+
+ /* Update maximum frame size */
+ E1000_WRITE_REG(hw, E1000_RLPML,
+ dev->data->dev_conf.rxmode.max_rx_pkt_len + VLAN_TAG_SIZE);
+}
+
+static void
+igb_vlan_hw_strip_enable(struct rte_eth_dev *dev)
+{
+ struct e1000_hw *hw =
+ E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+ uint32_t reg;
+
+ /* VLAN Mode Enable */
+ reg = E1000_READ_REG(hw, E1000_CTRL);
+ reg |= E1000_CTRL_VME;
+ E1000_WRITE_REG(hw, E1000_CTRL, reg);
+
+ /* Update maximum frame size */
+ E1000_WRITE_REG(hw, E1000_RLPML,
+ dev->data->dev_conf.rxmode.max_rx_pkt_len);
+
+}
+
+static void
+igb_vlan_hw_extend_disable(struct rte_eth_dev *dev)
+{
+ struct e1000_hw *hw =
+ E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+ uint32_t reg;
+
+ /* CTRL_EXT: Extended VLAN */
+ reg = E1000_READ_REG(hw, E1000_CTRL_EXT);
+ reg &= ~E1000_CTRL_EXT_EXTEND_VLAN;
+ E1000_WRITE_REG(hw, E1000_CTRL_EXT, reg);
+
+}
+
+static void
+igb_vlan_hw_extend_enable(struct rte_eth_dev *dev)
+{
+ struct e1000_hw *hw =
+ E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+ uint32_t reg;
+
+ /* CTRL_EXT: Extended VLAN */
+ reg = E1000_READ_REG(hw, E1000_CTRL_EXT);
+ reg |= E1000_CTRL_EXT_EXTEND_VLAN;
+ E1000_WRITE_REG(hw, E1000_CTRL_EXT, reg);
+}
+
+static void
+eth_igb_vlan_offload_set(struct rte_eth_dev *dev, int mask)
+{
+ if(mask & ETH_VLAN_STRIP_MASK){
+ if (dev->data->dev_conf.rxmode.hw_vlan_strip)
+ igb_vlan_hw_strip_enable(dev);
+ else
+ igb_vlan_hw_strip_disable(dev);
+ }
+
+ if(mask & ETH_VLAN_FILTER_MASK){
+ if (dev->data->dev_conf.rxmode.hw_vlan_filter)
+ igb_vlan_hw_filter_enable(dev);
+ else
+ igb_vlan_hw_filter_disable(dev);
+ }
+
+ if(mask & ETH_VLAN_EXTEND_MASK){
+ if (dev->data->dev_conf.rxmode.hw_vlan_extend)
+ igb_vlan_hw_extend_enable(dev);
+ else
+ igb_vlan_hw_extend_disable(dev);
+ }