This patch series provides support for HSR HW offloading in KSZ9477
switch IC.

To test this feature:
ip link add name hsr0 type hsr slave1 lan1 slave2 lan2 supervision 45 version 1
ip link set dev lan1 up
ip link set dev lan2 up
ip a add 192.168.0.1/24 dev hsr0
ip link set dev hsr0 up

To remove HSR network device:
ip link del hsr0

Test HW:
Two KSZ9477-EVB boards with HSR ports set to "Port1" and "Port2".

Performance SW used:
nuttcp -S --nofork
nuttcp -vv -T 60 -r 192.168.0.2
nuttcp -vv -T 60 -t 192.168.0.2

Code: v6.5-rc7 Linux repository
Tested HSR v0 and v1
Results:
With KSZ9477 offloading support added: RX: 100 Mbps TX: 98 Mbps
With no offloading 		       RX: 63 Mbps  TX: 63 Mbps


Lukasz Majewski (4):
  net: dsa: Extend the ksz_device structure to hold info about HSR ports
  net: dsa: Extend ksz9477 TAG setup to support HSR frames duplication
  net: dsa: hsr: Enable in KSZ9477 switch HW HSR offloading
  net: dsa: hsr: Provide generic HSR ksz_hsr_{join|leave} functions

 drivers/net/dsa/microchip/ksz9477.c    | 103 +++++++++++++++++++++++++
 drivers/net/dsa/microchip/ksz9477.h    |   4 +
 drivers/net/dsa/microchip/ksz_common.c |  81 +++++++++++++++++++
 drivers/net/dsa/microchip/ksz_common.h |   3 +
 include/linux/dsa/ksz_common.h         |   1 +
 net/dsa/tag_ksz.c                      |   5 ++
 6 files changed, 197 insertions(+)

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2.20.1