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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/powerpc/eeh/eeh-functions.sh | |
parent | Initial commit. (diff) | |
download | linux-430c2fc249ea5c0536abd21c23382884005c9093.tar.xz linux-430c2fc249ea5c0536abd21c23382884005c9093.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/powerpc/eeh/eeh-functions.sh')
-rwxr-xr-x | tools/testing/selftests/powerpc/eeh/eeh-functions.sh | 85 |
1 files changed, 85 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 000000000..00dc32c0e --- /dev/null +++ b/tools/testing/selftests/powerpc/eeh/eeh-functions.sh @@ -0,0 +1,85 @@ +#!/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 a driver doesn't support the error handling callbacks then the + # device is recovered by removing and re-probing it. This causes the + # sysfs directory to disappear so read the PE state once and squash + # any potential error messages + local eeh_state="$(cat $path 2>/dev/null)" + if [ -z "$eeh_state" ]; then + return 1; + fi + + local fw_state="$(echo $eeh_state | cut -d' ' -f1)" + local sw_state="$(echo $eeh_state | cut -d' ' -f2)" + + # If EEH_PE_ISOLATED or EEH_PE_RECOVERING are set then the PE is in an + # error state or being recovered. Either way, not ok. + if [ "$((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 $dev >/sys/kernel/debug/powerpc/eeh_dev_check + + # Default to a 60s timeout when waiting for a device to recover. This + # is an arbitrary default which can be overridden by setting the + # EEH_MAX_WAIT environmental variable when required. + + # The current record holder for longest recovery time is: + # "Adaptec Series 8 12G SAS/PCIe 3" at 39 seconds + max_wait=${EEH_MAX_WAIT:=60} + + 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; +} + |