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nfp: add buffer drop/recycle helper for RX

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nfp_net_rx() is quite long already and about to get longer.
Move buffer drop/recycle to a helper.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2016-10-31 20:43:14 +00:00 committed by David S. Miller
parent bf187ea01b
commit e9949aebe0
1 changed files with 17 additions and 10 deletions
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27
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
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@ -1330,6 +1330,20 @@ nfp_net_parse_meta(struct net_device *netdev, struct sk_buff *skb,
return data;
}
static void
nfp_net_rx_drop(struct nfp_net_r_vector *r_vec, struct nfp_net_rx_ring *rx_ring,
struct nfp_net_rx_buf *rxbuf, struct sk_buff *skb)
{
u64_stats_update_begin(&r_vec->rx_sync);
r_vec->rx_drops++;
u64_stats_update_end(&r_vec->rx_sync);
if (rxbuf)
nfp_net_rx_give_one(rx_ring, rxbuf->skb, rxbuf->dma_addr);
if (skb)
dev_kfree_skb_any(skb);
}
/**
* nfp_net_rx() - receive up to @budget packets on @rx_ring
* @rx_ring: RX ring to receive from
@ -1372,11 +1386,8 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
new_skb = nfp_net_rx_alloc_one(rx_ring, &new_dma_addr,
nn->fl_bufsz);
if (!new_skb) {
nfp_net_rx_give_one(rx_ring, rx_ring->rxbufs[idx].skb,
rx_ring->rxbufs[idx].dma_addr);
u64_stats_update_begin(&r_vec->rx_sync);
r_vec->rx_drops++;
u64_stats_update_end(&r_vec->rx_sync);
nfp_net_rx_drop(r_vec, rx_ring, &rx_ring->rxbufs[idx],
NULL);
continue;
}
@ -1420,12 +1431,8 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
end = nfp_net_parse_meta(nn->netdev, skb, meta_len);
if (unlikely(end != skb->data)) {
u64_stats_update_begin(&r_vec->rx_sync);
r_vec->rx_drops++;
u64_stats_update_end(&r_vec->rx_sync);
dev_kfree_skb_any(skb);
nn_warn_ratelimit(nn, "invalid RX packet metadata\n");
nfp_net_rx_drop(r_vec, rx_ring, NULL, skb);
continue;
}
}