diff options
| -rw-r--r-- | Documentation/devicetree/bindings/iommu/arm,smmu-v3.yaml | 27 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/iommu/nvidia,tegra264-cmdqv.yaml | 42 |
2 files changed, 68 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu-v3.yaml b/Documentation/devicetree/bindings/iommu/arm,smmu-v3.yaml index 75fcf4cb52d9..82957334bea2 100644 --- a/Documentation/devicetree/bindings/iommu/arm,smmu-v3.yaml +++ b/Documentation/devicetree/bindings/iommu/arm,smmu-v3.yaml @@ -20,7 +20,12 @@ properties: $nodename: pattern: "^iommu@[0-9a-f]*" compatible: - const: arm,smmu-v3 + oneOf: + - const: arm,smmu-v3 + - items: + - enum: + - nvidia,tegra264-smmu + - const: arm,smmu-v3 reg: maxItems: 1 @@ -58,6 +63,15 @@ properties: msi-parent: true + nvidia,cmdqv: + description: | + A phandle to its pairing CMDQV extension for an implementation on NVIDIA + Tegra SoC. + + If this property is absent, CMDQ-Virtualization won't be used and SMMU + will only use its own CMDQ. + $ref: /schemas/types.yaml#/definitions/phandle + hisilicon,broken-prefetch-cmd: type: boolean description: Avoid sending CMD_PREFETCH_* commands to the SMMU. @@ -69,6 +83,17 @@ properties: register access with page 0 offsets. Set for Cavium ThunderX2 silicon that doesn't support SMMU page1 register space. +allOf: + - if: + not: + properties: + compatible: + contains: + const: nvidia,tegra264-smmu + then: + properties: + nvidia,cmdqv: false + required: - compatible - reg diff --git a/Documentation/devicetree/bindings/iommu/nvidia,tegra264-cmdqv.yaml b/Documentation/devicetree/bindings/iommu/nvidia,tegra264-cmdqv.yaml new file mode 100644 index 000000000000..3f5006a59805 --- /dev/null +++ b/Documentation/devicetree/bindings/iommu/nvidia,tegra264-cmdqv.yaml @@ -0,0 +1,42 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iommu/nvidia,tegra264-cmdqv.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NVIDIA Tegra264 CMDQV + +description: + The CMDQ-Virtualization hardware block is part of the SMMUv3 implementation + on Tegra264 SoCs. It assists in virtualizing the command queue for the SMMU. + +maintainers: + - Nicolin Chen <nicolinc@nvidia.com> + +properties: + compatible: + const: nvidia,tegra264-cmdqv + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + +required: + - compatible + - reg + - interrupts + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/interrupt-controller/irq.h> + + cmdqv@5200000 { + compatible = "nvidia,tegra264-cmdqv"; + reg = <0x5200000 0x830000>; + interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>; + }; |