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