diff mbox series

[v5,12/14] arm64: dts: apple: t8103: Add PCIe DARTs

Message ID 20210929163847.2807812-13-maz@kernel.org (mailing list archive)
State Not Applicable
Delegated to: Lorenzo Pieralisi
Headers show
Series PCI: Add support for Apple M1 | expand

Commit Message

Marc Zyngier Sept. 29, 2021, 4:38 p.m. UTC 
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@kernel.org>
---
 arch/arm64/boot/dts/apple/t8103.dtsi | 30 ++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

Comments

Hector Martin Oct. 7, 2021, 4:02 p.m. UTC | #1 
On 30/09/2021 01.38, Marc Zyngier wrote:
> 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@kernel.org>
> ---
>   arch/arm64/boot/dts/apple/t8103.dtsi | 30 ++++++++++++++++++++++++++++
>   1 file changed, 30 insertions(+)
> 

Acked-by: Hector Martin <marcan@marcan.st>
diff mbox series

Patch

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@23e820000 {
 				     <AIC_IRQ 397 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
+		pcie0_dart_0: dart@681008000 {
+			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@682008000 {
+			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@683008000 {
+			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@690000000 {
 			compatible = "apple,t8103-pcie", "apple,pcie";
 			device_type = "pci";
@@ -235,6 +259,12 @@  pcie0: pcie@690000000 {
 			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>;