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 DMA_PTE_READ (1)
13 #define DMA_PTE_WRITE (2)
19 /* PCI domain-device relationship */
20 struct device_domain_info {
21 struct list_head link; /* link to domain siblings */
22 struct list_head global; /* link to global list */
23 u8 bus; /* PCI bus numer */
24 u8 devfn; /* PCI devfn number */
25 struct pci_dev *dev; /* it's NULL for PCIE-to-PCI bridge */
26 struct dmar_domain *domain; /* pointer to domain */
29 extern void free_dmar_iommu(struct intel_iommu *iommu);
31 extern int dmar_disabled;
33 #ifndef CONFIG_DMAR_GFX_WA
34 static inline void iommu_prepare_gfx_mapping(void)
38 #endif /* !CONFIG_DMAR_GFX_WA */