246 lines
7.9 KiB
Python
246 lines
7.9 KiB
Python
|
#!/usr/bin/env python
|
||
|
|
|
||
|
|
#############################################################################
|
||
|
|
# Mellanox
|
||
|
|
#
|
||
|
|
# Module contains an implementation of SONiC Platform Base API and
|
||
|
|
# provides the FANs status which are available in the platform
|
||
|
|
#
|
||
|
|
#############################################################################
|
||
|
|
|
||
|
|
import os.path
|
||
|
|
|
||
|
|
try:
|
||
|
|
from sonic_platform_base.fan_base import FanBase
|
||
|
|
except ImportError as e:
|
||
|
|
raise ImportError (str(e) + "- required module not found")
|
||
|
|
|
||
|
|
LED_ON = 1
|
||
|
|
LED_OFF = 0
|
||
|
|
|
||
|
|
PWM_MAX = 255
|
||
|
|
|
||
|
|
FAN_PATH = "/var/run/hw-management/thermal/"
|
||
|
|
LED_PATH = "/var/run/hw-management/led/"
|
||
|
|
|
||
|
|
class Fan(FanBase):
|
||
|
|
"""Platform-specific Fan class"""
|
||
|
|
def __init__(self, fan_index, drawer_index = 1, psu_fan = False):
|
||
|
|
# API index is starting from 0, Mellanox platform index is starting from 1
|
||
|
|
self.index = fan_index + 1
|
||
|
|
self.drawer_index = drawer_index + 1
|
||
|
|
|
||
|
|
self.is_psu_fan = psu_fan
|
||
|
|
|
||
|
|
self.fan_min_speed_path = "fan{}_min".format(self.index)
|
||
|
|
if not self.is_psu_fan:
|
||
|
|
self.fan_speed_get_path = "fan{}_speed_get".format(self.index)
|
||
|
|
self.fan_speed_set_path = "fan{}_speed_set".format(self.index)
|
||
|
|
self.fan_presence_path = "fan{}_status".format(self.drawer_index)
|
||
|
|
self.fan_max_speed_path = "fan{}_max".format(self.index)
|
||
|
|
else:
|
||
|
|
self.fan_speed_get_path = "psu{}_fan1_speed_get".format(self.index)
|
||
|
|
self.fan_presence_path = "psu{}_fan1_speed_get".format(self.index)
|
||
|
|
self.fan_max_speed_path = "psu{}_max".format(self.index)
|
||
|
|
self.fan_status_path = "fan{}_fault".format(self.index)
|
||
|
|
self.fan_green_led_path = "led_fan{}_green".format(self.drawer_index)
|
||
|
|
self.fan_red_led_path = "led_fan{}_red".format(self.drawer_index)
|
||
|
|
self.fan_orange_led_path = "led_fan{}_orange".format(self.drawer_index)
|
||
|
|
self.fan_pwm_path = "pwm1"
|
||
|
|
self.fan_led_cap_path = "led_fan{}_capability".format(self.drawer_index)
|
||
|
|
|
||
|
|
def get_status(self):
|
||
|
|
"""
|
||
|
|
Retrieves the operational status of fan
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
bool: True if fan is operating properly, False if not
|
||
|
|
"""
|
||
|
|
status = 0
|
||
|
|
if self.is_psu_fan:
|
||
|
|
status = 1
|
||
|
|
else:
|
||
|
|
try:
|
||
|
|
with open(os.path.join(FAN_PATH, self.fan_status_path), 'r') as fault_status:
|
||
|
|
status = int(fault_status.read())
|
||
|
|
except (ValueError, IOError):
|
||
|
|
status = 0
|
||
|
|
|
||
|
|
return status == 1
|
||
|
|
|
||
|
|
def get_presence(self):
|
||
|
|
"""
|
||
|
|
Retrieves the presence status of fan
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
bool: True if fan is present, False if not
|
||
|
|
"""
|
||
|
|
status = 0
|
||
|
|
if self.is_psu_fan:
|
||
|
|
if os.path.exists(os.path.join(FAN_PATH, self.fan_presence_path)):
|
||
|
|
status = 1
|
||
|
|
else:
|
||
|
|
status = 0
|
||
|
|
else:
|
||
|
|
try:
|
||
|
|
with open(os.path.join(FAN_PATH, self.fan_presence_path), 'r') as presence_status:
|
||
|
|
status = int(presence_status.read())
|
||
|
|
except (ValueError, IOError):
|
||
|
|
status = 0
|
||
|
|
|
||
|
|
return status == 1
|
||
|
|
|
||
|
|
def _get_min_speed_in_rpm(self):
|
||
|
|
speed = 0
|
||
|
|
try:
|
||
|
|
with open(os.path.join(FAN_PATH, self.fan_min_speed_path), 'r') as min_fan_speed:
|
||
|
|
speed = int(min_fan_speed.read())
|
||
|
|
except (ValueError, IOError):
|
||
|
|
speed = 0
|
||
|
|
|
||
|
|
return speed
|
||
|
|
|
||
|
|
def _get_max_speed_in_rpm(self):
|
||
|
|
speed = 0
|
||
|
|
try:
|
||
|
|
with open(os.path.join(FAN_PATH, self.fan_max_speed_path), 'r') as max_fan_speed:
|
||
|
|
speed = int(max_fan_speed.read())
|
||
|
|
except (ValueError, IOError):
|
||
|
|
speed = 0
|
||
|
|
|
||
|
|
return speed
|
||
|
|
|
||
|
|
def get_speed(self):
|
||
|
|
"""
|
||
|
|
Retrieves the speed of fan
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
int: percentage of the max fan speed
|
||
|
|
"""
|
||
|
|
speed = 0
|
||
|
|
try:
|
||
|
|
with open(os.path.join(FAN_PATH, self.fan_speed_get_path), 'r') as fan_curr_speed:
|
||
|
|
speed_in_rpm = int(fan_curr_speed.read())
|
||
|
|
except (ValueError, IOError):
|
||
|
|
speed_in_rpm = 0
|
||
|
|
|
||
|
|
max_speed_in_rpm = self._get_max_speed_in_rpm()
|
||
|
|
speed = 100*speed_in_rpm/max_speed_in_rpm
|
||
|
|
|
||
|
|
return speed
|
||
|
|
|
||
|
|
def get_target_speed(self):
|
||
|
|
"""
|
||
|
|
Retrieves the expected speed of fan
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
int: percentage of the max fan speed
|
||
|
|
"""
|
||
|
|
speed = 0
|
||
|
|
|
||
|
|
if self.is_psu_fan:
|
||
|
|
# Not like system fan, psu fan speed can not be modified, so target speed is N/A
|
||
|
|
return speed
|
||
|
|
try:
|
||
|
|
with open(os.path.join(FAN_PATH, self.fan_speed_set_path), 'r') as fan_pwm:
|
||
|
|
pwm = int(fan_pwm.read())
|
||
|
|
except (ValueError, IOError):
|
||
|
|
pwm = 0
|
||
|
|
|
||
|
|
speed = int(round(pwm*100.0/PWM_MAX))
|
||
|
|
|
||
|
|
return speed
|
||
|
|
|
||
|
|
def set_speed(self, speed):
|
||
|
|
"""
|
||
|
|
Set fan speed to expected value
|
||
|
|
|
||
|
|
Args:
|
||
|
|
speed: An integer, the percentage of full fan speed to set fan to,
|
||
|
|
in the range 0 (off) to 100 (full speed)
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
bool: True if set success, False if fail.
|
||
|
|
"""
|
||
|
|
status = True
|
||
|
|
pwm = int(round(PWM_MAX*speed/100.0))
|
||
|
|
|
||
|
|
if self.is_psu_fan:
|
||
|
|
#PSU fan speed is not setable.
|
||
|
|
return False
|
||
|
|
|
||
|
|
try:
|
||
|
|
with open(os.path.join(FAN_PATH, self.fan_speed_set_path), 'w') as fan_pwm:
|
||
|
|
fan_pwm.write(str(pwm))
|
||
|
|
except (ValueError, IOError):
|
||
|
|
status = False
|
||
|
|
|
||
|
|
return status
|
||
|
|
|
||
|
|
def _get_led_capability(self):
|
||
|
|
cap_list = None
|
||
|
|
try:
|
||
|
|
with open(os.path.join(LED_PATH, self.fan_led_cap_path), 'r') as fan_led_cap:
|
||
|
|
caps = fan_led_cap.read()
|
||
|
|
cap_list = caps.split()
|
||
|
|
except (ValueError, IOError):
|
||
|
|
status = 0
|
||
|
|
|
||
|
|
return cap_list
|
||
|
|
|
||
|
|
def set_status_led(self, color):
|
||
|
|
"""
|
||
|
|
Set led to expected color
|
||
|
|
|
||
|
|
Args:
|
||
|
|
color: A string representing the color with which to set the
|
||
|
|
fan module status LED
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
bool: True if set success, False if fail.
|
||
|
|
"""
|
||
|
|
led_cap_list = self._get_led_capability()
|
||
|
|
if led_cap_list is None:
|
||
|
|
return False
|
||
|
|
|
||
|
|
if self.is_psu_fan:
|
||
|
|
# PSU fan led status is not able to set
|
||
|
|
return False
|
||
|
|
status = False
|
||
|
|
try:
|
||
|
|
if color == 'green':
|
||
|
|
with open(os.path.join(LED_PATH, self.fan_green_led_path), 'w') as fan_led:
|
||
|
|
fan_led.write(str(LED_ON))
|
||
|
|
elif color == 'red':
|
||
|
|
# Some fan don't support red led but support orange led, in this case we set led to orange
|
||
|
|
if 'red' in led_cap_list:
|
||
|
|
led_path = os.path.join(LED_PATH, self.fan_red_led_path)
|
||
|
|
elif 'orange' in led_cap_list:
|
||
|
|
led_path = os.path.join(LED_PATH, self.fan_orange_led_path)
|
||
|
|
else:
|
||
|
|
return False
|
||
|
|
with open(led_path, 'w') as fan_led:
|
||
|
|
fan_led.write(str(LED_ON))
|
||
|
|
|
||
|
|
elif color == 'off':
|
||
|
|
with open(os.path.join(LED_PATH, self.fan_green_led_path), 'w') as fan_led:
|
||
|
|
fan_led.write(str(LED_OFF))
|
||
|
|
|
||
|
|
with open(os.path.join(LED_PATH, self.fan_red_led_path), 'w') as fan_led:
|
||
|
|
fan_led.write(str(LED_OFF))
|
||
|
|
else:
|
||
|
|
status = False
|
||
|
|
except (ValueError, IOError):
|
||
|
|
status = False
|
||
|
|
return status
|
||
|
|
|
||
|
|
def get_speed_tolerance(self):
|
||
|
|
"""
|
||
|
|
Retrieves the speed tolerance of the fan
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
An integer, the percentage of variance from target speed which is
|
||
|
|
considered tolerable
|
||
|
|
"""
|
||
|
|
# The tolerance value is fixed as 20% for all the Mellanox platform
|
||
|
|
return 20
|