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Commit 90d80a06 authored by Liam Mark's avatar Liam Mark Committed by Gerrit - the friendly Code Review server
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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>
parent f18f48d7

drivers/iommu/iommu.c

+7 −0
Original line number Diff line number Diff line
@@ -1336,6 +1336,13 @@ 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);

}

static unsigned long iommu_get_pgsize_bitmap(struct iommu_domain *domain)

{

	if (domain->ops->get_pgsize_bitmap)

include/linux/iommu.h

+9 −0
Original line number Diff line number Diff line
@@ -237,6 +237,7 @@ struct iommu_ops { 
#endif



	unsigned long (*get_pgsize_bitmap)(struct iommu_domain *domain);

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

	unsigned long pgsize_bitmap;

	void *priv;

};
@@ -273,6 +274,8 @@ 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);

extern void iommu_trigger_fault(struct iommu_domain *domain,
@@ -505,6 +508,12 @@ 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)

{