#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 |