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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 VTD_STRIDE_SHIFT (9) | |
13 | #define VTD_STRIDE_MASK (((u64)-1) << VTD_STRIDE_SHIFT) | |
14 | ||
15 | #define DMA_PTE_READ (1) | |
16 | #define DMA_PTE_WRITE (2) | |
17 | #define DMA_PTE_LARGE_PAGE (1 << 7) | |
18 | #define DMA_PTE_SNP (1 << 11) | |
19 | ||
20 | #define CONTEXT_TT_MULTI_LEVEL 0 | |
21 | #define CONTEXT_TT_DEV_IOTLB 1 | |
22 | #define CONTEXT_TT_PASS_THROUGH 2 | |
23 | ||
24 | struct intel_iommu; | |
25 | struct dmar_domain; | |
26 | struct root_entry; | |
27 | ||
28 | extern void free_dmar_iommu(struct intel_iommu *iommu); | |
29 | ||
30 | #ifdef CONFIG_DMAR | |
31 | extern int iommu_calculate_agaw(struct intel_iommu *iommu); | |
32 | extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu); | |
33 | #else | |
34 | static inline int iommu_calculate_agaw(struct intel_iommu *iommu) | |
35 | { | |
36 | return 0; | |
37 | } | |
38 | static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu) | |
39 | { | |
40 | return 0; | |
41 | } | |
42 | #endif | |
43 | ||
44 | extern int dmar_disabled; | |
45 | ||
46 | #endif |