mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
733 lines
17 KiB
733 lines
17 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Copyright (C) 2006-2008 Nokia Corporation |
|
* |
|
* Test OOB read and write on MTD device. |
|
* |
|
* Author: Adrian Hunter <[email protected]> |
|
*/ |
|
|
|
#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; |
|
static int bitflip_limit; |
|
module_param(dev, int, S_IRUGO); |
|
MODULE_PARM_DESC(dev, "MTD device number to use"); |
|
module_param(bitflip_limit, int, S_IRUGO); |
|
MODULE_PARM_DESC(bitflip_limit, "Max. allowed bitflips per page"); |
|
|
|
static struct mtd_info *mtd; |
|
static unsigned char *readbuf; |
|
static unsigned char *writebuf; |
|
static unsigned char *bbt; |
|
|
|
static int ebcnt; |
|
static int pgcnt; |
|
static int errcnt; |
|
static int use_offset; |
|
static int use_len; |
|
static int use_len_max; |
|
static int vary_offset; |
|
static struct rnd_state rnd_state; |
|
|
|
static void do_vary_offset(void) |
|
{ |
|
use_len -= 1; |
|
if (use_len < 1) { |
|
use_offset += 1; |
|
if (use_offset >= use_len_max) |
|
use_offset = 0; |
|
use_len = use_len_max - use_offset; |
|
} |
|
} |
|
|
|
static int write_eraseblock(int ebnum) |
|
{ |
|
int i; |
|
struct mtd_oob_ops ops; |
|
int err = 0; |
|
loff_t addr = (loff_t)ebnum * mtd->erasesize; |
|
|
|
prandom_bytes_state(&rnd_state, writebuf, use_len_max * pgcnt); |
|
for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) { |
|
ops.mode = MTD_OPS_AUTO_OOB; |
|
ops.len = 0; |
|
ops.retlen = 0; |
|
ops.ooblen = use_len; |
|
ops.oobretlen = 0; |
|
ops.ooboffs = use_offset; |
|
ops.datbuf = NULL; |
|
ops.oobbuf = writebuf + (use_len_max * i) + use_offset; |
|
err = mtd_write_oob(mtd, addr, &ops); |
|
if (err || ops.oobretlen != use_len) { |
|
pr_err("error: writeoob failed at %#llx\n", |
|
(long long)addr); |
|
pr_err("error: use_len %d, use_offset %d\n", |
|
use_len, use_offset); |
|
errcnt += 1; |
|
return err ? err : -1; |
|
} |
|
if (vary_offset) |
|
do_vary_offset(); |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static int write_whole_device(void) |
|
{ |
|
int err; |
|
unsigned int i; |
|
|
|
pr_info("writing OOBs of whole device\n"); |
|
for (i = 0; i < ebcnt; ++i) { |
|
if (bbt[i]) |
|
continue; |
|
err = write_eraseblock(i); |
|
if (err) |
|
return err; |
|
if (i % 256 == 0) |
|
pr_info("written up to eraseblock %u\n", i); |
|
|
|
err = mtdtest_relax(); |
|
if (err) |
|
return err; |
|
} |
|
pr_info("written %u eraseblocks\n", i); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Display the address, offset and data bytes at comparison failure. |
|
* Return number of bitflips encountered. |
|
*/ |
|
static size_t memcmpshowoffset(loff_t addr, loff_t offset, const void *cs, |
|
const void *ct, size_t count) |
|
{ |
|
const unsigned char *su1, *su2; |
|
int res; |
|
size_t i = 0; |
|
size_t bitflips = 0; |
|
|
|
for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--, i++) { |
|
res = *su1 ^ *su2; |
|
if (res) { |
|
pr_info("error @addr[0x%lx:0x%lx] 0x%x -> 0x%x diff 0x%x\n", |
|
(unsigned long)addr, (unsigned long)offset + i, |
|
*su1, *su2, res); |
|
bitflips += hweight8(res); |
|
} |
|
} |
|
|
|
return bitflips; |
|
} |
|
|
|
#define memcmpshow(addr, cs, ct, count) memcmpshowoffset((addr), 0, (cs), (ct),\ |
|
(count)) |
|
|
|
/* |
|
* Compare with 0xff and show the address, offset and data bytes at |
|
* comparison failure. Return number of bitflips encountered. |
|
*/ |
|
static size_t memffshow(loff_t addr, loff_t offset, const void *cs, |
|
size_t count) |
|
{ |
|
const unsigned char *su1; |
|
int res; |
|
size_t i = 0; |
|
size_t bitflips = 0; |
|
|
|
for (su1 = cs; 0 < count; ++su1, count--, i++) { |
|
res = *su1 ^ 0xff; |
|
if (res) { |
|
pr_info("error @addr[0x%lx:0x%lx] 0x%x -> 0xff diff 0x%x\n", |
|
(unsigned long)addr, (unsigned long)offset + i, |
|
*su1, res); |
|
bitflips += hweight8(res); |
|
} |
|
} |
|
|
|
return bitflips; |
|
} |
|
|
|
static int verify_eraseblock(int ebnum) |
|
{ |
|
int i; |
|
struct mtd_oob_ops ops; |
|
int err = 0; |
|
loff_t addr = (loff_t)ebnum * mtd->erasesize; |
|
size_t bitflips; |
|
|
|
prandom_bytes_state(&rnd_state, writebuf, use_len_max * pgcnt); |
|
for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) { |
|
ops.mode = MTD_OPS_AUTO_OOB; |
|
ops.len = 0; |
|
ops.retlen = 0; |
|
ops.ooblen = use_len; |
|
ops.oobretlen = 0; |
|
ops.ooboffs = use_offset; |
|
ops.datbuf = NULL; |
|
ops.oobbuf = readbuf; |
|
err = mtd_read_oob(mtd, addr, &ops); |
|
if (mtd_is_bitflip(err)) |
|
err = 0; |
|
|
|
if (err || ops.oobretlen != use_len) { |
|
pr_err("error: readoob failed at %#llx\n", |
|
(long long)addr); |
|
errcnt += 1; |
|
return err ? err : -1; |
|
} |
|
|
|
bitflips = memcmpshow(addr, readbuf, |
|
writebuf + (use_len_max * i) + use_offset, |
|
use_len); |
|
if (bitflips > bitflip_limit) { |
|
pr_err("error: verify failed at %#llx\n", |
|
(long long)addr); |
|
errcnt += 1; |
|
if (errcnt > 1000) { |
|
pr_err("error: too many errors\n"); |
|
return -1; |
|
} |
|
} else if (bitflips) { |
|
pr_info("ignoring error as within bitflip_limit\n"); |
|
} |
|
|
|
if (use_offset != 0 || use_len < mtd->oobavail) { |
|
int k; |
|
|
|
ops.mode = MTD_OPS_AUTO_OOB; |
|
ops.len = 0; |
|
ops.retlen = 0; |
|
ops.ooblen = mtd->oobavail; |
|
ops.oobretlen = 0; |
|
ops.ooboffs = 0; |
|
ops.datbuf = NULL; |
|
ops.oobbuf = readbuf; |
|
err = mtd_read_oob(mtd, addr, &ops); |
|
if (mtd_is_bitflip(err)) |
|
err = 0; |
|
|
|
if (err || ops.oobretlen != mtd->oobavail) { |
|
pr_err("error: readoob failed at %#llx\n", |
|
(long long)addr); |
|
errcnt += 1; |
|
return err ? err : -1; |
|
} |
|
bitflips = memcmpshowoffset(addr, use_offset, |
|
readbuf + use_offset, |
|
writebuf + (use_len_max * i) + use_offset, |
|
use_len); |
|
|
|
/* verify pre-offset area for 0xff */ |
|
bitflips += memffshow(addr, 0, readbuf, use_offset); |
|
|
|
/* verify post-(use_offset + use_len) area for 0xff */ |
|
k = use_offset + use_len; |
|
bitflips += memffshow(addr, k, readbuf + k, |
|
mtd->oobavail - k); |
|
|
|
if (bitflips > bitflip_limit) { |
|
pr_err("error: verify failed at %#llx\n", |
|
(long long)addr); |
|
errcnt += 1; |
|
if (errcnt > 1000) { |
|
pr_err("error: too many errors\n"); |
|
return -1; |
|
} |
|
} else if (bitflips) { |
|
pr_info("ignoring errors as within bitflip limit\n"); |
|
} |
|
} |
|
if (vary_offset) |
|
do_vary_offset(); |
|
} |
|
return err; |
|
} |
|
|
|
static int verify_eraseblock_in_one_go(int ebnum) |
|
{ |
|
struct mtd_oob_ops ops; |
|
int err = 0; |
|
loff_t addr = (loff_t)ebnum * mtd->erasesize; |
|
size_t len = mtd->oobavail * pgcnt; |
|
size_t oobavail = mtd->oobavail; |
|
size_t bitflips; |
|
int i; |
|
|
|
prandom_bytes_state(&rnd_state, writebuf, len); |
|
ops.mode = MTD_OPS_AUTO_OOB; |
|
ops.len = 0; |
|
ops.retlen = 0; |
|
ops.ooblen = len; |
|
ops.oobretlen = 0; |
|
ops.ooboffs = 0; |
|
ops.datbuf = NULL; |
|
ops.oobbuf = readbuf; |
|
|
|
/* read entire block's OOB at one go */ |
|
err = mtd_read_oob(mtd, addr, &ops); |
|
if (mtd_is_bitflip(err)) |
|
err = 0; |
|
|
|
if (err || ops.oobretlen != len) { |
|
pr_err("error: readoob failed at %#llx\n", |
|
(long long)addr); |
|
errcnt += 1; |
|
return err ? err : -1; |
|
} |
|
|
|
/* verify one page OOB at a time for bitflip per page limit check */ |
|
for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) { |
|
bitflips = memcmpshow(addr, readbuf + (i * oobavail), |
|
writebuf + (i * oobavail), oobavail); |
|
if (bitflips > bitflip_limit) { |
|
pr_err("error: verify failed at %#llx\n", |
|
(long long)addr); |
|
errcnt += 1; |
|
if (errcnt > 1000) { |
|
pr_err("error: too many errors\n"); |
|
return -1; |
|
} |
|
} else if (bitflips) { |
|
pr_info("ignoring error as within bitflip_limit\n"); |
|
} |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static int verify_all_eraseblocks(void) |
|
{ |
|
int err; |
|
unsigned int i; |
|
|
|
pr_info("verifying all eraseblocks\n"); |
|
for (i = 0; i < ebcnt; ++i) { |
|
if (bbt[i]) |
|
continue; |
|
err = verify_eraseblock(i); |
|
if (err) |
|
return err; |
|
if (i % 256 == 0) |
|
pr_info("verified up to eraseblock %u\n", i); |
|
|
|
err = mtdtest_relax(); |
|
if (err) |
|
return err; |
|
} |
|
pr_info("verified %u eraseblocks\n", i); |
|
return 0; |
|
} |
|
|
|
static int __init mtd_oobtest_init(void) |
|
{ |
|
int err = 0; |
|
unsigned int i; |
|
uint64_t tmp; |
|
struct mtd_oob_ops ops; |
|
loff_t addr = 0, addr0; |
|
|
|
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; |
|
|
|
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, |
|
mtd->writesize, ebcnt, pgcnt, mtd->oobsize); |
|
|
|
err = -ENOMEM; |
|
readbuf = kmalloc(mtd->erasesize, GFP_KERNEL); |
|
if (!readbuf) |
|
goto out; |
|
writebuf = kmalloc(mtd->erasesize, GFP_KERNEL); |
|
if (!writebuf) |
|
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; |
|
|
|
use_offset = 0; |
|
use_len = mtd->oobavail; |
|
use_len_max = mtd->oobavail; |
|
vary_offset = 0; |
|
|
|
/* First test: write all OOB, read it back and verify */ |
|
pr_info("test 1 of 5\n"); |
|
|
|
err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); |
|
if (err) |
|
goto out; |
|
|
|
prandom_seed_state(&rnd_state, 1); |
|
err = write_whole_device(); |
|
if (err) |
|
goto out; |
|
|
|
prandom_seed_state(&rnd_state, 1); |
|
err = verify_all_eraseblocks(); |
|
if (err) |
|
goto out; |
|
|
|
/* |
|
* Second test: write all OOB, a block at a time, read it back and |
|
* verify. |
|
*/ |
|
pr_info("test 2 of 5\n"); |
|
|
|
err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); |
|
if (err) |
|
goto out; |
|
|
|
prandom_seed_state(&rnd_state, 3); |
|
err = write_whole_device(); |
|
if (err) |
|
goto out; |
|
|
|
/* Check all eraseblocks */ |
|
prandom_seed_state(&rnd_state, 3); |
|
pr_info("verifying all eraseblocks\n"); |
|
for (i = 0; i < ebcnt; ++i) { |
|
if (bbt[i]) |
|
continue; |
|
err = verify_eraseblock_in_one_go(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); |
|
|
|
/* |
|
* Third test: write OOB at varying offsets and lengths, read it back |
|
* and verify. |
|
*/ |
|
pr_info("test 3 of 5\n"); |
|
|
|
err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); |
|
if (err) |
|
goto out; |
|
|
|
/* Write all eraseblocks */ |
|
use_offset = 0; |
|
use_len = mtd->oobavail; |
|
use_len_max = mtd->oobavail; |
|
vary_offset = 1; |
|
prandom_seed_state(&rnd_state, 5); |
|
|
|
err = write_whole_device(); |
|
if (err) |
|
goto out; |
|
|
|
/* Check all eraseblocks */ |
|
use_offset = 0; |
|
use_len = mtd->oobavail; |
|
use_len_max = mtd->oobavail; |
|
vary_offset = 1; |
|
prandom_seed_state(&rnd_state, 5); |
|
err = verify_all_eraseblocks(); |
|
if (err) |
|
goto out; |
|
|
|
use_offset = 0; |
|
use_len = mtd->oobavail; |
|
use_len_max = mtd->oobavail; |
|
vary_offset = 0; |
|
|
|
/* Fourth test: try to write off end of device */ |
|
pr_info("test 4 of 5\n"); |
|
|
|
err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); |
|
if (err) |
|
goto out; |
|
|
|
addr0 = 0; |
|
for (i = 0; i < ebcnt && bbt[i]; ++i) |
|
addr0 += mtd->erasesize; |
|
|
|
/* Attempt to write off end of OOB */ |
|
ops.mode = MTD_OPS_AUTO_OOB; |
|
ops.len = 0; |
|
ops.retlen = 0; |
|
ops.ooblen = 1; |
|
ops.oobretlen = 0; |
|
ops.ooboffs = mtd->oobavail; |
|
ops.datbuf = NULL; |
|
ops.oobbuf = writebuf; |
|
pr_info("attempting to start write past end of OOB\n"); |
|
pr_info("an error is expected...\n"); |
|
err = mtd_write_oob(mtd, addr0, &ops); |
|
if (err) { |
|
pr_info("error occurred as expected\n"); |
|
} else { |
|
pr_err("error: can write past end of OOB\n"); |
|
errcnt += 1; |
|
} |
|
|
|
/* Attempt to read off end of OOB */ |
|
ops.mode = MTD_OPS_AUTO_OOB; |
|
ops.len = 0; |
|
ops.retlen = 0; |
|
ops.ooblen = 1; |
|
ops.oobretlen = 0; |
|
ops.ooboffs = mtd->oobavail; |
|
ops.datbuf = NULL; |
|
ops.oobbuf = readbuf; |
|
pr_info("attempting to start read past end of OOB\n"); |
|
pr_info("an error is expected...\n"); |
|
err = mtd_read_oob(mtd, addr0, &ops); |
|
if (mtd_is_bitflip(err)) |
|
err = 0; |
|
|
|
if (err) { |
|
pr_info("error occurred as expected\n"); |
|
} else { |
|
pr_err("error: can read past end of OOB\n"); |
|
errcnt += 1; |
|
} |
|
|
|
if (bbt[ebcnt - 1]) |
|
pr_info("skipping end of device tests because last " |
|
"block is bad\n"); |
|
else { |
|
/* Attempt to write off end of device */ |
|
ops.mode = MTD_OPS_AUTO_OOB; |
|
ops.len = 0; |
|
ops.retlen = 0; |
|
ops.ooblen = mtd->oobavail + 1; |
|
ops.oobretlen = 0; |
|
ops.ooboffs = 0; |
|
ops.datbuf = NULL; |
|
ops.oobbuf = writebuf; |
|
pr_info("attempting to write past end of device\n"); |
|
pr_info("an error is expected...\n"); |
|
err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops); |
|
if (err) { |
|
pr_info("error occurred as expected\n"); |
|
} else { |
|
pr_err("error: wrote past end of device\n"); |
|
errcnt += 1; |
|
} |
|
|
|
/* Attempt to read off end of device */ |
|
ops.mode = MTD_OPS_AUTO_OOB; |
|
ops.len = 0; |
|
ops.retlen = 0; |
|
ops.ooblen = mtd->oobavail + 1; |
|
ops.oobretlen = 0; |
|
ops.ooboffs = 0; |
|
ops.datbuf = NULL; |
|
ops.oobbuf = readbuf; |
|
pr_info("attempting to read past end of device\n"); |
|
pr_info("an error is expected...\n"); |
|
err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops); |
|
if (mtd_is_bitflip(err)) |
|
err = 0; |
|
|
|
if (err) { |
|
pr_info("error occurred as expected\n"); |
|
} else { |
|
pr_err("error: read past end of device\n"); |
|
errcnt += 1; |
|
} |
|
|
|
err = mtdtest_erase_eraseblock(mtd, ebcnt - 1); |
|
if (err) |
|
goto out; |
|
|
|
/* Attempt to write off end of device */ |
|
ops.mode = MTD_OPS_AUTO_OOB; |
|
ops.len = 0; |
|
ops.retlen = 0; |
|
ops.ooblen = mtd->oobavail; |
|
ops.oobretlen = 0; |
|
ops.ooboffs = 1; |
|
ops.datbuf = NULL; |
|
ops.oobbuf = writebuf; |
|
pr_info("attempting to write past end of device\n"); |
|
pr_info("an error is expected...\n"); |
|
err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops); |
|
if (err) { |
|
pr_info("error occurred as expected\n"); |
|
} else { |
|
pr_err("error: wrote past end of device\n"); |
|
errcnt += 1; |
|
} |
|
|
|
/* Attempt to read off end of device */ |
|
ops.mode = MTD_OPS_AUTO_OOB; |
|
ops.len = 0; |
|
ops.retlen = 0; |
|
ops.ooblen = mtd->oobavail; |
|
ops.oobretlen = 0; |
|
ops.ooboffs = 1; |
|
ops.datbuf = NULL; |
|
ops.oobbuf = readbuf; |
|
pr_info("attempting to read past end of device\n"); |
|
pr_info("an error is expected...\n"); |
|
err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops); |
|
if (mtd_is_bitflip(err)) |
|
err = 0; |
|
|
|
if (err) { |
|
pr_info("error occurred as expected\n"); |
|
} else { |
|
pr_err("error: read past end of device\n"); |
|
errcnt += 1; |
|
} |
|
} |
|
|
|
/* Fifth test: write / read across block boundaries */ |
|
pr_info("test 5 of 5\n"); |
|
|
|
/* Erase all eraseblocks */ |
|
err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); |
|
if (err) |
|
goto out; |
|
|
|
/* Write all eraseblocks */ |
|
prandom_seed_state(&rnd_state, 11); |
|
pr_info("writing OOBs of whole device\n"); |
|
for (i = 0; i < ebcnt - 1; ++i) { |
|
int cnt = 2; |
|
int pg; |
|
size_t sz = mtd->oobavail; |
|
if (bbt[i] || bbt[i + 1]) |
|
continue; |
|
addr = (loff_t)(i + 1) * mtd->erasesize - mtd->writesize; |
|
prandom_bytes_state(&rnd_state, writebuf, sz * cnt); |
|
for (pg = 0; pg < cnt; ++pg) { |
|
ops.mode = MTD_OPS_AUTO_OOB; |
|
ops.len = 0; |
|
ops.retlen = 0; |
|
ops.ooblen = sz; |
|
ops.oobretlen = 0; |
|
ops.ooboffs = 0; |
|
ops.datbuf = NULL; |
|
ops.oobbuf = writebuf + pg * sz; |
|
err = mtd_write_oob(mtd, addr, &ops); |
|
if (err) |
|
goto out; |
|
if (i % 256 == 0) |
|
pr_info("written up to eraseblock %u\n", i); |
|
|
|
err = mtdtest_relax(); |
|
if (err) |
|
goto out; |
|
|
|
addr += mtd->writesize; |
|
} |
|
} |
|
pr_info("written %u eraseblocks\n", i); |
|
|
|
/* Check all eraseblocks */ |
|
prandom_seed_state(&rnd_state, 11); |
|
pr_info("verifying all eraseblocks\n"); |
|
for (i = 0; i < ebcnt - 1; ++i) { |
|
if (bbt[i] || bbt[i + 1]) |
|
continue; |
|
prandom_bytes_state(&rnd_state, writebuf, mtd->oobavail * 2); |
|
addr = (loff_t)(i + 1) * mtd->erasesize - mtd->writesize; |
|
ops.mode = MTD_OPS_AUTO_OOB; |
|
ops.len = 0; |
|
ops.retlen = 0; |
|
ops.ooblen = mtd->oobavail * 2; |
|
ops.oobretlen = 0; |
|
ops.ooboffs = 0; |
|
ops.datbuf = NULL; |
|
ops.oobbuf = readbuf; |
|
err = mtd_read_oob(mtd, addr, &ops); |
|
if (mtd_is_bitflip(err)) |
|
err = 0; |
|
|
|
if (err) |
|
goto out; |
|
if (memcmpshow(addr, readbuf, writebuf, |
|
mtd->oobavail * 2)) { |
|
pr_err("error: verify failed at %#llx\n", |
|
(long long)addr); |
|
errcnt += 1; |
|
if (errcnt > 1000) { |
|
err = -EINVAL; |
|
pr_err("error: too many errors\n"); |
|
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); |
|
|
|
pr_info("finished with %d errors\n", errcnt); |
|
out: |
|
kfree(bbt); |
|
kfree(writebuf); |
|
kfree(readbuf); |
|
put_mtd_device(mtd); |
|
if (err) |
|
pr_info("error %d occurred\n", err); |
|
printk(KERN_INFO "=================================================\n"); |
|
return err; |
|
} |
|
module_init(mtd_oobtest_init); |
|
|
|
static void __exit mtd_oobtest_exit(void) |
|
{ |
|
return; |
|
} |
|
module_exit(mtd_oobtest_exit); |
|
|
|
MODULE_DESCRIPTION("Out-of-band test module"); |
|
MODULE_AUTHOR("Adrian Hunter"); |
|
MODULE_LICENSE("GPL");
|
|
|