[PATCH v2 06/30] iommu/arm-smmu-v3: implement iova_to_phys_length

[Guanghui Feng]

Migrate ARM SMMUv3 to implement iova_to_phys_length, calling
ops->iova_to_phys_length on the io-pgtable layer.

Signed-off-by: Guanghui Feng <guanghuifeng@xxxxxxxxxxxxxxxxx>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index e8d7dbe495f0..69fb7ce74681 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -4069,14 +4069,18 @@ static void arm_smmu_iotlb_sync(struct iommu_domain *domain,
 }
 
 static phys_addr_t
-arm_smmu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
+arm_smmu_iova_to_phys_length(struct iommu_domain *domain, dma_addr_t iova,
+			     size_t *mapped_length)
 {
 	struct io_pgtable_ops *ops = to_smmu_domain(domain)->pgtbl_ops;
 
+	if (mapped_length)
+		*mapped_length = 0;
+
 	if (!ops)
-		return 0;
+		return PHYS_ADDR_MAX;
 
-	return ops->iova_to_phys(ops, iova);
+	return ops->iova_to_phys_length(ops, iova, mapped_length);
 }
 
 static struct platform_driver arm_smmu_driver;
@@ -4396,7 +4400,7 @@ static const struct iommu_ops arm_smmu_ops = {
 		.unmap_pages		= arm_smmu_unmap_pages,
 		.flush_iotlb_all	= arm_smmu_flush_iotlb_all,
 		.iotlb_sync		= arm_smmu_iotlb_sync,
-		.iova_to_phys		= arm_smmu_iova_to_phys,
+		.iova_to_phys_length	= arm_smmu_iova_to_phys_length,
 		.free			= arm_smmu_domain_free_paging,
 	}
 };
-- 
2.43.7