72 lines
2.6 KiB
Python
72 lines
2.6 KiB
Python
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#!/usr/bin/env python
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#############################################################################
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# Celestica
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#
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# Module contains an implementation of SONiC Platform Base API and
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# provides the Chassis information which are available in the platform
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#
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#############################################################################
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try:
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import subprocess
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from sonic_platform_base.chassis_base import ChassisBase
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except ImportError as e:
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raise ImportError(str(e) + "- required module not found")
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RESET_REGISTER = "0x103"
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GETREG_PATH = "/sys/devices/platform/dx010_cpld/getreg"
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HOST_REBOOT_CAUSE_PATH = "/host/reboot-cause/"
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REBOOT_CAUSE_FILE = "reboot-cause.txt"
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class Chassis(ChassisBase):
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"""Platform-specific Chassis class"""
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def __init__(self):
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ChassisBase.__init__(self)
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def __get_register_value(self, register):
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# Retrieves the cpld register value
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cmd = "echo {1} > {0}; cat {0}".format(GETREG_PATH, register)
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p = subprocess.Popen(
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cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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raw_data, err = p.communicate()
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if err is not '':
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return None
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return raw_data.strip()
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def __read_txt_file(self, file_path):
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try:
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with open(file_path, 'r') as fd:
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data = fd.read()
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return data.strip()
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except IOError:
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pass
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return None
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def get_reboot_cause(self):
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"""
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Retrieves the cause of the previous reboot
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Returns:
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A tuple (string, string) where the first element is a string
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containing the cause of the previous reboot. This string must be
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one of the predefined strings in this class. If the first string
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is "REBOOT_CAUSE_HARDWARE_OTHER", the second string can be used
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to pass a description of the reboot cause.
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"""
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reboot_cause_path = (HOST_REBOOT_CAUSE_PATH + REBOOT_CAUSE_FILE)
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sw_reboot_cause = self.__read_txt_file(reboot_cause_path) or "Unknown"
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hw_reboot_cause = self.__get_register_value(RESET_REGISTER)
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prev_reboot_cause = {
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'0x11': (self.REBOOT_CAUSE_POWER_LOSS, 'Power on reset'),
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'0x22': (self.REBOOT_CAUSE_WATCHDOG, 'Watchdog reset'),
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'0x33': (self.REBOOT_CAUSE_HARDWARE_OTHER, 'Power cycle reset triggered by CPU')
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}.get(hw_reboot_cause, (self.REBOOT_CAUSE_HARDWARE_OTHER, 'Unknown reason'))
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if sw_reboot_cause != 'Unknown' and ( hw_reboot_cause == '0x11' or hw_reboot_cause == '0x33'):
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prev_reboot_cause = (self.REBOOT_CAUSE_NON_HARDWARE, sw_reboot_cause)
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return prev_reboot_cause
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