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iommu: support querying IOVA coherency

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Support querying whether an IOVA is mapped as coherent.

Change-Id: Icd122348e309495b09bcf77628aa1746f0255305
Signed-off-by: Liam Mark <lmark@codeaurora.org>
This commit is contained in:
Liam Mark 2016-12-09 14:36:07 -08:00 • committed by Gerrit - the friendly Code Review server
parent f18f48d761
commit 90d80a06de
2 changed files with 16 additions and 0 deletions
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7
drivers/iommu/iommu.c
View file

@ -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)

9
include/linux/iommu.h
View file

@ -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)
{