Re: [PATCH v15 5/5] iommu/arm-smmu: add ACTLR data and support for qcom_smmu_500

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On 9/20/2024 9:48 PM, Dmitry Baryshkov wrote:
On Fri, Sep 20, 2024 at 09:28:13PM GMT, Bibek Kumar Patro wrote:
Add ACTLR data table for qcom_smmu_500 including
corresponding data entry and set prefetch value by
way of a list of compatible strings.

Signed-off-by: Bibek Kumar Patro <quic_bibekkum@xxxxxxxxxxx>
---
  drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 24 ++++++++++++++++++++++
  1 file changed, 24 insertions(+)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index 4ac272d05843..e8f936a446df 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -25,8 +25,31 @@

  #define CPRE			(1 << 1)
  #define CMTLB			(1 << 0)
+#define PREFETCH_SHIFT		8
+#define PREFETCH_DEFAULT	0
+#define PREFETCH_SHALLOW	(1 << PREFETCH_SHIFT)
+#define PREFETCH_MODERATE	(2 << PREFETCH_SHIFT)
+#define PREFETCH_DEEP		(3 << PREFETCH_SHIFT)
  #define GFX_ACTLR_PRR		(1 << 5)

+static const struct of_device_id qcom_smmu_actlr_client_of_match[] = {
+	{ .compatible = "qcom,adreno",
+			.data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
+	{ .compatible = "qcom,adreno-gmu",
+			.data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
+	{ .compatible = "qcom,adreno-smmu",
+			.data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
+	{ .compatible = "qcom,fastrpc",
+			.data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
+	{ .compatible = "qcom,sc7280-mdss",
+			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
+	{ .compatible = "qcom,sc7280-venus",
+			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
+	{ .compatible = "qcom,sm8550-mdss",
+			.data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
+	{ }
+};

Wow, this looks really nice now!


I am also in favor of this compatible based approach now,
as it looks to be much cleaner implementation.

+
  static struct qcom_smmu *to_qcom_smmu(struct arm_smmu_device *smmu)
  {
  	return container_of(smmu, struct qcom_smmu, smmu);
@@ -640,6 +663,7 @@ static const struct qcom_smmu_match_data qcom_smmu_500_impl0_data = {
  	.impl = &qcom_smmu_500_impl,
  	.adreno_impl = &qcom_adreno_smmu_500_impl,
  	.cfg = &qcom_smmu_impl0_cfg,
+	.client_match = qcom_smmu_actlr_client_of_match,
  };

  /*
--
2.34.1






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