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Commit 37badd15 authored by Tariq Toukan's avatar Tariq Toukan Committed by David S. Miller
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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: default avatarTariq Toukan <tariqt@mellanox.com>
Reviewed-by: default avatarBoris Pismenny <borisp@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2b257a6e

drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h

+18 −0
Original line number Diff line number Diff line
@@ -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)