309 lines
9.0 KiB
Python
Executable File
309 lines
9.0 KiB
Python
Executable File
# 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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import os
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import string
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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 = 0
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PORT_END = 71
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PORTS_IN_BLOCK = 72
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QSFP_PORT_START = 48
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QSFP_PORT_END = 72
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BASE_VAL_PATH = "/sys/class/i2c-adapter/i2c-{0}/{1}-0050/"
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BASE_OOM_PATH = "/sys/bus/i2c/devices/{0}-0050/"
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BASE_CPLD2_PATH = "/sys/bus/i2c/devices/{0}-0061/"
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BASE_CPLD3_PATH = "/sys/bus/i2c/devices/{0}-0062/"
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I2C_BUS_ORDER = -1
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#The sidebands of QSFP is different.
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#present is in-order.
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#But lp_mode and reset are not.
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qsfp_sb_map = [1, 3, 5, 2, 4, 6]
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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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0: [1, 2],
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1: [2, 3],
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2: [3, 4],
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3: [4, 5],
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4: [5, 6],
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5: [6, 7],
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6: [7, 8],
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7: [8, 9],
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8: [9, 10],
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9: [10, 11],
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10: [11, 12],
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11: [12, 13],
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12: [13, 14],
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13: [14, 15],
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14: [15, 16],
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15: [16, 17],
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16: [17, 18],
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17: [18, 19],
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18: [19, 20],
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19: [20, 21],
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20: [21, 22],
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21: [22, 23],
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22: [23, 24],
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23: [24, 25],
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24: [25, 26],
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25: [26, 27],
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26: [27, 28],
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27: [28, 29],
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28: [29, 30],
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29: [30, 31],
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30: [31, 32],
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31: [32, 33],
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32: [33, 34],
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33: [34, 35],
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34: [35, 36],
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35: [36, 37],
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36: [37, 38],
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37: [38, 39],
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38: [39, 40],
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39: [40, 41],
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40: [41, 42],
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41: [42, 43],
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42: [43, 44],
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43: [44, 45],
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44: [45, 46],
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45: [46, 47],
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46: [47, 48],
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47: [48, 49],
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48: [49, 50],#QSFP49
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49: [49, 50],
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50: [49, 50],
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51: [49, 50],
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52: [50, 52],#QSFP50
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53: [50, 52],
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54: [50, 52],
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55: [50, 52],
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56: [51, 54],#QSFP51
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57: [51, 54],
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58: [51, 54],
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59: [51, 54],
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60: [52, 51],#QSFP52
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61: [52, 51],
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62: [52, 51],
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63: [52, 51],
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64: [53, 53], #QSFP53
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65: [53, 53],
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66: [53, 53],
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67: [53, 53],
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68: [54, 55],#QSFP54
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69: [54, 55],
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70: [54, 55],
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71: [54, 55],
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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_port_start(self):
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return self.QSFP_PORT_START
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@property
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def qsfp_port_end(self):
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return self.QSFP_PORT_END
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@property
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def qsfp_ports(self):
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return range(self.QSFP_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(0, 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][1]
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)
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SfpUtilBase.__init__(self)
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#Two i2c buses might get flipped order, check them both.
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def update_i2c_order(self):
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if self.I2C_BUS_ORDER < 0:
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eeprom_path = "/sys/bus/i2c/devices/1-0057/eeprom"
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if os.path.exists(eeprom_path):
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self.I2C_BUS_ORDER = 0
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eeprom_path = "/sys/bus/i2c/devices/0-0057/eeprom"
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if os.path.exists(eeprom_path):
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self.I2C_BUS_ORDER = 1
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return self.I2C_BUS_ORDER
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def get_presence(self, port_num):
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# Check for invalid port_num
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if port_num < self.port_start or port_num > self.port_end:
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return False
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order = self.update_i2c_order()
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if port_num < 24:
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present_path = self.BASE_CPLD2_PATH.format(order)
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else:
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present_path = self.BASE_CPLD3_PATH.format(order)
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present_path = present_path + "module_present_" + str(self._port_to_i2c_mapping[port_num][0])
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self.__port_to_is_present = present_path
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try:
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val_file = open(self.__port_to_is_present)
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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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content = val_file.readline().rstrip()
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val_file.close()
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# content is a string, either "0" or "1"
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if content == "1":
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return True
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return False
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def qsfp_sb_remap(self, port_num):
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qsfp_start = self.qsfp_port_start
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qsfp_index = self._port_to_i2c_mapping[port_num][0] - qsfp_start
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qsfp_index = self.qsfp_sb_map[qsfp_index-1]
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return qsfp_start+qsfp_index
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def get_low_power_mode_cpld(self, port_num):
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if port_num < self.qsfp_port_start or port_num > self.qsfp_port_end:
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return False
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order = self.update_i2c_order()
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lp_mode_path = self.BASE_CPLD3_PATH.format(order)
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lp_mode_path = lp_mode_path + "module_lp_mode_"
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q = self.qsfp_sb_remap(port_num)
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lp_mode_path = lp_mode_path + str(q)
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try:
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val_file = open(lp_mode_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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return False
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content = val_file.readline().rstrip()
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val_file.close()
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# content is a string, either "0" or "1"
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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_start or port_num > self.qsfp_port_end:
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return False
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if not self.get_presence(port_num):
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return self.get_low_power_mode_cpld(port_num)
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try:
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eeprom = None
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eeprom = open(self.port_to_eeprom_mapping[port_num], mode="rb", buffering=0)
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eeprom.seek(93)
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lpmode = ord(eeprom.read(1))
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if not (lpmode & 0x1): # 'Power override' bit is 0
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return self.get_low_power_mode_cpld(port_num)
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else:
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if ((lpmode & 0x2) == 0x2):
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return True # Low Power Mode if "Power set" bit is 1
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else:
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return False # High Power Mode if "Power set" bit is 0
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except IOError as err:
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print "Error: unable to open file: %s" % str(err)
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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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if port_num < self.qsfp_port_start or port_num > self.qsfp_port_end:
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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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regval = 0x3 if lpmode else 0x1 # 0x3:Low Power Mode, 0x1:High Power Mode
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buffer = create_string_buffer(1)
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buffer[0] = chr(regval)
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# Write to eeprom
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eeprom = open(self.port_to_eeprom_mapping[port_num], mode="r+b", buffering=0)
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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 err:
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print "Error: unable to open file: %s" % str(err)
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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_start or port_num > self.qsfp_port_end:
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return False
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order = self.update_i2c_order()
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lp_mode_path = self.BASE_CPLD3_PATH.format(order)
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mod_rst_path = lp_mode_path + "module_reset_"
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q = self.qsfp_sb_remap(port_num)
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mod_rst_path = mod_rst_path + str(q)
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try:
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reg_file = open(mod_rst_path, 'r+')
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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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#toggle reset
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reg_file.seek(0)
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reg_file.write('0')
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time.sleep(1)
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reg_file.seek(0)
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reg_file.write('1')
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reg_file.close()
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return True
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def get_transceiver_change_event(self):
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"""
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TODO: This function need to be implemented
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when decide to support monitoring SFP(Xcvrd)
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on this platform.
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"""
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raise NotImplementedError
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