[PATCH v5] arm64: dts: renesas: r8a779g0: Add GICv3 ITS and update PCIe nodes

This SoC implements GIC600 with GICv3 ITS and PCIe host mode on this
SoC can use it. Add GIC ITS node into GIC node, update interrupt-map
and add msi-map into PCIe controller node.

The GIC ITS does have master interface to issue transactions to RAM.
The interface does support cacheable transactions, however, it does
not support shareable attribute, because the AXI port signals are tied
to inactive in this implementation. Therefore, add "dma-noncoherent"
DT property into the GIC ITS subnode.

The GIC redistributor does not have cacheable/shareable, therefore
add "dma-noncoherent" DT property into the GIC node.

Co-developed-by: Yoshihiro Shimoda <[email protected]>
Signed-off-by: Yoshihiro Shimoda <[email protected]>
Signed-off-by: Marek Vasut <[email protected]>
---
NOTE: This would not be possible without prior work from Shimoda-san
      https://lore.kernel.org/all/[email protected]/
---
Cc: "Krzysztof Wilczyński" <[email protected]>
Cc: Bjorn Helgaas <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Conor Dooley <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Krzysztof Kozlowski <[email protected]>
Cc: Lorenzo Pieralisi <[email protected]>
Cc: Manivannan Sadhasivam <[email protected]>
Cc: Marc Zyngier <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Yoshihiro Shimoda <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
---
V2: No change
V3: Add Co-developed-by to credit Shimoda-san
V4: No change
V5: Rebase on current next-20260807
---
 arch/arm64/boot/dts/renesas/r8a779g0.dtsi | 31 ++++++++++++++++-------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/r8a779g0.dtsi b/arch/arm64/boot/dts/renesas/r8a779g0.dtsi
index c25642a620db8..dba46499b5e9c 100644
--- a/arch/arm64/boot/dts/renesas/r8a779g0.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a779g0.dtsi
@@ -809,6 +809,7 @@ pciec0: pcie@e65d0000 {
 			resets = <&cpg 624>;
 			reset-names = "pwr";
 			max-link-speed = <4>;
+			msi-parent = <&its>;
 			num-lanes = <2>;
 			#address-cells = <3>;
 			#size-cells = <2>;
@@ -819,10 +820,10 @@ pciec0: pcie@e65d0000 {
 			dma-ranges = <0x42000000 0 0x00000000 0 0x00000000 1 0x00000000>;
 			#interrupt-cells = <1>;
 			interrupt-map-mask = <0 0 0 7>;
-			interrupt-map = <0 0 0 1 &gic GIC_SPI 449 IRQ_TYPE_LEVEL_HIGH>,
-					<0 0 0 2 &gic GIC_SPI 449 IRQ_TYPE_LEVEL_HIGH>,
-					<0 0 0 3 &gic GIC_SPI 449 IRQ_TYPE_LEVEL_HIGH>,
-					<0 0 0 4 &gic GIC_SPI 449 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-map = <0 0 0 1 &gic 0 0 GIC_SPI 449 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 2 &gic 0 0 GIC_SPI 449 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 3 &gic 0 0 GIC_SPI 449 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 4 &gic 0 0 GIC_SPI 449 IRQ_TYPE_LEVEL_HIGH>;
 			snps,enable-cdm-check;
 			status = "disabled";
 
@@ -856,6 +857,7 @@ pciec1: pcie@e65d8000 {
 			resets = <&cpg 625>;
 			reset-names = "pwr";
 			max-link-speed = <4>;
+			msi-parent = <&its>;
 			num-lanes = <2>;
 			#address-cells = <3>;
 			#size-cells = <2>;
@@ -866,10 +868,10 @@ pciec1: pcie@e65d8000 {
 			dma-ranges = <0x42000000 0 0x00000000 0 0x00000000 1 0x00000000>;
 			#interrupt-cells = <1>;
 			interrupt-map-mask = <0 0 0 7>;
-			interrupt-map = <0 0 0 1 &gic GIC_SPI 456 IRQ_TYPE_LEVEL_HIGH>,
-					<0 0 0 2 &gic GIC_SPI 456 IRQ_TYPE_LEVEL_HIGH>,
-					<0 0 0 3 &gic GIC_SPI 456 IRQ_TYPE_LEVEL_HIGH>,
-					<0 0 0 4 &gic GIC_SPI 456 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-map = <0 0 0 1 &gic 0 0 GIC_SPI 456 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 2 &gic 0 0 GIC_SPI 456 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 3 &gic 0 0 GIC_SPI 456 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 4 &gic 0 0 GIC_SPI 456 IRQ_TYPE_LEVEL_HIGH>;
 			snps,enable-cdm-check;
 			status = "disabled";
 
@@ -2148,11 +2150,22 @@ ipmmu_mm: iommu@eefc0000 {
 		gic: interrupt-controller@f1000000 {
 			compatible = "arm,gic-v3";
 			#interrupt-cells = <3>;
-			#address-cells = <0>;
+			#address-cells = <2>;
+			#size-cells = <2>;
 			interrupt-controller;
 			reg = <0x0 0xf1000000 0 0x20000>,
 			      <0x0 0xf1060000 0 0x110000>;
 			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
+			dma-noncoherent;
+
+			ranges = <0x0 0x0 0x0 0xf1000000 0x0 0x200000>;
+
+			its: msi-controller@40000 {
+				compatible = "arm,gic-v3-its";
+				reg = <0x0 0x40000 0x0 0x20000>;
+				dma-noncoherent;
+				msi-controller;
+			};
 		};
 
 		gpu: gpu@fd000000 {
-- 
2.53.0