linux-kernel - [PATCH v5 12/14] arm64: dts: apple: t8103: Add PCIe DARTs

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Message-Id: <20210929163847.2807812-13-maz@kernel.org>
Date:   Wed, 29 Sep 2021 17:38:45 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Stan Skowronek <stan@...ellium.com>,
        Mark Kettenis <kettenis@...nbsd.org>,
        Sven Peter <sven@...npeter.dev>,
        Hector Martin <marcan@...can.st>,
        Robin Murphy <Robin.Murphy@....com>,
        Joey Gouly <joey.gouly@....com>,
        Joerg Roedel <joro@...tes.org>, kernel-team@...roid.com
Subject: [PATCH v5 12/14] arm64: dts: apple: t8103: Add PCIe DARTs

PCIe on the Apple M1 (aka t8103) requires the use of IOMMUs (aka
DARTs). Add the three instances that deal with the internal PCIe
ports and route each port's traffic through its DART.

Signed-off-by: Marc Zyngier <maz@...nel.org>
---
 arch/arm64/boot/dts/apple/t8103.dtsi | 30 ++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm64/boot/dts/apple/t8103.dtsi b/arch/arm64/boot/dts/apple/t8103.dtsi
index 10956859b4bb..2eae6752375f 100644
--- a/arch/arm64/boot/dts/apple/t8103.dtsi
+++ b/arch/arm64/boot/dts/apple/t8103.dtsi
@@ -215,6 +215,30 @@ pinctrl_smc: pinctrl@...820000 {
 				     <AIC_IRQ 397 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
+		pcie0_dart_0: dart@...008000 {
+			compatible = "apple,t8103-dart";
+			reg = <0x6 0x81008000 0x0 0x4000>;
+			#iommu-cells = <1>;
+			interrupt-parent = <&aic>;
+			interrupts = <AIC_IRQ 696 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
+		pcie0_dart_1: dart@...008000 {
+			compatible = "apple,t8103-dart";
+			reg = <0x6 0x82008000 0x0 0x4000>;
+			#iommu-cells = <1>;
+			interrupt-parent = <&aic>;
+			interrupts = <AIC_IRQ 699 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
+		pcie0_dart_2: dart@...008000 {
+			compatible = "apple,t8103-dart";
+			reg = <0x6 0x83008000 0x0 0x4000>;
+			#iommu-cells = <1>;
+			interrupt-parent = <&aic>;
+			interrupts = <AIC_IRQ 702 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
 		pcie0: pcie@...000000 {
 			compatible = "apple,t8103-pcie", "apple,pcie";
 			device_type = "pci";
@@ -235,6 +259,12 @@ pcie0: pcie@...000000 {
 			msi-parent = <&pcie0>;
 			msi-ranges = <&aic AIC_IRQ 704 IRQ_TYPE_EDGE_RISING 32>;
 
+
+			iommu-map = <0x100 &pcie0_dart_0 1 1>,
+				    <0x200 &pcie0_dart_1 1 1>,
+				    <0x300 &pcie0_dart_2 1 1>;
+			iommu-map-mask = <0xff00>;
+
 			bus-range = <0 3>;
 			#address-cells = <3>;
 			#size-cells = <2>;
-- 
2.30.2