From: Anup Patel <apatel@ventanamicro.com>
To: Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Thomas Gleixner <tglx@linutronix.de>,
Marc Zyngier <maz@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Robin Murphy <robin.murphy@arm.com>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Frank Rowand <frowand.list@gmail.com>
Cc: Atish Patra <atishp@atishpatra.org>,
Andrew Jones <ajones@ventanamicro.com>,
Anup Patel <anup@brainfault.org>,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org, iommu@lists.linux.dev,
Anup Patel <apatel@ventanamicro.com>
Subject: [PATCH v3 08/11] dt-bindings: interrupt-controller: Add RISC-V advanced PLIC
Date: Mon, 8 May 2023 19:58:39 +0530 [thread overview]
Message-ID: <20230508142842.854564-9-apatel@ventanamicro.com> (raw)
In-Reply-To: <20230508142842.854564-1-apatel@ventanamicro.com>
We add DT bindings document for RISC-V advanced platform level interrupt
controller (APLIC) defined by the RISC-V advanced interrupt architecture
(AIA) specification.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
---
.../interrupt-controller/riscv,aplic.yaml | 162 ++++++++++++++++++
1 file changed, 162 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/riscv,aplic.yaml
diff --git a/Documentation/devicetree/bindings/interrupt-controller/riscv,aplic.yaml b/Documentation/devicetree/bindings/interrupt-controller/riscv,aplic.yaml
new file mode 100644
index 000000000000..b47a7987b774
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/riscv,aplic.yaml
@@ -0,0 +1,162 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/riscv,aplic.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: RISC-V Advanced Platform Level Interrupt Controller (APLIC)
+
+maintainers:
+ - Anup Patel <anup@brainfault.org>
+
+description:
+ The RISC-V advanced interrupt architecture (AIA) defines an advanced
+ platform level interrupt controller (APLIC) for handling wired interrupts
+ in a RISC-V platform. The RISC-V AIA specification can be found at
+ https://github.com/riscv/riscv-aia.
+
+ The RISC-V APLIC is implemented as hierarchical APLIC domains where all
+ interrupt sources connect to the root domain which can further delegate
+ interrupts to child domains. There is one device tree node for each APLIC
+ domain.
+
+allOf:
+ - $ref: /schemas/interrupt-controller.yaml#
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - qemu,aplic
+ - const: riscv,aplic
+
+ reg:
+ maxItems: 1
+
+ interrupt-controller: true
+
+ "#interrupt-cells":
+ const: 2
+
+ interrupts-extended:
+ minItems: 1
+ maxItems: 16384
+ description:
+ Given APLIC domain directly injects external interrupts to a set of
+ RISC-V HARTS (or CPUs). Each node pointed to should be a riscv,cpu-intc
+ node, which has a riscv node (i.e. RISC-V HART) as parent.
+
+ msi-parent:
+ description:
+ Given APLIC domain forwards wired interrupts as MSIs to a AIA incoming
+ message signaled interrupt controller (IMSIC). If both "msi-parent" and
+ "interrupts-extended" properties are present then it means the APLIC
+ domain supports both MSI mode and Direct mode in HW. In this case, the
+ APLIC driver has to choose between MSI mode or Direct mode.
+
+ riscv,num-sources:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 1
+ maximum: 1023
+ description:
+ Specifies the number of wired interrupt sources supported by this
+ APLIC domain.
+
+ riscv,children:
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+ minItems: 1
+ maxItems: 1024
+ items:
+ maxItems: 1
+ description:
+ A list of child APLIC domains for the given APLIC domain. Each child
+ APLIC domain is assigned a child index in increasing order, with the
+ first child APLIC domain assigned child index 0. The APLIC domain child
+ index is used by firmware to delegate interrupts from the given APLIC
+ domain to a particular child APLIC domain.
+
+ riscv,delegate:
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+ minItems: 1
+ maxItems: 1024
+ items:
+ items:
+ - description: child APLIC domain phandle
+ - description: first interrupt number of this APLIC domain (inclusive)
+ - description: last interrupt number of this APLIC domain (inclusive)
+ description:
+ A interrupt delegation list where each entry is a triple consisting of
+ child APLIC domain phandle, first interrupt number of this APLIC domain,
+ and last interrupt number of this APLIC domain. Firmware must configure
+ interrupt delegation registers based on interrupt delegation list.
+
+required:
+ - compatible
+ - reg
+ - interrupt-controller
+ - "#interrupt-cells"
+ - riscv,num-sources
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ // Example 1 (APLIC domains directly injecting interrupt to HARTs):
+
+ interrupt-controller@c000000 {
+ compatible = "qemu,aplic", "riscv,aplic";
+ interrupts-extended = <&cpu1_intc 11>,
+ <&cpu2_intc 11>,
+ <&cpu3_intc 11>,
+ <&cpu4_intc 11>;
+ reg = <0xc000000 0x4080>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ riscv,num-sources = <63>;
+ riscv,children = <&aplic1>, <&aplic2>;
+ riscv,delegate = <&aplic1 1 63>;
+ };
+
+ aplic1: interrupt-controller@d000000 {
+ compatible = "qemu,aplic", "riscv,aplic";
+ interrupts-extended = <&cpu1_intc 9>,
+ <&cpu2_intc 9>;
+ reg = <0xd000000 0x4080>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ riscv,num-sources = <63>;
+ };
+
+ aplic2: interrupt-controller@e000000 {
+ compatible = "qemu,aplic", "riscv,aplic";
+ interrupts-extended = <&cpu3_intc 9>,
+ <&cpu4_intc 9>;
+ reg = <0xe000000 0x4080>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ riscv,num-sources = <63>;
+ };
+
+ - |
+ // Example 2 (APLIC domains forwarding interrupts as MSIs):
+
+ interrupt-controller@c000000 {
+ compatible = "qemu,aplic", "riscv,aplic";
+ msi-parent = <&imsic_mlevel>;
+ reg = <0xc000000 0x4000>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ riscv,num-sources = <63>;
+ riscv,children = <&aplic3>;
+ riscv,delegate = <&aplic3 1 63>;
+ };
+
+ aplic3: interrupt-controller@d000000 {
+ compatible = "qemu,aplic", "riscv,aplic";
+ msi-parent = <&imsic_slevel>;
+ reg = <0xd000000 0x4000>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ riscv,num-sources = <63>;
+ };
+...
--
2.34.1
next prev parent reply other threads:[~2023-05-08 14:30 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-08 14:28 [PATCH v3 00/11] Linux RISC-V AIA Support Anup Patel
2023-05-08 14:28 ` [PATCH v3 01/11] RISC-V: Add riscv_fw_parent_hartid() function Anup Patel
2023-05-10 12:45 ` Conor Dooley
2023-06-13 8:05 ` Anup Patel
2023-05-08 14:28 ` [PATCH v3 02/11] of/irq: Set FWNODE_FLAG_BEST_EFFORT for the interrupt controller DT nodes Anup Patel
2023-06-08 18:28 ` Rob Herring
2023-06-08 20:04 ` Saravana Kannan
2023-06-09 11:40 ` Anup Patel
2023-06-09 21:17 ` Saravana Kannan
2023-06-13 4:42 ` Anup Patel
2023-05-08 14:28 ` [PATCH v3 03/11] irqchip/riscv-intc: Add support for RISC-V AIA Anup Patel
2023-05-08 14:28 ` [PATCH v3 04/11] dt-bindings: interrupt-controller: Add RISC-V incoming MSI controller Anup Patel
2023-05-10 12:16 ` Conor Dooley
2023-06-13 8:18 ` Anup Patel
2023-05-11 9:49 ` Krzysztof Kozlowski
2023-05-08 14:28 ` [PATCH v3 05/11] irqchip: Add RISC-V incoming MSI controller driver Anup Patel
2023-05-08 14:28 ` [PATCH v3 06/11] irqchip/riscv-imsic: Add support for PCI MSI irqdomain Anup Patel
2023-05-08 14:28 ` [PATCH v3 07/11] irqchip/riscv-imsic: Improve IOMMU DMA support Anup Patel
2023-05-10 10:48 ` Robin Murphy
2023-05-10 15:12 ` Anup Patel
2023-05-15 12:53 ` Jason Gunthorpe
2023-06-13 7:55 ` Anup Patel
2023-05-08 14:28 ` Anup Patel [this message]
2023-05-10 15:41 ` [PATCH v3 08/11] dt-bindings: interrupt-controller: Add RISC-V advanced PLIC Conor Dooley
2023-06-13 10:37 ` Anup Patel
2023-05-08 14:28 ` [PATCH v3 09/11] irqchip: Add RISC-V advanced PLIC driver Anup Patel
2023-05-08 14:28 ` [PATCH v3 10/11] RISC-V: Select APLIC and IMSIC drivers Anup Patel
2023-05-10 12:20 ` Conor Dooley
2023-05-08 14:28 ` [PATCH v3 11/11] MAINTAINERS: Add entry for RISC-V AIA drivers Anup Patel
2023-05-10 10:24 ` [PATCH v3 00/11] Linux RISC-V AIA Support Conor Dooley
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