selftests: mlxsw: Test offloadability of root TBF

TBF can be used as a root qdisc, with the usual ETS/RED/TBF hierarchy below
it. This use should now be offloaded. Add a test that verifies that it is.

Signed-off-by: Petr Machata <[e-mail]>
Signed-off-by: Ido Schimmel <[e-mail]>
Signed-off-by: Jakub Kicinski <[e-mail]>

tools/testing/selftests/drivers/net/mlxsw/sch_offload.sh

···
 
 ALL_TESTS="
 	test_root
+	test_port_tbf
 	test_etsprio
+	test_etsprio_port_tbf
 "
 NUM_NETIFS=1
 lib_dir=$(dirname $0)/../../../net/forwarding
···
 	do_test_combinations 1 0
 }
 
+test_port_tbf()
+{
+	with_tbf 1: root \
+		do_test_combinations 8 1
+}
+
 do_test_etsprio()
 {
 	local parent=$1; shift
···
 test_etsprio()
 {
 	do_test_etsprio root ""
+}
+
+test_etsprio_port_tbf()
+{
+	with_tbf 1: root \
+		do_test_etsprio "parent 1:1" "-TBF"
 }
 
 cleanup()