selftests: mlxsw: Add shared buffer traffic test

Test the max shared buffer occupancy for port's pool and port's TC's (using
different types of packets).
Signed-off-by: Shalom Toledo <shalomt@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+ALL_TESTS="
+	port_pool_test
+	port_tc_ip_test
+	port_tc_arp_test
+"
+
+NUM_NETIFS=2
+source ../../../net/forwarding/lib.sh
+source ../../../net/forwarding/devlink_lib.sh
+source mlxsw_lib.sh
+
+SB_POOL_ING=0
+SB_POOL_EGR_CPU=10
+
+SB_ITC_CPU_IP=3
+SB_ITC_CPU_ARP=2
+SB_ITC=0
+
+h1_create()
+{
+	simple_if_init $h1 192.0.1.1/24
+}
+
+h1_destroy()
+{
+	simple_if_fini $h1 192.0.1.1/24
+}
+
+h2_create()
+{
+	simple_if_init $h2 192.0.1.2/24
+}
+
+h2_destroy()
+{
+	simple_if_fini $h2 192.0.1.2/24
+}
+
+sb_occ_pool_check()
+{
+	local dl_port=$1; shift
+	local pool=$1; shift
+	local exp_max_occ=$1
+	local max_occ
+	local err=0
+
+	max_occ=$(devlink sb -j occupancy show $dl_port \
+		  | jq -e ".[][][\"pool\"][\"$pool\"][\"max\"]")
+
+	if [[ "$max_occ" -ne "$exp_max_occ" ]]; then
+		err=1
+	fi
+
+	echo $max_occ
+	return $err
+}
+
+sb_occ_itc_check()
+{
+	local dl_port=$1; shift
+	local itc=$1; shift
+	local exp_max_occ=$1
+	local max_occ
+	local err=0
+
+	max_occ=$(devlink sb -j occupancy show $dl_port \
+		  | jq -e ".[][][\"itc\"][\"$itc\"][\"max\"]")
+
+	if [[ "$max_occ" -ne "$exp_max_occ" ]]; then
+		err=1
+	fi
+
+	echo $max_occ
+	return $err
+}
+
+sb_occ_etc_check()
+{
+	local dl_port=$1; shift
+	local etc=$1; shift
+	local exp_max_occ=$1; shift
+	local max_occ
+	local err=0
+
+	max_occ=$(devlink sb -j occupancy show $dl_port \
+		  | jq -e ".[][][\"etc\"][\"$etc\"][\"max\"]")
+
+	if [[ "$max_occ" -ne "$exp_max_occ" ]]; then
+		err=1
+	fi
+
+	echo $max_occ
+	return $err
+}
+
+port_pool_test()
+{
+	local exp_max_occ=288
+	local max_occ
+
+	devlink sb occupancy clearmax $DEVLINK_DEV
+
+	$MZ $h1 -c 1 -p 160 -a $h1mac -b $h2mac -A 192.0.1.1 -B 192.0.1.2 \
+		-t ip -q
+
+	devlink sb occupancy snapshot $DEVLINK_DEV
+
+	RET=0
+	max_occ=$(sb_occ_pool_check $dl_port1 $SB_POOL_ING $exp_max_occ)
+	check_err $? "Expected iPool($SB_POOL_ING) max occupancy to be $exp_max_occ, but got $max_occ"
+	log_test "physical port's($h1) ingress pool"
+
+	RET=0
+	max_occ=$(sb_occ_pool_check $dl_port2 $SB_POOL_ING $exp_max_occ)
+	check_err $? "Expected iPool($SB_POOL_ING) max occupancy to be $exp_max_occ, but got $max_occ"
+	log_test "physical port's($h2) ingress pool"
+
+	RET=0
+	max_occ=$(sb_occ_pool_check $cpu_dl_port $SB_POOL_EGR_CPU $exp_max_occ)
+	check_err $? "Expected ePool($SB_POOL_EGR_CPU) max occupancy to be $exp_max_occ, but got $max_occ"
+	log_test "CPU port's egress pool"
+}
+
+port_tc_ip_test()
+{
+	local exp_max_occ=288
+	local max_occ
+
+	devlink sb occupancy clearmax $DEVLINK_DEV
+
+	$MZ $h1 -c 1 -p 160 -a $h1mac -b $h2mac -A 192.0.1.1 -B 192.0.1.2 \
+		-t ip -q
+
+	devlink sb occupancy snapshot $DEVLINK_DEV
+
+	RET=0
+	max_occ=$(sb_occ_itc_check $dl_port2 $SB_ITC $exp_max_occ)
+	check_err $? "Expected ingress TC($SB_ITC) max occupancy to be $exp_max_occ, but got $max_occ"
+	log_test "physical port's($h1) ingress TC - IP packet"
+
+	RET=0
+	max_occ=$(sb_occ_itc_check $dl_port2 $SB_ITC $exp_max_occ)
+	check_err $? "Expected ingress TC($SB_ITC) max occupancy to be $exp_max_occ, but got $max_occ"
+	log_test "physical port's($h2) ingress TC - IP packet"
+
+	RET=0
+	max_occ=$(sb_occ_etc_check $cpu_dl_port $SB_ITC_CPU_IP $exp_max_occ)
+	check_err $? "Expected egress TC($SB_ITC_CPU_IP) max occupancy to be $exp_max_occ, but got $max_occ"
+	log_test "CPU port's egress TC - IP packet"
+}
+
+port_tc_arp_test()
+{
+	local exp_max_occ=96
+	local max_occ
+
+	if [[ $MLXSW_CHIP != "mlxsw_spectrum" ]]; then
+		exp_max_occ=144
+	fi
+
+	devlink sb occupancy clearmax $DEVLINK_DEV
+
+	$MZ $h1 -c 1 -p 160 -a $h1mac -A 192.0.1.1 -t arp -q
+
+	devlink sb occupancy snapshot $DEVLINK_DEV
+
+	RET=0
+	max_occ=$(sb_occ_itc_check $dl_port2 $SB_ITC $exp_max_occ)
+	check_err $? "Expected ingress TC($SB_ITC) max occupancy to be $exp_max_occ, but got $max_occ"
+	log_test "physical port's($h1) ingress TC - ARP packet"
+
+	RET=0
+	max_occ=$(sb_occ_itc_check $dl_port2 $SB_ITC $exp_max_occ)
+	check_err $? "Expected ingress TC($SB_ITC) max occupancy to be $exp_max_occ, but got $max_occ"
+	log_test "physical port's($h2) ingress TC - ARP packet"
+
+	RET=0
+	max_occ=$(sb_occ_etc_check $cpu_dl_port $SB_ITC_CPU_ARP $exp_max_occ)
+	check_err $? "Expected egress TC($SB_ITC_IP2ME) max occupancy to be $exp_max_occ, but got $max_occ"
+	log_test "CPU port's egress TC - ARP packet"
+}
+
+setup_prepare()
+{
+	h1=${NETIFS[p1]}
+	h2=${NETIFS[p2]}
+
+	h1mac=$(mac_get $h1)
+	h2mac=$(mac_get $h2)
+
+	dl_port1=$(devlink_port_by_netdev $h1)
+	dl_port2=$(devlink_port_by_netdev $h2)
+
+	cpu_dl_port=$(devlink_cpu_port_get)
+
+	vrf_prepare
+
+	h1_create
+	h2_create
+}
+
+cleanup()
+{
+	pre_cleanup
+
+	h2_destroy
+	h1_destroy
+
+	vrf_cleanup
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS