M7350/filesystems/mtd-utils/nandtest.c

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2024-09-09 08:57:42 +00:00
#define PROGRAM_NAME "nandtest"
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <getopt.h>
#include <asm/types.h>
#include "mtd/mtd-user.h"
void usage(int status)
{
fprintf(status ? stderr : stdout,
"usage: %s [OPTIONS] <device>\n\n"
" -h, --help Display this help output\n"
" -m, --markbad Mark blocks bad if they appear so\n"
" -s, --seed Supply random seed\n"
" -p, --passes Number of passes\n"
" -r <n>, --reads=<n> Read & check <n> times per pass\n"
" -o, --offset Start offset on flash\n"
" -l, --length Length of flash to test\n"
" -k, --keep Restore existing contents after test\n",
PROGRAM_NAME);
exit(status);
}
struct mtd_info_user meminfo;
struct mtd_ecc_stats oldstats, newstats;
int fd;
int markbad=0;
int seed;
int read_and_compare(loff_t ofs, unsigned char *data, unsigned char *rbuf)
{
ssize_t len;
int i;
len = pread(fd, rbuf, meminfo.erasesize, ofs);
if (len < meminfo.erasesize) {
printf("\n");
if (len)
fprintf(stderr, "Short read (%zd bytes)\n", len);
else
perror("read");
exit(1);
}
if (ioctl(fd, ECCGETSTATS, &newstats)) {
printf("\n");
perror("ECCGETSTATS");
close(fd);
exit(1);
}
if (newstats.corrected > oldstats.corrected) {
printf("\n %d bit(s) ECC corrected at %08x\n",
newstats.corrected - oldstats.corrected,
(unsigned) ofs);
oldstats.corrected = newstats.corrected;
}
if (newstats.failed > oldstats.failed) {
printf("\nECC failed at %08x\n", (unsigned) ofs);
oldstats.failed = newstats.failed;
}
printf("\r%08x: checking...", (unsigned)ofs);
fflush(stdout);
if (memcmp(data, rbuf, meminfo.erasesize)) {
printf("\n");
fprintf(stderr, "compare failed. seed %d\n", seed);
for (i=0; i<meminfo.erasesize; i++) {
if (data[i] != rbuf[i])
printf("Byte 0x%x is %02x should be %02x\n",
i, rbuf[i], data[i]);
}
return 1;
}
return 0;
}
int erase_and_write(loff_t ofs, unsigned char *data, unsigned char *rbuf, int nr_reads)
{
struct erase_info_user er;
ssize_t len;
int i, read_errs = 0;
printf("\r%08x: erasing... ", (unsigned)ofs);
fflush(stdout);
er.start = ofs;
er.length = meminfo.erasesize;
if (ioctl(fd, MEMERASE, &er)) {
perror("MEMERASE");
if (markbad) {
printf("Mark block bad at %08lx\n", (long)ofs);
ioctl(fd, MEMSETBADBLOCK, &ofs);
}
return 1;
}
printf("\r%08x: writing...", (unsigned)ofs);
fflush(stdout);
len = pwrite(fd, data, meminfo.erasesize, ofs);
if (len < 0) {
printf("\n");
perror("write");
if (markbad) {
printf("Mark block bad at %08lx\n", (long)ofs);
ioctl(fd, MEMSETBADBLOCK, &ofs);
}
return 1;
}
if (len < meminfo.erasesize) {
printf("\n");
fprintf(stderr, "Short write (%zd bytes)\n", len);
exit(1);
}
for (i=1; i<=nr_reads; i++) {
printf("\r%08x: reading (%d of %d)...", (unsigned)ofs, i, nr_reads);
fflush(stdout);
if (read_and_compare(ofs, data, rbuf))
read_errs++;
}
if (read_errs) {
fprintf(stderr, "read/check %d of %d failed. seed %d\n", read_errs, nr_reads, seed);
return 1;
}
return 0;
}
/*
* Main program
*/
int main(int argc, char **argv)
{
int i;
unsigned char *wbuf, *rbuf, *kbuf;
int pass;
int nr_passes = 1;
int nr_reads = 4;
int keep_contents = 0;
uint32_t offset = 0;
uint32_t length = -1;
seed = time(NULL);
for (;;) {
static const char short_options[] = "hkl:mo:p:r:s:";
static const struct option long_options[] = {
{ "help", no_argument, 0, 'h' },
{ "markbad", no_argument, 0, 'm' },
{ "seed", required_argument, 0, 's' },
{ "passes", required_argument, 0, 'p' },
{ "offset", required_argument, 0, 'o' },
{ "length", required_argument, 0, 'l' },
{ "reads", required_argument, 0, 'r' },
{ "keep", no_argument, 0, 'k' },
{0, 0, 0, 0},
};
int option_index = 0;
int c = getopt_long(argc, argv, short_options, long_options, &option_index);
if (c == EOF)
break;
switch (c) {
case 'h':
usage(0);
break;
case '?':
usage(1);
break;
case 'm':
markbad = 1;
break;
case 'k':
keep_contents = 1;
break;
case 's':
seed = atol(optarg);
break;
case 'p':
nr_passes = atol(optarg);
break;
case 'r':
nr_reads = atol(optarg);
break;
case 'o':
offset = atol(optarg);
break;
case 'l':
length = strtol(optarg, NULL, 0);
break;
}
}
if (argc - optind != 1)
usage(1);
fd = open(argv[optind], O_RDWR);
if (fd < 0) {
perror("open");
exit(1);
}
if (ioctl(fd, MEMGETINFO, &meminfo)) {
perror("MEMGETINFO");
close(fd);
exit(1);
}
if (length == -1)
length = meminfo.size;
if (offset % meminfo.erasesize) {
fprintf(stderr, "Offset %x not multiple of erase size %x\n",
offset, meminfo.erasesize);
exit(1);
}
if (length % meminfo.erasesize) {
fprintf(stderr, "Length %x not multiple of erase size %x\n",
length, meminfo.erasesize);
exit(1);
}
if (length + offset > meminfo.size) {
fprintf(stderr, "Length %x + offset %x exceeds device size %x\n",
length, offset, meminfo.size);
exit(1);
}
wbuf = malloc(meminfo.erasesize * 3);
if (!wbuf) {
fprintf(stderr, "Could not allocate %d bytes for buffer\n",
meminfo.erasesize * 2);
exit(1);
}
rbuf = wbuf + meminfo.erasesize;
kbuf = rbuf + meminfo.erasesize;
if (ioctl(fd, ECCGETSTATS, &oldstats)) {
perror("ECCGETSTATS");
close(fd);
exit(1);
}
printf("ECC corrections: %d\n", oldstats.corrected);
printf("ECC failures : %d\n", oldstats.failed);
printf("Bad blocks : %d\n", oldstats.badblocks);
printf("BBT blocks : %d\n", oldstats.bbtblocks);
srand(seed);
for (pass = 0; pass < nr_passes; pass++) {
loff_t test_ofs;
for (test_ofs = offset; test_ofs < offset+length; test_ofs += meminfo.erasesize) {
ssize_t len;
seed = rand();
srand(seed);
if (ioctl(fd, MEMGETBADBLOCK, &test_ofs)) {
printf("\rBad block at 0x%08x\n", (unsigned)test_ofs);
continue;
}
for (i=0; i<meminfo.erasesize; i++)
wbuf[i] = rand();
if (keep_contents) {
printf("\r%08x: reading... ", (unsigned)test_ofs);
fflush(stdout);
len = pread(fd, kbuf, meminfo.erasesize, test_ofs);
if (len < meminfo.erasesize) {
printf("\n");
if (len)
fprintf(stderr, "Short read (%zd bytes)\n", len);
else
perror("read");
exit(1);
}
}
if (erase_and_write(test_ofs, wbuf, rbuf, nr_reads))
continue;
if (keep_contents)
erase_and_write(test_ofs, kbuf, rbuf, 1);
}
printf("\nFinished pass %d successfully\n", pass+1);
}
/* Return happy */
return 0;
}