John Hurley says, These patches deal with 'implicit recirculation' on the NFP. This is a firmware feature whereby a packet egresses to an 'internal' port meaning that it will recirculate back to the header extract phase with the 'internal' port now marked as its ingress port. This internal port can then be matched on by another rule. This process simulates how OvS datapath outputs to an internal port. The FW traces the packet's recirculation route and sends a 'merge hint' to the driver telling it which flows it matched against. The driver can then decide if these flows can be merged to a single rule and offloaded.
The patches deal with the following issues: - assigning/freeing IDs to/from each of these new internal ports - offloading rules that match on internal ports - offloading neighbour table entries whose egress port is internal - handling fallback traffic with an internal port as ingress - using merge hints to create 'faster path' flows and tracking stats etc. John Hurley (11): nfp: flower: turn on recirc and merge hint support in firmware nfp: flower: allow offloading of matches on 'internal' ports nfp: allow fallback packets from non-reprs nfp: flower: support fallback packets from internal ports nfp: flower: allow tunnels to output to internal port nfp: flower: get flows by host context nfp: flower: handle merge hint messages nfp: flower: validate merge hint flows nfp: flower: generate merge flow rule nfp: flower: support stats update for merge flows nfp: flower: offload merge flows drivers/net/ethernet/netronome/nfp/abm/main.c | 5 +- drivers/net/ethernet/netronome/nfp/flower/cmsg.c | 55 +- drivers/net/ethernet/netronome/nfp/flower/cmsg.h | 19 + drivers/net/ethernet/netronome/nfp/flower/main.c | 149 ++++- drivers/net/ethernet/netronome/nfp/flower/main.h | 69 +++ drivers/net/ethernet/netronome/nfp/flower/match.c | 9 +- .../net/ethernet/netronome/nfp/flower/metadata.c | 117 +++- .../net/ethernet/netronome/nfp/flower/offload.c | 606 ++++++++++++++++++++- .../ethernet/netronome/nfp/flower/tunnel_conf.c | 11 +- drivers/net/ethernet/netronome/nfp/nfp_app.h | 13 +- .../net/ethernet/netronome/nfp/nfp_net_common.c | 16 +- 11 files changed, 1016 insertions(+), 53 deletions(-) -- 2.11.0
