| #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 DMA_PTE_READ (1) |
| #define DMA_PTE_WRITE (2) |
| |
| struct intel_iommu; |
| struct dmar_domain; |
| struct root_entry; |
| |
| /* PCI domain-device relationship */ |
| struct device_domain_info { |
| struct list_head link; /* link to domain siblings */ |
| struct list_head global; /* link to global list */ |
| u8 bus; /* PCI bus numer */ |
| u8 devfn; /* PCI devfn number */ |
| struct pci_dev *dev; /* it's NULL for PCIE-to-PCI bridge */ |
| struct dmar_domain *domain; /* pointer to domain */ |
| }; |
| |
| extern void free_dmar_iommu(struct intel_iommu *iommu); |
| |
| extern int dmar_disabled; |
| |
| #ifndef CONFIG_DMAR_GFX_WA |
| static inline void iommu_prepare_gfx_mapping(void) |
| { |
| return; |
| } |
| #endif /* !CONFIG_DMAR_GFX_WA */ |
| |
| #endif |