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Commit cdb57ed0 authored by Jesper Dangaard Brouer's avatar Jesper Dangaard Brouer Committed by Alexei Starovoitov
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i40e: implement flush flag for ndo_xdp_xmit 



When passed the XDP_XMIT_FLUSH flag i40e_xdp_xmit now performs the
same kind of ring tail update as in i40e_xdp_flush.  The advantage is
that all the necessary checks have been performed and xdp_ring can be
updated, instead of having to perform the exact same steps/checks in
i40e_xdp_flush

Signed-off-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 42b33468

drivers/net/ethernet/intel/i40e/i40e_txrx.c

+8 −2
Original line number Diff line number Diff line
@@ -3676,6 +3676,7 @@ int i40e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames, 
	struct i40e_netdev_priv *np = netdev_priv(dev);

	unsigned int queue_index = smp_processor_id();

	struct i40e_vsi *vsi = np->vsi;

	struct i40e_ring *xdp_ring;

	int drops = 0;

	int i;
@@ -3685,20 +3686,25 @@ int i40e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames, 
	if (!i40e_enabled_xdp_vsi(vsi) || queue_index >= vsi->num_queue_pairs)

		return -ENXIO;



	if (unlikely(flags & ~XDP_XMIT_FLAGS_NONE))

	if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))

		return -EINVAL;



	xdp_ring = vsi->xdp_rings[queue_index];



	for (i = 0; i < n; i++) {

		struct xdp_frame *xdpf = frames[i];

		int err;



		err = i40e_xmit_xdp_ring(xdpf, vsi->xdp_rings[queue_index]);

		err = i40e_xmit_xdp_ring(xdpf, xdp_ring);

		if (err != I40E_XDP_TX) {

			xdp_return_frame_rx_napi(xdpf);

			drops++;

		}

	}



	if (unlikely(flags & XDP_XMIT_FLUSH))

		i40e_xdp_ring_update_tail(xdp_ring);



	return n - drops;

}