[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 = 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 = 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 = kmalloc(pgsize * 4, GFP_KERNEL);
	if (!pp1)
		return -ENOMEM;
	pp2 = pp1 + pgsize;
	pp3 = pp2 + pgsize;
	pp4 = pp3 + pgsize;
	memset(pp1, 0, pgsize * 4);

	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 != MTD_NANDFLASH) {
		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);
		cond_resched();
	}
	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);
		cond_resched();
	}
	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	{
e73f2174 AB	55	loff_t addr = ebnum * mtd->erasesize;
e73f2174 AB	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;
	66	loff_t addr0, addrn;
	67	loff_t addr = ebnum * mtd->erasesize;
	68
	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");
e73f2174	130	pp1 = kmalloc(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;
	136	memset(pp1, 0, pgsize * 4);
	137
	138	addr0 = 0;
c6f7e7be	139	for (i = 0; i < ebcnt && bbt[i]; ++i)
e73f2174 AB	140	addr0 += mtd->erasesize;
	141
	142	addrn = mtd->size;
c6f7e7be	143	for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i)
e73f2174 AB	144	addrn -= mtd->erasesize;
	145
	146	/* Read 2nd-to-last page to pp1 */
e73f2174	147	addr = addrn - pgsize - pgsize;
66b28183 AM	148	err = mtdtest_read(mtd, addr, pgsize, pp1);
66b28183 AM	149	if (err) {
e73f2174 AB	150	kfree(pp1);
	151	return err;
	152	}
	153
	154	/* Read 3rd-to-last page to pp1 */
e73f2174	155	addr = addrn - pgsize - pgsize - pgsize;
66b28183 AM	156	err = mtdtest_read(mtd, addr, pgsize, pp1);
66b28183 AM	157	if (err) {
e73f2174 AB	158	kfree(pp1);
	159	return err;
	160	}
	161
	162	/* Read first page to pp2 */
e73f2174	163	addr = addr0;
bb998419	164	pr_info("reading page at %#llx\n", (long long)addr);
66b28183 AM	165	err = mtdtest_read(mtd, addr, pgsize, pp2);
66b28183 AM	166	if (err) {
e73f2174 AB	167	kfree(pp1);
	168	return err;
	169	}
	170
	171	/* Read last page to pp3 */
e73f2174	172	addr = addrn - pgsize;
bb998419	173	pr_info("reading page at %#llx\n", (long long)addr);
66b28183 AM	174	err = mtdtest_read(mtd, addr, pgsize, pp3);
66b28183 AM	175	if (err) {
e73f2174 AB	176	kfree(pp1);
	177	return err;
	178	}
	179
	180	/* Read first page again to pp4 */
e73f2174	181	addr = addr0;
bb998419	182	pr_info("reading page at %#llx\n", (long long)addr);
66b28183 AM	183	err = mtdtest_read(mtd, addr, pgsize, pp4);
66b28183 AM	184	if (err) {
e73f2174 AB	185	kfree(pp1);
	186	return err;
	187	}
	188
	189	/* pp2 and pp4 should be the same */
bb998419	190	pr_info("verifying pages read at %#llx match\n",
e73f2174 AB	191	(long long)addr0);
e73f2174 AB	192	if (memcmp(pp2, pp4, pgsize)) {
bb998419	193	pr_err("verify failed!\n");
e73f2174 AB	194	errcnt += 1;
e73f2174 AB	195	} else if (!err)
bb998419	196	pr_info("crosstest ok\n");
e73f2174 AB	197	kfree(pp1);
	198	return err;
	199	}
	200
	201	static int erasecrosstest(void)
	202	{
7fc14bce	203	int err = 0, i, ebnum, ebnum2;
e73f2174 AB	204	loff_t addr0;
	205	char *readbuf = twopages;
	206
bb998419	207	pr_info("erasecrosstest\n");
e73f2174 AB	208
	209	ebnum = 0;
	210	addr0 = 0;
c6f7e7be	211	for (i = 0; i < ebcnt && bbt[i]; ++i) {
e73f2174 AB	212	addr0 += mtd->erasesize;
	213	ebnum += 1;
	214	}
	215
	216	ebnum2 = ebcnt - 1;
	217	while (ebnum2 && bbt[ebnum2])
	218	ebnum2 -= 1;
	219
bb998419	220	pr_info("erasing block %d\n", ebnum);
66b28183	221	err = mtdtest_erase_eraseblock(mtd, ebnum);
e73f2174 AB	222	if (err)
	223	return err;
	224
bb998419	225	pr_info("writing 1st page of block %d\n", ebnum);
825b8ccb	226	prandom_bytes_state(&rnd_state, writebuf, pgsize);
e73f2174	227	strcpy(writebuf, "There is no data like this!");
66b28183	228	err = mtdtest_write(mtd, addr0, pgsize, writebuf);
8a9f4aa3	229	if (err)
66b28183	230	return err;
e73f2174	231
bb998419	232	pr_info("reading 1st page of block %d\n", ebnum);
e73f2174	233	memset(readbuf, 0, pgsize);
66b28183	234	err = mtdtest_read(mtd, addr0, pgsize, readbuf);
abc173ad	235	if (err)
66b28183	236	return err;
e73f2174	237
bb998419	238	pr_info("verifying 1st page of block %d\n", ebnum);
e73f2174	239	if (memcmp(writebuf, readbuf, pgsize)) {
bb998419	240	pr_err("verify failed!\n");
e73f2174	241	errcnt += 1;
7fc14bce	242	return -1;
e73f2174 AB	243	}
e73f2174 AB	244
bb998419	245	pr_info("erasing block %d\n", ebnum);
66b28183	246	err = mtdtest_erase_eraseblock(mtd, ebnum);
e73f2174 AB	247	if (err)
	248	return err;
	249
bb998419	250	pr_info("writing 1st page of block %d\n", ebnum);
825b8ccb	251	prandom_bytes_state(&rnd_state, writebuf, pgsize);
e73f2174	252	strcpy(writebuf, "There is no data like this!");
66b28183	253	err = mtdtest_write(mtd, addr0, pgsize, writebuf);
8a9f4aa3	254	if (err)
66b28183	255	return err;
e73f2174	256
bb998419	257	pr_info("erasing block %d\n", ebnum2);
66b28183	258	err = mtdtest_erase_eraseblock(mtd, ebnum2);
e73f2174 AB	259	if (err)
	260	return err;
	261
bb998419	262	pr_info("reading 1st page of block %d\n", ebnum);
e73f2174	263	memset(readbuf, 0, pgsize);
66b28183	264	err = mtdtest_read(mtd, addr0, pgsize, readbuf);
abc173ad	265	if (err)
66b28183	266	return err;
e73f2174	267
bb998419	268	pr_info("verifying 1st page of block %d\n", ebnum);
e73f2174	269	if (memcmp(writebuf, readbuf, pgsize)) {
bb998419	270	pr_err("verify failed!\n");
e73f2174	271	errcnt += 1;
7fc14bce	272	return -1;
e73f2174 AB	273	}
e73f2174 AB	274
7fc14bce	275	if (!err)
bb998419	276	pr_info("erasecrosstest ok\n");
e73f2174 AB	277	return err;
	278	}
	279
	280	static int erasetest(void)
	281	{
e73f2174 AB	282	int err = 0, i, ebnum, ok = 1;
	283	loff_t addr0;
	284
bb998419	285	pr_info("erasetest\n");
e73f2174 AB	286
	287	ebnum = 0;
	288	addr0 = 0;
c6f7e7be	289	for (i = 0; i < ebcnt && bbt[i]; ++i) {
e73f2174 AB	290	addr0 += mtd->erasesize;
	291	ebnum += 1;
	292	}
	293
bb998419	294	pr_info("erasing block %d\n", ebnum);
66b28183	295	err = mtdtest_erase_eraseblock(mtd, ebnum);
e73f2174 AB	296	if (err)
	297	return err;
	298
bb998419	299	pr_info("writing 1st page of block %d\n", ebnum);
825b8ccb	300	prandom_bytes_state(&rnd_state, writebuf, pgsize);
66b28183	301	err = mtdtest_write(mtd, addr0, pgsize, writebuf);
8a9f4aa3	302	if (err)
66b28183	303	return err;
e73f2174	304
bb998419	305	pr_info("erasing block %d\n", ebnum);
66b28183	306	err = mtdtest_erase_eraseblock(mtd, ebnum);
e73f2174 AB	307	if (err)
	308	return err;
	309
bb998419	310	pr_info("reading 1st page of block %d\n", ebnum);
66b28183	311	err = mtdtest_read(mtd, addr0, pgsize, twopages);
abc173ad	312	if (err)
66b28183	313	return err;
e73f2174	314
bb998419	315	pr_info("verifying 1st page of block %d is all 0xff\n",
e73f2174 AB	316	ebnum);
	317	for (i = 0; i < pgsize; ++i)
	318	if (twopages[i] != 0xff) {
bb998419	319	pr_err("verifying all 0xff failed at %d\n",
e73f2174 AB	320	i);
	321	errcnt += 1;
	322	ok = 0;
	323	break;
	324	}
	325
	326	if (ok && !err)
bb998419	327	pr_info("erasetest ok\n");
e73f2174 AB	328
	329	return err;
	330	}
	331
e73f2174 AB	332	static int __init mtd_pagetest_init(void)
	333	{
	334	int err = 0;
	335	uint64_t tmp;
	336	uint32_t i;
	337
	338	printk(KERN_INFO "\n");
	339	printk(KERN_INFO "=================================================\n");
7406060e WS	340
7406060e WS	341	if (dev < 0) {
064a7694	342	pr_info("Please specify a valid mtd-device via module parameter\n");
bb998419	343	pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
7406060e WS	344	return -EINVAL;
	345	}
	346
bb998419	347	pr_info("MTD device: %d\n", dev);
e73f2174 AB	348
	349	mtd = get_mtd_device(NULL, dev);
	350	if (IS_ERR(mtd)) {
	351	err = PTR_ERR(mtd);
bb998419	352	pr_err("error: cannot get MTD device\n");
e73f2174 AB	353	return err;
	354	}
	355
	356	if (mtd->type != MTD_NANDFLASH) {
bb998419	357	pr_info("this test requires NAND flash\n");
e73f2174 AB	358	goto out;
	359	}
	360
	361	tmp = mtd->size;
	362	do_div(tmp, mtd->erasesize);
	363	ebcnt = tmp;
	364	pgcnt = mtd->erasesize / mtd->writesize;
4c2b8a62	365	pgsize = mtd->writesize;
e73f2174	366
bb998419	367	pr_info("MTD device size %llu, eraseblock size %u, "
e73f2174 AB	368	"page size %u, count of eraseblocks %u, pages per "
	369	"eraseblock %u, OOB size %u\n",
	370	(unsigned long long)mtd->size, mtd->erasesize,
	371	pgsize, ebcnt, pgcnt, mtd->oobsize);
	372
	373	err = -ENOMEM;
	374	bufsize = pgsize * 2;
	375	writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);
33777e66	376	if (!writebuf)
e73f2174	377	goto out;
e73f2174	378	twopages = kmalloc(bufsize, GFP_KERNEL);
33777e66	379	if (!twopages)
e73f2174	380	goto out;
e73f2174	381	boundary = kmalloc(bufsize, GFP_KERNEL);
33777e66	382	if (!boundary)
e73f2174	383	goto out;
e73f2174	384
66b28183 AM	385	bbt = kzalloc(ebcnt, GFP_KERNEL);
	386	if (!bbt)
	387	goto out;
	388	err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt);
e73f2174 AB	389	if (err)
	390	goto out;
	391
	392	/* Erase all eraseblocks */
bb998419	393	pr_info("erasing whole device\n");
66b28183 AM	394	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
	395	if (err)
	396	goto out;
	397	pr_info("erased %u eraseblocks\n", ebcnt);
e73f2174 AB	398
e73f2174 AB	399	/* Write all eraseblocks */
825b8ccb	400	prandom_seed_state(&rnd_state, 1);
bb998419	401	pr_info("writing whole device\n");
e73f2174 AB	402	for (i = 0; i < ebcnt; ++i) {
	403	if (bbt[i])
	404	continue;
	405	err = write_eraseblock(i);
	406	if (err)
	407	goto out;
	408	if (i % 256 == 0)
bb998419	409	pr_info("written up to eraseblock %u\n", i);
e73f2174 AB	410	cond_resched();
e73f2174 AB	411	}
bb998419	412	pr_info("written %u eraseblocks\n", i);
e73f2174 AB	413
e73f2174 AB	414	/* Check all eraseblocks */
825b8ccb	415	prandom_seed_state(&rnd_state, 1);
bb998419	416	pr_info("verifying all eraseblocks\n");
e73f2174 AB	417	for (i = 0; i < ebcnt; ++i) {
	418	if (bbt[i])
	419	continue;
	420	err = verify_eraseblock(i);
	421	if (err)
	422	goto out;
	423	if (i % 256 == 0)
bb998419	424	pr_info("verified up to eraseblock %u\n", i);
e73f2174 AB	425	cond_resched();
e73f2174 AB	426	}
bb998419	427	pr_info("verified %u eraseblocks\n", i);
e73f2174 AB	428
	429	err = crosstest();
	430	if (err)
	431	goto out;
	432
	433	err = erasecrosstest();
	434	if (err)
	435	goto out;
	436
	437	err = erasetest();
	438	if (err)
	439	goto out;
	440
bb998419	441	pr_info("finished with %d errors\n", errcnt);
e73f2174 AB	442	out:
	443
	444	kfree(bbt);
	445	kfree(boundary);
	446	kfree(twopages);
	447	kfree(writebuf);
	448	put_mtd_device(mtd);
	449	if (err)
bb998419	450	pr_info("error %d occurred\n", err);
e73f2174 AB	451	printk(KERN_INFO "=================================================\n");
	452	return err;
	453	}
	454	module_init(mtd_pagetest_init);
	455
	456	static void __exit mtd_pagetest_exit(void)
	457	{
	458	return;
	459	}
	460	module_exit(mtd_pagetest_exit);
	461
	462	MODULE_DESCRIPTION("NAND page test");
	463	MODULE_AUTHOR("Adrian Hunter");
	464	MODULE_LICENSE("GPL");