[PATCH net-next v2 0/8] Add support for two classes of VCAP rules

Steen Hegelund
2023-01-06T08:54:41Z

This adds support for two classes of VCAP rules:

- Permanent rules (added e.g. for PTP support)
- TC user rules (added by the TC userspace tool)

For this to work the VCAP Loopups must be enabled from boot, so that the
"internal" clients like PTP can add rules that are always active.

When the TC tool add a flower filter the VCAP rule corresponding to this
filter will be disabled (kept in memory) until a TC matchall filter creates
a link from chain 0 to the chain (lookup) where the flower filter was
added.

When the flower filter is enabled it will be written to the appropriate
VCAP lookup and become active in HW.

Likewise the flower filter will be disabled if there is no link from chain
0 to the chain of the filter (lookup), and when that happens the
corresponding VCAP rule will be read from the VCAP instance and stored in
memory until it is deleted or enabled again.

Version History:
================
v2 Adding a missing goto exit in vcap_add_rule (Dan Carpenter).
Added missing checks for error returns in vcap_enable_rule.

v1 Initial version

Steen Hegelund (8):
net: microchip: vcap api: Erase VCAP cache before encoding rule
net: microchip: sparx5: Reset VCAP counter for new rules
net: microchip: vcap api: Always enable VCAP lookups
net: microchip: vcap api: Convert multi-word keys/actions when
encoding
net: microchip: vcap api: Use src and dst chain id to chain VCAP
lookups
net: microchip: vcap api: Check chains when adding a tc flower filter
net: microchip: vcap api: Add a storage state to a VCAP rule
net: microchip: vcap api: Enable/Disable rules via chains in VCAP HW

.../ethernet/microchip/lan966x/lan966x_goto.c | 10 +-
.../ethernet/microchip/lan966x/lan966x_main.h | 3 +-
.../microchip/lan966x/lan966x_tc_flower.c | 30 +-
.../microchip/lan966x/lan966x_tc_matchall.c | 16 +-
.../microchip/lan966x/lan966x_vcap_impl.c | 24 +-
.../microchip/sparx5/sparx5_tc_flower.c | 28 +-
.../microchip/sparx5/sparx5_tc_matchall.c | 16 +-
.../microchip/sparx5/sparx5_vcap_debugfs.c | 2 +-
.../microchip/sparx5/sparx5_vcap_impl.c | 29 +-
.../net/ethernet/microchip/vcap/vcap_api.c | 762 +++++++++++++-----
.../net/ethernet/microchip/vcap/vcap_api.h | 5 -
.../ethernet/microchip/vcap/vcap_api_client.h | 8 +-
.../microchip/vcap/vcap_api_debugfs.c | 57 +-
.../microchip/vcap/vcap_api_debugfs_kunit.c | 10 +-
.../ethernet/microchip/vcap/vcap_api_kunit.c | 32 +-
.../microchip/vcap/vcap_api_private.h | 12 +-
16 files changed, 694 insertions(+), 350 deletions(-)