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Message-ID: <281a46c1-ce2a-4986-8562-878c7267efd0@quicinc.com>
Date: Mon, 18 Dec 2023 17:10:33 +0530
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Subject: Re: [PATCH v4 3/5] iommu/arm-smmu: add ACTLR data and support for
 SM8550
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To: Konrad Dybcio <konrad.dybcio@linaro.org>, <will@kernel.org>,
        <robin.murphy@arm.com>, <joro@8bytes.org>,
        <dmitry.baryshkov@linaro.org>, <jsnitsel@redhat.com>,
        <quic_bjorande@quicinc.com>, <mani@kernel.org>,
        <quic_eberman@quicinc.com>, <robdclark@chromium.org>,
        <u.kleine-koenig@pengutronix.de>, <robh@kernel.org>,
        <vladimir.oltean@nxp.com>, <quic_pkondeti@quicinc.com>,
        <quic_molvera@quicinc.com>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski@linaro.org>
CC: <linux-arm-msm@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>,
        <iommu@lists.linux.dev>, <linux-kernel@vger.kernel.org>,
        <qipl.kernel.upstream@quicinc.com>
References: <20231215101827.30549-1-quic_bibekkum@quicinc.com>
 <20231215101827.30549-4-quic_bibekkum@quicinc.com>
 <e4329952-34ac-4458-a63c-1f64e288614c@linaro.org>
From: Bibek Kumar Patro <quic_bibekkum@quicinc.com>
In-Reply-To: <e4329952-34ac-4458-a63c-1f64e288614c@linaro.org>
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On 12/16/2023 5:05 AM, Konrad Dybcio wrote:
> On 15.12.2023 11:18, Bibek Kumar Patro wrote:
>> Add ACTLR data table for SM8550 along with support for
>> same including SM8550 specific implementation operations.
>>
>> Signed-off-by: Bibek Kumar Patro <quic_bibekkum@quicinc.com>
>> ---
> [...]
> 
>> +static const struct qcom_smmu_match_data sm8550_smmu_500_impl0_data = {
>> +	.impl = &qcom_smmu_500_impl,
>> +	.adreno_impl = &qcom_adreno_smmu_500_impl,
>> +	.cfg = &qcom_smmu_impl0_cfg,
>> +	.actlrcfg = sm8550_apps_actlr_cfg,
>> +	.actlrcfg_gfx = sm8550_gfx_actlr_cfg,
> There are platforms that feature more than just APPS and Adreno SMMUs,
> this implementation seems to assume there's only these two :/
> 

Yes, some platforms can feature additional SMMUs as well including APPS 
and Adreno. In that case there would be a corresponding compatible 
string and an additional field in qcom_smmu_match_data might be needed.

Thanks,
Bibek

> I suppose the only way to solve this would be to introduce new compatibles
> for each one of them.. Krzysztof, do you think that's reasonable? E.g.
> MSM8996 has at least 5 instances, 8998 has at least 4 etc.
> 
> Konrad