Subject: [PATCH v3 09/32] iommu/apple-dart: implement iova_to_phys_length

From: Guanghui Feng <[email-masked]>
Date: Wed, 3 Jun 2026 23:17:41 +0800

Migrate Apple DART to implement iova_to_phys_length, passing through
mapped_length from io-pgtable.

Signed-off-by: Guanghui Feng <[email-masked]>
---
 drivers/iommu/apple-dart.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c
index 17bdadb6b504..fdc533ba72da 100644
--- a/drivers/iommu/apple-dart.c
+++ b/drivers/iommu/apple-dart.c
@@ -528,16 +528,17 @@ static int apple_dart_iotlb_sync_map(struct iommu_domain *domain,
 	return 0;
 }
 
-static phys_addr_t apple_dart_iova_to_phys(struct iommu_domain *domain,
-					   dma_addr_t iova)
+static phys_addr_t apple_dart_iova_to_phys_length(struct iommu_domain *domain,
+					   dma_addr_t iova, size_t *mapped_length)
 {
 	struct apple_dart_domain *dart_domain = to_dart_domain(domain);
 	struct io_pgtable_ops *ops = dart_domain->pgtbl_ops;
 
+
 	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 int apple_dart_map_pages(struct iommu_domain *domain, unsigned long iova,
@@ -1018,7 +1019,7 @@ static const struct iommu_ops apple_dart_iommu_ops = {
 		.flush_iotlb_all = apple_dart_flush_iotlb_all,
 		.iotlb_sync	= apple_dart_iotlb_sync,
 		.iotlb_sync_map	= apple_dart_iotlb_sync_map,
-		.iova_to_phys	= apple_dart_iova_to_phys,
+		.iova_to_phys_length = apple_dart_iova_to_phys_length,
 		.free		= apple_dart_domain_free,
 	}
 };
-- 
2.43.7