[net-next,v5,6/6] selftests: add ring and coalesce selftests

diff --git a/tools/testing/selftests/drivers/net/netdevsim/ethtool-coalesce.sh b/tools/testing/selftests/drivers/net/netdevsim/ethtool-coalesce.sh
new file mode 100755
index 000000000000..9adfba8f87e6
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/netdevsim/ethtool-coalesce.sh
@@ -0,0 +1,132 @@ 
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0-only
+
+source ethtool-common.sh
+
+function get_value {
+    local query="${SETTINGS_MAP[$1]}"
+
+    echo $(ethtool -c $NSIM_NETDEV | \
+        awk -F':' -v pattern="$query:" '$0 ~ pattern {gsub(/[ \t]/, "", $2); print $2}')
+}
+
+function update_current_settings {
+    for key in ${!SETTINGS_MAP[@]}; do
+        CURRENT_SETTINGS[$key]=$(get_value $key)
+    done
+    echo ${CURRENT_SETTINGS[@]}
+}
+
+if ! ethtool -h | grep -q coalesce; then
+    echo "SKIP: No --coalesce support in ethtool"
+    exit 4
+fi
+
+NSIM_NETDEV=$(make_netdev)
+
+set -o pipefail
+
+declare -A SETTINGS_MAP=(
+    ["rx-frames-low"]="rx-frame-low"
+    ["tx-frames-low"]="tx-frame-low"
+    ["rx-frames-high"]="rx-frame-high"
+    ["tx-frames-high"]="tx-frame-high"
+    ["rx-usecs"]="rx-usecs"
+    ["rx-frames"]="rx-frames"
+    ["rx-usecs-irq"]="rx-usecs-irq"
+    ["rx-frames-irq"]="rx-frames-irq"
+    ["tx-usecs"]="tx-usecs"
+    ["tx-frames"]="tx-frames"
+    ["tx-usecs-irq"]="tx-usecs-irq"
+    ["tx-frames-irq"]="tx-frames-irq"
+    ["stats-block-usecs"]="stats-block-usecs"
+    ["pkt-rate-low"]="pkt-rate-low"
+    ["rx-usecs-low"]="rx-usecs-low"
+    ["tx-usecs-low"]="tx-usecs-low"
+    ["pkt-rate-high"]="pkt-rate-high"
+    ["rx-usecs-high"]="rx-usecs-high"
+    ["tx-usecs-high"]="tx-usecs-high"
+    ["sample-interval"]="sample-interval"
+)
+
+declare -A CURRENT_SETTINGS=(
+    ["rx-frames-low"]=""
+    ["tx-frames-low"]=""
+    ["rx-frames-high"]=""
+    ["tx-frames-high"]=""
+    ["rx-usecs"]=""
+    ["rx-frames"]=""
+    ["rx-usecs-irq"]=""
+    ["rx-frames-irq"]=""
+    ["tx-usecs"]=""
+    ["tx-frames"]=""
+    ["tx-usecs-irq"]=""
+    ["tx-frames-irq"]=""
+    ["stats-block-usecs"]=""
+    ["pkt-rate-low"]=""
+    ["rx-usecs-low"]=""
+    ["tx-usecs-low"]=""
+    ["pkt-rate-high"]=""
+    ["rx-usecs-high"]=""
+    ["tx-usecs-high"]=""
+    ["sample-interval"]=""
+)
+
+declare -A EXPECTED_SETTINGS=(
+    ["rx-frames-low"]=""
+    ["tx-frames-low"]=""
+    ["rx-frames-high"]=""
+    ["tx-frames-high"]=""
+    ["rx-usecs"]=""
+    ["rx-frames"]=""
+    ["rx-usecs-irq"]=""
+    ["rx-frames-irq"]=""
+    ["tx-usecs"]=""
+    ["tx-frames"]=""
+    ["tx-usecs-irq"]=""
+    ["tx-frames-irq"]=""
+    ["stats-block-usecs"]=""
+    ["pkt-rate-low"]=""
+    ["rx-usecs-low"]=""
+    ["tx-usecs-low"]=""
+    ["pkt-rate-high"]=""
+    ["rx-usecs-high"]=""
+    ["tx-usecs-high"]=""
+    ["sample-interval"]=""
+)
+
+# populate the expected settings map
+for key in ${!SETTINGS_MAP[@]}; do
+    EXPECTED_SETTINGS[$key]=$(get_value $key)
+done
+
+# test
+for key in ${!SETTINGS_MAP[@]}; do
+    value=$((RANDOM % $((2**32-1))))
+
+    ethtool -C $NSIM_NETDEV "$key" "$value"
+
+    EXPECTED_SETTINGS[$key]="$value"
+    expected=${EXPECTED_SETTINGS[@]}
+    current=$(update_current_settings)
+
+    check $? "$current" "$expected"
+    set +x
+done
+
+# bool settings which ethtool displays on the same line
+ethtool -C $NSIM_NETDEV adaptive-rx on
+s=$(ethtool -c $NSIM_NETDEV | grep -q "Adaptive RX: on  TX: off")
+check $? "$s" ""
+
+ethtool -C $NSIM_NETDEV adaptive-tx on
+s=$(ethtool -c $NSIM_NETDEV | grep -q "Adaptive RX: on  TX: on")
+check $? "$s" ""
+
+if [ $num_errors -eq 0 ]; then
+    echo "PASSED all $((num_passes)) checks"
+    exit 0
+else
+    echo "FAILED $num_errors/$((num_errors+num_passes)) checks"
+    exit 1
+fi
diff --git a/tools/testing/selftests/drivers/net/netdevsim/ethtool-ring.sh b/tools/testing/selftests/drivers/net/netdevsim/ethtool-ring.sh
new file mode 100755
index 000000000000..c969559ffa7a
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/netdevsim/ethtool-ring.sh
@@ -0,0 +1,85 @@ 
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0-only
+
+source ethtool-common.sh
+
+function get_value {
+    local query="${SETTINGS_MAP[$1]}"
+
+    echo $(ethtool -g $NSIM_NETDEV | \
+        tail -n +$CURR_SETT_LINE | \
+        awk -F':' -v pattern="$query:" '$0 ~ pattern {gsub(/[\t ]/, "", $2); print $2}')
+}
+
+function update_current_settings {
+    for key in ${!SETTINGS_MAP[@]}; do
+        CURRENT_SETTINGS[$key]=$(get_value $key)
+    done
+    echo ${CURRENT_SETTINGS[@]}
+}
+
+if ! ethtool -h | grep -q set-ring >/dev/null; then
+    echo "SKIP: No --set-ring support in ethtool"
+    exit 4
+fi
+
+NSIM_NETDEV=$(make_netdev)
+
+set -o pipefail
+
+declare -A SETTINGS_MAP=(
+    ["rx"]="RX"
+    ["rx-mini"]="RX Mini"
+    ["rx-jumbo"]="RX Jumbo"
+    ["tx"]="TX"
+)
+
+declare -A EXPECTED_SETTINGS=(
+    ["rx"]=""
+    ["rx-mini"]=""
+    ["rx-jumbo"]=""
+    ["tx"]=""
+)
+
+declare -A CURRENT_SETTINGS=(
+    ["rx"]=""
+    ["rx-mini"]=""
+    ["rx-jumbo"]=""
+    ["tx"]=""
+)
+
+MAX_VALUE=$((RANDOM % $((2**32-1))))
+RING_MAX_LIST=$(ls $NSIM_DEV_DFS/ethtool/ring/)
+
+for ring_max_entry in $RING_MAX_LIST; do
+    echo $MAX_VALUE > $NSIM_DEV_DFS/ethtool/ring/$ring_max_entry
+done
+
+CURR_SETT_LINE=$(ethtool -g $NSIM_NETDEV | grep -i -m1 -n 'Current hardware settings' | cut -f1 -d:)
+
+# populate the expected settings map
+for key in ${!SETTINGS_MAP[@]}; do
+    EXPECTED_SETTINGS[$key]=$(get_value $key)
+done
+
+# test
+for key in ${!SETTINGS_MAP[@]}; do
+    value=$((RANDOM % $MAX_VALUE))
+
+    ethtool -G $NSIM_NETDEV "$key" "$value"
+
+    EXPECTED_SETTINGS[$key]="$value"
+    expected=${EXPECTED_SETTINGS[@]}
+    current=$(update_current_settings)
+
+    check $? "$current" "$expected"
+    set +x
+done
+
+if [ $num_errors -eq 0 ]; then
+    echo "PASSED all $((num_passes)) checks"
+    exit 0
+else
+    echo "FAILED $num_errors/$((num_errors+num_passes)) checks"
+    exit 1
+fi