int main(int argc, char *argv[])
{
const int LENGTH = 1025;
int i;
uint32_t *src;
uint32_t *dst;
if (xdma_init() < 0) {
exit(EXIT_FAILURE);
}
dst = (uint32_t *) xdma_alloc(LENGTH, sizeof(uint32_t));
src = (uint32_t *) xdma_alloc(LENGTH, sizeof(uint32_t));
// fill src with a value
for (i = 0; i < LENGTH; i++) {
src[i] = 'B';
}
src[LENGTH - 1] = '\n';
// fill dst with a value
for (i = 0; i < LENGTH; i++) {
dst[i] = 'A';
}
dst[LENGTH - 1] = '\n';
printf("test: dst buffer before transmit:\n");
for (i = 0; i < 10; i++) {
printf("%d\t", dst[i]);
}
printf("\n");
if (0 < xdma_num_of_devices()) {
xdma_perform_transaction(0, XDMA_WAIT_NONE, src, LENGTH, dst,
LENGTH);
}
printf("test: dst buffer after transmit:\n");
for (i = 0; i < 10; i++) {
printf("%d\t", dst[i]);
}
printf("\n");
xdma_exit();
return 0;
}
int xdma_init(void)
{
int i;
struct xdma_chan_cfg dst_config;
struct xdma_chan_cfg src_config;
/* Open the char device file.
*/
fd = open(FILEPATH, O_RDWR | O_CREAT | O_TRUNC, (mode_t) 0600);
if (fd == -1) {
perror("Error opening file for writing");
return EXIT_FAILURE;
}
/* mmap the file to get access to the DMA memory area.
*/
map = mmap(0, FILESIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (map == MAP_FAILED) {
close(fd);
perror("Error mmapping the file");
return EXIT_FAILURE;
}
xdma_alloc_reset();
num_of_devices = xdma_num_of_devices();
if (num_of_devices <= 0) {
perror("Error no DMA devices found");
return EXIT_FAILURE;
}
for (i = 0; i < MAX_DEVICES; i++) {
xdma_devices[i].tx_chan = (u32) NULL;
xdma_devices[i].tx_cmp = (u32) NULL;
xdma_devices[i].rx_chan = (u32) NULL;
xdma_devices[i].rx_cmp = (u32) NULL;
xdma_devices[i].device_id = i;
if (i < num_of_devices) {
if (ioctl(fd, XDMA_GET_DEV_INFO, &xdma_devices[i]) < 0) {
perror("Error ioctl getting device info");
return EXIT_FAILURE;
}
dst_config.chan = xdma_devices[i].rx_chan;
dst_config.dir = XDMA_DEV_TO_MEM;
dst_config.coalesc = 1;
dst_config.delay = 0;
dst_config.reset = 0;
if (ioctl(fd, XDMA_DEVICE_CONTROL, &dst_config) < 0) {
perror("Error ioctl config dst (rx) chan");
return EXIT_FAILURE;
}
src_config.chan = xdma_devices[i].tx_chan;
src_config.dir = XDMA_MEM_TO_DEV;
src_config.coalesc = 1;
src_config.delay = 0;
src_config.reset = 0;
if (ioctl(fd, XDMA_DEVICE_CONTROL, &src_config) < 0) {
perror("Error ioctl config src (tx) chan");
return EXIT_FAILURE;
}
}
}
return EXIT_SUCCESS;
}
