jsm: Fixed EEH recovery error
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / linux / dma_remapping.h
blob57c9a8ae4f2df2127dffe7e88aee95b5f2cdce1a
1 #ifndef _DMA_REMAPPING_H
2 #define _DMA_REMAPPING_H
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)
12 #define VTD_STRIDE_SHIFT (9)
13 #define VTD_STRIDE_MASK (((u64)-1) << VTD_STRIDE_SHIFT)
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)
20 #define CONTEXT_TT_MULTI_LEVEL 0
21 #define CONTEXT_TT_DEV_IOTLB 1
22 #define CONTEXT_TT_PASS_THROUGH 2
24 struct intel_iommu;
25 struct dmar_domain;
26 struct root_entry;
29 #ifdef CONFIG_INTEL_IOMMU
30 extern void free_dmar_iommu(struct intel_iommu *iommu);
31 extern int iommu_calculate_agaw(struct intel_iommu *iommu);
32 extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
33 extern int dmar_disabled;
34 extern int intel_iommu_enabled;
35 #else
36 static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
38 return 0;
40 static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu)
42 return 0;
44 static inline void free_dmar_iommu(struct intel_iommu *iommu)
47 #define dmar_disabled (1)
48 #define intel_iommu_enabled (0)
49 #endif
52 #endif