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lib
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4.4.0-1128-aws
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include
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linux
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Filename :
dma_remapping.h
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#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 /* Extended context entry types */ #define CONTEXT_TT_PT_PASID 4 #define CONTEXT_TT_PT_PASID_DEV_IOTLB 5 #define CONTEXT_TT_MASK (7ULL << 2) #define CONTEXT_DINVE (1ULL << 8) #define CONTEXT_PRS (1ULL << 9) #define CONTEXT_PASIDE (1ULL << 11) struct intel_iommu; struct dmar_domain; struct root_entry; #ifdef CONFIG_INTEL_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; } #define dmar_disabled (1) #define intel_iommu_enabled (0) #endif #endif