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mtd: torturetest: Support random pattern

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insmod /oem/mtd_torturetest.ko dev=5 check=0 cycles_count=10 random_pattern=1

Change-Id: I8919da8241e7d3af6925aa7a377027e0c3d7d7f8
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
This commit is contained in:
Jon Lin
2021-11-04 11:08:49 +08:00
parent d3a274cb5e
commit be2891ed31
1 changed files with 24 additions and 1 deletions
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25
drivers/mtd/tests/torturetest.c
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@@ -19,6 +19,7 @@
#include <linux/moduleparam.h> #include <linux/moduleparam.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/mtd/mtd.h> #include <linux/mtd/mtd.h>
#include <linux/random.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/sched.h> #include <linux/sched.h>
#include "mtd_test.h" #include "mtd_test.h"
@@ -54,8 +55,14 @@ module_param(cycles_count, uint, S_IRUGO);
MODULE_PARM_DESC(cycles_count, "how many erase cycles to do " MODULE_PARM_DESC(cycles_count, "how many erase cycles to do "
"(infinite by default)"); "(infinite by default)");
static int random_pattern;
module_param(random_pattern, int, S_IRUGO);
MODULE_PARM_DESC(random_pattern, "if choose random pattern to program");
static struct mtd_info *mtd; static struct mtd_info *mtd;
/* This buffer contains random pattern */
static unsigned char *patt_random;
/* This buffer contains 0x555555...0xAAAAAA... pattern */ /* This buffer contains 0x555555...0xAAAAAA... pattern */
static unsigned char *patt_5A5; static unsigned char *patt_5A5;
/* This buffer contains 0xAAAAAA...0x555555... pattern */ /* This buffer contains 0xAAAAAA...0x555555... pattern */
@@ -210,9 +217,13 @@ static int __init tort_init(void)
} }
err = -ENOMEM; err = -ENOMEM;
patt_random = kmalloc(mtd->erasesize, GFP_KERNEL);
if (!patt_random)
goto out_mtd;
patt_5A5 = kmalloc(mtd->erasesize, GFP_KERNEL); patt_5A5 = kmalloc(mtd->erasesize, GFP_KERNEL);
if (!patt_5A5) if (!patt_5A5)
goto out_mtd; goto out_patt_random;
patt_A5A = kmalloc(mtd->erasesize, GFP_KERNEL); patt_A5A = kmalloc(mtd->erasesize, GFP_KERNEL);
if (!patt_A5A) if (!patt_A5A)
@@ -244,6 +255,8 @@ static int __init tort_init(void)
} }
} }
prandom_bytes(patt_random, mtd->erasesize);
err = mtdtest_scan_for_bad_eraseblocks(mtd, bad_ebs, eb, ebcnt); err = mtdtest_scan_for_bad_eraseblocks(mtd, bad_ebs, eb, ebcnt);
if (err) if (err)
goto out; goto out;
@@ -283,6 +296,8 @@ static int __init tort_init(void)
patt = patt_5A5; patt = patt_5A5;
else else
patt = patt_A5A; patt = patt_A5A;
if (random_pattern)
patt = patt_random;
err = write_pattern(i, patt); err = write_pattern(i, patt);
if (err) if (err)
goto out; goto out;
@@ -301,8 +316,14 @@ static int __init tort_init(void)
patt = patt_5A5; patt = patt_5A5;
else else
patt = patt_A5A; patt = patt_A5A;
if (random_pattern)
patt = patt_random;
err = check_eraseblock(i, patt); err = check_eraseblock(i, patt);
if (err) { if (err) {
if (random_pattern) {
pr_info("verify failed for random pattern\n");
goto out;
}
pr_info("verify failed for %s" pr_info("verify failed for %s"
" pattern\n", " pattern\n",
((eb + erase_cycles) & 1) ? ((eb + erase_cycles) & 1) ?
@@ -345,6 +366,8 @@ out_patt_A5A:
kfree(patt_A5A); kfree(patt_A5A);
out_patt_5A5: out_patt_5A5:
kfree(patt_5A5); kfree(patt_5A5);
out_patt_random:
kfree(patt_random);
out_mtd: out_mtd:
put_mtd_device(mtd); put_mtd_device(mtd);
if (err) if (err)