svn commit: r204149 - head/sys/net

[Pyun YongHyeon]

Author: yongari
Date: Sat Feb 20 22:47:20 2010
New Revision: 204149
URL: http://svn.freebsd.org/changeset/base/204149

Log:
  Add TSO support on VLANs. Intentionally separated IFCAP_VLAN_HWTSO
  from IFCAP_VLAN_HWTAGGING. I think some hardwares may be able to
  TSO over VLAN without VLAN hardware tagging.
  Driver changes and userland support will follow.
  
  Reviewed by:	thompsa

Modified:
  head/sys/net/if.h
  head/sys/net/if_vlan.c

Modified: head/sys/net/if.h
==============================================================================
--- head/sys/net/if.h	Sat Feb 20 22:43:12 2010	(r204148)
+++ head/sys/net/if.h	Sat Feb 20 22:47:20 2010	(r204149)
@@ -218,6 +218,7 @@ struct if_data {
 #define	IFCAP_TOE6		0x08000	/* interface can offload TCP6 */
 #define	IFCAP_VLAN_HWFILTER	0x10000 /* interface hw can filter vlan tag */
 #define	IFCAP_POLLING_NOCOUNT	0x20000 /* polling ticks cannot be fragmented */
+#define	IFCAP_VLAN_HWTSO	0x40000 /* can do IFCAP_TSO on VLANs */
 
 #define IFCAP_HWCSUM	(IFCAP_RXCSUM | IFCAP_TXCSUM)
 #define	IFCAP_TSO	(IFCAP_TSO4 | IFCAP_TSO6)

Modified: head/sys/net/if_vlan.c
==============================================================================
--- head/sys/net/if_vlan.c	Sat Feb 20 22:43:12 2010	(r204148)
+++ head/sys/net/if_vlan.c	Sat Feb 20 22:47:20 2010	(r204149)
@@ -1322,11 +1322,26 @@ vlan_capabilities(struct ifvlan *ifv)
 	if (p->if_capenable & IFCAP_VLAN_HWCSUM &&
 	    p->if_capenable & IFCAP_VLAN_HWTAGGING) {
 		ifp->if_capenable = p->if_capenable & IFCAP_HWCSUM;
-		ifp->if_hwassist = p->if_hwassist;
+		ifp->if_hwassist = p->if_hwassist & (CSUM_IP | CSUM_TCP |
+		    CSUM_UDP | CSUM_SCTP | CSUM_IP_FRAGS | CSUM_FRAGMENT);
 	} else {
 		ifp->if_capenable = 0;
 		ifp->if_hwassist = 0;
 	}
+	/*
+	 * If the parent interface can do TSO on VLANs then
+	 * propagate the hardware-assisted flag. TSO on VLANs
+	 * does not necessarily require hardware VLAN tagging.
+	 */
+	if (p->if_capabilities & IFCAP_VLAN_HWTSO)
+		ifp->if_capabilities |= p->if_capabilities & IFCAP_TSO;
+	if (p->if_capenable & IFCAP_VLAN_HWTSO) {
+		ifp->if_capenable |= p->if_capenable & IFCAP_TSO;
+		ifp->if_hwassist |= p->if_hwassist & CSUM_TSO;
+	} else {
+		ifp->if_capenable &= ~(p->if_capenable & IFCAP_TSO);
+		ifp->if_hwassist &= ~(p->if_hwassist & CSUM_TSO);
+	}
 }
 
 static void