Subject: [PATCH v2 08/30] iommu/qcom_iommu: implement iova_to_phys_length

From: Guanghui Feng <[email-masked]>
Date: Tue, 2 Jun 2026 18:46:15 +0800

Migrate Qualcomm IOMMU to implement iova_to_phys_length, calling
ops->iova_to_phys_length on the io-pgtable layer.

Signed-off-by: Guanghui Feng <[email-masked]>
---
 drivers/iommu/arm/arm-smmu/qcom_iommu.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu/qcom_iommu.c b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
index a1e8cf29f594..b36e31509c91 100644
--- a/drivers/iommu/arm/arm-smmu/qcom_iommu.c
+++ b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
@@ -489,19 +489,22 @@ static void qcom_iommu_iotlb_sync(struct iommu_domain *domain,
 	qcom_iommu_flush_iotlb_all(domain);
 }
 
-static phys_addr_t qcom_iommu_iova_to_phys(struct iommu_domain *domain,
-					   dma_addr_t iova)
+static phys_addr_t qcom_iommu_iova_to_phys_length(struct iommu_domain *domain,
+					   dma_addr_t iova, size_t *mapped_length)
 {
 	phys_addr_t ret;
 	unsigned long flags;
 	struct qcom_iommu_domain *qcom_domain = to_qcom_iommu_domain(domain);
 	struct io_pgtable_ops *ops = qcom_domain->pgtbl_ops;
 
+	if (mapped_length)
+		*mapped_length = 0;
+
 	if (!ops)
-		return 0;
+		return PHYS_ADDR_MAX;
 
 	spin_lock_irqsave(&qcom_domain->pgtbl_lock, flags);
-	ret = ops->iova_to_phys(ops, iova);
+	ret = ops->iova_to_phys_length(ops, iova, mapped_length);
 	spin_unlock_irqrestore(&qcom_domain->pgtbl_lock, flags);
 
 	return ret;
@@ -602,7 +605,7 @@ static const struct iommu_ops qcom_iommu_ops = {
 		.unmap_pages	= qcom_iommu_unmap,
 		.flush_iotlb_all = qcom_iommu_flush_iotlb_all,
 		.iotlb_sync	= qcom_iommu_iotlb_sync,
-		.iova_to_phys	= qcom_iommu_iova_to_phys,
+		.iova_to_phys_length = qcom_iommu_iova_to_phys_length,
 		.free		= qcom_iommu_domain_free,
 	}
 };
-- 
2.43.7