[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 <[email protected]>
 */

#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.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;
	}

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