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udmabuf_test.c
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#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <time.h>
#include <sys/types.h>
#include <sys/mman.h>
void print_diff_time(struct timeval start_time, struct timeval end_time)
{
struct timeval diff_time;
if (end_time.tv_usec < start_time.tv_usec) {
diff_time.tv_sec = end_time.tv_sec - start_time.tv_sec - 1;
diff_time.tv_usec = end_time.tv_usec - start_time.tv_usec + 1000*1000;
} else {
diff_time.tv_sec = end_time.tv_sec - start_time.tv_sec ;
diff_time.tv_usec = end_time.tv_usec - start_time.tv_usec;
}
printf("time = %ld.%06ld sec\n", diff_time.tv_sec, diff_time.tv_usec);
}
int check_buf(unsigned char* buf, unsigned int size)
{
int m = 256;
int n = 10;
int i, k;
int error_count = 0;
while(--n > 0) {
for(i = 0; i < size; i = i + m) {
m = (i+256 < size) ? 256 : (size-i);
for(k = 0; k < m; k++) {
buf[i+k] = (k & 0xFF);
}
for(k = 0; k < m; k++) {
if (buf[i+k] != (k & 0xFF)) {
error_count++;
}
}
}
}
return error_count;
}
int clear_buf(unsigned char* buf, unsigned int size)
{
int n = 100;
int error_count = 0;
while(--n > 0) {
memset((void*)buf, 0, size);
}
return error_count;
}
void check_buf_test(unsigned int size, unsigned int sync_mode, int o_sync)
{
int fd;
unsigned char attr[1024];
struct timeval start_time, end_time;
int error_count;
unsigned char* buf;
if ((fd = open("/sys/class/udmabuf/udmabuf0/sync_mode", O_WRONLY)) != -1) {
sprintf(attr, "%d", sync_mode);
write(fd, attr, strlen(attr));
close(fd);
}
printf("sync_mode=%d, O_SYNC=%d, ", sync_mode, (o_sync)?1:0);
if ((fd = open("/dev/udmabuf0", O_RDWR | o_sync)) != -1) {
buf = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
gettimeofday(&start_time, NULL);
error_count = check_buf(buf, size);
gettimeofday(&end_time , NULL);
print_diff_time(start_time, end_time);
close(fd);
}
}
void clear_buf_test(unsigned int size, unsigned int sync_mode, int o_sync)
{
int fd;
unsigned char attr[1024];
struct timeval start_time, end_time;
int error_count;
unsigned char* buf;
if ((fd = open("/sys/class/udmabuf/udmabuf0/sync_mode", O_WRONLY)) != -1) {
sprintf(attr, "%d", sync_mode);
write(fd, attr, strlen(attr));
close(fd);
}
printf("sync_mode=%d, O_SYNC=%d, ", sync_mode, (o_sync)?1:0);
if ((fd = open("/dev/udmabuf0", O_RDWR | o_sync)) != -1) {
buf = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
gettimeofday(&start_time, NULL);
error_count = clear_buf(buf, size);
gettimeofday(&end_time , NULL);
print_diff_time(start_time, end_time);
close(fd);
}
}
void main()
{
int fd;
unsigned char attr[1024];
unsigned char* buf;
unsigned int buf_size;
unsigned long phys_addr;
unsigned long debug_vma = 0;
unsigned long sync_mode = 2;
int error_count;
struct timeval start_time, end_time;
if ((fd = open("/sys/class/udmabuf/udmabuf0/phys_addr", O_RDONLY)) != -1) {
read(fd, attr, 1024);
sscanf(attr, "%x", &phys_addr);
close(fd);
}
if ((fd = open("/sys/class/udmabuf/udmabuf0/size" , O_RDONLY)) != -1) {
read(fd, attr, 1024);
sscanf(attr, "%d", &buf_size);
close(fd);
}
if ((fd = open("/sys/class/udmabuf/udmabuf0/sync_mode", O_WRONLY)) != -1) {
sprintf(attr, "%d", sync_mode);
write(fd, attr, strlen(attr));
close(fd);
}
if ((fd = open("/sys/class/udmabuf/udmabuf0/debug_vma", O_WRONLY)) != -1) {
sprintf(attr, "%d", debug_vma);
write(fd, attr, strlen(attr));
close(fd);
}
printf("phys_addr=0x%x\n", phys_addr);
printf("size=%d\n", buf_size);
if ((fd = open("/dev/udmabuf0", O_RDWR)) != -1) {
long last_pos = lseek(fd, 0, 2);
if (last_pos == -1) {
printf("lseek error\n");
exit(-1);
}
close(fd);
}
printf("check_buf()\n", buf_size);
check_buf_test(buf_size, 0, 0);
check_buf_test(buf_size, 0, O_SYNC);
check_buf_test(buf_size, 1, 0);
check_buf_test(buf_size, 1, O_SYNC);
check_buf_test(buf_size, 2, 0);
check_buf_test(buf_size, 2, O_SYNC);
check_buf_test(buf_size, 3, 0);
check_buf_test(buf_size, 3, O_SYNC);
check_buf_test(buf_size, 4, 0);
check_buf_test(buf_size, 4, O_SYNC);
check_buf_test(buf_size, 5, 0);
check_buf_test(buf_size, 5, O_SYNC);
check_buf_test(buf_size, 6, 0);
check_buf_test(buf_size, 6, O_SYNC);
check_buf_test(buf_size, 7, 0);
check_buf_test(buf_size, 7, O_SYNC);
printf("clear_buf()\n", buf_size);
clear_buf_test(buf_size, 0, 0);
clear_buf_test(buf_size, 0, O_SYNC);
clear_buf_test(buf_size, 1, 0);
clear_buf_test(buf_size, 1, O_SYNC);
clear_buf_test(buf_size, 2, 0);
clear_buf_test(buf_size, 2, O_SYNC);
clear_buf_test(buf_size, 3, 0);
clear_buf_test(buf_size, 3, O_SYNC);
clear_buf_test(buf_size, 4, 0);
clear_buf_test(buf_size, 4, O_SYNC);
clear_buf_test(buf_size, 5, 0);
clear_buf_test(buf_size, 5, O_SYNC);
clear_buf_test(buf_size, 6, 0);
clear_buf_test(buf_size, 6, O_SYNC);
clear_buf_test(buf_size, 7, 0);
clear_buf_test(buf_size, 7, O_SYNC);
}