netdev - Re: [PATCH net-next v3 13/14] ravb: Update ravb_emac_init

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Date:   Tue, 12 Oct 2021 20:34:07 +0300
From:   Sergey Shtylyov <s.shtylyov@....ru>
To:     Biju Das <biju.das.jz@...renesas.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
CC:     Sergei Shtylyov <sergei.shtylyov@...il.com>,
        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>, <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 v3 13/14] ravb: Update ravb_emac_init_gbeth()

On 10/12/21 7:36 PM, Biju Das wrote:

> This patch enables Receive/Transmit port of TOE and removes
> the setting of promiscuous bit from EMAC configuration mode register.
> 
> This patch also update EMAC configuration mode comment from
> "PAUSE prohibition" to "EMAC Mode: PAUSE prohibition; Duplex; TX;
> RX; CRC Pass Through".

   I'm not sure why you set ECMR.RCPT while you don't have the checksum offloaded...

> Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> ---
> v2->v3:
>  * Enabled TPE/RPE of TOE, as disabling causes loopback test to fail
>  * Documented CSR0 register bits
>  * Removed PRM setting from EMAC configuration mode
>  * Updated EMAC configuration mode.
> v1->v2:
>  * No change
> V1:
>  * New patch.
> ---
>  drivers/net/ethernet/renesas/ravb.h      | 6 ++++++
>  drivers/net/ethernet/renesas/ravb_main.c | 5 +++--
>  2 files changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
> index 69a771526776..08062d73df10 100644
> --- a/drivers/net/ethernet/renesas/ravb.h
> +++ b/drivers/net/ethernet/renesas/ravb.h
> @@ -204,6 +204,7 @@ enum ravb_reg {
>  	TLFRCR	= 0x0758,
>  	RFCR	= 0x0760,
>  	MAFCR	= 0x0778,
> +	CSR0    = 0x0800,	/* RZ/G2L only */
>  };
>  
>  
> @@ -964,6 +965,11 @@ enum CXR31_BIT {
>  	CXR31_SEL_LINK1	= 0x00000008,
>  };
>  
> +enum CSR0_BIT {
> +	CSR0_TPE	= 0x00000010,
> +	CSR0_RPE	= 0x00000020,
> +};
> +

  Is this really needed if you have ECMR.RCPT cleared?

[...]

MBR, Sergey