linux-kernel - Re: [PATCH RFC 1/2] arm64: dts: qcom: msm8953: Add GPU IOMMU

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Date: Fri, 26 Jan 2024 00:24:59 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Luca Weiss <luca@...tu.xyz>, ~postmarketos/upstreaming@...ts.sr.ht,
 phone-devel@...r.kernel.org, Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Vladimir Lypak <vladimir.lypak@...il.com>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC 1/2] arm64: dts: qcom: msm8953: Add GPU IOMMU

On 25/01/2024 23:56, Luca Weiss wrote:
> From: Vladimir Lypak <vladimir.lypak@...il.com>
> 
> Add the IOMMU used for the GPU on MSM8953.
> 
> Signed-off-by: Vladimir Lypak <vladimir.lypak@...il.com>
> ---
>   arch/arm64/boot/dts/qcom/msm8953.dtsi | 31 +++++++++++++++++++++++++++++++
>   1 file changed, 31 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/msm8953.dtsi b/arch/arm64/boot/dts/qcom/msm8953.dtsi
> index dcb5c98b793c..91d083871ab0 100644
> --- a/arch/arm64/boot/dts/qcom/msm8953.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8953.dtsi
> @@ -1046,6 +1046,37 @@ mdss_dsi1_phy: phy@...6400 {
>   			};
>   		};
>   
> +		gpu_iommu: iommu@...8000 {

Nit: most of the platforms use the adreno_smmu label. But maybe the 
msm-iommu vs arm-smmu makes difference here.

Nevertheless:

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

> +			compatible = "qcom,msm8953-iommu", "qcom,msm-iommu-v2";
> +			ranges = <0 0x01c48000 0x8000>;
> +
> +			clocks = <&gcc GCC_OXILI_AHB_CLK>,
> +				 <&gcc GCC_BIMC_GFX_CLK>;
> +			clock-names = "iface", "bus";
> +
> +			power-domains = <&gcc OXILI_CX_GDSC>;
> +
> +			qcom,iommu-secure-id = <18>;
> +
> +			#address-cells = <1>;
> +			#iommu-cells = <1>;
> +			#size-cells = <1>;
> +
> +			/* gfx3d_user */
> +			iommu-ctx@0 {
> +				compatible = "qcom,msm-iommu-v2-ns";
> +				reg = <0x0000 0x1000>;
> +				interrupts = <GIC_SPI 225 IRQ_TYPE_LEVEL_HIGH>;
> +			};
> +
> +			/* gfx3d_secure */
> +			iommu-ctx@...0 {
> +				compatible = "qcom,msm-iommu-v2-sec";
> +				reg = <0x2000 0x1000>;
> +				interrupts = <GIC_SPI 233 IRQ_TYPE_LEVEL_HIGH>;
> +			};
> +		};
> +
>   		apps_iommu: iommu@...0000 {
>   			compatible = "qcom,msm8953-iommu", "qcom,msm-iommu-v1";
>   			ranges = <0 0x01e20000 0x20000>;
> 

-- 
With best wishes
Dmitry