Commit 230309d0 authored by Tom Murphy's avatar Tom Murphy Committed by Will Deacon
Browse files

iommu: Add iommu_dma_free_cpu_cached_iovas() 



Add a iommu_dma_free_cpu_cached_iovas function to allow drivers which
use the dma-iommu ops to free cached cpu iovas.

Signed-off-by: default avatarTom Murphy <murphyt7@tcd.ie>
Signed-off-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Tested-by: default avatarLogan Gunthorpe <logang@deltatee.com>
Link: https://lore.kernel.org/r/20201124082057.2614359-3-baolu.lu@linux.intel.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 2a2b8eaa

drivers/iommu/dma-iommu.c

+9 −0
Original line number Diff line number Diff line
@@ -49,6 +49,15 @@ struct iommu_dma_cookie { 
	struct iommu_domain		*fq_domain;

};



void iommu_dma_free_cpu_cached_iovas(unsigned int cpu,

		struct iommu_domain *domain)

{

	struct iommu_dma_cookie *cookie = domain->iova_cookie;

	struct iova_domain *iovad = &cookie->iovad;



	free_cpu_cached_iovas(cpu, iovad);

}



static void iommu_dma_entry_dtor(unsigned long data)

{

	struct page *freelist = (struct page *)data;

include/linux/dma-iommu.h

+8 −0
Original line number Diff line number Diff line
@@ -37,6 +37,9 @@ void iommu_dma_compose_msi_msg(struct msi_desc *desc, 


void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list);



void iommu_dma_free_cpu_cached_iovas(unsigned int cpu,

		struct iommu_domain *domain);



#else /* CONFIG_IOMMU_DMA */



struct iommu_domain;
@@ -78,5 +81,10 @@ static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_he 
{

}



static inline void iommu_dma_free_cpu_cached_iovas(unsigned int cpu,

		struct iommu_domain *domain)

{

}



#endif	/* CONFIG_IOMMU_DMA */

#endif	/* __DMA_IOMMU_H */