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1// SPDX-License-Identifier: GPL-2.0
2#define pr_fmt(fmt) "mtd_test: " fmt
3
4#include <linux/module.h>
5#include <linux/sched.h>
6#include <linux/printk.h>
7
8#include "mtd_test.h"
9
10int mtdtest_erase_eraseblock(struct mtd_info *mtd, unsigned int ebnum)
11{
12 int err;
13 struct erase_info ei;
14 loff_t addr = (loff_t)ebnum * mtd->erasesize;
15
16 memset(&ei, 0, sizeof(struct erase_info));
17 ei.addr = addr;
18 ei.len = mtd->erasesize;
19
20 err = mtd_erase(mtd, &ei);
21 if (err) {
22 pr_info("error %d while erasing EB %d\n", err, ebnum);
23 return err;
24 }
25
26 return 0;
27}
28
29static int is_block_bad(struct mtd_info *mtd, unsigned int ebnum)
30{
31 int ret;
32 loff_t addr = (loff_t)ebnum * mtd->erasesize;
33
34 ret = mtd_block_isbad(mtd, addr);
35 if (ret)
36 pr_info("block %d is bad\n", ebnum);
37
38 return ret;
39}
40
41int mtdtest_scan_for_bad_eraseblocks(struct mtd_info *mtd, unsigned char *bbt,
42 unsigned int eb, int ebcnt)
43{
44 int i, bad = 0;
45
46 if (!mtd_can_have_bb(mtd))
47 return 0;
48
49 pr_info("scanning for bad eraseblocks\n");
50 for (i = 0; i < ebcnt; ++i) {
51 bbt[i] = is_block_bad(mtd, eb + i) ? 1 : 0;
52 if (bbt[i])
53 bad += 1;
54 cond_resched();
55 }
56 pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
57
58 return 0;
59}
60
61int mtdtest_erase_good_eraseblocks(struct mtd_info *mtd, unsigned char *bbt,
62 unsigned int eb, int ebcnt)
63{
64 int err;
65 unsigned int i;
66
67 for (i = 0; i < ebcnt; ++i) {
68 if (bbt[i])
69 continue;
70 err = mtdtest_erase_eraseblock(mtd, eb + i);
71 if (err)
72 return err;
73 cond_resched();
74 }
75
76 return 0;
77}
78
79int mtdtest_read(struct mtd_info *mtd, loff_t addr, size_t size, void *buf)
80{
81 size_t read;
82 int err;
83
84 err = mtd_read(mtd, addr, size, &read, buf);
85 /* Ignore corrected ECC errors */
86 if (mtd_is_bitflip(err))
87 err = 0;
88 if (!err && read != size)
89 err = -EIO;
90 if (err)
91 pr_err("error: read failed at %#llx\n", addr);
92
93 return err;
94}
95
96int mtdtest_write(struct mtd_info *mtd, loff_t addr, size_t size,
97 const void *buf)
98{
99 size_t written;
100 int err;
101
102 err = mtd_write(mtd, addr, size, &written, buf);
103 if (!err && written != size)
104 err = -EIO;
105 if (err)
106 pr_err("error: write failed at %#llx\n", addr);
107
108 return err;
109}
1// SPDX-License-Identifier: GPL-2.0
2#define pr_fmt(fmt) "mtd_test: " fmt
3
4#include <linux/module.h>
5#include <linux/sched.h>
6#include <linux/printk.h>
7
8#include "mtd_test.h"
9
10int mtdtest_erase_eraseblock(struct mtd_info *mtd, unsigned int ebnum)
11{
12 int err;
13 struct erase_info ei;
14 loff_t addr = (loff_t)ebnum * mtd->erasesize;
15
16 memset(&ei, 0, sizeof(struct erase_info));
17 ei.addr = addr;
18 ei.len = mtd->erasesize;
19
20 err = mtd_erase(mtd, &ei);
21 if (err) {
22 pr_info("error %d while erasing EB %d\n", err, ebnum);
23 return err;
24 }
25
26 return 0;
27}
28
29static int is_block_bad(struct mtd_info *mtd, unsigned int ebnum)
30{
31 int ret;
32 loff_t addr = (loff_t)ebnum * mtd->erasesize;
33
34 ret = mtd_block_isbad(mtd, addr);
35 if (ret)
36 pr_info("block %d is bad\n", ebnum);
37
38 return ret;
39}
40
41int mtdtest_scan_for_bad_eraseblocks(struct mtd_info *mtd, unsigned char *bbt,
42 unsigned int eb, int ebcnt)
43{
44 int i, bad = 0;
45
46 if (!mtd_can_have_bb(mtd))
47 return 0;
48
49 pr_info("scanning for bad eraseblocks\n");
50 for (i = 0; i < ebcnt; ++i) {
51 bbt[i] = is_block_bad(mtd, eb + i) ? 1 : 0;
52 if (bbt[i])
53 bad += 1;
54 cond_resched();
55 }
56 pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
57
58 return 0;
59}
60
61int mtdtest_erase_good_eraseblocks(struct mtd_info *mtd, unsigned char *bbt,
62 unsigned int eb, int ebcnt)
63{
64 int err;
65 unsigned int i;
66
67 for (i = 0; i < ebcnt; ++i) {
68 if (bbt[i])
69 continue;
70 err = mtdtest_erase_eraseblock(mtd, eb + i);
71 if (err)
72 return err;
73 cond_resched();
74 }
75
76 return 0;
77}
78
79int mtdtest_read(struct mtd_info *mtd, loff_t addr, size_t size, void *buf)
80{
81 size_t read;
82 int err;
83
84 err = mtd_read(mtd, addr, size, &read, buf);
85 /* Ignore corrected ECC errors */
86 if (mtd_is_bitflip(err))
87 err = 0;
88 if (!err && read != size)
89 err = -EIO;
90 if (err)
91 pr_err("error: read failed at %#llx\n", addr);
92
93 return err;
94}
95
96int mtdtest_write(struct mtd_info *mtd, loff_t addr, size_t size,
97 const void *buf)
98{
99 size_t written;
100 int err;
101
102 err = mtd_write(mtd, addr, size, &written, buf);
103 if (!err && written != size)
104 err = -EIO;
105 if (err)
106 pr_err("error: write failed at %#llx\n", addr);
107
108 return err;
109}