[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / dma_remapping.h

#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)
#define DMA_PTE_SNP (1 << 11)

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
Commit	Line	Data
	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	struct intel_iommu;
	17	struct dmar_domain;
	18	struct root_entry;
	19
	20	extern void free_dmar_iommu(struct intel_iommu *iommu);
	21
	22	#ifdef CONFIG_DMAR
	23	extern int iommu_calculate_agaw(struct intel_iommu *iommu);
	24	#else
	25	static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
	26	{
	27	return 0;
	28	}
	29	#endif
	30
	31	extern int dmar_disabled;
	32
	33	#endif