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[Mellanox] Support max/min speed for PSU fan (#5682)

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As new hw-mgmt expose the sysfs for PSU fan max speed, we need support max/min speed for PSU fan in mellanox platform API.
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Junchao-Mellanox 2020-10-27 03:47:12 +08:00 committed by GitHub
parent e66d49a57c
commit 7bee5093f1
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 81 additions and 65 deletions
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89
platform/mellanox/mlnx-platform-api/sonic_platform/fan.py
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@ -14,6 +14,7 @@ import subprocess
try:
from sonic_platform_base.fan_base import FanBase
from .led import FanLed, ComponentFaultyIndicator
from .utils import read_int_from_file, read_str_from_file, write_file
except ImportError as e:
raise ImportError (str(e) + "- required module not found")
@ -52,17 +53,18 @@ class Fan(FanBase):
else:
self.led = FanLed(self.index)
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_max_speed_path = "fan{}_max".format(self.index)
self.fan_max_speed_path = os.path.join(FAN_PATH, "fan{}_max".format(self.index))
self.fan_min_speed_path = os.path.join(FAN_PATH, "fan{}_min".format(self.index))
self._name = "fan{}".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._name = 'psu_{}_fan_{}'.format(self.index, 1)
self.fan_max_speed_path = None
self.fan_max_speed_path = os.path.join(CONFIG_PATH, "psu_fan_max")
self.fan_min_speed_path = os.path.join(CONFIG_PATH, "psu_fan_min")
self.psu_i2c_bus_path = os.path.join(CONFIG_PATH, 'psu{0}_i2c_bus'.format(self.index))
self.psu_i2c_addr_path = os.path.join(CONFIG_PATH, 'psu{0}_i2c_addr'.format(self.index))
self.psu_i2c_command_path = os.path.join(CONFIG_PATH, 'fan_command')
@ -109,11 +111,7 @@ class Fan(FanBase):
if self.is_psu_fan:
status = 0
else:
try:
with open(os.path.join(FAN_PATH, self.fan_status_path), 'r') as fault_status:
status = int(fault_status.read().strip())
except (ValueError, IOError):
status = 1
status = read_int_from_file(os.path.join(FAN_PATH, self.fan_status_path), 1)
return status == 0
@ -135,29 +133,6 @@ class Fan(FanBase):
else:
return self.fan_drawer.get_presence()
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().strip())
except (ValueError, IOError):
speed = 0
return speed
def get_speed(self):
"""
Retrieves the speed of fan
@ -166,17 +141,12 @@ class Fan(FanBase):
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().strip())
except (ValueError, IOError):
speed_in_rpm = 0
speed_in_rpm = read_int_from_file(os.path.join(FAN_PATH, self.fan_speed_get_path))
if self.fan_max_speed_path is None:
# in case of max speed unsupported, we just return speed in unit of RPM.
max_speed_in_rpm = read_int_from_file(self.fan_max_speed_path)
if max_speed_in_rpm == 0:
return speed_in_rpm
max_speed_in_rpm = self._get_max_speed_in_rpm()
speed = 100*speed_in_rpm/max_speed_in_rpm
if speed > 100:
speed = 100
@ -192,18 +162,15 @@ class Fan(FanBase):
int: percentage of the max fan speed
"""
if self.is_psu_fan:
# Not like system fan, psu fan speed can not be modified, so target speed is N/A
return self.get_speed()
try:
# Get PSU fan target speed according to current system cooling level
cooling_level = self.get_cooling_level()
return int(self.PSU_FAN_SPEED[cooling_level], 16)
except Exception:
return self.get_speed()
try:
with open(os.path.join(FAN_PATH, self.fan_speed_set_path), 'r') as fan_pwm:
pwm = int(fan_pwm.read().strip())
except (ValueError, IOError):
pwm = 0
speed = int(round(pwm*100.0/PWM_MAX))
return speed
pwm = read_int_from_file(os.path.join(FAN_PATH, self.fan_speed_set_path))
return int(round(pwm*100.0/PWM_MAX))
def set_speed(self, speed):
@ -224,12 +191,9 @@ class Fan(FanBase):
return False
from .thermal import logger
try:
with open(self.psu_i2c_bus_path, 'r') as f:
bus = f.read().strip()
with open(self.psu_i2c_addr_path, 'r') as f:
addr = f.read().strip()
with open(self.psu_i2c_command_path, 'r') as f:
command = f.read().strip()
bus = read_str_from_file(self.psu_i2c_bus_path, raise_exception=True)
addr = read_str_from_file(self.psu_i2c_addr_path, raise_exception=True)
command = read_str_from_file(self.psu_i2c_command_path, raise_exception=True)
speed = Fan.PSU_FAN_SPEED[int(speed / 10)]
command = "i2cset -f -y {0} {1} {2} {3} wp".format(bus, addr, command, speed)
subprocess.check_call(command, shell = True)
@ -248,8 +212,7 @@ class Fan(FanBase):
speed = self.min_cooling_level * 10
self.set_cooling_level(cooling_level, cooling_level)
pwm = int(round(PWM_MAX*speed/100.0))
with open(os.path.join(FAN_PATH, self.fan_speed_set_path), 'w') as fan_pwm:
fan_pwm.write(str(pwm))
write_file(os.path.join(FAN_PATH, self.fan_speed_set_path), pwm, raise_exception=True)
except (ValueError, IOError):
status = False
@ -311,21 +274,17 @@ class Fan(FanBase):
# Reset FAN cooling level vector. According to low level team,
# if we need set cooling level to X, we need first write a (10+X)
# to cooling_cur_state file to reset the cooling level vector.
with open(COOLING_STATE_PATH, 'w') as cooling_state:
cooling_state.write(str(level + 10))
write_file(COOLING_STATE_PATH, level + 10, raise_exception=True)
# We need set cooling level after resetting the cooling level vector
with open(COOLING_STATE_PATH, 'w') as cooling_state:
cooling_state.write(str(cur_state))
write_file(COOLING_STATE_PATH, cur_state, raise_exception=True)
except (ValueError, IOError) as e:
raise RuntimeError("Failed to set cooling level - {}".format(e))
@classmethod
def get_cooling_level(cls):
try:
with open(COOLING_STATE_PATH, 'r') as cooling_state:
cooling_level = int(cooling_state.read().strip())
return cooling_level
return read_int_from_file(COOLING_STATE_PATH, raise_exception=True)
except (ValueError, IOError) as e:
raise RuntimeError("Failed to get cooling level - {}".format(e))

57
platform/mellanox/mlnx-platform-api/sonic_platform/utils.py Normal file
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@ -0,0 +1,57 @@
def read_str_from_file(file_path, default='', raise_exception=False):
"""
Read string content from file
:param file_path: File path
:param default: Default return value if any exception occur
:param raise_exception: Raise exception to caller if True else just return default value
:return: String content of the file
"""
try:
with open(file_path, 'r') as f:
value = f.read().strip()
except (ValueError, IOError) as e:
if not raise_exception:
value = default
else:
raise e
return value
def read_int_from_file(file_path, default=0, raise_exception=False):
"""
Read content from file and cast it to integer
:param file_path: File path
:param default: Default return value if any exception occur
:param raise_exception: Raise exception to caller if True else just return default value
:return: Integer value of the file content
"""
try:
with open(file_path, 'r') as f:
value = int(f.read().strip())
except (ValueError, IOError) as e:
if not raise_exception:
value = default
else:
raise e
return value
def write_file(file_path, content, raise_exception=False):
"""
Write the given value to a file
:param file_path: File path
:param content: Value to write to the file
:param raise_exception: Raise exception to caller if True
:return: True if write success else False
"""
try:
with open(file_path, 'w') as f:
f.write(str(content))
except (ValueError, IOError) as e:
if not raise_exception:
return False
else:
raise e
return True