linux-kernel - Re: [PATCH 1/1] dt-bindings: net: snps,dwmac: Document queue config subnodes

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Date:   Mon, 24 Oct 2022 16:47:53 -0400
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Rob Herring <robh@...nel.org>
Cc:     Sebastian Reichel <sebastian.reichel@...labora.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Jose Abreu <joabreu@...opsys.com>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com
Subject: Re: [PATCH 1/1] dt-bindings: net: snps,dwmac: Document queue config
 subnodes

On 24/10/2022 14:53, Rob Herring wrote:
> On Sat, Oct 22, 2022 at 12:05:15PM -0400, Krzysztof Kozlowski wrote:
>> On 21/10/2022 13:10, Sebastian Reichel wrote:
>>> The queue configuration is referenced by snps,mtl-rx-config and
>>> snps,mtl-tx-config. Most in-tree DTs put the referenced object
>>> as child node of the dwmac node.
>>>
>>> This adds proper description for this setup, which has the
>>> advantage of properly making sure only known properties are
>>> used.
>>>
>>> Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
>>> ---
>>>  .../devicetree/bindings/net/snps,dwmac.yaml   | 154 ++++++++++++------
>>>  1 file changed, 108 insertions(+), 46 deletions(-)
>>>
>>> diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>>> index 13b984076af5..0bf6112cec2f 100644
>>> --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>>> +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>>> @@ -167,56 +167,118 @@ properties:
>>>    snps,mtl-rx-config:
>>>      $ref: /schemas/types.yaml#/definitions/phandle
>>>      description:
>>> -      Multiple RX Queues parameters. Phandle to a node that can
>>> -      contain the following properties
>>> -        * snps,rx-queues-to-use, number of RX queues to be used in the
>>> -          driver
>>> -        * Choose one of these RX scheduling algorithms
>>> -          * snps,rx-sched-sp, Strict priority
>>> -          * snps,rx-sched-wsp, Weighted Strict priority
>>> -        * For each RX queue
>>> -          * Choose one of these modes
>>> -            * snps,dcb-algorithm, Queue to be enabled as DCB
>>> -            * snps,avb-algorithm, Queue to be enabled as AVB
>>> -          * snps,map-to-dma-channel, Channel to map
>>> -          * Specifiy specific packet routing
>>> -            * snps,route-avcp, AV Untagged Control packets
>>> -            * snps,route-ptp, PTP Packets
>>> -            * snps,route-dcbcp, DCB Control Packets
>>> -            * snps,route-up, Untagged Packets
>>> -            * snps,route-multi-broad, Multicast & Broadcast Packets
>>> -          * snps,priority, bitmask of the tagged frames priorities assigned to
>>> -            the queue
>>> +      Multiple RX Queues parameters. Phandle to a node that
>>> +      implements the 'rx-queues-config' object described in
>>> +      this binding.
>>> +
>>> +  rx-queues-config:
>>
>> If this field is specific to this device, then you need vendor prefix:
>> snps,rq-queues-config
> 
> Not for a node name...

Right.

Best regards,
Krzysztof