From ef17d6064ddbc78e15b9878a09a012218970ddc2 Mon Sep 17 00:00:00 2001 From: yongari Date: Mon, 19 Dec 2011 19:00:34 +0000 Subject: TCP header size is represented by number of 32bits words. Fix the TCP header size calculation such that makes TSO engine cache all header(ethernet/IP/TCP) bytes to its internal buffer. While here, remove extra pull up for TCP payload. Unlike some em(4) controllers, fxp(4) does not require such work around for TSO. The two limitations are ethernet/IP/TCP header size should be less than or equal to the size of controller's internal buffer(80 bytes) and these header information should be found in the first fragment of a TSO frame. --- sys/dev/fxp/if_fxp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sys/dev/fxp/if_fxp.c') diff --git a/sys/dev/fxp/if_fxp.c b/sys/dev/fxp/if_fxp.c index 62c8dc2..0255b91 100644 --- a/sys/dev/fxp/if_fxp.c +++ b/sys/dev/fxp/if_fxp.c @@ -1454,7 +1454,7 @@ fxp_encap(struct fxp_softc *sc, struct mbuf **m_head) return (ENOBUFS); } tcp = (struct tcphdr *)(mtod(m, char *) + poff); - m = m_pullup(m, poff + sizeof(struct tcphdr) + tcp->th_off); + m = m_pullup(m, poff + (tcp->th_off << 2)); if (m == NULL) { *m_head = NULL; return (ENOBUFS); -- cgit v1.1