linux-kernel - [PATCH v3 2/2] iommu/arm-smmu: Add support for Adreno GPU pagetable formats

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Message-Id: <1565216500-28506-3-git-send-email-jcrouse@codeaurora.org>
Date:   Wed,  7 Aug 2019 16:21:40 -0600
From:   Jordan Crouse <jcrouse@...eaurora.org>
To:     freedreno@...ts.freedesktop.org
Cc:     jean-philippe.brucker@....com, linux-arm-msm@...r.kernel.org,
        robin.murphy@....com, Will Deacon <will@...nel.org>,
        linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        Joerg Roedel <joro@...tes.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v3 2/2] iommu/arm-smmu: Add support for Adreno GPU pagetable formats

Add support for an Adreno GPU variant of the arm-smmu device to enable
a special pagetable format that enables TTBR1 and leaves TTBR0 free
to be switched by the GPU hardware.

Signed-off-by: Jordan Crouse <jcrouse@...eaurora.org>
---

 drivers/iommu/arm-smmu.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index aa06498..129ac83 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -124,6 +124,7 @@ enum arm_smmu_implementation {
 	ARM_MMU500,
 	CAVIUM_SMMUV2,
 	QCOM_SMMUV2,
+	ADRENO_SMMUV2,
 };
 
 struct arm_smmu_s2cr {
@@ -832,7 +833,10 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
 		ias = smmu->va_size;
 		oas = smmu->ipa_size;
 		if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH64) {
-			fmt = ARM_64_LPAE_S1;
+			if (smmu->model == ADRENO_SMMUV2)
+				fmt = ARM_ADRENO_GPU_LPAE;
+			else
+				fmt = ARM_64_LPAE_S1;
 		} else if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH32_L) {
 			fmt = ARM_32_LPAE_S1;
 			ias = min(ias, 32UL);
@@ -2030,6 +2034,7 @@ ARM_SMMU_MATCH_DATA(arm_mmu401, ARM_SMMU_V1_64K, GENERIC_SMMU);
 ARM_SMMU_MATCH_DATA(arm_mmu500, ARM_SMMU_V2, ARM_MMU500);
 ARM_SMMU_MATCH_DATA(cavium_smmuv2, ARM_SMMU_V2, CAVIUM_SMMUV2);
 ARM_SMMU_MATCH_DATA(qcom_smmuv2, ARM_SMMU_V2, QCOM_SMMUV2);
+ARM_SMMU_MATCH_DATA(adreno_smmuv2, ARM_SMMU_V2, ADRENO_SMMUV2);
 
 static const struct of_device_id arm_smmu_of_match[] = {
 	{ .compatible = "arm,smmu-v1", .data = &smmu_generic_v1 },
@@ -2039,6 +2044,7 @@ static const struct of_device_id arm_smmu_of_match[] = {
 	{ .compatible = "arm,mmu-500", .data = &arm_mmu500 },
 	{ .compatible = "cavium,smmu-v2", .data = &cavium_smmuv2 },
 	{ .compatible = "qcom,smmu-v2", .data = &qcom_smmuv2 },
+	{ .compatible = "qcom,adreno-smmu-v2", .data = &adreno_smmuv2 },
 	{ },
 };
 
-- 
2.7.4