On Wed, 13 Dec 2017 15:03:33 -0800 Saeed Mahameed <sae...@mellanox.com> wrote:
> >>> @@ -707,6 +714,8 @@ static void mlx5e_free_rq(struct mlx5e_rq *rq)
> >>> if (rq->xdp_prog)
> >>> bpf_prog_put(rq->xdp_prog);
> >>>
> >>> + xdp_rxq_info_unreg(&rq->xdp_rxq);
> >>> +
> >>> switch (rq->wq_type) {
> >>> case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
> >>> mlx5e_rq_free_mpwqe_info(rq);
> >>> @@ -2768,6 +2777,11 @@ static int mlx5e_alloc_drop_rq(struct
> >>> mlx5_core_dev *mdev, if (err)
> >>> return err;
> >>>
> >>> + /* XDP RX-queue info for "Drop-RQ", packets never reach
> >>> XDP */
> >>> + xdp_rxq_info_init(&rq->xdp_rxq);
> >>> + xdp_rxq_info_type(&rq->xdp_rxq, RXQ_TYPE_SINK);
> >>> + xdp_rxq_info_reg(&rq->xdp_rxq);
> >>> +
>
> I don't see why you need this, This RQ is not even assigned to any
> netdev_rxq! it is a pure HW object that drops traffic in HW when netdev
> is down, it even has no buffers or napi handling, just ignore it's
> existence for the sake of mlx5 xdp_rxq_info reg/unreg stuff and remove
> RXQ_TYPE_SINK, bottom line it is not a real RQ and for sure XDP has
> nothing to do with it.
I need it here, because the take-down/free code-path is the same for
these two types of RQ's.
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
