/* This performs a one-way transfer over AXI DMA, the direction being specified
* by the user. The user determines if this is blocking or not with `wait. */
int axidma_oneway_transfer(axidma_dev_t dev, int channel, void *buf,
size_t len, bool wait)
{
int rc;
struct axidma_transaction trans;
unsigned long axidma_cmd;
dma_channel_t *dma_chan;
assert(find_channel(dev, channel) != NULL);
// Setup the argument structure to the IOCTL
dma_chan = find_channel(dev, channel);
trans.wait = wait;
trans.channel_id = channel;
trans.buf = buf;
trans.buf_len = len;
axidma_cmd = dir_to_ioctl(dma_chan->dir);
// Perform the given transfer
rc = ioctl(dev->fd, axidma_cmd, &trans);
if (rc < 0) {
perror("Failed to perform the AXI DMA transfer");
return rc;
}
return 0;
}
/* This performs a one-way transfer over AXI DMA, the direction being specified
* by the user. The user determines if this is blocking or not with `wait. */
int axidma_oneway_transfer(axidma_dev_t dev, enum axidma_dir dir, int channel,
void *buf, size_t len, bool wait)
{
int rc;
struct axidma_transaction trans;
unsigned long axidma_cmd;
assert(dir == AXIDMA_READ || dir == AXIDMA_WRITE);
assert(dir != AXIDMA_READ || valid_channel(dev, channel, AXIDMA_READ));
assert(dir != AXIDMA_WRITE || valid_channel(dev, channel, AXIDMA_WRITE));
// Setup the argument structure to the IOCTL
trans.wait = wait;
trans.channel_id = channel;
trans.buf = buf;
trans.buf_len = len;
axidma_cmd = dir_to_ioctl(dir);
// Perform the given transfer
rc = ioctl(dev->fd, axidma_cmd, &trans);
if (rc < 0) {
perror("Failed to perform the AXI DMA transfer");
return rc;
}
return 0;
}
