Add L3 unicast route offloading for IPv4 and IPv6 on Sparx5 and LAN969x. This enables hardware-accelerated l3 routing between VLAN upper interfaces on a bridge, with ECMP support.
This series covers the core unicast data path: FIB offload, nexthop groups, ARP/NDP neighbour resolution, and router leg management. Routes are programmed into the hardware LPM (Longest Prefix Match) VCAP, with nexthops resolved through the hardware ARP table for ECMP or inline VCAP actions for single nexthops. The LPM VCAP also requires type_id-aware rule decoding, since it has actionsets of identical length that differ only in their type_id field. Patch 1 fixes a latent bug in the VCAP rule-move algorithm that becomes reachable once the LPM VCAP is added, since LPM is the first VCAP to use rules of coprime size (2 and 3). Patches 2-4 are the remaining preparatory commits for the shared VCAP API. They add the LPM VCAP keysets and actionsets to the autogenerated model for lan969x and sparx5, update the action-side rule decoder to differentiate actionsets by type_id, and expose two helpers (vcap_val_add_rule() and vcap_rule_mod_action_bit()) used by the LPM driver. Patch 5 adds autogenerated register macros for the L3 routing blocks on sparx5 and lan969x. Patch 6 adds the LPM VCAP implementation for sparx5 and lan969x. Patches 7-9 add L3 unicast routing to sparx5 and lan969x. The router code is split into three patches: Patch 7 (infrastructure + legs): Router leg lifecycle tied to VLAN uppers on a bridge, address event handling, base MAC tracking, blackhole leg for blackhole routes, and the hardware enable sequence. Patch 8 (FIB + nexthop + neighbour CRUD): This is a large patch, and splitting it further is difficult due to the dependencies in FIB and neighbour event paths. The destroy path for a FIB entry must update neighbour state and notify nexthops, so neighbour CRUD functions are called from both the FIB event path and the neighbour event path. Patch 9 (neighbour events): Registers the netevent notifier for NETEVENT_NEIGH_UPDATE used in ARP/NDP resolution, wiring up the final piece. Signed-off-by: Jens Emil Schulz Østergaard <[email protected]> --- Jens Emil Schulz Østergaard (9): net: microchip: vcap: fix rule move for rules of coprime size net: microchip: vcap: add lpm vcap to autogen vcap api net: microchip: vcap: make vcap actionset decoding type_id aware net: microchip: vcap: expose helpers in vcap api and update debugfs net: sparx5: add l3 routing registers net: sparx5: vcap: add lpm vcap implementation net: sparx5: add L3 router infrastructure and leg management net: sparx5: add L3 FIB, nexthop and neighbour entry management net: sparx5: add neighbour event handling for L3 routing drivers/net/ethernet/microchip/sparx5/Makefile | 2 +- .../ethernet/microchip/sparx5/lan969x/lan969x.c | 2 + .../microchip/sparx5/lan969x/lan969x_regs.c | 20 +- .../microchip/sparx5/lan969x/lan969x_vcap_ag_api.c | 373 ++- .../microchip/sparx5/lan969x/lan969x_vcap_impl.c | 12 + .../net/ethernet/microchip/sparx5/sparx5_main.c | 13 +- .../net/ethernet/microchip/sparx5/sparx5_main.h | 46 + .../ethernet/microchip/sparx5/sparx5_main_regs.h | 691 ++++- .../net/ethernet/microchip/sparx5/sparx5_regs.c | 20 +- .../net/ethernet/microchip/sparx5/sparx5_regs.h | 20 +- .../net/ethernet/microchip/sparx5/sparx5_router.c | 3095 ++++++++++++++++++++ .../ethernet/microchip/sparx5/sparx5_vcap_ag_api.c | 373 ++- .../ethernet/microchip/sparx5/sparx5_vcap_ag_api.h | 6 +- .../ethernet/microchip/sparx5/sparx5_vcap_impl.c | 159 +- .../ethernet/microchip/sparx5/sparx5_vcap_impl.h | 5 + drivers/net/ethernet/microchip/vcap/vcap_ag_api.h | 94 +- drivers/net/ethernet/microchip/vcap/vcap_api.c | 219 +- drivers/net/ethernet/microchip/vcap/vcap_api.h | 4 +- .../net/ethernet/microchip/vcap/vcap_api_client.h | 6 + .../net/ethernet/microchip/vcap/vcap_api_debugfs.c | 13 +- .../net/ethernet/microchip/vcap/vcap_api_kunit.c | 81 +- .../net/ethernet/microchip/vcap/vcap_model_kunit.c | 6 +- 22 files changed, 5123 insertions(+), 137 deletions(-) --- base-commit: f6033078a9e671e3c8b83d387b91591a6f6a54e7 change-id: 20260210-sparx5_l3_routing-962458e4d3da Best regards, -- Jens Emil Schulz Østergaard <[email protected]>
