Subject: [PATCH 8/9] drm/gpu, iommu/io-pgtable: switch to iova_to_phys_length

From: Guanghui Feng <[email-masked]>
Date: Sun, 31 May 2026 17:36:36 +0800

Migrate remaining callers of io_pgtable_ops.iova_to_phys:
- panthor_mmu: use ops->iova_to_phys_length(ops, iova, NULL)
- panfrost_mmu: same
- io-pgtable selftests: use iova_to_phys_length with NULL

Signed-off-by: Guanghui Feng <[email-masked]>
Acked-by: Shiqiang Zhang <[email-masked]>
Acked-by: Simon Guo <[email-masked]>
---
 drivers/gpu/drm/panfrost/panfrost_mmu.c  |  2 +-
 drivers/gpu/drm/panthor/panthor_mmu.c    |  2 +-
 drivers/iommu/io-pgtable-arm-selftests.c | 12 ++++++------
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
index 4a3162c3b659..b7c420eb76ec 100644
--- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
@@ -514,7 +514,7 @@ void panfrost_mmu_unmap(struct panfrost_gem_mapping *mapping)
 
 		if (bo->is_heap)
 			pgcount = 1;
-		if (!bo->is_heap || ops->iova_to_phys(ops, iova)) {
+		if (!bo->is_heap || ops->iova_to_phys_length(ops, iova, NULL)) {
 			unmapped_page = ops->unmap_pages(ops, iova, pgsize, pgcount, NULL);
 			WARN_ON(unmapped_page != pgsize * pgcount);
 		}
diff --git a/drivers/gpu/drm/panthor/panthor_mmu.c b/drivers/gpu/drm/panthor/panthor_mmu.c
index 75d98dad7b1d..05bc7ec95931 100644
--- a/drivers/gpu/drm/panthor/panthor_mmu.c
+++ b/drivers/gpu/drm/panthor/panthor_mmu.c
@@ -903,7 +903,7 @@ static void panthor_vm_unmap_pages(struct panthor_vm *vm, u64 iova, u64 size)
 			 * are out-of-sync. This is not supposed to happen, hence the
 			 * above WARN_ON().
 			 */
-			while (!ops->iova_to_phys(ops, iova + unmapped_sz) &&
+			while (!ops->iova_to_phys_length(ops, iova + unmapped_sz, NULL) &&
 			       unmapped_sz < pgsize * pgcount)
 				unmapped_sz += SZ_4K;
 
diff --git a/drivers/iommu/io-pgtable-arm-selftests.c b/drivers/iommu/io-pgtable-arm-selftests.c
index 334e70350924..d1d0529f711d 100644
--- a/drivers/iommu/io-pgtable-arm-selftests.c
+++ b/drivers/iommu/io-pgtable-arm-selftests.c
@@ -72,13 +72,13 @@ static int arm_lpae_run_tests(struct kunit *test, struct io_pgtable_cfg *cfg)
 		 * Initial sanity checks.
 		 * Empty page tables shouldn't provide any translations.
 		 */
-		if (ops->iova_to_phys(ops, 42))
+		if (ops->iova_to_phys_length(ops, 42, NULL))
 			return __FAIL(test, i);
 
-		if (ops->iova_to_phys(ops, SZ_1G + 42))
+		if (ops->iova_to_phys_length(ops, SZ_1G + 42, NULL))
 			return __FAIL(test, i);
 
-		if (ops->iova_to_phys(ops, SZ_2G + 42))
+		if (ops->iova_to_phys_length(ops, SZ_2G + 42, NULL))
 			return __FAIL(test, i);
 
 		/*
@@ -100,7 +100,7 @@ static int arm_lpae_run_tests(struct kunit *test, struct io_pgtable_cfg *cfg)
 					    GFP_KERNEL, &mapped))
 				return __FAIL(test, i);
 
-			if (ops->iova_to_phys(ops, iova + 42) != (iova + 42))
+			if (ops->iova_to_phys_length(ops, iova + 42, NULL) != (iova + 42))
 				return __FAIL(test, i);
 
 			iova += SZ_1G;
@@ -114,7 +114,7 @@ static int arm_lpae_run_tests(struct kunit *test, struct io_pgtable_cfg *cfg)
 			if (ops->unmap_pages(ops, iova, size, 1, NULL) != size)
 				return __FAIL(test, i);
 
-			if (ops->iova_to_phys(ops, iova + 42))
+			if (ops->iova_to_phys_length(ops, iova + 42, NULL))
 				return __FAIL(test, i);
 
 			/* Remap full block */
@@ -122,7 +122,7 @@ static int arm_lpae_run_tests(struct kunit *test, struct io_pgtable_cfg *cfg)
 					   IOMMU_WRITE, GFP_KERNEL, &mapped))
 				return __FAIL(test, i);
 
-			if (ops->iova_to_phys(ops, iova + 42) != (iova + 42))
+			if (ops->iova_to_phys_length(ops, iova + 42, NULL) != (iova + 42))
 				return __FAIL(test, i);
 
 			iova += SZ_1G;
-- 
2.43.7