df89f6dcb6
#### Why I did it - The xcvrd service requires an event detection function, unplug or plug in the transceiver. #### How I did it - Add sysfs interrupt to notify userspace app of external interrupt - Implement get_change_event() in chassis api. - Also begin installing Python 3 sonic-platform package for Celestica platforms
257 lines
8.7 KiB
Python
257 lines
8.7 KiB
Python
#############################################################################
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# Celestica
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#
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# Module contains an implementation of SONiC Platform Base API and
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# provides the fan status which are available in the platform
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#
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#############################################################################
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import json
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import math
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import os.path
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try:
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from sonic_platform_base.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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EMC2305_PATH = "/sys/bus/i2c/drivers/emc2305/"
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FAN_PATH = "/sys/devices/platform/e1031.smc/"
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EMC2305_MAX_PWM = 255
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EMC2305_FAN_PWM = "pwm{}"
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EMC2305_FAN_TARGET = "fan{}_target"
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EMC2305_FAN_INPUT = "pwm{}"
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FAN_NAME_LIST = ["FAN-1", "FAN-2", "FAN-3"]
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PSU_FAN_MAX_RPM = 11000
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PSU_HWMON_PATH = "/sys/bus/i2c/devices/i2c-{0}/{0}-00{1}/hwmon"
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PSU_I2C_MAPPING = {
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0: {
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"num": 13,
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"addr": "5b"
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},
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1: {
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"num": 12,
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"addr": "5a"
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},
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}
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class Fan(FanBase):
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"""Platform-specific Fan class"""
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def __init__(self, fan_tray_index, fan_index=0, is_psu_fan=False, psu_index=0):
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self.fan_index = fan_index
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self.fan_tray_index = fan_tray_index
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self.is_psu_fan = is_psu_fan
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if self.is_psu_fan:
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self.psu_index = psu_index
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self.psu_i2c_num = PSU_I2C_MAPPING[self.psu_index]["num"]
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self.psu_i2c_addr = PSU_I2C_MAPPING[self.psu_index]["addr"]
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self.psu_hwmon_path = PSU_HWMON_PATH.format(
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self.psu_i2c_num, self.psu_i2c_addr)
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# e1031 fan attributes
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# Single emc2305 chip located at i2c-23-4d
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# to control a fan module
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self.emc2305_chip_mapping = [
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{
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'device': "23-004d",
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'index_map': [1, 2, 4]
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}
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]
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self.fan_e1031_presence = "fan{}_prs"
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self.fan_e1031_direction = "fan{}_dir"
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self.fan_e1031_led = "fan{}_led"
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self.fan_e1031_led_col_map = {
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self.STATUS_LED_COLOR_GREEN: "green",
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self.STATUS_LED_COLOR_RED: "amber",
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self.STATUS_LED_COLOR_OFF: "off"
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}
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FanBase.__init__(self)
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def __read_txt_file(self, file_path):
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try:
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with open(file_path, 'r') as fd:
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data = fd.read()
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return data.strip()
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except IOError:
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pass
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return ""
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def __write_txt_file(self, file_path, value):
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try:
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with open(file_path, 'w') as fd:
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fd.write(str(value))
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except:
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return False
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return True
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def __search_file_by_name(self, directory, file_name):
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for dirpath, dirnames, files in os.walk(directory):
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for name in files:
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file_path = os.path.join(dirpath, name)
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if name in file_name:
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return file_path
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return None
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def get_direction(self):
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"""
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Retrieves the direction of fan
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Returns:
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A string, either FAN_DIRECTION_INTAKE or FAN_DIRECTION_EXHAUST
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depending on fan direction
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"""
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direction = self.FAN_DIRECTION_EXHAUST
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if not self.is_psu_fan:
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fan_direction_file = (FAN_PATH +
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self.fan_e1031_direction.format(self.fan_tray_index+1))
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raw = self.__read_txt_file(fan_direction_file).strip('\r\n')
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direction = self.FAN_DIRECTION_INTAKE if str(
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raw).upper() == "F2B" else self.FAN_DIRECTION_EXHAUST
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return direction
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def get_speed(self):
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"""
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Retrieves the speed of fan as a percentage of full speed
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Returns:
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An integer, the percentage of full fan speed, in the range 0 (off)
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to 100 (full speed)
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Note:
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speed = pwm_in/255*100
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"""
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speed = 0
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if self.is_psu_fan:
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fan_speed_sysfs_name = "fan{}_input".format(self.fan_index+1)
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fan_speed_sysfs_path = self.__search_file_by_name(
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self.psu_hwmon_path, fan_speed_sysfs_name)
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fan_speed_rpm = self.__read_txt_file(fan_speed_sysfs_path) or 0
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fan_speed_raw = float(fan_speed_rpm)/PSU_FAN_MAX_RPM * 100
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speed = math.ceil(float(fan_speed_rpm) * 100 / PSU_FAN_MAX_RPM)
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elif self.get_presence():
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chip = self.emc2305_chip_mapping[self.fan_index]
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device = chip['device']
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fan_index = chip['index_map']
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sysfs_path = "%s%s/%s" % (
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EMC2305_PATH, device, EMC2305_FAN_INPUT)
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sysfs_path = sysfs_path.format(fan_index[self.fan_tray_index])
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raw = self.__read_txt_file(sysfs_path).strip('\r\n')
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pwm = int(raw, 10) if raw else 0
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speed = math.ceil(float(pwm * 100 / EMC2305_MAX_PWM))
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return int(speed)
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def get_target_speed(self):
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"""
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Retrieves the target (expected) speed of the fan
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Returns:
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An integer, the percentage of full fan speed, in the range 0 (off)
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to 100 (full speed)
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Note:
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speed_pc = pwm_target/255*100
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0 : when PWM mode is use
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pwm : when pwm mode is not use
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"""
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target = 0
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if not self.is_psu_fan:
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chip = self.emc2305_chip_mapping[self.fan_index]
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device = chip['device']
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fan_index = chip['index_map']
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sysfs_path = "%s%s/%s" % (
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EMC2305_PATH, device, EMC2305_FAN_TARGET)
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sysfs_path = sysfs_path.format(fan_index[self.fan_tray_index])
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raw = self.__read_txt_file(sysfs_path).strip('\r\n')
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pwm = int(raw, 10) if raw else 0
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target = math.ceil(float(pwm) * 100 / EMC2305_MAX_PWM)
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return target
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def get_speed_tolerance(self):
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"""
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Retrieves the speed tolerance of the fan
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Returns:
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An integer, the percentage of variance from target speed which is
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considered tolerable
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"""
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return 10
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def set_speed(self, speed):
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"""
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Sets the fan speed
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Args:
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speed: An integer, the percentage of full fan speed to set fan to,
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in the range 0 (off) to 100 (full speed)
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Returns:
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A boolean, True if speed is set successfully, False if not
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Note:
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Depends on pwm or target mode is selected:
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1) pwm = speed_pc * 255 <-- Currently use this mode.
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2) target_pwm = speed_pc * 100 / 255
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2.1) set pwm{}_enable to 3
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"""
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pwm = speed * 255 / 100
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if not self.is_psu_fan and self.get_presence():
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chip = self.emc2305_chip_mapping[self.fan_index]
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device = chip['device']
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fan_index = chip['index_map']
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sysfs_path = "%s%s/%s" % (
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EMC2305_PATH, device, EMC2305_FAN_PWM)
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sysfs_path = sysfs_path.format(fan_index[self.fan_tray_index])
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return self.__write_txt_file(sysfs_path, int(pwm))
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return False
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def set_status_led(self, color):
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"""
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Sets the state of the fan module 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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fan module 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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"""
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set_status_led = False
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if not self.is_psu_fan:
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fan_led_file = (FAN_PATH +
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self.fan_e1031_led.format(self.fan_tray_index+1))
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set_status_led = self.__write_txt_file(
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fan_led_file, self.fan_e1031_led_col_map[color]) if self.get_presence() else False
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return set_status_led
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def get_name(self):
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"""
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Retrieves the name of the device
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Returns:
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string: The name of the device
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"""
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fan_name = FAN_NAME_LIST[self.fan_tray_index] if not self.is_psu_fan else "PSU-{} FAN-{}".format(
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self.psu_index+1, self.fan_index+1)
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return fan_name
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def get_presence(self):
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"""
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Retrieves the presence of the PSU
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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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fan_direction_file = (FAN_PATH +
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self.fan_e1031_presence.format(self.fan_tray_index+1))
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present_str = self.__read_txt_file(fan_direction_file) or '1'
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return int(present_str) == 0 if not self.is_psu_fan else True
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def get_status(self):
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"""
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Retrieves the operational status of the device
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Returns:
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A boolean value, True if device is operating properly, False if not
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"""
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return self.get_presence() and self.get_speed() > 0 |