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215 lines
4.4 KiB
215 lines
4.4 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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* Check MTD device read. |
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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 <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 "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 *iobuf; |
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static unsigned char *iobuf1; |
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static unsigned char *bbt; |
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static int pgsize; |
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static int ebcnt; |
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static int pgcnt; |
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static int read_eraseblock_by_page(int ebnum) |
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{ |
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int i, ret, err = 0; |
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loff_t addr = (loff_t)ebnum * mtd->erasesize; |
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void *buf = iobuf; |
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void *oobbuf = iobuf1; |
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for (i = 0; i < pgcnt; i++) { |
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memset(buf, 0 , pgsize); |
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ret = mtdtest_read(mtd, addr, pgsize, buf); |
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if (ret) { |
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if (!err) |
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err = ret; |
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} |
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if (mtd->oobsize) { |
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struct mtd_oob_ops ops = { }; |
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ops.mode = MTD_OPS_PLACE_OOB; |
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ops.len = 0; |
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ops.retlen = 0; |
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ops.ooblen = mtd->oobsize; |
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ops.oobretlen = 0; |
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ops.ooboffs = 0; |
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ops.datbuf = NULL; |
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ops.oobbuf = oobbuf; |
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ret = mtd_read_oob(mtd, addr, &ops); |
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if ((ret && !mtd_is_bitflip(ret)) || |
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ops.oobretlen != mtd->oobsize) { |
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pr_err("error: read oob failed at " |
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"%#llx\n", (long long)addr); |
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if (!err) |
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err = ret; |
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if (!err) |
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err = -EINVAL; |
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} |
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oobbuf += mtd->oobsize; |
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} |
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addr += pgsize; |
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buf += pgsize; |
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} |
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return err; |
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} |
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static void dump_eraseblock(int ebnum) |
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{ |
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int i, j, n; |
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char line[128]; |
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int pg, oob; |
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pr_info("dumping eraseblock %d\n", ebnum); |
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n = mtd->erasesize; |
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for (i = 0; i < n;) { |
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char *p = line; |
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p += sprintf(p, "%05x: ", i); |
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for (j = 0; j < 32 && i < n; j++, i++) |
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p += sprintf(p, "%02x", (unsigned int)iobuf[i]); |
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printk(KERN_CRIT "%s\n", line); |
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cond_resched(); |
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} |
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if (!mtd->oobsize) |
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return; |
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pr_info("dumping oob from eraseblock %d\n", ebnum); |
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n = mtd->oobsize; |
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for (pg = 0, i = 0; pg < pgcnt; pg++) |
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for (oob = 0; oob < n;) { |
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char *p = line; |
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p += sprintf(p, "%05x: ", i); |
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for (j = 0; j < 32 && oob < n; j++, oob++, i++) |
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p += sprintf(p, "%02x", |
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(unsigned int)iobuf1[i]); |
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printk(KERN_CRIT "%s\n", line); |
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cond_resched(); |
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} |
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} |
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static int __init mtd_readtest_init(void) |
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{ |
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uint64_t tmp; |
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int err, 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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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->writesize == 1) { |
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pr_info("not NAND flash, assume page size is 512 " |
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"bytes.\n"); |
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pgsize = 512; |
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} else |
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pgsize = mtd->writesize; |
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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 / pgsize; |
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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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iobuf = kmalloc(mtd->erasesize, GFP_KERNEL); |
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if (!iobuf) |
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goto out; |
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iobuf1 = kmalloc(mtd->erasesize, GFP_KERNEL); |
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if (!iobuf1) |
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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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/* Read all eraseblocks 1 page at a time */ |
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pr_info("testing page read\n"); |
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for (i = 0; i < ebcnt; ++i) { |
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int ret; |
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if (bbt[i]) |
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continue; |
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ret = read_eraseblock_by_page(i); |
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if (ret) { |
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dump_eraseblock(i); |
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if (!err) |
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err = ret; |
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} |
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ret = mtdtest_relax(); |
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if (ret) { |
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err = ret; |
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goto out; |
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} |
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} |
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if (err) |
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pr_info("finished with errors\n"); |
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else |
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pr_info("finished\n"); |
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out: |
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kfree(iobuf); |
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kfree(iobuf1); |
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kfree(bbt); |
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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_readtest_init); |
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static void __exit mtd_readtest_exit(void) |
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{ |
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return; |
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} |
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module_exit(mtd_readtest_exit); |
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MODULE_DESCRIPTION("Read test module"); |
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MODULE_AUTHOR("Adrian Hunter"); |
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MODULE_LICENSE("GPL");
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