tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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