FXP_CSUM_FEATURES
} else if (m->m_pkthdr.csum_flags & FXP_CSUM_FEATURES) {
if_sethwassistbits(ifp, FXP_CSUM_FEATURES, 0);
if_sethwassistbits(ifp, 0, FXP_CSUM_FEATURES);
if_sethwassist(ifp, FXP_CSUM_FEATURES | CSUM_TSO);