[bpf-next V4 PATCH 09/15] mlx5: register a memory model when XDP is enabled

From: Jesper Dangaard Brouer <brouer@redhat.com>
To: netdev@vger.kernel.org, BjörnTöpel <bjorn.topel@intel.com>,
	magnus.karlsson@intel.com
Cc: eugenia@mellanox.com, Jason Wang <jasowang@redhat.com>,
	John Fastabend <john.fastabend@gmail.com>,
	Eran Ben Elisha <eranbe@mellanox.com>,
	Saeed Mahameed <saeedm@mellanox.com>,
	galp@mellanox.com, Jesper Dangaard Brouer <brouer@redhat.com>,
	Daniel Borkmann <borkmann@iogearbox.net>,
	Alexei Starovoitov <alexei.starovoitov@gmail.com>,
	Tariq Toukan <tariqt@mellanox.com>
Subject: [bpf-next V4 PATCH 09/15] mlx5: register a memory model when XDP is enabled
Date: Thu, 22 Mar 2018 15:21:53 +0100	[thread overview]
Message-ID: <152172851384.20979.8822446808531686268.stgit@firesoul> (raw)
In-Reply-To: <152172842149.20979.12110131083451936498.stgit@firesoul>

Now all the users of ndo_xdp_xmit have been converted to use xdp_return_frame.
This enable a different memory model, thus activating another code path
in the xdp_return_frame API.

V2: Fixed issues pointed out by Tariq.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index da94c8cba5ee..2e4ca0f15b62 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -506,6 +506,14 @@ static int mlx5e_alloc_rq(struct mlx5e_channel *c,
 		rq->mkey_be = c->mkey_be;
 	}
 
+	/* This must only be activate for order-0 pages */
+	if (rq->xdp_prog) {
+		err = xdp_rxq_info_reg_mem_model(&rq->xdp_rxq,
+						 MEM_TYPE_PAGE_ORDER0, NULL);
+		if (err)
+			goto err_rq_wq_destroy;
+	}
+
 	for (i = 0; i < wq_sz; i++) {
 		struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(&rq->wq, i);
 
