- 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)

3 files changed, 10 insertions, 9 deletions

diff --git a/sys/ofed/include/linux/net.h b/sys/ofed/include/linux/net.h
index 6e2aff3..f47acf9 100644
--- a/sys/ofed/include/linux/net.h
+++ b/sys/ofed/include/linux/net.h
@@ -48,12 +48,12 @@ sock_getname(struct socket *so, struct sockaddr *addr, int *sockaddr_len,
 	int error;
 
 	nam = NULL;
-	if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0)
-		return (-ENOTCONN);
+	if (peer) {
+		if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0)
+			return (-ENOTCONN);
 
-	if (peer)
 		error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, nam);
-	else
+	} else
 		error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, nam);
 	if (error)
 		return (-error);
diff --git a/sys/ofed/include/net/netevent.h b/sys/ofed/include/net/netevent.h
index db5b50e..c7bbc5f 100644
--- a/sys/ofed/include/net/netevent.h
+++ b/sys/ofed/include/net/netevent.h
@@ -42,7 +42,7 @@ enum netevent_notif_type {
 struct llentry;
 
 static inline void
-_handle_arp_update_event(void *arg, struct llentry *lle)
+_handle_arp_update_event(void *arg, struct llentry *lle, int evt __unused)
 {
 	struct notifier_block *nb;
 
@@ -54,7 +54,7 @@ static inline int
 register_netevent_notifier(struct notifier_block *nb)
 {
 	nb->tags[NETEVENT_NEIGH_UPDATE] = EVENTHANDLER_REGISTER(
-	    arp_update_event, _handle_arp_update_event, nb, 0);
+	    lle_event, _handle_arp_update_event, nb, 0);
 	return (0);
 }
 
@@ -62,8 +62,7 @@ static inline int
 unregister_netevent_notifier(struct notifier_block *nb)
 {
 
-	EVENTHANDLER_DEREGISTER(arp_update_event,
-	    nb->tags[NETEVENT_NEIGH_UPDATE]);
+	EVENTHANDLER_DEREGISTER(lle_event, nb->tags[NETEVENT_NEIGH_UPDATE]);
 
 	return (0);
 }
diff --git a/sys/ofed/include/rdma/iw_cm.h b/sys/ofed/include/rdma/iw_cm.h
index cbb822e..412320e 100644
--- a/sys/ofed/include/rdma/iw_cm.h
+++ b/sys/ofed/include/rdma/iw_cm.h
@@ -63,6 +63,7 @@ struct iw_cm_event {
 	void *private_data;
 	u8 private_data_len;
 	void *provider_data;
+	struct socket *so;
 };
 
 /**
@@ -98,6 +99,7 @@ struct iw_cm_id {
 	/* Used by provider to add and remove refs on IW cm_id */
 	void (*add_ref)(struct iw_cm_id *);
 	void (*rem_ref)(struct iw_cm_id *);
+	struct socket           *so;
 };
 
 struct iw_cm_conn_param {
@@ -139,7 +141,7 @@ struct iw_cm_verbs {
  *   returned IW CM identifier.
  * @context: User specified context associated with the id.
  */
-struct iw_cm_id *iw_create_cm_id(struct ib_device *device,
+struct iw_cm_id *iw_create_cm_id(struct ib_device *device, struct socket *so,
 				 iw_cm_handler cm_handler, void *context);
 
 /**