diff mbox series

[v4,1/2] iommu/arm-smmu-qcom: Fix missing adreno_smmu's

Message ID 20230516222039.907690-1-robdclark@gmail.com (mailing list archive)
State New, archived
Headers show
Series [v4,1/2] iommu/arm-smmu-qcom: Fix missing adreno_smmu's | expand

Commit Message

Rob Clark May 16, 2023, 10:20 p.m. UTC 
From: Rob Clark <robdclark@chromium.org>

When the special handling of qcom,adreno-smmu was moved into
qcom_smmu_create(), it was overlooked that we didn't have all the
required entries in qcom_smmu_impl_of_match.  So we stopped getting
adreno_smmu_priv on sc7180, breaking per-process pgtables.

Fixes: 30b912a03d91 ("iommu/arm-smmu-qcom: Move the qcom,adreno-smmu check into qcom_smmu_create")
Cc: <stable@vger.kernel.org>
Suggested-by: Lepton Wu <lepton@chromium.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
 drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

Comments

Dmitry Baryshkov May 16, 2023, 11:22 p.m. UTC | #1 
On 17/05/2023 01:20, Rob Clark wrote:
> From: Rob Clark <robdclark@chromium.org>
> 
> When the special handling of qcom,adreno-smmu was moved into
> qcom_smmu_create(), it was overlooked that we didn't have all the
> required entries in qcom_smmu_impl_of_match.  So we stopped getting
> adreno_smmu_priv on sc7180, breaking per-process pgtables.
> 
> Fixes: 30b912a03d91 ("iommu/arm-smmu-qcom: Move the qcom,adreno-smmu check into qcom_smmu_create")
> Cc: <stable@vger.kernel.org>
> Suggested-by: Lepton Wu <lepton@chromium.org>
> Signed-off-by: Rob Clark <robdclark@chromium.org>
> Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
> ---
>   drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 10 ++++++++++
>   1 file changed, 10 insertions(+)

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
diff mbox series

Patch

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index d1b296b95c86..ec743a9ec67a 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -496,20 +496,21 @@  static const struct qcom_smmu_match_data qcom_smmu_500_impl0_data = {
 /*
  * Do not add any more qcom,SOC-smmu-500 entries to this list, unless they need
  * special handling and can not be covered by the qcom,smmu-500 entry.
  */
 static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
 	{ .compatible = "qcom,msm8996-smmu-v2", .data = &msm8996_smmu_data },
 	{ .compatible = "qcom,msm8998-smmu-v2", .data = &qcom_smmu_v2_data },
 	{ .compatible = "qcom,qcm2290-smmu-500", .data = &qcom_smmu_500_impl0_data },
 	{ .compatible = "qcom,qdu1000-smmu-500", .data = &qcom_smmu_500_impl0_data  },
 	{ .compatible = "qcom,sc7180-smmu-500", .data = &qcom_smmu_500_impl0_data },
+	{ .compatible = "qcom,sc7180-smmu-v2", .data = &qcom_smmu_v2_data },
 	{ .compatible = "qcom,sc7280-smmu-500", .data = &qcom_smmu_500_impl0_data },
 	{ .compatible = "qcom,sc8180x-smmu-500", .data = &qcom_smmu_500_impl0_data },
 	{ .compatible = "qcom,sc8280xp-smmu-500", .data = &qcom_smmu_500_impl0_data },
 	{ .compatible = "qcom,sdm630-smmu-v2", .data = &qcom_smmu_v2_data },
 	{ .compatible = "qcom,sdm845-smmu-v2", .data = &qcom_smmu_v2_data },
 	{ .compatible = "qcom,sdm845-smmu-500", .data = &sdm845_smmu_500_data },
 	{ .compatible = "qcom,sm6115-smmu-500", .data = &qcom_smmu_500_impl0_data},
 	{ .compatible = "qcom,sm6125-smmu-500", .data = &qcom_smmu_500_impl0_data },
 	{ .compatible = "qcom,sm6350-smmu-v2", .data = &qcom_smmu_v2_data },
 	{ .compatible = "qcom,sm6350-smmu-500", .data = &qcom_smmu_500_impl0_data },
@@ -540,12 +541,21 @@  struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
 		/* Match platform for ACPI boot */
 		if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)
 			return qcom_smmu_create(smmu, &qcom_smmu_500_impl0_data);
 	}
 #endif
 
 	match = of_match_node(qcom_smmu_impl_of_match, np);
 	if (match)
 		return qcom_smmu_create(smmu, match->data);
 
+	/*
+	 * If you hit this WARN_ON() you are missing an entry in the
+	 * qcom_smmu_impl_of_match[] table, and GPU per-process page-
+	 * tables will be broken.
+	 */
+	WARN(of_device_is_compatible(np, "qcom,adreno-smmu"),
+	     "Missing qcom_smmu_impl_of_match entry for: %s",
+	     dev_name(smmu->dev));
+
 	return smmu;
 }