| #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; | |
| #ifdef CONFIG_INTEL_IOMMU | |
| extern void free_dmar_iommu(struct intel_iommu *iommu); | |
| extern int iommu_calculate_agaw(struct intel_iommu *iommu); | |
| extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu); | |
| extern int dmar_disabled; | |
| extern int intel_iommu_enabled; | |
| #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; | |
| } | |
| static inline void free_dmar_iommu(struct intel_iommu *iommu) | |
| { | |
| } | |
| #define dmar_disabled (1) | |
| #define intel_iommu_enabled (0) | |
| #endif | |
| #endif |