83 lines
2.2 KiB
YAML
83 lines
2.2 KiB
YAML
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/bus/xlnx,versal-net-cdx.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: AMD CDX bus controller
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description: |
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CDX bus controller for AMD devices is implemented to dynamically
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detect CDX bus and devices using the firmware.
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The CDX bus manages multiple FPGA based hardware devices, which
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can support network, crypto or any other specialized type of
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devices. These FPGA based devices can be added/modified dynamically
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on run-time.
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All devices on the CDX bus will have a unique streamid (for IOMMU)
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and a unique device ID (for MSI) corresponding to a requestor ID
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(one to one associated with the device). The streamid and deviceid
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are used to configure SMMU and GIC-ITS respectively.
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iommu-map property is used to define the set of stream ids
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corresponding to each device and the associated IOMMU.
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The MSI writes are accompanied by sideband data (Device ID).
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The msi-map property is used to associate the devices with the
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device ID as well as the associated ITS controller.
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rproc property (xlnx,rproc) is used to identify the remote processor
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with which APU (Application Processor Unit) interacts to find out
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the bus and device configuration.
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maintainers:
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- Nipun Gupta <nipun.gupta@amd.com>
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- Nikhil Agarwal <nikhil.agarwal@amd.com>
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properties:
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compatible:
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const: xlnx,versal-net-cdx
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iommu-map: true
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msi-map: true
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xlnx,rproc:
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$ref: /schemas/types.yaml#/definitions/phandle
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description:
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phandle to the remoteproc_r5 rproc node using which APU interacts
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with remote processor.
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ranges: true
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"#address-cells":
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enum: [1, 2]
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"#size-cells":
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enum: [1, 2]
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required:
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- compatible
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- iommu-map
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- msi-map
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- xlnx,rproc
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- ranges
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- "#address-cells"
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- "#size-cells"
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additionalProperties: false
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examples:
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- |
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cdx {
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compatible = "xlnx,versal-net-cdx";
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#address-cells = <1>;
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#size-cells = <1>;
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/* define map for RIDs 250-259 */
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iommu-map = <250 &smmu 250 10>;
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/* define msi map for RIDs 250-259 */
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msi-map = <250 &its 250 10>;
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xlnx,rproc = <&remoteproc_r5>;
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ranges;
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};
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