netdev - RE: [RFC/PATCH 18/18] ravb: Add set

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Date:   Fri, 1 Oct 2021 09:26:14 +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>,
        Sergei Shtylyov <sergei.shtylyov@...il.com>,
        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 18/18] ravb: Add set_feature support for RZ/G2L

> Subject: Re: [RFC/PATCH 18/18] ravb: Add set_feature support for RZ/G2L
> 
> On 01.10.2021 9:53, Biju Das wrote:
> 
> [...]
> >>> This patch adds set_feature support for RZ/G2L.
> >>>
> >>> Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> >>> ---
> >>>   drivers/net/ethernet/renesas/ravb.h      | 32 ++++++++++++++
> >>>   drivers/net/ethernet/renesas/ravb_main.c | 56
> >>> +++++++++++++++++++++++-
> >>>   2 files changed, 87 insertions(+), 1 deletion(-)
> >>>
> >>> diff --git a/drivers/net/ethernet/renesas/ravb.h
> >>> b/drivers/net/ethernet/renesas/ravb.h
> >>> index d42e8ea981df..2275f27c0672 100644
> >>> --- a/drivers/net/ethernet/renesas/ravb.h
> >>> +++ b/drivers/net/ethernet/renesas/ravb.h
> >>> @@ -209,6 +209,8 @@ enum ravb_reg {
> >>>   	CXR56	= 0x0770,	/* Documented for RZ/G2L only */
> >>>   	MAFCR	= 0x0778,
> >>>   	CSR0     = 0x0800,	/* Documented for RZ/G2L only */
> >>> +	CSR1     = 0x0804,	/* Documented for RZ/G2L only */
> >>> +	CSR2     = 0x0808,	/* Documented for RZ/G2L only */
> >>
> >>     These are the TOE regs (CSR0 included), they only exist on RZ/G2L,
> no?
> >
> > See just one line above you can see CSR0 registers and comments on the
> > right clearly mentions "/* Documented for RZ/G2L only */
> 
>     What I meant was commenting on them as /* RZ/GL2 only */ or some such.
> Sorry for not being clear enough.
> 

OK.

> > OK will do CSR0 initialisation as part of this patch instead of patch
> #10.
> 
>     TIA!
> 
> >> [...]
> >>> diff --git a/drivers/net/ethernet/renesas/ravb_main.c
> >>> b/drivers/net/ethernet/renesas/ravb_main.c
> >>> index 72aea5875bc5..641ae5553b64 100644
> >>> --- a/drivers/net/ethernet/renesas/ravb_main.c
> >>> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> >> [...]
> >>> @@ -2290,7 +2308,38 @@ static void ravb_set_rx_csum(struct
> >>> net_device *ndev, bool enable)  static int
> >>> ravb_set_features_rgeth(struct
> >> net_device *ndev,
> >>>   				   netdev_features_t features)
> >>>   {
> >>> -	/* Place holder */
> >>> +	netdev_features_t changed = features ^ ndev->features;
> >>> +	unsigned int reg;
> >>
> >>     u32 reg;
> >>
> >>> +	int error;
> >>> +
> >>> +	reg = ravb_read(ndev, CSR0);
> >>
> >>     ... as this function returns u32.
> 
>     I'm even suggesting to call this variable 'csr0'.

OK. Will change to u32 csr0.

> 
> [...]
> 
> > Regards,
> > Biju
> 
> MBR, Sergey