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Date:   Sat, 21 Nov 2020 07:03:36 -0600
From:   Rob Herring <robh@...nel.org>
To:     Laurentiu Tudor <laurentiu.tudor@....com>
Cc:     leoyang.li@....com, corbet@....net,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-doc@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        linuxppc-dev@...ts.ozlabs.org, ioana.ciornei@....com,
        Ionut-robert Aron <ionut-robert.aron@....com>
Subject: Re: [PATCH v3] dt-bindings: misc: convert fsl,qoriq-mc from txt to
 YAML

On Thu, Nov 12, 2020 at 03:32:54PM +0200, Laurentiu Tudor wrote:
> From: Ionut-robert Aron <ionut-robert.aron@....com>
> 
> Convert fsl,qoriq-mc to YAML in order to automate the verification
> process of dts files. In addition, update MAINTAINERS accordingly
> and, while at it, add some missing files.
> 
> Signed-off-by: Ionut-robert Aron <ionut-robert.aron@....com>
> [laurentiu.tudor@....com: update MINTAINERS, updates & fixes in schema]
> Signed-off-by: Laurentiu Tudor <laurentiu.tudor@....com>
> ---
> Changes in v3:
>  - dropped duplicated "fsl,qoriq-mc-dpmac" schema and replaced with
>    reference to it
>  - fixed a dt_binding_check warning
> Changes in v2:
>  - fixed errors reported by yamllint
>  - dropped multiple unnecessary quotes
>  - used schema instead of text in description
>  - added constraints on dpmac reg property
> 
>  .../devicetree/bindings/misc/fsl,qoriq-mc.txt | 196 ------------------
>  .../bindings/misc/fsl,qoriq-mc.yaml           | 187 +++++++++++++++++
>  .../ethernet/freescale/dpaa2/overview.rst     |   5 +-
>  MAINTAINERS                                   |   4 +-
>  4 files changed, 194 insertions(+), 198 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
>  create mode 100644 Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml


> diff --git a/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml b/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml
> new file mode 100644
> index 000000000000..1dda2ad29717
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml
> @@ -0,0 +1,187 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright 2020 NXP
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/misc/fsl,qoriq-mc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +maintainers:
> +  - Laurentiu Tudor <laurentiu.tudor@....com>
> +
> +title: Freescale Management Complex
> +
> +description: |
> +  The Freescale Management Complex (fsl-mc) is a hardware resource
> +  manager that manages specialized hardware objects used in
> +  network-oriented packet processing applications. After the fsl-mc
> +  block is enabled, pools of hardware resources are available, such as
> +  queues, buffer pools, I/O interfaces. These resources are building
> +  blocks that can be used to create functional hardware objects/devices
> +  such as network interfaces, crypto accelerator instances, L2 switches,
> +  etc.
> +
> +  For an overview of the DPAA2 architecture and fsl-mc bus see:
> +  Documentation/networking/device_drivers/freescale/dpaa2/overview.rst
> +
> +  As described in the above overview, all DPAA2 objects in a DPRC share the
> +  same hardware "isolation context" and a 10-bit value called an ICID
> +  (isolation context id) is expressed by the hardware to identify
> +  the requester.
> +
> +  The generic 'iommus' property is insufficient to describe the relationship
> +  between ICIDs and IOMMUs, so an iommu-map property is used to define
> +  the set of possible ICIDs under a root DPRC and how they map to
> +  an IOMMU.
> +
> +  For generic IOMMU bindings, see:
> +  Documentation/devicetree/bindings/iommu/iommu.txt.
> +
> +  For arm-smmu binding, see:
> +  Documentation/devicetree/bindings/iommu/arm,smmu.yaml.
> +
> +  MC firmware binary images can be found here:
> +  https://github.com/NXP/qoriq-mc-binary
> +
> +properties:
> +  compatible:
> +    const: fsl,qoriq-mc
> +    description:
> +      A Freescale Management Complex compatible with this binding must have
> +      Block Revision Registers BRR1 and BRR2 at offset 0x0BF8 and 0x0BFC in
> +      the MC control register region.
> +
> +  reg:
> +    minItems: 1
> +    items:
> +      - description: the command portal for this machine
> +      - description:
> +          MC control registers. This region may not be present in some
> +          scenarios, such as in the device tree presented to a virtual
> +          machine.
> +
> +  ranges:
> +    description: |
> +      A standard property. Defines the mapping between the child MC address
> +      space and the parent system address space.
> +
> +      The MC address space is defined by 3 components:
> +                <region type> <offset hi> <offset lo>
> +
> +      Valid values for region type are:
> +                  0x0 - MC portals
> +                  0x1 - QBMAN portals
> +
> +  '#address-cells':
> +    const: 3
> +
> +  '#size-cells':
> +    const: 1
> +
> +  dpmacs:
> +    type: object
> +    description:
> +      The fsl-mc node may optionally have dpmac sub-nodes that describe the
> +      relationship between the Ethernet MACs which belong to the MC and the
> +      Ethernet PHYs on the system board.
> +
> +    properties:
> +      '#address-cells':
> +        const: 1
> +
> +      '#size-cells':
> +        const: 0
> +
> +    patternProperties:
> +      "^(dpmac@[0-9a-f]+)|(ethernet@[0-9a-f]+)$":
> +        type: object
> +
> +        description:
> +          see Documentation/devicetree/bindings/net/fsl,qoriq-mc-dpmac.yaml

Use $ref here.

> +
> +  iommu-map:
> +    description: |
> +      Maps an ICID to an IOMMU and associated iommu-specifier data.
> +
> +      The property is an arbitrary number of tuples of
> +      (icid-base, iommu, iommu-base, length).
> +
> +      Any ICID i in the interval [icid-base, icid-base + length) is
> +      associated with the listed IOMMU, with the iommu-specifier
> +      (i - icid-base + iommu-base).
> +
> +  msi-map:
> +    description: |
> +      Maps an ICID to a GIC ITS and associated msi-specifier data.
> +
> +      The property is an arbitrary number of tuples of
> +      (icid-base, gic-its, msi-base, length).
> +
> +      Any ICID in the interval [icid-base, icid-base + length) is
> +      associated with the listed GIC ITS, with the msi-specifier
> +      (i - icid-base + msi-base).
> +
> +  msi-parent:
> +    deprecated: true
> +    description:
> +      Points to the MSI controller node handling message interrupts for the MC.
> +
> +required:
> +  - compatible
> +  - reg
> +  - iommu-map
> +  - msi-map
> +  - ranges
> +  - '#address-cells'
> +  - '#size-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    soc {
> +      #address-cells = <2>;
> +      #size-cells = <2>;
> +
> +      smmu: iommu@...0000 {
> +        compatible = "arm,mmu-500";
> +        #global-interrupts = <1>;
> +        #iommu-cells = <1>;
> +        reg = <0 0x5000000 0 0x800000>;
> +        stream-match-mask = <0x7c00>;
> +        interrupts = <0 13 4>,
> +                     <0 146 4>, <0 147 4>,
> +                     <0 148 4>, <0 149 4>,
> +                     <0 150 4>, <0 151 4>,
> +                     <0 152 4>, <0 153 4>;
> +      };
> +
> +      fsl_mc: fsl-mc@...000000 {
> +        compatible = "fsl,qoriq-mc";
> +        reg = <0x00000008 0x0c000000 0 0x40>,    /* MC portal base */
> +        <0x00000000 0x08340000 0 0x40000>; /* MC control reg */
> +        /* define map for ICIDs 23-64 */
> +        iommu-map = <23 &smmu 23 41>;
> +        /* define msi map for ICIDs 23-64 */
> +        msi-map = <23 &its 23 41>;
> +        #address-cells = <3>;
> +        #size-cells = <1>;
> +
> +        /*
> +        * Region type 0x0 - MC portals
> +        * Region type 0x1 - QBMAN portals
> +        */
> +        ranges = <0x0 0x0 0x0 0x8 0x0c000000 0x4000000
> +                  0x1 0x0 0x0 0x8 0x18000000 0x8000000>;
> +
> +        dpmacs {
> +          #address-cells = <1>;
> +          #size-cells = <0>;
> +
> +          ethernet@1 {
> +            compatible = "fsl,qoriq-mc-dpmac";
> +            reg = <1>;
> +            phy-handle = <&mdio0_phy0>;
> +          };
> +        };
> +      };
> +    };
> diff --git a/Documentation/networking/device_drivers/ethernet/freescale/dpaa2/overview.rst b/Documentation/networking/device_drivers/ethernet/freescale/dpaa2/overview.rst
> index d638b5a8aadd..b3261c5871cc 100644
> --- a/Documentation/networking/device_drivers/ethernet/freescale/dpaa2/overview.rst
> +++ b/Documentation/networking/device_drivers/ethernet/freescale/dpaa2/overview.rst
> @@ -28,6 +28,9 @@ interfaces, an L2 switch, or accelerator instances.
>  The MC provides memory-mapped I/O command interfaces (MC portals)
>  which DPAA2 software drivers use to operate on DPAA2 objects.
>  
> +MC firmware binary images can be found here:
> +https://github.com/NXP/qoriq-mc-binary
> +
>  The diagram below shows an overview of the DPAA2 resource management
>  architecture::
>  
> @@ -338,7 +341,7 @@ Key functions include:
>    a bind of the root DPRC to the DPRC driver
>  
>  The binding for the MC-bus device-tree node can be consulted at
> -*Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt*.
> +*Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml*.
>  The sysfs bind/unbind interfaces for the MC-bus can be consulted at
>  *Documentation/ABI/testing/sysfs-bus-fsl-mc*.
>  
> diff --git a/MAINTAINERS b/MAINTAINERS
> index b516bb34a8d5..e0ce6e2b663c 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -14409,9 +14409,11 @@ M:	Stuart Yoder <stuyoder@...il.com>
>  M:	Laurentiu Tudor <laurentiu.tudor@....com>
>  L:	linux-kernel@...r.kernel.org
>  S:	Maintained
> -F:	Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
> +F:	Documentation/devicetree/bindings/misc/fsl,dpaa2-console.yaml
> +F:	Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml
>  F:	Documentation/networking/device_drivers/ethernet/freescale/dpaa2/overview.rst
>  F:	drivers/bus/fsl-mc/
> +F:	include/linux/fsl/mc.h
>  
>  QT1010 MEDIA DRIVER
>  M:	Antti Palosaari <crope@....fi>
> -- 
> 2.17.1
> 

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