FBNIC_TWD_CSUM_OFFSET_MASK
FIELD_GET(FBNIC_TWD_CSUM_OFFSET_MASK, twd),
*meta |= cpu_to_le64(FIELD_PREP(FBNIC_TWD_CSUM_OFFSET_MASK,
!FIELD_FIT(FBNIC_TWD_CSUM_OFFSET_MASK, skb->csum_offset / 2))