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Commit | Line | Data |
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0a8adf58 KC |
1 | #!/bin/sh |
2 | # This validates that the kernel will load firmware out of its list of | |
3 | # firmware locations on disk. Since the user helper does similar work, | |
4 | # we reset the custom load directory to a location the user helper doesn't | |
5 | # know so we can be sure we're not accidentally testing the user helper. | |
6 | set -e | |
7 | ||
8 | modprobe test_firmware | |
9 | ||
10 | DIR=/sys/devices/virtual/misc/test_firmware | |
11 | ||
1d0fbb34 LR |
12 | # CONFIG_FW_LOADER_USER_HELPER has a sysfs class under /sys/class/firmware/ |
13 | # These days no one enables CONFIG_FW_LOADER_USER_HELPER so check for that | |
14 | # as an indicator for CONFIG_FW_LOADER_USER_HELPER. | |
15 | HAS_FW_LOADER_USER_HELPER=$(if [ -d /sys/class/firmware/ ]; then echo yes; else echo no; fi) | |
16 | ||
17 | if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then | |
18 | OLD_TIMEOUT=$(cat /sys/class/firmware/timeout) | |
19 | fi | |
20 | ||
0a8adf58 KC |
21 | OLD_FWPATH=$(cat /sys/module/firmware_class/parameters/path) |
22 | ||
23 | FWPATH=$(mktemp -d) | |
24 | FW="$FWPATH/test-firmware.bin" | |
25 | ||
26 | test_finish() | |
27 | { | |
1d0fbb34 LR |
28 | if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then |
29 | echo "$OLD_TIMEOUT" >/sys/class/firmware/timeout | |
30 | fi | |
0a8adf58 KC |
31 | echo -n "$OLD_PATH" >/sys/module/firmware_class/parameters/path |
32 | rm -f "$FW" | |
33 | rmdir "$FWPATH" | |
34 | } | |
35 | ||
36 | trap "test_finish" EXIT | |
37 | ||
1d0fbb34 LR |
38 | if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then |
39 | # Turn down the timeout so failures don't take so long. | |
40 | echo 1 >/sys/class/firmware/timeout | |
41 | fi | |
42 | ||
0a8adf58 KC |
43 | # Set the kernel search path. |
44 | echo -n "$FWPATH" >/sys/module/firmware_class/parameters/path | |
45 | ||
46 | # This is an unlikely real-world firmware content. :) | |
47 | echo "ABCD0123" >"$FW" | |
48 | ||
49 | NAME=$(basename "$FW") | |
50 | ||
51 | # Request a firmware that doesn't exist, it should fail. | |
52 | echo -n "nope-$NAME" >"$DIR"/trigger_request | |
53 | if diff -q "$FW" /dev/test_firmware >/dev/null ; then | |
54 | echo "$0: firmware was not expected to match" >&2 | |
55 | exit 1 | |
56 | else | |
1d0fbb34 LR |
57 | if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then |
58 | echo "$0: timeout works" | |
59 | fi | |
0a8adf58 KC |
60 | fi |
61 | ||
62 | # This should succeed via kernel load or will fail after 1 second after | |
63 | # being handed over to the user helper, which won't find the fw either. | |
64 | if ! echo -n "$NAME" >"$DIR"/trigger_request ; then | |
65 | echo "$0: could not trigger request" >&2 | |
66 | exit 1 | |
67 | fi | |
68 | ||
69 | # Verify the contents are what we expect. | |
70 | if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then | |
71 | echo "$0: firmware was not loaded" >&2 | |
72 | exit 1 | |
73 | else | |
74 | echo "$0: filesystem loading works" | |
75 | fi | |
76 | ||
77 | exit 0 |