105 lines
4.1 KiB
Python
105 lines
4.1 KiB
Python
#!/usr/bin/env python
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#
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# led_control.py
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#
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# Platform-specific LED control functionality for SONiC
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#
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try:
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from sonic_led.led_control_base import LedControlBase
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except ImportError, e:
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raise ImportError (str(e) + " - required module not found")
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class LedControl(LedControlBase):
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"""Platform specific LED control class"""
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SONIC_PORT_NAME_PREFIX = "Ethernet"
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LED_SYSFS_PATH_BREAKOUT_CAPABLE = "/sys/class/leds/qsfp{0}_{1}/brightness"
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LED_SYSFS_PATH_NO_BREAKOUT = "/sys/class/leds/qsfp{0}/brightness"
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QSFP_BREAKOUT_START_IDX = 1
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QSFP_BREAKOUT_END_IDX = 24
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QSFP_NO_BREAKOUT_START_IDX = 25
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QSFP_NO_BREAKOUT_END_IDX = 32
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LED_QSFP_OFFSET = 4
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LED_COLOR_OFF = 0
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LED_COLOR_GREEN = 1
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LED_COLOR_YELLOW = 2
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# Helper method to map SONiC port name to Arista QSFP index
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def _port_name_to_qsfp_index(self, port_name):
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# Strip "Ethernet" off port name
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if not port_name.startswith(self.SONIC_PORT_NAME_PREFIX):
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return -1
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sonic_port_num = int(port_name[len(self.SONIC_PORT_NAME_PREFIX):])
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# SONiC port nums are 0-based and increment by 4
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# Arista QSFP indices are 1-based and increment by 1
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return ((sonic_port_num/4) + 1)
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# Concrete implementation of port_link_state_change() method
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def port_link_state_change(self, port, state):
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qsfp_index = self._port_name_to_qsfp_index(port)
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# Ignore invalid QSFP indices
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if qsfp_index <= 0:
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return
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# QSFP indices 1-24 are breakout-capable and have four LEDs, and each LED indicate one lane.
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# whereas indices 25-32 are not breakout-capable, and only have one
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if qsfp_index <= self.QSFP_BREAKOUT_END_IDX:
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# assuming 40G, then we need to control four lanes
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led_sysfs_paths = [ self.LED_SYSFS_PATH_BREAKOUT_CAPABLE.format(qsfp_index + self.LED_QSFP_OFFSET, i) for i in range(1, 5) ]
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else:
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led_sysfs_paths = [ self.LED_SYSFS_PATH_NO_BREAKOUT.format(qsfp_index + self.LED_QSFP_OFFSET) ]
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for led_sysfs_path in led_sysfs_paths:
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led_file = open(led_sysfs_path, "w")
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if state == "up":
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led_file.write("%d" % self.LED_COLOR_GREEN)
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else:
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led_file.write("%d" % self.LED_COLOR_OFF)
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led_file.close()
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# Constructor
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def __init__(self):
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# Initialize all front-panel status LEDs to green
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with open("/sys/class/leds/status/brightness", "w") as f:
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f.write("1")
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with open("/sys/class/leds/fan_status/brightness", "w") as f:
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f.write("1")
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with open("/sys/class/leds/psu1/brightness", "w") as f:
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f.write("1")
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with open("/sys/class/leds/psu2/brightness", "w") as f:
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f.write("1")
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# Initialize all fan LEDs to green
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with open("/sys/devices/pci0000:00/0000:00:02.2/0000:02:00.0/i2c-3/3-0060/hwmon/hwmon4/fan1_led", "w") as f:
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f.write("1")
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with open("/sys/devices/pci0000:00/0000:00:02.2/0000:02:00.0/i2c-3/3-0060/hwmon/hwmon4/fan2_led", "w") as f:
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f.write("1")
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with open("/sys/devices/pci0000:00/0000:00:02.2/0000:02:00.0/i2c-3/3-0060/hwmon/hwmon4/fan3_led", "w") as f:
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f.write("1")
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with open("/sys/devices/pci0000:00/0000:00:02.2/0000:02:00.0/i2c-3/3-0060/hwmon/hwmon4/fan4_led", "w") as f:
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f.write("1")
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# Initialize: Turn all front panel QSFP LEDs off
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for qsfp_index in range(self.QSFP_BREAKOUT_START_IDX, self.QSFP_BREAKOUT_END_IDX + 1):
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for lane in range(1, 5):
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led_sysfs_path = self.LED_SYSFS_PATH_BREAKOUT_CAPABLE.format(qsfp_index + self.LED_QSFP_OFFSET, lane)
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with open(led_sysfs_path, 'w') as led_file:
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led_file.write("%d" % self.LED_COLOR_OFF)
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for qsfp_index in range(self.QSFP_NO_BREAKOUT_START_IDX, self.QSFP_NO_BREAKOUT_END_IDX + 1):
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led_sysfs_path = self.LED_SYSFS_PATH_NO_BREAKOUT.format(qsfp_index + self.LED_QSFP_OFFSET)
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with open(led_sysfs_path, 'w') as led_file:
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led_file.write("%d" % self.LED_COLOR_OFF)
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