FBNIC_BD_DESC_ID_MASK
(FBNIC_BD_DESC_ID_MASK & \
~(FBNIC_BD_DESC_ID_MASK * FBNIC_BD_FRAG_COUNT))
(FBNIC_BD_DESC_ID_MASK & ~FBNIC_BD_FRAG_ID_MASK)
FIELD_GET(FBNIC_BD_DESC_ID_MASK, bd),
FIELD_PREP(FBNIC_BD_DESC_ID_MASK, 1);