netdev - RE: [PATCH net-next v2 8/8] ravb: Add tx_drop_cntrs to struct ravb_hw

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Message-ID: <OS0PR01MB59220310BBD822BB863F642786FE9@OS0PR01MB5922.jpnprd01.prod.outlook.com>
Date:   Tue, 17 Aug 2021 15:47:08 +0000
From:   Biju Das <biju.das.jz@...renesas.com>
To:     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 net-next v2 8/8] ravb: Add tx_drop_cntrs to struct
 ravb_hw_info

Hi Sergei,

Thanks for the feedback.

> Subject: Re: [PATCH net-next v2 8/8] ravb: Add tx_drop_cntrs to struct
> ravb_hw_info
> 
> On 8/2/21 1:26 PM, Biju Das wrote:
> 
> > The register for retrieving TX drop counters is present only on R-Car
> > Gen3 and RZ/G2L; it is not present on R-Car Gen2.
> >
> > Add the tx_drop_cntrs hw feature bit to struct ravb_hw_info, to enable
> > this feature specifically for R-Car Gen3 now and later extend it to
> RZ/G2L.
> >
> > Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > ---
> > v2:
> >  * Incorporated Andrew and Sergei's review comments for making it
> smaller patch
> >    and provided detailed description.
> > ---
> >  drivers/net/ethernet/renesas/ravb.h      | 1 +
> >  drivers/net/ethernet/renesas/ravb_main.c | 4 +++-
> >  2 files changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/ethernet/renesas/ravb.h
> > b/drivers/net/ethernet/renesas/ravb.h
> > index 0d640dbe1eed..35fbb9f60ba8 100644
> > --- a/drivers/net/ethernet/renesas/ravb.h
> > +++ b/drivers/net/ethernet/renesas/ravb.h
> > @@ -1001,6 +1001,7 @@ struct ravb_hw_info {
> >
> >  	/* hardware features */
> >  	unsigned internal_delay:1;	/* RAVB has internal delays */
> > +	unsigned tx_drop_cntrs:1;	/* RAVB has TX error counters */
> 
>    I suggest 'tx_counters' -- this name comes from the sh_eth driver for
> the same regs (but negated meaning). And please don't call the hardware
> RAVB. :-)

Agreed. Will change it to 'tx_counters' on next version and comment it as
/* AVB-DMAC has TX counters */

Cheers,
Biju