- Updated TOE support in the kernel.

- Stateful TCP offload drivers for Terminator 3 and 4 (T3 and T4) ASICs.
  These are available as t3_tom and t4_tom modules that augment cxgb(4)
  and cxgbe(4) respectively.  The cxgb/cxgbe drivers continue to work as
  usual with or without these extra features.

- iWARP driver for Terminator 3 ASIC (kernel verbs).  T4 iWARP in the
  works and will follow soon.

Build-tested with make universe.

30s overview
============
What interfaces support TCP offload?  Look for TOE4 and/or TOE6 in the
capabilities of an interface:
# ifconfig -m | grep TOE

Enable/disable TCP offload on an interface (just like any other ifnet
capability):
# ifconfig cxgbe0 toe
# ifconfig cxgbe0 -toe

Which connections are offloaded?  Look for toe4 and/or toe6 in the
output of netstat and sockstat:
# netstat -np tcp | grep toe
# sockstat -46c | grep toe

Reviewed by:	bz, gnn
Sponsored by:	Chelsio communications.
MFC after:	~3 months (after 9.1, and after ensuring MFC is feasible)

1 files changed, 8 insertions, 2 deletions

diff --git a/sys/netinet/if_ether.h b/sys/netinet/if_ether.h
index 8d44d35..e37a964 100644
--- a/sys/netinet/if_ether.h
+++ b/sys/netinet/if_ether.h
@@ -122,8 +122,14 @@ void	arp_ifinit2(struct ifnet *, struct ifaddr *, u_char *);
 void	arp_ifscrub(struct ifnet *, uint32_t);
 
 #include <sys/eventhandler.h>
-typedef void (*llevent_arp_update_fn)(void *, struct llentry *);
-EVENTHANDLER_DECLARE(arp_update_event, llevent_arp_update_fn);
+enum {
+	LLENTRY_RESOLVED,
+	LLENTRY_TIMEDOUT,
+	LLENTRY_DELETED,
+	LLENTRY_EXPIRED,
+};
+typedef void (*lle_event_fn)(void *, struct llentry *, int);
+EVENTHANDLER_DECLARE(lle_event, lle_event_fn);
 
 #endif