svn commit: r228716 - head/sys/dev/fxp
Pyun YongHyeon
yongari at FreeBSD.org
Mon Dec 19 19:00:34 UTC 2011
Author: yongari
Date: Mon Dec 19 19:00:34 2011
New Revision: 228716
URL: http://svn.freebsd.org/changeset/base/228716
Log:
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.
Modified:
head/sys/dev/fxp/if_fxp.c
Modified: head/sys/dev/fxp/if_fxp.c
==============================================================================
--- head/sys/dev/fxp/if_fxp.c Mon Dec 19 18:55:13 2011 (r228715)
+++ head/sys/dev/fxp/if_fxp.c Mon Dec 19 19:00:34 2011 (r228716)
@@ -1454,7 +1454,7 @@ fxp_encap(struct fxp_softc *sc, struct m
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);
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