linux-kernel - [PATCH v1 1/2] arm64: dts: qcom: sa8775p: Adding iommus property in pcie DT nodes

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Date: Tue, 30 Apr 2024 22:01:50 +0530
From: Mrinmay Sarkar <quic_msarkar@...cinc.com>
To: andersson@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, konrad.dybcio@...aro.org,
        manivannan.sadhasivam@...aro.org
Cc: quic_shazhuss@...cinc.com, quic_nitegupt@...cinc.com,
        quic_ramkri@...cinc.com, quic_nayiluri@...cinc.com,
        quic_krichai@...cinc.com, quic_vbadigan@...cinc.com,
        quic_schintav@...cinc.com, Mrinmay Sarkar <quic_msarkar@...cinc.com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1 1/2] arm64: dts: qcom: sa8775p: Adding iommus property in pcie DT nodes

'iommus' is a list of phandle and IOMMU specifier pairs that describe
the IOMMU master interfaces of the device. Specified this property in
PCIe DT nodes so that IOMMU can be used for address translation.

Signed-off-by: Mrinmay Sarkar <quic_msarkar@...cinc.com>
---
 arch/arm64/boot/dts/qcom/sa8775p.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sa8775p.dtsi b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
index 9065645..0c52180 100644
--- a/arch/arm64/boot/dts/qcom/sa8775p.dtsi
+++ b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
@@ -3666,6 +3666,7 @@
 				<&gem_noc MASTER_APPSS_PROC 0 &config_noc SLAVE_PCIE_0 0>;
 		interconnect-names = "pcie-mem", "cpu-pcie";
 
+		iommus = <&pcie_smmu 0x0000 0x7f>;
 		iommu-map = <0x0 &pcie_smmu 0x0000 0x1>,
 			    <0x100 &pcie_smmu 0x0001 0x1>;
 
@@ -3822,6 +3823,7 @@
 				<&gem_noc MASTER_APPSS_PROC 0 &config_noc SLAVE_PCIE_1 0>;
 		interconnect-names = "pcie-mem", "cpu-pcie";
 
+		iommus = <&pcie_smmu 0x0080 0x7f>;
 		iommu-map = <0x0 &pcie_smmu 0x0080 0x1>,
 			    <0x100 &pcie_smmu 0x0081 0x1>;
 
-- 
2.7.4