From: Rob Clark <robdclark@gmail.com>
To: iommu@lists.linux-foundation.org
Cc: freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org,
Rob Clark <robdclark@chromium.org>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Joerg Roedel <joro@8bytes.org>,
Konrad Dybcio <konrad.dybcio@linaro.org>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
Bjorn Andersson <quic_bjorande@quicinc.com>,
Elliot Berman <quic_eberman@quicinc.com>,
Richard Acayan <mailingradian@gmail.com>,
Manivannan Sadhasivam <mani@kernel.org>,
linux-arm-kernel@lists.infradead.org (moderated list:ARM SMMU
DRIVERS), iommu@lists.linux.dev (open list:IOMMU SUBSYSTEM),
linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] iommu/arm-smmu-qcom: Add missing GMU entry to match table
Date: Thu, 7 Dec 2023 13:24:39 -0800 [thread overview]
Message-ID: <20231207212441.6199-1-robdclark@gmail.com> (raw)
From: Rob Clark <robdclark@chromium.org>
We also want the default domain for the GMU to be an identy domain,
so it does not get a context bank assigned. Without this, both
of_dma_configure() and drm/msm's iommu_domain_attach() will trigger
allocating and configuring a context bank. So GMU ends up attached
to both cbndx 1 and cbndx 2. This arrangement seemingly confounds
and surprises the firmware if the GPU later triggers a translation
fault, resulting (on sc8280xp / lenovo x13s, at least) in the SMMU
getting wedged and the GPU stuck without memory access.
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index 549ae4dba3a6..d326fa230b96 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -243,6 +243,7 @@ static int qcom_adreno_smmu_init_context(struct arm_smmu_domain *smmu_domain,
static const struct of_device_id qcom_smmu_client_of_match[] __maybe_unused = {
{ .compatible = "qcom,adreno" },
+ { .compatible = "qcom,adreno-gmu" },
{ .compatible = "qcom,mdp4" },
{ .compatible = "qcom,mdss" },
{ .compatible = "qcom,sc7180-mdss" },
--
2.43.0
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next reply other threads:[~2023-12-07 21:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-07 21:24 Rob Clark [this message]
2023-12-08 8:19 ` [PATCH] iommu/arm-smmu-qcom: Add missing GMU entry to match table Johan Hovold
2023-12-08 11:49 ` Robin Murphy
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