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[I/OAT]: TCP recv offload to I/OAT

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Locks down user pages and sets up for DMA in tcp_recvmsg, then calls
dma_async_try_early_copy in tcp_v4_do_rcv

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Chris Leech 2006-05-23 18:05:53 -07:00 • committed by David S. Miller
parent 9593782585
commit 1a2449a87b
4 changed files with 185 additions and 22 deletions
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12
net/ipv6/tcp_ipv6.c
View file

@ -1218,8 +1218,16 @@ process:
bh_lock_sock(sk);
ret = 0;
if (!sock_owned_by_user(sk)) {
if (!tcp_prequeue(sk, skb))
ret = tcp_v6_do_rcv(sk, skb);
#ifdef CONFIG_NET_DMA
struct tcp_sock *tp = tcp_sk(sk);
if (tp->ucopy.dma_chan)
ret = tcp_v6_do_rcv(sk, skb);
else
#endif
{
if (!tcp_prequeue(sk, skb))
ret = tcp_v6_do_rcv(sk, skb);
}
} else
sk_add_backlog(sk, skb);
bh_unlock_sock(sk);