Commit f72e2f48 authored by Danielle Ratson's avatar Danielle Ratson Committed by Jakub Kicinski
Browse files

net: selftests: Add lanes setting test 



Test that setting lanes parameter is working.

Set max speed and max lanes in the list of advertised link modes,
and then try to set max speed with the lanes below max lanes if exists
in the list.

And then, test that setting number of lanes larger than max lanes fails.

Do the above for both autoneg on and off.

$ ./ethtool_lanes.sh

TEST: 4 lanes is autonegotiated                                     [ OK ]
TEST: Lanes number larger than max width is not set                 [ OK ]
TEST: Autoneg off, 4 lanes detected during force mode               [ OK ]
TEST: Lanes number larger than max width is not set                 [ OK ]

Signed-off-by: default avatarDanielle Ratson <danieller@nvidia.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 25a96f05

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

0 → 100755
+187 −0
Original line number Diff line number Diff line 
#!/bin/bash

# SPDX-License-Identifier: GPL-2.0



lib_dir=$(dirname $0)/../../../net/forwarding



ALL_TESTS="

	autoneg

	autoneg_force_mode

"



NUM_NETIFS=2

: ${TIMEOUT:=30000} # ms

source $lib_dir/lib.sh

source $lib_dir/ethtool_lib.sh



setup_prepare()

{

	swp1=${NETIFS[p1]}

	swp2=${NETIFS[p2]}



	ip link set dev $swp1 up

	ip link set dev $swp2 up



	busywait "$TIMEOUT" wait_for_port_up ethtool $swp2

	check_err $? "ports did not come up"



	local lanes_exist=$(ethtool $swp1 | grep 'Lanes:')

	if [[ -z $lanes_exist ]]; then

		log_test "SKIP: driver does not support lanes setting"

		exit 1

	fi



	ip link set dev $swp2 down

	ip link set dev $swp1 down

}



check_lanes()

{

	local dev=$1; shift

	local lanes=$1; shift

	local max_speed=$1; shift

	local chosen_lanes



	chosen_lanes=$(ethtool $dev | grep 'Lanes:')

	chosen_lanes=${chosen_lanes#*"Lanes: "}



	((chosen_lanes == lanes))

	check_err $? "swp1 advertise $max_speed and $lanes, devs sync to $chosen_lanes"

}



check_unsupported_lanes()

{

	local dev=$1; shift

	local max_speed=$1; shift

	local max_lanes=$1; shift

	local autoneg=$1; shift

	local autoneg_str=""



	local unsupported_lanes=$((max_lanes *= 2))



	if [[ $autoneg -eq 0 ]]; then

		autoneg_str="autoneg off"

	fi



	ethtool -s $swp1 speed $max_speed lanes $unsupported_lanes $autoneg_str &> /dev/null

	check_fail $? "Unsuccessful $unsupported_lanes lanes setting was expected"

}



max_speed_and_lanes_get()

{

	local dev=$1; shift

	local arr=("$@")

	local max_lanes

	local max_speed

	local -a lanes_arr

	local -a speeds_arr

	local -a max_values



	for ((i=0; i<${#arr[@]}; i+=2)); do

		speeds_arr+=("${arr[$i]}")

		lanes_arr+=("${arr[i+1]}")

	done



	max_values+=($(get_max "${speeds_arr[@]}"))

	max_values+=($(get_max "${lanes_arr[@]}"))



	echo ${max_values[@]}

}



search_linkmode()

{

	local speed=$1; shift

	local lanes=$1; shift

	local arr=("$@")



	for ((i=0; i<${#arr[@]}; i+=2)); do

		if [[ $speed -eq ${arr[$i]} && $lanes -eq ${arr[i+1]} ]]; then

			return 1

		fi

	done

	return 0

}



autoneg()

{

	RET=0



	local lanes

	local max_speed

	local max_lanes



	local -a linkmodes_params=($(dev_linkmodes_params_get $swp1 1))

	local -a max_values=($(max_speed_and_lanes_get $swp1 "${linkmodes_params[@]}"))

	max_speed=${max_values[0]}

	max_lanes=${max_values[1]}



	lanes=$max_lanes



	while [[ $lanes -ge 1 ]]; do

		search_linkmode $max_speed $lanes "${linkmodes_params[@]}"

		if [[ $? -eq 1 ]]; then

			ethtool_set $swp1 speed $max_speed lanes $lanes

			ip link set dev $swp1 up

			ip link set dev $swp2 up

			busywait "$TIMEOUT" wait_for_port_up ethtool $swp2

			check_err $? "ports did not come up"



			check_lanes $swp1 $lanes $max_speed

			log_test "$lanes lanes is autonegotiated"

		fi

		let $((lanes /= 2))

	done



	check_unsupported_lanes $swp1 $max_speed $max_lanes 1

	log_test "Lanes number larger than max width is not set"



	ip link set dev $swp2 down

	ip link set dev $swp1 down

}



autoneg_force_mode()

{

	RET=0



	local lanes

	local max_speed

	local max_lanes



	local -a linkmodes_params=($(dev_linkmodes_params_get $swp1 1))

	local -a max_values=($(max_speed_and_lanes_get $swp1 "${linkmodes_params[@]}"))

	max_speed=${max_values[0]}

	max_lanes=${max_values[1]}



	lanes=$max_lanes



	while [[ $lanes -ge 1 ]]; do

		search_linkmode $max_speed $lanes "${linkmodes_params[@]}"

		if [[ $? -eq 1 ]]; then

			ethtool_set $swp1 speed $max_speed lanes $lanes autoneg off

			ethtool_set $swp2 speed $max_speed lanes $lanes autoneg off

			ip link set dev $swp1 up

			ip link set dev $swp2 up

			busywait "$TIMEOUT" wait_for_port_up ethtool $swp2

			check_err $? "ports did not come up"



			check_lanes $swp1 $lanes $max_speed

			log_test "Autoneg off, $lanes lanes detected during force mode"

		fi

		let $((lanes /= 2))

	done



	check_unsupported_lanes $swp1 $max_speed $max_lanes 0

	log_test "Lanes number larger than max width is not set"



	ip link set dev $swp2 down

	ip link set dev $swp1 down



	ethtool -s $swp2 autoneg on

	ethtool -s $swp1 autoneg on

}



check_ethtool_lanes_support

setup_prepare



tests_run



exit $EXIT_STATUS

tools/testing/selftests/net/forwarding/ethtool_lib.sh

+34 −0
Original line number Diff line number Diff line
@@ -22,6 +22,40 @@ ethtool_set() 
	check_err $out "error in configuration. $cmd"

}



dev_linkmodes_params_get()

{

	local dev=$1; shift

	local adver=$1; shift

	local -a linkmodes_params

	local param_count

	local arr



	if (($adver)); then

		mode="Advertised link modes"

	else

		mode="Supported link modes"

	fi



	local -a dev_linkmodes=($(dev_speeds_get $dev 1 $adver))

	for ((i=0; i<${#dev_linkmodes[@]}; i++)); do

		linkmodes_params[$i]=$(echo -e "${dev_linkmodes[$i]}" | \

			# Replaces all non numbers with spaces

			sed -e 's/[^0-9]/ /g' | \

			# Squeeze spaces in sequence to 1 space

			tr -s ' ')

		# Count how many numbers were found in the linkmode

		param_count=$(echo "${linkmodes_params[$i]}" | wc -w)

		if [[ $param_count -eq 1 ]]; then

			linkmodes_params[$i]="${linkmodes_params[$i]} 1"

		elif [[ $param_count -ge 3 ]]; then

			arr=(${linkmodes_params[$i]})

			# Take only first two params

			linkmodes_params[$i]=$(echo "${arr[@]:0:2}")

		fi

	done

	echo ${linkmodes_params[@]}

}



dev_speeds_get()

{

	local dev=$1; shift

tools/testing/selftests/net/forwarding/lib.sh

+28 −0
Original line number Diff line number Diff line
@@ -69,6 +69,15 @@ check_tc_action_hw_stats_support() 
	fi

}



check_ethtool_lanes_support()

{

	ethtool --help 2>&1| grep lanes &> /dev/null

	if [[ $? -ne 0 ]]; then

		echo "SKIP: ethtool too old; it is missing lanes support"

		exit 1

	fi

}



if [[ "$(id -u)" -ne 0 ]]; then

	echo "SKIP: need root privileges"

	exit 0
@@ -263,6 +272,20 @@ not() 
	[[ $? != 0 ]]

}



get_max()

{

	local arr=("$@")



	max=${arr[0]}

	for cur in ${arr[@]}; do

		if [[ $cur -gt $max ]]; then

			max=$cur

		fi

	done



	echo $max

}



grep_bridge_fdb()

{

	local addr=$1; shift
@@ -279,6 +302,11 @@ grep_bridge_fdb() 
	$@ | grep $addr | grep $flag "$word"

}



wait_for_port_up()

{

	"$@" | grep -q "Link detected: yes"

}



wait_for_offload()

{

	"$@" | grep -q offload