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 DIR=/sys/devices/virtual/misc/test_firmware 9 TEST_DIR=$(dirname $0) 10 11 test_modprobe() 12 { 13 if [ ! -d $DIR ]; then 14 echo "$0: $DIR not present" 15 echo "You must have the following enabled in your kernel:" 16 cat $TEST_DIR/config 17 exit 1 18 fi 19 } 20 21 trap "test_modprobe" EXIT 22 23 if [ ! -d $DIR ]; then 24 modprobe test_firmware 25 fi 26 27 # CONFIG_FW_LOADER_USER_HELPER has a sysfs class under /sys/class/firmware/ 28 # These days no one enables CONFIG_FW_LOADER_USER_HELPER so check for that 29 # as an indicator for CONFIG_FW_LOADER_USER_HELPER. 30 HAS_FW_LOADER_USER_HELPER=$(if [ -d /sys/class/firmware/ ]; then echo yes; else echo no; fi) 31 32 if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then 33 OLD_TIMEOUT=$(cat /sys/class/firmware/timeout) 34 fi 35 36 OLD_FWPATH=$(cat /sys/module/firmware_class/parameters/path) 37 38 FWPATH=$(mktemp -d) 39 FW="$FWPATH/test-firmware.bin" 40 41 test_finish() 42 { 43 if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then 44 echo "$OLD_TIMEOUT" >/sys/class/firmware/timeout 45 fi 46 echo -n "$OLD_PATH" >/sys/module/firmware_class/parameters/path 47 rm -f "$FW" 48 rmdir "$FWPATH" 49 } 50 51 trap "test_finish" EXIT 52 53 if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then 54 # Turn down the timeout so failures don't take so long. 55 echo 1 >/sys/class/firmware/timeout 56 fi 57 58 # Set the kernel search path. 59 echo -n "$FWPATH" >/sys/module/firmware_class/parameters/path 60 61 # This is an unlikely real-world firmware content. :) 62 echo "ABCD0123" >"$FW" 63 64 NAME=$(basename "$FW") 65 66 if printf '\000' >"$DIR"/trigger_request 2> /dev/null; then 67 echo "$0: empty filename should not succeed" >&2 68 exit 1 69 fi 70 71 if printf '\000' >"$DIR"/trigger_async_request 2> /dev/null; then 72 echo "$0: empty filename should not succeed (async)" >&2 73 exit 1 74 fi 75 76 # Request a firmware that doesn't exist, it should fail. 77 if echo -n "nope-$NAME" >"$DIR"/trigger_request 2> /dev/null; then 78 echo "$0: firmware shouldn't have loaded" >&2 79 exit 1 80 fi 81 if diff -q "$FW" /dev/test_firmware >/dev/null ; then 82 echo "$0: firmware was not expected to match" >&2 83 exit 1 84 else 85 if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then 86 echo "$0: timeout works" 87 fi 88 fi 89 90 # This should succeed via kernel load or will fail after 1 second after 91 # being handed over to the user helper, which won't find the fw either. 92 if ! echo -n "$NAME" >"$DIR"/trigger_request ; then 93 echo "$0: could not trigger request" >&2 94 exit 1 95 fi 96 97 # Verify the contents are what we expect. 98 if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then 99 echo "$0: firmware was not loaded" >&2 100 exit 1 101 else 102 echo "$0: filesystem loading works" 103 fi 104 105 # Try the asynchronous version too 106 if ! echo -n "$NAME" >"$DIR"/trigger_async_request ; then 107 echo "$0: could not trigger async request" >&2 108 exit 1 109 fi 110 111 # Verify the contents are what we expect. 112 if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then 113 echo "$0: firmware was not loaded (async)" >&2 114 exit 1 115 else 116 echo "$0: async filesystem loading works" 117 fi 118 119 exit 0 120
