svn commit: r205532 - stable/7/sys/dev/alc

[Pyun YongHyeon]

Author: yongari
Date: Tue Mar 23 19:44:59 2010
New Revision: 205532
URL: http://svn.freebsd.org/changeset/base/205532

Log:
  MFC r204228,204230:
  r204228:
    Add TSO support on VLANs. Also make sure to update TSO capability
    whenever jumbo frame is configured.
    While I'm here remove unnecessary check of VLAN hardware checksum
    offloading. vlan(4) already takes care of this.
  
  r204230:
    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.

Modified:
  stable/7/sys/dev/alc/if_alc.c
Directory Properties:
  stable/7/sys/   (props changed)
  stable/7/sys/cddl/contrib/opensolaris/   (props changed)
  stable/7/sys/contrib/dev/acpica/   (props changed)
  stable/7/sys/contrib/pf/   (props changed)

Modified: stable/7/sys/dev/alc/if_alc.c
==============================================================================
--- stable/7/sys/dev/alc/if_alc.c	Tue Mar 23 19:41:43 2010	(r205531)
+++ stable/7/sys/dev/alc/if_alc.c	Tue Mar 23 19:44:59 2010	(r205532)
@@ -84,9 +84,6 @@ __FBSDID("$FreeBSD$");
 #else
 #define	ALC_CSUM_FEATURES	(CSUM_IP | CSUM_TCP | CSUM_UDP)
 #endif
-#ifndef	IFCAP_VLAN_HWTSO
-#define	IFCAP_VLAN_HWTSO	0
-#endif
 
 MODULE_DEPEND(alc, pci, 1, 1, 1);
 MODULE_DEPEND(alc, ether, 1, 1, 1);
@@ -756,8 +753,8 @@ alc_attach(device_t dev)
 	ether_ifattach(ifp, sc->alc_eaddr);
 
 	/* VLAN capability setup. */
-	ifp->if_capabilities |= IFCAP_VLAN_MTU;
-	ifp->if_capabilities |= IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_HWCSUM;
+	ifp->if_capabilities |= IFCAP_VLAN_MTU | IFCAP_VLAN_HWTAGGING |
+	    IFCAP_VLAN_HWCSUM | IFCAP_VLAN_HWTSO;
 	ifp->if_capenable = ifp->if_capabilities;
 	/*
 	 * XXX
@@ -1791,7 +1788,7 @@ alc_encap(struct alc_softc *sc, struct m
 	struct tcphdr *tcp;
 	bus_dma_segment_t txsegs[ALC_MAXTXSEGS];
 	bus_dmamap_t map;
-	uint32_t cflags, hdrlen, ip_off, poff, vtag;
+	uint32_t cflags, hdrlen, poff, vtag;
 	int error, idx, nsegs, prod;
 
 	ALC_LOCK_ASSERT(sc);
@@ -1801,7 +1798,7 @@ alc_encap(struct alc_softc *sc, struct m
 	m = *m_head;
 	ip = NULL;
 	tcp = NULL;
-	ip_off = poff = 0;
+	poff = 0;
 	if ((m->m_pkthdr.csum_flags & (ALC_CSUM_FEATURES | CSUM_TSO)) != 0) {
 		/*
 		 * AR8131/AR8132 requires offset of TCP/UDP header in its
@@ -1811,7 +1808,6 @@ alc_encap(struct alc_softc *sc, struct m
 		 * cycles on FreeBSD so fast host CPU is required to get
 		 * smooth TSO performance.
 		 */
-		struct ether_header *eh;
 
 		if (M_WRITABLE(m) == 0) {
 			/* Get a writable copy. */
@@ -1825,32 +1821,13 @@ alc_encap(struct alc_softc *sc, struct m
 			*m_head = m;
 		}
 
-		ip_off = sizeof(struct ether_header);
-		m = m_pullup(m, ip_off);
-		if (m == NULL) {
-			*m_head = NULL;
-			return (ENOBUFS);
-		}
-		eh = mtod(m, struct ether_header *);
-		/*
-		 * Check if hardware VLAN insertion is off.
-		 * Additional check for LLC/SNAP frame?
-		 */
-		if (eh->ether_type == htons(ETHERTYPE_VLAN)) {
-			ip_off = sizeof(struct ether_vlan_header);
-			m = m_pullup(m, ip_off);
-			if (m == NULL) {
-				*m_head = NULL;
-				return (ENOBUFS);
-			}
-		}
-		m = m_pullup(m, ip_off + sizeof(struct ip));
+		m = m_pullup(m, sizeof(struct ether_header) + sizeof(struct ip));
 		if (m == NULL) {
 			*m_head = NULL;
 			return (ENOBUFS);
 		}
-		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);
 		if ((m->m_pkthdr.csum_flags & CSUM_TSO) != 0) {
 			m = m_pullup(m, poff + sizeof(struct tcphdr));
 			if (m == NULL) {
@@ -2133,6 +2110,7 @@ alc_ioctl(struct ifnet *ifp, u_long cmd,
 			    (ifp->if_capenable & IFCAP_TSO4) != 0) {
 				ifp->if_capenable &= ~IFCAP_TSO4;
 				ifp->if_hwassist &= ~CSUM_TSO;
+				VLAN_CAPABILITIES(ifp);
 			}
 			ALC_UNLOCK(sc);
 		}
@@ -2204,14 +2182,6 @@ alc_ioctl(struct ifnet *ifp, u_long cmd,
 		if ((mask & IFCAP_VLAN_HWTSO) != 0 &&
 		    (ifp->if_capabilities & IFCAP_VLAN_HWTSO) != 0)
 			ifp->if_capenable ^= IFCAP_VLAN_HWTSO;
-		/*
-		 * VLAN hardware tagging is required to do checksum
-		 * offload or TSO on VLAN interface. Checksum offload
-		 * on VLAN interface also requires hardware checksum
-		 * offload of parent interface.
-		 */
-		if ((ifp->if_capenable & IFCAP_TXCSUM) == 0)
-			ifp->if_capenable &= ~IFCAP_VLAN_HWCSUM;
 		if ((ifp->if_capenable & IFCAP_VLAN_HWTAGGING) == 0)
 			ifp->if_capenable &=
 			    ~(IFCAP_VLAN_HWTSO | IFCAP_VLAN_HWCSUM);