mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
8bc1f85c02
In i915 driver, we do not enable either rc6 or semaphores on SNB when dmar is enabled. The new 'intel_iommu_enabled' variable signals when the iommu code is in operation. Cc: Ted Phelps <phelps@gnusto.com> Cc: Peter <pab1612@gmail.com> Cc: Lukas Hejtmanek <xhejtman@fi.muni.cz> Cc: Andrew Lutomirski <luto@mit.edu> CC: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Keith Packard <keithp@keithp.com>
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
#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 VTD_STRIDE_SHIFT (9)
|
|
#define VTD_STRIDE_MASK (((u64)-1) << VTD_STRIDE_SHIFT)
|
|
|
|
#define DMA_PTE_READ (1)
|
|
#define DMA_PTE_WRITE (2)
|
|
#define DMA_PTE_LARGE_PAGE (1 << 7)
|
|
#define DMA_PTE_SNP (1 << 11)
|
|
|
|
#define CONTEXT_TT_MULTI_LEVEL 0
|
|
#define CONTEXT_TT_DEV_IOTLB 1
|
|
#define CONTEXT_TT_PASS_THROUGH 2
|
|
|
|
struct intel_iommu;
|
|
struct dmar_domain;
|
|
struct root_entry;
|
|
|
|
|
|
#ifdef CONFIG_INTEL_IOMMU
|
|
extern void free_dmar_iommu(struct intel_iommu *iommu);
|
|
extern int iommu_calculate_agaw(struct intel_iommu *iommu);
|
|
extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
|
|
extern int dmar_disabled;
|
|
extern int intel_iommu_enabled;
|
|
#else
|
|
static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void free_dmar_iommu(struct intel_iommu *iommu)
|
|
{
|
|
}
|
|
#define dmar_disabled (1)
|
|
#define intel_iommu_enabled (0)
|
|
#endif
|
|
|
|
|
|
#endif
|