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gerrit-public.fairphone.software / kernel / msm-4.9 / f7f71173ea69d4dabf166533beffa9294090b7ef / . / include / linux / dma_remapping.h
blob: 5619f8522738b44f3318392da050e7ef9f246020 [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
Yu Zhao93a23a72009-05-18 13:51:37 +0800[diff] [blame]17#define CONTEXT_TT_DEV_IOTLB 1
Fenghua Yu4ed0d3e2009-04-24 17:30:20 -0700[diff] [blame]18#define CONTEXT_TT_PASS_THROUGH 2
19
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]20struct intel_iommu;
Mark McLoughlin99126f72008-11-20 15:49:47 +0000[diff] [blame]21struct dmar_domain;
22struct root_entry;
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]23
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]24extern void free_dmar_iommu(struct intel_iommu *iommu);
Ingo Molnarc66b9902009-01-04 10:55:02 +0100[diff] [blame]25
26#ifdef CONFIG_DMAR
Weidong Han1b573682008-12-08 15:34:06 +0800[diff] [blame]27extern int iommu_calculate_agaw(struct intel_iommu *iommu);
Fenghua Yu4ed0d3e2009-04-24 17:30:20 -0700[diff] [blame]28extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
Ingo Molnarc66b9902009-01-04 10:55:02 +0100[diff] [blame]29#else
30static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
31{
32 return 0;
33}
Fenghua Yu4ed0d3e2009-04-24 17:30:20 -0700[diff] [blame]34static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu)
35{
36 return 0;
37}
Ingo Molnarc66b9902009-01-04 10:55:02 +0100[diff] [blame]38#endif
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]39
Suresh Siddha2ae21012008-07-10 11:16:43 -0700[diff] [blame]40extern int dmar_disabled;
41
Suresh Siddhae61d98d2008-07-10 11:16:35 -0700[diff] [blame]42#endif