3239d7fc5b
* [plugins]add fan functions, add voltage, current, power for psu * [plugins]link fanutil.py and psuutil.py to those in 2700 * [plugin]add thermal * [plugin]add symbol links for thermalutil for all SKUs
200 lines
7.1 KiB
Python
200 lines
7.1 KiB
Python
#!/usr/bin/env python
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#############################################################################
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# Mellanox
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#
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# Module contains an implementation of SONiC PSU Base API and
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# provides the PSUs status which are available in the platform
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#
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#############################################################################
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try:
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import os.path
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import syslog
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import subprocess
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from glob import glob
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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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def log_err(msg):
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syslog.openlog("fanutil")
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syslog.syslog(syslog.LOG_ERR, msg)
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syslog.closelog()
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class FanUtil(FanBase):
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"""Platform-specific FanUtil class"""
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PWM_MAX = 255
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MAX_FAN_PER_DRAWER = 2
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GET_HWSKU_CMD = "sonic-cfggen -d -v DEVICE_METADATA.localhost.hwsku"
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sku_without_fan_direction = ['ACS-MSN2010', 'ACS-MSN2100', 'ACS-MSN2410', 'ACS-MSN2700', 'Mellanox-SN2700', 'Mellanox-SN2700-D48C8', 'LS-SN2700', 'ACS-MSN2740']
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sku_with_unpluggable_fan = ['ACS-MSN2010', 'ACS-MSN2100']
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def __init__(self):
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FanBase.__init__(self)
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self.sku_name = self._get_sku_name()
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self.fan_path = "/var/run/hw-management/"
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if self.sku_name in self.sku_with_unpluggable_fan:
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self.fan_status = None
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self.unpluggable_fan = True
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else:
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self.fan_status = "thermal/fan{}_status"
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self.unpluggable_fan = False
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self.fan_get_speed = "thermal/fan{}_speed_get"
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self.fan_set_speed = "thermal/fan{}_speed_set"
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if self.sku_name in self.sku_without_fan_direction:
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self.fan_direction = None
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else:
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self.fan_direction = "system/fan_dir"
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self.fan_led_green = "led/led_fan*_green"
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self.num_of_fan, self.num_of_drawer = self._extract_num_of_fans_and_fan_drawers()
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def _get_sku_name(self):
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p = subprocess.Popen(self.GET_HWSKU_CMD, shell=True, stdout=subprocess.PIPE)
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out, err = p.communicate()
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return out.rstrip('\n')
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def _extract_num_of_fans_and_fan_drawers(self):
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# So far we don't have files representing the number of fans and drawers
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# The only way to retrieve the number is to count files.
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# for number of fans, we get it via couting the speed files.
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# for number of draws, we get it via couting the green led files.
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list_of_fan_speed = glob(self.fan_path + self.fan_get_speed.format("*"))
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num_of_fan = len(list_of_fan_speed)
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list_of_fan_leds = glob(self.fan_path + self.fan_led_green)
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num_of_drawer = len(list_of_fan_leds)
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return num_of_fan, num_of_drawer
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def _convert_fan_index_to_drawer_index(self, index):
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return (index + self.MAX_FAN_PER_DRAWER - 1) / self.MAX_FAN_PER_DRAWER
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def _read_file(self, file_pattern, index = 0):
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"""
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Reads the file of the fan
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:param file_pattern: The filename convention
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:param index: An integer, 1-based index of the fan of which to query status
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:return: int
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"""
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return_value = 0
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try:
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with open(os.path.join(self.fan_path, file_pattern.format(index)), 'r') as file_to_read:
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return_value = int(file_to_read.read())
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except IOError:
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log_err("Read file {} failed".format(self.fan_path + file_pattern.format(index)))
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return return_value
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return return_value
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def get_num_fans(self):
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"""
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Retrieves the number of FANs supported on the device
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:return: An integer, the number of FANs supported on the device
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"""
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return self.num_of_fan
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def get_status(self, index):
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"""
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Retrieves the operational status of FAN defined
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by index 1-based <index>
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:param index: An integer, 1-based index of the PSU of which to query status
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:return: Boolean,
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- True if FAN is running with some speed
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- False if FAN has stopped running
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"""
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if not self.get_presence(index):
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return False
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return self.get_speed(index) != 0
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def get_presence(self, index):
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"""
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Retrieves the presence status of a FAN defined
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by 1-based index <index>
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:param index: An integer, 1-based index of the FAN of which to query status
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:return: Boolean, True if FAN is plugged, False if not
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"""
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if index > self.num_of_fan:
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raise RuntimeError("index ({}) shouldn't be greater than number of fans ({})".format(index, self.num_of_fan))
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if self.unpluggable_fan:
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return True
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draw_index = self._convert_fan_index_to_drawer_index(index)
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presence = self._read_file(self.fan_status, draw_index)
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return presence != 0
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def get_direction(self, index):
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"""
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Retrieves the airflow direction of a FAN defined
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by 1-based index <index>
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:param index: An integer, 1-based index of the FAN of which to query status
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:return: string, denoting FAN airflow direction
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Note:
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What Mellanox calls forward:
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Air flows from fans side to QSFP side, for example: MSN2700-CS2F
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which means intake in community
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What Mellanox calls reverse:
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Air flow from QSFP side to fans side, for example: MSN2700-CS2R
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which means exhaust in community
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According to hw-mgmt:
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1 stands for forward, in other words intake
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0 stands for reverse, in other words exhaust
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"""
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if not self.fan_direction:
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return self.FAN_DIRECTION_NOT_APPLICABLE
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if index > self.num_of_fan:
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raise RuntimeError("index ({}) shouldn't be greater than number of fans ({})".format(index, self.num_of_fan))
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drawer_index = self._convert_fan_index_to_drawer_index(index)
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fan_dir_bits = self._read_file(self.fan_direction)
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fan_mask = 1 << drawer_index - 1
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if fan_dir_bits & fan_mask:
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return self.FAN_DIRECTION_INTAKE
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else:
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return self.FAN_DIRECTION_EXHAUST
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def get_speed(self, index):
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"""
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Retrieves the speed of a Front FAN in the tray in revolutions per minute defined
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by 1-based index <index>
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:param index: An integer, 1-based index of the FAN of which to query speed
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:return: integer, denoting front FAN speed
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"""
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speed = self._read_file(self.fan_get_speed, index)
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return speed
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def set_speed(self, val):
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"""
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Sets the speed of all the FANs to a value denoted by the duty-cycle percentage val
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:param val: An integer, <0-100> denoting FAN duty cycle percentage
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:return: Boolean, True if operation is successful, False if not
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"""
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status = True
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pwm = int(round(self.PWM_MAX*val/100.0))
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try:
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with open(os.path.join(self.fan_path, self.fan_set_speed.format(1)), 'w') as fan_pwm:
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fan_pwm.write(str(pwm))
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except (ValueError, IOError):
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log_err("Read file {} failed".format(self.fan_path + self.fan_set_speed.format(1)))
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status = False
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return status
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