diff options
Diffstat (limited to 'drivers/mtd/tests/mtd_speedtest.c')
| -rw-r--r-- | drivers/mtd/tests/mtd_speedtest.c | 560 |
1 files changed, 0 insertions, 560 deletions
diff --git a/drivers/mtd/tests/mtd_speedtest.c b/drivers/mtd/tests/mtd_speedtest.c deleted file mode 100644 index a6ce9c1fa6c5..000000000000 --- a/drivers/mtd/tests/mtd_speedtest.c +++ /dev/null @@ -1,560 +0,0 @@ -/* - * 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> - -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 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) { - pr_err("error %d while erasing EB %d\n", err, ebnum); - return err; - } - - if (ei.state == MTD_ERASE_FAILED) { - pr_err("some erase error occurred at EB %d\n", - ebnum); - return -EIO; - } - - return 0; -} - -static int multiblock_erase(int ebnum, int blocks) -{ - 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 * 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 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; - int err = 0; - loff_t addr = ebnum * mtd->erasesize; - - err = mtd_write(mtd, addr, mtd->erasesize, &written, iobuf); - if (err || written != mtd->erasesize) { - pr_err("error: write failed at %#llx\n", addr); - if (!err) - err = -EINVAL; - } - - return err; -} - -static int write_eraseblock_by_page(int ebnum) -{ - size_t written; - 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) { - pr_err("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, 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) { - pr_err("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) { - pr_err("error: write failed at %#llx\n", - addr); - if (!err) - err = -EINVAL; - } - } - - return err; -} - -static int read_eraseblock(int ebnum) -{ - size_t read; - int err = 0; - loff_t addr = ebnum * mtd->erasesize; - - err = mtd_read(mtd, addr, mtd->erasesize, &read, iobuf); - /* Ignore corrected ECC errors */ - if (mtd_is_bitflip(err)) - err = 0; - if (err || read != mtd->erasesize) { - pr_err("error: read failed at %#llx\n", addr); - if (!err) - err = -EINVAL; - } - - return err; -} - -static int read_eraseblock_by_page(int ebnum) -{ - size_t read; - 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 (mtd_is_bitflip(err)) - err = 0; - if (err || read != pgsize) { - pr_err("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, 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 (mtd_is_bitflip(err)) - err = 0; - if (err || read != sz) { - pr_err("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 (mtd_is_bitflip(err)) - err = 0; - if (err || read != pgsize) { - pr_err("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) - pr_info("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) -{ - 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 = goodebcnt * (mtd->erasesize / 1024) * 1000; - do_div(k, ms); - return k; -} - -static int scan_for_bad_eraseblocks(void) -{ - int i, bad = 0; - - bbt = kzalloc(ebcnt, GFP_KERNEL); - if (!bbt) { - pr_err("error: cannot allocate memory\n"); - return -ENOMEM; - } - - if (!mtd_can_have_bb(mtd)) - goto out; - - pr_info("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(); - } - pr_info("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, 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) { - pr_err("error: cannot allocate memory\n"); - goto out; - } - - prandom_bytes(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 */ - 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; - cond_resched(); - } - 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; - cond_resched(); - } - stop_timing(); - speed = calc_speed(); - pr_info("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 */ - 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; - cond_resched(); - } - 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; - cond_resched(); - } - stop_timing(); - speed = calc_speed(); - pr_info("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 */ - 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; - cond_resched(); - } - 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; - cond_resched(); - } - 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(); - 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(); - 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; - cond_resched(); - 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"); |