diff options
| -rw-r--r-- | drivers/pci/intel-iommu.c | 90 |
1 files changed, 43 insertions, 47 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index c3ceebb5be84..5ac2aa783f58 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -71,6 +71,49 @@ #define DMA_32BIT_PFN IOVA_PFN(DMA_BIT_MASK(32)) #define DMA_64BIT_PFN IOVA_PFN(DMA_BIT_MASK(64)) +/* page table handling */ +#define LEVEL_STRIDE (9) +#define LEVEL_MASK (((u64)1 << LEVEL_STRIDE) - 1) + +static inline int agaw_to_level(int agaw) +{ + return agaw + 2; +} + +static inline int agaw_to_width(int agaw) +{ + return 30 + agaw * LEVEL_STRIDE; +} + +static inline int width_to_agaw(int width) +{ + return (width - 30) / LEVEL_STRIDE; +} + +static inline unsigned int level_to_offset_bits(int level) +{ + return (level - 1) * LEVEL_STRIDE; +} + +static inline int pfn_level_offset(unsigned long pfn, int level) +{ + return (pfn >> level_to_offset_bits(level)) & LEVEL_MASK; +} + +static inline unsigned long level_mask(int level) +{ + return -1UL << level_to_offset_bits(level); +} + +static inline unsigned long level_size(int level) +{ + return 1UL << level_to_offset_bits(level); +} + +static inline unsigned long align_to_level(unsigned long pfn, int level) +{ + return (pfn + level_size(level) - 1) & level_mask(level); +} /* VT-d pages must always be _smaller_ than MM pages. Otherwise things are never going to work. */ @@ -434,8 +477,6 @@ void free_iova_mem(struct iova *iova) } -static inline int width_to_agaw(int width); - static int __iommu_calculate_agaw(struct intel_iommu *iommu, int max_gaw) { unsigned long sagaw; @@ -646,51 +687,6 @@ out: spin_unlock_irqrestore(&iommu->lock, flags); } -/* page table handling */ -#define LEVEL_STRIDE (9) -#define LEVEL_MASK (((u64)1 << LEVEL_STRIDE) - 1) - -static inline int agaw_to_level(int agaw) -{ - return agaw + 2; -} - -static inline int agaw_to_width(int agaw) -{ - return 30 + agaw * LEVEL_STRIDE; - -} - -static inline int width_to_agaw(int width) -{ - return (width - 30) / LEVEL_STRIDE; -} - -static inline unsigned int level_to_offset_bits(int level) -{ - return (level - 1) * LEVEL_STRIDE; -} - -static inline int pfn_level_offset(unsigned long pfn, int level) -{ - return (pfn >> level_to_offset_bits(level)) & LEVEL_MASK; -} - -static inline unsigned long level_mask(int level) -{ - return -1UL << level_to_offset_bits(level); -} - -static inline unsigned long level_size(int level) -{ - return 1UL << level_to_offset_bits(level); -} - -static inline unsigned long align_to_level(unsigned long pfn, int level) -{ - return (pfn + level_size(level) - 1) & level_mask(level); -} - static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, unsigned long pfn) { |