diff options
Diffstat (limited to 'drivers/mtd/tests/mtd_pagetest.c')
| -rw-r--r-- | drivers/mtd/tests/mtd_pagetest.c | 632 |
1 files changed, 632 insertions, 0 deletions
diff --git a/drivers/mtd/tests/mtd_pagetest.c b/drivers/mtd/tests/mtd_pagetest.c new file mode 100644 index 000000000000..9648818b9e2c --- /dev/null +++ b/drivers/mtd/tests/mtd_pagetest.c @@ -0,0 +1,632 @@ +/* + * 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 page read and write on MTD device. + * + * Author: Adrian Hunter <ext-adrian.hunter@nokia.com> + */ + +#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/sched.h> + +#define PRINT_PREF KERN_INFO "mtd_pagetest: " + +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 *twopages; +static unsigned char *writebuf; +static unsigned char *boundary; +static unsigned char *bbt; + +static int pgsize; +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 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 write_eraseblock(int ebnum) +{ + int err = 0; + size_t written = 0; + loff_t addr = ebnum * mtd->erasesize; + + set_random_data(writebuf, mtd->erasesize); + cond_resched(); + err = mtd->write(mtd, addr, mtd->erasesize, &written, writebuf); + if (err || written != mtd->erasesize) + printk(PRINT_PREF "error: write failed at %#llx\n", + (long long)addr); + + return err; +} + +static int verify_eraseblock(int ebnum) +{ + uint32_t j; + size_t read = 0; + int err = 0, i; + loff_t addr0, addrn; + loff_t addr = ebnum * mtd->erasesize; + + addr0 = 0; + for (i = 0; bbt[i] && i < ebcnt; ++i) + addr0 += mtd->erasesize; + + addrn = mtd->size; + for (i = 0; bbt[ebcnt - i - 1] && i < ebcnt; ++i) + addrn -= mtd->erasesize; + + set_random_data(writebuf, mtd->erasesize); + for (j = 0; j < pgcnt - 1; ++j, addr += pgsize) { + /* Do a read to set the internal dataRAMs to different data */ + err = mtd->read(mtd, addr0, bufsize, &read, twopages); + if (err == -EUCLEAN) + err = 0; + if (err || read != bufsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)addr0); + return err; + } + err = mtd->read(mtd, addrn - bufsize, bufsize, &read, twopages); + if (err == -EUCLEAN) + err = 0; + if (err || read != bufsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)(addrn - bufsize)); + return err; + } + memset(twopages, 0, bufsize); + read = 0; + err = mtd->read(mtd, addr, bufsize, &read, twopages); + if (err == -EUCLEAN) + err = 0; + if (err || read != bufsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)addr); + break; + } + if (memcmp(twopages, writebuf + (j * pgsize), bufsize)) { + printk(PRINT_PREF "error: verify failed at %#llx\n", + (long long)addr); + errcnt += 1; + } + } + /* Check boundary between eraseblocks */ + if (addr <= addrn - pgsize - pgsize && !bbt[ebnum + 1]) { + unsigned long oldnext = next; + /* Do a read to set the internal dataRAMs to different data */ + err = mtd->read(mtd, addr0, bufsize, &read, twopages); + if (err == -EUCLEAN) + err = 0; + if (err || read != bufsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)addr0); + return err; + } + err = mtd->read(mtd, addrn - bufsize, bufsize, &read, twopages); + if (err == -EUCLEAN) + err = 0; + if (err || read != bufsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)(addrn - bufsize)); + return err; + } + memset(twopages, 0, bufsize); + read = 0; + err = mtd->read(mtd, addr, bufsize, &read, twopages); + if (err == -EUCLEAN) + err = 0; + if (err || read != bufsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)addr); + return err; + } + memcpy(boundary, writebuf + mtd->erasesize - pgsize, pgsize); + set_random_data(boundary + pgsize, pgsize); + if (memcmp(twopages, boundary, bufsize)) { + printk(PRINT_PREF "error: verify failed at %#llx\n", + (long long)addr); + errcnt += 1; + } + next = oldnext; + } + return err; +} + +static int crosstest(void) +{ + size_t read = 0; + int err = 0, i; + loff_t addr, addr0, addrn; + unsigned char *pp1, *pp2, *pp3, *pp4; + + printk(PRINT_PREF "crosstest\n"); + pp1 = kmalloc(pgsize * 4, GFP_KERNEL); + if (!pp1) { + printk(PRINT_PREF "error: cannot allocate memory\n"); + return -ENOMEM; + } + pp2 = pp1 + pgsize; + pp3 = pp2 + pgsize; + pp4 = pp3 + pgsize; + memset(pp1, 0, pgsize * 4); + + addr0 = 0; + for (i = 0; bbt[i] && i < ebcnt; ++i) + addr0 += mtd->erasesize; + + addrn = mtd->size; + for (i = 0; bbt[ebcnt - i - 1] && i < ebcnt; ++i) + addrn -= mtd->erasesize; + + /* Read 2nd-to-last page to pp1 */ + read = 0; + addr = addrn - pgsize - pgsize; + err = mtd->read(mtd, addr, pgsize, &read, pp1); + if (err == -EUCLEAN) + err = 0; + if (err || read != pgsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)addr); + kfree(pp1); + return err; + } + + /* Read 3rd-to-last page to pp1 */ + read = 0; + addr = addrn - pgsize - pgsize - pgsize; + err = mtd->read(mtd, addr, pgsize, &read, pp1); + if (err == -EUCLEAN) + err = 0; + if (err || read != pgsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)addr); + kfree(pp1); + return err; + } + + /* Read first page to pp2 */ + read = 0; + addr = addr0; + printk(PRINT_PREF "reading page at %#llx\n", (long long)addr); + err = mtd->read(mtd, addr, pgsize, &read, pp2); + if (err == -EUCLEAN) + err = 0; + if (err || read != pgsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)addr); + kfree(pp1); + return err; + } + + /* Read last page to pp3 */ + read = 0; + addr = addrn - pgsize; + printk(PRINT_PREF "reading page at %#llx\n", (long long)addr); + err = mtd->read(mtd, addr, pgsize, &read, pp3); + if (err == -EUCLEAN) + err = 0; + if (err || read != pgsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)addr); + kfree(pp1); + return err; + } + + /* Read first page again to pp4 */ + read = 0; + addr = addr0; + printk(PRINT_PREF "reading page at %#llx\n", (long long)addr); + err = mtd->read(mtd, addr, pgsize, &read, pp4); + if (err == -EUCLEAN) + err = 0; + if (err || read != pgsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)addr); + kfree(pp1); + return err; + } + + /* pp2 and pp4 should be the same */ + printk(PRINT_PREF "verifying pages read at %#llx match\n", + (long long)addr0); + if (memcmp(pp2, pp4, pgsize)) { + printk(PRINT_PREF "verify failed!\n"); + errcnt += 1; + } else if (!err) + printk(PRINT_PREF "crosstest ok\n"); + kfree(pp1); + return err; +} + +static int erasecrosstest(void) +{ + size_t read = 0, written = 0; + int err = 0, i, ebnum, ok = 1, ebnum2; + loff_t addr0; + char *readbuf = twopages; + + printk(PRINT_PREF "erasecrosstest\n"); + + ebnum = 0; + addr0 = 0; + for (i = 0; bbt[i] && i < ebcnt; ++i) { + addr0 += mtd->erasesize; + ebnum += 1; + } + + ebnum2 = ebcnt - 1; + while (ebnum2 && bbt[ebnum2]) + ebnum2 -= 1; + + printk(PRINT_PREF "erasing block %d\n", ebnum); + err = erase_eraseblock(ebnum); + if (err) + return err; + + printk(PRINT_PREF "writing 1st page of block %d\n", ebnum); + set_random_data(writebuf, pgsize); + strcpy(writebuf, "There is no data like this!"); + err = mtd->write(mtd, addr0, pgsize, &written, writebuf); + if (err || written != pgsize) { + printk(PRINT_PREF "error: write failed at %#llx\n", + (long long)addr0); + return err ? err : -1; + } + + printk(PRINT_PREF "reading 1st page of block %d\n", ebnum); + memset(readbuf, 0, pgsize); + err = mtd->read(mtd, addr0, pgsize, &read, readbuf); + if (err == -EUCLEAN) + err = 0; + if (err || read != pgsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)addr0); + return err ? err : -1; + } + + printk(PRINT_PREF "verifying 1st page of block %d\n", ebnum); + if (memcmp(writebuf, readbuf, pgsize)) { + printk(PRINT_PREF "verify failed!\n"); + errcnt += 1; + ok = 0; + return err; + } + + printk(PRINT_PREF "erasing block %d\n", ebnum); + err = erase_eraseblock(ebnum); + if (err) + return err; + + printk(PRINT_PREF "writing 1st page of block %d\n", ebnum); + set_random_data(writebuf, pgsize); + strcpy(writebuf, "There is no data like this!"); + err = mtd->write(mtd, addr0, pgsize, &written, writebuf); + if (err || written != pgsize) { + printk(PRINT_PREF "error: write failed at %#llx\n", + (long long)addr0); + return err ? err : -1; + } + + printk(PRINT_PREF "erasing block %d\n", ebnum2); + err = erase_eraseblock(ebnum2); + if (err) + return err; + + printk(PRINT_PREF "reading 1st page of block %d\n", ebnum); + memset(readbuf, 0, pgsize); + err = mtd->read(mtd, addr0, pgsize, &read, readbuf); + if (err == -EUCLEAN) + err = 0; + if (err || read != pgsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)addr0); + return err ? err : -1; + } + + printk(PRINT_PREF "verifying 1st page of block %d\n", ebnum); + if (memcmp(writebuf, readbuf, pgsize)) { + printk(PRINT_PREF "verify failed!\n"); + errcnt += 1; + ok = 0; + } + + if (ok && !err) + printk(PRINT_PREF "erasecrosstest ok\n"); + return err; +} + +static int erasetest(void) +{ + size_t read = 0, written = 0; + int err = 0, i, ebnum, ok = 1; + loff_t addr0; + + printk(PRINT_PREF "erasetest\n"); + + ebnum = 0; + addr0 = 0; + for (i = 0; bbt[i] && i < ebcnt; ++i) { + addr0 += mtd->erasesize; + ebnum += 1; + } + + printk(PRINT_PREF "erasing block %d\n", ebnum); + err = erase_eraseblock(ebnum); + if (err) + return err; + + printk(PRINT_PREF "writing 1st page of block %d\n", ebnum); + set_random_data(writebuf, pgsize); + err = mtd->write(mtd, addr0, pgsize, &written, writebuf); + if (err || written != pgsize) { + printk(PRINT_PREF "error: write failed at %#llx\n", + (long long)addr0); + return err ? err : -1; + } + + printk(PRINT_PREF "erasing block %d\n", ebnum); + err = erase_eraseblock(ebnum); + if (err) + return err; + + printk(PRINT_PREF "reading 1st page of block %d\n", ebnum); + err = mtd->read(mtd, addr0, pgsize, &read, twopages); + if (err == -EUCLEAN) + err = 0; + if (err || read != pgsize) { + printk(PRINT_PREF "error: read failed at %#llx\n", + (long long)addr0); + return err ? err : -1; + } + + printk(PRINT_PREF "verifying 1st page of block %d is all 0xff\n", + ebnum); + for (i = 0; i < pgsize; ++i) + if (twopages[i] != 0xff) { + printk(PRINT_PREF "verifying all 0xff failed at %d\n", + i); + errcnt += 1; + ok = 0; + break; + } + + if (ok && !err) + printk(PRINT_PREF "erasetest ok\n"); + + return err; +} + +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 = kmalloc(ebcnt, GFP_KERNEL); + if (!bbt) { + printk(PRINT_PREF "error: cannot allocate memory\n"); + return -ENOMEM; + } + memset(bbt, 0 , ebcnt); + + 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_pagetest_init(void) +{ + int err = 0; + uint64_t tmp; + uint32_t i; + + 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, + pgsize, ebcnt, pgcnt, mtd->oobsize); + + err = -ENOMEM; + bufsize = pgsize * 2; + writebuf = kmalloc(mtd->erasesize, GFP_KERNEL); + if (!writebuf) { + printk(PRINT_PREF "error: cannot allocate memory\n"); + goto out; + } + twopages = kmalloc(bufsize, GFP_KERNEL); + if (!twopages) { + printk(PRINT_PREF "error: cannot allocate memory\n"); + goto out; + } + boundary = kmalloc(bufsize, GFP_KERNEL); + if (!boundary) { + printk(PRINT_PREF "error: cannot allocate memory\n"); + goto out; + } + + err = scan_for_bad_eraseblocks(); + if (err) + goto out; + + /* Erase all eraseblocks */ + printk(PRINT_PREF "erasing whole device\n"); + for (i = 0; i < ebcnt; ++i) { + if (bbt[i]) + continue; + err = erase_eraseblock(i); + if (err) + goto out; + cond_resched(); + } + printk(PRINT_PREF "erased %u eraseblocks\n", i); + + /* Write all eraseblocks */ + simple_srand(1); + printk(PRINT_PREF "writing 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); + + /* Check all eraseblocks */ + 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 (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 = crosstest(); + if (err) + goto out; + + err = erasecrosstest(); + if (err) + goto out; + + err = erasetest(); + if (err) + goto out; + + printk(PRINT_PREF "finished with %d errors\n", errcnt); +out: + + kfree(bbt); + kfree(boundary); + kfree(twopages); + 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_pagetest_init); + +static void __exit mtd_pagetest_exit(void) +{ + return; +} +module_exit(mtd_pagetest_exit); + +MODULE_DESCRIPTION("NAND page test"); +MODULE_AUTHOR("Adrian Hunter"); +MODULE_LICENSE("GPL"); |