144 lines
5.2 KiB
Python
144 lines
5.2 KiB
Python
#!/usr/bin/env python
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import glob
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import logging
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import re
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import sys
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from time import sleep
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import yaml
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from simple_pid import PID
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SYSFS_HWMON_BASE = "/sys/class/hwmon/"
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class ThermalZone:
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def __init__(self, config, hwmon_map) -> None:
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self.fans = config["fan"]
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self.temp_source = config["source"]
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self.pid = PID(config["pid"]["p"], config["pid"]["i"], config["pid"]["d"], setpoint=0)
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self.pid.output_limits = (0, 255)
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self.factor = 1 / config["factor"]
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self.name = config["name"]
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self.target = config["target"]
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self.hwname = config["hwmon"]
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self.hwmap = hwmon_map
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self.alias_replace = re.compile('|'.join(self.hwmap.keys()))
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self.setup_pwm()
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logging.getLogger("pyfan").info(
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"[{zone}] Source={source} Fans={fans} Factor={factor} PID={pid}".format(zone=self.name,
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source=self.temp_source,
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fans=self.fans,
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factor=self.factor,
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pid=(
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self.pid.Kp, self.pid.Ki,
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self.pid.Kd)))
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def eval(self):
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diff = self.target - self.get_temp()
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val = self.pid(diff)
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try:
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for target_fan in self.fans:
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if type(target_fan) is dict:
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self.write_sysfs(list(target_fan.keys())[0], min(int(val), list(target_fan.values())[0]))
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else:
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self.write_sysfs(target_fan, int(val))
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except OSError as err:
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logging.getLogger("pyfan").warning(
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"[%s] Failed to set pwm, trying to reset it. (%s)" % (self.name, err.strerror))
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self.setup_pwm(1)
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p, i, d = self.pid.components
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logging.getLogger("pyfan").debug(
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"[{name}] {val}% ({diff}C/{temp}C) ({p}|{i}|{d})".format(name=self.name, val=int(val / 255 * 100),
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diff=diff,
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temp=self.get_temp(), p=int(p), i=int(i),
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d=int(d)))
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def get_temp(self):
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return float(self.read_sysfs(self.temp_source)) * self.factor
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def restore(self):
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self.setup_pwm(2)
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def setup_pwm(self, value=1):
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for target_fan in self.fans:
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try:
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if type(target_fan) is dict:
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self.set_pwm_mode(list(target_fan.keys())[0], value)
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else:
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self.set_pwm_mode(target_fan, value)
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except FileNotFoundError as err:
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logging.getLogger("pyfan").warning("[%s] pwm not found. Not ready yet or wrong path? (%s)" % (self.name,
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err.strerror))
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def replace_alias(self, path):
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replaced = self.alias_replace.sub(lambda x: self.hwmap[x.group()], path)
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logging.getLogger("pyfan").debug("[ALIAS] %s -> %s" % (path, replaced))
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return replaced
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def build_pwm_path(self, specific):
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return self.replace_alias(SYSFS_HWMON_BASE + specific)
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def write_sysfs(self, path, value):
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with open(self.build_pwm_path(path), 'w') as sysfs_f:
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sysfs_f.write(str(value))
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def read_sysfs(self, path):
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with open(self.build_pwm_path(path)) as sysfs_f:
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return sysfs_f.readline()
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def set_pwm_mode(self, path, value=1):
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self.write_sysfs(path + "_enable", value)
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class PyFan:
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def __init__(self, config="/etc/pyfan") -> None:
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self.config = self.__load_config(config)
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logging.basicConfig(level=logging.getLevelName(self.config["loglevel"]))
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self.zones = []
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self.hwmon_map = {}
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self.gen_hwmon_map()
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for zone in self.config["thermalzones"]:
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self.zones.append(ThermalZone(zone, self.hwmon_map))
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logging.getLogger("pyfan").info("Finished creating %d thermal zones." % len(self.zones))
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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for zone in self.zones:
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zone.restore()
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def eval(self):
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for zone in self.zones:
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zone.eval()
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@staticmethod
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def __load_config(path):
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with open(path) as cfg_file:
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return yaml.safe_load(cfg_file)
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def gen_hwmon_map(self):
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names = glob.glob(SYSFS_HWMON_BASE + "hwmon*/name")
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for name in names:
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hwmon = name.split("/")[-2]
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with open(name) as file:
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hwname = file.read().strip()
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self.hwmon_map[hwname] = hwmon
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if __name__ == "__main__":
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with PyFan() as pyfan:
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while True:
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try:
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pyfan.eval()
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sleep(1)
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except KeyboardInterrupt:
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sys.exit(0)
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