diff options
Diffstat (limited to 'drivers/mtd/tests/pagetest.c')
| -rw-r--r-- | drivers/mtd/tests/pagetest.c | 461 |
1 files changed, 461 insertions, 0 deletions
diff --git a/drivers/mtd/tests/pagetest.c b/drivers/mtd/tests/pagetest.c new file mode 100644 index 0000000000..8eb40b6e6d --- /dev/null +++ b/drivers/mtd/tests/pagetest.c @@ -0,0 +1,461 @@ +// 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"); |