netdev - RE: [PATCH net-next v1 1/1] net: fec: Add VLAN receive HW support.

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Message-ID: <9848F2DB572E5649BA045B288BE08FBE01505F40@039-SN2MPN1-023.039d.mgd.msft.net>
Date:	Thu, 27 Jun 2013 01:41:08 +0000
From:	Duan Fugang-B38611 <B38611@...escale.com>
To:	Jim Baxter <jim_baxter@...tor.com>
CC:	"David S. Miller" <davem@...emloft.net>,
	Li Frank-B20596 <B20596@...escale.com>,
	Estevam Fabio-R49496 <r49496@...escale.com>,
	Lucas Stach <l.stach@...gutronix.de>,
	Shawn Guo <shawn.guo@...aro.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Ben Hutchings <bhutchings@...arflare.com>
Subject: RE: [PATCH net-next v1 1/1] net: fec: Add VLAN receive HW support.

On 06/26/13 19:45, Jim Baxter wrote:

> On 26/06/13 12:18, Duan Fugang-B38611 wrote:
> > On 06/26/13 18:09, Jim Baxter wrote:
> >> 
> >>> In addition,
> >>> 	1.	enet IP support hw VLAN detect such as imx28-fec, imx6q-fec and mvf600-fec, so you can add the "BD_ENET_RX_VLAN " to those platform driver_data.
> >> I have only tested it on the i.MX6, if someone wants to check it on 
> >> the
> >> imx28 later they can add it to that option.
> > 
> >>> 	2.	Enable the VLAN tag extraction with "NETIF_F_HW_VLAN_CTAG_RX" feature in .ndo_fix_features, which is configured by user.
> >> What do you mean by this, I am only enabling the VLAN code if 
> >> (ndev->features & NETIF_F_HW_VLAN_CTAG_RX) is set. I am pretty sure 
> >> this is set by
> > 
> > You can enable the feature like below, which is reasonable.
> > .ndo_fix_features   = fec_enet_fix_features
> > 
> > static netdev_features_t fec_enet_fix_features (struct net_device *dev, 
> >         netdev_features_t features)
> > {
> >         struct fec_enet_private *fep = netdev_priv(dev);
> > 	  const struct platform_device_id *id_entry =
> > 					platform_get_device_id(fep->pdev);
> > 
> > 	  if (id_entry->driver_data & FEC_QUIRK_HAS_VLAN)
> >         	features |= NETIF_F_HW_VLAN_CTAG_RX;
> > 
> > 	  return features;
> > }
> > 
> > 
> > Thank you,
> > Andy
> > 
> > 
>
> I currently set the features in fec_enet_init() along with setting hw_features, is fec_enet_fix_features() a more correct design for driver implementation point?

Yes, I think it is more reasonable.
Can you hold on the patch to hear others' idea.

Thanks,
Andy


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