diff options
Diffstat (limited to 'drivers/mtd/tests/mtd_subpagetest.c')
| -rw-r--r-- | drivers/mtd/tests/mtd_subpagetest.c | 525 |
1 files changed, 0 insertions, 525 deletions
diff --git a/drivers/mtd/tests/mtd_subpagetest.c b/drivers/mtd/tests/mtd_subpagetest.c deleted file mode 100644 index 11204e8aab5..00000000000 --- a/drivers/mtd/tests/mtd_subpagetest.c +++ /dev/null @@ -1,525 +0,0 @@ -/* - * 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> - * - */ - -#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> - -#define PRINT_PREF KERN_INFO "mtd_subpagetest: " - -static int dev; -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 unsigned long next = 1; - -static inline unsigned int simple_rand(void) -{ - next = next * 1103515245 + 12345; - return (unsigned int)((next / 65536) % 32768); -} - -static inline void simple_srand(unsigned long seed) -{ - next = seed; -} - -static void set_random_data(unsigned char *buf, size_t len) -{ - size_t i; - - for (i = 0; i < len; ++i) - buf[i] = simple_rand(); -} - -static inline void clear_data(unsigned char *buf, size_t len) -{ - memset(buf, 0, len); -} - -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) { - printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum); - return err; - } - - if (ei.state == MTD_ERASE_FAILED) { - printk(PRINT_PREF "some erase error occurred at EB %d\n", - ebnum); - return -EIO; - } - - return 0; -} - -static int erase_whole_device(void) -{ - int err; - unsigned int i; - - printk(PRINT_PREF "erasing whole device\n"); - for (i = 0; i < ebcnt; ++i) { - if (bbt[i]) - continue; - err = erase_eraseblock(i); - if (err) - return err; - cond_resched(); - } - printk(PRINT_PREF "erased %u eraseblocks\n", i); - return 0; -} - -static int write_eraseblock(int ebnum) -{ - size_t written = 0; - int err = 0; - loff_t addr = ebnum * mtd->erasesize; - - set_random_data(writebuf, subpgsize); - err = mtd->write(mtd, addr, subpgsize, &written, writebuf); - if (unlikely(err || written != subpgsize)) { - printk(PRINT_PREF "error: write failed at %#llx\n", - (long long)addr); - if (written != subpgsize) { - printk(PRINT_PREF " write size: %#x\n", subpgsize); - printk(PRINT_PREF " written: %#zx\n", written); - } - return err ? err : -1; - } - - addr += subpgsize; - - set_random_data(writebuf, subpgsize); - err = mtd->write(mtd, addr, subpgsize, &written, writebuf); - if (unlikely(err || written != subpgsize)) { - printk(PRINT_PREF "error: write failed at %#llx\n", - (long long)addr); - if (written != subpgsize) { - printk(PRINT_PREF " write size: %#x\n", subpgsize); - printk(PRINT_PREF " written: %#zx\n", written); - } - return err ? err : -1; - } - - return err; -} - -static int write_eraseblock2(int ebnum) -{ - size_t written = 0; - int err = 0, k; - loff_t addr = ebnum * mtd->erasesize; - - for (k = 1; k < 33; ++k) { - if (addr + (subpgsize * k) > (ebnum + 1) * mtd->erasesize) - break; - set_random_data(writebuf, subpgsize * k); - err = mtd->write(mtd, addr, subpgsize * k, &written, writebuf); - if (unlikely(err || written != subpgsize * k)) { - printk(PRINT_PREF "error: write failed at %#llx\n", - (long long)addr); - if (written != subpgsize) { - printk(PRINT_PREF " write size: %#x\n", - subpgsize * k); - printk(PRINT_PREF " 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 = 0; - int err = 0; - loff_t addr = ebnum * mtd->erasesize; - - set_random_data(writebuf, subpgsize); - clear_data(readbuf, subpgsize); - read = 0; - err = mtd->read(mtd, addr, subpgsize, &read, readbuf); - if (unlikely(err || read != subpgsize)) { - if (err == -EUCLEAN && read == subpgsize) { - printk(PRINT_PREF "ECC correction at %#llx\n", - (long long)addr); - err = 0; - } else { - printk(PRINT_PREF "error: read failed at %#llx\n", - (long long)addr); - return err ? err : -1; - } - } - if (unlikely(memcmp(readbuf, writebuf, subpgsize))) { - printk(PRINT_PREF "error: verify failed at %#llx\n", - (long long)addr); - printk(PRINT_PREF "------------- written----------------\n"); - print_subpage(writebuf); - printk(PRINT_PREF "------------- read ------------------\n"); - print_subpage(readbuf); - printk(PRINT_PREF "-------------------------------------\n"); - errcnt += 1; - } - - addr += subpgsize; - - set_random_data(writebuf, subpgsize); - clear_data(readbuf, subpgsize); - read = 0; - err = mtd->read(mtd, addr, subpgsize, &read, readbuf); - if (unlikely(err || read != subpgsize)) { - if (err == -EUCLEAN && read == subpgsize) { - printk(PRINT_PREF "ECC correction at %#llx\n", - (long long)addr); - err = 0; - } else { - printk(PRINT_PREF "error: read failed at %#llx\n", - (long long)addr); - return err ? err : -1; - } - } - if (unlikely(memcmp(readbuf, writebuf, subpgsize))) { - printk(PRINT_PREF "error: verify failed at %#llx\n", - (long long)addr); - printk(PRINT_PREF "------------- written----------------\n"); - print_subpage(writebuf); - printk(PRINT_PREF "------------- read ------------------\n"); - print_subpage(readbuf); - printk(PRINT_PREF "-------------------------------------\n"); - errcnt += 1; - } - - return err; -} - -static int verify_eraseblock2(int ebnum) -{ - size_t read = 0; - int err = 0, k; - loff_t addr = ebnum * mtd->erasesize; - - for (k = 1; k < 33; ++k) { - if (addr + (subpgsize * k) > (ebnum + 1) * mtd->erasesize) - break; - set_random_data(writebuf, subpgsize * k); - clear_data(readbuf, subpgsize * k); - read = 0; - err = mtd->read(mtd, addr, subpgsize * k, &read, readbuf); - if (unlikely(err || read != subpgsize * k)) { - if (err == -EUCLEAN && read == subpgsize * k) { - printk(PRINT_PREF "ECC correction at %#llx\n", - (long long)addr); - err = 0; - } else { - printk(PRINT_PREF "error: read failed at " - "%#llx\n", (long long)addr); - return err ? err : -1; - } - } - if (unlikely(memcmp(readbuf, writebuf, subpgsize * k))) { - printk(PRINT_PREF "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 = 0; - int err = 0; - loff_t addr = ebnum * mtd->erasesize; - - memset(writebuf, 0xff, subpgsize); - for (j = 0; j < mtd->erasesize / subpgsize; ++j) { - clear_data(readbuf, subpgsize); - read = 0; - err = mtd->read(mtd, addr, subpgsize, &read, readbuf); - if (unlikely(err || read != subpgsize)) { - if (err == -EUCLEAN && read == subpgsize) { - printk(PRINT_PREF "ECC correction at %#llx\n", - (long long)addr); - err = 0; - } else { - printk(PRINT_PREF "error: read failed at " - "%#llx\n", (long long)addr); - return err ? err : -1; - } - } - if (unlikely(memcmp(readbuf, writebuf, subpgsize))) { - printk(PRINT_PREF "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; - - printk(PRINT_PREF "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) - printk(PRINT_PREF "verified up to eraseblock %u\n", i); - cond_resched(); - } - printk(PRINT_PREF "verified %u eraseblocks\n", i); - return 0; -} - -static int is_block_bad(int ebnum) -{ - loff_t addr = ebnum * mtd->erasesize; - int ret; - - ret = mtd->block_isbad(mtd, addr); - if (ret) - printk(PRINT_PREF "block %d is bad\n", ebnum); - return ret; -} - -static int scan_for_bad_eraseblocks(void) -{ - int i, bad = 0; - - bbt = kzalloc(ebcnt, GFP_KERNEL); - if (!bbt) { - printk(PRINT_PREF "error: cannot allocate memory\n"); - return -ENOMEM; - } - - printk(PRINT_PREF "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(); - } - printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad); - 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"); - 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; - } - - subpgsize = mtd->writesize >> mtd->subpage_sft; - printk(PRINT_PREF "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) { - printk(PRINT_PREF "error: cannot allocate memory\n"); - goto out; - } - readbuf = kmalloc(bufsize, GFP_KERNEL); - if (!readbuf) { - printk(PRINT_PREF "error: cannot allocate memory\n"); - goto out; - } - - tmp = mtd->size; - do_div(tmp, mtd->erasesize); - ebcnt = tmp; - pgcnt = mtd->erasesize / mtd->writesize; - - err = scan_for_bad_eraseblocks(); - if (err) - goto out; - - err = erase_whole_device(); - if (err) - goto out; - - printk(PRINT_PREF "writing whole device\n"); - simple_srand(1); - for (i = 0; i < ebcnt; ++i) { - if (bbt[i]) - continue; - err = write_eraseblock(i); - if (unlikely(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); - - simple_srand(1); - printk(PRINT_PREF "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) - printk(PRINT_PREF "verified up to eraseblock %u\n", i); - cond_resched(); - } - printk(PRINT_PREF "verified %u eraseblocks\n", i); - - err = erase_whole_device(); - if (err) - goto out; - - err = verify_all_eraseblocks_ff(); - if (err) - goto out; - - /* Write all eraseblocks */ - simple_srand(3); - printk(PRINT_PREF "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) - printk(PRINT_PREF "written up to eraseblock %u\n", i); - cond_resched(); - } - printk(PRINT_PREF "written %u eraseblocks\n", i); - - /* Check all eraseblocks */ - simple_srand(3); - printk(PRINT_PREF "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) - printk(PRINT_PREF "verified up to eraseblock %u\n", i); - cond_resched(); - } - printk(PRINT_PREF "verified %u eraseblocks\n", i); - - err = erase_whole_device(); - if (err) - goto out; - - err = verify_all_eraseblocks_ff(); - if (err) - goto out; - - printk(PRINT_PREF "finished with %d errors\n", errcnt); - -out: - kfree(bbt); - kfree(readbuf); - kfree(writebuf); - put_mtd_device(mtd); - if (err) - printk(PRINT_PREF "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"); |