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