From b637ac5db0d0fd00cbe88469999ba2985355ac95 Mon Sep 17 00:00:00 2001 From: Eli Cohen Date: Tue, 3 Jan 2023 09:37:23 +0200 Subject: net/mlx5: Use one completion vector if eth is disabled If eth is disabled by devlink, use only a single completion vector to have minimum performance of all users of completion vectors. This also affects Infiniband performance. The rest of the vectors can be used by other consumers on a first come first served basis. mlx5_vdpa will make use of this to allocate dedicated vectors for its own use. Signed-off-by: Eli Cohen Reviewed-by: Shay Drory Signed-off-by: Saeed Mahameed Reviewed-by: Jacob Keller --- drivers/net/ethernet/mellanox/mlx5/core/eq.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/net/ethernet/mellanox/mlx5/core/eq.c') diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c index 66696c935cc5..eb41f0abf798 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c @@ -1120,6 +1120,13 @@ static int get_num_eqs(struct mlx5_core_dev *dev) int max_eqs_sf; int num_eqs; + /* If ethernet is disabled we use just a single completion vector to + * have the other vectors available for other drivers using mlx5_core. For + * example, mlx5_vdpa + */ + if (!mlx5_core_is_eth_enabled(dev) && mlx5_eth_supported(dev)) + return 1; + max_dev_eqs = MLX5_CAP_GEN(dev, max_num_eqs) ? MLX5_CAP_GEN(dev, max_num_eqs) : 1 << MLX5_CAP_GEN(dev, log_max_eq); -- cgit v1.2.3