#include <linux/dma-mapping.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
+#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#define RX_QUEUE_ENTRIES 128 /* must be power of 2 */
#define TX_QUEUE_ENTRIES 16 /* must be power of 2 */
-#define MAX_PKT_SIZE 1518
#define RX_BUF_SIZE 2044 /* must be smaller than 0x7ff */
+#define MAX_PKT_SIZE RX_BUF_SIZE /* multi-segment not supported */
#if MAX_PKT_SIZE > 0x7ff
#error invalid MAX_PKT_SIZE
static int ftmac100_start_hw(struct ftmac100 *priv)
{
struct net_device *netdev = priv->netdev;
+ unsigned int maccr = MACCR_ENABLE_ALL;
if (ftmac100_reset(priv))
return -EIO;
ftmac100_set_mac(priv, netdev->dev_addr);
- iowrite32(MACCR_ENABLE_ALL, priv->base + FTMAC100_OFFSET_MACCR);
+ /* See ftmac100_change_mtu() */
+ if (netdev->mtu > ETH_DATA_LEN)
+ maccr |= FTMAC100_MACCR_RX_FTL;
+
+ iowrite32(maccr, priv->base + FTMAC100_OFFSET_MACCR);
return 0;
}
return generic_mii_ioctl(&priv->mii, data, cmd, NULL);
}
+static int ftmac100_change_mtu(struct net_device *netdev, int mtu)
+{
+ struct ftmac100 *priv = netdev_priv(netdev);
+ unsigned int maccr;
+
+ maccr = ioread32(priv->base + FTMAC100_OFFSET_MACCR);
+ if (mtu > ETH_DATA_LEN) {
+ /* process long packets in the driver */
+ maccr |= FTMAC100_MACCR_RX_FTL;
+ } else {
+ /* Let the controller drop incoming packets greater
+ * than 1518 (that is 1500 + 14 Ethernet + 4 FCS).
+ */
+ maccr &= ~FTMAC100_MACCR_RX_FTL;
+ }
+ iowrite32(maccr, priv->base + FTMAC100_OFFSET_MACCR);
+
+ netdev->mtu = mtu;
+
+ return 0;
+}
+
static const struct net_device_ops ftmac100_netdev_ops = {
.ndo_open = ftmac100_open,
.ndo_stop = ftmac100_stop,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
.ndo_eth_ioctl = ftmac100_do_ioctl,
+ .ndo_change_mtu = ftmac100_change_mtu,
};
/******************************************************************************