From: Vladimir Oltean <olteanv@gmail.com>
To: George McCollister <george.mccollister@gmail.com>
Cc: Jakub Kicinski <kuba@kernel.org>, Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Tobias Waldekranz <tobias@waldekranz.com>,
Jonathan Corbet <corbet@lwn.net>,
netdev@vger.kernel.org
Subject: Re: [PATCH net-next v3 2/4] net: hsr: add offloading support
Date: Wed, 10 Feb 2021 11:37:39 +0200 [thread overview]
Message-ID: <20210210093739.wrakrn7d3gngo2m7@skbuf> (raw)
In-Reply-To: <20210210010213.27553-3-george.mccollister@gmail.com>
On Tue, Feb 09, 2021 at 07:02:11PM -0600, George McCollister wrote:
> Add support for offloading of HSR/PRP (IEC 62439-3) tag insertion
> tag removal, duplicate generation and forwarding.
>
> For HSR, insertion involves the switch adding a 6 byte HSR header after
> the 14 byte Ethernet header. For PRP it adds a 6 byte trailer.
>
> Tag removal involves automatically stripping the HSR/PRP header/trailer
> in the switch. This is possible when the switch also performs auto
> deduplication using the HSR/PRP header/trailer (making it no longer
> required).
>
> Forwarding involves automatically forwarding between redundant ports in
> an HSR. This is crucial because delay is accumulated as a frame passes
> through each node in the ring.
>
> Duplication involves the switch automatically sending a single frame
> from the CPU port to both redundant ports. This is required because the
> inserted HSR/PRP header/trailer must contain the same sequence number
> on the frames sent out both redundant ports.
>
> Export is_hsr_master so DSA can tell them apart from other devices in
> dsa_slave_changeupper.
>
> Signed-off-by: George McCollister <george.mccollister@gmail.com>
> ---
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
next prev parent reply other threads:[~2021-02-10 9:41 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-10 1:02 [PATCH net-next v3 0/4] add HSR offloading support for DSA switches George McCollister
2021-02-10 1:02 ` [PATCH net-next v3 1/4] net: hsr: generate supervision frame without HSR/PRP tag George McCollister
2021-02-10 9:33 ` Vladimir Oltean
2021-02-10 1:02 ` [PATCH net-next v3 2/4] net: hsr: add offloading support George McCollister
2021-02-10 9:37 ` Vladimir Oltean [this message]
2021-02-10 1:02 ` [PATCH net-next v3 3/4] net: dsa: add support for offloading HSR George McCollister
2021-02-10 4:04 ` Florian Fainelli
2021-02-10 9:44 ` Vladimir Oltean
2021-02-10 1:02 ` [PATCH net-next v3 4/4] net: dsa: xrs700x: add HSR offloading support George McCollister
2021-02-10 4:11 ` Florian Fainelli
2021-02-10 9:49 ` Vladimir Oltean
2021-02-11 22:00 ` [PATCH net-next v3 0/4] add HSR offloading support for DSA switches patchwork-bot+netdevbpf
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