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

/*
 * Copyright (C) 2007 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 read and write speed of a MTD device.
 *
 * Author: Adrian Hunter <adrian.hunter@nokia.com>
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/init.h>
#include <linux/ktime.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 int count;
module_param(count, int, S_IRUGO);
MODULE_PARM_DESC(count, "Maximum number of eraseblocks to use "
			"(0 means use all)");

static struct mtd_info *mtd;
static unsigned char *iobuf;
static unsigned char *bbt;

static int pgsize;
static int ebcnt;
static int pgcnt;
static int goodebcnt;
static ktime_t start, finish;

static int multiblock_erase(int ebnum, int blocks)
{
	int err;
	struct erase_info ei;
	loff_t addr = (loff_t)ebnum * mtd->erasesize;

	memset(&ei, 0, sizeof(struct erase_info));
	ei.mtd  = mtd;
	ei.addr = addr;
	ei.len  = mtd->erasesize * blocks;

	err = mtd_erase(mtd, &ei);
	if (err) {
		pr_err("error %d while erasing EB %d, blocks %d\n",
		       err, ebnum, blocks);
		return err;
	}

	if (ei.state == MTD_ERASE_FAILED) {
		pr_err("some erase error occurred at EB %d,"
		       "blocks %d\n", ebnum, blocks);
		return -EIO;
	}

	return 0;
}

static int write_eraseblock(int ebnum)
{
	loff_t addr = (loff_t)ebnum * mtd->erasesize;

	return mtdtest_write(mtd, addr, mtd->erasesize, iobuf);
}

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

	for (i = 0; i < pgcnt; i++) {
		err = mtdtest_write(mtd, addr, pgsize, buf);
		if (err)
			break;
		addr += pgsize;
		buf += pgsize;
	}

	return err;
}

static int write_eraseblock_by_2pages(int ebnum)
{
	size_t sz = pgsize * 2;
	int i, n = pgcnt / 2, err = 0;
	loff_t addr = (loff_t)ebnum * mtd->erasesize;
	void *buf = iobuf;

	for (i = 0; i < n; i++) {
		err = mtdtest_write(mtd, addr, sz, buf);
		if (err)
			return err;
		addr += sz;
		buf += sz;
	}
	if (pgcnt % 2)
		err = mtdtest_write(mtd, addr, pgsize, buf);

	return err;
}

static int read_eraseblock(int ebnum)
{
	loff_t addr = (loff_t)ebnum * mtd->erasesize;

	return mtdtest_read(mtd, addr, mtd->erasesize, iobuf);
}

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

	for (i = 0; i < pgcnt; i++) {
		err = mtdtest_read(mtd, addr, pgsize, buf);
		if (err)
			break;
		addr += pgsize;
		buf += pgsize;
	}

	return err;
}

static int read_eraseblock_by_2pages(int ebnum)
{
	size_t sz = pgsize * 2;
	int i, n = pgcnt / 2, err = 0;
	loff_t addr = (loff_t)ebnum * mtd->erasesize;
	void *buf = iobuf;

	for (i = 0; i < n; i++) {
		err = mtdtest_read(mtd, addr, sz, buf);
		if (err)
			return err;
		addr += sz;
		buf += sz;
	}
	if (pgcnt % 2)
		err = mtdtest_read(mtd, addr, pgsize, buf);

	return err;
}

static inline void start_timing(void)
{
	start = ktime_get();
}

static inline void stop_timing(void)
{
	finish = ktime_get();
}

static long calc_speed(void)
{
	uint64_t k;
	long ms;

	ms = ktime_ms_delta(finish, start);
	if (ms == 0)
		return 0;
	k = (uint64_t)goodebcnt * (mtd->erasesize / 1024) * 1000;
	do_div(k, ms);
	return k;
}

static int __init mtd_speedtest_init(void)
{
	int err, i, blocks, j, k;
	long speed;
	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;
	}

	if (count)
		pr_info("MTD device: %d    count: %d\n", dev, count);
	else
		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);

	if (count > 0 && count < ebcnt)
		ebcnt = count;

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

	prandom_bytes(iobuf, mtd->erasesize);

	bbt = kzalloc(ebcnt, GFP_KERNEL);
	if (!bbt)
		goto out;
	err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt);
	if (err)
		goto out;
	for (i = 0; i < ebcnt; i++) {
		if (!bbt[i])
			goodebcnt++;
	}

	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
	if (err)
		goto out;

	/* Write all eraseblocks, 1 eraseblock at a time */
	pr_info("testing eraseblock write speed\n");
	start_timing();
	for (i = 0; i < ebcnt; ++i) {
		if (bbt[i])
			continue;
		err = write_eraseblock(i);
		if (err)
			goto out;

		err = mtdtest_relax();
		if (err)
			goto out;
	}
	stop_timing();
	speed = calc_speed();
	pr_info("eraseblock write speed is %ld KiB/s\n", speed);

	/* Read all eraseblocks, 1 eraseblock at a time */
	pr_info("testing eraseblock read speed\n");
	start_timing();
	for (i = 0; i < ebcnt; ++i) {
		if (bbt[i])
			continue;
		err = read_eraseblock(i);
		if (err)
			goto out;

		err = mtdtest_relax();
		if (err)
			goto out;
	}
	stop_timing();
	speed = calc_speed();
	pr_info("eraseblock read speed is %ld KiB/s\n", speed);

	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
	if (err)
		goto out;

	/* Write all eraseblocks, 1 page at a time */
	pr_info("testing page write speed\n");
	start_timing();
	for (i = 0; i < ebcnt; ++i) {
		if (bbt[i])
			continue;
		err = write_eraseblock_by_page(i);
		if (err)
			goto out;

		err = mtdtest_relax();
		if (err)
			goto out;
	}
	stop_timing();
	speed = calc_speed();
	pr_info("page write speed is %ld KiB/s\n", speed);

	/* Read all eraseblocks, 1 page at a time */
	pr_info("testing page read speed\n");
	start_timing();
	for (i = 0; i < ebcnt; ++i) {
		if (bbt[i])
			continue;
		err = read_eraseblock_by_page(i);
		if (err)
			goto out;

		err = mtdtest_relax();
		if (err)
			goto out;
	}
	stop_timing();
	speed = calc_speed();
	pr_info("page read speed is %ld KiB/s\n", speed);

	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
	if (err)
		goto out;

	/* Write all eraseblocks, 2 pages at a time */
	pr_info("testing 2 page write speed\n");
	start_timing();
	for (i = 0; i < ebcnt; ++i) {
		if (bbt[i])
			continue;
		err = write_eraseblock_by_2pages(i);
		if (err)
			goto out;

		err = mtdtest_relax();
		if (err)
			goto out;
	}
	stop_timing();
	speed = calc_speed();
	pr_info("2 page write speed is %ld KiB/s\n", speed);

	/* Read all eraseblocks, 2 pages at a time */
	pr_info("testing 2 page read speed\n");
	start_timing();
	for (i = 0; i < ebcnt; ++i) {
		if (bbt[i])
			continue;
		err = read_eraseblock_by_2pages(i);
		if (err)
			goto out;

		err = mtdtest_relax();
		if (err)
			goto out;
	}
	stop_timing();
	speed = calc_speed();
	pr_info("2 page read speed is %ld KiB/s\n", speed);

	/* Erase all eraseblocks */
	pr_info("Testing erase speed\n");
	start_timing();
	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
	if (err)
		goto out;
	stop_timing();
	speed = calc_speed();
	pr_info("erase speed is %ld KiB/s\n", speed);

	/* Multi-block erase all eraseblocks */
	for (k = 1; k < 7; k++) {
		blocks = 1 << k;
		pr_info("Testing %dx multi-block erase speed\n",
		       blocks);
		start_timing();
		for (i = 0; i < ebcnt; ) {
			for (j = 0; j < blocks && (i + j) < ebcnt; j++)
				if (bbt[i + j])
					break;
			if (j < 1) {
				i++;
				continue;
			}
			err = multiblock_erase(i, j);
			if (err)
				goto out;

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

			i += j;
		}
		stop_timing();
		speed = calc_speed();
		pr_info("%dx multi-block erase speed is %ld KiB/s\n",
		       blocks, speed);
	}
	pr_info("finished\n");
out:
	kfree(iobuf);
	kfree(bbt);
	put_mtd_device(mtd);
	if (err)
		pr_info("error %d occurred\n", err);
	printk(KERN_INFO "=================================================\n");
	return err;
}
module_init(mtd_speedtest_init);

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

MODULE_DESCRIPTION("Speed test module");
MODULE_AUTHOR("Adrian Hunter");
MODULE_LICENSE("GPL");
Commit	Line	Data
72069be9 AB	1	/*
	2	* Copyright (C) 2007 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 read and write speed of a MTD device.
	18	*
fc7fe769	19	* Author: Adrian Hunter <adrian.hunter@nokia.com>
72069be9 AB	20	*/
72069be9 AB	21
2c70d292 VN	22	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
2c70d292 VN	23
72069be9	24	#include <linux/init.h>
af30c0a0	25	#include <linux/ktime.h>
72069be9 AB	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>
72069be9	31	#include <linux/sched.h>
bfea1d4e	32	#include <linux/random.h>
72069be9	33
59b0816d AM	34	#include "mtd_test.h"
59b0816d AM	35
7406060e	36	static int dev = -EINVAL;
72069be9 AB	37	module_param(dev, int, S_IRUGO);
	38	MODULE_PARM_DESC(dev, "MTD device number to use");
	39
fc7fe769 AH	40	static int count;
	41	module_param(count, int, S_IRUGO);
	42	MODULE_PARM_DESC(count, "Maximum number of eraseblocks to use "
	43	"(0 means use all)");
	44
72069be9 AB	45	static struct mtd_info *mtd;
	46	static unsigned char *iobuf;
	47	static unsigned char *bbt;
	48
	49	static int pgsize;
	50	static int ebcnt;
	51	static int pgcnt;
	52	static int goodebcnt;
af30c0a0	53	static ktime_t start, finish;
72069be9	54
4085bcc6 RT	55	static int multiblock_erase(int ebnum, int blocks)
	56	{
	57	int err;
	58	struct erase_info ei;
1001ff7a	59	loff_t addr = (loff_t)ebnum * mtd->erasesize;
4085bcc6 RT	60
	61	memset(&ei, 0, sizeof(struct erase_info));
	62	ei.mtd = mtd;
	63	ei.addr = addr;
	64	ei.len = mtd->erasesize * blocks;
	65
7e1f0dc0	66	err = mtd_erase(mtd, &ei);
4085bcc6	67	if (err) {
2c70d292	68	pr_err("error %d while erasing EB %d, blocks %d\n",
4085bcc6 RT	69	err, ebnum, blocks);
	70	return err;
	71	}
	72
	73	if (ei.state == MTD_ERASE_FAILED) {
2c70d292	74	pr_err("some erase error occurred at EB %d,"
4085bcc6 RT	75	"blocks %d\n", ebnum, blocks);
	76	return -EIO;
	77	}
	78
	79	return 0;
	80	}
	81
72069be9 AB	82	static int write_eraseblock(int ebnum)
72069be9 AB	83	{
1001ff7a	84	loff_t addr = (loff_t)ebnum * mtd->erasesize;
72069be9	85
8a9f4aa3	86	return mtdtest_write(mtd, addr, mtd->erasesize, iobuf);
72069be9 AB	87	}
	88
	89	static int write_eraseblock_by_page(int ebnum)
	90	{
72069be9	91	int i, err = 0;
1001ff7a	92	loff_t addr = (loff_t)ebnum * mtd->erasesize;
72069be9 AB	93	void *buf = iobuf;
	94
	95	for (i = 0; i < pgcnt; i++) {
59b0816d	96	err = mtdtest_write(mtd, addr, pgsize, buf);
8a9f4aa3	97	if (err)
72069be9	98	break;
72069be9 AB	99	addr += pgsize;
	100	buf += pgsize;
	101	}
	102
	103	return err;
	104	}
	105
	106	static int write_eraseblock_by_2pages(int ebnum)
	107	{
59b0816d	108	size_t sz = pgsize * 2;
72069be9	109	int i, n = pgcnt / 2, err = 0;
1001ff7a	110	loff_t addr = (loff_t)ebnum * mtd->erasesize;
72069be9 AB	111	void *buf = iobuf;
	112
	113	for (i = 0; i < n; i++) {
59b0816d	114	err = mtdtest_write(mtd, addr, sz, buf);
8a9f4aa3	115	if (err)
72069be9	116	return err;
72069be9 AB	117	addr += sz;
	118	buf += sz;
	119	}
8a9f4aa3	120	if (pgcnt % 2)
59b0816d	121	err = mtdtest_write(mtd, addr, pgsize, buf);
72069be9 AB	122
	123	return err;
	124	}
	125
	126	static int read_eraseblock(int ebnum)
	127	{
1001ff7a	128	loff_t addr = (loff_t)ebnum * mtd->erasesize;
72069be9	129
abc173ad	130	return mtdtest_read(mtd, addr, mtd->erasesize, iobuf);
72069be9 AB	131	}
	132
	133	static int read_eraseblock_by_page(int ebnum)
	134	{
72069be9	135	int i, err = 0;
1001ff7a	136	loff_t addr = (loff_t)ebnum * mtd->erasesize;
72069be9 AB	137	void *buf = iobuf;
	138
	139	for (i = 0; i < pgcnt; i++) {
59b0816d	140	err = mtdtest_read(mtd, addr, pgsize, buf);
abc173ad	141	if (err)
72069be9	142	break;
72069be9 AB	143	addr += pgsize;
	144	buf += pgsize;
	145	}
	146
	147	return err;
	148	}
	149
	150	static int read_eraseblock_by_2pages(int ebnum)
	151	{
59b0816d	152	size_t sz = pgsize * 2;
72069be9	153	int i, n = pgcnt / 2, err = 0;
1001ff7a	154	loff_t addr = (loff_t)ebnum * mtd->erasesize;
72069be9 AB	155	void *buf = iobuf;
	156
	157	for (i = 0; i < n; i++) {
59b0816d	158	err = mtdtest_read(mtd, addr, sz, buf);
abc173ad	159	if (err)
72069be9	160	return err;
72069be9 AB	161	addr += sz;
	162	buf += sz;
	163	}
abc173ad	164	if (pgcnt % 2)
59b0816d	165	err = mtdtest_read(mtd, addr, pgsize, buf);
72069be9 AB	166
	167	return err;
	168	}
	169
72069be9 AB	170	static inline void start_timing(void)
72069be9 AB	171	{
af30c0a0	172	start = ktime_get();
72069be9 AB	173	}
	174
	175	static inline void stop_timing(void)
	176	{
af30c0a0	177	finish = ktime_get();
72069be9 AB	178	}
	179
	180	static long calc_speed(void)
	181	{
e70727e4 DL	182	uint64_t k;
e70727e4 DL	183	long ms;
72069be9	184
af30c0a0	185	ms = ktime_ms_delta(finish, start);
e70727e4 DL	186	if (ms == 0)
e70727e4 DL	187	return 0;
b9da8bae	188	k = (uint64_t)goodebcnt * (mtd->erasesize / 1024) * 1000;
e70727e4 DL	189	do_div(k, ms);
e70727e4 DL	190	return k;
72069be9 AB	191	}
72069be9 AB	192
72069be9 AB	193	static int __init mtd_speedtest_init(void)
72069be9 AB	194	{
4085bcc6	195	int err, i, blocks, j, k;
72069be9 AB	196	long speed;
	197	uint64_t tmp;
	198
	199	printk(KERN_INFO "\n");
	200	printk(KERN_INFO "=================================================\n");
7406060e WS	201
7406060e WS	202	if (dev < 0) {
064a7694	203	pr_info("Please specify a valid mtd-device via module parameter\n");
2c70d292	204	pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
7406060e WS	205	return -EINVAL;
	206	}
	207
fc7fe769	208	if (count)
2c70d292	209	pr_info("MTD device: %d count: %d\n", dev, count);
fc7fe769	210	else
2c70d292	211	pr_info("MTD device: %d\n", dev);
72069be9 AB	212
	213	mtd = get_mtd_device(NULL, dev);
	214	if (IS_ERR(mtd)) {
	215	err = PTR_ERR(mtd);
2c70d292	216	pr_err("error: cannot get MTD device\n");
72069be9 AB	217	return err;
	218	}
	219
	220	if (mtd->writesize == 1) {
2c70d292	221	pr_info("not NAND flash, assume page size is 512 "
72069be9 AB	222	"bytes.\n");
	223	pgsize = 512;
	224	} else
	225	pgsize = mtd->writesize;
	226
	227	tmp = mtd->size;
	228	do_div(tmp, mtd->erasesize);
	229	ebcnt = tmp;
f5e2bae0	230	pgcnt = mtd->erasesize / pgsize;
72069be9	231
2c70d292	232	pr_info("MTD device size %llu, eraseblock size %u, "
72069be9 AB	233	"page size %u, count of eraseblocks %u, pages per "
	234	"eraseblock %u, OOB size %u\n",
	235	(unsigned long long)mtd->size, mtd->erasesize,
	236	pgsize, ebcnt, pgcnt, mtd->oobsize);
	237
fc7fe769 AH	238	if (count > 0 && count < ebcnt)
	239	ebcnt = count;
	240
72069be9 AB	241	err = -ENOMEM;
72069be9 AB	242	iobuf = kmalloc(mtd->erasesize, GFP_KERNEL);
33777e66	243	if (!iobuf)
72069be9	244	goto out;
72069be9	245
99672f32	246	prandom_bytes(iobuf, mtd->erasesize);
72069be9	247
59b0816d AM	248	bbt = kzalloc(ebcnt, GFP_KERNEL);
	249	if (!bbt)
	250	goto out;
	251	err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt);
72069be9 AB	252	if (err)
72069be9 AB	253	goto out;
59b0816d AM	254	for (i = 0; i < ebcnt; i++) {
	255	if (!bbt[i])
	256	goodebcnt++;
	257	}
72069be9	258
59b0816d	259	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
72069be9 AB	260	if (err)
	261	goto out;
	262
	263	/* Write all eraseblocks, 1 eraseblock at a time */
2c70d292	264	pr_info("testing eraseblock write speed\n");
72069be9 AB	265	start_timing();
	266	for (i = 0; i < ebcnt; ++i) {
	267	if (bbt[i])
	268	continue;
	269	err = write_eraseblock(i);
	270	if (err)
	271	goto out;
2a6a28e7 RW	272
	273	err = mtdtest_relax();
	274	if (err)
	275	goto out;
72069be9 AB	276	}
	277	stop_timing();
	278	speed = calc_speed();
2c70d292	279	pr_info("eraseblock write speed is %ld KiB/s\n", speed);
72069be9 AB	280
72069be9 AB	281	/* Read all eraseblocks, 1 eraseblock at a time */
2c70d292	282	pr_info("testing eraseblock read speed\n");
72069be9 AB	283	start_timing();
	284	for (i = 0; i < ebcnt; ++i) {
	285	if (bbt[i])
	286	continue;
	287	err = read_eraseblock(i);
	288	if (err)
	289	goto out;
2a6a28e7 RW	290
	291	err = mtdtest_relax();
	292	if (err)
	293	goto out;
72069be9 AB	294	}
	295	stop_timing();
	296	speed = calc_speed();
2c70d292	297	pr_info("eraseblock read speed is %ld KiB/s\n", speed);
72069be9	298
59b0816d	299	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
72069be9 AB	300	if (err)
	301	goto out;
	302
	303	/* Write all eraseblocks, 1 page at a time */
2c70d292	304	pr_info("testing page write speed\n");
72069be9 AB	305	start_timing();
	306	for (i = 0; i < ebcnt; ++i) {
	307	if (bbt[i])
	308	continue;
	309	err = write_eraseblock_by_page(i);
	310	if (err)
	311	goto out;
2a6a28e7 RW	312
	313	err = mtdtest_relax();
	314	if (err)
	315	goto out;
72069be9 AB	316	}
	317	stop_timing();
	318	speed = calc_speed();
2c70d292	319	pr_info("page write speed is %ld KiB/s\n", speed);
72069be9 AB	320
72069be9 AB	321	/* Read all eraseblocks, 1 page at a time */
2c70d292	322	pr_info("testing page read speed\n");
72069be9 AB	323	start_timing();
	324	for (i = 0; i < ebcnt; ++i) {
	325	if (bbt[i])
	326	continue;
	327	err = read_eraseblock_by_page(i);
	328	if (err)
	329	goto out;
2a6a28e7 RW	330
	331	err = mtdtest_relax();
	332	if (err)
	333	goto out;
72069be9 AB	334	}
	335	stop_timing();
	336	speed = calc_speed();
2c70d292	337	pr_info("page read speed is %ld KiB/s\n", speed);
72069be9	338
59b0816d	339	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
72069be9 AB	340	if (err)
	341	goto out;
	342
	343	/* Write all eraseblocks, 2 pages at a time */
2c70d292	344	pr_info("testing 2 page write speed\n");
72069be9 AB	345	start_timing();
	346	for (i = 0; i < ebcnt; ++i) {
	347	if (bbt[i])
	348	continue;
	349	err = write_eraseblock_by_2pages(i);
	350	if (err)
	351	goto out;
2a6a28e7 RW	352
	353	err = mtdtest_relax();
	354	if (err)
	355	goto out;
72069be9 AB	356	}
	357	stop_timing();
	358	speed = calc_speed();
2c70d292	359	pr_info("2 page write speed is %ld KiB/s\n", speed);
72069be9 AB	360
72069be9 AB	361	/* Read all eraseblocks, 2 pages at a time */
2c70d292	362	pr_info("testing 2 page read speed\n");
72069be9 AB	363	start_timing();
	364	for (i = 0; i < ebcnt; ++i) {
	365	if (bbt[i])
	366	continue;
	367	err = read_eraseblock_by_2pages(i);
	368	if (err)
	369	goto out;
2a6a28e7 RW	370
	371	err = mtdtest_relax();
	372	if (err)
	373	goto out;
72069be9 AB	374	}
	375	stop_timing();
	376	speed = calc_speed();
2c70d292	377	pr_info("2 page read speed is %ld KiB/s\n", speed);
72069be9 AB	378
72069be9 AB	379	/* Erase all eraseblocks */
2c70d292	380	pr_info("Testing erase speed\n");
72069be9	381	start_timing();
59b0816d AM	382	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
	383	if (err)
	384	goto out;
72069be9 AB	385	stop_timing();
72069be9 AB	386	speed = calc_speed();
2c70d292	387	pr_info("erase speed is %ld KiB/s\n", speed);
72069be9	388
4085bcc6 RT	389	/* Multi-block erase all eraseblocks */
	390	for (k = 1; k < 7; k++) {
	391	blocks = 1 << k;
2c70d292	392	pr_info("Testing %dx multi-block erase speed\n",
4085bcc6 RT	393	blocks);
	394	start_timing();
	395	for (i = 0; i < ebcnt; ) {
	396	for (j = 0; j < blocks && (i + j) < ebcnt; j++)
	397	if (bbt[i + j])
	398	break;
	399	if (j < 1) {
	400	i++;
	401	continue;
	402	}
	403	err = multiblock_erase(i, j);
	404	if (err)
	405	goto out;
2a6a28e7 RW	406
	407	err = mtdtest_relax();
	408	if (err)
	409	goto out;
	410
4085bcc6 RT	411	i += j;
	412	}
	413	stop_timing();
	414	speed = calc_speed();
2c70d292	415	pr_info("%dx multi-block erase speed is %ld KiB/s\n",
4085bcc6 RT	416	blocks, speed);
4085bcc6 RT	417	}
2c70d292	418	pr_info("finished\n");
72069be9 AB	419	out:
	420	kfree(iobuf);
	421	kfree(bbt);
	422	put_mtd_device(mtd);
	423	if (err)
2c70d292	424	pr_info("error %d occurred\n", err);
72069be9 AB	425	printk(KERN_INFO "=================================================\n");
	426	return err;
	427	}
	428	module_init(mtd_speedtest_init);
	429
	430	static void __exit mtd_speedtest_exit(void)
	431	{
	432	return;
	433	}
	434	module_exit(mtd_speedtest_exit);
	435
	436	MODULE_DESCRIPTION("Speed test module");
	437	MODULE_AUTHOR("Adrian Hunter");
	438	MODULE_LICENSE("GPL");