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nfp: move repr handling on RX path 

Representor packets are received on PF queues with special metadata tag
for demux.  There is no reason to resolve the representor ID -> netdev
after the skb has been allocated.  Move the code, this will allow us to
handle special FW messages without SKB allocation overhead.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jakub Kicinski 2018-07-25 19:53:30 -07:00 committed by Daniel Borkmann
parent 9778cfdfc9
commit 78a8b760e4
1 changed files with 15 additions and 14 deletions
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29
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
View File

@ -1757,6 +1757,21 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
}
}
if (likely(!meta.portid)) {
netdev = dp->netdev;
} else {
struct nfp_net *nn;
nn = netdev_priv(dp->netdev);
netdev = nfp_app_repr_get(nn->app, meta.portid);
if (unlikely(!netdev)) {
nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf,
NULL);
continue;
}
nfp_repr_inc_rx_stats(netdev, pkt_len);
}
skb = build_skb(rxbuf->frag, true_bufsz);
if (unlikely(!skb)) {
nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL);
@ -1772,20 +1787,6 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr);
if (likely(!meta.portid)) {
netdev = dp->netdev;
} else {
struct nfp_net *nn;
nn = netdev_priv(dp->netdev);
netdev = nfp_app_repr_get(nn->app, meta.portid);
if (unlikely(!netdev)) {
nfp_net_rx_drop(dp, r_vec, rx_ring, NULL, skb);
continue;
}
nfp_repr_inc_rx_stats(netdev, pkt_len);
}
skb_reserve(skb, pkt_off);
skb_put(skb, pkt_len);