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From:   Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
To:     Will Deacon <will@kernel.org>, Robin Murphy <robin.murphy@arm.com>,
        Joerg Roedel <joro@8bytes.org>,
        Jordan Crouse <jcrouse@codeaurora.org>,
        Rob Clark <robdclark@gmail.com>
Cc:     iommu@lists.linux-foundation.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-arm-msm@vger.kernel.org,
        Akhil P Oommen <akhilpo@codeaurora.org>,
        freedreno@lists.freedesktop.org,
        "Kristian H . Kristensen" <hoegsberg@google.com>,
        dri-devel@lists.freedesktop.org,
        Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Subject: [PATCHv6 5/6] iommu: arm-smmu-impl: Use table to list QCOM implementations
Date:   Mon, 26 Oct 2020 17:24:04 +0530
Message-Id: <8b8f31fcf283124deee335012affe5bc527f6694.1603448364.git.saiprakash.ranjan@codeaurora.org>
In-Reply-To: <cover.1603448364.git.saiprakash.ranjan@codeaurora.org>
References: <cover.1603448364.git.saiprakash.ranjan@codeaurora.org>
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Use table and of_match_node() to match qcom implementation
instead of multiple of_device_compatible() calls for each
QCOM SMMU implementation.

Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
---
 drivers/iommu/arm/arm-smmu/arm-smmu-impl.c |  9 +--------
 drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 21 ++++++++++++++++-----
 drivers/iommu/arm/arm-smmu/arm-smmu.h      |  1 -
 3 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c b/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c
index d199b4bff15d..ffaf3f91ba52 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c
@@ -217,14 +217,7 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
 	if (of_device_is_compatible(np, "nvidia,tegra194-smmu"))
 		return nvidia_smmu_impl_init(smmu);
 
-	if (of_device_is_compatible(np, "qcom,sdm845-smmu-500") ||
-	    of_device_is_compatible(np, "qcom,sc7180-smmu-500") ||
-	    of_device_is_compatible(np, "qcom,sm8150-smmu-500") ||
-	    of_device_is_compatible(np, "qcom,sm8250-smmu-500"))
-		return qcom_smmu_impl_init(smmu);
-
-	if (of_device_is_compatible(smmu->dev->of_node, "qcom,adreno-smmu"))
-		return qcom_adreno_smmu_impl_init(smmu);
+	smmu = qcom_smmu_impl_init(smmu);
 
 	if (of_device_is_compatible(np, "marvell,ap806-smmu-500"))
 		smmu->impl = &mrvl_mmu500_impl;
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index 0663d7d26908..9c40fb7a2241 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -224,12 +224,23 @@ static struct arm_smmu_device *qcom_smmu_create(struct arm_smmu_device *smmu,
 	return &qsmmu->smmu;
 }
 
+static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
+	{ .compatible = "qcom,sc7180-smmu-500" },
+	{ .compatible = "qcom,sdm845-smmu-500" },
+	{ .compatible = "qcom,sm8150-smmu-500" },
+	{ .compatible = "qcom,sm8250-smmu-500" },
+	{ }
+};
+
 struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
 {
-	return qcom_smmu_create(smmu, &qcom_smmu_impl);
-}
+	const struct device_node *np = smmu->dev->of_node;
 
-struct arm_smmu_device *qcom_adreno_smmu_impl_init(struct arm_smmu_device *smmu)
-{
-	return qcom_smmu_create(smmu, &qcom_adreno_smmu_impl);
+	if (of_match_node(qcom_smmu_impl_of_match, np))
+		return qcom_smmu_create(smmu, &qcom_smmu_impl);
+
+	if (of_device_is_compatible(np, "qcom,adreno-smmu"))
+		return qcom_smmu_create(smmu, &qcom_adreno_smmu_impl);
+
+	return smmu;
 }
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.h b/drivers/iommu/arm/arm-smmu/arm-smmu.h
index 93593e164e44..94f3e439c082 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.h
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.h
@@ -524,7 +524,6 @@ static inline void arm_smmu_writeq(struct arm_smmu_device *smmu, int page,
 struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu);
 struct arm_smmu_device *nvidia_smmu_impl_init(struct arm_smmu_device *smmu);
 struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu);
-struct arm_smmu_device *qcom_adreno_smmu_impl_init(struct arm_smmu_device *smmu);
 
 void arm_smmu_write_context_bank(struct arm_smmu_device *smmu, int idx);
 int arm_mmu500_reset(struct arm_smmu_device *smmu);
-- 
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