2023-05-09 16:47:00

by Rob Clark

Subject: [PATCH 1/2] iommu/arm-smmu-qcom: Fix missing adreno_smmu's

From: Rob Clark <[email protected]>

When the special handling of qcom,adreno-smmu was moved into
qcom_smmu_create(), it was overlooked that we didn't have all the
required entries in qcom_smmu_impl_of_match. So we stopped getting
adreno_smmu_priv on sc7180, breaking per-process pgtables.

Fixes: 30b912a03d91 ("iommu/arm-smmu-qcom: Move the qcom,adreno-smmu check into qcom_smmu_create")
Suggested-by: Lepton Wu <[email protected]>
Signed-off-by: Rob Clark <[email protected]>
---
drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index d1b296b95c86..760d9c43dbd2 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -496,20 +496,21 @@ static const struct qcom_smmu_match_data qcom_smmu_500_impl0_data = {
/*
* Do not add any more qcom,SOC-smmu-500 entries to this list, unless they need
* special handling and can not be covered by the qcom,smmu-500 entry.
*/
static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
{ .compatible = "qcom,msm8996-smmu-v2", .data = &msm8996_smmu_data },
{ .compatible = "qcom,msm8998-smmu-v2", .data = &qcom_smmu_v2_data },
{ .compatible = "qcom,qcm2290-smmu-500", .data = &qcom_smmu_500_impl0_data },
{ .compatible = "qcom,qdu1000-smmu-500", .data = &qcom_smmu_500_impl0_data },
{ .compatible = "qcom,sc7180-smmu-500", .data = &qcom_smmu_500_impl0_data },
+ { .compatible = "qcom,sc7180-smmu-v2", .data = &qcom_smmu_v2_data },
{ .compatible = "qcom,sc7280-smmu-500", .data = &qcom_smmu_500_impl0_data },
{ .compatible = "qcom,sc8180x-smmu-500", .data = &qcom_smmu_500_impl0_data },
{ .compatible = "qcom,sc8280xp-smmu-500", .data = &qcom_smmu_500_impl0_data },
{ .compatible = "qcom,sdm630-smmu-v2", .data = &qcom_smmu_v2_data },
{ .compatible = "qcom,sdm845-smmu-v2", .data = &qcom_smmu_v2_data },
{ .compatible = "qcom,sdm845-smmu-500", .data = &sdm845_smmu_500_data },
{ .compatible = "qcom,sm6115-smmu-500", .data = &qcom_smmu_500_impl0_data},
{ .compatible = "qcom,sm6125-smmu-500", .data = &qcom_smmu_500_impl0_data },
{ .compatible = "qcom,sm6350-smmu-v2", .data = &qcom_smmu_v2_data },
{ .compatible = "qcom,sm6350-smmu-500", .data = &qcom_smmu_500_impl0_data },
@@ -540,12 +541,14 @@ struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
/* Match platform for ACPI boot */
if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)
return qcom_smmu_create(smmu, &qcom_smmu_500_impl0_data);
}
#endif

match = of_match_node(qcom_smmu_impl_of_match, np);
if (match)
return qcom_smmu_create(smmu, match->data);

+ WARN_ON(of_device_is_compatible(np, "qcom,adreno-smmu"));
+
return smmu;
}
--
2.40.1

2023-05-11 14:35:30

by Rob Clark

Subject: Re: [PATCH 1/2] iommu/arm-smmu-qcom: Fix missing adreno_smmu's

On Tue, May 9, 2023 at 9:37 AM Rob Clark <[email protected]> wrote:
>
> From: Rob Clark <[email protected]>
>
> When the special handling of qcom,adreno-smmu was moved into
> qcom_smmu_create(), it was overlooked that we didn't have all the
> required entries in qcom_smmu_impl_of_match. So we stopped getting
> adreno_smmu_priv on sc7180, breaking per-process pgtables.
>
> Fixes: 30b912a03d91 ("iommu/arm-smmu-qcom: Move the qcom,adreno-smmu check into qcom_smmu_create")
> Suggested-by: Lepton Wu <[email protected]>
> Signed-off-by: Rob Clark <[email protected]>

Any chance I could get an ack for landing this fix via msm-fixes?
Broken per-process pgtables is kind of a serious regression..

BR,
-R

> ---
> drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> index d1b296b95c86..760d9c43dbd2 100644
> --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> @@ -496,20 +496,21 @@ static const struct qcom_smmu_match_data qcom_smmu_500_impl0_data = {
> /*
> * Do not add any more qcom,SOC-smmu-500 entries to this list, unless they need
> * special handling and can not be covered by the qcom,smmu-500 entry.
> */
> static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
> { .compatible = "qcom,msm8996-smmu-v2", .data = &msm8996_smmu_data },
> { .compatible = "qcom,msm8998-smmu-v2", .data = &qcom_smmu_v2_data },
> { .compatible = "qcom,qcm2290-smmu-500", .data = &qcom_smmu_500_impl0_data },
> { .compatible = "qcom,qdu1000-smmu-500", .data = &qcom_smmu_500_impl0_data },
> { .compatible = "qcom,sc7180-smmu-500", .data = &qcom_smmu_500_impl0_data },
> + { .compatible = "qcom,sc7180-smmu-v2", .data = &qcom_smmu_v2_data },
> { .compatible = "qcom,sc7280-smmu-500", .data = &qcom_smmu_500_impl0_data },
> { .compatible = "qcom,sc8180x-smmu-500", .data = &qcom_smmu_500_impl0_data },
> { .compatible = "qcom,sc8280xp-smmu-500", .data = &qcom_smmu_500_impl0_data },
> { .compatible = "qcom,sdm630-smmu-v2", .data = &qcom_smmu_v2_data },
> { .compatible = "qcom,sdm845-smmu-v2", .data = &qcom_smmu_v2_data },
> { .compatible = "qcom,sdm845-smmu-500", .data = &sdm845_smmu_500_data },
> { .compatible = "qcom,sm6115-smmu-500", .data = &qcom_smmu_500_impl0_data},
> { .compatible = "qcom,sm6125-smmu-500", .data = &qcom_smmu_500_impl0_data },
> { .compatible = "qcom,sm6350-smmu-v2", .data = &qcom_smmu_v2_data },
> { .compatible = "qcom,sm6350-smmu-500", .data = &qcom_smmu_500_impl0_data },
> @@ -540,12 +541,14 @@ struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
> /* Match platform for ACPI boot */
> if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)
> return qcom_smmu_create(smmu, &qcom_smmu_500_impl0_data);
> }
> #endif
>
> match = of_match_node(qcom_smmu_impl_of_match, np);
> if (match)
> return qcom_smmu_create(smmu, match->data);
>
> + WARN_ON(of_device_is_compatible(np, "qcom,adreno-smmu"));
> +
> return smmu;
> }
> --
> 2.40.1
>

2023-05-11 14:55:19

by Dmitry Baryshkov

Subject: Re: [PATCH 1/2] iommu/arm-smmu-qcom: Fix missing adreno_smmu's

On Tue, 9 May 2023 at 19:37, Rob Clark <[email protected]> wrote:
>
> From: Rob Clark <[email protected]>
>
> When the special handling of qcom,adreno-smmu was moved into
> qcom_smmu_create(), it was overlooked that we didn't have all the
> required entries in qcom_smmu_impl_of_match. So we stopped getting
> adreno_smmu_priv on sc7180, breaking per-process pgtables.
>
> Fixes: 30b912a03d91 ("iommu/arm-smmu-qcom: Move the qcom,adreno-smmu check into qcom_smmu_create")
> Suggested-by: Lepton Wu <[email protected]>
> Signed-off-by: Rob Clark <[email protected]>
> ---
> drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> index d1b296b95c86..760d9c43dbd2 100644
> --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> @@ -496,20 +496,21 @@ static const struct qcom_smmu_match_data qcom_smmu_500_impl0_data = {
> /*
> * Do not add any more qcom,SOC-smmu-500 entries to this list, unless they need
> * special handling and can not be covered by the qcom,smmu-500 entry.
> */
> static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
> { .compatible = "qcom,msm8996-smmu-v2", .data = &msm8996_smmu_data },
> { .compatible = "qcom,msm8998-smmu-v2", .data = &qcom_smmu_v2_data },
> { .compatible = "qcom,qcm2290-smmu-500", .data = &qcom_smmu_500_impl0_data },
> { .compatible = "qcom,qdu1000-smmu-500", .data = &qcom_smmu_500_impl0_data },
> { .compatible = "qcom,sc7180-smmu-500", .data = &qcom_smmu_500_impl0_data },
> + { .compatible = "qcom,sc7180-smmu-v2", .data = &qcom_smmu_v2_data },
> { .compatible = "qcom,sc7280-smmu-500", .data = &qcom_smmu_500_impl0_data },
> { .compatible = "qcom,sc8180x-smmu-500", .data = &qcom_smmu_500_impl0_data },
> { .compatible = "qcom,sc8280xp-smmu-500", .data = &qcom_smmu_500_impl0_data },
> { .compatible = "qcom,sdm630-smmu-v2", .data = &qcom_smmu_v2_data },
> { .compatible = "qcom,sdm845-smmu-v2", .data = &qcom_smmu_v2_data },
> { .compatible = "qcom,sdm845-smmu-500", .data = &sdm845_smmu_500_data },
> { .compatible = "qcom,sm6115-smmu-500", .data = &qcom_smmu_500_impl0_data},
> { .compatible = "qcom,sm6125-smmu-500", .data = &qcom_smmu_500_impl0_data },
> { .compatible = "qcom,sm6350-smmu-v2", .data = &qcom_smmu_v2_data },
> { .compatible = "qcom,sm6350-smmu-500", .data = &qcom_smmu_500_impl0_data },
> @@ -540,12 +541,14 @@ struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
> /* Match platform for ACPI boot */
> if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)
> return qcom_smmu_create(smmu, &qcom_smmu_500_impl0_data);
> }
> #endif
>
> match = of_match_node(qcom_smmu_impl_of_match, np);
> if (match)
> return qcom_smmu_create(smmu, match->data);
>
> + WARN_ON(of_device_is_compatible(np, "qcom,adreno-smmu"));

Could you please add a comment here, noting the reason? Or maybe we
should change that to:
if (WARN_ON(...))
return ERR_PTR(-EINVAL);

> +
> return smmu;
> }
> --
> 2.40.1
>


--
With best wishes
Dmitry

2023-05-11 15:28:31

by Rob Clark

Subject: Re: [PATCH 1/2] iommu/arm-smmu-qcom: Fix missing adreno_smmu's

On Thu, May 11, 2023 at 7:51 AM Dmitry Baryshkov
<[email protected]> wrote:
>
> On Tue, 9 May 2023 at 19:37, Rob Clark <[email protected]> wrote:
> >
> > From: Rob Clark <[email protected]>
> >
> > When the special handling of qcom,adreno-smmu was moved into
> > qcom_smmu_create(), it was overlooked that we didn't have all the
> > required entries in qcom_smmu_impl_of_match. So we stopped getting
> > adreno_smmu_priv on sc7180, breaking per-process pgtables.
> >
> > Fixes: 30b912a03d91 ("iommu/arm-smmu-qcom: Move the qcom,adreno-smmu check into qcom_smmu_create")
> > Suggested-by: Lepton Wu <[email protected]>
> > Signed-off-by: Rob Clark <[email protected]>
> > ---
> > drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 3 +++
> > 1 file changed, 3 insertions(+)
> >
> > diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> > index d1b296b95c86..760d9c43dbd2 100644
> > --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> > +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> > @@ -496,20 +496,21 @@ static const struct qcom_smmu_match_data qcom_smmu_500_impl0_data = {
> > /*
> > * Do not add any more qcom,SOC-smmu-500 entries to this list, unless they need
> > * special handling and can not be covered by the qcom,smmu-500 entry.
> > */
> > static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
> > { .compatible = "qcom,msm8996-smmu-v2", .data = &msm8996_smmu_data },
> > { .compatible = "qcom,msm8998-smmu-v2", .data = &qcom_smmu_v2_data },
> > { .compatible = "qcom,qcm2290-smmu-500", .data = &qcom_smmu_500_impl0_data },
> > { .compatible = "qcom,qdu1000-smmu-500", .data = &qcom_smmu_500_impl0_data },
> > { .compatible = "qcom,sc7180-smmu-500", .data = &qcom_smmu_500_impl0_data },
> > + { .compatible = "qcom,sc7180-smmu-v2", .data = &qcom_smmu_v2_data },
> > { .compatible = "qcom,sc7280-smmu-500", .data = &qcom_smmu_500_impl0_data },
> > { .compatible = "qcom,sc8180x-smmu-500", .data = &qcom_smmu_500_impl0_data },
> > { .compatible = "qcom,sc8280xp-smmu-500", .data = &qcom_smmu_500_impl0_data },
> > { .compatible = "qcom,sdm630-smmu-v2", .data = &qcom_smmu_v2_data },
> > { .compatible = "qcom,sdm845-smmu-v2", .data = &qcom_smmu_v2_data },
> > { .compatible = "qcom,sdm845-smmu-500", .data = &sdm845_smmu_500_data },
> > { .compatible = "qcom,sm6115-smmu-500", .data = &qcom_smmu_500_impl0_data},
> > { .compatible = "qcom,sm6125-smmu-500", .data = &qcom_smmu_500_impl0_data },
> > { .compatible = "qcom,sm6350-smmu-v2", .data = &qcom_smmu_v2_data },
> > { .compatible = "qcom,sm6350-smmu-500", .data = &qcom_smmu_500_impl0_data },
> > @@ -540,12 +541,14 @@ struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
> > /* Match platform for ACPI boot */
> > if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)
> > return qcom_smmu_create(smmu, &qcom_smmu_500_impl0_data);
> > }
> > #endif
> >
> > match = of_match_node(qcom_smmu_impl_of_match, np);
> > if (match)
> > return qcom_smmu_create(smmu, match->data);
> >
> > + WARN_ON(of_device_is_compatible(np, "qcom,adreno-smmu"));
>
> Could you please add a comment here, noting the reason? Or maybe we
> should change that to:
> if (WARN_ON(...))
> return ERR_PTR(-EINVAL);

I'll add a comment. Not having an iommu is even worse, so returning
an error isn't a good idea. I just wanted to leave some breadcrumbs
so people can see where the problem actually is if per-process
pgtables break again.

BR,
-R

>
> > +
> > return smmu;
> > }
> > --
> > 2.40.1
> >
>
>
> --
> With best wishes
> Dmitry