419 lines
8.4 KiB
C
419 lines
8.4 KiB
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, us;
|
|
|
|
us = ktime_us_delta(finish, start);
|
|
if (us == 0)
|
|
return 0;
|
|
k = (uint64_t)goodebcnt * (mtd->erasesize / 1024) * 1000000;
|
|
do_div(k, us);
|
|
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;
|
|
|
|
get_random_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");
|