diff options
Diffstat (limited to 'drivers/mtd/tests/oobtest.c')
| -rw-r--r-- | drivers/mtd/tests/oobtest.c | 646 |
1 files changed, 646 insertions, 0 deletions
diff --git a/drivers/mtd/tests/oobtest.c b/drivers/mtd/tests/oobtest.c new file mode 100644 index 000000000000..ff35c465bfee --- /dev/null +++ b/drivers/mtd/tests/oobtest.c @@ -0,0 +1,646 @@ +/* + * Copyright (C) 2006-2008 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 OOB read and write on MTD device. + * + * Author: Adrian Hunter <ext-adrian.hunter@nokia.com> + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <asm/div64.h> +#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 struct mtd_info *mtd; +static unsigned char *readbuf; +static unsigned char *writebuf; +static unsigned char *bbt; + +static int ebcnt; +static int pgcnt; +static int errcnt; +static int use_offset; +static int use_len; +static int use_len_max; +static int vary_offset; +static struct rnd_state rnd_state; + +static void do_vary_offset(void) +{ + use_len -= 1; + if (use_len < 1) { + use_offset += 1; + if (use_offset >= use_len_max) + use_offset = 0; + use_len = use_len_max - use_offset; + } +} + +static int write_eraseblock(int ebnum) +{ + int i; + struct mtd_oob_ops ops; + int err = 0; + loff_t addr = ebnum * mtd->erasesize; + + for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) { + prandom_bytes_state(&rnd_state, writebuf, use_len); + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = 0; + ops.retlen = 0; + ops.ooblen = use_len; + ops.oobretlen = 0; + ops.ooboffs = use_offset; + ops.datbuf = NULL; + ops.oobbuf = writebuf; + err = mtd_write_oob(mtd, addr, &ops); + if (err || ops.oobretlen != use_len) { + pr_err("error: writeoob failed at %#llx\n", + (long long)addr); + pr_err("error: use_len %d, use_offset %d\n", + use_len, use_offset); + errcnt += 1; + return err ? err : -1; + } + if (vary_offset) + do_vary_offset(); + } + + return err; +} + +static int write_whole_device(void) +{ + int err; + unsigned int i; + + pr_info("writing OOBs of whole device\n"); + for (i = 0; i < ebcnt; ++i) { + if (bbt[i]) + continue; + err = write_eraseblock(i); + if (err) + return err; + if (i % 256 == 0) + pr_info("written up to eraseblock %u\n", i); + cond_resched(); + } + pr_info("written %u eraseblocks\n", i); + return 0; +} + +static int verify_eraseblock(int ebnum) +{ + int i; + struct mtd_oob_ops ops; + int err = 0; + loff_t addr = ebnum * mtd->erasesize; + + for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) { + prandom_bytes_state(&rnd_state, writebuf, use_len); + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = 0; + ops.retlen = 0; + ops.ooblen = use_len; + ops.oobretlen = 0; + ops.ooboffs = use_offset; + ops.datbuf = NULL; + ops.oobbuf = readbuf; + err = mtd_read_oob(mtd, addr, &ops); + if (err || ops.oobretlen != use_len) { + pr_err("error: readoob failed at %#llx\n", + (long long)addr); + errcnt += 1; + return err ? err : -1; + } + if (memcmp(readbuf, writebuf, use_len)) { + pr_err("error: verify failed at %#llx\n", + (long long)addr); + errcnt += 1; + if (errcnt > 1000) { + pr_err("error: too many errors\n"); + return -1; + } + } + if (use_offset != 0 || use_len < mtd->ecclayout->oobavail) { + int k; + + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = 0; + ops.retlen = 0; + ops.ooblen = mtd->ecclayout->oobavail; + ops.oobretlen = 0; + ops.ooboffs = 0; + ops.datbuf = NULL; + ops.oobbuf = readbuf; + err = mtd_read_oob(mtd, addr, &ops); + if (err || ops.oobretlen != mtd->ecclayout->oobavail) { + pr_err("error: readoob failed at %#llx\n", + (long long)addr); + errcnt += 1; + return err ? err : -1; + } + if (memcmp(readbuf + use_offset, writebuf, use_len)) { + pr_err("error: verify failed at %#llx\n", + (long long)addr); + errcnt += 1; + if (errcnt > 1000) { + pr_err("error: too many errors\n"); + return -1; + } + } + for (k = 0; k < use_offset; ++k) + if (readbuf[k] != 0xff) { + pr_err("error: verify 0xff " + "failed at %#llx\n", + (long long)addr); + errcnt += 1; + if (errcnt > 1000) { + pr_err("error: too " + "many errors\n"); + return -1; + } + } + for (k = use_offset + use_len; + k < mtd->ecclayout->oobavail; ++k) + if (readbuf[k] != 0xff) { + pr_err("error: verify 0xff " + "failed at %#llx\n", + (long long)addr); + errcnt += 1; + if (errcnt > 1000) { + pr_err("error: too " + "many errors\n"); + return -1; + } + } + } + if (vary_offset) + do_vary_offset(); + } + return err; +} + +static int verify_eraseblock_in_one_go(int ebnum) +{ + struct mtd_oob_ops ops; + int err = 0; + loff_t addr = ebnum * mtd->erasesize; + size_t len = mtd->ecclayout->oobavail * pgcnt; + + prandom_bytes_state(&rnd_state, writebuf, len); + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = 0; + ops.retlen = 0; + ops.ooblen = len; + ops.oobretlen = 0; + ops.ooboffs = 0; + ops.datbuf = NULL; + ops.oobbuf = readbuf; + err = mtd_read_oob(mtd, addr, &ops); + if (err || ops.oobretlen != len) { + pr_err("error: readoob failed at %#llx\n", + (long long)addr); + errcnt += 1; + return err ? err : -1; + } + if (memcmp(readbuf, writebuf, len)) { + pr_err("error: verify failed at %#llx\n", + (long long)addr); + errcnt += 1; + if (errcnt > 1000) { + pr_err("error: too many errors\n"); + return -1; + } + } + + return err; +} + +static int verify_all_eraseblocks(void) +{ + int err; + unsigned int i; + + pr_info("verifying all eraseblocks\n"); + for (i = 0; i < ebcnt; ++i) { + if (bbt[i]) + continue; + err = verify_eraseblock(i); + if (err) + return err; + if (i % 256 == 0) + pr_info("verified up to eraseblock %u\n", i); + cond_resched(); + } + pr_info("verified %u eraseblocks\n", i); + return 0; +} + +static int __init mtd_oobtest_init(void) +{ + int err = 0; + unsigned int i; + uint64_t tmp; + struct mtd_oob_ops ops; + loff_t addr = 0, addr0; + + 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; + } + + 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->type != MTD_NANDFLASH) { + pr_info("this test requires NAND flash\n"); + goto out; + } + + tmp = mtd->size; + do_div(tmp, mtd->erasesize); + ebcnt = tmp; + pgcnt = mtd->erasesize / mtd->writesize; + + 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, + mtd->writesize, ebcnt, pgcnt, mtd->oobsize); + + err = -ENOMEM; + readbuf = kmalloc(mtd->erasesize, GFP_KERNEL); + if (!readbuf) + goto out; + writebuf = kmalloc(mtd->erasesize, GFP_KERNEL); + if (!writebuf) + goto out; + bbt = kzalloc(ebcnt, GFP_KERNEL); + if (!bbt) + goto out; + + err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt); + if (err) + goto out; + + use_offset = 0; + use_len = mtd->ecclayout->oobavail; + use_len_max = mtd->ecclayout->oobavail; + vary_offset = 0; + + /* First test: write all OOB, read it back and verify */ + pr_info("test 1 of 5\n"); + + err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); + if (err) + goto out; + + prandom_seed_state(&rnd_state, 1); + err = write_whole_device(); + if (err) + goto out; + + prandom_seed_state(&rnd_state, 1); + err = verify_all_eraseblocks(); + if (err) + goto out; + + /* + * Second test: write all OOB, a block at a time, read it back and + * verify. + */ + pr_info("test 2 of 5\n"); + + err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); + if (err) + goto out; + + prandom_seed_state(&rnd_state, 3); + err = write_whole_device(); + if (err) + goto out; + + /* Check all eraseblocks */ + prandom_seed_state(&rnd_state, 3); + pr_info("verifying all eraseblocks\n"); + for (i = 0; i < ebcnt; ++i) { + if (bbt[i]) + continue; + err = verify_eraseblock_in_one_go(i); + if (err) + goto out; + if (i % 256 == 0) + pr_info("verified up to eraseblock %u\n", i); + cond_resched(); + } + pr_info("verified %u eraseblocks\n", i); + + /* + * Third test: write OOB at varying offsets and lengths, read it back + * and verify. + */ + pr_info("test 3 of 5\n"); + + err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); + if (err) + goto out; + + /* Write all eraseblocks */ + use_offset = 0; + use_len = mtd->ecclayout->oobavail; + use_len_max = mtd->ecclayout->oobavail; + vary_offset = 1; + prandom_seed_state(&rnd_state, 5); + + err = write_whole_device(); + if (err) + goto out; + + /* Check all eraseblocks */ + use_offset = 0; + use_len = mtd->ecclayout->oobavail; + use_len_max = mtd->ecclayout->oobavail; + vary_offset = 1; + prandom_seed_state(&rnd_state, 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 */ + pr_info("test 4 of 5\n"); + + err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); + if (err) + goto out; + + addr0 = 0; + for (i = 0; i < ebcnt && bbt[i]; ++i) + addr0 += mtd->erasesize; + + /* Attempt to write off end of OOB */ + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = 0; + ops.retlen = 0; + ops.ooblen = 1; + ops.oobretlen = 0; + ops.ooboffs = mtd->ecclayout->oobavail; + ops.datbuf = NULL; + ops.oobbuf = writebuf; + pr_info("attempting to start write past end of OOB\n"); + pr_info("an error is expected...\n"); + err = mtd_write_oob(mtd, addr0, &ops); + if (err) { + pr_info("error occurred as expected\n"); + err = 0; + } else { + pr_err("error: can write past end of OOB\n"); + errcnt += 1; + } + + /* Attempt to read off end of OOB */ + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = 0; + ops.retlen = 0; + ops.ooblen = 1; + ops.oobretlen = 0; + ops.ooboffs = mtd->ecclayout->oobavail; + ops.datbuf = NULL; + ops.oobbuf = readbuf; + pr_info("attempting to start read past end of OOB\n"); + pr_info("an error is expected...\n"); + err = mtd_read_oob(mtd, addr0, &ops); + if (err) { + pr_info("error occurred as expected\n"); + err = 0; + } else { + pr_err("error: can read past end of OOB\n"); + errcnt += 1; + } + + if (bbt[ebcnt - 1]) + pr_info("skipping end of device tests because last " + "block is bad\n"); + else { + /* Attempt to write off end of device */ + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = 0; + ops.retlen = 0; + ops.ooblen = mtd->ecclayout->oobavail + 1; + ops.oobretlen = 0; + ops.ooboffs = 0; + ops.datbuf = NULL; + ops.oobbuf = writebuf; + pr_info("attempting to write past end of device\n"); + pr_info("an error is expected...\n"); + err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops); + if (err) { + pr_info("error occurred as expected\n"); + err = 0; + } else { + pr_err("error: wrote past end of device\n"); + errcnt += 1; + } + + /* Attempt to read off end of device */ + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = 0; + ops.retlen = 0; + ops.ooblen = mtd->ecclayout->oobavail + 1; + ops.oobretlen = 0; + ops.ooboffs = 0; + ops.datbuf = NULL; + ops.oobbuf = readbuf; + pr_info("attempting to read past end of device\n"); + pr_info("an error is expected...\n"); + err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops); + if (err) { + pr_info("error occurred as expected\n"); + err = 0; + } else { + pr_err("error: read past end of device\n"); + errcnt += 1; + } + + err = mtdtest_erase_eraseblock(mtd, ebcnt - 1); + if (err) + goto out; + + /* Attempt to write off end of device */ + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = 0; + ops.retlen = 0; + ops.ooblen = mtd->ecclayout->oobavail; + ops.oobretlen = 0; + ops.ooboffs = 1; + ops.datbuf = NULL; + ops.oobbuf = writebuf; + pr_info("attempting to write past end of device\n"); + pr_info("an error is expected...\n"); + err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops); + if (err) { + pr_info("error occurred as expected\n"); + err = 0; + } else { + pr_err("error: wrote past end of device\n"); + errcnt += 1; + } + + /* Attempt to read off end of device */ + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = 0; + ops.retlen = 0; + ops.ooblen = mtd->ecclayout->oobavail; + ops.oobretlen = 0; + ops.ooboffs = 1; + ops.datbuf = NULL; + ops.oobbuf = readbuf; + pr_info("attempting to read past end of device\n"); + pr_info("an error is expected...\n"); + err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops); + if (err) { + pr_info("error occurred as expected\n"); + err = 0; + } else { + pr_err("error: read past end of device\n"); + errcnt += 1; + } + } + + /* Fifth test: write / read across block boundaries */ + pr_info("test 5 of 5\n"); + + /* Erase all eraseblocks */ + err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); + if (err) + goto out; + + /* Write all eraseblocks */ + prandom_seed_state(&rnd_state, 11); + pr_info("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) { + prandom_bytes_state(&rnd_state, writebuf, sz); + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = 0; + ops.retlen = 0; + ops.ooblen = sz; + ops.oobretlen = 0; + ops.ooboffs = 0; + ops.datbuf = NULL; + ops.oobbuf = writebuf; + err = mtd_write_oob(mtd, addr, &ops); + if (err) + goto out; + if (i % 256 == 0) + pr_info("written up to eraseblock %u\n", i); + cond_resched(); + addr += mtd->writesize; + } + } + pr_info("written %u eraseblocks\n", i); + + /* Check all eraseblocks */ + prandom_seed_state(&rnd_state, 11); + pr_info("verifying all eraseblocks\n"); + for (i = 0; i < ebcnt - 1; ++i) { + if (bbt[i] || bbt[i + 1]) + continue; + prandom_bytes_state(&rnd_state, writebuf, + mtd->ecclayout->oobavail * 2); + addr = (i + 1) * mtd->erasesize - mtd->writesize; + ops.mode = MTD_OPS_AUTO_OOB; + ops.len = 0; + ops.retlen = 0; + ops.ooblen = mtd->ecclayout->oobavail * 2; + ops.oobretlen = 0; + ops.ooboffs = 0; + ops.datbuf = NULL; + ops.oobbuf = readbuf; + err = mtd_read_oob(mtd, addr, &ops); + if (err) + goto out; + if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) { + pr_err("error: verify failed at %#llx\n", + (long long)addr); + errcnt += 1; + if (errcnt > 1000) { + pr_err("error: too many errors\n"); + goto out; + } + } + if (i % 256 == 0) + pr_info("verified up to eraseblock %u\n", i); + cond_resched(); + } + pr_info("verified %u eraseblocks\n", i); + + pr_info("finished with %d errors\n", errcnt); +out: + kfree(bbt); + kfree(writebuf); + kfree(readbuf); + put_mtd_device(mtd); + if (err) + pr_info("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"); |