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Commit 64530739 authored by John Fastabend's avatar John Fastabend Committed by David S. Miller
Browse files

ixgbe: add initial support for xdp redirect 



There are optimizations we can add after the basic feature is
enabled. But, for now keep the patch simple.

Signed-off-by: default avatarJohn Fastabend <john.fastabend@gmail.com>
Acked-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6103aa96

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

+40 −1
Original line number Diff line number Diff line
@@ -2214,7 +2214,7 @@ static struct sk_buff *ixgbe_run_xdp(struct ixgbe_adapter *adapter, 
				     struct ixgbe_ring *rx_ring,

				     struct xdp_buff *xdp)

{

	int result = IXGBE_XDP_PASS;

	int err, result = IXGBE_XDP_PASS;

	struct bpf_prog *xdp_prog;

	u32 act;
@@ -2231,6 +2231,13 @@ static struct sk_buff *ixgbe_run_xdp(struct ixgbe_adapter *adapter, 
	case XDP_TX:

		result = ixgbe_xmit_xdp_ring(adapter, xdp);

		break;

	case XDP_REDIRECT:

		err = xdp_do_redirect(adapter->netdev, xdp);

		if (!err)

			result = IXGBE_XDP_TX;

		else

			result = IXGBE_XDP_CONSUMED;

		break;

	default:

		bpf_warn_invalid_xdp_action(act);

		/* fallthrough */
@@ -9823,6 +9830,37 @@ static int ixgbe_xdp(struct net_device *dev, struct netdev_xdp *xdp) 
	}

}



static int ixgbe_xdp_xmit(struct net_device *dev, struct xdp_buff *xdp)

{

	struct ixgbe_adapter *adapter = netdev_priv(dev);

	struct ixgbe_ring *ring;

	int err;



	if (unlikely(test_bit(__IXGBE_DOWN, &adapter->state)))

		return -EINVAL;



	/* During program transitions its possible adapter->xdp_prog is assigned

	 * but ring has not been configured yet. In this case simply abort xmit.

	 */

	ring = adapter->xdp_prog ? adapter->xdp_ring[smp_processor_id()] : NULL;

	if (unlikely(!ring))

		return -EINVAL;



	err = ixgbe_xmit_xdp_ring(adapter, xdp);

	if (err != IXGBE_XDP_TX)

		return -ENOMEM;



	/* Force memory writes to complete before letting h/w know there

	 * are new descriptors to fetch.

	 */

	wmb();



	ring = adapter->xdp_ring[smp_processor_id()];

	writel(ring->next_to_use, ring->tail);



	return 0;

}



static const struct net_device_ops ixgbe_netdev_ops = {

	.ndo_open		= ixgbe_open,

	.ndo_stop		= ixgbe_close,
@@ -9869,6 +9907,7 @@ static const struct net_device_ops ixgbe_netdev_ops = { 
	.ndo_udp_tunnel_del	= ixgbe_del_udp_tunnel_port,

	.ndo_features_check	= ixgbe_features_check,

	.ndo_xdp		= ixgbe_xdp,

	.ndo_xdp_xmit		= ixgbe_xdp_xmit,

};



/**