Re: [PATCH v6 10/25] iommu/exynos: Implement an IDENTITY domain

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On 2023/8/3 8:07, Jason Gunthorpe wrote:
What exynos calls exynos_iommu_detach_device is actually putting the iommu
into identity mode.

Move to the new core support for ARM_DMA_USE_IOMMU by defining
ops->identity_domain.

Tested-by: Marek Szyprowski<m.szyprowski@xxxxxxxxxxx>
Acked-by: Marek Szyprowski<m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Jason Gunthorpe<jgg@xxxxxxxxxx>
---
  drivers/iommu/exynos-iommu.c | 66 +++++++++++++++++-------------------
  1 file changed, 32 insertions(+), 34 deletions(-)

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index c275fe71c4db32..5e12b85dfe8705 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -24,6 +24,7 @@
typedef u32 sysmmu_iova_t;
  typedef u32 sysmmu_pte_t;
+static struct iommu_domain exynos_identity_domain;

Is there a conflict between above and below?

[...]


+static struct iommu_domain_ops exynos_identity_ops = {
+	.attach_dev = exynos_iommu_identity_attach,
+};
+
+static struct iommu_domain exynos_identity_domain = {

here.

Both define the same.

+	.type = IOMMU_DOMAIN_IDENTITY,
+	.ops = &exynos_identity_ops,
+};

Best regards,
baolu



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