DCMD_SIZE_SHIFT
(((uint32_t)dxs->dxs_burst_size) << DCMD_SIZE_SHIFT);
#define DCMD_SIZE_8 (1<<DCMD_SIZE_SHIFT)
#define DCMD_SIZE_16 (2<<DCMD_SIZE_SHIFT)
#define DCMD_SIZE_32 (3<<DCMD_SIZE_SHIFT)