diff options
Diffstat (limited to 'include/linux/dma_remapping.h')
| -rw-r--r-- | include/linux/dma_remapping.h | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/include/linux/dma_remapping.h b/include/linux/dma_remapping.h index bff5c65f81dc..952df39c989d 100644 --- a/include/linux/dma_remapping.h +++ b/include/linux/dma_remapping.h @@ -2,15 +2,14 @@ #define _DMA_REMAPPING_H /* - * We need a fixed PAGE_SIZE of 4K irrespective of - * arch PAGE_SIZE for IOMMU page tables. + * VT-d hardware uses 4KiB page size regardless of host page size. */ -#define PAGE_SHIFT_4K (12) -#define PAGE_SIZE_4K (1UL << PAGE_SHIFT_4K) -#define PAGE_MASK_4K (((u64)-1) << PAGE_SHIFT_4K) -#define PAGE_ALIGN_4K(addr) (((addr) + PAGE_SIZE_4K - 1) & PAGE_MASK_4K) +#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 IOVA_PFN(addr) ((addr) >> PAGE_SHIFT_4K) +#define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT) #define DMA_32BIT_PFN IOVA_PFN(DMA_32BIT_MASK) #define DMA_64BIT_PFN IOVA_PFN(DMA_64BIT_MASK) @@ -25,7 +24,7 @@ struct root_entry { u64 val; u64 rsvd1; }; -#define ROOT_ENTRY_NR (PAGE_SIZE_4K/sizeof(struct root_entry)) +#define ROOT_ENTRY_NR (VTD_PAGE_SIZE/sizeof(struct root_entry)) static inline bool root_present(struct root_entry *root) { return (root->val & 1); @@ -36,7 +35,7 @@ static inline void set_root_present(struct root_entry *root) } static inline void set_root_value(struct root_entry *root, unsigned long value) { - root->val |= value & PAGE_MASK_4K; + root->val |= value & VTD_PAGE_MASK; } struct context_entry; @@ -45,7 +44,7 @@ get_context_addr_from_root(struct root_entry *root) { return (struct context_entry *) (root_present(root)?phys_to_virt( - root->val & PAGE_MASK_4K): + root->val & VTD_PAGE_MASK) : NULL); } @@ -67,7 +66,7 @@ struct context_entry { #define context_present(c) ((c).lo & 1) #define context_fault_disable(c) (((c).lo >> 1) & 1) #define context_translation_type(c) (((c).lo >> 2) & 3) -#define context_address_root(c) ((c).lo & PAGE_MASK_4K) +#define context_address_root(c) ((c).lo & VTD_PAGE_MASK) #define context_address_width(c) ((c).hi & 7) #define context_domain_id(c) (((c).hi >> 8) & ((1 << 16) - 1)) @@ -81,7 +80,7 @@ struct context_entry { } while (0) #define CONTEXT_TT_MULTI_LEVEL 0 #define context_set_address_root(c, val) \ - do {(c).lo |= (val) & PAGE_MASK_4K;} while (0) + do {(c).lo |= (val) & VTD_PAGE_MASK; } while (0) #define context_set_address_width(c, val) do {(c).hi |= (val) & 7;} while (0) #define context_set_domain_id(c, val) \ do {(c).hi |= ((val) & ((1 << 16) - 1)) << 8;} while (0) @@ -107,9 +106,9 @@ struct dma_pte { #define dma_set_pte_writable(p) do {(p).val |= DMA_PTE_WRITE;} while (0) #define dma_set_pte_prot(p, prot) \ do {(p).val = ((p).val & ~3) | ((prot) & 3); } while (0) -#define dma_pte_addr(p) ((p).val & PAGE_MASK_4K) +#define dma_pte_addr(p) ((p).val & VTD_PAGE_MASK) #define dma_set_pte_addr(p, addr) do {\ - (p).val |= ((addr) & PAGE_MASK_4K); } while (0) + (p).val |= ((addr) & VTD_PAGE_MASK); } while (0) #define dma_pte_present(p) (((p).val & 3) != 0) struct intel_iommu; |