netdev - Re: [PATCH 07/10] ravb: Add tsrq to struct ravb_hw

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Date:   Mon, 4 Oct 2021 21:54:26 +0300
From:   Sergey Shtylyov <s.shtylyov@....ru>
To:     Biju Das <biju.das.jz@...renesas.com>,
        Sergei Shtylyov <sergei.shtylyov@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Jakub Kicinski" <kuba@...nel.org>
CC:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Sergey Shtylyov <s.shtylyov@...russia.ru>,
        Adam Ford <aford173@...il.com>, Andrew Lunn <andrew@...n.ch>,
        Yuusuke Ashizuka <ashiduka@...itsu.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das@...renesas.com>,
        "Prabhakar Mahadev Lad" <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH 07/10] ravb: Add tsrq to struct ravb_hw_info

On 10/4/21 9:47 PM, Biju Das wrote:

[...]
>>>    The TCCR bits are called transmit start request (queue 0/1), not
>> transmit start request queue 0/1.
>>> I think you've read too much value into them for what is just TX queue
>> 0/1.
>>>
>>>> Add a tsrq variable to struct ravb_hw_info to handle this difference.
>>>>
>>>> Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
>>>> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>>>> ---
>>>> RFC->v1:
>>>>  * Added tsrq variable instead of multi_tsrq feature bit.
>>>> ---
>>>>  drivers/net/ethernet/renesas/ravb.h      | 1 +
>>>>  drivers/net/ethernet/renesas/ravb_main.c | 9 +++++++--
>>>>  2 files changed, 8 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/drivers/net/ethernet/renesas/ravb.h
>>>> b/drivers/net/ethernet/renesas/ravb.h
>>>> index 9cd3a15743b4..c586070193ef 100644
>>>> --- a/drivers/net/ethernet/renesas/ravb.h
>>>> +++ b/drivers/net/ethernet/renesas/ravb.h
>>>> @@ -997,6 +997,7 @@ struct ravb_hw_info {
>>>>  	netdev_features_t net_features;
>>>>  	int stats_len;
>>>>  	size_t max_rx_len;
>>>> +	u32 tsrq;
>>>
>>>    I'd call it 'tccr_value' instead.
>>
>>     Or even better, 'tccr_mask'...
> 
> We are not masking anything here right.

    We do -- we pass the TCCR mask to ravb_wait().

[...]

> Regards,
> Biju

MBR, Sergey