IXGBE_EIMS_FLOW_DIR
IXGBE_WRITE_REG(&sc->hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
*eims_disable |= IXGBE_EIMS_FLOW_DIR;
eims_enable |= IXGBE_EIMS_FLOW_DIR;
mask |= IXGBE_EIMS_FLOW_DIR;