SDMA_DESC1_HEADER_DWS_MASK
(((u64)ahg_hlen & SDMA_DESC1_HEADER_DWS_MASK)
(SDMA_DESC1_HEADER_DWS_MASK << SDMA_DESC1_HEADER_DWS_SHIFT)
SDMA_DESC1_HEADER_DWS_MASK));