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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-or-later
set -e
TESTNAME=set_pcie_speed
declare -a PCIELINKSPEED=(
"2.5 GT/s PCIe"
"5.0 GT/s PCIe"
"8.0 GT/s PCIe"
"16.0 GT/s PCIe"
"32.0 GT/s PCIe"
"64.0 GT/s PCIe"
)
# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4
retval=0
coolingdev="$1"
statefile="$coolingdev/cur_state"
maxfile="$coolingdev/max_state"
linkspeedfile="$2"
oldstate=`cat $statefile`
maxstate=`cat $maxfile`
set_state()
{
local state=$1
local linkspeed
local expected_linkspeed
echo $state > $statefile
sleep 1
linkspeed="`cat $linkspeedfile`"
expected_linkspeed=$((maxstate-state))
expected_str="${PCIELINKSPEED[$expected_linkspeed]}"
if [ ! "${expected_str}" = "${linkspeed}" ]; then
echo "$TESTNAME failed: expected: ${expected_str}; got ${linkspeed}"
retval=1
fi
}
cleanup_skip ()
{
set_state $oldstate
exit $ksft_skip
}
trap cleanup_skip EXIT
echo "$TESTNAME: testing states $maxstate .. $oldstate with $coolingdev"
for i in $(seq $maxstate -1 $oldstate); do
set_state "$i"
done
trap EXIT
if [ $retval -eq 0 ]; then
echo "$TESTNAME [PASS]"
else
echo "$TESTNAME [FAIL]"
fi
exit $retval
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