| /* | |
| * Copyright (C) 2006-2007 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 sub-page read and write on MTD device. | |
| * Author: Adrian Hunter <ext-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 struct mtd_info *mtd; | |
| static unsigned char *writebuf; | |
| static unsigned char *readbuf; | |
| static unsigned char *bbt; | |
| static int subpgsize; | |
| static int bufsize; | |
| static int ebcnt; | |
| static int pgcnt; | |
| static int errcnt; | |
| static struct rnd_state rnd_state; | |
| static inline void clear_data(unsigned char *buf, size_t len) | |
| { | |
| memset(buf, 0, len); | |
| } | |
| static int write_eraseblock(int ebnum) | |
| { | |
| size_t written; | |
| int err = 0; | |
| loff_t addr = (loff_t)ebnum * mtd->erasesize; | |
| prandom_bytes_state(&rnd_state, writebuf, subpgsize); | |
| err = mtd_write(mtd, addr, subpgsize, &written, writebuf); | |
| if (unlikely(err || written != subpgsize)) { | |
| pr_err("error: write failed at %#llx\n", | |
| (long long)addr); | |
| if (written != subpgsize) { | |
| pr_err(" write size: %#x\n", subpgsize); | |
| pr_err(" written: %#zx\n", written); | |
| } | |
| return err ? err : -1; | |
| } | |
| addr += subpgsize; | |
| prandom_bytes_state(&rnd_state, writebuf, subpgsize); | |
| err = mtd_write(mtd, addr, subpgsize, &written, writebuf); | |
| if (unlikely(err || written != subpgsize)) { | |
| pr_err("error: write failed at %#llx\n", | |
| (long long)addr); | |
| if (written != subpgsize) { | |
| pr_err(" write size: %#x\n", subpgsize); | |
| pr_err(" written: %#zx\n", written); | |
| } | |
| return err ? err : -1; | |
| } | |
| return err; | |
| } | |
| static int write_eraseblock2(int ebnum) | |
| { | |
| size_t written; | |
| int err = 0, k; | |
| loff_t addr = (loff_t)ebnum * mtd->erasesize; | |
| for (k = 1; k < 33; ++k) { | |
| if (addr + (subpgsize * k) > (loff_t)(ebnum + 1) * mtd->erasesize) | |
| break; | |
| prandom_bytes_state(&rnd_state, writebuf, subpgsize * k); | |
| err = mtd_write(mtd, addr, subpgsize * k, &written, writebuf); | |
| if (unlikely(err || written != subpgsize * k)) { | |
| pr_err("error: write failed at %#llx\n", | |
| (long long)addr); | |
| if (written != subpgsize * k) { | |
| pr_err(" write size: %#x\n", | |
| subpgsize * k); | |
| pr_err(" written: %#08zx\n", | |
| written); | |
| } | |
| return err ? err : -1; | |
| } | |
| addr += subpgsize * k; | |
| } | |
| return err; | |
| } | |
| static void print_subpage(unsigned char *p) | |
| { | |
| int i, j; | |
| for (i = 0; i < subpgsize; ) { | |
| for (j = 0; i < subpgsize && j < 32; ++i, ++j) | |
| printk("%02x", *p++); | |
| printk("\n"); | |
| } | |
| } | |
| static int verify_eraseblock(int ebnum) | |
| { | |
| size_t read; | |
| int err = 0; | |
| loff_t addr = (loff_t)ebnum * mtd->erasesize; | |
| prandom_bytes_state(&rnd_state, writebuf, subpgsize); | |
| clear_data(readbuf, subpgsize); | |
| err = mtd_read(mtd, addr, subpgsize, &read, readbuf); | |
| if (unlikely(err || read != subpgsize)) { | |
| if (mtd_is_bitflip(err) && read == subpgsize) { | |
| pr_info("ECC correction at %#llx\n", | |
| (long long)addr); | |
| err = 0; | |
| } else { | |
| pr_err("error: read failed at %#llx\n", | |
| (long long)addr); | |
| return err ? err : -1; | |
| } | |
| } | |
| if (unlikely(memcmp(readbuf, writebuf, subpgsize))) { | |
| pr_err("error: verify failed at %#llx\n", | |
| (long long)addr); | |
| pr_info("------------- written----------------\n"); | |
| print_subpage(writebuf); | |
| pr_info("------------- read ------------------\n"); | |
| print_subpage(readbuf); | |
| pr_info("-------------------------------------\n"); | |
| errcnt += 1; | |
| } | |
| addr += subpgsize; | |
| prandom_bytes_state(&rnd_state, writebuf, subpgsize); | |
| clear_data(readbuf, subpgsize); | |
| err = mtd_read(mtd, addr, subpgsize, &read, readbuf); | |
| if (unlikely(err || read != subpgsize)) { | |
| if (mtd_is_bitflip(err) && read == subpgsize) { | |
| pr_info("ECC correction at %#llx\n", | |
| (long long)addr); | |
| err = 0; | |
| } else { | |
| pr_err("error: read failed at %#llx\n", | |
| (long long)addr); | |
| return err ? err : -1; | |
| } | |
| } | |
| if (unlikely(memcmp(readbuf, writebuf, subpgsize))) { | |
| pr_info("error: verify failed at %#llx\n", | |
| (long long)addr); | |
| pr_info("------------- written----------------\n"); | |
| print_subpage(writebuf); | |
| pr_info("------------- read ------------------\n"); | |
| print_subpage(readbuf); | |
| pr_info("-------------------------------------\n"); | |
| errcnt += 1; | |
| } | |
| return err; | |
| } | |
| static int verify_eraseblock2(int ebnum) | |
| { | |
| size_t read; | |
| int err = 0, k; | |
| loff_t addr = (loff_t)ebnum * mtd->erasesize; | |
| for (k = 1; k < 33; ++k) { | |
| if (addr + (subpgsize * k) > (loff_t)(ebnum + 1) * mtd->erasesize) | |
| break; | |
| prandom_bytes_state(&rnd_state, writebuf, subpgsize * k); | |
| clear_data(readbuf, subpgsize * k); | |
| err = mtd_read(mtd, addr, subpgsize * k, &read, readbuf); | |
| if (unlikely(err || read != subpgsize * k)) { | |
| if (mtd_is_bitflip(err) && read == subpgsize * k) { | |
| pr_info("ECC correction at %#llx\n", | |
| (long long)addr); | |
| err = 0; | |
| } else { | |
| pr_err("error: read failed at " | |
| "%#llx\n", (long long)addr); | |
| return err ? err : -1; | |
| } | |
| } | |
| if (unlikely(memcmp(readbuf, writebuf, subpgsize * k))) { | |
| pr_err("error: verify failed at %#llx\n", | |
| (long long)addr); | |
| errcnt += 1; | |
| } | |
| addr += subpgsize * k; | |
| } | |
| return err; | |
| } | |
| static int verify_eraseblock_ff(int ebnum) | |
| { | |
| uint32_t j; | |
| size_t read; | |
| int err = 0; | |
| loff_t addr = (loff_t)ebnum * mtd->erasesize; | |
| memset(writebuf, 0xff, subpgsize); | |
| for (j = 0; j < mtd->erasesize / subpgsize; ++j) { | |
| clear_data(readbuf, subpgsize); | |
| err = mtd_read(mtd, addr, subpgsize, &read, readbuf); | |
| if (unlikely(err || read != subpgsize)) { | |
| if (mtd_is_bitflip(err) && read == subpgsize) { | |
| pr_info("ECC correction at %#llx\n", | |
| (long long)addr); | |
| err = 0; | |
| } else { | |
| pr_err("error: read failed at " | |
| "%#llx\n", (long long)addr); | |
| return err ? err : -1; | |
| } | |
| } | |
| if (unlikely(memcmp(readbuf, writebuf, subpgsize))) { | |
| pr_err("error: verify 0xff failed at " | |
| "%#llx\n", (long long)addr); | |
| errcnt += 1; | |
| } | |
| addr += subpgsize; | |
| } | |
| return err; | |
| } | |
| static int verify_all_eraseblocks_ff(void) | |
| { | |
| int err; | |
| unsigned int i; | |
| pr_info("verifying all eraseblocks for 0xff\n"); | |
| for (i = 0; i < ebcnt; ++i) { | |
| if (bbt[i]) | |
| continue; | |
| err = verify_eraseblock_ff(i); | |
| if (err) | |
| return err; | |
| if (i % 256 == 0) | |
| pr_info("verified up to eraseblock %u\n", i); | |
| err = mtdtest_relax(); | |
| if (err) | |
| return err; | |
| } | |
| pr_info("verified %u eraseblocks\n", i); | |
| return 0; | |
| } | |
| static int __init mtd_subpagetest_init(void) | |
| { | |
| int err = 0; | |
| uint32_t i; | |
| 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; | |
| } | |
| 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; | |
| } | |
| subpgsize = mtd->writesize >> mtd->subpage_sft; | |
| 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, subpage size %u, count of eraseblocks %u, " | |
| "pages per eraseblock %u, OOB size %u\n", | |
| (unsigned long long)mtd->size, mtd->erasesize, | |
| mtd->writesize, subpgsize, ebcnt, pgcnt, mtd->oobsize); | |
| err = -ENOMEM; | |
| bufsize = subpgsize * 32; | |
| writebuf = kmalloc(bufsize, GFP_KERNEL); | |
| if (!writebuf) | |
| goto out; | |
| readbuf = kmalloc(bufsize, GFP_KERNEL); | |
| if (!readbuf) | |
| 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; | |
| err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); | |
| if (err) | |
| goto out; | |
| pr_info("writing whole device\n"); | |
| prandom_seed_state(&rnd_state, 1); | |
| for (i = 0; i < ebcnt; ++i) { | |
| if (bbt[i]) | |
| continue; | |
| err = write_eraseblock(i); | |
| if (unlikely(err)) | |
| goto out; | |
| if (i % 256 == 0) | |
| pr_info("written up to eraseblock %u\n", i); | |
| err = mtdtest_relax(); | |
| if (err) | |
| goto out; | |
| } | |
| pr_info("written %u eraseblocks\n", i); | |
| prandom_seed_state(&rnd_state, 1); | |
| pr_info("verifying all eraseblocks\n"); | |
| for (i = 0; i < ebcnt; ++i) { | |
| if (bbt[i]) | |
| continue; | |
| err = verify_eraseblock(i); | |
| if (unlikely(err)) | |
| goto out; | |
| if (i % 256 == 0) | |
| pr_info("verified up to eraseblock %u\n", i); | |
| err = mtdtest_relax(); | |
| if (err) | |
| goto out; | |
| } | |
| pr_info("verified %u eraseblocks\n", i); | |
| err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); | |
| if (err) | |
| goto out; | |
| err = verify_all_eraseblocks_ff(); | |
| if (err) | |
| goto out; | |
| /* Write all eraseblocks */ | |
| prandom_seed_state(&rnd_state, 3); | |
| pr_info("writing whole device\n"); | |
| for (i = 0; i < ebcnt; ++i) { | |
| if (bbt[i]) | |
| continue; | |
| err = write_eraseblock2(i); | |
| if (unlikely(err)) | |
| goto out; | |
| if (i % 256 == 0) | |
| pr_info("written up to eraseblock %u\n", i); | |
| err = mtdtest_relax(); | |
| if (err) | |
| goto out; | |
| } | |
| pr_info("written %u eraseblocks\n", i); | |
| /* 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_eraseblock2(i); | |
| if (unlikely(err)) | |
| goto out; | |
| if (i % 256 == 0) | |
| pr_info("verified up to eraseblock %u\n", i); | |
| err = mtdtest_relax(); | |
| if (err) | |
| goto out; | |
| } | |
| pr_info("verified %u eraseblocks\n", i); | |
| err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); | |
| if (err) | |
| goto out; | |
| err = verify_all_eraseblocks_ff(); | |
| if (err) | |
| goto out; | |
| pr_info("finished with %d errors\n", errcnt); | |
| out: | |
| kfree(bbt); | |
| kfree(readbuf); | |
| kfree(writebuf); | |
| put_mtd_device(mtd); | |
| if (err) | |
| pr_info("error %d occurred\n", err); | |
| printk(KERN_INFO "=================================================\n"); | |
| return err; | |
| } | |
| module_init(mtd_subpagetest_init); | |
| static void __exit mtd_subpagetest_exit(void) | |
| { | |
| return; | |
| } | |
| module_exit(mtd_subpagetest_exit); | |
| MODULE_DESCRIPTION("Subpage test module"); | |
| MODULE_AUTHOR("Adrian Hunter"); | |
| MODULE_LICENSE("GPL"); |