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From: Pyun YongHyeon <yongari@FreeBSD.org>
Date: Mon, 22 Feb 2010 21:03:15 +0000 (UTC)
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Subject: svn commit: r204223 - head/sys/dev/bge
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Author: yongari
Date: Mon Feb 22 21:03:15 2010
New Revision: 204223
URL: http://svn.freebsd.org/changeset/base/204223

Log:
  Remove Tx mbuf parsing code for VLAN in TSO path. Controller does
  not support TSO over VLAN if VLAN hardware tagging is disabled so
  there is no need to check VLAN here.
  While I'm here make sure to pullup IP/TCP headers in the first
  buffer.

Modified:
  head/sys/dev/bge/if_bge.c

Modified: head/sys/dev/bge/if_bge.c
==============================================================================
--- head/sys/dev/bge/if_bge.c	Mon Feb 22 21:01:08 2010	(r204222)
+++ head/sys/dev/bge/if_bge.c	Mon Feb 22 21:03:15 2010	(r204223)
@@ -3835,12 +3835,11 @@ bge_cksum_pad(struct mbuf *m)
 static struct mbuf *
 bge_setup_tso(struct bge_softc *sc, struct mbuf *m, uint16_t *mss)
 {
-	struct ether_header *eh;
 	struct ip *ip;
 	struct tcphdr *tcp;
 	struct mbuf *n;
 	uint16_t hlen;
-	uint32_t ip_off, poff;
+	uint32_t poff;
 
 	if (M_WRITABLE(m) == 0) {
 		/* Get a writable copy. */
@@ -3850,28 +3849,16 @@ bge_setup_tso(struct bge_softc *sc, stru
 			return (NULL);
 		m = n;
 	}
-	ip_off = sizeof(struct ether_header);
-	m = m_pullup(m, ip_off);
+	m = m_pullup(m, sizeof(struct ether_header) + sizeof(struct ip));
 	if (m == NULL)
 		return (NULL);
-	eh = mtod(m, struct ether_header *);
-	/* Check the existence of VLAN tag. */
-	if (eh->ether_type == htons(ETHERTYPE_VLAN)) {
-		ip_off = sizeof(struct ether_vlan_header);
-		m = m_pullup(m, ip_off);
-		if (m == NULL)
-			return (NULL);
-	}
-	m = m_pullup(m, ip_off + sizeof(struct ip));
-	if (m == NULL)
-		return (NULL);
-	ip = (struct ip *)(mtod(m, char *) + ip_off);
-	poff = ip_off + (ip->ip_hl << 2);
+	ip = (struct ip *)(mtod(m, char *) + sizeof(struct ether_header));
+	poff = sizeof(struct ether_header) + (ip->ip_hl << 2);
 	m = m_pullup(m, poff + sizeof(struct tcphdr));
 	if (m == NULL)
 		return (NULL);
 	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)
 		return (NULL);
 	/*