[platform] Add hwrebootcause for IX7 to retrieve power loss info from BMC elist

Author: roberthong-qct

platform/broadcom/sonic-platform-modules-quanta/ix7-32x/sonic_platform/chassis.py

@@ -16,6 +16,7 @@
     from sonic_platform.fan import Fan
     from sonic_platform.fan_drawer import FanDrawer
     from sonic_platform.thermal import Thermal
+    from sonic_platform.hwrebootcause import HWRebootCause
 
 except ImportError as e:
     raise ImportError(str(e) + "- required module not found")
@@ -79,6 +80,8 @@ def __init__(self):
         self._component_list.extend(ComponentCPLD.get_component_list())
         self._component_list.append(ComponentPCIE())
 
+        self.hw_reboot_cause = HWRebootCause()
+
 ##############################################
 # Device methods
 ##############################################
@@ -221,9 +224,10 @@ def get_reboot_cause(self):
             is "REBOOT_CAUSE_HARDWARE_OTHER", the second string can be used
             to pass a description of the reboot cause.
         """
-        return (ChassisBase.REBOOT_CAUSE_NON_HARDWARE, None)
-        #TODO: Add Hardware and watchdog reboot cause
-        #return (ChassisBase.REBOOT_CAUSE_HARDWARE_OTHER, "Invalid Reason")
+        if self.hw_reboot_cause.check_power_loss():
+            return (ChassisBase.REBOOT_CAUSE_POWER_LOSS, None)
+        else:
+            return (ChassisBase.REBOOT_CAUSE_NON_HARDWARE, None)
 
     ##############################################
     # Other methods

platform/broadcom/sonic-platform-modules-quanta/ix7-32x/sonic_platform/hwrebootcause.py

@@ -0,0 +1,99 @@
+#!/usr/bin/env python
+
+import os
+import subprocess
+from datetime import datetime
+from sonic_py_common.general import getstatusoutput_noshell_pipe
+
+GPIO_DIR = "/sys/class/gpio/"
+GPIO_EXPORT_PATH = GPIO_DIR + "export"
+POWER_LOSS_GPIO = "18" #TP_MB_PCA9555_PIN6
+POWER_LOSS_GPIO_VALUE = GPIO_DIR + "gpio" + POWER_LOSS_GPIO + "/value"
+POWER_LOSS_GPIO_DIRECTION = GPIO_DIR + "gpio" + POWER_LOSS_GPIO + "/direction"
+
+
+class HWRebootCause(object):
+
+    def __init__(self):
+        pass
+
+    def exec_cmd(self, cmd):
+        status, output = subprocess.getstatusoutput(cmd)
+        if status:
+            print('Failed :' + cmd)
+        return status, output
+
+    @staticmethod
+    def _get_command_result_pipe(cmd1, cmd2):
+        try:
+            rc, result = getstatusoutput_noshell_pipe(cmd1, cmd2)
+            if rc != [0, 0]:
+                raise RuntimeError("Failed to execute command {} {}, return code {}, {}".format(cmd1, cmd2, rc, result))
+
+        except OSError as e:
+            raise RuntimeError("Failed to execute command {} {} due to {}".format(cmd1, cmd2, repr(e)))
+
+        return result
+
+    def check_power_loss(self):
+        if os.path.isfile(POWER_LOSS_GPIO_VALUE):
+            hw_reboot_cause = '0'
+            with open(POWER_LOSS_GPIO_VALUE, 'r') as f:
+                hw_reboot_cause = f.read()
+            print("hw_reboot_cause:"+str(hw_reboot_cause))
+            return bool(hw_reboot_cause == '1')
+
+        try:
+            event_log = self._get_command_result_pipe(["ipmitool", "sel", "elist"], ["grep", 'AC lost | Asserted'])
+            ac_lost_event = "1 | 01/01/2000 | 00:00:00 | Event log Initiated"  # Init event log string
+            if len(event_log) > 0:
+                ac_lost_event = event_log.split('\n')[-1].strip()
+                print(ac_lost_event)
+
+            event_log = self._get_command_result_pipe(["ipmitool", "sel", "elist"], ["grep", 'Power Supply AC lost | Deasserted'])
+            power_off_deasserted_event = "1 | 01/01/2000 | 00:00:00 | Event log Initiated"  # Init event log string
+            if len(event_log) > 0:
+                power_off_deasserted_event = event_log.split('\n')[-1].strip()
+                print(power_off_deasserted_event)
+
+            event_log = self._get_command_result_pipe(["ipmitool", "sel", "elist"], ["grep", 'System Restart | Asserted'])
+            sys_restart_event = "1 | 01/01/2000 | 00:00:00 | Event log Initiated"  # Init event log string
+            if len(event_log) > 0:
+                sys_restart_event = event_log.split('\n')[-1].strip()
+                print(sys_restart_event)
+
+            """126 | 04/27/2020 | 13:16:27 | Power Unit Power Unit | AC lost | Asserted"""
+            ac_lost_event = ac_lost_event.split("|")
+            ac_lost_order = int(ac_lost_event[0], 16)
+            """2a70 | 02/17/2021 | 09:45:25 | Power Supply PSU_n Input lost | Power Supply AC lost | Deasserted"""
+            power_off_deasserted_event = power_off_deasserted_event.split("|")
+            power_off_deasserted_time = datetime.strptime(
+                power_off_deasserted_event[1] + power_off_deasserted_event[2], ' %m/%d/%Y  %H:%M:%S ')
+
+            """127 | 04/27/2020 | 13:16:26 | System Boot Initiated | System Restart | Asserted"""
+            sys_restart_event = sys_restart_event.split("|")
+            sys_restart_order = int(sys_restart_event[0], 16)
+            sys_restart_time = datetime.strptime(
+                sys_restart_event[1] + sys_restart_event[2], ' %m/%d/%Y  %H:%M:%S ')
+
+        except Exception as error:
+            print("check_power_loss failed: {} !".format(str(error)))
+            return False
+
+        with open(GPIO_EXPORT_PATH, 'w') as f:
+            f.write(POWER_LOSS_GPIO + '\n')
+
+        with open(POWER_LOSS_GPIO_DIRECTION, 'w') as f:
+            f.write('out\n')
+
+        order_diff = sys_restart_order - ac_lost_order
+        power_off_time_diff = power_off_deasserted_time - sys_restart_time
+
+        if order_diff == 1 or (power_off_time_diff.total_seconds() > -5 and power_off_time_diff.total_seconds() < 12):
+            with open(POWER_LOSS_GPIO_VALUE, 'w') as f:
+                f.write('1\n')
+            return True
+        else:
+            with open(POWER_LOSS_GPIO_VALUE, 'w') as f:
+                f.write('0\n')
+            return False