111 lines
2.9 KiB
Python
111 lines
2.9 KiB
Python
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#
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# fanutil.py
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# Platform-specific Fan status interface for SONiC
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#
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import logging
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import os.path
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try:
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from sonic_fan.fan_base import FanBase
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except ImportError as e:
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raise ImportError (str(e) + "- required module not found")
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class FanUtil(FanBase):
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"""Platform-specific FANutil class"""
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SYS_FAN_NUM = 6
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NUM_FANS_PERTRAY = 2
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HWMON_PATH = '/sys/class/hwmon/hwmon2/'
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FAN_INDEX_START = 18
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logger = logging.getLogger(__name__)
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def __init__(self, log_level=logging.DEBUG):
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FanBase.__init__(self)
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self.num_fans = (self.SYS_FAN_NUM * self.NUM_FANS_PERTRAY)
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# Get sysfs attribute
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def get_attr_value(self, attr_path):
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retval = 'ERR'
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if (not os.path.isfile(attr_path)):
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return retval
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try:
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with open(attr_path, 'r') as fd:
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retval = fd.read()
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except Exception:
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logging.error("Unable to open ", attr_path, " file !")
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retval = retval.rstrip('\r\n')
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return retval
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def check_fan_index(self, index):
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if index is None:
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return False
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if index < 1 or index > self.num_fans:
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logging.error("Invalid Fan index:", index)
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return False
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return True
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def get_num_fans(self):
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return self.num_fans
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def get_status(self, index):
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if self.check_fan_index(index) == False:
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return False
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fantray_speed_file = 'fan' + str(self.FAN_INDEX_START+(index-1)) + '_input'
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fantray_speed = self.get_attr_value(self.HWMON_PATH + fantray_speed_file)
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if fantray_speed == '0.0' :
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return False
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return True
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def get_presence(self, index):
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if self.check_fan_index(index) == False:
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return False
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fantray_present_file = 'fan' + str(self.FAN_INDEX_START+(index-1)) + '_present'
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fantray_present = self.get_attr_value(self.HWMON_PATH + fantray_present_file)
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if fantray_present == '1' :
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return True
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return False
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def get_direction(self, index):
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if self.check_fan_index(index) == False:
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return None
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fantray_direction_file = 'fan' + str(self.FAN_INDEX_START+(index-1)) + '_direction'
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fantray_direction = self.get_attr_value(self.HWMON_PATH + fantray_direction_file)
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"""
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1: FB 2: BF
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Since the fan is at rear of the switch, FB means Exhaust; BF means Intake
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"""
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if fantray_direction == '2':
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return "INTAKE"
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else:
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return "EXHAUST"
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def get_speed(self, index):
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if self.check_fan_index(index) == False:
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return 0
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fantray_speed_file = 'fan' + str(self.FAN_INDEX_START+(index-1)) + '_input'
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fantray_speed = self.get_attr_value(self.HWMON_PATH + fantray_speed_file)
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return int(float(fantray_speed))
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def set_speed(self, val):
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logging.error("Not allowed to set fan speed!")
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return False
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