NV_ADMA_CPB_SZ
mem += NV_ADMA_MAX_CPBS * NV_ADMA_CPB_SZ;
mem_dma += NV_ADMA_MAX_CPBS * NV_ADMA_CPB_SZ;
NV_ADMA_SGTBL_LEN = (1024 - NV_ADMA_CPB_SZ) /
(NV_ADMA_CPB_SZ + NV_ADMA_SGTBL_SZ),