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net: mlx4: Add support for XDP_REDIRECT

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Signed-off-by: Joshua Roys <roysjosh@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joshua Roys 2021-09-23 12:10:34 -04:00 committed by David S. Miller
parent e93c1e0348
commit a8551c9b75
1 changed files with 13 additions and 0 deletions
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13
drivers/net/ethernet/mellanox/mlx4/en_rx.c
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@ -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 @@ next:
break;
}
if (xdp_redir_flush)
xdp_do_flush();
if (likely(polled)) {
if (doorbell_pending) {
priv->tx_cq[TX_XDP][cq_ring]->xdp_busy = true;