[linux-2.6-block.git] / drivers / mtd / tests / speedtest.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2007 Nokia Corporation
 *
 * 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.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
4cd10358	1	// SPDX-License-Identifier: GPL-2.0-only
72069be9 AB	2	/*
	3	* Copyright (C) 2007 Nokia Corporation
	4	*
72069be9 AB	5	* Test read and write speed of a MTD device.
72069be9 AB	6	*
fc7fe769	7	* Author: Adrian Hunter <adrian.hunter@nokia.com>
72069be9 AB	8	*/
72069be9 AB	9
2c70d292 VN	10	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
2c70d292 VN	11
72069be9	12	#include <linux/init.h>
af30c0a0	13	#include <linux/ktime.h>
72069be9 AB	14	#include <linux/module.h>
	15	#include <linux/moduleparam.h>
	16	#include <linux/err.h>
	17	#include <linux/mtd/mtd.h>
5a0e3ad6	18	#include <linux/slab.h>
72069be9	19	#include <linux/sched.h>
bfea1d4e	20	#include <linux/random.h>
72069be9	21
59b0816d AM	22	#include "mtd_test.h"
59b0816d AM	23
7406060e	24	static int dev = -EINVAL;
72069be9 AB	25	module_param(dev, int, S_IRUGO);
	26	MODULE_PARM_DESC(dev, "MTD device number to use");
	27
fc7fe769 AH	28	static int count;
	29	module_param(count, int, S_IRUGO);
	30	MODULE_PARM_DESC(count, "Maximum number of eraseblocks to use "
	31	"(0 means use all)");
	32
72069be9 AB	33	static struct mtd_info *mtd;
	34	static unsigned char *iobuf;
	35	static unsigned char *bbt;
	36
	37	static int pgsize;
	38	static int ebcnt;
	39	static int pgcnt;
	40	static int goodebcnt;
af30c0a0	41	static ktime_t start, finish;
72069be9	42
4085bcc6 RT	43	static int multiblock_erase(int ebnum, int blocks)
	44	{
	45	int err;
	46	struct erase_info ei;
1001ff7a	47	loff_t addr = (loff_t)ebnum * mtd->erasesize;
4085bcc6 RT	48
4085bcc6 RT	49	memset(&ei, 0, sizeof(struct erase_info));
4085bcc6 RT	50	ei.addr = addr;
	51	ei.len = mtd->erasesize * blocks;
	52
7e1f0dc0	53	err = mtd_erase(mtd, &ei);
4085bcc6	54	if (err) {
2c70d292	55	pr_err("error %d while erasing EB %d, blocks %d\n",
4085bcc6 RT	56	err, ebnum, blocks);
	57	return err;
	58	}
	59
4085bcc6 RT	60	return 0;
	61	}
	62
72069be9 AB	63	static int write_eraseblock(int ebnum)
72069be9 AB	64	{
1001ff7a	65	loff_t addr = (loff_t)ebnum * mtd->erasesize;
72069be9	66
8a9f4aa3	67	return mtdtest_write(mtd, addr, mtd->erasesize, iobuf);
72069be9 AB	68	}
	69
	70	static int write_eraseblock_by_page(int ebnum)
	71	{
72069be9	72	int i, err = 0;
1001ff7a	73	loff_t addr = (loff_t)ebnum * mtd->erasesize;
72069be9 AB	74	void *buf = iobuf;
	75
	76	for (i = 0; i < pgcnt; i++) {
59b0816d	77	err = mtdtest_write(mtd, addr, pgsize, buf);
8a9f4aa3	78	if (err)
72069be9	79	break;
72069be9 AB	80	addr += pgsize;
	81	buf += pgsize;
	82	}
	83
	84	return err;
	85	}
	86
	87	static int write_eraseblock_by_2pages(int ebnum)
	88	{
59b0816d	89	size_t sz = pgsize * 2;
72069be9	90	int i, n = pgcnt / 2, err = 0;
1001ff7a	91	loff_t addr = (loff_t)ebnum * mtd->erasesize;
72069be9 AB	92	void *buf = iobuf;
	93
	94	for (i = 0; i < n; i++) {
59b0816d	95	err = mtdtest_write(mtd, addr, sz, buf);
8a9f4aa3	96	if (err)
72069be9	97	return err;
72069be9 AB	98	addr += sz;
	99	buf += sz;
	100	}
8a9f4aa3	101	if (pgcnt % 2)
59b0816d	102	err = mtdtest_write(mtd, addr, pgsize, buf);
72069be9 AB	103
	104	return err;
	105	}
	106
	107	static int read_eraseblock(int ebnum)
	108	{
1001ff7a	109	loff_t addr = (loff_t)ebnum * mtd->erasesize;
72069be9	110
abc173ad	111	return mtdtest_read(mtd, addr, mtd->erasesize, iobuf);
72069be9 AB	112	}
	113
	114	static int read_eraseblock_by_page(int ebnum)
	115	{
72069be9	116	int i, err = 0;
1001ff7a	117	loff_t addr = (loff_t)ebnum * mtd->erasesize;
72069be9 AB	118	void *buf = iobuf;
	119
	120	for (i = 0; i < pgcnt; i++) {
59b0816d	121	err = mtdtest_read(mtd, addr, pgsize, buf);
abc173ad	122	if (err)
72069be9	123	break;
72069be9 AB	124	addr += pgsize;
	125	buf += pgsize;
	126	}
	127
	128	return err;
	129	}
	130
	131	static int read_eraseblock_by_2pages(int ebnum)
	132	{
59b0816d	133	size_t sz = pgsize * 2;
72069be9	134	int i, n = pgcnt / 2, err = 0;
1001ff7a	135	loff_t addr = (loff_t)ebnum * mtd->erasesize;
72069be9 AB	136	void *buf = iobuf;
	137
	138	for (i = 0; i < n; i++) {
59b0816d	139	err = mtdtest_read(mtd, addr, sz, buf);
abc173ad	140	if (err)
72069be9	141	return err;
72069be9 AB	142	addr += sz;
	143	buf += sz;
	144	}
abc173ad	145	if (pgcnt % 2)
59b0816d	146	err = mtdtest_read(mtd, addr, pgsize, buf);
72069be9 AB	147
	148	return err;
	149	}
	150
72069be9 AB	151	static inline void start_timing(void)
72069be9 AB	152	{
af30c0a0	153	start = ktime_get();
72069be9 AB	154	}
	155
	156	static inline void stop_timing(void)
	157	{
af30c0a0	158	finish = ktime_get();
72069be9 AB	159	}
	160
	161	static long calc_speed(void)
	162	{
e70727e4 DL	163	uint64_t k;
e70727e4 DL	164	long ms;
72069be9	165
af30c0a0	166	ms = ktime_ms_delta(finish, start);
e70727e4 DL	167	if (ms == 0)
e70727e4 DL	168	return 0;
b9da8bae	169	k = (uint64_t)goodebcnt * (mtd->erasesize / 1024) * 1000;
e70727e4 DL	170	do_div(k, ms);
e70727e4 DL	171	return k;
72069be9 AB	172	}
72069be9 AB	173
72069be9 AB	174	static int __init mtd_speedtest_init(void)
72069be9 AB	175	{
4085bcc6	176	int err, i, blocks, j, k;
72069be9 AB	177	long speed;
	178	uint64_t tmp;
	179
	180	printk(KERN_INFO "\n");
	181	printk(KERN_INFO "=================================================\n");
7406060e WS	182
7406060e WS	183	if (dev < 0) {
064a7694	184	pr_info("Please specify a valid mtd-device via module parameter\n");
2c70d292	185	pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
7406060e WS	186	return -EINVAL;
	187	}
	188
fc7fe769	189	if (count)
2c70d292	190	pr_info("MTD device: %d count: %d\n", dev, count);
fc7fe769	191	else
2c70d292	192	pr_info("MTD device: %d\n", dev);
72069be9 AB	193
	194	mtd = get_mtd_device(NULL, dev);
	195	if (IS_ERR(mtd)) {
	196	err = PTR_ERR(mtd);
2c70d292	197	pr_err("error: cannot get MTD device\n");
72069be9 AB	198	return err;
	199	}
	200
	201	if (mtd->writesize == 1) {
2c70d292	202	pr_info("not NAND flash, assume page size is 512 "
72069be9 AB	203	"bytes.\n");
	204	pgsize = 512;
	205	} else
	206	pgsize = mtd->writesize;
	207
	208	tmp = mtd->size;
	209	do_div(tmp, mtd->erasesize);
	210	ebcnt = tmp;
f5e2bae0	211	pgcnt = mtd->erasesize / pgsize;
72069be9	212
2c70d292	213	pr_info("MTD device size %llu, eraseblock size %u, "
72069be9 AB	214	"page size %u, count of eraseblocks %u, pages per "
	215	"eraseblock %u, OOB size %u\n",
	216	(unsigned long long)mtd->size, mtd->erasesize,
	217	pgsize, ebcnt, pgcnt, mtd->oobsize);
	218
fc7fe769 AH	219	if (count > 0 && count < ebcnt)
	220	ebcnt = count;
	221
72069be9 AB	222	err = -ENOMEM;
72069be9 AB	223	iobuf = kmalloc(mtd->erasesize, GFP_KERNEL);
33777e66	224	if (!iobuf)
72069be9	225	goto out;
72069be9	226
99672f32	227	prandom_bytes(iobuf, mtd->erasesize);
72069be9	228
59b0816d AM	229	bbt = kzalloc(ebcnt, GFP_KERNEL);
	230	if (!bbt)
	231	goto out;
	232	err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt);
72069be9 AB	233	if (err)
72069be9 AB	234	goto out;
59b0816d AM	235	for (i = 0; i < ebcnt; i++) {
	236	if (!bbt[i])
	237	goodebcnt++;
	238	}
72069be9	239
59b0816d	240	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
72069be9 AB	241	if (err)
	242	goto out;
	243
	244	/* Write all eraseblocks, 1 eraseblock at a time */
2c70d292	245	pr_info("testing eraseblock write speed\n");
72069be9 AB	246	start_timing();
	247	for (i = 0; i < ebcnt; ++i) {
	248	if (bbt[i])
	249	continue;
	250	err = write_eraseblock(i);
	251	if (err)
	252	goto out;
2a6a28e7 RW	253
	254	err = mtdtest_relax();
	255	if (err)
	256	goto out;
72069be9 AB	257	}
	258	stop_timing();
	259	speed = calc_speed();
2c70d292	260	pr_info("eraseblock write speed is %ld KiB/s\n", speed);
72069be9 AB	261
72069be9 AB	262	/* Read all eraseblocks, 1 eraseblock at a time */
2c70d292	263	pr_info("testing eraseblock read speed\n");
72069be9 AB	264	start_timing();
	265	for (i = 0; i < ebcnt; ++i) {
	266	if (bbt[i])
	267	continue;
	268	err = read_eraseblock(i);
	269	if (err)
	270	goto out;
2a6a28e7 RW	271
	272	err = mtdtest_relax();
	273	if (err)
	274	goto out;
72069be9 AB	275	}
	276	stop_timing();
	277	speed = calc_speed();
2c70d292	278	pr_info("eraseblock read speed is %ld KiB/s\n", speed);
72069be9	279
59b0816d	280	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
72069be9 AB	281	if (err)
	282	goto out;
	283
	284	/* Write all eraseblocks, 1 page at a time */
2c70d292	285	pr_info("testing page write speed\n");
72069be9 AB	286	start_timing();
	287	for (i = 0; i < ebcnt; ++i) {
	288	if (bbt[i])
	289	continue;
	290	err = write_eraseblock_by_page(i);
	291	if (err)
	292	goto out;
2a6a28e7 RW	293
	294	err = mtdtest_relax();
	295	if (err)
	296	goto out;
72069be9 AB	297	}
	298	stop_timing();
	299	speed = calc_speed();
2c70d292	300	pr_info("page write speed is %ld KiB/s\n", speed);
72069be9 AB	301
72069be9 AB	302	/* Read all eraseblocks, 1 page at a time */
2c70d292	303	pr_info("testing page read speed\n");
72069be9 AB	304	start_timing();
	305	for (i = 0; i < ebcnt; ++i) {
	306	if (bbt[i])
	307	continue;
	308	err = read_eraseblock_by_page(i);
	309	if (err)
	310	goto out;
2a6a28e7 RW	311
	312	err = mtdtest_relax();
	313	if (err)
	314	goto out;
72069be9 AB	315	}
	316	stop_timing();
	317	speed = calc_speed();
2c70d292	318	pr_info("page read speed is %ld KiB/s\n", speed);
72069be9	319
59b0816d	320	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
72069be9 AB	321	if (err)
	322	goto out;
	323
	324	/* Write all eraseblocks, 2 pages at a time */
2c70d292	325	pr_info("testing 2 page write speed\n");
72069be9 AB	326	start_timing();
	327	for (i = 0; i < ebcnt; ++i) {
	328	if (bbt[i])
	329	continue;
	330	err = write_eraseblock_by_2pages(i);
	331	if (err)
	332	goto out;
2a6a28e7 RW	333
	334	err = mtdtest_relax();
	335	if (err)
	336	goto out;
72069be9 AB	337	}
	338	stop_timing();
	339	speed = calc_speed();
2c70d292	340	pr_info("2 page write speed is %ld KiB/s\n", speed);
72069be9 AB	341
72069be9 AB	342	/* Read all eraseblocks, 2 pages at a time */
2c70d292	343	pr_info("testing 2 page read speed\n");
72069be9 AB	344	start_timing();
	345	for (i = 0; i < ebcnt; ++i) {
	346	if (bbt[i])
	347	continue;
	348	err = read_eraseblock_by_2pages(i);
	349	if (err)
	350	goto out;
2a6a28e7 RW	351
	352	err = mtdtest_relax();
	353	if (err)
	354	goto out;
72069be9 AB	355	}
	356	stop_timing();
	357	speed = calc_speed();
2c70d292	358	pr_info("2 page read speed is %ld KiB/s\n", speed);
72069be9 AB	359
72069be9 AB	360	/* Erase all eraseblocks */
2c70d292	361	pr_info("Testing erase speed\n");
72069be9	362	start_timing();
59b0816d AM	363	err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
	364	if (err)
	365	goto out;
72069be9 AB	366	stop_timing();
72069be9 AB	367	speed = calc_speed();
2c70d292	368	pr_info("erase speed is %ld KiB/s\n", speed);
72069be9	369
4085bcc6 RT	370	/* Multi-block erase all eraseblocks */
	371	for (k = 1; k < 7; k++) {
	372	blocks = 1 << k;
2c70d292	373	pr_info("Testing %dx multi-block erase speed\n",
4085bcc6 RT	374	blocks);
	375	start_timing();
	376	for (i = 0; i < ebcnt; ) {
	377	for (j = 0; j < blocks && (i + j) < ebcnt; j++)
	378	if (bbt[i + j])
	379	break;
	380	if (j < 1) {
	381	i++;
	382	continue;
	383	}
	384	err = multiblock_erase(i, j);
	385	if (err)
	386	goto out;
2a6a28e7 RW	387
	388	err = mtdtest_relax();
	389	if (err)
	390	goto out;
	391
4085bcc6 RT	392	i += j;
	393	}
	394	stop_timing();
	395	speed = calc_speed();
2c70d292	396	pr_info("%dx multi-block erase speed is %ld KiB/s\n",
4085bcc6 RT	397	blocks, speed);
4085bcc6 RT	398	}
2c70d292	399	pr_info("finished\n");
72069be9 AB	400	out:
	401	kfree(iobuf);
	402	kfree(bbt);
	403	put_mtd_device(mtd);
	404	if (err)
2c70d292	405	pr_info("error %d occurred\n", err);
72069be9 AB	406	printk(KERN_INFO "=================================================\n");
	407	return err;
	408	}
	409	module_init(mtd_speedtest_init);
	410
	411	static void __exit mtd_speedtest_exit(void)
	412	{
	413	return;
	414	}
	415	module_exit(mtd_speedtest_exit);
	416
	417	MODULE_DESCRIPTION("Speed test module");
	418	MODULE_AUTHOR("Adrian Hunter");
	419	MODULE_LICENSE("GPL");