Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 DMA_PTE_READ (1)
13#define DMA_PTE_WRITE (2)
14#define DMA_PTE_SNP (1 << 11)
15
16#define CONTEXT_TT_MULTI_LEVEL 0
17#define CONTEXT_TT_DEV_IOTLB 1
18#define CONTEXT_TT_PASS_THROUGH 2
19
20struct intel_iommu;
21struct dmar_domain;
22struct root_entry;
23
24extern void free_dmar_iommu(struct intel_iommu *iommu);
25
26#ifdef CONFIG_DMAR
27extern int iommu_calculate_agaw(struct intel_iommu *iommu);
28extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
29#else
30static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
31{
32 return 0;
33}
34static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu)
35{
36 return 0;
37}
38#endif
39
40extern int dmar_disabled;
41
42#endif