| #ifndef _DMA_REMAPPING_H |
| #define _DMA_REMAPPING_H |
| |
| /* |
| * VT-d hardware uses 4KiB page size regardless of host page size. |
| */ |
| #define VTD_PAGE_SHIFT (12) |
| #define VTD_PAGE_SIZE (1UL << VTD_PAGE_SHIFT) |
| #define VTD_PAGE_MASK (((u64)-1) << VTD_PAGE_SHIFT) |
| #define VTD_PAGE_ALIGN(addr) (((addr) + VTD_PAGE_SIZE - 1) & VTD_PAGE_MASK) |
| |
| #define VTD_STRIDE_SHIFT (9) |
| #define VTD_STRIDE_MASK (((u64)-1) << VTD_STRIDE_SHIFT) |
| |
| #define DMA_PTE_READ (1) |
| #define DMA_PTE_WRITE (2) |
| #define DMA_PTE_LARGE_PAGE (1 << 7) |
| #define DMA_PTE_SNP (1 << 11) |
| |
| #define CONTEXT_TT_MULTI_LEVEL 0 |
| #define CONTEXT_TT_DEV_IOTLB 1 |
| #define CONTEXT_TT_PASS_THROUGH 2 |
| |
| struct intel_iommu; |
| struct dmar_domain; |
| struct root_entry; |
| |
| extern void free_dmar_iommu(struct intel_iommu *iommu); |
| |
| #ifdef CONFIG_DMAR |
| extern int iommu_calculate_agaw(struct intel_iommu *iommu); |
| extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu); |
| #else |
| static inline int iommu_calculate_agaw(struct intel_iommu *iommu) |
| { |
| return 0; |
| } |
| static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu) |
| { |
| return 0; |
| } |
| #endif |
| |
| extern int dmar_disabled; |
| |
| #endif |