From c3cce0fff3a3be0372caa4821be58fc7cefaeb3c Mon Sep 17 00:00:00 2001 From: Maxim Mikityanskiy Date: Wed, 26 Jan 2022 15:49:23 +0200 Subject: [PATCH] net/mlx5e: Add headroom only to the first fragment in legacy RQ Currently, rq->buff.headroom is applied to all fragments in legacy RQ. In the linear mode, there is a non-zero headroom, but there is only one fragment per packet. In the non-linear mode, the headroom is zero. This commit changes the logic to apply the headroom only to the first fragment. The current behavior remains the same for both linear and non-linear modes. However, it allows the next commit to enable headroom for the non-linear mode, which will be applied only to the first fragment. Signed-off-by: Maxim Mikityanskiy Reviewed-by: Tariq Toukan Signed-off-by: Saeed Mahameed --- drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index 074a44b281b6..6eda906342c0 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -373,12 +373,15 @@ static int mlx5e_alloc_rx_wqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe_cyc *wqe, int i; for (i = 0; i < rq->wqe.info.num_frags; i++, frag++) { + u16 headroom; + err = mlx5e_get_rx_frag(rq, frag); if (unlikely(err)) goto free_frags; + headroom = i == 0 ? rq->buff.headroom : 0; wqe->data[i].addr = cpu_to_be64(frag->di->addr + - frag->offset + rq->buff.headroom); + frag->offset + headroom); } return 0; -- 2.11.0