Commit a8551c9b authored by Joshua Roys's avatar Joshua Roys Committed by David S. Miller
Browse files

net: mlx4: Add support for XDP_REDIRECT 



Signed-off-by: default avatarJoshua Roys <roysjosh@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e93c1e03

drivers/net/ethernet/mellanox/mlx4/en_rx.c

+13 −0
Original line number Diff line number Diff line
@@ -669,6 +669,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud 
	struct bpf_prog *xdp_prog;

	int cq_ring = cq->ring;

	bool doorbell_pending;

	bool xdp_redir_flush;

	struct mlx4_cqe *cqe;

	struct xdp_buff xdp;

	int polled = 0;
@@ -682,6 +683,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud 
	xdp_prog = rcu_dereference_bh(ring->xdp_prog);

	xdp_init_buff(&xdp, priv->frag_info[0].frag_stride, &ring->xdp_rxq);

	doorbell_pending = false;

	xdp_redir_flush = false;



	/* We assume a 1:1 mapping between CQEs and Rx descriptors, so Rx

	 * descriptor offset can be deduced from the CQE index instead of
@@ -790,6 +792,14 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud 
			switch (act) {

			case XDP_PASS:

				break;

			case XDP_REDIRECT:

				if (xdp_do_redirect(dev, &xdp, xdp_prog) >= 0) {

					xdp_redir_flush = true;

					frags[0].page = NULL;

					goto next;

				}

				trace_xdp_exception(dev, xdp_prog, act);

				goto xdp_drop_no_cnt;

			case XDP_TX:

				if (likely(!mlx4_en_xmit_frame(ring, frags, priv,

							length, cq_ring,
@@ -897,6 +907,9 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud 
			break;

	}



	if (xdp_redir_flush)

		xdp_do_flush();



	if (likely(polled)) {

		if (doorbell_pending) {

			priv->tx_cq[TX_XDP][cq_ring]->xdp_busy = true;