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linux/drivers/mtd/tests/subpagetest.c
Thomas Gleixner 4cd10358d6 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 326 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 9 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000435.832876118@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:37:06 +02:00

438 lines
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2006-2007 Nokia Corporation
*
* Test sub-page read and write on MTD device.
* Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#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 *writebuf;
static unsigned char *readbuf;
static unsigned char *bbt;
static int subpgsize;
static int bufsize;
static int ebcnt;
static int pgcnt;
static int errcnt;
static struct rnd_state rnd_state;
static inline void clear_data(unsigned char *buf, size_t len)
{
memset(buf, 0, len);
}
static int write_eraseblock(int ebnum)
{
size_t written;
int err = 0;
loff_t addr = (loff_t)ebnum * mtd->erasesize;
prandom_bytes_state(&rnd_state, writebuf, subpgsize);
err = mtd_write(mtd, addr, subpgsize, &written, writebuf);
if (unlikely(err || written != subpgsize)) {
pr_err("error: write failed at %#llx\n",
(long long)addr);
if (written != subpgsize) {
pr_err(" write size: %#x\n", subpgsize);
pr_err(" written: %#zx\n", written);
}
return err ? err : -1;
}
addr += subpgsize;
prandom_bytes_state(&rnd_state, writebuf, subpgsize);
err = mtd_write(mtd, addr, subpgsize, &written, writebuf);
if (unlikely(err || written != subpgsize)) {
pr_err("error: write failed at %#llx\n",
(long long)addr);
if (written != subpgsize) {
pr_err(" write size: %#x\n", subpgsize);
pr_err(" written: %#zx\n", written);
}
return err ? err : -1;
}
return err;
}
static int write_eraseblock2(int ebnum)
{
size_t written;
int err = 0, k;
loff_t addr = (loff_t)ebnum * mtd->erasesize;
for (k = 1; k < 33; ++k) {
if (addr + (subpgsize * k) > (loff_t)(ebnum + 1) * mtd->erasesize)
break;
prandom_bytes_state(&rnd_state, writebuf, subpgsize * k);
err = mtd_write(mtd, addr, subpgsize * k, &written, writebuf);
if (unlikely(err || written != subpgsize * k)) {
pr_err("error: write failed at %#llx\n",
(long long)addr);
if (written != subpgsize * k) {
pr_err(" write size: %#x\n",
subpgsize * k);
pr_err(" written: %#08zx\n",
written);
}
return err ? err : -1;
}
addr += subpgsize * k;
}
return err;
}
static void print_subpage(unsigned char *p)
{
int i, j;
for (i = 0; i < subpgsize; ) {
for (j = 0; i < subpgsize && j < 32; ++i, ++j)
printk("%02x", *p++);
printk("\n");
}
}
static int verify_eraseblock(int ebnum)
{
size_t read;
int err = 0;
loff_t addr = (loff_t)ebnum * mtd->erasesize;
prandom_bytes_state(&rnd_state, writebuf, subpgsize);
clear_data(readbuf, subpgsize);
err = mtd_read(mtd, addr, subpgsize, &read, readbuf);
if (unlikely(err || read != subpgsize)) {
if (mtd_is_bitflip(err) && read == subpgsize) {
pr_info("ECC correction at %#llx\n",
(long long)addr);
err = 0;
} else {
pr_err("error: read failed at %#llx\n",
(long long)addr);
return err ? err : -1;
}
}
if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
pr_err("error: verify failed at %#llx\n",
(long long)addr);
pr_info("------------- written----------------\n");
print_subpage(writebuf);
pr_info("------------- read ------------------\n");
print_subpage(readbuf);
pr_info("-------------------------------------\n");
errcnt += 1;
}
addr += subpgsize;
prandom_bytes_state(&rnd_state, writebuf, subpgsize);
clear_data(readbuf, subpgsize);
err = mtd_read(mtd, addr, subpgsize, &read, readbuf);
if (unlikely(err || read != subpgsize)) {
if (mtd_is_bitflip(err) && read == subpgsize) {
pr_info("ECC correction at %#llx\n",
(long long)addr);
err = 0;
} else {
pr_err("error: read failed at %#llx\n",
(long long)addr);
return err ? err : -1;
}
}
if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
pr_info("error: verify failed at %#llx\n",
(long long)addr);
pr_info("------------- written----------------\n");
print_subpage(writebuf);
pr_info("------------- read ------------------\n");
print_subpage(readbuf);
pr_info("-------------------------------------\n");
errcnt += 1;
}
return err;
}
static int verify_eraseblock2(int ebnum)
{
size_t read;
int err = 0, k;
loff_t addr = (loff_t)ebnum * mtd->erasesize;
for (k = 1; k < 33; ++k) {
if (addr + (subpgsize * k) > (loff_t)(ebnum + 1) * mtd->erasesize)
break;
prandom_bytes_state(&rnd_state, writebuf, subpgsize * k);
clear_data(readbuf, subpgsize * k);
err = mtd_read(mtd, addr, subpgsize * k, &read, readbuf);
if (unlikely(err || read != subpgsize * k)) {
if (mtd_is_bitflip(err) && read == subpgsize * k) {
pr_info("ECC correction at %#llx\n",
(long long)addr);
err = 0;
} else {
pr_err("error: read failed at "
"%#llx\n", (long long)addr);
return err ? err : -1;
}
}
if (unlikely(memcmp(readbuf, writebuf, subpgsize * k))) {
pr_err("error: verify failed at %#llx\n",
(long long)addr);
errcnt += 1;
}
addr += subpgsize * k;
}
return err;
}
static int verify_eraseblock_ff(int ebnum)
{
uint32_t j;
size_t read;
int err = 0;
loff_t addr = (loff_t)ebnum * mtd->erasesize;
memset(writebuf, 0xff, subpgsize);
for (j = 0; j < mtd->erasesize / subpgsize; ++j) {
clear_data(readbuf, subpgsize);
err = mtd_read(mtd, addr, subpgsize, &read, readbuf);
if (unlikely(err || read != subpgsize)) {
if (mtd_is_bitflip(err) && read == subpgsize) {
pr_info("ECC correction at %#llx\n",
(long long)addr);
err = 0;
} else {
pr_err("error: read failed at "
"%#llx\n", (long long)addr);
return err ? err : -1;
}
}
if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
pr_err("error: verify 0xff failed at "
"%#llx\n", (long long)addr);
errcnt += 1;
}
addr += subpgsize;
}
return err;
}
static int verify_all_eraseblocks_ff(void)
{
int err;
unsigned int i;
pr_info("verifying all eraseblocks for 0xff\n");
for (i = 0; i < ebcnt; ++i) {
if (bbt[i])
continue;
err = verify_eraseblock_ff(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_subpagetest_init(void)
{
int err = 0;
uint32_t i;
uint64_t tmp;
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;
}
subpgsize = mtd->writesize >> mtd->subpage_sft;
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, subpage size %u, count of eraseblocks %u, "
"pages per eraseblock %u, OOB size %u\n",
(unsigned long long)mtd->size, mtd->erasesize,
mtd->writesize, subpgsize, ebcnt, pgcnt, mtd->oobsize);
err = -ENOMEM;
bufsize = subpgsize * 32;
writebuf = kmalloc(bufsize, GFP_KERNEL);
if (!writebuf)
goto out;
readbuf = kmalloc(bufsize, GFP_KERNEL);
if (!readbuf)
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;
err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
if (err)
goto out;
pr_info("writing whole device\n");
prandom_seed_state(&rnd_state, 1);
for (i = 0; i < ebcnt; ++i) {
if (bbt[i])
continue;
err = write_eraseblock(i);
if (unlikely(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);
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 (unlikely(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 = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
if (err)
goto out;
err = verify_all_eraseblocks_ff();
if (err)
goto out;
/* Write all eraseblocks */
prandom_seed_state(&rnd_state, 3);
pr_info("writing whole device\n");
for (i = 0; i < ebcnt; ++i) {
if (bbt[i])
continue;
err = write_eraseblock2(i);
if (unlikely(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, 3);
pr_info("verifying all eraseblocks\n");
for (i = 0; i < ebcnt; ++i) {
if (bbt[i])
continue;
err = verify_eraseblock2(i);
if (unlikely(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 = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
if (err)
goto out;
err = verify_all_eraseblocks_ff();
if (err)
goto out;
pr_info("finished with %d errors\n", errcnt);
out:
kfree(bbt);
kfree(readbuf);
kfree(writebuf);
put_mtd_device(mtd);
if (err)
pr_info("error %d occurred\n", err);
printk(KERN_INFO "=================================================\n");
return err;
}
module_init(mtd_subpagetest_init);
static void __exit mtd_subpagetest_exit(void)
{
return;
}
module_exit(mtd_subpagetest_exit);
MODULE_DESCRIPTION("Subpage test module");
MODULE_AUTHOR("Adrian Hunter");
MODULE_LICENSE("GPL");
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