- 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)

2 files changed, 20 insertions, 0 deletions

diff --git a/sys/modules/cxgbe/Makefile b/sys/modules/cxgbe/Makefile
index 1d69f76..5ec8dcc 100644
--- a/sys/modules/cxgbe/Makefile
+++ b/sys/modules/cxgbe/Makefile
@@ -4,5 +4,10 @@
 
 SUBDIR = if_cxgbe
 SUBDIR+= firmware
+SUBDIR+= ${_tom}
+
+.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
+_tom=		tom
+.endif
 
 .include <bsd.subdir.mk>
diff --git a/sys/modules/cxgbe/tom/Makefile b/sys/modules/cxgbe/tom/Makefile
new file mode 100644
index 0000000..647984d
--- /dev/null
+++ b/sys/modules/cxgbe/tom/Makefile
@@ -0,0 +1,15 @@
+#
+# $FreeBSD$
+#
+
+CXGBE = ${.CURDIR}/../../../dev/cxgbe
+.PATH: ${CXGBE}/tom
+
+KMOD = t4_tom
+SRCS = t4_tom.c t4_connect.c t4_listen.c t4_cpl_io.c t4_tom_l2t.c
+SRCS+= device_if.h bus_if.h pci_if.h
+SRCS+= opt_inet.h
+
+CFLAGS+= -I${CXGBE}
+
+.include <bsd.kmod.mk>