#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright 2021-2022 NXP
REQUIRE_ISOCHRON=${REQUIRE_ISOCHRON:=yes}
REQUIRE_LINUXPTP=${REQUIRE_LINUXPTP:=yes}
# Tunables
UTC_TAI_OFFSET=37
ISOCHRON_CPU=1
if [[ "$REQUIRE_ISOCHRON" = "yes" ]]; then
# https://github.com/vladimiroltean/tsn-scripts
# WARNING: isochron versions pre-1.0 are unstable,
# always use the latest version
require_command isochron
fi
if [[ "$REQUIRE_LINUXPTP" = "yes" ]]; then
require_command phc2sys
require_command ptp4l
fi
phc2sys_start()
{
local uds_address=$1
local extra_args=""
if ! [ -z "${uds_address}" ]; then
extra_args="${extra_args} -z ${uds_address}"
fi
phc2sys_log="$(mktemp)"
chrt -f 10 phc2sys -m \
-a -rr \
--step_threshold 0.00002 \
--first_step_threshold 0.00002 \
${extra_args} \
> "${phc2sys_log}" 2>&1 &
phc2sys_pid=$!
echo "phc2sys logs to ${phc2sys_log} and has pid ${phc2sys_pid}"
sleep 1
}
phc2sys_stop()
{
{ kill ${phc2sys_pid} && wait ${phc2sys_pid}; } 2> /dev/null
rm "${phc2sys_log}" 2> /dev/null
}
# Replace space separators from interface list with underscores
if_names_to_label()
{
local if_name_list="$1"
echo "${if_name_list/ /_}"
}
ptp4l_start()
{
local if_names="$1"
local slave_only=$2
local uds_address=$3
local log="ptp4l_log_$(if_names_to_label ${if_names})"
local pid="ptp4l_pid_$(if_names_to_label ${if_names})"
local extra_args=""
for if_name in ${if_names}; do
extra_args="${extra_args} -i ${if_name}"
done
if [ "${slave_only}" = true ]; then
extra_args="${extra_args} -s"
fi
# declare dynamic variables ptp4l_log_${if_name} and ptp4l_pid_${if_name}
# as global, so that they can be referenced later
declare -g "${log}=$(mktemp)"
chrt -f 10 ptp4l -m -2 -P \
--step_threshold 0.00002 \
--first_step_threshold 0.00002 \
--tx_timestamp_timeout 100 \
--uds_address="${uds_address}" \
${extra_args} \
> "${!log}" 2>&1 &
declare -g "${pid}=$!"
echo "ptp4l for interfaces ${if_names} logs to ${!log} and has pid ${!pid}"
sleep 1
}
ptp4l_stop()
{
local if_names="$1"
local log="ptp4l_log_$(if_names_to_label ${if_names})"
local pid="ptp4l_pid_$(if_names_to_label ${if_names})"
{ kill ${!pid} && wait ${!pid}; } 2> /dev/null
rm "${!log}" 2> /dev/null
}
cpufreq_max()
{
local cpu=$1
local freq="cpu${cpu}_freq"
local governor="cpu${cpu}_governor"
# Kernel may be compiled with CONFIG_CPU_FREQ disabled
if ! [ -d /sys/bus/cpu/devices/cpu${cpu}/cpufreq ]; then
return
fi
# declare dynamic variables cpu${cpu}_freq and cpu${cpu}_governor as
# global, so they can be referenced later
declare -g "${freq}=$(cat /sys/bus/cpu/devices/cpu${cpu}/cpufreq/scaling_min_freq)"
declare -g "${governor}=$(cat /sys/bus/cpu/devices/cpu${cpu}/cpufreq/scaling_governor)"
cat /sys/bus/cpu/devices/cpu${cpu}/cpufreq/scaling_max_freq > \
/sys/bus/cpu/devices/cpu${cpu}/cpufreq/scaling_min_freq
echo -n "performance" > \
/sys/bus/cpu/devices/cpu${cpu}/cpufreq/scaling_governor
}
cpufreq_restore()
{
local cpu=$1
local freq="cpu${cpu}_freq"
local governor="cpu${cpu}_governor"
if ! [ -d /sys/bus/cpu/devices/cpu${cpu}/cpufreq ]; then
return
fi
echo "${!freq}" > /sys/bus/cpu/devices/cpu${cpu}/cpufreq/scaling_min_freq
echo -n "${!governor}" > \
/sys/bus/cpu/devices/cpu${cpu}/cpufreq/scaling_governor
}
isochron_recv_start()
{
local if_name=$1
local uds=$2
local stats_port=$3
local extra_args=$4
local pid="isochron_pid_${stats_port}"
if ! [ -z "${uds}" ]; then
extra_args="${extra_args} --unix-domain-socket ${uds}"
fi
isochron rcv \
--interface ${if_name} \
--sched-priority 98 \
--sched-fifo \
--utc-tai-offset ${UTC_TAI_OFFSET} \
--stats-port ${stats_port} \
--quiet \
${extra_args} & \
declare -g "${pid}=$!"
sleep 1
}
isochron_recv_stop()
{
local stats_port=$1
local pid="isochron_pid_${stats_port}"
{ kill ${!pid} && wait ${!pid}; } 2> /dev/null
}
isochron_do()
{
local sender_if_name=$1; shift
local receiver_if_name=$1; shift
local sender_uds=$1; shift
local receiver_uds=$1; shift
local base_time=$1; shift
local cycle_time=$1; shift
local shift_time=$1; shift
local num_pkts=$1; shift
local vid=$1; shift
local priority=$1; shift
local dst_ip=$1; shift
local isochron_dat=$1; shift
local extra_args=""
local receiver_extra_args=""
local vrf="$(master_name_get ${sender_if_name})"
local use_l2="true"
if ! [ -z "${dst_ip}" ]; then
use_l2="false"
fi
if ! [ -z "${vrf}" ]; then
dst_ip="${dst_ip}%${vrf}"
fi
if ! [ -z "${vid}" ]; then
vid="--vid=${vid}"
fi
if [ -z "${receiver_uds}" ]; then
extra_args="${extra_args} --omit-remote-sync"
fi
if ! [ -z "${shift_time}" ]; then
extra_args="${extra_args} --shift-time=${shift_time}"
fi
if [ "${use_l2}" = "true" ]; then
extra_args="${extra_args} --l2 --etype=0xdead ${vid}"
receiver_extra_args="--l2 --etype=0xdead"
else
extra_args="${extra_args} --l4 --ip-destination=${dst_ip}"
receiver_extra_args="--l4"
fi
cpufreq_max ${ISOCHRON_CPU}
isochron_recv_start "${h2}" "${receiver_uds}" 5000 "${receiver_extra_args}"
isochron send \
--interface ${sender_if_name} \
--unix-domain-socket ${sender_uds} \
--priority ${priority} \
--base-time ${base_time} \
--cycle-time ${cycle_time} \
--num-frames ${num_pkts} \
--frame-size 64 \
--txtime \
--utc-tai-offset ${UTC_TAI_OFFSET} \
--cpu-mask $((1 << ${ISOCHRON_CPU})) \
--sched-fifo \
--sched-priority 98 \
--client 127.0.0.1 \
--sync-threshold 5000 \
--output-file ${isochron_dat} \
${extra_args} \
--quiet
isochron_recv_stop 5000
cpufreq_restore ${ISOCHRON_CPU}
}
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