[RFC PATCH 4/9] iommu/arm-smmu-qcom: Move implementation data into match data

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

In preparation to rework of the implementation and configuration
details, make qcom_smmu_create() accept new qcom_smmu_match_data
structure pointer. Make implementation a field in this struct.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 58 ++++++++++++++--------
 drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h |  4 ++
 2 files changed, 42 insertions(+), 20 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index b2708de25ea3..bd228b7d6817 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -405,10 +405,18 @@ 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 arm_smmu_impl *impl)
+		const struct qcom_smmu_match_data *data)
 {
+	const struct arm_smmu_impl *impl;
 	struct qcom_smmu *qsmmu;
 
+	if (!data)
+		return ERR_PTR(-EINVAL);
+
+	impl = data->impl;
+	if (!impl)
+		return smmu;
+
 	/* Check to make sure qcom_scm has finished probing */
 	if (!qcom_scm_is_available())
 		return ERR_PTR(-EPROBE_DEFER);
@@ -423,22 +431,30 @@ 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,
+};
+
+static const struct qcom_smmu_match_data qcom_adreno_smmu_data = {
+	.impl = &qcom_adreno_smmu_impl,
+};
+
 static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
-	{ .compatible = "qcom,msm8998-smmu-v2" },
-	{ .compatible = "qcom,qcm2290-smmu-500" },
-	{ .compatible = "qcom,sc7180-smmu-500" },
-	{ .compatible = "qcom,sc7280-smmu-500" },
-	{ .compatible = "qcom,sc8180x-smmu-500" },
-	{ .compatible = "qcom,sc8280xp-smmu-500" },
-	{ .compatible = "qcom,sdm630-smmu-v2" },
-	{ .compatible = "qcom,sdm845-smmu-500" },
-	{ .compatible = "qcom,sm6125-smmu-500" },
-	{ .compatible = "qcom,sm6350-smmu-500" },
-	{ .compatible = "qcom,sm6375-smmu-500" },
-	{ .compatible = "qcom,sm8150-smmu-500" },
-	{ .compatible = "qcom,sm8250-smmu-500" },
-	{ .compatible = "qcom,sm8350-smmu-500" },
-	{ .compatible = "qcom,sm8450-smmu-500" },
+	{ .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 },
+	{ .compatible = "qcom,sc7280-smmu-500", .data = &qcom_smmu_data },
+	{ .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-500", .data = &qcom_smmu_data },
+	{ .compatible = "qcom,sm6125-smmu-500", .data = &qcom_smmu_data },
+	{ .compatible = "qcom,sm6350-smmu-500", .data = &qcom_smmu_data },
+	{ .compatible = "qcom,sm6375-smmu-500", .data = &qcom_smmu_data },
+	{ .compatible = "qcom,sm8150-smmu-500", .data = &qcom_smmu_data },
+	{ .compatible = "qcom,sm8250-smmu-500", .data = &qcom_smmu_data },
+	{ .compatible = "qcom,sm8350-smmu-500", .data = &qcom_smmu_data },
+	{ .compatible = "qcom,sm8450-smmu-500", .data = &qcom_smmu_data },
 	{ }
 };
 
@@ -453,12 +469,13 @@ static struct acpi_platform_list qcom_acpi_platlist[] = {
 struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
 {
 	const struct device_node *np = smmu->dev->of_node;
+	const struct of_device_id *match;
 
 #ifdef CONFIG_ACPI
 	if (np == NULL) {
 		/* Match platform for ACPI boot */
 		if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)
-			return qcom_smmu_create(smmu, &qcom_smmu_impl);
+			return qcom_smmu_create(smmu, &qcom_smmu_data);
 	}
 #endif
 
@@ -469,10 +486,11 @@ struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
 	 * features if the order is changed.
 	 */
 	if (of_device_is_compatible(np, "qcom,adreno-smmu"))
-		return qcom_smmu_create(smmu, &qcom_adreno_smmu_impl);
+		return qcom_smmu_create(smmu, &qcom_adreno_smmu_data);
 
-	if (of_match_node(qcom_smmu_impl_of_match, np))
-		return qcom_smmu_create(smmu, &qcom_smmu_impl);
+	match = of_match_node(qcom_smmu_impl_of_match, np);
+	if (match)
+		return qcom_smmu_create(smmu, match->data);
 
 	return smmu;
 }
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h
index 99ec8f8629a0..2424f10b7110 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h
@@ -14,6 +14,10 @@ struct qcom_smmu {
 	u32 stall_enabled;
 };
 
+struct qcom_smmu_match_data {
+	const struct arm_smmu_impl *impl;
+};
+
 #ifdef CONFIG_ARM_SMMU_QCOM_DEBUG
 void qcom_smmu_tlb_sync_debug(struct arm_smmu_device *smmu);
 const void *qcom_smmu_impl_data(struct arm_smmu_device *smmu);
-- 
2.35.1