diff options
| author | Jesper Dangaard Brouer | 2018-01-03 11:25:18 +0100 |
|---|---|---|
| committer | Alexei Starovoitov | 2018-01-06 00:21:20 +0100 |
| commit | 0ddf543226acacfb9f521dafc6c817d5b04c7b1f (patch) | |
| tree | 7ecdc35234c261098aefc513df21dfd8354664c7 /drivers/net/ethernet/mellanox/mlx5/core/en_main.c | |
| parent | xdp: base API for new XDP rx-queue info concept (diff) | |
| download | kernel-qcow2-linux-0ddf543226acacfb9f521dafc6c817d5b04c7b1f.tar.gz kernel-qcow2-linux-0ddf543226acacfb9f521dafc6c817d5b04c7b1f.tar.xz kernel-qcow2-linux-0ddf543226acacfb9f521dafc6c817d5b04c7b1f.zip | |
xdp/mlx5: setup xdp_rxq_info
The mlx5 driver have a special drop-RQ queue (one per interface) that
simply drops all incoming traffic. It helps driver keep other HW
objects (flow steering) alive upon down/up operations. It is
temporarily pointed by flow steering objects during the interface
setup, and when interface is down. It lacks many fields that are set
in a regular RQ (for example its state is never switched to
MLX5_RQC_STATE_RDY). (Thanks to Tariq Toukan for explanation).
The XDP RX-queue info for this drop-RQ marked as unused, which
allow us to use the same takedown/free code path as other RX-queues.
Driver hook points for xdp_rxq_info:
* reg : mlx5e_alloc_rq()
* unused: mlx5e_alloc_drop_rq()
* unreg : mlx5e_free_rq()
Tested on actual hardware with samples/bpf program
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Matan Barak <matanb@mellanox.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en_main.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index 3aa1c90e7c86..539bd1d24396 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -582,6 +582,9 @@ static int mlx5e_alloc_rq(struct mlx5e_channel *c, goto err_rq_wq_destroy; } + if (xdp_rxq_info_reg(&rq->xdp_rxq, rq->netdev, rq->ix) < 0) + goto err_rq_wq_destroy; + rq->buff.map_dir = rq->xdp_prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE; rq->buff.headroom = params->rq_headroom; @@ -687,6 +690,7 @@ err_destroy_umr_mkey: err_rq_wq_destroy: if (rq->xdp_prog) bpf_prog_put(rq->xdp_prog); + xdp_rxq_info_unreg(&rq->xdp_rxq); mlx5_wq_destroy(&rq->wq_ctrl); return err; @@ -699,6 +703,8 @@ 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); @@ -2766,6 +2772,9 @@ static int mlx5e_alloc_drop_rq(struct mlx5_core_dev *mdev, if (err) return err; + /* Mark as unused given "Drop-RQ" packets never reach XDP */ + xdp_rxq_info_unused(&rq->xdp_rxq); + rq->mdev = mdev; return 0; |