netdev - Re: [PATCHv2 1/5] sh_eth: add generic wake-on-lan support via magic packet

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Message-ID: <20161219164159.GF21006@bigcity.dyn.berto.se>
Date:   Mon, 19 Dec 2016 17:41:59 +0100
From:   "Niklas Söderlund" <niklas.soderlund@...natech.se>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:     Simon Horman <horms+renesas@...ge.net.au>, netdev@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: [PATCHv2 1/5] sh_eth: add generic wake-on-lan support via magic
 packet

Hi Sergei,

On 2016-12-18 00:50:59 +0300, Sergei Shtylyov wrote:
> Hello!
> 
> On 12/12/2016 07:09 PM, Niklas Söderlund wrote:
> 
>    Not the complete review yet, just some superficial comments.
> 
> > Add generic functionality to support Wake-on-Lan using MagicPacket which
> 
>    LAN.
> 
> > are supported by at least a few versions of sh_eth. Only add
> > functionality for WoL, no specific sh_eth version are marked to support
> > WoL yet.
> 
> [...]
> 
> > diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
> > index 05b0dc5..87640b9 100644
> > --- a/drivers/net/ethernet/renesas/sh_eth.c
> > +++ b/drivers/net/ethernet/renesas/sh_eth.c
> [...]
> > @@ -3150,15 +3187,67 @@ static int sh_eth_drv_remove(struct platform_device *pdev)
> [...]
> > +static int sh_eth_wol_restore(struct net_device *ndev)
> > +{
> > +	struct sh_eth_private *mdp = netdev_priv(ndev);
> > +	int ret;
> > +
> > +	napi_enable(&mdp->napi);
> > +
> > +	/* Disable MagicPacket */
> > +	sh_eth_modify(ndev, ECMR, ECMR_PMDE, 0);
> > +
> > +	/* The device need to be reset to restore MagicPacket logic
> 
>    Needs.
> 
> [...]
> > index d050f37..4ceed00 100644
> > --- a/drivers/net/ethernet/renesas/sh_eth.h
> > +++ b/drivers/net/ethernet/renesas/sh_eth.h
> > @@ -493,6 +493,7 @@ struct sh_eth_cpu_data {
> >  	unsigned shift_rd0:1;	/* shift Rx descriptor word 0 right by 16 */
> >  	unsigned rmiimode:1;	/* EtherC has RMIIMODE register */
> >  	unsigned rtrate:1;	/* EtherC has RTRATE register */
> > +	unsigned magic:1;	/* EtherC has ECMR.PMDE and ECSR.MPD */
> 
>    After looking at the SH7734/63 manuals it became obvious that PMDE was a
> result of typo, the bit is called MPDE actually, the current name doesn't
> make sense anyway. Care to fix?

Sure, I add fixup patch to the front of this series which cleans this up 
before adding WoL support. Or would you prefer I sent a separate patch 
and have the WoL series depend on it?

> 
> MBR, Sergei
> 

-- 
Regards,
Niklas Söderlund