310 lines
10 KiB
Python
310 lines
10 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 Platform 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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from sonic_platform_base.psu_base import PsuBase
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from sonic_daemon_base.daemon_base import Logger
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from sonic_platform.fan import Fan
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except ImportError as e:
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raise ImportError (str(e) + "- required module not found")
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LED_ON = '1'
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LED_OFF = '0'
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# Global logger class instance
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logger = Logger()
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psu_list = []
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PSU_CURRENT = "current"
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PSU_VOLTAGE = "voltage"
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PSU_POWER = "power"
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LED_PATH = "/var/run/hw-management/led/"
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# SKUs with unplugable PSUs:
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# 1. don't have psuX_status and should be treated as always present
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# 2. don't have voltage, current and power values
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hwsku_dict_with_unplugable_psu = ['ACS-MSN2010', 'ACS-MSN2100']
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# in most SKUs the file psuX_curr, psuX_volt and psuX_power contain current, voltage and power data respectively.
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# but there are exceptions which will be handled by the following dictionary
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hwsku_dict_psu = {'ACS-MSN3700': 1, 'ACS-MSN3700C': 1, 'ACS-MSN3800': 1, 'Mellanox-SN3800-D112C8': 1, 'ACS-MSN4700': 1}
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psu_profile_list = [
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# default filename convention
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{
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PSU_CURRENT : "power/psu{}_curr",
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PSU_VOLTAGE : "power/psu{}_volt",
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PSU_POWER : "power/psu{}_power"
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},
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# for 3700, 3700c, 3800, 4700
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{
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PSU_CURRENT : "power/psu{}_curr",
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PSU_VOLTAGE : "power/psu{}_volt_out2",
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PSU_POWER : "power/psu{}_power"
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}
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]
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class Psu(PsuBase):
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"""Platform-specific Psu class"""
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STATUS_LED_COLOR_ORANGE = "orange"
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def __init__(self, psu_index, sku):
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global psu_list
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PsuBase.__init__(self)
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# PSU is 1-based on Mellanox platform
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self.index = psu_index + 1
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psu_list.append(self.index)
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self.psu_path = "/var/run/hw-management/"
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psu_oper_status = "thermal/psu{}_pwr_status".format(self.index)
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#psu_oper_status should always be present for all SKUs
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self.psu_oper_status = os.path.join(self.psu_path, psu_oper_status)
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self._name = "PSU{}".format(psu_index + 1)
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if sku in hwsku_dict_psu:
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filemap = psu_profile_list[hwsku_dict_psu[sku]]
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else:
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filemap = psu_profile_list[0]
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if sku in hwsku_dict_with_unplugable_psu:
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self.always_presence = True
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self.psu_voltage = None
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self.psu_current = None
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self.psu_power = None
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self.psu_presence = None
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else:
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self.always_presence = False
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psu_voltage = filemap[PSU_VOLTAGE].format(self.index)
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psu_voltage = os.path.join(self.psu_path, psu_voltage)
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self.psu_voltage = psu_voltage
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psu_current = filemap[PSU_CURRENT].format(self.index)
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psu_current = os.path.join(self.psu_path, psu_current)
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self.psu_current = psu_current
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psu_power = filemap[PSU_POWER].format(self.index)
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psu_power = os.path.join(self.psu_path, psu_power)
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self.psu_power = psu_power
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psu_presence = "thermal/psu{}_status".format(self.index)
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psu_presence = os.path.join(self.psu_path, psu_presence)
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self.psu_presence = psu_presence
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# unplugable PSU has no FAN
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if sku not in hwsku_dict_with_unplugable_psu:
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fan = Fan(False, psu_index, psu_index, True)
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self._fan_list.append(fan)
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self.psu_green_led_path = "led_psu_green"
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self.psu_red_led_path = "led_psu_red"
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self.psu_orange_led_path = "led_psu_orange"
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self.psu_led_cap_path = "led_psu_capability"
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def get_name(self):
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return self._name
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def _read_generic_file(self, filename, len):
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"""
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Read a generic file, returns the contents of the file
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"""
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result = 0
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try:
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with open(filename, 'r') as fileobj:
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result = int(fileobj.read().strip())
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except Exception as e:
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logger.log_info("Fail to read file {} due to {}".format(filename, repr(e)))
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return result
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def get_powergood_status(self):
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"""
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Retrieves the operational status of power supply unit (PSU) defined
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Returns:
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bool: True if PSU is operating properly, False if not
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"""
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status = self._read_generic_file(os.path.join(self.psu_path, self.psu_oper_status), 0)
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return status == 1
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def get_presence(self):
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"""
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Retrieves the presence status of power supply unit (PSU) defined
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Returns:
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bool: True if PSU is present, False if not
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"""
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if self.always_presence:
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return self.always_presence
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else:
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status = self._read_generic_file(self.psu_presence, 0)
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return status == 1
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def get_voltage(self):
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"""
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Retrieves current PSU voltage output
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Returns:
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A float number, the output voltage in volts,
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e.g. 12.1
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"""
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if self.psu_voltage is not None and self.get_powergood_status():
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voltage = self._read_generic_file(self.psu_voltage, 0)
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return float(voltage) / 1000
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else:
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return None
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def get_current(self):
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"""
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Retrieves present electric current supplied by PSU
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Returns:
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A float number, the electric current in amperes, e.g 15.4
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"""
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if self.psu_current is not None and self.get_powergood_status():
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amperes = self._read_generic_file(self.psu_current, 0)
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return float(amperes) / 1000
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else:
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return None
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def get_power(self):
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"""
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Retrieves current energy supplied by PSU
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Returns:
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A float number, the power in watts, e.g. 302.6
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"""
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if self.psu_power is not None and self.get_powergood_status():
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power = self._read_generic_file(self.psu_power, 0)
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return float(power) / 1000000
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else:
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return None
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def _get_led_capability(self):
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cap_list = None
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try:
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with open(os.path.join(LED_PATH, self.psu_led_cap_path), 'r') as psu_led_cap:
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caps = psu_led_cap.read()
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cap_list = caps.split()
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except (ValueError, IOError):
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status = 0
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return cap_list
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def set_status_led(self, color):
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"""
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Sets the state of the PSU status LED
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Args:
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color: A string representing the color with which to set the
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PSU status LED
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Returns:
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bool: True if status LED state is set successfully, False if not
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Notes:
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Only one led for all PSUs.
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"""
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led_cap_list = self._get_led_capability()
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if led_cap_list is None:
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return False
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status = False
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try:
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if color == self.STATUS_LED_COLOR_GREEN:
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with open(os.path.join(LED_PATH, self.psu_green_led_path), 'w') as psu_led:
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psu_led.write(LED_ON)
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status = True
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elif color == self.STATUS_LED_COLOR_RED:
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# Some fan don't support red led but support orange led, in this case we set led to orange
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if self.STATUS_LED_COLOR_RED in led_cap_list:
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led_path = os.path.join(LED_PATH, self.psu_red_led_path)
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elif self.STATUS_LED_COLOR_ORANGE in led_cap_list:
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led_path = os.path.join(LED_PATH, self.psu_orange_led_path)
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else:
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return False
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with open(led_path, 'w') as psu_led:
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psu_led.write(LED_ON)
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status = True
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elif color == self.STATUS_LED_COLOR_OFF:
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if self.STATUS_LED_COLOR_GREEN in led_cap_list:
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with open(os.path.join(LED_PATH, self.psu_green_led_path), 'w') as psu_led:
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psu_led.write(str(LED_OFF))
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if self.STATUS_LED_COLOR_RED in led_cap_list:
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with open(os.path.join(LED_PATH, self.psu_red_led_path), 'w') as psu_led:
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psu_led.write(str(LED_OFF))
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if self.STATUS_LED_COLOR_ORANGE in led_cap_list:
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with open(os.path.join(LED_PATH, self.psu_orange_led_path), 'w') as psu_led:
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psu_led.write(str(LED_OFF))
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status = True
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else:
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status = False
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except (ValueError, IOError):
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status = False
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return status
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def get_status_led(self):
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"""
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Gets the state of the PSU status LED
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Returns:
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A string, one of the predefined STATUS_LED_COLOR_* strings above
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"""
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led_cap_list = self._get_led_capability()
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if led_cap_list is None:
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return self.STATUS_LED_COLOR_OFF
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try:
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with open(os.path.join(LED_PATH, self.psu_green_led_path), 'r') as psu_led:
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if LED_OFF != psu_led.read().rstrip('\n'):
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return self.STATUS_LED_COLOR_GREEN
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if self.STATUS_LED_COLOR_RED in led_cap_list:
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with open(os.path.join(LED_PATH, self.psu_red_led_path), 'r') as psu_led:
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if LED_OFF != psu_led.read().rstrip('\n'):
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return self.STATUS_LED_COLOR_RED
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if self.STATUS_LED_COLOR_ORANGE in led_cap_list:
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with open(os.path.join(LED_PATH, self.psu_orange_led_path), 'r') as psu_led:
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if LED_OFF != psu_led.read().rstrip('\n'):
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return self.STATUS_LED_COLOR_RED
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except (ValueError, IOError) as e:
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raise RuntimeError("Failed to read led status for psu due to {}".format(repr(e)))
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return self.STATUS_LED_COLOR_OFF
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def get_power_available_status(self):
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"""
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Gets the power available status
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Returns:
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True if power is present and power on.
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False and "absence of PSU" if power is not present.
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False and "absence of power" if power is present but not power on.
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"""
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if not self.get_presence():
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return False, "absence of PSU"
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elif not self.get_powergood_status():
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return False, "absence of power"
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else:
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return True, ""
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