linux-kernel - Re: [PATCH v6 net-next 8/9] net: dsa: mv88e6xxx: add blackhole ATU entries

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Date:   Thu, 06 Oct 2022 14:24:17 +0200
From:   netdev@...io-technology.com
To:     davem@...emloft.net, kuba@...nel.org
Cc:     netdev@...r.kernel.org, Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Hauke Mehrtens <hauke@...ke-m.de>,
        Woojung Huh <woojung.huh@...rochip.com>,
        UNGLinuxDriver@...rochip.com, Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Ivan Vecera <ivecera@...hat.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <razor@...ckwall.org>,
        Shuah Khan <shuah@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Christian Marangi <ansuelsmth@...il.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Yuwei Wang <wangyuweihx@...il.com>,
        Petr Machata <petrm@...dia.com>,
        Ido Schimmel <idosch@...dia.com>,
        Florent Fourcot <florent.fourcot@...irst.fr>,
        Hans Schultz <schultz.hans@...il.com>,
        Joachim Wiberg <troglobit@...il.com>,
        Amit Cohen <amcohen@...dia.com>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        bridge@...ts.linux-foundation.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v6 net-next 8/9] net: dsa: mv88e6xxx: add blackhole ATU
 entries

On 2022-09-28 17:02, Hans Schultz wrote:
> From: "Hans J. Schultz" <netdev@...io-technology.com>
> 
> Blackhole FDB entries can now be added, deleted or replaced in the
> driver ATU.
> 
> Signed-off-by: Hans J. Schultz <netdev@...io-technology.com>
> ---
>  drivers/net/dsa/mv88e6xxx/chip.c | 78 ++++++++++++++++++++++++++++++--
>  1 file changed, 74 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/dsa/mv88e6xxx/chip.c 
> b/drivers/net/dsa/mv88e6xxx/chip.c
> index 71843fe87f77..a17f30e5d4a6 100644
> --- a/drivers/net/dsa/mv88e6xxx/chip.c
> +++ b/drivers/net/dsa/mv88e6xxx/chip.c
> @@ -2735,6 +2735,72 @@ static int mv88e6xxx_vlan_msti_set(struct 
> dsa_switch *ds,
>  	return err;
>  }
> 
> +struct mv88e6xxx_vid_search_ctx {
> +	u16 vid_search;
> +	u16 fid_found;
> +};
> +
> +static int mv88e6xxx_find_fid_on_matching_vid(struct mv88e6xxx_chip 
> *chip,
> +					      const struct mv88e6xxx_vtu_entry *entry,
> +					      void *priv)
> +{
> +	struct mv88e6xxx_vid_search_ctx *ctx = priv;
> +

FYI: I have already made updates to this part to use mv88e6xxx_vtu_get() 
instead of the walk, which also fixes a problem when vid=0 in this 
implementation.