[deliverable/linux.git] / drivers / mtd / tests / pagetest.c

/*
 * Copyright (C) 2006-2008 Nokia Corporation
 *
 * 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.
 *
 * 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 = kzalloc(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;

	err = erasecrosstest();
	if (err)
		goto out;

	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");
Commit	Line	Data
e73f2174 AB	1	/*
	2	* Copyright (C) 2006-2008 Nokia Corporation
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License version 2 as published by
	6	* the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program; see the file COPYING. If not, write to the Free Software
	15	* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	16	*
	17	* Test page read and write on MTD device.
	18	*
	19	* Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
	20	*/
	21
bb998419 VN	22	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
bb998419 VN	23
e73f2174 AB	24	#include <asm/div64.h>
	25	#include <linux/init.h>
	26	#include <linux/module.h>
	27	#include <linux/moduleparam.h>
	28	#include <linux/err.h>
	29	#include <linux/mtd/mtd.h>
5a0e3ad6	30	#include <linux/slab.h>
e73f2174	31	#include <linux/sched.h>
825b8ccb	32	#include <linux/random.h>
e73f2174	33
66b28183 AM	34	#include "mtd_test.h"
66b28183 AM	35
7406060e	36	static int dev = -EINVAL;
e73f2174 AB	37	module_param(dev, int, S_IRUGO);
	38	MODULE_PARM_DESC(dev, "MTD device number to use");
	39
	40	static struct mtd_info *mtd;
	41	static unsigned char *twopages;
	42	static unsigned char *writebuf;
	43	static unsigned char *boundary;
	44	static unsigned char *bbt;
	45
	46	static int pgsize;
	47	static int bufsize;
	48	static int ebcnt;
	49	static int pgcnt;
	50	static int errcnt;
825b8ccb	51	static struct rnd_state rnd_state;
e73f2174	52
e73f2174 AB	53	static int write_eraseblock(int ebnum)
e73f2174 AB	54	{
1001ff7a	55	loff_t addr = (loff_t)ebnum * mtd->erasesize;
e73f2174	56
825b8ccb	57	prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize);
e73f2174	58	cond_resched();
8a9f4aa3	59	return mtdtest_write(mtd, addr, mtd->erasesize, writebuf);
e73f2174 AB	60	}
	61
	62	static int verify_eraseblock(int ebnum)
	63	{
	64	uint32_t j;
e73f2174 AB	65	int err = 0, i;
e73f2174 AB	66	loff_t addr0, addrn;
1001ff7a	67	loff_t addr = (loff_t)ebnum * mtd->erasesize;
e73f2174 AB	68
e73f2174 AB	69	addr0 = 0;
c6f7e7be	70	for (i = 0; i < ebcnt && bbt[i]; ++i)
e73f2174 AB	71	addr0 += mtd->erasesize;
	72
	73	addrn = mtd->size;
c6f7e7be	74	for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i)
e73f2174 AB	75	addrn -= mtd->erasesize;
e73f2174 AB	76
825b8ccb	77	prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize);
e73f2174 AB	78	for (j = 0; j < pgcnt - 1; ++j, addr += pgsize) {
e73f2174 AB	79	/* Do a read to set the internal dataRAMs to different data */
66b28183	80	err = mtdtest_read(mtd, addr0, bufsize, twopages);
abc173ad	81	if (err)
e73f2174	82	return err;
66b28183	83	err = mtdtest_read(mtd, addrn - bufsize, bufsize, twopages);
abc173ad	84	if (err)
e73f2174	85	return err;
e73f2174	86	memset(twopages, 0, bufsize);
66b28183	87	err = mtdtest_read(mtd, addr, bufsize, twopages);
abc173ad	88	if (err)
e73f2174	89	break;
e73f2174	90	if (memcmp(twopages, writebuf + (j * pgsize), bufsize)) {
bb998419	91	pr_err("error: verify failed at %#llx\n",
e73f2174 AB	92	(long long)addr);
	93	errcnt += 1;
	94	}
	95	}
	96	/* Check boundary between eraseblocks */
	97	if (addr <= addrn - pgsize - pgsize && !bbt[ebnum + 1]) {
825b8ccb AM	98	struct rnd_state old_state = rnd_state;
825b8ccb AM	99
e73f2174	100	/* Do a read to set the internal dataRAMs to different data */
66b28183	101	err = mtdtest_read(mtd, addr0, bufsize, twopages);
abc173ad	102	if (err)
e73f2174	103	return err;
66b28183	104	err = mtdtest_read(mtd, addrn - bufsize, bufsize, twopages);
abc173ad	105	if (err)
e73f2174	106	return err;
e73f2174	107	memset(twopages, 0, bufsize);
66b28183	108	err = mtdtest_read(mtd, addr, bufsize, twopages);
abc173ad	109	if (err)
e73f2174	110	return err;
e73f2174	111	memcpy(boundary, writebuf + mtd->erasesize - pgsize, pgsize);
825b8ccb	112	prandom_bytes_state(&rnd_state, boundary + pgsize, pgsize);
e73f2174	113	if (memcmp(twopages, boundary, bufsize)) {
bb998419	114	pr_err("error: verify failed at %#llx\n",
e73f2174 AB	115	(long long)addr);
	116	errcnt += 1;
	117	}
825b8ccb	118	rnd_state = old_state;
e73f2174 AB	119	}
	120	return err;
	121	}
	122
	123	static int crosstest(void)
	124	{
e73f2174 AB	125	int err = 0, i;
	126	loff_t addr, addr0, addrn;
	127	unsigned char pp1, pp2, pp3, pp4;
	128
bb998419	129	pr_info("crosstest\n");
6e75632a	130	pp1 = kzalloc(pgsize * 4, GFP_KERNEL);
33777e66	131	if (!pp1)
e73f2174	132	return -ENOMEM;
e73f2174 AB	133	pp2 = pp1 + pgsize;
	134	pp3 = pp2 + pgsize;
	135	pp4 = pp3 + pgsize;
e73f2174 AB	136
e73f2174 AB	137	addr0 = 0;
c6f7e7be	138	for (i = 0; i < ebcnt && bbt[i]; ++i)
e73f2174 AB	139	addr0 += mtd->erasesize;
	140
	141	addrn = mtd->size;
c6f7e7be	142	for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i)
e73f2174 AB	143	addrn -= mtd->erasesize;
	144
	145	/* Read 2nd-to-last page to pp1 */
e73f2174	146	addr = addrn - pgsize - pgsize;
66b28183 AM	147	err = mtdtest_read(mtd, addr, pgsize, pp1);
66b28183 AM	148	if (err) {
e73f2174 AB	149	kfree(pp1);
	150	return err;
	151	}
	152
	153	/* Read 3rd-to-last page to pp1 */
e73f2174	154	addr = addrn - pgsize - pgsize - pgsize;
66b28183 AM	155	err = mtdtest_read(mtd, addr, pgsize, pp1);
66b28183 AM	156	if (err) {
e73f2174 AB	157	kfree(pp1);
	158	return err;
	159	}
	160
	161	/* Read first page to pp2 */
e73f2174	162	addr = addr0;
bb998419	163	pr_info("reading page at %#llx\n", (long long)addr);
66b28183 AM	164	err = mtdtest_read(mtd, addr, pgsize, pp2);
66b28183 AM	165	if (err) {
e73f2174 AB	166	kfree(pp1);
	167	return err;
	168	}
	169
	170	/* Read last page to pp3 */
e73f2174	171	addr = addrn - pgsize;
bb998419	172	pr_info("reading page at %#llx\n", (long long)addr);
66b28183 AM	173	err = mtdtest_read(mtd, addr, pgsize, pp3);
66b28183 AM	174	if (err) {
e73f2174 AB	175	kfree(pp1);
	176	return err;
	177	}
	178
	179	/* Read first page again to pp4 */
e73f2174	180	addr = addr0;
bb998419	181	pr_info("reading page at %#llx\n", (long long)addr);
66b28183 AM	182	err = mtdtest_read(mtd, addr, pgsize, pp4);
66b28183 AM	183	if (err) {
e73f2174 AB	184	kfree(pp1);
	185	return err;
	186	}
	187
	188	/* pp2 and pp4 should be the same */
bb998419	189	pr_info("verifying pages read at %#llx match\n",
e73f2174 AB	190	(long long)addr0);
e73f2174 AB	191	if (memcmp(pp2, pp4, pgsize)) {
bb998419	192	pr_err("verify failed!\n");
e73f2174 AB	193	errcnt += 1;
e73f2174 AB	194	} else if (!err)
bb998419	195	pr_info("crosstest ok\n");
e73f2174 AB	196	kfree(pp1);
	197	return err;
	198	}
	199
	200	static int erasecrosstest(void)
	201	{
7fc14bce	202	int err = 0, i, ebnum, ebnum2;
e73f2174 AB	203	loff_t addr0;
	204	char *readbuf = twopages;
	205
bb998419	206	pr_info("erasecrosstest\n");
e73f2174 AB	207
	208	ebnum = 0;
	209	addr0 = 0;
c6f7e7be	210	for (i = 0; i < ebcnt && bbt[i]; ++i) {
e73f2174 AB	211	addr0 += mtd->erasesize;
	212	ebnum += 1;
	213	}
	214
	215	ebnum2 = ebcnt - 1;
	216	while (ebnum2 && bbt[ebnum2])
	217	ebnum2 -= 1;
	218
bb998419	219	pr_info("erasing block %d\n", ebnum);
66b28183	220	err = mtdtest_erase_eraseblock(mtd, ebnum);
e73f2174 AB	221	if (err)
	222	return err;
	223
bb998419	224	pr_info("writing 1st page of block %d\n", ebnum);
825b8ccb	225	prandom_bytes_state(&rnd_state, writebuf, pgsize);
e73f2174	226	strcpy(writebuf, "There is no data like this!");
66b28183	227	err = mtdtest_write(mtd, addr0, pgsize, writebuf);
8a9f4aa3	228	if (err)
66b28183	229	return err;
e73f2174	230
bb998419	231	pr_info("reading 1st page of block %d\n", ebnum);
e73f2174	232	memset(readbuf, 0, pgsize);
66b28183	233	err = mtdtest_read(mtd, addr0, pgsize, readbuf);
abc173ad	234	if (err)
66b28183	235	return err;
e73f2174	236
bb998419	237	pr_info("verifying 1st page of block %d\n", ebnum);
e73f2174	238	if (memcmp(writebuf, readbuf, pgsize)) {
bb998419	239	pr_err("verify failed!\n");
e73f2174	240	errcnt += 1;
7fc14bce	241	return -1;
e73f2174 AB	242	}
e73f2174 AB	243
bb998419	244	pr_info("erasing block %d\n", ebnum);
66b28183	245	err = mtdtest_erase_eraseblock(mtd, ebnum);
e73f2174 AB	246	if (err)
	247	return err;
	248
bb998419	249	pr_info("writing 1st page of block %d\n", ebnum);
825b8ccb	250	prandom_bytes_state(&rnd_state, writebuf, pgsize);
e73f2174	251	strcpy(writebuf, "There is no data like this!");
66b28183	252	err = mtdtest_write(mtd, addr0, pgsize, writebuf);
8a9f4aa3	253	if (err)
66b28183	254	return err;
e73f2174	255
bb998419	256	pr_info("erasing block %d\n", ebnum2);
66b28183	257	err = mtdtest_erase_eraseblock(mtd, ebnum2);
e73f2174 AB	258	if (err)
	259	return err;
	260
bb998419	261	pr_info("reading 1st page of block %d\n", ebnum);
e73f2174	262	memset(readbuf, 0, pgsize);
66b28183	263	err = mtdtest_read(mtd, addr0, pgsize, readbuf);
abc173ad	264	if (err)
66b28183	265	return err;
e73f2174	266
bb998419	267	pr_info("verifying 1st page of block %d\n", ebnum);
e73f2174	268	if (memcmp(writebuf, readbuf, pgsize)) {
bb998419	269	pr_err("verify failed!\n");
e73f2174	270	errcnt += 1;
7fc14bce	271	return -1;
e73f2174 AB	272	}
e73f2174 AB	273
7fc14bce	274	if (!err)
bb998419	275	pr_info("erasecrosstest ok\n");
e73f2174 AB	276	return err;
	277	}
	278
	279	static int erasetest(void)
	280	{
e73f2174 AB	281	int err = 0, i, ebnum, ok = 1;
	282	loff_t addr0;
	283
bb998419	284	pr_info("erasetest\n");
e73f2174 AB	285
	286	ebnum = 0;
	287	addr0 = 0;
c6f7e7be	288	for (i = 0; i < ebcnt && bbt[i]; ++i) {
e73f2174 AB	289	addr0 += mtd->erasesize;
	290	ebnum += 1;
	291	}
	292
bb998419	293	pr_info("erasing block %d\n", ebnum);
66b28183	294	err = mtdtest_erase_eraseblock(mtd, ebnum);
e73f2174 AB	295	if (err)
	296	return err;
	297
bb998419	298	pr_info("writing 1st page of block %d\n", ebnum);
825b8ccb	299	prandom_bytes_state(&rnd_state, writebuf, pgsize);
66b28183	300	err = mtdtest_write(mtd, addr0, pgsize, writebuf);
8a9f4aa3	301	if (err)
66b28183	302	return err;
e73f2174	303
bb998419	304	pr_info("erasing block %d\n", ebnum);
66b28183	305	err = mtdtest_erase_eraseblock(mtd, ebnum);
e73f2174 AB	306	if (err)
	307	return err;
	308
bb998419	309	pr_info("reading 1st page of block %d\n", ebnum);
66b28183	310	err = mtdtest_read(mtd, addr0, pgsize, twopages);
abc173ad	311	if (err)
66b28183	312	return err;
e73f2174	313
bb998419	314	pr_info("verifying 1st page of block %d is all 0xff\n",
e73f2174 AB	315	ebnum);
	316	for (i = 0; i < pgsize; ++i)
	317	if (twopages[i] != 0xff) {
bb998419	318	pr_err("verifying all 0xff failed at %d\n",
e73f2174 AB	319	i);
	320	errcnt += 1;
	321	ok = 0;
	322	break;
	323	}
	324
	325	if (ok && !err)
bb998419	326	pr_info("erasetest ok\n");
e73f2174 AB	327
	328	return err;
	329	}
	330
e73f2174 AB	331	static int __init mtd_pagetest_init(void)
	332	{
	333	int err = 0;
	334	uint64_t tmp;
	335	uint32_t i;
	336
	337	printk(KERN_INFO "\n");
	338	printk(KERN_INFO "=================================================\n");
7406060e WS	339
7406060e WS	340	if (dev < 0) {
064a7694	341	pr_info("Please specify a valid mtd-device via module parameter\n");
bb998419	342	pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
7406060e WS	343	return -EINVAL;
	344	}
	345
bb998419	346	pr_info("MTD device: %d\n", dev);
e73f2174 AB	347
	348	mtd = get_mtd_device(NULL, dev);
	349	if (IS_ERR(mtd)) {
	350	err = PTR_ERR(mtd);
bb998419	351	pr_err("error: cannot get MTD device\n");
e73f2174 AB	352	return err;
	353	}
	354
818b9739	355	if (!mtd_type_is_nand(mtd)) {
bb998419	356	pr_info("this test requires NAND flash\n");
e73f2174 AB	357	goto out;
	358	}
	359
	360	tmp = mtd->size;
	361	do_div(tmp, mtd->erasesize);
	362	ebcnt = tmp;
	363	pgcnt = mtd->erasesize / mtd->writesize;
4c2b8a62	364	pgsize = mtd->writesize;
e73f2174	365
bb998419	366	pr_info("MTD device size %llu, eraseblock size %u, "
e73f2174 AB	367	"page size %u, count of eraseblocks %u, pages per "
	368	"eraseblock %u, OOB size %u\n",
	369	(unsigned long long)mtd->size, mtd->erasesize,
	370	pgsize, ebcnt, pgcnt, mtd->oobsize);
	371
	372	err = -ENOMEM;
	373	bufsize = pgsize * 2;
	374	writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);
33777e66	375	if (!writebuf)
e73f2174	376	goto out;
e73f2174	377	twopages = kmalloc(bufsize, GFP_KERNEL);
33777e66	378	if (!twopages)
e73f2174	379	goto out;
e73f2174	380	boundary = kmalloc(bufsize, GFP_KERNEL);
33777e66	381	if (!boundary)
e73f2174	382	goto out;
e73f2174	383
66b28183 AM	384	bbt = kzalloc(ebcnt, GFP_KERNEL);
	385	if (!bbt)
	386	goto out;
	387	err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt);
e73f2174 AB	388	if (err)
	389	goto out;
	390
	391	/* Erase all eraseblocks */
bb998419	392	pr_info("erasing whole device\n");
66b28183 AM	393	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
	394	if (err)
	395	goto out;
	396	pr_info("erased %u eraseblocks\n", ebcnt);
e73f2174 AB	397
e73f2174 AB	398	/* Write all eraseblocks */
825b8ccb	399	prandom_seed_state(&rnd_state, 1);
bb998419	400	pr_info("writing whole device\n");
e73f2174 AB	401	for (i = 0; i < ebcnt; ++i) {
	402	if (bbt[i])
	403	continue;
	404	err = write_eraseblock(i);
	405	if (err)
	406	goto out;
	407	if (i % 256 == 0)
bb998419	408	pr_info("written up to eraseblock %u\n", i);
2a6a28e7 RW	409
	410	err = mtdtest_relax();
	411	if (err)
	412	goto out;
e73f2174	413	}
bb998419	414	pr_info("written %u eraseblocks\n", i);
e73f2174 AB	415
e73f2174 AB	416	/* Check all eraseblocks */
825b8ccb	417	prandom_seed_state(&rnd_state, 1);
bb998419	418	pr_info("verifying all eraseblocks\n");
e73f2174 AB	419	for (i = 0; i < ebcnt; ++i) {
	420	if (bbt[i])
	421	continue;
	422	err = verify_eraseblock(i);
	423	if (err)
	424	goto out;
	425	if (i % 256 == 0)
bb998419	426	pr_info("verified up to eraseblock %u\n", i);
2a6a28e7 RW	427
	428	err = mtdtest_relax();
	429	if (err)
	430	goto out;
e73f2174	431	}
bb998419	432	pr_info("verified %u eraseblocks\n", i);
e73f2174 AB	433
	434	err = crosstest();
	435	if (err)
	436	goto out;
	437
	438	err = erasecrosstest();
	439	if (err)
	440	goto out;
	441
	442	err = erasetest();
	443	if (err)
	444	goto out;
	445
bb998419	446	pr_info("finished with %d errors\n", errcnt);
e73f2174 AB	447	out:
	448
	449	kfree(bbt);
	450	kfree(boundary);
	451	kfree(twopages);
	452	kfree(writebuf);
	453	put_mtd_device(mtd);
	454	if (err)
bb998419	455	pr_info("error %d occurred\n", err);
e73f2174 AB	456	printk(KERN_INFO "=================================================\n");
	457	return err;
	458	}
	459	module_init(mtd_pagetest_init);
	460
	461	static void __exit mtd_pagetest_exit(void)
	462	{
	463	return;
	464	}
	465	module_exit(mtd_pagetest_exit);
	466
	467	MODULE_DESCRIPTION("NAND page test");
	468	MODULE_AUTHOR("Adrian Hunter");
	469	MODULE_LICENSE("GPL");