예제 #1
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");
	printk(PRINT_PREF "MTD device: %d\n", dev);

	mtd = get_mtd_device(NULL, dev);
	if (IS_ERR(mtd)) {
		err = PTR_ERR(mtd);
		printk(PRINT_PREF "error: cannot get MTD device\n");
		return err;
	}

	if (mtd->type != MTD_NANDFLASH) {
		printk(PRINT_PREF "this test requires NAND flash\n");
		goto out;
	}

	tmp = mtd->size;
	do_div(tmp, mtd->erasesize);
	ebcnt = tmp;
	pgcnt = mtd->erasesize / mtd->writesize;

	printk(PRINT_PREF "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;
	mtd->erasesize = mtd->erasesize;
	readbuf = kmalloc(mtd->erasesize, GFP_KERNEL);
	if (!readbuf) {
		printk(PRINT_PREF "error: cannot allocate memory\n");
		goto out;
	}
	writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);
	if (!writebuf) {
		printk(PRINT_PREF "error: cannot allocate memory\n");
		goto out;
	}

	err = scan_for_bad_eraseblocks();
	if (err)
		goto out;

	use_offset = 0;
	use_len = mtd->ecclayout->oobavail;
	use_len_max = mtd->ecclayout->oobavail;
	vary_offset = 0;

	
	printk(PRINT_PREF "test 1 of 5\n");

	err = erase_whole_device();
	if (err)
		goto out;

	simple_srand(1);
	err = write_whole_device();
	if (err)
		goto out;

	simple_srand(1);
	err = verify_all_eraseblocks();
	if (err)
		goto out;

	
	printk(PRINT_PREF "test 2 of 5\n");

	err = erase_whole_device();
	if (err)
		goto out;

	simple_srand(3);
	err = write_whole_device();
	if (err)
		goto out;

	
	simple_srand(3);
	printk(PRINT_PREF "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)
			printk(PRINT_PREF "verified up to eraseblock %u\n", i);
		cond_resched();
	}
	printk(PRINT_PREF "verified %u eraseblocks\n", i);

	
	printk(PRINT_PREF "test 3 of 5\n");

	err = erase_whole_device();
	if (err)
		goto out;

	
	use_offset = 0;
	use_len = mtd->ecclayout->oobavail;
	use_len_max = mtd->ecclayout->oobavail;
	vary_offset = 1;
	simple_srand(5);
	printk(PRINT_PREF "writing OOBs of whole device\n");
	for (i = 0; i < ebcnt; ++i) {
		if (bbt[i])
			continue;
		err = write_eraseblock(i);
		if (err)
			goto out;
		if (i % 256 == 0)
			printk(PRINT_PREF "written up to eraseblock %u\n", i);
		cond_resched();
	}
	printk(PRINT_PREF "written %u eraseblocks\n", i);

	
	use_offset = 0;
	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;

	
	printk(PRINT_PREF "test 4 of 5\n");

	err = erase_whole_device();
	if (err)
		goto out;

	addr0 = 0;
	for (i = 0; i < ebcnt && bbt[i]; ++i)
		addr0 += mtd->erasesize;

	
	ops.mode      = MTD_OOB_AUTO;
	ops.len       = 0;
	ops.retlen    = 0;
	ops.ooblen    = 1;
	ops.oobretlen = 0;
	ops.ooboffs   = mtd->ecclayout->oobavail;
	ops.datbuf    = NULL;
	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;
	}

	
	ops.mode      = MTD_OOB_AUTO;
	ops.len       = 0;
	ops.retlen    = 0;
	ops.ooblen    = 1;
	ops.oobretlen = 0;
	ops.ooboffs   = mtd->ecclayout->oobavail;
	ops.datbuf    = NULL;
	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 {
		
		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    = NULL;
		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;
		}

		
		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    = NULL;
		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;

		
		ops.mode      = MTD_OOB_AUTO;
		ops.len       = 0;
		ops.retlen    = 0;
		ops.ooblen    = mtd->ecclayout->oobavail;
		ops.oobretlen = 0;
		ops.ooboffs   = 1;
		ops.datbuf    = NULL;
		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;
		}

		
		ops.mode      = MTD_OOB_AUTO;
		ops.len       = 0;
		ops.retlen    = 0;
		ops.ooblen    = mtd->ecclayout->oobavail;
		ops.oobretlen = 0;
		ops.ooboffs   = 1;
		ops.datbuf    = NULL;
		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;
		}
	}

	
	printk(PRINT_PREF "test 5 of 5\n");

	
	err = erase_whole_device();
	if (err)
		goto out;

	
	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    = NULL;
			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);

	
	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    = NULL;
		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;
}
예제 #2
0
파일: oobtest.c 프로젝트: 3null/linux
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_is_nand(mtd)) {
		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 = (loff_t)(i + 1) * mtd->erasesize - mtd->writesize;
		prandom_bytes_state(&rnd_state, writebuf, sz * cnt);
		for (pg = 0; pg < cnt; ++pg) {
			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 + pg * sz;
			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 = (loff_t)(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;
}