iommu: Introduce iommu_iotlb_gather_add_page() (4fcf8544) · Commits · 戴 / test

include/linux/iommu.h

+31 −0

Original line number	Diff line number	Diff line
		@@ -507,6 +507,31 @@ static inline void iommu_tlb_sync(struct iommu_domain *domain,
		iommu_iotlb_gather_init(iotlb_gather);
		}

		static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
		struct iommu_iotlb_gather *gather,
		unsigned long iova, size_t size)
		{
		unsigned long start = iova, end = start + size;

		/*
		* If the new page is disjoint from the current range or is mapped at
		* a different granularity, then sync the TLB so that the gather
		* structure can be rewritten.
		*/
		if (gather->pgsize != size \|\|
		end < gather->start \|\| start > gather->end) {
		if (gather->pgsize)
		iommu_tlb_sync(domain, gather);
		gather->pgsize = size;
		}

		if (gather->end < end)
		gather->end = end;

		if (gather->start > start)
		gather->start = start;
		}

		/* PCI device grouping function */
		extern struct iommu_group pci_device_group(struct device dev);
		/* Generic device grouping function */
		@@ -847,6 +872,12 @@ static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
		{
		}

		static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
		struct iommu_iotlb_gather *gather,
		unsigned long iova, size_t size)
		{
		}

		static inline void iommu_device_unregister(struct iommu_device *iommu)
		{
		}