256 lines
7.6 KiB
Python
256 lines
7.6 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 datetime
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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_START_SFP = 32
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PORT_END = 33
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PORTS_IN_BLOCK = 34
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EEPROM_OFFSET = 1
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_port_to_eeprom_mapping = {}
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port_dict = {}
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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_start_sfp(self):
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return self.PORT_START_SFP
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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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@property
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def get_transceiver_status(self):
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try:
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reg_file = open("/sys/devices/platform/delta-et-c032if-cpld.0/sfp_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 = reg_file.readline().rstrip()
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reg_file.close()
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return int(content, 16)
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def __init__(self):
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eeprom_path = "/sys/kernel/sfp/eeprom_sfp_{0}"
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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(x + self.EEPROM_OFFSET)
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self.modprs_register = self.get_transceiver_status
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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/devices/platform/delta-et-c032if-cpld.0/sfp_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 = reg_file.readline().rstrip()
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# content is a string containing the hex representation of the register
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reg_value = int(content, 16)
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# Mask off the bit corresponding to our port
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mask = (1 << (self.port_end - port_num + 6))
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# ModPrsL is active low
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if reg_value & mask == 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 - 2:
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return False
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try:
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reg_file = open("/sys/devices/platform/delta-et-c032if-cpld.0/sfp_lp_mode")
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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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content = reg_file.readline().rstrip()
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# content is a string containing the hex representation of the register
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reg_value = int(content, 16)
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# Mask off the bit corresponding to our port
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mask = (1 << (self.port_end - port_num) - 2)
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# LPMode is active high
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if reg_value & mask == 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 - 2:
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return False
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try:
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reg_file = open("/sys/devices/platform/delta-et-c032if-cpld.0/sfp_lp_mode", "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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content = reg_file.readline().rstrip()
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# content is a string containing the hex representation of the register
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reg_value = int(content, 16)
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# Mask off the bit corresponding to our port
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mask = (1 << (self.port_end - port_num) - 2)
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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 = reg_value | mask
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else:
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reg_value = reg_value & ~mask
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# Convert our register value back to a hex string and write back
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content = hex(reg_value).rstrip("L") or "0"
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reg_file.seek(0)
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reg_file.write(content)
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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/devices/platform/delta-et-c032if-cpld.0/sfp_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 - 2:
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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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content = reg_file.readline().rstrip()
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# File content is a string containing the hex representation of the register
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reg_value = int(content, 16)
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# Mask off the bit corresponding to our port
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mask = (1 << (self.port_end - port_num) - 2)
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# ResetL is active low
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reg_value = reg_value & ~mask
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# Convert our register value back to a hex string and write back
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reg_file.seek(0)
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reg_file.write(hex(reg_value))
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reg_file.close()
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# Sleep 1 second to allow it to settle
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time.sleep(1)
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# Flip the bit back high and 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, "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_value = reg_value | mask
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reg_file.seek(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 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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port = self.port_start
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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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while timeout >= 0:
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# Check for OIR events and return updated port_dict
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reg_value = self.get_transceiver_status
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if reg_value != self.modprs_register:
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changed_ports = self.modprs_register ^ reg_value
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while port >= self.port_start and port <= self.port_end:
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# Mask off the bit corresponding to our port
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mask = (1 << (self.port_end - port + 6))
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if changed_ports & mask:
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# ModPrsL is active low
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if reg_value & mask == 0:
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port_dict[port] = '1'
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else:
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port_dict[port] = '0'
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port += 1
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# Update reg value
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self.modprs_register = reg_value
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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_transceiver_change_event: Should not reach here."
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return False, {}
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