linux-kernel - Re: [RFC PATCH net-next 4/6] net: ethernet: implement data transaction interface

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Message-ID: <86a014d4-e187-8e51-c635-a0c90e14d226@microchip.com>
Date:   Tue, 12 Sep 2023 13:47:08 +0000
From:   <Parthiban.Veerasooran@...rochip.com>
To:     <horms@...nel.org>
CC:     <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <corbet@....net>, <Steen.Hegelund@...rochip.com>,
        <rdunlap@...radead.org>, <casper.casan@...il.com>,
        <andrew@...n.ch>, <netdev@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-doc@...r.kernel.org>, <Horatiu.Vultur@...rochip.com>,
        <Woojung.Huh@...rochip.com>, <Nicolas.Ferre@...rochip.com>,
        <UNGLinuxDriver@...rochip.com>, <Thorsten.Kummermehr@...rochip.com>
Subject: Re: [RFC PATCH net-next 4/6] net: ethernet: implement data
 transaction interface

Hi Simon,

Thank you for reviewing the patch.

On 10/09/23 11:28 pm, Simon Horman wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> On Fri, Sep 08, 2023 at 07:59:17PM +0530, Parthiban Veerasooran wrote:
>> The ethernet frame to be sent to MAC-PHY is converted into multiple
>> transmit data chunks. A transmit data chunk consists of a 4-byte data
>> header followed by the transmit data chunk payload.
>>
>> The received ethernet frame from the network is converted into multiple
>> receive data chunks by the MAC-PHY and a receive data chunk consists of
>> the receive data chunk payload followed by a 4-byte data footer at the
>> end.
>>
>> The MAC-PHY shall support a default data chunk payload size of 64 bytes.
>> Data chunk payload sizes of 32, 16, or 8 bytes may also be supported. The
>> data chunk payload is always a multiple of 4 bytes.
>>
>> The 4-byte data header occurs at the beginning of each transmit data
>> chunk on MOSI and the 4-byte data footer occurs at the end of each
>> receive data chunk on MISO. The data header and footer contain the
>> information needed to determine the validity and location of the transmit
>> and receive frame data within the data chunk payload. Ethernet frames
>> shall be aligned to a 32-bit boundary within the data chunk payload.
>>
>> Signed-off-by: Parthiban Veerasooran <Parthiban.Veerasooran@...rochip.com>
> 
> Hi Parthiban,
> 
> this patch seems to introduce new Sparse warnings.
> Please consider addressing those, and ideally the warnings
> flagged in the existing oa_tc6.c code.
Sure, will check it in the next revision.

Best Regards,
Parthiban V
> 
> Thanks in advance!
>