[linux-2.6-block.git] / drivers / mtd / tests / readtest.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.
 *
 * Check MTD device read.
 *
 * 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 "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 *iobuf;
static unsigned char *iobuf1;
static unsigned char *bbt;

static int pgsize;
static int ebcnt;
static int pgcnt;

static int read_eraseblock_by_page(int ebnum)
{
	int i, ret, err = 0;
	loff_t addr = (loff_t)ebnum * mtd->erasesize;
	void *buf = iobuf;
	void *oobbuf = iobuf1;

	for (i = 0; i < pgcnt; i++) {
		memset(buf, 0 , pgsize);
		ret = mtdtest_read(mtd, addr, pgsize, buf);
		if (ret) {
			if (!err)
				err = ret;
		}
		if (mtd->oobsize) {
			struct mtd_oob_ops ops;

			ops.mode      = MTD_OPS_PLACE_OOB;
			ops.len       = 0;
			ops.retlen    = 0;
			ops.ooblen    = mtd->oobsize;
			ops.oobretlen = 0;
			ops.ooboffs   = 0;
			ops.datbuf    = NULL;
			ops.oobbuf    = oobbuf;
			ret = mtd_read_oob(mtd, addr, &ops);
			if ((ret && !mtd_is_bitflip(ret)) ||
					ops.oobretlen != mtd->oobsize) {
				pr_err("error: read oob failed at "
						  "%#llx\n", (long long)addr);
				if (!err)
					err = ret;
				if (!err)
					err = -EINVAL;
			}
			oobbuf += mtd->oobsize;
		}
		addr += pgsize;
		buf += pgsize;
	}

	return err;
}

static void dump_eraseblock(int ebnum)
{
	int i, j, n;
	char line[128];
	int pg, oob;

	pr_info("dumping eraseblock %d\n", ebnum);
	n = mtd->erasesize;
	for (i = 0; i < n;) {
		char *p = line;

		p += sprintf(p, "%05x: ", i);
		for (j = 0; j < 32 && i < n; j++, i++)
			p += sprintf(p, "%02x", (unsigned int)iobuf[i]);
		printk(KERN_CRIT "%s\n", line);
		cond_resched();
	}
	if (!mtd->oobsize)
		return;
	pr_info("dumping oob from eraseblock %d\n", ebnum);
	n = mtd->oobsize;
	for (pg = 0, i = 0; pg < pgcnt; pg++)
		for (oob = 0; oob < n;) {
			char *p = line;

			p += sprintf(p, "%05x: ", i);
			for (j = 0; j < 32 && oob < n; j++, oob++, i++)
				p += sprintf(p, "%02x",
					     (unsigned int)iobuf1[i]);
			printk(KERN_CRIT "%s\n", line);
			cond_resched();
		}
}

static int __init mtd_readtest_init(void)
{
	uint64_t tmp;
	int err, i;

	printk(KERN_INFO "\n");
	printk(KERN_INFO "=================================================\n");

	if (dev < 0) {
		pr_info("Please specify a valid mtd-device via module parameter\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->writesize == 1) {
		pr_info("not NAND flash, assume page size is 512 "
		       "bytes.\n");
		pgsize = 512;
	} else
		pgsize = mtd->writesize;

	tmp = mtd->size;
	do_div(tmp, mtd->erasesize);
	ebcnt = tmp;
	pgcnt = mtd->erasesize / pgsize;

	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;
	iobuf = kmalloc(mtd->erasesize, GFP_KERNEL);
	if (!iobuf)
		goto out;
	iobuf1 = kmalloc(mtd->erasesize, GFP_KERNEL);
	if (!iobuf1)
		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;

	/* Read all eraseblocks 1 page at a time */
	pr_info("testing page read\n");
	for (i = 0; i < ebcnt; ++i) {
		int ret;

		if (bbt[i])
			continue;
		ret = read_eraseblock_by_page(i);
		if (ret) {
			dump_eraseblock(i);
			if (!err)
				err = ret;
		}

		ret = mtdtest_relax();
		if (ret) {
			err = ret;
			goto out;
		}
	}

	if (err)
		pr_info("finished with errors\n");
	else
		pr_info("finished\n");

out:

	kfree(iobuf);
	kfree(iobuf1);
	kfree(bbt);
	put_mtd_device(mtd);
	if (err)
		pr_info("error %d occurred\n", err);
	printk(KERN_INFO "=================================================\n");
	return err;
}
module_init(mtd_readtest_init);

static void __exit mtd_readtest_exit(void)
{
	return;
}
module_exit(mtd_readtest_exit);

MODULE_DESCRIPTION("Read test module");
MODULE_AUTHOR("Adrian Hunter");
MODULE_LICENSE("GPL");
Commit	Line	Data
72091b68 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	* Check MTD device read.
	18	*
	19	* Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
	20	*/
	21
e45048a6 VN	22	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
e45048a6 VN	23
72091b68 AB	24	#include <linux/init.h>
	25	#include <linux/module.h>
	26	#include <linux/moduleparam.h>
	27	#include <linux/err.h>
	28	#include <linux/mtd/mtd.h>
5a0e3ad6	29	#include <linux/slab.h>
72091b68 AB	30	#include <linux/sched.h>
72091b68 AB	31
bf9c2236 AM	32	#include "mtd_test.h"
bf9c2236 AM	33
7406060e	34	static int dev = -EINVAL;
72091b68 AB	35	module_param(dev, int, S_IRUGO);
	36	MODULE_PARM_DESC(dev, "MTD device number to use");
	37
	38	static struct mtd_info *mtd;
	39	static unsigned char *iobuf;
	40	static unsigned char *iobuf1;
	41	static unsigned char *bbt;
	42
	43	static int pgsize;
	44	static int ebcnt;
	45	static int pgcnt;
	46
	47	static int read_eraseblock_by_page(int ebnum)
	48	{
72091b68	49	int i, ret, err = 0;
1001ff7a	50	loff_t addr = (loff_t)ebnum * mtd->erasesize;
72091b68 AB	51	void *buf = iobuf;
	52	void *oobbuf = iobuf1;
	53
	54	for (i = 0; i < pgcnt; i++) {
d8b1e34e	55	memset(buf, 0 , pgsize);
bf9c2236 AM	56	ret = mtdtest_read(mtd, addr, pgsize, buf);
bf9c2236 AM	57	if (ret) {
72091b68 AB	58	if (!err)
72091b68 AB	59	err = ret;
72091b68 AB	60	}
	61	if (mtd->oobsize) {
	62	struct mtd_oob_ops ops;
	63
0612b9dd	64	ops.mode = MTD_OPS_PLACE_OOB;
72091b68 AB	65	ops.len = 0;
	66	ops.retlen = 0;
	67	ops.ooblen = mtd->oobsize;
	68	ops.oobretlen = 0;
	69	ops.ooboffs = 0;
23d42494	70	ops.datbuf = NULL;
72091b68	71	ops.oobbuf = oobbuf;
fd2819bb	72	ret = mtd_read_oob(mtd, addr, &ops);
d57f4054	73	if ((ret && !mtd_is_bitflip(ret)) \|\|
003bc479	74	ops.oobretlen != mtd->oobsize) {
e45048a6	75	pr_err("error: read oob failed at "
72091b68 AB	76	"%#llx\n", (long long)addr);
	77	if (!err)
	78	err = ret;
	79	if (!err)
	80	err = -EINVAL;
	81	}
	82	oobbuf += mtd->oobsize;
	83	}
	84	addr += pgsize;
	85	buf += pgsize;
	86	}
	87
	88	return err;
	89	}
	90
	91	static void dump_eraseblock(int ebnum)
	92	{
	93	int i, j, n;
	94	char line[128];
	95	int pg, oob;
	96
e45048a6	97	pr_info("dumping eraseblock %d\n", ebnum);
72091b68 AB	98	n = mtd->erasesize;
	99	for (i = 0; i < n;) {
	100	char *p = line;
	101
	102	p += sprintf(p, "%05x: ", i);
	103	for (j = 0; j < 32 && i < n; j++, i++)
	104	p += sprintf(p, "%02x", (unsigned int)iobuf[i]);
	105	printk(KERN_CRIT "%s\n", line);
	106	cond_resched();
	107	}
	108	if (!mtd->oobsize)
	109	return;
e45048a6	110	pr_info("dumping oob from eraseblock %d\n", ebnum);
72091b68 AB	111	n = mtd->oobsize;
	112	for (pg = 0, i = 0; pg < pgcnt; pg++)
	113	for (oob = 0; oob < n;) {
	114	char *p = line;
	115
	116	p += sprintf(p, "%05x: ", i);
	117	for (j = 0; j < 32 && oob < n; j++, oob++, i++)
	118	p += sprintf(p, "%02x",
	119	(unsigned int)iobuf1[i]);
	120	printk(KERN_CRIT "%s\n", line);
	121	cond_resched();
	122	}
	123	}
	124
72091b68 AB	125	static int __init mtd_readtest_init(void)
	126	{
	127	uint64_t tmp;
	128	int err, i;
	129
	130	printk(KERN_INFO "\n");
	131	printk(KERN_INFO "=================================================\n");
7406060e WS	132
7406060e WS	133	if (dev < 0) {
064a7694	134	pr_info("Please specify a valid mtd-device via module parameter\n");
7406060e WS	135	return -EINVAL;
	136	}
	137
e45048a6	138	pr_info("MTD device: %d\n", dev);
72091b68 AB	139
	140	mtd = get_mtd_device(NULL, dev);
	141	if (IS_ERR(mtd)) {
	142	err = PTR_ERR(mtd);
e45048a6	143	pr_err("error: Cannot get MTD device\n");
72091b68 AB	144	return err;
	145	}
	146
	147	if (mtd->writesize == 1) {
e45048a6	148	pr_info("not NAND flash, assume page size is 512 "
72091b68 AB	149	"bytes.\n");
	150	pgsize = 512;
	151	} else
	152	pgsize = mtd->writesize;
	153
	154	tmp = mtd->size;
	155	do_div(tmp, mtd->erasesize);
	156	ebcnt = tmp;
f5e2bae0	157	pgcnt = mtd->erasesize / pgsize;
72091b68	158
e45048a6	159	pr_info("MTD device size %llu, eraseblock size %u, "
72091b68 AB	160	"page size %u, count of eraseblocks %u, pages per "
	161	"eraseblock %u, OOB size %u\n",
	162	(unsigned long long)mtd->size, mtd->erasesize,
	163	pgsize, ebcnt, pgcnt, mtd->oobsize);
	164
	165	err = -ENOMEM;
	166	iobuf = kmalloc(mtd->erasesize, GFP_KERNEL);
33777e66	167	if (!iobuf)
72091b68	168	goto out;
72091b68	169	iobuf1 = kmalloc(mtd->erasesize, GFP_KERNEL);
33777e66	170	if (!iobuf1)
72091b68	171	goto out;
72091b68	172
bf9c2236 AM	173	bbt = kzalloc(ebcnt, GFP_KERNEL);
	174	if (!bbt)
	175	goto out;
	176	err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt);
72091b68 AB	177	if (err)
	178	goto out;
	179
	180	/* Read all eraseblocks 1 page at a time */
e45048a6	181	pr_info("testing page read\n");
72091b68 AB	182	for (i = 0; i < ebcnt; ++i) {
	183	int ret;
	184
	185	if (bbt[i])
	186	continue;
	187	ret = read_eraseblock_by_page(i);
	188	if (ret) {
	189	dump_eraseblock(i);
	190	if (!err)
	191	err = ret;
	192	}
2a6a28e7	193
db7c7274 BN	194	ret = mtdtest_relax();
	195	if (ret) {
	196	err = ret;
2a6a28e7	197	goto out;
db7c7274	198	}
72091b68 AB	199	}
	200
	201	if (err)
e45048a6	202	pr_info("finished with errors\n");
72091b68	203	else
e45048a6	204	pr_info("finished\n");
72091b68 AB	205
	206	out:
	207
	208	kfree(iobuf);
	209	kfree(iobuf1);
	210	kfree(bbt);
	211	put_mtd_device(mtd);
	212	if (err)
e45048a6	213	pr_info("error %d occurred\n", err);
72091b68 AB	214	printk(KERN_INFO "=================================================\n");
	215	return err;
	216	}
	217	module_init(mtd_readtest_init);
	218
	219	static void __exit mtd_readtest_exit(void)
	220	{
	221	return;
	222	}
	223	module_exit(mtd_readtest_exit);
	224
	225	MODULE_DESCRIPTION("Read test module");
	226	MODULE_AUTHOR("Adrian Hunter");
	227	MODULE_LICENSE("GPL");