static int altera_tse_free_pkt(struct udevice *dev, uchar *packet,
int length)
{
struct altera_tse_priv *priv = dev_get_priv(dev);
struct alt_sgdma_descriptor *rx_desc = priv->rx_desc;
unsigned long rx_buf = (unsigned long)priv->rx_buf;
alt_sgdma_wait_transfer(priv->sgdma_rx);
invalidate_dcache_range(rx_buf, rx_buf + PKTSIZE_ALIGN);
alt_sgdma_construct_descriptor(
rx_desc,
rx_desc + 1,
NULL, /* read addr */
priv->rx_buf, /* write addr */
0, /* length or EOP */
0, /* gen eop */
0, /* read fixed */
0 /* write fixed or sop */
);
/* setup the sgdma */
alt_sgdma_start_transfer(priv->sgdma_rx, rx_desc);
debug("recv setup\n");
return 0;
}
static int altera_tse_send(struct udevice *dev, void *packet, int length)
{
struct altera_tse_priv *priv = dev_get_priv(dev);
struct alt_sgdma_descriptor *tx_desc = priv->tx_desc;
unsigned long tx_buf = (unsigned long)packet;
flush_dcache_range(tx_buf, tx_buf + length);
alt_sgdma_construct_descriptor(
tx_desc,
tx_desc + 1,
packet, /* read addr */
NULL, /* write addr */
length, /* length or EOP ,will change for each tx */
1, /* gen eop */
0, /* read fixed */
1 /* write fixed or sop */
);
/* send the packet */
alt_sgdma_start_transfer(priv->sgdma_tx, tx_desc);
alt_sgdma_wait_transfer(priv->sgdma_tx);
debug("sent %d bytes\n", tx_desc->actual_bytes_transferred);
return tx_desc->actual_bytes_transferred;
}
static int altera_tse_free_pkt_sgdma(struct udevice *dev, uchar *packet,
int length)
{
struct altera_tse_priv *priv = dev_get_priv(dev);
struct alt_sgdma_descriptor *rx_desc = priv->rx_desc;
alt_sgdma_construct_descriptor(
rx_desc,
rx_desc + 1,
NULL, /* read addr */
priv->rx_buf, /* write addr */
0, /* length or EOP */
0, /* gen eop */
0, /* read fixed */
0 /* write fixed or sop */
);
/* setup the sgdma */
alt_sgdma_start_transfer(priv->sgdma_rx, rx_desc);
debug("recv setup\n");
return 0;
}