1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2006-2008 Nokia Corporation
*
* Check MTD device read.
*
* Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#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 "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 *iobuf;
static unsigned char *iobuf1;
static unsigned char *bbt;
static int pgsize;
static int ebcnt;
static int pgcnt;
static int read_eraseblock_by_page(int ebnum)
{
int i, ret, err = 0;
loff_t addr = (loff_t)ebnum * mtd->erasesize;
void *buf = iobuf;
void *oobbuf = iobuf1;
for (i = 0; i < pgcnt; i++) {
memset(buf, 0 , pgsize);
ret = mtdtest_read(mtd, addr, pgsize, buf);
if (ret) {
if (!err)
err = ret;
}
if (mtd->oobsize) {
struct mtd_oob_ops ops = { };
ops.mode = MTD_OPS_PLACE_OOB;
ops.len = 0;
ops.retlen = 0;
ops.ooblen = mtd->oobsize;
ops.oobretlen = 0;
ops.ooboffs = 0;
ops.datbuf = NULL;
ops.oobbuf = oobbuf;
ret = mtd_read_oob(mtd, addr, &ops);
if ((ret && !mtd_is_bitflip(ret)) ||
ops.oobretlen != mtd->oobsize) {
pr_err("error: read oob failed at "
"%#llx\n", (long long)addr);
if (!err)
err = ret;
if (!err)
err = -EINVAL;
}
oobbuf += mtd->oobsize;
}
addr += pgsize;
buf += pgsize;
}
return err;
}
static void dump_eraseblock(int ebnum)
{
int i, j, n;
char line[128];
int pg, oob;
pr_info("dumping eraseblock %d\n", ebnum);
n = mtd->erasesize;
for (i = 0; i < n;) {
char *p = line;
p += sprintf(p, "%05x: ", i);
for (j = 0; j < 32 && i < n; j++, i++)
p += sprintf(p, "%02x", (unsigned int)iobuf[i]);
printk(KERN_CRIT "%s\n", line);
cond_resched();
}
if (!mtd->oobsize)
return;
pr_info("dumping oob from eraseblock %d\n", ebnum);
n = mtd->oobsize;
for (pg = 0, i = 0; pg < pgcnt; pg++)
for (oob = 0; oob < n;) {
char *p = line;
p += sprintf(p, "%05x: ", i);
for (j = 0; j < 32 && oob < n; j++, oob++, i++)
p += sprintf(p, "%02x",
(unsigned int)iobuf1[i]);
printk(KERN_CRIT "%s\n", line);
cond_resched();
}
}
static int __init mtd_readtest_init(void)
{
uint64_t tmp;
int err, i;
printk(KERN_INFO "\n");
printk(KERN_INFO "=================================================\n");
if (dev < 0) {
pr_info("Please specify a valid mtd-device via module parameter\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->writesize == 1) {
pr_info("not NAND flash, assume page size is 512 "
"bytes.\n");
pgsize = 512;
} else
pgsize = mtd->writesize;
tmp = mtd->size;
do_div(tmp, mtd->erasesize);
ebcnt = tmp;
pgcnt = mtd->erasesize / pgsize;
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;
iobuf = kmalloc(mtd->erasesize, GFP_KERNEL);
if (!iobuf)
goto out;
iobuf1 = kmalloc(mtd->erasesize, GFP_KERNEL);
if (!iobuf1)
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;
/* Read all eraseblocks 1 page at a time */
pr_info("testing page read\n");
for (i = 0; i < ebcnt; ++i) {
int ret;
if (bbt[i])
continue;
ret = read_eraseblock_by_page(i);
if (ret) {
dump_eraseblock(i);
if (!err)
err = ret;
}
ret = mtdtest_relax();
if (ret) {
err = ret;
goto out;
}
}
if (err)
pr_info("finished with errors\n");
else
pr_info("finished\n");
out:
kfree(iobuf);
kfree(iobuf1);
kfree(bbt);
put_mtd_device(mtd);
if (err)
pr_info("error %d occurred\n", err);
printk(KERN_INFO "=================================================\n");
return err;
}
module_init(mtd_readtest_init);
static void __exit mtd_readtest_exit(void)
{
return;
}
module_exit(mtd_readtest_exit);
MODULE_DESCRIPTION("Read test module");
MODULE_AUTHOR("Adrian Hunter");
MODULE_LICENSE("GPL");
|
