+static void fun_get_pauseparam(struct net_device *netdev,
+			       struct ethtool_pauseparam *pause)
+{
+	const struct funeth_priv *fp = netdev_priv(netdev);
+	u8 active_pause = fp->active_fc;
+
+	pause->rx_pause = active_pause & FUN_PORT_CAP_RX_PAUSE;
+	pause->tx_pause = active_pause & FUN_PORT_CAP_TX_PAUSE;
+	pause->autoneg = !!(fp->advertising & FUN_PORT_CAP_AUTONEG);
+}
+
+static int fun_set_pauseparam(struct net_device *netdev,
+			      struct ethtool_pauseparam *pause)
+{
+	struct funeth_priv *fp = netdev_priv(netdev);
+	u64 new_advert;
+
+	if (fp->port_caps & FUN_PORT_CAP_VPORT)
+		return -EOPNOTSUPP;
+	if (pause->autoneg && !(fp->advertising & FUN_PORT_CAP_AUTONEG))
+		return -EINVAL;
+	if (pause->tx_pause & !(fp->port_caps & FUN_PORT_CAP_TX_PAUSE))
+		return -EINVAL;
+	if (pause->rx_pause & !(fp->port_caps & FUN_PORT_CAP_RX_PAUSE))
+		return -EINVAL;
+

I _think_ this is wrong. pause->autoneg means we are autoneg'ing
pause, not that we are using auto-neg in general. The user can have
autoneg turned on, but force pause by setting pause->autoneg to False.
In that case, the pause->rx_pause and pause->tx_pause are given direct
to the MAC, not auto negotiated.

+static void fun_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
+{
+	wol->supported = 0;
+	wol->wolopts = 0;
+}

Not required. If you don't provide the callback, the core will return
-EOPNOTSUPP.

+static void fun_get_drvinfo(struct net_device *netdev,
+			    struct ethtool_drvinfo *info)
+{
+	const struct funeth_priv *fp = netdev_priv(netdev);
+
+	strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
+	strcpy(info->fw_version, "N/A");

Don't set it, if you have nothing useful to put in it.

      Andrew