From 37badd159c52768e31aab2c978b9f837e4dd66bc Mon Sep 17 00:00:00 2001 From: Tariq Toukan Date: Fri, 5 Jul 2019 18:30:21 +0300 Subject: [PATCH] net/mlx5e: Introduce a fenced NOP WQE posting function Similar to the existing mlx5e_post_nop(), but marks a fence in the WQE control segment. Added as a separate new function to not hurt the performance of the common case. To be used in a downstream patch of the series. Signed-off-by: Tariq Toukan Reviewed-by: Boris Pismenny Signed-off-by: Saeed Mahameed Signed-off-by: David S. Miller --- .../net/ethernet/mellanox/mlx5/core/en/txrx.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h index af6aec717d4e..ef16f9e41cf4 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h @@ -58,6 +58,24 @@ mlx5e_post_nop(struct mlx5_wq_cyc *wq, u32 sqn, u16 *pc) return wqe; } +static inline struct mlx5e_tx_wqe * +mlx5e_post_nop_fence(struct mlx5_wq_cyc *wq, u32 sqn, u16 *pc) +{ + u16 pi = mlx5_wq_cyc_ctr2ix(wq, *pc); + struct mlx5e_tx_wqe *wqe = mlx5_wq_cyc_get_wqe(wq, pi); + struct mlx5_wqe_ctrl_seg *cseg = &wqe->ctrl; + + memset(cseg, 0, sizeof(*cseg)); + + cseg->opmod_idx_opcode = cpu_to_be32((*pc << 8) | MLX5_OPCODE_NOP); + cseg->qpn_ds = cpu_to_be32((sqn << 8) | 0x01); + cseg->fm_ce_se = MLX5_FENCE_MODE_INITIATOR_SMALL; + + (*pc)++; + + return wqe; +} + static inline void mlx5e_fill_sq_frag_edge(struct mlx5e_txqsq *sq, struct mlx5_wq_cyc *wq, u16 pi, u16 nnops) -- 2.30.2