349 lines
11 KiB
Python
349 lines
11 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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import os, re, socket
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from sonic_sfp.sfputilbase import SfpUtilBase
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from collections import OrderedDict
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from sonic_sfp.sff8472 import sff8472Dom
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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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SFP_TEMPE_OFFSET = 96
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SFP_TEMPE_WIDTH = 2
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SFP_VLOT_OFFSET = 98
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SFP_VOLT_WIDTH = 2
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SFP_CHANNL_MON_OFFSET = 100
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SFP_CHANNL_MON_WIDTH = 6
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NETLINK_KOBJECT_UEVENT = 15
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monitor = None
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class SWPSEventMonitor(object):
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def __init__(self):
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self.recieved_events = OrderedDict()
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self.socket = socket.socket(socket.AF_NETLINK, socket.SOCK_DGRAM, NETLINK_KOBJECT_UEVENT)
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def start(self):
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self.socket.bind((os.getpid(), -1))
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def stop(self):
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self.socket.close()
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def __enter__(self):
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self.start()
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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self.stop()
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def __iter__(self):
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global monitor
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while True:
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for item in monitor.next_events():
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yield item
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def next_events(self):
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data = self.socket.recv(16384)
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event = {}
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for item in data.split(b'\x00'):
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if not item:
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# check if we have an event and if we already received it
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if event and event['SEQNUM'] not in self.recieved_events:
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self.recieved_events[event['SEQNUM']] = None
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if (len(self.recieved_events) > 100):
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self.recieved_events.popitem(last=False)
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yield event
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event = {}
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else:
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try:
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k, v = item.split(b'=', 1)
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event[k.decode('ascii')] = v.decode('ascii')
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except ValueError:
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pass
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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 = 31
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PORTS_IN_BLOCK = 32
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_port_to_eeprom_mapping = {}
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port_to_i2cbus_mapping = {
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0:12,
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1:13,
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2:14,
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3:15,
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4:16,
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5:17,
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6:18,
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7:19,
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8:20,
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9:21,
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10:22,
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11:23,
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12:24,
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13:25,
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14:26,
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15:27,
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16:28,
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17:29,
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18:30,
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19:31,
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20:32,
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21:33,
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22:34,
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23:35,
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24:36,
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25:37,
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26:38,
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27:39,
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28:40,
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29:41,
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30:42,
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31:43
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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 range(0, 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 = "/sys/class/i2c-adapter/i2c-{0}/{0}-0050/eeprom"
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for x in range(0, self.port_end + 1):
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port_eeprom_path = eeprom_path.format(self.port_to_i2cbus_mapping[x])
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self.port_to_eeprom_mapping[x] = port_eeprom_path
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self.phy_port_dict = {}
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SfpUtilBase.__init__(self)
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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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try:
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reg_file = open("/sys/class/swps/port"+str(port_num)+"/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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reg_value = int(reg_file.readline().rstrip())
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if reg_value == 0:
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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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# 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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try:
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reg_file = open("/sys/class/swps/port"+str(port_num)+"/lpmod")
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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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reg_value = int(reg_file.readline().rstrip())
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if reg_value == 0:
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return False
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return True
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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.port_start or port_num > self.port_end:
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return False
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try:
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reg_file = open("/sys/class/swps/port"+str(port_num)+"/lpmod", "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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lpmode = int(reg_file.readline().rstrip())
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# LPMode is active high; set or clear the bit accordingly
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if lpmode is True:
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reg_value = 1
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else:
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reg_value = 0
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reg_file.write(hex(reg_value))
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reg_file.close()
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return True
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def reset(self, port_num):
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QSFP_RESET_REGISTER_DEVICE_FILE = "/sys/class/swps/port"+str(port_num)+"/reset"
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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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try:
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reg_file = open(QSFP_RESET_REGISTER_DEVICE_FILE, "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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reg_value = 0
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reg_file.write(hex(reg_value))
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reg_file.close()
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# Sleep 2 second to allow it to settle
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time.sleep(2)
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# Flip the value back write back to the register to take port out of reset
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try:
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reg_file = open(QSFP_RESET_REGISTER_DEVICE_FILE, "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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reg_value = 1
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reg_file.write(hex(reg_value))
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reg_file.close()
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return True
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def _get_port_eeprom_path(self, port_num, devid):
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sysfs_i2c_adapter_base_path = "/sys/class/i2c-adapter"
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if devid == self.IDENTITY_EEPROM_ADDR :
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return SfpUtilBase._get_port_eeprom_path(self, port_num, devid)
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else:
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i2c_adapter_id = self._get_port_i2c_adapter_id(port_num)
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if i2c_adapter_id is None:
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print("Error getting i2c bus num")
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return None
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# Get i2c virtual bus path for the sfp
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sysfs_sfp_i2c_adapter_path = "%s/i2c-%s" % (sysfs_i2c_adapter_base_path,
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str(i2c_adapter_id))
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# If i2c bus for port does not exist
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if not os.path.exists(sysfs_sfp_i2c_adapter_path):
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print("Could not find i2c bus %s. Driver not loaded?" % sysfs_sfp_i2c_adapter_path)
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return None
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sysfs_sfp_i2c_client_path = "%s/%s-00%s" % (sysfs_sfp_i2c_adapter_path,
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str(i2c_adapter_id),
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hex(devid)[-2:])
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# If sfp device is not present on bus, Add it
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if not os.path.exists(sysfs_sfp_i2c_client_path):
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ret = self._add_new_sfp_device(
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sysfs_sfp_i2c_adapter_path, devid)
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if ret != 0:
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print("Error adding sfp device")
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return None
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sysfs_sfp_i2c_client_eeprom_path = "%s/eeprom" % sysfs_sfp_i2c_client_path
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return sysfs_sfp_i2c_client_eeprom_path
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def get_transceiver_dom_info_dict(self, port_num):
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if port_num in self.qsfp_ports:
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return SfpUtilBase.get_transceiver_dom_info_dict(self, port_num)
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else:
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transceiver_dom_info_dict = {}
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offset = 0
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file_path = self._get_port_eeprom_path(port_num, self.DOM_EEPROM_ADDR)
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if not self._sfp_eeprom_present(file_path, 0):
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return None
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try:
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sysfsfile_eeprom = open(file_path, "rb")
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except IOError:
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print("Error: reading sysfs file %s" % file_path)
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return None
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sfpd_obj = sff8472Dom(None, 1)
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if sfpd_obj is None:
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return None
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dom_temperature_raw = self._read_eeprom_specific_bytes(sysfsfile_eeprom, (offset + SFP_TEMPE_OFFSET), SFP_TEMPE_WIDTH)
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if dom_temperature_raw is not None:
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print(dom_temperature_raw)
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dom_temperature_data = sfpd_obj.parse_temperature(dom_temperature_raw, 0)
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print(dom_temperature_data)
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else:
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return None
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dom_voltage_raw = self._read_eeprom_specific_bytes(sysfsfile_eeprom, (offset + SFP_VLOT_OFFSET), SFP_VOLT_WIDTH)
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if dom_voltage_raw is not None:
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print(dom_voltage_raw)
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dom_voltage_data = sfpd_obj.parse_voltage(dom_voltage_raw, 0)
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else:
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return None
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dom_channel_monitor_raw = self._read_eeprom_specific_bytes(sysfsfile_eeprom, (offset + SFP_CHANNL_MON_OFFSET), SFP_CHANNL_MON_WIDTH)
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if dom_channel_monitor_raw is not None:
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dom_channel_monitor_data = sfpd_obj.parse_channel_monitor_params(dom_channel_monitor_raw, 0)
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else:
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return None
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try:
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sysfsfile_eeprom.close()
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except IOError:
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print("Error: closing sysfs file %s" % file_path)
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return None
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transceiver_dom_info_dict['temperature'] = dom_temperature_data['data']['Temperature']['value']
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transceiver_dom_info_dict['voltage'] = dom_voltage_data['data']['Vcc']['value']
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transceiver_dom_info_dict['rx1power'] = dom_channel_monitor_data['data']['RXPower']['value']
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transceiver_dom_info_dict['rx2power'] = 'N/A'
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transceiver_dom_info_dict['rx3power'] = 'N/A'
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transceiver_dom_info_dict['rx4power'] = 'N/A'
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transceiver_dom_info_dict['tx1bias'] = dom_channel_monitor_data['data']['TXBias']['value']
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transceiver_dom_info_dict['tx2bias'] = 'N/A'
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transceiver_dom_info_dict['tx3bias'] = 'N/A'
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transceiver_dom_info_dict['tx4bias'] = 'N/A'
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transceiver_dom_info_dict['tx1power'] = dom_channel_monitor_data['data']['TXPower']['value']
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transceiver_dom_info_dict['tx2power'] = 'N/A'
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transceiver_dom_info_dict['tx3power'] = 'N/A'
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transceiver_dom_info_dict['tx4power'] = 'N/A'
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return transceiver_dom_info_dict
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def get_transceiver_change_event(self, timeout=0):
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global monitor
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port_dict = {}
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with SWPSEventMonitor() as monitor:
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for event in monitor:
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if event['SUBSYSTEM'] == 'swps':
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#print('SWPS event. From %s, ACTION %s, IF_TYPE %s, IF_LANE %s' % (event['DEVPATH'], event['ACTION'], event['IF_TYPE'], event['IF_LANE']))
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portname = event['DEVPATH'].split("/")[-1]
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rc = re.match(r"port(?P<num>\d+)",portname)
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if rc is not None:
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if event['ACTION'] == "remove":
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remove_num = int(rc.group("num"))
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port_dict[remove_num] = "0"
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#port_dict[rc.group("num")] = "0"
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if event['ACTION'] == "add":
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add_num = int(rc.group("num"))
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port_dict[add_num] = "1"
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#port_dict[rc.group("num")] = "1"
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return True, port_dict
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return False, {}
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