Merge tag 'tenstorrent-dt-for-v6.19' of https://github.com/tenstorrent/linux into soc/newsoc

Tenstorrent device tree for v6.19

Add Tenstorrent as a vendor and enable support for the Blackhole SoC
in Blackhole P100 and P150 PCIe cards. The SoC contains four RISC-V
CPU tiles consisting of 4x SiFive X280 cores.

There is a virtual UART implemented in OpenSBI firmware that allows a
console program on the PCIe host to communicate through shared memory
with Linux running on the Blackhole card.

Link: https://github.com/tenstorrent/tt-bh-linux
Link: https://github.com/tenstorrent/opensbi/
Signed-off-by: Drew Fustini <fustini@kernel.org>

* tag 'tenstorrent-dt-for-v6.19' of https://github.com/tenstorrent/linux:
  riscv: defconfig: Enable Tenstorrent SoCs
  riscv: Kconfig.socs: Add ARCH_TENSTORRENT for Tenstorrent SoCs
  riscv: dts: Add Tenstorrent Blackhole SoC PCIe cards
  dt-bindings: interrupt-controller: Add Tenstorrent Blackhole compatible
  dt-bindings: timers: Add Tenstorrent Blackhole compatible
  dt-bindings: riscv: cpus: Add SiFive X280 compatible
  dt-bindings: riscv: Add Tenstorrent Blackhole compatible
  dt-bindings: vendor-prefixes: Add Tenstorrent AI ULC

12 files changed, 176 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
index f683d696909b..9886b7d73d3c 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
+++ b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
@@ -64,6 +64,7 @@ properties:
               - spacemit,k1-plic
               - starfive,jh7100-plic
               - starfive,jh7110-plic
+              - tenstorrent,blackhole-plic
           - const: sifive,plic-1.0.0
       - items:
           - enum:
diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
index 153d0dac57fb..afb8533f6a08 100644
--- a/Documentation/devicetree/bindings/riscv/cpus.yaml
+++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
@@ -70,6 +70,7 @@ properties:
           - enum:
               - sifive,e51
               - sifive,u54-mc
+              - sifive,x280
           - const: sifive,rocket0
           - const: riscv
       - const: riscv    # Simulator only
diff --git a/Documentation/devicetree/bindings/riscv/tenstorrent.yaml b/Documentation/devicetree/bindings/riscv/tenstorrent.yaml
new file mode 100644
index 000000000000..e15359b2aab6
--- /dev/null
+++ b/Documentation/devicetree/bindings/riscv/tenstorrent.yaml
@@ -0,0 +1,28 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/riscv/tenstorrent.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Tenstorrent SoC-based boards
+
+maintainers:
+  - Drew Fustini <dfustini@oss.tenstorrent.com>
+  - Joel Stanley <jms@oss.tenstorrent.com>
+
+description:
+  Tenstorrent SoC-based boards
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - description: Tenstorrent Blackhole PCIe card
+        items:
+          - const: tenstorrent,blackhole-card
+          - const: tenstorrent,blackhole
+
+additionalProperties: true
+
+...
diff --git a/Documentation/devicetree/bindings/timer/sifive,clint.yaml b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
index d85a1a088b35..0d3b8dc362ba 100644
--- a/Documentation/devicetree/bindings/timer/sifive,clint.yaml
+++ b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
@@ -36,6 +36,7 @@ properties:
               - starfive,jh7100-clint   # StarFive JH7100
               - starfive,jh7110-clint   # StarFive JH7110
               - starfive,jh8100-clint   # StarFive JH8100
+              - tenstorrent,blackhole-clint # Tenstorrent Blackhole
           - const: sifive,clint0        # SiFive CLINT v0 IP block
       - items:
           - {}
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index f1d1882009ba..21921be22207 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1610,6 +1610,8 @@ patternProperties:
     description: Tempo Semiconductor
   "^tenda,.*":
     description: Shenzhen Tenda Technology Co., Ltd.
+  "^tenstorrent,.*":
+    description: Tenstorrent AI ULC
   "^terasic,.*":
     description: Terasic Inc.
   "^tesla,.*":
diff --git a/MAINTAINERS b/MAINTAINERS
index 3da2c26a796b..10f16f64141e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -22184,6 +22184,15 @@ F:	arch/riscv/boot/dts/spacemit/
 N:	spacemit
 K:	spacemit
 
+RISC-V TENSTORRENT SoC SUPPORT
+M:	Drew Fustini <dfustini@oss.tenstorrent.com>
+M:	Joel Stanley <jms@oss.tenstorrent.com>
+L:	linux-riscv@lists.infradead.org
+S:	Maintained
+T:	git https://github.com/tenstorrent/linux.git
+F:	Documentation/devicetree/bindings/riscv/tenstorrent.yaml
+F:	arch/riscv/boot/dts/tenstorrent/
+
 RISC-V THEAD SoC SUPPORT
 M:	Drew Fustini <fustini@kernel.org>
 M:	Guo Ren <guoren@kernel.org>
diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
index 848e7149e443..0b4d408aebfa 100644
--- a/arch/riscv/Kconfig.socs
+++ b/arch/riscv/Kconfig.socs
@@ -63,6 +63,14 @@ config ARCH_SUNXI
 	  This enables support for Allwinner sun20i platform hardware,
 	  including boards based on the D1 and D1s SoCs.
 
+config ARCH_TENSTORRENT
+	bool "Tenstorrent SoCs"
+	help
+	  This enables support for Tenstorrent SoC platforms.
+	  Current support is for Blackhole P100 and P150 PCIe cards.
+	  The Blackhole SoC contains four RISC-V CPU tiles each
+	  consisting of 4x SiFive X280 cores.
+
 config ARCH_THEAD
 	bool "T-HEAD RISC-V SoCs"
 	depends on MMU && !XIP_KERNEL
diff --git a/arch/riscv/boot/dts/Makefile b/arch/riscv/boot/dts/Makefile
index 3763d199c70a..cf179c6253ce 100644
--- a/arch/riscv/boot/dts/Makefile
+++ b/arch/riscv/boot/dts/Makefile
@@ -9,4 +9,5 @@ subdir-y += sifive
 subdir-y += sophgo
 subdir-y += spacemit
 subdir-y += starfive
+subdir-y += tenstorrent
 subdir-y += thead
diff --git a/arch/riscv/boot/dts/tenstorrent/Makefile b/arch/riscv/boot/dts/tenstorrent/Makefile
new file mode 100644
index 000000000000..2c81faaba462
--- /dev/null
+++ b/arch/riscv/boot/dts/tenstorrent/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_TENSTORRENT) += blackhole-card.dtb
diff --git a/arch/riscv/boot/dts/tenstorrent/blackhole-card.dts b/arch/riscv/boot/dts/tenstorrent/blackhole-card.dts
new file mode 100644
index 000000000000..f53667ce73a9
--- /dev/null
+++ b/arch/riscv/boot/dts/tenstorrent/blackhole-card.dts
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/dts-v1/;
+
+#include "blackhole.dtsi"
+
+/ {
+	model = "Tenstorrent Blackhole";
+	compatible = "tenstorrent,blackhole-card", "tenstorrent,blackhole";
+
+	memory@400030000000 {
+		device_type = "memory";
+		reg = <0x4000 0x30000000 0x1 0x00000000>;
+	};
+};
diff --git a/arch/riscv/boot/dts/tenstorrent/blackhole.dtsi b/arch/riscv/boot/dts/tenstorrent/blackhole.dtsi
new file mode 100644
index 000000000000..6408810d8d80
--- /dev/null
+++ b/arch/riscv/boot/dts/tenstorrent/blackhole.dtsi
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+// Copyright 2025 Tenstorrent AI ULC
+/dts-v1/;
+
+/ {
+	compatible = "tenstorrent,blackhole";
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		timebase-frequency = <50000000>;
+
+		cpu@0 {
+			compatible = "sifive,x280", "sifive,rocket0", "riscv";
+			device_type = "cpu";
+			reg = <0>;
+			mmu-type = "riscv,sv57";
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zicsr",
+					       "zifencei", "zfh", "zba", "zbb", "sscofpmf";
+
+			cpu0_intc: interrupt-controller {
+				compatible = "riscv,cpu-intc";
+				#interrupt-cells = <1>;
+				interrupt-controller;
+			};
+		};
+
+		cpu@1 {
+			compatible = "sifive,x280", "sifive,rocket0", "riscv";
+			device_type = "cpu";
+			reg = <1>;
+			mmu-type = "riscv,sv57";
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zicsr",
+					       "zifencei", "zfh", "zba", "zbb", "sscofpmf";
+
+			cpu1_intc: interrupt-controller {
+				compatible = "riscv,cpu-intc";
+				#interrupt-cells = <1>;
+				interrupt-controller;
+			};
+		};
+
+		cpu@2 {
+			compatible = "sifive,x280", "sifive,rocket0", "riscv";
+			device_type = "cpu";
+			reg = <2>;
+			mmu-type = "riscv,sv57";
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zicsr",
+					       "zifencei", "zfh", "zba", "zbb", "sscofpmf";
+
+			cpu2_intc: interrupt-controller {
+				compatible = "riscv,cpu-intc";
+				#interrupt-cells = <1>;
+				interrupt-controller;
+			};
+		};
+
+		cpu@3 {
+			compatible = "sifive,x280", "sifive,rocket0", "riscv";
+			device_type = "cpu";
+			reg = <3>;
+			mmu-type = "riscv,sv57";
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zicsr",
+					       "zifencei", "zfh", "zba", "zbb", "sscofpmf";
+
+			cpu3_intc: interrupt-controller {
+				compatible = "riscv,cpu-intc";
+				#interrupt-cells = <1>;
+				interrupt-controller;
+			};
+		};
+	};
+
+	soc {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		compatible = "simple-bus";
+		ranges;
+
+		clint0: timer@2000000 {
+			compatible = "tenstorrent,blackhole-clint", "sifive,clint0";
+			reg = <0x0 0x2000000 0x0 0x10000>;
+			interrupts-extended = <&cpu0_intc 0x3>, <&cpu0_intc 0x7>,
+					      <&cpu1_intc 0x3>, <&cpu1_intc 0x7>,
+					      <&cpu2_intc 0x3>, <&cpu2_intc 0x7>,
+					      <&cpu3_intc 0x3>, <&cpu3_intc 0x7>;
+		};
+
+		plic0: interrupt-controller@c000000 {
+			compatible = "tenstorrent,blackhole-plic", "sifive,plic-1.0.0";
+			reg = <0x0 0x0c000000 0x0 0x04000000>;
+			interrupts-extended = <&cpu0_intc 11>, <&cpu0_intc 9>,
+					      <&cpu1_intc 11>, <&cpu1_intc 9>,
+					      <&cpu2_intc 11>, <&cpu2_intc 9>,
+					      <&cpu3_intc 11>, <&cpu3_intc 9>;
+			interrupt-controller;
+			#interrupt-cells = <1>;
+			#address-cells = <0>;
+			riscv,ndev = <128>;
+		};
+	};
+};
diff --git a/arch/riscv/configs/defconfig b/arch/riscv/configs/defconfig
index fc2725cbca18..95d5230c0027 100644
--- a/arch/riscv/configs/defconfig
+++ b/arch/riscv/configs/defconfig
@@ -29,6 +29,7 @@ CONFIG_ARCH_SOPHGO=y
 CONFIG_ARCH_SPACEMIT=y
 CONFIG_SOC_STARFIVE=y
 CONFIG_ARCH_SUNXI=y
+CONFIG_ARCH_TENSTORRENT=y
 CONFIG_ARCH_THEAD=y
 CONFIG_ARCH_VIRT=y
 CONFIG_ARCH_CANAAN=y