selftests: mlxsw: Add Spectrum-2 target scale for tc flower scale test

Return the maximum number of tc flower filters that can be offloaded.
Currently, this value corresponds to the number of counters supported by
the driver.

Signed-off-by: Danielle Ratson <danieller@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/drivers/net/mlxsw/spectrum-2/resource_scale.sh

@@ -20,7 +20,7 @@ cleanup()
 
 trap cleanup EXIT
 
-ALL_TESTS="mirror_gre"
+ALL_TESTS="tc_flower mirror_gre"
 for current_test in ${TESTS:-$ALL_TESTS}; do
 	source ${current_test}_scale.sh
 

tools/testing/selftests/drivers/net/mlxsw/spectrum-2/tc_flower_scale.sh

@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0
+source ../tc_flower_scale.sh
+
+tc_flower_get_target()
+{
+	local should_fail=$1; shift
+
+	# The driver associates a counter with each tc filter, which means the
+	# number of supported filters is bounded by the number of available
+	# counters.
+	# Currently, the driver supports 12K (12,288) flow counters and six of
+	# these are used for multicast routing.
+	local target=12282
+
+	if ((! should_fail)); then
+		echo $target
+	else
+		echo $((target + 1))
+	fi
+}