netdev - Re: [PATCH net-next v7 9/9] net: lan966x: Extend switchdev with fdb support

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Date:   Sat, 18 Dec 2021 14:00:14 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     Vladimir Oltean <vladimir.oltean@....com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "UNGLinuxDriver@...rochip.com" <UNGLinuxDriver@...rochip.com>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "vivien.didelot@...il.com" <vivien.didelot@...il.com>,
        "andrew@...n.ch" <andrew@...n.ch>
Subject: Re: [PATCH net-next v7 9/9] net: lan966x: Extend switchdev with fdb
 support

The 12/17/2021 18:12, Vladimir Oltean wrote:
> 
> On Fri, Dec 17, 2021 at 04:53:53PM +0100, Horatiu Vultur wrote:
> > Extend lan966x driver with fdb support by implementing the switchdev
> > calls SWITCHDEV_FDB_ADD_TO_DEVICE and SWITCHDEV_FDB_DEL_TO_DEVICE.
> >
> > Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
> > ---
> 
> Looks pretty good. Just one question, since I can't figure this out by
> looking at the code. Is the CPU port in the unknown unicast flood mask
> currently?

It is not. Because under a bridge can be only lan966x ports so the
HW will do already the flooding of the frames.

> 
> >  .../net/ethernet/microchip/lan966x/Makefile   |   2 +-
> >  .../ethernet/microchip/lan966x/lan966x_fdb.c  | 244 ++++++++++++++++++
> >  .../ethernet/microchip/lan966x/lan966x_main.c |   5 +
> >  .../ethernet/microchip/lan966x/lan966x_main.h |  14 +
> >  .../microchip/lan966x/lan966x_switchdev.c     |  21 ++
> >  .../ethernet/microchip/lan966x/lan966x_vlan.c |  15 +-
> >  6 files changed, 298 insertions(+), 3 deletions(-)
> >  create mode 100644 drivers/net/ethernet/microchip/lan966x/lan966x_fdb.c
> (...)
> > +static void lan966x_fdb_add_entry(struct lan966x *lan966x,
> > +                               struct switchdev_notifier_fdb_info *fdb_info)
> > +{
> > +     struct lan966x_fdb_entry *fdb_entry;
> > +
> > +     fdb_entry = lan966x_fdb_find_entry(lan966x, fdb_info);
> > +     if (fdb_entry) {
> > +             fdb_entry->references++;
> > +             return;
> > +     }
> > +
> > +     fdb_entry = kzalloc(sizeof(*fdb_entry), GFP_KERNEL);
> > +     if (!fdb_entry)
> > +             return;
> > +
> > +     memcpy(fdb_entry->mac, fdb_info->addr, ETH_ALEN);
> 
> ether_addr_copy
> 
> > +     fdb_entry->vid = fdb_info->vid;
> > +     fdb_entry->references = 1;
> > +     list_add_tail(&fdb_entry->list, &lan966x->fdb_entries);
> > +}

-- 
/Horatiu