linux-kernel - Re: [PATCH v16 5/5] iommu/arm-smmu: add ACTLR data and support for qcom_smmu

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Message-ID: <1e495126-e398-42fb-b53c-99a07a0e8320@quicinc.com>
Date: Tue, 29 Oct 2024 18:10:30 +0530
From: Bibek Kumar Patro <quic_bibekkum@...cinc.com>
To: Rob Clark <robdclark@...il.com>
CC: <will@...nel.org>, <robin.murphy@....com>, <joro@...tes.org>,
        <jgg@...pe.ca>, <jsnitsel@...hat.com>, <robh@...nel.org>,
        <krzysztof.kozlowski@...aro.org>, <quic_c_gdjako@...cinc.com>,
        <dmitry.baryshkov@...aro.org>, <iommu@...ts.linux.dev>,
        <linux-arm-msm@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v16 5/5] iommu/arm-smmu: add ACTLR data and support for
 qcom_smmu_500



On 10/29/2024 2:46 AM, Rob Clark wrote:
> On Tue, Oct 8, 2024 at 5:55 AM Bibek Kumar Patro
> <quic_bibekkum@...cinc.com> wrote:
>>
>> Add ACTLR data table for qcom_smmu_500 including
>> corresponding data entry and set prefetch value by
>> way of a list of compatible strings.
>>
>> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
>> Signed-off-by: Bibek Kumar Patro <quic_bibekkum@...cinc.com>
>> ---
>>   drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 24 ++++++++++++++++++++++
>>   1 file changed, 24 insertions(+)
>>
>> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> index 2d2c1e75632c..dd4fb883ebcd 100644
>> --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> @@ -25,8 +25,31 @@
>>
>>   #define CPRE                   (1 << 1)
>>   #define CMTLB                  (1 << 0)
>> +#define PREFETCH_SHIFT         8
>> +#define PREFETCH_DEFAULT       0
>> +#define PREFETCH_SHALLOW       (1 << PREFETCH_SHIFT)
>> +#define PREFETCH_MODERATE      (2 << PREFETCH_SHIFT)
>> +#define PREFETCH_DEEP          (3 << PREFETCH_SHIFT)
>>   #define GFX_ACTLR_PRR          (1 << 5)
>>
>> +static const struct of_device_id qcom_smmu_actlr_client_of_match[] = {
>> +       { .compatible = "qcom,adreno",
>> +                       .data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
>> +       { .compatible = "qcom,adreno-gmu",
>> +                       .data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
>> +       { .compatible = "qcom,adreno-smmu",
>> +                       .data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
>> +       { .compatible = "qcom,fastrpc",
>> +                       .data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
>> +       { .compatible = "qcom,sc7280-mdss",
>> +                       .data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
>> +       { .compatible = "qcom,sc7280-venus",
>> +                       .data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
>> +       { .compatible = "qcom,sm8550-mdss",
>> +                       .data = (const void *) (PREFETCH_DEFAULT | CMTLB) },
>> +       { }
>> +};
> 
> I guess by now there are some more entries to add
> ("qcom,x1e80100-mdss", for example), but I guess those could be
> followup patches
> 
> Reviewed-by: Rob Clark <robdclark@...il.com>
> 

Thanks everyone for valuable inputs, reviews and ack.

regards,
Bibek

>> +
>>   static struct qcom_smmu *to_qcom_smmu(struct arm_smmu_device *smmu)
>>   {
>>          return container_of(smmu, struct qcom_smmu, smmu);
>> @@ -640,6 +663,7 @@ static const struct qcom_smmu_match_data qcom_smmu_500_impl0_data = {
>>          .impl = &qcom_smmu_500_impl,
>>          .adreno_impl = &qcom_adreno_smmu_500_impl,
>>          .cfg = &qcom_smmu_impl0_cfg,
>> +       .client_match = qcom_smmu_actlr_client_of_match,
>>   };
>>
>>   /*
>> --
>> 2.34.1
>>