netdev - RE: [RFC/PATCH 04/18] ravb: Enable aligned_tx and tx

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Date:   Thu, 23 Sep 2021 18:13:39 +0000
From:   Biju Das <biju.das.jz@...renesas.com>
To:     Sergey Shtylyov <s.shtylyov@....ru>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
CC:     Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>,
        Andrew Lunn <andrew@...n.ch>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Adam Ford <aford173@...il.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>
Subject: RE: [RFC/PATCH 04/18] ravb: Enable aligned_tx and tx_counters for
 RZ/G2L

Hi Sergei,

Thanks for the review.

> Subject: Re: [RFC/PATCH 04/18] ravb: Enable aligned_tx and tx_counters for
> RZ/G2L
> 
> On 9/23/21 5:07 PM, Biju Das wrote:
> 
>    Somehow this patch haven't reached my OMP email -- I got it only thru
> the linux-renesas-soc list... :-/
> 
> > RZ/G2L need 4byte address alignment like R-Car Gen2 and it has
> > tx_counters like R-Car Gen3. This patch enable these features for
> > RZ/G2L.
> >
> > Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> > ---
> >  drivers/net/ethernet/renesas/ravb.h      | 2 +-
> >  drivers/net/ethernet/renesas/ravb_main.c | 2 ++
> >  2 files changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/ethernet/renesas/ravb.h
> > b/drivers/net/ethernet/renesas/ravb.h
> > index bee05e6fb815..bb92469d770e 100644
> > --- a/drivers/net/ethernet/renesas/ravb.h
> > +++ b/drivers/net/ethernet/renesas/ravb.h
> > @@ -195,7 +195,7 @@ enum ravb_reg {
> >  	GECMR	= 0x05b0,
> >  	MAHR	= 0x05c0,
> >  	MALR	= 0x05c8,
> > -	TROCR	= 0x0700,	/* R-Car Gen3 only */
> > +	TROCR	= 0x0700,	/* R-Car Gen3 and RZ/G2L only */
> >  	CEFCR	= 0x0740,
> >  	FRECR	= 0x0748,
> >  	TSFRCR	= 0x0750,
> > diff --git a/drivers/net/ethernet/renesas/ravb_main.c
> > b/drivers/net/ethernet/renesas/ravb_main.c
> > index 54c4d31a6950..d38fc33a8e93 100644
> > --- a/drivers/net/ethernet/renesas/ravb_main.c
> > +++ b/drivers/net/ethernet/renesas/ravb_main.c
> > @@ -2114,6 +2114,8 @@ static const struct ravb_hw_info rgeth_hw_info = {
> >  	.set_feature = ravb_set_features_rgeth,
> >  	.dmac_init = ravb_dmac_init_rgeth,
> >  	.emac_init = ravb_rgeth_emac_init,
> > +	.aligned_tx = 1,
> > +	.tx_counters = 1,
> 
>    Mhm, I don't see a connection between those 2 (other than they're both
> for RX). And anyway, this prolly should be a part of the previous patch...

There was a discussion to make smaller patches. If there is no objection, on
the next revision I will add this as part of previous patch.

Regards,
Biju