From 74e28ad6ffd7f4e981e88dcc110506e83040bceb Mon Sep 17 00:00:00 2001
From: Santhosh Kumar T <53558409+santhosh-kt@users.noreply.github.com>
Date: Thu, 6 Feb 2020 18:53:27 +0530
Subject: [PATCH] [DellEMC] S6000 - Thermal support - Last Reboot Reason
 (#4097)

- Added support for Thermal event in Last Reboot Reason "show reboot-cause" command.
- Added support for sending log message in case of thermal shutdown.

sonic NOTICE root: Shutting down due to over temperature (40 degree, 30 degree, 34 degree)
---
 .../s6000/scripts/fancontrol.sh               | 144 +++++++++++++-----
 .../s6000/sonic_platform/chassis.py           |  34 +++++
 2 files changed, 138 insertions(+), 40 deletions(-)

diff --git a/platform/broadcom/sonic-platform-modules-dell/s6000/scripts/fancontrol.sh b/platform/broadcom/sonic-platform-modules-dell/s6000/scripts/fancontrol.sh
index 43315e06c9..665d5494b6 100755
--- a/platform/broadcom/sonic-platform-modules-dell/s6000/scripts/fancontrol.sh
+++ b/platform/broadcom/sonic-platform-modules-dell/s6000/scripts/fancontrol.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+trap 'cleanup' 0 1 2 3 6 9 10 11 13 15
 
 LEVEL=99
 INTERVAL=5
@@ -14,11 +15,27 @@ LEVEL3=16000
 LEVEL4=19000
 LEVEL5=19000
 
+LRR_FILE="/host/reboot-cause/reboot-cause.txt"
 I2C_ADAPTER="/sys/class/i2c-adapter/i2c-2/i2c-11"
+
 SENSOR1="$I2C_ADAPTER/11-004c/hwmon/hwmon*/temp1_input"
 SENSOR2="$I2C_ADAPTER/11-004d/hwmon/hwmon*/temp1_input"
 SENSOR3="$I2C_ADAPTER/11-004e/hwmon/hwmon*/temp1_input"
 
+SENSOR1_MAX="$I2C_ADAPTER/11-004c/hwmon/hwmon*/temp1_max"
+SENSOR2_MAX="$I2C_ADAPTER/11-004d/hwmon/hwmon*/temp1_max"
+SENSOR3_MAX="$I2C_ADAPTER/11-004e/hwmon/hwmon*/temp1_max"
+
+SENSOR1_MAX_VAL=$(cat $SENSOR1_MAX)
+SENSOR2_MAX_VAL=$(cat $SENSOR2_MAX)
+SENSOR3_MAX_VAL=$(cat $SENSOR3_MAX)
+
+# Reducing by 63 to differentiate this temperature settings
+# from pmon sensors configuration settings
+SENSOR1_NEW_MAX=$(expr `echo $SENSOR1_MAX_VAL` + 5000 - 63)
+SENSOR2_NEW_MAX=$(expr `echo $SENSOR2_MAX_VAL` + 5000 - 63)
+SENSOR3_NEW_MAX=$(expr `echo $SENSOR3_MAX_VAL` + 5000 - 63)
+
 # Three fan trays with each contains two separate fans
 # fan1-fan4 fan2-fan5 fan3-fan6
 FANTRAY1_FAN1=$I2C_ADAPTER/11-0029/fan1_target
@@ -46,6 +63,14 @@ function check_module
     fi
 }
 
+function cleanup
+{
+    echo $SENSOR1_MAX_VAL > $SENSOR1_MAX
+    echo $SENSOR2_MAX_VAL > $SENSOR2_MAX
+    echo $SENSOR3_MAX_VAL > $SENSOR3_MAX
+    exit 1
+}
+
 function check_faulty_fan
 {
 
@@ -123,56 +148,95 @@ function update_fan_speed
 
 function monitor_temp_sensors
 {
+    SENSOR1_CUR_MAX_VAL=$(cat $SENSOR1_MAX)
+    SENSOR2_CUR_MAX_VAL=$(cat $SENSOR2_MAX)
+    SENSOR3_CUR_MAX_VAL=$(cat $SENSOR3_MAX)
+    if [ "$SENSOR1_CUR_MAX_VAL" -ne "$SENSOR1_NEW_MAX" ]
+    then
+	SENSOR1_NEW_MAX=$(expr `echo $SENSOR1_CUR_MAX_VAL` + 5000 - 63)
+	SENSOR1_MAX_VAL=$SENSOR1_CUR_MAX_VAL
+	echo $SENSOR1_NEW_MAX > $SENSOR1_MAX
+    fi
+    if [ "$SENSOR2_CUR_MAX_VAL" -ne "$SENSOR2_NEW_MAX" ]
+    then
+	SENSOR2_NEW_MAX=$(expr `echo $SENSOR2_CUR_MAX_VAL` + 5000 - 63)
+	SENSOR2_MAX_VAL=$SENSOR2_CUR_MAX_VAL
+	echo $SENSOR2_NEW_MAX > $SENSOR2_MAX
+    fi
+    if [ "$SENSOR3_CUR_MAX_VAL" -ne "$SENSOR3_NEW_MAX" ]
+    then
+	SENSOR3_NEW_MAX=$(expr `echo $SENSOR3_CUR_MAX_VAL` + 5000 - 63)
+	SENSOR3_MAX_VAL=$SENSOR3_CUR_MAX_VAL
+	echo $SENSOR3_NEW_MAX > $SENSOR3_MAX
+    fi
 
-    while true # go through all temp sensor outputs
-    do
-        sensor1=$(expr `echo $(cat $SENSOR1)` / 1000)
-        sensor2=$(expr `echo $(cat $SENSOR2)` / 1000)
-        sensor3=$(expr `echo $(cat $SENSOR3)` / 1000)
-        sum=$(($sensor1 + $sensor2 + $sensor3))
-        sensor_temp=$(($sum/3))
+    # go through all temp sensor outputs
+    sensor1=$(expr `echo $(cat $SENSOR1)` / 1000)
+    sensor2=$(expr `echo $(cat $SENSOR2)` / 1000)
+    sensor3=$(expr `echo $(cat $SENSOR3)` / 1000)
+    # All sensors output in 1000's
+    s1=$(cat $SENSOR1)
+    s2=$(cat $SENSOR2)
+    s3=$(cat $SENSOR3)
 
-        if [ "$sensor_temp" -le "25" ] && [ "$LEVEL" -ne "0" ]
-        then
-            # Set Fan Speed to 7000 RPM"
-            LEVEL=0
-            update_fan_speed $IDLE
-            logger "Adjusted FAN Speed to $IDLE RPM against $sensor_temp Temperature"
+    if [ "$s1" -ge "$SENSOR1_MAX_VAL" ] || [ "$s2" -ge "$SENSOR2_MAX_VAL" ] || [ "$s3" -ge "$SENSOR3_MAX_VAL" ]
+    then
+        # Thermal trip is about to happen
+        echo "Thermal Overload $sensor1 $sensor2 $sensor3" > $LRR_FILE
+        logger "Shutting down due to over temperature ($sensor1 degree, $sensor2 degree, $sensor3 degree)"
+        sync
+	sleep 1 # Give time to send logger message to server
+        # Assigning the original max values back in sensors
+        echo $SENSOR1_MAX_VAL > $SENSOR1_MAX
+        echo $SENSOR2_MAX_VAL > $SENSOR2_MAX
+        echo $SENSOR3_MAX_VAL > $SENSOR3_MAX
 
-        elif [ "$sensor_temp" -ge "26" ] && [ "$sensor_temp" -le "44" ] && [ "$LEVEL" -ne "1" ]
-        then
-            # Set Fan Speed to 10000 RPM"
-            LEVEL=1
-            update_fan_speed $LEVEL1
-            logger "Adjusted FAN Speed to $IDLE RPM against $sensor_temp Temperature"
+        ### Not Reached ###
+	# In case if HW fails to shutdown
+        /sbin/shutdown -P now
+    fi
+    sum=$(($sensor1 + $sensor2 + $sensor3))
+    sensor_temp=$(($sum/3))
 
-        elif [ "$sensor_temp" -ge "45" ] && [ "$sensor_temp" -le "59" ] && [ "$LEVEL" -ne "2" ]
-        then
-            # Set Fan Speed to 13000 RPM"
-            LEVEL=2
-            update_fan_speed $LEVEL2
-            logger "Adjusted FAN Speed to $IDLE RPM against $sensor_temp Temperature"
+    if [ "$sensor_temp" -le "25" ] && [ "$LEVEL" -ne "0" ]
+    then
+        # Set Fan Speed to 7000 RPM"
+        LEVEL=0
+        update_fan_speed $IDLE
+        logger "Adjusted FAN Speed to $IDLE RPM against $sensor_temp Temperature"
 
-        elif [ "$sensor_temp" -ge "60" ] && [ "$sensor_temp" -le "79" ] && [ "$LEVEL" -ne "3" ]
-        then
-            # Set Fan Speed to 16000 RPM"
-            LEVEL=3
-            update_fan_speed $LEVEL3
-            logger "Adjusted FAN Speed to $IDLE RPM against $sensor_temp Temperature"
+    elif [ "$sensor_temp" -ge "26" ] && [ "$sensor_temp" -le "44" ] && [ "$LEVEL" -ne "1" ]
+    then
+        # Set Fan Speed to 10000 RPM"
+        LEVEL=1
+        update_fan_speed $LEVEL1
+        logger "Adjusted FAN Speed to $IDLE RPM against $sensor_temp Temperature"
 
-        elif [ "$sensor_temp" -ge "80" ] && [ "$LEVEL" -ne "4" ]
-        then
-            # Set Fan Speed to 19000 RPM"
-            LEVEL=4
-            update_fan_speed $LEVEL4
-            logger "Adjusted FAN Speed to $IDLE RPM against $sensor_temp Temperature"
-        fi
+    elif [ "$sensor_temp" -ge "45" ] && [ "$sensor_temp" -le "59" ] && [ "$LEVEL" -ne "2" ]
+    then
+        # Set Fan Speed to 13000 RPM"
+        LEVEL=2
+        update_fan_speed $LEVEL2
+        logger "Adjusted FAN Speed to $IDLE RPM against $sensor_temp Temperature"
+
+    elif [ "$sensor_temp" -ge "60" ] && [ "$sensor_temp" -le "79" ] && [ "$LEVEL" -ne "3" ]
+    then
+        # Set Fan Speed to 16000 RPM"
+        LEVEL=3
+        update_fan_speed $LEVEL3
+        logger "Adjusted FAN Speed to $IDLE RPM against $sensor_temp Temperature"
+
+    elif [ "$sensor_temp" -ge "80" ] && [ "$LEVEL" -ne "4" ]
+    then
+        # Set Fan Speed to 19000 RPM"
+        LEVEL=4
+        update_fan_speed $LEVEL4
+        logger "Adjusted FAN Speed to $IDLE RPM against $sensor_temp Temperature"
+    fi
 
     # Check for faulty fan
     check_faulty_fan
 
-    done
-
 }
 
 # Check drivers for sysfs attributes
diff --git a/platform/broadcom/sonic-platform-modules-dell/s6000/sonic_platform/chassis.py b/platform/broadcom/sonic-platform-modules-dell/s6000/sonic_platform/chassis.py
index e94a7d1210..8bb95cac1d 100755
--- a/platform/broadcom/sonic-platform-modules-dell/s6000/sonic_platform/chassis.py
+++ b/platform/broadcom/sonic-platform-modules-dell/s6000/sonic_platform/chassis.py
@@ -11,6 +11,7 @@ try:
     import os
     import time
     import datetime
+    import struct
     import subprocess
     from sonic_platform_base.chassis_base import ChassisBase
     from sonic_platform.sfp import Sfp
@@ -41,6 +42,7 @@ class Chassis(ChassisBase):
     reset_reason_dict = {}
     reset_reason_dict[0xe] = ChassisBase.REBOOT_CAUSE_NON_HARDWARE
     reset_reason_dict[0x6] = ChassisBase.REBOOT_CAUSE_NON_HARDWARE
+    reset_reason_dict[0x7] = ChassisBase.REBOOT_CAUSE_THERMAL_OVERLOAD_OTHER
 
     def __init__(self):
         ChassisBase.__init__(self)
@@ -100,6 +102,36 @@ class Chassis(ChassisBase):
         rv = rv.lstrip(" ")
         return rv
 
+    def _nvram_write(self, offset, val):
+        resource = "/dev/nvram"
+        fd = os.open(resource, os.O_RDWR)
+        if (fd < 0):
+            print('File open failed ',resource)
+            return
+        if (os.lseek(fd, offset, os.SEEK_SET) != offset):
+            print('lseek failed on ',resource)
+            return
+        ret = os.write(fd, struct.pack('B', val))
+        if ret != 1:
+            print('Write failed ',str(ret))
+            return
+        os.close(fd)
+
+    def _get_thermal_reset(self):
+        reset_file = "/host/reboot-cause/reboot-cause.txt"
+        if (not os.path.isfile(reset_file)):
+            return False
+        try:
+            with open(reset_file, 'r') as fd:
+                rv = fd.read()
+        except Exception as error:
+            return False
+
+        if "Thermal Overload" in rv:
+            return True
+
+        return False
+
     def get_name(self):
         """
         Retrieves the name of the chassis
@@ -181,6 +213,8 @@ class Chassis(ChassisBase):
         # NVRAM. Only Warmboot and Coldboot reason are supported here.
         # Since it does not support any hardware reason, we return
         # non_hardware as default
+        if self._get_thermal_reset() == True:
+            self._nvram_write(0x49, 0x7)
 
         lrr = self._get_cpld_register('last_reboot_reason')
         if (lrr != 'ERR'):