1 #ifndef _DMA_REMAPPING_H
2 #define _DMA_REMAPPING_H
5 * VT-d hardware uses 4KiB page size regardless of host page size.
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)
12 #define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT)
13 #define DMA_32BIT_PFN IOVA_PFN(DMA_32BIT_MASK)
14 #define DMA_64BIT_PFN IOVA_PFN(DMA_64BIT_MASK)
20 * 12-63: Context Ptr (12 - (haw-1))
27 #define ROOT_ENTRY_NR (VTD_PAGE_SIZE/sizeof(struct root_entry))
28 static inline bool root_present(struct root_entry *root)
30 return (root->val & 1);
32 static inline void set_root_present(struct root_entry *root)
36 static inline void set_root_value(struct root_entry *root, unsigned long value)
38 root->val |= value & VTD_PAGE_MASK;
42 static inline struct context_entry *
43 get_context_addr_from_root(struct root_entry *root)
45 return (struct context_entry *)
46 (root_present(root)?phys_to_virt(
47 root->val & VTD_PAGE_MASK) :
54 * 1: fault processing disable
55 * 2-3: translation type
56 * 12-63: address space root
62 struct context_entry {
66 #define context_present(c) ((c).lo & 1)
67 #define context_fault_disable(c) (((c).lo >> 1) & 1)
68 #define context_translation_type(c) (((c).lo >> 2) & 3)
69 #define context_address_root(c) ((c).lo & VTD_PAGE_MASK)
70 #define context_address_width(c) ((c).hi & 7)
71 #define context_domain_id(c) (((c).hi >> 8) & ((1 << 16) - 1))
73 #define context_set_present(c) do {(c).lo |= 1;} while (0)
74 #define context_set_fault_enable(c) \
75 do {(c).lo &= (((u64)-1) << 2) | 1;} while (0)
76 #define context_set_translation_type(c, val) \
78 (c).lo &= (((u64)-1) << 4) | 3; \
79 (c).lo |= ((val) & 3) << 2; \
81 #define CONTEXT_TT_MULTI_LEVEL 0
82 #define context_set_address_root(c, val) \
83 do {(c).lo |= (val) & VTD_PAGE_MASK; } while (0)
84 #define context_set_address_width(c, val) do {(c).hi |= (val) & 7;} while (0)
85 #define context_set_domain_id(c, val) \
86 do {(c).hi |= ((val) & ((1 << 16) - 1)) << 8;} while (0)
87 #define context_clear_entry(c) do {(c).lo = 0; (c).hi = 0;} while (0)
95 * 12-63: Host physcial address
100 #define dma_clear_pte(p) do {(p).val = 0;} while (0)
102 #define DMA_PTE_READ (1)
103 #define DMA_PTE_WRITE (2)
105 #define dma_set_pte_readable(p) do {(p).val |= DMA_PTE_READ;} while (0)
106 #define dma_set_pte_writable(p) do {(p).val |= DMA_PTE_WRITE;} while (0)
107 #define dma_set_pte_prot(p, prot) \
108 do {(p).val = ((p).val & ~3) | ((prot) & 3); } while (0)
109 #define dma_pte_addr(p) ((p).val & VTD_PAGE_MASK)
110 #define dma_set_pte_addr(p, addr) do {\
111 (p).val |= ((addr) & VTD_PAGE_MASK); } while (0)
112 #define dma_pte_present(p) (((p).val & 3) != 0)
117 int id; /* domain id */
118 struct intel_iommu *iommu; /* back pointer to owning iommu */
120 struct list_head devices; /* all devices' list */
121 struct iova_domain iovad; /* iova's that belong to this domain */
123 struct dma_pte *pgd; /* virtual address */
124 spinlock_t mapping_lock; /* page table lock */
125 int gaw; /* max guest address width */
127 /* adjusted guest address width, 0 is level 2 30-bit */
130 #define DOMAIN_FLAG_MULTIPLE_DEVICES 1
134 /* PCI domain-device relationship */
135 struct device_domain_info {
136 struct list_head link; /* link to domain siblings */
137 struct list_head global; /* link to global list */
138 u8 bus; /* PCI bus numer */
139 u8 devfn; /* PCI devfn number */
140 struct pci_dev *dev; /* it's NULL for PCIE-to-PCI bridge */
141 struct dmar_domain *domain; /* pointer to domain */
144 extern int init_dmars(void);
145 extern void free_dmar_iommu(struct intel_iommu *iommu);
147 extern int dmar_disabled;
149 #ifndef CONFIG_DMAR_GFX_WA
150 static inline void iommu_prepare_gfx_mapping(void)
154 #endif /* !CONFIG_DMAR_GFX_WA */