From: Maxim Mikityanskiy Date: Wed, 26 Jan 2022 13:49:23 +0000 (+0200) Subject: net/mlx5e: Add headroom only to the first fragment in legacy RQ X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c3cce0fff3a3be0372caa4821be58fc7cefaeb3c;p=linux.git 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 --- diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index 074a44b281b64..6eda906342c05 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;