1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3#
4# Test that PCI reset works correctly by verifying that only the expected reset
5# methods are supported and that after issuing the reset the ifindex of the
6# port changes.
7
8lib_dir=$(dirname $0)/../../../net/forwarding
9
10ALL_TESTS="
11	pci_reset_test
12"
13NUM_NETIFS=1
14source $lib_dir/lib.sh
15source $lib_dir/devlink_lib.sh
16
17pci_reset_test()
18{
19	RET=0
20
21	local bus=$(echo $DEVLINK_DEV | cut -d '/' -f 1)
22	local bdf=$(echo $DEVLINK_DEV | cut -d '/' -f 2)
23
24	if [ $bus != "pci" ]; then
25		check_err 1 "devlink device is not a PCI device"
26		log_test "pci reset"
27		return
28	fi
29
30	if [ ! -f /sys/bus/pci/devices/$bdf/reset_method ]; then
31		check_err 1 "reset is not supported"
32		log_test "pci reset"
33		return
34	fi
35
36	[[ $(cat /sys/bus/pci/devices/$bdf/reset_method) == "bus" ]]
37	check_err $? "only \"bus\" reset method should be supported"
38
39	local ifindex_pre=$(ip -j link show dev $swp1 | jq '.[]["ifindex"]')
40
41	echo 1 > /sys/bus/pci/devices/$bdf/reset
42	check_err $? "reset failed"
43
44	# Wait for udev to rename newly created netdev.
45	udevadm settle
46
47	local ifindex_post=$(ip -j link show dev $swp1 | jq '.[]["ifindex"]')
48
49	[[ $ifindex_pre != $ifindex_post ]]
50	check_err $? "reset not performed"
51
52	log_test "pci reset"
53}
54
55swp1=${NETIFS[p1]}
56tests_run
57
58exit $EXIT_STATUS
59