arm64: dts: apple: t6050-k114c: describe the N1 and the GPU handoff

arch/arm64/boot/dts/apple/t6050-k114c-gpu.dtsi

@@ -0,0 +1,117 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * K114c (M5 Max, G17C) GPU, for the boot loader's GPU handoff. Everything here
+ * stays disabled: the loader checks the ADT and the live GPU firmware build,
+ * fills the GPU reservations, then enables the power states, both mailboxes and
+ * the GPU, the GPU last. A loader that refuses leaves the GPU off.
+ *
+ * Same layout as t6050-j714s-gpu-panel.dtsi; the GPU is G17C and, in the ADT,
+ * sgx and both GPU ASCs are the same as on the M5 Pro.
+ */
+
+/ {
+	aliases {
+		/* The loader finds the GPU through this alias */
+		gpu = &sgx;
+	};
+
+	reserved-memory {
+		/* Filled and enabled by the loader from the ADT */
+		gpu_fw_text: gpu-fw-text {
+			reg = <0 0 0 0>;
+			no-map;
+			status = "disabled";
+		};
+
+		gpu_fw_data: gpu-fw-data {
+			reg = <0 0 0 0>;
+			no-map;
+			status = "disabled";
+		};
+
+		uat_ttbs: uat-ttbs {
+			reg = <0 0 0 0>;
+			no-map;
+			status = "disabled";
+		};
+
+		uat_pagetables: uat-pagetables {
+			reg = <0 0 0 0>;
+			no-map;
+			status = "disabled";
+		};
+
+		uat_l2_pagetables: uat-l2-pagetables {
+			reg = <0 0 0 0>;
+			no-map;
+			status = "disabled";
+		};
+
+		uat_handoff: uat-handoff {
+			reg = <0 0 0 0>;
+			no-map;
+			status = "disabled";
+		};
+	};
+};
+
+/* The inventory ASC nodes; the mailboxes below describe the same windows. */
+/delete-node/ &gfx_asc;
+/delete-node/ &gfx1_asc;
+
+&{/soc} {
+	/*
+	 * ADT gfx-asc and gfx1-asc at their physical windows: the wrapper, the
+	 * 8-byte iop-vbar, and their second and third interrupts (send-empty,
+	 * recv-not-empty), as T8140/T8142.
+	 */
+	gfx_mbox: mailbox@2302600000 {
+		compatible = "apple,t6050-j775d-ascwrap-v6";
+		reg = <0x23 0x2600000 0x0 0x88000>,
+		      <0x23 0x2050000 0x0 0x8>;
+		reg-names = "wrapper", "iop-vbar";
+		interrupts = <AIC_IRQ 0 2797 IRQ_TYPE_LEVEL_HIGH>,
+			     <AIC_IRQ 0 2800 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "send-empty", "recv-not-empty";
+		apple,firmware-role = "GFX";
+		power-domains = <&ps_gfx>;
+		#mbox-cells = <0>;
+		status = "disabled";
+	};
+
+	gfx1_mbox: mailbox@2302e00000 {
+		compatible = "apple,t6050-j775d-ascwrap-v6";
+		reg = <0x23 0x2e00000 0x0 0x88000>,
+		      <0x23 0x2850000 0x0 0x8>;
+		reg-names = "wrapper", "iop-vbar";
+		interrupts = <AIC_IRQ 0 2801 IRQ_TYPE_LEVEL_HIGH>,
+			     <AIC_IRQ 0 2804 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "send-empty", "recv-not-empty";
+		apple,firmware-role = "GFX1";
+		power-domains = <&ps_gfx>;
+		#mbox-cells = <0>;
+		status = "disabled";
+	};
+};
+
+/* The ADT marks GPX and AFR, GFX's parents, critical. */
+&ps_gpx {
+	apple,always-on;
+};
+
+&ps_afr {
+	apple,always-on;
+};
+
+&sgx {
+	compatible = "apple,agx-g17s";
+	/* ADT sgx reg[0]; the driver maps the first 16 MiB as "sgx" */
+	reg = <0x23 0x0 0x0 0x3fdc000>;
+	reg-names = "sgx";
+	/delete-property/ interrupts;
+	mboxes = <&gfx_mbox>, <&gfx1_mbox>;
+	memory-region = <&uat_ttbs>, <&uat_pagetables>, <&uat_handoff>,
+			<&gpu_fw_data>, <&uat_l2_pagetables>, <&gpu_fw_text>;
+	memory-region-names = "ttbs", "pagetables", "handoff", "fw-data",
+			      "l2-pagetables", "fw-text";
+};

arch/arm64/boot/dts/apple/t6050-k114c.dts

@@ -22,3 +22,86 @@
 
 #define T6050_K114C
 #include "t6050-peripherals.dtsi"
+
+/ {
+	aliases {
+		/* kboot fills the N1's factory addresses from /chosen through these */
+		wifi0 = &n1_alpha;
+		bluetooth0 = &n1_beta;
+	};
+};
+
+/*
+ * PCIe port 0: the N1 (Wi-Fi and Bluetooth), laid out as on J716c: the boot
+ * loader trains the link and keeps power, clocks, the PHY and PERST; Linux owns
+ * the routing, MSI and the DART. The port stays disabled until the loader
+ * trains it.
+ */
+&pcie0 {
+	reg = <0x1c 0xb0000000 0x0 0x10000000>,
+	      <0x4 0x14000000 0x0 0x4000>,
+	      <0x4 0x10028000 0x0 0x8000>,
+	      <0x4 0x17010000 0x0 0x4000>,
+	      <0x4 0x10024000 0x0 0x4000>;
+	reg-names = "config", "rc", "port0", "phy0", "intr2axi0";
+	interrupts = <AIC_IRQ 0 1523 IRQ_TYPE_LEVEL_HIGH>;
+	interrupt-names = "port0";
+
+	/* The N1's three functions are on DART streams 1-3 */
+	iommu-map = <0x100 &dart_apcie0 1 3>;
+	bus-range = <0 4>;
+	status = "okay";
+
+	port00: pci@0,0 {
+		device_type = "pci";
+		reg = <0x0 0 0 0 0>;
+		bus-range = <1 1>;
+		apple,link-trained-by-bootloader;
+		/* PERST#, driven only by the root-port reset after the N1's ROM stage */
+		reset-gpios = <&pinctrl_ap 80 GPIO_ACTIVE_LOW>;
+		status = "disabled";
+
+		#address-cells = <3>;
+		#size-cells = <2>;
+		ranges;
+
+		interrupt-controller;
+		#interrupt-cells = <1>;
+		interrupt-map-mask = <0 0 0 7>;
+		interrupt-map = <0 0 0 1 &port00 0 0 0 0>,
+				<0 0 0 2 &port00 0 0 0 1>,
+				<0 0 0 3 &port00 0 0 0 2>,
+				<0 0 0 4 &port00 0 0 0 3>;
+
+		/* platform ID (board 0x04 << 16) | chip 0x6050 */
+		n1_control: control@0,0 {
+			compatible = "pci106b,1900";
+			reg = <0x10000 0x0 0x0 0x0 0x0>;
+			firmware-name = "apple/centauri/k114c-ftab.bin";
+			apple,centauri-platform-id = <0x00046050>;
+			apple,centauri-protocol = <27>;
+		};
+
+		n1_alpha: wifi@0,1 {
+			compatible = "pci106b,1902";
+			reg = <0x10100 0x0 0x0 0x0 0x0>;
+			local-mac-address = [00 00 00 00 00 00];
+		};
+
+		n1_beta: bluetooth@0,2 {
+			compatible = "pci106b,1903";
+			reg = <0x10200 0x0 0x0 0x0 0x0>;
+			local-bd-address = [00 00 00 00 00 00];
+		};
+	};
+};
+
+/*
+ * Pin 112's register takes an SError when read, so only the pins a node here
+ * names are exposed: 80 (PCIe port 0's PERST#).
+ */
+&pinctrl_ap {
+	gpio-reserved-ranges = <0 80>, <81 140>;
+};
+
+#include "t6050-k114c-gpu.dtsi"