diff options
| author | Jesper Dangaard Brouer <brouer@redhat.com> | 2018-01-03 11:25:18 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-01-05 15:21:20 -0800 |
| commit | 0ddf543226acacfb9f521dafc6c817d5b04c7b1f (patch) | |
| tree | 7ecdc35234c261098aefc513df21dfd8354664c7 /drivers/net/ethernet/mellanox | |
| parent | aecd67b60722dd24353b0bc50e78a55b30707dcd (diff) | |
| download | linux-0ddf543226acacfb9f521dafc6c817d5b04c7b1f.tar.bz2 | |
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')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en.h | 4 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 9 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 1 |
3 files changed, 14 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h index 543060c305a0..5299310f2481 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h @@ -46,6 +46,7 @@ #include <linux/mlx5/transobj.h> #include <linux/rhashtable.h> #include <net/switchdev.h> +#include <net/xdp.h> #include "wq.h" #include "mlx5_core.h" #include "en_stats.h" @@ -571,6 +572,9 @@ struct mlx5e_rq { u32 rqn; struct mlx5_core_dev *mdev; struct mlx5_core_mkey umr_mkey; + + /* XDP read-mostly */ + struct xdp_rxq_info xdp_rxq; } ____cacheline_aligned_in_smp; struct mlx5e_channel { 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; diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index 5b499c7a698f..7b38480811d4 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -812,6 +812,7 @@ static inline int mlx5e_xdp_handle(struct mlx5e_rq *rq, xdp_set_data_meta_invalid(&xdp); xdp.data_end = xdp.data + *len; xdp.data_hard_start = va; + xdp.rxq = &rq->xdp_rxq; act = bpf_prog_run_xdp(prog, &xdp); switch (act) { |