| /* |
| * 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/slab.h> |
| #include <linux/sched.h> |
| |
| #define PRINT_PREF KERN_INFO "mtd_pagetest: " |
| |
| 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 *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; i < ebcnt && bbt[i]; ++i) |
| addr0 += mtd->erasesize; |
| |
| addrn = mtd->size; |
| for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++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 (mtd_is_bitflip(err)) |
| 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 (mtd_is_bitflip(err)) |
| 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 (mtd_is_bitflip(err)) |
| 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 (mtd_is_bitflip(err)) |
| 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 (mtd_is_bitflip(err)) |
| 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 (mtd_is_bitflip(err)) |
| 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; i < ebcnt && bbt[i]; ++i) |
| addr0 += mtd->erasesize; |
| |
| addrn = mtd->size; |
| for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++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 (mtd_is_bitflip(err)) |
| 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 (mtd_is_bitflip(err)) |
| 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 (mtd_is_bitflip(err)) |
| 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 (mtd_is_bitflip(err)) |
| 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 (mtd_is_bitflip(err)) |
| 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, ebnum2; |
| loff_t addr0; |
| char *readbuf = twopages; |
| |
| printk(PRINT_PREF "erasecrosstest\n"); |
| |
| ebnum = 0; |
| addr0 = 0; |
| for (i = 0; i < ebcnt && bbt[i]; ++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 (mtd_is_bitflip(err)) |
| 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; |
| return -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 "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 (mtd_is_bitflip(err)) |
| 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; |
| return -1; |
| } |
| |
| if (!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; i < ebcnt && bbt[i]; ++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 (mtd_is_bitflip(err)) |
| 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 = 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_pagetest_init(void) |
| { |
| int err = 0; |
| uint64_t tmp; |
| uint32_t i; |
| |
| printk(KERN_INFO "\n"); |
| printk(KERN_INFO "=================================================\n"); |
| |
| if (dev < 0) { |
| printk(PRINT_PREF "Please specify a valid mtd-device via module paramter\n"); |
| printk(KERN_CRIT "CAREFUL: This test wipes all data on the specified MTD device!\n"); |
| return -EINVAL; |
| } |
| |
| 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; |
| pgsize = 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"); |