ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/tools/testing/selftests/powerpc/eeh/eeh-functions.sh b/marvell/linux/tools/testing/selftests/powerpc/eeh/eeh-functions.sh
new file mode 100755
index 0000000..00dc32c
--- /dev/null
+++ b/marvell/linux/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;
+}
+