net/mlx5e: Support RX XDP metadata

Support RX hash and timestamp metadata kfuncs. We need to pass in the cqe
pointer to the mlx5e_skb_from* functions so it can be retrieved from the
XDP ctx to do this.

Cc: Tariq Toukan <tariqt@nvidia.com>
Cc: Saeed Mahameed <saeedm@nvidia.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Anatoly Burakov <anatoly.burakov@intel.com>
Cc: Alexander Lobakin <alexandr.lobakin@intel.com>
Cc: Magnus Karlsson <magnus.karlsson@gmail.com>
Cc: Maryam Tahhan <mtahhan@redhat.com>
Cc: xdp-hints@xdp-project.net
Cc: netdev@vger.kernel.org
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://lore.kernel.org/r/20230119221536.3349901-17-sdf@google.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>

1 files changed, 28 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
index 31bb6806bf5d..f7d52b1d293b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
@@ -156,6 +156,34 @@ mlx5e_xmit_xdp_buff(struct mlx5e_xdpsq *sq, struct mlx5e_rq *rq,
 	return true;
 }
 
+static int mlx5e_xdp_rx_timestamp(const struct xdp_md *ctx, u64 *timestamp)
+{
+	const struct mlx5e_xdp_buff *_ctx = (void *)ctx;
+
+	if (unlikely(!mlx5e_rx_hw_stamp(_ctx->rq->tstamp)))
+		return -EOPNOTSUPP;
+
+	*timestamp =  mlx5e_cqe_ts_to_ns(_ctx->rq->ptp_cyc2time,
+					 _ctx->rq->clock, get_cqe_ts(_ctx->cqe));
+	return 0;
+}
+
+static int mlx5e_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash)
+{
+	const struct mlx5e_xdp_buff *_ctx = (void *)ctx;
+
+	if (unlikely(!(_ctx->xdp.rxq->dev->features & NETIF_F_RXHASH)))
+		return -EOPNOTSUPP;
+
+	*hash = be32_to_cpu(_ctx->cqe->rss_hash_result);
+	return 0;
+}
+
+const struct xdp_metadata_ops mlx5e_xdp_metadata_ops = {
+	.xmo_rx_timestamp		= mlx5e_xdp_rx_timestamp,
+	.xmo_rx_hash			= mlx5e_xdp_rx_hash,
+};
+
 /* returns true if packet was consumed by xdp */
 bool mlx5e_xdp_handle(struct mlx5e_rq *rq, struct page *page,
 		      struct bpf_prog *prog, struct mlx5e_xdp_buff *mxbuf)