294 lines
8.5 KiB
Python
294 lines
8.5 KiB
Python
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# sfputil.py
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#
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# Platform-specific SFP transceiver interface for SONiC
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#
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try:
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import time
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from ctypes import create_string_buffer
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from sonic_sfp.sfputilbase import SfpUtilBase
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except ImportError as e:
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raise ImportError("%s - required module not found" % str(e))
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class SfpUtil(SfpUtilBase):
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"""Platform-specific SfpUtil class"""
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PORT_START = 1
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QSFP_PORT_END = 32
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PORT_END = 34
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PORTS_IN_BLOCK = 34
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BASE_OOM_PATH = "/sys/bus/i2c/devices/{0}-0050/"
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BASE_CPLD2_PATH = "/sys/bus/i2c/devices/10-0061/"
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BASE_CPLD3_PATH = "/sys/bus/i2c/devices/10-0062/"
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_port_to_is_present = {}
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_port_to_lp_mode = {}
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_port_to_eeprom_mapping = {}
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_port_to_i2c_mapping = {
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1: 17,
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2: 18,
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3: 19,
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4: 20,
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5: 21,
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6: 22,
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7: 23,
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8: 24,
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9: 25,
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10: 26,
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11: 27,
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12: 28,
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13: 29,
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14: 30,
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15: 31,
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16: 32,
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17: 33,
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18: 34,
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19: 35,
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20: 36,
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21: 37,
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22: 38,
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23: 39,
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24: 40,
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25: 41,
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26: 42,
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27: 43,
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28: 44,
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29: 45,
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30: 46,
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31: 47,
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32: 48,
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33: 49,
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34: 50,
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}
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@property
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def port_start(self):
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return self.PORT_START
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@property
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def port_end(self):
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return self.PORT_END
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@property
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def qsfp_ports(self):
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return list(range(self.PORT_START, self.PORTS_IN_BLOCK - 1))
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@property
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def port_to_eeprom_mapping(self):
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return self._port_to_eeprom_mapping
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def __init__(self):
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eeprom_path = self.BASE_OOM_PATH + "eeprom"
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for x in range(self.port_start, self.port_end+1):
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self.port_to_eeprom_mapping[x] = eeprom_path.format(
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self._port_to_i2c_mapping[x]
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)
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SfpUtilBase.__init__(self)
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def __write_txt_file(self, file_path, value):
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try:
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reg_file = open(file_path, "w")
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except IOError as e:
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print("Error: unable to open file: %s" % str(e))
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return False
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reg_file.write(str(value))
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reg_file.close()
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return True
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def get_presence(self, port_num):
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if port_num <= 16:
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present_path = self.BASE_CPLD2_PATH + "module_present_" + str(port_num)
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else:
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present_path = self.BASE_CPLD3_PATH + "module_present_" + str(port_num)
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self.__port_to_is_present = present_path
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try:
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val_file = open(present_path)
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content = val_file.readline().rstrip()
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val_file.close()
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except IOError as e:
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print("Error: unable to access file: %s" % str(e))
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return False
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if content == "1":
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return True
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return False
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def get_low_power_mode(self, port_num):
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if port_num > self.QSFP_PORT_END: #sfp not support lpmode
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return False
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try:
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eeprom = None
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if not self.get_presence(port_num):
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return False
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eeprom = open(self.port_to_eeprom_mapping[port_num], "rb")
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eeprom.seek(93)
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lpmode = ord(eeprom.read(1))
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if ((lpmode & 0x3) == 0x3):
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return True # Low Power Mode if "Power override" bit is 1 and "Power set" bit is 1
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else:
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# High Power Mode if one of the following conditions is matched:
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# 1. "Power override" bit is 0
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# 2. "Power override" bit is 1 and "Power set" bit is 0
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return False
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except IOError as e:
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print("Error: unable to open file: %s" % str(e))
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return False
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finally:
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if eeprom is not None:
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eeprom.close()
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time.sleep(0.01)
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def set_low_power_mode(self, port_num, lpmode):
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# Check for invalid port_num
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if port_num > self.QSFP_PORT_END: #sfp not support lpmode:
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return False
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try:
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eeprom = None
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if not self.get_presence(port_num):
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return False # Port is not present, unable to set the eeprom
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# Fill in write buffer
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# 0x3:Low Power Mode. "Power override" bit is 1 and "Power set" bit is 1
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# 0x9:High Power Mode. "Power override" bit is 1 ,"Power set" bit is 0 and "High Power Class Enable" bit is 1
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regval = 0x3 if lpmode else 0x9
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buffer = create_string_buffer(1)
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buffer[0] = regval
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# Write to eeprom
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eeprom = open(self.port_to_eeprom_mapping[port_num], "r+b")
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eeprom.seek(93)
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eeprom.write(buffer[0])
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return True
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except IOError as e:
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print("Error: unable to open file: %s" % str(e))
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return False
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finally:
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if eeprom is not None:
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eeprom.close()
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time.sleep(0.01)
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def reset(self, port_num):
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if port_num > self.QSFP_PORT_END: #sfp not support lpmode:
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return False
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if not self.get_presence(port_num):
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return False # Port is not present, unable to set reset
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if port_num < 16:
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mod_rst_path = self.BASE_CPLD2_PATH + "module_reset_" + str(port_num)
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else:
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mod_rst_path = self.BASE_CPLD3_PATH + "module_reset_" + str(port_num)
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self.__port_to_mod_rst = mod_rst_path
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ret = self.__write_txt_file(self.__port_to_mod_rst, 1)
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if ret is not True:
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return ret
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time.sleep(0.2)
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ret = self.__write_txt_file(self.__port_to_mod_rst, 0)
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time.sleep(0.2)
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return ret
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def get_cpld_interrupt(self):
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port_dict = {}
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for i in range(0, 4):
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if i == 0 or i == 1:
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cpld_i2c_path = self.BASE_CPLD2_PATH + "cpld_intr_" + str(i+1)
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else:
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cpld_i2c_path = self.BASE_CPLD3_PATH + "cpld_intr_" + str(i+1)
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start_i = (i*8)
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end_i = (i*8+8)
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try:
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val_file = open(cpld_i2c_path)
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except IOError as e:
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print("Error: unable to open file: %s" % str(e))
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for k in range(start_i, end_i):
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port_dict[k] = 0
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return port_dict
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status = val_file.readline().rstrip()
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val_file.close()
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status = status.strip()
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status = int(status, 16)
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interrupt_status = ~(status & 0xff)
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if interrupt_status:
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port_shift = 0
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for k in range(start_i, end_i):
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if interrupt_status & (0x1 << port_shift):
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port_dict[k] = 1
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else:
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port_dict[k] = 0
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port_shift = port_shift+1
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return port_dict
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def get_transceiver_change_event(self, timeout=0):
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start_time = time.time()
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port_dict = {}
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forever = False
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if timeout == 0:
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forever = True
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elif timeout > 0:
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timeout = timeout / float(1000) # Convert to secs
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else:
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print("get_transceiver_change_event:Invalid timeout value", timeout)
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return False, {}
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end_time = start_time + timeout
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if start_time > end_time:
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print('get_transceiver_change_event:'
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'time wrap / invalid timeout value', timeout)
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return False, {} # Time wrap or possibly incorrect timeout
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# for i in range(self.port_start, self.port_end+1):
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# ori_present[i]=self.get_presence(i)
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while timeout >= 0:
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change_status = 0
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port_dict = self.get_cpld_interrupt()
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present = 0
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for key, value in port_dict.items():
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if value == 1:
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present = self.get_presence(key)
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change_status = 1
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if present:
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port_dict[key] = '1'
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else:
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port_dict[key] = '0'
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if change_status:
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return True, port_dict
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if forever:
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time.sleep(1)
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else:
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timeout = end_time - time.time()
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if timeout >= 1:
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time.sleep(1) # We poll at 1 second granularity
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else:
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if timeout > 0:
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time.sleep(timeout)
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return True, {}
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print("get_evt_change_event: Should not reach here.")
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return False, {}
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