linux-kernel - Re: [PATCH v2] arm64: dts: qcom: sa8775p: Update iommu-map entry

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Message-ID: <70c2e4c0-aa5a-4d61-9b12-ee7cc5106ead@quicinc.com>
Date: Tue, 8 Oct 2024 17:55:27 +0530
From: Subramanian Ananthanarayanan <quic_skananth@...cinc.com>
To: <andersson@...nel.org>, <krzk+dt@...nel.org>
CC: <quic_krichai@...cinc.com>, <quic_vbadigan@...cinc.com>,
        Konrad Dybcio
	<konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        "open list:ARM/QUALCOMM SUPPORT"
	<linux-arm-msm@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED
 DEVICE TREE BINDINGS" <devicetree@...r.kernel.org>,
        open list
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] arm64: dts: qcom: sa8775p: Update iommu-map entry


On 10/8/2024 5:47 PM, Subramanian Ananthanarayanan wrote:
> SA8775P has only support for SMMU v2, due to this PCIe has limited
> SID entries to enable dynamic IOMMU mapping in the driver, hence
> we are updating static entries.
>
> iommu-map entries are added to support more PCIe device like switch
> attach, SRIOV capable devices. These entries are specific to this
> board as topology of PCIe devices can vary based on the end usecase
> connected via PCIe. For other board files, these entries may
> not be directly applicable.
>
> Signed-off-by: Subramanian Ananthanarayanan <quic_skananth@...cinc.com>
> ---
> Changes in V2:
> 	- Updated commit message.

forgot to add link to v1 : 
https://lore.kernel.org/lkml/20241001114601.1097618-1-quic_skananth@quicinc.com/

-Subramanian

> ---
> ---
>   arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi | 62 ++++++++++++++++++++++
>   1 file changed, 62 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi b/arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi
> index 0c1b21def4b6..05c9f572ae42 100644
> --- a/arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sa8775p-ride.dtsi
> @@ -675,6 +675,37 @@ &pcie0 {
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&pcie0_default_state>;
>   
> +	iommu-map = <0x0 &pcie_smmu 0x0000 0x1>,
> +		    <0x100 &pcie_smmu 0x0001 0x1>,
> +		    <0x101 &pcie_smmu 0x0002 0x1>,
> +		    <0x208 &pcie_smmu 0x0003 0x1>,
> +		    <0x210 &pcie_smmu 0x0004 0x1>,
> +		    <0x218 &pcie_smmu 0x0005 0x1>,
> +		    <0x280 &pcie_smmu 0x0006 0x1>,
> +		    <0x281 &pcie_smmu 0x0007 0x1>,
> +		    <0x282 &pcie_smmu 0x0008 0x1>,
> +		    <0x283 &pcie_smmu 0x0009 0x1>,
> +		    <0x284 &pcie_smmu 0x000a 0x1>,
> +		    <0x285 &pcie_smmu 0x000b 0x1>,
> +		    <0x286 &pcie_smmu 0x000c 0x1>,
> +		    <0x287 &pcie_smmu 0x000d 0x1>,
> +		    <0x288 &pcie_smmu 0x000e 0x1>,
> +		    <0x289 &pcie_smmu 0x000f 0x1>,
> +		    <0x28a &pcie_smmu 0x0010 0x1>,
> +		    <0x28b &pcie_smmu 0x0011 0x1>,
> +		    <0x28c &pcie_smmu 0x0012 0x1>,
> +		    <0x28d &pcie_smmu 0x0013 0x1>,
> +		    <0x28e &pcie_smmu 0x0014 0x1>,
> +		    <0x28f &pcie_smmu 0x0015 0x1>,
> +		    <0x290 &pcie_smmu 0x0016 0x1>,
> +		    <0x291 &pcie_smmu 0x0017 0x1>,
> +		    <0x292 &pcie_smmu 0x0018 0x1>,
> +		    <0x293 &pcie_smmu 0x0019 0x1>,
> +		    <0x300 &pcie_smmu 0x001a 0x1>,
> +		    <0x400 &pcie_smmu 0x001b 0x1>,
> +		    <0x500 &pcie_smmu 0x001c 0x1>,
> +		    <0x501 &pcie_smmu 0x001d 0x1>;
> +
>   	status = "okay";
>   };
>   
> @@ -685,6 +716,37 @@ &pcie1 {
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&pcie1_default_state>;
>   
> +	iommu-map = <0x0 &pcie_smmu 0x0080 0x1>,
> +		    <0x100 &pcie_smmu 0x0081 0x1>,
> +		    <0x101 &pcie_smmu 0x0082 0x1>,
> +		    <0x208 &pcie_smmu 0x0083 0x1>,
> +		    <0x210 &pcie_smmu 0x0084 0x1>,
> +		    <0x218 &pcie_smmu 0x0085 0x1>,
> +		    <0x280 &pcie_smmu 0x0086 0x1>,
> +		    <0x281 &pcie_smmu 0x0087 0x1>,
> +		    <0x282 &pcie_smmu 0x0088 0x1>,
> +		    <0x283 &pcie_smmu 0x0089 0x1>,
> +		    <0x284 &pcie_smmu 0x008a 0x1>,
> +		    <0x285 &pcie_smmu 0x008b 0x1>,
> +		    <0x286 &pcie_smmu 0x008c 0x1>,
> +		    <0x287 &pcie_smmu 0x008d 0x1>,
> +		    <0x288 &pcie_smmu 0x008e 0x1>,
> +		    <0x289 &pcie_smmu 0x008f 0x1>,
> +		    <0x28a &pcie_smmu 0x0090 0x1>,
> +		    <0x28b &pcie_smmu 0x0091 0x1>,
> +		    <0x28c &pcie_smmu 0x0092 0x1>,
> +		    <0x28d &pcie_smmu 0x0093 0x1>,
> +		    <0x28e &pcie_smmu 0x0094 0x1>,
> +		    <0x28f &pcie_smmu 0x0095 0x1>,
> +		    <0x290 &pcie_smmu 0x0096 0x1>,
> +		    <0x291 &pcie_smmu 0x0097 0x1>,
> +		    <0x292 &pcie_smmu 0x0098 0x1>,
> +		    <0x29d &pcie_smmu 0x0099 0x1>,
> +		    <0x300 &pcie_smmu 0x009a 0x1>,
> +		    <0x400 &pcie_smmu 0x009b 0x1>,
> +		    <0x500 &pcie_smmu 0x009c 0x1>,
> +		    <0x501 &pcie_smmu 0x009d 0x1>;
> +
>   	status = "okay";
>   };
>