+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ * Polling 'interrupt' - used by things like netconsole to send skbs
+ * without having to re-enable interrupts. It's not called while
+ * the interrupt routine is executing.
+ */
+static void pasemi_mac_netpoll(struct net_device *dev)
+{
+ const struct pasemi_mac *mac = netdev_priv(dev);
+
+ disable_irq(mac->tx->chan.irq);
+ pasemi_mac_tx_intr(mac->tx->chan.irq, mac->tx);
+ enable_irq(mac->tx->chan.irq);
+
+ disable_irq(mac->rx->chan.irq);
+ pasemi_mac_rx_intr(mac->rx->chan.irq, mac->rx);
+ enable_irq(mac->rx->chan.irq);
+}
+#endif
+
+static int pasemi_mac_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct pasemi_mac *mac = netdev_priv(dev);
+ unsigned int reg;
+ unsigned int rcmdsta = 0;
+ int running;
+ int ret = 0;
+
+ if (new_mtu < PE_MIN_MTU || new_mtu > PE_MAX_MTU)
+ return -EINVAL;
+
+ running = netif_running(dev);
+
+ if (running) {
+ /* Need to stop the interface, clean out all already
+ * received buffers, free all unused buffers on the RX
+ * interface ring, then finally re-fill the rx ring with
+ * the new-size buffers and restart.
+ */
+
+ napi_disable(&mac->napi);
+ netif_tx_disable(dev);
+ pasemi_mac_intf_disable(mac);
+
+ rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
+ pasemi_mac_pause_rxint(mac);
+ pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE);
+ pasemi_mac_free_rx_buffers(mac);
+
+ }
+
+ /* Setup checksum channels if large MTU and none already allocated */
+ if (new_mtu > 1500 && !mac->num_cs) {
+ pasemi_mac_setup_csrings(mac);
+ if (!mac->num_cs) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ }
+
+ /* Change maxf, i.e. what size frames are accepted.
+ * Need room for ethernet header and CRC word
+ */
+ reg = read_mac_reg(mac, PAS_MAC_CFG_MACCFG);
+ reg &= ~PAS_MAC_CFG_MACCFG_MAXF_M;
+ reg |= PAS_MAC_CFG_MACCFG_MAXF(new_mtu + ETH_HLEN + 4);
+ write_mac_reg(mac, PAS_MAC_CFG_MACCFG, reg);
+
+ dev->mtu = new_mtu;
+ /* MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
+ mac->bufsz = new_mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128;
+
+out:
+ if (running) {
+ write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
+ rcmdsta | PAS_DMA_RXINT_RCMDSTA_EN);
+
+ rx_ring(mac)->next_to_fill = 0;
+ pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE-1);
+
+ napi_enable(&mac->napi);
+ netif_start_queue(dev);
+ pasemi_mac_intf_enable(mac);
+ }
+
+ return ret;
+}
+
+static const struct net_device_ops pasemi_netdev_ops = {
+ .ndo_open = pasemi_mac_open,
+ .ndo_stop = pasemi_mac_close,
+ .ndo_start_xmit = pasemi_mac_start_tx,
+ .ndo_set_multicast_list = pasemi_mac_set_rx_mode,
+ .ndo_set_mac_address = pasemi_mac_set_mac_addr,
+ .ndo_change_mtu = pasemi_mac_change_mtu,
+ .ndo_validate_addr = eth_validate_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = pasemi_mac_netpoll,
+#endif
+};
+