1 #ifndef _DMA_REMAPPING_H 2 #define _DMA_REMAPPING_H 3 4 /* 5 * VT-d hardware uses 4KiB page size regardless of host page size. 6 */ 7 #define VTD_PAGE_SHIFT (12) 8 #define VTD_PAGE_SIZE (1UL << VTD_PAGE_SHIFT) 9 #define VTD_PAGE_MASK (((u64)-1) << VTD_PAGE_SHIFT) 10 #define VTD_PAGE_ALIGN(addr) (((addr) + VTD_PAGE_SIZE - 1) & VTD_PAGE_MASK) 11 12 #define DMA_PTE_READ (1) 13 #define DMA_PTE_WRITE (2) 14 15 struct intel_iommu; 16 struct dmar_domain; 17 struct root_entry; 18 19 extern void free_dmar_iommu(struct intel_iommu *iommu); 20 21 #ifdef CONFIG_DMAR 22 extern int iommu_calculate_agaw(struct intel_iommu *iommu); 23 #else iommu_calculate_agaw(struct intel_iommu * iommu)24static inline int iommu_calculate_agaw(struct intel_iommu *iommu) 25 { 26 return 0; 27 } 28 #endif 29 30 extern int dmar_disabled; 31 32 #endif 33