From: Tariq Toukan Date: Thu, 11 Jul 2019 08:20:22 +0000 (+0300) Subject: net/mlx5e: Tx, Strict the room needed for SQ edge NOPs X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=68865419ba1bf502a5bd279a500deda64000249d;p=openwrt%2Fstaging%2Fblogic.git net/mlx5e: Tx, Strict the room needed for SQ edge NOPs We use NOPs to populate the WQ fragment edge if the WQE does not fit in frag, to avoid WQEs crossing a page boundary (or wrap-around the WQ). The upper bound on the needed number of NOPs is one WQEBB less than the largest possible WQE, for otherwise the WQE would certainly fit. Signed-off-by: Tariq Toukan Signed-off-by: Saeed Mahameed --- diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h index ddfe19adb3d9..7da22b413a48 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h @@ -6,7 +6,7 @@ #include "en.h" -#define MLX5E_SQ_NOPS_ROOM MLX5_SEND_WQE_MAX_WQEBBS +#define MLX5E_SQ_NOPS_ROOM (MLX5_SEND_WQE_MAX_WQEBBS - 1) #define MLX5E_SQ_STOP_ROOM (MLX5_SEND_WQE_MAX_WQEBBS +\ MLX5E_SQ_NOPS_ROOM)