kernel/linux.git/Documentation/networking/netdev-features.rst, branch v6.6.132Linux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=v6.6.1322021-02-11T21:24:44+00:00net: hsr: add offloading support2021-02-11T21:24:44+00:00George McCollistergeorge.mccollister@gmail.com2021-02-10T01:02:11+00:00urn:sha1:dcf0cd1cc58b8e88793ad6531db9b3a47324ca09
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
docs: networking: convert netdev-features.txt to ReST2020-04-30T19:56:36+00:00Mauro Carvalho Chehabmchehab+huawei@kernel.org2020-04-30T16:04:03+00:00urn:sha1:ea5bacaa2cec6967ed337f4d0ad6034123ca737b
Not much to be done here:
- add SPDX header;
- adjust titles and chapters, adding proper markups;
- add to networking/index.rst.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>