diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en/params.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en/params.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/params.c b/drivers/net/ethernet/mellanox/mlx5/core/en/params.c index 38e4f19d69f8..43271a3856ca 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/params.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/params.c @@ -2,6 +2,8 @@ /* Copyright (c) 2019 Mellanox Technologies. */ #include "en/params.h" +#include "en/txrx.h" +#include "en_accel/tls_rxtx.h" static inline bool mlx5e_rx_is_xdp(struct mlx5e_params *params, struct mlx5e_xsk_param *xsk) @@ -152,3 +154,35 @@ u16 mlx5e_get_rq_headroom(struct mlx5_core_dev *mdev, return is_linear_skb ? mlx5e_get_linear_rq_headroom(params, xsk) : 0; } + +u16 mlx5e_calc_sq_stop_room(struct mlx5_core_dev *mdev, struct mlx5e_params *params) +{ + bool is_mpwqe = MLX5E_GET_PFLAG(params, MLX5E_PFLAG_SKB_TX_MPWQE); + u16 stop_room; + + stop_room = mlx5e_tls_get_stop_room(mdev, params); + stop_room += mlx5e_stop_room_for_wqe(MLX5_SEND_WQE_MAX_WQEBBS); + if (is_mpwqe) + /* A MPWQE can take up to the maximum-sized WQE + all the normal + * stop room can be taken if a new packet breaks the active + * MPWQE session and allocates its WQEs right away. + */ + stop_room += mlx5e_stop_room_for_wqe(MLX5_SEND_WQE_MAX_WQEBBS); + + return stop_room; +} + +int mlx5e_validate_params(struct mlx5e_priv *priv, struct mlx5e_params *params) +{ + size_t sq_size = 1 << params->log_sq_size; + u16 stop_room; + + stop_room = mlx5e_calc_sq_stop_room(priv->mdev, params); + if (stop_room >= sq_size) { + netdev_err(priv->netdev, "Stop room %hu is bigger than the SQ size %zu\n", + stop_room, sq_size); + return -EINVAL; + } + + return 0; +} |