SMMU_SIZE_PT
#define SMMU_PAGE_MASK (~(SMMU_SIZE_PT-1))
dma = dma_map_single(smmu->dev, pt, SMMU_SIZE_PT,
dma_unmap_single(smmu->dev, dma, SMMU_SIZE_PT,
dma_unmap_single(smmu->dev, pte_dma, SMMU_SIZE_PT,
pt = iommu_alloc_pages_sz(gfp | __GFP_DMA, SMMU_SIZE_PT);