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gerrit-public.fairphone.software / kernel / msm-4.9 / 4ed0d3e6c64cfd9ba4ceb2099b10d1cf8ece4320 / . / include / linux / dma_remapping.h
blob: e0a03aff63d91271a3bc6fa359b407ecdf7a97df [file] [log] [blame]
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]1#ifndef _DMA_REMAPPING_H
2#define _DMA_REMAPPING_H
3
4/*
Fenghua Yu5b6985c2008-10-16 18:02:32 -0700[diff] [blame]5 * VT-d hardware uses 4KiB page size regardless of host page size.
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]6 */
Fenghua Yu5b6985c2008-10-16 18:02:32 -0700[diff] [blame]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)
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]11
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]12#define DMA_PTE_READ (1)
13#define DMA_PTE_WRITE (2)
Sheng Yang9cf066972009-03-18 15:33:07 +0800[diff] [blame]14#define DMA_PTE_SNP (1 << 11)
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]15
Fenghua Yu4ed0d3e2009-04-24 17:30:20 -0700[diff] [blame^]16#define CONTEXT_TT_MULTI_LEVEL 0
17#define CONTEXT_TT_PASS_THROUGH 2
18
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]19struct intel_iommu;
Mark McLoughlin99126f72008-11-20 15:49:47 +0000[diff] [blame]20struct dmar_domain;
21struct root_entry;
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]22
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]23extern void free_dmar_iommu(struct intel_iommu *iommu);
Ingo Molnarc66b9902009-01-04 10:55:02 +0100[diff] [blame]24
25#ifdef CONFIG_DMAR
Weidong Han1b573682008-12-08 15:34:06 +0800[diff] [blame]26extern int iommu_calculate_agaw(struct intel_iommu *iommu);
Fenghua Yu4ed0d3e2009-04-24 17:30:20 -0700[diff] [blame^]27extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
Ingo Molnarc66b9902009-01-04 10:55:02 +0100[diff] [blame]28#else
29static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
30{
31 return 0;
32}
Fenghua Yu4ed0d3e2009-04-24 17:30:20 -0700[diff] [blame^]33static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu)
34{
35 return 0;
36}
Ingo Molnarc66b9902009-01-04 10:55:02 +0100[diff] [blame]37#endif
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]38
Suresh Siddha2ae21012008-07-10 11:16:43 -0700[diff] [blame]39extern int dmar_disabled;
40
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]41#endif