99126f7ce1
Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
40 lines
1,014 B
C
40 lines
1,014 B
C
#ifndef _DMA_REMAPPING_H
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#define _DMA_REMAPPING_H
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/*
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* VT-d hardware uses 4KiB page size regardless of host page size.
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*/
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#define VTD_PAGE_SHIFT (12)
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#define VTD_PAGE_SIZE (1UL << VTD_PAGE_SHIFT)
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#define VTD_PAGE_MASK (((u64)-1) << VTD_PAGE_SHIFT)
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#define VTD_PAGE_ALIGN(addr) (((addr) + VTD_PAGE_SIZE - 1) & VTD_PAGE_MASK)
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#define DMA_PTE_READ (1)
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#define DMA_PTE_WRITE (2)
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struct intel_iommu;
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struct dmar_domain;
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struct root_entry;
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/* PCI domain-device relationship */
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struct device_domain_info {
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struct list_head link; /* link to domain siblings */
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struct list_head global; /* link to global list */
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u8 bus; /* PCI bus numer */
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u8 devfn; /* PCI devfn number */
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struct pci_dev *dev; /* it's NULL for PCIE-to-PCI bridge */
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struct dmar_domain *domain; /* pointer to domain */
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};
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extern void free_dmar_iommu(struct intel_iommu *iommu);
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extern int dmar_disabled;
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#ifndef CONFIG_DMAR_GFX_WA
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static inline void iommu_prepare_gfx_mapping(void)
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{
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return;
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}
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#endif /* !CONFIG_DMAR_GFX_WA */
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#endif
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