diff --git a/tools/testing/selftests/drivers/net/mlxsw/mlxsw_lib.sh b/tools/testing/selftests/drivers/net/mlxsw/mlxsw_lib.sh
index a95856aafd2ab..6369927e9c378 100644
--- a/tools/testing/selftests/drivers/net/mlxsw/mlxsw_lib.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/mlxsw_lib.sh
@@ -61,3 +61,17 @@ mlxsw_only_on_spectrum()
 
 	return 1
 }
+
+mlxsw_max_descriptors_get()
+{
+	local spectrum_rev=$MLXSW_SPECTRUM_REV
+
+	case $spectrum_rev in
+	1) echo 81920 ;;
+	2) echo 136960 ;;
+	3) echo 204800 ;;
+	4) echo 220000 ;;
+	*) echo "Unknown max descriptors for chip revision." > /dev/stderr
+	   return 1 ;;
+	esac
+}
diff --git a/tools/testing/selftests/drivers/net/mlxsw/qos_burst.sh b/tools/testing/selftests/drivers/net/mlxsw/qos_burst.sh
deleted file mode 100755
index 82a47b903f928..0000000000000
--- a/tools/testing/selftests/drivers/net/mlxsw/qos_burst.sh
+++ /dev/null
@@ -1,480 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: GPL-2.0
-#
-# This test sends 1Gbps of traffic through the switch, into which it then
-# injects a burst of traffic and tests that there are no drops.
-#
-# The 1Gbps stream is created by sending >1Gbps stream from H1. This stream
-# ingresses through $swp1, and is forwarded thtrough a small temporary pool to a
-# 1Gbps $swp3.
-#
-# Thus a 1Gbps stream enters $swp4, and is forwarded through a large pool to
-# $swp2, and eventually to H2. Since $swp2 is a 1Gbps port as well, no backlog
-# is generated.
-#
-# At this point, a burst of traffic is forwarded from H3. This enters $swp5, is
-# forwarded to $swp2, which is fully subscribed by the 1Gbps stream. The
-# expectation is that the burst is wholly absorbed by the large pool and no
-# drops are caused. After the burst, there should be a backlog that is hard to
-# get rid of, because $sw2 is fully subscribed. But because each individual
-# packet is scheduled soon after getting enqueued, SLL and HLL do not impact the
-# test.
-#
-# +-----------------------+                           +-----------------------+
-# | H1                    |			      | H3                    |
-# |   + $h1.111           |			      |          $h3.111 +    |
-# |   | 192.0.2.33/28     |			      |    192.0.2.35/28 |    |
-# |   |                   |			      |                  |    |
-# |   + $h1               |			      |              $h3 +    |
-# +---|-------------------+  +--------------------+   +------------------|----+
-#     |                      |                    |       		 |
-# +---|----------------------|--------------------|----------------------|----+
-# |   + $swp1          $swp3 +                    + $swp4          $swp5 |    |
-# |   | iPOOL1        iPOOL0 |                    | iPOOL2        iPOOL2 |    |
-# |   | ePOOL4        ePOOL5 |                    | ePOOL4        ePOOL4 |    |
-# |   |                1Gbps |                    | 1Gbps                |    |
-# | +-|----------------------|-+                +-|----------------------|-+  |
-# | | + $swp1.111  $swp3.111 + |                | + $swp4.111  $swp5.111 + |  |
-# | |                          |                |                          |  |
-# | | BR1                      |                | BR2                      |  |
-# | |                          |                |                          |  |
-# | |                          |                |         + $swp2.111      |  |
-# | +--------------------------+                +---------|----------------+  |
-# |                                                       |                   |
-# | iPOOL0: 500KB dynamic                                 |                   |
-# | iPOOL1: 500KB dynamic                                 |                   |
-# | iPOOL2: 10MB dynamic                                  + $swp2             |
-# | ePOOL4: 500KB dynamic                                 | iPOOL0            |
-# | ePOOL5: 500KB dnamic                                  | ePOOL6            |
-# | ePOOL6: 10MB dynamic                                  | 1Gbps             |
-# +-------------------------------------------------------|-------------------+
-#                                                         |
-#                                                     +---|-------------------+
-#                                                     |   + $h2            H2 |
-#                                                     |   | 1Gbps             |
-#                                                     |   |                   |
-#                                                     |   + $h2.111           |
-#                                                     |     192.0.2.34/28     |
-#                                                     +-----------------------+
-#
-# iPOOL0+ePOOL4 are helper pools for control traffic etc.
-# iPOOL1+ePOOL5 are helper pools for modeling the 1Gbps stream
-# iPOOL2+ePOOL6 are pools for soaking the burst traffic
-
-ALL_TESTS="
-	ping_ipv4
-	test_8K
-	test_800
-"
-
-lib_dir=$(dirname $0)/../../../net/forwarding
-
-NUM_NETIFS=8
-source $lib_dir/lib.sh
-source $lib_dir/devlink_lib.sh
-source qos_lib.sh
-source mlxsw_lib.sh
-
-_1KB=1000
-_500KB=$((500 * _1KB))
-_1MB=$((1000 * _1KB))
-
-# The failure mode that this specifically tests is exhaustion of descriptor
-# buffer. The point is to produce a burst that shared buffer should be able
-# to accommodate, but produce it with small enough packets that the machine
-# runs out of the descriptor buffer space with default configuration.
-#
-# The machine therefore needs to be able to produce line rate with as small
-# packets as possible, and at the same time have large enough buffer that
-# when filled with these small packets, it runs out of descriptors.
-# Spectrum-2 is very close, but cannot perform this test. Therefore use
-# Spectrum-3 as a minimum, and permit larger burst size, and therefore
-# larger packets, to reduce spurious failures.
-#
-mlxsw_only_on_spectrum 3+ || exit
-
-BURST_SIZE=$((50000000))
-POOL_SIZE=$BURST_SIZE
-
-h1_create()
-{
-	simple_if_init $h1
-	mtu_set $h1 10000
-
-	vlan_create $h1 111 v$h1 192.0.2.33/28
-	ip link set dev $h1.111 type vlan egress-qos-map 0:1
-}
-
-h1_destroy()
-{
-	vlan_destroy $h1 111
-
-	mtu_restore $h1
-	simple_if_fini $h1
-}
-
-h2_create()
-{
-	simple_if_init $h2
-	mtu_set $h2 10000
-	ethtool -s $h2 speed 1000 autoneg off
-
-	vlan_create $h2 111 v$h2 192.0.2.34/28
-}
-
-h2_destroy()
-{
-	vlan_destroy $h2 111
-
-	ethtool -s $h2 autoneg on
-	mtu_restore $h2
-	simple_if_fini $h2
-}
-
-h3_create()
-{
-	simple_if_init $h3
-	mtu_set $h3 10000
-
-	vlan_create $h3 111 v$h3 192.0.2.35/28
-}
-
-h3_destroy()
-{
-	vlan_destroy $h3 111
-
-	mtu_restore $h3
-	simple_if_fini $h3
-}
-
-switch_create()
-{
-	# pools
-	# -----
-
-	devlink_pool_size_thtype_save 0
-	devlink_pool_size_thtype_save 4
-	devlink_pool_size_thtype_save 1
-	devlink_pool_size_thtype_save 5
-	devlink_pool_size_thtype_save 2
-	devlink_pool_size_thtype_save 6
-
-	devlink_port_pool_th_save $swp1 1
-	devlink_port_pool_th_save $swp2 6
-	devlink_port_pool_th_save $swp3 5
-	devlink_port_pool_th_save $swp4 2
-	devlink_port_pool_th_save $swp5 2
-
-	devlink_tc_bind_pool_th_save $swp1 1 ingress
-	devlink_tc_bind_pool_th_save $swp2 1 egress
-	devlink_tc_bind_pool_th_save $swp3 1 egress
-	devlink_tc_bind_pool_th_save $swp4 1 ingress
-	devlink_tc_bind_pool_th_save $swp5 1 ingress
-
-	# Control traffic pools. Just reduce the size.
-	devlink_pool_size_thtype_set 0 dynamic $_500KB
-	devlink_pool_size_thtype_set 4 dynamic $_500KB
-
-	# Stream modeling pools.
-	devlink_pool_size_thtype_set 1 dynamic $_500KB
-	devlink_pool_size_thtype_set 5 dynamic $_500KB
-
-	# Burst soak pools.
-	devlink_pool_size_thtype_set 2 static $POOL_SIZE
-	devlink_pool_size_thtype_set 6 static $POOL_SIZE
-
-	# $swp1
-	# -----
-
-	ip link set dev $swp1 up
-	mtu_set $swp1 10000
-	vlan_create $swp1 111
-	ip link set dev $swp1.111 type vlan ingress-qos-map 0:0 1:1
-
-	devlink_port_pool_th_set $swp1 1 16
-	devlink_tc_bind_pool_th_set $swp1 1 ingress 1 16
-
-	# Configure qdisc...
-	tc qdisc replace dev $swp1 root handle 1: \
-	   ets bands 8 strict 8 priomap 7 6
-	# ... so that we can assign prio1 traffic to PG1.
-	dcb buffer set dev $swp1 prio-buffer all:0 1:1
-
-	# $swp2
-	# -----
-
-	ip link set dev $swp2 up
-	mtu_set $swp2 10000
-	ethtool -s $swp2 speed 1000 autoneg off
-	vlan_create $swp2 111
-	ip link set dev $swp2.111 type vlan egress-qos-map 0:0 1:1
-
-	devlink_port_pool_th_set $swp2 6 $POOL_SIZE
-	devlink_tc_bind_pool_th_set $swp2 1 egress 6 $POOL_SIZE
-
-	# prio 0->TC0 (band 7), 1->TC1 (band 6)
-	tc qdisc replace dev $swp2 root handle 1: \
-	   ets bands 8 strict 8 priomap 7 6
-
-	# $swp3
-	# -----
-
-	ip link set dev $swp3 up
-	mtu_set $swp3 10000
-	ethtool -s $swp3 speed 1000 autoneg off
-	vlan_create $swp3 111
-	ip link set dev $swp3.111 type vlan egress-qos-map 0:0 1:1
-
-	devlink_port_pool_th_set $swp3 5 16
-	devlink_tc_bind_pool_th_set $swp3 1 egress 5 16
-
-	# prio 0->TC0 (band 7), 1->TC1 (band 6)
-	tc qdisc replace dev $swp3 root handle 1: \
-	   ets bands 8 strict 8 priomap 7 6
-
-	# $swp4
-	# -----
-
-	ip link set dev $swp4 up
-	mtu_set $swp4 10000
-	ethtool -s $swp4 speed 1000 autoneg off
-	vlan_create $swp4 111
-	ip link set dev $swp4.111 type vlan ingress-qos-map 0:0 1:1
-
-	devlink_port_pool_th_set $swp4 2 $POOL_SIZE
-	devlink_tc_bind_pool_th_set $swp4 1 ingress 2 $POOL_SIZE
-
-	# Configure qdisc...
-	tc qdisc replace dev $swp4 root handle 1: \
-	   ets bands 8 strict 8 priomap 7 6
-	# ... so that we can assign prio1 traffic to PG1.
-	dcb buffer set dev $swp4 prio-buffer all:0 1:1
-
-	# $swp5
-	# -----
-
-	ip link set dev $swp5 up
-	mtu_set $swp5 10000
-	vlan_create $swp5 111
-	ip link set dev $swp5.111 type vlan ingress-qos-map 0:0 1:1
-
-	devlink_port_pool_th_set $swp5 2 $POOL_SIZE
-	devlink_tc_bind_pool_th_set $swp5 1 ingress 2 $POOL_SIZE
-
-	# Configure qdisc...
-	tc qdisc replace dev $swp5 root handle 1: \
-	   ets bands 8 strict 8 priomap 7 6
-	# ... so that we can assign prio1 traffic to PG1.
-	dcb buffer set dev $swp5 prio-buffer all:0 1:1
-
-	# bridges
-	# -------
-
-	ip link add name br1 type bridge vlan_filtering 0
-	ip link set dev $swp1.111 master br1
-	ip link set dev $swp3.111 master br1
-	ip link set dev br1 up
-
-	ip link add name br2 type bridge vlan_filtering 0
-	ip link set dev $swp2.111 master br2
-	ip link set dev $swp4.111 master br2
-	ip link set dev $swp5.111 master br2
-	ip link set dev br2 up
-}
-
-switch_destroy()
-{
-	# Do this first so that we can reset the limits to values that are only
-	# valid for the original static / dynamic setting.
-	devlink_pool_size_thtype_restore 6
-	devlink_pool_size_thtype_restore 5
-	devlink_pool_size_thtype_restore 4
-	devlink_pool_size_thtype_restore 2
-	devlink_pool_size_thtype_restore 1
-	devlink_pool_size_thtype_restore 0
-
-	# bridges
-	# -------
-
-	ip link set dev br2 down
-	ip link set dev $swp5.111 nomaster
-	ip link set dev $swp4.111 nomaster
-	ip link set dev $swp2.111 nomaster
-	ip link del dev br2
-
-	ip link set dev br1 down
-	ip link set dev $swp3.111 nomaster
-	ip link set dev $swp1.111 nomaster
-	ip link del dev br1
-
-	# $swp5
-	# -----
-
-	dcb buffer set dev $swp5 prio-buffer all:0
-	tc qdisc del dev $swp5 root
-
-	devlink_tc_bind_pool_th_restore $swp5 1 ingress
-	devlink_port_pool_th_restore $swp5 2
-
-	vlan_destroy $swp5 111
-	mtu_restore $swp5
-	ip link set dev $swp5 down
-
-	# $swp4
-	# -----
-
-	dcb buffer set dev $swp4 prio-buffer all:0
-	tc qdisc del dev $swp4 root
-
-	devlink_tc_bind_pool_th_restore $swp4 1 ingress
-	devlink_port_pool_th_restore $swp4 2
-
-	vlan_destroy $swp4 111
-	ethtool -s $swp4 autoneg on
-	mtu_restore $swp4
-	ip link set dev $swp4 down
-
-	# $swp3
-	# -----
-
-	tc qdisc del dev $swp3 root
-
-	devlink_tc_bind_pool_th_restore $swp3 1 egress
-	devlink_port_pool_th_restore $swp3 5
-
-	vlan_destroy $swp3 111
-	ethtool -s $swp3 autoneg on
-	mtu_restore $swp3
-	ip link set dev $swp3 down
-
-	# $swp2
-	# -----
-
-	tc qdisc del dev $swp2 root
-
-	devlink_tc_bind_pool_th_restore $swp2 1 egress
-	devlink_port_pool_th_restore $swp2 6
-
-	vlan_destroy $swp2 111
-	ethtool -s $swp2 autoneg on
-	mtu_restore $swp2
-	ip link set dev $swp2 down
-
-	# $swp1
-	# -----
-
-	dcb buffer set dev $swp1 prio-buffer all:0
-	tc qdisc del dev $swp1 root
-
-	devlink_tc_bind_pool_th_restore $swp1 1 ingress
-	devlink_port_pool_th_restore $swp1 1
-
-	vlan_destroy $swp1 111
-	mtu_restore $swp1
-	ip link set dev $swp1 down
-}
-
-setup_prepare()
-{
-	h1=${NETIFS[p1]}
-	swp1=${NETIFS[p2]}
-
-	swp2=${NETIFS[p3]}
-	h2=${NETIFS[p4]}
-
-	swp3=${NETIFS[p5]}
-	swp4=${NETIFS[p6]}
-
-	swp5=${NETIFS[p7]}
-	h3=${NETIFS[p8]}
-
-	h2mac=$(mac_get $h2)
-
-	vrf_prepare
-
-	h1_create
-	h2_create
-	h3_create
-	switch_create
-}
-
-cleanup()
-{
-	pre_cleanup
-
-	switch_destroy
-	h3_destroy
-	h2_destroy
-	h1_destroy
-
-	vrf_cleanup
-}
-
-ping_ipv4()
-{
-	ping_test $h1 192.0.2.34 " h1->h2"
-	ping_test $h3 192.0.2.34 " h3->h2"
-}
-
-__test_qos_burst()
-{
-	local pktsize=$1; shift
-
-	RET=0
-
-	start_traffic_pktsize $pktsize $h1.111 192.0.2.33 192.0.2.34 $h2mac
-	sleep 1
-
-	local q0=$(ethtool_stats_get $swp2 tc_transmit_queue_tc_1)
-	((q0 == 0))
-	check_err $? "Transmit queue non-zero?"
-
-	local d0=$(ethtool_stats_get $swp2 tc_no_buffer_discard_uc_tc_1)
-
-	local cell_size=$(devlink_cell_size_get)
-	local cells=$((BURST_SIZE / cell_size))
-	# Each packet is $pktsize of payload + headers.
-	local pkt_cells=$(((pktsize + 50 + cell_size - 1)  / cell_size))
-	# How many packets can we admit:
-	local pkts=$((cells / pkt_cells))
-
-	$MZ $h3 -p $pktsize -Q 1:111 -A 192.0.2.35 -B 192.0.2.34 \
-		-a own -b $h2mac -c $pkts -t udp -q
-	sleep 1
-
-	local d1=$(ethtool_stats_get $swp2 tc_no_buffer_discard_uc_tc_1)
-	((d1 == d0))
-	check_err $? "Drops seen on egress port: $d0 -> $d1 ($((d1 - d0)))"
-
-	# Check that the queue is somewhat close to the burst size This
-	# makes sure that the lack of drops above was not due to port
-	# undersubscribtion.
-	local q0=$(ethtool_stats_get $swp2 tc_transmit_queue_tc_1)
-	local qe=$((90 * BURST_SIZE / 100))
-	((q0 > qe))
-	check_err $? "Queue size expected >$qe, got $q0"
-
-	stop_traffic
-	sleep 2
-
-	log_test "Burst: absorb $pkts ${pktsize}-B packets"
-}
-
-test_8K()
-{
-	__test_qos_burst 8000
-}
-
-test_800()
-{
-	__test_qos_burst 800
-}
-
-bail_on_lldpad
-
-trap cleanup EXIT
-setup_prepare
-setup_wait
-tests_run
-
-exit $EXIT_STATUS
diff --git a/tools/testing/selftests/drivers/net/mlxsw/qos_ets_strict.sh b/tools/testing/selftests/drivers/net/mlxsw/qos_ets_strict.sh
index e9f8718af979a..690d8daa71b49 100755
--- a/tools/testing/selftests/drivers/net/mlxsw/qos_ets_strict.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/qos_ets_strict.sh
@@ -130,7 +130,8 @@ switch_create()
 
 	ip link set dev $swp3 up
 	mtu_set $swp3 10000
-	ethtool -s $swp3 speed 1000 autoneg off
+	tc qdisc replace dev $swp3 root handle 101: tbf rate 1gbit \
+		burst 128K limit 1G
 
 	vlan_create $swp1 111
 	vlan_create $swp2 222
@@ -193,7 +194,7 @@ switch_destroy()
 	vlan_destroy $swp2 222
 	vlan_destroy $swp1 111
 
-	ethtool -s $swp3 autoneg on
+	tc qdisc del dev $swp3 root handle 101:
 	mtu_restore $swp3
 	ip link set dev $swp3 down
 	lldptool -T -i $swp3 -V ETS-CFG up2tc=0:0,1:0,2:0,3:0,4:0,5:0,6:0,7:0
diff --git a/tools/testing/selftests/drivers/net/mlxsw/qos_max_descriptors.sh b/tools/testing/selftests/drivers/net/mlxsw/qos_max_descriptors.sh
new file mode 100755
index 0000000000000..5ac4f795e333b
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/mlxsw/qos_max_descriptors.sh
@@ -0,0 +1,282 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# This test sends many small packets (size is less than cell size) through the
+# switch. A shaper is used in $swp2, so the traffic is limited there. Packets
+# are queued till they will be sent.
+#
+# The idea is to verify that the switch can handle at least 85% of maximum
+# supported descrpitors by hardware. Then, we verify that the driver configures
+# firmware to allow infinite size of egress descriptor pool, and does not use a
+# lower limitation. Increase the size of the relevant pools such that the pool's
+# size does not limit the traffic.
+
+# +-----------------------+
+# | H1                    |
+# |   + $h1.111           |
+# |   | 192.0.2.33/28     |
+# |   |                   |
+# |   + $h1               |
+# +---|-------------------+
+#     |
+# +---|-----------------------------+
+# |   + $swp1                       |
+# |   | iPOOL1                      |
+# |   |                             |
+# | +-|------------------------+    |
+# | | + $swp1.111              |    |
+# | |                          |    |
+# | | BR1                      |    |
+# | |                          |    |
+# | | + $swp2.111              |    |
+# | +-|------------------------+    |
+# |   |                             |
+# |   + $swp2                       |
+# |   | ePOOL6                      |
+# |   | 1mbit                       |
+# +---+-----------------------------+
+#     |
+# +---|-------------------+
+# |   + $h2            H2 |
+# |   |                   |
+# |   + $h2.111           |
+# |     192.0.2.34/28     |
+# +-----------------------+
+#
+
+ALL_TESTS="
+	ping_ipv4
+	max_descriptors
+"
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+NUM_NETIFS=4
+source $lib_dir/lib.sh
+source $lib_dir/devlink_lib.sh
+source mlxsw_lib.sh
+
+MAX_POOL_SIZE=$(devlink_pool_size_get)
+SHAPER_RATE=1mbit
+
+# The current TBF qdisc interface does not allow us to configure the shaper to
+# flat zero. The ASIC shaper is guaranteed to work with a granularity of
+# 200Mbps. On Spectrum-2, writing a value close to zero instead of zero works
+# well, but the performance on Spectrum-1 is unpredictable. Thus, do not run the
+# test on Spectrum-1.
+mlxsw_only_on_spectrum 2+ || exit
+
+h1_create()
+{
+	simple_if_init $h1
+
+	vlan_create $h1 111 v$h1 192.0.2.33/28
+	ip link set dev $h1.111 type vlan egress-qos-map 0:1
+}
+
+h1_destroy()
+{
+	vlan_destroy $h1 111
+
+	simple_if_fini $h1
+}
+
+h2_create()
+{
+	simple_if_init $h2
+
+	vlan_create $h2 111 v$h2 192.0.2.34/28
+}
+
+h2_destroy()
+{
+	vlan_destroy $h2 111
+
+	simple_if_fini $h2
+}
+
+switch_create()
+{
+	# pools
+	# -----
+
+	devlink_pool_size_thtype_save 1
+	devlink_pool_size_thtype_save 6
+
+	devlink_port_pool_th_save $swp1 1
+	devlink_port_pool_th_save $swp2 6
+
+	devlink_tc_bind_pool_th_save $swp1 1 ingress
+	devlink_tc_bind_pool_th_save $swp2 1 egress
+
+	devlink_pool_size_thtype_set 1 dynamic $MAX_POOL_SIZE
+	devlink_pool_size_thtype_set 6 static $MAX_POOL_SIZE
+
+	# $swp1
+	# -----
+
+	ip link set dev $swp1 up
+	vlan_create $swp1 111
+	ip link set dev $swp1.111 type vlan ingress-qos-map 0:0 1:1
+
+	devlink_port_pool_th_set $swp1 1 16
+	devlink_tc_bind_pool_th_set $swp1 1 ingress 1 16
+
+	tc qdisc replace dev $swp1 root handle 1: \
+	   ets bands 8 strict 8 priomap 7 6
+	dcb buffer set dev $swp1 prio-buffer all:0 1:1
+
+	# $swp2
+	# -----
+
+	ip link set dev $swp2 up
+	vlan_create $swp2 111
+	ip link set dev $swp2.111 type vlan egress-qos-map 0:0 1:1
+
+	devlink_port_pool_th_set $swp2 6 $MAX_POOL_SIZE
+	devlink_tc_bind_pool_th_set $swp2 1 egress 6 $MAX_POOL_SIZE
+
+	tc qdisc replace dev $swp2 root handle 1: tbf rate $SHAPER_RATE \
+		burst 128K limit 500M
+	tc qdisc replace dev $swp2 parent 1:1 handle 11: \
+		ets bands 8 strict 8 priomap 7 6
+
+	# bridge
+	# ------
+
+	ip link add name br1 type bridge vlan_filtering 0
+	ip link set dev $swp1.111 master br1
+	ip link set dev br1 up
+
+	ip link set dev $swp2.111 master br1
+}
+
+switch_destroy()
+{
+	# Do this first so that we can reset the limits to values that are only
+	# valid for the original static / dynamic setting.
+	devlink_pool_size_thtype_restore 6
+	devlink_pool_size_thtype_restore 1
+
+	# bridge
+	# ------
+
+	ip link set dev $swp2.111 nomaster
+
+	ip link set dev br1 down
+	ip link set dev $swp1.111 nomaster
+	ip link del dev br1
+
+	# $swp2
+	# -----
+
+	tc qdisc del dev $swp2 parent 1:1 handle 11:
+	tc qdisc del dev $swp2 root
+
+	devlink_tc_bind_pool_th_restore $swp2 1 egress
+	devlink_port_pool_th_restore $swp2 6
+
+	vlan_destroy $swp2 111
+	ip link set dev $swp2 down
+
+	# $swp1
+	# -----
+
+	dcb buffer set dev $swp1 prio-buffer all:0
+	tc qdisc del dev $swp1 root
+
+	devlink_tc_bind_pool_th_restore $swp1 1 ingress
+	devlink_port_pool_th_restore $swp1 1
+
+	vlan_destroy $swp1 111
+	ip link set dev $swp1 down
+}
+
+setup_prepare()
+{
+	h1=${NETIFS[p1]}
+	swp1=${NETIFS[p2]}
+
+	swp2=${NETIFS[p3]}
+	h2=${NETIFS[p4]}
+
+	h2mac=$(mac_get $h2)
+
+	vrf_prepare
+
+	h1_create
+	h2_create
+	switch_create
+}
+
+cleanup()
+{
+	pre_cleanup
+
+	switch_destroy
+	h2_destroy
+	h1_destroy
+
+	vrf_cleanup
+}
+
+ping_ipv4()
+{
+	ping_test $h1 192.0.2.34 " h1->h2"
+}
+
+percentage_used()
+{
+	local num_packets=$1; shift
+	local max_packets=$1; shift
+
+	bc <<< "
+	    scale=2
+	    100 * $num_packets / $max_packets
+	"
+}
+
+max_descriptors()
+{
+	local cell_size=$(devlink_cell_size_get)
+	local exp_perc_used=85
+	local max_descriptors
+	local pktsize=30
+
+	RET=0
+
+	max_descriptors=$(mlxsw_max_descriptors_get) || exit 1
+
+	local d0=$(ethtool_stats_get $swp2 tc_no_buffer_discard_uc_tc_1)
+
+	log_info "Send many small packets, packet size = $pktsize bytes"
+	start_traffic_pktsize $pktsize $h1.111 192.0.2.33 192.0.2.34 $h2mac
+
+	# Sleep to wait for congestion.
+	sleep 5
+
+	local d1=$(ethtool_stats_get $swp2 tc_no_buffer_discard_uc_tc_1)
+	((d1 == d0))
+	check_err $? "Drops seen on egress port: $d0 -> $d1 ($((d1 - d0)))"
+
+	# Check how many packets the switch can handle, the limitation is
+	# maximum descriptors.
+	local pkts_bytes=$(ethtool_stats_get $swp2 tc_transmit_queue_tc_1)
+	local pkts_num=$((pkts_bytes / cell_size))
+	local perc_used=$(percentage_used $pkts_num $max_descriptors)
+
+	check_err $(bc <<< "$perc_used < $exp_perc_used") \
+		"Expected > $exp_perc_used% of descriptors, handle $perc_used%"
+
+	stop_traffic
+	sleep 1
+
+	log_test "Maximum descriptors usage. The percentage used is $perc_used%"
+}
+
+trap cleanup EXIT
+setup_prepare
+setup_wait
+tests_run
+
+exit $EXIT_STATUS
diff --git a/tools/testing/selftests/drivers/net/mlxsw/qos_mc_aware.sh b/tools/testing/selftests/drivers/net/mlxsw/qos_mc_aware.sh
index 8f164c80e2154..c8e55fa916609 100755
--- a/tools/testing/selftests/drivers/net/mlxsw/qos_mc_aware.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/qos_mc_aware.sh
@@ -129,9 +129,10 @@ switch_create()
 	vlan_create $swp2 111
 	vlan_create $swp3 111
 
-	ethtool -s $swp3 speed 1000 autoneg off
-	tc qdisc replace dev $swp3 root handle 3: \
-	   prio bands 8 priomap 7 7 7 7 7 7 7 7
+	tc qdisc replace dev $swp3 root handle 3: tbf rate 1gbit \
+		burst 128K limit 1G
+	tc qdisc replace dev $swp3 parent 3:3 handle 33: \
+		prio bands 8 priomap 7 7 7 7 7 7 7 7
 
 	ip link add name br1 type bridge vlan_filtering 0
 	ip link set dev br1 up
@@ -172,8 +173,8 @@ switch_destroy()
 	ip link del dev br111
 	ip link del dev br1
 
+	tc qdisc del dev $swp3 parent 3:3 handle 33:
 	tc qdisc del dev $swp3 root handle 3:
-	ethtool -s $swp3 autoneg on
 
 	vlan_destroy $swp3 111
 	vlan_destroy $swp2 111
diff --git a/tools/testing/selftests/drivers/net/mlxsw/sch_ets.sh b/tools/testing/selftests/drivers/net/mlxsw/sch_ets.sh
index af64bc9ea8ab7..ceaa76b17a43c 100755
--- a/tools/testing/selftests/drivers/net/mlxsw/sch_ets.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/sch_ets.sh
@@ -15,13 +15,15 @@ ALL_TESTS="
 	ets_test_dwrr
 "
 
+PARENT="parent 3:3"
+
 switch_create()
 {
-	ets_switch_create
-
 	# Create a bottleneck so that the DWRR process can kick in.
-	ethtool -s $h2 speed 1000 autoneg off
-	ethtool -s $swp2 speed 1000 autoneg off
+	tc qdisc replace dev $swp2 root handle 3: tbf rate 1gbit \
+		burst 128K limit 1G
+
+	ets_switch_create
 
 	# Set the ingress quota high and use the three egress TCs to limit the
 	# amount of traffic that is admitted to the shared buffers. This makes
@@ -55,10 +57,9 @@ switch_destroy()
 	devlink_tc_bind_pool_th_restore $swp1 0 ingress
 	devlink_port_pool_th_restore $swp1 0
 
-	ethtool -s $swp2 autoneg on
-	ethtool -s $h2 autoneg on
-
 	ets_switch_destroy
+
+	tc qdisc del dev $swp2 root handle 3:
 }
 
 # Callback from sch_ets_tests.sh
diff --git a/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh b/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
index f260f01db0e80..45b41b8f32322 100644
--- a/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
@@ -135,14 +135,16 @@ h2_create()
 	# cause packets to fail to queue up at $swp3 due to shared buffer
 	# quotas, and the test to spuriously fail.
 	#
-	# Prevent this by setting the speed of $h2 to 1Gbps.
+	# Prevent this by adding a shaper which limits the traffic in $h2 to
+	# 1Gbps.
 
-	ethtool -s $h2 speed 1000 autoneg off
+	tc qdisc replace dev $h2 root handle 10: tbf rate 1gbit \
+		burst 128K limit 1G
 }
 
 h2_destroy()
 {
-	ethtool -s $h2 autoneg on
+	tc qdisc del dev $h2 root handle 10:
 	tc qdisc del dev $h2 clsact
 	host_destroy $h2
 }
@@ -150,12 +152,10 @@ h2_destroy()
 h3_create()
 {
 	host_create $h3 3
-	ethtool -s $h3 speed 1000 autoneg off
 }
 
 h3_destroy()
 {
-	ethtool -s $h3 autoneg on
 	host_destroy $h3
 }
 
@@ -199,8 +199,9 @@ switch_create()
 		done
 	done
 
-	for intf in $swp2 $swp3 $swp4 $swp5; do
-		ethtool -s $intf speed 1000 autoneg off
+	for intf in $swp3 $swp4; do
+		tc qdisc replace dev $intf root handle 1: tbf rate 1gbit \
+			burst 128K limit 1G
 	done
 
 	ip link set dev br1_10 up
@@ -220,15 +221,13 @@ switch_destroy()
 
 	devlink_port_pool_th_restore $swp3 8
 
-	tc qdisc del dev $swp3 root 2>/dev/null
-
 	ip link set dev br2_11 down
 	ip link set dev br2_10 down
 	ip link set dev br1_11 down
 	ip link set dev br1_10 down
 
-	for intf in $swp5 $swp4 $swp3 $swp2; do
-		ethtool -s $intf autoneg on
+	for intf in $swp4 $swp3; do
+		tc qdisc del dev $intf root handle 1:
 	done
 
 	for intf in $swp5 $swp3 $swp2 $swp4 $swp1; do
@@ -536,7 +535,7 @@ do_red_test()
 	check_err $? "backlog $backlog / $limit Got $pct% marked packets, expected == 0."
 	local diff=$((limit - backlog))
 	pct=$((100 * diff / limit))
-	((0 <= pct && pct <= 10))
+	((-10 <= pct && pct <= 10))
 	check_err $? "backlog $backlog / $limit expected <= 10% distance"
 	log_test "TC $((vlan - 10)): RED backlog > limit"
 
diff --git a/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh b/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
index 7a73057206cd0..0d01c7cd82a18 100755
--- a/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
@@ -25,7 +25,7 @@ BACKLOG2=500000
 
 install_root_qdisc()
 {
-	tc qdisc add dev $swp3 root handle 10: $QDISC \
+	tc qdisc add dev $swp3 parent 1: handle 10: $QDISC \
 	   bands 8 priomap 7 6 5 4 3 2 1 0
 }
 
@@ -67,7 +67,7 @@ uninstall_qdisc_tc1()
 
 uninstall_root_qdisc()
 {
-	tc qdisc del dev $swp3 root
+	tc qdisc del dev $swp3 parent 1:
 }
 
 uninstall_qdisc()
diff --git a/tools/testing/selftests/drivers/net/mlxsw/sch_red_root.sh b/tools/testing/selftests/drivers/net/mlxsw/sch_red_root.sh
index 501d192529ac0..860205338e6fb 100755
--- a/tools/testing/selftests/drivers/net/mlxsw/sch_red_root.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/sch_red_root.sh
@@ -18,7 +18,7 @@ install_qdisc()
 {
 	local -a args=("$@")
 
-	tc qdisc add dev $swp3 root handle 108: red \
+	tc qdisc add dev $swp3 parent 1: handle 108: red \
 	   limit 1000000 min $BACKLOG max $((BACKLOG + 1)) \
 	   probability 1.0 avpkt 8000 burst 38 "${args[@]}"
 	sleep 1
@@ -26,7 +26,7 @@ install_qdisc()
 
 uninstall_qdisc()
 {
-	tc qdisc del dev $swp3 root
+	tc qdisc del dev $swp3 parent 1:
 }
 
 ecn_test()
diff --git a/tools/testing/selftests/net/forwarding/devlink_lib.sh b/tools/testing/selftests/net/forwarding/devlink_lib.sh
index de9944d42027c..601990c6881bf 100644
--- a/tools/testing/selftests/net/forwarding/devlink_lib.sh
+++ b/tools/testing/selftests/net/forwarding/devlink_lib.sh
@@ -584,3 +584,8 @@ devlink_cell_size_get()
 	devlink sb pool show "$DEVLINK_DEV" pool 0 -j \
 	    | jq '.pool[][].cell_size'
 }
+
+devlink_pool_size_get()
+{
+	devlink sb show "$DEVLINK_DEV" -j | jq '.[][][]["size"]'
+}