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461 lines
10 KiB
461 lines
10 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2006-2008 Nokia Corporation |
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* |
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* Test page read and write on MTD device. |
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* |
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* Author: Adrian Hunter <[email protected]> |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <asm/div64.h> |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/err.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/slab.h> |
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#include <linux/sched.h> |
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#include <linux/random.h> |
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#include "mtd_test.h" |
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static int dev = -EINVAL; |
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module_param(dev, int, S_IRUGO); |
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MODULE_PARM_DESC(dev, "MTD device number to use"); |
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static struct mtd_info *mtd; |
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static unsigned char *twopages; |
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static unsigned char *writebuf; |
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static unsigned char *boundary; |
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static unsigned char *bbt; |
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static int pgsize; |
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static int bufsize; |
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static int ebcnt; |
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static int pgcnt; |
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static int errcnt; |
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static struct rnd_state rnd_state; |
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static int write_eraseblock(int ebnum) |
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{ |
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loff_t addr = (loff_t)ebnum * mtd->erasesize; |
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prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize); |
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cond_resched(); |
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return mtdtest_write(mtd, addr, mtd->erasesize, writebuf); |
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} |
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static int verify_eraseblock(int ebnum) |
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{ |
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uint32_t j; |
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int err = 0, i; |
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loff_t addr0, addrn; |
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loff_t addr = (loff_t)ebnum * mtd->erasesize; |
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addr0 = 0; |
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for (i = 0; i < ebcnt && bbt[i]; ++i) |
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addr0 += mtd->erasesize; |
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addrn = mtd->size; |
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for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i) |
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addrn -= mtd->erasesize; |
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prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize); |
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for (j = 0; j < pgcnt - 1; ++j, addr += pgsize) { |
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/* Do a read to set the internal dataRAMs to different data */ |
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err = mtdtest_read(mtd, addr0, bufsize, twopages); |
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if (err) |
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return err; |
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err = mtdtest_read(mtd, addrn - bufsize, bufsize, twopages); |
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if (err) |
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return err; |
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memset(twopages, 0, bufsize); |
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err = mtdtest_read(mtd, addr, bufsize, twopages); |
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if (err) |
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break; |
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if (memcmp(twopages, writebuf + (j * pgsize), bufsize)) { |
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pr_err("error: verify failed at %#llx\n", |
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(long long)addr); |
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errcnt += 1; |
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} |
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} |
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/* Check boundary between eraseblocks */ |
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if (addr <= addrn - pgsize - pgsize && !bbt[ebnum + 1]) { |
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struct rnd_state old_state = rnd_state; |
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/* Do a read to set the internal dataRAMs to different data */ |
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err = mtdtest_read(mtd, addr0, bufsize, twopages); |
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if (err) |
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return err; |
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err = mtdtest_read(mtd, addrn - bufsize, bufsize, twopages); |
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if (err) |
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return err; |
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memset(twopages, 0, bufsize); |
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err = mtdtest_read(mtd, addr, bufsize, twopages); |
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if (err) |
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return err; |
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memcpy(boundary, writebuf + mtd->erasesize - pgsize, pgsize); |
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prandom_bytes_state(&rnd_state, boundary + pgsize, pgsize); |
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if (memcmp(twopages, boundary, bufsize)) { |
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pr_err("error: verify failed at %#llx\n", |
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(long long)addr); |
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errcnt += 1; |
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} |
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rnd_state = old_state; |
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} |
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return err; |
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} |
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static int crosstest(void) |
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{ |
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int err = 0, i; |
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loff_t addr, addr0, addrn; |
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unsigned char *pp1, *pp2, *pp3, *pp4; |
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pr_info("crosstest\n"); |
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pp1 = kcalloc(pgsize, 4, GFP_KERNEL); |
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if (!pp1) |
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return -ENOMEM; |
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pp2 = pp1 + pgsize; |
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pp3 = pp2 + pgsize; |
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pp4 = pp3 + pgsize; |
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addr0 = 0; |
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for (i = 0; i < ebcnt && bbt[i]; ++i) |
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addr0 += mtd->erasesize; |
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addrn = mtd->size; |
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for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i) |
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addrn -= mtd->erasesize; |
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/* Read 2nd-to-last page to pp1 */ |
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addr = addrn - pgsize - pgsize; |
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err = mtdtest_read(mtd, addr, pgsize, pp1); |
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if (err) { |
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kfree(pp1); |
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return err; |
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} |
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/* Read 3rd-to-last page to pp1 */ |
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addr = addrn - pgsize - pgsize - pgsize; |
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err = mtdtest_read(mtd, addr, pgsize, pp1); |
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if (err) { |
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kfree(pp1); |
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return err; |
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} |
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/* Read first page to pp2 */ |
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addr = addr0; |
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pr_info("reading page at %#llx\n", (long long)addr); |
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err = mtdtest_read(mtd, addr, pgsize, pp2); |
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if (err) { |
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kfree(pp1); |
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return err; |
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} |
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/* Read last page to pp3 */ |
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addr = addrn - pgsize; |
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pr_info("reading page at %#llx\n", (long long)addr); |
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err = mtdtest_read(mtd, addr, pgsize, pp3); |
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if (err) { |
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kfree(pp1); |
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return err; |
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} |
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/* Read first page again to pp4 */ |
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addr = addr0; |
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pr_info("reading page at %#llx\n", (long long)addr); |
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err = mtdtest_read(mtd, addr, pgsize, pp4); |
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if (err) { |
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kfree(pp1); |
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return err; |
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} |
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/* pp2 and pp4 should be the same */ |
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pr_info("verifying pages read at %#llx match\n", |
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(long long)addr0); |
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if (memcmp(pp2, pp4, pgsize)) { |
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pr_err("verify failed!\n"); |
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errcnt += 1; |
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} else if (!err) |
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pr_info("crosstest ok\n"); |
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kfree(pp1); |
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return err; |
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} |
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static int erasecrosstest(void) |
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{ |
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int err = 0, i, ebnum, ebnum2; |
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loff_t addr0; |
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char *readbuf = twopages; |
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pr_info("erasecrosstest\n"); |
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ebnum = 0; |
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addr0 = 0; |
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for (i = 0; i < ebcnt && bbt[i]; ++i) { |
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addr0 += mtd->erasesize; |
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ebnum += 1; |
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} |
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ebnum2 = ebcnt - 1; |
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while (ebnum2 && bbt[ebnum2]) |
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ebnum2 -= 1; |
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pr_info("erasing block %d\n", ebnum); |
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err = mtdtest_erase_eraseblock(mtd, ebnum); |
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if (err) |
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return err; |
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pr_info("writing 1st page of block %d\n", ebnum); |
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prandom_bytes_state(&rnd_state, writebuf, pgsize); |
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strcpy(writebuf, "There is no data like this!"); |
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err = mtdtest_write(mtd, addr0, pgsize, writebuf); |
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if (err) |
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return err; |
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pr_info("reading 1st page of block %d\n", ebnum); |
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memset(readbuf, 0, pgsize); |
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err = mtdtest_read(mtd, addr0, pgsize, readbuf); |
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if (err) |
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return err; |
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pr_info("verifying 1st page of block %d\n", ebnum); |
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if (memcmp(writebuf, readbuf, pgsize)) { |
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pr_err("verify failed!\n"); |
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errcnt += 1; |
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return -1; |
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} |
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pr_info("erasing block %d\n", ebnum); |
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err = mtdtest_erase_eraseblock(mtd, ebnum); |
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if (err) |
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return err; |
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pr_info("writing 1st page of block %d\n", ebnum); |
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prandom_bytes_state(&rnd_state, writebuf, pgsize); |
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strcpy(writebuf, "There is no data like this!"); |
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err = mtdtest_write(mtd, addr0, pgsize, writebuf); |
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if (err) |
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return err; |
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pr_info("erasing block %d\n", ebnum2); |
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err = mtdtest_erase_eraseblock(mtd, ebnum2); |
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if (err) |
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return err; |
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pr_info("reading 1st page of block %d\n", ebnum); |
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memset(readbuf, 0, pgsize); |
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err = mtdtest_read(mtd, addr0, pgsize, readbuf); |
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if (err) |
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return err; |
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pr_info("verifying 1st page of block %d\n", ebnum); |
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if (memcmp(writebuf, readbuf, pgsize)) { |
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pr_err("verify failed!\n"); |
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errcnt += 1; |
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return -1; |
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} |
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if (!err) |
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pr_info("erasecrosstest ok\n"); |
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return err; |
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} |
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static int erasetest(void) |
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{ |
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int err = 0, i, ebnum, ok = 1; |
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loff_t addr0; |
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pr_info("erasetest\n"); |
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ebnum = 0; |
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addr0 = 0; |
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for (i = 0; i < ebcnt && bbt[i]; ++i) { |
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addr0 += mtd->erasesize; |
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ebnum += 1; |
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} |
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pr_info("erasing block %d\n", ebnum); |
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err = mtdtest_erase_eraseblock(mtd, ebnum); |
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if (err) |
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return err; |
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pr_info("writing 1st page of block %d\n", ebnum); |
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prandom_bytes_state(&rnd_state, writebuf, pgsize); |
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err = mtdtest_write(mtd, addr0, pgsize, writebuf); |
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if (err) |
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return err; |
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pr_info("erasing block %d\n", ebnum); |
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err = mtdtest_erase_eraseblock(mtd, ebnum); |
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if (err) |
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return err; |
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pr_info("reading 1st page of block %d\n", ebnum); |
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err = mtdtest_read(mtd, addr0, pgsize, twopages); |
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if (err) |
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return err; |
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pr_info("verifying 1st page of block %d is all 0xff\n", |
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ebnum); |
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for (i = 0; i < pgsize; ++i) |
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if (twopages[i] != 0xff) { |
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pr_err("verifying all 0xff failed at %d\n", |
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i); |
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errcnt += 1; |
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ok = 0; |
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break; |
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} |
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if (ok && !err) |
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pr_info("erasetest ok\n"); |
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return err; |
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} |
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static int __init mtd_pagetest_init(void) |
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{ |
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int err = 0; |
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uint64_t tmp; |
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uint32_t i; |
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printk(KERN_INFO "\n"); |
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printk(KERN_INFO "=================================================\n"); |
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if (dev < 0) { |
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pr_info("Please specify a valid mtd-device via module parameter\n"); |
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pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n"); |
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return -EINVAL; |
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} |
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pr_info("MTD device: %d\n", dev); |
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mtd = get_mtd_device(NULL, dev); |
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if (IS_ERR(mtd)) { |
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err = PTR_ERR(mtd); |
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pr_err("error: cannot get MTD device\n"); |
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return err; |
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} |
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if (!mtd_type_is_nand(mtd)) { |
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pr_info("this test requires NAND flash\n"); |
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goto out; |
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} |
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tmp = mtd->size; |
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do_div(tmp, mtd->erasesize); |
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ebcnt = tmp; |
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pgcnt = mtd->erasesize / mtd->writesize; |
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pgsize = mtd->writesize; |
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pr_info("MTD device size %llu, eraseblock size %u, " |
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"page size %u, count of eraseblocks %u, pages per " |
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"eraseblock %u, OOB size %u\n", |
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(unsigned long long)mtd->size, mtd->erasesize, |
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pgsize, ebcnt, pgcnt, mtd->oobsize); |
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err = -ENOMEM; |
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bufsize = pgsize * 2; |
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writebuf = kmalloc(mtd->erasesize, GFP_KERNEL); |
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if (!writebuf) |
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goto out; |
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twopages = kmalloc(bufsize, GFP_KERNEL); |
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if (!twopages) |
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goto out; |
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boundary = kmalloc(bufsize, GFP_KERNEL); |
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if (!boundary) |
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goto out; |
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bbt = kzalloc(ebcnt, GFP_KERNEL); |
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if (!bbt) |
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goto out; |
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err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt); |
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if (err) |
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goto out; |
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/* Erase all eraseblocks */ |
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pr_info("erasing whole device\n"); |
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err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); |
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if (err) |
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goto out; |
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pr_info("erased %u eraseblocks\n", ebcnt); |
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/* Write all eraseblocks */ |
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prandom_seed_state(&rnd_state, 1); |
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pr_info("writing whole device\n"); |
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for (i = 0; i < ebcnt; ++i) { |
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if (bbt[i]) |
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continue; |
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err = write_eraseblock(i); |
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if (err) |
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goto out; |
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if (i % 256 == 0) |
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pr_info("written up to eraseblock %u\n", i); |
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err = mtdtest_relax(); |
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if (err) |
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goto out; |
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} |
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pr_info("written %u eraseblocks\n", i); |
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/* Check all eraseblocks */ |
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prandom_seed_state(&rnd_state, 1); |
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pr_info("verifying all eraseblocks\n"); |
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for (i = 0; i < ebcnt; ++i) { |
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if (bbt[i]) |
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continue; |
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err = verify_eraseblock(i); |
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if (err) |
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goto out; |
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if (i % 256 == 0) |
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pr_info("verified up to eraseblock %u\n", i); |
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err = mtdtest_relax(); |
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if (err) |
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goto out; |
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} |
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pr_info("verified %u eraseblocks\n", i); |
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err = crosstest(); |
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if (err) |
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goto out; |
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if (ebcnt > 1) { |
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err = erasecrosstest(); |
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if (err) |
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goto out; |
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} else { |
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pr_info("skipping erasecrosstest, 2 erase blocks needed\n"); |
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} |
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err = erasetest(); |
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if (err) |
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goto out; |
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pr_info("finished with %d errors\n", errcnt); |
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out: |
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kfree(bbt); |
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kfree(boundary); |
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kfree(twopages); |
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kfree(writebuf); |
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put_mtd_device(mtd); |
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if (err) |
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pr_info("error %d occurred\n", err); |
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printk(KERN_INFO "=================================================\n"); |
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return err; |
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} |
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module_init(mtd_pagetest_init); |
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static void __exit mtd_pagetest_exit(void) |
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{ |
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return; |
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} |
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module_exit(mtd_pagetest_exit); |
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MODULE_DESCRIPTION("NAND page test"); |
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MODULE_AUTHOR("Adrian Hunter"); |
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MODULE_LICENSE("GPL");
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