linux/drivers/mtd/tests/oobtest.c

// 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) …

#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 = …;
static int bitflip_limit;
module_param(dev, int, S_IRUGO);
MODULE_PARM_DESC(…) …;
module_param(bitflip_limit, int, S_IRUGO);
MODULE_PARM_DESC(…) …;

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)
{ … }

static int write_eraseblock(int ebnum)
{ … }

static int write_whole_device(void)
{ … }

/*
 * 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)
{ … }

#define memcmpshow(addr, 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)
{ … }

static int verify_eraseblock(int ebnum)
{ … }

static int verify_eraseblock_in_one_go(int ebnum)
{ … }

static int verify_all_eraseblocks(void)
{ … }

static int __init mtd_oobtest_init(void)
{ … }
module_init(mtd_oobtest_init);

static void __exit mtd_oobtest_exit(void)
{ … }
module_exit(mtd_oobtest_exit);

MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;
MODULE_LICENSE(…) …;