FBNIC_SIG_PCS_INTR_LINK_DOWN
if (intr_mask & FBNIC_SIG_PCS_INTR_LINK_DOWN)
FBNIC_SIG_PCS_INTR_LINK_DOWN | FBNIC_SIG_PCS_INTR_LINK_UP);
~FBNIC_SIG_PCS_INTR_LINK_DOWN & ~FBNIC_SIG_PCS_INTR_LINK_UP);