diff options
Diffstat (limited to 'libdde_linux26/contrib/include/linux/dma_remapping.h')
| -rw-r--r-- | libdde_linux26/contrib/include/linux/dma_remapping.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/libdde_linux26/contrib/include/linux/dma_remapping.h b/libdde_linux26/contrib/include/linux/dma_remapping.h new file mode 100644 index 00000000..af1dab41 --- /dev/null +++ b/libdde_linux26/contrib/include/linux/dma_remapping.h @@ -0,0 +1,32 @@ +#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 DMA_PTE_READ (1) +#define DMA_PTE_WRITE (2) + +struct intel_iommu; +struct dmar_domain; +struct root_entry; + +extern void free_dmar_iommu(struct intel_iommu *iommu); + +#ifdef CONFIG_DMAR +extern int iommu_calculate_agaw(struct intel_iommu *iommu); +#else +static inline int iommu_calculate_agaw(struct intel_iommu *iommu) +{ + return 0; +} +#endif + +extern int dmar_disabled; + +#endif |