| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (C) 2006-2008 Nokia Corporation |
| * |
| * Test page read and write on MTD device. |
| * |
| * Author: Adrian Hunter <ext-adrian.hunter@nokia.com> |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #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> |
| #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 *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 struct rnd_state rnd_state; |
| |
| static int write_eraseblock(int ebnum) |
| { |
| loff_t addr = (loff_t)ebnum * mtd->erasesize; |
| |
| prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize); |
| cond_resched(); |
| return mtdtest_write(mtd, addr, mtd->erasesize, writebuf); |
| } |
| |
| static int verify_eraseblock(int ebnum) |
| { |
| uint32_t j; |
| int err = 0, i; |
| loff_t addr0, addrn; |
| loff_t addr = (loff_t)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; |
| |
| prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize); |
| for (j = 0; j < pgcnt - 1; ++j, addr += pgsize) { |
| /* Do a read to set the internal dataRAMs to different data */ |
| err = mtdtest_read(mtd, addr0, bufsize, twopages); |
| if (err) |
| return err; |
| err = mtdtest_read(mtd, addrn - bufsize, bufsize, twopages); |
| if (err) |
| return err; |
| memset(twopages, 0, bufsize); |
| err = mtdtest_read(mtd, addr, bufsize, twopages); |
| if (err) |
| break; |
| if (memcmp(twopages, writebuf + (j * pgsize), bufsize)) { |
| pr_err("error: verify failed at %#llx\n", |
| (long long)addr); |
| errcnt += 1; |
| } |
| } |
| /* Check boundary between eraseblocks */ |
| if (addr <= addrn - pgsize - pgsize && !bbt[ebnum + 1]) { |
| struct rnd_state old_state = rnd_state; |
| |
| /* Do a read to set the internal dataRAMs to different data */ |
| err = mtdtest_read(mtd, addr0, bufsize, twopages); |
| if (err) |
| return err; |
| err = mtdtest_read(mtd, addrn - bufsize, bufsize, twopages); |
| if (err) |
| return err; |
| memset(twopages, 0, bufsize); |
| err = mtdtest_read(mtd, addr, bufsize, twopages); |
| if (err) |
| return err; |
| memcpy(boundary, writebuf + mtd->erasesize - pgsize, pgsize); |
| prandom_bytes_state(&rnd_state, boundary + pgsize, pgsize); |
| if (memcmp(twopages, boundary, bufsize)) { |
| pr_err("error: verify failed at %#llx\n", |
| (long long)addr); |
| errcnt += 1; |
| } |
| rnd_state = old_state; |
| } |
| return err; |
| } |
| |
| static int crosstest(void) |
| { |
| int err = 0, i; |
| loff_t addr, addr0, addrn; |
| unsigned char *pp1, *pp2, *pp3, *pp4; |
| |
| pr_info("crosstest\n"); |
| pp1 = kcalloc(pgsize, 4, GFP_KERNEL); |
| if (!pp1) |
| return -ENOMEM; |
| pp2 = pp1 + pgsize; |
| pp3 = pp2 + pgsize; |
| pp4 = pp3 + pgsize; |
| |
| 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 */ |
| addr = addrn - pgsize - pgsize; |
| err = mtdtest_read(mtd, addr, pgsize, pp1); |
| if (err) { |
| kfree(pp1); |
| return err; |
| } |
| |
| /* Read 3rd-to-last page to pp1 */ |
| addr = addrn - pgsize - pgsize - pgsize; |
| err = mtdtest_read(mtd, addr, pgsize, pp1); |
| if (err) { |
| kfree(pp1); |
| return err; |
| } |
| |
| /* Read first page to pp2 */ |
| addr = addr0; |
| pr_info("reading page at %#llx\n", (long long)addr); |
| err = mtdtest_read(mtd, addr, pgsize, pp2); |
| if (err) { |
| kfree(pp1); |
| return err; |
| } |
| |
| /* Read last page to pp3 */ |
| addr = addrn - pgsize; |
| pr_info("reading page at %#llx\n", (long long)addr); |
| err = mtdtest_read(mtd, addr, pgsize, pp3); |
| if (err) { |
| kfree(pp1); |
| return err; |
| } |
| |
| /* Read first page again to pp4 */ |
| addr = addr0; |
| pr_info("reading page at %#llx\n", (long long)addr); |
| err = mtdtest_read(mtd, addr, pgsize, pp4); |
| if (err) { |
| kfree(pp1); |
| return err; |
| } |
| |
| /* pp2 and pp4 should be the same */ |
| pr_info("verifying pages read at %#llx match\n", |
| (long long)addr0); |
| if (memcmp(pp2, pp4, pgsize)) { |
| pr_err("verify failed!\n"); |
| errcnt += 1; |
| } else if (!err) |
| pr_info("crosstest ok\n"); |
| kfree(pp1); |
| return err; |
| } |
| |
| static int erasecrosstest(void) |
| { |
| int err = 0, i, ebnum, ebnum2; |
| loff_t addr0; |
| char *readbuf = twopages; |
| |
| pr_info("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; |
| |
| pr_info("erasing block %d\n", ebnum); |
| err = mtdtest_erase_eraseblock(mtd, ebnum); |
| if (err) |
| return err; |
| |
| pr_info("writing 1st page of block %d\n", ebnum); |
| prandom_bytes_state(&rnd_state, writebuf, pgsize); |
| strcpy(writebuf, "There is no data like this!"); |
| err = mtdtest_write(mtd, addr0, pgsize, writebuf); |
| if (err) |
| return err; |
| |
| pr_info("reading 1st page of block %d\n", ebnum); |
| memset(readbuf, 0, pgsize); |
| err = mtdtest_read(mtd, addr0, pgsize, readbuf); |
| if (err) |
| return err; |
| |
| pr_info("verifying 1st page of block %d\n", ebnum); |
| if (memcmp(writebuf, readbuf, pgsize)) { |
| pr_err("verify failed!\n"); |
| errcnt += 1; |
| return -1; |
| } |
| |
| pr_info("erasing block %d\n", ebnum); |
| err = mtdtest_erase_eraseblock(mtd, ebnum); |
| if (err) |
| return err; |
| |
| pr_info("writing 1st page of block %d\n", ebnum); |
| prandom_bytes_state(&rnd_state, writebuf, pgsize); |
| strcpy(writebuf, "There is no data like this!"); |
| err = mtdtest_write(mtd, addr0, pgsize, writebuf); |
| if (err) |
| return err; |
| |
| pr_info("erasing block %d\n", ebnum2); |
| err = mtdtest_erase_eraseblock(mtd, ebnum2); |
| if (err) |
| return err; |
| |
| pr_info("reading 1st page of block %d\n", ebnum); |
| memset(readbuf, 0, pgsize); |
| err = mtdtest_read(mtd, addr0, pgsize, readbuf); |
| if (err) |
| return err; |
| |
| pr_info("verifying 1st page of block %d\n", ebnum); |
| if (memcmp(writebuf, readbuf, pgsize)) { |
| pr_err("verify failed!\n"); |
| errcnt += 1; |
| return -1; |
| } |
| |
| if (!err) |
| pr_info("erasecrosstest ok\n"); |
| return err; |
| } |
| |
| static int erasetest(void) |
| { |
| int err = 0, i, ebnum, ok = 1; |
| loff_t addr0; |
| |
| pr_info("erasetest\n"); |
| |
| ebnum = 0; |
| addr0 = 0; |
| for (i = 0; i < ebcnt && bbt[i]; ++i) { |
| addr0 += mtd->erasesize; |
| ebnum += 1; |
| } |
| |
| pr_info("erasing block %d\n", ebnum); |
| err = mtdtest_erase_eraseblock(mtd, ebnum); |
| if (err) |
| return err; |
| |
| pr_info("writing 1st page of block %d\n", ebnum); |
| prandom_bytes_state(&rnd_state, writebuf, pgsize); |
| err = mtdtest_write(mtd, addr0, pgsize, writebuf); |
| if (err) |
| return err; |
| |
| pr_info("erasing block %d\n", ebnum); |
| err = mtdtest_erase_eraseblock(mtd, ebnum); |
| if (err) |
| return err; |
| |
| pr_info("reading 1st page of block %d\n", ebnum); |
| err = mtdtest_read(mtd, addr0, pgsize, twopages); |
| if (err) |
| return err; |
| |
| pr_info("verifying 1st page of block %d is all 0xff\n", |
| ebnum); |
| for (i = 0; i < pgsize; ++i) |
| if (twopages[i] != 0xff) { |
| pr_err("verifying all 0xff failed at %d\n", |
| i); |
| errcnt += 1; |
| ok = 0; |
| break; |
| } |
| |
| if (ok && !err) |
| pr_info("erasetest ok\n"); |
| |
| return err; |
| } |
| |
| 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) { |
| 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; |
| pgsize = 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, |
| pgsize, ebcnt, pgcnt, mtd->oobsize); |
| |
| err = -ENOMEM; |
| bufsize = pgsize * 2; |
| writebuf = kmalloc(mtd->erasesize, GFP_KERNEL); |
| if (!writebuf) |
| goto out; |
| twopages = kmalloc(bufsize, GFP_KERNEL); |
| if (!twopages) |
| goto out; |
| boundary = kmalloc(bufsize, GFP_KERNEL); |
| if (!boundary) |
| 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; |
| |
| /* Erase all eraseblocks */ |
| pr_info("erasing whole device\n"); |
| err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); |
| if (err) |
| goto out; |
| pr_info("erased %u eraseblocks\n", ebcnt); |
| |
| /* Write all eraseblocks */ |
| prandom_seed_state(&rnd_state, 1); |
| pr_info("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) |
| 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, 1); |
| pr_info("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) |
| pr_info("verified up to eraseblock %u\n", i); |
| |
| err = mtdtest_relax(); |
| if (err) |
| goto out; |
| } |
| pr_info("verified %u eraseblocks\n", i); |
| |
| err = crosstest(); |
| if (err) |
| goto out; |
| |
| if (ebcnt > 1) { |
| err = erasecrosstest(); |
| if (err) |
| goto out; |
| } else { |
| pr_info("skipping erasecrosstest, 2 erase blocks needed\n"); |
| } |
| |
| err = erasetest(); |
| if (err) |
| goto out; |
| |
| pr_info("finished with %d errors\n", errcnt); |
| out: |
| |
| kfree(bbt); |
| kfree(boundary); |
| kfree(twopages); |
| kfree(writebuf); |
| put_mtd_device(mtd); |
| if (err) |
| pr_info("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"); |
