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android_kernel_xiaomi_sm8350/drivers/mtd/tests/speedtest.c
Thomas Gleixner 4cd10358d6 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 326 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 9 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000435.832876118@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:37:06 +02:00

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// 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");
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