This series optimizes ICM usage for unidirectional rules and empty matchers and with the last patch we make hardware steering the default FDB steering provider for NICs that don't support software steering. Hardware steering (HWS) uses a type of rule table container (RTC) that is unidirectional, so matchers consist of two RTCs to accommodate bidirectional rules. This small series enables resizing the two RTCs independently by tracking the number of rules separately. For extreme cases where all rules are unidirectional, this results in saving close to half the memory footprint. Results for inserting 1M unidirectional rules using a simple module: Pages Memory Before this patch: 300k 1.5GiB After this patch: 160k 900MiB The 'Pages' column measures the number of 4KiB pages the device requests for itself (the ICM). The 'Memory' column is the difference between peak usage and baseline usage (before starting the test) as reported by `free -h`. In addition, second to last patch of the series handles a case where all the matcher's rules were deleted: the large RTCs of the matcher are no longer required, and we can save some more ICM by shrinking the matcher to its initial size. Finally the last patch makes hardware steering the default mode when in swichdev for NICs that don't have software steering support. Changelog ========= Changes from v1: - Fixed author on patches 5 and 6. Changes from v2: - Added patch 4 that does only code refactoring. - Patch 5: this patch now contains the functional change only, w/o refactoring. - Patch 7: tracking flow_source in the BWC rule to resolve issue with rule_update of a unidirectional rule. - Added patch 8 that does code rearranging to prevent forward declaration in the following patch. - Patch 9: removed forward declaration of function. Moshe Shemesh (1): net/mlx5: Add HWS as secondary steering mode Vlad Dogaru (6): net/mlx5: HWS, remove unused create_dest_array parameter net/mlx5: HWS, Export rule skip logic net/mlx5: HWS, Refactor rule skip logic net/mlx5: HWS, Create STEs directly from matcher net/mlx5: HWS, Decouple matcher RX and TX sizes net/mlx5: HWS, Track matcher sizes individually Yevgeny Kliteynik (3): net/mlx5: HWS, remove incorrect comment net/mlx5: HWS, Rearrange to prevent forward declaration net/mlx5: HWS, Shrink empty matchers .../net/ethernet/mellanox/mlx5/core/fs_core.c | 2 + .../mellanox/mlx5/core/steering/hws/action.c | 7 +- .../mellanox/mlx5/core/steering/hws/bwc.c | 529 ++++++++++++------ .../mellanox/mlx5/core/steering/hws/bwc.h | 15 +- .../mellanox/mlx5/core/steering/hws/debug.c | 20 +- .../mellanox/mlx5/core/steering/hws/fs_hws.c | 15 +- .../mellanox/mlx5/core/steering/hws/matcher.c | 166 ++++-- .../mellanox/mlx5/core/steering/hws/matcher.h | 3 +- .../mellanox/mlx5/core/steering/hws/mlx5hws.h | 36 +- .../mellanox/mlx5/core/steering/hws/rule.c | 34 +- .../mellanox/mlx5/core/steering/hws/rule.h | 3 + 11 files changed, 526 insertions(+), 304 deletions(-) base-commit: 5f712c3877f99d5b5e4d011955c6467ae0e535a6 -- 2.34.1
