diff options
Diffstat (limited to 'tools/testing/selftests/powerpc/eeh/eeh-functions.sh')
-rwxr-xr-x | tools/testing/selftests/powerpc/eeh/eeh-functions.sh | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/eeh/eeh-functions.sh b/tools/testing/selftests/powerpc/eeh/eeh-functions.sh new file mode 100755 index 000000000000..26112ab5cdf4 --- /dev/null +++ b/tools/testing/selftests/powerpc/eeh/eeh-functions.sh @@ -0,0 +1,76 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0-only + +pe_ok() { + local dev="$1" + local path="/sys/bus/pci/devices/$dev/eeh_pe_state" + + if ! [ -e "$path" ] ; then + return 1; + fi + + local fw_state="$(cut -d' ' -f1 < $path)" + local sw_state="$(cut -d' ' -f2 < $path)" + + # If EEH_PE_ISOLATED or EEH_PE_RECOVERING are set then the PE is in an + # error state or being recovered. Either way, not ok. + if [ "$((sw_state & 0x3))" -ne 0 ] ; then + return 1 + fi + + # A functioning PE should have the EEH_STATE_MMIO_ACTIVE and + # EEH_STATE_DMA_ACTIVE flags set. For some goddamn stupid reason + # the platform backends set these when the PE is in reset. The + # RECOVERING check above should stop any false positives though. + if [ "$((fw_state & 0x18))" -ne "$((0x18))" ] ; then + return 1 + fi + + return 0; +} + +eeh_supported() { + test -e /proc/powerpc/eeh && \ + grep -q 'EEH Subsystem is enabled' /proc/powerpc/eeh +} + +eeh_one_dev() { + local dev="$1" + + # Using this function from the command line is sometimes useful for + # testing so check that the argument is a well-formed sysfs device + # name. + if ! test -e /sys/bus/pci/devices/$dev/ ; then + echo "Error: '$dev' must be a sysfs device name (DDDD:BB:DD.F)" + return 1; + fi + + # Break it + echo $dev >/sys/kernel/debug/powerpc/eeh_dev_break + + # Force an EEH device check. If the kernel has already + # noticed the EEH (due to a driver poll or whatever), this + # is a no-op. + echo $dev >/sys/kernel/debug/powerpc/eeh_dev_check + + # Enforce a 30s timeout for recovery. Even the IPR, which is infamously + # slow to reset, should recover within 30s. + max_wait=30 + + for i in `seq 0 ${max_wait}` ; do + if pe_ok $dev ; then + break; + fi + echo "$dev, waited $i/${max_wait}" + sleep 1 + done + + if ! pe_ok $dev ; then + echo "$dev, Failed to recover!" + return 1; + fi + + echo "$dev, Recovered after $i seconds" + return 0; +} + |