meta-quanta: gbs: add detect fan fail service
When detecting fan fail, set other fans full speed
Signed-off-by: George Hung <george.hung@quantatw.com>
Change-Id: I8127a83b02f9264aba29e6d43c83c64520bb0684
diff --git a/meta-gbs/recipes-gbs/gbs-detect-fan-fail/files/gbs-detect-fan-fail.sh b/meta-gbs/recipes-gbs/gbs-detect-fan-fail/files/gbs-detect-fan-fail.sh
new file mode 100644
index 0000000..520b1c9
--- /dev/null
+++ b/meta-gbs/recipes-gbs/gbs-detect-fan-fail/files/gbs-detect-fan-fail.sh
@@ -0,0 +1,70 @@
+#!/bin/bash
+
+##
+ # This script is to handle fan fail condition which is described below.
+ # Fan fail means one fan RPM is under its CriticalLow. If BMC encounters
+ # such situation, then sets other fans to full speed.
+ #
+
+# get fan state
+function get_fan_state() {
+ get_property_path='xyz.openbmc_project.Sensor.Threshold.Critical CriticalAlarmLow'
+ fan_state="$(busctl get-property $1 $2 $get_property_path | awk '{print $2}')"
+ echo "$fan_state"
+}
+
+# check fan fail
+function is_fan_fail() {
+ fan_state=("$@")
+
+ for i in "${fan_state[@]}"
+ do
+ if [ ! -z "$i" ]
+ then
+ if [ $i == "true" ]
+ then
+ echo 1
+ return
+ fi
+ fi
+ done
+ echo 0
+}
+
+fan_tach_path=( '/xyz/openbmc_project/sensors/fan_tach/fan0'
+ '/xyz/openbmc_project/sensors/fan_tach/fan1'
+ '/xyz/openbmc_project/sensors/fan_tach/fan2'
+ '/xyz/openbmc_project/sensors/fan_tach/fan3'
+ '/xyz/openbmc_project/sensors/fan_tach/fan4'
+ )
+
+check_fail_flag=0
+is_fan_fail_flag=0
+current_fan_state=()
+
+while true
+do
+ for i in ${!fan_tach_path[@]}
+ do
+ mapper wait ${fan_tach_path[$i]}
+ hwmon_path="$(mapper get-service ${fan_tach_path[0]})"
+ current_fan_state[$i]=$(get_fan_state $hwmon_path ${fan_tach_path[$i]})
+ done
+
+ is_fan_fail_flag=$(is_fan_fail "${current_fan_state[@]}")
+
+ # if fan fails then set all fans to full speed
+ if [ $is_fan_fail_flag -eq 1 ] && [ $check_fail_flag -eq 0 ]
+ then
+ check_fail_flag=1
+ systemctl stop phosphor-pid-control.service
+
+ # fans recover to normal state
+ elif [ $is_fan_fail_flag -eq 0 ] && [ $check_fail_flag -eq 1 ]
+ then
+ check_fail_flag=0
+ systemctl restart phosphor-pid-control.service
+ fi
+
+ sleep 2
+done