Commit 2ebbd258 authored by Yong Wu's avatar Yong Wu Committed by Will Deacon
Browse files

iommu: Add iova and size as parameters in iotlb_sync_map 



iotlb_sync_map allow IOMMU drivers tlb sync after completing the whole
mapping. This patch adds iova and size as the parameters in it. then the
IOMMU driver could flush tlb with the whole range once after iova mapping
to improve performance.

Signed-off-by: default avatarYong Wu <yong.wu@mediatek.com>
Reviewed-by: default avatarRobin Murphy <robin.murphy@arm.com>
Acked-by: default avatarWill Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210107122909.16317-3-yong.wu@mediatek.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent d8c1df02

drivers/iommu/iommu.c

+2 −2
Original line number Diff line number Diff line
@@ -2443,7 +2443,7 @@ static int _iommu_map(struct iommu_domain *domain, unsigned long iova, 


	ret = __iommu_map(domain, iova, paddr, size, prot, GFP_KERNEL);

	if (ret == 0 && ops->iotlb_sync_map)

		ops->iotlb_sync_map(domain);

		ops->iotlb_sync_map(domain, iova, size);



	return ret;

}
@@ -2575,7 +2575,7 @@ static size_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova, 
	}



	if (ops->iotlb_sync_map)

		ops->iotlb_sync_map(domain);

		ops->iotlb_sync_map(domain, iova, mapped);

	return mapped;



out_err:

drivers/iommu/tegra-gart.c

+5 −2
Original line number Diff line number Diff line
@@ -261,7 +261,8 @@ static int gart_iommu_of_xlate(struct device *dev, 
	return 0;

}



static void gart_iommu_sync_map(struct iommu_domain *domain)

static void gart_iommu_sync_map(struct iommu_domain *domain, unsigned long iova,

				size_t size)

{

	FLUSH_GART_REGS(gart_handle);

}
@@ -269,7 +270,9 @@ static void gart_iommu_sync_map(struct iommu_domain *domain) 
static void gart_iommu_sync(struct iommu_domain *domain,

			    struct iommu_iotlb_gather *gather)

{

	gart_iommu_sync_map(domain);

	size_t length = gather->end - gather->start;



	gart_iommu_sync_map(domain, gather->start, length);

}



static const struct iommu_ops gart_iommu_ops = {

include/linux/iommu.h

+2 −1
Original line number Diff line number Diff line
@@ -246,7 +246,8 @@ struct iommu_ops { 
	size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,

		     size_t size, struct iommu_iotlb_gather *iotlb_gather);

	void (*flush_iotlb_all)(struct iommu_domain *domain);

	void (*iotlb_sync_map)(struct iommu_domain *domain);

	void (*iotlb_sync_map)(struct iommu_domain *domain, unsigned long iova,

			       size_t size);

	void (*iotlb_sync)(struct iommu_domain *domain,

			   struct iommu_iotlb_gather *iotlb_gather);

	phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);