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.mccollis...@gmail.com> > ---
Reviewed-by: Vladimir Oltean <olte...@gmail.com>
