From: Nipun Gupta <nipun.gupta@amd.com>
To: <robh+dt@kernel.org>, <krzysztof.kozlowski+dt@linaro.org>,
<gregkh@linuxfoundation.org>, <rafael@kernel.org>,
<eric.auger@redhat.com>, <alex.williamson@redhat.com>,
<cohuck@redhat.com>, <song.bao.hua@hisilicon.com>,
<mchehab+huawei@kernel.org>, <maz@kernel.org>,
<f.fainelli@gmail.com>, <jeffrey.l.hugo@gmail.com>,
<saravanak@google.com>, <Michael.Srba@seznam.cz>,
<mani@kernel.org>, <yishaih@nvidia.com>, <jgg@ziepe.ca>,
<jgg@nvidia.com>, <robin.murphy@arm.com>, <will@kernel.org>,
<joro@8bytes.org>, <masahiroy@kernel.org>,
<ndesaulniers@google.com>, <rdunlap@infradead.org>,
<baolu.lu@linux.intel.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kbuild@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<devicetree@vger.kernel.org>
Cc: <okaya@kernel.org>, <harpreet.anand@amd.com>,
<nikhil.agarwal@amd.com>, <michal.simek@amd.com>,
<pieter.jansen-van-vuuren@amd.com>, <pablo.cascon@amd.com>,
<git@amd.com>, Nipun Gupta <nipun.gupta@amd.com>
Subject: [PATCH v10 3/7] dt-bindings: bus: add CDX bus controller for versal net
Date: Mon, 13 Mar 2023 18:56:32 +0530 [thread overview]
Message-ID: <20230313132636.31850-4-nipun.gupta@amd.com> (raw)
In-Reply-To: <20230313132636.31850-1-nipun.gupta@amd.com>
Add CDX bus controller device tree bindings for versal-net
devices.
Signed-off-by: Nipun Gupta <nipun.gupta@amd.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@amd.com>
Tested-by: Nikhil Agarwal <nikhil.agarwal@amd.com>
---
.../bindings/bus/xlnx,versal-net-cdx.yaml | 82 +++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 83 insertions(+)
create mode 100644 Documentation/devicetree/bindings/bus/xlnx,versal-net-cdx.yaml
diff --git a/Documentation/devicetree/bindings/bus/xlnx,versal-net-cdx.yaml b/Documentation/devicetree/bindings/bus/xlnx,versal-net-cdx.yaml
new file mode 100644
index 000000000000..7f62ffbdc245
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/xlnx,versal-net-cdx.yaml
@@ -0,0 +1,82 @@
+# 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 <nipun.gupta@amd.com>
+ - Nikhil Agarwal <nikhil.agarwal@amd.com>
+
+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;
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 16b42c22902b..82b2c5534e1f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -968,6 +968,7 @@ AMD CDX BUS DRIVER
M: Nipun Gupta <nipun.gupta@amd.com>
M: Nikhil Agarwal <nikhil.agarwal@amd.com>
S: Maintained
+F: Documentation/devicetree/bindings/bus/xlnx,versal-net-cdx.yaml
F: drivers/cdx/*
F: include/linux/cdx/*
--
2.17.1
next prev parent reply other threads:[~2023-03-13 13:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-13 13:26 [PATCH v10 0/7] add support for CDX bus Nipun Gupta
2023-03-13 13:26 ` [PATCH v10 1/7] cdx: add the cdx bus driver Nipun Gupta
2023-03-13 13:26 ` [PATCH v10 2/7] iommu: Add iommu probe for CDX bus Nipun Gupta
2023-03-29 10:25 ` Greg KH
2023-03-30 4:34 ` Gupta, Nipun
2023-03-13 13:26 ` Nipun Gupta [this message]
2023-03-13 13:26 ` [PATCH v10 4/7] cdx: add MCDI protocol interface for firmware interaction Nipun Gupta
2023-04-28 8:13 ` Geert Uytterhoeven
2023-04-28 10:53 ` Gupta, Nipun
2023-03-13 13:26 ` [PATCH v10 5/7] cdx: add cdx controller Nipun Gupta
2023-03-13 13:26 ` [PATCH v10 6/7] cdx: add rpmsg communication channel for CDX Nipun Gupta
2023-03-13 13:26 ` [PATCH v10 7/7] cdx: add device attributes Nipun Gupta
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