MTD: tests: add mtd_oobtest
This test checks that OOB of a NAND MTD device works fine. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy
parent
e93f1be503
commit
e3644da756
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@ -0,0 +1,742 @@
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/*
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* Copyright (C) 2006-2008 Nokia Corporation
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; see the file COPYING. If not, write to the Free Software
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* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Test OOB read and write on MTD device.
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*
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* Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
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*/
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#include <asm/div64.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/err.h>
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#include <linux/mtd/mtd.h>
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#include <linux/sched.h>
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#define PRINT_PREF KERN_INFO "mtd_oobtest: "
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static int dev;
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module_param(dev, int, S_IRUGO);
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MODULE_PARM_DESC(dev, "MTD device number to use");
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static struct mtd_info *mtd;
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static unsigned char *readbuf;
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static unsigned char *writebuf;
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static unsigned char *bbt;
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static int ebcnt;
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static int pgcnt;
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static int errcnt;
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static int use_offset;
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static int use_len;
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static int use_len_max;
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static int vary_offset;
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static unsigned long next = 1;
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static inline unsigned int simple_rand(void)
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{
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next = next * 1103515245 + 12345;
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return (unsigned int)((next / 65536) % 32768);
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}
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static inline void simple_srand(unsigned long seed)
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{
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next = seed;
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}
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static void set_random_data(unsigned char *buf, size_t len)
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{
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size_t i;
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for (i = 0; i < len; ++i)
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buf[i] = simple_rand();
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}
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static int erase_eraseblock(int ebnum)
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{
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int err;
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struct erase_info ei;
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loff_t addr = ebnum * mtd->erasesize;
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memset(&ei, 0, sizeof(struct erase_info));
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ei.mtd = mtd;
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ei.addr = addr;
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ei.len = mtd->erasesize;
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err = mtd->erase(mtd, &ei);
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if (err) {
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printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
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return err;
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}
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if (ei.state == MTD_ERASE_FAILED) {
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printk(PRINT_PREF "some erase error occurred at EB %d\n",
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ebnum);
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return -EIO;
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}
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return 0;
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}
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static int erase_whole_device(void)
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{
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int err;
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unsigned int i;
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printk(PRINT_PREF "erasing whole device\n");
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for (i = 0; i < ebcnt; ++i) {
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if (bbt[i])
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continue;
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err = erase_eraseblock(i);
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if (err)
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return err;
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cond_resched();
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}
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printk(PRINT_PREF "erased %u eraseblocks\n", i);
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return 0;
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}
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static void do_vary_offset(void)
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{
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use_len -= 1;
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if (use_len < 1) {
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use_offset += 1;
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if (use_offset >= use_len_max)
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use_offset = 0;
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use_len = use_len_max - use_offset;
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}
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}
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static int write_eraseblock(int ebnum)
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{
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int i;
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struct mtd_oob_ops ops;
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int err = 0;
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loff_t addr = ebnum * mtd->erasesize;
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for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {
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set_random_data(writebuf, use_len);
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ops.mode = MTD_OOB_AUTO;
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ops.len = 0;
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ops.retlen = 0;
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ops.ooblen = use_len;
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ops.oobretlen = 0;
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ops.ooboffs = use_offset;
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ops.datbuf = 0;
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ops.oobbuf = writebuf;
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err = mtd->write_oob(mtd, addr, &ops);
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if (err || ops.oobretlen != use_len) {
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printk(PRINT_PREF "error: writeoob failed at %#llx\n",
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(long long)addr);
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printk(PRINT_PREF "error: use_len %d, use_offset %d\n",
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use_len, use_offset);
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errcnt += 1;
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return err ? err : -1;
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}
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if (vary_offset)
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do_vary_offset();
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}
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return err;
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}
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static int write_whole_device(void)
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{
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int err;
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unsigned int i;
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printk(PRINT_PREF "writing OOBs of whole device\n");
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for (i = 0; i < ebcnt; ++i) {
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if (bbt[i])
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continue;
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err = write_eraseblock(i);
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if (err)
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return err;
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if (i % 256 == 0)
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printk(PRINT_PREF "written up to eraseblock %u\n", i);
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cond_resched();
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}
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printk(PRINT_PREF "written %u eraseblocks\n", i);
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return 0;
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}
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static int verify_eraseblock(int ebnum)
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{
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int i;
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struct mtd_oob_ops ops;
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int err = 0;
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loff_t addr = ebnum * mtd->erasesize;
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for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {
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set_random_data(writebuf, use_len);
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ops.mode = MTD_OOB_AUTO;
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ops.len = 0;
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ops.retlen = 0;
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ops.ooblen = use_len;
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ops.oobretlen = 0;
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ops.ooboffs = use_offset;
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ops.datbuf = 0;
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ops.oobbuf = readbuf;
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err = mtd->read_oob(mtd, addr, &ops);
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if (err || ops.oobretlen != use_len) {
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printk(PRINT_PREF "error: readoob failed at %#llx\n",
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(long long)addr);
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errcnt += 1;
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return err ? err : -1;
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}
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if (memcmp(readbuf, writebuf, use_len)) {
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printk(PRINT_PREF "error: verify failed at %#llx\n",
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(long long)addr);
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errcnt += 1;
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if (errcnt > 1000) {
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printk(PRINT_PREF "error: too many errors\n");
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return -1;
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}
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}
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if (use_offset != 0 || use_len < mtd->ecclayout->oobavail) {
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int k;
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ops.mode = MTD_OOB_AUTO;
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ops.len = 0;
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ops.retlen = 0;
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ops.ooblen = mtd->ecclayout->oobavail;
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ops.oobretlen = 0;
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ops.ooboffs = 0;
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ops.datbuf = 0;
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ops.oobbuf = readbuf;
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err = mtd->read_oob(mtd, addr, &ops);
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if (err || ops.oobretlen != mtd->ecclayout->oobavail) {
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printk(PRINT_PREF "error: readoob failed at "
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"%#llx\n", (long long)addr);
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errcnt += 1;
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return err ? err : -1;
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}
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if (memcmp(readbuf + use_offset, writebuf, use_len)) {
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printk(PRINT_PREF "error: verify failed at "
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"%#llx\n", (long long)addr);
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errcnt += 1;
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if (errcnt > 1000) {
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printk(PRINT_PREF "error: too many "
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"errors\n");
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return -1;
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}
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}
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for (k = 0; k < use_offset; ++k)
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if (readbuf[k] != 0xff) {
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printk(PRINT_PREF "error: verify 0xff "
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"failed at %#llx\n",
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(long long)addr);
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errcnt += 1;
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if (errcnt > 1000) {
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printk(PRINT_PREF "error: too "
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"many errors\n");
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return -1;
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}
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}
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for (k = use_offset + use_len;
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k < mtd->ecclayout->oobavail; ++k)
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if (readbuf[k] != 0xff) {
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printk(PRINT_PREF "error: verify 0xff "
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"failed at %#llx\n",
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(long long)addr);
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errcnt += 1;
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if (errcnt > 1000) {
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printk(PRINT_PREF "error: too "
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"many errors\n");
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return -1;
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}
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}
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}
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if (vary_offset)
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do_vary_offset();
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}
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return err;
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}
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static int verify_eraseblock_in_one_go(int ebnum)
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{
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struct mtd_oob_ops ops;
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int err = 0;
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loff_t addr = ebnum * mtd->erasesize;
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size_t len = mtd->ecclayout->oobavail * pgcnt;
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set_random_data(writebuf, len);
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ops.mode = MTD_OOB_AUTO;
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ops.len = 0;
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ops.retlen = 0;
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ops.ooblen = len;
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ops.oobretlen = 0;
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ops.ooboffs = 0;
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ops.datbuf = 0;
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ops.oobbuf = readbuf;
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err = mtd->read_oob(mtd, addr, &ops);
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if (err || ops.oobretlen != len) {
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printk(PRINT_PREF "error: readoob failed at %#llx\n",
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(long long)addr);
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errcnt += 1;
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return err ? err : -1;
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}
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if (memcmp(readbuf, writebuf, len)) {
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printk(PRINT_PREF "error: verify failed at %#llx\n",
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(long long)addr);
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errcnt += 1;
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if (errcnt > 1000) {
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printk(PRINT_PREF "error: too many errors\n");
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return -1;
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}
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}
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return err;
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}
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static int verify_all_eraseblocks(void)
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{
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int err;
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unsigned int i;
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printk(PRINT_PREF "verifying all eraseblocks\n");
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for (i = 0; i < ebcnt; ++i) {
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if (bbt[i])
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continue;
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err = verify_eraseblock(i);
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if (err)
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return err;
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if (i % 256 == 0)
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printk(PRINT_PREF "verified up to eraseblock %u\n", i);
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cond_resched();
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}
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printk(PRINT_PREF "verified %u eraseblocks\n", i);
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return 0;
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}
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static int is_block_bad(int ebnum)
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{
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int ret;
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loff_t addr = ebnum * mtd->erasesize;
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ret = mtd->block_isbad(mtd, addr);
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if (ret)
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printk(PRINT_PREF "block %d is bad\n", ebnum);
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return ret;
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}
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static int scan_for_bad_eraseblocks(void)
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{
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int i, bad = 0;
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bbt = kmalloc(ebcnt, GFP_KERNEL);
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if (!bbt) {
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printk(PRINT_PREF "error: cannot allocate memory\n");
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return -ENOMEM;
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}
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memset(bbt, 0 , ebcnt);
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printk(PRINT_PREF "scanning for bad eraseblocks\n");
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for (i = 0; i < ebcnt; ++i) {
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bbt[i] = is_block_bad(i) ? 1 : 0;
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if (bbt[i])
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bad += 1;
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cond_resched();
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}
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printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad);
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return 0;
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}
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static int __init mtd_oobtest_init(void)
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{
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int err = 0;
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unsigned int i;
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uint64_t tmp;
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struct mtd_oob_ops ops;
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loff_t addr = 0, addr0;
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printk(KERN_INFO "\n");
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printk(KERN_INFO "=================================================\n");
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printk(PRINT_PREF "MTD device: %d\n", dev);
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mtd = get_mtd_device(NULL, dev);
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if (IS_ERR(mtd)) {
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err = PTR_ERR(mtd);
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printk(PRINT_PREF "error: cannot get MTD device\n");
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return err;
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}
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if (mtd->type != MTD_NANDFLASH) {
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printk(PRINT_PREF "this test requires NAND flash\n");
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goto out;
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}
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tmp = mtd->size;
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do_div(tmp, mtd->erasesize);
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ebcnt = tmp;
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pgcnt = mtd->erasesize / mtd->writesize;
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printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, "
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"page size %u, count of eraseblocks %u, pages per "
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"eraseblock %u, OOB size %u\n",
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(unsigned long long)mtd->size, mtd->erasesize,
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mtd->writesize, ebcnt, pgcnt, mtd->oobsize);
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err = -ENOMEM;
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mtd->erasesize = mtd->erasesize;
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readbuf = kmalloc(mtd->erasesize, GFP_KERNEL);
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if (!readbuf) {
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printk(PRINT_PREF "error: cannot allocate memory\n");
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goto out;
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}
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writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);
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if (!writebuf) {
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printk(PRINT_PREF "error: cannot allocate memory\n");
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goto out;
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}
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err = scan_for_bad_eraseblocks();
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if (err)
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goto out;
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use_offset = 0;
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use_len = mtd->ecclayout->oobavail;
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use_len_max = mtd->ecclayout->oobavail;
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vary_offset = 0;
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/* First test: write all OOB, read it back and verify */
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printk(PRINT_PREF "test 1 of 5\n");
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err = erase_whole_device();
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if (err)
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goto out;
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simple_srand(1);
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err = write_whole_device();
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if (err)
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goto out;
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simple_srand(1);
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err = verify_all_eraseblocks();
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if (err)
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goto out;
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/*
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* Second test: write all OOB, a block at a time, read it back and
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* verify.
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*/
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printk(PRINT_PREF "test 2 of 5\n");
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err = erase_whole_device();
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if (err)
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goto out;
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simple_srand(3);
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err = write_whole_device();
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if (err)
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goto out;
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/* Check all eraseblocks */
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simple_srand(3);
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printk(PRINT_PREF "verifying all eraseblocks\n");
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for (i = 0; i < ebcnt; ++i) {
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if (bbt[i])
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continue;
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err = verify_eraseblock_in_one_go(i);
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if (err)
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goto out;
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if (i % 256 == 0)
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printk(PRINT_PREF "verified up to eraseblock %u\n", i);
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cond_resched();
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}
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printk(PRINT_PREF "verified %u eraseblocks\n", i);
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/*
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* Third test: write OOB at varying offsets and lengths, read it back
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* and verify.
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*/
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printk(PRINT_PREF "test 3 of 5\n");
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err = erase_whole_device();
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if (err)
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goto out;
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/* Write all eraseblocks */
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use_offset = 0;
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use_len = mtd->ecclayout->oobavail;
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use_len_max = mtd->ecclayout->oobavail;
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vary_offset = 1;
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simple_srand(5);
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printk(PRINT_PREF "writing OOBs of whole device\n");
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for (i = 0; i < ebcnt; ++i) {
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if (bbt[i])
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continue;
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err = write_eraseblock(i);
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if (err)
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goto out;
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if (i % 256 == 0)
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printk(PRINT_PREF "written up to eraseblock %u\n", i);
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cond_resched();
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}
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printk(PRINT_PREF "written %u eraseblocks\n", i);
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/* Check all eraseblocks */
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use_offset = 0;
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use_len = mtd->ecclayout->oobavail;
|
||||
use_len_max = mtd->ecclayout->oobavail;
|
||||
vary_offset = 1;
|
||||
simple_srand(5);
|
||||
err = verify_all_eraseblocks();
|
||||
if (err)
|
||||
goto out;
|
||||
|
||||
use_offset = 0;
|
||||
use_len = mtd->ecclayout->oobavail;
|
||||
use_len_max = mtd->ecclayout->oobavail;
|
||||
vary_offset = 0;
|
||||
|
||||
/* Fourth test: try to write off end of device */
|
||||
printk(PRINT_PREF "test 4 of 5\n");
|
||||
|
||||
err = erase_whole_device();
|
||||
if (err)
|
||||
goto out;
|
||||
|
||||
addr0 = 0;
|
||||
for (i = 0; bbt[i] && i < ebcnt; ++i)
|
||||
addr0 += mtd->erasesize;
|
||||
|
||||
/* Attempt to write off end of OOB */
|
||||
ops.mode = MTD_OOB_AUTO;
|
||||
ops.len = 0;
|
||||
ops.retlen = 0;
|
||||
ops.ooblen = 1;
|
||||
ops.oobretlen = 0;
|
||||
ops.ooboffs = mtd->ecclayout->oobavail;
|
||||
ops.datbuf = 0;
|
||||
ops.oobbuf = writebuf;
|
||||
printk(PRINT_PREF "attempting to start write past end of OOB\n");
|
||||
printk(PRINT_PREF "an error is expected...\n");
|
||||
err = mtd->write_oob(mtd, addr0, &ops);
|
||||
if (err) {
|
||||
printk(PRINT_PREF "error occurred as expected\n");
|
||||
err = 0;
|
||||
} else {
|
||||
printk(PRINT_PREF "error: can write past end of OOB\n");
|
||||
errcnt += 1;
|
||||
}
|
||||
|
||||
/* Attempt to read off end of OOB */
|
||||
ops.mode = MTD_OOB_AUTO;
|
||||
ops.len = 0;
|
||||
ops.retlen = 0;
|
||||
ops.ooblen = 1;
|
||||
ops.oobretlen = 0;
|
||||
ops.ooboffs = mtd->ecclayout->oobavail;
|
||||
ops.datbuf = 0;
|
||||
ops.oobbuf = readbuf;
|
||||
printk(PRINT_PREF "attempting to start read past end of OOB\n");
|
||||
printk(PRINT_PREF "an error is expected...\n");
|
||||
err = mtd->read_oob(mtd, addr0, &ops);
|
||||
if (err) {
|
||||
printk(PRINT_PREF "error occurred as expected\n");
|
||||
err = 0;
|
||||
} else {
|
||||
printk(PRINT_PREF "error: can read past end of OOB\n");
|
||||
errcnt += 1;
|
||||
}
|
||||
|
||||
if (bbt[ebcnt - 1])
|
||||
printk(PRINT_PREF "skipping end of device tests because last "
|
||||
"block is bad\n");
|
||||
else {
|
||||
/* Attempt to write off end of device */
|
||||
ops.mode = MTD_OOB_AUTO;
|
||||
ops.len = 0;
|
||||
ops.retlen = 0;
|
||||
ops.ooblen = mtd->ecclayout->oobavail + 1;
|
||||
ops.oobretlen = 0;
|
||||
ops.ooboffs = 0;
|
||||
ops.datbuf = 0;
|
||||
ops.oobbuf = writebuf;
|
||||
printk(PRINT_PREF "attempting to write past end of device\n");
|
||||
printk(PRINT_PREF "an error is expected...\n");
|
||||
err = mtd->write_oob(mtd, mtd->size - mtd->writesize, &ops);
|
||||
if (err) {
|
||||
printk(PRINT_PREF "error occurred as expected\n");
|
||||
err = 0;
|
||||
} else {
|
||||
printk(PRINT_PREF "error: wrote past end of device\n");
|
||||
errcnt += 1;
|
||||
}
|
||||
|
||||
/* Attempt to read off end of device */
|
||||
ops.mode = MTD_OOB_AUTO;
|
||||
ops.len = 0;
|
||||
ops.retlen = 0;
|
||||
ops.ooblen = mtd->ecclayout->oobavail + 1;
|
||||
ops.oobretlen = 0;
|
||||
ops.ooboffs = 0;
|
||||
ops.datbuf = 0;
|
||||
ops.oobbuf = readbuf;
|
||||
printk(PRINT_PREF "attempting to read past end of device\n");
|
||||
printk(PRINT_PREF "an error is expected...\n");
|
||||
err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops);
|
||||
if (err) {
|
||||
printk(PRINT_PREF "error occurred as expected\n");
|
||||
err = 0;
|
||||
} else {
|
||||
printk(PRINT_PREF "error: read past end of device\n");
|
||||
errcnt += 1;
|
||||
}
|
||||
|
||||
err = erase_eraseblock(ebcnt - 1);
|
||||
if (err)
|
||||
goto out;
|
||||
|
||||
/* Attempt to write off end of device */
|
||||
ops.mode = MTD_OOB_AUTO;
|
||||
ops.len = 0;
|
||||
ops.retlen = 0;
|
||||
ops.ooblen = mtd->ecclayout->oobavail;
|
||||
ops.oobretlen = 0;
|
||||
ops.ooboffs = 1;
|
||||
ops.datbuf = 0;
|
||||
ops.oobbuf = writebuf;
|
||||
printk(PRINT_PREF "attempting to write past end of device\n");
|
||||
printk(PRINT_PREF "an error is expected...\n");
|
||||
err = mtd->write_oob(mtd, mtd->size - mtd->writesize, &ops);
|
||||
if (err) {
|
||||
printk(PRINT_PREF "error occurred as expected\n");
|
||||
err = 0;
|
||||
} else {
|
||||
printk(PRINT_PREF "error: wrote past end of device\n");
|
||||
errcnt += 1;
|
||||
}
|
||||
|
||||
/* Attempt to read off end of device */
|
||||
ops.mode = MTD_OOB_AUTO;
|
||||
ops.len = 0;
|
||||
ops.retlen = 0;
|
||||
ops.ooblen = mtd->ecclayout->oobavail;
|
||||
ops.oobretlen = 0;
|
||||
ops.ooboffs = 1;
|
||||
ops.datbuf = 0;
|
||||
ops.oobbuf = readbuf;
|
||||
printk(PRINT_PREF "attempting to read past end of device\n");
|
||||
printk(PRINT_PREF "an error is expected...\n");
|
||||
err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops);
|
||||
if (err) {
|
||||
printk(PRINT_PREF "error occurred as expected\n");
|
||||
err = 0;
|
||||
} else {
|
||||
printk(PRINT_PREF "error: read past end of device\n");
|
||||
errcnt += 1;
|
||||
}
|
||||
}
|
||||
|
||||
/* Fifth test: write / read across block boundaries */
|
||||
printk(PRINT_PREF "test 5 of 5\n");
|
||||
|
||||
/* Erase all eraseblocks */
|
||||
err = erase_whole_device();
|
||||
if (err)
|
||||
goto out;
|
||||
|
||||
/* Write all eraseblocks */
|
||||
simple_srand(11);
|
||||
printk(PRINT_PREF "writing OOBs of whole device\n");
|
||||
for (i = 0; i < ebcnt - 1; ++i) {
|
||||
int cnt = 2;
|
||||
int pg;
|
||||
size_t sz = mtd->ecclayout->oobavail;
|
||||
if (bbt[i] || bbt[i + 1])
|
||||
continue;
|
||||
addr = (i + 1) * mtd->erasesize - mtd->writesize;
|
||||
for (pg = 0; pg < cnt; ++pg) {
|
||||
set_random_data(writebuf, sz);
|
||||
ops.mode = MTD_OOB_AUTO;
|
||||
ops.len = 0;
|
||||
ops.retlen = 0;
|
||||
ops.ooblen = sz;
|
||||
ops.oobretlen = 0;
|
||||
ops.ooboffs = 0;
|
||||
ops.datbuf = 0;
|
||||
ops.oobbuf = writebuf;
|
||||
err = mtd->write_oob(mtd, addr, &ops);
|
||||
if (err)
|
||||
goto out;
|
||||
if (i % 256 == 0)
|
||||
printk(PRINT_PREF "written up to eraseblock "
|
||||
"%u\n", i);
|
||||
cond_resched();
|
||||
addr += mtd->writesize;
|
||||
}
|
||||
}
|
||||
printk(PRINT_PREF "written %u eraseblocks\n", i);
|
||||
|
||||
/* Check all eraseblocks */
|
||||
simple_srand(11);
|
||||
printk(PRINT_PREF "verifying all eraseblocks\n");
|
||||
for (i = 0; i < ebcnt - 1; ++i) {
|
||||
if (bbt[i] || bbt[i + 1])
|
||||
continue;
|
||||
set_random_data(writebuf, mtd->ecclayout->oobavail * 2);
|
||||
addr = (i + 1) * mtd->erasesize - mtd->writesize;
|
||||
ops.mode = MTD_OOB_AUTO;
|
||||
ops.len = 0;
|
||||
ops.retlen = 0;
|
||||
ops.ooblen = mtd->ecclayout->oobavail * 2;
|
||||
ops.oobretlen = 0;
|
||||
ops.ooboffs = 0;
|
||||
ops.datbuf = 0;
|
||||
ops.oobbuf = readbuf;
|
||||
err = mtd->read_oob(mtd, addr, &ops);
|
||||
if (err)
|
||||
goto out;
|
||||
if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) {
|
||||
printk(PRINT_PREF "error: verify failed at %#llx\n",
|
||||
(long long)addr);
|
||||
errcnt += 1;
|
||||
if (errcnt > 1000) {
|
||||
printk(PRINT_PREF "error: too many errors\n");
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
if (i % 256 == 0)
|
||||
printk(PRINT_PREF "verified up to eraseblock %u\n", i);
|
||||
cond_resched();
|
||||
}
|
||||
printk(PRINT_PREF "verified %u eraseblocks\n", i);
|
||||
|
||||
printk(PRINT_PREF "finished with %d errors\n", errcnt);
|
||||
out:
|
||||
kfree(bbt);
|
||||
kfree(writebuf);
|
||||
kfree(readbuf);
|
||||
put_mtd_device(mtd);
|
||||
if (err)
|
||||
printk(PRINT_PREF "error %d occurred\n", err);
|
||||
printk(KERN_INFO "=================================================\n");
|
||||
return err;
|
||||
}
|
||||
module_init(mtd_oobtest_init);
|
||||
|
||||
static void __exit mtd_oobtest_exit(void)
|
||||
{
|
||||
return;
|
||||
}
|
||||
module_exit(mtd_oobtest_exit);
|
||||
|
||||
MODULE_DESCRIPTION("Out-of-band test module");
|
||||
MODULE_AUTHOR("Adrian Hunter");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue