This series introduces an explicit API through which switchdev drivers mark a bridge port as offloaded or not: - switchdev_bridge_port_offload() - switchdev_bridge_port_unoffload() Currently, the bridge assumes that a port is offloaded if dev_get_port_parent_id(dev, &ppid, recurse=true) returns something, but that is just an assumption that breaks some use cases (like a non-offloaded LAG interface on top of a switchdev port, bridged with other switchdev ports). Along with some consolidation of the bridge logic to assign a "switchdev offloading mark" to a port (now better called a "hardware domain"), this series allows the bridge driver side to no longer impose restrictions on that configuration. Right now, all switchdev drivers must be modified to use the explicit API, but more and more logic can then be placed centrally in the bridge and therefore ease the job of a switchdev driver writer in the future. For example, the first thing we can hook into the explicit switchdev offloading API calls are the switchdev object and FDB replay helpers. So far, these have only been used by DSA in "pull" mode (where the driver must ask for them). Adding the replay helpers to other drivers involves a lot of repetition. But by moving the helpers inside the bridge port offload/unoffload hook points, we can move the entire replay process to "push" mode (where the bridge provides them automatically). The explicit switchdev offloading API will see further extensions in the future. The patches were split from a larger series for easier review: https://patchwork.kernel.org/project/netdevbpf/cover/20210718214434.3938850-1-vladimir.oltean@xxxxxxx/ Changes in v6: - Make the switchdev replay helpers opt-in - Opt out of the replay helpers for mlxsw, rocker, prestera, sparx5, cpsw, am65-cpsw Tobias Waldekranz (2): net: bridge: disambiguate offload_fwd_mark net: bridge: switchdev: recycle unused hwdoms Vladimir Oltean (5): net: dpaa2-switch: use extack in dpaa2_switch_port_bridge_join net: dpaa2-switch: refactor prechangeupper sanity checks net: bridge: switchdev: let drivers inform which bridge ports are offloaded net: bridge: guard the switchdev replay helpers against a NULL notifier block net: bridge: move the switchdev object replay helpers to "push" mode .../ethernet/freescale/dpaa2/dpaa2-switch.c | 67 ++++-- .../ethernet/marvell/prestera/prestera_main.c | 3 +- .../marvell/prestera/prestera_switchdev.c | 12 +- .../marvell/prestera/prestera_switchdev.h | 3 +- .../mellanox/mlxsw/spectrum_switchdev.c | 24 +- .../microchip/sparx5/sparx5_switchdev.c | 24 +- drivers/net/ethernet/mscc/ocelot_net.c | 104 ++++++-- drivers/net/ethernet/rocker/rocker.h | 3 +- drivers/net/ethernet/rocker/rocker_main.c | 9 +- drivers/net/ethernet/rocker/rocker_ofdpa.c | 19 +- drivers/net/ethernet/ti/am65-cpsw-nuss.c | 18 +- drivers/net/ethernet/ti/cpsw_new.c | 16 +- include/linux/if_bridge.h | 57 ++--- net/bridge/br_fdb.c | 4 +- net/bridge/br_if.c | 11 +- net/bridge/br_mdb.c | 4 +- net/bridge/br_private.h | 60 ++++- net/bridge/br_switchdev.c | 227 +++++++++++++++--- net/bridge/br_vlan.c | 4 +- net/dsa/dsa_priv.h | 6 +- net/dsa/port.c | 90 ++----- net/dsa/slave.c | 10 +- 22 files changed, 560 insertions(+), 215 deletions(-) -- 2.25.1
