--- /dev/null
+/*
+ * 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 <adrian.hunter@nokia.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#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>
+#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 struct timeval 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.mtd = mtd;
+ 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;
+ }
+
+ if (ei.state == MTD_ERASE_FAILED) {
+ pr_err("some erase error occurred at EB %d,"
+ "blocks %d\n", ebnum, blocks);
+ return -EIO;
+ }
+
+ 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)
+{
+ do_gettimeofday(&start);
+}
+
+static inline void stop_timing(void)
+{
+ do_gettimeofday(&finish);
+}
+
+static long calc_speed(void)
+{
+ uint64_t k;
+ long ms;
+
+ ms = (finish.tv_sec - start.tv_sec) * 1000 +
+ (finish.tv_usec - start.tv_usec) / 1000;
+ 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");
Code Review / kvmfornfv.git / blobdiff