508 lines
11 KiB
C
508 lines
11 KiB
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 <ext-adrian.hunter@nokia.com>
|
|
*/
|
|
|
|
#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>
|
|
|
|
#define PRINT_PREF KERN_INFO "mtd_speedtest: "
|
|
|
|
static int dev;
|
|
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 *bbt;
|
|
|
|
static int pgsize;
|
|
static int ebcnt;
|
|
static int pgcnt;
|
|
static int goodebcnt;
|
|
static struct timeval start, finish;
|
|
static unsigned long next = 1;
|
|
|
|
static inline unsigned int simple_rand(void)
|
|
{
|
|
next = next * 1103515245 + 12345;
|
|
return (unsigned int)((next / 65536) % 32768);
|
|
}
|
|
|
|
static inline void simple_srand(unsigned long seed)
|
|
{
|
|
next = seed;
|
|
}
|
|
|
|
static void set_random_data(unsigned char *buf, size_t len)
|
|
{
|
|
size_t i;
|
|
|
|
for (i = 0; i < len; ++i)
|
|
buf[i] = simple_rand();
|
|
}
|
|
|
|
static int erase_eraseblock(int ebnum)
|
|
{
|
|
int err;
|
|
struct erase_info ei;
|
|
loff_t addr = ebnum * mtd->erasesize;
|
|
|
|
memset(&ei, 0, sizeof(struct erase_info));
|
|
ei.mtd = mtd;
|
|
ei.addr = addr;
|
|
ei.len = mtd->erasesize;
|
|
|
|
err = mtd->erase(mtd, &ei);
|
|
if (err) {
|
|
printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
|
|
return err;
|
|
}
|
|
|
|
if (ei.state == MTD_ERASE_FAILED) {
|
|
printk(PRINT_PREF "some erase error occurred at EB %d\n",
|
|
ebnum);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int erase_whole_device(void)
|
|
{
|
|
int err;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ebcnt; ++i) {
|
|
if (bbt[i])
|
|
continue;
|
|
err = erase_eraseblock(i);
|
|
if (err)
|
|
return err;
|
|
cond_resched();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int write_eraseblock(int ebnum)
|
|
{
|
|
size_t written = 0;
|
|
int err = 0;
|
|
loff_t addr = ebnum * mtd->erasesize;
|
|
|
|
err = mtd->write(mtd, addr, mtd->erasesize, &written, iobuf);
|
|
if (err || written != mtd->erasesize) {
|
|
printk(PRINT_PREF "error: write failed at %#llx\n", addr);
|
|
if (!err)
|
|
err = -EINVAL;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int write_eraseblock_by_page(int ebnum)
|
|
{
|
|
size_t written = 0;
|
|
int i, err = 0;
|
|
loff_t addr = ebnum * mtd->erasesize;
|
|
void *buf = iobuf;
|
|
|
|
for (i = 0; i < pgcnt; i++) {
|
|
err = mtd->write(mtd, addr, pgsize, &written, buf);
|
|
if (err || written != pgsize) {
|
|
printk(PRINT_PREF "error: write failed at %#llx\n",
|
|
addr);
|
|
if (!err)
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
addr += pgsize;
|
|
buf += pgsize;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int write_eraseblock_by_2pages(int ebnum)
|
|
{
|
|
size_t written = 0, sz = pgsize * 2;
|
|
int i, n = pgcnt / 2, err = 0;
|
|
loff_t addr = ebnum * mtd->erasesize;
|
|
void *buf = iobuf;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
err = mtd->write(mtd, addr, sz, &written, buf);
|
|
if (err || written != sz) {
|
|
printk(PRINT_PREF "error: write failed at %#llx\n",
|
|
addr);
|
|
if (!err)
|
|
err = -EINVAL;
|
|
return err;
|
|
}
|
|
addr += sz;
|
|
buf += sz;
|
|
}
|
|
if (pgcnt % 2) {
|
|
err = mtd->write(mtd, addr, pgsize, &written, buf);
|
|
if (err || written != pgsize) {
|
|
printk(PRINT_PREF "error: write failed at %#llx\n",
|
|
addr);
|
|
if (!err)
|
|
err = -EINVAL;
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int read_eraseblock(int ebnum)
|
|
{
|
|
size_t read = 0;
|
|
int err = 0;
|
|
loff_t addr = ebnum * mtd->erasesize;
|
|
|
|
err = mtd->read(mtd, addr, mtd->erasesize, &read, iobuf);
|
|
/* Ignore corrected ECC errors */
|
|
if (err == -EUCLEAN)
|
|
err = 0;
|
|
if (err || read != mtd->erasesize) {
|
|
printk(PRINT_PREF "error: read failed at %#llx\n", addr);
|
|
if (!err)
|
|
err = -EINVAL;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int read_eraseblock_by_page(int ebnum)
|
|
{
|
|
size_t read = 0;
|
|
int i, err = 0;
|
|
loff_t addr = ebnum * mtd->erasesize;
|
|
void *buf = iobuf;
|
|
|
|
for (i = 0; i < pgcnt; i++) {
|
|
err = mtd->read(mtd, addr, pgsize, &read, buf);
|
|
/* Ignore corrected ECC errors */
|
|
if (err == -EUCLEAN)
|
|
err = 0;
|
|
if (err || read != pgsize) {
|
|
printk(PRINT_PREF "error: read failed at %#llx\n",
|
|
addr);
|
|
if (!err)
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
addr += pgsize;
|
|
buf += pgsize;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int read_eraseblock_by_2pages(int ebnum)
|
|
{
|
|
size_t read = 0, sz = pgsize * 2;
|
|
int i, n = pgcnt / 2, err = 0;
|
|
loff_t addr = ebnum * mtd->erasesize;
|
|
void *buf = iobuf;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
err = mtd->read(mtd, addr, sz, &read, buf);
|
|
/* Ignore corrected ECC errors */
|
|
if (err == -EUCLEAN)
|
|
err = 0;
|
|
if (err || read != sz) {
|
|
printk(PRINT_PREF "error: read failed at %#llx\n",
|
|
addr);
|
|
if (!err)
|
|
err = -EINVAL;
|
|
return err;
|
|
}
|
|
addr += sz;
|
|
buf += sz;
|
|
}
|
|
if (pgcnt % 2) {
|
|
err = mtd->read(mtd, addr, pgsize, &read, buf);
|
|
/* Ignore corrected ECC errors */
|
|
if (err == -EUCLEAN)
|
|
err = 0;
|
|
if (err || read != pgsize) {
|
|
printk(PRINT_PREF "error: read failed at %#llx\n",
|
|
addr);
|
|
if (!err)
|
|
err = -EINVAL;
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int is_block_bad(int ebnum)
|
|
{
|
|
loff_t addr = ebnum * mtd->erasesize;
|
|
int ret;
|
|
|
|
ret = mtd->block_isbad(mtd, addr);
|
|
if (ret)
|
|
printk(PRINT_PREF "block %d is bad\n", ebnum);
|
|
return ret;
|
|
}
|
|
|
|
static inline void start_timing(void)
|
|
{
|
|
do_gettimeofday(&start);
|
|
}
|
|
|
|
static inline void stop_timing(void)
|
|
{
|
|
do_gettimeofday(&finish);
|
|
}
|
|
|
|
static long calc_speed(void)
|
|
{
|
|
long ms, k, speed;
|
|
|
|
ms = (finish.tv_sec - start.tv_sec) * 1000 +
|
|
(finish.tv_usec - start.tv_usec) / 1000;
|
|
k = goodebcnt * mtd->erasesize / 1024;
|
|
speed = (k * 1000) / ms;
|
|
return speed;
|
|
}
|
|
|
|
static int scan_for_bad_eraseblocks(void)
|
|
{
|
|
int i, bad = 0;
|
|
|
|
bbt = kzalloc(ebcnt, GFP_KERNEL);
|
|
if (!bbt) {
|
|
printk(PRINT_PREF "error: cannot allocate memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* NOR flash does not implement block_isbad */
|
|
if (mtd->block_isbad == NULL)
|
|
goto out;
|
|
|
|
printk(PRINT_PREF "scanning for bad eraseblocks\n");
|
|
for (i = 0; i < ebcnt; ++i) {
|
|
bbt[i] = is_block_bad(i) ? 1 : 0;
|
|
if (bbt[i])
|
|
bad += 1;
|
|
cond_resched();
|
|
}
|
|
printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad);
|
|
out:
|
|
goodebcnt = ebcnt - bad;
|
|
return 0;
|
|
}
|
|
|
|
static int __init mtd_speedtest_init(void)
|
|
{
|
|
int err, i;
|
|
long speed;
|
|
uint64_t tmp;
|
|
|
|
printk(KERN_INFO "\n");
|
|
printk(KERN_INFO "=================================================\n");
|
|
printk(PRINT_PREF "MTD device: %d\n", dev);
|
|
|
|
mtd = get_mtd_device(NULL, dev);
|
|
if (IS_ERR(mtd)) {
|
|
err = PTR_ERR(mtd);
|
|
printk(PRINT_PREF "error: cannot get MTD device\n");
|
|
return err;
|
|
}
|
|
|
|
if (mtd->writesize == 1) {
|
|
printk(PRINT_PREF "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;
|
|
|
|
printk(PRINT_PREF "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) {
|
|
printk(PRINT_PREF "error: cannot allocate memory\n");
|
|
goto out;
|
|
}
|
|
|
|
simple_srand(1);
|
|
set_random_data(iobuf, mtd->erasesize);
|
|
|
|
err = scan_for_bad_eraseblocks();
|
|
if (err)
|
|
goto out;
|
|
|
|
err = erase_whole_device();
|
|
if (err)
|
|
goto out;
|
|
|
|
/* Write all eraseblocks, 1 eraseblock at a time */
|
|
printk(PRINT_PREF "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;
|
|
cond_resched();
|
|
}
|
|
stop_timing();
|
|
speed = calc_speed();
|
|
printk(PRINT_PREF "eraseblock write speed is %ld KiB/s\n", speed);
|
|
|
|
/* Read all eraseblocks, 1 eraseblock at a time */
|
|
printk(PRINT_PREF "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;
|
|
cond_resched();
|
|
}
|
|
stop_timing();
|
|
speed = calc_speed();
|
|
printk(PRINT_PREF "eraseblock read speed is %ld KiB/s\n", speed);
|
|
|
|
err = erase_whole_device();
|
|
if (err)
|
|
goto out;
|
|
|
|
/* Write all eraseblocks, 1 page at a time */
|
|
printk(PRINT_PREF "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;
|
|
cond_resched();
|
|
}
|
|
stop_timing();
|
|
speed = calc_speed();
|
|
printk(PRINT_PREF "page write speed is %ld KiB/s\n", speed);
|
|
|
|
/* Read all eraseblocks, 1 page at a time */
|
|
printk(PRINT_PREF "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;
|
|
cond_resched();
|
|
}
|
|
stop_timing();
|
|
speed = calc_speed();
|
|
printk(PRINT_PREF "page read speed is %ld KiB/s\n", speed);
|
|
|
|
err = erase_whole_device();
|
|
if (err)
|
|
goto out;
|
|
|
|
/* Write all eraseblocks, 2 pages at a time */
|
|
printk(PRINT_PREF "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;
|
|
cond_resched();
|
|
}
|
|
stop_timing();
|
|
speed = calc_speed();
|
|
printk(PRINT_PREF "2 page write speed is %ld KiB/s\n", speed);
|
|
|
|
/* Read all eraseblocks, 2 pages at a time */
|
|
printk(PRINT_PREF "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;
|
|
cond_resched();
|
|
}
|
|
stop_timing();
|
|
speed = calc_speed();
|
|
printk(PRINT_PREF "2 page read speed is %ld KiB/s\n", speed);
|
|
|
|
/* Erase all eraseblocks */
|
|
printk(PRINT_PREF "Testing erase speed\n");
|
|
start_timing();
|
|
for (i = 0; i < ebcnt; ++i) {
|
|
if (bbt[i])
|
|
continue;
|
|
err = erase_eraseblock(i);
|
|
if (err)
|
|
goto out;
|
|
cond_resched();
|
|
}
|
|
stop_timing();
|
|
speed = calc_speed();
|
|
printk(PRINT_PREF "erase speed is %ld KiB/s\n", speed);
|
|
|
|
printk(PRINT_PREF "finished\n");
|
|
out:
|
|
kfree(iobuf);
|
|
kfree(bbt);
|
|
put_mtd_device(mtd);
|
|
if (err)
|
|
printk(PRINT_PREF "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");
|