[i]; ++i)
|
||
|
|
addr0 += mtd->erasesize;
|
||
|
|
|
||
|
|
addrn = mtd->size;
|
||
|
|
for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i)
|
||
|
|
addrn -= mtd->erasesize;
|
||
|
|
|
||
|
|
prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize);
|
||
|
|
for (j = 0; j < pgcnt - 1; ++j, addr += pgsize) {
|
||
|
|
/* Do a read to set the internal dataRAMs to different data */
|
||
|
|
err = mtdtest_read(mtd, addr0, bufsize, twopages);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
err = mtdtest_read(mtd, addrn - bufsize, bufsize, twopages);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
memset(twopages, 0, bufsize);
|
||
|
|
err = mtdtest_read(mtd, addr, bufsize, twopages);
|
||
|
|
if (err)
|
||
|
|
break;
|
||
|
|
if (memcmp(twopages, writebuf + (j * pgsize), bufsize)) {
|
||
|
|
pr_err("error: verify failed at %#llx\n",
|
||
|
|
(long long)addr);
|
||
|
|
errcnt += 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/* Check boundary between eraseblocks */
|
||
|
|
if (addr <= addrn - pgsize - pgsize && !bbt[ebnum + 1]) {
|
||
|
|
struct rnd_state old_state = rnd_state;
|
||
|
|
|
||
|
|
/* Do a read to set the internal dataRAMs to different data */
|
||
|
|
err = mtdtest_read(mtd, addr0, bufsize, twopages);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
err = mtdtest_read(mtd, addrn - bufsize, bufsize, twopages);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
memset(twopages, 0, bufsize);
|
||
|
|
err = mtdtest_read(mtd, addr, bufsize, twopages);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
memcpy(boundary, writebuf + mtd->erasesize - pgsize, pgsize);
|
||
|
|
prandom_bytes_state(&rnd_state, boundary + pgsize, pgsize);
|
||
|
|
if (memcmp(twopages, boundary, bufsize)) {
|
||
|
|
pr_err("error: verify failed at %#llx\n",
|
||
|
|
(long long)addr);
|
||
|
|
errcnt += 1;
|
||
|
|
}
|
||
|
|
rnd_state = old_state;
|
||
|
|
}
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int crosstest(void)
|
||
|
|
{
|
||
|
|
int err = 0, i;
|
||
|
|
loff_t addr, addr0, addrn;
|
||
|
|
unsigned char *pp1, *pp2, *pp3, *pp4;
|
||
|
|
|
||
|
|
pr_info("crosstest\n");
|
||
|
|
pp1 = kcalloc(pgsize, 4, GFP_KERNEL);
|
||
|
|
if (!pp1)
|
||
|
|
return -ENOMEM;
|
||
|
|
pp2 = pp1 + pgsize;
|
||
|
|
pp3 = pp2 + pgsize;
|
||
|
|
pp4 = pp3 + pgsize;
|
||
|
|
|
||
|
|
addr0 = 0;
|
||
|
|
for (i = 0; i < ebcnt && bbt[i]; ++i)
|
||
|
|
addr0 += mtd->erasesize;
|
||
|
|
|
||
|
|
addrn = mtd->size;
|
||
|
|
for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i)
|
||
|
|
addrn -= mtd->erasesize;
|
||
|
|
|
||
|
|
/* Read 2nd-to-last page to pp1 */
|
||
|
|
addr = addrn - pgsize - pgsize;
|
||
|
|
err = mtdtest_read(mtd, addr, pgsize, pp1);
|
||
|
|
if (err) {
|
||
|
|
kfree(pp1);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Read 3rd-to-last page to pp1 */
|
||
|
|
addr = addrn - pgsize - pgsize - pgsize;
|
||
|
|
err = mtdtest_read(mtd, addr, pgsize, pp1);
|
||
|
|
if (err) {
|
||
|
|
kfree(pp1);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Read first page to pp2 */
|
||
|
|
addr = addr0;
|
||
|
|
pr_info("reading page at %#llx\n", (long long)addr);
|
||
|
|
err = mtdtest_read(mtd, addr, pgsize, pp2);
|
||
|
|
if (err) {
|
||
|
|
kfree(pp1);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Read last page to pp3 */
|
||
|
|
addr = addrn - pgsize;
|
||
|
|
pr_info("reading page at %#llx\n", (long long)addr);
|
||
|
|
err = mtdtest_read(mtd, addr, pgsize, pp3);
|
||
|
|
if (err) {
|
||
|
|
kfree(pp1);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Read first page again to pp4 */
|
||
|
|
addr = addr0;
|
||
|
|
pr_info("reading page at %#llx\n", (long long)addr);
|
||
|
|
err = mtdtest_read(mtd, addr, pgsize, pp4);
|
||
|
|
if (err) {
|
||
|
|
kfree(pp1);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* pp2 and pp4 should be the same */
|
||
|
|
pr_info("verifying pages read at %#llx match\n",
|
||
|
|
(long long)addr0);
|
||
|
|
if (memcmp(pp2, pp4, pgsize)) {
|
||
|
|
pr_err("verify failed!\n");
|
||
|
|
errcnt += 1;
|
||
|
|
} else if (!err)
|
||
|
|
pr_info("crosstest ok\n");
|
||
|
|
kfree(pp1);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int erasecrosstest(void)
|
||
|
|
{
|
||
|
|
int err = 0, i, ebnum, ebnum2;
|
||
|
|
loff_t addr0;
|
||
|
|
char *readbuf = twopages;
|
||
|
|
|
||
|
|
pr_info("erasecrosstest\n");
|
||
|
|
|
||
|
|
ebnum = 0;
|
||
|
|
addr0 = 0;
|
||
|
|
for (i = 0; i < ebcnt && bbt[i]; ++i) {
|
||
|
|
addr0 += mtd->erasesize;
|
||
|
|
ebnum += 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
ebnum2 = ebcnt - 1;
|
||
|
|
while (ebnum2 && bbt[ebnum2])
|
||
|
|
ebnum2 -= 1;
|
||
|
|
|
||
|
|
pr_info("erasing block %d\n", ebnum);
|
||
|
|
err = mtdtest_erase_eraseblock(mtd, ebnum);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
pr_info("writing 1st page of block %d\n", ebnum);
|
||
|
|
prandom_bytes_state(&rnd_state, writebuf, pgsize);
|
||
|
|
strcpy(writebuf, "There is no data like this!");
|
||
|
|
err = mtdtest_write(mtd, addr0, pgsize, writebuf);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
pr_info("reading 1st page of block %d\n", ebnum);
|
||
|
|
memset(readbuf, 0, pgsize);
|
||
|
|
err = mtdtest_read(mtd, addr0, pgsize, readbuf);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
pr_info("verifying 1st page of block %d\n", ebnum);
|
||
|
|
if (memcmp(writebuf, readbuf, pgsize)) {
|
||
|
|
pr_err("verify failed!\n");
|
||
|
|
errcnt += 1;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
pr_info("erasing block %d\n", ebnum);
|
||
|
|
err = mtdtest_erase_eraseblock(mtd, ebnum);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
pr_info("writing 1st page of block %d\n", ebnum);
|
||
|
|
prandom_bytes_state(&rnd_state, writebuf, pgsize);
|
||
|
|
strcpy(writebuf, "There is no data like this!");
|
||
|
|
err = mtdtest_write(mtd, addr0, pgsize, writebuf);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
pr_info("erasing block %d\n", ebnum2);
|
||
|
|
err = mtdtest_erase_eraseblock(mtd, ebnum2);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
pr_info("reading 1st page of block %d\n", ebnum);
|
||
|
|
memset(readbuf, 0, pgsize);
|
||
|
|
err = mtdtest_read(mtd, addr0, pgsize, readbuf);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
pr_info("verifying 1st page of block %d\n", ebnum);
|
||
|
|
if (memcmp(writebuf, readbuf, pgsize)) {
|
||
|
|
pr_err("verify failed!\n");
|
||
|
|
errcnt += 1;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!err)
|
||
|
|
pr_info("erasecrosstest ok\n");
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int erasetest(void)
|
||
|
|
{
|
||
|
|
int err = 0, i, ebnum, ok = 1;
|
||
|
|
loff_t addr0;
|
||
|
|
|
||
|
|
pr_info("erasetest\n");
|
||
|
|
|
||
|
|
ebnum = 0;
|
||
|
|
addr0 = 0;
|
||
|
|
for (i = 0; i < ebcnt && bbt[i]; ++i) {
|
||
|
|
addr0 += mtd->erasesize;
|
||
|
|
ebnum += 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
pr_info("erasing block %d\n", ebnum);
|
||
|
|
err = mtdtest_erase_eraseblock(mtd, ebnum);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
pr_info("writing 1st page of block %d\n", ebnum);
|
||
|
|
prandom_bytes_state(&rnd_state, writebuf, pgsize);
|
||
|
|
err = mtdtest_write(mtd, addr0, pgsize, writebuf);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
pr_info("erasing block %d\n", ebnum);
|
||
|
|
err = mtdtest_erase_eraseblock(mtd, ebnum);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
pr_info("reading 1st page of block %d\n", ebnum);
|
||
|
|
err = mtdtest_read(mtd, addr0, pgsize, twopages);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
pr_info("verifying 1st page of block %d is all 0xff\n",
|
||
|
|
ebnum);
|
||
|
|
for (i = 0; i < pgsize; ++i)
|
||
|
|
if (twopages[i] != 0xff) {
|
||
|
|
pr_err("verifying all 0xff failed at %d\n",
|
||
|
|
i);
|
||
|
|
errcnt += 1;
|
||
|
|
ok = 0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ok && !err)
|
||
|
|
pr_info("erasetest ok\n");
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __init mtd_pagetest_init(void)
|
||
|
|
{
|
||
|
|
int err = 0;
|
||
|
|
uint64_t tmp;
|
||
|
|
uint32_t i;
|
||
|
|
|
||
|
|
printk(KERN_INFO "\n");
|
||
|
|
printk(KERN_INFO "=================================================\n");
|
||
|
|
|
||
|
|
if (dev < 0) {
|
||
|
|
pr_info("Please specify a valid mtd-device via module parameter\n");
|
||
|
|
pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
pr_info("MTD device: %d\n", dev);
|
||
|
|
|
||
|
|
mtd = get_mtd_device(NULL, dev);
|
||
|
|
if (IS_ERR(mtd)) {
|
||
|
|
err = PTR_ERR(mtd);
|
||
|
|
pr_err("error: cannot get MTD device\n");
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!mtd_type_is_nand(mtd)) {
|
||
|
|
pr_info("this test requires NAND flash\n");
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
tmp = mtd->size;
|
||
|
|
do_div(tmp, mtd->erasesize);
|
||
|
|
ebcnt = tmp;
|
||
|
|
pgcnt = mtd->erasesize / mtd->writesize;
|
||
|
|
pgsize = mtd->writesize;
|
||
|
|
|
||
|
|
pr_info("MTD device size %llu, eraseblock size %u, "
|
||
|
|
"page size %u, count of eraseblocks %u, pages per "
|
||
|
|
"eraseblock %u, OOB size %u\n",
|
||
|
|
(unsigned long long)mtd->size, mtd->erasesize,
|
||
|
|
pgsize, ebcnt, pgcnt, mtd->oobsize);
|
||
|
|
|
||
|
|
err = -ENOMEM;
|
||
|
|
bufsize = pgsize * 2;
|
||
|
|
writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);
|
||
|
|
if (!writebuf)
|
||
|
|
goto out;
|
||
|
|
twopages = kmalloc(bufsize, GFP_KERNEL);
|
||
|
|
if (!twopages)
|
||
|
|
goto out;
|
||
|
|
boundary = kmalloc(bufsize, GFP_KERNEL);
|
||
|
|
if (!boundary)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
bbt = kzalloc(ebcnt, GFP_KERNEL);
|
||
|
|
if (!bbt)
|
||
|
|
goto out;
|
||
|
|
err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt);
|
||
|
|
if (err)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
/* Erase all eraseblocks */
|
||
|
|
pr_info("erasing whole device\n");
|
||
|
|
err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
|
||
|
|
if (err)
|
||
|
|
goto out;
|
||
|
|
pr_info("erased %u eraseblocks\n", ebcnt);
|
||
|
|
|
||
|
|
/* Write all eraseblocks */
|
||
|
|
prandom_seed_state(&rnd_state, 1);
|
||
|
|
pr_info("writing whole device\n");
|
||
|
|
for (i = 0; i < ebcnt; ++i) {
|
||
|
|
if (bbt[i])
|
||
|
|
continue;
|
||
|
|
err = write_eraseblock(i);
|
||
|
|
if (err)
|
||
|
|
goto out;
|
||
|
|
if (i % 256 == 0)
|
||
|
|
pr_info("written up to eraseblock %u\n", i);
|
||
|
|
|
||
|
|
err = mtdtest_relax();
|
||
|
|
if (err)
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
pr_info("written %u eraseblocks\n", i);
|
||
|
|
|
||
|
|
/* Check all eraseblocks */
|
||
|
|
prandom_seed_state(&rnd_state, 1);
|
||
|
|
pr_info("verifying all eraseblocks\n");
|
||
|
|
for (i = 0; i < ebcnt; ++i) {
|
||
|
|
if (bbt[i])
|
||
|
|
continue;
|
||
|
|
err = verify_eraseblock(i);
|
||
|
|
if (err)
|
||
|
|
goto out;
|
||
|
|
if (i % 256 == 0)
|
||
|
|
pr_info("verified up to eraseblock %u\n", i);
|
||
|
|
|
||
|
|
err = mtdtest_relax();
|
||
|
|
if (err)
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
pr_info("verified %u eraseblocks\n", i);
|
||
|
|
|
||
|
|
err = crosstest();
|
||
|
|
if (err)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
if (ebcnt > 1) {
|
||
|
|
err = erasecrosstest();
|
||
|
|
if (err)
|
||
|
|
goto out;
|
||
|
|
} else {
|
||
|
|
pr_info("skipping erasecrosstest, 2 erase blocks needed\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
err = erasetest();
|
||
|
|
if (err)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
pr_info("finished with %d errors\n", errcnt);
|
||
|
|
out:
|
||
|
|
|
||
|
|
kfree(bbt);
|
||
|
|
kfree(boundary);
|
||
|
|
kfree(twopages);
|
||
|
|
kfree(writebuf);
|
||
|
|
put_mtd_device(mtd);
|
||
|
|
if (err)
|
||
|
|
pr_info("error %d occurred\n", err);
|
||
|
|
printk(KERN_INFO "=================================================\n");
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
module_init(mtd_pagetest_init);
|
||
|
|
|
||
|
|
static void __exit mtd_pagetest_exit(void)
|
||
|
|
{
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
module_exit(mtd_pagetest_exit);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("NAND page test");
|
||
|
|
MODULE_AUTHOR("Adrian Hunter");
|
||
|
|
MODULE_LICENSE("GPL");
|