From: Jordan Crouse <jcrouse@codeaurora.org>
To: linux-arm-msm@vger.kernel.org
Cc: iommu@lists.linux-foundation.org,
freedreno@lists.freedesktop.org, Joerg Roedel <joro@8bytes.org>,
Robin Murphy <robin.murphy@arm.com>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v8 5/7] iommu/arm-smmu: Add implementation for the adreno GPU SMMU
Date: Thu, 11 Jun 2020 16:21:26 -0600 [thread overview]
Message-ID: <20200611222128.28826-6-jcrouse@codeaurora.org> (raw)
In-Reply-To: <20200611222128.28826-1-jcrouse@codeaurora.org>
Add a special implementation for the SMMU attached to most Adreno GPU
target triggered from the qcom,adreno-gpu-smmu compatible string. When
selected the driver will attempt to enable split pagetables.
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
---
drivers/iommu/arm-smmu-impl.c | 3 +++
drivers/iommu/arm-smmu-qcom.c | 45 +++++++++++++++++++++++++++++++++--
drivers/iommu/arm-smmu.h | 1 +
3 files changed, 47 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c
index a20e426d81ac..309675cf6699 100644
--- a/drivers/iommu/arm-smmu-impl.c
+++ b/drivers/iommu/arm-smmu-impl.c
@@ -176,5 +176,8 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
of_device_is_compatible(np, "qcom,sc7180-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);
+
return smmu;
}
diff --git a/drivers/iommu/arm-smmu-qcom.c b/drivers/iommu/arm-smmu-qcom.c
index cf01d0215a39..6d0ab4865fc7 100644
--- a/drivers/iommu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm-smmu-qcom.c
@@ -12,6 +12,29 @@ struct qcom_smmu {
struct arm_smmu_device smmu;
};
+static bool qcom_adreno_smmu_is_gpu_device(struct arm_smmu_domain *smmu_domain)
+{
+ return of_device_is_compatible(smmu_domain->dev.of_node, "qcom,adreno");
+}
+
+static int qcom_adreno_smmu_init_context(struct arm_smmu_domain *smmu_domain,
+ struct io_pgtable_cfg *pgtbl_cfg)
+{
+ /* TTBR1 is only for the GPU stream ID and not the GMU */
+ if (!qcom_adreno_smmu_is_gpu_device(smmu_domain))
+ return 0;
+ /*
+ * All targets that use the qcom,adreno-smmu compatible string *should*
+ * be AARCH64 stage 1 but double check because the arm-smmu code assumes
+ * that is the case when the TTBR1 quirk is enabled
+ */
+ if ((smmu_domain->stage == ARM_SMMU_DOMAIN_S1) &&
+ (smmu_domain->cfg.fmt == ARM_SMMU_CTX_FMT_AARCH64))
+ pgtbl_cfg->quirks |= IO_PGTABLE_QUIRK_ARM_TTBR1;
+
+ return 0;
+}
+
static const struct of_device_id qcom_smmu_client_of_match[] = {
{ .compatible = "qcom,adreno" },
{ .compatible = "qcom,mdp4" },
@@ -65,7 +88,15 @@ static const struct arm_smmu_impl qcom_smmu_impl = {
.reset = qcom_smmu500_reset,
};
-struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
+static const struct arm_smmu_impl qcom_adreno_smmu_impl = {
+ .init_context = qcom_adreno_smmu_init_context,
+ .def_domain_type = qcom_smmu_def_domain_type,
+ .reset = qcom_smmu500_reset,
+};
+
+
+static struct arm_smmu_device *qcom_smmu_create(struct arm_smmu_device *smmu,
+ const struct arm_smmu_impl *impl)
{
struct qcom_smmu *qsmmu;
@@ -75,8 +106,18 @@ struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
qsmmu->smmu = *smmu;
- qsmmu->smmu.impl = &qcom_smmu_impl;
+ qsmmu->smmu.impl = impl;
devm_kfree(smmu->dev, smmu);
return &qsmmu->smmu;
}
+
+struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
+{
+ return qcom_smmu_create(smmu, &qcom_smmu_impl);
+}
+
+struct arm_smmu_device *qcom_adreno_smmu_impl_init(struct arm_smmu_device *smmu)
+{
+ return qcom_smmu_create(smmu, &qcom_adreno_smmu_impl);
+}
diff --git a/drivers/iommu/arm-smmu.h b/drivers/iommu/arm-smmu.h
index d33cfe26b2f5..c417814f1d98 100644
--- a/drivers/iommu/arm-smmu.h
+++ b/drivers/iommu/arm-smmu.h
@@ -466,6 +466,7 @@ 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 *qcom_smmu_impl_init(struct arm_smmu_device *smmu);
+struct arm_smmu_device *qcom_adreno_smmu_impl_init(struct arm_smmu_device *smmu);
int arm_mmu500_reset(struct arm_smmu_device *smmu);
--
2.17.1
next prev parent reply other threads:[~2020-06-11 22:22 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-11 22:21 [PATCH v8 0/7] iommu/arm-smmu: Enable split pagetable support Jordan Crouse
2020-06-11 22:21 ` [PATCH v8 1/7] iommu/arm-smmu: Pass io-pgtable config to implementation specific function Jordan Crouse
2020-06-11 22:21 ` [PATCH v8 2/7] iommu/arm-smmu: Add support for split pagetables Jordan Crouse
2020-06-11 22:21 ` [PATCH v8 3/7] dt-bindings: arm-smmu: Add compatible string for Adreno GPU SMMU Jordan Crouse
2020-06-17 22:40 ` Rob Herring
2020-06-11 22:21 ` [PATCH v8 4/7] iommu/arm-smmu: Add a pointer to the attached device to smmu_domain Jordan Crouse
2020-06-12 4:19 ` kernel test robot
2020-06-11 22:21 ` Jordan Crouse [this message]
2020-06-12 5:11 ` [PATCH v8 5/7] iommu/arm-smmu: Add implementation for the adreno GPU SMMU kernel test robot
2020-06-13 1:34 ` kernel test robot
2020-06-11 22:21 ` [PATCH v8 6/7] drm/msm: Set the global virtual address range from the IOMMU domain Jordan Crouse
2020-06-11 22:21 ` [PATCH v8 7/7] arm: dts: qcom: sm845: Set the compatible string for the GPU SMMU Jordan Crouse
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