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sfc: handle XDP_TX outcomes of XDP eBPF programs

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Provide an ndo_xdp_xmit function that uses the XDP tx queue for this
CPU to send the packet.

Signed-off-by: Charles McLachlan <cmclachlan@solarflare.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Charles McLachlan
2019-10-31 10:24:12 +00:00
committed by David S. Miller
parent 3990a8fffb
commit dfe44c1f52
4 changed files with 116 additions and 1 deletions
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14
drivers/net/ethernet/sfc/efx.c
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@@ -228,6 +228,8 @@ static void efx_start_all(struct efx_nic *efx);
static void efx_stop_all(struct efx_nic *efx);
static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog);
static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp);
static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
u32 flags);
#define EFX_ASSERT_RESET_SERIALISED(efx) \
do { \
@@ -2633,6 +2635,7 @@ static const struct net_device_ops efx_netdev_ops = {
#endif
.ndo_udp_tunnel_add = efx_udp_tunnel_add,
.ndo_udp_tunnel_del = efx_udp_tunnel_del,
.ndo_xdp_xmit = efx_xdp_xmit,
.ndo_bpf = efx_xdp
};
@@ -2680,6 +2683,17 @@ static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp)
}
}
static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
u32 flags)
{
struct efx_nic *efx = netdev_priv(dev);
if (!netif_running(dev))
return -EINVAL;
return efx_xdp_tx_buffers(efx, n, xdpfs, flags & XDP_XMIT_FLUSH);
}
static void efx_update_name(struct efx_nic *efx)
{
strcpy(efx->name, efx->net_dev->name);