Re: [RFC PATCH 5/9] iommu/arm-smmu-qcom: Move the qcom,adreno-smmu check into qcom_smmu_create

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 10/21/2022 10:25 PM, Dmitry Baryshkov wrote:
Move special handling of qcom,adreno-smmu into qcom_smmu_create()
function. This allows us to further customize the Adreno SMMU
implementation.

Note, this also adds two entries to the qcom_smmu_impl_of_match table.
They were used with the qcom,adreno-smmu compat and were handled by the
removed clause.


Reviewed-by: Sai Prakash Ranjan <quic_saipraka@xxxxxxxxxxx>
Tested-by: Sai Prakash Ranjan <quic_saipraka@xxxxxxxxxxx>

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
  drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 32 ++++++++++++----------
  drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h |  1 +
  2 files changed, 19 insertions(+), 14 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index bd228b7d6817..c3bcd6eb2f42 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -407,13 +407,18 @@ static const struct arm_smmu_impl qcom_adreno_smmu_impl = {
  static struct arm_smmu_device *qcom_smmu_create(struct arm_smmu_device *smmu,
  		const struct qcom_smmu_match_data *data)
  {
+	const struct device_node *np = smmu->dev->of_node;
  	const struct arm_smmu_impl *impl;
  	struct qcom_smmu *qsmmu;
if (!data)
  		return ERR_PTR(-EINVAL);
- impl = data->impl;
+	if (np && of_device_is_compatible(np, "qcom,adreno-smmu"))
+		impl = data->adreno_impl;
+	else
+		impl = data->impl;
+
  	if (!impl)
  		return smmu;
@@ -431,15 +436,22 @@ static struct arm_smmu_device *qcom_smmu_create(struct arm_smmu_device *smmu,
  	return &qsmmu->smmu;
  }
-static const struct qcom_smmu_match_data qcom_smmu_data = {
-	.impl = &qcom_smmu_impl,
+/*
+ * It is not yet possible to use MDP SMMU with the bypass quirk on the msm8996,
+ * there are not enough context banks.
+ */
+static const struct qcom_smmu_match_data msm8996_smmu_data = {
+	.impl = NULL,
+	.adreno_impl = &qcom_adreno_smmu_impl,
  };
-static const struct qcom_smmu_match_data qcom_adreno_smmu_data = {
-	.impl = &qcom_adreno_smmu_impl,
+static const struct qcom_smmu_match_data qcom_smmu_data = {
+	.impl = &qcom_smmu_impl,
+	.adreno_impl = &qcom_adreno_smmu_impl,
  };
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_data },
  	{ .compatible = "qcom,qcm2290-smmu-500", .data = &qcom_smmu_data },
  	{ .compatible = "qcom,sc7180-smmu-500", .data = &qcom_smmu_data },
@@ -447,6 +459,7 @@ static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
  	{ .compatible = "qcom,sc8180x-smmu-500", .data = &qcom_smmu_data },
  	{ .compatible = "qcom,sc8280xp-smmu-500", .data = &qcom_smmu_data },
  	{ .compatible = "qcom,sdm630-smmu-v2", .data = &qcom_smmu_data },
+	{ .compatible = "qcom,sdm845-smmu-v2", .data = &qcom_smmu_data },
  	{ .compatible = "qcom,sdm845-smmu-500", .data = &qcom_smmu_data },
  	{ .compatible = "qcom,sm6125-smmu-500", .data = &qcom_smmu_data },
  	{ .compatible = "qcom,sm6350-smmu-500", .data = &qcom_smmu_data },
@@ -479,15 +492,6 @@ struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
  	}
  #endif
- /*
-	 * Do not change this order of implementation, i.e., first adreno
-	 * smmu impl and then apss smmu since we can have both implementing
-	 * arm,mmu-500 in which case we will miss setting adreno smmu specific
-	 * features if the order is changed.
-	 */
-	if (of_device_is_compatible(np, "qcom,adreno-smmu"))
-		return qcom_smmu_create(smmu, &qcom_adreno_smmu_data);
-
  	match = of_match_node(qcom_smmu_impl_of_match, np);
  	if (match)
  		return qcom_smmu_create(smmu, match->data);
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h
index 2424f10b7110..424d8d342ce0 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h
@@ -16,6 +16,7 @@ struct qcom_smmu {
struct qcom_smmu_match_data {
  	const struct arm_smmu_impl *impl;
+	const struct arm_smmu_impl *adreno_impl;
  };
#ifdef CONFIG_ARM_SMMU_QCOM_DEBUG




[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]


  Powered by Linux