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author | Maxim Mikityanskiy <maximmi@nvidia.com> | 2022-01-25 12:52:51 +0200 |
---|---|---|
committer | Saeed Mahameed <saeedm@nvidia.com> | 2022-02-14 22:30:50 -0800 |
commit | 8bf30be75069d6080659de9a28565c048f6cef9b (patch) | |
tree | 15387708674cff11ec2e28da8cd778944bb5cfd9 /drivers/net/ethernet/mellanox/mlx5/core/Makefile | |
parent | net/mlx5e: Sync txq2sq updates with mlx5e_xmit for HTB queues (diff) | |
download | linux-dev-8bf30be75069d6080659de9a28565c048f6cef9b.tar.xz linux-dev-8bf30be75069d6080659de9a28565c048f6cef9b.zip |
net/mlx5e: Introduce select queue parameters
ndo_select_queue can be called at any time, and there is no way to stop
the kernel from calling it to synchronize with configuration changes
(real_num_tx_queues, num_tc). This commit introduces an internal way in
mlx5e to sync mlx5e_select_queue() with these changes. The configuration
needed by this function is stored in a struct mlx5e_selq_params, which
is modified and accessed in an atomic way using RCU methods. The whole
ndo_select_queue is called under an RCU lock, providing the necessary
guarantees.
The parameters stored in the new struct mlx5e_selq_params should only be
used from inside mlx5e_select_queue. It's the minimal set of parameters
needed for mlx5e_select_queue to do its job efficiently, derived from
parameters stored elsewhere. That means that when the configuration
change, mlx5e_selq_params may need to be updated. In such cases, the
mlx5e_selq_prepare/mlx5e_selq_apply API should be used.
struct mlx5e_selq contains two slots for the params: active and standby.
mlx5e_selq_prepare updates the standby slot, and mlx5e_selq_apply swaps
the slots in a safe atomic way using the RCU API. It integrates well
with the open/activate stages of the configuration change flow.
Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/Makefile')
-rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Makefile b/drivers/net/ethernet/mellanox/mlx5/core/Makefile index fcfd38fa9e6c..a7170ab3af97 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/Makefile +++ b/drivers/net/ethernet/mellanox/mlx5/core/Makefile @@ -28,7 +28,7 @@ mlx5_core-$(CONFIG_MLX5_CORE_EN) += en/rqt.o en/tir.o en/rss.o en/rx_res.o \ en_selftest.o en/port.o en/monitor_stats.o en/health.o \ en/reporter_tx.o en/reporter_rx.o en/params.o en/xsk/pool.o \ en/xsk/setup.o en/xsk/rx.o en/xsk/tx.o en/devlink.o en/ptp.o \ - en/qos.o en/trap.o en/fs_tt_redirect.o + en/qos.o en/trap.o en/fs_tt_redirect.o en/selq.o # # Netdev extra |