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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-only
KSELFTESTS_SKIP=4
. ./eeh-functions.sh
if ! eeh_supported ; then
echo "EEH not supported on this system, skipping"
exit $KSELFTESTS_SKIP;
fi
if [ ! -e "/sys/kernel/debug/powerpc/eeh_dev_check" ] && \
[ ! -e "/sys/kernel/debug/powerpc/eeh_dev_break" ] ; then
echo "debugfs EEH testing files are missing. Is debugfs mounted?"
exit $KSELFTESTS_SKIP;
fi
pre_lspci=`mktemp`
lspci > $pre_lspci
# Bump the max freeze count to something absurd so we don't
# trip over it while breaking things.
echo 5000 > /sys/kernel/debug/powerpc/eeh_max_freezes
# record the devices that we break in here. Assuming everything
# goes to plan we should get them back once the recover process
# is finished.
devices=""
# Build up a list of candidate devices.
for dev in `ls -1 /sys/bus/pci/devices/ | grep '\.0$'` ; do
# skip bridges since we can't recover them (yet...)
if [ -e "/sys/bus/pci/devices/$dev/pci_bus" ] ; then
echo "$dev, Skipped: bridge"
continue;
fi
# Skip VFs for now since we don't have a reliable way
# to break them.
if [ -e "/sys/bus/pci/devices/$dev/physfn" ] ; then
echo "$dev, Skipped: virtfn"
continue;
fi
if [ "ahci" = "$(basename $(realpath /sys/bus/pci/devices/$dev/driver))" ] ; then
echo "$dev, Skipped: ahci doesn't support recovery"
continue
fi
# Don't inject errosr into an already-frozen PE. This happens with
# PEs that contain multiple PCI devices (e.g. multi-function cards)
# and injecting new errors during the recovery process will probably
# result in the recovery failing and the device being marked as
# failed.
if ! pe_ok $dev ; then
echo "$dev, Skipped: Bad initial PE state"
continue;
fi
echo "$dev, Added"
# Add to this list of device to check
devices="$devices $dev"
done
dev_count="$(echo $devices | wc -w)"
echo "Found ${dev_count} breakable devices..."
failed=0
for dev in $devices ; do
echo "Breaking $dev..."
if ! pe_ok $dev ; then
echo "Skipping $dev, Initial PE state is not ok"
failed="$((failed + 1))"
continue;
fi
if ! eeh_one_dev $dev ; then
failed="$((failed + 1))"
fi
done
echo "$failed devices failed to recover ($dev_count tested)"
lspci | diff -u $pre_lspci -
rm -f $pre_lspci
test "$failed" -eq 0
exit $?
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