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Commit 5bb64228 authored by Liam Mark's avatar Liam Mark Committed by Patrick Daly
Browse files

iommu: support querying IOVA coherency 



Support querying whether an IOVA is mapped as coherent.

Change-Id: Icd122348e309495b09bcf77628aa1746f0255305
Signed-off-by: default avatarLiam Mark <lmark@codeaurora.org>
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
parent 17f31800

drivers/iommu/iommu.c

+8 −0
Original line number Diff line number Diff line
@@ -1286,6 +1286,14 @@ phys_addr_t iommu_iova_to_phys_hard(struct iommu_domain *domain, 
	return domain->ops->iova_to_phys_hard(domain, iova);

}



bool iommu_is_iova_coherent(struct iommu_domain *domain, dma_addr_t iova)

{

	if (unlikely(domain->ops->is_iova_coherent == NULL))

		return 0;



	return domain->ops->is_iova_coherent(domain, iova);

}



size_t iommu_pgsize(unsigned long pgsize_bitmap,

		    unsigned long addr_merge, size_t size)

{

include/linux/iommu.h

+9 −0
Original line number Diff line number Diff line
@@ -245,6 +245,7 @@ struct iommu_ops { 


	int (*of_xlate)(struct device *dev, struct of_phandle_args *args);



	bool (*is_iova_coherent)(struct iommu_domain *domain, dma_addr_t iova);

	unsigned long pgsize_bitmap;

};
@@ -278,6 +279,8 @@ extern size_t default_iommu_map_sg(struct iommu_domain *domain, unsigned long io 
extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);

extern phys_addr_t iommu_iova_to_phys_hard(struct iommu_domain *domain,

					   dma_addr_t iova);

extern bool iommu_is_iova_coherent(struct iommu_domain *domain,

				dma_addr_t iova);

extern void iommu_set_fault_handler(struct iommu_domain *domain,

			iommu_fault_handler_t handler, void *token);
@@ -519,6 +522,12 @@ static inline phys_addr_t iommu_iova_to_phys_hard(struct iommu_domain *domain, 
	return 0;

}



static inline bool iommu_is_iova_coherent(struct iommu_domain *domain,

					  dma_addr_t iova)

{

	return 0;

}



static inline void iommu_set_fault_handler(struct iommu_domain *domain,

				iommu_fault_handler_t handler, void *token)

{