a6efbaed97
Modify get_psu_presence(). Move read() and close() to "try: ... except IOError:" To avoid when read port present sysfs fail. This exception will let sfputil.py to exit. So "sfputil show eeprom" can't show other port status.
254 lines
7.1 KiB
Python
254 lines
7.1 KiB
Python
# 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 string
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import pprint
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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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#from xcvrd
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SFP_STATUS_REMOVED = '0'
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SFP_STATUS_INSERTED = '1'
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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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PORT_END = 27
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PORTS_IN_BLOCK = 27
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QSFP_PORT_START = 25
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QSFP_PORT_END = 27
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BASE_VAL_PATH = "/sys/class/i2c-adapter/i2c-{0}/{1}-0050/"
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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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_cpld_mapping = [ "8-0063", "7-0064"]
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_port_to_i2c_mapping = {
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1: 26,
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2: 27,
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3: 28,
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4: 29,
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5: 30,
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6: 31,
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7: 32,
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8: 33,
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9: 34,
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10: 35,
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11: 36,
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12: 37,
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13: 38,
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14: 39,
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15: 40,
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16: 41,
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17: 42,
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18: 43,
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19: 44,
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20: 45,
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21: 46,
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22: 47,
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23: 48,
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24: 49,
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25: 21, #QSFP
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26: 22,
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27: 23,
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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 = '/sys/bus/i2c/devices/{0}-0050/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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self.get_transceiver_change_event()
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SfpUtilBase.__init__(self)
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def get_cpld_num(self, port_num):
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cpld_i = 0
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if (port_num >= self.qsfp_port_start):
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cpld_i = 1
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return cpld_i
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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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cpld_i = self.get_cpld_num(port_num)
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cpld_ps = self._cpld_mapping[cpld_i]
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path = "/sys/bus/i2c/devices/{0}/present_{1}"
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index = ((port_num-1)%24) +1
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port_ps = path.format(cpld_ps, index)
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content = "0"
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try:
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val_file = open(port_ps)
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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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# Check for invalid 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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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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return False # 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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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_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], "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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raise NotImplementedError
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@property
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def _get_present_bitmap(self):
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nodes = []
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port_num = [24,3]
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path = "/sys/bus/i2c/devices/{0}/"
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cpld_path = path.format(self._cpld_mapping[0])
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nodes.append((cpld_path + "module_present_all", port_num[0]))
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cpld_path = path.format(self._cpld_mapping[1])
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nodes.append((cpld_path + "module_present_all", port_num[1]))
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bitmap = []
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for node in nodes:
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try:
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reg_file = open(node[0])
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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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cpld_bm = reg_file.readline().rstrip().zfill(node[1]/4)
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bitmap.append(cpld_bm)
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reg_file.close()
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rev = "".join(bitmap[::-1])
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return int(rev,16)
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data = {'valid':0, 'last':0, 'present':0}
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def get_transceiver_change_event(self, timeout=2000):
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now = time.time()
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port_dict = {}
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port = 0
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if timeout < 1000:
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timeout = 1000
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timeout = (timeout) / float(1000) # Convert to secs
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if now < (self.data['last'] + timeout) and self.data['valid']:
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return True, {}
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reg_value = self._get_present_bitmap
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changed_ports = self.data['present'] ^ reg_value
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if changed_ports:
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for port in range (self.port_start, self.port_end+1):
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# Mask off the bit corresponding to our port
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mask = (1 << (port - 1))
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if changed_ports & mask:
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if (reg_value & mask) == 0:
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port_dict[port] = SFP_STATUS_REMOVED
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else:
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port_dict[port] = SFP_STATUS_INSERTED
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# Update cache
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self.data['present'] = reg_value
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self.data['last'] = now
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self.data['valid'] = 1
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pprint.pprint(port_dict)
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return True, port_dict
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else:
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return True, {}
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return False, {}
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